1 /* $OpenBSD: setjmp.S,v 1.3 2003/06/02 23:28:08 millert Exp $ */
2 /* $NetBSD: setjmp.S,v 1.5 1994/10/26 06:39:14 cgd Exp $ */
3
4 /*-
5 * Copyright (c) 1990 The Regents of the University of California.
6 * All rights reserved.
7 *
8 * This code is derived from software contributed to Berkeley by
9 * William Jolitz.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 *
35 * @(#)setjmp.s 5.1 (Berkeley) 4/23/90
36 */
37
38 /*
39 * C library -- _setjmp, _longjmp
40 *
41 * longjmp(a,v)
42 * will generate a "return(v)" from the last call to
43 * setjmp(a)
44 * by restoring registers from the stack.
45 * The previous signal state is restored.
46 */
47
48 #include "DEFS.h"
49 #include "SYS.h"
50
51 ENTRY(setjmp)
52 pushl $0
53 call PIC_PLT(_sigblock)
54 popl %edx
55 movl 4(%esp),%ecx
56 movl 0(%esp),%edx
57 movl %edx, 0(%ecx)
58 movl %ebx, 4(%ecx)
59 movl %esp, 8(%ecx)
60 movl %ebp,12(%ecx)
61 movl %esi,16(%ecx)
62 movl %edi,20(%ecx)
63 movl %eax,24(%ecx)
64 xorl %eax,%eax
65 ret
66
67 ENTRY(longjmp)
68 movl 4(%esp),%edx
69 pushl 24(%edx)
70 call PIC_PLT(_sigsetmask)
71 popl %eax
72 movl 4(%esp),%edx
73 movl 8(%esp),%eax
74 movl 0(%edx),%ecx
75 movl 4(%edx),%ebx
76 movl 8(%edx),%esp
77 movl 12(%edx),%ebp
78 movl 16(%edx),%esi
79 movl 20(%edx),%edi
80 testl %eax,%eax
81 jnz 1f
82 incl %eax
83 1: movl %ecx,0(%esp)
84 ret