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611cb4a5 | 1 | /* Memory breakpoint operations for the remote server for GDB. |
ecd75fc8 | 2 | Copyright (C) 2002-2014 Free Software Foundation, Inc. |
611cb4a5 DJ |
3 | |
4 | Contributed by MontaVista Software. | |
5 | ||
6 | This file is part of GDB. | |
7 | ||
8 | This program is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 10 | the Free Software Foundation; either version 3 of the License, or |
611cb4a5 DJ |
11 | (at your option) any later version. |
12 | ||
13 | This program is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 19 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
611cb4a5 DJ |
20 | |
21 | #include "server.h" | |
9f3a5c85 LM |
22 | #include "regcache.h" |
23 | #include "ax.h" | |
7f216e7c | 24 | #include <stdint.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 | 31 | /* GDB will never try to install multiple breakpoints at the same |
802e8e6d PA |
32 | address. However, we can see GDB requesting to insert a breakpoint |
33 | at an address is had already inserted one previously in a few | |
34 | situations. | |
35 | ||
36 | - The RSP documentation on Z packets says that to avoid potential | |
37 | problems with duplicate packets, the operations should be | |
38 | implemented in an idempotent way. | |
39 | ||
40 | - A breakpoint is set at ADDR, an address in a shared library. | |
41 | Then the shared library is unloaded. And then another, unrelated, | |
42 | breakpoint at ADDR is set. There is not breakpoint removal request | |
43 | between the first and the second breakpoint. | |
44 | ||
45 | - When GDB wants to update the target-side breakpoint conditions or | |
46 | commands, it re-inserts the breakpoint, with updated | |
47 | conditions/commands associated. | |
48 | ||
49 | Also, we need to keep track of internal breakpoints too, so we do | |
50 | need to be able to install multiple breakpoints at the same address | |
51 | transparently. | |
52 | ||
53 | We keep track of two different, and closely related structures. A | |
54 | raw breakpoint, which manages the low level, close to the metal | |
55 | aspect of a breakpoint. It holds the breakpoint address, and for | |
56 | software breakpoints, a buffer holding a copy of the instructions | |
8b07ae33 PA |
57 | that would be in memory had not been a breakpoint there (we call |
58 | that the shadow memory of the breakpoint). We occasionally need to | |
59 | temporarilly uninsert a breakpoint without the client knowing about | |
60 | it (e.g., to step over an internal breakpoint), so we keep an | |
61 | `inserted' state associated with this low level breakpoint | |
62 | structure. There can only be one such object for a given address. | |
63 | Then, we have (a bit higher level) breakpoints. This structure | |
64 | holds a callback to be called whenever a breakpoint is hit, a | |
65 | high-level type, and a link to a low level raw breakpoint. There | |
66 | can be many high-level breakpoints at the same address, and all of | |
67 | them will point to the same raw breakpoint, which is reference | |
68 | counted. */ | |
69 | ||
70 | /* The low level, physical, raw breakpoint. */ | |
71 | struct raw_breakpoint | |
72 | { | |
73 | struct raw_breakpoint *next; | |
74 | ||
802e8e6d PA |
75 | /* The low level type of the breakpoint (software breakpoint, |
76 | watchpoint, etc.) */ | |
77 | enum raw_bkpt_type raw_type; | |
78 | ||
8b07ae33 PA |
79 | /* A reference count. Each high level breakpoint referencing this |
80 | raw breakpoint accounts for one reference. */ | |
81 | int refcount; | |
82 | ||
83 | /* The breakpoint's insertion address. There can only be one raw | |
84 | breakpoint for a given PC. */ | |
85 | CORE_ADDR pc; | |
86 | ||
802e8e6d PA |
87 | /* The breakpoint's size. */ |
88 | int size; | |
89 | ||
8b07ae33 PA |
90 | /* The breakpoint's shadow memory. */ |
91 | unsigned char old_data[MAX_BREAKPOINT_LEN]; | |
92 | ||
802e8e6d PA |
93 | /* Positive if this breakpoint is currently inserted in the |
94 | inferior. Negative if it was, but we've detected that it's now | |
95 | gone. Zero if not inserted. */ | |
8b07ae33 PA |
96 | int inserted; |
97 | }; | |
98 | ||
414a389f PA |
99 | /* The type of a breakpoint. */ |
100 | enum bkpt_type | |
101 | { | |
8b07ae33 | 102 | /* A GDB breakpoint, requested with a Z0 packet. */ |
802e8e6d PA |
103 | gdb_breakpoint_Z0, |
104 | ||
105 | /* A GDB hardware breakpoint, requested with a Z1 packet. */ | |
106 | gdb_breakpoint_Z1, | |
107 | ||
108 | /* A GDB write watchpoint, requested with a Z2 packet. */ | |
109 | gdb_breakpoint_Z2, | |
110 | ||
111 | /* A GDB read watchpoint, requested with a Z3 packet. */ | |
112 | gdb_breakpoint_Z3, | |
113 | ||
114 | /* A GDB access watchpoint, requested with a Z4 packet. */ | |
115 | gdb_breakpoint_Z4, | |
8b07ae33 | 116 | |
414a389f PA |
117 | /* A basic-software-single-step breakpoint. */ |
118 | reinsert_breakpoint, | |
119 | ||
120 | /* Any other breakpoint type that doesn't require specific | |
121 | treatment goes here. E.g., an event breakpoint. */ | |
122 | other_breakpoint, | |
123 | }; | |
124 | ||
9f3a5c85 LM |
125 | struct point_cond_list |
126 | { | |
127 | /* Pointer to the agent expression that is the breakpoint's | |
128 | conditional. */ | |
129 | struct agent_expr *cond; | |
130 | ||
131 | /* Pointer to the next condition. */ | |
132 | struct point_cond_list *next; | |
133 | }; | |
134 | ||
d3ce09f5 SS |
135 | struct point_command_list |
136 | { | |
137 | /* Pointer to the agent expression that is the breakpoint's | |
138 | commands. */ | |
139 | struct agent_expr *cmd; | |
140 | ||
141 | /* Flag that is true if this command should run even while GDB is | |
142 | disconnected. */ | |
143 | int persistence; | |
144 | ||
145 | /* Pointer to the next command. */ | |
146 | struct point_command_list *next; | |
147 | }; | |
148 | ||
8b07ae33 | 149 | /* A high level (in gdbserver's perspective) breakpoint. */ |
611cb4a5 DJ |
150 | struct breakpoint |
151 | { | |
152 | struct breakpoint *next; | |
611cb4a5 | 153 | |
414a389f PA |
154 | /* The breakpoint's type. */ |
155 | enum bkpt_type type; | |
156 | ||
9f3a5c85 LM |
157 | /* Pointer to the condition list that should be evaluated on |
158 | the target or NULL if the breakpoint is unconditional or | |
159 | if GDB doesn't want us to evaluate the conditionals on the | |
160 | target's side. */ | |
161 | struct point_cond_list *cond_list; | |
162 | ||
d3ce09f5 SS |
163 | /* Point to the list of commands to run when this is hit. */ |
164 | struct point_command_list *command_list; | |
165 | ||
8b07ae33 PA |
166 | /* Link to this breakpoint's raw breakpoint. This is always |
167 | non-NULL. */ | |
168 | struct raw_breakpoint *raw; | |
169 | ||
b65d95c5 | 170 | /* Function to call when we hit this breakpoint. If it returns 1, |
8b07ae33 PA |
171 | the breakpoint shall be deleted; 0 or if this callback is NULL, |
172 | it will be left inserted. */ | |
b65d95c5 | 173 | int (*handler) (CORE_ADDR); |
611cb4a5 DJ |
174 | }; |
175 | ||
802e8e6d PA |
176 | /* See mem-break.h. */ |
177 | ||
932539e3 | 178 | enum target_hw_bp_type |
802e8e6d | 179 | raw_bkpt_type_to_target_hw_bp_type (enum raw_bkpt_type raw_type) |
932539e3 | 180 | { |
802e8e6d | 181 | switch (raw_type) |
932539e3 | 182 | { |
802e8e6d | 183 | case raw_bkpt_type_hw: |
932539e3 | 184 | return hw_execute; |
802e8e6d | 185 | case raw_bkpt_type_write_wp: |
932539e3 | 186 | return hw_write; |
802e8e6d | 187 | case raw_bkpt_type_read_wp: |
932539e3 | 188 | return hw_read; |
802e8e6d | 189 | case raw_bkpt_type_access_wp: |
932539e3 PA |
190 | return hw_access; |
191 | default: | |
802e8e6d PA |
192 | fatal ("bad raw breakpoing type %d", (int) raw_type); |
193 | } | |
194 | } | |
195 | ||
196 | /* See mem-break.h. */ | |
197 | ||
198 | static enum bkpt_type | |
199 | Z_packet_to_bkpt_type (char z_type) | |
200 | { | |
201 | gdb_assert ('0' <= z_type && z_type <= '4'); | |
202 | ||
203 | return gdb_breakpoint_Z0 + (z_type - '0'); | |
204 | } | |
205 | ||
206 | /* See mem-break.h. */ | |
207 | ||
208 | enum raw_bkpt_type | |
209 | Z_packet_to_raw_bkpt_type (char z_type) | |
210 | { | |
211 | switch (z_type) | |
212 | { | |
213 | case Z_PACKET_SW_BP: | |
214 | return raw_bkpt_type_sw; | |
215 | case Z_PACKET_HW_BP: | |
216 | return raw_bkpt_type_hw; | |
217 | case Z_PACKET_WRITE_WP: | |
218 | return raw_bkpt_type_write_wp; | |
219 | case Z_PACKET_READ_WP: | |
