Commit | Line | Data |
---|---|---|
c906108c | 1 | /* Select target systems and architectures at runtime for GDB. |
7998dfc3 | 2 | |
e2882c85 | 3 | Copyright (C) 1990-2018 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 | |
f0f9ff95 TT |
51 | static void generic_tls_error (void) ATTRIBUTE_NORETURN; |
52 | ||
0a4f40a2 | 53 | static void default_terminal_info (struct target_ops *, const char *, int); |
c906108c | 54 | |
5009afc5 AS |
55 | static int default_watchpoint_addr_within_range (struct target_ops *, |
56 | CORE_ADDR, CORE_ADDR, int); | |
57 | ||
31568a15 TT |
58 | static int default_region_ok_for_hw_watchpoint (struct target_ops *, |
59 | CORE_ADDR, int); | |
e0d24f8d | 60 | |
a30bf1f1 | 61 | static void default_rcmd (struct target_ops *, const char *, struct ui_file *); |
a53f3625 | 62 | |
4229b31d TT |
63 | static ptid_t default_get_ada_task_ptid (struct target_ops *self, |
64 | long lwp, long tid); | |
65 | ||
098dba18 TT |
66 | static int default_follow_fork (struct target_ops *self, int follow_child, |
67 | int detach_fork); | |
68 | ||
8d657035 TT |
69 | static void default_mourn_inferior (struct target_ops *self); |
70 | ||
58a5184e TT |
71 | static int default_search_memory (struct target_ops *ops, |
72 | CORE_ADDR start_addr, | |
73 | ULONGEST search_space_len, | |
74 | const gdb_byte *pattern, | |
75 | ULONGEST pattern_len, | |
76 | CORE_ADDR *found_addrp); | |
77 | ||
936d2992 PA |
78 | static int default_verify_memory (struct target_ops *self, |
79 | const gdb_byte *data, | |
80 | CORE_ADDR memaddr, ULONGEST size); | |
81 | ||
8eaff7cd TT |
82 | static struct address_space *default_thread_address_space |
83 | (struct target_ops *self, ptid_t ptid); | |
84 | ||
c25c4a8b | 85 | static void tcomplain (void) ATTRIBUTE_NORETURN; |
c906108c | 86 | |
555bbdeb TT |
87 | static int return_zero (struct target_ops *); |
88 | ||
89 | static int return_zero_has_execution (struct target_ops *, ptid_t); | |
c906108c | 90 | |
a121b7c1 | 91 | static struct target_ops *find_default_run_target (const char *); |
c906108c | 92 | |
c2250ad1 UW |
93 | static struct gdbarch *default_thread_architecture (struct target_ops *ops, |
94 | ptid_t ptid); | |
95 | ||
0b5a2719 TT |
96 | static int dummy_find_memory_regions (struct target_ops *self, |
97 | find_memory_region_ftype ignore1, | |
98 | void *ignore2); | |
99 | ||
16f796b1 TT |
100 | static char *dummy_make_corefile_notes (struct target_ops *self, |
101 | bfd *ignore1, int *ignore2); | |
102 | ||
7a114964 | 103 | static const char *default_pid_to_str (struct target_ops *ops, ptid_t ptid); |
770234d3 | 104 | |
fe31bf5b TT |
105 | static enum exec_direction_kind default_execution_direction |
106 | (struct target_ops *self); | |
107 | ||
a7068b60 TT |
108 | static struct target_ops debug_target; |
109 | ||
1101cb7b TT |
110 | #include "target-delegates.c" |
111 | ||
a14ed312 | 112 | static void init_dummy_target (void); |
c906108c | 113 | |
3cecbbbe TT |
114 | static void update_current_target (void); |
115 | ||
89a1c21a SM |
116 | /* Vector of existing target structures. */ |
117 | typedef struct target_ops *target_ops_p; | |
118 | DEF_VEC_P (target_ops_p); | |
119 | static VEC (target_ops_p) *target_structs; | |
c906108c SS |
120 | |
121 | /* The initial current target, so that there is always a semi-valid | |
122 | current target. */ | |
123 | ||
124 | static struct target_ops dummy_target; | |
125 | ||
126 | /* Top of target stack. */ | |
127 | ||
258b763a | 128 | static struct target_ops *target_stack; |
c906108c SS |
129 | |
130 | /* The target structure we are currently using to talk to a process | |
131 | or file or whatever "inferior" we have. */ | |
132 | ||
133 | struct target_ops current_target; | |
134 | ||
135 | /* Command list for target. */ | |
136 | ||
137 | static struct cmd_list_element *targetlist = NULL; | |
138 | ||
cf7a04e8 DJ |
139 | /* Nonzero if we should trust readonly sections from the |
140 | executable when reading memory. */ | |
141 | ||
142 | static int trust_readonly = 0; | |
143 | ||
8defab1a DJ |
144 | /* Nonzero if we should show true memory content including |
145 | memory breakpoint inserted by gdb. */ | |
146 | ||
147 | static int show_memory_breakpoints = 0; | |
148 | ||
d914c394 SS |
149 | /* These globals control whether GDB attempts to perform these |
150 | operations; they are useful for targets that need to prevent | |
151 | inadvertant disruption, such as in non-stop mode. */ | |
152 | ||
153 | int may_write_registers = 1; | |
154 | ||
155 | int may_write_memory = 1; | |
156 | ||
157 | int may_insert_breakpoints = 1; | |
158 | ||
159 | int may_insert_tracepoints = 1; | |
160 | ||
161 | int may_insert_fast_tracepoints = 1; | |
162 | ||
163 | int may_stop = 1; | |
164 | ||
c906108c SS |
165 | /* Non-zero if we want to see trace of target level stuff. */ |
166 | ||
ccce17b0 | 167 | static unsigned int targetdebug = 0; |
3cecbbbe TT |
168 | |
169 | static void | |
eb4c3f4a | 170 | set_targetdebug (const char *args, int from_tty, struct cmd_list_element *c) |
3cecbbbe TT |
171 | { |
172 | update_current_target (); | |
173 | } | |
174 | ||
920d2a44 AC |
175 | static void |
176 | show_targetdebug (struct ui_file *file, int from_tty, | |
177 | struct cmd_list_element *c, const char *value) | |
178 | { | |
179 | fprintf_filtered (file, _("Target debugging is %s.\n"), value); | |
180 | } | |
c906108c | 181 | |
a14ed312 | 182 | static void setup_target_debug (void); |
c906108c | 183 | |
c906108c SS |
184 | /* The user just typed 'target' without the name of a target. */ |
185 | ||
c906108c | 186 | static void |
981a3fb3 | 187 | target_command (const char *arg, int from_tty) |
c906108c SS |
188 | { |
189 | fputs_filtered ("Argument required (target name). Try `help target'\n", | |
190 | gdb_stdout); | |
191 | } | |
192 | ||
c35b1492 PA |
193 | /* Default target_has_* methods for process_stratum targets. */ |
194 | ||
195 | int | |
196 | default_child_has_all_memory (struct target_ops *ops) | |
197 | { | |
198 | /* If no inferior selected, then we can't read memory here. */ | |
199 | if (ptid_equal (inferior_ptid, null_ptid)) | |
200 | return 0; | |
201 | ||
202 | return 1; | |
203 | } | |
204 | ||
205 | int | |
206 | default_child_has_memory (struct target_ops *ops) | |
207 | { | |
208 | /* If no inferior selected, then we can't read memory here. */ | |
209 | if (ptid_equal (inferior_ptid, null_ptid)) | |
210 | return 0; | |
211 | ||
212 | return 1; | |
213 | } | |
214 | ||
215 | int | |
216 | default_child_has_stack (struct target_ops *ops) | |
217 | { | |
218 | /* If no inferior selected, there's no stack. */ | |
219 | if (ptid_equal (inferior_ptid, null_ptid)) | |
220 | return 0; | |
221 | ||
222 | return 1; | |
223 | } | |
224 | ||
225 | int | |
226 | default_child_has_registers (struct target_ops *ops) | |
227 | { | |
228 | /* Can't read registers from no inferior. */ | |
229 | if (ptid_equal (inferior_ptid, null_ptid)) | |
230 | return 0; | |
231 | ||
232 | return 1; | |
233 | } | |
234 | ||
235 | int | |
aeaec162 | 236 | default_child_has_execution (struct target_ops *ops, ptid_t the_ptid) |
c35b1492 PA |
237 | { |
238 | /* If there's no thread selected, then we can't make it run through | |
239 | hoops. */ | |
aeaec162 | 240 | if (ptid_equal (the_ptid, null_ptid)) |
c35b1492 PA |
241 | return 0; |
242 | ||
243 | return 1; | |
244 | } | |
245 | ||
246 | ||
247 | int | |
248 | target_has_all_memory_1 (void) | |
249 | { | |
250 | struct target_ops *t; | |
251 | ||
252 | for (t = current_target.beneath; t != NULL; t = t->beneath) | |
253 | if (t->to_has_all_memory (t)) | |
254 | return 1; | |
255 | ||
256 | return 0; | |
257 | } | |
258 | ||
259 | int | |
260 | target_has_memory_1 (void) | |
261 | { | |
262 | struct target_ops *t; | |
263 | ||
264 | for (t = current_target.beneath; t != NULL; t = t->beneath) | |
265 | if (t->to_has_memory (t)) | |
266 | return 1; | |
267 | ||
268 | return 0; | |
269 | } | |
270 | ||
271 | int | |
272 | target_has_stack_1 (void) | |
273 | { | |
274 | struct target_ops *t; | |
275 | ||
276 | for (t = current_target.beneath; t != NULL; t = t->beneath) | |
277 | if (t->to_has_stack (t)) | |
278 | return 1; | |
279 | ||
280 | return 0; | |
281 | } | |
282 | ||
283 | int | |
284 | target_has_registers_1 (void) | |
285 | { | |
286 | struct target_ops *t; | |
287 | ||
288 | for (t = current_target.beneath; t != NULL; t = t->beneath) | |
289 | if (t->to_has_registers (t)) | |
290 | return 1; | |
291 | ||
292 | return 0; | |
293 | } | |
294 | ||
295 | int | |
aeaec162 | 296 | target_has_execution_1 (ptid_t the_ptid) |
c35b1492 PA |
297 | { |
298 | struct target_ops *t; | |
299 | ||
300 | for (t = current_target.beneath; t != NULL; t = t->beneath) | |
aeaec162 | 301 | if (t->to_has_execution (t, the_ptid)) |
c35b1492 PA |
302 | return 1; |
303 | ||
304 | return 0; | |
305 | } | |
306 | ||
aeaec162 TT |
307 | int |
308 | target_has_execution_current (void) | |
309 | { | |
310 | return target_has_execution_1 (inferior_ptid); | |
311 | } | |
312 | ||
c22a2b88 TT |
313 | /* Complete initialization of T. This ensures that various fields in |
314 | T are set, if needed by the target implementation. */ | |
c906108c SS |
315 | |
316 | void | |
c22a2b88 | 317 | complete_target_initialization (struct target_ops *t) |
c906108c | 318 | { |
0088c768 | 319 | /* Provide default values for all "must have" methods. */ |
0088c768 | 320 | |
c35b1492 | 321 | if (t->to_has_all_memory == NULL) |
555bbdeb | 322 | t->to_has_all_memory = return_zero; |
c35b1492 PA |
323 | |
324 | if (t->to_has_memory == NULL) | |
555bbdeb | 325 | t->to_has_memory = return_zero; |
c35b1492 PA |
326 | |
327 | if (t->to_has_stack == NULL) | |
555bbdeb | 328 | t->to_has_stack = return_zero; |
c35b1492 PA |
329 | |
330 | if (t->to_has_registers == NULL) | |
555bbdeb | 331 | t->to_has_registers = return_zero; |
c35b1492 PA |
332 | |
333 | if (t->to_has_execution == NULL) | |
555bbdeb | 334 | t->to_has_execution = return_zero_has_execution; |
1101cb7b | 335 | |
b3ccfe11 TT |
336 | /* These methods can be called on an unpushed target and so require |
337 | a default implementation if the target might plausibly be the | |
338 | default run target. */ | |
339 | gdb_assert (t->to_can_run == NULL || (t->to_can_async_p != NULL | |
340 | && t->to_supports_non_stop != NULL)); | |
341 | ||
1101cb7b | 342 | install_delegators (t); |
c22a2b88 TT |
343 | } |
344 | ||
8981c758 TT |
345 | /* This is used to implement the various target commands. */ |
346 | ||
347 | static void | |
eb4c3f4a | 348 | open_target (const char *args, int from_tty, struct cmd_list_element *command) |
8981c758 | 349 | { |
19ba03f4 | 350 | struct target_ops *ops = (struct target_ops *) get_cmd_context (command); |
8981c758 TT |
351 | |
352 | if (targetdebug) | |
353 | fprintf_unfiltered (gdb_stdlog, "-> %s->to_open (...)\n", | |
354 | ops->to_shortname); | |
355 | ||
356 | ops->to_open (args, from_tty); | |
357 | ||
358 | if (targetdebug) | |
359 | fprintf_unfiltered (gdb_stdlog, "<- %s->to_open (%s, %d)\n", | |
360 | ops->to_shortname, args, from_tty); | |
361 | } | |
362 | ||
c22a2b88 TT |
363 | /* Add possible target architecture T to the list and add a new |
364 | command 'target T->to_shortname'. Set COMPLETER as the command's | |
365 | completer if not NULL. */ | |
366 | ||
367 | void | |
368 | add_target_with_completer (struct target_ops *t, | |
369 | completer_ftype *completer) | |
370 | { | |
371 | struct cmd_list_element *c; | |
372 | ||
373 | complete_target_initialization (t); | |
c35b1492 | 374 | |
89a1c21a | 375 | VEC_safe_push (target_ops_p, target_structs, t); |
c906108c SS |
376 | |
377 | if (targetlist == NULL) | |
1bedd215 AC |
378 | add_prefix_cmd ("target", class_run, target_command, _("\ |
379 | Connect to a target machine or process.\n\ | |
c906108c SS |
380 | The first argument is the type or protocol of the target machine.\n\ |
381 | Remaining arguments are interpreted by the target protocol. For more\n\ | |
382 | information on the arguments for a particular protocol, type\n\ | |
1bedd215 | 383 | `help target ' followed by the protocol name."), |
c906108c | 384 | &targetlist, "target ", 0, &cmdlist); |
0450cc4c | 385 | c = add_cmd (t->to_shortname, no_class, t->to_doc, &targetlist); |
8981c758 TT |
386 | set_cmd_sfunc (c, open_target); |
387 | set_cmd_context (c, t); | |
9852c492 YQ |
388 | if (completer != NULL) |
389 | set_cmd_completer (c, completer); | |
390 | } | |
391 | ||
392 | /* Add a possible target architecture to the list. */ | |
393 | ||
394 | void | |
395 | add_target (struct target_ops *t) | |
396 | { | |
397 | add_target_with_completer (t, NULL); | |
c906108c SS |
398 | } |
399 | ||
b48d48eb MM |
400 | /* See target.h. */ |
401 | ||
402 | void | |
a121b7c1 | 403 | add_deprecated_target_alias (struct target_ops *t, const char *alias) |
b48d48eb MM |
404 | { |
405 | struct cmd_list_element *c; | |
406 | char *alt; | |
407 | ||
408 | /* If we use add_alias_cmd, here, we do not get the deprecated warning, | |
409 | see PR cli/15104. */ | |
0450cc4c | 410 | c = add_cmd (alias, no_class, t->to_doc, &targetlist); |
8981c758 TT |
411 | set_cmd_sfunc (c, open_target); |
412 | set_cmd_context (c, t); | |
b48d48eb MM |
413 | alt = xstrprintf ("target %s", t->to_shortname); |
414 | deprecate_cmd (c, alt); | |
415 | } | |
416 | ||
c906108c SS |
417 | /* Stub functions */ |
418 | ||
7d85a9c0 JB |
419 | void |
420 | target_kill (void) | |
421 | { | |
423a4807 | 422 | current_target.to_kill (¤t_target); |
7d85a9c0 JB |
423 | } |
424 | ||
11cf8741 | 425 | void |
9cbe5fff | 426 | target_load (const char *arg, int from_tty) |
11cf8741 | 427 | { |
4e5d721f | 428 | target_dcache_invalidate (); |
71a9f134 | 429 | (*current_target.to_load) (¤t_target, arg, from_tty); |
11cf8741 JM |
430 | } |
431 | ||
223ffa71 | 432 | /* Define it. */ |
5842f62a | 433 | |
223ffa71 TT |
434 | enum target_terminal::terminal_state target_terminal::terminal_state |
435 | = target_terminal::terminal_is_ours; | |
5842f62a | 436 | |
223ffa71 | 437 | /* See target/target.h. */ |
5842f62a PA |
438 | |
439 | void | |
223ffa71 | 440 | target_terminal::init (void) |
5842f62a PA |
441 | { |
442 | (*current_target.to_terminal_init) (¤t_target); | |
443 | ||
444 | terminal_state = terminal_is_ours; | |
445 | } | |
446 | ||
223ffa71 | 447 | /* See target/target.h. */ |
2f99e8fc | 448 | |
d9d2d8b6 | 449 | void |
223ffa71 | 450 | target_terminal::inferior (void) |
d9d2d8b6 | 451 | { |
41fd2b0f PA |
452 | struct ui *ui = current_ui; |
453 | ||
d9d2d8b6 | 454 | /* A background resume (``run&'') should leave GDB in control of the |
3b12939d PA |
455 | terminal. */ |
456 | if (ui->prompt_state != PROMPT_BLOCKED) | |
d9d2d8b6 PA |
457 | return; |
458 | ||
215d3118 PA |
459 | /* Since we always run the inferior in the main console (unless "set |
460 | inferior-tty" is in effect), when some UI other than the main one | |
223ffa71 TT |
461 | calls target_terminal::inferior, then we leave the main UI's |
462 | terminal settings as is. */ | |
215d3118 PA |
463 | if (ui != main_ui) |
464 | return; | |
465 | ||
5842f62a PA |
466 | if (terminal_state == terminal_is_inferior) |
467 | return; | |
468 | ||
d9d2d8b6 PA |
469 | /* If GDB is resuming the inferior in the foreground, install |
470 | inferior's terminal modes. */ | |
d2f640d4 | 471 | (*current_target.to_terminal_inferior) (¤t_target); |
5842f62a | 472 | terminal_state = terminal_is_inferior; |
93692b58 PA |
473 | |
474 | /* If the user hit C-c before, pretend that it was hit right | |
475 | here. */ | |
476 | if (check_quit_flag ()) | |
477 | target_pass_ctrlc (); | |
5842f62a PA |
478 | } |
479 | ||
223ffa71 | 480 | /* See target/target.h. */ |
5842f62a PA |
481 | |
482 | void | |
223ffa71 | 483 | target_terminal::ours () |
5842f62a | 484 | { |
41fd2b0f PA |
485 | struct ui *ui = current_ui; |
486 | ||
223ffa71 | 487 | /* See target_terminal::inferior. */ |
215d3118 PA |
488 | if (ui != main_ui) |
489 | return; | |
490 | ||
5842f62a PA |
491 | if (terminal_state == terminal_is_ours) |
492 | return; | |
493 | ||
494 | (*current_target.to_terminal_ours) (¤t_target); | |
495 | terminal_state = terminal_is_ours; | |
496 | } | |
497 | ||
223ffa71 | 498 | /* See target/target.h. */ |
5842f62a PA |
499 | |
500 | void | |
223ffa71 | 501 | target_terminal::ours_for_output () |
5842f62a | 502 | { |
215d3118 PA |
503 | struct ui *ui = current_ui; |
504 | ||
223ffa71 | 505 | /* See target_terminal::inferior. */ |
215d3118 PA |
506 | if (ui != main_ui) |
507 | return; | |
508 | ||
5842f62a PA |
509 | if (terminal_state != terminal_is_inferior) |
510 | return; | |
511 | (*current_target.to_terminal_ours_for_output) (¤t_target); | |
512 | terminal_state = terminal_is_ours_for_output; | |
d9d2d8b6 | 513 | } |
136d6dae | 514 | |
223ffa71 TT |
515 | /* See target/target.h. */ |
516 | ||
517 | void | |
518 | target_terminal::info (const char *arg, int from_tty) | |
519 | { | |
520 | (*current_target.to_terminal_info) (¤t_target, arg, from_tty); | |
521 | } | |
522 | ||
b0ed115f TT |
523 | /* See target.h. */ |
524 | ||
525 | int | |
526 | target_supports_terminal_ours (void) | |
527 | { | |
528 | struct target_ops *t; | |
529 | ||
530 | for (t = current_target.beneath; t != NULL; t = t->beneath) | |
531 | { | |
532 | if (t->to_terminal_ours != delegate_terminal_ours | |
533 | && t->to_terminal_ours != tdefault_terminal_ours) | |
534 | return 1; | |
535 | } | |
536 | ||
537 | return 0; | |
538 | } | |
539 | ||
c906108c | 540 | static void |
fba45db2 | 541 | tcomplain (void) |
c906108c | 542 | { |
8a3fe4f8 | 543 | error (_("You can't do that when your target is `%s'"), |
c906108c SS |
544 | current_target.to_shortname); |
545 | } | |
546 | ||
547 | void | |
fba45db2 | 548 | noprocess (void) |
c906108c | 549 | { |
8a3fe4f8 | 550 | error (_("You can't do that without a process to debug.")); |
c906108c SS |
551 | } |
552 | ||
c906108c | 553 | static void |
0a4f40a2 | 554 | default_terminal_info (struct target_ops *self, const char *args, int from_tty) |
c906108c | 555 | { |
a3f17187 | 556 | printf_unfiltered (_("No saved terminal information.\n")); |
c906108c SS |
557 | } |
558 | ||
0ef643c8 JB |
559 | /* A default implementation for the to_get_ada_task_ptid target method. |
560 | ||
561 | This function builds the PTID by using both LWP and TID as part of | |
562 | the PTID lwp and tid elements. The pid used is the pid of the | |
563 | inferior_ptid. */ | |
564 | ||
2c0b251b | 565 | static ptid_t |
1e6b91a4 | 566 | default_get_ada_task_ptid (struct target_ops *self, long lwp, long tid) |
0ef643c8 JB |
567 | { |
568 | return ptid_build (ptid_get_pid (inferior_ptid), lwp, tid); | |
569 | } | |
570 | ||
32231432 | 571 | static enum exec_direction_kind |
4c612759 | 572 | default_execution_direction (struct target_ops *self) |
32231432 PA |
573 | { |
574 | if (!target_can_execute_reverse) | |
575 | return EXEC_FORWARD; | |
576 | else if (!target_can_async_p ()) | |
577 | return EXEC_FORWARD; | |
578 | else | |
579 | gdb_assert_not_reached ("\ | |
580 | to_execution_direction must be implemented for reverse async"); | |
581 | } | |
582 | ||
7998dfc3 AC |
583 | /* Go through the target stack from top to bottom, copying over zero |
584 | entries in current_target, then filling in still empty entries. In | |
585 | effect, we are doing class inheritance through the pushed target | |
586 | vectors. | |
587 | ||
588 | NOTE: cagney/2003-10-17: The problem with this inheritance, as it | |
589 | is currently implemented, is that it discards any knowledge of | |
590 | which target an inherited method originally belonged to. | |
591 | Consequently, new new target methods should instead explicitly and | |
592 | locally search the target stack for the target that can handle the | |
593 | request. */ | |
c906108c SS |
594 | |
595 | static void | |
7998dfc3 | 596 | update_current_target (void) |
c906108c | 597 | { |
7998dfc3 AC |
