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611cb4a5 | 1 | /* Memory breakpoint operations for the remote server for GDB. |
0b302171 JB |
2 | Copyright (C) 2002-2003, 2005, 2007-2012 Free Software Foundation, |
3 | Inc. | |
611cb4a5 DJ |
4 | |
5 | Contributed by MontaVista Software. | |
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 | |
a9762ec7 | 11 | the Free Software Foundation; either version 3 of the License, or |
611cb4a5 DJ |
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 | |
a9762ec7 | 20 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
611cb4a5 DJ |
21 | |
22 | #include "server.h" | |
9f3a5c85 LM |
23 | #include "regcache.h" |
24 | #include "ax.h" | |
611cb4a5 | 25 | |
f450004a | 26 | const unsigned char *breakpoint_data; |
611cb4a5 DJ |
27 | int breakpoint_len; |
28 | ||
29 | #define MAX_BREAKPOINT_LEN 8 | |
30 | ||
8b07ae33 PA |
31 | /* GDB will never try to install multiple breakpoints at the same |
32 | address. But, we need to keep track of internal breakpoints too, | |
33 | and so we do need to be able to install multiple breakpoints at the | |
34 | same address transparently. We keep track of two different, and | |
35 | closely related structures. A raw breakpoint, which manages the | |
36 | low level, close to the metal aspect of a breakpoint. It holds the | |
37 | breakpoint address, and a buffer holding a copy of the instructions | |
38 | that would be in memory had not been a breakpoint there (we call | |
39 | that the shadow memory of the breakpoint). We occasionally need to | |
40 | temporarilly uninsert a breakpoint without the client knowing about | |
41 | it (e.g., to step over an internal breakpoint), so we keep an | |
42 | `inserted' state associated with this low level breakpoint | |
43 | structure. There can only be one such object for a given address. | |
44 | Then, we have (a bit higher level) breakpoints. This structure | |
45 | holds a callback to be called whenever a breakpoint is hit, a | |
46 | high-level type, and a link to a low level raw breakpoint. There | |
47 | can be many high-level breakpoints at the same address, and all of | |
48 | them will point to the same raw breakpoint, which is reference | |
49 | counted. */ | |
50 | ||
51 | /* The low level, physical, raw breakpoint. */ | |
52 | struct raw_breakpoint | |
53 | { | |
54 | struct raw_breakpoint *next; | |
55 | ||
56 | /* A reference count. Each high level breakpoint referencing this | |
57 | raw breakpoint accounts for one reference. */ | |
58 | int refcount; | |
59 | ||
60 | /* The breakpoint's insertion address. There can only be one raw | |
61 | breakpoint for a given PC. */ | |
62 | CORE_ADDR pc; | |
63 | ||
64 | /* The breakpoint's shadow memory. */ | |
65 | unsigned char old_data[MAX_BREAKPOINT_LEN]; | |
66 | ||
67 | /* Non-zero if this breakpoint is currently inserted in the | |
68 | inferior. */ | |
69 | int inserted; | |
d3bbe7a0 PA |
70 | |
71 | /* Non-zero if this breakpoint is currently disabled because we no | |
72 | longer detect it as inserted. */ | |
73 | int shlib_disabled; | |
8b07ae33 PA |
74 | }; |
75 | ||
414a389f PA |
76 | /* The type of a breakpoint. */ |
77 | enum bkpt_type | |
78 | { | |
8b07ae33 PA |
79 | /* A GDB breakpoint, requested with a Z0 packet. */ |
80 | gdb_breakpoint, | |
81 | ||
414a389f PA |
82 | /* A basic-software-single-step breakpoint. */ |
83 | reinsert_breakpoint, | |
84 | ||
85 | /* Any other breakpoint type that doesn't require specific | |
86 | treatment goes here. E.g., an event breakpoint. */ | |
87 | other_breakpoint, | |
88 | }; | |
89 | ||
9f3a5c85 LM |
90 | struct point_cond_list |
91 | { | |
92 | /* Pointer to the agent expression that is the breakpoint's | |
93 | conditional. */ | |
94 | struct agent_expr *cond; | |
95 | ||
96 | /* Pointer to the next condition. */ | |
97 | struct point_cond_list *next; | |
98 | }; | |
99 | ||
8b07ae33 | 100 | /* A high level (in gdbserver's perspective) breakpoint. */ |
611cb4a5 DJ |
101 | struct breakpoint |
102 | { | |
103 | struct breakpoint *next; | |
611cb4a5 | 104 | |
414a389f PA |
105 | /* The breakpoint's type. */ |
106 | enum bkpt_type type; | |
107 | ||
9f3a5c85 LM |
108 | /* Pointer to the condition list that should be evaluated on |
109 | the target or NULL if the breakpoint is unconditional or | |
110 | if GDB doesn't want us to evaluate the conditionals on the | |
111 | target's side. */ | |
112 | struct point_cond_list *cond_list; | |
113 | ||
8b07ae33 PA |
114 | /* Link to this breakpoint's raw breakpoint. This is always |
115 | non-NULL. */ | |
116 | struct raw_breakpoint *raw; | |
117 | ||
b65d95c5 | 118 | /* Function to call when we hit this breakpoint. If it returns 1, |
8b07ae33 PA |
119 | the breakpoint shall be deleted; 0 or if this callback is NULL, |
120 | it will be left inserted. */ | |
b65d95c5 | 121 | int (*handler) (CORE_ADDR); |
611cb4a5 DJ |
122 | }; |
123 | ||
8b07ae33 PA |
124 | static struct raw_breakpoint * |
125 | find_raw_breakpoint_at (CORE_ADDR where) | |
126 | { | |
127 | struct process_info *proc = current_process (); | |
128 | struct raw_breakpoint *bp; | |
414a389f | 129 | |
8b07ae33 PA |
130 | for (bp = proc->raw_breakpoints; bp != NULL; bp = bp->next) |
131 | if (bp->pc == where) | |
132 | return bp; | |
133 | ||
134 | return NULL; | |
135 | } | |
136 | ||
137 | static struct raw_breakpoint * | |
d50171e4 | 138 | set_raw_breakpoint_at (CORE_ADDR where) |
611cb4a5 | 139 | { |
95954743 | 140 | struct process_info *proc = current_process (); |
8b07ae33 | 141 | struct raw_breakpoint *bp; |
d50171e4 | 142 | int err; |
6bf36717 | 143 | unsigned char buf[MAX_BREAKPOINT_LEN]; |
611cb4a5 DJ |
144 | |
145 | if (breakpoint_data == NULL) | |
