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b85e4829 AC |
1 | /* The common simulator framework for GDB, the GNU Debugger. |
2 | ||
e2882c85 | 3 | Copyright 2002-2018 Free Software Foundation, Inc. |
b85e4829 AC |
4 | |
5 | Contributed by Andrew Cagney and Red Hat. | |
6 | ||
7 | This file is part of GDB. | |
8 | ||
9 | This program is free software; you can redistribute it and/or modify | |
10 | it under the terms of the GNU General Public License as published by | |
4744ac1b | 11 | the Free Software Foundation; either version 3 of the License, or |
b85e4829 AC |
12 | (at your option) any later version. |
13 | ||
14 | This program is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
4744ac1b | 20 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c SS |
21 | |
22 | ||
23 | #ifndef _SIM_EVENTS_C_ | |
24 | #define _SIM_EVENTS_C_ | |
25 | ||
26 | #include "sim-main.h" | |
27 | #include "sim-assert.h" | |
e7505490 | 28 | #include "libiberty.h" |
c906108c SS |
29 | |
30 | #ifdef HAVE_STRING_H | |
31 | #include <string.h> | |
32 | #else | |
33 | #ifdef HAVE_STRINGS_H | |
34 | #include <strings.h> | |
35 | #endif | |
36 | #endif | |
37 | ||
38 | #ifdef HAVE_STDLIB_H | |
39 | #include <stdlib.h> | |
40 | #endif | |
41 | ||
6439295f | 42 | #include <signal.h> /* For SIGPROCMASK et al. */ |
c906108c | 43 | |
c906108c SS |
44 | typedef enum { |
45 | watch_invalid, | |
46 | ||
47 | /* core - target byte order */ | |
48 | watch_core_targ_1, | |
49 | watch_core_targ_2, | |
50 | watch_core_targ_4, | |
51 | watch_core_targ_8, | |
52 | /* core - big-endian */ | |
53 | watch_core_be_1, | |
54 | watch_core_be_2, | |
55 | watch_core_be_4, | |
56 | watch_core_be_8, | |
57 | /* core - little-endian */ | |
58 | watch_core_le_1, | |
59 | watch_core_le_2, | |
60 | watch_core_le_4, | |
61 | watch_core_le_8, | |
62 | ||
63 | /* sim - host byte order */ | |
64 | watch_sim_host_1, | |
65 | watch_sim_host_2, | |
66 | watch_sim_host_4, | |
67 | watch_sim_host_8, | |
68 | /* sim - big-endian */ | |
69 | watch_sim_be_1, | |
70 | watch_sim_be_2, | |
71 | watch_sim_be_4, | |
72 | watch_sim_be_8, | |
73 | /* sim - little-endian */ | |
74 | watch_sim_le_1, | |
75 | watch_sim_le_2, | |
76 | watch_sim_le_4, | |
77 | watch_sim_le_8, | |
028f6515 | 78 | |
c906108c SS |
79 | /* wallclock */ |
80 | watch_clock, | |
81 | ||
82 | /* timer */ | |
83 | watch_timer, | |
84 | } sim_event_watchpoints; | |
85 | ||
86 | ||
87 | struct _sim_event { | |
88 | sim_event_watchpoints watching; | |
89 | void *data; | |
90 | sim_event_handler *handler; | |
91 | /* timer event */ | |
92 | signed64 time_of_event; | |
93 | /* watch wallclock event */ | |
94 | unsigned wallclock; | |
95 | /* watch core address */ | |
96 | address_word core_addr; | |
97 | unsigned core_map; | |
98 | /* watch sim addr */ | |
99 | void *host_addr; | |
100 | /* watch core/sim range */ | |
101 | int is_within; /* 0/1 */ | |
102 | unsigned ub; | |
103 | unsigned lb; | |
104 | unsigned64 ub64; | |
105 | unsigned64 lb64; | |
106 | /* trace info (if any) */ | |
107 | char *trace; | |
108 | /* list */ | |
109 | sim_event *next; | |
110 | }; | |
111 | ||
112 | ||
113 | /* The event queue maintains a single absolute time using two | |
114 | variables. | |
028f6515 | 115 | |
c906108c | 116 | TIME_OF_EVENT: this holds the time at which the next event is ment |
6439295f | 117 | to occur. If no next event it will hold the time of the last |
c906108c SS |
118 | event. |
119 | ||
120 | TIME_FROM_EVENT: The current distance from TIME_OF_EVENT. A value | |
121 | <= 0 (except when poll-event is being processed) indicates that | |
122 | event processing is due. This variable is decremented once for | |
123 | each iteration of a clock cycle. | |
124 | ||
125 | Initially, the clock is started at time one (0) with TIME_OF_EVENT | |
126 | == 0 and TIME_FROM_EVENT == 0 and with NR_TICKS_TO_PROCESS == 1. | |
127 | ||
128 | Clearly there is a bug in that this code assumes that the absolute | |
129 | time counter will never become greater than 2^62. | |
130 | ||
131 | To avoid the need to use 64bit arithmetic, the event queue always | |
132 | contains at least one event scheduled every 16 000 ticks. This | |
133 | limits the time from event counter to values less than | |
134 | 16 000. */ | |
135 | ||
136 | ||
137 | #if !defined (SIM_EVENTS_POLL_RATE) | |
138 | #define SIM_EVENTS_POLL_RATE 0x1000 | |
139 | #endif | |
140 | ||
141 | ||
142 | #define _ETRACE sd, NULL | |
143 | ||
c906108c SS |
144 | #undef ETRACE |
145 | #define ETRACE(ARGS) \ | |
146 | do \ | |
147 | { \ | |
83034798 | 148 | if (STRACE_EVENTS_P (sd)) \ |
c906108c SS |
149 | { \ |
150 | if (STRACE_DEBUG_P (sd)) \ | |
e7505490 | 151 | trace_printf (sd, NULL, "%s:%d: ", lbasename (__FILE__), __LINE__); \ |
c906108c SS |
152 | trace_printf ARGS; \ |
153 | } \ | |
154 | } \ | |
155 | while (0) | |
156 | ||
157 | ||
