Commit | Line | Data |
---|---|---|
c906108c | 1 | /* Select target systems and architectures at runtime for GDB. |
7998dfc3 | 2 | |
618f726f | 3 | Copyright (C) 1990-2016 Free Software Foundation, Inc. |
7998dfc3 | 4 | |
c906108c SS |
5 | Contributed by Cygnus Support. |
6 | ||
c5aa993b | 7 | This file is part of GDB. |
c906108c | 8 | |
c5aa993b JM |
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 |
c5aa993b | 12 | (at your option) any later version. |
c906108c | 13 | |
c5aa993b JM |
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. | |
c906108c | 18 | |
c5aa993b | 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/>. */ |
c906108c SS |
21 | |
22 | #include "defs.h" | |
c906108c | 23 | #include "target.h" |
68c765e2 | 24 | #include "target-dcache.h" |
c906108c SS |
25 | #include "gdbcmd.h" |
26 | #include "symtab.h" | |
27 | #include "inferior.h" | |
45741a9c | 28 | #include "infrun.h" |
c906108c SS |
29 | #include "bfd.h" |
30 | #include "symfile.h" | |
31 | #include "objfiles.h" | |
4930751a | 32 | #include "dcache.h" |
c906108c | 33 | #include <signal.h> |
4e052eda | 34 | #include "regcache.h" |
b6591e8b | 35 | #include "gdbcore.h" |
424163ea | 36 | #include "target-descriptions.h" |
e1ac3328 | 37 | #include "gdbthread.h" |
b9db4ced | 38 | #include "solib.h" |
07b82ea5 | 39 | #include "exec.h" |
edb3359d | 40 | #include "inline-frame.h" |
2f4d8875 | 41 | #include "tracepoint.h" |
7313baad | 42 | #include "gdb/fileio.h" |
8ffcbaaf | 43 | #include "agent.h" |
8de71aab | 44 | #include "auxv.h" |
a7068b60 | 45 | #include "target-debug.h" |
41fd2b0f PA |
46 | #include "top.h" |
47 | #include "event-top.h" | |
c906108c | 48 | |
a14ed312 | 49 | static void target_info (char *, int); |
c906108c | 50 | |
f0f9ff95 TT |
51 | static void generic_tls_error (void) ATTRIBUTE_NORETURN; |
52 | ||
0a4f40a2 | 53 | static void default_terminal_info (struct target_ops *, const char *, int); |
c906108c | 54 | |
5009afc5 AS |
55 | static int default_watchpoint_addr_within_range (struct target_ops *, |
56 | CORE_ADDR, CORE_ADDR, int); | |
57 | ||
31568a15 TT |
58 | static int default_region_ok_for_hw_watchpoint (struct target_ops *, |
59 | CORE_ADDR, int); | |
e0d24f8d | 60 | |
a30bf1f1 | 61 | static void default_rcmd (struct target_ops *, const char *, struct ui_file *); |
a53f3625 | 62 | |
4229b31d TT |
63 | static ptid_t default_get_ada_task_ptid (struct target_ops *self, |
64 | long lwp, long tid); | |
65 | ||
098dba18 TT |
66 | static int default_follow_fork (struct target_ops *self, int follow_child, |
67 | int detach_fork); | |
68 | ||
8d657035 TT |
69 | static void default_mourn_inferior (struct target_ops *self); |
70 | ||
58a5184e TT |
71 | static int default_search_memory (struct target_ops *ops, |
72 | CORE_ADDR start_addr, | |
73 | ULONGEST search_space_len, | |
74 | const gdb_byte *pattern, | |
75 | ULONGEST pattern_len, | |
76 | CORE_ADDR *found_addrp); | |
77 | ||
936d2992 PA |
78 | static int default_verify_memory (struct target_ops *self, |
79 | const gdb_byte *data, | |
80 | CORE_ADDR memaddr, ULONGEST size); | |
81 | ||
8eaff7cd TT |
82 | static struct address_space *default_thread_address_space |
83 | (struct target_ops *self, ptid_t ptid); | |
84 | ||
c25c4a8b | 85 | static void tcomplain (void) ATTRIBUTE_NORETURN; |
c906108c | 86 | |
555bbdeb TT |
87 | static int return_zero (struct target_ops *); |
88 | ||
89 | static int return_zero_has_execution (struct target_ops *, ptid_t); | |
c906108c | 90 | |
a14ed312 | 91 | static void target_command (char *, int); |
c906108c | 92 | |
a14ed312 | 93 | static struct target_ops *find_default_run_target (char *); |
c906108c | 94 | |
c2250ad1 UW |
95 | static struct gdbarch *default_thread_architecture (struct target_ops *ops, |
96 | ptid_t ptid); | |
97 | ||
0b5a2719 TT |
98 | static int dummy_find_memory_regions (struct target_ops *self, |
99 | find_memory_region_ftype ignore1, | |
100 | void *ignore2); | |
101 | ||
16f796b1 TT |
102 | static char *dummy_make_corefile_notes (struct target_ops *self, |
103 | bfd *ignore1, int *ignore2); | |
104 | ||
770234d3 TT |
105 | static char *default_pid_to_str (struct target_ops *ops, ptid_t ptid); |
106 | ||
fe31bf5b TT |
107 | static enum exec_direction_kind default_execution_direction |
108 | (struct target_ops *self); | |
109 | ||
a7068b60 TT |
110 | static struct target_ops debug_target; |
111 | ||
1101cb7b TT |
112 | #include "target-delegates.c" |
113 | ||
a14ed312 | 114 | static void init_dummy_target (void); |
c906108c | 115 | |
3cecbbbe TT |
116 | static void update_current_target (void); |
117 | ||
89a1c21a SM |
118 | /* Vector of existing target structures. */ |
119 | typedef struct target_ops *target_ops_p; | |
120 | DEF_VEC_P (target_ops_p); | |
121 | static VEC (target_ops_p) *target_structs; | |
c906108c SS |
122 | |
123 | /* The initial current target, so that there is always a semi-valid | |
124 | current target. */ | |
125 | ||
126 | static struct target_ops dummy_target; | |
127 | ||
128 | /* Top of target stack. */ | |
129 | ||
258b763a | 130 | static struct target_ops *target_stack; |
c906108c SS |
131 | |
132 | /* The target structure we are currently using to talk to a process | |
133 | or file or whatever "inferior" we have. */ | |
134 | ||
135 | struct target_ops current_target; | |
136 | ||
137 | /* Command list for target. */ | |
138 | ||
139 | static struct cmd_list_element *targetlist = NULL; | |
140 | ||
cf7a04e8 DJ |
141 | /* Nonzero if we should trust readonly sections from the |
142 | executable when reading memory. */ | |
143 | ||
144 | static int trust_readonly = 0; | |
145 | ||
8defab1a DJ |
146 | /* Nonzero if we should show true memory content including |
147 | memory breakpoint inserted by gdb. */ | |
148 | ||
149 | static int show_memory_breakpoints = 0; | |
150 | ||
d914c394 SS |
151 | /* These globals control whether GDB attempts to perform these |
152 | operations; they are useful for targets that need to prevent | |
153 | inadvertant disruption, such as in non-stop mode. */ | |
154 | ||
155 | int may_write_registers = 1; | |
156 | ||
157 | int may_write_memory = 1; | |
158 | ||
159 | int may_insert_breakpoints = 1; | |
160 | ||
161 | int may_insert_tracepoints = 1; | |
162 | ||
163 | int may_insert_fast_tracepoints = 1; | |
164 | ||
165 | int may_stop = 1; | |
166 | ||
c906108c SS |
167 | /* Non-zero if we want to see trace of target level stuff. */ |
168 | ||
ccce17b0 | 169 | static unsigned int targetdebug = 0; |
3cecbbbe TT |
170 | |
171 | static void | |
172 | set_targetdebug (char *args, int from_tty, struct cmd_list_element *c) | |
173 | { | |
174 | update_current_target (); | |
175 | } | |
176 | ||
920d2a44 AC |
177 | static void |
178 | show_targetdebug (struct ui_file *file, int from_tty, | |
179 | struct cmd_list_element *c, const char *value) | |
180 | { | |
181 | fprintf_filtered (file, _("Target debugging is %s.\n"), value); | |
182 | } | |
c906108c | 183 | |
a14ed312 | 184 | static void setup_target_debug (void); |
c906108c | 185 | |
c906108c SS |
186 | /* The user just typed 'target' without the name of a target. */ |
187 | ||
c906108c | 188 | static void |
fba45db2 | 189 | target_command (char *arg, int from_tty) |
c906108c SS |
190 | { |
191 | fputs_filtered ("Argument required (target name). Try `help target'\n", | |
192 | gdb_stdout); | |
193 | } | |
194 | ||
c35b1492 PA |
195 | /* Default target_has_* methods for process_stratum targets. */ |
196 | ||
197 | int | |
198 | default_child_has_all_memory (struct target_ops *ops) | |
199 | { | |
200 | /* If no inferior selected, then we can't read memory here. */ | |
201 | if (ptid_equal (inferior_ptid, null_ptid)) | |
202 | return 0; | |
203 | ||
204 | return 1; | |
205 | } | |
206 | ||
207 | int | |
208 | default_child_has_memory (struct target_ops *ops) | |
209 | { | |
210 | /* If no inferior selected, then we can't read memory here. */ | |
211 | if (ptid_equal (inferior_ptid, null_ptid)) | |
212 | return 0; | |
213 | ||
214 | return 1; | |
215 | } | |
216 | ||
217 | int | |
218 | default_child_has_stack (struct target_ops *ops) | |
219 | { | |
220 | /* If no inferior selected, there's no stack. */ | |
221 | if (ptid_equal (inferior_ptid, null_ptid)) | |
222 | return 0; | |
223 | ||
224 | return 1; | |
225 | } | |
226 | ||
227 | int | |
228 | default_child_has_registers (struct target_ops *ops) | |
229 | { | |
230 | /* Can't read registers from no inferior. */ | |
231 | if (ptid_equal (inferior_ptid, null_ptid)) | |
232 | return 0; | |
233 | ||
234 | return 1; | |
235 | } | |
236 | ||
237 | int | |
aeaec162 | 238 | default_child_has_execution (struct target_ops *ops, ptid_t the_ptid) |
c35b1492 PA |
239 | { |
240 | /* If there's no thread selected, then we can't make it run through | |
241 | hoops. */ | |
aeaec162 | 242 | if (ptid_equal (the_ptid, null_ptid)) |
c35b1492 PA |
243 | return 0; |
244 | ||
245 | return 1; | |
246 | } | |
247 | ||
248 | ||
249 | int | |
250 | target_has_all_memory_1 (void) | |
251 | { | |
252 | struct target_ops *t; | |
253 | ||
254 | for (t = current_target.beneath; t != NULL; t = t->beneath) | |
255 | if (t->to_has_all_memory (t)) | |
256 | return 1; | |
257 | ||
258 | return 0; | |
259 | } | |
260 | ||
261 | int | |
262 | target_has_memory_1 (void) | |
263 | { | |
264 | struct target_ops *t; | |
265 | ||
266 | for (t = current_target.beneath; t != NULL; t = t->beneath) | |
267 | if (t->to_has_memory (t)) | |
268 | return 1; | |
269 | ||
270 | return 0; | |
271 | } | |
272 | ||
273 | int | |
274 | target_has_stack_1 (void) | |
275 | { | |
276 | struct target_ops *t; | |
277 | ||
278 | for (t = current_target.beneath; t != NULL; t = t->beneath) | |
279 | if (t->to_has_stack (t)) | |
280 | return 1; | |
281 | ||
282 | return 0; | |
283 | } | |
284 | ||
285 | int | |
286 | target_has_registers_1 (void) | |
287 | { | |
288 | struct target_ops *t; | |
289 | ||
290 | for (t = current_target.beneath; t != NULL; t = t->beneath) | |
291 | if (t->to_has_registers (t)) | |
292 | return 1; | |
293 | ||
294 | return 0; | |
295 | } | |
296 | ||
297 | int | |
aeaec162 | 298 | target_has_execution_1 (ptid_t the_ptid) |
c35b1492 PA |
299 | { |
300 | struct target_ops *t; | |
301 | ||
302 | for (t = current_target.beneath; t != NULL; t = t->beneath) | |
aeaec162 | 303 | if (t->to_has_execution (t, the_ptid)) |
c35b1492 PA |
304 | return 1; |
305 | ||
306 | return 0; | |
307 | } | |
308 | ||
aeaec162 TT |
309 | int |
310 | target_has_execution_current (void) | |
311 | { | |
312 | return target_has_execution_1 (inferior_ptid); | |
313 | } | |
314 | ||
c22a2b88 TT |
315 | /* Complete initialization of T. This ensures that various fields in |
316 | T are set, if needed by the target implementation. */ | |
c906108c SS |
317 | |
318 | void | |
c22a2b88 | 319 | complete_target_initialization (struct target_ops *t) |
c906108c | 320 | { |
0088c768 | 321 | /* Provide default values for all "must have" methods. */ |
0088c768 | 322 | |
c35b1492 | 323 | if (t->to_has_all_memory == NULL) |
555bbdeb | 324 | t->to_has_all_memory = return_zero; |
c35b1492 PA |
325 | |
326 | if (t->to_has_memory == NULL) | |
555bbdeb | 327 | t->to_has_memory = return_zero; |
c35b1492 PA |
328 | |
329 | if (t->to_has_stack == NULL) | |
555bbdeb | 330 | t->to_has_stack = return_zero; |
c35b1492 PA |
331 | |
332 | if (t->to_has_registers == NULL) | |
555bbdeb | 333 | t->to_has_registers = return_zero; |
c35b1492 PA |
334 | |
335 | if (t->to_has_execution == NULL) | |
555bbdeb | 336 | t->to_has_execution = return_zero_has_execution; |
1101cb7b | 337 | |
b3ccfe11 TT |
338 | /* These methods can be called on an unpushed target and so require |
339 | a default implementation if the target might plausibly be the | |
340 | default run target. */ | |
341 | gdb_assert (t->to_can_run == NULL || (t->to_can_async_p != NULL | |
342 | && t->to_supports_non_stop != NULL)); | |
343 | ||
1101cb7b | 344 | install_delegators (t); |
c22a2b88 TT |
345 | } |
346 | ||
8981c758 TT |
347 | /* This is used to implement the various target commands. */ |
348 | ||
349 | static void | |
350 | open_target (char *args, int from_tty, struct cmd_list_element *command) | |
351 | { | |
19ba03f4 | 352 | struct target_ops *ops = (struct target_ops *) get_cmd_context (command); |
8981c758 TT |
353 | |
354 | if (targetdebug) | |
355 | fprintf_unfiltered (gdb_stdlog, "-> %s->to_open (...)\n", | |
356 | ops->to_shortname); | |
357 | ||
358 | ops->to_open (args, from_tty); | |
359 | ||
360 | if (targetdebug) | |
361 | fprintf_unfiltered (gdb_stdlog, "<- %s->to_open (%s, %d)\n", | |
362 | ops->to_shortname, args, from_tty); | |
363 | } | |
364 | ||
c22a2b88 TT |
365 | /* Add possible target architecture T to the list and add a new |
366 | command 'target T->to_shortname'. Set COMPLETER as the command's | |
367 | completer if not NULL. */ | |
368 | ||
369 | void | |
370 | add_target_with_completer (struct target_ops *t, | |
371 | completer_ftype *completer) | |
372 | { | |
373 | struct cmd_list_element *c; | |
374 | ||
375 | complete_target_initialization (t); | |
c35b1492 | 376 | |
89a1c21a | 377 | VEC_safe_push (target_ops_p, target_structs, t); |
c906108c SS |
378 | |
379 | if (targetlist == NULL) | |
1bedd215 AC |
380 | add_prefix_cmd ("target", class_run, target_command, _("\ |
381 | Connect to a target machine or process.\n\ | |
c906108c SS |
382 | The first argument is the type or protocol of the target machine.\n\ |
383 | Remaining arguments are interpreted by the target protocol. For more\n\ | |
384 | information on the arguments for a particular protocol, type\n\ | |
1bedd215 | 385 | `help target ' followed by the protocol name."), |
c906108c | 386 | &targetlist, "target ", 0, &cmdlist); |
8981c758 TT |
387 | c = add_cmd (t->to_shortname, no_class, NULL, t->to_doc, &targetlist); |
388 | set_cmd_sfunc (c, open_target); | |
389 | set_cmd_context (c, t); | |
9852c492 YQ |
390 | if (completer != NULL) |
391 | set_cmd_completer (c, completer); | |
392 | } | |
393 | ||
394 | /* Add a possible target architecture to the list. */ | |
395 | ||
396 | void | |
397 | add_target (struct target_ops *t) | |
398 | { | |
399 | add_target_with_completer (t, NULL); | |
c906108c SS |
400 | } |
401 | ||
b48d48eb MM |
402 | /* See target.h. */ |
403 | ||
404 | void | |
405 | add_deprecated_target_alias (struct target_ops *t, char *alias) | |
406 | { | |
407 | struct cmd_list_element *c; | |
408 | char *alt; | |
409 | ||
410 | /* If we use add_alias_cmd, here, we do not get the deprecated warning, | |
411 | see PR cli/15104. */ | |
8981c758 TT |
412 | c = add_cmd (alias, no_class, NULL, t->to_doc, &targetlist); |
413 | set_cmd_sfunc (c, open_target); | |
414 | set_cmd_context (c, t); | |
b48d48eb MM |
415 | alt = xstrprintf ("target %s", t->to_shortname); |
416 | deprecate_cmd (c, alt); | |
417 | } | |
418 | ||
c906108c SS |
419 | /* Stub functions */ |
420 | ||
7d85a9c0 JB |
421 | void |
422 | target_kill (void) | |
423 | { | |
423a4807 | 424 | current_target.to_kill (¤t_target); |
7d85a9c0 JB |
425 | } |
426 | ||
11cf8741 | 427 | void |
9cbe5fff | 428 | target_load (const char *arg, int from_tty) |
11cf8741 | 429 | { |
4e5d721f | 430 | target_dcache_invalidate (); |
71a9f134 | 431 | (*current_target.to_load) (¤t_target, arg, from_tty); |
11cf8741 JM |
432 | } |
433 | ||
5842f62a PA |
434 | /* Possible terminal states. */ |
435 | ||
436 | enum terminal_state | |
437 | { | |
438 | /* The inferior's terminal settings are in effect. */ | |
439 | terminal_is_inferior = 0, | |
440 | ||
441 | /* Some of our terminal settings are in effect, enough to get | |
442 | proper output. */ | |
443 | terminal_is_ours_for_output = 1, | |
444 | ||
445 | /* Our terminal settings are in effect, for output and input. */ | |
446 | terminal_is_ours = 2 | |
447 | }; | |
448 | ||
7afa63c6 | 449 | static enum terminal_state terminal_state = terminal_is_ours; |
5842f62a PA |
450 | |
451 | /* See target.h. */ | |
452 | ||
453 | void | |
454 | target_terminal_init (void) | |
455 | { | |
456 | (*current_target.to_terminal_init) (¤t_target); | |
457 | ||
458 | terminal_state = terminal_is_ours; | |
459 | } | |
460 | ||
461 | /* See target.h. */ | |
462 | ||
6fdebc3d PA |
463 | int |
464 | target_terminal_is_inferior (void) | |
465 | { | |
466 | return (terminal_state == terminal_is_inferior); | |
467 | } | |
468 | ||
469 | /* See target.h. */ | |
470 | ||
2f99e8fc YQ |
471 | int |
472 | target_terminal_is_ours (void) | |
473 | { | |
474 | return (terminal_state == terminal_is_ours); | |
475 | } | |
476 | ||
477 | /* See target.h. */ | |
478 | ||
d9d2d8b6 PA |
479 | void |
480 | target_terminal_inferior (void) | |
481 | { | |
41fd2b0f PA |
482 | struct ui *ui = current_ui; |
483 | ||
d9d2d8b6 | 484 | /* A background resume (``run&'') should leave GDB in control of the |
3b12939d PA |
485 | terminal. */ |
486 | if (ui->prompt_state != PROMPT_BLOCKED) | |
d9d2d8b6 PA |
487 | return; |
488 | ||
41fd2b0f PA |
489 | /* Always delete the current UI's input file handler, regardless of |
490 | terminal_state, because terminal_state is only valid for the main | |
491 | UI. */ | |
492 | delete_file_handler (ui->input_fd); | |
493 | ||
215d3118 PA |
494 | /* Since we always run the inferior in the main console (unless "set |
495 | inferior-tty" is in effect), when some UI other than the main one | |
496 | calls target_terminal_inferior/target_terminal_inferior, then we | |
497 | only register/unregister the UI's input from the event loop, but | |
498 | leave the main UI's terminal settings as is. */ | |
499 | if (ui != main_ui) | |
500 | return; | |
501 | ||
5842f62a PA |
502 | if (terminal_state == terminal_is_inferior) |
503 | return; | |
504 | ||
d9d2d8b6 PA |
505 | /* If GDB is resuming the inferior in the foreground, install |
506 | inferior's terminal modes. */ | |
d2f640d4 | 507 | (*current_target.to_terminal_inferior) (¤t_target); |
5842f62a | 508 | terminal_state = terminal_is_inferior; |
93692b58 PA |
509 | |
510 | /* If the user hit C-c before, pretend that it was hit right | |
511 | here. */ | |
512 | if (check_quit_flag ()) | |
513 | target_pass_ctrlc (); | |
5842f62a PA |
514 | } |
515 | ||
516 | /* See target.h. */ | |
517 | ||
518 | void | |
519 | target_terminal_ours (void) | |
520 | { | |
41fd2b0f PA |
521 | struct ui *ui = current_ui; |
522 | ||
523 | /* Always add the current UI's input file handler, regardless of | |
524 | terminal_state, because terminal_state is only valid for the main | |
525 | UI. */ | |
526 | add_file_handler (ui->input_fd, stdin_event_handler, ui); | |
527 | ||
215d3118 PA |
528 | /* See target_terminal_inferior. */ |
529 | if (ui != main_ui) | |
530 | return; | |
531 | ||
5842f62a PA |
532 | if (terminal_state == terminal_is_ours) |
533 | return; | |
534 | ||
535 | (*current_target.to_terminal_ours) (¤t_target); | |
536 | terminal_state = terminal_is_ours; | |
537 | } | |
538 | ||
539 | /* See target.h. */ | |
540 | ||
541 | void | |
542 | target_terminal_ours_for_output (void) | |
543 | { | |
215d3118 PA |
544 | struct ui *ui = current_ui; |
545 | ||
546 | /* See target_terminal_inferior. */ | |
547 | if (ui != main_ui) | |
548 | return; | |
549 | ||
5842f62a PA |
550 | if (terminal_state != terminal_is_inferior) |
551 | return; | |
552 | (*current_target.to_terminal_ours_for_output) (¤t_target); | |
553 | terminal_state = terminal_is_ours_for_output; | |
d9d2d8b6 | 554 | } |
136d6dae | 555 | |
b0ed115f TT |
556 | /* See target.h. */ |
557 | ||
558 | int | |
559 | target_supports_terminal_ours (void) | |
560 | { | |
561 | struct target_ops *t; | |
562 | ||
563 | for (t = current_target.beneath; t != NULL; t = t->beneath) | |
564 | { | |
565 | if (t->to_terminal_ours != delegate_terminal_ours | |
566 | && t->to_terminal_ours != tdefault_terminal_ours) | |
567 | return 1; | |
568 | } | |
569 | ||
570 | return 0; | |
571 | } | |
572 | ||
1abf3a14 SM |
573 | /* Restore the terminal to its previous state (helper for |
574 | make_cleanup_restore_target_terminal). */ | |
575 | ||
