Lines Matching refs:sig
63 static void __user *sig_handler(struct task_struct *t, int sig) in sig_handler() argument
65 return t->sighand->action[sig - 1].sa.sa_handler; in sig_handler()
68 static inline bool sig_handler_ignored(void __user *handler, int sig) in sig_handler_ignored() argument
72 (handler == SIG_DFL && sig_kernel_ignore(sig)); in sig_handler_ignored()
75 static bool sig_task_ignored(struct task_struct *t, int sig, bool force) in sig_task_ignored() argument
79 handler = sig_handler(t, sig); in sig_task_ignored()
82 handler == SIG_DFL && !(force && sig_kernel_only(sig))) in sig_task_ignored()
85 return sig_handler_ignored(handler, sig); in sig_task_ignored()
88 static bool sig_ignored(struct task_struct *t, int sig, bool force) in sig_ignored() argument
95 if (sigismember(&t->blocked, sig) || sigismember(&t->real_blocked, sig)) in sig_ignored()
103 if (t->ptrace && sig != SIGKILL) in sig_ignored()
106 return sig_task_ignored(t, sig, force); in sig_ignored()
121 ready |= signal->sig[i] &~ blocked->sig[i]; in has_pending_signals()
124 case 4: ready = signal->sig[3] &~ blocked->sig[3]; in has_pending_signals()
125 ready |= signal->sig[2] &~ blocked->sig[2]; in has_pending_signals()
126 ready |= signal->sig[1] &~ blocked->sig[1]; in has_pending_signals()
127 ready |= signal->sig[0] &~ blocked->sig[0]; in has_pending_signals()
130 case 2: ready = signal->sig[1] &~ blocked->sig[1]; in has_pending_signals()
131 ready |= signal->sig[0] &~ blocked->sig[0]; in has_pending_signals()
134 case 1: ready = signal->sig[0] &~ blocked->sig[0]; in has_pending_signals()
196 int sig = 0; in next_signal() local
198 s = pending->signal.sig; in next_signal()
199 m = mask->sig; in next_signal()
209 sig = ffz(~x) + 1; in next_signal()
210 return sig; in next_signal()
219 sig = ffz(~x) + i*_NSIG_BPW + 1; in next_signal()
228 sig = ffz(~x) + _NSIG_BPW + 1; in next_signal()
236 return sig; in next_signal()
239 static inline void print_dropped_signal(int sig) in print_dropped_signal() argument
250 current->comm, current->pid, sig); in print_dropped_signal()
353 struct signal_struct *sig = task->signal; in task_participate_group_stop() local
363 if (!WARN_ON_ONCE(sig->group_stop_count == 0)) in task_participate_group_stop()
364 sig->group_stop_count--; in task_participate_group_stop()
370 if (!sig->group_stop_count && !(sig->flags & SIGNAL_STOP_STOPPED)) { in task_participate_group_stop()
371 signal_set_stop_flags(sig, SIGNAL_STOP_STOPPED); in task_participate_group_stop()
382 struct signal_struct *sig = current->signal; in task_join_group_stop() local
386 sig->group_stop_count++; in task_join_group_stop()
397 __sigqueue_alloc(int sig, struct task_struct *t, gfp_t flags, int override_rlimit) in __sigqueue_alloc() argument
416 print_dropped_signal(sig); in __sigqueue_alloc()
476 int sig = q->info.si_signo; in __flush_itimer_signals() local
479 sigaddset(&retain, sig); in __flush_itimer_signals()
481 sigdelset(&signal, sig); in __flush_itimer_signals()
533 bool unhandled_signal(struct task_struct *tsk, int sig) in unhandled_signal() argument
535 void __user *handler = tsk->sighand->action[sig-1].sa.sa_handler; in unhandled_signal()
546 static void collect_signal(int sig, struct sigpending *list, siginfo_t *info, in collect_signal() argument
556 if (q->info.si_signo == sig) { in collect_signal()