158 | /* event queue iterator - don't iterate over the held queue. */ | |
159 | ||
160 | #if EXTERN_SIM_EVENTS_P | |
161 | static sim_event ** | |
162 | next_event_queue (SIM_DESC sd, | |
163 | sim_event **queue) | |
164 | { | |
165 | if (queue == NULL) | |
166 | return &STATE_EVENTS (sd)->queue; | |
167 | else if (queue == &STATE_EVENTS (sd)->queue) | |
168 | return &STATE_EVENTS (sd)->watchpoints; | |
169 | else if (queue == &STATE_EVENTS (sd)->watchpoints) | |
170 | return &STATE_EVENTS (sd)->watchedpoints; | |
171 | else if (queue == &STATE_EVENTS (sd)->watchedpoints) | |
172 | return NULL; | |
173 | else | |
174 | sim_io_error (sd, "next_event_queue - bad queue"); | |
175 | return NULL; | |
176 | } | |
177 | #endif | |
178 | ||
179 | ||
180 | STATIC_INLINE_SIM_EVENTS\ | |
181 | (void) | |
182 | sim_events_poll (SIM_DESC sd, | |
183 | void *data) | |
184 | { | |
185 | /* just re-schedule in 1000 million ticks time */ | |
186 | sim_events_schedule (sd, SIM_EVENTS_POLL_RATE, sim_events_poll, sd); | |
187 | sim_io_poll_quit (sd); | |
188 | } | |
189 | ||
190 | ||
191 | /* "events" module install handler. | |
192 | This is called via sim_module_install to install the "events" subsystem | |
193 | into the simulator. */ | |
194 | ||
195 | #if EXTERN_SIM_EVENTS_P | |
196 | STATIC_SIM_EVENTS (MODULE_UNINSTALL_FN) sim_events_uninstall; | |
197 | STATIC_SIM_EVENTS (MODULE_INIT_FN) sim_events_init; | |
198 | STATIC_SIM_EVENTS (MODULE_RESUME_FN) sim_events_resume; | |
199 | STATIC_SIM_EVENTS (MODULE_SUSPEND_FN) sim_events_suspend; | |
200 | #endif | |
201 | ||
202 | #if EXTERN_SIM_EVENTS_P | |
203 | SIM_RC | |
204 | sim_events_install (SIM_DESC sd) | |
205 | { | |
206 | SIM_ASSERT (STATE_MAGIC (sd) == SIM_MAGIC_NUMBER); | |
207 | sim_module_add_uninstall_fn (sd, sim_events_uninstall); | |
208 | sim_module_add_init_fn (sd, sim_events_init); | |
209 | sim_module_add_resume_fn (sd, sim_events_resume); | |
210 | sim_module_add_suspend_fn (sd, sim_events_suspend); | |
211 | return SIM_RC_OK; | |
212 | } | |
213 | #endif | |
214 | ||
215 | ||
216 | /* Suspend/resume the event queue manager when the simulator is not | |
217 | running */ | |
218 | ||
219 | #if EXTERN_SIM_EVENTS_P | |
220 | static SIM_RC | |
221 | sim_events_resume (SIM_DESC sd) | |
222 | { | |
223 | sim_events *events = STATE_EVENTS (sd); | |
224 | SIM_ASSERT (STATE_MAGIC (sd) == SIM_MAGIC_NUMBER); | |
225 | SIM_ASSERT (events->resume_wallclock == 0); | |
226 | events->resume_wallclock = sim_elapsed_time_get (); | |
227 | return SIM_RC_OK; | |
228 | } | |
229 | #endif | |
230 | ||
231 | #if EXTERN_SIM_EVENTS_P | |
232 | static SIM_RC | |
233 | sim_events_suspend (SIM_DESC sd) | |
234 | { | |
235 | sim_events *events = STATE_EVENTS (sd); | |
236 | SIM_ASSERT (STATE_MAGIC (sd) == SIM_MAGIC_NUMBER); | |
237 | SIM_ASSERT (events->resume_wallclock != 0); | |
238 | events->elapsed_wallclock += sim_elapsed_time_since (events->resume_wallclock); | |
239 | events->resume_wallclock = 0; | |
240 | return SIM_RC_OK; | |
241 | } | |
242 | #endif | |
243 | ||
244 | ||
245 | /* Uninstall the "events" subsystem from the simulator. */ | |
246 | ||
247 | #if EXTERN_SIM_EVENTS_P | |
248 | static void | |
249 | sim_events_uninstall (SIM_DESC sd) | |
250 | { | |
251 | SIM_ASSERT (STATE_MAGIC (sd) == SIM_MAGIC_NUMBER); | |
252 | /* FIXME: free buffers, etc. */ | |
253 | } | |
254 | #endif | |
255 | ||
256 | ||
257 | /* malloc/free */ | |
258 | ||
259 | #if EXTERN_SIM_EVENTS_P | |
260 | static sim_event * | |
261 | sim_events_zalloc (SIM_DESC sd) | |
262 | { | |
263 | sim_events *events = STATE_EVENTS (sd); | |
264 | sim_event *new = events->free_list; | |
265 | if (new != NULL) | |
266 | { | |
267 | events->free_list = new->next; | |
268 | memset (new, 0, sizeof (*new)); | |
269 | } | |
270 | else | |
271 | { | |
272 | #if defined (HAVE_SIGPROCMASK) && defined (SIG_SETMASK) | |
273 | /*-LOCK-*/ | |
274 | sigset_t old_mask; | |
275 | sigset_t new_mask; | |
34b47c38 | 276 | sigfillset (&new_mask); |
c906108c SS |
277 | sigprocmask (SIG_SETMASK, &new_mask, &old_mask); |
278 | #endif | |
279 | new = ZALLOC (sim_event); | |
280 | #if defined (HAVE_SIGPROCMASK) && defined (SIG_SETMASK) | |
281 | /*-UNLOCK-*/ | |
282 | sigprocmask (SIG_SETMASK, &old_mask, NULL); | |
283 | #endif | |
284 | } | |
285 | return new; | |
286 | } | |
287 | #endif | |
288 | ||
289 | STATIC_INLINE_SIM_EVENTS\ | |
290 | (void) | |
291 | sim_events_free (SIM_DESC sd, | |
292 | sim_event *dead) | |
293 | { | |
294 | sim_events *events = STATE_EVENTS (sd); | |
295 | dead->next = events->free_list; | |
296 | events->free_list = dead; | |
297 | if (dead->trace != NULL) | |
298 | { | |
299 | free (dead->trace); /* NB: asprintf returns a `free' buf */ | |
300 | dead->trace = NULL; | |
301 | } | |
302 | } | |
303 | ||
304 | ||
305 | /* Initialize the simulator event manager */ | |
306 | ||