576 | static void | |
577 | cleanup_restore_target_terminal (void *arg) | |
578 | { | |
19ba03f4 | 579 | enum terminal_state *previous_state = (enum terminal_state *) arg; |
1abf3a14 SM |
580 | |
581 | switch (*previous_state) | |
582 | { | |
583 | case terminal_is_ours: | |
584 | target_terminal_ours (); | |
585 | break; | |
586 | case terminal_is_ours_for_output: | |
587 | target_terminal_ours_for_output (); | |
588 | break; | |
589 | case terminal_is_inferior: | |
590 | target_terminal_inferior (); | |
591 | break; | |
592 | } | |
593 | } | |
594 | ||
595 | /* See target.h. */ | |
596 | ||
597 | struct cleanup * | |
598 | make_cleanup_restore_target_terminal (void) | |
599 | { | |
8d749320 | 600 | enum terminal_state *ts = XNEW (enum terminal_state); |
1abf3a14 SM |
601 | |
602 | *ts = terminal_state; | |
603 | ||
604 | return make_cleanup_dtor (cleanup_restore_target_terminal, ts, xfree); | |
605 | } | |
606 | ||
c906108c | 607 | static void |
fba45db2 | 608 | tcomplain (void) |
c906108c | 609 | { |
8a3fe4f8 | 610 | error (_("You can't do that when your target is `%s'"), |
c906108c SS |
611 | current_target.to_shortname); |
612 | } | |
613 | ||
614 | void | |
fba45db2 | 615 | noprocess (void) |
c906108c | 616 | { |
8a3fe4f8 | 617 | error (_("You can't do that without a process to debug.")); |
c906108c SS |
618 | } |
619 | ||
c906108c | 620 | static void |
0a4f40a2 | 621 | default_terminal_info (struct target_ops *self, const char *args, int from_tty) |
c906108c | 622 | { |
a3f17187 | 623 | printf_unfiltered (_("No saved terminal information.\n")); |
c906108c SS |
624 | } |
625 | ||
0ef643c8 JB |
626 | /* A default implementation for the to_get_ada_task_ptid target method. |
627 | ||
628 | This function builds the PTID by using both LWP and TID as part of | |
629 | the PTID lwp and tid elements. The pid used is the pid of the | |
630 | inferior_ptid. */ | |
631 | ||
2c0b251b | 632 | static ptid_t |
1e6b91a4 | 633 | default_get_ada_task_ptid (struct target_ops *self, long lwp, long tid) |
0ef643c8 JB |
634 | { |
635 | return ptid_build (ptid_get_pid (inferior_ptid), lwp, tid); | |
636 | } | |
637 | ||
32231432 | 638 | static enum exec_direction_kind |
4c612759 | 639 | default_execution_direction (struct target_ops *self) |
32231432 PA |
640 | { |
641 | if (!target_can_execute_reverse) | |
642 | return EXEC_FORWARD; | |
643 | else if (!target_can_async_p ()) | |
644 | return EXEC_FORWARD; | |
645 | else | |
646 | gdb_assert_not_reached ("\ | |
647 | to_execution_direction must be implemented for reverse async"); | |
648 | } | |
649 | ||
7998dfc3 AC |
650 | /* Go through the target stack from top to bottom, copying over zero |
651 | entries in current_target, then filling in still empty entries. In | |
652 | effect, we are doing class inheritance through the pushed target | |
653 | vectors. | |
654 | ||
655 | NOTE: cagney/2003-10-17: The problem with this inheritance, as it | |
656 | is currently implemented, is that it discards any knowledge of | |
657 | which target an inherited method originally belonged to. | |
658 | Consequently, new new target methods should instead explicitly and | |
659 | locally search the target stack for the target that can handle the | |
660 | request. */ | |
c906108c SS |
661 | |
662 | static void | |
7998dfc3 | 663 | update_current_target (void) |
c906108c | 664 | { |
7998dfc3 AC |
665 | struct target_ops *t; |
666 | ||
08d8bcd7 | 667 | /* First, reset current's contents. */ |
7998dfc3 AC |
668 | memset (¤t_target, 0, sizeof (current_target)); |
669 | ||
1101cb7b TT |
670 | /* Install the delegators. */ |
671 | install_delegators (¤t_target); | |
672 | ||
be4ddd36 TT |
673 | current_target.to_stratum = target_stack->to_stratum; |
674 | ||
7998dfc3 AC |
675 | #define INHERIT(FIELD, TARGET) \ |
676 | if (!current_target.FIELD) \ | |
677 | current_target.FIELD = (TARGET)->FIELD | |
678 | ||
be4ddd36 TT |
679 | /* Do not add any new INHERITs here. Instead, use the delegation |
680 | mechanism provided by make-target-delegates. */ | |
7998dfc3 AC |
681 | for (t = target_stack; t; t = t->beneath) |
682 | { | |
683 | INHERIT (to_shortname, t); | |
684 | INHERIT (to_longname, t); | |
dc177b7a | 685 | INHERIT (to_attach_no_wait, t); |
74174d2e | 686 | INHERIT (to_have_steppable_watchpoint, t); |
7998dfc3 | 687 | INHERIT (to_have_continuable_watchpoint, t); |
7998dfc3 | 688 | INHERIT (to_has_thread_control, t); |
7998dfc3 AC |
689 | } |
690 | #undef INHERIT | |
691 | ||
7998dfc3 AC |
692 | /* Finally, position the target-stack beneath the squashed |
693 | "current_target". That way code looking for a non-inherited | |
694 | target method can quickly and simply find it. */ | |
695 | current_target.beneath = target_stack; | |
b4b61fdb DJ |
696 | |
697 | if (targetdebug) | |
698 | setup_target_debug (); | |
c906108c SS |
699 | } |
700 | ||
701 | /* Push a new target type into the stack of the existing target accessors, | |
702 | possibly superseding some of the existing accessors. | |
703 | ||
c906108c SS |
704 | Rather than allow an empty stack, we always have the dummy target at |
705 | the bottom stratum, so we can call the function vectors without | |
706 | checking them. */ | |
707 | ||
b26a4dcb | 708 | void |
fba45db2 | 709 | push_target (struct target_ops *t) |
c906108c | 710 | { |
258b763a | 711 | struct target_ops **cur; |
c906108c SS |
712 | |
713 | /* Check magic number. If wrong, it probably means someone changed | |
714 | the struct definition, but not all the places that initialize one. */ | |
715 | if (t->to_magic != OPS_MAGIC) | |
716 | { | |
c5aa993b JM |
717 | fprintf_unfiltered (gdb_stderr, |
718 | "Magic number of %s target struct wrong\n", | |
719 | t->to_shortname); | |
3e43a32a MS |
720 | internal_error (__FILE__, __LINE__, |
721 | _("failed internal consistency check")); | |
c906108c SS |
722 | } |
723 | ||
258b763a AC |
724 | /* Find the proper stratum to install this target in. */ |
725 | for (cur = &target_stack; (*cur) != NULL; cur = &(*cur)->beneath) | |
c906108c | 726 | { |
258b763a | 727 | if ((int) (t->to_stratum) >= (int) (*cur)->to_stratum) |
c906108c SS |
728 | break; |
729 | } | |
730 | ||
258b763a | 731 | /* If there's already targets at this stratum, remove them. */ |
88c231eb | 732 | /* FIXME: cagney/2003-10-15: I think this should be popping all |
258b763a AC |
733 | targets to CUR, and not just those at this stratum level. */ |
734 | while ((*cur) != NULL && t->to_stratum == (*cur)->to_stratum) | |
735 | { | |
736 | /* There's already something at this stratum level. Close it, | |
737 | and un-hook it from the stack. */ | |
738 | struct target_ops *tmp = (*cur); | |
5d502164 | 739 | |
258b763a AC |
740 | (*cur) = (*cur)->beneath; |
741 | tmp->beneath = NULL; | |
460014f5 | 742 | target_close (tmp); |
258b763a | 743 | } |
c906108c SS |
744 | |
745 | /* We have removed all targets in our stratum, now add the new one. */ | |
258b763a AC |
746 | t->beneath = (*cur); |
747 | (*cur) = t; | |
c906108c SS |
748 | |
749 | update_current_target (); | |
c906108c SS |
750 | } |
751 | ||
2bc416ba | 752 | /* Remove a target_ops vector from the stack, wherever it may be. |
c906108c SS |
753 | Return how many times it was removed (0 or 1). */ |
754 | ||
755 | int | |
fba45db2 | 756 | unpush_target (struct target_ops *t) |
c906108c | 757 | { |
258b763a AC |
758 | struct target_ops **cur; |
759 | struct target_ops *tmp; | |
c906108c | 760 | |
c8d104ad PA |
761 | if (t->to_stratum == dummy_stratum) |
762 | internal_error (__FILE__, __LINE__, | |
9b20d036 | 763 | _("Attempt to unpush the dummy target")); |
c8d104ad | 764 | |
c906108c | 765 | /* Look for the specified target. Note that we assume that a target |
c378eb4e | 766 | can only occur once in the target stack. */ |
c906108c | 767 | |
258b763a AC |
768 | for (cur = &target_stack; (*cur) != NULL; cur = &(*cur)->beneath) |
769 | { | |
770 | if ((*cur) == t) | |
771 | break; | |
772 | } | |
c906108c | 773 | |
305436e0 PA |
774 | /* If we don't find target_ops, quit. Only open targets should be |
775 | closed. */ | |
258b763a | 776 | if ((*cur) == NULL) |
305436e0 | 777 | return 0; |
5269965e | 778 | |
c378eb4e | 779 | /* Unchain the target. */ |
258b763a AC |
780 | tmp = (*cur); |
781 | (*cur) = (*cur)->beneath; | |
782 | tmp->beneath = NULL; | |
c906108c SS |
783 | |
784 | update_current_target (); | |
c906108c | 785 | |
305436e0 PA |
786 | /* Finally close the target. Note we do this after unchaining, so |
787 | any target method calls from within the target_close | |
788 | implementation don't end up in T anymore. */ | |
460014f5 | 789 | target_close (t); |
305436e0 | 790 | |
c906108c SS |
791 | return 1; |
792 | } | |
793 | ||
915ef8b1 PA |
794 | /* Unpush TARGET and assert that it worked. */ |
795 | ||
796 | static void | |
797 | unpush_target_and_assert (struct target_ops *target) | |
798 | { | |
799 | if (!unpush_target (target)) | |
800 | { | |
801 | fprintf_unfiltered (gdb_stderr, | |
802 | "pop_all_targets couldn't find target %s\n", | |
803 | target->to_shortname); | |
804 | internal_error (__FILE__, __LINE__, | |
805 | _("failed internal consistency check")); | |
806 | } | |
807 | } | |
808 | ||
aa76d38d | 809 | void |
460014f5 | 810 | pop_all_targets_above (enum strata above_stratum) |
aa76d38d | 811 | { |
87ab71f0 | 812 | while ((int) (current_target.to_stratum) > (int) above_stratum) |
915ef8b1 PA |
813 | unpush_target_and_assert (target_stack); |
814 | } | |
815 | ||
816 | /* See target.h. */ | |
817 | ||
818 | void | |
819 | pop_all_targets_at_and_above (enum strata stratum) | |
820 | { | |
821 | while ((int) (current_target.to_stratum) >= (int) stratum) | |
822 | unpush_target_and_assert (target_stack); | |
aa76d38d PA |
823 | } |
824 | ||
87ab71f0 | 825 | void |
460014f5 | 826 | pop_all_targets (void) |
87ab71f0 | 827 | { |
460014f5 | 828 | pop_all_targets_above (dummy_stratum); |
87ab71f0 PA |
829 | } |
830 | ||
c0edd9ed JK |
831 | /* Return 1 if T is now pushed in the target stack. Return 0 otherwise. */ |
832 | ||
833 | int | |
834 | target_is_pushed (struct target_ops *t) | |
835 | { | |
84202f9c | 836 | struct target_ops *cur; |
c0edd9ed JK |
837 | |
838 | /* Check magic number. If wrong, it probably means someone changed | |
839 | the struct definition, but not all the places that initialize one. */ | |
840 | if (t->to_magic != OPS_MAGIC) | |
841 | { | |
842 | fprintf_unfiltered (gdb_stderr, | |
843 | "Magic number of %s target struct wrong\n", | |
844 | t->to_shortname); | |
3e43a32a MS |
845 | internal_error (__FILE__, __LINE__, |
846 | _("failed internal consistency check")); | |
c0edd9ed JK |
847 | } |
848 | ||
84202f9c TT |
849 | for (cur = target_stack; cur != NULL; cur = cur->beneath) |
850 | if (cur == t) | |
c0edd9ed JK |
851 | return 1; |
852 | ||
853 | return 0; | |
854 | } | |
855 | ||
f0f9ff95 TT |
856 | /* Default implementation of to_get_thread_local_address. */ |
857 | ||
858 | static void | |
859 | generic_tls_error (void) | |
860 | { | |
861 | throw_error (TLS_GENERIC_ERROR, | |
862 | _("Cannot find thread-local variables on this target")); | |
863 | } | |
864 | ||
72f5cf0e | 865 | /* Using the objfile specified in OBJFILE, find the address for the |
9e35dae4 DJ |
866 | current thread's thread-local storage with offset OFFSET. */ |
867 | CORE_ADDR | |
868 | target_translate_tls_address (struct objfile *objfile, CORE_ADDR offset) | |
869 | { | |
870 | volatile CORE_ADDR addr = 0; | |
f0f9ff95 | 871 | struct target_ops *target = ¤t_target; |
9e35dae4 | 872 | |
f0f9ff95 | 873 | if (gdbarch_fetch_tls_load_module_address_p (target_gdbarch ())) |
9e35dae4 DJ |
874 | { |
875 | ptid_t ptid = inferior_ptid; | |
9e35dae4 | 876 | |
492d29ea | 877 | TRY |
9e35dae4 DJ |
878 | { |
879 | CORE_ADDR lm_addr; | |
880 | ||
881 | /* Fetch the load module address for this objfile. */ | |
f5656ead | 882 | lm_addr = gdbarch_fetch_tls_load_module_address (target_gdbarch (), |
9e35dae4 | 883 | objfile); |
9e35dae4 | 884 | |
3e43a32a MS |
885 | addr = target->to_get_thread_local_address (target, ptid, |
886 | lm_addr, offset); | |
9e35dae4 DJ |
887 | } |
888 | /* If an error occurred, print TLS related messages here. Otherwise, | |
889 | throw the error to some higher catcher. */ | |
492d29ea | 890 | CATCH (ex, RETURN_MASK_ALL) |
9e35dae4 DJ |
891 | { |
892 | int objfile_is_library = (objfile->flags & OBJF_SHARED); | |
893 | ||
894 | switch (ex.error) | |
895 | { | |
896 | case TLS_NO_LIBRARY_SUPPORT_ERROR: | |
3e43a32a MS |
897 | error (_("Cannot find thread-local variables " |
898 | "in this thread library.")); | |
9e35dae4 DJ |
899 | break; |
900 | case TLS_LOAD_MODULE_NOT_FOUND_ERROR: | |
901 | if (objfile_is_library) | |
902 | error (_("Cannot find shared library `%s' in dynamic" | |
4262abfb | 903 | " linker's load module list"), objfile_name (objfile)); |
9e35dae4 DJ |
904 | else |
905 | error (_("Cannot find executable file `%s' in dynamic" | |
4262abfb | 906 | " linker's load module list"), objfile_name (objfile)); |
9e35dae4 DJ |
907 | break; |
908 | case TLS_NOT_ALLOCATED_YET_ERROR: | |
909 | if (objfile_is_library) | |
910 | error (_("The inferior has not yet allocated storage for" | |
911 | " thread-local variables in\n" | |
912 | "the shared library `%s'\n" | |
913 | "for %s"), | |
4262abfb | 914 | objfile_name (objfile), target_pid_to_str (ptid)); |
9e35dae4 DJ |
915 | else |
916 | error (_("The inferior has not yet allocated storage for" | |
917 | " thread-local variables in\n" | |
918 | "the executable `%s'\n" | |
919 | "for %s"), | |
4262abfb | 920 | objfile_name (objfile), target_pid_to_str (ptid)); |
9e35dae4 DJ |
921 | break; |
922 | case TLS_GENERIC_ERROR: | |
923 | if (objfile_is_library) | |
924 | error (_("Cannot find thread-local storage for %s, " | |
925 | "shared library %s:\n%s"), | |
926 | target_pid_to_str (ptid), | |
4262abfb | 927 | objfile_name (objfile), ex.message); |
9e35dae4 DJ |
928 | else |
929 | error (_("Cannot find thread-local storage for %s, " | |
930 | "executable file %s:\n%s"), | |
931 | target_pid_to_str (ptid), | |
4262abfb | 932 | objfile_name (objfile), ex.message); |
9e35dae4 DJ |
933 | break; |
934 | default: | |
935 | throw_exception (ex); | |
936 | break; | |
937 | } | |
938 | } | |
492d29ea | 939 | END_CATCH |
9e35dae4 DJ |
940 | } |
941 | /* It wouldn't be wrong here to try a gdbarch method, too; finding | |
942 | TLS is an ABI-specific thing. But we don't do that yet. */ | |
943 | else | |
944 | error (_("Cannot find thread-local variables on this target")); | |
945 | ||
946 | return addr; | |
947 | } | |
948 | ||
6be7b56e | 949 | const char * |
01cb8804 | 950 | target_xfer_status_to_string (enum target_xfer_status status) |
6be7b56e PA |
951 | { |
952 | #define CASE(X) case X: return #X | |
01cb8804 | 953 | switch (status) |
6be7b56e PA |
954 | { |
955 | CASE(TARGET_XFER_E_IO); | |
bc113b4e | 956 | CASE(TARGET_XFER_UNAVAILABLE); |
6be7b56e PA |
957 | default: |
958 | return "<unknown>"; | |
959 | } | |
960 | #undef CASE | |
961 | }; | |
962 | ||
963 | ||
c906108c SS |
964 | #undef MIN |
965 | #define MIN(A, B) (((A) <= (B)) ? (A) : (B)) | |
966 | ||
967 | /* target_read_string -- read a null terminated string, up to LEN bytes, | |
968 | from MEMADDR in target. Set *ERRNOP to the errno code, or 0 if successful. | |
969 | Set *STRING to a pointer to malloc'd memory containing the data; the caller | |
970 | is responsible for freeing it. Return the number of bytes successfully | |
971 | read. */ | |
972 | ||
973 | int | |
fba45db2 | 974 | target_read_string (CORE_ADDR memaddr, char **string, int len, int *errnop) |
c906108c | 975 | { |
c2e8b827 | 976 | int tlen, offset, i; |
1b0ba102 | 977 | gdb_byte buf[4]; |
c906108c SS |
978 | int errcode = 0; |
979 | char *buffer; | |
980 | int buffer_allocated; | |
981 | char *bufptr; | |
982 | unsigned int nbytes_read = 0; | |
983 | ||
6217bf3e MS |
984 | gdb_assert (string); |
985 | ||
c906108c SS |
986 | /* Small for testing. */ |
987 | buffer_allocated = 4; | |
224c3ddb | 988 | buffer = (char *) xmalloc (buffer_allocated); |
c906108c SS |
989 | bufptr = buffer; |
990 | ||
c906108c SS |
991 | while (len > 0) |
992 | { | |
993 | tlen = MIN (len, 4 - (memaddr & 3)); | |
994 | offset = memaddr & 3; | |
995 | ||
1b0ba102 | 996 | errcode = target_read_memory (memaddr & ~3, buf, sizeof buf); |
c906108c SS |
997 | if (errcode != 0) |
998 | { | |
999 | /* The transfer request might have crossed the boundary to an | |
c378eb4e | 1000 | unallocated region of memory. Retry the transfer, requesting |
c906108c SS |
1001 | a single byte. */ |
1002 | tlen = 1; | |
1003 | offset = 0; | |
b8eb5af0 | 1004 | errcode = target_read_memory (memaddr, buf, 1); |
c906108c SS |
1005 | if (errcode != 0) |
1006 | goto done; | |
1007 | } | |
1008 | ||
1009 | if (bufptr - buffer + tlen > buffer_allocated) | |
1010 | { | |
1011 | unsigned int bytes; | |
5d502164 | 1012 | |
c906108c SS |
1013 | bytes = bufptr - buffer; |
1014 | buffer_allocated *= 2; | |
224c3ddb | 1015 | buffer = (char *) xrealloc (buffer, buffer_allocated); |
c906108c SS |
1016 | bufptr = buffer + bytes; |
1017 | } | |
1018 | ||
1019 | for (i = 0; i < tlen; i++) | |
1020 | { | |
1021 | *bufptr++ = buf[i + offset]; | |
1022 | if (buf[i + offset] == '\000') | |
1023 | { | |
1024 | nbytes_read += i + 1; | |
1025 | goto done; | |
1026 | } | |
1027 | } | |
1028 | ||
1029 | memaddr += tlen; | |
1030 | len -= tlen; | |
1031 | nbytes_read += tlen; | |
1032 | } | |
c5aa993b | 1033 | done: |
6217bf3e | 1034 | *string = buffer; |
c906108c SS |
1035 | if (errnop != NULL) |
1036 | *errnop = errcode; | |
c906108c SS |
1037 | return nbytes_read; |
1038 | } | |
1039 | ||
07b82ea5 PA |
1040 | struct target_section_table * |
1041 | target_get_section_table (struct target_ops *target) | |
1042 | { | |
7e35c012 | 1043 | return (*target->to_get_section_table) (target); |
07b82ea5 PA |
1044 | } |
1045 | ||
8db32d44 | 1046 | /* Find a section containing ADDR. */ |
07b82ea5 | 1047 | |
0542c86d | 1048 | struct target_section * |
8db32d44 AC |
1049 | target_section_by_addr (struct target_ops *target, CORE_ADDR addr) |
1050 | { | |
07b82ea5 | 1051 | struct target_section_table *table = target_get_section_table (target); |
0542c86d | 1052 | struct target_section *secp; |
07b82ea5 PA |
1053 | |
1054 | if (table == NULL) | |
1055 | return NULL; | |
1056 | ||
1057 | for (secp = table->sections; secp < table->sections_end; secp++) | |
8db32d44 AC |
1058 | { |
1059 | if (addr >= secp->addr && addr < secp->endaddr) | |
1060 | return secp; | |
1061 | } | |
1062 | return NULL; | |
1063 | } | |
1064 | ||
0fec99e8 PA |
1065 | |
1066 | /* Helper for the memory xfer routines. Checks the attributes of the | |
1067 | memory region of MEMADDR against the read or write being attempted. | |
1068 | If the access is permitted returns true, otherwise returns false. | |
1069 | REGION_P is an optional output parameter. If not-NULL, it is | |
1070 | filled with a pointer to the memory region of MEMADDR. REG_LEN | |
1071 | returns LEN trimmed to the end of the region. This is how much the | |
1072 | caller can continue requesting, if the access is permitted. A | |
1073 | single xfer request must not straddle memory region boundaries. */ | |
1074 | ||
1075 | static int | |
1076 | memory_xfer_check_region (gdb_byte *readbuf, const gdb_byte *writebuf, | |
1077 | ULONGEST memaddr, ULONGEST len, ULONGEST *reg_len, | |
1078 | struct mem_region **region_p) | |
1079 | { | |
1080 | struct mem_region *region; | |
1081 | ||
1082 | region = lookup_mem_region (memaddr); | |
1083 | ||
1084 | if (region_p != NULL) | |
1085 | *region_p = region; | |
1086 | ||
1087 | switch (region->attrib.mode) | |
1088 | { | |
1089 | case MEM_RO: | |
1090 | if (writebuf != NULL) | |
1091 | return 0; | |
1092 | break; | |
1093 | ||
1094 | case MEM_WO: | |
1095 | if (readbuf != NULL) | |
1096 | return 0; | |
1097 | break; | |
1098 | ||
1099 | case MEM_FLASH: | |
1100 | /* We only support writing to flash during "load" for now. */ | |
1101 | if (writebuf != NULL) | |