220 | return raw_bkpt_type_read_wp; | |
221 | case Z_PACKET_ACCESS_WP: | |
222 | return raw_bkpt_type_access_wp; | |
223 | default: | |
224 | gdb_assert_not_reached ("unhandled Z packet type."); | |
932539e3 PA |
225 | } |
226 | } | |
227 | ||
d3ce09f5 SS |
228 | int |
229 | any_persistent_commands () | |
230 | { | |
231 | struct process_info *proc = current_process (); | |
232 | struct breakpoint *bp; | |
233 | struct point_command_list *cl; | |
234 | ||
235 | for (bp = proc->breakpoints; bp != NULL; bp = bp->next) | |
236 | { | |
237 | for (cl = bp->command_list; cl != NULL; cl = cl->next) | |
238 | if (cl->persistence) | |
239 | return 1; | |
240 | } | |
241 | ||
242 | return 0; | |
243 | } | |
244 | ||
802e8e6d PA |
245 | /* Find low-level breakpoint of type TYPE at address ADDR that is not |
246 | insert-disabled. Returns NULL if not found. */ | |
247 | ||
8b07ae33 | 248 | static struct raw_breakpoint * |
802e8e6d | 249 | find_enabled_raw_code_breakpoint_at (CORE_ADDR addr, enum raw_bkpt_type type) |
8b07ae33 PA |
250 | { |
251 | struct process_info *proc = current_process (); | |
252 | struct raw_breakpoint *bp; | |
414a389f | 253 | |
8b07ae33 | 254 | for (bp = proc->raw_breakpoints; bp != NULL; bp = bp->next) |
802e8e6d PA |
255 | if (bp->pc == addr |
256 | && bp->raw_type == type | |
257 | && bp->inserted >= 0) | |
8b07ae33 PA |
258 | return bp; |
259 | ||
260 | return NULL; | |
261 | } | |
262 | ||
802e8e6d PA |
263 | /* Find low-level breakpoint of type TYPE at address ADDR. Returns |
264 | NULL if not found. */ | |
265 | ||
8b07ae33 | 266 | static struct raw_breakpoint * |
802e8e6d | 267 | find_raw_breakpoint_at (CORE_ADDR addr, enum raw_bkpt_type type, int size) |
611cb4a5 | 268 | { |
95954743 | 269 | struct process_info *proc = current_process (); |
8b07ae33 | 270 | struct raw_breakpoint *bp; |
802e8e6d PA |
271 | |
272 | for (bp = proc->raw_breakpoints; bp != NULL; bp = bp->next) | |
273 | if (bp->pc == addr && bp->raw_type == type && bp->size == size) | |
274 | return bp; | |
275 | ||
276 | return NULL; | |
277 | } | |
278 | ||
279 | /* See mem-break.h. */ | |
280 | ||
281 | int | |
282 | insert_memory_breakpoint (struct raw_breakpoint *bp) | |
283 | { | |
6bf36717 | 284 | unsigned char buf[MAX_BREAKPOINT_LEN]; |
802e8e6d | 285 | int err; |
611cb4a5 DJ |
286 | |
287 | if (breakpoint_data == NULL) | |
802e8e6d | 288 | return 1; |
611cb4a5 | 289 | |
802e8e6d PA |
290 | /* If the architecture treats the size field of Z packets as a |
291 | 'kind' field, then we'll need to be able to know which is the | |
292 | breakpoint instruction too. */ | |
293 | if (bp->size != breakpoint_len) | |
8b07ae33 | 294 | { |
802e8e6d PA |
295 | if (debug_threads) |
296 | debug_printf ("Don't know how to insert breakpoints of size %d.\n", | |
297 | bp->size); | |
298 | return -1; | |
8b07ae33 PA |
299 | } |
300 | ||
fa593d66 PA |
301 | /* Note that there can be fast tracepoint jumps installed in the |
302 | same memory range, so to get at the original memory, we need to | |
303 | use read_inferior_memory, which masks those out. */ | |
802e8e6d | 304 | err = read_inferior_memory (bp->pc, buf, breakpoint_len); |
d50171e4 PA |
305 | if (err != 0) |
306 | { | |
307 | if (debug_threads) | |
87ce2a04 DE |
308 | debug_printf ("Failed to read shadow memory of" |
309 | " breakpoint at 0x%s (%s).\n", | |
802e8e6d | 310 | paddress (bp->pc), strerror (err)); |
d50171e4 | 311 | } |
802e8e6d PA |
312 | else |
313 | { | |
314 | memcpy (bp->old_data, buf, breakpoint_len); | |
611cb4a5 | 315 | |
802e8e6d PA |
316 | err = (*the_target->write_memory) (bp->pc, breakpoint_data, |
317 | breakpoint_len); | |
318 | if (err != 0) | |
319 | { | |
320 | if (debug_threads) | |
321 | debug_printf ("Failed to insert breakpoint at 0x%s (%s).\n", | |
322 | paddress (bp->pc), strerror (err)); | |
323 | } | |
324 | } | |
325 | return err != 0 ? -1 : 0; | |
326 | } | |
327 | ||
328 | /* See mem-break.h */ | |
329 | ||
330 | int | |
331 | remove_memory_breakpoint (struct raw_breakpoint *bp) | |
332 | { | |
333 | unsigned char buf[MAX_BREAKPOINT_LEN]; | |
334 | int err; | |
335 | ||
336 | /* Since there can be trap breakpoints inserted in the same address | |
337 | range, we use `write_inferior_memory', which takes care of | |
338 | layering breakpoints on top of fast tracepoints, and on top of | |
339 | the buffer we pass it. This works because the caller has already | |
340 | either unlinked the breakpoint or marked it uninserted. Also | |
341 | note that we need to pass the current shadow contents, because | |
342 | write_inferior_memory updates any shadow memory with what we pass | |
343 | here, and we want that to be a nop. */ | |
344 | memcpy (buf, bp->old_data, breakpoint_len); | |
345 | err = write_inferior_memory (bp->pc, buf, breakpoint_len); | |
d50171e4 PA |
346 | if (err != 0) |
347 | { | |
348 | if (debug_threads) | |
802e8e6d PA |
349 | debug_printf ("Failed to uninsert raw breakpoint " |
350 | "at 0x%s (%s) while deleting it.\n", | |
351 | paddress (bp->pc), strerror (err)); | |
352 | } | |
353 | return err != 0 ? -1 : 0; | |
354 | } | |
355 | ||
356 | /* Set a RAW breakpoint of type TYPE and size SIZE at WHERE. On | |
357 | success, a pointer to the new breakpoint is returned. On failure, | |
358 | returns NULL and writes the error code to *ERR. */ | |
359 | ||
360 | static struct raw_breakpoint * | |
361 | set_raw_breakpoint_at (enum raw_bkpt_type type, CORE_ADDR where, int size, | |
362 | int *err) | |
363 | { | |
364 | struct process_info *proc = current_process (); | |
365 | struct raw_breakpoint *bp; | |
366 | ||
367 | if (type == raw_bkpt_type_sw || type == raw_bkpt_type_hw) | |
368 | { | |
369 | bp = find_enabled_raw_code_breakpoint_at (where, type); | |
370 | if (bp != NULL && bp->size != size) | |
371 | { | |
372 | /* A different size than previously seen. The previous | |
373 | breakpoint must be gone then. */ | |
374 | if (debug_threads) | |
375 | debug_printf ("Inconsistent breakpoint size? Was %d, now %d.\n", | |
376 | bp->size, size); | |
377 | bp->inserted = -1; | |
378 | bp = NULL; | |
379 | } | |
380 | } | |
381 | else | |
382 | bp = find_raw_breakpoint_at (where, type, size); | |
383 | ||
384 | if (bp != NULL) | |
385 | { | |
386 | bp->refcount++; | |
387 | return bp; | |
388 | } | |
389 | ||
390 | bp = xcalloc (1, sizeof (*bp)); | |
391 | bp->pc = where; | |
392 | bp->size = size; | |
393 | bp->refcount = 1; | |
394 | bp->raw_type = type; | |
395 | ||
396 | *err = the_target->insert_point (bp->raw_type, bp->pc, bp->size, bp); | |
397 | if (*err != 0) | |
398 | { | |
399 | if (debug_threads) | |
400 | debug_printf ("Failed to insert breakpoint at 0x%s (%d).\n", | |
401 | paddress (where), *err); | |
d50171e4 PA |
402 | free (bp); |
403 | return NULL; | |
404 | } | |
405 | ||
d50171e4 | 406 | bp->inserted = 1; |
802e8e6d | 407 | /* Link the breakpoint in. */ |
8b07ae33 PA |
408 | bp->next = proc->raw_breakpoints; |
409 | proc->raw_breakpoints = bp; | |
d50171e4 PA |
410 | return bp; |
411 | } | |
412 | ||
fa593d66 PA |
413 | /* Notice that breakpoint traps are always installed on top of fast |
414 | tracepoint jumps. This is even if the fast tracepoint is installed | |
415 | at a later time compared to when the breakpoint was installed. | |
416 | This means that a stopping breakpoint or tracepoint has higher | |
417 | "priority". In turn, this allows having fast and slow tracepoints | |
418 | (and breakpoints) at the same address behave correctly. */ | |
419 | ||
420 | ||
421 | /* A fast tracepoint jump. */ | |
422 | ||
423 | struct fast_tracepoint_jump | |
424 | { | |
425 | struct fast_tracepoint_jump *next; | |
426 | ||
427 | /* A reference count. GDB can install more than one fast tracepoint | |
428 | at the same address (each with its own action list, for | |
429 | example). */ | |
430 | int refcount; | |
431 | ||
432 | /* The fast tracepoint's insertion address. There can only be one | |
433 | of these for a given PC. */ | |
434 | CORE_ADDR pc; | |
435 | ||
436 | /* Non-zero if this fast tracepoint jump is currently inserted in | |
437 | the inferior. */ | |
438 | int inserted; | |
439 | ||
440 | /* The length of the jump instruction. */ | |
441 | int length; | |
442 | ||
443 | /* A poor-man's flexible array member, holding both the jump | |
444 | instruction to insert, and a copy of the instruction that would | |
445 | be in memory had not been a jump there (the shadow memory of the | |
