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/*
* Mach Operating System
* Copyright (c) 1991,1990,1989 Carnegie Mellon University
* All Rights Reserved.
*
* Permission to use, copy, modify and distribute this software and its
* documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie Mellon
* the rights to redistribute these changes.
*/
/*
* 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 NOT restored.
*
*/
#include <mach/machine/asm.h>
ENTRY(_setjmp)
movl 4(%esp),%ecx /* fetch buffer */
movl %ebx,0(%ecx)
movl %esi,4(%ecx)
movl %edi,8(%ecx)
movl %ebp,12(%ecx) /* save frame pointer of caller */
popl %edx
movl %esp,16(%ecx) /* save stack pointer of caller */
movl %edx,20(%ecx) /* save pc of caller */
xorl %eax,%eax
jmp *%edx
ENTRY(_longjmp)
movl 8(%esp),%eax /* return(v) */
movl 4(%esp),%ecx /* fetch buffer */
movl 0(%ecx),%ebx
movl 4(%ecx),%esi
movl 8(%ecx),%edi
movl 12(%ecx),%ebp
movl 16(%ecx),%esp
orl %eax,%eax
jnz 0f
incl %eax
0: jmp *20(%ecx) /* done, return.... */
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