Commit | Line | Data |
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c906108c | 1 | /* Select target systems and architectures at runtime for GDB. |
7998dfc3 | 2 | |
61baf725 | 3 | Copyright (C) 1990-2017 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" | |
325fac50 | 48 | #include <algorithm> |
26fcd5d7 | 49 | #include "byte-vector.h" |
c906108c | 50 | |
11db9430 | 51 | static void info_target_command (char *, int); |
c906108c | 52 | |
f0f9ff95 TT |
53 | static void generic_tls_error (void) ATTRIBUTE_NORETURN; |
54 | ||
0a4f40a2 | 55 | static void default_terminal_info (struct target_ops *, const char *, int); |
c906108c | 56 | |
5009afc5 AS |
57 | static int default_watchpoint_addr_within_range (struct target_ops *, |
58 | CORE_ADDR, CORE_ADDR, int); | |
59 | ||
31568a15 TT |
60 | static int default_region_ok_for_hw_watchpoint (struct target_ops *, |
61 | CORE_ADDR, int); | |
e0d24f8d | 62 | |
a30bf1f1 | 63 | static void default_rcmd (struct target_ops *, const char *, struct ui_file *); |
a53f3625 | 64 | |
4229b31d TT |
65 | static ptid_t default_get_ada_task_ptid (struct target_ops *self, |
66 | long lwp, long tid); | |
67 | ||
098dba18 TT |
68 | static int default_follow_fork (struct target_ops *self, int follow_child, |
69 | int detach_fork); | |
70 | ||
8d657035 TT |
71 | static void default_mourn_inferior (struct target_ops *self); |
72 | ||
58a5184e TT |
73 | static int default_search_memory (struct target_ops *ops, |
74 | CORE_ADDR start_addr, | |
75 | ULONGEST search_space_len, | |
76 | const gdb_byte *pattern, | |
77 | ULONGEST pattern_len, | |
78 | CORE_ADDR *found_addrp); | |
79 | ||
936d2992 PA |
80 | static int default_verify_memory (struct target_ops *self, |
81 | const gdb_byte *data, | |
82 | CORE_ADDR memaddr, ULONGEST size); | |
83 | ||
8eaff7cd TT |
84 | static struct address_space *default_thread_address_space |
85 | (struct target_ops *self, ptid_t ptid); | |
86 | ||
c25c4a8b | 87 | static void tcomplain (void) ATTRIBUTE_NORETURN; |
c906108c | 88 | |
555bbdeb TT |
89 | static int return_zero (struct target_ops *); |
90 | ||
91 | static int return_zero_has_execution (struct target_ops *, ptid_t); | |
c906108c | 92 | |
a14ed312 | 93 | static void target_command (char *, int); |
c906108c | 94 | |
a121b7c1 | 95 | static struct target_ops *find_default_run_target (const char *); |
c906108c | 96 | |
c2250ad1 UW |
97 | static struct gdbarch *default_thread_architecture (struct target_ops *ops, |
98 | ptid_t ptid); | |
99 | ||
0b5a2719 TT |
100 | static int dummy_find_memory_regions (struct target_ops *self, |
101 | find_memory_region_ftype ignore1, | |
102 | void *ignore2); | |
103 | ||
16f796b1 TT |
104 | static char *dummy_make_corefile_notes (struct target_ops *self, |
105 | bfd *ignore1, int *ignore2); | |
106 | ||
7a114964 | 107 | static const char *default_pid_to_str (struct target_ops *ops, ptid_t ptid); |
770234d3 | 108 | |
fe31bf5b TT |
109 | static enum exec_direction_kind default_execution_direction |
110 | (struct target_ops *self); | |
111 | ||
a7068b60 TT |
112 | static struct target_ops debug_target; |
113 | ||
1101cb7b TT |
114 | #include "target-delegates.c" |
115 | ||
a14ed312 | 116 | static void init_dummy_target (void); |
c906108c | 117 | |
3cecbbbe TT |
118 | static void update_current_target (void); |
119 | ||
89a1c21a SM |
120 | /* Vector of existing target structures. */ |
121 | typedef struct target_ops *target_ops_p; | |
122 | DEF_VEC_P (target_ops_p); | |
123 | static VEC (target_ops_p) *target_structs; | |
c906108c SS |
124 | |
125 | /* The initial current target, so that there is always a semi-valid | |
126 | current target. */ | |
127 | ||
128 | static struct target_ops dummy_target; | |
129 | ||
130 | /* Top of target stack. */ | |
131 | ||
258b763a | 132 | static struct target_ops *target_stack; |
c906108c SS |
133 | |
134 | /* The target structure we are currently using to talk to a process | |
135 | or file or whatever "inferior" we have. */ | |
136 | ||
137 | struct target_ops current_target; | |
138 | ||
139 | /* Command list for target. */ | |
140 | ||
141 | static struct cmd_list_element *targetlist = NULL; | |
142 | ||
cf7a04e8 DJ |
143 | /* Nonzero if we should trust readonly sections from the |
144 | executable when reading memory. */ | |
145 | ||
146 | static int trust_readonly = 0; | |
147 | ||
8defab1a DJ |
148 | /* Nonzero if we should show true memory content including |
149 | memory breakpoint inserted by gdb. */ | |
150 | ||
151 | static int show_memory_breakpoints = 0; | |
152 | ||
d914c394 SS |
153 | /* These globals control whether GDB attempts to perform these |
154 | operations; they are useful for targets that need to prevent | |
155 | inadvertant disruption, such as in non-stop mode. */ | |
156 | ||
157 | int may_write_registers = 1; | |
158 | ||
159 | int may_write_memory = 1; | |
160 | ||
161 | int may_insert_breakpoints = 1; | |
162 | ||
163 | int may_insert_tracepoints = 1; | |
164 | ||
165 | int may_insert_fast_tracepoints = 1; | |
166 | ||
167 | int may_stop = 1; | |
168 | ||
c906108c SS |
169 | /* Non-zero if we want to see trace of target level stuff. */ |
170 | ||
ccce17b0 | 171 | static unsigned int targetdebug = 0; |
3cecbbbe TT |
172 | |
173 | static void | |
174 | set_targetdebug (char *args, int from_tty, struct cmd_list_element *c) | |
175 | { | |
176 | update_current_target (); | |
177 | } | |
178 | ||
920d2a44 AC |
179 | static void |
180 | show_targetdebug (struct ui_file *file, int from_tty, | |
181 | struct cmd_list_element *c, const char *value) | |
182 | { | |
183 | fprintf_filtered (file, _("Target debugging is %s.\n"), value); | |
184 | } | |
c906108c | 185 | |
a14ed312 | 186 | static void setup_target_debug (void); |
c906108c | 187 | |
c906108c SS |
188 | /* The user just typed 'target' without the name of a target. */ |
189 | ||
c906108c | 190 | static void |
fba45db2 | 191 | target_command (char *arg, int from_tty) |
c906108c SS |
192 | { |
193 | fputs_filtered ("Argument required (target name). Try `help target'\n", | |
194 | gdb_stdout); | |
195 | } | |
196 | ||
c35b1492 PA |
197 | /* Default target_has_* methods for process_stratum targets. */ |
198 | ||
199 | int | |
200 | default_child_has_all_memory (struct target_ops *ops) | |
201 | { | |
202 | /* If no inferior selected, then we can't read memory here. */ | |
203 | if (ptid_equal (inferior_ptid, null_ptid)) | |
204 | return 0; | |
205 | ||
206 | return 1; | |
207 | } | |
208 | ||
209 | int | |
210 | default_child_has_memory (struct target_ops *ops) | |
211 | { | |
212 | /* If no inferior selected, then we can't read memory here. */ | |
213 | if (ptid_equal (inferior_ptid, null_ptid)) | |
214 | return 0; | |
215 | ||
216 | return 1; | |
217 | } | |
218 | ||
219 | int | |
220 | default_child_has_stack (struct target_ops *ops) | |
221 | { | |
222 | /* If no inferior selected, there's no stack. */ | |
223 | if (ptid_equal (inferior_ptid, null_ptid)) | |
224 | return 0; | |
225 | ||
226 | return 1; | |
227 | } | |
228 | ||
229 | int | |
230 | default_child_has_registers (struct target_ops *ops) | |
231 | { | |
232 | /* Can't read registers from no inferior. */ | |
233 | if (ptid_equal (inferior_ptid, null_ptid)) | |
234 | return 0; | |
235 | ||
236 | return 1; | |
237 | } | |
238 | ||
239 | int | |
aeaec162 | 240 | default_child_has_execution (struct target_ops *ops, ptid_t the_ptid) |
c35b1492 PA |
241 | { |
242 | /* If there's no thread selected, then we can't make it run through | |
243 | hoops. */ | |
aeaec162 | 244 | if (ptid_equal (the_ptid, null_ptid)) |
c35b1492 PA |
245 | return 0; |
246 | ||
247 | return 1; | |
248 | } | |
249 | ||
250 | ||
251 | int | |
252 | target_has_all_memory_1 (void) | |
253 | { | |
254 | struct target_ops *t; | |
255 | ||
256 | for (t = current_target.beneath; t != NULL; t = t->beneath) | |
257 | if (t->to_has_all_memory (t)) | |
258 | return 1; | |
259 | ||
260 | return 0; | |
261 | } | |
262 | ||
263 | int | |
264 | target_has_memory_1 (void) | |
265 | { | |
266 | struct target_ops *t; | |
267 | ||
268 | for (t = current_target.beneath; t != NULL; t = t->beneath) | |
269 | if (t->to_has_memory (t)) | |
270 | return 1; | |
271 | ||
272 | return 0; | |
273 | } | |
274 | ||
275 | int | |
276 | target_has_stack_1 (void) | |
277 | { | |
278 | struct target_ops *t; | |
279 | ||
280 | for (t = current_target.beneath; t != NULL; t = t->beneath) | |
281 | if (t->to_has_stack (t)) | |
282 | return 1; | |
283 | ||
284 | return 0; | |
285 | } | |
286 | ||
287 | int | |
288 | target_has_registers_1 (void) | |
289 | { | |
290 | struct target_ops *t; | |
291 | ||
292 | for (t = current_target.beneath; t != NULL; t = t->beneath) | |
293 | if (t->to_has_registers (t)) | |
294 | return 1; | |
295 | ||
296 | return 0; | |
297 | } | |
298 | ||
299 | int | |
aeaec162 | 300 | target_has_execution_1 (ptid_t the_ptid) |
c35b1492 PA |
301 | { |
302 | struct target_ops *t; | |
303 | ||
304 | for (t = current_target.beneath; t != NULL; t = t->beneath) | |
aeaec162 | 305 | if (t->to_has_execution (t, the_ptid)) |
c35b1492 PA |
306 | return 1; |
307 | ||
308 | return 0; | |
309 | } | |
310 | ||
aeaec162 TT |
311 | int |
312 | target_has_execution_current (void) | |
313 | { | |
314 | return target_has_execution_1 (inferior_ptid); | |
315 | } | |
316 | ||
c22a2b88 TT |
317 | /* Complete initialization of T. This ensures that various fields in |
318 | T are set, if needed by the target implementation. */ | |
c906108c SS |
319 | |
320 | void | |
c22a2b88 | 321 | complete_target_initialization (struct target_ops *t) |
c906108c | 322 | { |
0088c768 | 323 | /* Provide default values for all "must have" methods. */ |
0088c768 | 324 | |
c35b1492 | 325 | if (t->to_has_all_memory == NULL) |
555bbdeb | 326 | t->to_has_all_memory = return_zero; |
c35b1492 PA |
327 | |
328 | if (t->to_has_memory == NULL) | |
555bbdeb | 329 | t->to_has_memory = return_zero; |
c35b1492 PA |
330 | |
331 | if (t->to_has_stack == NULL) | |
555bbdeb | 332 | t->to_has_stack = return_zero; |
c35b1492 PA |
333 | |
334 | if (t->to_has_registers == NULL) | |
555bbdeb | 335 | t->to_has_registers = return_zero; |
c35b1492 PA |
336 | |
337 | if (t->to_has_execution == NULL) | |
555bbdeb | 338 | t->to_has_execution = return_zero_has_execution; |
1101cb7b | 339 | |
b3ccfe11 TT |
340 | /* These methods can be called on an unpushed target and so require |
341 | a default implementation if the target might plausibly be the | |
342 | default run target. */ | |
343 | gdb_assert (t->to_can_run == NULL || (t->to_can_async_p != NULL | |
344 | && t->to_supports_non_stop != NULL)); | |
345 | ||
1101cb7b | 346 | install_delegators (t); |
c22a2b88 TT |
347 | } |
348 | ||
8981c758 TT |
349 | /* This is used to implement the various target commands. */ |
350 | ||
351 | static void | |
352 | open_target (char *args, int from_tty, struct cmd_list_element *command) | |
353 | { | |
19ba03f4 | 354 | struct target_ops *ops = (struct target_ops *) get_cmd_context (command); |
8981c758 TT |
355 | |
356 | if (targetdebug) | |
357 | fprintf_unfiltered (gdb_stdlog, "-> %s->to_open (...)\n", | |
358 | ops->to_shortname); | |
359 | ||
360 | ops->to_open (args, from_tty); | |
361 | ||
362 | if (targetdebug) | |
363 | fprintf_unfiltered (gdb_stdlog, "<- %s->to_open (%s, %d)\n", | |
364 | ops->to_shortname, args, from_tty); | |
365 | } | |
366 | ||
c22a2b88 TT |
367 | /* Add possible target architecture T to the list and add a new |
368 | command 'target T->to_shortname'. Set COMPLETER as the command's | |
369 | completer if not NULL. */ | |
370 | ||
371 | void | |
372 | add_target_with_completer (struct target_ops *t, | |
373 | completer_ftype *completer) | |
374 | { | |
375 | struct cmd_list_element *c; | |
376 | ||
377 | complete_target_initialization (t); | |
c35b1492 | 378 | |
89a1c21a | 379 | VEC_safe_push (target_ops_p, target_structs, t); |
c906108c SS |
380 | |
381 | if (targetlist == NULL) | |
1bedd215 AC |
382 | add_prefix_cmd ("target", class_run, target_command, _("\ |
383 | Connect to a target machine or process.\n\ | |
c906108c SS |
384 | The first argument is the type or protocol of the target machine.\n\ |
385 | Remaining arguments are interpreted by the target protocol. For more\n\ | |
386 | information on the arguments for a particular protocol, type\n\ | |
1bedd215 | 387 | `help target ' followed by the protocol name."), |
c906108c | 388 | &targetlist, "target ", 0, &cmdlist); |
0450cc4c | 389 | c = add_cmd (t->to_shortname, no_class, t->to_doc, &targetlist); |
8981c758 TT |
390 | set_cmd_sfunc (c, open_target); |
391 | set_cmd_context (c, t); | |
9852c492 YQ |
392 | if (completer != NULL) |
393 | set_cmd_completer (c, completer); | |
394 | } | |
395 | ||
396 | /* Add a possible target architecture to the list. */ | |
397 | ||
398 | void | |
399 | add_target (struct target_ops *t) | |
400 | { | |
401 | add_target_with_completer (t, NULL); | |
c906108c SS |
402 | } |
403 | ||
b48d48eb MM |
404 | /* See target.h. */ |
405 | ||
406 | void | |
a121b7c1 | 407 | add_deprecated_target_alias (struct target_ops *t, const char *alias) |
b48d48eb MM |
408 | { |
409 | struct cmd_list_element *c; | |
410 | char *alt; | |
411 | ||
412 | /* If we use add_alias_cmd, here, we do not get the deprecated warning, | |
413 | see PR cli/15104. */ | |
0450cc4c | 414 | c = add_cmd (alias, no_class, t->to_doc, &targetlist); |
8981c758 TT |
415 | set_cmd_sfunc (c, open_target); |
416 | set_cmd_context (c, t); | |
b48d48eb MM |
417 | alt = xstrprintf ("target %s", t->to_shortname); |
418 | deprecate_cmd (c, alt); | |
419 | } | |
420 | ||
c906108c SS |
421 | /* Stub functions */ |
422 | ||
7d85a9c0 JB |
423 | void |
424 | target_kill (void) | |
425 | { | |
423a4807 | 426 | current_target.to_kill (¤t_target); |
7d85a9c0 JB |
427 | } |
428 | ||
11cf8741 | 429 | void |
9cbe5fff | 430 | target_load (const char *arg, int from_tty) |
11cf8741 | 431 | { |
4e5d721f | 432 | target_dcache_invalidate (); |
71a9f134 | 433 | (*current_target.to_load) (¤t_target, arg, from_tty); |
11cf8741 JM |
434 | } |
435 | ||
223ffa71 | 436 | /* Define it. */ |
5842f62a | 437 | |
223ffa71 TT |
438 | enum target_terminal::terminal_state target_terminal::terminal_state |
439 | = target_terminal::terminal_is_ours; | |
5842f62a | 440 | |
223ffa71 | 441 | /* See target/target.h. */ |
5842f62a PA |
442 | |
443 | void | |
223ffa71 | 444 | target_terminal::init (void) |
5842f62a PA |
445 | { |
446 | (*current_target.to_terminal_init) (¤t_target); | |
447 | ||
448 | terminal_state = terminal_is_ours; | |
449 | } | |
450 | ||
223ffa71 | 451 | /* See target/target.h. */ |
2f99e8fc | 452 | |
d9d2d8b6 | 453 | void |
223ffa71 | 454 | target_terminal::inferior (void) |
d9d2d8b6 | 455 | { |
41fd2b0f PA |
456 | struct ui *ui = current_ui; |
457 | ||
d9d2d8b6 | 458 | /* A background resume (``run&'') should leave GDB in control of the |
3b12939d PA |
459 | terminal. */ |
460 | if (ui->prompt_state != PROMPT_BLOCKED) | |
d9d2d8b6 PA |
461 | return; |
462 | ||
215d3118 PA |
463 | /* Since we always run the inferior in the main console (unless "set |
464 | inferior-tty" is in effect), when some UI other than the main one | |
223ffa71 TT |
465 | calls target_terminal::inferior, then we leave the main UI's |
466 | terminal settings as is. */ | |
215d3118 PA |
467 | if (ui != main_ui) |
468 | return; | |
469 | ||
5842f62a PA |
470 | if (terminal_state == terminal_is_inferior) |
471 | return; | |
472 | ||
d9d2d8b6 PA |
473 | /* If GDB is resuming the inferior in the foreground, install |
474 | inferior's terminal modes. */ | |
d2f640d4 | 475 | (*current_target.to_terminal_inferior) (¤t_target); |
5842f62a | 476 | terminal_state = terminal_is_inferior; |
93692b58 PA |
477 | |
478 | /* If the user hit C-c before, pretend that it was hit right | |
479 | here. */ | |
480 | if (check_quit_flag ()) | |
481 | target_pass_ctrlc (); | |
5842f62a PA |
482 | } |
483 | ||
223ffa71 | 484 | /* See target/target.h. */ |
5842f62a PA |
485 | |
486 | void | |
223ffa71 | 487 | target_terminal::ours () |
5842f62a | 488 | { |
41fd2b0f PA |
489 | struct ui *ui = current_ui; |
490 | ||
223ffa71 | 491 | /* See target_terminal::inferior. */ |
215d3118 PA |
492 | if (ui != main_ui) |
493 | return; | |
494 | ||
5842f62a PA |
495 | if (terminal_state == terminal_is_ours) |
496 | return; | |
497 | ||
498 | (*current_target.to_terminal_ours) (¤t_target); | |
499 | terminal_state = terminal_is_ours; | |
500 | } | |
501 | ||
223ffa71 | 502 | /* See target/target.h. */ |
5842f62a PA |
503 | |
504 | void | |
223ffa71 | 505 | target_terminal::ours_for_output () |
5842f62a | 506 | { |
215d3118 PA |
507 | struct ui *ui = current_ui; |
508 | ||
223ffa71 | 509 | /* See target_terminal::inferior. */ |
215d3118 PA |
510 | if (ui != main_ui) |
511 | return; | |
512 | ||
5842f62a PA |
513 | if (terminal_state != terminal_is_inferior) |
514 | return; | |
515 | (*current_target.to_terminal_ours_for_output) (¤t_target); | |
516 | terminal_state = terminal_is_ours_for_output; | |
d9d2d8b6 | 517 | } |
136d6dae | 518 | |
223ffa71 TT |
519 | /* See target/target.h. */ |
520 | ||
521 | void | |
522 | target_terminal::info (const char *arg, int from_tty) | |
523 | { | |
524 | (*current_target.to_terminal_info) (¤t_target, arg, from_tty); | |
525 | } | |
526 | ||
b0ed115f TT |
527 | /* See target.h. */ |
528 | ||
529 | int | |
530 | target_supports_terminal_ours (void) | |
531 | { | |
532 | struct target_ops *t; | |
533 | ||
534 | for (t = current_target.beneath; t != NULL; t = t->beneath) | |
535 | { | |
536 | if (t->to_terminal_ours != delegate_terminal_ours | |
537 | && t->to_terminal_ours != tdefault_terminal_ours) | |
538 | return 1; | |
539 | } | |
540 | ||
541 | return 0; | |
542 | } | |
543 | ||
c906108c | 544 | static void |
fba45db2 | 545 | tcomplain (void) |
c906108c | 546 | { |
8a3fe4f8 | 547 | error (_("You can't do that when your target is `%s'"), |
c906108c SS |
548 | current_target.to_shortname); |
549 | } | |
550 | ||
551 | void | |
fba45db2 | 552 | noprocess (void) |
c906108c | 553 | { |
8a3fe4f8 | 554 | error (_("You can't do that without a process to debug.")); |
c906108c SS |
555 | } |
556 | ||
c906108c | 557 | static void |
0a4f40a2 | 558 | default_terminal_info (struct target_ops *self, const char *args, int from_tty) |
c906108c | 559 | { |
a3f17187 | 560 | printf_unfiltered (_("No saved terminal information.\n")); |
c906108c SS |
561 | } |
562 | ||
0ef643c8 JB |
563 | /* A default implementation for the to_get_ada_task_ptid target method. |
564 | ||
565 | This function builds the PTID by using both LWP and TID as part of | |
566 | the PTID lwp and tid elements. The pid used is the pid of the | |
567 | inferior_ptid. */ | |
568 | ||
2c0b251b | 569 | static ptid_t |
1e6b91a4 | 570 | default_get_ada_task_ptid (struct target_ops *self, long lwp, long tid) |
0ef643c8 JB |
571 | { |
572 | return ptid_build (ptid_get_pid (inferior_ptid), lwp, tid); | |
573 | } | |
574 | ||
32231432 | 575 | static enum exec_direction_kind |
4c612759 | 576 | default_execution_direction (struct target_ops *self) |
32231432 PA |
577 | { |
578 | if (!target_can_execute_reverse) | |
579 | return EXEC_FORWARD; | |
580 | else if (!target_can_async_p ()) | |
581 | return EXEC_FORWARD; | |
582 | else | |
583 | gdb_assert_not_reached ("\ | |
584 | to_execution_direction must be implemented for reverse async"); | |
585 | } | |
586 | ||
7998dfc3 AC |
587 | /* Go through the target stack from top to bottom, copying over zero |
588 | entries in current_target, then filling in still empty entries. In | |
589 | effect, we are doing class inheritance through the pushed target | |
590 | vectors. | |
591 | ||
592 | NOTE: cagney/2003-10-17: The problem with this inheritance, as it | |
