Commit | Line | Data |
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c906108c | 1 | /* Select target systems and architectures at runtime for GDB. |
7998dfc3 | 2 | |
e2882c85 | 3 | Copyright (C) 1990-2018 Free Software Foundation, Inc. |
7998dfc3 | 4 | |
c906108c SS |
5 | Contributed by Cygnus Support. |
6 | ||
c5aa993b | 7 | This file is part of GDB. |
c906108c | 8 | |
c5aa993b JM |
9 | This program is free software; you can redistribute it and/or modify |
10 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 11 | the Free Software Foundation; either version 3 of the License, or |
c5aa993b | 12 | (at your option) any later version. |
c906108c | 13 | |
c5aa993b JM |
14 | This program is distributed in the hope that it will be useful, |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
c906108c | 18 | |
c5aa993b | 19 | You should have received a copy of the GNU General Public License |
a9762ec7 | 20 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c SS |
21 | |
22 | #include "defs.h" | |
c906108c | 23 | #include "target.h" |
68c765e2 | 24 | #include "target-dcache.h" |
c906108c SS |
25 | #include "gdbcmd.h" |
26 | #include "symtab.h" | |
27 | #include "inferior.h" | |
45741a9c | 28 | #include "infrun.h" |
c906108c SS |
29 | #include "bfd.h" |
30 | #include "symfile.h" | |
31 | #include "objfiles.h" | |
4930751a | 32 | #include "dcache.h" |
c906108c | 33 | #include <signal.h> |
4e052eda | 34 | #include "regcache.h" |
b6591e8b | 35 | #include "gdbcore.h" |
424163ea | 36 | #include "target-descriptions.h" |
e1ac3328 | 37 | #include "gdbthread.h" |
b9db4ced | 38 | #include "solib.h" |
07b82ea5 | 39 | #include "exec.h" |
edb3359d | 40 | #include "inline-frame.h" |
2f4d8875 | 41 | #include "tracepoint.h" |
7313baad | 42 | #include "gdb/fileio.h" |
8ffcbaaf | 43 | #include "agent.h" |
8de71aab | 44 | #include "auxv.h" |
a7068b60 | 45 | #include "target-debug.h" |
41fd2b0f PA |
46 | #include "top.h" |
47 | #include "event-top.h" | |
325fac50 | 48 | #include <algorithm> |
26fcd5d7 | 49 | #include "byte-vector.h" |
e671cd59 | 50 | #include "terminal.h" |
9018be22 | 51 | #include <algorithm> |
d9f719f1 | 52 | #include <unordered_map> |
c906108c | 53 | |
f0f9ff95 TT |
54 | static void generic_tls_error (void) ATTRIBUTE_NORETURN; |
55 | ||
0a4f40a2 | 56 | static void default_terminal_info (struct target_ops *, const char *, int); |
c906108c | 57 | |
5009afc5 AS |
58 | static int default_watchpoint_addr_within_range (struct target_ops *, |
59 | CORE_ADDR, CORE_ADDR, int); | |
60 | ||
31568a15 TT |
61 | static int default_region_ok_for_hw_watchpoint (struct target_ops *, |
62 | CORE_ADDR, int); | |
e0d24f8d | 63 | |
a30bf1f1 | 64 | static void default_rcmd (struct target_ops *, const char *, struct ui_file *); |
a53f3625 | 65 | |
4229b31d TT |
66 | static ptid_t default_get_ada_task_ptid (struct target_ops *self, |
67 | long lwp, long tid); | |
68 | ||
098dba18 TT |
69 | static int default_follow_fork (struct target_ops *self, int follow_child, |
70 | int detach_fork); | |
71 | ||
8d657035 TT |
72 | static void default_mourn_inferior (struct target_ops *self); |
73 | ||
58a5184e TT |
74 | static int default_search_memory (struct target_ops *ops, |
75 | CORE_ADDR start_addr, | |
76 | ULONGEST search_space_len, | |
77 | const gdb_byte *pattern, | |
78 | ULONGEST pattern_len, | |
79 | CORE_ADDR *found_addrp); | |
80 | ||
936d2992 PA |
81 | static int default_verify_memory (struct target_ops *self, |
82 | const gdb_byte *data, | |
83 | CORE_ADDR memaddr, ULONGEST size); | |
84 | ||
8eaff7cd TT |
85 | static struct address_space *default_thread_address_space |
86 | (struct target_ops *self, ptid_t ptid); | |
87 | ||
c25c4a8b | 88 | static void tcomplain (void) ATTRIBUTE_NORETURN; |
c906108c | 89 | |
a121b7c1 | 90 | static struct target_ops *find_default_run_target (const char *); |
c906108c | 91 | |
c2250ad1 UW |
92 | static struct gdbarch *default_thread_architecture (struct target_ops *ops, |
93 | ptid_t ptid); | |
94 | ||
0b5a2719 TT |
95 | static int dummy_find_memory_regions (struct target_ops *self, |
96 | find_memory_region_ftype ignore1, | |
97 | void *ignore2); | |
98 | ||
16f796b1 TT |
99 | static char *dummy_make_corefile_notes (struct target_ops *self, |
100 | bfd *ignore1, int *ignore2); | |
101 | ||
7a114964 | 102 | static const char *default_pid_to_str (struct target_ops *ops, ptid_t ptid); |
770234d3 | 103 | |
fe31bf5b TT |
104 | static enum exec_direction_kind default_execution_direction |
105 | (struct target_ops *self); | |
106 | ||
d9f719f1 PA |
107 | /* Mapping between target_info objects (which have address identity) |
108 | and corresponding open/factory function/callback. Each add_target | |
109 | call adds one entry to this map, and registers a "target | |
110 | TARGET_NAME" command that when invoked calls the factory registered | |
111 | here. The target_info object is associated with the command via | |
112 | the command's context. */ | |
113 | static std::unordered_map<const target_info *, target_open_ftype *> | |
114 | target_factories; | |
c906108c SS |
115 | |
116 | /* The initial current target, so that there is always a semi-valid | |
117 | current target. */ | |
118 | ||
f6ac5f3d PA |
119 | static struct target_ops *the_dummy_target; |
120 | static struct target_ops *the_debug_target; | |
c906108c SS |
121 | |
122 | /* Top of target stack. */ | |
c906108c SS |
123 | /* The target structure we are currently using to talk to a process |
124 | or file or whatever "inferior" we have. */ | |
125 | ||
8b88a78e PA |
126 | static target_ops *g_current_top_target; |
127 | ||
128 | target_ops * | |
129 | current_top_target () | |
130 | { | |
131 | return g_current_top_target; | |
132 | } | |
c906108c SS |
133 | |
134 | /* Command list for target. */ | |
135 | ||
136 | static struct cmd_list_element *targetlist = NULL; | |
137 | ||
cf7a04e8 DJ |
138 | /* Nonzero if we should trust readonly sections from the |
139 | executable when reading memory. */ | |
140 | ||
141 | static int trust_readonly = 0; | |
142 | ||
8defab1a DJ |
143 | /* Nonzero if we should show true memory content including |
144 | memory breakpoint inserted by gdb. */ | |
145 | ||
146 | static int show_memory_breakpoints = 0; | |
147 | ||
d914c394 SS |
148 | /* These globals control whether GDB attempts to perform these |
149 | operations; they are useful for targets that need to prevent | |
150 | inadvertant disruption, such as in non-stop mode. */ | |
151 | ||
152 | int may_write_registers = 1; | |
153 | ||
154 | int may_write_memory = 1; | |
155 | ||
156 | int may_insert_breakpoints = 1; | |
157 | ||
158 | int may_insert_tracepoints = 1; | |
159 | ||
160 | int may_insert_fast_tracepoints = 1; | |
161 | ||
162 | int may_stop = 1; | |
163 | ||
c906108c SS |
164 | /* Non-zero if we want to see trace of target level stuff. */ |
165 | ||
ccce17b0 | 166 | static unsigned int targetdebug = 0; |
3cecbbbe TT |
167 | |
168 | static void | |
eb4c3f4a | 169 | set_targetdebug (const char *args, int from_tty, struct cmd_list_element *c) |
3cecbbbe | 170 | { |
f6ac5f3d PA |
171 | if (targetdebug) |
172 | push_target (the_debug_target); | |
173 | else | |
174 | unpush_target (the_debug_target); | |
3cecbbbe TT |
175 | } |
176 | ||
920d2a44 AC |
177 | static void |
178 | show_targetdebug (struct ui_file *file, int from_tty, | |
179 | struct cmd_list_element *c, const char *value) | |
180 | { | |
181 | fprintf_filtered (file, _("Target debugging is %s.\n"), value); | |
182 | } | |
c906108c | 183 | |
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 | ||
d9f719f1 PA |
193 | #if GDB_SELF_TEST |
194 | namespace selftests { | |
195 | ||
196 | /* A mock process_stratum target_ops that doesn't read/write registers | |
197 | anywhere. */ | |
198 | ||
199 | static const target_info test_target_info = { | |
200 | "test", | |
201 | N_("unit tests target"), | |
202 | N_("You should never see this"), | |
203 | }; | |
204 | ||
205 | const target_info & | |
206 | test_target_ops::info () const | |
207 | { | |
208 | return test_target_info; | |
209 | } | |
210 | ||
211 | } /* namespace selftests */ | |
212 | #endif /* GDB_SELF_TEST */ | |
213 | ||
c35b1492 PA |
214 | /* Default target_has_* methods for process_stratum targets. */ |
215 | ||
216 | int | |
f6ac5f3d | 217 | default_child_has_all_memory () |
c35b1492 PA |
218 | { |
219 | /* If no inferior selected, then we can't read memory here. */ | |
