Annotation of src/sys/sys/signalvar.h, Revision 1.78.2.1
1.78.2.1! jruoho 1: /* $NetBSD: signalvar.h,v 1.81 2011/05/28 15:33:41 christos Exp $ */
1.11 cgd 2:
1.1 cgd 3: /*
1.8 cgd 4: * Copyright (c) 1991, 1993
5: * The Regents of the University of California. All rights reserved.
1.1 cgd 6: *
7: * Redistribution and use in source and binary forms, with or without
8: * modification, are permitted provided that the following conditions
9: * are met:
10: * 1. Redistributions of source code must retain the above copyright
11: * notice, this list of conditions and the following disclaimer.
12: * 2. Redistributions in binary form must reproduce the above copyright
13: * notice, this list of conditions and the following disclaimer in the
14: * documentation and/or other materials provided with the distribution.
1.41 agc 15: * 3. Neither the name of the University nor the names of its contributors
1.1 cgd 16: * may be used to endorse or promote products derived from this software
17: * without specific prior written permission.
18: *
19: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29: * SUCH DAMAGE.
30: *
1.18 fvdl 31: * @(#)signalvar.h 8.6 (Berkeley) 2/19/95
1.1 cgd 32: */
33:
1.78 rmind 34: #ifndef _SYS_SIGNALVAR_H_
1.8 cgd 35: #define _SYS_SIGNALVAR_H_
1.1 cgd 36:
1.49 thorpej 37: #include <sys/siginfo.h>
1.44 christos 38: #include <sys/queue.h>
1.69 ad 39: #include <sys/mutex.h>
1.49 thorpej 40:
1.1 cgd 41: /*
42: * Kernel signal definitions and data structures,
43: * not exported to user programs.
44: */
45:
46: /*
1.69 ad 47: * Queue of signals.
48: */
49: typedef CIRCLEQ_HEAD(ksiginfoq, ksiginfo) ksiginfoq_t;
50:
51: /*
52: * Process signal actions, possibly shared between processes.
1.1 cgd 53: */
1.27 jdolecek 54: struct sigacts {
1.33 thorpej 55: struct sigact_sigdesc {
56: struct sigaction sd_sigact;
1.69 ad 57: const void *sd_tramp;
58: int sd_vers;
1.33 thorpej 59: } sa_sigdesc[NSIG]; /* disposition of signals */
1.27 jdolecek 60:
1.69 ad 61: int sa_refcnt; /* reference count */
62: kmutex_t sa_mutex; /* lock on sa_refcnt */
1.27 jdolecek 63: };
64:
65: /*
1.69 ad 66: * Pending signals, per LWP and per process.
67: */
68: typedef struct sigpend {
69: ksiginfoq_t sp_info;
70: sigset_t sp_set;
71: } sigpend_t;
72:
73: /*
1.27 jdolecek 74: * Process signal state.
75: */
1.43 christos 76: struct sigctx {
1.69 ad 77: int ps_signo; /* for core dump/debugger XXX */
78: int ps_code; /* for core dump/debugger XXX */
79: int ps_lwp; /* for core dump/debugger XXX */
80: void *ps_sigcode; /* address of signal trampoline */
81: sigset_t ps_sigignore; /* Signals being ignored. */
82: sigset_t ps_sigcatch; /* Signals being caught by user. */
1.1 cgd 83: };
84:
1.69 ad 85: /*
86: * Storage for items that may be either per-LWP (1:1 threads) or
87: * per-process (SA threads).
88: */
89: typedef struct sigstore {
90: stack_t ss_stk; /* p: sp & on stack state variable */
91: sigset_t ss_mask; /* p: signal mask */
92: } sigstore_t;
1.1 cgd 93:
94: /* additional signal action values, used only temporarily/internally */
1.54 perry 95: #define SIG_CATCH (void (*)(int))2
1.1 cgd 96:
97: /*
98: * get signal action for process and signal; currently only for current process
99: */
1.33 thorpej 100: #define SIGACTION(p, sig) (p->p_sigacts->sa_sigdesc[(sig)].sd_sigact)
101: #define SIGACTION_PS(ps, sig) (ps->sa_sigdesc[(sig)].sd_sigact)
1.28 thorpej 102:
103: /*
1.1 cgd 104: * Signal properties and actions.
