vfork.S revision 7efad83d430f4d824f2aaa75edea5106f6ff8aae 
1/*
2 * Copyright (C) 2008 The Android Open Source Project
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *  * Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 *  * Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in
12 *    the documentation and/or other materials provided with the
13 *    distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
18 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
19 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
22 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
25 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29#include <private/bionic_asm.h>
30#include <linux/sched.h>
31
32// TODO: mips' uapi signal.h is missing #ifndef __ASSEMBLY__.
33// #include <asm/signal.h>
34#define SIGCHLD 18
35
36	.text
37
38#if (_MIPS_SIM == _ABIO32) || (_MIPS_SIM == _ABI32)
39FRAMESZ		=	MKFSIZ(5,0)
40#else
41FRAMESZ		=	MKFSIZ(0,0)
42#endif
43
44LEAF(vfork,FRAMESZ)
45#if FRAMESZ!=0
46	PTR_SUBU sp, FRAMESZ
47#endif
48	SETUP_GP64(a5, vfork)
49	LI	a0, (CLONE_VM | CLONE_VFORK | SIGCHLD)
50	move	a1, $0
51	move	a2, $0
52	move	a3, $0
53#if (_MIPS_SIM == _ABIO32) || (_MIPS_SIM == _ABI32)
54	REG_S	$0, 4*REGSZ(sp)
55#else
56	move	a4, $0
57#endif
58	LI	v0, __NR_clone
59	syscall
60#if FRAMESZ!=0
61	PTR_ADDU sp,FRAMESZ
62#endif
63	move	a0, v0
64	bnez	a3, 1f
65	RESTORE_GP64
66	j	ra
671:
68	LA	t9,__set_errno_internal
69	RESTORE_GP64
70	j	t9
71	END(vfork)
72