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/*
30 * The MIPS pipe syscall returns results in two registers, which
31 * we have to copy into the supplied array. This prevents us from
32 * using an auto-generated stub.
33 */
34
35#include <asm/unistd.h>
36
37	.text
38
39/* int pipe(int[]) */
40
41	.type	pipe,@function
42	.global	pipe
43	.align	4
44	.ent	pipe
45pipe:
46	.set	noreorder
47	.cpload	$t9
48	li	$v0,__NR_pipe
49	syscall			/* syscall returns results in v0,v1 */
50	bnez	$a3, 1f		/* check errno */
51	 nop
52	sw	$v0, 0($a0)
53	sw	$v1, 4($a0)
54	j	$ra
55	 move	$v0, $zero
561:
57	la	$t9, __set_errno
58	j	$t9
59	 move    $a0, $v0	/* delay slot, prepare args for __set_errno */
60	.end	pipe
61