summaryrefslogtreecommitdiffstats
path: root/libc/sysdeps/linux/m68k/vfork.S
blob: ec319d077b60d19012afeb7cc22a173ef27904b7 (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
/*
 * Copyright (C) 2000-2006 Erik Andersen <andersen@uclibc.org>
 *
 * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
 */

#include <features.h>

#include <asm/unistd.h>

#ifndef __NR_vfork
#define __NR_vfork __NR_fork /* uClinux-2.0 only has fork which is vfork */
#endif

#define IMM #

	.text
	.align 2
	.globl errno
	.globl	vfork
#ifdef __HAVE_ELF__
	.type	vfork,@function
#endif

vfork:
	movl	%sp@+, %a1               /* save the return address for later */
	movl	IMM __NR_vfork,%d0
	trap	#0
	movl	IMM -4097, %d1
	cmpl 	%d0, %d1
	bcs     fix_errno
	jmp		%a1@                     /* don't return,  just jmp directly */
fix_errno:
	negl	%d0
#ifndef __PIC__					/* needs handling as the other archs */
	movl	errno, %a0
#else
	movl	errno@GOT(%a5), %a0
#endif
	movl	%d0, %a0@
	movl	IMM -1, %d0
	jmp		%a1@                     /* don't return,  just jmp directly */

.size vfork,.-vfork
libc_hidden_def(vfork)