sigprocmask.S revision 1.3 
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 1.3 2004/09/09 16:14:02 pefo Exp $"
38#endif /* SYSLIBC_SCCS */
39
40FRAMESZ= MKFSIZ(1,1)
41GPOFF= FRAMESZ-2*REGSZ
42
43SYSLEAF(sigprocmask, FRAMESZ)
44	PTR_SUBU sp, FRAMESZ
45	SETUP_GP64(GPOFF, sigprocmask)
46	.set	reorder
47	bne	a1, zero, gotptr	# if new sigset pointer not null
48	li	a0, 1			# how = SIG_BLOCK
49	b	doit			# mask = zero
50gotptr:
51	lw	a1, 0(a1)		# indirect to new mask arg
52doit:
53	li	v0, SYS_sigprocmask
54	syscall
55	bne	a3, zero, err
56	beq	a2, zero, out		# test if old mask requested
57	sw	v0, 0(a2)		# store old mask
58out:
59	move	v0, zero
60	RESTORE_GP64
61	PTR_ADDU sp, FRAMESZ
62	j	ra
63err:
64	LA	t9, _C_LABEL(cerror)
65	RESTORE_GP64
66	PTR_ADDU sp, FRAMESZ
67	jr	t9
68SYSEND(sigprocmask)
69