Commit | Line | Data |
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c906108c | 1 | /* Select target systems and architectures at runtime for GDB. |
7998dfc3 | 2 | |
61baf725 | 3 | Copyright (C) 1990-2017 Free Software Foundation, Inc. |
7998dfc3 | 4 | |
c906108c SS |
5 | Contributed by Cygnus Support. |
6 | ||
c5aa993b | 7 | This file is part of GDB. |
c906108c | 8 | |
c5aa993b JM |
9 | This program is free software; you can redistribute it and/or modify |
10 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 11 | the Free Software Foundation; either version 3 of the License, or |
c5aa993b | 12 | (at your option) any later version. |
c906108c | 13 | |
c5aa993b JM |
14 | This program is distributed in the hope that it will be useful, |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
c906108c | 18 | |
c5aa993b | 19 | You should have received a copy of the GNU General Public License |
a9762ec7 | 20 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c SS |
21 | |
22 | #include "defs.h" | |
c906108c | 23 | #include "target.h" |
68c765e2 | 24 | #include "target-dcache.h" |
c906108c SS |
25 | #include "gdbcmd.h" |
26 | #include "symtab.h" | |
27 | #include "inferior.h" | |
45741a9c | 28 | #include "infrun.h" |
c906108c SS |
29 | #include "bfd.h" |
30 | #include "symfile.h" | |
31 | #include "objfiles.h" | |
4930751a | 32 | #include "dcache.h" |
c906108c | 33 | #include <signal.h> |
4e052eda | 34 | #include "regcache.h" |
b6591e8b | 35 | #include "gdbcore.h" |
424163ea | 36 | #include "target-descriptions.h" |
e1ac3328 | 37 | #include "gdbthread.h" |
b9db4ced | 38 | #include "solib.h" |
07b82ea5 | 39 | #include "exec.h" |
edb3359d | 40 | #include "inline-frame.h" |
2f4d8875 | 41 | #include "tracepoint.h" |
7313baad | 42 | #include "gdb/fileio.h" |
8ffcbaaf | 43 | #include "agent.h" |
8de71aab | 44 | #include "auxv.h" |
a7068b60 | 45 | #include "target-debug.h" |
41fd2b0f PA |
46 | #include "top.h" |
47 | #include "event-top.h" | |
325fac50 | 48 | #include <algorithm> |
26fcd5d7 | 49 | #include "byte-vector.h" |
c906108c | 50 | |
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 PA |
1216 | |
1217 | /* Fill in READBUF with breakpoint shadows, or WRITEBUF with | |
1218 | breakpoint insns, thus hiding out from higher layers whether | |
1219 | there are software breakpoints inserted in the code stream. */ | |
1220 | if (readbuf != NULL) | |
1221 | { | |
9b409511 YQ |
1222 | res = memory_xfer_partial_1 (ops, object, readbuf, NULL, memaddr, len, |
1223 | xfered_len); | |
f0ba3972 | 1224 | |
9b409511 | 1225 | if (res == TARGET_XFER_OK && !show_memory_breakpoints) |
c63528fc | 1226 | breakpoint_xfer_memory (readbuf, NULL, NULL, memaddr, *xfered_len); |
f0ba3972 PA |
1227 | } |
1228 | else | |
1229 | { | |
67c059c2 AB |
1230 | /* A large write request is likely to be partially satisfied |
1231 | by memory_xfer_partial_1. We will continually malloc | |
1232 | and free a copy of the entire write request for breakpoint | |
1233 | shadow handling even though we only end up writing a small | |
09c98b44 DB |
1234 | subset of it. Cap writes to a limit specified by the target |
1235 | to mitigate this. */ | |
325fac50 | 1236 | len = std::min (ops->to_get_memory_xfer_limit (ops), len); |
67c059c2 | 1237 | |
26fcd5d7 TT |
1238 | gdb::byte_vector buf (writebuf, writebuf + len); |
1239 | breakpoint_xfer_memory (NULL, buf.data (), writebuf, memaddr, len); | |
1240 | res = memory_xfer_partial_1 (ops, object, NULL, buf.data (), memaddr, len, | |
9b409511 | 1241 | xfered_len); |
f0ba3972 PA |
1242 | } |
1243 | ||
1244 | return res; | |
1245 | } | |
1246 | ||
cb85b21b TT |
1247 | scoped_restore_tmpl<int> |
1248 | make_scoped_restore_show_memory_breakpoints (int show) | |
8defab1a | 1249 | { |
cb85b21b | 1250 | return make_scoped_restore (&show_memory_breakpoints, show); |
8defab1a DJ |
1251 | } |
1252 | ||
7f79c47e DE |
1253 | /* For docs see target.h, to_xfer_partial. */ |
1254 | ||
9b409511 | 1255 | enum target_xfer_status |
27394598 AC |
1256 | target_xfer_partial (struct target_ops *ops, |
1257 | enum target_object object, const char *annex, | |
4ac248ca | 1258 | gdb_byte *readbuf, const gdb_byte *writebuf, |
9b409511 YQ |
1259 | ULONGEST offset, ULONGEST len, |
1260 | ULONGEST *xfered_len) | |
27394598 | 1261 | { |
9b409511 | 1262 | enum target_xfer_status retval; |
27394598 AC |
1263 | |
1264 | gdb_assert (ops->to_xfer_partial != NULL); | |
cf7a04e8 | 1265 | |
ce6d0892 YQ |
1266 | /* Transfer is done when LEN is zero. */ |
1267 | if (len == 0) | |
9b409511 | 1268 | return TARGET_XFER_EOF; |
ce6d0892 | 1269 | |
d914c394 SS |
1270 | if (writebuf && !may_write_memory) |
1271 | error (_("Writing to memory is not allowed (addr %s, len %s)"), | |
1272 | core_addr_to_string_nz (offset), plongest (len)); | |
1273 | ||
9b409511 YQ |
1274 | *xfered_len = 0; |
1275 | ||
cf7a04e8 DJ |
1276 | /* If this is a memory transfer, let the memory-specific code |
1277 | have a look at it instead. Memory transfers are more | |
1278 | complicated. */ | |
29453a14 YQ |
1279 | if (object == TARGET_OBJECT_MEMORY || object == TARGET_OBJECT_STACK_MEMORY |
1280 | || object == TARGET_OBJECT_CODE_MEMORY) | |
4e5d721f | 1281 | retval = memory_xfer_partial (ops, object, readbuf, |
9b409511 | 1282 | writebuf, offset, len, xfered_len); |
9f713294 | 1283 | else if (object == TARGET_OBJECT_RAW_MEMORY) |
cf7a04e8 | 1284 | { |
0fec99e8 PA |
1285 | /* Skip/avoid accessing the target if the memory region |
1286 | attributes block the access. Check this here instead of in | |
1287 | raw_memory_xfer_partial as otherwise we'd end up checking | |
1288 | this twice in the case of the memory_xfer_partial path is | |
1289 | taken; once before checking the dcache, and another in the | |
1290 | tail call to raw_memory_xfer_partial. */ | |
1291 | if (!memory_xfer_check_region (readbuf, writebuf, offset, len, &len, | |
1292 | NULL)) | |
1293 | return TARGET_XFER_E_IO; | |
1294 | ||
9f713294 | 1295 | /* Request the normal memory object from other layers. */ |
9b409511 YQ |
1296 | retval = raw_memory_xfer_partial (ops, readbuf, writebuf, offset, len, |
1297 | xfered_len); | |
cf7a04e8 | 1298 | } |
9f713294 YQ |
1299 | else |
1300 | retval = ops->to_xfer_partial (ops, object, annex, readbuf, | |
9b409511 | 1301 | writebuf, offset, len, xfered_len); |
cf7a04e8 | 1302 | |
27394598 AC |
1303 | if (targetdebug) |
1304 | { | |
1305 | const unsigned char *myaddr = NULL; | |
1306 | ||
1307 | fprintf_unfiltered (gdb_stdlog, | |
3e43a32a | 1308 | "%s:target_xfer_partial " |
9b409511 | 1309 | "(%d, %s, %s, %s, %s, %s) = %d, %s", |
27394598 AC |
1310 | ops->to_shortname, |
1311 | (int) object, | |
1312 | (annex ? annex : "(null)"), | |
53b71562 JB |
1313 | host_address_to_string (readbuf), |
1314 | host_address_to_string (writebuf), | |
0b1553bc | 1315 | core_addr_to_string_nz (offset), |
9b409511 YQ |
1316 | pulongest (len), retval, |
1317 | pulongest (*xfered_len)); | |
27394598 AC |
1318 | |
1319 | if (readbuf) | |
1320 | myaddr = readbuf; | |
1321 | if (writebuf) | |
1322 | myaddr = writebuf; | |
9b409511 | 1323 | if (retval == TARGET_XFER_OK && myaddr != NULL) |
27394598 AC |
1324 | { |
1325 | int i; | |
2bc416ba | 1326 | |
27394598 | 1327 | fputs_unfiltered (", bytes =", gdb_stdlog); |
9b409511 | 1328 | for (i = 0; i < *xfered_len; i++) |
27394598 | 1329 | { |
53b71562 | 1330 | if ((((intptr_t) &(myaddr[i])) & 0xf) == 0) |
27394598 AC |
1331 | { |
1332 | if (targetdebug < 2 && i > 0) | |
1333 | { | |
1334 | fprintf_unfiltered (gdb_stdlog, " ..."); | |
1335 | break; | |
1336 | } | |
1337 | fprintf_unfiltered (gdb_stdlog, "\n"); | |
1338 | } | |
2bc416ba | 1339 | |
27394598 AC |
1340 | fprintf_unfiltered (gdb_stdlog, " %02x", myaddr[i] & 0xff); |
1341 | } | |
1342 | } | |
2bc416ba | 1343 | |
27394598 AC |
1344 | fputc_unfiltered ('\n', gdb_stdlog); |
1345 | } | |
9b409511 YQ |
1346 | |
1347 | /* Check implementations of to_xfer_partial update *XFERED_LEN | |
1348 | properly. Do assertion after printing debug messages, so that we | |
1349 | can find more clues on assertion failure from debugging messages. */ | |
bc113b4e | 1350 | if (retval == TARGET_XFER_OK || retval == TARGET_XFER_UNAVAILABLE) |
9b409511 YQ |
1351 | gdb_assert (*xfered_len > 0); |
1352 | ||
27394598 AC |
1353 | return retval; |
1354 | } | |
1355 | ||
578d3588 PA |
1356 | /* Read LEN bytes of target memory at address MEMADDR, placing the |
1357 | results in GDB's memory at MYADDR. Returns either 0 for success or | |
d09f2c3f | 1358 | -1 if any error occurs. |
c906108c SS |
1359 | |
1360 | If an error occurs, no guarantee is made about the contents of the data at | |
1361 | MYADDR. In particular, the caller should not depend upon partial reads | |
1362 | filling the buffer with good data. There is no way for the caller to know | |
1363 | how much good data might have been transfered anyway. Callers that can | |
cf7a04e8 | 1364 | deal with partial reads should call target_read (which will retry until |
c378eb4e | 1365 | it makes no progress, and then return how much was transferred). */ |
c906108c SS |
1366 | |
1367 | int | |
1b162304 | 1368 | target_read_memory (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len) |
c906108c | 1369 | { |
c35b1492 PA |
1370 | /* Dispatch to the topmost target, not the flattened current_target. |
1371 | Memory accesses check target->to_has_(all_)memory, and the | |
1372 | flattened target doesn't inherit those. */ | |
1373 | if (target_read (current_target.beneath, TARGET_OBJECT_MEMORY, NULL, | |
cf7a04e8 DJ |
1374 | myaddr, memaddr, len) == len) |
1375 | return 0; | |
0779438d | 1376 | else |
d09f2c3f | 1377 | return -1; |
c906108c SS |
1378 | } |
1379 | ||
721ec300 GB |
1380 | /* See target/target.h. */ |
1381 | ||
1382 | int | |
1383 | target_read_uint32 (CORE_ADDR memaddr, uint32_t *result) | |
1384 | { | |
1385 | gdb_byte buf[4]; | |
1386 | int r; | |
1387 | ||
1388 | r = target_read_memory (memaddr, buf, sizeof buf); | |
1389 | if (r != 0) | |
1390 | return r; | |
1391 | *result = extract_unsigned_integer (buf, sizeof buf, | |
1392 | gdbarch_byte_order (target_gdbarch ())); | |
1393 | return 0; | |
1394 | } | |
1395 | ||
aee4bf85 PA |
1396 | /* Like target_read_memory, but specify explicitly that this is a read |
1397 | from the target's raw memory. That is, this read bypasses the | |
1398 | dcache, breakpoint shadowing, etc. */ | |
1399 | ||
1400 | int | |
1401 | target_read_raw_memory (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len) | |
1402 | { | |
1403 | /* See comment in target_read_memory about why the request starts at | |
1404 | current_target.beneath. */ | |
1405 | if (target_read (current_target.beneath, TARGET_OBJECT_RAW_MEMORY, NULL, | |
1406 | myaddr, memaddr, len) == len) | |
1407 | return 0; | |
1408 | else | |
d09f2c3f | 1409 | return -1; |
aee4bf85 PA |
1410 | } |
1411 | ||
4e5d721f DE |
1412 | /* Like target_read_memory, but specify explicitly that this is a read from |
1413 | the target's stack. This may trigger different cache behavior. */ | |
1414 | ||
1415 | int | |
45aa4659 | 1416 | target_read_stack (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len) |
4e5d721f | 1417 | { |
aee4bf85 PA |
1418 | /* See comment in target_read_memory about why the request starts at |
1419 | current_target.beneath. */ | |
4e5d721f DE |
1420 | if (target_read (current_target.beneath, TARGET_OBJECT_STACK_MEMORY, NULL, |
1421 | myaddr, memaddr, len) == len) | |
1422 | return 0; | |
1423 | else | |
d09f2c3f | 1424 | return -1; |
4e5d721f DE |
1425 | } |
1426 | ||
29453a14 YQ |
1427 | /* Like target_read_memory, but specify explicitly that this is a read from |
1428 | the target's code. This may trigger different cache behavior. */ | |
1429 | ||
1430 | int | |
1431 | target_read_code (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len) | |
1432 | { | |
aee4bf85 PA |
1433 | /* See comment in target_read_memory about why the request starts at |
1434 | current_target.beneath. */ | |
29453a14 YQ |
1435 | if (target_read (current_target.beneath, TARGET_OBJECT_CODE_MEMORY, NULL, |
1436 | myaddr, memaddr, len) == len) | |
1437 | return 0; | |
1438 | else | |
d09f2c3f | 1439 | return -1; |
29453a14 YQ |
1440 | } |
1441 | ||
7f79c47e | 1442 | /* Write LEN bytes from MYADDR to target memory at address MEMADDR. |
d09f2c3f PA |
1443 | Returns either 0 for success or -1 if any error occurs. If an |
1444 | error occurs, no guarantee is made about how much data got written. | |
1445 | Callers that can deal with partial writes should call | |
1446 | target_write. */ | |
7f79c47e | 1447 | |
c906108c | 1448 | int |
45aa4659 | 1449 | target_write_memory (CORE_ADDR memaddr, const gdb_byte *myaddr, ssize_t len) |
c906108c | 1450 | { |
aee4bf85 PA |
1451 | /* See comment in target_read_memory about why the request starts at |
1452 | current_target.beneath. */ | |
c35b1492 | 1453 | if (target_write (current_target.beneath, TARGET_OBJECT_MEMORY, NULL, |
cf7a04e8 DJ |
1454 | myaddr, memaddr, len) == len) |
1455 | return 0; | |
0779438d | 1456 | else |
d09f2c3f | 1457 | return -1; |
c906108c | 1458 | } |
c5aa993b | 1459 | |
f0ba3972 | 1460 | /* Write LEN bytes from MYADDR to target raw memory at address |
d09f2c3f PA |
1461 | MEMADDR. Returns either 0 for success or -1 if any error occurs. |
1462 | If an error occurs, no guarantee is made about how much data got | |
1463 | written. Callers that can deal with partial writes should call | |
1464 | target_write. */ | |
f0ba3972 PA |
1465 | |
1466 | int | |
45aa4659 | 1467 | target_write_raw_memory (CORE_ADDR memaddr, const gdb_byte *myaddr, ssize_t len) |
f0ba3972 | 1468 | { |
aee4bf85 PA |
1469 | /* See comment in target_read_memory about why the request starts at |
1470 | current_target.beneath. */ | |
f0ba3972 PA |
1471 | if (target_write (current_target.beneath, TARGET_OBJECT_RAW_MEMORY, NULL, |
1472 | myaddr, memaddr, len) == len) | |
1473 | return 0; | |
1474 | else | |
d09f2c3f | 1475 | return -1; |
f0ba3972 PA |
1476 | } |
1477 | ||
fd79ecee DJ |
1478 | /* Fetch the target's memory map. */ |
1479 | ||
a664f67e | 1480 | std::vector<mem_region> |
fd79ecee DJ |
1481 | target_memory_map (void) |
1482 | { | |
a664f67e SM |
1483 | std::vector<mem_region> result |
1484 | = current_target.to_memory_map (¤t_target); | |
1485 | if (result.empty ()) | |
1486 | return result; | |
fd79ecee | 1487 | |
a664f67e | 1488 | std::sort (result.begin (), result.end ()); |