146 | error ("Target does not support breakpoints."); | |
147 | ||
8b07ae33 PA |
148 | bp = find_raw_breakpoint_at (where); |
149 | if (bp != NULL) | |
150 | { | |
151 | bp->refcount++; | |
152 | return bp; | |
153 | } | |
154 | ||
d50171e4 PA |
155 | bp = xcalloc (1, sizeof (*bp)); |
156 | bp->pc = where; | |
8b07ae33 | 157 | bp->refcount = 1; |
611cb4a5 | 158 | |
fa593d66 PA |
159 | /* Note that there can be fast tracepoint jumps installed in the |
160 | same memory range, so to get at the original memory, we need to | |
161 | use read_inferior_memory, which masks those out. */ | |
6bf36717 | 162 | err = read_inferior_memory (where, buf, breakpoint_len); |
d50171e4 PA |
163 | if (err != 0) |
164 | { | |
165 | if (debug_threads) | |
166 | fprintf (stderr, | |
167 | "Failed to read shadow memory of" | |
168 | " breakpoint at 0x%s (%s).\n", | |
169 | paddress (where), strerror (err)); | |
170 | free (bp); | |
171 | return NULL; | |
172 | } | |
6bf36717 | 173 | memcpy (bp->old_data, buf, breakpoint_len); |
611cb4a5 | 174 | |
d50171e4 PA |
175 | err = (*the_target->write_memory) (where, breakpoint_data, |
176 | breakpoint_len); | |
177 | if (err != 0) | |
178 | { | |
179 | if (debug_threads) | |
180 | fprintf (stderr, | |
181 | "Failed to insert breakpoint at 0x%s (%s).\n", | |
182 | paddress (where), strerror (err)); | |
183 | free (bp); | |
184 | return NULL; | |
185 | } | |
186 | ||
187 | /* Link the breakpoint in. */ | |
188 | bp->inserted = 1; | |
8b07ae33 PA |
189 | bp->next = proc->raw_breakpoints; |
190 | proc->raw_breakpoints = bp; | |
d50171e4 PA |
191 | return bp; |
192 | } | |
193 | ||
fa593d66 PA |
194 | /* Notice that breakpoint traps are always installed on top of fast |
195 | tracepoint jumps. This is even if the fast tracepoint is installed | |
196 | at a later time compared to when the breakpoint was installed. | |
197 | This means that a stopping breakpoint or tracepoint has higher | |
198 | "priority". In turn, this allows having fast and slow tracepoints | |
199 | (and breakpoints) at the same address behave correctly. */ | |
200 | ||
201 | ||
202 | /* A fast tracepoint jump. */ | |
203 | ||
204 | struct fast_tracepoint_jump | |
205 | { | |
206 | struct fast_tracepoint_jump *next; | |
207 | ||
208 | /* A reference count. GDB can install more than one fast tracepoint | |
209 | at the same address (each with its own action list, for | |
210 | example). */ | |
211 | int refcount; | |
212 | ||
213 | /* The fast tracepoint's insertion address. There can only be one | |
214 | of these for a given PC. */ | |
215 | CORE_ADDR pc; | |
216 | ||
217 | /* Non-zero if this fast tracepoint jump is currently inserted in | |
218 | the inferior. */ | |
219 | int inserted; | |
220 | ||
221 | /* The length of the jump instruction. */ | |
222 | int length; | |
223 | ||
224 | /* A poor-man's flexible array member, holding both the jump | |
225 | instruction to insert, and a copy of the instruction that would | |
226 | be in memory had not been a jump there (the shadow memory of the | |
227 | tracepoint jump). */ | |
228 | unsigned char insn_and_shadow[0]; | |
229 | }; | |
230 | ||
231 | /* Fast tracepoint FP's jump instruction to insert. */ | |
232 | #define fast_tracepoint_jump_insn(fp) \ | |
233 | ((fp)->insn_and_shadow + 0) | |
234 | ||
235 | /* The shadow memory of fast tracepoint jump FP. */ | |
236 | #define fast_tracepoint_jump_shadow(fp) \ | |
237 | ((fp)->insn_and_shadow + (fp)->length) | |
238 | ||
239 | ||
240 | /* Return the fast tracepoint jump set at WHERE. */ | |
241 | ||
242 | static struct fast_tracepoint_jump * | |
243 | find_fast_tracepoint_jump_at (CORE_ADDR where) | |
244 | { | |
245 | struct process_info *proc = current_process (); | |
246 | struct fast_tracepoint_jump *jp; | |
247 | ||
248 | for (jp = proc->fast_tracepoint_jumps; jp != NULL; jp = jp->next) | |
249 | if (jp->pc == where) | |
250 | return jp; | |
251 | ||
252 | return NULL; | |
253 | } | |
254 | ||
255 | int | |
256 | fast_tracepoint_jump_here (CORE_ADDR where) | |
257 | { | |
258 | struct fast_tracepoint_jump *jp = find_fast_tracepoint_jump_at (where); | |
259 | ||
260 | return (jp != NULL); | |
261 | } | |
262 | ||
263 | int | |
264 | delete_fast_tracepoint_jump (struct fast_tracepoint_jump *todel) | |
265 | { | |
266 | struct fast_tracepoint_jump *bp, **bp_link; | |
267 | int ret; | |
268 | struct process_info *proc = current_process (); | |
269 | ||
270 | bp = proc->fast_tracepoint_jumps; | |
271 | bp_link = &proc->fast_tracepoint_jumps; | |
272 | ||
273 | while (bp) | |
274 | { | |
275 | if (bp == todel) | |
276 | { | |
277 | if (--bp->refcount == 0) | |
278 | { | |
279 | struct fast_tracepoint_jump *prev_bp_link = *bp_link; | |
6bf36717 | 280 | unsigned char *buf; |
fa593d66 PA |
281 | |
282 | /* Unlink it. */ | |
283 | *bp_link = bp->next; | |
284 | ||
285 | /* Since there can be breakpoints inserted in the same | |
286 | address range, we use `write_inferior_memory', which | |
287 | takes care of layering breakpoints on top of fast | |
288 | tracepoints, and on top of the buffer we pass it. | |
289 | This works because we've already unlinked the fast | |
290 | tracepoint jump above. Also note that we need to | |
291 | pass the current shadow contents, because | |
292 | write_inferior_memory updates any shadow memory with | |
293 | what we pass here, and we want that to be a nop. */ | |
6bf36717 JK |
294 | buf = alloca (bp->length); |
295 | memcpy (buf, fast_tracepoint_jump_shadow (bp), bp->length); | |
296 | ret = write_inferior_memory (bp->pc, buf, bp->length); | |
fa593d66 PA |
297 | if (ret != 0) |
298 | { | |
299 | /* Something went wrong, relink the jump. */ | |
