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 1.10 1997/02/22 14:58:43 peter Exp $ 37 */ 38 39#if defined(LIBC_RCS) && !defined(lint) 40 .text 41 .asciz "$Id: sigsetjmp.S,v 1.10 1997/02/22 14:58:43 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 62ENTRY(sigsetjmp) 63 movl 8(%esp),%eax 64 movl 4(%esp),%ecx 65 movl %eax,32(%ecx) 66 testl %eax,%eax 67 jz 2f 68 PIC_PROLOGUE 69 pushl $0 70#ifdef _THREAD_SAFE 71 call PIC_PLT(CNAME(_thread_sys_sigblock)) 72#else 73 call PIC_PLT(CNAME(sigblock)) 74#endif 75 addl $4,%esp 76 PIC_EPILOGUE 77 movl 4(%esp),%ecx 78 movl %eax,24(%ecx) 792: movl 0(%esp),%edx 80 movl %edx, 0(%ecx) 81 movl %ebx, 4(%ecx) 82 movl %esp, 8(%ecx) 83 movl %ebp,12(%ecx) 84 movl %esi,16(%ecx) 85 movl %edi,20(%ecx) 86 fnstcw 28(%ecx) 87 xorl %eax,%eax 88 ret 89 90ENTRY(siglongjmp) 91 movl 4(%esp),%edx 92 cmpl $0,32(%edx) 93 jz 2f 94 PIC_PROLOGUE 95 pushl 24(%edx) 96#ifdef _THREAD_SAFE 97 call PIC_PLT(CNAME(_thread_sys_sigsetmask)) 98#else 99 call PIC_PLT(CNAME(sigsetmask)) 100#endif 101 addl $4,%esp 102 PIC_EPILOGUE 1032: movl 4(%esp),%edx 104 movl 8(%esp),%eax 105 movl 0(%edx),%ecx 106 movl 4(%edx),%ebx 107 movl 8(%edx),%esp 108 movl 12(%edx),%ebp 109 movl 16(%edx),%esi 110 movl 20(%edx),%edi 111 fninit 112 fldcw 28(%edx) 113 testl %eax,%eax 114 jnz 1f 115 incl %eax 1161: movl %ecx,0(%esp) 117 ret 118