593 | is currently implemented, is that it discards any knowledge of | |
594 | which target an inherited method originally belonged to. | |
595 | Consequently, new new target methods should instead explicitly and | |
596 | locally search the target stack for the target that can handle the | |
597 | request. */ | |
c906108c SS |
598 | |
599 | static void | |
7998dfc3 | 600 | update_current_target (void) |
c906108c | 601 | { |
7998dfc3 AC |
602 | struct target_ops *t; |
603 | ||
08d8bcd7 | 604 | /* First, reset current's contents. */ |
7998dfc3 AC |
605 | memset (¤t_target, 0, sizeof (current_target)); |
606 | ||
1101cb7b TT |
607 | /* Install the delegators. */ |
608 | install_delegators (¤t_target); | |
609 | ||
be4ddd36 TT |
610 | current_target.to_stratum = target_stack->to_stratum; |
611 | ||
7998dfc3 AC |
612 | #define INHERIT(FIELD, TARGET) \ |
613 | if (!current_target.FIELD) \ | |
614 | current_target.FIELD = (TARGET)->FIELD | |
615 | ||
be4ddd36 TT |
616 | /* Do not add any new INHERITs here. Instead, use the delegation |
617 | mechanism provided by make-target-delegates. */ | |
7998dfc3 AC |
618 | for (t = target_stack; t; t = t->beneath) |
619 | { | |
620 | INHERIT (to_shortname, t); | |
621 | INHERIT (to_longname, t); | |
dc177b7a | 622 | INHERIT (to_attach_no_wait, t); |
74174d2e | 623 | INHERIT (to_have_steppable_watchpoint, t); |
7998dfc3 | 624 | INHERIT (to_have_continuable_watchpoint, t); |
7998dfc3 | 625 | INHERIT (to_has_thread_control, t); |
7998dfc3 AC |
626 | } |
627 | #undef INHERIT | |
628 | ||
7998dfc3 AC |
629 | /* Finally, position the target-stack beneath the squashed |
630 | "current_target". That way code looking for a non-inherited | |
631 | target method can quickly and simply find it. */ | |
632 | current_target.beneath = target_stack; | |
b4b61fdb DJ |
633 | |
634 | if (targetdebug) | |
635 | setup_target_debug (); | |
c906108c SS |
636 | } |
637 | ||
638 | /* Push a new target type into the stack of the existing target accessors, | |
639 | possibly superseding some of the existing accessors. | |
640 | ||
c906108c SS |
641 | Rather than allow an empty stack, we always have the dummy target at |
642 | the bottom stratum, so we can call the function vectors without | |
643 | checking them. */ | |
644 | ||
b26a4dcb | 645 | void |
fba45db2 | 646 | push_target (struct target_ops *t) |
c906108c | 647 | { |
258b763a | 648 | struct target_ops **cur; |
c906108c SS |
649 | |
650 | /* Check magic number. If wrong, it probably means someone changed | |
651 | the struct definition, but not all the places that initialize one. */ | |
652 | if (t->to_magic != OPS_MAGIC) | |
653 | { | |
c5aa993b JM |
654 | fprintf_unfiltered (gdb_stderr, |
655 | "Magic number of %s target struct wrong\n", | |
656 | t->to_shortname); | |
3e43a32a MS |
657 | internal_error (__FILE__, __LINE__, |
658 | _("failed internal consistency check")); | |
c906108c SS |
659 | } |
660 | ||
258b763a AC |
661 | /* Find the proper stratum to install this target in. */ |
662 | for (cur = &target_stack; (*cur) != NULL; cur = &(*cur)->beneath) | |
c906108c | 663 | { |
258b763a | 664 | if ((int) (t->to_stratum) >= (int) (*cur)->to_stratum) |
c906108c SS |
665 | break; |
666 | } | |
667 | ||
258b763a | 668 | /* If there's already targets at this stratum, remove them. */ |
88c231eb | 669 | /* FIXME: cagney/2003-10-15: I think this should be popping all |
258b763a AC |
670 | targets to CUR, and not just those at this stratum level. */ |
671 | while ((*cur) != NULL && t->to_stratum == (*cur)->to_stratum) | |
672 | { | |
673 | /* There's already something at this stratum level. Close it, | |
674 | and un-hook it from the stack. */ | |
675 | struct target_ops *tmp = (*cur); | |
5d502164 | 676 | |
258b763a AC |
677 | (*cur) = (*cur)->beneath; |
678 | tmp->beneath = NULL; | |
460014f5 | 679 | target_close (tmp); |
258b763a | 680 | } |
c906108c SS |
681 | |
682 | /* We have removed all targets in our stratum, now add the new one. */ | |
258b763a AC |
683 | t->beneath = (*cur); |
684 | (*cur) = t; | |
c906108c SS |
685 | |
686 | update_current_target (); | |
c906108c SS |
687 | } |
688 | ||
2bc416ba | 689 | /* Remove a target_ops vector from the stack, wherever it may be. |
c906108c SS |
690 | Return how many times it was removed (0 or 1). */ |
691 | ||
692 | int | |
fba45db2 | 693 | unpush_target (struct target_ops *t) |
c906108c | 694 | { |
258b763a AC |
695 | struct target_ops **cur; |
696 | struct target_ops *tmp; | |
c906108c | 697 | |
c8d104ad PA |
698 | if (t->to_stratum == dummy_stratum) |
699 | internal_error (__FILE__, __LINE__, | |
9b20d036 | 700 | _("Attempt to unpush the dummy target")); |
c8d104ad | 701 | |
c906108c | 702 | /* Look for the specified target. Note that we assume that a target |
c378eb4e | 703 | can only occur once in the target stack. */ |
c906108c | 704 | |
258b763a AC |
705 | for (cur = &target_stack; (*cur) != NULL; cur = &(*cur)->beneath) |
706 | { | |
707 | if ((*cur) == t) | |
708 | break; | |
709 | } | |
c906108c | 710 | |
305436e0 PA |
711 | /* If we don't find target_ops, quit. Only open targets should be |
712 | closed. */ | |
258b763a | 713 | if ((*cur) == NULL) |
305436e0 | 714 | return 0; |
5269965e | 715 | |
c378eb4e | 716 | /* Unchain the target. */ |
258b763a AC |
717 | tmp = (*cur); |
718 | (*cur) = (*cur)->beneath; | |
719 | tmp->beneath = NULL; | |
c906108c SS |
720 | |
721 | update_current_target (); | |
c906108c | 722 | |
305436e0 PA |
723 | /* Finally close the target. Note we do this after unchaining, so |
724 | any target method calls from within the target_close | |
725 | implementation don't end up in T anymore. */ | |
460014f5 | 726 | target_close (t); |
305436e0 | 727 | |
c906108c SS |
728 | return 1; |
729 | } | |
730 | ||
915ef8b1 PA |
731 | /* Unpush TARGET and assert that it worked. */ |
732 | ||
733 | static void | |
734 | unpush_target_and_assert (struct target_ops *target) | |
735 | { | |
736 | if (!unpush_target (target)) | |
737 | { | |
738 | fprintf_unfiltered (gdb_stderr, | |
739 | "pop_all_targets couldn't find target %s\n", | |
740 | target->to_shortname); | |
741 | internal_error (__FILE__, __LINE__, | |
742 | _("failed internal consistency check")); | |
743 | } | |
744 | } | |
745 | ||
aa76d38d | 746 | void |
460014f5 | 747 | pop_all_targets_above (enum strata above_stratum) |
aa76d38d | 748 | { |
87ab71f0 | 749 | while ((int) (current_target.to_stratum) > (int) above_stratum) |
915ef8b1 PA |
750 | unpush_target_and_assert (target_stack); |
751 | } | |
752 | ||
753 | /* See target.h. */ | |
754 | ||
755 | void | |
756 | pop_all_targets_at_and_above (enum strata stratum) | |
757 | { | |
758 | while ((int) (current_target.to_stratum) >= (int) stratum) | |
759 | unpush_target_and_assert (target_stack); | |
aa76d38d PA |
760 | } |
761 | ||
87ab71f0 | 762 | void |
460014f5 | 763 | pop_all_targets (void) |
87ab71f0 | 764 | { |
460014f5 | 765 | pop_all_targets_above (dummy_stratum); |
87ab71f0 PA |
766 | } |
767 | ||
c0edd9ed JK |
768 | /* Return 1 if T is now pushed in the target stack. Return 0 otherwise. */ |
769 | ||
770 | int | |
771 | target_is_pushed (struct target_ops *t) | |
772 | { | |
84202f9c | 773 | struct target_ops *cur; |
c0edd9ed JK |
774 | |
775 | /* Check magic number. If wrong, it probably means someone changed | |
776 | the struct definition, but not all the places that initialize one. */ | |
777 | if (t->to_magic != OPS_MAGIC) | |
778 | { | |
779 | fprintf_unfiltered (gdb_stderr, | |
780 | "Magic number of %s target struct wrong\n", | |
781 | t->to_shortname); | |
3e43a32a MS |
782 | internal_error (__FILE__, __LINE__, |
783 | _("failed internal consistency check")); | |
c0edd9ed JK |
784 | } |
785 | ||
84202f9c TT |
786 | for (cur = target_stack; cur != NULL; cur = cur->beneath) |
787 | if (cur == t) | |
c0edd9ed JK |
788 | return 1; |
789 | ||
790 | return 0; | |
791 | } | |
792 | ||
f0f9ff95 TT |
793 | /* Default implementation of to_get_thread_local_address. */ |
794 | ||
795 | static void | |
796 | generic_tls_error (void) | |
797 | { | |
798 | throw_error (TLS_GENERIC_ERROR, | |
799 | _("Cannot find thread-local variables on this target")); | |
800 | } | |
801 | ||
72f5cf0e | 802 | /* Using the objfile specified in OBJFILE, find the address for the |
9e35dae4 DJ |
803 | current thread's thread-local storage with offset OFFSET. */ |
804 | CORE_ADDR | |
805 | target_translate_tls_address (struct objfile *objfile, CORE_ADDR offset) | |
806 | { | |
807 | volatile CORE_ADDR addr = 0; | |
f0f9ff95 | 808 | struct target_ops *target = ¤t_target; |
9e35dae4 | 809 | |
f0f9ff95 | 810 | if (gdbarch_fetch_tls_load_module_address_p (target_gdbarch ())) |
9e35dae4 DJ |
811 | { |
812 | ptid_t ptid = inferior_ptid; | |
9e35dae4 | 813 | |
492d29ea | 814 | TRY |
9e35dae4 DJ |
815 | { |
816 | CORE_ADDR lm_addr; | |
817 | ||
818 | /* Fetch the load module address for this objfile. */ | |
f5656ead | 819 | lm_addr = gdbarch_fetch_tls_load_module_address (target_gdbarch (), |
9e35dae4 | 820 | objfile); |
9e35dae4 | 821 | |
3e43a32a MS |
822 | addr = target->to_get_thread_local_address (target, ptid, |
823 | lm_addr, offset); | |
9e35dae4 DJ |
824 | } |
825 | /* If an error occurred, print TLS related messages here. Otherwise, | |
826 | throw the error to some higher catcher. */ | |
492d29ea | 827 | CATCH (ex, RETURN_MASK_ALL) |
9e35dae4 DJ |
828 | { |
829 | int objfile_is_library = (objfile->flags & OBJF_SHARED); | |
830 | ||
831 | switch (ex.error) | |
832 | { | |
833 | case TLS_NO_LIBRARY_SUPPORT_ERROR: | |
3e43a32a MS |
834 | error (_("Cannot find thread-local variables " |
835 | "in this thread library.")); | |
9e35dae4 DJ |
836 | break; |
837 | case TLS_LOAD_MODULE_NOT_FOUND_ERROR: | |
838 | if (objfile_is_library) | |
839 | error (_("Cannot find shared library `%s' in dynamic" | |
4262abfb | 840 | " linker's load module list"), objfile_name (objfile)); |
9e35dae4 DJ |
841 | else |
842 | error (_("Cannot find executable file `%s' in dynamic" | |
4262abfb | 843 | " linker's load module list"), objfile_name (objfile)); |
9e35dae4 DJ |
844 | break; |
845 | case TLS_NOT_ALLOCATED_YET_ERROR: | |
846 | if (objfile_is_library) | |
847 | error (_("The inferior has not yet allocated storage for" | |
848 | " thread-local variables in\n" | |
849 | "the shared library `%s'\n" | |
850 | "for %s"), | |
4262abfb | 851 | objfile_name (objfile), target_pid_to_str (ptid)); |
9e35dae4 DJ |
852 | else |
853 | error (_("The inferior has not yet allocated storage for" | |
854 | " thread-local variables in\n" | |
855 | "the executable `%s'\n" | |
856 | "for %s"), | |
4262abfb | 857 | objfile_name (objfile), target_pid_to_str (ptid)); |
9e35dae4 DJ |
858 | break; |
859 | case TLS_GENERIC_ERROR: | |
860 | if (objfile_is_library) | |
861 | error (_("Cannot find thread-local storage for %s, " | |
862 | "shared library %s:\n%s"), | |
863 | target_pid_to_str (ptid), | |
4262abfb | 864 | objfile_name (objfile), ex.message); |
9e35dae4 DJ |
865 | else |
866 | error (_("Cannot find thread-local storage for %s, " | |
867 | "executable file %s:\n%s"), | |
868 | target_pid_to_str (ptid), | |
4262abfb | 869 | objfile_name (objfile), ex.message); |
9e35dae4 DJ |
870 | break; |
871 | default: | |
872 | throw_exception (ex); | |
873 | break; | |
874 | } | |
875 | } | |
492d29ea | 876 | END_CATCH |
9e35dae4 DJ |
877 | } |
878 | /* It wouldn't be wrong here to try a gdbarch method, too; finding | |
879 | TLS is an ABI-specific thing. But we don't do that yet. */ | |
880 | else | |
881 | error (_("Cannot find thread-local variables on this target")); | |
882 | ||
883 | return addr; | |
884 | } | |
885 | ||
6be7b56e | 886 | const char * |
01cb8804 | 887 | target_xfer_status_to_string (enum target_xfer_status status) |
6be7b56e PA |
888 | { |
889 | #define CASE(X) case X: return #X | |
01cb8804 | 890 | switch (status) |
6be7b56e PA |
891 | { |
892 | CASE(TARGET_XFER_E_IO); | |
bc113b4e | 893 | CASE(TARGET_XFER_UNAVAILABLE); |
6be7b56e PA |
894 | default: |
895 | return "<unknown>"; | |
896 | } | |
897 | #undef CASE | |
898 | }; | |
899 | ||
900 | ||
c906108c SS |
901 | #undef MIN |
902 | #define MIN(A, B) (((A) <= (B)) ? (A) : (B)) | |
903 | ||
904 | /* target_read_string -- read a null terminated string, up to LEN bytes, | |
905 | from MEMADDR in target. Set *ERRNOP to the errno code, or 0 if successful. | |
906 | Set *STRING to a pointer to malloc'd memory containing the data; the caller | |
907 | is responsible for freeing it. Return the number of bytes successfully | |
908 | read. */ | |
909 | ||
910 | int | |
fba45db2 | 911 | target_read_string (CORE_ADDR memaddr, char **string, int len, int *errnop) |
c906108c | 912 | { |
c2e8b827 | 913 | int tlen, offset, i; |
1b0ba102 | 914 | gdb_byte buf[4]; |
c906108c SS |
915 | int errcode = 0; |
916 | char *buffer; | |
917 | int buffer_allocated; | |
918 | char *bufptr; | |
919 | unsigned int nbytes_read = 0; | |
920 | ||
6217bf3e MS |
921 | gdb_assert (string); |
922 | ||
c906108c SS |
923 | /* Small for testing. */ |
924 | buffer_allocated = 4; | |
224c3ddb | 925 | buffer = (char *) xmalloc (buffer_allocated); |
c906108c SS |
926 | bufptr = buffer; |
927 | ||
c906108c SS |
928 | while (len > 0) |
929 | { | |
930 | tlen = MIN (len, 4 - (memaddr & 3)); | |
931 | offset = memaddr & 3; | |
932 | ||
1b0ba102 | 933 | errcode = target_read_memory (memaddr & ~3, buf, sizeof buf); |
c906108c SS |
934 | if (errcode != 0) |
935 | { | |
936 | /* The transfer request might have crossed the boundary to an | |
c378eb4e | 937 | unallocated region of memory. Retry the transfer, requesting |
c906108c SS |
938 | a single byte. */ |
939 | tlen = 1; | |
940 | offset = 0; | |
b8eb5af0 | 941 | errcode = target_read_memory (memaddr, buf, 1); |
c906108c SS |
942 | if (errcode != 0) |
943 | goto done; | |
944 | } | |
945 | ||
946 | if (bufptr - buffer + tlen > buffer_allocated) | |
947 | { | |
948 | unsigned int bytes; | |
5d502164 | 949 | |
c906108c SS |
950 | bytes = bufptr - buffer; |
951 | buffer_allocated *= 2; | |
224c3ddb | 952 | buffer = (char *) xrealloc (buffer, buffer_allocated); |
c906108c SS |
953 | bufptr = buffer + bytes; |
954 | } | |
955 | ||
956 | for (i = 0; i < tlen; i++) | |
957 | { | |
958 | *bufptr++ = buf[i + offset]; | |
959 | if (buf[i + offset] == '\000') | |
960 | { | |
961 | nbytes_read += i + 1; | |
962 | goto done; | |
963 | } | |
964 | } | |
965 | ||
966 | memaddr += tlen; | |
967 | len -= tlen; | |
968 | nbytes_read += tlen; | |
969 | } | |
c5aa993b | 970 | done: |
6217bf3e | 971 | *string = buffer; |
c906108c SS |
972 | if (errnop != NULL) |
973 | *errnop = errcode; | |
c906108c SS |
974 | return nbytes_read; |
975 | } | |
976 | ||
07b82ea5 PA |
977 | struct target_section_table * |
978 | target_get_section_table (struct target_ops *target) | |
979 | { | |
7e35c012 | 980 | return (*target->to_get_section_table) (target); |
07b82ea5 PA |
981 | } |
982 | ||
8db32d44 | 983 | /* Find a section containing ADDR. */ |
07b82ea5 | 984 | |
0542c86d | 985 | struct target_section * |
8db32d44 AC |
986 | target_section_by_addr (struct target_ops *target, CORE_ADDR addr) |
987 | { | |
07b82ea5 | 988 | struct target_section_table *table = target_get_section_table (target); |
0542c86d | 989 | struct target_section *secp; |
07b82ea5 PA |
990 | |
991 | if (table == NULL) | |
992 | return NULL; | |
993 | ||
994 | for (secp = table->sections; secp < table->sections_end; secp++) | |
8db32d44 AC |
995 | { |
996 | if (addr >= secp->addr && addr < secp->endaddr) | |
997 | return secp; | |
998 | } | |
999 | return NULL; | |
1000 | } | |
1001 | ||
0fec99e8 PA |
1002 | |
1003 | /* Helper for the memory xfer routines. Checks the attributes of the | |
1004 | memory region of MEMADDR against the read or write being attempted. | |
1005 | If the access is permitted returns true, otherwise returns false. | |
1006 | REGION_P is an optional output parameter. If not-NULL, it is | |
1007 | filled with a pointer to the memory region of MEMADDR. REG_LEN | |
1008 | returns LEN trimmed to the end of the region. This is how much the | |
1009 | caller can continue requesting, if the access is permitted. A | |
1010 | single xfer request must not straddle memory region boundaries. */ | |
1011 | ||
1012 | static int | |
1013 | memory_xfer_check_region (gdb_byte *readbuf, const gdb_byte *writebuf, | |
1014 | ULONGEST memaddr, ULONGEST len, ULONGEST *reg_len, | |
1015 | struct mem_region **region_p) | |
1016 | { | |
1017 | struct mem_region *region; | |
1018 | ||
1019 | region = lookup_mem_region (memaddr); | |
1020 | ||
1021 | if (region_p != NULL) | |
1022 | *region_p = region; | |
1023 | ||
1024 | switch (region->attrib.mode) | |
1025 | { | |
1026 | case MEM_RO: | |
1027 | if (writebuf != NULL) | |
1028 | return 0; | |
1029 | break; | |
1030 | ||
1031 | case MEM_WO: | |
1032 | if (readbuf != NULL) | |
1033 | return 0; | |
1034 | break; | |
1035 | ||
1036 | case MEM_FLASH: | |
1037 | /* We only support writing to flash during "load" for now. */ | |
1038 | if (writebuf != NULL) | |
1039 | error (_("Writing to flash memory forbidden in this context")); | |
1040 | break; | |
1041 | ||
1042 | case MEM_NONE: | |
1043 | return 0; | |
1044 | } | |
1045 | ||
1046 | /* region->hi == 0 means there's no upper bound. */ | |
1047 | if (memaddr + len < region->hi || region->hi == 0) | |
1048 | *reg_len = len; | |
1049 | else | |
1050 | *reg_len = region->hi - memaddr; | |
1051 | ||
1052 | return 1; | |
1053 | } | |
1054 | ||
9f713294 YQ |
1055 | /* Read memory from more than one valid target. A core file, for |
1056 | instance, could have some of memory but delegate other bits to | |
1057 | the target below it. So, we must manually try all targets. */ | |
1058 | ||
cc9f16aa | 1059 | enum target_xfer_status |
17fde6d0 | 1060 | raw_memory_xfer_partial (struct target_ops *ops, gdb_byte *readbuf, |
9b409511 YQ |
1061 | const gdb_byte *writebuf, ULONGEST memaddr, LONGEST len, |
1062 | ULONGEST *xfered_len) | |
9f713294 | 1063 | { |
9b409511 | 1064 | enum target_xfer_status res; |
9f713294 YQ |
1065 | |
1066 | do | |
1067 | { | |
1068 | res = ops->to_xfer_partial (ops, TARGET_OBJECT_MEMORY, NULL, | |
9b409511 YQ |
1069 | readbuf, writebuf, memaddr, len, |
1070 | xfered_len); | |
1071 | if (res == TARGET_XFER_OK) | |
9f713294 YQ |
1072 | break; |
1073 | ||
633785ff | 1074 | /* Stop if the target reports that the memory is not available. */ |
bc113b4e | 1075 | if (res == TARGET_XFER_UNAVAILABLE) |
633785ff MM |
1076 | break; |
1077 | ||
9f713294 YQ |
1078 | /* We want to continue past core files to executables, but not |
1079 | past a running target's memory. */ | |
1080 | if (ops->to_has_all_memory (ops)) | |
1081 | break; | |
1082 | ||
1083 | ops = ops->beneath; | |
1084 | } | |
1085 | while (ops != NULL); | |
1086 | ||
0f26cec1 PA |
1087 | /* The cache works at the raw memory level. Make sure the cache |
1088 | gets updated with raw contents no matter what kind of memory | |
1089 | object was originally being written. Note we do write-through | |
1090 | first, so that if it fails, we don't write to the cache contents | |
1091 | that never made it to the target. */ | |
1092 | if (writebuf != NULL | |
1093 | && !ptid_equal (inferior_ptid, null_ptid) | |
1094 | && target_dcache_init_p () | |
1095 | && (stack_cache_enabled_p () || code_cache_enabled_p ())) | |
1096 | { | |
1097 | DCACHE *dcache = target_dcache_get (); | |
1098 | ||
1099 | /* Note that writing to an area of memory which wasn't present | |
1100 | in the cache doesn't cause it to be loaded in. */ | |
1101 | dcache_update (dcache, res, memaddr, writebuf, *xfered_len); | |
1102 | } | |
1103 | ||
9f713294 YQ |
1104 | return res; |
1105 | } | |
1106 | ||
