blob: 486a7e8e4d1a9507c901bc75f9b2e34e931b2e49 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
|
/* vi: set sw=4 ts=4: */
/* vfork for uClibc
*
* Copyright (C) 2000 by Lineo, inc. and Erik Andersen
* Copyright (C) 2000-2006 by Erik Andersen <andersen@uclibc.org>
* Written by Erik Andersen <andersen@uclibc.org>
*
* Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
*/
#include <features.h>
#define _ERRNO_H
#include <bits/errno.h>
#include <sys/syscall.h>
#ifdef __NR_fork
.text
.global __vfork
.hidden __vfork
.type __vfork,%function
.align 4
__vfork:
#ifdef __NR_vfork
DO_CALL (vfork)
cmn r0, #4096
#if defined(__THUMB_INTERWORK__)
bxcc lr
#else
movcc pc, lr
#endif
/* Check if vfork even exists. */
ldr r1, =-ENOSYS
teq r0, r1
bne __error
#endif
/* If we don't have vfork, use fork. */
DO_CALL (fork)
cmn r0, #4096
/* Syscall worked. Return to child/parent */
#if defined(__THUMB_INTERWORK__)
bxcc lr
#else
movcc pc, lr
#endif
__error:
b __syscall_error
.size __vfork,.-__vfork
weak_alias(__vfork,vfork)
libc_hidden_def(vfork)
#endif
|