446 | tracepoint jump). */ | |
447 | unsigned char insn_and_shadow[0]; | |
448 | }; | |
449 | ||
450 | /* Fast tracepoint FP's jump instruction to insert. */ | |
451 | #define fast_tracepoint_jump_insn(fp) \ | |
452 | ((fp)->insn_and_shadow + 0) | |
453 | ||
454 | /* The shadow memory of fast tracepoint jump FP. */ | |
455 | #define fast_tracepoint_jump_shadow(fp) \ | |
456 | ((fp)->insn_and_shadow + (fp)->length) | |
457 | ||
458 | ||
459 | /* Return the fast tracepoint jump set at WHERE. */ | |
460 | ||
461 | static struct fast_tracepoint_jump * | |
462 | find_fast_tracepoint_jump_at (CORE_ADDR where) | |
463 | { | |
464 | struct process_info *proc = current_process (); | |
465 | struct fast_tracepoint_jump *jp; | |
466 | ||
467 | for (jp = proc->fast_tracepoint_jumps; jp != NULL; jp = jp->next) | |
468 | if (jp->pc == where) | |
469 | return jp; | |
470 | ||
471 | return NULL; | |
472 | } | |
473 | ||
474 | int | |
475 | fast_tracepoint_jump_here (CORE_ADDR where) | |
476 | { | |
477 | struct fast_tracepoint_jump *jp = find_fast_tracepoint_jump_at (where); | |
478 | ||
479 | return (jp != NULL); | |
480 | } | |
481 | ||
482 | int | |
483 | delete_fast_tracepoint_jump (struct fast_tracepoint_jump *todel) | |
484 | { | |
485 | struct fast_tracepoint_jump *bp, **bp_link; | |
486 | int ret; | |
487 | struct process_info *proc = current_process (); | |
488 | ||
489 | bp = proc->fast_tracepoint_jumps; | |
490 | bp_link = &proc->fast_tracepoint_jumps; | |
491 | ||
492 | while (bp) | |
493 | { | |
494 | if (bp == todel) | |
495 | { | |
496 | if (--bp->refcount == 0) | |
497 | { | |
498 | struct fast_tracepoint_jump *prev_bp_link = *bp_link; | |
6bf36717 | 499 | unsigned char *buf; |
fa593d66 PA |
500 | |
501 | /* Unlink it. */ | |
502 | *bp_link = bp->next; | |
503 | ||
504 | /* Since there can be breakpoints inserted in the same | |
505 | address range, we use `write_inferior_memory', which | |
506 | takes care of layering breakpoints on top of fast | |
507 | tracepoints, and on top of the buffer we pass it. | |
508 | This works because we've already unlinked the fast | |
509 | tracepoint jump above. Also note that we need to | |
510 | pass the current shadow contents, because | |
511 | write_inferior_memory updates any shadow memory with | |
512 | what we pass here, and we want that to be a nop. */ | |
6bf36717 JK |
513 | buf = alloca (bp->length); |
514 | memcpy (buf, fast_tracepoint_jump_shadow (bp), bp->length); | |
515 | ret = write_inferior_memory (bp->pc, buf, bp->length); | |
fa593d66 PA |
516 | if (ret != 0) |
517 | { | |
518 | /* Something went wrong, relink the jump. */ | |
519 | *bp_link = prev_bp_link; | |
520 | ||
521 | if (debug_threads) | |
87ce2a04 DE |
522 | debug_printf ("Failed to uninsert fast tracepoint jump " |
523 | "at 0x%s (%s) while deleting it.\n", | |
524 | paddress (bp->pc), strerror (ret)); | |
fa593d66 PA |
525 | return ret; |
526 | } | |
527 | ||
528 | free (bp); | |
529 | } | |
530 | ||
531 | return 0; | |
532 | } | |
533 | else | |
534 | { | |
535 | bp_link = &bp->next; | |
536 | bp = *bp_link; | |
537 | } | |
538 | } | |
539 | ||
540 | warning ("Could not find fast tracepoint jump in list."); | |
541 | return ENOENT; | |
542 | } | |
543 | ||
5c73ff4e YQ |
544 | void |
545 | inc_ref_fast_tracepoint_jump (struct fast_tracepoint_jump *jp) | |
546 | { | |
547 | jp->refcount++; | |
548 | } | |
549 | ||
fa593d66 PA |
550 | struct fast_tracepoint_jump * |
551 | set_fast_tracepoint_jump (CORE_ADDR where, | |
552 | unsigned char *insn, ULONGEST length) | |
553 | { | |
554 | struct process_info *proc = current_process (); | |
555 | struct fast_tracepoint_jump *jp; | |
556 | int err; | |
6bf36717 | 557 | unsigned char *buf; |
fa593d66 PA |
558 | |
559 | /* We refcount fast tracepoint jumps. Check if we already know | |
560 | about a jump at this address. */ | |
561 | jp = find_fast_tracepoint_jump_at (where); | |
562 | if (jp != NULL) | |
563 | { | |
564 | jp->refcount++; | |
565 | return jp; | |
566 | } | |
567 | ||
568 | /* We don't, so create a new object. Double the length, because the | |
569 | flexible array member holds both the jump insn, and the | |
570 | shadow. */ | |
571 | jp = xcalloc (1, sizeof (*jp) + (length * 2)); | |
572 | jp->pc = where; | |
573 | jp->length = length; | |
574 | memcpy (fast_tracepoint_jump_insn (jp), insn, length); | |
575 | jp->refcount = 1; | |
6bf36717 | 576 | buf = alloca (length); |
fa593d66 PA |
577 | |
578 | /* Note that there can be trap breakpoints inserted in the same | |
579 | address range. To access the original memory contents, we use | |
580 | `read_inferior_memory', which masks out breakpoints. */ | |
6bf36717 | 581 | err = read_inferior_memory (where, buf, length); |
fa593d66 PA |
582 | if (err != 0) |
583 | { | |
584 | if (debug_threads) | |
87ce2a04 DE |
585 | debug_printf ("Failed to read shadow memory of" |
586 | " fast tracepoint at 0x%s (%s).\n", | |
587 | paddress (where), strerror (err)); | |
fa593d66 PA |
588 | free (jp); |
589 | return NULL; | |
590 | } | |
6bf36717 | 591 | memcpy (fast_tracepoint_jump_shadow (jp), buf, length); |
fa593d66 PA |
592 | |
593 | /* Link the jump in. */ | |
594 | jp->inserted = 1; | |
595 | jp->next = proc->fast_tracepoint_jumps; | |
596 | proc->fast_tracepoint_jumps = jp; | |
597 | ||
598 | /* Since there can be trap breakpoints inserted in the same address | |
599 | range, we use use `write_inferior_memory', which takes care of | |
600 | layering breakpoints on top of fast tracepoints, on top of the | |
601 | buffer we pass it. This works because we've already linked in | |
602 | the fast tracepoint jump above. Also note that we need to pass | |
603 | the current shadow contents, because write_inferior_memory | |
604 | updates any shadow memory with what we pass here, and we want | |
605 | that to be a nop. */ | |
6bf36717 | 606 | err = write_inferior_memory (where, buf, length); |
fa593d66 PA |
607 | if (err != 0) |
608 | { | |
609 | if (debug_threads) | |
87ce2a04 DE |
610 | debug_printf ("Failed to insert fast tracepoint jump at 0x%s (%s).\n", |
611 | paddress (where), strerror (err)); | |
fa593d66 PA |
612 | |
613 | /* Unlink it. */ | |
614 | proc->fast_tracepoint_jumps = jp->next; | |
615 | free (jp); | |
616 | ||
617 | return NULL; | |
618 | } | |
619 | ||
620 | return jp; | |
621 | } | |
622 | ||
623 | void | |
624 | uninsert_fast_tracepoint_jumps_at (CORE_ADDR pc) | |
625 | { | |
626 | struct fast_tracepoint_jump *jp; | |
627 | int err; | |
628 | ||
629 | jp = find_fast_tracepoint_jump_at (pc); | |
630 | if (jp == NULL) | |
631 | { | |
632 | /* This can happen when we remove all breakpoints while handling | |
633 | a step-over. */ | |
634 | if (debug_threads) | |
87ce2a04 DE |
635 | debug_printf ("Could not find fast tracepoint jump at 0x%s " |
636 | "in list (uninserting).\n", | |
637 | paddress (pc)); | |
fa593d66 PA |
638 | return; |
639 | } | |
640 | ||
641 | if (jp->inserted) | |
642 | { | |
6bf36717 JK |
643 | unsigned char *buf; |
644 | ||
fa593d66 PA |
645 | jp->inserted = 0; |
646 | ||
647 | /* Since there can be trap breakpoints inserted in the same | |
648 | address range, we use use `write_inferior_memory', which | |
649 | takes care of layering breakpoints on top of fast | |
650 | tracepoints, and on top of the buffer we pass it. This works | |
651 | because we've already marked the fast tracepoint fast | |
652 | tracepoint jump uninserted above. Also note that we need to | |
653 | pass the current shadow contents, because | |
654 | write_inferior_memory updates any shadow memory with what we | |
655 | pass here, and we want that to be a nop. */ | |
6bf36717 JK |
656 | buf = alloca (jp->length); |
657 | memcpy (buf, fast_tracepoint_jump_shadow (jp), jp->length); | |
658 | err = write_inferior_memory (jp->pc, buf, jp->length); | |
fa593d66 PA |
659 | if (err != 0) |
660 | { | |
661 | jp->inserted = 1; | |
662 | ||
663 | if (debug_threads) | |
87ce2a04 DE |
664 | debug_printf ("Failed to uninsert fast tracepoint jump at" |
665 | " 0x%s (%s).\n", | |
666 | paddress (pc), strerror (err)); | |
fa593d66 PA |
667 | } |
668 | } | |
669 | } | |
670 | ||
671 | void | |
672 | reinsert_fast_tracepoint_jumps_at (CORE_ADDR where) | |
673 | { | |
674 | struct fast_tracepoint_jump *jp; | |
675 | int err; | |
6bf36717 | 676 | unsigned char *buf; |
fa593d66 PA |
677 | |
678 | jp = find_fast_tracepoint_jump_at (where); | |
679 | if (jp == NULL) | |
680 | { | |
