setjmp.S revision 1.2 
1/*-
2 * Copyright (c) 1990 The Regents of the University of California.
3 * All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * William Jolitz.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 *    must display the following acknowledgement:
18 *	This product includes software developed by the University of
19 *	California, Berkeley and its contributors.
20 * 4. 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 *	from: @(#)setjmp.s	5.1 (Berkeley) 4/23/90
37 *	$Id: setjmp.S,v 1.2 1995/12/30 08:15:23 deraadt Exp $
38 */
39
40#include <machine/asm.h>
41
42#if defined(LIBC_SCCS)
43	.text
44	.asciz "$Id: setjmp.S,v 1.2 1995/12/30 08:15:23 deraadt Exp $"
45#endif
46
47/*
48 * C library -- _setjmp, _longjmp
49 *
50 *	longjmp(a,v)
51 * will generate a "return(v)" from the last call to
52 *	setjmp(a)
53 * by restoring registers from the stack.
54 * The previous signal state is restored.
55 */
56
57ENTRY(setjmp)
58	pushl	$0
59#ifdef PIC
60	call	PIC_PLT(_sigblock)
61#else
62	call	_sigblock
63#endif
64	addl	$4,%esp
65	movl	4(%esp),%ecx
66	movl	0(%esp),%edx
67	movl	%edx, 0(%ecx)
68	movl	%ebx, 4(%ecx)
69	movl	%esp, 8(%ecx)
70	movl	%ebp,12(%ecx)
71	movl	%esi,16(%ecx)
72	movl	%edi,20(%ecx)
73	movl	%eax,24(%ecx)
74	xorl	%eax,%eax
75	ret
76
77ENTRY(longjmp)
78	movl	4(%esp),%edx
79	pushl	24(%edx)
80#ifdef PIC
81	call	PIC_PLT(_sigsetmask)
82#else
83	call	_sigsetmask
84#endif
85	addl	$4,%esp
86	movl	4(%esp),%edx
87	movl	8(%esp),%eax
88	movl	0(%edx),%ecx
89	movl	4(%edx),%ebx
90	movl	8(%edx),%esp
91	movl	12(%edx),%ebp
92	movl	16(%edx),%esi
93	movl	20(%edx),%edi
94	testl	%eax,%eax
95	jnz	1f
96	incl	%eax
971:	movl	%ecx,0(%esp)
98	ret
99