[7f72217e] | 1 | /* |
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[eb5a7e07] | 2 | * $Id$ |
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[5e9b32b] | 3 | */ |
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| 4 | |
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[e72d995a] | 5 | #include <assert.h> |
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| 6 | #include <errno.h> |
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[ea1a5bef] | 7 | #include <pthread.h> |
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[5e9b32b] | 8 | #include <signal.h> |
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| 9 | |
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[f4719d5a] | 10 | #include <rtems/system.h> |
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[fdec30b] | 11 | #include <rtems/score/isr.h> |
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[5e9b32b] | 12 | #include <rtems/score/thread.h> |
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[2291b71] | 13 | #include <rtems/score/tqdata.h> |
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[c53cfd0f] | 14 | #include <rtems/score/wkspace.h> |
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[895efd9] | 15 | #include <rtems/posix/seterr.h> |
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| 16 | #include <rtems/posix/threadsup.h> |
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[20fff72] | 17 | #include <rtems/posix/psignal.h> |
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[fdec30b] | 18 | #include <rtems/posix/pthread.h> |
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[2291b71] | 19 | #include <rtems/posix/time.h> |
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[82f490f] | 20 | #include <stdio.h> |
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| 21 | |
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| 22 | |
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| 23 | /* |
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| 24 | * Currently 32 signals numbered 1-32 are defined |
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| 25 | */ |
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| 26 | |
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| 27 | #define SIGNAL_EMPTY_MASK 0x00000000 |
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| 28 | #define SIGNAL_ALL_MASK 0xffffffff |
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| 29 | |
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| 30 | #define signo_to_mask( _sig ) (1 << ((_sig) - 1)) |
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| 31 | |
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| 32 | #define is_valid_signo( _sig ) \ |
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| 33 | ((_sig) >= 1 && (_sig) <= 32 ) |
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[5e9b32b] | 34 | |
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[895efd9] | 35 | /*** PROCESS WIDE STUFF ****/ |
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| 36 | |
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[fdec30b] | 37 | sigset_t _POSIX_signals_Pending; |
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| 38 | |
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[da41ecbc] | 39 | void _POSIX_signals_Abnormal_termination_handler( int signo ) |
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[82f490f] | 40 | { |
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| 41 | exit( 1 ); |
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| 42 | } |
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[ea1a5bef] | 43 | |
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[82f490f] | 44 | #define SIG_ARRAY_MAX (SIGRTMAX + 1) |
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[fdec30b] | 45 | struct sigaction _POSIX_signals_Default_vectors[ SIG_ARRAY_MAX ] = { |
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| 46 | /* NO SIGNAL 0 */ SIGACTION_IGNORE, |
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[adae080a] | 47 | /* SIGHUP 1 */ SIGACTION_TERMINATE, |
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| 48 | /* SIGINT 2 */ SIGACTION_TERMINATE, |
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| 49 | /* SIGQUIT 3 */ SIGACTION_TERMINATE, |
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| 50 | /* SIGILL 4 */ SIGACTION_TERMINATE, |
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| 51 | /* SIGTRAP 5 */ SIGACTION_TERMINATE, |
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| 52 | /* SIGIOT 6 */ SIGACTION_TERMINATE, |
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| 53 | /* SIGABRT 6 SIGACTION_TERMINATE, -- alias for SIGIOT */ |
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| 54 | /* SIGEMT 7 */ SIGACTION_TERMINATE, |
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| 55 | /* SIGFPE 8 */ SIGACTION_TERMINATE, |
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| 56 | /* SIGKILL 9 */ SIGACTION_TERMINATE, |
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| 57 | /* SIGBUS 10 */ SIGACTION_TERMINATE, |
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| 58 | /* SIGSEGV 11 */ SIGACTION_TERMINATE, |
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| 59 | /* SIGSYS 12 */ SIGACTION_TERMINATE, |
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| 60 | /* SIGPIPE 13 */ SIGACTION_TERMINATE, |
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| 61 | /* SIGALRM 14 */ SIGACTION_TERMINATE, |
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| 62 | /* SIGTERM 15 */ SIGACTION_TERMINATE, |
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| 63 | /* SIGUSR1 16 */ SIGACTION_TERMINATE, |
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| 64 | /* SIGUSR2 17 */ SIGACTION_TERMINATE, |
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[82f490f] | 65 | /* SIGRTMIN 18 */ SIGACTION_IGNORE, |
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| 66 | /* SIGRT 19 */ SIGACTION_IGNORE, |
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| 67 | /* SIGRT 20 */ SIGACTION_IGNORE, |
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| 68 | /* SIGRT 21 */ SIGACTION_IGNORE, |
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| 69 | /* SIGRT 22 */ SIGACTION_IGNORE, |
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| 70 | /* SIGRT 23 */ SIGACTION_IGNORE, |
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| 71 | /* SIGRT 24 */ SIGACTION_IGNORE, |
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| 72 | /* SIGRT 25 */ SIGACTION_IGNORE, |
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| 73 | /* SIGRT 26 */ SIGACTION_IGNORE, |
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| 74 | /* SIGRT 27 */ SIGACTION_IGNORE, |
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| 75 | /* SIGRT 28 */ SIGACTION_IGNORE, |
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| 76 | /* SIGRT 29 */ SIGACTION_IGNORE, |
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| 77 | /* SIGRT 30 */ SIGACTION_IGNORE, |
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| 78 | /* SIGRT 31 */ SIGACTION_IGNORE, |
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| 79 | /* SIGRTMAX 32 */ SIGACTION_IGNORE |