598 | struct target_ops *t; |
599 | ||
08d8bcd7 | 600 | /* First, reset current's contents. */ |
7998dfc3 AC |
601 | memset (¤t_target, 0, sizeof (current_target)); |
602 | ||
1101cb7b TT |
603 | /* Install the delegators. */ |
604 | install_delegators (¤t_target); | |
605 | ||
be4ddd36 TT |
606 | current_target.to_stratum = target_stack->to_stratum; |
607 | ||
7998dfc3 AC |
608 | #define INHERIT(FIELD, TARGET) \ |
609 | if (!current_target.FIELD) \ | |
610 | current_target.FIELD = (TARGET)->FIELD | |
611 | ||
be4ddd36 TT |
612 | /* Do not add any new INHERITs here. Instead, use the delegation |
613 | mechanism provided by make-target-delegates. */ | |
7998dfc3 AC |
614 | for (t = target_stack; t; t = t->beneath) |
615 | { | |
616 | INHERIT (to_shortname, t); | |
617 | INHERIT (to_longname, t); | |
dc177b7a | 618 | INHERIT (to_attach_no_wait, t); |
74174d2e | 619 | INHERIT (to_have_steppable_watchpoint, t); |
7998dfc3 | 620 | INHERIT (to_have_continuable_watchpoint, t); |
7998dfc3 | 621 | INHERIT (to_has_thread_control, t); |
7998dfc3 AC |
622 | } |
623 | #undef INHERIT | |
624 | ||
7998dfc3 AC |
625 | /* Finally, position the target-stack beneath the squashed |
626 | "current_target". That way code looking for a non-inherited | |
627 | target method can quickly and simply find it. */ | |
628 | current_target.beneath = target_stack; | |
b4b61fdb DJ |
629 | |
630 | if (targetdebug) | |
631 | setup_target_debug (); | |
c906108c SS |
632 | } |
633 | ||
634 | /* Push a new target type into the stack of the existing target accessors, | |
635 | possibly superseding some of the existing accessors. | |
636 | ||
c906108c SS |
637 | Rather than allow an empty stack, we always have the dummy target at |
638 | the bottom stratum, so we can call the function vectors without | |
639 | checking them. */ | |
640 | ||
b26a4dcb | 641 | void |
fba45db2 | 642 | push_target (struct target_ops *t) |
c906108c | 643 | { |
258b763a | 644 | struct target_ops **cur; |
c906108c SS |
645 | |
646 | /* Check magic number. If wrong, it probably means someone changed | |
647 | the struct definition, but not all the places that initialize one. */ | |
648 | if (t->to_magic != OPS_MAGIC) | |
649 | { | |
c5aa993b JM |
650 | fprintf_unfiltered (gdb_stderr, |
651 | "Magic number of %s target struct wrong\n", | |
652 | t->to_shortname); | |
3e43a32a MS |
653 | internal_error (__FILE__, __LINE__, |
654 | _("failed internal consistency check")); | |
c906108c SS |
655 | } |
656 | ||
258b763a AC |
657 | /* Find the proper stratum to install this target in. */ |
658 | for (cur = &target_stack; (*cur) != NULL; cur = &(*cur)->beneath) | |
c906108c | 659 | { |
258b763a | 660 | if ((int) (t->to_stratum) >= (int) (*cur)->to_stratum) |
c906108c SS |
661 | break; |
662 | } | |
663 | ||
258b763a | 664 | /* If there's already targets at this stratum, remove them. */ |
88c231eb | 665 | /* FIXME: cagney/2003-10-15: I think this should be popping all |
258b763a AC |
666 | targets to CUR, and not just those at this stratum level. */ |
667 | while ((*cur) != NULL && t->to_stratum == (*cur)->to_stratum) | |
668 | { | |
669 | /* There's already something at this stratum level. Close it, | |
670 | and un-hook it from the stack. */ | |
671 | struct target_ops *tmp = (*cur); | |
5d502164 | 672 | |
258b763a AC |
673 | (*cur) = (*cur)->beneath; |
674 | tmp->beneath = NULL; | |
460014f5 | 675 | target_close (tmp); |
258b763a | 676 | } |
c906108c SS |
677 | |
678 | /* We have removed all targets in our stratum, now add the new one. */ | |
258b763a AC |
679 | t->beneath = (*cur); |
680 | (*cur) = t; | |
c906108c SS |
681 | |
682 | update_current_target (); | |
c906108c SS |
683 | } |
684 | ||
2bc416ba | 685 | /* Remove a target_ops vector from the stack, wherever it may be. |
c906108c SS |
686 | Return how many times it was removed (0 or 1). */ |
687 | ||
688 | int | |
fba45db2 | 689 | unpush_target (struct target_ops *t) |
c906108c | 690 | { |
258b763a AC |
691 | struct target_ops **cur; |
692 | struct target_ops *tmp; | |
c906108c | 693 | |
c8d104ad PA |
694 | if (t->to_stratum == dummy_stratum) |
695 | internal_error (__FILE__, __LINE__, | |
9b20d036 | 696 | _("Attempt to unpush the dummy target")); |
c8d104ad | 697 | |
c906108c | 698 | /* Look for the specified target. Note that we assume that a target |
c378eb4e | 699 | can only occur once in the target stack. */ |
c906108c | 700 | |
258b763a AC |
701 | for (cur = &target_stack; (*cur) != NULL; cur = &(*cur)->beneath) |
702 | { | |
703 | if ((*cur) == t) | |
704 | break; | |
705 | } | |
c906108c | 706 | |
305436e0 PA |
707 | /* If we don't find target_ops, quit. Only open targets should be |
708 | closed. */ | |
258b763a | 709 | if ((*cur) == NULL) |
305436e0 | 710 | return 0; |
5269965e | 711 | |
c378eb4e | 712 | /* Unchain the target. */ |
258b763a AC |
713 | tmp = (*cur); |
714 | (*cur) = (*cur)->beneath; | |
715 | tmp->beneath = NULL; | |
c906108c SS |
716 | |
717 | update_current_target (); | |
c906108c | 718 | |
305436e0 PA |
719 | /* Finally close the target. Note we do this after unchaining, so |
720 | any target method calls from within the target_close | |
721 | implementation don't end up in T anymore. */ | |
460014f5 | 722 | target_close (t); |
305436e0 | 723 | |
c906108c SS |
724 | return 1; |
725 | } | |
726 | ||
915ef8b1 PA |
727 | /* Unpush TARGET and assert that it worked. */ |
728 | ||
729 | static void | |
730 | unpush_target_and_assert (struct target_ops *target) | |
731 | { | |
732 | if (!unpush_target (target)) | |
733 | { | |
734 | fprintf_unfiltered (gdb_stderr, | |
735 | "pop_all_targets couldn't find target %s\n", | |
736 | target->to_shortname); | |
737 | internal_error (__FILE__, __LINE__, | |
738 | _("failed internal consistency check")); | |
739 | } | |
740 | } | |
741 | ||
aa76d38d | 742 | void |
460014f5 | 743 | pop_all_targets_above (enum strata above_stratum) |
aa76d38d | 744 | { |
87ab71f0 | 745 | while ((int) (current_target.to_stratum) > (int) above_stratum) |
915ef8b1 PA |
746 | unpush_target_and_assert (target_stack); |
747 | } | |
748 | ||
749 | /* See target.h. */ | |
750 | ||
751 | void | |
752 | pop_all_targets_at_and_above (enum strata stratum) | |
753 | { | |
754 | while ((int) (current_target.to_stratum) >= (int) stratum) | |
755 | unpush_target_and_assert (target_stack); | |
aa76d38d PA |
756 | } |
757 | ||
87ab71f0 | 758 | void |
460014f5 | 759 | pop_all_targets (void) |
87ab71f0 | 760 | { |
460014f5 | 761 | pop_all_targets_above (dummy_stratum); |
87ab71f0 PA |
762 | } |
763 | ||
c0edd9ed JK |
764 | /* Return 1 if T is now pushed in the target stack. Return 0 otherwise. */ |
765 | ||
766 | int | |
767 | target_is_pushed (struct target_ops *t) | |
768 | { | |
84202f9c | 769 | struct target_ops *cur; |
c0edd9ed JK |
770 | |
771 | /* Check magic number. If wrong, it probably means someone changed | |
772 | the struct definition, but not all the places that initialize one. */ | |
773 | if (t->to_magic != OPS_MAGIC) | |
774 | { | |
775 | fprintf_unfiltered (gdb_stderr, | |
776 | "Magic number of %s target struct wrong\n", | |
777 | t->to_shortname); | |
3e43a32a MS |
778 | internal_error (__FILE__, __LINE__, |
779 | _("failed internal consistency check")); | |
c0edd9ed JK |
780 | } |
781 | ||
84202f9c TT |
782 | for (cur = target_stack; cur != NULL; cur = cur->beneath) |
783 | if (cur == t) | |
c0edd9ed JK |
784 | return 1; |
785 | ||
786 | return 0; | |
787 | } | |
788 | ||
f0f9ff95 TT |
789 | /* Default implementation of to_get_thread_local_address. */ |
790 | ||
791 | static void | |
792 | generic_tls_error (void) | |
793 | { | |
794 | throw_error (TLS_GENERIC_ERROR, | |
795 | _("Cannot find thread-local variables on this target")); | |
796 | } | |
797 | ||
72f5cf0e | 798 | /* Using the objfile specified in OBJFILE, find the address for the |
9e35dae4 DJ |
799 | current thread's thread-local storage with offset OFFSET. */ |
800 | CORE_ADDR | |
801 | target_translate_tls_address (struct objfile *objfile, CORE_ADDR offset) | |
802 | { | |
803 | volatile CORE_ADDR addr = 0; | |
f0f9ff95 | 804 | struct target_ops *target = ¤t_target; |
9e35dae4 | 805 | |
f0f9ff95 | 806 | if (gdbarch_fetch_tls_load_module_address_p (target_gdbarch ())) |
9e35dae4 DJ |
807 | { |
808 | ptid_t ptid = inferior_ptid; | |
9e35dae4 | 809 | |
492d29ea | 810 | TRY |
9e35dae4 DJ |
811 | { |
812 | CORE_ADDR lm_addr; | |
813 | ||
814 | /* Fetch the load module address for this objfile. */ | |
f5656ead | 815 | lm_addr = gdbarch_fetch_tls_load_module_address (target_gdbarch (), |
9e35dae4 | 816 | objfile); |
9e35dae4 | 817 | |
3e43a32a MS |
818 | addr = target->to_get_thread_local_address (target, ptid, |
819 | lm_addr, offset); | |
9e35dae4 DJ |
820 | } |
821 | /* If an error occurred, print TLS related messages here. Otherwise, | |
822 | throw the error to some higher catcher. */ | |
492d29ea | 823 | CATCH (ex, RETURN_MASK_ALL) |
9e35dae4 DJ |
824 | { |
825 | int objfile_is_library = (objfile->flags & OBJF_SHARED); | |
826 | ||
827 | switch (ex.error) | |
828 | { | |
829 | case TLS_NO_LIBRARY_SUPPORT_ERROR: | |
3e43a32a MS |
830 | error (_("Cannot find thread-local variables " |
831 | "in this thread library.")); | |
9e35dae4 DJ |
832 | break; |
833 | case TLS_LOAD_MODULE_NOT_FOUND_ERROR: | |
834 | if (objfile_is_library) | |
835 | error (_("Cannot find shared library `%s' in dynamic" | |
4262abfb | 836 | " linker's load module list"), objfile_name (objfile)); |
9e35dae4 DJ |
837 | else |
838 | error (_("Cannot find executable file `%s' in dynamic" | |
4262abfb | 839 | " linker's load module list"), objfile_name (objfile)); |
9e35dae4 DJ |
840 | break; |
841 | case TLS_NOT_ALLOCATED_YET_ERROR: | |
842 | if (objfile_is_library) | |
843 | error (_("The inferior has not yet allocated storage for" | |
844 | " thread-local variables in\n" | |
845 | "the shared library `%s'\n" | |
846 | "for %s"), | |
4262abfb | 847 | objfile_name (objfile), target_pid_to_str (ptid)); |
9e35dae4 DJ |
848 | else |
849 | error (_("The inferior has not yet allocated storage for" | |
850 | " thread-local variables in\n" | |
851 | "the executable `%s'\n" | |
852 | "for %s"), | |
4262abfb | 853 | objfile_name (objfile), target_pid_to_str (ptid)); |
9e35dae4 DJ |
854 | break; |
855 | case TLS_GENERIC_ERROR: | |
856 | if (objfile_is_library) | |
857 | error (_("Cannot find thread-local storage for %s, " | |
858 | "shared library %s:\n%s"), | |
859 | target_pid_to_str (ptid), | |
4262abfb | 860 | objfile_name (objfile), ex.message); |
9e35dae4 DJ |
861 | else |
862 | error (_("Cannot find thread-local storage for %s, " | |
863 | "executable file %s:\n%s"), | |
864 | target_pid_to_str (ptid), | |
4262abfb | 865 | objfile_name (objfile), ex.message); |
9e35dae4 DJ |
866 | break; |
867 | default: | |
868 | throw_exception (ex); | |
869 | break; | |
870 | } | |
871 | } | |
492d29ea | 872 | END_CATCH |
9e35dae4 DJ |
873 | } |
874 | /* It wouldn't be wrong here to try a gdbarch method, too; finding | |
875 | TLS is an ABI-specific thing. But we don't do that yet. */ | |
876 | else | |
877 | error (_("Cannot find thread-local variables on this target")); | |
878 | ||
879 | return addr; | |
880 | } | |
881 | ||
6be7b56e | 882 | const char * |
01cb8804 | 883 | target_xfer_status_to_string (enum target_xfer_status status) |
6be7b56e PA |
884 | { |
885 | #define CASE(X) case X: return #X | |
01cb8804 | 886 | switch (status) |
6be7b56e PA |
887 | { |
888 | CASE(TARGET_XFER_E_IO); | |
bc113b4e | 889 | CASE(TARGET_XFER_UNAVAILABLE); |
6be7b56e PA |
890 | default: |
891 | return "<unknown>"; | |
892 | } | |
893 | #undef CASE | |
894 | }; | |
895 | ||
896 | ||
c906108c SS |
897 | #undef MIN |
898 | #define MIN(A, B) (((A) <= (B)) ? (A) : (B)) | |
899 | ||
900 | /* target_read_string -- read a null terminated string, up to LEN bytes, | |
901 | from MEMADDR in target. Set *ERRNOP to the errno code, or 0 if successful. | |
902 | Set *STRING to a pointer to malloc'd memory containing the data; the caller | |
903 | is responsible for freeing it. Return the number of bytes successfully | |
904 | read. */ | |
905 | ||
906 | int | |
fba45db2 | 907 | target_read_string (CORE_ADDR memaddr, char **string, int len, int *errnop) |
c906108c | 908 | { |
c2e8b827 | 909 | int tlen, offset, i; |
1b0ba102 | 910 | gdb_byte buf[4]; |
c906108c SS |
911 | int errcode = 0; |
912 | char *buffer; | |
913 | int buffer_allocated; | |
914 | char *bufptr; | |
915 | unsigned int nbytes_read = 0; | |
916 | ||
6217bf3e MS |
917 | gdb_assert (string); |
918 | ||
c906108c SS |
919 | /* Small for testing. */ |
920 | buffer_allocated = 4; | |
224c3ddb | 921 | buffer = (char *) xmalloc (buffer_allocated); |
c906108c SS |
922 | bufptr = buffer; |
923 | ||
c906108c SS |
924 | while (len > 0) |
925 | { | |
926 | tlen = MIN (len, 4 - (memaddr & 3)); | |
927 | offset = memaddr & 3; | |
928 | ||
1b0ba102 | 929 | errcode = target_read_memory (memaddr & ~3, buf, sizeof buf); |
c906108c SS |
930 | if (errcode != 0) |
931 | { | |
932 | /* The transfer request might have crossed the boundary to an | |
c378eb4e | 933 | unallocated region of memory. Retry the transfer, requesting |
c906108c SS |
934 | a single byte. */ |
935 | tlen = 1; | |
936 | offset = 0; | |
b8eb5af0 | 937 | errcode = target_read_memory (memaddr, buf, 1); |
c906108c SS |
938 | if (errcode != 0) |
939 | goto done; | |
940 | } | |
941 | ||
942 | if (bufptr - buffer + tlen > buffer_allocated) | |
943 | { | |
944 | unsigned int bytes; | |
5d502164 | 945 | |
c906108c SS |
946 | bytes = bufptr - buffer; |
947 | buffer_allocated *= 2; | |
224c3ddb | 948 | buffer = (char *) xrealloc (buffer, buffer_allocated); |
c906108c SS |
949 | bufptr = buffer + bytes; |
950 | } | |
951 | ||
952 | for (i = 0; i < tlen; i++) | |
953 | { | |
954 | *bufptr++ = buf[i + offset]; | |
955 | if (buf[i + offset] == '\000') | |
956 | { | |
957 | nbytes_read += i + 1; | |
958 | goto done; | |
959 | } | |
960 | } | |
961 | ||
962 | memaddr += tlen; | |
963 | len -= tlen; | |
964 | nbytes_read += tlen; | |
965 | } | |
c5aa993b | 966 | done: |
6217bf3e | 967 | *string = buffer; |
c906108c SS |
968 | if (errnop != NULL) |
969 | *errnop = errcode; | |
c906108c SS |
970 | return nbytes_read; |
971 | } | |
972 | ||
07b82ea5 PA |
973 | struct target_section_table * |
974 | target_get_section_table (struct target_ops *target) | |
975 | { | |
7e35c012 | 976 | return (*target->to_get_section_table) (target); |
07b82ea5 PA |
977 | } |
978 | ||
8db32d44 | 979 | /* Find a section containing ADDR. */ |
07b82ea5 | 980 | |
0542c86d | 981 | struct target_section * |
8db32d44 AC |
982 | target_section_by_addr (struct target_ops *target, CORE_ADDR addr) |
983 | { | |
07b82ea5 | 984 | struct target_section_table *table = target_get_section_table (target); |
0542c86d | 985 | struct target_section *secp; |
07b82ea5 PA |
986 | |
987 | if (table == NULL) | |
988 | return NULL; | |
989 | ||
990 | for (secp = table->sections; secp < table->sections_end; secp++) | |
8db32d44 AC |
991 | { |
992 | if (addr >= secp->addr && addr < secp->endaddr) | |
993 | return secp; | |
994 | } | |
995 | return NULL; | |
996 | } | |
997 | ||
0fec99e8 PA |
998 | |
999 | /* Helper for the memory xfer routines. Checks the attributes of the | |
1000 | memory region of MEMADDR against the read or write being attempted. | |
1001 | If the access is permitted returns true, otherwise returns false. | |
1002 | REGION_P is an optional output parameter. If not-NULL, it is | |
1003 | filled with a pointer to the memory region of MEMADDR. REG_LEN | |
1004 | returns LEN trimmed to the end of the region. This is how much the | |
1005 | caller can continue requesting, if the access is permitted. A | |
1006 | single xfer request must not straddle memory region boundaries. */ | |
1007 | ||
1008 | static int | |
1009 | memory_xfer_check_region (gdb_byte *readbuf, const gdb_byte *writebuf, | |
1010 | ULONGEST memaddr, ULONGEST len, ULONGEST *reg_len, | |
1011 | struct mem_region **region_p) | |
1012 | { | |
1013 | struct mem_region *region; | |
1014 | ||
1015 | region = lookup_mem_region (memaddr); | |
1016 | ||
1017 | if (region_p != NULL) | |
1018 | *region_p = region; | |
1019 | ||
1020 | switch (region->attrib.mode) | |
1021 | { | |
1022 | case MEM_RO: | |
1023 | if (writebuf != NULL) | |
1024 | return 0; | |
1025 | break; | |
1026 | ||
1027 | case MEM_WO: | |
1028 | if (readbuf != NULL) | |
1029 | return 0; | |
1030 | break; | |
1031 | ||
1032 | case MEM_FLASH: | |
1033 | /* We only support writing to flash during "load" for now. */ | |
1034 | if (writebuf != NULL) | |
1035 | error (_("Writing to flash memory forbidden in this context")); | |
1036 | break; | |
1037 | ||
1038 | case MEM_NONE: | |
1039 | return 0; | |
1040 | } | |
1041 | ||
1042 | /* region->hi == 0 means there's no upper bound. */ | |
1043 | if (memaddr + len < region->hi || region->hi == 0) | |
1044 | *reg_len = len; | |
1045 | else | |
1046 | *reg_len = region->hi - memaddr; | |
1047 | ||
1048 | return 1; | |
1049 | } | |
1050 | ||
9f713294 YQ |
1051 | /* Read memory from more than one valid target. A core file, for |
1052 | instance, could have some of memory but delegate other bits to | |
1053 | the target below it. So, we must manually try all targets. */ | |
1054 | ||
cc9f16aa | 1055 | enum target_xfer_status |
17fde6d0 | 1056 | raw_memory_xfer_partial (struct target_ops *ops, gdb_byte *readbuf, |
9b409511 YQ |
1057 | const gdb_byte *writebuf, ULONGEST memaddr, LONGEST len, |
1058 | ULONGEST *xfered_len) | |
9f713294 | 1059 | { |
9b409511 | 1060 | enum target_xfer_status res; |
9f713294 YQ |
1061 | |
1062 | do | |
1063 | { | |
1064 | res = ops->to_xfer_partial (ops, TARGET_OBJECT_MEMORY, NULL, | |
9b409511 YQ |
1065 | readbuf, writebuf, memaddr, len, |
1066 | xfered_len); | |
1067 | if (res == TARGET_XFER_OK) | |
9f713294 YQ |
1068 | break; |
1069 | ||
633785ff | 1070 | /* Stop if the target reports that the memory is not available. */ |
bc113b4e | 1071 | if (res == TARGET_XFER_UNAVAILABLE) |
633785ff MM |
1072 | break; |
1073 | ||
9f713294 YQ |
1074 | /* We want to continue past core files to executables, but not |
1075 | past a running target's memory. */ | |
1076 | if (ops->to_has_all_memory (ops)) | |
1077 | break; | |
1078 | ||
1079 | ops = ops->beneath; | |
1080 | } | |
1081 | while (ops != NULL); | |
1082 | ||
0f26cec1 PA |
1083 | /* The cache works at the raw memory level. Make sure the cache |
1084 | gets updated with raw contents no matter what kind of memory | |
1085 | object was originally being written. Note we do write-through | |
1086 | first, so that if it fails, we don't write to the cache contents | |
1087 | that never made it to the target. */ | |
1088 | if (writebuf != NULL | |
1089 | && !ptid_equal (inferior_ptid, null_ptid) | |
1090 | && target_dcache_init_p () | |
1091 | && (stack_cache_enabled_p () || code_cache_enabled_p ())) | |
1092 | { | |
1093 | DCACHE *dcache = target_dcache_get (); | |
1094 | ||
1095 | /* Note that writing to an area of memory which wasn't present | |
1096 | in the cache doesn't cause it to be loaded in. */ | |
1097 | dcache_update (dcache, res, memaddr, writebuf, *xfered_len); | |
1098 | } | |
1099 | ||
9f713294 YQ |
1100 | return res; |
1101 | } | |
1102 | ||
7f79c47e DE |
1103 | /* Perform a partial memory transfer. |
1104 | For docs see target.h, to_xfer_partial. */ | |
cf7a04e8 | 1105 | |
9b409511 | 1106 | static enum target_xfer_status |
f0ba3972 | 1107 | memory_xfer_partial_1 (struct target_ops *ops, enum target_object object, |
17fde6d0 | 1108 | gdb_byte *readbuf, const gdb_byte *writebuf, ULONGEST memaddr, |
9b409511 | 1109 | ULONGEST len, ULONGEST *xfered_len) |
0779438d | 1110 | { |
9b409511 | 1111 | enum target_xfer_status res; |
0fec99e8 | 1112 | ULONGEST reg_len; |
cf7a04e8 | 1113 | struct mem_region *region; |
4e5d721f | 1114 | struct inferior *inf; |
cf7a04e8 | 1115 | |
07b82ea5 PA |
1116 | /* For accesses to unmapped overlay sections, read directly from |
