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signalvar.h
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signalvar.h
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/* $NetBSD: signalvar.h,v 1.102 2020/05/14 13:32:15 kamil Exp $ */
/*
* Copyright (c) 1991, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)signalvar.h 8.6 (Berkeley) 2/19/95
*/
#ifndef _SYS_SIGNALVAR_H_
#define _SYS_SIGNALVAR_H_
#include <sys/siginfo.h>
#include <sys/queue.h>
#include <sys/mutex.h>
#include <sys/stdbool.h>
#ifndef _KERNEL
#include <string.h> /* Required for memset(3) and memcpy(3) prototypes */
#endif /* _KERNEL */
/*
* Kernel signal definitions and data structures,
* not exported to user programs.
*/
/*
* Queue of signals.
*/
typedef TAILQ_HEAD(ksiginfoq, ksiginfo) ksiginfoq_t;
/*
* Process signal actions, possibly shared between processes.
*/
struct sigacts {
struct sigact_sigdesc {
struct sigaction sd_sigact;
const void *sd_tramp;
int sd_vers;
} sa_sigdesc[NSIG]; /* disposition of signals */
int sa_refcnt; /* reference count */
kmutex_t sa_mutex; /* lock on sa_refcnt */
};
/*
* Pending signals, per LWP and per process.
*/
typedef struct sigpend {
ksiginfoq_t sp_info;
sigset_t sp_set;
} sigpend_t;
/*
* Process signal state.
*/
struct sigctx {
struct _ksiginfo ps_info; /* for core dump/debugger XXX */
int ps_lwp; /* for core dump/debugger XXX */
bool ps_faked; /* for core dump/debugger XXX */
void *ps_sigcode; /* address of signal trampoline */
sigset_t ps_sigignore; /* Signals being ignored. */
sigset_t ps_sigcatch; /* Signals being caught by user. */
sigset_t ps_sigpass; /* Signals evading the debugger. */
};
/* additional signal action values, used only temporarily/internally */
#define SIG_CATCH (void (*)(int))2
/*
* get signal action for process and signal; currently only for current process
*/
#define SIGACTION(p, sig) (p->p_sigacts->sa_sigdesc[(sig)].sd_sigact)
#define SIGACTION_PS(ps, sig) (ps->sa_sigdesc[(sig)].sd_sigact)
/*
* Copy a sigaction structure without padding.
*/
static __inline void
sigaction_copy(struct sigaction *dst, const struct sigaction *src)
{
memset(dst, 0, sizeof(*dst));
dst->_sa_u._sa_handler = src->_sa_u._sa_handler;
memcpy(&dst->sa_mask, &src->sa_mask, sizeof(dst->sa_mask));
dst->sa_flags = src->sa_flags;
}
/*
* Signal properties and actions.
* The array below categorizes the signals and their default actions
* according to the following properties:
*/
#define SA_KILL 0x0001 /* terminates process by default */
#define SA_CORE 0x0002 /* ditto and coredumps */
#define SA_STOP 0x0004 /* suspend process */
#define SA_TTYSTOP 0x0008 /* ditto, from tty */
#define SA_IGNORE 0x0010 /* ignore by default */
#define SA_CONT 0x0020 /* continue if suspended */
#define SA_CANTMASK 0x0040 /* non-maskable, catchable */
#define SA_NORESET 0x0080 /* not reset when caught */
