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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, |
8dedea02 | 1633 | VEC(memory_read_result_s) **result) |
d5086790 | 1634 | { |
224c3ddb | 1635 | gdb_byte *buf = (gdb_byte *) xmalloc (end - begin); |
8dedea02 VP |
1636 | ULONGEST current_begin = begin; |
1637 | ULONGEST current_end = end; | |
1638 | int forward; | |
1639 | memory_read_result_s r; | |
9b409511 | 1640 | ULONGEST xfered_len; |
8dedea02 VP |
1641 | |
1642 | /* If we previously failed to read 1 byte, nothing can be done here. */ | |
1643 | if (end - begin <= 1) | |
13b3fd9b MS |
1644 | { |
1645 | xfree (buf); | |
1646 | return; | |
1647 | } | |
8dedea02 VP |
1648 | |
1649 | /* Check that either first or the last byte is readable, and give up | |
c378eb4e | 1650 | if not. This heuristic is meant to permit reading accessible memory |
8dedea02 VP |
1651 | at the boundary of accessible region. */ |
1652 | if (target_read_partial (ops, TARGET_OBJECT_MEMORY, NULL, | |
9b409511 | 1653 | buf, begin, 1, &xfered_len) == TARGET_XFER_OK) |
8dedea02 VP |
1654 | { |
1655 | forward = 1; | |
1656 | ++current_begin; | |
1657 | } | |
1658 | else if (target_read_partial (ops, TARGET_OBJECT_MEMORY, NULL, | |
279a6fed | 1659 | buf + (end - begin) - 1, end - 1, 1, |
9b409511 | 1660 | &xfered_len) == TARGET_XFER_OK) |
8dedea02 VP |
1661 | { |
1662 | forward = 0; | |
1663 | --current_end; | |
1664 | } | |
1665 | else | |
1666 | { | |
13b3fd9b | 1667 | xfree (buf); |
8dedea02 VP |
1668 | return; |
1669 | } | |
1670 | ||
1671 | /* Loop invariant is that the [current_begin, current_end) was previously | |
1672 | found to be not readable as a whole. | |
1673 | ||
1674 | Note loop condition -- if the range has 1 byte, we can't divide the range | |
1675 | so there's no point trying further. */ | |
1676 | while (current_end - current_begin > 1) | |
1677 | { | |
1678 | ULONGEST first_half_begin, first_half_end; | |
1679 | ULONGEST second_half_begin, second_half_end; | |
1680 | LONGEST xfer; | |
279a6fed | 1681 | ULONGEST middle = current_begin + (current_end - current_begin) / 2; |
f1a507a1 | 1682 | |
8dedea02 VP |
1683 | if (forward) |
1684 | { | |
1685 | first_half_begin = current_begin; | |
1686 | first_half_end = middle; | |
1687 | second_half_begin = middle; | |
1688 | second_half_end = current_end; | |
1689 | } | |
1690 | else | |
1691 | { | |
1692 | first_half_begin = middle; | |
1693 | first_half_end = current_end; | |
1694 | second_half_begin = current_begin; | |
1695 | second_half_end = middle; | |
1696 | } | |
1697 | ||
1698 | xfer = target_read (ops, TARGET_OBJECT_MEMORY, NULL, | |
d309493c | 1699 | buf + (first_half_begin - begin) * unit_size, |
8dedea02 VP |
1700 | first_half_begin, |
1701 | first_half_end - first_half_begin); | |
1702 | ||
1703 | if (xfer == first_half_end - first_half_begin) | |
1704 | { | |
c378eb4e | 1705 | /* This half reads up fine. So, the error must be in the |
3e43a32a | 1706 | other half. */ |
8dedea02 VP |
1707 | current_begin = second_half_begin; |
1708 | current_end = second_half_end; | |
1709 | } | |
1710 | else | |
1711 | { | |
c378eb4e | 1712 | /* This half is not readable. Because we've tried one byte, we |
279a6fed | 1713 | know some part of this half if actually readable. Go to the next |
8dedea02 VP |
1714 | iteration to divide again and try to read. |
1715 | ||
1716 | We don't handle the other half, because this function only tries | |
1717 | to read a single readable subrange. */ | |
1718 | current_begin = first_half_begin; | |
1719 | current_end = first_half_end; | |
1720 | } | |
1721 | } | |
1722 | ||
1723 | if (forward) | |
1724 | { | |
1725 | /* The [begin, current_begin) range has been read. */ | |
1726 | r.begin = begin; | |
1727 | r.end = current_begin; | |
1728 | r.data = buf; | |
1729 | } | |
1730 | else | |
1731 | { | |
1732 | /* The [current_end, end) range has been read. */ | |
279a6fed | 1733 | LONGEST region_len = end - current_end; |
f1a507a1 | 1734 | |
224c3ddb | 1735 | r.data = (gdb_byte *) xmalloc (region_len * unit_size); |
d309493c SM |
1736 | memcpy (r.data, buf + (current_end - begin) * unit_size, |
1737 | region_len * unit_size); | |
8dedea02 VP |
1738 | r.begin = current_end; |
1739 | r.end = end; | |
1740 | xfree (buf); | |
1741 | } | |
1742 | VEC_safe_push(memory_read_result_s, (*result), &r); | |
1743 | } | |
1744 | ||
1745 | void | |
1746 | free_memory_read_result_vector (void *x) | |
1747 | { | |
9d78f827 | 1748 | VEC(memory_read_result_s) **v = (VEC(memory_read_result_s) **) x; |
8dedea02 VP |
1749 | memory_read_result_s *current; |
1750 | int ix; | |
1751 | ||
9d78f827 | 1752 | for (ix = 0; VEC_iterate (memory_read_result_s, *v, ix, current); ++ix) |
8dedea02 VP |
1753 | { |
1754 | xfree (current->data); | |
1755 | } | |
9d78f827 | 1756 | VEC_free (memory_read_result_s, *v); |
8dedea02 VP |
1757 | } |
1758 | ||
1759 | VEC(memory_read_result_s) * | |
279a6fed SM |
1760 | read_memory_robust (struct target_ops *ops, |
1761 | const ULONGEST offset, const LONGEST len) | |
8dedea02 VP |
1762 | { |
1763 | VEC(memory_read_result_s) *result = 0; | |
d309493c | 1764 | int unit_size = gdbarch_addressable_memory_unit_size (target_gdbarch ()); |
9d78f827 TT |
1765 | struct cleanup *cleanup = make_cleanup (free_memory_read_result_vector, |
1766 | &result); | |
8dedea02 | 1767 | |
279a6fed SM |
1768 | LONGEST xfered_total = 0; |
1769 | while (xfered_total < len) | |
d5086790 | 1770 | { |
279a6fed SM |
1771 | struct mem_region *region = lookup_mem_region (offset + xfered_total); |
1772 | LONGEST region_len; | |
5d502164 | 1773 | |
8dedea02 VP |
1774 | /* If there is no explicit region, a fake one should be created. */ |
1775 | gdb_assert (region); | |
1776 | ||
1777 | if (region->hi == 0) | |
279a6fed | 1778 | region_len = len - xfered_total; |
8dedea02 | 1779 | else |
279a6fed | 1780 | region_len = region->hi - offset; |
8dedea02 VP |
1781 | |
1782 | if (region->attrib.mode == MEM_NONE || region->attrib.mode == MEM_WO) | |
d5086790 | 1783 | { |
c378eb4e | 1784 | /* Cannot read this region. Note that we can end up here only |
8dedea02 VP |
1785 | if the region is explicitly marked inaccessible, or |
1786 | 'inaccessible-by-default' is in effect. */ | |
279a6fed | 1787 | xfered_total += region_len; |
8dedea02 VP |
1788 | } |
1789 | else | |
1790 | { | |
325fac50 | 1791 | LONGEST to_read = std::min (len - xfered_total, region_len); |
d309493c | 1792 | gdb_byte *buffer = (gdb_byte *) xmalloc (to_read * unit_size); |
9d78f827 | 1793 | struct cleanup *inner_cleanup = make_cleanup (xfree, buffer); |
8dedea02 | 1794 | |
279a6fed SM |
1795 | LONGEST xfered_partial = |
1796 | target_read (ops, TARGET_OBJECT_MEMORY, NULL, | |
1797 | (gdb_byte *) buffer, | |
1798 | offset + xfered_total, to_read); | |
8dedea02 | 1799 | /* Call an observer, notifying them of the xfer progress? */ |
279a6fed | 1800 | if (xfered_partial <= 0) |
d5086790 | 1801 | { |
c378eb4e | 1802 | /* Got an error reading full chunk. See if maybe we can read |
8dedea02 | 1803 | some subrange. */ |
9d78f827 | 1804 | do_cleanups (inner_cleanup); |
e084c964 DB |
1805 | read_whatever_is_readable (ops, offset + xfered_total, |
1806 | offset + xfered_total + to_read, | |
1807 | unit_size, &result); | |
279a6fed | 1808 | xfered_total += to_read; |
d5086790 | 1809 | } |
8dedea02 VP |
1810 | else |
1811 | { | |
1812 | struct memory_read_result r; | |
9d78f827 TT |
1813 | |
1814 | discard_cleanups (inner_cleanup); | |
8dedea02 | 1815 | r.data = buffer; |
279a6fed SM |
1816 | r.begin = offset + xfered_total; |
1817 | r.end = r.begin + xfered_partial; | |
8dedea02 | 1818 | VEC_safe_push (memory_read_result_s, result, &r); |
279a6fed | 1819 | xfered_total += xfered_partial; |
8dedea02 VP |
1820 | } |
1821 | QUIT; | |
d5086790 | 1822 | } |
d5086790 | 1823 | } |
9d78f827 TT |
1824 | |
1825 | discard_cleanups (cleanup); | |
8dedea02 | 1826 | return result; |
d5086790 VP |
1827 | } |
1828 | ||
8dedea02 | 1829 | |
cf7a04e8 DJ |
1830 | /* An alternative to target_write with progress callbacks. */ |
1831 | ||
1e3ff5ad | 1832 | LONGEST |
cf7a04e8 DJ |
1833 | target_write_with_progress (struct target_ops *ops, |
1834 | enum target_object object, | |
1835 | const char *annex, const gdb_byte *buf, | |
1836 | ULONGEST offset, LONGEST len, | |
1837 | void (*progress) (ULONGEST, void *), void *baton) | |
1e3ff5ad | 1838 | { |
279a6fed | 1839 | LONGEST xfered_total = 0; |
d309493c SM |
1840 | int unit_size = 1; |
1841 | ||
1842 | /* If we are writing to a memory object, find the length of an addressable | |
1843 | unit for that architecture. */ | |
1844 | if (object == TARGET_OBJECT_MEMORY | |
1845 | || object == TARGET_OBJECT_STACK_MEMORY | |
1846 | || object == TARGET_OBJECT_CODE_MEMORY | |
1847 | || object == TARGET_OBJECT_RAW_MEMORY) | |
1848 | unit_size = gdbarch_addressable_memory_unit_size (target_gdbarch ()); | |
a76d924d DJ |
1849 | |
1850 | /* Give the progress callback a chance to set up. */ | |
1851 | if (progress) | |
1852 | (*progress) (0, baton); | |
1853 | ||
279a6fed | 1854 | while (xfered_total < len) |
1e3ff5ad | 1855 | { |
279a6fed | 1856 | ULONGEST xfered_partial; |
9b409511 YQ |
1857 | enum target_xfer_status status; |
1858 | ||
1859 | status = target_write_partial (ops, object, annex, | |
d309493c | 1860 | buf + xfered_total * unit_size, |
279a6fed SM |
1861 | offset + xfered_total, len - xfered_total, |
1862 | &xfered_partial); | |
cf7a04e8 | 1863 | |
5c328c05 | 1864 | if (status != TARGET_XFER_OK) |
279a6fed | 1865 | return status == TARGET_XFER_EOF ? xfered_total : TARGET_XFER_E_IO; |
cf7a04e8 DJ |
1866 | |
1867 | if (progress) | |
279a6fed | 1868 | (*progress) (xfered_partial, baton); |
cf7a04e8 | 1869 | |
279a6fed | 1870 | xfered_total += xfered_partial; |
1e3ff5ad AC |
1871 | QUIT; |
1872 | } | |
1873 | return len; | |
1874 | } | |
1875 | ||
7f79c47e DE |
1876 | /* For docs on target_write see target.h. */ |
1877 | ||
cf7a04e8 DJ |
1878 | LONGEST |
1879 | target_write (struct target_ops *ops, | |
1880 | enum target_object object, | |
1881 | const char *annex, const gdb_byte *buf, | |
1882 | ULONGEST offset, LONGEST len) | |
1883 | { | |
1884 | return target_write_with_progress (ops, object, annex, buf, offset, len, | |
1885 | NULL, NULL); | |
1886 | } | |
1887 | ||
159f81f3 DJ |
1888 | /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return |
1889 | the size of the transferred data. PADDING additional bytes are | |
1890 | available in *BUF_P. This is a helper function for | |
1891 | target_read_alloc; see the declaration of that function for more | |
1892 | information. */ | |
13547ab6 | 1893 | |
159f81f3 DJ |
1894 | static LONGEST |
1895 | target_read_alloc_1 (struct target_ops *ops, enum target_object object, | |
1896 | const char *annex, gdb_byte **buf_p, int padding) | |
13547ab6 DJ |
1897 | { |
1898 | size_t buf_alloc, buf_pos; | |
1899 | gdb_byte *buf; | |
13547ab6 DJ |
1900 | |
1901 | /* This function does not have a length parameter; it reads the | |
1902 | entire OBJECT). Also, it doesn't support objects fetched partly | |
1903 | from one target and partly from another (in a different stratum, | |
1904 | e.g. a core file and an executable). Both reasons make it | |
1905 | unsuitable for reading memory. */ | |
1906 | gdb_assert (object != TARGET_OBJECT_MEMORY); | |
1907 | ||
1908 | /* Start by reading up to 4K at a time. The target will throttle | |
1909 | this number down if necessary. */ | |
1910 | buf_alloc = 4096; | |
224c3ddb | 1911 | buf = (gdb_byte *) xmalloc (buf_alloc); |
13547ab6 DJ |
1912 | buf_pos = 0; |
1913 | while (1) | |
1914 | { | |
9b409511 YQ |
1915 | ULONGEST xfered_len; |
1916 | enum target_xfer_status status; | |
1917 | ||
1918 | status = target_read_partial (ops, object, annex, &buf[buf_pos], | |
1919 | buf_pos, buf_alloc - buf_pos - padding, | |
1920 | &xfered_len); | |
1921 | ||
1922 | if (status == TARGET_XFER_EOF) | |
13547ab6 DJ |
1923 | { |
1924 | /* Read all there was. */ | |
1925 | if (buf_pos == 0) | |