1102 | error (_("Writing to flash memory forbidden in this context")); | |
1103 | break; | |
1104 | ||
1105 | case MEM_NONE: | |
1106 | return 0; | |
1107 | } | |
1108 | ||
1109 | /* region->hi == 0 means there's no upper bound. */ | |
1110 | if (memaddr + len < region->hi || region->hi == 0) | |
1111 | *reg_len = len; | |
1112 | else | |
1113 | *reg_len = region->hi - memaddr; | |
1114 | ||
1115 | return 1; | |
1116 | } | |
1117 | ||
9f713294 YQ |
1118 | /* Read memory from more than one valid target. A core file, for |
1119 | instance, could have some of memory but delegate other bits to | |
1120 | the target below it. So, we must manually try all targets. */ | |
1121 | ||
cc9f16aa | 1122 | enum target_xfer_status |
17fde6d0 | 1123 | raw_memory_xfer_partial (struct target_ops *ops, gdb_byte *readbuf, |
9b409511 YQ |
1124 | const gdb_byte *writebuf, ULONGEST memaddr, LONGEST len, |
1125 | ULONGEST *xfered_len) | |
9f713294 | 1126 | { |
9b409511 | 1127 | enum target_xfer_status res; |
9f713294 YQ |
1128 | |
1129 | do | |
1130 | { | |
1131 | res = ops->to_xfer_partial (ops, TARGET_OBJECT_MEMORY, NULL, | |
9b409511 YQ |
1132 | readbuf, writebuf, memaddr, len, |
1133 | xfered_len); | |
1134 | if (res == TARGET_XFER_OK) | |
9f713294 YQ |
1135 | break; |
1136 | ||
633785ff | 1137 | /* Stop if the target reports that the memory is not available. */ |
bc113b4e | 1138 | if (res == TARGET_XFER_UNAVAILABLE) |
633785ff MM |
1139 | break; |
1140 | ||
9f713294 YQ |
1141 | /* We want to continue past core files to executables, but not |
1142 | past a running target's memory. */ | |
1143 | if (ops->to_has_all_memory (ops)) | |
1144 | break; | |
1145 | ||
1146 | ops = ops->beneath; | |
1147 | } | |
1148 | while (ops != NULL); | |
1149 | ||
0f26cec1 PA |
1150 | /* The cache works at the raw memory level. Make sure the cache |
1151 | gets updated with raw contents no matter what kind of memory | |
1152 | object was originally being written. Note we do write-through | |
1153 | first, so that if it fails, we don't write to the cache contents | |
1154 | that never made it to the target. */ | |
1155 | if (writebuf != NULL | |
1156 | && !ptid_equal (inferior_ptid, null_ptid) | |
1157 | && target_dcache_init_p () | |
1158 | && (stack_cache_enabled_p () || code_cache_enabled_p ())) | |
1159 | { | |
1160 | DCACHE *dcache = target_dcache_get (); | |
1161 | ||
1162 | /* Note that writing to an area of memory which wasn't present | |
1163 | in the cache doesn't cause it to be loaded in. */ | |
1164 | dcache_update (dcache, res, memaddr, writebuf, *xfered_len); | |
1165 | } | |
1166 | ||
9f713294 YQ |
1167 | return res; |
1168 | } | |
1169 | ||
7f79c47e DE |
1170 | /* Perform a partial memory transfer. |
1171 | For docs see target.h, to_xfer_partial. */ | |
cf7a04e8 | 1172 | |
9b409511 | 1173 | static enum target_xfer_status |
f0ba3972 | 1174 | memory_xfer_partial_1 (struct target_ops *ops, enum target_object object, |
17fde6d0 | 1175 | gdb_byte *readbuf, const gdb_byte *writebuf, ULONGEST memaddr, |
9b409511 | 1176 | ULONGEST len, ULONGEST *xfered_len) |
0779438d | 1177 | { |
9b409511 | 1178 | enum target_xfer_status res; |
0fec99e8 | 1179 | ULONGEST reg_len; |
cf7a04e8 | 1180 | struct mem_region *region; |
4e5d721f | 1181 | struct inferior *inf; |
cf7a04e8 | 1182 | |
07b82ea5 PA |
1183 | /* For accesses to unmapped overlay sections, read directly from |
1184 | files. Must do this first, as MEMADDR may need adjustment. */ | |
1185 | if (readbuf != NULL && overlay_debugging) | |
1186 | { | |
1187 | struct obj_section *section = find_pc_overlay (memaddr); | |
5d502164 | 1188 | |
07b82ea5 PA |
1189 | if (pc_in_unmapped_range (memaddr, section)) |
1190 | { | |
1191 | struct target_section_table *table | |
1192 | = target_get_section_table (ops); | |
1193 | const char *section_name = section->the_bfd_section->name; | |
5d502164 | 1194 | |
07b82ea5 PA |
1195 | memaddr = overlay_mapped_address (memaddr, section); |
1196 | return section_table_xfer_memory_partial (readbuf, writebuf, | |
9b409511 | 1197 | memaddr, len, xfered_len, |
07b82ea5 PA |
1198 | table->sections, |
1199 | table->sections_end, | |
1200 | section_name); | |
1201 | } | |
1202 | } | |
1203 | ||
1204 | /* Try the executable files, if "trust-readonly-sections" is set. */ | |
cf7a04e8 DJ |
1205 | if (readbuf != NULL && trust_readonly) |
1206 | { | |
0542c86d | 1207 | struct target_section *secp; |
07b82ea5 | 1208 | struct target_section_table *table; |
cf7a04e8 DJ |
1209 | |
1210 | secp = target_section_by_addr (ops, memaddr); | |
1211 | if (secp != NULL | |
2b2848e2 DE |
1212 | && (bfd_get_section_flags (secp->the_bfd_section->owner, |
1213 | secp->the_bfd_section) | |
cf7a04e8 | 1214 | & SEC_READONLY)) |
07b82ea5 PA |
1215 | { |
1216 | table = target_get_section_table (ops); | |
1217 | return section_table_xfer_memory_partial (readbuf, writebuf, | |
9b409511 | 1218 | memaddr, len, xfered_len, |
07b82ea5 PA |
1219 | table->sections, |
1220 | table->sections_end, | |
1221 | NULL); | |
1222 | } | |
98646950 UW |
1223 | } |
1224 | ||
cf7a04e8 | 1225 | /* Try GDB's internal data cache. */ |
cf7a04e8 | 1226 | |
0fec99e8 PA |
1227 | if (!memory_xfer_check_region (readbuf, writebuf, memaddr, len, ®_len, |
1228 | ®ion)) | |
1229 | return TARGET_XFER_E_IO; | |
cf7a04e8 | 1230 | |
6c95b8df | 1231 | if (!ptid_equal (inferior_ptid, null_ptid)) |
c9657e70 | 1232 | inf = find_inferior_ptid (inferior_ptid); |
6c95b8df PA |
1233 | else |
1234 | inf = NULL; | |
4e5d721f DE |
1235 | |
1236 | if (inf != NULL | |
0f26cec1 | 1237 | && readbuf != NULL |
2f4d8875 PA |
1238 | /* The dcache reads whole cache lines; that doesn't play well |
1239 | with reading from a trace buffer, because reading outside of | |
1240 | the collected memory range fails. */ | |
1241 | && get_traceframe_number () == -1 | |
4e5d721f | 1242 | && (region->attrib.cache |
29453a14 YQ |
1243 | || (stack_cache_enabled_p () && object == TARGET_OBJECT_STACK_MEMORY) |
1244 | || (code_cache_enabled_p () && object == TARGET_OBJECT_CODE_MEMORY))) | |
cf7a04e8 | 1245 | { |
2a2f9fe4 YQ |
1246 | DCACHE *dcache = target_dcache_get_or_init (); |
1247 | ||
0f26cec1 PA |
1248 | return dcache_read_memory_partial (ops, dcache, memaddr, readbuf, |
1249 | reg_len, xfered_len); | |
cf7a04e8 DJ |
1250 | } |
1251 | ||
1252 | /* If none of those methods found the memory we wanted, fall back | |
1253 | to a target partial transfer. Normally a single call to | |
1254 | to_xfer_partial is enough; if it doesn't recognize an object | |
1255 | it will call the to_xfer_partial of the next target down. | |
1256 | But for memory this won't do. Memory is the only target | |
9b409511 YQ |
1257 | object which can be read from more than one valid target. |
1258 | A core file, for instance, could have some of memory but | |
1259 | delegate other bits to the target below it. So, we must | |
1260 | manually try all targets. */ | |
1261 | ||
1262 | res = raw_memory_xfer_partial (ops, readbuf, writebuf, memaddr, reg_len, | |
1263 | xfered_len); | |
cf7a04e8 DJ |
1264 | |
1265 | /* If we still haven't got anything, return the last error. We | |
1266 | give up. */ | |
1267 | return res; | |
0779438d AC |
1268 | } |
1269 | ||
f0ba3972 PA |
1270 | /* Perform a partial memory transfer. For docs see target.h, |
1271 | to_xfer_partial. */ | |
1272 | ||
9b409511 | 1273 | static enum target_xfer_status |
f0ba3972 | 1274 | memory_xfer_partial (struct target_ops *ops, enum target_object object, |
9b409511 YQ |
1275 | gdb_byte *readbuf, const gdb_byte *writebuf, |
1276 | ULONGEST memaddr, ULONGEST len, ULONGEST *xfered_len) | |
f0ba3972 | 1277 | { |
9b409511 | 1278 | enum target_xfer_status res; |
f0ba3972 PA |
1279 | |
1280 | /* Zero length requests are ok and require no work. */ | |
1281 | if (len == 0) | |
9b409511 | 1282 | return TARGET_XFER_EOF; |
f0ba3972 PA |
1283 | |
1284 | /* Fill in READBUF with breakpoint shadows, or WRITEBUF with | |
1285 | breakpoint insns, thus hiding out from higher layers whether | |
1286 | there are software breakpoints inserted in the code stream. */ | |
1287 | if (readbuf != NULL) | |
1288 | { | |
9b409511 YQ |
1289 | res = memory_xfer_partial_1 (ops, object, readbuf, NULL, memaddr, len, |
1290 | xfered_len); | |
f0ba3972 | 1291 | |
9b409511 | 1292 | if (res == TARGET_XFER_OK && !show_memory_breakpoints) |
c63528fc | 1293 | breakpoint_xfer_memory (readbuf, NULL, NULL, memaddr, *xfered_len); |
f0ba3972 PA |
1294 | } |
1295 | else | |
1296 | { | |
d7f3ff3e | 1297 | gdb_byte *buf; |
f0ba3972 PA |
1298 | struct cleanup *old_chain; |
1299 | ||
67c059c2 AB |
1300 | /* A large write request is likely to be partially satisfied |
1301 | by memory_xfer_partial_1. We will continually malloc | |
1302 | and free a copy of the entire write request for breakpoint | |
1303 | shadow handling even though we only end up writing a small | |
09c98b44 DB |
1304 | subset of it. Cap writes to a limit specified by the target |
1305 | to mitigate this. */ | |
1306 | len = min (ops->to_get_memory_xfer_limit (ops), len); | |
67c059c2 | 1307 | |
d7f3ff3e | 1308 | buf = (gdb_byte *) xmalloc (len); |
f0ba3972 PA |
1309 | old_chain = make_cleanup (xfree, buf); |
1310 | memcpy (buf, writebuf, len); | |
1311 | ||
1312 | breakpoint_xfer_memory (NULL, buf, writebuf, memaddr, len); | |
9b409511 YQ |
1313 | res = memory_xfer_partial_1 (ops, object, NULL, buf, memaddr, len, |
1314 | xfered_len); | |
f0ba3972 PA |
1315 | |
1316 | do_cleanups (old_chain); | |
1317 | } | |
1318 | ||
1319 | return res; | |
1320 | } | |
1321 | ||
8defab1a DJ |
1322 | static void |
1323 | restore_show_memory_breakpoints (void *arg) | |
1324 | { | |
1325 | show_memory_breakpoints = (uintptr_t) arg; | |
1326 | } | |
1327 | ||
1328 | struct cleanup * | |
1329 | make_show_memory_breakpoints_cleanup (int show) | |
1330 | { | |
1331 | int current = show_memory_breakpoints; | |
8defab1a | 1332 | |
5d502164 | 1333 | show_memory_breakpoints = show; |
8defab1a DJ |
1334 | return make_cleanup (restore_show_memory_breakpoints, |
1335 | (void *) (uintptr_t) current); | |
1336 | } | |
1337 | ||
7f79c47e DE |
1338 | /* For docs see target.h, to_xfer_partial. */ |
1339 | ||
9b409511 | 1340 | enum target_xfer_status |
27394598 AC |
1341 | target_xfer_partial (struct target_ops *ops, |
1342 | enum target_object object, const char *annex, | |
4ac248ca | 1343 | gdb_byte *readbuf, const gdb_byte *writebuf, |
9b409511 YQ |
1344 | ULONGEST offset, ULONGEST len, |
1345 | ULONGEST *xfered_len) | |
27394598 | 1346 | { |
9b409511 | 1347 | enum target_xfer_status retval; |
27394598 AC |
1348 | |
1349 | gdb_assert (ops->to_xfer_partial != NULL); | |
cf7a04e8 | 1350 | |
ce6d0892 YQ |
1351 | /* Transfer is done when LEN is zero. */ |
1352 | if (len == 0) | |
9b409511 | 1353 | return TARGET_XFER_EOF; |
ce6d0892 | 1354 | |
d914c394 SS |
1355 | if (writebuf && !may_write_memory) |
1356 | error (_("Writing to memory is not allowed (addr %s, len %s)"), | |
1357 | core_addr_to_string_nz (offset), plongest (len)); | |
1358 | ||
9b409511 YQ |
1359 | *xfered_len = 0; |
1360 | ||
cf7a04e8 DJ |
1361 | /* If this is a memory transfer, let the memory-specific code |
1362 | have a look at it instead. Memory transfers are more | |
1363 | complicated. */ | |
29453a14 YQ |
1364 | if (object == TARGET_OBJECT_MEMORY || object == TARGET_OBJECT_STACK_MEMORY |
1365 | || object == TARGET_OBJECT_CODE_MEMORY) | |
4e5d721f | 1366 | retval = memory_xfer_partial (ops, object, readbuf, |
9b409511 | 1367 | writebuf, offset, len, xfered_len); |
9f713294 | 1368 | else if (object == TARGET_OBJECT_RAW_MEMORY) |
cf7a04e8 | 1369 | { |
0fec99e8 PA |
1370 | /* Skip/avoid accessing the target if the memory region |
1371 | attributes block the access. Check this here instead of in | |
1372 | raw_memory_xfer_partial as otherwise we'd end up checking | |
1373 | this twice in the case of the memory_xfer_partial path is | |
1374 | taken; once before checking the dcache, and another in the | |
1375 | tail call to raw_memory_xfer_partial. */ | |
1376 | if (!memory_xfer_check_region (readbuf, writebuf, offset, len, &len, | |
1377 | NULL)) | |
1378 | return TARGET_XFER_E_IO; | |
1379 | ||
9f713294 | 1380 | /* Request the normal memory object from other layers. */ |
9b409511 YQ |
1381 | retval = raw_memory_xfer_partial (ops, readbuf, writebuf, offset, len, |
1382 | xfered_len); | |
cf7a04e8 | 1383 | } |
9f713294 YQ |
1384 | else |
1385 | retval = ops->to_xfer_partial (ops, object, annex, readbuf, | |
9b409511 | 1386 | writebuf, offset, len, xfered_len); |
cf7a04e8 | 1387 | |
27394598 AC |
1388 | if (targetdebug) |
1389 | { | |
1390 | const unsigned char *myaddr = NULL; | |
1391 | ||
1392 | fprintf_unfiltered (gdb_stdlog, | |
3e43a32a | 1393 | "%s:target_xfer_partial " |
9b409511 | 1394 | "(%d, %s, %s, %s, %s, %s) = %d, %s", |
27394598 AC |
1395 | ops->to_shortname, |
1396 | (int) object, | |
1397 | (annex ? annex : "(null)"), | |
53b71562 JB |
1398 | host_address_to_string (readbuf), |
1399 | host_address_to_string (writebuf), | |
0b1553bc | 1400 | core_addr_to_string_nz (offset), |
9b409511 YQ |
1401 | pulongest (len), retval, |
1402 | pulongest (*xfered_len)); | |
27394598 AC |
1403 | |
1404 | if (readbuf) | |
1405 | myaddr = readbuf; | |
1406 | if (writebuf) | |
1407 | myaddr = writebuf; | |
9b409511 | 1408 | if (retval == TARGET_XFER_OK && myaddr != NULL) |
27394598 AC |
1409 | { |
1410 | int i; | |
2bc416ba | 1411 | |
27394598 | 1412 | fputs_unfiltered (", bytes =", gdb_stdlog); |
9b409511 | 1413 | for (i = 0; i < *xfered_len; i++) |
27394598 | 1414 | { |
53b71562 | 1415 | if ((((intptr_t) &(myaddr[i])) & 0xf) == 0) |
27394598 AC |
1416 | { |
1417 | if (targetdebug < 2 && i > 0) | |
1418 | { | |
1419 | fprintf_unfiltered (gdb_stdlog, " ..."); | |
1420 | break; | |
1421 | } | |
1422 | fprintf_unfiltered (gdb_stdlog, "\n"); | |
1423 | } | |
2bc416ba | 1424 | |
27394598 AC |
1425 | fprintf_unfiltered (gdb_stdlog, " %02x", myaddr[i] & 0xff); |
1426 | } | |
1427 | } | |
2bc416ba | 1428 | |
27394598 AC |
1429 | fputc_unfiltered ('\n', gdb_stdlog); |
1430 | } | |
9b409511 YQ |
1431 | |
1432 | /* Check implementations of to_xfer_partial update *XFERED_LEN | |
1433 | properly. Do assertion after printing debug messages, so that we | |
1434 | can find more clues on assertion failure from debugging messages. */ | |
bc113b4e | 1435 | if (retval == TARGET_XFER_OK || retval == TARGET_XFER_UNAVAILABLE) |
9b409511 YQ |
1436 | gdb_assert (*xfered_len > 0); |
1437 | ||
27394598 AC |
1438 | return retval; |
1439 | } | |
1440 | ||
578d3588 PA |
1441 | /* Read LEN bytes of target memory at address MEMADDR, placing the |
1442 | results in GDB's memory at MYADDR. Returns either 0 for success or | |
d09f2c3f | 1443 | -1 if any error occurs. |
c906108c SS |
1444 | |
1445 | If an error occurs, no guarantee is made about the contents of the data at | |
1446 | MYADDR. In particular, the caller should not depend upon partial reads | |
1447 | filling the buffer with good data. There is no way for the caller to know | |
1448 | how much good data might have been transfered anyway. Callers that can | |
cf7a04e8 | 1449 | deal with partial reads should call target_read (which will retry until |
c378eb4e | 1450 | it makes no progress, and then return how much was transferred). */ |
c906108c SS |
1451 | |
1452 | int | |
1b162304 | 1453 | target_read_memory (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len) |
c906108c | 1454 | { |
c35b1492 PA |
1455 | /* Dispatch to the topmost target, not the flattened current_target. |
1456 | Memory accesses check target->to_has_(all_)memory, and the | |
1457 | flattened target doesn't inherit those. */ | |
1458 | if (target_read (current_target.beneath, TARGET_OBJECT_MEMORY, NULL, | |
cf7a04e8 DJ |
1459 | myaddr, memaddr, len) == len) |
1460 | return 0; | |
0779438d | 1461 | else |
d09f2c3f | 1462 | return -1; |
c906108c SS |
1463 | } |
1464 | ||
721ec300 GB |
1465 | /* See target/target.h. */ |
1466 | ||
1467 | int | |
1468 | target_read_uint32 (CORE_ADDR memaddr, uint32_t *result) | |
1469 | { | |
1470 | gdb_byte buf[4]; | |
1471 | int r; | |
1472 | ||
1473 | r = target_read_memory (memaddr, buf, sizeof buf); | |
1474 | if (r != 0) | |
1475 | return r; | |
1476 | *result = extract_unsigned_integer (buf, sizeof buf, | |
1477 | gdbarch_byte_order (target_gdbarch ())); | |
1478 | return 0; | |
1479 | } | |
1480 | ||
aee4bf85 PA |
1481 | /* Like target_read_memory, but specify explicitly that this is a read |
1482 | from the target's raw memory. That is, this read bypasses the | |
1483 | dcache, breakpoint shadowing, etc. */ | |
1484 | ||
1485 | int | |
1486 | target_read_raw_memory (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len) | |
1487 | { | |
1488 | /* See comment in target_read_memory about why the request starts at | |
1489 | current_target.beneath. */ | |
1490 | if (target_read (current_target.beneath, TARGET_OBJECT_RAW_MEMORY, NULL, | |
1491 | myaddr, memaddr, len) == len) | |
1492 | return 0; | |
1493 | else | |
d09f2c3f | 1494 | return -1; |
aee4bf85 PA |
1495 | } |
1496 | ||
4e5d721f DE |
1497 | /* Like target_read_memory, but specify explicitly that this is a read from |
1498 | the target's stack. This may trigger different cache behavior. */ | |
1499 | ||
1500 | int | |
45aa4659 | 1501 | target_read_stack (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len) |
4e5d721f | 1502 | { |
aee4bf85 PA |
1503 | /* See comment in target_read_memory about why the request starts at |
1504 | current_target.beneath. */ | |
4e5d721f DE |
1505 | if (target_read (current_target.beneath, TARGET_OBJECT_STACK_MEMORY, NULL, |
1506 | myaddr, memaddr, len) == len) | |
1507 | return 0; | |
1508 | else | |
d09f2c3f | 1509 | return -1; |
4e5d721f DE |
1510 | } |
1511 | ||
29453a14 YQ |
1512 | /* Like target_read_memory, but specify explicitly that this is a read from |
1513 | the target's code. This may trigger different cache behavior. */ | |
1514 | ||
1515 | int | |
1516 | target_read_code (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len) | |
1517 | { | |
aee4bf85 PA |
1518 | /* See comment in target_read_memory about why the request starts at |
1519 | current_target.beneath. */ | |
29453a14 YQ |
1520 | if (target_read (current_target.beneath, TARGET_OBJECT_CODE_MEMORY, NULL, |
1521 | myaddr, memaddr, len) == len) | |
1522 | return 0; | |
1523 | else | |
d09f2c3f | 1524 | return -1; |
29453a14 YQ |
1525 | } |
1526 | ||
7f79c47e | 1527 | /* Write LEN bytes from MYADDR to target memory at address MEMADDR. |
d09f2c3f PA |
1528 | Returns either 0 for success or -1 if any error occurs. If an |
1529 | error occurs, no guarantee is made about how much data got written. | |
1530 | Callers that can deal with partial writes should call | |
1531 | target_write. */ | |
7f79c47e | 1532 | |
c906108c | 1533 | int |
45aa4659 | 1534 | target_write_memory (CORE_ADDR memaddr, const gdb_byte *myaddr, ssize_t len) |
c906108c | 1535 | { |
aee4bf85 PA |
1536 | /* See comment in target_read_memory about why the request starts at |
1537 | current_target.beneath. */ | |
c35b1492 | 1538 | if (target_write (current_target.beneath, TARGET_OBJECT_MEMORY, NULL, |
cf7a04e8 DJ |
1539 | myaddr, memaddr, len) == len) |
1540 | return 0; | |
0779438d | 1541 | else |
d09f2c3f | 1542 | return -1; |
c906108c | 1543 | } |
c5aa993b | 1544 | |
f0ba3972 | 1545 | /* Write LEN bytes from MYADDR to target raw memory at address |
d09f2c3f PA |
1546 | MEMADDR. Returns either 0 for success or -1 if any error occurs. |
1547 | If an error occurs, no guarantee is made about how much data got | |
1548 | written. Callers that can deal with partial writes should call | |
1549 | target_write. */ | |
f0ba3972 PA |
1550 | |
1551 | int | |
45aa4659 | 1552 | target_write_raw_memory (CORE_ADDR memaddr, const gdb_byte *myaddr, ssize_t len) |
f0ba3972 | 1553 | { |
aee4bf85 PA |
1554 | /* See comment in target_read_memory about why the request starts at |
1555 | current_target.beneath. */ | |
f0ba3972 PA |