7f79c47e DE |
1107 | /* Perform a partial memory transfer. |
1108 | For docs see target.h, to_xfer_partial. */ | |
cf7a04e8 | 1109 | |
9b409511 | 1110 | static enum target_xfer_status |
f0ba3972 | 1111 | memory_xfer_partial_1 (struct target_ops *ops, enum target_object object, |
17fde6d0 | 1112 | gdb_byte *readbuf, const gdb_byte *writebuf, ULONGEST memaddr, |
9b409511 | 1113 | ULONGEST len, ULONGEST *xfered_len) |
0779438d | 1114 | { |
9b409511 | 1115 | enum target_xfer_status res; |
0fec99e8 | 1116 | ULONGEST reg_len; |
cf7a04e8 | 1117 | struct mem_region *region; |
4e5d721f | 1118 | struct inferior *inf; |
cf7a04e8 | 1119 | |
07b82ea5 PA |
1120 | /* For accesses to unmapped overlay sections, read directly from |
1121 | files. Must do this first, as MEMADDR may need adjustment. */ | |
1122 | if (readbuf != NULL && overlay_debugging) | |
1123 | { | |
1124 | struct obj_section *section = find_pc_overlay (memaddr); | |
5d502164 | 1125 | |
07b82ea5 PA |
1126 | if (pc_in_unmapped_range (memaddr, section)) |
1127 | { | |
1128 | struct target_section_table *table | |
1129 | = target_get_section_table (ops); | |
1130 | const char *section_name = section->the_bfd_section->name; | |
5d502164 | 1131 | |
07b82ea5 PA |
1132 | memaddr = overlay_mapped_address (memaddr, section); |
1133 | return section_table_xfer_memory_partial (readbuf, writebuf, | |
9b409511 | 1134 | memaddr, len, xfered_len, |
07b82ea5 PA |
1135 | table->sections, |
1136 | table->sections_end, | |
1137 | section_name); | |
1138 | } | |
1139 | } | |
1140 | ||
1141 | /* Try the executable files, if "trust-readonly-sections" is set. */ | |
cf7a04e8 DJ |
1142 | if (readbuf != NULL && trust_readonly) |
1143 | { | |
0542c86d | 1144 | struct target_section *secp; |
07b82ea5 | 1145 | struct target_section_table *table; |
cf7a04e8 DJ |
1146 | |
1147 | secp = target_section_by_addr (ops, memaddr); | |
1148 | if (secp != NULL | |
2b2848e2 DE |
1149 | && (bfd_get_section_flags (secp->the_bfd_section->owner, |
1150 | secp->the_bfd_section) | |
cf7a04e8 | 1151 | & SEC_READONLY)) |
07b82ea5 PA |
1152 | { |
1153 | table = target_get_section_table (ops); | |
1154 | return section_table_xfer_memory_partial (readbuf, writebuf, | |
9b409511 | 1155 | memaddr, len, xfered_len, |
07b82ea5 PA |
1156 | table->sections, |
1157 | table->sections_end, | |
1158 | NULL); | |
1159 | } | |
98646950 UW |
1160 | } |
1161 | ||
cf7a04e8 | 1162 | /* Try GDB's internal data cache. */ |
cf7a04e8 | 1163 | |
0fec99e8 PA |
1164 | if (!memory_xfer_check_region (readbuf, writebuf, memaddr, len, ®_len, |
1165 | ®ion)) | |
1166 | return TARGET_XFER_E_IO; | |
cf7a04e8 | 1167 | |
6c95b8df | 1168 | if (!ptid_equal (inferior_ptid, null_ptid)) |
c9657e70 | 1169 | inf = find_inferior_ptid (inferior_ptid); |
6c95b8df PA |
1170 | else |
1171 | inf = NULL; | |
4e5d721f DE |
1172 | |
1173 | if (inf != NULL | |
0f26cec1 | 1174 | && readbuf != NULL |
2f4d8875 PA |
1175 | /* The dcache reads whole cache lines; that doesn't play well |
1176 | with reading from a trace buffer, because reading outside of | |
1177 | the collected memory range fails. */ | |
1178 | && get_traceframe_number () == -1 | |
4e5d721f | 1179 | && (region->attrib.cache |
29453a14 YQ |
1180 | || (stack_cache_enabled_p () && object == TARGET_OBJECT_STACK_MEMORY) |
1181 | || (code_cache_enabled_p () && object == TARGET_OBJECT_CODE_MEMORY))) | |
cf7a04e8 | 1182 | { |
2a2f9fe4 YQ |
1183 | DCACHE *dcache = target_dcache_get_or_init (); |
1184 | ||
0f26cec1 PA |
1185 | return dcache_read_memory_partial (ops, dcache, memaddr, readbuf, |
1186 | reg_len, xfered_len); | |
cf7a04e8 DJ |
1187 | } |
1188 | ||
1189 | /* If none of those methods found the memory we wanted, fall back | |
1190 | to a target partial transfer. Normally a single call to | |
1191 | to_xfer_partial is enough; if it doesn't recognize an object | |
1192 | it will call the to_xfer_partial of the next target down. | |
1193 | But for memory this won't do. Memory is the only target | |
9b409511 YQ |
1194 | object which can be read from more than one valid target. |
1195 | A core file, for instance, could have some of memory but | |
1196 | delegate other bits to the target below it. So, we must | |
1197 | manually try all targets. */ | |
1198 | ||
1199 | res = raw_memory_xfer_partial (ops, readbuf, writebuf, memaddr, reg_len, | |
1200 | xfered_len); | |
cf7a04e8 DJ |
1201 | |
1202 | /* If we still haven't got anything, return the last error. We | |
1203 | give up. */ | |
1204 | return res; | |
0779438d AC |
1205 | } |
1206 | ||
f0ba3972 PA |
1207 | /* Perform a partial memory transfer. For docs see target.h, |
1208 | to_xfer_partial. */ | |
1209 | ||
9b409511 | 1210 | static enum target_xfer_status |
f0ba3972 | 1211 | memory_xfer_partial (struct target_ops *ops, enum target_object object, |
9b409511 YQ |
1212 | gdb_byte *readbuf, const gdb_byte *writebuf, |
1213 | ULONGEST memaddr, ULONGEST len, ULONGEST *xfered_len) | |
f0ba3972 | 1214 | { |
9b409511 | 1215 | enum target_xfer_status res; |
f0ba3972 PA |
1216 | |
1217 | /* Zero length requests are ok and require no work. */ | |
1218 | if (len == 0) | |
9b409511 | 1219 | return TARGET_XFER_EOF; |
f0ba3972 PA |
1220 | |
1221 | /* Fill in READBUF with breakpoint shadows, or WRITEBUF with | |
1222 | breakpoint insns, thus hiding out from higher layers whether | |
1223 | there are software breakpoints inserted in the code stream. */ | |
1224 | if (readbuf != NULL) | |
1225 | { | |
9b409511 YQ |
1226 | res = memory_xfer_partial_1 (ops, object, readbuf, NULL, memaddr, len, |
1227 | xfered_len); | |
f0ba3972 | 1228 | |
9b409511 | 1229 | if (res == TARGET_XFER_OK && !show_memory_breakpoints) |
c63528fc | 1230 | breakpoint_xfer_memory (readbuf, NULL, NULL, memaddr, *xfered_len); |
f0ba3972 PA |
1231 | } |
1232 | else | |
1233 | { | |
67c059c2 AB |
1234 | /* A large write request is likely to be partially satisfied |
1235 | by memory_xfer_partial_1. We will continually malloc | |
1236 | and free a copy of the entire write request for breakpoint | |
1237 | shadow handling even though we only end up writing a small | |
09c98b44 DB |
1238 | subset of it. Cap writes to a limit specified by the target |
1239 | to mitigate this. */ | |
325fac50 | 1240 | len = std::min (ops->to_get_memory_xfer_limit (ops), len); |
67c059c2 | 1241 | |
26fcd5d7 TT |
1242 | gdb::byte_vector buf (writebuf, writebuf + len); |
1243 | breakpoint_xfer_memory (NULL, buf.data (), writebuf, memaddr, len); | |
1244 | res = memory_xfer_partial_1 (ops, object, NULL, buf.data (), memaddr, len, | |
9b409511 | 1245 | xfered_len); |
f0ba3972 PA |
1246 | } |
1247 | ||
1248 | return res; | |
1249 | } | |
1250 | ||
cb85b21b TT |
1251 | scoped_restore_tmpl<int> |
1252 | make_scoped_restore_show_memory_breakpoints (int show) | |
8defab1a | 1253 | { |
cb85b21b | 1254 | return make_scoped_restore (&show_memory_breakpoints, show); |
8defab1a DJ |
1255 | } |
1256 | ||
7f79c47e DE |
1257 | /* For docs see target.h, to_xfer_partial. */ |
1258 | ||
9b409511 | 1259 | enum target_xfer_status |
27394598 AC |
1260 | target_xfer_partial (struct target_ops *ops, |
1261 | enum target_object object, const char *annex, | |
4ac248ca | 1262 | gdb_byte *readbuf, const gdb_byte *writebuf, |
9b409511 YQ |
1263 | ULONGEST offset, ULONGEST len, |
1264 | ULONGEST *xfered_len) | |
27394598 | 1265 | { |
9b409511 | 1266 | enum target_xfer_status retval; |
27394598 AC |
1267 | |
1268 | gdb_assert (ops->to_xfer_partial != NULL); | |
cf7a04e8 | 1269 | |
ce6d0892 YQ |
1270 | /* Transfer is done when LEN is zero. */ |
1271 | if (len == 0) | |
9b409511 | 1272 | return TARGET_XFER_EOF; |
ce6d0892 | 1273 | |
d914c394 SS |
1274 | if (writebuf && !may_write_memory) |
1275 | error (_("Writing to memory is not allowed (addr %s, len %s)"), | |
1276 | core_addr_to_string_nz (offset), plongest (len)); | |
1277 | ||
9b409511 YQ |
1278 | *xfered_len = 0; |
1279 | ||
cf7a04e8 DJ |
1280 | /* If this is a memory transfer, let the memory-specific code |
1281 | have a look at it instead. Memory transfers are more | |
1282 | complicated. */ | |
29453a14 YQ |
1283 | if (object == TARGET_OBJECT_MEMORY || object == TARGET_OBJECT_STACK_MEMORY |
1284 | || object == TARGET_OBJECT_CODE_MEMORY) | |
4e5d721f | 1285 | retval = memory_xfer_partial (ops, object, readbuf, |
9b409511 | 1286 | writebuf, offset, len, xfered_len); |
9f713294 | 1287 | else if (object == TARGET_OBJECT_RAW_MEMORY) |
cf7a04e8 | 1288 | { |
0fec99e8 PA |
1289 | /* Skip/avoid accessing the target if the memory region |
1290 | attributes block the access. Check this here instead of in | |
1291 | raw_memory_xfer_partial as otherwise we'd end up checking | |
1292 | this twice in the case of the memory_xfer_partial path is | |
1293 | taken; once before checking the dcache, and another in the | |
1294 | tail call to raw_memory_xfer_partial. */ | |
1295 | if (!memory_xfer_check_region (readbuf, writebuf, offset, len, &len, | |
1296 | NULL)) | |
1297 | return TARGET_XFER_E_IO; | |
1298 | ||
9f713294 | 1299 | /* Request the normal memory object from other layers. */ |
9b409511 YQ |
1300 | retval = raw_memory_xfer_partial (ops, readbuf, writebuf, offset, len, |
1301 | xfered_len); | |
cf7a04e8 | 1302 | } |
9f713294 YQ |
1303 | else |
1304 | retval = ops->to_xfer_partial (ops, object, annex, readbuf, | |
9b409511 | 1305 | writebuf, offset, len, xfered_len); |
cf7a04e8 | 1306 | |
27394598 AC |
1307 | if (targetdebug) |
1308 | { | |
1309 | const unsigned char *myaddr = NULL; | |
1310 | ||
1311 | fprintf_unfiltered (gdb_stdlog, | |
3e43a32a | 1312 | "%s:target_xfer_partial " |
9b409511 | 1313 | "(%d, %s, %s, %s, %s, %s) = %d, %s", |
27394598 AC |
1314 | ops->to_shortname, |
1315 | (int) object, | |
1316 | (annex ? annex : "(null)"), | |
53b71562 JB |
1317 | host_address_to_string (readbuf), |
1318 | host_address_to_string (writebuf), | |
0b1553bc | 1319 | core_addr_to_string_nz (offset), |
9b409511 YQ |
1320 | pulongest (len), retval, |
1321 | pulongest (*xfered_len)); | |
27394598 AC |
1322 | |
1323 | if (readbuf) | |
1324 | myaddr = readbuf; | |
1325 | if (writebuf) | |
1326 | myaddr = writebuf; | |
9b409511 | 1327 | if (retval == TARGET_XFER_OK && myaddr != NULL) |
27394598 AC |
1328 | { |
1329 | int i; | |
2bc416ba | 1330 | |
27394598 | 1331 | fputs_unfiltered (", bytes =", gdb_stdlog); |
9b409511 | 1332 | for (i = 0; i < *xfered_len; i++) |
27394598 | 1333 | { |
53b71562 | 1334 | if ((((intptr_t) &(myaddr[i])) & 0xf) == 0) |
27394598 AC |
1335 | { |
1336 | if (targetdebug < 2 && i > 0) | |
1337 | { | |
1338 | fprintf_unfiltered (gdb_stdlog, " ..."); | |
1339 | break; | |
1340 | } | |
1341 | fprintf_unfiltered (gdb_stdlog, "\n"); | |
1342 | } | |
2bc416ba | 1343 | |
27394598 AC |
1344 | fprintf_unfiltered (gdb_stdlog, " %02x", myaddr[i] & 0xff); |
1345 | } | |
1346 | } | |
2bc416ba | 1347 | |
27394598 AC |
1348 | fputc_unfiltered ('\n', gdb_stdlog); |
1349 | } | |
9b409511 YQ |
1350 | |
1351 | /* Check implementations of to_xfer_partial update *XFERED_LEN | |
1352 | properly. Do assertion after printing debug messages, so that we | |
1353 | can find more clues on assertion failure from debugging messages. */ | |
bc113b4e | 1354 | if (retval == TARGET_XFER_OK || retval == TARGET_XFER_UNAVAILABLE) |
9b409511 YQ |
1355 | gdb_assert (*xfered_len > 0); |
1356 | ||
27394598 AC |
1357 | return retval; |
1358 | } | |
1359 | ||
578d3588 PA |
1360 | /* Read LEN bytes of target memory at address MEMADDR, placing the |
1361 | results in GDB's memory at MYADDR. Returns either 0 for success or | |
d09f2c3f | 1362 | -1 if any error occurs. |
c906108c SS |
1363 | |
1364 | If an error occurs, no guarantee is made about the contents of the data at | |
1365 | MYADDR. In particular, the caller should not depend upon partial reads | |
1366 | filling the buffer with good data. There is no way for the caller to know | |
1367 | how much good data might have been transfered anyway. Callers that can | |
cf7a04e8 | 1368 | deal with partial reads should call target_read (which will retry until |
c378eb4e | 1369 | it makes no progress, and then return how much was transferred). */ |
c906108c SS |
1370 | |
1371 | int | |
1b162304 | 1372 | target_read_memory (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len) |
c906108c | 1373 | { |
c35b1492 PA |
1374 | /* Dispatch to the topmost target, not the flattened current_target. |
1375 | Memory accesses check target->to_has_(all_)memory, and the | |
1376 | flattened target doesn't inherit those. */ | |
1377 | if (target_read (current_target.beneath, TARGET_OBJECT_MEMORY, NULL, | |
cf7a04e8 DJ |
1378 | myaddr, memaddr, len) == len) |
1379 | return 0; | |
0779438d | 1380 | else |
d09f2c3f | 1381 | return -1; |
c906108c SS |
1382 | } |
1383 | ||
721ec300 GB |
1384 | /* See target/target.h. */ |
1385 | ||
1386 | int | |
1387 | target_read_uint32 (CORE_ADDR memaddr, uint32_t *result) | |
1388 | { | |
1389 | gdb_byte buf[4]; | |
1390 | int r; | |
1391 | ||
1392 | r = target_read_memory (memaddr, buf, sizeof buf); | |
1393 | if (r != 0) | |
1394 | return r; | |
1395 | *result = extract_unsigned_integer (buf, sizeof buf, | |
1396 | gdbarch_byte_order (target_gdbarch ())); | |
1397 | return 0; | |
1398 | } | |
1399 | ||
aee4bf85 PA |
1400 | /* Like target_read_memory, but specify explicitly that this is a read |
1401 | from the target's raw memory. That is, this read bypasses the | |
1402 | dcache, breakpoint shadowing, etc. */ | |
1403 | ||
1404 | int | |
1405 | target_read_raw_memory (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len) | |
1406 | { | |
1407 | /* See comment in target_read_memory about why the request starts at | |
1408 | current_target.beneath. */ | |
1409 | if (target_read (current_target.beneath, TARGET_OBJECT_RAW_MEMORY, NULL, | |
1410 | myaddr, memaddr, len) == len) | |
1411 | return 0; | |
1412 | else | |
d09f2c3f | 1413 | return -1; |
aee4bf85 PA |
1414 | } |
1415 | ||
4e5d721f DE |
1416 | /* Like target_read_memory, but specify explicitly that this is a read from |
1417 | the target's stack. This may trigger different cache behavior. */ | |
1418 | ||
1419 | int | |
45aa4659 | 1420 | target_read_stack (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len) |
4e5d721f | 1421 | { |
aee4bf85 PA |
1422 | /* See comment in target_read_memory about why the request starts at |
1423 | current_target.beneath. */ | |
4e5d721f DE |
1424 | if (target_read (current_target.beneath, TARGET_OBJECT_STACK_MEMORY, NULL, |
1425 | myaddr, memaddr, len) == len) | |
1426 | return 0; | |
1427 | else | |
d09f2c3f | 1428 | return -1; |
4e5d721f DE |
1429 | } |
1430 | ||
29453a14 YQ |
1431 | /* Like target_read_memory, but specify explicitly that this is a read from |
1432 | the target's code. This may trigger different cache behavior. */ | |
1433 | ||
1434 | int | |
1435 | target_read_code (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len) | |
1436 | { | |
aee4bf85 PA |
1437 | /* See comment in target_read_memory about why the request starts at |
1438 | current_target.beneath. */ | |
29453a14 YQ |
1439 | if (target_read (current_target.beneath, TARGET_OBJECT_CODE_MEMORY, NULL, |
1440 | myaddr, memaddr, len) == len) | |
1441 | return 0; | |
1442 | else | |
d09f2c3f | 1443 | return -1; |
29453a14 YQ |
1444 | } |
1445 | ||
7f79c47e | 1446 | /* Write LEN bytes from MYADDR to target memory at address MEMADDR. |
d09f2c3f PA |
1447 | Returns either 0 for success or -1 if any error occurs. If an |
1448 | error occurs, no guarantee is made about how much data got written. | |
1449 | Callers that can deal with partial writes should call | |
1450 | target_write. */ | |
7f79c47e | 1451 | |
c906108c | 1452 | int |
45aa4659 | 1453 | target_write_memory (CORE_ADDR memaddr, const gdb_byte *myaddr, ssize_t len) |
c906108c | 1454 | { |
aee4bf85 PA |
1455 | /* See comment in target_read_memory about why the request starts at |
1456 | current_target.beneath. */ | |
c35b1492 | 1457 | if (target_write (current_target.beneath, TARGET_OBJECT_MEMORY, NULL, |
cf7a04e8 DJ |
1458 | myaddr, memaddr, len) == len) |
1459 | return 0; | |
0779438d | 1460 | else |
d09f2c3f | 1461 | return -1; |
c906108c | 1462 | } |
c5aa993b | 1463 | |
f0ba3972 | 1464 | /* Write LEN bytes from MYADDR to target raw memory at address |
d09f2c3f PA |
1465 | MEMADDR. Returns either 0 for success or -1 if any error occurs. |
1466 | If an error occurs, no guarantee is made about how much data got | |
1467 | written. Callers that can deal with partial writes should call | |
1468 | target_write. */ | |
f0ba3972 PA |
1469 | |
1470 | int | |
45aa4659 | 1471 | target_write_raw_memory (CORE_ADDR memaddr, const gdb_byte *myaddr, ssize_t len) |
f0ba3972 | 1472 | { |
aee4bf85 PA |
1473 | /* See comment in target_read_memory about why the request starts at |
1474 | current_target.beneath. */ | |
f0ba3972 PA |
1475 | if (target_write (current_target.beneath, TARGET_OBJECT_RAW_MEMORY, NULL, |
1476 | myaddr, memaddr, len) == len) | |
1477 | return 0; | |
1478 | else | |
d09f2c3f | 1479 | return -1; |
f0ba3972 PA |
1480 | } |
1481 | ||
fd79ecee DJ |
1482 | /* Fetch the target's memory map. */ |
1483 | ||
1484 | VEC(mem_region_s) * | |
1485 | target_memory_map (void) | |
1486 | { | |
1487 | VEC(mem_region_s) *result; | |
1488 | struct mem_region *last_one, *this_one; | |
1489 | int ix; | |
6b2c5a57 | 1490 | result = current_target.to_memory_map (¤t_target); |
fd79ecee DJ |
1491 | if (result == NULL) |
1492 | return NULL; | |
1493 | ||
1494 | qsort (VEC_address (mem_region_s, result), | |
1495 | VEC_length (mem_region_s, result), | |
1496 | sizeof (struct mem_region), mem_region_cmp); | |
1497 | ||
1498 | /* Check that regions do not overlap. Simultaneously assign | |
1499 | a numbering for the "mem" commands to use to refer to | |
1500 | each region. */ | |
1501 | last_one = NULL; | |
1502 | for (ix = 0; VEC_iterate (mem_region_s, result, ix, this_one); ix++) | |
1503 | { | |
1504 | this_one->number = ix; | |
1505 | ||
1506 | if (last_one && last_one->hi > this_one->lo) | |
1507 | { | |
1508 | warning (_("Overlapping regions in memory map: ignoring")); | |
1509 | VEC_free (mem_region_s, result); | |
1510 | return NULL; | |
1511 | } | |
1512 | last_one = this_one; | |
1513 | } | |
1514 | ||
1515 | return result; | |
1516 | } | |
1517 | ||
a76d924d DJ |
1518 | void |
1519 | target_flash_erase (ULONGEST address, LONGEST length) | |
1520 | { | |
e8a6c6ac | 1521 | current_target.to_flash_erase (¤t_target, address, length); |
a76d924d DJ |
1522 | } |
1523 | ||
1524 | void | |
1525 | target_flash_done (void) | |
1526 | { | |
f6fb2925 | 1527 | current_target.to_flash_done (¤t_target); |
a76d924d DJ |
1528 | } |
1529 | ||
920d2a44 AC |
1530 | static void |
1531 | show_trust_readonly (struct ui_file *file, int from_tty, | |
1532 | struct cmd_list_element *c, const char *value) | |
1533 | { | |
3e43a32a MS |
1534 | fprintf_filtered (file, |
1535 | _("Mode for reading from readonly sections is %s.\n"), | |
920d2a44 AC |
1536 | value); |
1537 | } | |
3a11626d | 1538 | |
7f79c47e | 1539 | /* Target vector read/write partial wrapper functions. */ |
0088c768 | 1540 | |
9b409511 | 1541 | static enum target_xfer_status |
1e3ff5ad AC |
1542 | target_read_partial (struct target_ops *ops, |
1543 | enum target_object object, | |
1b0ba102 | 1544 | const char *annex, gdb_byte *buf, |
9b409511 YQ |
1545 | ULONGEST offset, ULONGEST len, |
1546 | ULONGEST *xfered_len) | |
1e3ff5ad | 1547 | { |
9b409511 YQ |
1548 | return target_xfer_partial (ops, object, annex, buf, NULL, offset, len, |
1549 | xfered_len); | |
1e3ff5ad AC |
1550 | } |
1551 | ||
8a55ffb0 | 1552 | static enum target_xfer_status |
1e3ff5ad AC |
1553 | target_write_partial (struct target_ops *ops, |
1554 | enum target_object object, | |
