1/* $OpenBSD: _setjmp.S,v 1.5 2005/08/07 11:30:38 espie Exp $ */ 2/*- 3 * Copyright (c) 1990 The Regents of the University of California. 4 * All rights reserved. 5 * 6 * This code is derived from software contributed to Berkeley by 7 * William Jolitz. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34#include <machine/asm.h> 35 36/* 37 * C library -- _setjmp, _longjmp 38 * 39 * _longjmp(a,v) 40 * will generate a "return(v)" from the last call to 41 * _setjmp(a) 42 * by restoring registers from the stack. 43 * The previous signal state is NOT restored. 44 */ 45 46ENTRY(_setjmp) 47 movl 4(%esp),%eax 48 movl 0(%esp),%edx 49 movl %edx, 0(%eax) /* rta */ 50 movl %ebx, 4(%eax) 51 movl %esp, 8(%eax) 52 movl %ebp,12(%eax) 53 movl %esi,16(%eax) 54 movl %edi,20(%eax) 55 xorl %eax,%eax 56 ret 57 58ENTRY(_longjmp) 59 movl 4(%esp),%edx 60 movl 8(%esp),%eax 61 movl 0(%edx),%ecx 62 movl 4(%edx),%ebx 63 movl 8(%edx),%esp 64 movl 12(%edx),%ebp 65 movl 16(%edx),%esi 66 movl 20(%edx),%edi 67 testl %eax,%eax 68 jnz 1f 69 incl %eax 701: movl %ecx,0(%esp) 71 ret 72