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/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2000 Free Software Foundation, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
/* This is stolen from libc/x86/setjmp.S in the OSKit */
/*
* 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.
*
*/
#define EXT_C(sym) sym
#define FUNCTION(x) .globl EXT_C(x) ; .type EXT_C(x), @function ; EXT_C(x):
.file "setjmp.S"
.text
FUNCTION(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
FUNCTION(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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