Commit | Line | Data |
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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 | ||
215d3118 PA |
489 | /* Since we always run the inferior in the main console (unless "set |
490 | inferior-tty" is in effect), when some UI other than the main one | |
491 | calls target_terminal_inferior/target_terminal_inferior, then we | |
215d3118 PA |
492 | leave the main UI's terminal settings as is. */ |
493 | if (ui != main_ui) | |
494 | return; | |
495 | ||
5842f62a PA |
496 | if (terminal_state == terminal_is_inferior) |
497 | return; | |
498 | ||
d9d2d8b6 PA |
499 | /* If GDB is resuming the inferior in the foreground, install |
500 | inferior's terminal modes. */ | |
d2f640d4 | 501 | (*current_target.to_terminal_inferior) (¤t_target); |
5842f62a | 502 | terminal_state = terminal_is_inferior; |
93692b58 PA |
503 | |
504 | /* If the user hit C-c before, pretend that it was hit right | |
505 | here. */ | |
506 | if (check_quit_flag ()) | |
507 | target_pass_ctrlc (); | |
5842f62a PA |
508 | } |
509 | ||
510 | /* See target.h. */ | |
511 | ||
512 | void | |
513 | target_terminal_ours (void) | |
514 | { | |
41fd2b0f PA |
515 | struct ui *ui = current_ui; |
516 | ||
215d3118 PA |
517 | /* See target_terminal_inferior. */ |
518 | if (ui != main_ui) | |
519 | return; | |
520 | ||
5842f62a PA |
521 | if (terminal_state == terminal_is_ours) |
522 | return; | |
523 | ||
524 | (*current_target.to_terminal_ours) (¤t_target); | |
525 | terminal_state = terminal_is_ours; | |
526 | } | |
527 | ||
528 | /* See target.h. */ | |
529 | ||
530 | void | |
531 | target_terminal_ours_for_output (void) | |
532 | { | |
215d3118 PA |
533 | struct ui *ui = current_ui; |
534 | ||
535 | /* See target_terminal_inferior. */ | |
536 | if (ui != main_ui) | |
537 | return; | |
538 | ||
5842f62a PA |
539 | if (terminal_state != terminal_is_inferior) |
540 | return; | |
541 | (*current_target.to_terminal_ours_for_output) (¤t_target); | |
542 | terminal_state = terminal_is_ours_for_output; | |
d9d2d8b6 | 543 | } |
136d6dae | 544 | |
b0ed115f TT |
545 | /* See target.h. */ |
546 | ||
547 | int | |
548 | target_supports_terminal_ours (void) | |
549 | { | |
550 | struct target_ops *t; | |
551 | ||
552 | for (t = current_target.beneath; t != NULL; t = t->beneath) | |
553 | { | |
554 | if (t->to_terminal_ours != delegate_terminal_ours | |
555 | && t->to_terminal_ours != tdefault_terminal_ours) | |
556 | return 1; | |
557 | } | |
558 | ||
559 | return 0; | |
560 | } | |
561 | ||
1abf3a14 SM |
562 | /* Restore the terminal to its previous state (helper for |
563 | make_cleanup_restore_target_terminal). */ | |
564 | ||
565 | static void | |
566 | cleanup_restore_target_terminal (void *arg) | |
567 | { | |
19ba03f4 | 568 | enum terminal_state *previous_state = (enum terminal_state *) arg; |
1abf3a14 SM |
569 | |
570 | switch (*previous_state) | |
571 | { | |
572 | case terminal_is_ours: | |
573 | target_terminal_ours (); | |
574 | break; | |
575 | case terminal_is_ours_for_output: | |
576 | target_terminal_ours_for_output (); | |
577 | break; | |
578 | case terminal_is_inferior: | |
579 | target_terminal_inferior (); | |
580 | break; | |
581 | } | |
582 | } | |
583 | ||
584 | /* See target.h. */ | |
585 | ||
586 | struct cleanup * | |
587 | make_cleanup_restore_target_terminal (void) | |
588 | { | |
8d749320 | 589 | enum terminal_state *ts = XNEW (enum terminal_state); |
1abf3a14 SM |
590 | |
591 | *ts = terminal_state; | |
592 | ||
593 | return make_cleanup_dtor (cleanup_restore_target_terminal, ts, xfree); | |
594 | } | |
595 | ||
c906108c | 596 | static void |
fba45db2 | 597 | tcomplain (void) |
c906108c | 598 | { |
8a3fe4f8 | 599 | error (_("You can't do that when your target is `%s'"), |
c906108c SS |
600 | current_target.to_shortname); |
601 | } | |
602 | ||
603 | void | |
fba45db2 | 604 | noprocess (void) |
c906108c | 605 | { |
8a3fe4f8 | 606 | error (_("You can't do that without a process to debug.")); |
c906108c SS |
607 | } |
608 | ||
c906108c | 609 | static void |
0a4f40a2 | 610 | default_terminal_info (struct target_ops *self, const char *args, int from_tty) |
c906108c | 611 | { |
a3f17187 | 612 | printf_unfiltered (_("No saved terminal information.\n")); |
c906108c SS |
613 | } |
614 | ||
0ef643c8 JB |
615 | /* A default implementation for the to_get_ada_task_ptid target method. |
616 | ||
617 | This function builds the PTID by using both LWP and TID as part of | |
618 | the PTID lwp and tid elements. The pid used is the pid of the | |
619 | inferior_ptid. */ | |
620 | ||
2c0b251b | 621 | static ptid_t |
1e6b91a4 | 622 | default_get_ada_task_ptid (struct target_ops *self, long lwp, long tid) |
0ef643c8 JB |
623 | { |
624 | return ptid_build (ptid_get_pid (inferior_ptid), lwp, tid); | |
625 | } | |
626 | ||
32231432 | 627 | static enum exec_direction_kind |
4c612759 | 628 | default_execution_direction (struct target_ops *self) |
32231432 PA |
629 | { |
630 | if (!target_can_execute_reverse) | |
631 | return EXEC_FORWARD; | |
632 | else if (!target_can_async_p ()) | |
633 | return EXEC_FORWARD; | |
634 | else | |
635 | gdb_assert_not_reached ("\ | |
636 | to_execution_direction must be implemented for reverse async"); | |
637 | } | |
638 | ||
7998dfc3 AC |
639 | /* Go through the target stack from top to bottom, copying over zero |
640 | entries in current_target, then filling in still empty entries. In | |
641 | effect, we are doing class inheritance through the pushed target | |
642 | vectors. | |
643 | ||
644 | NOTE: cagney/2003-10-17: The problem with this inheritance, as it | |
645 | is currently implemented, is that it discards any knowledge of | |
646 | which target an inherited method originally belonged to. | |
647 | Consequently, new new target methods should instead explicitly and | |
648 | locally search the target stack for the target that can handle the | |
649 | request. */ | |
c906108c SS |
650 | |
651 | static void | |
7998dfc3 | 652 | update_current_target (void) |
c906108c | 653 | { |
7998dfc3 AC |
654 | struct target_ops *t; |
655 | ||
08d8bcd7 | 656 | /* First, reset current's contents. */ |
7998dfc3 AC |
657 | memset (¤t_target, 0, sizeof (current_target)); |
658 | ||
1101cb7b TT |
659 | /* Install the delegators. */ |
660 | install_delegators (¤t_target); | |
661 | ||
be4ddd36 TT |
662 | current_target.to_stratum = target_stack->to_stratum; |
663 | ||
7998dfc3 AC |
664 | #define INHERIT(FIELD, TARGET) \ |
665 | if (!current_target.FIELD) \ | |
666 | current_target.FIELD = (TARGET)->FIELD | |
667 | ||
be4ddd36 TT |
668 | /* Do not add any new INHERITs here. Instead, use the delegation |
669 | mechanism provided by make-target-delegates. */ | |
7998dfc3 AC |
670 | for (t = target_stack; t; t = t->beneath) |
671 | { | |
672 | INHERIT (to_shortname, t); | |
673 | INHERIT (to_longname, t); | |
dc177b7a | 674 | INHERIT (to_attach_no_wait, t); |
74174d2e | 675 | INHERIT (to_have_steppable_watchpoint, t); |
7998dfc3 | 676 | INHERIT (to_have_continuable_watchpoint, t); |
7998dfc3 | 677 | INHERIT (to_has_thread_control, t); |
7998dfc3 AC |
678 | } |
679 | #undef INHERIT | |
680 | ||
7998dfc3 AC |
681 | /* Finally, position the target-stack beneath the squashed |
682 | "current_target". That way code looking for a non-inherited | |
683 | target method can quickly and simply find it. */ | |
684 | current_target.beneath = target_stack; | |
b4b61fdb DJ |
685 | |
686 | if (targetdebug) | |
687 | setup_target_debug (); | |
c906108c SS |
688 | } |
689 | ||
690 | /* Push a new target type into the stack of the existing target accessors, | |
691 | possibly superseding some of the existing accessors. | |
692 | ||
c906108c SS |
693 | Rather than allow an empty stack, we always have the dummy target at |
694 | the bottom stratum, so we can call the function vectors without | |
695 | checking them. */ | |
696 | ||
b26a4dcb | 697 | void |
fba45db2 | 698 | push_target (struct target_ops *t) |
c906108c | 699 | { |
258b763a | 700 | struct target_ops **cur; |
c906108c SS |
701 | |
702 | /* Check magic number. If wrong, it probably means someone changed | |
703 | the struct definition, but not all the places that initialize one. */ | |
704 | if (t->to_magic != OPS_MAGIC) | |
705 | { | |
c5aa993b JM |
706 | fprintf_unfiltered (gdb_stderr, |
707 | "Magic number of %s target struct wrong\n", | |
708 | t->to_shortname); | |
3e43a32a MS |
709 | internal_error (__FILE__, __LINE__, |
710 | _("failed internal consistency check")); | |
c906108c SS |
711 | } |
712 | ||
258b763a AC |
713 | /* Find the proper stratum to install this target in. */ |
714 | for (cur = &target_stack; (*cur) != NULL; cur = &(*cur)->beneath) | |
c906108c | 715 | { |
258b763a | 716 | if ((int) (t->to_stratum) >= (int) (*cur)->to_stratum) |
c906108c SS |
717 | break; |
718 | } | |
719 | ||
258b763a | 720 | /* If there's already targets at this stratum, remove them. */ |
88c231eb | 721 | /* FIXME: cagney/2003-10-15: I think this should be popping all |
258b763a AC |
722 | targets to CUR, and not just those at this stratum level. */ |
723 | while ((*cur) != NULL && t->to_stratum == (*cur)->to_stratum) | |
724 | { | |
725 | /* There's already something at this stratum level. Close it, | |
726 | and un-hook it from the stack. */ | |
727 | struct target_ops *tmp = (*cur); | |
5d502164 | 728 | |
258b763a AC |
729 | (*cur) = (*cur)->beneath; |
730 | tmp->beneath = NULL; | |
460014f5 | 731 | target_close (tmp); |
258b763a | 732 | } |
c906108c SS |
733 | |
734 | /* We have removed all targets in our stratum, now add the new one. */ | |
258b763a AC |
735 | t->beneath = (*cur); |
736 | (*cur) = t; | |
c906108c SS |
737 | |
738 | update_current_target (); | |
c906108c SS |
739 | } |
740 | ||
2bc416ba | 741 | /* Remove a target_ops vector from the stack, wherever it may be. |
c906108c SS |
742 | Return how many times it was removed (0 or 1). */ |
743 | ||
744 | int | |
fba45db2 | 745 | unpush_target (struct target_ops *t) |
c906108c | 746 | { |
258b763a AC |
747 | struct target_ops **cur; |
748 | struct target_ops *tmp; | |
c906108c | 749 | |
c8d104ad PA |
750 | if (t->to_stratum == dummy_stratum) |
751 | internal_error (__FILE__, __LINE__, | |
9b20d036 | 752 | _("Attempt to unpush the dummy target")); |
c8d104ad | 753 | |
c906108c | 754 | /* Look for the specified target. Note that we assume that a target |
c378eb4e | 755 | can only occur once in the target stack. */ |
c906108c | 756 | |
258b763a AC |
757 | for (cur = &target_stack; (*cur) != NULL; cur = &(*cur)->beneath) |
758 | { | |
759 | if ((*cur) == t) | |
760 | break; | |
761 | } | |
c906108c | 762 | |
305436e0 PA |
763 | /* If we don't find target_ops, quit. Only open targets should be |
764 | closed. */ | |
258b763a | 765 | if ((*cur) == NULL) |
305436e0 | 766 | return 0; |
5269965e | 767 | |
c378eb4e | 768 | /* Unchain the target. */ |
258b763a AC |
769 | tmp = (*cur); |
770 | (*cur) = (*cur)->beneath; | |
771 | tmp->beneath = NULL; | |
c906108c SS |
772 | |
773 | update_current_target (); | |
c906108c | 774 | |
305436e0 PA |
775 | /* Finally close the target. Note we do this after unchaining, so |
776 | any target method calls from within the target_close | |
777 | implementation don't end up in T anymore. */ | |
460014f5 | 778 | target_close (t); |
305436e0 | 779 | |
c906108c SS |
780 | return 1; |
781 | } | |
782 | ||
915ef8b1 PA |
783 | /* Unpush TARGET and assert that it worked. */ |
784 | ||
785 | static void | |
786 | unpush_target_and_assert (struct target_ops *target) | |
787 | { | |
788 | if (!unpush_target (target)) | |
789 | { | |
790 | fprintf_unfiltered (gdb_stderr, | |
791 | "pop_all_targets couldn't find target %s\n", | |
792 | target->to_shortname); | |
793 | internal_error (__FILE__, __LINE__, | |
794 | _("failed internal consistency check")); | |
795 | } | |
796 | } | |
797 | ||
aa76d38d | 798 | void |
460014f5 | 799 | pop_all_targets_above (enum strata above_stratum) |
aa76d38d | 800 | { |
87ab71f0 | 801 | while ((int) (current_target.to_stratum) > (int) above_stratum) |
915ef8b1 PA |
802 | unpush_target_and_assert (target_stack); |
803 | } | |
804 | ||
805 | /* See target.h. */ | |
806 | ||
807 | void | |
808 | pop_all_targets_at_and_above (enum strata stratum) | |
809 | { | |
810 | while ((int) (current_target.to_stratum) >= (int) stratum) | |
811 | unpush_target_and_assert (target_stack); | |
aa76d38d PA |
812 | } |
813 | ||
87ab71f0 | 814 | void |
460014f5 | 815 | pop_all_targets (void) |
87ab71f0 | 816 | { |
460014f5 | 817 | pop_all_targets_above (dummy_stratum); |
87ab71f0 PA |
818 | } |
819 | ||
c0edd9ed JK |
820 | /* Return 1 if T is now pushed in the target stack. Return 0 otherwise. */ |
821 | ||
822 | int | |
823 | target_is_pushed (struct target_ops *t) | |
824 | { | |
84202f9c | 825 | struct target_ops *cur; |
c0edd9ed JK |
826 | |
827 | /* Check magic number. If wrong, it probably means someone changed | |
828 | the struct definition, but not all the places that initialize one. */ | |
829 | if (t->to_magic != OPS_MAGIC) | |
830 | { | |
831 | fprintf_unfiltered (gdb_stderr, | |
832 | "Magic number of %s target struct wrong\n", | |
833 | t->to_shortname); | |
3e43a32a MS |
834 | internal_error (__FILE__, __LINE__, |
835 | _("failed internal consistency check")); | |
c0edd9ed JK |
836 | } |
837 | ||
84202f9c TT |
838 | for (cur = target_stack; cur != NULL; cur = cur->beneath) |
839 | if (cur == t) | |
c0edd9ed JK |
840 | return 1; |
841 | ||
842 | return 0; | |
843 | } | |
844 | ||
f0f9ff95 TT |
845 | /* Default implementation of to_get_thread_local_address. */ |
846 | ||
847 | static void | |
848 | generic_tls_error (void) | |
849 | { | |
850 | throw_error (TLS_GENERIC_ERROR, | |
851 | _("Cannot find thread-local variables on this target")); | |
852 | } | |
853 | ||
72f5cf0e | 854 | /* Using the objfile specified in OBJFILE, find the address for the |
9e35dae4 DJ |
855 | current thread's thread-local storage with offset OFFSET. */ |
856 | CORE_ADDR | |
857 | target_translate_tls_address (struct objfile *objfile, CORE_ADDR offset) | |
858 | { | |
859 | volatile CORE_ADDR addr = 0; | |
f0f9ff95 | 860 | struct target_ops *target = ¤t_target; |
9e35dae4 | 861 | |
f0f9ff95 | 862 | if (gdbarch_fetch_tls_load_module_address_p (target_gdbarch ())) |
9e35dae4 DJ |
863 | { |
864 | ptid_t ptid = inferior_ptid; | |
9e35dae4 | 865 | |
492d29ea | 866 | TRY |
9e35dae4 DJ |
867 | { |
868 | CORE_ADDR lm_addr; | |
869 | ||
870 | /* Fetch the load module address for this objfile. */ | |
f5656ead | 871 | lm_addr = gdbarch_fetch_tls_load_module_address (target_gdbarch (), |
9e35dae4 | 872 | objfile); |
9e35dae4 | 873 | |
3e43a32a MS |
874 | addr = target->to_get_thread_local_address (target, ptid, |
875 | lm_addr, offset); | |
9e35dae4 DJ |
876 | } |
877 | /* If an error occurred, print TLS related messages here. Otherwise, | |
878 | throw the error to some higher catcher. */ | |
492d29ea | 879 | CATCH (ex, RETURN_MASK_ALL) |
9e35dae4 DJ |
880 | { |
881 | int objfile_is_library = (objfile->flags & OBJF_SHARED); | |
882 | ||
883 | switch (ex.error) | |
884 | { | |
885 | case TLS_NO_LIBRARY_SUPPORT_ERROR: | |
3e43a32a MS |
886 | error (_("Cannot find thread-local variables " |
887 | "in this thread library.")); | |
9e35dae4 DJ |
888 | break; |
889 | case TLS_LOAD_MODULE_NOT_FOUND_ERROR: | |
890 | if (objfile_is_library) | |
891 | error (_("Cannot find shared library `%s' in dynamic" | |
4262abfb | 892 | " linker's load module list"), objfile_name (objfile)); |
9e35dae4 DJ |
893 | else |
894 | error (_("Cannot find executable file `%s' in dynamic" | |
4262abfb | 895 | " linker's load module list"), objfile_name (objfile)); |
9e35dae4 DJ |
896 | break; |
897 | case TLS_NOT_ALLOCATED_YET_ERROR: | |
898 | if (objfile_is_library) | |
899 | error (_("The inferior has not yet allocated storage for" | |
900 | " thread-local variables in\n" | |
901 | "the shared library `%s'\n" | |
902 | "for %s"), | |
4262abfb | 903 | objfile_name (objfile), target_pid_to_str (ptid)); |
9e35dae4 DJ |
904 | else |
905 | error (_("The inferior has not yet allocated storage for" | |
906 | " thread-local variables in\n" | |
907 | "the executable `%s'\n" | |
908 | "for %s"), | |
4262abfb | 909 | objfile_name (objfile), target_pid_to_str (ptid)); |
9e35dae4 DJ |
910 | break; |
911 | case TLS_GENERIC_ERROR: | |
912 | if (objfile_is_library) | |
913 | error (_("Cannot find thread-local storage for %s, " | |
914 | "shared library %s:\n%s"), | |
915 | target_pid_to_str (ptid), | |
4262abfb | 916 | objfile_name (objfile), ex.message); |
9e35dae4 DJ |
917 | else |
918 | error (_("Cannot find thread-local storage for %s, " | |
919 | "executable file %s:\n%s"), | |
920 | target_pid_to_str (ptid), | |
4262abfb | 921 | objfile_name (objfile), ex.message); |
9e35dae4 DJ |
922 | break; |
923 | default: | |
924 | throw_exception (ex); | |
925 | break; | |
926 | } | |
927 | } | |
492d29ea | 928 | END_CATCH |
9e35dae4 DJ |
929 | } |
930 | /* It wouldn't be wrong here to try a gdbarch method, too; finding | |
931 | TLS is an ABI-specific thing. But we don't do that yet. */ | |
932 | else | |
933 | error (_("Cannot find thread-local variables on this target")); | |
934 | ||
935 | return addr; | |
936 | } | |
937 | ||
6be7b56e | 938 | const char * |
01cb8804 | 939 | target_xfer_status_to_string (enum target_xfer_status status) |
6be7b56e PA |
940 | { |
941 | #define CASE(X) case X: return #X | |
01cb8804 | 942 | switch (status) |
6be7b56e PA |
943 | { |
944 | CASE(TARGET_XFER_E_IO); | |
bc113b4e | 945 | CASE(TARGET_XFER_UNAVAILABLE); |
6be7b56e PA |
946 | default: |
947 | return "<unknown>"; | |
948 | } | |
949 | #undef CASE | |
950 | }; | |
951 | ||
952 | ||
c906108c SS |
953 | #undef MIN |
954 | #define MIN(A, B) (((A) <= (B)) ? (A) : (B)) | |
955 | ||
956 | /* target_read_string -- read a null terminated string, up to LEN bytes, | |
