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1 | /* Ada Ravenscar thread support. | |
2 | ||
3 | Copyright (C) 2004-2018 Free Software Foundation, Inc. | |
4 | ||
5 | This file is part of GDB. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 3 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
19 | ||
20 | #include "defs.h" | |
21 | #include "gdbcore.h" | |
22 | #include "gdbthread.h" | |
23 | #include "ada-lang.h" | |
24 | #include "target.h" | |
25 | #include "inferior.h" | |
26 | #include "command.h" | |
27 | #include "ravenscar-thread.h" | |
28 | #include "observable.h" | |
29 | #include "gdbcmd.h" | |
30 | #include "top.h" | |
31 | #include "regcache.h" | |
32 | #include "objfiles.h" | |
33 | ||
34 | /* This module provides support for "Ravenscar" tasks (Ada) when | |
35 | debugging on bare-metal targets. | |
36 | ||
37 | The typical situation is when debugging a bare-metal target over | |
38 | the remote protocol. In that situation, the system does not know | |
39 | about high-level comcepts such as threads, only about some code | |
40 | running on one or more CPUs. And since the remote protocol does not | |
41 | provide any handling for CPUs, the de facto standard for handling | |
42 | them is to have one thread per CPU, where the thread's ptid has | |
43 | its lwp field set to the CPU number (eg: 1 for the first CPU, | |
44 | 2 for the second one, etc). This module will make that assumption. | |
45 | ||
46 | This module then creates and maintains the list of threads based | |
47 | on the list of Ada tasks, with one thread per Ada tasks. The convention | |
48 | is that threads corresponding to the CPUs (see assumption above) | |
49 | have a ptid_t of the form (PID, LWP, 0), which threads corresponding | |
50 | to our Ada tasks have a ptid_t of the form (PID, 0, TID) where TID | |
51 | is the Ada task's ID as extracted from Ada runtime information. | |
52 | ||
53 | Switching to a given Ada tasks (or its underlying thread) is performed | |
54 | by fetching the registers of that tasks from the memory area where | |
55 | the registers were saved. For any of the other operations, the | |
56 | operation is performed by first finding the CPU on which the task | |
57 | is running, switching to its corresponding ptid, and then performing | |
58 | the operation on that ptid using the target beneath us. */ | |
59 | ||
60 | /* If non-null, ravenscar task support is enabled. */ | |
61 | static int ravenscar_task_support = 1; | |
62 | ||
63 | /* This module's target-specific operations. */ | |
64 | static struct target_ops ravenscar_ops; | |
65 | ||
66 | /* PTID of the last thread that received an event. | |
67 | This can be useful to determine the associated task that received | |
68 | the event, to make it the current task. */ | |
69 | static ptid_t base_ptid; | |
70 | ||
71 | static const char running_thread_name[] = "__gnat_running_thread_table"; | |
72 | ||
73 | static const char known_tasks_name[] = "system__tasking__debug__known_tasks"; | |
74 | static const char first_task_name[] = "system__tasking__debug__first_task"; | |
75 | ||
76 | static const char ravenscar_runtime_initializer[] = | |
77 | "system__bb__threads__initialize"; | |
78 | ||
79 | static void ravenscar_update_thread_list (struct target_ops *ops); | |
80 | static ptid_t ravenscar_active_task (int cpu); | |
81 | static const char *ravenscar_extra_thread_info (struct target_ops *self, | |
82 | struct thread_info *tp); | |
83 | static int ravenscar_thread_alive (struct target_ops *ops, ptid_t ptid); | |
84 | static void ravenscar_fetch_registers (struct target_ops *ops, | |
85 | struct regcache *regcache, int regnum); | |
86 | static void ravenscar_store_registers (struct target_ops *ops, | |
