sigprocmask.S revision 1.1 
1/*-
2 * Copyright (c) 1991, 1993
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Ralph Campbell.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the University nor the names of its contributors
17 *    may be used to endorse or promote products derived from this software
18 *    without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33#include "SYS.h"
34
35#if defined(SYSLIBC_SCCS)
36	.text
37	.asciz "$OpenBSD: sigprocmask.S,v 1.1 2004/08/11 17:31:00 pefo Exp $"
38#endif /* SYSLIBC_SCCS */
39
40SYSLEAF(sigprocmask)	# sigprocmask(how, new, old) sigset_t *new, *old;
41	.set	reorder
42	bne	a1, zero, gotptr	# if new sigset pointer not null
43	li	a0, 1			# how = SIG_BLOCK
44	b	doit			# mask = zero
45gotptr:
46	lw	a1, 0(a1)		# indirect to new mask arg
47doit:
48	li	v0, SYS_sigprocmask
49	syscall
50	bne	a3, zero, err
51	beq	a2, zero, out		# test if old mask requested
52	sw	v0, 0(a2)		# store old mask
53out:
54	move	v0, zero
55	j	ra
56err:
57	la	t9, _C_LABEL(cerror)
58	jr	t9
59SYSEND(sigprocmask)
60