sigsetjmp.S revision 5245 
1/*-
2 * Copyright (c) 1990 The Regents of the University of California.
3 * 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. All advertising materials mentioning features or use of this software
17 *    must display the following acknowledgement:
18 *	This product includes software developed by the University of
19 *	California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 *    may be used to endorse or promote products derived from this software
22 *    without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * 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 *
37 *	from: @(#)setjmp.s	5.1 (Berkeley) 4/23/90"
38 *	$Id: sigsetjmp.S,v 1.2 1994/10/25 14:08:13 bde Exp $
39 */
40
41#if defined(LIBC_SCCS) && !defined(lint)
42	.asciz "$Id: sigsetjmp.S,v 1.2 1994/10/25 14:08:13 bde Exp $"
43#endif /* LIBC_SCCS and not lint */
44
45#include "DEFS.h"
46#include "SYS.h"
47
48/*-
49 * TODO:
50 *	Rename sigsetjmp to __sigsetjmp and siglongjmp to __siglongjmp,
51 *	remove the other *jmp functions and define everything in terms
52 *	of the renamed functions.  This requires compiler support for
53 *	the renamed functions (introduced in gcc-2.5.3; previous versions
54 *	only supported *jmp with 0 or 1 leading underscores).
55 *
56 *	Use sigprocmask() instead of sigblock() and sigsetmask(), and
57 *	check for and handle errors.
58 *
59 *	Restore _all_ the registers and the signal mask atomically.  Can
60 *	use sigreturn() if sigreturn() works.
61 */
62
63ENTRY(sigsetjmp)
64	movl	8(%esp),%eax
65	movl	4(%esp),%ecx
66	movl	%eax,32(%ecx)
67	testl	%eax,%eax
68	jz	1f
69	pushl	$0
70	call	PIC_PLT(_sigblock)
71	addl	$4,%esp
72	movl	4(%esp),%ecx
73	movl	%eax,24(%ecx)
741:	movl	0(%esp),%edx
75	movl	%edx, 0(%ecx)
76	movl	%ebx, 4(%ecx)
77	movl	%esp, 8(%ecx)
78	movl	%ebp,12(%ecx)
79	movl	%esi,16(%ecx)
80	movl	%edi,20(%ecx)
81	fnstcw	28(%ecx)
82	xorl	%eax,%eax
83	ret
84
85ENTRY(siglongjmp)
86	movl	4(%esp),%edx
87	cmpl	$0,32(%edx)
88	jz	1f
89	pushl	24(%edx)
90	call	PIC_PLT(_sigsetmask)
91	addl	$4,%esp
921:	movl	4(%esp),%edx
93	movl	8(%esp),%eax
94	movl	0(%edx),%ecx
95	movl	4(%edx),%ebx
96	movl	8(%edx),%esp
97	movl	12(%edx),%ebp
98	movl	16(%edx),%esi
99	movl	20(%edx),%edi
100	fninit
101	fldcw	28(%edx)
102	testl	%eax,%eax
103	jnz	2f
104	incl	%eax
1052:	movl	%ecx,0(%esp)
106	ret
107