1556 | if (target_write (current_target.beneath, TARGET_OBJECT_RAW_MEMORY, NULL, |
1557 | myaddr, memaddr, len) == len) | |
1558 | return 0; | |
1559 | else | |
d09f2c3f | 1560 | return -1; |
f0ba3972 PA |
1561 | } |
1562 | ||
fd79ecee DJ |
1563 | /* Fetch the target's memory map. */ |
1564 | ||
1565 | VEC(mem_region_s) * | |
1566 | target_memory_map (void) | |
1567 | { | |
1568 | VEC(mem_region_s) *result; | |
1569 | struct mem_region *last_one, *this_one; | |
1570 | int ix; | |
6b2c5a57 | 1571 | result = current_target.to_memory_map (¤t_target); |
fd79ecee DJ |
1572 | if (result == NULL) |
1573 | return NULL; | |
1574 | ||
1575 | qsort (VEC_address (mem_region_s, result), | |
1576 | VEC_length (mem_region_s, result), | |
1577 | sizeof (struct mem_region), mem_region_cmp); | |
1578 | ||
1579 | /* Check that regions do not overlap. Simultaneously assign | |
1580 | a numbering for the "mem" commands to use to refer to | |
1581 | each region. */ | |
1582 | last_one = NULL; | |
1583 | for (ix = 0; VEC_iterate (mem_region_s, result, ix, this_one); ix++) | |
1584 | { | |
1585 | this_one->number = ix; | |
1586 | ||
1587 | if (last_one && last_one->hi > this_one->lo) | |
1588 | { | |
1589 | warning (_("Overlapping regions in memory map: ignoring")); | |
1590 | VEC_free (mem_region_s, result); | |
1591 | return NULL; | |
1592 | } | |
1593 | last_one = this_one; | |
1594 | } | |
1595 | ||
1596 | return result; | |
1597 | } | |
1598 | ||
a76d924d DJ |
1599 | void |
1600 | target_flash_erase (ULONGEST address, LONGEST length) | |
1601 | { | |
e8a6c6ac | 1602 | current_target.to_flash_erase (¤t_target, address, length); |
a76d924d DJ |
1603 | } |
1604 | ||
1605 | void | |
1606 | target_flash_done (void) | |
1607 | { | |
f6fb2925 | 1608 | current_target.to_flash_done (¤t_target); |
a76d924d DJ |
1609 | } |
1610 | ||
920d2a44 AC |
1611 | static void |
1612 | show_trust_readonly (struct ui_file *file, int from_tty, | |
1613 | struct cmd_list_element *c, const char *value) | |
1614 | { | |
3e43a32a MS |
1615 | fprintf_filtered (file, |
1616 | _("Mode for reading from readonly sections is %s.\n"), | |
920d2a44 AC |
1617 | value); |
1618 | } | |
3a11626d | 1619 | |
7f79c47e | 1620 | /* Target vector read/write partial wrapper functions. */ |
0088c768 | 1621 | |
9b409511 | 1622 | static enum target_xfer_status |
1e3ff5ad AC |
1623 | target_read_partial (struct target_ops *ops, |
1624 | enum target_object object, | |
1b0ba102 | 1625 | const char *annex, gdb_byte *buf, |
9b409511 YQ |
1626 | ULONGEST offset, ULONGEST len, |
1627 | ULONGEST *xfered_len) | |
1e3ff5ad | 1628 | { |
9b409511 YQ |
1629 | return target_xfer_partial (ops, object, annex, buf, NULL, offset, len, |
1630 | xfered_len); | |
1e3ff5ad AC |
1631 | } |
1632 | ||
8a55ffb0 | 1633 | static enum target_xfer_status |
1e3ff5ad AC |
1634 | target_write_partial (struct target_ops *ops, |
1635 | enum target_object object, | |
1b0ba102 | 1636 | const char *annex, const gdb_byte *buf, |
9b409511 | 1637 | ULONGEST offset, LONGEST len, ULONGEST *xfered_len) |
1e3ff5ad | 1638 | { |
9b409511 YQ |
1639 | return target_xfer_partial (ops, object, annex, NULL, buf, offset, len, |
1640 | xfered_len); | |
1e3ff5ad AC |
1641 | } |
1642 | ||
1643 | /* Wrappers to perform the full transfer. */ | |
7f79c47e DE |
1644 | |
1645 | /* For docs on target_read see target.h. */ | |
1646 | ||
1e3ff5ad AC |
1647 | LONGEST |
1648 | target_read (struct target_ops *ops, | |
1649 | enum target_object object, | |
1b0ba102 | 1650 | const char *annex, gdb_byte *buf, |
1e3ff5ad AC |
1651 | ULONGEST offset, LONGEST len) |
1652 | { | |
279a6fed | 1653 | LONGEST xfered_total = 0; |
d309493c SM |
1654 | int unit_size = 1; |
1655 | ||
1656 | /* If we are reading from a memory object, find the length of an addressable | |
1657 | unit for that architecture. */ | |
1658 | if (object == TARGET_OBJECT_MEMORY | |
1659 | || object == TARGET_OBJECT_STACK_MEMORY | |
1660 | || object == TARGET_OBJECT_CODE_MEMORY | |
1661 | || object == TARGET_OBJECT_RAW_MEMORY) | |
1662 | unit_size = gdbarch_addressable_memory_unit_size (target_gdbarch ()); | |
5d502164 | 1663 | |
279a6fed | 1664 | while (xfered_total < len) |
1e3ff5ad | 1665 | { |
279a6fed | 1666 | ULONGEST xfered_partial; |
9b409511 YQ |
1667 | enum target_xfer_status status; |
1668 | ||
1669 | status = target_read_partial (ops, object, annex, | |
d309493c | 1670 | buf + xfered_total * unit_size, |
279a6fed SM |
1671 | offset + xfered_total, len - xfered_total, |
1672 | &xfered_partial); | |
5d502164 | 1673 | |
1e3ff5ad | 1674 | /* Call an observer, notifying them of the xfer progress? */ |
9b409511 | 1675 | if (status == TARGET_XFER_EOF) |
279a6fed | 1676 | return xfered_total; |
9b409511 YQ |
1677 | else if (status == TARGET_XFER_OK) |
1678 | { | |
279a6fed | 1679 | xfered_total += xfered_partial; |
9b409511 YQ |
1680 | QUIT; |
1681 | } | |
1682 | else | |
279a6fed | 1683 | return TARGET_XFER_E_IO; |
9b409511 | 1684 | |
1e3ff5ad AC |
1685 | } |
1686 | return len; | |
1687 | } | |
1688 | ||
f1a507a1 JB |
1689 | /* Assuming that the entire [begin, end) range of memory cannot be |
1690 | read, try to read whatever subrange is possible to read. | |
1691 | ||
1692 | The function returns, in RESULT, either zero or one memory block. | |
1693 | If there's a readable subrange at the beginning, it is completely | |
1694 | read and returned. Any further readable subrange will not be read. | |
1695 | Otherwise, if there's a readable subrange at the end, it will be | |
1696 | completely read and returned. Any readable subranges before it | |
1697 | (obviously, not starting at the beginning), will be ignored. In | |
1698 | other cases -- either no readable subrange, or readable subrange(s) | |
1699 | that is neither at the beginning, or end, nothing is returned. | |
1700 | ||
1701 | The purpose of this function is to handle a read across a boundary | |
1702 | of accessible memory in a case when memory map is not available. | |
1703 | The above restrictions are fine for this case, but will give | |
1704 | incorrect results if the memory is 'patchy'. However, supporting | |
1705 | 'patchy' memory would require trying to read every single byte, | |
1706 | and it seems unacceptable solution. Explicit memory map is | |
1707 | recommended for this case -- and target_read_memory_robust will | |
1708 | take care of reading multiple ranges then. */ | |
8dedea02 VP |
1709 | |
1710 | static void | |
3e43a32a | 1711 | read_whatever_is_readable (struct target_ops *ops, |
279a6fed | 1712 | const ULONGEST begin, const ULONGEST end, |
d309493c | 1713 | int unit_size, |
8dedea02 | 1714 | VEC(memory_read_result_s) **result) |
d5086790 | 1715 | { |
224c3ddb | 1716 | gdb_byte *buf = (gdb_byte *) xmalloc (end - begin); |
8dedea02 VP |
1717 | ULONGEST current_begin = begin; |
1718 | ULONGEST current_end = end; | |
1719 | int forward; | |
1720 | memory_read_result_s r; | |
9b409511 | 1721 | ULONGEST xfered_len; |
8dedea02 VP |
1722 | |
1723 | /* If we previously failed to read 1 byte, nothing can be done here. */ | |
1724 | if (end - begin <= 1) | |
13b3fd9b MS |
1725 | { |
1726 | xfree (buf); | |
1727 | return; | |
1728 | } | |
8dedea02 VP |
1729 | |
1730 | /* Check that either first or the last byte is readable, and give up | |
c378eb4e | 1731 | if not. This heuristic is meant to permit reading accessible memory |
8dedea02 VP |
1732 | at the boundary of accessible region. */ |
1733 | if (target_read_partial (ops, TARGET_OBJECT_MEMORY, NULL, | |
9b409511 | 1734 | buf, begin, 1, &xfered_len) == TARGET_XFER_OK) |
8dedea02 VP |
1735 | { |
1736 | forward = 1; | |
1737 | ++current_begin; | |
1738 | } | |
1739 | else if (target_read_partial (ops, TARGET_OBJECT_MEMORY, NULL, | |
279a6fed | 1740 | buf + (end - begin) - 1, end - 1, 1, |
9b409511 | 1741 | &xfered_len) == TARGET_XFER_OK) |
8dedea02 VP |
1742 | { |
1743 | forward = 0; | |
1744 | --current_end; | |
1745 | } | |
1746 | else | |
1747 | { | |
13b3fd9b | 1748 | xfree (buf); |
8dedea02 VP |
1749 | return; |
1750 | } | |
1751 | ||
1752 | /* Loop invariant is that the [current_begin, current_end) was previously | |
1753 | found to be not readable as a whole. | |
1754 | ||
1755 | Note loop condition -- if the range has 1 byte, we can't divide the range | |
1756 | so there's no point trying further. */ | |
1757 | while (current_end - current_begin > 1) | |
1758 | { | |
1759 | ULONGEST first_half_begin, first_half_end; | |
1760 | ULONGEST second_half_begin, second_half_end; | |
1761 | LONGEST xfer; | |
279a6fed | 1762 | ULONGEST middle = current_begin + (current_end - current_begin) / 2; |
f1a507a1 | 1763 | |
8dedea02 VP |
1764 | if (forward) |
1765 | { | |
1766 | first_half_begin = current_begin; | |
1767 | first_half_end = middle; | |
1768 | second_half_begin = middle; | |
1769 | second_half_end = current_end; | |
1770 | } | |
1771 | else | |
1772 | { | |
1773 | first_half_begin = middle; | |
1774 | first_half_end = current_end; | |
1775 | second_half_begin = current_begin; | |
1776 | second_half_end = middle; | |
1777 | } | |
1778 | ||
1779 | xfer = target_read (ops, TARGET_OBJECT_MEMORY, NULL, | |
d309493c | 1780 | buf + (first_half_begin - begin) * unit_size, |
8dedea02 VP |
1781 | first_half_begin, |
1782 | first_half_end - first_half_begin); | |
1783 | ||
1784 | if (xfer == first_half_end - first_half_begin) | |
1785 | { | |
c378eb4e | 1786 | /* This half reads up fine. So, the error must be in the |
3e43a32a | 1787 | other half. */ |
8dedea02 VP |
1788 | current_begin = second_half_begin; |
1789 | current_end = second_half_end; | |
1790 | } | |
1791 | else | |
1792 | { | |
c378eb4e | 1793 | /* This half is not readable. Because we've tried one byte, we |
279a6fed | 1794 | know some part of this half if actually readable. Go to the next |
8dedea02 VP |
1795 | iteration to divide again and try to read. |
1796 | ||
1797 | We don't handle the other half, because this function only tries | |
1798 | to read a single readable subrange. */ | |
1799 | current_begin = first_half_begin; | |
1800 | current_end = first_half_end; | |
1801 | } | |
1802 | } | |
1803 | ||
1804 | if (forward) | |
1805 | { | |
1806 | /* The [begin, current_begin) range has been read. */ | |
1807 | r.begin = begin; | |
1808 | r.end = current_begin; | |
1809 | r.data = buf; | |
1810 | } | |
1811 | else | |
1812 | { | |
1813 | /* The [current_end, end) range has been read. */ | |
279a6fed | 1814 | LONGEST region_len = end - current_end; |
f1a507a1 | 1815 | |
224c3ddb | 1816 | r.data = (gdb_byte *) xmalloc (region_len * unit_size); |
d309493c SM |
1817 | memcpy (r.data, buf + (current_end - begin) * unit_size, |
1818 | region_len * unit_size); | |
8dedea02 VP |
1819 | r.begin = current_end; |
1820 | r.end = end; | |
1821 | xfree (buf); | |
1822 | } | |
1823 | VEC_safe_push(memory_read_result_s, (*result), &r); | |
1824 | } | |
1825 | ||
1826 | void | |
1827 | free_memory_read_result_vector (void *x) | |
1828 | { | |
9d78f827 | 1829 | VEC(memory_read_result_s) **v = (VEC(memory_read_result_s) **) x; |
8dedea02 VP |
1830 | memory_read_result_s *current; |
1831 | int ix; | |
1832 | ||
9d78f827 | 1833 | for (ix = 0; VEC_iterate (memory_read_result_s, *v, ix, current); ++ix) |
8dedea02 VP |
1834 | { |
1835 | xfree (current->data); | |
1836 | } | |
9d78f827 | 1837 | VEC_free (memory_read_result_s, *v); |
8dedea02 VP |
1838 | } |
1839 | ||
1840 | VEC(memory_read_result_s) * | |
279a6fed SM |
1841 | read_memory_robust (struct target_ops *ops, |
1842 | const ULONGEST offset, const LONGEST len) | |
8dedea02 VP |
1843 | { |
1844 | VEC(memory_read_result_s) *result = 0; | |
d309493c | 1845 | int unit_size = gdbarch_addressable_memory_unit_size (target_gdbarch ()); |
9d78f827 TT |
1846 | struct cleanup *cleanup = make_cleanup (free_memory_read_result_vector, |
1847 | &result); | |
8dedea02 | 1848 | |
279a6fed SM |
1849 | LONGEST xfered_total = 0; |
1850 | while (xfered_total < len) | |
d5086790 | 1851 | { |
279a6fed SM |
1852 | struct mem_region *region = lookup_mem_region (offset + xfered_total); |
1853 | LONGEST region_len; | |
5d502164 | 1854 | |
8dedea02 VP |
1855 | /* If there is no explicit region, a fake one should be created. */ |
1856 | gdb_assert (region); | |
1857 | ||
1858 | if (region->hi == 0) | |
279a6fed | 1859 | region_len = len - xfered_total; |
8dedea02 | 1860 | else |
279a6fed | 1861 | region_len = region->hi - offset; |
8dedea02 VP |
1862 | |
1863 | if (region->attrib.mode == MEM_NONE || region->attrib.mode == MEM_WO) | |
d5086790 | 1864 | { |
c378eb4e | 1865 | /* Cannot read this region. Note that we can end up here only |
8dedea02 VP |
1866 | if the region is explicitly marked inaccessible, or |
1867 | 'inaccessible-by-default' is in effect. */ | |
279a6fed | 1868 | xfered_total += region_len; |
8dedea02 VP |
1869 | } |
1870 | else | |
1871 | { | |
279a6fed | 1872 | LONGEST to_read = min (len - xfered_total, region_len); |
d309493c | 1873 | gdb_byte *buffer = (gdb_byte *) xmalloc (to_read * unit_size); |
9d78f827 | 1874 | struct cleanup *inner_cleanup = make_cleanup (xfree, buffer); |
8dedea02 | 1875 | |
279a6fed SM |
1876 | LONGEST xfered_partial = |
1877 | target_read (ops, TARGET_OBJECT_MEMORY, NULL, | |
1878 | (gdb_byte *) buffer, | |
1879 | offset + xfered_total, to_read); | |
8dedea02 | 1880 | /* Call an observer, notifying them of the xfer progress? */ |
279a6fed | 1881 | if (xfered_partial <= 0) |
d5086790 | 1882 | { |
c378eb4e | 1883 | /* Got an error reading full chunk. See if maybe we can read |
8dedea02 | 1884 | some subrange. */ |
9d78f827 | 1885 | do_cleanups (inner_cleanup); |
e084c964 DB |
1886 | read_whatever_is_readable (ops, offset + xfered_total, |
1887 | offset + xfered_total + to_read, | |
1888 | unit_size, &result); | |
279a6fed | 1889 | xfered_total += to_read; |
d5086790 | 1890 | } |
8dedea02 VP |
1891 | else |
1892 | { | |
1893 | struct memory_read_result r; | |
9d78f827 TT |
1894 | |
1895 | discard_cleanups (inner_cleanup); | |
8dedea02 | 1896 | r.data = buffer; |
279a6fed SM |
1897 | r.begin = offset + xfered_total; |
1898 | r.end = r.begin + xfered_partial; | |
8dedea02 | 1899 | VEC_safe_push (memory_read_result_s, result, &r); |
279a6fed | 1900 | xfered_total += xfered_partial; |
8dedea02 VP |
1901 | } |
1902 | QUIT; | |
d5086790 | 1903 | } |
d5086790 | 1904 | } |
9d78f827 TT |
1905 | |
1906 | discard_cleanups (cleanup); | |
8dedea02 | 1907 | return result; |
d5086790 VP |
1908 | } |
1909 | ||
8dedea02 | 1910 | |
cf7a04e8 DJ |
1911 | /* An alternative to target_write with progress callbacks. */ |
1912 | ||
1e3ff5ad | 1913 | LONGEST |
cf7a04e8 DJ |
1914 | target_write_with_progress (struct target_ops *ops, |
1915 | enum target_object object, | |
1916 | const char *annex, const gdb_byte *buf, | |
1917 | ULONGEST offset, LONGEST len, | |
1918 | void (*progress) (ULONGEST, void *), void *baton) | |
1e3ff5ad | 1919 | { |
279a6fed | 1920 | LONGEST xfered_total = 0; |
d309493c SM |
1921 | int unit_size = 1; |
1922 | ||
1923 | /* If we are writing to a memory object, find the length of an addressable | |
1924 | unit for that architecture. */ | |
1925 | if (object == TARGET_OBJECT_MEMORY | |
1926 | || object == TARGET_OBJECT_STACK_MEMORY | |
1927 | || object == TARGET_OBJECT_CODE_MEMORY | |
1928 | || object == TARGET_OBJECT_RAW_MEMORY) | |
1929 | unit_size = gdbarch_addressable_memory_unit_size (target_gdbarch ()); | |
a76d924d DJ |
1930 | |
1931 | /* Give the progress callback a chance to set up. */ | |
1932 | if (progress) | |
1933 | (*progress) (0, baton); | |
1934 | ||
279a6fed | 1935 | while (xfered_total < len) |
1e3ff5ad | 1936 | { |
279a6fed | 1937 | ULONGEST xfered_partial; |
9b409511 YQ |
1938 | enum target_xfer_status status; |
1939 | ||
1940 | status = target_write_partial (ops, object, annex, | |
d309493c | 1941 | buf + xfered_total * unit_size, |
279a6fed SM |
1942 | offset + xfered_total, len - xfered_total, |
1943 | &xfered_partial); | |
cf7a04e8 | 1944 | |
5c328c05 | 1945 | if (status != TARGET_XFER_OK) |
279a6fed | 1946 | return status == TARGET_XFER_EOF ? xfered_total : TARGET_XFER_E_IO; |
cf7a04e8 DJ |
1947 | |
1948 | if (progress) | |
279a6fed | 1949 | (*progress) (xfered_partial, baton); |
cf7a04e8 | 1950 | |
279a6fed | 1951 | xfered_total += xfered_partial; |
1e3ff5ad AC |
1952 | QUIT; |
1953 | } | |
1954 | return len; | |
1955 | } | |
1956 | ||
7f79c47e DE |
1957 | /* For docs on target_write see target.h. */ |
1958 | ||
cf7a04e8 DJ |
1959 | LONGEST |
1960 | target_write (struct target_ops *ops, | |
1961 | enum target_object object, | |
1962 | const char *annex, const gdb_byte *buf, | |
1963 | ULONGEST offset, LONGEST len) | |
1964 | { | |
1965 | return target_write_with_progress (ops, object, annex, buf, offset, len, | |
1966 | NULL, NULL); | |
1967 | } | |
1968 | ||
159f81f3 DJ |
1969 | /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return |
1970 | the size of the transferred data. PADDING additional bytes are | |
1971 | available in *BUF_P. This is a helper function for | |
1972 | target_read_alloc; see the declaration of that function for more | |
1973 | information. */ | |
13547ab6 | 1974 | |
159f81f3 DJ |
1975 | static LONGEST |
1976 | target_read_alloc_1 (struct target_ops *ops, enum target_object object, | |
1977 | const char *annex, gdb_byte **buf_p, int padding) | |
13547ab6 DJ |
1978 | { |
1979 | size_t buf_alloc, buf_pos; | |
1980 | gdb_byte *buf; | |
13547ab6 DJ |
1981 | |
1982 | /* This function does not have a length parameter; it reads the | |
1983 | entire OBJECT). Also, it doesn't support objects fetched partly | |
1984 | from one target and partly from another (in a different stratum, | |
1985 | e.g. a core file and an executable). Both reasons make it | |
1986 | unsuitable for reading memory. */ | |
1987 | gdb_assert (object != TARGET_OBJECT_MEMORY); | |
1988 | ||
1989 | /* Start by reading up to 4K at a time. The target will throttle | |
1990 | this number down if necessary. */ | |
1991 | buf_alloc = 4096; | |
224c3ddb | 1992 | buf = (gdb_byte *) xmalloc (buf_alloc); |
13547ab6 DJ |
1993 | buf_pos = 0; |
1994 | while (1) | |
1995 | { | |
9b409511 YQ |
1996 | ULONGEST xfered_len; |
1997 | enum target_xfer_status status; | |
1998 | ||
1999 | status = target_read_partial (ops, object, annex, &buf[buf_pos], | |
2000 | buf_pos, buf_alloc - buf_pos - padding, | |
2001 | &xfered_len); | |
2002 | ||
2003 | if (status == TARGET_XFER_EOF) | |
13547ab6 DJ |
2004 | { |
2005 | /* Read all there was. */ | |
2006 | if (buf_pos == 0) | |
2007 | xfree (buf); | |
2008 | else | |
2009 | *buf_p = buf; | |
2010 | return buf_pos; | |
2011 | } | |
9b409511 YQ |
2012 | else if (status != TARGET_XFER_OK) |
2013 | { | |
2014 | /* An error occurred. */ | |
2015 | xfree (buf); | |
2016 | return TARGET_XFER_E_IO; | |
2017 | } | |
13547ab6 | 2018 | |
9b409511 | 2019 | buf_pos += xfered_len; |
13547ab6 DJ |
2020 | |
2021 | /* If the buffer is filling up, expand it. */ | |
2022 | if (buf_alloc < buf_pos * 2) | |
2023 | { | |
2024 | buf_alloc *= 2; | |
224c3ddb | 2025 | buf = (gdb_byte *) xrealloc (buf, buf_alloc); |
13547ab6 DJ |
2026 | } |
2027 | ||
2028 | QUIT; | |
2029 | } | |
2030 | } | |
2031 | ||
159f81f3 DJ |
2032 | /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return |
2033 | the size of the transferred data. See the declaration in "target.h" | |
2034 | function for more information about the return value. */ | |
2035 | ||
2036 | LONGEST | |
2037 | target_read_alloc (struct target_ops *ops, enum target_object object, | |
2038 | const char *annex, gdb_byte **buf_p) | |
2039 | { | |
2040 | return target_read_alloc_1 (ops, object, annex, buf_p, 0); | |
2041 | } | |
2042 | ||
2043 | /* Read OBJECT/ANNEX using OPS. The result is NUL-terminated and | |
2044 | returned as a string, allocated using xmalloc. If an error occurs | |
2045 | or the transfer is unsupported, NULL is returned. Empty objects | |
2046 | are returned as allocated but empty strings. A warning is issued | |
2047 | if the result contains any embedded NUL bytes. */ | |