307 | #if EXTERN_SIM_EVENTS_P | |
308 | SIM_RC | |
309 | sim_events_init (SIM_DESC sd) | |
310 | { | |
311 | sim_events *events = STATE_EVENTS (sd); | |
312 | ||
313 | /* drain the interrupt queue */ | |
314 | events->nr_held = 0; | |
315 | if (events->held == NULL) | |
316 | events->held = NZALLOC (sim_event, MAX_NR_SIGNAL_SIM_EVENTS); | |
317 | ||
318 | /* drain the normal queues */ | |
319 | { | |
320 | sim_event **queue = NULL; | |
321 | while ((queue = next_event_queue (sd, queue)) != NULL) | |
322 | { | |
323 | if (queue == NULL) break; | |
324 | while (*queue != NULL) | |
325 | { | |
326 | sim_event *dead = *queue; | |
327 | *queue = dead->next; | |
328 | sim_events_free (sd, dead); | |
329 | } | |
330 | *queue = NULL; | |
331 | } | |
332 | } | |
333 | ||
334 | /* wind time back to zero */ | |
335 | events->nr_ticks_to_process = 1; /* start by doing queue */ | |
336 | events->time_of_event = 0; | |
337 | events->time_from_event = 0; | |
338 | events->elapsed_wallclock = 0; | |
339 | events->resume_wallclock = 0; | |
340 | ||
341 | /* schedule our initial counter event */ | |
342 | sim_events_schedule (sd, 0, sim_events_poll, sd); | |
343 | ||
344 | /* from now on, except when the large-int event is being processed | |
345 | the event queue is non empty */ | |
346 | SIM_ASSERT (events->queue != NULL); | |
347 | ||
348 | return SIM_RC_OK; | |
349 | } | |
350 | #endif | |
351 | ||
352 | ||
353 | INLINE_SIM_EVENTS\ | |
354 | (signed64) | |
355 | sim_events_time (SIM_DESC sd) | |
356 | { | |
357 | sim_events *events = STATE_EVENTS (sd); | |
358 | return (events->time_of_event - events->time_from_event); | |
359 | } | |
360 | ||
361 | ||
362 | INLINE_SIM_EVENTS\ | |
363 | (unsigned long) | |
364 | sim_events_elapsed_time (SIM_DESC sd) | |
365 | { | |
366 | unsigned long elapsed = STATE_EVENTS (sd)->elapsed_wallclock; | |
367 | ||
368 | /* Are we being called inside sim_resume? | |
369 | (Is there a simulation in progress?) */ | |
370 | if (STATE_EVENTS (sd)->resume_wallclock != 0) | |
371 | elapsed += sim_elapsed_time_since (STATE_EVENTS (sd)->resume_wallclock); | |
372 | ||
373 | return elapsed; | |
374 | } | |
375 | ||
376 | ||
38e64f35 AC |
377 | /* Returns the time that remains before the event is raised. */ |
378 | INLINE_SIM_EVENTS\ | |
379 | (signed64) | |
380 | sim_events_remain_time (SIM_DESC sd, sim_event *event) | |
381 | { | |
382 | if (event == 0) | |
383 | return 0; | |
028f6515 | 384 | |
38e64f35 AC |
385 | return (event->time_of_event - sim_events_time (sd)); |
386 | } | |
387 | ||
388 | ||
389 | ||
c906108c SS |
390 | STATIC_INLINE_SIM_EVENTS\ |
391 | (void) | |
392 | update_time_from_event (SIM_DESC sd) | |
393 | { | |
394 | sim_events *events = STATE_EVENTS (sd); | |
395 | signed64 current_time = sim_events_time (sd); | |
396 | if (events->queue != NULL) | |
397 | { | |
398 | events->time_of_event = events->queue->time_of_event; | |
399 | events->time_from_event = (events->queue->time_of_event - current_time); | |
400 | } | |
401 | else | |
402 | { | |
403 | events->time_of_event = current_time - 1; | |
404 | events->time_from_event = -1; | |
405 | } | |
83034798 | 406 | if (STRACE_EVENTS_P (sd)) |
5eb1a8fa AC |
407 | { |
408 | sim_event *event; | |
409 | int i; | |
410 | for (event = events->queue, i = 0; | |
411 | event != NULL; | |
412 | event = event->next, i++) | |
413 | { | |
414 | ETRACE ((_ETRACE, | |
415 | "event time-from-event - time %ld, delta %ld - event %d, tag 0x%lx, time %ld, handler 0x%lx, data 0x%lx%s%s\n", | |
416 | (long)current_time, | |
417 | (long)events->time_from_event, | |
418 | i, | |
419 | (long)event, | |
420 | (long)event->time_of_event, | |
421 | (long)event->handler, | |
422 | (long)event->data, | |
423 | (event->trace != NULL) ? ", " : "", | |
424 | (event->trace != NULL) ? event->trace : "")); | |
425 | } | |
426 | } | |
c906108c SS |
427 | SIM_ASSERT (current_time == sim_events_time (sd)); |
428 | } | |
429 | ||
430 | ||
431 | #if EXTERN_SIM_EVENTS_P | |
432 | static void | |
433 | insert_sim_event (SIM_DESC sd, | |
434 | sim_event *new_event, | |
435 | signed64 delta) | |
436 | { | |
437 | sim_events *events = STATE_EVENTS (sd); | |
438 | sim_event *curr; | |
439 | sim_event **prev; | |
440 | signed64 time_of_event; | |
441 | ||
442 | if (delta < 0) | |
443 | sim_io_error (sd, "what is past is past!\n"); | |
028f6515 | 444 | |
6439295f | 445 | /* compute when the event should occur */ |
c906108c | 446 | time_of_event = sim_events_time (sd) + delta; |
028f6515 | 447 | |
c906108c SS |
448 | /* find the queue insertion point - things are time ordered */ |
449 | prev = &events->queue; | |
450 | curr = events->queue; | |
451 | while (curr != NULL && time_of_event >= curr->time_of_event) | |
452 | { | |
453 | SIM_ASSERT (curr->next == NULL | |
454 | || curr->time_of_event <= curr->next->time_of_event); | |
455 | prev = &curr->next; | |