220 | if (ptid_equal (inferior_ptid, null_ptid)) | |
221 | return 0; | |
222 | ||
223 | return 1; | |
224 | } | |
225 | ||
226 | int | |
f6ac5f3d | 227 | default_child_has_memory () |
c35b1492 PA |
228 | { |
229 | /* If no inferior selected, then we can't read memory here. */ | |
230 | if (ptid_equal (inferior_ptid, null_ptid)) | |
231 | return 0; | |
232 | ||
233 | return 1; | |
234 | } | |
235 | ||
236 | int | |
f6ac5f3d | 237 | default_child_has_stack () |
c35b1492 PA |
238 | { |
239 | /* If no inferior selected, there's no stack. */ | |
240 | if (ptid_equal (inferior_ptid, null_ptid)) | |
241 | return 0; | |
242 | ||
243 | return 1; | |
244 | } | |
245 | ||
246 | int | |
f6ac5f3d | 247 | default_child_has_registers () |
c35b1492 PA |
248 | { |
249 | /* Can't read registers from no inferior. */ | |
250 | if (ptid_equal (inferior_ptid, null_ptid)) | |
251 | return 0; | |
252 | ||
253 | return 1; | |
254 | } | |
255 | ||
256 | int | |
f6ac5f3d | 257 | default_child_has_execution (ptid_t the_ptid) |
c35b1492 PA |
258 | { |
259 | /* If there's no thread selected, then we can't make it run through | |
260 | hoops. */ | |
aeaec162 | 261 | if (ptid_equal (the_ptid, null_ptid)) |
c35b1492 PA |
262 | return 0; |
263 | ||
264 | return 1; | |
265 | } | |
266 | ||
267 | ||
268 | int | |
269 | target_has_all_memory_1 (void) | |
270 | { | |
271 | struct target_ops *t; | |
272 | ||
8b88a78e | 273 | for (t = current_top_target (); t != NULL; t = t->beneath) |
f6ac5f3d | 274 | if (t->has_all_memory ()) |
c35b1492 PA |
275 | return 1; |
276 | ||
277 | return 0; | |
278 | } | |
279 | ||
280 | int | |
281 | target_has_memory_1 (void) | |
282 | { | |
283 | struct target_ops *t; | |
284 | ||
8b88a78e | 285 | for (t = current_top_target (); t != NULL; t = t->beneath) |
f6ac5f3d | 286 | if (t->has_memory ()) |
c35b1492 PA |
287 | return 1; |
288 | ||
289 | return 0; | |
290 | } | |
291 | ||
292 | int | |
293 | target_has_stack_1 (void) | |
294 | { | |
295 | struct target_ops *t; | |
296 | ||
8b88a78e | 297 | for (t = current_top_target (); t != NULL; t = t->beneath) |
f6ac5f3d | 298 | if (t->has_stack ()) |
c35b1492 PA |
299 | return 1; |
300 | ||
301 | return 0; | |
302 | } | |
303 | ||
304 | int | |
305 | target_has_registers_1 (void) | |
306 | { | |
307 | struct target_ops *t; | |
308 | ||
8b88a78e | 309 | for (t = current_top_target (); t != NULL; t = t->beneath) |
f6ac5f3d | 310 | if (t->has_registers ()) |
c35b1492 PA |
311 | return 1; |
312 | ||
313 | return 0; | |
314 | } | |
315 | ||
316 | int | |
aeaec162 | 317 | target_has_execution_1 (ptid_t the_ptid) |
c35b1492 PA |
318 | { |
319 | struct target_ops *t; | |
320 | ||
8b88a78e | 321 | for (t = current_top_target (); t != NULL; t = t->beneath) |
f6ac5f3d | 322 | if (t->has_execution (the_ptid)) |
c35b1492 PA |
323 | return 1; |
324 | ||
325 | return 0; | |
326 | } | |
327 | ||
aeaec162 TT |
328 | int |
329 | target_has_execution_current (void) | |
330 | { | |
331 | return target_has_execution_1 (inferior_ptid); | |
332 | } | |
333 | ||
8981c758 TT |
334 | /* This is used to implement the various target commands. */ |
335 | ||
336 | static void | |
eb4c3f4a | 337 | open_target (const char *args, int from_tty, struct cmd_list_element *command) |
8981c758 | 338 | { |
d9f719f1 PA |
339 | auto *ti = static_cast<target_info *> (get_cmd_context (command)); |
340 | target_open_ftype *func = target_factories[ti]; | |
8981c758 TT |
341 | |
342 | if (targetdebug) | |
d9f719f1 PA |
343 | fprintf_unfiltered (gdb_stdlog, "-> %s->open (...)\n", |
344 | ti->shortname); | |
8981c758 | 345 | |
d9f719f1 | 346 | func (args, from_tty); |
8981c758 TT |
347 | |
348 | if (targetdebug) | |
d9f719f1 PA |
349 | fprintf_unfiltered (gdb_stdlog, "<- %s->open (%s, %d)\n", |
350 | ti->shortname, args, from_tty); | |
8981c758 TT |
351 | } |
352 | ||
d9f719f1 | 353 | /* See target.h. */ |
c22a2b88 TT |
354 | |
355 | void | |
d9f719f1 PA |
356 | add_target (const target_info &t, target_open_ftype *func, |
357 | completer_ftype *completer) | |
c22a2b88 TT |
358 | { |
359 | struct cmd_list_element *c; | |
360 | ||
d9f719f1 PA |
361 | auto &func_slot = target_factories[&t]; |
362 | if (func_slot != nullptr) | |
363 | internal_error (__FILE__, __LINE__, | |
364 | _("target already added (\"%s\")."), t.shortname); | |
365 | func_slot = func; | |
c906108c SS |
366 | |
367 | if (targetlist == NULL) | |
1bedd215 AC |
368 | add_prefix_cmd ("target", class_run, target_command, _("\ |
369 | Connect to a target machine or process.\n\ | |
c906108c SS |
370 | The first argument is the type or protocol of the target machine.\n\ |
371 | Remaining arguments are interpreted by the target protocol. For more\n\ | |
372 | information on the arguments for a particular protocol, type\n\ | |
1bedd215 | 373 | `help target ' followed by the protocol name."), |
c906108c | 374 | &targetlist, "target ", 0, &cmdlist); |
d9f719f1 PA |
375 | c = add_cmd (t.shortname, no_class, t.doc, &targetlist); |
376 | set_cmd_context (c, (void *) &t); | |
8981c758 | 377 | set_cmd_sfunc (c, open_target); |
9852c492 YQ |
378 | if (completer != NULL) |
379 | set_cmd_completer (c, completer); | |
380 | } | |
381 | ||
b48d48eb MM |
382 | /* See target.h. */ |
383 | ||
384 | void | |
d9f719f1 | 385 | add_deprecated_target_alias (const target_info &tinfo, const char *alias) |
b48d48eb MM |
386 | { |
387 | struct cmd_list_element *c; | |
388 | char *alt; | |
389 | ||
390 | /* If we use add_alias_cmd, here, we do not get the deprecated warning, | |
391 | see PR cli/15104. */ | |
d9f719f1 | 392 | c = add_cmd (alias, no_class, tinfo.doc, &targetlist); |
8981c758 | 393 | set_cmd_sfunc (c, open_target); |
d9f719f1 PA |
394 | set_cmd_context (c, (void *) &tinfo); |
395 | alt = xstrprintf ("target %s", tinfo.shortname); | |
b48d48eb MM |
396 | deprecate_cmd (c, alt); |
397 | } | |
398 | ||
c906108c SS |
399 | /* Stub functions */ |
400 | ||
7d85a9c0 JB |
401 | void |
402 | target_kill (void) | |
403 | { | |
8b88a78e | 404 | current_top_target ()->kill (); |
7d85a9c0 JB |
405 | } |
406 | ||
11cf8741 | 407 | void |
9cbe5fff | 408 | target_load (const char *arg, int from_tty) |
11cf8741 | 409 | { |
4e5d721f | 410 | target_dcache_invalidate (); |
8b88a78e | 411 | current_top_target ()->load (arg, from_tty); |
11cf8741 JM |
412 | } |
413 | ||
223ffa71 | 414 | /* Define it. */ |
5842f62a | 415 | |
e671cd59 PA |
416 | target_terminal_state target_terminal::m_terminal_state |
417 | = target_terminal_state::is_ours; | |
5842f62a | 418 | |
223ffa71 | 419 | /* See target/target.h. */ |
5842f62a PA |
420 | |
421 | void | |
223ffa71 | 422 | target_terminal::init (void) |
5842f62a | 423 | { |
8b88a78e | 424 | current_top_target ()->terminal_init (); |
5842f62a | 425 | |
e671cd59 | 426 | m_terminal_state = target_terminal_state::is_ours; |
5842f62a PA |
427 | } |
428 | ||
223ffa71 | 429 | /* See target/target.h. */ |
2f99e8fc | 430 | |
d9d2d8b6 | 431 | void |
223ffa71 | 432 | target_terminal::inferior (void) |
d9d2d8b6 | 433 | { |
41fd2b0f PA |
434 | struct ui *ui = current_ui; |
435 | ||
d9d2d8b6 | 436 | /* A background resume (``run&'') should leave GDB in control of the |
3b12939d PA |
437 | terminal. */ |
438 | if (ui->prompt_state != PROMPT_BLOCKED) | |
d9d2d8b6 PA |
439 | return; |
440 | ||
215d3118 PA |
441 | /* Since we always run the inferior in the main console (unless "set |
442 | inferior-tty" is in effect), when some UI other than the main one | |
223ffa71 TT |
443 | calls target_terminal::inferior, then we leave the main UI's |
444 | terminal settings as is. */ | |
215d3118 PA |
445 | if (ui != main_ui) |
446 | return; | |
447 | ||
d9d2d8b6 PA |
448 | /* If GDB is resuming the inferior in the foreground, install |
449 | inferior's terminal modes. */ | |
e671cd59 PA |
450 | |
451 | struct inferior *inf = current_inferior (); | |
452 | ||
453 | if (inf->terminal_state != target_terminal_state::is_inferior) | |
454 | { | |
8b88a78e | 455 | current_top_target ()->terminal_inferior (); |
e671cd59 PA |
456 | inf->terminal_state = target_terminal_state::is_inferior; |
457 | } | |
458 | ||
459 | m_terminal_state = target_terminal_state::is_inferior; | |
460 | ||
461 | /* If the user hit C-c before, pretend that it was hit right | |
462 | here. */ | |
463 | if (check_quit_flag ()) | |
464 | target_pass_ctrlc (); | |
465 | } | |
466 | ||
467 | /* See target/target.h. */ | |
468 | ||
469 | void | |
470 | target_terminal::restore_inferior (void) | |
471 | { | |