2048 | ||
2049 | char * | |
2050 | target_read_stralloc (struct target_ops *ops, enum target_object object, | |
2051 | const char *annex) | |
2052 | { | |
39086a0e PA |
2053 | gdb_byte *buffer; |
2054 | char *bufstr; | |
7313baad | 2055 | LONGEST i, transferred; |
159f81f3 | 2056 | |
39086a0e PA |
2057 | transferred = target_read_alloc_1 (ops, object, annex, &buffer, 1); |
2058 | bufstr = (char *) buffer; | |
159f81f3 DJ |
2059 | |
2060 | if (transferred < 0) | |
2061 | return NULL; | |
2062 | ||
2063 | if (transferred == 0) | |
2064 | return xstrdup (""); | |
2065 | ||
39086a0e | 2066 | bufstr[transferred] = 0; |
7313baad UW |
2067 | |
2068 | /* Check for embedded NUL bytes; but allow trailing NULs. */ | |
39086a0e PA |
2069 | for (i = strlen (bufstr); i < transferred; i++) |
2070 | if (bufstr[i] != 0) | |
7313baad UW |
2071 | { |
2072 | warning (_("target object %d, annex %s, " | |
2073 | "contained unexpected null characters"), | |
2074 | (int) object, annex ? annex : "(none)"); | |
2075 | break; | |
2076 | } | |
159f81f3 | 2077 | |
39086a0e | 2078 | return bufstr; |
159f81f3 DJ |
2079 | } |
2080 | ||
b6591e8b AC |
2081 | /* Memory transfer methods. */ |
2082 | ||
2083 | void | |
1b0ba102 | 2084 | get_target_memory (struct target_ops *ops, CORE_ADDR addr, gdb_byte *buf, |
b6591e8b AC |
2085 | LONGEST len) |
2086 | { | |
07b82ea5 PA |
2087 | /* This method is used to read from an alternate, non-current |
2088 | target. This read must bypass the overlay support (as symbols | |
2089 | don't match this target), and GDB's internal cache (wrong cache | |
2090 | for this target). */ | |
2091 | if (target_read (ops, TARGET_OBJECT_RAW_MEMORY, NULL, buf, addr, len) | |
b6591e8b | 2092 | != len) |
578d3588 | 2093 | memory_error (TARGET_XFER_E_IO, addr); |
b6591e8b AC |
2094 | } |
2095 | ||
2096 | ULONGEST | |
5d502164 MS |
2097 | get_target_memory_unsigned (struct target_ops *ops, CORE_ADDR addr, |
2098 | int len, enum bfd_endian byte_order) | |
b6591e8b | 2099 | { |
f6519ebc | 2100 | gdb_byte buf[sizeof (ULONGEST)]; |
b6591e8b AC |
2101 | |
2102 | gdb_assert (len <= sizeof (buf)); | |
2103 | get_target_memory (ops, addr, buf, len); | |
e17a4113 | 2104 | return extract_unsigned_integer (buf, len, byte_order); |
b6591e8b AC |
2105 | } |
2106 | ||
3db08215 MM |
2107 | /* See target.h. */ |
2108 | ||
d914c394 SS |
2109 | int |
2110 | target_insert_breakpoint (struct gdbarch *gdbarch, | |
2111 | struct bp_target_info *bp_tgt) | |
2112 | { | |
2113 | if (!may_insert_breakpoints) | |
2114 | { | |
2115 | warning (_("May not insert breakpoints")); | |
2116 | return 1; | |
2117 | } | |
2118 | ||
6b84065d TT |
2119 | return current_target.to_insert_breakpoint (¤t_target, |
2120 | gdbarch, bp_tgt); | |
d914c394 SS |
2121 | } |
2122 | ||
3db08215 MM |
2123 | /* See target.h. */ |
2124 | ||
d914c394 | 2125 | int |
6b84065d TT |
2126 | target_remove_breakpoint (struct gdbarch *gdbarch, |
2127 | struct bp_target_info *bp_tgt) | |
d914c394 SS |
2128 | { |
2129 | /* This is kind of a weird case to handle, but the permission might | |
2130 | have been changed after breakpoints were inserted - in which case | |
2131 | we should just take the user literally and assume that any | |
2132 | breakpoints should be left in place. */ | |
2133 | if (!may_insert_breakpoints) | |
2134 | { | |
2135 | warning (_("May not remove breakpoints")); | |
2136 | return 1; | |
2137 | } | |
2138 | ||
6b84065d TT |
2139 | return current_target.to_remove_breakpoint (¤t_target, |
2140 | gdbarch, bp_tgt); | |
d914c394 SS |
2141 | } |
2142 | ||
c906108c | 2143 | static void |
fba45db2 | 2144 | target_info (char *args, int from_tty) |
c906108c SS |
2145 | { |
2146 | struct target_ops *t; | |
c906108c | 2147 | int has_all_mem = 0; |
c5aa993b | 2148 | |
c906108c | 2149 | if (symfile_objfile != NULL) |
4262abfb JK |
2150 | printf_unfiltered (_("Symbols from \"%s\".\n"), |
2151 | objfile_name (symfile_objfile)); | |
c906108c | 2152 | |
258b763a | 2153 | for (t = target_stack; t != NULL; t = t->beneath) |
c906108c | 2154 | { |
c35b1492 | 2155 | if (!(*t->to_has_memory) (t)) |
c906108c SS |
2156 | continue; |
2157 | ||
c5aa993b | 2158 | if ((int) (t->to_stratum) <= (int) dummy_stratum) |
c906108c SS |
2159 | continue; |
2160 | if (has_all_mem) | |
3e43a32a MS |
2161 | printf_unfiltered (_("\tWhile running this, " |
2162 | "GDB does not access memory from...\n")); | |
c5aa993b JM |
2163 | printf_unfiltered ("%s:\n", t->to_longname); |
2164 | (t->to_files_info) (t); | |
c35b1492 | 2165 | has_all_mem = (*t->to_has_all_memory) (t); |
c906108c SS |
2166 | } |
2167 | } | |
2168 | ||
fd79ecee DJ |
2169 | /* This function is called before any new inferior is created, e.g. |
2170 | by running a program, attaching, or connecting to a target. | |
2171 | It cleans up any state from previous invocations which might | |
2172 | change between runs. This is a subset of what target_preopen | |
2173 | resets (things which might change between targets). */ | |
2174 | ||
2175 | void | |
2176 | target_pre_inferior (int from_tty) | |
2177 | { | |
c378eb4e | 2178 | /* Clear out solib state. Otherwise the solib state of the previous |
b9db4ced | 2179 | inferior might have survived and is entirely wrong for the new |
c378eb4e | 2180 | target. This has been observed on GNU/Linux using glibc 2.3. How |
b9db4ced UW |
2181 | to reproduce: |
2182 | ||
2183 | bash$ ./foo& | |
2184 | [1] 4711 | |
2185 | bash$ ./foo& | |
2186 | [1] 4712 | |
2187 | bash$ gdb ./foo | |
2188 | [...] | |
2189 | (gdb) attach 4711 | |
2190 | (gdb) detach | |
2191 | (gdb) attach 4712 | |
2192 | Cannot access memory at address 0xdeadbeef | |
2193 | */ | |
b9db4ced | 2194 | |
50c71eaf PA |
2195 | /* In some OSs, the shared library list is the same/global/shared |
2196 | across inferiors. If code is shared between processes, so are | |
2197 | memory regions and features. */ | |
f5656ead | 2198 | if (!gdbarch_has_global_solist (target_gdbarch ())) |
50c71eaf PA |
2199 | { |
2200 | no_shared_libraries (NULL, from_tty); | |
2201 | ||
2202 | invalidate_target_mem_regions (); | |
424163ea | 2203 | |
50c71eaf PA |
2204 | target_clear_description (); |
2205 | } | |
8ffcbaaf | 2206 | |
e9756d52 PP |
2207 | /* attach_flag may be set if the previous process associated with |
2208 | the inferior was attached to. */ | |
2209 | current_inferior ()->attach_flag = 0; | |
2210 | ||
5d5658a1 PA |
2211 | current_inferior ()->highest_thread_num = 0; |
2212 | ||
8ffcbaaf | 2213 | agent_capability_invalidate (); |
fd79ecee DJ |
2214 | } |
2215 | ||
b8fa0bfa PA |
2216 | /* Callback for iterate_over_inferiors. Gets rid of the given |
2217 | inferior. */ | |
2218 | ||
2219 | static int | |
2220 | dispose_inferior (struct inferior *inf, void *args) | |
2221 | { | |
2222 | struct thread_info *thread; | |
2223 | ||
2224 | thread = any_thread_of_process (inf->pid); | |
2225 | if (thread) | |
2226 | { | |
2227 | switch_to_thread (thread->ptid); | |
2228 | ||
2229 | /* Core inferiors actually should be detached, not killed. */ | |
2230 | if (target_has_execution) | |
2231 | target_kill (); | |
2232 | else | |
2233 | target_detach (NULL, 0); | |
2234 | } | |
2235 | ||
2236 | return 0; | |
2237 | } | |
2238 | ||
c906108c SS |
2239 | /* This is to be called by the open routine before it does |
2240 | anything. */ | |
2241 | ||
2242 | void | |
fba45db2 | 2243 | target_preopen (int from_tty) |
c906108c | 2244 | { |
c5aa993b | 2245 | dont_repeat (); |
c906108c | 2246 | |
b8fa0bfa | 2247 | if (have_inferiors ()) |
c5aa993b | 2248 | { |
adf40b2e | 2249 | if (!from_tty |
b8fa0bfa PA |
2250 | || !have_live_inferiors () |
2251 | || query (_("A program is being debugged already. Kill it? "))) | |
2252 | iterate_over_inferiors (dispose_inferior, NULL); | |
c906108c | 2253 | else |
8a3fe4f8 | 2254 | error (_("Program not killed.")); |
c906108c SS |
2255 | } |
2256 | ||
2257 | /* Calling target_kill may remove the target from the stack. But if | |
2258 | it doesn't (which seems like a win for UDI), remove it now. */ | |
87ab71f0 PA |
2259 | /* Leave the exec target, though. The user may be switching from a |
2260 | live process to a core of the same program. */ | |
460014f5 | 2261 | pop_all_targets_above (file_stratum); |
fd79ecee DJ |
2262 | |
2263 | target_pre_inferior (from_tty); | |
c906108c SS |
2264 | } |
2265 | ||
2266 | /* Detach a target after doing deferred register stores. */ | |
2267 | ||
2268 | void | |
52554a0e | 2269 | target_detach (const char *args, int from_tty) |
c906108c | 2270 | { |
f5656ead | 2271 | if (gdbarch_has_global_breakpoints (target_gdbarch ())) |
50c71eaf PA |
2272 | /* Don't remove global breakpoints here. They're removed on |
2273 | disconnection from the target. */ | |
2274 | ; | |
2275 | else | |
2276 | /* If we're in breakpoints-always-inserted mode, have to remove | |
2277 | them before detaching. */ | |
dfd4cc63 | 2278 | remove_breakpoints_pid (ptid_get_pid (inferior_ptid)); |
74960c60 | 2279 | |
24291992 PA |
2280 | prepare_for_detach (); |
2281 | ||
09da0d0a | 2282 | current_target.to_detach (¤t_target, args, from_tty); |
c906108c SS |
2283 | } |
2284 | ||
6ad8ae5c | 2285 | void |
fee354ee | 2286 | target_disconnect (const char *args, int from_tty) |
6ad8ae5c | 2287 | { |
50c71eaf PA |
2288 | /* If we're in breakpoints-always-inserted mode or if breakpoints |
2289 | are global across processes, we have to remove them before | |
2290 | disconnecting. */ | |
74960c60 VP |
2291 | remove_breakpoints (); |
2292 | ||
86a0854a | 2293 | current_target.to_disconnect (¤t_target, args, from_tty); |
6ad8ae5c DJ |
2294 | } |
2295 | ||
117de6a9 | 2296 | ptid_t |
47608cb1 | 2297 | target_wait (ptid_t ptid, struct target_waitstatus *status, int options) |
117de6a9 | 2298 | { |
a7068b60 | 2299 | return (current_target.to_wait) (¤t_target, ptid, status, options); |
117de6a9 PA |
2300 | } |
2301 | ||
0b333c5e PA |
2302 | /* See target.h. */ |
2303 | ||
2304 | ptid_t | |
2305 | default_target_wait (struct target_ops *ops, | |
2306 | ptid_t ptid, struct target_waitstatus *status, | |
2307 | int options) | |
2308 | { | |
2309 | status->kind = TARGET_WAITKIND_IGNORE; | |
2310 | return minus_one_ptid; | |
2311 | } | |
2312 | ||
117de6a9 PA |
2313 | char * |
2314 | target_pid_to_str (ptid_t ptid) | |
2315 | { | |
770234d3 | 2316 | return (*current_target.to_pid_to_str) (¤t_target, ptid); |
117de6a9 PA |
2317 | } |
2318 | ||
73ede765 | 2319 | const char * |
4694da01 TT |
2320 | target_thread_name (struct thread_info *info) |
2321 | { | |
825828fc | 2322 | return current_target.to_thread_name (¤t_target, info); |
4694da01 TT |
2323 | } |
2324 | ||
e1ac3328 | 2325 | void |
2ea28649 | 2326 | target_resume (ptid_t ptid, int step, enum gdb_signal signal) |
e1ac3328 | 2327 | { |
4e5d721f | 2328 | target_dcache_invalidate (); |
28439f5e | 2329 | |
6b84065d | 2330 | current_target.to_resume (¤t_target, ptid, step, signal); |
28439f5e | 2331 | |
6b84065d | 2332 | registers_changed_ptid (ptid); |
251bde03 PA |
2333 | /* We only set the internal executing state here. The user/frontend |
2334 | running state is set at a higher level. */ | |
6b84065d | 2335 | set_executing (ptid, 1); |
6b84065d | 2336 | clear_inline_frame_state (ptid); |
e1ac3328 | 2337 | } |
2455069d UW |
2338 | |
2339 | void | |
2340 | target_pass_signals (int numsigs, unsigned char *pass_signals) | |
2341 | { | |
035cad7f | 2342 | (*current_target.to_pass_signals) (¤t_target, numsigs, pass_signals); |
2455069d UW |
2343 | } |
2344 | ||
9b224c5e PA |
2345 | void |
2346 | target_program_signals (int numsigs, unsigned char *program_signals) | |
2347 | { | |
7d4f8efa TT |
2348 | (*current_target.to_program_signals) (¤t_target, |
2349 | numsigs, program_signals); | |
9b224c5e PA |
2350 | } |
2351 | ||
098dba18 TT |
2352 | static int |
2353 | default_follow_fork (struct target_ops *self, int follow_child, | |
2354 | int detach_fork) | |
2355 | { | |
2356 | /* Some target returned a fork event, but did not know how to follow it. */ | |
2357 | internal_error (__FILE__, __LINE__, | |
2358 | _("could not find a target to follow fork")); | |
2359 | } | |
2360 | ||
ee057212 DJ |
2361 | /* Look through the list of possible targets for a target that can |
2362 | follow forks. */ | |
2363 | ||
2364 | int | |
07107ca6 | 2365 | target_follow_fork (int follow_child, int detach_fork) |
ee057212 | 2366 | { |
a7068b60 TT |
2367 | return current_target.to_follow_fork (¤t_target, |
2368 | follow_child, detach_fork); | |
ee057212 DJ |
2369 | } |
2370 | ||
94585166 DB |
2371 | /* Target wrapper for follow exec hook. */ |
2372 | ||
2373 | void | |
2374 | target_follow_exec (struct inferior *inf, char *execd_pathname) | |
2375 | { | |
2376 | current_target.to_follow_exec (¤t_target, inf, execd_pathname); | |
2377 | } | |
2378 | ||
8d657035 TT |
2379 | static void |
2380 | default_mourn_inferior (struct target_ops *self) | |
2381 | { | |
2382 | internal_error (__FILE__, __LINE__, | |
2383 | _("could not find a target to follow mourn inferior")); | |
2384 | } | |
2385 | ||
136d6dae VP |
2386 | void |
2387 | target_mourn_inferior (void) | |
2388 | { | |
8d657035 | 2389 | current_target.to_mourn_inferior (¤t_target); |
136d6dae | 2390 | |
8d657035 TT |
2391 | /* We no longer need to keep handles on any of the object files. |
2392 | Make sure to release them to avoid unnecessarily locking any | |
2393 | of them while we're not actually debugging. */ | |
2394 | bfd_cache_close_all (); | |
136d6dae VP |
2395 | } |
2396 | ||
424163ea DJ |
2397 | /* Look for a target which can describe architectural features, starting |
2398 | from TARGET. If we find one, return its description. */ | |
2399 | ||
2400 | const struct target_desc * | |
2401 | target_read_description (struct target_ops *target) | |
2402 | { | |
2117c711 | 2403 | return target->to_read_description (target); |
424163ea DJ |
2404 | } |
2405 | ||
58a5184e | 2406 | /* This implements a basic search of memory, reading target memory and |
08388c79 DE |
2407 | performing the search here (as opposed to performing the search in on the |
2408 | target side with, for example, gdbserver). */ | |
2409 | ||
2410 | int | |
2411 | simple_search_memory (struct target_ops *ops, | |
2412 | CORE_ADDR start_addr, ULONGEST search_space_len, | |
2413 | const gdb_byte *pattern, ULONGEST pattern_len, | |
2414 | CORE_ADDR *found_addrp) | |
2415 | { | |
2416 | /* NOTE: also defined in find.c testcase. */ | |
2417 | #define SEARCH_CHUNK_SIZE 16000 | |
2418 | const unsigned chunk_size = SEARCH_CHUNK_SIZE; | |
2419 | /* Buffer to hold memory contents for searching. */ | |
2420 | gdb_byte *search_buf; | |
2421 | unsigned search_buf_size; | |
2422 | struct cleanup *old_cleanups; | |
2423 | ||
2424 | search_buf_size = chunk_size + pattern_len - 1; | |
2425 | ||
2426 | /* No point in trying to allocate a buffer larger than the search space. */ | |
2427 | if (search_space_len < search_buf_size) | |
2428 | search_buf_size = search_space_len; | |
2429 | ||
224c3ddb | 2430 | search_buf = (gdb_byte *) malloc (search_buf_size); |
08388c79 | 2431 | if (search_buf == NULL) |
5e1471f5 | 2432 | error (_("Unable to allocate memory to perform the search.")); |
08388c79 DE |
2433 | old_cleanups = make_cleanup (free_current_contents, &search_buf); |
2434 | ||
2435 | /* Prime the search buffer. */ | |
2436 | ||
2437 | if (target_read (ops, TARGET_OBJECT_MEMORY, NULL, | |
2438 | search_buf, start_addr, search_buf_size) != search_buf_size) | |
2439 | { | |
b3dc46ff AB |
2440 | warning (_("Unable to access %s bytes of target " |
2441 | "memory at %s, halting search."), | |
2442 | pulongest (search_buf_size), hex_string (start_addr)); | |
08388c79 DE |
2443 | do_cleanups (old_cleanups); |
2444 | return -1; | |
2445 | } | |
2446 | ||
2447 | /* Perform the search. | |
2448 | ||
2449 | The loop is kept simple by allocating [N + pattern-length - 1] bytes. | |
2450 | When we've scanned N bytes we copy the trailing bytes to the start and | |
2451 | read in another N bytes. */ | |
2452 | ||
2453 | while (search_space_len >= pattern_len) | |
2454 | { | |
2455 | gdb_byte *found_ptr; | |
2456 | unsigned nr_search_bytes = min (search_space_len, search_buf_size); | |
2457 | ||
d7f3ff3e SM |
2458 | found_ptr = (gdb_byte *) memmem (search_buf, nr_search_bytes, |
2459 | pattern, pattern_len); | |
08388c79 DE |
2460 | |
2461 | if (found_ptr != NULL) | |
2462 | { | |
2463 | CORE_ADDR found_addr = start_addr + (found_ptr - search_buf); | |
5d502164 | 2464 | |
08388c79 DE |
2465 | *found_addrp = found_addr; |
2466 | do_cleanups (old_cleanups); | |
2467 | return 1; | |
2468 | } | |
2469 | ||
2470 | /* Not found in this chunk, skip to next chunk. */ | |
2471 | ||
2472 | /* Don't let search_space_len wrap here, it's unsigned. */ | |
2473 | if (search_space_len >= chunk_size) | |
2474 | search_space_len -= chunk_size; | |
2475 | else | |
2476 | search_space_len = 0; | |
2477 | ||
2478 | if (search_space_len >= pattern_len) | |
2479 | { | |
2480 | unsigned keep_len = search_buf_size - chunk_size; | |
8a35fb51 | 2481 | CORE_ADDR read_addr = start_addr + chunk_size + keep_len; |
08388c79 DE |
2482 | int nr_to_read; |
2483 | ||
2484 | /* Copy the trailing part of the previous iteration to the front | |
2485 | of the buffer for the next iteration. */ | |
2486 | gdb_assert (keep_len == pattern_len - 1); | |
2487 | memcpy (search_buf, search_buf + chunk_size, keep_len); | |
2488 | ||
2489 | nr_to_read = min (search_space_len - keep_len, chunk_size); | |
2490 | ||
2491 | if (target_read (ops, TARGET_OBJECT_MEMORY, NULL, | |
2492 | search_buf + keep_len, read_addr, | |
2493 | nr_to_read) != nr_to_read) | |
2494 | { | |
b3dc46ff | 2495 | warning (_("Unable to access %s bytes of target " |
9b20d036 | 2496 | "memory at %s, halting search."), |
b3dc46ff | 2497 | plongest (nr_to_read), |
08388c79 DE |
2498 | hex_string (read_addr)); |
2499 | do_cleanups (old_cleanups); | |
2500 | return -1; | |
2501 | } | |
2502 | ||
2503 | start_addr += chunk_size; | |
2504 | } | |
2505 | } | |
2506 | ||
2507 | /* Not found. */ | |
2508 | ||
2509 | do_cleanups (old_cleanups); | |
2510 | return 0; | |
2511 | } | |
2512 | ||
58a5184e TT |
2513 | /* Default implementation of memory-searching. */ |
2514 | ||
2515 | static int | |
2516 | default_search_memory (struct target_ops *self, | |
2517 | CORE_ADDR start_addr, ULONGEST search_space_len, | |
2518 | const gdb_byte *pattern, ULONGEST pattern_len, | |
2519 | CORE_ADDR *found_addrp) | |
2520 | { | |
2521 | /* Start over from the top of the target stack. */ | |
2522 | return simple_search_memory (current_target.beneath, | |
2523 | start_addr, search_space_len, | |
2524 | pattern, pattern_len, found_addrp); | |
2525 | } | |
2526 | ||
08388c79 DE |
2527 | /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the |
2528 | sequence of bytes in PATTERN with length PATTERN_LEN. | |
2529 | ||
2530 | The result is 1 if found, 0 if not found, and -1 if there was an error | |
2531 | requiring halting of the search (e.g. memory read error). | |
2532 | If the pattern is found the address is recorded in FOUND_ADDRP. */ | |
2533 | ||
2534 | int | |
2535 | target_search_memory (CORE_ADDR start_addr, ULONGEST search_space_len, | |
2536 | const gdb_byte *pattern, ULONGEST pattern_len, | |
2537 | CORE_ADDR *found_addrp) | |
2538 | { | |
a7068b60 TT |
2539 | return current_target.to_search_memory (¤t_target, start_addr, |
2540 | search_space_len, | |
2541 | pattern, pattern_len, found_addrp); | |
08388c79 DE |
2542 | } |
2543 | ||
8edfe269 DJ |
2544 | /* Look through the currently pushed targets. If none of them will |
2545 | be able to restart the currently running process, issue an error | |
2546 | message. */ | |
2547 | ||
2548 | void | |
2549 | target_require_runnable (void) | |
2550 | { | |
2551 | struct target_ops *t; | |
2552 | ||
2553 | for (t = target_stack; t != NULL; t = t->beneath) | |
2554 | { | |
2555 | /* If this target knows how to create a new program, then | |
2556 | assume we will still be able to after killing the current | |
