include/asm-um/unistd.h

   1 /*
   2  * Copyright (C) 2000, 2001  Jeff Dike (jdike@karaya.com)
   3  * Licensed under the GPL
   4  */
   5
   6 #ifndef _UM_UNISTD_H_
   7 #define _UM_UNISTD_H_
   8
   9 #include <linux/syscalls.h>
  10 #include "linux/resource.h"
  11 #include "asm/uaccess.h"
  12
  13 extern int um_execve(const char *file, char *const argv[], char *const env[]);
  14
  15 #ifdef __KERNEL__
  16 #define __ARCH_WANT_IPC_PARSE_VERSION
  17 #define __ARCH_WANT_OLD_READDIR
  18 #define __ARCH_WANT_OLD_STAT
  19 #define __ARCH_WANT_STAT64
  20 #define __ARCH_WANT_SYS_ALARM
  21 #define __ARCH_WANT_SYS_GETHOSTNAME
  22 #define __ARCH_WANT_SYS_PAUSE
  23 #define __ARCH_WANT_SYS_SGETMASK
  24 #define __ARCH_WANT_SYS_SIGNAL
  25 #define __ARCH_WANT_SYS_TIME
  26 #define __ARCH_WANT_SYS_UTIME
  27 #define __ARCH_WANT_SYS_WAITPID
  28 #define __ARCH_WANT_SYS_SOCKETCALL
  29 #define __ARCH_WANT_SYS_FADVISE64
  30 #define __ARCH_WANT_SYS_GETPGRP
  31 #define __ARCH_WANT_SYS_LLSEEK
  32 #define __ARCH_WANT_SYS_NICE
  33 #define __ARCH_WANT_SYS_OLD_GETRLIMIT
  34 #define __ARCH_WANT_SYS_OLDUMOUNT
  35 #define __ARCH_WANT_SYS_SIGPENDING
  36 #define __ARCH_WANT_SYS_SIGPROCMASK
  37 #define __ARCH_WANT_SYS_RT_SIGACTION
  38 #endif
  39
  40 #ifdef __KERNEL_SYSCALLS__
  41
  42 #include <linux/compiler.h>
  43 #include <linux/types.h>
  44
  45 #define KERNEL_CALL(ret_t, sys, args...)        \
  46         mm_segment_t fs = get_fs();             \
  47         ret_t ret;                              \
  48         set_fs(KERNEL_DS);                      \
  49         ret = sys(args);                        \
  50         set_fs(fs);                             \
  51         if (ret >= 0)                           \
  52                 return ret;                     \
  53         errno = -(long)ret;                     \
  54         return -1;
  55
  56 static inline long open(const char *pathname, int flags, int mode)
  57 {
  58         KERNEL_CALL(int, sys_open, pathname, flags, mode)
  59 }
  60
  61 static inline long dup(unsigned int fd)
  62 {
  63         KERNEL_CALL(int, sys_dup, fd);
  64 }
  65
  66 static inline long close(unsigned int fd)
  67 {
  68         KERNEL_CALL(int, sys_close, fd);
  69 }
  70
  71 static inline int execve(const char *filename, char *const argv[],
  72                          char *const envp[])
  73 {
  74         KERNEL_CALL(int, um_execve, filename, argv, envp);
  75 }
  76
  77 static inline long waitpid(pid_t pid, unsigned int *status, int options)
  78 {
  79         KERNEL_CALL(pid_t, sys_wait4, pid, status, options, NULL)
  80 }
  81
  82 static inline pid_t setsid(void)
  83 {
  84         KERNEL_CALL(pid_t, sys_setsid)
  85 }
  86
  87 static inline long lseek(unsigned int fd, off_t offset, unsigned int whence)
  88 {
  89         KERNEL_CALL(long, sys_lseek, fd, offset, whence)
  90 }
  91
  92 static inline int read(unsigned int fd, char * buf, int len)
  93 {
  94         KERNEL_CALL(int, sys_read, fd, buf, len)
  95 }
  96
  97 static inline int write(unsigned int fd, char * buf, int len)
  98 {
  99         KERNEL_CALL(int, sys_write, fd, buf, len)
 100 }
 101
 102 long sys_mmap2(unsigned long addr, unsigned long len,
 103                 unsigned long prot, unsigned long flags,
 104                 unsigned long fd, unsigned long pgoff);
 105 int sys_execve(char *file, char **argv, char **env);
 106 long sys_clone(unsigned long clone_flags, unsigned long newsp,
 107                 int *parent_tid, int *child_tid);
 108 long sys_fork(void);
 109 long sys_vfork(void);
 110 int sys_pipe(unsigned long *fildes);
 111 int sys_ptrace(long request, long pid, long addr, long data);
 112 struct sigaction;
 113 asmlinkage long sys_rt_sigaction(int sig,
 114                                 const struct sigaction __user *act,
 115                                 struct sigaction __user *oact,
 116                                 size_t sigsetsize);
 117
 118 #endif
 119
 120 /* Save the value of __KERNEL_SYSCALLS__, undefine it, include the underlying
 121  * arch's unistd.h for the system call numbers, and restore the old
 122  * __KERNEL_SYSCALLS__.
 123  */
 124
 125 #ifdef __KERNEL_SYSCALLS__
 126 #define __SAVE_KERNEL_SYSCALLS__ __KERNEL_SYSCALLS__
 127 #endif
 128
 129 #undef __KERNEL_SYSCALLS__
 130 #include "asm/arch/unistd.h"
 131
 132 #ifdef __KERNEL_SYSCALLS__
 133 #define __KERNEL_SYSCALLS__ __SAVE_KERNEL_SYSCALLS__
 134 #endif
 135
 136 #endif
 137
 138 /*
 139  * Overrides for Emacs so that we follow Linus's tabbing style.
 140  * Emacs will notice this stuff at the end of the file and automatically
 141  * adjust the settings for this buffer only.  This must remain at the end
 142  * of the file.
 143  * ---------------------------------------------------------------------------
 144  * Local variables:
 145  * c-file-style: "linux"
 146  * End:
 147  */