diff --git a/os/os/linux/.vscode/settings.json b/os/os/linux/.vscode/settings.json new file mode 100644 index 0000000..be9f164 --- /dev/null +++ b/os/os/linux/.vscode/settings.json @@ -0,0 +1,9 @@ +{ + "files.associations": { + "*.json": "c", + "*.o": "plaintext", + "new.h": "c", + "new0.h": "c", + "errno.h": "c" + } +} \ No newline at end of file diff --git a/os/os/linux/Image b/os/os/linux/Image new file mode 100644 index 0000000..62185d1 Binary files /dev/null and b/os/os/linux/Image differ diff --git a/os/os/linux/Image.bkp b/os/os/linux/Image.bkp new file mode 100644 index 0000000..9869a43 Binary files /dev/null and b/os/os/linux/Image.bkp differ diff --git a/os/os/linux/Makefile b/os/os/linux/Makefile new file mode 100644 index 0000000..ecbcf30 --- /dev/null +++ b/os/os/linux/Makefile @@ -0,0 +1,125 @@ +# +# if you want the ram-disk device, define this to be the +# size in blocks. +# +RAMDISK = #-DRAMDISK=512 + +AS86 =as86 -0 -a +LD86 =ld86 -0 + +AS =as +LD =ld +LDFLAGS =-m elf_i386 -Ttext 0 -e startup_32 -Map=System.map.2 -N +CC =gcc -march=i386 $(RAMDISK) +CFLAGS =-w -g -fstrength-reduce -fomit-frame-pointer -fno-stack-protector -mcld +CPP =cpp -nostdinc -Iinclude + +# +# ROOT_DEV specifies the default root-device when making the image. +# This can be either FLOPPY, /dev/xxxx or empty, in which case the +# default of /dev/hd6 is used by 'build'. +# +ROOT_DEV= + +ARCHIVES=kernel/kernel.o mm/mm.o fs/fs.o +DRIVERS =kernel/blk_drv/blk_drv.a kernel/chr_drv/chr_drv.a +MATH =kernel/math/math.a +LIBS =lib/lib.a + +.c.s: + $(CC) $(CFLAGS) \ + -nostdinc -Iinclude -S -o $*.s $< +.s.o: + $(AS) -o $*.o $< +.c.o: + $(CC) $(CFLAGS) \ + -nostdinc -Iinclude -c -o $*.o $< + +all: Image + +Image: boot/bootsect boot/setup tools/system tools/build + cp -f tools/system system.tmp + strip system.tmp + tools/build boot/bootsect boot/setup system.tmp $(ROOT_DEV) > Image + rm -f system.tmp + sync + +disk: Image + dd bs=8192 if=Image of=/dev/PS0 + +tools/build: tools/build.c + $(CC) $(CFLAGS) \ + -o tools/build tools/build.c + +boot/head.o: boot/head.s + +tools/system: boot/head.o init/main.o \ + $(ARCHIVES) $(DRIVERS) $(MATH) $(LIBS) + $(LD) $(LDFLAGS) boot/head.o init/main.o \ + $(ARCHIVES) \ + $(DRIVERS) \ + $(MATH) \ + $(LIBS) \ + -o tools/system + nm tools/system | grep -v '\(compiled\)\|\(\.o$$\)\|\( [aUw]\)\|\(\.\.ng$$\)\|\(LASH[RL]DI\)' | sort >System.map + +kernel/math/math.a: FORCE + (cd kernel/math; make) + +kernel/blk_drv/blk_drv.a: FORCE + (cd kernel/blk_drv; make) + +kernel/chr_drv/chr_drv.a: FORCE + (cd kernel/chr_drv; make) + +kernel/kernel.o: FORCE + (cd kernel; make) + +mm/mm.o: FORCE + (cd mm; make) + +fs/fs.o: FORCE + (cd fs; make) + +lib/lib.a: FORCE + (cd lib; make) + +FORCE: + +boot/setup: boot/setup.s + $(AS86) -o boot/setup.o boot/setup.s + $(LD86) -s -o boot/setup boot/setup.o + +boot/bootsect: boot/bootsect.s + $(AS86) -o boot/bootsect.o boot/bootsect.s + $(LD86) -s -o boot/bootsect boot/bootsect.o + +tmp.s: boot/bootsect.s tools/system + (echo -n "SYSSIZE = (";ls -l tools/system | grep system \ + | cut -c25-31 | tr '\012' ' '; echo "+ 15 ) / 16") > tmp.s + cat boot/bootsect.s >> tmp.s + +clean: + rm -f Image System.map tmp_make core System.map.2 + rm -f boot/bootsect boot/setup + rm -f init/*.o tools/system tools/build boot/*.o + (cd mm;make clean) + (cd fs;make clean) + (cd kernel;make clean) + (cd lib;make clean) + +dep: + sed '/\#\#\# Dependencies/q' < Makefile > tmp_make + (for i in init/*.c;do echo -n "init/";$(CPP) -M $$i;done) >> tmp_make + cp tmp_make Makefile + (cd fs; make dep) + (cd kernel; make dep) + (cd mm; make dep) + +### Dependencies: +init/main.o : init/main.c include/unistd.h include/sys/stat.h \ + include/sys/types.h include/sys/times.h include/sys/utsname.h \ + include/utime.h include/time.h include/linux/tty.h include/termios.h \ + include/linux/sched.h include/linux/head.h include/linux/fs.h \ + include/linux/mm.h include/signal.h include/asm/system.h include/asm/io.h \ + include/stddef.h include/stdarg.h include/fcntl.h diff --git a/os/os/linux/System.map b/os/os/linux/System.map new file mode 100644 index 0000000..a25824e --- /dev/null +++ b/os/os/linux/System.map @@ -0,0 +1,598 @@ +00000000 T pg_dir +00000000 T startup_32 +0000005a t check_x87 +00000073 t setup_idt +00000090 t rp_sidt +000000a3 t setup_gdt +00001000 t pg0 +00002000 t pg1 +00003000 t pg2 +00004000 t pg3 +00005000 T tmp_floppy_area +00005412 t L6 +00005414 t int_msg +00005428 t ignore_int +00005450 t setup_paging +000054ae t idt_descr +000054b6 t gdt_descr +000054c0 T idt +00005cc0 T gdt +000064c0 T fork +000064ef T pause +0000651e T setup +00006555 T sync +00006584 t time_init +00006799 T main +0000690c t printf +0000695b T init +00006bd3 T print_nr +00006c04 T show_task +00006c89 T show_stat +00006ccf T math_state_restore +00006d2d T schedule +00006edf T sys_pause +00006ef5 T sleep_on +00006f54 T interruptible_sleep_on +0000700f T ticks_to_floppy_on +000070da T floppy_on +00007109 T 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+00019012 T execve +000190af T strcpy +000190cb T strncpy +000190f0 T strcat +0001911b T strncat +00019150 T strcmp +00019177 T strncmp +000191a5 T strchr +000191d2 T strrchr +00019201 T strspn +0001923e T strcspn +0001927b T strpbrk +000192b2 T strstr +000192eb T strlen +0001930e T strtok +00019391 T memcpy +000193b1 T memmove +00019405 T memcmp +0001942f T memchr +00019467 T memset +0001d5e8 d envp_rc +0001d5fc d envp +0001d620 D sys_call_table +0001d790 D NR_syscalls +0001d7a0 d init_task +0001e7a0 D current +0001e7c0 D task +0001e8c0 D stack_start +0001e8c8 D current_DOR +0001e8e0 d thisname.1955 +0001e920 d month +0001e960 d last_inode.1935 +0001e964 D start_buffer +0001e980 d crw_table +0001e9a0 d ioctl_table +0001e9c0 d floppy_type +0001ea80 d cur_spec1 +0001ea84 d cur_rate +0001ea88 d floppy +0001ea8c d current_track +0001ea90 d callable.1844 +0001eaa0 D tty_table +00020fc0 D table_list +00020fe0 d quotient +00021000 D _ctype +00021101 B __bss_start +00021101 D _edata +00021120 b printbuf +00021520 b memory_end +00021524 b buffer_memory_end +00021528 b main_memory_start +00021540 B jiffies +00021544 B startup_time +00021548 B last_task_used_math +0002155c b mon_timer +0002156c b moff_timer +00021580 b timer_list +00021880 b next_timer +00021884 B last_pid +000218a0 b buf +00021ca0 b HIGH_MEMORY +00021cc0 b mem_map +00022bc0 B inode_table +000232c0 B nr_buffers +000232c4 b free_list +000232c8 b buffer_wait +000232cc B ROOT_DEV +00023300 B blk_dev +00023338 B do_floppy +0002333c B selected +00023344 b recalibrate +00023348 b reset +0002334c b seek +00023350 b reply_buffer +00023357 b current_drive +00023358 b sector +00023359 b head +0002335a b track +0002335b b seek_track +0002335c b command +00023360 B do_hd +00023380 B hd_info +000233b0 b recalibrate +000233b4 b reset +000233b8 b NR_HD +000233c0 b hd +00023410 B rd_length +00023414 b cr_flag.1923 +00023420 B beepcount +00023424 b video_type +00023428 b video_num_columns +0002342c b video_size_row +00023430 b video_num_lines +00023434 b video_page +00023438 b video_mem_start +0002343c b video_mem_end +00023440 b video_port_reg +00023442 b video_port_val +00023444 b video_erase_char +00023448 b origin +0002344c b scr_end +00023450 b pos +00023454 b x +00023458 b y +0002345c b top +00023460 b bottom +00023464 b state +00023468 b npar +00023480 b par +000234c0 b ques +000234c4 b saved_x +000234c8 b saved_y +000234e0 B drive_info +00023500 B user_stack +00024500 B hash_table +000249e0 B super_block +00024d40 B file_table +00025140 B request +000255c0 B rd_start +000255c4 B _ctmp +000255c8 B errno +000255cc B ___strtok +000255d0 B end +000255d0 B _end diff --git a/os/os/linux/System.map.2 b/os/os/linux/System.map.2 new file mode 100644 index 0000000..f550302 --- /dev/null +++ b/os/os/linux/System.map.2 @@ -0,0 +1,1082 @@ +Archive member included to satisfy reference by file (symbol) + +kernel/blk_drv/blk_drv.a(ll_rw_blk.o) + fs/fs.o (ll_rw_block) +kernel/blk_drv/blk_drv.a(floppy.o) + kernel/kernel.o (do_floppy) +kernel/blk_drv/blk_drv.a(hd.o) + kernel/kernel.o (do_hd) +kernel/blk_drv/blk_drv.a(ramdisk.o) + kernel/blk_drv/blk_drv.a(hd.o) (rd_load) +kernel/chr_drv/chr_drv.a(tty_io.o) + kernel/kernel.o (tty_table) +kernel/chr_drv/chr_drv.a(console.o) + kernel/chr_drv/chr_drv.a(tty_io.o) (con_write) +kernel/chr_drv/chr_drv.a(keyboard.2.o) + kernel/chr_drv/chr_drv.a(console.o) (keyboard_interrupt) +kernel/chr_drv/chr_drv.a(serial.o) + kernel/chr_drv/chr_drv.a(tty_io.o) (rs_init) +kernel/chr_drv/chr_drv.a(rs_io.o) + kernel/chr_drv/chr_drv.a(serial.o) (rs1_interrupt) +kernel/chr_drv/chr_drv.a(tty_ioctl.o) + fs/fs.o (tty_ioctl) +kernel/math/math.a(math_emulate.o) + kernel/kernel.o (math_emulate) +lib/lib.a(ctype.o) kernel/chr_drv/chr_drv.a(tty_io.o) (_ctmp) +lib/lib.a(_exit.o) init/main.o (_exit) +lib/lib.a(open.o) init/main.o (open) +lib/lib.a(close.o) init/main.o (close) +lib/lib.a(errno.o) init/main.o (errno) +lib/lib.a(write.o) init/main.o (write) +lib/lib.a(dup.o) init/main.o (dup) +lib/lib.a(setsid.o) init/main.o (setsid) +lib/lib.a(execve.o) init/main.o (execve) +lib/lib.a(wait.o) init/main.o (wait) +lib/lib.a(string.o) kernel/kernel.o (strncpy) + +分配公共符号 +公共符号 大小 文件 + +errno 0x4 lib/lib.a(errno.o) +hash_table 0x4cc fs/fs.o +___strtok 0x4 lib/lib.a(string.o) +rd_start 0x4 kernel/blk_drv/blk_drv.a(ramdisk.o) +request 0x480 kernel/blk_drv/blk_drv.a(ll_rw_blk.o) +user_stack 0x1000 kernel/kernel.o +_ctmp 0x1 lib/lib.a(ctype.o) +super_block 0x360 fs/fs.o +drive_info 0x20 init/main.o +file_table 0x400 fs/fs.o + +Discarded input sections + + .note.GNU-stack + 0x0000000000000000 0x0 init/main.o + .note.GNU-stack + 0x0000000000000000 0x0 kernel/kernel.o + .note.GNU-stack + 0x0000000000000000 0x0 mm/mm.o + .note.GNU-stack + 0x0000000000000000 0x0 fs/fs.o + .note.GNU-stack + 0x0000000000000000 0x0 kernel/blk_drv/blk_drv.a(ll_rw_blk.o) + .note.GNU-stack + 0x0000000000000000 0x0 kernel/blk_drv/blk_drv.a(floppy.o) + .note.GNU-stack + 0x0000000000000000 0x0 kernel/blk_drv/blk_drv.a(hd.o) + .note.GNU-stack + 0x0000000000000000 0x0 kernel/blk_drv/blk_drv.a(ramdisk.o) + .note.GNU-stack + 0x0000000000000000 0x0 kernel/chr_drv/chr_drv.a(tty_io.o) + .note.GNU-stack + 0x0000000000000000 0x0 kernel/chr_drv/chr_drv.a(console.o) + .note.GNU-stack + 0x0000000000000000 0x0 kernel/chr_drv/chr_drv.a(serial.o) + .note.GNU-stack + 0x0000000000000000 0x0 kernel/chr_drv/chr_drv.a(tty_ioctl.o) + .note.GNU-stack + 0x0000000000000000 0x0 kernel/math/math.a(math_emulate.o) + .note.GNU-stack + 0x0000000000000000 0x0 lib/lib.a(ctype.o) + .note.GNU-stack + 0x0000000000000000 0x0 lib/lib.a(_exit.o) + .note.GNU-stack + 0x0000000000000000 0x0 lib/lib.a(open.o) + .note.GNU-stack + 0x0000000000000000 0x0 lib/lib.a(close.o) + .note.GNU-stack + 0x0000000000000000 0x0 lib/lib.a(errno.o) + .note.GNU-stack + 0x0000000000000000 0x0 lib/lib.a(write.o) + .note.GNU-stack + 0x0000000000000000 0x0 lib/lib.a(dup.o) + .note.GNU-stack + 0x0000000000000000 0x0 lib/lib.a(setsid.o) + .note.GNU-stack + 0x0000000000000000 0x0 lib/lib.a(execve.o) + .note.GNU-stack + 0x0000000000000000 0x0 lib/lib.a(wait.o) + .note.GNU-stack + 0x0000000000000000 0x0 lib/lib.a(string.o) + +内存配置 + +名称 来源 长度 属性 +*default* 0x0000000000000000 0xffffffffffffffff + +Linker script and memory map + +段 .text 的地址设置为 0x0 +LOAD boot/head.o +LOAD init/main.o +LOAD kernel/kernel.o +LOAD mm/mm.o +LOAD fs/fs.o +LOAD kernel/blk_drv/blk_drv.a +LOAD kernel/chr_drv/chr_drv.a +LOAD kernel/math/math.a +LOAD lib/lib.a + 0x0000000008048000 PROVIDE (__executable_start, 0x8048000) + 0x0000000008048074 . = (0x8048000 + SIZEOF_HEADERS) + +.interp + *(.interp) + +.note.gnu.build-id + *(.note.gnu.build-id) + +.hash + *(.hash) + +.gnu.hash + *(.gnu.hash) + +.dynsym + *(.dynsym) + +.dynstr + *(.dynstr) + +.gnu.version + *(.gnu.version) + +.gnu.version_d + *(.gnu.version_d) + +.gnu.version_r + *(.gnu.version_r) + +.rel.init + *(.rel.init) + +.rel.text 0x0000000008048074 0x0 + *(.rel.text .rel.text.* .rel.gnu.linkonce.t.*) + .rel.text 0x0000000000000000 0x0 boot/head.o + +.rel.fini + *(.rel.fini) + +.rel.rodata + *(.rel.rodata .rel.rodata.* .rel.gnu.linkonce.r.*) + +.rel.data.rel.ro + *(.rel.data.rel.ro .rel.data.rel.ro.* .rel.gnu.linkonce.d.rel.ro.*) + +.rel.data 0x0000000008048074 0x0 + *(.rel.data .rel.data.* .rel.gnu.linkonce.d.*) + .rel.data 0x0000000000000000 0x0 boot/head.o + +.rel.tdata + *(.rel.tdata .rel.tdata.* .rel.gnu.linkonce.td.*) + +.rel.tbss + *(.rel.tbss .rel.tbss.* .rel.gnu.linkonce.tb.*) + +.rel.ctors + *(.rel.ctors) + +.rel.dtors + *(.rel.dtors) + +.rel.got + *(.rel.got) + +.rel.bss + *(.rel.bss .rel.bss.* .rel.gnu.linkonce.b.*) + +.rel.ifunc + *(.rel.ifunc) + +.rel.plt 0x0000000008048074 0x0 + *(.rel.plt) + 0x0000000008048074 PROVIDE (__rel_iplt_start, .) + *(.rel.iplt) + .rel.iplt 0x0000000000000000 0x0 boot/head.o + 0x0000000008048074 PROVIDE (__rel_iplt_end, .) + +.init + *(SORT(.init)) + +.plt 0x0000000008048080 0x0 + *(.plt) + *(.iplt) + .iplt 0x0000000000000000 0x0 boot/head.o + +.text 0x0000000000000000 0x1948b + *(.text.unlikely .text.*_unlikely .text.unlikely.*) + *(.text.exit .text.exit.*) + *(.text.startup .text.startup.*) + *(.text.hot .text.hot.*) + *(.text .stub .text.* .gnu.linkonce.t.*) + .text 0x0000000000000000 0x64c0 boot/head.o + 0x0000000000000000 startup_32 + 0x0000000000000000 pg_dir + 0x0000000000005000 tmp_floppy_area + 0x00000000000054c0 idt + 0x0000000000005cc0 gdt + .text 0x00000000000064c0 0x744 init/main.o + 0x00000000000064c0 fork + 0x00000000000064ef pause + 0x000000000000651e setup + 0x0000000000006555 sync + 0x0000000000006799 main + 0x000000000000695b init + 0x0000000000006bd3 print_nr + .text 0x0000000000006c04 0x4eec kernel/kernel.o + 0x0000000000006c04 show_task + 0x0000000000006c89 show_stat + 0x0000000000006ccf math_state_restore + 0x0000000000006d2d schedule + 0x0000000000006edf sys_pause + 0x0000000000006ef5 sleep_on + 0x0000000000006f54 interruptible_sleep_on + 0x0000000000006fe7 wake_up + 0x000000000000700f ticks_to_floppy_on + 0x00000000000070da floppy_on + 0x0000000000007109 floppy_off + 0x0000000000007119 do_floppy_timer + 0x00000000000071ed add_timer + 0x0000000000007311 do_timer + 0x0000000000007400 sys_alarm + 0x000000000000747f sys_getpid + 0x000000000000748b sys_getppid + 0x0000000000007497 sys_getuid + 0x00000000000074a6 sys_geteuid + 0x00000000000074b6 sys_getgid + 0x00000000000074c6 sys_getegid + 0x00000000000074d5 sys_nice + 0x0000000000007500 sched_init + 0x00000000000076a4 system_call + 0x0000000000007728 coprocessor_error + 0x000000000000774a device_not_available + 0x0000000000007784 timer_interrupt + 0x00000000000077bc sys_execve + 0x00000000000077cc sys_execve2 + 0x00000000000077dc sys_fork + 0x00000000000077f4 hd_interrupt + 0x0000000000007830 floppy_interrupt + 0x0000000000007866 parallel_interrupt + 0x0000000000007a81 do_double_fault + 0x0000000000007aa4 do_general_protection + 0x0000000000007ac7 do_divide_error + 0x0000000000007aea do_int3 + 0x0000000000007bb2 do_nmi + 0x0000000000007bd5 do_debug + 0x0000000000007bf8 do_overflow + 0x0000000000007c1b do_bounds + 0x0000000000007c3e do_invalid_op + 0x0000000000007c61 do_device_not_available + 0x0000000000007c84 do_coprocessor_segment_overrun + 0x0000000000007ca7 do_invalid_TSS + 0x0000000000007cca do_segment_not_present + 0x0000000000007ced do_stack_segment + 0x0000000000007d10 do_coprocessor_error + 0x0000000000007d44 do_reserved + 0x0000000000007d67 trap_init + 0x000000000000804b divide_error + 0x0000000000008080 debug + 0x0000000000008087 nmi + 0x000000000000808e int3 + 0x0000000000008095 overflow + 0x000000000000809c bounds + 0x00000000000080a3 invalid_op + 0x00000000000080aa coprocessor_segment_overrun + 0x00000000000080b1 reserved + 0x00000000000080b8 irq13 + 0x00000000000080cd double_fault + 0x0000000000008104 invalid_TSS + 0x000000000000810b segment_not_present + 0x0000000000008112 stack_segment + 0x0000000000008119 general_protection + 0x0000000000008152 verify_area + 0x00000000000081b9 copy_mem + 0x0000000000008313 copy_process + 0x00000000000087c0 find_empty_process + 0x0000000000008854 panic + 0x000000000000889b sys_pipe2 + 0x0000000000008aa8 printk + 0x0000000000008dc5 vsprintf + 0x000000000000928b sys_ftime + 0x0000000000009291 sys_break + 0x0000000000009297 sys_ptrace + 0x000000000000929d sys_stty + 0x00000000000092a3 sys_gtty + 0x00000000000092a9 sys_rename + 0x00000000000092af sys_prof + 0x00000000000092b5 sys_setregid + 0x000000000000936e sys_setgid + 0x0000000000009405 sys_acct + 0x000000000000940b sys_phys + 0x0000000000009411 sys_lock + 0x0000000000009417 sys_mpx + 0x000000000000941d sys_ulimit + 0x0000000000009423 sys_time + 0x000000000000947f sys_setreuid + 0x0000000000009561 sys_setuid + 0x00000000000095f6 sys_stime + 0x000000000000964c sys_times + 0x00000000000096ec sys_brk + 0x000000000000972e sys_setpgid + 0x0000000000009807 sys_getpgrp + 0x0000000000009813 sys_setsid + 0x000000000000988d sys_getgroups + 0x0000000000009893 sys_setgroups + 0x0000000000009899 sys_uname + 0x0000000000009902 sys_sethostname + 0x0000000000009908 sys_getrlimit + 0x000000000000990e sys_setrlimit + 0x0000000000009914 sys_getrusage + 0x000000000000991a sys_gettimeofday + 0x0000000000009920 sys_settimeofday + 0x0000000000009926 sys_umask + 0x0000000000009959 sys_sleep + 0x0000000000009f04 do_execve2 + 0x000000000000aa14 release + 0x000000000000ab51 sys_kill + 0x000000000000ad8b do_exit + 0x000000000000afbf sys_exit + 0x000000000000afd8 sys_waitpid + 0x000000000000b230 sys_sgetmask + 0x000000000000b23c sys_ssetmask + 0x000000000000b268 sys_sigpending + 0x000000000000b26e sys_sigsuspend + 0x000000000000b307 sys_signal + 0x000000000000b38b sys_sigaction + 0x000000000000b495 do_signal + 0x000000000000b681 kernel_mktime + 0x000000000000b7de sys_getdents + 0x000000000000b921 sys_getcwd + .text 0x000000000000baf0 0xc96 mm/mm.o + 0x000000000000bb0f get_free_page + 0x000000000000bb4b free_page + 0x000000000000bbba free_page_tables + 0x000000000000bcb9 copy_page_tables + 0x000000000000be3a put_page + 0x000000000000bf26 un_wp_page + 0x000000000000bfde do_wp_page + 0x000000000000c010 write_verify + 0x000000000000c069 get_empty_page + 0x000000000000c2ef do_no_page + 0x000000000000c484 do_no_pagex + 0x000000000000c5e6 mem_init + 0x000000000000c65a calc_mem + 0x000000000000c74f page_fault + .text 0x000000000000c786 0x7539 fs/fs.o + 0x000000000000c79c sys_ustat + 0x000000000000c7a2 sys_utime + 0x000000000000c84f sys_access + 0x000000000000c92b sys_chdir + 0x000000000000c99f sys_chroot + 0x000000000000ca13 sys_chmod + 0x000000000000caad sys_chown + 0x000000000000cb28 sys_open + 0x000000000000cdcb sys_creat + 0x000000000000cdee sys_close + 0x000000000000cebd sys_lseek + 0x000000000000cfd4 sys_read + 0x000000000000d1c7 sys_write + 0x000000000000d3c0 invalidate_inodes + 0x000000000000d42f sync_inodes + 0x000000000000d872 bmap + 0x000000000000d895 create_block + 0x000000000000d8b8 iput + 0x000000000000da27 get_empty_inode + 0x000000000000db7c get_pipe_inode + 0x000000000000dbf1 iget + 0x000000000000dfec sys_sync + 0x000000000000e04f sync_dev + 0x000000000000e148 invalidate_buffers + 0x000000000000e1ba check_disk_change + 0x000000000000e488 get_hash_table + 0x000000000000e50a getblk + 0x000000000000e6a8 brelse + 0x000000000000e6f1 bread + 0x000000000000e776 bread_page + 0x000000000000e898 breada + 0x000000000000e98d buffer_init + 0x000000000000eb2e get_super + 0x000000000000eb9d put_super + 0x000000000000efb3 sys_umount + 0x000000000000f114 sys_mount + 0x000000000000f285 mount_root + 0x000000000000f4b9 block_write + 0x000000000000f60b block_read + 0x000000000000f976 rw_char + 0x000000000000fa06 file_read + 0x000000000000fbb1 file_write + 0x000000000000fe9a sys_stat + 0x000000000000fee4 sys_lstat + 0x000000000000feff sys_fstat + 0x000000000000ff5c sys_readlink + 0x000000000001000b sys_uselib + 0x00000000000104da do_execve + 0x0000000000010f8e read_pipe + 0x00000000000110e4 write_pipe + 0x0000000000011263 sys_pipe + 0x0000000000011c42 namei + 0x0000000000011d58 open_namei + 0x00000000000120ab sys_mknod + 0x00000000000122db sys_mkdir + 0x000000000001286a sys_rmdir + 0x0000000000012bc2 sys_unlink + 0x0000000000012e63 sys_symlink + 0x0000000000012e69 sys_link + 0x00000000000130c3 free_block + 0x0000000000013235 new_block + 0x00000000000133d9 free_inode + 0x0000000000013540 new_inode + 0x00000000000137f4 sys_dup2 + 0x000000000001381b sys_dup + 0x0000000000013836 sys_fcntl + 0x0000000000013975 sys_ioctl + 0x0000000000013b84 truncate + 0x0000000000013cb9 sys_select + .text 0x0000000000013cbf 0x46a kernel/blk_drv/blk_drv.a(ll_rw_blk.o) + 0x0000000000014082 ll_rw_block + 0x00000000000140db blk_dev_init + .text 0x0000000000014129 0xb9d kernel/blk_drv/blk_drv.a(floppy.o) + 0x000000000001420f floppy_deselect + 0x0000000000014246 floppy_change + 0x0000000000014603 setup_rw_floppy + 0x000000000001489c unexpected_floppy_interrupt + 0x0000000000014c74 floppy_init + .text 0x0000000000014cc6 0xc8f kernel/blk_drv/blk_drv.a(hd.o) + 0x0000000000014d9a sys_setup + 0x0000000000015449 unexpected_hd_interrupt + 0x00000000000158db hd_init + .text 0x0000000000015955 0x50c kernel/blk_drv/blk_drv.a(ramdisk.o) + 0x0000000000015b5f rd_init + 0x0000000000015bb5 rd_load + .text 0x0000000000015e61 0xcbb kernel/chr_drv/chr_drv.a(tty_io.o) + 0x0000000000015e87 tty_init + 0x0000000000015e98 tty_intr + 0x0000000000015fa5 wait_for_keypress + 0x0000000000015fb8 copy_to_cooked + 0x0000000000016573 tty_read + 0x00000000000168e1 tty_write + 0x0000000000016af3 do_tty_interrupt + 0x0000000000016b1b chr_dev_init + .text 0x0000000000016b1c 0x1283 kernel/chr_drv/chr_drv.a(console.o) + 0x00000000000170b9 csi_m + 0x0000000000017453 con_write + 0x0000000000017ae1 con_init + 0x0000000000017d18 sysbeepstop + .text 0x0000000000017d9f 0x7e2 kernel/chr_drv/chr_drv.a(keyboard.2.o) + 0x0000000000017da2 keyboard_interrupt + .text 0x0000000000018581 0x145 kernel/chr_drv/chr_drv.a(serial.o) + 0x00000000000185f6 rs_init + 0x0000000000018679 rs_write + *fill* 0x00000000000186c6 0x2 + .text 0x00000000000186c8 0xf7 kernel/chr_drv/chr_drv.a(rs_io.o) + 0x00000000000186c8 rs1_interrupt + 0x00000000000186d0 rs2_interrupt + .text 0x00000000000187bf 0x60f kernel/chr_drv/chr_drv.a(tty_ioctl.o) + 0x0000000000018ad0 tty_ioctl + .text 0x0000000000018dce 0x111 kernel/math/math.a(math_emulate.o) + 0x0000000000018ddc math_emulate + 0x0000000000018ebf math_error + .text 0x0000000000018edf 0x0 lib/lib.a(ctype.o) + .text 0x0000000000018edf 0x10 lib/lib.a(_exit.o) + 0x0000000000018edf _exit + .text 0x0000000000018eef 0x49 lib/lib.a(open.o) + 0x0000000000018eef open + .text 0x0000000000018f38 0x37 lib/lib.a(close.o) + 0x0000000000018f38 close + .text 0x0000000000018f6f 0x0 lib/lib.a(errno.o) + .text 0x0000000000018f6f 0x3d lib/lib.a(write.o) + 0x0000000000018f6f write + .text 0x0000000000018fac 0x37 lib/lib.a(dup.o) + 0x0000000000018fac dup + .text 0x0000000000018fe3 0x2f lib/lib.a(setsid.o) + 0x0000000000018fe3 setsid + .text 0x0000000000019012 0x3d lib/lib.a(execve.o) + 0x0000000000019012 execve + .text 0x000000000001904f 0x60 lib/lib.a(wait.o) + 0x000000000001904f waitpid + 0x000000000001908c wait + .text 0x00000000000190af 0x3dc lib/lib.a(string.o) + 0x00000000000190af strcpy + 0x00000000000190cb strncpy + 0x00000000000190f0 strcat + 0x000000000001911b strncat + 0x0000000000019150 strcmp + 0x0000000000019177 strncmp + 0x00000000000191a5 strchr + 0x00000000000191d2 strrchr + 0x0000000000019201 strspn + 0x000000000001923e strcspn + 0x000000000001927b strpbrk + 0x00000000000192b2 strstr + 0x00000000000192eb strlen + 0x000000000001930e strtok + 0x0000000000019391 memcpy + 0x00000000000193b1 memmove + 0x0000000000019405 memcmp + 0x000000000001942f memchr + 0x0000000000019467 memset + *(.gnu.warning) + +.fini + *(SORT(.fini)) + 0x000000000001948b PROVIDE (__etext, .) + 0x000000000001948b PROVIDE (_etext, .) + 0x000000000001948b PROVIDE (etext, .) + +.rodata 0x000000000001948c 0x146e + *(.rodata .rodata.* .gnu.linkonce.r.*) + .rodata 0x000000000001948c 0xc9 init/main.o + *fill* 0x0000000000019555 0x3 + .rodata 0x0000000000019558 0x498 kernel/kernel.o + .rodata 0x00000000000199f0 0x1b5 mm/mm.o + *fill* 0x0000000000019ba5 0x3 + .rodata 0x0000000000019ba8 0x62c fs/fs.o + .rodata 0x000000000001a1d4 0x7a kernel/blk_drv/blk_drv.a(ll_rw_blk.o) + *fill* 0x000000000001a24e 0x2 + .rodata 0x000000000001a250 0x133 kernel/blk_drv/blk_drv.a(floppy.o) + *fill* 0x000000000001a383 0x1 + .rodata 0x000000000001a384 0x19b kernel/blk_drv/blk_drv.a(hd.o) + *fill* 0x000000000001a51f 0x1 + .rodata 0x000000000001a520 0x188 kernel/blk_drv/blk_drv.a(ramdisk.o) + .rodata 0x000000000001a6a8 0x17d kernel/chr_drv/chr_drv.a(console.o) + *fill* 0x000000000001a825 0x3 + .rodata 0x000000000001a828 0x80 kernel/chr_drv/chr_drv.a(tty_ioctl.o) + .rodata 0x000000000001a8a8 0x52 kernel/math/math.a(math_emulate.o) + +.rodata1 + *(.rodata1) + +.eh_frame_hdr + *(.eh_frame_hdr) + +.eh_frame 0x000000000001a8fc 0x2cc8 + *(.eh_frame) + .eh_frame 0x000000000001a8fc 0x108 init/main.o + .eh_frame 0x000000000001aa04 0xd2c kernel/kernel.o + 0xe64 (size before relaxing) + .eh_frame 0x000000000001b730 0x1b0 mm/mm.o + 0x1c8 (size before relaxing) + .eh_frame 0x000000000001b8e0 0xdd8 fs/fs.o + 0xf70 (size before relaxing) + .eh_frame 0x000000000001c6b8 0x98 kernel/blk_drv/blk_drv.a(ll_rw_blk.o) + 0xb0 (size before relaxing) + .eh_frame 0x000000000001c750 0x23c kernel/blk_drv/blk_drv.a(floppy.o) + 0x254 (size before relaxing) + .eh_frame 0x000000000001c98c 0x1e8 kernel/blk_drv/blk_drv.a(hd.o) + 0x200 (size before relaxing) + .eh_frame 0x000000000001cb74 0xac kernel/blk_drv/blk_drv.a(ramdisk.o) + 0xc4 (size before relaxing) + .eh_frame 0x000000000001cc20 0x12c kernel/chr_drv/chr_drv.a(tty_io.o) + 0x144 (size before relaxing) + .eh_frame 0x000000000001cd4c 0x2c0 kernel/chr_drv/chr_drv.a(console.o) + 0x2d8 (size before relaxing) + .eh_frame 0x000000000001d00c 0x54 kernel/chr_drv/chr_drv.a(serial.o) + 0x6c (size before relaxing) 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SYS_SIZE is the number of clicks (16 bytes) to be loaded. +! 0x3000 is 0x30000 bytes = 196kB, more than enough for current +! versions of linux +! +SYSSIZE = 0x3000 +! +! bootsect.s (C) 1991 Linus Torvalds +! +! bootsect.s is loaded at 0x7c00 by the bios-startup routines, and moves +! iself out of the way to address 0x90000, and jumps there. +! +! It then loads 'setup' directly after itself (0x90200), and the system +! at 0x10000, using BIOS interrupts. +! +! NOTE! currently system is at most 8*65536 bytes long. This should be no +! problem, even in the future. I want to keep it simple. This 512 kB +! kernel size should be enough, especially as this doesn't contain the +! buffer cache as in minix +! +! The loader has been made as simple as possible, and continuos +! read errors will result in a unbreakable loop. Reboot by hand. It +! loads pretty fast by getting whole sectors at a time whenever possible. + +.globl begtext, begdata, begbss, endtext, enddata, endbss +.text +begtext: +.data +begdata: +.bss +begbss: +.text + +SETUPLEN = 4 ! nr of setup-sectors +BOOTSEG = 0x07c0 ! original address of boot-sector +INITSEG = 0x9000 ! we move boot here - out of the way +SETUPSEG = 0x9020 ! setup starts here +SYSSEG = 0x1000 ! system loaded at 0x10000 (65536). +ENDSEG = SYSSEG + SYSSIZE ! where to stop loading + +! ROOT_DEV: 0x000 - same type of floppy as boot. +! 0x301 - first partition on first drive etc +ROOT_DEV = 0x306 + +entry start +start: + mov ax,#BOOTSEG + mov ds,ax + mov ax,#INITSEG + mov es,ax + mov cx,#256 + sub si,si + sub di,di + rep + movw + jmpi go,INITSEG +go: mov ax,cs + mov ds,ax + mov es,ax +! put stack at 0x9ff00. + mov ss,ax + mov sp,#0xFF00 ! arbitrary value >>512 + +! load the setup-sectors directly after the bootblock. +! Note that 'es' is already set up. + +load_setup: + mov dx,#0x0000 ! drive 0, head 0 + mov cx,#0x0002 ! sector 2, track 0 + mov bx,#0x0200 ! address = 512, in INITSEG + mov ax,#0x0200+SETUPLEN ! service 2, nr of sectors + int 0x13 ! read it + jnc ok_load_setup ! ok - continue + mov dx,#0x0000 + mov ax,#0x0000 ! reset the diskette + int 0x13 + j load_setup + +ok_load_setup: + +! Get disk drive parameters, specifically nr of sectors/track + + mov dl,#0x00 + mov ax,#0x0800 ! AH=8 is get drive parameters + int 0x13 + mov ch,#0x00 + seg cs + mov sectors,cx + mov ax,#INITSEG + mov es,ax + +! Print some inane message + + mov ah,#0x03 ! read cursor pos + xor bh,bh + int 0x10 + + mov cx,#24 + mov bx,#0x0007 ! page 0, attribute 7 (normal) + mov bp,#msg1 + mov ax,#0x1301 ! write string, move cursor + int 0x10 + +! ok, we've written the message, now +! we want to load the system (at 0x10000) + + mov ax,#SYSSEG + mov es,ax ! segment of 0x010000 + call read_it + call kill_motor + +! After that we check which root-device to use. If the device is +! defined (!= 0), nothing is done and the given device is used. +! Otherwise, either /dev/PS0 (2,28) or /dev/at0 (2,8), depending +! on the number of sectors that the BIOS reports currently. + + seg cs + mov ax,root_dev + cmp ax,#0 + jne root_defined + seg cs + mov bx,sectors + mov ax,#0x0208 ! /dev/ps0 - 1.2Mb + cmp bx,#15 + je root_defined + mov ax,#0x021c ! /dev/PS0 - 1.44Mb + cmp bx,#18 + je root_defined +undef_root: + jmp undef_root +root_defined: + seg cs + mov root_dev,ax + +! after that (everyting loaded), we jump to +! the setup-routine loaded directly after +! the bootblock: + + jmpi 0,SETUPSEG + +! This routine loads the system at address 0x10000, making sure +! no 64kB boundaries are crossed. We try to load it as fast as +! possible, loading whole tracks whenever we can. +! +! in: es - starting address segment (normally 0x1000) +! +sread: .word 1+SETUPLEN ! sectors read of current track +head: .word 0 ! current head +track: .word 0 ! current track + +read_it: + mov ax,es + test ax,#0x0fff +die: jne die ! es must be at 64kB boundary + xor bx,bx ! bx is starting address within segment +rp_read: + mov ax,es + cmp ax,#ENDSEG ! have we loaded all yet? + jb ok1_read + ret +ok1_read: + seg cs + mov ax,sectors + sub ax,sread + mov cx,ax + shl cx,#9 + add cx,bx + jnc ok2_read + je ok2_read + xor ax,ax + sub ax,bx + shr ax,#9 +ok2_read: + call read_track + mov cx,ax + add ax,sread + seg cs + cmp ax,sectors + jne ok3_read + mov ax,#1 + sub ax,head + jne ok4_read + inc track +ok4_read: + mov head,ax + xor ax,ax +ok3_read: + mov sread,ax + shl cx,#9 + add bx,cx + jnc rp_read + mov ax,es + add ax,#0x1000 + mov es,ax + xor bx,bx + jmp rp_read + +read_track: + push ax + push bx + push cx + push dx + mov dx,track + mov cx,sread + inc cx + mov ch,dl + mov dx,head + mov dh,dl + mov dl,#0 + and dx,#0x0100 + mov ah,#2 + int 0x13 + jc bad_rt + pop dx + pop cx + pop bx + pop ax + ret +bad_rt: mov ax,#0 + mov dx,#0 + int 0x13 + pop dx + pop cx + pop bx + pop ax + jmp read_track + +/* + * This procedure turns off the floppy drive motor, so + * that we enter the kernel in a known state, and + * don't have to worry about it later. + */ +kill_motor: + push dx + mov dx,#0x3f2 + mov al,#0 + outb + pop dx + ret + +sectors: + .word 0 + +msg1: + .byte 13,10 + .ascii "Loading system ..." + .byte 13,10,13,10 + +.org 508 +root_dev: + .word ROOT_DEV +boot_flag: + .word 0xAA55 + +.text +endtext: +.data +enddata: +.bss +endbss: diff --git a/os/os/linux/boot/head.o b/os/os/linux/boot/head.o new file mode 100644 index 0000000..a4c5564 Binary files /dev/null and b/os/os/linux/boot/head.o differ diff --git a/os/os/linux/boot/head.s b/os/os/linux/boot/head.s new file mode 100644 index 0000000..651e95c --- /dev/null +++ b/os/os/linux/boot/head.s @@ -0,0 +1,240 @@ +/* + * linux/boot/head.s + * + * (C) 1991 Linus Torvalds + */ + +/* + * head.s contains the 32-bit startup code. + * + * NOTE!!! Startup happens at absolute address 0x00000000, which is also where + * the page directory will exist. The startup code will be overwritten by + * the page directory. + */ +.text +.globl idt,gdt,pg_dir,tmp_floppy_area +pg_dir: +.globl startup_32 +startup_32: + movl $0x10,%eax + mov %ax,%ds + mov %ax,%es + mov %ax,%fs + mov %ax,%gs + lss stack_start,%esp + call setup_idt + call setup_gdt + movl $0x10,%eax # reload all the segment registers + mov %ax,%ds # after changing gdt. CS was already + mov %ax,%es # reloaded in 'setup_gdt' + mov %ax,%fs + mov %ax,%gs + lss stack_start,%esp + xorl %eax,%eax +1: incl %eax # check that A20 really IS enabled + movl %eax,0x000000 # loop forever if it isn't + cmpl %eax,0x100000 + je 1b +/* + * NOTE! 486 should set bit 16, to check for write-protect in supervisor + * mode. Then it would be unnecessary with the "verify_area()"-calls. + * 486 users probably want to set the NE (#5) bit also, so as to use + * int 16 for math errors. + */ + movl %cr0,%eax # check math chip + andl $0x80000011,%eax # Save PG,PE,ET +/* "orl $0x10020,%eax" here for 486 might be good */ + orl $2,%eax # set MP + movl %eax,%cr0 + call check_x87 + jmp after_page_tables + +/* + * We depend on ET to be correct. This checks for 287/387. + */ +check_x87: + fninit + fstsw %ax + cmpb $0,%al + je 1f /* no coprocessor: have to set bits */ + movl %cr0,%eax + xorl $6,%eax /* reset MP, set EM */ + movl %eax,%cr0 + ret +.align 4 +1: .byte 0xDB,0xE4 /* fsetpm for 287, ignored by 387 */ + ret + +/* + * setup_idt + * + * sets up a idt with 256 entries pointing to + * ignore_int, interrupt gates. It then loads + * idt. Everything that wants to install itself + * in the idt-table may do so themselves. Interrupts + * are enabled elsewhere, when we can be relatively + * sure everything is ok. This routine will be over- + * written by the page tables. + */ +setup_idt: + lea ignore_int,%edx + movl $0x00080000,%eax + movw %dx,%ax /* selector = 0x0008 = cs */ + movw $0x8E00,%dx /* interrupt gate - dpl=0, present */ + + lea idt,%edi + mov $256,%ecx +rp_sidt: + movl %eax,(%edi) + movl %edx,4(%edi) + addl $8,%edi + dec %ecx + jne rp_sidt + lidt idt_descr + ret + +/* + * setup_gdt + * + * This routines sets up a new gdt and loads it. + * Only two entries are currently built, the same + * ones that were built in init.s. The routine + * is VERY complicated at two whole lines, so this + * rather long comment is certainly needed :-). + * This routine will beoverwritten by the page tables. + */ +setup_gdt: + lgdt gdt_descr + ret + +/* + * I put the kernel page tables right after the page directory, + * using 4 of them to span 16 Mb of physical memory. People with + * more than 16MB will have to expand this. + */ +.org 0x1000 +pg0: + +.org 0x2000 +pg1: + +.org 0x3000 +pg2: + +.org 0x4000 +pg3: + +.org 0x5000 +/* + * tmp_floppy_area is used by the floppy-driver when DMA cannot + * reach to a buffer-block. It needs to be aligned, so that it isn't + * on a 64kB border. + */ +tmp_floppy_area: + .fill 1024,1,0 + +after_page_tables: + pushl $0 # These are the parameters to main :-) + pushl $0 + pushl $0 + pushl $L6 # return address for main, if it decides to. + pushl $main + jmp setup_paging +L6: + jmp L6 # main should never return here, but + # just in case, we know what happens. + +/* This is the default interrupt "handler" :-) */ +int_msg: + .asciz "Unknown interrupt\n\r" +.align 4 +ignore_int: + pushl %eax + pushl %ecx + pushl %edx + push %ds + push %es + push %fs + movl $0x10,%eax + mov %ax,%ds + mov %ax,%es + mov %ax,%fs + pushl $int_msg + call printk + popl %eax + pop %fs + pop %es + pop %ds + popl %edx + popl %ecx + popl %eax + iret + + +/* + * Setup_paging + * + * This routine sets up paging by setting the page bit + * in cr0. The page tables are set up, identity-mapping + * the first 16MB. The pager assumes that no illegal + * addresses are produced (ie >4Mb on a 4Mb machine). + * + * NOTE! Although all physical memory should be identity + * mapped by this routine, only the kernel page functions + * use the >1Mb addresses directly. All "normal" functions + * use just the lower 1Mb, or the local data space, which + * will be mapped to some other place - mm keeps track of + * that. + * + * For those with more memory than 16 Mb - tough luck. I've + * not got it, why should you :-) The source is here. Change + * it. (Seriously - it shouldn't be too difficult. Mostly + * change some constants etc. I left it at 16Mb, as my machine + * even cannot be extended past that (ok, but it was cheap :-) + * I've tried to show which constants to change by having + * some kind of marker at them (search for "16Mb"), but I + * won't guarantee that's all :-( ) + */ +.align 4 +setup_paging: + movl $1024*5,%ecx /* 5 pages - pg_dir+4 page tables */ + xorl %eax,%eax + xorl %edi,%edi /* pg_dir is at 0x000 */ + cld;rep;stosl + movl $pg0+7,pg_dir /* set present bit/user r/w */ + movl $pg1+7,pg_dir+4 /* --------- " " --------- */ + movl $pg2+7,pg_dir+8 /* --------- " " --------- */ + movl $pg3+7,pg_dir+12 /* --------- " " --------- */ + movl $pg3+4092,%edi + movl $0xfff007,%eax /* 16Mb - 4096 + 7 (r/w user,p) */ + std +1: stosl /* fill pages backwards - more efficient :-) */ + subl $0x1000,%eax + jge 1b + xorl %eax,%eax /* pg_dir is at 0x0000 */ + movl %eax,%cr3 /* cr3 - page directory start */ + movl %cr0,%eax + orl $0x80000000,%eax + movl %eax,%cr0 /* set paging (PG) bit */ + cld /* by wyj */ + ret /* this also flushes prefetch-queue */ + +.align 4 +.word 0 +idt_descr: + .word 256*8-1 # idt contains 256 entries + .long idt +.align 4 +.word 0 +gdt_descr: + .word 256*8-1 # so does gdt (not that that's any + .long gdt # magic number, but it works for me :^) + + .align 8 +idt: .fill 256,8,0 # idt is uninitialized + +gdt: .quad 0x0000000000000000 /* NULL descriptor */ + .quad 0x00c09a0000000fff /* 16Mb */ + .quad 0x00c0920000000fff /* 16Mb */ + .quad 0x0000000000000000 /* TEMPORARY - don't use */ + .fill 252,8,0 /* space for LDT's and TSS's etc */ diff --git a/os/os/linux/boot/setup b/os/os/linux/boot/setup new file mode 100644 index 0000000..0e70f48 Binary files /dev/null and b/os/os/linux/boot/setup differ diff --git a/os/os/linux/boot/setup.o b/os/os/linux/boot/setup.o new file mode 100644 index 0000000..57d8207 Binary files /dev/null and b/os/os/linux/boot/setup.o differ diff --git a/os/os/linux/boot/setup.s b/os/os/linux/boot/setup.s new file mode 100644 index 0000000..2329d00 --- /dev/null +++ b/os/os/linux/boot/setup.s @@ -0,0 +1,231 @@ +! +! setup.s (C) 1991 Linus Torvalds +! +! setup.s is responsible for getting the system data from the BIOS, +! and putting them into the appropriate places in system memory. +! both setup.s and system has been loaded by the bootblock. +! +! This code asks the bios for memory/disk/other parameters, and +! puts them in a "safe" place: 0x90000-0x901FF, ie where the +! boot-block used to be. It is then up to the protected mode +! system to read them from there before the area is overwritten +! for buffer-blocks. +! + +! NOTE! These had better be the same as in bootsect.s! + +INITSEG = 0x9000 ! we move boot here - out of the way +SYSSEG = 0x1000 ! system loaded at 0x10000 (65536). +SETUPSEG = 0x9020 ! this is the current segment + +.globl begtext, begdata, begbss, endtext, enddata, endbss +.text +begtext: +.data +begdata: +.bss +begbss: +.text + +entry start +start: + +! ok, the read went well so we get current cursor position and save it for +! posterity. + + mov ax,#INITSEG ! this is done in bootsect already, but... + mov ds,ax + mov ah,#0x03 ! read cursor pos + xor bh,bh + int 0x10 ! save it in known place, con_init fetches + mov [0],dx ! it from 0x90000. + +! Get memory size (extended mem, kB) + + mov ah,#0x88 + int 0x15 + mov [2],ax + +! Get video-card data: + + mov ah,#0x0f + int 0x10 + mov [4],bx ! bh = display page + mov [6],ax ! al = video mode, ah = window width + +! check for EGA/VGA and some config parameters + + mov ah,#0x12 + mov bl,#0x10 + int 0x10 + mov [8],ax + mov [10],bx + mov [12],cx + +! Get hd0 data + + mov ax,#0x0000 + mov ds,ax + lds si,[4*0x41] + mov ax,#INITSEG + mov es,ax + mov di,#0x0080 + mov cx,#0x10 + rep + movsb + +! Get hd1 data + + mov ax,#0x0000 + mov ds,ax + lds si,[4*0x46] + mov ax,#INITSEG + mov es,ax + mov di,#0x0090 + mov cx,#0x10 + rep + movsb + +! Check that there IS a hd1 :-) + + mov ax,#0x01500 + mov dl,#0x81 + int 0x13 + jc no_disk1 + cmp ah,#3 + je is_disk1 +no_disk1: + mov ax,#INITSEG + mov es,ax + mov di,#0x0090 + mov cx,#0x10 + mov ax,#0x00 + rep + stosb +is_disk1: + +! now we want to move to protected mode ... + + cli ! no interrupts allowed ! + +! first we move the system to it's rightful place + + mov ax,#0x0000 + cld ! 'direction'=0, movs moves forward +do_move: + mov es,ax ! destination segment + add ax,#0x1000 + cmp ax,#0x9000 + jz end_move + mov ds,ax ! source segment + sub di,di + sub si,si + mov cx,#0x8000 + rep + movsw + jmp do_move + +! then we load the segment descriptors + +end_move: + mov ax,#SETUPSEG ! right, forgot this at first. didn't work :-) + mov ds,ax + lidt idt_48 ! load idt with 0,0 + lgdt gdt_48 ! load gdt with whatever appropriate + +! that was painless, now we enable A20 + + call empty_8042 + mov al,#0xD1 ! command write + out #0x64,al + call empty_8042 + mov al,#0xDF ! A20 on + out #0x60,al + call empty_8042 + +! well, that went ok, I hope. Now we have to reprogram the interrupts :-( +! we put them right after the intel-reserved hardware interrupts, at +! int 0x20-0x2F. There they won't mess up anything. Sadly IBM really +! messed this up with the original PC, and they haven't been able to +! rectify it afterwards. Thus the bios puts interrupts at 0x08-0x0f, +! which is used for the internal hardware interrupts as well. We just +! have to reprogram the 8259's, and it isn't fun. + + mov al,#0x11 ! initialization sequence + out #0x20,al ! send it to 8259A-1 + .word 0x00eb,0x00eb ! jmp $+2, jmp $+2 + out #0xA0,al ! and to 8259A-2 + .word 0x00eb,0x00eb + mov al,#0x20 ! start of hardware int's (0x20) + out #0x21,al + .word 0x00eb,0x00eb + mov al,#0x28 ! start of hardware int's 2 (0x28) + out #0xA1,al + .word 0x00eb,0x00eb + mov al,#0x04 ! 8259-1 is master + out #0x21,al + .word 0x00eb,0x00eb + mov al,#0x02 ! 8259-2 is slave + out #0xA1,al + .word 0x00eb,0x00eb + mov al,#0x01 ! 8086 mode for both + out #0x21,al + .word 0x00eb,0x00eb + out #0xA1,al + .word 0x00eb,0x00eb + mov al,#0xFF ! mask off all interrupts for now + out #0x21,al + .word 0x00eb,0x00eb + out #0xA1,al + +! well, that certainly wasn't fun :-(. Hopefully it works, and we don't +! need no steenking BIOS anyway (except for the initial loading :-). +! The BIOS-routine wants lots of unnecessary data, and it's less +! "interesting" anyway. This is how REAL programmers do it. +! +! Well, now's the time to actually move into protected mode. To make +! things as simple as possible, we do no register set-up or anything, +! we let the gnu-compiled 32-bit programs do that. We just jump to +! absolute address 0x00000, in 32-bit protected mode. + + mov ax,#0x0001 ! protected mode (PE) bit + lmsw ax ! This is it! + jmpi 0,8 ! jmp offset 0 of segment 8 (cs) + +! This routine checks that the keyboard command queue is empty +! No timeout is used - if this hangs there is something wrong with +! the machine, and we probably couldn't proceed anyway. +empty_8042: + .word 0x00eb,0x00eb + in al,#0x64 ! 8042 status port + test al,#2 ! is input buffer full? + jnz empty_8042 ! yes - loop + ret + +gdt: + .word 0,0,0,0 ! dummy + + .word 0x07FF ! 8Mb - limit=2047 (2048*4096=8Mb) + .word 0x0000 ! base address=0 + .word 0x9A00 ! code read/exec + .word 0x00C0 ! granularity=4096, 386 + + .word 0x07FF ! 8Mb - limit=2047 (2048*4096=8Mb) + .word 0x0000 ! base address=0 + .word 0x9200 ! data read/write + .word 0x00C0 ! granularity=4096, 386 + +idt_48: + .word 0 ! idt limit=0 + .word 0,0 ! idt base=0L + +gdt_48: + .word 0x800 ! gdt limit=2048, 256 GDT entries + .word 512+gdt,0x9 ! gdt base = 0X9xxxx + +.text +endtext: +.data +enddata: +.bss +endbss: diff --git a/os/os/linux/execve2.patch b/os/os/linux/execve2.patch new file mode 100644 index 0000000..7d99d4f --- /dev/null +++ b/os/os/linux/execve2.patch @@ -0,0 +1,41 @@ +diff -Naur 0/linux/init/main.c 4/linux/init/main.c +--- 0/linux/init/main.c 2016-08-08 09:40:13.000000000 +0800 ++++ 4/linux/init/main.c 2021-07-06 14:16:56.000000000 +0800 +@@ -208,3 +208,9 @@ + } + _exit(0); /* NOTE! _exit, not exit() */ + } ++ ++void print_nr(int sid) ++{ ++ if (sid > 86) ++ printk(" --syscall: sid=%d, pid=%d\n", sid, current->pid); ++} +diff -Naur 0/linux/kernel/system_call.s 4/linux/kernel/system_call.s +--- 0/linux/kernel/system_call.s 2015-09-03 20:21:09.000000000 +0800 ++++ 4/linux/kernel/system_call.s 2021-07-06 14:18:56.000000000 +0800 +@@ -91,6 +91,11 @@ + mov %dx,%es + movl $0x17,%edx # fs points to local data space + mov %dx,%fs ++ ++ pushl %eax #by wyj ++ call print_nr ++ popl %eax ++ + call sys_call_table(,%eax,4) + pushl %eax + movl current,%eax +diff -Naur 0/linux/mm/memory.c 4/linux/mm/memory.c +--- 0/linux/mm/memory.c 2015-09-04 15:24:20.000000000 +0800 ++++ 4/linux/mm/memory.c 2021-07-06 14:21:45.000000000 +0800 +@@ -370,6 +370,9 @@ + unsigned long page; + int block,i; + ++ if (current->pid > 5) ++ printk(" --do_no_page: address=%x, pid=%d\n", address, current->pid); ++ + address &= 0xfffff000; + tmp = address - current->start_code; + if (!current->executable || tmp >= current->end_data) { diff --git a/os/os/linux/fs/Makefile b/os/os/linux/fs/Makefile new file mode 100644 index 0000000..970acd4 --- /dev/null +++ b/os/os/linux/fs/Makefile @@ -0,0 +1,101 @@ +AR =ar +AS =as +LD =ld +LDFLAGS =-s -x +CC =gcc -march=i386 +CFLAGS =-w -g -fstrength-reduce -fomit-frame-pointer -mcld \ + -finline-functions -nostdinc -fno-stack-protector -I../include +CPP =gcc -E -nostdinc -I../include + +.c.s: + $(CC) $(CFLAGS) \ + -S -o $*.s $< +.c.o: + $(CC) $(CFLAGS) \ + -c -o $*.o $< +.s.o: + $(AS) -o $*.o $< + +OBJS= open.o read_write.o inode.o file_table.o buffer.o super.o \ + block_dev.o char_dev.o file_dev.o stat.o exec.o pipe.o namei.o \ + bitmap.o fcntl.o ioctl.o truncate.o select.o + +fs.o: $(OBJS) + $(LD) -r -o fs.o $(OBJS) + +clean: + rm -f core *.o *.a tmp_make + for i in *.c;do rm -f `basename $$i .c`.s;done + +dep: + sed '/\#\#\# Dependencies/q' < Makefile > tmp_make + (for i in *.c;do $(CPP) -M $$i;done) >> tmp_make + cp tmp_make Makefile + +### Dependencies: +bitmap.o : bitmap.c ../include/string.h ../include/linux/sched.h \ + ../include/linux/head.h ../include/linux/fs.h ../include/sys/types.h \ + ../include/linux/mm.h ../include/signal.h ../include/linux/kernel.h +block_dev.o : block_dev.c ../include/errno.h ../include/linux/sched.h \ + ../include/linux/head.h ../include/linux/fs.h ../include/sys/types.h \ + ../include/linux/mm.h ../include/signal.h ../include/linux/kernel.h \ + ../include/asm/segment.h ../include/asm/system.h +buffer.o : buffer.c ../include/stdarg.h ../include/linux/config.h \ + ../include/linux/sched.h ../include/linux/head.h ../include/linux/fs.h \ + ../include/sys/types.h ../include/linux/mm.h ../include/signal.h \ + ../include/linux/kernel.h ../include/asm/system.h ../include/asm/io.h +char_dev.o : char_dev.c ../include/errno.h ../include/sys/types.h \ + ../include/linux/sched.h ../include/linux/head.h ../include/linux/fs.h \ + ../include/linux/mm.h ../include/signal.h ../include/linux/kernel.h \ + ../include/asm/segment.h ../include/asm/io.h +exec.o : exec.c ../include/errno.h ../include/string.h \ + ../include/sys/stat.h ../include/sys/types.h ../include/a.out.h \ + ../include/linux/fs.h ../include/linux/sched.h ../include/linux/head.h \ + ../include/linux/mm.h ../include/signal.h ../include/linux/kernel.h \ + ../include/asm/segment.h +fcntl.o : fcntl.c ../include/string.h ../include/errno.h \ + ../include/linux/sched.h ../include/linux/head.h ../include/linux/fs.h \ + ../include/sys/types.h ../include/linux/mm.h ../include/signal.h \ + ../include/linux/kernel.h ../include/asm/segment.h ../include/fcntl.h \ + ../include/sys/stat.h +file_dev.o : file_dev.c ../include/errno.h ../include/fcntl.h \ + ../include/sys/types.h ../include/linux/sched.h ../include/linux/head.h \ + ../include/linux/fs.h ../include/linux/mm.h ../include/signal.h \ + ../include/linux/kernel.h ../include/asm/segment.h +file_table.o : file_table.c ../include/linux/fs.h ../include/sys/types.h +inode.o : inode.c ../include/string.h ../include/sys/stat.h \ + ../include/sys/types.h ../include/linux/sched.h ../include/linux/head.h \ + ../include/linux/fs.h ../include/linux/mm.h ../include/signal.h \ + ../include/linux/kernel.h ../include/asm/system.h +ioctl.o : ioctl.c ../include/string.h ../include/errno.h \ + ../include/sys/stat.h ../include/sys/types.h ../include/linux/sched.h \ + ../include/linux/head.h ../include/linux/fs.h ../include/linux/mm.h \ + ../include/signal.h +namei.o : namei.c ../include/linux/sched.h ../include/linux/head.h \ + ../include/linux/fs.h ../include/sys/types.h ../include/linux/mm.h \ + ../include/signal.h ../include/linux/kernel.h ../include/asm/segment.h \ + ../include/string.h ../include/fcntl.h ../include/errno.h \ + ../include/const.h ../include/sys/stat.h +open.o : open.c ../include/string.h ../include/errno.h ../include/fcntl.h \ + ../include/sys/types.h ../include/utime.h ../include/sys/stat.h \ + ../include/linux/sched.h ../include/linux/head.h ../include/linux/fs.h \ + ../include/linux/mm.h ../include/signal.h ../include/linux/tty.h \ + ../include/termios.h ../include/linux/kernel.h ../include/asm/segment.h +pipe.o : pipe.c ../include/signal.h ../include/sys/types.h \ + ../include/linux/sched.h ../include/linux/head.h ../include/linux/fs.h \ + ../include/linux/mm.h ../include/asm/segment.h +read_write.o : read_write.c ../include/sys/stat.h ../include/sys/types.h \ + ../include/errno.h ../include/linux/kernel.h ../include/linux/sched.h \ + ../include/linux/head.h ../include/linux/fs.h ../include/linux/mm.h \ + ../include/signal.h ../include/asm/segment.h +stat.o : stat.c ../include/errno.h ../include/sys/stat.h \ + ../include/sys/types.h ../include/linux/fs.h ../include/linux/sched.h \ + ../include/linux/head.h ../include/linux/mm.h ../include/signal.h \ + ../include/linux/kernel.h ../include/asm/segment.h +super.o : super.c ../include/linux/config.h ../include/linux/sched.h \ + ../include/linux/head.h ../include/linux/fs.h ../include/sys/types.h \ + ../include/linux/mm.h ../include/signal.h ../include/linux/kernel.h \ + ../include/asm/system.h ../include/errno.h ../include/sys/stat.h +truncate.o : truncate.c ../include/linux/sched.h ../include/linux/head.h \ + ../include/linux/fs.h ../include/sys/types.h ../include/linux/mm.h \ + ../include/signal.h ../include/sys/stat.h diff --git a/os/os/linux/fs/bitmap.c b/os/os/linux/fs/bitmap.c new file mode 100644 index 0000000..73951a8 --- /dev/null +++ b/os/os/linux/fs/bitmap.c @@ -0,0 +1,168 @@ +/* + * linux/fs/bitmap.c + * + * (C) 1991 Linus Torvalds + */ + +/* bitmap.c contains the code that handles the inode and block bitmaps */ +#include + +#include +#include + +#define clear_block(addr) \ +__asm__ __volatile__ ("cld\n\t" \ + "rep\n\t" \ + "stosl" \ + ::"a" (0),"c" (BLOCK_SIZE/4),"D" ((long) (addr))) + +#define set_bit(nr,addr) ({\ +register int res __asm__("ax"); \ +__asm__ __volatile__("btsl %2,%3\n\tsetb %%al": \ +"=a" (res):"0" (0),"r" (nr),"m" (*(addr))); \ +res;}) + +#define clear_bit(nr,addr) ({\ +register int res __asm__("ax"); \ +__asm__ __volatile__("btrl %2,%3\n\tsetnb %%al": \ +"=a" (res):"0" (0),"r" (nr),"m" (*(addr))); \ +res;}) + +#define find_first_zero(addr) ({ \ +int __res; \ +__asm__ __volatile__ ("cld\n" \ + "1:\tlodsl\n\t" \ + "notl %%eax\n\t" \ + "bsfl %%eax,%%edx\n\t" \ + "je 2f\n\t" \ + "addl %%edx,%%ecx\n\t" \ + "jmp 3f\n" \ + "2:\taddl $32,%%ecx\n\t" \ + "cmpl $8192,%%ecx\n\t" \ + "jl 1b\n" \ + "3:" \ + :"=c" (__res):"c" (0),"S" (addr)); \ +__res;}) + +void free_block(int dev, int block) +{ + struct super_block * sb; + struct buffer_head * bh; + + if (!