87 | struct regcache *regcache, int regnum); | |
88 | static void ravenscar_prepare_to_store (struct target_ops *self, | |
89 | struct regcache *regcache); | |
90 | static void ravenscar_resume (struct target_ops *ops, ptid_t ptid, int step, | |
91 | enum gdb_signal siggnal); | |
92 | static void ravenscar_mourn_inferior (struct target_ops *ops); | |
93 | static void ravenscar_update_inferior_ptid (void); | |
94 | static int has_ravenscar_runtime (void); | |
95 | static int ravenscar_runtime_initialized (void); | |
96 | static void ravenscar_inferior_created (struct target_ops *target, | |
97 | int from_tty); | |
98 | ||
99 | /* Return nonzero iff PTID corresponds to a ravenscar task. */ | |
100 | ||
101 | static int | |
102 | is_ravenscar_task (ptid_t ptid) | |
103 | { | |
104 | /* By construction, ravenscar tasks have their LWP set to zero. | |
105 | Also make sure that the TID is nonzero, as some remotes, when | |
106 | asked for the list of threads, will return the first thread | |
107 | as having its TID set to zero. For instance, TSIM version | |
108 | 2.0.48 for LEON3 sends 'm0' as a reply to the 'qfThreadInfo' | |
109 | query, which the remote protocol layer then treats as a thread | |
110 | whose TID is 0. This is obviously not a ravenscar task. */ | |
111 | return ptid_get_lwp (ptid) == 0 && ptid_get_tid (ptid) != 0; | |
112 | } | |
113 | ||
114 | /* Given PTID, which can be either a ravenscar task or a CPU thread, | |
115 | return which CPU that ptid is running on. | |
116 | ||
117 | This assume that PTID is a valid ptid_t. Otherwise, a gdb_assert | |
118 | will be triggered. */ | |
119 | ||
120 | static int | |
121 | ravenscar_get_thread_base_cpu (ptid_t ptid) | |
122 | { | |
123 | int base_cpu; | |
124 | ||
125 | if (is_ravenscar_task (ptid)) | |
126 | { | |
127 | struct ada_task_info *task_info = ada_get_task_info_from_ptid (ptid); | |
128 | ||
129 | gdb_assert (task_info != NULL); | |
130 | base_cpu = task_info->base_cpu; | |
131 | } | |
132 | else | |
133 | { | |
134 | /* We assume that the LWP of the PTID is equal to the CPU number. */ | |
135 | base_cpu = ptid_get_lwp (ptid); | |
136 | } | |
137 | ||
138 | return base_cpu; | |
139 | } | |
140 | ||
141 | /* Given a ravenscar task (identified by its ptid_t PTID), return nonzero | |
142 | if this task is the currently active task on the cpu that task is | |
143 | running on. | |
144 | ||
145 | In other words, this function determine which CPU this task is | |
146 | currently running on, and then return nonzero if the CPU in question | |
147 | is executing the code for that task. If that's the case, then | |
148 | that task's registers are in the CPU bank. Otherwise, the task | |
149 | is currently suspended, and its registers have been saved in memory. */ | |
150 | ||
151 | static int | |
152 | ravenscar_task_is_currently_active (ptid_t ptid) | |
153 | { | |
154 | ptid_t active_task_ptid | |
155 | = ravenscar_active_task (ravenscar_get_thread_base_cpu (ptid)); | |
156 | ||
157 | return ptid_equal (ptid, active_task_ptid); | |
158 | } | |
159 | ||
160 | /* Return the CPU thread (as a ptid_t) on which the given ravenscar | |
161 | task is running. | |
162 | ||
163 | This is the thread that corresponds to the CPU on which the task | |
164 | is running. */ | |
165 | ||
166 | static ptid_t | |
167 | get_base_thread_from_ravenscar_task (ptid_t ptid) | |
168 | { | |
169 | int base_cpu; | |
170 | ||
171 | if (!is_ravenscar_task (ptid)) | |
172 | return ptid; | |
173 | ||
174 | base_cpu = ravenscar_get_thread_base_cpu (ptid); | |
175 | return ptid_build (ptid_get_pid (ptid), base_cpu, 0); | |
176 | } | |
177 | ||
178 | /* Fetch the ravenscar running thread from target memory and | |