300 | *bp_link = prev_bp_link; | |
301 | ||
302 | if (debug_threads) | |
303 | fprintf (stderr, | |
304 | "Failed to uninsert fast tracepoint jump " | |
305 | "at 0x%s (%s) while deleting it.\n", | |
306 | paddress (bp->pc), strerror (ret)); | |
307 | return ret; | |
308 | } | |
309 | ||
310 | free (bp); | |
311 | } | |
312 | ||
313 | return 0; | |
314 | } | |
315 | else | |
316 | { | |
317 | bp_link = &bp->next; | |
318 | bp = *bp_link; | |
319 | } | |
320 | } | |
321 | ||
322 | warning ("Could not find fast tracepoint jump in list."); | |
323 | return ENOENT; | |
324 | } | |
325 | ||
5c73ff4e YQ |
326 | void |
327 | inc_ref_fast_tracepoint_jump (struct fast_tracepoint_jump *jp) | |
328 | { | |
329 | jp->refcount++; | |
330 | } | |
331 | ||
fa593d66 PA |
332 | struct fast_tracepoint_jump * |
333 | set_fast_tracepoint_jump (CORE_ADDR where, | |
334 | unsigned char *insn, ULONGEST length) | |
335 | { | |
336 | struct process_info *proc = current_process (); | |
337 | struct fast_tracepoint_jump *jp; | |
338 | int err; | |
6bf36717 | 339 | unsigned char *buf; |
fa593d66 PA |
340 | |
341 | /* We refcount fast tracepoint jumps. Check if we already know | |
342 | about a jump at this address. */ | |
343 | jp = find_fast_tracepoint_jump_at (where); | |
344 | if (jp != NULL) | |
345 | { | |
346 | jp->refcount++; | |
347 | return jp; | |
348 | } | |
349 | ||
350 | /* We don't, so create a new object. Double the length, because the | |
351 | flexible array member holds both the jump insn, and the | |
352 | shadow. */ | |
353 | jp = xcalloc (1, sizeof (*jp) + (length * 2)); | |
354 | jp->pc = where; | |
355 | jp->length = length; | |
356 | memcpy (fast_tracepoint_jump_insn (jp), insn, length); | |
357 | jp->refcount = 1; | |
6bf36717 | 358 | buf = alloca (length); |
fa593d66 PA |
359 | |
360 | /* Note that there can be trap breakpoints inserted in the same | |
361 | address range. To access the original memory contents, we use | |
362 | `read_inferior_memory', which masks out breakpoints. */ | |
6bf36717 | 363 | err = read_inferior_memory (where, buf, length); |
fa593d66 PA |
364 | if (err != 0) |
365 | { | |
366 | if (debug_threads) | |
367 | fprintf (stderr, | |
368 | "Failed to read shadow memory of" | |
369 | " fast tracepoint at 0x%s (%s).\n", | |
370 | paddress (where), strerror (err)); | |
371 | free (jp); | |
372 | return NULL; | |
373 | } | |
6bf36717 | 374 | memcpy (fast_tracepoint_jump_shadow (jp), buf, length); |
fa593d66 PA |
375 | |
376 | /* Link the jump in. */ | |
377 | jp->inserted = 1; | |
378 | jp->next = proc->fast_tracepoint_jumps; | |
379 | proc->fast_tracepoint_jumps = jp; | |
380 | ||
381 | /* Since there can be trap breakpoints inserted in the same address | |
382 | range, we use use `write_inferior_memory', which takes care of | |
383 | layering breakpoints on top of fast tracepoints, on top of the | |
384 | buffer we pass it. This works because we've already linked in | |
385 | the fast tracepoint jump above. Also note that we need to pass | |
386 | the current shadow contents, because write_inferior_memory | |
387 | updates any shadow memory with what we pass here, and we want | |
388 | that to be a nop. */ | |
6bf36717 | 389 | err = write_inferior_memory (where, buf, length); |
fa593d66 PA |
390 | if (err != 0) |
391 | { | |
392 | if (debug_threads) | |
393 | fprintf (stderr, | |
394 | "Failed to insert fast tracepoint jump at 0x%s (%s).\n", | |
395 | paddress (where), strerror (err)); | |
396 | ||
397 | /* Unlink it. */ | |
398 | proc->fast_tracepoint_jumps = jp->next; | |
399 | free (jp); | |
400 | ||
401 | return NULL; | |
402 | } | |
403 | ||
404 | return jp; | |
405 | } | |
406 | ||
407 | void | |
408 | uninsert_fast_tracepoint_jumps_at (CORE_ADDR pc) | |
409 | { | |
410 | struct fast_tracepoint_jump *jp; | |
411 | int err; | |
412 | ||
413 | jp = find_fast_tracepoint_jump_at (pc); | |
414 | if (jp == NULL) | |
415 | { | |
416 | /* This can happen when we remove all breakpoints while handling | |
417 | a step-over. */ | |
418 | if (debug_threads) | |
419 | fprintf (stderr, | |
420 | "Could not find fast tracepoint jump at 0x%s " | |
421 | "in list (uninserting).\n", | |
422 | paddress (pc)); | |
423 | return; | |
424 | } | |
425 | ||
426 | if (jp->inserted) | |
427 | { | |
6bf36717 JK |
428 | unsigned char *buf; |
429 | ||
fa593d66 PA |
430 | jp->inserted = 0; |
431 | ||
432 | /* Since there can be trap breakpoints inserted in the same | |
433 | address range, we use use `write_inferior_memory', which | |
434 | takes care of layering breakpoints on top of fast | |
435 | tracepoints, and on top of the buffer we pass it. This works | |
436 | because we've already marked the fast tracepoint fast | |
437 | tracepoint jump uninserted above. Also note that we need to | |
438 | pass the current shadow contents, because | |
439 | write_inferior_memory updates any shadow memory with what we | |
440 | pass here, and we want that to be a nop. */ | |
6bf36717 JK |
441 | buf = alloca (jp->length); |
442 | memcpy (buf, fast_tracepoint_jump_shadow (jp), jp->length); | |
443 | err = write_inferior_memory (jp->pc, buf, jp->length); | |
fa593d66 PA |
444 | if (err != 0) |
445 | { | |
446 | jp->inserted = 1; | |
447 | ||
448 | if (debug_threads) | |
449 | fprintf (stderr, | |
450 | "Failed to uninsert fast tracepoint jump at 0x%s (%s).\n", | |
451 | paddress (pc), strerror (err)); | |
452 | } | |
453 | } | |
454 | } | |
455 | ||
456 | void | |
457 | reinsert_fast_tracepoint_jumps_at (CORE_ADDR where) | |
458 | { | |
459 | struct fast_tracepoint_jump *jp; | |
460 | int err; | |
6bf36717 | 461 | unsigned char *buf; |
fa593d66 PA |
462 | |
463 | jp = find_fast_tracepoint_jump_at (where); | |