957 | from MEMADDR in target. Set *ERRNOP to the errno code, or 0 if successful. | |
958 | Set *STRING to a pointer to malloc'd memory containing the data; the caller | |
959 | is responsible for freeing it. Return the number of bytes successfully | |
960 | read. */ | |
961 | ||
962 | int | |
fba45db2 | 963 | target_read_string (CORE_ADDR memaddr, char **string, int len, int *errnop) |
c906108c | 964 | { |
c2e8b827 | 965 | int tlen, offset, i; |
1b0ba102 | 966 | gdb_byte buf[4]; |
c906108c SS |
967 | int errcode = 0; |
968 | char *buffer; | |
969 | int buffer_allocated; | |
970 | char *bufptr; | |
971 | unsigned int nbytes_read = 0; | |
972 | ||
6217bf3e MS |
973 | gdb_assert (string); |
974 | ||
c906108c SS |
975 | /* Small for testing. */ |
976 | buffer_allocated = 4; | |
224c3ddb | 977 | buffer = (char *) xmalloc (buffer_allocated); |
c906108c SS |
978 | bufptr = buffer; |
979 | ||
c906108c SS |
980 | while (len > 0) |
981 | { | |
982 | tlen = MIN (len, 4 - (memaddr & 3)); | |
983 | offset = memaddr & 3; | |
984 | ||
1b0ba102 | 985 | errcode = target_read_memory (memaddr & ~3, buf, sizeof buf); |
c906108c SS |
986 | if (errcode != 0) |
987 | { | |
988 | /* The transfer request might have crossed the boundary to an | |
c378eb4e | 989 | unallocated region of memory. Retry the transfer, requesting |
c906108c SS |
990 | a single byte. */ |
991 | tlen = 1; | |
992 | offset = 0; | |
b8eb5af0 | 993 | errcode = target_read_memory (memaddr, buf, 1); |
c906108c SS |
994 | if (errcode != 0) |
995 | goto done; | |
996 | } | |
997 | ||
998 | if (bufptr - buffer + tlen > buffer_allocated) | |
999 | { | |
1000 | unsigned int bytes; | |
5d502164 | 1001 | |
c906108c SS |
1002 | bytes = bufptr - buffer; |
1003 | buffer_allocated *= 2; | |
224c3ddb | 1004 | buffer = (char *) xrealloc (buffer, buffer_allocated); |
c906108c SS |
1005 | bufptr = buffer + bytes; |
1006 | } | |
1007 | ||
1008 | for (i = 0; i < tlen; i++) | |
1009 | { | |
1010 | *bufptr++ = buf[i + offset]; | |
1011 | if (buf[i + offset] == '\000') | |
1012 | { | |
1013 | nbytes_read += i + 1; | |
1014 | goto done; | |
1015 | } | |
1016 | } | |
1017 | ||
1018 | memaddr += tlen; | |
1019 | len -= tlen; | |
1020 | nbytes_read += tlen; | |
1021 | } | |
c5aa993b | 1022 | done: |
6217bf3e | 1023 | *string = buffer; |
c906108c SS |
1024 | if (errnop != NULL) |
1025 | *errnop = errcode; | |
c906108c SS |
1026 | return nbytes_read; |
1027 | } | |
1028 | ||
07b82ea5 PA |
1029 | struct target_section_table * |
1030 | target_get_section_table (struct target_ops *target) | |
1031 | { | |
7e35c012 | 1032 | return (*target->to_get_section_table) (target); |
07b82ea5 PA |
1033 | } |
1034 | ||
8db32d44 | 1035 | /* Find a section containing ADDR. */ |
07b82ea5 | 1036 | |
0542c86d | 1037 | struct target_section * |
8db32d44 AC |
1038 | target_section_by_addr (struct target_ops *target, CORE_ADDR addr) |
1039 | { | |
07b82ea5 | 1040 | struct target_section_table *table = target_get_section_table (target); |
0542c86d | 1041 | struct target_section *secp; |
07b82ea5 PA |
1042 | |
1043 | if (table == NULL) | |
1044 | return NULL; | |
1045 | ||
1046 | for (secp = table->sections; secp < table->sections_end; secp++) | |
8db32d44 AC |
1047 | { |
1048 | if (addr >= secp->addr && addr < secp->endaddr) | |
1049 | return secp; | |
1050 | } | |
1051 | return NULL; | |
1052 | } | |
1053 | ||
0fec99e8 PA |
1054 | |
1055 | /* Helper for the memory xfer routines. Checks the attributes of the | |
1056 | memory region of MEMADDR against the read or write being attempted. | |
1057 | If the access is permitted returns true, otherwise returns false. | |
1058 | REGION_P is an optional output parameter. If not-NULL, it is | |
1059 | filled with a pointer to the memory region of MEMADDR. REG_LEN | |
1060 | returns LEN trimmed to the end of the region. This is how much the | |
1061 | caller can continue requesting, if the access is permitted. A | |
1062 | single xfer request must not straddle memory region boundaries. */ | |
1063 | ||
1064 | static int | |
1065 | memory_xfer_check_region (gdb_byte *readbuf, const gdb_byte *writebuf, | |
1066 | ULONGEST memaddr, ULONGEST len, ULONGEST *reg_len, | |
1067 | struct mem_region **region_p) | |
1068 | { | |
1069 | struct mem_region *region; | |
1070 | ||
1071 | region = lookup_mem_region (memaddr); | |
1072 | ||
1073 | if (region_p != NULL) | |
1074 | *region_p = region; | |
1075 | ||
1076 | switch (region->attrib.mode) | |
1077 | { | |
1078 | case MEM_RO: | |
1079 | if (writebuf != NULL) | |
1080 | return 0; | |
1081 | break; | |
1082 | ||
1083 | case MEM_WO: | |
1084 | if (readbuf != NULL) | |
1085 | return 0; | |
1086 | break; | |
1087 | ||
1088 | case MEM_FLASH: | |
1089 | /* We only support writing to flash during "load" for now. */ | |
1090 | if (writebuf != NULL) | |
1091 | error (_("Writing to flash memory forbidden in this context")); | |
1092 | break; | |
1093 | ||
1094 | case MEM_NONE: | |
1095 | return 0; | |
1096 | } | |
1097 | ||
1098 | /* region->hi == 0 means there's no upper bound. */ | |
1099 | if (memaddr + len < region->hi || region->hi == 0) | |
1100 | *reg_len = len; | |
1101 | else | |
1102 | *reg_len = region->hi - memaddr; | |
1103 | ||
1104 | return 1; | |
1105 | } | |
1106 | ||
9f713294 YQ |
1107 | /* Read memory from more than one valid target. A core file, for |
1108 | instance, could have some of memory but delegate other bits to | |
1109 | the target below it. So, we must manually try all targets. */ | |
1110 | ||
cc9f16aa | 1111 | enum target_xfer_status |
17fde6d0 | 1112 | raw_memory_xfer_partial (struct target_ops *ops, gdb_byte *readbuf, |
9b409511 YQ |
1113 | const gdb_byte *writebuf, ULONGEST memaddr, LONGEST len, |
1114 | ULONGEST *xfered_len) | |
9f713294 | 1115 | { |
9b409511 | 1116 | enum target_xfer_status res; |
9f713294 YQ |
1117 | |
1118 | do | |
1119 | { | |
1120 | res = ops->to_xfer_partial (ops, TARGET_OBJECT_MEMORY, NULL, | |
9b409511 YQ |
1121 | readbuf, writebuf, memaddr, len, |
1122 | xfered_len); | |
1123 | if (res == TARGET_XFER_OK) | |
9f713294 YQ |
1124 | break; |
1125 | ||
633785ff | 1126 | /* Stop if the target reports that the memory is not available. */ |
bc113b4e | 1127 | if (res == TARGET_XFER_UNAVAILABLE) |
633785ff MM |
1128 | break; |
1129 | ||
9f713294 YQ |
1130 | /* We want to continue past core files to executables, but not |
1131 | past a running target's memory. */ | |
1132 | if (ops->to_has_all_memory (ops)) | |
1133 | break; | |
1134 | ||
1135 | ops = ops->beneath; | |
1136 | } | |
1137 | while (ops != NULL); | |
1138 | ||
0f26cec1 PA |
1139 | /* The cache works at the raw memory level. Make sure the cache |
1140 | gets updated with raw contents no matter what kind of memory | |
1141 | object was originally being written. Note we do write-through | |
1142 | first, so that if it fails, we don't write to the cache contents | |
1143 | that never made it to the target. */ | |
1144 | if (writebuf != NULL | |
1145 | && !ptid_equal (inferior_ptid, null_ptid) | |
1146 | && target_dcache_init_p () | |
1147 | && (stack_cache_enabled_p () || code_cache_enabled_p ())) | |
1148 | { | |
1149 | DCACHE *dcache = target_dcache_get (); | |
1150 | ||
1151 | /* Note that writing to an area of memory which wasn't present | |
1152 | in the cache doesn't cause it to be loaded in. */ | |
1153 | dcache_update (dcache, res, memaddr, writebuf, *xfered_len); | |
1154 | } | |
1155 | ||
9f713294 YQ |
1156 | return res; |
1157 | } | |
1158 | ||
7f79c47e DE |
1159 | /* Perform a partial memory transfer. |
1160 | For docs see target.h, to_xfer_partial. */ | |
cf7a04e8 | 1161 | |
9b409511 | 1162 | static enum target_xfer_status |
f0ba3972 | 1163 | memory_xfer_partial_1 (struct target_ops *ops, enum target_object object, |
17fde6d0 | 1164 | gdb_byte *readbuf, const gdb_byte *writebuf, ULONGEST memaddr, |
9b409511 | 1165 | ULONGEST len, ULONGEST *xfered_len) |
0779438d | 1166 | { |
9b409511 | 1167 | enum target_xfer_status res; |
0fec99e8 | 1168 | ULONGEST reg_len; |
cf7a04e8 | 1169 | struct mem_region *region; |
4e5d721f | 1170 | struct inferior *inf; |
cf7a04e8 | 1171 | |
07b82ea5 PA |
1172 | /* For accesses to unmapped overlay sections, read directly from |
1173 | files. Must do this first, as MEMADDR may need adjustment. */ | |
1174 | if (readbuf != NULL && overlay_debugging) | |
1175 | { | |
1176 | struct obj_section *section = find_pc_overlay (memaddr); | |
5d502164 | 1177 | |
07b82ea5 PA |
1178 | if (pc_in_unmapped_range (memaddr, section)) |
1179 | { | |
1180 | struct target_section_table *table | |
1181 | = target_get_section_table (ops); | |
1182 | const char *section_name = section->the_bfd_section->name; | |
5d502164 | 1183 | |
07b82ea5 PA |
1184 | memaddr = overlay_mapped_address (memaddr, section); |
1185 | return section_table_xfer_memory_partial (readbuf, writebuf, | |
9b409511 | 1186 | memaddr, len, xfered_len, |
07b82ea5 PA |
1187 | table->sections, |
1188 | table->sections_end, | |
1189 | section_name); | |
1190 | } | |
1191 | } | |
1192 | ||
1193 | /* Try the executable files, if "trust-readonly-sections" is set. */ | |
cf7a04e8 DJ |
1194 | if (readbuf != NULL && trust_readonly) |
1195 | { | |
0542c86d | 1196 | struct target_section *secp; |
07b82ea5 | 1197 | struct target_section_table *table; |
cf7a04e8 DJ |
1198 | |
1199 | secp = target_section_by_addr (ops, memaddr); | |
1200 | if (secp != NULL | |
2b2848e2 DE |
1201 | && (bfd_get_section_flags (secp->the_bfd_section->owner, |
1202 | secp->the_bfd_section) | |
cf7a04e8 | 1203 | & SEC_READONLY)) |
07b82ea5 PA |
1204 | { |
1205 | table = target_get_section_table (ops); | |
1206 | return section_table_xfer_memory_partial (readbuf, writebuf, | |
9b409511 | 1207 | memaddr, len, xfered_len, |
07b82ea5 PA |
1208 | table->sections, |
1209 | table->sections_end, | |
1210 | NULL); | |
1211 | } | |
98646950 UW |
1212 | } |
1213 | ||
cf7a04e8 | 1214 | /* Try GDB's internal data cache. */ |
cf7a04e8 | 1215 | |
0fec99e8 PA |
1216 | if (!memory_xfer_check_region (readbuf, writebuf, memaddr, len, ®_len, |
1217 | ®ion)) | |
1218 | return TARGET_XFER_E_IO; | |
cf7a04e8 | 1219 | |
6c95b8df | 1220 | if (!ptid_equal (inferior_ptid, null_ptid)) |
c9657e70 | 1221 | inf = find_inferior_ptid (inferior_ptid); |
6c95b8df PA |
1222 | else |
1223 | inf = NULL; | |
4e5d721f DE |
1224 | |
1225 | if (inf != NULL | |
0f26cec1 | 1226 | && readbuf != NULL |
2f4d8875 PA |
1227 | /* The dcache reads whole cache lines; that doesn't play well |
1228 | with reading from a trace buffer, because reading outside of | |
1229 | the collected memory range fails. */ | |
1230 | && get_traceframe_number () == -1 | |
4e5d721f | 1231 | && (region->attrib.cache |
29453a14 YQ |
1232 | || (stack_cache_enabled_p () && object == TARGET_OBJECT_STACK_MEMORY) |
1233 | || (code_cache_enabled_p () && object == TARGET_OBJECT_CODE_MEMORY))) | |
cf7a04e8 | 1234 | { |
2a2f9fe4 YQ |
1235 | DCACHE *dcache = target_dcache_get_or_init (); |
1236 | ||
0f26cec1 PA |
1237 | return dcache_read_memory_partial (ops, dcache, memaddr, readbuf, |
1238 | reg_len, xfered_len); | |
cf7a04e8 DJ |
1239 | } |
1240 | ||
1241 | /* If none of those methods found the memory we wanted, fall back | |
1242 | to a target partial transfer. Normally a single call to | |
1243 | to_xfer_partial is enough; if it doesn't recognize an object | |
1244 | it will call the to_xfer_partial of the next target down. | |
1245 | But for memory this won't do. Memory is the only target | |
9b409511 YQ |
1246 | object which can be read from more than one valid target. |
1247 | A core file, for instance, could have some of memory but | |
1248 | delegate other bits to the target below it. So, we must | |
1249 | manually try all targets. */ | |
1250 | ||
1251 | res = raw_memory_xfer_partial (ops, readbuf, writebuf, memaddr, reg_len, | |
1252 | xfered_len); | |
cf7a04e8 DJ |
1253 | |
1254 | /* If we still haven't got anything, return the last error. We | |
1255 | give up. */ | |
1256 | return res; | |
0779438d AC |
1257 | } |
1258 | ||
f0ba3972 PA |
1259 | /* Perform a partial memory transfer. For docs see target.h, |
1260 | to_xfer_partial. */ | |
1261 | ||
9b409511 | 1262 | static enum target_xfer_status |
f0ba3972 | 1263 | memory_xfer_partial (struct target_ops *ops, enum target_object object, |
9b409511 YQ |
1264 | gdb_byte *readbuf, const gdb_byte *writebuf, |
1265 | ULONGEST memaddr, ULONGEST len, ULONGEST *xfered_len) | |
f0ba3972 | 1266 | { |
9b409511 | 1267 | enum target_xfer_status res; |
f0ba3972 PA |
1268 | |
1269 | /* Zero length requests are ok and require no work. */ | |
1270 | if (len == 0) | |
9b409511 | 1271 | return TARGET_XFER_EOF; |
f0ba3972 PA |
1272 | |
1273 | /* Fill in READBUF with breakpoint shadows, or WRITEBUF with | |
1274 | breakpoint insns, thus hiding out from higher layers whether | |
1275 | there are software breakpoints inserted in the code stream. */ | |
1276 | if (readbuf != NULL) | |
1277 | { | |
9b409511 YQ |
1278 | res = memory_xfer_partial_1 (ops, object, readbuf, NULL, memaddr, len, |
1279 | xfered_len); | |
f0ba3972 | 1280 | |
9b409511 | 1281 | if (res == TARGET_XFER_OK && !show_memory_breakpoints) |
c63528fc | 1282 | breakpoint_xfer_memory (readbuf, NULL, NULL, memaddr, *xfered_len); |
f0ba3972 PA |
1283 | } |
1284 | else | |
1285 | { | |
d7f3ff3e | 1286 | gdb_byte *buf; |
f0ba3972 PA |
1287 | struct cleanup *old_chain; |
1288 | ||
67c059c2 AB |
1289 | /* A large write request is likely to be partially satisfied |
1290 | by memory_xfer_partial_1. We will continually malloc | |
1291 | and free a copy of the entire write request for breakpoint | |
1292 | shadow handling even though we only end up writing a small | |
09c98b44 DB |
1293 | subset of it. Cap writes to a limit specified by the target |
1294 | to mitigate this. */ | |
1295 | len = min (ops->to_get_memory_xfer_limit (ops), len); | |
67c059c2 | 1296 | |
d7f3ff3e | 1297 | buf = (gdb_byte *) xmalloc (len); |
f0ba3972 PA |
1298 | old_chain = make_cleanup (xfree, buf); |
1299 | memcpy (buf, writebuf, len); | |
1300 | ||
1301 | breakpoint_xfer_memory (NULL, buf, writebuf, memaddr, len); | |
9b409511 YQ |
1302 | res = memory_xfer_partial_1 (ops, object, NULL, buf, memaddr, len, |
1303 | xfered_len); | |
f0ba3972 PA |
1304 | |
1305 | do_cleanups (old_chain); | |
1306 | } | |
1307 | ||
1308 | return res; | |
1309 | } | |
1310 | ||
8defab1a DJ |
1311 | static void |
1312 | restore_show_memory_breakpoints (void *arg) | |
1313 | { | |
1314 | show_memory_breakpoints = (uintptr_t) arg; | |
1315 | } | |
1316 | ||
1317 | struct cleanup * | |
1318 | make_show_memory_breakpoints_cleanup (int show) | |
1319 | { | |
1320 | int current = show_memory_breakpoints; | |
8defab1a | 1321 | |
5d502164 | 1322 | show_memory_breakpoints = show; |
8defab1a DJ |
1323 | return make_cleanup (restore_show_memory_breakpoints, |
1324 | (void *) (uintptr_t) current); | |
1325 | } | |
1326 | ||
7f79c47e DE |
1327 | /* For docs see target.h, to_xfer_partial. */ |
1328 | ||
9b409511 | 1329 | enum target_xfer_status |
27394598 AC |
1330 | target_xfer_partial (struct target_ops *ops, |
1331 | enum target_object object, const char *annex, | |
4ac248ca | 1332 | gdb_byte *readbuf, const gdb_byte *writebuf, |
9b409511 YQ |
1333 | ULONGEST offset, ULONGEST len, |
1334 | ULONGEST *xfered_len) | |
27394598 | 1335 | { |
9b409511 | 1336 | enum target_xfer_status retval; |
27394598 AC |
1337 | |
1338 | gdb_assert (ops->to_xfer_partial != NULL); | |
cf7a04e8 | 1339 | |
ce6d0892 YQ |
1340 | /* Transfer is done when LEN is zero. */ |
1341 | if (len == 0) | |
9b409511 | 1342 | return TARGET_XFER_EOF; |
ce6d0892 | 1343 | |
d914c394 SS |
1344 | if (writebuf && !may_write_memory) |
1345 | error (_("Writing to memory is not allowed (addr %s, len %s)"), | |
1346 | core_addr_to_string_nz (offset), plongest (len)); | |
1347 | ||
9b409511 YQ |
1348 | *xfered_len = 0; |
1349 | ||
cf7a04e8 DJ |
1350 | /* If this is a memory transfer, let the memory-specific code |
1351 | have a look at it instead. Memory transfers are more | |
1352 | complicated. */ | |
29453a14 YQ |
1353 | if (object == TARGET_OBJECT_MEMORY || object == TARGET_OBJECT_STACK_MEMORY |
1354 | || object == TARGET_OBJECT_CODE_MEMORY) | |
4e5d721f | 1355 | retval = memory_xfer_partial (ops, object, readbuf, |
9b409511 | 1356 | writebuf, offset, len, xfered_len); |
9f713294 | 1357 | else if (object == TARGET_OBJECT_RAW_MEMORY) |
cf7a04e8 | 1358 | { |
0fec99e8 PA |
1359 | /* Skip/avoid accessing the target if the memory region |
1360 | attributes block the access. Check this here instead of in | |
1361 | raw_memory_xfer_partial as otherwise we'd end up checking | |
1362 | this twice in the case of the memory_xfer_partial path is | |
1363 | taken; once before checking the dcache, and another in the | |
1364 | tail call to raw_memory_xfer_partial. */ | |
1365 | if (!memory_xfer_check_region (readbuf, writebuf, offset, len, &len, | |
1366 | NULL)) | |
1367 | return TARGET_XFER_E_IO; | |
1368 | ||
9f713294 | 1369 | /* Request the normal memory object from other layers. */ |
9b409511 YQ |
1370 | retval = raw_memory_xfer_partial (ops, readbuf, writebuf, offset, len, |
1371 | xfered_len); | |
cf7a04e8 | 1372 | } |
9f713294 YQ |
1373 | else |
1374 | retval = ops->to_xfer_partial (ops, object, annex, readbuf, | |
9b409511 | 1375 | writebuf, offset, len, xfered_len); |
cf7a04e8 | 1376 | |
27394598 AC |
1377 | if (targetdebug) |
1378 | { | |
1379 | const unsigned char *myaddr = NULL; | |
1380 | ||
1381 | fprintf_unfiltered (gdb_stdlog, | |
3e43a32a | 1382 | "%s:target_xfer_partial " |
9b409511 | 1383 | "(%d, %s, %s, %s, %s, %s) = %d, %s", |
27394598 AC |
1384 | ops->to_shortname, |
1385 | (int) object, | |
1386 | (annex ? annex : "(null)"), | |
53b71562 JB |
1387 | host_address_to_string (readbuf), |
1388 | host_address_to_string (writebuf), | |