1117 | files. Must do this first, as MEMADDR may need adjustment. */ | |
1118 | if (readbuf != NULL && overlay_debugging) | |
1119 | { | |
1120 | struct obj_section *section = find_pc_overlay (memaddr); | |
5d502164 | 1121 | |
07b82ea5 PA |
1122 | if (pc_in_unmapped_range (memaddr, section)) |
1123 | { | |
1124 | struct target_section_table *table | |
1125 | = target_get_section_table (ops); | |
1126 | const char *section_name = section->the_bfd_section->name; | |
5d502164 | 1127 | |
07b82ea5 PA |
1128 | memaddr = overlay_mapped_address (memaddr, section); |
1129 | return section_table_xfer_memory_partial (readbuf, writebuf, | |
9b409511 | 1130 | memaddr, len, xfered_len, |
07b82ea5 PA |
1131 | table->sections, |
1132 | table->sections_end, | |
1133 | section_name); | |
1134 | } | |
1135 | } | |
1136 | ||
1137 | /* Try the executable files, if "trust-readonly-sections" is set. */ | |
cf7a04e8 DJ |
1138 | if (readbuf != NULL && trust_readonly) |
1139 | { | |
0542c86d | 1140 | struct target_section *secp; |
07b82ea5 | 1141 | struct target_section_table *table; |
cf7a04e8 DJ |
1142 | |
1143 | secp = target_section_by_addr (ops, memaddr); | |
1144 | if (secp != NULL | |
2b2848e2 DE |
1145 | && (bfd_get_section_flags (secp->the_bfd_section->owner, |
1146 | secp->the_bfd_section) | |
cf7a04e8 | 1147 | & SEC_READONLY)) |
07b82ea5 PA |
1148 | { |
1149 | table = target_get_section_table (ops); | |
1150 | return section_table_xfer_memory_partial (readbuf, writebuf, | |
9b409511 | 1151 | memaddr, len, xfered_len, |
07b82ea5 PA |
1152 | table->sections, |
1153 | table->sections_end, | |
1154 | NULL); | |
1155 | } | |
98646950 UW |
1156 | } |
1157 | ||
cf7a04e8 | 1158 | /* Try GDB's internal data cache. */ |
cf7a04e8 | 1159 | |
0fec99e8 PA |
1160 | if (!memory_xfer_check_region (readbuf, writebuf, memaddr, len, ®_len, |
1161 | ®ion)) | |
1162 | return TARGET_XFER_E_IO; | |
cf7a04e8 | 1163 | |
6c95b8df | 1164 | if (!ptid_equal (inferior_ptid, null_ptid)) |
c9657e70 | 1165 | inf = find_inferior_ptid (inferior_ptid); |
6c95b8df PA |
1166 | else |
1167 | inf = NULL; | |
4e5d721f DE |
1168 | |
1169 | if (inf != NULL | |
0f26cec1 | 1170 | && readbuf != NULL |
2f4d8875 PA |
1171 | /* The dcache reads whole cache lines; that doesn't play well |
1172 | with reading from a trace buffer, because reading outside of | |
1173 | the collected memory range fails. */ | |
1174 | && get_traceframe_number () == -1 | |
4e5d721f | 1175 | && (region->attrib.cache |
29453a14 YQ |
1176 | || (stack_cache_enabled_p () && object == TARGET_OBJECT_STACK_MEMORY) |
1177 | || (code_cache_enabled_p () && object == TARGET_OBJECT_CODE_MEMORY))) | |
cf7a04e8 | 1178 | { |
2a2f9fe4 YQ |
1179 | DCACHE *dcache = target_dcache_get_or_init (); |
1180 | ||
0f26cec1 PA |
1181 | return dcache_read_memory_partial (ops, dcache, memaddr, readbuf, |
1182 | reg_len, xfered_len); | |
cf7a04e8 DJ |
1183 | } |
1184 | ||
1185 | /* If none of those methods found the memory we wanted, fall back | |
1186 | to a target partial transfer. Normally a single call to | |
1187 | to_xfer_partial is enough; if it doesn't recognize an object | |
1188 | it will call the to_xfer_partial of the next target down. | |
1189 | But for memory this won't do. Memory is the only target | |
9b409511 YQ |
1190 | object which can be read from more than one valid target. |
1191 | A core file, for instance, could have some of memory but | |
1192 | delegate other bits to the target below it. So, we must | |
1193 | manually try all targets. */ | |
1194 | ||
1195 | res = raw_memory_xfer_partial (ops, readbuf, writebuf, memaddr, reg_len, | |
1196 | xfered_len); | |
cf7a04e8 DJ |
1197 | |
1198 | /* If we still haven't got anything, return the last error. We | |
1199 | give up. */ | |
1200 | return res; | |
0779438d AC |
1201 | } |
1202 | ||
f0ba3972 PA |
1203 | /* Perform a partial memory transfer. For docs see target.h, |
1204 | to_xfer_partial. */ | |
1205 | ||
9b409511 | 1206 | static enum target_xfer_status |
f0ba3972 | 1207 | memory_xfer_partial (struct target_ops *ops, enum target_object object, |
9b409511 YQ |
1208 | gdb_byte *readbuf, const gdb_byte *writebuf, |
1209 | ULONGEST memaddr, ULONGEST len, ULONGEST *xfered_len) | |
f0ba3972 | 1210 | { |
9b409511 | 1211 | enum target_xfer_status res; |
f0ba3972 PA |
1212 | |
1213 | /* Zero length requests are ok and require no work. */ | |
1214 | if (len == 0) | |
9b409511 | 1215 | return TARGET_XFER_EOF; |
f0ba3972 | 1216 | |
a738ea1d YQ |
1217 | memaddr = address_significant (target_gdbarch (), memaddr); |
1218 | ||
f0ba3972 PA |
1219 | /* Fill in READBUF with breakpoint shadows, or WRITEBUF with |
1220 | breakpoint insns, thus hiding out from higher layers whether | |
1221 | there are software breakpoints inserted in the code stream. */ | |
1222 | if (readbuf != NULL) | |
1223 | { | |
9b409511 YQ |
1224 | res = memory_xfer_partial_1 (ops, object, readbuf, NULL, memaddr, len, |
1225 | xfered_len); | |
f0ba3972 | 1226 | |
9b409511 | 1227 | if (res == TARGET_XFER_OK && !show_memory_breakpoints) |
c63528fc | 1228 | breakpoint_xfer_memory (readbuf, NULL, NULL, memaddr, *xfered_len); |
f0ba3972 PA |
1229 | } |
1230 | else | |
1231 | { | |
67c059c2 AB |
1232 | /* A large write request is likely to be partially satisfied |
1233 | by memory_xfer_partial_1. We will continually malloc | |
1234 | and free a copy of the entire write request for breakpoint | |
1235 | shadow handling even though we only end up writing a small | |
09c98b44 DB |
1236 | subset of it. Cap writes to a limit specified by the target |
1237 | to mitigate this. */ | |
325fac50 | 1238 | len = std::min (ops->to_get_memory_xfer_limit (ops), len); |
67c059c2 | 1239 | |
26fcd5d7 TT |
1240 | gdb::byte_vector buf (writebuf, writebuf + len); |
1241 | breakpoint_xfer_memory (NULL, buf.data (), writebuf, memaddr, len); | |
1242 | res = memory_xfer_partial_1 (ops, object, NULL, buf.data (), memaddr, len, | |
9b409511 | 1243 | xfered_len); |
f0ba3972 PA |
1244 | } |
1245 | ||
1246 | return res; | |
1247 | } | |
1248 | ||
cb85b21b TT |
1249 | scoped_restore_tmpl<int> |
1250 | make_scoped_restore_show_memory_breakpoints (int show) | |
8defab1a | 1251 | { |
cb85b21b | 1252 | return make_scoped_restore (&show_memory_breakpoints, show); |
8defab1a DJ |
1253 | } |
1254 | ||
7f79c47e DE |
1255 | /* For docs see target.h, to_xfer_partial. */ |
1256 | ||
9b409511 | 1257 | enum target_xfer_status |
27394598 AC |
1258 | target_xfer_partial (struct target_ops *ops, |
1259 | enum target_object object, const char *annex, | |
4ac248ca | 1260 | gdb_byte *readbuf, const gdb_byte *writebuf, |
9b409511 YQ |
1261 | ULONGEST offset, ULONGEST len, |
1262 | ULONGEST *xfered_len) | |
27394598 | 1263 | { |
9b409511 | 1264 | enum target_xfer_status retval; |
27394598 AC |
1265 | |
1266 | gdb_assert (ops->to_xfer_partial != NULL); | |
cf7a04e8 | 1267 | |
ce6d0892 YQ |
1268 | /* Transfer is done when LEN is zero. */ |
1269 | if (len == 0) | |
9b409511 | 1270 | return TARGET_XFER_EOF; |
ce6d0892 | 1271 | |
d914c394 SS |
1272 | if (writebuf && !may_write_memory) |
1273 | error (_("Writing to memory is not allowed (addr %s, len %s)"), | |
1274 | core_addr_to_string_nz (offset), plongest (len)); | |
1275 | ||
9b409511 YQ |
1276 | *xfered_len = 0; |
1277 | ||
cf7a04e8 DJ |
1278 | /* If this is a memory transfer, let the memory-specific code |
1279 | have a look at it instead. Memory transfers are more | |
1280 | complicated. */ | |
29453a14 YQ |
1281 | if (object == TARGET_OBJECT_MEMORY || object == TARGET_OBJECT_STACK_MEMORY |
1282 | || object == TARGET_OBJECT_CODE_MEMORY) | |
4e5d721f | 1283 | retval = memory_xfer_partial (ops, object, readbuf, |
9b409511 | 1284 | writebuf, offset, len, xfered_len); |
9f713294 | 1285 | else if (object == TARGET_OBJECT_RAW_MEMORY) |
cf7a04e8 | 1286 | { |
0fec99e8 PA |
1287 | /* Skip/avoid accessing the target if the memory region |
1288 | attributes block the access. Check this here instead of in | |
1289 | raw_memory_xfer_partial as otherwise we'd end up checking | |
1290 | this twice in the case of the memory_xfer_partial path is | |
1291 | taken; once before checking the dcache, and another in the | |
1292 | tail call to raw_memory_xfer_partial. */ | |
1293 | if (!memory_xfer_check_region (readbuf, writebuf, offset, len, &len, | |
1294 | NULL)) | |
1295 | return TARGET_XFER_E_IO; | |
1296 | ||
9f713294 | 1297 | /* Request the normal memory object from other layers. */ |
9b409511 YQ |
1298 | retval = raw_memory_xfer_partial (ops, readbuf, writebuf, offset, len, |
1299 | xfered_len); | |
cf7a04e8 | 1300 | } |
9f713294 YQ |
1301 | else |
1302 | retval = ops->to_xfer_partial (ops, object, annex, readbuf, | |
9b409511 | 1303 | writebuf, offset, len, xfered_len); |
cf7a04e8 | 1304 | |
27394598 AC |
1305 | if (targetdebug) |
1306 | { | |
1307 | const unsigned char *myaddr = NULL; | |
1308 | ||
1309 | fprintf_unfiltered (gdb_stdlog, | |
3e43a32a | 1310 | "%s:target_xfer_partial " |
9b409511 | 1311 | "(%d, %s, %s, %s, %s, %s) = %d, %s", |
27394598 AC |
1312 | ops->to_shortname, |
1313 | (int) object, | |
1314 | (annex ? annex : "(null)"), | |
53b71562 JB |
1315 | host_address_to_string (readbuf), |
1316 | host_address_to_string (writebuf), | |
0b1553bc | 1317 | core_addr_to_string_nz (offset), |
9b409511 YQ |
1318 | pulongest (len), retval, |
1319 | pulongest (*xfered_len)); | |
27394598 AC |
1320 | |
1321 | if (readbuf) | |
1322 | myaddr = readbuf; | |
1323 | if (writebuf) | |
1324 | myaddr = writebuf; | |
9b409511 | 1325 | if (retval == TARGET_XFER_OK && myaddr != NULL) |
27394598 AC |
1326 | { |
1327 | int i; | |
2bc416ba | 1328 | |
27394598 | 1329 | fputs_unfiltered (", bytes =", gdb_stdlog); |
9b409511 | 1330 | for (i = 0; i < *xfered_len; i++) |
27394598 | 1331 | { |
53b71562 | 1332 | if ((((intptr_t) &(myaddr[i])) & 0xf) == 0) |
27394598 AC |
1333 | { |
1334 | if (targetdebug < 2 && i > 0) | |
1335 | { | |
1336 | fprintf_unfiltered (gdb_stdlog, " ..."); | |
1337 | break; | |
1338 | } | |
1339 | fprintf_unfiltered (gdb_stdlog, "\n"); | |
1340 | } | |
2bc416ba | 1341 | |
27394598 AC |
1342 | fprintf_unfiltered (gdb_stdlog, " %02x", myaddr[i] & 0xff); |
1343 | } | |
1344 | } | |
2bc416ba | 1345 | |
27394598 AC |
1346 | fputc_unfiltered ('\n', gdb_stdlog); |
1347 | } | |
9b409511 YQ |
1348 | |
1349 | /* Check implementations of to_xfer_partial update *XFERED_LEN | |
1350 | properly. Do assertion after printing debug messages, so that we | |
1351 | can find more clues on assertion failure from debugging messages. */ | |
bc113b4e | 1352 | if (retval == TARGET_XFER_OK || retval == TARGET_XFER_UNAVAILABLE) |
9b409511 YQ |
1353 | gdb_assert (*xfered_len > 0); |
1354 | ||
27394598 AC |
1355 | return retval; |
1356 | } | |
1357 | ||
578d3588 PA |
1358 | /* Read LEN bytes of target memory at address MEMADDR, placing the |
1359 | results in GDB's memory at MYADDR. Returns either 0 for success or | |
d09f2c3f | 1360 | -1 if any error occurs. |
c906108c SS |
1361 | |
1362 | If an error occurs, no guarantee is made about the contents of the data at | |
1363 | MYADDR. In particular, the caller should not depend upon partial reads | |
1364 | filling the buffer with good data. There is no way for the caller to know | |
1365 | how much good data might have been transfered anyway. Callers that can | |
cf7a04e8 | 1366 | deal with partial reads should call target_read (which will retry until |
c378eb4e | 1367 | it makes no progress, and then return how much was transferred). */ |
c906108c SS |
1368 | |
1369 | int | |
1b162304 | 1370 | target_read_memory (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len) |
c906108c | 1371 | { |
c35b1492 PA |
1372 | /* Dispatch to the topmost target, not the flattened current_target. |
1373 | Memory accesses check target->to_has_(all_)memory, and the | |
1374 | flattened target doesn't inherit those. */ | |
1375 | if (target_read (current_target.beneath, TARGET_OBJECT_MEMORY, NULL, | |
cf7a04e8 DJ |
1376 | myaddr, memaddr, len) == len) |
1377 | return 0; | |
0779438d | 1378 | else |
d09f2c3f | 1379 | return -1; |
c906108c SS |
1380 | } |
1381 | ||
721ec300 GB |
1382 | /* See target/target.h. */ |
1383 | ||
1384 | int | |
1385 | target_read_uint32 (CORE_ADDR memaddr, uint32_t *result) | |
1386 | { | |
1387 | gdb_byte buf[4]; | |
1388 | int r; | |
1389 | ||
1390 | r = target_read_memory (memaddr, buf, sizeof buf); | |
1391 | if (r != 0) | |
1392 | return r; | |
1393 | *result = extract_unsigned_integer (buf, sizeof buf, | |
1394 | gdbarch_byte_order (target_gdbarch ())); | |
1395 | return 0; | |
1396 | } | |
1397 | ||
aee4bf85 PA |
1398 | /* Like target_read_memory, but specify explicitly that this is a read |
1399 | from the target's raw memory. That is, this read bypasses the | |
1400 | dcache, breakpoint shadowing, etc. */ | |
1401 | ||
1402 | int | |
1403 | target_read_raw_memory (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len) | |
1404 | { | |
1405 | /* See comment in target_read_memory about why the request starts at | |
1406 | current_target.beneath. */ | |
1407 | if (target_read (current_target.beneath, TARGET_OBJECT_RAW_MEMORY, NULL, | |
1408 | myaddr, memaddr, len) == len) | |
1409 | return 0; | |
1410 | else | |
d09f2c3f | 1411 | return -1; |
aee4bf85 PA |
1412 | } |
1413 | ||
4e5d721f DE |
1414 | /* Like target_read_memory, but specify explicitly that this is a read from |
1415 | the target's stack. This may trigger different cache behavior. */ | |
1416 | ||
1417 | int | |
45aa4659 | 1418 | target_read_stack (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len) |
4e5d721f | 1419 | { |
aee4bf85 PA |
1420 | /* See comment in target_read_memory about why the request starts at |
1421 | current_target.beneath. */ | |
4e5d721f DE |
1422 | if (target_read (current_target.beneath, TARGET_OBJECT_STACK_MEMORY, NULL, |
1423 | myaddr, memaddr, len) == len) | |
1424 | return 0; | |
1425 | else | |
d09f2c3f | 1426 | return -1; |
4e5d721f DE |
1427 | } |
1428 | ||
29453a14 YQ |
1429 | /* Like target_read_memory, but specify explicitly that this is a read from |
1430 | the target's code. This may trigger different cache behavior. */ | |
1431 | ||
1432 | int | |
1433 | target_read_code (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len) | |
1434 | { | |
aee4bf85 PA |
1435 | /* See comment in target_read_memory about why the request starts at |
1436 | current_target.beneath. */ | |
29453a14 YQ |
1437 | if (target_read (current_target.beneath, TARGET_OBJECT_CODE_MEMORY, NULL, |
1438 | myaddr, memaddr, len) == len) | |
1439 | return 0; | |
1440 | else | |
d09f2c3f | 1441 | return -1; |
29453a14 YQ |
1442 | } |
1443 | ||
7f79c47e | 1444 | /* Write LEN bytes from MYADDR to target memory at address MEMADDR. |
d09f2c3f PA |
1445 | Returns either 0 for success or -1 if any error occurs. If an |
1446 | error occurs, no guarantee is made about how much data got written. | |
1447 | Callers that can deal with partial writes should call | |
1448 | target_write. */ | |
7f79c47e | 1449 | |
c906108c | 1450 | int |
45aa4659 | 1451 | target_write_memory (CORE_ADDR memaddr, const gdb_byte *myaddr, ssize_t len) |
c906108c | 1452 | { |
aee4bf85 PA |
1453 | /* See comment in target_read_memory about why the request starts at |
1454 | current_target.beneath. */ | |
c35b1492 | 1455 | if (target_write (current_target.beneath, TARGET_OBJECT_MEMORY, NULL, |
cf7a04e8 DJ |
1456 | myaddr, memaddr, len) == len) |
1457 | return 0; | |
0779438d | 1458 | else |
d09f2c3f | 1459 | return -1; |
c906108c | 1460 | } |
c5aa993b | 1461 | |
f0ba3972 | 1462 | /* Write LEN bytes from MYADDR to target raw memory at address |
d09f2c3f PA |
1463 | MEMADDR. Returns either 0 for success or -1 if any error occurs. |
1464 | If an error occurs, no guarantee is made about how much data got | |
1465 | written. Callers that can deal with partial writes should call | |
1466 | target_write. */ | |
f0ba3972 PA |
1467 | |
1468 | int | |
45aa4659 | 1469 | target_write_raw_memory (CORE_ADDR memaddr, const gdb_byte *myaddr, ssize_t len) |
f0ba3972 | 1470 | { |
aee4bf85 PA |
1471 | /* See comment in target_read_memory about why the request starts at |
1472 | current_target.beneath. */ | |
f0ba3972 PA |
1473 | if (target_write (current_target.beneath, TARGET_OBJECT_RAW_MEMORY, NULL, |
1474 | myaddr, memaddr, len) == len) | |
1475 | return 0; | |
1476 | else | |
d09f2c3f | 1477 | return -1; |
f0ba3972 PA |
1478 | } |
1479 | ||
fd79ecee DJ |
1480 | /* Fetch the target's memory map. */ |
1481 | ||
a664f67e | 1482 | std::vector<mem_region> |
fd79ecee DJ |
1483 | target_memory_map (void) |
1484 | { | |
a664f67e SM |
1485 | std::vector<mem_region> result |
1486 | = current_target.to_memory_map (¤t_target); | |
1487 | if (result.empty ()) | |
1488 | return result; | |
fd79ecee | 1489 | |
a664f67e | 1490 | std::sort (result.begin (), result.end ()); |
fd79ecee DJ |
1491 | |
1492 | /* Check that regions do not overlap. Simultaneously assign | |
1493 | a numbering for the "mem" commands to use to refer to | |
1494 | each region. */ | |
a664f67e SM |
1495 | mem_region *last_one = NULL; |
1496 | for (size_t ix = 0; ix < result.size (); ix++) | |
fd79ecee | 1497 | { |
a664f67e | 1498 | mem_region *this_one = &result[ix]; |
fd79ecee DJ |
1499 | this_one->number = ix; |
1500 | ||
a664f67e | 1501 | if (last_one != NULL && last_one->hi > this_one->lo) |
fd79ecee DJ |
1502 | { |
1503 | warning (_("Overlapping regions in memory map: ignoring")); | |
a664f67e | 1504 | return std::vector<mem_region> (); |
fd79ecee | 1505 | } |
a664f67e | 1506 | |
fd79ecee DJ |
1507 | last_one = this_one; |
1508 | } | |
1509 | ||
1510 | return result; | |
1511 | } | |
1512 | ||
a76d924d DJ |
1513 | void |
1514 | target_flash_erase (ULONGEST address, LONGEST length) | |
1515 | { | |
e8a6c6ac | 1516 | current_target.to_flash_erase (¤t_target, address, length); |
a76d924d DJ |
1517 | } |
1518 | ||
1519 | void | |
1520 | target_flash_done (void) | |
1521 | { | |
f6fb2925 | 1522 | current_target.to_flash_done (¤t_target); |
a76d924d DJ |
1523 | } |
1524 | ||
920d2a44 AC |
1525 | static void |
1526 | show_trust_readonly (struct ui_file *file, int from_tty, | |
1527 | struct cmd_list_element *c, const char *value) | |
1528 | { | |
3e43a32a MS |
1529 | fprintf_filtered (file, |
1530 | _("Mode for reading from readonly sections is %s.\n"), | |
920d2a44 AC |
1531 | value); |
1532 | } | |
3a11626d | 1533 | |
7f79c47e | 1534 | /* Target vector read/write partial wrapper functions. */ |
0088c768 | 1535 | |
9b409511 | 1536 | static enum target_xfer_status |
1e3ff5ad AC |
1537 | target_read_partial (struct target_ops *ops, |
1538 | enum target_object object, | |
1b0ba102 | 1539 | const char *annex, gdb_byte *buf, |
9b409511 YQ |
1540 | ULONGEST offset, ULONGEST len, |
1541 | ULONGEST *xfered_len) | |
1e3ff5ad | 1542 | { |
9b409511 YQ |
1543 | return target_xfer_partial (ops, object, annex, buf, NULL, offset, len, |
1544 | xfered_len); | |
1e3ff5ad AC |
1545 | } |
1546 | ||
8a55ffb0 | 1547 | static enum target_xfer_status |
1e3ff5ad AC |
1548 | target_write_partial (struct target_ops *ops, |
1549 | enum target_object object, | |
1b0ba102 | 1550 | const char *annex, const gdb_byte *buf, |
9b409511 | 1551 | ULONGEST offset, LONGEST len, ULONGEST *xfered_len) |
1e3ff5ad | 1552 | { |
9b409511 YQ |
1553 | return target_xfer_partial (ops, object, annex, NULL, buf, offset, len, |
1554 | xfered_len); | |
1e3ff5ad AC |
1555 | } |
1556 | ||
1557 | /* Wrappers to perform the full transfer. */ | |
7f79c47e DE |
1558 | |
1559 | /* For docs on target_read see target.h. */ | |
1560 | ||
1e3ff5ad AC |
1561 | LONGEST |
1562 | target_read (struct target_ops *ops, | |
1563 | enum target_object object, | |
1b0ba102 | 1564 | const char *annex, gdb_byte *buf, |
1e3ff5ad AC |
1565 | ULONGEST offset, LONGEST len) |
1566 | { | |
279a6fed | 1567 | LONGEST xfered_total = 0; |
d309493c SM |
1568 | int unit_size = 1; |
1569 | ||