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[fdec30b] | 80 | }; |
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| 81 | |
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[82f490f] | 82 | struct sigaction _POSIX_signals_Vectors[ SIG_ARRAY_MAX ]; |
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| 83 | |
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| 84 | Watchdog_Control _POSIX_signals_Alarm_timer; |
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| 85 | |
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| 86 | Thread_queue_Control _POSIX_signals_Wait_queue; |
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| 87 | |
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| 88 | Chain_Control _POSIX_signals_Inactive_siginfo; |
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| 89 | Chain_Control _POSIX_signals_Siginfo[ SIG_ARRAY_MAX ]; |
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| 90 | |
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[fdec30b] | 91 | /*PAGE |
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| 92 | * |
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[82f490f] | 93 | * XXX - move these |
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[2291b71] | 94 | */ |
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| 95 | |
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[82f490f] | 96 | #define _States_Is_interruptible_signal( _states ) \ |
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| 97 | ( ((_states) & \ |
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| 98 | (STATES_WAITING_FOR_SIGNAL|STATES_INTERRUPTIBLE_BY_SIGNAL)) == \ |
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| 99 | (STATES_WAITING_FOR_SIGNAL|STATES_INTERRUPTIBLE_BY_SIGNAL)) |
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[2291b71] | 100 | |
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| 101 | /*PAGE |
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| 102 | * |
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| 103 | * _POSIX_signals_Unblock_thread |
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| 104 | */ |
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| 105 | |
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| 106 | /* XXX this routine could probably be cleaned up */ |
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[c53cfd0f] | 107 | boolean _POSIX_signals_Unblock_thread( |
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[2291b71] | 108 | Thread_Control *the_thread, |
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| 109 | int signo, |
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| 110 | siginfo_t *info |
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| 111 | ) |
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| 112 | { |
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| 113 | POSIX_API_Control *api; |
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| 114 | sigset_t mask; |
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| 115 | siginfo_t *the_info = NULL; |
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| 116 | |
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| 117 | api = the_thread->API_Extensions[ THREAD_API_POSIX ]; |
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| 118 | |
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| 119 | mask = signo_to_mask( signo ); |
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| 120 | |
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| 121 | /* |
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| 122 | * Is the thread is specifically waiting for a signal? |
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| 123 | */ |
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| 124 | |
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| 125 | if ( _States_Is_interruptible_signal( the_thread->current_state ) ) { |
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| 126 | |
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| 127 | if ( (the_thread->Wait.option & mask) || (~api->signals_blocked & mask) ) { |
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| 128 | the_thread->Wait.return_code = EINTR; |
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| 129 | |
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[9e28da4] | 130 | the_info = (siginfo_t *) the_thread->Wait.return_argument; |
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[2291b71] | 131 | |
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| 132 | if ( !info ) { |
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| 133 | the_info->si_signo = signo; |
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| 134 | the_info->si_code = SI_USER; |
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| 135 | the_info->si_value.sival_int = 0; |
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| 136 | } else { |
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| 137 | *the_info = *info; |
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| 138 | } |
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| 139 | |
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| 140 | _Thread_queue_Extract_with_proxy( the_thread ); |
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[c53cfd0f] | 141 | return TRUE; |
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[2291b71] | 142 | } |
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[c53cfd0f] | 143 | |
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| 144 | /* |
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| 145 | * This should only be reached via pthread_kill(). |
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| 146 | */ |
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| 147 | |
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| 148 | return FALSE; |
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[2291b71] | 149 | } |
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| 150 | |
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| 151 | if ( ~api->signals_blocked & mask ) { |
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| 152 | the_thread->do_post_task_switch_extension = TRUE; |
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| 153 | |
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| 154 | if ( the_thread->current_state & STATES_INTERRUPTIBLE_BY_SIGNAL ) { |
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| 155 | the_thread->Wait.return_code = EINTR; |
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| 156 | if ( _States_Is_waiting_on_thread_queue(the_thread->current_state) ) |
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| 157 | _Thread_queue_Extract_with_proxy( the_thread ); |
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| 158 | else if ( _States_Is_delaying(the_thread->current_state)){ |
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| 159 | if ( _Watchdog_Is_active( &the_thread->Timer ) ) |
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| 160 | (void) _Watchdog_Remove( &the_thread->Timer ); |
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| 161 | _Thread_Unblock( the_thread ); |