179 | update inferior_ptid accordingly. */ | |
180 | ||
181 | static void | |
182 | ravenscar_update_inferior_ptid (void) | |
183 | { | |
184 | int base_cpu; | |
185 | ||
186 | base_ptid = inferior_ptid; | |
187 | ||
188 | gdb_assert (!is_ravenscar_task (inferior_ptid)); | |
189 | base_cpu = ravenscar_get_thread_base_cpu (base_ptid); | |
190 | ||
191 | /* If the runtime has not been initialized yet, the inferior_ptid is | |
192 | the only ptid that there is. */ | |
193 | if (!ravenscar_runtime_initialized ()) | |
194 | return; | |
195 | ||
196 | /* Make sure we set base_ptid before calling ravenscar_active_task | |
197 | as the latter relies on it. */ | |
198 | inferior_ptid = ravenscar_active_task (base_cpu); | |
199 | gdb_assert (!ptid_equal (inferior_ptid, null_ptid)); | |
200 | ||
201 | /* The running thread may not have been added to | |
202 | system.tasking.debug's list yet; so ravenscar_update_thread_list | |
203 | may not always add it to the thread list. Add it here. */ | |
204 | if (!find_thread_ptid (inferior_ptid)) | |
205 | add_thread (inferior_ptid); | |
206 | } | |
207 | ||
208 | /* The Ravenscar Runtime exports a symbol which contains the ID of | |
209 | the thread that is currently running. Try to locate that symbol | |
210 | and return its associated minimal symbol. | |
211 | Return NULL if not found. */ | |
212 | ||
213 | static struct bound_minimal_symbol | |
214 | get_running_thread_msymbol (void) | |
215 | { | |
216 | struct bound_minimal_symbol msym; | |
217 | ||
218 | msym = lookup_minimal_symbol (running_thread_name, NULL, NULL); | |
219 | if (!msym.minsym) | |
220 | /* Older versions of the GNAT runtime were using a different | |
221 | (less ideal) name for the symbol where the active thread ID | |
222 | is stored. If we couldn't find the symbol using the latest | |
223 | name, then try the old one. */ | |
224 | msym = lookup_minimal_symbol ("running_thread", NULL, NULL); | |
225 | ||
226 | return msym; | |
227 | } | |
228 | ||
229 | /* Return True if the Ada Ravenscar run-time can be found in the | |
230 | application. */ | |
231 | ||
232 | static int | |
233 | has_ravenscar_runtime (void) | |
234 | { | |
235 | struct bound_minimal_symbol msym_ravenscar_runtime_initializer = | |
236 | lookup_minimal_symbol (ravenscar_runtime_initializer, NULL, NULL); | |
237 | struct bound_minimal_symbol msym_known_tasks = | |
238 | lookup_minimal_symbol (known_tasks_name, NULL, NULL); | |
239 | struct bound_minimal_symbol msym_first_task = | |
240 | lookup_minimal_symbol (first_task_name, NULL, NULL); | |
241 | struct bound_minimal_symbol msym_running_thread | |
242 | = get_running_thread_msymbol (); | |
243 | ||
244 | return (msym_ravenscar_runtime_initializer.minsym | |
245 | && (msym_known_tasks.minsym || msym_first_task.minsym) | |
246 | && msym_running_thread.minsym); | |
247 | } | |
248 | ||
249 | /* Return True if the Ada Ravenscar run-time can be found in the | |
250 | application, and if it has been initialized on target. */ | |
251 | ||
252 | static int | |
253 | ravenscar_runtime_initialized (void) | |
254 | { | |
255 | return (!(ptid_equal (ravenscar_active_task (1), null_ptid))); | |
256 | } | |
257 | ||
258 | /* Return the ID of the thread that is currently running. | |
259 | Return 0 if the ID could not be determined. */ | |
260 | ||
261 | static CORE_ADDR | |
262 | get_running_thread_id (int cpu) | |
263 | { | |
264 | struct bound_minimal_symbol object_msym = get_running_thread_msymbol (); | |
265 | int object_size; | |
266 | int buf_size; | |
267 | gdb_byte *buf; | |
268 | CORE_ADDR object_addr; | |
269 | struct type *builtin_type_void_data_ptr = | |
270 | builtin_type (target_gdbarch ())->builtin_data_ptr; | |