1570 | /* If we are reading from a memory object, find the length of an addressable | |
1571 | unit for that architecture. */ | |
1572 | if (object == TARGET_OBJECT_MEMORY | |
1573 | || object == TARGET_OBJECT_STACK_MEMORY | |
1574 | || object == TARGET_OBJECT_CODE_MEMORY | |
1575 | || object == TARGET_OBJECT_RAW_MEMORY) | |
1576 | unit_size = gdbarch_addressable_memory_unit_size (target_gdbarch ()); | |
5d502164 | 1577 | |
279a6fed | 1578 | while (xfered_total < len) |
1e3ff5ad | 1579 | { |
279a6fed | 1580 | ULONGEST xfered_partial; |
9b409511 YQ |
1581 | enum target_xfer_status status; |
1582 | ||
1583 | status = target_read_partial (ops, object, annex, | |
d309493c | 1584 | buf + xfered_total * unit_size, |
279a6fed SM |
1585 | offset + xfered_total, len - xfered_total, |
1586 | &xfered_partial); | |
5d502164 | 1587 | |
1e3ff5ad | 1588 | /* Call an observer, notifying them of the xfer progress? */ |
9b409511 | 1589 | if (status == TARGET_XFER_EOF) |
279a6fed | 1590 | return xfered_total; |
9b409511 YQ |
1591 | else if (status == TARGET_XFER_OK) |
1592 | { | |
279a6fed | 1593 | xfered_total += xfered_partial; |
9b409511 YQ |
1594 | QUIT; |
1595 | } | |
1596 | else | |
279a6fed | 1597 | return TARGET_XFER_E_IO; |
9b409511 | 1598 | |
1e3ff5ad AC |
1599 | } |
1600 | return len; | |
1601 | } | |
1602 | ||
f1a507a1 JB |
1603 | /* Assuming that the entire [begin, end) range of memory cannot be |
1604 | read, try to read whatever subrange is possible to read. | |
1605 | ||
1606 | The function returns, in RESULT, either zero or one memory block. | |
1607 | If there's a readable subrange at the beginning, it is completely | |
1608 | read and returned. Any further readable subrange will not be read. | |
1609 | Otherwise, if there's a readable subrange at the end, it will be | |
1610 | completely read and returned. Any readable subranges before it | |
1611 | (obviously, not starting at the beginning), will be ignored. In | |
1612 | other cases -- either no readable subrange, or readable subrange(s) | |
1613 | that is neither at the beginning, or end, nothing is returned. | |
1614 | ||
1615 | The purpose of this function is to handle a read across a boundary | |
1616 | of accessible memory in a case when memory map is not available. | |
1617 | The above restrictions are fine for this case, but will give | |
1618 | incorrect results if the memory is 'patchy'. However, supporting | |
1619 | 'patchy' memory would require trying to read every single byte, | |
1620 | and it seems unacceptable solution. Explicit memory map is | |
1621 | recommended for this case -- and target_read_memory_robust will | |
1622 | take care of reading multiple ranges then. */ | |
8dedea02 VP |
1623 | |
1624 | static void | |
3e43a32a | 1625 | read_whatever_is_readable (struct target_ops *ops, |
279a6fed | 1626 | const ULONGEST begin, const ULONGEST end, |
d309493c | 1627 | int unit_size, |
386c8614 | 1628 | std::vector<memory_read_result> *result) |
d5086790 | 1629 | { |
8dedea02 VP |
1630 | ULONGEST current_begin = begin; |
1631 | ULONGEST current_end = end; | |
1632 | int forward; | |
9b409511 | 1633 | ULONGEST xfered_len; |
8dedea02 VP |
1634 | |
1635 | /* If we previously failed to read 1 byte, nothing can be done here. */ | |
1636 | if (end - begin <= 1) | |
386c8614 TT |
1637 | return; |
1638 | ||
1639 | gdb::unique_xmalloc_ptr<gdb_byte> buf ((gdb_byte *) xmalloc (end - begin)); | |
8dedea02 VP |
1640 | |
1641 | /* Check that either first or the last byte is readable, and give up | |
c378eb4e | 1642 | if not. This heuristic is meant to permit reading accessible memory |
8dedea02 VP |
1643 | at the boundary of accessible region. */ |
1644 | if (target_read_partial (ops, TARGET_OBJECT_MEMORY, NULL, | |
386c8614 | 1645 | buf.get (), begin, 1, &xfered_len) == TARGET_XFER_OK) |
8dedea02 VP |
1646 | { |
1647 | forward = 1; | |
1648 | ++current_begin; | |
1649 | } | |
1650 | else if (target_read_partial (ops, TARGET_OBJECT_MEMORY, NULL, | |
386c8614 | 1651 | buf.get () + (end - begin) - 1, end - 1, 1, |
9b409511 | 1652 | &xfered_len) == TARGET_XFER_OK) |
8dedea02 VP |
1653 | { |
1654 | forward = 0; | |
1655 | --current_end; | |
1656 | } | |
1657 | else | |
386c8614 | 1658 | return; |
8dedea02 VP |
1659 | |
1660 | /* Loop invariant is that the [current_begin, current_end) was previously | |
1661 | found to be not readable as a whole. | |
1662 | ||
1663 | Note loop condition -- if the range has 1 byte, we can't divide the range | |
1664 | so there's no point trying further. */ | |
1665 | while (current_end - current_begin > 1) | |
1666 | { | |
1667 | ULONGEST first_half_begin, first_half_end; | |
1668 | ULONGEST second_half_begin, second_half_end; | |
1669 | LONGEST xfer; | |
279a6fed | 1670 | ULONGEST middle = current_begin + (current_end - current_begin) / 2; |
f1a507a1 | 1671 | |
8dedea02 VP |
1672 | if (forward) |
1673 | { | |
1674 | first_half_begin = current_begin; | |
1675 | first_half_end = middle; | |
1676 | second_half_begin = middle; | |
1677 | second_half_end = current_end; | |
1678 | } | |
1679 | else | |
1680 | { | |
1681 | first_half_begin = middle; | |
1682 | first_half_end = current_end; | |
1683 | second_half_begin = current_begin; | |
1684 | second_half_end = middle; | |
1685 | } | |
1686 | ||
1687 | xfer = target_read (ops, TARGET_OBJECT_MEMORY, NULL, | |
386c8614 | 1688 | buf.get () + (first_half_begin - begin) * unit_size, |
8dedea02 VP |
1689 | first_half_begin, |
1690 | first_half_end - first_half_begin); | |
1691 | ||
1692 | if (xfer == first_half_end - first_half_begin) | |
1693 | { | |
c378eb4e | 1694 | /* This half reads up fine. So, the error must be in the |
3e43a32a | 1695 | other half. */ |
8dedea02 VP |
1696 | current_begin = second_half_begin; |
1697 | current_end = second_half_end; | |
1698 | } | |
1699 | else | |
1700 | { | |
c378eb4e | 1701 | /* This half is not readable. Because we've tried one byte, we |
279a6fed | 1702 | know some part of this half if actually readable. Go to the next |
8dedea02 VP |
1703 | iteration to divide again and try to read. |
1704 | ||
1705 | We don't handle the other half, because this function only tries | |
1706 | to read a single readable subrange. */ | |
1707 | current_begin = first_half_begin; | |
1708 | current_end = first_half_end; | |
1709 | } | |
1710 | } | |
1711 | ||
1712 | if (forward) | |
1713 | { | |
1714 | /* The [begin, current_begin) range has been read. */ | |
386c8614 | 1715 | result->emplace_back (begin, current_end, std::move (buf)); |
8dedea02 VP |
1716 | } |
1717 | else | |
1718 | { | |
1719 | /* The [current_end, end) range has been read. */ | |
279a6fed | 1720 | LONGEST region_len = end - current_end; |
f1a507a1 | 1721 | |
386c8614 TT |
1722 | gdb::unique_xmalloc_ptr<gdb_byte> data |
1723 | ((gdb_byte *) xmalloc (region_len * unit_size)); | |
1724 | memcpy (data.get (), buf.get () + (current_end - begin) * unit_size, | |
d309493c | 1725 | region_len * unit_size); |
386c8614 | 1726 | result->emplace_back (current_end, end, std::move (data)); |
8dedea02 | 1727 | } |
8dedea02 VP |
1728 | } |
1729 | ||
386c8614 | 1730 | std::vector<memory_read_result> |
279a6fed SM |
1731 | read_memory_robust (struct target_ops *ops, |
1732 | const ULONGEST offset, const LONGEST len) | |
8dedea02 | 1733 | { |
386c8614 | 1734 | std::vector<memory_read_result> result; |
d309493c | 1735 | int unit_size = gdbarch_addressable_memory_unit_size (target_gdbarch ()); |
8dedea02 | 1736 | |
279a6fed SM |
1737 | LONGEST xfered_total = 0; |
1738 | while (xfered_total < len) | |
d5086790 | 1739 | { |
279a6fed SM |
1740 | struct mem_region *region = lookup_mem_region (offset + xfered_total); |
1741 | LONGEST region_len; | |
5d502164 | 1742 | |
8dedea02 VP |
1743 | /* If there is no explicit region, a fake one should be created. */ |
1744 | gdb_assert (region); | |
1745 | ||
1746 | if (region->hi == 0) | |
279a6fed | 1747 | region_len = len - xfered_total; |
8dedea02 | 1748 | else |
279a6fed | 1749 | region_len = region->hi - offset; |
8dedea02 VP |
1750 | |
1751 | if (region->attrib.mode == MEM_NONE || region->attrib.mode == MEM_WO) | |
d5086790 | 1752 | { |
c378eb4e | 1753 | /* Cannot read this region. Note that we can end up here only |
8dedea02 VP |
1754 | if the region is explicitly marked inaccessible, or |
1755 | 'inaccessible-by-default' is in effect. */ | |
279a6fed | 1756 | xfered_total += region_len; |
8dedea02 VP |
1757 | } |
1758 | else | |
1759 | { | |
325fac50 | 1760 | LONGEST to_read = std::min (len - xfered_total, region_len); |
386c8614 TT |
1761 | gdb::unique_xmalloc_ptr<gdb_byte> buffer |
1762 | ((gdb_byte *) xmalloc (to_read * unit_size)); | |
8dedea02 | 1763 | |
279a6fed | 1764 | LONGEST xfered_partial = |
386c8614 | 1765 | target_read (ops, TARGET_OBJECT_MEMORY, NULL, buffer.get (), |
279a6fed | 1766 | offset + xfered_total, to_read); |
8dedea02 | 1767 | /* Call an observer, notifying them of the xfer progress? */ |
279a6fed | 1768 | if (xfered_partial <= 0) |
d5086790 | 1769 | { |
c378eb4e | 1770 | /* Got an error reading full chunk. See if maybe we can read |
8dedea02 | 1771 | some subrange. */ |
e084c964 DB |
1772 | read_whatever_is_readable (ops, offset + xfered_total, |
1773 | offset + xfered_total + to_read, | |
1774 | unit_size, &result); | |
279a6fed | 1775 | xfered_total += to_read; |
d5086790 | 1776 | } |
8dedea02 VP |
1777 | else |
1778 | { | |
386c8614 TT |
1779 | result.emplace_back (offset + xfered_total, |
1780 | offset + xfered_total + xfered_partial, | |
1781 | std::move (buffer)); | |
279a6fed | 1782 | xfered_total += xfered_partial; |
8dedea02 VP |
1783 | } |
1784 | QUIT; | |
d5086790 | 1785 | } |
d5086790 | 1786 | } |
9d78f827 | 1787 | |
8dedea02 | 1788 | return result; |
d5086790 VP |
1789 | } |
1790 | ||
8dedea02 | 1791 | |
cf7a04e8 DJ |
1792 | /* An alternative to target_write with progress callbacks. */ |
1793 | ||
1e3ff5ad | 1794 | LONGEST |
cf7a04e8 DJ |
1795 | target_write_with_progress (struct target_ops *ops, |
1796 | enum target_object object, | |
1797 | const char *annex, const gdb_byte *buf, | |
1798 | ULONGEST offset, LONGEST len, | |
1799 | void (*progress) (ULONGEST, void *), void *baton) | |
1e3ff5ad | 1800 | { |
279a6fed | 1801 | LONGEST xfered_total = 0; |
d309493c SM |
1802 | int unit_size = 1; |
1803 | ||
1804 | /* If we are writing to a memory object, find the length of an addressable | |
1805 | unit for that architecture. */ | |
1806 | if (object == TARGET_OBJECT_MEMORY | |
1807 | || object == TARGET_OBJECT_STACK_MEMORY | |
1808 | || object == TARGET_OBJECT_CODE_MEMORY | |
1809 | || object == TARGET_OBJECT_RAW_MEMORY) | |
1810 | unit_size = gdbarch_addressable_memory_unit_size (target_gdbarch ()); | |
a76d924d DJ |
1811 | |
1812 | /* Give the progress callback a chance to set up. */ | |
1813 | if (progress) | |
1814 | (*progress) (0, baton); | |
1815 | ||
279a6fed | 1816 | while (xfered_total < len) |
1e3ff5ad | 1817 | { |
279a6fed | 1818 | ULONGEST xfered_partial; |
9b409511 YQ |
1819 | enum target_xfer_status status; |
1820 | ||
1821 | status = target_write_partial (ops, object, annex, | |
d309493c | 1822 | buf + xfered_total * unit_size, |
279a6fed SM |
1823 | offset + xfered_total, len - xfered_total, |
1824 | &xfered_partial); | |
cf7a04e8 | 1825 | |
5c328c05 | 1826 | if (status != TARGET_XFER_OK) |
279a6fed | 1827 | return status == TARGET_XFER_EOF ? xfered_total : TARGET_XFER_E_IO; |
cf7a04e8 DJ |
1828 | |
1829 | if (progress) | |
279a6fed | 1830 | (*progress) (xfered_partial, baton); |
cf7a04e8 | 1831 | |
279a6fed | 1832 | xfered_total += xfered_partial; |
1e3ff5ad AC |
1833 | QUIT; |
1834 | } | |
1835 | return len; | |
1836 | } | |
1837 | ||
7f79c47e DE |
1838 | /* For docs on target_write see target.h. */ |
1839 | ||
cf7a04e8 DJ |
1840 | LONGEST |
1841 | target_write (struct target_ops *ops, | |
1842 | enum target_object object, | |
1843 | const char *annex, const gdb_byte *buf, | |
1844 | ULONGEST offset, LONGEST len) | |
1845 | { | |
1846 | return target_write_with_progress (ops, object, annex, buf, offset, len, | |
1847 | NULL, NULL); | |
1848 | } | |
1849 | ||
159f81f3 DJ |
1850 | /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return |
1851 | the size of the transferred data. PADDING additional bytes are | |
1852 | available in *BUF_P. This is a helper function for | |
1853 | target_read_alloc; see the declaration of that function for more | |
1854 | information. */ | |
13547ab6 | 1855 | |
159f81f3 DJ |
1856 | static LONGEST |
1857 | target_read_alloc_1 (struct target_ops *ops, enum target_object object, | |
1858 | const char *annex, gdb_byte **buf_p, int padding) | |
13547ab6 DJ |
1859 | { |
1860 | size_t buf_alloc, buf_pos; | |
1861 | gdb_byte *buf; | |
13547ab6 DJ |
1862 | |
1863 | /* This function does not have a length parameter; it reads the | |
1864 | entire OBJECT). Also, it doesn't support objects fetched partly | |
1865 | from one target and partly from another (in a different stratum, | |
1866 | e.g. a core file and an executable). Both reasons make it | |
1867 | unsuitable for reading memory. */ | |
1868 | gdb_assert (object != TARGET_OBJECT_MEMORY); | |
1869 | ||
1870 | /* Start by reading up to 4K at a time. The target will throttle | |
1871 | this number down if necessary. */ | |
1872 | buf_alloc = 4096; | |
224c3ddb | 1873 | buf = (gdb_byte *) xmalloc (buf_alloc); |
13547ab6 DJ |
1874 | buf_pos = 0; |
1875 | while (1) | |
1876 | { | |
9b409511 YQ |
1877 | ULONGEST xfered_len; |
1878 | enum target_xfer_status status; | |
1879 | ||
1880 | status = target_read_partial (ops, object, annex, &buf[buf_pos], | |
1881 | buf_pos, buf_alloc - buf_pos - padding, | |
1882 | &xfered_len); | |
1883 | ||
1884 | if (status == TARGET_XFER_EOF) | |
13547ab6 DJ |
1885 | { |
1886 | /* Read all there was. */ | |
1887 | if (buf_pos == 0) | |
1888 | xfree (buf); | |
1889 | else | |
1890 | *buf_p = buf; | |
1891 | return buf_pos; | |
1892 | } | |
9b409511 YQ |
1893 | else if (status != TARGET_XFER_OK) |
1894 | { | |
1895 | /* An error occurred. */ | |
1896 | xfree (buf); | |
1897 | return TARGET_XFER_E_IO; | |
1898 | } | |
13547ab6 | 1899 | |
9b409511 | 1900 | buf_pos += xfered_len; |
13547ab6 DJ |
1901 | |
1902 | /* If the buffer is filling up, expand it. */ | |
1903 | if (buf_alloc < buf_pos * 2) | |
1904 | { | |
1905 | buf_alloc *= 2; | |
224c3ddb | 1906 | buf = (gdb_byte *) xrealloc (buf, buf_alloc); |
13547ab6 DJ |
1907 | } |
1908 | ||
1909 | QUIT; | |
1910 | } | |
1911 | } | |
1912 | ||
159f81f3 DJ |
1913 | /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return |
1914 | the size of the transferred data. See the declaration in "target.h" | |
1915 | function for more information about the return value. */ | |
1916 | ||
1917 | LONGEST | |
1918 | target_read_alloc (struct target_ops *ops, enum target_object object, | |
1919 | const char *annex, gdb_byte **buf_p) | |
1920 | { | |
1921 | return target_read_alloc_1 (ops, object, annex, buf_p, 0); | |
1922 | } | |
1923 | ||
b7b030ad | 1924 | /* See target.h. */ |
159f81f3 | 1925 | |
b7b030ad | 1926 | gdb::unique_xmalloc_ptr<char> |
159f81f3 DJ |
1927 | target_read_stralloc (struct target_ops *ops, enum target_object object, |
1928 | const char *annex) | |
1929 | { | |
39086a0e PA |
1930 | gdb_byte *buffer; |
1931 | char *bufstr; | |
7313baad | 1932 | LONGEST i, transferred; |
159f81f3 | 1933 | |
39086a0e PA |
1934 | transferred = target_read_alloc_1 (ops, object, annex, &buffer, 1); |
1935 | bufstr = (char *) buffer; | |
159f81f3 DJ |
1936 | |
1937 | if (transferred < 0) | |
1938 | return NULL; | |
1939 | ||
1940 | if (transferred == 0) | |
b7b030ad | 1941 | return gdb::unique_xmalloc_ptr<char> (xstrdup ("")); |
159f81f3 | 1942 | |
39086a0e | 1943 | bufstr[transferred] = 0; |
7313baad UW |
1944 | |
1945 | /* Check for embedded NUL bytes; but allow trailing NULs. */ | |
39086a0e PA |
1946 | for (i = strlen (bufstr); i < transferred; i++) |
1947 | if (bufstr[i] != 0) | |
7313baad UW |
1948 | { |
1949 | warning (_("target object %d, annex %s, " | |
1950 | "contained unexpected null characters"), | |
1951 | (int) object, annex ? annex : "(none)"); | |
1952 | break; | |
1953 | } | |
159f81f3 | 1954 | |
b7b030ad | 1955 | return gdb::unique_xmalloc_ptr<char> (bufstr); |
159f81f3 DJ |
1956 | } |
1957 | ||
b6591e8b AC |
1958 | /* Memory transfer methods. */ |
1959 | ||
1960 | void | |
1b0ba102 | 1961 | get_target_memory (struct target_ops *ops, CORE_ADDR addr, gdb_byte *buf, |
b6591e8b AC |
1962 | LONGEST len) |
1963 | { | |
07b82ea5 PA |
1964 | /* This method is used to read from an alternate, non-current |
1965 | target. This read must bypass the overlay support (as symbols | |
1966 | don't match this target), and GDB's internal cache (wrong cache | |
1967 | for this target). */ | |
1968 | if (target_read (ops, TARGET_OBJECT_RAW_MEMORY, NULL, buf, addr, len) | |
b6591e8b | 1969 | != len) |
578d3588 | 1970 | memory_error (TARGET_XFER_E_IO, addr); |
b6591e8b AC |
1971 | } |
1972 | ||
1973 | ULONGEST | |
5d502164 MS |
1974 | get_target_memory_unsigned (struct target_ops *ops, CORE_ADDR addr, |
1975 | int len, enum bfd_endian byte_order) | |
b6591e8b | 1976 | { |
f6519ebc | 1977 | gdb_byte buf[sizeof (ULONGEST)]; |
b6591e8b AC |
1978 | |
1979 | gdb_assert (len <= sizeof (buf)); | |
1980 | get_target_memory (ops, addr, buf, len); | |
e17a4113 | 1981 | return extract_unsigned_integer (buf, len, byte_order); |
b6591e8b AC |
1982 | } |
1983 | ||
3db08215 MM |
1984 | /* See target.h. */ |
1985 | ||
d914c394 SS |
1986 | int |
1987 | target_insert_breakpoint (struct gdbarch *gdbarch, | |
1988 | struct bp_target_info *bp_tgt) | |
1989 | { | |
1990 | if (!may_insert_breakpoints) | |
1991 | { | |
1992 | warning (_("May not insert breakpoints")); | |
1993 | return 1; | |
1994 | } | |
1995 | ||
6b84065d TT |
1996 | return current_target.to_insert_breakpoint (¤t_target, |
1997 | gdbarch, bp_tgt); | |
d914c394 SS |
1998 | } |
1999 | ||
3db08215 MM |
2000 | /* See target.h. */ |
2001 | ||
d914c394 | 2002 | int |
6b84065d | 2003 | target_remove_breakpoint (struct gdbarch *gdbarch, |
73971819 PA |
2004 | struct bp_target_info *bp_tgt, |
2005 | enum remove_bp_reason reason) | |
d914c394 SS |
2006 | { |
2007 | /* This is kind of a weird case to handle, but the permission might | |
2008 | have been changed after breakpoints were inserted - in which case | |
2009 | we should just take the user literally and assume that any | |
2010 | breakpoints should be left in place. */ | |
2011 | if (!may_insert_breakpoints) | |
2012 | { | |
2013 | warning (_("May not remove breakpoints")); | |
2014 | return 1; | |
2015 | } | |
2016 | ||
6b84065d | 2017 | return current_target.to_remove_breakpoint (¤t_target, |
73971819 | 2018 | gdbarch, bp_tgt, reason); |
d914c394 SS |
2019 | } |
2020 | ||
c906108c | 2021 | static void |
1d12d88f | 2022 | info_target_command (const char *args, int from_tty) |
c906108c SS |
2023 | { |
2024 | struct target_ops *t; | |
c906108c | 2025 | int has_all_mem = 0; |
c5aa993b | 2026 | |
c906108c | 2027 | if (symfile_objfile != NULL) |
4262abfb JK |
2028 | printf_unfiltered (_("Symbols from \"%s\".\n"), |
2029 | objfile_name (symfile_objfile)); | |
c906108c | 2030 | |
258b763a | 2031 | for (t = target_stack; t != NULL; t = t->beneath) |
c906108c | 2032 | { |
c35b1492 | 2033 | if (!(*t->to_has_memory) (t)) |
c906108c SS |
2034 | continue; |
2035 | ||
c5aa993b | 2036 | if ((int) (t->to_stratum) <= (int) dummy_stratum) |
c906108c SS |
2037 | continue; |
2038 | if (has_all_mem) | |
3e43a32a MS |
2039 | printf_unfiltered (_("\tWhile running this, " |
2040 | "GDB does not access memory from...\n")); | |
c5aa993b JM |
2041 | printf_unfiltered ("%s:\n", t->to_longname); |
2042 | (t->to_files_info) (t); | |
c35b1492 | 2043 | has_all_mem = (*t->to_has_all_memory) (t); |
c906108c SS |
2044 | } |
2045 | } | |
2046 | ||
fd79ecee DJ |
2047 | /* This function is called before any new inferior is created, e.g. |
