]> Pileus Git - ~andy/linux/blob - arch/um/kernel/syscall.c
Merge branch 'for-linus-37rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml
[~andy/linux] / 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 #include "internal.h"
17
18 long sys_fork(void)
19 {
20         return do_fork(SIGCHLD, UPT_SP(&current->thread.regs.regs),
21                       &current->thread.regs, 0, NULL, NULL);
22 }
23
24 long sys_vfork(void)
25 {
26         return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD,
27                       UPT_SP(&current->thread.regs.regs),
28                       &current->thread.regs, 0, NULL, NULL);
29 }
30
31 long sys_clone(unsigned long clone_flags, unsigned long newsp,
32                void __user *parent_tid, void __user *child_tid)
33 {
34         if (!newsp)
35                 newsp = UPT_SP(&current->thread.regs.regs);
36
37         return do_fork(clone_flags, newsp, &current->thread.regs, 0, parent_tid,
38                       child_tid);
39 }
40
41 long old_mmap(unsigned long addr, unsigned long len,
42               unsigned long prot, unsigned long flags,
43               unsigned long fd, unsigned long offset)
44 {
45         long err = -EINVAL;
46         if (offset & ~PAGE_MASK)
47                 goto out;
48
49         err = sys_mmap_pgoff(addr, len, prot, flags, fd, offset >> PAGE_SHIFT);
50  out:
51         return err;
52 }
53
54 int kernel_execve(const char *filename,
55                   const char *const argv[],
56                   const char *const envp[])
57 {
58         mm_segment_t fs;
59         int ret;
60
61         fs = get_fs();
62         set_fs(KERNEL_DS);
63         ret = um_execve(filename, (const char __user *const __user *)argv,
64                         (const char __user *const __user *) envp);
65         set_fs(fs);
66
67         return ret;
68 }