271 | ||
272 | if (!object_msym.minsym) | |
273 | return 0; | |
274 | ||
275 | object_size = TYPE_LENGTH (builtin_type_void_data_ptr); | |
276 | object_addr = (BMSYMBOL_VALUE_ADDRESS (object_msym) | |
277 | + (cpu - 1) * object_size); | |
278 | buf_size = object_size; | |
279 | buf = (gdb_byte *) alloca (buf_size); | |
280 | read_memory (object_addr, buf, buf_size); | |
281 | return extract_typed_address (buf, builtin_type_void_data_ptr); | |
282 | } | |
283 | ||
284 | static void | |
285 | ravenscar_resume (struct target_ops *ops, ptid_t ptid, int step, | |
286 | enum gdb_signal siggnal) | |
287 | { | |
288 | struct target_ops *beneath = find_target_beneath (ops); | |
289 | ||
290 | inferior_ptid = base_ptid; | |
291 | beneath->to_resume (beneath, base_ptid, step, siggnal); | |
292 | } | |
293 | ||
294 | static ptid_t | |
295 | ravenscar_wait (struct target_ops *ops, ptid_t ptid, | |
296 | struct target_waitstatus *status, | |
297 | int options) | |
298 | { | |
299 | struct target_ops *beneath = find_target_beneath (ops); | |
300 | ptid_t event_ptid; | |
301 | ||
302 | inferior_ptid = base_ptid; | |
303 | event_ptid = beneath->to_wait (beneath, base_ptid, status, 0); | |
304 | /* Find any new threads that might have been created, and update | |
305 | inferior_ptid to the active thread. | |
306 | ||
307 | Only do it if the program is still alive, though. Otherwise, | |
308 | this causes problems when debugging through the remote protocol, | |
309 | because we might try switching threads (and thus sending packets) | |
310 | after the remote has disconnected. */ | |
311 | if (status->kind != TARGET_WAITKIND_EXITED | |
312 | && status->kind != TARGET_WAITKIND_SIGNALLED) | |
313 | { | |
314 | inferior_ptid = event_ptid; | |
315 | ravenscar_update_thread_list (ops); | |
316 | ravenscar_update_inferior_ptid (); | |
317 | } | |
318 | return inferior_ptid; | |
319 | } | |
320 | ||
321 | /* Add the thread associated to the given TASK to the thread list | |
322 | (if the thread has already been added, this is a no-op). */ | |
323 | ||
324 | static void | |
325 | ravenscar_add_thread (struct ada_task_info *task) | |
326 | { | |
327 | if (find_thread_ptid (task->ptid) == NULL) | |
328 | add_thread (task->ptid); | |
329 | } | |
330 | ||
331 | static void | |
332 | ravenscar_update_thread_list (struct target_ops *ops) | |
333 | { | |
334 | ada_build_task_list (); | |
335 | ||
336 | /* Do not clear the thread list before adding the Ada task, to keep | |
337 | the thread that the process stratum has included into it | |
338 | (base_ptid) and the running thread, that may not have been included | |
339 | to system.tasking.debug's list yet. */ | |
340 | ||
341 | iterate_over_live_ada_tasks (ravenscar_add_thread); | |
342 | } | |
343 | ||
344 | static ptid_t | |
345 | ravenscar_active_task (int cpu) | |
346 | { | |
347 | CORE_ADDR tid = get_running_thread_id (cpu); | |
348 | ||
349 | if (tid == 0) | |
350 | return null_ptid; | |
351 | else | |
352 | return ptid_build (ptid_get_pid (base_ptid), 0, tid); | |
353 | } | |
354 | ||
355 | static const char * | |
356 | ravenscar_extra_thread_info (struct target_ops *self, struct thread_info *tp) | |
357 | { | |
358 | return "Ravenscar task"; | |
359 | } | |
360 | ||
361 | static int | |
362 | ravenscar_thread_alive (struct target_ops *ops, ptid_t ptid) | |
363 | { | |
364 | /* Ravenscar tasks are non-terminating. */ | |
365 | return 1; | |
366 | } | |
367 | ||
368 | static const char * | |
369 | ravenscar_pid_to_str (struct target_ops *ops, ptid_t ptid) | |
370 | { | |
371 | static char buf[30]; | |
372 | ||
373 | snprintf (buf, sizeof (buf), "Thread %#x", (int) ptid_get_tid (ptid)); | |