563 sigdelset(&list->signal, sig); in collect_signal()
583 info->si_signo = sig; in collect_signal()
594 int sig = next_signal(pending, mask); in __dequeue_signal() local
596 if (sig) in __dequeue_signal()
597 collect_signal(sig, pending, info, resched_timer); in __dequeue_signal()
598 return sig; in __dequeue_signal()
763 static int check_kill_permission(int sig, struct siginfo *info, in check_kill_permission() argument
769 if (!valid_signal(sig)) in check_kill_permission()
775 error = audit_signal_info(sig, t); /* Let audit system see the signal */ in check_kill_permission()
781 switch (sig) { in check_kill_permission()
795 return security_task_kill(t, info, sig, NULL); in check_kill_permission()
834 static bool prepare_signal(int sig, struct task_struct *p, bool force) in prepare_signal() argument
842 return sig == SIGKILL; in prepare_signal()
846 } else if (sig_kernel_stop(sig)) { in prepare_signal()
854 } else if (sig == SIGCONT) { in prepare_signal()
896 return !sig_ignored(p, sig, force); in prepare_signal()
907 static inline bool wants_signal(int sig, struct task_struct *p) in wants_signal() argument
909 if (sigismember(&p->blocked, sig)) in wants_signal()
915 if (sig == SIGKILL) in wants_signal()
924 static void complete_signal(int sig, struct task_struct *p, enum pid_type type) in complete_signal() argument
935 if (wants_signal(sig, p)) in complete_signal()
948 while (!wants_signal(sig, t)) { in complete_signal()
965 if (sig_fatal(p, sig) && in complete_signal()
967 !sigismember(&t->real_blocked, sig) && in complete_signal()
968 (sig == SIGKILL || !p->ptrace)) { in complete_signal()
972 if (!sig_kernel_coredump(sig)) { in complete_signal()
980 signal->group_exit_code = sig; in complete_signal()
996 signal_wake_up(t, sig == SIGKILL); in complete_signal()
1000 static inline bool legacy_queue(struct sigpending *signals, int sig) in legacy_queue() argument
1002 return (sig < SIGRTMIN) && sigismember(&signals->signal, sig); in legacy_queue()
1026 static int __send_signal(int sig, struct siginfo *info, struct task_struct *t, in __send_signal() argument
1037 if (!prepare_signal(sig, t, in __send_signal()
1048 if (legacy_queue(pending, sig)) in __send_signal()
1068 if (sig < SIGRTMIN) in __send_signal()
1073 q = __sigqueue_alloc(sig, t, GFP_ATOMIC, override_rlimit); in __send_signal()
1079 q->info.si_signo = sig; in __send_signal()
1088 q->info.si_signo = sig; in __send_signal()
1104 if (sig >= SIGRTMIN && info->si_code != SI_USER) { in __send_signal()
1123 signalfd_notify(t, sig); in __send_signal()
1124 sigaddset(&pending->signal, sig); in __send_signal()
1132 if (sig == SIGCONT) in __send_signal()
1134 else if (sig_kernel_stop(sig)) in __send_signal()
1136 sigaddset(signal, sig); in __send_signal()
1140 complete_signal(sig, t, type); in __send_signal()
1142 trace_signal_generate(sig, info, t, type != PIDTYPE_PID, result); in __send_signal()
1146 static int send_signal(int sig, struct siginfo *info, struct task_struct *t, in send_signal() argument
1156 return __send_signal(sig, info, t, type, from_ancestor_ns); in send_signal()
1193 __group_send_sig_info(int sig, struct siginfo *info, struct task_struct *p) in __group_send_sig_info() argument
1195 return send_signal(sig, info, p, PIDTYPE_TGID); in __group_send_sig_info()
1199 specific_send_sig_info(int sig, struct siginfo *info, struct task_struct *t) in specific_send_sig_info() argument
