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_setjmp.S revision 1.4 
      1 /*-
      2  * Copyright (c) 1990 The Regents of the University of California.
      3  * All rights reserved.
      4  *
      5  * This code is derived from software contributed to Berkeley by
      6  * William Jolitz.
      7  *
      8  * Redistribution and use in source and binary forms, with or without
      9  * modification, are permitted provided that the following conditions
     10  * are met:
     11  * 1. Redistributions of source code must retain the above copyright
     12  *    notice, this list of conditions and the following disclaimer.
     13  * 2. Redistributions in binary form must reproduce the above copyright
     14  *    notice, this list of conditions and the following disclaimer in the
     15  *    documentation and/or other materials provided with the distribution.
     16  * 3. All advertising materials mentioning features or use of this software
     17  *    must display the following acknowledgement:
     18  *	This product includes software developed by the University of
     19  *	California, Berkeley and its contributors.
     20  * 4. Neither the name of the University nor the names of its contributors
     21  *    may be used to endorse or promote products derived from this software
     22  *    without specific prior written permission.
     23  *
     24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     34  * SUCH DAMAGE.
     35  *
     36  *	from: @(#)_setjmp.s	5.1 (Berkeley) 4/23/90
     37  *	$Id: _setjmp.S,v 1.4 1995/12/28 20:03:51 jtc Exp $
     38  */
     39 
     40 #include <machine/asm.h>
     41 
     42 #if defined(LIBC_SCCS)
     43 	.text
     44 	.asciz "$Id: _setjmp.S,v 1.4 1995/12/28 20:03:51 jtc Exp $"
     45 #endif
     46 
     47 /*
     48  * C library -- _setjmp, _longjmp
     49  *
     50  *	_longjmp(a,v)
     51  * will generate a "return(v)" from the last call to
     52  *	_setjmp(a)
     53  * by restoring registers from the stack.
     54  * The previous signal state is NOT restored.
     55  */
     56 
     57 ENTRY(_setjmp)
     58 	movl	4(%esp),%eax
     59 	movl	0(%esp),%edx
     60 	movl	%edx, 0(%eax)		/* rta */
     61 	movl	%ebx, 4(%eax)
     62 	movl	%esp, 8(%eax)
     63 	movl	%ebp,12(%eax)
     64 	movl	%esi,16(%eax)
     65 	movl	%edi,20(%eax)
     66 	xorl	%eax,%eax
     67 	ret
     68 
     69 ENTRY(_longjmp)
     70 	movl	4(%esp),%edx
     71 	movl	8(%esp),%eax
     72 	movl	0(%edx),%ecx
     73 	movl	4(%edx),%ebx
     74 	movl	8(%edx),%esp
     75 	movl	12(%edx),%ebp
     76 	movl	16(%edx),%esi
     77 	movl	20(%edx),%edi
     78 	testl	%eax,%eax
     79 	jnz	1f
     80 	incl	%eax
     81 1:	movl	%ecx,0(%esp)
     82 	ret
     83