1b0ba102 | 1555 | const char *annex, const gdb_byte *buf, |
9b409511 | 1556 | ULONGEST offset, LONGEST len, ULONGEST *xfered_len) |
1e3ff5ad | 1557 | { |
9b409511 YQ |
1558 | return target_xfer_partial (ops, object, annex, NULL, buf, offset, len, |
1559 | xfered_len); | |
1e3ff5ad AC |
1560 | } |
1561 | ||
1562 | /* Wrappers to perform the full transfer. */ | |
7f79c47e DE |
1563 | |
1564 | /* For docs on target_read see target.h. */ | |
1565 | ||
1e3ff5ad AC |
1566 | LONGEST |
1567 | target_read (struct target_ops *ops, | |
1568 | enum target_object object, | |
1b0ba102 | 1569 | const char *annex, gdb_byte *buf, |
1e3ff5ad AC |
1570 | ULONGEST offset, LONGEST len) |
1571 | { | |
279a6fed | 1572 | LONGEST xfered_total = 0; |
d309493c SM |
1573 | int unit_size = 1; |
1574 | ||
1575 | /* If we are reading from a memory object, find the length of an addressable | |
1576 | unit for that architecture. */ | |
1577 | if (object == TARGET_OBJECT_MEMORY | |
1578 | || object == TARGET_OBJECT_STACK_MEMORY | |
1579 | || object == TARGET_OBJECT_CODE_MEMORY | |
1580 | || object == TARGET_OBJECT_RAW_MEMORY) | |
1581 | unit_size = gdbarch_addressable_memory_unit_size (target_gdbarch ()); | |
5d502164 | 1582 | |
279a6fed | 1583 | while (xfered_total < len) |
1e3ff5ad | 1584 | { |
279a6fed | 1585 | ULONGEST xfered_partial; |
9b409511 YQ |
1586 | enum target_xfer_status status; |
1587 | ||
1588 | status = target_read_partial (ops, object, annex, | |
d309493c | 1589 | buf + xfered_total * unit_size, |
279a6fed SM |
1590 | offset + xfered_total, len - xfered_total, |
1591 | &xfered_partial); | |
5d502164 | 1592 | |
1e3ff5ad | 1593 | /* Call an observer, notifying them of the xfer progress? */ |
9b409511 | 1594 | if (status == TARGET_XFER_EOF) |
279a6fed | 1595 | return xfered_total; |
9b409511 YQ |
1596 | else if (status == TARGET_XFER_OK) |
1597 | { | |
279a6fed | 1598 | xfered_total += xfered_partial; |
9b409511 YQ |
1599 | QUIT; |
1600 | } | |
1601 | else | |
279a6fed | 1602 | return TARGET_XFER_E_IO; |
9b409511 | 1603 | |
1e3ff5ad AC |
1604 | } |
1605 | return len; | |
1606 | } | |
1607 | ||
f1a507a1 JB |
1608 | /* Assuming that the entire [begin, end) range of memory cannot be |
1609 | read, try to read whatever subrange is possible to read. | |
1610 | ||
1611 | The function returns, in RESULT, either zero or one memory block. | |
1612 | If there's a readable subrange at the beginning, it is completely | |
1613 | read and returned. Any further readable subrange will not be read. | |
1614 | Otherwise, if there's a readable subrange at the end, it will be | |
1615 | completely read and returned. Any readable subranges before it | |
1616 | (obviously, not starting at the beginning), will be ignored. In | |
1617 | other cases -- either no readable subrange, or readable subrange(s) | |
1618 | that is neither at the beginning, or end, nothing is returned. | |
1619 | ||
1620 | The purpose of this function is to handle a read across a boundary | |
1621 | of accessible memory in a case when memory map is not available. | |
1622 | The above restrictions are fine for this case, but will give | |
1623 | incorrect results if the memory is 'patchy'. However, supporting | |
1624 | 'patchy' memory would require trying to read every single byte, | |
1625 | and it seems unacceptable solution. Explicit memory map is | |
1626 | recommended for this case -- and target_read_memory_robust will | |
1627 | take care of reading multiple ranges then. */ | |
8dedea02 VP |
1628 | |
1629 | static void | |
3e43a32a | 1630 | read_whatever_is_readable (struct target_ops *ops, |
279a6fed | 1631 | const ULONGEST begin, const ULONGEST end, |
d309493c | 1632 | int unit_size, |
386c8614 | 1633 | std::vector<memory_read_result> *result) |
d5086790 | 1634 | { |
8dedea02 VP |
1635 | ULONGEST current_begin = begin; |
1636 | ULONGEST current_end = end; | |
1637 | int forward; | |
9b409511 | 1638 | ULONGEST xfered_len; |
8dedea02 VP |
1639 | |
1640 | /* If we previously failed to read 1 byte, nothing can be done here. */ | |
1641 | if (end - begin <= 1) | |
386c8614 TT |
1642 | return; |
1643 | ||
1644 | gdb::unique_xmalloc_ptr<gdb_byte> buf ((gdb_byte *) xmalloc (end - begin)); | |
8dedea02 VP |
1645 | |
1646 | /* Check that either first or the last byte is readable, and give up | |
c378eb4e | 1647 | if not. This heuristic is meant to permit reading accessible memory |
8dedea02 VP |
1648 | at the boundary of accessible region. */ |
1649 | if (target_read_partial (ops, TARGET_OBJECT_MEMORY, NULL, | |
386c8614 | 1650 | buf.get (), begin, 1, &xfered_len) == TARGET_XFER_OK) |
8dedea02 VP |
1651 | { |
1652 | forward = 1; | |
1653 | ++current_begin; | |
1654 | } | |
1655 | else if (target_read_partial (ops, TARGET_OBJECT_MEMORY, NULL, | |
386c8614 | 1656 | buf.get () + (end - begin) - 1, end - 1, 1, |
9b409511 | 1657 | &xfered_len) == TARGET_XFER_OK) |
8dedea02 VP |
1658 | { |
1659 | forward = 0; | |
1660 | --current_end; | |
1661 | } | |
1662 | else | |
386c8614 | 1663 | return; |
8dedea02 VP |
1664 | |
1665 | /* Loop invariant is that the [current_begin, current_end) was previously | |
1666 | found to be not readable as a whole. | |
1667 | ||
1668 | Note loop condition -- if the range has 1 byte, we can't divide the range | |
1669 | so there's no point trying further. */ | |
1670 | while (current_end - current_begin > 1) | |
1671 | { | |
1672 | ULONGEST first_half_begin, first_half_end; | |
1673 | ULONGEST second_half_begin, second_half_end; | |
1674 | LONGEST xfer; | |
279a6fed | 1675 | ULONGEST middle = current_begin + (current_end - current_begin) / 2; |
f1a507a1 | 1676 | |
8dedea02 VP |
1677 | if (forward) |
1678 | { | |
1679 | first_half_begin = current_begin; | |
1680 | first_half_end = middle; | |
1681 | second_half_begin = middle; | |
1682 | second_half_end = current_end; | |
1683 | } | |
1684 | else | |
1685 | { | |
1686 | first_half_begin = middle; | |
1687 | first_half_end = current_end; | |
1688 | second_half_begin = current_begin; | |
1689 | second_half_end = middle; | |
1690 | } | |
1691 | ||
1692 | xfer = target_read (ops, TARGET_OBJECT_MEMORY, NULL, | |
386c8614 | 1693 | buf.get () + (first_half_begin - begin) * unit_size, |
8dedea02 VP |
1694 | first_half_begin, |
1695 | first_half_end - first_half_begin); | |
1696 | ||
1697 | if (xfer == first_half_end - first_half_begin) | |
1698 | { | |
c378eb4e | 1699 | /* This half reads up fine. So, the error must be in the |
3e43a32a | 1700 | other half. */ |
8dedea02 VP |
1701 | current_begin = second_half_begin; |
1702 | current_end = second_half_end; | |
1703 | } | |
1704 | else | |
1705 | { | |
c378eb4e | 1706 | /* This half is not readable. Because we've tried one byte, we |
279a6fed | 1707 | know some part of this half if actually readable. Go to the next |
8dedea02 VP |
1708 | iteration to divide again and try to read. |
1709 | ||
1710 | We don't handle the other half, because this function only tries | |
1711 | to read a single readable subrange. */ | |
1712 | current_begin = first_half_begin; | |
1713 | current_end = first_half_end; | |
1714 | } | |
1715 | } | |
1716 | ||
1717 | if (forward) | |
1718 | { | |
1719 | /* The [begin, current_begin) range has been read. */ | |
386c8614 | 1720 | result->emplace_back (begin, current_end, std::move (buf)); |
8dedea02 VP |
1721 | } |
1722 | else | |
1723 | { | |
1724 | /* The [current_end, end) range has been read. */ | |
279a6fed | 1725 | LONGEST region_len = end - current_end; |
f1a507a1 | 1726 | |
386c8614 TT |
1727 | gdb::unique_xmalloc_ptr<gdb_byte> data |
1728 | ((gdb_byte *) xmalloc (region_len * unit_size)); | |
1729 | memcpy (data.get (), buf.get () + (current_end - begin) * unit_size, | |
d309493c | 1730 | region_len * unit_size); |
386c8614 | 1731 | result->emplace_back (current_end, end, std::move (data)); |
8dedea02 | 1732 | } |
8dedea02 VP |
1733 | } |
1734 | ||
386c8614 | 1735 | std::vector<memory_read_result> |
279a6fed SM |
1736 | read_memory_robust (struct target_ops *ops, |
1737 | const ULONGEST offset, const LONGEST len) | |
8dedea02 | 1738 | { |
386c8614 | 1739 | std::vector<memory_read_result> result; |
d309493c | 1740 | int unit_size = gdbarch_addressable_memory_unit_size (target_gdbarch ()); |
8dedea02 | 1741 | |
279a6fed SM |
1742 | LONGEST xfered_total = 0; |
1743 | while (xfered_total < len) | |
d5086790 | 1744 | { |
279a6fed SM |
1745 | struct mem_region *region = lookup_mem_region (offset + xfered_total); |
1746 | LONGEST region_len; | |
5d502164 | 1747 | |
8dedea02 VP |
1748 | /* If there is no explicit region, a fake one should be created. */ |
1749 | gdb_assert (region); | |
1750 | ||
1751 | if (region->hi == 0) | |
279a6fed | 1752 | region_len = len - xfered_total; |
8dedea02 | 1753 | else |
279a6fed | 1754 | region_len = region->hi - offset; |
8dedea02 VP |
1755 | |
1756 | if (region->attrib.mode == MEM_NONE || region->attrib.mode == MEM_WO) | |
d5086790 | 1757 | { |
c378eb4e | 1758 | /* Cannot read this region. Note that we can end up here only |
8dedea02 VP |
1759 | if the region is explicitly marked inaccessible, or |
1760 | 'inaccessible-by-default' is in effect. */ | |
279a6fed | 1761 | xfered_total += region_len; |
8dedea02 VP |
1762 | } |
1763 | else | |
1764 | { | |
325fac50 | 1765 | LONGEST to_read = std::min (len - xfered_total, region_len); |
386c8614 TT |
1766 | gdb::unique_xmalloc_ptr<gdb_byte> buffer |
1767 | ((gdb_byte *) xmalloc (to_read * unit_size)); | |
8dedea02 | 1768 | |
279a6fed | 1769 | LONGEST xfered_partial = |
386c8614 | 1770 | target_read (ops, TARGET_OBJECT_MEMORY, NULL, buffer.get (), |
279a6fed | 1771 | offset + xfered_total, to_read); |
8dedea02 | 1772 | /* Call an observer, notifying them of the xfer progress? */ |
279a6fed | 1773 | if (xfered_partial <= 0) |
d5086790 | 1774 | { |
c378eb4e | 1775 | /* Got an error reading full chunk. See if maybe we can read |
8dedea02 | 1776 | some subrange. */ |
e084c964 DB |
1777 | read_whatever_is_readable (ops, offset + xfered_total, |
1778 | offset + xfered_total + to_read, | |
1779 | unit_size, &result); | |
279a6fed | 1780 | xfered_total += to_read; |
d5086790 | 1781 | } |
8dedea02 VP |
1782 | else |
1783 | { | |
386c8614 TT |
1784 | result.emplace_back (offset + xfered_total, |
1785 | offset + xfered_total + xfered_partial, | |
1786 | std::move (buffer)); | |
279a6fed | 1787 | xfered_total += xfered_partial; |
8dedea02 VP |
1788 | } |
1789 | QUIT; | |
d5086790 | 1790 | } |
d5086790 | 1791 | } |
9d78f827 | 1792 | |
8dedea02 | 1793 | return result; |
d5086790 VP |
1794 | } |
1795 | ||
8dedea02 | 1796 | |
cf7a04e8 DJ |
1797 | /* An alternative to target_write with progress callbacks. */ |
1798 | ||
1e3ff5ad | 1799 | LONGEST |
cf7a04e8 DJ |
1800 | target_write_with_progress (struct target_ops *ops, |
1801 | enum target_object object, | |
1802 | const char *annex, const gdb_byte *buf, | |
1803 | ULONGEST offset, LONGEST len, | |
1804 | void (*progress) (ULONGEST, void *), void *baton) | |
1e3ff5ad | 1805 | { |
279a6fed | 1806 | LONGEST xfered_total = 0; |
d309493c SM |
1807 | int unit_size = 1; |
1808 | ||
1809 | /* If we are writing to a memory object, find the length of an addressable | |
1810 | unit for that architecture. */ | |
1811 | if (object == TARGET_OBJECT_MEMORY | |
1812 | || object == TARGET_OBJECT_STACK_MEMORY | |
1813 | || object == TARGET_OBJECT_CODE_MEMORY | |
1814 | || object == TARGET_OBJECT_RAW_MEMORY) | |
1815 | unit_size = gdbarch_addressable_memory_unit_size (target_gdbarch ()); | |
a76d924d DJ |
1816 | |
1817 | /* Give the progress callback a chance to set up. */ | |
1818 | if (progress) | |
1819 | (*progress) (0, baton); | |
1820 | ||
279a6fed | 1821 | while (xfered_total < len) |
1e3ff5ad | 1822 | { |
279a6fed | 1823 | ULONGEST xfered_partial; |
9b409511 YQ |
1824 | enum target_xfer_status status; |
1825 | ||
1826 | status = target_write_partial (ops, object, annex, | |
d309493c | 1827 | buf + xfered_total * unit_size, |
279a6fed SM |
1828 | offset + xfered_total, len - xfered_total, |
1829 | &xfered_partial); | |
cf7a04e8 | 1830 | |
5c328c05 | 1831 | if (status != TARGET_XFER_OK) |
279a6fed | 1832 | return status == TARGET_XFER_EOF ? xfered_total : TARGET_XFER_E_IO; |
cf7a04e8 DJ |
1833 | |
1834 | if (progress) | |
279a6fed | 1835 | (*progress) (xfered_partial, baton); |
cf7a04e8 | 1836 | |
279a6fed | 1837 | xfered_total += xfered_partial; |
1e3ff5ad AC |
1838 | QUIT; |
1839 | } | |
1840 | return len; | |
1841 | } | |
1842 | ||
7f79c47e DE |
1843 | /* For docs on target_write see target.h. */ |
1844 | ||
cf7a04e8 DJ |
1845 | LONGEST |
1846 | target_write (struct target_ops *ops, | |
1847 | enum target_object object, | |
1848 | const char *annex, const gdb_byte *buf, | |
1849 | ULONGEST offset, LONGEST len) | |
1850 | { | |
1851 | return target_write_with_progress (ops, object, annex, buf, offset, len, | |
1852 | NULL, NULL); | |
1853 | } | |
1854 | ||
159f81f3 DJ |
1855 | /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return |
1856 | the size of the transferred data. PADDING additional bytes are | |
1857 | available in *BUF_P. This is a helper function for | |
1858 | target_read_alloc; see the declaration of that function for more | |
1859 | information. */ | |
13547ab6 | 1860 | |
159f81f3 DJ |
1861 | static LONGEST |
1862 | target_read_alloc_1 (struct target_ops *ops, enum target_object object, | |
1863 | const char *annex, gdb_byte **buf_p, int padding) | |
13547ab6 DJ |
1864 | { |
1865 | size_t buf_alloc, buf_pos; | |
1866 | gdb_byte *buf; | |
13547ab6 DJ |
1867 | |
1868 | /* This function does not have a length parameter; it reads the | |
1869 | entire OBJECT). Also, it doesn't support objects fetched partly | |
1870 | from one target and partly from another (in a different stratum, | |
1871 | e.g. a core file and an executable). Both reasons make it | |
1872 | unsuitable for reading memory. */ | |
1873 | gdb_assert (object != TARGET_OBJECT_MEMORY); | |
1874 | ||
1875 | /* Start by reading up to 4K at a time. The target will throttle | |
1876 | this number down if necessary. */ | |
1877 | buf_alloc = 4096; | |
224c3ddb | 1878 | buf = (gdb_byte *) xmalloc (buf_alloc); |
13547ab6 DJ |
1879 | buf_pos = 0; |
1880 | while (1) | |
1881 | { | |
9b409511 YQ |
1882 | ULONGEST xfered_len; |
1883 | enum target_xfer_status status; | |
1884 | ||
1885 | status = target_read_partial (ops, object, annex, &buf[buf_pos], | |
1886 | buf_pos, buf_alloc - buf_pos - padding, | |
1887 | &xfered_len); | |
1888 | ||
1889 | if (status == TARGET_XFER_EOF) | |
13547ab6 DJ |
1890 | { |
1891 | /* Read all there was. */ | |
1892 | if (buf_pos == 0) | |
1893 | xfree (buf); | |
1894 | else | |
1895 | *buf_p = buf; | |
1896 | return buf_pos; | |
1897 | } | |
9b409511 YQ |
1898 | else if (status != TARGET_XFER_OK) |
1899 | { | |
1900 | /* An error occurred. */ | |
1901 | xfree (buf); | |
1902 | return TARGET_XFER_E_IO; | |
1903 | } | |
13547ab6 | 1904 | |
9b409511 | 1905 | buf_pos += xfered_len; |
13547ab6 DJ |
1906 | |
1907 | /* If the buffer is filling up, expand it. */ | |
1908 | if (buf_alloc < buf_pos * 2) | |
1909 | { | |
1910 | buf_alloc *= 2; | |
224c3ddb | 1911 | buf = (gdb_byte *) xrealloc (buf, buf_alloc); |
13547ab6 DJ |
1912 | } |
1913 | ||
1914 | QUIT; | |
1915 | } | |
1916 | } | |
1917 | ||
159f81f3 DJ |
1918 | /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return |
1919 | the size of the transferred data. See the declaration in "target.h" | |
1920 | function for more information about the return value. */ | |
1921 | ||
1922 | LONGEST | |
1923 | target_read_alloc (struct target_ops *ops, enum target_object object, | |
1924 | const char *annex, gdb_byte **buf_p) | |
1925 | { | |
1926 | return target_read_alloc_1 (ops, object, annex, buf_p, 0); | |
1927 | } | |
1928 | ||
1929 | /* Read OBJECT/ANNEX using OPS. The result is NUL-terminated and | |
1930 | returned as a string, allocated using xmalloc. If an error occurs | |
1931 | or the transfer is unsupported, NULL is returned. Empty objects | |
1932 | are returned as allocated but empty strings. A warning is issued | |
1933 | if the result contains any embedded NUL bytes. */ | |
1934 | ||
1935 | char * | |
1936 | target_read_stralloc (struct target_ops *ops, enum target_object object, | |
1937 | const char *annex) | |
1938 | { | |
39086a0e PA |
1939 | gdb_byte *buffer; |
1940 | char *bufstr; | |
7313baad | 1941 | LONGEST i, transferred; |
159f81f3 | 1942 | |
39086a0e PA |
1943 | transferred = target_read_alloc_1 (ops, object, annex, &buffer, 1); |
1944 | bufstr = (char *) buffer; | |
159f81f3 DJ |
1945 | |
1946 | if (transferred < 0) | |
1947 | return NULL; | |
1948 | ||
1949 | if (transferred == 0) | |
1950 | return xstrdup (""); | |
1951 | ||
39086a0e | 1952 | bufstr[transferred] = 0; |
7313baad UW |
1953 | |
1954 | /* Check for embedded NUL bytes; but allow trailing NULs. */ | |
39086a0e PA |
1955 | for (i = strlen (bufstr); i < transferred; i++) |
1956 | if (bufstr[i] != 0) | |
7313baad UW |
1957 | { |
1958 | warning (_("target object %d, annex %s, " | |
1959 | "contained unexpected null characters"), | |
1960 | (int) object, annex ? annex : "(none)"); | |
1961 | break; | |
1962 | } | |
159f81f3 | 1963 | |
39086a0e | 1964 | return bufstr; |
159f81f3 DJ |
1965 | } |
1966 | ||
b6591e8b AC |
1967 | /* Memory transfer methods. */ |
1968 | ||
1969 | void | |
1b0ba102 | 1970 | get_target_memory (struct target_ops *ops, CORE_ADDR addr, gdb_byte *buf, |
b6591e8b AC |
1971 | LONGEST len) |
1972 | { | |
07b82ea5 PA |
1973 | /* This method is used to read from an alternate, non-current |
1974 | target. This read must bypass the overlay support (as symbols | |
1975 | don't match this target), and GDB's internal cache (wrong cache | |
1976 | for this target). */ | |
1977 | if (target_read (ops, TARGET_OBJECT_RAW_MEMORY, NULL, buf, addr, len) | |
b6591e8b | 1978 | != len) |
578d3588 | 1979 | memory_error (TARGET_XFER_E_IO, addr); |
b6591e8b AC |
1980 | } |
1981 | ||
1982 | ULONGEST | |
5d502164 MS |
1983 | get_target_memory_unsigned (struct target_ops *ops, CORE_ADDR addr, |
1984 | int len, enum bfd_endian byte_order) | |
b6591e8b | 1985 | { |
f6519ebc | 1986 | gdb_byte buf[sizeof (ULONGEST)]; |
b6591e8b AC |
1987 | |
1988 | gdb_assert (len <= sizeof (buf)); | |
1989 | get_target_memory (ops, addr, buf, len); | |
e17a4113 | 1990 | return extract_unsigned_integer (buf, len, byte_order); |
b6591e8b AC |
1991 | } |
1992 | ||
3db08215 MM |
1993 | /* See target.h. */ |
1994 | ||
d914c394 SS |
1995 | int |
1996 | target_insert_breakpoint (struct gdbarch *gdbarch, | |
1997 | struct bp_target_info *bp_tgt) | |
1998 | { | |
1999 | if (!may_insert_breakpoints) | |
2000 | { | |
2001 | warning (_("May not insert breakpoints")); | |
2002 | return 1; | |
2003 | } | |
2004 | ||
6b84065d TT |
2005 | return current_target.to_insert_breakpoint (¤t_target, |
2006 | gdbarch, bp_tgt); | |
d914c394 SS |
2007 | } |
2008 | ||
3db08215 MM |
2009 | /* See target.h. */ |
2010 | ||
d914c394 | 2011 | int |
6b84065d | 2012 | target_remove_breakpoint (struct gdbarch *gdbarch, |
73971819 PA |
2013 | struct bp_target_info *bp_tgt, |
2014 | enum remove_bp_reason reason) | |
d914c394 SS |
2015 | { |
2016 | /* This is kind of a weird case to handle, but the permission might | |
2017 | have been changed after breakpoints were inserted - in which case | |
2018 | we should just take the user literally and assume that any | |
2019 | breakpoints should be left in place. */ | |
2020 | if (!may_insert_breakpoints) | |
2021 | { | |
2022 | warning (_("May not remove breakpoints")); | |
2023 | return 1; | |
2024 | } | |
2025 | ||
6b84065d | 2026 | return current_target.to_remove_breakpoint (¤t_target, |
73971819 | 2027 | gdbarch, bp_tgt, reason); |