0b1553bc | 1389 | core_addr_to_string_nz (offset), |
9b409511 YQ |
1390 | pulongest (len), retval, |
1391 | pulongest (*xfered_len)); | |
27394598 AC |
1392 | |
1393 | if (readbuf) | |
1394 | myaddr = readbuf; | |
1395 | if (writebuf) | |
1396 | myaddr = writebuf; | |
9b409511 | 1397 | if (retval == TARGET_XFER_OK && myaddr != NULL) |
27394598 AC |
1398 | { |
1399 | int i; | |
2bc416ba | 1400 | |
27394598 | 1401 | fputs_unfiltered (", bytes =", gdb_stdlog); |
9b409511 | 1402 | for (i = 0; i < *xfered_len; i++) |
27394598 | 1403 | { |
53b71562 | 1404 | if ((((intptr_t) &(myaddr[i])) & 0xf) == 0) |
27394598 AC |
1405 | { |
1406 | if (targetdebug < 2 && i > 0) | |
1407 | { | |
1408 | fprintf_unfiltered (gdb_stdlog, " ..."); | |
1409 | break; | |
1410 | } | |
1411 | fprintf_unfiltered (gdb_stdlog, "\n"); | |
1412 | } | |
2bc416ba | 1413 | |
27394598 AC |
1414 | fprintf_unfiltered (gdb_stdlog, " %02x", myaddr[i] & 0xff); |
1415 | } | |
1416 | } | |
2bc416ba | 1417 | |
27394598 AC |
1418 | fputc_unfiltered ('\n', gdb_stdlog); |
1419 | } | |
9b409511 YQ |
1420 | |
1421 | /* Check implementations of to_xfer_partial update *XFERED_LEN | |
1422 | properly. Do assertion after printing debug messages, so that we | |
1423 | can find more clues on assertion failure from debugging messages. */ | |
bc113b4e | 1424 | if (retval == TARGET_XFER_OK || retval == TARGET_XFER_UNAVAILABLE) |
9b409511 YQ |
1425 | gdb_assert (*xfered_len > 0); |
1426 | ||
27394598 AC |
1427 | return retval; |
1428 | } | |
1429 | ||
578d3588 PA |
1430 | /* Read LEN bytes of target memory at address MEMADDR, placing the |
1431 | results in GDB's memory at MYADDR. Returns either 0 for success or | |
d09f2c3f | 1432 | -1 if any error occurs. |
c906108c SS |
1433 | |
1434 | If an error occurs, no guarantee is made about the contents of the data at | |
1435 | MYADDR. In particular, the caller should not depend upon partial reads | |
1436 | filling the buffer with good data. There is no way for the caller to know | |
1437 | how much good data might have been transfered anyway. Callers that can | |
cf7a04e8 | 1438 | deal with partial reads should call target_read (which will retry until |
c378eb4e | 1439 | it makes no progress, and then return how much was transferred). */ |
c906108c SS |
1440 | |
1441 | int | |
1b162304 | 1442 | target_read_memory (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len) |
c906108c | 1443 | { |
c35b1492 PA |
1444 | /* Dispatch to the topmost target, not the flattened current_target. |
1445 | Memory accesses check target->to_has_(all_)memory, and the | |
1446 | flattened target doesn't inherit those. */ | |
1447 | if (target_read (current_target.beneath, TARGET_OBJECT_MEMORY, NULL, | |
cf7a04e8 DJ |
1448 | myaddr, memaddr, len) == len) |
1449 | return 0; | |
0779438d | 1450 | else |
d09f2c3f | 1451 | return -1; |
c906108c SS |
1452 | } |
1453 | ||
721ec300 GB |
1454 | /* See target/target.h. */ |
1455 | ||
1456 | int | |
1457 | target_read_uint32 (CORE_ADDR memaddr, uint32_t *result) | |
1458 | { | |
1459 | gdb_byte buf[4]; | |
1460 | int r; | |
1461 | ||
1462 | r = target_read_memory (memaddr, buf, sizeof buf); | |
1463 | if (r != 0) | |
1464 | return r; | |
1465 | *result = extract_unsigned_integer (buf, sizeof buf, | |
1466 | gdbarch_byte_order (target_gdbarch ())); | |
1467 | return 0; | |
1468 | } | |
1469 | ||
aee4bf85 PA |
1470 | /* Like target_read_memory, but specify explicitly that this is a read |
1471 | from the target's raw memory. That is, this read bypasses the | |
1472 | dcache, breakpoint shadowing, etc. */ | |
1473 | ||
1474 | int | |
1475 | target_read_raw_memory (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len) | |
1476 | { | |
1477 | /* See comment in target_read_memory about why the request starts at | |
1478 | current_target.beneath. */ | |
1479 | if (target_read (current_target.beneath, TARGET_OBJECT_RAW_MEMORY, NULL, | |
1480 | myaddr, memaddr, len) == len) | |
1481 | return 0; | |
1482 | else | |
d09f2c3f | 1483 | return -1; |
aee4bf85 PA |
1484 | } |
1485 | ||
4e5d721f DE |
1486 | /* Like target_read_memory, but specify explicitly that this is a read from |
1487 | the target's stack. This may trigger different cache behavior. */ | |
1488 | ||
1489 | int | |
45aa4659 | 1490 | target_read_stack (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len) |
4e5d721f | 1491 | { |
aee4bf85 PA |
1492 | /* See comment in target_read_memory about why the request starts at |
1493 | current_target.beneath. */ | |
4e5d721f DE |
1494 | if (target_read (current_target.beneath, TARGET_OBJECT_STACK_MEMORY, NULL, |
1495 | myaddr, memaddr, len) == len) | |
1496 | return 0; | |
1497 | else | |
d09f2c3f | 1498 | return -1; |
4e5d721f DE |
1499 | } |
1500 | ||
29453a14 YQ |
1501 | /* Like target_read_memory, but specify explicitly that this is a read from |
1502 | the target's code. This may trigger different cache behavior. */ | |
1503 | ||
1504 | int | |
1505 | target_read_code (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len) | |
1506 | { | |
aee4bf85 PA |
1507 | /* See comment in target_read_memory about why the request starts at |
1508 | current_target.beneath. */ | |
29453a14 YQ |
1509 | if (target_read (current_target.beneath, TARGET_OBJECT_CODE_MEMORY, NULL, |
1510 | myaddr, memaddr, len) == len) | |
1511 | return 0; | |
1512 | else | |
d09f2c3f | 1513 | return -1; |
29453a14 YQ |
1514 | } |
1515 | ||
7f79c47e | 1516 | /* Write LEN bytes from MYADDR to target memory at address MEMADDR. |
d09f2c3f PA |
1517 | Returns either 0 for success or -1 if any error occurs. If an |
1518 | error occurs, no guarantee is made about how much data got written. | |
1519 | Callers that can deal with partial writes should call | |
1520 | target_write. */ | |
7f79c47e | 1521 | |
c906108c | 1522 | int |
45aa4659 | 1523 | target_write_memory (CORE_ADDR memaddr, const gdb_byte *myaddr, ssize_t len) |
c906108c | 1524 | { |
aee4bf85 PA |
1525 | /* See comment in target_read_memory about why the request starts at |
1526 | current_target.beneath. */ | |
c35b1492 | 1527 | if (target_write (current_target.beneath, TARGET_OBJECT_MEMORY, NULL, |
cf7a04e8 DJ |
1528 | myaddr, memaddr, len) == len) |
1529 | return 0; | |
0779438d | 1530 | else |
d09f2c3f | 1531 | return -1; |
c906108c | 1532 | } |
c5aa993b | 1533 | |
f0ba3972 | 1534 | /* Write LEN bytes from MYADDR to target raw memory at address |
d09f2c3f PA |
1535 | MEMADDR. Returns either 0 for success or -1 if any error occurs. |
1536 | If an error occurs, no guarantee is made about how much data got | |
1537 | written. Callers that can deal with partial writes should call | |
1538 | target_write. */ | |
f0ba3972 PA |
1539 | |
1540 | int | |
45aa4659 | 1541 | target_write_raw_memory (CORE_ADDR memaddr, const gdb_byte *myaddr, ssize_t len) |
f0ba3972 | 1542 | { |
aee4bf85 PA |
1543 | /* See comment in target_read_memory about why the request starts at |
1544 | current_target.beneath. */ | |
f0ba3972 PA |
1545 | if (target_write (current_target.beneath, TARGET_OBJECT_RAW_MEMORY, NULL, |
1546 | myaddr, memaddr, len) == len) | |
1547 | return 0; | |
1548 | else | |
d09f2c3f | 1549 | return -1; |
f0ba3972 PA |
1550 | } |
1551 | ||
fd79ecee DJ |
1552 | /* Fetch the target's memory map. */ |
1553 | ||
1554 | VEC(mem_region_s) * | |
1555 | target_memory_map (void) | |
1556 | { | |
1557 | VEC(mem_region_s) *result; | |
1558 | struct mem_region *last_one, *this_one; | |
1559 | int ix; | |
6b2c5a57 | 1560 | result = current_target.to_memory_map (¤t_target); |
fd79ecee DJ |
1561 | if (result == NULL) |
1562 | return NULL; | |
1563 | ||
1564 | qsort (VEC_address (mem_region_s, result), | |
1565 | VEC_length (mem_region_s, result), | |
1566 | sizeof (struct mem_region), mem_region_cmp); | |
1567 | ||
1568 | /* Check that regions do not overlap. Simultaneously assign | |
1569 | a numbering for the "mem" commands to use to refer to | |
1570 | each region. */ | |
1571 | last_one = NULL; | |
1572 | for (ix = 0; VEC_iterate (mem_region_s, result, ix, this_one); ix++) | |
1573 | { | |
1574 | this_one->number = ix; | |
1575 | ||
1576 | if (last_one && last_one->hi > this_one->lo) | |
1577 | { | |
1578 | warning (_("Overlapping regions in memory map: ignoring")); | |
1579 | VEC_free (mem_region_s, result); | |
1580 | return NULL; | |
1581 | } | |
1582 | last_one = this_one; | |
1583 | } | |
1584 | ||
1585 | return result; | |
1586 | } | |
1587 | ||
a76d924d DJ |
1588 | void |
1589 | target_flash_erase (ULONGEST address, LONGEST length) | |
1590 | { | |
e8a6c6ac | 1591 | current_target.to_flash_erase (¤t_target, address, length); |
a76d924d DJ |
1592 | } |
1593 | ||
1594 | void | |
1595 | target_flash_done (void) | |
1596 | { | |
f6fb2925 | 1597 | current_target.to_flash_done (¤t_target); |
a76d924d DJ |
1598 | } |
1599 | ||
920d2a44 AC |
1600 | static void |
1601 | show_trust_readonly (struct ui_file *file, int from_tty, | |
1602 | struct cmd_list_element *c, const char *value) | |
1603 | { | |
3e43a32a MS |
1604 | fprintf_filtered (file, |
1605 | _("Mode for reading from readonly sections is %s.\n"), | |
920d2a44 AC |
1606 | value); |
1607 | } | |
3a11626d | 1608 | |
7f79c47e | 1609 | /* Target vector read/write partial wrapper functions. */ |
0088c768 | 1610 | |
9b409511 | 1611 | static enum target_xfer_status |
1e3ff5ad AC |
1612 | target_read_partial (struct target_ops *ops, |
1613 | enum target_object object, | |
1b0ba102 | 1614 | const char *annex, gdb_byte *buf, |
9b409511 YQ |
1615 | ULONGEST offset, ULONGEST len, |
1616 | ULONGEST *xfered_len) | |
1e3ff5ad | 1617 | { |
9b409511 YQ |
1618 | return target_xfer_partial (ops, object, annex, buf, NULL, offset, len, |
1619 | xfered_len); | |
1e3ff5ad AC |
1620 | } |
1621 | ||
8a55ffb0 | 1622 | static enum target_xfer_status |
1e3ff5ad AC |
1623 | target_write_partial (struct target_ops *ops, |
1624 | enum target_object object, | |
1b0ba102 | 1625 | const char *annex, const gdb_byte *buf, |
9b409511 | 1626 | ULONGEST offset, LONGEST len, ULONGEST *xfered_len) |
1e3ff5ad | 1627 | { |
9b409511 YQ |
1628 | return target_xfer_partial (ops, object, annex, NULL, buf, offset, len, |
1629 | xfered_len); | |
1e3ff5ad AC |
1630 | } |
1631 | ||
1632 | /* Wrappers to perform the full transfer. */ | |
7f79c47e DE |
1633 | |
1634 | /* For docs on target_read see target.h. */ | |
1635 | ||
1e3ff5ad AC |
1636 | LONGEST |
1637 | target_read (struct target_ops *ops, | |
1638 | enum target_object object, | |
1b0ba102 | 1639 | const char *annex, gdb_byte *buf, |
1e3ff5ad AC |
1640 | ULONGEST offset, LONGEST len) |
1641 | { | |
279a6fed | 1642 | LONGEST xfered_total = 0; |
d309493c SM |
1643 | int unit_size = 1; |
1644 | ||
1645 | /* If we are reading from a memory object, find the length of an addressable | |
1646 | unit for that architecture. */ | |
1647 | if (object == TARGET_OBJECT_MEMORY | |
1648 | || object == TARGET_OBJECT_STACK_MEMORY | |
1649 | || object == TARGET_OBJECT_CODE_MEMORY | |
1650 | || object == TARGET_OBJECT_RAW_MEMORY) | |
1651 | unit_size = gdbarch_addressable_memory_unit_size (target_gdbarch ()); | |
5d502164 | 1652 | |
279a6fed | 1653 | while (xfered_total < len) |
1e3ff5ad | 1654 | { |
279a6fed | 1655 | ULONGEST xfered_partial; |
9b409511 YQ |
1656 | enum target_xfer_status status; |
1657 | ||
1658 | status = target_read_partial (ops, object, annex, | |
d309493c | 1659 | buf + xfered_total * unit_size, |
279a6fed SM |
1660 | offset + xfered_total, len - xfered_total, |
1661 | &xfered_partial); | |
5d502164 | 1662 | |
1e3ff5ad | 1663 | /* Call an observer, notifying them of the xfer progress? */ |
9b409511 | 1664 | if (status == TARGET_XFER_EOF) |
279a6fed | 1665 | return xfered_total; |
9b409511 YQ |
1666 | else if (status == TARGET_XFER_OK) |
1667 | { | |
279a6fed | 1668 | xfered_total += xfered_partial; |
9b409511 YQ |
1669 | QUIT; |
1670 | } | |
1671 | else | |
279a6fed | 1672 | return TARGET_XFER_E_IO; |
9b409511 | 1673 | |
1e3ff5ad AC |
1674 | } |
1675 | return len; | |
1676 | } | |
1677 | ||
f1a507a1 JB |
1678 | /* Assuming that the entire [begin, end) range of memory cannot be |
1679 | read, try to read whatever subrange is possible to read. | |
1680 | ||
1681 | The function returns, in RESULT, either zero or one memory block. | |
1682 | If there's a readable subrange at the beginning, it is completely | |
1683 | read and returned. Any further readable subrange will not be read. | |
1684 | Otherwise, if there's a readable subrange at the end, it will be | |
1685 | completely read and returned. Any readable subranges before it | |
1686 | (obviously, not starting at the beginning), will be ignored. In | |
1687 | other cases -- either no readable subrange, or readable subrange(s) | |
1688 | that is neither at the beginning, or end, nothing is returned. | |
1689 | ||
1690 | The purpose of this function is to handle a read across a boundary | |
1691 | of accessible memory in a case when memory map is not available. | |
1692 | The above restrictions are fine for this case, but will give | |
1693 | incorrect results if the memory is 'patchy'. However, supporting | |
1694 | 'patchy' memory would require trying to read every single byte, | |
1695 | and it seems unacceptable solution. Explicit memory map is | |
1696 | recommended for this case -- and target_read_memory_robust will | |
1697 | take care of reading multiple ranges then. */ | |
8dedea02 VP |
1698 | |
1699 | static void | |
3e43a32a | 1700 | read_whatever_is_readable (struct target_ops *ops, |
279a6fed | 1701 | const ULONGEST begin, const ULONGEST end, |
d309493c | 1702 | int unit_size, |
8dedea02 | 1703 | VEC(memory_read_result_s) **result) |
d5086790 | 1704 | { |
224c3ddb | 1705 | gdb_byte *buf = (gdb_byte *) xmalloc (end - begin); |
8dedea02 VP |
1706 | ULONGEST current_begin = begin; |
1707 | ULONGEST current_end = end; | |
1708 | int forward; | |
1709 | memory_read_result_s r; | |
9b409511 | 1710 | ULONGEST xfered_len; |
8dedea02 VP |
1711 | |
1712 | /* If we previously failed to read 1 byte, nothing can be done here. */ | |
1713 | if (end - begin <= 1) | |
13b3fd9b MS |
1714 | { |
1715 | xfree (buf); | |
1716 | return; | |
1717 | } | |
8dedea02 VP |
1718 | |
1719 | /* Check that either first or the last byte is readable, and give up | |
c378eb4e | 1720 | if not. This heuristic is meant to permit reading accessible memory |
8dedea02 VP |
1721 | at the boundary of accessible region. */ |
1722 | if (target_read_partial (ops, TARGET_OBJECT_MEMORY, NULL, | |
9b409511 | 1723 | buf, begin, 1, &xfered_len) == TARGET_XFER_OK) |
8dedea02 VP |
1724 | { |
1725 | forward = 1; | |
1726 | ++current_begin; | |
1727 | } | |
1728 | else if (target_read_partial (ops, TARGET_OBJECT_MEMORY, NULL, | |
279a6fed | 1729 | buf + (end - begin) - 1, end - 1, 1, |
9b409511 | 1730 | &xfered_len) == TARGET_XFER_OK) |
8dedea02 VP |
1731 | { |
1732 | forward = 0; | |
1733 | --current_end; | |
1734 | } | |
1735 | else | |
1736 | { | |
13b3fd9b | 1737 | xfree (buf); |
8dedea02 VP |
1738 | return; |
1739 | } | |
1740 | ||
1741 | /* Loop invariant is that the [current_begin, current_end) was previously | |
1742 | found to be not readable as a whole. | |
1743 | ||
1744 | Note loop condition -- if the range has 1 byte, we can't divide the range | |
1745 | so there's no point trying further. */ | |
1746 | while (current_end - current_begin > 1) | |
1747 | { | |
1748 | ULONGEST first_half_begin, first_half_end; | |
1749 | ULONGEST second_half_begin, second_half_end; | |
1750 | LONGEST xfer; | |
279a6fed | 1751 | ULONGEST middle = current_begin + (current_end - current_begin) / 2; |
f1a507a1 | 1752 | |
8dedea02 VP |
1753 | if (forward) |
1754 | { | |
1755 | first_half_begin = current_begin; | |
1756 | first_half_end = middle; | |
1757 | second_half_begin = middle; | |
1758 | second_half_end = current_end; | |
1759 | } | |
1760 | else | |
1761 | { | |
1762 | first_half_begin = middle; | |
1763 | first_half_end = current_end; | |
1764 | second_half_begin = current_begin; | |
1765 | second_half_end = middle; | |
1766 | } | |
1767 | ||
1768 | xfer = target_read (ops, TARGET_OBJECT_MEMORY, NULL, | |
d309493c | 1769 | buf + (first_half_begin - begin) * unit_size, |
8dedea02 VP |
1770 | first_half_begin, |
1771 | first_half_end - first_half_begin); | |
1772 | ||
1773 | if (xfer == first_half_end - first_half_begin) | |
1774 | { | |
c378eb4e | 1775 | /* This half reads up fine. So, the error must be in the |
3e43a32a | 1776 | other half. */ |
8dedea02 VP |
1777 | current_begin = second_half_begin; |
1778 | current_end = second_half_end; | |
1779 | } | |
1780 | else | |
1781 | { | |
c378eb4e | 1782 | /* This half is not readable. Because we've tried one byte, we |
279a6fed | 1783 | know some part of this half if actually readable. Go to the next |
8dedea02 VP |
1784 | iteration to divide again and try to read. |
1785 | ||
1786 | We don't handle the other half, because this function only tries | |
1787 | to read a single readable subrange. */ | |
1788 | current_begin = first_half_begin; | |
1789 | current_end = first_half_end; | |
1790 | } | |
1791 | } | |
1792 | ||
1793 | if (forward) | |
1794 | { | |
1795 | /* The [begin, current_begin) range has been read. */ | |
1796 | r.begin = begin; | |
1797 | r.end = current_begin; | |
1798 | r.data = buf; | |
1799 | } | |
1800 | else | |
1801 | { | |
1802 | /* The [current_end, end) range has been read. */ | |
279a6fed | 1803 | LONGEST region_len = end - current_end; |
f1a507a1 | 1804 | |
224c3ddb | 1805 | r.data = (gdb_byte *) xmalloc (region_len * unit_size); |
d309493c SM |
1806 | memcpy (r.data, buf + (current_end - begin) * unit_size, |
1807 | region_len * unit_size); | |
8dedea02 VP |
1808 | r.begin = current_end; |
1809 | r.end = end; | |
1810 | xfree (buf); | |
1811 | } | |
1812 | VEC_safe_push(memory_read_result_s, (*result), &r); | |
1813 | } | |
1814 | ||