(sb = get_super(dev))) + panic("trying to free block on nonexistent device"); + if (block < sb->s_firstdatazone || block >= sb->s_nzones) + panic("trying to free block not in datazone"); + bh = get_hash_table(dev,block); + if (bh) { + if (bh->b_count != 1) { + printk("trying to free block (%04x:%d), count=%d\n", + dev,block,bh->b_count); + return; + } + bh->b_dirt=0; + bh->b_uptodate=0; + brelse(bh); + } + block -= sb->s_firstdatazone - 1 ; + if (clear_bit(block&8191,sb->s_zmap[block/8192]->b_data)) { + printk("block (%04x:%d) ",dev,block+sb->s_firstdatazone-1); + panic("free_block: bit already cleared"); + } + sb->s_zmap[block/8192]->b_dirt = 1; +} + +int new_block(int dev) +{ + struct buffer_head * bh; + struct super_block * sb; + int i,j; + + if (!(sb = get_super(dev))) + panic("trying to get new block from nonexistant device"); + j = 8192; + for (i=0 ; i<8 ; i++) + if (bh=sb->s_zmap[i]) + if ((j=find_first_zero(bh->b_data))<8192) + break; + if (i>=8 || !bh || j>=8192) + return 0; + if (set_bit(j,bh->b_data)) + panic("new_block: bit already set"); + bh->b_dirt = 1; + j += i*8192 + sb->s_firstdatazone-1; + if (j >= sb->s_nzones) + return 0; + if (!(bh=getblk(dev,j))) + panic("new_block: cannot get block"); + if (bh->b_count != 1) + panic("new block: count is != 1"); + clear_block(bh->b_data); + bh->b_uptodate = 1; + bh->b_dirt = 1; + brelse(bh); + return j; +} + +void free_inode(struct m_inode * inode) +{ + struct super_block * sb; + struct buffer_head * bh; + + if (!inode) + return; + if (!inode->i_dev) { + memset(inode,0,sizeof(*inode)); + return; + } + if (inode->i_count>1) { + printk("trying to free inode with count=%d\n",inode->i_count); + panic("free_inode"); + } + if (inode->i_nlinks) + panic("trying to free inode with links"); + if (!(sb = get_super(inode->i_dev))) + panic("trying to free inode on nonexistent device"); + if (inode->i_num < 1 || inode->i_num > sb->s_ninodes) + panic("trying to free inode 0 or nonexistant inode"); + if (!(bh=sb->s_imap[inode->i_num>>13])) + panic("nonexistent imap in superblock"); + if (clear_bit(inode->i_num&8191,bh->b_data)) + printk("free_inode: bit already cleared.\n\r"); + bh->b_dirt = 1; + memset(inode,0,sizeof(*inode)); +} + +struct m_inode * new_inode(int dev) +{ + struct m_inode * inode; + struct super_block * sb; + struct buffer_head * bh; + int i,j; + + if (!(inode=get_empty_inode())) + return NULL; + if (!(sb = get_super(dev))) + panic("new_inode with unknown device"); + j = 8192; + for (i=0 ; i<8 ; i++) + if (bh=sb->s_imap[i]) + if ((j=find_first_zero(bh->b_data))<8192) + break; + if (!bh || j >= 8192 || j+i*8192 > sb->s_ninodes) { + iput(inode); + return NULL; + } + if (set_bit(j,bh->b_data)) + panic("new_inode: bit already set"); + bh->b_dirt = 1; + inode->i_count=1; + inode->i_nlinks=1; + inode->i_dev=dev; + inode->i_uid=current->euid; + inode->i_gid=current->egid; + inode->i_dirt=1; + inode->i_num = j + i*8192; + inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME; + return inode; +} diff --git a/os/os/linux/fs/bitmap.o b/os/os/linux/fs/bitmap.o new file mode 100644 index 0000000..501d3c5 Binary files /dev/null and b/os/os/linux/fs/bitmap.o differ diff --git a/os/os/linux/fs/block_dev.c b/os/os/linux/fs/block_dev.c new file mode 100644 index 0000000..a50ae3f --- /dev/null +++ b/os/os/linux/fs/block_dev.c @@ -0,0 +1,73 @@ +/* + * linux/fs/block_dev.c + * + * (C) 1991 Linus Torvalds + */ + +#include + +#include +#include +#include +#include + +int block_write(int dev, long * pos, char * buf, int count) +{ + int block = *pos >> BLOCK_SIZE_BITS; + int offset = *pos & (BLOCK_SIZE-1); + int chars; + int written = 0; + struct buffer_head * bh; + register char * p; + + while (count>0) { + chars = BLOCK_SIZE - offset; + if (chars > count) + chars=count; + if (chars == BLOCK_SIZE) + bh = getblk(dev,block); + else + bh = breada(dev,block,block+1,block+2,-1); + block++; + if (!bh) + return written?written:-EIO; + p = offset + bh->b_data; + offset = 0; + *pos += chars; + written += chars; + count -= chars; + while (chars-->0) + *(p++) = get_fs_byte(buf++); + bh->b_dirt = 1; + brelse(bh); + } + return written; +} + +int block_read(int dev, unsigned long * pos, char * buf, int count) +{ + int block = *pos >> BLOCK_SIZE_BITS; + int offset = *pos & (BLOCK_SIZE-1); + int chars; + int read = 0; + struct buffer_head * bh; + register char * p; + + while (count>0) { + chars = BLOCK_SIZE-offset; + if (chars > count) + chars = count; + if (!(bh = breada(dev,block,block+1,block+2,-1))) + return read?read:-EIO; + block++; + p = offset + bh->b_data; + offset = 0; + *pos += chars; + read += chars; + count -= chars; + while (chars-->0) + put_fs_byte(*(p++),buf++); + brelse(bh); + } + return read; +} diff --git a/os/os/linux/fs/block_dev.o b/os/os/linux/fs/block_dev.o new file mode 100644 index 0000000..e5e9334 Binary files /dev/null and b/os/os/linux/fs/block_dev.o differ diff --git a/os/os/linux/fs/buffer.c b/os/os/linux/fs/buffer.c new file mode 100644 index 0000000..a6643aa --- /dev/null +++ b/os/os/linux/fs/buffer.c @@ -0,0 +1,384 @@ +/* + * linux/fs/buffer.c + * + * (C) 1991 Linus Torvalds + */ + +/* + * 'buffer.c' implements the buffer-cache functions. Race-conditions have + * been avoided by NEVER letting a interrupt change a buffer (except for the + * data, of course), but instead letting the caller do it. NOTE! As interrupts + * can wake up a caller, some cli-sti sequences are needed to check for + * sleep-on-calls. These should be extremely quick, though (I hope). + */ + +/* + * NOTE! There is one discordant note here: checking floppies for + * disk change. This is where it fits best, I think, as it should + * invalidate changed floppy-disk-caches. + */ + +#include + +#include +#include +#include +#include +#include + +extern void put_super(int dev); +extern void invalidate_inodes(int dev); + +extern int end; +struct buffer_head * start_buffer = (struct buffer_head *) &end; +struct buffer_head * hash_table[NR_HASH]; +static struct buffer_head * free_list; +static struct task_struct * buffer_wait = NULL; +int NR_BUFFERS = 0; + +static inline void wait_on_buffer(struct buffer_head * bh) +{ + cli(); + while (bh->b_lock) + sleep_on(&bh->b_wait); + sti(); +} + +int sys_sync(void) +{ + int i; + struct buffer_head * bh; + + sync_inodes(); /* write out inodes into buffers */ + bh = start_buffer; + for (i=0 ; ib_dirt) + ll_rw_block(WRITE,bh); + } + return 0; +} + +int sync_dev(int dev) +{ + int i; + struct buffer_head * bh; + + bh = start_buffer; + for (i=0 ; ib_dev != dev) + continue; + wait_on_buffer(bh); + if (bh->b_dev == dev && bh->b_dirt) + ll_rw_block(WRITE,bh); + } + sync_inodes(); + bh = start_buffer; + for (i=0 ; ib_dev != dev) + continue; + wait_on_buffer(bh); + if (bh->b_dev == dev && bh->b_dirt) + ll_rw_block(WRITE,bh); + } + return 0; +} + +void inline invalidate_buffers(int dev) +{ + int i; + struct buffer_head * bh; + + bh = start_buffer; + for (i=0 ; ib_dev != dev) + continue; + wait_on_buffer(bh); + if (bh->b_dev == dev) + bh->b_uptodate = bh->b_dirt = 0; + } +} + +/* + * This routine checks whether a floppy has been changed, and + * invalidates all buffer-cache-entries in that case. This + * is a relatively slow routine, so we have to try to minimize using + * it. Thus it is called only upon a 'mount' or 'open'. This + * is the best way of combining speed and utility, I think. + * People changing diskettes in the middle of an operation deserve + * to loose :-) + * + * NOTE! Although currently this is only for floppies, the idea is + * that any additional removable block-device will use this routine, + * and that mount/open needn't know that floppies/whatever are + * special. + */ +void check_disk_change(int dev) +{ + int i; + + if (MAJOR(dev) != 2) + return; + if (!floppy_change(dev & 0x03)) + return; + for (i=0 ; ib_next) + bh->b_next->b_prev = bh->b_prev; + if (bh->b_prev) + bh->b_prev->b_next = bh->b_next; + if (hash(bh->b_dev,bh->b_blocknr) == bh) + hash(bh->b_dev,bh->b_blocknr) = bh->b_next; +/* remove from free list */ + if (!(bh->b_prev_free) || !(bh->b_next_free)) + panic("Free block list corrupted"); + bh->b_prev_free->b_next_free = bh->b_next_free; + bh->b_next_free->b_prev_free = bh->b_prev_free; + if (free_list == bh) + free_list = bh->b_next_free; +} + +static inline void insert_into_queues(struct buffer_head * bh) +{ +/* put at end of free list */ + bh->b_next_free = free_list; + bh->b_prev_free = free_list->b_prev_free; + free_list->b_prev_free->b_next_free = bh; + free_list->b_prev_free = bh; +/* put the buffer in new hash-queue if it has a device */ + bh->b_prev = NULL; + bh->b_next = NULL; + if (!bh->b_dev) + return; + bh->b_next = hash(bh->b_dev,bh->b_blocknr); + hash(bh->b_dev,bh->b_blocknr) = bh; + bh->b_next->b_prev = bh; +} + +static struct buffer_head * find_buffer(int dev, int block) +{ + struct buffer_head * tmp; + + for (tmp = hash(dev,block) ; tmp != NULL ; tmp = tmp->b_next) + if (tmp->b_dev==dev && tmp->b_blocknr==block) + return tmp; + return NULL; +} + +/* + * Why like this, I hear you say... The reason is race-conditions. + * As we don't lock buffers (unless we are readint them, that is), + * something might happen to it while we sleep (ie a read-error + * will force it bad). This shouldn't really happen currently, but + * the code is ready. + */ +struct buffer_head * get_hash_table(int dev, int block) +{ + struct buffer_head * bh; + + for (;;) { + if (!(bh=find_buffer(dev,block))) + return NULL; + bh->b_count++; + wait_on_buffer(bh); + if (bh->b_dev == dev && bh->b_blocknr == block) + return bh; + bh->b_count--; + } +} + +/* + * Ok, this is getblk, and it isn't very clear, again to hinder + * race-conditions. Most of the code is seldom used, (ie repeating), + * so it should be much more efficient than it looks. + * + * The algoritm is changed: hopefully better, and an elusive bug removed. + */ +#define BADNESS(bh) (((bh)->b_dirt<<1)+(bh)->b_lock) +struct buffer_head * getblk(int dev,int block) +{ + struct buffer_head * tmp, * bh; + +repeat: + if (bh = get_hash_table(dev,block)) + return bh; + tmp = free_list; + do { + if (tmp->b_count) + continue; + if (!bh || BADNESS(tmp)b_next_free) != free_list); + if (!bh) { + sleep_on(&buffer_wait); + goto repeat; + } + wait_on_buffer(bh); + if (bh->b_count) + goto repeat; + while (bh->b_dirt) { + sync_dev(bh->b_dev); + wait_on_buffer(bh); + if (bh->b_count) + goto repeat; + } +/* NOTE!! While we slept waiting for this block, somebody else might */ +/* already have added "this" block to the cache. check it */ + if (find_buffer(dev,block)) + goto repeat; +/* OK, FINALLY we know that this buffer is the only one of it's kind, */ +/* and that it's unused (b_count=0), unlocked (b_lock=0), and clean */ + bh->b_count=1; + bh->b_dirt=0; + bh->b_uptodate=0; + remove_from_queues(bh); + bh->b_dev=dev; + bh->b_blocknr=block; + insert_into_queues(bh); + return bh; +} + +void brelse(struct buffer_head * buf) +{ + if (!buf) + return; + wait_on_buffer(buf); + if (!(buf->b_count--)) + panic("Trying to free free buffer"); + wake_up(&buffer_wait); +} + +/* + * bread() reads a specified block and returns the buffer that contains + * it. It returns NULL if the block was unreadable. + */ +struct buffer_head * bread(int dev,int block) +{ + struct buffer_head * bh; + + if (!(bh=getblk(dev,block))) + panic("bread: getblk returned NULL\n"); + if (bh->b_uptodate) + return bh; + ll_rw_block(READ,bh); + wait_on_buffer(bh); + if (bh->b_uptodate) + return bh; + brelse(bh); + return NULL; +} + +#define COPYBLK(from,to) \ +__asm__("cld\n\t" \ + "rep\n\t" \ + "movsl\n\t" \ + ::"c" (BLOCK_SIZE/4),"S" (from),"D" (to) \ + ) + +/* + * bread_page reads four buffers into memory at the desired address. It's + * a function of its own, as there is some speed to be got by reading them + * all at the same time, not waiting for one to be read, and then another + * etc. + */ +void bread_page(unsigned long address,int dev,int b[4]) +{ + struct buffer_head * bh[4]; + int i; + + for (i=0 ; i<4 ; i++) + if (b[i]) { + if (bh[i] = getblk(dev,b[i])) + if (!bh[i]->b_uptodate) + ll_rw_block(READ,bh[i]); + } else + bh[i] = NULL; + for (i=0 ; i<4 ; i++,address += BLOCK_SIZE) + if (bh[i]) { + wait_on_buffer(bh[i]); + if (bh[i]->b_uptodate) + COPYBLK((unsigned long) bh[i]->b_data,address); + brelse(bh[i]); + } +} + +/* + * Ok, breada can be used as bread, but additionally to mark other + * blocks for reading as well. End the argument list with a negative + * number. + */ +struct buffer_head * breada(int dev,int first, ...) +{ + va_list args; + struct buffer_head * bh, *tmp; + + va_start(args,first); + if (!(bh=getblk(dev,first))) + panic("bread: getblk returned NULL\n"); + if (!bh->b_uptodate) + ll_rw_block(READ,bh); + while ((first=va_arg(args,int))>=0) { + tmp=getblk(dev,first); + if (tmp) { + if (!tmp->b_uptodate) + ll_rw_block(READA,bh); + tmp->b_count--; + } + } + va_end(args); + wait_on_buffer(bh); + if (bh->b_uptodate) + return bh; + brelse(bh); + return (NULL); +} + +void buffer_init(long buffer_end) +{ + struct buffer_head * h = start_buffer; + void * b; + int i; + + if (buffer_end == 1<<20) + b = (void *) (640*1024); + else + b = (void *) buffer_end; + while ( (b -= BLOCK_SIZE) >= ((void *) (h+1)) ) { + h->b_dev = 0; + h->b_dirt = 0; + h->b_count = 0; + h->b_lock = 0; + h->b_uptodate = 0; + h->b_wait = NULL; + h->b_next = NULL; + h->b_prev = NULL; + h->b_data = (char *) b; + h->b_prev_free = h-1; + h->b_next_free = h+1; + h++; + NR_BUFFERS++; + if (b == (void *) 0x100000) + b = (void *) 0xA0000; + } + h--; + free_list = start_buffer; + free_list->b_prev_free = h; + h->b_next_free = free_list; + for (i=0;i +#include + +#include +#include + +#include +#include + +extern int tty_read(unsigned minor,char * buf,int count); +extern int tty_write(unsigned minor,char * buf,int count); + +typedef (*crw_ptr)(int rw,unsigned minor,char * buf,int count,off_t * pos); + +static int rw_ttyx(int rw,unsigned minor,char * buf,int count,off_t * pos) +{ + return ((rw==READ)?tty_read(minor,buf,count): + tty_write(minor,buf,count)); +} + +static int rw_tty(int rw,unsigned minor,char * buf,int count, off_t * pos) +{ + if (current->tty<0) + return -EPERM; + return rw_ttyx(rw,current->tty,buf,count,pos); +} + +static int rw_ram(int rw,char * buf, int count, off_t *pos) +{ + return -EIO; +} + +static int rw_mem(int rw,char * buf, int count, off_t * pos) +{ + return -EIO; +} + +static int rw_kmem(int rw,char * buf, int count, off_t * pos) +{ + return -EIO; +} + +static int rw_port(int rw,char * buf, int count, off_t * pos) +{ + int i=*pos; + + while (count-->0 && i<65536) { + if (rw==READ) + put_fs_byte(inb(i),buf++); + else + outb(get_fs_byte(buf++),i); + i++; + } + i -= *pos; + *pos += i; + return i; +} + +static int rw_memory(int rw, unsigned minor, char * buf, int count, off_t * pos) +{ + switch(minor) { + case 0: + return rw_ram(rw,buf,count,pos); + case 1: + return rw_mem(rw,buf,count,pos); + case 2: + return rw_kmem(rw,buf,count,pos); + case 3: + return (rw==READ)?0:count; /* rw_null */ + case 4: + return rw_port(rw,buf,count,pos); + default: + return -EIO; + } +} + +#define NRDEVS ((sizeof (crw_table))/(sizeof (crw_ptr))) + +static crw_ptr crw_table[]={ + NULL, /* nodev */ + rw_memory, /* /dev/mem etc */ + NULL, /* /dev/fd */ + NULL, /* /dev/hd */ + rw_ttyx, /* /dev/ttyx */ + rw_tty, /* /dev/tty */ + NULL, /* /dev/lp */ + NULL}; /* unnamed pipes */ + +int rw_char(int rw,int dev, char * buf, int count, off_t * pos) +{ + crw_ptr call_addr; + + if (MAJOR(dev)>=NRDEVS) + return -ENODEV; + if (!(call_addr=crw_table[MAJOR(dev)])) + return -ENODEV; + return call_addr(rw,MINOR(dev),buf,count,pos); +} diff --git a/os/os/linux/fs/char_dev.o b/os/os/linux/fs/char_dev.o new file mode 100644 index 0000000..2977060 Binary files /dev/null and b/os/os/linux/fs/char_dev.o differ diff --git a/os/os/linux/fs/exec.c b/os/os/linux/fs/exec.c new file mode 100644 index 0000000..2ff220e --- /dev/null +++ b/os/os/linux/fs/exec.c @@ -0,0 +1,359 @@ +/* + * linux/fs/exec.c + * + * (C) 1991 Linus Torvalds + */ + +/* + * #!-checking implemented by tytso. + */ + +/* + * Demand-loading implemented 01.12.91 - no need to read anything but + * the header into memory. The inode of the executable is put into + * "current->executable", and page faults do the actual loading. Clean. + * + * Once more I can proudly say that linux stood up to being changed: it + * was less than 2 hours work to get demand-loading completely implemented. + */ + +#include +#include +#include +#include + +#include +#include +#include +#include +#include + +extern int sys_exit(int exit_code); +extern int sys_close(int fd); + +/* + * MAX_ARG_PAGES defines the number of pages allocated for arguments + * and envelope for the new program. 32 should suffice, this gives + * a maximum env+arg of 128kB ! + */ +#define MAX_ARG_PAGES 32 + + +int sys_uselib() +{ + return -ENOSYS; +} + +/* + * create_tables() parses the env- and arg-strings in new user + * memory and creates the pointer tables from them, and puts their + * addresses on the "stack", returning the new stack pointer value. + */ +static unsigned long * create_tables(char * p,int argc,int envc) +{ + unsigned long *argv,*envp; + unsigned long * sp; + + sp = (unsigned long *) (0xfffffffc & (unsigned long) p); + sp -= envc+1; + envp = sp; + sp -= argc+1; + argv = sp; + put_fs_long((unsigned long)envp,--sp); + put_fs_long((unsigned long)argv,--sp); + put_fs_long((unsigned long)argc,--sp); + while (argc-->0) { + put_fs_long((unsigned long) p,argv++); + while (get_fs_byte(p++)) /* nothing */ ; + } + put_fs_long(0,argv); + while (envc-->0) { + put_fs_long((unsigned long) p,envp++); + while (get_fs_byte(p++)) /* nothing */ ; + } + put_fs_long(0,envp); + return sp; +} + +/* + * count() counts the number of arguments/envelopes + */ +static int count(char ** argv) +{ + int i=0; + char ** tmp; + + if (tmp = argv) + while (get_fs_long((unsigned long *) (tmp++))) + i++; + + return i; +} + +/* + * 'copy_string()' copies argument/envelope strings from user + * memory to free pages in kernel mem. These are in a format ready + * to be put directly into the top of new user memory. + * + * Modified by TYT, 11/24/91 to add the from_kmem argument, which specifies + * whether the string and the string array are from user or kernel segments: + * + * from_kmem argv * argv ** + * 0 user space user space + * 1 kernel space user space + * 2 kernel space kernel space + * + * We do this by playing games with the fs segment register. Since it + * it is expensive to load a segment register, we try to avoid calling + * set_fs() unless we absolutely have to. + */ +static unsigned long copy_strings(int argc,char ** argv,unsigned long *page, + unsigned long p, int from_kmem) +{ + char *tmp, *pag; + int len, offset = 0; + unsigned long old_fs, new_fs; + + if (!p) + return 0; /* bullet-proofing */ + new_fs = get_ds(); + old_fs = get_fs(); + if (from_kmem==2) + set_fs(new_fs); + while (argc-- > 0) { + if (from_kmem == 1) + set_fs(new_fs); + if (!(tmp = (char *)get_fs_long(((unsigned long *)argv)+argc))) + panic("argc is wrong"); + if (from_kmem == 1) + set_fs(old_fs); + len=0; /* remember zero-padding */ + do { + len++; + } while (get_fs_byte(tmp++)); + if (p-len < 0) { /* this shouldn't happen - 128kB */ + set_fs(old_fs); + return 0; + } + while (len) { + --p; --tmp; --len; + if (--offset < 0) { + offset = p % PAGE_SIZE; + if (from_kmem==2) + set_fs(old_fs); + if (!(pag = (char *) page[p/PAGE_SIZE]) && + !(pag = (char *) (page[p/PAGE_SIZE] = + (unsigned long *) get_free_page()))) + return 0; + if (from_kmem==2) + set_fs(new_fs); + + } + *(pag + offset) = get_fs_byte(tmp); + } + } + if (from_kmem==2) + set_fs(old_fs); + return p; +} + +static unsigned long change_ldt(unsigned long text_size,unsigned long * page) +{ + unsigned long code_limit,data_limit,code_base,data_base; + int i; + + code_limit = text_size+PAGE_SIZE -1; + code_limit &= 0xFFFFF000; + data_limit = 0x4000000; + code_base = get_base(current->ldt[1]); + data_base = code_base; + set_base(current->ldt[1],code_base); + set_limit(current->ldt[1],code_limit); + set_base(current->ldt[2],data_base); + set_limit(current->ldt[2],data_limit); +/* make sure fs points to the NEW data segment */ + __asm__("pushl $0x17\n\tpop %%fs"::); + data_base += data_limit; + for (i=MAX_ARG_PAGES-1 ; i>=0 ; i--) { + data_base -= PAGE_SIZE; + if (page[i]) + put_page(page[i],data_base); + } + return data_limit; +} + +/* + * 'do_execve()' executes a new program. + */ +int do_execve(unsigned long * eip,long tmp,char * filename, + char ** argv, char ** envp) +{ + struct m_inode * inode; + struct buffer_head * bh; + struct exec ex; + unsigned long page[MAX_ARG_PAGES]; + int i,argc,envc; + int e_uid, e_gid; + int retval; + int sh_bang = 0; + unsigned long p=PAGE_SIZE*MAX_ARG_PAGES-4; + + if ((0xffff & eip[1]) != 0x000f) + panic("execve called from supervisor mode"); + for (i=0 ; ii_mode)) { /* must be regular file */ + retval = -EACCES; + goto exec_error2; + } + i = inode->i_mode; + e_uid = (i & S_ISUID) ? inode->i_uid : current->euid; + e_gid = (i & S_ISGID) ? inode->i_gid : current->egid; + if (current->euid == inode->i_uid) + i >>= 6; + else if (current->egid == inode->i_gid) + i >>= 3; + if (!(i & 1) && + !((inode->i_mode & 0111) && suser())) { + retval = -ENOEXEC; + goto exec_error2; + } + if (!(bh = bread(inode->i_dev,inode->i_zone[0]))) { + retval = -EACCES; + goto exec_error2; + } + ex = *((struct exec *) bh->b_data); /* read exec-header */ + if ((bh->b_data[0] == '#') && (bh->b_data[1] == '!') && (!sh_bang)) { + /* + * This section does the #! interpretation. + * Sorta complicated, but hopefully it will work. -TYT + */ + + char buf[1023], *cp, *interp, *i_name, *i_arg; + unsigned long old_fs; + + strncpy(buf, bh->b_data+2, 1022); + brelse(bh); + iput(inode); + buf[1022] = '\0'; + if (cp = strchr(buf, '\n')) { + *cp = '\0'; + for (cp = buf; (*cp == ' ') || (*cp == '\t'); cp++); + } + if (!cp || *cp == '\0') { + retval = -ENOEXEC; /* No interpreter name found */ + goto exec_error1; + } + interp = i_name = cp; + i_arg = 0; + for ( ; *cp && (*cp != ' ') && (*cp != '\t'); cp++) { + if (*cp == '/') + i_name = cp+1; + } + if (*cp) { + *cp++ = '\0'; + i_arg = cp; + } + /* + * OK, we've parsed out the interpreter name and + * (optional) argument. + */ + if (sh_bang++ == 0) { + p = copy_strings(envc, envp, page, p, 0); + p = copy_strings(--argc, argv+1, page, p, 0); + } + /* + * Splice in (1) the interpreter's name for argv[0] + * (2) (optional) argument to interpreter + * (3) filename of shell script + * + * This is done in reverse order, because of how the + * user environment and arguments are stored. + */ + p = copy_strings(1, &filename, page, p, 1); + argc++; + if (i_arg) { + p = copy_strings(1, &i_arg, page, p, 2); + argc++; + } + p = copy_strings(1, &i_name, page, p, 2); + argc++; + if (!p) { + retval = -ENOMEM; + goto exec_error1; + } + /* + * OK, now restart the process with the interpreter's inode. + */ + old_fs = get_fs(); + set_fs(get_ds()); + if (!(inode=namei(interp))) { /* get executables inode */ + set_fs(old_fs); + retval = -ENOENT; + goto exec_error1; + } + set_fs(old_fs); + goto restart_interp; + } + brelse(bh); + if (N_MAGIC(ex) != ZMAGIC || ex.a_trsize || ex.a_drsize || + ex.a_text+ex.a_data+ex.a_bss>0x3000000 || + inode->i_size < ex.a_text+ex.a_data+ex.a_syms+N_TXTOFF(ex)) { + retval = -ENOEXEC; + goto exec_error2; + } + if (N_TXTOFF(ex) != BLOCK_SIZE) { + printk("%s: N_TXTOFF != BLOCK_SIZE. See a.out.h.", filename); + retval = -ENOEXEC; + goto exec_error2; + } + if (!sh_bang) { + p = copy_strings(envc,envp,page,p,0); + p = copy_strings(argc,argv,page,p,0); + if (!p) { + retval = -ENOMEM; + goto exec_error2; + } + } +/* OK, This is the point of no return */ + if (current->executable) + iput(current->executable); + current->executable = inode; + for (i=0 ; i<32 ; i++) + current->sigaction[i].sa_handler = NULL; + for (i=0 ; iclose_on_exec>>i)&1) + sys_close(i); + current->close_on_exec = 0; + free_page_tables(get_base(current->ldt[1]),get_limit(0x0f)); + free_page_tables(get_base(current->ldt[2]),get_limit(0x17)); + if (last_task_used_math == current) + last_task_used_math = NULL; + current->used_math = 0; + p += change_ldt(ex.a_text,page)-MAX_ARG_PAGES*PAGE_SIZE; + p = (unsigned long) create_tables((char *)p,argc,envc); + current->brk = ex.a_bss + + (current->end_data = ex.a_data + + (current->end_code = ex.a_text)); + current->start_stack = p & 0xfffff000; + current->euid = e_uid; + current->egid = e_gid; + i = ex.a_text+ex.a_data; + while (i&0xfff) + put_fs_byte(0,(char *) (i++)); + eip[0] = ex.a_entry; /* eip, magic happens :-) */ + eip[3] = p; /* stack pointer */ + return 0; +exec_error2: + iput(inode); +exec_error1: + for (i=0 ; i +#include +#include +#include +#include + +#include +#include + +extern int sys_close(int fd); + +static int dupfd(unsigned int fd, unsigned int arg) +{ + if (fd >= NR_OPEN || !current->filp[fd]) + return -EBADF; + if (arg >= NR_OPEN) + return -EINVAL; + while (arg < NR_OPEN) + if (current->filp[arg]) + arg++; + else + break; + if (arg >= NR_OPEN) + return -EMFILE; + current->close_on_exec &= ~(1<filp[arg] = current->filp[fd])->f_count++; + return arg; +} + +int sys_dup2(unsigned int oldfd, unsigned int newfd) +{ + sys_close(newfd); + return dupfd(oldfd,newfd); +} + +int sys_dup(unsigned int fildes) +{ + return dupfd(fildes,0); +} + +int sys_fcntl(unsigned int fd, unsigned int cmd, unsigned long arg) +{ + struct file * filp; + + if (fd >= NR_OPEN || !(filp = current->filp[fd])) + return -EBADF; + switch (cmd) { + case F_DUPFD: + return dupfd(fd,arg); + case F_GETFD: + return (current->close_on_exec>>fd)&1; + case F_SETFD: + if (arg&1) + current->close_on_exec |= (1<close_on_exec &= ~(1<f_flags; + case F_SETFL: + filp->f_flags &= ~(O_APPEND | O_NONBLOCK); + filp->f_flags |= arg & (O_APPEND | O_NONBLOCK); + return 0; + case F_GETLK: case F_SETLK: case F_SETLKW: + return -1; + default: + return -1; + } +} diff --git a/os/os/linux/fs/fcntl.o b/os/os/linux/fs/fcntl.o new file mode 100644 index 0000000..17a6eca Binary files /dev/null and b/os/os/linux/fs/fcntl.o differ diff --git a/os/os/linux/fs/file_dev.c b/os/os/linux/fs/file_dev.c new file mode 100644 index 0000000..0c50eaa --- /dev/null +++ b/os/os/linux/fs/file_dev.c @@ -0,0 +1,90 @@ +/* + * linux/fs/file_dev.c + * + * (C) 1991 Linus Torvalds + */ + +#include +#include + +#include +#include +#include + +#define MIN(a,b) (((a)<(b))?(a):(b)) +#define MAX(a,b) (((a)>(b))?(a):(b)) + +int file_read(struct m_inode * inode, struct file * filp, char * buf, int count) +{ + int left,chars,nr; + struct buffer_head * bh; + + if ((left=count)<=0) + return 0; + while (left) { + if (nr = bmap(inode,(filp->f_pos)/BLOCK_SIZE)) { + if (!(bh=bread(inode->i_dev,nr))) + break; + } else + bh = NULL; + nr = filp->f_pos % BLOCK_SIZE; + chars = MIN( BLOCK_SIZE-nr , left ); + filp->f_pos += chars; + left -= chars; + if (bh) { + char * p = nr + bh->b_data; + while (chars-->0) + put_fs_byte(*(p++),buf++); + brelse(bh); + } else { + while (chars-->0) + put_fs_byte(0,buf++); + } + } + inode->i_atime = CURRENT_TIME; + return (count-left)?(count-left):-ERROR; +} + +int file_write(struct m_inode * inode, struct file * filp, char * buf, int count) +{ + off_t pos; + int block,c; + struct buffer_head * bh; + char * p; + int i=0; + +/* + * ok, append may not work when many processes are writing at the same time + * but so what. That way leads to madness anyway. + */ + if (filp->f_flags & O_APPEND) + pos = inode->i_size; + else + pos = filp->f_pos; + while (ii_dev,block))) + break; + c = pos % BLOCK_SIZE; + p = c + bh->b_data; + bh->b_dirt = 1; + c = BLOCK_SIZE-c; + if (c > count-i) c = count-i; + pos += c; + if (pos > inode->i_size) { + inode->i_size = pos; + inode->i_dirt = 1; + } + i += c; + while (c-->0) + *(p++) = get_fs_byte(buf++); + brelse(bh); + } + inode->i_mtime = CURRENT_TIME; + if (!(filp->f_flags & O_APPEND)) { + filp->f_pos = pos; + inode->i_ctime = CURRENT_TIME; + } + return (i?i:-1); +} diff --git a/os/os/linux/fs/file_dev.o b/os/os/linux/fs/file_dev.o new file mode 100644 index 0000000..e1ba8a5 Binary files /dev/null and b/os/os/linux/fs/file_dev.o differ diff --git a/os/os/linux/fs/file_table.c b/os/os/linux/fs/file_table.c new file mode 100644 index 0000000..e0589ac --- /dev/null +++ b/os/os/linux/fs/file_table.c @@ -0,0 +1,9 @@ +/* + * linux/fs/file_table.c + * + * (C) 1991 Linus Torvalds + */ + +#include + +struct file file_table[NR_FILE]; diff --git a/os/os/linux/fs/file_table.o b/os/os/linux/fs/file_table.o new file mode 100644 index 0000000..422bcb3 Binary files /dev/null and b/os/os/linux/fs/file_table.o differ diff --git a/os/os/linux/fs/fs.o b/os/os/linux/fs/fs.o new file mode 100644 index 0000000..2349695 Binary files /dev/null and b/os/os/linux/fs/fs.o differ diff --git a/os/os/linux/fs/inode.c b/os/os/linux/fs/inode.c new file mode 100644 index 0000000..9bb10b3 --- /dev/null +++ b/os/os/linux/fs/inode.c @@ -0,0 +1,340 @@ +/* + * linux/fs/inode.c + * + * (C) 1991 Linus Torvalds + */ + +#include +#include + +#include +#include +#include +#include + +struct m_inode inode_table[NR_INODE]={{0,},}; + +static void read_inode(struct m_inode * inode); +static void write_inode(struct m_inode * inode); + +static inline void wait_on_inode(struct m_inode * inode) +{ + cli(); + while (inode->i_lock) + sleep_on(&inode->i_wait); + sti(); +} + +static inline void lock_inode(struct m_inode * inode) +{ + cli(); + while (inode->i_lock) + sleep_on(&inode->i_wait); + inode->i_lock=1; + sti(); +} + +static inline void unlock_inode(struct m_inode * inode) +{ + inode->i_lock=0; + wake_up(&inode->i_wait); +} + +void invalidate_inodes(int dev) +{ + int i; + struct m_inode * inode; + + inode = 0+inode_table; + for(i=0 ; ii_dev == dev) { + if (inode->i_count) + printk("inode in use on removed disk\n\r"); + inode->i_dev = inode->i_dirt = 0; + } + } +} + +void sync_inodes(void) +{ + int i; + struct m_inode * inode; + + inode = 0+inode_table; + for(i=0 ; ii_dirt && !inode->i_pipe) + write_inode(inode); + } +} + +static int _bmap(struct m_inode * inode,int block,int create) +{ + struct buffer_head * bh; + int i; + + if (block<0) + panic("_bmap: block<0"); + if (block >= 7+512+512*512) + panic("_bmap: block>big"); + if (block<7) { + if (create && !inode->i_zone[block]) + if (inode->i_zone[block]=new_block(inode->i_dev)) { + inode->i_ctime=CURRENT_TIME; + inode->i_dirt=1; + } + return inode->i_zone[block]; + } + block -= 7; + if (block<512) { + if (create && !inode->i_zone[7]) + if (inode->i_zone[7]=new_block(inode->i_dev)) { + inode->i_dirt=1; + inode->i_ctime=CURRENT_TIME; + } + if (!inode->i_zone[7]) + return 0; + if (!(bh = bread(inode->i_dev,inode->i_zone[7]))) + return 0; + i = ((unsigned short *) (bh->b_data))[block]; + if (create && !i) + if (i=new_block(inode->i_dev)) { + ((unsigned short *) (bh->b_data))[block]=i; + bh->b_dirt=1; + } + brelse(bh); + return i; + } + block -= 512; + if (create && !inode->i_zone[8]) + if (inode->i_zone[8]=new_block(inode->i_dev)) { + inode->i_dirt=1; + inode->i_ctime=CURRENT_TIME; + } + if (!inode->i_zone[8]) + return 0; + if (!(bh=bread(inode->i_dev,inode->i_zone[8]))) + return 0; + i = ((unsigned short *)bh->b_data)[block>>9]; + if (create && !i) + if (i=new_block(inode->i_dev)) { + ((unsigned short *) (bh->b_data))[block>>9]=i; + bh->b_dirt=1; + } + brelse(bh); + if (!i) + return 0; + if (!(bh=bread(inode->i_dev,i))) + return 0; + i = ((unsigned short *)bh->b_data)[block&511]; + if (create && !i) + if (i=new_block(inode->i_dev)) { + ((unsigned short *) (bh->b_data))[block&511]=i; + bh->b_dirt=1; + } + brelse(bh); + return i; +} + +int bmap(struct m_inode * inode,int block) +{ + return _bmap(inode,block,0); +} + +int create_block(struct m_inode * inode, int block) +{ + return _bmap(inode,block,1); +} + +void iput(struct m_inode * inode) +{ + if (!inode) + return; + wait_on_inode(inode); + if (!inode->i_count) + panic("iput: trying to free free inode"); + if (inode->i_pipe) { + wake_up(&inode->i_wait); + if (--inode->i_count) + return; + free_page(inode->i_size); + inode->i_count=0; + inode->i_dirt=0; + inode->i_pipe=0; + return; + } + if (!inode->i_dev) { + inode->i_count--; + return; + } + if (S_ISBLK(inode->i_mode)) { + sync_dev(inode->i_zone[0]); + wait_on_inode(inode); + } +repeat: + if (inode->i_count>1) { + inode->i_count--; + return; + } + if (!inode->i_nlinks) { + truncate(inode); + free_inode(inode); + return; + } + if (inode->i_dirt) { + write_inode(inode); /* we can sleep - so do again */ + wait_on_inode(inode); + goto repeat; + } + inode->i_count--; + return; +} + +struct m_inode * get_empty_inode(void) +{ + struct m_inode * inode; + static struct m_inode * last_inode = inode_table; + int i; + + do { + inode = NULL; + for (i = NR_INODE; i ; i--) { + if (++last_inode >= inode_table + NR_INODE) + last_inode = inode_table; + if (!last_inode->i_count) { + inode = last_inode; + if (!inode->i_dirt && !inode->i_lock) + break; + } + } + if (!inode) { + for (i=0 ; ii_dirt) { + write_inode(inode); + wait_on_inode(inode); + } + } while (inode->i_count); + memset(inode,0,sizeof(*inode)); + inode->i_count = 1; + return inode; +} + +struct m_inode * get_pipe_inode(void) +{ + struct m_inode * inode; + + if (!(inode = get_empty_inode())) + return NULL; + if (!(inode->i_size=get_free_page())) { + inode->i_count = 0; + return NULL; + } + inode->i_count = 2; /* sum of readers/writers */ + PIPE_HEAD(*inode) = PIPE_TAIL(*inode) = 0; + inode->i_pipe = 1; + return inode; +} + +struct m_inode * iget(int dev,int nr) +{ + struct m_inode * inode, * empty; + + if (!dev) + panic("iget with dev==0"); + empty = get_empty_inode(); + inode = inode_table; + while (inode < NR_INODE+inode_table) { + if (inode->i_dev != dev || inode->i_num != nr) { + inode++; + continue; + } + wait_on_inode(inode); + if (inode->i_dev != dev || inode->i_num != nr) { + inode = inode_table; + continue; + } + inode->i_count++; + if (inode->i_mount) { + int i; + + for (i = 0 ; i= NR_SUPER) { + printk("Mounted inode hasn't got sb\n"); + if (empty) + iput(empty); + return inode; + } + iput(inode); + dev = super_block[i].s_dev; + nr = ROOT_INO; + inode = inode_table; + continue; + } + if (empty) + iput(empty); + return inode; + } + if (!empty) + return (NULL); + inode=empty; + inode->i_dev = dev; + inode->i_num = nr; + read_inode(inode); + return inode; +} + +static void read_inode(struct m_inode * inode) +{ + struct super_block * sb; + struct buffer_head * bh; + int block; + + lock_inode(inode); + if (!(sb=get_super(inode->i_dev))) + panic("trying to read inode without dev"); + block = 2 + sb->s_imap_blocks + sb->s_zmap_blocks + + (inode->i_num-1)/INODES_PER_BLOCK; + if (!(bh=bread(inode->i_dev,block))) + panic("unable to read i-node block"); + __asm__ volatile ("cld"); /* by wyj */ + *(struct d_inode *)inode = + ((struct d_inode *)bh->b_data) + [(inode->i_num-1)%INODES_PER_BLOCK]; + brelse(bh); + unlock_inode(inode); +} + +static void write_inode(struct m_inode * inode) +{ + struct super_block * sb; + struct buffer_head * bh; + int block; + + lock_inode(inode); + if (!inode->i_dirt || !inode->i_dev) { + unlock_inode(inode); + return; + } + if (!(sb=get_super(inode->i_dev))) + panic("trying to write inode without device"); + block = 2 + sb->s_imap_blocks + sb->s_zmap_blocks + + (inode->i_num-1)/INODES_PER_BLOCK; + if (!(bh=bread(inode->i_dev,block))) + panic("unable to read i-node block"); + __asm__ volatile ("cld"); /* by wyj */ + ((struct d_inode *)bh->b_data) + [(inode->i_num-1)%INODES_PER_BLOCK] = + *(struct d_inode *)inode; + bh->b_dirt=1; + inode->i_dirt=0; + brelse(bh); + unlock_inode(inode); +} diff --git a/os/os/linux/fs/inode.o b/os/os/linux/fs/inode.o new file mode 100644 index 0000000..dd67bfa Binary files /dev/null and b/os/os/linux/fs/inode.o differ diff --git a/os/os/linux/fs/ioctl.c b/os/os/linux/fs/ioctl.c new file mode 100644 index 0000000..36fc976 --- /dev/null +++ b/os/os/linux/fs/ioctl.c @@ -0,0 +1,46 @@ +/* + * linux/fs/ioctl.c + * + * (C) 1991 Linus Torvalds + */ + +#include +#include +#include + +#include + +extern int tty_ioctl(int dev, int cmd, int arg); + +typedef int (*ioctl_ptr)(int dev,int cmd,int arg); + +#define NRDEVS ((sizeof (ioctl_table))/(sizeof (ioctl_ptr))) + +static ioctl_ptr ioctl_table[]={ + NULL, /* nodev */ + NULL, /* /dev/mem */ + NULL, /* /dev/fd */ + NULL, /* /dev/hd */ + tty_ioctl, /* /dev/ttyx */ + tty_ioctl, /* /dev/tty */ + NULL, /* /dev/lp */ + NULL}; /* named pipes */ + + +int sys_ioctl(unsigned int fd, unsigned int cmd, unsigned long arg) +{ + struct file * filp; + int dev,mode; + + if (fd >= NR_OPEN || !(filp = current->filp[fd])) + return -EBADF; + mode=filp->f_inode->i_mode; + if (!S_ISCHR(mode) && !S_ISBLK(mode)) + return -EINVAL; + dev = filp->f_inode->i_zone[0]; + if (MAJOR(dev) >= NRDEVS) + return -ENODEV; + if (!ioctl_table[MAJOR(dev)]) + return -ENOTTY; + return ioctl_table[MAJOR(dev)](dev,cmd,arg); +} diff --git a/os/os/linux/fs/ioctl.o b/os/os/linux/fs/ioctl.o new file mode 100644 index 0000000..1f1f33c Binary files /dev/null and b/os/os/linux/fs/ioctl.o differ diff --git a/os/os/linux/fs/namei.c b/os/os/linux/fs/namei.c new file mode 100644 index 0000000..f8a02b9 --- /dev/null +++ b/os/os/linux/fs/namei.c @@ -0,0 +1,783 @@ +/* + * linux/fs/namei.c + * + * (C) 1991 Linus Torvalds + */ + +/* + * Some corrections by tytso. + */ + +#include +#include +#include + +#include +#include +#include +#include +#include + +#define ACC_MODE(x) ("\004\002\006\377"[(x)&O_ACCMODE]) + +/* + * comment out this line if you want names > NAME_LEN chars to be + * truncated. Else they will be disallowed. + */ +/* #define NO_TRUNCATE */ + +#define MAY_EXEC 1 +#define MAY_WRITE 2 +#define MAY_READ 4 + +/* + * permission() + * + * is used to check for read/write/execute permissions on a file. + * I don't know if we should look at just the euid or both euid and + * uid, but that should be easily changed. + */ +static int permission(struct m_inode * inode,int mask) +{ + int mode = inode->i_mode; + +/* special case: not even root can read/write a deleted file */ + if (inode->i_dev && !inode->i_nlinks) + return 0; + else if (current->euid==inode->i_uid) + mode >>= 6; + else if (current->egid==inode->i_gid) + mode >>= 3; + if (((mode & mask & 0007) == mask) || suser()) + return 1; + return 0; +} + +/* + * ok, we cannot use strncmp, as the name is not in our data space. + * Thus we'll have to use match. No big problem. Match also makes + * some sanity tests. + * + * NOTE! unlike strncmp, match returns 1 for success, 0 for failure. + */ +static int match(int len,const char * name,struct dir_entry * de) +{ + register int same __asm__("ax"); + + if (!de || !de->inode || len > NAME_LEN) + return 0; + if (len < NAME_LEN && de->name[len]) + return 0; + __asm__("cld\n\t" + "fs ; repe ; cmpsb\n\t" + "setz %%al" + :"=a" (same) + :"0" (0),"S" ((long) name),"D" ((long) de->name),"c" (len) + ); + return same; +} + +/* + * find_entry() + * + * finds an entry in the specified directory with the wanted name. It + * returns the cache buffer in which the entry was found, and the entry + * itself (as a parameter - res_dir). It does NOT read the inode of the + * entry - you'll have to do that yourself if you want to. + * + * This also takes care of the few special cases due to '..'-traversal + * over a pseudo-root and a mount point. + */ +static struct buffer_head * find_entry(struct m_inode ** dir, + const char * name, int namelen, struct dir_entry ** res_dir) +{ + int entries; + int block,i; + struct buffer_head * bh; + struct dir_entry * de; + struct super_block * sb; + +#ifdef NO_TRUNCATE + if (namelen > NAME_LEN) + return NULL; +#else + if (namelen > NAME_LEN) + namelen = NAME_LEN; +#endif + entries = (*dir)->i_size / (sizeof (struct dir_entry)); + *res_dir = NULL; + if (!namelen) + return NULL; +/* check for '..', as we might have to do some "magic" for it */ + if (namelen==2 && get_fs_byte(name)=='.' && get_fs_byte(name+1)=='.') { +/* '..' in a pseudo-root results in a faked '.' (just change namelen) */ + if ((*dir) == current->root) + namelen=1; + else if ((*dir)->i_num == ROOT_INO) { +/* '..' over a mount-point results in 'dir' being exchanged for the mounted + directory-inode. NOTE! We set mounted, so that we can iput the new dir */ + sb=get_super((*dir)->i_dev); + if (sb->s_imount) { + iput(*dir); + (*dir)=sb->s_imount; + (*dir)->i_count++; + } + } + } + if (!(block = (*dir)->i_zone[0])) + return NULL; + if (!(bh = bread((*dir)->i_dev,block))) + return NULL; + i = 0; + de = (struct dir_entry *) bh->b_data; + while (i < entries) { + if ((char *)de >= BLOCK_SIZE+bh->b_data) { + brelse(bh); + bh = NULL; + if (!(block = bmap(*dir,i/DIR_ENTRIES_PER_BLOCK)) || + !(bh = bread((*dir)->i_dev,block))) { + i += DIR_ENTRIES_PER_BLOCK; + continue; + } + de = (struct dir_entry *) bh->b_data; + } + if (match(namelen,name,de)) { + *res_dir = de; + return bh; + } + de++; + i++; + } + brelse(bh); + return NULL; +} + +/* + * add_entry() + * + * adds a file entry to the specified directory, using the same + * semantics as find_entry(). It returns NULL if it failed. + * + * NOTE!! The inode part of 'de' is left at 0 - which means you + * may not sleep between calling this and putting something into + * the entry, as someone else might have used it while you slept. + */ +static struct buffer_head * add_entry(struct m_inode * dir, + const char * name, int namelen, struct dir_entry ** res_dir) +{ + int block,i; + struct buffer_head * bh; + struct dir_entry * de; + + *res_dir = NULL; +#ifdef NO_TRUNCATE + if (namelen > NAME_LEN) + return NULL; +#else + if (namelen > NAME_LEN) + namelen = NAME_LEN; +#endif + if (!namelen) + return NULL; + if (!(block = dir->i_zone[0])) + return NULL; + if (!(bh = bread(dir->i_dev,block))) + return NULL; + i = 0; + de = (struct dir_entry *) bh->b_data; + while (1) { + if ((char *)de >= BLOCK_SIZE+bh->b_data) { + brelse(bh); + bh = NULL; + block = create_block(dir,i/DIR_ENTRIES_PER_BLOCK); + if (!block) + return NULL; + if (!(bh = bread(dir->i_dev,block))) { + i += DIR_ENTRIES_PER_BLOCK; + continue; + } + de = (struct dir_entry *) bh->b_data; + } + if (i*sizeof(struct dir_entry) >= dir->i_size) { + de->inode=0; + dir->i_size = (i+1)*sizeof(struct dir_entry); + dir->i_dirt = 1; + dir->i_ctime = CURRENT_TIME; + } + if (!de->inode) { + dir->i_mtime = CURRENT_TIME; + for (i=0; i < NAME_LEN ; i++) + de->name[i]=(ib_dirt = 1; + *res_dir = de; + return bh; + } + de++; + i++; + } + brelse(bh); + return NULL; +} + +/* + * get_dir() + * + * Getdir traverses the pathname until it hits the topmost directory. + * It returns NULL on failure. + */ +static struct m_inode * get_dir(const char * pathname) +{ + char c; + const char * thisname; + struct m_inode * inode; + struct buffer_head * bh; + int namelen,inr,idev; + struct dir_entry * de; + + if (!current->root || !current->root->i_count) + panic("No root inode"); + if (!current->pwd || !current->pwd->i_count) + panic("No cwd inode"); + if ((c=get_fs_byte(pathname))=='/') { + inode = current->root; + pathname++; + } else if (c) + inode = current->pwd; + else + return NULL; /* empty name is bad */ + inode->i_count++; + while (1) { + thisname = pathname; + if (!S_ISDIR(inode->i_mode) || !permission(inode,MAY_EXEC)) { + iput(inode); + return NULL; + } + for(namelen=0;(c=get_fs_byte(pathname++))&&(c!='/');namelen++) + /* nothing */ ; + if (!c) + return inode; + if (!(bh = find_entry(&inode,thisname,namelen,&de))) { + iput(inode); + return NULL; + } + inr = de->inode; + idev = inode->i_dev; + brelse(bh); + iput(inode); + if (!(inode = iget(idev,inr))) + return NULL; + } +} + +/* + * dir_namei() + * + * dir_namei() returns the inode of the directory of the + * specified name, and the name within that directory. + */ +static struct m_inode * dir_namei(const char * pathname, + int * namelen, const char ** name) +{ + char c; + const char * basename; + struct m_inode * dir; + + if (!(dir = get_dir(pathname))) + return NULL; + basename = pathname; + while (c=get_fs_byte(pathname++)) + if (c=='/') + basename=pathname; + *namelen = pathname-basename-1; + *name = basename; + return dir; +} + +/* + * namei() + * + * is used by most simple commands to get the inode of a specified name. + * Open, link etc use their own routines, but this is enough for things + * like 'chmod' etc. + */ +struct m_inode * namei(const char * pathname) +{ + const char * basename; + int inr,dev,namelen; + struct m_inode * dir; + struct buffer_head * bh; + struct dir_entry * de; + + if (!(dir = dir_namei(pathname,&namelen,&basename))) + return NULL; + if (!namelen) /* special case: '/usr/' etc */ + return dir; + bh = find_entry(&dir,basename,namelen,&de); + if (!bh) { + iput(dir); + return NULL; + } + inr = de->inode; + dev = dir->i_dev; + brelse(bh); + iput(dir); + dir=iget(dev,inr); + if (dir) { + dir->i_atime=CURRENT_TIME; + dir->i_dirt=1; + } + return dir; +} + +/* + * open_namei() + * + * namei for open - this is in fact almost the whole open-routine. + */ +int open_namei(const char * pathname, int flag, int mode, + struct m_inode ** res_inode) +{ + const char * basename; + int inr,dev,namelen; + struct m_inode * dir, *inode; + struct buffer_head * bh; + struct dir_entry * de; + + if ((flag & O_TRUNC) && !(flag & O_ACCMODE)) + flag |= O_WRONLY; + mode &= 0777 & ~current->umask; + mode |= I_REGULAR; + if (!(dir = dir_namei(pathname,&namelen,&basename))) + return -ENOENT; + if (!namelen) { /* special case: '/usr/' etc */ + if (!(flag & (O_ACCMODE|O_CREAT|O_TRUNC))) { + *res_inode=dir; + return 0; + } + iput(dir); + return -EISDIR; + } + bh = find_entry(&dir,basename,namelen,&de); + if (!bh) { + if (!