d914c394 SS |
2028 | } |
2029 | ||
c906108c | 2030 | static void |
11db9430 | 2031 | info_target_command (char *args, int from_tty) |
c906108c SS |
2032 | { |
2033 | struct target_ops *t; | |
c906108c | 2034 | int has_all_mem = 0; |
c5aa993b | 2035 | |
c906108c | 2036 | if (symfile_objfile != NULL) |
4262abfb JK |
2037 | printf_unfiltered (_("Symbols from \"%s\".\n"), |
2038 | objfile_name (symfile_objfile)); | |
c906108c | 2039 | |
258b763a | 2040 | for (t = target_stack; t != NULL; t = t->beneath) |
c906108c | 2041 | { |
c35b1492 | 2042 | if (!(*t->to_has_memory) (t)) |
c906108c SS |
2043 | continue; |
2044 | ||
c5aa993b | 2045 | if ((int) (t->to_stratum) <= (int) dummy_stratum) |
c906108c SS |
2046 | continue; |
2047 | if (has_all_mem) | |
3e43a32a MS |
2048 | printf_unfiltered (_("\tWhile running this, " |
2049 | "GDB does not access memory from...\n")); | |
c5aa993b JM |
2050 | printf_unfiltered ("%s:\n", t->to_longname); |
2051 | (t->to_files_info) (t); | |
c35b1492 | 2052 | has_all_mem = (*t->to_has_all_memory) (t); |
c906108c SS |
2053 | } |
2054 | } | |
2055 | ||
fd79ecee DJ |
2056 | /* This function is called before any new inferior is created, e.g. |
2057 | by running a program, attaching, or connecting to a target. | |
2058 | It cleans up any state from previous invocations which might | |
2059 | change between runs. This is a subset of what target_preopen | |
2060 | resets (things which might change between targets). */ | |
2061 | ||
2062 | void | |
2063 | target_pre_inferior (int from_tty) | |
2064 | { | |
c378eb4e | 2065 | /* Clear out solib state. Otherwise the solib state of the previous |
b9db4ced | 2066 | inferior might have survived and is entirely wrong for the new |
c378eb4e | 2067 | target. This has been observed on GNU/Linux using glibc 2.3. How |
b9db4ced UW |
2068 | to reproduce: |
2069 | ||
2070 | bash$ ./foo& | |
2071 | [1] 4711 | |
2072 | bash$ ./foo& | |
2073 | [1] 4712 | |
2074 | bash$ gdb ./foo | |
2075 | [...] | |
2076 | (gdb) attach 4711 | |
2077 | (gdb) detach | |
2078 | (gdb) attach 4712 | |
2079 | Cannot access memory at address 0xdeadbeef | |
2080 | */ | |
b9db4ced | 2081 | |
50c71eaf PA |
2082 | /* In some OSs, the shared library list is the same/global/shared |
2083 | across inferiors. If code is shared between processes, so are | |
2084 | memory regions and features. */ | |
f5656ead | 2085 | if (!gdbarch_has_global_solist (target_gdbarch ())) |
50c71eaf PA |
2086 | { |
2087 | no_shared_libraries (NULL, from_tty); | |
2088 | ||
2089 | invalidate_target_mem_regions (); | |
424163ea | 2090 | |
50c71eaf PA |
2091 | target_clear_description (); |
2092 | } | |
8ffcbaaf | 2093 | |
e9756d52 PP |
2094 | /* attach_flag may be set if the previous process associated with |
2095 | the inferior was attached to. */ | |
2096 | current_inferior ()->attach_flag = 0; | |
2097 | ||
5d5658a1 PA |
2098 | current_inferior ()->highest_thread_num = 0; |
2099 | ||
8ffcbaaf | 2100 | agent_capability_invalidate (); |
fd79ecee DJ |
2101 | } |
2102 | ||
b8fa0bfa PA |
2103 | /* Callback for iterate_over_inferiors. Gets rid of the given |
2104 | inferior. */ | |
2105 | ||
2106 | static int | |
2107 | dispose_inferior (struct inferior *inf, void *args) | |
2108 | { | |
2109 | struct thread_info *thread; | |
2110 | ||
2111 | thread = any_thread_of_process (inf->pid); | |
2112 | if (thread) | |
2113 | { | |
2114 | switch_to_thread (thread->ptid); | |
2115 | ||
2116 | /* Core inferiors actually should be detached, not killed. */ | |
2117 | if (target_has_execution) | |
2118 | target_kill (); | |
2119 | else | |
2120 | target_detach (NULL, 0); | |
2121 | } | |
2122 | ||
2123 | return 0; | |
2124 | } | |
2125 | ||
c906108c SS |
2126 | /* This is to be called by the open routine before it does |
2127 | anything. */ | |
2128 | ||
2129 | void | |
fba45db2 | 2130 | target_preopen (int from_tty) |
c906108c | 2131 | { |
c5aa993b | 2132 | dont_repeat (); |
c906108c | 2133 | |
b8fa0bfa | 2134 | if (have_inferiors ()) |
c5aa993b | 2135 | { |
adf40b2e | 2136 | if (!from_tty |
b8fa0bfa PA |
2137 | || !have_live_inferiors () |
2138 | || query (_("A program is being debugged already. Kill it? "))) | |
2139 | iterate_over_inferiors (dispose_inferior, NULL); | |
c906108c | 2140 | else |
8a3fe4f8 | 2141 | error (_("Program not killed.")); |
c906108c SS |
2142 | } |
2143 | ||
2144 | /* Calling target_kill may remove the target from the stack. But if | |
2145 | it doesn't (which seems like a win for UDI), remove it now. */ | |
87ab71f0 PA |
2146 | /* Leave the exec target, though. The user may be switching from a |
2147 | live process to a core of the same program. */ | |
460014f5 | 2148 | pop_all_targets_above (file_stratum); |
fd79ecee DJ |
2149 | |
2150 | target_pre_inferior (from_tty); | |
c906108c SS |
2151 | } |
2152 | ||
2153 | /* Detach a target after doing deferred register stores. */ | |
2154 | ||
2155 | void | |
52554a0e | 2156 | target_detach (const char *args, int from_tty) |
c906108c | 2157 | { |
f5656ead | 2158 | if (gdbarch_has_global_breakpoints (target_gdbarch ())) |
50c71eaf PA |
2159 | /* Don't remove global breakpoints here. They're removed on |
2160 | disconnection from the target. */ | |
2161 | ; | |
2162 | else | |
2163 | /* If we're in breakpoints-always-inserted mode, have to remove | |
2164 | them before detaching. */ | |
dfd4cc63 | 2165 | remove_breakpoints_pid (ptid_get_pid (inferior_ptid)); |
74960c60 | 2166 | |
24291992 PA |
2167 | prepare_for_detach (); |
2168 | ||
09da0d0a | 2169 | current_target.to_detach (¤t_target, args, from_tty); |
c906108c SS |
2170 | } |
2171 | ||
6ad8ae5c | 2172 | void |
fee354ee | 2173 | target_disconnect (const char *args, int from_tty) |
6ad8ae5c | 2174 | { |
50c71eaf PA |
2175 | /* If we're in breakpoints-always-inserted mode or if breakpoints |
2176 | are global across processes, we have to remove them before | |
2177 | disconnecting. */ | |
74960c60 VP |
2178 | remove_breakpoints (); |
2179 | ||
86a0854a | 2180 | current_target.to_disconnect (¤t_target, args, from_tty); |
6ad8ae5c DJ |
2181 | } |
2182 | ||
f2b9e3df SDJ |
2183 | /* See target/target.h. */ |
2184 | ||
117de6a9 | 2185 | ptid_t |
47608cb1 | 2186 | target_wait (ptid_t ptid, struct target_waitstatus *status, int options) |
117de6a9 | 2187 | { |
a7068b60 | 2188 | return (current_target.to_wait) (¤t_target, ptid, status, options); |
117de6a9 PA |
2189 | } |
2190 | ||
0b333c5e PA |
2191 | /* See target.h. */ |
2192 | ||
2193 | ptid_t | |
2194 | default_target_wait (struct target_ops *ops, | |
2195 | ptid_t ptid, struct target_waitstatus *status, | |
2196 | int options) | |
2197 | { | |
2198 | status->kind = TARGET_WAITKIND_IGNORE; | |
2199 | return minus_one_ptid; | |
2200 | } | |
2201 | ||
7a114964 | 2202 | const char * |
117de6a9 PA |
2203 | target_pid_to_str (ptid_t ptid) |
2204 | { | |
770234d3 | 2205 | return (*current_target.to_pid_to_str) (¤t_target, ptid); |
117de6a9 PA |
2206 | } |
2207 | ||
73ede765 | 2208 | const char * |
4694da01 TT |
2209 | target_thread_name (struct thread_info *info) |
2210 | { | |
825828fc | 2211 | return current_target.to_thread_name (¤t_target, info); |
4694da01 TT |
2212 | } |
2213 | ||
e04ee09e KB |
2214 | struct thread_info * |
2215 | target_thread_handle_to_thread_info (const gdb_byte *thread_handle, | |
2216 | int handle_len, | |
2217 | struct inferior *inf) | |
2218 | { | |
2219 | return current_target.to_thread_handle_to_thread_info | |
2220 | (¤t_target, thread_handle, handle_len, inf); | |
2221 | } | |
2222 | ||
e1ac3328 | 2223 | void |
2ea28649 | 2224 | target_resume (ptid_t ptid, int step, enum gdb_signal signal) |
e1ac3328 | 2225 | { |
4e5d721f | 2226 | target_dcache_invalidate (); |
28439f5e | 2227 | |
6b84065d | 2228 | current_target.to_resume (¤t_target, ptid, step, signal); |
28439f5e | 2229 | |
6b84065d | 2230 | registers_changed_ptid (ptid); |
251bde03 PA |
2231 | /* We only set the internal executing state here. The user/frontend |
2232 | running state is set at a higher level. */ | |
6b84065d | 2233 | set_executing (ptid, 1); |
6b84065d | 2234 | clear_inline_frame_state (ptid); |
e1ac3328 | 2235 | } |
2455069d | 2236 | |
85ad3aaf PA |
2237 | /* If true, target_commit_resume is a nop. */ |
2238 | static int defer_target_commit_resume; | |
2239 | ||
2240 | /* See target.h. */ | |
2241 | ||
2242 | void | |
2243 | target_commit_resume (void) | |
2244 | { | |
2245 | struct target_ops *t; | |
2246 | ||
2247 | if (defer_target_commit_resume) | |
2248 | return; | |
2249 | ||
2250 | current_target.to_commit_resume (¤t_target); | |
2251 | } | |
2252 | ||
2253 | /* See target.h. */ | |
2254 | ||
a9bc57b9 TT |
2255 | scoped_restore_tmpl<int> |
2256 | make_scoped_defer_target_commit_resume () | |
85ad3aaf | 2257 | { |
a9bc57b9 | 2258 | return make_scoped_restore (&defer_target_commit_resume, 1); |
85ad3aaf PA |
2259 | } |
2260 | ||
2455069d UW |
2261 | void |
2262 | target_pass_signals (int numsigs, unsigned char *pass_signals) | |
2263 | { | |
035cad7f | 2264 | (*current_target.to_pass_signals) (¤t_target, numsigs, pass_signals); |
2455069d UW |
2265 | } |
2266 | ||
9b224c5e PA |
2267 | void |
2268 | target_program_signals (int numsigs, unsigned char *program_signals) | |
2269 | { | |
7d4f8efa TT |
2270 | (*current_target.to_program_signals) (¤t_target, |
2271 | numsigs, program_signals); | |
9b224c5e PA |
2272 | } |
2273 | ||
098dba18 TT |
2274 | static int |
2275 | default_follow_fork (struct target_ops *self, int follow_child, | |
2276 | int detach_fork) | |
2277 | { | |
2278 | /* Some target returned a fork event, but did not know how to follow it. */ | |
2279 | internal_error (__FILE__, __LINE__, | |
2280 | _("could not find a target to follow fork")); | |
2281 | } | |
2282 | ||
ee057212 DJ |
2283 | /* Look through the list of possible targets for a target that can |
2284 | follow forks. */ | |
2285 | ||
2286 | int | |
07107ca6 | 2287 | target_follow_fork (int follow_child, int detach_fork) |
ee057212 | 2288 | { |
a7068b60 TT |
2289 | return current_target.to_follow_fork (¤t_target, |
2290 | follow_child, detach_fork); | |
ee057212 DJ |
2291 | } |
2292 | ||
94585166 DB |
2293 | /* Target wrapper for follow exec hook. */ |
2294 | ||
2295 | void | |
2296 | target_follow_exec (struct inferior *inf, char *execd_pathname) | |
2297 | { | |
2298 | current_target.to_follow_exec (¤t_target, inf, execd_pathname); | |
2299 | } | |
2300 | ||
8d657035 TT |
2301 | static void |
2302 | default_mourn_inferior (struct target_ops *self) | |
2303 | { | |
2304 | internal_error (__FILE__, __LINE__, | |
2305 | _("could not find a target to follow mourn inferior")); | |
2306 | } | |
2307 | ||
136d6dae | 2308 | void |
bc1e6c81 | 2309 | target_mourn_inferior (ptid_t ptid) |
136d6dae | 2310 | { |
bc1e6c81 | 2311 | gdb_assert (ptid_equal (ptid, inferior_ptid)); |
8d657035 | 2312 | current_target.to_mourn_inferior (¤t_target); |
136d6dae | 2313 | |
8d657035 TT |
2314 | /* We no longer need to keep handles on any of the object files. |
2315 | Make sure to release them to avoid unnecessarily locking any | |
2316 | of them while we're not actually debugging. */ | |
2317 | bfd_cache_close_all (); | |
136d6dae VP |
2318 | } |
2319 | ||
424163ea DJ |
2320 | /* Look for a target which can describe architectural features, starting |
2321 | from TARGET. If we find one, return its description. */ | |
2322 | ||
2323 | const struct target_desc * | |
2324 | target_read_description (struct target_ops *target) | |
2325 | { | |
2117c711 | 2326 | return target->to_read_description (target); |
424163ea DJ |
2327 | } |
2328 | ||
58a5184e | 2329 | /* This implements a basic search of memory, reading target memory and |
08388c79 DE |
2330 | performing the search here (as opposed to performing the search in on the |
2331 | target side with, for example, gdbserver). */ | |
2332 | ||
2333 | int | |
2334 | simple_search_memory (struct target_ops *ops, | |
2335 | CORE_ADDR start_addr, ULONGEST search_space_len, | |
2336 | const gdb_byte *pattern, ULONGEST pattern_len, | |
2337 | CORE_ADDR *found_addrp) | |
2338 | { | |
2339 | /* NOTE: also defined in find.c testcase. */ | |
2340 | #define SEARCH_CHUNK_SIZE 16000 | |
2341 | const unsigned chunk_size = SEARCH_CHUNK_SIZE; | |
2342 | /* Buffer to hold memory contents for searching. */ | |
08388c79 | 2343 | unsigned search_buf_size; |
08388c79 DE |
2344 | |
2345 | search_buf_size = chunk_size + pattern_len - 1; | |
2346 | ||
2347 | /* No point in trying to allocate a buffer larger than the search space. */ | |
2348 | if (search_space_len < search_buf_size) | |
2349 | search_buf_size = search_space_len; | |
2350 | ||
26fcd5d7 | 2351 | gdb::byte_vector search_buf (search_buf_size); |
08388c79 DE |
2352 | |
2353 | /* Prime the search buffer. */ | |
2354 | ||
2355 | if (target_read (ops, TARGET_OBJECT_MEMORY, NULL, | |
26fcd5d7 TT |
2356 | search_buf.data (), start_addr, search_buf_size) |
2357 | != search_buf_size) | |
08388c79 | 2358 | { |
b3dc46ff AB |
2359 | warning (_("Unable to access %s bytes of target " |
2360 | "memory at %s, halting search."), | |
2361 | pulongest (search_buf_size), hex_string (start_addr)); | |
08388c79 DE |
2362 | return -1; |
2363 | } | |
2364 | ||
2365 | /* Perform the search. | |
2366 | ||
2367 | The loop is kept simple by allocating [N + pattern-length - 1] bytes. | |
2368 | When we've scanned N bytes we copy the trailing bytes to the start and | |
2369 | read in another N bytes. */ | |
2370 | ||
2371 | while (search_space_len >= pattern_len) | |
2372 | { | |
2373 | gdb_byte *found_ptr; | |
325fac50 PA |
2374 | unsigned nr_search_bytes |
2375 | = std::min (search_space_len, (ULONGEST) search_buf_size); | |
08388c79 | 2376 | |
26fcd5d7 | 2377 | found_ptr = (gdb_byte *) memmem (search_buf.data (), nr_search_bytes, |
d7f3ff3e | 2378 | pattern, pattern_len); |
08388c79 DE |
2379 | |
2380 | if (found_ptr != NULL) | |
2381 | { | |
26fcd5d7 | 2382 | CORE_ADDR found_addr = start_addr + (found_ptr - search_buf.data ()); |
5d502164 | 2383 | |
08388c79 | 2384 | *found_addrp = found_addr; |
08388c79 DE |
2385 | return 1; |
2386 | } | |
2387 | ||
2388 | /* Not found in this chunk, skip to next chunk. */ | |
2389 | ||
2390 | /* Don't let search_space_len wrap here, it's unsigned. */ | |
2391 | if (search_space_len >= chunk_size) | |
2392 | search_space_len -= chunk_size; | |
2393 | else | |
2394 | search_space_len = 0; | |
2395 | ||
2396 | if (search_space_len >= pattern_len) | |
2397 | { | |
2398 | unsigned keep_len = search_buf_size - chunk_size; | |
8a35fb51 | 2399 | CORE_ADDR read_addr = start_addr + chunk_size + keep_len; |
08388c79 DE |
2400 | int nr_to_read; |
2401 | ||
2402 | /* Copy the trailing part of the previous iteration to the front | |
2403 | of the buffer for the next iteration. */ | |
2404 | gdb_assert (keep_len == pattern_len - 1); | |
26fcd5d7 | 2405 | memcpy (&search_buf[0], &search_buf[chunk_size], keep_len); |
08388c79 | 2406 | |
325fac50 PA |
2407 | nr_to_read = std::min (search_space_len - keep_len, |
2408 | (ULONGEST) chunk_size); | |
08388c79 DE |
2409 | |
2410 | if (target_read (ops, TARGET_OBJECT_MEMORY, NULL, | |
26fcd5d7 | 2411 | &search_buf[keep_len], read_addr, |
08388c79 DE |
2412 | nr_to_read) != nr_to_read) |
2413 | { | |
b3dc46ff | 2414 | warning (_("Unable to access %s bytes of target " |
9b20d036 | 2415 | "memory at %s, halting search."), |
b3dc46ff | 2416 | plongest (nr_to_read), |
08388c79 | 2417 | hex_string (read_addr)); |
08388c79 DE |
2418 | return -1; |
2419 | } | |
2420 | ||
2421 | start_addr += chunk_size; | |
2422 | } | |
2423 | } | |
2424 | ||
2425 | /* Not found. */ | |
2426 | ||
08388c79 DE |
2427 | return 0; |
2428 | } | |
2429 | ||
58a5184e TT |
2430 | /* Default implementation of memory-searching. */ |
2431 | ||
2432 | static int | |
2433 | default_search_memory (struct target_ops *self, | |
2434 | CORE_ADDR start_addr, ULONGEST search_space_len, | |
2435 | const gdb_byte *pattern, ULONGEST pattern_len, | |
2436 | CORE_ADDR *found_addrp) | |
2437 | { | |
2438 | /* Start over from the top of the target stack. */ | |
2439 | return simple_search_memory (current_target.beneath, | |
2440 | start_addr, search_space_len, | |
2441 | pattern, pattern_len, found_addrp); | |
2442 | } | |
2443 | ||
08388c79 DE |
2444 | /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the |
2445 | sequence of bytes in PATTERN with length PATTERN_LEN. | |
2446 | ||
2447 | The result is 1 if found, 0 if not found, and -1 if there was an error | |
2448 | requiring halting of the search (e.g. memory read error). | |
2449 | If the pattern is found the address is recorded in FOUND_ADDRP. */ | |
2450 | ||
2451 | int | |
2452 | target_search_memory (CORE_ADDR start_addr, ULONGEST search_space_len, | |
2453 | const gdb_byte *pattern, ULONGEST pattern_len, | |
2454 | CORE_ADDR *found_addrp) | |
2455 | { | |
a7068b60 TT |
2456 | return current_target.to_search_memory (¤t_target, start_addr, |
2457 | search_space_len, | |
2458 | pattern, pattern_len, found_addrp); | |
08388c79 DE |
2459 | } |
2460 | ||
8edfe269 DJ |
2461 | /* Look through the currently pushed targets. If none of them will |
2462 | be able to restart the currently running process, issue an error | |
2463 | message. */ | |
2464 | ||
2465 | void | |
2466 | target_require_runnable (void) | |
2467 | { | |
2468 | struct target_ops *t; | |
2469 | ||
2470 | for (t = target_stack; t != NULL; t = t->beneath) | |
2471 | { | |
2472 | /* If this target knows how to create a new program, then | |
2473 | assume we will still be able to after killing the current | |
2474 | one. Either killing and mourning will not pop T, or else | |
2475 | find_default_run_target will find it again. */ | |
2476 | if (t->to_create_inferior != NULL) | |
2477 | return; | |
2478 | ||
548740d6 | 2479 | /* Do not worry about targets at certain strata that can not |
8edfe269 DJ |
2480 | create inferiors. Assume they will be pushed again if |
2481 | necessary, and continue to the process_stratum. */ | |
85e747d2 | 2482 | if (t->to_stratum == thread_stratum |
548740d6 | 2483 | || t->to_stratum == record_stratum |
85e747d2 | 2484 | || t->to_stratum == arch_stratum) |
8edfe269 DJ |
2485 | continue; |
2486 | ||
3e43a32a MS |
2487 | error (_("The \"%s\" target does not support \"run\". " |
2488 | "Try \"help target\" or \"continue\"."), | |
8edfe269 DJ |
2489 | t->to_shortname); |
2490 | } | |
2491 | ||
2492 | /* This function is only called if the target is running. In that | |
2493 | case there should have been a process_stratum target and it | |
c378eb4e | 2494 | should either know how to create inferiors, or not... */ |
9b20d036 | 2495 | internal_error (__FILE__, __LINE__, _("No targets found")); |
8edfe269 DJ |
2496 | } |
2497 | ||
6a3cb8e8 PA |
2498 | /* Whether GDB is allowed to fall back to the default run target for |
2499 | "run", "attach", etc. when no target is connected yet. */ | |
2500 | static int auto_connect_native_target = 1; | |
2501 | ||
2502 | static void | |
2503 | show_auto_connect_native_target (struct ui_file *file, int from_tty, | |
2504 | struct cmd_list_element *c, const char *value) | |
2505 | { | |
2506 | fprintf_filtered (file, | |
2507 | _("Whether GDB may automatically connect to the " | |
2508 | "native target is %s.\n"), | |
2509 | value); | |
2510 | } | |
2511 | ||
c906108c SS |
2512 | /* Look through the list of possible targets for a target that can |
2513 | execute a run or attach command without any other data. This is | |
2514 | used to locate the default process stratum. | |
2515 | ||
5f667f2d PA |
2516 | If DO_MESG is not NULL, the result is always valid (error() is |
2517 | called for errors); else, return NULL on error. */ | |
c906108c SS |
2518 | |
2519 | static struct target_ops * | |