464 | if (jp == NULL) | |
465 | { | |
466 | /* This can happen when we remove breakpoints when a tracepoint | |
467 | hit causes a tracing stop, while handling a step-over. */ | |
468 | if (debug_threads) | |
469 | fprintf (stderr, | |
470 | "Could not find fast tracepoint jump at 0x%s " | |
471 | "in list (reinserting).\n", | |
472 | paddress (where)); | |
473 | return; | |
474 | } | |
475 | ||
476 | if (jp->inserted) | |
477 | error ("Jump already inserted at reinsert time."); | |
478 | ||
479 | jp->inserted = 1; | |
480 | ||
481 | /* Since there can be trap breakpoints inserted in the same address | |
482 | range, we use `write_inferior_memory', which takes care of | |
483 | layering breakpoints on top of fast tracepoints, and on top of | |
484 | the buffer we pass it. This works because we've already marked | |
485 | the fast tracepoint jump inserted above. Also note that we need | |
486 | to pass the current shadow contents, because | |
487 | write_inferior_memory updates any shadow memory with what we pass | |
488 | here, and we want that to be a nop. */ | |
6bf36717 JK |
489 | buf = alloca (jp->length); |
490 | memcpy (buf, fast_tracepoint_jump_shadow (jp), jp->length); | |
491 | err = write_inferior_memory (where, buf, jp->length); | |
fa593d66 PA |
492 | if (err != 0) |
493 | { | |
494 | jp->inserted = 0; | |
495 | ||
496 | if (debug_threads) | |
497 | fprintf (stderr, | |
498 | "Failed to reinsert fast tracepoint jump at 0x%s (%s).\n", | |
499 | paddress (where), strerror (err)); | |
500 | } | |
501 | } | |
502 | ||
414a389f | 503 | struct breakpoint * |
d50171e4 PA |
504 | set_breakpoint_at (CORE_ADDR where, int (*handler) (CORE_ADDR)) |
505 | { | |
506 | struct process_info *proc = current_process (); | |
507 | struct breakpoint *bp; | |
8b07ae33 | 508 | struct raw_breakpoint *raw; |
d50171e4 | 509 | |
8b07ae33 | 510 | raw = set_raw_breakpoint_at (where); |
d50171e4 | 511 | |
8b07ae33 | 512 | if (raw == NULL) |
d50171e4 PA |
513 | { |
514 | /* warn? */ | |
414a389f | 515 | return NULL; |
d50171e4 PA |
516 | } |
517 | ||
518 | bp = xcalloc (1, sizeof (struct breakpoint)); | |
414a389f | 519 | bp->type = other_breakpoint; |
8b07ae33 PA |
520 | |
521 | bp->raw = raw; | |
611cb4a5 DJ |
522 | bp->handler = handler; |
523 | ||
95954743 PA |
524 | bp->next = proc->breakpoints; |
525 | proc->breakpoints = bp; | |
414a389f PA |
526 | |
527 | return bp; | |
611cb4a5 DJ |
528 | } |
529 | ||
8b07ae33 PA |
530 | static int |
531 | delete_raw_breakpoint (struct process_info *proc, struct raw_breakpoint *todel) | |
532 | { | |
533 | struct raw_breakpoint *bp, **bp_link; | |
534 | int ret; | |
535 | ||
536 | bp = proc->raw_breakpoints; | |
537 | bp_link = &proc->raw_breakpoints; | |
538 | ||
539 | while (bp) | |
540 | { | |
541 | if (bp == todel) | |
542 | { | |
543 | if (bp->inserted) | |
544 | { | |
545 | struct raw_breakpoint *prev_bp_link = *bp_link; | |
6bf36717 | 546 | unsigned char buf[MAX_BREAKPOINT_LEN]; |
8b07ae33 PA |
547 | |
548 | *bp_link = bp->next; | |
549 | ||
fa593d66 PA |
550 | /* Since there can be trap breakpoints inserted in the |
551 | same address range, we use `write_inferior_memory', | |
552 | which takes care of layering breakpoints on top of | |
553 | fast tracepoints, and on top of the buffer we pass | |
554 | it. This works because we've already unlinked the | |
555 | fast tracepoint jump above. Also note that we need | |
556 | to pass the current shadow contents, because | |
557 | write_inferior_memory updates any shadow memory with | |
558 | what we pass here, and we want that to be a nop. */ | |
6bf36717 JK |
559 | memcpy (buf, bp->old_data, breakpoint_len); |
560 | ret = write_inferior_memory (bp->pc, buf, breakpoint_len); | |
8b07ae33 PA |
561 | if (ret != 0) |
562 | { | |
563 | /* Something went wrong, relink the breakpoint. */ | |
564 | *bp_link = prev_bp_link; | |
565 | ||
566 | if (debug_threads) | |
567 | fprintf (stderr, | |
568 | "Failed to uninsert raw breakpoint " | |
569 | "at 0x%s (%s) while deleting it.\n", | |
570 | paddress (bp->pc), strerror (ret)); | |
571 | return ret; | |
572 | } | |
573 | ||
574 | } | |
575 | else | |
576 | *bp_link = bp->next; | |
577 | ||
578 | free (bp); | |
579 | return 0; | |
580 | } | |
581 | else | |
582 | { | |
583 | bp_link = &bp->next; | |
584 | bp = *bp_link; | |
585 | } | |
586 | } | |
587 | ||
588 | warning ("Could not find raw breakpoint in list."); | |
589 | return ENOENT; | |
590 | } | |
591 | ||
592 | static int | |
593 | release_breakpoint (struct process_info *proc, struct breakpoint *bp) | |
594 | { | |
595 | int newrefcount; | |
596 | int ret; | |
597 | ||
598 | newrefcount = bp->raw->refcount - 1; | |
599 | if (newrefcount == 0) | |
600 | { | |
601 | ret = delete_raw_breakpoint (proc, bp->raw); | |
602 | if (ret != 0) | |
603 | return ret; | |
604 | } | |
605 | else | |
606 | bp->raw->refcount = newrefcount; | |
607 | ||
608 | free (bp); | |
609 | ||
610 | return 0; | |
611 | } | |
612 | ||
613 | static int | |
614 | delete_breakpoint_1 (struct process_info *proc, struct breakpoint *todel) | |
611cb4a5 | 615 | { |
414a389f | 616 | struct breakpoint *bp, **bp_link; |
8b07ae33 | 617 | int err; |
611cb4a5 | 618 | |
414a389f PA |
619 | bp = proc->breakpoints; |
620 | bp_link = &proc->breakpoints; | |
621 | ||
622 | while (bp) | |
611cb4a5 | 623 | { |
414a389f | 624 | if (bp == todel) |
611cb4a5 | 625 | { |
414a389f PA |
626 | *bp_link = bp->next; |
627 | ||
8b07ae33 PA |
628 | err = release_breakpoint (proc, bp); |
629 | if (err != 0) | |
630 | return err; | |
631 | ||
632 | bp = *bp_link; | |
633 | return 0; | |
611cb4a5 | 634 | } |
414a389f PA |
635 | else |
636 | { | |
637 | bp_link = &bp->next; | |