1926 | xfree (buf); | |
1927 | else | |
1928 | *buf_p = buf; | |
1929 | return buf_pos; | |
1930 | } | |
9b409511 YQ |
1931 | else if (status != TARGET_XFER_OK) |
1932 | { | |
1933 | /* An error occurred. */ | |
1934 | xfree (buf); | |
1935 | return TARGET_XFER_E_IO; | |
1936 | } | |
13547ab6 | 1937 | |
9b409511 | 1938 | buf_pos += xfered_len; |
13547ab6 DJ |
1939 | |
1940 | /* If the buffer is filling up, expand it. */ | |
1941 | if (buf_alloc < buf_pos * 2) | |
1942 | { | |
1943 | buf_alloc *= 2; | |
224c3ddb | 1944 | buf = (gdb_byte *) xrealloc (buf, buf_alloc); |
13547ab6 DJ |
1945 | } |
1946 | ||
1947 | QUIT; | |
1948 | } | |
1949 | } | |
1950 | ||
159f81f3 DJ |
1951 | /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return |
1952 | the size of the transferred data. See the declaration in "target.h" | |
1953 | function for more information about the return value. */ | |
1954 | ||
1955 | LONGEST | |
1956 | target_read_alloc (struct target_ops *ops, enum target_object object, | |
1957 | const char *annex, gdb_byte **buf_p) | |
1958 | { | |
1959 | return target_read_alloc_1 (ops, object, annex, buf_p, 0); | |
1960 | } | |
1961 | ||
1962 | /* Read OBJECT/ANNEX using OPS. The result is NUL-terminated and | |
1963 | returned as a string, allocated using xmalloc. If an error occurs | |
1964 | or the transfer is unsupported, NULL is returned. Empty objects | |
1965 | are returned as allocated but empty strings. A warning is issued | |
1966 | if the result contains any embedded NUL bytes. */ | |
1967 | ||
1968 | char * | |
1969 | target_read_stralloc (struct target_ops *ops, enum target_object object, | |
1970 | const char *annex) | |
1971 | { | |
39086a0e PA |
1972 | gdb_byte *buffer; |
1973 | char *bufstr; | |
7313baad | 1974 | LONGEST i, transferred; |
159f81f3 | 1975 | |
39086a0e PA |
1976 | transferred = target_read_alloc_1 (ops, object, annex, &buffer, 1); |
1977 | bufstr = (char *) buffer; | |
159f81f3 DJ |
1978 | |
1979 | if (transferred < 0) | |
1980 | return NULL; | |
1981 | ||
1982 | if (transferred == 0) | |
1983 | return xstrdup (""); | |
1984 | ||
39086a0e | 1985 | bufstr[transferred] = 0; |
7313baad UW |
1986 | |
1987 | /* Check for embedded NUL bytes; but allow trailing NULs. */ | |
39086a0e PA |
1988 | for (i = strlen (bufstr); i < transferred; i++) |
1989 | if (bufstr[i] != 0) | |
7313baad UW |
1990 | { |
1991 | warning (_("target object %d, annex %s, " | |
1992 | "contained unexpected null characters"), | |
1993 | (int) object, annex ? annex : "(none)"); | |
1994 | break; | |
1995 | } | |
159f81f3 | 1996 | |
39086a0e | 1997 | return bufstr; |
159f81f3 DJ |
1998 | } |
1999 | ||
b6591e8b AC |
2000 | /* Memory transfer methods. */ |
2001 | ||
2002 | void | |
1b0ba102 | 2003 | get_target_memory (struct target_ops *ops, CORE_ADDR addr, gdb_byte *buf, |
b6591e8b AC |
2004 | LONGEST len) |
2005 | { | |
07b82ea5 PA |
2006 | /* This method is used to read from an alternate, non-current |
2007 | target. This read must bypass the overlay support (as symbols | |
2008 | don't match this target), and GDB's internal cache (wrong cache | |
2009 | for this target). */ | |
2010 | if (target_read (ops, TARGET_OBJECT_RAW_MEMORY, NULL, buf, addr, len) | |
b6591e8b | 2011 | != len) |
578d3588 | 2012 | memory_error (TARGET_XFER_E_IO, addr); |
b6591e8b AC |
2013 | } |
2014 | ||
2015 | ULONGEST | |
5d502164 MS |
2016 | get_target_memory_unsigned (struct target_ops *ops, CORE_ADDR addr, |
2017 | int len, enum bfd_endian byte_order) | |
b6591e8b | 2018 | { |
f6519ebc | 2019 | gdb_byte buf[sizeof (ULONGEST)]; |
b6591e8b AC |
2020 | |
2021 | gdb_assert (len <= sizeof (buf)); | |
2022 | get_target_memory (ops, addr, buf, len); | |
e17a4113 | 2023 | return extract_unsigned_integer (buf, len, byte_order); |
b6591e8b AC |
2024 | } |
2025 | ||
3db08215 MM |
2026 | /* See target.h. */ |
2027 | ||
d914c394 SS |
2028 | int |
2029 | target_insert_breakpoint (struct gdbarch *gdbarch, | |
2030 | struct bp_target_info *bp_tgt) | |
2031 | { | |
2032 | if (!may_insert_breakpoints) | |
2033 | { | |
2034 | warning (_("May not insert breakpoints")); | |
2035 | return 1; | |
2036 | } | |
2037 | ||
6b84065d TT |
2038 | return current_target.to_insert_breakpoint (¤t_target, |
2039 | gdbarch, bp_tgt); | |
d914c394 SS |
2040 | } |
2041 | ||
3db08215 MM |
2042 | /* See target.h. */ |
2043 | ||
d914c394 | 2044 | int |
6b84065d | 2045 | target_remove_breakpoint (struct gdbarch *gdbarch, |
73971819 PA |
2046 | struct bp_target_info *bp_tgt, |
2047 | enum remove_bp_reason reason) | |
d914c394 SS |
2048 | { |
2049 | /* This is kind of a weird case to handle, but the permission might | |
2050 | have been changed after breakpoints were inserted - in which case | |
2051 | we should just take the user literally and assume that any | |
2052 | breakpoints should be left in place. */ | |
2053 | if (!may_insert_breakpoints) | |
2054 | { | |
2055 | warning (_("May not remove breakpoints")); | |
2056 | return 1; | |
2057 | } | |
2058 | ||
6b84065d | 2059 | return current_target.to_remove_breakpoint (¤t_target, |
73971819 | 2060 | gdbarch, bp_tgt, reason); |
d914c394 SS |
2061 | } |
2062 | ||
c906108c | 2063 | static void |
11db9430 | 2064 | info_target_command (char *args, int from_tty) |
c906108c SS |
2065 | { |
2066 | struct target_ops *t; | |
c906108c | 2067 | int has_all_mem = 0; |
c5aa993b | 2068 | |
c906108c | 2069 | if (symfile_objfile != NULL) |
4262abfb JK |
2070 | printf_unfiltered (_("Symbols from \"%s\".\n"), |
2071 | objfile_name (symfile_objfile)); | |
c906108c | 2072 | |
258b763a | 2073 | for (t = target_stack; t != NULL; t = t->beneath) |
c906108c | 2074 | { |
c35b1492 | 2075 | if (!(*t->to_has_memory) (t)) |
c906108c SS |
2076 | continue; |
2077 | ||
c5aa993b | 2078 | if ((int) (t->to_stratum) <= (int) dummy_stratum) |
c906108c SS |
2079 | continue; |
2080 | if (has_all_mem) | |
3e43a32a MS |
2081 | printf_unfiltered (_("\tWhile running this, " |
2082 | "GDB does not access memory from...\n")); | |
c5aa993b JM |
2083 | printf_unfiltered ("%s:\n", t->to_longname); |
2084 | (t->to_files_info) (t); | |
c35b1492 | 2085 | has_all_mem = (*t->to_has_all_memory) (t); |
c906108c SS |
2086 | } |
2087 | } | |
2088 | ||
fd79ecee DJ |
2089 | /* This function is called before any new inferior is created, e.g. |
2090 | by running a program, attaching, or connecting to a target. | |
2091 | It cleans up any state from previous invocations which might | |
2092 | change between runs. This is a subset of what target_preopen | |
2093 | resets (things which might change between targets). */ | |
2094 | ||
2095 | void | |
2096 | target_pre_inferior (int from_tty) | |
2097 | { | |
c378eb4e | 2098 | /* Clear out solib state. Otherwise the solib state of the previous |
b9db4ced | 2099 | inferior might have survived and is entirely wrong for the new |
c378eb4e | 2100 | target. This has been observed on GNU/Linux using glibc 2.3. How |
b9db4ced UW |
2101 | to reproduce: |
2102 | ||
2103 | bash$ ./foo& | |
2104 | [1] 4711 | |
2105 | bash$ ./foo& | |
2106 | [1] 4712 | |
2107 | bash$ gdb ./foo | |
2108 | [...] | |
2109 | (gdb) attach 4711 | |
2110 | (gdb) detach | |
2111 | (gdb) attach 4712 | |
2112 | Cannot access memory at address 0xdeadbeef | |
2113 | */ | |
b9db4ced | 2114 | |
50c71eaf PA |
2115 | /* In some OSs, the shared library list is the same/global/shared |
2116 | across inferiors. If code is shared between processes, so are | |
2117 | memory regions and features. */ | |
f5656ead | 2118 | if (!gdbarch_has_global_solist (target_gdbarch ())) |
50c71eaf PA |
2119 | { |
2120 | no_shared_libraries (NULL, from_tty); | |
2121 | ||
2122 | invalidate_target_mem_regions (); | |
424163ea | 2123 | |
50c71eaf PA |
2124 | target_clear_description (); |
2125 | } | |
8ffcbaaf | 2126 | |
e9756d52 PP |
2127 | /* attach_flag may be set if the previous process associated with |
2128 | the inferior was attached to. */ | |
2129 | current_inferior ()->attach_flag = 0; | |
2130 | ||
5d5658a1 PA |
2131 | current_inferior ()->highest_thread_num = 0; |
2132 | ||
8ffcbaaf | 2133 | agent_capability_invalidate (); |
fd79ecee DJ |
2134 | } |
2135 | ||
b8fa0bfa PA |
2136 | /* Callback for iterate_over_inferiors. Gets rid of the given |
2137 | inferior. */ | |
2138 | ||
2139 | static int | |
2140 | dispose_inferior (struct inferior *inf, void *args) | |
2141 | { | |
2142 | struct thread_info *thread; | |
2143 | ||
2144 | thread = any_thread_of_process (inf->pid); | |
2145 | if (thread) | |
2146 | { | |
2147 | switch_to_thread (thread->ptid); | |
2148 | ||
2149 | /* Core inferiors actually should be detached, not killed. */ | |
2150 | if (target_has_execution) | |
2151 | target_kill (); | |
2152 | else | |
2153 | target_detach (NULL, 0); | |
2154 | } | |
2155 | ||
2156 | return 0; | |
2157 | } | |
2158 | ||
c906108c SS |
2159 | /* This is to be called by the open routine before it does |
2160 | anything. */ | |
2161 | ||
2162 | void | |
fba45db2 | 2163 | target_preopen (int from_tty) |
c906108c | 2164 | { |
c5aa993b | 2165 | dont_repeat (); |
c906108c | 2166 | |
b8fa0bfa | 2167 | if (have_inferiors ()) |
c5aa993b | 2168 | { |
adf40b2e | 2169 | if (!from_tty |
b8fa0bfa PA |
2170 | || !have_live_inferiors () |
2171 | || query (_("A program is being debugged already. Kill it? "))) | |
2172 | iterate_over_inferiors (dispose_inferior, NULL); | |
c906108c | 2173 | else |
8a3fe4f8 | 2174 | error (_("Program not killed.")); |
c906108c SS |
2175 | } |
2176 | ||
2177 | /* Calling target_kill may remove the target from the stack. But if | |
2178 | it doesn't (which seems like a win for UDI), remove it now. */ | |
87ab71f0 PA |
2179 | /* Leave the exec target, though. The user may be switching from a |
2180 | live process to a core of the same program. */ | |
460014f5 | 2181 | pop_all_targets_above (file_stratum); |
fd79ecee DJ |
2182 | |
2183 | target_pre_inferior (from_tty); | |
c906108c SS |
2184 | } |
2185 | ||
2186 | /* Detach a target after doing deferred register stores. */ | |
2187 | ||
2188 | void | |
52554a0e | 2189 | target_detach (const char *args, int from_tty) |
c906108c | 2190 | { |
f5656ead | 2191 | if (gdbarch_has_global_breakpoints (target_gdbarch ())) |
50c71eaf PA |
2192 | /* Don't remove global breakpoints here. They're removed on |
2193 | disconnection from the target. */ | |
2194 | ; | |
2195 | else | |
2196 | /* If we're in breakpoints-always-inserted mode, have to remove | |
2197 | them before detaching. */ | |
dfd4cc63 | 2198 | remove_breakpoints_pid (ptid_get_pid (inferior_ptid)); |
74960c60 | 2199 | |
24291992 PA |
2200 | prepare_for_detach (); |
2201 | ||
09da0d0a | 2202 | current_target.to_detach (¤t_target, args, from_tty); |
c906108c SS |
2203 | } |
2204 | ||
6ad8ae5c | 2205 | void |
fee354ee | 2206 | target_disconnect (const char *args, int from_tty) |
6ad8ae5c | 2207 | { |
50c71eaf PA |
2208 | /* If we're in breakpoints-always-inserted mode or if breakpoints |
2209 | are global across processes, we have to remove them before | |
2210 | disconnecting. */ | |
74960c60 VP |
2211 | remove_breakpoints (); |
2212 | ||
86a0854a | 2213 | current_target.to_disconnect (¤t_target, args, from_tty); |
6ad8ae5c DJ |
2214 | } |
2215 | ||
f2b9e3df SDJ |
2216 | /* See target/target.h. */ |
2217 | ||
117de6a9 | 2218 | ptid_t |
47608cb1 | 2219 | target_wait (ptid_t ptid, struct target_waitstatus *status, int options) |
117de6a9 | 2220 | { |
a7068b60 | 2221 | return (current_target.to_wait) (¤t_target, ptid, status, options); |
117de6a9 PA |
2222 | } |
2223 | ||
0b333c5e PA |
2224 | /* See target.h. */ |
2225 | ||
2226 | ptid_t | |
2227 | default_target_wait (struct target_ops *ops, | |
2228 | ptid_t ptid, struct target_waitstatus *status, | |
2229 | int options) | |
2230 | { | |
2231 | status->kind = TARGET_WAITKIND_IGNORE; | |
2232 | return minus_one_ptid; | |
2233 | } | |
2234 | ||
7a114964 | 2235 | const char * |
117de6a9 PA |
2236 | target_pid_to_str (ptid_t ptid) |
2237 | { | |
770234d3 | 2238 | return (*current_target.to_pid_to_str) (¤t_target, ptid); |