456 | curr = curr->next; | |
457 | } | |
458 | SIM_ASSERT (curr == NULL || time_of_event < curr->time_of_event); | |
028f6515 | 459 | |
c906108c SS |
460 | /* insert it */ |
461 | new_event->next = curr; | |
462 | *prev = new_event; | |
463 | new_event->time_of_event = time_of_event; | |
028f6515 | 464 | |
c906108c SS |
465 | /* adjust the time until the first event */ |
466 | update_time_from_event (sd); | |
467 | } | |
468 | #endif | |
469 | ||
470 | ||
471 | #if EXTERN_SIM_EVENTS_P | |
472 | sim_event * | |
473 | sim_events_schedule (SIM_DESC sd, | |
474 | signed64 delta_time, | |
475 | sim_event_handler *handler, | |
476 | void *data) | |
477 | { | |
478 | va_list dummy; | |
bf962092 | 479 | memset (&dummy, 0, sizeof dummy); |
c906108c SS |
480 | return sim_events_schedule_vtracef (sd, delta_time, handler, data, |
481 | NULL, dummy); | |
482 | } | |
483 | #endif | |
484 | ||
485 | ||
486 | #if EXTERN_SIM_EVENTS_P | |
487 | sim_event * | |
488 | sim_events_schedule_tracef (SIM_DESC sd, | |
489 | signed64 delta_time, | |
490 | sim_event_handler *handler, | |
491 | void *data, | |
492 | const char *fmt, | |
493 | ...) | |
494 | { | |
495 | sim_event *new_event; | |
496 | va_list ap; | |
497 | va_start (ap, fmt); | |
498 | new_event = sim_events_schedule_vtracef (sd, delta_time, handler, data, fmt, ap); | |
499 | va_end (ap); | |
500 | return new_event; | |
501 | } | |
502 | #endif | |
503 | ||
504 | ||
505 | #if EXTERN_SIM_EVENTS_P | |
506 | sim_event * | |
507 | sim_events_schedule_vtracef (SIM_DESC sd, | |
508 | signed64 delta_time, | |
509 | sim_event_handler *handler, | |
510 | void *data, | |
511 | const char *fmt, | |
512 | va_list ap) | |
513 | { | |
514 | sim_event *new_event = sim_events_zalloc (sd); | |
515 | new_event->data = data; | |
516 | new_event->handler = handler; | |
517 | new_event->watching = watch_timer; | |
83034798 | 518 | if (fmt == NULL || !STRACE_EVENTS_P (sd) || vasprintf (&new_event->trace, fmt, ap) < 0) |
c906108c | 519 | new_event->trace = NULL; |
34b47c38 MF |
520 | insert_sim_event (sd, new_event, delta_time); |
521 | ETRACE ((_ETRACE, | |
522 | "event scheduled at %ld - tag 0x%lx - time %ld, handler 0x%lx, data 0x%lx%s%s\n", | |
523 | (long)sim_events_time (sd), | |
524 | (long)new_event, | |
525 | (long)new_event->time_of_event, | |
526 | (long)new_event->handler, | |
527 | (long)new_event->data, | |
528 | (new_event->trace != NULL) ? ", " : "", | |
529 | (new_event->trace != NULL) ? new_event->trace : "")); | |
c906108c SS |
530 | return new_event; |
531 | } | |
532 | #endif | |
533 | ||
534 | ||
535 | #if EXTERN_SIM_EVENTS_P | |
536 | void | |
537 | sim_events_schedule_after_signal (SIM_DESC sd, | |
538 | signed64 delta_time, | |
539 | sim_event_handler *handler, | |
540 | void *data) | |
541 | { | |
542 | sim_events *events = STATE_EVENTS (sd); | |
543 | sim_event *new_event; | |
544 | #if defined (HAVE_SIGPROCMASK) && defined (SIG_SETMASK) | |
545 | /*-LOCK-*/ | |
546 | sigset_t old_mask; | |
547 | sigset_t new_mask; | |
34b47c38 | 548 | sigfillset (&new_mask); |
c906108c SS |
549 | sigprocmask (SIG_SETMASK, &new_mask, &old_mask); |
550 | #endif | |
028f6515 | 551 | |
c906108c SS |
552 | /* allocate an event entry from the signal buffer */ |
553 | new_event = &events->held [events->nr_held]; | |
554 | events->nr_held ++; | |
555 | if (events->nr_held > MAX_NR_SIGNAL_SIM_EVENTS) | |
556 | { | |
557 | sim_engine_abort (NULL, NULL, NULL_CIA, | |
509c2f32 | 558 | "sim_events_schedule_after_signal - buffer overflow"); |
c906108c | 559 | } |
028f6515 | 560 | |
c906108c SS |
561 | new_event->data = data; |
562 | new_event->handler = handler; | |
563 | new_event->time_of_event = delta_time; /* work it out later */ | |
564 | new_event->next = NULL; | |
565 | ||
566 | events->work_pending = 1; /* notify main process */ | |
567 | ||
568 | #if defined (HAVE_SIGPROCMASK) && defined (SIG_SETMASK) | |
569 | /*-UNLOCK-*/ | |
570 | sigprocmask (SIG_SETMASK, &old_mask, NULL); | |
571 | #endif | |
028f6515 | 572 | |
c906108c SS |
573 | ETRACE ((_ETRACE, |
574 | "signal scheduled at %ld - tag 0x%lx - time %ld, handler 0x%lx, data 0x%lx\n", | |
34b47c38 | 575 | (long)sim_events_time (sd), |
c906108c SS |
576 | (long)new_event, |
577 | (long)new_event->time_of_event, | |
578 | (long)new_event->handler, | |
579 | (long)new_event->data)); | |
580 | } | |
581 | #endif | |
582 | ||
583 | ||
584 | #if EXTERN_SIM_EVENTS_P | |
585 | sim_event * | |
586 | sim_events_watch_clock (SIM_DESC sd, | |
587 | unsigned delta_ms_time, | |
588 | sim_event_handler *handler, | |
589 | void *data) | |
590 | { | |
591 | sim_events *events = STATE_EVENTS (sd); | |
592 | sim_event *new_event = sim_events_zalloc (sd); | |
593 | /* type */ | |
594 | new_event->watching = watch_clock; | |
595 | /* handler */ | |
596 | new_event->data = data; | |
597 | new_event->handler = handler; | |
598 | /* data */ | |
