| /* |
| * 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, write to the Free Software |
| * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| */ |
| |
| /* 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. |
| * |
| */ |
| |
| ENTRY(grub_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(grub_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.... */ |
