sigsetjmp.S revision 1.3 
1/*	$NetBSD: sigsetjmp.S,v 1.3 1996/09/16 18:11:03 jonathan Exp $	*/
2
3/*-
4 * Copyright (c) 1991, 1993, 1995,
5 *	The Regents of the University of California.  All rights reserved.
6 *
7 * This code is derived from software contributed to Berkeley by
8 * Havard Eidnes.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 *    must display the following acknowledgement:
20 *	This product includes software developed by the University of
21 *	California, Berkeley and its contributors.
22 * 4. Neither the name of the University nor the names of its contributors
23 *    may be used to endorse or promote products derived from this software
24 *    without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * SUCH DAMAGE.
37 */
38
39#include <sys/syscall.h>
40#include <machine/regnum.h>
41#include <machine/machAsmDefs.h>
42#include <machine/setjmp.h>
43
44#if defined(LIBC_SCCS) && !defined(lint)
45	ASMSTR("from: @(#)setjmp.s	8.1 (Berkeley) 6/4/93")
46	ASMSTR("$NetBSD: sigsetjmp.S,v 1.3 1996/09/16 18:11:03 jonathan Exp $")
47#endif /* LIBC_SCCS and not lint */
48
49/*
50 * C library -- sigsetjmp, siglongjmp
51 *
52 *	siglongjmp(a,v)
53 * will generate a "return(v)" from
54 * the last call to
55 *	sigsetjmp(a, savemask)
56 * by restoring registers from the stack,
57 * and dependent on savemask restores the
58 * signal mask.
59 */
60
61LEAF(sigsetjmp)
62	sw	a1, (_JBLEN*4)(a0)		# save "savemask"
63	bne	a1, 0x0, 1f			# do saving of signal mask?
64	j	_setjmp
651:	j	setjmp
66END(sigsetjmp)
67
68LEAF(siglongjmp)
69	lw	t0, (_JBLEN * 4)(a0)		# get "savemask"
70	bne	t0, 0x0, 1f			# restore signal mask?
71	j	_longjmp
721:	j	longjmp
73END(siglongjmp)
74