source: rtems/cpukit/posix/src/psignal.c @ 811fae1

4.104.114.84.95
Last change on this file since 811fae1 was ee979cd, checked in by Joel Sherrill <joel.sherrill@…>, on 11/02/99 at 17:36:20

Split some more stuff out of psignal.c.

  • Property mode set to 100644
File size: 5.8 KB
Line 
1/*
2 *  $Id$
3 */
4
5#include <assert.h>
6#include <errno.h>
7#include <pthread.h>
8#include <signal.h>
9
10#include <rtems/system.h>
11#include <rtems/score/isr.h>
12#include <rtems/score/thread.h>
13#include <rtems/score/tqdata.h>
14#include <rtems/score/wkspace.h>
15#include <rtems/posix/seterr.h>
16#include <rtems/posix/threadsup.h>
17#include <rtems/posix/psignal.h>
18#include <rtems/posix/pthread.h>
19#include <rtems/posix/time.h>
20#include <stdio.h>
21
22
23/*
24 *  Currently 32 signals numbered 1-32 are defined
25 */
26
27#define SIGNAL_EMPTY_MASK  0x00000000
28#define SIGNAL_ALL_MASK    0xffffffff
29
30#define signo_to_mask( _sig ) (1 << ((_sig) - 1))
31
32#define is_valid_signo( _sig ) \
33  ((_sig) >= 1 && (_sig) <= 32 )
34
35/*** PROCESS WIDE STUFF ****/
36
37sigset_t  _POSIX_signals_Pending;
38
39void _POSIX_signals_Abnormal_termination_handler( int signo )
40{
41  exit( 1 );
42}
43
44#define SIG_ARRAY_MAX  (SIGRTMAX + 1)
45struct sigaction _POSIX_signals_Default_vectors[ SIG_ARRAY_MAX ] = {
46  /* NO SIGNAL 0 */  SIGACTION_IGNORE,
47  /* SIGHUP    1 */  SIGACTION_TERMINATE,
48  /* SIGINT    2 */  SIGACTION_TERMINATE,
49  /* SIGQUIT   3 */  SIGACTION_TERMINATE,
50  /* SIGILL    4 */  SIGACTION_TERMINATE,
51  /* SIGTRAP   5 */  SIGACTION_TERMINATE,
52  /* SIGIOT    6 */  SIGACTION_TERMINATE,
53  /* SIGABRT   6     SIGACTION_TERMINATE, -- alias for SIGIOT */
54  /* SIGEMT    7 */  SIGACTION_TERMINATE,
55  /* SIGFPE    8 */  SIGACTION_TERMINATE,
56  /* SIGKILL   9 */  SIGACTION_TERMINATE,
57  /* SIGBUS   10 */  SIGACTION_TERMINATE,
58  /* SIGSEGV  11 */  SIGACTION_TERMINATE,
59  /* SIGSYS   12 */  SIGACTION_TERMINATE,
60  /* SIGPIPE  13 */  SIGACTION_TERMINATE,
61  /* SIGALRM  14 */  SIGACTION_TERMINATE,
62  /* SIGTERM  15 */  SIGACTION_TERMINATE,
63  /* SIGUSR1  16 */  SIGACTION_TERMINATE,
64  /* SIGUSR2  17 */  SIGACTION_TERMINATE,
65  /* SIGRTMIN 18 */  SIGACTION_TERMINATE,
66  /* SIGRT    19 */  SIGACTION_TERMINATE,
67  /* SIGRT    20 */  SIGACTION_TERMINATE,
68  /* SIGRT    21 */  SIGACTION_TERMINATE,
69  /* SIGRT    22 */  SIGACTION_TERMINATE,
70  /* SIGRT    23 */  SIGACTION_TERMINATE,
71  /* SIGRT    24 */  SIGACTION_TERMINATE,
72  /* SIGRT    25 */  SIGACTION_TERMINATE,
73  /* SIGRT    26 */  SIGACTION_TERMINATE,
74  /* SIGRT    27 */  SIGACTION_TERMINATE,
75  /* SIGRT    28 */  SIGACTION_TERMINATE,
76  /* SIGRT    29 */  SIGACTION_TERMINATE,
77  /* SIGRT    30 */  SIGACTION_TERMINATE,
78  /* SIGRT    31 */  SIGACTION_TERMINATE,
79  /* SIGRTMAX 32 */  SIGACTION_TERMINATE
80};
81
82struct sigaction _POSIX_signals_Vectors[ SIG_ARRAY_MAX ];
83
84Watchdog_Control _POSIX_signals_Alarm_timer;
85
86Thread_queue_Control _POSIX_signals_Wait_queue;
87
88Chain_Control _POSIX_signals_Inactive_siginfo;
89Chain_Control _POSIX_signals_Siginfo[ SIG_ARRAY_MAX ];
90
91/*PAGE
92 *
93 *  XXX - move these
94 */
95
96#define _States_Is_interruptible_signal( _states ) \
97  ( ((_states) & \
98    (STATES_WAITING_FOR_SIGNAL|STATES_INTERRUPTIBLE_BY_SIGNAL)) == \
99      (STATES_WAITING_FOR_SIGNAL|STATES_INTERRUPTIBLE_BY_SIGNAL))
100
101/*
102 *  _POSIX_signals_Post_switch_extension
103 */
104
105void _POSIX_signals_Post_switch_extension(