(flag & O_CREAT)) { + iput(dir); + return -ENOENT; + } + if (!permission(dir,MAY_WRITE)) { + iput(dir); + return -EACCES; + } + inode = new_inode(dir->i_dev); + if (!inode) { + iput(dir); + return -ENOSPC; + } + inode->i_uid = current->euid; + inode->i_mode = mode; + inode->i_dirt = 1; + bh = add_entry(dir,basename,namelen,&de); + if (!bh) { + inode->i_nlinks--; + iput(inode); + iput(dir); + return -ENOSPC; + } + de->inode = inode->i_num; + bh->b_dirt = 1; + brelse(bh); + iput(dir); + *res_inode = inode; + return 0; + } + inr = de->inode; + dev = dir->i_dev; + brelse(bh); + iput(dir); + if (flag & O_EXCL) + return -EEXIST; + if (!(inode=iget(dev,inr))) + return -EACCES; + if ((S_ISDIR(inode->i_mode) && (flag & O_ACCMODE)) || + !permission(inode,ACC_MODE(flag))) { + iput(inode); + return -EPERM; + } + inode->i_atime = CURRENT_TIME; + if (flag & O_TRUNC) + truncate(inode); + *res_inode = inode; + return 0; +} + +int sys_mknod(const char * filename, int mode, int dev) +{ + const char * basename; + int namelen; + struct m_inode * dir, * inode; + struct buffer_head * bh; + struct dir_entry * de; + + if (!suser()) + return -EPERM; + if (!(dir = dir_namei(filename,&namelen,&basename))) + return -ENOENT; + if (!namelen) { + iput(dir); + return -ENOENT; + } + if (!permission(dir,MAY_WRITE)) { + iput(dir); + return -EPERM; + } + bh = find_entry(&dir,basename,namelen,&de); + if (bh) { + brelse(bh); + iput(dir); + return -EEXIST; + } + inode = new_inode(dir->i_dev); + if (!inode) { + iput(dir); + return -ENOSPC; + } + inode->i_mode = mode; + if (S_ISBLK(mode) || S_ISCHR(mode)) + inode->i_zone[0] = dev; + inode->i_mtime = inode->i_atime = CURRENT_TIME; + inode->i_dirt = 1; + bh = add_entry(dir,basename,namelen,&de); + if (!bh) { + iput(dir); + inode->i_nlinks=0; + iput(inode); + return -ENOSPC; + } + de->inode = inode->i_num; + bh->b_dirt = 1; + iput(dir); + iput(inode); + brelse(bh); + return 0; +} + +int sys_mkdir(const char * pathname, int mode) +{ + const char * basename; + int namelen; + struct m_inode * dir, * inode; + struct buffer_head * bh, *dir_block; + struct dir_entry * de; + + if (!suser()) + return -EPERM; + if (!(dir = dir_namei(pathname,&namelen,&basename))) + return -ENOENT; + if (!namelen) { + iput(dir); + return -ENOENT; + } + if (!permission(dir,MAY_WRITE)) { + iput(dir); + return -EPERM; + } + bh = find_entry(&dir,basename,namelen,&de); + if (bh) { + brelse(bh); + iput(dir); + return -EEXIST; + } + inode = new_inode(dir->i_dev); + if (!inode) { + iput(dir); + return -ENOSPC; + } + inode->i_size = 32; + inode->i_dirt = 1; + inode->i_mtime = inode->i_atime = CURRENT_TIME; + if (!(inode->i_zone[0]=new_block(inode->i_dev))) { + iput(dir); + inode->i_nlinks--; + iput(inode); + return -ENOSPC; + } + inode->i_dirt = 1; + if (!(dir_block=bread(inode->i_dev,inode->i_zone[0]))) { + iput(dir); + free_block(inode->i_dev,inode->i_zone[0]); + inode->i_nlinks--; + iput(inode); + return -ERROR; + } + de = (struct dir_entry *) dir_block->b_data; + de->inode=inode->i_num; + strcpy(de->name,"."); + de++; + de->inode = dir->i_num; + strcpy(de->name,".."); + inode->i_nlinks = 2; + dir_block->b_dirt = 1; + brelse(dir_block); + inode->i_mode = I_DIRECTORY | (mode & 0777 & ~current->umask); + inode->i_dirt = 1; + bh = add_entry(dir,basename,namelen,&de); + if (!bh) { + iput(dir); + free_block(inode->i_dev,inode->i_zone[0]); + inode->i_nlinks=0; + iput(inode); + return -ENOSPC; + } + de->inode = inode->i_num; + bh->b_dirt = 1; + dir->i_nlinks++; + dir->i_dirt = 1; + iput(dir); + iput(inode); + brelse(bh); + return 0; +} + +/* + * routine to check that the specified directory is empty (for rmdir) + */ +static int empty_dir(struct m_inode * inode) +{ + int nr,block; + int len; + struct buffer_head * bh; + struct dir_entry * de; + + len = inode->i_size / sizeof (struct dir_entry); + if (len<2 || !inode->i_zone[0] || + !(bh=bread(inode->i_dev,inode->i_zone[0]))) { + printk("warning - bad directory on dev %04x\n",inode->i_dev); + return 0; + } + de = (struct dir_entry *) bh->b_data; + if (de[0].inode != inode->i_num || !de[1].inode || + strcmp(".",de[0].name) || strcmp("..",de[1].name)) { + printk("warning - bad directory on dev %04x\n",inode->i_dev); + return 0; + } + nr = 2; + de += 2; + while (nr= (void *) (bh->b_data+BLOCK_SIZE)) { + brelse(bh); + block=bmap(inode,nr/DIR_ENTRIES_PER_BLOCK); + if (!block) { + nr += DIR_ENTRIES_PER_BLOCK; + continue; + } + if (!(bh=bread(inode->i_dev,block))) + return 0; + de = (struct dir_entry *) bh->b_data; + } + if (de->inode) { + brelse(bh); + return 0; + } + de++; + nr++; + } + brelse(bh); + return 1; +} + +int sys_rmdir(const char * name) +{ + const char * basename; + int namelen; + struct m_inode * dir, * inode; + struct buffer_head * bh; + struct dir_entry * de; + + if (!suser()) + return -EPERM; + if (!(dir = dir_namei(name,&namelen,&basename))) + return -ENOENT; + if (!namelen) { + iput(dir); + return -ENOENT; + } + if (!permission(dir,MAY_WRITE)) { + iput(dir); + return -EPERM; + } + bh = find_entry(&dir,basename,namelen,&de); + if (!bh) { + iput(dir); + return -ENOENT; + } + if (!(inode = iget(dir->i_dev, de->inode))) { + iput(dir); + brelse(bh); + return -EPERM; + } + if ((dir->i_mode & S_ISVTX) && current->euid && + inode->i_uid != current->euid) { + iput(dir); + iput(inode); + brelse(bh); + return -EPERM; + } + if (inode->i_dev != dir->i_dev || inode->i_count>1) { + iput(dir); + iput(inode); + brelse(bh); + return -EPERM; + } + if (inode == dir) { /* we may not delete ".", but "../dir" is ok */ + iput(inode); + iput(dir); + brelse(bh); + return -EPERM; + } + if (!S_ISDIR(inode->i_mode)) { + iput(inode); + iput(dir); + brelse(bh); + return -ENOTDIR; + } + if (!empty_dir(inode)) { + iput(inode); + iput(dir); + brelse(bh); + return -ENOTEMPTY; + } + if (inode->i_nlinks != 2) + printk("empty directory has nlink!=2 (%d)",inode->i_nlinks); + de->inode = 0; + bh->b_dirt = 1; + brelse(bh); + inode->i_nlinks=0; + inode->i_dirt=1; + dir->i_nlinks--; + dir->i_ctime = dir->i_mtime = CURRENT_TIME; + dir->i_dirt=1; + iput(dir); + iput(inode); + return 0; +} + +int sys_unlink(const char * name) +{ + const char * basename; + int namelen; + struct m_inode * dir, * inode; + struct buffer_head * bh; + struct dir_entry * de; + + if (!(dir = dir_namei(name,&namelen,&basename))) + return -ENOENT; + if (!namelen) { + iput(dir); + return -ENOENT; + } + if (!permission(dir,MAY_WRITE)) { + iput(dir); + return -EPERM; + } + bh = find_entry(&dir,basename,namelen,&de); + if (!bh) { + iput(dir); + return -ENOENT; + } + if (!(inode = iget(dir->i_dev, de->inode))) { + iput(dir); + brelse(bh); + return -ENOENT; + } + if ((dir->i_mode & S_ISVTX) && !suser() && + current->euid != inode->i_uid && + current->euid != dir->i_uid) { + iput(dir); + iput(inode); + brelse(bh); + return -EPERM; + } + if (S_ISDIR(inode->i_mode)) { + iput(inode); + iput(dir); + brelse(bh); + return -EPERM; + } + if (!inode->i_nlinks) { + printk("Deleting nonexistent file (%04x:%d), %d\n", + inode->i_dev,inode->i_num,inode->i_nlinks); + inode->i_nlinks=1; + } + de->inode = 0; + bh->b_dirt = 1; + brelse(bh); + inode->i_nlinks--; + inode->i_dirt = 1; + inode->i_ctime = CURRENT_TIME; + iput(inode); + iput(dir); + return 0; +} + +int sys_symlink() +{ + return -ENOSYS; +} + +int sys_link(const char * oldname, const char * newname) +{ + struct dir_entry * de; + struct m_inode * oldinode, * dir; + struct buffer_head * bh; + const char * basename; + int namelen; + + oldinode=namei(oldname); + if (!oldinode) + return -ENOENT; + if (S_ISDIR(oldinode->i_mode)) { + iput(oldinode); + return -EPERM; + } + dir = dir_namei(newname,&namelen,&basename); + if (!dir) { + iput(oldinode); + return -EACCES; + } + if (!namelen) { + iput(oldinode); + iput(dir); + return -EPERM; + } + if (dir->i_dev != oldinode->i_dev) { + iput(dir); + iput(oldinode); + return -EXDEV; + } + if (!permission(dir,MAY_WRITE)) { + iput(dir); + iput(oldinode); + return -EACCES; + } + bh = find_entry(&dir,basename,namelen,&de); + if (bh) { + brelse(bh); + iput(dir); + iput(oldinode); + return -EEXIST; + } + bh = add_entry(dir,basename,namelen,&de); + if (!bh) { + iput(dir); + iput(oldinode); + return -ENOSPC; + } + de->inode = oldinode->i_num; + bh->b_dirt = 1; + brelse(bh); + iput(dir); + oldinode->i_nlinks++; + oldinode->i_ctime = CURRENT_TIME; + oldinode->i_dirt = 1; + iput(oldinode); + return 0; +} diff --git a/os/os/linux/fs/namei.o b/os/os/linux/fs/namei.o new file mode 100644 index 0000000..0514463 Binary files /dev/null and b/os/os/linux/fs/namei.o differ diff --git a/os/os/linux/fs/open.c b/os/os/linux/fs/open.c new file mode 100644 index 0000000..3695ff1 --- /dev/null +++ b/os/os/linux/fs/open.c @@ -0,0 +1,208 @@ +/* + * linux/fs/open.c + * + * (C) 1991 Linus Torvalds + */ + +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include + +int sys_ustat(int dev, struct ustat * ubuf) +{ + return -ENOSYS; +} + +int sys_utime(char * filename, struct utimbuf * times) +{ + struct m_inode * inode; + long actime,modtime; + + if (!(inode=namei(filename))) + return -ENOENT; + if (times) { + actime = get_fs_long((unsigned long *) ×->actime); + modtime = get_fs_long((unsigned long *) ×->modtime); + } else + actime = modtime = CURRENT_TIME; + inode->i_atime = actime; + inode->i_mtime = modtime; + inode->i_dirt = 1; + iput(inode); + return 0; +} + +/* + * XXX should we use the real or effective uid? BSD uses the real uid, + * so as to make this call useful to setuid programs. + */ +int sys_access(const char * filename,int mode) +{ + struct m_inode * inode; + int res, i_mode; + + mode &= 0007; + if (!(inode=namei(filename))) + return -EACCES; + i_mode = res = inode->i_mode & 0777; + iput(inode); + if (current->uid == inode->i_uid) + res >>= 6; + else if (current->gid == inode->i_gid) + res >>= 6; + if ((res & 0007 & mode) == mode) + return 0; + /* + * XXX we are doing this test last because we really should be + * swapping the effective with the real user id (temporarily), + * and then calling suser() routine. If we do call the + * suser() routine, it needs to be called last. + */ + if ((!current->uid) && + (!(mode & 1) || (i_mode & 0111))) + return 0; + return -EACCES; +} + +int sys_chdir(const char * filename) +{ + struct m_inode * inode; + + if (!(inode = namei(filename))) + return -ENOENT; + if (!S_ISDIR(inode->i_mode)) { + iput(inode); + return -ENOTDIR; + } + iput(current->pwd); + current->pwd = inode; + return (0); +} + +int sys_chroot(const char * filename) +{ + struct m_inode * inode; + + if (!(inode=namei(filename))) + return -ENOENT; + if (!S_ISDIR(inode->i_mode)) { + iput(inode); + return -ENOTDIR; + } + iput(current->root); + current->root = inode; + return (0); +} + +int sys_chmod(const char * filename,int mode) +{ + struct m_inode * inode; + + if (!(inode=namei(filename))) + return -ENOENT; + if ((current->euid != inode->i_uid) && !suser()) { + iput(inode); + return -EACCES; + } + inode->i_mode = (mode & 07777) | (inode->i_mode & ~07777); + inode->i_dirt = 1; + iput(inode); + return 0; +} + +int sys_chown(const char * filename,int uid,int gid) +{ + struct m_inode * inode; + + if (!(inode=namei(filename))) + return -ENOENT; + if (!suser()) { + iput(inode); + return -EACCES; + } + inode->i_uid=uid; + inode->i_gid=gid; + inode->i_dirt=1; + iput(inode); + return 0; +} + +int sys_open(const char * filename,int flag,int mode) +{ + struct m_inode * inode; + struct file * f; + int i,fd; + + mode &= 0777 & ~current->umask; + for(fd=0 ; fdfilp[fd]) + break; + if (fd>=NR_OPEN) + return -EINVAL; + current->close_on_exec &= ~(1<f_count) break; + if (i>=NR_FILE) + return -EINVAL; + (current->filp[fd]=f)->f_count++; + if ((i=open_namei(filename,flag,mode,&inode))<0) { + current->filp[fd]=NULL; + f->f_count=0; + return i; + } +/* ttys are somewhat special (ttyxx major==4, tty major==5) */ + if (S_ISCHR(inode->i_mode)) + if (MAJOR(inode->i_zone[0])==4) { + if (current->leader && current->tty<0) { + current->tty = MINOR(inode->i_zone[0]); + tty_table[current->tty].pgrp = current->pgrp; + } + } else if (MAJOR(inode->i_zone[0])==5) + if (current->tty<0) { + iput(inode); + current->filp[fd]=NULL; + f->f_count=0; + return -EPERM; + } +/* Likewise with block-devices: check for floppy_change */ + if (S_ISBLK(inode->i_mode)) + check_disk_change(inode->i_zone[0]); + f->f_mode = inode->i_mode; + f->f_flags = flag; + f->f_count = 1; + f->f_inode = inode; + f->f_pos = 0; + return (fd); +} + +int sys_creat(const char * pathname, int mode) +{ + return sys_open(pathname, O_CREAT | O_TRUNC, mode); +} + +int sys_close(unsigned int fd) +{ + struct file * filp; + + if (fd >= NR_OPEN) + return -EINVAL; + current->close_on_exec &= ~(1<filp[fd])) + return -EINVAL; + current->filp[fd] = NULL; + if (filp->f_count == 0) + panic("Close: file count is 0"); + if (--filp->f_count) + return (0); + iput(filp->f_inode); + return (0); +} diff --git a/os/os/linux/fs/open.o b/os/os/linux/fs/open.o new file mode 100644 index 0000000..aceb4b8 Binary files /dev/null and b/os/os/linux/fs/open.o differ diff --git a/os/os/linux/fs/pipe.c b/os/os/linux/fs/pipe.c new file mode 100644 index 0000000..dfc4480 --- /dev/null +++ b/os/os/linux/fs/pipe.c @@ -0,0 +1,111 @@ +/* + * linux/fs/pipe.c + * + * (C) 1991 Linus Torvalds + */ + +#include + +#include +#include /* for get_free_page */ +#include + +int read_pipe(struct m_inode * inode, char * buf, int count) +{ + int chars, size, read = 0; + + while (count>0) { + while (!(size=PIPE_SIZE(*inode))) { + wake_up(&inode->i_wait); + if (inode->i_count != 2) /* are there any writers? */ + return read; + sleep_on(&inode->i_wait); + } + chars = PAGE_SIZE-PIPE_TAIL(*inode); + if (chars > count) + chars = count; + if (chars > size) + chars = size; + count -= chars; + read += chars; + size = PIPE_TAIL(*inode); + PIPE_TAIL(*inode) += chars; + PIPE_TAIL(*inode) &= (PAGE_SIZE-1); + while (chars-->0) + put_fs_byte(((char *)inode->i_size)[size++],buf++); + } + wake_up(&inode->i_wait); + return read; +} + +int write_pipe(struct m_inode * inode, char * buf, int count) +{ + int chars, size, written = 0; + + while (count>0) { + while (!(size=(PAGE_SIZE-1)-PIPE_SIZE(*inode))) { + wake_up(&inode->i_wait); + if (inode->i_count != 2) { /* no readers */ + current->signal |= (1<<(SIGPIPE-1)); + return written?written:-1; + } + sleep_on(&inode->i_wait); + } + chars = PAGE_SIZE-PIPE_HEAD(*inode); + if (chars > count) + chars = count; + if (chars > size) + chars = size; + count -= chars; + written += chars; + size = PIPE_HEAD(*inode); + PIPE_HEAD(*inode) += chars; + PIPE_HEAD(*inode) &= (PAGE_SIZE-1); + while (chars-->0) + ((char *)inode->i_size)[size++]=get_fs_byte(buf++); + } + wake_up(&inode->i_wait); + return written; +} + +int sys_pipe(unsigned long * fildes) +{ + struct m_inode * inode; + struct file * f[2]; + int fd[2]; + int i,j; + + j=0; + for(i=0;j<2 && if_count++; + if (j==1) + f[0]->f_count=0; + if (j<2) + return -1; + j=0; + for(i=0;j<2 && ifilp[i]) { + current->filp[ fd[j]=i ] = f[j]; + j++; + } + if (j==1) + current->filp[fd[0]]=NULL; + if (j<2) { + f[0]->f_count=f[1]->f_count=0; + return -1; + } + if (!(inode=get_pipe_inode())) { + current->filp[fd[0]] = + current->filp[fd[1]] = NULL; + f[0]->f_count = f[1]->f_count = 0; + return -1; + } + f[0]->f_inode = f[1]->f_inode = inode; + f[0]->f_pos = f[1]->f_pos = 0; + f[0]->f_mode = 1; /* read */ + f[1]->f_mode = 2; /* write */ + put_fs_long(fd[0],0+fildes); + put_fs_long(fd[1],1+fildes); + return 0; +} diff --git a/os/os/linux/fs/pipe.o b/os/os/linux/fs/pipe.o new file mode 100644 index 0000000..d5b5db2 Binary files /dev/null and b/os/os/linux/fs/pipe.o differ diff --git a/os/os/linux/fs/read_write.c b/os/os/linux/fs/read_write.c new file mode 100644 index 0000000..341274a --- /dev/null +++ b/os/os/linux/fs/read_write.c @@ -0,0 +1,103 @@ +/* + * linux/fs/read_write.c + * + * (C) 1991 Linus Torvalds + */ + +#include +#include +#include + +#include +#include +#include + +extern int rw_char(int rw,int dev, char * buf, int count, off_t * pos); +extern int read_pipe(struct m_inode * inode, char * buf, int count); +extern int write_pipe(struct m_inode * inode, char * buf, int count); +extern int block_read(int dev, off_t * pos, char * buf, int count); +extern int block_write(int dev, off_t * pos, char * buf, int count); +extern int file_read(struct m_inode * inode, struct file * filp, + char * buf, int count); +extern int file_write(struct m_inode * inode, struct file * filp, + char * buf, int count); + +int sys_lseek(unsigned int fd,off_t offset, int origin) +{ + struct file * file; + int tmp; + + if (fd >= NR_OPEN || !(file=current->filp[fd]) || !(file->f_inode) + || !IS_SEEKABLE(MAJOR(file->f_inode->i_dev))) + return -EBADF; + if (file->f_inode->i_pipe) + return -ESPIPE; + switch (origin) { + case 0: + if (offset<0) return -EINVAL; + file->f_pos=offset; + break; + case 1: + if (file->f_pos+offset<0) return -EINVAL; + file->f_pos += offset; + break; + case 2: + if ((tmp=file->f_inode->i_size+offset) < 0) + return -EINVAL; + file->f_pos = tmp; + break; + default: + return -EINVAL; + } + return file->f_pos; +} + +int sys_read(unsigned int fd,char * buf,int count) +{ + struct file * file; + struct m_inode * inode; + + if (fd>=NR_OPEN || count<0 || !(file=current->filp[fd])) + return -EINVAL; + if (!count) + return 0; + verify_area(buf,count); + inode = file->f_inode; + if (inode->i_pipe) + return (file->f_mode&1)?read_pipe(inode,buf,count):-EIO; + if (S_ISCHR(inode->i_mode)) + return rw_char(READ,inode->i_zone[0],buf,count,&file->f_pos); + if (S_ISBLK(inode->i_mode)) + return block_read(inode->i_zone[0],&file->f_pos,buf,count); + if (S_ISDIR(inode->i_mode) || S_ISREG(inode->i_mode)) { + if (count+file->f_pos > inode->i_size) + count = inode->i_size - file->f_pos; + if (count<=0) + return 0; + return file_read(inode,file,buf,count); + } + printk("(Read)inode->i_mode=%06o\n\r",inode->i_mode); + return -EINVAL; +} + +int sys_write(unsigned int fd,char * buf,int count) +{ + struct file * file; + struct m_inode * inode; + + if (fd>=NR_OPEN || count <0 || !(file=current->filp[fd])) + return -EINVAL; + if (!count) + return 0; + inode=file->f_inode; + if (inode->i_pipe) + return (file->f_mode&2)?write_pipe(inode,buf,count):-EIO; + if (S_ISCHR(inode->i_mode)) + return rw_char(WRITE,inode->i_zone[0],buf,count,&file->f_pos); + if (S_ISBLK(inode->i_mode)) + return block_write(inode->i_zone[0],&file->f_pos,buf,count); + if (S_ISREG(inode->i_mode)) + return file_write(inode,file,buf,count); + printk("(Write)inode->i_mode=%06o\n\r",inode->i_mode); + return -EINVAL; +} diff --git a/os/os/linux/fs/read_write.o b/os/os/linux/fs/read_write.o new file mode 100644 index 0000000..998aad9 Binary files /dev/null and b/os/os/linux/fs/read_write.o differ diff --git a/os/os/linux/fs/select.c b/os/os/linux/fs/select.c new file mode 100644 index 0000000..cef8b43 --- /dev/null +++ b/os/os/linux/fs/select.c @@ -0,0 +1,10 @@ +/* nothing , only the stub */ +/* gohigh */ + +#include + +int sys_select() +{ + return -ENOSYS; +} + diff --git a/os/os/linux/fs/select.o b/os/os/linux/fs/select.o new file mode 100644 index 0000000..d61f73a Binary files /dev/null and b/os/os/linux/fs/select.o differ diff --git a/os/os/linux/fs/stat.c b/os/os/linux/fs/stat.c new file mode 100644 index 0000000..ef09856 --- /dev/null +++ b/os/os/linux/fs/stat.c @@ -0,0 +1,66 @@ +/* + * linux/fs/stat.c + * + * (C) 1991 Linus Torvalds + */ + +#include +#include + +#include +#include +#include +#include + +static void cp_stat(struct m_inode * inode, struct stat * statbuf) +{ + struct stat tmp; + int i; + + verify_area(statbuf,sizeof (* statbuf)); + tmp.st_dev = inode->i_dev; + tmp.st_ino = inode->i_num; + tmp.st_mode = inode->i_mode; + tmp.st_nlink = inode->i_nlinks; + tmp.st_uid = inode->i_uid; + tmp.st_gid = inode->i_gid; + tmp.st_rdev = inode->i_zone[0]; + tmp.st_size = inode->i_size; + tmp.st_atime = inode->i_atime; + tmp.st_mtime = inode->i_mtime; + tmp.st_ctime = inode->i_ctime; + for (i=0 ; i= NR_OPEN || !(f=current->filp[fd]) || !(inode=f->f_inode)) + return -EBADF; + cp_stat(inode,statbuf); + return 0; +} + +int sys_readlink() +{ + return -ENOSYS; +} diff --git a/os/os/linux/fs/stat.o b/os/os/linux/fs/stat.o new file mode 100644 index 0000000..fdb41d3 Binary files /dev/null and b/os/os/linux/fs/stat.o differ diff --git a/os/os/linux/fs/super.c b/os/os/linux/fs/super.c new file mode 100644 index 0000000..6a4ccb1 --- /dev/null +++ b/os/os/linux/fs/super.c @@ -0,0 +1,282 @@ +/* + * linux/fs/super.c + * + * (C) 1991 Linus Torvalds + */ + +/* + * super.c contains code to handle the super-block tables. + */ +#include +#include +#include +#include + +#include +#include + +int sync_dev(int dev); +void wait_for_keypress(void); + +/* set_bit uses setb, as gas doesn't recognize setc */ +#define set_bit(bitnr,addr) ({ \ +register int __res __asm__("ax"); \ +__asm__("bt %2,%3;setb %%al":"=a" (__res):"a" (0),"r" (bitnr),"m" (*(addr))); \ +__res; }) + +struct super_block super_block[NR_SUPER]; +/* this is initialized in init/main.c */ +int ROOT_DEV = 0; + +static void lock_super(struct super_block * sb) +{ + cli(); + while (sb->s_lock) + sleep_on(&(sb->s_wait)); + sb->s_lock = 1; + sti(); +} + +static void free_super(struct super_block * sb) +{ + cli(); + sb->s_lock = 0; + wake_up(&(sb->s_wait)); + sti(); +} + +static void wait_on_super(struct super_block * sb) +{ + cli(); + while (sb->s_lock) + sleep_on(&(sb->s_wait)); + sti(); +} + +struct super_block * get_super(int dev) +{ + struct super_block * s; + + if (!dev) + return NULL; + s = 0+super_block; + while (s < NR_SUPER+super_block) + if (s->s_dev == dev) { + wait_on_super(s); + if (s->s_dev == dev) + return s; + s = 0+super_block; + } else + s++; + return NULL; +} + +void put_super(int dev) +{ + struct super_block * sb; +/* struct m_inode * inode; */ + int i; + + if (dev == ROOT_DEV) { + printk("root diskette changed: prepare for armageddon\n\r"); + return; + } + if (!(sb = get_super(dev))) + return; + if (sb->s_imount) { + printk("Mounted disk changed - tssk, tssk\n\r"); + return; + } + lock_super(sb); + sb->s_dev = 0; + for(i=0;is_imap[i]); + for(i=0;is_zmap[i]); + free_super(sb); + return; +} + +static struct super_block * read_super(int dev) +{ + struct super_block * s; + struct buffer_head * bh; + int i,block; + + if (!dev) + return NULL; + check_disk_change(dev); + if (s = get_super(dev)) + return s; + for (s = 0+super_block ;; s++) { + if (s >= NR_SUPER+super_block) + return NULL; + if (!s->s_dev) + break; + } + s->s_dev = dev; + s->s_isup = NULL; + s->s_imount = NULL; + s->s_time = 0; + s->s_rd_only = 0; + s->s_dirt = 0; + lock_super(s); + if (!(bh = bread(dev,1))) { + s->s_dev=0; + free_super(s); + return NULL; + } + __asm__ volatile ("cld"); /* by wyj */ + *((struct d_super_block *) s) = + *((struct d_super_block *) bh->b_data); + brelse(bh); + if (s->s_magic != SUPER_MAGIC) { + s->s_dev = 0; + free_super(s); + return NULL; + } + for (i=0;is_imap[i] = NULL; + for (i=0;is_zmap[i] = NULL; + block=2; + for (i=0 ; i < s->s_imap_blocks ; i++) + if (s->s_imap[i]=bread(dev,block)) + block++; + else + break; + for (i=0 ; i < s->s_zmap_blocks ; i++) + if (s->s_zmap[i]=bread(dev,block)) + block++; + else + break; + if (block != 2+s->s_imap_blocks+s->s_zmap_blocks) { + for(i=0;is_imap[i]); + for(i=0;is_zmap[i]); + s->s_dev=0; + free_super(s); + return NULL; + } + s->s_imap[0]->b_data[0] |= 1; + s->s_zmap[0]->b_data[0] |= 1; + free_super(s); + return s; +} + +int sys_umount(char * dev_name) +{ + struct m_inode * inode; + struct super_block * sb; + int dev; + + if (!(inode=namei(dev_name))) + return -ENOENT; + dev = inode->i_zone[0]; + if (!S_ISBLK(inode->i_mode)) { + iput(inode); + return -ENOTBLK; + } + iput(inode); + if (dev==ROOT_DEV) + return -EBUSY; + if (!(sb=get_super(dev)) || !(sb->s_imount)) + return -ENOENT; + if (!sb->s_imount->i_mount) + printk("Mounted inode has i_mount=0\n"); + for (inode=inode_table+0 ; inodei_dev==dev && inode->i_count) + return -EBUSY; + sb->s_imount->i_mount=0; + iput(sb->s_imount); + sb->s_imount = NULL; + iput(sb->s_isup); + sb->s_isup = NULL; + put_super(dev); + sync_dev(dev); + return 0; +} + +int sys_mount(char * dev_name, char * dir_name, int rw_flag) +{ + struct m_inode * dev_i, * dir_i; + struct super_block * sb; + int dev; + + if (!(dev_i=namei(dev_name))) + return -ENOENT; + dev = dev_i->i_zone[0]; + if (!S_ISBLK(dev_i->i_mode)) { + iput(dev_i); + return -EPERM; + } + iput(dev_i); + if (!(dir_i=namei(dir_name))) + return -ENOENT; + if (dir_i->i_count != 1 || dir_i->i_num == ROOT_INO) { + iput(dir_i); + return -EBUSY; + } + if (!S_ISDIR(dir_i->i_mode)) { + iput(dir_i); + return -EPERM; + } + if (!(sb=read_super(dev))) { + iput(dir_i); + return -EBUSY; + } + if (sb->s_imount) { + iput(dir_i); + return -EBUSY; + } + if (dir_i->i_mount) { + iput(dir_i); + return -EPERM; + } + sb->s_imount=dir_i; + dir_i->i_mount=1; + dir_i->i_dirt=1; /* NOTE! we don't iput(dir_i) */ + return 0; /* we do that in umount */ +} + +void mount_root(void) +{ + int i,free; + struct super_block * p; + struct m_inode * mi; + + if (32 != sizeof (struct d_inode)) + panic("bad i-node size"); + for(i=0;is_dev = 0; + p->s_lock = 0; + p->s_wait = NULL; + } + if (!(p=read_super(ROOT_DEV))) + panic("Unable to mount root"); + if (!(mi=iget(ROOT_DEV,ROOT_INO))) + panic("Unable to read root i-node"); + mi->i_count += 3 ; /* NOTE! it is logically used 4 times, not 1 */ + p->s_isup = p->s_imount = mi; + current->pwd = mi; + current->root = mi; + free=0; + i=p->s_nzones; + while (-- i >= 0) + if (!set_bit(i&8191,p->s_zmap[i>>13]->b_data)) + free++; + printk("%d/%d free blocks\n\r",free,p->s_nzones); + free=0; + i=p->s_ninodes+1; + while (-- i >= 0) + if (!set_bit(i&8191,p->s_imap[i>>13]->b_data)) + free++; + printk("%d/%d free inodes\n\r",free,p->s_ninodes); +} diff --git a/os/os/linux/fs/super.o b/os/os/linux/fs/super.o new file mode 100644 index 0000000..b551798 Binary files /dev/null and b/os/os/linux/fs/super.o differ diff --git a/os/os/linux/fs/truncate.c b/os/os/linux/fs/truncate.c new file mode 100644 index 0000000..36f3ea2 --- /dev/null +++ b/os/os/linux/fs/truncate.c @@ -0,0 +1,65 @@ +/* + * linux/fs/truncate.c + * + * (C) 1991 Linus Torvalds + */ + +#include + +#include + +static void free_ind(int dev,int block) +{ + struct buffer_head * bh; + unsigned short * p; + int i; + + if (!block) + return; + if (bh=bread(dev,block)) { + p = (unsigned short *) bh->b_data; + for (i=0;i<512;i++,p++) + if (*p) + free_block(dev,*p); + brelse(bh); + } + free_block(dev,block); +} + +static void free_dind(int dev,int block) +{ + struct buffer_head * bh; + unsigned short * p; + int i; + + if (!block) + return; + if (bh=bread(dev,block)) { + p = (unsigned short *) bh->b_data; + for (i=0;i<512;i++,p++) + if (*p) + free_ind(dev,*p); + brelse(bh); + } + free_block(dev,block); +} + +void truncate(struct m_inode * inode) +{ + int i; + + if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) + return; + for (i=0;i<7;i++) + if (inode->i_zone[i]) { + free_block(inode->i_dev,inode->i_zone[i]); + inode->i_zone[i]=0; + } + free_ind(inode->i_dev,inode->i_zone[7]); + free_dind(inode->i_dev,inode->i_zone[8]); + inode->i_zone[7] = inode->i_zone[8] = 0; + inode->i_size = 0; + inode->i_dirt = 1; + inode->i_mtime = inode->i_ctime = CURRENT_TIME; +} + diff --git a/os/os/linux/fs/truncate.o b/os/os/linux/fs/truncate.o new file mode 100644 index 0000000..8975b92 Binary files /dev/null and b/os/os/linux/fs/truncate.o differ diff --git a/os/os/linux/include/a.out.h b/os/os/linux/include/a.out.h new file mode 100644 index 0000000..3e67974 --- /dev/null +++ b/os/os/linux/include/a.out.h @@ -0,0 +1,220 @@ +#ifndef _A_OUT_H +#define _A_OUT_H + +#define __GNU_EXEC_MACROS__ + +struct exec { + unsigned long a_magic; /* Use macros N_MAGIC, etc for access */ + unsigned a_text; /* length of text, in bytes */ + unsigned a_data; /* length of data, in bytes */ + unsigned a_bss; /* length of uninitialized data area for file, in bytes */ + unsigned a_syms; /* length of symbol table data in file, in bytes */ + unsigned a_entry; /* start address */ + unsigned a_trsize; /* length of relocation info for text, in bytes */ + unsigned a_drsize; /* length of relocation info for data, in bytes */ +}; + +#ifndef N_MAGIC +#define N_MAGIC(exec) ((exec).a_magic) +#endif + +#ifndef OMAGIC +/* Code indicating object file or impure executable. */ +#define OMAGIC 0407 +/* Code indicating pure executable. */ +#define NMAGIC 0410 +/* Code indicating demand-paged executable. */ +#define ZMAGIC 0413 +#endif /* not OMAGIC */ + +#ifndef N_BADMAG +#define N_BADMAG(x) \ + (N_MAGIC(x) != OMAGIC && N_MAGIC(x) != NMAGIC \ + && N_MAGIC(x) != ZMAGIC) +#endif + +#define _N_BADMAG(x) \ + (N_MAGIC(x) != OMAGIC && N_MAGIC(x) != NMAGIC \ + && N_MAGIC(x) != ZMAGIC) + +#define _N_HDROFF(x) (SEGMENT_SIZE - sizeof (struct exec)) + +#ifndef N_TXTOFF +#define N_TXTOFF(x) \ + (N_MAGIC(x) == ZMAGIC ? _N_HDROFF((x)) + sizeof (struct exec) : sizeof (struct exec)) +#endif + +#ifndef N_DATOFF +#define N_DATOFF(x) (N_TXTOFF(x) + (x).a_text) +#endif + +#ifndef N_TRELOFF +#define N_TRELOFF(x) (N_DATOFF(x) + (x).a_data) +#endif + +#ifndef N_DRELOFF +#define N_DRELOFF(x) (N_TRELOFF(x) + (x).a_trsize) +#endif + +#ifndef N_SYMOFF +#define N_SYMOFF(x) (N_DRELOFF(x) + (x).a_drsize) +#endif + +#ifndef N_STROFF +#define N_STROFF(x) (N_SYMOFF(x) + (x).a_syms) +#endif + +/* Address of text segment in memory after it is loaded. */ +#ifndef N_TXTADDR +#define N_TXTADDR(x) 0 +#endif + +/* Address of data segment in memory after it is loaded. + Note that it is up to you to define SEGMENT_SIZE + on machines not listed here. */ +#if defined(vax) || defined(hp300) || defined(pyr) +#define SEGMENT_SIZE PAGE_SIZE +#endif +#ifdef hp300 +#define PAGE_SIZE 4096 +#endif +#ifdef sony +#define SEGMENT_SIZE 0x2000 +#endif /* Sony. */ +#ifdef is68k +#define SEGMENT_SIZE 0x20000 +#endif +#if defined(m68k) && defined(PORTAR) +#define PAGE_SIZE 0x400 +#define SEGMENT_SIZE PAGE_SIZE +#endif + +#define PAGE_SIZE 4096 +#define SEGMENT_SIZE 1024 + +#define _N_SEGMENT_ROUND(x) (((x) + SEGMENT_SIZE - 1) & ~(SEGMENT_SIZE - 1)) + +#define _N_TXTENDADDR(x) (N_TXTADDR(x)+(x).a_text) + +#ifndef N_DATADDR +#define N_DATADDR(x) \ + (N_MAGIC(x)==OMAGIC? (_N_TXTENDADDR(x)) \ + : (_N_SEGMENT_ROUND (_N_TXTENDADDR(x)))) +#endif + +/* Address of bss segment in memory after it is loaded. */ +#ifndef N_BSSADDR +#define N_BSSADDR(x) (N_DATADDR(x) + (x).a_data) +#endif + +#ifndef N_NLIST_DECLARED +struct nlist { + union { + char *n_name; + struct nlist *n_next; + long n_strx; + } n_un; + unsigned char n_type; + char n_other; + short n_desc; + unsigned long n_value; +}; +#endif + +#ifndef N_UNDF +#define N_UNDF 0 +#endif +#ifndef N_ABS +#define N_ABS 2 +#endif +#ifndef N_TEXT +#define N_TEXT 4 +#endif +#ifndef N_DATA +#define N_DATA 6 +#endif +#ifndef N_BSS +#define N_BSS 8 +#endif +#ifndef N_COMM +#define N_COMM 18 +#endif +#ifndef N_FN +#define N_FN 15 +#endif + +#ifndef N_EXT +#define N_EXT 1 +#endif +#ifndef N_TYPE +#define N_TYPE 036 +#endif +#ifndef N_STAB +#define N_STAB 0340 +#endif + +/* The following type indicates the definition of a symbol as being + an indirect reference to another symbol. The other symbol + appears as an undefined reference, immediately following this symbol. + + Indirection is asymmetrical. The other symbol's value will be used + to satisfy requests for the indirect symbol, but not vice versa. + If the other symbol does not have a definition, libraries will + be searched to find a definition. */ +#define N_INDR 0xa + +/* The following symbols refer to set elements. + All the N_SET[ATDB] symbols with the same name form one set. + Space is allocated for the set in the text section, and each set + element's value is stored into one word of the space. + The first word of the space is the length of the set (number of elements). + + The address of the set is made into an N_SETV symbol + whose name is the same as the name of the set. + This symbol acts like a N_DATA global symbol + in that it can satisfy undefined external references. */ + +/* These appear as input to LD, in a .o file. */ +#define N_SETA 0x14 /* Absolute set element symbol */ +#define N_SETT 0x16 /* Text set element symbol */ +#define N_SETD 0x18 /* Data set element symbol */ +#define N_SETB 0x1A /* Bss set element symbol */ + +/* This is output from LD. */ +#define N_SETV 0x1C /* Pointer to set vector in data area. */ + +#ifndef N_RELOCATION_INFO_DECLARED + +/* This structure describes a single relocation to be performed. + The text-relocation section of the file is a vector of these structures, + all of which apply to the text section. + Likewise, the data-relocation section applies to the data section. */ + +struct relocation_info +{ + /* Address (within segment) to be relocated. */ + int r_address; + /* The meaning of r_symbolnum depends on r_extern. */ + unsigned int r_symbolnum:24; + /* Nonzero means value is a pc-relative offset + and it should be relocated for changes in its own address + as well as for changes in the symbol or section specified. */ + unsigned int r_pcrel:1; + /* Length (as exponent of 2) of the field to be relocated. + Thus, a value of 2 indicates 1<<2 bytes. */ + unsigned int r_length:2; + /* 1 => relocate with value of symbol. + r_symbolnum is the index of the symbol + in file's the symbol table. + 0 => relocate with the address of a segment. + r_symbolnum is N_TEXT, N_DATA, N_BSS or N_ABS + (the N_EXT bit may be set also, but signifies nothing). */ + unsigned int r_extern:1; + /* Four bits that aren't used, but when writing an object file + it is desirable to clear them. */ + unsigned int r_pad:4; +}; +#endif /* no N_RELOCATION_INFO_DECLARED. */ + + +#endif /* __A_OUT_GNU_H__ */ diff --git a/os/os/linux/include/asm/io.h b/os/os/linux/include/asm/io.h new file mode 100644 index 0000000..d5cc42a --- /dev/null +++ b/os/os/linux/include/asm/io.h @@ -0,0 +1,24 @@ +#define outb(value,port) \ +__asm__ ("outb %%al,%%dx"::"a" (value),"d" (port)) + + +#define inb(port) ({ \ +unsigned char _v; \ +__asm__ volatile ("inb %%dx,%%al":"=a" (_v):"d" (port)); \ +_v; \ +}) + +#define outb_p(value,port) \ +__asm__ ("outb %%al,%%dx\n" \ + "\tjmp 1f\n" \ + "1:\tjmp 1f\n" \ + "1:"::"a" (value),"d" (port)) + +#define inb_p(port) ({ \ +unsigned char _v; \ +__asm__ volatile ("inb %%dx,%%al\n" \ + "\tjmp 1f\n" \ + "1:\tjmp 1f\n" \ + "1:":"=a" (_v):"d" (port)); \ +_v; \ +}) diff --git a/os/os/linux/include/asm/memory.h b/os/os/linux/include/asm/memory.h new file mode 100644 index 0000000..51b69e7 --- /dev/null +++ b/os/os/linux/include/asm/memory.h @@ -0,0 +1,15 @@ +/* + * NOTE!!! memcpy(dest,src,n) assumes ds=es=normal data segment. This + * goes for all kernel functions (ds=es=kernel space, fs=local data, + * gs=null), as well as for all well-behaving user programs (ds=es= + * user data space). This is NOT a bug, as any user program that changes + * es deserves to die if it isn't careful. + */ +#define memcpy(dest,src,n) ({ \ +void * _res = dest; \ +__asm__ ("cld;rep;movsb" \ + ::"D" ((long)(_res)),"S" ((long)(src)),"c" ((long) (n)) \ + ); \ +_res; \ +}) + diff --git a/os/os/linux/include/asm/segment.h b/os/os/linux/include/asm/segment.h new file mode 100644 index 0000000..94dd102 --- /dev/null +++ b/os/os/linux/include/asm/segment.h @@ -0,0 +1,65 @@ +static inline unsigned char get_fs_byte(const char * addr) +{ + unsigned register char _v; + + __asm__ ("movb %%fs:%1,%0":"=r" (_v):"m" (*addr)); + return _v; +} + +static inline unsigned short get_fs_word(const unsigned short *addr) +{ + unsigned short _v; + + __asm__ ("movw %%fs:%1,%0":"=r" (_v):"m" (*addr)); + return _v; +} + +static inline unsigned long get_fs_long(const unsigned long *addr) +{ + unsigned long _v; + + __asm__ ("movl %%fs:%1,%0":"=r" (_v):"m" (*addr)); \ + return _v; +} + +static inline void put_fs_byte(char val,char *addr) +{ +__asm__ ("movb %0,%%fs:%1"::"r" (val),"m" (*addr)); +} + +static inline void put_fs_word(short val,short * addr) +{ +__asm__ ("movw %0,%%fs:%1"::"r" (val),"m" (*addr)); +} + +static inline void put_fs_long(unsigned long val,unsigned long * addr) +{ +__asm__ ("movl %0,%%fs:%1"::"r" (val),"m" (*addr)); +} + +/* + * Someone who knows GNU asm better than I should double check the followig. + * It seems to work, but I don't know if I'm doing something subtly wrong. + * --- TYT, 11/24/91 + * [ nothing wrong here, Linus ] + */ + +static inline unsigned long get_fs() +{ + unsigned short _v; + __asm__("mov %%fs,%%ax":"=a" (_v):); + return _v; +} + +static inline unsigned long get_ds() +{ + unsigned short _v; + __asm__("mov %%ds,%%ax":"=a" (_v):); + return _v; +} + +static inline void set_fs(unsigned long val) +{ + __asm__("mov %0,%%fs"::"a" ((unsigned short) val)); +} + diff --git a/os/os/linux/include/asm/system.h b/os/os/linux/include/asm/system.h new file mode 100644 index 0000000..0b5a21d --- /dev/null +++ b/os/os/linux/include/asm/system.h @@ -0,0 +1,66 @@ +#define move_to_user_mode() \ +__asm__ ("movl %%esp,%%eax\n\t" \ + "pushl $0x17\n\t" \ + "pushl %%eax\n\t" \ + "pushfl\n\t" \ + "pushl $0x0f\n\t" \ + "pushl $1f\n\t" \ + "iret\n" \ + "1:\tmovl $0x17,%%eax\n\t" \ + "movw %%ax,%%ds\n\t" \ + "movw %%ax,%%es\n\t" \ + "movw %%ax,%%fs\n\t" \ + "movw %%ax,%%gs" \ + :::"ax") + +#define sti() __asm__ ("sti"::) +#define cli() __asm__ ("cli"::) +#define nop() __asm__ ("nop"::) + +#define iret() __asm__ ("iret"::) + +#define _set_gate(gate_addr,type,dpl,addr) \ +__asm__ ("movw %%dx,%%ax\n\t" \ + "movw %0,%%dx\n\t" \ + "movl %%eax,%1\n\t" \ + "movl %%edx,%2" \ + : \ + : "i" ((short) (0x8000+(dpl<<13)+(type<<8))), \ + "o" (*((char *) (gate_addr))), \ + "o" (*(4+(char *) (gate_addr))), \ + "d" ((char *) (addr)),"a" (0x00080000)) + +#define set_intr_gate(n,addr) \ + _set_gate(&idt[n],14,0,addr) + +#define set_trap_gate(n,addr) \ + _set_gate(&idt[n],15,0,addr) + +#define set_system_gate(n,addr) \ + _set_gate(&idt[n],15,3,addr) + +#define _set_seg_desc(gate_addr,type,dpl,base,limit) {\ + *(gate_addr) = ((base) & 0xff000000) | \ + (((base) & 0x00ff0000)>>16) | \ + ((limit) & 0xf0000) | \ + ((dpl)<<13) | \ + (0x00408000) | \ + ((type)<<8); \ + *((gate_addr)+1) = (((base) & 0x0000ffff)<<16) | \ + ((limit) & 0x0ffff); } + +#define _set_tssldt_desc(n,addr,type) \ +__asm__ ("movw $104,%1\n\t" \ + "movw %%ax,%2\n\t" \ + "rorl $16,%%eax\n\t" \ + "movb %%al,%3\n\t" \ + "movb $" type ",%4\n\t" \ + "movb $0x00,%5\n\t" \ + "movb %%ah,%6\n\t" \ + "rorl $16,%%eax" \ + ::"a" (addr), "m" (*(n)), "m" (*(n+2)), "m" (*(n+4)), \ + "m" (*(n+5)), "m" (*(n+6)), "m" (*(n+7)) \ + ) + +#define set_tss_desc(n,addr) _set_tssldt_desc(((char *) (n)),addr,"0x89") +#define set_ldt_desc(n,addr) _set_tssldt_desc(((char *) (n)),addr,"0x82") diff --git a/os/os/linux/include/const.h b/os/os/linux/include/const.h new file mode 100644 index 0000000..7828e61 --- /dev/null +++ b/os/os/linux/include/const.h @@ -0,0 +1,15 @@ +#ifndef _CONST_H +#define _CONST_H + +#define BUFFER_END 0x200000 + +#define I_TYPE 0170000 +#define I_DIRECTORY 0040000 +#define I_REGULAR 0100000 +#define I_BLOCK_SPECIAL 0060000 +#define I_CHAR_SPECIAL 0020000 +#define I_NAMED_PIPE 0010000 +#define I_SET_UID_BIT 0004000 +#define I_SET_GID_BIT 0002000 + +#endif diff --git a/os/os/linux/include/ctype.h b/os/os/linux/include/ctype.h new file mode 100644 index 0000000..7acf55d --- /dev/null +++ b/os/os/linux/include/ctype.h @@ -0,0 +1,34 @@ +#ifndef _CTYPE_H +#define _CTYPE_H + +#define _U 0x01 /* upper */ +#define _L 0x02 /* lower */ +#define _D 0x04 /* digit */ +#define _C 0x08 /* cntrl */ +#define _P 0x10 /* punct */ +#define _S 0x20 /* white space (space/lf/tab) */ +#define _X 0x40 /* hex digit */ +#define _SP 0x80 /* hard space (0x20) */ + +extern unsigned char _ctype[]; +extern char _ctmp; + +#define isalnum(c) ((_ctype+1)[c]&(_U|_L|_D)) +#define isalpha(c) ((_ctype+1)[c]&(_U|_L)) +#define iscntrl(c) ((_ctype+1)[c]&(_C)) +#define isdigit(c) ((_ctype+1)[c]&(_D)) +#define isgraph(c) ((_ctype+1)[c]&(_P|_U|_L|_D)) +#define islower(c) ((_ctype+1)[c]&(_L)) +#define isprint(c) ((_ctype+1)[c]&(_P|_U|_L|_D|_SP)) +#define ispunct(c) ((_ctype+1)[c]&(_P)) +#define isspace(c) ((_ctype+1)[c]&(_S)) +#define isupper(c) ((_ctype+1)[c]&(_U)) +#define isxdigit(c) ((_ctype+1)[c]&(_D|_X)) + +#define isascii(c) (((unsigned) c)<=0x7f) +#define toascii(c) (((unsigned) c)&0x7f) + +#define tolower(c) (_ctmp=c,isupper(_ctmp)?_ctmp-('A'-'a'):_ctmp) +#define toupper(c) (_ctmp=c,islower(_ctmp)?_ctmp-('a'-'A'):_ctmp) + +#endif diff --git a/os/os/linux/include/errno.h b/os/os/linux/include/errno.h new file mode 100644 index 0000000..c282f69 --- /dev/null +++ b/os/os/linux/include/errno.h @@ -0,0 +1,60 @@ +#ifndef _ERRNO_H +#define _ERRNO_H + +/* + * ok, as I hadn't got any other source of information about + * possible error numbers, I was forced to use the same numbers + * as minix. + * Hopefully these are posix or something. I wouldn't know (and posix + * isn't telling me - they want $$$ for their f***ing standard). + * + * We don't use the _SIGN cludge of minix, so kernel returns must + * see to the sign by themselves. + * + * NOTE! Remember to change strerror() if you change this file! + */ + +extern int errno; + +#define ERROR 99 +#define EPERM 1 +#define ENOENT 2 +#define ESRCH 3 +#define EINTR 4 +#define EIO 5 +#define ENXIO 6 +#define E2BIG 7 +#define ENOEXEC 8 +#define EBADF 9 +#define ECHILD 10 +#define EAGAIN 11 +#define ENOMEM 12 +#define EACCES 13 +#define EFAULT 14 +#define ENOTBLK 15 +#define EBUSY 16 +#define EEXIST 17 +#define EXDEV 18 +#define ENODEV 19 +#define ENOTDIR 20 +#define EISDIR 21 +#define EINVAL 22 +#define ENFILE 23 +#define EMFILE 24 +#define ENOTTY 25 +#define ETXTBSY 26 +#define EFBIG 27 +#define ENOSPC 28 +#define ESPIPE 29 +#define EROFS 30 +#define EMLINK 31 +#define EPIPE 32 +#define EDOM 33 +#define ERANGE 34 +#define EDEADLK 35 +#define ENAMETOOLONG 36 +#define ENOLCK 37 +#define ENOSYS 38 +#define ENOTEMPTY 39 + +#endif diff --git a/os/os/linux/include/fcntl.h b/os/os/linux/include/fcntl.h new file mode 100644 index 0000000..a5bf9af --- /dev/null +++ b/os/os/linux/include/fcntl.h @@ -0,0 +1,55 @@ +#ifndef _FCNTL_H +#define _FCNTL_H + +#include + +/* open/fcntl - NOCTTY, NDELAY isn't implemented yet */ +#define O_ACCMODE 00003 +#define O_RDONLY 00 +#define O_WRONLY 01 +#define O_RDWR 02 +#define O_CREAT 00100 /* not fcntl */ +#define O_EXCL 00200 /* not fcntl */ +#define O_NOCTTY 00400 /* not fcntl */ +#define O_TRUNC 01000 /* not fcntl */ +#define O_APPEND 02000 +#define O_NONBLOCK 04000 /* not fcntl */ +#define O_NDELAY O_NONBLOCK + +/* Defines for fcntl-commands. Note that currently + * locking isn't supported, and other things aren't really + * tested. + */ +#define F_DUPFD 0 /* dup */ +#define F_GETFD 1 /* get f_flags */ +#define F_SETFD 2 /* set f_flags */ +#define F_GETFL 3 /* more flags (cloexec) */ +#define F_SETFL 4 +#define F_GETLK 5 /* not implemented */ +#define F_SETLK 6 +#define F_SETLKW 7 + +/* for F_[GET|SET]FL */ +#define FD_CLOEXEC 1 /* actually anything with low bit set goes */ + +/* Ok, these are locking features, and aren't implemented at any + * level. POSIX wants them. + */ +#define F_RDLCK 0 +#define F_WRLCK 1 +#define F_UNLCK 2 + +/* Once again - not implemented, but ... */ +struct flock { + short l_type; + short l_whence; + off_t l_start; + off_t l_len; + pid_t l_pid; +}; + +extern int creat(const char * filename,mode_t mode); +extern int fcntl(int fildes,int cmd, ...); +extern int open(const char * filename, int flags, ...); + +#endif diff --git a/os/os/linux/include/linux/config.h b/os/os/linux/include/linux/config.h new file mode 100644 index 0000000..c979fb3 --- /dev/null +++ b/os/os/linux/include/linux/config.h @@ -0,0 +1,48 @@ +#ifndef _CONFIG_H +#define _CONFIG_H + +/* + * The root-device is no longer hard-coded. You can change the default + * root-device by changing the line ROOT_DEV = XXX in boot/bootsect.s + */ + +/* + * define your keyboard here - + * KBD_FINNISH for Finnish keyboards + * KBD_US for US-type + * KBD_GR for German keyboards + * KBD_FR for Frech keyboard + */ +#define KBD_US +/*#define KBD_GR */ +/*#define KBD_FR */ +/*#define KBD_FINNISH */ + +/* + * Normally, Linux can get the drive parameters from the BIOS at + * startup, but if this for some unfathomable reason fails, you'd + * be left stranded. For this case, you can define HD_TYPE, which + * contains all necessary info on your harddisk. + * + * The HD_TYPE macro should look like this: + * + * #define HD_TYPE { head, sect, cyl, wpcom, lzone, ctl} + * + * In case of two harddisks, the info should be sepatated by + * commas: + * + * #define HD_TYPE { h,s,c,wpcom,lz,ctl },{ h,s,c,wpcom,lz,ctl } + */ +/* + This is an example, two drives, first is type 2, second is type 3: + +#define HD_TYPE { 4,17,615,300,615,8 }, { 6,17,615,300,615,0 } + + NOTE: ctl is 0 for all drives with heads<=8, and ctl=8 for drives + with more than 8 heads. + + If you want the BIOS to tell what kind of drive you have, just + leave HD_TYPE undefined. This is the normal thing to do. +*/ + +#endif diff --git a/os/os/linux/include/linux/fdreg.h b/os/os/linux/include/linux/fdreg.h new file mode 100644 index 0000000..01355af --- /dev/null +++ b/os/os/linux/include/linux/fdreg.h @@ -0,0 +1,71 @@ +/* + * This file contains some defines for the floppy disk controller. + * Various sources. Mostly "IBM Microcomputers: A Programmers + * Handbook", Sanches and Canton. + */ +#ifndef _FDREG_H +#define _FDREG_H + +extern int ticks_to_floppy_on(unsigned int nr); +extern void floppy_on(unsigned int nr); +extern void floppy_off(unsigned int nr); +extern void floppy_select(unsigned int nr); +extern void floppy_deselect(unsigned int nr); + +/* Fd controller regs. S&C, about page 340 */ +#define FD_STATUS 0x3f4 +#define FD_DATA 0x3f5 +#define FD_DOR 0x3f2 /* Digital Output Register */ +#define FD_DIR 0x3f7 /* Digital Input Register (read) */ +#define FD_DCR 0x3f7 /* Diskette Control Register (write)*/ + +/* Bits of main status register */ +#define STATUS_BUSYMASK 0x0F /* drive busy mask */ +#define STATUS_BUSY 0x10 /* FDC busy */ +#define STATUS_DMA 0x20 /* 0- DMA mode */ +#define STATUS_DIR 0x40 /* 0- cpu->fdc */ +#define STATUS_READY 0x80 /* Data reg ready */ + +/* Bits of FD_ST0 */ +#define ST0_DS 0x03 /* drive select mask */ +#define ST0_HA 0x04 /* Head (Address) */ +#define ST0_NR 0x08 /* Not Ready */ +#define ST0_ECE 0x10 /* Equipment chech error */ +#define ST0_SE 0x20 /* Seek end */ +#define ST0_INTR 0xC0 /* Interrupt code mask */ + +/* Bits of FD_ST1 */ +#define ST1_MAM 0x01 /* Missing Address Mark */ +#define ST1_WP 0x02 /* Write Protect */ +#define ST1_ND 0x04 /* No Data - unreadable */ +#define ST1_OR 0x10 /* OverRun */ +#define ST1_CRC 0x20 /* CRC error in data or addr */ +#define ST1_EOC 0x80 /* End Of Cylinder */ + +/* Bits of FD_ST2 */ +#define ST2_MAM 0x01 /* Missing Addess Mark (again) */ +#define ST2_BC 0x02 /* Bad Cylinder */ +#define ST2_SNS 0x04 /* Scan Not Satisfied */ +#define ST2_SEH 0x08 /* Scan Equal Hit */ +#define ST2_WC 0x10 /* Wrong Cylinder */ +#define ST2_CRC 0x20 /* CRC error in data field */ +#define ST2_CM 0x40 /* Control Mark = deleted */ + +/* Bits of FD_ST3 */ +#define ST3_HA 0x04 /* Head (Address) */ +#define ST3_TZ 0x10 /* Track Zero signal (1=track 0) */ +#define ST3_WP 0x40 /* Write Protect */ + +/* Values for FD_COMMAND */ +#define FD_RECALIBRATE 0x07 /* move to track 0 */ +#define FD_SEEK 0x0F /* seek track */ +#define FD_READ 0xE6 /* read with MT, MFM, SKip deleted */ +#define FD_WRITE 0xC5 /* write with MT, MFM */ +#define FD_SENSEI 0x08 /* Sense Interrupt Status */ +#define FD_SPECIFY 0x03 /* specify HUT etc */ + +/* DMA commands */ +#define DMA_READ 0x46 +#define DMA_WRITE 0x4A + +#endif diff --git a/os/os/linux/include/linux/fs.h b/os/os/linux/include/linux/fs.h new file mode 100644 index 0000000..7a90b10 --- /dev/null +++ b/os/os/linux/include/linux/fs.h @@ -0,0 +1,202 @@ +/* + * This file has definitions for some important file table + * structures etc. + */ + +#ifndef _FS_H +#define _FS_H + +#include + +/* devices are as follows: (same as minix, so we can use the minix + * file system. These are major numbers.) + * + * 0 - unused (nodev) + * 1 - /dev/mem + * 2 - /dev/fd + * 3 - /dev/hd + * 4 - /dev/ttyx + * 5 - /dev/tty + * 6 - /dev/lp + * 7 - unnamed pipes + */ + +#define IS_SEEKABLE(x) ((x)>=1 && (x)<=3) + +#define READ 0 +#define WRITE 1 +#define READA 2 /* read-ahead - don't pause */ +#define WRITEA 3 /* "write-ahead" - silly, but somewhat useful */ + +void buffer_init(long buffer_end); + +#define MAJOR(a) (((unsigned)(a))>>8) +#define MINOR(a) ((a)&0xff) + +#define NAME_LEN 14 +#define ROOT_INO 1 + +#define I_MAP_SLOTS 8 +#define Z_MAP_SLOTS 8 +#define SUPER_MAGIC 0x137F + +#define NR_OPEN 20 +#define NR_INODE 32 +#define NR_FILE 64 +#define NR_SUPER 8 +#define NR_HASH 307 +#define NR_BUFFERS nr_buffers +#define BLOCK_SIZE 1024 +#define BLOCK_SIZE_BITS 10 +#ifndef NULL +#define NULL ((void *) 0) +#endif + +#define INODES_PER_BLOCK ((BLOCK_SIZE)/(sizeof (struct d_inode))) +#define DIR_ENTRIES_PER_BLOCK ((BLOCK_SIZE)/(sizeof (struct dir_entry))) + +#define PIPE_HEAD(inode) ((inode).i_zone[0]) +#define PIPE_TAIL(inode) ((inode).i_zone[1]) +#define PIPE_SIZE(inode) ((PIPE_HEAD(inode)-PIPE_TAIL(inode))&(PAGE_SIZE-1)) +#define PIPE_EMPTY(inode) (PIPE_HEAD(inode)==PIPE_TAIL(inode)) +#define PIPE_FULL(inode) (PIPE_SIZE(inode)==(PAGE_SIZE-1)) +#define INC_PIPE(head) \ +__asm__("incl %0\n\tandl $4095,%0"::"m" (head)) + +typedef char buffer_block[BLOCK_SIZE]; + +struct buffer_head { + char * b_data; /* pointer to data block (1024 bytes) */ + unsigned long b_blocknr; /* block number */ + unsigned short b_dev; /* device (0 = free) */ + unsigned char b_uptodate; + unsigned char b_dirt; /* 0-clean,1-dirty */ + unsigned char b_count; /* users using this block */ + unsigned char b_lock; /* 0 - ok, 1 -locked */ + struct task_struct * b_wait; + struct buffer_head * b_prev; + struct buffer_head * b_next; + struct buffer_head * b_prev_free; + struct buffer_head * b_next_free; +}; + +struct d_inode { + unsigned short i_mode; + unsigned short i_uid; + unsigned long i_size; + unsigned long i_time; + unsigned char i_gid; + unsigned char i_nlinks; + unsigned short i_zone[9]; +}; + +struct m_inode { + unsigned short i_mode; + unsigned short i_uid; + unsigned long i_size; + unsigned long i_mtime; + unsigned char i_gid; + unsigned char i_nlinks; + unsigned short i_zone[9]; +/* these are in memory also */ + struct task_struct * i_wait; + unsigned long i_atime; + unsigned long i_ctime; + unsigned short i_dev; + unsigned short i_num; + unsigned short i_count; + unsigned char i_lock; + unsigned char i_dirt; + unsigned char i_pipe; + unsigned char i_mount; + unsigned char i_seek; + unsigned char i_update; +}; + +struct file { + unsigned short f_mode; + unsigned short f_flags; + unsigned short f_count; + struct m_inode * f_inode; + off_t f_pos; +}; + +struct super_block { + unsigned short s_ninodes; + unsigned short s_nzones; + unsigned short s_imap_blocks; + unsigned short s_zmap_blocks; + unsigned short s_firstdatazone; + unsigned short s_log_zone_size; + unsigned long s_max_size; + unsigned short s_magic; +/* These are only in memory */ + struct buffer_head * s_imap[8]; + struct buffer_head * s_zmap[8]; + unsigned short s_dev; + struct m_inode * s_isup; + struct m_inode * s_imount; + unsigned long s_time; + struct task_struct * s_wait; + unsigned char s_lock; + unsigned char s_rd_only; + unsigned char s_dirt; +}; + +struct d_super_block { + unsigned short s_ninodes; + unsigned short s_nzones; + unsigned short s_imap_blocks; + unsigned short s_zmap_blocks; + unsigned short s_firstdatazone; + unsigned short s_log_zone_size; + unsigned long s_max_size; + unsigned short s_magic; +}; + +struct dir_entry { + unsigned short inode; + char name[NAME_LEN]; +}; + +extern struct m_inode inode_table[NR_INODE]; +extern struct file file_table[NR_FILE]; +extern struct super_block super_block[NR_SUPER]; +extern struct buffer_head * start_buffer; +extern int nr_buffers; + +extern void check_disk_change(int dev); +extern int floppy_change(unsigned int nr); +extern int ticks_to_floppy_on(unsigned int dev); +extern void floppy_on(unsigned int dev); +extern void floppy_off(unsigned int dev); +extern void truncate(struct m_inode * inode); +extern void sync_inodes(void); +extern void wait_on(struct m_inode * inode); +extern int bmap(struct m_inode * inode,int block); +extern int create_block(struct m_inode * inode,int block); +extern struct m_inode * namei(const char * pathname); +extern int open_namei(const char * pathname, int flag, int mode, + struct m_inode ** res_inode); +extern void iput(struct m_inode * inode); +extern struct m_inode * iget(int dev,int nr); +extern struct m_inode * get_empty_inode(void); +extern struct m_inode * get_pipe_inode(void); +extern struct buffer_head * get_hash_table(int dev, int block); +extern struct buffer_head * getblk(int dev, int block); +extern void ll_rw_block(int rw, struct buffer_head * bh); +extern void brelse(struct buffer_head * buf); +extern struct buffer_head * bread(int dev,int block); +extern void bread_page(unsigned long addr,int dev,int b[4]); +extern struct buffer_head * breada(int dev,int block,...); +extern int new_block(int dev); +extern void free_block(int dev, int block); +extern struct m_inode * new_inode(int dev); +extern void free_inode(struct m_inode * inode); +extern int sync_dev(int dev); +extern struct super_block * get_super(int dev); +extern int ROOT_DEV; + +extern void mount_root(void); + +#endif diff --git a/os/os/linux/include/linux/hdreg.h b/os/os/linux/include/linux/hdreg.h new file mode 100644 index 0000000..e6c593f --- /dev/null +++ b/os/os/linux/include/linux/hdreg.h @@ -0,0 +1,65 @@ +/* + * This file contains some defines for the AT-hd-controller. + * Various sources. Check out some definitions (see comments with + * a ques). + */ +#ifndef _HDREG_H +#define _HDREG_H + +/* Hd controller regs. Ref: IBM AT Bios-listing */ +#define HD_DATA 0x1f0 /* _CTL when writing */ +#define HD_ERROR 0x1f1 /* see err-bits */ +#define HD_NSECTOR 0x1f2 /* nr of sectors to read/write */ +#define HD_SECTOR 0x1f3 /* starting sector */ +#define HD_LCYL 0x1f4 /* starting cylinder */ +#define HD_HCYL 0x1f5 /* high byte of starting cyl */ +#define HD_CURRENT 0x1f6 /* 101dhhhh , d=drive, hhhh=head */ +#define HD_STATUS 0x1f7 /* see status-bits */ +#define HD_PRECOMP HD_ERROR /* same io address, read=error, write=precomp */ +#define HD_COMMAND HD_STATUS /* same io address, read=status, write=cmd */ + +#define HD_CMD 0x3f6 + +/* Bits of HD_STATUS */ +#define ERR_STAT 0x01 +#define INDEX_STAT 0x02 +#define ECC_STAT 0x04 /* Corrected error */ +#define DRQ_STAT 0x08 +#define SEEK_STAT 0x10 +#define WRERR_STAT 0x20 +#define READY_STAT 0x40 +#define BUSY_STAT 0x80 + +/* Values for HD_COMMAND */ +#define WIN_RESTORE 0x10 +#define WIN_READ 0x20 +#define WIN_WRITE 0x30 +#define WIN_VERIFY 0x40 +#define WIN_FORMAT 0x50 +#define WIN_INIT 0x60 +#define WIN_SEEK 0x70 +#define WIN_DIAGNOSE 0x90 +#define WIN_SPECIFY 0x91 + +/* Bits for HD_ERROR */ +#define MARK_ERR 0x01 /* Bad address mark ? */ +#define TRK0_ERR 0x02 /* couldn't find track 0 */ +#define ABRT_ERR 0x04 /* ? */ +#define ID_ERR 0x10 /* ? */ +#define ECC_ERR 0x40 /* ? */ +#define BBD_ERR 0x80 /* ? */ + +struct partition { + unsigned char boot_ind; /* 0x80 - active (unused) */ + unsigned char head; /* ? */ + unsigned char sector; /* ? */ + unsigned char cyl; /* ? */ + unsigned char sys_ind; /* ? */ + unsigned char end_head; /* ? */ + unsigned char end_sector; /* ? */ + unsigned char end_cyl; /* ? */ + unsigned int start_sect; /* starting sector counting from 0 */ + unsigned int nr_sects; /* nr of sectors in partition */ +}; + +#endif diff --git a/os/os/linux/include/linux/head.h b/os/os/linux/include/linux/head.h new file mode 100644 index 0000000..db3dda2 --- /dev/null +++ b/os/os/linux/include/linux/head.h @@ -0,0 +1,20 @@ +#ifndef _HEAD_H +#define _HEAD_H + +typedef struct desc_struct { + unsigned long a,b; +} desc_table[256]; + +extern unsigned long pg_dir[1024]; +extern desc_table idt,gdt; + +#define GDT_NUL 0 +#define GDT_CODE 1 +#define GDT_DATA 2 +#define GDT_TMP 3 + +#define LDT_NUL 0 +#define LDT_CODE 1 +#define LDT_DATA 2 + +#endif diff --git a/os/os/linux/include/linux/kernel.h b/os/os/linux/include/linux/kernel.h new file mode 100644 index 0000000..cb40dd5 --- /dev/null +++ b/os/os/linux/include/linux/kernel.h @@ -0,0 +1,22 @@ +/* + * 'kernel.h' contains some often-used function prototypes etc + */ +void verify_area(void * addr,int count); +volatile void panic(const char * str); +int printf(const char * fmt, ...); +int printk(const char * fmt, ...); +int tty_write(unsigned ch,char * buf,int count); +void * malloc(unsigned int size); +void free_s(void * obj, int size); + +#define free(x) free_s((x), 0) + +/* + * This is defined as a macro, but at some point this might become a + * real subroutine that sets a flag if it returns true (to do + * BSD-style accounting where the process is flagged if it uses root + * privs). The implication of this is that you should do normal + * permissions checks first, and check suser() last. + */ +#define suser() (current->euid == 0) + diff --git a/os/os/linux/include/linux/mm.h b/os/os/linux/include/linux/mm.h new file mode 100644 index 0000000..5a160f3 --- /dev/null +++ b/os/os/linux/include/linux/mm.h @@ -0,0 +1,10 @@ +#ifndef _MM_H +#define _MM_H + +#define PAGE_SIZE 4096 + +extern unsigned long get_free_page(void); +extern unsigned long put_page(unsigned long page,unsigned long address); +extern void free_page(unsigned long addr); + +#endif diff --git a/os/os/linux/include/linux/sched.h b/os/os/linux/include/linux/sched.h new file mode 100644 index 0000000..772646a --- /dev/null +++ b/os/os/linux/include/linux/sched.h @@ -0,0 +1,239 @@ +#ifndef _SCHED_H +#define _SCHED_H + +#define NR_TASKS 64 +#define HZ 100 + +#define FIRST_TASK task[0] +#define LAST_TASK task[NR_TASKS-1] + +#include +#include +#include +#include + +#if (NR_OPEN > 32) +#error "Currently the close-on-exec-flags are in one word, max 32 files/proc" +#endif + +#define TASK_RUNNING 0 +#define TASK_INTERRUPTIBLE 1 +#define TASK_UNINTERRUPTIBLE 2 +#define TASK_ZOMBIE 3 +#define TASK_STOPPED 4 + +#ifndef NULL +#define NULL ((void *) 0) +#endif + +extern int copy_page_tables(unsigned long from, unsigned long to, long size); +extern int free_page_tables(unsigned long from, unsigned long size); + +extern void sched_init(void); +extern void schedule(void); +extern void trap_init(void); +extern void panic(const char * str); +extern int tty_write(unsigned minor,char * buf,int count); + +typedef int (*fn_ptr)(); + +struct i387_struct { + long cwd; + long swd; + long twd; + long fip; + long fcs; + long foo; + long fos; + long st_space[20]; /* 8*10 bytes for each FP-reg = 80 bytes */ +}; + +struct tss_struct { + long back_link; /* 16 high bits zero */ + long esp0; + long ss0; /* 16 high bits zero */ + long esp1; + long ss1; /* 16 high bits zero */ + long esp2; + long ss2; /* 16 high bits zero */ + long cr3; + long eip; + long eflags; + long eax,ecx,edx,ebx; + long esp; + long ebp; + long esi; + long edi; + long es; /* 16 high bits zero */ + long cs; /* 16 high bits zero */ + long ss; /* 16 high bits zero */ + long ds; /* 16 high bits zero */ + long fs; /* 16 high bits zero */ + long gs; /* 16 high bits zero */ + long ldt; /* 16 high bits zero */ + long trace_bitmap; /* bits: trace 0, bitmap 16-31 */ + struct i387_struct i387; +}; + +struct task_struct { +/* these are hardcoded - don't touch */ + long state; /* -1 unrunnable, 0 runnable, >0 stopped */ + long counter; + long priority; + long signal; + struct sigaction sigaction[32]; + long blocked; /* bitmap of masked signals */ +/* various fields */ + int exit_code; + unsigned long start_code,end_code,end_data,brk,start_stack; + long pid,father,pgrp,session,leader; + unsigned short uid,euid,suid; + unsigned short gid,egid,sgid; + long alarm; + long utime,stime,cutime,cstime,start_time; + unsigned short used_math; +/* file system info */ + int tty; /* -1 if no tty, so it must be signed */ + unsigned short umask; + struct m_inode * pwd; + struct m_inode * root; + struct m_inode * executable; + unsigned long close_on_exec; + struct file * filp[NR_OPEN]; +/* ldt for this task 0 - zero 1 - cs 2 - ds&ss */ + struct desc_struct ldt[3]; +/* tss for this task */ + struct tss_struct tss; +}; + +/* + * INIT_TASK is used to set up the first task table, touch at + * your own risk!. Base=0, limit=0x9ffff (=640kB) + */ +#define INIT_TASK \ +/* state etc */ { 0,15,15, \ +/* signals */ 0,{{},},0, \ +/* ec,brk... */ 0,0,0,0,0,0, \ +/* pid etc.. */ 0,-1,0,0,0, \ +/* uid etc */ 0,0,0,0,0,0, \ +/* alarm */ 0,0,0,0,0,0, \ +/* math */ 0, \ +/* fs info */ -1,0022,NULL,NULL,NULL,0, \ +/* filp */ {NULL,}, \ + { \ + {0,0}, \ +/* ldt */ {0x9f,0xc0fa00}, \ + {0x9f,0xc0f200}, \ + }, \ +/*tss*/ {0,PAGE_SIZE+(long)&init_task,0x10,0,0,0,0,(long)&pg_dir,\ + 0,0,0,0,0,0,0,0, \ + 0,0,0x17,0x17,0x17,0x17,0x17,0x17, \ + _LDT(0),0x80000000, \ + {} \ + }, \ +} + +extern struct task_struct *task[NR_TASKS]; +extern struct task_struct *last_task_used_math; +extern struct task_struct *current; +extern long volatile jiffies; +extern long startup_time; + +#define CURRENT_TIME (startup_time+jiffies/HZ) + +extern void add_timer(long jiffies, void (*fn)(void)); +extern void sleep_on(struct task_struct ** p); +extern void interruptible_sleep_on(struct task_struct ** p); +extern void wake_up(struct task_struct ** p); + +/* + * Entry into gdt where to find first TSS. 0-nul, 1-cs, 2-ds, 3-syscall + * 4-TSS0, 5-LDT0, 6-TSS1 etc ... + */ +#define FIRST_TSS_ENTRY 4 +#define FIRST_LDT_ENTRY (FIRST_TSS_ENTRY+1) +#define _TSS(n) ((((unsigned long) n)<<4)+(FIRST_TSS_ENTRY<<3)) +#define _LDT(n) ((((unsigned long) n)<<4)+(FIRST_LDT_ENTRY<<3)) +#define ltr(n) __asm__("ltr %%ax"::"a" (_TSS(n))) +#define lldt(n) __asm__("lldt %%ax"::"a" (_LDT(n))) +#define str(n) \ +__asm__("str %%ax\n\t" \ + "subl %2,%%eax\n\t" \ + "shrl $4,%%eax" \ + :"=a" (n) \ + :"a" (0),"i" (FIRST_TSS_ENTRY<<3)) +/* + * switch_to(n) should switch tasks to task nr n, first + * checking that n isn't the current task, in which case it does nothing. + * This also clears the TS-flag if the task we switched to has used + * tha math co-processor latest. + */ +#define switch_to(n) {\ +struct {long a,b;} __tmp; \ +__asm__("cmpl %%ecx,current\n\t" \ + "je 1f\n\t" \ + "movw %%dx,%1\n\t" \ + "xchgl %%ecx,current\n\t" \ + "ljmp *%0\n\t" \ + "cmpl %%ecx,last_task_used_math\n\t" \ + "jne 1f\n\t" \ + "clts\n" \ + "1:" \ + ::"m" (*&__tmp.a),"m" (*&__tmp.b), \ + "d" (_TSS(n)),"c" ((long) task[n])); \ +} + +#define PAGE_ALIGN(n) (((n)+0xfff)&0xfffff000) + +#define _set_base(addr,base) \ +__asm__ ("push %%edx\n\t" \ + "movw %%dx,%0\n\t" \ + "rorl $16,%%edx\n\t" \ + "movb %%dl,%1\n\t" \ + "movb %%dh,%2\n\t" \ + "pop %%edx" \ + ::"m" (*((addr)+2)), \ + "m" (*((addr)+4)), \ + "m" (*((addr)+7)), \ + "d" (base) \ + ) + +#define _set_limit(addr,limit) \ +__asm__ ("push %%edx\n\t" \ + "movw %%dx,%0\n\t" \ + "rorl $16,%%edx\n\t" \ + "movb %1,%%dh\n\t" \ + "andb $0xf0,%%dh\n\t" \ + "orb %%dh,%%dl\n\t" \ + "movb %%dl,%1\n\t" \ + "pop %%edx" \ + ::"m" (*(addr)), \ + "m" (*((addr)+6)), \ + "d" (limit) \ + ) + +#define set_base(ldt,base) _set_base( ((char *)&(ldt)) , (base) ) +#define set_limit(ldt,limit) _set_limit( ((char *)&(ldt)) , (limit-1)>>12 ) + +static inline unsigned long _get_base(char * addr) +{ + unsigned long __base; + __asm__("movb %3,%%dh\n\t" + "movb %2,%%dl\n\t" + "shll $16,%%edx\n\t" + "movw %1,%%dx" + :"=&d" (__base) + :"m" (*((addr)+2)), + "m" (*((addr)+4)), + "m" (*((addr)+7))); + return __base; +} + +#define get_base(ldt) _get_base( ((char *)&(ldt)) ) + +#define get_limit(segment) ({ \ +unsigned long __limit; \ +__asm__("lsll %1,%0\n\tincl %0":"=r" (__limit):"r" (segment)); \ +__limit;}) + +#endif diff --git a/os/os/linux/include/linux/sys.h b/os/os/linux/include/linux/sys.h new file mode 100644 index 0000000..d1cb5bd --- /dev/null +++ b/os/os/linux/include/linux/sys.h @@ -0,0 +1,116 @@ +/* + * Why isn't this a .c file? Enquiring minds.... + */ + +extern int sys_setup(); +extern int sys_exit(); +extern int sys_fork(); +extern int sys_read(); +extern int sys_write(); +extern int sys_open(); +extern int sys_close(); +extern int sys_waitpid(); +extern int sys_creat(); +extern int sys_link(); +extern int sys_unlink(); +extern int sys_execve(); +extern int sys_chdir(); +extern int sys_time(); +extern int sys_mknod(); +extern int sys_chmod(); +extern int sys_chown(); +extern int sys_break(); +extern int sys_stat(); +extern int sys_lseek(); +extern int sys_getpid(); +extern int sys_mount(); +extern int sys_umount(); +extern int sys_setuid(); +extern int sys_getuid(); +extern int sys_stime(); +extern int sys_ptrace(); +extern int sys_alarm(); +extern int sys_fstat(); +extern int sys_pause(); +extern int sys_utime(); +extern int sys_stty(); +extern int sys_gtty(); +extern int sys_access(); +extern int sys_nice(); +extern int sys_ftime(); +extern int sys_sync(); +extern int sys_kill(); +extern int sys_rename(); +extern int sys_mkdir(); +extern int sys_rmdir(); +extern int sys_dup(); +extern int sys_pipe(); +extern int sys_times(); +extern int sys_prof(); +extern int sys_brk(); +extern int sys_setgid(); +extern int sys_getgid(); +extern int sys_signal(); +extern int sys_geteuid(); +extern int sys_getegid(); +extern int sys_acct(); +extern int sys_phys(); +extern int sys_lock(); +extern int sys_ioctl(); +extern int sys_fcntl(); +extern int sys_mpx(); +extern int sys_setpgid(); +extern int sys_ulimit(); +extern int sys_uname(); +extern int sys_umask(); +extern int sys_chroot(); +extern int sys_ustat(); +extern int sys_dup2(); +extern int sys_getppid(); +extern int sys_getpgrp(); +extern int sys_setsid(); +extern int sys_sigaction(); +extern int sys_sgetmask(); +extern int sys_ssetmask(); +extern int sys_setreuid(); +extern int sys_setregid(); +extern int sys_sigpending(); +extern int sys_sigsuspend(); +extern int sys_sethostname(); +extern int sys_setrlimit(); +extern int sys_getrlimit(); +extern int sys_getrusage(); +extern int sys_gettimeofday(); +extern int sys_settimeofday(); +extern int sys_getgroups(); +extern int sys_setgroups(); +extern int sys_select(); +extern int sys_symlink(); +extern int sys_lstat(); +extern int sys_readlink(); +extern int sys_uselib(); +extern int sys_execve2(); +extern int sys_getdents(); +extern int sys_pipe2(); +extern int sys_sleep(); +extern int sys_getcwd(); +fn_ptr sys_call_table[] = { sys_setup, sys_exit, sys_fork, sys_read, +sys_write, sys_open, sys_close, sys_waitpid, sys_creat, sys_link, +sys_unlink, sys_execve, sys_chdir, sys_time, sys_mknod, sys_chmod, +sys_chown, sys_break, sys_stat, sys_lseek, sys_getpid, sys_mount, +sys_umount, sys_setuid, sys_getuid, sys_stime, sys_ptrace, sys_alarm, +sys_fstat, sys_pause, sys_utime, sys_stty, sys_gtty, sys_access, +sys_nice, sys_ftime, sys_sync, sys_kill, sys_rename, sys_mkdir, +sys_rmdir, sys_dup, sys_pipe, sys_times, sys_prof, sys_brk, sys_setgid, +sys_getgid, sys_signal, sys_geteuid, sys_getegid, sys_acct, sys_phys, +sys_lock, sys_ioctl, sys_fcntl, sys_mpx, sys_setpgid, sys_ulimit, +sys_uname, sys_umask, sys_chroot, sys_ustat, sys_dup2, sys_getppid, +sys_getpgrp, sys_setsid, sys_sigaction, sys_sgetmask, sys_ssetmask, +sys_setreuid,sys_setregid, sys_sigsuspend, sys_sigpending, sys_sethostname, +sys_setrlimit, sys_getrlimit, sys_getrusage, sys_gettimeofday, +sys_settimeofday, sys_getgroups, sys_setgroups, sys_select, sys_symlink, +sys_lstat, sys_readlink, sys_uselib, sys_execve2, sys_getdents, sys_pipe2, +sys_sleep, sys_getcwd}; + +/* So we don't have to do any more manual updating.... */ +int NR_syscalls = sizeof(sys_call_table)/sizeof(fn_ptr); diff --git a/os/os/linux/include/linux/tty.h b/os/os/linux/include/linux/tty.h new file mode 100644 index 0000000..ad846b3 --- /dev/null +++ b/os/os/linux/include/linux/tty.h @@ -0,0 +1,77 @@ +/* + * 'tty.h' defines some structures used by tty_io.c and some defines. + * + * NOTE! Don't touch this without checking that nothing in rs_io.s or + * con_io.s breaks. Some constants are hardwired into the system (mainly + * offsets into 'tty_queue' + */ + +#ifndef _TTY_H +#define _TTY_H + +#include + +#define TTY_BUF_SIZE 1024 + +struct tty_queue { + unsigned long data; + unsigned long head; + unsigned long tail; + struct task_struct * proc_list; + char buf[TTY_BUF_SIZE]; +}; + +#define INC(a) ((a) = ((a)+1) & (TTY_BUF_SIZE-1)) +#define DEC(a) ((a) = ((a)-1) & (TTY_BUF_SIZE-1)) +#define EMPTY(a) ((a).head == (a).tail) +#define LEFT(a) (((a).tail-(a).head-1)&(TTY_BUF_SIZE-1)) +#define LAST(a) ((a).buf[(TTY_BUF_SIZE-1)&((a).head-1)]) +#define FULL(a) (!LEFT(a)) +#define CHARS(a) (((a).head-(a).tail)&(TTY_BUF_SIZE-1)) +#define GETCH(queue,c) \ +(void)({c=(queue).buf[(queue).tail];INC((queue).tail);}) +#define PUTCH(c,queue) \ +(void)({(queue).buf[(queue).head]=(c);INC((queue).head);}) + +#define INTR_CHAR(tty) ((tty)->termios.c_cc[VINTR]) +#define QUIT_CHAR(tty) ((tty)->termios.c_cc[VQUIT]) +#define ERASE_CHAR(tty) ((tty)->termios.c_cc[VERASE]) +#define KILL_CHAR(tty) ((tty)->termios.c_cc[VKILL]) +#define EOF_CHAR(tty) ((tty)->termios.c_cc[VEOF]) +#define START_CHAR(tty) ((tty)->termios.c_cc[VSTART]) +#define STOP_CHAR(tty) ((tty)->termios.c_cc[VSTOP]) +#define SUSPEND_CHAR(tty) ((tty)->termios.c_cc[VSUSP]) + +struct tty_struct { + struct termios termios; + int pgrp; + int stopped; + void (*write)(struct tty_struct * tty); + struct tty_queue read_q; + struct tty_queue write_q; + struct tty_queue secondary; + }; + +extern struct tty_struct tty_table[]; + +/* intr=^C quit=^| erase=del kill=^U + eof=^D vtime=\0 vmin=\1 sxtc=\0 + start=^Q stop=^S susp=^Z eol=\0 + reprint=^R discard=^U werase=^W lnext=^V + eol2=\0 +*/ +#define INIT_C_CC "\003\034\177\025\004\0\1\0\021\023\032\0\022\017\027\026\0" + +void rs_init(void); +void con_init(void); +void tty_init(void); + +int tty_read(unsigned c, char * buf, int n); +int tty_write(unsigned c, char * buf, int n); + +void rs_write(struct tty_struct * tty); +void con_write(struct tty_struct * tty); + +void copy_to_cooked(struct tty_struct * tty); + +#endif diff --git a/os/os/linux/include/new0.h b/os/os/linux/include/new0.h new file mode 100644 index 0000000..5f265eb --- /dev/null +++ b/os/os/linux/include/new0.h @@ -0,0 +1,30 @@ +#ifndef _NEW_H +#define _NEW_H + +#include + +struct linux_dirent { + long d_ino; + off_t d_off; + unsigned short d_reclen; + char d_name[14]; +}; + +/* Return value of `mmap' in case of an error. */ +#define MAP_FAILED ((void *) -1) + +#define PROT_READ 0x1 /* page can be read */ +#define PROT_WRITE 0x2 /* page can be written */ +#define PROT_EXEC 0x4 /* page can be executed */ +#define PROT_SEM 0x8 /* page may be used for atomic ops */ +#define PROT_NONE 0x0 /* page can not be accessed */ + +/* compatibility flags */ +#define MAP_FILE 0 + +#define MAP_SHARED 0x01 /* Share changes */ +#define MAP_PRIVATE 0x02 /* Changes are private */ + +#define CLONE_VM 0x00000100 /* set if VM shared between processes */ + +#endif \ No newline at end of file diff --git a/os/os/linux/include/signal.h b/os/os/linux/include/signal.h new file mode 100644 index 0000000..0eea9a3 --- /dev/null +++ b/os/os/linux/include/signal.h @@ -0,0 +1,68 @@ +#ifndef _SIGNAL_H +#define _SIGNAL_H + +#include + +typedef int sig_atomic_t; +typedef unsigned int sigset_t; /* 32 bits */ + +#define _NSIG 32 +#define NSIG _NSIG + +#define SIGHUP 1 +#define SIGINT 2 +#define SIGQUIT 3 +#define SIGILL 4 +#define SIGTRAP 5 +#define SIGABRT 6 +#define SIGIOT 6 +#define SIGUNUSED 7 +#define SIGFPE 8 +#define SIGKILL 9 +#define SIGUSR1 10 +#define SIGSEGV 11 +#define SIGUSR2 12 +#define SIGPIPE 13 +#define SIGALRM 14 +#define SIGTERM 15 +#define SIGSTKFLT 16 +#define SIGCHLD 17 +#define SIGCONT 18 +#define SIGSTOP 19 +#define SIGTSTP 20 +#define SIGTTIN 21 +#define SIGTTOU 22 + +/* Ok, I haven't implemented sigactions, but trying to keep headers POSIX */ +#define SA_NOCLDSTOP 1 +#define SA_NOMASK 0x40000000 +#define SA_ONESHOT 0x80000000 + +#define SIG_BLOCK 0 /* for blocking signals */ +#define SIG_UNBLOCK 1 /* for unblocking signals */ +#define SIG_SETMASK 2 /* for setting the signal mask */ + +#define SIG_DFL ((void (*)(int))0) /* default signal handling */ +#define SIG_IGN ((void (*)(int))1) /* ignore signal */ + +struct sigaction { + void (*sa_handler)(int); + sigset_t sa_mask; + int sa_flags; + void (*sa_restorer)(void); +}; + +void (*signal(int _sig, void (*_func)(int)))(int); +int raise(int sig); +int kill(pid_t pid, int sig); +int sigaddset(sigset_t *mask, int signo); +int sigdelset(sigset_t *mask, int signo); +int sigemptyset(sigset_t *mask); +int sigfillset(sigset_t *mask); +int sigismember(sigset_t *mask, int signo); /* 1 - is, 0 - not, -1 error */ +int sigpending(sigset_t *set); +int sigprocmask(int how, sigset_t *set, sigset_t *oldset); +int sigsuspend(sigset_t *sigmask); +int sigaction(int sig, struct sigaction *act, struct sigaction *oldact); + +#endif /* _SIGNAL_H */ diff --git a/os/os/linux/include/stdarg.h b/os/os/linux/include/stdarg.h new file mode 100644 index 0000000..fd79ec0 --- /dev/null +++ b/os/os/linux/include/stdarg.h @@ -0,0 +1,28 @@ +#ifndef _STDARG_H +#define _STDARG_H + +typedef char *va_list; + +/* Amount of space required in an argument list for an arg of type TYPE. + TYPE may alternatively be an expression whose type is used. */ + +#define __va_rounded_size(TYPE) \ + (((sizeof (TYPE) + sizeof (int) - 1) / sizeof (int)) * sizeof (int)) + +#ifndef __sparc__ +#define va_start(AP, LASTARG) \ + (AP = ((char *) &(LASTARG) + __va_rounded_size (LASTARG))) +#else +#define va_start(AP, LASTARG) \ + (__builtin_saveregs (), \ + AP = ((char *) &(LASTARG) + __va_rounded_size (LASTARG))) +#endif + +void va_end (va_list); /* Defined in gnulib */ +#define va_end(AP) + +#define va_arg(AP, TYPE) \ + (AP += __va_rounded_size (TYPE), \ + *((TYPE *) (AP - __va_rounded_size (TYPE)))) + +#endif /* _STDARG_H */ diff --git a/os/os/linux/include/stddef.h b/os/os/linux/include/stddef.h new file mode 100644 index 0000000..97f72ff --- /dev/null +++ b/os/os/linux/include/stddef.h @@ -0,0 +1,19 @@ +#ifndef _STDDEF_H +#define _STDDEF_H + +#ifndef _PTRDIFF_T +#define _PTRDIFF_T +typedef long ptrdiff_t; +#endif + +#ifndef _SIZE_T +#define _SIZE_T +typedef unsigned long size_t; +#endif + +#undef NULL +#define NULL ((void *)0) + +#define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER) + +#endif diff --git a/os/os/linux/include/string.h b/os/os/linux/include/string.h new file mode 100644 index 0000000..48b91e5 --- /dev/null +++ b/os/os/linux/include/string.h @@ -0,0 +1,405 @@ +#ifndef _STRING_H_ +#define _STRING_H_ + +#ifndef NULL +#define NULL ((void *) 0) +#endif + +#ifndef _SIZE_T +#define _SIZE_T +typedef unsigned int size_t; +#endif + +extern char * strerror(int errno); + +/* + * This string-include defines all string functions as inline + * functions. Use gcc. It also assumes ds=es=data space, this should be + * normal. Most of the string-functions are rather heavily hand-optimized, + * see especially strtok,strstr,str[c]spn. They should work, but are not + * very easy to understand. Everything is done entirely within the register + * set, making the functions fast and clean. String instructions have been + * used through-out, making for "slightly" unclear code :-) + * + * (C) 1991 Linus Torvalds + */ + +extern inline char * strcpy(char * dest,const char *src) +{ +__asm__("cld\n" + "1:\tlodsb\n\t" + "stosb\n\t" + "testb %%al,%%al\n\t" + "jne 1b" + ::"S" (src),"D" (dest)); +return dest; +} + +extern inline char * strncpy(char * dest,const char *src,int count) +{ +__asm__("cld\n" + "1:\tdecl %2\n\t" + "js 2f\n\t" + "lodsb\n\t" + "stosb\n\t" + "testb %%al,%%al\n\t" + "jne 1b\n\t" + "rep\n\t" + "stosb\n" + "2:" + ::"S" (src),"D" (dest),"c" (count)); +return dest; +} + +extern inline char * strcat(char * dest,const char * src) +{ +__asm__("cld\n\t" + "repne\n\t" + "scasb\n\t" + "decl %1\n" + "1:\tlodsb\n\t" + "stosb\n\t" + "testb %%al,%%al\n\t" + "jne 1b" + ::"S" (src),"D" (dest),"a" (0),"c" (0xffffffff)); +return dest; +} + +extern inline char * strncat(char * dest,const char * src,int count) +{ +__asm__("cld\n\t" + "repne\n\t" + "scasb\n\t" + "decl %1\n\t" + "movl %4,%3\n" + "1:\tdecl %3\n\t" + "js 2f\n\t" + "lodsb\n\t" + "stosb\n\t" + "testb %%al,%%al\n\t" + "jne 1b\n" + "2:\txorl %2,%2\n\t" + "stosb" + ::"S" (src),"D" (dest),"a" (0),"c" (0xffffffff),"g" (count) + ); +return dest; +} + +extern inline int strcmp(const char * cs,const char * ct) +{ +register int __res __asm__("ax"); +__asm__("cld\n" + "1:\tlodsb\n\t" + "scasb\n\t" + "jne 2f\n\t" + "testb %%al,%%al\n\t" + "jne 1b\n\t" + "xorl %%eax,%%eax\n\t" + "jmp 3f\n" + "2:\tmovl $1,%%eax\n\t" + "jl 3f\n\t" + "negl %%eax\n" + "3:" + :"=a" (__res):"D" (cs),"S" (ct)); +return __res; +} + +extern inline int strncmp(const char * cs,const char * ct,int count) +{ +register int __res __asm__("ax"); +__asm__("cld\n" + "1:\tdecl %3\n\t" + "js 2f\n\t" + "lodsb\n\t" + "scasb\n\t" + "jne 3f\n\t" + "testb %%al,%%al\n\t" + "jne 1b\n" + "2:\txorl %%eax,%%eax\n\t" + "jmp 4f\n" + "3:\tmovl $1,%%eax\n\t" + "jl 4f\n\t" + "negl %%eax\n" + "4:" + :"=a" (__res):"D" (cs),"S" (ct),"c" (count)); +return __res; +} + +extern inline char * strchr(const char * s,char c) +{ +register char * __res __asm__("ax"); +__asm__("cld\n\t" + "movb %%al,%%ah\n" + "1:\tlodsb\n\t" + "cmpb %%ah,%%al\n\t" + "je 2f\n\t" + "testb %%al,%%al\n\t" + "jne 1b\n\t" + "movl $1,%1\n" + "2:\tmovl %1,%0\n\t" + "decl %0" + :"=a" (__res):"S" (s),"0" (c)); +return __res; +} + +extern inline char * strrchr(const char * s,char c) +{ +register char * __res __asm__("dx"); +__asm__("cld\n\t" + "movb %%al,%%ah\n" + "1:\tlodsb\n\t" + "cmpb %%ah,%%al\n\t" + "jne 2f\n\t" + "movl %%esi,%0\n\t" + "decl %0\n" + "2:\ttestb %%al,%%al\n\t" + "jne 1b" + :"=d" (__res):"0" (0),"S" (s),"a" (c)); +return __res; +} + +extern inline int strspn(const char * cs, const char * ct) +{ +register char * __res __asm__("si"); +__asm__("cld\n\t" + "movl %4,%%edi\n\t" + "repne\n\t" + "scasb\n\t" + "notl %%ecx\n\t" + "decl %%ecx\n\t" + "movl %%ecx,%%edx\n" + "1:\tlodsb\n\t" + "testb %%al,%%al\n\t" + "je 2f\n\t" + "movl %4,%%edi\n\t" + "movl %%edx,%%ecx\n\t" + "repne\n\t" + "scasb\n\t" + "je 1b\n" + "2:\tdecl %0" + :"=S" (__res):"a" (0),"c" (0xffffffff),"0" (cs),"g" (ct) + ); +return __res-cs; +} + +extern inline int strcspn(const char * cs, const char * ct) +{ +register char * __res __asm__("si"); +__asm__("cld\n\t" + "movl %4,%%edi\n\t" + "repne\n\t" + "scasb\n\t" + "notl %%ecx\n\t" + "decl %%ecx\n\t" + "movl %%ecx,%%edx\n" + "1:\tlodsb\n\t" + "testb %%al,%%al\n\t" + "je 2f\n\t" + "movl %4,%%edi\n\t" + "movl %%edx,%%ecx\n\t" + "repne\n\t" + "scasb\n\t" + "jne 1b\n" + "2:\tdecl %0" + :"=S" (__res):"a" (0),"c" (0xffffffff),"0" (cs),"g" (ct) + ); +return __res-cs; +} + +extern inline char * strpbrk(const char * cs,const char * ct) +{ +register char * __res __asm__("si"); +__asm__("cld\n\t" + "movl %4,%%edi\n\t" + "repne\n\t" + "scasb\n\t" + "notl %%ecx\n\t" + "decl %%ecx\n\t" + "movl %%ecx,%%edx\n" + "1:\tlodsb\n\t" + "testb %%al,%%al\n\t" + "je 2f\n\t" + "movl %4,%%edi\n\t" + "movl %%edx,%%ecx\n\t" + "repne\n\t" + "scasb\n\t" + "jne 1b\n\t" + "decl %0\n\t" + "jmp 3f\n" + "2:\txorl %0,%0\n" + "3:" + :"=S" (__res):"a" (0),"c" (0xffffffff),"0" (cs),"g" (ct) + ); +return __res; +} + +extern inline char * strstr(const char * cs,const char * ct) +{ +register char * __res __asm__("ax"); +__asm__("cld\n\t" \ + "movl %4,%%edi\n\t" + "repne\n\t" + "scasb\n\t" + "notl %%ecx\n\t" + "decl %%ecx\n\t" /* NOTE! This also sets Z if searchstring='' */ + "movl %%ecx,%%edx\n" + "1:\tmovl %4,%%edi\n\t" + "movl %%esi,%%eax\n\t" + "movl %%edx,%%ecx\n\t" + "repe\n\t" + "cmpsb\n\t" + "je 2f\n\t" /* also works for empty string, see above */ + "xchgl %%eax,%%esi\n\t" + "incl %%esi\n\t" + "cmpb $0,-1(%%eax)\n\t" + "jne 1b\n\t" + "xorl %%eax,%%eax\n\t" + "2:" + :"=a" (__res):"0" (0),"c" (0xffffffff),"S" (cs),"g" (ct) + ); +return __res; +} + +extern inline int strlen(const char * s) +{ +register int __res ; +__asm__("cld\n\t" + "repne\n\t" + "scasb\n\t" + "notl %0\n\t" + "decl %0" + :"=c" (__res):"D" (s),"a" (0),"0" (0xffffffff)); +return __res; +} + +extern char * ___strtok; + +extern inline char * strtok(char * s,const char * ct) +{ +register char * __res __asm__("si"); +__asm__("testl %1,%1\n\t" + "jne 1f\n\t" + "testl %0,%0\n\t" + "je 8f\n\t" + "movl %0,%1\n" + "1:\txorl %0,%0\n\t" + "movl $-1,%%ecx\n\t" + "xorl %%eax,%%eax\n\t" + "cld\n\t" + "movl %4,%%edi\n\t" + "repne\n\t" + "scasb\n\t" + "notl %%ecx\n\t" + "decl %%ecx\n\t" + "je 7f\n\t" /* empty delimeter-string */ + "movl %%ecx,%%edx\n" + "2:\tlodsb\n\t" + "testb %%al,%%al\n\t" + "je 7f\n\t" + "movl %4,%%edi\n\t" + "movl %%edx,%%ecx\n\t" + "repne\n\t" + "scasb\n\t" + "je 2b\n\t" + "decl %1\n\t" + "cmpb $0,(%1)\n\t" + "je 7f\n\t" + "movl %1,%0\n" + "3:\tlodsb\n\t" + "testb %%al,%%al\n\t" + "je 5f\n\t" + "movl %4,%%edi\n\t" + "movl %%edx,%%ecx\n\t" + "repne\n\t" + "scasb\n\t" + "jne 3b\n\t" + "decl %1\n\t" + "cmpb $0,(%1)\n\t" + "je 5f\n\t" + "movb $0,(%1)\n\t" + "incl %1\n\t" + "jmp 6f\n" + "5:\txorl %1,%1\n" + "6:\tcmpb $0,(%0)\n\t" + "jne 7f\n\t" + "xorl %0,%0\n" + "7:\ttestl %0,%0\n\t" + "jne 8f\n\t" + "movl %0,%1\n" + "8:" + :"=b" (__res),"=S" (___strtok) + :"0" (___strtok),"1" (s),"g" (ct) + ); +return __res; +} + +extern inline void * memcpy(void * dest,const void * src, int n) +{ +__asm__("cld\n\t" + "rep\n\t" + "movsb" + ::"c" (n),"S" (src),"D" (dest) + ); +return dest; +} + +extern inline void * memmove(void * dest,const void * src, int n) +{ +if (dest + +struct stat { + dev_t st_dev; + ino_t st_ino; + umode_t st_mode; + nlink_t st_nlink; + uid_t st_uid; + gid_t st_gid; + dev_t st_rdev; + off_t st_size; + time_t st_atime; + time_t st_mtime; + time_t st_ctime; +}; + +#define S_IFMT 00170000 +#define S_IFLNK 0120000 +#define S_IFREG 0100000 +#define S_IFBLK 0060000 +#define S_IFDIR 0040000 +#define S_IFCHR 0020000 +#define S_IFIFO 0010000 +#define S_ISUID 0004000 +#define S_ISGID 0002000 +#define S_ISVTX 0001000 + +#define S_ISLNK(m) (((m) & S_IFMT) == S_IFLNK) +#define S_ISREG(m) (((m) & S_IFMT) == S_IFREG) +#define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR) +#define S_ISCHR(m) (((m) & S_IFMT) == S_IFCHR) +#define S_ISBLK(m) (((m) & S_IFMT) == S_IFBLK) +#define S_ISFIFO(m) (((m) & S_IFMT) == S_IFIFO) + +#define S_IRWXU 00700 +#define S_IRUSR 00400 +#define S_IWUSR 00200 +#define S_IXUSR 00100 + +#define S_IRWXG 00070 +#define S_IRGRP 00040 +#define S_IWGRP 00020 +#define S_IXGRP 00010 + +#define S_IRWXO 00007 +#define S_IROTH 00004 +#define S_IWOTH 00002 +#define S_IXOTH 00001 + +extern int chmod(const char *_path, mode_t mode); +extern int fstat(int fildes, struct stat *stat_buf); +extern int mkdir(const char *_path, mode_t mode); +extern int mkfifo(const char *_path, mode_t mode); +extern int stat(const char *filename, struct stat *stat_buf); +extern mode_t umask(mode_t mask); + +#endif diff --git a/os/os/linux/include/sys/times.h b/os/os/linux/include/sys/times.h new file mode 100644 index 0000000..68d5bfb --- /dev/null +++ b/os/os/linux/include/sys/times.h @@ -0,0 +1,15 @@ +#ifndef _TIMES_H +#define _TIMES_H + +#include + +struct tms { + time_t tms_utime; + time_t tms_stime; + time_t tms_cutime; + time_t tms_cstime; +}; + +extern time_t times(struct tms * tp); + +#endif diff --git a/os/os/linux/include/sys/types.h b/os/os/linux/include/sys/types.h new file mode 100644 index 0000000..557aa31 --- /dev/null +++ b/os/os/linux/include/sys/types.h @@ -0,0 +1,46 @@ +#ifndef _SYS_TYPES_H +#define _SYS_TYPES_H + +#ifndef _SIZE_T +#define _SIZE_T +typedef unsigned int size_t; +#endif + +#ifndef _TIME_T +#define _TIME_T +typedef long time_t; +#endif + +#ifndef _PTRDIFF_T +#define _PTRDIFF_T +typedef long ptrdiff_t; +#endif + +#ifndef NULL +#define NULL ((void *) 0) +#endif + +typedef int pid_t; +typedef unsigned short uid_t; +typedef unsigned char gid_t; +typedef unsigned short dev_t; +typedef unsigned short ino_t; +typedef unsigned short mode_t; +typedef unsigned short umode_t; +typedef unsigned char nlink_t; +typedef int daddr_t; +typedef long off_t; +typedef unsigned char u_char; +typedef unsigned short ushort; + +typedef struct { int quot,rem; } div_t; +typedef struct { long quot,rem; } ldiv_t; + +struct ustat { + daddr_t f_tfree; + ino_t f_tinode; + char f_fname[6]; + char f_fpack[6]; +}; + +#endif diff --git a/os/os/linux/include/sys/utsname.h b/os/os/linux/include/sys/utsname.h new file mode 100644 index 0000000..0a1c5a0 --- /dev/null +++ b/os/os/linux/include/sys/utsname.h @@ -0,0 +1,16 @@ +#ifndef _SYS_UTSNAME_H +#define _SYS_UTSNAME_H + +#include + +struct utsname { + char sysname[9]; + char nodename[9]; + char release[9]; + char version[9]; + char machine[9]; +}; + +extern int uname(struct utsname * utsbuf); + +#endif diff --git a/os/os/linux/include/sys/wait.h b/os/os/linux/include/sys/wait.h new file mode 100644 index 0000000..53190c2 --- /dev/null +++ b/os/os/linux/include/sys/wait.h @@ -0,0 +1,23 @@ +#ifndef _SYS_WAIT_H +#define _SYS_WAIT_H + +#include + +#define _LOW(v) ( (v) & 0377) +#define _HIGH(v) ( ((v) >> 8) & 0377) + +/* options for waitpid, WUNTRACED not supported */ +#define WNOHANG 1 +#define WUNTRACED 2 + +#define WIFEXITED(s) (!((s)&0xFF) +#define WIFSTOPPED(s) (((s)&0xFF)==0x7F) +#define WEXITSTATUS(s) (((s)>>8)&0xFF) +#define WTERMSIG(s) ((s)&0x7F) +#define WSTOPSIG(s) (((s)>>8)&0xFF) +#define WIFSIGNALED(s) (((unsigned int)(s)-1 & 0xFFFF) < 0xFF) + +pid_t wait(int *stat_loc); +pid_t waitpid(pid_t pid, int *stat_loc, int options); + +#endif diff --git a/os/os/linux/include/termios.h b/os/os/linux/include/termios.h new file mode 100644 index 0000000..2b7b913 --- /dev/null +++ b/os/os/linux/include/termios.h @@ -0,0 +1,228 @@ +#ifndef _TERMIOS_H +#define _TERMIOS_H + +#define TTY_BUF_SIZE 1024 + +/* 0x54 is just a magic number to make these relatively uniqe ('T') */ + +#define TCGETS 0x5401 +#define TCSETS 0x5402 +#define TCSETSW 0x5403 +#define TCSETSF 0x5404 +#define TCGETA 0x5405 +#define TCSETA 0x5406 +#define TCSETAW 0x5407 +#define TCSETAF 0x5408 +#define TCSBRK 0x5409 +#define TCXONC 0x540A +#define TCFLSH 0x540B +#define TIOCEXCL 0x540C +#define TIOCNXCL 0x540D +#define TIOCSCTTY 0x540E +#define TIOCGPGRP 0x540F +#define TIOCSPGRP 0x5410 +#define TIOCOUTQ 0x5411 +#define TIOCSTI 0x5412 +#define TIOCGWINSZ 0x5413 +#define TIOCSWINSZ 0x5414 +#define TIOCMGET 0x5415 +#define TIOCMBIS 0x5416 +#define TIOCMBIC 0x5417 +#define TIOCMSET 0x5418 +#define TIOCGSOFTCAR 0x5419 +#define TIOCSSOFTCAR 0x541A +#define TIOCINQ 0x541B + +struct winsize { + unsigned short ws_row; + unsigned short ws_col; + unsigned short ws_xpixel; + unsigned short ws_ypixel; +}; + +#define NCC 8 +struct termio { + unsigned short c_iflag; /* input mode flags */ + unsigned short c_oflag; /* output mode flags */ + unsigned short c_cflag; /* control mode flags */ + unsigned short c_lflag; /* local mode flags */ + unsigned char c_line; /* line discipline */ + unsigned char c_cc[NCC]; /* control characters */ +}; + +#define NCCS 17 +struct termios { + unsigned long c_iflag; /* input mode flags */ + unsigned long c_oflag; /* output mode flags */ + unsigned long c_cflag; /* control mode flags */ + unsigned long c_lflag; /* local mode flags */ + unsigned char c_line; /* line discipline */ + unsigned char c_cc[NCCS]; /* control characters */ +}; + +/* c_cc characters */ +#define VINTR 0 +#define VQUIT 1 +#define VERASE 2 +#define VKILL 3 +#define VEOF 4 +#define VTIME 5 +#define VMIN 6 +#define VSWTC 7 +#define VSTART 8 +#define VSTOP 9 +#define VSUSP 10 +#define VEOL 11 +#define VREPRINT 12 +#define VDISCARD 13 +#define VWERASE 14 +#define VLNEXT 15 +#define VEOL2 16 + +/* c_iflag bits */ +#define IGNBRK 0000001 +#define BRKINT 0000002 +#define IGNPAR 0000004 +#define PARMRK 0000010 +#define INPCK 0000020 +#define ISTRIP 0000040 +#define INLCR 0000100 +#define IGNCR 0000200 +#define ICRNL 0000400 +#define IUCLC 0001000 +#define IXON 0002000 +#define IXANY 0004000 +#define IXOFF 0010000 +#define IMAXBEL 0020000 + +/* c_oflag bits */ +#define OPOST 0000001 +#define OLCUC 0000002 +#define ONLCR 0000004 +#define OCRNL 0000010 +#define ONOCR 0000020 +#define ONLRET 0000040 +#define OFILL 0000100 +#define OFDEL 0000200 +#define NLDLY 0000400 +#define NL0 0000000 +#define NL1 0000400 +#define CRDLY 0003000 +#define CR0 0000000 +#define CR1 0001000 +#define CR2 0002000 +#define CR3 0003000 +#define TABDLY 0014000 +#define TAB0 0000000 +#define TAB1 0004000 +#define TAB2 0010000 +#define TAB3 0014000 +#define XTABS 0014000 +#define BSDLY 0020000 +#define BS0 0000000 +#define BS1 0020000 +#define VTDLY 0040000 +#define VT0 0000000 +#define VT1 0040000 +#define FFDLY 0040000 +#define FF0 0000000 +#define FF1 0040000 + +/* c_cflag bit meaning */ +#define CBAUD 0000017 +#define B0 0000000 /* hang up */ +#define B50 0000001 +#define B75 0000002 +#define B110 0000003 +#define B134 0000004 +#define B150 0000005 +#define B200 0000006 +#define B300 0000007 +#define B600 0000010 +#define B1200 0000011 +#define B1800 0000012 +#define B2400 0000013 +#define B4800 0000014 +#define B9600 0000015 +#define B19200 0000016 +#define B38400 0000017 +#define EXTA B19200 +#define EXTB B38400 +#define CSIZE 0000060 +#define CS5 0000000 +#define CS6 0000020 +#define CS7 0000040 +#define CS8 0000060 +#define CSTOPB 0000100 +#define CREAD 0000200 +#define CPARENB 0000400 +#define CPARODD 0001000 +#define HUPCL 0002000 +#define CLOCAL 0004000 +#define CIBAUD 03600000 /* input baud rate (not used) */ +#define CRTSCTS 020000000000 /* flow control */ + +#define PARENB CPARENB +#define PARODD CPARODD + +/* c_lflag bits */ +#define ISIG 0000001 +#define ICANON 0000002 +#define XCASE 0000004 +#define ECHO 0000010 +#define ECHOE 0000020 +#define ECHOK 0000040 +#define ECHONL 0000100 +#define NOFLSH 0000200 +#define TOSTOP 0000400 +#define ECHOCTL 0001000 +#define ECHOPRT 0002000 +#define ECHOKE 0004000 +#define FLUSHO 0010000 +#define PENDIN 0040000 +#define IEXTEN 0100000 + +/* modem lines */ +#define TIOCM_LE 0x001 +#define TIOCM_DTR 0x002 +#define TIOCM_RTS 0x004 +#define TIOCM_ST 0x008 +#define TIOCM_SR 0x010 +#define TIOCM_CTS 0x020 +#define TIOCM_CAR 0x040 +#define TIOCM_RNG 0x080 +#define TIOCM_DSR 0x100 +#define TIOCM_CD TIOCM_CAR +#define TIOCM_RI TIOCM_RNG + +/* tcflow() and TCXONC use these */ +#define TCOOFF 0 +#define TCOON 1 +#define TCIOFF 2 +#define TCION 3 + +/* tcflush() and TCFLSH use these */ +#define TCIFLUSH 0 +#define TCOFLUSH 1 +#define TCIOFLUSH 2 + +/* tcsetattr uses these */ +#define TCSANOW 0 +#define TCSADRAIN 1 +#define TCSAFLUSH 2 + +typedef int speed_t; + +extern speed_t cfgetispeed(struct termios *termios_p); +extern speed_t cfgetospeed(struct termios *termios_p); +extern int cfsetispeed(struct termios *termios_p, speed_t speed); +extern int cfsetospeed(struct termios *termios_p, speed_t speed); +extern int tcdrain(int fildes); +extern int tcflow(int fildes, int action); +extern int tcflush(int fildes, int queue_selector); +extern int tcgetattr(int fildes, struct termios *termios_p); +extern int tcsendbreak(int fildes, int duration); +extern int tcsetattr(int fildes, int optional_actions, + struct termios *termios_p); + +#endif diff --git a/os/os/linux/include/time.h b/os/os/linux/include/time.h new file mode 100644 index 0000000..d0a765d --- /dev/null +++ b/os/os/linux/include/time.h @@ -0,0 +1,42 @@ +#ifndef _TIME_H +#define _TIME_H + +#ifndef _TIME_T +#define _TIME_T +typedef long time_t; +#endif + +#ifndef _SIZE_T +#define _SIZE_T +typedef unsigned int size_t; +#endif + +#define CLOCKS_PER_SEC 100 + +typedef long clock_t; + +struct tm { + int tm_sec; + int tm_min; + int tm_hour; + int tm_mday; + int tm_mon; + int tm_year; + int tm_wday; + int tm_yday; + int tm_isdst; +}; + +clock_t clock(void); +time_t time(time_t * tp); +double difftime(time_t time2, time_t time1); +time_t mktime(struct tm * tp); + +char * asctime(const struct tm * tp); +char * ctime(const time_t * tp); +struct tm * gmtime(const time_t *tp); +struct tm *localtime(const time_t * tp); +size_t strftime(char * s, size_t smax, const char * fmt, const struct tm * tp); +void tzset(void); + +#endif diff --git a/os/os/linux/include/unistd.h b/os/os/linux/include/unistd.h new file mode 100644 index 0000000..d0ab29f --- /dev/null +++ b/os/os/linux/include/unistd.h @@ -0,0 +1,276 @@ +#ifndef _UNISTD_H +#define _UNISTD_H + +/* ok, this may be a joke, but I'm working on it */ +#define _POSIX_VERSION 198808L + +#define _POSIX_CHOWN_RESTRICTED /* only root can do a chown (I think..) */ +#define _POSIX_NO_TRUNC /* no pathname truncation (but see in kernel) */ +#define _POSIX_VDISABLE '\0' /* character to disable things like ^C */ +/*#define _POSIX_SAVED_IDS */ /* we'll get to this yet */ +/*#define _POSIX_JOB_CONTROL */ /* we aren't there quite yet. Soon hopefully */ + +#define STDIN_FILENO 0 +#define STDOUT_FILENO 1 +#define STDERR_FILENO 2 + +#ifndef NULL +#define NULL ((void *)0) +#endif + +/* access */ +#define F_OK 0 +#define X_OK 1 +#define W_OK 2 +#define R_OK 4 + +/* lseek */ +#define SEEK_SET 0 +#define SEEK_CUR 1 +#define SEEK_END 2 + +/* _SC stands for System Configuration. We don't use them much */ +#define _SC_ARG_MAX 1 +#define _SC_CHILD_MAX 2 +#define _SC_CLOCKS_PER_SEC 3 +#define _SC_NGROUPS_MAX 4 +#define _SC_OPEN_MAX 5 +#define _SC_JOB_CONTROL 6 +#define _SC_SAVED_IDS 7 +#define _SC_VERSION 8 + +/* more (possibly) configurable things - now pathnames */ +#define _PC_LINK_MAX 1 +#define _PC_MAX_CANON 2 +#define _PC_MAX_INPUT 3 +#define _PC_NAME_MAX 4 +#define _PC_PATH_MAX 5 +#define _PC_PIPE_BUF 6 +#define _PC_NO_TRUNC 7 +#define _PC_VDISABLE 8 +#define _PC_CHOWN_RESTRICTED 9 + +#include +#include +#include +#include + +#ifdef __LIBRARY__ + +#define __NR_setup 0 /* used only by init, to get system going */ +#define __NR_exit 1 +#define __NR_fork 2 +#define __NR_read 3 +#define __NR_write 4 +#define __NR_open 5 +#define __NR_close 6 +#define __NR_waitpid 7 +#define __NR_creat 8 +#define __NR_link 9 +#define __NR_unlink 10 +#define __NR_execve 11 +#define __NR_chdir 12 +#define __NR_time 13 +#define __NR_mknod 14 +#define __NR_chmod 15 +#define __NR_chown 16 +#define __NR_break 17 +#define __NR_stat 18 +#define __NR_lseek 19 +#define __NR_getpid 20 +#define __NR_mount 21 +#define __NR_umount 22 +#define __NR_setuid 23 +#define __NR_getuid 24 +#define __NR_stime 25 +#define __NR_ptrace 26 +#define __NR_alarm 27 +#define __NR_fstat 28 +#define __NR_pause 29 +#define __NR_utime 30 +#define __NR_stty 31 +#define __NR_gtty 32 +#define __NR_access 33 +#define __NR_nice 34 +#define __NR_ftime 35 +#define __NR_sync 36 +#define __NR_kill 37 +#define __NR_rename 38 +#define __NR_mkdir 39 +#define __NR_rmdir 40 +#define __NR_dup 41 +#define __NR_pipe 42 +#define __NR_times 43 +#define __NR_prof 44 +#define __NR_brk 45 +#define __NR_setgid 46 +#define __NR_getgid 47 +#define __NR_signal 48 +#define __NR_geteuid 49 +#define __NR_getegid 50 +#define __NR_acct 51 +#define __NR_phys 52 +#define __NR_lock 53 +#define __NR_ioctl 54 +#define __NR_fcntl 55 +#define __NR_mpx 56 +#define __NR_setpgid 57 +#define __NR_ulimit 58 +#define __NR_uname 59 +#define __NR_umask 60 +#define __NR_chroot 61 +#define __NR_ustat 62 +#define __NR_dup2 63 +#define __NR_getppid 64 +#define __NR_getpgrp 65 +#define __NR_setsid 66 +#define __NR_sigaction 67 +#define __NR_sgetmask 68 +#define __NR_ssetmask 69 +#define __NR_setreuid 70 +#define __NR_setregid 71 +#define __NR_sigsuspend 72 +#define __NR_sigpending 73 +#define __NR_sethostname 74 +#define __NR_setrlimit 75 +#define __NR_getrlimit 76 +#define __NR_getrusage 77 +#define __NR_gettimeofday 78 +#define __NR_settimeofday 79 +#define __NR_getgroups 80 +#define __NR_setgroups 81 +#define __NR_select 82 +#define __NR_symlink 83 +#define __NR_lstat 84 +#define __NR_readlink 85 +#define __NR_uselib 86 +#define __NR_execve2 87 +#define __NR_getdents 88 +#define __NR_pipe2 89 +#define __NR_sleep 90 +#define __NR_getcwd 91 +#define _syscall0(type,name) \ +type name(void) \ +{ \ +long __res; \ +__asm__ volatile ("int $0x80" \ + : "=a" (__res) \ + : "0" (__NR_##name)); \ +if (__res >= 0) \ + return (type) __res; \ +errno = -__res; \ +return -1; \ +} + +#define _syscall1(type,name,atype,a) \ +type name(atype a) \ +{ \ +long __res; \ +__asm__ volatile ("int $0x80" \ + : "=a" (__res) \ + : "0" (__NR_##name),"b" ((long)(a))); \ +if (__res >= 0) \ + return (type) __res; \ +errno = -__res; \ +return -1; \ +} + +#define _syscall2(type,name,atype,a,btype,b) \ +type name(atype a,btype b) \ +{ \ +long __res; \ +__asm__ volatile ("int $0x80" \ + : "=a" (__res) \ + : "0" (__NR_##name),"b" ((long)(a)),"c" ((long)(b))); \ +if (__res >= 0) \ + return (type) __res; \ +errno = -__res; \ +return -1; \ +} + +#define _syscall3(type,name,atype,a,btype,b,ctype,c) \ +type name(atype a,btype b,ctype c) \ +{ \ +long __res; \ +__asm__ volatile ("int $0x80" \ + : "=a" (__res) \ + : "0" (__NR_##name),"b" ((long)(a)),"c" ((long)(b)),"d" ((long)(c))); \ +if (__res>=0) \ + return (type) __res; \ +errno=-__res; \ +return -1; \ +} + +#endif /* __LIBRARY__ */ + +extern int errno; + +int access(const char * filename, mode_t mode); +int acct(const char * filename); +int alarm(int sec); +int brk(void * end_data_segment); +void * sbrk(ptrdiff_t increment); +int chdir(const char * filename); +int chmod(const char * filename, mode_t mode); +int chown(const char * filename, uid_t owner, gid_t group); +int chroot(const char * filename); +int close(int fildes); +int creat(const char * filename, mode_t mode); +int dup(int fildes); +int execve(const char * filename, char ** argv, char ** envp); +int execv(const char * pathname, char ** argv); +int execvp(const char * file, char ** argv); +int execl(const char * pathname, char * arg0, ...); +int execlp(const char * file, char * arg0, ...); +int execle(const char * pathname, char * arg0, ...); +volatile void exit(int status); +volatile void _exit(int status); +int fcntl(int fildes, int cmd, ...); +int fork(void); +int getpid(void); +int getuid(void); +int geteuid(void); +int getgid(void); +int getegid(void); +int ioctl(int fildes, int cmd, ...); +int kill(pid_t pid, int signal); +int link(const char * filename1, const char * filename2); +int lseek(int fildes, off_t offset, int origin); +int mknod(const char * filename, mode_t mode, dev_t dev); +int mount(const char * specialfile, const char * dir, int rwflag); +int nice(int val); +int open(const char * filename, int flag, ...); +int pause(void); +int pipe(int * fildes); +int read(int fildes, char * buf, off_t count); +int setpgrp(void); +int setpgid(pid_t pid,pid_t pgid); +int setuid(uid_t uid); +int setgid(gid_t gid); +void (*signal(int sig, void (*fn)(int)))(int); +int stat(const char * filename, struct stat * stat_buf); +int fstat(int fildes, struct stat * stat_buf); +int stime(time_t * tptr); +int sync(void); +time_t time(time_t * tloc); +time_t times(struct tms * tbuf); +int ulimit(int cmd, long limit); +mode_t umask(mode_t mask); +int umount(const char * specialfile); +int uname(struct utsname * name); +int unlink(const char * filename); +int ustat(dev_t dev, struct ustat * ubuf); +int utime(const char * filename, struct utimbuf * times); +pid_t waitpid(pid_t pid,int * wait_stat,int options); +pid_t wait(int * wait_stat); +int write(int fildes, const char * buf, off_t count); +int dup2(int oldfd, int newfd); +int getppid(void); +pid_t getpgrp(void); +pid_t setsid(void); +int sys_getdents(unsigned int fd, struct linux_dirent *d, unsigned int count); +int sys_pipe2(unsigned long * fildes,int flag); +int sys_sleep(unsigned int seconds); +#define __always_inline inline __attribute__((always_inline)) + +#endif diff --git a/os/os/linux/include/utime.h b/os/os/linux/include/utime.h new file mode 100644 index 0000000..83f07c7 --- /dev/null +++ b/os/os/linux/include/utime.h @@ -0,0 +1,13 @@ +#ifndef _UTIME_H +#define _UTIME_H + +#include /* I know - shouldn't do this, but .. */ + +struct utimbuf { + time_t actime; + time_t modtime; +}; + +extern int utime(const char *filename, struct utimbuf *times); + +#endif diff --git a/os/os/linux/init/main.c b/os/os/linux/init/main.c new file mode 100644 index 0000000..bd86a68 --- /dev/null +++ b/os/os/linux/init/main.c @@ -0,0 +1,216 @@ +/* + * linux/init/main.c + * + * (C) 1991 Linus Torvalds + */ + +#define __LIBRARY__ +#include +#include + +/* + * we need this inline - forking from kernel space will result + * in NO COPY ON WRITE (!!!), until an execve is executed. This + * is no problem, but for the stack. This is handled by not letting + * main() use the stack at all after fork(). Thus, no function + * calls - which means inline code for fork too, as otherwise we + * would use the stack upon exit from 'fork()'. + * + * Actually only pause and fork are needed inline, so that there + * won't be any messing with the stack from main(), but we define + * some others too. + */ + +__always_inline _syscall0(int,fork) +__always_inline _syscall0(int,pause) +__always_inline _syscall1(int,setup,void *,BIOS) +__always_inline _syscall0(int,sync) + +#include +#include +#include +#include +#include + +#include +#include +#include +#include + +#include + +static char printbuf[1024]; + +extern int vsprintf(); +extern void init(void); +extern void blk_dev_init(void); +extern void chr_dev_init(void); +extern void hd_init(void); +extern void floppy_init(void); +extern void mem_init(long start, long end); +extern long rd_init(long mem_start, int length); +extern long kernel_mktime(struct tm * tm); +extern long startup_time; + +/* + * This is set up by the setup-routine at boot-time + */ +#define EXT_MEM_K (*(unsigned short *)0x90002) +#define DRIVE_INFO (*(struct drive_info *)0x90080) +#define ORIG_ROOT_DEV (*(unsigned short *)0x901FC) + +/* + * Yeah, yeah, it's ugly, but I cannot find how to do this correctly + * and this seems to work. I anybody has more info on the real-time + * clock I'd be interested. Most of this was trial and error, and some + * bios-listing reading. Urghh. + */ + +#define CMOS_READ(addr) ({ \ +outb_p(0x80|addr,0x70); \ +inb_p(0x71); \ +}) + +#define BCD_TO_BIN(val) ((val)=((val)&15) + ((val)>>4)*10) + +static void time_init(void) +{ + struct tm time; + + do { + time.tm_sec = CMOS_READ(0); + time.tm_min = CMOS_READ(2); + time.tm_hour = CMOS_READ(4); + time.tm_mday = CMOS_READ(7); + time.tm_mon = CMOS_READ(8); + time.tm_year = CMOS_READ(9); + } while (time.tm_sec != CMOS_READ(0)); + BCD_TO_BIN(time.tm_sec); + BCD_TO_BIN(time.tm_min); + BCD_TO_BIN(time.tm_hour); + BCD_TO_BIN(time.tm_mday); + BCD_TO_BIN(time.tm_mon); + BCD_TO_BIN(time.tm_year); + time.tm_mon--; + startup_time = kernel_mktime(&time); +} + +static long memory_end = 0; +static long buffer_memory_end = 0; +static long main_memory_start = 0; + +struct drive_info { char dummy[32]; } drive_info; + +void main(void) /* This really IS void, no error here. */ +{ /* The startup routine assumes (well, ...) this */ +/* + * Interrupts are still disabled. Do necessary setups, then + * enable them + */ + ROOT_DEV = ORIG_ROOT_DEV; + __asm__ volatile ("cld"); /* by wyj */ + drive_info = DRIVE_INFO; + memory_end = (1<<20) + (EXT_MEM_K<<10); + memory_end &= 0xfffff000; + if (memory_end > 16*1024*1024) + memory_end = 16*1024*1024; + if (memory_end > 12*1024*1024) + buffer_memory_end = 4*1024*1024; + else if (memory_end > 6*1024*1024) + buffer_memory_end = 2*1024*1024; + else + buffer_memory_end = 1*1024*1024; + main_memory_start = buffer_memory_end; +#ifdef RAMDISK + main_memory_start += rd_init(main_memory_start, RAMDISK*1024); +#endif + mem_init(main_memory_start,memory_end); + trap_init(); + blk_dev_init(); + chr_dev_init(); + tty_init(); + time_init(); + sched_init(); + buffer_init(buffer_memory_end); + hd_init(); + floppy_init(); + sti(); + move_to_user_mode(); + if (!fork()) { /* we count on this going ok */ + init(); + } +/* + * NOTE!! For any other task 'pause()' would mean we have to get a + * signal to awaken, but task0 is the sole exception (see 'schedule()') + * as task 0 gets activated at every idle moment (when no other tasks + * can run). For task0 'pause()' just means we go check if some other + * task can run, and if not we return here. + */ + for(;;) pause(); +} + +static int printf(const char *fmt, ...) +{ + va_list args; + int i; + + va_start(args, fmt); + write(1,printbuf,i=vsprintf(printbuf, fmt, args)); + va_end(args); + return i; +} + +static char * argv_rc[] = { "/bin/sh", NULL }; +static char * envp_rc[] = { "HOME=/", NULL, NULL }; + +static char * argv[] = { "-/bin/sh",NULL }; +static char * envp[] = { "HOME=/usr/root", NULL, NULL }; + +void init(void) +{ + int pid,i; + + setup((void *) &drive_info); + (void) open("/dev/tty0",O_RDWR,0); + (void) dup(0); + (void) dup(0); + printf("%d buffers = %d bytes buffer space\n\r",NR_BUFFERS, + NR_BUFFERS*BLOCK_SIZE); + printf("Free mem: %d bytes\n\r",memory_end-main_memory_start); + if (!