374 | return buf; | |
375 | } | |
376 | ||
377 | static void | |
378 | ravenscar_fetch_registers (struct target_ops *ops, | |
379 | struct regcache *regcache, int regnum) | |
380 | { | |
381 | struct target_ops *beneath = find_target_beneath (ops); | |
382 | ptid_t ptid = regcache_get_ptid (regcache); | |
383 | ||
384 | if (ravenscar_runtime_initialized () | |
385 | && is_ravenscar_task (ptid) | |
386 | && !ravenscar_task_is_currently_active (ptid)) | |
387 | { | |
388 | struct gdbarch *gdbarch = regcache->arch (); | |
389 | struct ravenscar_arch_ops *arch_ops | |
390 | = gdbarch_ravenscar_ops (gdbarch); | |
391 | ||
392 | arch_ops->to_fetch_registers (regcache, regnum); | |
393 | } | |
394 | else | |
395 | beneath->to_fetch_registers (beneath, regcache, regnum); | |
396 | } | |
397 | ||
398 | static void | |
399 | ravenscar_store_registers (struct target_ops *ops, | |
400 | struct regcache *regcache, int regnum) | |
401 | { | |
402 | struct target_ops *beneath = find_target_beneath (ops); | |
403 | ptid_t ptid = regcache_get_ptid (regcache); | |
404 | ||
405 | if (ravenscar_runtime_initialized () | |
406 | && is_ravenscar_task (ptid) | |
407 | && !ravenscar_task_is_currently_active (ptid)) | |
408 | { | |
409 | struct gdbarch *gdbarch = regcache->arch (); | |
410 | struct ravenscar_arch_ops *arch_ops | |
411 | = gdbarch_ravenscar_ops (gdbarch); | |
412 | ||
413 | arch_ops->to_store_registers (regcache, regnum); | |
414 | } | |
415 | else | |
416 | beneath->to_store_registers (beneath, regcache, regnum); | |
417 | } | |
418 | ||
419 | static void | |
420 | ravenscar_prepare_to_store (struct target_ops *self, | |
421 | struct regcache *regcache) | |
422 | { | |
423 | struct target_ops *beneath = find_target_beneath (self); | |
424 | ptid_t ptid = regcache_get_ptid (regcache); | |
425 | ||
426 | if (ravenscar_runtime_initialized () | |
427 | && is_ravenscar_task (ptid) | |
428 | && !ravenscar_task_is_currently_active (ptid)) | |
429 | { | |
430 | struct gdbarch *gdbarch = regcache->arch (); | |
431 | struct ravenscar_arch_ops *arch_ops | |
432 | = gdbarch_ravenscar_ops (gdbarch); | |
433 | ||
434 | arch_ops->to_prepare_to_store (regcache); | |
435 | } | |
436 | else | |
437 | beneath->to_prepare_to_store (beneath, regcache); | |
438 | } | |
439 | ||
440 | /* Implement the to_stopped_by_sw_breakpoint target_ops "method". */ | |
441 | ||
442 | static int | |
443 | ravenscar_stopped_by_sw_breakpoint (struct target_ops *ops) | |
444 | { | |
445 | ptid_t saved_ptid = inferior_ptid; | |
446 | struct target_ops *beneath = find_target_beneath (ops); | |
447 | int result; | |
448 | ||
449 | inferior_ptid = get_base_thread_from_ravenscar_task (saved_ptid); | |
450 | result = beneath->to_stopped_by_sw_breakpoint (beneath); | |
451 | inferior_ptid = saved_ptid; | |
452 | return result; | |
453 | } | |
454 | ||
455 | /* Implement the to_stopped_by_hw_breakpoint target_ops "method". */ | |
456 | ||
457 | static int | |
458 | ravenscar_stopped_by_hw_breakpoint (struct target_ops *ops) | |
459 | { | |
460 | ptid_t saved_ptid = inferior_ptid; | |
461 | struct target_ops *beneath = find_target_beneath (ops); | |
462 | int result; | |
463 | ||
464 | inferior_ptid = get_base_thread_from_ravenscar_task (saved_ptid); | |
465 | result = beneath->to_stopped_by_hw_breakpoint (beneath); | |
466 | inferior_ptid = saved_ptid; | |
467 | return result; | |
468 | } | |
469 | ||
470 | /* Implement the to_stopped_by_watchpoint target_ops "method". */ | |
471 | ||
472 | static int | |
473 | ravenscar_stopped_by_watchpoint (struct target_ops *ops) | |
474 | { | |
475 | ptid_t saved_ptid = inferior_ptid; | |
476 | struct target_ops *beneath = find_target_beneath (ops); | |