599 | if (events->resume_wallclock == 0) | |
600 | new_event->wallclock = (events->elapsed_wallclock + delta_ms_time); | |
601 | else | |
602 | new_event->wallclock = (events->elapsed_wallclock | |
603 | + sim_elapsed_time_since (events->resume_wallclock) | |
604 | + delta_ms_time); | |
605 | /* insert */ | |
606 | new_event->next = events->watchpoints; | |
607 | events->watchpoints = new_event; | |
608 | events->work_pending = 1; | |
609 | ETRACE ((_ETRACE, | |
610 | "event watching clock at %ld - tag 0x%lx - wallclock %ld, handler 0x%lx, data 0x%lx\n", | |
611 | (long)sim_events_time (sd), | |
612 | (long)new_event, | |
613 | (long)new_event->wallclock, | |
614 | (long)new_event->handler, | |
615 | (long)new_event->data)); | |
616 | return new_event; | |
617 | } | |
618 | #endif | |
619 | ||
620 | ||
621 | #if EXTERN_SIM_EVENTS_P | |
622 | sim_event * | |
623 | sim_events_watch_sim (SIM_DESC sd, | |
624 | void *host_addr, | |
625 | int nr_bytes, | |
626 | int byte_order, | |
627 | int is_within, | |
628 | unsigned64 lb, | |
629 | unsigned64 ub, | |
630 | sim_event_handler *handler, | |
631 | void *data) | |
632 | { | |
633 | sim_events *events = STATE_EVENTS (sd); | |
634 | sim_event *new_event = sim_events_zalloc (sd); | |
635 | /* type */ | |
636 | switch (byte_order) | |
637 | { | |
1ac72f06 | 638 | case BFD_ENDIAN_UNKNOWN: |
c906108c SS |
639 | switch (nr_bytes) |
640 | { | |
641 | case 1: new_event->watching = watch_sim_host_1; break; | |
642 | case 2: new_event->watching = watch_sim_host_2; break; | |
643 | case 4: new_event->watching = watch_sim_host_4; break; | |
644 | case 8: new_event->watching = watch_sim_host_8; break; | |
645 | default: sim_io_error (sd, "sim_events_watch_sim - invalid nr bytes"); | |
646 | } | |
647 | break; | |
1ac72f06 | 648 | case BFD_ENDIAN_BIG: |
c906108c SS |
649 | switch (nr_bytes) |
650 | { | |
651 | case 1: new_event->watching = watch_sim_be_1; break; | |
652 | case 2: new_event->watching = watch_sim_be_2; break; | |
653 | case 4: new_event->watching = watch_sim_be_4; break; | |
654 | case 8: new_event->watching = watch_sim_be_8; break; | |
655 | default: sim_io_error (sd, "sim_events_watch_sim - invalid nr bytes"); | |
656 | } | |
657 | break; | |
1ac72f06 | 658 | case BFD_ENDIAN_LITTLE: |
c906108c SS |
659 | switch (nr_bytes) |
660 | { | |
661 | case 1: new_event->watching = watch_sim_le_1; break; | |
662 | case 2: new_event->watching = watch_sim_le_2; break; | |
663 | case 4: new_event->watching = watch_sim_le_4; break; | |
664 | case 8: new_event->watching = watch_sim_le_8; break; | |
665 | default: sim_io_error (sd, "sim_events_watch_sim - invalid nr bytes"); | |
666 | } | |
667 | break; | |
668 | default: | |
669 | sim_io_error (sd, "sim_events_watch_sim - invalid byte order"); | |
670 | } | |
671 | /* handler */ | |
672 | new_event->data = data; | |
673 | new_event->handler = handler; | |
674 | /* data */ | |
675 | new_event->host_addr = host_addr; | |
676 | new_event->lb = lb; | |
677 | new_event->lb64 = lb; | |
678 | new_event->ub = ub; | |
679 | new_event->ub64 = ub; | |
680 | new_event->is_within = (is_within != 0); | |
681 | /* insert */ | |
682 | new_event->next = events->watchpoints; | |
683 | events->watchpoints = new_event; | |
684 | events->work_pending = 1; | |
685 | ETRACE ((_ETRACE, | |
686 | "event watching host at %ld - tag 0x%lx - host-addr 0x%lx, 0x%lx..0x%lx, handler 0x%lx, data 0x%lx\n", | |
687 | (long)sim_events_time (sd), | |
688 | (long)new_event, | |
689 | (long)new_event->host_addr, | |
690 | (long)new_event->lb, | |
691 | (long)new_event->ub, | |
692 | (long)new_event->handler, | |
693 | (long)new_event->data)); | |
694 | return new_event; | |
695 | } | |
696 | #endif | |
697 | ||
698 | ||
699 | #if EXTERN_SIM_EVENTS_P | |
700 | sim_event * | |
701 | sim_events_watch_core (SIM_DESC sd, | |
702 | address_word core_addr, | |
703 | unsigned core_map, | |
704 | int nr_bytes, | |
705 | int byte_order, | |
706 | int is_within, | |
707 | unsigned64 lb, | |
708 | unsigned64 ub, | |
709 | sim_event_handler *handler, | |
710 | void *data) | |
711 | { | |
712 | sim_events *events = STATE_EVENTS (sd); | |
713 | sim_event *new_event = sim_events_zalloc (sd); | |
714 | /* type */ | |
715 | switch (byte_order) | |
716 | { | |
1ac72f06 | 717 | case BFD_ENDIAN_UNKNOWN: |
c906108c SS |
718 | switch (nr_bytes) |
719 | { | |
720 | case 1: new_event->watching = watch_core_targ_1; break; | |
721 | case 2: new_event->watching = watch_core_targ_2; break; | |
722 | case 4: new_event->watching = watch_core_targ_4; break; | |
723 | case 8: new_event->watching = watch_core_targ_8; break; | |
724 | default: sim_io_error (sd, "sim_events_watch_core - invalid nr bytes"); | |
725 | } | |
726 | break; | |
1ac72f06 | 727 | case BFD_ENDIAN_BIG: |
c906108c SS |
728 | switch (nr_bytes) |
729 | { | |
730 | case 1: new_event->watching = watch_core_be_1; break; | |
