Annotation of prex-old/usr/arch/i386/setjmp.S, Revision 1.1.1.1
1.1 nbrk 1: /*-
2: * Copyright (c) 1990, 1993
3: * The Regents of the University of California. 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. Neither the name of the University nor the names of its contributors
17: * may be used to endorse or promote products derived from this software
18: * without specific prior written permission.
19: *
20: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30: * SUCH DAMAGE.
31: */
32:
33: /*
34: * C library -- _setjmp, _longjmp
35: *
36: * longjmp(a,v)
37: * will generate a "return(v)" from the last call to
38: * setjmp(a)
39: * by restoring registers from the stack.
40: * The previous signal state is restored.
41: */
42:
43: /* #include "DEFS.h" */
44: #include <machine/asm.h>
45:
46: ENTRY(setjmp)
47: pushl $0
48: call sigblock
49: popl %edx
50: movl 4(%esp),%ecx
51: movl 0(%esp),%edx
52: movl %edx, 0(%ecx)
53: movl %ebx, 4(%ecx)
54: movl %esp, 8(%ecx)
55: movl %ebp,12(%ecx)
56: movl %esi,16(%ecx)
57: movl %edi,20(%ecx)
58: movl %eax,24(%ecx)
59: movl $0,%eax
60: ret
61:
62: ENTRY(longjmp)
63: movl 4(%esp),%edx
64: pushl 24(%edx)
65: call sigsetmask
66: popl %eax
67: movl 4(%esp),%edx
68: movl 8(%esp),%eax
69: movl 0(%edx),%ecx
70: movl 4(%edx),%ebx
71: movl 8(%edx),%esp
72: movl 12(%edx),%ebp
73: movl 16(%edx),%esi
74: movl 20(%edx),%edi
75: cmpl $0,%eax
76: jne 1f
77: movl $1,%eax
78: 1: movl %ecx,0(%esp)
79: ret
CVSweb