2557 | one. Either killing and mourning will not pop T, or else | |
2558 | find_default_run_target will find it again. */ | |
2559 | if (t->to_create_inferior != NULL) | |
2560 | return; | |
2561 | ||
548740d6 | 2562 | /* Do not worry about targets at certain strata that can not |
8edfe269 DJ |
2563 | create inferiors. Assume they will be pushed again if |
2564 | necessary, and continue to the process_stratum. */ | |
85e747d2 | 2565 | if (t->to_stratum == thread_stratum |
548740d6 | 2566 | || t->to_stratum == record_stratum |
85e747d2 | 2567 | || t->to_stratum == arch_stratum) |
8edfe269 DJ |
2568 | continue; |
2569 | ||
3e43a32a MS |
2570 | error (_("The \"%s\" target does not support \"run\". " |
2571 | "Try \"help target\" or \"continue\"."), | |
8edfe269 DJ |
2572 | t->to_shortname); |
2573 | } | |
2574 | ||
2575 | /* This function is only called if the target is running. In that | |
2576 | case there should have been a process_stratum target and it | |
c378eb4e | 2577 | should either know how to create inferiors, or not... */ |
9b20d036 | 2578 | internal_error (__FILE__, __LINE__, _("No targets found")); |
8edfe269 DJ |
2579 | } |
2580 | ||
6a3cb8e8 PA |
2581 | /* Whether GDB is allowed to fall back to the default run target for |
2582 | "run", "attach", etc. when no target is connected yet. */ | |
2583 | static int auto_connect_native_target = 1; | |
2584 | ||
2585 | static void | |
2586 | show_auto_connect_native_target (struct ui_file *file, int from_tty, | |
2587 | struct cmd_list_element *c, const char *value) | |
2588 | { | |
2589 | fprintf_filtered (file, | |
2590 | _("Whether GDB may automatically connect to the " | |
2591 | "native target is %s.\n"), | |
2592 | value); | |
2593 | } | |
2594 | ||
c906108c SS |
2595 | /* Look through the list of possible targets for a target that can |
2596 | execute a run or attach command without any other data. This is | |
2597 | used to locate the default process stratum. | |
2598 | ||
5f667f2d PA |
2599 | If DO_MESG is not NULL, the result is always valid (error() is |
2600 | called for errors); else, return NULL on error. */ | |
c906108c SS |
2601 | |
2602 | static struct target_ops * | |
fba45db2 | 2603 | find_default_run_target (char *do_mesg) |
c906108c | 2604 | { |
c906108c | 2605 | struct target_ops *runable = NULL; |
c906108c | 2606 | |
6a3cb8e8 | 2607 | if (auto_connect_native_target) |
c906108c | 2608 | { |
89a1c21a | 2609 | struct target_ops *t; |
6a3cb8e8 | 2610 | int count = 0; |
89a1c21a | 2611 | int i; |
6a3cb8e8 | 2612 | |
89a1c21a | 2613 | for (i = 0; VEC_iterate (target_ops_p, target_structs, i, t); ++i) |
c906108c | 2614 | { |
89a1c21a | 2615 | if (t->to_can_run != delegate_can_run && target_can_run (t)) |
6a3cb8e8 | 2616 | { |
89a1c21a | 2617 | runable = t; |
6a3cb8e8 PA |
2618 | ++count; |
2619 | } | |
c906108c | 2620 | } |
6a3cb8e8 PA |
2621 | |
2622 | if (count != 1) | |
2623 | runable = NULL; | |
c906108c SS |
2624 | } |
2625 | ||
6a3cb8e8 | 2626 | if (runable == NULL) |
5f667f2d PA |
2627 | { |
2628 | if (do_mesg) | |
2629 | error (_("Don't know how to %s. Try \"help target\"."), do_mesg); | |
2630 | else | |
2631 | return NULL; | |
2632 | } | |
c906108c SS |
2633 | |
2634 | return runable; | |
2635 | } | |
2636 | ||
b3ccfe11 | 2637 | /* See target.h. */ |
c906108c | 2638 | |
b3ccfe11 TT |
2639 | struct target_ops * |
2640 | find_attach_target (void) | |
c906108c SS |
2641 | { |
2642 | struct target_ops *t; | |
2643 | ||
b3ccfe11 TT |
2644 | /* If a target on the current stack can attach, use it. */ |
2645 | for (t = current_target.beneath; t != NULL; t = t->beneath) | |
2646 | { | |
2647 | if (t->to_attach != NULL) | |
2648 | break; | |
2649 | } | |
c906108c | 2650 | |
b3ccfe11 TT |
2651 | /* Otherwise, use the default run target for attaching. */ |
2652 | if (t == NULL) | |
2653 | t = find_default_run_target ("attach"); | |
b84876c2 | 2654 | |
b3ccfe11 | 2655 | return t; |
b84876c2 PA |
2656 | } |
2657 | ||
b3ccfe11 | 2658 | /* See target.h. */ |
b84876c2 | 2659 | |
b3ccfe11 TT |
2660 | struct target_ops * |
2661 | find_run_target (void) | |
9908b566 VP |
2662 | { |
2663 | struct target_ops *t; | |
2664 | ||
b3ccfe11 TT |
2665 | /* If a target on the current stack can attach, use it. */ |
2666 | for (t = current_target.beneath; t != NULL; t = t->beneath) | |
2667 | { | |
2668 | if (t->to_create_inferior != NULL) | |
2669 | break; | |
2670 | } | |
5d502164 | 2671 | |
b3ccfe11 TT |
2672 | /* Otherwise, use the default run target. */ |
2673 | if (t == NULL) | |
2674 | t = find_default_run_target ("run"); | |
9908b566 | 2675 | |
b3ccfe11 | 2676 | return t; |
9908b566 VP |
2677 | } |
2678 | ||
145b16a9 UW |
2679 | /* Implement the "info proc" command. */ |
2680 | ||
451b7c33 | 2681 | int |
7bc112c1 | 2682 | target_info_proc (const char *args, enum info_proc_what what) |
145b16a9 UW |
2683 | { |
2684 | struct target_ops *t; | |
2685 | ||
2686 | /* If we're already connected to something that can get us OS | |
2687 | related data, use it. Otherwise, try using the native | |
2688 | target. */ | |
2689 | if (current_target.to_stratum >= process_stratum) | |
2690 | t = current_target.beneath; | |
2691 | else | |
2692 | t = find_default_run_target (NULL); | |
2693 | ||
2694 | for (; t != NULL; t = t->beneath) | |
2695 | { | |
2696 | if (t->to_info_proc != NULL) | |
2697 | { | |
2698 | t->to_info_proc (t, args, what); | |
2699 | ||
2700 | if (targetdebug) | |
2701 | fprintf_unfiltered (gdb_stdlog, | |
2702 | "target_info_proc (\"%s\", %d)\n", args, what); | |
2703 | ||
451b7c33 | 2704 | return 1; |
145b16a9 UW |
2705 | } |
2706 | } | |
2707 | ||
451b7c33 | 2708 | return 0; |
145b16a9 UW |
2709 | } |
2710 | ||
03583c20 | 2711 | static int |
2bfc0540 | 2712 | find_default_supports_disable_randomization (struct target_ops *self) |
03583c20 UW |
2713 | { |
2714 | struct target_ops *t; | |
2715 | ||
2716 | t = find_default_run_target (NULL); | |
2717 | if (t && t->to_supports_disable_randomization) | |
2bfc0540 | 2718 | return (t->to_supports_disable_randomization) (t); |
03583c20 UW |
2719 | return 0; |
2720 | } | |
2721 | ||
2722 | int | |
2723 | target_supports_disable_randomization (void) | |
2724 | { | |
2725 | struct target_ops *t; | |
2726 | ||
2727 | for (t = ¤t_target; t != NULL; t = t->beneath) | |
2728 | if (t->to_supports_disable_randomization) | |
2bfc0540 | 2729 | return t->to_supports_disable_randomization (t); |
03583c20 UW |
2730 | |
2731 | return 0; | |
2732 | } | |
9908b566 | 2733 | |
07e059b5 VP |
2734 | char * |
2735 | target_get_osdata (const char *type) | |
2736 | { | |
07e059b5 VP |
2737 | struct target_ops *t; |
2738 | ||
739ef7fb PA |
2739 | /* If we're already connected to something that can get us OS |
2740 | related data, use it. Otherwise, try using the native | |
2741 | target. */ | |
2742 | if (current_target.to_stratum >= process_stratum) | |
6d097e65 | 2743 | t = current_target.beneath; |
739ef7fb PA |
2744 | else |
2745 | t = find_default_run_target ("get OS data"); | |
07e059b5 VP |
2746 | |
2747 | if (!t) | |
2748 | return NULL; | |
2749 | ||
6d097e65 | 2750 | return target_read_stralloc (t, TARGET_OBJECT_OSDATA, type); |
07e059b5 VP |
2751 | } |
2752 | ||
8eaff7cd TT |
2753 | static struct address_space * |
2754 | default_thread_address_space (struct target_ops *self, ptid_t ptid) | |
6c95b8df PA |
2755 | { |
2756 | struct inferior *inf; | |
6c95b8df PA |
2757 | |
2758 | /* Fall-back to the "main" address space of the inferior. */ | |
c9657e70 | 2759 | inf = find_inferior_ptid (ptid); |
6c95b8df PA |
2760 | |
2761 | if (inf == NULL || inf->aspace == NULL) | |
3e43a32a | 2762 | internal_error (__FILE__, __LINE__, |
9b20d036 MS |
2763 | _("Can't determine the current " |
2764 | "address space of thread %s\n"), | |
6c95b8df PA |
2765 | target_pid_to_str (ptid)); |
2766 | ||
2767 | return inf->aspace; | |
2768 | } | |
2769 | ||
8eaff7cd TT |
2770 | /* Determine the current address space of thread PTID. */ |
2771 | ||
2772 | struct address_space * | |
2773 | target_thread_address_space (ptid_t ptid) | |
2774 | { | |
2775 | struct address_space *aspace; | |
2776 | ||
2777 | aspace = current_target.to_thread_address_space (¤t_target, ptid); | |
2778 | gdb_assert (aspace != NULL); | |
2779 | ||
8eaff7cd TT |
2780 | return aspace; |
2781 | } | |
2782 | ||
7313baad UW |
2783 | |
2784 | /* Target file operations. */ | |
2785 | ||
2786 | static struct target_ops * | |
2787 | default_fileio_target (void) | |
2788 | { | |
2789 | /* If we're already connected to something that can perform | |
2790 | file I/O, use it. Otherwise, try using the native target. */ | |
2791 | if (current_target.to_stratum >= process_stratum) | |
2792 | return current_target.beneath; | |
2793 | else | |
2794 | return find_default_run_target ("file I/O"); | |
2795 | } | |
2796 | ||
1c4b552b GB |
2797 | /* File handle for target file operations. */ |
2798 | ||
2799 | typedef struct | |
2800 | { | |
2801 | /* The target on which this file is open. */ | |
2802 | struct target_ops *t; | |
2803 | ||
2804 | /* The file descriptor on the target. */ | |
2805 | int fd; | |
2806 | } fileio_fh_t; | |
2807 | ||
2808 | DEF_VEC_O (fileio_fh_t); | |
2809 | ||
2810 | /* Vector of currently open file handles. The value returned by | |
2811 | target_fileio_open and passed as the FD argument to other | |
2812 | target_fileio_* functions is an index into this vector. This | |
2813 | vector's entries are never freed; instead, files are marked as | |
2814 | closed, and the handle becomes available for reuse. */ | |
2815 | static VEC (fileio_fh_t) *fileio_fhandles; | |
2816 | ||
2817 | /* Macro to check whether a fileio_fh_t represents a closed file. */ | |
2818 | #define is_closed_fileio_fh(fd) ((fd) < 0) | |
2819 | ||
2820 | /* Index into fileio_fhandles of the lowest handle that might be | |
2821 | closed. This permits handle reuse without searching the whole | |
2822 | list each time a new file is opened. */ | |
2823 | static int lowest_closed_fd; | |
2824 | ||
2825 | /* Acquire a target fileio file descriptor. */ | |
2826 | ||
2827 | static int | |
2828 | acquire_fileio_fd (struct target_ops *t, int fd) | |
2829 | { | |
870f88f7 | 2830 | fileio_fh_t *fh; |
1c4b552b GB |
2831 | |
2832 | gdb_assert (!is_closed_fileio_fh (fd)); | |
2833 | ||
2834 | /* Search for closed handles to reuse. */ | |
2835 | for (; | |
2836 | VEC_iterate (fileio_fh_t, fileio_fhandles, | |
2837 | lowest_closed_fd, fh); | |
2838 | lowest_closed_fd++) | |
2839 | if (is_closed_fileio_fh (fh->fd)) | |
2840 | break; | |
2841 | ||
2842 | /* Push a new handle if no closed handles were found. */ | |
2843 | if (lowest_closed_fd == VEC_length (fileio_fh_t, fileio_fhandles)) | |
2844 | fh = VEC_safe_push (fileio_fh_t, fileio_fhandles, NULL); | |
2845 | ||
2846 | /* Fill in the handle. */ | |
2847 | fh->t = t; | |
2848 | fh->fd = fd; | |
2849 | ||
2850 | /* Return its index, and start the next lookup at | |
2851 | the next index. */ | |
2852 | return lowest_closed_fd++; | |
2853 | } | |
2854 | ||
2855 | /* Release a target fileio file descriptor. */ | |
2856 | ||
2857 | static void | |
2858 | release_fileio_fd (int fd, fileio_fh_t *fh) | |
2859 | { | |
2860 | fh->fd = -1; | |
2861 | lowest_closed_fd = min (lowest_closed_fd, fd); | |
2862 | } | |
2863 | ||
2864 | /* Return a pointer to the fileio_fhandle_t corresponding to FD. */ | |
2865 | ||
2866 | #define fileio_fd_to_fh(fd) \ | |
2867 | VEC_index (fileio_fh_t, fileio_fhandles, (fd)) | |
2868 | ||
4313b8c0 GB |
2869 | /* Helper for target_fileio_open and |
2870 | target_fileio_open_warn_if_slow. */ | |
12e2a5fd | 2871 | |
4313b8c0 GB |
2872 | static int |
2873 | target_fileio_open_1 (struct inferior *inf, const char *filename, | |
2874 | int flags, int mode, int warn_if_slow, | |
2875 | int *target_errno) | |
7313baad UW |
2876 | { |
2877 | struct target_ops *t; | |
2878 | ||
2879 | for (t = default_fileio_target (); t != NULL; t = t->beneath) | |
2880 | { | |
2881 | if (t->to_fileio_open != NULL) | |
2882 | { | |
07c138c8 | 2883 | int fd = t->to_fileio_open (t, inf, filename, flags, mode, |
4313b8c0 | 2884 | warn_if_slow, target_errno); |
7313baad | 2885 | |
1c4b552b GB |
2886 | if (fd < 0) |
2887 | fd = -1; | |
2888 | else | |
2889 | fd = acquire_fileio_fd (t, fd); | |
2890 | ||
7313baad UW |
2891 | if (targetdebug) |
2892 | fprintf_unfiltered (gdb_stdlog, | |
4313b8c0 | 2893 | "target_fileio_open (%d,%s,0x%x,0%o,%d)" |
07c138c8 GB |
2894 | " = %d (%d)\n", |
2895 | inf == NULL ? 0 : inf->num, | |
7313baad | 2896 | filename, flags, mode, |
4313b8c0 GB |
2897 | warn_if_slow, fd, |
2898 | fd != -1 ? 0 : *target_errno); | |
7313baad UW |
2899 | return fd; |
2900 | } | |
2901 | } | |
2902 | ||
2903 | *target_errno = FILEIO_ENOSYS; | |
2904 | return -1; | |
2905 | } | |
2906 | ||
12e2a5fd GB |
2907 | /* See target.h. */ |
2908 | ||
4313b8c0 GB |
2909 | int |
2910 | target_fileio_open (struct inferior *inf, const char *filename, | |
2911 | int flags, int mode, int *target_errno) | |
2912 | { | |
2913 | return target_fileio_open_1 (inf, filename, flags, mode, 0, | |
2914 | target_errno); | |
2915 | } | |
2916 | ||
2917 | /* See target.h. */ | |
2918 | ||
2919 | int | |
2920 | target_fileio_open_warn_if_slow (struct inferior *inf, | |
2921 | const char *filename, | |
2922 | int flags, int mode, int *target_errno) | |
2923 | { | |
2924 | return target_fileio_open_1 (inf, filename, flags, mode, 1, | |
2925 | target_errno); | |
2926 | } | |
2927 | ||
2928 | /* See target.h. */ | |
2929 | ||
7313baad UW |
2930 | int |
2931 | target_fileio_pwrite (int fd, const gdb_byte *write_buf, int len, | |
2932 | ULONGEST offset, int *target_errno) | |
2933 | { | |
1c4b552b GB |
2934 | fileio_fh_t *fh = fileio_fd_to_fh (fd); |
2935 | int ret = -1; | |
7313baad | 2936 | |
1c4b552b GB |
2937 | if (is_closed_fileio_fh (fh->fd)) |
2938 | *target_errno = EBADF; | |
2939 | else | |
2940 | ret = fh->t->to_fileio_pwrite (fh->t, fh->fd, write_buf, | |
2941 | len, offset, target_errno); | |
7313baad | 2942 | |
1c4b552b GB |
2943 | if (targetdebug) |
2944 | fprintf_unfiltered (gdb_stdlog, | |
2945 | "target_fileio_pwrite (%d,...,%d,%s) " | |
2946 | "= %d (%d)\n", | |
2947 | fd, len, pulongest (offset), | |
2948 | ret, ret != -1 ? 0 : *target_errno); | |
2949 | return ret; | |
7313baad UW |
2950 | } |
2951 | ||
12e2a5fd GB |
2952 | /* See target.h. */ |
2953 | ||
7313baad UW |
2954 | int |
2955 | target_fileio_pread (int fd, gdb_byte *read_buf, int len, | |
2956 | ULONGEST offset, int *target_errno) | |
2957 | { | |
1c4b552b GB |
2958 | fileio_fh_t *fh = fileio_fd_to_fh (fd); |
2959 | int ret = -1; | |
7313baad | 2960 | |
1c4b552b GB |
2961 | if (is_closed_fileio_fh (fh->fd)) |
2962 | *target_errno = EBADF; | |
2963 | else | |
2964 | ret = fh->t->to_fileio_pread (fh->t, fh->fd, read_buf, | |
2965 | len, offset, target_errno); | |
7313baad | 2966 | |
1c4b552b GB |
2967 | if (targetdebug) |
2968 | fprintf_unfiltered (gdb_stdlog, | |
2969 | "target_fileio_pread (%d,...,%d,%s) " | |
2970 | "= %d (%d)\n", | |
2971 | fd, len, pulongest (offset), | |
2972 | ret, ret != -1 ? 0 : *target_errno); | |
9b15c1f0 GB |
2973 | return ret; |
2974 | } | |
2975 | ||
2976 | /* See target.h. */ | |
12e2a5fd | 2977 | |
9b15c1f0 GB |
2978 | int |
2979 | target_fileio_fstat (int fd, struct stat *sb, int *target_errno) | |
2980 | { | |
2981 | fileio_fh_t *fh = fileio_fd_to_fh (fd); | |
2982 | int ret = -1; | |
2983 | ||
2984 | if (is_closed_fileio_fh (fh->fd)) | |
2985 | *target_errno = EBADF; | |
2986 | else | |
2987 | ret = fh->t->to_fileio_fstat (fh->t, fh->fd, sb, target_errno); | |
2988 | ||
2989 | if (targetdebug) | |
2990 | fprintf_unfiltered (gdb_stdlog, | |
2991 | "target_fileio_fstat (%d) = %d (%d)\n", | |
2992 | fd, ret, ret != -1 ? 0 : *target_errno); | |
1c4b552b | 2993 | return ret; |
7313baad UW |
2994 | } |
2995 | ||
12e2a5fd GB |
2996 | /* See target.h. */ |
2997 | ||
7313baad UW |
2998 | int |
2999 | target_fileio_close (int fd, int *target_errno) | |
3000 | { | |
1c4b552b GB |
3001 | fileio_fh_t *fh = fileio_fd_to_fh (fd); |
3002 | int ret = -1; | |
7313baad | 3003 | |
1c4b552b GB |
3004 | if (is_closed_fileio_fh (fh->fd)) |
3005 | *target_errno = EBADF; | |
3006 | else | |
7313baad | 3007 | { |
1c4b552b GB |
3008 | ret = fh->t->to_fileio_close (fh->t, fh->fd, target_errno); |
3009 | release_fileio_fd (fd, fh); | |
7313baad UW |
3010 | } |
3011 | ||
1c4b552b GB |
3012 | if (targetdebug) |
3013 | fprintf_unfiltered (gdb_stdlog, | |
3014 | "target_fileio_close (%d) = %d (%d)\n", | |
3015 | fd, ret, ret != -1 ? 0 : *target_errno); | |
3016 | return ret; | |
7313baad UW |
3017 | } |
3018 | ||
12e2a5fd GB |
3019 | /* See target.h. */ |
3020 | ||
7313baad | 3021 | int |
07c138c8 GB |
3022 | target_fileio_unlink (struct inferior *inf, const char *filename, |
3023 | int *target_errno) | |
7313baad UW |
3024 | { |
3025 | struct target_ops *t; | |
3026 | ||
3027 | for (t = default_fileio_target (); t != NULL; t = t->beneath) | |
3028 | { | |
3029 | if (t->to_fileio_unlink != NULL) | |
3030 | { | |
07c138c8 GB |
3031 | int ret = t->to_fileio_unlink (t, inf, filename, |
3032 | target_errno); | |
7313baad UW |
3033 | |
3034 | if (targetdebug) | |
3035 | fprintf_unfiltered (gdb_stdlog, | |
07c138c8 GB |
3036 | "target_fileio_unlink (%d,%s)" |
3037 | " = %d (%d)\n", | |
3038 | inf == NULL ? 0 : inf->num, filename, | |
3039 | ret, ret != -1 ? 0 : *target_errno); | |
7313baad UW |
3040 | return ret; |
3041 | } | |
3042 | } | |
3043 | ||
3044 | *target_errno = FILEIO_ENOSYS; | |
3045 | return -1; | |
3046 | } | |
3047 | ||
12e2a5fd GB |
3048 | /* See target.h. */ |
3049 | ||
b9e7b9c3 | 3050 | char * |
07c138c8 GB |
3051 | target_fileio_readlink (struct inferior *inf, const char *filename, |
3052 | int *target_errno) | |
b9e7b9c3 UW |
3053 | { |
3054 | struct target_ops *t; | |
3055 | ||
3056 | for (t = default_fileio_target (); t != NULL; t = t->beneath) | |
3057 | { | |
3058 | if (t->to_fileio_readlink != NULL) | |
3059 | { | |
07c138c8 GB |
3060 | char *ret = t->to_fileio_readlink (t, inf, filename, |
3061 | target_errno); | |
b9e7b9c3 UW |
3062 | |
3063 | if (targetdebug) | |
3064 | fprintf_unfiltered (gdb_stdlog, | |
07c138c8 GB |
3065 | "target_fileio_readlink (%d,%s)" |
3066 | " = %s (%d)\n", | |
3067 | inf == NULL ? 0 : inf->num, | |
b9e7b9c3 UW |
3068 | filename, ret? ret : "(nil)", |
3069 | ret? 0 : *target_errno); | |
3070 | return ret; | |
3071 | } | |
3072 | } | |
3073 | ||
3074 | *target_errno = FILEIO_ENOSYS; | |
3075 | return NULL; | |
3076 | } | |
3077 | ||
7313baad UW |
3078 | static void |
3079 | target_fileio_close_cleanup (void *opaque) | |
3080 | { | |
3081 | int fd = *(int *) opaque; | |
3082 | int target_errno; | |
3083 | ||
3084 | target_fileio_close (fd, &target_errno); | |
3085 | } | |
3086 | ||
07c138c8 GB |
3087 | /* Read target file FILENAME, in the filesystem as seen by INF. If |
3088 | INF is NULL, use the filesystem seen by the debugger (GDB or, for | |
3089 | remote targets, the remote stub). Store the result in *BUF_P and | |
3090 | return the size of the transferred data. PADDING additional bytes | |
3091 | are available in *BUF_P. This is a helper function for | |
3092 | target_fileio_read_alloc; see the declaration of that function for | |
3093 | more information. */ | |
7313baad | 3094 | |
f7af1fcd JK |
3095 | static LONGEST |
3096 | target_fileio_read_alloc_1 (struct inferior *inf, const char *filename, | |
3097 | gdb_byte **buf_p, int padding) | |
3098 | { | |
3099 | struct cleanup *close_cleanup; | |
db1ff28b JK |
3100 | size_t buf_alloc, buf_pos; |
3101 | gdb_byte *buf; | |
3102 | LONGEST n; | |
3103 | int fd; | |
3104 | int target_errno; | |
f7af1fcd | 3105 | |
db1ff28b JK |
3106 | fd = target_fileio_open (inf, filename, FILEIO_O_RDONLY, 0700, |
3107 | &target_errno); | |
f7af1fcd JK |
3108 | if (fd == -1) |
3109 | return -1; | |
3110 | ||
3111 | close_cleanup = make_cleanup (target_fileio_close_cleanup, &fd); | |
db1ff28b JK |
3112 | |
