minix/lib/libc/arch/i386/gen/setjmp.S
2013-01-08 15:47:37 +00:00

118 lines
3.1 KiB
ArmAsm

/* $NetBSD: setjmp.S,v 1.14 2005/09/13 01:44:08 christos Exp $ */
/*-
* 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. 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.
*
* from: @(#)setjmp.s 5.1 (Berkeley) 4/23/90
*/
#include <machine/asm.h>
#if defined(LIBC_SCCS)
RCSID("$NetBSD: setjmp.S,v 1.14 2005/09/13 01:44:08 christos Exp $")
#endif
/*
* C library -- _setjmp, _longjmp
*
* longjmp(a,v)
* will generate a "return(v)" from the last call to
* setjmp(a)
* by restoring registers from the stack.
* The previous signal state is restored.
*/
ENTRY(__setjmp14)
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)
/* Get the signal mask. */
leal 24(%ecx),%edx
PIC_PROLOGUE
pushl %edx
pushl $0
pushl $0
#ifdef PIC
call PIC_PLT(_C_LABEL(__sigprocmask14))
#else
call _C_LABEL(__sigprocmask14)
#endif
addl $12,%esp
PIC_EPILOGUE
xorl %eax,%eax
ret
ENTRY(__longjmp14)
/* Restore the signal mask. */
movl 4(%esp),%ecx
leal 24(%ecx),%edx
PIC_PROLOGUE
pushl $0
pushl %edx
#ifdef __minix
pushl $2 /* SIG_SETMASK */
#else
pushl $3 /* SIG_SETMASK */
#endif
#ifdef PIC
call PIC_PLT(_C_LABEL(__sigprocmask14))
#else
call _C_LABEL(__sigprocmask14)
#endif
addl $12,%esp
PIC_EPILOGUE
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
testl %eax,%eax
jnz 1f
incl %eax
1: movl %ecx,0(%esp)
ret
#ifdef __minix
.weak longjmp; sigsetjmp = __longjmp14
.weak setjmp; sigsetjmp = __setjmp14
#endif