472 | struct ui *ui = current_ui; | |
473 | ||
474 | /* See target_terminal::inferior(). */ | |
475 | if (ui->prompt_state != PROMPT_BLOCKED || ui != main_ui) | |
476 | return; | |
477 | ||
478 | /* Restore the terminal settings of inferiors that were in the | |
479 | foreground but are now ours_for_output due to a temporary | |
480 | target_target::ours_for_output() call. */ | |
481 | ||
482 | { | |
483 | scoped_restore_current_inferior restore_inferior; | |
484 | struct inferior *inf; | |
485 | ||
486 | ALL_INFERIORS (inf) | |
487 | { | |
488 | if (inf->terminal_state == target_terminal_state::is_ours_for_output) | |
489 | { | |
490 | set_current_inferior (inf); | |
8b88a78e | 491 | current_top_target ()->terminal_inferior (); |
e671cd59 PA |
492 | inf->terminal_state = target_terminal_state::is_inferior; |
493 | } | |
494 | } | |
495 | } | |
496 | ||
497 | m_terminal_state = target_terminal_state::is_inferior; | |
93692b58 PA |
498 | |
499 | /* If the user hit C-c before, pretend that it was hit right | |
500 | here. */ | |
501 | if (check_quit_flag ()) | |
502 | target_pass_ctrlc (); | |
5842f62a PA |
503 | } |
504 | ||
e671cd59 PA |
505 | /* Switch terminal state to DESIRED_STATE, either is_ours, or |
506 | is_ours_for_output. */ | |
507 | ||
508 | static void | |
509 | target_terminal_is_ours_kind (target_terminal_state desired_state) | |
510 | { | |
511 | scoped_restore_current_inferior restore_inferior; | |
512 | struct inferior *inf; | |
513 | ||
514 | /* Must do this in two passes. First, have all inferiors save the | |
515 | current terminal settings. Then, after all inferiors have add a | |
516 | chance to safely save the terminal settings, restore GDB's | |
517 | terminal settings. */ | |
518 | ||
519 | ALL_INFERIORS (inf) | |
520 | { | |
521 | if (inf->terminal_state == target_terminal_state::is_inferior) | |
522 | { | |
523 | set_current_inferior (inf); | |
8b88a78e | 524 | current_top_target ()->terminal_save_inferior (); |
e671cd59 PA |
525 | } |
526 | } | |
527 | ||
528 | ALL_INFERIORS (inf) | |
529 | { | |
530 | /* Note we don't check is_inferior here like above because we | |
531 | need to handle 'is_ours_for_output -> is_ours' too. Careful | |
532 | to never transition from 'is_ours' to 'is_ours_for_output', | |
533 | though. */ | |
534 | if (inf->terminal_state != target_terminal_state::is_ours | |
535 | && inf->terminal_state != desired_state) | |
536 | { | |
537 | set_current_inferior (inf); | |
538 | if (desired_state == target_terminal_state::is_ours) | |
8b88a78e | 539 | current_top_target ()->terminal_ours (); |
e671cd59 | 540 | else if (desired_state == target_terminal_state::is_ours_for_output) |
8b88a78e | 541 | current_top_target ()->terminal_ours_for_output (); |
e671cd59 PA |
542 | else |
543 | gdb_assert_not_reached ("unhandled desired state"); | |
544 | inf->terminal_state = desired_state; | |
545 | } | |
546 | } | |
547 | } | |
548 | ||
223ffa71 | 549 | /* See target/target.h. */ |
5842f62a PA |
550 | |
551 | void | |
223ffa71 | 552 | target_terminal::ours () |
5842f62a | 553 | { |
41fd2b0f PA |
554 | struct ui *ui = current_ui; |
555 | ||
223ffa71 | 556 | /* See target_terminal::inferior. */ |
215d3118 PA |
557 | if (ui != main_ui) |
558 | return; | |
559 | ||
e671cd59 | 560 | if (m_terminal_state == target_terminal_state::is_ours) |
5842f62a PA |
561 | return; |
562 | ||
e671cd59 PA |
563 | target_terminal_is_ours_kind (target_terminal_state::is_ours); |
564 | m_terminal_state = target_terminal_state::is_ours; | |
5842f62a PA |
565 | } |
566 | ||
223ffa71 | 567 | /* See target/target.h. */ |
5842f62a PA |
568 | |
569 | void | |
223ffa71 | 570 | target_terminal::ours_for_output () |
5842f62a | 571 | { |
215d3118 PA |
572 | struct ui *ui = current_ui; |
573 | ||
223ffa71 | 574 | /* See target_terminal::inferior. */ |
215d3118 PA |
575 | if (ui != main_ui) |
576 | return; | |
577 | ||
e671cd59 | 578 | if (!target_terminal::is_inferior ()) |
5842f62a | 579 | return; |
e671cd59 PA |
580 | |
581 | target_terminal_is_ours_kind (target_terminal_state::is_ours_for_output); | |
582 | target_terminal::m_terminal_state = target_terminal_state::is_ours_for_output; | |
d9d2d8b6 | 583 | } |
136d6dae | 584 | |
223ffa71 TT |
585 | /* See target/target.h. */ |
586 | ||
587 | void | |
588 | target_terminal::info (const char *arg, int from_tty) | |
589 | { | |
8b88a78e | 590 | current_top_target ()->terminal_info (arg, from_tty); |
223ffa71 TT |
591 | } |
592 | ||
b0ed115f TT |
593 | /* See target.h. */ |
594 | ||
595 | int | |
596 | target_supports_terminal_ours (void) | |
597 | { | |
8b88a78e | 598 | return current_top_target ()->supports_terminal_ours (); |
b0ed115f TT |
599 | } |
600 | ||
c906108c | 601 | static void |
fba45db2 | 602 | tcomplain (void) |
c906108c | 603 | { |
8a3fe4f8 | 604 | error (_("You can't do that when your target is `%s'"), |
8b88a78e | 605 | current_top_target ()->shortname ()); |
c906108c SS |
606 | } |
607 | ||
608 | void | |
fba45db2 | 609 | noprocess (void) |
c906108c | 610 | { |
8a3fe4f8 | 611 | error (_("You can't do that without a process to debug.")); |
c906108c SS |
612 | } |
613 | ||
c906108c | 614 | static void |
0a4f40a2 | 615 | default_terminal_info (struct target_ops *self, const char *args, int from_tty) |
c906108c | 616 | { |
a3f17187 | 617 | printf_unfiltered (_("No saved terminal information.\n")); |
c906108c SS |
618 | } |
619 | ||
0ef643c8 JB |
620 | /* A default implementation for the to_get_ada_task_ptid target method. |
621 | ||
622 | This function builds the PTID by using both LWP and TID as part of | |
623 | the PTID lwp and tid elements. The pid used is the pid of the | |
624 | inferior_ptid. */ | |
625 | ||
2c0b251b | 626 | static ptid_t |
1e6b91a4 | 627 | default_get_ada_task_ptid (struct target_ops *self, long lwp, long tid) |
0ef643c8 JB |
628 | { |
629 | return ptid_build (ptid_get_pid (inferior_ptid), lwp, tid); | |
630 | } | |
631 | ||
32231432 | 632 | static enum exec_direction_kind |
4c612759 | 633 | default_execution_direction (struct target_ops *self) |
32231432 PA |
634 | { |
635 | if (!target_can_execute_reverse) | |
636 | return EXEC_FORWARD; | |
637 | else if (!target_can_async_p ()) | |
638 | return EXEC_FORWARD; | |
639 | else | |
640 | gdb_assert_not_reached ("\ | |
641 | to_execution_direction must be implemented for reverse async"); | |
642 | } | |
643 | ||
c906108c SS |
644 | /* Push a new target type into the stack of the existing target accessors, |
645 | possibly superseding some of the existing accessors. | |
646 | ||
c906108c SS |
647 | Rather than allow an empty stack, we always have the dummy target at |
648 | the bottom stratum, so we can call the function vectors without | |
649 | checking them. */ | |
650 | ||
b26a4dcb | 651 | void |
fba45db2 | 652 | push_target (struct target_ops *t) |
c906108c | 653 | { |
258b763a | 654 | struct target_ops **cur; |
c906108c | 655 | |
258b763a | 656 | /* Find the proper stratum to install this target in. */ |
8b88a78e | 657 | for (cur = &g_current_top_target; (*cur) != NULL; cur = &(*cur)->beneath) |
c906108c | 658 | { |
258b763a | 659 | if ((int) (t->to_stratum) >= (int) (*cur)->to_stratum) |
c906108c SS |
660 | break; |
661 | } | |
662 | ||
258b763a | 663 | /* If there's already targets at this stratum, remove them. */ |
88c231eb | 664 | /* FIXME: cagney/2003-10-15: I think this should be popping all |
258b763a AC |
665 | targets to CUR, and not just those at this stratum level. */ |
666 | while ((*cur) != NULL && t->to_stratum == (*cur)->to_stratum) | |
667 | { | |
668 | /* There's already something at this stratum level. Close it, | |
669 | and un-hook it from the stack. */ | |
670 | struct target_ops *tmp = (*cur); | |
5d502164 | 671 | |
258b763a AC |
672 | (*cur) = (*cur)->beneath; |
673 | tmp->beneath = NULL; | |
460014f5 | 674 | target_close (tmp); |
258b763a | 675 | } |
c906108c SS |
676 | |
677 | /* We have removed all targets in our stratum, now add the new one. */ | |
258b763a AC |
678 | t->beneath = (*cur); |
679 | (*cur) = t; | |
c906108c SS |
680 | } |
681 | ||
2bc416ba | 682 | /* Remove a target_ops vector from the stack, wherever it may be. |
c906108c SS |
683 | Return how many times it was removed (0 or 1). */ |
684 | ||
685 | int | |
fba45db2 | 686 | unpush_target (struct target_ops *t) |
c906108c | 687 | { |
258b763a AC |
688 | struct target_ops **cur; |
689 | struct target_ops *tmp; | |
c906108c | 690 | |
c8d104ad PA |