638 | bp = *bp_link; | |
639 | } | |
611cb4a5 | 640 | } |
414a389f | 641 | |
611cb4a5 | 642 | warning ("Could not find breakpoint in list."); |
8b07ae33 PA |
643 | return ENOENT; |
644 | } | |
645 | ||
219f2f23 | 646 | int |
8b07ae33 PA |
647 | delete_breakpoint (struct breakpoint *todel) |
648 | { | |
649 | struct process_info *proc = current_process (); | |
650 | return delete_breakpoint_1 (proc, todel); | |
611cb4a5 DJ |
651 | } |
652 | ||
9f3a5c85 | 653 | struct breakpoint * |
8b07ae33 | 654 | find_gdb_breakpoint_at (CORE_ADDR where) |
611cb4a5 | 655 | { |
95954743 | 656 | struct process_info *proc = current_process (); |
8b07ae33 | 657 | struct breakpoint *bp; |
611cb4a5 | 658 | |
8b07ae33 PA |
659 | for (bp = proc->breakpoints; bp != NULL; bp = bp->next) |
660 | if (bp->type == gdb_breakpoint && bp->raw->pc == where) | |
661 | return bp; | |
611cb4a5 DJ |
662 | |
663 | return NULL; | |
664 | } | |
665 | ||
8b07ae33 PA |
666 | int |
667 | set_gdb_breakpoint_at (CORE_ADDR where) | |
68070c10 | 668 | { |
8b07ae33 PA |
669 | struct breakpoint *bp; |
670 | ||
671 | if (breakpoint_data == NULL) | |
672 | return 1; | |
673 | ||
d3bbe7a0 PA |
674 | /* If we see GDB inserting a second breakpoint at the same address, |
675 | then the first breakpoint must have disappeared due to a shared | |
676 | library unload. On targets where the shared libraries are | |
677 | handled by userspace, like SVR4, for example, GDBserver can't | |
678 | tell if a library was loaded or unloaded. Since we refcount | |
679 | breakpoints, if we didn't do this, we'd just increase the | |
680 | refcount of the previous breakpoint at this address, but the trap | |
681 | was not planted in the inferior anymore, thus the breakpoint | |
682 | would never be hit. */ | |
683 | bp = find_gdb_breakpoint_at (where); | |
684 | if (bp != NULL) | |
685 | { | |
686 | delete_gdb_breakpoint_at (where); | |
687 | ||
688 | /* Might as well validate all other breakpoints. */ | |
689 | validate_breakpoints (); | |
690 | } | |
691 | ||
8b07ae33 PA |
692 | bp = set_breakpoint_at (where, NULL); |
693 | if (bp == NULL) | |
694 | return -1; | |
695 | ||
696 | bp->type = gdb_breakpoint; | |
697 | return 0; | |
698 | } | |
699 | ||
700 | int | |
701 | delete_gdb_breakpoint_at (CORE_ADDR addr) | |
702 | { | |
703 | struct breakpoint *bp; | |
704 | int err; | |
705 | ||
706 | if (breakpoint_data == NULL) | |
707 | return 1; | |
708 | ||
709 | bp = find_gdb_breakpoint_at (addr); | |
710 | if (bp == NULL) | |
711 | return -1; | |
712 | ||
9f3a5c85 LM |
713 | /* Before deleting the breakpoint, make sure to free |
714 | its condition list. */ | |
715 | clear_gdb_breakpoint_conditions (addr); | |
8b07ae33 PA |
716 | err = delete_breakpoint (bp); |
717 | if (err) | |
718 | return -1; | |
719 | ||
720 | return 0; | |
721 | } | |
722 | ||
9f3a5c85 LM |
723 | /* Clear all conditions associated with this breakpoint address. */ |
724 | ||
725 | void | |
726 | clear_gdb_breakpoint_conditions (CORE_ADDR addr) | |
727 | { | |
728 | struct breakpoint *bp = find_gdb_breakpoint_at (addr); | |
412c89dd | 729 | struct point_cond_list *cond; |
9f3a5c85 LM |
730 | |
731 | if (bp == NULL || bp->cond_list == NULL) | |
732 | return; | |
733 | ||
734 | cond = bp->cond_list; | |
9f3a5c85 LM |
735 | |
736 | while (cond != NULL) | |
737 | { | |
412c89dd LM |
738 | struct point_cond_list *cond_next; |
739 | ||
740 | cond_next = cond->next; | |
741 | free (cond->cond->bytes); | |
9f3a5c85 LM |
742 | free (cond->cond); |
743 | free (cond); | |
412c89dd | 744 | cond = cond_next; |
9f3a5c85 LM |
745 | } |
746 | ||
747 | bp->cond_list = NULL; | |
748 | } | |
749 | ||
750 | /* Add condition CONDITION to GDBserver's breakpoint BP. */ | |
751 | ||
752 | void | |
753 | add_condition_to_breakpoint (struct breakpoint *bp, | |
754 | struct agent_expr *condition) | |
755 | { | |
756 | struct point_cond_list *new_cond; | |
757 | ||
758 | /* Create new condition. */ | |
759 | new_cond = xcalloc (1, sizeof (*new_cond)); | |
760 | new_cond->cond = condition; | |
761 | ||
762 | /* Add condition to the list. */ | |
763 | new_cond->next = bp->cond_list; | |
764 | bp->cond_list = new_cond; | |
765 | } | |
766 | ||
767 | /* Add a target-side condition CONDITION to the breakpoint at ADDR. */ | |
768 | ||
8b07ae33 | 769 | int |
9f3a5c85 LM |
770 | add_breakpoint_condition (CORE_ADDR addr, char **condition) |
771 | { | |
772 | struct breakpoint *bp = find_gdb_breakpoint_at (addr); | |
773 | char *actparm = *condition; | |
774 | struct agent_expr *cond; | |
775 | ||
776 | if (bp == NULL) | |
777 | return 1; | |
778 | ||
779 | if (condition == NULL) | |
780 | return 1; | |
781 | ||
782 | cond = gdb_parse_agent_expr (&actparm); | |
783 | ||
784 | if (cond == NULL) | |
785 | { | |
786 | fprintf (stderr, "Condition evaluation failed. " | |
787 | "Assuming unconditional.\n"); | |
788 | return 0; | |
789 | } | |
790 | ||
791 | add_condition_to_breakpoint (bp, cond); | |
792 | ||
793 | *condition = actparm; | |
794 | ||
795 | return 0; | |
796 | } | |
797 | ||
798 | /* Evaluate condition (if any) at breakpoint BP. Return 1 if | |
799 | true and 0 otherwise. */ | |
800 | ||
801 | int | |
802 | gdb_condition_true_at_breakpoint (CORE_ADDR where) | |
8b07ae33 | 803 | { |
9f3a5c85 | 804 | /* Fetch registers for the current inferior. */ |
8b07ae33 | 805 | struct breakpoint *bp = find_gdb_breakpoint_at (where); |
9f3a5c85 LM |
806 | ULONGEST value = 0; |
807 | struct point_cond_list *cl; | |
808 | int err = 0; | |
809 | ||
810 | struct regcache *regcache = get_thread_regcache (current_inferior, 1); | |
811 | ||
812 | if (bp == NULL) | |
813 | return 0; | |
8b07ae33 | 814 | |
9f3a5c85 LM |