a121b7c1 | 2520 | find_default_run_target (const char *do_mesg) |
c906108c | 2521 | { |
c906108c | 2522 | struct target_ops *runable = NULL; |
c906108c | 2523 | |
6a3cb8e8 | 2524 | if (auto_connect_native_target) |
c906108c | 2525 | { |
89a1c21a | 2526 | struct target_ops *t; |
6a3cb8e8 | 2527 | int count = 0; |
89a1c21a | 2528 | int i; |
6a3cb8e8 | 2529 | |
89a1c21a | 2530 | for (i = 0; VEC_iterate (target_ops_p, target_structs, i, t); ++i) |
c906108c | 2531 | { |
89a1c21a | 2532 | if (t->to_can_run != delegate_can_run && target_can_run (t)) |
6a3cb8e8 | 2533 | { |
89a1c21a | 2534 | runable = t; |
6a3cb8e8 PA |
2535 | ++count; |
2536 | } | |
c906108c | 2537 | } |
6a3cb8e8 PA |
2538 | |
2539 | if (count != 1) | |
2540 | runable = NULL; | |
c906108c SS |
2541 | } |
2542 | ||
6a3cb8e8 | 2543 | if (runable == NULL) |
5f667f2d PA |
2544 | { |
2545 | if (do_mesg) | |
2546 | error (_("Don't know how to %s. Try \"help target\"."), do_mesg); | |
2547 | else | |
2548 | return NULL; | |
2549 | } | |
c906108c SS |
2550 | |
2551 | return runable; | |
2552 | } | |
2553 | ||
b3ccfe11 | 2554 | /* See target.h. */ |
c906108c | 2555 | |
b3ccfe11 TT |
2556 | struct target_ops * |
2557 | find_attach_target (void) | |
c906108c SS |
2558 | { |
2559 | struct target_ops *t; | |
2560 | ||
b3ccfe11 TT |
2561 | /* If a target on the current stack can attach, use it. */ |
2562 | for (t = current_target.beneath; t != NULL; t = t->beneath) | |
2563 | { | |
2564 | if (t->to_attach != NULL) | |
2565 | break; | |
2566 | } | |
c906108c | 2567 | |
b3ccfe11 TT |
2568 | /* Otherwise, use the default run target for attaching. */ |
2569 | if (t == NULL) | |
2570 | t = find_default_run_target ("attach"); | |
b84876c2 | 2571 | |
b3ccfe11 | 2572 | return t; |
b84876c2 PA |
2573 | } |
2574 | ||
b3ccfe11 | 2575 | /* See target.h. */ |
b84876c2 | 2576 | |
b3ccfe11 TT |
2577 | struct target_ops * |
2578 | find_run_target (void) | |
9908b566 VP |
2579 | { |
2580 | struct target_ops *t; | |
2581 | ||
b3ccfe11 TT |
2582 | /* If a target on the current stack can attach, use it. */ |
2583 | for (t = current_target.beneath; t != NULL; t = t->beneath) | |
2584 | { | |
2585 | if (t->to_create_inferior != NULL) | |
2586 | break; | |
2587 | } | |
5d502164 | 2588 | |
b3ccfe11 TT |
2589 | /* Otherwise, use the default run target. */ |
2590 | if (t == NULL) | |
2591 | t = find_default_run_target ("run"); | |
9908b566 | 2592 | |
b3ccfe11 | 2593 | return t; |
9908b566 VP |
2594 | } |
2595 | ||
145b16a9 UW |
2596 | /* Implement the "info proc" command. */ |
2597 | ||
451b7c33 | 2598 | int |
7bc112c1 | 2599 | target_info_proc (const char *args, enum info_proc_what what) |
145b16a9 UW |
2600 | { |
2601 | struct target_ops *t; | |
2602 | ||
2603 | /* If we're already connected to something that can get us OS | |
2604 | related data, use it. Otherwise, try using the native | |
2605 | target. */ | |
2606 | if (current_target.to_stratum >= process_stratum) | |
2607 | t = current_target.beneath; | |
2608 | else | |
2609 | t = find_default_run_target (NULL); | |
2610 | ||
2611 | for (; t != NULL; t = t->beneath) | |
2612 | { | |
2613 | if (t->to_info_proc != NULL) | |
2614 | { | |
2615 | t->to_info_proc (t, args, what); | |
2616 | ||
2617 | if (targetdebug) | |
2618 | fprintf_unfiltered (gdb_stdlog, | |
2619 | "target_info_proc (\"%s\", %d)\n", args, what); | |
2620 | ||
451b7c33 | 2621 | return 1; |
145b16a9 UW |
2622 | } |
2623 | } | |
2624 | ||
451b7c33 | 2625 | return 0; |
145b16a9 UW |
2626 | } |
2627 | ||
03583c20 | 2628 | static int |
2bfc0540 | 2629 | find_default_supports_disable_randomization (struct target_ops *self) |
03583c20 UW |
2630 | { |
2631 | struct target_ops *t; | |
2632 | ||
2633 | t = find_default_run_target (NULL); | |
2634 | if (t && t->to_supports_disable_randomization) | |
2bfc0540 | 2635 | return (t->to_supports_disable_randomization) (t); |
03583c20 UW |
2636 | return 0; |
2637 | } | |
2638 | ||
2639 | int | |
2640 | target_supports_disable_randomization (void) | |
2641 | { | |
2642 | struct target_ops *t; | |
2643 | ||
2644 | for (t = ¤t_target; t != NULL; t = t->beneath) | |
2645 | if (t->to_supports_disable_randomization) | |
2bfc0540 | 2646 | return t->to_supports_disable_randomization (t); |
03583c20 UW |
2647 | |
2648 | return 0; | |
2649 | } | |
9908b566 | 2650 | |
1fb77080 SDJ |
2651 | /* See target/target.h. */ |
2652 | ||
2653 | int | |
2654 | target_supports_multi_process (void) | |
2655 | { | |
2656 | return (*current_target.to_supports_multi_process) (¤t_target); | |
2657 | } | |
2658 | ||
07e059b5 VP |
2659 | char * |
2660 | target_get_osdata (const char *type) | |
2661 | { | |
07e059b5 VP |
2662 | struct target_ops *t; |
2663 | ||
739ef7fb PA |
2664 | /* If we're already connected to something that can get us OS |
2665 | related data, use it. Otherwise, try using the native | |
2666 | target. */ | |
2667 | if (current_target.to_stratum >= process_stratum) | |
6d097e65 | 2668 | t = current_target.beneath; |
739ef7fb PA |
2669 | else |
2670 | t = find_default_run_target ("get OS data"); | |
07e059b5 VP |
2671 | |
2672 | if (!t) | |
2673 | return NULL; | |
2674 | ||
6d097e65 | 2675 | return target_read_stralloc (t, TARGET_OBJECT_OSDATA, type); |
07e059b5 VP |
2676 | } |
2677 | ||
8eaff7cd TT |
2678 | static struct address_space * |
2679 | default_thread_address_space (struct target_ops *self, ptid_t ptid) | |
6c95b8df PA |
2680 | { |
2681 | struct inferior *inf; | |
6c95b8df PA |
2682 | |
2683 | /* Fall-back to the "main" address space of the inferior. */ | |
c9657e70 | 2684 | inf = find_inferior_ptid (ptid); |
6c95b8df PA |
2685 | |
2686 | if (inf == NULL || inf->aspace == NULL) | |
3e43a32a | 2687 | internal_error (__FILE__, __LINE__, |
9b20d036 MS |
2688 | _("Can't determine the current " |
2689 | "address space of thread %s\n"), | |
6c95b8df PA |
2690 | target_pid_to_str (ptid)); |
2691 | ||
2692 | return inf->aspace; | |
2693 | } | |
2694 | ||
8eaff7cd TT |
2695 | /* Determine the current address space of thread PTID. */ |
2696 | ||
2697 | struct address_space * | |
2698 | target_thread_address_space (ptid_t ptid) | |
2699 | { | |
2700 | struct address_space *aspace; | |
2701 | ||
2702 | aspace = current_target.to_thread_address_space (¤t_target, ptid); | |
2703 | gdb_assert (aspace != NULL); | |
2704 | ||
8eaff7cd TT |
2705 | return aspace; |
2706 | } | |
2707 | ||
7313baad UW |
2708 | |
2709 | /* Target file operations. */ | |
2710 | ||
2711 | static struct target_ops * | |
2712 | default_fileio_target (void) | |
2713 | { | |
2714 | /* If we're already connected to something that can perform | |
2715 | file I/O, use it. Otherwise, try using the native target. */ | |
2716 | if (current_target.to_stratum >= process_stratum) | |
2717 | return current_target.beneath; | |
2718 | else | |
2719 | return find_default_run_target ("file I/O"); | |
2720 | } | |
2721 | ||
1c4b552b GB |
2722 | /* File handle for target file operations. */ |
2723 | ||
2724 | typedef struct | |
2725 | { | |
2726 | /* The target on which this file is open. */ | |
2727 | struct target_ops *t; | |
2728 | ||
2729 | /* The file descriptor on the target. */ | |
2730 | int fd; | |
2731 | } fileio_fh_t; | |
2732 | ||
2733 | DEF_VEC_O (fileio_fh_t); | |
2734 | ||
2735 | /* Vector of currently open file handles. The value returned by | |
2736 | target_fileio_open and passed as the FD argument to other | |
2737 | target_fileio_* functions is an index into this vector. This | |
2738 | vector's entries are never freed; instead, files are marked as | |
2739 | closed, and the handle becomes available for reuse. */ | |
2740 | static VEC (fileio_fh_t) *fileio_fhandles; | |
2741 | ||
2742 | /* Macro to check whether a fileio_fh_t represents a closed file. */ | |
2743 | #define is_closed_fileio_fh(fd) ((fd) < 0) | |
2744 | ||
2745 | /* Index into fileio_fhandles of the lowest handle that might be | |
2746 | closed. This permits handle reuse without searching the whole | |
2747 | list each time a new file is opened. */ | |
2748 | static int lowest_closed_fd; | |
2749 | ||
2750 | /* Acquire a target fileio file descriptor. */ | |
2751 | ||
2752 | static int | |
2753 | acquire_fileio_fd (struct target_ops *t, int fd) | |
2754 | { | |
870f88f7 | 2755 | fileio_fh_t *fh; |
1c4b552b GB |
2756 | |
2757 | gdb_assert (!is_closed_fileio_fh (fd)); | |
2758 | ||
2759 | /* Search for closed handles to reuse. */ | |
2760 | for (; | |
2761 | VEC_iterate (fileio_fh_t, fileio_fhandles, | |
2762 | lowest_closed_fd, fh); | |
2763 | lowest_closed_fd++) | |
2764 | if (is_closed_fileio_fh (fh->fd)) | |
2765 | break; | |
2766 | ||
2767 | /* Push a new handle if no closed handles were found. */ | |
2768 | if (lowest_closed_fd == VEC_length (fileio_fh_t, fileio_fhandles)) | |
2769 | fh = VEC_safe_push (fileio_fh_t, fileio_fhandles, NULL); | |
2770 | ||
2771 | /* Fill in the handle. */ | |
2772 | fh->t = t; | |
2773 | fh->fd = fd; | |
2774 | ||
2775 | /* Return its index, and start the next lookup at | |
2776 | the next index. */ | |
2777 | return lowest_closed_fd++; | |
2778 | } | |
2779 | ||
2780 | /* Release a target fileio file descriptor. */ | |
2781 | ||
2782 | static void | |
2783 | release_fileio_fd (int fd, fileio_fh_t *fh) | |
2784 | { | |
2785 | fh->fd = -1; | |
325fac50 | 2786 | lowest_closed_fd = std::min (lowest_closed_fd, fd); |
1c4b552b GB |
2787 | } |
2788 | ||
2789 | /* Return a pointer to the fileio_fhandle_t corresponding to FD. */ | |
2790 | ||
2791 | #define fileio_fd_to_fh(fd) \ | |
2792 | VEC_index (fileio_fh_t, fileio_fhandles, (fd)) | |
2793 | ||
4313b8c0 GB |
2794 | /* Helper for target_fileio_open and |
2795 | target_fileio_open_warn_if_slow. */ | |
12e2a5fd | 2796 | |
4313b8c0 GB |
2797 | static int |
2798 | target_fileio_open_1 (struct inferior *inf, const char *filename, | |
2799 | int flags, int mode, int warn_if_slow, | |
2800 | int *target_errno) | |
7313baad UW |
2801 | { |
2802 | struct target_ops *t; | |
2803 | ||
2804 | for (t = default_fileio_target (); t != NULL; t = t->beneath) | |
2805 | { | |
2806 | if (t->to_fileio_open != NULL) | |
2807 | { | |
07c138c8 | 2808 | int fd = t->to_fileio_open (t, inf, filename, flags, mode, |
4313b8c0 | 2809 | warn_if_slow, target_errno); |
7313baad | 2810 | |
1c4b552b GB |
2811 | if (fd < 0) |
2812 | fd = -1; | |
2813 | else | |
2814 | fd = acquire_fileio_fd (t, fd); | |
2815 | ||
7313baad UW |
2816 | if (targetdebug) |
2817 | fprintf_unfiltered (gdb_stdlog, | |
4313b8c0 | 2818 | "target_fileio_open (%d,%s,0x%x,0%o,%d)" |
07c138c8 GB |
2819 | " = %d (%d)\n", |
2820 | inf == NULL ? 0 : inf->num, | |
7313baad | 2821 | filename, flags, mode, |
4313b8c0 GB |
2822 | warn_if_slow, fd, |
2823 | fd != -1 ? 0 : *target_errno); | |
7313baad UW |
2824 | return fd; |
2825 | } | |
2826 | } | |
2827 | ||
2828 | *target_errno = FILEIO_ENOSYS; | |
2829 | return -1; | |
2830 | } | |
2831 | ||
12e2a5fd GB |
2832 | /* See target.h. */ |
2833 | ||
4313b8c0 GB |
2834 | int |
2835 | target_fileio_open (struct inferior *inf, const char *filename, | |
2836 | int flags, int mode, int *target_errno) | |
2837 | { | |
2838 | return target_fileio_open_1 (inf, filename, flags, mode, 0, | |
2839 | target_errno); | |
2840 | } | |
2841 | ||
2842 | /* See target.h. */ | |
2843 | ||
2844 | int | |
2845 | target_fileio_open_warn_if_slow (struct inferior *inf, | |
2846 | const char *filename, | |
2847 | int flags, int mode, int *target_errno) | |
2848 | { | |
2849 | return target_fileio_open_1 (inf, filename, flags, mode, 1, | |
2850 | target_errno); | |
2851 | } | |
2852 | ||
2853 | /* See target.h. */ | |
2854 | ||
7313baad UW |
2855 | int |
2856 | target_fileio_pwrite (int fd, const gdb_byte *write_buf, int len, | |
2857 | ULONGEST offset, int *target_errno) | |
2858 | { | |
1c4b552b GB |
2859 | fileio_fh_t *fh = fileio_fd_to_fh (fd); |
2860 | int ret = -1; | |
7313baad | 2861 | |
1c4b552b GB |
2862 | if (is_closed_fileio_fh (fh->fd)) |
2863 | *target_errno = EBADF; | |
2864 | else | |
2865 | ret = fh->t->to_fileio_pwrite (fh->t, fh->fd, write_buf, | |
2866 | len, offset, target_errno); | |
7313baad | 2867 | |
1c4b552b GB |
2868 | if (targetdebug) |
2869 | fprintf_unfiltered (gdb_stdlog, | |
2870 | "target_fileio_pwrite (%d,...,%d,%s) " | |
2871 | "= %d (%d)\n", | |
2872 | fd, len, pulongest (offset), | |
2873 | ret, ret != -1 ? 0 : *target_errno); | |
2874 | return ret; | |
7313baad UW |
2875 | } |
2876 | ||
12e2a5fd GB |
2877 | /* See target.h. */ |
2878 | ||
7313baad UW |
2879 | int |
2880 | target_fileio_pread (int fd, gdb_byte *read_buf, int len, | |
2881 | ULONGEST offset, int *target_errno) | |
2882 | { | |
1c4b552b GB |
2883 | fileio_fh_t *fh = fileio_fd_to_fh (fd); |
2884 | int ret = -1; | |
7313baad | 2885 | |
1c4b552b GB |
2886 | if (is_closed_fileio_fh (fh->fd)) |
2887 | *target_errno = EBADF; | |
2888 | else | |
2889 | ret = fh->t->to_fileio_pread (fh->t, fh->fd, read_buf, | |
2890 | len, offset, target_errno); | |
7313baad | 2891 | |
1c4b552b GB |
2892 | if (targetdebug) |
2893 | fprintf_unfiltered (gdb_stdlog, | |
2894 | "target_fileio_pread (%d,...,%d,%s) " | |
2895 | "= %d (%d)\n", | |
2896 | fd, len, pulongest (offset), | |
2897 | ret, ret != -1 ? 0 : *target_errno); | |
9b15c1f0 GB |
2898 | return ret; |
2899 | } | |
2900 | ||
2901 | /* See target.h. */ | |
12e2a5fd | 2902 | |
9b15c1f0 GB |
2903 | int |
2904 | target_fileio_fstat (int fd, struct stat *sb, int *target_errno) | |
2905 | { | |
2906 | fileio_fh_t *fh = fileio_fd_to_fh (fd); | |
2907 | int ret = -1; | |
2908 | ||
2909 | if (is_closed_fileio_fh (fh->fd)) | |
2910 | *target_errno = EBADF; | |
2911 | else | |
2912 | ret = fh->t->to_fileio_fstat (fh->t, fh->fd, sb, target_errno); | |
2913 | ||
2914 | if (targetdebug) | |
2915 | fprintf_unfiltered (gdb_stdlog, | |
2916 | "target_fileio_fstat (%d) = %d (%d)\n", | |
2917 | fd, ret, ret != -1 ? 0 : *target_errno); | |
1c4b552b | 2918 | return ret; |
7313baad UW |
2919 | } |
2920 | ||
12e2a5fd GB |
2921 | /* See target.h. */ |
2922 | ||
7313baad UW |
2923 | int |
2924 | target_fileio_close (int fd, int *target_errno) | |
2925 | { | |
1c4b552b GB |
2926 | fileio_fh_t *fh = fileio_fd_to_fh (fd); |
2927 | int ret = -1; | |
7313baad | 2928 | |
1c4b552b GB |
2929 | if (is_closed_fileio_fh (fh->fd)) |
2930 | *target_errno = EBADF; | |
2931 | else | |
7313baad | 2932 | { |
1c4b552b GB |
2933 | ret = fh->t->to_fileio_close (fh->t, fh->fd, target_errno); |
2934 | release_fileio_fd (fd, fh); | |
7313baad UW |
2935 | } |
2936 | ||
1c4b552b GB |
2937 | if (targetdebug) |
2938 | fprintf_unfiltered (gdb_stdlog, | |
2939 | "target_fileio_close (%d) = %d (%d)\n", | |
2940 | fd, ret, ret != -1 ? 0 : *target_errno); | |
2941 | return ret; | |
7313baad UW |
2942 | } |
2943 | ||
12e2a5fd GB |
2944 | /* See target.h. */ |
2945 | ||
7313baad | 2946 | int |
07c138c8 GB |
2947 | target_fileio_unlink (struct inferior *inf, const char *filename, |
2948 | int *target_errno) | |
7313baad UW |
2949 | { |
2950 | struct target_ops *t; | |
2951 | ||
2952 | for (t = default_fileio_target (); t != NULL; t = t->beneath) | |
2953 | { | |
2954 | if (t->to_fileio_unlink != NULL) | |
2955 | { | |
07c138c8 GB |
2956 | int ret = t->to_fileio_unlink (t, inf, filename, |
2957 | target_errno); | |
7313baad UW |
2958 | |
2959 | if (targetdebug) | |
2960 | fprintf_unfiltered (gdb_stdlog, | |
07c138c8 GB |
2961 | "target_fileio_unlink (%d,%s)" |
2962 | " = %d (%d)\n", | |
2963 | inf == NULL ? 0 : inf->num, filename, | |
2964 | ret, ret != -1 ? 0 : *target_errno); | |
7313baad UW |
2965 | return ret; |
2966 | } | |
2967 | } | |
2968 | ||
2969 | *target_errno = FILEIO_ENOSYS; | |
2970 | return -1; | |
2971 | } | |
2972 | ||
12e2a5fd GB |
2973 | /* See target.h. */ |
2974 | ||
b9e7b9c3 | 2975 | char * |
07c138c8 GB |
2976 | target_fileio_readlink (struct inferior *inf, const char *filename, |
2977 | int *target_errno) | |
b9e7b9c3 UW |
2978 | { |
2979 | struct target_ops *t; | |
2980 | ||
2981 | for (t = default_fileio_target (); t != NULL; t = t->beneath) | |
2982 | { | |
2983 | if (t->to_fileio_readlink != NULL) | |
2984 | { | |
07c138c8 GB |
2985 | char *ret = t->to_fileio_readlink (t, inf, filename, |
2986 | target_errno); | |
b9e7b9c3 UW |
2987 | |
2988 | if (targetdebug) | |
2989 | fprintf_unfiltered (gdb_stdlog, | |
07c138c8 GB |
2990 | "target_fileio_readlink (%d,%s)" |
2991 | " = %s (%d)\n", | |
2992 | inf == NULL ? 0 : inf->num, | |
b9e7b9c3 UW |
2993 | filename, ret? ret : "(nil)", |
2994 | ret? 0 : *target_errno); | |
2995 | return ret; | |
2996 | } | |
2997 | } | |
2998 | ||
2999 | *target_errno = FILEIO_ENOSYS; | |
3000 | return NULL; | |
3001 | } | |
3002 | ||
7313baad UW |
3003 | static void |
3004 | target_fileio_close_cleanup (void *opaque) | |
3005 | { | |
3006 | int fd = *(int *) opaque; | |
3007 | int target_errno; | |
3008 | ||
3009 | target_fileio_close (fd, &target_errno); | |
3010 | } | |
3011 | ||
07c138c8 GB |
3012 | /* Read target file FILENAME, in the filesystem as seen by INF. If |
3013 | INF is NULL, use the filesystem seen by the debugger (GDB or, for | |
3014 | remote targets, the remote stub). Store the result in *BUF_P and | |
3015 | return the size of the transferred data. PADDING additional bytes | |
3016 | are available in *BUF_P. This is a helper function for | |
3017 | target_fileio_read_alloc; see the declaration of that function for | |
3018 | more information. */ | |
7313baad | 3019 | |
f7af1fcd JK |
3020 | static LONGEST |
3021 | target_fileio_read_alloc_1 (struct inferior *inf, const char *filename, | |
3022 | gdb_byte **buf_p, int padding) | |
3023 | { | |
3024 | struct cleanup *close_cleanup; | |
db1ff28b JK |
3025 | size_t buf_alloc, buf_pos; |
3026 | gdb_byte *buf; | |
3027 | LONGEST n; | |
3028 | int fd; | |
3029 | int target_errno; | |
f7af1fcd | 3030 | |
db1ff28b JK |
3031 | fd = target_fileio_open (inf, filename, FILEIO_O_RDONLY, 0700, |
3032 | &target_errno); | |
f7af1fcd JK |
3033 | if (fd == -1) |
3034 | return -1; | |
3035 | ||
3036 | close_cleanup = make_cleanup (target_fileio_close_cleanup, &fd); | |
db1ff28b JK |
3037 | |
3038 | /* Start by reading up to 4K at a time. The target will throttle | |
3039 | this number down if necessary. */ | |
3040 | buf_alloc = 4096; | |
224c3ddb | 3041 | buf = (gdb_byte *) xmalloc (buf_alloc); |
db1ff28b JK |
3042 | buf_pos = 0; |
3043 | while (1) | |
3044 | { | |
3045 | n = target_fileio_pread (fd, &buf[buf_pos], | |
3046 | buf_alloc - buf_pos - padding, buf_pos, | |
3047 | &target_errno); | |
3048 | if (n < 0) | |
3049 | { | |
3050 | /* An error occurred. */ | |
3051 | do_cleanups (close_cleanup); | |
3052 | xfree (buf); | |
3053 | return -1; | |
3054 | } | |
3055 | else if (n == 0) | |
3056 | { | |
3057 | /* Read all there was. */ | |
3058 | do_cleanups (close_cleanup); | |
3059 | if (buf_pos == 0) | |
3060 | xfree (buf); | |
3061 | else | |
3062 | *buf_p = buf; | |
3063 | return buf_pos; | |
3064 | } | |
3065 | ||
3066 | buf_pos += n; | |
3067 | ||
3068 | /* If the buffer is filling up, expand it. */ | |
3069 | if (buf_alloc < buf_pos * 2) | |
3070 | { | |
3071 | buf_alloc *= 2; | |
224c3ddb | 3072 | buf = (gdb_byte *) xrealloc (buf, buf_alloc); |
db1ff28b JK |
3073 | } |
3074 | ||
3075 | QUIT; | |
3076 | } | |
f7af1fcd JK |
3077 | } |
3078 | ||
12e2a5fd | 3079 | /* See target.h. */ |
7313baad UW |
3080 | |
3081 | LONGEST | |
07c138c8 GB |
3082 | target_fileio_read_alloc (struct inferior *inf, const char *filename, |
3083 | gdb_byte **buf_p) | |
7313baad | 3084 | { |
07c138c8 | 3085 | return target_fileio_read_alloc_1 (inf, filename, buf_p, 0); |
7313baad UW |
3086 | } |
3087 | ||
db1ff28b | 3088 | /* See target.h. */ |
f7af1fcd JK |
3089 | |
3090 | char * | |
3091 | target_fileio_read_stralloc (struct inferior *inf, const char *filename) | |
