sigprocmask.S revision 1.8 
1/*	$OpenBSD: sigprocmask.S,v 1.8 2023/12/10 16:45:51 deraadt Exp $ */
2/*-
3 * Copyright (c) 1991, 1993
4 *	The Regents of the University of California.  All rights reserved.
5 *
6 * This code is derived from software contributed to Berkeley by
7 * Ralph Campbell.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in the
16 *    documentation and/or other materials provided with the distribution.
17 * 3. Neither the name of the University nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#include "SYS.h"
35
36FRAMESZ= MKFSIZ(1,1)
37GPOFF= FRAMESZ-2*REGSZ
38
39SYSLEAF_HIDDEN(sigprocmask, FRAMESZ)
40	PTR_SUBU sp, FRAMESZ
41	SETUP_GP64(GPOFF, _HIDDEN(sigprocmask))
42	.set	reorder
43	bne	a1, zero, .Lgotptr	# if new sigset pointer not null
44	li	a0, 1			# how = SIG_BLOCK
45	b	.Ldoit			# mask = zero
46.Lgotptr:
47	lw	a1, 0(a1)		# indirect to new mask arg
48.Ldoit:
49	li	v0, SYS_sigprocmask
5099:	syscall
51	PINSYSCALL(SYS_sigprocmask, 99b)
52	bne	a3, zero, .Lerr
53	beq	a2, zero, .Lout		# test if old mask requested
54	sw	v0, 0(a2)		# store old mask
55.Lout:
56	move	v0, zero
57	RESTORE_GP64
58	PTR_ADDU sp, FRAMESZ
59	j	ra
60.Lerr:
61	LA	t9, CERROR
62	RESTORE_GP64
63	PTR_ADDU sp, FRAMESZ
64	jr	t9
65SYSCALL_END_HIDDEN(sigprocmask)
66