#define SA_TOLWP 0x0100 /* to LWP that generated, if local */
#define SA_TOALL 0x0200 /* always to all LWPs */
#ifdef _KERNEL
#include <sys/systm.h> /* for copyin_t/copyout_t */
extern sigset_t contsigmask, stopsigmask, sigcantmask;
struct vnode;
struct coredump_iostate;
/*
* Machine-independent functions:
*/
int coredump_netbsd(struct lwp *, struct coredump_iostate *);
int real_coredump_netbsd(struct lwp *, struct coredump_iostate *);
void execsigs(struct proc *);
int issignal(struct lwp *);
void pgsignal(struct pgrp *, int, int);
void kpgsignal(struct pgrp *, struct ksiginfo *, void *, int);
void postsig(int);
void psignal(struct proc *, int);
void kpsignal(struct proc *, struct ksiginfo *, void *);
void child_psignal(struct proc *, int);
void siginit(struct proc *);
void trapsignal(struct lwp *, struct ksiginfo *);
void sigexit(struct lwp *, int) __dead;
void killproc(struct proc *, const char *);
void setsigvec(struct proc *, int, struct sigaction *);
int killpg1(struct lwp *, struct ksiginfo *, int, int);
void proc_unstop(struct proc *p);
void eventswitch(int, int, int);
void eventswitchchild(struct proc *, int, int);
int sigaction1(struct lwp *, int, const struct sigaction *,
struct sigaction *, const void *, int);
int sigprocmask1(struct lwp *, int, const sigset_t *, sigset_t *);
void sigpending1(struct lwp *, sigset_t *);
void sigsuspendsetup(struct lwp *, const sigset_t *);
void sigsuspendteardown(struct lwp *);
int sigsuspend1(struct lwp *, const sigset_t *);
int sigaltstack1(struct lwp *, const struct sigaltstack *,
struct sigaltstack *);
int sigismasked(struct lwp *, int);
int sigget(sigpend_t *, ksiginfo_t *, int, const sigset_t *);
void sigclear(sigpend_t *, const sigset_t *, ksiginfoq_t *);
void sigclearall(struct proc *, const sigset_t *, ksiginfoq_t *);
int kpsignal2(struct proc *, ksiginfo_t *);
void signal_init(void);
struct sigacts *sigactsinit(struct proc *, int);
void sigactsunshare(struct proc *);
void sigactsfree(struct sigacts *);
void kpsendsig(struct lwp *, const struct ksiginfo *, const sigset_t *);
void sendsig_reset(struct lwp *, int);
void sendsig(const struct ksiginfo *, const sigset_t *);
ksiginfo_t *ksiginfo_alloc(struct proc *, ksiginfo_t *, int);
void ksiginfo_free(ksiginfo_t *);
void ksiginfo_queue_drain0(ksiginfoq_t *);
struct sys_____sigtimedwait50_args;
int sigtimedwait1(struct lwp *, const struct sys_____sigtimedwait50_args *,
register_t *, copyin_t, copyout_t, copyin_t, copyout_t);
void signotify(struct lwp *);
int sigispending(struct lwp *, int);
/*
* Machine-dependent functions:
*/
void sendsig_sigcontext(const struct ksiginfo *, const sigset_t *);
void sendsig_siginfo(const struct ksiginfo *, const sigset_t *);
extern struct pool ksiginfo_pool;
/*
* firstsig:
*
* Return the first signal in a signal set.
*/
static __inline int
firstsig(const sigset_t *ss)