1815 | void | |
1816 | free_memory_read_result_vector (void *x) | |
1817 | { | |
9d78f827 | 1818 | VEC(memory_read_result_s) **v = (VEC(memory_read_result_s) **) x; |
8dedea02 VP |
1819 | memory_read_result_s *current; |
1820 | int ix; | |
1821 | ||
9d78f827 | 1822 | for (ix = 0; VEC_iterate (memory_read_result_s, *v, ix, current); ++ix) |
8dedea02 VP |
1823 | { |
1824 | xfree (current->data); | |
1825 | } | |
9d78f827 | 1826 | VEC_free (memory_read_result_s, *v); |
8dedea02 VP |
1827 | } |
1828 | ||
1829 | VEC(memory_read_result_s) * | |
279a6fed SM |
1830 | read_memory_robust (struct target_ops *ops, |
1831 | const ULONGEST offset, const LONGEST len) | |
8dedea02 VP |
1832 | { |
1833 | VEC(memory_read_result_s) *result = 0; | |
d309493c | 1834 | int unit_size = gdbarch_addressable_memory_unit_size (target_gdbarch ()); |
9d78f827 TT |
1835 | struct cleanup *cleanup = make_cleanup (free_memory_read_result_vector, |
1836 | &result); | |
8dedea02 | 1837 | |
279a6fed SM |
1838 | LONGEST xfered_total = 0; |
1839 | while (xfered_total < len) | |
d5086790 | 1840 | { |
279a6fed SM |
1841 | struct mem_region *region = lookup_mem_region (offset + xfered_total); |
1842 | LONGEST region_len; | |
5d502164 | 1843 | |
8dedea02 VP |
1844 | /* If there is no explicit region, a fake one should be created. */ |
1845 | gdb_assert (region); | |
1846 | ||
1847 | if (region->hi == 0) | |
279a6fed | 1848 | region_len = len - xfered_total; |
8dedea02 | 1849 | else |
279a6fed | 1850 | region_len = region->hi - offset; |
8dedea02 VP |
1851 | |
1852 | if (region->attrib.mode == MEM_NONE || region->attrib.mode == MEM_WO) | |
d5086790 | 1853 | { |
c378eb4e | 1854 | /* Cannot read this region. Note that we can end up here only |
8dedea02 VP |
1855 | if the region is explicitly marked inaccessible, or |
1856 | 'inaccessible-by-default' is in effect. */ | |
279a6fed | 1857 | xfered_total += region_len; |
8dedea02 VP |
1858 | } |
1859 | else | |
1860 | { | |
279a6fed | 1861 | LONGEST to_read = min (len - xfered_total, region_len); |
d309493c | 1862 | gdb_byte *buffer = (gdb_byte *) xmalloc (to_read * unit_size); |
9d78f827 | 1863 | struct cleanup *inner_cleanup = make_cleanup (xfree, buffer); |
8dedea02 | 1864 | |
279a6fed SM |
1865 | LONGEST xfered_partial = |
1866 | target_read (ops, TARGET_OBJECT_MEMORY, NULL, | |
1867 | (gdb_byte *) buffer, | |
1868 | offset + xfered_total, to_read); | |
8dedea02 | 1869 | /* Call an observer, notifying them of the xfer progress? */ |
279a6fed | 1870 | if (xfered_partial <= 0) |
d5086790 | 1871 | { |
c378eb4e | 1872 | /* Got an error reading full chunk. See if maybe we can read |
8dedea02 | 1873 | some subrange. */ |
9d78f827 | 1874 | do_cleanups (inner_cleanup); |
e084c964 DB |
1875 | read_whatever_is_readable (ops, offset + xfered_total, |
1876 | offset + xfered_total + to_read, | |
1877 | unit_size, &result); | |
279a6fed | 1878 | xfered_total += to_read; |
d5086790 | 1879 | } |
8dedea02 VP |
1880 | else |
1881 | { | |
1882 | struct memory_read_result r; | |
9d78f827 TT |
1883 | |
1884 | discard_cleanups (inner_cleanup); | |
8dedea02 | 1885 | r.data = buffer; |
279a6fed SM |
1886 | r.begin = offset + xfered_total; |
1887 | r.end = r.begin + xfered_partial; | |
8dedea02 | 1888 | VEC_safe_push (memory_read_result_s, result, &r); |
279a6fed | 1889 | xfered_total += xfered_partial; |
8dedea02 VP |
1890 | } |
1891 | QUIT; | |
d5086790 | 1892 | } |
d5086790 | 1893 | } |
9d78f827 TT |
1894 | |
1895 | discard_cleanups (cleanup); | |
8dedea02 | 1896 | return result; |
d5086790 VP |
1897 | } |
1898 | ||
8dedea02 | 1899 | |
cf7a04e8 DJ |
1900 | /* An alternative to target_write with progress callbacks. */ |
1901 | ||
1e3ff5ad | 1902 | LONGEST |
cf7a04e8 DJ |
1903 | target_write_with_progress (struct target_ops *ops, |
1904 | enum target_object object, | |
1905 | const char *annex, const gdb_byte *buf, | |
1906 | ULONGEST offset, LONGEST len, | |
1907 | void (*progress) (ULONGEST, void *), void *baton) | |
1e3ff5ad | 1908 | { |
279a6fed | 1909 | LONGEST xfered_total = 0; |
d309493c SM |
1910 | int unit_size = 1; |
1911 | ||
1912 | /* If we are writing to a memory object, find the length of an addressable | |
1913 | unit for that architecture. */ | |
1914 | if (object == TARGET_OBJECT_MEMORY | |
1915 | || object == TARGET_OBJECT_STACK_MEMORY | |
1916 | || object == TARGET_OBJECT_CODE_MEMORY | |
1917 | || object == TARGET_OBJECT_RAW_MEMORY) | |
1918 | unit_size = gdbarch_addressable_memory_unit_size (target_gdbarch ()); | |
a76d924d DJ |
1919 | |
1920 | /* Give the progress callback a chance to set up. */ | |
1921 | if (progress) | |
1922 | (*progress) (0, baton); | |
1923 | ||
279a6fed | 1924 | while (xfered_total < len) |
1e3ff5ad | 1925 | { |
279a6fed | 1926 | ULONGEST xfered_partial; |
9b409511 YQ |
1927 | enum target_xfer_status status; |
1928 | ||
1929 | status = target_write_partial (ops, object, annex, | |
d309493c | 1930 | buf + xfered_total * unit_size, |
279a6fed SM |
1931 | offset + xfered_total, len - xfered_total, |
1932 | &xfered_partial); | |
cf7a04e8 | 1933 | |
5c328c05 | 1934 | if (status != TARGET_XFER_OK) |
279a6fed | 1935 | return status == TARGET_XFER_EOF ? xfered_total : TARGET_XFER_E_IO; |
cf7a04e8 DJ |
1936 | |
1937 | if (progress) | |
279a6fed | 1938 | (*progress) (xfered_partial, baton); |
cf7a04e8 | 1939 | |
279a6fed | 1940 | xfered_total += xfered_partial; |
1e3ff5ad AC |
1941 | QUIT; |
1942 | } | |
1943 | return len; | |
1944 | } | |
1945 | ||
7f79c47e DE |
1946 | /* For docs on target_write see target.h. */ |
1947 | ||
cf7a04e8 DJ |
1948 | LONGEST |
1949 | target_write (struct target_ops *ops, | |
1950 | enum target_object object, | |
1951 | const char *annex, const gdb_byte *buf, | |
1952 | ULONGEST offset, LONGEST len) | |
1953 | { | |
1954 | return target_write_with_progress (ops, object, annex, buf, offset, len, | |
1955 | NULL, NULL); | |
1956 | } | |
1957 | ||
159f81f3 DJ |
1958 | /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return |
1959 | the size of the transferred data. PADDING additional bytes are | |
1960 | available in *BUF_P. This is a helper function for | |
1961 | target_read_alloc; see the declaration of that function for more | |
1962 | information. */ | |
13547ab6 | 1963 | |
159f81f3 DJ |
1964 | static LONGEST |
1965 | target_read_alloc_1 (struct target_ops *ops, enum target_object object, | |
1966 | const char *annex, gdb_byte **buf_p, int padding) | |
13547ab6 DJ |
1967 | { |
1968 | size_t buf_alloc, buf_pos; | |
1969 | gdb_byte *buf; | |
13547ab6 DJ |
1970 | |
1971 | /* This function does not have a length parameter; it reads the | |
1972 | entire OBJECT). Also, it doesn't support objects fetched partly | |
1973 | from one target and partly from another (in a different stratum, | |
1974 | e.g. a core file and an executable). Both reasons make it | |
1975 | unsuitable for reading memory. */ | |
1976 | gdb_assert (object != TARGET_OBJECT_MEMORY); | |
1977 | ||
1978 | /* Start by reading up to 4K at a time. The target will throttle | |
1979 | this number down if necessary. */ | |
1980 | buf_alloc = 4096; | |
224c3ddb | 1981 | buf = (gdb_byte *) xmalloc (buf_alloc); |
13547ab6 DJ |
1982 | buf_pos = 0; |
1983 | while (1) | |
1984 | { | |
9b409511 YQ |
1985 | ULONGEST xfered_len; |
1986 | enum target_xfer_status status; | |
1987 | ||
1988 | status = target_read_partial (ops, object, annex, &buf[buf_pos], | |
1989 | buf_pos, buf_alloc - buf_pos - padding, | |
1990 | &xfered_len); | |
1991 | ||
1992 | if (status == TARGET_XFER_EOF) | |
13547ab6 DJ |
1993 | { |
1994 | /* Read all there was. */ | |
1995 | if (buf_pos == 0) | |
1996 | xfree (buf); | |
1997 | else | |
1998 | *buf_p = buf; | |
1999 | return buf_pos; | |
2000 | } | |
9b409511 YQ |
2001 | else if (status != TARGET_XFER_OK) |
2002 | { | |
2003 | /* An error occurred. */ | |
2004 | xfree (buf); | |
2005 | return TARGET_XFER_E_IO; | |
2006 | } | |
13547ab6 | 2007 | |
9b409511 | 2008 | buf_pos += xfered_len; |
13547ab6 DJ |
2009 | |
2010 | /* If the buffer is filling up, expand it. */ | |
2011 | if (buf_alloc < buf_pos * 2) | |
2012 | { | |
2013 | buf_alloc *= 2; | |
224c3ddb | 2014 | buf = (gdb_byte *) xrealloc (buf, buf_alloc); |
13547ab6 DJ |
2015 | } |
2016 | ||
2017 | QUIT; | |
2018 | } | |
2019 | } | |
2020 | ||
159f81f3 DJ |
2021 | /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return |
2022 | the size of the transferred data. See the declaration in "target.h" | |
2023 | function for more information about the return value. */ | |
2024 | ||
2025 | LONGEST | |
2026 | target_read_alloc (struct target_ops *ops, enum target_object object, | |
2027 | const char *annex, gdb_byte **buf_p) | |
2028 | { | |
2029 | return target_read_alloc_1 (ops, object, annex, buf_p, 0); | |
2030 | } | |
2031 | ||
2032 | /* Read OBJECT/ANNEX using OPS. The result is NUL-terminated and | |
2033 | returned as a string, allocated using xmalloc. If an error occurs | |
2034 | or the transfer is unsupported, NULL is returned. Empty objects | |
2035 | are returned as allocated but empty strings. A warning is issued | |
2036 | if the result contains any embedded NUL bytes. */ | |
2037 | ||
2038 | char * | |
2039 | target_read_stralloc (struct target_ops *ops, enum target_object object, | |
2040 | const char *annex) | |
2041 | { | |
39086a0e PA |
2042 | gdb_byte *buffer; |
2043 | char *bufstr; | |
7313baad | 2044 | LONGEST i, transferred; |
159f81f3 | 2045 | |
39086a0e PA |
2046 | transferred = target_read_alloc_1 (ops, object, annex, &buffer, 1); |
2047 | bufstr = (char *) buffer; | |
159f81f3 DJ |
2048 | |
2049 | if (transferred < 0) | |
2050 | return NULL; | |
2051 | ||
2052 | if (transferred == 0) | |
2053 | return xstrdup (""); | |
2054 | ||
39086a0e | 2055 | bufstr[transferred] = 0; |
7313baad UW |
2056 | |
2057 | /* Check for embedded NUL bytes; but allow trailing NULs. */ | |
39086a0e PA |
2058 | for (i = strlen (bufstr); i < transferred; i++) |
2059 | if (bufstr[i] != 0) | |
7313baad UW |
2060 | { |
2061 | warning (_("target object %d, annex %s, " | |
2062 | "contained unexpected null characters"), | |
2063 | (int) object, annex ? annex : "(none)"); | |
2064 | break; | |
2065 | } | |
159f81f3 | 2066 | |
39086a0e | 2067 | return bufstr; |
159f81f3 DJ |
2068 | } |
2069 | ||
b6591e8b AC |
2070 | /* Memory transfer methods. */ |
2071 | ||
2072 | void | |
1b0ba102 | 2073 | get_target_memory (struct target_ops *ops, CORE_ADDR addr, gdb_byte *buf, |
b6591e8b AC |
2074 | LONGEST len) |
2075 | { | |
07b82ea5 PA |
2076 | /* This method is used to read from an alternate, non-current |
2077 | target. This read must bypass the overlay support (as symbols | |
2078 | don't match this target), and GDB's internal cache (wrong cache | |
2079 | for this target). */ | |
2080 | if (target_read (ops, TARGET_OBJECT_RAW_MEMORY, NULL, buf, addr, len) | |
b6591e8b | 2081 | != len) |
578d3588 | 2082 | memory_error (TARGET_XFER_E_IO, addr); |
b6591e8b AC |
2083 | } |
2084 | ||
2085 | ULONGEST | |
5d502164 MS |
2086 | get_target_memory_unsigned (struct target_ops *ops, CORE_ADDR addr, |
2087 | int len, enum bfd_endian byte_order) | |
b6591e8b | 2088 | { |
f6519ebc | 2089 | gdb_byte buf[sizeof (ULONGEST)]; |
b6591e8b AC |
2090 | |
2091 | gdb_assert (len <= sizeof (buf)); | |
2092 | get_target_memory (ops, addr, buf, len); | |
e17a4113 | 2093 | return extract_unsigned_integer (buf, len, byte_order); |
b6591e8b AC |
2094 | } |
2095 | ||
3db08215 MM |
2096 | /* See target.h. */ |
2097 | ||
d914c394 SS |
2098 | int |
2099 | target_insert_breakpoint (struct gdbarch *gdbarch, | |
2100 | struct bp_target_info *bp_tgt) | |
2101 | { | |
2102 | if (!may_insert_breakpoints) | |
2103 | { | |
2104 | warning (_("May not insert breakpoints")); | |
2105 | return 1; | |
2106 | } | |
2107 | ||
6b84065d TT |
2108 | return current_target.to_insert_breakpoint (¤t_target, |
2109 | gdbarch, bp_tgt); | |
d914c394 SS |
2110 | } |
2111 | ||
3db08215 MM |
2112 | /* See target.h. */ |
2113 | ||
d914c394 | 2114 | int |
6b84065d | 2115 | target_remove_breakpoint (struct gdbarch *gdbarch, |
73971819 PA |
2116 | struct bp_target_info *bp_tgt, |
2117 | enum remove_bp_reason reason) | |
d914c394 SS |
2118 | { |
2119 | /* This is kind of a weird case to handle, but the permission might | |
2120 | have been changed after breakpoints were inserted - in which case | |
2121 | we should just take the user literally and assume that any | |
2122 | breakpoints should be left in place. */ | |
2123 | if (!may_insert_breakpoints) | |
2124 | { | |
2125 | warning (_("May not remove breakpoints")); | |
2126 | return 1; | |
2127 | } | |
2128 | ||
6b84065d | 2129 | return current_target.to_remove_breakpoint (¤t_target, |
73971819 | 2130 | gdbarch, bp_tgt, reason); |
d914c394 SS |
2131 | } |
2132 | ||
c906108c | 2133 | static void |
fba45db2 | 2134 | target_info (char *args, int from_tty) |
c906108c SS |
2135 | { |
2136 | struct target_ops *t; | |
c906108c | 2137 | int has_all_mem = 0; |
c5aa993b | 2138 | |
c906108c | 2139 | if (symfile_objfile != NULL) |
4262abfb JK |
2140 | printf_unfiltered (_("Symbols from \"%s\".\n"), |
2141 | objfile_name (symfile_objfile)); | |
c906108c | 2142 | |
258b763a | 2143 | for (t = target_stack; t != NULL; t = t->beneath) |
c906108c | 2144 | { |
c35b1492 | 2145 | if (!(*t->to_has_memory) (t)) |
c906108c SS |
2146 | continue; |
2147 | ||
c5aa993b | 2148 | if ((int) (t->to_stratum) <= (int) dummy_stratum) |
c906108c SS |
2149 | continue; |
2150 | if (has_all_mem) | |
3e43a32a MS |
2151 | printf_unfiltered (_("\tWhile running this, " |
2152 | "GDB does not access memory from...\n")); | |
c5aa993b JM |
2153 | printf_unfiltered ("%s:\n", t->to_longname); |
2154 | (t->to_files_info) (t); | |
c35b1492 | 2155 | has_all_mem = (*t->to_has_all_memory) (t); |
c906108c SS |
2156 | } |
2157 | } | |
2158 | ||
fd79ecee DJ |
2159 | /* This function is called before any new inferior is created, e.g. |
2160 | by running a program, attaching, or connecting to a target. | |
2161 | It cleans up any state from previous invocations which might | |
2162 | change between runs. This is a subset of what target_preopen | |
2163 | resets (things which might change between targets). */ | |
2164 | ||
2165 | void | |
2166 | target_pre_inferior (int from_tty) | |
2167 | { | |
c378eb4e | 2168 | /* Clear out solib state. Otherwise the solib state of the previous |
b9db4ced | 2169 | inferior might have survived and is entirely wrong for the new |
c378eb4e | 2170 | target. This has been observed on GNU/Linux using glibc 2.3. How |
b9db4ced UW |
2171 | to reproduce: |
2172 | ||
2173 | bash$ ./foo& | |
2174 | [1] 4711 | |
2175 | bash$ ./foo& | |
2176 | [1] 4712 | |
2177 | bash$ gdb ./foo | |
2178 | [...] | |
2179 | (gdb) attach 4711 | |
2180 | (gdb) detach | |
2181 | (gdb) attach 4712 | |
2182 | Cannot access memory at address 0xdeadbeef | |
2183 | */ | |
b9db4ced | 2184 | |
50c71eaf PA |
2185 | /* In some OSs, the shared library list is the same/global/shared |
2186 | across inferiors. If code is shared between processes, so are | |
2187 | memory regions and features. */ | |
f5656ead | 2188 | if (!gdbarch_has_global_solist (target_gdbarch ())) |
50c71eaf PA |
2189 | { |
2190 | no_shared_libraries (NULL, from_tty); | |
2191 | ||
2192 | invalidate_target_mem_regions (); | |
424163ea | 2193 | |
50c71eaf PA |
2194 | target_clear_description (); |
2195 | } | |
8ffcbaaf | 2196 | |
e9756d52 PP |
2197 | /* attach_flag may be set if the previous process associated with |
2198 | the inferior was attached to. */ | |
2199 | current_inferior ()->attach_flag = 0; | |
2200 | ||
5d5658a1 PA |
2201 | current_inferior ()->highest_thread_num = 0; |
2202 | ||
8ffcbaaf | 2203 | agent_capability_invalidate (); |
fd79ecee DJ |
2204 | } |
2205 | ||
b8fa0bfa PA |
2206 | /* Callback for iterate_over_inferiors. Gets rid of the given |
2207 | inferior. */ | |
2208 | ||
2209 | static int | |
2210 | dispose_inferior (struct inferior *inf, void *args) | |
2211 | { | |
2212 | struct thread_info *thread; | |
2213 | ||
2214 | thread = any_thread_of_process (inf->pid); | |
2215 | if (thread) | |
2216 | { | |
2217 | switch_to_thread (thread->ptid); | |
2218 | ||
2219 | /* Core inferiors actually should be detached, not killed. */ | |
2220 | if (target_has_execution) | |
2221 | target_kill (); | |
2222 | else | |
2223 | target_detach (NULL, 0); | |
2224 | } | |
2225 | ||
2226 | return 0; | |
2227 | } | |
2228 | ||
c906108c SS |
2229 | /* This is to be called by the open routine before it does |
2230 | anything. */ | |
2231 | ||
2232 | void | |
fba45db2 | 2233 | target_preopen (int from_tty) |
c906108c | 2234 | { |
c5aa993b | 2235 | dont_repeat (); |
c906108c | 2236 | |
b8fa0bfa | 2237 | if (have_inferiors ()) |
c5aa993b | 2238 | { |
adf40b2e | 2239 | if (!from_tty |
b8fa0bfa PA |
2240 | || !have_live_inferiors () |
2241 | || query (_("A program is being debugged already. Kill it? "))) | |
2242 | iterate_over_inferiors (dispose_inferior, NULL); | |
c906108c | 2243 | else |
8a3fe4f8 | 2244 | error (_("Program not killed.")); |
c906108c SS |
2245 | } |
2246 | ||
2247 | /* Calling target_kill may remove the target from the stack. But if | |
2248 | it doesn't (which seems like a win for UDI), remove it now. */ | |
87ab71f0 PA |
2249 | /* Leave the exec target, though. The user may be switching from a |
2250 | live process to a core of the same program. */ | |
460014f5 | 2251 | pop_all_targets_above (file_stratum); |
fd79ecee DJ |
2252 | |
2253 | target_pre_inferior (from_tty); | |
c906108c SS |
2254 | } |
2255 | ||
2256 | /* Detach a target after doing deferred register stores. */ | |
2257 | ||
2258 | void | |
52554a0e | 2259 | target_detach (const char *args, int from_tty) |
c906108c | 2260 | { |
f5656ead | 2261 | if (gdbarch_has_global_breakpoints (target_gdbarch ())) |
50c71eaf PA |
2262 | /* Don't remove global breakpoints here. They're removed on |