105: * The array below categorizes the signals and their default actions
106: * according to the following properties:
107: */
1.69 ad 108: #define SA_KILL 0x0001 /* terminates process by default */
109: #define SA_CORE 0x0002 /* ditto and coredumps */
110: #define SA_STOP 0x0004 /* suspend process */
111: #define SA_TTYSTOP 0x0008 /* ditto, from tty */
112: #define SA_IGNORE 0x0010 /* ignore by default */
113: #define SA_CONT 0x0020 /* continue if suspended */
114: #define SA_CANTMASK 0x0040 /* non-maskable, catchable */
115: #define SA_NORESET 0x0080 /* not reset when caught */
116: #define SA_TOLWP 0x0100 /* to LWP that generated, if local */
117: #define SA_TOALL 0x0200 /* always to all LWPs */
1.1 cgd 118:
1.21 drochner 119: #ifdef _KERNEL
120:
1.61 cube 121: #include <sys/systm.h> /* for copyin_t/copyout_t */
122:
1.78.2.1! jruoho 123: extern sigset_t contsigmask, sigcantmask;
1.30 mrg 124:
125: struct vnode;
1.1 cgd 126:
127: /*
128: * Machine-independent functions:
129: */
1.55 matt 130: int coredump_netbsd(struct lwp *, void *);
1.54 perry 131: void execsigs(struct proc *);
132: int issignal(struct lwp *);
133: void pgsignal(struct pgrp *, int, int);
134: void kpgsignal(struct pgrp *, struct ksiginfo *, void *, int);
135: void postsig(int);
1.67 yamt 136: void psignal(struct proc *, int);
1.68 yamt 137: void kpsignal(struct proc *, struct ksiginfo *, void *);
1.69 ad 138: void child_psignal(struct proc *, int);
1.54 perry 139: void siginit(struct proc *);
1.69 ad 140: void trapsignal(struct lwp *, struct ksiginfo *);
1.54 perry 141: void sigexit(struct lwp *, int);
142: void killproc(struct proc *, const char *);
143: void setsigvec(struct proc *, int, struct sigaction *);
1.66 ad 144: int killpg1(struct lwp *, struct ksiginfo *, int, int);
1.69 ad 145: void proc_unstop(struct proc *p);
1.54 perry 146:
1.69 ad 147: int sigaction1(struct lwp *, int, const struct sigaction *,
1.54 perry 148: struct sigaction *, const void *, int);
1.69 ad 149: int sigprocmask1(struct lwp *, int, const sigset_t *, sigset_t *);
150: void sigpending1(struct lwp *, sigset_t *);
1.78.2.1! jruoho 151: void sigsuspendsetup(struct lwp *, const sigset_t *);
! 152: void sigsuspendteardown(struct lwp *);
1.69 ad 153: int sigsuspend1(struct lwp *, const sigset_t *);
154: int sigaltstack1(struct lwp *, const struct sigaltstack *,
1.54 perry 155: struct sigaltstack *);
1.69 ad 156: int sigismasked(struct lwp *, int);
157:
1.73 yamt 158: int sigget(sigpend_t *, ksiginfo_t *, int, const sigset_t *);
159: void sigclear(sigpend_t *, const sigset_t *, ksiginfoq_t *);
160: void sigclearall(struct proc *, const sigset_t *, ksiginfoq_t *);
