setjmp.S revision 35504
1/*- 2 * Copyright (c) 1990 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * William Jolitz. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * $Id: setjmp.S,v 1.7 1997/02/22 14:58:41 peter Exp $ 37 */ 38 39#if defined(LIBC_RCS) && !defined(lint) 40 .text 41 .asciz "$Id: setjmp.S,v 1.7 1997/02/22 14:58:41 peter Exp $" 42#endif /* LIBC_RCS and not lint */ 43 44/* 45 * C library -- _setjmp, _longjmp 46 * 47 * longjmp(a,v) 48 * will generate a "return(v)" from the last call to 49 * setjmp(a) 50 * by restoring registers from the environment 'a'. 51 * The previous signal state is restored. 52 */ 53 54#include "DEFS.h" 55#include "SYS.h" 56 57ENTRY(setjmp) 58 PIC_PROLOGUE 59 pushl $0 60#ifdef _THREAD_SAFE 61 call PIC_PLT(CNAME(_thread_sys_sigblock)) 62#else 63 call PIC_PLT(CNAME(sigblock)) 64#endif 65 popl %edx 66 PIC_EPILOGUE 67 movl 4(%esp),%ecx 68 movl 0(%esp),%edx 69 movl %edx, 0(%ecx) 70 movl %ebx, 4(%ecx) 71 movl %esp, 8(%ecx) 72 movl %ebp,12(%ecx) 73 movl %esi,16(%ecx) 74 movl %edi,20(%ecx) 75 movl %eax,24(%ecx) 76 fnstcw 28(%ecx) 77 xorl %eax,%eax 78 ret 79 80ENTRY(longjmp) 81 movl 4(%esp),%edx 82 PIC_PROLOGUE 83 pushl 24(%edx) 84#ifdef _THREAD_SAFE 85 call PIC_PLT(CNAME(_thread_sys_sigsetmask)) 86#else 87 call PIC_PLT(CNAME(sigsetmask)) /* XXX this is not reentrant */ 88#endif 89 popl %eax 90 PIC_EPILOGUE 91 movl 4(%esp),%edx 92 movl 8(%esp),%eax 93 movl 0(%edx),%ecx 94 movl 4(%edx),%ebx 95 movl 8(%edx),%esp 96 movl 12(%edx),%ebp 97 movl 16(%edx),%esi 98 movl 20(%edx),%edi 99 fninit 100 fldcw 28(%edx) 101 testl %eax,%eax 102 jnz 1f 103 incl %eax 1041: movl %ecx,0(%esp) 105 ret 106