691 | if (t->to_stratum == dummy_stratum) |
692 | internal_error (__FILE__, __LINE__, | |
9b20d036 | 693 | _("Attempt to unpush the dummy target")); |
c8d104ad | 694 | |
c906108c | 695 | /* Look for the specified target. Note that we assume that a target |
c378eb4e | 696 | can only occur once in the target stack. */ |
c906108c | 697 | |
8b88a78e | 698 | for (cur = &g_current_top_target; (*cur) != NULL; cur = &(*cur)->beneath) |
258b763a AC |
699 | { |
700 | if ((*cur) == t) | |
701 | break; | |
702 | } | |
c906108c | 703 | |
305436e0 PA |
704 | /* If we don't find target_ops, quit. Only open targets should be |
705 | closed. */ | |
258b763a | 706 | if ((*cur) == NULL) |
305436e0 | 707 | return 0; |
5269965e | 708 | |
c378eb4e | 709 | /* Unchain the target. */ |
258b763a AC |
710 | tmp = (*cur); |
711 | (*cur) = (*cur)->beneath; | |
712 | tmp->beneath = NULL; | |
c906108c | 713 | |
305436e0 PA |
714 | /* Finally close the target. Note we do this after unchaining, so |
715 | any target method calls from within the target_close | |
716 | implementation don't end up in T anymore. */ | |
460014f5 | 717 | target_close (t); |
305436e0 | 718 | |
c906108c SS |
719 | return 1; |
720 | } | |
721 | ||
915ef8b1 PA |
722 | /* Unpush TARGET and assert that it worked. */ |
723 | ||
724 | static void | |
725 | unpush_target_and_assert (struct target_ops *target) | |
726 | { | |
727 | if (!unpush_target (target)) | |
728 | { | |
729 | fprintf_unfiltered (gdb_stderr, | |
730 | "pop_all_targets couldn't find target %s\n", | |
f6ac5f3d | 731 | target->shortname ()); |
915ef8b1 PA |
732 | internal_error (__FILE__, __LINE__, |
733 | _("failed internal consistency check")); | |
734 | } | |
735 | } | |
736 | ||
aa76d38d | 737 | void |
460014f5 | 738 | pop_all_targets_above (enum strata above_stratum) |
aa76d38d | 739 | { |
8b88a78e PA |
740 | while ((int) (current_top_target ()->to_stratum) > (int) above_stratum) |
741 | unpush_target_and_assert (current_top_target ()); | |
915ef8b1 PA |
742 | } |
743 | ||
744 | /* See target.h. */ | |
745 | ||
746 | void | |
747 | pop_all_targets_at_and_above (enum strata stratum) | |
748 | { | |
8b88a78e PA |
749 | while ((int) (current_top_target ()->to_stratum) >= (int) stratum) |
750 | unpush_target_and_assert (current_top_target ()); | |
aa76d38d PA |
751 | } |
752 | ||
87ab71f0 | 753 | void |
460014f5 | 754 | pop_all_targets (void) |
87ab71f0 | 755 | { |
460014f5 | 756 | pop_all_targets_above (dummy_stratum); |
87ab71f0 PA |
757 | } |
758 | ||
c0edd9ed JK |
759 | /* Return 1 if T is now pushed in the target stack. Return 0 otherwise. */ |
760 | ||
761 | int | |
762 | target_is_pushed (struct target_ops *t) | |
763 | { | |
84202f9c | 764 | struct target_ops *cur; |
c0edd9ed | 765 | |
8b88a78e | 766 | for (cur = current_top_target (); cur != NULL; cur = cur->beneath) |
84202f9c | 767 | if (cur == t) |
c0edd9ed JK |
768 | return 1; |
769 | ||
770 | return 0; | |
771 | } | |
772 | ||
f0f9ff95 TT |
773 | /* Default implementation of to_get_thread_local_address. */ |
774 | ||
775 | static void | |
776 | generic_tls_error (void) | |
777 | { | |
778 | throw_error (TLS_GENERIC_ERROR, | |
779 | _("Cannot find thread-local variables on this target")); | |
780 | } | |
781 | ||
72f5cf0e | 782 | /* Using the objfile specified in OBJFILE, find the address for the |
9e35dae4 DJ |
783 | current thread's thread-local storage with offset OFFSET. */ |
784 | CORE_ADDR | |
785 | target_translate_tls_address (struct objfile *objfile, CORE_ADDR offset) | |
786 | { | |
787 | volatile CORE_ADDR addr = 0; | |
8b88a78e | 788 | struct target_ops *target = current_top_target (); |
9e35dae4 | 789 | |
f0f9ff95 | 790 | if (gdbarch_fetch_tls_load_module_address_p (target_gdbarch ())) |
9e35dae4 DJ |
791 | { |
792 | ptid_t ptid = inferior_ptid; | |
9e35dae4 | 793 | |
492d29ea | 794 | TRY |
9e35dae4 DJ |
795 | { |
796 | CORE_ADDR lm_addr; | |
797 | ||
798 | /* Fetch the load module address for this objfile. */ | |
f5656ead | 799 | lm_addr = gdbarch_fetch_tls_load_module_address (target_gdbarch (), |
9e35dae4 | 800 | objfile); |
9e35dae4 | 801 | |
f6ac5f3d | 802 | addr = target->get_thread_local_address (ptid, lm_addr, offset); |
9e35dae4 DJ |
803 | } |
804 | /* If an error occurred, print TLS related messages here. Otherwise, | |
805 | throw the error to some higher catcher. */ | |
492d29ea | 806 | CATCH (ex, RETURN_MASK_ALL) |
9e35dae4 DJ |
807 | { |
808 | int objfile_is_library = (objfile->flags & OBJF_SHARED); | |
809 | ||
810 | switch (ex.error) | |
811 | { | |
812 | case TLS_NO_LIBRARY_SUPPORT_ERROR: | |
3e43a32a MS |
813 | error (_("Cannot find thread-local variables " |
814 | "in this thread library.")); | |
9e35dae4 DJ |
815 | break; |
816 | case TLS_LOAD_MODULE_NOT_FOUND_ERROR: | |
817 | if (objfile_is_library) | |
818 | error (_("Cannot find shared library `%s' in dynamic" | |
4262abfb | 819 | " linker's load module list"), objfile_name (objfile)); |
9e35dae4 DJ |
820 | else |
821 | error (_("Cannot find executable file `%s' in dynamic" | |
4262abfb | 822 | " linker's load module list"), objfile_name (objfile)); |
9e35dae4 DJ |
823 | break; |
824 | case TLS_NOT_ALLOCATED_YET_ERROR: | |
825 | if (objfile_is_library) | |
826 | error (_("The inferior has not yet allocated storage for" | |
827 | " thread-local variables in\n" | |
828 | "the shared library `%s'\n" | |
829 | "for %s"), | |
4262abfb | 830 | objfile_name (objfile), target_pid_to_str (ptid)); |
9e35dae4 DJ |
831 | else |
832 | error (_("The inferior has not yet allocated storage for" | |
833 | " thread-local variables in\n" | |
834 | "the executable `%s'\n" | |
835 | "for %s"), | |
4262abfb | 836 | objfile_name (objfile), target_pid_to_str (ptid)); |
9e35dae4 DJ |
837 | break; |
838 | case TLS_GENERIC_ERROR: | |
839 | if (objfile_is_library) | |
840 | error (_("Cannot find thread-local storage for %s, " | |
841 | "shared library %s:\n%s"), | |
842 | target_pid_to_str (ptid), | |
4262abfb | 843 | objfile_name (objfile), ex.message); |
9e35dae4 DJ |
844 | else |
845 | error (_("Cannot find thread-local storage for %s, " | |
846 | "executable file %s:\n%s"), | |
847 | target_pid_to_str (ptid), | |
4262abfb | 848 | objfile_name (objfile), ex.message); |
9e35dae4 DJ |
849 | break; |
850 | default: | |
851 | throw_exception (ex); | |
852 | break; | |
853 | } | |
854 | } | |
492d29ea | 855 | END_CATCH |
9e35dae4 DJ |
856 | } |
857 | /* It wouldn't be wrong here to try a gdbarch method, too; finding | |
858 | TLS is an ABI-specific thing. But we don't do that yet. */ | |
859 | else | |
860 | error (_("Cannot find thread-local variables on this target")); | |
861 | ||
862 | return addr; | |
863 | } | |
864 | ||
6be7b56e | 865 | const char * |
01cb8804 | 866 | target_xfer_status_to_string (enum target_xfer_status status) |
6be7b56e PA |
867 | { |
868 | #define CASE(X) case X: return #X | |
01cb8804 | 869 | switch (status) |
6be7b56e PA |
870 | { |
871 | CASE(TARGET_XFER_E_IO); | |
bc113b4e | 872 | CASE(TARGET_XFER_UNAVAILABLE); |
6be7b56e PA |
873 | default: |
874 | return "<unknown>"; | |
875 | } | |
876 | #undef CASE | |
877 | }; | |
878 | ||
879 | ||
c906108c SS |
880 | #undef MIN |
881 | #define MIN(A, B) (((A) <= (B)) ? (A) : (B)) | |
882 | ||
883 | /* target_read_string -- read a null terminated string, up to LEN bytes, | |
884 | from MEMADDR in target. Set *ERRNOP to the errno code, or 0 if successful. | |
885 | Set *STRING to a pointer to malloc'd memory containing the data; the caller | |
886 | is responsible for freeing it. Return the number of bytes successfully | |
887 | read. */ | |
888 | ||
889 | int | |
e83e4e24 TT |
890 | target_read_string (CORE_ADDR memaddr, gdb::unique_xmalloc_ptr<char> *string, |
891 | int len, int *errnop) | |
c906108c | 892 | { |
c2e8b827 | 893 | int tlen, offset, i; |
1b0ba102 | 894 | gdb_byte buf[4]; |
c906108c SS |
895 | int errcode = 0; |
896 | char *buffer; | |
897 | int buffer_allocated; | |
898 | char *bufptr; | |
899 | unsigned int nbytes_read = 0; | |
900 | ||
6217bf3e MS |
901 | gdb_assert (string); |
902 | ||
c906108c SS |
903 | /* Small for testing. */ |
904 | buffer_allocated = 4; | |
224c3ddb | 905 | buffer = (char *) xmalloc (buffer_allocated); |
c906108c SS |
906 | bufptr = buffer; |
907 | ||
c906108c SS |
908 | while (len > 0) |
909 | { | |
910 | tlen = MIN (len, 4 - (memaddr & 3)); | |
911 | offset = memaddr & 3; | |
912 | ||
1b0ba102 | 913 | errcode = target_read_memory (memaddr & ~3, buf, sizeof buf); |
