2 * Copyright (c) 1991, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
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 1.17 2007/02/03 17:05:59 corecode Exp $
38 #ifndef _SYS_SIGNALVAR_H_ /* tmp for user.h */
39 #define _SYS_SIGNALVAR_H_
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)
46 #include <sys/signal.h>
49 #include <machine/lock.h>
53 * Kernel signal definitions and data structures,
54 * not exported to user programs.
58 * Process signal actions and state, needed only within the process
59 * (not necessarily resident).
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 sigset_t ps_sigmailbox; /* signals that update a mailbox */
73 /* additional signal action values, used only temporarily/internally */
74 #define SIG_CATCH ((__sighandler_t *)2)
75 #define SIG_HOLD ((__sighandler_t *)3)
80 * get signal action for process and signal; currently only for current process
82 #define SIGACTION(p, sig) (p->p_sigacts->ps_sigact[_SIG_IDX(sig)])
87 * sigset_t manipulation macros
89 #define SIGADDSET(set, signo) \
90 (set).__bits[_SIG_WORD(signo)] |= _SIG_BIT(signo)
92 #define SIGDELSET(set, signo) \
93 (set).__bits[_SIG_WORD(signo)] &= ~_SIG_BIT(signo)
95 #define SIGEMPTYSET(set) \
98 for (__i = 0; __i < _SIG_WORDS; __i++) \
99 (set).__bits[__i] = 0; \
102 #define SIGFILLSET(set) \
105 for (__i = 0; __i < _SIG_WORDS; __i++) \
106 (set).__bits[__i] = ~(unsigned int)0; \
109 #define SIGISMEMBER(set, signo) \
110 ((set).__bits[_SIG_WORD(signo)] & _SIG_BIT(signo))
112 #define SIGISEMPTY(set) __sigisempty(&(set))
113 #define SIGNOTEMPTY(set) (!__sigisempty(&(set)))
115 #define SIGSETEQ(set1, set2) __sigseteq(&(set1), &(set2))
116 #define SIGSETNEQ(set1, set2) (!__sigseteq(&(set1), &(set2)))
118 #define SIGSETOR(set1, set2) \
121 for (__i = 0; __i < _SIG_WORDS; __i++) \
122 (set1).__bits[__i] |= (set2).__bits[__i]; \
125 #define SIGSETAND(set1, set2) \
128 for (__i = 0; __i < _SIG_WORDS; __i++) \
129 (set1).__bits[__i] &= (set2).__bits[__i]; \
132 #define SIGSETNAND(set1, set2) \
135 for (__i = 0; __i < _SIG_WORDS; __i++) \
136 (set1).__bits[__i] &= ~(set2).__bits[__i]; \
139 #define SIG_CANTMASK(set) \
140 SIGDELSET(set, SIGKILL), SIGDELSET(set, SIGSTOP)
142 #define SIG_STOPSIGMASK(set) \
143 SIGDELSET(set, SIGSTOP), SIGDELSET(set, SIGTSTP), \
144 SIGDELSET(set, SIGTTIN), SIGDELSET(set, SIGTTOU)
146 #define SIG_CONTSIGMASK(set) \
147 SIGDELSET(set, SIGCONT)
149 #define sigcantmask (sigmask(SIGKILL) | sigmask(SIGSTOP))
152 __sigisempty(sigset_t *set)
156 for (i = 0; i < _SIG_WORDS; i++) {
164 __sigseteq(sigset_t *set1, sigset_t *set2)
168 for (i = 0; i < _SIG_WORDS; i++) {
169 if (set1->__bits[i] != set2->__bits[i])
177 typedef void (*proc_func_t)(struct proc *);
184 extern int sugid_coredump; /* Sysctl variable kern.sugid_coredump */
187 * Machine-independent functions:
189 void check_sigacts (void);
190 void execsigs (struct proc *p);
191 void gsignal (int pgid, int sig);
192 int issignal (struct lwp *lp);
193 int iscaught (struct lwp *p);
194 void killproc (struct proc *p, char *why);
195 void pgsigio (struct sigio *, int signum, int checkctty);
196 void pgsignal (struct pgrp *pgrp, int sig, int checkctty);
197 void postsig (int sig);
198 void ksignal (struct proc *p, int sig);
199 void siginit (struct proc *p);
200 void trapsignal (struct lwp *p, int sig, u_long code);
201 static int __cursig (struct lwp *p);
204 * Machine-dependent functions:
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 int checkpoint_signal_handler(struct proc *p);
215 #define CURSIG(lp) __cursig(lp)
216 #define CURSIGNB(lp) __cursignb(lp)
219 * Determine signal that should be delivered to process p, the current
220 * process, 0 if none. If there is a pending stop signal with default
221 * action, the process stops in issignal().
227 __cursig(struct lwp *lp)
234 tmpset = p->p_siglist;
235 SIGSETOR(tmpset, lp->lwp_siglist);
236 SIGSETNAND(tmpset, lp->lwp_sigmask);
237 if (!(p->p_flag & P_TRACED) && SIGISEMPTY(tmpset))
245 __cursignb(struct lwp *lp)
251 tmpset = p->p_siglist;
252 SIGSETOR(tmpset, lp->lwp_siglist);
253 SIGSETNAND(tmpset, lp->lwp_sigmask);
254 if ((!(p->p_flag & P_TRACED) && SIGISEMPTY(tmpset))) {
262 #endif /* !_SYS_SIGNALVAR_H_ */