1/* $NetBSD: _setjmp.S,v 1.8 2005/10/05 20:18:12 christos Exp $ */ 2 3/*- 4 * Copyright (c) 1990 The Regents of the University of California. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * William Jolitz. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * from: @(#)_setjmp.s 5.1 (Berkeley) 4/23/90 35 */ 36 37#include <machine/asm.h> 38#if defined(LIBC_SCCS) 39 RCSID("$NetBSD: _setjmp.S,v 1.8 2005/10/05 20:18:12 christos Exp $") 40#endif 41 42/* 43 * C library -- _setjmp, _longjmp 44 * 45 * _longjmp(a,v) 46 * will generate a "return(v)" from the last call to 47 * _setjmp(a) 48 * by restoring registers from the stack. 49 * The previous signal state is NOT restored. 50 */ 51 52ENTRY(_setjmp) 53 movl 4(%esp),%eax 54 movl 0(%esp),%edx 55 movl %edx, 0(%eax) /* rta */ 56 movl %ebx, 4(%eax) 57 movl %esp, 8(%eax) 58 movl %ebp,12(%eax) 59 movl %esi,16(%eax) 60 movl %edi,20(%eax) 61 xorl %eax,%eax 62 ret 63 64ENTRY(_longjmp) 65 movl 4(%esp),%edx 66 movl 8(%esp),%eax 67 movl 0(%edx),%ecx 68 movl 4(%edx),%ebx 69 movl 8(%edx),%esp 70 movl 12(%edx),%ebp 71 movl 16(%edx),%esi 72 movl 20(%edx),%edi 73 testl %eax,%eax 74 jnz 1f 75 incl %eax 761: movl %ecx,0(%esp) 77 ret 78