106  Thread_Control  *the_thread
107)
108{
109  POSIX_API_Control  *api;
110  int                 signo;
111  ISR_Level           level;
112
113  api = the_thread->API_Extensions[ THREAD_API_POSIX ];
114
115  /*
116   *  If we invoke any user code, there is the possibility that
117   *  a new signal has been posted that we should process so we
118   *  restart the loop if a signal handler was invoked.
119   *
120   *  The first thing done is to check there are any signals to be
121   *  processed at all.  No point in doing this loop otherwise.
122   */
123
124restart:
125  _ISR_Disable( level );
126    if ( !(~api->signals_blocked &
127          (api->signals_pending | _POSIX_signals_Pending)) ) {
128     _ISR_Enable( level );
129     return;
130   }
131  _ISR_Enable( level );
132
133  for ( signo = SIGRTMIN ; signo <= SIGRTMAX ; signo++ ) {
134
135    if ( _POSIX_signals_Check_signal( api, signo, FALSE ) )
136      goto restart;
137
138    if ( _POSIX_signals_Check_signal( api, signo, TRUE ) )
139      goto restart;
140
141  }
142
143/* XXX - add __SIGFIRSTNOTRT or something like that to newlib siginfo.h */
144
145  for ( signo = SIGHUP ; signo <= __SIGLASTNOTRT ; signo++ ) {
146
147    if ( _POSIX_signals_Check_signal( api, signo, FALSE ) )
148      goto restart;
149 
150    if ( _POSIX_signals_Check_signal( api, signo, TRUE ) )
151      goto restart;
152
153  }
154
155}
156
157/*PAGE
158 *
159 *  _POSIX_signals_Alarm_TSR
160 */
161 
162void _POSIX_signals_Alarm_TSR(
163  Objects_Id      id,
164  void           *argument
165)
166{
167  int status;
168
169  status = kill( getpid(), SIGALRM );
170  /* XXX can't print from an ISR, should this be fatal? */
171  assert( !status );
172}
173
174/*PAGE
175 *
176 *  _POSIX_signals_Manager_Initialization
177 */
178
179void _POSIX_signals_Manager_Initialization(
180  int  maximum_queued_signals
181)
182{
183  unsigned32 signo;
184
185  /*
186   *  Insure we have the same number of vectors and default vector entries
187   */
188
189  assert(
190   sizeof(_POSIX_signals_Vectors) == sizeof(_POSIX_signals_Default_vectors)
191  );
192
193  memcpy(
194    _POSIX_signals_Vectors,
195    _POSIX_signals_Default_vectors,
196    sizeof( _POSIX_signals_Vectors )
197  );
198 
199  /*
200   *  Initialize the set of pending signals for the entire process
201   */
202
203  sigemptyset( &_POSIX_signals_Pending );
204
205  /*
206   *  Initialize the timer used to implement alarm().
207   */
208
209  _Watchdog_Initialize(
210    &_POSIX_signals_Alarm_timer,
211    _POSIX_signals_Alarm_TSR,
212    0,
213    NULL
214  );
215 
216  /*
217   *  Initialize the queue we use to block for signals
218   */
219 
220  _Thread_queue_Initialize(
221    &_POSIX_signals_Wait_queue,
222    OBJECTS_NO_CLASS,
223    THREAD_QUEUE_DISCIPLINE_PRIORITY,
224    STATES_WAITING_FOR_SIGNAL | STATES_INTERRUPTIBLE_BY_SIGNAL,
225    NULL,
226    EAGAIN
227  );
228
229  /* XXX status codes */
230
231  /*
232   *  Allocate the siginfo pools.
233   */
234
235  for ( signo=1 ; signo<= SIGRTMAX ; signo++ )
236    _Chain_Initialize_empty( &_POSIX_signals_Siginfo[ signo ] );
237
238  _Chain_Initialize(
239    &_POSIX_signals_Inactive_siginfo,
240    _Workspace_Allocate_or_fatal_error(
241      maximum_queued_signals * sizeof( POSIX_signals_Siginfo_node )
242    ),
243    maximum_queued_signals,
244    sizeof( POSIX_signals_Siginfo_node )
245  );
246}
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