117de6a9 PA |
2239 | } |
2240 | ||
73ede765 | 2241 | const char * |
4694da01 TT |
2242 | target_thread_name (struct thread_info *info) |
2243 | { | |
825828fc | 2244 | return current_target.to_thread_name (¤t_target, info); |
4694da01 TT |
2245 | } |
2246 | ||
e04ee09e KB |
2247 | struct thread_info * |
2248 | target_thread_handle_to_thread_info (const gdb_byte *thread_handle, | |
2249 | int handle_len, | |
2250 | struct inferior *inf) | |
2251 | { | |
2252 | return current_target.to_thread_handle_to_thread_info | |
2253 | (¤t_target, thread_handle, handle_len, inf); | |
2254 | } | |
2255 | ||
e1ac3328 | 2256 | void |
2ea28649 | 2257 | target_resume (ptid_t ptid, int step, enum gdb_signal signal) |
e1ac3328 | 2258 | { |
4e5d721f | 2259 | target_dcache_invalidate (); |
28439f5e | 2260 | |
6b84065d | 2261 | current_target.to_resume (¤t_target, ptid, step, signal); |
28439f5e | 2262 | |
6b84065d | 2263 | registers_changed_ptid (ptid); |
251bde03 PA |
2264 | /* We only set the internal executing state here. The user/frontend |
2265 | running state is set at a higher level. */ | |
6b84065d | 2266 | set_executing (ptid, 1); |
6b84065d | 2267 | clear_inline_frame_state (ptid); |
e1ac3328 | 2268 | } |
2455069d | 2269 | |
85ad3aaf PA |
2270 | /* If true, target_commit_resume is a nop. */ |
2271 | static int defer_target_commit_resume; | |
2272 | ||
2273 | /* See target.h. */ | |
2274 | ||
2275 | void | |
2276 | target_commit_resume (void) | |
2277 | { | |
2278 | struct target_ops *t; | |
2279 | ||
2280 | if (defer_target_commit_resume) | |
2281 | return; | |
2282 | ||
2283 | current_target.to_commit_resume (¤t_target); | |
2284 | } | |
2285 | ||
2286 | /* See target.h. */ | |
2287 | ||
2288 | struct cleanup * | |
2289 | make_cleanup_defer_target_commit_resume (void) | |
2290 | { | |
2291 | struct cleanup *old_chain; | |
2292 | ||
2293 | old_chain = make_cleanup_restore_integer (&defer_target_commit_resume); | |
2294 | defer_target_commit_resume = 1; | |
2295 | return old_chain; | |
2296 | } | |
2297 | ||
2455069d UW |
2298 | void |
2299 | target_pass_signals (int numsigs, unsigned char *pass_signals) | |
2300 | { | |
035cad7f | 2301 | (*current_target.to_pass_signals) (¤t_target, numsigs, pass_signals); |
2455069d UW |
2302 | } |
2303 | ||
9b224c5e PA |
2304 | void |
2305 | target_program_signals (int numsigs, unsigned char *program_signals) | |
2306 | { | |
7d4f8efa TT |
2307 | (*current_target.to_program_signals) (¤t_target, |
2308 | numsigs, program_signals); | |
9b224c5e PA |
2309 | } |
2310 | ||
098dba18 TT |
2311 | static int |
2312 | default_follow_fork (struct target_ops *self, int follow_child, | |
2313 | int detach_fork) | |
2314 | { | |
2315 | /* Some target returned a fork event, but did not know how to follow it. */ | |
2316 | internal_error (__FILE__, __LINE__, | |
2317 | _("could not find a target to follow fork")); | |
2318 | } | |
2319 | ||
ee057212 DJ |
2320 | /* Look through the list of possible targets for a target that can |
2321 | follow forks. */ | |
2322 | ||
2323 | int | |
07107ca6 | 2324 | target_follow_fork (int follow_child, int detach_fork) |
ee057212 | 2325 | { |
a7068b60 TT |
2326 | return current_target.to_follow_fork (¤t_target, |
2327 | follow_child, detach_fork); | |
ee057212 DJ |
2328 | } |
2329 | ||
94585166 DB |
2330 | /* Target wrapper for follow exec hook. */ |
2331 | ||
2332 | void | |
2333 | target_follow_exec (struct inferior *inf, char *execd_pathname) | |
2334 | { | |
2335 | current_target.to_follow_exec (¤t_target, inf, execd_pathname); | |
2336 | } | |
2337 | ||
8d657035 TT |
2338 | static void |
2339 | default_mourn_inferior (struct target_ops *self) | |
2340 | { | |
2341 | internal_error (__FILE__, __LINE__, | |
2342 | _("could not find a target to follow mourn inferior")); | |
2343 | } | |
2344 | ||
136d6dae | 2345 | void |
bc1e6c81 | 2346 | target_mourn_inferior (ptid_t ptid) |
136d6dae | 2347 | { |
bc1e6c81 | 2348 | gdb_assert (ptid_equal (ptid, inferior_ptid)); |
8d657035 | 2349 | current_target.to_mourn_inferior (¤t_target); |
136d6dae | 2350 | |
8d657035 TT |
2351 | /* We no longer need to keep handles on any of the object files. |
2352 | Make sure to release them to avoid unnecessarily locking any | |
2353 | of them while we're not actually debugging. */ | |
2354 | bfd_cache_close_all (); | |
136d6dae VP |
2355 | } |
2356 | ||
424163ea DJ |
2357 | /* Look for a target which can describe architectural features, starting |
2358 | from TARGET. If we find one, return its description. */ | |
2359 | ||
2360 | const struct target_desc * | |
2361 | target_read_description (struct target_ops *target) | |
2362 | { | |
2117c711 | 2363 | return target->to_read_description (target); |
424163ea DJ |
2364 | } |
2365 | ||
58a5184e | 2366 | /* This implements a basic search of memory, reading target memory and |
08388c79 DE |
2367 | performing the search here (as opposed to performing the search in on the |
2368 | target side with, for example, gdbserver). */ | |
2369 | ||
2370 | int | |
2371 | simple_search_memory (struct target_ops *ops, | |
2372 | CORE_ADDR start_addr, ULONGEST search_space_len, | |
2373 | const gdb_byte *pattern, ULONGEST pattern_len, | |
2374 | CORE_ADDR *found_addrp) | |
2375 | { | |
2376 | /* NOTE: also defined in find.c testcase. */ | |
2377 | #define SEARCH_CHUNK_SIZE 16000 | |
2378 | const unsigned chunk_size = SEARCH_CHUNK_SIZE; | |
2379 | /* Buffer to hold memory contents for searching. */ | |
08388c79 | 2380 | unsigned search_buf_size; |
08388c79 DE |
2381 | |
2382 | search_buf_size = chunk_size + pattern_len - 1; | |
2383 | ||
2384 | /* No point in trying to allocate a buffer larger than the search space. */ | |
2385 | if (search_space_len < search_buf_size) | |
2386 | search_buf_size = search_space_len; | |
2387 | ||
26fcd5d7 | 2388 | gdb::byte_vector search_buf (search_buf_size); |
08388c79 DE |
2389 | |
2390 | /* Prime the search buffer. */ | |
2391 | ||
2392 | if (target_read (ops, TARGET_OBJECT_MEMORY, NULL, | |
26fcd5d7 TT |
2393 | search_buf.data (), start_addr, search_buf_size) |
2394 | != search_buf_size) | |
08388c79 | 2395 | { |
b3dc46ff AB |
2396 | warning (_("Unable to access %s bytes of target " |
2397 | "memory at %s, halting search."), | |
2398 | pulongest (search_buf_size), hex_string (start_addr)); | |
08388c79 DE |
2399 | return -1; |
2400 | } | |
2401 | ||
2402 | /* Perform the search. | |
2403 | ||
2404 | The loop is kept simple by allocating [N + pattern-length - 1] bytes. | |
2405 | When we've scanned N bytes we copy the trailing bytes to the start and | |
2406 | read in another N bytes. */ | |
2407 | ||
2408 | while (search_space_len >= pattern_len) | |
2409 | { | |
2410 | gdb_byte *found_ptr; | |
325fac50 PA |
2411 | unsigned nr_search_bytes |
2412 | = std::min (search_space_len, (ULONGEST) search_buf_size); | |
08388c79 | 2413 | |
26fcd5d7 | 2414 | found_ptr = (gdb_byte *) memmem (search_buf.data (), nr_search_bytes, |
d7f3ff3e | 2415 | pattern, pattern_len); |
08388c79 DE |
2416 | |
2417 | if (found_ptr != NULL) | |
2418 | { | |
26fcd5d7 | 2419 | CORE_ADDR found_addr = start_addr + (found_ptr - search_buf.data ()); |
5d502164 | 2420 | |
08388c79 | 2421 | *found_addrp = found_addr; |
08388c79 DE |
2422 | return 1; |
2423 | } | |
2424 | ||
2425 | /* Not found in this chunk, skip to next chunk. */ | |
2426 | ||
2427 | /* Don't let search_space_len wrap here, it's unsigned. */ | |
2428 | if (search_space_len >= chunk_size) | |
2429 | search_space_len -= chunk_size; | |
2430 | else | |
2431 | search_space_len = 0; | |
2432 | ||
2433 | if (search_space_len >= pattern_len) | |
2434 | { | |
2435 | unsigned keep_len = search_buf_size - chunk_size; | |
8a35fb51 | 2436 | CORE_ADDR read_addr = start_addr + chunk_size + keep_len; |
08388c79 DE |
2437 | int nr_to_read; |
2438 | ||
2439 | /* Copy the trailing part of the previous iteration to the front | |
2440 | of the buffer for the next iteration. */ | |
2441 | gdb_assert (keep_len == pattern_len - 1); | |
26fcd5d7 | 2442 | memcpy (&search_buf[0], &search_buf[chunk_size], keep_len); |
08388c79 | 2443 | |
325fac50 PA |
2444 | nr_to_read = std::min (search_space_len - keep_len, |
2445 | (ULONGEST) chunk_size); | |
08388c79 DE |
2446 | |
2447 | if (target_read (ops, TARGET_OBJECT_MEMORY, NULL, | |
26fcd5d7 | 2448 | &search_buf[keep_len], read_addr, |
08388c79 DE |
2449 | nr_to_read) != nr_to_read) |
2450 | { | |
b3dc46ff | 2451 | warning (_("Unable to access %s bytes of target " |
9b20d036 | 2452 | "memory at %s, halting search."), |
b3dc46ff | 2453 | plongest (nr_to_read), |
08388c79 | 2454 | hex_string (read_addr)); |
08388c79 DE |
2455 | return -1; |
2456 | } | |
2457 | ||
2458 | start_addr += chunk_size; | |
2459 | } | |
2460 | } | |
2461 | ||
2462 | /* Not found. */ | |
2463 | ||
08388c79 DE |
2464 | return 0; |
2465 | } | |
2466 | ||
58a5184e TT |
2467 | /* Default implementation of memory-searching. */ |
2468 | ||
2469 | static int | |
2470 | default_search_memory (struct target_ops *self, | |
2471 | CORE_ADDR start_addr, ULONGEST search_space_len, | |
2472 | const gdb_byte *pattern, ULONGEST pattern_len, | |
2473 | CORE_ADDR *found_addrp) | |
2474 | { | |
2475 | /* Start over from the top of the target stack. */ | |
2476 | return simple_search_memory (current_target.beneath, | |
2477 | start_addr, search_space_len, | |
2478 | pattern, pattern_len, found_addrp); | |
2479 | } | |
2480 | ||
08388c79 DE |
2481 | /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the |
2482 | sequence of bytes in PATTERN with length PATTERN_LEN. | |
2483 | ||
2484 | The result is 1 if found, 0 if not found, and -1 if there was an error | |
2485 | requiring halting of the search (e.g. memory read error). | |
2486 | If the pattern is found the address is recorded in FOUND_ADDRP. */ | |
2487 | ||
2488 | int | |
2489 | target_search_memory (CORE_ADDR start_addr, ULONGEST search_space_len, | |
2490 | const gdb_byte *pattern, ULONGEST pattern_len, | |
2491 | CORE_ADDR *found_addrp) | |
2492 | { | |
a7068b60 TT |
2493 | return current_target.to_search_memory (¤t_target, start_addr, |
2494 | search_space_len, | |
2495 | pattern, pattern_len, found_addrp); | |
08388c79 DE |
2496 | } |
2497 | ||
8edfe269 DJ |
2498 | /* Look through the currently pushed targets. If none of them will |
2499 | be able to restart the currently running process, issue an error | |
2500 | message. */ | |
2501 | ||
2502 | void | |
2503 | target_require_runnable (void) | |
2504 | { | |
2505 | struct target_ops *t; | |
2506 | ||
2507 | for (t = target_stack; t != NULL; t = t->beneath) | |
2508 | { | |
2509 | /* If this target knows how to create a new program, then | |
2510 | assume we will still be able to after killing the current | |
2511 | one. Either killing and mourning will not pop T, or else | |
2512 | find_default_run_target will find it again. */ | |
2513 | if (t->to_create_inferior != NULL) | |
2514 | return; | |
2515 | ||
548740d6 | 2516 | /* Do not worry about targets at certain strata that can not |
8edfe269 DJ |
2517 | create inferiors. Assume they will be pushed again if |
2518 | necessary, and continue to the process_stratum. */ | |
85e747d2 | 2519 | if (t->to_stratum == thread_stratum |
548740d6 | 2520 | || t->to_stratum == record_stratum |
85e747d2 | 2521 | || t->to_stratum == arch_stratum) |
8edfe269 DJ |
2522 | continue; |
2523 | ||
3e43a32a MS |
2524 | error (_("The \"%s\" target does not support \"run\". " |
2525 | "Try \"help target\" or \"continue\"."), | |
8edfe269 DJ |
2526 | t->to_shortname); |
2527 | } | |
2528 | ||
2529 | /* This function is only called if the target is running. In that | |
2530 | case there should have been a process_stratum target and it | |
c378eb4e | 2531 | should either know how to create inferiors, or not... */ |
9b20d036 | 2532 | internal_error (__FILE__, __LINE__, _("No targets found")); |
8edfe269 DJ |
2533 | } |
2534 | ||
6a3cb8e8 PA |
2535 | /* Whether GDB is allowed to fall back to the default run target for |
