| 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_ */ |