3092 | { | |
db1ff28b JK |
3093 | gdb_byte *buffer; |
3094 | char *bufstr; | |
3095 | LONGEST i, transferred; | |
3096 | ||
3097 | transferred = target_fileio_read_alloc_1 (inf, filename, &buffer, 1); | |
3098 | bufstr = (char *) buffer; | |
3099 | ||
3100 | if (transferred < 0) | |
3101 | return NULL; | |
3102 | ||
3103 | if (transferred == 0) | |
3104 | return xstrdup (""); | |
3105 | ||
3106 | bufstr[transferred] = 0; | |
3107 | ||
3108 | /* Check for embedded NUL bytes; but allow trailing NULs. */ | |
3109 | for (i = strlen (bufstr); i < transferred; i++) | |
3110 | if (bufstr[i] != 0) | |
3111 | { | |
3112 | warning (_("target file %s " | |
3113 | "contained unexpected null characters"), | |
3114 | filename); | |
3115 | break; | |
3116 | } | |
3117 | ||
3118 | return bufstr; | |
f7af1fcd | 3119 | } |
7313baad | 3120 | |
db1ff28b | 3121 | |
e0d24f8d | 3122 | static int |
31568a15 TT |
3123 | default_region_ok_for_hw_watchpoint (struct target_ops *self, |
3124 | CORE_ADDR addr, int len) | |
e0d24f8d | 3125 | { |
f5656ead | 3126 | return (len <= gdbarch_ptr_bit (target_gdbarch ()) / TARGET_CHAR_BIT); |
ccaa32c7 GS |
3127 | } |
3128 | ||
5009afc5 AS |
3129 | static int |
3130 | default_watchpoint_addr_within_range (struct target_ops *target, | |
3131 | CORE_ADDR addr, | |
3132 | CORE_ADDR start, int length) | |
3133 | { | |
3134 | return addr >= start && addr < start + length; | |
3135 | } | |
3136 | ||
c2250ad1 UW |
3137 | static struct gdbarch * |
3138 | default_thread_architecture (struct target_ops *ops, ptid_t ptid) | |
3139 | { | |
5cd63fda PA |
3140 | inferior *inf = find_inferior_ptid (ptid); |
3141 | gdb_assert (inf != NULL); | |
3142 | return inf->gdbarch; | |
c2250ad1 UW |
3143 | } |
3144 | ||
c906108c | 3145 | static int |
555bbdeb TT |
3146 | return_zero (struct target_ops *ignore) |
3147 | { | |
3148 | return 0; | |
3149 | } | |
3150 | ||
3151 | static int | |
3152 | return_zero_has_execution (struct target_ops *ignore, ptid_t ignore2) | |
c906108c SS |
3153 | { |
3154 | return 0; | |
3155 | } | |
3156 | ||
ed9a39eb JM |
3157 | /* |
3158 | * Find the next target down the stack from the specified target. | |
3159 | */ | |
3160 | ||
3161 | struct target_ops * | |
fba45db2 | 3162 | find_target_beneath (struct target_ops *t) |
ed9a39eb | 3163 | { |
258b763a | 3164 | return t->beneath; |
ed9a39eb JM |
3165 | } |
3166 | ||
8b06beed TT |
3167 | /* See target.h. */ |
3168 | ||
3169 | struct target_ops * | |
3170 | find_target_at (enum strata stratum) | |
3171 | { | |
3172 | struct target_ops *t; | |
3173 | ||
3174 | for (t = current_target.beneath; t != NULL; t = t->beneath) | |
3175 | if (t->to_stratum == stratum) | |
3176 | return t; | |
3177 | ||
3178 | return NULL; | |
3179 | } | |
3180 | ||
c906108c | 3181 | \f |
0f48b757 PA |
3182 | |
3183 | /* See target.h */ | |
3184 | ||
3185 | void | |
3186 | target_announce_detach (int from_tty) | |
3187 | { | |
3188 | pid_t pid; | |
a121b7c1 | 3189 | const char *exec_file; |
0f48b757 PA |
3190 | |
3191 | if (!from_tty) | |
3192 | return; | |
3193 | ||
3194 | exec_file = get_exec_file (0); | |
3195 | if (exec_file == NULL) | |
3196 | exec_file = ""; | |
3197 | ||
3198 | pid = ptid_get_pid (inferior_ptid); | |
3199 | printf_unfiltered (_("Detaching from program: %s, %s\n"), exec_file, | |
3200 | target_pid_to_str (pid_to_ptid (pid))); | |
3201 | gdb_flush (gdb_stdout); | |
3202 | } | |
3203 | ||
c906108c SS |
3204 | /* The inferior process has died. Long live the inferior! */ |
3205 | ||
3206 | void | |
fba45db2 | 3207 | generic_mourn_inferior (void) |
c906108c | 3208 | { |
7f9f62ba | 3209 | ptid_t ptid; |
c906108c | 3210 | |
7f9f62ba | 3211 | ptid = inferior_ptid; |
39f77062 | 3212 | inferior_ptid = null_ptid; |
7f9f62ba | 3213 | |
f59f708a PA |
3214 | /* Mark breakpoints uninserted in case something tries to delete a |
3215 | breakpoint while we delete the inferior's threads (which would | |
3216 | fail, since the inferior is long gone). */ | |
3217 | mark_breakpoints_out (); | |
3218 | ||
7f9f62ba PA |
3219 | if (!ptid_equal (ptid, null_ptid)) |
3220 | { | |
3221 | int pid = ptid_get_pid (ptid); | |
6c95b8df | 3222 | exit_inferior (pid); |
7f9f62ba PA |
3223 | } |
3224 | ||
f59f708a PA |
3225 | /* Note this wipes step-resume breakpoints, so needs to be done |
3226 | after exit_inferior, which ends up referencing the step-resume | |
3227 | breakpoints through clear_thread_inferior_resources. */ | |
c906108c | 3228 | breakpoint_init_inferior (inf_exited); |
f59f708a | 3229 | |
c906108c SS |
3230 | registers_changed (); |
3231 | ||
c906108c SS |
3232 | reopen_exec_file (); |
3233 | reinit_frame_cache (); | |
3234 | ||
9a4105ab AC |
3235 | if (deprecated_detach_hook) |
3236 | deprecated_detach_hook (); | |
c906108c SS |
3237 | } |
3238 | \f | |
fd0a2a6f MK |
3239 | /* Convert a normal process ID to a string. Returns the string in a |
3240 | static buffer. */ | |
c906108c | 3241 | |
7a114964 | 3242 | const char * |
39f77062 | 3243 | normal_pid_to_str (ptid_t ptid) |
c906108c | 3244 | { |
fd0a2a6f | 3245 | static char buf[32]; |
c906108c | 3246 | |
5fff8fc0 | 3247 | xsnprintf (buf, sizeof buf, "process %d", ptid_get_pid (ptid)); |
c906108c SS |
3248 | return buf; |
3249 | } | |
3250 | ||
7a114964 | 3251 | static const char * |
770234d3 | 3252 | default_pid_to_str (struct target_ops *ops, ptid_t ptid) |
117de6a9 PA |
3253 | { |
3254 | return normal_pid_to_str (ptid); | |
3255 | } | |
3256 | ||
9b4eba8e HZ |
3257 | /* Error-catcher for target_find_memory_regions. */ |
3258 | static int | |
2e73927c TT |
3259 | dummy_find_memory_regions (struct target_ops *self, |
3260 | find_memory_region_ftype ignore1, void *ignore2) | |
be4d1333 | 3261 | { |
9b4eba8e | 3262 | error (_("Command not implemented for this target.")); |
be4d1333 MS |
3263 | return 0; |
3264 | } | |
3265 | ||
9b4eba8e HZ |
3266 | /* Error-catcher for target_make_corefile_notes. */ |
3267 | static char * | |
fc6691b2 TT |
3268 | dummy_make_corefile_notes (struct target_ops *self, |
3269 | bfd *ignore1, int *ignore2) | |
be4d1333 | 3270 | { |
9b4eba8e | 3271 | error (_("Command not implemented for this target.")); |
be4d1333 MS |
3272 | return NULL; |
3273 | } | |
3274 | ||
c906108c SS |
3275 | /* Set up the handful of non-empty slots needed by the dummy target |
3276 | vector. */ | |
3277 | ||
3278 | static void | |
fba45db2 | 3279 | init_dummy_target (void) |
c906108c SS |
3280 | { |
3281 | dummy_target.to_shortname = "None"; | |
3282 | dummy_target.to_longname = "None"; | |
3283 | dummy_target.to_doc = ""; | |
03583c20 UW |
3284 | dummy_target.to_supports_disable_randomization |
3285 | = find_default_supports_disable_randomization; | |
c906108c | 3286 | dummy_target.to_stratum = dummy_stratum; |
555bbdeb TT |
3287 | dummy_target.to_has_all_memory = return_zero; |
3288 | dummy_target.to_has_memory = return_zero; | |
3289 | dummy_target.to_has_stack = return_zero; | |
3290 | dummy_target.to_has_registers = return_zero; | |
3291 | dummy_target.to_has_execution = return_zero_has_execution; | |
c906108c | 3292 | dummy_target.to_magic = OPS_MAGIC; |
1101cb7b TT |
3293 | |
3294 | install_dummy_methods (&dummy_target); | |
c906108c | 3295 | } |
c906108c | 3296 | \f |
c906108c | 3297 | |
f1c07ab0 | 3298 | void |
460014f5 | 3299 | target_close (struct target_ops *targ) |
f1c07ab0 | 3300 | { |
7fdc1521 TT |
3301 | gdb_assert (!target_is_pushed (targ)); |
3302 | ||
f1c07ab0 | 3303 | if (targ->to_xclose != NULL) |
460014f5 | 3304 | targ->to_xclose (targ); |
f1c07ab0 | 3305 | else if (targ->to_close != NULL) |
de90e03d | 3306 | targ->to_close (targ); |
947b8855 PA |
3307 | |
3308 | if (targetdebug) | |
460014f5 | 3309 | fprintf_unfiltered (gdb_stdlog, "target_close ()\n"); |
f1c07ab0 AC |
3310 | } |
3311 | ||
28439f5e PA |
3312 | int |
3313 | target_thread_alive (ptid_t ptid) | |
c906108c | 3314 | { |
a7068b60 | 3315 | return current_target.to_thread_alive (¤t_target, ptid); |
28439f5e PA |
3316 | } |
3317 | ||
3318 | void | |
e8032dde | 3319 | target_update_thread_list (void) |
28439f5e | 3320 | { |
e8032dde | 3321 | current_target.to_update_thread_list (¤t_target); |
c906108c SS |
3322 | } |
3323 | ||
d914c394 SS |
3324 | void |
3325 | target_stop (ptid_t ptid) | |
3326 | { | |
3327 | if (!may_stop) | |
3328 | { | |
3329 | warning (_("May not interrupt or stop the target, ignoring attempt")); | |
3330 | return; | |
3331 | } | |
3332 | ||
1eab8a48 | 3333 | (*current_target.to_stop) (¤t_target, ptid); |
d914c394 SS |
3334 | } |
3335 | ||
bfedc46a PA |
3336 | void |
3337 | target_interrupt (ptid_t ptid) | |
3338 | { | |
3339 | if (!may_stop) | |
3340 | { | |
3341 | warning (_("May not interrupt or stop the target, ignoring attempt")); | |
3342 | return; | |
3343 | } | |
3344 | ||
3345 | (*current_target.to_interrupt) (¤t_target, ptid); | |
3346 | } | |
3347 | ||
abc56d60 PA |
3348 | /* See target.h. */ |
3349 | ||
93692b58 PA |
3350 | void |
3351 | target_pass_ctrlc (void) | |
3352 | { | |
3353 | (*current_target.to_pass_ctrlc) (¤t_target); | |
3354 | } | |
3355 | ||
3356 | /* See target.h. */ | |
3357 | ||
3358 | void | |
3359 | default_target_pass_ctrlc (struct target_ops *ops) | |
3360 | { | |
3361 | target_interrupt (inferior_ptid); | |
3362 | } | |
3363 | ||
f8c1d06b GB |
3364 | /* See target/target.h. */ |
3365 | ||
3366 | void | |
03f4463b | 3367 | target_stop_and_wait (ptid_t ptid) |
f8c1d06b GB |
3368 | { |
3369 | struct target_waitstatus status; | |
3370 | int was_non_stop = non_stop; | |
3371 | ||
3372 | non_stop = 1; | |
3373 | target_stop (ptid); | |
3374 | ||
3375 | memset (&status, 0, sizeof (status)); | |
3376 | target_wait (ptid, &status, 0); | |
3377 | ||
3378 | non_stop = was_non_stop; | |
3379 | } | |
3380 | ||
3381 | /* See target/target.h. */ | |
3382 | ||
3383 | void | |
03f4463b | 3384 | target_continue_no_signal (ptid_t ptid) |
f8c1d06b GB |
3385 | { |
3386 | target_resume (ptid, 0, GDB_SIGNAL_0); | |
3387 | } | |
3388 | ||
049a8570 SDJ |
3389 | /* See target/target.h. */ |
3390 | ||
3391 | void | |
3392 | target_continue (ptid_t ptid, enum gdb_signal signal) | |
3393 | { | |
3394 | target_resume (ptid, 0, signal); | |
3395 | } | |
3396 | ||
09826ec5 PA |
3397 | /* Concatenate ELEM to LIST, a comma separate list, and return the |
3398 | result. The LIST incoming argument is released. */ | |
3399 | ||
3400 | static char * | |
3401 | str_comma_list_concat_elem (char *list, const char *elem) | |
3402 | { | |
3403 | if (list == NULL) | |
3404 | return xstrdup (elem); | |
3405 | else | |
3406 | return reconcat (list, list, ", ", elem, (char *) NULL); | |
3407 | } | |
3408 | ||
3409 | /* Helper for target_options_to_string. If OPT is present in | |
3410 | TARGET_OPTIONS, append the OPT_STR (string version of OPT) in RET. | |
3411 | Returns the new resulting string. OPT is removed from | |
3412 | TARGET_OPTIONS. */ | |
3413 | ||
3414 | static char * | |
3415 | do_option (int *target_options, char *ret, | |
a121b7c1 | 3416 | int opt, const char *opt_str) |
09826ec5 PA |
3417 | { |
3418 | if ((*target_options & opt) != 0) | |
3419 | { | |
3420 | ret = str_comma_list_concat_elem (ret, opt_str); | |
3421 | *target_options &= ~opt; | |
3422 | } | |
3423 | ||
3424 | return ret; | |
3425 | } | |
3426 | ||
3427 | char * | |
3428 | target_options_to_string (int target_options) | |
3429 | { | |
3430 | char *ret = NULL; | |
3431 | ||
3432 | #define DO_TARG_OPTION(OPT) \ | |
3433 | ret = do_option (&target_options, ret, OPT, #OPT) | |
3434 | ||
3435 | DO_TARG_OPTION (TARGET_WNOHANG); | |
3436 | ||
3437 | if (target_options != 0) | |
3438 | ret = str_comma_list_concat_elem (ret, "unknown???"); | |
3439 | ||
3440 | if (ret == NULL) | |
3441 | ret = xstrdup (""); | |
3442 | return ret; | |
3443 | } | |
3444 | ||
28439f5e PA |
3445 | void |
3446 | target_fetch_registers (struct regcache *regcache, int regno) | |
c906108c | 3447 | { |
ad5989bd TT |
3448 | current_target.to_fetch_registers (¤t_target, regcache, regno); |
3449 | if (targetdebug) | |
ef79d9a3 | 3450 | regcache->debug_print_register ("target_fetch_registers", regno); |
c906108c SS |
3451 | } |
3452 | ||
28439f5e PA |
3453 | void |
3454 | target_store_registers (struct regcache *regcache, int regno) | |
c906108c | 3455 | { |
d914c394 SS |
3456 | if (!may_write_registers) |
3457 | error (_("Writing to registers is not allowed (regno %d)"), regno); | |
3458 | ||
6b84065d TT |
3459 | current_target.to_store_registers (¤t_target, regcache, regno); |
3460 | if (targetdebug) | |
28439f5e | 3461 | { |
ef79d9a3 | 3462 | regcache->debug_print_register ("target_store_registers", regno); |
28439f5e | 3463 | } |
c906108c SS |
3464 | } |
3465 | ||
dc146f7c VP |
3466 | int |
3467 | target_core_of_thread (ptid_t ptid) | |
3468 | { | |
a7068b60 | 3469 | return current_target.to_core_of_thread (¤t_target, ptid); |
dc146f7c VP |
3470 | } |
3471 | ||
936d2992 PA |
3472 | int |
3473 | simple_verify_memory (struct target_ops *ops, | |
3474 | const gdb_byte *data, CORE_ADDR lma, ULONGEST size) | |
3475 | { | |
3476 | LONGEST total_xfered = 0; | |
3477 | ||
3478 | while (total_xfered < size) | |
3479 | { | |
3480 | ULONGEST xfered_len; | |
3481 | enum target_xfer_status status; | |
3482 | gdb_byte buf[1024]; | |
768adc05 | 3483 | ULONGEST howmuch = std::min<ULONGEST> (sizeof (buf), size - total_xfered); |
936d2992 PA |
3484 | |
3485 | status = target_xfer_partial (ops, TARGET_OBJECT_MEMORY, NULL, | |
3486 | buf, NULL, lma + total_xfered, howmuch, | |
3487 | &xfered_len); | |
3488 | if (status == TARGET_XFER_OK | |
3489 | && memcmp (data + total_xfered, buf, xfered_len) == 0) | |
3490 | { | |
3491 | total_xfered += xfered_len; | |
3492 | QUIT; | |
3493 | } | |
3494 | else | |
3495 | return 0; | |
3496 | } | |
3497 | return 1; | |
3498 | } | |
3499 | ||
3500 | /* Default implementation of memory verification. */ | |
3501 | ||
3502 | static int | |
3503 | default_verify_memory (struct target_ops *self, | |
3504 | const gdb_byte *data, CORE_ADDR memaddr, ULONGEST size) | |
3505 | { | |
3506 | /* Start over from the top of the target stack. */ | |
3507 | return simple_verify_memory (current_target.beneath, | |
3508 | data, memaddr, size); | |
3509 | } | |
3510 | ||
4a5e7a5b PA |
3511 | int |
3512 | target_verify_memory (const gdb_byte *data, CORE_ADDR memaddr, ULONGEST size) | |
3513 | { | |
a7068b60 TT |
3514 | return current_target.to_verify_memory (¤t_target, |
3515 | data, memaddr, size); | |
4a5e7a5b PA |
3516 | } |
3517 | ||
9c06b0b4 TJB |
3518 | /* The documentation for this function is in its prototype declaration in |
3519 | target.h. */ | |
3520 | ||
3521 | int | |
f4b0a671 SM |
3522 | target_insert_mask_watchpoint (CORE_ADDR addr, CORE_ADDR mask, |
3523 | enum target_hw_bp_type rw) | |
9c06b0b4 | 3524 | { |
a7068b60 TT |
3525 | return current_target.to_insert_mask_watchpoint (¤t_target, |
3526 | addr, mask, rw); | |
9c06b0b4 TJB |
3527 | } |
3528 | ||
3529 | /* The documentation for this function is in its prototype declaration in | |
3530 | target.h. */ | |
3531 | ||
3532 | int | |
f4b0a671 SM |
3533 | target_remove_mask_watchpoint (CORE_ADDR addr, CORE_ADDR mask, |
3534 | enum target_hw_bp_type rw) | |
9c06b0b4 | 3535 | { |
a7068b60 TT |
3536 | return current_target.to_remove_mask_watchpoint (¤t_target, |
3537 | addr, mask, rw); | |
9c06b0b4 TJB |
3538 | } |
3539 | ||
3540 | /* The documentation for this function is in its prototype declaration | |
3541 | in target.h. */ | |
3542 | ||
3543 | int | |
3544 | target_masked_watch_num_registers (CORE_ADDR addr, CORE_ADDR mask) | |
3545 | { | |
6c7e5e5c TT |
3546 | return current_target.to_masked_watch_num_registers (¤t_target, |
3547 | addr, mask); | |
9c06b0b4 TJB |
3548 | } |
3549 | ||
f1310107 TJB |
3550 | /* The documentation for this function is in its prototype declaration |
3551 | in target.h. */ | |
3552 | ||
3553 | int | |
3554 | target_ranged_break_num_registers (void) | |
3555 | { | |
a134316b | 3556 | return current_target.to_ranged_break_num_registers (¤t_target); |
f1310107 TJB |
3557 | } |
3558 | ||
02d27625 MM |
3559 | /* See target.h. */ |
3560 | ||
043c3577 MM |
3561 | int |
3562 | target_supports_btrace (enum btrace_format format) | |
3563 | { | |
3564 | return current_target.to_supports_btrace (¤t_target, format); | |
3565 | } | |
3566 | ||
3567 | /* See target.h. */ | |
3568 | ||
02d27625 | 3569 | struct btrace_target_info * |
f4abbc16 | 3570 | target_enable_btrace (ptid_t ptid, const struct btrace_config *conf) |
02d27625 | 3571 | { |
f4abbc16 | 3572 | return current_target.to_enable_btrace (¤t_target, ptid, conf); |
02d27625 MM |
3573 | } |
3574 | ||
3575 | /* See target.h. */ | |
3576 | ||
3577 | void | |
3578 | target_disable_btrace (struct btrace_target_info *btinfo) | |
3579 | { | |
8dc292d3 | 3580 | current_target.to_disable_btrace (¤t_target, btinfo); |
02d27625 MM |
3581 | } |
3582 | ||
3583 | /* See target.h. */ | |
3584 | ||
3585 | void | |
3586 | target_teardown_btrace (struct btrace_target_info *btinfo) | |
3587 | { | |
9ace480d | 3588 | current_target.to_teardown_btrace (¤t_target, btinfo); |
02d27625 MM |
3589 | } |
3590 | ||
3591 | /* See target.h. */ | |
3592 | ||
969c39fb | 3593 | enum btrace_error |
734b0e4b | 3594 | target_read_btrace (struct btrace_data *btrace, |
969c39fb | 3595 | struct btrace_target_info *btinfo, |
02d27625 MM |
3596 | enum btrace_read_type type) |
3597 | { | |
eb5b20d4 | 3598 | return current_target.to_read_btrace (¤t_target, btrace, btinfo, type); |
02d27625 MM |
3599 | } |
3600 | ||
d02ed0bb MM |
3601 | /* See target.h. */ |
3602 | ||
f4abbc16 MM |
3603 | const struct btrace_config * |
3604 | target_btrace_conf (const struct btrace_target_info *btinfo) | |
3605 | { | |
3606 | return current_target.to_btrace_conf (¤t_target, btinfo); | |
3607 | } | |
3608 | ||
3609 | /* See target.h. */ | |
3610 | ||
7c1687a9 MM |
3611 | void |
3612 | target_stop_recording (void) | |
3613 | { | |
ee97f592 | 3614 | current_target.to_stop_recording (¤t_target); |
7c1687a9 MM |
3615 | } |
3616 | ||
3617 | /* See target.h. */ | |
3618 | ||
d02ed0bb | 3619 | void |
85e1311a | 3620 | target_save_record (const char *filename) |
d02ed0bb | 3621 | { |
f09e2107 | 3622 | current_target.to_save_record (¤t_target, filename); |
d02ed0bb MM |
3623 | } |
3624 | ||
3625 | /* See target.h. */ | |
3626 | ||
3627 | int | |
3628 | target_supports_delete_record (void) | |
3629 | { | |
3630 | struct target_ops *t; | |
3631 | ||
3632 | for (t = current_target.beneath; t != NULL; t = t->beneath) | |
b0ed115f TT |
3633 | if (t->to_delete_record != delegate_delete_record |
3634 | && t->to_delete_record != tdefault_delete_record) | |
d02ed0bb MM |
3635 | return 1; |
3636 | ||
3637 | return 0; | |
3638 | } | |
3639 | ||
3640 | /* See target.h. */ | |
3641 | ||
3642 | void | |
3643 | target_delete_record (void) | |
3644 | { | |
07366925 | 3645 | current_target.to_delete_record (¤t_target); |
d02ed0bb MM |
3646 | } |
3647 | ||
3648 | /* See target.h. */ | |
3649 | ||
b158a20f TW |
3650 | enum record_method |
3651 | target_record_method (ptid_t ptid) | |
3652 | { | |
3653 | return current_target.to_record_method (¤t_target, ptid); | |
3654 | } | |
3655 | ||
3656 | /* See target.h. */ | |
3657 | ||
d02ed0bb | 3658 | int |
a52eab48 | 3659 | target_record_is_replaying (ptid_t ptid) |
d02ed0bb | 3660 | { |
a52eab48 | 3661 | return current_target.to_record_is_replaying (¤t_target, ptid); |
d02ed0bb MM |
3662 | } |
3663 | ||
3664 | /* See target.h. */ | |
3665 | ||
7ff27e9b MM |
3666 | int |
3667 | target_record_will_replay (ptid_t ptid, int dir) | |
3668 | { | |
3669 | return current_target.to_record_will_replay (¤t_target, ptid, dir); | |
3670 | } | |
3671 | ||
3672 | /* See target.h. */ | |