1.69 ad 161:
162: void kpsignal2(struct proc *, ksiginfo_t *);
1.54 perry 163:
164: void signal_init(void);
165:
1.69 ad 166: struct sigacts *sigactsinit(struct proc *, int);
1.54 perry 167: void sigactsunshare(struct proc *);
168: void sigactsfree(struct sigacts *);
1.19 mycroft 169:
1.54 perry 170: void kpsendsig(struct lwp *, const struct ksiginfo *, const sigset_t *);
1.69 ad 171: void sendsig_reset(struct lwp *, int);
1.74 ad 172: void sendsig(const struct ksiginfo *, const sigset_t *);
1.69 ad 173:
1.59 chs 174: siginfo_t *siginfo_alloc(int);
175: void siginfo_free(void *);
1.37 thorpej 176:
1.69 ad 177: ksiginfo_t *ksiginfo_alloc(struct proc *, ksiginfo_t *, int);
178: void ksiginfo_free(ksiginfo_t *);
179: void ksiginfo_queue_drain0(ksiginfoq_t *);
180:
1.75 christos 181: struct sys_____sigtimedwait50_args;
1.76 pooka 182: int sigtimedwait1(struct lwp *, const struct sys_____sigtimedwait50_args *,
183: register_t *, copyout_t, copyin_t, copyout_t);
1.57 cube 184:
1.69 ad 185: void signotify(struct lwp *);
186: int sigispending(struct lwp *, int);
187:
1.1 cgd 188: /*
189: * Machine-dependent functions:
190: */
1.74 ad 191: void sendsig_sigcontext(const struct ksiginfo *, const sigset_t *);
192: void sendsig_siginfo(const struct ksiginfo *, const sigset_t *);
1.20 thorpej 193:
1.69 ad 194: extern struct pool ksiginfo_pool;
195:
196: /*
1.74 ad 197: * Modularity / compatibility.
198: */
199: extern void (*sendsig_sigcontext_vec)(const struct ksiginfo *,
200: const sigset_t *);
201: extern int (*coredump_vec)(struct lwp *, const char *);
202:
203: /*
1.69 ad 204: * firstsig:
205: *
206: * Return the first signal in a signal set.
207: */
208: static inline int
209: firstsig(const sigset_t *ss)
210: {
211: int sig;
212:
213: sig = ffs(ss->__bits[0]);
214: if (sig != 0)
215: return (sig);
216: #if NSIG > 33
217: sig = ffs(ss->__bits[1]);
218: if (sig != 0)
219: return (sig + 32);
220: #endif
221: #if NSIG > 65
222: sig = ffs(ss->__bits[2]);
223: if (sig != 0)
224: return (sig + 64);
225: #endif
226: #if NSIG > 97
227: sig = ffs(ss->__bits[3]);
228: if (sig != 0)
229: return (sig + 96);
230: #endif
231: return (0);
232: }
233:
234: static inline void
235: ksiginfo_queue_init(ksiginfoq_t *kq)
236: {
237: CIRCLEQ_INIT(kq);
238: }
239:
240: static inline void
241: ksiginfo_queue_drain(ksiginfoq_t *kq)
242: {
243: if (!CIRCLEQ_EMPTY(kq))
244: ksiginfo_queue_drain0(kq);
245: }
246:
1.13 jtc 247: #endif /* _KERNEL */
1.35 matt 248:
249: #ifdef _KERNEL
250: #ifdef SIGPROP
251: const int sigprop[NSIG] = {
1.69 ad 252: 0, /* 0 unused */
253: SA_KILL, /* 1 SIGHUP */