1201 return send_signal(sig, info, t, PIDTYPE_PID); in specific_send_sig_info()
1204 int do_send_sig_info(int sig, struct siginfo *info, struct task_struct *p, in do_send_sig_info() argument
1211 ret = send_signal(sig, info, p, type); in do_send_sig_info()
1230 force_sig_info(int sig, struct siginfo *info, struct task_struct *t) in force_sig_info() argument
1237 action = &t->sighand->action[sig-1]; in force_sig_info()
1239 blocked = sigismember(&t->blocked, sig); in force_sig_info()
1243 sigdelset(&t->blocked, sig); in force_sig_info()
1253 ret = specific_send_sig_info(sig, info, t); in force_sig_info()
1318 int group_send_sig_info(int sig, struct siginfo *info, struct task_struct *p, in group_send_sig_info() argument
1324 ret = check_kill_permission(sig, info, p); in group_send_sig_info()
1327 if (!ret && sig) in group_send_sig_info()
1328 ret = do_send_sig_info(sig, info, p, type); in group_send_sig_info()
1338 int __kill_pgrp_info(int sig, struct siginfo *info, struct pid *pgrp) in __kill_pgrp_info() argument
1346 int err = group_send_sig_info(sig, info, p, PIDTYPE_PGID); in __kill_pgrp_info()
1353 int kill_pid_info(int sig, struct siginfo *info, struct pid *pid) in kill_pid_info() argument
1362 error = group_send_sig_info(sig, info, p, PIDTYPE_TGID); in kill_pid_info()
1375 static int kill_proc_info(int sig, struct siginfo *info, pid_t pid) in kill_proc_info() argument
1379 error = kill_pid_info(sig, info, find_vpid(pid)); in kill_proc_info()
1396 int kill_pid_info_as_cred(int sig, struct siginfo *info, struct pid *pid, in kill_pid_info_as_cred() argument
1403 if (!valid_signal(sig)) in kill_pid_info_as_cred()
1416 ret = security_task_kill(p, info, sig, cred); in kill_pid_info_as_cred()
1420 if (sig) { in kill_pid_info_as_cred()
1422 ret = __send_signal(sig, info, p, PIDTYPE_TGID, 0); in kill_pid_info_as_cred()
1440 static int kill_something_info(int sig, struct siginfo *info, pid_t pid) in kill_something_info() argument
1446 ret = kill_pid_info(sig, info, find_vpid(pid)); in kill_something_info()
1457 ret = __kill_pgrp_info(sig, info, in kill_something_info()
1466 int err = group_send_sig_info(sig, info, p, in kill_something_info()
1484 int send_sig_info(int sig, struct siginfo *info, struct task_struct *p) in send_sig_info() argument
1490 if (!valid_signal(sig)) in send_sig_info()
1493 return do_send_sig_info(sig, info, p, PIDTYPE_PID); in send_sig_info()
1500 send_sig(int sig, struct task_struct *p, int priv) in send_sig() argument
1502 return send_sig_info(sig, __si_special(priv), p); in send_sig()
1505 void force_sig(int sig, struct task_struct *p) in force_sig() argument
1507 force_sig_info(sig, SEND_SIG_PRIV, p); in force_sig()
1516 void force_sigsegv(int sig, struct task_struct *p) in force_sigsegv() argument
1518 if (sig == SIGSEGV) { in force_sigsegv()
1521 p->sighand->action[sig - 1].sa.sa_handler = SIG_DFL; in force_sigsegv()
1527 int force_sig_fault(int sig, int code, void __user *addr in force_sig_fault() argument
1535 info.si_signo = sig; in force_sig_fault()
1550 int send_sig_fault(int sig, int code, void __user *addr in send_sig_fault() argument
1558 info.si_signo = sig; in send_sig_fault()
1646 int kill_pgrp(struct pid *pid, int sig, int priv) in kill_pgrp() argument
1651 ret = __kill_pgrp_info(sig, __si_special(priv), pid); in kill_pgrp()