2536 | "run", "attach", etc. when no target is connected yet. */ | |
2537 | static int auto_connect_native_target = 1; | |
2538 | ||
2539 | static void | |
2540 | show_auto_connect_native_target (struct ui_file *file, int from_tty, | |
2541 | struct cmd_list_element *c, const char *value) | |
2542 | { | |
2543 | fprintf_filtered (file, | |
2544 | _("Whether GDB may automatically connect to the " | |
2545 | "native target is %s.\n"), | |
2546 | value); | |
2547 | } | |
2548 | ||
c906108c SS |
2549 | /* Look through the list of possible targets for a target that can |
2550 | execute a run or attach command without any other data. This is | |
2551 | used to locate the default process stratum. | |
2552 | ||
5f667f2d PA |
2553 | If DO_MESG is not NULL, the result is always valid (error() is |
2554 | called for errors); else, return NULL on error. */ | |
c906108c SS |
2555 | |
2556 | static struct target_ops * | |
a121b7c1 | 2557 | find_default_run_target (const char *do_mesg) |
c906108c | 2558 | { |
c906108c | 2559 | struct target_ops *runable = NULL; |
c906108c | 2560 | |
6a3cb8e8 | 2561 | if (auto_connect_native_target) |
c906108c | 2562 | { |
89a1c21a | 2563 | struct target_ops *t; |
6a3cb8e8 | 2564 | int count = 0; |
89a1c21a | 2565 | int i; |
6a3cb8e8 | 2566 | |
89a1c21a | 2567 | for (i = 0; VEC_iterate (target_ops_p, target_structs, i, t); ++i) |
c906108c | 2568 | { |
89a1c21a | 2569 | if (t->to_can_run != delegate_can_run && target_can_run (t)) |
6a3cb8e8 | 2570 | { |
89a1c21a | 2571 | runable = t; |
6a3cb8e8 PA |
2572 | ++count; |
2573 | } | |
c906108c | 2574 | } |
6a3cb8e8 PA |
2575 | |
2576 | if (count != 1) | |
2577 | runable = NULL; | |
c906108c SS |
2578 | } |
2579 | ||
6a3cb8e8 | 2580 | if (runable == NULL) |
5f667f2d PA |
2581 | { |
2582 | if (do_mesg) | |
2583 | error (_("Don't know how to %s. Try \"help target\"."), do_mesg); | |
2584 | else | |
2585 | return NULL; | |
2586 | } | |
c906108c SS |
2587 | |
2588 | return runable; | |
2589 | } | |
2590 | ||
b3ccfe11 | 2591 | /* See target.h. */ |
c906108c | 2592 | |
b3ccfe11 TT |
2593 | struct target_ops * |
2594 | find_attach_target (void) | |
c906108c SS |
2595 | { |
2596 | struct target_ops *t; | |
2597 | ||
b3ccfe11 TT |
2598 | /* If a target on the current stack can attach, use it. */ |
2599 | for (t = current_target.beneath; t != NULL; t = t->beneath) | |
2600 | { | |
2601 | if (t->to_attach != NULL) | |
2602 | break; | |
2603 | } | |
c906108c | 2604 | |
b3ccfe11 TT |
2605 | /* Otherwise, use the default run target for attaching. */ |
2606 | if (t == NULL) | |
2607 | t = find_default_run_target ("attach"); | |
b84876c2 | 2608 | |
b3ccfe11 | 2609 | return t; |
b84876c2 PA |
2610 | } |
2611 | ||
b3ccfe11 | 2612 | /* See target.h. */ |
b84876c2 | 2613 | |
b3ccfe11 TT |
2614 | struct target_ops * |
2615 | find_run_target (void) | |
9908b566 VP |
2616 | { |
2617 | struct target_ops *t; | |
2618 | ||
b3ccfe11 TT |
2619 | /* If a target on the current stack can attach, use it. */ |
2620 | for (t = current_target.beneath; t != NULL; t = t->beneath) | |
2621 | { | |
2622 | if (t->to_create_inferior != NULL) | |
2623 | break; | |
2624 | } | |
5d502164 | 2625 | |
b3ccfe11 TT |
2626 | /* Otherwise, use the default run target. */ |
2627 | if (t == NULL) | |
2628 | t = find_default_run_target ("run"); | |
9908b566 | 2629 | |
b3ccfe11 | 2630 | return t; |
9908b566 VP |
2631 | } |
2632 | ||
145b16a9 UW |
2633 | /* Implement the "info proc" command. */ |
2634 | ||
451b7c33 | 2635 | int |
7bc112c1 | 2636 | target_info_proc (const char *args, enum info_proc_what what) |
145b16a9 UW |
2637 | { |
2638 | struct target_ops *t; | |
2639 | ||
2640 | /* If we're already connected to something that can get us OS | |
2641 | related data, use it. Otherwise, try using the native | |
2642 | target. */ | |
2643 | if (current_target.to_stratum >= process_stratum) | |
2644 | t = current_target.beneath; | |
2645 | else | |
2646 | t = find_default_run_target (NULL); | |
2647 | ||
2648 | for (; t != NULL; t = t->beneath) | |
2649 | { | |
2650 | if (t->to_info_proc != NULL) | |
2651 | { | |
2652 | t->to_info_proc (t, args, what); | |
2653 | ||
2654 | if (targetdebug) | |
2655 | fprintf_unfiltered (gdb_stdlog, | |
2656 | "target_info_proc (\"%s\", %d)\n", args, what); | |
2657 | ||
451b7c33 | 2658 | return 1; |
145b16a9 UW |
2659 | } |
2660 | } | |
2661 | ||
451b7c33 | 2662 | return 0; |
145b16a9 UW |
2663 | } |
2664 | ||
03583c20 | 2665 | static int |
2bfc0540 | 2666 | find_default_supports_disable_randomization (struct target_ops *self) |
03583c20 UW |
2667 | { |
2668 | struct target_ops *t; | |
2669 | ||
2670 | t = find_default_run_target (NULL); | |
2671 | if (t && t->to_supports_disable_randomization) | |
2bfc0540 | 2672 | return (t->to_supports_disable_randomization) (t); |
03583c20 UW |
2673 | return 0; |
2674 | } | |
2675 | ||
2676 | int | |
2677 | target_supports_disable_randomization (void) | |
2678 | { | |
2679 | struct target_ops *t; | |
2680 | ||
2681 | for (t = ¤t_target; t != NULL; t = t->beneath) | |
2682 | if (t->to_supports_disable_randomization) | |
2bfc0540 | 2683 | return t->to_supports_disable_randomization (t); |
03583c20 UW |
2684 | |
2685 | return 0; | |
2686 | } | |
9908b566 | 2687 | |
1fb77080 SDJ |
2688 | /* See target/target.h. */ |
2689 | ||
2690 | int | |
2691 | target_supports_multi_process (void) | |
2692 | { | |
2693 | return (*current_target.to_supports_multi_process) (¤t_target); | |
2694 | } | |
2695 | ||
07e059b5 VP |
2696 | char * |
2697 | target_get_osdata (const char *type) | |
2698 | { | |
07e059b5 VP |
2699 | struct target_ops *t; |
2700 | ||
739ef7fb PA |
2701 | /* If we're already connected to something that can get us OS |
2702 | related data, use it. Otherwise, try using the native | |
2703 | target. */ | |
2704 | if (current_target.to_stratum >= process_stratum) | |
6d097e65 | 2705 | t = current_target.beneath; |
739ef7fb PA |
2706 | else |
2707 | t = find_default_run_target ("get OS data"); | |
07e059b5 VP |
2708 | |
2709 | if (!t) | |
2710 | return NULL; | |
2711 | ||
6d097e65 | 2712 | return target_read_stralloc (t, TARGET_OBJECT_OSDATA, type); |
07e059b5 VP |
2713 | } |
2714 | ||
8eaff7cd TT |
2715 | static struct address_space * |
2716 | default_thread_address_space (struct target_ops *self, ptid_t ptid) | |
6c95b8df PA |
2717 | { |
2718 | struct inferior *inf; | |
6c95b8df PA |
2719 | |
2720 | /* Fall-back to the "main" address space of the inferior. */ | |
c9657e70 | 2721 | inf = find_inferior_ptid (ptid); |
6c95b8df PA |
2722 | |
2723 | if (inf == NULL || inf->aspace == NULL) | |
3e43a32a | 2724 | internal_error (__FILE__, __LINE__, |
9b20d036 MS |
2725 | _("Can't determine the current " |
2726 | "address space of thread %s\n"), | |
6c95b8df PA |
2727 | target_pid_to_str (ptid)); |
2728 | ||
2729 | return inf->aspace; | |
2730 | } | |
2731 | ||
8eaff7cd TT |
2732 | /* Determine the current address space of thread PTID. */ |
2733 | ||
2734 | struct address_space * | |
2735 | target_thread_address_space (ptid_t ptid) | |
2736 | { | |
2737 | struct address_space *aspace; | |
2738 | ||
2739 | aspace = current_target.to_thread_address_space (¤t_target, ptid); | |
2740 | gdb_assert (aspace != NULL); | |
2741 | ||
8eaff7cd TT |
2742 | return aspace; |
2743 | } | |
2744 | ||
7313baad UW |
2745 | |
2746 | /* Target file operations. */ | |
2747 | ||
2748 | static struct target_ops * | |
2749 | default_fileio_target (void) | |
2750 | { | |
2751 | /* If we're already connected to something that can perform | |
2752 | file I/O, use it. Otherwise, try using the native target. */ | |
2753 | if (current_target.to_stratum >= process_stratum) | |
2754 | return current_target.beneath; | |
2755 | else | |
2756 | return find_default_run_target ("file I/O"); | |
2757 | } | |
2758 | ||
1c4b552b GB |
2759 | /* File handle for target file operations. */ |
2760 | ||
2761 | typedef struct | |
2762 | { | |
2763 | /* The target on which this file is open. */ | |
2764 | struct target_ops *t; | |
2765 | ||
2766 | /* The file descriptor on the target. */ | |
2767 | int fd; | |
2768 | } fileio_fh_t; | |
2769 | ||
2770 | DEF_VEC_O (fileio_fh_t); | |
2771 | ||
2772 | /* Vector of currently open file handles. The value returned by | |
2773 | target_fileio_open and passed as the FD argument to other | |
2774 | target_fileio_* functions is an index into this vector. This | |
2775 | vector's entries are never freed; instead, files are marked as | |
2776 | closed, and the handle becomes available for reuse. */ | |
2777 | static VEC (fileio_fh_t) *fileio_fhandles; | |
2778 | ||
2779 | /* Macro to check whether a fileio_fh_t represents a closed file. */ | |
2780 | #define is_closed_fileio_fh(fd) ((fd) < 0) | |
2781 | ||
2782 | /* Index into fileio_fhandles of the lowest handle that might be | |
2783 | closed. This permits handle reuse without searching the whole | |
2784 | list each time a new file is opened. */ | |
2785 | static int lowest_closed_fd; | |
2786 | ||
2787 | /* Acquire a target fileio file descriptor. */ | |
2788 | ||
2789 | static int | |
2790 | acquire_fileio_fd (struct target_ops *t, int fd) | |
2791 | { | |
870f88f7 | 2792 | fileio_fh_t *fh; |
1c4b552b GB |
2793 | |
2794 | gdb_assert (!is_closed_fileio_fh (fd)); | |
2795 | ||
2796 | /* Search for closed handles to reuse. */ | |
2797 | for (; | |
2798 | VEC_iterate (fileio_fh_t, fileio_fhandles, | |
2799 | lowest_closed_fd, fh); | |
2800 | lowest_closed_fd++) | |
2801 | if (is_closed_fileio_fh (fh->fd)) | |
2802 | break; | |
2803 | ||
2804 | /* Push a new handle if no closed handles were found. */ | |
2805 | if (lowest_closed_fd == VEC_length (fileio_fh_t, fileio_fhandles)) | |
2806 | fh = VEC_safe_push (fileio_fh_t, fileio_fhandles, NULL); | |
2807 | ||
2808 | /* Fill in the handle. */ | |
2809 | fh->t = t; | |
2810 | fh->fd = fd; | |
2811 | ||
2812 | /* Return its index, and start the next lookup at | |
2813 | the next index. */ | |
2814 | return lowest_closed_fd++; | |
2815 | } | |
2816 | ||
2817 | /* Release a target fileio file descriptor. */ | |
2818 | ||
2819 | static void | |
2820 | release_fileio_fd (int fd, fileio_fh_t *fh) | |
2821 | { | |
2822 | fh->fd = -1; | |
325fac50 | 2823 | lowest_closed_fd = std::min (lowest_closed_fd, fd); |
1c4b552b GB |
2824 | } |
2825 | ||
2826 | /* Return a pointer to the fileio_fhandle_t corresponding to FD. */ | |
2827 | ||
2828 | #define fileio_fd_to_fh(fd) \ | |
2829 | VEC_index (fileio_fh_t, fileio_fhandles, (fd)) | |
2830 | ||
4313b8c0 GB |
2831 | /* Helper for target_fileio_open and |
2832 | target_fileio_open_warn_if_slow. */ | |
12e2a5fd | 2833 | |
4313b8c0 GB |
2834 | static int |
2835 | target_fileio_open_1 (struct inferior *inf, const char *filename, | |
2836 | int flags, int mode, int warn_if_slow, | |
2837 | int *target_errno) | |
7313baad UW |
2838 | { |
2839 | struct target_ops *t; | |
2840 | ||
2841 | for (t = default_fileio_target (); t != NULL; t = t->beneath) | |
2842 | { | |
2843 | if (t->to_fileio_open != NULL) | |
2844 | { | |
07c138c8 | 2845 | int fd = t->to_fileio_open (t, inf, filename, flags, mode, |
4313b8c0 | 2846 | warn_if_slow, target_errno); |
7313baad | 2847 | |
1c4b552b GB |
2848 | if (fd < 0) |
2849 | fd = -1; | |
2850 | else | |
2851 | fd = acquire_fileio_fd (t, fd); | |
2852 | ||
7313baad UW |
2853 | if (targetdebug) |
2854 | fprintf_unfiltered (gdb_stdlog, | |
4313b8c0 | 2855 | "target_fileio_open (%d,%s,0x%x,0%o,%d)" |
07c138c8 GB |
2856 | " = %d (%d)\n", |
2857 | inf == NULL ? 0 : inf->num, | |
7313baad | 2858 | filename, flags, mode, |
4313b8c0 GB |
2859 | warn_if_slow, fd, |
2860 | fd != -1 ? 0 : *target_errno); | |
7313baad UW |
2861 | return fd; |
2862 | } | |
2863 | } | |
2864 | ||
2865 | *target_errno = FILEIO_ENOSYS; | |
2866 | return -1; | |
2867 | } | |
2868 | ||
12e2a5fd GB |
2869 | /* See target.h. */ |
2870 | ||
4313b8c0 GB |
2871 | int |
2872 | target_fileio_open (struct inferior *inf, const char *filename, | |
2873 | int flags, int mode, int *target_errno) | |