477 | int result; | |
478 | ||
479 | inferior_ptid = get_base_thread_from_ravenscar_task (saved_ptid); | |
480 | result = beneath->to_stopped_by_watchpoint (beneath); | |
481 | inferior_ptid = saved_ptid; | |
482 | return result; | |
483 | } | |
484 | ||
485 | /* Implement the to_stopped_data_address target_ops "method". */ | |
486 | ||
487 | static int | |
488 | ravenscar_stopped_data_address (struct target_ops *ops, CORE_ADDR *addr_p) | |
489 | { | |
490 | ptid_t saved_ptid = inferior_ptid; | |
491 | struct target_ops *beneath = find_target_beneath (ops); | |
492 | int result; | |
493 | ||
494 | inferior_ptid = get_base_thread_from_ravenscar_task (saved_ptid); | |
495 | result = beneath->to_stopped_data_address (beneath, addr_p); | |
496 | inferior_ptid = saved_ptid; | |
497 | return result; | |
498 | } | |
499 | ||
500 | static void | |
501 | ravenscar_mourn_inferior (struct target_ops *ops) | |
502 | { | |
503 | struct target_ops *beneath = find_target_beneath (ops); | |
504 | ||
505 | base_ptid = null_ptid; | |
506 | beneath->to_mourn_inferior (beneath); | |
507 | unpush_target (&ravenscar_ops); | |
508 | } | |
509 | ||
510 | /* Implement the to_core_of_thread target_ops "method". */ | |
511 | ||
512 | static int | |
513 | ravenscar_core_of_thread (struct target_ops *ops, ptid_t ptid) | |
514 | { | |
515 | ptid_t saved_ptid = inferior_ptid; | |
516 | struct target_ops *beneath = find_target_beneath (ops); | |
517 | int result; | |
518 | ||
519 | inferior_ptid = get_base_thread_from_ravenscar_task (saved_ptid); | |
520 | result = beneath->to_core_of_thread (beneath, inferior_ptid); | |
521 | inferior_ptid = saved_ptid; | |
522 | return result; | |
523 | } | |
524 | ||
525 | /* Observer on inferior_created: push ravenscar thread stratum if needed. */ | |
526 | ||
527 | static void | |
528 | ravenscar_inferior_created (struct target_ops *target, int from_tty) | |
529 | { | |
530 | const char *err_msg; | |
531 | ||
532 | if (!ravenscar_task_support | |
533 | || gdbarch_ravenscar_ops (target_gdbarch ()) == NULL | |
534 | || !has_ravenscar_runtime ()) | |
535 | return; | |
536 | ||
537 | err_msg = ada_get_tcb_types_info (); | |
538 | if (err_msg != NULL) | |
539 | { | |
540 | warning (_("%s. Task/thread support disabled."), err_msg); | |
541 | return; | |
542 | } | |
543 | ||
544 | ravenscar_update_inferior_ptid (); | |
545 | push_target (&ravenscar_ops); | |
546 | } | |
547 | ||
548 | static ptid_t | |
549 | ravenscar_get_ada_task_ptid (struct target_ops *self, long lwp, long thread) | |
550 | { | |
551 | return ptid_build (ptid_get_pid (base_ptid), 0, thread); | |
552 | } | |
553 | ||
554 | static void | |
555 | init_ravenscar_thread_ops (void) | |
556 | { | |
557 | ravenscar_ops.to_shortname = "ravenscar"; | |
558 | ravenscar_ops.to_longname = "Ravenscar tasks."; | |
559 | ravenscar_ops.to_doc = "Ravenscar tasks support."; | |
560 | ravenscar_ops.to_resume = ravenscar_resume; | |
561 | ravenscar_ops.to_wait = ravenscar_wait; | |
562 | ravenscar_ops.to_fetch_registers = ravenscar_fetch_registers; | |
563 | ravenscar_ops.to_store_registers = ravenscar_store_registers; | |
564 | ravenscar_ops.to_prepare_to_store = ravenscar_prepare_to_store; | |
565 | ravenscar_ops.to_stopped_by_sw_breakpoint | |
566 | = ravenscar_stopped_by_sw_breakpoint; | |
567 | ravenscar_ops.to_stopped_by_hw_breakpoint | |
568 | = ravenscar_stopped_by_hw_breakpoint; | |
569 | ravenscar_ops.to_stopped_by_watchpoint = ravenscar_stopped_by_watchpoint; | |
570 | ravenscar_ops.to_stopped_data_address = ravenscar_stopped_data_address; | |
571 | ravenscar_ops.to_thread_alive = ravenscar_thread_alive; | |
572 | ravenscar_ops.to_update_thread_list = ravenscar_update_thread_list; | |
