1/* $OpenBSD: sigprocmask.S,v 1.15 2023/12/10 16:45:51 deraadt Exp $ */
2
3/*
4 * Copyright (c) 1996 Dale Rahn
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
16 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
17 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
19 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
28/* sigprocmask(int how, const sigset_t *set, sigset_t *oset); */
29
30#include "SYS.h"
31
32	.text
33SYSENTRY_HIDDEN(sigprocmask)
34	RETGUARD_SETUP(sigprocmask, %r11, %r12)
35	stwu	1, -16(1)
36	stw	5, 12(1)
37
38	/* check set (new mask value) for null, in which case
39	   fiddle arguments */
40	cmpwi	4, 0
41	bne+	.L_load_set
42	addi	3, 0, 1	/* how = SIG_BLOCK, new mask already 0 */
43	b .L_do_call
44.L_load_set:
45	lwz	4, 0(4)	/* get new mask */
46.L_do_call:
47
48	li	0, SYS_sigprocmask
4999:	sc
50	PINSYSCALL(SYS_sigprocmask, 99b)
51
52	/* didnt work? */
53	cmpwi	0, 0
54	beq+	.L_sigprocmask_ok
55	stw	0, R2_OFFSET_ERRNO(2)
56	li	3, -1
57	b	.L_end
58
59.L_sigprocmask_ok:
60	lwz	5, 12(1)
61	cmpwi	5, 0
62	beq+	.L_sigprocmask_done
63	stw	3, 0(5)
64.L_sigprocmask_done:
65	li	3, 0
66	addi	1, 1, 16
67.L_end:
68	RETGUARD_CHECK(sigprocmask, %r11, %r12)
69	blr
70SYSCALL_END_HIDDEN(sigprocmask)
71