681 | /* This can happen when we remove breakpoints when a tracepoint | |
682 | hit causes a tracing stop, while handling a step-over. */ | |
683 | if (debug_threads) | |
87ce2a04 DE |
684 | debug_printf ("Could not find fast tracepoint jump at 0x%s " |
685 | "in list (reinserting).\n", | |
686 | paddress (where)); | |
fa593d66 PA |
687 | return; |
688 | } | |
689 | ||
690 | if (jp->inserted) | |
691 | error ("Jump already inserted at reinsert time."); | |
692 | ||
693 | jp->inserted = 1; | |
694 | ||
695 | /* Since there can be trap breakpoints inserted in the same address | |
696 | range, we use `write_inferior_memory', which takes care of | |
697 | layering breakpoints on top of fast tracepoints, and on top of | |
698 | the buffer we pass it. This works because we've already marked | |
699 | the fast tracepoint jump inserted above. Also note that we need | |
700 | to pass the current shadow contents, because | |
701 | write_inferior_memory updates any shadow memory with what we pass | |
702 | here, and we want that to be a nop. */ | |
6bf36717 JK |
703 | buf = alloca (jp->length); |
704 | memcpy (buf, fast_tracepoint_jump_shadow (jp), jp->length); | |
705 | err = write_inferior_memory (where, buf, jp->length); | |
fa593d66 PA |
706 | if (err != 0) |
707 | { | |
708 | jp->inserted = 0; | |
709 | ||
710 | if (debug_threads) | |
87ce2a04 DE |
711 | debug_printf ("Failed to reinsert fast tracepoint jump at" |
712 | " 0x%s (%s).\n", | |
713 | paddress (where), strerror (err)); | |
fa593d66 PA |
714 | } |
715 | } | |
716 | ||
802e8e6d PA |
717 | /* Set a high-level breakpoint of type TYPE, with low level type |
718 | RAW_TYPE and size SIZE, at WHERE. On success, a pointer to the new | |
719 | breakpoint is returned. On failure, returns NULL and writes the | |
720 | error code to *ERR. HANDLER is called when the breakpoint is hit. | |
721 | HANDLER should return 1 if the breakpoint should be deleted, 0 | |
722 | otherwise. */ | |
723 | ||
724 | static struct breakpoint * | |
725 | set_breakpoint (enum bkpt_type type, enum raw_bkpt_type raw_type, | |
726 | CORE_ADDR where, int size, | |
727 | int (*handler) (CORE_ADDR), int *err) | |
d50171e4 PA |
728 | { |
729 | struct process_info *proc = current_process (); | |
730 | struct breakpoint *bp; | |
8b07ae33 | 731 | struct raw_breakpoint *raw; |
d50171e4 | 732 | |
802e8e6d | 733 | raw = set_raw_breakpoint_at (raw_type, where, size, err); |
d50171e4 | 734 | |
8b07ae33 | 735 | if (raw == NULL) |
d50171e4 PA |
736 | { |
737 | /* warn? */ | |
414a389f | 738 | return NULL; |
d50171e4 PA |
739 | } |
740 | ||
741 | bp = xcalloc (1, sizeof (struct breakpoint)); | |
802e8e6d | 742 | bp->type = type; |
8b07ae33 PA |
743 | |
744 | bp->raw = raw; | |
611cb4a5 DJ |
745 | bp->handler = handler; |
746 | ||
95954743 PA |
747 | bp->next = proc->breakpoints; |
748 | proc->breakpoints = bp; | |
414a389f PA |
749 | |
750 | return bp; | |
611cb4a5 DJ |
751 | } |
752 | ||
802e8e6d PA |
753 | /* See mem-break.h */ |
754 | ||
755 | struct breakpoint * | |
756 | set_breakpoint_at (CORE_ADDR where, int (*handler) (CORE_ADDR)) | |
757 | { | |
758 | int err_ignored; | |
759 | ||
760 | return set_breakpoint (other_breakpoint, raw_bkpt_type_sw, | |
761 | where, breakpoint_len, handler, | |
762 | &err_ignored); | |
763 | } | |
764 | ||
765 | ||
8b07ae33 PA |
766 | static int |
767 | delete_raw_breakpoint (struct process_info *proc, struct raw_breakpoint *todel) | |
768 | { | |
769 | struct raw_breakpoint *bp, **bp_link; | |
770 | int ret; | |
771 | ||
772 | bp = proc->raw_breakpoints; | |
773 | bp_link = &proc->raw_breakpoints; | |
774 | ||
775 | while (bp) | |
776 | { | |
777 | if (bp == todel) | |
778 | { | |
802e8e6d | 779 | if (bp->inserted > 0) |
8b07ae33 PA |
780 | { |
781 | struct raw_breakpoint *prev_bp_link = *bp_link; | |
782 | ||
783 | *bp_link = bp->next; | |
784 | ||
802e8e6d PA |
785 | ret = the_target->remove_point (bp->raw_type, bp->pc, bp->size, |
786 | bp); | |
8b07ae33 PA |
787 | if (ret != 0) |
788 | { | |
789 | /* Something went wrong, relink the breakpoint. */ | |
790 | *bp_link = prev_bp_link; | |
791 | ||
792 | if (debug_threads) | |
87ce2a04 | 793 | debug_printf ("Failed to uninsert raw breakpoint " |
802e8e6d PA |
794 | "at 0x%s while deleting it.\n", |
795 | paddress (bp->pc)); | |
8b07ae33 PA |
796 | return ret; |
797 | } | |
8b07ae33 PA |
798 | } |
799 | else | |
800 | *bp_link = bp->next; | |
801 | ||
802 | free (bp); | |
803 | return 0; | |
804 | } | |
805 | else | |
806 | { | |
807 | bp_link = &bp->next; | |
808 | bp = *bp_link; | |
809 | } | |
810 | } | |
811 | ||
812 | warning ("Could not find raw breakpoint in list."); | |
813 | return ENOENT; | |
814 | } | |
815 | ||
816 | static int | |
817 | release_breakpoint (struct process_info *proc, struct breakpoint *bp) | |
818 | { | |
819 | int newrefcount; | |
820 | int ret; | |
821 | ||
822 | newrefcount = bp->raw->refcount - 1; | |
823 | if (newrefcount == 0) | |
824 | { | |
825 | ret = delete_raw_breakpoint (proc, bp->raw); | |
826 | if (ret != 0) | |
827 | return ret; | |
828 | } | |
829 | else | |
830 | bp->raw->refcount = newrefcount; | |
831 | ||
832 | free (bp); | |
833 | ||
834 | return 0; | |
835 | } | |
836 | ||
837 | static int | |
838 | delete_breakpoint_1 (struct process_info *proc, struct breakpoint *todel) | |
611cb4a5 | 839 | { |
414a389f | 840 | struct breakpoint *bp, **bp_link; |
8b07ae33 | 841 | int err; |
611cb4a5 | 842 | |
414a389f PA |
843 | bp = proc->breakpoints; |
844 | bp_link = &proc->breakpoints; | |
845 | ||
846 | while (bp) | |
611cb4a5 | 847 | { |
414a389f | 848 | if (bp == todel) |
611cb4a5 | 849 | { |
414a389f PA |
850 | *bp_link = bp->next; |
851 | ||
8b07ae33 PA |
852 | err = release_breakpoint (proc, bp); |
853 | if (err != 0) | |
854 | return err; | |
855 | ||
856 | bp = *bp_link; | |
857 | return 0; | |
611cb4a5 | 858 | } |
414a389f PA |
859 | else |
860 | { | |
861 | bp_link = &bp->next; | |
862 | bp = *bp_link; | |
863 | } | |
611cb4a5 | 864 | } |
414a389f | 865 | |
611cb4a5 | 866 | warning ("Could not find breakpoint in list."); |
8b07ae33 PA |
867 | return ENOENT; |
868 | } | |
869 | ||
219f2f23 | 870 | int |
8b07ae33 PA |
871 | delete_breakpoint (struct breakpoint *todel) |
872 | { | |
873 | struct process_info *proc = current_process (); | |
874 | return delete_breakpoint_1 (proc, todel); | |
611cb4a5 DJ |
875 | } |
876 | ||
802e8e6d PA |
877 | /* Locate a GDB breakpoint of type Z_TYPE and size SIZE placed at |
878 | address ADDR and return a pointer to its structure. If SIZE is -1, | |
879 | the breakpoints' sizes are ignored. */ | |
51aa91f9 PA |
880 | |
881 | static struct breakpoint * | |
802e8e6d | 882 | find_gdb_breakpoint (char z_type, CORE_ADDR addr, int size) |
611cb4a5 | 883 | { |
95954743 | 884 | struct process_info *proc = current_process (); |
8b07ae33 | 885 | struct breakpoint *bp; |
802e8e6d | 886 | enum bkpt_type type = Z_packet_to_bkpt_type (z_type); |
611cb4a5 | 887 | |
8b07ae33 | 888 | for (bp = proc->breakpoints; bp != NULL; bp = bp->next) |
802e8e6d PA |
889 | if (bp->type == type && bp->raw->pc == addr |
890 | && (size == -1 || bp->raw->size == size)) | |
8b07ae33 | 891 | return bp; |
611cb4a5 DJ |
892 | |
893 | return NULL; | |
894 | } | |
895 | ||
802e8e6d PA |
896 | static int |
897 | z_type_supported (char z_type) | |
898 | { | |
899 | return (z_type >= '0' && z_type <= '4' | |
ef7cab6b | 900 | && the_target->supports_z_point_type != NULL |
802e8e6d PA |
901 | && the_target->supports_z_point_type (z_type)); |
902 | } | |
903 | ||
904 | /* Create a new GDB breakpoint of type Z_TYPE at ADDR with size SIZE. | |
905 | Returns a pointer to the newly created breakpoint on success. On | |
906 | failure returns NULL and sets *ERR to either -1 for error, or 1 if | |
907 | Z_TYPE breakpoints are not supported on this target. */ | |
908 | ||
909 | static struct breakpoint * | |
910 | set_gdb_breakpoint_1 (char z_type, CORE_ADDR addr, int size, int *err) | |
68070c10 | 911 | { |
8b07ae33 | 912 | struct breakpoint *bp; |
802e8e6d PA |
913 | enum bkpt_type type; |
914 | enum raw_bkpt_type raw_type; | |
915 | ||
916 | /* If we see GDB inserting a second code breakpoint at the same | |
917 | address, then either: GDB is updating the breakpoint's conditions | |
918 | or commands; or, the first breakpoint must have disappeared due | |
919 | to a shared library unload. On targets where the shared | |
920 | libraries are handled by userspace, like SVR4, for example, | |
