1 /* 2 * Copyright (c) 1991, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#)signalvar.h 8.6 (Berkeley) 2/19/95 30 * $FreeBSD: src/sys/sys/signalvar.h,v 1.34.2.1 2000/05/16 06:58:05 dillon Exp $ 31 */ 32 33 #ifndef _SYS_SIGNALVAR_H_ /* tmp for user.h */ 34 #define _SYS_SIGNALVAR_H_ 35 36 /* 37 * Don't bring in the entire bleeding include set if we aren't the kernel. 38 * Userland is not allowed to bring in sys/proc.h except under special 39 * circumstances (e.g. sys/user.h) 40 */ 41 #include <sys/signal.h> 42 #ifdef _KERNEL 43 #include <sys/proc.h> 44 #include <machine/lock.h> 45 #endif 46 47 /* 48 * Kernel signal definitions and data structures, 49 * not exported to user programs. 50 */ 51 52 /* 53 * Process signal actions and state, needed only within the process 54 * (not necessarily resident). 55 */ 56 struct sigacts { 57 sig_t ps_sigact[_SIG_MAXSIG]; /* disposition of signals */ 58 sigset_t ps_catchmask[_SIG_MAXSIG]; /* signals to be blocked */ 59 struct { 60 int pid; 61 int uid; 62 } ps_frominfo[_SIG_MAXSIG]; 63 sigset_t ps_sigignore; /* Signals being ignored. */ 64 sigset_t ps_sigcatch; /* Signals being caught by user. */ 65 sigset_t ps_sigonstack; /* signals to take on sigstack */ 66 sigset_t ps_sigintr; /* signals that interrupt syscalls */ 67 sigset_t ps_sigreset; /* signals that reset when caught */ 68 sigset_t ps_signodefer; /* signals not masked while handled */ 69 sigset_t ps_siginfo; /* signals that want SA_SIGINFO args */ 70 sigset_t ps_usertramp; /* SunOS compat; libc sigtramp XXX */ 71 unsigned int ps_refcnt; 72 int ps_flag; 73 }; 74 75 /* additional signal action values, used only temporarily/internally */ 76 #define SIG_CATCH ((__sighandler_t *)2) 77 #define SIG_HOLD ((__sighandler_t *)3) 78 79 #ifdef _KERNEL 80 81 /* 82 * get signal action for process and signal; currently only for current process 83 */ 84 #define SIGACTION(p, sig) (p->p_sigacts->ps_sigact[_SIG_IDX(sig)]) 85 86 #endif 87 88 /* 89 * sigset_t manipulation macros 90 */ 91 #define SIGADDSET(set, signo) \ 92 (set).__bits[_SIG_WORD(signo)] |= _SIG_BIT(signo) 93 94 #define SIGADDSET_ATOMIC(set, signo) \ 95 atomic_set_int(&(set).__bits[_SIG_WORD(signo)], _SIG_BIT(signo)) 96 97 #define SIGDELSET(set, signo) \ 98 (set).__bits[_SIG_WORD(signo)] &= ~_SIG_BIT(signo) 99 100 #define SIGDELSET_ATOMIC(set, signo) \ 101 atomic_clear_int(&(set).__bits[_SIG_WORD(signo)], _SIG_BIT(signo)) 102 103 #define SIGEMPTYSET(set) \ 104 do { \ 105 int __i; \ 106 for (__i = 0; __i < _SIG_WORDS; __i++) \ 107 (set).__bits[__i] = 0; \ 108 } while (0) 109 110 #define SIGFILLSET(set) \ 111 do { \ 112 int __i; \ 113 for (__i = 0; __i < _SIG_WORDS; __i++) \ 114 (set).__bits[__i] = ~(unsigned int)0; \ 115 } while (0) 116 117 #define SIGISMEMBER(set, signo) \ 118 ((set).__bits[_SIG_WORD(signo)] & _SIG_BIT(signo)) 119 120 #define SIGISEMPTY(set) __sigisempty(&(set)) 121 #define SIGNOTEMPTY(set) (!__sigisempty(&(set))) 122 123 #define SIGSETEQ(set1, set2) __sigseteq(&(set1), &(set2)) 124 #define SIGSETNEQ(set1, set2) (!