(pid=fork())) { + close(0); + if (open("/etc/rc",O_RDONLY,0)) + _exit(1); + execve("/bin/sh",argv_rc,envp_rc); + _exit(2); + } + if (pid>0) + while (pid != wait(&i)) + /* nothing */; + while (1) { + if ((pid=fork())<0) { + printf("Fork failed in init\r\n"); + continue; + } + if (!pid) { + close(0);close(1);close(2); + setsid(); + (void) open("/dev/tty0",O_RDWR,0); + (void) dup(0); + (void) dup(0); + _exit(execve("/bin/sh",argv,envp)); + } + while (1) + if (pid == wait(&i)) + break; + printf("\n\rchild %d died with code %04x\n\r",pid,i); + sync(); + } + _exit(0); /* NOTE! _exit, not exit() */ +} + +void print_nr(int sid) +{ + if (sid > 86) + printk(" --syscall: sid=%d, pid=%d\n", sid, current->pid); +} diff --git a/os/os/linux/init/main.o b/os/os/linux/init/main.o new file mode 100644 index 0000000..03263d3 Binary files /dev/null and b/os/os/linux/init/main.o differ diff --git a/os/os/linux/kernel/Makefile b/os/os/linux/kernel/Makefile new file mode 100644 index 0000000..70a5865 --- /dev/null +++ b/os/os/linux/kernel/Makefile @@ -0,0 +1,83 @@ +# +# Makefile for the FREAX-kernel. +# +# Note! Dependencies are done automagically by 'make dep', which also +# removes any old dependencies. DON'T put your own dependencies here +# unless it's something special (ie not a .c file). +# + +AR =ar +AS =as +LD =ld +LDFLAGS =-m elf_i386 -Ttext 0 -e startup_32 +CC =gcc -march=i386 +CFLAGS =-w -g -fomit-frame-pointer -finline-functions \ + -nostdinc -fno-stack-protector -mcld -I../include +CPP =gcc -E -nostdinc -I../include + +.c.s: + $(CC) $(CFLAGS) \ + -S -o $*.s $< +.s.o: + $(AS) -o $*.o $< +.c.o: + $(CC) $(CFLAGS) \ + -c -o $*.o $< + +OBJS = sched.o system_call.o traps.o asm.o fork.o \ + panic.o pipe2.o printk.o vsprintf.o sys.o execve2.o exit.o \ + signal.o mktime.o getdents.o + +kernel.o: $(OBJS) + $(LD) -r -o kernel.o $(OBJS) + sync + +clean: + rm -f core *.o *.a tmp_make keyboard.s + for i in *.c;do rm -f `basename $$i .c`.s;done + (cd chr_drv; make clean) + (cd blk_drv; make clean) + (cd math; make clean) + +dep: + sed '/\#\#\# Dependencies/q' < Makefile > tmp_make + (for i in *.c;do echo -n `echo $$i | sed 's,\.c,\.s,'`" "; \ + $(CPP) -M $$i;done) >> tmp_make + cp tmp_make Makefile + (cd chr_drv; make dep) + (cd blk_drv; make dep) + +### Dependencies: +exit.s exit.o : exit.c ../include/errno.h ../include/signal.h \ + ../include/sys/types.h ../include/sys/wait.h ../include/linux/sched.h \ + ../include/linux/head.h ../include/linux/fs.h ../include/linux/mm.h \ + ../include/linux/kernel.h ../include/linux/tty.h ../include/termios.h \ + ../include/asm/segment.h +fork.s fork.o : fork.c ../include/errno.h ../include/linux/sched.h \ + ../include/linux/head.h ../include/linux/fs.h ../include/sys/types.h \ + ../include/linux/mm.h ../include/signal.h ../include/linux/kernel.h \ + ../include/asm/segment.h ../include/asm/system.h +mktime.s mktime.o : mktime.c ../include/time.h +panic.s panic.o : panic.c ../include/linux/kernel.h ../include/linux/sched.h \ + ../include/linux/head.h ../include/linux/fs.h ../include/sys/types.h \ + ../include/linux/mm.h ../include/signal.h +printk.s printk.o : printk.c ../include/stdarg.h ../include/stddef.h \ + ../include/linux/kernel.h +sched.s sched.o : sched.c ../include/linux/sched.h ../include/linux/head.h \ + ../include/linux/fs.h ../include/sys/types.h ../include/linux/mm.h \ + ../include/signal.h ../include/linux/kernel.h ../include/linux/sys.h \ + ../include/linux/fdreg.h ../include/asm/system.h ../include/asm/io.h \ + ../include/asm/segment.h +signal.s signal.o : signal.c ../include/linux/sched.h ../include/linux/head.h \ + ../include/linux/fs.h ../include/sys/types.h ../include/linux/mm.h \ + ../include/signal.h ../include/linux/kernel.h ../include/asm/segment.h +sys.s sys.o : sys.c ../include/errno.h ../include/linux/sched.h \ + ../include/linux/head.h ../include/linux/fs.h ../include/sys/types.h \ + ../include/linux/mm.h ../include/signal.h ../include/linux/tty.h \ + ../include/termios.h ../include/linux/kernel.h ../include/asm/segment.h \ + ../include/sys/times.h ../include/sys/utsname.h +traps.s traps.o : traps.c ../include/string.h ../include/linux/head.h \ + ../include/linux/sched.h ../include/linux/fs.h ../include/sys/types.h \ + ../include/linux/mm.h ../include/signal.h ../include/linux/kernel.h \ + ../include/asm/system.h ../include/asm/segment.h ../include/asm/io.h +vsprintf.s vsprintf.o : vsprintf.c ../include/stdarg.h ../include/string.h diff --git a/os/os/linux/kernel/asm.o b/os/os/linux/kernel/asm.o new file mode 100644 index 0000000..a89ec75 Binary files /dev/null and b/os/os/linux/kernel/asm.o differ diff --git a/os/os/linux/kernel/asm.s b/os/os/linux/kernel/asm.s new file mode 100644 index 0000000..1022817 --- /dev/null +++ b/os/os/linux/kernel/asm.s @@ -0,0 +1,146 @@ +/* + * linux/kernel/asm.s + * + * (C) 1991 Linus Torvalds + */ + +/* + * asm.s contains the low-level code for most hardware faults. + * page_exception is handled by the mm, so that isn't here. This + * file also handles (hopefully) fpu-exceptions due to TS-bit, as + * the fpu must be properly saved/resored. This hasn't been tested. + */ + +.globl divide_error,debug,nmi,int3,overflow,bounds,invalid_op +.globl double_fault,coprocessor_segment_overrun +.globl invalid_TSS,segment_not_present,stack_segment +.globl general_protection,coprocessor_error,irq13,reserved + +divide_error: + pushl $do_divide_error +no_error_code: + xchgl %eax,(%esp) + pushl %ebx + pushl %ecx + pushl %edx + pushl %edi + pushl %esi + pushl %ebp + push %ds + push %es + push %fs + pushl $0 # "error code" + lea 44(%esp),%edx + pushl %edx + movl $0x10,%edx + mov %dx,%ds + mov %dx,%es + mov %dx,%fs + call *%eax + addl $8,%esp + pop %fs + pop %es + pop %ds + popl %ebp + popl %esi + popl %edi + popl %edx + popl %ecx + popl %ebx + popl %eax + iret + +debug: + pushl $do_int3 # _do_debug + jmp no_error_code + +nmi: + pushl $do_nmi + jmp no_error_code + +int3: + pushl $do_int3 + jmp no_error_code + +overflow: + pushl $do_overflow + jmp no_error_code + +bounds: + pushl $do_bounds + jmp no_error_code + +invalid_op: + pushl $do_invalid_op + jmp no_error_code + +coprocessor_segment_overrun: + pushl $do_coprocessor_segment_overrun + jmp no_error_code + +reserved: + pushl $do_reserved + jmp no_error_code + +irq13: + pushl %eax + xorb %al,%al + outb %al,$0xF0 + movb $0x20,%al + outb %al,$0x20 + jmp 1f +1: jmp 1f +1: outb %al,$0xA0 + popl %eax + jmp coprocessor_error + +double_fault: + pushl $do_double_fault +error_code: + xchgl %eax,4(%esp) # error code <-> %eax + xchgl %ebx,(%esp) # &function <-> %ebx + pushl %ecx + pushl %edx + pushl %edi + pushl %esi + pushl %ebp + push %ds + push %es + push %fs + pushl %eax # error code + lea 44(%esp),%eax # offset + pushl %eax + movl $0x10,%eax + mov %ax,%ds + mov %ax,%es + mov %ax,%fs + call *%ebx + addl $8,%esp + pop %fs + pop %es + pop %ds + popl %ebp + popl %esi + popl %edi + popl %edx + popl %ecx + popl %ebx + popl %eax + iret + +invalid_TSS: + pushl $do_invalid_TSS + jmp error_code + +segment_not_present: + pushl $do_segment_not_present + jmp error_code + +stack_segment: + pushl $do_stack_segment + jmp error_code + +general_protection: + pushl $do_general_protection + jmp error_code + diff --git a/os/os/linux/kernel/blk_drv/Makefile b/os/os/linux/kernel/blk_drv/Makefile new file mode 100644 index 0000000..1fb57f9 --- /dev/null +++ b/os/os/linux/kernel/blk_drv/Makefile @@ -0,0 +1,58 @@ +# +# Makefile for the FREAX-kernel block device drivers. +# +# Note! Dependencies are done automagically by 'make dep', which also +# removes any old dependencies. DON'T put your own dependencies here +# unless it's something special (ie not a .c file). +# + +AR =ar +AS =as +LD =ld +LDFLAGS =-s -x +CC =gcc -march=i386 +CFLAGS =-w -g -fstrength-reduce -fomit-frame-pointer -mcld \ + -finline-functions -nostdinc -fno-stack-protector -I../../include +CPP =gcc -E -nostdinc -I../../include + +.c.s: + $(CC) $(CFLAGS) \ + -S -o $*.s $< +.s.o: + $(AS) -o $*.o $< +.c.o: + $(CC) $(CFLAGS) \ + -c -o $*.o $< + +OBJS = ll_rw_blk.o floppy.o hd.o ramdisk.o + +blk_drv.a: $(OBJS) + $(AR) rcs blk_drv.a $(OBJS) + sync + +clean: + rm -f core *.o *.a tmp_make + for i in *.c;do rm -f `basename $$i .c`.s;done + +dep: + sed '/\#\#\# Dependencies/q' < Makefile > tmp_make + (for i in *.c;do echo -n `echo $$i | sed 's,\.c,\.s,'`" "; \ + $(CPP) -M $$i;done) >> tmp_make + cp tmp_make Makefile + +### Dependencies: +floppy.s floppy.o : floppy.c ../../include/linux/sched.h ../../include/linux/head.h \ + ../../include/linux/fs.h ../../include/sys/types.h ../../include/linux/mm.h \ + ../../include/signal.h ../../include/linux/kernel.h \ + ../../include/linux/fdreg.h ../../include/asm/system.h \ + ../../include/asm/io.h ../../include/asm/segment.h blk.h +hd.s hd.o : hd.c ../../include/linux/config.h ../../include/linux/sched.h \ + ../../include/linux/head.h ../../include/linux/fs.h \ + ../../include/sys/types.h ../../include/linux/mm.h ../../include/signal.h \ + ../../include/linux/kernel.h ../../include/linux/hdreg.h \ + ../../include/asm/system.h ../../include/asm/io.h \ + ../../include/asm/segment.h blk.h +ll_rw_blk.s ll_rw_blk.o : ll_rw_blk.c ../../include/errno.h ../../include/linux/sched.h \ + ../../include/linux/head.h ../../include/linux/fs.h \ + ../../include/sys/types.h ../../include/linux/mm.h ../../include/signal.h \ + ../../include/linux/kernel.h ../../include/asm/system.h blk.h diff --git a/os/os/linux/kernel/blk_drv/blk.h b/os/os/linux/kernel/blk_drv/blk.h new file mode 100644 index 0000000..7a69b71 --- /dev/null +++ b/os/os/linux/kernel/blk_drv/blk.h @@ -0,0 +1,140 @@ +#ifndef _BLK_H +#define _BLK_H + +#define NR_BLK_DEV 7 +/* + * NR_REQUEST is the number of entries in the request-queue. + * NOTE that writes may use only the low 2/3 of these: reads + * take precedence. + * + * 32 seems to be a reasonable number: enough to get some benefit + * from the elevator-mechanism, but not so much as to lock a lot of + * buffers when they are in the queue. 64 seems to be too many (easily + * long pauses in reading when heavy writing/syncing is going on) + */ +#define NR_REQUEST 32 + +/* + * Ok, this is an expanded form so that we can use the same + * request for paging requests when that is implemented. In + * paging, 'bh' is NULL, and 'waiting' is used to wait for + * read/write completion. + */ +struct request { + int dev; /* -1 if no request */ + int cmd; /* READ or WRITE */ + int errors; + unsigned long sector; + unsigned long nr_sectors; + char * buffer; + struct task_struct * waiting; + struct buffer_head * bh; + struct request * next; +}; + +/* + * This is used in the elevator algorithm: Note that + * reads always go before writes. This is natural: reads + * are much more time-critical than writes. + */ +#define IN_ORDER(s1,s2) \ +((s1)->cmd<(s2)->cmd || (s1)->cmd==(s2)->cmd && \ +((s1)->dev < (s2)->dev || ((s1)->dev == (s2)->dev && \ +(s1)->sector < (s2)->sector))) + +struct blk_dev_struct { + void (*request_fn)(void); + struct request * current_request; +}; + +extern struct blk_dev_struct blk_dev[NR_BLK_DEV]; +extern struct request request[NR_REQUEST]; +extern struct task_struct * wait_for_request; + +#ifdef MAJOR_NR + +/* + * Add entries as needed. Currently the only block devices + * supported are hard-disks and floppies. + */ + +#if (MAJOR_NR == 1) +/* ram disk */ +#define DEVICE_NAME "ramdisk" +#define DEVICE_REQUEST do_rd_request +#define DEVICE_NR(device) ((device) & 7) +#define DEVICE_ON(device) +#define DEVICE_OFF(device) + +#elif (MAJOR_NR == 2) +/* floppy */ +#define DEVICE_NAME "floppy" +#define DEVICE_INTR do_floppy +#define DEVICE_REQUEST do_fd_request +#define DEVICE_NR(device) ((device) & 3) +#define DEVICE_ON(device) floppy_on(DEVICE_NR(device)) +#define DEVICE_OFF(device) floppy_off(DEVICE_NR(device)) + +#elif (MAJOR_NR == 3) +/* harddisk */ +#define DEVICE_NAME "harddisk" +#define DEVICE_INTR do_hd +#define DEVICE_REQUEST do_hd_request +#define DEVICE_NR(device) (MINOR(device)/5) +#define DEVICE_ON(device) +#define DEVICE_OFF(device) + +#elif (MAJOR_NR > 3) +/* unknown blk device */ +#error "unknown blk device" + +#endif + +#define CURRENT (blk_dev[MAJOR_NR].current_request) +#define CURRENT_DEV DEVICE_NR(CURRENT->dev) + +#ifdef DEVICE_INTR +void (*DEVICE_INTR)(void) = NULL; +#endif +static void (DEVICE_REQUEST)(void); + +static inline void unlock_buffer(struct buffer_head * bh) +{ + if (!bh->b_lock) + printk(DEVICE_NAME ": free buffer being unlocked\n"); + bh->b_lock=0; + wake_up(&bh->b_wait); +} + +static inline void end_request(int uptodate) +{ + DEVICE_OFF(CURRENT->dev); + if (CURRENT->bh) { + CURRENT->bh->b_uptodate = uptodate; + unlock_buffer(CURRENT->bh); + } + if (!uptodate) { + printk(DEVICE_NAME " I/O error\n\r"); + printk("dev %04x, block %d\n\r",CURRENT->dev, + CURRENT->bh->b_blocknr); + } + wake_up(&CURRENT->waiting); + wake_up(&wait_for_request); + CURRENT->dev = -1; + CURRENT = CURRENT->next; +} + +#define INIT_REQUEST \ +repeat: \ + if (!CURRENT) \ + return; \ + if (MAJOR(CURRENT->dev) != MAJOR_NR) \ + panic(DEVICE_NAME ": request list destroyed"); \ + if (CURRENT->bh) { \ + if (!CURRENT->bh->b_lock) \ + panic(DEVICE_NAME ": block not locked"); \ + } + +#endif + +#endif diff --git a/os/os/linux/kernel/blk_drv/blk_drv.a b/os/os/linux/kernel/blk_drv/blk_drv.a new file mode 100644 index 0000000..02751f1 Binary files /dev/null and b/os/os/linux/kernel/blk_drv/blk_drv.a differ diff --git a/os/os/linux/kernel/blk_drv/floppy.c b/os/os/linux/kernel/blk_drv/floppy.c new file mode 100644 index 0000000..b1a7f3a --- /dev/null +++ b/os/os/linux/kernel/blk_drv/floppy.c @@ -0,0 +1,463 @@ +/* + * linux/kernel/floppy.c + * + * (C) 1991 Linus Torvalds + */ + +/* + * 02.12.91 - Changed to static variables to indicate need for reset + * and recalibrate. This makes some things easier (output_byte reset + * checking etc), and means less interrupt jumping in case of errors, + * so the code is hopefully easier to understand. + */ + +/* + * This file is certainly a mess. I've tried my best to get it working, + * but I don't like programming floppies, and I have only one anyway. + * Urgel. I should check for more errors, and do more graceful error + * recovery. Seems there are problems with several drives. I've tried to + * correct them. No promises. + */ + +/* + * As with hd.c, all routines within this file can (and will) be called + * by interrupts, so extreme caution is needed. A hardware interrupt + * handler may not sleep, or a kernel panic will happen. Thus I cannot + * call "floppy-on" directly, but have to set a special timer interrupt + * etc. + * + * Also, I'm not certain this works on more than 1 floppy. Bugs may + * abund. + */ + +#include +#include +#include +#include +#include +#include +#include + +#define MAJOR_NR 2 +#include "blk.h" + +static int recalibrate = 0; +static int reset = 0; +static int seek = 0; + +extern unsigned char current_DOR; + +#define immoutb_p(val,port) \ +__asm__("outb %0,%1\n\tjmp 1f\n1:\tjmp 1f\n1:"::"a" ((char) (val)),"i" (port)) + +#define TYPE(x) ((x)>>2) +#define DRIVE(x) ((x)&0x03) +/* + * Note that MAX_ERRORS=8 doesn't imply that we retry every bad read + * max 8 times - some types of errors increase the errorcount by 2, + * so we might actually retry only 5-6 times before giving up. + */ +#define MAX_ERRORS 8 + +/* + * globals used by 'result()' + */ +#define MAX_REPLIES 7 +static unsigned char reply_buffer[MAX_REPLIES]; +#define ST0 (reply_buffer[0]) +#define ST1 (reply_buffer[1]) +#define ST2 (reply_buffer[2]) +#define ST3 (reply_buffer[3]) + +/* + * This struct defines the different floppy types. Unlike minix + * linux doesn't have a "search for right type"-type, as the code + * for that is convoluted and weird. I've got enough problems with + * this driver as it is. + * + * The 'stretch' tells if the tracks need to be boubled for some + * types (ie 360kB diskette in 1.2MB drive etc). Others should + * be self-explanatory. + */ +static struct floppy_struct { + unsigned int size, sect, head, track, stretch; + unsigned char gap,rate,spec1; +} floppy_type[] = { + { 0, 0,0, 0,0,0x00,0x00,0x00 }, /* no testing */ + { 720, 9,2,40,0,0x2A,0x02,0xDF }, /* 360kB PC diskettes */ + { 2400,15,2,80,0,0x1B,0x00,0xDF }, /* 1.2 MB AT-diskettes */ + { 720, 9,2,40,1,0x2A,0x02,0xDF }, /* 360kB in 720kB drive */ + { 1440, 9,2,80,0,0x2A,0x02,0xDF }, /* 3.5" 720kB diskette */ + { 720, 9,2,40,1,0x23,0x01,0xDF }, /* 360kB in 1.2MB drive */ + { 1440, 9,2,80,0,0x23,0x01,0xDF }, /* 720kB in 1.2MB drive */ + { 2880,18,2,80,0,0x1B,0x00,0xCF }, /* 1.44MB diskette */ +}; +/* + * Rate is 0 for 500kb/s, 2 for 300kbps, 1 for 250kbps + * Spec1 is 0xSH, where S is stepping rate (F=1ms, E=2ms, D=3ms etc), + * H is head unload time (1=16ms, 2=32ms, etc) + * + * Spec2 is (HLD<<1 | ND), where HLD is head load time (1=2ms, 2=4 ms etc) + * and ND is set means no DMA. Hardcoded to 6 (HLD=6ms, use DMA). + */ + +extern void floppy_interrupt(void); +extern char tmp_floppy_area[1024]; + +/* + * These are global variables, as that's the easiest way to give + * information to interrupts. They are the data used for the current + * request. + */ +static int cur_spec1 = -1; +static int cur_rate = -1; +static struct floppy_struct * floppy = floppy_type; +static unsigned char current_drive = 0; +static unsigned char sector = 0; +static unsigned char head = 0; +static unsigned char track = 0; +static unsigned char seek_track = 0; +static unsigned char current_track = 255; +static unsigned char command = 0; +unsigned char selected = 0; +struct task_struct * wait_on_floppy_select = NULL; + +void floppy_deselect(unsigned int nr) +{ + if (nr != (current_DOR & 3)) + printk("floppy_deselect: drive not selected\n\r"); + selected = 0; + wake_up(&wait_on_floppy_select); +} + +/* + * floppy-change is never called from an interrupt, so we can relax a bit + * here, sleep etc. Note that floppy-on tries to set current_DOR to point + * to the desired drive, but it will probably not survive the sleep if + * several floppies are used at the same time: thus the loop. + */ +int floppy_change(unsigned int nr) +{ +repeat: + floppy_on(nr); + while ((current_DOR & 3) != nr && selected) + interruptible_sleep_on(&wait_on_floppy_select); + if ((current_DOR & 3) != nr) + goto repeat; + if (inb(FD_DIR) & 0x80) { + floppy_off(nr); + return 1; + } + floppy_off(nr); + return 0; +} + +#define copy_buffer(from,to) \ +__asm__("cld ; rep ; movsl" \ + ::"c" (BLOCK_SIZE/4),"S" ((long)(from)),"D" ((long)(to)) \ + ) + +static void setup_DMA(void) +{ + long addr = (long) CURRENT->buffer; + + cli(); + if (addr >= 0x100000) { + addr = (long) tmp_floppy_area; + if (command == FD_WRITE) + copy_buffer(CURRENT->buffer,tmp_floppy_area); + } +/* mask DMA 2 */ + immoutb_p(4|2,10); +/* output command byte. I don't know why, but everyone (minix, */ +/* sanches & canton) output this twice, first to 12 then to 11 */ + __asm__("outb %%al,$12\n\tjmp 1f\n1:\tjmp 1f\n1:\t" + "outb %%al,$11\n\tjmp 1f\n1:\tjmp 1f\n1:":: + "a" ((char) ((command == FD_READ)?DMA_READ:DMA_WRITE))); +/* 8 low bits of addr */ + immoutb_p(addr,4); + addr >>= 8; +/* bits 8-15 of addr */ + immoutb_p(addr,4); + addr >>= 8; +/* bits 16-19 of addr */ + immoutb_p(addr,0x81); +/* low 8 bits of count-1 (1024-1=0x3ff) */ + immoutb_p(0xff,5); +/* high 8 bits of count-1 */ + immoutb_p(3,5); +/* activate DMA 2 */ + immoutb_p(0|2,10); + sti(); +} + +static void output_byte(char byte) +{ + int counter; + unsigned char status; + + if (reset) + return; + for(counter = 0 ; counter < 10000 ; counter++) { + status = inb_p(FD_STATUS) & (STATUS_READY | STATUS_DIR); + if (status == STATUS_READY) { + outb(byte,FD_DATA); + return; + } + } + reset = 1; + printk("Unable to send byte to FDC\n\r"); +} + +static int result(void) +{ + int i = 0, counter, status; + + if (reset) + return -1; + for (counter = 0 ; counter < 10000 ; counter++) { + status = inb_p(FD_STATUS)&(STATUS_DIR|STATUS_READY|STATUS_BUSY); + if (status == STATUS_READY) + return i; + if (status == (STATUS_DIR|STATUS_READY|STATUS_BUSY)) { + if (i >= MAX_REPLIES) + break; + reply_buffer[i++] = inb_p(FD_DATA); + } + } + reset = 1; + printk("Getstatus times out\n\r"); + return -1; +} + +static void bad_flp_intr(void) +{ + CURRENT->errors++; + if (CURRENT->errors > MAX_ERRORS) { + floppy_deselect(current_drive); + end_request(0); + } + if (CURRENT->errors > MAX_ERRORS/2) + reset = 1; + else + recalibrate = 1; +} + +/* + * Ok, this interrupt is called after a DMA read/write has succeeded, + * so we check the results, and copy any buffers. + */ +static void rw_interrupt(void) +{ + if (result() != 7 || (ST0 & 0xf8) || (ST1 & 0xbf) || (ST2 & 0x73)) { + if (ST1 & 0x02) { + printk("Drive %d is write protected\n\r",current_drive); + floppy_deselect(current_drive); + end_request(0); + } else + bad_flp_intr(); + do_fd_request(); + return; + } + if (command == FD_READ && (unsigned long)(CURRENT->buffer) >= 0x100000) + copy_buffer(tmp_floppy_area,CURRENT->buffer); + floppy_deselect(current_drive); + end_request(1); + do_fd_request(); +} + +inline void setup_rw_floppy(void) +{ + setup_DMA(); + do_floppy = rw_interrupt; + output_byte(command); + output_byte(head<<2 | current_drive); + output_byte(track); + output_byte(head); + output_byte(sector); + output_byte(2); /* sector size = 512 */ + output_byte(floppy->sect); + output_byte(floppy->gap); + output_byte(0xFF); /* sector size (0xff when n!=0 ?) */ + if (reset) + do_fd_request(); +} + +/* + * This is the routine called after every seek (or recalibrate) interrupt + * from the floppy controller. Note that the "unexpected interrupt" routine + * also does a recalibrate, but doesn't come here. + */ +static void seek_interrupt(void) +{ +/* sense drive status */ + output_byte(FD_SENSEI); + if (result() != 2 || (ST0 & 0xF8) != 0x20 || ST1 != seek_track) { + bad_flp_intr(); + do_fd_request(); + return; + } + current_track = ST1; + setup_rw_floppy(); +} + +/* + * This routine is called when everything should be correctly set up + * for the transfer (ie floppy motor is on and the correct floppy is + * selected). + */ +static void transfer(void) +{ + if (cur_spec1 != floppy->spec1) { + cur_spec1 = floppy->spec1; + output_byte(FD_SPECIFY); + output_byte(cur_spec1); /* hut etc */ + output_byte(6); /* Head load time =6ms, DMA */ + } + if (cur_rate != floppy->rate) + outb_p(cur_rate = floppy->rate,FD_DCR); + if (reset) { + do_fd_request(); + return; + } + if (!seek) { + setup_rw_floppy(); + return; + } + do_floppy = seek_interrupt; + if (seek_track) { + output_byte(FD_SEEK); + output_byte(head<<2 | current_drive); + output_byte(seek_track); + } else { + output_byte(FD_RECALIBRATE); + output_byte(head<<2 | current_drive); + } + if (reset) + do_fd_request(); +} + +/* + * Special case - used after a unexpected interrupt (or reset) + */ +static void recal_interrupt(void) +{ + output_byte(FD_SENSEI); + if (result()!=2 || (ST0 & 0xE0) == 0x60) + reset = 1; + else + recalibrate = 0; + do_fd_request(); +} + +void unexpected_floppy_interrupt(void) +{ + output_byte(FD_SENSEI); + if (result()!=2 || (ST0 & 0xE0) == 0x60) + reset = 1; + else + recalibrate = 1; +} + +static void recalibrate_floppy(void) +{ + recalibrate = 0; + current_track = 0; + current_drive = 1; /* by wyj, ?? */ + do_floppy = recal_interrupt; + output_byte(FD_RECALIBRATE); + output_byte(head<<2 | current_drive); + if (reset) + do_fd_request(); +} + +static void reset_interrupt(void) +{ + output_byte(FD_SENSEI); + (void) result(); + output_byte(FD_SPECIFY); + output_byte(cur_spec1); /* hut etc */ + output_byte(6); /* Head load time =6ms, DMA */ + do_fd_request(); +} + +/* + * reset is done by pulling bit 2 of DOR low for a while. + */ +static void reset_floppy(void) +{ + int i; + + reset = 0; + cur_spec1 = -1; + cur_rate = -1; + recalibrate = 1; + printk("Reset-floppy called\n\r"); + cli(); + do_floppy = reset_interrupt; + outb_p(current_DOR & ~0x04,FD_DOR); + for (i=0 ; i<100 ; i++) + __asm__("nop"); + outb(current_DOR,FD_DOR); + sti(); +} + +static void floppy_on_interrupt(void) +{ +/* We cannot do a floppy-select, as that might sleep. We just force it */ + selected = 1; + if (current_drive != (current_DOR & 3)) { + current_DOR &= 0xFC; + current_DOR |= current_drive; + outb(current_DOR,FD_DOR); + add_timer(2,&transfer); + } else + transfer(); +} + +void do_fd_request(void) +{ + unsigned int block; + + seek = 0; + if (reset) { + reset_floppy(); + return; + } + if (recalibrate) { + recalibrate_floppy(); + return; + } + INIT_REQUEST; + floppy = (MINOR(CURRENT->dev)>>2) + floppy_type; + if (current_drive != CURRENT_DEV) + seek = 1; + current_drive = CURRENT_DEV; + block = CURRENT->sector; + if (block+2 > floppy->size) { + end_request(0); + goto repeat; + } + sector = block % floppy->sect; + block /= floppy->sect; + head = block % floppy->head; + track = block / floppy->head; + seek_track = track << floppy->stretch; + if (seek_track != current_track) + seek = 1; + sector++; + if (CURRENT->cmd == READ) + command = FD_READ; + else if (CURRENT->cmd == WRITE) + command = FD_WRITE; + else + panic("do_fd_request: unknown command"); + add_timer(ticks_to_floppy_on(current_drive),&floppy_on_interrupt); +} + +void floppy_init(void) +{ + blk_dev[MAJOR_NR].request_fn = DEVICE_REQUEST; + set_trap_gate(0x26,&floppy_interrupt); + outb(inb_p(0x21)&~0x40,0x21); +} diff --git a/os/os/linux/kernel/blk_drv/floppy.o b/os/os/linux/kernel/blk_drv/floppy.o new file mode 100644 index 0000000..33235bc Binary files /dev/null and b/os/os/linux/kernel/blk_drv/floppy.o differ diff --git a/os/os/linux/kernel/blk_drv/hd.c b/os/os/linux/kernel/blk_drv/hd.c new file mode 100644 index 0000000..c0e908f --- /dev/null +++ b/os/os/linux/kernel/blk_drv/hd.c @@ -0,0 +1,351 @@ +/* + * linux/kernel/hd.c + * + * (C) 1991 Linus Torvalds + */ + +/* + * This is the low-level hd interrupt support. It traverses the + * request-list, using interrupts to jump between functions. As + * all the functions are called within interrupts, we may not + * sleep. Special care is recommended. + * + * modified by Drew Eckhardt to check nr of hd's from the CMOS. + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +#define MAJOR_NR 3 +#include "blk.h" + +#define CMOS_READ(addr) ({ \ +outb_p(0x80|addr,0x70); \ +inb_p(0x71); \ +}) + +/* Max read/write errors/sector */ +#define MAX_ERRORS 7 +#define MAX_HD 2 + +static void recal_intr(void); + +static int recalibrate = 0; /* 1, wen */ +static int reset = 0; + +/* + * This struct defines the HD's and their types. + */ +struct hd_i_struct { + int head,sect,cyl,wpcom,lzone,ctl; + }; +#ifdef HD_TYPE +struct hd_i_struct hd_info[] = { HD_TYPE }; +#define NR_HD ((sizeof (hd_info))/(sizeof (struct hd_i_struct))) +#else +struct hd_i_struct hd_info[] = { {0,0,0,0,0,0},{0,0,0,0,0,0} }; +static int NR_HD = 0; +#endif + +static struct hd_struct { + long start_sect; + long nr_sects; +} hd[5*MAX_HD]={{0,0},}; + +#define port_read(port,buf,nr) \ +__asm__("cld;rep;insw"::"d" (port),"D" (buf),"c" (nr)) + +#define port_write(port,buf,nr) \ +__asm__("cld;rep;outsw"::"d" (port),"S" (buf),"c" (nr)) + +extern void hd_interrupt(void); +extern void rd_load(void); + +/* This may be used only once, enforced by 'static int callable' */ +int sys_setup(void * BIOS) +{ + static int callable = 1; + int i,drive; + unsigned char cmos_disks; + struct partition *p; + struct buffer_head * bh; + + if (!callable) + return -1; + callable = 0; +#ifndef HD_TYPE + for (drive=0 ; drive<2 ; drive++) { + hd_info[drive].cyl = *(unsigned short *) BIOS; + hd_info[drive].head = *(unsigned char *) (2+BIOS); + hd_info[drive].wpcom = *(unsigned short *) (5+BIOS); + hd_info[drive].ctl = *(unsigned char *) (8+BIOS); + hd_info[drive].lzone = *(unsigned short *) (12+BIOS); + hd_info[drive].sect = *(unsigned char *) (14+BIOS); + BIOS += 16; + } + if (hd_info[1].cyl) + NR_HD=2; + else + NR_HD=1; +#endif + for (i=0 ; i are the primary drives in the system, and + the ones reflected as drive 1 or 2. + + The first drive is stored in the high nibble of CMOS + byte 0x12, the second in the low nibble. This will be + either a 4 bit drive type or 0xf indicating use byte 0x19 + for an 8 bit type, drive 1, 0x1a for drive 2 in CMOS. + + Needless to say, a non-zero value means we have + an AT controller hard disk for that drive. + + + */ + + if ((cmos_disks = CMOS_READ(0x12)) & 0xf0) + if (cmos_disks & 0x0f) + NR_HD = 2; + else + NR_HD = 1; + else + NR_HD = 0; + for (i = NR_HD ; i < 2 ; i++) { + hd[i*5].start_sect = 0; + hd[i*5].nr_sects = 0; + } + for (drive=0 ; driveb_data[510] != 0x55 || (unsigned char) + bh->b_data[511] != 0xAA) { + printk("Bad partition table on drive %d\n\r",drive); + panic(""); + } + p = 0x1BE + (void *)bh->b_data; + for (i=1;i<5;i++,p++) { + hd[i+5*drive].start_sect = p->start_sect; + hd[i+5*drive].nr_sects = p->nr_sects; + } + brelse(bh); + } + if (NR_HD) + printk("Partition table%s ok.\n\r",(NR_HD>1)?"s":""); + rd_load(); + mount_root(); + return (0); +} + +static int controller_ready(void) +{ + /* int retries=10000; */ + int retries=100000; + + /* while (--retries && (inb_p(HD_STATUS)&0xc0)!=0x40); */ + while (--retries && (inb_p(HD_STATUS)&0x80)); + return (retries); +} + +static int win_result(void) +{ + int i=inb_p(HD_STATUS); + + if ((i & (BUSY_STAT | READY_STAT | WRERR_STAT | SEEK_STAT | ERR_STAT)) + == (READY_STAT | SEEK_STAT)) + return(0); /* ok */ + if (i&1) i=inb(HD_ERROR); + return (1); +} + +static void hd_out(unsigned int drive,unsigned int nsect,unsigned int sect, + unsigned int head,unsigned int cyl,unsigned int cmd, + void (*intr_addr)(void)) +{ + register int port asm("dx"); + + if (drive>1 || head>15) + panic("Trying to write bad sector"); + if (!controller_ready()) + panic("HD controller not ready"); + do_hd = intr_addr; + outb_p(hd_info[drive].ctl,HD_CMD); + port=HD_DATA; + outb_p(hd_info[drive].wpcom>>2,++port); + outb_p(nsect,++port); + outb_p(sect,++port); + outb_p(cyl,++port); + outb_p(cyl>>8,++port); + outb_p(0xA0|(drive<<4)|head,++port); + outb(cmd,++port); +} + +static int drive_busy(void) +{ + unsigned int i; + + for (i = 0; i < 10000; i++) + if (READY_STAT == (inb_p(HD_STATUS) & (BUSY_STAT|READY_STAT))) + break; + i = inb(HD_STATUS); + i &= BUSY_STAT | READY_STAT | SEEK_STAT; + if (i == READY_STAT | SEEK_STAT) + return(0); + printk("HD controller times out\n\r"); + return(1); +} + +static void reset_controller(void) +{ + int i; + + outb(4,HD_CMD); + for(i = 0; i < 100; i++) nop(); + outb(hd_info[0].ctl & 0x0f ,HD_CMD); + if (drive_busy()) + printk("HD-controller still busy\n\r"); + if ((i = inb(HD_ERROR)) != 1) + printk("HD-controller reset failed: %02x\n\r",i); +} + +static void reset_hd(int nr) +{ + reset_controller(); + hd_out(nr,hd_info[nr].sect,hd_info[nr].sect,hd_info[nr].head-1, + hd_info[nr].cyl,WIN_SPECIFY,&recal_intr); +} + +void unexpected_hd_interrupt(void) +{ + printk("Unexpected HD interrupt\n\r"); +} + +static void bad_rw_intr(void) +{ + if (++CURRENT->errors >= MAX_ERRORS) + end_request(0); + if (CURRENT->errors > MAX_ERRORS/2) + reset = 1; +} + +static void read_intr(void) +{ + if (win_result()) { + bad_rw_intr(); + do_hd_request(); + return; + } + port_read(HD_DATA,CURRENT->buffer,256); + CURRENT->errors = 0; + CURRENT->buffer += 512; + CURRENT->sector++; + if (--CURRENT->nr_sectors) { + do_hd = &read_intr; + return; + } + end_request(1); + do_hd_request(); +} + +static void write_intr(void) +{ + if (win_result()) { + bad_rw_intr(); + do_hd_request(); + return; + } + if (--CURRENT->nr_sectors) { + CURRENT->sector++; + CURRENT->buffer += 512; + do_hd = &write_intr; + port_write(HD_DATA,CURRENT->buffer,256); + return; + } + end_request(1); + do_hd_request(); +} + +static void recal_intr(void) +{ + if (win_result()) + bad_rw_intr(); + do_hd_request(); +} + +void do_hd_request(void) +{ + int i,r; + unsigned int block,dev; + unsigned int sec,head,cyl; + unsigned int nsect; + + INIT_REQUEST; + dev = MINOR(CURRENT->dev); + block = CURRENT->sector; + if (dev >= 5*NR_HD || block+2 > hd[dev].nr_sects) { + end_request(0); + goto repeat; + } + block += hd[dev].start_sect; + dev /= 5; + __asm__("divl %4":"=a" (block),"=d" (sec):"0" (block),"1" (0), + "r" (hd_info[dev].sect)); + __asm__("divl %4":"=a" (cyl),"=d" (head):"0" (block),"1" (0), + "r" (hd_info[dev].head)); + sec++; + nsect = CURRENT->nr_sectors; + if (reset) { + reset = 0; + recalibrate = 1; + reset_hd(CURRENT_DEV); + return; + } + if (recalibrate) { + recalibrate = 0; + hd_out(dev,hd_info[CURRENT_DEV].sect,0,0,0, + WIN_RESTORE,&recal_intr); + return; + } + if (CURRENT->cmd == WRITE) { + hd_out(dev,nsect,sec,head,cyl,WIN_WRITE,&write_intr); + for(i=0 ; i<3000 && !(r=inb_p(HD_STATUS)&DRQ_STAT) ; i++) + /* nothing */ ; + if (!r) { + bad_rw_intr(); + goto repeat; + } + port_write(HD_DATA,CURRENT->buffer,256); + } else if (CURRENT->cmd == READ) { + hd_out(dev,nsect,sec,head,cyl,WIN_READ,&read_intr); + } else + panic("unknown hd-command"); +} + +void hd_init(void) +{ + blk_dev[MAJOR_NR].request_fn = DEVICE_REQUEST; + set_intr_gate(0x2E,&hd_interrupt); + outb_p(inb_p(0x21)&0xfb,0x21); + outb(inb_p(0xA1)&0xbf,0xA1); +} diff --git a/os/os/linux/kernel/blk_drv/hd.o b/os/os/linux/kernel/blk_drv/hd.o new file mode 100644 index 0000000..bf2b0d1 Binary files /dev/null and b/os/os/linux/kernel/blk_drv/hd.o differ diff --git a/os/os/linux/kernel/blk_drv/ll_rw_blk.c b/os/os/linux/kernel/blk_drv/ll_rw_blk.c new file mode 100644 index 0000000..f57d998 --- /dev/null +++ b/os/os/linux/kernel/blk_drv/ll_rw_blk.c @@ -0,0 +1,165 @@ +/* + * linux/kernel/blk_dev/ll_rw.c + * + * (C) 1991 Linus Torvalds + */ + +/* + * This handles all read/write requests to block devices + */ +#include +#include +#include +#include + +#include "blk.h" + +/* + * The request-struct contains all necessary data + * to load a nr of sectors into memory + */ +struct request request[NR_REQUEST]; + +/* + * used to wait on when there are no free requests + */ +struct task_struct * wait_for_request = NULL; + +/* blk_dev_struct is: + * do_request-address + * next-request + */ +struct blk_dev_struct blk_dev[NR_BLK_DEV] = { + { NULL, NULL }, /* no_dev */ + { NULL, NULL }, /* dev mem */ + { NULL, NULL }, /* dev fd */ + { NULL, NULL }, /* dev hd */ + { NULL, NULL }, /* dev ttyx */ + { NULL, NULL }, /* dev tty */ + { NULL, NULL } /* dev lp */ +}; + +static inline void lock_buffer(struct buffer_head * bh) +{ + cli(); + while (bh->b_lock) + sleep_on(&bh->b_wait); + bh->b_lock=1; + sti(); +} + +static inline void unlock_buffer(struct buffer_head * bh) +{ + if (!bh->b_lock) + printk("ll_rw_block.c: buffer not locked\n\r"); + bh->b_lock = 0; + wake_up(&bh->b_wait); +} + +/* + * add-request adds a request to the linked list. + * It disables interrupts so that it can muck with the + * request-lists in peace. + */ +static void add_request(struct blk_dev_struct * dev, struct request * req) +{ + struct request * tmp; + + req->next = NULL; + cli(); + if (req->bh) + req->bh->b_dirt = 0; + if (!(tmp = dev->current_request)) { + dev->current_request = req; + sti(); + (dev->request_fn)(); + return; + } + for ( ; tmp->next ; tmp=tmp->next) + if ((IN_ORDER(tmp,req) || + !IN_ORDER(tmp,tmp->next)) && + IN_ORDER(req,tmp->next)) + break; + req->next=tmp->next; + tmp->next=req; + sti(); +} + +static void make_request(int major,int rw, struct buffer_head * bh) +{ + struct request * req; + int rw_ahead; + +/* WRITEA/READA is special case - it is not really needed, so if the */ +/* buffer is locked, we just forget about it, else it's a normal read */ + if (rw_ahead = (rw == READA || rw == WRITEA)) { + if (bh->b_lock) + return; + if (rw == READA) + rw = READ; + else + rw = WRITE; + } + if (rw!=READ && rw!=WRITE) + panic("Bad block dev command, must be R/W/RA/WA"); + lock_buffer(bh); + if ((rw == WRITE && !bh->b_dirt) || (rw == READ && bh->b_uptodate)) { + unlock_buffer(bh); + return; + } +repeat: +/* we don't allow the write-requests to fill up the queue completely: + * we want some room for reads: they take precedence. The last third + * of the requests are only for reads. + */ + if (rw == READ) + req = request+NR_REQUEST; + else + req = request+((NR_REQUEST*2)/3); +/* find an empty request */ + while (--req >= request) + if (req->dev<0) + break; +/* if none found, sleep on new requests: check for rw_ahead */ + if (req < request) { + if (rw_ahead) { + unlock_buffer(bh); + return; + } + sleep_on(&wait_for_request); + goto repeat; + } +/* fill up the request-info, and add it to the queue */ + req->dev = bh->b_dev; + req->cmd = rw; + req->errors=0; + req->sector = bh->b_blocknr<<1; + req->nr_sectors = 2; + req->buffer = bh->b_data; + req->waiting = NULL; + req->bh = bh; + req->next = NULL; + add_request(major+blk_dev,req); +} + +void ll_rw_block(int rw, struct buffer_head * bh) +{ + unsigned int major; + + if ((major=MAJOR(bh->b_dev)) >= NR_BLK_DEV || + !(blk_dev[major].request_fn)) { + printk("Trying to read nonexistent block-device\n\r"); + return; + } + make_request(major,rw,bh); +} + +void blk_dev_init(void) +{ + int i; + + for (i=0 ; i + +#include +#include +#include +#include +#include +#include +#include + +#define MAJOR_NR 1 +#include "blk.h" + +char *rd_start; +int rd_length = 0; + +void do_rd_request(void) +{ + int len; + char *addr; + + INIT_REQUEST; + addr = rd_start + (CURRENT->sector << 9); + len = CURRENT->nr_sectors << 9; + if ((MINOR(CURRENT->dev) != 1) || (addr+len > rd_start+rd_length)) { + end_request(0); + goto repeat; + } + if (CURRENT-> cmd == WRITE) { + (void ) memcpy(addr, + CURRENT->buffer, + len); + } else if (CURRENT->cmd == READ) { + (void) memcpy(CURRENT->buffer, + addr, + len); + } else + panic("unknown ramdisk-command"); + end_request(1); + goto repeat; +} + +/* + * Returns amount of memory which needs to be reserved. + */ +long rd_init(long mem_start, int length) +{ + int i; + char *cp; + + blk_dev[MAJOR_NR].request_fn = DEVICE_REQUEST; + rd_start = (char *) mem_start; + rd_length = length; + cp = rd_start; + for (i=0; i < length; i++) + *cp++ = '\0'; + return(length); +} + +/* + * If the root device is the ram disk, try to load it. + * In order to do this, the root device is originally set to the + * floppy, and we later change it to be ram disk. + */ +void rd_load(void) +{ + struct buffer_head *bh; + struct super_block s; + int block = 256; /* Start at block 256 */ + int i = 1; + int nblocks; + char *cp; /* Move pointer */ + + if (!rd_length) + return; + printk("Ram disk: %d bytes, starting at 0x%x\n", rd_length, + (int) rd_start); + if (MAJOR(ROOT_DEV) != 2) + return; + bh = breada(ROOT_DEV,block+1,block,block+2,-1); + if (!bh) { + printk("Disk error while looking for ramdisk!