921 | GDBserver can't tell if a library was loaded or unloaded. Since | |
922 | we refcount raw breakpoints, we must be careful to make sure GDB | |
923 | breakpoints never contribute more than one reference. if we | |
924 | didn't do this, in case the previous breakpoint is gone due to a | |
925 | shared library unload, we'd just increase the refcount of the | |
926 | previous breakpoint at this address, but the trap was not planted | |
927 | in the inferior anymore, thus the breakpoint would never be hit. | |
928 | Note this must be careful to not create a window where | |
929 | breakpoints are removed from the target, for non-stop, in case | |
930 | the target can poke at memory while the program is running. */ | |
931 | if (z_type == Z_PACKET_SW_BP | |
932 | || z_type == Z_PACKET_HW_BP) | |
933 | { | |
934 | bp = find_gdb_breakpoint (z_type, addr, -1); | |
8b07ae33 | 935 | |
802e8e6d PA |
936 | if (bp != NULL) |
937 | { | |
938 | if (bp->raw->size != size) | |
939 | { | |
940 | /* A different size than previously seen. The previous | |
941 | breakpoint must be gone then. */ | |
942 | bp->raw->inserted = -1; | |
943 | delete_breakpoint (bp); | |
944 | bp = NULL; | |
945 | } | |
946 | else if (z_type == Z_PACKET_SW_BP) | |
947 | { | |
948 | /* Check if the breakpoint is actually gone from the | |
949 | target, due to an solib unload, for example. Might | |
950 | as well validate _all_ breakpoints. */ | |
951 | validate_breakpoints (); | |
952 | ||
953 | /* Breakpoints that don't pass validation are | |
954 | deleted. */ | |
955 | bp = find_gdb_breakpoint (z_type, addr, -1); | |
956 | } | |
957 | } | |
958 | } | |
959 | else | |
960 | { | |
961 | /* Data breakpoints for the same address but different size are | |
962 | expected. GDB doesn't merge these. The backend gets to do | |
963 | that if it wants/can. */ | |
964 | bp = find_gdb_breakpoint (z_type, addr, size); | |
965 | } | |
8b07ae33 | 966 | |
d3bbe7a0 PA |
967 | if (bp != NULL) |
968 | { | |
802e8e6d PA |
969 | /* We already know about this breakpoint, there's nothing else |
970 | to do - GDB's reference is already accounted for. Note that | |
971 | whether the breakpoint inserted is left as is - we may be | |
972 | stepping over it, for example, in which case we don't want to | |
973 | force-reinsert it. */ | |
974 | return bp; | |
975 | } | |
976 | ||
977 | raw_type = Z_packet_to_raw_bkpt_type (z_type); | |
978 | type = Z_packet_to_bkpt_type (z_type); | |
979 | return set_breakpoint (type, raw_type, addr, size, NULL, err); | |
980 | } | |
981 | ||
982 | static int | |
983 | check_gdb_bp_preconditions (char z_type, int *err) | |
984 | { | |
985 | /* As software/memory breakpoints work by poking at memory, we need | |
986 | to prepare to access memory. If that operation fails, we need to | |
987 | return error. Seeing an error, if this is the first breakpoint | |
988 | of that type that GDB tries to insert, GDB would then assume the | |
989 | breakpoint type is supported, but it may actually not be. So we | |
990 | need to check whether the type is supported at all before | |
991 | preparing to access memory. */ | |
992 | if (!z_type_supported (z_type)) | |
993 | { | |
994 | *err = 1; | |
995 | return 0; | |
996 | } | |
997 | else if (current_inferior == NULL) | |
998 | { | |
999 | *err = -1; | |
1000 | return 0; | |
1001 | } | |
1002 | else | |
1003 | return 1; | |
1004 | } | |
1005 | ||
1006 | /* See mem-break.h. This is a wrapper for set_gdb_breakpoint_1 that | |
1007 | knows to prepare to access memory for Z0 breakpoints. */ | |
d3bbe7a0 | 1008 | |
802e8e6d PA |
1009 | struct breakpoint * |
1010 | set_gdb_breakpoint (char z_type, CORE_ADDR addr, int size, int *err) | |
1011 | { | |
1012 | struct breakpoint *bp; | |
1013 | ||
1014 | if (!check_gdb_bp_preconditions (z_type, err)) | |
1015 | return NULL; | |
1016 | ||
1017 | /* If inserting a software/memory breakpoint, need to prepare to | |
1018 | access memory. */ | |
1019 | if (z_type == Z_PACKET_SW_BP) | |
1020 | { | |
1021 | *err = prepare_to_access_memory (); | |
1022 | if (*err != 0) | |
1023 | return NULL; | |
d3bbe7a0 PA |
1024 | } |
1025 | ||
802e8e6d | 1026 | bp = set_gdb_breakpoint_1 (z_type, addr, size, err); |
8b07ae33 | 1027 | |
802e8e6d PA |
1028 | if (z_type == Z_PACKET_SW_BP) |
1029 | done_accessing_memory (); | |
1030 | ||
1031 | return bp; | |
8b07ae33 PA |
1032 | } |
1033 | ||
802e8e6d PA |
1034 | /* Delete a GDB breakpoint of type Z_TYPE and size SIZE previously |
1035 | inserted at ADDR with set_gdb_breakpoint_at. Returns 0 on success, | |
1036 | -1 on error, and 1 if Z_TYPE breakpoints are not supported on this | |
1037 | target. */ | |
1038 | ||
1039 | static int | |
1040 | delete_gdb_breakpoint_1 (char z_type, CORE_ADDR addr, int size) | |
8b07ae33 PA |
1041 | { |
1042 | struct breakpoint *bp; | |
1043 | int err; | |
1044 | ||
802e8e6d | 1045 | bp = find_gdb_breakpoint (z_type, addr, size); |
8b07ae33 PA |
1046 | if (bp == NULL) |
1047 | return -1; | |
1048 | ||
0a261ed8 PA |
1049 | /* Before deleting the breakpoint, make sure to free its condition |
1050 | and command lists. */ | |
1051 | clear_breakpoint_conditions_and_commands (bp); | |
8b07ae33 | 1052 | err = delete_breakpoint (bp); |
802e8e6d | 1053 | if (err != 0) |
8b07ae33 PA |
1054 | return -1; |
1055 | ||
1056 | return 0; | |
1057 | } | |
1058 | ||
802e8e6d PA |
1059 | /* See mem-break.h. This is a wrapper for delete_gdb_breakpoint that |
1060 | knows to prepare to access memory for Z0 breakpoints. */ | |
1061 | ||
1062 | int | |
1063 | delete_gdb_breakpoint (char z_type, CORE_ADDR addr, int size) | |
1064 | { | |
1065 | int ret; | |
1066 | ||
1067 | if (!check_gdb_bp_preconditions (z_type, &ret)) | |
1068 | return ret; | |
1069 | ||
1070 | /* If inserting a software/memory breakpoint, need to prepare to | |
1071 | access memory. */ | |
1072 | if (z_type == Z_PACKET_SW_BP) | |
1073 | { | |
1074 | int err; | |
1075 | ||
1076 | err = prepare_to_access_memory (); | |
1077 | if (err != 0) | |
1078 | return -1; | |
1079 | } | |
1080 | ||
1081 | ret = delete_gdb_breakpoint_1 (z_type, addr, size); | |
1082 | ||
1083 | if (z_type == Z_PACKET_SW_BP) | |
1084 | done_accessing_memory (); | |
1085 | ||
1086 | return ret; | |
1087 | } | |
1088 | ||
1089 | /* Clear all conditions associated with a breakpoint. */ | |
9f3a5c85 | 1090 | |
0a261ed8 | 1091 | static void |
802e8e6d | 1092 | clear_breakpoint_conditions (struct breakpoint *bp) |
9f3a5c85 | 1093 | { |
412c89dd | 1094 | struct point_cond_list *cond; |
9f3a5c85 | 1095 | |
802e8e6d | 1096 | if (bp->cond_list == NULL) |
9f3a5c85 LM |
1097 | return; |
1098 | ||
1099 | cond = bp->cond_list; | |
9f3a5c85 LM |
1100 | |
1101 | while (cond != NULL) | |
1102 | { | |
412c89dd LM |
1103 | struct point_cond_list *cond_next; |
1104 | ||
1105 | cond_next = cond->next; | |
0a261ed8 | 1106 | gdb_free_agent_expr (cond->cond); |
9f3a5c85 | 1107 | free (cond); |
412c89dd | 1108 | cond = cond_next; |
9f3a5c85 LM |
1109 | } |
1110 | ||
1111 | bp->cond_list = NULL; | |
1112 | } | |
1113 | ||
0a261ed8 PA |
1114 | /* Clear all commands associated with a breakpoint. */ |
1115 | ||
1116 | static void | |
1117 | clear_breakpoint_commands (struct breakpoint *bp) | |
1118 | { | |
1119 | struct point_command_list *cmd; | |
1120 | ||
1121 | if (bp->command_list == NULL) | |
1122 | return; | |
1123 | ||
1124 | cmd = bp->command_list; | |
1125 | ||
1126 | while (cmd != NULL) | |
1127 | { | |
1128 | struct point_command_list *cmd_next; | |
1129 | ||
1130 | cmd_next = cmd->next; | |
1131 | gdb_free_agent_expr (cmd->cmd); | |
1132 | free (cmd); | |
1133 | cmd = cmd_next; | |
1134 | } | |
1135 | ||
1136 | bp->command_list = NULL; | |
1137 | } | |
1138 | ||
1139 | void | |
1140 | clear_breakpoint_conditions_and_commands (struct breakpoint *bp) | |
1141 | { | |
1142 | clear_breakpoint_conditions (bp); | |
1143 | clear_breakpoint_commands (bp); | |
1144 | } | |
1145 | ||
9f3a5c85 LM |
1146 | /* Add condition CONDITION to GDBserver's breakpoint BP. */ |
1147 | ||
802e8e6d | 1148 | static void |
9f3a5c85 LM |
1149 | add_condition_to_breakpoint (struct breakpoint *bp, |
1150 | struct agent_expr *condition) | |
1151 | { | |
1152 | struct point_cond_list *new_cond; | |
1153 | ||
1154 | /* Create new condition. */ | |
1155 | new_cond = xcalloc (1, sizeof (*new_cond)); | |
1156 | new_cond->cond = condition; | |
1157 | ||
1158 | /* Add condition to the list. */ | |
1159 | new_cond->next = bp->cond_list; | |
