diff --git a/sys(Lab2).h b/sys(Lab2).h
new file mode 100644
index 0000000..e402645
--- /dev/null
+++ b/sys(Lab2).h
@@ -0,0 +1,113 @@
+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();
+/* ����4��ϵͳ���� */
+extern int sys_pthread_attr_init();
+extern int sys_thread_fork();
+extern int sys_thread_join();
+extern int sys_thread_exit();
+
+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_pthread_attr_init, sys_thread_fork,
+	sys_thread_join, sys_thread_exit };
+
+/* So we don't have to do any more manual updating.... */
+int NR_syscalls = sizeof(sys_call_table)/sizeof(fn_ptr);
\ No newline at end of file