xref: /freebsd/lib/libc/amd64/gen/sigsetjmp.S (revision 6990ffd8a95caaba6858ad44ff1b3157d1efba8f)
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#if defined(LIBC_RCS) && !defined(lint)
38	.text
39	.asciz "$FreeBSD$"
40#endif /* LIBC_RCS and not lint */
41
42#include "DEFS.h"
43#include "SYS.h"
44
45/*-
46 * TODO:
47 *	Rename sigsetjmp to __sigsetjmp and siglongjmp to __siglongjmp,
48 *	remove the other *jmp functions and define everything in terms
49 *	of the renamed functions.  This requires compiler support for
50 *	the renamed functions (introduced in gcc-2.5.3; previous versions
51 *	only supported *jmp with 0 or 1 leading underscores).
52 *
53 *	Restore _all_ the registers and the signal mask atomically.  Can
54 *	use sigreturn() if sigreturn() works.
55 */
56
57ENTRY(sigsetjmp)
58	movl	8(%esp),%eax
59	movl	4(%esp),%ecx
60	movl	%eax,44(%ecx)
61	testl	%eax,%eax
62	jz	2f
63	PIC_PROLOGUE
64	leal	28(%ecx), %eax
65	pushl	%eax			/* (sigset_t*)oset */
66	pushl	$0			/* (sigset_t*)set  */
67	pushl	$1			/* SIG_BLOCK       */
68	call	PIC_PLT(CNAME(_sigprocmask))
69	addl	$12,%esp
70	PIC_EPILOGUE
71	movl	4(%esp),%ecx
722:	movl	0(%esp),%edx
73	movl	%edx, 0(%ecx)
74	movl	%ebx, 4(%ecx)
75	movl	%esp, 8(%ecx)
76	movl	%ebp,12(%ecx)
77	movl	%esi,16(%ecx)
78	movl	%edi,20(%ecx)
79	fnstcw	24(%ecx)
80	xorl	%eax,%eax
81	ret
82
83	.weak CNAME(siglongjmp);
84	.set CNAME(siglongjmp),CNAME(__siglongjmp);
85ENTRY(__siglongjmp);
86	movl	4(%esp),%edx
87	cmpl	$0,44(%edx)
88	jz	2f
89	PIC_PROLOGUE
90	pushl	$0			/* (sigset_t*)oset */
91	leal	28(%edx), %eax
92	pushl	%eax			/* (sigset_t*)set  */
93	pushl	$3			/* SIG_SETMASK     */
94	call	PIC_PLT(CNAME(_sigprocmask))
95	addl	$12,%esp
96	PIC_EPILOGUE
97	movl	4(%esp),%edx
982:	movl	8(%esp),%eax
99	movl	0(%edx),%ecx
100	movl	4(%edx),%ebx
101	movl	8(%edx),%esp
102	movl	12(%edx),%ebp
103	movl	16(%edx),%esi
104	movl	20(%edx),%edi
105	fninit
106	fldcw	24(%edx)
107	testl	%eax,%eax
108	jnz	1f
109	incl	%eax
1101:	movl	%ecx,0(%esp)
111	ret
112