1160 | bp->cond_list = new_cond; | |
1161 | } | |
1162 | ||
802e8e6d | 1163 | /* Add a target-side condition CONDITION to a breakpoint. */ |
9f3a5c85 | 1164 | |
8b07ae33 | 1165 | int |
802e8e6d | 1166 | add_breakpoint_condition (struct breakpoint *bp, char **condition) |
9f3a5c85 | 1167 | { |
9f3a5c85 LM |
1168 | char *actparm = *condition; |
1169 | struct agent_expr *cond; | |
1170 | ||
9f3a5c85 LM |
1171 | if (condition == NULL) |
1172 | return 1; | |
1173 | ||
d708bcd1 PA |
1174 | if (bp == NULL) |
1175 | return 0; | |
1176 | ||
9f3a5c85 LM |
1177 | cond = gdb_parse_agent_expr (&actparm); |
1178 | ||
1179 | if (cond == NULL) | |
1180 | { | |
1181 | fprintf (stderr, "Condition evaluation failed. " | |
1182 | "Assuming unconditional.\n"); | |
1183 | return 0; | |
1184 | } | |
1185 | ||
1186 | add_condition_to_breakpoint (bp, cond); | |
1187 | ||
1188 | *condition = actparm; | |
1189 | ||
d708bcd1 | 1190 | return 1; |
9f3a5c85 LM |
1191 | } |
1192 | ||
1193 | /* Evaluate condition (if any) at breakpoint BP. Return 1 if | |
1194 | true and 0 otherwise. */ | |
1195 | ||
802e8e6d PA |
1196 | static int |
1197 | gdb_condition_true_at_breakpoint_z_type (char z_type, CORE_ADDR addr) | |
8b07ae33 | 1198 | { |
9f3a5c85 | 1199 | /* Fetch registers for the current inferior. */ |
802e8e6d | 1200 | struct breakpoint *bp = find_gdb_breakpoint (z_type, addr, -1); |
9f3a5c85 LM |
1201 | ULONGEST value = 0; |
1202 | struct point_cond_list *cl; | |
1203 | int err = 0; | |
5ae4861a | 1204 | struct eval_agent_expr_context ctx; |
9f3a5c85 LM |
1205 | |
1206 | if (bp == NULL) | |
1207 | return 0; | |
8b07ae33 | 1208 | |
9f3a5c85 LM |
1209 | /* Check if the breakpoint is unconditional. If it is, |
1210 | the condition always evaluates to TRUE. */ | |
1211 | if (bp->cond_list == NULL) | |
1212 | return 1; | |
1213 | ||
5ae4861a YQ |
1214 | ctx.regcache = get_thread_regcache (current_inferior, 1); |
1215 | ctx.tframe = NULL; | |
1216 | ctx.tpoint = NULL; | |
1217 | ||
9f3a5c85 LM |
1218 | /* Evaluate each condition in the breakpoint's list of conditions. |
1219 | Return true if any of the conditions evaluates to TRUE. | |
1220 | ||
1221 | If we failed to evaluate the expression, TRUE is returned. This | |
1222 | forces GDB to reevaluate the conditions. */ | |
1223 | for (cl = bp->cond_list; | |
1224 | cl && !value && !err; cl = cl->next) | |
1225 | { | |
1226 | /* Evaluate the condition. */ | |
5ae4861a | 1227 | err = gdb_eval_agent_expr (&ctx, cl->cond, &value); |
9f3a5c85 LM |
1228 | } |
1229 | ||
1230 | if (err) | |
1231 | return 1; | |
1232 | ||
1233 | return (value != 0); | |
1234 | } | |
1235 | ||
802e8e6d PA |
1236 | int |
1237 | gdb_condition_true_at_breakpoint (CORE_ADDR where) | |
1238 | { | |
1239 | /* Only check code (software or hardware) breakpoints. */ | |
1240 | return (gdb_condition_true_at_breakpoint_z_type (Z_PACKET_SW_BP, where) | |
1241 | || gdb_condition_true_at_breakpoint_z_type (Z_PACKET_HW_BP, where)); | |
1242 | } | |
1243 | ||
d3ce09f5 SS |
1244 | /* Add commands COMMANDS to GDBserver's breakpoint BP. */ |
1245 | ||
1246 | void | |
1247 | add_commands_to_breakpoint (struct breakpoint *bp, | |
1248 | struct agent_expr *commands, int persist) | |
1249 | { | |
1250 | struct point_command_list *new_cmd; | |
1251 | ||
1252 | /* Create new command. */ | |
1253 | new_cmd = xcalloc (1, sizeof (*new_cmd)); | |
1254 | new_cmd->cmd = commands; | |
1255 | new_cmd->persistence = persist; | |
1256 | ||
1257 | /* Add commands to the list. */ | |
1258 | new_cmd->next = bp->command_list; | |
1259 | bp->command_list = new_cmd; | |
1260 | } | |
1261 | ||
1262 | /* Add a target-side command COMMAND to the breakpoint at ADDR. */ | |
1263 | ||
1264 | int | |
802e8e6d PA |
1265 | add_breakpoint_commands (struct breakpoint *bp, char **command, |
1266 | int persist) | |
d3ce09f5 | 1267 | { |
d3ce09f5 SS |
1268 | char *actparm = *command; |
1269 | struct agent_expr *cmd; | |
1270 | ||
d3ce09f5 SS |
1271 | if (command == NULL) |
1272 | return 1; | |
1273 | ||
d708bcd1 PA |
1274 | if (bp == NULL) |
1275 | return 0; | |
1276 | ||
d3ce09f5 SS |
1277 | cmd = gdb_parse_agent_expr (&actparm); |
1278 | ||
1279 | if (cmd == NULL) | |
1280 | { | |
1281 | fprintf (stderr, "Command evaluation failed. " | |
1282 | "Disabling.\n"); | |
1283 | return 0; | |
1284 | } | |
1285 | ||
1286 | add_commands_to_breakpoint (bp, cmd, persist); | |
1287 | ||
1288 | *command = actparm; | |
1289 | ||
d708bcd1 | 1290 | return 1; |
d3ce09f5 SS |
1291 | } |
1292 | ||
1293 | /* Return true if there are no commands to run at this location, | |
1294 | which likely means we want to report back to GDB. */ | |
802e8e6d PA |
1295 | |
1296 | static int | |
1297 | gdb_no_commands_at_breakpoint_z_type (char z_type, CORE_ADDR addr) | |
d3ce09f5 | 1298 | { |
802e8e6d | 1299 | struct breakpoint *bp = find_gdb_breakpoint (z_type, addr, -1); |
d3ce09f5 SS |
1300 | |
1301 | if (bp == NULL) | |
802e8e6d | 1302 | return 1; |
d3ce09f5 SS |
1303 | |
1304 | if (debug_threads) | |
802e8e6d PA |
1305 | debug_printf ("at 0x%s, type Z%c, bp command_list is 0x%s\n", |
1306 | paddress (addr), z_type, | |
87ce2a04 | 1307 | phex_nz ((uintptr_t) bp->command_list, 0)); |
d3ce09f5 SS |
1308 | return (bp->command_list == NULL); |
1309 | } | |
1310 | ||
802e8e6d PA |
1311 | /* Return true if there are no commands to run at this location, |
1312 | which likely means we want to report back to GDB. */ | |
1313 | ||
1314 | int | |
1315 | gdb_no_commands_at_breakpoint (CORE_ADDR where) | |
1316 | { | |
1317 | /* Only check code (software or hardware) breakpoints. */ | |
1318 | return (gdb_no_commands_at_breakpoint_z_type (Z_PACKET_SW_BP, where) | |
1319 | && gdb_no_commands_at_breakpoint_z_type (Z_PACKET_HW_BP, where)); | |
1320 | } | |
1321 | ||
1322 | /* Run a breakpoint's commands. Returns 0 if there was a problem | |
1323 | running any command, 1 otherwise. */ | |
1324 | ||
1325 | static int | |
1326 | run_breakpoint_commands_z_type (char z_type, CORE_ADDR addr) | |
d3ce09f5 SS |
1327 | { |
1328 | /* Fetch registers for the current inferior. */ | |
802e8e6d | 1329 | struct breakpoint *bp = find_gdb_breakpoint (z_type, addr, -1); |
d3ce09f5 SS |
1330 | ULONGEST value = 0; |
1331 | struct point_command_list *cl; | |
1332 | int err = 0; | |
5ae4861a | 1333 | struct eval_agent_expr_context ctx; |
d3ce09f5 SS |
1334 | |
1335 | if (bp == NULL) | |
802e8e6d | 1336 | return 1; |
d3ce09f5 | 1337 | |
5ae4861a YQ |
1338 | ctx.regcache = get_thread_regcache (current_inferior, 1); |
1339 | ctx.tframe = NULL; | |
1340 | ctx.tpoint = NULL; | |
1341 | ||
d3ce09f5 SS |
1342 | for (cl = bp->command_list; |
1343 | cl && !value && !err; cl = cl->next) | |
1344 | { | |
1345 | /* Run the command. */ | |
5ae4861a | 1346 | err = gdb_eval_agent_expr (&ctx, cl->cmd, &value); |
d3ce09f5 SS |
1347 | |
1348 | /* If one command has a problem, stop digging the hole deeper. */ | |
1349 | if (err) | |
802e8e6d | 1350 | return 0; |
d3ce09f5 | 1351 | } |
802e8e6d PA |
1352 | |
1353 | return 1; | |
d3ce09f5 SS |
1354 | } |
1355 | ||
802e8e6d PA |
1356 | void |
1357 | run_breakpoint_commands (CORE_ADDR where) | |
1358 | { | |
1359 | /* Only check code (software or hardware) breakpoints. If one | |
1360 | command has a problem, stop digging the hole deeper. */ | |
1361 | if (run_breakpoint_commands_z_type (Z_PACKET_SW_BP, where)) | |
1362 | run_breakpoint_commands_z_type (Z_PACKET_HW_BP, where); | |
1363 | } | |
1364 | ||
1365 | /* See mem-break.h. */ | |
9f3a5c85 LM |
1366 | |
1367 | int | |
1368 | gdb_breakpoint_here (CORE_ADDR where) | |
1369 | { | |
802e8e6d PA |
1370 | /* Only check code (software or hardware) breakpoints. */ |
1371 | return (find_gdb_breakpoint (Z_PACKET_SW_BP, where, -1) != NULL | |
1372 | || find_gdb_breakpoint (Z_PACKET_HW_BP, where, -1) != NULL); | |
68070c10 PA |
1373 | } |
1374 | ||
d50171e4 PA |
1375 | void |
1376 | set_reinsert_breakpoint (CORE_ADDR stop_at) | |
611cb4a5 | 1377 | { |
414a389f PA |
1378 | struct breakpoint *bp; |
1379 | ||
1380 | bp = set_breakpoint_at (stop_at, NULL); | |
414a389f | 1381 | bp->type = reinsert_breakpoint; |
611cb4a5 DJ |
1382 | } |
1383 | ||
1384 | void | |
d50171e4 | 1385 | delete_reinsert_breakpoints (void) |
611cb4a5 | 1386 | { |
d50171e4 PA |
1387 | struct process_info *proc = current_process (); |
1388 | struct breakpoint *bp, **bp_link; | |
611cb4a5 | 1389 | |
d50171e4 PA |
1390 | bp = proc->breakpoints; |
1391 | bp_link = &proc->breakpoints; | |
