freebsd-dev/lib/libc/amd64/gen/setjmp.S
Julian Elischer f70177e76e Reviewed by: julian and (hsu?)
Submitted by:	 John Birrel(L?)

changes for threadsafe operations
1996-01-22 00:02:33 +00:00

110 lines
3.2 KiB
ArmAsm

/*-
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* William Jolitz.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: setjmp.S,v 1.3 1995/01/23 01:27:08 davidg Exp $
*/
#if defined(LIBC_RCS) && !defined(lint)
.text
.asciz "$Id: setjmp.S,v 1.3 1995/01/23 01:27:08 davidg Exp $"
#endif /* LIBC_RCS and not lint */
/*
* C library -- _setjmp, _longjmp
*
* longjmp(a,v)
* will generate a "return(v)" from the last call to
* setjmp(a)
* by restoring registers from the environment 'a'.
* The previous signal state is restored.
*/
#include "DEFS.h"
#include "SYS.h"
#ifdef _THREAD_SAFE
ENTRY(_thread_sys_setjmp)
#else
ENTRY(setjmp)
#endif
pushl $0
#ifdef _THREAD_SAFE
call PIC_PLT(__thread_sys_sigblock)
#else
call PIC_PLT(_sigblock)
#endif
popl %edx
movl 4(%esp),%ecx
movl 0(%esp),%edx
movl %edx, 0(%ecx)
movl %ebx, 4(%ecx)
movl %esp, 8(%ecx)
movl %ebp,12(%ecx)
movl %esi,16(%ecx)
movl %edi,20(%ecx)
movl %eax,24(%ecx)
fnstcw 28(%ecx)
xorl %eax,%eax
ret
#ifdef _THREAD_SAFE
ENTRY(_thread_sys_longjmp)
#else
ENTRY(longjmp)
#endif
movl 4(%esp),%edx
pushl 24(%edx)
#ifdef _THREAD_SAFE
call PIC_PLT(__thread_sys_sigsetmask)
#else
call PIC_PLT(_sigsetmask) /* XXX this is not reentrant */
#endif
popl %eax
movl 4(%esp),%edx
movl 8(%esp),%eax
movl 0(%edx),%ecx
movl 4(%edx),%ebx
movl 8(%edx),%esp
movl 12(%edx),%ebp
movl 16(%edx),%esi
movl 20(%edx),%edi
fninit
fldcw 28(%edx)
testl %eax,%eax
jnz 1f
incl %eax
1: movl %ecx,0(%esp)
ret