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