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| 162 | } |
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| 163 | } |
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| 164 | } |
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[c53cfd0f] | 165 | return FALSE; |
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[2291b71] | 166 | |
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| 167 | } |
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| 168 | |
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[b85649c4] | 169 | /*PAGE |
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| 170 | * |
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| 171 | * _POSIX_signals_Set_process_signals |
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| 172 | */ |
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| 173 | |
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| 174 | void _POSIX_signals_Set_process_signals( |
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| 175 | sigset_t mask |
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| 176 | ) |
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| 177 | { |
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| 178 | ISR_Level level; |
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| 179 | |
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| 180 | _ISR_Disable( level ); |
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| 181 | if ( !_POSIX_signals_Pending ) |
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| 182 | _Thread_Do_post_task_switch_extension++; |
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| 183 | _POSIX_signals_Pending |= mask; |
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| 184 | _ISR_Enable( level ); |
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| 185 | } |
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| 186 | |
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| 187 | /*PAGE |
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| 188 | * |
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| 189 | * _POSIX_signals_Clear_process_signals |
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| 190 | */ |
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| 191 | |
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| 192 | void _POSIX_signals_Clear_process_signals( |
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| 193 | sigset_t mask |
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| 194 | ) |
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| 195 | { |
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| 196 | ISR_Level level; |
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| 197 | |
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| 198 | _ISR_Disable( level ); |
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| 199 | _POSIX_signals_Pending &= ~mask; |
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[82f490f] | 200 | if ( !_POSIX_signals_Pending ) |
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[b85649c4] | 201 | _Thread_Do_post_task_switch_extension--; |
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| 202 | _ISR_Enable( level ); |
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| 203 | } |
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| 204 | |
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[2291b71] | 205 | /*PAGE |
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| 206 | * |
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[adae080a] | 207 | * _POSIX_signals_Clear_signals |
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[fdec30b] | 208 | */ |
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[adae080a] | 209 | |
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| 210 | boolean _POSIX_signals_Clear_signals( |
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[fdec30b] | 211 | POSIX_API_Control *api, |
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| 212 | int signo, |
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[adae080a] | 213 | siginfo_t *info, |
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| 214 | boolean is_global, |
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| 215 | boolean check_blocked |
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[fdec30b] | 216 | ) |
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| 217 | { |
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[c53cfd0f] | 218 | sigset_t mask; |
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[567ac45] | 219 | sigset_t signals_blocked; |
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[c53cfd0f] | 220 | ISR_Level level; |
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| 221 | boolean do_callout; |
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| 222 | POSIX_signals_Siginfo_node *psiginfo; |
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[adae080a] | 223 | |
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[fdec30b] | 224 | mask = signo_to_mask( signo ); |
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[adae080a] | 225 | |
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[fdec30b] | 226 | do_callout = FALSE; |
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[adae080a] | 227 | |
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[567ac45] | 228 | /* set blocked signals based on if checking for them, SIGNAL_ALL_MASK |
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| 229 | * insures that no signals are blocked and all are checked. |
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| 230 | */ |
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| 231 | |
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| 232 | if ( check_blocked ) |
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| 233 | signals_blocked = ~api->signals_blocked; |
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| 234 | else |
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| 235 | signals_blocked = SIGNAL_ALL_MASK; |
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| 236 | |
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[ea1a5bef] | 237 | /* XXX this is not right for siginfo type signals yet */ |
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| 238 | /* XXX since they can't be cleared the same way */ |
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[adae080a] | 239 | |
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[fdec30b] | 240 | _ISR_Disable( level ); |
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| 241 | if ( is_global ) { |
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[567ac45] | 242 | if ( mask & (_POSIX_signals_Pending & signals_blocked) ) { |
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[c53cfd0f] | 243 | if ( _POSIX_signals_Vectors[ signo ].sa_flags == SA_SIGINFO ) { |
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| 244 | psiginfo = (POSIX_signals_Siginfo_node *) |
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| 245 | _Chain_Get_unprotected( &_POSIX_signals_Siginfo[ signo ] ); |
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| 246 | if ( _Chain_Is_empty( &_POSIX_signals_Siginfo[ signo ] ) ) |