2263 | disconnection from the target. */ | |
2264 | ; | |
2265 | else | |
2266 | /* If we're in breakpoints-always-inserted mode, have to remove | |
2267 | them before detaching. */ | |
dfd4cc63 | 2268 | remove_breakpoints_pid (ptid_get_pid (inferior_ptid)); |
74960c60 | 2269 | |
24291992 PA |
2270 | prepare_for_detach (); |
2271 | ||
09da0d0a | 2272 | current_target.to_detach (¤t_target, args, from_tty); |
c906108c SS |
2273 | } |
2274 | ||
6ad8ae5c | 2275 | void |
fee354ee | 2276 | target_disconnect (const char *args, int from_tty) |
6ad8ae5c | 2277 | { |
50c71eaf PA |
2278 | /* If we're in breakpoints-always-inserted mode or if breakpoints |
2279 | are global across processes, we have to remove them before | |
2280 | disconnecting. */ | |
74960c60 VP |
2281 | remove_breakpoints (); |
2282 | ||
86a0854a | 2283 | current_target.to_disconnect (¤t_target, args, from_tty); |
6ad8ae5c DJ |
2284 | } |
2285 | ||
117de6a9 | 2286 | ptid_t |
47608cb1 | 2287 | target_wait (ptid_t ptid, struct target_waitstatus *status, int options) |
117de6a9 | 2288 | { |
a7068b60 | 2289 | return (current_target.to_wait) (¤t_target, ptid, status, options); |
117de6a9 PA |
2290 | } |
2291 | ||
0b333c5e PA |
2292 | /* See target.h. */ |
2293 | ||
2294 | ptid_t | |
2295 | default_target_wait (struct target_ops *ops, | |
2296 | ptid_t ptid, struct target_waitstatus *status, | |
2297 | int options) | |
2298 | { | |
2299 | status->kind = TARGET_WAITKIND_IGNORE; | |
2300 | return minus_one_ptid; | |
2301 | } | |
2302 | ||
117de6a9 PA |
2303 | char * |
2304 | target_pid_to_str (ptid_t ptid) | |
2305 | { | |
770234d3 | 2306 | return (*current_target.to_pid_to_str) (¤t_target, ptid); |
117de6a9 PA |
2307 | } |
2308 | ||
73ede765 | 2309 | const char * |
4694da01 TT |
2310 | target_thread_name (struct thread_info *info) |
2311 | { | |
825828fc | 2312 | return current_target.to_thread_name (¤t_target, info); |
4694da01 TT |
2313 | } |
2314 | ||
e1ac3328 | 2315 | void |
2ea28649 | 2316 | target_resume (ptid_t ptid, int step, enum gdb_signal signal) |
e1ac3328 | 2317 | { |
4e5d721f | 2318 | target_dcache_invalidate (); |
28439f5e | 2319 | |
6b84065d | 2320 | current_target.to_resume (¤t_target, ptid, step, signal); |
28439f5e | 2321 | |
6b84065d | 2322 | registers_changed_ptid (ptid); |
251bde03 PA |
2323 | /* We only set the internal executing state here. The user/frontend |
2324 | running state is set at a higher level. */ | |
6b84065d | 2325 | set_executing (ptid, 1); |
6b84065d | 2326 | clear_inline_frame_state (ptid); |
e1ac3328 | 2327 | } |
2455069d UW |
2328 | |
2329 | void | |
2330 | target_pass_signals (int numsigs, unsigned char *pass_signals) | |
2331 | { | |
035cad7f | 2332 | (*current_target.to_pass_signals) (¤t_target, numsigs, pass_signals); |
2455069d UW |
2333 | } |
2334 | ||
9b224c5e PA |
2335 | void |
2336 | target_program_signals (int numsigs, unsigned char *program_signals) | |
2337 | { | |
7d4f8efa TT |
2338 | (*current_target.to_program_signals) (¤t_target, |
2339 | numsigs, program_signals); | |
9b224c5e PA |
2340 | } |
2341 | ||
098dba18 TT |
2342 | static int |
2343 | default_follow_fork (struct target_ops *self, int follow_child, | |
2344 | int detach_fork) | |
2345 | { | |
2346 | /* Some target returned a fork event, but did not know how to follow it. */ | |
2347 | internal_error (__FILE__, __LINE__, | |
2348 | _("could not find a target to follow fork")); | |
2349 | } | |
2350 | ||
ee057212 DJ |
2351 | /* Look through the list of possible targets for a target that can |
2352 | follow forks. */ | |
2353 | ||
2354 | int | |
07107ca6 | 2355 | target_follow_fork (int follow_child, int detach_fork) |
ee057212 | 2356 | { |
a7068b60 TT |
2357 | return current_target.to_follow_fork (¤t_target, |
2358 | follow_child, detach_fork); | |
ee057212 DJ |
2359 | } |
2360 | ||
94585166 DB |
2361 | /* Target wrapper for follow exec hook. */ |
2362 | ||
2363 | void | |
2364 | target_follow_exec (struct inferior *inf, char *execd_pathname) | |
2365 | { | |
2366 | current_target.to_follow_exec (¤t_target, inf, execd_pathname); | |
2367 | } | |
2368 | ||
8d657035 TT |
2369 | static void |
2370 | default_mourn_inferior (struct target_ops *self) | |
2371 | { | |
2372 | internal_error (__FILE__, __LINE__, | |
2373 | _("could not find a target to follow mourn inferior")); | |
2374 | } | |
2375 | ||
136d6dae VP |
2376 | void |
2377 | target_mourn_inferior (void) | |
2378 | { | |
8d657035 | 2379 | current_target.to_mourn_inferior (¤t_target); |
136d6dae | 2380 | |
8d657035 TT |
2381 | /* We no longer need to keep handles on any of the object files. |
2382 | Make sure to release them to avoid unnecessarily locking any | |
2383 | of them while we're not actually debugging. */ | |
2384 | bfd_cache_close_all (); | |
136d6dae VP |
2385 | } |
2386 | ||
424163ea DJ |
2387 | /* Look for a target which can describe architectural features, starting |
2388 | from TARGET. If we find one, return its description. */ | |
2389 | ||
2390 | const struct target_desc * | |
2391 | target_read_description (struct target_ops *target) | |
2392 | { | |
2117c711 | 2393 | return target->to_read_description (target); |
424163ea DJ |
2394 | } |
2395 | ||
58a5184e | 2396 | /* This implements a basic search of memory, reading target memory and |
08388c79 DE |
2397 | performing the search here (as opposed to performing the search in on the |
2398 | target side with, for example, gdbserver). */ | |
2399 | ||
2400 | int | |
2401 | simple_search_memory (struct target_ops *ops, | |
2402 | CORE_ADDR start_addr, ULONGEST search_space_len, | |
2403 | const gdb_byte *pattern, ULONGEST pattern_len, | |
2404 | CORE_ADDR *found_addrp) | |
2405 | { | |
2406 | /* NOTE: also defined in find.c testcase. */ | |
2407 | #define SEARCH_CHUNK_SIZE 16000 | |
2408 | const unsigned chunk_size = SEARCH_CHUNK_SIZE; | |
2409 | /* Buffer to hold memory contents for searching. */ | |
2410 | gdb_byte *search_buf; | |
2411 | unsigned search_buf_size; | |
2412 | struct cleanup *old_cleanups; | |
2413 | ||
2414 | search_buf_size = chunk_size + pattern_len - 1; | |
2415 | ||
2416 | /* No point in trying to allocate a buffer larger than the search space. */ | |
2417 | if (search_space_len < search_buf_size) | |
2418 | search_buf_size = search_space_len; | |
2419 | ||
224c3ddb | 2420 | search_buf = (gdb_byte *) malloc (search_buf_size); |
08388c79 | 2421 | if (search_buf == NULL) |
5e1471f5 | 2422 | error (_("Unable to allocate memory to perform the search.")); |
08388c79 DE |
2423 | old_cleanups = make_cleanup (free_current_contents, &search_buf); |
2424 | ||
2425 | /* Prime the search buffer. */ | |
2426 | ||
2427 | if (target_read (ops, TARGET_OBJECT_MEMORY, NULL, | |
2428 | search_buf, start_addr, search_buf_size) != search_buf_size) | |
2429 | { | |
b3dc46ff AB |
2430 | warning (_("Unable to access %s bytes of target " |
2431 | "memory at %s, halting search."), | |
2432 | pulongest (search_buf_size), hex_string (start_addr)); | |
08388c79 DE |
2433 | do_cleanups (old_cleanups); |
2434 | return -1; | |
2435 | } | |
2436 | ||
2437 | /* Perform the search. | |
2438 | ||
2439 | The loop is kept simple by allocating [N + pattern-length - 1] bytes. | |
2440 | When we've scanned N bytes we copy the trailing bytes to the start and | |
2441 | read in another N bytes. */ | |
2442 | ||
2443 | while (search_space_len >= pattern_len) | |
2444 | { | |
2445 | gdb_byte *found_ptr; | |
2446 | unsigned nr_search_bytes = min (search_space_len, search_buf_size); | |
2447 | ||
d7f3ff3e SM |
2448 | found_ptr = (gdb_byte *) memmem (search_buf, nr_search_bytes, |
2449 | pattern, pattern_len); | |
08388c79 DE |
2450 | |
2451 | if (found_ptr != NULL) | |
2452 | { | |
2453 | CORE_ADDR found_addr = start_addr + (found_ptr - search_buf); | |
5d502164 | 2454 | |
08388c79 DE |
2455 | *found_addrp = found_addr; |
2456 | do_cleanups (old_cleanups); | |
2457 | return 1; | |
2458 | } | |
2459 | ||
2460 | /* Not found in this chunk, skip to next chunk. */ | |
2461 | ||
2462 | /* Don't let search_space_len wrap here, it's unsigned. */ | |
2463 | if (search_space_len >= chunk_size) | |
2464 | search_space_len -= chunk_size; | |
2465 | else | |
2466 | search_space_len = 0; | |
2467 | ||
2468 | if (search_space_len >= pattern_len) | |
2469 | { | |
2470 | unsigned keep_len = search_buf_size - chunk_size; | |
8a35fb51 | 2471 | CORE_ADDR read_addr = start_addr + chunk_size + keep_len; |
08388c79 DE |
2472 | int nr_to_read; |
2473 | ||
2474 | /* Copy the trailing part of the previous iteration to the front | |
2475 | of the buffer for the next iteration. */ | |
2476 | gdb_assert (keep_len == pattern_len - 1); | |
2477 | memcpy (search_buf, search_buf + chunk_size, keep_len); | |
2478 | ||
2479 | nr_to_read = min (search_space_len - keep_len, chunk_size); | |
2480 | ||
2481 | if (target_read (ops, TARGET_OBJECT_MEMORY, NULL, | |
2482 | search_buf + keep_len, read_addr, | |
2483 | nr_to_read) != nr_to_read) | |
2484 | { | |
b3dc46ff | 2485 | warning (_("Unable to access %s bytes of target " |
9b20d036 | 2486 | "memory at %s, halting search."), |
b3dc46ff | 2487 | plongest (nr_to_read), |
08388c79 DE |
2488 | hex_string (read_addr)); |
2489 | do_cleanups (old_cleanups); | |
2490 | return -1; | |
2491 | } | |
2492 | ||
2493 | start_addr += chunk_size; | |
2494 | } | |
2495 | } | |
2496 | ||
2497 | /* Not found. */ | |
2498 | ||
2499 | do_cleanups (old_cleanups); | |
2500 | return 0; | |
2501 | } | |
2502 | ||
58a5184e TT |
2503 | /* Default implementation of memory-searching. */ |
2504 | ||
2505 | static int | |
2506 | default_search_memory (struct target_ops *self, | |
2507 | CORE_ADDR start_addr, ULONGEST search_space_len, | |
2508 | const gdb_byte *pattern, ULONGEST pattern_len, | |
2509 | CORE_ADDR *found_addrp) | |
2510 | { | |
2511 | /* Start over from the top of the target stack. */ | |
2512 | return simple_search_memory (current_target.beneath, | |
2513 | start_addr, search_space_len, | |
2514 | pattern, pattern_len, found_addrp); | |
2515 | } | |
2516 | ||
08388c79 DE |
2517 | /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the |
2518 | sequence of bytes in PATTERN with length PATTERN_LEN. | |
2519 | ||
2520 | The result is 1 if found, 0 if not found, and -1 if there was an error | |
2521 | requiring halting of the search (e.g. memory read error). | |
2522 | If the pattern is found the address is recorded in FOUND_ADDRP. */ | |
2523 | ||
2524 | int | |
2525 | target_search_memory (CORE_ADDR start_addr, ULONGEST search_space_len, | |
2526 | const gdb_byte *pattern, ULONGEST pattern_len, | |
2527 | CORE_ADDR *found_addrp) | |
2528 | { | |
a7068b60 TT |
2529 | return current_target.to_search_memory (¤t_target, start_addr, |
2530 | search_space_len, | |
2531 | pattern, pattern_len, found_addrp); | |
08388c79 DE |
2532 | } |
2533 | ||
8edfe269 DJ |
2534 | /* Look through the currently pushed targets. If none of them will |
2535 | be able to restart the currently running process, issue an error | |
2536 | message. */ | |
2537 | ||
2538 | void | |
2539 | target_require_runnable (void) | |
2540 | { | |
2541 | struct target_ops *t; | |
2542 | ||
2543 | for (t = target_stack; t != NULL; t = t->beneath) | |
2544 | { | |
2545 | /* If this target knows how to create a new program, then | |
2546 | assume we will still be able to after killing the current | |
2547 | one. Either killing and mourning will not pop T, or else | |
2548 | find_default_run_target will find it again. */ | |
2549 | if (t->to_create_inferior != NULL) | |
2550 | return; | |
2551 | ||
548740d6 | 2552 | /* Do not worry about targets at certain strata that can not |
8edfe269 DJ |
2553 | create inferiors. Assume they will be pushed again if |
2554 | necessary, and continue to the process_stratum. */ | |
85e747d2 | 2555 | if (t->to_stratum == thread_stratum |
548740d6 | 2556 | || t->to_stratum == record_stratum |
85e747d2 | 2557 | || t->to_stratum == arch_stratum) |
8edfe269 DJ |
2558 | continue; |
2559 | ||
3e43a32a MS |
2560 | error (_("The \"%s\" target does not support \"run\". " |
2561 | "Try \"help target\" or \"continue\"."), | |
8edfe269 DJ |
2562 | t->to_shortname); |
2563 | } | |
2564 | ||
2565 | /* This function is only called if the target is running. In that | |
2566 | case there should have been a process_stratum target and it | |
c378eb4e | 2567 | should either know how to create inferiors, or not... */ |
9b20d036 | 2568 | internal_error (__FILE__, __LINE__, _("No targets found")); |
8edfe269 DJ |
2569 | } |
2570 | ||
6a3cb8e8 PA |
2571 | /* Whether GDB is allowed to fall back to the default run target for |
2572 | "run", "attach", etc. when no target is connected yet. */ | |
2573 | static int auto_connect_native_target = 1; | |
2574 | ||
2575 | static void | |
2576 | show_auto_connect_native_target (struct ui_file *file, int from_tty, | |
2577 | struct cmd_list_element *c, const char *value) | |
2578 | { | |
2579 | fprintf_filtered (file, | |
2580 | _("Whether GDB may automatically connect to the " | |
2581 | "native target is %s.\n"), | |
2582 | value); | |
2583 | } | |
2584 | ||
c906108c SS |
2585 | /* Look through the list of possible targets for a target that can |
2586 | execute a run or attach command without any other data. This is | |
2587 | used to locate the default process stratum. | |
2588 | ||
5f667f2d PA |
2589 | If DO_MESG is not NULL, the result is always valid (error() is |
2590 | called for errors); else, return NULL on error. */ | |
c906108c SS |
2591 | |
2592 | static struct target_ops * | |
fba45db2 | 2593 | find_default_run_target (char *do_mesg) |
c906108c | 2594 | { |
c906108c | 2595 | struct target_ops *runable = NULL; |
c906108c | 2596 | |
6a3cb8e8 | 2597 | if (auto_connect_native_target) |
c906108c | 2598 | { |
89a1c21a | 2599 | struct target_ops *t; |
6a3cb8e8 | 2600 | int count = 0; |
89a1c21a | 2601 | int i; |
6a3cb8e8 | 2602 | |
89a1c21a | 2603 | for (i = 0; VEC_iterate (target_ops_p, target_structs, i, t); ++i) |
c906108c | 2604 | { |
89a1c21a | 2605 | if (t->to_can_run != delegate_can_run && target_can_run (t)) |
6a3cb8e8 | 2606 | { |
89a1c21a | 2607 | runable = t; |
6a3cb8e8 PA |
2608 | ++count; |
2609 | } | |
c906108c | 2610 | } |
6a3cb8e8 PA |
2611 | |
2612 | if (count != 1) | |
2613 | runable = NULL; | |
c906108c SS |
2614 | } |
2615 | ||
6a3cb8e8 | 2616 | if (runable == NULL) |
5f667f2d PA |
2617 | { |
2618 | if (do_mesg) | |
2619 | error (_("Don't know how to %s. Try \"help target\"."), do_mesg); | |
2620 | else | |
2621 | return NULL; | |
2622 | } | |
c906108c SS |
2623 | |
2624 | return runable; | |
2625 | } | |
2626 | ||
b3ccfe11 | 2627 | /* See target.h. */ |
c906108c | 2628 | |
b3ccfe11 TT |
2629 | struct target_ops * |
2630 | find_attach_target (void) | |
c906108c SS |
2631 | { |
2632 | struct target_ops *t; | |
2633 | ||
b3ccfe11 TT |
2634 | /* If a target on the current stack can attach, use it. */ |
2635 | for (t = current_target.beneath; t != NULL; t = t->beneath) | |
2636 | { | |
2637 | if (t->to_attach != NULL) | |
2638 | break; | |
2639 | } | |
c906108c | 2640 | |
b3ccfe11 TT |
2641 | /* Otherwise, use the default run target for attaching. */ |
2642 | if (t == NULL) | |
2643 | t = find_default_run_target ("attach"); | |
b84876c2 | 2644 | |
b3ccfe11 | 2645 | return t; |
b84876c2 PA |
2646 | } |
2647 | ||
b3ccfe11 | 2648 | /* See target.h. */ |
b84876c2 | 2649 | |
b3ccfe11 TT |
2650 | struct target_ops * |
2651 | find_run_target (void) | |
9908b566 VP |
2652 | { |
2653 | struct target_ops *t; | |
2654 | ||
b3ccfe11 TT |
2655 | /* If a target on the current stack can attach, use it. */ |
2656 | for (t = current_target.beneath; t != NULL; t = t->beneath) | |
2657 | { | |
2658 | if (t->to_create_inferior != NULL) | |
2659 | break; | |
2660 | } | |
5d502164 | 2661 | |
b3ccfe11 TT |
2662 | /* Otherwise, use the default run target. */ |
2663 | if (t == NULL) | |
2664 | t = find_default_run_target ("run"); | |
9908b566 | 2665 | |
b3ccfe11 | 2666 | return t; |
9908b566 VP |
2667 | } |
2668 | ||
145b16a9 UW |
2669 | /* Implement the "info proc" command. */ |
2670 | ||
451b7c33 | 2671 | int |
7bc112c1 | 2672 | target_info_proc (const char *args, enum info_proc_what what) |
145b16a9 UW |
2673 | { |
2674 | struct target_ops *t; | |
2675 | ||
2676 | /* If we're already connected to something that can get us OS | |
2677 | related data, use it. Otherwise, try using the native | |
2678 | target. */ | |
2679 | if (current_target.to_stratum >= process_stratum) | |
2680 | t = current_target.beneath; | |
2681 | else | |
2682 | t = find_default_run_target (NULL); | |
2683 | ||
2684 | for (; t != NULL; t = t->beneath) | |
2685 | { | |
2686 | if (t->to_info_proc != NULL) | |
2687 | { | |
2688 | t->to_info_proc (t, args, what); | |
2689 | ||
2690 | if (targetdebug) | |
2691 | fprintf_unfiltered (gdb_stdlog, | |
2692 | "target_info_proc (\"%s\", %d)\n", args, what); | |
2693 | ||
451b7c33 | 2694 | return 1; |
145b16a9 UW |
2695 | } |
2696 | } | |
2697 | ||
451b7c33 | 2698 | return 0; |
145b16a9 UW |
2699 | } |
2700 | ||
03583c20 | 2701 | static int |
2bfc0540 | 2702 | find_default_supports_disable_randomization (struct target_ops *self) |
03583c20 UW |
2703 | { |
2704 | struct target_ops *t; | |
2705 | ||
2706 | t = find_default_run_target (NULL); | |
2707 | if (t && t->to_supports_disable_randomization) | |
2bfc0540 | 2708 | return (t->to_supports_disable_randomization) (t); |
03583c20 UW |
2709 | return 0; |
2710 | } | |
2711 | ||
2712 | int | |
2713 | target_supports_disable_randomization (void) | |
2714 | { | |
2715 | struct target_ops *t; | |
2716 | ||
2717 | for (t = ¤t_target; t != NULL; t = t->beneath) | |
2718 | if (t->to_supports_disable_randomization) | |
2bfc0540 | 2719 | return t->to_supports_disable_randomization (t); |
03583c20 UW |
2720 | |
2721 | return 0; | |
2722 | } | |
9908b566 | 2723 | |