c906108c SS |
914 | if (errcode != 0) |
915 | { | |
916 | /* The transfer request might have crossed the boundary to an | |
c378eb4e | 917 | unallocated region of memory. Retry the transfer, requesting |
c906108c SS |
918 | a single byte. */ |
919 | tlen = 1; | |
920 | offset = 0; | |
b8eb5af0 | 921 | errcode = target_read_memory (memaddr, buf, 1); |
c906108c SS |
922 | if (errcode != 0) |
923 | goto done; | |
924 | } | |
925 | ||
926 | if (bufptr - buffer + tlen > buffer_allocated) | |
927 | { | |
928 | unsigned int bytes; | |
5d502164 | 929 | |
c906108c SS |
930 | bytes = bufptr - buffer; |
931 | buffer_allocated *= 2; | |
224c3ddb | 932 | buffer = (char *) xrealloc (buffer, buffer_allocated); |
c906108c SS |
933 | bufptr = buffer + bytes; |
934 | } | |
935 | ||
936 | for (i = 0; i < tlen; i++) | |
937 | { | |
938 | *bufptr++ = buf[i + offset]; | |
939 | if (buf[i + offset] == '\000') | |
940 | { | |
941 | nbytes_read += i + 1; | |
942 | goto done; | |
943 | } | |
944 | } | |
945 | ||
946 | memaddr += tlen; | |
947 | len -= tlen; | |
948 | nbytes_read += tlen; | |
949 | } | |
c5aa993b | 950 | done: |
e83e4e24 | 951 | string->reset (buffer); |
c906108c SS |
952 | if (errnop != NULL) |
953 | *errnop = errcode; | |
c906108c SS |
954 | return nbytes_read; |
955 | } | |
956 | ||
07b82ea5 PA |
957 | struct target_section_table * |
958 | target_get_section_table (struct target_ops *target) | |
959 | { | |
f6ac5f3d | 960 | return target->get_section_table (); |
07b82ea5 PA |
961 | } |
962 | ||
8db32d44 | 963 | /* Find a section containing ADDR. */ |
07b82ea5 | 964 | |
0542c86d | 965 | struct target_section * |
8db32d44 AC |
966 | target_section_by_addr (struct target_ops *target, CORE_ADDR addr) |
967 | { | |
07b82ea5 | 968 | struct target_section_table *table = target_get_section_table (target); |
0542c86d | 969 | struct target_section *secp; |
07b82ea5 PA |
970 | |
971 | if (table == NULL) | |
972 | return NULL; | |
973 | ||
974 | for (secp = table->sections; secp < table->sections_end; secp++) | |
8db32d44 AC |
975 | { |
976 | if (addr >= secp->addr && addr < secp->endaddr) | |
977 | return secp; | |
978 | } | |
979 | return NULL; | |
980 | } | |
981 | ||
0fec99e8 PA |
982 | |
983 | /* Helper for the memory xfer routines. Checks the attributes of the | |
984 | memory region of MEMADDR against the read or write being attempted. | |
985 | If the access is permitted returns true, otherwise returns false. | |
986 | REGION_P is an optional output parameter. If not-NULL, it is | |
987 | filled with a pointer to the memory region of MEMADDR. REG_LEN | |
988 | returns LEN trimmed to the end of the region. This is how much the | |
989 | caller can continue requesting, if the access is permitted. A | |
990 | single xfer request must not straddle memory region boundaries. */ | |
991 | ||
992 | static int | |
993 | memory_xfer_check_region (gdb_byte *readbuf, const gdb_byte *writebuf, | |
994 | ULONGEST memaddr, ULONGEST len, ULONGEST *reg_len, | |
995 | struct mem_region **region_p) | |
996 | { | |
997 | struct mem_region *region; | |
998 | ||
999 | region = lookup_mem_region (memaddr); | |
1000 | ||
1001 | if (region_p != NULL) | |
1002 | *region_p = region; | |
1003 | ||
1004 | switch (region->attrib.mode) | |
1005 | { | |
1006 | case MEM_RO: | |
1007 | if (writebuf != NULL) | |
1008 | return 0; | |
1009 | break; | |
1010 | ||
1011 | case MEM_WO: | |
1012 | if (readbuf != NULL) | |
1013 | return 0; | |
1014 | break; | |
1015 | ||
1016 | case MEM_FLASH: | |
1017 | /* We only support writing to flash during "load" for now. */ | |
1018 | if (writebuf != NULL) | |
1019 | error (_("Writing to flash memory forbidden in this context")); | |
1020 | break; | |
1021 | ||
1022 | case MEM_NONE: | |
1023 | return 0; | |
1024 | } | |
1025 | ||
1026 | /* region->hi == 0 means there's no upper bound. */ | |
1027 | if (memaddr + len < region->hi || region->hi == 0) | |
1028 | *reg_len = len; | |
1029 | else | |
1030 | *reg_len = region->hi - memaddr; | |
1031 | ||
1032 | return 1; | |
1033 | } | |
1034 | ||
9f713294 YQ |
1035 | /* Read memory from more than one valid target. A core file, for |
1036 | instance, could have some of memory but delegate other bits to | |
1037 | the target below it. So, we must manually try all targets. */ | |
1038 | ||
cc9f16aa | 1039 | enum target_xfer_status |
17fde6d0 | 1040 | raw_memory_xfer_partial (struct target_ops *ops, gdb_byte *readbuf, |
9b409511 YQ |
1041 | const gdb_byte *writebuf, ULONGEST memaddr, LONGEST len, |
1042 | ULONGEST *xfered_len) | |
9f713294 | 1043 | { |
9b409511 | 1044 | enum target_xfer_status res; |
9f713294 YQ |
1045 | |
1046 | do | |
1047 | { | |
f6ac5f3d PA |
1048 | res = ops->xfer_partial (TARGET_OBJECT_MEMORY, NULL, |
1049 | readbuf, writebuf, memaddr, len, | |
1050 | xfered_len); | |
9b409511 | 1051 | if (res == TARGET_XFER_OK) |
9f713294 YQ |
1052 | break; |
1053 | ||
633785ff | 1054 | /* Stop if the target reports that the memory is not available. */ |
bc113b4e | 1055 | if (res == TARGET_XFER_UNAVAILABLE) |
633785ff MM |
1056 | break; |
1057 | ||
9f713294 YQ |
1058 | /* We want to continue past core files to executables, but not |
1059 | past a running target's memory. */ | |
f6ac5f3d | 1060 | if (ops->has_all_memory ()) |
9f713294 YQ |
1061 | break; |
1062 | ||
1063 | ops = ops->beneath; | |
1064 | } | |
1065 | while (ops != NULL); | |
1066 | ||
0f26cec1 PA |
1067 | /* The cache works at the raw memory level. Make sure the cache |
1068 | gets updated with raw contents no matter what kind of memory | |
1069 | object was originally being written. Note we do write-through | |
1070 | first, so that if it fails, we don't write to the cache contents | |
1071 | that never made it to the target. */ | |
1072 | if (writebuf != NULL | |
1073 | && !ptid_equal (inferior_ptid, null_ptid) | |
1074 | && target_dcache_init_p () | |
1075 | && (stack_cache_enabled_p () || code_cache_enabled_p ())) | |
1076 | { | |
1077 | DCACHE *dcache = target_dcache_get (); | |
1078 | ||
1079 | /* Note that writing to an area of memory which wasn't present | |
1080 | in the cache doesn't cause it to be loaded in. */ | |
1081 | dcache_update (dcache, res, memaddr, writebuf, *xfered_len); | |
1082 | } | |
1083 | ||
9f713294 YQ |
1084 | return res; |
1085 | } | |
1086 | ||
7f79c47e DE |
1087 | /* Perform a partial memory transfer. |
1088 | For docs see target.h, to_xfer_partial. */ | |
cf7a04e8 | 1089 | |
9b409511 | 1090 | static enum target_xfer_status |
f0ba3972 | 1091 | memory_xfer_partial_1 (struct target_ops *ops, enum target_object object, |
17fde6d0 | 1092 | gdb_byte *readbuf, const gdb_byte *writebuf, ULONGEST memaddr, |
9b409511 | 1093 | ULONGEST len, ULONGEST *xfered_len) |
0779438d | 1094 | { |
9b409511 | 1095 | enum target_xfer_status res; |
0fec99e8 | 1096 | ULONGEST reg_len; |
cf7a04e8 | 1097 | struct mem_region *region; |
4e5d721f | 1098 | struct inferior *inf; |
cf7a04e8 | 1099 | |
07b82ea5 PA |
1100 | /* For accesses to unmapped overlay sections, read directly from |
1101 | files. Must do this first, as MEMADDR may need adjustment. */ | |
1102 | if (readbuf != NULL && overlay_debugging) | |
1103 | { | |
1104 | struct obj_section *section = find_pc_overlay (memaddr); | |
5d502164 | 1105 | |
07b82ea5 PA |
1106 | if (pc_in_unmapped_range (memaddr, section)) |
1107 | { | |
1108 | struct target_section_table *table | |
1109 | = target_get_section_table (ops); | |
1110 | const char *section_name = section->the_bfd_section->name; | |
5d502164 | 1111 | |
07b82ea5 PA |
1112 | memaddr = overlay_mapped_address (memaddr, section); |
1113 | return section_table_xfer_memory_partial (readbuf, writebuf, | |
9b409511 | 1114 | memaddr, len, xfered_len, |
07b82ea5 PA |
1115 | table->sections, |
1116 | table->sections_end, | |
1117 | section_name); | |
1118 | } | |
1119 | } | |
1120 | ||
1121 | /* Try the executable files, if "trust-readonly-sections" is set. */ | |
cf7a04e8 DJ |
1122 | if (readbuf != NULL && trust_readonly) |
1123 | { | |
0542c86d | 1124 | struct target_section *secp; |
07b82ea5 | 1125 | struct target_section_table *table; |
cf7a04e8 DJ |
1126 | |
1127 | secp = target_section_by_addr (ops, memaddr); | |
1128 | if (secp != NULL | |
2b2848e2 DE |
1129 | && (bfd_get_section_flags (secp->the_bfd_section->owner, |
1130 | secp->the_bfd_section) | |
cf7a04e8 | 1131 | & SEC_READONLY)) |
07b82ea5 PA |
1132 | { |
1133 | table = target_get_section_table (ops); | |
