sigsetjmp.S revision 15634
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: sigsetjmp.S,v 1.6 1996/02/17 12:25:21 peter Exp $ 37 */ 38 39#if defined(LIBC_RCS) && !defined(lint) 40 .text 41 .asciz "$Id: sigsetjmp.S,v 1.6 1996/02/17 12:25:21 peter Exp $" 42#endif /* LIBC_RCS and not lint */ 43 44#include "DEFS.h" 45#include "SYS.h" 46 47/*- 48 * TODO: 49 * Rename sigsetjmp to __sigsetjmp and siglongjmp to __siglongjmp, 50 * remove the other *jmp functions and define everything in terms 51 * of the renamed functions. This requires compiler support for 52 * the renamed functions (introduced in gcc-2.5.3; previous versions 53 * only supported *jmp with 0 or 1 leading underscores). 54 * 55 * Use sigprocmask() instead of sigblock() and sigsetmask(), and 56 * check for and handle errors. 57 * 58 * Restore _all_ the registers and the signal mask atomically. Can 59 * use sigreturn() if sigreturn() works. 60 */ 61 62#ifdef _THREAD_SAFE 63ENTRY(_thread_sys_sigsetjmp) 64#else 65ENTRY(sigsetjmp) 66#endif 67 movl 8(%esp),%eax 68 movl 4(%esp),%ecx 69 movl %eax,32(%ecx) 70 testl %eax,%eax 71 jz 1f 72 PIC_PROLOGUE 73 pushl $0 74#ifdef _THREAD_SAFE 75 call PIC_PLT(CNAME(_thread_sys_sigblock)) 76#else 77 call PIC_PLT(CNAME(sigblock)) 78#endif 79 addl $4,%esp 80 PIC_EPILOGUE 81 movl 4(%esp),%ecx 82 movl %eax,24(%ecx) 831: movl 0(%esp),%edx 84 movl %edx, 0(%ecx) 85 movl %ebx, 4(%ecx) 86 movl %esp, 8(%ecx) 87 movl %ebp,12(%ecx) 88 movl %esi,16(%ecx) 89 movl %edi,20(%ecx) 90 fnstcw 28(%ecx) 91 xorl %eax,%eax 92 ret 93 94#ifdef _THREAD_SAFE 95ENTRY(_thread_sys_siglongjmp) 96#else 97ENTRY(siglongjmp) 98#endif 99 movl 4(%esp),%edx 100 cmpl $0,32(%edx) 101 jz 1f 102 PIC_PROLOGUE 103 pushl 24(%edx) 104#ifdef _THREAD_SAFE 105 call PIC_PLT(CNAME(_thread_sys_sigsetmask)) 106#else 107 call PIC_PLT(CNAME(sigsetmask)) 108#endif 109 addl $4,%esp 110 PIC_EPILOGUE 1111: movl 4(%esp),%edx 112 movl 8(%esp),%eax 113 movl 0(%edx),%ecx 114 movl 4(%edx),%ebx 115 movl 8(%edx),%esp 116 movl 12(%edx),%ebp 117 movl 16(%edx),%esi 118 movl 20(%edx),%edi 119 fninit 120 fldcw 28(%edx) 121 testl %eax,%eax 122 jnz 2f 123 incl %eax 1242: movl %ecx,0(%esp) 125 ret 126