fd79ecee DJ |
1489 | |
1490 | /* Check that regions do not overlap. Simultaneously assign | |
1491 | a numbering for the "mem" commands to use to refer to | |
1492 | each region. */ | |
a664f67e SM |
1493 | mem_region *last_one = NULL; |
1494 | for (size_t ix = 0; ix < result.size (); ix++) | |
fd79ecee | 1495 | { |
a664f67e | 1496 | mem_region *this_one = &result[ix]; |
fd79ecee DJ |
1497 | this_one->number = ix; |
1498 | ||
a664f67e | 1499 | if (last_one != NULL && last_one->hi > this_one->lo) |
fd79ecee DJ |
1500 | { |
1501 | warning (_("Overlapping regions in memory map: ignoring")); | |
a664f67e | 1502 | return std::vector<mem_region> (); |
fd79ecee | 1503 | } |
a664f67e | 1504 | |
fd79ecee DJ |
1505 | last_one = this_one; |
1506 | } | |
1507 | ||
1508 | return result; | |
1509 | } | |
1510 | ||
a76d924d DJ |
1511 | void |
1512 | target_flash_erase (ULONGEST address, LONGEST length) | |
1513 | { | |
e8a6c6ac | 1514 | current_target.to_flash_erase (¤t_target, address, length); |
a76d924d DJ |
1515 | } |
1516 | ||
1517 | void | |
1518 | target_flash_done (void) | |
1519 | { | |
f6fb2925 | 1520 | current_target.to_flash_done (¤t_target); |
a76d924d DJ |
1521 | } |
1522 | ||
920d2a44 AC |
1523 | static void |
1524 | show_trust_readonly (struct ui_file *file, int from_tty, | |
1525 | struct cmd_list_element *c, const char *value) | |
1526 | { | |
3e43a32a MS |
1527 | fprintf_filtered (file, |
1528 | _("Mode for reading from readonly sections is %s.\n"), | |
920d2a44 AC |
1529 | value); |
1530 | } | |
3a11626d | 1531 | |
7f79c47e | 1532 | /* Target vector read/write partial wrapper functions. */ |
0088c768 | 1533 | |
9b409511 | 1534 | static enum target_xfer_status |
1e3ff5ad AC |
1535 | target_read_partial (struct target_ops *ops, |
1536 | enum target_object object, | |
1b0ba102 | 1537 | const char *annex, gdb_byte *buf, |
9b409511 YQ |
1538 | ULONGEST offset, ULONGEST len, |
1539 | ULONGEST *xfered_len) | |
1e3ff5ad | 1540 | { |
9b409511 YQ |
1541 | return target_xfer_partial (ops, object, annex, buf, NULL, offset, len, |
1542 | xfered_len); | |
1e3ff5ad AC |
1543 | } |
1544 | ||
8a55ffb0 | 1545 | static enum target_xfer_status |
1e3ff5ad AC |
1546 | target_write_partial (struct target_ops *ops, |
1547 | enum target_object object, | |
1b0ba102 | 1548 | const char *annex, const gdb_byte *buf, |
9b409511 | 1549 | ULONGEST offset, LONGEST len, ULONGEST *xfered_len) |
1e3ff5ad | 1550 | { |
9b409511 YQ |
1551 | return target_xfer_partial (ops, object, annex, NULL, buf, offset, len, |
1552 | xfered_len); | |
1e3ff5ad AC |
1553 | } |
1554 | ||
1555 | /* Wrappers to perform the full transfer. */ | |
7f79c47e DE |
1556 | |
1557 | /* For docs on target_read see target.h. */ | |
1558 | ||
1e3ff5ad AC |
1559 | LONGEST |
1560 | target_read (struct target_ops *ops, | |
1561 | enum target_object object, | |
1b0ba102 | 1562 | const char *annex, gdb_byte *buf, |
1e3ff5ad AC |
1563 | ULONGEST offset, LONGEST len) |
1564 | { | |
279a6fed | 1565 | LONGEST xfered_total = 0; |
d309493c SM |
1566 | int unit_size = 1; |
1567 | ||
1568 | /* If we are reading from a memory object, find the length of an addressable | |
1569 | unit for that architecture. */ | |
1570 | if (object == TARGET_OBJECT_MEMORY | |
1571 | || object == TARGET_OBJECT_STACK_MEMORY | |
1572 | || object == TARGET_OBJECT_CODE_MEMORY | |
1573 | || object == TARGET_OBJECT_RAW_MEMORY) | |
1574 | unit_size = gdbarch_addressable_memory_unit_size (target_gdbarch ()); | |
5d502164 | 1575 | |
279a6fed | 1576 | while (xfered_total < len) |
1e3ff5ad | 1577 | { |
279a6fed | 1578 | ULONGEST xfered_partial; |
9b409511 YQ |
1579 | enum target_xfer_status status; |
1580 | ||
1581 | status = target_read_partial (ops, object, annex, | |
d309493c | 1582 | buf + xfered_total * unit_size, |
279a6fed SM |
1583 | offset + xfered_total, len - xfered_total, |
1584 | &xfered_partial); | |
5d502164 | 1585 | |
1e3ff5ad | 1586 | /* Call an observer, notifying them of the xfer progress? */ |
9b409511 | 1587 | if (status == TARGET_XFER_EOF) |
279a6fed | 1588 | return xfered_total; |
9b409511 YQ |
1589 | else if (status == TARGET_XFER_OK) |
1590 | { | |
279a6fed | 1591 | xfered_total += xfered_partial; |
9b409511 YQ |
1592 | QUIT; |
1593 | } | |
1594 | else | |
279a6fed | 1595 | return TARGET_XFER_E_IO; |
9b409511 | 1596 | |
1e3ff5ad AC |
1597 | } |
1598 | return len; | |
1599 | } | |
1600 | ||
f1a507a1 JB |
1601 | /* Assuming that the entire [begin, end) range of memory cannot be |
1602 | read, try to read whatever subrange is possible to read. | |
1603 | ||
1604 | The function returns, in RESULT, either zero or one memory block. | |
1605 | If there's a readable subrange at the beginning, it is completely | |
1606 | read and returned. Any further readable subrange will not be read. | |
1607 | Otherwise, if there's a readable subrange at the end, it will be | |
1608 | completely read and returned. Any readable subranges before it | |
1609 | (obviously, not starting at the beginning), will be ignored. In | |
1610 | other cases -- either no readable subrange, or readable subrange(s) | |
1611 | that is neither at the beginning, or end, nothing is returned. | |
1612 | ||
1613 | The purpose of this function is to handle a read across a boundary | |
1614 | of accessible memory in a case when memory map is not available. | |
1615 | The above restrictions are fine for this case, but will give | |
1616 | incorrect results if the memory is 'patchy'. However, supporting | |
1617 | 'patchy' memory would require trying to read every single byte, | |
1618 | and it seems unacceptable solution. Explicit memory map is | |
1619 | recommended for this case -- and target_read_memory_robust will | |
1620 | take care of reading multiple ranges then. */ | |
8dedea02 VP |
1621 | |
1622 | static void | |
3e43a32a | 1623 | read_whatever_is_readable (struct target_ops *ops, |
279a6fed | 1624 | const ULONGEST begin, const ULONGEST end, |
d309493c | 1625 | int unit_size, |
386c8614 | 1626 | std::vector<memory_read_result> *result) |
d5086790 | 1627 | { |
8dedea02 VP |
1628 | ULONGEST current_begin = begin; |
1629 | ULONGEST current_end = end; | |
1630 | int forward; | |
9b409511 | 1631 | ULONGEST xfered_len; |
8dedea02 VP |
1632 | |
1633 | /* If we previously failed to read 1 byte, nothing can be done here. */ | |
1634 | if (end - begin <= 1) | |
386c8614 TT |
1635 | return; |
1636 | ||
1637 | gdb::unique_xmalloc_ptr<gdb_byte> buf ((gdb_byte *) xmalloc (end - begin)); | |
8dedea02 VP |
1638 | |
1639 | /* Check that either first or the last byte is readable, and give up | |
c378eb4e | 1640 | if not. This heuristic is meant to permit reading accessible memory |
8dedea02 VP |
1641 | at the boundary of accessible region. */ |
1642 | if (target_read_partial (ops, TARGET_OBJECT_MEMORY, NULL, | |
386c8614 | 1643 | buf.get (), begin, 1, &xfered_len) == TARGET_XFER_OK) |
8dedea02 VP |
1644 | { |
1645 | forward = 1; | |
1646 | ++current_begin; | |
1647 | } | |
1648 | else if (target_read_partial (ops, TARGET_OBJECT_MEMORY, NULL, | |
386c8614 | 1649 | buf.get () + (end - begin) - 1, end - 1, 1, |
9b409511 | 1650 | &xfered_len) == TARGET_XFER_OK) |
8dedea02 VP |
1651 | { |
1652 | forward = 0; | |
1653 | --current_end; | |
1654 | } | |
1655 | else | |
386c8614 | 1656 | return; |
8dedea02 VP |
1657 | |
1658 | /* Loop invariant is that the [current_begin, current_end) was previously | |
1659 | found to be not readable as a whole. | |
1660 | ||
1661 | Note loop condition -- if the range has 1 byte, we can't divide the range | |
1662 | so there's no point trying further. */ | |
1663 | while (current_end - current_begin > 1) | |
1664 | { | |
1665 | ULONGEST first_half_begin, first_half_end; | |
1666 | ULONGEST second_half_begin, second_half_end; | |
1667 | LONGEST xfer; | |
279a6fed | 1668 | ULONGEST middle = current_begin + (current_end - current_begin) / 2; |
f1a507a1 | 1669 | |
8dedea02 VP |
1670 | if (forward) |
1671 | { | |
1672 | first_half_begin = current_begin; | |
1673 | first_half_end = middle; | |
1674 | second_half_begin = middle; | |
1675 | second_half_end = current_end; | |
1676 | } | |
1677 | else | |
1678 | { | |
1679 | first_half_begin = middle; | |
1680 | first_half_end = current_end; | |
1681 | second_half_begin = current_begin; | |
1682 | second_half_end = middle; | |
1683 | } | |
1684 | ||
1685 | xfer = target_read (ops, TARGET_OBJECT_MEMORY, NULL, | |
386c8614 | 1686 | buf.get () + (first_half_begin - begin) * unit_size, |
8dedea02 VP |
1687 | first_half_begin, |
1688 | first_half_end - first_half_begin); | |
1689 | ||
1690 | if (xfer == first_half_end - first_half_begin) | |
1691 | { | |
c378eb4e | 1692 | /* This half reads up fine. So, the error must be in the |
3e43a32a | 1693 | other half. */ |
8dedea02 VP |
1694 | current_begin = second_half_begin; |
1695 | current_end = second_half_end; | |
1696 | } | |
1697 | else | |
1698 | { | |
c378eb4e | 1699 | /* This half is not readable. Because we've tried one byte, we |
279a6fed | 1700 | know some part of this half if actually readable. Go to the next |
8dedea02 VP |
1701 | iteration to divide again and try to read. |
1702 | ||
1703 | We don't handle the other half, because this function only tries | |
1704 | to read a single readable subrange. */ | |
1705 | current_begin = first_half_begin; | |
1706 | current_end = first_half_end; | |
1707 | } | |
1708 | } | |
1709 | ||
1710 | if (forward) | |
1711 | { | |
1712 | /* The [begin, current_begin) range has been read. */ | |
386c8614 | 1713 | result->emplace_back (begin, current_end, std::move (buf)); |
8dedea02 VP |
1714 | } |
1715 | else | |
1716 | { | |
1717 | /* The [current_end, end) range has been read. */ | |
279a6fed | 1718 | LONGEST region_len = end - current_end; |
f1a507a1 | 1719 | |
386c8614 TT |
1720 | gdb::unique_xmalloc_ptr<gdb_byte> data |
1721 | ((gdb_byte *) xmalloc (region_len * unit_size)); | |
1722 | memcpy (data.get (), buf.get () + (current_end - begin) * unit_size, | |
d309493c | 1723 | region_len * unit_size); |
386c8614 | 1724 | result->emplace_back (current_end, end, std::move (data)); |
8dedea02 | 1725 | } |
8dedea02 VP |
1726 | } |
1727 | ||
386c8614 | 1728 | std::vector<memory_read_result> |
279a6fed SM |
1729 | read_memory_robust (struct target_ops *ops, |
1730 | const ULONGEST offset, const LONGEST len) | |
8dedea02 | 1731 | { |
386c8614 | 1732 | std::vector<memory_read_result> result; |
d309493c | 1733 | int unit_size = gdbarch_addressable_memory_unit_size (target_gdbarch ()); |
8dedea02 | 1734 | |
279a6fed SM |
1735 | LONGEST xfered_total = 0; |
1736 | while (xfered_total < len) | |
d5086790 | 1737 | { |
279a6fed SM |
1738 | struct mem_region *region = lookup_mem_region (offset + xfered_total); |
1739 | LONGEST region_len; | |
5d502164 | 1740 | |
8dedea02 VP |
1741 | /* If there is no explicit region, a fake one should be created. */ |
1742 | gdb_assert (region); | |
1743 | ||
1744 | if (region->hi == 0) | |
279a6fed | 1745 | region_len = len - xfered_total; |
8dedea02 | 1746 | else |
279a6fed | 1747 | region_len = region->hi - offset; |
8dedea02 VP |
1748 | |
1749 | if (region->attrib.mode == MEM_NONE || region->attrib.mode == MEM_WO) | |
d5086790 | 1750 | { |
c378eb4e | 1751 | /* Cannot read this region. Note that we can end up here only |
8dedea02 VP |
1752 | if the region is explicitly marked inaccessible, or |
1753 | 'inaccessible-by-default' is in effect. */ | |
279a6fed | 1754 | xfered_total += region_len; |
8dedea02 VP |
1755 | } |
1756 | else | |
1757 | { | |
325fac50 | 1758 | LONGEST to_read = std::min (len - xfered_total, region_len); |
386c8614 TT |
1759 | gdb::unique_xmalloc_ptr<gdb_byte> buffer |
1760 | ((gdb_byte *) xmalloc (to_read * unit_size)); | |
8dedea02 | 1761 | |
279a6fed | 1762 | LONGEST xfered_partial = |
386c8614 | 1763 | target_read (ops, TARGET_OBJECT_MEMORY, NULL, buffer.get (), |
279a6fed | 1764 | offset + xfered_total, to_read); |
8dedea02 | 1765 | /* Call an observer, notifying them of the xfer progress? */ |
279a6fed | 1766 | if (xfered_partial <= 0) |
d5086790 | 1767 | { |
c378eb4e | 1768 | /* Got an error reading full chunk. See if maybe we can read |
8dedea02 | 1769 | some subrange. */ |
e084c964 DB |
1770 | read_whatever_is_readable (ops, offset + xfered_total, |
1771 | offset + xfered_total + to_read, | |
1772 | unit_size, &result); | |
279a6fed | 1773 | xfered_total += to_read; |
d5086790 | 1774 | } |
8dedea02 VP |
1775 | else |
1776 | { | |
386c8614 TT |
1777 | result.emplace_back (offset + xfered_total, |
1778 | offset + xfered_total + xfered_partial, | |
1779 | std::move (buffer)); | |
279a6fed | 1780 | xfered_total += xfered_partial; |
8dedea02 VP |
1781 | } |
1782 | QUIT; | |
d5086790 | 1783 | } |
d5086790 | 1784 | } |
9d78f827 | 1785 | |
8dedea02 | 1786 | return result; |
d5086790 VP |
1787 | } |
1788 | ||
8dedea02 | 1789 | |
cf7a04e8 DJ |
1790 | /* An alternative to target_write with progress callbacks. */ |
1791 | ||
1e3ff5ad | 1792 | LONGEST |
cf7a04e8 DJ |
1793 | target_write_with_progress (struct target_ops *ops, |
1794 | enum target_object object, | |
1795 | const char *annex, const gdb_byte *buf, | |
1796 | ULONGEST offset, LONGEST len, | |
1797 | void (*progress) (ULONGEST, void *), void *baton) | |
1e3ff5ad | 1798 | { |
279a6fed | 1799 | LONGEST xfered_total = 0; |
d309493c SM |
1800 | int unit_size = 1; |
1801 | ||
1802 | /* If we are writing to a memory object, find the length of an addressable | |
1803 | unit for that architecture. */ | |
1804 | if (object == TARGET_OBJECT_MEMORY | |
1805 | || object == TARGET_OBJECT_STACK_MEMORY | |
1806 | || object == TARGET_OBJECT_CODE_MEMORY | |
1807 | || object == TARGET_OBJECT_RAW_MEMORY) | |
1808 | unit_size = gdbarch_addressable_memory_unit_size (target_gdbarch ()); | |
a76d924d DJ |
1809 | |
1810 | /* Give the progress callback a chance to set up. */ | |
1811 | if (progress) | |
1812 | (*progress) (0, baton); | |
1813 | ||
279a6fed | 1814 | while (xfered_total < len) |
1e3ff5ad | 1815 | { |
279a6fed | 1816 | ULONGEST xfered_partial; |
9b409511 YQ |
1817 | enum target_xfer_status status; |
1818 | ||
1819 | status = target_write_partial (ops, object, annex, | |
d309493c | 1820 | buf + xfered_total * unit_size, |
279a6fed SM |
1821 | offset + xfered_total, len - xfered_total, |
1822 | &xfered_partial); | |
cf7a04e8 | 1823 | |
5c328c05 | 1824 | if (status != TARGET_XFER_OK) |
279a6fed | 1825 | return status == TARGET_XFER_EOF ? xfered_total : TARGET_XFER_E_IO; |
