1/*
2 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
3 *
4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
5 *
6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. The rights granted to you under the License
10 * may not be used to create, or enable the creation or redistribution of,
11 * unlawful or unlicensed copies of an Apple operating system, or to
12 * circumvent, violate, or enable the circumvention or violation of, any
13 * terms of an Apple operating system software license agreement.
14 *
15 * Please obtain a copy of the License at
16 * http://www.opensource.apple.com/apsl/ and read it before using this file.
17 *
18 * The Original Code and all software distributed under the License are
19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
23 * Please see the License for the specific language governing rights and
24 * limitations under the License.
25 *
26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
27 */
28/*
29 * @OSF_COPYRIGHT@
30 */
31/*
32 * Mach Operating System
33 * Copyright (c) 1991,1990,1989 Carnegie Mellon University
34 * All Rights Reserved.
35 *
36 * Permission to use, copy, modify and distribute this software and its
37 * documentation is hereby granted, provided that both the copyright
38 * notice and this permission notice appear in all copies of the
39 * software, derivative works or modified versions, and any portions
40 * thereof, and that both notices appear in supporting documentation.
41 *
42 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
43 * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
44 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
45 *
46 * Carnegie Mellon requests users of this software to return to
47 *
48 *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
49 *  School of Computer Science
50 *  Carnegie Mellon University
51 *  Pittsburgh PA 15213-3890
52 *
53 * any improvements or extensions that they make and grant Carnegie Mellon
54 * the rights to redistribute these changes.
55 */
56/*
57 */
58
59/*
60 * C library -- _setjmp, _longjmp
61 *
62 *	_longjmp(a,v)
63 * will generate a "return(v)" from
64 * the last call to
65 *	_setjmp(a)
66 * by restoring registers from the stack,
67 * The previous signal state is NOT restored.
68 *
69 */
70
71#include <i386/asm.h>
72
73ENTRY(_setjmp)
74	movl	4(%esp),%ecx		# fetch buffer
75	movl	%ebx,0(%ecx)
76	movl	%esi,4(%ecx)
77	movl	%edi,8(%ecx)
78	movl	%ebp,12(%ecx)		# save frame pointer of caller
79	popl	%edx
80	movl	%esp,16(%ecx)		# save stack pointer of caller
81	movl	%edx,20(%ecx)		# save pc of caller
82	xorl	%eax,%eax
83        jmp     *%edx
84
85ENTRY(_longjmp)
86	movl	8(%esp),%eax		# return(v)
87	movl	4(%esp),%ecx		# fetch buffer
88	movl	0(%ecx),%ebx
89	movl	4(%ecx),%esi
90	movl	8(%ecx),%edi
91	movl	12(%ecx),%ebp
92	movl	16(%ecx),%esp
93	orl	%eax,%eax
94	jnz	0f
95	incl	%eax
960:	jmp	*20(%ecx)		# done, return....
97