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Diffstat (limited to 'freebsd/sys/sys/signalvar.h')
| -rw-r--r-- | freebsd/sys/sys/signalvar.h | 403 |
1 files changed, 403 insertions, 0 deletions
diff --git a/freebsd/sys/sys/signalvar.h b/freebsd/sys/sys/signalvar.h new file mode 100644 index 00000000..a2a1d0d8 --- /dev/null +++ b/freebsd/sys/sys/signalvar.h @@ -0,0 +1,403 @@ +/*- + * 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. + * 4. 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 + * $FreeBSD$ + */ + +#ifndef _SYS_SIGNALVAR_H_ +#define _SYS_SIGNALVAR_H_ + +#include <sys/queue.h> +#include <sys/_lock.h> +#include <sys/_mutex.h> +#include <sys/signal.h> + +#ifndef __rtems__ +/* + * Kernel signal definitions and data structures. + */ + +/* + * Logical process signal actions and state, needed only within the process + * The mapping between sigacts and proc structures is 1:1 except for rfork() + * processes masquerading as threads which use one structure for the whole + * group. All members are locked by the included mutex. The reference count + * and mutex must be last for the bcopy in sigacts_copy() to work. + */ +struct sigacts { + sig_t ps_sigact[_SIG_MAXSIG]; /* Disposition of signals. */ + sigset_t ps_catchmask[_SIG_MAXSIG]; /* Signals to be blocked. */ + sigset_t ps_sigonstack; /* Signals to take on sigstack. */ + sigset_t ps_sigintr; /* Signals that interrupt syscalls. */ + sigset_t ps_sigreset; /* Signals that reset when caught. */ + sigset_t ps_signodefer; /* Signals not masked while handled. */ + sigset_t ps_siginfo; /* Signals that want SA_SIGINFO args. */ + sigset_t ps_sigignore; /* Signals being ignored. */ + sigset_t ps_sigcatch; /* Signals being caught by user. */ + sigset_t ps_freebsd4; /* Signals using freebsd4 ucontext. */ + sigset_t ps_osigset; /* Signals using <= 3.x osigset_t. */ + sigset_t ps_usertramp; /* SunOS compat; libc sigtramp. XXX */ + int ps_flag; + u_int ps_refcnt; + struct mtx ps_mtx; +}; + +#define PS_NOCLDWAIT 0x0001 /* No zombies if child dies */ +#define PS_NOCLDSTOP 0x0002 /* No SIGCHLD when children stop. */ +#define PS_CLDSIGIGN 0x0004 /* The SIGCHLD handler is SIG_IGN. */ + +#ifdef _KERNEL + +#ifdef COMPAT_43 +typedef struct { + struct osigcontext si_sc; + int si_signo; + int si_code; + union sigval si_value; +} osiginfo_t; + +struct osigaction { + union { + void (*__sa_handler)(int); + void (*__sa_sigaction)(int, osiginfo_t *, void *); + } __sigaction_u; /* signal handler */ + osigset_t sa_mask; /* signal mask to apply */ + int sa_flags; /* see signal options below */ +}; + +typedef void __osiginfohandler_t(int, osiginfo_t *, void *); +#endif /* COMPAT_43 */ + +/* additional signal action values, used only temporarily/internally */ +#define SIG_CATCH ((__sighandler_t *)2) +/* #define SIG_HOLD ((__sighandler_t *)3) See signal.h */ + +/* + * get signal action for process and signal; currently only for current process + */ +#define SIGACTION(p, sig) (p->p_sigacts->ps_sigact[_SIG_IDX(sig)]) + +#endif /* _KERNEL */ + +/* + * sigset_t manipulation macros. + */ +#define SIGADDSET(set, signo) \ + ((set).__bits[_SIG_WORD(signo)] |= _SIG_BIT(signo)) + +#define SIGDELSET(set, signo) \ + ((set).__bits[_SIG_WORD(signo)] &= ~_SIG_BIT(signo)) + +#define SIGEMPTYSET(set) \ + do { \ + int __i; \ + for (__i = 0; __i < _SIG_WORDS; __i++) \ + (set).__bits[__i] = 0; \ + } while (0) + +#define SIGFILLSET(set) \ + do { \ + int __i; \ + for (__i = 0; __i < _SIG_WORDS; __i++) \ + (set).__bits[__i] = ~0U; \ + } while (0) + +#define SIGISMEMBER(set, signo) \ + ((set).__bits[_SIG_WORD(signo)] & _SIG_BIT(signo)) + +#define SIGISEMPTY(set) (__sigisempty(&(set))) +#define SIGNOTEMPTY(set) (!__sigisempty(&(set))) + +#define SIGSETEQ(set1, set2) (__sigseteq(&(set1), &(set2))) +#define SIGSETNEQ(set1, set2) (!