1/*	$OpenBSD: setjmp.S,v 1.7 2023/12/10 16:45:52 deraadt Exp $	*/
2/*	$NetBSD: setjmp.S,v 1.4 2000/08/28 00:45:59 eeh Exp $	*/
3
4/*
5 * Copyright (c) 1992, 1993
6 *	The Regents of the University of California.  All rights reserved.
7 *
8 * This software was developed by the Computer Systems Engineering group
9 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
10 * contributed to Berkeley.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 *    notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 *    notice, this list of conditions and the following disclaimer in the
19 *    documentation and/or other materials provided with the distribution.
20 * 3. Neither the name of the University nor the names of its contributors
21 *    may be used to endorse or promote products derived from this software
22 *    without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 */
36
37/*
38 * C library -- setjmp, longjmp
39 *
40 *	longjmp(a,v)
41 * will generate a "return(v)" from
42 * the last call to
43 *	setjmp(a)
44 * by restoring the previous context.
45 * The previous signal state is restored.
46 */
47
48#include "SYS.h"
49
50ENTRY(setjmp)
51	mov	%o0, %o3		/* Save our jmp_buf in %o3 */
52
53	mov	1, %o0			/* SIG_BLOCK */
54	mov	SYS_sigprocmask, %g1
55	clr	%o1			/* sigprocmask(SIG_BLOCK, 0) */
5699:	t	ST_SYSCALL
57	PINSYSCALL(SYS_sigprocmask, 99b)
58	stx	%o0, [%o3 + 0x10]
59
60	stx	%sp, [%o3 + 0x00]	/* store caller's stack pointer */
61	stx	%o7, [%o3 + 0x08]	/* ... and return pc */
62	retl
63	 clr	%o0			/* return 0 */
64
65ENTRY(longjmp)
66	save	%sp, -CC64FSZ, %sp
67	flushw
68
69	mov	3, %o0			/* SIG_SETMASK */
70	ldx	[%i0 + 0x10], %o1
71	mov	SYS_sigprocmask, %g1
7298:	t	ST_SYSCALL
73	PINSYSCALL(SYS_sigprocmask, 98b)
74
75	ldx	[%i0 + 0x00], %fp
76	ldx	[%i0 + 0x08], %i7
77	mov	1, %i0
78	movrnz	%i1, %i1, %i0		! compute v ? v : 1
79	ret
80	 restore
81