i386/gen/_setjmp.S

1.5  christos /*	$NetBSD: _setjmp.S,v 1.5 1997/07/16 14:37:13 christos Exp $	*/
1.5  christos
1.1       cgd /*-
1.1       cgd  * Copyright (c) 1990 The Regents of the University of California.
1.1       cgd  * All rights reserved.
1.1       cgd  *
1.1       cgd  * This code is derived from software contributed to Berkeley by
1.1       cgd  * William Jolitz.
1.1       cgd  *
1.1       cgd  * Redistribution and use in source and binary forms, with or without
1.1       cgd  * modification, are permitted provided that the following conditions
1.1       cgd  * are met:
1.1       cgd  * 1. Redistributions of source code must retain the above copyright
1.1       cgd  *    notice, this list of conditions and the following disclaimer.
1.1       cgd  * 2. Redistributions in binary form must reproduce the above copyright
1.1       cgd  *    notice, this list of conditions and the following disclaimer in the
1.1       cgd  *    documentation and/or other materials provided with the distribution.
1.1       cgd  * 3. All advertising materials mentioning features or use of this software
1.1       cgd  *    must display the following acknowledgement:
1.1       cgd  *	This product includes software developed by the University of
1.1       cgd  *	California, Berkeley and its contributors.
1.1       cgd  * 4. Neither the name of the University nor the names of its contributors
1.1       cgd  *    may be used to endorse or promote products derived from this software
1.1       cgd  *    without specific prior written permission.
1.1       cgd  *
1.1       cgd  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
1.1       cgd  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
1.1       cgd  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
1.1       cgd  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
1.1       cgd  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
1.1       cgd  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
1.1       cgd  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
1.1       cgd  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
1.1       cgd  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
1.1       cgd  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
1.1       cgd  * SUCH DAMAGE.
1.3       jtc  *
1.3       jtc  *	from: @(#)_setjmp.s	5.1 (Berkeley) 4/23/90
1.1       cgd  */
1.1       cgd
1.4       jtc #include <machine/asm.h>
1.3       jtc #if defined(LIBC_SCCS)
1.5  christos 	RCSID("$NetBSD: _setjmp.S,v 1.5 1997/07/16 14:37:13 christos Exp $")
1.3       jtc #endif
1.1       cgd
1.1       cgd /*
1.1       cgd  * C library -- _setjmp, _longjmp
1.1       cgd  *
1.1       cgd  *	_longjmp(a,v)
1.1       cgd  * will generate a "return(v)" from the last call to
1.1       cgd  *	_setjmp(a)
1.1       cgd  * by restoring registers from the stack.
1.1       cgd  * The previous signal state is NOT restored.
1.1       cgd  */
1.1       cgd
1.1       cgd ENTRY(_setjmp)
1.1       cgd 	movl	4(%esp),%eax
1.1       cgd 	movl	0(%esp),%edx
1.1       cgd 	movl	%edx, 0(%eax)		/* rta */
1.1       cgd 	movl	%ebx, 4(%eax)
1.1       cgd 	movl	%esp, 8(%eax)
1.1       cgd 	movl	%ebp,12(%eax)
1.1       cgd 	movl	%esi,16(%eax)
1.1       cgd 	movl	%edi,20(%eax)
1.2       jtc 	xorl	%eax,%eax
1.1       cgd 	ret
1.1       cgd
1.1       cgd ENTRY(_longjmp)
1.1       cgd 	movl	4(%esp),%edx
1.1       cgd 	movl	8(%esp),%eax
1.1       cgd 	movl	0(%edx),%ecx
1.1       cgd 	movl	4(%edx),%ebx
1.1       cgd 	movl	8(%edx),%esp
1.1       cgd 	movl	12(%edx),%ebp
1.1       cgd 	movl	16(%edx),%esi
1.1       cgd 	movl	20(%edx),%edi
1.2       jtc 	testl	%eax,%eax
1.2       jtc 	jnz	1f
1.2       jtc 	incl	%eax
1.1       cgd 1:	movl	%ecx,0(%esp)
1.1       cgd 	ret