setjmp.S revision 55375
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 * $FreeBSD: head/lib/libc/i386/gen/setjmp.S 55375 2000-01-04 00:02:21Z jasone $ 37 */ 38 39#if defined(LIBC_RCS) && !defined(lint) 40 .text 41 .asciz "$FreeBSD: head/lib/libc/i386/gen/setjmp.S 55375 2000-01-04 00:02:21Z jasone $" 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.globl CNAME(__setjmp); CNAME(__setjmp): 58ENTRY(setjmp) 59 movl 4(%esp),%ecx 60 PIC_PROLOGUE 61 leal 28(%ecx), %eax 62 pushl %eax /* (sigset_t*)oset */ 63 pushl $0 /* (sigset_t*)set */ 64 pushl $1 /* SIG_BLOCK */ 65#ifdef _THREAD_SAFE 66 call PIC_PLT(CNAME(_thread_sys_sigprocmask)) 67#else 68 call PIC_PLT(CNAME(sigprocmask)) 69#endif 70 addl $12,%esp 71 PIC_EPILOGUE 72 movl 4(%esp),%ecx 73 movl 0(%esp),%edx 74 movl %edx, 0(%ecx) 75 movl %ebx, 4(%ecx) 76 movl %esp, 8(%ecx) 77 movl %ebp,12(%ecx) 78 movl %esi,16(%ecx) 79 movl %edi,20(%ecx) 80 fnstcw 24(%ecx) 81 xorl %eax,%eax 82 ret 83 84.globl CNAME(__longjmp); CNAME(__longjmp): 85ENTRY(longjmp) 86 movl 4(%esp),%edx 87 PIC_PROLOGUE 88 pushl $0 /* (sigset_t*)oset */ 89 leal 28(%edx), %eax 90 pushl %eax /* (sigset_t*)set */ 91 pushl $3 /* SIG_SETMASK */ 92#ifdef _THREAD_SAFE 93 call PIC_PLT(CNAME(_thread_sys_sigprocmask)) 94#else 95 call PIC_PLT(CNAME(sigprocmask)) 96#endif 97 addl $12,%esp 98 PIC_EPILOGUE 99 movl 4(%esp),%edx 100 movl 8(%esp),%eax 101 movl 0(%edx),%ecx 102 movl 4(%edx),%ebx 103 movl 8(%edx),%esp 104 movl 12(%edx),%ebp 105 movl 16(%edx),%esi 106 movl 20(%edx),%edi 107 fninit 108 fldcw 24(%edx) 109 testl %eax,%eax 110 jnz 1f 111 incl %eax 1121: movl %ecx,0(%esp) 113 ret 114