\n"); + return; + } + __asm__ volatile ("cld"); /* by wyj */ + *((struct d_super_block *) &s) = *((struct d_super_block *) bh->b_data); + brelse(bh); + if (s.s_magic != SUPER_MAGIC) + /* No ram disk image present, assume normal floppy boot */ + return; + nblocks = s.s_nzones << s.s_log_zone_size; + if (nblocks > (rd_length >> BLOCK_SIZE_BITS)) { + printk("Ram disk image too big! (%d blocks, %d avail)\n", + nblocks, rd_length >> BLOCK_SIZE_BITS); + return; + } + printk("Loading %d bytes into ram disk... 0000k", + nblocks << BLOCK_SIZE_BITS); + cp = rd_start; + while (nblocks) { + if (nblocks > 2) + bh = breada(ROOT_DEV, block, block+1, block+2, -1); + else + bh = bread(ROOT_DEV, block); + if (!bh) { + printk("I/O error on block %d, aborting load\n", + block); + return; + } + (void) memcpy(cp, bh->b_data, BLOCK_SIZE); + brelse(bh); + printk("\010\010\010\010\010%4dk",i); + cp += BLOCK_SIZE; + block++; + nblocks--; + i++; + } + printk("\010\010\010\010\010done \n"); + ROOT_DEV=0x0101; +} diff --git a/os/os/linux/kernel/blk_drv/ramdisk.o b/os/os/linux/kernel/blk_drv/ramdisk.o new file mode 100644 index 0000000..d37a922 Binary files /dev/null and b/os/os/linux/kernel/blk_drv/ramdisk.o differ diff --git a/os/os/linux/kernel/chr_drv/Makefile b/os/os/linux/kernel/chr_drv/Makefile new file mode 100644 index 0000000..9d4d8d1 --- /dev/null +++ b/os/os/linux/kernel/chr_drv/Makefile @@ -0,0 +1,68 @@ +# +# Makefile for the FREAX-kernel character device drivers. +# +# Note! Dependencies are done automagically by 'make dep', which also +# removes any old dependencies. DON'T put your own dependencies here +# unless it's something special (ie not a .c file). +# + +AR =ar +AS =as +LD =ld +LDFLAGS =-s -x +CC =gcc -march=i386 +CFLAGS =-w -g -fstrength-reduce -fomit-frame-pointer -mcld \ + -finline-functions -nostdinc -fno-stack-protector -I../../include +CPP =gcc -E -nostdinc -I../../include + +.c.s: + $(CC) $(CFLAGS) \ + -S -o $*.s $< +.s.o: + $(AS) -o $*.o $< +.c.o: + $(CC) $(CFLAGS) \ + -c -o $*.o $< + +OBJS = tty_io.o console.o keyboard.2.o serial.o rs_io.o \ + tty_ioctl.o + +chr_drv.a: $(OBJS) + $(AR) rcs chr_drv.a $(OBJS) + sync + +keyboard.2.s: keyboard.S ../../include/linux/config.h + $(CPP) -traditional keyboard.S -o keyboard.2.s + +clean: + rm -f core *.o *.a tmp_make keyboard.2.s + for i in *.c;do rm -f `basename $$i .c`.s;done + +dep: + sed '/\#\#\# Dependencies/q' < Makefile > tmp_make + (for i in *.c;do echo -n `echo $$i | sed 's,\.c,\.s,'`" "; \ + $(CPP) -M $$i;done) >> tmp_make + cp tmp_make Makefile + +### Dependencies: +console.s console.o : console.c ../../include/linux/sched.h \ + ../../include/linux/head.h ../../include/linux/fs.h \ + ../../include/sys/types.h ../../include/linux/mm.h ../../include/signal.h \ + ../../include/linux/tty.h ../../include/termios.h ../../include/asm/io.h \ + ../../include/asm/system.h +serial.s serial.o : serial.c ../../include/linux/tty.h ../../include/termios.h \ + ../../include/linux/sched.h ../../include/linux/head.h \ + ../../include/linux/fs.h ../../include/sys/types.h ../../include/linux/mm.h \ + ../../include/signal.h ../../include/asm/system.h ../../include/asm/io.h +tty_io.s tty_io.o : tty_io.c ../../include/ctype.h ../../include/errno.h \ + ../../include/signal.h ../../include/sys/types.h \ + ../../include/linux/sched.h ../../include/linux/head.h \ + ../../include/linux/fs.h ../../include/linux/mm.h ../../include/linux/tty.h \ + ../../include/termios.h ../../include/asm/segment.h \ + ../../include/asm/system.h +tty_ioctl.s tty_ioctl.o : tty_ioctl.c ../../include/errno.h ../../include/termios.h \ + ../../include/linux/sched.h ../../include/linux/head.h \ + ../../include/linux/fs.h ../../include/sys/types.h ../../include/linux/mm.h \ + ../../include/signal.h ../../include/linux/kernel.h \ + ../../include/linux/tty.h ../../include/asm/io.h \ + ../../include/asm/segment.h ../../include/asm/system.h diff --git a/os/os/linux/kernel/chr_drv/chr_drv.a b/os/os/linux/kernel/chr_drv/chr_drv.a new file mode 100644 index 0000000..d2f3869 Binary files /dev/null and b/os/os/linux/kernel/chr_drv/chr_drv.a differ diff --git a/os/os/linux/kernel/chr_drv/console.c b/os/os/linux/kernel/chr_drv/console.c new file mode 100644 index 0000000..a12ffbf --- /dev/null +++ b/os/os/linux/kernel/chr_drv/console.c @@ -0,0 +1,710 @@ +/* + * linux/kernel/console.c + * + * (C) 1991 Linus Torvalds + */ + +/* + * console.c + * + * This module implements the console io functions + * 'void con_init(void)' + * 'void con_write(struct tty_queue * queue)' + * Hopefully this will be a rather complete VT102 implementation. + * + * Beeping thanks to John T Kohl. + */ + +/* + * NOTE!!! We sometimes disable and enable interrupts for a short while + * (to put a word in video IO), but this will work even for keyboard + * interrupts. We know interrupts aren't enabled when getting a keyboard + * interrupt, as we use trap-gates. Hopefully all is well. + */ + +/* + * Code to check for different video-cards mostly by Galen Hunt, + * + */ + +#include +#include +#include +#include + +/* + * These are set up by the setup-routine at boot-time: + */ + +#define ORIG_X (*(unsigned char *)0x90000) +#define ORIG_Y (*(unsigned char *)0x90001) +#define ORIG_VIDEO_PAGE (*(unsigned short *)0x90004) +#define ORIG_VIDEO_MODE ((*(unsigned short *)0x90006) & 0xff) +#define ORIG_VIDEO_COLS (((*(unsigned short *)0x90006) & 0xff00) >> 8) +#define ORIG_VIDEO_LINES (25) +#define ORIG_VIDEO_EGA_AX (*(unsigned short *)0x90008) +#define ORIG_VIDEO_EGA_BX (*(unsigned short *)0x9000a) +#define ORIG_VIDEO_EGA_CX (*(unsigned short *)0x9000c) + +#define VIDEO_TYPE_MDA 0x10 /* Monochrome Text Display */ +#define VIDEO_TYPE_CGA 0x11 /* CGA Display */ +#define VIDEO_TYPE_EGAM 0x20 /* EGA/VGA in Monochrome Mode */ +#define VIDEO_TYPE_EGAC 0x21 /* EGA/VGA in Color Mode */ + +#define NPAR 16 + +extern void keyboard_interrupt(void); + +static unsigned char video_type; /* Type of display being used */ +static unsigned long video_num_columns; /* Number of text columns */ +static unsigned long video_size_row; /* Bytes per row */ +static unsigned long video_num_lines; /* Number of test lines */ +static unsigned char video_page; /* Initial video page */ +static unsigned long video_mem_start; /* Start of video RAM */ +static unsigned long video_mem_end; /* End of video RAM (sort of) */ +static unsigned short video_port_reg; /* Video register select port */ +static unsigned short video_port_val; /* Video register value port */ +static unsigned short video_erase_char; /* Char+Attrib to erase with */ + +static unsigned long origin; /* Used for EGA/VGA fast scroll */ +static unsigned long scr_end; /* Used for EGA/VGA fast scroll */ +static unsigned long pos; +static unsigned long x,y; +static unsigned long top,bottom; +static unsigned long state=0; +static unsigned long npar,par[NPAR]; +static unsigned long ques=0; +static unsigned char attr=0x07; + +static void sysbeep(void); + +/* + * this is what the terminal answers to a ESC-Z or csi0c + * query (= vt100 response). + */ +#define RESPONSE "\033[?1;2c" + +/* NOTE! gotoxy thinks x==video_num_columns is ok */ +static inline void gotoxy(unsigned int new_x,unsigned int new_y) +{ + if (new_x > video_num_columns || new_y >= video_num_lines) + return; + x=new_x; + y=new_y; + pos=origin + y*video_size_row + (x<<1); +} + +static inline void set_origin(void) +{ + cli(); + outb_p(12, video_port_reg); + outb_p(0xff&((origin-video_mem_start)>>9), video_port_val); + outb_p(13, video_port_reg); + outb_p(0xff&((origin-video_mem_start)>>1), video_port_val); + sti(); +} + +static void scrup(void) +{ + if (video_type == VIDEO_TYPE_EGAC || video_type == VIDEO_TYPE_EGAM) + { + if (!top && bottom == video_num_lines) { + origin += video_size_row; + pos += video_size_row; + scr_end += video_size_row; + if (scr_end > video_mem_end) { + __asm__("cld\n\t" + "rep\n\t" + "movsl\n\t" + "movl video_num_columns,%1\n\t" + "rep\n\t" + "stosw" + ::"a" (video_erase_char), + "c" ((video_num_lines-1)*video_num_columns>>1), + "D" (video_mem_start), + "S" (origin) + ); + scr_end -= origin-video_mem_start; + pos -= origin-video_mem_start; + origin = video_mem_start; + } else { + __asm__("cld\n\t" + "rep\n\t" + "stosw" + ::"a" (video_erase_char), + "c" (video_num_columns), + "D" (scr_end-video_size_row) + ); + } + set_origin(); + } else { + __asm__("cld\n\t" + "rep\n\t" + "movsl\n\t" + "movl video_num_columns,%%ecx\n\t" + "rep\n\t" + "stosw" + ::"a" (video_erase_char), + "c" ((bottom-top-1)*video_num_columns>>1), + "D" (origin+video_size_row*top), + "S" (origin+video_size_row*(top+1)) + ); + } + } + else /* Not EGA/VGA */ + { + __asm__("cld\n\t" + "rep\n\t" + "movsl\n\t" + "movl video_num_columns,%%ecx\n\t" + "rep\n\t" + "stosw" + ::"a" (video_erase_char), + "c" ((bottom-top-1)*video_num_columns>>1), + "D" (origin+video_size_row*top), + "S" (origin+video_size_row*(top+1)) + ); + } +} + +static void scrdown(void) +{ + if (video_type == VIDEO_TYPE_EGAC || video_type == VIDEO_TYPE_EGAM) + { + __asm__("std\n\t" + "rep\n\t" + "movsl\n\t" + "addl $2,%%edi\n\t" /* %edi has been decremented by 4 */ + "movl video_num_columns,%%ecx\n\t" + "rep\n\t" + "stosw" + ::"a" (video_erase_char), + "c" ((bottom-top-1)*video_num_columns>>1), + "D" (origin+video_size_row*bottom-4), + "S" (origin+video_size_row*(bottom-1)-4) + ); + } + else /* Not EGA/VGA */ + { + __asm__("std\n\t" + "rep\n\t" + "movsl\n\t" + "addl $2,%%edi\n\t" /* %edi has been decremented by 4 */ + "movl video_num_columns,%%ecx\n\t" + "rep\n\t" + "stosw" + ::"a" (video_erase_char), + "c" ((bottom-top-1)*video_num_columns>>1), + "D" (origin+video_size_row*bottom-4), + "S" (origin+video_size_row*(bottom-1)-4) + ); + } +} + +static void lf(void) +{ + if (y+1top) { + y--; + pos -= video_size_row; + return; + } + scrdown(); +} + +static void cr(void) +{ + pos -= x<<1; + x=0; +} + +static void del(void) +{ + if (x) { + pos -= 2; + x--; + *(unsigned short *)pos = video_erase_char; + } +} + +static void csi_J(int par) +{ + long count __asm__("cx"); + long start __asm__("di"); + + switch (par) { + case 0: /* erase from cursor to end of display */ + count = (scr_end-pos)>>1; + start = pos; + break; + case 1: /* erase from start to cursor */ + count = (pos-origin)>>1; + start = origin; + break; + case 2: /* erase whole display */ + count = video_num_columns * video_num_lines; + start = origin; + break; + default: + return; + } + __asm__("cld\n\t" + "rep\n\t" + "stosw\n\t" + ::"c" (count), + "D" (start),"a" (video_erase_char) + ); +} + +static void csi_K(int par) +{ + long count __asm__("cx"); + long start __asm__("di"); + + switch (par) { + case 0: /* erase from cursor to end of line */ + if (x>=video_num_columns) + return; + count = video_num_columns-x; + start = pos; + break; + case 1: /* erase from start of line to cursor */ + start = pos - (x<<1); + count = (x>9), video_port_val); + outb_p(15, video_port_reg); + outb_p(0xff&((pos-video_mem_start)>>1), video_port_val); + sti(); +} + +static void respond(struct tty_struct * tty) +{ + char * p = RESPONSE; + + cli(); + while (*p) { + PUTCH(*p,tty->read_q); + p++; + } + sti(); + copy_to_cooked(tty); +} + +static void insert_char(void) +{ + int i=x; + unsigned short tmp, old = video_erase_char; + unsigned short * p = (unsigned short *) pos; + + while (i++=video_num_columns) + return; + i = x; + while (++i < video_num_columns) { + *p = *(p+1); + p++; + } + *p = video_erase_char; +} + +static void delete_line(void) +{ + int oldtop,oldbottom; + + oldtop=top; + oldbottom=bottom; + top=y; + bottom = video_num_lines; + scrup(); + top=oldtop; + bottom=oldbottom; +} + +static void csi_at(unsigned int nr) +{ + if (nr > video_num_columns) + nr = video_num_columns; + else if (!nr) + nr = 1; + while (nr--) + insert_char(); +} + +static void csi_L(unsigned int nr) +{ + if (nr > video_num_lines) + nr = video_num_lines; + else if (!nr) + nr = 1; + while (nr--) + insert_line(); +} + +static void csi_P(unsigned int nr) +{ + if (nr > video_num_columns) + nr = video_num_columns; + else if (!nr) + nr = 1; + while (nr--) + delete_char(); +} + +static void csi_M(unsigned int nr) +{ + if (nr > video_num_lines) + nr = video_num_lines; + else if (!nr) + nr=1; + while (nr--) + delete_line(); +} + +static int saved_x=0; +static int saved_y=0; + +static void save_cur(void) +{ + saved_x=x; + saved_y=y; +} + +static void restore_cur(void) +{ + gotoxy(saved_x, saved_y); +} + +void con_write(struct tty_struct * tty) +{ + int nr; + char c; + + nr = CHARS(tty->write_q); + while (nr--) { + GETCH(tty->write_q,c); + switch(state) { + case 0: + if (c>31 && c<127) { + if (x>=video_num_columns) { + x -= video_num_columns; + pos -= video_size_row; + lf(); + } + __asm__("movb attr,%%ah\n\t" + "movw %%ax,%1\n\t" + ::"a" (c),"m" (*(short *)pos) + ); + pos += 2; + x++; + } else if (c==27) + state=1; + else if (c==10 || c==11 || c==12) + lf(); + else if (c==13) + cr(); + else if (c==ERASE_CHAR(tty)) + del(); + else if (c==8) { + if (x) { + x--; + pos -= 2; + } + } else if (c==9) { + c=8-(x&7); + x += c; + pos += c<<1; + if (x>video_num_columns) { + x -= video_num_columns; + pos -= video_size_row; + lf(); + } + c=9; + } else if (c==7) + sysbeep(); + break; + case 1: + state=0; + if (c=='[') + state=2; + else if (c=='E') + gotoxy(0,y+1); + else if (c=='M') + ri(); + else if (c=='D') + lf(); + else if (c=='Z') + respond(tty); + else if (x=='7') + save_cur(); + else if (x=='8') + restore_cur(); + break; + case 2: + for(npar=0;npar='0' && c<='9') { + par[npar]=10*par[npar]+c-'0'; + break; + } else state=4; + case 4: + state=0; + switch(c) { + case 'G': case '`': + if (par[0]) par[0]--; + gotoxy(par[0],y); + break; + case 'A': + if (!par[0]) par[0]++; + gotoxy(x,y-par[0]); + break; + case 'B': case 'e': + if (!par[0]) par[0]++; + gotoxy(x,y+par[0]); + break; + case 'C': case 'a': + if (!par[0]) par[0]++; + gotoxy(x+par[0],y); + break; + case 'D': + if (!par[0]) par[0]++; + gotoxy(x-par[0],y); + break; + case 'E': + if (!par[0]) par[0]++; + gotoxy(0,y+par[0]); + break; + case 'F': + if (!par[0]) par[0]++; + gotoxy(0,y-par[0]); + break; + case 'd': + if (par[0]) par[0]--; + gotoxy(x,par[0]); + break; + case 'H': case 'f': + if (par[0]) par[0]--; + if (par[1]) par[1]--; + gotoxy(par[1],par[0]); + break; + case 'J': + csi_J(par[0]); + break; + case 'K': + csi_K(par[0]); + break; + case 'L': + csi_L(par[0]); + break; + case 'M': + csi_M(par[0]); + break; + case 'P': + csi_P(par[0]); + break; + case '@': + csi_at(par[0]); + break; + case 'm': + csi_m(); + break; + case 'r': + if (par[0]) par[0]--; + if (!par[1]) par[1] = video_num_lines; + if (par[0] < par[1] && + par[1] <= video_num_lines) { + top=par[0]; + bottom=par[1]; + } + break; + case 's': + save_cur(); + break; + case 'u': + restore_cur(); + break; + } + } + } + set_cursor(); +} + +/* + * void con_init(void); + * + * This routine initalizes console interrupts, and does nothing + * else. If you want the screen to clear, call tty_write with + * the appropriate escape-sequece. + * + * Reads the information preserved by setup.s to determine the current display + * type and sets everything accordingly. + */ +void con_init(void) +{ + register unsigned char a; + char *display_desc = "????"; + char *display_ptr; + + video_num_columns = ORIG_VIDEO_COLS; + video_size_row = video_num_columns * 2; + video_num_lines = ORIG_VIDEO_LINES; + video_page = ORIG_VIDEO_PAGE; + video_erase_char = 0x0720; + + if (ORIG_VIDEO_MODE == 7) /* Is this a monochrome display? */ + { + video_mem_start = 0xb0000; + video_port_reg = 0x3b4; + video_port_val = 0x3b5; + if ((ORIG_VIDEO_EGA_BX & 0xff) != 0x10) + { + video_type = VIDEO_TYPE_EGAM; + video_mem_end = 0xb8000; + display_desc = "EGAm"; + } + else + { + video_type = VIDEO_TYPE_MDA; + video_mem_end = 0xb2000; + display_desc = "*MDA"; + } + } + else /* If not, it is color. */ + { + video_mem_start = 0xb8000; + video_port_reg = 0x3d4; + video_port_val = 0x3d5; + if ((ORIG_VIDEO_EGA_BX & 0xff) != 0x10) + { + video_type = VIDEO_TYPE_EGAC; + video_mem_end = 0xbc000; + display_desc = "EGAc"; + } + else + { + video_type = VIDEO_TYPE_CGA; + video_mem_end = 0xba000; + display_desc = "*CGA"; + } + } + + /* Let the user known what kind of display driver we are using */ + + display_ptr = ((char *)video_mem_start) + video_size_row - 8; + while (*display_desc) + { + *display_ptr++ = *display_desc++; + display_ptr++; + } + + /* Initialize the variables used for scrolling (mostly EGA/VGA) */ + + origin = video_mem_start; + scr_end = video_mem_start + video_num_lines * video_size_row; + top = 0; + bottom = video_num_lines; + + gotoxy(ORIG_X,ORIG_Y); + set_trap_gate(0x21,&keyboard_interrupt); + outb_p(inb_p(0x21)&0xfd,0x21); + a=inb_p(0x61); + outb_p(a|0x80,0x61); + outb(a,0x61); +} +/* from bsd-net-2: */ + +void sysbeepstop(void) +{ + /* disable counter 2 */ + outb(inb_p(0x61)&0xFC, 0x61); +} + +int beepcount = 0; + +static void sysbeep(void) +{ + /* enable counter 2 */ + outb_p(inb_p(0x61)|3, 0x61); + /* set command for counter 2, 2 byte write */ + outb_p(0xB6, 0x43); + /* send 0x637 for 750 HZ */ + outb_p(0x37, 0x42); + outb(0x06, 0x42); + /* 1/8 second */ + beepcount = HZ/8; +} diff --git a/os/os/linux/kernel/chr_drv/console.o b/os/os/linux/kernel/chr_drv/console.o new file mode 100644 index 0000000..cdb09cf Binary files /dev/null and b/os/os/linux/kernel/chr_drv/console.o differ diff --git a/os/os/linux/kernel/chr_drv/keyboard.2.o b/os/os/linux/kernel/chr_drv/keyboard.2.o new file mode 100644 index 0000000..031174b Binary files /dev/null and b/os/os/linux/kernel/chr_drv/keyboard.2.o differ diff --git a/os/os/linux/kernel/chr_drv/keyboard.2.s b/os/os/linux/kernel/chr_drv/keyboard.2.s new file mode 100644 index 0000000..a348410 --- /dev/null +++ b/os/os/linux/kernel/chr_drv/keyboard.2.s @@ -0,0 +1,466 @@ +# 1 "keyboard.S" +# 1 "" +# 1 "" +# 1 "keyboard.S" + + + + + + + + + + + + + +# 1 "../../include/linux/config.h" 1 + + + + + + + + + + + + + + + + + + + + + +# 36 "../../include/linux/config.h" + +# 47 "../../include/linux/config.h" + +# 14 "keyboard.S" 2 + +.text +.globl keyboard_interrupt + + + + +size = 1024 + +head = 4 +tail = 8 +proc_list = 12 +buf = 16 + +mode: .byte 0 +leds: .byte 2 +e0: .byte 0 + + + + + + +keyboard_interrupt: + pushl %eax + pushl %ebx + pushl %ecx + pushl %edx + push %ds + push %es + movl $0x10,%eax + mov %ax,%ds + mov %ax,%es + xor %al,%al + inb $0x60,%al + cmpb $0xe0,%al + je set_e0 + cmpb $0xe1,%al + je set_e1 + call key_table(,%eax,4) + movb $0,e0 +e0_e1: inb $0x61,%al + jmp 1f +1: jmp 1f +1: orb $0x80,%al + jmp 1f +1: jmp 1f +1: outb %al,$0x61 + jmp 1f +1: jmp 1f +1: andb $0x7F,%al + outb %al,$0x61 + movb $0x20,%al + outb %al,$0x20 + pushl $0 + call do_tty_interrupt + addl $4,%esp + pop %es + pop %ds + popl %edx + popl %ecx + popl %ebx + popl %eax + iret +set_e0: movb $1,e0 + jmp e0_e1 +set_e1: movb $2,e0 + jmp e0_e1 + + + + + + +put_queue: + pushl %ecx + pushl %edx + movl table_list,%edx # read-queue for console + movl head(%edx),%ecx +1: movb %al,buf(%edx,%ecx) + incl %ecx + andl $size-1,%ecx + cmpl tail(%edx),%ecx # buffer full - discard everything + je 3f + shrdl $8,%ebx,%eax + je 2f + shrl $8,%ebx + jmp 1b +2: movl %ecx,head(%edx) + movl proc_list(%edx),%ecx + testl %ecx,%ecx + je 3f + movl $0,(%ecx) +3: popl %edx + popl %ecx + ret + +ctrl: movb $0x04,%al + jmp 1f +alt: movb $0x10,%al +1: cmpb $0,e0 + je 2f + addb %al,%al +2: orb %al,mode + ret +unctrl: movb $0x04,%al + jmp 1f +unalt: movb $0x10,%al +1: cmpb $0,e0 + je 2f + addb %al,%al +2: notb %al + andb %al,mode + ret + +lshift: + orb $0x01,mode + ret +unlshift: + andb $0xfe,mode + ret +rshift: + orb $0x02,mode + ret +unrshift: + andb $0xfd,mode + ret + +caps: testb $0x80,mode + jne 1f + xorb $4,leds + xorb $0x40,mode + orb $0x80,mode +set_leds: + call kb_wait + movb $0xed,%al + outb %al,$0x60 + call kb_wait + movb leds,%al + outb %al,$0x60 + ret +uncaps: andb $0x7f,mode + ret +scroll: + xorb $1,leds + jmp set_leds +num: xorb $2,leds + jmp set_leds + + + + + +cursor: + subb $0x47,%al + jb 1f + cmpb $12,%al + ja 1f + jne cur2 + testb $0x0c,mode + je cur2 + testb $0x30,mode + jne reboot +cur2: cmpb $0x01,e0 + je cur + testb $0x02,leds + je cur + testb $0x03,mode + jne cur + xorl %ebx,%ebx + movb num_table(%eax),%al + jmp put_queue +1: ret + +cur: movb cur_table(%eax),%al + cmpb $'9,%al + ja ok_cur + movb $'~,%ah +ok_cur: shll $16,%eax + movw $0x5b1b,%ax + xorl %ebx,%ebx + jmp put_queue + + + + + +num_table: + .ascii "789 456 1230," + +cur_table: + .ascii "HA5 DGC YB623" + + + + +func: + pushl %eax + pushl %ecx + pushl %edx + call show_stat + popl %edx + popl %ecx + popl %eax + subb $0x3B,%al + jb end_func + cmpb $9,%al + jbe ok_func + subb $18,%al + cmpb $10,%al + jb end_func + cmpb $11,%al + ja end_func +ok_func: + cmpl $4,%ecx + jl end_func + movl func_table(,%eax,4),%eax + xorl %ebx,%ebx + jmp put_queue +end_func: + ret + + + + +func_table: + .long 0x415b5b1b,0x425b5b1b,0x435b5b1b,0x445b5b1b + .long 0x455b5b1b,0x465b5b1b,0x475b5b1b,0x485b5b1b + .long 0x495b5b1b,0x4a5b5b1b,0x4b5b5b1b,0x4c5b5b1b + +# 294 "keyboard.S" + +key_map: + .byte 0,27 + .ascii "1234567890-=" + .byte 127,9 + .ascii "qwertyuiop[]" + .byte 13,0 + .ascii "asdfghjkl;'" + .byte '`,0 + .ascii "\\zxcvbnm,./" + .byte 0,'*,0,32 /* 36-39 */ + .fill 16,1,0 + .byte '-,0,0,0,'+ + .byte 0,0,0,0,0,0,0 + .byte '< + .fill 10,1,0 + + +shift_map: + .byte 0,27 + .ascii "!@#$%^&*()_+" + .byte 127,9 + .ascii "QWERTYUIOP{}" + .byte 13,0 + .ascii "ASDFGHJKL:\"" + .byte '~,0 + .ascii "|ZXCVBNM<>?" + .byte 0,'*,0,32 /* 36-39 */ + .fill 16,1,0 + .byte '-,0,0,0,'+ + .byte 0,0,0,0,0,0,0 + .byte '> + .fill 10,1,0 + +alt_map: + .byte 0,0 + .ascii "\0@\0$\0\0{[]}\\\0" + .byte 0,0 + .byte 0,0,0,0,0,0,0,0,0,0,0 + .byte '~,13,0 + .byte 0,0,0,0,0,0,0,0,0,0,0 + .byte 0,0 + .byte 0,0,0,0,0,0,0,0,0,0,0 + .byte 0,0,0,0 + .fill 16,1,0 + .byte 0,0,0,0,0 + .byte 0,0,0,0,0,0,0 + .byte '| + .fill 10,1,0 + +# 449 "keyboard.S" + + + + +do_self: + lea alt_map,%ebx + testb $0x20,mode + jne 1f + lea shift_map,%ebx + testb $0x03,mode + jne 1f + lea key_map,%ebx +1: movb (%ebx,%eax),%al + orb %al,%al + je none + testb $0x4c,mode + je 2f + cmpb $'a,%al + jb 2f + cmpb $'},%al + ja 2f + subb $32,%al +2: testb $0x0c,mode + je 3f + cmpb $64,%al + jb 3f + cmpb $64+32,%al + jae 3f + subb $64,%al +3: testb $0x10,mode + je 4f + orb $0x80,%al +4: andl $0xff,%eax + xorl %ebx,%ebx + call put_queue +none: ret + + + + + + +minus: cmpb $1,e0 + jne do_self + movl $'/,%eax + xorl %ebx,%ebx + jmp put_queue + + + + + + +key_table: + .long none,do_self,do_self,do_self + .long do_self,do_self,do_self,do_self + .long do_self,do_self,do_self,do_self + .long do_self,do_self,do_self,do_self + .long do_self,do_self,do_self,do_self + .long do_self,do_self,do_self,do_self + .long do_self,do_self,do_self,do_self + .long do_self,ctrl,do_self,do_self + .long do_self,do_self,do_self,do_self + .long do_self,do_self,do_self,do_self + .long do_self,do_self,lshift,do_self + .long do_self,do_self,do_self,do_self + .long do_self,do_self,do_self,do_self + .long do_self,minus,rshift,do_self + .long alt,do_self,caps,func + .long func,func,func,func + .long func,func,func,func + .long func,num,scroll,cursor + .long cursor,cursor,do_self,cursor + .long cursor,cursor,do_self,cursor + .long cursor,cursor,cursor,cursor + .long none,none,do_self,func + .long func,none,none,none + .long none,none,none,none + .long none,none,none,none + .long none,none,none,none + .long none,none,none,none + .long none,none,none,none + .long none,none,none,none + .long none,none,none,none + .long none,none,none,none + .long none,none,none,none + .long none,none,none,none + .long none,none,none,none + .long none,none,none,none + .long none,none,none,none + .long none,none,none,none + .long none,none,none,none + .long none,none,none,none + .long none,unctrl,none,none + .long none,none,none,none + .long none,none,none,none + .long none,none,unlshift,none + .long none,none,none,none + .long none,none,none,none + .long none,none,unrshift,none + .long unalt,none,uncaps,none + .long none,none,none,none + .long none,none,none,none + .long none,none,none,none + .long none,none,none,none + .long none,none,none,none + .long none,none,none,none + .long none,none,none,none + .long none,none,none,none + .long none,none,none,none + .long none,none,none,none + .long none,none,none,none + .long none,none,none,none + .long none,none,none,none + .long none,none,none,none + .long none,none,none,none + .long none,none,none,none + .long none,none,none,none + + + + + +kb_wait: + pushl %eax +1: inb $0x64,%al + testb $0x02,%al + jne 1b + popl %eax + ret + + + + +reboot: + call kb_wait + movw $0x1234,0x472 + movb $0xfc,%al + outb %al,$0x64 +die: jmp die diff --git a/os/os/linux/kernel/chr_drv/keyboard.S b/os/os/linux/kernel/chr_drv/keyboard.S new file mode 100644 index 0000000..25210b4 --- /dev/null +++ b/os/os/linux/kernel/chr_drv/keyboard.S @@ -0,0 +1,588 @@ +/* + * linux/kernel/keyboard.S + * + * (C) 1991 Linus Torvalds + */ + +/* + * Thanks to Alfred Leung for US keyboard patches + * Wolfgang Thiel for German keyboard patches + * Marc Corsini for the French keyboard + */ + +#include + +.text +.globl keyboard_interrupt + +/* + * these are for the keyboard read functions + */ +size = 1024 /* must be a power of two ! And MUST be the same + as in tty_io.c !!!! */ +head = 4 +tail = 8 +proc_list = 12 +buf = 16 + +mode: .byte 0 /* caps, alt, ctrl and shift mode */ +leds: .byte 2 /* num-lock, caps, scroll-lock mode (nom-lock on) */ +e0: .byte 0 + +/* + * con_int is the real interrupt routine that reads the + * keyboard scan-code and converts it into the appropriate + * ascii character(s). + */ +keyboard_interrupt: + pushl %eax + pushl %ebx + pushl %ecx + pushl %edx + push %ds + push %es + movl $0x10,%eax + mov %ax,%ds + mov %ax,%es + xor %al,%al /* %eax is scan code */ + inb $0x60,%al + cmpb $0xe0,%al + je set_e0 + cmpb $0xe1,%al + je set_e1 + call key_table(,%eax,4) + movb $0,e0 +e0_e1: inb $0x61,%al + jmp 1f +1: jmp 1f +1: orb $0x80,%al + jmp 1f +1: jmp 1f +1: outb %al,$0x61 + jmp 1f +1: jmp 1f +1: andb $0x7F,%al + outb %al,$0x61 + movb $0x20,%al + outb %al,$0x20 + pushl $0 + call do_tty_interrupt + addl $4,%esp + pop %es + pop %ds + popl %edx + popl %ecx + popl %ebx + popl %eax + iret +set_e0: movb $1,e0 + jmp e0_e1 +set_e1: movb $2,e0 + jmp e0_e1 + +/* + * This routine fills the buffer with max 8 bytes, taken from + * %ebx:%eax. (%edx is high). The bytes are written in the + * order %al,%ah,%eal,%eah,%bl,%bh ... until %eax is zero. + */ +put_queue: + pushl %ecx + pushl %edx + movl table_list,%edx # read-queue for console + movl head(%edx),%ecx +1: movb %al,buf(%edx,%ecx) + incl %ecx + andl $size-1,%ecx + cmpl tail(%edx),%ecx # buffer full - discard everything + je 3f + shrdl $8,%ebx,%eax + je 2f + shrl $8,%ebx + jmp 1b +2: movl %ecx,head(%edx) + movl proc_list(%edx),%ecx + testl %ecx,%ecx + je 3f + movl $0,(%ecx) +3: popl %edx + popl %ecx + ret + +ctrl: movb $0x04,%al + jmp 1f +alt: movb $0x10,%al +1: cmpb $0,e0 + je 2f + addb %al,%al +2: orb %al,mode + ret +unctrl: movb $0x04,%al + jmp 1f +unalt: movb $0x10,%al +1: cmpb $0,e0 + je 2f + addb %al,%al +2: notb %al + andb %al,mode + ret + +lshift: + orb $0x01,mode + ret +unlshift: + andb $0xfe,mode + ret +rshift: + orb $0x02,mode + ret +unrshift: + andb $0xfd,mode + ret + +caps: testb $0x80,mode + jne 1f + xorb $4,leds + xorb $0x40,mode + orb $0x80,mode +set_leds: + call kb_wait + movb $0xed,%al /* set leds command */ + outb %al,$0x60 + call kb_wait + movb leds,%al + outb %al,$0x60 + ret +uncaps: andb $0x7f,mode + ret +scroll: + xorb $1,leds + jmp set_leds +num: xorb $2,leds + jmp set_leds + +/* + * curosr-key/numeric keypad cursor keys are handled here. + * checking for numeric keypad etc. + */ +cursor: + subb $0x47,%al + jb 1f + cmpb $12,%al + ja 1f + jne cur2 /* check for ctrl-alt-del */ + testb $0x0c,mode + je cur2 + testb $0x30,mode + jne reboot +cur2: cmpb $0x01,e0 /* e0 forces cursor movement */ + je cur + testb $0x02,leds /* not num-lock forces cursor */ + je cur + testb $0x03,mode /* shift forces cursor */ + jne cur + xorl %ebx,%ebx + movb num_table(%eax),%al + jmp put_queue +1: ret + +cur: movb cur_table(%eax),%al + cmpb $'9,%al + ja ok_cur + movb $'~,%ah +ok_cur: shll $16,%eax + movw $0x5b1b,%ax + xorl %ebx,%ebx + jmp put_queue + +#if defined(KBD_FR) +num_table: + .ascii "789 456 1230." +#else +num_table: + .ascii "789 456 1230," +#endif +cur_table: + .ascii "HA5 DGC YB623" + +/* + * this routine handles function keys + */ +func: + pushl %eax + pushl %ecx + pushl %edx + call show_stat + popl %edx + popl %ecx + popl %eax + subb $0x3B,%al + jb end_func + cmpb $9,%al + jbe ok_func + subb $18,%al + cmpb $10,%al + jb end_func + cmpb $11,%al + ja end_func +ok_func: + cmpl $4,%ecx /* check that there is enough room */ + jl end_func + movl func_table(,%eax,4),%eax + xorl %ebx,%ebx + jmp put_queue +end_func: + ret + +/* + * function keys send F1:'esc [ [ A' F2:'esc [ [ B' etc. + */ +func_table: + .long 0x415b5b1b,0x425b5b1b,0x435b5b1b,0x445b5b1b + .long 0x455b5b1b,0x465b5b1b,0x475b5b1b,0x485b5b1b + .long 0x495b5b1b,0x4a5b5b1b,0x4b5b5b1b,0x4c5b5b1b + +#if defined(KBD_FINNISH) +key_map: + .byte 0,27 + .ascii "1234567890+'" + .byte 127,9 + .ascii "qwertyuiop}" + .byte 0,13,0 + .ascii "asdfghjkl|{" + .byte 0,0 + .ascii "'zxcvbnm,.-" + .byte 0,'*,0,32 /* 36-39 */ + .fill 16,1,0 /* 3A-49 */ + .byte '-,0,0,0,'+ /* 4A-4E */ + .byte 0,0,0,0,0,0,0 /* 4F-55 */ + .byte '< + .fill 10,1,0 + +shift_map: + .byte 0,27 + .ascii "!\"#$%&/()=?`" + .byte 127,9 + .ascii "QWERTYUIOP]^" + .byte 13,0 + .ascii "ASDFGHJKL\\[" + .byte 0,0 + .ascii "*ZXCVBNM;:_" + .byte 0,'*,0,32 /* 36-39 */ + .fill 16,1,0 /* 3A-49 */ + .byte '-,0,0,0,'+ /* 4A-4E */ + .byte 0,0,0,0,0,0,0 /* 4F-55 */ + .byte '> + .fill 10,1,0 + +alt_map: + .byte 0,0 + .ascii "\0@\0$\0\0{[]}\\\0" + .byte 0,0 + .byte 0,0,0,0,0,0,0,0,0,0,0 + .byte '~,13,0 + .byte 0,0,0,0,0,0,0,0,0,0,0 + .byte 0,0 + .byte 0,0,0,0,0,0,0,0,0,0,0 + .byte 0,0,0,0 /* 36-39 */ + .fill 16,1,0 /* 3A-49 */ + .byte 0,0,0,0,0 /* 4A-4E */ + .byte 0,0,0,0,0,0,0 /* 4F-55 */ + .byte '| + .fill 10,1,0 + +#elif defined(KBD_US) + +key_map: + .byte 0,27 + .ascii "1234567890-=" + .byte 127,9 + .ascii "qwertyuiop[]" + .byte 13,0 + .ascii "asdfghjkl;'" + .byte '`,0 + .ascii "\\zxcvbnm,./" + .byte 0,'*,0,32 /* 36-39 */ + .fill 16,1,0 /* 3A-49 */ + .byte '-,0,0,0,'+ /* 4A-4E */ + .byte 0,0,0,0,0,0,0 /* 4F-55 */ + .byte '< + .fill 10,1,0 + + +shift_map: + .byte 0,27 + .ascii "!@#$%^&*()_+" + .byte 127,9 + .ascii "QWERTYUIOP{}" + .byte 13,0 + .ascii "ASDFGHJKL:\"" + .byte '~,0 + .ascii "|ZXCVBNM<>?" + .byte 0,'*,0,32 /* 36-39 */ + .fill 16,1,0 /* 3A-49 */ + .byte '-,0,0,0,'+ /* 4A-4E */ + .byte 0,0,0,0,0,0,0 /* 4F-55 */ + .byte '> + .fill 10,1,0 + +alt_map: + .byte 0,0 + .ascii "\0@\0$\0\0{[]}\\\0" + .byte 0,0 + .byte 0,0,0,0,0,0,0,0,0,0,0 + .byte '~,13,0 + .byte 0,0,0,0,0,0,0,0,0,0,0 + .byte 0,0 + .byte 0,0,0,0,0,0,0,0,0,0,0 + .byte 0,0,0,0 /* 36-39 */ + .fill 16,1,0 /* 3A-49 */ + .byte 0,0,0,0,0 /* 4A-4E */ + .byte 0,0,0,0,0,0,0 /* 4F-55 */ + .byte '| + .fill 10,1,0 + +#elif defined(KBD_GR) + +key_map: + .byte 0,27 + .ascii "1234567890\\'" + .byte 127,9 + .ascii "qwertzuiop@+" + .byte 13,0 + .ascii "asdfghjkl[]^" + .byte 0,'# + .ascii "yxcvbnm,.-" + .byte 0,'*,0,32 /* 36-39 */ + .fill 16,1,0 /* 3A-49 */ + .byte '-,0,0,0,'+ /* 4A-4E */ + .byte 0,0,0,0,0,0,0 /* 4F-55 */ + .byte '< + .fill 10,1,0 + + +shift_map: + .byte 0,27 + .ascii "!\"#$%&/()=?`" + .byte 127,9 + .ascii "QWERTZUIOP\\*" + .byte 13,0 + .ascii "ASDFGHJKL{}~" + .byte 0,'' + .ascii "YXCVBNM;:_" + .byte 0,'*,0,32 /* 36-39 */ + .fill 16,1,0 /* 3A-49 */ + .byte '-,0,0,0,'+ /* 4A-4E */ + .byte 0,0,0,0,0,0,0 /* 4F-55 */ + .byte '> + .fill 10,1,0 + +alt_map: + .byte 0,0 + .ascii "\0@\0$\0\0{[]}\\\0" + .byte 0,0 + .byte '@,0,0,0,0,0,0,0,0,0,0 + .byte '~,13,0 + .byte 0,0,0,0,0,0,0,0,0,0,0 + .byte 0,0 + .byte 0,0,0,0,0,0,0,0,0,0,0 + .byte 0,0,0,0 /* 36-39 */ + .fill 16,1,0 /* 3A-49 */ + .byte 0,0,0,0,0 /* 4A-4E */ + .byte 0,0,0,0,0,0,0 /* 4F-55 */ + .byte '| + .fill 10,1,0 + + +#elif defined(KBD_FR) + +key_map: + .byte 0,27 + .ascii "&{\"'(-}_/@)=" + .byte 127,9 + .ascii "azertyuiop^$" + .byte 13,0 + .ascii "qsdfghjklm|" + .byte '`,0,42 /* coin sup gauche, don't know, [*|mu] */ + .ascii "wxcvbn,;:!" + .byte 0,'*,0,32 /* 36-39 */ + .fill 16,1,0 /* 3A-49 */ + .byte '-,0,0,0,'+ /* 4A-4E */ + .byte 0,0,0,0,0,0,0 /* 4F-55 */ + .byte '< + .fill 10,1,0 + +shift_map: + .byte 0,27 + .ascii "1234567890]+" + .byte 127,9 + .ascii "AZERTYUIOP<>" + .byte 13,0 + .ascii "QSDFGHJKLM%" + .byte '~,0,'# + .ascii "WXCVBN?./\\" + .byte 0,'*,0,32 /* 36-39 */ + .fill 16,1,0 /* 3A-49 */ + .byte '-,0,0,0,'+ /* 4A-4E */ + .byte 0,0,0,0,0,0,0 /* 4F-55 */ + .byte '> + .fill 10,1,0 + +alt_map: + .byte 0,0 + .ascii "\0~#{[|`\\^@]}" + .byte 0,0 + .byte '@,0,0,0,0,0,0,0,0,0,0 + .byte '~,13,0 + .byte 0,0,0,0,0,0,0,0,0,0,0 + .byte 0,0 + .byte 0,0,0,0,0,0,0,0,0,0,0 + .byte 0,0,0,0 /* 36-39 */ + .fill 16,1,0 /* 3A-49 */ + .byte 0,0,0,0,0 /* 4A-4E */ + .byte 0,0,0,0,0,0,0 /* 4F-55 */ + .byte '| + .fill 10,1,0 + +#else +#error "KBD-type not defined" +#endif +/* + * do_self handles "normal" keys, ie keys that don't change meaning + * and which have just one character returns. + */ +do_self: + lea alt_map,%ebx + testb $0x20,mode /* alt-gr */ + jne 1f + lea shift_map,%ebx + testb $0x03,mode + jne 1f + lea key_map,%ebx +1: movb (%ebx,%eax),%al + orb %al,%al + je none + testb $0x4c,mode /* ctrl or caps */ + je 2f + cmpb $'a,%al + jb 2f + cmpb $'},%al + ja 2f + subb $32,%al +2: testb $0x0c,mode /* ctrl */ + je 3f + cmpb $64,%al + jb 3f + cmpb $64+32,%al + jae 3f + subb $64,%al +3: testb $0x10,mode /* left alt */ + je 4f + orb $0x80,%al +4: andl $0xff,%eax + xorl %ebx,%ebx + call put_queue +none: ret + +/* + * minus has a routine of it's own, as a 'E0h' before + * the scan code for minus means that the numeric keypad + * slash was pushed. + */ +minus: cmpb $1,e0 + jne do_self + movl $'/,%eax + xorl %ebx,%ebx + jmp put_queue + +/* + * This table decides which routine to call when a scan-code has been + * gotten. Most routines just call do_self, or none, depending if + * they are make or break. + */ +key_table: + .long none,do_self,do_self,do_self /* 00-03 s0 esc 1 2 */ + .long do_self,do_self,do_self,do_self /* 04-07 3 4 5 6 */ + .long do_self,do_self,do_self,do_self /* 08-0B 7 8 9 0 */ + .long do_self,do_self,do_self,do_self /* 0C-0F + ' bs tab */ + .long do_self,do_self,do_self,do_self /* 10-13 q w e r */ + .long do_self,do_self,do_self,do_self /* 14-17 t y u i */ + .long do_self,do_self,do_self,do_self /* 18-1B o p } ^ */ + .long do_self,ctrl,do_self,do_self /* 1C-1F enter ctrl a s */ + .long do_self,do_self,do_self,do_self /* 20-23 d f g h */ + .long do_self,do_self,do_self,do_self /* 24-27 j k l | */ + .long do_self,do_self,lshift,do_self /* 28-2B { para lshift , */ + .long do_self,do_self,do_self,do_self /* 2C-2F z x c v */ + .long do_self,do_self,do_self,do_self /* 30-33 b n m , */ + .long do_self,minus,rshift,do_self /* 34-37 . - rshift * */ + .long alt,do_self,caps,func /* 38-3B alt sp caps f1 */ + .long func,func,func,func /* 3C-3F f2 f3 f4 f5 */ + .long func,func,func,func /* 40-43 f6 f7 f8 f9 */ + .long func,num,scroll,cursor /* 44-47 f10 num scr home */ + .long cursor,cursor,do_self,cursor /* 48-4B up pgup - left */ + .long cursor,cursor,do_self,cursor /* 4C-4F n5 right + end */ + .long cursor,cursor,cursor,cursor /* 50-53 dn pgdn ins del */ + .long none,none,do_self,func /* 54-57 sysreq ? < f11 */ + .long func,none,none,none /* 58-5B f12 ? ? ? */ + .long none,none,none,none /* 5C-5F ? ? ? ? */ + .long none,none,none,none /* 60-63 ? ? ? ? */ + .long none,none,none,none /* 64-67 ? ? ? ? */ + .long none,none,none,none /* 68-6B ? ? ? ? */ + .long none,none,none,none /* 6C-6F ? ? ? ? */ + .long none,none,none,none /* 70-73 ? ? ? ? */ + .long none,none,none,none /* 74-77 ? ? ? ? */ + .long none,none,none,none /* 78-7B ? ? ? ? */ + .long none,none,none,none /* 7C-7F ? ? ? ? */ + .long none,none,none,none /* 80-83 ? br br br */ + .long none,none,none,none /* 84-87 br br br br */ + .long none,none,none,none /* 88-8B br br br br */ + .long none,none,none,none /* 8C-8F br br br br */ + .long none,none,none,none /* 90-93 br br br br */ + .long none,none,none,none /* 94-97 br br br br */ + .long none,none,none,none /* 98-9B br br br br */ + .long none,unctrl,none,none /* 9C-9F br unctrl br br */ + .long none,none,none,none /* A0-A3 br br br br */ + .long none,none,none,none /* A4-A7 br br br br */ + .long none,none,unlshift,none /* A8-AB br br unlshift br */ + .long none,none,none,none /* AC-AF br br br br */ + .long none,none,none,none /* B0-B3 br br br br */ + .long none,none,unrshift,none /* B4-B7 br br unrshift br */ + .long unalt,none,uncaps,none /* B8-BB unalt br uncaps br */ + .long none,none,none,none /* BC-BF br br br br */ + .long none,none,none,none /* C0-C3 br br br br */ + .long none,none,none,none /* C4-C7 br br br br */ + .long none,none,none,none /* C8-CB br br br br */ + .long none,none,none,none /* CC-CF br br br br */ + .long none,none,none,none /* D0-D3 br br br br */ + .long none,none,none,none /* D4-D7 br br br br */ + .long none,none,none,none /* D8-DB br ? ? ? */ + .long none,none,none,none /* DC-DF ? ? ? ? */ + .long none,none,none,none /* E0-E3 e0 e1 ? ? */ + .long none,none,none,none /* E4-E7 ? ? ? ? */ + .long none,none,none,none /* E8-EB ? ? ? ? */ + .long none,none,none,none /* EC-EF ? ? ? ? */ + .long none,none,none,none /* F0-F3 ? ? ? ? */ + .long none,none,none,none /* F4-F7 ? ? ? ? */ + .long none,none,none,none /* F8-FB ? ? ? ? */ + .long none,none,none,none /* FC-FF ? ? ? ? */ + +/* + * kb_wait waits for the keyboard controller buffer to empty. + * there is no timeout - if the buffer doesn't empty, we hang. + */ +kb_wait: + pushl %eax +1: inb $0x64,%al + testb $0x02,%al + jne 1b + popl %eax + ret +/* + * This routine reboots the machine by asking the keyboard + * controller to pulse the reset-line low. + */ +reboot: + call kb_wait + movw $0x1234,0x472 /* don't do memory check */ + movb $0xfc,%al /* pulse reset and A20 low */ + outb %al,$0x64 +die: jmp die diff --git a/os/os/linux/kernel/chr_drv/rs_io.o b/os/os/linux/kernel/chr_drv/rs_io.o new file mode 100644 index 0000000..9d7d5b3 Binary files /dev/null and b/os/os/linux/kernel/chr_drv/rs_io.o differ diff --git a/os/os/linux/kernel/chr_drv/rs_io.s b/os/os/linux/kernel/chr_drv/rs_io.s new file mode 100644 index 0000000..ba1e55e --- /dev/null +++ b/os/os/linux/kernel/chr_drv/rs_io.s @@ -0,0 +1,147 @@ +/* + * linux/kernel/rs_io.s + * + * (C) 1991 Linus Torvalds + */ + +/* + * rs_io.s + * + * This module implements the rs232 io interrupts. + */ + +.text +.globl rs1_interrupt,rs2_interrupt + +size = 1024 /* must be power of two ! + and must match the value + in tty_io.c!!! */ + +/* these are the offsets into the read/write buffer structures */ +rs_addr = 0 +head = 4 +tail = 8 +proc_list = 12 +buf = 16 + +startup = 256 /* chars left in write queue when we restart it */ + +/* + * These are the actual interrupt routines. They look where + * the interrupt is coming from, and take appropriate action. + */ +.align 4 +rs1_interrupt: + pushl $table_list+8 + jmp rs_int +.align 4 +rs2_interrupt: + pushl $table_list+16 +rs_int: + pushl %edx + pushl %ecx + pushl %ebx + pushl %eax + push %es + push %ds /* as this is an interrupt, we cannot */ + pushl $0x10 /* know that bs is ok. Load it */ + pop %ds + pushl $0x10 + pop %es + movl 24(%esp),%edx + movl (%edx),%edx + movl rs_addr(%edx),%edx + addl $2,%edx /* interrupt ident. reg */ +rep_int: + xorl %eax,%eax + inb %dx,%al + testb $1,%al + jne end + cmpb $6,%al /* this shouldn't happen, but ... */ + ja end + movl 24(%esp),%ecx + pushl %edx + subl $2,%edx + call jmp_table(,%eax,2) /* NOTE! not *4, bit0 is 0 already */ + popl %edx + jmp rep_int +end: movb $0x20,%al + outb %al,$0x20 /* EOI */ + pop %ds + pop %es + popl %eax + popl %ebx + popl %ecx + popl %edx + addl $4,%esp # jump over _table_list entry + iret + +jmp_table: + .long modem_status,write_char,read_char,line_status + +.align 4 +modem_status: + addl $6,%edx /* clear intr by reading modem status reg */ + inb %dx,%al + ret + +.align 4 +line_status: + addl $5,%edx /* clear intr by reading line status reg. */ + inb %dx,%al + ret + +.align 4 +read_char: + inb %dx,%al + movl %ecx,%edx + subl $table_list,%edx + shrl $3,%edx + movl (%ecx),%ecx # read-queue + movl head(%ecx),%ebx + movb %al,buf(%ecx,%ebx) + incl %ebx + andl $size-1,%ebx + cmpl tail(%ecx),%ebx + je 1f + movl %ebx,head(%ecx) +1: pushl %edx + call do_tty_interrupt + addl $4,%esp + ret + +.align 4 +write_char: + movl 4(%ecx),%ecx # write-queue + movl head(%ecx),%ebx + subl tail(%ecx),%ebx + andl $size-1,%ebx # nr chars in queue + je write_buffer_empty + cmpl $startup,%ebx + ja 1f + movl proc_list(%ecx),%ebx # wake up sleeping process + testl %ebx,%ebx # is there any? + je 1f + movl $0,(%ebx) +1: movl tail(%ecx),%ebx + movb buf(%ecx,%ebx),%al + outb %al,%dx + incl %ebx + andl $size-1,%ebx + movl %ebx,tail(%ecx) + cmpl head(%ecx),%ebx + je write_buffer_empty + ret +.align 4 +write_buffer_empty: + movl proc_list(%ecx),%ebx # wake up sleeping process + testl %ebx,%ebx # is there any? + je 1f + movl $0,(%ebx) +1: incl %edx + inb %dx,%al + jmp 1f +1: jmp 1f +1: andb $0xd,%al /* disable transmit interrupt */ + outb %al,%dx + ret diff --git a/os/os/linux/kernel/chr_drv/serial.c b/os/os/linux/kernel/chr_drv/serial.c new file mode 100644 index 0000000..aba25df --- /dev/null +++ b/os/os/linux/kernel/chr_drv/serial.c @@ -0,0 +1,59 @@ +/* + * linux/kernel/serial.c + * + * (C) 1991 Linus Torvalds + */ + +/* + * serial.c + * + * This module implements the rs232 io functions + * void rs_write(struct tty_struct * queue); + * void rs_init(void); + * and all interrupts pertaining to serial IO. + */ + +#include +#include +#include +#include + +#define WAKEUP_CHARS (TTY_BUF_SIZE/4) + +extern void rs1_interrupt(void); +extern void rs2_interrupt(void); + +static void init(int port) +{ + outb_p(0x80,port+3); /* set DLAB of line control reg */ + outb_p(0x30,port); /* LS of divisor (48 -> 2400 bps */ + outb_p(0x00,port+1); /* MS of divisor */ + outb_p(0x03,port+3); /* reset DLAB */ + outb_p(0x0b,port+4); /* set DTR,RTS, OUT_2 */ + outb_p(0x0d,port+1); /* enable all intrs but writes */ + (void)inb(port); /* read data port to reset things (?) */ +} + +void rs_init(void) +{ + set_intr_gate(0x24,rs1_interrupt); + set_intr_gate(0x23,rs2_interrupt); + init(tty_table[1].read_q.data); + init(tty_table[2].read_q.data); + outb(inb_p(0x21)&0xE7,0x21); +} + +/* + * This routine gets called when tty_write has put something into + * the write_queue. It must check wheter the queue is empty, and + * set the interrupt register accordingly + * + * void _rs_write(struct tty_struct * tty); + */ +void rs_write(struct tty_struct * tty) +{ + cli(); + if (!EMPTY(tty->write_q)) + outb(inb_p(tty->write_q.data+1)|0x02,tty->write_q.data+1); + sti(); +} diff --git a/os/os/linux/kernel/chr_drv/serial.o b/os/os/linux/kernel/chr_drv/serial.o new file mode 100644 index 0000000..bf80e08 Binary files /dev/null and b/os/os/linux/kernel/chr_drv/serial.o differ diff --git a/os/os/linux/kernel/chr_drv/tty_io.c b/os/os/linux/kernel/chr_drv/tty_io.c new file mode 100644 index 0000000..b8da643 --- /dev/null +++ b/os/os/linux/kernel/chr_drv/tty_io.c @@ -0,0 +1,349 @@ +/* + * linux/kernel/tty_io.c + * + * (C) 1991 Linus Torvalds + */ + +/* + * 'tty_io.c' gives an orthogonal feeling to tty's, be they consoles + * or rs-channels. It also implements echoing, cooked mode etc. + * + * Kill-line thanks to John T Kohl. + */ +#include +#include +#include + +#define ALRMMASK (1<<(SIGALRM-1)) +#define KILLMASK (1<<(SIGKILL-1)) +#define INTMASK (1<<(SIGINT-1)) +#define QUITMASK (1<<(SIGQUIT-1)) +#define TSTPMASK (1<<(SIGTSTP-1)) + +#include +#include +#include +#include + +#define _L_FLAG(tty,f) ((tty)->termios.c_lflag & f) +#define _I_FLAG(tty,f) ((tty)->termios.c_iflag & f) +#define _O_FLAG(tty,f) ((tty)->termios.c_oflag & f) + +#define L_CANON(tty) _L_FLAG((tty),ICANON) +#define L_ISIG(tty) _L_FLAG((tty),ISIG) +#define L_ECHO(tty) _L_FLAG((tty),ECHO) +#define L_ECHOE(tty) _L_FLAG((tty),ECHOE) +#define L_ECHOK(tty) _L_FLAG((tty),ECHOK) +#define L_ECHOCTL(tty) _L_FLAG((tty),ECHOCTL) +#define L_ECHOKE(tty) _L_FLAG((tty),ECHOKE) + +#define I_UCLC(tty) _I_FLAG((tty),IUCLC) +#define I_NLCR(tty) _I_FLAG((tty),INLCR) +#define I_CRNL(tty) _I_FLAG((tty),ICRNL) +#define I_NOCR(tty) _I_FLAG((tty),IGNCR) + +#define O_POST(tty) _O_FLAG((tty),OPOST) +#define O_NLCR(tty) _O_FLAG((tty),ONLCR) +#define O_CRNL(tty) _O_FLAG((tty),OCRNL) +#define O_NLRET(tty) _O_FLAG((tty),ONLRET) +#define O_LCUC(tty) _O_FLAG((tty),OLCUC) + +struct tty_struct tty_table[] = { + { + {ICRNL, /* change incoming CR to NL */ + OPOST|ONLCR, /* change outgoing NL to CRNL */ + 0, + ISIG | ICANON | ECHO | ECHOCTL | ECHOKE, + 0, /* console termio */ + INIT_C_CC}, + 0, /* initial pgrp */ + 0, /* initial stopped */ + con_write, + {0,0,0,0,""}, /* console read-queue */ + {0,0,0,0,""}, /* console write-queue */ + {0,0,0,0,""} /* console secondary queue */ + },{ + {0, /* no translation */ + 0, /* no translation */ + B2400 | CS8, + 0, + 0, + INIT_C_CC}, + 0, + 0, + rs_write, + {0x3f8,0,0,0,""}, /* rs 1 */ + {0x3f8,0,0,0,""}, + {0,0,0,0,""} + },{ + {0, /* no translation */ + 0, /* no translation */ + B2400 | CS8, + 0, + 0, + INIT_C_CC}, + 0, + 0, + rs_write, + {0x2f8,0,0,0,""}, /* rs 2 */ + {0x2f8,0,0,0,""}, + {0,0,0,0,""} + } +}; + +/* + * these are the tables used by the machine code handlers. + * you can implement pseudo-tty's or something by changing + * them. Currently not done. + */ +struct tty_queue * table_list[]={ + &tty_table[0].read_q, &tty_table[0].write_q, + &tty_table[1].read_q, &tty_table[1].write_q, + &tty_table[2].read_q, &tty_table[2].write_q + }; + +void tty_init(void) +{ + rs_init(); + con_init(); +} + +void tty_intr(struct tty_struct * tty, int mask) +{ + int i; + + if (tty->pgrp <= 0) + return; + for (i=0;ipgrp==tty->pgrp) + task[i]->signal |= mask; +} + +static void sleep_if_empty(struct tty_queue * queue) +{ + cli(); + while (!current->signal && EMPTY(*queue)) + interruptible_sleep_on(&queue->proc_list); + sti(); +} + +static void sleep_if_full(struct tty_queue * queue) +{ + if (!FULL(*queue)) + return; + cli(); + while (!current->signal && LEFT(*queue)<128) + interruptible_sleep_on(&queue->proc_list); + sti(); +} + +void wait_for_keypress(void) +{ + sleep_if_empty(&tty_table[0].secondary); +} + +void copy_to_cooked(struct tty_struct * tty) +{ + signed char c; + + while (!EMPTY(tty->read_q) && !FULL(tty->secondary)) { + GETCH(tty->read_q,c); + if (c==13) + if (I_CRNL(tty)) + c=10; + else if (I_NOCR(tty)) + continue; + else ; + else if (c==10 && I_NLCR(tty)) + c=13; + if (I_UCLC(tty)) + c=tolower(c); + if (L_CANON(tty)) { + if (c==KILL_CHAR(tty)) { + /* deal with killing the input line */ + while(!(EMPTY(tty->secondary) || + (c=LAST(tty->secondary))==10 || + c==EOF_CHAR(tty))) { + if (L_ECHO(tty)) { + if (c<32) + PUTCH(127,tty->write_q); + PUTCH(127,tty->write_q); + tty->write(tty); + } + DEC(tty->secondary.head); + } + continue; + } + if (c==ERASE_CHAR(tty)) { + if (EMPTY(tty->secondary) || + (c=LAST(tty->secondary))==10 || + c==EOF_CHAR(tty)) + continue; + if (L_ECHO(tty)) { + if (c<32) + PUTCH(127,tty->write_q); + PUTCH(127,tty->write_q); + tty->write(tty); + } + DEC(tty->secondary.head); + continue; + } + if (c==STOP_CHAR(tty)) { + tty->stopped=1; + continue; + } + if (c==START_CHAR(tty)) { + tty->stopped=0; + continue; + } + } + if (L_ISIG(tty)) { + if (c==INTR_CHAR(tty)) { + tty_intr(tty,INTMASK); + continue; + } + if (c==QUIT_CHAR(tty)) { + tty_intr(tty,QUITMASK); + continue; + } + } + if (c==10 || c==EOF_CHAR(tty)) + tty->secondary.data++; + if (L_ECHO(tty)) { + if (c==10) { + PUTCH(10,tty->write_q); + PUTCH(13,tty->write_q); + } else if (c<32) { + if (L_ECHOCTL(tty)) { + PUTCH('^',tty->write_q); + PUTCH(c+64,tty->write_q); + } + } else + PUTCH(c,tty->write_q); + tty->write(tty); + } + PUTCH(c,tty->secondary); + } + wake_up(&tty->secondary.proc_list); +} + +int tty_read(unsigned channel, char * buf, int nr) +{ + struct tty_struct * tty; + char c, * b=buf; + int minimum,time,flag=0; + long oldalarm; + + if (channel>2 || nr<0) return -1; + tty = &tty_table[channel]; + oldalarm = current->alarm; + time = 10L*tty->termios.c_cc[VTIME]; + minimum = tty->termios.c_cc[VMIN]; + if (time && !minimum) { + minimum=1; + if (flag=(!oldalarm || time+jiffiesalarm = time+jiffies; + } + if (minimum>nr) + minimum=nr; + while (nr>0) { + if (flag && (current->signal & ALRMMASK)) { + current->signal &= ~ALRMMASK; + break; + } + if (current->signal) + break; + if (EMPTY(tty->secondary) || (L_CANON(tty) && + !tty->secondary.data && LEFT(tty->secondary)>20)) { + sleep_if_empty(&tty->secondary); + continue; + } + do { + GETCH(tty->secondary,c); + if (c==EOF_CHAR(tty) || c==10) + tty->secondary.data--; + if (c==EOF_CHAR(tty) && L_CANON(tty)) + return (b-buf); + else { + put_fs_byte(c,b++); + if (!--nr) + break; + } + } while (nr>0 && !EMPTY(tty->secondary)); + if (time && !L_CANON(tty)) + if (flag=(!oldalarm || time+jiffiesalarm = time+jiffies; + else + current->alarm = oldalarm; + if (L_CANON(tty)) { + if (b-buf) + break; + } else if (b-buf >= minimum) + break; + } + current->alarm = oldalarm; + if (current->signal && !(b-buf)) + return -EINTR; + return (b-buf); +} + +int tty_write(unsigned channel, char * buf, int nr) +{ + static cr_flag=0; + struct tty_struct * tty; + char c, *b=buf; + + if (channel>2 || nr<0) return -1; + tty = channel + tty_table; + while (nr>0) { + sleep_if_full(&tty->write_q); + if (current->signal) + break; + while (nr>0 && !FULL(tty->write_q)) { + c=get_fs_byte(b); + if (O_POST(tty)) { + if (c=='\r' && O_CRNL(tty)) + c='\n'; + else if (c=='\n' && O_NLRET(tty)) + c='\r'; + if (c=='\n' && !cr_flag && O_NLCR(tty)) { + cr_flag = 1; + PUTCH(13,tty->write_q); + continue; + } + if (O_LCUC(tty)) + c=toupper(c); + } + b++; nr--; + cr_flag = 0; + PUTCH(c,tty->write_q); + } + tty->write(tty); + if (nr>0) + schedule(); + } + return (b-buf); +} + +/* + * Jeh, sometimes I really like the 386. + * This routine is called from an interrupt, + * and there should be absolutely no problem + * with sleeping even in an interrupt (I hope). + * Of course, if somebody proves me wrong, I'll + * hate intel for all time :-). We'll have to + * be careful and see to reinstating the interrupt + * chips before calling this, though. + * + * I don't think we sleep here under normal circumstances + * anyway, which is good, as the task sleeping might be + * totally innocent. + */ +void do_tty_interrupt(int tty) +{ + copy_to_cooked(tty_table+tty); +} + +void chr_dev_init(void) +{ +} diff --git a/os/os/linux/kernel/chr_drv/tty_io.o b/os/os/linux/kernel/chr_drv/tty_io.o new file mode 100644 index 0000000..37e2b15 Binary files /dev/null and b/os/os/linux/kernel/chr_drv/tty_io.o differ diff --git a/os/os/linux/kernel/chr_drv/tty_ioctl.c b/os/os/linux/kernel/chr_drv/tty_ioctl.c new file mode 100644 index 0000000..e4e3745 --- /dev/null +++ b/os/os/linux/kernel/chr_drv/tty_ioctl.c @@ -0,0 +1,204 @@ +/* + * linux/kernel/chr_drv/tty_ioctl.c + * + * (C) 1991 Linus Torvalds + */ + +#include +#include + +#include +#include +#include + +#include +#include +#include + +static unsigned short quotient[] = { + 0, 2304, 1536, 1047, 857, + 768, 576, 384, 192, 96, + 64, 48, 24, 12, 6, 3 +}; + +static void change_speed(struct tty_struct * tty) +{ + unsigned short port,quot; + + if (!