07e059b5 VP |
2724 | char * |
2725 | target_get_osdata (const char *type) | |
2726 | { | |
07e059b5 VP |
2727 | struct target_ops *t; |
2728 | ||
739ef7fb PA |
2729 | /* If we're already connected to something that can get us OS |
2730 | related data, use it. Otherwise, try using the native | |
2731 | target. */ | |
2732 | if (current_target.to_stratum >= process_stratum) | |
6d097e65 | 2733 | t = current_target.beneath; |
739ef7fb PA |
2734 | else |
2735 | t = find_default_run_target ("get OS data"); | |
07e059b5 VP |
2736 | |
2737 | if (!t) | |
2738 | return NULL; | |
2739 | ||
6d097e65 | 2740 | return target_read_stralloc (t, TARGET_OBJECT_OSDATA, type); |
07e059b5 VP |
2741 | } |
2742 | ||
8eaff7cd TT |
2743 | static struct address_space * |
2744 | default_thread_address_space (struct target_ops *self, ptid_t ptid) | |
6c95b8df PA |
2745 | { |
2746 | struct inferior *inf; | |
6c95b8df PA |
2747 | |
2748 | /* Fall-back to the "main" address space of the inferior. */ | |
c9657e70 | 2749 | inf = find_inferior_ptid (ptid); |
6c95b8df PA |
2750 | |
2751 | if (inf == NULL || inf->aspace == NULL) | |
3e43a32a | 2752 | internal_error (__FILE__, __LINE__, |
9b20d036 MS |
2753 | _("Can't determine the current " |
2754 | "address space of thread %s\n"), | |
6c95b8df PA |
2755 | target_pid_to_str (ptid)); |
2756 | ||
2757 | return inf->aspace; | |
2758 | } | |
2759 | ||
8eaff7cd TT |
2760 | /* Determine the current address space of thread PTID. */ |
2761 | ||
2762 | struct address_space * | |
2763 | target_thread_address_space (ptid_t ptid) | |
2764 | { | |
2765 | struct address_space *aspace; | |
2766 | ||
2767 | aspace = current_target.to_thread_address_space (¤t_target, ptid); | |
2768 | gdb_assert (aspace != NULL); | |
2769 | ||
8eaff7cd TT |
2770 | return aspace; |
2771 | } | |
2772 | ||
7313baad UW |
2773 | |
2774 | /* Target file operations. */ | |
2775 | ||
2776 | static struct target_ops * | |
2777 | default_fileio_target (void) | |
2778 | { | |
2779 | /* If we're already connected to something that can perform | |
2780 | file I/O, use it. Otherwise, try using the native target. */ | |
2781 | if (current_target.to_stratum >= process_stratum) | |
2782 | return current_target.beneath; | |
2783 | else | |
2784 | return find_default_run_target ("file I/O"); | |
2785 | } | |
2786 | ||
1c4b552b GB |
2787 | /* File handle for target file operations. */ |
2788 | ||
2789 | typedef struct | |
2790 | { | |
2791 | /* The target on which this file is open. */ | |
2792 | struct target_ops *t; | |
2793 | ||
2794 | /* The file descriptor on the target. */ | |
2795 | int fd; | |
2796 | } fileio_fh_t; | |
2797 | ||
2798 | DEF_VEC_O (fileio_fh_t); | |
2799 | ||
2800 | /* Vector of currently open file handles. The value returned by | |
2801 | target_fileio_open and passed as the FD argument to other | |
2802 | target_fileio_* functions is an index into this vector. This | |
2803 | vector's entries are never freed; instead, files are marked as | |
2804 | closed, and the handle becomes available for reuse. */ | |
2805 | static VEC (fileio_fh_t) *fileio_fhandles; | |
2806 | ||
2807 | /* Macro to check whether a fileio_fh_t represents a closed file. */ | |
2808 | #define is_closed_fileio_fh(fd) ((fd) < 0) | |
2809 | ||
2810 | /* Index into fileio_fhandles of the lowest handle that might be | |
2811 | closed. This permits handle reuse without searching the whole | |
2812 | list each time a new file is opened. */ | |
2813 | static int lowest_closed_fd; | |
2814 | ||
2815 | /* Acquire a target fileio file descriptor. */ | |
2816 | ||
2817 | static int | |
2818 | acquire_fileio_fd (struct target_ops *t, int fd) | |
2819 | { | |
870f88f7 | 2820 | fileio_fh_t *fh; |
1c4b552b GB |
2821 | |
2822 | gdb_assert (!is_closed_fileio_fh (fd)); | |
2823 | ||
2824 | /* Search for closed handles to reuse. */ | |
2825 | for (; | |
2826 | VEC_iterate (fileio_fh_t, fileio_fhandles, | |
2827 | lowest_closed_fd, fh); | |
2828 | lowest_closed_fd++) | |
2829 | if (is_closed_fileio_fh (fh->fd)) | |
2830 | break; | |
2831 | ||
2832 | /* Push a new handle if no closed handles were found. */ | |
2833 | if (lowest_closed_fd == VEC_length (fileio_fh_t, fileio_fhandles)) | |
2834 | fh = VEC_safe_push (fileio_fh_t, fileio_fhandles, NULL); | |
2835 | ||
2836 | /* Fill in the handle. */ | |
2837 | fh->t = t; | |
2838 | fh->fd = fd; | |
2839 | ||
2840 | /* Return its index, and start the next lookup at | |
2841 | the next index. */ | |
2842 | return lowest_closed_fd++; | |
2843 | } | |
2844 | ||
2845 | /* Release a target fileio file descriptor. */ | |
2846 | ||
2847 | static void | |
2848 | release_fileio_fd (int fd, fileio_fh_t *fh) | |
2849 | { | |
2850 | fh->fd = -1; | |
2851 | lowest_closed_fd = min (lowest_closed_fd, fd); | |
2852 | } | |
2853 | ||
2854 | /* Return a pointer to the fileio_fhandle_t corresponding to FD. */ | |
2855 | ||
2856 | #define fileio_fd_to_fh(fd) \ | |
2857 | VEC_index (fileio_fh_t, fileio_fhandles, (fd)) | |
2858 | ||
4313b8c0 GB |
2859 | /* Helper for target_fileio_open and |
2860 | target_fileio_open_warn_if_slow. */ | |
12e2a5fd | 2861 | |
4313b8c0 GB |
2862 | static int |
2863 | target_fileio_open_1 (struct inferior *inf, const char *filename, | |
2864 | int flags, int mode, int warn_if_slow, | |
2865 | int *target_errno) | |
7313baad UW |
2866 | { |
2867 | struct target_ops *t; | |
2868 | ||
2869 | for (t = default_fileio_target (); t != NULL; t = t->beneath) | |
2870 | { | |
2871 | if (t->to_fileio_open != NULL) | |
2872 | { | |
07c138c8 | 2873 | int fd = t->to_fileio_open (t, inf, filename, flags, mode, |
4313b8c0 | 2874 | warn_if_slow, target_errno); |
7313baad | 2875 | |
1c4b552b GB |
2876 | if (fd < 0) |
2877 | fd = -1; | |
2878 | else | |
2879 | fd = acquire_fileio_fd (t, fd); | |
2880 | ||
7313baad UW |
2881 | if (targetdebug) |
2882 | fprintf_unfiltered (gdb_stdlog, | |
4313b8c0 | 2883 | "target_fileio_open (%d,%s,0x%x,0%o,%d)" |
07c138c8 GB |
2884 | " = %d (%d)\n", |
2885 | inf == NULL ? 0 : inf->num, | |
7313baad | 2886 | filename, flags, mode, |
4313b8c0 GB |
2887 | warn_if_slow, fd, |
2888 | fd != -1 ? 0 : *target_errno); | |
7313baad UW |
2889 | return fd; |
2890 | } | |
2891 | } | |
2892 | ||
2893 | *target_errno = FILEIO_ENOSYS; | |
2894 | return -1; | |
2895 | } | |
2896 | ||
12e2a5fd GB |
2897 | /* See target.h. */ |
2898 | ||
4313b8c0 GB |
2899 | int |
2900 | target_fileio_open (struct inferior *inf, const char *filename, | |
2901 | int flags, int mode, int *target_errno) | |
2902 | { | |
2903 | return target_fileio_open_1 (inf, filename, flags, mode, 0, | |
2904 | target_errno); | |
2905 | } | |
2906 | ||
2907 | /* See target.h. */ | |
2908 | ||
2909 | int | |
2910 | target_fileio_open_warn_if_slow (struct inferior *inf, | |
2911 | const char *filename, | |
2912 | int flags, int mode, int *target_errno) | |
2913 | { | |
2914 | return target_fileio_open_1 (inf, filename, flags, mode, 1, | |
2915 | target_errno); | |
2916 | } | |
2917 | ||
2918 | /* See target.h. */ | |
2919 | ||
7313baad UW |
2920 | int |
2921 | target_fileio_pwrite (int fd, const gdb_byte *write_buf, int len, | |
2922 | ULONGEST offset, int *target_errno) | |
2923 | { | |
1c4b552b GB |
2924 | fileio_fh_t *fh = fileio_fd_to_fh (fd); |
2925 | int ret = -1; | |
7313baad | 2926 | |
1c4b552b GB |
2927 | if (is_closed_fileio_fh (fh->fd)) |
2928 | *target_errno = EBADF; | |
2929 | else | |
2930 | ret = fh->t->to_fileio_pwrite (fh->t, fh->fd, write_buf, | |
2931 | len, offset, target_errno); | |
7313baad | 2932 | |
1c4b552b GB |
2933 | if (targetdebug) |
2934 | fprintf_unfiltered (gdb_stdlog, | |
2935 | "target_fileio_pwrite (%d,...,%d,%s) " | |
2936 | "= %d (%d)\n", | |
2937 | fd, len, pulongest (offset), | |
2938 | ret, ret != -1 ? 0 : *target_errno); | |
2939 | return ret; | |
7313baad UW |
2940 | } |
2941 | ||
12e2a5fd GB |
2942 | /* See target.h. */ |
2943 | ||
7313baad UW |
2944 | int |
2945 | target_fileio_pread (int fd, gdb_byte *read_buf, int len, | |
2946 | ULONGEST offset, int *target_errno) | |
2947 | { | |
1c4b552b GB |
2948 | fileio_fh_t *fh = fileio_fd_to_fh (fd); |
2949 | int ret = -1; | |
7313baad | 2950 | |
1c4b552b GB |
2951 | if (is_closed_fileio_fh (fh->fd)) |
2952 | *target_errno = EBADF; | |
2953 | else | |
2954 | ret = fh->t->to_fileio_pread (fh->t, fh->fd, read_buf, | |
2955 | len, offset, target_errno); | |
7313baad | 2956 | |
1c4b552b GB |
2957 | if (targetdebug) |
2958 | fprintf_unfiltered (gdb_stdlog, | |
2959 | "target_fileio_pread (%d,...,%d,%s) " | |
2960 | "= %d (%d)\n", | |
2961 | fd, len, pulongest (offset), | |
2962 | ret, ret != -1 ? 0 : *target_errno); | |
9b15c1f0 GB |
2963 | return ret; |
2964 | } | |
2965 | ||
2966 | /* See target.h. */ | |
12e2a5fd | 2967 | |
9b15c1f0 GB |
2968 | int |
2969 | target_fileio_fstat (int fd, struct stat *sb, int *target_errno) | |
2970 | { | |
2971 | fileio_fh_t *fh = fileio_fd_to_fh (fd); | |
2972 | int ret = -1; | |
2973 | ||
2974 | if (is_closed_fileio_fh (fh->fd)) | |
2975 | *target_errno = EBADF; | |
2976 | else | |
2977 | ret = fh->t->to_fileio_fstat (fh->t, fh->fd, sb, target_errno); | |
2978 | ||
2979 | if (targetdebug) | |
2980 | fprintf_unfiltered (gdb_stdlog, | |
2981 | "target_fileio_fstat (%d) = %d (%d)\n", | |
2982 | fd, ret, ret != -1 ? 0 : *target_errno); | |
1c4b552b | 2983 | return ret; |
7313baad UW |
2984 | } |
2985 | ||
12e2a5fd GB |
2986 | /* See target.h. */ |
2987 | ||
7313baad UW |
2988 | int |
2989 | target_fileio_close (int fd, int *target_errno) | |
2990 | { | |
1c4b552b GB |
2991 | fileio_fh_t *fh = fileio_fd_to_fh (fd); |
2992 | int ret = -1; | |
7313baad | 2993 | |
1c4b552b GB |
2994 | if (is_closed_fileio_fh (fh->fd)) |
2995 | *target_errno = EBADF; | |
2996 | else | |
7313baad | 2997 | { |
1c4b552b GB |
2998 | ret = fh->t->to_fileio_close (fh->t, fh->fd, target_errno); |
2999 | release_fileio_fd (fd, fh); | |
7313baad UW |
3000 | } |
3001 | ||
1c4b552b GB |
3002 | if (targetdebug) |
3003 | fprintf_unfiltered (gdb_stdlog, | |
3004 | "target_fileio_close (%d) = %d (%d)\n", | |
3005 | fd, ret, ret != -1 ? 0 : *target_errno); | |
3006 | return ret; | |
7313baad UW |
3007 | } |
3008 | ||
12e2a5fd GB |
3009 | /* See target.h. */ |
3010 | ||
7313baad | 3011 | int |
07c138c8 GB |
3012 | target_fileio_unlink (struct inferior *inf, const char *filename, |
3013 | int *target_errno) | |
7313baad UW |
3014 | { |
3015 | struct target_ops *t; | |
3016 | ||
3017 | for (t = default_fileio_target (); t != NULL; t = t->beneath) | |
3018 | { | |
3019 | if (t->to_fileio_unlink != NULL) | |
3020 | { | |
07c138c8 GB |
3021 | int ret = t->to_fileio_unlink (t, inf, filename, |
3022 | target_errno); | |
7313baad UW |
3023 | |
3024 | if (targetdebug) | |
3025 | fprintf_unfiltered (gdb_stdlog, | |
07c138c8 GB |
3026 | "target_fileio_unlink (%d,%s)" |
3027 | " = %d (%d)\n", | |
3028 | inf == NULL ? 0 : inf->num, filename, | |
3029 | ret, ret != -1 ? 0 : *target_errno); | |
7313baad UW |
3030 | return ret; |
3031 | } | |
3032 | } | |
3033 | ||
3034 | *target_errno = FILEIO_ENOSYS; | |
3035 | return -1; | |
3036 | } | |
3037 | ||
12e2a5fd GB |
3038 | /* See target.h. */ |
3039 | ||
b9e7b9c3 | 3040 | char * |
07c138c8 GB |
3041 | target_fileio_readlink (struct inferior *inf, const char *filename, |
3042 | int *target_errno) | |
b9e7b9c3 UW |
3043 | { |
3044 | struct target_ops *t; | |
3045 | ||
3046 | for (t = default_fileio_target (); t != NULL; t = t->beneath) | |
3047 | { | |
3048 | if (t->to_fileio_readlink != NULL) | |
3049 | { | |
07c138c8 GB |
3050 | char *ret = t->to_fileio_readlink (t, inf, filename, |
3051 | target_errno); | |
b9e7b9c3 UW |
3052 | |
3053 | if (targetdebug) | |
3054 | fprintf_unfiltered (gdb_stdlog, | |
07c138c8 GB |
3055 | "target_fileio_readlink (%d,%s)" |
3056 | " = %s (%d)\n", | |
3057 | inf == NULL ? 0 : inf->num, | |
b9e7b9c3 UW |
3058 | filename, ret? ret : "(nil)", |
3059 | ret? 0 : *target_errno); | |
3060 | return ret; | |
3061 | } | |
3062 | } | |
3063 | ||
3064 | *target_errno = FILEIO_ENOSYS; | |
3065 | return NULL; | |
3066 | } | |
3067 | ||
7313baad UW |
3068 | static void |
3069 | target_fileio_close_cleanup (void *opaque) | |
3070 | { | |
3071 | int fd = *(int *) opaque; | |
3072 | int target_errno; | |
3073 | ||
3074 | target_fileio_close (fd, &target_errno); | |
3075 | } | |
3076 | ||
07c138c8 GB |
3077 | /* Read target file FILENAME, in the filesystem as seen by INF. If |
3078 | INF is NULL, use the filesystem seen by the debugger (GDB or, for | |
3079 | remote targets, the remote stub). Store the result in *BUF_P and | |
3080 | return the size of the transferred data. PADDING additional bytes | |
3081 | are available in *BUF_P. This is a helper function for | |
3082 | target_fileio_read_alloc; see the declaration of that function for | |
3083 | more information. */ | |
7313baad | 3084 | |
f7af1fcd JK |
3085 | static LONGEST |
3086 | target_fileio_read_alloc_1 (struct inferior *inf, const char *filename, | |
3087 | gdb_byte **buf_p, int padding) | |
3088 | { | |
3089 | struct cleanup *close_cleanup; | |
db1ff28b JK |
3090 | size_t buf_alloc, buf_pos; |
3091 | gdb_byte *buf; | |
3092 | LONGEST n; | |
3093 | int fd; | |
3094 | int target_errno; | |
f7af1fcd | 3095 | |
db1ff28b JK |
3096 | fd = target_fileio_open (inf, filename, FILEIO_O_RDONLY, 0700, |
3097 | &target_errno); | |
f7af1fcd JK |
3098 | if (fd == -1) |
3099 | return -1; | |
3100 | ||
3101 | close_cleanup = make_cleanup (target_fileio_close_cleanup, &fd); | |
db1ff28b JK |
3102 | |
3103 | /* Start by reading up to 4K at a time. The target will throttle | |
3104 | this number down if necessary. */ | |
3105 | buf_alloc = 4096; | |
224c3ddb | 3106 | buf = (gdb_byte *) xmalloc (buf_alloc); |
db1ff28b JK |
3107 | buf_pos = 0; |
3108 | while (1) | |
3109 | { | |
3110 | n = target_fileio_pread (fd, &buf[buf_pos], | |
3111 | buf_alloc - buf_pos - padding, buf_pos, | |
3112 | &target_errno); | |
3113 | if (n < 0) | |
3114 | { | |
3115 | /* An error occurred. */ | |
3116 | do_cleanups (close_cleanup); | |
3117 | xfree (buf); | |
3118 | return -1; | |
3119 | } | |
3120 | else if (n == 0) | |
3121 | { | |
3122 | /* Read all there was. */ | |
3123 | do_cleanups (close_cleanup); | |
3124 | if (buf_pos == 0) | |
3125 | xfree (buf); | |
3126 | else | |
3127 | *buf_p = buf; | |
3128 | return buf_pos; | |
3129 | } | |
3130 | ||
3131 | buf_pos += n; | |
3132 | ||
3133 | /* If the buffer is filling up, expand it. */ | |
3134 | if (buf_alloc < buf_pos * 2) | |
3135 | { | |
3136 | buf_alloc *= 2; | |
224c3ddb | 3137 | buf = (gdb_byte *) xrealloc (buf, buf_alloc); |
db1ff28b JK |
3138 | } |
3139 | ||
3140 | QUIT; | |
3141 | } | |
f7af1fcd JK |
3142 | } |
3143 | ||
12e2a5fd | 3144 | /* See target.h. */ |
7313baad UW |
3145 | |
3146 | LONGEST | |
07c138c8 GB |
3147 | target_fileio_read_alloc (struct inferior *inf, const char *filename, |
3148 | gdb_byte **buf_p) | |
7313baad | 3149 | { |
07c138c8 | 3150 | return target_fileio_read_alloc_1 (inf, filename, buf_p, 0); |
7313baad UW |
3151 | } |
3152 | ||
db1ff28b | 3153 | /* See target.h. */ |
f7af1fcd JK |
3154 | |
3155 | char * | |
3156 | target_fileio_read_stralloc (struct inferior *inf, const char *filename) | |
3157 | { | |
db1ff28b JK |
3158 | gdb_byte *buffer; |
3159 | char *bufstr; | |
3160 | LONGEST i, transferred; | |
3161 | ||
3162 | transferred = target_fileio_read_alloc_1 (inf, filename, &buffer, 1); | |
3163 | bufstr = (char *) buffer; | |
3164 | ||
3165 | if (transferred < 0) | |
3166 | return NULL; | |
3167 | ||
3168 | if (transferred == 0) | |
3169 | return xstrdup (""); | |
3170 | ||
3171 | bufstr[transferred] = 0; | |
3172 | ||
3173 | /* Check for embedded NUL bytes; but allow trailing NULs. */ | |
3174 | for (i = strlen (bufstr); i < transferred; i++) | |
3175 | if (bufstr[i] != 0) | |
3176 | { | |
3177 | warning (_("target file %s " | |
3178 | "contained unexpected null characters"), | |
3179 | filename); | |
3180 | break; | |
3181 | } | |
3182 | ||
3183 | return bufstr; | |
f7af1fcd | 3184 | } |
7313baad | 3185 | |
db1ff28b | 3186 | |
e0d24f8d | 3187 | static int |
31568a15 TT |
3188 | default_region_ok_for_hw_watchpoint (struct target_ops *self, |
3189 | CORE_ADDR addr, int len) | |
e0d24f8d | 3190 | { |
f5656ead | 3191 | return (len <= gdbarch_ptr_bit (target_gdbarch ()) / TARGET_CHAR_BIT); |
ccaa32c7 GS |
3192 | } |
3193 | ||
5009afc5 AS |
3194 | static int |
3195 | default_watchpoint_addr_within_range (struct target_ops *target, | |
3196 | CORE_ADDR addr, | |
3197 | CORE_ADDR start, int length) | |
3198 | { | |
3199 | return addr >= start && addr < start + length; | |
3200 | } | |
3201 | ||
c2250ad1 UW |
3202 | static struct gdbarch * |
3203 | default_thread_architecture (struct target_ops *ops, ptid_t ptid) | |
3204 | { | |
f5656ead | 3205 | return target_gdbarch (); |
c2250ad1 UW |
3206 | } |
3207 | ||
c906108c | 3208 | static int |
555bbdeb TT |
3209 | return_zero (struct target_ops *ignore) |
3210 | { | |
3211 | return 0; | |
3212 | } | |
3213 | ||
3214 | static int | |
3215 | return_zero_has_execution (struct target_ops *ignore, ptid_t ignore2) | |
c906108c SS |
3216 | { |
3217 | return 0; | |
3218 | } | |
3219 | ||
ed9a39eb JM |
3220 | /* |
3221 | * Find the next target down the stack from the specified target. | |
3222 | */ | |
3223 | ||
3224 | struct target_ops * | |
fba45db2 | 3225 | find_target_beneath (struct target_ops *t) |
ed9a39eb | 3226 | { |
258b763a | 3227 | return t->beneath; |
ed9a39eb JM |
3228 | } |
3229 | ||
8b06beed TT |
3230 | /* See target.h. */ |
3231 | ||
3232 | struct target_ops * | |
3233 | find_target_at (enum strata stratum) | |
3234 | { | |
3235 | struct target_ops *t; | |
3236 | ||
3237 | for (t = current_target.beneath; t != NULL; t = t->beneath) | |
3238 | if (t->to_stratum == stratum) | |
3239 | return t; | |
3240 | ||
3241 | return NULL; | |
3242 | } | |
3243 | ||
