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. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)signalvar.h 8.6 (Berkeley) 2/19/95 34 * $FreeBSD: src/sys/sys/signalvar.h,v 1.34.2.1 2000/05/16 06:58:05 dillon Exp $ 35 * $DragonFly: src/sys/sys/signalvar.h,v 1.10 2003/11/21 22:46:13 dillon Exp $ 36 */ 37 38 #ifndef _SYS_SIGNALVAR_H_ /* tmp for user.h */ 39 #define _SYS_SIGNALVAR_H_ 40 41 /* 42 * Don't bring in the entire bleeding include set if we aren't the kernel. 43 * Userland is not allowed to bring in sys/proc.h except under special 44 * circumstances (e.g. sys/user.h) 45 */ 46 #include <sys/signal.h> 47 #ifdef _KERNEL 48 #include <sys/proc.h> 49 #include <machine/lock.h> 50 #endif 51 52 /* 53 * Kernel signal definitions and data structures, 54 * not exported to user programs. 55 */ 56 57 /* 58 * Process signal actions and state, needed only within the process 59 * (not necessarily resident). 60 */ 61 struct sigacts { 62 sig_t ps_sigact[_SIG_MAXSIG]; /* disposition of signals */ 63 sigset_t ps_catchmask[_SIG_MAXSIG]; /* signals to be blocked */ 64 sigset_t ps_sigonstack; /* signals to take on sigstack */ 65 sigset_t ps_sigintr; /* signals that interrupt syscalls */ 66 sigset_t ps_sigreset; /* signals that reset when caught */ 67 sigset_t ps_signodefer; /* signals not masked while handled */ 68 sigset_t ps_siginfo; /* signals that want SA_SIGINFO args */ 69 sigset_t ps_usertramp; /* SunOS compat; libc sigtramp XXX */ 70 }; 71 72 /* additional signal action values, used only temporarily/internally */ 73 #define SIG_CATCH ((__sighandler_t *)2) 74 #define SIG_HOLD ((__sighandler_t *)3) 75 76 #ifdef _KERNEL 77 78 /* 79 * get signal action for process and signal; currently only for current process 80 */ 81 #define SIGACTION(p, sig) (p->p_sigacts->ps_sigact[_SIG_IDX(sig)]) 82 83 #endif 84 85 /* 86 * sigset_t manipulation macros 87 */ 88 #define SIGADDSET(set, signo) \ 89 (set).__bits[_SIG_WORD(signo)] |= _SIG_BIT(signo) 90 91 #define SIGDELSET(set, signo) \ 92 (set).__bits[_SIG_WORD(signo)] &= ~_SIG_BIT(signo) 93 94 #define SIGEMPTYSET(set) \ 95 do { \ 96 int __i; \ 97 for (__i = 0; __i < _SIG_WORDS; __i++) \ 98 (set).__bits[__i] = 0; \ 99 } while (0) 100 101 #define SIGFILLSET(set) \ 102 do { \ 103 int __i; \ 104 for (__i = 0; __i < _SIG_WORDS; __i++) \ 105 (set).__bits[__i] = ~(unsigned int)0; \ 106 } while (0) 107 108 #define SIGISMEMBER(set, signo) \ 109 ((set).__bits[_SIG_WORD(signo)] & _SIG_BIT(signo)) 110 111 #define SIGISEMPTY(set) __sigisempty(&(set)) 112 #define SIGNOTEMPTY(set) (!__sigisempty(&(set))) 113 114 #define SIGSETEQ(set1, set2) __sigseteq(&(set1), &(set2)) 115 #define SIGSETNEQ(set1, set2) (!__sigseteq(&(set1), &(set2))) 116 117 #define SIGSETOR(set1, set2) \ 118 do { \ 119 int __i; \ 120 for (__i = 0; __i < _SIG_WORDS; __i++) \ 121 (set1).__bits[__i] |= (set2).__bits[__i]; \ 122 } while (0) 123 124 #define SIGSETAND(set1, set2) \ 125 do { \ 126 int __i; \ 127 for (__i = 0; __i < _SIG_WORDS; __i++) \ 128 (set1).