2874 | { | |
2875 | return target_fileio_open_1 (inf, filename, flags, mode, 0, | |
2876 | target_errno); | |
2877 | } | |
2878 | ||
2879 | /* See target.h. */ | |
2880 | ||
2881 | int | |
2882 | target_fileio_open_warn_if_slow (struct inferior *inf, | |
2883 | const char *filename, | |
2884 | int flags, int mode, int *target_errno) | |
2885 | { | |
2886 | return target_fileio_open_1 (inf, filename, flags, mode, 1, | |
2887 | target_errno); | |
2888 | } | |
2889 | ||
2890 | /* See target.h. */ | |
2891 | ||
7313baad UW |
2892 | int |
2893 | target_fileio_pwrite (int fd, const gdb_byte *write_buf, int len, | |
2894 | ULONGEST offset, int *target_errno) | |
2895 | { | |
1c4b552b GB |
2896 | fileio_fh_t *fh = fileio_fd_to_fh (fd); |
2897 | int ret = -1; | |
7313baad | 2898 | |
1c4b552b GB |
2899 | if (is_closed_fileio_fh (fh->fd)) |
2900 | *target_errno = EBADF; | |
2901 | else | |
2902 | ret = fh->t->to_fileio_pwrite (fh->t, fh->fd, write_buf, | |
2903 | len, offset, target_errno); | |
7313baad | 2904 | |
1c4b552b GB |
2905 | if (targetdebug) |
2906 | fprintf_unfiltered (gdb_stdlog, | |
2907 | "target_fileio_pwrite (%d,...,%d,%s) " | |
2908 | "= %d (%d)\n", | |
2909 | fd, len, pulongest (offset), | |
2910 | ret, ret != -1 ? 0 : *target_errno); | |
2911 | return ret; | |
7313baad UW |
2912 | } |
2913 | ||
12e2a5fd GB |
2914 | /* See target.h. */ |
2915 | ||
7313baad UW |
2916 | int |
2917 | target_fileio_pread (int fd, gdb_byte *read_buf, int len, | |
2918 | ULONGEST offset, int *target_errno) | |
2919 | { | |
1c4b552b GB |
2920 | fileio_fh_t *fh = fileio_fd_to_fh (fd); |
2921 | int ret = -1; | |
7313baad | 2922 | |
1c4b552b GB |
2923 | if (is_closed_fileio_fh (fh->fd)) |
2924 | *target_errno = EBADF; | |
2925 | else | |
2926 | ret = fh->t->to_fileio_pread (fh->t, fh->fd, read_buf, | |
2927 | len, offset, target_errno); | |
7313baad | 2928 | |
1c4b552b GB |
2929 | if (targetdebug) |
2930 | fprintf_unfiltered (gdb_stdlog, | |
2931 | "target_fileio_pread (%d,...,%d,%s) " | |
2932 | "= %d (%d)\n", | |
2933 | fd, len, pulongest (offset), | |
2934 | ret, ret != -1 ? 0 : *target_errno); | |
9b15c1f0 GB |
2935 | return ret; |
2936 | } | |
2937 | ||
2938 | /* See target.h. */ | |
12e2a5fd | 2939 | |
9b15c1f0 GB |
2940 | int |
2941 | target_fileio_fstat (int fd, struct stat *sb, int *target_errno) | |
2942 | { | |
2943 | fileio_fh_t *fh = fileio_fd_to_fh (fd); | |
2944 | int ret = -1; | |
2945 | ||
2946 | if (is_closed_fileio_fh (fh->fd)) | |
2947 | *target_errno = EBADF; | |
2948 | else | |
2949 | ret = fh->t->to_fileio_fstat (fh->t, fh->fd, sb, target_errno); | |
2950 | ||
2951 | if (targetdebug) | |
2952 | fprintf_unfiltered (gdb_stdlog, | |
2953 | "target_fileio_fstat (%d) = %d (%d)\n", | |
2954 | fd, ret, ret != -1 ? 0 : *target_errno); | |
1c4b552b | 2955 | return ret; |
7313baad UW |
2956 | } |
2957 | ||
12e2a5fd GB |
2958 | /* See target.h. */ |
2959 | ||
7313baad UW |
2960 | int |
2961 | target_fileio_close (int fd, int *target_errno) | |
2962 | { | |
1c4b552b GB |
2963 | fileio_fh_t *fh = fileio_fd_to_fh (fd); |
2964 | int ret = -1; | |
7313baad | 2965 | |
1c4b552b GB |
2966 | if (is_closed_fileio_fh (fh->fd)) |
2967 | *target_errno = EBADF; | |
2968 | else | |
7313baad | 2969 | { |
1c4b552b GB |
2970 | ret = fh->t->to_fileio_close (fh->t, fh->fd, target_errno); |
2971 | release_fileio_fd (fd, fh); | |
7313baad UW |
2972 | } |
2973 | ||
1c4b552b GB |
2974 | if (targetdebug) |
2975 | fprintf_unfiltered (gdb_stdlog, | |
2976 | "target_fileio_close (%d) = %d (%d)\n", | |
2977 | fd, ret, ret != -1 ? 0 : *target_errno); | |
2978 | return ret; | |
7313baad UW |
2979 | } |
2980 | ||
12e2a5fd GB |
2981 | /* See target.h. */ |
2982 | ||
7313baad | 2983 | int |
07c138c8 GB |
2984 | target_fileio_unlink (struct inferior *inf, const char *filename, |
2985 | int *target_errno) | |
7313baad UW |
2986 | { |
2987 | struct target_ops *t; | |
2988 | ||
2989 | for (t = default_fileio_target (); t != NULL; t = t->beneath) | |
2990 | { | |
2991 | if (t->to_fileio_unlink != NULL) | |
2992 | { | |
07c138c8 GB |
2993 | int ret = t->to_fileio_unlink (t, inf, filename, |
2994 | target_errno); | |
7313baad UW |
2995 | |
2996 | if (targetdebug) | |
2997 | fprintf_unfiltered (gdb_stdlog, | |
07c138c8 GB |
2998 | "target_fileio_unlink (%d,%s)" |
2999 | " = %d (%d)\n", | |
3000 | inf == NULL ? 0 : inf->num, filename, | |
3001 | ret, ret != -1 ? 0 : *target_errno); | |
7313baad UW |
3002 | return ret; |
3003 | } | |
3004 | } | |
3005 | ||
3006 | *target_errno = FILEIO_ENOSYS; | |
3007 | return -1; | |
3008 | } | |
3009 | ||
12e2a5fd GB |
3010 | /* See target.h. */ |
3011 | ||
b9e7b9c3 | 3012 | char * |
07c138c8 GB |
3013 | target_fileio_readlink (struct inferior *inf, const char *filename, |
3014 | int *target_errno) | |
b9e7b9c3 UW |
3015 | { |
3016 | struct target_ops *t; | |
3017 | ||
3018 | for (t = default_fileio_target (); t != NULL; t = t->beneath) | |
3019 | { | |
3020 | if (t->to_fileio_readlink != NULL) | |
3021 | { | |
07c138c8 GB |
3022 | char *ret = t->to_fileio_readlink (t, inf, filename, |
3023 | target_errno); | |
b9e7b9c3 UW |
3024 | |
3025 | if (targetdebug) | |
3026 | fprintf_unfiltered (gdb_stdlog, | |
07c138c8 GB |
3027 | "target_fileio_readlink (%d,%s)" |
3028 | " = %s (%d)\n", | |
3029 | inf == NULL ? 0 : inf->num, | |
b9e7b9c3 UW |
3030 | filename, ret? ret : "(nil)", |
3031 | ret? 0 : *target_errno); | |
3032 | return ret; | |
3033 | } | |
3034 | } | |
3035 | ||
3036 | *target_errno = FILEIO_ENOSYS; | |
3037 | return NULL; | |
3038 | } | |
3039 | ||
7313baad UW |
3040 | static void |
3041 | target_fileio_close_cleanup (void *opaque) | |
3042 | { | |
3043 | int fd = *(int *) opaque; | |
3044 | int target_errno; | |
3045 | ||
3046 | target_fileio_close (fd, &target_errno); | |
3047 | } | |
3048 | ||
07c138c8 GB |
3049 | /* Read target file FILENAME, in the filesystem as seen by INF. If |
3050 | INF is NULL, use the filesystem seen by the debugger (GDB or, for | |
3051 | remote targets, the remote stub). Store the result in *BUF_P and | |
3052 | return the size of the transferred data. PADDING additional bytes | |
3053 | are available in *BUF_P. This is a helper function for | |
3054 | target_fileio_read_alloc; see the declaration of that function for | |
3055 | more information. */ | |
7313baad | 3056 | |
f7af1fcd JK |
3057 | static LONGEST |
3058 | target_fileio_read_alloc_1 (struct inferior *inf, const char *filename, | |
3059 | gdb_byte **buf_p, int padding) | |
3060 | { | |
3061 | struct cleanup *close_cleanup; | |
db1ff28b JK |
3062 | size_t buf_alloc, buf_pos; |
3063 | gdb_byte *buf; | |
3064 | LONGEST n; | |
3065 | int fd; | |
3066 | int target_errno; | |
f7af1fcd | 3067 | |
db1ff28b JK |
3068 | fd = target_fileio_open (inf, filename, FILEIO_O_RDONLY, 0700, |
3069 | &target_errno); | |
f7af1fcd JK |
3070 | if (fd == -1) |
3071 | return -1; | |
3072 | ||
3073 | close_cleanup = make_cleanup (target_fileio_close_cleanup, &fd); | |
db1ff28b JK |
3074 | |
3075 | /* Start by reading up to 4K at a time. The target will throttle | |
3076 | this number down if necessary. */ | |
3077 | buf_alloc = 4096; | |
224c3ddb | 3078 | buf = (gdb_byte *) xmalloc (buf_alloc); |
db1ff28b JK |
3079 | buf_pos = 0; |
3080 | while (1) | |
3081 | { | |
3082 | n = target_fileio_pread (fd, &buf[buf_pos], | |
3083 | buf_alloc - buf_pos - padding, buf_pos, | |
3084 | &target_errno); | |
3085 | if (n < 0) | |
3086 | { | |
3087 | /* An error occurred. */ | |
3088 | do_cleanups (close_cleanup); | |
3089 | xfree (buf); | |
3090 | return -1; | |
3091 | } | |
3092 | else if (n == 0) | |
3093 | { | |
3094 | /* Read all there was. */ | |
3095 | do_cleanups (close_cleanup); | |
3096 | if (buf_pos == 0) | |
3097 | xfree (buf); | |
3098 | else | |
3099 | *buf_p = buf; | |
3100 | return buf_pos; | |
3101 | } | |
3102 | ||
3103 | buf_pos += n; | |
3104 | ||
3105 | /* If the buffer is filling up, expand it. */ | |
3106 | if (buf_alloc < buf_pos * 2) | |
3107 | { | |
3108 | buf_alloc *= 2; | |
224c3ddb | 3109 | buf = (gdb_byte *) xrealloc (buf, buf_alloc); |
db1ff28b JK |
3110 | } |
3111 | ||
3112 | QUIT; | |
3113 | } | |
f7af1fcd JK |
3114 | } |
3115 | ||
12e2a5fd | 3116 | /* See target.h. */ |
7313baad UW |
3117 | |
3118 | LONGEST | |
07c138c8 GB |
3119 | target_fileio_read_alloc (struct inferior *inf, const char *filename, |
3120 | gdb_byte **buf_p) | |
7313baad | 3121 | { |
07c138c8 | 3122 | return target_fileio_read_alloc_1 (inf, filename, buf_p, 0); |
7313baad UW |
3123 | } |
3124 | ||
db1ff28b | 3125 | /* See target.h. */ |
f7af1fcd JK |
3126 | |
3127 | char * | |
3128 | target_fileio_read_stralloc (struct inferior *inf, const char *filename) | |
3129 | { | |
db1ff28b JK |
3130 | gdb_byte *buffer; |
3131 | char *bufstr; | |
3132 | LONGEST i, transferred; | |
3133 | ||
3134 | transferred = target_fileio_read_alloc_1 (inf, filename, &buffer, 1); | |
3135 | bufstr = (char *) buffer; | |
3136 | ||
3137 | if (transferred < 0) | |
3138 | return NULL; | |
3139 | ||
3140 | if (transferred == 0) | |
3141 | return xstrdup (""); | |
3142 | ||
3143 | bufstr[transferred] = 0; | |
3144 | ||
3145 | /* Check for embedded NUL bytes; but allow trailing NULs. */ | |
3146 | for (i = strlen (bufstr); i < transferred; i++) | |
3147 | if (bufstr[i] != 0) | |
3148 | { | |
3149 | warning (_("target file %s " | |
3150 | "contained unexpected null characters"), | |
3151 | filename); | |
3152 | break; | |
3153 | } | |
3154 | ||
3155 | return bufstr; | |
f7af1fcd | 3156 | } |
7313baad | 3157 | |
db1ff28b | 3158 | |
e0d24f8d | 3159 | static int |
31568a15 TT |
3160 | default_region_ok_for_hw_watchpoint (struct target_ops *self, |
3161 | CORE_ADDR addr, int len) | |
e0d24f8d | 3162 | { |
f5656ead | 3163 | return (len <= gdbarch_ptr_bit (target_gdbarch ()) / TARGET_CHAR_BIT); |
ccaa32c7 GS |
3164 | } |
3165 | ||
5009afc5 AS |
3166 | static int |
3167 | default_watchpoint_addr_within_range (struct target_ops *target, | |
3168 | CORE_ADDR addr, | |
3169 | CORE_ADDR start, int length) | |
3170 | { | |
3171 | return addr >= start && addr < start + length; | |
3172 | } | |
3173 | ||
c2250ad1 UW |
3174 | static struct gdbarch * |
3175 | default_thread_architecture (struct target_ops *ops, ptid_t ptid) | |
3176 | { | |
f5656ead | 3177 | return target_gdbarch (); |
c2250ad1 UW |
3178 | } |
3179 | ||
c906108c | 3180 | static int |
555bbdeb TT |
3181 | return_zero (struct target_ops *ignore) |
3182 | { | |
3183 | return 0; | |
3184 | } | |
3185 | ||
3186 | static int | |
3187 | return_zero_has_execution (struct target_ops *ignore, ptid_t ignore2) | |
c906108c SS |
3188 | { |
3189 | return 0; | |
3190 | } | |
3191 | ||
ed9a39eb JM |
3192 | /* |
3193 | * Find the next target down the stack from the specified target. | |
3194 | */ | |
3195 | ||
3196 | struct target_ops * | |
fba45db2 | 3197 | find_target_beneath (struct target_ops *t) |
ed9a39eb | 3198 | { |
258b763a | 3199 | return t->beneath; |
ed9a39eb JM |
3200 | } |
3201 | ||
8b06beed TT |
3202 | /* See target.h. */ |
3203 | ||
3204 | struct target_ops * | |
3205 | find_target_at (enum strata stratum) | |
3206 | { | |
3207 | struct target_ops *t; | |
3208 | ||
3209 | for (t = current_target.beneath; t != NULL; t = t->beneath) | |
3210 | if (t->to_stratum == stratum) | |
3211 | return t; | |
3212 | ||
3213 | return NULL; | |
3214 | } | |
3215 | ||
c906108c | 3216 | \f |
0f48b757 PA |
3217 | |
3218 | /* See target.h */ | |
3219 | ||
3220 | void | |
3221 | target_announce_detach (int from_tty) | |
3222 | { | |
3223 | pid_t pid; | |
a121b7c1 | 3224 | const char *exec_file; |
0f48b757 PA |
3225 | |
3226 | if (!from_tty) | |
3227 | return; | |
3228 | ||
3229 | exec_file = get_exec_file (0); | |
3230 | if (exec_file == NULL) | |
3231 | exec_file = ""; | |
3232 | ||
3233 | pid = ptid_get_pid (inferior_ptid); | |
3234 | printf_unfiltered (_("Detaching from program: %s, %s\n"), exec_file, | |
3235 | target_pid_to_str (pid_to_ptid (pid))); | |
3236 | gdb_flush (gdb_stdout); | |
3237 | } | |