2048 | by running a program, attaching, or connecting to a target. | |
2049 | It cleans up any state from previous invocations which might | |
2050 | change between runs. This is a subset of what target_preopen | |
2051 | resets (things which might change between targets). */ | |
2052 | ||
2053 | void | |
2054 | target_pre_inferior (int from_tty) | |
2055 | { | |
c378eb4e | 2056 | /* Clear out solib state. Otherwise the solib state of the previous |
b9db4ced | 2057 | inferior might have survived and is entirely wrong for the new |
c378eb4e | 2058 | target. This has been observed on GNU/Linux using glibc 2.3. How |
b9db4ced UW |
2059 | to reproduce: |
2060 | ||
2061 | bash$ ./foo& | |
2062 | [1] 4711 | |
2063 | bash$ ./foo& | |
2064 | [1] 4712 | |
2065 | bash$ gdb ./foo | |
2066 | [...] | |
2067 | (gdb) attach 4711 | |
2068 | (gdb) detach | |
2069 | (gdb) attach 4712 | |
2070 | Cannot access memory at address 0xdeadbeef | |
2071 | */ | |
b9db4ced | 2072 | |
50c71eaf PA |
2073 | /* In some OSs, the shared library list is the same/global/shared |
2074 | across inferiors. If code is shared between processes, so are | |
2075 | memory regions and features. */ | |
f5656ead | 2076 | if (!gdbarch_has_global_solist (target_gdbarch ())) |
50c71eaf PA |
2077 | { |
2078 | no_shared_libraries (NULL, from_tty); | |
2079 | ||
2080 | invalidate_target_mem_regions (); | |
424163ea | 2081 | |
50c71eaf PA |
2082 | target_clear_description (); |
2083 | } | |
8ffcbaaf | 2084 | |
e9756d52 PP |
2085 | /* attach_flag may be set if the previous process associated with |
2086 | the inferior was attached to. */ | |
2087 | current_inferior ()->attach_flag = 0; | |
2088 | ||
5d5658a1 PA |
2089 | current_inferior ()->highest_thread_num = 0; |
2090 | ||
8ffcbaaf | 2091 | agent_capability_invalidate (); |
fd79ecee DJ |
2092 | } |
2093 | ||
b8fa0bfa PA |
2094 | /* Callback for iterate_over_inferiors. Gets rid of the given |
2095 | inferior. */ | |
2096 | ||
2097 | static int | |
2098 | dispose_inferior (struct inferior *inf, void *args) | |
2099 | { | |
2100 | struct thread_info *thread; | |
2101 | ||
2102 | thread = any_thread_of_process (inf->pid); | |
2103 | if (thread) | |
2104 | { | |
2105 | switch_to_thread (thread->ptid); | |
2106 | ||
2107 | /* Core inferiors actually should be detached, not killed. */ | |
2108 | if (target_has_execution) | |
2109 | target_kill (); | |
2110 | else | |
6e1e1966 | 2111 | target_detach (inf, 0); |
b8fa0bfa PA |
2112 | } |
2113 | ||
2114 | return 0; | |
2115 | } | |
2116 | ||
c906108c SS |
2117 | /* This is to be called by the open routine before it does |
2118 | anything. */ | |
2119 | ||
2120 | void | |
fba45db2 | 2121 | target_preopen (int from_tty) |
c906108c | 2122 | { |
c5aa993b | 2123 | dont_repeat (); |
c906108c | 2124 | |
b8fa0bfa | 2125 | if (have_inferiors ()) |
c5aa993b | 2126 | { |
adf40b2e | 2127 | if (!from_tty |
b8fa0bfa PA |
2128 | || !have_live_inferiors () |
2129 | || query (_("A program is being debugged already. Kill it? "))) | |
2130 | iterate_over_inferiors (dispose_inferior, NULL); | |
c906108c | 2131 | else |
8a3fe4f8 | 2132 | error (_("Program not killed.")); |
c906108c SS |
2133 | } |
2134 | ||
2135 | /* Calling target_kill may remove the target from the stack. But if | |
2136 | it doesn't (which seems like a win for UDI), remove it now. */ | |
87ab71f0 PA |
2137 | /* Leave the exec target, though. The user may be switching from a |
2138 | live process to a core of the same program. */ | |
460014f5 | 2139 | pop_all_targets_above (file_stratum); |
fd79ecee DJ |
2140 | |
2141 | target_pre_inferior (from_tty); | |
c906108c SS |
2142 | } |
2143 | ||
6bd6f3b6 | 2144 | /* See target.h. */ |
c906108c SS |
2145 | |
2146 | void | |
6e1e1966 | 2147 | target_detach (inferior *inf, int from_tty) |
c906108c | 2148 | { |
6e1e1966 SM |
2149 | /* As long as some to_detach implementations rely on the current_inferior |
2150 | (either directly, or indirectly, like through target_gdbarch or by | |
2151 | reading memory), INF needs to be the current inferior. When that | |
2152 | requirement will become no longer true, then we can remove this | |
2153 | assertion. */ | |
2154 | gdb_assert (inf == current_inferior ()); | |
2155 | ||
f5656ead | 2156 | if (gdbarch_has_global_breakpoints (target_gdbarch ())) |
50c71eaf PA |
2157 | /* Don't remove global breakpoints here. They're removed on |
2158 | disconnection from the target. */ | |
2159 | ; | |
2160 | else | |
2161 | /* If we're in breakpoints-always-inserted mode, have to remove | |
2162 | them before detaching. */ | |
dfd4cc63 | 2163 | remove_breakpoints_pid (ptid_get_pid (inferior_ptid)); |
74960c60 | 2164 | |
24291992 PA |
2165 | prepare_for_detach (); |
2166 | ||
6e1e1966 | 2167 | current_target.to_detach (¤t_target, inf, from_tty); |
c906108c SS |
2168 | } |
2169 | ||
6ad8ae5c | 2170 | void |
fee354ee | 2171 | target_disconnect (const char *args, int from_tty) |
6ad8ae5c | 2172 | { |
50c71eaf PA |
2173 | /* If we're in breakpoints-always-inserted mode or if breakpoints |
2174 | are global across processes, we have to remove them before | |
2175 | disconnecting. */ | |
74960c60 VP |
2176 | remove_breakpoints (); |
2177 | ||
86a0854a | 2178 | current_target.to_disconnect (¤t_target, args, from_tty); |
6ad8ae5c DJ |
2179 | } |
2180 | ||
f2b9e3df SDJ |
2181 | /* See target/target.h. */ |
2182 | ||
117de6a9 | 2183 | ptid_t |
47608cb1 | 2184 | target_wait (ptid_t ptid, struct target_waitstatus *status, int options) |
117de6a9 | 2185 | { |
a7068b60 | 2186 | return (current_target.to_wait) (¤t_target, ptid, status, options); |
117de6a9 PA |
2187 | } |
2188 | ||
0b333c5e PA |
2189 | /* See target.h. */ |
2190 | ||
2191 | ptid_t | |
2192 | default_target_wait (struct target_ops *ops, | |
2193 | ptid_t ptid, struct target_waitstatus *status, | |
2194 | int options) | |
2195 | { | |
2196 | status->kind = TARGET_WAITKIND_IGNORE; | |
2197 | return minus_one_ptid; | |
2198 | } | |
2199 | ||
7a114964 | 2200 | const char * |
117de6a9 PA |
2201 | target_pid_to_str (ptid_t ptid) |
2202 | { | |
770234d3 | 2203 | return (*current_target.to_pid_to_str) (¤t_target, ptid); |
117de6a9 PA |
2204 | } |
2205 | ||
73ede765 | 2206 | const char * |
4694da01 TT |
2207 | target_thread_name (struct thread_info *info) |
2208 | { | |
825828fc | 2209 | return current_target.to_thread_name (¤t_target, info); |
4694da01 TT |
2210 | } |
2211 | ||
e04ee09e KB |
2212 | struct thread_info * |
2213 | target_thread_handle_to_thread_info (const gdb_byte *thread_handle, | |
2214 | int handle_len, | |
2215 | struct inferior *inf) | |
2216 | { | |
2217 | return current_target.to_thread_handle_to_thread_info | |
2218 | (¤t_target, thread_handle, handle_len, inf); | |
2219 | } | |
2220 | ||
e1ac3328 | 2221 | void |
2ea28649 | 2222 | target_resume (ptid_t ptid, int step, enum gdb_signal signal) |
e1ac3328 | 2223 | { |
4e5d721f | 2224 | target_dcache_invalidate (); |
28439f5e | 2225 | |
6b84065d | 2226 | current_target.to_resume (¤t_target, ptid, step, signal); |
28439f5e | 2227 | |
6b84065d | 2228 | registers_changed_ptid (ptid); |
251bde03 PA |
2229 | /* We only set the internal executing state here. The user/frontend |
2230 | running state is set at a higher level. */ | |
6b84065d | 2231 | set_executing (ptid, 1); |
6b84065d | 2232 | clear_inline_frame_state (ptid); |
e1ac3328 | 2233 | } |
2455069d | 2234 | |
85ad3aaf PA |
2235 | /* If true, target_commit_resume is a nop. */ |
2236 | static int defer_target_commit_resume; | |
2237 | ||
2238 | /* See target.h. */ | |
2239 | ||
2240 | void | |
2241 | target_commit_resume (void) | |
2242 | { | |
85ad3aaf PA |
2243 | if (defer_target_commit_resume) |
2244 | return; | |
2245 | ||
2246 | current_target.to_commit_resume (¤t_target); | |
2247 | } | |
2248 | ||
2249 | /* See target.h. */ | |
2250 | ||
a9bc57b9 TT |
2251 | scoped_restore_tmpl<int> |
2252 | make_scoped_defer_target_commit_resume () | |
85ad3aaf | 2253 | { |
a9bc57b9 | 2254 | return make_scoped_restore (&defer_target_commit_resume, 1); |
85ad3aaf PA |
2255 | } |
2256 | ||
2455069d UW |
2257 | void |
2258 | target_pass_signals (int numsigs, unsigned char *pass_signals) | |
2259 | { | |
035cad7f | 2260 | (*current_target.to_pass_signals) (¤t_target, numsigs, pass_signals); |
2455069d UW |
2261 | } |
2262 | ||
9b224c5e PA |
2263 | void |
2264 | target_program_signals (int numsigs, unsigned char *program_signals) | |
2265 | { | |
7d4f8efa TT |
2266 | (*current_target.to_program_signals) (¤t_target, |
2267 | numsigs, program_signals); | |
9b224c5e PA |
2268 | } |
2269 | ||
098dba18 TT |
2270 | static int |
2271 | default_follow_fork (struct target_ops *self, int follow_child, | |
2272 | int detach_fork) | |
2273 | { | |
2274 | /* Some target returned a fork event, but did not know how to follow it. */ | |
2275 | internal_error (__FILE__, __LINE__, | |
2276 | _("could not find a target to follow fork")); | |
2277 | } | |
2278 | ||
ee057212 DJ |
2279 | /* Look through the list of possible targets for a target that can |
2280 | follow forks. */ | |
2281 | ||
2282 | int | |
07107ca6 | 2283 | target_follow_fork (int follow_child, int detach_fork) |
ee057212 | 2284 | { |
a7068b60 TT |
2285 | return current_target.to_follow_fork (¤t_target, |
2286 | follow_child, detach_fork); | |
ee057212 DJ |
2287 | } |
2288 | ||
94585166 DB |
2289 | /* Target wrapper for follow exec hook. */ |
2290 | ||
2291 | void | |
2292 | target_follow_exec (struct inferior *inf, char *execd_pathname) | |
2293 | { | |
2294 | current_target.to_follow_exec (¤t_target, inf, execd_pathname); | |
2295 | } | |
2296 | ||
8d657035 TT |
2297 | static void |
2298 | default_mourn_inferior (struct target_ops *self) | |
2299 | { | |
2300 | internal_error (__FILE__, __LINE__, | |
2301 | _("could not find a target to follow mourn inferior")); | |
2302 | } | |
2303 | ||
136d6dae | 2304 | void |
bc1e6c81 | 2305 | target_mourn_inferior (ptid_t ptid) |
136d6dae | 2306 | { |
bc1e6c81 | 2307 | gdb_assert (ptid_equal (ptid, inferior_ptid)); |
8d657035 | 2308 | current_target.to_mourn_inferior (¤t_target); |
136d6dae | 2309 | |
8d657035 TT |
2310 | /* We no longer need to keep handles on any of the object files. |
2311 | Make sure to release them to avoid unnecessarily locking any | |
2312 | of them while we're not actually debugging. */ | |
2313 | bfd_cache_close_all (); | |
136d6dae VP |
2314 | } |
2315 | ||
424163ea DJ |
2316 | /* Look for a target which can describe architectural features, starting |
2317 | from TARGET. If we find one, return its description. */ | |
2318 | ||
2319 | const struct target_desc * | |
2320 | target_read_description (struct target_ops *target) | |
2321 | { | |
2117c711 | 2322 | return target->to_read_description (target); |
424163ea DJ |
2323 | } |
2324 | ||
58a5184e | 2325 | /* This implements a basic search of memory, reading target memory and |
08388c79 DE |
2326 | performing the search here (as opposed to performing the search in on the |
2327 | target side with, for example, gdbserver). */ | |
2328 | ||
2329 | int | |
2330 | simple_search_memory (struct target_ops *ops, | |
2331 | CORE_ADDR start_addr, ULONGEST search_space_len, | |
2332 | const gdb_byte *pattern, ULONGEST pattern_len, | |
2333 | CORE_ADDR *found_addrp) | |
2334 | { | |
2335 | /* NOTE: also defined in find.c testcase. */ | |
2336 | #define SEARCH_CHUNK_SIZE 16000 | |
2337 | const unsigned chunk_size = SEARCH_CHUNK_SIZE; | |
2338 | /* Buffer to hold memory contents for searching. */ | |
08388c79 | 2339 | unsigned search_buf_size; |
08388c79 DE |
2340 | |
2341 | search_buf_size = chunk_size + pattern_len - 1; | |
2342 | ||
2343 | /* No point in trying to allocate a buffer larger than the search space. */ | |
2344 | if (search_space_len < search_buf_size) | |
2345 | search_buf_size = search_space_len; | |
2346 | ||
26fcd5d7 | 2347 | gdb::byte_vector search_buf (search_buf_size); |
08388c79 DE |
2348 | |
2349 | /* Prime the search buffer. */ | |
2350 | ||
2351 | if (target_read (ops, TARGET_OBJECT_MEMORY, NULL, | |
26fcd5d7 TT |
2352 | search_buf.data (), start_addr, search_buf_size) |
2353 | != search_buf_size) | |
08388c79 | 2354 | { |
b3dc46ff AB |
2355 | warning (_("Unable to access %s bytes of target " |
2356 | "memory at %s, halting search."), | |
2357 | pulongest (search_buf_size), hex_string (start_addr)); | |
08388c79 DE |
2358 | return -1; |
2359 | } | |
2360 | ||
2361 | /* Perform the search. | |
2362 | ||
2363 | The loop is kept simple by allocating [N + pattern-length - 1] bytes. | |
2364 | When we've scanned N bytes we copy the trailing bytes to the start and | |
2365 | read in another N bytes. */ | |
2366 | ||
2367 | while (search_space_len >= pattern_len) | |
2368 | { | |
2369 | gdb_byte *found_ptr; | |
325fac50 PA |
2370 | unsigned nr_search_bytes |
2371 | = std::min (search_space_len, (ULONGEST) search_buf_size); | |
08388c79 | 2372 | |
26fcd5d7 | 2373 | found_ptr = (gdb_byte *) memmem (search_buf.data (), nr_search_bytes, |
d7f3ff3e | 2374 | pattern, pattern_len); |
08388c79 DE |
2375 | |
2376 | if (found_ptr != NULL) | |
2377 | { | |
26fcd5d7 | 2378 | CORE_ADDR found_addr = start_addr + (found_ptr - search_buf.data ()); |
5d502164 | 2379 | |
08388c79 | 2380 | *found_addrp = found_addr; |
08388c79 DE |
2381 | return 1; |
2382 | } | |
2383 | ||
2384 | /* Not found in this chunk, skip to next chunk. */ | |
2385 | ||
2386 | /* Don't let search_space_len wrap here, it's unsigned. */ | |
2387 | if (search_space_len >= chunk_size) | |
2388 | search_space_len -= chunk_size; | |
2389 | else | |
2390 | search_space_len = 0; | |
2391 | ||
2392 | if (search_space_len >= pattern_len) | |
2393 | { | |
2394 | unsigned keep_len = search_buf_size - chunk_size; | |
8a35fb51 | 2395 | CORE_ADDR read_addr = start_addr + chunk_size + keep_len; |
08388c79 DE |
2396 | int nr_to_read; |
2397 | ||
2398 | /* Copy the trailing part of the previous iteration to the front | |
2399 | of the buffer for the next iteration. */ | |
2400 | gdb_assert (keep_len == pattern_len - 1); | |
26fcd5d7 | 2401 | memcpy (&search_buf[0], &search_buf[chunk_size], keep_len); |
08388c79 | 2402 | |
325fac50 PA |
2403 | nr_to_read = std::min (search_space_len - keep_len, |
2404 | (ULONGEST) chunk_size); | |
08388c79 DE |
2405 | |
2406 | if (target_read (ops, TARGET_OBJECT_MEMORY, NULL, | |
26fcd5d7 | 2407 | &search_buf[keep_len], read_addr, |
08388c79 DE |
2408 | nr_to_read) != nr_to_read) |
2409 | { | |
b3dc46ff | 2410 | warning (_("Unable to access %s bytes of target " |
9b20d036 | 2411 | "memory at %s, halting search."), |
b3dc46ff | 2412 | plongest (nr_to_read), |
08388c79 | 2413 | hex_string (read_addr)); |
08388c79 DE |
2414 | return -1; |
2415 | } | |
2416 | ||
2417 | start_addr += chunk_size; | |
2418 | } | |
2419 | } | |
2420 | ||
2421 | /* Not found. */ | |
2422 | ||
08388c79 DE |
2423 | return 0; |
2424 | } | |
2425 | ||
58a5184e TT |
2426 | /* Default implementation of memory-searching. */ |
2427 | ||
2428 | static int | |
2429 | default_search_memory (struct target_ops *self, | |
2430 | CORE_ADDR start_addr, ULONGEST search_space_len, | |
2431 | const gdb_byte *pattern, ULONGEST pattern_len, | |
2432 | CORE_ADDR *found_addrp) | |
2433 | { | |
2434 | /* Start over from the top of the target stack. */ | |
2435 | return simple_search_memory (current_target.beneath, | |
2436 | start_addr, search_space_len, | |
2437 | pattern, pattern_len, found_addrp); | |
2438 | } | |
2439 | ||
08388c79 DE |
2440 | /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the |
2441 | sequence of bytes in PATTERN with length PATTERN_LEN. | |
2442 | ||
2443 | The result is 1 if found, 0 if not found, and -1 if there was an error | |
2444 | requiring halting of the search (e.g. memory read error). | |
2445 | If the pattern is found the address is recorded in FOUND_ADDRP. */ | |
2446 | ||
2447 | int | |
2448 | target_search_memory (CORE_ADDR start_addr, ULONGEST search_space_len, | |
2449 | const gdb_byte *pattern, ULONGEST pattern_len, | |
2450 | CORE_ADDR *found_addrp) | |
2451 | { | |
a7068b60 TT |
2452 | return current_target.to_search_memory (¤t_target, start_addr, |
2453 | search_space_len, | |
2454 | pattern, pattern_len, found_addrp); | |
08388c79 DE |
2455 | } |
2456 | ||
8edfe269 DJ |
2457 | /* Look through the currently pushed targets. If none of them will |
2458 | be able to restart the currently running process, issue an error | |
2459 | message. */ | |
2460 | ||
2461 | void | |
2462 | target_require_runnable (void) | |
2463 | { | |
2464 | struct target_ops *t; | |
2465 | ||
2466 | for (t = target_stack; t != NULL; t = t->beneath) | |
2467 | { | |
2468 | /* If this target knows how to create a new program, then | |
2469 | assume we will still be able to after killing the current | |
2470 | one. Either killing and mourning will not pop T, or else | |
2471 | find_default_run_target will find it again. */ | |
2472 | if (t->to_create_inferior != NULL) | |
2473 | return; | |
2474 | ||
548740d6 | 2475 | /* Do not worry about targets at certain strata that can not |
8edfe269 DJ |
2476 | create inferiors. Assume they will be pushed again if |
2477 | necessary, and continue to the process_stratum. */ | |
85e747d2 | 2478 | if (t->to_stratum == thread_stratum |
548740d6 | 2479 | || t->to_stratum == record_stratum |
85e747d2 | 2480 | || t->to_stratum == arch_stratum) |
8edfe269 DJ |
2481 | continue; |
2482 | ||
3e43a32a MS |
2483 | error (_("The \"%s\" target does not support \"run\". " |
2484 | "Try \"help target\" or \"continue\"."), | |
8edfe269 DJ |
2485 | t->to_shortname); |
2486 | } | |
2487 | ||
2488 | /* This function is only called if the target is running. In that | |
2489 | case there should have been a process_stratum target and it | |
c378eb4e | 2490 | should either know how to create inferiors, or not... */ |
9b20d036 | 2491 | internal_error (__FILE__, __LINE__, _("No targets found")); |
8edfe269 DJ |
2492 | } |
2493 | ||
6a3cb8e8 PA |
2494 | /* Whether GDB is allowed to fall back to the default run target for |
2495 | "run", "attach", etc. when no target is connected yet. */ | |
2496 | static int auto_connect_native_target = 1; | |
2497 | ||
2498 | static void | |
2499 | show_auto_connect_native_target (struct ui_file *file, int from_tty, | |
2500 | struct cmd_list_element *c, const char *value) | |
2501 | { | |
2502 | fprintf_filtered (file, | |
2503 | _("Whether GDB may automatically connect to the " | |
2504 | "native target is %s.\n"), | |
2505 | value); | |
2506 | } | |
2507 | ||
c906108c SS |
2508 | /* Look through the list of possible targets for a target that can |
2509 | execute a run or attach command without any other data. This is | |
2510 | used to locate the default process stratum. | |
2511 | ||
5f667f2d PA |
2512 | If DO_MESG is not NULL, the result is always valid (error() is |
2513 | called for errors); else, return NULL on error. */ | |
c906108c SS |
2514 | |
2515 | static struct target_ops * | |
a121b7c1 | 2516 | find_default_run_target (const char *do_mesg) |
c906108c | 2517 | { |
c906108c | 2518 | struct target_ops *runable = NULL; |
c906108c | 2519 | |
6a3cb8e8 | 2520 | if (auto_connect_native_target) |
c906108c | 2521 | { |
89a1c21a | 2522 | struct target_ops *t; |
6a3cb8e8 | 2523 | int count = 0; |
89a1c21a | 2524 | int i; |
6a3cb8e8 | 2525 | |
89a1c21a | 2526 | for (i = 0; VEC_iterate (target_ops_p, target_structs, i, t); ++i) |
c906108c | 2527 | { |
89a1c21a | 2528 | if (t->to_can_run != delegate_can_run && target_can_run (t)) |
6a3cb8e8 | 2529 | { |
89a1c21a | 2530 | runable = t; |
6a3cb8e8 PA |
2531 | ++count; |
2532 | } | |
c906108c | 2533 | } |
6a3cb8e8 PA |
2534 | |
2535 | if (count != 1) | |
2536 | runable = NULL; | |
c906108c SS |
2537 | } |
2538 | ||
6a3cb8e8 | 2539 | if (runable == NULL) |
5f667f2d PA |
2540 | { |
2541 | if (do_mesg) | |
2542 | error (_("Don't know how to %s. Try \"help target\"."), do_mesg); | |
2543 | else | |
2544 | return NULL; | |
2545 | } | |
c906108c SS |
2546 | |
2547 | return runable; | |