3113 | /* Start by reading up to 4K at a time. The target will throttle | |
3114 | this number down if necessary. */ | |
3115 | buf_alloc = 4096; | |
224c3ddb | 3116 | buf = (gdb_byte *) xmalloc (buf_alloc); |
db1ff28b JK |
3117 | buf_pos = 0; |
3118 | while (1) | |
3119 | { | |
3120 | n = target_fileio_pread (fd, &buf[buf_pos], | |
3121 | buf_alloc - buf_pos - padding, buf_pos, | |
3122 | &target_errno); | |
3123 | if (n < 0) | |
3124 | { | |
3125 | /* An error occurred. */ | |
3126 | do_cleanups (close_cleanup); | |
3127 | xfree (buf); | |
3128 | return -1; | |
3129 | } | |
3130 | else if (n == 0) | |
3131 | { | |
3132 | /* Read all there was. */ | |
3133 | do_cleanups (close_cleanup); | |
3134 | if (buf_pos == 0) | |
3135 | xfree (buf); | |
3136 | else | |
3137 | *buf_p = buf; | |
3138 | return buf_pos; | |
3139 | } | |
3140 | ||
3141 | buf_pos += n; | |
3142 | ||
3143 | /* If the buffer is filling up, expand it. */ | |
3144 | if (buf_alloc < buf_pos * 2) | |
3145 | { | |
3146 | buf_alloc *= 2; | |
224c3ddb | 3147 | buf = (gdb_byte *) xrealloc (buf, buf_alloc); |
db1ff28b JK |
3148 | } |
3149 | ||
3150 | QUIT; | |
3151 | } | |
f7af1fcd JK |
3152 | } |
3153 | ||
12e2a5fd | 3154 | /* See target.h. */ |
7313baad UW |
3155 | |
3156 | LONGEST | |
07c138c8 GB |
3157 | target_fileio_read_alloc (struct inferior *inf, const char *filename, |
3158 | gdb_byte **buf_p) | |
7313baad | 3159 | { |
07c138c8 | 3160 | return target_fileio_read_alloc_1 (inf, filename, buf_p, 0); |
7313baad UW |
3161 | } |
3162 | ||
db1ff28b | 3163 | /* See target.h. */ |
f7af1fcd JK |
3164 | |
3165 | char * | |
3166 | target_fileio_read_stralloc (struct inferior *inf, const char *filename) | |
3167 | { | |
db1ff28b JK |
3168 | gdb_byte *buffer; |
3169 | char *bufstr; | |
3170 | LONGEST i, transferred; | |
3171 | ||
3172 | transferred = target_fileio_read_alloc_1 (inf, filename, &buffer, 1); | |
3173 | bufstr = (char *) buffer; | |
3174 | ||
3175 | if (transferred < 0) | |
3176 | return NULL; | |
3177 | ||
3178 | if (transferred == 0) | |
3179 | return xstrdup (""); | |
3180 | ||
3181 | bufstr[transferred] = 0; | |
3182 | ||
3183 | /* Check for embedded NUL bytes; but allow trailing NULs. */ | |
3184 | for (i = strlen (bufstr); i < transferred; i++) | |
3185 | if (bufstr[i] != 0) | |
3186 | { | |
3187 | warning (_("target file %s " | |
3188 | "contained unexpected null characters"), | |
3189 | filename); | |
3190 | break; | |
3191 | } | |
3192 | ||
3193 | return bufstr; | |
f7af1fcd | 3194 | } |
7313baad | 3195 | |
db1ff28b | 3196 | |
e0d24f8d | 3197 | static int |
31568a15 TT |
3198 | default_region_ok_for_hw_watchpoint (struct target_ops *self, |
3199 | CORE_ADDR addr, int len) | |
e0d24f8d | 3200 | { |
f5656ead | 3201 | return (len <= gdbarch_ptr_bit (target_gdbarch ()) / TARGET_CHAR_BIT); |
ccaa32c7 GS |
3202 | } |
3203 | ||
5009afc5 AS |
3204 | static int |
3205 | default_watchpoint_addr_within_range (struct target_ops *target, | |
3206 | CORE_ADDR addr, | |
3207 | CORE_ADDR start, int length) | |
3208 | { | |
3209 | return addr >= start && addr < start + length; | |
3210 | } | |
3211 | ||
c2250ad1 UW |
3212 | static struct gdbarch * |
3213 | default_thread_architecture (struct target_ops *ops, ptid_t ptid) | |
3214 | { | |
f5656ead | 3215 | return target_gdbarch (); |
c2250ad1 UW |
3216 | } |
3217 | ||
c906108c | 3218 | static int |
555bbdeb TT |
3219 | return_zero (struct target_ops *ignore) |
3220 | { | |
3221 | return 0; | |
3222 | } | |
3223 | ||
3224 | static int | |
3225 | return_zero_has_execution (struct target_ops *ignore, ptid_t ignore2) | |
c906108c SS |
3226 | { |
3227 | return 0; | |
3228 | } | |
3229 | ||
ed9a39eb JM |
3230 | /* |
3231 | * Find the next target down the stack from the specified target. | |
3232 | */ | |
3233 | ||
3234 | struct target_ops * | |
fba45db2 | 3235 | find_target_beneath (struct target_ops *t) |
ed9a39eb | 3236 | { |
258b763a | 3237 | return t->beneath; |
ed9a39eb JM |
3238 | } |
3239 | ||
8b06beed TT |
3240 | /* See target.h. */ |
3241 | ||
3242 | struct target_ops * | |
3243 | find_target_at (enum strata stratum) | |
3244 | { | |
3245 | struct target_ops *t; | |
3246 | ||
3247 | for (t = current_target.beneath; t != NULL; t = t->beneath) | |
3248 | if (t->to_stratum == stratum) | |
3249 | return t; | |
3250 | ||
3251 | return NULL; | |
3252 | } | |
3253 | ||
c906108c | 3254 | \f |
0f48b757 PA |
3255 | |
3256 | /* See target.h */ | |
3257 | ||
3258 | void | |
3259 | target_announce_detach (int from_tty) | |
3260 | { | |
3261 | pid_t pid; | |
3262 | char *exec_file; | |
3263 | ||
3264 | if (!from_tty) | |
3265 | return; | |
3266 | ||
3267 | exec_file = get_exec_file (0); | |
3268 | if (exec_file == NULL) | |
3269 | exec_file = ""; | |
3270 | ||
3271 | pid = ptid_get_pid (inferior_ptid); | |
3272 | printf_unfiltered (_("Detaching from program: %s, %s\n"), exec_file, | |
3273 | target_pid_to_str (pid_to_ptid (pid))); | |
3274 | gdb_flush (gdb_stdout); | |
3275 | } | |
3276 | ||
c906108c SS |
3277 | /* The inferior process has died. Long live the inferior! */ |
3278 | ||
3279 | void | |
fba45db2 | 3280 | generic_mourn_inferior (void) |
c906108c | 3281 | { |
7f9f62ba | 3282 | ptid_t ptid; |
c906108c | 3283 | |
7f9f62ba | 3284 | ptid = inferior_ptid; |
39f77062 | 3285 | inferior_ptid = null_ptid; |
7f9f62ba | 3286 | |
f59f708a PA |
3287 | /* Mark breakpoints uninserted in case something tries to delete a |
3288 | breakpoint while we delete the inferior's threads (which would | |
3289 | fail, since the inferior is long gone). */ | |
3290 | mark_breakpoints_out (); | |
3291 | ||
7f9f62ba PA |
3292 | if (!ptid_equal (ptid, null_ptid)) |
3293 | { | |
3294 | int pid = ptid_get_pid (ptid); | |
6c95b8df | 3295 | exit_inferior (pid); |
7f9f62ba PA |
3296 | } |
3297 | ||
f59f708a PA |
3298 | /* Note this wipes step-resume breakpoints, so needs to be done |
3299 | after exit_inferior, which ends up referencing the step-resume | |
3300 | breakpoints through clear_thread_inferior_resources. */ | |
c906108c | 3301 | breakpoint_init_inferior (inf_exited); |
f59f708a | 3302 | |
c906108c SS |
3303 | registers_changed (); |
3304 | ||
c906108c SS |
3305 | reopen_exec_file (); |
3306 | reinit_frame_cache (); | |
3307 | ||
9a4105ab AC |
3308 | if (deprecated_detach_hook) |
3309 | deprecated_detach_hook (); | |
c906108c SS |
3310 | } |
3311 | \f | |
fd0a2a6f MK |
3312 | /* Convert a normal process ID to a string. Returns the string in a |
3313 | static buffer. */ | |
c906108c SS |
3314 | |
3315 | char * | |
39f77062 | 3316 | normal_pid_to_str (ptid_t ptid) |
c906108c | 3317 | { |
fd0a2a6f | 3318 | static char buf[32]; |
c906108c | 3319 | |
5fff8fc0 | 3320 | xsnprintf (buf, sizeof buf, "process %d", ptid_get_pid (ptid)); |
c906108c SS |
3321 | return buf; |
3322 | } | |
3323 | ||
2c0b251b | 3324 | static char * |
770234d3 | 3325 | default_pid_to_str (struct target_ops *ops, ptid_t ptid) |
117de6a9 PA |
3326 | { |
3327 | return normal_pid_to_str (ptid); | |
3328 | } | |
3329 | ||
9b4eba8e HZ |
3330 | /* Error-catcher for target_find_memory_regions. */ |
3331 | static int | |
2e73927c TT |
3332 | dummy_find_memory_regions (struct target_ops *self, |
3333 | find_memory_region_ftype ignore1, void *ignore2) | |
be4d1333 | 3334 | { |
9b4eba8e | 3335 | error (_("Command not implemented for this target.")); |
be4d1333 MS |
3336 | return 0; |
3337 | } | |
3338 | ||
9b4eba8e HZ |
3339 | /* Error-catcher for target_make_corefile_notes. */ |
3340 | static char * | |
fc6691b2 TT |
3341 | dummy_make_corefile_notes (struct target_ops *self, |
3342 | bfd *ignore1, int *ignore2) | |
be4d1333 | 3343 | { |
9b4eba8e | 3344 | error (_("Command not implemented for this target.")); |
be4d1333 MS |
3345 | return NULL; |
3346 | } | |
3347 | ||
c906108c SS |
3348 | /* Set up the handful of non-empty slots needed by the dummy target |
3349 | vector. */ | |
3350 | ||
3351 | static void | |
fba45db2 | 3352 | init_dummy_target (void) |
c906108c SS |
3353 | { |
3354 | dummy_target.to_shortname = "None"; | |
3355 | dummy_target.to_longname = "None"; | |
3356 | dummy_target.to_doc = ""; | |
03583c20 UW |
3357 | dummy_target.to_supports_disable_randomization |
3358 | = find_default_supports_disable_randomization; | |
c906108c | 3359 | dummy_target.to_stratum = dummy_stratum; |
555bbdeb TT |
3360 | dummy_target.to_has_all_memory = return_zero; |
3361 | dummy_target.to_has_memory = return_zero; | |
3362 | dummy_target.to_has_stack = return_zero; | |
3363 | dummy_target.to_has_registers = return_zero; | |
3364 | dummy_target.to_has_execution = return_zero_has_execution; | |
c906108c | 3365 | dummy_target.to_magic = OPS_MAGIC; |
1101cb7b TT |
3366 | |
3367 | install_dummy_methods (&dummy_target); | |
c906108c | 3368 | } |
c906108c | 3369 | \f |
c906108c | 3370 | |
f1c07ab0 | 3371 | void |
460014f5 | 3372 | target_close (struct target_ops *targ) |
f1c07ab0 | 3373 | { |
7fdc1521 TT |
3374 | gdb_assert (!target_is_pushed (targ)); |
3375 | ||
f1c07ab0 | 3376 | if (targ->to_xclose != NULL) |
460014f5 | 3377 | targ->to_xclose (targ); |
f1c07ab0 | 3378 | else if (targ->to_close != NULL) |
de90e03d | 3379 | targ->to_close (targ); |
947b8855 PA |
3380 | |
3381 | if (targetdebug) | |
460014f5 | 3382 | fprintf_unfiltered (gdb_stdlog, "target_close ()\n"); |
f1c07ab0 AC |
3383 | } |
3384 | ||
28439f5e PA |
3385 | int |
3386 | target_thread_alive (ptid_t ptid) | |
c906108c | 3387 | { |
a7068b60 | 3388 | return current_target.to_thread_alive (¤t_target, ptid); |
28439f5e PA |
3389 | } |
3390 | ||
3391 | void | |
e8032dde | 3392 | target_update_thread_list (void) |
28439f5e | 3393 | { |
e8032dde | 3394 | current_target.to_update_thread_list (¤t_target); |
c906108c SS |
3395 | } |
3396 | ||
d914c394 SS |
3397 | void |
3398 | target_stop (ptid_t ptid) | |
3399 | { | |
3400 | if (!may_stop) | |
3401 | { | |
3402 | warning (_("May not interrupt or stop the target, ignoring attempt")); | |
3403 | return; | |
3404 | } | |
3405 | ||
1eab8a48 | 3406 | (*current_target.to_stop) (¤t_target, ptid); |
d914c394 SS |
3407 | } |
3408 | ||
bfedc46a PA |
3409 | void |
3410 | target_interrupt (ptid_t ptid) | |
3411 | { | |
3412 | if (!may_stop) | |
3413 | { | |
3414 | warning (_("May not interrupt or stop the target, ignoring attempt")); | |
3415 | return; | |
3416 | } | |
3417 | ||
3418 | (*current_target.to_interrupt) (¤t_target, ptid); | |
3419 | } | |
3420 | ||
abc56d60 PA |
3421 | /* See target.h. */ |
3422 | ||
93692b58 PA |
3423 | void |
3424 | target_pass_ctrlc (void) | |
3425 | { | |
3426 | (*current_target.to_pass_ctrlc) (¤t_target); | |
3427 | } | |
3428 | ||
3429 | /* See target.h. */ | |
3430 | ||
3431 | void | |
3432 | default_target_pass_ctrlc (struct target_ops *ops) | |
3433 | { | |
3434 | target_interrupt (inferior_ptid); | |
3435 | } | |
3436 | ||
f8c1d06b GB |
3437 | /* See target/target.h. */ |
3438 | ||
3439 | void | |
03f4463b | 3440 | target_stop_and_wait (ptid_t ptid) |
f8c1d06b GB |
3441 | { |
3442 | struct target_waitstatus status; | |
3443 | int was_non_stop = non_stop; | |
3444 | ||
3445 | non_stop = 1; | |
3446 | target_stop (ptid); | |
3447 | ||
3448 | memset (&status, 0, sizeof (status)); | |
3449 | target_wait (ptid, &status, 0); | |
3450 | ||
3451 | non_stop = was_non_stop; | |
3452 | } | |
3453 | ||
3454 | /* See target/target.h. */ | |
3455 | ||
3456 | void | |
03f4463b | 3457 | target_continue_no_signal (ptid_t ptid) |
f8c1d06b GB |
3458 | { |
3459 | target_resume (ptid, 0, GDB_SIGNAL_0); | |
3460 | } | |
3461 | ||
09826ec5 PA |
3462 | /* Concatenate ELEM to LIST, a comma separate list, and return the |
3463 | result. The LIST incoming argument is released. */ | |
3464 | ||
3465 | static char * | |
3466 | str_comma_list_concat_elem (char *list, const char *elem) | |
3467 | { | |
3468 | if (list == NULL) | |
3469 | return xstrdup (elem); | |
3470 | else | |
3471 | return reconcat (list, list, ", ", elem, (char *) NULL); | |
3472 | } | |
3473 | ||
3474 | /* Helper for target_options_to_string. If OPT is present in | |
3475 | TARGET_OPTIONS, append the OPT_STR (string version of OPT) in RET. | |
3476 | Returns the new resulting string. OPT is removed from | |
3477 | TARGET_OPTIONS. */ | |
3478 | ||
3479 | static char * | |
3480 | do_option (int *target_options, char *ret, | |
3481 | int opt, char *opt_str) | |
3482 | { | |
3483 | if ((*target_options & opt) != 0) | |
3484 | { | |
3485 | ret = str_comma_list_concat_elem (ret, opt_str); | |
3486 | *target_options &= ~opt; | |
3487 | } | |
3488 | ||
3489 | return ret; | |
3490 | } | |
3491 | ||
3492 | char * | |
3493 | target_options_to_string (int target_options) | |
3494 | { | |
3495 | char *ret = NULL; | |
3496 | ||
3497 | #define DO_TARG_OPTION(OPT) \ | |
3498 | ret = do_option (&target_options, ret, OPT, #OPT) | |
3499 | ||
3500 | DO_TARG_OPTION (TARGET_WNOHANG); | |
3501 | ||
3502 | if (target_options != 0) | |
3503 | ret = str_comma_list_concat_elem (ret, "unknown???"); | |
3504 | ||
3505 | if (ret == NULL) | |
3506 | ret = xstrdup (""); | |
3507 | return ret; | |
3508 | } | |
3509 | ||
bf0c5130 | 3510 | static void |
56be3814 UW |
3511 | debug_print_register (const char * func, |
3512 | struct regcache *regcache, int regno) | |
bf0c5130 | 3513 | { |
f8d29908 | 3514 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
5d502164 | 3515 | |
bf0c5130 | 3516 | fprintf_unfiltered (gdb_stdlog, "%s ", func); |
f8d29908 | 3517 | if (regno >= 0 && regno < gdbarch_num_regs (gdbarch) |
f8d29908 UW |
3518 | && gdbarch_register_name (gdbarch, regno) != NULL |
3519 | && gdbarch_register_name (gdbarch, regno)[0] != '\0') | |
3520 | fprintf_unfiltered (gdb_stdlog, "(%s)", | |
3521 | gdbarch_register_name (gdbarch, regno)); | |
bf0c5130 AC |
3522 | else |
3523 | fprintf_unfiltered (gdb_stdlog, "(%d)", regno); | |
0ff58721 | 3524 | if (regno >= 0 && regno < gdbarch_num_regs (gdbarch)) |
bf0c5130 | 3525 | { |
e17a4113 | 3526 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
f8d29908 | 3527 | int i, size = register_size (gdbarch, regno); |
e362b510 | 3528 | gdb_byte buf[MAX_REGISTER_SIZE]; |
5d502164 | 3529 | |
0ff58721 | 3530 | regcache_raw_collect (regcache, regno, buf); |
bf0c5130 | 3531 | fprintf_unfiltered (gdb_stdlog, " = "); |
81c4a259 | 3532 | for (i = 0; i < size; i++) |
bf0c5130 AC |
3533 | { |
3534 | fprintf_unfiltered (gdb_stdlog, "%02x", buf[i]); | |
3535 | } | |
81c4a259 | 3536 | if (size <= sizeof (LONGEST)) |
bf0c5130 | 3537 | { |
e17a4113 | 3538 | ULONGEST val = extract_unsigned_integer (buf, size, byte_order); |
5d502164 | 3539 | |
0b1553bc UW |
3540 | fprintf_unfiltered (gdb_stdlog, " %s %s", |
3541 | core_addr_to_string_nz (val), plongest (val)); | |
bf0c5130 AC |
3542 | } |
3543 | } | |
3544 | fprintf_unfiltered (gdb_stdlog, "\n"); | |
3545 | } | |
3546 | ||
28439f5e PA |
3547 | void |
3548 | target_fetch_registers (struct regcache *regcache, int regno) | |
c906108c | 3549 | { |
ad5989bd TT |
3550 | current_target.to_fetch_registers (¤t_target, regcache, regno); |
3551 | if (targetdebug) | |
3552 | debug_print_register ("target_fetch_registers", regcache, regno); | |
c906108c SS |
3553 | } |
3554 | ||
28439f5e PA |
3555 | void |
3556 | target_store_registers (struct regcache *regcache, int regno) | |
c906108c | 3557 | { |
d914c394 SS |
3558 | if (!may_write_registers) |
3559 | error (_("Writing to registers is not allowed (regno %d)"), regno); | |
3560 | ||
6b84065d TT |
3561 | current_target.to_store_registers (¤t_target, regcache, regno); |
3562 | if (targetdebug) | |
28439f5e | 3563 | { |
6b84065d | 3564 | debug_print_register ("target_store_registers", regcache, regno); |
28439f5e | 3565 | } |
c906108c SS |
3566 | } |
3567 | ||
dc146f7c VP |
3568 | int |
3569 | target_core_of_thread (ptid_t ptid) | |
3570 | { | |
a7068b60 | 3571 | return current_target.to_core_of_thread (¤t_target, ptid); |
dc146f7c VP |
3572 | } |
3573 | ||
936d2992 PA |
3574 | int |
3575 | simple_verify_memory (struct target_ops *ops, | |
3576 | const gdb_byte *data, CORE_ADDR lma, ULONGEST size) | |
3577 | { | |
3578 | LONGEST total_xfered = 0; | |
3579 | ||
3580 | while (total_xfered < size) | |
3581 | { | |
3582 | ULONGEST xfered_len; | |
3583 | enum target_xfer_status status; | |
3584 | gdb_byte buf[1024]; | |
3585 | ULONGEST howmuch = min (sizeof (buf), size - total_xfered); | |
3586 | ||
3587 | status = target_xfer_partial (ops, TARGET_OBJECT_MEMORY, NULL, | |
3588 | buf, NULL, lma + total_xfered, howmuch, | |
3589 | &xfered_len); | |
3590 | if (status == TARGET_XFER_OK | |
3591 | && memcmp (data + total_xfered, buf, xfered_len) == 0) | |
3592 | { | |
3593 | total_xfered += xfered_len; | |
3594 | QUIT; | |
3595 | } | |
3596 | else | |
3597 | return 0; | |
3598 | } | |
3599 | return 1; | |
3600 | } | |
3601 | ||
3602 | /* Default implementation of memory verification. */ | |
3603 | ||
3604 | static int | |
3605 | default_verify_memory (struct target_ops *self, | |
3606 | const gdb_byte *data, CORE_ADDR memaddr, ULONGEST size) | |
3607 | { | |
3608 | /* Start over from the top of the target stack. */ | |
3609 | return simple_verify_memory (current_target.beneath, | |
3610 | data, memaddr, size); | |
3611 | } | |
3612 | ||
4a5e7a5b PA |
3613 | int |
3614 | target_verify_memory (const gdb_byte *data, CORE_ADDR memaddr, ULONGEST size) | |
3615 | { | |
a7068b60 TT |
3616 | return current_target.to_verify_memory (¤t_target, |
3617 | data, memaddr, size); | |
4a5e7a5b PA |
3618 | } |
3619 | ||
9c06b0b4 TJB |
3620 | /* The documentation for this function is in its prototype declaration in |
3621 | target.h. */ | |
3622 | ||
3623 | int | |
f4b0a671 SM |
3624 | target_insert_mask_watchpoint (CORE_ADDR addr, CORE_ADDR mask, |
3625 | enum target_hw_bp_type rw) | |
9c06b0b4 | 3626 | { |
a7068b60 TT |
3627 | return current_target.to_insert_mask_watchpoint (¤t_target, |
3628 | addr, mask, rw); | |
9c06b0b4 TJB |
3629 | } |
3630 | ||
3631 | /* The documentation for this function is in its prototype declaration in | |
3632 | target.h. */ | |
3633 | ||
3634 | int | |
f4b0a671 SM |
3635 | target_remove_mask_watchpoint (CORE_ADDR addr, CORE_ADDR mask, |
3636 | enum target_hw_bp_type rw) | |
9c06b0b4 | 3637 | { |
a7068b60 TT |
3638 | return current_target.to_remove_mask_watchpoint (¤t_target, |
3639 | addr, mask, rw); | |
9c06b0b4 TJB |
3640 | } |
3641 | ||
3642 | /* The documentation for this function is in its prototype declaration | |
3643 | in target.h. */ | |
3644 | ||
3645 | int | |
3646 | target_masked_watch_num_registers (CORE_ADDR addr, CORE_ADDR mask) | |
3647 | { | |
6c7e5e5c TT |
3648 | return current_target.to_masked_watch_num_registers (¤t_target, |
3649 | addr, mask); | |
9c06b0b4 TJB |
3650 | } |
3651 | ||
f1310107 TJB |
3652 | /* The documentation for this function is in its prototype declaration |
3653 | in target.h. */ | |
3654 | ||
3655 | int | |
3656 | target_ranged_break_num_registers (void) | |
3657 | { | |
a134316b | 3658 | return current_target.to_ranged_break_num_registers (¤t_target); |
f1310107 TJB |
3659 | } |
3660 | ||
02d27625 MM |
3661 | /* See target.h. */ |
3662 | ||
043c3577 MM |
3663 | int |
3664 | target_supports_btrace (enum btrace_format format) | |
3665 | { | |
3666 | return current_target.to_supports_btrace (¤t_target, format); | |
3667 | } | |
3668 | ||
3669 | /* See target.h. */ | |
3670 | ||
02d27625 | 3671 | struct btrace_target_info * |
f4abbc16 | 3672 | target_enable_btrace (ptid_t ptid, const struct btrace_config *conf) |
02d27625 | 3673 | { |
f4abbc16 | 3674 | return current_target.to_enable_btrace (¤t_target, ptid, conf); |
02d27625 MM |
3675 | } |
3676 | ||
3677 | /* See target.h. */ | |
3678 | ||
3679 | void | |
3680 | target_disable_btrace (struct btrace_target_info *btinfo) | |
3681 | { | |
8dc292d3 | 3682 | current_target.to_disable_btrace (¤t_target, btinfo); |
02d27625 MM |
3683 | } |
3684 | ||
3685 | /* See target.h. */ | |
3686 | ||
3687 | void | |
3688 | target_teardown_btrace (struct btrace_target_info *btinfo) | |
3689 | { | |
9ace480d | 3690 | current_target.to_teardown_btrace (¤t_target, btinfo); |
02d27625 MM |