cf7a04e8 DJ |
1826 | |
1827 | if (progress) | |
279a6fed | 1828 | (*progress) (xfered_partial, baton); |
cf7a04e8 | 1829 | |
279a6fed | 1830 | xfered_total += xfered_partial; |
1e3ff5ad AC |
1831 | QUIT; |
1832 | } | |
1833 | return len; | |
1834 | } | |
1835 | ||
7f79c47e DE |
1836 | /* For docs on target_write see target.h. */ |
1837 | ||
cf7a04e8 DJ |
1838 | LONGEST |
1839 | target_write (struct target_ops *ops, | |
1840 | enum target_object object, | |
1841 | const char *annex, const gdb_byte *buf, | |
1842 | ULONGEST offset, LONGEST len) | |
1843 | { | |
1844 | return target_write_with_progress (ops, object, annex, buf, offset, len, | |
1845 | NULL, NULL); | |
1846 | } | |
1847 | ||
159f81f3 DJ |
1848 | /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return |
1849 | the size of the transferred data. PADDING additional bytes are | |
1850 | available in *BUF_P. This is a helper function for | |
1851 | target_read_alloc; see the declaration of that function for more | |
1852 | information. */ | |
13547ab6 | 1853 | |
159f81f3 DJ |
1854 | static LONGEST |
1855 | target_read_alloc_1 (struct target_ops *ops, enum target_object object, | |
1856 | const char *annex, gdb_byte **buf_p, int padding) | |
13547ab6 DJ |
1857 | { |
1858 | size_t buf_alloc, buf_pos; | |
1859 | gdb_byte *buf; | |
13547ab6 DJ |
1860 | |
1861 | /* This function does not have a length parameter; it reads the | |
1862 | entire OBJECT). Also, it doesn't support objects fetched partly | |
1863 | from one target and partly from another (in a different stratum, | |
1864 | e.g. a core file and an executable). Both reasons make it | |
1865 | unsuitable for reading memory. */ | |
1866 | gdb_assert (object != TARGET_OBJECT_MEMORY); | |
1867 | ||
1868 | /* Start by reading up to 4K at a time. The target will throttle | |
1869 | this number down if necessary. */ | |
1870 | buf_alloc = 4096; | |
224c3ddb | 1871 | buf = (gdb_byte *) xmalloc (buf_alloc); |
13547ab6 DJ |
1872 | buf_pos = 0; |
1873 | while (1) | |
1874 | { | |
9b409511 YQ |
1875 | ULONGEST xfered_len; |
1876 | enum target_xfer_status status; | |
1877 | ||
1878 | status = target_read_partial (ops, object, annex, &buf[buf_pos], | |
1879 | buf_pos, buf_alloc - buf_pos - padding, | |
1880 | &xfered_len); | |
1881 | ||
1882 | if (status == TARGET_XFER_EOF) | |
13547ab6 DJ |
1883 | { |
1884 | /* Read all there was. */ | |
1885 | if (buf_pos == 0) | |
1886 | xfree (buf); | |
1887 | else | |
1888 | *buf_p = buf; | |
1889 | return buf_pos; | |
1890 | } | |
9b409511 YQ |
1891 | else if (status != TARGET_XFER_OK) |
1892 | { | |
1893 | /* An error occurred. */ | |
1894 | xfree (buf); | |
1895 | return TARGET_XFER_E_IO; | |
1896 | } | |
13547ab6 | 1897 | |
9b409511 | 1898 | buf_pos += xfered_len; |
13547ab6 DJ |
1899 | |
1900 | /* If the buffer is filling up, expand it. */ | |
1901 | if (buf_alloc < buf_pos * 2) | |
1902 | { | |
1903 | buf_alloc *= 2; | |
224c3ddb | 1904 | buf = (gdb_byte *) xrealloc (buf, buf_alloc); |
13547ab6 DJ |
1905 | } |
1906 | ||
1907 | QUIT; | |
1908 | } | |
1909 | } | |
1910 | ||
159f81f3 DJ |
1911 | /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return |
1912 | the size of the transferred data. See the declaration in "target.h" | |
1913 | function for more information about the return value. */ | |
1914 | ||
1915 | LONGEST | |
1916 | target_read_alloc (struct target_ops *ops, enum target_object object, | |
1917 | const char *annex, gdb_byte **buf_p) | |
1918 | { | |
1919 | return target_read_alloc_1 (ops, object, annex, buf_p, 0); | |
1920 | } | |
1921 | ||
b7b030ad | 1922 | /* See target.h. */ |
159f81f3 | 1923 | |
b7b030ad | 1924 | gdb::unique_xmalloc_ptr<char> |
159f81f3 DJ |
1925 | target_read_stralloc (struct target_ops *ops, enum target_object object, |
1926 | const char *annex) | |
1927 | { | |
39086a0e PA |
1928 | gdb_byte *buffer; |
1929 | char *bufstr; | |
7313baad | 1930 | LONGEST i, transferred; |
159f81f3 | 1931 | |
39086a0e PA |
1932 | transferred = target_read_alloc_1 (ops, object, annex, &buffer, 1); |
1933 | bufstr = (char *) buffer; | |
159f81f3 DJ |
1934 | |
1935 | if (transferred < 0) | |
1936 | return NULL; | |
1937 | ||
1938 | if (transferred == 0) | |
b7b030ad | 1939 | return gdb::unique_xmalloc_ptr<char> (xstrdup ("")); |
159f81f3 | 1940 | |
39086a0e | 1941 | bufstr[transferred] = 0; |
7313baad UW |
1942 | |
1943 | /* Check for embedded NUL bytes; but allow trailing NULs. */ | |
39086a0e PA |
1944 | for (i = strlen (bufstr); i < transferred; i++) |
1945 | if (bufstr[i] != 0) | |
7313baad UW |
1946 | { |
1947 | warning (_("target object %d, annex %s, " | |
1948 | "contained unexpected null characters"), | |
1949 | (int) object, annex ? annex : "(none)"); | |
1950 | break; | |
1951 | } | |
159f81f3 | 1952 | |
b7b030ad | 1953 | return gdb::unique_xmalloc_ptr<char> (bufstr); |
159f81f3 DJ |
1954 | } |
1955 | ||
b6591e8b AC |
1956 | /* Memory transfer methods. */ |
1957 | ||
1958 | void | |
1b0ba102 | 1959 | get_target_memory (struct target_ops *ops, CORE_ADDR addr, gdb_byte *buf, |
b6591e8b AC |
1960 | LONGEST len) |
1961 | { | |
07b82ea5 PA |
1962 | /* This method is used to read from an alternate, non-current |
1963 | target. This read must bypass the overlay support (as symbols | |
1964 | don't match this target), and GDB's internal cache (wrong cache | |
1965 | for this target). */ | |
1966 | if (target_read (ops, TARGET_OBJECT_RAW_MEMORY, NULL, buf, addr, len) | |
b6591e8b | 1967 | != len) |
578d3588 | 1968 | memory_error (TARGET_XFER_E_IO, addr); |
b6591e8b AC |
1969 | } |
1970 | ||
1971 | ULONGEST | |
5d502164 MS |
1972 | get_target_memory_unsigned (struct target_ops *ops, CORE_ADDR addr, |
1973 | int len, enum bfd_endian byte_order) | |
b6591e8b | 1974 | { |
f6519ebc | 1975 | gdb_byte buf[sizeof (ULONGEST)]; |
b6591e8b AC |
1976 | |
1977 | gdb_assert (len <= sizeof (buf)); | |
1978 | get_target_memory (ops, addr, buf, len); | |
e17a4113 | 1979 | return extract_unsigned_integer (buf, len, byte_order); |
b6591e8b AC |
1980 | } |
1981 | ||
3db08215 MM |
1982 | /* See target.h. */ |
1983 | ||
d914c394 SS |
1984 | int |
1985 | target_insert_breakpoint (struct gdbarch *gdbarch, | |
1986 | struct bp_target_info *bp_tgt) | |
1987 | { | |
1988 | if (!may_insert_breakpoints) | |
1989 | { | |
1990 | warning (_("May not insert breakpoints")); | |
1991 | return 1; | |
1992 | } | |
1993 | ||
6b84065d TT |
1994 | return current_target.to_insert_breakpoint (¤t_target, |
1995 | gdbarch, bp_tgt); | |
d914c394 SS |
1996 | } |
1997 | ||
3db08215 MM |
1998 | /* See target.h. */ |
1999 | ||
d914c394 | 2000 | int |
6b84065d | 2001 | target_remove_breakpoint (struct gdbarch *gdbarch, |
73971819 PA |
2002 | struct bp_target_info *bp_tgt, |
2003 | enum remove_bp_reason reason) | |
d914c394 SS |
2004 | { |
2005 | /* This is kind of a weird case to handle, but the permission might | |
2006 | have been changed after breakpoints were inserted - in which case | |
2007 | we should just take the user literally and assume that any | |
2008 | breakpoints should be left in place. */ | |
2009 | if (!may_insert_breakpoints) | |
2010 | { | |
2011 | warning (_("May not remove breakpoints")); | |
2012 | return 1; | |
2013 | } | |
2014 | ||
6b84065d | 2015 | return current_target.to_remove_breakpoint (¤t_target, |
73971819 | 2016 | gdbarch, bp_tgt, reason); |
d914c394 SS |
2017 | } |
2018 | ||
c906108c | 2019 | static void |
1d12d88f | 2020 | info_target_command (const char *args, int from_tty) |
c906108c SS |
2021 | { |
2022 | struct target_ops *t; | |
c906108c | 2023 | int has_all_mem = 0; |
c5aa993b | 2024 | |
c906108c | 2025 | if (symfile_objfile != NULL) |
4262abfb JK |
2026 | printf_unfiltered (_("Symbols from \"%s\".\n"), |
2027 | objfile_name (symfile_objfile)); | |
c906108c | 2028 | |
258b763a | 2029 | for (t = target_stack; t != NULL; t = t->beneath) |
c906108c | 2030 | { |
c35b1492 | 2031 | if (!(*t->to_has_memory) (t)) |
c906108c SS |
2032 | continue; |
2033 | ||
c5aa993b | 2034 | if ((int) (t->to_stratum) <= (int) dummy_stratum) |
c906108c SS |
2035 | continue; |
2036 | if (has_all_mem) | |
3e43a32a MS |
2037 | printf_unfiltered (_("\tWhile running this, " |
2038 | "GDB does not access memory from...\n")); | |
c5aa993b JM |
2039 | printf_unfiltered ("%s:\n", t->to_longname); |
2040 | (t->to_files_info) (t); | |
c35b1492 | 2041 | has_all_mem = (*t->to_has_all_memory) (t); |
c906108c SS |
2042 | } |
2043 | } | |
2044 | ||
fd79ecee DJ |
2045 | /* This function is called before any new inferior is created, e.g. |
2046 | by running a program, attaching, or connecting to a target. | |
2047 | It cleans up any state from previous invocations which might | |
2048 | change between runs. This is a subset of what target_preopen | |
2049 | resets (things which might change between targets). */ | |
2050 | ||
2051 | void | |
2052 | target_pre_inferior (int from_tty) | |
2053 | { | |
c378eb4e | 2054 | /* Clear out solib state. Otherwise the solib state of the previous |
b9db4ced | 2055 | inferior might have survived and is entirely wrong for the new |
c378eb4e | 2056 | target. This has been observed on GNU/Linux using glibc 2.3. How |
b9db4ced UW |
2057 | to reproduce: |
2058 | ||
2059 | bash$ ./foo& | |
2060 | [1] 4711 | |
2061 | bash$ ./foo& | |
2062 | [1] 4712 | |
2063 | bash$ gdb ./foo | |
2064 | [...] | |
2065 | (gdb) attach 4711 | |
2066 | (gdb) detach | |
2067 | (gdb) attach 4712 | |
2068 | Cannot access memory at address 0xdeadbeef | |
2069 | */ | |
b9db4ced | 2070 | |
50c71eaf PA |
2071 | /* In some OSs, the shared library list is the same/global/shared |
2072 | across inferiors. If code is shared between processes, so are | |
2073 | memory regions and features. */ | |
f5656ead | 2074 | if (!gdbarch_has_global_solist (target_gdbarch ())) |
50c71eaf PA |
2075 | { |
2076 | no_shared_libraries (NULL, from_tty); | |
2077 | ||
2078 | invalidate_target_mem_regions (); | |
424163ea | 2079 | |
50c71eaf PA |
2080 | target_clear_description (); |
2081 | } | |
8ffcbaaf | 2082 | |
e9756d52 PP |
2083 | /* attach_flag may be set if the previous process associated with |
2084 | the inferior was attached to. */ | |
2085 | current_inferior ()->attach_flag = 0; | |
2086 | ||
5d5658a1 PA |
2087 | current_inferior ()->highest_thread_num = 0; |
2088 | ||
8ffcbaaf | 2089 | agent_capability_invalidate (); |
fd79ecee DJ |
2090 | } |
2091 | ||
b8fa0bfa PA |
2092 | /* Callback for iterate_over_inferiors. Gets rid of the given |
2093 | inferior. */ | |
2094 | ||
2095 | static int | |
2096 | dispose_inferior (struct inferior *inf, void *args) | |
2097 | { | |
2098 | struct thread_info *thread; | |
2099 | ||
2100 | thread = any_thread_of_process (inf->pid); | |
2101 | if (thread) | |
2102 | { | |
2103 | switch_to_thread (thread->ptid); | |
2104 | ||
2105 | /* Core inferiors actually should be detached, not killed. */ | |
2106 | if (target_has_execution) | |
2107 | target_kill (); | |
2108 | else | |
2109 | target_detach (NULL, 0); | |
2110 | } | |
2111 | ||
2112 | return 0; | |
2113 | } | |
2114 | ||
c906108c SS |
2115 | /* This is to be called by the open routine before it does |
2116 | anything. */ | |
2117 | ||
2118 | void | |
fba45db2 | 2119 | target_preopen (int from_tty) |
c906108c | 2120 | { |
c5aa993b | 2121 | dont_repeat (); |
c906108c | 2122 | |
b8fa0bfa | 2123 | if (have_inferiors ()) |
c5aa993b | 2124 | { |
adf40b2e | 2125 | if (!from_tty |
b8fa0bfa PA |
2126 | || !have_live_inferiors () |
2127 | || query (_("A program is being debugged already. Kill it? "))) | |
2128 | iterate_over_inferiors (dispose_inferior, NULL); | |
c906108c | 2129 | else |
8a3fe4f8 | 2130 | error (_("Program not killed.")); |
c906108c SS |
2131 | } |
2132 | ||
2133 | /* Calling target_kill may remove the target from the stack. But if | |
2134 | it doesn't (which seems like a win for UDI), remove it now. */ | |
87ab71f0 PA |
2135 | /* Leave the exec target, though. The user may be switching from a |
2136 | live process to a core of the same program. */ | |
460014f5 | 2137 | pop_all_targets_above (file_stratum); |
fd79ecee DJ |
2138 | |
2139 | target_pre_inferior (from_tty); | |
c906108c SS |
2140 | } |
2141 | ||
2142 | /* Detach a target after doing deferred register stores. */ | |
2143 | ||
2144 | void | |
52554a0e | 2145 | target_detach (const char *args, int from_tty) |
c906108c | 2146 | { |
f5656ead | 2147 | if (gdbarch_has_global_breakpoints (target_gdbarch ())) |
50c71eaf PA |
2148 | /* Don't remove global breakpoints here. They're removed on |
2149 | disconnection from the target. */ | |
2150 | ; | |
2151 | else | |
2152 | /* If we're in breakpoints-always-inserted mode, have to remove | |
2153 | them before detaching. */ | |
dfd4cc63 | 2154 | remove_breakpoints_pid (ptid_get_pid (inferior_ptid)); |
74960c60 | 2155 | |
24291992 PA |
2156 | prepare_for_detach (); |
2157 | ||
09da0d0a | 2158 | current_target.to_detach (¤t_target, args, from_tty); |
c906108c SS |
2159 | } |
2160 | ||
6ad8ae5c | 2161 | void |
fee354ee | 2162 | target_disconnect (const char *args, int from_tty) |
6ad8ae5c | 2163 | { |
50c71eaf PA |
2164 | /* If we're in breakpoints-always-inserted mode or if breakpoints |
2165 | are global across processes, we have to remove them before | |
2166 | disconnecting. */ | |
74960c60 VP |
2167 | remove_breakpoints (); |
2168 | ||
86a0854a | 2169 | current_target.to_disconnect (¤t_target, args, from_tty); |
6ad8ae5c DJ |
2170 | } |
2171 | ||
f2b9e3df SDJ |
2172 | /* See target/target.h. */ |
2173 | ||
117de6a9 | 2174 | ptid_t |
47608cb1 | 2175 | target_wait (ptid_t ptid, struct target_waitstatus *status, int options) |
117de6a9 | 2176 | { |
a7068b60 | 2177 | return (current_target.to_wait) (¤t_target, ptid, status, options); |
117de6a9 PA |
2178 | } |
2179 | ||
0b333c5e PA |
2180 | /* See target.h. */ |
2181 | ||
2182 | ptid_t | |
2183 | default_target_wait (struct target_ops *ops, | |
2184 | ptid_t ptid, struct target_waitstatus *status, | |
2185 | int options) | |
2186 | { | |
2187 | status->kind = TARGET_WAITKIND_IGNORE; | |
2188 | return minus_one_ptid; | |
2189 | } | |
2190 | ||
7a114964 | 2191 | const char * |
117de6a9 PA |
2192 | target_pid_to_str (ptid_t ptid) |
2193 | { | |
770234d3 | 2194 | return (*current_target.to_pid_to_str) (¤t_target, ptid); |
117de6a9 PA |
2195 | } |
2196 | ||
73ede765 | 2197 | const char * |
4694da01 TT |
2198 | target_thread_name (struct thread_info *info) |
2199 | { | |
