about summary refs log tree commit diff
path: root/sysdeps/x86_64/bsd-setjmp.S
blob: b2b2b383f12af8799523d702aaa14a4c0f669887 (plain) (blame)
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
/* BSD `setjmp' entry point to `sigsetjmp (..., 1)'.  x86-64 version.
   Copyright (C) 1994-2021 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, see
   <https://www.gnu.org/licenses/>.  */

/* This just does a tail-call to `__sigsetjmp (ARG, 1)'.
   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.  */

#include <sysdep.h>
#define _ASM
#define _SETJMP_H
#include <bits/setjmp.h>

ENTRY (setjmp)
	/* Set up arguments, we only need to set the 2nd arg.  */
	movl $1, %esi
#ifdef	PIC
	jmp HIDDEN_JUMPTARGET (__sigsetjmp)
#else
	jmp __sigsetjmp
#endif
END (setjmp)