3238 | ||
c906108c SS |
3239 | /* The inferior process has died. Long live the inferior! */ |
3240 | ||
3241 | void | |
fba45db2 | 3242 | generic_mourn_inferior (void) |
c906108c | 3243 | { |
7f9f62ba | 3244 | ptid_t ptid; |
c906108c | 3245 | |
7f9f62ba | 3246 | ptid = inferior_ptid; |
39f77062 | 3247 | inferior_ptid = null_ptid; |
7f9f62ba | 3248 | |
f59f708a PA |
3249 | /* Mark breakpoints uninserted in case something tries to delete a |
3250 | breakpoint while we delete the inferior's threads (which would | |
3251 | fail, since the inferior is long gone). */ | |
3252 | mark_breakpoints_out (); | |
3253 | ||
7f9f62ba PA |
3254 | if (!ptid_equal (ptid, null_ptid)) |
3255 | { | |
3256 | int pid = ptid_get_pid (ptid); | |
6c95b8df | 3257 | exit_inferior (pid); |
7f9f62ba PA |
3258 | } |
3259 | ||
f59f708a PA |
3260 | /* Note this wipes step-resume breakpoints, so needs to be done |
3261 | after exit_inferior, which ends up referencing the step-resume | |
3262 | breakpoints through clear_thread_inferior_resources. */ | |
c906108c | 3263 | breakpoint_init_inferior (inf_exited); |
f59f708a | 3264 | |
c906108c SS |
3265 | registers_changed (); |
3266 | ||
c906108c SS |
3267 | reopen_exec_file (); |
3268 | reinit_frame_cache (); | |
3269 | ||
9a4105ab AC |
3270 | if (deprecated_detach_hook) |
3271 | deprecated_detach_hook (); | |
c906108c SS |
3272 | } |
3273 | \f | |
fd0a2a6f MK |
3274 | /* Convert a normal process ID to a string. Returns the string in a |
3275 | static buffer. */ | |
c906108c | 3276 | |
7a114964 | 3277 | const char * |
39f77062 | 3278 | normal_pid_to_str (ptid_t ptid) |
c906108c | 3279 | { |
fd0a2a6f | 3280 | static char buf[32]; |
c906108c | 3281 | |
5fff8fc0 | 3282 | xsnprintf (buf, sizeof buf, "process %d", ptid_get_pid (ptid)); |
c906108c SS |
3283 | return buf; |
3284 | } | |
3285 | ||
7a114964 | 3286 | static const char * |
770234d3 | 3287 | default_pid_to_str (struct target_ops *ops, ptid_t ptid) |
117de6a9 PA |
3288 | { |
3289 | return normal_pid_to_str (ptid); | |
3290 | } | |
3291 | ||
9b4eba8e HZ |
3292 | /* Error-catcher for target_find_memory_regions. */ |
3293 | static int | |
2e73927c TT |
3294 | dummy_find_memory_regions (struct target_ops *self, |
3295 | find_memory_region_ftype ignore1, void *ignore2) | |
be4d1333 | 3296 | { |
9b4eba8e | 3297 | error (_("Command not implemented for this target.")); |
be4d1333 MS |
3298 | return 0; |
3299 | } | |
3300 | ||
9b4eba8e HZ |
3301 | /* Error-catcher for target_make_corefile_notes. */ |
3302 | static char * | |
fc6691b2 TT |
3303 | dummy_make_corefile_notes (struct target_ops *self, |
3304 | bfd *ignore1, int *ignore2) | |
be4d1333 | 3305 | { |
9b4eba8e | 3306 | error (_("Command not implemented for this target.")); |
be4d1333 MS |
3307 | return NULL; |
3308 | } | |
3309 | ||
c906108c SS |
3310 | /* Set up the handful of non-empty slots needed by the dummy target |
3311 | vector. */ | |
3312 | ||
3313 | static void | |
fba45db2 | 3314 | init_dummy_target (void) |
c906108c SS |
3315 | { |
3316 | dummy_target.to_shortname = "None"; | |
3317 | dummy_target.to_longname = "None"; | |
3318 | dummy_target.to_doc = ""; | |
03583c20 UW |
3319 | dummy_target.to_supports_disable_randomization |
3320 | = find_default_supports_disable_randomization; | |
c906108c | 3321 | dummy_target.to_stratum = dummy_stratum; |
555bbdeb TT |
3322 | dummy_target.to_has_all_memory = return_zero; |
3323 | dummy_target.to_has_memory = return_zero; | |
3324 | dummy_target.to_has_stack = return_zero; | |
3325 | dummy_target.to_has_registers = return_zero; | |
3326 | dummy_target.to_has_execution = return_zero_has_execution; | |
c906108c | 3327 | dummy_target.to_magic = OPS_MAGIC; |
1101cb7b TT |
3328 | |
3329 | install_dummy_methods (&dummy_target); | |
c906108c | 3330 | } |
c906108c | 3331 | \f |
c906108c | 3332 | |
f1c07ab0 | 3333 | void |
460014f5 | 3334 | target_close (struct target_ops *targ) |
f1c07ab0 | 3335 | { |
7fdc1521 TT |
3336 | gdb_assert (!target_is_pushed (targ)); |
3337 | ||
f1c07ab0 | 3338 | if (targ->to_xclose != NULL) |
460014f5 | 3339 | targ->to_xclose (targ); |
f1c07ab0 | 3340 | else if (targ->to_close != NULL) |
de90e03d | 3341 | targ->to_close (targ); |
947b8855 PA |
3342 | |
3343 | if (targetdebug) | |
460014f5 | 3344 | fprintf_unfiltered (gdb_stdlog, "target_close ()\n"); |
f1c07ab0 AC |
3345 | } |
3346 | ||
28439f5e PA |
3347 | int |
3348 | target_thread_alive (ptid_t ptid) | |
c906108c | 3349 | { |
a7068b60 | 3350 | return current_target.to_thread_alive (¤t_target, ptid); |
28439f5e PA |
3351 | } |
3352 | ||
3353 | void | |
e8032dde | 3354 | target_update_thread_list (void) |
28439f5e | 3355 | { |
e8032dde | 3356 | current_target.to_update_thread_list (¤t_target); |
c906108c SS |
3357 | } |
3358 | ||
d914c394 SS |
3359 | void |
3360 | target_stop (ptid_t ptid) | |
3361 | { | |
3362 | if (!may_stop) | |
3363 | { | |
3364 | warning (_("May not interrupt or stop the target, ignoring attempt")); | |
3365 | return; | |
3366 | } | |
3367 | ||
1eab8a48 | 3368 | (*current_target.to_stop) (¤t_target, ptid); |
d914c394 SS |
3369 | } |
3370 | ||
bfedc46a PA |
3371 | void |
3372 | target_interrupt (ptid_t ptid) | |
3373 | { | |
3374 | if (!may_stop) | |
3375 | { | |
3376 | warning (_("May not interrupt or stop the target, ignoring attempt")); | |
3377 | return; | |
3378 | } | |
3379 | ||
3380 | (*current_target.to_interrupt) (¤t_target, ptid); | |
3381 | } | |
3382 | ||
abc56d60 PA |
3383 | /* See target.h. */ |
3384 | ||
93692b58 PA |
3385 | void |
3386 | target_pass_ctrlc (void) | |
3387 | { | |
3388 | (*current_target.to_pass_ctrlc) (¤t_target); | |
3389 | } | |
3390 | ||
3391 | /* See target.h. */ | |
3392 | ||
3393 | void | |
3394 | default_target_pass_ctrlc (struct target_ops *ops) | |
3395 | { | |
3396 | target_interrupt (inferior_ptid); | |
3397 | } | |
3398 | ||
f8c1d06b GB |
3399 | /* See target/target.h. */ |
3400 | ||
3401 | void | |
03f4463b | 3402 | target_stop_and_wait (ptid_t ptid) |
f8c1d06b GB |
3403 | { |
3404 | struct target_waitstatus status; | |
3405 | int was_non_stop = non_stop; | |
3406 | ||
3407 | non_stop = 1; | |
3408 | target_stop (ptid); | |
3409 | ||
3410 | memset (&status, 0, sizeof (status)); | |
3411 | target_wait (ptid, &status, 0); | |
3412 | ||
3413 | non_stop = was_non_stop; | |
3414 | } | |
3415 | ||
3416 | /* See target/target.h. */ | |
3417 | ||
3418 | void | |
03f4463b | 3419 | target_continue_no_signal (ptid_t ptid) |
f8c1d06b GB |
3420 | { |
3421 | target_resume (ptid, 0, GDB_SIGNAL_0); | |
3422 | } | |
3423 | ||
049a8570 SDJ |
3424 | /* See target/target.h. */ |
3425 | ||
3426 | void | |
3427 | target_continue (ptid_t ptid, enum gdb_signal signal) | |
3428 | { | |
3429 | target_resume (ptid, 0, signal); | |
3430 | } | |
3431 | ||
09826ec5 PA |
3432 | /* Concatenate ELEM to LIST, a comma separate list, and return the |
3433 | result. The LIST incoming argument is released. */ | |
3434 | ||
3435 | static char * | |
3436 | str_comma_list_concat_elem (char *list, const char *elem) | |
3437 | { | |
3438 | if (list == NULL) | |
3439 | return xstrdup (elem); | |
3440 | else | |
3441 | return reconcat (list, list, ", ", elem, (char *) NULL); | |
3442 | } | |
3443 | ||
3444 | /* Helper for target_options_to_string. If OPT is present in | |
3445 | TARGET_OPTIONS, append the OPT_STR (string version of OPT) in RET. | |
3446 | Returns the new resulting string. OPT is removed from | |
3447 | TARGET_OPTIONS. */ | |
3448 | ||
3449 | static char * | |
3450 | do_option (int *target_options, char *ret, | |
a121b7c1 | 3451 | int opt, const char *opt_str) |
09826ec5 PA |
3452 | { |
3453 | if ((*target_options & opt) != 0) | |
3454 | { | |
3455 | ret = str_comma_list_concat_elem (ret, opt_str); | |
3456 | *target_options &= ~opt; | |
3457 | } | |
3458 | ||
3459 | return ret; | |
3460 | } | |
3461 | ||
3462 | char * | |
3463 | target_options_to_string (int target_options) | |
3464 | { | |
3465 | char *ret = NULL; | |
3466 | ||
3467 | #define DO_TARG_OPTION(OPT) \ | |
3468 | ret = do_option (&target_options, ret, OPT, #OPT) | |
3469 | ||
3470 | DO_TARG_OPTION (TARGET_WNOHANG); | |
3471 | ||
3472 | if (target_options != 0) | |
3473 | ret = str_comma_list_concat_elem (ret, "unknown???"); | |
3474 | ||
3475 | if (ret == NULL) | |
3476 | ret = xstrdup (""); | |
3477 | return ret; | |
3478 | } | |
3479 | ||
28439f5e PA |
3480 | void |
3481 | target_fetch_registers (struct regcache *regcache, int regno) | |
c906108c | 3482 | { |
ad5989bd TT |
3483 | current_target.to_fetch_registers (¤t_target, regcache, regno); |
3484 | if (targetdebug) | |
ef79d9a3 | 3485 | regcache->debug_print_register ("target_fetch_registers", regno); |
c906108c SS |
3486 | } |
3487 | ||
28439f5e PA |
3488 | void |
3489 | target_store_registers (struct regcache *regcache, int regno) | |
c906108c | 3490 | { |
d914c394 SS |
3491 | if (!may_write_registers) |
3492 | error (_("Writing to registers is not allowed (regno %d)"), regno); | |
3493 | ||
6b84065d TT |
3494 | current_target.to_store_registers (¤t_target, regcache, regno); |
3495 | if (targetdebug) | |
28439f5e | 3496 | { |
ef79d9a3 | 3497 | regcache->debug_print_register ("target_store_registers", regno); |
28439f5e | 3498 | } |
c906108c SS |
3499 | } |
3500 | ||
dc146f7c VP |
3501 | int |
3502 | target_core_of_thread (ptid_t ptid) | |
3503 | { | |
a7068b60 | 3504 | return current_target.to_core_of_thread (¤t_target, ptid); |
dc146f7c VP |
3505 | } |
3506 | ||
936d2992 PA |
3507 | int |
3508 | simple_verify_memory (struct target_ops *ops, | |
3509 | const gdb_byte *data, CORE_ADDR lma, ULONGEST size) | |
3510 | { | |
3511 | LONGEST total_xfered = 0; | |
3512 | ||
3513 | while (total_xfered < size) | |
3514 | { | |
3515 | ULONGEST xfered_len; | |
3516 | enum target_xfer_status status; | |
3517 | gdb_byte buf[1024]; | |
768adc05 | 3518 | ULONGEST howmuch = std::min<ULONGEST> (sizeof (buf), size - total_xfered); |
936d2992 PA |
3519 | |
3520 | status = target_xfer_partial (ops, TARGET_OBJECT_MEMORY, NULL, | |
3521 | buf, NULL, lma + total_xfered, howmuch, | |
3522 | &xfered_len); | |
3523 | if (status == TARGET_XFER_OK | |
3524 | && memcmp (data + total_xfered, buf, xfered_len) == 0) | |
3525 | { | |
3526 | total_xfered += xfered_len; | |
3527 | QUIT; | |
3528 | } | |
3529 | else | |
3530 | return 0; | |
3531 | } | |
3532 | return 1; | |
3533 | } | |
3534 | ||
3535 | /* Default implementation of memory verification. */ | |
3536 | ||
3537 | static int | |
3538 | default_verify_memory (struct target_ops *self, | |
3539 | const gdb_byte *data, CORE_ADDR memaddr, ULONGEST size) | |
3540 | { | |
3541 | /* Start over from the top of the target stack. */ | |
3542 | return simple_verify_memory (current_target.beneath, | |
3543 | data, memaddr, size); | |
3544 | } | |
3545 | ||
4a5e7a5b PA |
3546 | int |
3547 | target_verify_memory (const gdb_byte *data, CORE_ADDR memaddr, ULONGEST size) | |
3548 | { | |
a7068b60 TT |
3549 | return current_target.to_verify_memory (¤t_target, |
3550 | data, memaddr, size); | |
4a5e7a5b PA |
3551 | } |
3552 | ||
9c06b0b4 TJB |
3553 | /* The documentation for this function is in its prototype declaration in |
3554 | target.h. */ | |
3555 | ||
3556 | int | |
f4b0a671 SM |
3557 | target_insert_mask_watchpoint (CORE_ADDR addr, CORE_ADDR mask, |
3558 | enum target_hw_bp_type rw) | |
9c06b0b4 | 3559 | { |
a7068b60 TT |
3560 | return current_target.to_insert_mask_watchpoint (¤t_target, |
3561 | addr, mask, rw); | |
9c06b0b4 TJB |
3562 | } |
3563 | ||
3564 | /* The documentation for this function is in its prototype declaration in | |
3565 | target.h. */ | |
3566 | ||
3567 | int | |
f4b0a671 SM |
3568 | target_remove_mask_watchpoint (CORE_ADDR addr, CORE_ADDR mask, |
3569 | enum target_hw_bp_type rw) | |
9c06b0b4 | 3570 | { |
a7068b60 TT |
3571 | return current_target.to_remove_mask_watchpoint (¤t_target, |
3572 | addr, mask, rw); | |
9c06b0b4 TJB |
3573 | } |
3574 | ||
3575 | /* The documentation for this function is in its prototype declaration | |