3691 | } |
3692 | ||
3693 | /* See target.h. */ | |
3694 | ||
969c39fb | 3695 | enum btrace_error |
734b0e4b | 3696 | target_read_btrace (struct btrace_data *btrace, |
969c39fb | 3697 | struct btrace_target_info *btinfo, |
02d27625 MM |
3698 | enum btrace_read_type type) |
3699 | { | |
eb5b20d4 | 3700 | return current_target.to_read_btrace (¤t_target, btrace, btinfo, type); |
02d27625 MM |
3701 | } |
3702 | ||
d02ed0bb MM |
3703 | /* See target.h. */ |
3704 | ||
f4abbc16 MM |
3705 | const struct btrace_config * |
3706 | target_btrace_conf (const struct btrace_target_info *btinfo) | |
3707 | { | |
3708 | return current_target.to_btrace_conf (¤t_target, btinfo); | |
3709 | } | |
3710 | ||
3711 | /* See target.h. */ | |
3712 | ||
7c1687a9 MM |
3713 | void |
3714 | target_stop_recording (void) | |
3715 | { | |
ee97f592 | 3716 | current_target.to_stop_recording (¤t_target); |
7c1687a9 MM |
3717 | } |
3718 | ||
3719 | /* See target.h. */ | |
3720 | ||
d02ed0bb | 3721 | void |
85e1311a | 3722 | target_save_record (const char *filename) |
d02ed0bb | 3723 | { |
f09e2107 | 3724 | current_target.to_save_record (¤t_target, filename); |
d02ed0bb MM |
3725 | } |
3726 | ||
3727 | /* See target.h. */ | |
3728 | ||
3729 | int | |
3730 | target_supports_delete_record (void) | |
3731 | { | |
3732 | struct target_ops *t; | |
3733 | ||
3734 | for (t = current_target.beneath; t != NULL; t = t->beneath) | |
b0ed115f TT |
3735 | if (t->to_delete_record != delegate_delete_record |
3736 | && t->to_delete_record != tdefault_delete_record) | |
d02ed0bb MM |
3737 | return 1; |
3738 | ||
3739 | return 0; | |
3740 | } | |
3741 | ||
3742 | /* See target.h. */ | |
3743 | ||
3744 | void | |
3745 | target_delete_record (void) | |
3746 | { | |
07366925 | 3747 | current_target.to_delete_record (¤t_target); |
d02ed0bb MM |
3748 | } |
3749 | ||
3750 | /* See target.h. */ | |
3751 | ||
3752 | int | |
a52eab48 | 3753 | target_record_is_replaying (ptid_t ptid) |
d02ed0bb | 3754 | { |
a52eab48 | 3755 | return current_target.to_record_is_replaying (¤t_target, ptid); |
d02ed0bb MM |
3756 | } |
3757 | ||
3758 | /* See target.h. */ | |
3759 | ||
7ff27e9b MM |
3760 | int |
3761 | target_record_will_replay (ptid_t ptid, int dir) | |
3762 | { | |
3763 | return current_target.to_record_will_replay (¤t_target, ptid, dir); | |
3764 | } | |
3765 | ||
3766 | /* See target.h. */ | |
3767 | ||
797094dd MM |
3768 | void |
3769 | target_record_stop_replaying (void) | |
3770 | { | |
3771 | current_target.to_record_stop_replaying (¤t_target); | |
3772 | } | |
3773 | ||
3774 | /* See target.h. */ | |
3775 | ||
d02ed0bb MM |
3776 | void |
3777 | target_goto_record_begin (void) | |
3778 | { | |
671e76cc | 3779 | current_target.to_goto_record_begin (¤t_target); |
d02ed0bb MM |
3780 | } |
3781 | ||
3782 | /* See target.h. */ | |
3783 | ||
3784 | void | |
3785 | target_goto_record_end (void) | |
3786 | { | |
e9179bb3 | 3787 | current_target.to_goto_record_end (¤t_target); |
d02ed0bb MM |
3788 | } |
3789 | ||
3790 | /* See target.h. */ | |
3791 | ||
3792 | void | |
3793 | target_goto_record (ULONGEST insn) | |
3794 | { | |
05969c84 | 3795 | current_target.to_goto_record (¤t_target, insn); |
d02ed0bb MM |
3796 | } |
3797 | ||
67c86d06 MM |
3798 | /* See target.h. */ |
3799 | ||
3800 | void | |
3801 | target_insn_history (int size, int flags) | |
3802 | { | |
3679abfa | 3803 | current_target.to_insn_history (¤t_target, size, flags); |
67c86d06 MM |
3804 | } |
3805 | ||
3806 | /* See target.h. */ | |
3807 | ||
3808 | void | |
3809 | target_insn_history_from (ULONGEST from, int size, int flags) | |
3810 | { | |
8444ab58 | 3811 | current_target.to_insn_history_from (¤t_target, from, size, flags); |
67c86d06 MM |
3812 | } |
3813 | ||
3814 | /* See target.h. */ | |
3815 | ||
3816 | void | |
3817 | target_insn_history_range (ULONGEST begin, ULONGEST end, int flags) | |
3818 | { | |
c29302cc | 3819 | current_target.to_insn_history_range (¤t_target, begin, end, flags); |
67c86d06 MM |
3820 | } |
3821 | ||
15984c13 MM |
3822 | /* See target.h. */ |
3823 | ||
3824 | void | |
3825 | target_call_history (int size, int flags) | |
3826 | { | |
170049d4 | 3827 | current_target.to_call_history (¤t_target, size, flags); |
15984c13 MM |
3828 | } |
3829 | ||
3830 | /* See target.h. */ | |
3831 | ||
3832 | void | |
3833 | target_call_history_from (ULONGEST begin, int size, int flags) | |
3834 | { | |
16fc27d6 | 3835 | current_target.to_call_history_from (¤t_target, begin, size, flags); |
15984c13 MM |
3836 | } |
3837 | ||
3838 | /* See target.h. */ | |
3839 | ||
3840 | void | |
3841 | target_call_history_range (ULONGEST begin, ULONGEST end, int flags) | |
3842 | { | |
115d9817 | 3843 | current_target.to_call_history_range (¤t_target, begin, end, flags); |
15984c13 MM |
3844 | } |
3845 | ||
ea001bdc MM |
3846 | /* See target.h. */ |
3847 | ||
3848 | const struct frame_unwind * | |
3849 | target_get_unwinder (void) | |
3850 | { | |
ac01945b | 3851 | return current_target.to_get_unwinder (¤t_target); |
ea001bdc MM |
3852 | } |
3853 | ||
3854 | /* See target.h. */ | |
3855 | ||
3856 | const struct frame_unwind * | |
3857 | target_get_tailcall_unwinder (void) | |
3858 | { | |
ac01945b | 3859 | return current_target.to_get_tailcall_unwinder (¤t_target); |
ea001bdc MM |
3860 | } |
3861 | ||
5fff78c4 MM |
3862 | /* See target.h. */ |
3863 | ||
3864 | void | |
3865 | target_prepare_to_generate_core (void) | |
3866 | { | |
3867 | current_target.to_prepare_to_generate_core (¤t_target); | |
3868 | } | |
3869 | ||
3870 | /* See target.h. */ | |
3871 | ||
3872 | void | |
3873 | target_done_generating_core (void) | |
3874 | { | |
3875 | current_target.to_done_generating_core (¤t_target); | |
3876 | } | |
3877 | ||
c906108c | 3878 | static void |
fba45db2 | 3879 | setup_target_debug (void) |
c906108c SS |
3880 | { |
3881 | memcpy (&debug_target, ¤t_target, sizeof debug_target); | |
3882 | ||
a7068b60 | 3883 | init_debug_target (¤t_target); |
c906108c | 3884 | } |
c906108c | 3885 | \f |
c5aa993b JM |
3886 | |
3887 | static char targ_desc[] = | |
3e43a32a MS |
3888 | "Names of targets and files being debugged.\nShows the entire \ |
3889 | stack of targets currently in use (including the exec-file,\n\ | |
c906108c SS |
3890 | core-file, and process, if any), as well as the symbol file name."; |
3891 | ||
a53f3625 | 3892 | static void |
a30bf1f1 TT |
3893 | default_rcmd (struct target_ops *self, const char *command, |
3894 | struct ui_file *output) | |
a53f3625 TT |
3895 | { |
3896 | error (_("\"monitor\" command not supported by this target.")); | |
3897 | } | |
3898 | ||
96baa820 JM |
3899 | static void |
3900 | do_monitor_command (char *cmd, | |
3901 | int from_tty) | |
3902 | { | |
96baa820 JM |
3903 | target_rcmd (cmd, gdb_stdtarg); |
3904 | } | |
3905 | ||
87680a14 JB |
3906 | /* Print the name of each layers of our target stack. */ |
3907 | ||
3908 | static void | |
3909 | maintenance_print_target_stack (char *cmd, int from_tty) | |
3910 | { | |
3911 | struct target_ops *t; | |
3912 | ||
3913 | printf_filtered (_("The current target stack is:\n")); | |
3914 | ||
3915 | for (t = target_stack; t != NULL; t = t->beneath) | |
3916 | { | |
3917 | printf_filtered (" - %s (%s)\n", t->to_shortname, t->to_longname); | |
3918 | } | |
3919 | } | |
3920 | ||
372316f1 PA |
3921 | /* See target.h. */ |
3922 | ||
3923 | void | |
3924 | target_async (int enable) | |
3925 | { | |
3926 | infrun_async (enable); | |
3927 | current_target.to_async (¤t_target, enable); | |
3928 | } | |
3929 | ||
65706a29 PA |
3930 | /* See target.h. */ |
3931 | ||
3932 | void | |
3933 | target_thread_events (int enable) | |
3934 | { | |
3935 | current_target.to_thread_events (¤t_target, enable); | |
3936 | } | |
3937 | ||
329ea579 PA |
3938 | /* Controls if targets can report that they can/are async. This is |
3939 | just for maintainers to use when debugging gdb. */ | |
3940 | int target_async_permitted = 1; | |
c6ebd6cf VP |
3941 | |
3942 | /* The set command writes to this variable. If the inferior is | |
b5419e49 | 3943 | executing, target_async_permitted is *not* updated. */ |
329ea579 | 3944 | static int target_async_permitted_1 = 1; |
c6ebd6cf VP |
3945 | |
3946 | static void | |
329ea579 PA |
3947 | maint_set_target_async_command (char *args, int from_tty, |
3948 | struct cmd_list_element *c) | |
c6ebd6cf | 3949 | { |
c35b1492 | 3950 | if (have_live_inferiors ()) |
c6ebd6cf VP |
3951 | { |
3952 | target_async_permitted_1 = target_async_permitted; | |
3953 | error (_("Cannot change this setting while the inferior is running.")); | |
3954 | } | |
3955 | ||
3956 | target_async_permitted = target_async_permitted_1; | |
3957 | } | |
3958 | ||
3959 | static void | |
329ea579 PA |
3960 | maint_show_target_async_command (struct ui_file *file, int from_tty, |
3961 | struct cmd_list_element *c, | |
3962 | const char *value) | |
c6ebd6cf | 3963 | { |
3e43a32a MS |
3964 | fprintf_filtered (file, |
3965 | _("Controlling the inferior in " | |
3966 | "asynchronous mode is %s.\n"), value); | |
c6ebd6cf VP |
3967 | } |
3968 | ||
fbea99ea PA |
3969 | /* Return true if the target operates in non-stop mode even with "set |
3970 | non-stop off". */ | |
3971 | ||
3972 | static int | |
3973 | target_always_non_stop_p (void) | |
3974 | { | |
3975 | return current_target.to_always_non_stop_p (¤t_target); | |
3976 | } | |
3977 | ||
3978 | /* See target.h. */ | |
3979 | ||
3980 | int | |
3981 | target_is_non_stop_p (void) | |
3982 | { | |
3983 | return (non_stop | |
3984 | || target_non_stop_enabled == AUTO_BOOLEAN_TRUE | |
3985 | || (target_non_stop_enabled == AUTO_BOOLEAN_AUTO | |
3986 | && target_always_non_stop_p ())); | |
3987 | } | |
3988 | ||
3989 | /* Controls if targets can report that they always run in non-stop | |
3990 | mode. This is just for maintainers to use when debugging gdb. */ | |
3991 | enum auto_boolean target_non_stop_enabled = AUTO_BOOLEAN_AUTO; | |
3992 | ||
3993 | /* The set command writes to this variable. If the inferior is | |
3994 | executing, target_non_stop_enabled is *not* updated. */ | |
3995 | static enum auto_boolean target_non_stop_enabled_1 = AUTO_BOOLEAN_AUTO; | |
3996 | ||
3997 | /* Implementation of "maint set target-non-stop". */ | |
3998 | ||
3999 | static void | |
4000 | maint_set_target_non_stop_command (char *args, int from_tty, | |
4001 | struct cmd_list_element *c) | |
4002 | { | |
4003 | if (have_live_inferiors ()) | |
4004 | { | |
4005 | target_non_stop_enabled_1 = target_non_stop_enabled; | |
4006 | error (_("Cannot change this setting while the inferior is running.")); | |
4007 | } | |
4008 | ||
4009 | target_non_stop_enabled = target_non_stop_enabled_1; | |
4010 | } | |
4011 | ||
4012 | /* Implementation of "maint show target-non-stop". */ | |
4013 | ||
4014 | static void | |
4015 | maint_show_target_non_stop_command (struct ui_file *file, int from_tty, | |
4016 | struct cmd_list_element *c, | |
4017 | const char *value) | |
4018 | { | |
4019 | if (target_non_stop_enabled == AUTO_BOOLEAN_AUTO) | |
4020 | fprintf_filtered (file, | |
4021 | _("Whether the target is always in non-stop mode " | |
4022 | "is %s (currently %s).\n"), value, | |
4023 | target_always_non_stop_p () ? "on" : "off"); | |
4024 | else | |
4025 | fprintf_filtered (file, | |
4026 | _("Whether the target is always in non-stop mode " | |
4027 | "is %s.\n"), value); | |
4028 | } | |
4029 | ||
d914c394 SS |
4030 | /* Temporary copies of permission settings. */ |
4031 | ||
4032 | static int may_write_registers_1 = 1; | |
4033 | static int may_write_memory_1 = 1; | |
4034 | static int may_insert_breakpoints_1 = 1; | |
4035 | static int may_insert_tracepoints_1 = 1; | |
4036 | static int may_insert_fast_tracepoints_1 = 1; | |
4037 | static int may_stop_1 = 1; | |
4038 | ||
4039 | /* Make the user-set values match the real values again. */ | |
4040 | ||
4041 | void | |
4042 | update_target_permissions (void) | |
4043 | { | |
4044 | may_write_registers_1 = may_write_registers; | |
4045 | may_write_memory_1 = may_write_memory; | |
4046 | may_insert_breakpoints_1 = may_insert_breakpoints; | |
4047 | may_insert_tracepoints_1 = may_insert_tracepoints; | |
4048 | may_insert_fast_tracepoints_1 = may_insert_fast_tracepoints; | |
4049 | may_stop_1 = may_stop; | |
4050 | } | |
4051 | ||
4052 | /* The one function handles (most of) the permission flags in the same | |
4053 | way. */ | |
4054 | ||
4055 | static void | |
4056 | set_target_permissions (char *args, int from_tty, | |
4057 | struct cmd_list_element *c) | |
4058 | { | |
4059 | if (target_has_execution) | |
4060 | { | |
4061 | update_target_permissions (); | |
4062 | error (_("Cannot change this setting while the inferior is running.")); | |
4063 | } | |
4064 | ||
4065 | /* Make the real values match the user-changed values. */ | |
4066 | may_write_registers = may_write_registers_1; | |
4067 | may_insert_breakpoints = may_insert_breakpoints_1; | |
4068 | may_insert_tracepoints = may_insert_tracepoints_1; | |
4069 | may_insert_fast_tracepoints = may_insert_fast_tracepoints_1; | |
4070 | may_stop = may_stop_1; | |
4071 | update_observer_mode (); | |
4072 | } | |
4073 | ||
4074 | /* Set memory write permission independently of observer mode. */ | |
4075 | ||
4076 | static void | |
4077 | set_write_memory_permission (char *args, int from_tty, | |
4078 | struct cmd_list_element *c) | |
4079 | { | |
4080 | /* Make the real values match the user-changed values. */ | |
4081 | may_write_memory = may_write_memory_1; | |
4082 | update_observer_mode (); | |
4083 | } | |
4084 | ||
4085 | ||
c906108c | 4086 | void |
fba45db2 | 4087 | initialize_targets (void) |
c906108c SS |
4088 | { |
4089 | init_dummy_target (); | |
4090 | push_target (&dummy_target); | |
4091 | ||
4092 | add_info ("target", target_info, targ_desc); | |
4093 | add_info ("files", target_info, targ_desc); | |
4094 | ||
ccce17b0 | 4095 | add_setshow_zuinteger_cmd ("target", class_maintenance, &targetdebug, _("\ |
85c07804 AC |
4096 | Set target debugging."), _("\ |
4097 | Show target debugging."), _("\ | |
333dabeb | 4098 | When non-zero, target debugging is enabled. Higher numbers are more\n\ |
3cecbbbe TT |
4099 | verbose."), |
4100 | set_targetdebug, | |
ccce17b0 YQ |
4101 | show_targetdebug, |
4102 | &setdebuglist, &showdebuglist); | |
3a11626d | 4103 | |
2bc416ba | 4104 | add_setshow_boolean_cmd ("trust-readonly-sections", class_support, |
7915a72c AC |
4105 | &trust_readonly, _("\ |
4106 | Set mode for reading from readonly sections."), _("\ | |
4107 | Show mode for reading from readonly sections."), _("\ | |
3a11626d MS |
4108 | When this mode is on, memory reads from readonly sections (such as .text)\n\ |
4109 | will be read from the object file instead of from the target. This will\n\ | |
7915a72c | 4110 | result in significant performance improvement for remote targets."), |
2c5b56ce | 4111 | NULL, |
920d2a44 | 4112 | show_trust_readonly, |
e707bbc2 | 4113 | &setlist, &showlist); |
96baa820 JM |
4114 | |
4115 | add_com ("monitor", class_obscure, do_monitor_command, | |
1bedd215 | 4116 | _("Send a command to the remote monitor (remote targets only).")); |
96baa820 | 4117 | |
87680a14 JB |
4118 | add_cmd ("target-stack", class_maintenance, maintenance_print_target_stack, |
4119 | _("Print the name of each layer of the internal target stack."), | |
4120 | &maintenanceprintlist); | |
4121 | ||
c6ebd6cf VP |
4122 | add_setshow_boolean_cmd ("target-async", no_class, |
4123 | &target_async_permitted_1, _("\ | |
4124 | Set whether gdb controls the inferior in asynchronous mode."), _("\ | |
4125 | Show whether gdb controls the inferior in asynchronous mode."), _("\ | |
4126 | Tells gdb whether to control the inferior in asynchronous mode."), | |
329ea579 PA |
4127 | maint_set_target_async_command, |
4128 | maint_show_target_async_command, | |
4129 | &maintenance_set_cmdlist, | |
4130 | &maintenance_show_cmdlist); | |
c6ebd6cf | 4131 | |
fbea99ea PA |
4132 | add_setshow_auto_boolean_cmd ("target-non-stop", no_class, |
4133 | &target_non_stop_enabled_1, _("\ | |
4134 | Set whether gdb always controls the inferior in non-stop mode."), _("\ | |
4135 | Show whether gdb always controls the inferior in non-stop mode."), _("\ | |
4136 | Tells gdb whether to control the inferior in non-stop mode."), | |
4137 | maint_set_target_non_stop_command, | |
4138 | maint_show_target_non_stop_command, | |
4139 | &maintenance_set_cmdlist, | |
4140 | &maintenance_show_cmdlist); | |
4141 | ||
d914c394 SS |
4142 | add_setshow_boolean_cmd ("may-write-registers", class_support, |
4143 | &may_write_registers_1, _("\ | |
4144 | Set permission to write into registers."), _("\ | |
4145 | Show permission to write into registers."), _("\ | |
4146 | When this permission is on, GDB may write into the target's registers.\n\ | |
4147 | Otherwise, any sort of write attempt will result in an error."), | |
4148 | set_target_permissions, NULL, | |
4149 | &setlist, &showlist); | |
4150 | ||
4151 | add_setshow_boolean_cmd ("may-write-memory", class_support, | |
4152 | &may_write_memory_1, _("\ | |
4153 | Set permission to write into target memory."), _("\ | |
4154 | Show permission to write into target memory."), _("\ | |
4155 | When this permission is on, GDB may write into the target's memory.\n\ | |
4156 | Otherwise, any sort of write attempt will result in an error."), | |
4157 | set_write_memory_permission, NULL, | |
4158 | &setlist, &showlist); | |
4159 | ||
4160 | add_setshow_boolean_cmd ("may-insert-breakpoints", class_support, | |
4161 | &may_insert_breakpoints_1, _("\ | |
4162 | Set permission to insert breakpoints in the target."), _("\ | |
4163 | Show permission to insert breakpoints in the target."), _("\ | |
4164 | When this permission is on, GDB may insert breakpoints in the program.\n\ | |
4165 | Otherwise, any sort of insertion attempt will result in an error."), | |
4166 | set_target_permissions, NULL, | |
4167 | &setlist, &showlist); | |
4168 | ||
4169 | add_setshow_boolean_cmd ("may-insert-tracepoints", class_support, | |
4170 | &may_insert_tracepoints_1, _("\ | |
4171 | Set permission to insert tracepoints in the target."), _("\ | |
4172 | Show permission to insert tracepoints in the target."), _("\ | |
4173 | When this permission is on, GDB may insert tracepoints in the program.\n\ | |
4174 | Otherwise, any sort of insertion attempt will result in an error."), | |
4175 | set_target_permissions, NULL, | |
4176 | &setlist, &showlist); | |
4177 | ||
4178 | add_setshow_boolean_cmd ("may-insert-fast-tracepoints", class_support, | |
4179 | &may_insert_fast_tracepoints_1, _("\ | |
4180 | Set permission to insert fast tracepoints in the target."), _("\ | |
4181 | Show permission to insert fast tracepoints in the target."), _("\ | |
4182 | When this permission is on, GDB may insert fast tracepoints.\n\ | |
4183 | Otherwise, any sort of insertion attempt will result in an error."), | |
4184 | set_target_permissions, NULL, | |
4185 | &setlist, &showlist); | |
4186 | ||
4187 | add_setshow_boolean_cmd ("may-interrupt", class_support, | |
4188 | &may_stop_1, _("\ | |
4189 | Set permission to interrupt or signal the target."), _("\ | |
4190 | Show permission to interrupt or signal the target."), _("\ | |
4191 | When this permission is on, GDB may interrupt/stop the target's execution.\n\ | |
4192 | Otherwise, any attempt to interrupt or stop will be ignored."), | |
4193 | set_target_permissions, NULL, | |
4194 | &setlist, &showlist); | |
6a3cb8e8 PA |
4195 | |
4196 | add_setshow_boolean_cmd ("auto-connect-native-target", class_support, | |
4197 | &auto_connect_native_target, _("\ | |
4198 | Set whether GDB may automatically connect to the native target."), _("\ | |
4199 | Show whether GDB may automatically connect to the native target."), _("\ | |
4200 | When on, and GDB is not connected to a target yet, GDB\n\ | |
4201 | attempts \"run\" and other commands with the native target."), | |
4202 | NULL, show_auto_connect_native_target, | |
4203 | &setlist, &showlist); | |
c906108c | 4204 | } |