815 | /* Check if the breakpoint is unconditional. If it is, |
816 | the condition always evaluates to TRUE. */ | |
817 | if (bp->cond_list == NULL) | |
818 | return 1; | |
819 | ||
820 | /* Evaluate each condition in the breakpoint's list of conditions. | |
821 | Return true if any of the conditions evaluates to TRUE. | |
822 | ||
823 | If we failed to evaluate the expression, TRUE is returned. This | |
824 | forces GDB to reevaluate the conditions. */ | |
825 | for (cl = bp->cond_list; | |
826 | cl && !value && !err; cl = cl->next) | |
827 | { | |
828 | /* Evaluate the condition. */ | |
829 | err = gdb_eval_agent_expr (regcache, NULL, cl->cond, &value); | |
830 | } | |
831 | ||
832 | if (err) | |
833 | return 1; | |
834 | ||
835 | return (value != 0); | |
836 | } | |
837 | ||
838 | /* Return 1 if there is a breakpoint inserted in address WHERE | |
839 | and if its condition, if it exists, is true. */ | |
840 | ||
841 | int | |
842 | gdb_breakpoint_here (CORE_ADDR where) | |
843 | { | |
844 | return (find_gdb_breakpoint_at (where) != NULL); | |
68070c10 PA |
845 | } |
846 | ||
d50171e4 PA |
847 | void |
848 | set_reinsert_breakpoint (CORE_ADDR stop_at) | |
611cb4a5 | 849 | { |
414a389f PA |
850 | struct breakpoint *bp; |
851 | ||
852 | bp = set_breakpoint_at (stop_at, NULL); | |
414a389f | 853 | bp->type = reinsert_breakpoint; |
611cb4a5 DJ |
854 | } |
855 | ||
856 | void | |
d50171e4 | 857 | delete_reinsert_breakpoints (void) |
611cb4a5 | 858 | { |
d50171e4 PA |
859 | struct process_info *proc = current_process (); |
860 | struct breakpoint *bp, **bp_link; | |
611cb4a5 | 861 | |
d50171e4 PA |
862 | bp = proc->breakpoints; |
863 | bp_link = &proc->breakpoints; | |
611cb4a5 | 864 | |
d50171e4 PA |
865 | while (bp) |
866 | { | |
414a389f PA |
867 | if (bp->type == reinsert_breakpoint) |
868 | { | |
869 | *bp_link = bp->next; | |
8b07ae33 | 870 | release_breakpoint (proc, bp); |
414a389f PA |
871 | bp = *bp_link; |
872 | } | |
873 | else | |
874 | { | |
875 | bp_link = &bp->next; | |
876 | bp = *bp_link; | |
877 | } | |
d50171e4 PA |
878 | } |
879 | } | |
b65d95c5 | 880 | |
d50171e4 | 881 | static void |
8b07ae33 | 882 | uninsert_raw_breakpoint (struct raw_breakpoint *bp) |
d50171e4 PA |
883 | { |
884 | if (bp->inserted) | |
885 | { | |
886 | int err; | |
6bf36717 | 887 | unsigned char buf[MAX_BREAKPOINT_LEN]; |
d50171e4 PA |
888 | |
889 | bp->inserted = 0; | |
fa593d66 PA |
890 | /* Since there can be fast tracepoint jumps inserted in the same |
891 | address range, we use `write_inferior_memory', which takes | |
892 | care of layering breakpoints on top of fast tracepoints, and | |
893 | on top of the buffer we pass it. This works because we've | |
894 | already unlinked the fast tracepoint jump above. Also note | |
895 | that we need to pass the current shadow contents, because | |
896 | write_inferior_memory updates any shadow memory with what we | |
897 | pass here, and we want that to be a nop. */ | |
6bf36717 JK |
898 | memcpy (buf, bp->old_data, breakpoint_len); |
899 | err = write_inferior_memory (bp->pc, buf, breakpoint_len); | |
d50171e4 PA |
900 | if (err != 0) |
901 | { | |
902 | bp->inserted = 1; | |
611cb4a5 | 903 | |
d50171e4 PA |
904 | if (debug_threads) |
905 | fprintf (stderr, | |
906 | "Failed to uninsert raw breakpoint at 0x%s (%s).\n", | |
907 | paddress (bp->pc), strerror (err)); | |
908 | } | |
909 | } | |
611cb4a5 DJ |
910 | } |
911 | ||
912 | void | |
d50171e4 | 913 | uninsert_breakpoints_at (CORE_ADDR pc) |
611cb4a5 | 914 | { |
8b07ae33 | 915 | struct raw_breakpoint *bp; |
611cb4a5 | 916 | |
8b07ae33 | 917 | bp = find_raw_breakpoint_at (pc); |
611cb4a5 | 918 | if (bp == NULL) |
d50171e4 PA |
919 | { |
920 | /* This can happen when we remove all breakpoints while handling | |
921 | a step-over. */ | |
922 | if (debug_threads) | |
923 | fprintf (stderr, | |
924 | "Could not find breakpoint at 0x%s " | |
925 | "in list (uninserting).\n", | |
926 | paddress (pc)); | |
927 | return; | |
928 | } | |
611cb4a5 | 929 | |
d50171e4 | 930 | if (bp->inserted) |
8b07ae33 | 931 | uninsert_raw_breakpoint (bp); |
611cb4a5 DJ |
932 | } |
933 | ||
0fb4aa4b PA |
934 | void |
935 | uninsert_all_breakpoints (void) | |
936 | { | |
937 | struct process_info *proc = current_process (); | |
938 | struct raw_breakpoint *bp; | |
939 | ||
940 | for (bp = proc->raw_breakpoints; bp != NULL; bp = bp->next) | |
941 | if (bp->inserted) | |
942 | uninsert_raw_breakpoint (bp); | |
943 | } | |
944 | ||
d50171e4 | 945 | static void |
8b07ae33 | 946 | reinsert_raw_breakpoint (struct raw_breakpoint *bp) |
611cb4a5 | 947 | { |
d50171e4 | 948 | int err; |
611cb4a5 | 949 | |
d50171e4 | 950 | if (bp->inserted) |
611cb4a5 DJ |
951 | error ("Breakpoint already inserted at reinsert time."); |
952 | ||
d50171e4 PA |
953 | err = (*the_target->write_memory) (bp->pc, breakpoint_data, |
954 | breakpoint_len); | |
955 | if (err == 0) | |
956 | bp->inserted = 1; | |
957 | else if (debug_threads) | |
958 | fprintf (stderr, | |
959 | "Failed to reinsert breakpoint at 0x%s (%s).\n", | |
960 | paddress (bp->pc), strerror (err)); | |
611cb4a5 DJ |
961 | } |
962 | ||
d50171e4 PA |
963 | void |
964 | reinsert_breakpoints_at (CORE_ADDR pc) | |
611cb4a5 | 965 | { |
8b07ae33 | 966 | struct raw_breakpoint *bp; |
611cb4a5 | 967 | |
8b07ae33 | 968 | bp = find_raw_breakpoint_at (pc); |
611cb4a5 | 969 | if (bp == NULL) |
611cb4a5 | 970 | { |
d50171e4 PA |
971 | /* This can happen when we remove all breakpoints while handling |
972 | a step-over. */ | |
973 | if (debug_threads) | |
974 | fprintf (stderr, | |
8b07ae33 | 975 | "Could not find raw breakpoint at 0x%s " |
d50171e4 PA |
976 | "in list (reinserting).\n", |
977 | paddress (pc)); | |