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| 247 | _POSIX_signals_Clear_process_signals( mask ); |
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| 248 | if ( psiginfo ) { |
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[adae080a] | 249 | *info = psiginfo->Info; |
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[c53cfd0f] | 250 | _Chain_Append_unprotected( |
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| 251 | &_POSIX_signals_Inactive_siginfo, |
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| 252 | &psiginfo->Node |
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| 253 | ); |
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| 254 | } else |
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| 255 | do_callout = FALSE; |
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| 256 | } else |
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| 257 | _POSIX_signals_Clear_process_signals( mask ); |
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[ea1a5bef] | 258 | do_callout = TRUE; |
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| 259 | } |
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[fdec30b] | 260 | } else { |
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[567ac45] | 261 | if ( mask & (api->signals_pending & signals_blocked) ) { |
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[fdec30b] | 262 | api->signals_pending &= ~mask; |
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| 263 | do_callout = TRUE; |
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| 264 | } |
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| 265 | } |
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| 266 | _ISR_Enable( level ); |
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[adae080a] | 267 | return do_callout; |
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| 268 | } |
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| 269 | |
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[fdec30b] | 270 | |
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[adae080a] | 271 | /*PAGE |
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| 272 | * |
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| 273 | * _POSIX_signals_Check_signal |
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| 274 | */ |
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| 275 | |
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| 276 | boolean _POSIX_signals_Check_signal( |
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| 277 | POSIX_API_Control *api, |
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| 278 | int signo, |
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| 279 | boolean is_global |
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| 280 | ) |
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| 281 | { |
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| 282 | siginfo_t siginfo_struct; |
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| 283 | sigset_t saved_signals_blocked; |
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| 284 | |
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| 285 | if ( ! _POSIX_signals_Clear_signals( api, signo, &siginfo_struct, |
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| 286 | is_global, TRUE ) ) |
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[fdec30b] | 287 | return FALSE; |
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[98ed15e] | 288 | |
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| 289 | /* |
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| 290 | * Since we made a union of these, only one test is necessary but this is |
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| 291 | * safer. |
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| 292 | */ |
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| 293 | |
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| 294 | assert( _POSIX_signals_Vectors[ signo ].sa_handler || |
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| 295 | _POSIX_signals_Vectors[ signo ].sa_sigaction ); |
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[fdec30b] | 296 | |
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[c8f5ab5] | 297 | /* |
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| 298 | * Just to prevent sending a signal which is currently being ignored. |
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| 299 | */ |
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| 300 | |
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| 301 | if ( _POSIX_signals_Vectors[ signo ].sa_handler == SIG_IGN ) |
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| 302 | return FALSE; |
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| 303 | |
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| 304 | /* |
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| 305 | * Block the signals requested in sa_mask |
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| 306 | */ |
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| 307 | |
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| 308 | saved_signals_blocked = api->signals_blocked; |
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| 309 | api->signals_blocked |= _POSIX_signals_Vectors[ signo ].sa_mask; |
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| 310 | |
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[82f490f] | 311 | /* Here, the signal handler function executes */ |
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| 312 | |
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[fdec30b] | 313 | switch ( _POSIX_signals_Vectors[ signo ].sa_flags ) { |
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| 314 | case SA_SIGINFO: |
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[82f490f] | 315 | /* |
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| 316 | * |
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| 317 | * assert( is_global ); |
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| 318 | */ |
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[fdec30b] | 319 | (*_POSIX_signals_Vectors[ signo ].sa_sigaction)( |
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| 320 | signo, |
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[c53cfd0f] | 321 | &siginfo_struct, |
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[fdec30b] | 322 | NULL /* context is undefined per 1003.1b-1993, p. 66 */ |
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| 323 | ); |
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| 324 | break; |
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| 325 | default: |
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| 326 | (*_POSIX_signals_Vectors[ signo ].sa_handler)( signo ); |
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| 327 | break; |
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| 328 | } |
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[c8f5ab5] | 329 | |
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| 330 | /* |
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| 331 | * Restore the previous set of blocked signals |
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| 332 | */ |
