1/* $NetBSD: setjmp.S,v 1.9 1997/07/16 14:37:19 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. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * from: @(#)setjmp.s 5.1 (Berkeley) 4/23/90 39 */ 40 41#include <machine/asm.h> 42#if defined(LIBC_SCCS) 43 RCSID("$NetBSD: setjmp.S,v 1.9 1997/07/16 14:37:19 christos Exp $") 44#endif 45 46/* 47 * C library -- _setjmp, _longjmp 48 * 49 * longjmp(a,v) 50 * will generate a "return(v)" from the last call to 51 * setjmp(a) 52 * by restoring registers from the stack. 53 * The previous signal state is restored. 54 */ 55 56ENTRY(setjmp) 57 pushl $0 58#ifdef PIC 59 call PIC_PLT(_sigblock) 60#else 61 call _sigblock 62#endif 63 addl $4,%esp 64 movl 4(%esp),%ecx 65 movl 0(%esp),%edx 66 movl %edx, 0(%ecx) 67 movl %ebx, 4(%ecx) 68 movl %esp, 8(%ecx) 69 movl %ebp,12(%ecx) 70 movl %esi,16(%ecx) 71 movl %edi,20(%ecx) 72 movl %eax,24(%ecx) 73 xorl %eax,%eax 74 ret 75 76ENTRY(longjmp) 77 movl 4(%esp),%edx 78 pushl 24(%edx) 79#ifdef PIC 80 call PIC_PLT(_sigsetmask) 81#else 82 call _sigsetmask 83#endif 84 addl $4,%esp 85 movl 4(%esp),%edx 86 movl 8(%esp),%eax 87 movl 0(%edx),%ecx 88 movl 4(%edx),%ebx 89 movl 8(%edx),%esp 90 movl 12(%edx),%ebp 91 movl 16(%edx),%esi 92 movl 20(%edx),%edi 93 testl %eax,%eax 94 jnz 1f 95 incl %eax 961: movl %ecx,0(%esp) 97 ret 98