825828fc | 2200 | return current_target.to_thread_name (¤t_target, info); |
4694da01 TT |
2201 | } |
2202 | ||
e04ee09e KB |
2203 | struct thread_info * |
2204 | target_thread_handle_to_thread_info (const gdb_byte *thread_handle, | |
2205 | int handle_len, | |
2206 | struct inferior *inf) | |
2207 | { | |
2208 | return current_target.to_thread_handle_to_thread_info | |
2209 | (¤t_target, thread_handle, handle_len, inf); | |
2210 | } | |
2211 | ||
e1ac3328 | 2212 | void |
2ea28649 | 2213 | target_resume (ptid_t ptid, int step, enum gdb_signal signal) |
e1ac3328 | 2214 | { |
4e5d721f | 2215 | target_dcache_invalidate (); |
28439f5e | 2216 | |
6b84065d | 2217 | current_target.to_resume (¤t_target, ptid, step, signal); |
28439f5e | 2218 | |
6b84065d | 2219 | registers_changed_ptid (ptid); |
251bde03 PA |
2220 | /* We only set the internal executing state here. The user/frontend |
2221 | running state is set at a higher level. */ | |
6b84065d | 2222 | set_executing (ptid, 1); |
6b84065d | 2223 | clear_inline_frame_state (ptid); |
e1ac3328 | 2224 | } |
2455069d | 2225 | |
85ad3aaf PA |
2226 | /* If true, target_commit_resume is a nop. */ |
2227 | static int defer_target_commit_resume; | |
2228 | ||
2229 | /* See target.h. */ | |
2230 | ||
2231 | void | |
2232 | target_commit_resume (void) | |
2233 | { | |
2234 | struct target_ops *t; | |
2235 | ||
2236 | if (defer_target_commit_resume) | |
2237 | return; | |
2238 | ||
2239 | current_target.to_commit_resume (¤t_target); | |
2240 | } | |
2241 | ||
2242 | /* See target.h. */ | |
2243 | ||
a9bc57b9 TT |
2244 | scoped_restore_tmpl<int> |
2245 | make_scoped_defer_target_commit_resume () | |
85ad3aaf | 2246 | { |
a9bc57b9 | 2247 | return make_scoped_restore (&defer_target_commit_resume, 1); |
85ad3aaf PA |
2248 | } |
2249 | ||
2455069d UW |
2250 | void |
2251 | target_pass_signals (int numsigs, unsigned char *pass_signals) | |
2252 | { | |
035cad7f | 2253 | (*current_target.to_pass_signals) (¤t_target, numsigs, pass_signals); |
2455069d UW |
2254 | } |
2255 | ||
9b224c5e PA |
2256 | void |
2257 | target_program_signals (int numsigs, unsigned char *program_signals) | |
2258 | { | |
7d4f8efa TT |
2259 | (*current_target.to_program_signals) (¤t_target, |
2260 | numsigs, program_signals); | |
9b224c5e PA |
2261 | } |
2262 | ||
098dba18 TT |
2263 | static int |
2264 | default_follow_fork (struct target_ops *self, int follow_child, | |
2265 | int detach_fork) | |
2266 | { | |
2267 | /* Some target returned a fork event, but did not know how to follow it. */ | |
2268 | internal_error (__FILE__, __LINE__, | |
2269 | _("could not find a target to follow fork")); | |
2270 | } | |
2271 | ||
ee057212 DJ |
2272 | /* Look through the list of possible targets for a target that can |
2273 | follow forks. */ | |
2274 | ||
2275 | int | |
07107ca6 | 2276 | target_follow_fork (int follow_child, int detach_fork) |
ee057212 | 2277 | { |
a7068b60 TT |
2278 | return current_target.to_follow_fork (¤t_target, |
2279 | follow_child, detach_fork); | |
ee057212 DJ |
2280 | } |
2281 | ||
94585166 DB |
2282 | /* Target wrapper for follow exec hook. */ |
2283 | ||
2284 | void | |
2285 | target_follow_exec (struct inferior *inf, char *execd_pathname) | |
2286 | { | |
2287 | current_target.to_follow_exec (¤t_target, inf, execd_pathname); | |
2288 | } | |
2289 | ||
8d657035 TT |
2290 | static void |
2291 | default_mourn_inferior (struct target_ops *self) | |
2292 | { | |
2293 | internal_error (__FILE__, __LINE__, | |
2294 | _("could not find a target to follow mourn inferior")); | |
2295 | } | |
2296 | ||
136d6dae | 2297 | void |
bc1e6c81 | 2298 | target_mourn_inferior (ptid_t ptid) |
136d6dae | 2299 | { |
bc1e6c81 | 2300 | gdb_assert (ptid_equal (ptid, inferior_ptid)); |
8d657035 | 2301 | current_target.to_mourn_inferior (¤t_target); |
136d6dae | 2302 | |
8d657035 TT |
2303 | /* We no longer need to keep handles on any of the object files. |
2304 | Make sure to release them to avoid unnecessarily locking any | |
2305 | of them while we're not actually debugging. */ | |
2306 | bfd_cache_close_all (); | |
136d6dae VP |
2307 | } |
2308 | ||
424163ea DJ |
2309 | /* Look for a target which can describe architectural features, starting |
2310 | from TARGET. If we find one, return its description. */ | |
2311 | ||
2312 | const struct target_desc * | |
2313 | target_read_description (struct target_ops *target) | |
2314 | { | |
2117c711 | 2315 | return target->to_read_description (target); |
424163ea DJ |
2316 | } |
2317 | ||
58a5184e | 2318 | /* This implements a basic search of memory, reading target memory and |
08388c79 DE |
2319 | performing the search here (as opposed to performing the search in on the |
2320 | target side with, for example, gdbserver). */ | |
2321 | ||
2322 | int | |
2323 | simple_search_memory (struct target_ops *ops, | |
2324 | CORE_ADDR start_addr, ULONGEST search_space_len, | |
2325 | const gdb_byte *pattern, ULONGEST pattern_len, | |
2326 | CORE_ADDR *found_addrp) | |
2327 | { | |
2328 | /* NOTE: also defined in find.c testcase. */ | |
2329 | #define SEARCH_CHUNK_SIZE 16000 | |
2330 | const unsigned chunk_size = SEARCH_CHUNK_SIZE; | |
2331 | /* Buffer to hold memory contents for searching. */ | |
08388c79 | 2332 | unsigned search_buf_size; |
08388c79 DE |
2333 | |
2334 | search_buf_size = chunk_size + pattern_len - 1; | |
2335 | ||
2336 | /* No point in trying to allocate a buffer larger than the search space. */ | |
2337 | if (search_space_len < search_buf_size) | |
2338 | search_buf_size = search_space_len; | |
2339 | ||
26fcd5d7 | 2340 | gdb::byte_vector search_buf (search_buf_size); |
08388c79 DE |
2341 | |
2342 | /* Prime the search buffer. */ | |
2343 | ||
2344 | if (target_read (ops, TARGET_OBJECT_MEMORY, NULL, | |
26fcd5d7 TT |
2345 | search_buf.data (), start_addr, search_buf_size) |
2346 | != search_buf_size) | |
08388c79 | 2347 | { |
b3dc46ff AB |
2348 | warning (_("Unable to access %s bytes of target " |
2349 | "memory at %s, halting search."), | |
2350 | pulongest (search_buf_size), hex_string (start_addr)); | |
08388c79 DE |
2351 | return -1; |
2352 | } | |
2353 | ||
2354 | /* Perform the search. | |
2355 | ||
2356 | The loop is kept simple by allocating [N + pattern-length - 1] bytes. | |
2357 | When we've scanned N bytes we copy the trailing bytes to the start and | |
2358 | read in another N bytes. */ | |
2359 | ||
2360 | while (search_space_len >= pattern_len) | |
2361 | { | |
2362 | gdb_byte *found_ptr; | |
325fac50 PA |
2363 | unsigned nr_search_bytes |
2364 | = std::min (search_space_len, (ULONGEST) search_buf_size); | |
08388c79 | 2365 | |
26fcd5d7 | 2366 | found_ptr = (gdb_byte *) memmem (search_buf.data (), nr_search_bytes, |
d7f3ff3e | 2367 | pattern, pattern_len); |
08388c79 DE |
2368 | |
2369 | if (found_ptr != NULL) | |
2370 | { | |
26fcd5d7 | 2371 | CORE_ADDR found_addr = start_addr + (found_ptr - search_buf.data ()); |
5d502164 | 2372 | |
08388c79 | 2373 | *found_addrp = found_addr; |
08388c79 DE |
2374 | return 1; |
2375 | } | |
2376 | ||
2377 | /* Not found in this chunk, skip to next chunk. */ | |
2378 | ||
2379 | /* Don't let search_space_len wrap here, it's unsigned. */ | |
2380 | if (search_space_len >= chunk_size) | |
2381 | search_space_len -= chunk_size; | |
2382 | else | |
2383 | search_space_len = 0; | |
2384 | ||
2385 | if (search_space_len >= pattern_len) | |
2386 | { | |
2387 | unsigned keep_len = search_buf_size - chunk_size; | |
8a35fb51 | 2388 | CORE_ADDR read_addr = start_addr + chunk_size + keep_len; |
08388c79 DE |
2389 | int nr_to_read; |
2390 | ||
2391 | /* Copy the trailing part of the previous iteration to the front | |
2392 | of the buffer for the next iteration. */ | |
2393 | gdb_assert (keep_len == pattern_len - 1); | |
26fcd5d7 | 2394 | memcpy (&search_buf[0], &search_buf[chunk_size], keep_len); |
08388c79 | 2395 | |
325fac50 PA |
2396 | nr_to_read = std::min (search_space_len - keep_len, |
2397 | (ULONGEST) chunk_size); | |
08388c79 DE |
2398 | |
2399 | if (target_read (ops, TARGET_OBJECT_MEMORY, NULL, | |
26fcd5d7 | 2400 | &search_buf[keep_len], read_addr, |
08388c79 DE |
2401 | nr_to_read) != nr_to_read) |
2402 | { | |
b3dc46ff | 2403 | warning (_("Unable to access %s bytes of target " |
9b20d036 | 2404 | "memory at %s, halting search."), |
b3dc46ff | 2405 | plongest (nr_to_read), |
08388c79 | 2406 | hex_string (read_addr)); |
08388c79 DE |
2407 | return -1; |
2408 | } | |
2409 | ||
2410 | start_addr += chunk_size; | |
2411 | } | |
2412 | } | |
2413 | ||
2414 | /* Not found. */ | |
2415 | ||
08388c79 DE |
2416 | return 0; |
2417 | } | |
2418 | ||
58a5184e TT |
2419 | /* Default implementation of memory-searching. */ |
2420 | ||
2421 | static int | |
2422 | default_search_memory (struct target_ops *self, | |
2423 | CORE_ADDR start_addr, ULONGEST search_space_len, | |
2424 | const gdb_byte *pattern, ULONGEST pattern_len, | |
2425 | CORE_ADDR *found_addrp) | |
2426 | { | |
2427 | /* Start over from the top of the target stack. */ | |
2428 | return simple_search_memory (current_target.beneath, | |
2429 | start_addr, search_space_len, | |
2430 | pattern, pattern_len, found_addrp); | |
2431 | } | |
2432 | ||
08388c79 DE |
2433 | /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the |
2434 | sequence of bytes in PATTERN with length PATTERN_LEN. | |
2435 | ||
2436 | The result is 1 if found, 0 if not found, and -1 if there was an error | |
2437 | requiring halting of the search (e.g. memory read error). | |
2438 | If the pattern is found the address is recorded in FOUND_ADDRP. */ | |
2439 | ||
2440 | int | |
2441 | target_search_memory (CORE_ADDR start_addr, ULONGEST search_space_len, | |
2442 | const gdb_byte *pattern, ULONGEST pattern_len, | |
2443 | CORE_ADDR *found_addrp) | |
2444 | { | |
a7068b60 TT |
2445 | return current_target.to_search_memory (¤t_target, start_addr, |
2446 | search_space_len, | |
2447 | pattern, pattern_len, found_addrp); | |
08388c79 DE |
2448 | } |
2449 | ||
8edfe269 DJ |
2450 | /* Look through the currently pushed targets. If none of them will |
2451 | be able to restart the currently running process, issue an error | |
2452 | message. */ | |
2453 | ||
2454 | void | |
2455 | target_require_runnable (void) | |
2456 | { | |
2457 | struct target_ops *t; | |
2458 | ||
2459 | for (t = target_stack; t != NULL; t = t->beneath) | |
2460 | { | |
2461 | /* If this target knows how to create a new program, then | |
2462 | assume we will still be able to after killing the current | |
2463 | one. Either killing and mourning will not pop T, or else | |
2464 | find_default_run_target will find it again. */ | |
2465 | if (t->to_create_inferior != NULL) | |
2466 | return; | |
2467 | ||
548740d6 | 2468 | /* Do not worry about targets at certain strata that can not |
8edfe269 DJ |
2469 | create inferiors. Assume they will be pushed again if |
2470 | necessary, and continue to the process_stratum. */ | |
85e747d2 | 2471 | if (t->to_stratum == thread_stratum |
548740d6 | 2472 | || t->to_stratum == record_stratum |
85e747d2 | 2473 | || t->to_stratum == arch_stratum) |
8edfe269 DJ |
2474 | continue; |
2475 | ||
3e43a32a MS |
2476 | error (_("The \"%s\" target does not support \"run\". " |
2477 | "Try \"help target\" or \"continue\"."), | |
8edfe269 DJ |
2478 | t->to_shortname); |
2479 | } | |
2480 | ||
2481 | /* This function is only called if the target is running. In that | |
2482 | case there should have been a process_stratum target and it | |
c378eb4e | 2483 | should either know how to create inferiors, or not... */ |
9b20d036 | 2484 | internal_error (__FILE__, __LINE__, _("No targets found")); |
8edfe269 DJ |
2485 | } |
2486 | ||
6a3cb8e8 PA |
2487 | /* Whether GDB is allowed to fall back to the default run target for |
2488 | "run", "attach", etc. when no target is connected yet. */ | |
2489 | static int auto_connect_native_target = 1; | |
2490 | ||
2491 | static void | |
2492 | show_auto_connect_native_target (struct ui_file *file, int from_tty, | |
2493 | struct cmd_list_element *c, const char *value) | |
2494 | { | |
2495 | fprintf_filtered (file, | |
2496 | _("Whether GDB may automatically connect to the " | |
2497 | "native target is %s.\n"), | |
2498 | value); | |
2499 | } | |
2500 | ||
c906108c SS |
2501 | /* Look through the list of possible targets for a target that can |
2502 | execute a run or attach command without any other data. This is | |
2503 | used to locate the default process stratum. | |
2504 | ||
5f667f2d PA |
2505 | If DO_MESG is not NULL, the result is always valid (error() is |
2506 | called for errors); else, return NULL on error. */ | |
c906108c SS |
2507 | |
2508 | static struct target_ops * | |
a121b7c1 | 2509 | find_default_run_target (const char *do_mesg) |
c906108c | 2510 | { |
c906108c | 2511 | struct target_ops *runable = NULL; |
c906108c | 2512 | |
6a3cb8e8 | 2513 | if (auto_connect_native_target) |
c906108c | 2514 | { |
89a1c21a | 2515 | struct target_ops *t; |
6a3cb8e8 | 2516 | int count = 0; |
89a1c21a | 2517 | int i; |
6a3cb8e8 | 2518 | |
89a1c21a | 2519 | for (i = 0; VEC_iterate (target_ops_p, target_structs, i, t); ++i) |
c906108c | 2520 | { |
89a1c21a | 2521 | if (t->to_can_run != delegate_can_run && target_can_run (t)) |
6a3cb8e8 | 2522 | { |
89a1c21a | 2523 | runable = t; |
6a3cb8e8 PA |
2524 | ++count; |
2525 | } | |
c906108c | 2526 | } |
6a3cb8e8 PA |
2527 | |
2528 | if (count != 1) | |
2529 | runable = NULL; | |
c906108c SS |
2530 | } |
2531 | ||
6a3cb8e8 | 2532 | if (runable == NULL) |
5f667f2d PA |
2533 | { |
2534 | if (do_mesg) | |
2535 | error (_("Don't know how to %s. Try \"help target\"."), do_mesg); | |
2536 | else | |
2537 | return NULL; | |
2538 | } | |
c906108c SS |
2539 | |
2540 | return runable; | |
2541 | } | |
2542 | ||
b3ccfe11 | 2543 | /* See target.h. */ |
c906108c | 2544 | |
b3ccfe11 TT |
2545 | struct target_ops * |
2546 | find_attach_target (void) | |
c906108c SS |
2547 | { |
2548 | struct target_ops *t; | |
2549 | ||
b3ccfe11 TT |
2550 | /* If a target on the current stack can attach, use it. */ |
2551 | for (t = current_target.beneath; t != NULL; t = t->beneath) | |
2552 | { | |
2553 | if (t->to_attach != NULL) | |
2554 | break; | |
2555 | } | |
c906108c | 2556 | |
b3ccfe11 TT |
2557 | /* Otherwise, use the default run target for attaching. */ |
2558 | if (t == NULL) | |
2559 | t = find_default_run_target ("attach"); | |
b84876c2 | 2560 | |
b3ccfe11 | 2561 | return t; |
b84876c2 PA |
2562 | } |
2563 | ||