2548 | } | |
2549 | ||
b3ccfe11 | 2550 | /* See target.h. */ |
c906108c | 2551 | |
b3ccfe11 TT |
2552 | struct target_ops * |
2553 | find_attach_target (void) | |
c906108c SS |
2554 | { |
2555 | struct target_ops *t; | |
2556 | ||
b3ccfe11 TT |
2557 | /* If a target on the current stack can attach, use it. */ |
2558 | for (t = current_target.beneath; t != NULL; t = t->beneath) | |
2559 | { | |
2560 | if (t->to_attach != NULL) | |
2561 | break; | |
2562 | } | |
c906108c | 2563 | |
b3ccfe11 TT |
2564 | /* Otherwise, use the default run target for attaching. */ |
2565 | if (t == NULL) | |
2566 | t = find_default_run_target ("attach"); | |
b84876c2 | 2567 | |
b3ccfe11 | 2568 | return t; |
b84876c2 PA |
2569 | } |
2570 | ||
b3ccfe11 | 2571 | /* See target.h. */ |
b84876c2 | 2572 | |
b3ccfe11 TT |
2573 | struct target_ops * |
2574 | find_run_target (void) | |
9908b566 VP |
2575 | { |
2576 | struct target_ops *t; | |
2577 | ||
b3ccfe11 TT |
2578 | /* If a target on the current stack can attach, use it. */ |
2579 | for (t = current_target.beneath; t != NULL; t = t->beneath) | |
2580 | { | |
2581 | if (t->to_create_inferior != NULL) | |
2582 | break; | |
2583 | } | |
5d502164 | 2584 | |
b3ccfe11 TT |
2585 | /* Otherwise, use the default run target. */ |
2586 | if (t == NULL) | |
2587 | t = find_default_run_target ("run"); | |
9908b566 | 2588 | |
b3ccfe11 | 2589 | return t; |
9908b566 VP |
2590 | } |
2591 | ||
145b16a9 UW |
2592 | /* Implement the "info proc" command. */ |
2593 | ||
451b7c33 | 2594 | int |
7bc112c1 | 2595 | target_info_proc (const char *args, enum info_proc_what what) |
145b16a9 UW |
2596 | { |
2597 | struct target_ops *t; | |
2598 | ||
2599 | /* If we're already connected to something that can get us OS | |
2600 | related data, use it. Otherwise, try using the native | |
2601 | target. */ | |
2602 | if (current_target.to_stratum >= process_stratum) | |
2603 | t = current_target.beneath; | |
2604 | else | |
2605 | t = find_default_run_target (NULL); | |
2606 | ||
2607 | for (; t != NULL; t = t->beneath) | |
2608 | { | |
2609 | if (t->to_info_proc != NULL) | |
2610 | { | |
2611 | t->to_info_proc (t, args, what); | |
2612 | ||
2613 | if (targetdebug) | |
2614 | fprintf_unfiltered (gdb_stdlog, | |
2615 | "target_info_proc (\"%s\", %d)\n", args, what); | |
2616 | ||
451b7c33 | 2617 | return 1; |
145b16a9 UW |
2618 | } |
2619 | } | |
2620 | ||
451b7c33 | 2621 | return 0; |
145b16a9 UW |
2622 | } |
2623 | ||
03583c20 | 2624 | static int |
2bfc0540 | 2625 | find_default_supports_disable_randomization (struct target_ops *self) |
03583c20 UW |
2626 | { |
2627 | struct target_ops *t; | |
2628 | ||
2629 | t = find_default_run_target (NULL); | |
2630 | if (t && t->to_supports_disable_randomization) | |
2bfc0540 | 2631 | return (t->to_supports_disable_randomization) (t); |
03583c20 UW |
2632 | return 0; |
2633 | } | |
2634 | ||
2635 | int | |
2636 | target_supports_disable_randomization (void) | |
2637 | { | |
2638 | struct target_ops *t; | |
2639 | ||
2640 | for (t = ¤t_target; t != NULL; t = t->beneath) | |
2641 | if (t->to_supports_disable_randomization) | |
2bfc0540 | 2642 | return t->to_supports_disable_randomization (t); |
03583c20 UW |
2643 | |
2644 | return 0; | |
2645 | } | |
9908b566 | 2646 | |
1fb77080 SDJ |
2647 | /* See target/target.h. */ |
2648 | ||
2649 | int | |
2650 | target_supports_multi_process (void) | |
2651 | { | |
2652 | return (*current_target.to_supports_multi_process) (¤t_target); | |
2653 | } | |
2654 | ||
b7b030ad TT |
2655 | /* See target.h. */ |
2656 | ||
2657 | gdb::unique_xmalloc_ptr<char> | |
07e059b5 VP |
2658 | target_get_osdata (const char *type) |
2659 | { | |
07e059b5 VP |
2660 | struct target_ops *t; |
2661 | ||
739ef7fb PA |
2662 | /* If we're already connected to something that can get us OS |
2663 | related data, use it. Otherwise, try using the native | |
2664 | target. */ | |
2665 | if (current_target.to_stratum >= process_stratum) | |
6d097e65 | 2666 | t = current_target.beneath; |
739ef7fb PA |
2667 | else |
2668 | t = find_default_run_target ("get OS data"); | |
07e059b5 VP |
2669 | |
2670 | if (!t) | |
2671 | return NULL; | |
2672 | ||
6d097e65 | 2673 | return target_read_stralloc (t, TARGET_OBJECT_OSDATA, type); |
07e059b5 VP |
2674 | } |
2675 | ||
8eaff7cd TT |
2676 | static struct address_space * |
2677 | default_thread_address_space (struct target_ops *self, ptid_t ptid) | |
6c95b8df PA |
2678 | { |
2679 | struct inferior *inf; | |
6c95b8df PA |
2680 | |
2681 | /* Fall-back to the "main" address space of the inferior. */ | |
c9657e70 | 2682 | inf = find_inferior_ptid (ptid); |
6c95b8df PA |
2683 | |
2684 | if (inf == NULL || inf->aspace == NULL) | |
3e43a32a | 2685 | internal_error (__FILE__, __LINE__, |
9b20d036 MS |
2686 | _("Can't determine the current " |
2687 | "address space of thread %s\n"), | |
6c95b8df PA |
2688 | target_pid_to_str (ptid)); |
2689 | ||
2690 | return inf->aspace; | |
2691 | } | |
2692 | ||
8eaff7cd TT |
2693 | /* Determine the current address space of thread PTID. */ |
2694 | ||
2695 | struct address_space * | |
2696 | target_thread_address_space (ptid_t ptid) | |
2697 | { | |
2698 | struct address_space *aspace; | |
2699 | ||
2700 | aspace = current_target.to_thread_address_space (¤t_target, ptid); | |
2701 | gdb_assert (aspace != NULL); | |
2702 | ||
8eaff7cd TT |
2703 | return aspace; |
2704 | } | |
2705 | ||
7313baad UW |
2706 | |
2707 | /* Target file operations. */ | |
2708 | ||
2709 | static struct target_ops * | |
2710 | default_fileio_target (void) | |
2711 | { | |
2712 | /* If we're already connected to something that can perform | |
2713 | file I/O, use it. Otherwise, try using the native target. */ | |
2714 | if (current_target.to_stratum >= process_stratum) | |
2715 | return current_target.beneath; | |
2716 | else | |
2717 | return find_default_run_target ("file I/O"); | |
2718 | } | |
2719 | ||
1c4b552b GB |
2720 | /* File handle for target file operations. */ |
2721 | ||
2722 | typedef struct | |
2723 | { | |
2724 | /* The target on which this file is open. */ | |
2725 | struct target_ops *t; | |
2726 | ||
2727 | /* The file descriptor on the target. */ | |
2728 | int fd; | |
2729 | } fileio_fh_t; | |
2730 | ||
2731 | DEF_VEC_O (fileio_fh_t); | |
2732 | ||
2733 | /* Vector of currently open file handles. The value returned by | |
2734 | target_fileio_open and passed as the FD argument to other | |
2735 | target_fileio_* functions is an index into this vector. This | |
2736 | vector's entries are never freed; instead, files are marked as | |
2737 | closed, and the handle becomes available for reuse. */ | |
2738 | static VEC (fileio_fh_t) *fileio_fhandles; | |
2739 | ||
2740 | /* Macro to check whether a fileio_fh_t represents a closed file. */ | |
2741 | #define is_closed_fileio_fh(fd) ((fd) < 0) | |
2742 | ||
2743 | /* Index into fileio_fhandles of the lowest handle that might be | |
2744 | closed. This permits handle reuse without searching the whole | |
2745 | list each time a new file is opened. */ | |
2746 | static int lowest_closed_fd; | |
2747 | ||
2748 | /* Acquire a target fileio file descriptor. */ | |
2749 | ||
2750 | static int | |
2751 | acquire_fileio_fd (struct target_ops *t, int fd) | |
2752 | { | |
870f88f7 | 2753 | fileio_fh_t *fh; |
1c4b552b GB |
2754 | |
2755 | gdb_assert (!is_closed_fileio_fh (fd)); | |
2756 | ||
2757 | /* Search for closed handles to reuse. */ | |
2758 | for (; | |
2759 | VEC_iterate (fileio_fh_t, fileio_fhandles, | |
2760 | lowest_closed_fd, fh); | |
2761 | lowest_closed_fd++) | |
2762 | if (is_closed_fileio_fh (fh->fd)) | |
2763 | break; | |
2764 | ||
2765 | /* Push a new handle if no closed handles were found. */ | |
2766 | if (lowest_closed_fd == VEC_length (fileio_fh_t, fileio_fhandles)) | |
2767 | fh = VEC_safe_push (fileio_fh_t, fileio_fhandles, NULL); | |
2768 | ||
2769 | /* Fill in the handle. */ | |
2770 | fh->t = t; | |
2771 | fh->fd = fd; | |
2772 | ||
2773 | /* Return its index, and start the next lookup at | |
2774 | the next index. */ | |
2775 | return lowest_closed_fd++; | |
2776 | } | |
2777 | ||
2778 | /* Release a target fileio file descriptor. */ | |
2779 | ||
2780 | static void | |
2781 | release_fileio_fd (int fd, fileio_fh_t *fh) | |
2782 | { | |
2783 | fh->fd = -1; | |
325fac50 | 2784 | lowest_closed_fd = std::min (lowest_closed_fd, fd); |
1c4b552b GB |
2785 | } |
2786 | ||
2787 | /* Return a pointer to the fileio_fhandle_t corresponding to FD. */ | |
2788 | ||
2789 | #define fileio_fd_to_fh(fd) \ | |
2790 | VEC_index (fileio_fh_t, fileio_fhandles, (fd)) | |
2791 | ||
4313b8c0 GB |
2792 | /* Helper for target_fileio_open and |
2793 | target_fileio_open_warn_if_slow. */ | |
12e2a5fd | 2794 | |
4313b8c0 GB |
2795 | static int |
2796 | target_fileio_open_1 (struct inferior *inf, const char *filename, | |
2797 | int flags, int mode, int warn_if_slow, | |
2798 | int *target_errno) | |
7313baad UW |
2799 | { |
2800 | struct target_ops *t; | |
2801 | ||
2802 | for (t = default_fileio_target (); t != NULL; t = t->beneath) | |
2803 | { | |
2804 | if (t->to_fileio_open != NULL) | |
2805 | { | |
07c138c8 | 2806 | int fd = t->to_fileio_open (t, inf, filename, flags, mode, |
4313b8c0 | 2807 | warn_if_slow, target_errno); |
7313baad | 2808 | |
1c4b552b GB |
2809 | if (fd < 0) |
2810 | fd = -1; | |
2811 | else | |
2812 | fd = acquire_fileio_fd (t, fd); | |
2813 | ||
7313baad UW |
2814 | if (targetdebug) |
2815 | fprintf_unfiltered (gdb_stdlog, | |
4313b8c0 | 2816 | "target_fileio_open (%d,%s,0x%x,0%o,%d)" |
07c138c8 GB |
2817 | " = %d (%d)\n", |
2818 | inf == NULL ? 0 : inf->num, | |
7313baad | 2819 | filename, flags, mode, |
4313b8c0 GB |
2820 | warn_if_slow, fd, |
2821 | fd != -1 ? 0 : *target_errno); | |
7313baad UW |
2822 | return fd; |
2823 | } | |
2824 | } | |
2825 | ||
2826 | *target_errno = FILEIO_ENOSYS; | |
2827 | return -1; | |
2828 | } | |
2829 | ||
12e2a5fd GB |
2830 | /* See target.h. */ |
2831 | ||
4313b8c0 GB |
2832 | int |
2833 | target_fileio_open (struct inferior *inf, const char *filename, | |
2834 | int flags, int mode, int *target_errno) | |
2835 | { | |
2836 | return target_fileio_open_1 (inf, filename, flags, mode, 0, | |
2837 | target_errno); | |
2838 | } | |
2839 | ||
2840 | /* See target.h. */ | |
2841 | ||
2842 | int | |
2843 | target_fileio_open_warn_if_slow (struct inferior *inf, | |
2844 | const char *filename, | |
2845 | int flags, int mode, int *target_errno) | |
2846 | { | |
2847 | return target_fileio_open_1 (inf, filename, flags, mode, 1, | |
2848 | target_errno); | |
2849 | } | |
2850 | ||
2851 | /* See target.h. */ | |
2852 | ||
7313baad UW |
2853 | int |
2854 | target_fileio_pwrite (int fd, const gdb_byte *write_buf, int len, | |
2855 | ULONGEST offset, int *target_errno) | |
2856 | { | |
1c4b552b GB |
2857 | fileio_fh_t *fh = fileio_fd_to_fh (fd); |
2858 | int ret = -1; | |
7313baad | 2859 | |
1c4b552b GB |
2860 | if (is_closed_fileio_fh (fh->fd)) |
2861 | *target_errno = EBADF; | |
2862 | else | |
2863 | ret = fh->t->to_fileio_pwrite (fh->t, fh->fd, write_buf, | |
2864 | len, offset, target_errno); | |
7313baad | 2865 | |
1c4b552b GB |
2866 | if (targetdebug) |
2867 | fprintf_unfiltered (gdb_stdlog, | |
2868 | "target_fileio_pwrite (%d,...,%d,%s) " | |
2869 | "= %d (%d)\n", | |
2870 | fd, len, pulongest (offset), | |
2871 | ret, ret != -1 ? 0 : *target_errno); | |
2872 | return ret; | |
7313baad UW |
2873 | } |
2874 | ||
12e2a5fd GB |
2875 | /* See target.h. */ |
2876 | ||
7313baad UW |
2877 | int |
2878 | target_fileio_pread (int fd, gdb_byte *read_buf, int len, | |
2879 | ULONGEST offset, int *target_errno) | |
2880 | { | |
1c4b552b GB |
2881 | fileio_fh_t *fh = fileio_fd_to_fh (fd); |
2882 | int ret = -1; | |
7313baad | 2883 | |
1c4b552b GB |
2884 | if (is_closed_fileio_fh (fh->fd)) |
2885 | *target_errno = EBADF; | |
2886 | else | |
2887 | ret = fh->t->to_fileio_pread (fh->t, fh->fd, read_buf, | |
2888 | len, offset, target_errno); | |
7313baad | 2889 | |
1c4b552b GB |
2890 | if (targetdebug) |
2891 | fprintf_unfiltered (gdb_stdlog, | |
2892 | "target_fileio_pread (%d,...,%d,%s) " | |
2893 | "= %d (%d)\n", | |
2894 | fd, len, pulongest (offset), | |
2895 | ret, ret != -1 ? 0 : *target_errno); | |
9b15c1f0 GB |
2896 | return ret; |
2897 | } | |
2898 | ||
2899 | /* See target.h. */ | |
12e2a5fd | 2900 | |
9b15c1f0 GB |
2901 | int |
2902 | target_fileio_fstat (int fd, struct stat *sb, int *target_errno) | |
2903 | { | |
2904 | fileio_fh_t *fh = fileio_fd_to_fh (fd); | |
2905 | int ret = -1; | |
2906 | ||
2907 | if (is_closed_fileio_fh (fh->fd)) | |
2908 | *target_errno = EBADF; | |
2909 | else | |
2910 | ret = fh->t->to_fileio_fstat (fh->t, fh->fd, sb, target_errno); | |
2911 | ||
2912 | if (targetdebug) | |
2913 | fprintf_unfiltered (gdb_stdlog, | |
2914 | "target_fileio_fstat (%d) = %d (%d)\n", | |
2915 | fd, ret, ret != -1 ? 0 : *target_errno); | |
1c4b552b | 2916 | return ret; |
7313baad UW |
2917 | } |
2918 | ||
12e2a5fd GB |
2919 | /* See target.h. */ |
2920 | ||
7313baad UW |
2921 | int |
2922 | target_fileio_close (int fd, int *target_errno) | |
2923 | { | |
1c4b552b GB |
2924 | fileio_fh_t *fh = fileio_fd_to_fh (fd); |
2925 | int ret = -1; | |
7313baad | 2926 | |
1c4b552b GB |
2927 | if (is_closed_fileio_fh (fh->fd)) |
2928 | *target_errno = EBADF; | |
2929 | else | |
7313baad | 2930 | { |
1c4b552b GB |
2931 | ret = fh->t->to_fileio_close (fh->t, fh->fd, target_errno); |
2932 | release_fileio_fd (fd, fh); | |
7313baad UW |
2933 | } |
2934 | ||
1c4b552b GB |
2935 | if (targetdebug) |
2936 | fprintf_unfiltered (gdb_stdlog, | |
2937 | "target_fileio_close (%d) = %d (%d)\n", | |
2938 | fd, ret, ret != -1 ? 0 : *target_errno); | |
2939 | return ret; | |
7313baad UW |
2940 | } |
2941 | ||
12e2a5fd GB |
2942 | /* See target.h. */ |
2943 | ||
7313baad | 2944 | int |
07c138c8 GB |
2945 | target_fileio_unlink (struct inferior *inf, const char *filename, |
2946 | int *target_errno) | |
7313baad UW |
2947 | { |
2948 | struct target_ops *t; | |
2949 | ||
2950 | for (t = default_fileio_target (); t != NULL; t = t->beneath) | |
2951 | { | |
2952 | if (t->to_fileio_unlink != NULL) | |
2953 | { | |
07c138c8 GB |
2954 | int ret = t->to_fileio_unlink (t, inf, filename, |
2955 | target_errno); | |
7313baad UW |
2956 | |
2957 | if (targetdebug) | |
2958 | fprintf_unfiltered (gdb_stdlog, | |
07c138c8 GB |
2959 | "target_fileio_unlink (%d,%s)" |
2960 | " = %d (%d)\n", | |
2961 | inf == NULL ? 0 : inf->num, filename, | |
2962 | ret, ret != -1 ? 0 : *target_errno); | |
7313baad UW |
2963 | return ret; |
2964 | } | |
2965 | } | |
2966 | ||
2967 | *target_errno = FILEIO_ENOSYS; | |
2968 | return -1; | |
2969 | } | |
2970 | ||
12e2a5fd GB |
2971 | /* See target.h. */ |
2972 | ||
b9e7b9c3 | 2973 | char * |
07c138c8 GB |
2974 | target_fileio_readlink (struct inferior *inf, const char *filename, |
2975 | int *target_errno) | |
b9e7b9c3 UW |
2976 | { |
2977 | struct target_ops *t; | |
2978 | ||
2979 | for (t = default_fileio_target (); t != NULL; t = t->beneath) | |
2980 | { | |
2981 | if (t->to_fileio_readlink != NULL) | |
2982 | { | |
07c138c8 GB |
2983 | char *ret = t->to_fileio_readlink (t, inf, filename, |
2984 | target_errno); | |
b9e7b9c3 UW |
2985 | |
2986 | if (targetdebug) | |
2987 | fprintf_unfiltered (gdb_stdlog, | |
07c138c8 GB |
2988 | "target_fileio_readlink (%d,%s)" |
2989 | " = %s (%d)\n", | |
2990 | inf == NULL ? 0 : inf->num, | |
b9e7b9c3 UW |
2991 | filename, ret? ret : "(nil)", |
2992 | ret? 0 : *target_errno); | |
2993 | return ret; | |
2994 | } | |
2995 | } | |
2996 | ||
2997 | *target_errno = FILEIO_ENOSYS; | |
2998 | return NULL; | |
2999 | } | |
3000 | ||
7313baad UW |
3001 | static void |
3002 | target_fileio_close_cleanup (void *opaque) | |
3003 | { | |
3004 | int fd = *(int *) opaque; | |
3005 | int target_errno; | |
3006 | ||
3007 | target_fileio_close (fd, &target_errno); | |
3008 | } | |
3009 | ||
07c138c8 GB |
3010 | /* Read target file FILENAME, in the filesystem as seen by INF. If |
3011 | INF is NULL, use the filesystem seen by the debugger (GDB or, for | |
3012 | remote targets, the remote stub). Store the result in *BUF_P and | |
3013 | return the size of the transferred data. PADDING additional bytes | |
3014 | are available in *BUF_P. This is a helper function for | |
3015 | target_fileio_read_alloc; see the declaration of that function for | |
3016 | more information. */ | |
7313baad | 3017 | |
f7af1fcd JK |
3018 | static LONGEST |
3019 | target_fileio_read_alloc_1 (struct inferior *inf, const char *filename, | |
3020 | gdb_byte **buf_p, int padding) | |
3021 | { | |
3022 | struct cleanup *close_cleanup; | |
db1ff28b JK |
3023 | size_t buf_alloc, buf_pos; |
3024 | gdb_byte *buf; | |
3025 | LONGEST n; | |
3026 | int fd; | |
3027 | int target_errno; | |
f7af1fcd | 3028 | |
db1ff28b JK |
3029 | fd = target_fileio_open (inf, filename, FILEIO_O_RDONLY, 0700, |
3030 | &target_errno); | |
f7af1fcd JK |
3031 | if (fd == -1) |
3032 | return -1; | |
3033 | ||
3034 | close_cleanup = make_cleanup (target_fileio_close_cleanup, &fd); | |
db1ff28b JK |
3035 | |
3036 | /* Start by reading up to 4K at a time. The target will throttle | |
3037 | this number down if necessary. */ | |
3038 | buf_alloc = 4096; | |
224c3ddb | 3039 | buf = (gdb_byte *) xmalloc (buf_alloc); |
db1ff28b JK |
3040 | buf_pos = 0; |
3041 | while (1) | |
3042 | { | |
3043 | n = target_fileio_pread (fd, &buf[buf_pos], | |
3044 | buf_alloc - buf_pos - padding, buf_pos, | |
3045 | &target_errno); | |
3046 | if (n < 0) | |
3047 | { | |
3048 | /* An error occurred. */ | |
3049 | do_cleanups (close_cleanup); | |
3050 | xfree (buf); | |
3051 | return -1; | |
3052 | } | |
3053 | else if (n == 0) | |
3054 | { | |
3055 | /* Read all there was. */ | |
3056 | do_cleanups (close_cleanup); | |
3057 | if (buf_pos == 0) | |
3058 | xfree (buf); | |
3059 | else | |
3060 | *buf_p = buf; | |
3061 | return buf_pos; | |
3062 | } | |
3063 | ||
3064 | buf_pos += n; | |
3065 | ||
3066 | /* If the buffer is filling up, expand it. */ | |
3067 | if (buf_alloc < buf_pos * 2) | |
3068 | { | |
3069 | buf_alloc *= 2; | |
224c3ddb | 3070 | buf = (gdb_byte *) xrealloc (buf, buf_alloc); |
db1ff28b JK |
3071 | } |
3072 | ||
3073 | QUIT; | |
3074 | } | |
f7af1fcd JK |
3075 | } |
3076 | ||
12e2a5fd | 3077 | /* See target.h. */ |
7313baad UW |
3078 | |
3079 | LONGEST | |
07c138c8 GB |
3080 | target_fileio_read_alloc (struct inferior *inf, const char *filename, |
3081 | gdb_byte **buf_p) | |
7313baad | 3082 | { |
07c138c8 | 3083 | return target_fileio_read_alloc_1 (inf, filename, buf_p, 0); |
7313baad UW |
3084 | } |
3085 | ||
db1ff28b | 3086 | /* See target.h. */ |
f7af1fcd | 3087 | |
87028b87 | 3088 | gdb::unique_xmalloc_ptr<char> |
f7af1fcd JK |
3089 | target_fileio_read_stralloc (struct inferior *inf, const char *filename) |
3090 | { | |
db1ff28b JK |
3091 | gdb_byte *buffer; |
3092 | char *bufstr; | |
3093 | LONGEST i, transferred; | |
3094 | ||
3095 | transferred = target_fileio_read_alloc_1 (inf, filename, &buffer, 1); | |
3096 | bufstr = (char *) buffer; | |
3097 | ||
3098 | if (transferred < 0) | |
87028b87 | 3099 | return gdb::unique_xmalloc_ptr<char> (nullptr); |
db1ff28b JK |
3100 | |
3101 | if (transferred == 0) | |
87028b87 | 3102 | return gdb::unique_xmalloc_ptr<char> (xstrdup ("")); |
db1ff28b JK |
3103 | |
3104 | bufstr[transferred] = 0; | |
3105 | ||
3106 | /* Check for embedded NUL bytes; but allow trailing NULs. */ | |
3107 | for (i = strlen (bufstr); i < transferred; i++) | |
3108 | if (bufstr[i] != 0) | |
3109 | { | |
3110 | warning (_("target file %s " | |
3111 | "contained unexpected null characters"), | |
3112 | filename); | |
3113 | break; | |
3114 | } | |
3115 | ||
87028b87 | 3116 | return gdb::unique_xmalloc_ptr<char> (bufstr); |
f7af1fcd | 3117 | } |
7313baad | 3118 | |
db1ff28b | 3119 | |
e0d24f8d | 3120 | static int |
31568a15 TT |
3121 | default_region_ok_for_hw_watchpoint (struct target_ops *self, |
