arch/um/kernel/syscall.c

   1 /*
   2  * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
   3  * Licensed under the GPL
   4  */
   5
   6 #include "linux/file.h"
   7 #include "linux/fs.h"
   8 #include "linux/mm.h"
   9 #include "linux/sched.h"
  10 #include "linux/utsname.h"
  11 #include "linux/syscalls.h"
  12 #include "asm/current.h"
  13 #include "asm/mman.h"
  14 #include "asm/uaccess.h"
  15 #include "asm/unistd.h"
  16
  17 long sys_fork(void)
  18 {
  19         return do_fork(SIGCHLD, UPT_SP(&current->thread.regs.regs),
  20                       &current->thread.regs, 0, NULL, NULL);
  21 }
  22
  23 long sys_vfork(void)
  24 {
  25         return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD,
  26                       UPT_SP(&current->thread.regs.regs),
  27                       &current->thread.regs, 0, NULL, NULL);
  28 }
  29
  30 long sys_clone(unsigned long clone_flags, unsigned long newsp,
  31                void __user *parent_tid, void __user *child_tid)
  32 {
  33         if (!newsp)
  34                 newsp = UPT_SP(&current->thread.regs.regs);
  35
  36         return do_fork(clone_flags, newsp, &current->thread.regs, 0, parent_tid,
  37                       child_tid);
  38 }
  39
  40 long old_mmap(unsigned long addr, unsigned long len,
  41               unsigned long prot, unsigned long flags,
  42               unsigned long fd, unsigned long offset)
  43 {
  44         long err = -EINVAL;
  45         if (offset & ~PAGE_MASK)
  46                 goto out;
  47
  48         err = sys_mmap_pgoff(addr, len, prot, flags, fd, offset >> PAGE_SHIFT);
  49  out:
  50         return err;
  51 }