__sigseteq(&(set1), &(set2))) + +#define SIGSETOR(set1, set2) \ + do { \ + int __i; \ + for (__i = 0; __i < _SIG_WORDS; __i++) \ + (set1).__bits[__i] |= (set2).__bits[__i]; \ + } while (0) + +#define SIGSETAND(set1, set2) \ + do { \ + int __i; \ + for (__i = 0; __i < _SIG_WORDS; __i++) \ + (set1).__bits[__i] &= (set2).__bits[__i]; \ + } while (0) + +#define SIGSETNAND(set1, set2) \ + do { \ + int __i; \ + for (__i = 0; __i < _SIG_WORDS; __i++) \ + (set1).__bits[__i] &= ~(set2).__bits[__i]; \ + } while (0) + +#define SIGSETLO(set1, set2) ((set1).__bits[0] = (set2).__bits[0]) +#define SIGSETOLD(set, oset) ((set).__bits[0] = (oset)) + +#define SIG_CANTMASK(set) \ + SIGDELSET(set, SIGKILL), SIGDELSET(set, SIGSTOP) + +#define SIG_STOPSIGMASK(set) \ + SIGDELSET(set, SIGSTOP), SIGDELSET(set, SIGTSTP), \ + SIGDELSET(set, SIGTTIN), SIGDELSET(set, SIGTTOU) + +#define SIG_CONTSIGMASK(set) \ + SIGDELSET(set, SIGCONT) + +#define sigcantmask (sigmask(SIGKILL) | sigmask(SIGSTOP)) + +#define SIG2OSIG(sig, osig) (osig = (sig).__bits[0]) +#define OSIG2SIG(osig, sig) SIGEMPTYSET(sig); (sig).__bits[0] = osig + +static __inline int +__sigisempty(sigset_t *set) +{ + int i; + + for (i = 0; i < _SIG_WORDS; i++) { + if (set->__bits[i]) + return (0); + } + return (1); +} + +static __inline int +__sigseteq(sigset_t *set1, sigset_t *set2) +{ + int i; + + for (i = 0; i < _SIG_WORDS; i++) { + if (set1->__bits[i] != set2->__bits[i]) + return (0); + } + return (1); +} + +#ifdef COMPAT_FREEBSD6 +struct osigevent { + int sigev_notify; /* Notification type */ + union { + int __sigev_signo; /* Signal number */ + int __sigev_notify_kqueue; + } __sigev_u; + union sigval sigev_value; /* Signal value */ +}; +#endif + +typedef struct ksiginfo { + TAILQ_ENTRY(ksiginfo) ksi_link; + siginfo_t ksi_info; + int ksi_flags; + struct sigqueue *ksi_sigq; +} ksiginfo_t; + +#define ksi_signo ksi_info.si_signo +#define ksi_errno ksi_info.si_errno +#define ksi_code ksi_info.si_code +#define ksi_pid ksi_info.si_pid +#define ksi_uid ksi_info.si_uid +#define ksi_status ksi_info.si_status +#define ksi_addr ksi_info.si_addr +#define ksi_value ksi_info.si_value +#define ksi_band ksi_info.si_band +#define ksi_trapno ksi_info.si_trapno +#define ksi_overrun ksi_info.si_overrun +#define ksi_timerid ksi_info.si_timerid +#define ksi_mqd ksi_info.si_mqd + +/* bits for ksi_flags */ +#define KSI_TRAP 0x01 /* Generated by trap. */ +#define KSI_EXT 0x02 /* Externally managed ksi. */ +#define KSI_INS 0x04 /* Directly insert ksi, not the copy */ +#define KSI_SIGQ 0x08 /* Generated by sigqueue, might ret EGAIN. */ +#define KSI_HEAD 0x10 /* Insert into head, not tail. */ +#define KSI_COPYMASK (KSI_TRAP|KSI_SIGQ) + +#define KSI_ONQ(ksi) ((ksi)->ksi_sigq != NULL) + +typedef struct sigqueue { + sigset_t sq_signals; /* All pending signals. */ + sigset_t sq_kill; /* Legacy depth 1 queue. */ + TAILQ_HEAD(, ksiginfo) sq_list;/* Queued signal info. */ + struct proc *sq_proc; + int sq_flags; +} sigqueue_t; + +/* Flags for ksi_flags */ +#define SQ_INIT 0x01 + +#ifdef _KERNEL + +/* Return nonzero if process p has an unmasked pending signal. */ +#define SIGPENDING(td) \ + ((!SIGISEMPTY((td)->td_siglist) && \ + !sigsetmasked(&(td)->td_siglist, &(td)->td_sigmask)) || \ + (!SIGISEMPTY((td)->td_proc->p_siglist) && \ + !sigsetmasked(&(td)->td_proc->p_siglist, &(td)->td_sigmask))) +/* + * Return the value of the pseudo-expression ((*set & ~*mask) != 0). This + * is an optimized version of SIGISEMPTY() on a temporary variable + * containing SIGSETNAND(*set, *mask). + */ +static __inline int +sigsetmasked(sigset_t *set, sigset_t *mask) +{ + int i; + + for (i = 0; i < _SIG_WORDS; i++) { + if (set->__bits[i] & ~mask->__bits[i]) + return (0); + } + return (1); +} + +#define ksiginfo_init(ksi) \ +do { \ + bzero(ksi, sizeof(ksiginfo_t)); \ +} while(0) + +#define ksiginfo_init_trap(ksi) \ +do { \ + ksiginfo_t *kp = ksi; \ + bzero(kp, sizeof(ksiginfo_t)); \ + kp->ksi_flags |= KSI_TRAP; \ +} while(0) + +static __inline void +ksiginfo_copy(ksiginfo_t *src, ksiginfo_t *dst) +{ + (dst)->ksi_info = src->ksi_info; + (dst)->ksi_flags = (src->ksi_flags & KSI_COPYMASK); +} + +static __inline void +ksiginfo_set_sigev(ksiginfo_t *dst, struct sigevent *sigev) +{ + dst->ksi_signo = sigev->sigev_signo; + dst->ksi_value = sigev->sigev_value; +} + +struct pgrp; +struct proc; +struct sigio; +struct thread; + +/* + * Lock the pointers for a sigio object in the underlying objects of + * a file descriptor. + */ +#define SIGIO_LOCK() mtx_lock(&sigio_lock) +#define SIGIO_TRYLOCK() mtx_trylock(&sigio_lock) +#define SIGIO_UNLOCK() mtx_unlock(&sigio_lock) +#define SIGIO_LOCKED() mtx_owned(&sigio_lock) +#define SIGIO_ASSERT(type) mtx_assert(&sigio_lock, type) + +extern struct mtx sigio_lock; + +/* Flags for kern_sigprocmask(). */ +#define SIGPROCMASK_OLD 0x0001 +#define SIGPROCMASK_PROC_LOCKED 0x0002 +#define SIGPROCMASK_PS_LOCKED 0x0004 + +/* + * Modes for sigdeferstop(). Manages behaviour of + * thread_suspend_check() in the region delimited by + * sigdeferstop()/sigallowstop(). Must be restored to + * SIGDEFERSTOP_OFF before returning to userspace. + */ +#define SIGDEFERSTOP_NOP 0 /* continue doing whatever is done now */ +#define SIGDEFERSTOP_OFF 1 /* stop ignoring STOPs */ +#define SIGDEFERSTOP_SILENT 2 /* silently ignore STOPs */ +#define SIGDEFERSTOP_EINTR 3 /* ignore STOPs, return EINTR */ +#define SIGDEFERSTOP_ERESTART 4 /* ignore STOPs, return ERESTART */ + +#define SIGDEFERSTOP_VAL_NCHG (-1) /* placeholder indicating no state change */ +int sigdeferstop_impl(int mode); +void sigallowstop_impl(int prev); + +static inline int +sigdeferstop(int mode) +{ + + if (mode == SIGDEFERSTOP_NOP) + return (SIGDEFERSTOP_VAL_NCHG); + return (sigdeferstop_impl(mode)); +} + +static inline void +sigallowstop(int prev) +{ + + if (prev == SIGDEFERSTOP_VAL_NCHG) + return; + sigallowstop_impl(prev); +} + +int cursig(struct thread *td); +void execsigs(struct proc *p); +void gsignal(int pgid, int sig, ksiginfo_t *ksi); +void killproc(struct proc *p, char *why); +ksiginfo_t * ksiginfo_alloc(int wait); +void ksiginfo_free(ksiginfo_t *ksi); +int pksignal(struct proc *p, int sig, ksiginfo_t *ksi); +void pgsigio(struct sigio **sigiop, int sig, int checkctty); +void pgsignal(struct pgrp *pgrp, int sig, int checkctty, ksiginfo_t *ksi); +int postsig(int sig); +void kern_psignal(struct proc *p, int sig); +int ptracestop(struct thread *td, int sig); +void sendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *retmask); +struct sigacts *sigacts_alloc(void); +void sigacts_copy(struct sigacts *dest, struct sigacts *src); +void sigacts_free(struct sigacts *ps); +struct sigacts *sigacts_hold(struct sigacts *ps); +int sigacts_shared(struct sigacts *ps); +void sigexit(struct thread *td, int sig) __dead2; +int sigev_findtd(struct proc *p, struct sigevent *sigev, struct thread **); +int sig_ffs(sigset_t *set); +void siginit(struct proc *p); +void signotify(struct thread *td); +void sigqueue_delete(struct sigqueue *queue, int sig); +void sigqueue_delete_proc(struct proc *p, int sig); +void sigqueue_flush(struct sigqueue *queue); +void sigqueue_init(struct sigqueue *queue, struct proc *p); +void sigqueue_take(ksiginfo_t *ksi); +void tdksignal(struct thread *td, int sig, ksiginfo_t *ksi); +int tdsendsignal(struct proc *p, struct thread *td, int sig, + ksiginfo_t *ksi); +void tdsigcleanup(struct thread *td); +void tdsignal(struct thread *td, int sig); +void trapsignal(struct thread *td, ksiginfo_t *ksi); + +#endif /* _KERNEL */ +#else /* __rtems__ */ +typedef int ksiginfo_t; +#endif /* __rtems__ */ + +#endif /* !_SYS_SIGNALVAR_H_ */ |