summaryrefslogtreecommitdiff
path: root/libc/sysdeps/linux/arm/bsd-_setjmp.S
blob: a05570df77ff697a1953e352c55102e0d16feded (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
/* BSD `_setjmp' entry point to `sigsetjmp (..., 0)'.  ARM version.
   Copyright (C) 1997, 1998 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, write to the Free
   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   02111-1307 USA.  */

#include <bits/arm_asm.h>

/* This just does a tail-call to `__sigsetjmp (ARG, 0)'.
   We cannot do it in C because it must be a tail-call, so frame-unwinding
   in setjmp doesn't clobber the state restored by longjmp.  */

.global _setjmp
.type _setjmp,%function
.align 2
#if defined(THUMB1_ONLY)
.thumb_func
_setjmp:
	mov	r1, #0
#ifdef __PIC__
	ldr	r3, .L_GOT
	adr	r2, .L_GOT
	add	r3, r2, r3

	ldr	r2, .L_GOT+4	/* __sigsetjmp */
	ldr	r2, [r2, r3]
	bx	r2

	.align 2
.L_GOT:
	.word	_GLOBAL_OFFSET_TABLE_-.L_GOT
	.word	__sigsetjmp(GOT)
#else
	ldr	r2, =__sigsetjmp
	bx	r2
.pool
#endif
#else
_setjmp:
	mov	r1, #0
#ifdef __PIC__
	b	__sigsetjmp(PLT)
#else
	b	__sigsetjmp
#endif
#endif

.size _setjmp,.-_setjmp