1/* 2 * Copyright (c) 2000-2002 Apple Computer, Inc. All rights reserved. 3 * 4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ 5 * 6 * This file contains Original Code and/or Modifications of Original Code 7 * as defined in and that are subject to the Apple Public Source License 8 * Version 2.0 (the 'License'). You may not use this file except in 9 * compliance with the License. The rights granted to you under the License 10 * may not be used to create, or enable the creation or redistribution of, 11 * unlawful or unlicensed copies of an Apple operating system, or to 12 * circumvent, violate, or enable the circumvention or violation of, any 13 * terms of an Apple operating system software license agreement. 14 * 15 * Please obtain a copy of the License at 16 * http://www.opensource.apple.com/apsl/ and read it before using this file. 17 * 18 * The Original Code and all software distributed under the License are 19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 23 * Please see the License for the specific language governing rights and 24 * limitations under the License. 25 * 26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ 27 */ 28/* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */ 29/* 30 * Copyright (c) 1991, 1993 31 * The Regents of the University of California. All rights reserved. 32 * 33 * Redistribution and use in source and binary forms, with or without 34 * modification, are permitted provided that the following conditions 35 * are met: 36 * 1. Redistributions of source code must retain the above copyright 37 * notice, this list of conditions and the following disclaimer. 38 * 2. Redistributions in binary form must reproduce the above copyright 39 * notice, this list of conditions and the following disclaimer in the 40 * documentation and/or other materials provided with the distribution. 41 * 3. All advertising materials mentioning features or use of this software 42 * must display the following acknowledgement: 43 * This product includes software developed by the University of 44 * California, Berkeley and its contributors. 45 * 4. Neither the name of the University nor the names of its contributors 46 * may be used to endorse or promote products derived from this software 47 * without specific prior written permission. 48 * 49 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 50 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 51 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 52 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 53 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 54 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 55 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 56 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 57 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 58 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 59 * SUCH DAMAGE. 60 * 61 * @(#)signalvar.h 8.3 (Berkeley) 1/4/94 62 */ 63 64#ifndef _SYS_SIGNALVAR_H_ /* tmp for user.h */ 65#define _SYS_SIGNALVAR_H_ 66 67#include <sys/appleapiopts.h> 68 69#ifdef BSD_KERNEL_PRIVATE 70/* 71 * Kernel signal definitions and data structures, 72 * not exported to user programs. 73 */ 74 75/* 76 * Process signal actions and state, needed only within the process 77 * (not necessarily resident). 78 */ 79struct sigacts { 80 user_addr_t ps_sigact[NSIG]; /* disposition of signals */ 81 user_addr_t ps_trampact[NSIG]; /* disposition of signals */ 82 sigset_t ps_catchmask[NSIG]; /* signals to be blocked */ 83 sigset_t ps_sigonstack; /* signals to take on sigstack */ 84 sigset_t ps_sigintr; /* signals that interrupt syscalls */ 85 sigset_t ps_sigreset; /* signals that reset when caught */ 86 sigset_t ps_signodefer; /* signals not masked while handled */ 87 sigset_t ps_siginfo; /* signals that want SA_SIGINFO args */ 88 sigset_t ps_oldmask; /* saved mask from before sigpause */ 89 int ps_flags; /* signal flags, below */ 90 struct kern_sigaltstack ps_sigstk; /* sp, length & flags */ 91 int ps_sig; /* for core dump/debugger XXX */ 92 int ps_code; /* for core dump/debugger XXX */ 93 int ps_addr; /* for core dump/debugger XXX */ 94 sigset_t ps_usertramp; /* SunOS compat; libc sigtramp XXX */ 95 sigset_t ps_64regset; /* signals that want SA_EXSIGINFO args */ 96}; 97 98/* signal flags */ 99#define SAS_OLDMASK 0x01 /* need to restore mask before pause */ 100#define SAS_ALTSTACK 0x02 /* have alternate signal stack */ 101 102/* 103 * Additional signal action values, used only temporarily/internally; these 104 * values should be non-intersecting with values defined in signal.h, e.g.: 105 * SIG_IGN, SIG_DFL, SIG_ERR, SIG_IGN. 106 */ 107#define KERN_SIG_CATCH CAST_USER_ADDR_T(2) 108#define KERN_SIG_HOLD CAST_USER_ADDR_T(3) 109#define KERN_SIG_WAIT CAST_USER_ADDR_T(4) 110 111/* 112 * get signal action for process and signal; currently only for current process 113 */ 114#define SIGACTION(p, sig) (p->p_sigacts->ps_sigact[(sig)]) 115 116/* 117 * Check for per-process and per thread signals. 