b3ccfe11 | 2564 | /* See target.h. */ |
b84876c2 | 2565 | |
b3ccfe11 TT |
2566 | struct target_ops * |
2567 | find_run_target (void) | |
9908b566 VP |
2568 | { |
2569 | struct target_ops *t; | |
2570 | ||
b3ccfe11 TT |
2571 | /* If a target on the current stack can attach, use it. */ |
2572 | for (t = current_target.beneath; t != NULL; t = t->beneath) | |
2573 | { | |
2574 | if (t->to_create_inferior != NULL) | |
2575 | break; | |
2576 | } | |
5d502164 | 2577 | |
b3ccfe11 TT |
2578 | /* Otherwise, use the default run target. */ |
2579 | if (t == NULL) | |
2580 | t = find_default_run_target ("run"); | |
9908b566 | 2581 | |
b3ccfe11 | 2582 | return t; |
9908b566 VP |
2583 | } |
2584 | ||
145b16a9 UW |
2585 | /* Implement the "info proc" command. */ |
2586 | ||
451b7c33 | 2587 | int |
7bc112c1 | 2588 | target_info_proc (const char *args, enum info_proc_what what) |
145b16a9 UW |
2589 | { |
2590 | struct target_ops *t; | |
2591 | ||
2592 | /* If we're already connected to something that can get us OS | |
2593 | related data, use it. Otherwise, try using the native | |
2594 | target. */ | |
2595 | if (current_target.to_stratum >= process_stratum) | |
2596 | t = current_target.beneath; | |
2597 | else | |
2598 | t = find_default_run_target (NULL); | |
2599 | ||
2600 | for (; t != NULL; t = t->beneath) | |
2601 | { | |
2602 | if (t->to_info_proc != NULL) | |
2603 | { | |
2604 | t->to_info_proc (t, args, what); | |
2605 | ||
2606 | if (targetdebug) | |
2607 | fprintf_unfiltered (gdb_stdlog, | |
2608 | "target_info_proc (\"%s\", %d)\n", args, what); | |
2609 | ||
451b7c33 | 2610 | return 1; |
145b16a9 UW |
2611 | } |
2612 | } | |
2613 | ||
451b7c33 | 2614 | return 0; |
145b16a9 UW |
2615 | } |
2616 | ||
03583c20 | 2617 | static int |
2bfc0540 | 2618 | find_default_supports_disable_randomization (struct target_ops *self) |
03583c20 UW |
2619 | { |
2620 | struct target_ops *t; | |
2621 | ||
2622 | t = find_default_run_target (NULL); | |
2623 | if (t && t->to_supports_disable_randomization) | |
2bfc0540 | 2624 | return (t->to_supports_disable_randomization) (t); |
03583c20 UW |
2625 | return 0; |
2626 | } | |
2627 | ||
2628 | int | |
2629 | target_supports_disable_randomization (void) | |
2630 | { | |
2631 | struct target_ops *t; | |
2632 | ||
2633 | for (t = ¤t_target; t != NULL; t = t->beneath) | |
2634 | if (t->to_supports_disable_randomization) | |
2bfc0540 | 2635 | return t->to_supports_disable_randomization (t); |
03583c20 UW |
2636 | |
2637 | return 0; | |
2638 | } | |
9908b566 | 2639 | |
1fb77080 SDJ |
2640 | /* See target/target.h. */ |
2641 | ||
2642 | int | |
2643 | target_supports_multi_process (void) | |
2644 | { | |
2645 | return (*current_target.to_supports_multi_process) (¤t_target); | |
2646 | } | |
2647 | ||
b7b030ad TT |
2648 | /* See target.h. */ |
2649 | ||
2650 | gdb::unique_xmalloc_ptr<char> | |
07e059b5 VP |
2651 | target_get_osdata (const char *type) |
2652 | { | |
07e059b5 VP |
2653 | struct target_ops *t; |
2654 | ||
739ef7fb PA |
2655 | /* If we're already connected to something that can get us OS |
2656 | related data, use it. Otherwise, try using the native | |
2657 | target. */ | |
2658 | if (current_target.to_stratum >= process_stratum) | |
6d097e65 | 2659 | t = current_target.beneath; |
739ef7fb PA |
2660 | else |
2661 | t = find_default_run_target ("get OS data"); | |
07e059b5 VP |
2662 | |
2663 | if (!t) | |
2664 | return NULL; | |
2665 | ||
6d097e65 | 2666 | return target_read_stralloc (t, TARGET_OBJECT_OSDATA, type); |
07e059b5 VP |
2667 | } |
2668 | ||
8eaff7cd TT |
2669 | static struct address_space * |
2670 | default_thread_address_space (struct target_ops *self, ptid_t ptid) | |
6c95b8df PA |
2671 | { |
2672 | struct inferior *inf; | |
6c95b8df PA |
2673 | |
2674 | /* Fall-back to the "main" address space of the inferior. */ | |
c9657e70 | 2675 | inf = find_inferior_ptid (ptid); |
6c95b8df PA |
2676 | |
2677 | if (inf == NULL || inf->aspace == NULL) | |
3e43a32a | 2678 | internal_error (__FILE__, __LINE__, |
9b20d036 MS |
2679 | _("Can't determine the current " |
2680 | "address space of thread %s\n"), | |
6c95b8df PA |
2681 | target_pid_to_str (ptid)); |
2682 | ||
2683 | return inf->aspace; | |
2684 | } | |
2685 | ||
8eaff7cd TT |
2686 | /* Determine the current address space of thread PTID. */ |
2687 | ||
2688 | struct address_space * | |
2689 | target_thread_address_space (ptid_t ptid) | |
2690 | { | |
2691 | struct address_space *aspace; | |
2692 | ||
2693 | aspace = current_target.to_thread_address_space (¤t_target, ptid); | |
2694 | gdb_assert (aspace != NULL); | |
2695 | ||
8eaff7cd TT |
2696 | return aspace; |
2697 | } | |
2698 | ||
7313baad UW |
2699 | |
2700 | /* Target file operations. */ | |
2701 | ||
2702 | static struct target_ops * | |
2703 | default_fileio_target (void) | |
2704 | { | |
2705 | /* If we're already connected to something that can perform | |
2706 | file I/O, use it. Otherwise, try using the native target. */ | |
2707 | if (current_target.to_stratum >= process_stratum) | |
2708 | return current_target.beneath; | |
2709 | else | |
2710 | return find_default_run_target ("file I/O"); | |
2711 | } | |
2712 | ||
1c4b552b GB |
2713 | /* File handle for target file operations. */ |
2714 | ||
2715 | typedef struct | |
2716 | { | |
2717 | /* The target on which this file is open. */ | |
2718 | struct target_ops *t; | |
2719 | ||
2720 | /* The file descriptor on the target. */ | |
2721 | int fd; | |
2722 | } fileio_fh_t; | |
2723 | ||
2724 | DEF_VEC_O (fileio_fh_t); | |
2725 | ||
2726 | /* Vector of currently open file handles. The value returned by | |
2727 | target_fileio_open and passed as the FD argument to other | |
2728 | target_fileio_* functions is an index into this vector. This | |
2729 | vector's entries are never freed; instead, files are marked as | |
2730 | closed, and the handle becomes available for reuse. */ | |
2731 | static VEC (fileio_fh_t) *fileio_fhandles; | |
2732 | ||
2733 | /* Macro to check whether a fileio_fh_t represents a closed file. */ | |
2734 | #define is_closed_fileio_fh(fd) ((fd) < 0) | |
2735 | ||
2736 | /* Index into fileio_fhandles of the lowest handle that might be | |
2737 | closed. This permits handle reuse without searching the whole | |
2738 | list each time a new file is opened. */ | |
2739 | static int lowest_closed_fd; | |
2740 | ||
2741 | /* Acquire a target fileio file descriptor. */ | |
2742 | ||
2743 | static int | |
2744 | acquire_fileio_fd (struct target_ops *t, int fd) | |
2745 | { | |
870f88f7 | 2746 | fileio_fh_t *fh; |
1c4b552b GB |
2747 | |
2748 | gdb_assert (!is_closed_fileio_fh (fd)); | |
2749 | ||
2750 | /* Search for closed handles to reuse. */ | |
2751 | for (; | |
2752 | VEC_iterate (fileio_fh_t, fileio_fhandles, | |
2753 | lowest_closed_fd, fh); | |
2754 | lowest_closed_fd++) | |
2755 | if (is_closed_fileio_fh (fh->fd)) | |
2756 | break; | |
2757 | ||
2758 | /* Push a new handle if no closed handles were found. */ | |
2759 | if (lowest_closed_fd == VEC_length (fileio_fh_t, fileio_fhandles)) | |
2760 | fh = VEC_safe_push (fileio_fh_t, fileio_fhandles, NULL); | |
2761 | ||
2762 | /* Fill in the handle. */ | |
2763 | fh->t = t; | |
2764 | fh->fd = fd; | |
2765 | ||
2766 | /* Return its index, and start the next lookup at | |
2767 | the next index. */ | |
2768 | return lowest_closed_fd++; | |
2769 | } | |
2770 | ||
2771 | /* Release a target fileio file descriptor. */ | |
2772 | ||
2773 | static void | |
2774 | release_fileio_fd (int fd, fileio_fh_t *fh) | |
2775 | { | |
2776 | fh->fd = -1; | |
325fac50 | 2777 | lowest_closed_fd = std::min (lowest_closed_fd, fd); |
1c4b552b GB |
2778 | } |
2779 | ||
2780 | /* Return a pointer to the fileio_fhandle_t corresponding to FD. */ | |
2781 | ||
2782 | #define fileio_fd_to_fh(fd) \ | |
2783 | VEC_index (fileio_fh_t, fileio_fhandles, (fd)) | |
2784 | ||
4313b8c0 GB |
2785 | /* Helper for target_fileio_open and |
2786 | target_fileio_open_warn_if_slow. */ | |
12e2a5fd | 2787 | |
4313b8c0 GB |
2788 | static int |
2789 | target_fileio_open_1 (struct inferior *inf, const char *filename, | |
2790 | int flags, int mode, int warn_if_slow, | |
2791 | int *target_errno) | |
7313baad UW |
2792 | { |
2793 | struct target_ops *t; | |
2794 | ||
2795 | for (t = default_fileio_target (); t != NULL; t = t->beneath) | |
2796 | { | |
2797 | if (t->to_fileio_open != NULL) | |
2798 | { | |
07c138c8 | 2799 | int fd = t->to_fileio_open (t, inf, filename, flags, mode, |
4313b8c0 | 2800 | warn_if_slow, target_errno); |
7313baad | 2801 | |
1c4b552b GB |
2802 | if (fd < 0) |
2803 | fd = -1; | |
2804 | else | |
2805 | fd = acquire_fileio_fd (t, fd); | |
2806 | ||
7313baad UW |
2807 | if (targetdebug) |
2808 | fprintf_unfiltered (gdb_stdlog, | |
4313b8c0 | 2809 | "target_fileio_open (%d,%s,0x%x,0%o,%d)" |
07c138c8 GB |
2810 | " = %d (%d)\n", |
2811 | inf == NULL ? 0 : inf->num, | |
7313baad | 2812 | filename, flags, mode, |
4313b8c0 GB |
2813 | warn_if_slow, fd, |
2814 | fd != -1 ? 0 : *target_errno); | |
7313baad UW |
2815 | return fd; |
2816 | } | |
2817 | } | |
2818 | ||
2819 | *target_errno = FILEIO_ENOSYS; | |
2820 | return -1; | |
2821 | } | |
2822 | ||
12e2a5fd GB |
2823 | /* See target.h. */ |
2824 | ||
4313b8c0 GB |
2825 | int |
2826 | target_fileio_open (struct inferior *inf, const char *filename, | |
2827 | int flags, int mode, int *target_errno) | |
2828 | { | |
2829 | return target_fileio_open_1 (inf, filename, flags, mode, 0, | |
2830 | target_errno); | |
2831 | } | |
2832 | ||
2833 | /* See target.h. */ | |
2834 | ||
2835 | int | |
2836 | target_fileio_open_warn_if_slow (struct inferior *inf, | |
2837 | const char *filename, | |
2838 | int flags, int mode, int *target_errno) | |
2839 | { | |
2840 | return target_fileio_open_1 (inf, filename, flags, mode, 1, | |
2841 | target_errno); | |
2842 | } | |
2843 | ||
2844 | /* See target.h. */ | |
2845 | ||
7313baad UW |
2846 | int |
2847 | target_fileio_pwrite (int fd, const gdb_byte *write_buf, int len, | |
2848 | ULONGEST offset, int *target_errno) | |
2849 | { | |
1c4b552b GB |
2850 | fileio_fh_t *fh = fileio_fd_to_fh (fd); |
2851 | int ret = -1; | |
7313baad | 2852 | |
1c4b552b GB |
2853 | if (is_closed_fileio_fh (fh->fd)) |
2854 | *target_errno = EBADF; | |
2855 | else | |
2856 | ret = fh->t->to_fileio_pwrite (fh->t, fh->fd, write_buf, | |
2857 | len, offset, target_errno); | |
7313baad | 2858 | |
1c4b552b GB |
2859 | if (targetdebug) |
2860 | fprintf_unfiltered (gdb_stdlog, | |
2861 | "target_fileio_pwrite (%d,...,%d,%s) " | |
2862 | "= %d (%d)\n", | |
2863 | fd, len, pulongest (offset), | |
2864 | ret, ret != -1 ? 0 : *target_errno); | |
2865 | return ret; | |
7313baad UW |
2866 | } |
2867 | ||
12e2a5fd GB |
2868 | /* See target.h. */ |
2869 | ||
7313baad UW |
2870 | int |
2871 | target_fileio_pread (int fd, gdb_byte *read_buf, int len, | |
2872 | ULONGEST offset, int *target_errno) | |
2873 | { | |
1c4b552b GB |
2874 | fileio_fh_t *fh = fileio_fd_to_fh (fd); |
2875 | int ret = -1; | |
7313baad | 2876 | |
1c4b552b GB |
2877 | if (is_closed_fileio_fh (fh->fd)) |
2878 | *target_errno = EBADF; | |
2879 | else | |
2880 | ret = fh->t->to_fileio_pread (fh->t, fh->fd, read_buf, | |
2881 | len, offset, target_errno); | |
7313baad | 2882 | |
1c4b552b GB |
2883 | if (targetdebug) |
2884 | fprintf_unfiltered (gdb_stdlog, | |
2885 | "target_fileio_pread (%d,...,%d,%s) " | |
2886 | "= %d (%d)\n", | |
2887 | fd, len, pulongest (offset), | |
2888 | ret, ret != -1 ? 0 : *target_errno); | |
9b15c1f0 GB |
2889 | return ret; |
2890 | } | |
2891 | ||
2892 | /* See target.h. */ | |
12e2a5fd | 2893 | |
9b15c1f0 GB |
2894 | int |
2895 | target_fileio_fstat (int fd, struct stat *sb, int *target_errno) | |
2896 | { | |
2897 | fileio_fh_t *fh = fileio_fd_to_fh (fd); | |
2898 | int ret = -1; | |
2899 | ||
2900 | if (is_closed_fileio_fh (fh->fd)) | |
2901 | *target_errno = EBADF; | |
2902 | else | |
2903 | ret = fh->t->to_fileio_fstat (fh->t, fh->fd, sb, target_errno); | |
2904 | ||
2905 | if (targetdebug) | |
2906 | fprintf_unfiltered (gdb_stdlog, | |
2907 | "target_fileio_fstat (%d) = %d (%d)\n", | |
2908 | fd, ret, ret != -1 ? 0 : *target_errno); | |
1c4b552b | 2909 | return ret; |
7313baad UW |
2910 | } |
2911 | ||
12e2a5fd GB |
2912 | /* See target.h. */ |
2913 | ||
7313baad UW |
2914 | int |
2915 | target_fileio_close (int fd, int *target_errno) | |
2916 | { | |
1c4b552b GB |
2917 | fileio_fh_t *fh = fileio_fd_to_fh (fd); |
2918 | int ret = -1; | |
7313baad | 2919 | |
1c4b552b GB |
2920 | if (is_closed_fileio_fh (fh->fd)) |
2921 | *target_errno = EBADF; | |
2922 | else | |
7313baad | 2923 | { |
1c4b552b GB |
2924 | ret = fh->t->to_fileio_close (fh->t, fh->fd, target_errno); |
2925 | release_fileio_fd (fd, fh); | |
7313baad UW |
2926 | } |
2927 | ||
1c4b552b GB |
2928 | if (targetdebug) |
2929 | fprintf_unfiltered (gdb_stdlog, | |
2930 | "target_fileio_close (%d) = %d (%d)\n", | |
2931 | fd, ret, ret != -1 ? 0 : *target_errno); | |
2932 | return ret; | |
7313baad UW |
2933 | } |
2934 | ||
12e2a5fd GB |
2935 | /* See target.h. */ |
2936 | ||
7313baad | 2937 | int |
07c138c8 GB |
2938 | target_fileio_unlink (struct inferior *inf, const char *filename, |
2939 | int *target_errno) | |
7313baad UW |
2940 | { |
2941 | struct target_ops *t; | |
2942 | ||
2943 | for (t = default_fileio_target (); t != NULL; t = t->beneath) | |
2944 | { | |
2945 | if (t->to_fileio_unlink != NULL) | |
2946 | { | |
07c138c8 GB |
2947 | int ret = t->to_fileio_unlink (t, inf, filename, |
2948 | target_errno); | |
7313baad UW |
2949 | |
2950 | if (targetdebug) | |
2951 | fprintf_unfiltered (gdb_stdlog, | |
07c138c8 GB |
2952 | "target_fileio_unlink (%d,%s)" |
2953 | " = %d (%d)\n", | |
2954 | inf == NULL ? 0 : inf->num, filename, | |
2955 | ret, ret != -1 ? 0 : *target_errno); | |
7313baad UW |
2956 | return ret; |
2957 | } | |
2958 | } | |
2959 | ||
2960 | *target_errno = FILEIO_ENOSYS; | |
2961 | return -1; | |
2962 | } | |
2963 | ||
12e2a5fd GB |
2964 | /* See target.h. */ |
2965 | ||
b9e7b9c3 | 2966 | char * |
07c138c8 GB |
2967 | target_fileio_readlink (struct inferior *inf, const char *filename, |
2968 | int *target_errno) | |
b9e7b9c3 UW |
2969 | { |
2970 | struct target_ops *t; | |
2971 | ||
2972 | for (t = default_fileio_target (); t != NULL; t = t->beneath) | |
2973 | { | |
2974 | if (t->to_fileio_readlink != NULL) | |
2975 | { | |
07c138c8 GB |
2976 | char *ret = t->to_fileio_readlink (t, inf, filename, |
