176d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman/* 276d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman * GRUB -- GRand Unified Bootloader 376d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman * Copyright (C) 2000 Free Software Foundation, Inc. 476d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman * 576d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman * This program is free software; you can redistribute it and/or modify 676d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman * it under the terms of the GNU General Public License as published by 776d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman * the Free Software Foundation; either version 2 of the License, or 876d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman * (at your option) any later version. 976d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman * 1076d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman * This program is distributed in the hope that it will be useful, 1176d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman * but WITHOUT ANY WARRANTY; without even the implied warranty of 1276d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 1376d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman * GNU General Public License for more details. 1476d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman * 1576d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman * You should have received a copy of the GNU General Public License 1676d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman * along with this program; if not, see <http://www.gnu.org/licenses/>. 1776d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman */ 1876d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman 1976d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman/* This is stolen from libc/x86/setjmp.S in the OSKit */ 2076d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman/* 2176d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman * Mach Operating System 2276d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman * Copyright (c) 1991,1990,1989 Carnegie Mellon University 2376d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman * All Rights Reserved. 2476d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman * 2576d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman * Permission to use, copy, modify and distribute this software and its 2676d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman * documentation is hereby granted, provided that both the copyright 2776d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman * notice and this permission notice appear in all copies of the 2876d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman * software, derivative works or modified versions, and any portions 2976d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman * thereof, and that both notices appear in supporting documentation. 3076d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman * 3176d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 3276d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR 3376d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 3476d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman * 3576d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman * Carnegie Mellon requests users of this software to return to 3676d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman * 3776d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 3876d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman * School of Computer Science 3976d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman * Carnegie Mellon University 4076d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman * Pittsburgh PA 15213-3890 4176d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman * 4276d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman * any improvements or extensions that they make and grant Carnegie Mellon 4376d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman * the rights to redistribute these changes. 4476d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman */ 4576d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman/* 4676d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman * C library -- _setjmp, _longjmp 4776d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman * 4876d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman * _longjmp(a,v) 4976d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman * will generate a "return(v)" from 5076d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman * the last call to 5176d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman * _setjmp(a) 5276d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman * by restoring registers from the stack, 5376d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman * The previous signal state is NOT restored. 5476d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman * 5576d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman */ 5676d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman 5776d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman#define EXT_C(sym) sym 5876d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman#define FUNCTION(x) .globl EXT_C(x) ; .type EXT_C(x), @function ; EXT_C(x): 5976d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman 6076d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman .file "setjmp.S" 6176d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman 6276d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman .text 6376d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman 6476d05dc695b06c4e987bb8078f78032441e1430cGreg HartmanFUNCTION(setjmp) 6576d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman movl 4(%esp), %ecx /* fetch buffer */ 6676d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman movl %ebx, 0(%ecx) 6776d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman movl %esi, 4(%ecx) 6876d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman movl %edi, 8(%ecx) 6976d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman movl %ebp, 12(%ecx) /* save frame pointer of caller */ 7076d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman popl %edx 7176d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman movl %esp, 16(%ecx) /* save stack pointer of caller */ 7276d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman movl %edx, 20(%ecx) /* save pc of caller */ 7376d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman xorl %eax, %eax 7476d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman jmp *%edx 7576d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman 7676d05dc695b06c4e987bb8078f78032441e1430cGreg HartmanFUNCTION(longjmp) 7776d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman movl 8(%esp), %eax /* return(v) */ 7876d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman movl 4(%esp), %ecx /* fetch buffer */ 7976d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman movl 0(%ecx), %ebx 8076d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman movl 4(%ecx), %esi 8176d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman movl 8(%ecx), %edi 8276d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman movl 12(%ecx), %ebp 8376d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman movl 16(%ecx), %esp 8476d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman orl %eax, %eax 8576d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman jnz 0f 8676d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman incl %eax 8776d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman0: jmp *20(%ecx) /* done, return.... */ 88