118 */ 119#define SHOULDissignal(p,uthreadp) \ 120 (((uthreadp)->uu_siglist) \ 121 & ~((((uthreadp)->uu_sigmask) \ 122 | (((p)->p_lflag & P_LTRACED) ? 0 : (p)->p_sigignore)) \ 123 & ~sigcantmask)) 124 125/* 126 * Check for signals and per-thread signals. 127 * Use in trap() and syscall() before 128 * exiting kernel. 129 */ 130#define CHECK_SIGNALS(p, thread, uthreadp) \ 131 (!thread_should_halt(thread) \ 132 && (SHOULDissignal(p,uthreadp))) 133 134/* 135 * Signal properties and actions. 136 * The array below categorizes the signals and their default actions 137 * according to the following properties: 138 */ 139#define SA_KILL 0x01 /* terminates process by default */ 140#define SA_CORE 0x02 /* ditto and coredumps */ 141#define SA_STOP 0x04 /* suspend process */ 142#define SA_TTYSTOP 0x08 /* ditto, from tty */ 143#define SA_IGNORE 0x10 /* ignore by default */ 144#define SA_CONT 0x20 /* continue if suspended */ 145#define SA_CANTMASK 0x40 /* non-maskable, catchable */ 146 147#ifdef SIGPROP 148int sigprop[NSIG + 1] = { 149 0, /* unused */ 150 SA_KILL, /* SIGHUP */ 151 SA_KILL, /* SIGINT */ 152 SA_KILL|SA_CORE, /* SIGQUIT */ 153 SA_KILL|SA_CORE, /* SIGILL */ 154 SA_KILL|SA_CORE, /* SIGTRAP */ 155 SA_KILL|SA_CORE, /* SIGABRT */ 156 SA_KILL|SA_CORE, /* SIGEMT */ 157 SA_KILL|SA_CORE, /* SIGFPE */ 158 SA_KILL, /* SIGKILL */ 159 SA_KILL|SA_CORE, /* SIGBUS */ 160 SA_KILL|SA_CORE, /* SIGSEGV */ 161 SA_KILL|SA_CORE, /* SIGSYS */ 162 SA_KILL, /* SIGPIPE */ 163 SA_KILL, /* SIGALRM */ 164 SA_KILL, /* SIGTERM */ 165 SA_IGNORE, /* SIGURG */ 166 SA_STOP, /* SIGSTOP */ 167 SA_STOP|SA_TTYSTOP, /* SIGTSTP */ 168 SA_IGNORE|SA_CONT, /* SIGCONT */ 169 SA_IGNORE, /* SIGCHLD */ 170 SA_STOP|SA_TTYSTOP, /* SIGTTIN */ 171 SA_STOP|SA_TTYSTOP, /* SIGTTOU */ 172 SA_IGNORE, /* SIGIO */ 173 SA_KILL, /* SIGXCPU */ 174 SA_KILL, /* SIGXFSZ */ 175 SA_KILL, /* SIGVTALRM */ 176 SA_KILL, /* SIGPROF */ 177 SA_IGNORE, /* SIGWINCH */ 178 SA_IGNORE, /* SIGINFO */ 179 SA_KILL, /* SIGUSR1 */ 180 SA_KILL, /* SIGUSR2 */ 181}; 182 183#define contsigmask (sigmask(SIGCONT)) 184#define stopsigmask (sigmask(SIGSTOP) | sigmask(SIGTSTP) | \ 185 sigmask(SIGTTIN) | sigmask(SIGTTOU)) 186 187#endif /* SIGPROP */ 188 189#define sigcantmask (sigmask(SIGKILL) | sigmask(SIGSTOP)) 190 191/* 192 * Machine-independent functions: 193 */ 194int coredump(struct proc *p, uint32_t reserve_mb, int ignore_ulimit); 195void execsigs(struct proc *p, thread_t thread); 196void gsignal(int pgid, int sig); 197int issignal_locked(struct proc *p); 198int CURSIG(struct proc *p); 199int clear_procsiglist(struct proc *p, int bit, int in_signalstart); 200int set_procsigmask(struct proc *p, int bit); 201void postsig_locked(int sig); 202void siginit(struct proc *p); 203void trapsignal(struct proc *p, int sig, unsigned code); 204void pt_setrunnable(struct proc *p); 205int hassigprop(int sig, int prop); 206 207/* 208 * Machine-dependent functions: 209 */ 210void sendsig(struct proc *, /*sig_t*/ user_addr_t action, int sig, 211 int returnmask, uint32_t code); 212 213void psignal(struct proc *p, int sig); 214void psignal_locked(struct proc *, int); 215void pgsignal(struct pgrp *pgrp, int sig, int checkctty); 216void tty_pgsignal(struct tty * tp, int sig, int checkctty); 217void threadsignal(thread_t sig_actthread, int signum, 218 mach_exception_code_t code); 219int thread_issignal(proc_t p, thread_t th, sigset_t mask); 220void psignal_vfork(struct proc *p, task_t new_task, thread_t thread, 221 int signum); 222void psignal_vtalarm(struct proc *); 223void psignal_xcpu(struct proc *); 224void psignal_sigprof(struct proc *); 225void signal_setast(thread_t sig_actthread); 226void pgsigio(pid_t pgid, int signalnum); 227 228void sig_lock_to_exit(struct proc *p); 229int sig_try_locked(struct proc *p); 230 231#endif /* BSD_KERNEL_PRIVATE */ 232 233#endif /* !_SYS_SIGNALVAR_H_ */ 234