731 | case 2: new_event->watching = watch_core_be_2; break; | |
732 | case 4: new_event->watching = watch_core_be_4; break; | |
733 | case 8: new_event->watching = watch_core_be_8; break; | |
734 | default: sim_io_error (sd, "sim_events_watch_core - invalid nr bytes"); | |
735 | } | |
736 | break; | |
1ac72f06 | 737 | case BFD_ENDIAN_LITTLE: |
c906108c SS |
738 | switch (nr_bytes) |
739 | { | |
740 | case 1: new_event->watching = watch_core_le_1; break; | |
741 | case 2: new_event->watching = watch_core_le_2; break; | |
742 | case 4: new_event->watching = watch_core_le_4; break; | |
743 | case 8: new_event->watching = watch_core_le_8; break; | |
744 | default: sim_io_error (sd, "sim_events_watch_core - invalid nr bytes"); | |
745 | } | |
746 | break; | |
747 | default: | |
748 | sim_io_error (sd, "sim_events_watch_core - invalid byte order"); | |
749 | } | |
750 | /* handler */ | |
751 | new_event->data = data; | |
752 | new_event->handler = handler; | |
753 | /* data */ | |
754 | new_event->core_addr = core_addr; | |
755 | new_event->core_map = core_map; | |
756 | new_event->lb = lb; | |
757 | new_event->lb64 = lb; | |
758 | new_event->ub = ub; | |
759 | new_event->ub64 = ub; | |
760 | new_event->is_within = (is_within != 0); | |
761 | /* insert */ | |
762 | new_event->next = events->watchpoints; | |
763 | events->watchpoints = new_event; | |
764 | events->work_pending = 1; | |
765 | ETRACE ((_ETRACE, | |
766 | "event watching host at %ld - tag 0x%lx - host-addr 0x%lx, 0x%lx..0x%lx, handler 0x%lx, data 0x%lx\n", | |
767 | (long)sim_events_time (sd), | |
768 | (long)new_event, | |
769 | (long)new_event->host_addr, | |
770 | (long)new_event->lb, | |
771 | (long)new_event->ub, | |
772 | (long)new_event->handler, | |
773 | (long)new_event->data)); | |
774 | return new_event; | |
775 | } | |
776 | #endif | |
777 | ||
778 | ||
779 | #if EXTERN_SIM_EVENTS_P | |
780 | void | |
781 | sim_events_deschedule (SIM_DESC sd, | |
782 | sim_event *event_to_remove) | |
783 | { | |
784 | sim_events *events = STATE_EVENTS (sd); | |
785 | sim_event *to_remove = (sim_event*)event_to_remove; | |
786 | if (event_to_remove != NULL) | |
787 | { | |
788 | sim_event **queue = NULL; | |
789 | while ((queue = next_event_queue (sd, queue)) != NULL) | |
790 | { | |
791 | sim_event **ptr_to_current; | |
792 | for (ptr_to_current = queue; | |
793 | *ptr_to_current != NULL && *ptr_to_current != to_remove; | |
794 | ptr_to_current = &(*ptr_to_current)->next); | |
795 | if (*ptr_to_current == to_remove) | |
796 | { | |
797 | sim_event *dead = *ptr_to_current; | |
798 | *ptr_to_current = dead->next; | |
799 | ETRACE ((_ETRACE, | |
800 | "event/watch descheduled at %ld - tag 0x%lx - time %ld, handler 0x%lx, data 0x%lx%s%s\n", | |
801 | (long) sim_events_time (sd), | |
802 | (long) event_to_remove, | |
803 | (long) dead->time_of_event, | |
804 | (long) dead->handler, | |
805 | (long) dead->data, | |
806 | (dead->trace != NULL) ? ", " : "", | |
807 | (dead->trace != NULL) ? dead->trace : "")); | |
808 | sim_events_free (sd, dead); | |
809 | update_time_from_event (sd); | |
810 | SIM_ASSERT ((events->time_from_event >= 0) == (events->queue != NULL)); | |
811 | return; | |
812 | } | |
813 | } | |
814 | } | |
815 | ETRACE ((_ETRACE, | |
816 | "event/watch descheduled at %ld - tag 0x%lx - not found\n", | |
817 | (long) sim_events_time (sd), | |
818 | (long) event_to_remove)); | |
819 | } | |
820 | #endif | |
821 | ||
822 | ||
823 | STATIC_INLINE_SIM_EVENTS\ | |
824 | (int) | |
825 | sim_watch_valid (SIM_DESC sd, | |
826 | sim_event *to_do) | |
827 | { | |
828 | switch (to_do->watching) | |
829 | { | |
830 | ||
831 | #define WATCH_CORE(N,OP,EXT) \ | |
832 | int ok; \ | |
833 | unsigned_##N word = 0; \ | |
834 | int nr_read = sim_core_read_buffer (sd, NULL, to_do->core_map, &word, \ | |
835 | to_do->core_addr, sizeof (word)); \ | |
836 | OP (word); \ | |
837 | ok = (nr_read == sizeof (unsigned_##N) \ | |
838 | && (to_do->is_within \ | |
839 | == (word >= to_do->lb##EXT \ | |
840 | && word <= to_do->ub##EXT))); | |
841 | ||
842 | case watch_core_targ_1: | |
843 | { | |
844 | WATCH_CORE (1, T2H,); | |
845 | return ok; | |
846 | } | |
847 | case watch_core_targ_2: | |
848 | { | |
849 | WATCH_CORE (2, T2H,); | |
850 | return ok; | |
851 | } | |
852 | case watch_core_targ_4: | |
853 | { | |
854 | WATCH_CORE (4, T2H,); | |
855 | return ok; | |
856 | } | |
857 | case watch_core_targ_8: | |
858 | { | |
859 | WATCH_CORE (8, T2H,64); | |
860 | return ok; | |
861 | } | |
862 | ||
863 | case watch_core_be_1: | |
864 | { | |
865 | WATCH_CORE (1, BE2H,); | |
866 | return ok; | |
867 | } | |
868 | case watch_core_be_2: | |
869 | { | |
870 | WATCH_CORE (2, BE2H,); | |
871 | return ok; | |
872 | } | |
873 | case watch_core_be_4: | |
874 | { | |
875 | WATCH_CORE (4, BE2H,); | |
876 | return ok; | |
877 | } | |
878 | case watch_core_be_8: | |