c906108c | 3244 | \f |
0f48b757 PA |
3245 | |
3246 | /* See target.h */ | |
3247 | ||
3248 | void | |
3249 | target_announce_detach (int from_tty) | |
3250 | { | |
3251 | pid_t pid; | |
3252 | char *exec_file; | |
3253 | ||
3254 | if (!from_tty) | |
3255 | return; | |
3256 | ||
3257 | exec_file = get_exec_file (0); | |
3258 | if (exec_file == NULL) | |
3259 | exec_file = ""; | |
3260 | ||
3261 | pid = ptid_get_pid (inferior_ptid); | |
3262 | printf_unfiltered (_("Detaching from program: %s, %s\n"), exec_file, | |
3263 | target_pid_to_str (pid_to_ptid (pid))); | |
3264 | gdb_flush (gdb_stdout); | |
3265 | } | |
3266 | ||
c906108c SS |
3267 | /* The inferior process has died. Long live the inferior! */ |
3268 | ||
3269 | void | |
fba45db2 | 3270 | generic_mourn_inferior (void) |
c906108c | 3271 | { |
7f9f62ba | 3272 | ptid_t ptid; |
c906108c | 3273 | |
7f9f62ba | 3274 | ptid = inferior_ptid; |
39f77062 | 3275 | inferior_ptid = null_ptid; |
7f9f62ba | 3276 | |
f59f708a PA |
3277 | /* Mark breakpoints uninserted in case something tries to delete a |
3278 | breakpoint while we delete the inferior's threads (which would | |
3279 | fail, since the inferior is long gone). */ | |
3280 | mark_breakpoints_out (); | |
3281 | ||
7f9f62ba PA |
3282 | if (!ptid_equal (ptid, null_ptid)) |
3283 | { | |
3284 | int pid = ptid_get_pid (ptid); | |
6c95b8df | 3285 | exit_inferior (pid); |
7f9f62ba PA |
3286 | } |
3287 | ||
f59f708a PA |
3288 | /* Note this wipes step-resume breakpoints, so needs to be done |
3289 | after exit_inferior, which ends up referencing the step-resume | |
3290 | breakpoints through clear_thread_inferior_resources. */ | |
c906108c | 3291 | breakpoint_init_inferior (inf_exited); |
f59f708a | 3292 | |
c906108c SS |
3293 | registers_changed (); |
3294 | ||
c906108c SS |
3295 | reopen_exec_file (); |
3296 | reinit_frame_cache (); | |
3297 | ||
9a4105ab AC |
3298 | if (deprecated_detach_hook) |
3299 | deprecated_detach_hook (); | |
c906108c SS |
3300 | } |
3301 | \f | |
fd0a2a6f MK |
3302 | /* Convert a normal process ID to a string. Returns the string in a |
3303 | static buffer. */ | |
c906108c SS |
3304 | |
3305 | char * | |
39f77062 | 3306 | normal_pid_to_str (ptid_t ptid) |
c906108c | 3307 | { |
fd0a2a6f | 3308 | static char buf[32]; |
c906108c | 3309 | |
5fff8fc0 | 3310 | xsnprintf (buf, sizeof buf, "process %d", ptid_get_pid (ptid)); |
c906108c SS |
3311 | return buf; |
3312 | } | |
3313 | ||
2c0b251b | 3314 | static char * |
770234d3 | 3315 | default_pid_to_str (struct target_ops *ops, ptid_t ptid) |
117de6a9 PA |
3316 | { |
3317 | return normal_pid_to_str (ptid); | |
3318 | } | |
3319 | ||
9b4eba8e HZ |
3320 | /* Error-catcher for target_find_memory_regions. */ |
3321 | static int | |
2e73927c TT |
3322 | dummy_find_memory_regions (struct target_ops *self, |
3323 | find_memory_region_ftype ignore1, void *ignore2) | |
be4d1333 | 3324 | { |
9b4eba8e | 3325 | error (_("Command not implemented for this target.")); |
be4d1333 MS |
3326 | return 0; |
3327 | } | |
3328 | ||
9b4eba8e HZ |
3329 | /* Error-catcher for target_make_corefile_notes. */ |
3330 | static char * | |
fc6691b2 TT |
3331 | dummy_make_corefile_notes (struct target_ops *self, |
3332 | bfd *ignore1, int *ignore2) | |
be4d1333 | 3333 | { |
9b4eba8e | 3334 | error (_("Command not implemented for this target.")); |
be4d1333 MS |
3335 | return NULL; |
3336 | } | |
3337 | ||
c906108c SS |
3338 | /* Set up the handful of non-empty slots needed by the dummy target |
3339 | vector. */ | |
3340 | ||
3341 | static void | |
fba45db2 | 3342 | init_dummy_target (void) |
c906108c SS |
3343 | { |
3344 | dummy_target.to_shortname = "None"; | |
3345 | dummy_target.to_longname = "None"; | |
3346 | dummy_target.to_doc = ""; | |
03583c20 UW |
3347 | dummy_target.to_supports_disable_randomization |
3348 | = find_default_supports_disable_randomization; | |
c906108c | 3349 | dummy_target.to_stratum = dummy_stratum; |
555bbdeb TT |
3350 | dummy_target.to_has_all_memory = return_zero; |
3351 | dummy_target.to_has_memory = return_zero; | |
3352 | dummy_target.to_has_stack = return_zero; | |
3353 | dummy_target.to_has_registers = return_zero; | |
3354 | dummy_target.to_has_execution = return_zero_has_execution; | |
c906108c | 3355 | dummy_target.to_magic = OPS_MAGIC; |
1101cb7b TT |
3356 | |
3357 | install_dummy_methods (&dummy_target); | |
c906108c | 3358 | } |
c906108c | 3359 | \f |
c906108c | 3360 | |
f1c07ab0 | 3361 | void |
460014f5 | 3362 | target_close (struct target_ops *targ) |
f1c07ab0 | 3363 | { |
7fdc1521 TT |
3364 | gdb_assert (!target_is_pushed (targ)); |
3365 | ||
f1c07ab0 | 3366 | if (targ->to_xclose != NULL) |
460014f5 | 3367 | targ->to_xclose (targ); |
f1c07ab0 | 3368 | else if (targ->to_close != NULL) |
de90e03d | 3369 | targ->to_close (targ); |
947b8855 PA |
3370 | |
3371 | if (targetdebug) | |
460014f5 | 3372 | fprintf_unfiltered (gdb_stdlog, "target_close ()\n"); |
f1c07ab0 AC |
3373 | } |
3374 | ||
28439f5e PA |
3375 | int |
3376 | target_thread_alive (ptid_t ptid) | |
c906108c | 3377 | { |
a7068b60 | 3378 | return current_target.to_thread_alive (¤t_target, ptid); |
28439f5e PA |
3379 | } |
3380 | ||
3381 | void | |
e8032dde | 3382 | target_update_thread_list (void) |
28439f5e | 3383 | { |
e8032dde | 3384 | current_target.to_update_thread_list (¤t_target); |
c906108c SS |
3385 | } |
3386 | ||
d914c394 SS |
3387 | void |
3388 | target_stop (ptid_t ptid) | |
3389 | { | |
3390 | if (!may_stop) | |
3391 | { | |
3392 | warning (_("May not interrupt or stop the target, ignoring attempt")); | |
3393 | return; | |
3394 | } | |
3395 | ||
1eab8a48 | 3396 | (*current_target.to_stop) (¤t_target, ptid); |
d914c394 SS |
3397 | } |
3398 | ||
bfedc46a PA |
3399 | void |
3400 | target_interrupt (ptid_t ptid) | |
3401 | { | |
3402 | if (!may_stop) | |
3403 | { | |
3404 | warning (_("May not interrupt or stop the target, ignoring attempt")); | |
3405 | return; | |
3406 | } | |
3407 | ||
3408 | (*current_target.to_interrupt) (¤t_target, ptid); | |
3409 | } | |
3410 | ||
abc56d60 PA |
3411 | /* See target.h. */ |
3412 | ||
93692b58 PA |
3413 | void |
3414 | target_pass_ctrlc (void) | |
3415 | { | |
3416 | (*current_target.to_pass_ctrlc) (¤t_target); | |
3417 | } | |
3418 | ||
3419 | /* See target.h. */ | |
3420 | ||
3421 | void | |
3422 | default_target_pass_ctrlc (struct target_ops *ops) | |
3423 | { | |
3424 | target_interrupt (inferior_ptid); | |
3425 | } | |
3426 | ||
f8c1d06b GB |
3427 | /* See target/target.h. */ |
3428 | ||
3429 | void | |
03f4463b | 3430 | target_stop_and_wait (ptid_t ptid) |
f8c1d06b GB |
3431 | { |
3432 | struct target_waitstatus status; | |
3433 | int was_non_stop = non_stop; | |
3434 | ||
3435 | non_stop = 1; | |
3436 | target_stop (ptid); | |
3437 | ||
3438 | memset (&status, 0, sizeof (status)); | |
3439 | target_wait (ptid, &status, 0); | |
3440 | ||
3441 | non_stop = was_non_stop; | |
3442 | } | |
3443 | ||
3444 | /* See target/target.h. */ | |
3445 | ||
3446 | void | |
03f4463b | 3447 | target_continue_no_signal (ptid_t ptid) |
f8c1d06b GB |
3448 | { |
3449 | target_resume (ptid, 0, GDB_SIGNAL_0); | |
3450 | } | |
3451 | ||
09826ec5 PA |
3452 | /* Concatenate ELEM to LIST, a comma separate list, and return the |
3453 | result. The LIST incoming argument is released. */ | |
3454 | ||
3455 | static char * | |
3456 | str_comma_list_concat_elem (char *list, const char *elem) | |
3457 | { | |
3458 | if (list == NULL) | |
3459 | return xstrdup (elem); | |
3460 | else | |
3461 | return reconcat (list, list, ", ", elem, (char *) NULL); | |
3462 | } | |
3463 | ||
3464 | /* Helper for target_options_to_string. If OPT is present in | |
3465 | TARGET_OPTIONS, append the OPT_STR (string version of OPT) in RET. | |
3466 | Returns the new resulting string. OPT is removed from | |
3467 | TARGET_OPTIONS. */ | |
3468 | ||
3469 | static char * | |
3470 | do_option (int *target_options, char *ret, | |
3471 | int opt, char *opt_str) | |
3472 | { | |
3473 | if ((*target_options & opt) != 0) | |
3474 | { | |
3475 | ret = str_comma_list_concat_elem (ret, opt_str); | |
3476 | *target_options &= ~opt; | |
3477 | } | |
3478 | ||
3479 | return ret; | |
3480 | } | |
3481 | ||
3482 | char * | |
3483 | target_options_to_string (int target_options) | |
3484 | { | |
3485 | char *ret = NULL; | |
3486 | ||
3487 | #define DO_TARG_OPTION(OPT) \ | |
3488 | ret = do_option (&target_options, ret, OPT, #OPT) | |
3489 | ||
3490 | DO_TARG_OPTION (TARGET_WNOHANG); | |
3491 | ||
3492 | if (target_options != 0) | |
3493 | ret = str_comma_list_concat_elem (ret, "unknown???"); | |
3494 | ||
3495 | if (ret == NULL) | |
3496 | ret = xstrdup (""); | |
3497 | return ret; | |
3498 | } | |
3499 | ||
bf0c5130 | 3500 | static void |
56be3814 UW |
3501 | debug_print_register (const char * func, |
3502 | struct regcache *regcache, int regno) | |
bf0c5130 | 3503 | { |
f8d29908 | 3504 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
5d502164 | 3505 | |
bf0c5130 | 3506 | fprintf_unfiltered (gdb_stdlog, "%s ", func); |
f8d29908 | 3507 | if (regno >= 0 && regno < gdbarch_num_regs (gdbarch) |
f8d29908 UW |
3508 | && gdbarch_register_name (gdbarch, regno) != NULL |
3509 | && gdbarch_register_name (gdbarch, regno)[0] != '\0') | |
3510 | fprintf_unfiltered (gdb_stdlog, "(%s)", | |
3511 | gdbarch_register_name (gdbarch, regno)); | |
bf0c5130 AC |
3512 | else |
3513 | fprintf_unfiltered (gdb_stdlog, "(%d)", regno); | |
0ff58721 | 3514 | if (regno >= 0 && regno < gdbarch_num_regs (gdbarch)) |
bf0c5130 | 3515 | { |
e17a4113 | 3516 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
f8d29908 | 3517 | int i, size = register_size (gdbarch, regno); |
e362b510 | 3518 | gdb_byte buf[MAX_REGISTER_SIZE]; |
5d502164 | 3519 | |
0ff58721 | 3520 | regcache_raw_collect (regcache, regno, buf); |
bf0c5130 | 3521 | fprintf_unfiltered (gdb_stdlog, " = "); |
81c4a259 | 3522 | for (i = 0; i < size; i++) |
bf0c5130 AC |
3523 | { |
3524 | fprintf_unfiltered (gdb_stdlog, "%02x", buf[i]); | |
3525 | } | |
81c4a259 | 3526 | if (size <= sizeof (LONGEST)) |
bf0c5130 | 3527 | { |
e17a4113 | 3528 | ULONGEST val = extract_unsigned_integer (buf, size, byte_order); |
5d502164 | 3529 | |
0b1553bc UW |
3530 | fprintf_unfiltered (gdb_stdlog, " %s %s", |
3531 | core_addr_to_string_nz (val), plongest (val)); | |
bf0c5130 AC |
3532 | } |
3533 | } | |
3534 | fprintf_unfiltered (gdb_stdlog, "\n"); | |
3535 | } | |
3536 | ||
28439f5e PA |
3537 | void |
3538 | target_fetch_registers (struct regcache *regcache, int regno) | |
c906108c | 3539 | { |
ad5989bd TT |
3540 | current_target.to_fetch_registers (¤t_target, regcache, regno); |
3541 | if (targetdebug) | |
3542 | debug_print_register ("target_fetch_registers", regcache, regno); | |
c906108c SS |
3543 | } |
3544 | ||
28439f5e PA |
3545 | void |
3546 | target_store_registers (struct regcache *regcache, int regno) | |
c906108c | 3547 | { |
d914c394 SS |
3548 | if (!may_write_registers) |
3549 | error (_("Writing to registers is not allowed (regno %d)"), regno); | |
3550 | ||
6b84065d TT |
3551 | current_target.to_store_registers (¤t_target, regcache, regno); |
3552 | if (targetdebug) | |
28439f5e | 3553 | { |
6b84065d | 3554 | debug_print_register ("target_store_registers", regcache, regno); |
28439f5e | 3555 | } |
c906108c SS |
3556 | } |
3557 | ||
dc146f7c VP |
3558 | int |
3559 | target_core_of_thread (ptid_t ptid) | |
3560 | { | |
a7068b60 | 3561 | return current_target.to_core_of_thread (¤t_target, ptid); |
dc146f7c VP |
3562 | } |
3563 | ||
936d2992 PA |
3564 | int |
3565 | simple_verify_memory (struct target_ops *ops, | |
3566 | const gdb_byte *data, CORE_ADDR lma, ULONGEST size) | |
3567 | { | |
3568 | LONGEST total_xfered = 0; | |
3569 | ||
3570 | while (total_xfered < size) | |
3571 | { | |
3572 | ULONGEST xfered_len; | |
3573 | enum target_xfer_status status; | |
3574 | gdb_byte buf[1024]; | |
3575 | ULONGEST howmuch = min (sizeof (buf), size - total_xfered); | |
3576 | ||
3577 | status = target_xfer_partial (ops, TARGET_OBJECT_MEMORY, NULL, | |
3578 | buf, NULL, lma + total_xfered, howmuch, | |
3579 | &xfered_len); | |
3580 | if (status == TARGET_XFER_OK | |
3581 | && memcmp (data + total_xfered, buf, xfered_len) == 0) | |
3582 | { | |
3583 | total_xfered += xfered_len; | |
3584 | QUIT; | |
3585 | } | |
3586 | else | |
3587 | return 0; | |
3588 | } | |
3589 | return 1; | |
3590 | } | |
3591 | ||
3592 | /* Default implementation of memory verification. */ | |
3593 | ||
3594 | static int | |
3595 | default_verify_memory (struct target_ops *self, | |
3596 | const gdb_byte *data, CORE_ADDR memaddr, ULONGEST size) | |
3597 | { | |
3598 | /* Start over from the top of the target stack. */ | |
3599 | return simple_verify_memory (current_target.beneath, | |
3600 | data, memaddr, size); | |
3601 | } | |
3602 | ||
4a5e7a5b PA |
3603 | int |
3604 | target_verify_memory (const gdb_byte *data, CORE_ADDR memaddr, ULONGEST size) | |
3605 | { | |
a7068b60 TT |
3606 | return current_target.to_verify_memory (¤t_target, |
3607 | data, memaddr, size); | |
4a5e7a5b PA |
3608 | } |
3609 | ||
9c06b0b4 TJB |
3610 | /* The documentation for this function is in its prototype declaration in |
3611 | target.h. */ | |
3612 | ||
3613 | int | |
f4b0a671 SM |
3614 | target_insert_mask_watchpoint (CORE_ADDR addr, CORE_ADDR mask, |
3615 | enum target_hw_bp_type rw) | |
9c06b0b4 | 3616 | { |
a7068b60 TT |
3617 | return current_target.to_insert_mask_watchpoint (¤t_target, |
3618 | addr, mask, rw); | |
9c06b0b4 TJB |
3619 | } |
3620 | ||
3621 | /* The documentation for this function is in its prototype declaration in | |
3622 | target.h. */ | |
3623 | ||
3624 | int | |
f4b0a671 SM |
3625 | target_remove_mask_watchpoint (CORE_ADDR addr, CORE_ADDR mask, |
3626 | enum target_hw_bp_type rw) | |
9c06b0b4 | 3627 | { |
a7068b60 TT |
3628 | return current_target.to_remove_mask_watchpoint (¤t_target, |
3629 | addr, mask, rw); | |
9c06b0b4 TJB |
3630 | } |
3631 | ||
3632 | /* The documentation for this function is in its prototype declaration | |
3633 | in target.h. */ | |
3634 | ||
3635 | int | |
3636 | target_masked_watch_num_registers (CORE_ADDR addr, CORE_ADDR mask) | |
3637 | { | |
6c7e5e5c TT |
3638 | return current_target.to_masked_watch_num_registers (¤t_target, |
3639 | addr, mask); | |
9c06b0b4 TJB |
3640 | } |
3641 | ||
f1310107 TJB |
3642 | /* The documentation for this function is in its prototype declaration |
3643 | in target.h. */ | |
3644 | ||
3645 | int | |
3646 | target_ranged_break_num_registers (void) | |
3647 | { | |
a134316b | 3648 | return current_target.to_ranged_break_num_registers (¤t_target); |
f1310107 TJB |
3649 | } |
3650 | ||
02d27625 MM |
3651 | /* See target.h. */ |
3652 | ||
043c3577 MM |
3653 | int |
3654 | target_supports_btrace (enum btrace_format format) | |
3655 | { | |
3656 | return current_target.to_supports_btrace (¤t_target, format); | |
3657 | } | |
3658 | ||
3659 | /* See target.h. */ | |
3660 | ||
02d27625 | 3661 | struct btrace_target_info * |
f4abbc16 | 3662 | target_enable_btrace (ptid_t ptid, const struct btrace_config *conf) |
02d27625 | 3663 | { |
f4abbc16 | 3664 | return current_target.to_enable_btrace (¤t_target, ptid, conf); |
02d27625 MM |
3665 | } |
3666 | ||
3667 | /* See target.h. */ | |
3668 | ||
3669 | void | |
3670 | target_disable_btrace (struct btrace_target_info *btinfo) | |
3671 | { | |
8dc292d3 | 3672 | current_target.to_disable_btrace (¤t_target, btinfo); |
02d27625 MM |
3673 | } |
3674 | ||
3675 | /* See target.h. */ | |
3676 | ||
3677 | void | |
3678 | target_teardown_btrace (struct btrace_target_info *btinfo) | |
3679 | { | |
9ace480d | 3680 | current_target.to_teardown_btrace (¤t_target, btinfo); |
02d27625 MM |
3681 | } |
3682 | ||
3683 | /* See target.h. */ | |
3684 | ||
969c39fb | 3685 | enum btrace_error |
734b0e4b | 3686 | target_read_btrace (struct btrace_data *btrace, |
969c39fb | 3687 | struct btrace_target_info *btinfo, |
02d27625 MM |
3688 | enum btrace_read_type type) |
3689 | { | |
eb5b20d4 | 3690 | return current_target.to_read_btrace (¤t_target, btrace, btinfo, type); |
02d27625 MM |
3691 | } |
3692 | ||
d02ed0bb MM |
3693 | /* See target.h. */ |
3694 | ||
f4abbc16 MM |
3695 | const struct btrace_config * |
3696 | target_btrace_conf (const struct btrace_target_info *btinfo) | |
3697 | { | |
3698 | return current_target.to_btrace_conf (¤t_target, btinfo); | |
3699 | } | |
3700 | ||
3701 | /* See target.h. */ | |
3702 | ||
7c1687a9 MM |
3703 | void |
3704 | target_stop_recording (void) | |
3705 | { | |
ee97f592 | 3706 | current_target.to_stop_recording (¤t_target); |
7c1687a9 MM |
3707 | } |
3708 | ||
3709 | /* See target.h. */ | |
3710 | ||
d02ed0bb | 3711 | void |
85e1311a | 3712 | target_save_record (const char *filename) |
d02ed0bb | 3713 | { |
f09e2107 | 3714 | current_target.to_save_record (¤t_target, filename); |
d02ed0bb MM |
3715 | } |
3716 | ||
3717 | /* See target.h. */ | |
3718 | ||
3719 | int | |
3720 | target_supports_delete_record (void) | |
3721 | { | |
3722 | struct target_ops *t; | |
3723 | ||
3724 | for (t = current_target.beneath; t != NULL; t = t->beneath) | |
b0ed115f TT |
3725 | if (t->to_delete_record != delegate_delete_record |
3726 | && t->to_delete_record != tdefault_delete_record) | |
d02ed0bb MM |
3727 | return 1; |
3728 | ||
3729 | return 0; | |
3730 | } | |
3731 | ||
3732 | /* See target.h. */ | |
3733 | ||
3734 | void | |
3735 | target_delete_record (void) | |
3736 | { | |
07366925 | 3737 | current_target.to_delete_record (¤t_target); |
d02ed0bb MM |
3738 | } |
3739 | ||
3740 | /* See target.h. */ | |
3741 | ||
3742 | int | |
a52eab48 | 3743 | target_record_is_replaying (ptid_t ptid) |
d02ed0bb | 3744 | { |
a52eab48 | 3745 | return current_target.to_record_is_replaying (¤t_target, ptid); |
d02ed0bb MM |
3746 | } |
3747 | ||
3748 | /* See target.h. */ | |
3749 | ||
7ff27e9b MM |
3750 | int |