1134 | return section_table_xfer_memory_partial (readbuf, writebuf, | |
9b409511 | 1135 | memaddr, len, xfered_len, |
07b82ea5 PA |
1136 | table->sections, |
1137 | table->sections_end, | |
1138 | NULL); | |
1139 | } | |
98646950 UW |
1140 | } |
1141 | ||
cf7a04e8 | 1142 | /* Try GDB's internal data cache. */ |
cf7a04e8 | 1143 | |
0fec99e8 PA |
1144 | if (!memory_xfer_check_region (readbuf, writebuf, memaddr, len, ®_len, |
1145 | ®ion)) | |
1146 | return TARGET_XFER_E_IO; | |
cf7a04e8 | 1147 | |
6c95b8df | 1148 | if (!ptid_equal (inferior_ptid, null_ptid)) |
c9657e70 | 1149 | inf = find_inferior_ptid (inferior_ptid); |
6c95b8df PA |
1150 | else |
1151 | inf = NULL; | |
4e5d721f DE |
1152 | |
1153 | if (inf != NULL | |
0f26cec1 | 1154 | && readbuf != NULL |
2f4d8875 PA |
1155 | /* The dcache reads whole cache lines; that doesn't play well |
1156 | with reading from a trace buffer, because reading outside of | |
1157 | the collected memory range fails. */ | |
1158 | && get_traceframe_number () == -1 | |
4e5d721f | 1159 | && (region->attrib.cache |
29453a14 YQ |
1160 | || (stack_cache_enabled_p () && object == TARGET_OBJECT_STACK_MEMORY) |
1161 | || (code_cache_enabled_p () && object == TARGET_OBJECT_CODE_MEMORY))) | |
cf7a04e8 | 1162 | { |
2a2f9fe4 YQ |
1163 | DCACHE *dcache = target_dcache_get_or_init (); |
1164 | ||
0f26cec1 PA |
1165 | return dcache_read_memory_partial (ops, dcache, memaddr, readbuf, |
1166 | reg_len, xfered_len); | |
cf7a04e8 DJ |
1167 | } |
1168 | ||
1169 | /* If none of those methods found the memory we wanted, fall back | |
1170 | to a target partial transfer. Normally a single call to | |
1171 | to_xfer_partial is enough; if it doesn't recognize an object | |
1172 | it will call the to_xfer_partial of the next target down. | |
1173 | But for memory this won't do. Memory is the only target | |
9b409511 YQ |
1174 | object which can be read from more than one valid target. |
1175 | A core file, for instance, could have some of memory but | |
1176 | delegate other bits to the target below it. So, we must | |
1177 | manually try all targets. */ | |
1178 | ||
1179 | res = raw_memory_xfer_partial (ops, readbuf, writebuf, memaddr, reg_len, | |
1180 | xfered_len); | |
cf7a04e8 DJ |
1181 | |
1182 | /* If we still haven't got anything, return the last error. We | |
1183 | give up. */ | |
1184 | return res; | |
0779438d AC |
1185 | } |
1186 | ||
f0ba3972 PA |
1187 | /* Perform a partial memory transfer. For docs see target.h, |
1188 | to_xfer_partial. */ | |
1189 | ||
9b409511 | 1190 | static enum target_xfer_status |
f0ba3972 | 1191 | memory_xfer_partial (struct target_ops *ops, enum target_object object, |
9b409511 YQ |
1192 | gdb_byte *readbuf, const gdb_byte *writebuf, |
1193 | ULONGEST memaddr, ULONGEST len, ULONGEST *xfered_len) | |
f0ba3972 | 1194 | { |
9b409511 | 1195 | enum target_xfer_status res; |
f0ba3972 PA |
1196 | |
1197 | /* Zero length requests are ok and require no work. */ | |
1198 | if (len == 0) | |
9b409511 | 1199 | return TARGET_XFER_EOF; |
f0ba3972 | 1200 | |
a738ea1d YQ |
1201 | memaddr = address_significant (target_gdbarch (), memaddr); |
1202 | ||
f0ba3972 PA |
1203 | /* Fill in READBUF with breakpoint shadows, or WRITEBUF with |
1204 | breakpoint insns, thus hiding out from higher layers whether | |
1205 | there are software breakpoints inserted in the code stream. */ | |
1206 | if (readbuf != NULL) | |
1207 | { | |
9b409511 YQ |
1208 | res = memory_xfer_partial_1 (ops, object, readbuf, NULL, memaddr, len, |
1209 | xfered_len); | |
f0ba3972 | 1210 | |
9b409511 | 1211 | if (res == TARGET_XFER_OK && !show_memory_breakpoints) |
c63528fc | 1212 | breakpoint_xfer_memory (readbuf, NULL, NULL, memaddr, *xfered_len); |
f0ba3972 PA |
1213 | } |
1214 | else | |
1215 | { | |
67c059c2 AB |
1216 | /* A large write request is likely to be partially satisfied |
1217 | by memory_xfer_partial_1. We will continually malloc | |
1218 | and free a copy of the entire write request for breakpoint | |
1219 | shadow handling even though we only end up writing a small | |
09c98b44 DB |
1220 | subset of it. Cap writes to a limit specified by the target |
1221 | to mitigate this. */ | |
f6ac5f3d | 1222 | len = std::min (ops->get_memory_xfer_limit (), len); |
67c059c2 | 1223 | |
26fcd5d7 TT |
1224 | gdb::byte_vector buf (writebuf, writebuf + len); |
1225 | breakpoint_xfer_memory (NULL, buf.data (), writebuf, memaddr, len); | |
1226 | res = memory_xfer_partial_1 (ops, object, NULL, buf.data (), memaddr, len, | |
9b409511 | 1227 | xfered_len); |
f0ba3972 PA |
1228 | } |
1229 | ||
1230 | return res; | |
1231 | } | |
1232 | ||
cb85b21b TT |
1233 | scoped_restore_tmpl<int> |
1234 | make_scoped_restore_show_memory_breakpoints (int show) | |
8defab1a | 1235 | { |
cb85b21b | 1236 | return make_scoped_restore (&show_memory_breakpoints, show); |
8defab1a DJ |
1237 | } |
1238 | ||
7f79c47e DE |
1239 | /* For docs see target.h, to_xfer_partial. */ |
1240 | ||
9b409511 | 1241 | enum target_xfer_status |
27394598 AC |
1242 | target_xfer_partial (struct target_ops *ops, |
1243 | enum target_object object, const char *annex, | |
4ac248ca | 1244 | gdb_byte *readbuf, const gdb_byte *writebuf, |
9b409511 YQ |
1245 | ULONGEST offset, ULONGEST len, |
1246 | ULONGEST *xfered_len) | |
27394598 | 1247 | { |
9b409511 | 1248 | enum target_xfer_status retval; |
27394598 | 1249 | |
ce6d0892 YQ |
1250 | /* Transfer is done when LEN is zero. */ |
1251 | if (len == 0) | |
9b409511 | 1252 | return TARGET_XFER_EOF; |
ce6d0892 | 1253 | |
d914c394 SS |
1254 | if (writebuf && !may_write_memory) |
1255 | error (_("Writing to memory is not allowed (addr %s, len %s)"), | |
1256 | core_addr_to_string_nz (offset), plongest (len)); | |
1257 | ||
9b409511 YQ |
1258 | *xfered_len = 0; |
1259 | ||
cf7a04e8 DJ |
1260 | /* If this is a memory transfer, let the memory-specific code |
1261 | have a look at it instead. Memory transfers are more | |
1262 | complicated. */ | |
29453a14 YQ |
1263 | if (object == TARGET_OBJECT_MEMORY || object == TARGET_OBJECT_STACK_MEMORY |
1264 | || object == TARGET_OBJECT_CODE_MEMORY) | |
4e5d721f | 1265 | retval = memory_xfer_partial (ops, object, readbuf, |
9b409511 | 1266 | writebuf, offset, len, xfered_len); |
9f713294 | 1267 | else if (object == TARGET_OBJECT_RAW_MEMORY) |
cf7a04e8 | 1268 | { |
0fec99e8 PA |
1269 | /* Skip/avoid accessing the target if the memory region |
1270 | attributes block the access. Check this here instead of in | |
1271 | raw_memory_xfer_partial as otherwise we'd end up checking | |
1272 | this twice in the case of the memory_xfer_partial path is | |
1273 | taken; once before checking the dcache, and another in the | |
1274 | tail call to raw_memory_xfer_partial. */ | |
1275 | if (!memory_xfer_check_region (readbuf, writebuf, offset, len, &len, | |
1276 | NULL)) | |
1277 | return TARGET_XFER_E_IO; | |
1278 | ||
9f713294 | 1279 | /* Request the normal memory object from other layers. */ |
9b409511 YQ |
1280 | retval = raw_memory_xfer_partial (ops, readbuf, writebuf, offset, len, |
1281 | xfered_len); | |
cf7a04e8 | 1282 | } |
9f713294 | 1283 | else |
f6ac5f3d PA |
1284 | retval = ops->xfer_partial (object, annex, readbuf, |
1285 | writebuf, offset, len, xfered_len); | |
cf7a04e8 | 1286 | |
27394598 AC |
1287 | if (targetdebug) |
1288 | { | |
1289 | const unsigned char *myaddr = NULL; | |
1290 | ||
1291 | fprintf_unfiltered (gdb_stdlog, | |
3e43a32a | 1292 | "%s:target_xfer_partial " |
9b409511 | 1293 | "(%d, %s, %s, %s, %s, %s) = %d, %s", |
f6ac5f3d | 1294 | ops->shortname (), |
27394598 AC |
1295 | (int) object, |
1296 | (annex ? annex : "(null)"), | |
53b71562 JB |
1297 | host_address_to_string (readbuf), |
1298 | host_address_to_string (writebuf), | |
0b1553bc | 1299 | core_addr_to_string_nz (offset), |
9b409511 YQ |
1300 | pulongest (len), retval, |
1301 | pulongest (*xfered_len)); | |
27394598 AC |
1302 | |
1303 | if (readbuf) | |
1304 | myaddr = readbuf; | |
1305 | if (writebuf) | |
1306 | myaddr = writebuf; | |
9b409511 | 1307 | if (retval == TARGET_XFER_OK && myaddr != NULL) |
27394598 AC |
1308 | { |
1309 | int i; | |
2bc416ba | 1310 | |
27394598 | 1311 | fputs_unfiltered (", bytes =", gdb_stdlog); |
9b409511 | 1312 | for (i = 0; i < *xfered_len; i++) |
27394598 | 1313 | { |
53b71562 | 1314 | if ((((intptr_t) &(myaddr[i])) & 0xf) == 0) |
27394598 AC |
1315 | { |
1316 | if (targetdebug < 2 && i > 0) | |
1317 | { | |
1318 | fprintf_unfiltered (gdb_stdlog, " ..."); | |