879 | { | |
880 | WATCH_CORE (8, BE2H,64); | |
881 | return ok; | |
882 | } | |
883 | ||
884 | case watch_core_le_1: | |
885 | { | |
886 | WATCH_CORE (1, LE2H,); | |
887 | return ok; | |
888 | } | |
889 | case watch_core_le_2: | |
890 | { | |
891 | WATCH_CORE (2, LE2H,); | |
892 | return ok; | |
893 | } | |
894 | case watch_core_le_4: | |
895 | { | |
896 | WATCH_CORE (4, LE2H,); | |
897 | return ok; | |
898 | } | |
899 | case watch_core_le_8: | |
900 | { | |
901 | WATCH_CORE (8, LE2H,64); | |
902 | return ok; | |
903 | } | |
904 | #undef WATCH_CORE | |
905 | ||
906 | #define WATCH_SIM(N,OP,EXT) \ | |
907 | int ok; \ | |
908 | unsigned_##N word = *(unsigned_##N*)to_do->host_addr; \ | |
909 | OP (word); \ | |
910 | ok = (to_do->is_within \ | |
911 | == (word >= to_do->lb##EXT \ | |
912 | && word <= to_do->ub##EXT)); | |
913 | ||
914 | case watch_sim_host_1: | |
915 | { | |
916 | WATCH_SIM (1, word = ,); | |
917 | return ok; | |
918 | } | |
919 | case watch_sim_host_2: | |
920 | { | |
921 | WATCH_SIM (2, word = ,); | |
922 | return ok; | |
923 | } | |
924 | case watch_sim_host_4: | |
925 | { | |
926 | WATCH_SIM (4, word = ,); | |
927 | return ok; | |
928 | } | |
929 | case watch_sim_host_8: | |
930 | { | |
931 | WATCH_SIM (8, word = ,64); | |
932 | return ok; | |
933 | } | |
934 | ||
935 | case watch_sim_be_1: | |
936 | { | |
937 | WATCH_SIM (1, BE2H,); | |
938 | return ok; | |
939 | } | |
940 | case watch_sim_be_2: | |
941 | { | |
942 | WATCH_SIM (2, BE2H,); | |
943 | return ok; | |
944 | } | |
945 | case watch_sim_be_4: | |
946 | { | |
947 | WATCH_SIM (4, BE2H,); | |
948 | return ok; | |
949 | } | |
950 | case watch_sim_be_8: | |
951 | { | |
952 | WATCH_SIM (8, BE2H,64); | |
953 | return ok; | |
954 | } | |
955 | ||
956 | case watch_sim_le_1: | |
957 | { | |
958 | WATCH_SIM (1, LE2H,); | |
959 | return ok; | |
960 | } | |
961 | case watch_sim_le_2: | |
962 | { | |
963 | WATCH_SIM (1, LE2H,); | |
964 | return ok; | |
965 | } | |
966 | case watch_sim_le_4: | |
967 | { | |
968 | WATCH_SIM (1, LE2H,); | |
969 | return ok; | |
970 | } | |
971 | case watch_sim_le_8: | |
972 | { | |
973 | WATCH_SIM (1, LE2H,64); | |
974 | return ok; | |
975 | } | |
976 | #undef WATCH_SIM | |
977 | ||
978 | case watch_clock: /* wallclock */ | |
979 | { | |
980 | unsigned long elapsed_time = sim_events_elapsed_time (sd); | |
981 | return (elapsed_time >= to_do->wallclock); | |
982 | } | |
983 | ||
984 | default: | |
985 | sim_io_error (sd, "sim_watch_valid - bad switch"); | |
986 | break; | |
987 | ||
988 | } | |
989 | return 1; | |
990 | } | |
991 | ||
992 | ||
993 | INLINE_SIM_EVENTS\ | |
994 | (int) | |
995 | sim_events_tick (SIM_DESC sd) | |
996 | { | |
997 | sim_events *events = STATE_EVENTS (sd); | |
998 | ||
999 | /* this should only be called after the previous ticks have been | |
1000 | fully processed */ | |
1001 | ||
1002 | /* Advance the time but *only* if there is nothing to process */ | |
1003 | if (events->work_pending | |
1004 | || events->time_from_event == 0) | |
1005 | { | |
1006 | events->nr_ticks_to_process += 1; | |
1007 | return 1; | |
1008 | } | |
1009 | else | |
1010 | { | |
1011 | events->time_from_event -= 1; | |
1012 | return 0; | |
1013 | } | |
1014 | } | |
1015 | ||
1016 | ||
1017 | INLINE_SIM_EVENTS\ | |
1018 | (int) | |
1019 | sim_events_tickn (SIM_DESC sd, | |
1020 | int n) | |
1021 | { | |
1022 | sim_events *events = STATE_EVENTS (sd); | |
1023 | SIM_ASSERT (n > 0); | |
1024 | ||
1025 | /* this should only be called after the previous ticks have been | |
1026 | fully processed */ | |
1027 | ||
1028 | /* Advance the time but *only* if there is nothing to process */ | |
1029 | if (events->work_pending || events->time_from_event < n) | |
1030 | { | |
1031 | events->nr_ticks_to_process += n; | |
1032 | return 1; | |
1033 | } | |
1034 | else | |
1035 | { | |
1036 | events->time_from_event -= n; | |
1037 | return 0; | |
1038 | } | |
1039 | } | |
1040 | ||
1041 | ||
1042 | INLINE_SIM_EVENTS\ | |
1043 | (void) | |
1044 | sim_events_slip (SIM_DESC sd, | |
1045 | int slip) | |
1046 | { | |
1047 | sim_events *events = STATE_EVENTS (sd); | |
1048 | SIM_ASSERT (slip > 0); | |
1049 | ||
1050 | /* Flag a ready event with work_pending instead of number of ticks | |
1051 | to process so that the time continues to be correct */ | |
1052 | if (events->time_from_event < slip) | |
1053 | { | |
1054 | events->work_pending = 1; | |
1055 | } | |
1056 | events->time_from_event -= slip; | |
1057 | } | |
1058 | ||
1059 | ||
1060 | INLINE_SIM_EVENTS\ | |
1061 | (void) | |
1062 | sim_events_preprocess (SIM_DESC sd, | |
1063 | int events_were_last, | |
1064 | int events_were_next) | |
1065 | { | |
34b47c38 | 1066 | sim_events *events = STATE_EVENTS (sd); |
c906108c SS |
1067 | if (events_were_last) |
1068 | { | |
1069 | /* Halted part way through event processing */ | |
1070 | ASSERT (events->nr_ticks_to_process != 0); | |