573 | ravenscar_ops.to_pid_to_str = ravenscar_pid_to_str; | |
574 | ravenscar_ops.to_extra_thread_info = ravenscar_extra_thread_info; | |
575 | ravenscar_ops.to_get_ada_task_ptid = ravenscar_get_ada_task_ptid; | |
576 | ravenscar_ops.to_mourn_inferior = ravenscar_mourn_inferior; | |
577 | ravenscar_ops.to_has_all_memory = default_child_has_all_memory; | |
578 | ravenscar_ops.to_has_memory = default_child_has_memory; | |
579 | ravenscar_ops.to_has_stack = default_child_has_stack; | |
580 | ravenscar_ops.to_has_registers = default_child_has_registers; | |
581 | ravenscar_ops.to_has_execution = default_child_has_execution; | |
582 | ravenscar_ops.to_stratum = thread_stratum; | |
583 | ravenscar_ops.to_core_of_thread = ravenscar_core_of_thread; | |
584 | ravenscar_ops.to_magic = OPS_MAGIC; | |
585 | } | |
586 | ||
587 | /* Command-list for the "set/show ravenscar" prefix command. */ | |
588 | static struct cmd_list_element *set_ravenscar_list; | |
589 | static struct cmd_list_element *show_ravenscar_list; | |
590 | ||
591 | /* Implement the "set ravenscar" prefix command. */ | |
592 | ||
593 | static void | |
594 | set_ravenscar_command (const char *arg, int from_tty) | |
595 | { | |
596 | printf_unfiltered (_(\ | |
597 | "\"set ravenscar\" must be followed by the name of a setting.\n")); | |
598 | help_list (set_ravenscar_list, "set ravenscar ", all_commands, gdb_stdout); | |
599 | } | |
600 | ||
601 | /* Implement the "show ravenscar" prefix command. */ | |
602 | ||
603 | static void | |
604 | show_ravenscar_command (const char *args, int from_tty) | |
605 | { | |
606 | cmd_show_list (show_ravenscar_list, from_tty, ""); | |
607 | } | |
608 | ||
609 | /* Implement the "show ravenscar task-switching" command. */ | |
610 | ||
611 | static void | |
612 | show_ravenscar_task_switching_command (struct ui_file *file, int from_tty, | |
613 | struct cmd_list_element *c, | |
614 | const char *value) | |
615 | { | |
616 | if (ravenscar_task_support) | |
617 | fprintf_filtered (file, _("\ | |
618 | Support for Ravenscar task/thread switching is enabled\n")); | |
619 | else | |
620 | fprintf_filtered (file, _("\ | |
621 | Support for Ravenscar task/thread switching is disabled\n")); | |
622 | } | |
623 | ||
624 | /* Module startup initialization function, automagically called by | |
625 | init.c. */ | |
626 | ||
627 | void | |
628 | _initialize_ravenscar (void) | |
629 | { | |
630 | init_ravenscar_thread_ops (); | |
631 | base_ptid = null_ptid; | |
632 | ||
633 | /* Notice when the inferior is created in order to push the | |
634 | ravenscar ops if needed. */ | |
635 | gdb::observers::inferior_created.attach (ravenscar_inferior_created); | |
636 | ||
637 | complete_target_initialization (&ravenscar_ops); | |
638 | ||
639 | add_prefix_cmd ("ravenscar", no_class, set_ravenscar_command, | |
640 | _("Prefix command for changing Ravenscar-specific settings"), | |
641 | &set_ravenscar_list, "set ravenscar ", 0, &setlist); | |
642 | ||
643 | add_prefix_cmd ("ravenscar", no_class, show_ravenscar_command, | |
644 | _("Prefix command for showing Ravenscar-specific settings"), | |
645 | &show_ravenscar_list, "show ravenscar ", 0, &showlist); | |
646 | ||
647 | add_setshow_boolean_cmd ("task-switching", class_obscure, | |
648 | &ravenscar_task_support, _("\ | |
649 | Enable or disable support for GNAT Ravenscar tasks"), _("\ | |
650 | Show whether support for GNAT Ravenscar tasks is enabled"), | |
651 | _("\ | |
652 | Enable or disable support for task/thread switching with the GNAT\n\ | |
653 | Ravenscar run-time library for bareboard configuration."), | |
654 | NULL, show_ravenscar_task_switching_command, | |
655 | &set_ravenscar_list, &show_ravenscar_list); | |
656 | } |