2977 | target_errno); | |
b9e7b9c3 UW |
2978 | |
2979 | if (targetdebug) | |
2980 | fprintf_unfiltered (gdb_stdlog, | |
07c138c8 GB |
2981 | "target_fileio_readlink (%d,%s)" |
2982 | " = %s (%d)\n", | |
2983 | inf == NULL ? 0 : inf->num, | |
b9e7b9c3 UW |
2984 | filename, ret? ret : "(nil)", |
2985 | ret? 0 : *target_errno); | |
2986 | return ret; | |
2987 | } | |
2988 | } | |
2989 | ||
2990 | *target_errno = FILEIO_ENOSYS; | |
2991 | return NULL; | |
2992 | } | |
2993 | ||
7313baad UW |
2994 | static void |
2995 | target_fileio_close_cleanup (void *opaque) | |
2996 | { | |
2997 | int fd = *(int *) opaque; | |
2998 | int target_errno; | |
2999 | ||
3000 | target_fileio_close (fd, &target_errno); | |
3001 | } | |
3002 | ||
07c138c8 GB |
3003 | /* Read target file FILENAME, in the filesystem as seen by INF. If |
3004 | INF is NULL, use the filesystem seen by the debugger (GDB or, for | |
3005 | remote targets, the remote stub). Store the result in *BUF_P and | |
3006 | return the size of the transferred data. PADDING additional bytes | |
3007 | are available in *BUF_P. This is a helper function for | |
3008 | target_fileio_read_alloc; see the declaration of that function for | |
3009 | more information. */ | |
7313baad | 3010 | |
f7af1fcd JK |
3011 | static LONGEST |
3012 | target_fileio_read_alloc_1 (struct inferior *inf, const char *filename, | |
3013 | gdb_byte **buf_p, int padding) | |
3014 | { | |
3015 | struct cleanup *close_cleanup; | |
db1ff28b JK |
3016 | size_t buf_alloc, buf_pos; |
3017 | gdb_byte *buf; | |
3018 | LONGEST n; | |
3019 | int fd; | |
3020 | int target_errno; | |
f7af1fcd | 3021 | |
db1ff28b JK |
3022 | fd = target_fileio_open (inf, filename, FILEIO_O_RDONLY, 0700, |
3023 | &target_errno); | |
f7af1fcd JK |
3024 | if (fd == -1) |
3025 | return -1; | |
3026 | ||
3027 | close_cleanup = make_cleanup (target_fileio_close_cleanup, &fd); | |
db1ff28b JK |
3028 | |
3029 | /* Start by reading up to 4K at a time. The target will throttle | |
3030 | this number down if necessary. */ | |
3031 | buf_alloc = 4096; | |
224c3ddb | 3032 | buf = (gdb_byte *) xmalloc (buf_alloc); |
db1ff28b JK |
3033 | buf_pos = 0; |
3034 | while (1) | |
3035 | { | |
3036 | n = target_fileio_pread (fd, &buf[buf_pos], | |
3037 | buf_alloc - buf_pos - padding, buf_pos, | |
3038 | &target_errno); | |
3039 | if (n < 0) | |
3040 | { | |
3041 | /* An error occurred. */ | |
3042 | do_cleanups (close_cleanup); | |
3043 | xfree (buf); | |
3044 | return -1; | |
3045 | } | |
3046 | else if (n == 0) | |
3047 | { | |
3048 | /* Read all there was. */ | |
3049 | do_cleanups (close_cleanup); | |
3050 | if (buf_pos == 0) | |
3051 | xfree (buf); | |
3052 | else | |
3053 | *buf_p = buf; | |
3054 | return buf_pos; | |
3055 | } | |
3056 | ||
3057 | buf_pos += n; | |
3058 | ||
3059 | /* If the buffer is filling up, expand it. */ | |
3060 | if (buf_alloc < buf_pos * 2) | |
3061 | { | |
3062 | buf_alloc *= 2; | |
224c3ddb | 3063 | buf = (gdb_byte *) xrealloc (buf, buf_alloc); |
db1ff28b JK |
3064 | } |
3065 | ||
3066 | QUIT; | |
3067 | } | |
f7af1fcd JK |
3068 | } |
3069 | ||
12e2a5fd | 3070 | /* See target.h. */ |
7313baad UW |
3071 | |
3072 | LONGEST | |
07c138c8 GB |
3073 | target_fileio_read_alloc (struct inferior *inf, const char *filename, |
3074 | gdb_byte **buf_p) | |
7313baad | 3075 | { |
07c138c8 | 3076 | return target_fileio_read_alloc_1 (inf, filename, buf_p, 0); |
7313baad UW |
3077 | } |
3078 | ||
db1ff28b | 3079 | /* See target.h. */ |
f7af1fcd | 3080 | |
87028b87 | 3081 | gdb::unique_xmalloc_ptr<char> |
f7af1fcd JK |
3082 | target_fileio_read_stralloc (struct inferior *inf, const char *filename) |
3083 | { | |
db1ff28b JK |
3084 | gdb_byte *buffer; |
3085 | char *bufstr; | |
3086 | LONGEST i, transferred; | |
3087 | ||
3088 | transferred = target_fileio_read_alloc_1 (inf, filename, &buffer, 1); | |
3089 | bufstr = (char *) buffer; | |
3090 | ||
3091 | if (transferred < 0) | |
87028b87 | 3092 | return gdb::unique_xmalloc_ptr<char> (nullptr); |
db1ff28b JK |
3093 | |
3094 | if (transferred == 0) | |
87028b87 | 3095 | return gdb::unique_xmalloc_ptr<char> (xstrdup ("")); |
db1ff28b JK |
3096 | |
3097 | bufstr[transferred] = 0; | |
3098 | ||
3099 | /* Check for embedded NUL bytes; but allow trailing NULs. */ | |
3100 | for (i = strlen (bufstr); i < transferred; i++) | |
3101 | if (bufstr[i] != 0) | |
3102 | { | |
3103 | warning (_("target file %s " | |
3104 | "contained unexpected null characters"), | |
3105 | filename); | |
3106 | break; | |
3107 | } | |
3108 | ||
87028b87 | 3109 | return gdb::unique_xmalloc_ptr<char> (bufstr); |
f7af1fcd | 3110 | } |
7313baad | 3111 | |
db1ff28b | 3112 | |
e0d24f8d | 3113 | static int |
31568a15 TT |
3114 | default_region_ok_for_hw_watchpoint (struct target_ops *self, |
3115 | CORE_ADDR addr, int len) | |
e0d24f8d | 3116 | { |
f5656ead | 3117 | return (len <= gdbarch_ptr_bit (target_gdbarch ()) / TARGET_CHAR_BIT); |
ccaa32c7 GS |
3118 | } |
3119 | ||
5009afc5 AS |
3120 | static int |
3121 | default_watchpoint_addr_within_range (struct target_ops *target, | |
3122 | CORE_ADDR addr, | |
3123 | CORE_ADDR start, int length) | |
3124 | { | |
3125 | return addr >= start && addr < start + length; | |
3126 | } | |
3127 | ||
c2250ad1 UW |
3128 | static struct gdbarch * |
3129 | default_thread_architecture (struct target_ops *ops, ptid_t ptid) | |
3130 | { | |
5cd63fda PA |
3131 | inferior *inf = find_inferior_ptid (ptid); |
3132 | gdb_assert (inf != NULL); | |
3133 | return inf->gdbarch; | |
c2250ad1 UW |
3134 | } |
3135 | ||
c906108c | 3136 | static int |
555bbdeb TT |
3137 | return_zero (struct target_ops *ignore) |
3138 | { | |
3139 | return 0; | |
3140 | } | |
3141 | ||
3142 | static int | |
3143 | return_zero_has_execution (struct target_ops *ignore, ptid_t ignore2) | |
c906108c SS |
3144 | { |
3145 | return 0; | |
3146 | } | |
3147 | ||
ed9a39eb JM |
3148 | /* |
3149 | * Find the next target down the stack from the specified target. | |
3150 | */ | |
3151 | ||
3152 | struct target_ops * | |
fba45db2 | 3153 | find_target_beneath (struct target_ops *t) |
ed9a39eb | 3154 | { |
258b763a | 3155 | return t->beneath; |
ed9a39eb JM |
3156 | } |
3157 | ||
8b06beed TT |
3158 | /* See target.h. */ |
3159 | ||
3160 | struct target_ops * | |
3161 | find_target_at (enum strata stratum) | |
3162 | { | |
3163 | struct target_ops *t; | |
3164 | ||
3165 | for (t = current_target.beneath; t != NULL; t = t->beneath) | |
3166 | if (t->to_stratum == stratum) | |
3167 | return t; | |
3168 | ||
3169 | return NULL; | |
3170 | } | |
3171 | ||
c906108c | 3172 | \f |
0f48b757 PA |
3173 | |
3174 | /* See target.h */ | |
3175 | ||
3176 | void | |
3177 | target_announce_detach (int from_tty) | |
3178 | { | |
3179 | pid_t pid; | |
a121b7c1 | 3180 | const char *exec_file; |
0f48b757 PA |
3181 | |
3182 | if (!from_tty) | |
3183 | return; | |
3184 | ||
3185 | exec_file = get_exec_file (0); | |
3186 | if (exec_file == NULL) | |
3187 | exec_file = ""; | |
3188 | ||
3189 | pid = ptid_get_pid (inferior_ptid); | |
3190 | printf_unfiltered (_("Detaching from program: %s, %s\n"), exec_file, | |
3191 | target_pid_to_str (pid_to_ptid (pid))); | |
3192 | gdb_flush (gdb_stdout); | |
3193 | } | |
3194 | ||
c906108c SS |
3195 | /* The inferior process has died. Long live the inferior! */ |
3196 | ||
3197 | void | |
fba45db2 | 3198 | generic_mourn_inferior (void) |
c906108c | 3199 | { |
7f9f62ba | 3200 | ptid_t ptid; |
c906108c | 3201 | |
7f9f62ba | 3202 | ptid = inferior_ptid; |
39f77062 | 3203 | inferior_ptid = null_ptid; |
7f9f62ba | 3204 | |
f59f708a PA |
3205 | /* Mark breakpoints uninserted in case something tries to delete a |
3206 | breakpoint while we delete the inferior's threads (which would | |
3207 | fail, since the inferior is long gone). */ | |
3208 | mark_breakpoints_out (); | |
3209 | ||
7f9f62ba PA |
3210 | if (!ptid_equal (ptid, null_ptid)) |
3211 | { | |
3212 | int pid = ptid_get_pid (ptid); | |
6c95b8df | 3213 | exit_inferior (pid); |
7f9f62ba PA |
3214 | } |
3215 | ||
f59f708a PA |
3216 | /* Note this wipes step-resume breakpoints, so needs to be done |
3217 | after exit_inferior, which ends up referencing the step-resume | |
3218 | breakpoints through clear_thread_inferior_resources. */ | |
c906108c | 3219 | breakpoint_init_inferior (inf_exited); |
f59f708a | 3220 | |
c906108c SS |
3221 | registers_changed (); |
3222 | ||
c906108c SS |
3223 | reopen_exec_file (); |
3224 | reinit_frame_cache (); | |
3225 | ||
9a4105ab AC |
3226 | if (deprecated_detach_hook) |
3227 | deprecated_detach_hook (); | |
c906108c SS |
3228 | } |
3229 | \f | |
fd0a2a6f MK |
3230 | /* Convert a normal process ID to a string. Returns the string in a |
3231 | static buffer. */ | |
c906108c | 3232 | |
7a114964 | 3233 | const char * |
39f77062 | 3234 | normal_pid_to_str (ptid_t ptid) |
c906108c | 3235 | { |
fd0a2a6f | 3236 | static char buf[32]; |
c906108c | 3237 | |
5fff8fc0 | 3238 | xsnprintf (buf, sizeof buf, "process %d", ptid_get_pid (ptid)); |
c906108c SS |
3239 | return buf; |
3240 | } | |
3241 | ||
7a114964 | 3242 | static const char * |
770234d3 | 3243 | default_pid_to_str (struct target_ops *ops, ptid_t ptid) |
117de6a9 PA |
3244 | { |
3245 | return normal_pid_to_str (ptid); | |
3246 | } | |
3247 | ||
9b4eba8e HZ |
3248 | /* Error-catcher for target_find_memory_regions. */ |
3249 | static int | |
2e73927c TT |
3250 | dummy_find_memory_regions (struct target_ops *self, |
3251 | find_memory_region_ftype ignore1, void *ignore2) | |
be4d1333 | 3252 | { |
9b4eba8e | 3253 | error (_("Command not implemented for this target.")); |
be4d1333 MS |
3254 | return 0; |
3255 | } | |
3256 | ||
9b4eba8e HZ |
3257 | /* Error-catcher for target_make_corefile_notes. */ |
3258 | static char * | |
fc6691b2 TT |
3259 | dummy_make_corefile_notes (struct target_ops *self, |
3260 | bfd *ignore1, int *ignore2) | |
be4d1333 | 3261 | { |
9b4eba8e | 3262 | error (_("Command not implemented for this target.")); |
be4d1333 MS |
3263 | return NULL; |
3264 | } | |
3265 | ||
c906108c SS |
3266 | /* Set up the handful of non-empty slots needed by the dummy target |
3267 | vector. */ | |
3268 | ||
3269 | static void | |
fba45db2 | 3270 | init_dummy_target (void) |
c906108c SS |
3271 | { |
3272 | dummy_target.to_shortname = "None"; | |
3273 | dummy_target.to_longname = "None"; | |
3274 | dummy_target.to_doc = ""; | |
03583c20 UW |
3275 | dummy_target.to_supports_disable_randomization |
3276 | = find_default_supports_disable_randomization; | |
c906108c | 3277 | dummy_target.to_stratum = dummy_stratum; |
555bbdeb TT |
3278 | dummy_target.to_has_all_memory = return_zero; |
3279 | dummy_target.to_has_memory = return_zero; | |
3280 | dummy_target.to_has_stack = return_zero; | |
3281 | dummy_target.to_has_registers = return_zero; | |
3282 | dummy_target.to_has_execution = return_zero_has_execution; | |
c906108c | 3283 | dummy_target.to_magic = OPS_MAGIC; |
1101cb7b TT |
3284 | |
3285 | install_dummy_methods (&dummy_target); | |
c906108c | 3286 | } |
c906108c | 3287 | \f |
c906108c | 3288 | |
f1c07ab0 | 3289 | void |
460014f5 | 3290 | target_close (struct target_ops *targ) |
f1c07ab0 | 3291 | { |
7fdc1521 TT |
3292 | gdb_assert (!target_is_pushed (targ)); |
3293 | ||
f1c07ab0 | 3294 | if (targ->to_xclose != NULL) |
460014f5 | 3295 | targ->to_xclose (targ); |
f1c07ab0 | 3296 | else if (targ->to_close != NULL) |
de90e03d | 3297 | targ->to_close (targ); |
947b8855 PA |
3298 | |
3299 | if (targetdebug) | |
460014f5 | 3300 | fprintf_unfiltered (gdb_stdlog, "target_close ()\n"); |
f1c07ab0 AC |
3301 | } |
3302 | ||
28439f5e PA |
3303 | int |
3304 | target_thread_alive (ptid_t ptid) | |
c906108c | 3305 | { |
a7068b60 | 3306 | return current_target.to_thread_alive (¤t_target, ptid); |
28439f5e PA |
3307 | } |
3308 | ||
3309 | void | |
e8032dde | 3310 | target_update_thread_list (void) |
28439f5e | 3311 | { |
e8032dde | 3312 | current_target.to_update_thread_list (¤t_target); |
c906108c SS |
3313 | } |
3314 | ||
d914c394 SS |
3315 | void |
3316 | target_stop (ptid_t ptid) | |
3317 | { | |
3318 | if (!may_stop) | |
3319 | { | |
3320 | warning (_("May not interrupt or stop the target, ignoring attempt")); | |
3321 | return; | |
3322 | } | |
3323 | ||
1eab8a48 | 3324 | (*current_target.to_stop) (¤t_target, ptid); |
d914c394 SS |
3325 | } |
3326 | ||
bfedc46a PA |
3327 | void |
3328 | target_interrupt (ptid_t ptid) | |
3329 | { | |
3330 | if (!may_stop) | |
3331 | { | |
3332 | warning (_("May not interrupt or stop the target, ignoring attempt")); | |
3333 | return; | |
3334 | } | |
3335 | ||
3336 | (*current_target.to_interrupt) (¤t_target, ptid); | |
3337 | } | |
3338 | ||
abc56d60 PA |
3339 | /* See target.h. */ |
3340 | ||
93692b58 PA |
3341 | void |
3342 | target_pass_ctrlc (void) | |
3343 | { | |
3344 | (*current_target.to_pass_ctrlc) (¤t_target); | |
3345 | } | |
3346 | ||
3347 | /* See target.h. */ | |
3348 | ||
3349 | void | |
3350 | default_target_pass_ctrlc (struct target_ops *ops) | |
3351 | { | |
3352 | target_interrupt (inferior_ptid); | |
3353 | } | |
3354 | ||
f8c1d06b GB |
3355 | /* See target/target.h. */ |
3356 | ||
3357 | void | |
03f4463b | 3358 | target_stop_and_wait (ptid_t ptid) |
f8c1d06b GB |
3359 | { |
3360 | struct target_waitstatus status; | |
3361 | int was_non_stop = non_stop; | |
3362 | ||
3363 | non_stop = 1; | |
3364 | target_stop (ptid); | |
3365 | ||
3366 | memset (&status, 0, sizeof (status)); | |
3367 | target_wait (ptid, &status, 0); | |
3368 | ||
3369 | non_stop = was_non_stop; | |
3370 | } | |
3371 | ||
3372 | /* See target/target.h. */ | |
3373 | ||
3374 | void | |
03f4463b | 3375 | target_continue_no_signal (ptid_t ptid) |
f8c1d06b GB |
3376 | { |
3377 | target_resume (ptid, 0, GDB_SIGNAL_0); | |
3378 | } | |
3379 | ||
049a8570 SDJ |
3380 | /* See target/target.h. */ |
3381 | ||
3382 | void | |
3383 | target_continue (ptid_t ptid, enum gdb_signal signal) | |
3384 | { | |
3385 | target_resume (ptid, 0, signal); | |
3386 | } | |
3387 | ||
09826ec5 PA |
3388 | /* Concatenate ELEM to LIST, a comma separate list, and return the |
3389 | result. The LIST incoming argument is released. */ | |
3390 | ||
3391 | static char * | |
3392 | str_comma_list_concat_elem (char *list, const char *elem) | |
3393 | { | |
3394 | if (list == NULL) | |
3395 | return xstrdup (elem); | |
3396 | else | |
3397 | return reconcat (list, list, ", ", elem, (char *) NULL); | |
3398 | } | |
3399 | ||