{
int sig;
sig = ffs(ss->__bits[0]);
if (sig != 0)
return (sig);
#if NSIG > 33
sig = ffs(ss->__bits[1]);
if (sig != 0)
return (sig + 32);
#endif
#if NSIG > 65
sig = ffs(ss->__bits[2]);
if (sig != 0)
return (sig + 64);
#endif
#if NSIG > 97
sig = ffs(ss->__bits[3]);
if (sig != 0)
return (sig + 96);
#endif
return (0);
}
static __inline void
ksiginfo_queue_init(ksiginfoq_t *kq)
{
TAILQ_INIT(kq);
}
static __inline void
ksiginfo_queue_drain(ksiginfoq_t *kq)
{
if (!TAILQ_EMPTY(kq))
ksiginfo_queue_drain0(kq);
}
#endif /* _KERNEL */
#ifdef _KERNEL
#ifdef SIGPROP
const int sigprop[NSIG] = {
0, /* 0 unused */
SA_KILL, /* 1 SIGHUP */
SA_KILL, /* 2 SIGINT */
SA_KILL|SA_CORE, /* 3 SIGQUIT */
SA_KILL|SA_CORE|SA_NORESET|SA_TOLWP, /* 4 SIGILL */
SA_KILL|SA_CORE|SA_NORESET|SA_TOLWP, /* 5 SIGTRAP */
SA_KILL|SA_CORE, /* 6 SIGABRT */
SA_KILL|SA_CORE|SA_TOLWP, /* 7 SIGEMT */
SA_KILL|SA_CORE|SA_TOLWP, /* 8 SIGFPE */
SA_KILL|SA_CANTMASK|SA_TOALL, /* 9 SIGKILL */
SA_KILL|SA_CORE|SA_TOLWP, /* 10 SIGBUS */
SA_KILL|SA_CORE|SA_TOLWP, /* 11 SIGSEGV */
SA_KILL|SA_CORE|SA_TOLWP, /* 12 SIGSYS */
SA_KILL, /* 13 SIGPIPE */
SA_KILL, /* 14 SIGALRM */
SA_KILL, /* 15 SIGTERM */
SA_IGNORE, /* 16 SIGURG */
SA_STOP|SA_CANTMASK|SA_TOALL, /* 17 SIGSTOP */
SA_STOP|SA_TTYSTOP|SA_TOALL, /* 18 SIGTSTP */
SA_IGNORE|SA_CONT|SA_TOALL, /* 19 SIGCONT */
SA_IGNORE, /* 20 SIGCHLD */
SA_STOP|SA_TTYSTOP|SA_TOALL, /* 21 SIGTTIN */
SA_STOP|SA_TTYSTOP|SA_TOALL, /* 22 SIGTTOU */
SA_IGNORE, /* 23 SIGIO */
SA_KILL, /* 24 SIGXCPU */
SA_KILL, /* 25 SIGXFSZ */
SA_KILL, /* 26 SIGVTALRM */
SA_KILL, /* 27 SIGPROF */
SA_IGNORE, /* 28 SIGWINCH */
SA_IGNORE, /* 29 SIGINFO */
SA_KILL, /* 30 SIGUSR1 */
SA_KILL, /* 31 SIGUSR2 */
SA_IGNORE|SA_NORESET, /* 32 SIGPWR */
SA_KILL, /* 33 SIGRTMIN + 0 */
SA_KILL, /* 34 SIGRTMIN + 1 */
SA_KILL, /* 35 SIGRTMIN + 2 */
SA_KILL, /* 36 SIGRTMIN + 3 */
SA_KILL, /* 37 SIGRTMIN + 4 */
SA_KILL, /* 38 SIGRTMIN + 5 */
SA_KILL, /* 39 SIGRTMIN + 6 */
SA_KILL, /* 40 SIGRTMIN + 7 */
SA_KILL, /* 41 SIGRTMIN + 8 */
SA_KILL, /* 42 SIGRTMIN + 9 */
SA_KILL, /* 43 SIGRTMIN + 10 */
SA_KILL, /* 44 SIGRTMIN + 11 */
SA_KILL, /* 45 SIGRTMIN + 12 */
SA_KILL, /* 46 SIGRTMIN + 13 */
SA_KILL, /* 47 SIGRTMIN + 14 */
SA_KILL, /* 48 SIGRTMIN + 15 */
SA_KILL, /* 49 SIGRTMIN + 16 */
SA_KILL, /* 50 SIGRTMIN + 17 */
SA_KILL, /* 51 SIGRTMIN + 18 */
SA_KILL, /* 52 SIGRTMIN + 19 */
SA_KILL, /* 53 SIGRTMIN + 20 */
SA_KILL, /* 54 SIGRTMIN + 21 */
SA_KILL, /* 55 SIGRTMIN + 22 */
SA_KILL, /* 56 SIGRTMIN + 23 */
SA_KILL, /* 57 SIGRTMIN + 24 */
SA_KILL, /* 58 SIGRTMIN + 25 */
SA_KILL, /* 59 SIGRTMIN + 26 */
SA_KILL, /* 60 SIGRTMIN + 27 */
SA_KILL, /* 61 SIGRTMIN + 28 */
SA_KILL, /* 62 SIGRTMIN + 29 */
SA_KILL, /* 63 SIGRTMIN + 30 */
};
#undef SIGPROP
#else
extern const int sigprop[NSIG];
#endif /* SIGPROP */
#endif /* _KERNEL */
#endif /* !_SYS_SIGNALVAR_H_ */