unistd.h

fairysky系统,是一个小型的内核,模拟linux原始版本的

#ifndef _LINUX_UNISTD_H
#define _LINUX_UNISTD_H

/*
 * This file contains the system call numbers and the syscallX
 * macros
 */

#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_oldstat        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_oldfstat       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_olduname       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_oldlstat       84
#define __NR_readlink       85
#define __NR_uselib         86
#define __NR_swapon         87
#define __NR_reboot         88
#define __NR_readdir        89
#define __NR_mmap           90
#define __NR_munmap         91
#define __NR_truncate       92
#define __NR_ftruncate      93
#define __NR_fchmod         94
#define __NR_fchown         95
#define __NR_getpriority    96
#define __NR_setpriority    97
#define __NR_profil         98
#define __NR_statfs         99
#define __NR_fstatfs        100
#define __NR_ioperm         101
#define __NR_socketcall     102
#define __NR_syslog         103
#define __NR_setitimer      104
#define __NR_getitimer      105
#define __NR_stat           106
#define __NR_lstat          107
#define __NR_fstat          108
#define __NR_uname          109
#define __NR_iopl           110

extern int errno;

/* XXX - _foo needs to be __foo, while __NR_bar could be _NR_bar. */
#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 ("movl %2,%%ebx\n\t" \
        "int $0x80" \
        : "=a" (__res) \
        : "0" (__NR_##name),"g" ((long)(a)):"bx"); \
    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 ("movl %2,%%ebx\n\t" \
        "int $0x80" \
        : "=a" (__res) \
        : "0" (__NR_##name),"g" ((long)(a)),"c" ((long)(b)):"bx"); \
    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 ("movl %2,%%ebx\n\t" \
        "int $0x80" \
        : "=a" (__res) \
        : "0" (__NR_##name),"g" ((long)(a)),"c" ((long)(b)),"d" ((long)(c)):"bx"); \
    if (__res>=0) {\
        return (type) __res; \
    }\
    errno=-__res; \
    return -1; \
}

#define _syscall4(type, name, atype, a, btype, b, ctype, c, dtype, d) \
type name(atype a, btype b, ctype c, dtype d) \
{ \
    long __res; \
    __asm__ volatile ("movl %2,%%ebx\n\t" \
        "int $0x80" \
        : "=a" (__res) \
        : "0" (__NR_##name),"b" ((long)(a)),"c" ((long)(b)), \
        "d" ((long)(c)),"S" ((long)(d))); \
    if (__res>=0) {\
        return (type) __res; \
    }\
    errno=-__res; \
    return -1; \
}

#define _syscall5(type, name, atype, a, btype, b, ctype, c, dtype, d, etype, e) \
type name(atype a, btype b, ctype c, dtype d, etype e) \
{ \
    long __res; \
    __asm__ volatile ("movl %2,%%ebx\n\t" \
        "int $0x80" \
        : "=a" (__res) \
        : "0" (__NR_##name),"b" ((long)(a)),"c" ((long)(b)), \
        "d" ((long)(c)),"S" ((long)(d)),"D" ((long)(e))); \
    if (__res>=0) {\
        return (type) __res; \
    }\
    errno=-__res; \
    return -1; \
}

#endif /* _LINUX_UNISTD_H */