3400 | /* Helper for target_options_to_string. If OPT is present in | |
3401 | TARGET_OPTIONS, append the OPT_STR (string version of OPT) in RET. | |
3402 | Returns the new resulting string. OPT is removed from | |
3403 | TARGET_OPTIONS. */ | |
3404 | ||
3405 | static char * | |
3406 | do_option (int *target_options, char *ret, | |
a121b7c1 | 3407 | int opt, const char *opt_str) |
09826ec5 PA |
3408 | { |
3409 | if ((*target_options & opt) != 0) | |
3410 | { | |
3411 | ret = str_comma_list_concat_elem (ret, opt_str); | |
3412 | *target_options &= ~opt; | |
3413 | } | |
3414 | ||
3415 | return ret; | |
3416 | } | |
3417 | ||
3418 | char * | |
3419 | target_options_to_string (int target_options) | |
3420 | { | |
3421 | char *ret = NULL; | |
3422 | ||
3423 | #define DO_TARG_OPTION(OPT) \ | |
3424 | ret = do_option (&target_options, ret, OPT, #OPT) | |
3425 | ||
3426 | DO_TARG_OPTION (TARGET_WNOHANG); | |
3427 | ||
3428 | if (target_options != 0) | |
3429 | ret = str_comma_list_concat_elem (ret, "unknown???"); | |
3430 | ||
3431 | if (ret == NULL) | |
3432 | ret = xstrdup (""); | |
3433 | return ret; | |
3434 | } | |
3435 | ||
28439f5e PA |
3436 | void |
3437 | target_fetch_registers (struct regcache *regcache, int regno) | |
c906108c | 3438 | { |
ad5989bd TT |
3439 | current_target.to_fetch_registers (¤t_target, regcache, regno); |
3440 | if (targetdebug) | |
ef79d9a3 | 3441 | regcache->debug_print_register ("target_fetch_registers", regno); |
c906108c SS |
3442 | } |
3443 | ||
28439f5e PA |
3444 | void |
3445 | target_store_registers (struct regcache *regcache, int regno) | |
c906108c | 3446 | { |
d914c394 SS |
3447 | if (!may_write_registers) |
3448 | error (_("Writing to registers is not allowed (regno %d)"), regno); | |
3449 | ||
6b84065d TT |
3450 | current_target.to_store_registers (¤t_target, regcache, regno); |
3451 | if (targetdebug) | |
28439f5e | 3452 | { |
ef79d9a3 | 3453 | regcache->debug_print_register ("target_store_registers", regno); |
28439f5e | 3454 | } |
c906108c SS |
3455 | } |
3456 | ||
dc146f7c VP |
3457 | int |
3458 | target_core_of_thread (ptid_t ptid) | |
3459 | { | |
a7068b60 | 3460 | return current_target.to_core_of_thread (¤t_target, ptid); |
dc146f7c VP |
3461 | } |
3462 | ||
936d2992 PA |
3463 | int |
3464 | simple_verify_memory (struct target_ops *ops, | |
3465 | const gdb_byte *data, CORE_ADDR lma, ULONGEST size) | |
3466 | { | |
3467 | LONGEST total_xfered = 0; | |
3468 | ||
3469 | while (total_xfered < size) | |
3470 | { | |
3471 | ULONGEST xfered_len; | |
3472 | enum target_xfer_status status; | |
3473 | gdb_byte buf[1024]; | |
768adc05 | 3474 | ULONGEST howmuch = std::min<ULONGEST> (sizeof (buf), size - total_xfered); |
936d2992 PA |
3475 | |
3476 | status = target_xfer_partial (ops, TARGET_OBJECT_MEMORY, NULL, | |
3477 | buf, NULL, lma + total_xfered, howmuch, | |
3478 | &xfered_len); | |
3479 | if (status == TARGET_XFER_OK | |
3480 | && memcmp (data + total_xfered, buf, xfered_len) == 0) | |
3481 | { | |
3482 | total_xfered += xfered_len; | |
3483 | QUIT; | |
3484 | } | |
3485 | else | |
3486 | return 0; | |
3487 | } | |
3488 | return 1; | |
3489 | } | |
3490 | ||
3491 | /* Default implementation of memory verification. */ | |
3492 | ||
3493 | static int | |
3494 | default_verify_memory (struct target_ops *self, | |
3495 | const gdb_byte *data, CORE_ADDR memaddr, ULONGEST size) | |
3496 | { | |
3497 | /* Start over from the top of the target stack. */ | |
3498 | return simple_verify_memory (current_target.beneath, | |
3499 | data, memaddr, size); | |
3500 | } | |
3501 | ||
4a5e7a5b PA |
3502 | int |
3503 | target_verify_memory (const gdb_byte *data, CORE_ADDR memaddr, ULONGEST size) | |
3504 | { | |
a7068b60 TT |
3505 | return current_target.to_verify_memory (¤t_target, |
3506 | data, memaddr, size); | |
4a5e7a5b PA |
3507 | } |
3508 | ||
9c06b0b4 TJB |
3509 | /* The documentation for this function is in its prototype declaration in |
3510 | target.h. */ | |
3511 | ||
3512 | int | |
f4b0a671 SM |
3513 | target_insert_mask_watchpoint (CORE_ADDR addr, CORE_ADDR mask, |
3514 | enum target_hw_bp_type rw) | |
9c06b0b4 | 3515 | { |
a7068b60 TT |
3516 | return current_target.to_insert_mask_watchpoint (¤t_target, |
3517 | addr, mask, rw); | |
9c06b0b4 TJB |
3518 | } |
3519 | ||
3520 | /* The documentation for this function is in its prototype declaration in | |
3521 | target.h. */ | |
3522 | ||
3523 | int | |
f4b0a671 SM |
3524 | target_remove_mask_watchpoint (CORE_ADDR addr, CORE_ADDR mask, |
3525 | enum target_hw_bp_type rw) | |
9c06b0b4 | 3526 | { |
a7068b60 TT |
3527 | return current_target.to_remove_mask_watchpoint (¤t_target, |
3528 | addr, mask, rw); | |
9c06b0b4 TJB |
3529 | } |
3530 | ||
3531 | /* The documentation for this function is in its prototype declaration | |
3532 | in target.h. */ | |
3533 | ||
3534 | int | |
3535 | target_masked_watch_num_registers (CORE_ADDR addr, CORE_ADDR mask) | |
3536 | { | |
6c7e5e5c TT |
3537 | return current_target.to_masked_watch_num_registers (¤t_target, |
3538 | addr, mask); | |
9c06b0b4 TJB |
3539 | } |
3540 | ||
f1310107 TJB |
3541 | /* The documentation for this function is in its prototype declaration |
3542 | in target.h. */ | |
3543 | ||
3544 | int | |
3545 | target_ranged_break_num_registers (void) | |
3546 | { | |
a134316b | 3547 | return current_target.to_ranged_break_num_registers (¤t_target); |
f1310107 TJB |
3548 | } |
3549 | ||
02d27625 MM |
3550 | /* See target.h. */ |
3551 | ||
043c3577 MM |
3552 | int |
3553 | target_supports_btrace (enum btrace_format format) | |
3554 | { | |
3555 | return current_target.to_supports_btrace (¤t_target, format); | |
3556 | } | |
3557 | ||
3558 | /* See target.h. */ | |
3559 | ||
02d27625 | 3560 | struct btrace_target_info * |
f4abbc16 | 3561 | target_enable_btrace (ptid_t ptid, const struct btrace_config *conf) |
02d27625 | 3562 | { |
f4abbc16 | 3563 | return current_target.to_enable_btrace (¤t_target, ptid, conf); |
02d27625 MM |
3564 | } |
3565 | ||
3566 | /* See target.h. */ | |
3567 | ||
3568 | void | |
3569 | target_disable_btrace (struct btrace_target_info *btinfo) | |
3570 | { | |
8dc292d3 | 3571 | current_target.to_disable_btrace (¤t_target, btinfo); |
02d27625 MM |
3572 | } |
3573 | ||
3574 | /* See target.h. */ | |
3575 | ||
3576 | void | |
3577 | target_teardown_btrace (struct btrace_target_info *btinfo) | |
3578 | { | |
9ace480d | 3579 | current_target.to_teardown_btrace (¤t_target, btinfo); |
02d27625 MM |
3580 | } |
3581 | ||
3582 | /* See target.h. */ | |
3583 | ||
969c39fb | 3584 | enum btrace_error |
734b0e4b | 3585 | target_read_btrace (struct btrace_data *btrace, |
969c39fb | 3586 | struct btrace_target_info *btinfo, |
02d27625 MM |
3587 | enum btrace_read_type type) |
3588 | { | |
eb5b20d4 | 3589 | return current_target.to_read_btrace (¤t_target, btrace, btinfo, type); |
02d27625 MM |
3590 | } |
3591 | ||
d02ed0bb MM |
3592 | /* See target.h. */ |
3593 | ||
f4abbc16 MM |
3594 | const struct btrace_config * |
3595 | target_btrace_conf (const struct btrace_target_info *btinfo) | |
3596 | { | |
3597 | return current_target.to_btrace_conf (¤t_target, btinfo); | |
3598 | } | |
3599 | ||
3600 | /* See target.h. */ | |
3601 | ||
7c1687a9 MM |
3602 | void |
3603 | target_stop_recording (void) | |
3604 | { | |
ee97f592 | 3605 | current_target.to_stop_recording (¤t_target); |
7c1687a9 MM |
3606 | } |
3607 | ||
3608 | /* See target.h. */ | |
3609 | ||
d02ed0bb | 3610 | void |
85e1311a | 3611 | target_save_record (const char *filename) |
d02ed0bb | 3612 | { |
f09e2107 | 3613 | current_target.to_save_record (¤t_target, filename); |
d02ed0bb MM |
3614 | } |
3615 | ||
3616 | /* See target.h. */ | |
3617 | ||
3618 | int | |
3619 | target_supports_delete_record (void) | |
3620 | { | |
3621 | struct target_ops *t; | |
3622 | ||
3623 | for (t = current_target.beneath; t != NULL; t = t->beneath) | |
b0ed115f TT |
3624 | if (t->to_delete_record != delegate_delete_record |
3625 | && t->to_delete_record != tdefault_delete_record) | |
d02ed0bb MM |
3626 | return 1; |
3627 | ||
3628 | return 0; | |
3629 | } | |
3630 | ||
3631 | /* See target.h. */ | |
3632 | ||
3633 | void | |
3634 | target_delete_record (void) | |
3635 | { | |
07366925 | 3636 | current_target.to_delete_record (¤t_target); |
d02ed0bb MM |
3637 | } |
3638 | ||
3639 | /* See target.h. */ | |
3640 | ||
b158a20f TW |
3641 | enum record_method |
3642 | target_record_method (ptid_t ptid) | |
3643 | { | |
3644 | return current_target.to_record_method (¤t_target, ptid); | |
3645 | } | |
3646 | ||
3647 | /* See target.h. */ | |
3648 | ||
d02ed0bb | 3649 | int |
a52eab48 | 3650 | target_record_is_replaying (ptid_t ptid) |
d02ed0bb | 3651 | { |
a52eab48 | 3652 | return current_target.to_record_is_replaying (¤t_target, ptid); |
d02ed0bb MM |
3653 | } |
3654 | ||
3655 | /* See target.h. */ | |
3656 | ||
7ff27e9b MM |
3657 | int |
3658 | target_record_will_replay (ptid_t ptid, int dir) | |
3659 | { | |
3660 | return current_target.to_record_will_replay (¤t_target, ptid, dir); | |
3661 | } | |
3662 | ||
3663 | /* See target.h. */ | |
3664 | ||
797094dd MM |
3665 | void |
3666 | target_record_stop_replaying (void) | |
3667 | { | |
3668 | current_target.to_record_stop_replaying (¤t_target); | |
3669 | } | |
3670 | ||
3671 | /* See target.h. */ | |
3672 | ||
d02ed0bb MM |
3673 | void |
3674 | target_goto_record_begin (void) | |
3675 | { | |
671e76cc | 3676 | current_target.to_goto_record_begin (¤t_target); |
d02ed0bb MM |
3677 | } |
3678 | ||
3679 | /* See target.h. */ | |
3680 | ||
3681 | void | |
3682 | target_goto_record_end (void) | |
3683 | { | |
e9179bb3 | 3684 | current_target.to_goto_record_end (¤t_target); |
d02ed0bb MM |
3685 | } |
3686 | ||
3687 | /* See target.h. */ | |
3688 | ||
3689 | void | |
3690 | target_goto_record (ULONGEST insn) | |
3691 | { | |
05969c84 | 3692 | current_target.to_goto_record (¤t_target, insn); |
d02ed0bb MM |
3693 | } |
3694 | ||
67c86d06 MM |
3695 | /* See target.h. */ |
3696 | ||
3697 | void | |
9a24775b | 3698 | target_insn_history (int size, gdb_disassembly_flags flags) |
67c86d06 | 3699 | { |
3679abfa | 3700 | current_target.to_insn_history (¤t_target, size, flags); |
67c86d06 MM |
3701 | } |
3702 | ||
3703 | /* See target.h. */ | |
3704 | ||
3705 | void | |
9a24775b PA |
3706 | target_insn_history_from (ULONGEST from, int size, |
3707 | gdb_disassembly_flags flags) | |
67c86d06 | 3708 | { |
8444ab58 | 3709 | current_target.to_insn_history_from (¤t_target, from, size, flags); |
67c86d06 MM |
3710 | } |
3711 | ||
3712 | /* See target.h. */ | |
3713 | ||
3714 | void | |
9a24775b PA |
3715 | target_insn_history_range (ULONGEST begin, ULONGEST end, |
3716 | gdb_disassembly_flags flags) | |
67c86d06 | 3717 | { |
c29302cc | 3718 | current_target.to_insn_history_range (¤t_target, begin, end, flags); |
67c86d06 MM |
3719 | } |
3720 | ||
15984c13 MM |
3721 | /* See target.h. */ |
3722 | ||
3723 | void | |
3724 | target_call_history (int size, int flags) | |
3725 | { | |
170049d4 | 3726 | current_target.to_call_history (¤t_target, size, flags); |
15984c13 MM |
3727 | } |
3728 | ||
3729 | /* See target.h. */ | |
3730 | ||
3731 | void | |
3732 | target_call_history_from (ULONGEST begin, int size, int flags) | |
3733 | { | |
16fc27d6 | 3734 | current_target.to_call_history_from (¤t_target, begin, size, flags); |
15984c13 MM |
3735 | } |
3736 | ||
3737 | /* See target.h. */ | |
3738 | ||
3739 | void | |
3740 | target_call_history_range (ULONGEST begin, ULONGEST end, int flags) | |
3741 | { | |
115d9817 | 3742 | current_target.to_call_history_range (¤t_target, begin, end, flags); |
15984c13 MM |
3743 | } |
3744 | ||
ea001bdc MM |
3745 | /* See target.h. */ |
3746 | ||
3747 | const struct frame_unwind * | |
3748 | target_get_unwinder (void) | |
3749 | { | |
ac01945b | 3750 | return current_target.to_get_unwinder (¤t_target); |
ea001bdc MM |
3751 | } |
3752 | ||
3753 | /* See target.h. */ | |
3754 | ||
3755 | const struct frame_unwind * | |
3756 | target_get_tailcall_unwinder (void) | |
3757 | { | |
ac01945b | 3758 | return current_target.to_get_tailcall_unwinder (¤t_target); |
ea001bdc MM |
3759 | } |
3760 | ||
5fff78c4 MM |
3761 | /* See target.h. */ |
3762 | ||
3763 | void | |
3764 | target_prepare_to_generate_core (void) | |
3765 | { | |
3766 | current_target.to_prepare_to_generate_core (¤t_target); | |
3767 | } | |
3768 | ||
3769 | /* See target.h. */ | |
3770 | ||
3771 | void | |
3772 | target_done_generating_core (void) | |
3773 | { | |
3774 | current_target.to_done_generating_core (¤t_target); | |
3775 | } | |
3776 | ||
c906108c | 3777 | static void |
fba45db2 | 3778 | setup_target_debug (void) |
c906108c SS |
3779 | { |
3780 | memcpy (&debug_target, ¤t_target, sizeof debug_target); | |
3781 | ||
a7068b60 | 3782 | init_debug_target (¤t_target); |
c906108c | 3783 | } |
c906108c | 3784 | \f |
c5aa993b JM |
3785 | |
3786 | static char targ_desc[] = | |
3e43a32a MS |
3787 | "Names of targets and files being debugged.\nShows the entire \ |
3788 | stack of targets currently in use (including the exec-file,\n\ | |
c906108c SS |
3789 | core-file, and process, if any), as well as the symbol file name."; |
3790 | ||
a53f3625 | 3791 | static void |
a30bf1f1 TT |
3792 | default_rcmd (struct target_ops *self, const char *command, |
3793 | struct ui_file *output) | |
a53f3625 TT |
3794 | { |
3795 | error (_("\"monitor\" command not supported by this target.")); | |
3796 | } | |
3797 | ||
96baa820 | 3798 | static void |
0b39b52e | 3799 | do_monitor_command (const char *cmd, int from_tty) |
96baa820 | 3800 | { |
96baa820 JM |
3801 | target_rcmd (cmd, gdb_stdtarg); |
3802 | } | |
3803 | ||
78cbbba8 LM |
3804 | /* Erases all the memory regions marked as flash. CMD and FROM_TTY are |
3805 | ignored. */ | |
3806 | ||
3807 | void | |
0b39b52e | 3808 | flash_erase_command (const char *cmd, int from_tty) |
78cbbba8 LM |
3809 | { |
3810 | /* Used to communicate termination of flash operations to the target. */ | |
3811 | bool found_flash_region = false; | |
78cbbba8 LM |
3812 | struct gdbarch *gdbarch = target_gdbarch (); |
3813 | ||
a664f67e | 3814 | std::vector<mem_region> mem_regions = target_memory_map (); |
78cbbba8 LM |
3815 | |
3816 | /* Iterate over all memory regions. */ | |
a664f67e | 3817 | for (const mem_region &m : mem_regions) |
78cbbba8 | 3818 | { |
78cbbba8 | 3819 | /* Is this a flash memory region? */ |
a664f67e | 3820 | if (m.attrib.mode == MEM_FLASH) |
78cbbba8 LM |
3821 | { |
