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[/] [or1k/] [trunk/] [rtems/] [c/] [src/] [exec/] [posix/] [src/] [psignal.c] - Blame information for rev 1765

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/*
 *  $Id: psignal.c,v 1.2 2001-09-27 11:59:17 chris Exp $
 */
 
#include <assert.h>
#include <errno.h>
#include <pthread.h>
#include <signal.h>
 
#include <rtems/system.h>
#include <rtems/score/isr.h>
#include <rtems/score/thread.h>
#include <rtems/score/tqdata.h>
#include <rtems/score/wkspace.h>
#include <rtems/posix/seterr.h>
#include <rtems/posix/threadsup.h>
#include <rtems/posix/psignal.h>
#include <rtems/posix/pthread.h>
#include <rtems/posix/time.h>
#include <stdio.h>
 
 
/*
 *  Currently 32 signals numbered 1-32 are defined
 */
 
#define SIGNAL_EMPTY_MASK  0x00000000
#define SIGNAL_ALL_MASK    0xffffffff
 
#define signo_to_mask( _sig ) (1 << ((_sig) - 1))
 
#define is_valid_signo( _sig ) \
  ((_sig) >= 1 && (_sig) <= 32 )
 
/*** PROCESS WIDE STUFF ****/
 
sigset_t  _POSIX_signals_Pending;
 
void _POSIX_signals_Abnormal_termination_handler( int signo )
{
  exit( 1 );
}
 
#define SIG_ARRAY_MAX  (SIGRTMAX + 1)
struct sigaction _POSIX_signals_Default_vectors[ SIG_ARRAY_MAX ] = {
  /* NO SIGNAL 0 */  SIGACTION_IGNORE,
  /* SIGHUP    1 */  SIGACTION_TERMINATE,
  /* SIGINT    2 */  SIGACTION_TERMINATE,
  /* SIGQUIT   3 */  SIGACTION_TERMINATE,
  /* SIGILL    4 */  SIGACTION_TERMINATE,
  /* SIGTRAP   5 */  SIGACTION_TERMINATE,
  /* SIGIOT    6 */  SIGACTION_TERMINATE,
  /* SIGABRT   6     SIGACTION_TERMINATE, -- alias for SIGIOT */
  /* SIGEMT    7 */  SIGACTION_TERMINATE,
  /* SIGFPE    8 */  SIGACTION_TERMINATE,
  /* SIGKILL   9 */  SIGACTION_TERMINATE,
  /* SIGBUS   10 */  SIGACTION_TERMINATE,
  /* SIGSEGV  11 */  SIGACTION_TERMINATE,
  /* SIGSYS   12 */  SIGACTION_TERMINATE,
  /* SIGPIPE  13 */  SIGACTION_TERMINATE,
  /* SIGALRM  14 */  SIGACTION_TERMINATE,
  /* SIGTERM  15 */  SIGACTION_TERMINATE,
  /* SIGUSR1  16 */  SIGACTION_TERMINATE,
  /* SIGUSR2  17 */  SIGACTION_TERMINATE,
  /* SIGRTMIN 18 */  SIGACTION_TERMINATE,
  /* SIGRT    19 */  SIGACTION_TERMINATE,
  /* SIGRT    20 */  SIGACTION_TERMINATE,
  /* SIGRT    21 */  SIGACTION_TERMINATE,
  /* SIGRT    22 */  SIGACTION_TERMINATE,
  /* SIGRT    23 */  SIGACTION_TERMINATE,
  /* SIGRT    24 */  SIGACTION_TERMINATE,
  /* SIGRT    25 */  SIGACTION_TERMINATE,
  /* SIGRT    26 */  SIGACTION_TERMINATE,
  /* SIGRT    27 */  SIGACTION_TERMINATE,
  /* SIGRT    28 */  SIGACTION_TERMINATE,
  /* SIGRT    29 */  SIGACTION_TERMINATE,
  /* SIGRT    30 */  SIGACTION_TERMINATE,
  /* SIGRT    31 */  SIGACTION_TERMINATE,
  /* SIGRTMAX 32 */  SIGACTION_TERMINATE
};
 
struct sigaction _POSIX_signals_Vectors[ SIG_ARRAY_MAX ];
 
Watchdog_Control _POSIX_signals_Alarm_timer;
 
Thread_queue_Control _POSIX_signals_Wait_queue;
 
Chain_Control _POSIX_signals_Inactive_siginfo;
Chain_Control _POSIX_signals_Siginfo[ SIG_ARRAY_MAX ];
 
/*PAGE
 *
 *  XXX - move these
 */
 
#define _States_Is_interruptible_signal( _states ) \
  ( ((_states) & \
    (STATES_WAITING_FOR_SIGNAL|STATES_INTERRUPTIBLE_BY_SIGNAL)) == \
      (STATES_WAITING_FOR_SIGNAL|STATES_INTERRUPTIBLE_BY_SIGNAL))
 