1071 | /* The external world can't tell if the event that stopped the | |
1072 | simulator was the last event to process. */ | |
1073 | ASSERT (events_were_next); | |
1074 | sim_events_process (sd); | |
1075 | } | |
1076 | else if (events_were_next) | |
1077 | { | |
1078 | /* Halted by the last processor */ | |
1079 | if (sim_events_tick (sd)) | |
1080 | sim_events_process (sd); | |
1081 | } | |
1082 | } | |
1083 | ||
1084 | ||
1085 | INLINE_SIM_EVENTS\ | |
1086 | (void) | |
1087 | sim_events_process (SIM_DESC sd) | |
1088 | { | |
34b47c38 MF |
1089 | sim_events *events = STATE_EVENTS (sd); |
1090 | signed64 event_time = sim_events_time (sd); | |
c906108c SS |
1091 | |
1092 | /* Clear work_pending before checking nr_held. Clearing | |
1093 | work_pending after nr_held (with out a lock could loose an | |
1094 | event). */ | |
1095 | events->work_pending = 0; | |
1096 | ||
1097 | /* move any events that were asynchronously queued by any signal | |
1098 | handlers onto the real event queue. */ | |
1099 | if (events->nr_held > 0) | |
1100 | { | |
1101 | int i; | |
028f6515 | 1102 | |
c906108c SS |
1103 | #if defined(HAVE_SIGPROCMASK) && defined(SIG_SETMASK) |
1104 | /*-LOCK-*/ | |
1105 | sigset_t old_mask; | |
1106 | sigset_t new_mask; | |
34b47c38 MF |
1107 | sigfillset (&new_mask); |
1108 | sigprocmask (SIG_SETMASK, &new_mask, &old_mask); | |
c906108c SS |
1109 | #endif |
1110 | ||
1111 | for (i = 0; i < events->nr_held; i++) | |
1112 | { | |
1113 | sim_event *entry = &events->held [i]; | |
1114 | sim_events_schedule (sd, | |
1115 | entry->time_of_event, | |
1116 | entry->handler, | |
1117 | entry->data); | |
1118 | } | |
1119 | events->nr_held = 0; | |
028f6515 | 1120 | |
c906108c SS |
1121 | #if defined(HAVE_SIGPROCMASK) && defined(SIG_SETMASK) |
1122 | /*-UNLOCK-*/ | |
34b47c38 | 1123 | sigprocmask (SIG_SETMASK, &old_mask, NULL); |
c906108c | 1124 | #endif |
028f6515 | 1125 | |
c906108c | 1126 | } |
028f6515 | 1127 | |
c906108c SS |
1128 | /* Process any watchpoints. Be careful to allow a watchpoint to |
1129 | appear/disappear under our feet. | |
1130 | To ensure that watchpoints are processed only once per cycle, | |
1131 | they are moved onto a watched queue, this returned to the | |
1132 | watchpoint queue when all queue processing has been | |
1133 | completed. */ | |
1134 | while (events->watchpoints != NULL) | |
1135 | { | |
1136 | sim_event *to_do = events->watchpoints; | |
1137 | events->watchpoints = to_do->next; | |
1138 | if (sim_watch_valid (sd, to_do)) | |
1139 | { | |
1140 | sim_event_handler *handler = to_do->handler; | |
1141 | void *data = to_do->data; | |
34b47c38 MF |
1142 | ETRACE ((_ETRACE, |
1143 | "event issued at %ld - tag 0x%lx - handler 0x%lx, data 0x%lx%s%s\n", | |
1144 | (long) event_time, | |
1145 | (long) to_do, | |
1146 | (long) handler, | |
1147 | (long) data, | |
1148 | (to_do->trace != NULL) ? ", " : "", | |
1149 | (to_do->trace != NULL) ? to_do->trace : "")); | |
c906108c SS |
1150 | sim_events_free (sd, to_do); |
1151 | handler (sd, data); | |
1152 | } | |
1153 | else | |
1154 | { | |
1155 | to_do->next = events->watchedpoints; | |
1156 | events->watchedpoints = to_do; | |
1157 | } | |
1158 | } | |
028f6515 | 1159 | |
c906108c SS |
1160 | /* consume all events for this or earlier times. Be careful to |
1161 | allow an event to appear/disappear under our feet */ | |
1162 | while (events->queue->time_of_event < | |
1163 | (event_time + events->nr_ticks_to_process)) | |
1164 | { | |
1165 | sim_event *to_do = events->queue; | |
1166 | sim_event_handler *handler = to_do->handler; | |
1167 | void *data = to_do->data; | |
1168 | events->queue = to_do->next; | |
1169 | update_time_from_event (sd); | |
34b47c38 MF |
1170 | ETRACE ((_ETRACE, |
1171 | "event issued at %ld - tag 0x%lx - handler 0x%lx, data 0x%lx%s%s\n", | |
1172 | (long) event_time, | |
1173 | (long) to_do, | |
1174 | (long) handler, | |
1175 | (long) data, | |
1176 | (to_do->trace != NULL) ? ", " : "", | |
1177 | (to_do->trace != NULL) ? to_do->trace : "")); | |
c906108c SS |
1178 | sim_events_free (sd, to_do); |
1179 | handler (sd, data); | |
1180 | } | |
028f6515 | 1181 | |
c906108c SS |
1182 | /* put things back where they belong ready for the next iteration */ |
1183 | events->watchpoints = events->watchedpoints; | |
1184 | events->watchedpoints = NULL; | |
1185 | if (events->watchpoints != NULL) | |
1186 | events->work_pending = 1; | |
028f6515 | 1187 | |
c906108c SS |
1188 | /* advance the time */ |
1189 | SIM_ASSERT (events->time_from_event >= events->nr_ticks_to_process); | |
1190 | SIM_ASSERT (events->queue != NULL); /* always poll event */ | |
1191 | events->time_from_event -= events->nr_ticks_to_process; | |
1192 | ||
1193 | /* this round of processing complete */ | |
1194 | events->nr_ticks_to_process = 0; | |
c906108c SS |
1195 | } |
1196 | ||
1197 | #endif |