__sigseteq(&(set1), &(set2))) 125 126 #define SIGSETOR(set1, set2) \ 127 do { \ 128 int __i; \ 129 for (__i = 0; __i < _SIG_WORDS; __i++) \ 130 (set1).__bits[__i] |= (set2).__bits[__i]; \ 131 } while (0) 132 133 #define SIGSETAND(set1, set2) \ 134 do { \ 135 int __i; \ 136 for (__i = 0; __i < _SIG_WORDS; __i++) \ 137 (set1).__bits[__i] &= (set2).__bits[__i]; \ 138 } while (0) 139 140 #define SIGSETNAND(set1, set2) \ 141 do { \ 142 int __i; \ 143 for (__i = 0; __i < _SIG_WORDS; __i++) \ 144 (set1).__bits[__i] &= ~(set2).__bits[__i]; \ 145 } while (0) 146 147 #define SIGSETOR_CANTMASK(set) \ 148 SIGADDSET(set, SIGKILL), SIGADDSET(set, SIGSTOP) 149 150 #define SIG_CONDBLOCKALLSIGS(set, lp) \ 151 __sig_condblockallsigs(&(set), lp) 152 153 #define SIG_CANTMASK(set) \ 154 SIGDELSET(set, SIGKILL), SIGDELSET(set, SIGSTOP) 155 156 #define SIG_STOPSIGMASK(set) \ 157 SIGDELSET(set, SIGSTOP), SIGDELSET(set, SIGTSTP), \ 158 SIGDELSET(set, SIGTTIN), SIGDELSET(set, SIGTTOU) 159 160 #define SIG_STOPSIGMASK_ATOMIC(set) \ 161 SIGDELSET_ATOMIC(set, SIGSTOP), SIGDELSET_ATOMIC(set, SIGTSTP), \ 162 SIGDELSET_ATOMIC(set, SIGTTIN), SIGDELSET_ATOMIC(set, SIGTTOU) 163 164 #define SIG_CONTSIGMASK(set) \ 165 SIGDELSET(set, SIGCONT) 166 167 #define SIG_CONTSIGMASK_ATOMIC(set) \ 168 SIGDELSET_ATOMIC(set, SIGCONT) 169 170 #define sigcantmask (sigmask(SIGKILL) | sigmask(SIGSTOP)) 171 172 static __inline int 173 __sigisempty(sigset_t *set) 174 { 175 int i; 176 177 for (i = 0; i < _SIG_WORDS; i++) { 178 if (set->__bits[i]) 179 return (0); 180 } 181 return (1); 182 } 183 184 static __inline int 185 __sigseteq(sigset_t *set1, sigset_t *set2) 186 { 187 int i; 188 189 for (i = 0; i < _SIG_WORDS; i++) { 190 if (set1->__bits[i] != set2->__bits[i]) 191 return (0); 192 } 193 return (1); 194 } 195 196 #ifdef _KERNEL 197 198 typedef void (*proc_func_t)(struct proc *); 199 200 struct pgrp; 201 struct proc; 202 struct sigio; 203 204 extern int sugid_coredump; /* Sysctl variable kern.sugid_coredump */ 205 extern sigset_t sigcantmask_mask; 206 207 /* 208 * Machine-independent functions: 209 */ 210 void execsigs (struct proc *p); 211 void gsignal (int pgid, int sig); 212 int issignal (struct lwp *lp, int maytrace, int *ptokp); 213 int iscaught (struct lwp *p); 214 void killproc (struct proc *p, char *why); 215 void pgsigio (struct sigio *, int signum, int checkctty); 216 void pgsignal (struct pgrp *pgrp, int sig, int checkctty); 217 void postsig (int sig, int ptok); 218 void ksignal (struct proc *p, int sig); 219 void lwpsignal (struct proc *p, struct lwp *lp, int sig); 220 void siginit (struct proc *p); 221 void trapsignal (struct lwp *p, int sig, u_long code); 222 223 /* 224 * Machine-dependent functions: 225 */ 226 void sendsig (sig_t action, int sig, sigset_t *retmask, u_long code); 227 void sigexit (struct lwp *lp, int sig) __dead2; 228 int checkpoint_signal_handler(struct lwp *p); 229 230 #endif /* _KERNEL */ 231 232 #endif /* !_SYS_SIGNALVAR_H_ */ 233