611cb4a5 | 1392 | |
d50171e4 PA |
1393 | while (bp) |
1394 | { | |
414a389f PA |
1395 | if (bp->type == reinsert_breakpoint) |
1396 | { | |
1397 | *bp_link = bp->next; | |
8b07ae33 | 1398 | release_breakpoint (proc, bp); |
414a389f PA |
1399 | bp = *bp_link; |
1400 | } | |
1401 | else | |
1402 | { | |
1403 | bp_link = &bp->next; | |
1404 | bp = *bp_link; | |
1405 | } | |
d50171e4 PA |
1406 | } |
1407 | } | |
b65d95c5 | 1408 | |
d50171e4 | 1409 | static void |
8b07ae33 | 1410 | uninsert_raw_breakpoint (struct raw_breakpoint *bp) |
d50171e4 | 1411 | { |
802e8e6d PA |
1412 | if (bp->inserted < 0) |
1413 | { | |
1414 | if (debug_threads) | |
1415 | debug_printf ("Breakpoint at %s is marked insert-disabled.\n", | |
1416 | paddress (bp->pc)); | |
1417 | } | |
1418 | else if (bp->inserted > 0) | |
d50171e4 PA |
1419 | { |
1420 | int err; | |
1421 | ||
1422 | bp->inserted = 0; | |
802e8e6d PA |
1423 | |
1424 | err = the_target->remove_point (bp->raw_type, bp->pc, bp->size, bp); | |
d50171e4 PA |
1425 | if (err != 0) |
1426 | { | |
1427 | bp->inserted = 1; | |
611cb4a5 | 1428 | |
d50171e4 | 1429 | if (debug_threads) |
802e8e6d PA |
1430 | debug_printf ("Failed to uninsert raw breakpoint at 0x%s.\n", |
1431 | paddress (bp->pc)); | |
d50171e4 PA |
1432 | } |
1433 | } | |
611cb4a5 DJ |
1434 | } |
1435 | ||
1436 | void | |
d50171e4 | 1437 | uninsert_breakpoints_at (CORE_ADDR pc) |
611cb4a5 | 1438 | { |
802e8e6d | 1439 | struct process_info *proc = current_process (); |
8b07ae33 | 1440 | struct raw_breakpoint *bp; |
802e8e6d | 1441 | int found = 0; |
611cb4a5 | 1442 | |
802e8e6d PA |
1443 | for (bp = proc->raw_breakpoints; bp != NULL; bp = bp->next) |
1444 | if ((bp->raw_type == raw_bkpt_type_sw | |
1445 | || bp->raw_type == raw_bkpt_type_hw) | |
1446 | && bp->pc == pc) | |
1447 | { | |
1448 | found = 1; | |
1449 | ||
1450 | if (bp->inserted) | |
1451 | uninsert_raw_breakpoint (bp); | |
1452 | } | |
1453 | ||
1454 | if (!found) | |
d50171e4 PA |
1455 | { |
1456 | /* This can happen when we remove all breakpoints while handling | |
1457 | a step-over. */ | |
1458 | if (debug_threads) | |
87ce2a04 DE |
1459 | debug_printf ("Could not find breakpoint at 0x%s " |
1460 | "in list (uninserting).\n", | |
1461 | paddress (pc)); | |
d50171e4 | 1462 | } |
611cb4a5 DJ |
1463 | } |
1464 | ||
0fb4aa4b PA |
1465 | void |
1466 | uninsert_all_breakpoints (void) | |
1467 | { | |
1468 | struct process_info *proc = current_process (); | |
1469 | struct raw_breakpoint *bp; | |
1470 | ||
1471 | for (bp = proc->raw_breakpoints; bp != NULL; bp = bp->next) | |
802e8e6d PA |
1472 | if ((bp->raw_type == raw_bkpt_type_sw |
1473 | || bp->raw_type == raw_bkpt_type_hw) | |
1474 | && bp->inserted) | |
0fb4aa4b PA |
1475 | uninsert_raw_breakpoint (bp); |
1476 | } | |
1477 | ||
d50171e4 | 1478 | static void |
8b07ae33 | 1479 | reinsert_raw_breakpoint (struct raw_breakpoint *bp) |
611cb4a5 | 1480 | { |
d50171e4 | 1481 | int err; |
611cb4a5 | 1482 | |
d50171e4 | 1483 | if (bp->inserted) |
611cb4a5 DJ |
1484 | error ("Breakpoint already inserted at reinsert time."); |
1485 | ||
802e8e6d | 1486 | err = the_target->insert_point (bp->raw_type, bp->pc, bp->size, bp); |
d50171e4 PA |
1487 | if (err == 0) |
1488 | bp->inserted = 1; | |
1489 | else if (debug_threads) | |
802e8e6d PA |
1490 | debug_printf ("Failed to reinsert breakpoint at 0x%s (%d).\n", |
1491 | paddress (bp->pc), err); | |
611cb4a5 DJ |
1492 | } |
1493 | ||
d50171e4 PA |
1494 | void |
1495 | reinsert_breakpoints_at (CORE_ADDR pc) | |
611cb4a5 | 1496 | { |
802e8e6d | 1497 | struct process_info *proc = current_process (); |
8b07ae33 | 1498 | struct raw_breakpoint *bp; |
802e8e6d | 1499 | int found = 0; |
611cb4a5 | 1500 | |
802e8e6d PA |
1501 | for (bp = proc->raw_breakpoints; bp != NULL; bp = bp->next) |
1502 | if ((bp->raw_type == raw_bkpt_type_sw | |
1503 | || bp->raw_type == raw_bkpt_type_hw) | |
1504 | && bp->pc == pc) | |
1505 | { | |
1506 | found = 1; | |
1507 | ||
1508 | reinsert_raw_breakpoint (bp); | |
1509 | } | |
1510 | ||
1511 | if (!found) | |
611cb4a5 | 1512 | { |
d50171e4 PA |
1513 | /* This can happen when we remove all breakpoints while handling |
1514 | a step-over. */ | |
1515 | if (debug_threads) | |
87ce2a04 DE |
1516 | debug_printf ("Could not find raw breakpoint at 0x%s " |
1517 | "in list (reinserting).\n", | |
1518 | paddress (pc)); | |
611cb4a5 | 1519 | } |
d50171e4 PA |
1520 | } |
1521 | ||
0fb4aa4b PA |
1522 | void |
1523 | reinsert_all_breakpoints (void) | |
1524 | { | |
1525 | struct process_info *proc = current_process (); | |
1526 | struct raw_breakpoint *bp; | |
1527 | ||
1528 | for (bp = proc->raw_breakpoints; bp != NULL; bp = bp->next) | |
802e8e6d PA |
1529 | if ((bp->raw_type == raw_bkpt_type_sw |
1530 | || bp->raw_type == raw_bkpt_type_hw) | |
1531 | && !bp->inserted) | |
0fb4aa4b PA |
1532 | reinsert_raw_breakpoint (bp); |
1533 | } | |
1534 | ||
d50171e4 PA |
1535 | void |
1536 | check_breakpoints (CORE_ADDR stop_pc) | |
1537 | { | |
1538 | struct process_info *proc = current_process (); | |
1539 | struct breakpoint *bp, **bp_link; | |
1540 | ||
1541 | bp = proc->breakpoints; | |
1542 | bp_link = &proc->breakpoints; | |
1543 | ||
1544 | while (bp) | |
b65d95c5 | 1545 | { |
802e8e6d PA |
1546 | struct raw_breakpoint *raw = bp->raw; |
1547 | ||
1548 | if ((raw->raw_type == raw_bkpt_type_sw | |
1549 | || raw->raw_type == raw_bkpt_type_hw) | |
1550 | && raw->pc == stop_pc) | |
d50171e4 | 1551 | { |
802e8e6d | 1552 | if (!raw->inserted) |
d50171e4 PA |
1553 | { |
1554 | warning ("Hit a removed breakpoint?"); | |
1555 | return; | |
1556 | } | |
1557 | ||
1558 | if (bp->handler != NULL && (*bp->handler) (stop_pc)) | |
1559 | { | |
1560 | *bp_link = bp->next; | |
1561 | ||
8b07ae33 | 1562 | release_breakpoint (proc, bp); |
d50171e4 PA |
1563 | |
1564 | bp = *bp_link; | |
1565 | continue; | |
1566 | } | |
1567 | } | |
1568 | ||
1569 | bp_link = &bp->next; | |
1570 | bp = *bp_link; | |
b65d95c5 | 1571 | } |
611cb4a5 DJ |
1572 | } |
1573 | ||
1574 | void | |
f450004a | 1575 | set_breakpoint_data (const unsigned char *bp_data, int bp_len) |
611cb4a5 DJ |
1576 | { |
1577 | breakpoint_data = bp_data; | |
1578 | breakpoint_len = bp_len; | |
1579 | } | |
1580 | ||
d50171e4 PA |
1581 | int |
1582 | breakpoint_here (CORE_ADDR addr) | |
1583 | { | |
802e8e6d PA |
1584 | struct process_info *proc = current_process (); |
1585 | struct raw_breakpoint *bp; | |
1586 | ||
1587 | for (bp = proc->raw_breakpoints; bp != NULL; bp = bp->next) | |
1588 | if ((bp->raw_type == raw_bkpt_type_sw | |
1589 | || bp->raw_type == raw_bkpt_type_hw) | |
1590 | && bp->pc == addr) | |
1591 | return 1; | |
1592 | ||
1593 | return 0; | |
d50171e4 PA |
1594 | } |
1595 | ||
1596 | int | |
1597 | breakpoint_inserted_here (CORE_ADDR addr) | |
1598 | { | |
802e8e6d | 1599 | struct process_info *proc = current_process (); |
8b07ae33 | 1600 | struct raw_breakpoint *bp; |
d50171e4 | 1601 | |
802e8e6d PA |
1602 | for (bp = proc->raw_breakpoints; bp != NULL; bp = bp->next) |
1603 | if ((bp->raw_type == raw_bkpt_type_sw | |
1604 | || bp->raw_type == raw_bkpt_type_hw) | |
1605 | && bp->pc == addr | |
1606 | && bp->inserted) | |
1607 | return 1; | |
d50171e4 | 1608 | |
802e8e6d | 1609 | return 0; |
d50171e4 PA |
1610 | } |
1611 | ||
d3bbe7a0 PA |
1612 | static int |
1613 | validate_inserted_breakpoint (struct raw_breakpoint *bp) | |
1614 | { | |
1615 | unsigned char *buf; | |
1616 | int err; | |
1617 | ||
1618 | gdb_assert (bp->inserted); | |
802e8e6d | 1619 | gdb_assert (bp->raw_type == raw_bkpt_type_sw); |
d3bbe7a0 PA |
1620 | |
1621 | buf = alloca (breakpoint_len); | |
1622 | err = (*the_target->read_memory) (bp->pc, buf, breakpoint_len); | |
1623 | if (err || memcmp (buf, breakpoint_data, breakpoint_len) != 0) | |
1624 | { | |
1625 | /* Tag it as gone. */ | |
802e8e6d | 1626 | bp->inserted = -1; |
d3bbe7a0 PA |
1627 | return 0; |
1628 | } | |
1629 | ||
1630 | return 1; | |
1631 | } | |
1632 | ||
1633 | static void | |
1634 | delete_disabled_breakpoints (void) | |
1635 | { | |
1636 | struct process_info *proc = current_process (); | |
1637 | struct breakpoint *bp, *next; | |
1638 | ||
1639 | for (bp = proc->breakpoints; bp != NULL; bp = next) | |
1640 | { | |
1641 | next = bp->next; | |
802e8e6d | 1642 | if (bp->raw->inserted < 0) |
d3bbe7a0 PA |
1643 | delete_breakpoint_1 (proc, bp); |
1644 | } | |
1645 | } | |
1646 | ||
1647 | /* Check if breakpoints we inserted still appear to be inserted. They | |