978 | return; | |
611cb4a5 DJ |
979 | } |
980 | ||
414a389f | 981 | reinsert_raw_breakpoint (bp); |
d50171e4 PA |
982 | } |
983 | ||
0fb4aa4b PA |
984 | void |
985 | reinsert_all_breakpoints (void) | |
986 | { | |
987 | struct process_info *proc = current_process (); | |
988 | struct raw_breakpoint *bp; | |
989 | ||
990 | for (bp = proc->raw_breakpoints; bp != NULL; bp = bp->next) | |
991 | if (!bp->inserted) | |
992 | reinsert_raw_breakpoint (bp); | |
993 | } | |
994 | ||
d50171e4 PA |
995 | void |
996 | check_breakpoints (CORE_ADDR stop_pc) | |
997 | { | |
998 | struct process_info *proc = current_process (); | |
999 | struct breakpoint *bp, **bp_link; | |
1000 | ||
1001 | bp = proc->breakpoints; | |
1002 | bp_link = &proc->breakpoints; | |
1003 | ||
1004 | while (bp) | |
b65d95c5 | 1005 | { |
8b07ae33 | 1006 | if (bp->raw->pc == stop_pc) |
d50171e4 | 1007 | { |
8b07ae33 | 1008 | if (!bp->raw->inserted) |
d50171e4 PA |
1009 | { |
1010 | warning ("Hit a removed breakpoint?"); | |
1011 | return; | |
1012 | } | |
1013 | ||
1014 | if (bp->handler != NULL && (*bp->handler) (stop_pc)) | |
1015 | { | |
1016 | *bp_link = bp->next; | |
1017 | ||
8b07ae33 | 1018 | release_breakpoint (proc, bp); |
d50171e4 PA |
1019 | |
1020 | bp = *bp_link; | |
1021 | continue; | |
1022 | } | |
1023 | } | |
1024 | ||
1025 | bp_link = &bp->next; | |
1026 | bp = *bp_link; | |
b65d95c5 | 1027 | } |
611cb4a5 DJ |
1028 | } |
1029 | ||
1030 | void | |
f450004a | 1031 | set_breakpoint_data (const unsigned char *bp_data, int bp_len) |
611cb4a5 DJ |
1032 | { |
1033 | breakpoint_data = bp_data; | |
1034 | breakpoint_len = bp_len; | |
1035 | } | |
1036 | ||
d50171e4 PA |
1037 | int |
1038 | breakpoint_here (CORE_ADDR addr) | |
1039 | { | |
8b07ae33 | 1040 | return (find_raw_breakpoint_at (addr) != NULL); |
d50171e4 PA |
1041 | } |
1042 | ||
1043 | int | |
1044 | breakpoint_inserted_here (CORE_ADDR addr) | |
1045 | { | |
8b07ae33 | 1046 | struct raw_breakpoint *bp; |
d50171e4 | 1047 | |
8b07ae33 | 1048 | bp = find_raw_breakpoint_at (addr); |
d50171e4 | 1049 | |
8b07ae33 | 1050 | return (bp != NULL && bp->inserted); |
d50171e4 PA |
1051 | } |
1052 | ||
d3bbe7a0 PA |
1053 | static int |
1054 | validate_inserted_breakpoint (struct raw_breakpoint *bp) | |
1055 | { | |
1056 | unsigned char *buf; | |
1057 | int err; | |
1058 | ||
1059 | gdb_assert (bp->inserted); | |
1060 | ||
1061 | buf = alloca (breakpoint_len); | |
1062 | err = (*the_target->read_memory) (bp->pc, buf, breakpoint_len); | |
1063 | if (err || memcmp (buf, breakpoint_data, breakpoint_len) != 0) | |
1064 | { | |
1065 | /* Tag it as gone. */ | |
1066 | bp->inserted = 0; | |
1067 | bp->shlib_disabled = 1; | |
1068 | return 0; | |
1069 | } | |
1070 | ||
1071 | return 1; | |
1072 | } | |
1073 | ||
1074 | static void | |
1075 | delete_disabled_breakpoints (void) | |
1076 | { | |
1077 | struct process_info *proc = current_process (); | |
1078 | struct breakpoint *bp, *next; | |
1079 | ||
1080 | for (bp = proc->breakpoints; bp != NULL; bp = next) | |
1081 | { | |
1082 | next = bp->next; | |
1083 | if (bp->raw->shlib_disabled) | |
1084 | delete_breakpoint_1 (proc, bp); | |
1085 | } | |
1086 | } | |
1087 | ||
1088 | /* Check if breakpoints we inserted still appear to be inserted. They | |
1089 | may disappear due to a shared library unload, and worse, a new | |
1090 | shared library may be reloaded at the same address as the | |
1091 | previously unloaded one. If that happens, we should make sure that | |
1092 | the shadow memory of the old breakpoints isn't used when reading or | |
1093 | writing memory. */ | |
1094 | ||
1095 | void | |
1096 | validate_breakpoints (void) | |
1097 | { | |
1098 | struct process_info *proc = current_process (); | |
1099 | struct breakpoint *bp; | |
1100 | ||
1101 | for (bp = proc->breakpoints; bp != NULL; bp = bp->next) | |
1102 | { | |
1103 | if (bp->raw->inserted) | |
1104 | validate_inserted_breakpoint (bp->raw); | |
1105 | } | |
1106 | ||
1107 | delete_disabled_breakpoints (); | |
1108 | } | |
1109 | ||
611cb4a5 | 1110 | void |
f450004a | 1111 | check_mem_read (CORE_ADDR mem_addr, unsigned char *buf, int mem_len) |
611cb4a5 | 1112 | { |
95954743 | 1113 | struct process_info *proc = current_process (); |
8b07ae33 | 1114 | struct raw_breakpoint *bp = proc->raw_breakpoints; |
fa593d66 | 1115 | struct fast_tracepoint_jump *jp = proc->fast_tracepoint_jumps; |
611cb4a5 | 1116 | CORE_ADDR mem_end = mem_addr + mem_len; |
d3bbe7a0 | 1117 | int disabled_one = 0; |
611cb4a5 | 1118 | |
fa593d66 PA |
1119 | for (; jp != NULL; jp = jp->next) |
1120 | { | |
1121 | CORE_ADDR bp_end = jp->pc + jp->length; | |
1122 | CORE_ADDR start, end; | |
1123 | int copy_offset, copy_len, buf_offset; | |
1124 | ||
6bf36717 JK |
1125 | gdb_assert (fast_tracepoint_jump_shadow (jp) >= buf + mem_len |
1126 | || buf >= fast_tracepoint_jump_shadow (jp) + (jp)->length); | |
1127 | ||
fa593d66 PA |
1128 | if (mem_addr >= bp_end) |
1129 | continue; | |
1130 | if (jp->pc >= mem_end) | |
1131 | continue; | |
1132 | ||
1133 | start = jp->pc; | |
1134 | if (mem_addr > start) | |
1135 | start = mem_addr; | |
1136 | ||
1137 | end = bp_end; | |
1138 | if (end > mem_end) | |
1139 | end = mem_end; | |
1140 | ||
1141 | copy_len = end - start; | |
1142 | copy_offset = start - jp->pc; | |
1143 | buf_offset = start - mem_addr; | |
1144 | ||
1145 | if (jp->inserted) | |
1146 | memcpy (buf + buf_offset, | |
1147 | fast_tracepoint_jump_shadow (jp) + copy_offset, | |
1148 | copy_len); | |
1149 | } | |
1150 | ||
611cb4a5 DJ |
1151 | for (; bp != NULL; bp = bp->next) |
1152 | { | |
1153 | CORE_ADDR bp_end = bp->pc + breakpoint_len; | |
1154 | CORE_ADDR start, end; | |