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| 333 | |
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| 334 | api->signals_blocked = saved_signals_blocked; |
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| 335 | |
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[fdec30b] | 336 | return TRUE; |
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| 337 | } |
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| 338 | |
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[98ed15e] | 339 | void _POSIX_signals_Post_switch_extension( |
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[fdec30b] | 340 | Thread_Control *the_thread |
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| 341 | ) |
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| 342 | { |
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| 343 | POSIX_API_Control *api; |
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| 344 | int signo; |
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[c8f5ab5] | 345 | ISR_Level level; |
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[fdec30b] | 346 | |
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| 347 | api = the_thread->API_Extensions[ THREAD_API_POSIX ]; |
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| 348 | |
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| 349 | /* |
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| 350 | * If we invoke any user code, there is the possibility that |
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[c8f5ab5] | 351 | * a new signal has been posted that we should process so we |
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| 352 | * restart the loop if a signal handler was invoked. |
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| 353 | * |
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| 354 | * The first thing done is to check there are any signals to be |
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| 355 | * processed at all. No point in doing this loop otherwise. |
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[fdec30b] | 356 | */ |
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| 357 | |
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| 358 | restart: |
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[c8f5ab5] | 359 | _ISR_Disable( level ); |
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| 360 | if ( !(~api->signals_blocked & |
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[b85649c4] | 361 | (api->signals_pending | _POSIX_signals_Pending)) ) { |
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| 362 | _ISR_Enable( level ); |
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| 363 | return; |
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| 364 | } |
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[9e28da4] | 365 | _ISR_Enable( level ); |
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[c8f5ab5] | 366 | |
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[fdec30b] | 367 | for ( signo = SIGRTMIN ; signo <= SIGRTMAX ; signo++ ) { |
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| 368 | |
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| 369 | if ( _POSIX_signals_Check_signal( api, signo, FALSE ) ) |
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| 370 | goto restart; |
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| 371 | |
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| 372 | if ( _POSIX_signals_Check_signal( api, signo, TRUE ) ) |
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| 373 | goto restart; |
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| 374 | |
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| 375 | } |
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| 376 | |
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[567ac45] | 377 | /* XXX - add __SIGFIRSTNOTRT or something like that to newlib siginfo.h */ |
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| 378 | |
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| 379 | for ( signo = SIGHUP ; signo <= __SIGLASTNOTRT ; signo++ ) { |
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[fdec30b] | 380 | |
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| 381 | if ( _POSIX_signals_Check_signal( api, signo, FALSE ) ) |
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| 382 | goto restart; |
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| 383 | |
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| 384 | if ( _POSIX_signals_Check_signal( api, signo, TRUE ) ) |
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| 385 | goto restart; |
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| 386 | |
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| 387 | } |
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| 388 | |
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| 389 | } |
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| 390 | |
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| 391 | /*PAGE |
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| 392 | * |
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| 393 | * _POSIX_signals_Alarm_TSR |
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| 394 | */ |
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| 395 | |
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| 396 | void _POSIX_signals_Alarm_TSR( |
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| 397 | Objects_Id id, |
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| 398 | void *argument |
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| 399 | ) |
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| 400 | { |
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[b85649c4] | 401 | int status; |
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| 402 | |
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| 403 | status = kill( getpid(), SIGALRM ); |
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| 404 | /* XXX can't print from an ISR, should this be fatal? */ |
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| 405 | assert( !status ); |
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[fdec30b] | 406 | } |
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[895efd9] | 407 | |
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| 408 | /*PAGE |
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[5e9b32b] | 409 | * |
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[895efd9] | 410 | * _POSIX_signals_Manager_Initialization |
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[5e9b32b] | 411 | */ |
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| 412 | |
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[c53cfd0f] | 413 | void _POSIX_signals_Manager_Initialization( |
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| 414 | int maximum_queued_signals |
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| 415 | ) |
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[5e9b32b] | 416 | { |
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[fdec30b] | 417 | unsigned32 signo; |
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| 418 | |