/*
 *  _POSIX_signals_Post_switch_extension
 */
 
void _POSIX_signals_Post_switch_extension(
  Thread_Control  *the_thread
)
{
  POSIX_API_Control  *api;
  int                 signo;
  ISR_Level           level;
 
  api = the_thread->API_Extensions[ THREAD_API_POSIX ];
 
  /*
   *  If we invoke any user code, there is the possibility that
   *  a new signal has been posted that we should process so we
   *  restart the loop if a signal handler was invoked.
   *
   *  The first thing done is to check there are any signals to be
   *  processed at all.  No point in doing this loop otherwise.
   */
 
restart:
  _ISR_Disable( level );
    if ( !(~api->signals_blocked &
          (api->signals_pending | _POSIX_signals_Pending)) ) {
     _ISR_Enable( level );
     return;
   }
  _ISR_Enable( level );
 
  for ( signo = SIGRTMIN ; signo <= SIGRTMAX ; signo++ ) {
 
    if ( _POSIX_signals_Check_signal( api, signo, FALSE ) )
      goto restart;
 
    if ( _POSIX_signals_Check_signal( api, signo, TRUE ) )
      goto restart;
 
  }
 
/* XXX - add __SIGFIRSTNOTRT or something like that to newlib siginfo.h */
 
  for ( signo = SIGHUP ; signo <= __SIGLASTNOTRT ; signo++ ) {
 
    if ( _POSIX_signals_Check_signal( api, signo, FALSE ) )
      goto restart;
 
    if ( _POSIX_signals_Check_signal( api, signo, TRUE ) )
      goto restart;
 
  }
 
}
 
/*PAGE
 *
 *  _POSIX_signals_Alarm_TSR
 */
 
void _POSIX_signals_Alarm_TSR(
  Objects_Id      id,
  void           *argument
)
{
  int status;
 
  status = kill( getpid(), SIGALRM );
  /* XXX can't print from an ISR, should this be fatal? */
  assert( !status );
}
 
/*PAGE
 *
 *  _POSIX_signals_Manager_Initialization
 */
 
void _POSIX_signals_Manager_Initialization(
  int  maximum_queued_signals
)
{
  unsigned32 signo;
 
  /*
   *  Insure we have the same number of vectors and default vector entries
   */
 
  assert(
   sizeof(_POSIX_signals_Vectors) == sizeof(_POSIX_signals_Default_vectors)
  );
 
  memcpy(
    _POSIX_signals_Vectors,
    _POSIX_signals_Default_vectors,
    sizeof( _POSIX_signals_Vectors )
  );
 
  /*
   *  Initialize the set of pending signals for the entire process
   */
 
  sigemptyset( &_POSIX_signals_Pending );
 
  /*
   *  Initialize the timer used to implement alarm().
   */
 
  _Watchdog_Initialize(
    &_POSIX_signals_Alarm_timer,
    _POSIX_signals_Alarm_TSR,
    0,
    NULL
  );
 
  /*
   *  Initialize the queue we use to block for signals
   */
 
  _Thread_queue_Initialize(
    &_POSIX_signals_Wait_queue,
    OBJECTS_NO_CLASS,
    THREAD_QUEUE_DISCIPLINE_PRIORITY,
    STATES_WAITING_FOR_SIGNAL | STATES_INTERRUPTIBLE_BY_SIGNAL,
    NULL,
    EAGAIN
  );
 
  /* XXX status codes */
 
  /*
   *  Allocate the siginfo pools.
   */
 
  for ( signo=1 ; signo<= SIGRTMAX ; signo++ )
    _Chain_Initialize_empty( &_POSIX_signals_Siginfo[ signo ] );
 
  _Chain_Initialize(
    &_POSIX_signals_Inactive_siginfo,
    _Workspace_Allocate_or_fatal_error(
      maximum_queued_signals * sizeof( POSIX_signals_Siginfo_node )
    ),
    maximum_queued_signals,
    sizeof( POSIX_signals_Siginfo_node )
  );
}

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[/] [or1k/] [trunk/] [rtems/] [c/] [src/] [exec/] [posix/] [src/] [psignal.c] - Blame information for rev 1765

Line No.	Rev	Author	Line
1	158	chris	`/*`
2	208	chris	`* $Id: psignal.c,v 1.2 2001-09-27 11:59:17 chris Exp $`
3	158	chris	`*/`
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
37			`sigset_t _POSIX_signals_Pending;`
38
39			`void _POSIX_signals_Abnormal_termination_handler( int signo )`
40			`{`
41			`exit( 1 );`
42			`}`
43
44			`#define SIG_ARRAY_MAX (SIGRTMAX + 1)`
45			`struct 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
82			`struct sigaction _POSIX_signals_Vectors[ SIG_ARRAY_MAX ];`
83
84			`Watchdog_Control _POSIX_signals_Alarm_timer;`
85
86			`Thread_queue_Control _POSIX_signals_Wait_queue;`
87
88			`Chain_Control _POSIX_signals_Inactive_siginfo;`
89			`Chain_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
105			`void _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
124			`restart:`
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
162			`void _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
179			`void _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			`}`