__bits[__i] &= (set2).__bits[__i]; \ 129 } while (0) 130 131 #define SIGSETNAND(set1, set2) \ 132 do { \ 133 int __i; \ 134 for (__i = 0; __i < _SIG_WORDS; __i++) \ 135 (set1).__bits[__i] &= ~(set2).__bits[__i]; \ 136 } while (0) 137 138 #define SIG_CANTMASK(set) \ 139 SIGDELSET(set, SIGKILL), SIGDELSET(set, SIGSTOP) 140 141 #define SIG_STOPSIGMASK(set) \ 142 SIGDELSET(set, SIGSTOP), SIGDELSET(set, SIGTSTP), \ 143 SIGDELSET(set, SIGTTIN), SIGDELSET(set, SIGTTOU) 144 145 #define SIG_CONTSIGMASK(set) \ 146 SIGDELSET(set, SIGCONT) 147 148 #define sigcantmask (sigmask(SIGKILL) | sigmask(SIGSTOP)) 149 150 static __inline int 151 __sigisempty(sigset_t *set) 152 { 153 int i; 154 155 for (i = 0; i < _SIG_WORDS; i++) { 156 if (set->__bits[i]) 157 return (0); 158 } 159 return (1); 160 } 161 162 static __inline int 163 __sigseteq(sigset_t *set1, sigset_t *set2) 164 { 165 int i; 166 167 for (i = 0; i < _SIG_WORDS; i++) { 168 if (set1->__bits[i] != set2->__bits[i]) 169 return (0); 170 } 171 return (1); 172 } 173 174 #ifdef _KERNEL 175 176 typedef void (*proc_func_t)(struct proc *); 177 178 struct pgrp; 179 struct proc; 180 struct sigio; 181 struct vmupcall; 182 183 extern int sugid_coredump; /* Sysctl variable kern.sugid_coredump */ 184 185 /* 186 * Machine-independent functions: 187 */ 188 void check_sigacts (void); 189 void execsigs (struct proc *p); 190 void gsignal (int pgid, int sig); 191 int issignal (struct proc *p); 192 void killproc (struct proc *p, char *why); 193 void pgsigio (struct sigio *, int signum, int checkctty); 194 void pgsignal (struct pgrp *pgrp, int sig, int checkctty); 195 void postsig (int sig); 196 void psignal (struct proc *p, int sig); 197 void siginit (struct proc *p); 198 void trapsignal (struct proc *p, int sig, u_long code); 199 int __cursig (struct proc *p); 200 proc_func_t register_ckpt_func(proc_func_t func); 201 202 203 /* 204 * Machine-dependent functions: 205 */ 206 void sendsig (sig_t action, int sig, sigset_t *retmask, u_long code); 207 void sendupcall (struct vmupcall *vu, int morepending); 208 int fetchupcall (struct vmupcall *vu, int morepending, void *rsp); 209 void sigexit (struct proc *p, int sig); 210 211 /* 212 * Inline functions: 213 */ 214 #define CURSIG(p) __cursig(p) 215 216 /* 217 * Determine signal that should be delivered to process p, the current 218 * process, 0 if none. If there is a pending stop signal with default 219 * action, the process stops in issignal(). 220 * 221 * MP SAFE 222 */ 223 extern __inline int __cursig(struct proc *p) 224 { 225 sigset_t tmpset; 226 int r; 227 228 tmpset = p->p_siglist; 229 SIGSETNAND(tmpset, p->p_sigmask); 230 if (SIGISEMPTY(p->p_siglist) || 231 (!(p->p_flag & P_TRACED) && SIGISEMPTY(tmpset))) { 232 return(0); 233 } 234 r = issignal(p); 235 return(r); 236 } 237 238 #endif /* _KERNEL */ 239 240 #endif /* !_SYS_SIGNALVAR_H_ */ 241