1/* $OpenBSD: setjmp.S,v 1.8 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 restored. 44 */ 45 46ENTRY(setjmp) 47 PIC_PROLOGUE 48 pushl $0 49#ifdef PIC 50 call PIC_PLT(_C_LABEL(sigblock)) 51#else 52 call _C_LABEL(sigblock) 53#endif 54 addl $4,%esp 55 PIC_EPILOGUE 56 57 movl 4(%esp),%ecx 58 movl 0(%esp),%edx 59 movl %edx, 0(%ecx) 60 movl %ebx, 4(%ecx) 61 movl %esp, 8(%ecx) 62 movl %ebp,12(%ecx) 63 movl %esi,16(%ecx) 64 movl %edi,20(%ecx) 65 movl %eax,24(%ecx) 66 xorl %eax,%eax 67 ret 68 69ENTRY(longjmp) 70 movl 4(%esp),%edx 71 PIC_PROLOGUE 72 pushl 24(%edx) 73#ifdef PIC 74 call PIC_PLT(_C_LABEL(sigsetmask)) 75#else 76 call _C_LABEL(sigsetmask) 77#endif 78 addl $4,%esp 79 PIC_EPILOGUE 80 81 movl 4(%esp),%edx 82 movl 8(%esp),%eax 83 movl 0(%edx),%ecx 84 movl 4(%edx),%ebx 85 movl 8(%edx),%esp 86 movl 12(%edx),%ebp 87 movl 16(%edx),%esi 88 movl 20(%edx),%edi 89 testl %eax,%eax 90 jnz 1f 91 incl %eax 921: movl %ecx,0(%esp) 93 ret 94