3576 | in target.h. */ | |
3577 | ||
3578 | int | |
3579 | target_masked_watch_num_registers (CORE_ADDR addr, CORE_ADDR mask) | |
3580 | { | |
6c7e5e5c TT |
3581 | return current_target.to_masked_watch_num_registers (¤t_target, |
3582 | addr, mask); | |
9c06b0b4 TJB |
3583 | } |
3584 | ||
f1310107 TJB |
3585 | /* The documentation for this function is in its prototype declaration |
3586 | in target.h. */ | |
3587 | ||
3588 | int | |
3589 | target_ranged_break_num_registers (void) | |
3590 | { | |
a134316b | 3591 | return current_target.to_ranged_break_num_registers (¤t_target); |
f1310107 TJB |
3592 | } |
3593 | ||
02d27625 MM |
3594 | /* See target.h. */ |
3595 | ||
043c3577 MM |
3596 | int |
3597 | target_supports_btrace (enum btrace_format format) | |
3598 | { | |
3599 | return current_target.to_supports_btrace (¤t_target, format); | |
3600 | } | |
3601 | ||
3602 | /* See target.h. */ | |
3603 | ||
02d27625 | 3604 | struct btrace_target_info * |
f4abbc16 | 3605 | target_enable_btrace (ptid_t ptid, const struct btrace_config *conf) |
02d27625 | 3606 | { |
f4abbc16 | 3607 | return current_target.to_enable_btrace (¤t_target, ptid, conf); |
02d27625 MM |
3608 | } |
3609 | ||
3610 | /* See target.h. */ | |
3611 | ||
3612 | void | |
3613 | target_disable_btrace (struct btrace_target_info *btinfo) | |
3614 | { | |
8dc292d3 | 3615 | current_target.to_disable_btrace (¤t_target, btinfo); |
02d27625 MM |
3616 | } |
3617 | ||
3618 | /* See target.h. */ | |
3619 | ||
3620 | void | |
3621 | target_teardown_btrace (struct btrace_target_info *btinfo) | |
3622 | { | |
9ace480d | 3623 | current_target.to_teardown_btrace (¤t_target, btinfo); |
02d27625 MM |
3624 | } |
3625 | ||
3626 | /* See target.h. */ | |
3627 | ||
969c39fb | 3628 | enum btrace_error |
734b0e4b | 3629 | target_read_btrace (struct btrace_data *btrace, |
969c39fb | 3630 | struct btrace_target_info *btinfo, |
02d27625 MM |
3631 | enum btrace_read_type type) |
3632 | { | |
eb5b20d4 | 3633 | return current_target.to_read_btrace (¤t_target, btrace, btinfo, type); |
02d27625 MM |
3634 | } |
3635 | ||
d02ed0bb MM |
3636 | /* See target.h. */ |
3637 | ||
f4abbc16 MM |
3638 | const struct btrace_config * |
3639 | target_btrace_conf (const struct btrace_target_info *btinfo) | |
3640 | { | |
3641 | return current_target.to_btrace_conf (¤t_target, btinfo); | |
3642 | } | |
3643 | ||
3644 | /* See target.h. */ | |
3645 | ||
7c1687a9 MM |
3646 | void |
3647 | target_stop_recording (void) | |
3648 | { | |
ee97f592 | 3649 | current_target.to_stop_recording (¤t_target); |
7c1687a9 MM |
3650 | } |
3651 | ||
3652 | /* See target.h. */ | |
3653 | ||
d02ed0bb | 3654 | void |
85e1311a | 3655 | target_save_record (const char *filename) |
d02ed0bb | 3656 | { |
f09e2107 | 3657 | current_target.to_save_record (¤t_target, filename); |
d02ed0bb MM |
3658 | } |
3659 | ||
3660 | /* See target.h. */ | |
3661 | ||
3662 | int | |
3663 | target_supports_delete_record (void) | |
3664 | { | |
3665 | struct target_ops *t; | |
3666 | ||
3667 | for (t = current_target.beneath; t != NULL; t = t->beneath) | |
b0ed115f TT |
3668 | if (t->to_delete_record != delegate_delete_record |
3669 | && t->to_delete_record != tdefault_delete_record) | |
d02ed0bb MM |
3670 | return 1; |
3671 | ||
3672 | return 0; | |
3673 | } | |
3674 | ||
3675 | /* See target.h. */ | |
3676 | ||
3677 | void | |
3678 | target_delete_record (void) | |
3679 | { | |
07366925 | 3680 | current_target.to_delete_record (¤t_target); |
d02ed0bb MM |
3681 | } |
3682 | ||
3683 | /* See target.h. */ | |
3684 | ||
b158a20f TW |
3685 | enum record_method |
3686 | target_record_method (ptid_t ptid) | |
3687 | { | |
3688 | return current_target.to_record_method (¤t_target, ptid); | |
3689 | } | |
3690 | ||
3691 | /* See target.h. */ | |
3692 | ||
d02ed0bb | 3693 | int |
a52eab48 | 3694 | target_record_is_replaying (ptid_t ptid) |
d02ed0bb | 3695 | { |
a52eab48 | 3696 | return current_target.to_record_is_replaying (¤t_target, ptid); |
d02ed0bb MM |
3697 | } |
3698 | ||
3699 | /* See target.h. */ | |
3700 | ||
7ff27e9b MM |
3701 | int |
3702 | target_record_will_replay (ptid_t ptid, int dir) | |
3703 | { | |
3704 | return current_target.to_record_will_replay (¤t_target, ptid, dir); | |
3705 | } | |
3706 | ||
3707 | /* See target.h. */ | |
3708 | ||
797094dd MM |
3709 | void |
3710 | target_record_stop_replaying (void) | |
3711 | { | |
3712 | current_target.to_record_stop_replaying (¤t_target); | |
3713 | } | |
3714 | ||
3715 | /* See target.h. */ | |
3716 | ||
d02ed0bb MM |
3717 | void |
3718 | target_goto_record_begin (void) | |
3719 | { | |
671e76cc | 3720 | current_target.to_goto_record_begin (¤t_target); |
d02ed0bb MM |
3721 | } |
3722 | ||
3723 | /* See target.h. */ | |
3724 | ||
3725 | void | |
3726 | target_goto_record_end (void) | |
3727 | { | |
e9179bb3 | 3728 | current_target.to_goto_record_end (¤t_target); |
d02ed0bb MM |
3729 | } |
3730 | ||
3731 | /* See target.h. */ | |
3732 | ||
3733 | void | |
3734 | target_goto_record (ULONGEST insn) | |
3735 | { | |
05969c84 | 3736 | current_target.to_goto_record (¤t_target, insn); |
d02ed0bb MM |
3737 | } |
3738 | ||
67c86d06 MM |
3739 | /* See target.h. */ |
3740 | ||
3741 | void | |
9a24775b | 3742 | target_insn_history (int size, gdb_disassembly_flags flags) |
67c86d06 | 3743 | { |
3679abfa | 3744 | current_target.to_insn_history (¤t_target, size, flags); |
67c86d06 MM |
3745 | } |
3746 | ||
3747 | /* See target.h. */ | |
3748 | ||
3749 | void | |
9a24775b PA |
3750 | target_insn_history_from (ULONGEST from, int size, |
3751 | gdb_disassembly_flags flags) | |
67c86d06 | 3752 | { |
8444ab58 | 3753 | current_target.to_insn_history_from (¤t_target, from, size, flags); |
67c86d06 MM |
3754 | } |
3755 | ||
3756 | /* See target.h. */ | |
3757 | ||
3758 | void | |
9a24775b PA |
3759 | target_insn_history_range (ULONGEST begin, ULONGEST end, |
3760 | gdb_disassembly_flags flags) | |
67c86d06 | 3761 | { |
c29302cc | 3762 | current_target.to_insn_history_range (¤t_target, begin, end, flags); |
67c86d06 MM |
3763 | } |
3764 | ||
15984c13 MM |
3765 | /* See target.h. */ |
3766 | ||
3767 | void | |
3768 | target_call_history (int size, int flags) | |
3769 | { | |
170049d4 | 3770 | current_target.to_call_history (¤t_target, size, flags); |
15984c13 MM |
3771 | } |
3772 | ||
3773 | /* See target.h. */ | |
3774 | ||
3775 | void | |
3776 | target_call_history_from (ULONGEST begin, int size, int flags) | |
3777 | { | |
16fc27d6 | 3778 | current_target.to_call_history_from (¤t_target, begin, size, flags); |
15984c13 MM |
3779 | } |
3780 | ||
3781 | /* See target.h. */ | |
3782 | ||
3783 | void | |
3784 | target_call_history_range (ULONGEST begin, ULONGEST end, int flags) | |
3785 | { | |
115d9817 | 3786 | current_target.to_call_history_range (¤t_target, begin, end, flags); |
15984c13 MM |
3787 | } |
3788 | ||
ea001bdc MM |
3789 | /* See target.h. */ |
3790 | ||
3791 | const struct frame_unwind * | |
3792 | target_get_unwinder (void) | |
3793 | { | |
ac01945b | 3794 | return current_target.to_get_unwinder (¤t_target); |
ea001bdc MM |
3795 | } |
3796 | ||
3797 | /* See target.h. */ | |
3798 | ||
3799 | const struct frame_unwind * | |
3800 | target_get_tailcall_unwinder (void) | |
3801 | { | |
ac01945b | 3802 | return current_target.to_get_tailcall_unwinder (¤t_target); |
ea001bdc MM |
3803 | } |
3804 | ||
5fff78c4 MM |
3805 | /* See target.h. */ |
3806 | ||
3807 | void | |
3808 | target_prepare_to_generate_core (void) | |
3809 | { | |
3810 | current_target.to_prepare_to_generate_core (¤t_target); | |
3811 | } | |
3812 | ||
3813 | /* See target.h. */ | |
3814 | ||
3815 | void | |
3816 | target_done_generating_core (void) | |
3817 | { | |
3818 | current_target.to_done_generating_core (¤t_target); | |
3819 | } | |
3820 | ||
c906108c | 3821 | static void |
fba45db2 | 3822 | setup_target_debug (void) |
c906108c SS |
3823 | { |
3824 | memcpy (&debug_target, ¤t_target, sizeof debug_target); | |
3825 | ||
a7068b60 | 3826 | init_debug_target (¤t_target); |
c906108c | 3827 | } |
c906108c | 3828 | \f |
c5aa993b JM |
3829 | |
3830 | static char targ_desc[] = | |
3e43a32a MS |
3831 | "Names of targets and files being debugged.\nShows the entire \ |
3832 | stack of targets currently in use (including the exec-file,\n\ | |
c906108c SS |
3833 | core-file, and process, if any), as well as the symbol file name."; |
3834 | ||
a53f3625 | 3835 | static void |
a30bf1f1 TT |
3836 | default_rcmd (struct target_ops *self, const char *command, |
3837 | struct ui_file *output) | |
a53f3625 TT |
3838 | { |
3839 | error (_("\"monitor\" command not supported by this target.")); | |
3840 | } | |
3841 | ||
96baa820 JM |
3842 | static void |
3843 | do_monitor_command (char *cmd, | |
3844 | int from_tty) | |
3845 | { | |
96baa820 JM |
3846 | target_rcmd (cmd, gdb_stdtarg); |
3847 | } | |
3848 | ||
78cbbba8 LM |
3849 | /* Erases all the memory regions marked as flash. CMD and FROM_TTY are |
3850 | ignored. */ | |
3851 | ||
3852 | void | |
3853 | flash_erase_command (char *cmd, int from_tty) | |
3854 | { | |
3855 | /* Used to communicate termination of flash operations to the target. */ | |
3856 | bool found_flash_region = false; | |
3857 | struct mem_region *m; | |
3858 | struct gdbarch *gdbarch = target_gdbarch (); | |
3859 | ||
3860 | VEC(mem_region_s) *mem_regions = target_memory_map (); | |
3861 | ||
3862 | /* Iterate over all memory regions. */ | |
3863 | for (int i = 0; VEC_iterate (mem_region_s, mem_regions, i, m); i++) | |
3864 | { | |
3865 | /* Fetch the memory attribute. */ | |
3866 | struct mem_attrib *attrib = &m->attrib; | |
3867 | ||
3868 | /* Is this a flash memory region? */ | |
3869 | if (attrib->mode == MEM_FLASH) | |
3870 | { | |
3871 | found_flash_region = true; | |
3872 | target_flash_erase (m->lo, m->hi - m->lo); | |
3873 | ||
76f9c9cf | 3874 | ui_out_emit_tuple tuple_emitter (current_uiout, "erased-regions"); |
78cbbba8 LM |
3875 | |
3876 | current_uiout->message (_("Erasing flash memory region at address ")); | |
3877 | current_uiout->field_fmt ("address", "%s", paddress (gdbarch, | |
3878 | m->lo)); | |
3879 | current_uiout->message (", size = "); | |
3880 | current_uiout->field_fmt ("size", "%s", hex_string (m->hi - m->lo)); | |
3881 | current_uiout->message ("\n"); | |
78cbbba8 LM |
3882 | } |
3883 | } | |
3884 | ||
3885 | /* Did we do any flash operations? If so, we need to finalize them. */ | |
3886 | if (found_flash_region) | |
3887 | target_flash_done (); | |
3888 | else | |
3889 | current_uiout->message (_("No flash memory regions found.\n")); | |
3890 | } | |
3891 | ||
87680a14 JB |
3892 | /* Print the name of each layers of our target stack. */ |
3893 | ||
3894 | static void | |
3895 | maintenance_print_target_stack (char *cmd, int from_tty) | |
3896 | { | |
3897 | struct target_ops *t; | |
3898 | ||
3899 | printf_filtered (_("The current target stack is:\n")); | |
3900 | ||
3901 | for (t = target_stack; t != NULL; t = t->beneath) | |
3902 | { | |
3903 | printf_filtered (" - %s (%s)\n", t->to_shortname, t->to_longname); | |
3904 | } | |
3905 | } | |
3906 | ||
372316f1 PA |
3907 | /* See target.h. */ |
3908 | ||
3909 | void | |
3910 | target_async (int enable) | |
3911 | { | |
3912 | infrun_async (enable); | |
3913 | current_target.to_async (¤t_target, enable); | |
3914 | } | |
3915 | ||
65706a29 PA |
3916 | /* See target.h. */ |
3917 | ||
3918 | void | |
3919 | target_thread_events (int enable) | |
3920 | { | |
3921 | current_target.to_thread_events (¤t_target, enable); | |
3922 | } | |
3923 | ||
329ea579 PA |
3924 | /* Controls if targets can report that they can/are async. This is |
3925 | just for maintainers to use when debugging gdb. */ | |
3926 | int target_async_permitted = 1; | |
c6ebd6cf VP |
3927 | |
3928 | /* The set command writes to this variable. If the inferior is | |
b5419e49 | 3929 | executing, target_async_permitted is *not* updated. */ |
329ea579 | 3930 | static int target_async_permitted_1 = 1; |
c6ebd6cf VP |
3931 | |
3932 | static void | |