1155 | int copy_offset, copy_len, buf_offset; | |
1156 | ||
6bf36717 JK |
1157 | gdb_assert (bp->old_data >= buf + mem_len |
1158 | || buf >= &bp->old_data[sizeof (bp->old_data)]); | |
1159 | ||
611cb4a5 DJ |
1160 | if (mem_addr >= bp_end) |
1161 | continue; | |
1162 | if (bp->pc >= mem_end) | |
1163 | continue; | |
1164 | ||
1165 | start = bp->pc; | |
1166 | if (mem_addr > start) | |
1167 | start = mem_addr; | |
1168 | ||
1169 | end = bp_end; | |
1170 | if (end > mem_end) | |
1171 | end = mem_end; | |
1172 | ||
1173 | copy_len = end - start; | |
1174 | copy_offset = start - bp->pc; | |
1175 | buf_offset = start - mem_addr; | |
1176 | ||
8b07ae33 | 1177 | if (bp->inserted) |
d3bbe7a0 PA |
1178 | { |
1179 | if (validate_inserted_breakpoint (bp)) | |
1180 | memcpy (buf + buf_offset, bp->old_data + copy_offset, copy_len); | |
1181 | else | |
1182 | disabled_one = 1; | |
1183 | } | |
611cb4a5 | 1184 | } |
d3bbe7a0 PA |
1185 | |
1186 | if (disabled_one) | |
1187 | delete_disabled_breakpoints (); | |
611cb4a5 DJ |
1188 | } |
1189 | ||
1190 | void | |
b9fd1791 PA |
1191 | check_mem_write (CORE_ADDR mem_addr, unsigned char *buf, |
1192 | const unsigned char *myaddr, int mem_len) | |
611cb4a5 | 1193 | { |
95954743 | 1194 | struct process_info *proc = current_process (); |
8b07ae33 | 1195 | struct raw_breakpoint *bp = proc->raw_breakpoints; |
fa593d66 | 1196 | struct fast_tracepoint_jump *jp = proc->fast_tracepoint_jumps; |
611cb4a5 | 1197 | CORE_ADDR mem_end = mem_addr + mem_len; |
d3bbe7a0 | 1198 | int disabled_one = 0; |
611cb4a5 | 1199 | |
fa593d66 PA |
1200 | /* First fast tracepoint jumps, then breakpoint traps on top. */ |
1201 | ||
1202 | for (; jp != NULL; jp = jp->next) | |
1203 | { | |
1204 | CORE_ADDR jp_end = jp->pc + jp->length; | |
1205 | CORE_ADDR start, end; | |
1206 | int copy_offset, copy_len, buf_offset; | |
1207 | ||
6bf36717 JK |
1208 | gdb_assert (fast_tracepoint_jump_shadow (jp) >= myaddr + mem_len |
1209 | || myaddr >= fast_tracepoint_jump_shadow (jp) + (jp)->length); | |
1210 | gdb_assert (fast_tracepoint_jump_insn (jp) >= buf + mem_len | |
1211 | || buf >= fast_tracepoint_jump_insn (jp) + (jp)->length); | |
1212 | ||
fa593d66 PA |
1213 | if (mem_addr >= jp_end) |
1214 | continue; | |
1215 | if (jp->pc >= mem_end) | |
1216 | continue; | |
1217 | ||
1218 | start = jp->pc; | |
1219 | if (mem_addr > start) | |
1220 | start = mem_addr; | |
1221 | ||
1222 | end = jp_end; | |
1223 | if (end > mem_end) | |
1224 | end = mem_end; | |
1225 | ||
1226 | copy_len = end - start; | |
1227 | copy_offset = start - jp->pc; | |
1228 | buf_offset = start - mem_addr; | |
1229 | ||
1230 | memcpy (fast_tracepoint_jump_shadow (jp) + copy_offset, | |
b9fd1791 | 1231 | myaddr + buf_offset, copy_len); |
fa593d66 PA |
1232 | if (jp->inserted) |
1233 | memcpy (buf + buf_offset, | |
1234 | fast_tracepoint_jump_insn (jp) + copy_offset, copy_len); | |
1235 | } | |
1236 | ||
611cb4a5 DJ |
1237 | for (; bp != NULL; bp = bp->next) |
1238 | { | |
1239 | CORE_ADDR bp_end = bp->pc + breakpoint_len; | |
1240 | CORE_ADDR start, end; | |
1241 | int copy_offset, copy_len, buf_offset; | |
1242 | ||
6bf36717 JK |
1243 | gdb_assert (bp->old_data >= myaddr + mem_len |
1244 | || myaddr >= &bp->old_data[sizeof (bp->old_data)]); | |
1245 | ||
611cb4a5 DJ |
1246 | if (mem_addr >= bp_end) |
1247 | continue; | |
1248 | if (bp->pc >= mem_end) | |
1249 | continue; | |
1250 | ||
1251 | start = bp->pc; | |
1252 | if (mem_addr > start) | |
1253 | start = mem_addr; | |
1254 | ||
1255 | end = bp_end; | |
1256 | if (end > mem_end) | |
1257 | end = mem_end; | |
1258 | ||
1259 | copy_len = end - start; | |
1260 | copy_offset = start - bp->pc; | |
1261 | buf_offset = start - mem_addr; | |
1262 | ||
b9fd1791 | 1263 | memcpy (bp->old_data + copy_offset, myaddr + buf_offset, copy_len); |
d50171e4 | 1264 | if (bp->inserted) |
d3bbe7a0 PA |
1265 | { |
1266 | if (validate_inserted_breakpoint (bp)) | |
1267 | memcpy (buf + buf_offset, breakpoint_data + copy_offset, copy_len); | |
1268 | else | |
1269 | disabled_one = 1; | |
1270 | } | |
611cb4a5 | 1271 | } |
d3bbe7a0 PA |
1272 | |
1273 | if (disabled_one) | |
1274 | delete_disabled_breakpoints (); | |
611cb4a5 | 1275 | } |
ae13219e | 1276 | |
95954743 | 1277 | /* Delete all breakpoints, and un-insert them from the inferior. */ |
ae13219e DJ |
1278 | |
1279 | void | |
1280 | delete_all_breakpoints (void) | |
1281 | { | |
95954743 PA |
1282 | struct process_info *proc = current_process (); |
1283 | ||
1284 | while (proc->breakpoints) | |
8b07ae33 | 1285 | delete_breakpoint_1 (proc, proc->breakpoints); |
95954743 PA |
1286 | } |
1287 | ||
f9e39928 | 1288 | /* Clear the "inserted" flag in all breakpoints. */ |
95954743 PA |
1289 | |
1290 | void | |
f9e39928 | 1291 | mark_breakpoints_out (struct process_info *proc) |
95954743 | 1292 | { |
8b07ae33 | 1293 | struct raw_breakpoint *raw_bp; |
95954743 | 1294 | |
8b07ae33 PA |
1295 | for (raw_bp = proc->raw_breakpoints; raw_bp != NULL; raw_bp = raw_bp->next) |
1296 | raw_bp->inserted = 0; | |
f9e39928 PA |
1297 | } |
1298 | ||
1299 | /* Release all breakpoints, but do not try to un-insert them from the | |
1300 | inferior. */ | |
1301 | ||
1302 | void | |
1303 | free_all_breakpoints (struct process_info *proc) | |
1304 | { | |
1305 | mark_breakpoints_out (proc); | |
8b07ae33 PA |
1306 | |
1307 | /* Note: use PROC explicitly instead of deferring to | |
1308 | delete_all_breakpoints --- CURRENT_INFERIOR may already have been | |
1309 | released when we get here. There should be no call to | |
1310 | current_process from here on. */ | |
95954743 | 1311 | while (proc->breakpoints) |
8b07ae33 | 1312 | delete_breakpoint_1 (proc, proc->breakpoints); |
ae13219e | 1313 | } |