1658 int kill_pid(struct pid *pid, int sig, int priv) in kill_pid() argument
1660 return kill_pid_info(sig, __si_special(priv), pid); in kill_pid()
1710 int sig = q->info.si_signo; in send_sigqueue() local
1726 if (!prepare_signal(sig, t, false)) in send_sigqueue()
1742 signalfd_notify(t, sig); in send_sigqueue()
1745 sigaddset(&pending->signal, sig); in send_sigqueue()
1746 complete_signal(sig, t, type); in send_sigqueue()
1749 trace_signal_generate(sig, &q->info, t, type != PIDTYPE_PID, result); in send_sigqueue()
1763 bool do_notify_parent(struct task_struct *tsk, int sig) in do_notify_parent() argument
1771 BUG_ON(sig == -1); in do_notify_parent()
1779 if (sig != SIGCHLD) { in do_notify_parent()
1785 sig = SIGCHLD; in do_notify_parent()
1789 info.si_signo = sig; in do_notify_parent()
1824 if (!tsk->ptrace && sig == SIGCHLD && in do_notify_parent()
1844 sig = 0; in do_notify_parent()
1846 if (valid_signal(sig) && sig) in do_notify_parent()
1847 __group_send_sig_info(sig, &info, tsk->parent); in do_notify_parent()
2155 struct signal_struct *sig = current->signal; in do_signal_stop() local
2165 unlikely(signal_group_exit(sig))) in do_signal_stop()
2186 if (!(sig->flags & SIGNAL_STOP_STOPPED)) in do_signal_stop()
2187 sig->group_exit_code = signr; in do_signal_stop()
2189 sig->group_stop_count = 0; in do_signal_stop()
2192 sig->group_stop_count++; in do_signal_stop()
2203 sig->group_stop_count++; in do_signal_stop()
2518 ksig->sig = signr; in get_signal()
2519 return ksig->sig > 0; in get_signal()
2544 sigaddset(&blocked, ksig->sig); in signal_delivered()
2552 force_sigsegv(ksig->sig, current); in signal_setup_done()
2850 enum siginfo_layout siginfo_layout(int sig, int si_code) in siginfo_layout() argument
2869 if ((sig < ARRAY_SIZE(filter)) && (si_code <= filter[sig].limit)) { in siginfo_layout()
2870 layout = filter[sig].layout; in siginfo_layout()
2872 if ((sig == SIGBUS) && in siginfo_layout()
2875 else if ((sig == SIGSEGV) && (si_code == SEGV_BNDERR)) in siginfo_layout()
2878 else if ((sig == SIGSEGV) && (si_code == SEGV_PKUERR)) in siginfo_layout()
3090 int sig, ret = 0; in do_sigtimedwait() local
3106 sig = dequeue_signal(tsk, &mask, info); in do_sigtimedwait()
3107 if (!sig && timeout) { in do_sigtimedwait()
3125 sig = dequeue_signal(tsk, &mask, info); in do_sigtimedwait()
3129 if (sig) in do_sigtimedwait()
3130 return sig; in do_sigtimedwait()
3210 SYSCALL_DEFINE2(kill, pid_t, pid, int, sig) in SYSCALL_DEFINE2() argument
3215 info.si_signo = sig; in SYSCALL_DEFINE2()
3221 return kill_something_info(sig, &info, pid); in SYSCALL_DEFINE2()
3225 do_send_specific(pid_t tgid, pid_t pid, int sig, struct siginfo *info) in do_send_specific() argument
3233 error = check_kill_permission(sig, info, p); in do_send_specific()
3238 if (!error && sig) { in do_send_specific()
3239 error = do_send_sig_info(sig, info, p, PIDTYPE_PID); in do_send_specific()
3254 static int do_tkill(pid_t tgid, pid_t pid, int sig) in do_tkill() argument
3259 info.si_signo = sig; in do_tkill()
3265 return do_send_specific(tgid, pid, sig, &info); in do_tkill()
3278 SYSCALL_DEFINE3(tgkill, pid_t, tgid, pid_t, pid, int, sig) in SYSCALL_DEFINE3() argument
3284 return do_tkill(tgid, pid, sig); in SYSCALL_DEFINE3()
3294 SYSCALL_DEFINE2(tkill, pid_t, pid, int, sig) in SYSCALL_DEFINE2() argument