3122 | CORE_ADDR addr, int len) | |
e0d24f8d | 3123 | { |
f5656ead | 3124 | return (len <= gdbarch_ptr_bit (target_gdbarch ()) / TARGET_CHAR_BIT); |
ccaa32c7 GS |
3125 | } |
3126 | ||
5009afc5 AS |
3127 | static int |
3128 | default_watchpoint_addr_within_range (struct target_ops *target, | |
3129 | CORE_ADDR addr, | |
3130 | CORE_ADDR start, int length) | |
3131 | { | |
3132 | return addr >= start && addr < start + length; | |
3133 | } | |
3134 | ||
c2250ad1 UW |
3135 | static struct gdbarch * |
3136 | default_thread_architecture (struct target_ops *ops, ptid_t ptid) | |
3137 | { | |
5cd63fda PA |
3138 | inferior *inf = find_inferior_ptid (ptid); |
3139 | gdb_assert (inf != NULL); | |
3140 | return inf->gdbarch; | |
c2250ad1 UW |
3141 | } |
3142 | ||
c906108c | 3143 | static int |
555bbdeb TT |
3144 | return_zero (struct target_ops *ignore) |
3145 | { | |
3146 | return 0; | |
3147 | } | |
3148 | ||
3149 | static int | |
3150 | return_zero_has_execution (struct target_ops *ignore, ptid_t ignore2) | |
c906108c SS |
3151 | { |
3152 | return 0; | |
3153 | } | |
3154 | ||
ed9a39eb JM |
3155 | /* |
3156 | * Find the next target down the stack from the specified target. | |
3157 | */ | |
3158 | ||
3159 | struct target_ops * | |
fba45db2 | 3160 | find_target_beneath (struct target_ops *t) |
ed9a39eb | 3161 | { |
258b763a | 3162 | return t->beneath; |
ed9a39eb JM |
3163 | } |
3164 | ||
8b06beed TT |
3165 | /* See target.h. */ |
3166 | ||
3167 | struct target_ops * | |
3168 | find_target_at (enum strata stratum) | |
3169 | { | |
3170 | struct target_ops *t; | |
3171 | ||
3172 | for (t = current_target.beneath; t != NULL; t = t->beneath) | |
3173 | if (t->to_stratum == stratum) | |
3174 | return t; | |
3175 | ||
3176 | return NULL; | |
3177 | } | |
3178 | ||
c906108c | 3179 | \f |
0f48b757 PA |
3180 | |
3181 | /* See target.h */ | |
3182 | ||
3183 | void | |
3184 | target_announce_detach (int from_tty) | |
3185 | { | |
3186 | pid_t pid; | |
a121b7c1 | 3187 | const char *exec_file; |
0f48b757 PA |
3188 | |
3189 | if (!from_tty) | |
3190 | return; | |
3191 | ||
3192 | exec_file = get_exec_file (0); | |
3193 | if (exec_file == NULL) | |
3194 | exec_file = ""; | |
3195 | ||
3196 | pid = ptid_get_pid (inferior_ptid); | |
3197 | printf_unfiltered (_("Detaching from program: %s, %s\n"), exec_file, | |
3198 | target_pid_to_str (pid_to_ptid (pid))); | |
3199 | gdb_flush (gdb_stdout); | |
3200 | } | |
3201 | ||
c906108c SS |
3202 | /* The inferior process has died. Long live the inferior! */ |
3203 | ||
3204 | void | |
fba45db2 | 3205 | generic_mourn_inferior (void) |
c906108c | 3206 | { |
7f9f62ba | 3207 | ptid_t ptid; |
c906108c | 3208 | |
7f9f62ba | 3209 | ptid = inferior_ptid; |
39f77062 | 3210 | inferior_ptid = null_ptid; |
7f9f62ba | 3211 | |
f59f708a PA |
3212 | /* Mark breakpoints uninserted in case something tries to delete a |
3213 | breakpoint while we delete the inferior's threads (which would | |
3214 | fail, since the inferior is long gone). */ | |
3215 | mark_breakpoints_out (); | |
3216 | ||
7f9f62ba PA |
3217 | if (!ptid_equal (ptid, null_ptid)) |
3218 | { | |
3219 | int pid = ptid_get_pid (ptid); | |
6c95b8df | 3220 | exit_inferior (pid); |
7f9f62ba PA |
3221 | } |
3222 | ||
f59f708a PA |
3223 | /* Note this wipes step-resume breakpoints, so needs to be done |
3224 | after exit_inferior, which ends up referencing the step-resume | |
3225 | breakpoints through clear_thread_inferior_resources. */ | |
c906108c | 3226 | breakpoint_init_inferior (inf_exited); |
f59f708a | 3227 | |
c906108c SS |
3228 | registers_changed (); |
3229 | ||
c906108c SS |
3230 | reopen_exec_file (); |
3231 | reinit_frame_cache (); | |
3232 | ||
9a4105ab AC |
3233 | if (deprecated_detach_hook) |
3234 | deprecated_detach_hook (); | |
c906108c SS |
3235 | } |
3236 | \f | |
fd0a2a6f MK |
3237 | /* Convert a normal process ID to a string. Returns the string in a |
3238 | static buffer. */ | |
c906108c | 3239 | |
7a114964 | 3240 | const char * |
39f77062 | 3241 | normal_pid_to_str (ptid_t ptid) |
c906108c | 3242 | { |
fd0a2a6f | 3243 | static char buf[32]; |
c906108c | 3244 | |
5fff8fc0 | 3245 | xsnprintf (buf, sizeof buf, "process %d", ptid_get_pid (ptid)); |
c906108c SS |
3246 | return buf; |
3247 | } | |
3248 | ||
7a114964 | 3249 | static const char * |
770234d3 | 3250 | default_pid_to_str (struct target_ops *ops, ptid_t ptid) |
117de6a9 PA |
3251 | { |
3252 | return normal_pid_to_str (ptid); | |
3253 | } | |
3254 | ||
9b4eba8e HZ |
3255 | /* Error-catcher for target_find_memory_regions. */ |
3256 | static int | |
2e73927c TT |
3257 | dummy_find_memory_regions (struct target_ops *self, |
3258 | find_memory_region_ftype ignore1, void *ignore2) | |
be4d1333 | 3259 | { |
9b4eba8e | 3260 | error (_("Command not implemented for this target.")); |
be4d1333 MS |
3261 | return 0; |
3262 | } | |
3263 | ||
9b4eba8e HZ |
3264 | /* Error-catcher for target_make_corefile_notes. */ |
3265 | static char * | |
fc6691b2 TT |
3266 | dummy_make_corefile_notes (struct target_ops *self, |
3267 | bfd *ignore1, int *ignore2) | |
be4d1333 | 3268 | { |
9b4eba8e | 3269 | error (_("Command not implemented for this target.")); |
be4d1333 MS |
3270 | return NULL; |
3271 | } | |
3272 | ||
c906108c SS |
3273 | /* Set up the handful of non-empty slots needed by the dummy target |
3274 | vector. */ | |
3275 | ||
3276 | static void | |
fba45db2 | 3277 | init_dummy_target (void) |
c906108c SS |
3278 | { |
3279 | dummy_target.to_shortname = "None"; | |
3280 | dummy_target.to_longname = "None"; | |
3281 | dummy_target.to_doc = ""; | |
03583c20 UW |
3282 | dummy_target.to_supports_disable_randomization |
3283 | = find_default_supports_disable_randomization; | |
c906108c | 3284 | dummy_target.to_stratum = dummy_stratum; |
555bbdeb TT |
3285 | dummy_target.to_has_all_memory = return_zero; |
3286 | dummy_target.to_has_memory = return_zero; | |
3287 | dummy_target.to_has_stack = return_zero; | |
3288 | dummy_target.to_has_registers = return_zero; | |
3289 | dummy_target.to_has_execution = return_zero_has_execution; | |
c906108c | 3290 | dummy_target.to_magic = OPS_MAGIC; |
1101cb7b TT |
3291 | |
3292 | install_dummy_methods (&dummy_target); | |
c906108c | 3293 | } |
c906108c | 3294 | \f |
c906108c | 3295 | |
f1c07ab0 | 3296 | void |
460014f5 | 3297 | target_close (struct target_ops *targ) |
f1c07ab0 | 3298 | { |
7fdc1521 TT |
3299 | gdb_assert (!target_is_pushed (targ)); |
3300 | ||
f1c07ab0 | 3301 | if (targ->to_xclose != NULL) |
460014f5 | 3302 | targ->to_xclose (targ); |
f1c07ab0 | 3303 | else if (targ->to_close != NULL) |
de90e03d | 3304 | targ->to_close (targ); |
947b8855 PA |
3305 | |
3306 | if (targetdebug) | |
460014f5 | 3307 | fprintf_unfiltered (gdb_stdlog, "target_close ()\n"); |
f1c07ab0 AC |
3308 | } |
3309 | ||
28439f5e PA |
3310 | int |
3311 | target_thread_alive (ptid_t ptid) | |
c906108c | 3312 | { |
a7068b60 | 3313 | return current_target.to_thread_alive (¤t_target, ptid); |
28439f5e PA |
3314 | } |
3315 | ||
3316 | void | |
e8032dde | 3317 | target_update_thread_list (void) |
28439f5e | 3318 | { |
e8032dde | 3319 | current_target.to_update_thread_list (¤t_target); |
c906108c SS |
3320 | } |
3321 | ||
d914c394 SS |
3322 | void |
3323 | target_stop (ptid_t ptid) | |
3324 | { | |
3325 | if (!may_stop) | |
3326 | { | |
3327 | warning (_("May not interrupt or stop the target, ignoring attempt")); | |
3328 | return; | |
3329 | } | |
3330 | ||
1eab8a48 | 3331 | (*current_target.to_stop) (¤t_target, ptid); |
d914c394 SS |
3332 | } |
3333 | ||
bfedc46a PA |
3334 | void |
3335 | target_interrupt (ptid_t ptid) | |
3336 | { | |
3337 | if (!may_stop) | |
3338 | { | |
3339 | warning (_("May not interrupt or stop the target, ignoring attempt")); | |
3340 | return; | |
3341 | } | |
3342 | ||
3343 | (*current_target.to_interrupt) (¤t_target, ptid); | |
3344 | } | |
3345 | ||
abc56d60 PA |
3346 | /* See target.h. */ |
3347 | ||
93692b58 PA |
3348 | void |
3349 | target_pass_ctrlc (void) | |
3350 | { | |
3351 | (*current_target.to_pass_ctrlc) (¤t_target); | |
3352 | } | |
3353 | ||
3354 | /* See target.h. */ | |
3355 | ||
3356 | void | |
3357 | default_target_pass_ctrlc (struct target_ops *ops) | |
3358 | { | |
3359 | target_interrupt (inferior_ptid); | |
3360 | } | |
3361 | ||
f8c1d06b GB |
3362 | /* See target/target.h. */ |
3363 | ||
3364 | void | |
03f4463b | 3365 | target_stop_and_wait (ptid_t ptid) |
f8c1d06b GB |
3366 | { |
3367 | struct target_waitstatus status; | |
3368 | int was_non_stop = non_stop; | |
3369 | ||
3370 | non_stop = 1; | |
3371 | target_stop (ptid); | |
3372 | ||
3373 | memset (&status, 0, sizeof (status)); | |
3374 | target_wait (ptid, &status, 0); | |
3375 | ||
3376 | non_stop = was_non_stop; | |
3377 | } | |
3378 | ||
3379 | /* See target/target.h. */ | |
3380 | ||
3381 | void | |
03f4463b | 3382 | target_continue_no_signal (ptid_t ptid) |
f8c1d06b GB |
3383 | { |
3384 | target_resume (ptid, 0, GDB_SIGNAL_0); | |
3385 | } | |
3386 | ||
049a8570 SDJ |
3387 | /* See target/target.h. */ |
3388 | ||
3389 | void | |
3390 | target_continue (ptid_t ptid, enum gdb_signal signal) | |
3391 | { | |
3392 | target_resume (ptid, 0, signal); | |
3393 | } | |
3394 | ||
09826ec5 PA |
3395 | /* Concatenate ELEM to LIST, a comma separate list, and return the |
3396 | result. The LIST incoming argument is released. */ | |
3397 | ||
3398 | static char * | |
3399 | str_comma_list_concat_elem (char *list, const char *elem) | |
3400 | { | |
3401 | if (list == NULL) | |
3402 | return xstrdup (elem); | |
3403 | else | |
3404 | return reconcat (list, list, ", ", elem, (char *) NULL); | |
3405 | } | |
3406 | ||
3407 | /* Helper for target_options_to_string. If OPT is present in | |
3408 | TARGET_OPTIONS, append the OPT_STR (string version of OPT) in RET. | |
3409 | Returns the new resulting string. OPT is removed from | |
3410 | TARGET_OPTIONS. */ | |
3411 | ||
3412 | static char * | |
3413 | do_option (int *target_options, char *ret, | |
a121b7c1 | 3414 | int opt, const char *opt_str) |
09826ec5 PA |
3415 | { |
3416 | if ((*target_options & opt) != 0) | |
3417 | { | |
3418 | ret = str_comma_list_concat_elem (ret, opt_str); | |
3419 | *target_options &= ~opt; | |
3420 | } | |
3421 | ||
3422 | return ret; | |
3423 | } | |
3424 | ||
3425 | char * | |
3426 | target_options_to_string (int target_options) | |
3427 | { | |
3428 | char *ret = NULL; | |
3429 | ||
3430 | #define DO_TARG_OPTION(OPT) \ | |
3431 | ret = do_option (&target_options, ret, OPT, #OPT) | |
3432 | ||
3433 | DO_TARG_OPTION (TARGET_WNOHANG); | |
3434 | ||
3435 | if (target_options != 0) | |
3436 | ret = str_comma_list_concat_elem (ret, "unknown???"); | |
3437 | ||
3438 | if (ret == NULL) | |
3439 | ret = xstrdup (""); | |
3440 | return ret; | |
3441 | } | |
3442 | ||
28439f5e PA |
3443 | void |
3444 | target_fetch_registers (struct regcache *regcache, int regno) | |
c906108c | 3445 | { |
ad5989bd TT |
3446 | current_target.to_fetch_registers (¤t_target, regcache, regno); |
3447 | if (targetdebug) | |
ef79d9a3 | 3448 | regcache->debug_print_register ("target_fetch_registers", regno); |
c906108c SS |
3449 | } |
3450 | ||
28439f5e PA |
3451 | void |
3452 | target_store_registers (struct regcache *regcache, int regno) | |
c906108c | 3453 | { |
d914c394 SS |
3454 | if (!may_write_registers) |
3455 | error (_("Writing to registers is not allowed (regno %d)"), regno); | |
3456 | ||
6b84065d TT |
3457 | current_target.to_store_registers (¤t_target, regcache, regno); |
3458 | if (targetdebug) | |
28439f5e | 3459 | { |
ef79d9a3 | 3460 | regcache->debug_print_register ("target_store_registers", regno); |
28439f5e | 3461 | } |
c906108c SS |
3462 | } |
3463 | ||
dc146f7c VP |
3464 | int |
3465 | target_core_of_thread (ptid_t ptid) | |
3466 | { | |
a7068b60 | 3467 | return current_target.to_core_of_thread (¤t_target, ptid); |
dc146f7c VP |
3468 | } |
3469 | ||
936d2992 PA |
3470 | int |
3471 | simple_verify_memory (struct target_ops *ops, | |
3472 | const gdb_byte *data, CORE_ADDR lma, ULONGEST size) | |
3473 | { | |
3474 | LONGEST total_xfered = 0; | |
3475 | ||
3476 | while (total_xfered < size) | |
3477 | { | |
3478 | ULONGEST xfered_len; | |
3479 | enum target_xfer_status status; | |
3480 | gdb_byte buf[1024]; | |
768adc05 | 3481 | ULONGEST howmuch = std::min<ULONGEST> (sizeof (buf), size - total_xfered); |
936d2992 PA |
3482 | |
3483 | status = target_xfer_partial (ops, TARGET_OBJECT_MEMORY, NULL, | |
3484 | buf, NULL, lma + total_xfered, howmuch, | |
3485 | &xfered_len); | |
3486 | if (status == TARGET_XFER_OK | |
3487 | && memcmp (data + total_xfered, buf, xfered_len) == 0) | |
3488 | { | |
3489 | total_xfered += xfered_len; | |
3490 | QUIT; | |
3491 | } | |
3492 | else | |
3493 | return 0; | |
3494 | } | |
3495 | return 1; | |
3496 | } | |
3497 | ||
3498 | /* Default implementation of memory verification. */ | |
3499 | ||
3500 | static int | |
3501 | default_verify_memory (struct target_ops *self, | |
3502 | const gdb_byte *data, CORE_ADDR memaddr, ULONGEST size) | |
3503 | { | |
3504 | /* Start over from the top of the target stack. */ | |
3505 | return simple_verify_memory (current_target.beneath, | |
3506 | data, memaddr, size); | |
3507 | } | |
3508 | ||
4a5e7a5b PA |
3509 | int |
3510 | target_verify_memory (const gdb_byte *data, CORE_ADDR memaddr, ULONGEST size) | |
3511 | { | |
a7068b60 TT |
3512 | return current_target.to_verify_memory (¤t_target, |
3513 | data, memaddr, size); | |
4a5e7a5b PA |
3514 | } |
3515 | ||
9c06b0b4 TJB |
3516 | /* The documentation for this function is in its prototype declaration in |
3517 | target.h. */ | |
3518 | ||
3519 | int | |
f4b0a671 SM |
3520 | target_insert_mask_watchpoint (CORE_ADDR addr, CORE_ADDR mask, |
3521 | enum target_hw_bp_type rw) | |
9c06b0b4 | 3522 | { |
a7068b60 TT |
3523 | return current_target.to_insert_mask_watchpoint (¤t_target, |
3524 | addr, mask, rw); | |
9c06b0b4 TJB |
3525 | } |
3526 | ||
3527 | /* The documentation for this function is in its prototype declaration in | |
3528 | target.h. */ | |
3529 | ||
3530 | int | |
f4b0a671 SM |
3531 | target_remove_mask_watchpoint (CORE_ADDR addr, CORE_ADDR mask, |
3532 | enum target_hw_bp_type rw) | |
9c06b0b4 | 3533 | { |
a7068b60 TT |
3534 | return current_target.to_remove_mask_watchpoint (¤t_target, |
3535 | addr, mask, rw); | |
9c06b0b4 TJB |
3536 | } |
3537 | ||
3538 | /* The documentation for this function is in its prototype declaration | |
3539 | in target.h. */ | |
3540 | ||
3541 | int | |
3542 | target_masked_watch_num_registers (CORE_ADDR addr, CORE_ADDR mask) | |
3543 | { | |
6c7e5e5c TT |
3544 | return current_target.to_masked_watch_num_registers (¤t_target, |
3545 | addr, mask); | |
9c06b0b4 TJB |
3546 | } |
3547 | ||
f1310107 TJB |
3548 | /* The documentation for this function is in its prototype declaration |
3549 | in target.h. */ | |
3550 | ||
3551 | int | |
3552 | target_ranged_break_num_registers (void) | |
3553 | { | |
a134316b | 3554 | return current_target.to_ranged_break_num_registers (¤t_target); |
f1310107 TJB |
3555 | } |
3556 | ||
02d27625 MM |
3557 | /* See target.h. */ |
3558 | ||
043c3577 MM |
3559 | int |
3560 | target_supports_btrace (enum btrace_format format) | |
3561 | { | |
3562 | return current_target.to_supports_btrace (¤t_target, format); | |
3563 | } | |
3564 | ||
3565 | /* See target.h. */ | |
3566 | ||
02d27625 | 3567 | struct btrace_target_info * |
f4abbc16 | 3568 | target_enable_btrace (ptid_t ptid, const struct btrace_config *conf) |
02d27625 | 3569 | { |
f4abbc16 | 3570 | return current_target.to_enable_btrace (¤t_target, ptid, conf); |
02d27625 MM |
3571 | } |
3572 | ||
3573 | /* See target.h. */ | |
3574 | ||
3575 | void | |
3576 | target_disable_btrace (struct btrace_target_info *btinfo) | |
3577 | { | |
8dc292d3 | 3578 | current_target.to_disable_btrace (¤t_target, btinfo); |
02d27625 MM |
3579 | } |
3580 | ||
3581 | /* See target.h. */ | |
3582 | ||
3583 | void | |
3584 | target_teardown_btrace (struct btrace_target_info *btinfo) | |
3585 | { | |
9ace480d | 3586 | current_target.to_teardown_btrace (¤t_target, btinfo); |
02d27625 MM |
3587 | } |
3588 | ||
3589 | /* See target.h. */ | |
3590 | ||
969c39fb | 3591 | enum btrace_error |
734b0e4b | 3592 | target_read_btrace (struct btrace_data *btrace, |
969c39fb | 3593 | struct btrace_target_info *btinfo, |
02d27625 MM |
3594 | enum btrace_read_type type) |
3595 | { | |
eb5b20d4 | 3596 | return current_target.to_read_btrace (¤t_target, btrace, btinfo, type); |
02d27625 MM |
3597 | } |
3598 | ||
d02ed0bb MM |
3599 | /* See target.h. */ |
3600 | ||
f4abbc16 MM |
3601 | const struct btrace_config * |
3602 | target_btrace_conf (const struct btrace_target_info *btinfo) | |
3603 | { | |
3604 | return current_target.to_btrace_conf (¤t_target, btinfo); | |
3605 | } | |
3606 | ||
3607 | /* See target.h. */ | |
3608 | ||
7c1687a9 MM |
3609 | void |
3610 | target_stop_recording (void) | |
3611 | { | |
ee97f592 | 3612 | current_target.to_stop_recording (¤t_target); |
7c1687a9 MM |
3613 | } |
3614 | ||
3615 | /* See target.h. */ | |
3616 | ||
d02ed0bb | 3617 | void |
85e1311a | 3618 | target_save_record (const char *filename) |
d02ed0bb | 3619 | { |
f09e2107 | 3620 | current_target.to_save_record (¤t_target, filename); |
d02ed0bb MM |
3621 | } |
3622 | ||
3623 | /* See target.h. */ | |
3624 | ||
3625 | int | |
3626 | target_supports_delete_record (void) | |
3627 | { | |
3628 | struct target_ops *t; | |
3629 | ||
3630 | for (t = current_target.beneath; t != NULL; t = t->beneath) | |
b0ed115f TT |
3631 | if (t->to_delete_record != delegate_delete_record |
3632 | && t->to_delete_record != tdefault_delete_record) | |
d02ed0bb MM |
3633 | return 1; |
3634 | ||
3635 | return 0; | |
3636 | } | |
3637 | ||
3638 | /* See target.h. */ | |
3639 | ||
3640 | void | |
3641 | target_delete_record (void) | |
3642 | { | |
07366925 | 3643 | current_target.to_delete_record (¤t_target); |
d02ed0bb MM |
3644 | } |
3645 | ||
3646 | /* See target.h. */ | |
3647 | ||
b158a20f TW |
3648 | enum record_method |
3649 | target_record_method (ptid_t ptid) | |
3650 | { | |
3651 | return current_target.to_record_method (¤t_target, ptid); | |
3652 | } | |
3653 | ||
3654 | /* See target.h. */ | |
3655 | ||
d02ed0bb | 3656 | int |
a52eab48 | 3657 | target_record_is_replaying (ptid_t ptid) |
d02ed0bb | 3658 | { |
a52eab48 | 3659 | return current_target.to_record_is_replaying (¤t_target, ptid); |
d02ed0bb MM |
3660 | } |
3661 | ||
3662 | /* See target.h. */ | |
3663 | ||
7ff27e9b MM |
3664 | int |
3665 | target_record_will_replay (ptid_t ptid, int dir) | |
3666 | { | |
3667 | return current_target.to_record_will_replay (¤t_target, ptid, dir); | |
3668 | } | |
3669 | ||
3670 | /* See target.h. */ | |
3671 | ||
797094dd MM |
3672 | void |
3673 | target_record_stop_replaying (void) | |
3674 | { | |
3675 | current_target.to_record_stop_replaying (¤t_target); | |
3676 | } | |
3677 | ||
3678 | /* See target.h. */ | |
3679 | ||
d02ed0bb MM |
3680 | void |
3681 | target_goto_record_begin (void) | |
3682 | { | |
671e76cc | 3683 | current_target.to_goto_record_begin (¤t_target); |
d02ed0bb MM |
3684 | } |
3685 | ||
3686 | /* See target.h. */ | |
3687 | ||
3688 | void | |
3689 | target_goto_record_end (void) | |
3690 | { | |
e9179bb3 | 3691 | current_target.to_goto_record_end (¤t_target); |
d02ed0bb MM |
3692 | } |
3693 | ||
3694 | /* See target.h. */ | |
3695 | ||
3696 | void | |
3697 | target_goto_record (ULONGEST insn) | |
3698 | { | |
05969c84 | 3699 | current_target.to_goto_record (¤t_target, insn); |
d02ed0bb MM |
3700 | } |
3701 | ||
67c86d06 MM |
3702 | /* See target.h. */ |
3703 | ||
3704 | void | |
9a24775b | 3705 | target_insn_history (int size, gdb_disassembly_flags flags) |
67c86d06 | 3706 | { |
3679abfa | 3707 | current_target.to_insn_history (¤t_target, size, flags); |
67c86d06 MM |
3708 | } |
3709 | ||
3710 | /* See target.h. */ | |
3711 | ||
3712 | void | |
9a24775b PA |
3713 | target_insn_history_from (ULONGEST from, int size, |
