sigsetjmp.S revision 178580 
1/*	$NetBSD: sigsetjmp.S,v 1.8 2005/09/17 11:49:39 tsutsui 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. Neither the name of the University nor the names of its contributors
19 *    may be used to endorse or promote products derived from this software
20 *    without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 */
34
35#include <machine/asm.h>
36__FBSDID("$FreeBSD: head/lib/libc/mips/gen/sigsetjmp.S 178580 2008-04-26 12:08:02Z imp $");
37#include <machine/regnum.h>
38#if defined(LIBC_SCCS) && !defined(lint)
39	ASMSTR("from: @(#)setjmp.s	8.1 (Berkeley) 6/4/93")
40	ASMSTR("$NetBSD: sigsetjmp.S,v 1.8 2005/09/17 11:49:39 tsutsui Exp $")
41#endif /* LIBC_SCCS and not lint */
42
43#ifdef __ABICALLS__
44	.abicalls
45#endif
46
47/*
48 * C library -- sigsetjmp, siglongjmp
49 *
50 *	siglongjmp(a,v)
51 * will generate a "return(v)" from
52 * the last call to
53 *	sigsetjmp(a, savemask)
54 * by restoring registers from the stack,
55 * and dependent on savemask restores the
56 * signal mask.
57 */
58
59LEAF(sigsetjmp)
60#ifdef __ABICALLS__
61	.set	noreorder
62	.cpload	t9
63	.set	reorder
64#endif
65	bne	a1, 0x0, 1f			# do saving of signal mask?
66	la	t9, _setjmp
67	jr t9
68
691:	la	t9, setjmp
70	jr t9
71END(sigsetjmp)
72
73LEAF(siglongjmp)
74#ifdef __ABICALLS__
75	.set	noreorder
76	.cpload	t9
77	.set	reorder
78#endif
79	lw	t0, (_JB_MAGIC  * SZREG)(a0)
80	li	t1, _JB_MAGIC__SETJMP
81	bne	t0, t1, 1f			# setjmp or _setjmp magic?
82	la	t9, _longjmp
83	jr	t9
841:	la	t9, longjmp
85	jr	t9
86END(siglongjmp)
87