Annotation of sys/lib/libkern/arch/i386/setjmp.S, Revision 1.1.1.1
1.1 nbrk 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
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