tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
18long sys_fork(void)
19{
20 long ret;
21
22 current->thread.forking = 1;
23 ret = do_fork(SIGCHLD, UPT_SP(¤t->thread.regs.regs),
24 ¤t->thread.regs, 0, NULL, NULL);
25 current->thread.forking = 0;
26 return ret;
27}
28
29long sys_vfork(void)
30{
31 long ret;
32
33 current->thread.forking = 1;
34 ret = do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD,
35 UPT_SP(¤t->thread.regs.regs),
36 ¤t->thread.regs, 0, NULL, NULL);
37 current->thread.forking = 0;
38 return ret;
39}
40
41long 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
54int 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}