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| 419 | /* |
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| 420 | * Insure we have the same number of vectors and default vector entries |
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| 421 | */ |
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| 422 | |
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| 423 | assert( |
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| 424 | sizeof(_POSIX_signals_Vectors) == sizeof(_POSIX_signals_Default_vectors) |
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| 425 | ); |
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| 426 | |
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| 427 | memcpy( |
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| 428 | _POSIX_signals_Vectors, |
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| 429 | _POSIX_signals_Default_vectors, |
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| 430 | sizeof( _POSIX_signals_Vectors ) |
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| 431 | ); |
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| 432 | |
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| 433 | /* |
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| 434 | * Initialize the set of pending signals for the entire process |
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| 435 | */ |
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| 436 | |
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| 437 | sigemptyset( &_POSIX_signals_Pending ); |
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| 438 | |
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| 439 | /* |
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| 440 | * Initialize the timer used to implement alarm(). |
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| 441 | */ |
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| 442 | |
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| 443 | _Watchdog_Initialize( |
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| 444 | &_POSIX_signals_Alarm_timer, |
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| 445 | _POSIX_signals_Alarm_TSR, |
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| 446 | 0, |
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| 447 | NULL |
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| 448 | ); |
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| 449 | |
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[2291b71] | 450 | /* |
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| 451 | * Initialize the queue we use to block for signals |
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| 452 | */ |
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| 453 | |
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| 454 | _Thread_queue_Initialize( |
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| 455 | &_POSIX_signals_Wait_queue, |
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| 456 | OBJECTS_NO_CLASS, |
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| 457 | THREAD_QUEUE_DISCIPLINE_PRIORITY, |
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| 458 | STATES_WAITING_FOR_SIGNAL | STATES_INTERRUPTIBLE_BY_SIGNAL, |
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| 459 | NULL, |
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| 460 | EAGAIN |
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| 461 | ); |
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| 462 | |
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| 463 | /* XXX status codes */ |
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[c53cfd0f] | 464 | |
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[fdec30b] | 465 | /* |
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[c53cfd0f] | 466 | * Allocate the siginfo pools. |
---|
[fdec30b] | 467 | */ |
---|
| 468 | |
---|
| 469 | for ( signo=1 ; signo<= SIGRTMAX ; signo++ ) |
---|
| 470 | _Chain_Initialize_empty( &_POSIX_signals_Siginfo[ signo ] ); |
---|
| 471 | |
---|
[c53cfd0f] | 472 | _Chain_Initialize( |
---|
| 473 | &_POSIX_signals_Inactive_siginfo, |
---|
| 474 | _Workspace_Allocate_or_fatal_error( |
---|
| 475 | maximum_queued_signals * sizeof( POSIX_signals_Siginfo_node ) |
---|
| 476 | ), |
---|
| 477 | maximum_queued_signals, |
---|
| 478 | sizeof( POSIX_signals_Siginfo_node ) |
---|
| 479 | ); |
---|
[5e9b32b] | 480 | } |
---|
[82f490f] | 481 | |
---|
| 482 | /* |
---|
| 483 | * 3.3.3 Manipulate Signal Sets, P1003.1b-1993, p. 69 |
---|
| 484 | */ |
---|
| 485 | |
---|
| 486 | int sigemptyset( |
---|
| 487 | sigset_t *set |
---|
| 488 | ) |
---|
| 489 | { |
---|
| 490 | if ( !set ) |
---|
| 491 | set_errno_and_return_minus_one( EINVAL ); |
---|
| 492 | |
---|
| 493 | *set = 0; |
---|
| 494 | return 0; |
---|
| 495 | } |
---|
| 496 | |
---|
| 497 | /* |
---|
| 498 | * 3.3.3 Manipulate Signal Sets, P1003.1b-1993, p. 69 |
---|
| 499 | */ |
---|
| 500 | |
---|
| 501 | int sigfillset( |
---|
| 502 | sigset_t *set |
---|
| 503 | ) |
---|
| 504 | { |
---|
| 505 | if ( !set ) |
---|
| 506 | set_errno_and_return_minus_one( EINVAL ); |
---|
| 507 | |
---|
| 508 | *set = SIGNAL_ALL_MASK; |
---|
| 509 | return 0; |
---|
| 510 | } |
---|
| 511 | |
---|
| 512 | /* |
---|
| 513 | * 3.3.3 Manipulate Signal Sets, P1003.1b-1993, p. 69 |
---|
| 514 | */ |
---|
| 515 | |
---|
| 516 | int sigaddset( |
---|
| 517 | sigset_t *set, |
---|
| 518 | int signo |
---|
| 519 | ) |
---|
| 520 | { |
---|
| 521 | if ( !set ) |
---|
| 522 | set_errno_and_return_minus_one( EINVAL ); |
---|
| 523 | |
---|
| 524 | if ( !signo ) |
---|
| 525 | return 0; |
---|
| 526 | |
---|
| 527 | if ( !is_valid_signo(signo) ) |
---|
| 528 | set_errno_and_return_minus_one( EINVAL ); |
---|
| 529 | |
---|
| 530 | *set |= signo_to_mask(signo); |
---|
| 531 | return 0; |
---|
| 532 | } |
---|
| 533 | |
---|
| 534 | /* |
---|
| 535 | * 3.3.3 Manipulate Signal Sets, P1003.1b-1993, p. 69 |
---|
| 536 | */ |
---|
| 537 | |
---|
| 538 | int sigdelset( |
---|
| 539 | sigset_t *set, |
---|
| 540 | int signo |
---|
| 541 | ) |
---|
| 542 | { |
---|
| 543 | if ( !set ) |
---|
| 544 | set_errno_and_return_minus_one( EINVAL ); |
---|
| 545 | |
---|
| 546 | if ( !signo ) |
---|
| 547 | return 0; |
---|
| 548 | |
---|
| 549 | if ( !is_valid_signo(signo) ) |
---|
| 550 | set_errno_and_return_minus_one( EINVAL ); |
---|
| 551 | |
---|
| 552 | *set &= ~signo_to_mask(signo); |
---|
| 553 | return 0; |
---|
| 554 | } |
---|
| 555 | |
---|
| 556 | /* |
---|
| 557 | * 3.3.3 Manipulate Signal Sets, P1003.1b-1993, p. 69 |
---|
| 558 | */ |
---|
| 559 | |
---|
| 560 | int sigismember( |
---|
| 561 | const sigset_t *set, |
---|
| 562 | int signo |
---|
| 563 | ) |
---|
| 564 | { |
---|
| 565 | if ( !set ) |
---|
| 566 | set_errno_and_return_minus_one( EINVAL ); |
---|
| 567 | |
---|
| 568 | if ( !signo ) |
---|
| 569 | return 0; |
---|
| 570 | |
---|
| 571 | if ( !is_valid_signo(signo) ) |
---|
| 572 | set_errno_and_return_minus_one( EINVAL ); |
---|
| 573 | |
---|
| 574 | if ( *set & signo_to_mask(signo) ) |
---|
| 575 | return 1; |
---|
| 576 | |
---|
| 577 | return 0; |
---|
| 578 | } |
---|
| 579 | |
---|
| 580 | /* |
---|