254: SA_KILL, /* 2 SIGINT */
255: SA_KILL|SA_CORE, /* 3 SIGQUIT */
256: SA_KILL|SA_CORE|SA_NORESET|SA_TOLWP, /* 4 SIGILL */
257: SA_KILL|SA_CORE|SA_NORESET|SA_TOLWP, /* 5 SIGTRAP */
258: SA_KILL|SA_CORE, /* 6 SIGABRT */
259: SA_KILL|SA_CORE|SA_TOLWP, /* 7 SIGEMT */
260: SA_KILL|SA_CORE|SA_TOLWP, /* 8 SIGFPE */
261: SA_KILL|SA_CANTMASK|SA_TOALL, /* 9 SIGKILL */
262: SA_KILL|SA_CORE|SA_TOLWP, /* 10 SIGBUS */
263: SA_KILL|SA_CORE|SA_TOLWP, /* 11 SIGSEGV */
264: SA_KILL|SA_CORE|SA_TOLWP, /* 12 SIGSYS */
265: SA_KILL, /* 13 SIGPIPE */
266: SA_KILL, /* 14 SIGALRM */
267: SA_KILL, /* 15 SIGTERM */
268: SA_IGNORE, /* 16 SIGURG */
269: SA_STOP|SA_CANTMASK|SA_TOALL, /* 17 SIGSTOP */
270: SA_STOP|SA_TTYSTOP|SA_TOALL, /* 18 SIGTSTP */
271: SA_IGNORE|SA_CONT|SA_TOALL, /* 19 SIGCONT */
272: SA_IGNORE, /* 20 SIGCHLD */
273: SA_STOP|SA_TTYSTOP|SA_TOALL, /* 21 SIGTTIN */
274: SA_STOP|SA_TTYSTOP|SA_TOALL, /* 22 SIGTTOU */
275: SA_IGNORE, /* 23 SIGIO */
276: SA_KILL, /* 24 SIGXCPU */
277: SA_KILL, /* 25 SIGXFSZ */
278: SA_KILL, /* 26 SIGVTALRM */
279: SA_KILL, /* 27 SIGPROF */
280: SA_IGNORE, /* 28 SIGWINCH */
281: SA_IGNORE, /* 29 SIGINFO */
282: SA_KILL, /* 30 SIGUSR1 */
283: SA_KILL, /* 31 SIGUSR2 */
284: SA_IGNORE|SA_NORESET, /* 32 SIGPWR */
285: SA_KILL, /* 33 SIGRTMIN + 0 */
286: SA_KILL, /* 34 SIGRTMIN + 1 */
287: SA_KILL, /* 35 SIGRTMIN + 2 */
288: SA_KILL, /* 36 SIGRTMIN + 3 */
289: SA_KILL, /* 37 SIGRTMIN + 4 */
290: SA_KILL, /* 38 SIGRTMIN + 5 */
291: SA_KILL, /* 39 SIGRTMIN + 6 */
292: SA_KILL, /* 40 SIGRTMIN + 7 */
293: SA_KILL, /* 41 SIGRTMIN + 8 */
294: SA_KILL, /* 42 SIGRTMIN + 9 */
295: SA_KILL, /* 43 SIGRTMIN + 10 */
296: SA_KILL, /* 44 SIGRTMIN + 11 */
297: SA_KILL, /* 45 SIGRTMIN + 12 */
298: SA_KILL, /* 46 SIGRTMIN + 13 */
299: SA_KILL, /* 47 SIGRTMIN + 14 */
300: SA_KILL, /* 48 SIGRTMIN + 15 */
301: SA_KILL, /* 49 SIGRTMIN + 16 */
302: SA_KILL, /* 50 SIGRTMIN + 17 */
303: SA_KILL, /* 51 SIGRTMIN + 18 */
304: SA_KILL, /* 52 SIGRTMIN + 19 */
305: SA_KILL, /* 53 SIGRTMIN + 20 */
306: SA_KILL, /* 54 SIGRTMIN + 21 */
307: SA_KILL, /* 55 SIGRTMIN + 22 */
308: SA_KILL, /* 56 SIGRTMIN + 23 */
309: SA_KILL, /* 57 SIGRTMIN + 24 */
310: SA_KILL, /* 58 SIGRTMIN + 25 */
311: SA_KILL, /* 59 SIGRTMIN + 26 */
312: SA_KILL, /* 60 SIGRTMIN + 27 */
313: SA_KILL, /* 61 SIGRTMIN + 28 */
314: SA_KILL, /* 62 SIGRTMIN + 29 */
315: SA_KILL, /* 63 SIGRTMIN + 30 */
1.35 matt 316: };
317: #undef SIGPROP
318: #else
319: extern const int sigprop[NSIG];
320: #endif /* SIGPROP */
321: #endif /* _KERNEL */
1.56 christos 322: #endif /* !_SYS_SIGNALVAR_H_ */
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