3673 | ||
797094dd MM |
3674 | void |
3675 | target_record_stop_replaying (void) | |
3676 | { | |
3677 | current_target.to_record_stop_replaying (¤t_target); | |
3678 | } | |
3679 | ||
3680 | /* See target.h. */ | |
3681 | ||
d02ed0bb MM |
3682 | void |
3683 | target_goto_record_begin (void) | |
3684 | { | |
671e76cc | 3685 | current_target.to_goto_record_begin (¤t_target); |
d02ed0bb MM |
3686 | } |
3687 | ||
3688 | /* See target.h. */ | |
3689 | ||
3690 | void | |
3691 | target_goto_record_end (void) | |
3692 | { | |
e9179bb3 | 3693 | current_target.to_goto_record_end (¤t_target); |
d02ed0bb MM |
3694 | } |
3695 | ||
3696 | /* See target.h. */ | |
3697 | ||
3698 | void | |
3699 | target_goto_record (ULONGEST insn) | |
3700 | { | |
05969c84 | 3701 | current_target.to_goto_record (¤t_target, insn); |
d02ed0bb MM |
3702 | } |
3703 | ||
67c86d06 MM |
3704 | /* See target.h. */ |
3705 | ||
3706 | void | |
9a24775b | 3707 | target_insn_history (int size, gdb_disassembly_flags flags) |
67c86d06 | 3708 | { |
3679abfa | 3709 | current_target.to_insn_history (¤t_target, size, flags); |
67c86d06 MM |
3710 | } |
3711 | ||
3712 | /* See target.h. */ | |
3713 | ||
3714 | void | |
9a24775b PA |
3715 | target_insn_history_from (ULONGEST from, int size, |
3716 | gdb_disassembly_flags flags) | |
67c86d06 | 3717 | { |
8444ab58 | 3718 | current_target.to_insn_history_from (¤t_target, from, size, flags); |
67c86d06 MM |
3719 | } |
3720 | ||
3721 | /* See target.h. */ | |
3722 | ||
3723 | void | |
9a24775b PA |
3724 | target_insn_history_range (ULONGEST begin, ULONGEST end, |
3725 | gdb_disassembly_flags flags) | |
67c86d06 | 3726 | { |
c29302cc | 3727 | current_target.to_insn_history_range (¤t_target, begin, end, flags); |
67c86d06 MM |
3728 | } |
3729 | ||
15984c13 MM |
3730 | /* See target.h. */ |
3731 | ||
3732 | void | |
3733 | target_call_history (int size, int flags) | |
3734 | { | |
170049d4 | 3735 | current_target.to_call_history (¤t_target, size, flags); |
15984c13 MM |
3736 | } |
3737 | ||
3738 | /* See target.h. */ | |
3739 | ||
3740 | void | |
3741 | target_call_history_from (ULONGEST begin, int size, int flags) | |
3742 | { | |
16fc27d6 | 3743 | current_target.to_call_history_from (¤t_target, begin, size, flags); |
15984c13 MM |
3744 | } |
3745 | ||
3746 | /* See target.h. */ | |
3747 | ||
3748 | void | |
3749 | target_call_history_range (ULONGEST begin, ULONGEST end, int flags) | |
3750 | { | |
115d9817 | 3751 | current_target.to_call_history_range (¤t_target, begin, end, flags); |
15984c13 MM |
3752 | } |
3753 | ||
ea001bdc MM |
3754 | /* See target.h. */ |
3755 | ||
3756 | const struct frame_unwind * | |
3757 | target_get_unwinder (void) | |
3758 | { | |
ac01945b | 3759 | return current_target.to_get_unwinder (¤t_target); |
ea001bdc MM |
3760 | } |
3761 | ||
3762 | /* See target.h. */ | |
3763 | ||
3764 | const struct frame_unwind * | |
3765 | target_get_tailcall_unwinder (void) | |
3766 | { | |
ac01945b | 3767 | return current_target.to_get_tailcall_unwinder (¤t_target); |
ea001bdc MM |
3768 | } |
3769 | ||
5fff78c4 MM |
3770 | /* See target.h. */ |
3771 | ||
3772 | void | |
3773 | target_prepare_to_generate_core (void) | |
3774 | { | |
3775 | current_target.to_prepare_to_generate_core (¤t_target); | |
3776 | } | |
3777 | ||
3778 | /* See target.h. */ | |
3779 | ||
3780 | void | |
3781 | target_done_generating_core (void) | |
3782 | { | |
3783 | current_target.to_done_generating_core (¤t_target); | |
3784 | } | |
3785 | ||
c906108c | 3786 | static void |
fba45db2 | 3787 | setup_target_debug (void) |
c906108c SS |
3788 | { |
3789 | memcpy (&debug_target, ¤t_target, sizeof debug_target); | |
3790 | ||
a7068b60 | 3791 | init_debug_target (¤t_target); |
c906108c | 3792 | } |
c906108c | 3793 | \f |
c5aa993b JM |
3794 | |
3795 | static char targ_desc[] = | |
3e43a32a MS |
3796 | "Names of targets and files being debugged.\nShows the entire \ |
3797 | stack of targets currently in use (including the exec-file,\n\ | |
c906108c SS |
3798 | core-file, and process, if any), as well as the symbol file name."; |
3799 | ||
a53f3625 | 3800 | static void |
a30bf1f1 TT |
3801 | default_rcmd (struct target_ops *self, const char *command, |
3802 | struct ui_file *output) | |
a53f3625 TT |
3803 | { |
3804 | error (_("\"monitor\" command not supported by this target.")); | |
3805 | } | |
3806 | ||
96baa820 JM |
3807 | static void |
3808 | do_monitor_command (char *cmd, | |
3809 | int from_tty) | |
3810 | { | |
96baa820 JM |
3811 | target_rcmd (cmd, gdb_stdtarg); |
3812 | } | |
3813 | ||
78cbbba8 LM |
3814 | /* Erases all the memory regions marked as flash. CMD and FROM_TTY are |
3815 | ignored. */ | |
3816 | ||
3817 | void | |
3818 | flash_erase_command (char *cmd, int from_tty) | |
3819 | { | |
3820 | /* Used to communicate termination of flash operations to the target. */ | |
3821 | bool found_flash_region = false; | |
3822 | struct mem_region *m; | |
3823 | struct gdbarch *gdbarch = target_gdbarch (); | |
3824 | ||
3825 | VEC(mem_region_s) *mem_regions = target_memory_map (); | |
3826 | ||
3827 | /* Iterate over all memory regions. */ | |
3828 | for (int i = 0; VEC_iterate (mem_region_s, mem_regions, i, m); i++) | |
3829 | { | |
3830 | /* Fetch the memory attribute. */ | |
3831 | struct mem_attrib *attrib = &m->attrib; | |
3832 | ||
3833 | /* Is this a flash memory region? */ | |
3834 | if (attrib->mode == MEM_FLASH) | |
3835 | { | |
3836 | found_flash_region = true; | |
3837 | target_flash_erase (m->lo, m->hi - m->lo); | |
3838 | ||
76f9c9cf | 3839 | ui_out_emit_tuple tuple_emitter (current_uiout, "erased-regions"); |
78cbbba8 LM |
3840 | |
3841 | current_uiout->message (_("Erasing flash memory region at address ")); | |
3842 | current_uiout->field_fmt ("address", "%s", paddress (gdbarch, | |
3843 | m->lo)); | |
3844 | current_uiout->message (", size = "); | |
3845 | current_uiout->field_fmt ("size", "%s", hex_string (m->hi - m->lo)); | |
3846 | current_uiout->message ("\n"); | |
78cbbba8 LM |
3847 | } |
3848 | } | |
3849 | ||
3850 | /* Did we do any flash operations? If so, we need to finalize them. */ | |
3851 | if (found_flash_region) | |
3852 | target_flash_done (); | |
3853 | else | |
3854 | current_uiout->message (_("No flash memory regions found.\n")); | |
3855 | } | |
3856 | ||
87680a14 JB |
3857 | /* Print the name of each layers of our target stack. */ |
3858 | ||
3859 | static void | |
d3cb6b99 | 3860 | maintenance_print_target_stack (const char *cmd, int from_tty) |
87680a14 JB |
3861 | { |
3862 | struct target_ops *t; | |
3863 | ||
3864 | printf_filtered (_("The current target stack is:\n")); | |
3865 | ||
3866 | for (t = target_stack; t != NULL; t = t->beneath) | |
3867 | { | |
3868 | printf_filtered (" - %s (%s)\n", t->to_shortname, t->to_longname); | |
3869 | } | |
3870 | } | |
3871 | ||
372316f1 PA |
3872 | /* See target.h. */ |
3873 | ||
3874 | void | |
3875 | target_async (int enable) | |
3876 | { | |
3877 | infrun_async (enable); | |
3878 | current_target.to_async (¤t_target, enable); | |
3879 | } | |
3880 | ||
65706a29 PA |
3881 | /* See target.h. */ |
3882 | ||
3883 | void | |
3884 | target_thread_events (int enable) | |
3885 | { | |
3886 | current_target.to_thread_events (¤t_target, enable); | |
3887 | } | |
3888 | ||
329ea579 PA |
3889 | /* Controls if targets can report that they can/are async. This is |
3890 | just for maintainers to use when debugging gdb. */ | |
3891 | int target_async_permitted = 1; | |
c6ebd6cf VP |
3892 | |
3893 | /* The set command writes to this variable. If the inferior is | |
b5419e49 | 3894 | executing, target_async_permitted is *not* updated. */ |
329ea579 | 3895 | static int target_async_permitted_1 = 1; |
c6ebd6cf VP |
3896 | |
3897 | static void | |
329ea579 PA |
3898 | maint_set_target_async_command (char *args, int from_tty, |
3899 | struct cmd_list_element *c) | |
c6ebd6cf | 3900 | { |
c35b1492 | 3901 | if (have_live_inferiors ()) |
c6ebd6cf VP |
3902 | { |
3903 | target_async_permitted_1 = target_async_permitted; | |
3904 | error (_("Cannot change this setting while the inferior is running.")); | |
3905 | } | |
3906 | ||
3907 | target_async_permitted = target_async_permitted_1; | |
3908 | } | |
3909 | ||
3910 | static void | |
329ea579 PA |
3911 | maint_show_target_async_command (struct ui_file *file, int from_tty, |
3912 | struct cmd_list_element *c, | |
3913 | const char *value) | |
c6ebd6cf | 3914 | { |
3e43a32a MS |
3915 | fprintf_filtered (file, |
3916 | _("Controlling the inferior in " | |
3917 | "asynchronous mode is %s.\n"), value); | |
c6ebd6cf VP |
3918 | } |
3919 | ||
fbea99ea PA |
3920 | /* Return true if the target operates in non-stop mode even with "set |
3921 | non-stop off". */ | |
3922 | ||
3923 | static int | |
3924 | target_always_non_stop_p (void) | |
3925 | { | |
3926 | return current_target.to_always_non_stop_p (¤t_target); | |
3927 | } | |
3928 | ||
3929 | /* See target.h. */ | |
3930 | ||
3931 | int | |
3932 | target_is_non_stop_p (void) | |
3933 | { | |
3934 | return (non_stop | |
3935 | || target_non_stop_enabled == AUTO_BOOLEAN_TRUE | |
3936 | || (target_non_stop_enabled == AUTO_BOOLEAN_AUTO | |
3937 | && target_always_non_stop_p ())); | |
3938 | } | |
3939 | ||
3940 | /* Controls if targets can report that they always run in non-stop | |
3941 | mode. This is just for maintainers to use when debugging gdb. */ | |
3942 | enum auto_boolean target_non_stop_enabled = AUTO_BOOLEAN_AUTO; | |
3943 | ||
3944 | /* The set command writes to this variable. If the inferior is | |
3945 | executing, target_non_stop_enabled is *not* updated. */ | |
3946 | static enum auto_boolean target_non_stop_enabled_1 = AUTO_BOOLEAN_AUTO; | |
3947 | ||
3948 | /* Implementation of "maint set target-non-stop". */ | |
3949 | ||
3950 | static void | |
3951 | maint_set_target_non_stop_command (char *args, int from_tty, | |
3952 | struct cmd_list_element *c) | |
3953 | { | |
3954 | if (have_live_inferiors ()) | |
3955 | { | |
3956 | target_non_stop_enabled_1 = target_non_stop_enabled; | |
3957 | error (_("Cannot change this setting while the inferior is running.")); | |
3958 | } | |
3959 | ||
3960 | target_non_stop_enabled = target_non_stop_enabled_1; | |
3961 | } | |
3962 | ||
3963 | /* Implementation of "maint show target-non-stop". */ | |
3964 | ||
3965 | static void | |
3966 | maint_show_target_non_stop_command (struct ui_file *file, int from_tty, | |
3967 | struct cmd_list_element *c, | |
3968 | const char *value) | |
3969 | { | |
3970 | if (target_non_stop_enabled == AUTO_BOOLEAN_AUTO) | |
3971 | fprintf_filtered (file, | |
3972 | _("Whether the target is always in non-stop mode " | |
3973 | "is %s (currently %s).\n"), value, | |
3974 | target_always_non_stop_p () ? "on" : "off"); | |
3975 | else | |
3976 | fprintf_filtered (file, | |
3977 | _("Whether the target is always in non-stop mode " | |
3978 | "is %s.\n"), value); | |
3979 | } | |
3980 | ||
d914c394 SS |
3981 | /* Temporary copies of permission settings. */ |
3982 | ||
3983 | static int may_write_registers_1 = 1; | |
3984 | static int may_write_memory_1 = 1; | |
3985 | static int may_insert_breakpoints_1 = 1; | |
3986 | static int may_insert_tracepoints_1 = 1; | |
3987 | static int may_insert_fast_tracepoints_1 = 1; | |
3988 | static int may_stop_1 = 1; | |
3989 | ||
3990 | /* Make the user-set values match the real values again. */ | |
3991 | ||
3992 | void | |
3993 | update_target_permissions (void) | |
3994 | { | |
3995 | may_write_registers_1 = may_write_registers; | |
3996 | may_write_memory_1 = may_write_memory; | |
3997 | may_insert_breakpoints_1 = may_insert_breakpoints; | |
3998 | may_insert_tracepoints_1 = may_insert_tracepoints; | |
3999 | may_insert_fast_tracepoints_1 = may_insert_fast_tracepoints; | |
4000 | may_stop_1 = may_stop; | |
4001 | } | |
4002 | ||
4003 | /* The one function handles (most of) the permission flags in the same | |
4004 | way. */ | |
4005 | ||
4006 | static void | |
4007 | set_target_permissions (char *args, int from_tty, | |
4008 | struct cmd_list_element *c) | |
4009 | { | |
4010 | if (target_has_execution) | |
4011 | { | |
4012 | update_target_permissions (); | |
4013 | error (_("Cannot change this setting while the inferior is running.")); | |
4014 | } | |
4015 | ||
4016 | /* Make the real values match the user-changed values. */ | |
4017 | may_write_registers = may_write_registers_1; | |
4018 | may_insert_breakpoints = may_insert_breakpoints_1; | |
4019 | may_insert_tracepoints = may_insert_tracepoints_1; | |
4020 | may_insert_fast_tracepoints = may_insert_fast_tracepoints_1; | |
4021 | may_stop = may_stop_1; | |
4022 | update_observer_mode (); | |
4023 | } | |
4024 | ||
4025 | /* Set memory write permission independently of observer mode. */ | |
4026 | ||
4027 | static void | |
4028 | set_write_memory_permission (char *args, int from_tty, | |
4029 | struct cmd_list_element *c) | |
4030 | { | |
4031 | /* Make the real values match the user-changed values. */ | |
4032 | may_write_memory = may_write_memory_1; | |
4033 | update_observer_mode (); | |
4034 | } | |
4035 | ||
4036 | ||
c906108c | 4037 | void |
fba45db2 | 4038 | initialize_targets (void) |
c906108c SS |
4039 | { |
4040 | init_dummy_target (); | |
4041 | push_target (&dummy_target); | |
4042 | ||
11db9430 SM |
4043 | add_info ("target", info_target_command, targ_desc); |
4044 | add_info ("files", info_target_command, targ_desc); | |
c906108c | 4045 | |
ccce17b0 | 4046 | add_setshow_zuinteger_cmd ("target", class_maintenance, &targetdebug, _("\ |
85c07804 AC |
4047 | Set target debugging."), _("\ |
4048 | Show target debugging."), _("\ | |
333dabeb | 4049 | When non-zero, target debugging is enabled. Higher numbers are more\n\ |
3cecbbbe TT |
4050 | verbose."), |
4051 | set_targetdebug, | |
ccce17b0 YQ |
4052 | show_targetdebug, |
4053 | &setdebuglist, &showdebuglist); | |
3a11626d | 4054 | |
2bc416ba | 4055 | add_setshow_boolean_cmd ("trust-readonly-sections", class_support, |
7915a72c AC |
4056 | &trust_readonly, _("\ |
4057 | Set mode for reading from readonly sections."), _("\ | |
4058 | Show mode for reading from readonly sections."), _("\ | |
3a11626d MS |
4059 | When this mode is on, memory reads from readonly sections (such as .text)\n\ |
4060 | will be read from the object file instead of from the target. This will\n\ | |
7915a72c | 4061 | result in significant performance improvement for remote targets."), |
2c5b56ce | 4062 | NULL, |
920d2a44 | 4063 | show_trust_readonly, |
e707bbc2 | 4064 | &setlist, &showlist); |
96baa820 JM |
4065 | |
4066 | add_com ("monitor", class_obscure, do_monitor_command, | |
1bedd215 | 4067 | _("Send a command to the remote monitor (remote targets only).")); |
96baa820 | 4068 | |
87680a14 JB |
4069 | add_cmd ("target-stack", class_maintenance, maintenance_print_target_stack, |
4070 | _("Print the name of each layer of the internal target stack."), | |
4071 | &maintenanceprintlist); | |
4072 | ||
c6ebd6cf VP |
4073 | add_setshow_boolean_cmd ("target-async", no_class, |
4074 | &target_async_permitted_1, _("\ | |
4075 | Set whether gdb controls the inferior in asynchronous mode."), _("\ | |
4076 | Show whether gdb controls the inferior in asynchronous mode."), _("\ | |
4077 | Tells gdb whether to control the inferior in asynchronous mode."), | |
329ea579 PA |
4078 | maint_set_target_async_command, |
4079 | maint_show_target_async_command, | |
4080 | &maintenance_set_cmdlist, | |
4081 | &maintenance_show_cmdlist); | |
c6ebd6cf | 4082 | |
fbea99ea PA |
4083 | add_setshow_auto_boolean_cmd ("target-non-stop", no_class, |
4084 | &target_non_stop_enabled_1, _("\ | |
4085 | Set whether gdb always controls the inferior in non-stop mode."), _("\ | |
4086 | Show whether gdb always controls the inferior in non-stop mode."), _("\ | |
4087 | Tells gdb whether to control the inferior in non-stop mode."), | |
4088 | maint_set_target_non_stop_command, | |
4089 | maint_show_target_non_stop_command, | |
4090 | &maintenance_set_cmdlist, | |
4091 | &maintenance_show_cmdlist); | |
4092 | ||
d914c394 SS |
4093 | add_setshow_boolean_cmd ("may-write-registers", class_support, |
4094 | &may_write_registers_1, _("\ | |
4095 | Set permission to write into registers."), _("\ | |
4096 | Show permission to write into registers."), _("\ | |
4097 | When this permission is on, GDB may write into the target's registers.\n\ | |
4098 | Otherwise, any sort of write attempt will result in an error."), | |
4099 | set_target_permissions, NULL, | |
4100 | &setlist, &showlist); | |
4101 | ||
4102 | add_setshow_boolean_cmd ("may-write-memory", class_support, | |
4103 | &may_write_memory_1, _("\ | |
4104 | Set permission to write into target memory."), _("\ | |
4105 | Show permission to write into target memory."), _("\ | |
4106 | When this permission is on, GDB may write into the target's memory.\n\ | |
4107 | Otherwise, any sort of write attempt will result in an error."), | |
4108 | set_write_memory_permission, NULL, | |
4109 | &setlist, &showlist); | |
4110 | ||
4111 | add_setshow_boolean_cmd ("may-insert-breakpoints", class_support, | |
4112 | &may_insert_breakpoints_1, _("\ | |
4113 | Set permission to insert breakpoints in the target."), _("\ | |
4114 | Show permission to insert breakpoints in the target."), _("\ | |
4115 | When this permission is on, GDB may insert breakpoints in the program.\n\ | |
4116 | Otherwise, any sort of insertion attempt will result in an error."), | |
4117 | set_target_permissions, NULL, | |
4118 | &setlist, &showlist); | |
4119 | ||
4120 | add_setshow_boolean_cmd ("may-insert-tracepoints", class_support, | |
4121 | &may_insert_tracepoints_1, _("\ | |
4122 | Set permission to insert tracepoints in the target."), _("\ | |
4123 | Show permission to insert tracepoints in the target."), _("\ | |
4124 | When this permission is on, GDB may insert tracepoints in the program.\n\ | |
4125 | Otherwise, any sort of insertion attempt will result in an error."), | |
4126 | set_target_permissions, NULL, | |
4127 | &setlist, &showlist); | |
4128 | ||
4129 | add_setshow_boolean_cmd ("may-insert-fast-tracepoints", class_support, | |
4130 | &may_insert_fast_tracepoints_1, _("\ | |
4131 | Set permission to insert fast tracepoints in the target."), _("\ | |
4132 | Show permission to insert fast tracepoints in the target."), _("\ | |
4133 | When this permission is on, GDB may insert fast tracepoints.\n\ | |
4134 | Otherwise, any sort of insertion attempt will result in an error."), | |
4135 | set_target_permissions, NULL, | |
4136 | &setlist, &showlist); | |
4137 | ||
4138 | add_setshow_boolean_cmd ("may-interrupt", class_support, | |
4139 | &may_stop_1, _("\ | |
4140 | Set permission to interrupt or signal the target."), _("\ | |
4141 | Show permission to interrupt or signal the target."), _("\ | |
4142 | When this permission is on, GDB may interrupt/stop the target's execution.\n\ | |
4143 | Otherwise, any attempt to interrupt or stop will be ignored."), | |
4144 | set_target_permissions, NULL, | |
4145 | &setlist, &showlist); | |
6a3cb8e8 | 4146 | |
78cbbba8 LM |
4147 | add_com ("flash-erase", no_class, flash_erase_command, |
4148 | _("Erase all flash memory regions.")); | |
4149 | ||
6a3cb8e8 PA |
4150 | add_setshow_boolean_cmd ("auto-connect-native-target", class_support, |
4151 | &auto_connect_native_target, _("\ | |
4152 | Set whether GDB may automatically connect to the native target."), _("\ | |
4153 | Show whether GDB may automatically connect to the native target."), _("\ | |
4154 | When on, and GDB is not connected to a target yet, GDB\n\ | |
4155 | attempts \"run\" and other commands with the native target."), | |
4156 | NULL, show_auto_connect_native_target, | |
4157 | &setlist, &showlist); | |
c906108c | 4158 | } |