setjmp.S revision 13545
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 1.3 1995/01/23 01:27:08 davidg Exp $ 37 */ 38 39#if defined(LIBC_RCS) && !defined(lint) 40 .text 41 .asciz "$Id: setjmp.S,v 1.3 1995/01/23 01:27:08 davidg 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 57#ifdef _THREAD_SAFE 58ENTRY(_thread_sys_setjmp) 59#else 60ENTRY(setjmp) 61#endif 62 pushl $0 63#ifdef _THREAD_SAFE 64 call PIC_PLT(__thread_sys_sigblock) 65#else 66 call PIC_PLT(_sigblock) 67#endif 68 popl %edx 69 movl 4(%esp),%ecx 70 movl 0(%esp),%edx 71 movl %edx, 0(%ecx) 72 movl %ebx, 4(%ecx) 73 movl %esp, 8(%ecx) 74 movl %ebp,12(%ecx) 75 movl %esi,16(%ecx) 76 movl %edi,20(%ecx) 77 movl %eax,24(%ecx) 78 fnstcw 28(%ecx) 79 xorl %eax,%eax 80 ret 81 82#ifdef _THREAD_SAFE 83ENTRY(_thread_sys_longjmp) 84#else 85ENTRY(longjmp) 86#endif 87 movl 4(%esp),%edx 88 pushl 24(%edx) 89#ifdef _THREAD_SAFE 90 call PIC_PLT(__thread_sys_sigsetmask) 91#else 92 call PIC_PLT(_sigsetmask) /* XXX this is not reentrant */ 93#endif 94 popl %eax 95 movl 4(%esp),%edx 96 movl 8(%esp),%eax 97 movl 0(%edx),%ecx 98 movl 4(%edx),%ebx 99 movl 8(%edx),%esp 100 movl 12(%edx),%ebp 101 movl 16(%edx),%esi 102 movl 20(%edx),%edi 103 fninit 104 fldcw 28(%edx) 105 testl %eax,%eax 106 jnz 1f 107 incl %eax 1081: movl %ecx,0(%esp) 109 ret 110