sigsetjmp.S revision 287872 
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 * 4. 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 *	@(#)setjmp.s	5.1 (Berkeley) 4/23/90"
33 */
34
35#if defined(LIBC_SCCS) && !defined(lint)
36	.text
37	.asciz "$Id: sigsetjmp.S,v 1.1 1993/12/05 13:01:05 ats Exp $"
38#endif /* LIBC_SCCS and not lint */
39#include <machine/asm.h>
40__FBSDID("$FreeBSD: releng/10.2/lib/libc/amd64/gen/sigsetjmp.S 287872 2015-09-16 20:59:41Z delphij $");
41
42#include "SYS.h"
43
44/*-
45 * TODO:
46 *	Rename sigsetjmp to __sigsetjmp and siglongjmp to __siglongjmp,
47 *	remove the other *jmp functions and define everything in terms
48 *	of the renamed functions.  This requires compiler support for
49 *	the renamed functions (introduced in gcc-2.5.3; previous versions
50 *	only supported *jmp with 0 or 1 leading underscores).
51 *
52 *	Restore _all_ the registers and the signal mask atomically.  Can
53 *	use sigreturn() if sigreturn() works.
54 */
55
56ENTRY(sigsetjmp)
57	movl	%esi,88(%rdi)		/* 11; savemask */
58	testl	%esi,%esi
59	jz	2f
60	pushq	%rdi
61	movq	%rdi,%rcx
62	movq	$1,%rdi			/* SIG_BLOCK       */
63	movq	$0,%rsi			/* (sigset_t*)set  */
64	leaq	72(%rcx),%rdx		/* 9,10 (sigset_t*)oset */
65	/* stack is 16-byte aligned */
66	call	__libc_sigprocmask
67	popq	%rdi
682:	movq	%rdi,%rcx
69	movq	0(%rsp),%rdx		/* retval */
70	movq	%rdx, 0(%rcx)		/* 0; retval */
71	movq	%rbx, 8(%rcx)		/* 1; rbx */
72	movq	%rsp,16(%rcx)		/* 2; rsp */
73	movq	%rbp,24(%rcx)		/* 3; rbp */
74	movq	%r12,32(%rcx)		/* 4; r12 */
75	movq	%r13,40(%rcx)		/* 5; r13 */
76	movq	%r14,48(%rcx)		/* 6; r14 */
77	movq	%r15,56(%rcx)		/* 7; r15 */
78	fnstcw	64(%rcx)		/* 8; fpu cw */
79	xorq	%rax,%rax
80	ret
81END(sigsetjmp)
82
83	.weak CNAME(siglongjmp)
84	.set CNAME(siglongjmp),CNAME(__siglongjmp)
85ENTRY(__siglongjmp)
86	cmpl	$0,88(%rdi)
87	jz	2f
88	movq	%rdi,%rdx
89	pushq	%rdi
90	pushq	%rsi
91	movq	$3,%rdi			/* SIG_SETMASK     */
92	leaq	72(%rdx),%rsi		/* (sigset_t*)set  */
93	movq	$0,%rdx			/* (sigset_t*)oset */
94	subq	$0x8,%rsp		/* make the stack 16-byte aligned */
95	call	__libc_sigprocmask
96	addq	$0x8,%rsp
97	popq	%rsi
98	popq	%rdi			/* jmpbuf */
992:	movq	%rdi,%rdx
100	movq	%rsi,%rax		/* retval */
101	movq	0(%rdx),%rcx
102	movq	8(%rdx),%rbx
103	movq	16(%rdx),%rsp
104	movq	24(%rdx),%rbp
105	movq	32(%rdx),%r12
106	movq	40(%rdx),%r13
107	movq	48(%rdx),%r14
108	movq	56(%rdx),%r15
109	fninit
110	fldcw	64(%rdx)
111	testq	%rax,%rax
112	jnz	1f
113	incq	%rax
1141:	movq	%rcx,0(%rsp)
115	ret
116END(__siglongjmp)
117
118	.section .note.GNU-stack,"",%progbits
119