1319 | break; | |
1320 | } | |
1321 | fprintf_unfiltered (gdb_stdlog, "\n"); | |
1322 | } | |
2bc416ba | 1323 | |
27394598 AC |
1324 | fprintf_unfiltered (gdb_stdlog, " %02x", myaddr[i] & 0xff); |
1325 | } | |
1326 | } | |
2bc416ba | 1327 | |
27394598 AC |
1328 | fputc_unfiltered ('\n', gdb_stdlog); |
1329 | } | |
9b409511 YQ |
1330 | |
1331 | /* Check implementations of to_xfer_partial update *XFERED_LEN | |
1332 | properly. Do assertion after printing debug messages, so that we | |
1333 | can find more clues on assertion failure from debugging messages. */ | |
bc113b4e | 1334 | if (retval == TARGET_XFER_OK || retval == TARGET_XFER_UNAVAILABLE) |
9b409511 YQ |
1335 | gdb_assert (*xfered_len > 0); |
1336 | ||
27394598 AC |
1337 | return retval; |
1338 | } | |
1339 | ||
578d3588 PA |
1340 | /* Read LEN bytes of target memory at address MEMADDR, placing the |
1341 | results in GDB's memory at MYADDR. Returns either 0 for success or | |
d09f2c3f | 1342 | -1 if any error occurs. |
c906108c SS |
1343 | |
1344 | If an error occurs, no guarantee is made about the contents of the data at | |
1345 | MYADDR. In particular, the caller should not depend upon partial reads | |
1346 | filling the buffer with good data. There is no way for the caller to know | |
1347 | how much good data might have been transfered anyway. Callers that can | |
cf7a04e8 | 1348 | deal with partial reads should call target_read (which will retry until |
c378eb4e | 1349 | it makes no progress, and then return how much was transferred). */ |
c906108c SS |
1350 | |
1351 | int | |
1b162304 | 1352 | target_read_memory (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len) |
c906108c | 1353 | { |
8b88a78e | 1354 | if (target_read (current_top_target (), TARGET_OBJECT_MEMORY, NULL, |
cf7a04e8 DJ |
1355 | myaddr, memaddr, len) == len) |
1356 | return 0; | |
0779438d | 1357 | else |
d09f2c3f | 1358 | return -1; |
c906108c SS |
1359 | } |
1360 | ||
721ec300 GB |
1361 | /* See target/target.h. */ |
1362 | ||
1363 | int | |
1364 | target_read_uint32 (CORE_ADDR memaddr, uint32_t *result) | |
1365 | { | |
1366 | gdb_byte buf[4]; | |
1367 | int r; | |
1368 | ||
1369 | r = target_read_memory (memaddr, buf, sizeof buf); | |
1370 | if (r != 0) | |
1371 | return r; | |
1372 | *result = extract_unsigned_integer (buf, sizeof buf, | |
1373 | gdbarch_byte_order (target_gdbarch ())); | |
1374 | return 0; | |
1375 | } | |
1376 | ||
aee4bf85 PA |
1377 | /* Like target_read_memory, but specify explicitly that this is a read |
1378 | from the target's raw memory. That is, this read bypasses the | |
1379 | dcache, breakpoint shadowing, etc. */ | |
1380 | ||
1381 | int | |
1382 | target_read_raw_memory (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len) | |
1383 | { | |
8b88a78e | 1384 | if (target_read (current_top_target (), TARGET_OBJECT_RAW_MEMORY, NULL, |
aee4bf85 PA |
1385 | myaddr, memaddr, len) == len) |
1386 | return 0; | |
1387 | else | |
d09f2c3f | 1388 | return -1; |
aee4bf85 PA |
1389 | } |
1390 | ||
4e5d721f DE |
1391 | /* Like target_read_memory, but specify explicitly that this is a read from |
1392 | the target's stack. This may trigger different cache behavior. */ | |
1393 | ||
1394 | int | |
45aa4659 | 1395 | target_read_stack (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len) |
4e5d721f | 1396 | { |
8b88a78e | 1397 | if (target_read (current_top_target (), TARGET_OBJECT_STACK_MEMORY, NULL, |
4e5d721f DE |
1398 | myaddr, memaddr, len) == len) |
1399 | return 0; | |
1400 | else | |
d09f2c3f | 1401 | return -1; |
4e5d721f DE |
1402 | } |
1403 | ||
29453a14 YQ |
1404 | /* Like target_read_memory, but specify explicitly that this is a read from |
1405 | the target's code. This may trigger different cache behavior. */ | |
1406 | ||
1407 | int | |
1408 | target_read_code (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len) | |
1409 | { | |
8b88a78e | 1410 | if (target_read (current_top_target (), TARGET_OBJECT_CODE_MEMORY, NULL, |
29453a14 YQ |
1411 | myaddr, memaddr, len) == len) |
1412 | return 0; | |
1413 | else | |
d09f2c3f | 1414 | return -1; |
29453a14 YQ |
1415 | } |
1416 | ||
7f79c47e | 1417 | /* Write LEN bytes from MYADDR to target memory at address MEMADDR. |
d09f2c3f PA |
1418 | Returns either 0 for success or -1 if any error occurs. If an |
1419 | error occurs, no guarantee is made about how much data got written. | |
1420 | Callers that can deal with partial writes should call | |
1421 | target_write. */ | |
7f79c47e | 1422 | |
c906108c | 1423 | int |
45aa4659 | 1424 | target_write_memory (CORE_ADDR memaddr, const gdb_byte *myaddr, ssize_t len) |
c906108c | 1425 | { |
8b88a78e | 1426 | if (target_write (current_top_target (), TARGET_OBJECT_MEMORY, NULL, |
cf7a04e8 DJ |
1427 | myaddr, memaddr, len) == len) |
1428 | return 0; | |
0779438d | 1429 | else |
d09f2c3f | 1430 | return -1; |
c906108c | 1431 | } |
c5aa993b | 1432 | |
f0ba3972 | 1433 | /* Write LEN bytes from MYADDR to target raw memory at address |
d09f2c3f PA |
1434 | MEMADDR. Returns either 0 for success or -1 if any error occurs. |
1435 | If an error occurs, no guarantee is made about how much data got | |
1436 | written. Callers that can deal with partial writes should call | |
1437 | target_write. */ | |
f0ba3972 PA |
1438 | |
1439 | int | |
45aa4659 | 1440 | target_write_raw_memory (CORE_ADDR memaddr, const gdb_byte *myaddr, ssize_t len) |
f0ba3972 | 1441 | { |
8b88a78e | 1442 | if (target_write (current_top_target (), TARGET_OBJECT_RAW_MEMORY, NULL, |
f0ba3972 PA |
1443 | myaddr, memaddr, len) == len) |
1444 | return 0; | |
1445 | else | |
d09f2c3f | 1446 | return -1; |
f0ba3972 PA |
1447 | } |
1448 | ||
fd79ecee DJ |
1449 | /* Fetch the target's memory map. */ |
1450 | ||
a664f67e | 1451 | std::vector<mem_region> |
fd79ecee DJ |
1452 | target_memory_map (void) |
1453 | { | |
8b88a78e | 1454 | std::vector<mem_region> result = current_top_target ()->memory_map (); |
a664f67e SM |
1455 | if (result.empty ()) |
1456 | return result; | |
fd79ecee | 1457 | |
a664f67e | 1458 | std::sort (result.begin (), result.end ()); |
fd79ecee DJ |
1459 | |
1460 | /* Check that regions do not overlap. Simultaneously assign | |
1461 | a numbering for the "mem" commands to use to refer to | |
1462 | each region. */ | |
a664f67e SM |
1463 | mem_region *last_one = NULL; |
1464 | for (size_t ix = 0; ix < result.size (); ix++) | |
fd79ecee | 1465 | { |
a664f67e | 1466 | mem_region *this_one = &result[ix]; |
fd79ecee DJ |
1467 | this_one->number = ix; |
1468 | ||
a664f67e | 1469 | if (last_one != NULL && last_one->hi > this_one->lo) |
fd79ecee DJ |
1470 | { |
1471 | warning (_("Overlapping regions in memory map: ignoring")); | |
a664f67e | 1472 | return std::vector<mem_region> (); |
fd79ecee | 1473 | } |
a664f67e | 1474 | |
fd79ecee DJ |
1475 | last_one = this_one; |
1476 | } | |
1477 | ||
1478 | return result; | |
1479 | } | |
1480 | ||
a76d924d DJ |
1481 | void |
1482 | target_flash_erase (ULONGEST address, LONGEST length) | |
1483 | { | |
8b88a78e | 1484 | current_top_target ()->flash_erase (address, length); |
a76d924d DJ |
1485 | } |
1486 | ||
1487 | void | |
1488 | target_flash_done (void) | |
1489 | { | |
8b88a78e | 1490 | current_top_target ()->flash_done (); |
a76d924d DJ |
1491 | } |
1492 | ||
920d2a44 AC |
1493 | static void |
1494 | show_trust_readonly (struct ui_file *file, int from_tty, | |
1495 | struct cmd_list_element *c, const char *value) | |
1496 | { | |
3e43a32a MS |
1497 | fprintf_filtered (file, |
1498 | _("Mode for reading from readonly sections is %s.\n"), | |
920d2a44 AC |
1499 | value); |
1500 | } | |
3a11626d | 1501 | |
7f79c47e | 1502 | /* Target vector read/write partial wrapper functions. */ |
0088c768 | 1503 | |
9b409511 | 1504 | static enum target_xfer_status |
1e3ff5ad AC |
1505 | target_read_partial (struct target_ops *ops, |
1506 | enum target_object object, | |
1b0ba102 | 1507 | const char *annex, gdb_byte *buf, |
9b409511 YQ |
1508 | ULONGEST offset, ULONGEST len, |
1509 | ULONGEST *xfered_len) | |
1e3ff5ad | 1510 | { |
9b409511 YQ |
1511 | return target_xfer_partial (ops, object, annex, buf, NULL, offset, len, |
1512 | xfered_len); | |
1e3ff5ad AC |
1513 | } |
1514 | ||
8a55ffb0 | 1515 | static enum target_xfer_status |
1e3ff5ad AC |
1516 | target_write_partial (struct target_ops *ops, |
1517 | enum target_object object, | |
1b0ba102 | 1518 | const char *annex, const gdb_byte *buf, |