(port = tty->read_q.data)) + return; + quot = quotient[tty->termios.c_cflag & CBAUD]; + cli(); + outb_p(0x80,port+3); /* set DLAB */ + outb_p(quot & 0xff,port); /* LS of divisor */ + outb_p(quot >> 8,port+1); /* MS of divisor */ + outb(0x03,port+3); /* reset DLAB */ + sti(); +} + +static void flush(struct tty_queue * queue) +{ + cli(); + queue->head = queue->tail; + sti(); +} + +static void wait_until_sent(struct tty_struct * tty) +{ + /* do nothing - not implemented */ +} + +static void send_break(struct tty_struct * tty) +{ + /* do nothing - not implemented */ +} + +static int get_termios(struct tty_struct * tty, struct termios * termios) +{ + int i; + + verify_area(termios, sizeof (*termios)); + for (i=0 ; i< (sizeof (*termios)) ; i++) + put_fs_byte( ((char *)&tty->termios)[i] , i+(char *)termios ); + return 0; +} + +static int set_termios(struct tty_struct * tty, struct termios * termios) +{ + int i; + + for (i=0 ; i< (sizeof (*termios)) ; i++) + ((char *)&tty->termios)[i]=get_fs_byte(i+(char *)termios); + change_speed(tty); + return 0; +} + +static int get_termio(struct tty_struct * tty, struct termio * termio) +{ + int i; + struct termio tmp_termio; + + verify_area(termio, sizeof (*termio)); + tmp_termio.c_iflag = tty->termios.c_iflag; + tmp_termio.c_oflag = tty->termios.c_oflag; + tmp_termio.c_cflag = tty->termios.c_cflag; + tmp_termio.c_lflag = tty->termios.c_lflag; + tmp_termio.c_line = tty->termios.c_line; + for(i=0 ; i < NCC ; i++) + tmp_termio.c_cc[i] = tty->termios.c_cc[i]; + for (i=0 ; i< (sizeof (*termio)) ; i++) + put_fs_byte( ((char *)&tmp_termio)[i] , i+(char *)termio ); + return 0; +} + +/* + * This only works as the 386 is low-byt-first + */ +static int set_termio(struct tty_struct * tty, struct termio * termio) +{ + int i; + struct termio tmp_termio; + + for (i=0 ; i< (sizeof (*termio)) ; i++) + ((char *)&tmp_termio)[i]=get_fs_byte(i+(char *)termio); + *(unsigned short *)&tty->termios.c_iflag = tmp_termio.c_iflag; + *(unsigned short *)&tty->termios.c_oflag = tmp_termio.c_oflag; + *(unsigned short *)&tty->termios.c_cflag = tmp_termio.c_cflag; + *(unsigned short *)&tty->termios.c_lflag = tmp_termio.c_lflag; + tty->termios.c_line = tmp_termio.c_line; + for(i=0 ; i < NCC ; i++) + tty->termios.c_cc[i] = tmp_termio.c_cc[i]; + change_speed(tty); + return 0; +} + +int tty_ioctl(int dev, int cmd, int arg) +{ + struct tty_struct * tty; + if (MAJOR(dev) == 5) { + dev=current->tty; + if (dev<0) + panic("tty_ioctl: dev<0"); + } else + dev=MINOR(dev); + tty = dev + tty_table; + switch (cmd) { + case TCGETS: + return get_termios(tty,(struct termios *) arg); + case TCSETSF: + flush(&tty->read_q); /* fallthrough */ + case TCSETSW: + wait_until_sent(tty); /* fallthrough */ + case TCSETS: + return set_termios(tty,(struct termios *) arg); + case TCGETA: + return get_termio(tty,(struct termio *) arg); + case TCSETAF: + flush(&tty->read_q); /* fallthrough */ + case TCSETAW: + wait_until_sent(tty); /* fallthrough */ + case TCSETA: + return set_termio(tty,(struct termio *) arg); + case TCSBRK: + if (!arg) { + wait_until_sent(tty); + send_break(tty); + } + return 0; + case TCXONC: + return -EINVAL; /* not implemented */ + case TCFLSH: + if (arg==0) + flush(&tty->read_q); + else if (arg==1) + flush(&tty->write_q); + else if (arg==2) { + flush(&tty->read_q); + flush(&tty->write_q); + } else + return -EINVAL; + return 0; + case TIOCEXCL: + return -EINVAL; /* not implemented */ + case TIOCNXCL: + return -EINVAL; /* not implemented */ + case TIOCSCTTY: + return -EINVAL; /* set controlling term NI */ + case TIOCGPGRP: + verify_area((void *) arg,4); + put_fs_long(tty->pgrp,(unsigned long *) arg); + return 0; + case TIOCSPGRP: + tty->pgrp=get_fs_long((unsigned long *) arg); + return 0; + case TIOCOUTQ: + verify_area((void *) arg,4); + put_fs_long(CHARS(tty->write_q),(unsigned long *) arg); + return 0; + case TIOCINQ: + verify_area((void *) arg,4); + put_fs_long(CHARS(tty->secondary), + (unsigned long *) arg); + return 0; + case TIOCSTI: + return -EINVAL; /* not implemented */ + case TIOCGWINSZ: + return -EINVAL; /* not implemented */ + case TIOCSWINSZ: + return -EINVAL; /* not implemented */ + case TIOCMGET: + return -EINVAL; /* not implemented */ + case TIOCMBIS: + return -EINVAL; /* not implemented */ + case TIOCMBIC: + return -EINVAL; /* not implemented */ + case TIOCMSET: + return -EINVAL; /* not implemented */ + case TIOCGSOFTCAR: + return -EINVAL; /* not implemented */ + case TIOCSSOFTCAR: + return -EINVAL; /* not implemented */ + default: + return -EINVAL; + } +} diff --git a/os/os/linux/kernel/chr_drv/tty_ioctl.o b/os/os/linux/kernel/chr_drv/tty_ioctl.o new file mode 100644 index 0000000..6fcf766 Binary files /dev/null and b/os/os/linux/kernel/chr_drv/tty_ioctl.o differ diff --git a/os/os/linux/kernel/exec2.o b/os/os/linux/kernel/exec2.o new file mode 100644 index 0000000..8c4add4 Binary files /dev/null and b/os/os/linux/kernel/exec2.o differ diff --git a/os/os/linux/kernel/execve2.c b/os/os/linux/kernel/execve2.c new file mode 100644 index 0000000..03c522f --- /dev/null +++ b/os/os/linux/kernel/execve2.c @@ -0,0 +1,359 @@ +/* + * linux/fs/exec.c + * + * (C) 1991 Linus Torvalds + */ + +/* + * #!-checking implemented by tytso. + */ + +/* + * Demand-loading implemented 01.12.91 - no need to read anything but + * the header into memory. The inode of the executable is put into + * "current->executable", and page faults do the actual loading. Clean. + * + * Once more I can proudly say that linux stood up to being changed: it + * was less than 2 hours work to get demand-loading completely implemented. + */ + +#include +#include +#include +#include + +#include +#include +#include +#include +#include + +extern int sys_exit(int exit_code); +extern int sys_close(int fd); + +/* + * MAX_ARG_PAGES defines the number of pages allocated for arguments + * and envelope for the new program. 32 should suffice, this gives + * a maximum env+arg of 128kB ! + */ +#define MAX_ARG_PAGES 32 + +/* + * create_tables() parses the env- and arg-strings in new user + * memory and creates the pointer tables from them, and puts their + * addresses on the "stack", returning the new stack pointer value. + */ +static unsigned long * create_tables(char * p,int argc,int envc) +{ + unsigned long *argv,*envp; + unsigned long * mq; + + mq = (unsigned long *) (0xfffffffc & (unsigned long) p); + mq -= envc+1; + envp = mq; + mq -= argc+1; + argv = mq; + put_fs_long((unsigned long)envp,--mq); + put_fs_long((unsigned long)argv,--mq); + put_fs_long((unsigned long)argc,--mq); + while (argc-->0) { + put_fs_long((unsigned long) p,argv++); + while (get_fs_byte(p++)) /* nothing */ ; + } + put_fs_long(0,argv); + while (envc-->0) { + put_fs_long((unsigned long) p,envp++); + while (get_fs_byte(p++)) /* nothing */ ; + } + put_fs_long(0,envp); + return mq; +} + +/* + * count() counts the number of arguments/envelopes + */ +static int count(char ** argv) +{ + int i=0; + char ** tmp; + + if (tmp = argv) + while (get_fs_long((unsigned long *) (tmp++))) + i++; + + return i; +} + +/* + * 'copy_string()' copies argument/envelope strings from user + * memory to free pages in kernel mem. These are in a format ready + * to be put directly into the top of new user memory. + * + * Modified by TYT, 11/24/91 to add the from_kmem argument, which mqecifies + * whether the string and the string array are from user or kernel segments: + * + * from_kmem argv * argv ** + * 0 user mqace user mqace + * 1 kernel mqace user mqace + * 2 kernel mqace kernel mqace + * + * We do this by playing games with the fs segment register. Since it + * it is expensive to load a segment register, we try to avoid calling + * set_fs() unless we absolutely have to. + */ +static unsigned long copy_strings(int argc,char ** argv,unsigned long *page, + unsigned long p, int from_kmem) +{ + char *tmp, *pag; + int len, offset = 0; + unsigned long old_fs, new_fs; + + if (!p) + return 0; /* bullet-proofing */ + new_fs = get_ds(); + old_fs = get_fs(); + if (from_kmem==2) + set_fs(new_fs); + while (argc-- > 0) { + if (from_kmem == 1) + set_fs(new_fs); + if (!(tmp = (char *)get_fs_long(((unsigned long *)argv)+argc))) + panic("argc is wrong"); + if (from_kmem == 1) + set_fs(old_fs); + len=0; /* remember zero-padding */ + do { + len++; + } while (get_fs_byte(tmp++)); + if (p-len < 0) { /* this shouldn't happen - 128kB */ + set_fs(old_fs); + return 0; + } + while (len) { + --p; --tmp; --len; + if (--offset < 0) { + offset = p % PAGE_SIZE; + if (from_kmem==2) + set_fs(old_fs); + if (!(pag = (char *) page[p/PAGE_SIZE]) && + !(pag = (char *) (page[p/PAGE_SIZE] = + (unsigned long *) get_free_page()))) + return 0; + if (from_kmem==2) + set_fs(new_fs); + + } + *(pag + offset) = get_fs_byte(tmp); + } + } + if (from_kmem==2) + set_fs(old_fs); + return p; +} + +static unsigned long change_ldt(unsigned long text_size,unsigned long * page) +{ + unsigned long code_limit,data_limit,code_base,data_base; + int i; + + code_limit = text_size+PAGE_SIZE -1; + code_limit &= 0xFFFFF000; + data_limit = 0x4000000; + code_base = get_base(current->ldt[1]); + data_base = code_base; + set_base(current->ldt[1],code_base); + set_limit(current->ldt[1],code_limit); + set_base(current->ldt[2],data_base); + set_limit(current->ldt[2],data_limit); +/* make sure fs points to the NEW data segment */ + __asm__("pushl $0x17\n\tpop %%fs"::); + data_base += data_limit; + for (i=MAX_ARG_PAGES-1 ; i>=0 ; i--) { + data_base -= PAGE_SIZE; + if (page[i]) + put_page(page[i],data_base); + } + return data_limit; +} + +/* + * 'do_execve()' executes a new program. + */ +int do_execve2(unsigned long * eip,long tmp,char * filename, + char ** argv, char ** envp) +{ + struct m_inode * inode; + struct buffer_head * sp; + struct exec ex; + unsigned long page[MAX_ARG_PAGES]; + int i,argc,envc; + int e_uid, e_gid; + int retval; + unsigned long currentaddr; + int sh_bang = 0; + unsigned long p=PAGE_SIZE*MAX_ARG_PAGES-4; + + if ((0xffff & eip[1]) != 0x000f) + panic("execve called from supervisor mode"); + for (i=0 ; ii_mode)) { /* must be regular file */ + retval = -EACCES; + goto exec_error2; + } + i = inode->i_mode; + e_uid = (i & S_ISUID) ? inode->i_uid : current->euid; + e_gid = (i & S_ISGID) ? inode->i_gid : current->egid; + if (current->euid == inode->i_uid) + i >>= 6; + else if (current->egid == inode->i_gid) + i >>= 3; + if (!(i & 1) && + !((inode->i_mode & 0111) && suser())) { + retval = -ENOEXEC; + goto exec_error2; + } + if (!(sp = bread(inode->i_dev,inode->i_zone[0]))) { + retval = -EACCES; + goto exec_error2; + } + ex = *((struct exec *) sp->b_data); /* read exec-header */ + if ((sp->b_data[0] == '#') && (sp->b_data[1] == '!') && (!sh_bang)) { + /* + * This section does the #! interpretation. + * Sorta complicated, but hopefully it will work. -TYT + */ + + char buf[1023], *cp, *interp, *i_name, *i_arg; + unsigned long old_fs; + + strncpy(buf, sp->b_data+2, 1022); + brelse(sp); + iput(inode); + buf[1022] = '\0'; + if (cp = strchr(buf, '\n')) { + *cp = '\0'; + for (cp = buf; (*cp == ' ') || (*cp == '\t'); cp++); + } + if (!cp || *cp == '\0') { + retval = -ENOEXEC; /* No interpreter name found */ + goto exec_error1; + } + interp = i_name = cp; + i_arg = 0; + for ( ; *cp && (*cp != ' ') && (*cp != '\t'); cp++) { + if (*cp == '/') + i_name = cp+1; + } + if (*cp) { + *cp++ = '\0'; + i_arg = cp; + } + /* + * OK, we've parsed out the interpreter name and + * (optional) argument. + */ + if (sh_bang++ == 0) { + p = copy_strings(envc, envp, page, p, 0); + p = copy_strings(--argc, argv+1, page, p, 0); + } + /* + * mqlice in (1) the interpreter's name for argv[0] + * (2) (optional) argument to interpreter + * (3) filename of shell script + * + * This is done in reverse order, because of how the + * user environment and arguments are stored. + */ + p = copy_strings(1, &filename, page, p, 1); + argc++; + if (i_arg) { + p = copy_strings(1, &i_arg, page, p, 2); + argc++; + } + p = copy_strings(1, &i_name, page, p, 2); + argc++; + if (!p) { + retval = -ENOMEM; + goto exec_error1; + } + /* + * OK, now restart the process with the interpreter's inode. + */ + old_fs = get_fs(); + set_fs(get_ds()); + if (!(inode=namei(interp))) { /* get executables inode */ + set_fs(old_fs); + retval = -ENOENT; + goto exec_error1; + } + set_fs(old_fs); + goto restart_interp; + } + brelse(sp); + if (N_MAGIC(ex) != ZMAGIC || ex.a_trsize || ex.a_drsize || + ex.a_text+ex.a_data+ex.a_bss>0x3000000 || + inode->i_size < ex.a_text+ex.a_data+ex.a_syms+N_TXTOFF(ex)) { + retval = -ENOEXEC; + goto exec_error2; + } + if (N_TXTOFF(ex) != BLOCK_SIZE) { + printk("%s: N_TXTOFF != BLOCK_SIZE. See a.out.h.", filename); + retval = -ENOEXEC; + goto exec_error2; + } + if (!sh_bang) { + p = copy_strings(envc,envp,page,p,0); + p = copy_strings(argc,argv,page,p,0); + if (!p) { + retval = -ENOMEM; + goto exec_error2; + } + } +/* OK, This is the point of no return */ + if (current->executable) + iput(current->executable); + current->executable = inode; + for (i=0 ; i<32 ; i++) + current->sigaction[i].sa_handler = NULL; + for (i=0 ; iclose_on_exec>>i)&1) + sys_close(i); + current->close_on_exec = 0; + free_page_tables(get_base(current->ldt[1]),get_limit(0x0f)); + free_page_tables(get_base(current->ldt[2]),get_limit(0x17)); + if (last_task_used_math == current) + last_task_used_math = NULL; + current->used_math = 0; + p += change_ldt(ex.a_text,page)-MAX_ARG_PAGES*PAGE_SIZE; + p = (unsigned long) create_tables((char *)p,argc,envc); + current->brk = ex.a_bss + + (current->end_data = ex.a_data + + (current->end_code = ex.a_text)); + current->start_stack = p & 0xfffff000; + current->euid = e_uid; + current->egid = e_gid; + + //add brk 用于指明进程当前数据段（包括未初始化数据部分）末端位置，供内核为进程分配内存时指定分配开始位置。 + for (currentaddr=0; currentaddrbrk; currentaddr+=0x1000) + do_no_pagex(6, currentaddr+current->start_code);//error code=6表示执行一般代码，由写操作引起。 + + i = ex.a_text+ex.a_data; + while (i&0xfff) + put_fs_byte(0,(char *) (i++)); + eip[0] = ex.a_entry; /* eip, magic happens :-) */ + eip[3] = p; /* stack pointer */ + return 0; +exec_error2: + iput(inode); +exec_error1: + for (i=0 ; i +#include +#include + +#include +#include +#include +#include + +int sys_pause(void); +int sys_close(int fd); + +void release(struct task_struct * p) +{ + int i; + + if (!p) + return; + for (i=1 ; i32) + return -EINVAL; + if (priv || (current->euid==p->euid) || suser()) + p->signal |= (1<<(sig-1)); + else + return -EPERM; + return 0; +} + +static void kill_session(void) +{ + struct task_struct **p = NR_TASKS + task; + + while (--p > &FIRST_TASK) { + if (*p && (*p)->session == current->session) + (*p)->signal |= 1<<(SIGHUP-1); + } +} + +/* + * XXX need to check permissions needed to send signals to process + * groups, etc. etc. kill() permissions semantics are tricky! + */ +int sys_kill(int pid,int sig) +{ + struct task_struct **p = NR_TASKS + task; + int err, retval = 0; + + if (!pid) while (--p > &FIRST_TASK) { + if (*p && (*p)->pgrp == current->pid) + if (err=send_sig(sig,*p,1)) + retval = err; + } else if (pid>0) while (--p > &FIRST_TASK) { + if (*p && (*p)->pid == pid) + if (err=send_sig(sig,*p,0)) + retval = err; + } else if (pid == -1) while (--p > &FIRST_TASK) + if (err = send_sig(sig,*p,0)) + retval = err; + else while (--p > &FIRST_TASK) + if (*p && (*p)->pgrp == -pid) + if (err = send_sig(sig,*p,0)) + retval = err; + return retval; +} + +static void tell_father(int pid) +{ + int i; + + if (pid) + for (i=0;ipid != pid) + continue; + task[i]->signal |= (1<<(SIGCHLD-1)); + return; + } +/* if we don't find any fathers, we just release ourselves */ +/* This is not really OK. Must change it to make father 1 */ + printk("BAD BAD - no father found\n\r"); + release(current); +} + +int do_exit(long code) +{ + int i; + + free_page_tables(get_base(current->ldt[1]),get_limit(0x0f)); + free_page_tables(get_base(current->ldt[2]),get_limit(0x17)); + for (i=0 ; ifather == current->pid) { + task[i]->father = 1; + if (task[i]->state == TASK_ZOMBIE) + /* assumption task[1] is always init */ + (void) send_sig(SIGCHLD, task[1], 1); + } + for (i=0 ; ifilp[i]) + sys_close(i); + iput(current->pwd); + current->pwd=NULL; + iput(current->root); + current->root=NULL; + iput(current->executable); + current->executable=NULL; + if (current->leader && current->tty >= 0) + tty_table[current->tty].pgrp = 0; + if (last_task_used_math == current) + last_task_used_math = NULL; + if (current->leader) + kill_session(); + current->state = TASK_ZOMBIE; + current->exit_code = code; + tell_father(current->father); + schedule(); + return (-1); /* just to suppress warnings */ +} + +int sys_exit(int error_code) +{ + return do_exit((error_code&0xff)<<8); +} + +int sys_waitpid(pid_t pid,unsigned long * stat_addr, int options) +{ + int flag, code; + struct task_struct ** p; + + verify_area(stat_addr,4); +repeat: + flag=0; + for(p = &LAST_TASK ; p > &FIRST_TASK ; --p) { + if (!*p || *p == current) + continue; + if ((*p)->father != current->pid) + continue; + if (pid>0) { + if ((*p)->pid != pid) + continue; + } else if (!pid) { + if ((*p)->pgrp != current->pgrp) + continue; + } else if (pid != -1) { + if ((*p)->pgrp != -pid) + continue; + } + switch ((*p)->state) { + case TASK_STOPPED: + if (!(options & WUNTRACED)) + continue; + put_fs_long(0x7f,stat_addr); + return (*p)->pid; + case TASK_ZOMBIE: + current->cutime += (*p)->utime; + current->cstime += (*p)->stime; + flag = (*p)->pid; + code = (*p)->exit_code; + release(*p); + put_fs_long(code,stat_addr); + return flag; + default: + flag=1; + continue; + } + } + if (flag) { + if (options & WNOHANG) + return 0; + current->state=TASK_INTERRUPTIBLE; + schedule(); + if (!(current->signal &= ~(1<<(SIGCHLD-1)))) + goto repeat; + else + return -EINTR; + } + return -ECHILD; +} + + diff --git a/os/os/linux/kernel/exit.o b/os/os/linux/kernel/exit.o new file mode 100644 index 0000000..97c5057 Binary files /dev/null and b/os/os/linux/kernel/exit.o differ diff --git a/os/os/linux/kernel/fork.c b/os/os/linux/kernel/fork.c new file mode 100644 index 0000000..816fdba --- /dev/null +++ b/os/os/linux/kernel/fork.c @@ -0,0 +1,148 @@ +/* + * linux/kernel/fork.c + * + * (C) 1991 Linus Torvalds + */ + +/* + * 'fork.c' contains the help-routines for the 'fork' system call + * (see also system_call.s), and some misc functions ('verify_area'). + * Fork is rather simple, once you get the hang of it, but the memory + * management can be a bitch. See 'mm/mm.c': 'copy_page_tables()' + */ +#include + +#include +#include +#include +#include + +extern void write_verify(unsigned long address); + +long last_pid=0; + +void verify_area(void * addr,int size) +{ + unsigned long start; + + start = (unsigned long) addr; + size += start & 0xfff; + start &= 0xfffff000; + start += get_base(current->ldt[2]); + while (size>0) { + size -= 4096; + write_verify(start); + start += 4096; + } +} + +int copy_mem(int nr,struct task_struct * p) +{ + unsigned long old_data_base,new_data_base,data_limit; + unsigned long old_code_base,new_code_base,code_limit; + + code_limit=get_limit(0x0f); + data_limit=get_limit(0x17); + old_code_base = get_base(current->ldt[1]); + old_data_base = get_base(current->ldt[2]); + if (old_data_base != old_code_base) + panic("We don't support separate I&D"); + if (data_limit < code_limit) + panic("Bad data_limit"); + new_data_base = new_code_base = nr * 0x4000000; + p->start_code = new_code_base; + set_base(p->ldt[1],new_code_base); + set_base(p->ldt[2],new_data_base); + if (copy_page_tables(old_data_base,new_data_base,data_limit)) { + free_page_tables(new_data_base,data_limit); + return -ENOMEM; + } + return 0; +} + +/* + * Ok, this is the main fork-routine. It copies the system process + * information (task[nr]) and sets up the necessary registers. It + * also copies the data segment in it's entirety. + */ +int copy_process(int nr,long ebp,long edi,long esi,long gs,long none, + long ebx,long ecx,long edx, + long fs,long es,long ds, + long eip,long cs,long eflags,long esp,long ss) +{ + struct task_struct *p; + int i; + struct file *f; + + p = (struct task_struct *) get_free_page(); + if (!p) + return -EAGAIN; + task[nr] = p; + __asm__ volatile ("cld"); /* by wyj */ + *p = *current; /* NOTE! this doesn't copy the supervisor stack */ + p->state = TASK_UNINTERRUPTIBLE; + p->pid = last_pid; + p->father = current->pid; + p->counter = p->priority; + p->signal = 0; + p->alarm = 0; + p->leader = 0; /* process leadership doesn't inherit */ + p->utime = p->stime = 0; + p->cutime = p->cstime = 0; + p->start_time = jiffies; + p->tss.back_link = 0; + p->tss.esp0 = PAGE_SIZE + (long) p; + p->tss.ss0 = 0x10; + p->tss.eip = eip; + p->tss.eflags = eflags; + p->tss.eax = 0; + p->tss.ecx = ecx; + p->tss.edx = edx; + p->tss.ebx = ebx; + p->tss.esp = esp; + p->tss.ebp = ebp; + p->tss.esi = esi; + p->tss.edi = edi; + p->tss.es = es & 0xffff; + p->tss.cs = cs & 0xffff; + p->tss.ss = ss & 0xffff; + p->tss.ds = ds & 0xffff; + p->tss.fs = fs & 0xffff; + p->tss.gs = gs & 0xffff; + p->tss.ldt = _LDT(nr); + p->tss.trace_bitmap = 0x80000000; + if (last_task_used_math == current) + __asm__("clts ; fnsave %0"::"m" (p->tss.i387)); + if (copy_mem(nr,p)) { + task[nr] = NULL; + free_page((long) p); + return -EAGAIN; + } + for (i=0; ifilp[i]) + f->f_count++; + if (current->pwd) + current->pwd->i_count++; + if (current->root) + current->root->i_count++; + if (current->executable) + current->executable->i_count++; + set_tss_desc(gdt+(nr<<1)+FIRST_TSS_ENTRY,&(p->tss)); + set_ldt_desc(gdt+(nr<<1)+FIRST_LDT_ENTRY,&(p->ldt)); + p->state = TASK_RUNNING; /* do this last, just in case */ + return last_pid; +} + +int find_empty_process(void) +{ + int i; + + repeat: + if ((++last_pid)<0) last_pid=1; + for(i=0 ; ipid == last_pid) goto repeat; + for(i=1 ; i +#include +#include +#include + +#include +#include +#include +#include +#include + +struct linux_dirent { + long d_ino; + off_t d_off; + unsigned short d_reclen; + char d_name[14]; +}; + +int sys_getdents(unsigned int fd, struct linux_dirent *d, unsigned int count) +{ + struct file *f; + struct m_inode * m; + struct buffer_head * b; + struct dir_entry * dir; + int i,j,k,res; + struct linux_dirent usrd; + i=0; + res=0; + f=current->filp[fd]; + m=f->f_inode; + b=bread(m->i_dev,m->i_zone[0]); + dir=(struct dir_entry*)b->b_data; + while(dir[i].inode>0) + { + if(res+sizeof(struct linux_dirent)>count) + break; + usrd.d_ino=dir[i].inode; + usrd.d_off=0; + usrd.d_reclen=sizeof(struct linux_dirent); + for(j=0;j<14;j++) + usrd.d_name[j]=dir[i].name[j]; + for(k=0;kroot->i_dev; + inode=current->pwd; + inum=inode->i_num; + b=bread(dev,inode->i_zone[0]); + d=(struct dir_entry*) b->b_data; + i=0; + l=0; + while(inum!=1) + { + inode=iget(dev, d[1].inode); + b=bread(dev,inode->i_zone[0]); + d=(struct dir_entry*) b->b_data; + j=0; + while(d[j].inode!=inum) j++; + inum=inode->i_num; + path[i]=d[j].name; + i++; + } + while(i>0) + { + i--; + put_fs_byte('/',buf+l); + l++; + k=0; + while(path[i][k]!='\0') + { + put_fs_byte(path[i][k],buf+l); + l++; + if(l>=size) break; + k++; + } + if(l>=size) break; + } + return buf; +} + + + diff --git a/os/os/linux/kernel/getdents.o b/os/os/linux/kernel/getdents.o new file mode 100644 index 0000000..8c22938 Binary files /dev/null and b/os/os/linux/kernel/getdents.o differ diff --git a/os/os/linux/kernel/kernel.o b/os/os/linux/kernel/kernel.o new file mode 100644 index 0000000..08c2124 Binary files /dev/null and b/os/os/linux/kernel/kernel.o differ diff --git a/os/os/linux/kernel/math/Makefile b/os/os/linux/kernel/math/Makefile new file mode 100644 index 0000000..b35d488 --- /dev/null +++ b/os/os/linux/kernel/math/Makefile @@ -0,0 +1,43 @@ +# +# Makefile for the FREAX-kernel character device drivers. +# +# Note! Dependencies are done automagically by 'make dep', which also +# removes any old dependencies. DON'T put your own dependencies here +# unless it's something special (ie not a .c file). +# + +AR =ar +AS =as +LD =ld +LDFLAGS =-s -x +CC =gcc -march=i386 +CFLAGS =-w -g -fstrength-reduce -fomit-frame-pointer -mcld \ + -nostdinc -fno-stack-protector -I../../include +CPP =gcc -E -nostdinc -I../../include + +.c.s: + $(CC) $(CFLAGS) \ + -S -o $*.s $< +.s.o: + $(AS) -o $*.o $< +.c.o: + $(CC) $(CFLAGS) \ + -c -o $*.o $< + +OBJS = math_emulate.o + +math.a: $(OBJS) + $(AR) rcs math.a $(OBJS) + sync + +clean: + rm -f core *.o *.a tmp_make + for i in *.c;do rm -f `basename $$i .c`.s;done + +dep: + sed '/\#\#\# Dependencies/q' < Makefile > tmp_make + (for i in *.c;do echo -n `echo $$i | sed 's,\.c,\.s,'`" "; \ + $(CPP) -M $$i;done) >> tmp_make + cp tmp_make Makefile + +### Dependencies: diff --git a/os/os/linux/kernel/math/math.a b/os/os/linux/kernel/math/math.a new file mode 100644 index 0000000..f92fb43 Binary files /dev/null and b/os/os/linux/kernel/math/math.a differ diff --git a/os/os/linux/kernel/math/math_emulate.c b/os/os/linux/kernel/math/math_emulate.c new file mode 100644 index 0000000..825e528 --- /dev/null +++ b/os/os/linux/kernel/math/math_emulate.c @@ -0,0 +1,42 @@ +/* + * linux/kernel/math/math_emulate.c + * + * (C) 1991 Linus Torvalds + */ + +/* + * This directory should contain the math-emulation code. + * Currently only results in a signal. + */ + +#include + +#include +#include +#include + +void math_emulate(long edi, long esi, long ebp, long sys_call_ret, + long eax,long ebx,long ecx,long edx, + unsigned short fs,unsigned short es,unsigned short ds, + unsigned long eip,unsigned short cs,unsigned long eflags, + unsigned short ss, unsigned long esp) +{ + unsigned char first, second; + +/* 0x0007 means user code space */ + if (cs != 0x000F) { + printk("math_emulate: %04x:%08x\n\r",cs,eip); + panic("Math emulation needed in kernel"); + } + first = get_fs_byte((char *)((*&eip)++)); + second = get_fs_byte((char *)((*&eip)++)); + printk("%04x:%08x %02x %02x\n\r",cs,eip-2,first,second); + current->signal |= 1<<(SIGFPE-1); +} + +void math_error(void) +{ + __asm__("fnclex"); + if (last_task_used_math) + last_task_used_math->signal |= 1<<(SIGFPE-1); +} diff --git a/os/os/linux/kernel/math/math_emulate.o b/os/os/linux/kernel/math/math_emulate.o new file mode 100644 index 0000000..8a98b22 Binary files /dev/null and b/os/os/linux/kernel/math/math_emulate.o differ diff --git a/os/os/linux/kernel/mktime.c b/os/os/linux/kernel/mktime.c new file mode 100644 index 0000000..a6d03ca --- /dev/null +++ b/os/os/linux/kernel/mktime.c @@ -0,0 +1,58 @@ +/* + * linux/kernel/mktime.c + * + * (C) 1991 Linus Torvalds + */ + +#include + +/* + * This isn't the library routine, it is only used in the kernel. + * as such, we don't care about years<1970 etc, but assume everything + * is ok. Similarly, TZ etc is happily ignored. We just do everything + * as easily as possible. Let's find something public for the library + * routines (although I think minix times is public). + */ +/* + * PS. I hate whoever though up the year 1970 - couldn't they have gotten + * a leap-year instead? I also hate Gregorius, pope or no. I'm grumpy. + */ +#define MINUTE 60 +#define HOUR (60*MINUTE) +#define DAY (24*HOUR) +#define YEAR (365*DAY) + +/* interestingly, we assume leap-years */ +static int month[12] = { + 0, + DAY*(31), + DAY*(31+29), + DAY*(31+29+31), + DAY*(31+29+31+30), + DAY*(31+29+31+30+31), + DAY*(31+29+31+30+31+30), + DAY*(31+29+31+30+31+30+31), + DAY*(31+29+31+30+31+30+31+31), + DAY*(31+29+31+30+31+30+31+31+30), + DAY*(31+29+31+30+31+30+31+31+30+31), + DAY*(31+29+31+30+31+30+31+31+30+31+30) +}; + +long kernel_mktime(struct tm * tm) +{ + long res; + int year; + if (tm->tm_year < 70 ) tm->tm_year += 100; /* gohigh */ + year = tm->tm_year - 70; +/* magic offsets (y+1) needed to get leapyears right.*/ + res = YEAR*year + DAY*((year+1)/4); + res += month[tm->tm_mon]; +/* and (y+2) here. If it wasn't a leap-year, we have to adjust */ + if (tm->tm_mon>1 && ((year+2)%4)) + res -= DAY; + res += DAY*(tm->tm_mday-1); + res += HOUR*tm->tm_hour; + res += MINUTE*tm->tm_min; + res += tm->tm_sec; + return res; +} diff --git a/os/os/linux/kernel/mktime.o b/os/os/linux/kernel/mktime.o new file mode 100644 index 0000000..6694bf8 Binary files /dev/null and b/os/os/linux/kernel/mktime.o differ diff --git a/os/os/linux/kernel/panic.c b/os/os/linux/kernel/panic.c new file mode 100644 index 0000000..7d8a06b --- /dev/null +++ b/os/os/linux/kernel/panic.c @@ -0,0 +1,24 @@ +/* + * linux/kernel/panic.c + * + * (C) 1991 Linus Torvalds + */ + +/* + * This function is used through-out the kernel (includeinh mm and fs) + * to indicate a major problem. + */ +#include +#include + +void sys_sync(void); /* it's really int */ + +volatile void panic(const char * s) +{ + printk("Kernel panic: %s\n\r",s); + if (current == task[0]) + printk("In swapper task - not syncing\n\r"); + else + sys_sync(); + for(;;); +} diff --git a/os/os/linux/kernel/panic.o b/os/os/linux/kernel/panic.o new file mode 100644 index 0000000..da42b57 Binary files /dev/null and b/os/os/linux/kernel/panic.o differ diff --git a/os/os/linux/kernel/pipe2.c b/os/os/linux/kernel/pipe2.c new file mode 100644 index 0000000..8ee1c43 --- /dev/null +++ b/os/os/linux/kernel/pipe2.c @@ -0,0 +1,55 @@ +/* + * linux/fs/pipe.c + * + * (C) 1991 Linus Torvalds + */ + +#include + +#include +#include /* for get_free_page */ +#include + + +int sys_pipe2(unsigned long * fildes,int flag) +{ + struct m_inode * inode; + struct file * f[2]; + int fd[2]; + int i,j; + if(flag==0){ + j=0; + for(i=0;j<2 && if_count++; + if (j==1) + f[0]->f_count=0; + if (j<2) + return -1; + j=0; + for(i=0;j<2 && ifilp[i]) { + current->filp[ fd[j]=i ] = f[j]; + j++; + } + if (j==1) + current->filp[fd[0]]=NULL; + if (j<2) { + f[0]->f_count=f[1]->f_count=0; + return -1; + } + if (!(inode=get_pipe_inode())) { + current->filp[fd[0]] = + current->filp[fd[1]] = NULL; + f[0]->f_count = f[1]->f_count = 0; + return -1; + } + f[0]->f_inode = f[1]->f_inode = inode; + f[0]->f_pos = f[1]->f_pos = 0; + f[0]->f_mode = 1; /* read */ + f[1]->f_mode = 2; /* write */ + put_fs_long(fd[0],0+fildes); + put_fs_long(fd[1],1+fildes); + } + return 0; +} diff --git a/os/os/linux/kernel/pipe2.o b/os/os/linux/kernel/pipe2.o new file mode 100644 index 0000000..1b0316d Binary files /dev/null and b/os/os/linux/kernel/pipe2.o differ diff --git a/os/os/linux/kernel/printk.c b/os/os/linux/kernel/printk.c new file mode 100644 index 0000000..0daa097 --- /dev/null +++ b/os/os/linux/kernel/printk.c @@ -0,0 +1,41 @@ +/* + * linux/kernel/printk.c + * + * (C) 1991 Linus Torvalds + */ + +/* + * When in kernel-mode, we cannot use printf, as fs is liable to + * point to 'interesting' things. Make a printf with fs-saving, and + * all is well. + */ +#include +#include + +#include + +static char buf[1024]; + +extern int vsprintf(char * buf, const char * fmt, va_list args); + +int printk(const char *fmt, ...) +{ + va_list args; + int i; + + va_start(args, fmt); + i=vsprintf(buf,fmt,args); + va_end(args); + __asm__("push %%fs\n\t" + "push %%ds\n\t" + "pop %%fs\n\t" + "pushl %0\n\t" + "pushl $buf\n\t" + "pushl $0\n\t" + "call tty_write\n\t" + "addl $8,%%esp\n\t" + "popl %0\n\t" + "pop %%fs" + ::"r" (i):"ax","cx","dx"); + return i; +} diff --git a/os/os/linux/kernel/printk.o b/os/os/linux/kernel/printk.o new file mode 100644 index 0000000..93ce6e4 Binary files /dev/null and b/os/os/linux/kernel/printk.o differ diff --git a/os/os/linux/kernel/sched.c b/os/os/linux/kernel/sched.c new file mode 100644 index 0000000..15d839b --- /dev/null +++ b/os/os/linux/kernel/sched.c @@ -0,0 +1,412 @@ +/* + * linux/kernel/sched.c + * + * (C) 1991 Linus Torvalds + */ + +/* + * 'sched.c' is the main kernel file. It contains scheduling primitives + * (sleep_on, wakeup, schedule etc) as well as a number of simple system + * call functions (type getpid(), which just extracts a field from + * current-task + */ +#include +#include +#include +#include +#include +#include +#include + +#include + +#define _S(nr) (1<<((nr)-1)) +#define _BLOCKABLE (~(_S(SIGKILL) | _S(SIGSTOP))) + +void show_task(int nr,struct task_struct * p) +{ + int i,j = 4096-sizeof(struct task_struct); + + printk("%d: pid=%d, state=%d, ",nr,p->pid,p->state); + i=0; + while (i>2 ] ; + +struct { + long * a; + short b; + } stack_start = { & user_stack [PAGE_SIZE>>2] , 0x10 }; +/* + * 'math_state_restore()' saves the current math information in the + * old math state array, and gets the new ones from the current task + */ +void math_state_restore() +{ + if (last_task_used_math == current) + return; + __asm__("fwait"); + if (last_task_used_math) { + __asm__("fnsave %0"::"m" (last_task_used_math->tss.i387)); + } + last_task_used_math=current; + if (current->used_math) { + __asm__("frstor %0"::"m" (current->tss.i387)); + } else { + __asm__("fninit"::); + current->used_math=1; + } +} + +/* + * 'schedule()' is the scheduler function. This is GOOD CODE! There + * probably won't be any reason to change this, as it should work well + * in all circumstances (ie gives IO-bound processes good response etc). + * The one thing you might take a look at is the signal-handler code here. + * + * NOTE!! Task 0 is the 'idle' task, which gets called when no other + * tasks can run. It can not be killed, and it cannot sleep. The 'state' + * information in task[0] is never used. + */ +void schedule(void) +{ + int i,next,c; + struct task_struct ** p; + +/* check alarm, wake up any interruptible tasks that have got a signal */ + + for(p = &LAST_TASK ; p > &FIRST_TASK ; --p) + if (*p) { + if ((*p)->alarm && (*p)->alarm < jiffies) { + (*p)->signal |= (1<<(SIGALRM-1)); + (*p)->alarm = 0; + } + if (((*p)->signal & ~(_BLOCKABLE & (*p)->blocked)) && + (*p)->state==TASK_INTERRUPTIBLE) + (*p)->state=TASK_RUNNING; + } + +/* this is the scheduler proper: */ + + while (1) { + c = -1; + next = 0; + i = NR_TASKS; + p = &task[NR_TASKS]; + while (--i) { + if (!*--p) + continue; + if ((*p)->state == TASK_RUNNING && (*p)->counter > c) + c = (*p)->counter, next = i; + } + if (c) break; + for(p = &LAST_TASK ; p > &FIRST_TASK ; --p) + if (*p) + (*p)->counter = ((*p)->counter >> 1) + + (*p)->priority; + } + switch_to(next); +} + +int sys_pause(void) +{ + current->state = TASK_INTERRUPTIBLE; + schedule(); + return 0; +} + +void sleep_on(struct task_struct **p) +{ + struct task_struct *tmp; + + if (!p) + return; + if (current == &(init_task.task)) + panic("task[0] trying to sleep"); + tmp = *p; + *p = current; + current->state = TASK_UNINTERRUPTIBLE; + schedule(); + if (tmp) + tmp->state=0; +} + +void interruptible_sleep_on(struct task_struct **p) +{ + struct task_struct *tmp; + + if (!p) + return; + if (current == &(init_task.task)) + panic("task[0] trying to sleep"); + tmp=*p; + *p=current; +repeat: current->state = TASK_INTERRUPTIBLE; + schedule(); + if (*p && *p != current) { + (**p).state=0; + goto repeat; + } + *p=NULL; + if (tmp) + tmp->state=0; +} + +void wake_up(struct task_struct **p) +{ + if (p && *p) { + (**p).state=0; + *p=NULL; + } +} + +/* + * OK, here are some floppy things that shouldn't be in the kernel + * proper. They are here because the floppy needs a timer, and this + * was the easiest way of doing it. + */ +static struct task_struct * wait_motor[4] = {NULL,NULL,NULL,NULL}; +static int mon_timer[4]={0,0,0,0}; +static int moff_timer[4]={0,0,0,0}; +unsigned char current_DOR = 0x0C; + +int ticks_to_floppy_on(unsigned int nr) +{ + extern unsigned char selected; + unsigned char mask = 0x10 << nr; + + if (nr>3) + panic("floppy_on: nr>3"); + moff_timer[nr]=10000; /* 100 s = very big :-) */ + cli(); /* use floppy_off to turn it off */ + mask |= current_DOR; + if (!selected) { + mask &= 0xFC; + mask |= nr; + } + if (mask != current_DOR) { + outb(mask,FD_DOR); + if ((mask ^ current_DOR) & 0xf0) + mon_timer[nr] = HZ/2; + else if (mon_timer[nr] < 2) + mon_timer[nr] = 2; + current_DOR = mask; + } + sti(); + return mon_timer[nr]; +} + +void floppy_on(unsigned int nr) +{ + cli(); + while (ticks_to_floppy_on(nr)) + sleep_on(nr+wait_motor); + sti(); +} + +void floppy_off(unsigned int nr) +{ + moff_timer[nr]=3*HZ; +} + +void do_floppy_timer(void) +{ + int i; + unsigned char mask = 0x10; + + for (i=0 ; i<4 ; i++,mask <<= 1) { + if (!(mask & current_DOR)) + continue; + if (mon_timer[i]) { + if (!--mon_timer[i]) + wake_up(i+wait_motor); + } else if (!moff_timer[i]) { + current_DOR &= ~mask; + outb(current_DOR,FD_DOR); + } else + moff_timer[i]--; + } +} + +#define TIME_REQUESTS 64 + +static struct timer_list { + long jiffies; + void (*fn)(); + struct timer_list * next; +} timer_list[TIME_REQUESTS], * next_timer = NULL; + +void add_timer(long jiffies, void (*fn)(void)) +{ + struct timer_list * p; + + if (!fn) + return; + cli(); + if (jiffies <= 0) + (fn)(); + else { + for (p = timer_list ; p < timer_list + TIME_REQUESTS ; p++) + if (!p->fn) + break; + if (p >= timer_list + TIME_REQUESTS) + panic("No more time requests free"); + p->fn = fn; + p->jiffies = jiffies; + p->next = next_timer; + next_timer = p; + while (p->next && p->next->jiffies < p->jiffies) { + p->jiffies -= p->next->jiffies; + fn = p->fn; + p->fn = p->next->fn; + p->next->fn = fn; + jiffies = p->jiffies; + p->jiffies = p->next->jiffies; + p->next->jiffies = jiffies; + p = p->next; + } + } + sti(); +} + +void do_timer(long cpl) +{ + extern int beepcount; + extern void sysbeepstop(void); + + if (beepcount) + if (!--beepcount) + sysbeepstop(); + + if (cpl) + current->utime++; + else + current->stime++; + + if (next_timer) { + next_timer->jiffies--; + while (next_timer && next_timer->jiffies <= 0) { + void (*fn)(void); + + fn = next_timer->fn; + next_timer->fn = NULL; + next_timer = next_timer->next; + (fn)(); + } + } + if (current_DOR & 0xf0) + do_floppy_timer(); + if ((--current->counter)>0) return; + current->counter=0; + if (!cpl) return; + schedule(); +} + +int sys_alarm(long seconds) +{ + int old = current->alarm; + + if (old) + old = (old - jiffies) / HZ; + current->alarm = (seconds>0)?(jiffies+HZ*seconds):0; + return (old); +} + +int sys_getpid(void) +{ + return current->pid; +} + +int sys_getppid(void) +{ + return current->father; +} + +int sys_getuid(void) +{ + return current->uid; +} + +int sys_geteuid(void) +{ + return current->euid; +} + +int sys_getgid(void) +{ + return current->gid; +} + +int sys_getegid(void) +{ + return current->egid; +} + +int sys_nice(long increment) +{ + if (current->priority-increment>0) + current->priority -= increment; + return 0; +} + +void sched_init(void) +{ + int i; + struct desc_struct * p; + + if (sizeof(struct sigaction) != 16) + panic("Struct sigaction MUST be 16 bytes"); + set_tss_desc(gdt+FIRST_TSS_ENTRY,&(init_task.task.tss)); + set_ldt_desc(gdt+FIRST_LDT_ENTRY,&(init_task.task.ldt)); + p = gdt+2+FIRST_TSS_ENTRY; + for(i=1;ia=p->b=0; + p++; + p->a=p->b=0; + p++; + } +/* Clear NT, so that we won't have troubles with that later on */ + __asm__("pushfl ; andl $0xffffbfff,(%esp) ; popfl"); + ltr(0); + lldt(0); + outb_p(0x36,0x43); /* binary, mode 3, LSB/MSB, ch 0 */ + outb_p(LATCH & 0xff , 0x40); /* LSB */ + outb(LATCH >> 8 , 0x40); /* MSB */ + set_intr_gate(0x20,&timer_interrupt); + outb(inb_p(0x21)&~0x01,0x21); + set_system_gate(0x80,&system_call); +} diff --git a/os/os/linux/kernel/sched.o b/os/os/linux/kernel/sched.o new file mode 100644 index 0000000..11112c0 Binary files /dev/null and b/os/os/linux/kernel/sched.o differ diff --git a/os/os/linux/kernel/signal.c b/os/os/linux/kernel/signal.c new file mode 100644 index 0000000..8d5a65f --- /dev/null +++ b/os/os/linux/kernel/signal.c @@ -0,0 +1,129 @@ +/* + * linux/kernel/signal.c + * + * (C) 1991 Linus Torvalds + */ + +#include +#include +#include +#include +#include + +volatile void do_exit(int error_code); + +int sys_sgetmask() +{ + return current->blocked; +} + +int sys_ssetmask(int newmask) +{ + int old=current->blocked; + + current->blocked = newmask & ~(1<<(SIGKILL-1)); + return old; +} + +int sys_sigpending() +{ + return -ENOSYS; +} + +int sys_sigsuspend() +{ + return -ENOSYS; +} + +static inline void save_old(char * from,char * to) +{ + int i; + + verify_area(to, sizeof(struct sigaction)); + for (i=0 ; i< sizeof(struct sigaction) ; i++) { + put_fs_byte(*from,to); + from++; + to++; + } +} + +static inline void get_new(char * from,char * to) +{ + int i; + + for (i=0 ; i< sizeof(struct sigaction) ; i++) + *(to++) = get_fs_byte(from++); +} + +int sys_signal(int signum, long handler, long restorer) +{ + struct sigaction tmp; + + if (signum<1 || signum>32 || signum==SIGKILL) + return -1; + tmp.sa_handler = (void (*)(int)) handler; + tmp.sa_mask = 0; + tmp.sa_flags = SA_ONESHOT | SA_NOMASK; + tmp.sa_restorer = (void (*)(void)) restorer; + handler = (long) current->sigaction[signum-1].sa_handler; + current->sigaction[signum-1] = tmp; + return handler; +} + +int sys_sigaction(int signum, const struct sigaction * action, + struct sigaction * oldaction) +{ + struct sigaction tmp; + + if (signum<1 || signum>32 || signum==SIGKILL) + return -1; + tmp = current->sigaction[signum-1]; + get_new((char *) action, + (char *) (signum-1+current->sigaction)); + if (oldaction) + save_old((char *) &tmp,(char *) oldaction); + if (current->sigaction[signum-1].sa_flags & SA_NOMASK) + current->sigaction[signum-1].sa_mask = 0; + else + current->sigaction[signum-1].sa_mask |= (1<<(signum-1)); + return 0; +} + +void do_signal(long signr,long eax, long ebx, long ecx, long edx, + long fs, long es, long ds, + long eip, long cs, long eflags, + unsigned long * esp, long ss) +{ + unsigned long sa_handler; + long old_eip=eip; + struct sigaction * sa = current->sigaction + signr - 1; + int longs; + unsigned long * tmp_esp; + + sa_handler = (unsigned long) sa->sa_handler; + if (sa_handler==1) + return; + if (!sa_handler) { + if (signr==SIGCHLD) + return; + else + do_exit(1<<(signr-1)); + } + if (sa->sa_flags & SA_ONESHOT) + sa->sa_handler = NULL; + *(&eip) = sa_handler; + longs = (sa->sa_flags & SA_NOMASK)?7:8; + *(&esp) -= longs; + verify_area(esp,longs*4); + tmp_esp=esp; + put_fs_long((long) sa->sa_restorer,tmp_esp++); + put_fs_long(signr,tmp_esp++); + if (!