signal.h revision 1.19
1/* $NetBSD: signal.h,v 1.19 2003/09/10 16:48:16 christos Exp $ */ 2 3/* 4 * Copyright (c) 1982, 1986, 1989, 1991 Regents of the University of California. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * @(#)signal.h 7.16 (Berkeley) 3/17/91 32 */ 33 34#ifndef _I386_SIGNAL_H_ 35#define _I386_SIGNAL_H_ 36 37#include <sys/featuretest.h> 38 39typedef int sig_atomic_t; 40 41#define __HAVE_SIGINFO 42 43#if defined(_NETBSD_SOURCE) 44/* 45 * Get the "code" values 46 */ 47#include <machine/trap.h> 48 49/* 50 * Information pushed on stack when a signal is delivered. 51 * This is used by the kernel to restore state following 52 * execution of the signal handler. It is also made available 53 * to the handler to allow it to restore state properly if 54 * a non-standard exit is performed. 55 */ 56#if defined(__LIBC12_SOURCE__) || defined(_KERNEL) 57struct sigcontext13 { 58 int sc_gs; 59 int sc_fs; 60 int sc_es; 61 int sc_ds; 62 int sc_edi; 63 int sc_esi; 64 int sc_ebp; 65 int sc_ebx; 66 int sc_edx; 67 int sc_ecx; 68 int sc_eax; 69 /* XXX */ 70 int sc_eip; 71 int sc_cs; 72 int sc_eflags; 73 int sc_esp; 74 int sc_ss; 75 76 int sc_onstack; /* sigstack state to restore */ 77 int sc_mask; /* signal mask to restore (old style) */ 78 79 int sc_trapno; /* XXX should be above */ 80 int sc_err; 81}; 82#endif 83 84#if defined(COMPAT_16) || defined(_KERNEL) 85/* 86 * We limit this to kernel use only, so that legacy code will break. 87 * XXX: We need to fix vm86 syscall, not to use sigcontext but __gregset_t 88 * + sigset_t, but that is an API change. 89 */ 90struct sigcontext { 91 int sc_gs; 92 int sc_fs; 93 int sc_es; 94 int sc_ds; 95 int sc_edi; 96 int sc_esi; 97 int sc_ebp; 98 int sc_ebx; 99 int sc_edx; 100 int sc_ecx; 101 int sc_eax; 102 /* XXX */ 103 int sc_eip; 104 int sc_cs; 105 int sc_eflags; 106 int sc_esp; 107 int sc_ss; 108 109 int sc_onstack; /* sigstack state to restore */ 110 int __sc_mask13; /* signal mask to restore (old style) */ 111 112 int sc_trapno; /* XXX should be above */ 113 int sc_err; 114 115 sigset_t sc_mask; /* signal mask to restore (new style) */ 116}; 117 118/* 119 * The following macros are used to convert from a ucontext to sigcontext, 120 * and vice-versa. This is for building a sigcontext to deliver to old-style 121 * signal handlers, and converting back (in the event the handler modifies 122 * the context). 123 */ 124#define _MCONTEXT_TO_SIGCONTEXT(uc, sc) \ 125do { \ 126 (sc)->sc_gs = (uc)->uc_mcontext.__gregs[_REG_GS]; \ 127 (sc)->sc_fs = (uc)->uc_mcontext.__gregs[_REG_FS]; \ 128 (sc)->sc_es = (uc)->uc_mcontext.__gregs[_REG_ES]; \ 129 (sc)->sc_ds = (uc)->uc_mcontext.__gregs[_REG_DS]; \ 130 (sc)->sc_edi = (uc)->uc_mcontext.__gregs[_REG_EDI]; \ 131 (sc)->sc_esi = (uc)->uc_mcontext.__gregs[_REG_ESI]; \ 132 (sc)->sc_ebp = (uc)->uc_mcontext.__gregs[_REG_EBP]; \ 133 (sc)->sc_ebx = (uc)->uc_mcontext.__gregs[_REG_EBX]; \ 134 (sc)->sc_edx = (uc)->uc_mcontext.__gregs[_REG_EDX]; \ 135 (sc)->sc_ecx = (uc)->uc_mcontext.__gregs[_REG_ECX]; \ 136 (sc)->sc_eax = (uc)->uc_mcontext.__gregs[_REG_EAX]; \ 137 (sc)->sc_eip = (uc)->uc_mcontext.__gregs[_REG_EIP]; \ 138 (sc)->sc_cs = (uc)->uc_mcontext.__gregs[_REG_CS]; \ 139 (sc)->sc_eflags = (uc)->uc_mcontext.__gregs[_REG_EFL]; \ 140 (sc)->sc_esp = (uc)->uc_mcontext.__gregs[_REG_UESP]; \ 141 (sc)->sc_ss = (uc)->uc_mcontext.__gregs[_REG_SS]; \ 142 (sc)->sc_trapno = (uc)->uc_mcontext.__gregs[_REG_TRAPNO]; \ 143 (sc)->sc_err = (uc)->uc_mcontext.__gregs[_REG_ERR]; \ 144} while (/*CONSTCOND*/0) 145 146#define _SIGCONTEXT_TO_MCONTEXT(sc, uc) \ 147do { \ 148 (uc)->uc_mcontext.__gregs[_REG_GS] = (sc)->sc_gs; \ 149 (uc)->uc_mcontext.__gregs[_REG_FS] = (sc)->sc_fs; \ 150 (uc)->uc_mcontext.__gregs[_REG_ES] = (sc)->sc_es; \ 151 (uc)->uc_mcontext.__gregs[_REG_DS] = (sc)->sc_ds; \ 152 (uc)->uc_mcontext.__gregs[_REG_EDI] = (sc)->sc_edi; \ 153 (uc)->uc_mcontext.__gregs[_REG_ESI] = (sc)->sc_esi; \ 154 (uc)->uc_mcontext.__gregs[_REG_EBP] = (sc)->sc_ebp; \ 155 (uc)->uc_mcontext.__gregs[_REG_EBX] = (sc)->sc_ebx; \ 156 (uc)->uc_mcontext.__gregs[_REG_EDX] = (sc)->sc_edx; \ 157 (uc)->uc_mcontext.__gregs[_REG_ECX] = (sc)->sc_ecx; \ 158 (uc)->uc_mcontext.__gregs[_REG_EAX] = (sc)->sc_eax; \ 159 (uc)->uc_mcontext.__gregs[_REG_EIP] = (sc)->sc_eip; \ 160 (uc)->uc_mcontext.__gregs[_REG_CS] = (sc)->sc_cs; \ 161 (uc)->uc_mcontext.__gregs[_REG_EFL] = (sc)->sc_eflags; \ 162 (uc)->uc_mcontext.__gregs[_REG_UESP] = (sc)->sc_esp; \ 163 (uc)->uc_mcontext.__gregs[_REG_UESP] = (sc)->sc_esp; \ 164 (uc)->uc_mcontext.__gregs[_REG_SS] = (sc)->sc_ss; \ 165 (uc)->uc_mcontext.__gregs[_REG_TRAPNO] = (sc)->sc_trapno; \ 166 (uc)->uc_mcontext.__gregs[_REG_ERR] = (sc)->sc_err; \ 167} while (/*CONSTCOND*/0) 168#endif 169 170#define sc_sp sc_esp 171#define sc_fp sc_ebp 172#define sc_pc sc_eip 173#define sc_ps sc_eflags 174 175#endif /* _NETBSD_SOURCE */ 176#endif /* !_I386_SIGNAL_H_ */ 177