3714 | gdb_disassembly_flags flags) | |
67c86d06 | 3715 | { |
8444ab58 | 3716 | current_target.to_insn_history_from (¤t_target, from, size, flags); |
67c86d06 MM |
3717 | } |
3718 | ||
3719 | /* See target.h. */ | |
3720 | ||
3721 | void | |
9a24775b PA |
3722 | target_insn_history_range (ULONGEST begin, ULONGEST end, |
3723 | gdb_disassembly_flags flags) | |
67c86d06 | 3724 | { |
c29302cc | 3725 | current_target.to_insn_history_range (¤t_target, begin, end, flags); |
67c86d06 MM |
3726 | } |
3727 | ||
15984c13 MM |
3728 | /* See target.h. */ |
3729 | ||
3730 | void | |
3731 | target_call_history (int size, int flags) | |
3732 | { | |
170049d4 | 3733 | current_target.to_call_history (¤t_target, size, flags); |
15984c13 MM |
3734 | } |
3735 | ||
3736 | /* See target.h. */ | |
3737 | ||
3738 | void | |
3739 | target_call_history_from (ULONGEST begin, int size, int flags) | |
3740 | { | |
16fc27d6 | 3741 | current_target.to_call_history_from (¤t_target, begin, size, flags); |
15984c13 MM |
3742 | } |
3743 | ||
3744 | /* See target.h. */ | |
3745 | ||
3746 | void | |
3747 | target_call_history_range (ULONGEST begin, ULONGEST end, int flags) | |
3748 | { | |
115d9817 | 3749 | current_target.to_call_history_range (¤t_target, begin, end, flags); |
15984c13 MM |
3750 | } |
3751 | ||
ea001bdc MM |
3752 | /* See target.h. */ |
3753 | ||
3754 | const struct frame_unwind * | |
3755 | target_get_unwinder (void) | |
3756 | { | |
ac01945b | 3757 | return current_target.to_get_unwinder (¤t_target); |
ea001bdc MM |
3758 | } |
3759 | ||
3760 | /* See target.h. */ | |
3761 | ||
3762 | const struct frame_unwind * | |
3763 | target_get_tailcall_unwinder (void) | |
3764 | { | |
ac01945b | 3765 | return current_target.to_get_tailcall_unwinder (¤t_target); |
ea001bdc MM |
3766 | } |
3767 | ||
5fff78c4 MM |
3768 | /* See target.h. */ |
3769 | ||
3770 | void | |
3771 | target_prepare_to_generate_core (void) | |
3772 | { | |
3773 | current_target.to_prepare_to_generate_core (¤t_target); | |
3774 | } | |
3775 | ||
3776 | /* See target.h. */ | |
3777 | ||
3778 | void | |
3779 | target_done_generating_core (void) | |
3780 | { | |
3781 | current_target.to_done_generating_core (¤t_target); | |
3782 | } | |
3783 | ||
c906108c | 3784 | static void |
fba45db2 | 3785 | setup_target_debug (void) |
c906108c SS |
3786 | { |
3787 | memcpy (&debug_target, ¤t_target, sizeof debug_target); | |
3788 | ||
a7068b60 | 3789 | init_debug_target (¤t_target); |
c906108c | 3790 | } |
c906108c | 3791 | \f |
c5aa993b JM |
3792 | |
3793 | static char targ_desc[] = | |
3e43a32a MS |
3794 | "Names of targets and files being debugged.\nShows the entire \ |
3795 | stack of targets currently in use (including the exec-file,\n\ | |
c906108c SS |
3796 | core-file, and process, if any), as well as the symbol file name."; |
3797 | ||
a53f3625 | 3798 | static void |
a30bf1f1 TT |
3799 | default_rcmd (struct target_ops *self, const char *command, |
3800 | struct ui_file *output) | |
a53f3625 TT |
3801 | { |
3802 | error (_("\"monitor\" command not supported by this target.")); | |
3803 | } | |
3804 | ||
96baa820 | 3805 | static void |
0b39b52e | 3806 | do_monitor_command (const char *cmd, int from_tty) |
96baa820 | 3807 | { |
96baa820 JM |
3808 | target_rcmd (cmd, gdb_stdtarg); |
3809 | } | |
3810 | ||
78cbbba8 LM |
3811 | /* Erases all the memory regions marked as flash. CMD and FROM_TTY are |
3812 | ignored. */ | |
3813 | ||
3814 | void | |
0b39b52e | 3815 | flash_erase_command (const char *cmd, int from_tty) |
78cbbba8 LM |
3816 | { |
3817 | /* Used to communicate termination of flash operations to the target. */ | |
3818 | bool found_flash_region = false; | |
78cbbba8 LM |
3819 | struct gdbarch *gdbarch = target_gdbarch (); |
3820 | ||
a664f67e | 3821 | std::vector<mem_region> mem_regions = target_memory_map (); |
78cbbba8 LM |
3822 | |
3823 | /* Iterate over all memory regions. */ | |
a664f67e | 3824 | for (const mem_region &m : mem_regions) |
78cbbba8 | 3825 | { |
78cbbba8 | 3826 | /* Is this a flash memory region? */ |
a664f67e | 3827 | if (m.attrib.mode == MEM_FLASH) |
78cbbba8 LM |
3828 | { |
3829 | found_flash_region = true; | |
a664f67e | 3830 | target_flash_erase (m.lo, m.hi - m.lo); |
78cbbba8 | 3831 | |
76f9c9cf | 3832 | ui_out_emit_tuple tuple_emitter (current_uiout, "erased-regions"); |
78cbbba8 LM |
3833 | |
3834 | current_uiout->message (_("Erasing flash memory region at address ")); | |
a664f67e | 3835 | current_uiout->field_fmt ("address", "%s", paddress (gdbarch, m.lo)); |
78cbbba8 | 3836 | current_uiout->message (", size = "); |
a664f67e | 3837 | current_uiout->field_fmt ("size", "%s", hex_string (m.hi - m.lo)); |
78cbbba8 | 3838 | current_uiout->message ("\n"); |
78cbbba8 LM |
3839 | } |
3840 | } | |
3841 | ||
3842 | /* Did we do any flash operations? If so, we need to finalize them. */ | |
3843 | if (found_flash_region) | |
3844 | target_flash_done (); | |
3845 | else | |
3846 | current_uiout->message (_("No flash memory regions found.\n")); | |
3847 | } | |
3848 | ||
87680a14 JB |
3849 | /* Print the name of each layers of our target stack. */ |
3850 | ||
3851 | static void | |
d3cb6b99 | 3852 | maintenance_print_target_stack (const char *cmd, int from_tty) |
87680a14 JB |
3853 | { |
3854 | struct target_ops *t; | |
3855 | ||
3856 | printf_filtered (_("The current target stack is:\n")); | |
3857 | ||
3858 | for (t = target_stack; t != NULL; t = t->beneath) | |
3859 | { | |
3860 | printf_filtered (" - %s (%s)\n", t->to_shortname, t->to_longname); | |
3861 | } | |
3862 | } | |
3863 | ||
372316f1 PA |
3864 | /* See target.h. */ |
3865 | ||
3866 | void | |
3867 | target_async (int enable) | |
3868 | { | |
3869 | infrun_async (enable); | |
3870 | current_target.to_async (¤t_target, enable); | |
3871 | } | |
3872 | ||
65706a29 PA |
3873 | /* See target.h. */ |
3874 | ||
3875 | void | |
3876 | target_thread_events (int enable) | |
3877 | { | |
3878 | current_target.to_thread_events (¤t_target, enable); | |
3879 | } | |
3880 | ||
329ea579 PA |
3881 | /* Controls if targets can report that they can/are async. This is |
3882 | just for maintainers to use when debugging gdb. */ | |
3883 | int target_async_permitted = 1; | |
c6ebd6cf VP |
3884 | |
3885 | /* The set command writes to this variable. If the inferior is | |
b5419e49 | 3886 | executing, target_async_permitted is *not* updated. */ |
329ea579 | 3887 | static int target_async_permitted_1 = 1; |
c6ebd6cf VP |
3888 | |
3889 | static void | |
eb4c3f4a | 3890 | maint_set_target_async_command (const char *args, int from_tty, |
329ea579 | 3891 | struct cmd_list_element *c) |
c6ebd6cf | 3892 | { |
c35b1492 | 3893 | if (have_live_inferiors ()) |
c6ebd6cf VP |
3894 | { |
3895 | target_async_permitted_1 = target_async_permitted; | |
3896 | error (_("Cannot change this setting while the inferior is running.")); | |
3897 | } | |
3898 | ||
3899 | target_async_permitted = target_async_permitted_1; | |
3900 | } | |
3901 | ||
3902 | static void | |
329ea579 PA |
3903 | maint_show_target_async_command (struct ui_file *file, int from_tty, |
3904 | struct cmd_list_element *c, | |
3905 | const char *value) | |
c6ebd6cf | 3906 | { |
3e43a32a MS |
3907 | fprintf_filtered (file, |
3908 | _("Controlling the inferior in " | |
3909 | "asynchronous mode is %s.\n"), value); | |
c6ebd6cf VP |
3910 | } |
3911 | ||
fbea99ea PA |
3912 | /* Return true if the target operates in non-stop mode even with "set |
3913 | non-stop off". */ | |
3914 | ||
3915 | static int | |
3916 | target_always_non_stop_p (void) | |
3917 | { | |
3918 | return current_target.to_always_non_stop_p (¤t_target); | |
3919 | } | |
3920 | ||
3921 | /* See target.h. */ | |
3922 | ||
3923 | int | |
3924 | target_is_non_stop_p (void) | |
3925 | { | |
3926 | return (non_stop | |
3927 | || target_non_stop_enabled == AUTO_BOOLEAN_TRUE | |
3928 | || (target_non_stop_enabled == AUTO_BOOLEAN_AUTO | |
3929 | && target_always_non_stop_p ())); | |
3930 | } | |
3931 | ||
3932 | /* Controls if targets can report that they always run in non-stop | |
3933 | mode. This is just for maintainers to use when debugging gdb. */ | |
3934 | enum auto_boolean target_non_stop_enabled = AUTO_BOOLEAN_AUTO; | |
3935 | ||
3936 | /* The set command writes to this variable. If the inferior is | |
3937 | executing, target_non_stop_enabled is *not* updated. */ | |
3938 | static enum auto_boolean target_non_stop_enabled_1 = AUTO_BOOLEAN_AUTO; | |
3939 | ||
3940 | /* Implementation of "maint set target-non-stop". */ | |
3941 | ||
3942 | static void | |
eb4c3f4a | 3943 | maint_set_target_non_stop_command (const char *args, int from_tty, |
fbea99ea PA |
3944 | struct cmd_list_element *c) |
3945 | { | |
3946 | if (have_live_inferiors ()) | |
3947 | { | |
3948 | target_non_stop_enabled_1 = target_non_stop_enabled; | |
3949 | error (_("Cannot change this setting while the inferior is running.")); | |
3950 | } | |
3951 | ||
3952 | target_non_stop_enabled = target_non_stop_enabled_1; | |
3953 | } | |
3954 | ||
3955 | /* Implementation of "maint show target-non-stop". */ | |
3956 | ||
3957 | static void | |
3958 | maint_show_target_non_stop_command (struct ui_file *file, int from_tty, | |
3959 | struct cmd_list_element *c, | |
3960 | const char *value) | |
3961 | { | |
3962 | if (target_non_stop_enabled == AUTO_BOOLEAN_AUTO) | |
3963 | fprintf_filtered (file, | |
3964 | _("Whether the target is always in non-stop mode " | |
3965 | "is %s (currently %s).\n"), value, | |
3966 | target_always_non_stop_p () ? "on" : "off"); | |
3967 | else | |
3968 | fprintf_filtered (file, | |
3969 | _("Whether the target is always in non-stop mode " | |
3970 | "is %s.\n"), value); | |
3971 | } | |
3972 | ||
d914c394 SS |
3973 | /* Temporary copies of permission settings. */ |
3974 | ||
3975 | static int may_write_registers_1 = 1; | |
3976 | static int may_write_memory_1 = 1; | |
3977 | static int may_insert_breakpoints_1 = 1; | |
3978 | static int may_insert_tracepoints_1 = 1; | |
3979 | static int may_insert_fast_tracepoints_1 = 1; | |
3980 | static int may_stop_1 = 1; | |
3981 | ||
3982 | /* Make the user-set values match the real values again. */ | |
3983 | ||
3984 | void | |
3985 | update_target_permissions (void) | |
3986 | { | |
3987 | may_write_registers_1 = may_write_registers; | |
3988 | may_write_memory_1 = may_write_memory; | |
3989 | may_insert_breakpoints_1 = may_insert_breakpoints; | |
3990 | may_insert_tracepoints_1 = may_insert_tracepoints; | |
3991 | may_insert_fast_tracepoints_1 = may_insert_fast_tracepoints; | |
3992 | may_stop_1 = may_stop; | |
3993 | } | |
3994 | ||
3995 | /* The one function handles (most of) the permission flags in the same | |
3996 | way. */ | |
3997 | ||
3998 | static void | |
eb4c3f4a | 3999 | set_target_permissions (const char *args, int from_tty, |
d914c394 SS |
4000 | struct cmd_list_element *c) |
4001 | { | |
4002 | if (target_has_execution) | |
4003 | { | |
4004 | update_target_permissions (); | |
4005 | error (_("Cannot change this setting while the inferior is running.")); | |
4006 | } | |
4007 | ||
4008 | /* Make the real values match the user-changed values. */ | |
4009 | may_write_registers = may_write_registers_1; | |
4010 | may_insert_breakpoints = may_insert_breakpoints_1; | |
4011 | may_insert_tracepoints = may_insert_tracepoints_1; | |
4012 | may_insert_fast_tracepoints = may_insert_fast_tracepoints_1; | |
4013 | may_stop = may_stop_1; | |
4014 | update_observer_mode (); | |
4015 | } | |
4016 | ||
4017 | /* Set memory write permission independently of observer mode. */ | |
4018 | ||
4019 | static void | |
eb4c3f4a | 4020 | set_write_memory_permission (const char *args, int from_tty, |
d914c394 SS |
4021 | struct cmd_list_element *c) |
4022 | { | |
4023 | /* Make the real values match the user-changed values. */ | |
4024 | may_write_memory = may_write_memory_1; | |
4025 | update_observer_mode (); | |
4026 | } | |
4027 | ||
1b30aaa5 YQ |
4028 | #if GDB_SELF_TEST |
4029 | namespace selftests { | |
4030 | ||
4031 | static int | |
4032 | test_target_has_registers (target_ops *self) | |
4033 | { | |
4034 | return 1; | |
4035 | } | |
4036 | ||
4037 | static int | |
4038 | test_target_has_stack (target_ops *self) | |
4039 | { | |
4040 | return 1; | |
4041 | } | |
4042 | ||
4043 | static int | |
4044 | test_target_has_memory (target_ops *self) | |
4045 | { | |
4046 | return 1; | |
4047 | } | |
4048 | ||
4049 | static void | |
4050 | test_target_prepare_to_store (target_ops *self, regcache *regs) | |
4051 | { | |
4052 | } | |
4053 | ||
4054 | static void | |
4055 | test_target_store_registers (target_ops *self, regcache *regs, int regno) | |
4056 | { | |
4057 | } | |
4058 | ||
4059 | test_target_ops::test_target_ops () | |
4060 | : target_ops {} | |
4061 | { | |
4062 | to_magic = OPS_MAGIC; | |
4063 | to_stratum = process_stratum; | |
4064 | to_has_memory = test_target_has_memory; | |
4065 | to_has_stack = test_target_has_stack; | |
4066 | to_has_registers = test_target_has_registers; | |
4067 | to_prepare_to_store = test_target_prepare_to_store; | |
4068 | to_store_registers = test_target_store_registers; | |
4069 | ||
4070 | complete_target_initialization (this); | |
4071 | } | |
4072 | ||
4073 | } // namespace selftests | |
4074 | #endif /* GDB_SELF_TEST */ | |
d914c394 | 4075 | |
c906108c | 4076 | void |
fba45db2 | 4077 | initialize_targets (void) |
c906108c SS |
4078 | { |
4079 | init_dummy_target (); | |
4080 | push_target (&dummy_target); | |
4081 | ||
11db9430 SM |
4082 | add_info ("target", info_target_command, targ_desc); |
4083 | add_info ("files", info_target_command, targ_desc); | |
c906108c | 4084 | |
ccce17b0 | 4085 | add_setshow_zuinteger_cmd ("target", class_maintenance, &targetdebug, _("\ |
85c07804 AC |
4086 | Set target debugging."), _("\ |
4087 | Show target debugging."), _("\ | |
333dabeb | 4088 | When non-zero, target debugging is enabled. Higher numbers are more\n\ |
3cecbbbe TT |
4089 | verbose."), |
4090 | set_targetdebug, | |
ccce17b0 YQ |
4091 | show_targetdebug, |
4092 | &setdebuglist, &showdebuglist); | |
3a11626d | 4093 | |
2bc416ba | 4094 | add_setshow_boolean_cmd ("trust-readonly-sections", class_support, |
7915a72c AC |
4095 | &trust_readonly, _("\ |
4096 | Set mode for reading from readonly sections."), _("\ | |
4097 | Show mode for reading from readonly sections."), _("\ | |
3a11626d MS |
4098 | When this mode is on, memory reads from readonly sections (such as .text)\n\ |
4099 | will be read from the object file instead of from the target. This will\n\ | |
7915a72c | 4100 | result in significant performance improvement for remote targets."), |
2c5b56ce | 4101 | NULL, |
920d2a44 | 4102 | show_trust_readonly, |
e707bbc2 | 4103 | &setlist, &showlist); |
96baa820 JM |
4104 | |
4105 | add_com ("monitor", class_obscure, do_monitor_command, | |
1bedd215 | 4106 | _("Send a command to the remote monitor (remote targets only).")); |
96baa820 | 4107 | |
87680a14 JB |
4108 | add_cmd ("target-stack", class_maintenance, maintenance_print_target_stack, |
4109 | _("Print the name of each layer of the internal target stack."), | |
4110 | &maintenanceprintlist); | |
4111 | ||
c6ebd6cf VP |
4112 | add_setshow_boolean_cmd ("target-async", no_class, |
4113 | &target_async_permitted_1, _("\ | |
4114 | Set whether gdb controls the inferior in asynchronous mode."), _("\ | |
4115 | Show whether gdb controls the inferior in asynchronous mode."), _("\ | |
4116 | Tells gdb whether to control the inferior in asynchronous mode."), | |
329ea579 PA |
4117 | maint_set_target_async_command, |
4118 | maint_show_target_async_command, | |
4119 | &maintenance_set_cmdlist, | |
4120 | &maintenance_show_cmdlist); | |
c6ebd6cf | 4121 | |
fbea99ea PA |
4122 | add_setshow_auto_boolean_cmd ("target-non-stop", no_class, |
4123 | &target_non_stop_enabled_1, _("\ | |
4124 | Set whether gdb always controls the inferior in non-stop mode."), _("\ | |
4125 | Show whether gdb always controls the inferior in non-stop mode."), _("\ | |
4126 | Tells gdb whether to control the inferior in non-stop mode."), | |
4127 | maint_set_target_non_stop_command, | |
4128 | maint_show_target_non_stop_command, | |
4129 | &maintenance_set_cmdlist, | |
4130 | &maintenance_show_cmdlist); | |
4131 | ||
d914c394 SS |
4132 | add_setshow_boolean_cmd ("may-write-registers", class_support, |
4133 | &may_write_registers_1, _("\ | |
4134 | Set permission to write into registers."), _("\ | |
4135 | Show permission to write into registers."), _("\ | |
4136 | When this permission is on, GDB may write into the target's registers.\n\ | |
4137 | Otherwise, any sort of write attempt will result in an error."), | |
4138 | set_target_permissions, NULL, | |
4139 | &setlist, &showlist); | |
4140 | ||
4141 | add_setshow_boolean_cmd ("may-write-memory", class_support, | |
4142 | &may_write_memory_1, _("\ | |
4143 | Set permission to write into target memory."), _("\ | |
4144 | Show permission to write into target memory."), _("\ | |
4145 | When this permission is on, GDB may write into the target's memory.\n\ | |
4146 | Otherwise, any sort of write attempt will result in an error."), | |
4147 | set_write_memory_permission, NULL, | |
4148 | &setlist, &showlist); | |
4149 | ||
4150 | add_setshow_boolean_cmd ("may-insert-breakpoints", class_support, | |
4151 | &may_insert_breakpoints_1, _("\ | |
4152 | Set permission to insert breakpoints in the target."), _("\ | |
4153 | Show permission to insert breakpoints in the target."), _("\ | |
4154 | When this permission is on, GDB may insert breakpoints in the program.\n\ | |
4155 | Otherwise, any sort of insertion attempt will result in an error."), | |
4156 | set_target_permissions, NULL, | |
4157 | &setlist, &showlist); | |
4158 | ||
4159 | add_setshow_boolean_cmd ("may-insert-tracepoints", class_support, | |
4160 | &may_insert_tracepoints_1, _("\ | |
4161 | Set permission to insert tracepoints in the target."), _("\ | |
4162 | Show permission to insert tracepoints in the target."), _("\ | |
4163 | When this permission is on, GDB may insert tracepoints in the program.\n\ | |
4164 | Otherwise, any sort of insertion attempt will result in an error."), | |
4165 | set_target_permissions, NULL, | |
4166 | &setlist, &showlist); | |
4167 | ||
4168 | add_setshow_boolean_cmd ("may-insert-fast-tracepoints", class_support, | |
4169 | &may_insert_fast_tracepoints_1, _("\ | |
4170 | Set permission to insert fast tracepoints in the target."), _("\ | |
4171 | Show permission to insert fast tracepoints in the target."), _("\ | |
4172 | When this permission is on, GDB may insert fast tracepoints.\n\ | |
4173 | Otherwise, any sort of insertion attempt will result in an error."), | |
4174 | set_target_permissions, NULL, | |
4175 | &setlist, &showlist); | |
4176 | ||
4177 | add_setshow_boolean_cmd ("may-interrupt", class_support, | |
4178 | &may_stop_1, _("\ | |
4179 | Set permission to interrupt or signal the target."), _("\ | |
4180 | Show permission to interrupt or signal the target."), _("\ | |
4181 | When this permission is on, GDB may interrupt/stop the target's execution.\n\ | |
4182 | Otherwise, any attempt to interrupt or stop will be ignored."), | |
4183 | set_target_permissions, NULL, | |
4184 | &setlist, &showlist); | |
6a3cb8e8 | 4185 | |
78cbbba8 LM |
4186 | add_com ("flash-erase", no_class, flash_erase_command, |
4187 | _("Erase all flash memory regions.")); | |
4188 | ||
6a3cb8e8 PA |
4189 | add_setshow_boolean_cmd ("auto-connect-native-target", class_support, |
4190 | &auto_connect_native_target, _("\ | |
4191 | Set whether GDB may automatically connect to the native target."), _("\ | |
4192 | Show whether GDB may automatically connect to the native target."), _("\ | |
4193 | When on, and GDB is not connected to a target yet, GDB\n\ | |
4194 | attempts \"run\" and other commands with the native target."), | |
4195 | NULL, show_auto_connect_native_target, | |
4196 | &setlist, &showlist); | |
c906108c | 4197 | } |