_setjmp.S revision 21673 
117680Spst/*-
217680Spst * Copyright (c) 1990 The Regents of the University of California.
317680Spst * All rights reserved.
417680Spst *
517680Spst * This code is derived from software contributed to Berkeley by
617680Spst * William Jolitz.
717680Spst *
817680Spst * Redistribution and use in source and binary forms, with or without
917680Spst * modification, are permitted provided that the following conditions
1017680Spst * are met:
1117680Spst * 1. Redistributions of source code must retain the above copyright
1217680Spst *    notice, this list of conditions and the following disclaimer.
1317680Spst * 2. Redistributions in binary form must reproduce the above copyright
1417680Spst *    notice, this list of conditions and the following disclaimer in the
1517680Spst *    documentation and/or other materials provided with the distribution.
1617680Spst * 3. All advertising materials mentioning features or use of this software
1717680Spst *    must display the following acknowledgement:
1817680Spst *	This product includes software developed by the University of
1917680Spst *	California, Berkeley and its contributors.
2017680Spst * 4. Neither the name of the University nor the names of its contributors
21190207Srpaulo *    may be used to endorse or promote products derived from this software
2217680Spst *    without specific prior written permission.
2317680Spst *
2417680Spst * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
2517680Spst * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
2675115Sfenner * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
2717680Spst * 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 *	$FreeBSD: head/lib/libc/amd64/gen/_setjmp.S 21673 1997-01-14 07:20:47Z jkh $
37 */
38
39#if defined(LIBC_RCS) && !defined(lint)
40	.text
41	.asciz "$FreeBSD: head/lib/libc/amd64/gen/_setjmp.S 21673 1997-01-14 07:20:47Z jkh $"
42#endif /* LIBC_RCS and not lint */
43
44/*
45 * C library -- _setjmp, _longjmp
46 *
47 *	_longjmp(a,v)
48 * will generate a "return(v)" from the last call to
49 *	_setjmp(a)
50 * by restoring registers from the environment 'a'.
51 * The previous signal state is NOT restored.
52 */
53
54#include "DEFS.h"
55
56#ifdef _THREAD_SAFE
57ENTRY(__thread_sys_setjmp)
58#else
59ENTRY(_setjmp)
60#endif
61	movl	4(%esp),%eax
62	movl	0(%esp),%edx
63	movl	%edx, 0(%eax)		/* rta */
64	movl	%ebx, 4(%eax)
65	movl	%esp, 8(%eax)
66	movl	%ebp,12(%eax)
67	movl	%esi,16(%eax)
68	movl	%edi,20(%eax)
69	fnstcw	28(%eax)
70	xorl	%eax,%eax
71	ret
72
73#ifdef _THREAD_SAFE
74ENTRY(__thread_sys_longjmp)
75#else
76ENTRY(_longjmp)
77#endif
78	movl	4(%esp),%edx
79	movl	8(%esp),%eax
80	movl	0(%edx),%ecx
81	movl	4(%edx),%ebx
82	movl	8(%edx),%esp
83	movl	12(%edx),%ebp
84	movl	16(%edx),%esi
85	movl	20(%edx),%edi
86	fninit
87	fldcw	28(%edx)
88	testl	%eax,%eax
89	jnz	1f
90	incl	%eax
911:	movl	%ecx,0(%esp)
92	ret
93