| 581 | * 3.3.4 Examine and Change Signal Action, P1003.1b-1993, p. 70 |
---|
| 582 | */ |
---|
| 583 | |
---|
| 584 | /* *************************************************************************** |
---|
| 585 | * The signal handler is notified to the timers manager when the |
---|
| 586 | * timer is set. So, the timers manager knows the signal handler. |
---|
| 587 | * ***************************************************************************/ |
---|
| 588 | |
---|
| 589 | int sigaction( |
---|
| 590 | int sig, |
---|
| 591 | const struct sigaction *act, |
---|
| 592 | struct sigaction *oact |
---|
| 593 | ) |
---|
| 594 | { |
---|
| 595 | ISR_Level level; |
---|
| 596 | |
---|
| 597 | |
---|
| 598 | if ( oact ) |
---|
| 599 | *oact = _POSIX_signals_Vectors[ sig ]; |
---|
| 600 | |
---|
| 601 | if ( !sig ) |
---|
| 602 | return 0; |
---|
| 603 | |
---|
| 604 | if ( !is_valid_signo(sig) ) |
---|
| 605 | set_errno_and_return_minus_one( EINVAL ); |
---|
| 606 | |
---|
| 607 | /* |
---|
| 608 | * Some signals cannot be ignored (P1003.1b-1993, pp. 70-72 and references. |
---|
| 609 | * |
---|
| 610 | * NOTE: Solaris documentation claims to "silently enforce" this which |
---|
| 611 | * contradicts the POSIX specification. |
---|
| 612 | */ |
---|
| 613 | |
---|
| 614 | if ( sig == SIGKILL ) |
---|
| 615 | set_errno_and_return_minus_one( EINVAL ); |
---|
| 616 | |
---|
| 617 | /* |
---|
| 618 | * Evaluate the new action structure and set the global signal vector |
---|
| 619 | * appropriately. |
---|
| 620 | */ |
---|
| 621 | |
---|
| 622 | if ( act ) { |
---|
| 623 | |
---|
| 624 | /* |
---|
| 625 | * Unless the user is installing the default signal actions, then |
---|
| 626 | * we can just copy the provided sigaction structure into the vectors. |
---|
| 627 | */ |
---|
| 628 | |
---|
| 629 | _ISR_Disable( level ); |
---|
| 630 | if ( act->sa_handler == SIG_DFL ) { |
---|
| 631 | _POSIX_signals_Vectors[ sig ] = _POSIX_signals_Default_vectors[ sig ]; |
---|
| 632 | } else { |
---|
| 633 | _POSIX_signals_Clear_process_signals( signo_to_mask(sig) ); |
---|
| 634 | _POSIX_signals_Vectors[ sig ] = *act; |
---|
| 635 | } |
---|
| 636 | _ISR_Enable( level ); |
---|
| 637 | } |
---|
| 638 | |
---|
| 639 | /* |
---|
| 640 | * No need to evaluate or dispatch because: |
---|
| 641 | * |
---|
| 642 | * + If we were ignoring the signal before, none could be pending |
---|
| 643 | * now (signals not posted when SIG_IGN). |
---|
| 644 | * + If we are now ignoring a signal that was previously pending, |
---|
| 645 | * we clear the pending signal indicator. |
---|
| 646 | */ |
---|
| 647 | |
---|
| 648 | return 0; |
---|
| 649 | } |
---|
| 650 | |
---|
| 651 | /* |
---|
| 652 | * 3.3.5 Examine and Change Blocked Signals, P1003.1b-1993, p. 73 |
---|
| 653 | * |
---|
| 654 | * NOTE: P1003.1c/D10, p. 37 adds pthread_sigmask(). |
---|
| 655 | * |
---|
| 656 | */ |
---|
| 657 | |
---|
| 658 | int sigprocmask( |
---|
| 659 | int how, |
---|
| 660 | const sigset_t *set, |
---|
| 661 | sigset_t *oset |
---|
| 662 | ) |
---|
| 663 | { |
---|
| 664 | /* |
---|
| 665 | * P1003.1c/Draft 10, p. 38 maps sigprocmask to pthread_sigmask. |
---|
| 666 | */ |
---|
| 667 | |
---|
| 668 | return pthread_sigmask( how, set, oset ); |
---|
| 669 | } |
---|
| 670 | |
---|
| 671 | /* |
---|
| 672 | * 3.3.5 Examine and Change Blocked Signals, P1003.1b-1993, p. 73 |
---|
| 673 | * |
---|
| 674 | * NOTE: P1003.1c/D10, p. 37 adds pthread_sigmask(). |
---|
| 675 | */ |
---|
| 676 | |
---|
| 677 | int pthread_sigmask( |
---|
| 678 | int how, |
---|
| 679 | const sigset_t *set, |
---|
| 680 | sigset_t *oset |
---|
| 681 | ) |
---|
| 682 | { |
---|
| 683 | POSIX_API_Control *api; |
---|
| 684 | |
---|
| 685 | if ( !set && !oset ) |
---|
| 686 | set_errno_and_return_minus_one( EINVAL ); |
---|
| 687 | |
---|
| 688 | api = _Thread_Executing->API_Extensions[ THREAD_API_POSIX ]; |
---|
| 689 | |
---|
| 690 | if ( oset ) |
---|
| 691 | *oset = api->signals_blocked; |
---|
| 692 | |
---|
| 693 | if ( !set ) |
---|
| 694 | return 0; |
---|
| 695 | |
---|
| 696 | switch ( how ) { |
---|
| 697 | case SIG_BLOCK: |
---|
| 698 | api->signals_blocked |= *set; |
---|
| 699 | break; |
---|
| 700 | case SIG_UNBLOCK: |
---|
| 701 | api->signals_blocked &= ~*set; |
---|
| 702 | break; |
---|
| 703 | case SIG_SETMASK: |
---|
| 704 | api->signals_blocked = *set; |
---|
| 705 | break; |
---|
| 706 | default: |
---|
| 707 | set_errno_and_return_minus_one( EINVAL ); |
---|
| 708 | } |
---|
| 709 | |
---|
| 710 | /* XXX are there critical section problems here? */ |
---|
| 711 | |
---|
| 712 | /* XXX evaluate the new set */ |
---|
| 713 | |
---|
| 714 | if ( ~api->signals_blocked & |
---|
| 715 | (api->signals_pending | _POSIX_signals_Pending) ) { |
---|
| 716 | _Thread_Executing->do_post_task_switch_extension = TRUE; |
---|
| 717 | _Thread_Dispatch(); |
---|
| 718 | } |
---|
| 719 | |
---|
| 720 | return 0; |
---|
| 721 | } |
---|
| 722 | |
---|
| 723 | /* |
---|
| 724 | * 3.3.6 Examine Pending Signals, P1003.1b-1993, p. 75 |
---|
| 725 | */ |
---|
| 726 | |
---|
| 727 | int sigpending( |
---|
| 728 | sigset_t *set |
---|
| 729 | ) |
---|
| 730 | { |
---|
| 731 | POSIX_API_Control *api; |
---|
| 732 | |
---|
| 733 | if ( !set ) |
---|
| 734 | set_errno_and_return_minus_one( EINVAL ); |
---|
| 735 | |
---|
| 736 | api = _Thread_Executing->API_Extensions[ THREAD_API_POSIX ]; |
---|
| 737 | |
---|
| 738 | *set = api->signals_pending | _POSIX_signals_Pending; |
---|
| 739 | |
---|
| 740 | return 0; |
---|
| 741 | } |
---|
| 742 | |
---|
| 743 | /* |
---|
| 744 | * 3.3.7 Wait for a Signal, P1003.1b-1993, p. 75 |
---|
| 745 | */ |
---|
| 746 | |
---|
| 747 | int sigsuspend( |
---|
| 748 | const sigset_t *sigmask |
---|
| 749 | ) |
---|
| 750 | { |
---|
| 751 | sigset_t saved_signals_blocked; |
---|
| 752 | sigset_t all_signals; |
---|
| 753 | int status; |
---|
| 754 | POSIX_API_Control *api; |
---|
| 755 | |
---|
| 756 | api = _Thread_Executing->API_Extensions[ THREAD_API_POSIX ]; |
---|
| 757 | |
---|
| 758 | status = sigprocmask( SIG_BLOCK, sigmask, &saved_signals_blocked ); |
---|
| 759 | |
---|
| 760 | (void) sigfillset( &all_signals ); |
---|
| 761 | |
---|
| 762 | status = sigtimedwait( &all_signals, NULL, NULL ); |
---|
| 763 | |
---|
| 764 | (void) sigprocmask( SIG_SETMASK, &saved_signals_blocked, NULL ); |
---|
| 765 | |
---|
| 766 | return status; |
---|
| 767 | } |
---|
| 768 | |
---|
| 769 | /* |
---|
| 770 | * 3.3.8 Synchronously Accept a Signal, P1003.1b-1993, p. 76 |
---|
| 771 | * |
---|
| 772 | * NOTE: P1003.1c/D10, p. 39 adds sigwait(). |
---|
| 773 | */ |
---|
| 774 | |
---|
| 775 | int sigwaitinfo( |
---|
| 776 | const sigset_t *set, |
---|
| 777 | siginfo_t *info |
---|
| 778 | ) |
---|
| 779 | { |
---|
| 780 | return sigtimedwait( set, info, NULL ); |
---|
| 781 | } |
---|
| 782 | |
---|
| 783 | /* |
---|
| 784 | * 3.3.8 Synchronously Accept a Signal, P1003.1b-1993, p. 76 |
---|
| 785 | * |
---|
| 786 | * NOTE: P1003.1c/D10, p. 39 adds sigwait(). |
---|
| 787 | */ |
---|
| 788 | |
---|
| 789 | int _POSIX_signals_Get_highest( |
---|
| 790 | sigset_t set |
---|
| 791 | ) |
---|
| 792 | { |
---|
| 793 | int signo; |
---|
| 794 | |
---|