3300 return do_tkill(0, pid, sig); in SYSCALL_DEFINE2()
3303 static int do_rt_sigqueueinfo(pid_t pid, int sig, siginfo_t *info) in do_rt_sigqueueinfo() argument
3312 info->si_signo = sig; in do_rt_sigqueueinfo()
3315 return kill_proc_info(sig, info, pid); in do_rt_sigqueueinfo()
3324 SYSCALL_DEFINE3(rt_sigqueueinfo, pid_t, pid, int, sig, in SYSCALL_DEFINE3() argument
3330 return do_rt_sigqueueinfo(pid, sig, &info); in SYSCALL_DEFINE3()
3336 int, sig, in COMPAT_SYSCALL_DEFINE3()
3343 return do_rt_sigqueueinfo(pid, sig, &info); in COMPAT_SYSCALL_DEFINE3()
3347 static int do_rt_tgsigqueueinfo(pid_t tgid, pid_t pid, int sig, siginfo_t *info) in do_rt_tgsigqueueinfo() argument
3360 info->si_signo = sig; in do_rt_tgsigqueueinfo()
3362 return do_send_specific(tgid, pid, sig, info); in do_rt_tgsigqueueinfo()
3365 SYSCALL_DEFINE4(rt_tgsigqueueinfo, pid_t, tgid, pid_t, pid, int, sig, in SYSCALL_DEFINE4() argument
3373 return do_rt_tgsigqueueinfo(tgid, pid, sig, &info); in SYSCALL_DEFINE4()
3380 int, sig, in COMPAT_SYSCALL_DEFINE4()
3387 return do_rt_tgsigqueueinfo(tgid, pid, sig, &info); in COMPAT_SYSCALL_DEFINE4()
3394 void kernel_sigaction(int sig, __sighandler_t action) in kernel_sigaction() argument
3397 current->sighand->action[sig - 1].sa.sa_handler = action; in kernel_sigaction()
3402 sigaddset(&mask, sig); in kernel_sigaction()
3417 int do_sigaction(int sig, struct k_sigaction *act, struct k_sigaction *oact) in do_sigaction() argument
3423 if (!valid_signal(sig) || sig < 1 || (act && sig_kernel_only(sig))) in do_sigaction()
3426 k = &p->sighand->action[sig-1]; in do_sigaction()
3449 if (sig_handler_ignored(sig_handler(p, sig), sig)) { in do_sigaction()
3451 sigaddset(&mask, sig); in do_sigaction()
3627 return put_user(set.sig[0], set32); in COMPAT_SYSCALL_DEFINE1()
3650 old_set = current->blocked.sig[0]; in SYSCALL_DEFINE3()
3666 new_blocked.sig[0] = new_set; in SYSCALL_DEFINE3()
3692 SYSCALL_DEFINE4(rt_sigaction, int, sig, in SYSCALL_DEFINE4() argument
3707 ret = do_sigaction(sig, act ? &new_sa : NULL, oact ? &old_sa : NULL); in SYSCALL_DEFINE4()
3717 COMPAT_SYSCALL_DEFINE4(rt_sigaction, int, sig, in COMPAT_SYSCALL_DEFINE4() argument
3746 ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL); in COMPAT_SYSCALL_DEFINE4()
3764 SYSCALL_DEFINE3(sigaction, int, sig, in SYSCALL_DEFINE3() argument
3785 ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL); in SYSCALL_DEFINE3()
3792 __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask)) in SYSCALL_DEFINE3()
3800 COMPAT_SYSCALL_DEFINE3(sigaction, int, sig, in COMPAT_SYSCALL_DEFINE3() argument
3825 ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL); in COMPAT_SYSCALL_DEFINE3()
3834 __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask)) in COMPAT_SYSCALL_DEFINE3()
3849 return current->blocked.sig[0]; in SYSCALL_DEFINE0()
3854 int old = current->blocked.sig[0]; in SYSCALL_DEFINE1()
3868 SYSCALL_DEFINE2(signal, int, sig, __sighandler_t, handler) in SYSCALL_DEFINE2() argument
3877 ret = do_sigaction(sig, &new_sa, &old_sa); in SYSCALL_DEFINE2()
3983 void kdb_send_sig(struct task_struct *t, int sig) in kdb_send_sig() argument
4005 ret = send_signal(sig, SEND_SIG_PRIV, t, PIDTYPE_PID); in kdb_send_sig()
4009 sig, t->pid); in kdb_send_sig()
4011 kdb_printf("Signal %d is sent to process %d.\n", sig, t->pid); in kdb_send_sig()