From e390dc3536cf49eff173ecacce75fbd721cc4154 Mon Sep 17 00:00:00 2001 From: pumnflqv2 Date: Tue, 5 Jul 2022 05:18:46 +0800 Subject: [PATCH] ADD file via upload --- cur/linux/kernel/sys.c | 407 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 407 insertions(+) create mode 100644 cur/linux/kernel/sys.c diff --git a/cur/linux/kernel/sys.c b/cur/linux/kernel/sys.c new file mode 100644 index 0000000..fbacd67 --- /dev/null +++ b/cur/linux/kernel/sys.c @@ -0,0 +1,407 @@ +/* + * linux/kernel/sys.c + * + * (C) 1991 Linus Torvalds + */ + +#include +#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); +} +#define cursor_side 6 +static int flag=0; +int sys_init_graphics(int color) +{ + int i; + char *p=vga_graph_memstart; + if(!flag){ + /* 图形控制器，拼接器有关寄存器端口是0x3CE和0x3C4 */ + /* 先往寄存器端口写索引号，端口地址下一个写命令或读入数据 */ + /* 在0x3CE端口中有对应索引号0x06的寄存器， + 第0位用来控制字符模式,1启动图形模式;2,3位决定显存位置*/ + /* 0x3CE中索引号0x05的寄存器， + 第六位设置为1，设定为256色*/ + outb(0x05,0x3CE); + outb(0x40,0x3CF);/* 设定256色，且取出方式为移动拼装*/ + + /*显存区域 A0000H - AFFFFH(64KB) */ + outb(0x06,0x3CE); + outb(0x05,0x3CF);/*设定现存的地址区域，禁止字符模式*/ + + /*0x4C4下的索引号为0x04的寄存器 + 第四位为chain4，用于将4个显存片连在一起*/ + outb(0x04,0x3C4); + outb(0x08,0x3C5);/*设定将4个现存片连在一起*/ + + /*设置End Horizontal Display 为79*/ + /*用于控制在屏幕上显示的扫描线长度 */ + outb(0x01,0x3D4); + outb(0x4F,0x3D5); + /*0x03寄存器,0-4位表示End Horizontal Blanking + 5,6位表示Display Enable Skew;7位表示EVRA*/ + outb(0x03,0x3D4); + outb(0x82,0x3D5); //设置Skew 为0 + + outb(0x07,0x3D4); + outb(0x1F,0x3D5);/*vertical display end No8,9 bit=1,0*/ + + outb(0x12,0x3D4); + outb(0x8F,0x3D5);/*vertical display end low 7b =0x8F*/ + /*CRT控制器中索引号为0x17的寄存器中的SLDIV位设置为1, + Scanline Counter加一的周期为两个扫描周期*/ + outb(0x17,0x3D4); + outb(0xA3,0x3D5);/*SLDIV=1 ,scanline clock/2*/ + + outb(0x14,0x3D4); + outb(0x40,0x3D5);/*DW=1*/ + /*移动距离 = 2*Memory Address Size + * Offset Register/Pixels Per Address*/ + outb(0x13,0x3D4); + outb(0x28,0x3D5);/*Offset=40, 20:bian chang*/ + /*开始绘制屏幕*/ + outb(0x0C,0x3D4); + outb(0x00,0x3D5); + outb(0x0D,0x3D4); + outb(0x00,0x3D5);/*Start Address=0xA0000*/ + flag=1; + } + + for(i=0;inext; + put_fs_byte(m->mid,msg); //消息的id类型 + free(m); + return 1; +} + + +user_timer *timer_head=NULL; +int sys_timer_create(long milliseconds,int type) +{ + long jiffies = milliseconds / 10; + user_timer *timer = (user_timer*)malloc(sizeof(user_timer)); + timer->init_jiffies=jiffies; + timer->jiffies=jiffies; + timer->next=timer_head; + timer->type=type; + timer->pid=-1; + timer_head=timer; + return 1; +} + +int sys_paint(unsigned char *ob){ + int i,j,x,y,w,h,color; + x=get_fs_byte(ob); + y=get_fs_byte(ob+1); + w=get_fs_byte(ob+2); + h=get_fs_byte(ob+3); + color=get_fs_byte(ob+4); + w+=x; + h+=y; + char *p; + for(i=x;i<=w;i++){ + for(j=y;j<=h;j++){ + p=(char *)vga_graph_memstart+j*vga_width+i; + *p=color; + } + } + return 1; +} \ No newline at end of file