1648 | may disappear due to a shared library unload, and worse, a new | |
1649 | shared library may be reloaded at the same address as the | |
1650 | previously unloaded one. If that happens, we should make sure that | |
1651 | the shadow memory of the old breakpoints isn't used when reading or | |
1652 | writing memory. */ | |
1653 | ||
1654 | void | |
1655 | validate_breakpoints (void) | |
1656 | { | |
1657 | struct process_info *proc = current_process (); | |
1658 | struct breakpoint *bp; | |
1659 | ||
1660 | for (bp = proc->breakpoints; bp != NULL; bp = bp->next) | |
1661 | { | |
802e8e6d PA |
1662 | struct raw_breakpoint *raw = bp->raw; |
1663 | ||
1664 | if (raw->raw_type == raw_bkpt_type_sw && raw->inserted > 0) | |
1665 | validate_inserted_breakpoint (raw); | |
d3bbe7a0 PA |
1666 | } |
1667 | ||
1668 | delete_disabled_breakpoints (); | |
1669 | } | |
1670 | ||
611cb4a5 | 1671 | void |
f450004a | 1672 | check_mem_read (CORE_ADDR mem_addr, unsigned char *buf, int mem_len) |
611cb4a5 | 1673 | { |
95954743 | 1674 | struct process_info *proc = current_process (); |
8b07ae33 | 1675 | struct raw_breakpoint *bp = proc->raw_breakpoints; |
fa593d66 | 1676 | struct fast_tracepoint_jump *jp = proc->fast_tracepoint_jumps; |
611cb4a5 | 1677 | CORE_ADDR mem_end = mem_addr + mem_len; |
d3bbe7a0 | 1678 | int disabled_one = 0; |
611cb4a5 | 1679 | |
fa593d66 PA |
1680 | for (; jp != NULL; jp = jp->next) |
1681 | { | |
1682 | CORE_ADDR bp_end = jp->pc + jp->length; | |
1683 | CORE_ADDR start, end; | |
1684 | int copy_offset, copy_len, buf_offset; | |
1685 | ||
6bf36717 JK |
1686 | gdb_assert (fast_tracepoint_jump_shadow (jp) >= buf + mem_len |
1687 | || buf >= fast_tracepoint_jump_shadow (jp) + (jp)->length); | |
1688 | ||
fa593d66 PA |
1689 | if (mem_addr >= bp_end) |
1690 | continue; | |
1691 | if (jp->pc >= mem_end) | |
1692 | continue; | |
1693 | ||
1694 | start = jp->pc; | |
1695 | if (mem_addr > start) | |
1696 | start = mem_addr; | |
1697 | ||
1698 | end = bp_end; | |
1699 | if (end > mem_end) | |
1700 | end = mem_end; | |
1701 | ||
1702 | copy_len = end - start; | |
1703 | copy_offset = start - jp->pc; | |
1704 | buf_offset = start - mem_addr; | |
1705 | ||
1706 | if (jp->inserted) | |
1707 | memcpy (buf + buf_offset, | |
1708 | fast_tracepoint_jump_shadow (jp) + copy_offset, | |
1709 | copy_len); | |
1710 | } | |
1711 | ||
611cb4a5 DJ |
1712 | for (; bp != NULL; bp = bp->next) |
1713 | { | |
1714 | CORE_ADDR bp_end = bp->pc + breakpoint_len; | |
1715 | CORE_ADDR start, end; | |
1716 | int copy_offset, copy_len, buf_offset; | |
1717 | ||
802e8e6d PA |
1718 | if (bp->raw_type != raw_bkpt_type_sw) |
1719 | continue; | |
1720 | ||
6bf36717 JK |
1721 | gdb_assert (bp->old_data >= buf + mem_len |
1722 | || buf >= &bp->old_data[sizeof (bp->old_data)]); | |
1723 | ||
611cb4a5 DJ |
1724 | if (mem_addr >= bp_end) |
1725 | continue; | |
1726 | if (bp->pc >= mem_end) | |
1727 | continue; | |
1728 | ||
1729 | start = bp->pc; | |
1730 | if (mem_addr > start) | |
1731 | start = mem_addr; | |
1732 | ||
1733 | end = bp_end; | |
1734 | if (end > mem_end) | |
1735 | end = mem_end; | |
1736 | ||
1737 | copy_len = end - start; | |
1738 | copy_offset = start - bp->pc; | |
1739 | buf_offset = start - mem_addr; | |
1740 | ||
802e8e6d | 1741 | if (bp->inserted > 0) |
d3bbe7a0 PA |
1742 | { |
1743 | if (validate_inserted_breakpoint (bp)) | |
1744 | memcpy (buf + buf_offset, bp->old_data + copy_offset, copy_len); | |
1745 | else | |
1746 | disabled_one = 1; | |
1747 | } | |
611cb4a5 | 1748 | } |
d3bbe7a0 PA |
1749 | |
1750 | if (disabled_one) | |
1751 | delete_disabled_breakpoints (); | |
611cb4a5 DJ |
1752 | } |
1753 | ||
1754 | void | |
b9fd1791 PA |
1755 | check_mem_write (CORE_ADDR mem_addr, unsigned char *buf, |
1756 | const unsigned char *myaddr, int mem_len) | |
611cb4a5 | 1757 | { |
95954743 | 1758 | struct process_info *proc = current_process (); |
8b07ae33 | 1759 | struct raw_breakpoint *bp = proc->raw_breakpoints; |
fa593d66 | 1760 | struct fast_tracepoint_jump *jp = proc->fast_tracepoint_jumps; |
611cb4a5 | 1761 | CORE_ADDR mem_end = mem_addr + mem_len; |
d3bbe7a0 | 1762 | int disabled_one = 0; |
611cb4a5 | 1763 | |
fa593d66 PA |
1764 | /* First fast tracepoint jumps, then breakpoint traps on top. */ |
1765 | ||
1766 | for (; jp != NULL; jp = jp->next) | |
1767 | { | |
1768 | CORE_ADDR jp_end = jp->pc + jp->length; | |
1769 | CORE_ADDR start, end; | |
1770 | int copy_offset, copy_len, buf_offset; | |
1771 | ||
6bf36717 JK |
1772 | gdb_assert (fast_tracepoint_jump_shadow (jp) >= myaddr + mem_len |
1773 | || myaddr >= fast_tracepoint_jump_shadow (jp) + (jp)->length); | |
1774 | gdb_assert (fast_tracepoint_jump_insn (jp) >= buf + mem_len | |
1775 | || buf >= fast_tracepoint_jump_insn (jp) + (jp)->length); | |
1776 | ||
fa593d66 PA |
1777 | if (mem_addr >= jp_end) |
1778 | continue; | |
1779 | if (jp->pc >= mem_end) | |
1780 | continue; | |
1781 | ||
1782 | start = jp->pc; | |
1783 | if (mem_addr > start) | |
1784 | start = mem_addr; | |
1785 | ||
1786 | end = jp_end; | |
1787 | if (end > mem_end) | |
1788 | end = mem_end; | |
1789 | ||
1790 | copy_len = end - start; | |
1791 | copy_offset = start - jp->pc; | |
1792 | buf_offset = start - mem_addr; | |
1793 | ||
1794 | memcpy (fast_tracepoint_jump_shadow (jp) + copy_offset, | |
b9fd1791 | 1795 | myaddr + buf_offset, copy_len); |
fa593d66 PA |
1796 | if (jp->inserted) |
1797 | memcpy (buf + buf_offset, | |
1798 | fast_tracepoint_jump_insn (jp) + copy_offset, copy_len); | |
1799 | } | |
1800 | ||
611cb4a5 DJ |
1801 | for (; bp != NULL; bp = bp->next) |
1802 | { | |
1803 | CORE_ADDR bp_end = bp->pc + breakpoint_len; | |
1804 | CORE_ADDR start, end; | |
1805 | int copy_offset, copy_len, buf_offset; | |
1806 | ||
802e8e6d PA |
1807 | if (bp->raw_type != raw_bkpt_type_sw) |
1808 | continue; | |
1809 | ||
6bf36717 JK |
1810 | gdb_assert (bp->old_data >= myaddr + mem_len |
1811 | || myaddr >= &bp->old_data[sizeof (bp->old_data)]); | |
1812 | ||
611cb4a5 DJ |
1813 | if (mem_addr >= bp_end) |
1814 | continue; | |
1815 | if (bp->pc >= mem_end) | |
1816 | continue; | |
1817 | ||
1818 | start = bp->pc; | |
1819 | if (mem_addr > start) | |
1820 | start = mem_addr; | |
1821 | ||
1822 | end = bp_end; | |
1823 | if (end > mem_end) | |
1824 | end = mem_end; | |
1825 | ||
1826 | copy_len = end - start; | |
1827 | copy_offset = start - bp->pc; | |
1828 | buf_offset = start - mem_addr; | |
1829 | ||
b9fd1791 | 1830 | memcpy (bp->old_data + copy_offset, myaddr + buf_offset, copy_len); |
802e8e6d | 1831 | if (bp->inserted > 0) |
d3bbe7a0 PA |
1832 | { |
1833 | if (validate_inserted_breakpoint (bp)) | |
1834 | memcpy (buf + buf_offset, breakpoint_data + copy_offset, copy_len); | |
1835 | else | |
1836 | disabled_one = 1; | |
1837 | } | |
611cb4a5 | 1838 | } |
d3bbe7a0 PA |
1839 | |
1840 | if (disabled_one) | |
1841 | delete_disabled_breakpoints (); | |
611cb4a5 | 1842 | } |
ae13219e | 1843 | |
95954743 | 1844 | /* Delete all breakpoints, and un-insert them from the inferior. */ |
ae13219e DJ |
1845 | |
1846 | void | |
1847 | delete_all_breakpoints (void) | |
1848 | { | |
95954743 PA |
1849 | struct process_info *proc = current_process (); |
1850 | ||
1851 | while (proc->breakpoints) | |
8b07ae33 | 1852 | delete_breakpoint_1 (proc, proc->breakpoints); |
95954743 PA |
1853 | } |
1854 | ||
f9e39928 | 1855 | /* Clear the "inserted" flag in all breakpoints. */ |
95954743 PA |
1856 | |
1857 | void | |
f9e39928 | 1858 | mark_breakpoints_out (struct process_info *proc) |
95954743 | 1859 | { |
8b07ae33 | 1860 | struct raw_breakpoint *raw_bp; |
95954743 | 1861 | |
8b07ae33 PA |
1862 | for (raw_bp = proc->raw_breakpoints; raw_bp != NULL; raw_bp = raw_bp->next) |
1863 | raw_bp->inserted = 0; | |
f9e39928 PA |
1864 | } |
1865 | ||
1866 | /* Release all breakpoints, but do not try to un-insert them from the | |
1867 | inferior. */ | |
1868 | ||
1869 | void | |
1870 | free_all_breakpoints (struct process_info *proc) | |
1871 | { | |
1872 | mark_breakpoints_out (proc); | |
8b07ae33 PA |
1873 | |
1874 | /* Note: use PROC explicitly instead of deferring to | |
1875 | delete_all_breakpoints --- CURRENT_INFERIOR may already have been | |
1876 | released when we get here. There should be no call to | |
1877 | current_process from here on. */ | |
95954743 | 1878 | while (proc->breakpoints) |
8b07ae33 | 1879 | delete_breakpoint_1 (proc, proc->breakpoints); |
ae13219e | 1880 | } |