3751 | target_record_will_replay (ptid_t ptid, int dir) | |
3752 | { | |
3753 | return current_target.to_record_will_replay (¤t_target, ptid, dir); | |
3754 | } | |
3755 | ||
3756 | /* See target.h. */ | |
3757 | ||
797094dd MM |
3758 | void |
3759 | target_record_stop_replaying (void) | |
3760 | { | |
3761 | current_target.to_record_stop_replaying (¤t_target); | |
3762 | } | |
3763 | ||
3764 | /* See target.h. */ | |
3765 | ||
d02ed0bb MM |
3766 | void |
3767 | target_goto_record_begin (void) | |
3768 | { | |
671e76cc | 3769 | current_target.to_goto_record_begin (¤t_target); |
d02ed0bb MM |
3770 | } |
3771 | ||
3772 | /* See target.h. */ | |
3773 | ||
3774 | void | |
3775 | target_goto_record_end (void) | |
3776 | { | |
e9179bb3 | 3777 | current_target.to_goto_record_end (¤t_target); |
d02ed0bb MM |
3778 | } |
3779 | ||
3780 | /* See target.h. */ | |
3781 | ||
3782 | void | |
3783 | target_goto_record (ULONGEST insn) | |
3784 | { | |
05969c84 | 3785 | current_target.to_goto_record (¤t_target, insn); |
d02ed0bb MM |
3786 | } |
3787 | ||
67c86d06 MM |
3788 | /* See target.h. */ |
3789 | ||
3790 | void | |
3791 | target_insn_history (int size, int flags) | |
3792 | { | |
3679abfa | 3793 | current_target.to_insn_history (¤t_target, size, flags); |
67c86d06 MM |
3794 | } |
3795 | ||
3796 | /* See target.h. */ | |
3797 | ||
3798 | void | |
3799 | target_insn_history_from (ULONGEST from, int size, int flags) | |
3800 | { | |
8444ab58 | 3801 | current_target.to_insn_history_from (¤t_target, from, size, flags); |
67c86d06 MM |
3802 | } |
3803 | ||
3804 | /* See target.h. */ | |
3805 | ||
3806 | void | |
3807 | target_insn_history_range (ULONGEST begin, ULONGEST end, int flags) | |
3808 | { | |
c29302cc | 3809 | current_target.to_insn_history_range (¤t_target, begin, end, flags); |
67c86d06 MM |
3810 | } |
3811 | ||
15984c13 MM |
3812 | /* See target.h. */ |
3813 | ||
3814 | void | |
3815 | target_call_history (int size, int flags) | |
3816 | { | |
170049d4 | 3817 | current_target.to_call_history (¤t_target, size, flags); |
15984c13 MM |
3818 | } |
3819 | ||
3820 | /* See target.h. */ | |
3821 | ||
3822 | void | |
3823 | target_call_history_from (ULONGEST begin, int size, int flags) | |
3824 | { | |
16fc27d6 | 3825 | current_target.to_call_history_from (¤t_target, begin, size, flags); |
15984c13 MM |
3826 | } |
3827 | ||
3828 | /* See target.h. */ | |
3829 | ||
3830 | void | |
3831 | target_call_history_range (ULONGEST begin, ULONGEST end, int flags) | |
3832 | { | |
115d9817 | 3833 | current_target.to_call_history_range (¤t_target, begin, end, flags); |
15984c13 MM |
3834 | } |
3835 | ||
ea001bdc MM |
3836 | /* See target.h. */ |
3837 | ||
3838 | const struct frame_unwind * | |
3839 | target_get_unwinder (void) | |
3840 | { | |
ac01945b | 3841 | return current_target.to_get_unwinder (¤t_target); |
ea001bdc MM |
3842 | } |
3843 | ||
3844 | /* See target.h. */ | |
3845 | ||
3846 | const struct frame_unwind * | |
3847 | target_get_tailcall_unwinder (void) | |
3848 | { | |
ac01945b | 3849 | return current_target.to_get_tailcall_unwinder (¤t_target); |
ea001bdc MM |
3850 | } |
3851 | ||
5fff78c4 MM |
3852 | /* See target.h. */ |
3853 | ||
3854 | void | |
3855 | target_prepare_to_generate_core (void) | |
3856 | { | |
3857 | current_target.to_prepare_to_generate_core (¤t_target); | |
3858 | } | |
3859 | ||
3860 | /* See target.h. */ | |
3861 | ||
3862 | void | |
3863 | target_done_generating_core (void) | |
3864 | { | |
3865 | current_target.to_done_generating_core (¤t_target); | |
3866 | } | |
3867 | ||
c906108c | 3868 | static void |
fba45db2 | 3869 | setup_target_debug (void) |
c906108c SS |
3870 | { |
3871 | memcpy (&debug_target, ¤t_target, sizeof debug_target); | |
3872 | ||
a7068b60 | 3873 | init_debug_target (¤t_target); |
c906108c | 3874 | } |
c906108c | 3875 | \f |
c5aa993b JM |
3876 | |
3877 | static char targ_desc[] = | |
3e43a32a MS |
3878 | "Names of targets and files being debugged.\nShows the entire \ |
3879 | stack of targets currently in use (including the exec-file,\n\ | |
c906108c SS |
3880 | core-file, and process, if any), as well as the symbol file name."; |
3881 | ||
a53f3625 | 3882 | static void |
a30bf1f1 TT |
3883 | default_rcmd (struct target_ops *self, const char *command, |
3884 | struct ui_file *output) | |
a53f3625 TT |
3885 | { |
3886 | error (_("\"monitor\" command not supported by this target.")); | |
3887 | } | |
3888 | ||
96baa820 JM |
3889 | static void |
3890 | do_monitor_command (char *cmd, | |
3891 | int from_tty) | |
3892 | { | |
96baa820 JM |
3893 | target_rcmd (cmd, gdb_stdtarg); |
3894 | } | |
3895 | ||
87680a14 JB |
3896 | /* Print the name of each layers of our target stack. */ |
3897 | ||
3898 | static void | |
3899 | maintenance_print_target_stack (char *cmd, int from_tty) | |
3900 | { | |
3901 | struct target_ops *t; | |
3902 | ||
3903 | printf_filtered (_("The current target stack is:\n")); | |
3904 | ||
3905 | for (t = target_stack; t != NULL; t = t->beneath) | |
3906 | { | |
3907 | printf_filtered (" - %s (%s)\n", t->to_shortname, t->to_longname); | |
3908 | } | |
3909 | } | |
3910 | ||
372316f1 PA |
3911 | /* See target.h. */ |
3912 | ||
3913 | void | |
3914 | target_async (int enable) | |
3915 | { | |
3916 | infrun_async (enable); | |
3917 | current_target.to_async (¤t_target, enable); | |
3918 | } | |
3919 | ||
65706a29 PA |
3920 | /* See target.h. */ |
3921 | ||
3922 | void | |
3923 | target_thread_events (int enable) | |
3924 | { | |
3925 | current_target.to_thread_events (¤t_target, enable); | |
3926 | } | |
3927 | ||
329ea579 PA |
3928 | /* Controls if targets can report that they can/are async. This is |
3929 | just for maintainers to use when debugging gdb. */ | |
3930 | int target_async_permitted = 1; | |
c6ebd6cf VP |
3931 | |
3932 | /* The set command writes to this variable. If the inferior is | |
b5419e49 | 3933 | executing, target_async_permitted is *not* updated. */ |
329ea579 | 3934 | static int target_async_permitted_1 = 1; |
c6ebd6cf VP |
3935 | |
3936 | static void | |
329ea579 PA |
3937 | maint_set_target_async_command (char *args, int from_tty, |
3938 | struct cmd_list_element *c) | |
c6ebd6cf | 3939 | { |
c35b1492 | 3940 | if (have_live_inferiors ()) |
c6ebd6cf VP |
3941 | { |
3942 | target_async_permitted_1 = target_async_permitted; | |
3943 | error (_("Cannot change this setting while the inferior is running.")); | |
3944 | } | |
3945 | ||
3946 | target_async_permitted = target_async_permitted_1; | |
3947 | } | |
3948 | ||
3949 | static void | |
329ea579 PA |
3950 | maint_show_target_async_command (struct ui_file *file, int from_tty, |
3951 | struct cmd_list_element *c, | |
3952 | const char *value) | |
c6ebd6cf | 3953 | { |
3e43a32a MS |
3954 | fprintf_filtered (file, |
3955 | _("Controlling the inferior in " | |
3956 | "asynchronous mode is %s.\n"), value); | |
c6ebd6cf VP |
3957 | } |
3958 | ||
fbea99ea PA |
3959 | /* Return true if the target operates in non-stop mode even with "set |
3960 | non-stop off". */ | |
3961 | ||
3962 | static int | |
3963 | target_always_non_stop_p (void) | |
3964 | { | |
3965 | return current_target.to_always_non_stop_p (¤t_target); | |
3966 | } | |
3967 | ||
3968 | /* See target.h. */ | |
3969 | ||
3970 | int | |
3971 | target_is_non_stop_p (void) | |
3972 | { | |
3973 | return (non_stop | |
3974 | || target_non_stop_enabled == AUTO_BOOLEAN_TRUE | |
3975 | || (target_non_stop_enabled == AUTO_BOOLEAN_AUTO | |
3976 | && target_always_non_stop_p ())); | |
3977 | } | |
3978 | ||
3979 | /* Controls if targets can report that they always run in non-stop | |
3980 | mode. This is just for maintainers to use when debugging gdb. */ | |
3981 | enum auto_boolean target_non_stop_enabled = AUTO_BOOLEAN_AUTO; | |
3982 | ||
3983 | /* The set command writes to this variable. If the inferior is | |
3984 | executing, target_non_stop_enabled is *not* updated. */ | |
3985 | static enum auto_boolean target_non_stop_enabled_1 = AUTO_BOOLEAN_AUTO; | |
3986 | ||
3987 | /* Implementation of "maint set target-non-stop". */ | |
3988 | ||
3989 | static void | |
3990 | maint_set_target_non_stop_command (char *args, int from_tty, | |
3991 | struct cmd_list_element *c) | |
3992 | { | |
3993 | if (have_live_inferiors ()) | |
3994 | { | |
3995 | target_non_stop_enabled_1 = target_non_stop_enabled; | |
3996 | error (_("Cannot change this setting while the inferior is running.")); | |
3997 | } | |
3998 | ||
3999 | target_non_stop_enabled = target_non_stop_enabled_1; | |
4000 | } | |
4001 | ||
4002 | /* Implementation of "maint show target-non-stop". */ | |
4003 | ||
4004 | static void | |
4005 | maint_show_target_non_stop_command (struct ui_file *file, int from_tty, | |
4006 | struct cmd_list_element *c, | |
4007 | const char *value) | |
4008 | { | |
4009 | if (target_non_stop_enabled == AUTO_BOOLEAN_AUTO) | |
4010 | fprintf_filtered (file, | |
4011 | _("Whether the target is always in non-stop mode " | |
4012 | "is %s (currently %s).\n"), value, | |
4013 | target_always_non_stop_p () ? "on" : "off"); | |
4014 | else | |
4015 | fprintf_filtered (file, | |
4016 | _("Whether the target is always in non-stop mode " | |
4017 | "is %s.\n"), value); | |
4018 | } | |
4019 | ||
d914c394 SS |
4020 | /* Temporary copies of permission settings. */ |
4021 | ||
4022 | static int may_write_registers_1 = 1; | |
4023 | static int may_write_memory_1 = 1; | |
4024 | static int may_insert_breakpoints_1 = 1; | |
4025 | static int may_insert_tracepoints_1 = 1; | |
4026 | static int may_insert_fast_tracepoints_1 = 1; | |
4027 | static int may_stop_1 = 1; | |
4028 | ||
4029 | /* Make the user-set values match the real values again. */ | |
4030 | ||
4031 | void | |
4032 | update_target_permissions (void) | |
4033 | { | |
4034 | may_write_registers_1 = may_write_registers; | |
4035 | may_write_memory_1 = may_write_memory; | |
4036 | may_insert_breakpoints_1 = may_insert_breakpoints; | |
4037 | may_insert_tracepoints_1 = may_insert_tracepoints; | |
4038 | may_insert_fast_tracepoints_1 = may_insert_fast_tracepoints; | |
4039 | may_stop_1 = may_stop; | |
4040 | } | |
4041 | ||
4042 | /* The one function handles (most of) the permission flags in the same | |
4043 | way. */ | |
4044 | ||
4045 | static void | |
4046 | set_target_permissions (char *args, int from_tty, | |
4047 | struct cmd_list_element *c) | |
4048 | { | |
4049 | if (target_has_execution) | |
4050 | { | |
4051 | update_target_permissions (); | |
4052 | error (_("Cannot change this setting while the inferior is running.")); | |
4053 | } | |
4054 | ||
4055 | /* Make the real values match the user-changed values. */ | |
4056 | may_write_registers = may_write_registers_1; | |
4057 | may_insert_breakpoints = may_insert_breakpoints_1; | |
4058 | may_insert_tracepoints = may_insert_tracepoints_1; | |
4059 | may_insert_fast_tracepoints = may_insert_fast_tracepoints_1; | |
4060 | may_stop = may_stop_1; | |
4061 | update_observer_mode (); | |
4062 | } | |
4063 | ||
4064 | /* Set memory write permission independently of observer mode. */ | |
4065 | ||
4066 | static void | |
4067 | set_write_memory_permission (char *args, int from_tty, | |
4068 | struct cmd_list_element *c) | |
4069 | { | |
4070 | /* Make the real values match the user-changed values. */ | |
4071 | may_write_memory = may_write_memory_1; | |
4072 | update_observer_mode (); | |
4073 | } | |
4074 | ||
4075 | ||
c906108c | 4076 | void |
fba45db2 | 4077 | initialize_targets (void) |
c906108c SS |
4078 | { |
4079 | init_dummy_target (); | |
4080 | push_target (&dummy_target); | |
4081 | ||
4082 | add_info ("target", target_info, targ_desc); | |
4083 | add_info ("files", target_info, targ_desc); | |
4084 | ||
ccce17b0 | 4085 | add_setshow_zuinteger_cmd ("target", class_maintenance, &targetdebug, _("\ |
85c07804 AC |
4086 | Set target debugging."), _("\ |
4087 | Show target debugging."), _("\ | |
333dabeb | 4088 | When non-zero, target debugging is enabled. Higher numbers are more\n\ |
3cecbbbe TT |
4089 | verbose."), |
4090 | set_targetdebug, | |
ccce17b0 YQ |
4091 | show_targetdebug, |
4092 | &setdebuglist, &showdebuglist); | |
3a11626d | 4093 | |
2bc416ba | 4094 | add_setshow_boolean_cmd ("trust-readonly-sections", class_support, |
7915a72c AC |
4095 | &trust_readonly, _("\ |
4096 | Set mode for reading from readonly sections."), _("\ | |
4097 | Show mode for reading from readonly sections."), _("\ | |
3a11626d MS |
4098 | When this mode is on, memory reads from readonly sections (such as .text)\n\ |
4099 | will be read from the object file instead of from the target. This will\n\ | |
7915a72c | 4100 | result in significant performance improvement for remote targets."), |
2c5b56ce | 4101 | NULL, |
920d2a44 | 4102 | show_trust_readonly, |
e707bbc2 | 4103 | &setlist, &showlist); |
96baa820 JM |
4104 | |
4105 | add_com ("monitor", class_obscure, do_monitor_command, | |
1bedd215 | 4106 | _("Send a command to the remote monitor (remote targets only).")); |
96baa820 | 4107 | |
87680a14 JB |
4108 | add_cmd ("target-stack", class_maintenance, maintenance_print_target_stack, |
4109 | _("Print the name of each layer of the internal target stack."), | |
4110 | &maintenanceprintlist); | |
4111 | ||
c6ebd6cf VP |
4112 | add_setshow_boolean_cmd ("target-async", no_class, |
4113 | &target_async_permitted_1, _("\ | |
4114 | Set whether gdb controls the inferior in asynchronous mode."), _("\ | |
4115 | Show whether gdb controls the inferior in asynchronous mode."), _("\ | |
4116 | Tells gdb whether to control the inferior in asynchronous mode."), | |
329ea579 PA |
4117 | maint_set_target_async_command, |
4118 | maint_show_target_async_command, | |
4119 | &maintenance_set_cmdlist, | |
4120 | &maintenance_show_cmdlist); | |
c6ebd6cf | 4121 | |
fbea99ea PA |
4122 | add_setshow_auto_boolean_cmd ("target-non-stop", no_class, |
4123 | &target_non_stop_enabled_1, _("\ | |
4124 | Set whether gdb always controls the inferior in non-stop mode."), _("\ | |
4125 | Show whether gdb always controls the inferior in non-stop mode."), _("\ | |
4126 | Tells gdb whether to control the inferior in non-stop mode."), | |
4127 | maint_set_target_non_stop_command, | |
4128 | maint_show_target_non_stop_command, | |
4129 | &maintenance_set_cmdlist, | |
4130 | &maintenance_show_cmdlist); | |
4131 | ||
d914c394 SS |
4132 | add_setshow_boolean_cmd ("may-write-registers", class_support, |
4133 | &may_write_registers_1, _("\ | |
4134 | Set permission to write into registers."), _("\ | |
4135 | Show permission to write into registers."), _("\ | |
4136 | When this permission is on, GDB may write into the target's registers.\n\ | |
4137 | Otherwise, any sort of write attempt will result in an error."), | |
4138 | set_target_permissions, NULL, | |
4139 | &setlist, &showlist); | |
4140 | ||
4141 | add_setshow_boolean_cmd ("may-write-memory", class_support, | |
4142 | &may_write_memory_1, _("\ | |
4143 | Set permission to write into target memory."), _("\ | |
4144 | Show permission to write into target memory."), _("\ | |
4145 | When this permission is on, GDB may write into the target's memory.\n\ | |
4146 | Otherwise, any sort of write attempt will result in an error."), | |
4147 | set_write_memory_permission, NULL, | |
4148 | &setlist, &showlist); | |
4149 | ||
4150 | add_setshow_boolean_cmd ("may-insert-breakpoints", class_support, | |
4151 | &may_insert_breakpoints_1, _("\ | |
4152 | Set permission to insert breakpoints in the target."), _("\ | |
4153 | Show permission to insert breakpoints in the target."), _("\ | |
4154 | When this permission is on, GDB may insert breakpoints in the program.\n\ | |
4155 | Otherwise, any sort of insertion attempt will result in an error."), | |
4156 | set_target_permissions, NULL, | |
4157 | &setlist, &showlist); | |
4158 | ||
4159 | add_setshow_boolean_cmd ("may-insert-tracepoints", class_support, | |
4160 | &may_insert_tracepoints_1, _("\ | |
4161 | Set permission to insert tracepoints in the target."), _("\ | |
4162 | Show permission to insert tracepoints in the target."), _("\ | |
4163 | When this permission is on, GDB may insert tracepoints in the program.\n\ | |
4164 | Otherwise, any sort of insertion attempt will result in an error."), | |
4165 | set_target_permissions, NULL, | |
4166 | &setlist, &showlist); | |
4167 | ||
4168 | add_setshow_boolean_cmd ("may-insert-fast-tracepoints", class_support, | |
4169 | &may_insert_fast_tracepoints_1, _("\ | |
4170 | Set permission to insert fast tracepoints in the target."), _("\ | |
4171 | Show permission to insert fast tracepoints in the target."), _("\ | |
4172 | When this permission is on, GDB may insert fast tracepoints.\n\ | |
4173 | Otherwise, any sort of insertion attempt will result in an error."), | |
4174 | set_target_permissions, NULL, | |
4175 | &setlist, &showlist); | |
4176 | ||
4177 | add_setshow_boolean_cmd ("may-interrupt", class_support, | |
4178 | &may_stop_1, _("\ | |
4179 | Set permission to interrupt or signal the target."), _("\ | |
4180 | Show permission to interrupt or signal the target."), _("\ | |
4181 | When this permission is on, GDB may interrupt/stop the target's execution.\n\ | |
4182 | Otherwise, any attempt to interrupt or stop will be ignored."), | |
4183 | set_target_permissions, NULL, | |
4184 | &setlist, &showlist); | |
6a3cb8e8 PA |
4185 | |
4186 | add_setshow_boolean_cmd ("auto-connect-native-target", class_support, | |
4187 | &auto_connect_native_target, _("\ | |
4188 | Set whether GDB may automatically connect to the native target."), _("\ | |
4189 | Show whether GDB may automatically connect to the native target."), _("\ | |
4190 | When on, and GDB is not connected to a target yet, GDB\n\ | |
4191 | attempts \"run\" and other commands with the native target."), | |
4192 | NULL, show_auto_connect_native_target, | |
4193 | &setlist, &showlist); | |
c906108c | 4194 | } |