17c478bd9Sstevel@tonic-gate/* 27c478bd9Sstevel@tonic-gate * GRUB -- GRand Unified Bootloader 37c478bd9Sstevel@tonic-gate * Copyright (C) 2000 Free Software Foundation, Inc. 47c478bd9Sstevel@tonic-gate * 57c478bd9Sstevel@tonic-gate * This program is free software; you can redistribute it and/or modify 67c478bd9Sstevel@tonic-gate * it under the terms of the GNU General Public License as published by 77c478bd9Sstevel@tonic-gate * the Free Software Foundation; either version 2 of the License, or 87c478bd9Sstevel@tonic-gate * (at your option) any later version. 97c478bd9Sstevel@tonic-gate * 107c478bd9Sstevel@tonic-gate * This program is distributed in the hope that it will be useful, 117c478bd9Sstevel@tonic-gate * but WITHOUT ANY WARRANTY; without even the implied warranty of 127c478bd9Sstevel@tonic-gate * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 137c478bd9Sstevel@tonic-gate * GNU General Public License for more details. 147c478bd9Sstevel@tonic-gate * 157c478bd9Sstevel@tonic-gate * You should have received a copy of the GNU General Public License 167c478bd9Sstevel@tonic-gate * along with this program; if not, write to the Free Software 177c478bd9Sstevel@tonic-gate * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 187c478bd9Sstevel@tonic-gate */ 197c478bd9Sstevel@tonic-gate 207c478bd9Sstevel@tonic-gate/* This is stolen from libc/x86/setjmp.S in the OSKit */ 217c478bd9Sstevel@tonic-gate/* 227c478bd9Sstevel@tonic-gate * Mach Operating System 237c478bd9Sstevel@tonic-gate * Copyright (c) 1991,1990,1989 Carnegie Mellon University 247c478bd9Sstevel@tonic-gate * All Rights Reserved. 257c478bd9Sstevel@tonic-gate * 267c478bd9Sstevel@tonic-gate * Permission to use, copy, modify and distribute this software and its 277c478bd9Sstevel@tonic-gate * documentation is hereby granted, provided that both the copyright 287c478bd9Sstevel@tonic-gate * notice and this permission notice appear in all copies of the 297c478bd9Sstevel@tonic-gate * software, derivative works or modified versions, and any portions 307c478bd9Sstevel@tonic-gate * thereof, and that both notices appear in supporting documentation. 317c478bd9Sstevel@tonic-gate * 327c478bd9Sstevel@tonic-gate * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 337c478bd9Sstevel@tonic-gate * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR 347c478bd9Sstevel@tonic-gate * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 357c478bd9Sstevel@tonic-gate * 367c478bd9Sstevel@tonic-gate * Carnegie Mellon requests users of this software to return to 377c478bd9Sstevel@tonic-gate * 387c478bd9Sstevel@tonic-gate * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 397c478bd9Sstevel@tonic-gate * School of Computer Science 407c478bd9Sstevel@tonic-gate * Carnegie Mellon University 417c478bd9Sstevel@tonic-gate * Pittsburgh PA 15213-3890 427c478bd9Sstevel@tonic-gate * 437c478bd9Sstevel@tonic-gate * any improvements or extensions that they make and grant Carnegie Mellon 447c478bd9Sstevel@tonic-gate * the rights to redistribute these changes. 457c478bd9Sstevel@tonic-gate */ 467c478bd9Sstevel@tonic-gate/* 477c478bd9Sstevel@tonic-gate * C library -- _setjmp, _longjmp 487c478bd9Sstevel@tonic-gate * 497c478bd9Sstevel@tonic-gate * _longjmp(a,v) 507c478bd9Sstevel@tonic-gate * will generate a "return(v)" from 517c478bd9Sstevel@tonic-gate * the last call to 527c478bd9Sstevel@tonic-gate * _setjmp(a) 537c478bd9Sstevel@tonic-gate * by restoring registers from the stack, 547c478bd9Sstevel@tonic-gate * The previous signal state is NOT restored. 557c478bd9Sstevel@tonic-gate * 567c478bd9Sstevel@tonic-gate */ 577c478bd9Sstevel@tonic-gate 587c478bd9Sstevel@tonic-gateENTRY(grub_setjmp) 597c478bd9Sstevel@tonic-gate movl 4(%esp), %ecx /* fetch buffer */ 607c478bd9Sstevel@tonic-gate movl %ebx, 0(%ecx) 617c478bd9Sstevel@tonic-gate movl %esi, 4(%ecx) 627c478bd9Sstevel@tonic-gate movl %edi, 8(%ecx) 637c478bd9Sstevel@tonic-gate movl %ebp, 12(%ecx) /* save frame pointer of caller */ 647c478bd9Sstevel@tonic-gate popl %edx 657c478bd9Sstevel@tonic-gate movl %esp, 16(%ecx) /* save stack pointer of caller */ 667c478bd9Sstevel@tonic-gate movl %edx, 20(%ecx) /* save pc of caller */ 677c478bd9Sstevel@tonic-gate xorl %eax, %eax 687c478bd9Sstevel@tonic-gate jmp *%edx 697c478bd9Sstevel@tonic-gate 707c478bd9Sstevel@tonic-gateENTRY(grub_longjmp) 717c478bd9Sstevel@tonic-gate movl 8(%esp), %eax /* return(v) */ 727c478bd9Sstevel@tonic-gate movl 4(%esp), %ecx /* fetch buffer */ 737c478bd9Sstevel@tonic-gate movl 0(%ecx), %ebx 747c478bd9Sstevel@tonic-gate movl 4(%ecx), %esi 757c478bd9Sstevel@tonic-gate movl 8(%ecx), %edi 767c478bd9Sstevel@tonic-gate movl 12(%ecx), %ebp 777c478bd9Sstevel@tonic-gate movl 16(%ecx), %esp 787c478bd9Sstevel@tonic-gate orl %eax, %eax 797c478bd9Sstevel@tonic-gate jnz 0f 807c478bd9Sstevel@tonic-gate incl %eax 817c478bd9Sstevel@tonic-gate0: jmp *20(%ecx) /* done, return.... */ 82