| 795 | for ( signo = SIGRTMIN ; signo <= SIGRTMAX ; signo++ ) { |
---|
| 796 | if ( set & signo_to_mask( signo ) ) |
---|
| 797 | return signo; |
---|
| 798 | } |
---|
| 799 | |
---|
| 800 | /* XXX - add __SIGFIRSTNOTRT or something like that to newlib siginfo.h */ |
---|
| 801 | |
---|
| 802 | for ( signo = SIGHUP ; signo <= __SIGLASTNOTRT ; signo++ ) { |
---|
| 803 | if ( set & signo_to_mask( signo ) ) |
---|
| 804 | return signo; |
---|
| 805 | } |
---|
| 806 | |
---|
| 807 | return 0; |
---|
| 808 | } |
---|
| 809 | |
---|
| 810 | int sigtimedwait( |
---|
| 811 | const sigset_t *set, |
---|
| 812 | siginfo_t *info, |
---|
| 813 | const struct timespec *timeout |
---|
| 814 | ) |
---|
| 815 | { |
---|
| 816 | Thread_Control *the_thread; |
---|
| 817 | POSIX_API_Control *api; |
---|
| 818 | Watchdog_Interval interval; |
---|
| 819 | siginfo_t signal_information; |
---|
| 820 | siginfo_t *the_info; |
---|
| 821 | int signo; |
---|
| 822 | |
---|
| 823 | the_info = ( info ) ? info : &signal_information; |
---|
| 824 | |
---|
| 825 | the_thread = _Thread_Executing; |
---|
| 826 | |
---|
| 827 | api = the_thread->API_Extensions[ THREAD_API_POSIX ]; |
---|
| 828 | |
---|
| 829 | /* |
---|
| 830 | * What if they are already pending? |
---|
| 831 | */ |
---|
| 832 | |
---|
| 833 | /* API signals pending? */ |
---|
| 834 | |
---|
| 835 | if ( *set & api->signals_pending ) { |
---|
| 836 | /* XXX real info later */ |
---|
| 837 | the_info->si_signo = _POSIX_signals_Get_highest( api->signals_pending ); |
---|
| 838 | _POSIX_signals_Clear_signals( api, the_info->si_signo, the_info, |
---|
| 839 | FALSE, FALSE ); |
---|
| 840 | the_info->si_code = SI_USER; |
---|
| 841 | the_info->si_value.sival_int = 0; |
---|
| 842 | return the_info->si_signo; |
---|
| 843 | } |
---|
| 844 | |
---|
| 845 | /* Process pending signals? */ |
---|
| 846 | |
---|
| 847 | if ( *set & _POSIX_signals_Pending) { |
---|
| 848 | signo = _POSIX_signals_Get_highest( _POSIX_signals_Pending ); |
---|
| 849 | _POSIX_signals_Clear_signals( api, signo, the_info, TRUE, FALSE ); |
---|
| 850 | |
---|
| 851 | if ( !info ) { |
---|
| 852 | the_info->si_signo = signo; |
---|
| 853 | the_info->si_code = SI_USER; |
---|
| 854 | the_info->si_value.sival_int = 0; |
---|
| 855 | } |
---|
| 856 | } |
---|
| 857 | |
---|
| 858 | interval = 0; |
---|
| 859 | if ( timeout ) { |
---|
| 860 | |
---|
| 861 | if (timeout->tv_nsec < 0 || timeout->tv_nsec >= TOD_NANOSECONDS_PER_SECOND) |
---|
| 862 | set_errno_and_return_minus_one( EINVAL ); |
---|
| 863 | |
---|
| 864 | interval = _POSIX_Timespec_to_interval( timeout ); |
---|
| 865 | } |
---|
| 866 | |
---|
| 867 | the_info->si_signo = -1; |
---|
| 868 | |
---|
| 869 | _Thread_Disable_dispatch(); |
---|
| 870 | the_thread->Wait.queue = &_POSIX_signals_Wait_queue; |
---|
| 871 | the_thread->Wait.return_code = EINTR; |
---|
| 872 | the_thread->Wait.option = *set; |
---|
| 873 | the_thread->Wait.return_argument = (void *) the_info; |
---|
| 874 | _Thread_queue_Enter_critical_section( &_POSIX_signals_Wait_queue ); |
---|
| 875 | _Thread_queue_Enqueue( &_POSIX_signals_Wait_queue, interval ); |
---|
| 876 | _Thread_Enable_dispatch(); |
---|
| 877 | |
---|
| 878 | /* |
---|
| 879 | * When the thread set free by a signal, it is needed to eliminate |
---|
| 880 | * that signal |
---|
| 881 | */ |
---|
| 882 | |
---|
| 883 | _POSIX_signals_Clear_signals( api, the_info->si_signo, the_info, |
---|
| 884 | FALSE, FALSE ); |
---|
| 885 | |
---|
| 886 | errno = _Thread_Executing->Wait.return_code; |
---|
| 887 | return the_info->si_signo; |
---|
| 888 | } |
---|
| 889 | |
---|
| 890 | /* |
---|
| 891 | * 3.3.8 Synchronously Accept a Signal, P1003.1b-1993, p. 76 |
---|
| 892 | * |
---|
| 893 | * NOTE: P1003.1c/D10, p. 39 adds sigwait(). |
---|
| 894 | */ |
---|
| 895 | |
---|
| 896 | int sigwait( |
---|
| 897 | const sigset_t *set, |
---|
| 898 | int *sig |
---|
| 899 | ) |
---|
| 900 | { |
---|
| 901 | int status; |
---|
| 902 | |
---|
| 903 | status = sigtimedwait( set, NULL, NULL ); |
---|
| 904 | |
---|
| 905 | if ( status != -1 ) { |
---|
| 906 | if ( sig ) |
---|
| 907 | *sig = status; |
---|
| 908 | return 0; |
---|
| 909 | } |
---|
| 910 | |
---|
| 911 | return errno; |
---|
| 912 | } |
---|
| 913 | |
---|
| 914 | /* |
---|
| 915 | * 3.3.9 Queue a Signal to a Process, P1003.1b-1993, p. 78 |
---|
| 916 | */ |
---|
| 917 | |
---|
| 918 | int sigqueue( |
---|
| 919 | pid_t pid, |
---|
| 920 | int signo, |
---|
| 921 | const union sigval value |
---|
| 922 | ) |
---|
| 923 | { |
---|
| 924 | return killinfo( pid, signo, &value ); |
---|
| 925 | } |
---|
| 926 | |
---|
| 927 | /* |
---|
| 928 | * 3.3.10 Send a Signal to a Thread, P1003.1c/D10, p. 43 |
---|
| 929 | */ |
---|
| 930 | |
---|
| 931 | int pthread_kill( |
---|
| 932 | pthread_t thread, |
---|
| 933 | int sig |
---|
| 934 | ) |
---|
| 935 | { |
---|
| 936 | POSIX_API_Control *api; |
---|
| 937 | Thread_Control *the_thread; |
---|
| 938 | Objects_Locations location; |
---|
| 939 | |
---|
| 940 | if ( sig && !is_valid_signo(sig) ) |
---|
| 941 | set_errno_and_return_minus_one( EINVAL ); |
---|
| 942 | /* |
---|
| 943 | if ( _POSIX_signals_Vectors[ sig ].sa_flags == SA_SIGINFO ) |
---|
| 944 | set_errno_and_return_minus_one( ENOSYS ); |
---|
| 945 | */ |
---|
| 946 | /* |
---|
| 947 | * RTEMS does not support sending a siginfo signal to a specific thread. |
---|
| 948 | */ |
---|
| 949 | |
---|
| 950 | the_thread = _POSIX_Threads_Get( thread, &location ); |
---|
| 951 | switch ( location ) { |
---|
| 952 | case OBJECTS_ERROR: |
---|
| 953 | case OBJECTS_REMOTE: |
---|
| 954 | set_errno_and_return_minus_one( ESRCH ); |
---|
| 955 | case OBJECTS_LOCAL: |
---|
| 956 | /* |
---|
| 957 | * If sig == 0 then just validate arguments |
---|
| 958 | */ |
---|
| 959 | |
---|
| 960 | api = the_thread->API_Extensions[ THREAD_API_POSIX ]; |
---|
| 961 | |
---|
| 962 | if ( sig ) { |
---|
| 963 | |
---|
| 964 | if ( _POSIX_signals_Vectors[ sig ].sa_handler == SIG_IGN ) { |
---|
| 965 | _Thread_Enable_dispatch(); |
---|
| 966 | return 0; |
---|
| 967 | } |
---|
| 968 | |
---|
| 969 | /* XXX critical section */ |
---|
| 970 | |
---|
| 971 | api->signals_pending |= signo_to_mask( sig ); |
---|
| 972 | |
---|
| 973 | (void) _POSIX_signals_Unblock_thread( the_thread, sig, NULL ); |
---|
| 974 | |
---|
| 975 | the_thread->do_post_task_switch_extension = TRUE; |
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| 976 | |
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| 977 | if ( _ISR_Is_in_progress() && _Thread_Is_executing( the_thread ) ) |
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| 978 | _ISR_Signals_to_thread_executing = TRUE; |
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| 979 | } |
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| 980 | _Thread_Enable_dispatch(); |
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| 981 | return 0; |
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| 982 | } |
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| 983 | |
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| 984 | return POSIX_BOTTOM_REACHED(); |
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| 985 | } |
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