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
sys_fork(void)18 long 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
sys_vfork(void)29 long 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
old_mmap(unsigned long addr,unsigned long len,unsigned long prot,unsigned long flags,unsigned long fd,unsigned long offset)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
kernel_execve(const char * filename,const char * const argv[],const char * const envp[])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 }
69