3822 | found_flash_region = true; | |
a664f67e | 3823 | target_flash_erase (m.lo, m.hi - m.lo); |
78cbbba8 | 3824 | |
76f9c9cf | 3825 | ui_out_emit_tuple tuple_emitter (current_uiout, "erased-regions"); |
78cbbba8 LM |
3826 | |
3827 | current_uiout->message (_("Erasing flash memory region at address ")); | |
a664f67e | 3828 | current_uiout->field_fmt ("address", "%s", paddress (gdbarch, m.lo)); |
78cbbba8 | 3829 | current_uiout->message (", size = "); |
a664f67e | 3830 | current_uiout->field_fmt ("size", "%s", hex_string (m.hi - m.lo)); |
78cbbba8 | 3831 | current_uiout->message ("\n"); |
78cbbba8 LM |
3832 | } |
3833 | } | |
3834 | ||
3835 | /* Did we do any flash operations? If so, we need to finalize them. */ | |
3836 | if (found_flash_region) | |
3837 | target_flash_done (); | |
3838 | else | |
3839 | current_uiout->message (_("No flash memory regions found.\n")); | |
3840 | } | |
3841 | ||
87680a14 JB |
3842 | /* Print the name of each layers of our target stack. */ |
3843 | ||
3844 | static void | |
d3cb6b99 | 3845 | maintenance_print_target_stack (const char *cmd, int from_tty) |
87680a14 JB |
3846 | { |
3847 | struct target_ops *t; | |
3848 | ||
3849 | printf_filtered (_("The current target stack is:\n")); | |
3850 | ||
3851 | for (t = target_stack; t != NULL; t = t->beneath) | |
3852 | { | |
3853 | printf_filtered (" - %s (%s)\n", t->to_shortname, t->to_longname); | |
3854 | } | |
3855 | } | |
3856 | ||
372316f1 PA |
3857 | /* See target.h. */ |
3858 | ||
3859 | void | |
3860 | target_async (int enable) | |
3861 | { | |
3862 | infrun_async (enable); | |
3863 | current_target.to_async (¤t_target, enable); | |
3864 | } | |
3865 | ||
65706a29 PA |
3866 | /* See target.h. */ |
3867 | ||
3868 | void | |
3869 | target_thread_events (int enable) | |
3870 | { | |
3871 | current_target.to_thread_events (¤t_target, enable); | |
3872 | } | |
3873 | ||
329ea579 PA |
3874 | /* Controls if targets can report that they can/are async. This is |
3875 | just for maintainers to use when debugging gdb. */ | |
3876 | int target_async_permitted = 1; | |
c6ebd6cf VP |
3877 | |
3878 | /* The set command writes to this variable. If the inferior is | |
b5419e49 | 3879 | executing, target_async_permitted is *not* updated. */ |
329ea579 | 3880 | static int target_async_permitted_1 = 1; |
c6ebd6cf VP |
3881 | |
3882 | static void | |
eb4c3f4a | 3883 | maint_set_target_async_command (const char *args, int from_tty, |
329ea579 | 3884 | struct cmd_list_element *c) |
c6ebd6cf | 3885 | { |
c35b1492 | 3886 | if (have_live_inferiors ()) |
c6ebd6cf VP |
3887 | { |
3888 | target_async_permitted_1 = target_async_permitted; | |
3889 | error (_("Cannot change this setting while the inferior is running.")); | |
3890 | } | |
3891 | ||
3892 | target_async_permitted = target_async_permitted_1; | |
3893 | } | |
3894 | ||
3895 | static void | |
329ea579 PA |
3896 | maint_show_target_async_command (struct ui_file *file, int from_tty, |
3897 | struct cmd_list_element *c, | |
3898 | const char *value) | |
c6ebd6cf | 3899 | { |
3e43a32a MS |
3900 | fprintf_filtered (file, |
3901 | _("Controlling the inferior in " | |
3902 | "asynchronous mode is %s.\n"), value); | |
c6ebd6cf VP |
3903 | } |
3904 | ||
fbea99ea PA |
3905 | /* Return true if the target operates in non-stop mode even with "set |
3906 | non-stop off". */ | |
3907 | ||
3908 | static int | |
3909 | target_always_non_stop_p (void) | |
3910 | { | |
3911 | return current_target.to_always_non_stop_p (¤t_target); | |
3912 | } | |
3913 | ||
3914 | /* See target.h. */ | |
3915 | ||
3916 | int | |
3917 | target_is_non_stop_p (void) | |
3918 | { | |
3919 | return (non_stop | |
3920 | || target_non_stop_enabled == AUTO_BOOLEAN_TRUE | |
3921 | || (target_non_stop_enabled == AUTO_BOOLEAN_AUTO | |
3922 | && target_always_non_stop_p ())); | |
3923 | } | |
3924 | ||
3925 | /* Controls if targets can report that they always run in non-stop | |
3926 | mode. This is just for maintainers to use when debugging gdb. */ | |
3927 | enum auto_boolean target_non_stop_enabled = AUTO_BOOLEAN_AUTO; | |
3928 | ||
3929 | /* The set command writes to this variable. If the inferior is | |
3930 | executing, target_non_stop_enabled is *not* updated. */ | |
3931 | static enum auto_boolean target_non_stop_enabled_1 = AUTO_BOOLEAN_AUTO; | |
3932 | ||
3933 | /* Implementation of "maint set target-non-stop". */ | |
3934 | ||
3935 | static void | |
eb4c3f4a | 3936 | maint_set_target_non_stop_command (const char *args, int from_tty, |
fbea99ea PA |
3937 | struct cmd_list_element *c) |
3938 | { | |
3939 | if (have_live_inferiors ()) | |
3940 | { | |
3941 | target_non_stop_enabled_1 = target_non_stop_enabled; | |
3942 | error (_("Cannot change this setting while the inferior is running.")); | |
3943 | } | |
3944 | ||
3945 | target_non_stop_enabled = target_non_stop_enabled_1; | |
3946 | } | |
3947 | ||
3948 | /* Implementation of "maint show target-non-stop". */ | |
3949 | ||
3950 | static void | |
3951 | maint_show_target_non_stop_command (struct ui_file *file, int from_tty, | |
3952 | struct cmd_list_element *c, | |
3953 | const char *value) | |
3954 | { | |
3955 | if (target_non_stop_enabled == AUTO_BOOLEAN_AUTO) | |
3956 | fprintf_filtered (file, | |
3957 | _("Whether the target is always in non-stop mode " | |
3958 | "is %s (currently %s).\n"), value, | |
3959 | target_always_non_stop_p () ? "on" : "off"); | |
3960 | else | |
3961 | fprintf_filtered (file, | |
3962 | _("Whether the target is always in non-stop mode " | |
3963 | "is %s.\n"), value); | |
3964 | } | |
3965 | ||
d914c394 SS |
3966 | /* Temporary copies of permission settings. */ |
3967 | ||
3968 | static int may_write_registers_1 = 1; | |
3969 | static int may_write_memory_1 = 1; | |
3970 | static int may_insert_breakpoints_1 = 1; | |
3971 | static int may_insert_tracepoints_1 = 1; | |
3972 | static int may_insert_fast_tracepoints_1 = 1; | |
3973 | static int may_stop_1 = 1; | |
3974 | ||
3975 | /* Make the user-set values match the real values again. */ | |
3976 | ||
3977 | void | |
3978 | update_target_permissions (void) | |
3979 | { | |
3980 | may_write_registers_1 = may_write_registers; | |
3981 | may_write_memory_1 = may_write_memory; | |
3982 | may_insert_breakpoints_1 = may_insert_breakpoints; | |
3983 | may_insert_tracepoints_1 = may_insert_tracepoints; | |
3984 | may_insert_fast_tracepoints_1 = may_insert_fast_tracepoints; | |
3985 | may_stop_1 = may_stop; | |
3986 | } | |
3987 | ||
3988 | /* The one function handles (most of) the permission flags in the same | |
3989 | way. */ | |
3990 | ||
3991 | static void | |
eb4c3f4a | 3992 | set_target_permissions (const char *args, int from_tty, |
d914c394 SS |
3993 | struct cmd_list_element *c) |
3994 | { | |
3995 | if (target_has_execution) | |
3996 | { | |
3997 | update_target_permissions (); | |
3998 | error (_("Cannot change this setting while the inferior is running.")); | |
3999 | } | |
4000 | ||
4001 | /* Make the real values match the user-changed values. */ | |
4002 | may_write_registers = may_write_registers_1; | |
4003 | may_insert_breakpoints = may_insert_breakpoints_1; | |
4004 | may_insert_tracepoints = may_insert_tracepoints_1; | |
4005 | may_insert_fast_tracepoints = may_insert_fast_tracepoints_1; | |
4006 | may_stop = may_stop_1; | |
4007 | update_observer_mode (); | |
4008 | } | |
4009 | ||
4010 | /* Set memory write permission independently of observer mode. */ | |
4011 | ||
4012 | static void | |
eb4c3f4a | 4013 | set_write_memory_permission (const char *args, int from_tty, |
d914c394 SS |
4014 | struct cmd_list_element *c) |
4015 | { | |
4016 | /* Make the real values match the user-changed values. */ | |
4017 | may_write_memory = may_write_memory_1; | |
4018 | update_observer_mode (); | |
4019 | } | |
4020 | ||
4021 | ||
c906108c | 4022 | void |
fba45db2 | 4023 | initialize_targets (void) |
c906108c SS |
4024 | { |
4025 | init_dummy_target (); | |
4026 | push_target (&dummy_target); | |
4027 | ||
11db9430 SM |
4028 | add_info ("target", info_target_command, targ_desc); |
4029 | add_info ("files", info_target_command, targ_desc); | |
c906108c | 4030 | |
ccce17b0 | 4031 | add_setshow_zuinteger_cmd ("target", class_maintenance, &targetdebug, _("\ |
85c07804 AC |
4032 | Set target debugging."), _("\ |
4033 | Show target debugging."), _("\ | |
333dabeb | 4034 | When non-zero, target debugging is enabled. Higher numbers are more\n\ |
3cecbbbe TT |
4035 | verbose."), |
4036 | set_targetdebug, | |
ccce17b0 YQ |
4037 | show_targetdebug, |
4038 | &setdebuglist, &showdebuglist); | |
3a11626d | 4039 | |
2bc416ba | 4040 | add_setshow_boolean_cmd ("trust-readonly-sections", class_support, |
7915a72c AC |
4041 | &trust_readonly, _("\ |
4042 | Set mode for reading from readonly sections."), _("\ | |
4043 | Show mode for reading from readonly sections."), _("\ | |
3a11626d MS |
4044 | When this mode is on, memory reads from readonly sections (such as .text)\n\ |
4045 | will be read from the object file instead of from the target. This will\n\ | |
7915a72c | 4046 | result in significant performance improvement for remote targets."), |
2c5b56ce | 4047 | NULL, |
920d2a44 | 4048 | show_trust_readonly, |
e707bbc2 | 4049 | &setlist, &showlist); |
96baa820 JM |
4050 | |
4051 | add_com ("monitor", class_obscure, do_monitor_command, | |
1bedd215 | 4052 | _("Send a command to the remote monitor (remote targets only).")); |
96baa820 | 4053 | |
87680a14 JB |
4054 | add_cmd ("target-stack", class_maintenance, maintenance_print_target_stack, |
4055 | _("Print the name of each layer of the internal target stack."), | |
4056 | &maintenanceprintlist); | |
4057 | ||
c6ebd6cf VP |
4058 | add_setshow_boolean_cmd ("target-async", no_class, |
4059 | &target_async_permitted_1, _("\ | |
4060 | Set whether gdb controls the inferior in asynchronous mode."), _("\ | |
4061 | Show whether gdb controls the inferior in asynchronous mode."), _("\ | |
4062 | Tells gdb whether to control the inferior in asynchronous mode."), | |
329ea579 PA |
4063 | maint_set_target_async_command, |
4064 | maint_show_target_async_command, | |
4065 | &maintenance_set_cmdlist, | |
4066 | &maintenance_show_cmdlist); | |
c6ebd6cf | 4067 | |
fbea99ea PA |
4068 | add_setshow_auto_boolean_cmd ("target-non-stop", no_class, |
4069 | &target_non_stop_enabled_1, _("\ | |
4070 | Set whether gdb always controls the inferior in non-stop mode."), _("\ | |
4071 | Show whether gdb always controls the inferior in non-stop mode."), _("\ | |
4072 | Tells gdb whether to control the inferior in non-stop mode."), | |
4073 | maint_set_target_non_stop_command, | |
4074 | maint_show_target_non_stop_command, | |
4075 | &maintenance_set_cmdlist, | |
4076 | &maintenance_show_cmdlist); | |
4077 | ||
d914c394 SS |
4078 | add_setshow_boolean_cmd ("may-write-registers", class_support, |
4079 | &may_write_registers_1, _("\ | |
4080 | Set permission to write into registers."), _("\ | |
4081 | Show permission to write into registers."), _("\ | |
4082 | When this permission is on, GDB may write into the target's registers.\n\ | |
4083 | Otherwise, any sort of write attempt will result in an error."), | |
4084 | set_target_permissions, NULL, | |
4085 | &setlist, &showlist); | |
4086 | ||
4087 | add_setshow_boolean_cmd ("may-write-memory", class_support, | |
4088 | &may_write_memory_1, _("\ | |
4089 | Set permission to write into target memory."), _("\ | |
4090 | Show permission to write into target memory."), _("\ | |
4091 | When this permission is on, GDB may write into the target's memory.\n\ | |
4092 | Otherwise, any sort of write attempt will result in an error."), | |
4093 | set_write_memory_permission, NULL, | |
4094 | &setlist, &showlist); | |
4095 | ||
4096 | add_setshow_boolean_cmd ("may-insert-breakpoints", class_support, | |
4097 | &may_insert_breakpoints_1, _("\ | |
4098 | Set permission to insert breakpoints in the target."), _("\ | |
4099 | Show permission to insert breakpoints in the target."), _("\ | |
4100 | When this permission is on, GDB may insert breakpoints in the program.\n\ | |
4101 | Otherwise, any sort of insertion attempt will result in an error."), | |
4102 | set_target_permissions, NULL, | |
4103 | &setlist, &showlist); | |
4104 | ||
4105 | add_setshow_boolean_cmd ("may-insert-tracepoints", class_support, | |
4106 | &may_insert_tracepoints_1, _("\ | |
4107 | Set permission to insert tracepoints in the target."), _("\ | |
4108 | Show permission to insert tracepoints in the target."), _("\ | |
4109 | When this permission is on, GDB may insert tracepoints in the program.\n\ | |
4110 | Otherwise, any sort of insertion attempt will result in an error."), | |
4111 | set_target_permissions, NULL, | |
4112 | &setlist, &showlist); | |
4113 | ||
4114 | add_setshow_boolean_cmd ("may-insert-fast-tracepoints", class_support, | |
4115 | &may_insert_fast_tracepoints_1, _("\ | |
4116 | Set permission to insert fast tracepoints in the target."), _("\ | |
4117 | Show permission to insert fast tracepoints in the target."), _("\ | |
4118 | When this permission is on, GDB may insert fast tracepoints.\n\ | |
4119 | Otherwise, any sort of insertion attempt will result in an error."), | |
4120 | set_target_permissions, NULL, | |
4121 | &setlist, &showlist); | |
4122 | ||
4123 | add_setshow_boolean_cmd ("may-interrupt", class_support, | |
4124 | &may_stop_1, _("\ | |
4125 | Set permission to interrupt or signal the target."), _("\ | |
4126 | Show permission to interrupt or signal the target."), _("\ | |
4127 | When this permission is on, GDB may interrupt/stop the target's execution.\n\ | |
4128 | Otherwise, any attempt to interrupt or stop will be ignored."), | |
4129 | set_target_permissions, NULL, | |
4130 | &setlist, &showlist); | |
6a3cb8e8 | 4131 | |
78cbbba8 LM |
4132 | add_com ("flash-erase", no_class, flash_erase_command, |
4133 | _("Erase all flash memory regions.")); | |
4134 | ||
6a3cb8e8 PA |
4135 | add_setshow_boolean_cmd ("auto-connect-native-target", class_support, |
4136 | &auto_connect_native_target, _("\ | |
4137 | Set whether GDB may automatically connect to the native target."), _("\ | |
4138 | Show whether GDB may automatically connect to the native target."), _("\ | |
4139 | When on, and GDB is not connected to a target yet, GDB\n\ | |
4140 | attempts \"run\" and other commands with the native target."), | |
4141 | NULL, show_auto_connect_native_target, | |
4142 | &setlist, &showlist); | |
c906108c | 4143 | } |