(sa->sa_flags & SA_NOMASK)) + put_fs_long(current->blocked,tmp_esp++); + put_fs_long(eax,tmp_esp++); + put_fs_long(ecx,tmp_esp++); + put_fs_long(edx,tmp_esp++); + put_fs_long(eflags,tmp_esp++); + put_fs_long(old_eip,tmp_esp++); + current->blocked |= sa->sa_mask; +} diff --git a/os/os/linux/kernel/signal.o b/os/os/linux/kernel/signal.o new file mode 100644 index 0000000..1970f39 Binary files /dev/null and b/os/os/linux/kernel/signal.o differ diff --git a/os/os/linux/kernel/sys.c b/os/os/linux/kernel/sys.c new file mode 100644 index 0000000..3069d63 --- /dev/null +++ b/os/os/linux/kernel/sys.c @@ -0,0 +1,299 @@ +/* + * linux/kernel/sys.c + * + * (C) 1991 Linus Torvalds + */ +#define SIGALRM 14 +#include +#include +#include +#include +#include +#include +#include + +int sys_ftime() +{ + return -ENOSYS; +} + +int sys_break() +{ + return -ENOSYS; +} + +int sys_ptrace() +{ + return -ENOSYS; +} + +int sys_stty() +{ + return -ENOSYS; +} + +int sys_gtty() +{ + return -ENOSYS; +} + +int sys_rename() +{ + return -ENOSYS; +} + +int sys_prof() +{ + return -ENOSYS; +} + +int sys_setregid(int rgid, int egid) +{ + if (rgid>0) { + if ((current->gid == rgid) || + suser()) + current->gid = rgid; + else + return(-EPERM); + } + if (egid>0) { + if ((current->gid == egid) || + (current->egid == egid) || + suser()) { + current->egid = egid; + current->sgid = egid; + } else + return(-EPERM); + } + return 0; +} + +int sys_setgid(int gid) +{ +/* return(sys_setregid(gid, gid)); */ + if (suser()) + current->gid = current->egid = current->sgid = gid; + else if ((gid == current->gid) || (gid == current->sgid)) + current->egid = gid; + else + return -EPERM; + return 0; +} + +int sys_acct() +{ + return -ENOSYS; +} + +int sys_phys() +{ + return -ENOSYS; +} + +int sys_lock() +{ + return -ENOSYS; +} + +int sys_mpx() +{ + return -ENOSYS; +} + +int sys_ulimit() +{ + return -ENOSYS; +} + +int sys_time(long * tloc) +{ + int i; + + i = CURRENT_TIME; + if (tloc) { + verify_area(tloc,4); + put_fs_long(i,(unsigned long *)tloc); + } + return i; +} + +/* + * Unprivileged users may change the real user id to the effective uid + * or vice versa. + */ +int sys_setreuid(int ruid, int euid) +{ + int old_ruid = current->uid; + + if (ruid>0) { + if ((current->euid==ruid) || + (old_ruid == ruid) || + suser()) + current->uid = ruid; + else + return(-EPERM); + } + if (euid>0) { + if ((old_ruid == euid) || + (current->euid == euid) || + suser()) { + current->euid = euid; + current->suid = euid; + } else { + current->uid = old_ruid; + return(-EPERM); + } + } + return 0; +} + +int sys_setuid(int uid) +{ +/* return(sys_setreuid(uid, uid)); */ + if (suser()) + current->uid = current->euid = current->suid = uid; + else if ((uid == current->uid) || (uid == current->suid)) + current->euid = uid; + else + return -EPERM; + return(0); +} + +int sys_stime(long * tptr) +{ + if (!suser()) + return -EPERM; + startup_time = get_fs_long((unsigned long *)tptr) - jiffies/HZ; + return 0; +} + +int sys_times(struct tms * tbuf) +{ + if (tbuf) { + verify_area(tbuf,sizeof *tbuf); + put_fs_long(current->utime,(unsigned long *)&tbuf->tms_utime); + put_fs_long(current->stime,(unsigned long *)&tbuf->tms_stime); + put_fs_long(current->cutime,(unsigned long *)&tbuf->tms_cutime); + put_fs_long(current->cstime,(unsigned long *)&tbuf->tms_cstime); + } + return jiffies; +} + +int sys_brk(unsigned long end_data_seg) +{ + if (end_data_seg >= current->end_code && + end_data_seg < current->start_stack - 16384) + current->brk = end_data_seg; + return current->brk; +} + +/* + * This needs some heave checking ... + * I just haven't get the stomach for it. I also don't fully + * understand sessions/pgrp etc. Let somebody who does explain it. + */ +int sys_setpgid(int pid, int pgid) +{ + int i; + + if (!pid) + pid = current->pid; + if (!pgid) + pgid = current->pid; + for (i=0 ; ipid==pid) { + if (task[i]->leader) + return -EPERM; + if (task[i]->session != current->session) + return -EPERM; + task[i]->pgrp = pgid; + return 0; + } + return -ESRCH; +} + +int sys_getpgrp(void) +{ + return current->pgrp; +} + +int sys_setsid(void) +{ + if (current->leader && !suser()) + return -EPERM; + current->leader = 1; + current->session = current->pgrp = current->pid; + current->tty = -1; + return current->pgrp; +} + +int sys_getgroups() +{ + return -ENOSYS; +} + +int sys_setgroups() +{ + return -ENOSYS; +} + +int sys_uname(struct utsname * name) +{ + static struct utsname thisname = { + "linux .0","nodename","release ","version ","machine " + }; + int i; + + if (!name) return -ERROR; + verify_area(name,sizeof *name); + for(i=0;iumask; + + current->umask = mask & 0777; + return (old); +} + +int sys_sleep(unsigned int seconds) +{ + sys_signal(SIGALRM,SIG_IGN,NULL); + sys_alarm(seconds); + sys_pause(); + return 0; +} diff --git a/os/os/linux/kernel/sys.o b/os/os/linux/kernel/sys.o new file mode 100644 index 0000000..dfa95fe Binary files /dev/null and b/os/os/linux/kernel/sys.o differ diff --git a/os/os/linux/kernel/system_call.o b/os/os/linux/kernel/system_call.o new file mode 100644 index 0000000..7f18738 Binary files /dev/null and b/os/os/linux/kernel/system_call.o differ diff --git a/os/os/linux/kernel/system_call.s b/os/os/linux/kernel/system_call.s new file mode 100644 index 0000000..7872a77 --- /dev/null +++ b/os/os/linux/kernel/system_call.s @@ -0,0 +1,298 @@ +/* + * linux/kernel/system_call.s + * + * (C) 1991 Linus Torvalds + */ + +/* + * system_call.s contains the system-call low-level handling routines. + * This also contains the timer-interrupt handler, as some of the code is + * the same. The hd- and flopppy-interrupts are also here. + * + * NOTE: This code handles signal-recognition, which happens every time + * after a timer-interrupt and after each system call. Ordinary interrupts + * don't handle signal-recognition, as that would clutter them up totally + * unnecessarily. + * + * Stack layout in 'ret_from_system_call': + * + * 0(%esp) - %eax + * 4(%esp) - %ebx + * 8(%esp) - %ecx + * C(%esp) - %edx + * 10(%esp) - %fs + * 14(%esp) - %es + * 18(%esp) - %ds + * 1C(%esp) - %eip + * 20(%esp) - %cs + * 24(%esp) - %eflags + * 28(%esp) - %oldesp + * 2C(%esp) - %oldss + */ + +SIG_CHLD = 17 + +EAX = 0x00 +EBX = 0x04 +ECX = 0x08 +EDX = 0x0C +FS = 0x10 +ES = 0x14 +DS = 0x18 +EIP = 0x1C +CS = 0x20 +EFLAGS = 0x24 +OLDESP = 0x28 +OLDSS = 0x2C + +state = 0 # these are offsets into the task-struct. +counter = 4 +priority = 8 +signal = 12 +sigaction = 16 # MUST be 16 (=len of sigaction) +blocked = (33*16) + +# offsets within sigaction +sa_handler = 0 +sa_mask = 4 +sa_flags = 8 +sa_restorer = 12 + +nr_system_calls = 92 /* 72 */ + +/* + * Ok, I get parallel printer interrupts while using the floppy for some + * strange reason. Urgel. Now I just ignore them. + */ +.globl system_call,sys_fork,timer_interrupt,sys_execve,sys_execve2 +.globl hd_interrupt,floppy_interrupt,parallel_interrupt +.globl device_not_available, coprocessor_error + +.align 4 +bad_sys_call: + movl $-1,%eax + iret +.align 4 +reschedule: + pushl $ret_from_sys_call + jmp schedule +.align 4 +system_call: + cmpl $nr_system_calls-1,%eax + ja bad_sys_call + push %ds + push %es + push %fs + pushl %edx + pushl %ecx # push %ebx,%ecx,%edx as parameters + pushl %ebx # to the system call + movl $0x10,%edx # set up ds,es to kernel space + mov %dx,%ds + mov %dx,%es + movl $0x17,%edx # fs points to local data space + mov %dx,%fs + + pushl %eax #by wyj + call print_nr + popl %eax + + call sys_call_table(,%eax,4) + pushl %eax + movl current,%eax + cmpl $0,state(%eax) # state + jne reschedule + cmpl $0,counter(%eax) # counter + je reschedule +ret_from_sys_call: + movl current,%eax # task[0] cannot have signals + cmpl task,%eax + je 3f + cmpw $0x0f,CS(%esp) # was old code segment supervisor ? + jne 3f + cmpw $0x17,OLDSS(%esp) # was stack segment = 0x17 ? + jne 3f + movl signal(%eax),%ebx + movl blocked(%eax),%ecx + notl %ecx + andl %ebx,%ecx + bsfl %ecx,%ecx + je 3f + btrl %ecx,%ebx + movl %ebx,signal(%eax) + incl %ecx + pushl %ecx + call do_signal + popl %eax +3: popl %eax + popl %ebx + popl %ecx + popl %edx + pop %fs + pop %es + pop %ds + iret + +.align 4 +coprocessor_error: + push %ds + push %es + push %fs + pushl %edx + pushl %ecx + pushl %ebx + pushl %eax + movl $0x10,%eax + mov %ax,%ds + mov %ax,%es + movl $0x17,%eax + mov %ax,%fs + pushl $ret_from_sys_call + jmp math_error + +.align 2 +device_not_available: + push %ds + push %es + push %fs + pushl %edx + pushl %ecx + pushl %ebx + pushl %eax + movl $0x10,%eax + mov %ax,%ds + mov %ax,%es + movl $0x17,%eax + mov %ax,%fs + pushl $ret_from_sys_call + clts # clear TS so that we can use math + movl %cr0,%eax + testl $0x4,%eax # EM (math emulation bit) + je math_state_restore + pushl %ebp + pushl %esi + pushl %edi + call math_emulate + popl %edi + popl %esi + popl %ebp + ret + +.align 4 +timer_interrupt: + push %ds # save ds,es and put kernel data space + push %es # into them. %fs is used by _system_call + push %fs + pushl %edx # we save %eax,%ecx,%edx as gcc doesn't + pushl %ecx # save those across function calls. %ebx + pushl %ebx # is saved as we use that in ret_sys_call + pushl %eax + movl $0x10,%eax + mov %ax,%ds + mov %ax,%es + movl $0x17,%eax + mov %ax,%fs + incl jiffies + movb $0x20,%al # EOI to interrupt controller #1 + outb %al,$0x20 + movl CS(%esp),%eax + andl $3,%eax # %eax is CPL (0 or 3, 0=supervisor) + pushl %eax + call do_timer # 'do_timer(long CPL)' does everything from + addl $4,%esp # task switching to accounting ... + jmp ret_from_sys_call + +.align 4 +sys_execve: + lea EIP(%esp),%eax + pushl %eax + call do_execve + addl $4,%esp + ret + +.align 4 +sys_execve2: + lea EIP(%esp),%eax + pushl %eax + call do_execve2 + addl $4,%esp + ret + +.align 4 +sys_fork: + call find_empty_process + testl %eax,%eax + js 1f + push %gs + pushl %esi + pushl %edi + pushl %ebp + pushl %eax + call copy_process + addl $20,%esp +1: ret + +hd_interrupt: + pushl %eax + pushl %ecx + pushl %edx + push %ds + push %es + push %fs + movl $0x10,%eax + mov %ax,%ds + mov %ax,%es + movl $0x17,%eax + mov %ax,%fs + movb $0x20,%al + outb %al,$0xA0 # EOI to interrupt controller #1 + jmp 1f # give port chance to breathe +1: jmp 1f +1: xorl %edx,%edx + xchgl do_hd,%edx + testl %edx,%edx + jne 1f + movl $unexpected_hd_interrupt,%edx +1: outb %al,$0x20 + call *%edx # "interesting" way of handling intr. + pop %fs + pop %es + pop %ds + popl %edx + popl %ecx + popl %eax + iret + +floppy_interrupt: + pushl %eax + pushl %ecx + pushl %edx + push %ds + push %es + push %fs + movl $0x10,%eax + mov %ax,%ds + mov %ax,%es + movl $0x17,%eax + mov %ax,%fs + movb $0x20,%al + outb %al,$0x20 # EOI to interrupt controller #1 + xorl %eax,%eax + xchgl do_floppy,%eax + testl %eax,%eax + jne 1f + movl $unexpected_floppy_interrupt,%eax +1: call *%eax # "interesting" way of handling intr. + pop %fs + pop %es + pop %ds + popl %edx + popl %ecx + popl %eax + iret + +parallel_interrupt: + pushl %eax + movb $0x20,%al + outb %al,$0x20 + popl %eax + iret diff --git a/os/os/linux/kernel/traps.c b/os/os/linux/kernel/traps.c new file mode 100644 index 0000000..f9bd8f1 --- /dev/null +++ b/os/os/linux/kernel/traps.c @@ -0,0 +1,208 @@ +/* + * linux/kernel/traps.c + * + * (C) 1991 Linus Torvalds + */ + +/* + * 'Traps.c' handles hardware traps and faults after we have saved some + * state in 'asm.s'. Currently mostly a debugging-aid, will be extended + * to mainly kill the offending process (probably by giving it a signal, + * but possibly by killing it outright if necessary). + */ +#include + +#include +#include +#include +#include +#include +#include + +#define get_seg_byte(seg,addr) ({ \ +register char __res; \ +__asm__("push %%fs;mov %%ax,%%fs;movb %%fs:%2,%%al;pop %%fs" \ + :"=a" (__res):"0" (seg),"m" (*(addr))); \ +__res;}) + +#define get_seg_long(seg,addr) ({ \ +register unsigned long __res; \ +__asm__("push %%fs;mov %%ax,%%fs;movl %%fs:%2,%%eax;pop %%fs" \ + :"=a" (__res):"0" (seg),"m" (*(addr))); \ +__res;}) + +#define _fs() ({ \ +register unsigned short __res; \ +__asm__("mov %%fs,%%ax":"=a" (__res):); \ +__res;}) + +int do_exit(long code); + +void page_exception(void); + +void divide_error(void); +void debug(void); +void nmi(void); +void int3(void); +void overflow(void); +void bounds(void); +void invalid_op(void); +void device_not_available(void); +void double_fault(void); +void coprocessor_segment_overrun(void); +void invalid_TSS(void); +void segment_not_present(void); +void stack_segment(void); +void general_protection(void); +void page_fault(void); +void coprocessor_error(void); +void reserved(void); +void parallel_interrupt(void); +void irq13(void); + +static void die(char * str,long esp_ptr,long nr) +{ + long * esp = (long *) esp_ptr; + int i; + + printk("%s: %04x\n\r",str,nr&0xffff); + printk("EIP:\t%04x:%p\nEFLAGS:\t%p\nESP:\t%04x:%p\n", + esp[1],esp[0],esp[2],esp[4],esp[3]); + printk("fs: %04x\n",_fs()); + printk("base: %p, limit: %p\n",get_base(current->ldt[1]),get_limit(0x17)); + if (esp[4] == 0x17) { + printk("Stack: "); + for (i=0;i<4;i++) + printk("%p ",get_seg_long(0x17,i+(long *)esp[3])); + printk("\n"); + } + str(i); + printk("Pid: %d, process nr: %d\n\r",current->pid,0xffff & i); + for(i=0;i<10;i++) + printk("%02x ",0xff & get_seg_byte(esp[1],(i+(char *)esp[0]))); + printk("\n\r"); + do_exit(11); /* play segment exception */ +} + +void do_double_fault(long esp, long error_code) +{ + die("double fault",esp,error_code); +} + +void do_general_protection(long esp, long error_code) +{ + die("general protection",esp,error_code); +} + +void do_divide_error(long esp, long error_code) +{ + die("divide error",esp,error_code); +} + +void do_int3(long * esp, long error_code, + long fs,long es,long ds, + long ebp,long esi,long edi, + long edx,long ecx,long ebx,long eax) +{ + int tr; + + __asm__("str %%ax":"=a" (tr):"0" (0)); + printk("eax\t\tebx\t\tecx\t\tedx\n\r%8x\t%8x\t%8x\t%8x\n\r", + eax,ebx,ecx,edx); + printk("esi\t\tedi\t\tebp\t\tesp\n\r%8x\t%8x\t%8x\t%8x\n\r", + esi,edi,ebp,(long) esp); + printk("\n\rds\tes\tfs\ttr\n\r%4x\t%4x\t%4x\t%4x\n\r", + ds,es,fs,tr); + printk("EIP: %8x CS: %4x EFLAGS: %8x\n\r",esp[0],esp[1],esp[2]); +} + +void do_nmi(long esp, long error_code) +{ + die("nmi",esp,error_code); +} + +void do_debug(long esp, long error_code) +{ + die("debug",esp,error_code); +} + +void do_overflow(long esp, long error_code) +{ + die("overflow",esp,error_code); +} + +void do_bounds(long esp, long error_code) +{ + die("bounds",esp,error_code); +} + +void do_invalid_op(long esp, long error_code) +{ + die("invalid operand",esp,error_code); +} + +void do_device_not_available(long esp, long error_code) +{ + die("device not available",esp,error_code); +} + +void do_coprocessor_segment_overrun(long esp, long error_code) +{ + die("coprocessor segment overrun",esp,error_code); +} + +void do_invalid_TSS(long esp,long error_code) +{ + die("invalid TSS",esp,error_code); +} + +void do_segment_not_present(long esp,long error_code) +{ + die("segment not present",esp,error_code); +} + +void do_stack_segment(long esp,long error_code) +{ + die("stack segment",esp,error_code); +} + +void do_coprocessor_error(long esp, long error_code) +{ + if (last_task_used_math != current) + return; + die("coprocessor error",esp,error_code); +} + +void do_reserved(long esp, long error_code) +{ + die("reserved (15,17-47) error",esp,error_code); +} + +void trap_init(void) +{ + int i; + + set_trap_gate(0,÷_error); + set_trap_gate(1,&debug); + set_trap_gate(2,&nmi); + set_system_gate(3,&int3); /* int3-5 can be called from all */ + set_system_gate(4,&overflow); + set_system_gate(5,&bounds); + set_trap_gate(6,&invalid_op); + set_trap_gate(7,&device_not_available); + set_trap_gate(8,&double_fault); + set_trap_gate(9,&coprocessor_segment_overrun); + set_trap_gate(10,&invalid_TSS); + set_trap_gate(11,&segment_not_present); + set_trap_gate(12,&stack_segment); + set_trap_gate(13,&general_protection); + set_trap_gate(14,&page_fault); + set_trap_gate(15,&reserved); + set_trap_gate(16,&coprocessor_error); + for (i=17;i<48;i++) + set_trap_gate(i,&reserved); + set_trap_gate(45,&irq13); + outb_p(inb_p(0x21)&0xfb,0x21); + outb(inb_p(0xA1)&0xdf,0xA1); + set_trap_gate(39,¶llel_interrupt); +} diff --git a/os/os/linux/kernel/traps.o b/os/os/linux/kernel/traps.o new file mode 100644 index 0000000..51de46f Binary files /dev/null and b/os/os/linux/kernel/traps.o differ diff --git a/os/os/linux/kernel/vsprintf.c b/os/os/linux/kernel/vsprintf.c new file mode 100644 index 0000000..06b910e --- /dev/null +++ b/os/os/linux/kernel/vsprintf.c @@ -0,0 +1,233 @@ +/* + * linux/kernel/vsprintf.c + * + * (C) 1991 Linus Torvalds + */ + +/* vsprintf.c -- Lars Wirzenius & Linus Torvalds. */ +/* + * Wirzenius wrote this portably, Torvalds fucked it up :-) + */ + +#include +#include + +/* we use this so that we can do without the ctype library */ +#define is_digit(c) ((c) >= '0' && (c) <= '9') + +static int skip_atoi(const char **s) +{ + int i=0; + + while (is_digit(**s)) + i = i*10 + *((*s)++) - '0'; + return i; +} + +#define ZEROPAD 1 /* pad with zero */ +#define SIGN 2 /* unsigned/signed long */ +#define PLUS 4 /* show plus */ +#define SPACE 8 /* space if plus */ +#define LEFT 16 /* left justified */ +#define SPECIAL 32 /* 0x */ +#define SMALL 64 /* use 'abcdef' instead of 'ABCDEF' */ + +#define do_div(n,base) ({ \ +int __res; \ +__asm__("divl %4":"=a" (n),"=d" (__res):"0" (n),"1" (0),"r" (base)); \ +__res; }) + +static char * number(char * str, int num, int base, int size, int precision + ,int type) +{ + char c,sign,tmp[36]; + const char *digits="0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"; + int i; + + if (type&SMALL) digits="0123456789abcdefghijklmnopqrstuvwxyz"; + if (type&LEFT) type &= ~ZEROPAD; + if (base<2 || base>36) + return 0; + c = (type & ZEROPAD) ? '0' : ' ' ; + if (type&SIGN && num<0) { + sign='-'; + num = -num; + } else + sign=(type&PLUS) ? '+' : ((type&SPACE) ? ' ' : 0); + if (sign) size--; + if (type&SPECIAL) + if (base==16) size -= 2; + else if (base==8) size--; + i=0; + if (num==0) + tmp[i++]='0'; + else while (num!=0) + tmp[i++]=digits[do_div(num,base)]; + if (i>precision) precision=i; + size -= precision; + if (!(type&(ZEROPAD+LEFT))) + while(size-->0) + *str++ = ' '; + if (sign) + *str++ = sign; + if (type&SPECIAL) + if (base==8) + *str++ = '0'; + else if (base==16) { + *str++ = '0'; + *str++ = digits[33]; + } + if (!(type&LEFT)) + while(size-->0) + *str++ = c; + while(i0) + *str++ = tmp[i]; + while(size-->0) + *str++ = ' '; + return str; +} + +int vsprintf(char *buf, const char *fmt, va_list args) +{ + int len; + int i; + char * str; + char *s; + int *ip; + + int flags; /* flags to number() */ + + int field_width; /* width of output field */ + int precision; /* min. # of digits for integers; max + number of chars for from string */ + int qualifier; /* 'h', 'l', or 'L' for integer fields */ + + for (str=buf ; *fmt ; ++fmt) { + if (*fmt != '%') { + *str++ = *fmt; + continue; + } + + /* process flags */ + flags = 0; + repeat: + ++fmt; /* this also skips first '%' */ + switch (*fmt) { + case '-': flags |= LEFT; goto repeat; + case '+': flags |= PLUS; goto repeat; + case ' ': flags |= SPACE; goto repeat; + case '#': flags |= SPECIAL; goto repeat; + case '0': flags |= ZEROPAD; goto repeat; + } + + /* get field width */ + field_width = -1; + if (is_digit(*fmt)) + field_width = skip_atoi(&fmt); + else if (*fmt == '*') { + /* it's the next argument */ + field_width = va_arg(args, int); + if (field_width < 0) { + field_width = -field_width; + flags |= LEFT; + } + } + + /* get the precision */ + precision = -1; + if (*fmt == '.') { + ++fmt; + if (is_digit(*fmt)) + precision = skip_atoi(&fmt); + else if (*fmt == '*') { + /* it's the next argument */ + precision = va_arg(args, int); + } + if (precision < 0) + precision = 0; + } + + /* get the conversion qualifier */ + qualifier = -1; + if (*fmt == 'h' || *fmt == 'l' || *fmt == 'L') { + qualifier = *fmt; + ++fmt; + } + + switch (*fmt) { + case 'c': + if (!(flags & LEFT)) + while (--field_width > 0) + *str++ = ' '; + *str++ = (unsigned char) va_arg(args, int); + while (--field_width > 0) + *str++ = ' '; + break; + + case 's': + s = va_arg(args, char *); + len = strlen(s); + if (precision < 0) + precision = len; + else if (len > precision) + len = precision; + + if (!(flags & LEFT)) + while (len < field_width--) + *str++ = ' '; + for (i = 0; i < len; ++i) + *str++ = *s++; + while (len < field_width--) + *str++ = ' '; + break; + + case 'o': + str = number(str, va_arg(args, unsigned long), 8, + field_width, precision, flags); + break; + + case 'p': + if (field_width == -1) { + field_width = 8; + flags |= ZEROPAD; + } + str = number(str, + (unsigned long) va_arg(args, void *), 16, + field_width, precision, flags); + break; + + case 'x': + flags |= SMALL; + case 'X': + str = number(str, va_arg(args, unsigned long), 16, + field_width, precision, flags); + break; + + case 'd': + case 'i': + flags |= SIGN; + case 'u': + str = number(str, va_arg(args, unsigned long), 10, + field_width, precision, flags); + break; + + case 'n': + ip = va_arg(args, int *); + *ip = (str - buf); + break; + + default: + if (*fmt != '%') + *str++ = '%'; + if (*fmt) + *str++ = *fmt; + else + --fmt; + break; + } + } + *str = '\0'; + return str-buf; +} diff --git a/os/os/linux/kernel/vsprintf.o b/os/os/linux/kernel/vsprintf.o new file mode 100644 index 0000000..5acfe65 Binary files /dev/null and b/os/os/linux/kernel/vsprintf.o differ diff --git a/os/os/linux/lib/Makefile b/os/os/linux/lib/Makefile new file mode 100644 index 0000000..608faf5 --- /dev/null +++ b/os/os/linux/lib/Makefile @@ -0,0 +1,73 @@ +# +# Makefile for some libs needed in the kernel. +# +# Note! Dependencies are done automagically by 'make dep', which also +# removes any old dependencies. DON'T put your own dependencies here +# unless it's something special (ie not a .c file). +# + +AR =ar +AS =as +LD =ld +LDFLAGS =-s -x +CC =gcc -march=i386 +CFLAGS =-w -g -fstrength-reduce -fomit-frame-pointer \ + -finline-functions -nostdinc -fno-stack-protector -I../include +CPP =gcc -E -nostdinc -I../include + +.c.s: + $(CC) $(CFLAGS) \ + -S -o $*.s $< +.s.o: + $(AS) -o $*.o $< +.c.o: + $(CC) $(CFLAGS) \ + -c -o $*.o $< + +OBJS = ctype.o _exit.o open.o close.o errno.o write.o dup.o setsid.o \ + execve.o wait.o string.o malloc.o + +lib.a: $(OBJS) + $(AR) rcs lib.a $(OBJS) + sync + +clean: + rm -f core *.o *.a tmp_make + for i in *.c;do rm -f `basename $$i .c`.s;done + +dep: + sed '/\#\#\# Dependencies/q' < Makefile > tmp_make + (for i in *.c;do echo -n `echo $$i | sed 's,\.c,\.s,'`" "; \ + $(CPP) -M $$i;done) >> tmp_make + cp tmp_make Makefile + +### Dependencies: +_exit.s _exit.o : _exit.c ../include/unistd.h ../include/sys/stat.h \ + ../include/sys/types.h ../include/sys/times.h ../include/sys/utsname.h \ + ../include/utime.h +close.s close.o : close.c ../include/unistd.h ../include/sys/stat.h \ + ../include/sys/types.h ../include/sys/times.h ../include/sys/utsname.h \ + ../include/utime.h +ctype.s ctype.o : ctype.c ../include/ctype.h +dup.s dup.o : dup.c ../include/unistd.h ../include/sys/stat.h \ + ../include/sys/types.h ../include/sys/times.h ../include/sys/utsname.h \ + ../include/utime.h +errno.s errno.o : errno.c +execve.s execve.o : execve.c ../include/unistd.h ../include/sys/stat.h \ + ../include/sys/types.h ../include/sys/times.h ../include/sys/utsname.h \ + ../include/utime.h +malloc.s malloc.o : malloc.c ../include/linux/kernel.h ../include/linux/mm.h \ + ../include/asm/system.h +open.s open.o : open.c ../include/unistd.h ../include/sys/stat.h \ + ../include/sys/types.h ../include/sys/times.h ../include/sys/utsname.h \ + ../include/utime.h ../include/stdarg.h +setsid.s setsid.o : setsid.c ../include/unistd.h ../include/sys/stat.h \ + ../include/sys/types.h ../include/sys/times.h ../include/sys/utsname.h \ + ../include/utime.h +string.s string.o : string.c ../include/string.h +wait.s wait.o : wait.c ../include/unistd.h ../include/sys/stat.h \ + ../include/sys/types.h ../include/sys/times.h ../include/sys/utsname.h \ + ../include/utime.h ../include/sys/wait.h +write.s write.o : write.c ../include/unistd.h ../include/sys/stat.h \ + ../include/sys/types.h ../include/sys/times.h ../include/sys/utsname.h \ + ../include/utime.h diff --git a/os/os/linux/lib/_exit.c b/os/os/linux/lib/_exit.c new file mode 100644 index 0000000..c0c9d69 --- /dev/null +++ b/os/os/linux/lib/_exit.c @@ -0,0 +1,13 @@ +/* + * linux/lib/_exit.c + * + * (C) 1991 Linus Torvalds + */ + +#define __LIBRARY__ +#include + +volatile void _exit(int exit_code) +{ + __asm__("int $0x80"::"a" (__NR_exit),"b" (exit_code)); +} diff --git a/os/os/linux/lib/_exit.o b/os/os/linux/lib/_exit.o new file mode 100644 index 0000000..3941812 Binary files /dev/null and b/os/os/linux/lib/_exit.o differ diff --git a/os/os/linux/lib/close.c b/os/os/linux/lib/close.c new file mode 100644 index 0000000..afd8364 --- /dev/null +++ b/os/os/linux/lib/close.c @@ -0,0 +1,10 @@ +/* + * linux/lib/close.c + * + * (C) 1991 Linus Torvalds + */ + +#define __LIBRARY__ +#include + +_syscall1(int,close,int,fd) diff --git a/os/os/linux/lib/close.o b/os/os/linux/lib/close.o new file mode 100644 index 0000000..4c8ffdc Binary files /dev/null and b/os/os/linux/lib/close.o differ diff --git a/os/os/linux/lib/ctype.c b/os/os/linux/lib/ctype.c new file mode 100644 index 0000000..877e629 --- /dev/null +++ b/os/os/linux/lib/ctype.c @@ -0,0 +1,35 @@ +/* + * linux/lib/ctype.c + * + * (C) 1991 Linus Torvalds + */ + +#include + +char _ctmp; +unsigned char _ctype[] = {0x00, /* EOF */ +_C,_C,_C,_C,_C,_C,_C,_C, /* 0-7 */ +_C,_C|_S,_C|_S,_C|_S,_C|_S,_C|_S,_C,_C, /* 8-15 */ +_C,_C,_C,_C,_C,_C,_C,_C, /* 16-23 */ +_C,_C,_C,_C,_C,_C,_C,_C, /* 24-31 */ +_S|_SP,_P,_P,_P,_P,_P,_P,_P, /* 32-39 */ +_P,_P,_P,_P,_P,_P,_P,_P, /* 40-47 */ +_D,_D,_D,_D,_D,_D,_D,_D, /* 48-55 */ +_D,_D,_P,_P,_P,_P,_P,_P, /* 56-63 */ +_P,_U|_X,_U|_X,_U|_X,_U|_X,_U|_X,_U|_X,_U, /* 64-71 */ +_U,_U,_U,_U,_U,_U,_U,_U, /* 72-79 */ +_U,_U,_U,_U,_U,_U,_U,_U, /* 80-87 */ +_U,_U,_U,_P,_P,_P,_P,_P, /* 88-95 */ +_P,_L|_X,_L|_X,_L|_X,_L|_X,_L|_X,_L|_X,_L, /* 96-103 */ +_L,_L,_L,_L,_L,_L,_L,_L, /* 104-111 */ +_L,_L,_L,_L,_L,_L,_L,_L, /* 112-119 */ +_L,_L,_L,_P,_P,_P,_P,_C, /* 120-127 */ +0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 128-143 */ +0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 144-159 */ +0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 160-175 */ +0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 176-191 */ +0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 192-207 */ +0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 208-223 */ +0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 224-239 */ +0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}; /* 240-255 */ + diff --git a/os/os/linux/lib/ctype.o b/os/os/linux/lib/ctype.o new file mode 100644 index 0000000..acd65e6 Binary files /dev/null and b/os/os/linux/lib/ctype.o differ diff --git a/os/os/linux/lib/dup.c b/os/os/linux/lib/dup.c new file mode 100644 index 0000000..dd13414 --- /dev/null +++ b/os/os/linux/lib/dup.c @@ -0,0 +1,10 @@ +/* + * linux/lib/dup.c + * + * (C) 1991 Linus Torvalds + */ + +#define __LIBRARY__ +#include + +_syscall1(int,dup,int,fd) diff --git a/os/os/linux/lib/dup.o b/os/os/linux/lib/dup.o new file mode 100644 index 0000000..a354c34 Binary files /dev/null and b/os/os/linux/lib/dup.o differ diff --git a/os/os/linux/lib/errno.c b/os/os/linux/lib/errno.c new file mode 100644 index 0000000..50aca2e --- /dev/null +++ b/os/os/linux/lib/errno.c @@ -0,0 +1,7 @@ +/* + * linux/lib/errno.c + * + * (C) 1991 Linus Torvalds + */ + +int errno; diff --git a/os/os/linux/lib/errno.o b/os/os/linux/lib/errno.o new file mode 100644 index 0000000..2b68237 Binary files /dev/null and b/os/os/linux/lib/errno.o differ diff --git a/os/os/linux/lib/execve.c b/os/os/linux/lib/execve.c new file mode 100644 index 0000000..a89726d --- /dev/null +++ b/os/os/linux/lib/execve.c @@ -0,0 +1,10 @@ +/* + * linux/lib/execve.c + * + * (C) 1991 Linus Torvalds + */ + +#define __LIBRARY__ +#include + +_syscall3(int,execve,const char *,file,char **,argv,char **,envp) diff --git a/os/os/linux/lib/execve.o b/os/os/linux/lib/execve.o new file mode 100644 index 0000000..00b88ef Binary files /dev/null and b/os/os/linux/lib/execve.o differ diff --git a/os/os/linux/lib/lib.a b/os/os/linux/lib/lib.a new file mode 100644 index 0000000..870d90a Binary files /dev/null and b/os/os/linux/lib/lib.a differ diff --git a/os/os/linux/lib/malloc.c b/os/os/linux/lib/malloc.c new file mode 100644 index 0000000..d7c95d5 --- /dev/null +++ b/os/os/linux/lib/malloc.c @@ -0,0 +1,232 @@ +/* + * malloc.c --- a general purpose kernel memory allocator for Linux. + * + * Written by Theodore Ts'o (tytso@mit.edu), 11/29/91 + * + * This routine is written to be as fast as possible, so that it + * can be called from the interrupt level. + * + * Limitations: maximum size of memory we can allocate using this routine + * is 4k, the size of a page in Linux. + * + * The general game plan is that each page (called a bucket) will only hold + * objects of a given size. When all of the object on a page are released, + * the page can be returned to the general free pool. When malloc() is + * called, it looks for the smallest bucket size which will fulfill its + * request, and allocate a piece of memory from that bucket pool. + * + * Each bucket has as its control block a bucket descriptor which keeps + * track of how many objects are in use on that page, and the free list + * for that page. Like the buckets themselves, bucket descriptors are + * stored on pages requested from get_free_page(). However, unlike buckets, + * pages devoted to bucket descriptor pages are never released back to the + * system. Fortunately, a system should probably only need 1 or 2 bucket + * descriptor pages, since a page can hold 256 bucket descriptors (which + * corresponds to 1 megabyte worth of bucket pages.) If the kernel is using + * that much allocated memory, it's probably doing something wrong. :-) + * + * Note: malloc() and free() both call get_free_page() and free_page() + * in sections of code where interrupts are turned off, to allow + * malloc() and free() to be safely called from an interrupt routine. + * (We will probably need this functionality when networking code, + * particularily things like NFS, is added to Linux.) However, this + * presumes that get_free_page() and free_page() are interrupt-level + * safe, which they may not be once paging is added. If this is the + * case, we will need to modify malloc() to keep a few unused pages + * "pre-allocated" so that it can safely draw upon those pages if + * it is called from an interrupt routine. + * + * Another concern is that get_free_page() should not sleep; if it + * does, the code is carefully ordered so as to avoid any race + * conditions. The catch is that if malloc() is called re-entrantly, + * there is a chance that unecessary pages will be grabbed from the + * system. Except for the pages for the bucket descriptor page, the + * extra pages will eventually get released back to the system, though, + * so it isn't all that bad. + */ + +#include +#include +#include + +struct bucket_desc { /* 16 bytes */ + void *page; + struct bucket_desc *next; + void *freeptr; + unsigned short refcnt; + unsigned short bucket_size; +}; + +struct _bucket_dir { /* 8 bytes */ + int size; + struct bucket_desc *chain; +}; + +/* + * The following is the where we store a pointer to the first bucket + * descriptor for a given size. + * + * If it turns out that the Linux kernel allocates a lot of objects of a + * specific size, then we may want to add that specific size to this list, + * since that will allow the memory to be allocated more efficiently. + * However, since an entire page must be dedicated to each specific size + * on this list, some amount of temperance must be exercised here. + * + * Note that this list *must* be kept in order. + */ +struct _bucket_dir bucket_dir[] = { + { 16, (struct bucket_desc *) 0}, + { 32, (struct bucket_desc *) 0}, + { 64, (struct bucket_desc *) 0}, + { 128, (struct bucket_desc *) 0}, + { 256, (struct bucket_desc *) 0}, + { 512, (struct bucket_desc *) 0}, + { 1024, (struct bucket_desc *) 0}, + { 2048, (struct bucket_desc *) 0}, + { 4096, (struct bucket_desc *) 0}, + { 0, (struct bucket_desc *) 0}}; /* End of list marker */ + +/* + * This contains a linked list of free bucket descriptor blocks + */ +struct bucket_desc *free_bucket_desc = (struct bucket_desc *) 0; + +/* + * This routine initializes a bucket description page. + */ +static inline void init_bucket_desc() +{ + struct bucket_desc *bdesc, *first; + int i; + + first = bdesc = (struct bucket_desc *) get_free_page(); + if (!bdesc) + panic("Out of memory in init_bucket_desc()"); + for (i = PAGE_SIZE/sizeof(struct bucket_desc); i > 1; i--) { + bdesc->next = bdesc+1; + bdesc++; + } + /* + * This is done last, to avoid race conditions in case + * get_free_page() sleeps and this routine gets called again.... + */ + bdesc->next = free_bucket_desc; + free_bucket_desc = first; +} + +void *malloc(unsigned int len) +{ + struct _bucket_dir *bdir; + struct bucket_desc *bdesc; + void *retval; + + /* + * First we search the bucket_dir to find the right bucket change + * for this request. + */ + for (bdir = bucket_dir; bdir->size; bdir++) + if (bdir->size >= len) + break; + if (!bdir->size) { + printk("malloc called with impossibly large argument (%d)\n", + len); + panic("malloc: bad arg"); + } + /* + * Now we search for a bucket descriptor which has free space + */ + cli(); /* Avoid race conditions */ + for (bdesc = bdir->chain; bdesc; bdesc = bdesc->next) + if (bdesc->freeptr) + break; + /* + * If we didn't find a bucket with free space, then we'll + * allocate a new one. + */ + if (!bdesc) { + char *cp; + int i; + + if (!free_bucket_desc) + init_bucket_desc(); + bdesc = free_bucket_desc; + free_bucket_desc = bdesc->next; + bdesc->refcnt = 0; + bdesc->bucket_size = bdir->size; + bdesc->page = bdesc->freeptr = (void *) (cp = get_free_page()); + if (!cp) + panic("Out of memory in kernel malloc()"); + /* Set up the chain of free objects */ + for (i=PAGE_SIZE/bdir->size; i > 1; i--) { + *((char **) cp) = cp + bdir->size; + cp += bdir->size; + } + *((char **) cp) = 0; + bdesc->next = bdir->chain; /* OK, link it in! */ + bdir->chain = bdesc; + } + retval = (void *) bdesc->freeptr; + bdesc->freeptr = *((void **) retval); + bdesc->refcnt++; + sti(); /* OK, we're safe again */ + return(retval); +} + +/* + * Here is the free routine. If you know the size of the object that you + * are freeing, then free_s() will use that information to speed up the + * search for the bucket descriptor. + * + * We will #define a macro so that "free(x)" is becomes "free_s(x, 0)" + */ +void free_s(void *obj, int size) +{ + void *page; + struct _bucket_dir *bdir; + struct bucket_desc *bdesc, *prev; + + /* Calculate what page this object lives in */ + page = (void *) ((unsigned long) obj & 0xfffff000); + /* Now search the buckets looking for that page */ + for (bdir = bucket_dir; bdir->size; bdir++) { + prev = 0; + /* If size is zero then this conditional is always false */ + if (bdir->size < size) + continue; + for (bdesc = bdir->chain; bdesc; bdesc = bdesc->next) { + if (bdesc->page == page) + goto found; + prev = bdesc; + } + } + panic("Bad address passed to kernel free_s()"); +found: + cli(); /* To avoid race conditions */ + *((void **)obj) = bdesc->freeptr; + bdesc->freeptr = obj; + bdesc->refcnt--; + if (bdesc->refcnt == 0) { + /* + * We need to make sure that prev is still accurate. It + * may not be, if someone rudely interrupted us.... + */ + if ((prev && (prev->next != bdesc)) || + (!prev && (bdir->chain != bdesc))) + for (prev = bdir->chain; prev; prev = prev->next) + if (prev->next == bdesc) + break; + if (prev) + prev->next = bdesc->next; + else { + if (bdir->chain != bdesc) + panic("malloc bucket chains corrupted"); + bdir->chain = bdesc->next; + } + free_page((unsigned long) bdesc->page); + bdesc->next = free_bucket_desc; + free_bucket_desc = bdesc; + } + sti(); + return; +} + diff --git a/os/os/linux/lib/malloc.o b/os/os/linux/lib/malloc.o new file mode 100644 index 0000000..8366775 Binary files /dev/null and b/os/os/linux/lib/malloc.o differ diff --git a/os/os/linux/lib/open.c b/os/os/linux/lib/open.c new file mode 100644 index 0000000..8c3fc58 --- /dev/null +++ b/os/os/linux/lib/open.c @@ -0,0 +1,25 @@ +/* + * linux/lib/open.c + * + * (C) 1991 Linus Torvalds + */ + +#define __LIBRARY__ +#include +#include + +int open(const char * filename, int flag, ...) +{ + register int res; + va_list arg; + + va_start(arg,flag); + __asm__("int $0x80" + :"=a" (res) + :"0" (__NR_open),"b" (filename),"c" (flag), + "d" (va_arg(arg,int))); + if (res>=0) + return res; + errno = -res; + return -1; +} diff --git a/os/os/linux/lib/open.o b/os/os/linux/lib/open.o new file mode 100644 index 0000000..8d78c9d Binary files /dev/null and b/os/os/linux/lib/open.o differ diff --git a/os/os/linux/lib/setsid.c b/os/os/linux/lib/setsid.c new file mode 100644 index 0000000..68516c7 --- /dev/null +++ b/os/os/linux/lib/setsid.c @@ -0,0 +1,10 @@ +/* + * linux/lib/setsid.c + * + * (C) 1991 Linus Torvalds + */ + +#define __LIBRARY__ +#include + +_syscall0(pid_t,setsid) diff --git a/os/os/linux/lib/setsid.o b/os/os/linux/lib/setsid.o new file mode 100644 index 0000000..7326d9c Binary files /dev/null and b/os/os/linux/lib/setsid.o differ diff --git a/os/os/linux/lib/string.c b/os/os/linux/lib/string.c new file mode 100644 index 0000000..1182e63 --- /dev/null +++ b/os/os/linux/lib/string.c @@ -0,0 +1,14 @@ +/* + * linux/lib/string.c + * + * (C) 1991 Linus Torvalds + */ + +#ifndef __GNUC__ +#error I want gcc! +#endif + +#define extern +#define inline +#define __LIBRARY__ +#include diff --git a/os/os/linux/lib/string.o b/os/os/linux/lib/string.o new file mode 100644 index 0000000..840f038 Binary files /dev/null and b/os/os/linux/lib/string.o differ diff --git a/os/os/linux/lib/wait.c b/os/os/linux/lib/wait.c new file mode 100644 index 0000000..2815c16 --- /dev/null +++ b/os/os/linux/lib/wait.c @@ -0,0 +1,16 @@ +/* + * linux/lib/wait.c + * + * (C) 1991 Linus Torvalds + */ + +#define __LIBRARY__ +#include +#include + +_syscall3(pid_t,waitpid,pid_t,pid,int *,wait_stat,int,options) + +pid_t wait(int * wait_stat) +{ + return waitpid(-1,wait_stat,0); +} diff --git a/os/os/linux/lib/wait.o b/os/os/linux/lib/wait.o new file mode 100644 index 0000000..69f2ed6 Binary files /dev/null and b/os/os/linux/lib/wait.o differ diff --git a/os/os/linux/lib/write.c b/os/os/linux/lib/write.c new file mode 100644 index 0000000..df52e74 --- /dev/null +++ b/os/os/linux/lib/write.c @@ -0,0 +1,10 @@ +/* + * linux/lib/write.c + * + * (C) 1991 Linus Torvalds + */ + +#define __LIBRARY__ +#include + +_syscall3(int,write,int,fd,const char *,buf,off_t,count) diff --git a/os/os/linux/lib/write.o b/os/os/linux/lib/write.o new file mode 100644 index 0000000..0d45047 Binary files /dev/null and b/os/os/linux/lib/write.o differ diff --git a/os/os/linux/mm/Makefile b/os/os/linux/mm/Makefile new file mode 100644 index 0000000..e0bcd73 --- /dev/null +++ b/os/os/linux/mm/Makefile @@ -0,0 +1,38 @@ +AR =ar +AS =as +LD =ld +LDFLAGS =-m elf_i386 -Ttext 0 -e startup_32 +CC =gcc -march=i386 +CFLAGS =-w -g -fstrength-reduce -fomit-frame-pointer -mcld \ + -finline-functions -nostdinc -fno-stack-protector -I../include +CPP =gcc -E -nostdinc -I../include + +.c.o: + $(CC) $(CFLAGS) \ + -c -o $*.o $< +.s.o: + $(AS) -o $*.o $< +.c.s: + $(CC) $(CFLAGS) \ + -S -o $*.s $< + +OBJS = memory.o page.o + +all: mm.o + +mm.o: $(OBJS) + $(LD) -r -o mm.o $(OBJS) + +clean: + rm -f core *.o *.a tmp_make + for i in *.c;do rm -f `basename $$i .c`.s;done + +dep: + sed '/\#\#\# Dependencies/q' < Makefile > tmp_make + (for i in *.c;do $(CPP) -M $$i;done) >> tmp_make + cp tmp_make Makefile + +### Dependencies: +memory.o : memory.c ../include/signal.h ../include/sys/types.h \ + ../include/asm/system.h ../include/linux/sched.h ../include/linux/head.h \ + ../include/linux/fs.h ../include/linux/mm.h ../include/linux/kernel.h diff --git a/os/os/linux/mm/memory.c b/os/os/linux/mm/memory.c new file mode 100644 index 0000000..7cf53a4 --- /dev/null +++ b/os/os/linux/mm/memory.c @@ -0,0 +1,468 @@ +/* + * linux/mm/memory.c + * + * (C) 1991 Linus Torvalds + */ + +/* + * demand-loading started 01.12.91 - seems it is high on the list of + * things wanted, and it should be easy to implement. - Linus + */ + +/* + * Ok, demand-loading was easy, shared pages a little bit tricker. Shared + * pages started 02.12.91, seems to work. - Linus. + * + * Tested sharing by executing about 30 /bin/sh: under the old kernel it + * would have taken more than the 6M I have free, but it worked well as + * far as I could see. + * + * Also corrected some "invalidate()"s - I wasn't doing enough of them. + */ + +#include + +#include + +#include +#include +#include + +volatile void do_exit(long code); + +static inline volatile void oom(void) +{ + printk("out of memory\n\r"); + do_exit(SIGSEGV); +} + +#define invalidate() \ +__asm__("movl %%eax,%%cr3"::"a" (0)) + +/* these are not to be changed without changing head.s etc */ +#define LOW_MEM 0x100000 +#define PAGING_MEMORY (15*1024*1024) +#define PAGING_PAGES (PAGING_MEMORY>>12) +#define MAP_NR(addr) (((addr)-LOW_MEM)>>12) +#define USED 100 + +#define CODE_SPACE(addr) ((((addr)+4095)&~4095) < \ +current->start_code + current->end_code) + +static long HIGH_MEMORY = 0; + +#define copy_page(from,to) \ +__asm__("cld ; rep ; movsl"::"S" (from),"D" (to),"c" (1024)) + +static unsigned char mem_map [ PAGING_PAGES ] = {0,}; + +/* + * Get physical address of first (actually last :-) free page, and mark it + * used. If no free pages left, return 0. + */ +unsigned long get_free_page(void) +{ +register unsigned long __res asm("ax"); + +__asm__("std ; repne ; scasb\n\t" + "jne 1f\n\t" + "movb $1,1(%%edi)\n\t" + "sall $12,%%ecx\n\t" + "addl %2,%%ecx\n\t" + "movl %%ecx,%%edx\n\t" + "movl $1024,%%ecx\n\t" + "leal 4092(%%edx),%%edi\n\t" + "rep ; stosl\n\t" + "movl %%edx,%%eax\n\t" + "1:" + "cld\n\t" /* by wyj */ + :"=a" (__res) + :"0" (0),"i" (LOW_MEM),"c" (PAGING_PAGES), + "D" (mem_map+PAGING_PAGES-1) + ); +return __res; +} + +/* + * Free a page of memory at physical address 'addr'. Used by + * 'free_page_tables()' + */ +void free_page(unsigned long addr) +{ + if (addr < LOW_MEM) return; + if (addr >= HIGH_MEMORY) + panic("trying to free nonexistent page"); + addr -= LOW_MEM; + addr >>= 12; + if (mem_map[addr]--) return; + mem_map[addr]=0; + panic("trying to free free page"); +} + +/* + * This function frees a continuos block of page tables, as needed + * by 'exit()'. As does copy_page_tables(), this handles only 4Mb blocks. + */ +int free_page_tables(unsigned long from,unsigned long size) +{ + unsigned long *pg_table; + unsigned long * dir, nr; + + if (from & 0x3fffff) + panic("free_page_tables called with wrong alignment"); + if (!from) + panic("Trying to free up swapper memory space"); + size = (size + 0x3fffff) >> 22; + dir = (unsigned long *) ((from>>20) & 0xffc); /* _pg_dir = 0 */ + for ( ; size-->0 ; dir++) { + if (!(1 & *dir)) + continue; + pg_table = (unsigned long *) (0xfffff000 & *dir); + for (nr=0 ; nr<1024 ; nr++) { + if (1 & *pg_table) + free_page(0xfffff000 & *pg_table); + *pg_table = 0; + pg_table++; + } + free_page(0xfffff000 & *dir); + *dir = 0; + } + invalidate(); + return 0; +} + +/* + * Well, here is one of the most complicated functions in mm. It + * copies a range of linerar addresses by copying only the pages. + * Let's hope this is bug-free, 'cause this one I don't want to debug :-) + * + * Note! We don't copy just any chunks of memory - addresses have to + * be divisible by 4Mb (one page-directory entry), as this makes the + * function easier. It's used only by fork anyway. + * + * NOTE 2!! When from==0 we are copying kernel space for the first + * fork(). Then we DONT want to copy a full page-directory entry, as + * that would lead to some serious memory waste - we just copy the + * first 160 pages - 640kB. Even that is more than we need, but it + * doesn't take any more memory - we don't copy-on-write in the low + * 1 Mb-range, so the pages can be shared with the kernel. Thus the + * special case for nr=xxxx. + */ +int copy_page_tables(unsigned long from,unsigned long to,long size) +{ + unsigned long * from_page_table; + unsigned long * to_page_table; + unsigned long this_page; + unsigned long * from_dir, * to_dir; + unsigned long nr; + + if ((from&0x3fffff) || (to&0x3fffff)) + panic("copy_page_tables called with wrong alignment"); + from_dir = (unsigned long *) ((from>>20) & 0xffc); /* _pg_dir = 0 */ + to_dir = (unsigned long *) ((to>>20) & 0xffc); + size = ((unsigned) (size+0x3fffff)) >> 22; + for( ; size-->0 ; from_dir++,to_dir++) { + if (1 & *to_dir) + panic("copy_page_tables: already exist"); + if (!(1 & *from_dir)) + continue; + from_page_table = (unsigned long *) (0xfffff000 & *from_dir); + if (!(to_page_table = (unsigned long *) get_free_page())) + return -1; /* Out of memory, see freeing */ + *to_dir = ((unsigned long) to_page_table) | 7; + nr = (from==0)?0xA0:1024; + for ( ; nr-- > 0 ; from_page_table++,to_page_table++) { + this_page = *from_page_table; + if (!(1 & this_page)) + continue; + this_page &= ~2; + *to_page_table = this_page; + if (this_page > LOW_MEM) { + *from_page_table = this_page; + this_page -= LOW_MEM; + this_page >>= 12; + mem_map[this_page]++; + } + } + } + invalidate(); + return 0; +} + +/* + * This function puts a page in memory at the wanted address. + * It returns the physical address of the page gotten, 0 if + * out of memory (either when trying to access page-table or + * page.) + */ +unsigned long put_page(unsigned long page,unsigned long address) +{ + unsigned long tmp, *page_table; + +/* NOTE !!! This uses the fact that _pg_dir=0 */ + + if (page < LOW_MEM || page >= HIGH_MEMORY) + printk("Trying to put page %p at %p\n",page,address); + if (mem_map[(page-LOW_MEM)>>12] != 1) + printk("mem_map disagrees with %p at %p\n",page,address); + page_table = (unsigned long *) ((address>>20) & 0xffc); + if ((*page_table)&1) + page_table = (unsigned long *) (0xfffff000 & *page_table); + else { + if (!(tmp=get_free_page())) + return 0; + *page_table = tmp|7; + page_table = (unsigned long *) tmp; + } + page_table[(address>>12) & 0x3ff] = page | 7; +/* no need for invalidate */ + return page; +} + +void un_wp_page(unsigned long * table_entry) +{ + unsigned long old_page,new_page; + + old_page = 0xfffff000 & *table_entry; + if (old_page >= LOW_MEM && mem_map[MAP_NR(old_page)]==1) { + *table_entry |= 2; + invalidate(); + return; + } + if (!(new_page=get_free_page())) + oom(); + if (old_page >= LOW_MEM) + mem_map[MAP_NR(old_page)]--; + *table_entry = new_page | 7; + invalidate(); + copy_page(old_page,new_page); +} + +/* + * This routine handles present pages, when users try to write + * to a shared page. It is done by copying the page to a new address + * and decrementing the shared-page counter for the old page. + * + * If it's in code space we exit with a segment error. + */ +void do_wp_page(unsigned long error_code,unsigned long address) +{ +#if 0 +/* we cannot do this yet: the estdio library writes to code space */ +/* stupid, stupid. I really want the libc.a from GNU */ + if (CODE_SPACE(address)) + do_exit(SIGSEGV); +#endif + un_wp_page((unsigned long *) + (((address>>10) & 0xffc) + (0xfffff000 & + *((unsigned long *) ((address>>20) &0xffc))))); + +} + +void write_verify(unsigned long address) +{ + unsigned long page; + + if (!( (page = *((unsigned long *) ((address>>20) & 0xffc)) )&1)) + return; + page &= 0xfffff000; + page += ((address>>10) & 0xffc); + if ((3 & *(unsigned long *) page) == 1) /* non-writeable, present */ + un_wp_page((unsigned long *) page); + return; +} + +void get_empty_page(unsigned long address) +{ + unsigned long tmp; + + if (!(tmp=get_free_page()) || !put_page(tmp,address)) { + free_page(tmp); /* 0 is ok - ignored */ + oom(); + } +} + +/* + * try_to_share() checks the page at address "address" in the task "p", + * to see if it exists, and if it is clean. If so, share it with the current + * task. + * + * NOTE! This assumes we have checked that p != current, and that they + * share the same executable. + */ +static int try_to_share(unsigned long address, struct task_struct * p) +{ + unsigned long from; + unsigned long to; + unsigned long from_page; + unsigned long to_page; + unsigned long phys_addr; + + from_page = to_page = ((address>>20) & 0xffc); + from_page += ((p->start_code>>20) & 0xffc); + to_page += ((current->start_code>>20) & 0xffc); +/* is there a page-directory at from? */ + from = *(unsigned long *) from_page; + if (!(from & 1)) + return 0; + from &= 0xfffff000; + from_page = from + ((address>>10) & 0xffc); + phys_addr = *(unsigned long *) from_page; +/* is the page clean and present? */ + if ((phys_addr & 0x41) != 0x01) + return 0; + phys_addr &= 0xfffff000; + if (phys_addr >= HIGH_MEMORY || phys_addr < LOW_MEM) + return 0; + to = *(unsigned long *) to_page; + if (!(to & 1)) + if (to = get_free_page()) + *(unsigned long *) to_page = to | 7; + else + oom(); + to &= 0xfffff000; + to_page = to + ((address>>10) & 0xffc); + if (1 & *(unsigned long *) to_page) + panic("try_to_share: to_page already exists"); +/* share them: write-protect */ + *(unsigned long *) from_page &= ~2; + *(unsigned long *) to_page = *(unsigned long *) from_page; + invalidate(); + phys_addr -= LOW_MEM; + phys_addr >>= 12; + mem_map[phys_addr]++; + return 1; +} + +/* + * share_page() tries to find a process that could share a page with + * the current one. Address is the address of the wanted page relative + * to the current data space. + * + * We first check if it is at all feasible by checking executable->i_count. + * It should be >1 if there are other tasks sharing this inode. + */ +static int share_page(unsigned long address) +{ + struct task_struct ** p; + + if (!current->executable) + return 0; + if (current->executable->i_count < 2) + return 0; + for (p = &LAST_TASK ; p > &FIRST_TASK ; --p) { + if (!*p) + continue; + if (current == *p) + continue; + if ((*p)->executable != current->executable) + continue; + if (try_to_share(address,*p)) + return 1; + } + return 0; +} + +void do_no_page(unsigned long error_code,unsigned long address) +{ + int nr[4]; + unsigned long tmp; + unsigned long page; + int block,i; + + if (current->pid > 5) + printk(" --do_no_page: address=%x, pid=%d\n", address, current->pid); + + address &= 0xfffff000; + tmp = address - current->start_code; + if (!current->executable || tmp >= current->end_data) { + get_empty_page(address); + return; + } + if (share_page(tmp)) + return; + if (!(page = get_free_page())) + oom(); +/* remember that 1 block is used for header */ + block = 1 + tmp/BLOCK_SIZE; + for (i=0 ; i<4 ; block++,i++) + nr[i] = bmap(current->executable,block); + bread_page(page,current->executable->i_dev,nr); + i = tmp + 4096 - current->end_data; + tmp = page + 4096; + while (i-- > 0) { + tmp--; + *(char *)tmp = 0; + } + if (put_page(page,address)) + return; + free_page(page); + oom(); +} + +void do_no_pagex(unsigned long error_code,unsigned long address) +{ + int nr[4]; + unsigned long tmp; + unsigned long page; + int block,i; + + address &= 0xfffff000; + tmp = address - current->start_code; + if (!current->executable || tmp >= current->end_data) { + get_empty_page(address); + return; + } + if (share_page(tmp)) + return; + if (!(page = get_free_page())) + oom(); +/* remember that 1 block is used for header */ + block = 1 + tmp/BLOCK_SIZE; + for (i=0 ; i<4 ; block++,i++) + nr[i] = bmap(current->executable,block); + bread_page(page,current->executable->i_dev,nr); + i = tmp + 4096 - current->end_data; + tmp = page + 4096; + while (i-- > 0) { + tmp--; + *(char *)tmp = 0; + } + if (put_page(page,address)) + return; + free_page(page); + oom(); +} + +void mem_init(long start_mem, long end_mem) +{ + int i; + + HIGH_MEMORY = end_mem; + for (i=0 ; i>= 12; + while (end_mem-->0) + mem_map[i++]=0; +} + +void calc_mem(void) +{ + int i,j,k,free=0; + long * pg_tbl; + + for(i=0 ; i +#include + +#define NAME_MAX 80 +#include + +int main(int argc, char *argv[]) +{ + DIR *dir ; + struct dirent *de; + + if (argc != 1) + exit(1); + + if ((dir = opendir(".")) == NULL) + exit(1); + + while ((de = readdir(dir)) != NULL) + printf("%s\t", de->d_name); + + printf("\n"); + closedir(dir); + exit(0); +} diff --git a/os/os/linux/tools/build b/os/os/linux/tools/build new file mode 100644 index 0000000..0fa6ae7 Binary files /dev/null and b/os/os/linux/tools/build differ diff --git a/os/os/linux/tools/build.c b/os/os/linux/tools/build.c new file mode 100644 index 0000000..8b8c7ab --- /dev/null +++ b/os/os/linux/tools/build.c @@ -0,0 +1,171 @@ +/* + * linux/tools/build.c + * + * (C) 1991 Linus Torvalds + */ + +/* + * This file builds a disk-image from three different files: + * + * - bootsect: max 510 bytes of 8086 machine code, loads the rest + * - setup: max 4 sectors of 8086 machine code, sets up system parm + * - system: 80386 code for actual system + * + * It does some checking that all files are of the correct type, and + * just writes the result to stdout, removing headers and padding to + * the right amount. It also writes some system data to stderr. + */ + +/* + * Changes by tytso to allow root device specification + */ + +#include /* fprintf */ +#include +#include /* contains exit */ +#include /* unistd.h needs this */ +#include +#include +#include /* contains read/write */ +#include + +#define MAJOR(a) (((unsigned)(a))>>8) +#define MINOR(a) ((a)&0xff) + +#define MINIX_HEADER 32 +#define GCC_HEADER 0x80 /* 0x1000 */ /* by wyj */ + +#define SYS_SIZE 0x3000 + +#define DEFAULT_MAJOR_ROOT 0x03 //0x02 /* by wyj */ +#define DEFAULT_MINOR_ROOT 0x00 //0x1d + +/* max nr of sectors of setup: don't change unless you also change + * bootsect etc */ +#define SETUP_SECTS 4 + +#define STRINGIFY(x) #x + +void die(char * str) +{ + fprintf(stderr,"%s\n",str); + exit(1); +} + +void usage(void) +{ + die("Usage: build bootsect setup system [rootdev] [> image]"); +} + +int main(int argc, char ** argv) +{ + int i,c,id; + char buf[1024*4]; /* by wyj */ + char major_root, minor_root; + struct stat sb; + + if ((argc != 4) && (argc != 5)) + usage(); + if (argc == 5) { + if (strcmp(argv[4], "FLOPPY")) { + if (stat(argv[4], &sb)) { + perror(argv[4]); + die("Couldn't stat root device."); + } + major_root = MAJOR(sb.st_rdev); + minor_root = MINOR(sb.st_rdev); + } else { + major_root = 0; + minor_root = 0; + } + } else { + major_root = DEFAULT_MAJOR_ROOT; + minor_root = DEFAULT_MINOR_ROOT; + } + fprintf(stderr, "Root device is (%d, %d)\n", major_root, minor_root); + if ((major_root != 2) && (major_root != 3) && + (major_root != 0)) { + fprintf(stderr, "Illegal root device (major = %d)\n", + major_root); + die("Bad root device --- major #"); + } + for (i=0;i0 ; i+=c ) + if (write(1,buf,c)!=c) + die("Write call failed"); + close (id); + if (i > SETUP_SECTS*512) + die("Setup exceeds " STRINGIFY(SETUP_SECTS) + " sectors - rewrite build/boot/setup"); + fprintf(stderr,"Setup is %d bytes.\n",i); + for (c=0 ; c sizeof(buf)) + c = sizeof(buf); + if (write(1,buf,c) != c) + die("Write call failed"); + i += c; + } + + if ((id=open(argv[3],O_RDONLY,0))<0) + die("Unable to open 'system'"); + if (read(id,buf,GCC_HEADER) != GCC_HEADER) + die("Unable to read header of 'system'"); +// if (((long *) buf)[5] != 0) +// die("Non-GCC header of 'system'"); + for (i=0 ; (c=read(id,buf,sizeof buf))>0 ; i+=c ) + if (write(1,buf,c)!=c) + die("Write call failed"); + close(id); + fprintf(stderr,"System is %d bytes.\n",i); + if (i > SYS_SIZE*16) + die("System is too big"); + return(0); +} diff --git a/os/os/linux/tools/system b/os/os/linux/tools/system new file mode 100644 index 0000000..f61bee7 Binary files /dev/null and b/os/os/linux/tools/system differ