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 * $FreeBSD$ 37 */ 38 39#if defined(LIBC_RCS) && !defined(lint) 40 .text 41 .asciz "$FreeBSD$" 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.weak sigsetjmp; 64.set sigsetjmp, __sigsetjmp; 65 movl 8(%esp),%eax 66 movl 4(%esp),%ecx 67 movl %eax,44(%ecx) 68 testl %eax,%eax 69 jz 2f 70 PIC_PROLOGUE 71 leal 28(%ecx), %eax 72 pushl %eax /* (sigset_t*)oset */ 73 pushl $0 /* (sigset_t*)set */ 74 pushl $1 /* SIG_BLOCK */ 75#ifdef _THREAD_SAFE 76 call PIC_PLT(CNAME(_thread_sys_sigprocmask)) 77#else 78 call PIC_PLT(CNAME(sigprocmask)) 79#endif 80 addl $12,%esp 81 PIC_EPILOGUE 82 movl 4(%esp),%ecx 832: 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 24(%ecx) 91 xorl %eax,%eax 92 ret 93 94ENTRY(__siglongjmp) 95.weak siglongjmp; 96.set siglongjmp, __siglongjmp; 97 movl 4(%esp),%edx 98 cmpl $0,44(%edx) 99 jz 2f 100 PIC_PROLOGUE 101 pushl $0 /* (sigset_t*)oset */ 102 leal 28(%edx), %eax 103 pushl %eax /* (sigset_t*)set */ 104 pushl $3 /* SIG_SETMASK */ 105#ifdef _THREAD_SAFE 106 call PIC_PLT(CNAME(_thread_sys_sigprocmask)) 107#else 108 call PIC_PLT(CNAME(sigprocmask)) 109#endif 110 addl $12,%esp 111 PIC_EPILOGUE 112 movl 4(%esp),%edx 1132: movl 8(%esp),%eax 114 movl 0(%edx),%ecx 115 movl 4(%edx),%ebx 116 movl 8(%edx),%esp 117 movl 12(%edx),%ebp 118 movl 16(%edx),%esi 119 movl 20(%edx),%edi 120 fninit 121 fldcw 24(%edx) 122 testl %eax,%eax 123 jnz 1f 124 incl %eax 1251: movl %ecx,0(%esp) 126 ret 127