329ea579 PA |
3933 | maint_set_target_async_command (char *args, int from_tty, |
3934 | struct cmd_list_element *c) | |
c6ebd6cf | 3935 | { |
c35b1492 | 3936 | if (have_live_inferiors ()) |
c6ebd6cf VP |
3937 | { |
3938 | target_async_permitted_1 = target_async_permitted; | |
3939 | error (_("Cannot change this setting while the inferior is running.")); | |
3940 | } | |
3941 | ||
3942 | target_async_permitted = target_async_permitted_1; | |
3943 | } | |
3944 | ||
3945 | static void | |
329ea579 PA |
3946 | maint_show_target_async_command (struct ui_file *file, int from_tty, |
3947 | struct cmd_list_element *c, | |
3948 | const char *value) | |
c6ebd6cf | 3949 | { |
3e43a32a MS |
3950 | fprintf_filtered (file, |
3951 | _("Controlling the inferior in " | |
3952 | "asynchronous mode is %s.\n"), value); | |
c6ebd6cf VP |
3953 | } |
3954 | ||
fbea99ea PA |
3955 | /* Return true if the target operates in non-stop mode even with "set |
3956 | non-stop off". */ | |
3957 | ||
3958 | static int | |
3959 | target_always_non_stop_p (void) | |
3960 | { | |
3961 | return current_target.to_always_non_stop_p (¤t_target); | |
3962 | } | |
3963 | ||
3964 | /* See target.h. */ | |
3965 | ||
3966 | int | |
3967 | target_is_non_stop_p (void) | |
3968 | { | |
3969 | return (non_stop | |
3970 | || target_non_stop_enabled == AUTO_BOOLEAN_TRUE | |
3971 | || (target_non_stop_enabled == AUTO_BOOLEAN_AUTO | |
3972 | && target_always_non_stop_p ())); | |
3973 | } | |
3974 | ||
3975 | /* Controls if targets can report that they always run in non-stop | |
3976 | mode. This is just for maintainers to use when debugging gdb. */ | |
3977 | enum auto_boolean target_non_stop_enabled = AUTO_BOOLEAN_AUTO; | |
3978 | ||
3979 | /* The set command writes to this variable. If the inferior is | |
3980 | executing, target_non_stop_enabled is *not* updated. */ | |
3981 | static enum auto_boolean target_non_stop_enabled_1 = AUTO_BOOLEAN_AUTO; | |
3982 | ||
3983 | /* Implementation of "maint set target-non-stop". */ | |
3984 | ||
3985 | static void | |
3986 | maint_set_target_non_stop_command (char *args, int from_tty, | |
3987 | struct cmd_list_element *c) | |
3988 | { | |
3989 | if (have_live_inferiors ()) | |
3990 | { | |
3991 | target_non_stop_enabled_1 = target_non_stop_enabled; | |
3992 | error (_("Cannot change this setting while the inferior is running.")); | |
3993 | } | |
3994 | ||
3995 | target_non_stop_enabled = target_non_stop_enabled_1; | |
3996 | } | |
3997 | ||
3998 | /* Implementation of "maint show target-non-stop". */ | |
3999 | ||
4000 | static void | |
4001 | maint_show_target_non_stop_command (struct ui_file *file, int from_tty, | |
4002 | struct cmd_list_element *c, | |
4003 | const char *value) | |
4004 | { | |
4005 | if (target_non_stop_enabled == AUTO_BOOLEAN_AUTO) | |
4006 | fprintf_filtered (file, | |
4007 | _("Whether the target is always in non-stop mode " | |
4008 | "is %s (currently %s).\n"), value, | |
4009 | target_always_non_stop_p () ? "on" : "off"); | |
4010 | else | |
4011 | fprintf_filtered (file, | |
4012 | _("Whether the target is always in non-stop mode " | |
4013 | "is %s.\n"), value); | |
4014 | } | |
4015 | ||
d914c394 SS |
4016 | /* Temporary copies of permission settings. */ |
4017 | ||
4018 | static int may_write_registers_1 = 1; | |
4019 | static int may_write_memory_1 = 1; | |
4020 | static int may_insert_breakpoints_1 = 1; | |
4021 | static int may_insert_tracepoints_1 = 1; | |
4022 | static int may_insert_fast_tracepoints_1 = 1; | |
4023 | static int may_stop_1 = 1; | |
4024 | ||
4025 | /* Make the user-set values match the real values again. */ | |
4026 | ||
4027 | void | |
4028 | update_target_permissions (void) | |
4029 | { | |
4030 | may_write_registers_1 = may_write_registers; | |
4031 | may_write_memory_1 = may_write_memory; | |
4032 | may_insert_breakpoints_1 = may_insert_breakpoints; | |
4033 | may_insert_tracepoints_1 = may_insert_tracepoints; | |
4034 | may_insert_fast_tracepoints_1 = may_insert_fast_tracepoints; | |
4035 | may_stop_1 = may_stop; | |
4036 | } | |
4037 | ||
4038 | /* The one function handles (most of) the permission flags in the same | |
4039 | way. */ | |
4040 | ||
4041 | static void | |
4042 | set_target_permissions (char *args, int from_tty, | |
4043 | struct cmd_list_element *c) | |
4044 | { | |
4045 | if (target_has_execution) | |
4046 | { | |
4047 | update_target_permissions (); | |
4048 | error (_("Cannot change this setting while the inferior is running.")); | |
4049 | } | |
4050 | ||
4051 | /* Make the real values match the user-changed values. */ | |
4052 | may_write_registers = may_write_registers_1; | |
4053 | may_insert_breakpoints = may_insert_breakpoints_1; | |
4054 | may_insert_tracepoints = may_insert_tracepoints_1; | |
4055 | may_insert_fast_tracepoints = may_insert_fast_tracepoints_1; | |
4056 | may_stop = may_stop_1; | |
4057 | update_observer_mode (); | |
4058 | } | |
4059 | ||
4060 | /* Set memory write permission independently of observer mode. */ | |
4061 | ||
4062 | static void | |
4063 | set_write_memory_permission (char *args, int from_tty, | |
4064 | struct cmd_list_element *c) | |
4065 | { | |
4066 | /* Make the real values match the user-changed values. */ | |
4067 | may_write_memory = may_write_memory_1; | |
4068 | update_observer_mode (); | |
4069 | } | |
4070 | ||
4071 | ||
c906108c | 4072 | void |
fba45db2 | 4073 | initialize_targets (void) |
c906108c SS |
4074 | { |
4075 | init_dummy_target (); | |
4076 | push_target (&dummy_target); | |
4077 | ||
11db9430 SM |
4078 | add_info ("target", info_target_command, targ_desc); |
4079 | add_info ("files", info_target_command, targ_desc); | |
c906108c | 4080 | |
ccce17b0 | 4081 | add_setshow_zuinteger_cmd ("target", class_maintenance, &targetdebug, _("\ |
85c07804 AC |
4082 | Set target debugging."), _("\ |
4083 | Show target debugging."), _("\ | |
333dabeb | 4084 | When non-zero, target debugging is enabled. Higher numbers are more\n\ |
3cecbbbe TT |
4085 | verbose."), |
4086 | set_targetdebug, | |
ccce17b0 YQ |
4087 | show_targetdebug, |
4088 | &setdebuglist, &showdebuglist); | |
3a11626d | 4089 | |
2bc416ba | 4090 | add_setshow_boolean_cmd ("trust-readonly-sections", class_support, |
7915a72c AC |
4091 | &trust_readonly, _("\ |
4092 | Set mode for reading from readonly sections."), _("\ | |
4093 | Show mode for reading from readonly sections."), _("\ | |
3a11626d MS |
4094 | When this mode is on, memory reads from readonly sections (such as .text)\n\ |
4095 | will be read from the object file instead of from the target. This will\n\ | |
7915a72c | 4096 | result in significant performance improvement for remote targets."), |
2c5b56ce | 4097 | NULL, |
920d2a44 | 4098 | show_trust_readonly, |
e707bbc2 | 4099 | &setlist, &showlist); |
96baa820 JM |
4100 | |
4101 | add_com ("monitor", class_obscure, do_monitor_command, | |
1bedd215 | 4102 | _("Send a command to the remote monitor (remote targets only).")); |
96baa820 | 4103 | |
87680a14 JB |
4104 | add_cmd ("target-stack", class_maintenance, maintenance_print_target_stack, |
4105 | _("Print the name of each layer of the internal target stack."), | |
4106 | &maintenanceprintlist); | |
4107 | ||
c6ebd6cf VP |
4108 | add_setshow_boolean_cmd ("target-async", no_class, |
4109 | &target_async_permitted_1, _("\ | |
4110 | Set whether gdb controls the inferior in asynchronous mode."), _("\ | |
4111 | Show whether gdb controls the inferior in asynchronous mode."), _("\ | |
4112 | Tells gdb whether to control the inferior in asynchronous mode."), | |
329ea579 PA |
4113 | maint_set_target_async_command, |
4114 | maint_show_target_async_command, | |
4115 | &maintenance_set_cmdlist, | |
4116 | &maintenance_show_cmdlist); | |
c6ebd6cf | 4117 | |
fbea99ea PA |
4118 | add_setshow_auto_boolean_cmd ("target-non-stop", no_class, |
4119 | &target_non_stop_enabled_1, _("\ | |
4120 | Set whether gdb always controls the inferior in non-stop mode."), _("\ | |
4121 | Show whether gdb always controls the inferior in non-stop mode."), _("\ | |
4122 | Tells gdb whether to control the inferior in non-stop mode."), | |
4123 | maint_set_target_non_stop_command, | |
4124 | maint_show_target_non_stop_command, | |
4125 | &maintenance_set_cmdlist, | |
4126 | &maintenance_show_cmdlist); | |
4127 | ||
d914c394 SS |
4128 | add_setshow_boolean_cmd ("may-write-registers", class_support, |
4129 | &may_write_registers_1, _("\ | |
4130 | Set permission to write into registers."), _("\ | |
4131 | Show permission to write into registers."), _("\ | |
4132 | When this permission is on, GDB may write into the target's registers.\n\ | |
4133 | Otherwise, any sort of write attempt will result in an error."), | |
4134 | set_target_permissions, NULL, | |
4135 | &setlist, &showlist); | |
4136 | ||
4137 | add_setshow_boolean_cmd ("may-write-memory", class_support, | |
4138 | &may_write_memory_1, _("\ | |
4139 | Set permission to write into target memory."), _("\ | |
4140 | Show permission to write into target memory."), _("\ | |
4141 | When this permission is on, GDB may write into the target's memory.\n\ | |
4142 | Otherwise, any sort of write attempt will result in an error."), | |
4143 | set_write_memory_permission, NULL, | |
4144 | &setlist, &showlist); | |
4145 | ||
4146 | add_setshow_boolean_cmd ("may-insert-breakpoints", class_support, | |
4147 | &may_insert_breakpoints_1, _("\ | |
4148 | Set permission to insert breakpoints in the target."), _("\ | |
4149 | Show permission to insert breakpoints in the target."), _("\ | |
4150 | When this permission is on, GDB may insert breakpoints in the program.\n\ | |
4151 | Otherwise, any sort of insertion attempt will result in an error."), | |
4152 | set_target_permissions, NULL, | |
4153 | &setlist, &showlist); | |
4154 | ||
4155 | add_setshow_boolean_cmd ("may-insert-tracepoints", class_support, | |
4156 | &may_insert_tracepoints_1, _("\ | |
4157 | Set permission to insert tracepoints in the target."), _("\ | |
4158 | Show permission to insert tracepoints in the target."), _("\ | |
4159 | When this permission is on, GDB may insert tracepoints in the program.\n\ | |
4160 | Otherwise, any sort of insertion attempt will result in an error."), | |
4161 | set_target_permissions, NULL, | |
4162 | &setlist, &showlist); | |
4163 | ||
4164 | add_setshow_boolean_cmd ("may-insert-fast-tracepoints", class_support, | |
4165 | &may_insert_fast_tracepoints_1, _("\ | |
4166 | Set permission to insert fast tracepoints in the target."), _("\ | |
4167 | Show permission to insert fast tracepoints in the target."), _("\ | |
4168 | When this permission is on, GDB may insert fast tracepoints.\n\ | |
4169 | Otherwise, any sort of insertion attempt will result in an error."), | |
4170 | set_target_permissions, NULL, | |
4171 | &setlist, &showlist); | |
4172 | ||
4173 | add_setshow_boolean_cmd ("may-interrupt", class_support, | |
4174 | &may_stop_1, _("\ | |
4175 | Set permission to interrupt or signal the target."), _("\ | |
4176 | Show permission to interrupt or signal the target."), _("\ | |
4177 | When this permission is on, GDB may interrupt/stop the target's execution.\n\ | |
4178 | Otherwise, any attempt to interrupt or stop will be ignored."), | |
4179 | set_target_permissions, NULL, | |
4180 | &setlist, &showlist); | |
6a3cb8e8 | 4181 | |
78cbbba8 LM |
4182 | add_com ("flash-erase", no_class, flash_erase_command, |
4183 | _("Erase all flash memory regions.")); | |
4184 | ||
6a3cb8e8 PA |
4185 | add_setshow_boolean_cmd ("auto-connect-native-target", class_support, |
4186 | &auto_connect_native_target, _("\ | |
4187 | Set whether GDB may automatically connect to the native target."), _("\ | |
4188 | Show whether GDB may automatically connect to the native target."), _("\ | |
4189 | When on, and GDB is not connected to a target yet, GDB\n\ | |
4190 | attempts \"run\" and other commands with the native target."), | |
4191 | NULL, show_auto_connect_native_target, | |
4192 | &setlist, &showlist); | |
c906108c | 4193 | } |