1/* $OpenBSD: sigsetjmp.S,v 1.5 2005/08/07 16:40:15 espie Exp $ */
2/*-
3 * Copyright (c) 1991, 1993, 1995,
4 *	The Regents of the University of California.  All rights reserved.
5 *
6 * This code is derived from software contributed to Berkeley by
7 * Havard Eidnes.
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 <private/bionic_asm.h>
35#include <machine/regnum.h>
36#include <machine/setjmp.h>
37
38/*
39 * trampolines for sigsetjmp and  siglongjmp save and restore mask.
40 *
41 */
42FRAMESZ= MKFSIZ(1,1)
43GPOFF= FRAMESZ-2*REGSZ
44
45LEAF(sigsetjmp, FRAMESZ)
46	PTR_SUBU sp, FRAMESZ
47	SETUP_GP64(GPOFF, sigsetjmp)
48	.set	reorder
49	REG_S	a1, (_JBLEN*REGSZ)(a0)		# save "savemask"
50	bne	a1, 0x0, 1f			# do saving of signal mask?
51	LA	t9, _setjmp
52	RESTORE_GP64
53	PTR_ADDU sp, FRAMESZ
54	jr t9
55
561:	LA	t9, setjmp
57	RESTORE_GP64
58	PTR_ADDU sp, FRAMESZ
59	jr t9
60END(sigsetjmp)
61
62LEAF(siglongjmp, FRAMESZ)
63	PTR_SUBU sp, FRAMESZ
64	SETUP_GP64(GPOFF, siglongjmp)
65	.set	reorder
66	REG_L	t0, (_JBLEN*REGSZ)(a0)		# get "savemask"
67	bne	t0, 0x0, 1f			# restore signal mask?
68	LA	t9, _longjmp
69	RESTORE_GP64
70	PTR_ADDU sp, FRAMESZ
71	jr	t9
721:
73	LA	t9, longjmp
74	RESTORE_GP64
75	PTR_ADDU sp, FRAMESZ
76	jr	t9
77END(siglongjmp)
78