9b409511 | 1519 | ULONGEST offset, LONGEST len, ULONGEST *xfered_len) |
1e3ff5ad | 1520 | { |
9b409511 YQ |
1521 | return target_xfer_partial (ops, object, annex, NULL, buf, offset, len, |
1522 | xfered_len); | |
1e3ff5ad AC |
1523 | } |
1524 | ||
1525 | /* Wrappers to perform the full transfer. */ | |
7f79c47e DE |
1526 | |
1527 | /* For docs on target_read see target.h. */ | |
1528 | ||
1e3ff5ad AC |
1529 | LONGEST |
1530 | target_read (struct target_ops *ops, | |
1531 | enum target_object object, | |
1b0ba102 | 1532 | const char *annex, gdb_byte *buf, |
1e3ff5ad AC |
1533 | ULONGEST offset, LONGEST len) |
1534 | { | |
279a6fed | 1535 | LONGEST xfered_total = 0; |
d309493c SM |
1536 | int unit_size = 1; |
1537 | ||
1538 | /* If we are reading from a memory object, find the length of an addressable | |
1539 | unit for that architecture. */ | |
1540 | if (object == TARGET_OBJECT_MEMORY | |
1541 | || object == TARGET_OBJECT_STACK_MEMORY | |
1542 | || object == TARGET_OBJECT_CODE_MEMORY | |
1543 | || object == TARGET_OBJECT_RAW_MEMORY) | |
1544 | unit_size = gdbarch_addressable_memory_unit_size (target_gdbarch ()); | |
5d502164 | 1545 | |
279a6fed | 1546 | while (xfered_total < len) |
1e3ff5ad | 1547 | { |
279a6fed | 1548 | ULONGEST xfered_partial; |
9b409511 YQ |
1549 | enum target_xfer_status status; |
1550 | ||
1551 | status = target_read_partial (ops, object, annex, | |
d309493c | 1552 | buf + xfered_total * unit_size, |
279a6fed SM |
1553 | offset + xfered_total, len - xfered_total, |
1554 | &xfered_partial); | |
5d502164 | 1555 | |
1e3ff5ad | 1556 | /* Call an observer, notifying them of the xfer progress? */ |
9b409511 | 1557 | if (status == TARGET_XFER_EOF) |
279a6fed | 1558 | return xfered_total; |
9b409511 YQ |
1559 | else if (status == TARGET_XFER_OK) |
1560 | { | |
279a6fed | 1561 | xfered_total += xfered_partial; |
9b409511 YQ |
1562 | QUIT; |
1563 | } | |
1564 | else | |
279a6fed | 1565 | return TARGET_XFER_E_IO; |
9b409511 | 1566 | |
1e3ff5ad AC |
1567 | } |
1568 | return len; | |
1569 | } | |
1570 | ||
f1a507a1 JB |
1571 | /* Assuming that the entire [begin, end) range of memory cannot be |
1572 | read, try to read whatever subrange is possible to read. | |
1573 | ||
1574 | The function returns, in RESULT, either zero or one memory block. | |
1575 | If there's a readable subrange at the beginning, it is completely | |
1576 | read and returned. Any further readable subrange will not be read. | |
1577 | Otherwise, if there's a readable subrange at the end, it will be | |
1578 | completely read and returned. Any readable subranges before it | |
1579 | (obviously, not starting at the beginning), will be ignored. In | |
1580 | other cases -- either no readable subrange, or readable subrange(s) | |
1581 | that is neither at the beginning, or end, nothing is returned. | |
1582 | ||
1583 | The purpose of this function is to handle a read across a boundary | |
1584 | of accessible memory in a case when memory map is not available. | |
1585 | The above restrictions are fine for this case, but will give | |
1586 | incorrect results if the memory is 'patchy'. However, supporting | |
1587 | 'patchy' memory would require trying to read every single byte, | |
1588 | and it seems unacceptable solution. Explicit memory map is | |
1589 | recommended for this case -- and target_read_memory_robust will | |
1590 | take care of reading multiple ranges then. */ | |
8dedea02 VP |
1591 | |
1592 | static void | |
3e43a32a | 1593 | read_whatever_is_readable (struct target_ops *ops, |
279a6fed | 1594 | const ULONGEST begin, const ULONGEST end, |
d309493c | 1595 | int unit_size, |
386c8614 | 1596 | std::vector<memory_read_result> *result) |
d5086790 | 1597 | { |
8dedea02 VP |
1598 | ULONGEST current_begin = begin; |
1599 | ULONGEST current_end = end; | |
1600 | int forward; | |
9b409511 | 1601 | ULONGEST xfered_len; |
8dedea02 VP |
1602 | |
1603 | /* If we previously failed to read 1 byte, nothing can be done here. */ | |
1604 | if (end - begin <= 1) | |
386c8614 TT |
1605 | return; |
1606 | ||
1607 | gdb::unique_xmalloc_ptr<gdb_byte> buf ((gdb_byte *) xmalloc (end - begin)); | |
8dedea02 VP |
1608 | |
1609 | /* Check that either first or the last byte is readable, and give up | |
c378eb4e | 1610 | if not. This heuristic is meant to permit reading accessible memory |
8dedea02 VP |
1611 | at the boundary of accessible region. */ |
1612 | if (target_read_partial (ops, TARGET_OBJECT_MEMORY, NULL, | |
386c8614 | 1613 | buf.get (), begin, 1, &xfered_len) == TARGET_XFER_OK) |
8dedea02 VP |
1614 | { |
1615 | forward = 1; | |
1616 | ++current_begin; | |
1617 | } | |
1618 | else if (target_read_partial (ops, TARGET_OBJECT_MEMORY, NULL, | |
386c8614 | 1619 | buf.get () + (end - begin) - 1, end - 1, 1, |
9b409511 | 1620 | &xfered_len) == TARGET_XFER_OK) |
8dedea02 VP |
1621 | { |
1622 | forward = 0; | |
1623 | --current_end; | |
1624 | } | |
1625 | else | |
386c8614 | 1626 | return; |
8dedea02 VP |
1627 | |
1628 | /* Loop invariant is that the [current_begin, current_end) was previously | |
1629 | found to be not readable as a whole. | |
1630 | ||
1631 | Note loop condition -- if the range has 1 byte, we can't divide the range | |
1632 | so there's no point trying further. */ | |
1633 | while (current_end - current_begin > 1) | |
1634 | { | |
1635 | ULONGEST first_half_begin, first_half_end; | |
1636 | ULONGEST second_half_begin, second_half_end; | |
1637 | LONGEST xfer; | |
279a6fed | 1638 | ULONGEST middle = current_begin + (current_end - current_begin) / 2; |
f1a507a1 | 1639 | |
8dedea02 VP |
1640 | if (forward) |
1641 | { | |
1642 | first_half_begin = current_begin; | |
1643 | first_half_end = middle; | |
1644 | second_half_begin = middle; | |
1645 | second_half_end = current_end; | |
1646 | } | |
1647 | else | |
1648 | { | |
1649 | first_half_begin = middle; | |
1650 | first_half_end = current_end; | |
1651 | second_half_begin = current_begin; | |
1652 | second_half_end = middle; | |
1653 | } | |
1654 | ||
1655 | xfer = target_read (ops, TARGET_OBJECT_MEMORY, NULL, | |
386c8614 | 1656 | buf.get () + (first_half_begin - begin) * unit_size, |
8dedea02 VP |
1657 | first_half_begin, |
1658 | first_half_end - first_half_begin); | |
1659 | ||
1660 | if (xfer == first_half_end - first_half_begin) | |
1661 | { | |
c378eb4e | 1662 | /* This half reads up fine. So, the error must be in the |
3e43a32a | 1663 | other half. */ |
8dedea02 VP |
1664 | current_begin = second_half_begin; |
1665 | current_end = second_half_end; | |
1666 | } | |
1667 | else | |
1668 | { | |
c378eb4e | 1669 | /* This half is not readable. Because we've tried one byte, we |
279a6fed | 1670 | know some part of this half if actually readable. Go to the next |
8dedea02 VP |
1671 | iteration to divide again and try to read. |
1672 | ||
1673 | We don't handle the other half, because this function only tries | |
1674 | to read a single readable subrange. */ | |
1675 | current_begin = first_half_begin; | |
1676 | current_end = first_half_end; | |
1677 | } | |
1678 | } | |
1679 | ||
1680 | if (forward) | |
1681 | { | |
1682 | /* The [begin, current_begin) range has been read. */ | |
386c8614 | 1683 | result->emplace_back (begin, current_end, std::move (buf)); |
8dedea02 VP |
1684 | } |
1685 | else | |
1686 | { | |
1687 | /* The [current_end, end) range has been read. */ | |
279a6fed | 1688 | LONGEST region_len = end - current_end; |
f1a507a1 | 1689 | |
386c8614 TT |
1690 | gdb::unique_xmalloc_ptr<gdb_byte> data |
1691 | ((gdb_byte *) xmalloc (region_len * unit_size)); | |
1692 | memcpy (data.get (), buf.get () + (current_end - begin) * unit_size, | |
d309493c | 1693 | region_len * unit_size); |
386c8614 | 1694 | result->emplace_back (current_end, end, std::move (data)); |
8dedea02 | 1695 | } |
8dedea02 VP |
1696 | } |
1697 | ||
386c8614 | 1698 | std::vector<memory_read_result> |
279a6fed SM |
1699 | read_memory_robust (struct target_ops *ops, |
1700 | const ULONGEST offset, const LONGEST len) | |
8dedea02 | 1701 | { |
386c8614 | 1702 | std::vector<memory_read_result> result; |
d309493c | 1703 | int unit_size = gdbarch_addressable_memory_unit_size (target_gdbarch ()); |
8dedea02 | 1704 | |
279a6fed SM |
1705 | LONGEST xfered_total = 0; |
1706 | while (xfered_total < len) | |
d5086790 | 1707 | { |
279a6fed SM |
1708 | struct mem_region *region = lookup_mem_region (offset + xfered_total); |
1709 | LONGEST region_len; | |
5d502164 | 1710 | |
8dedea02 VP |
1711 | /* If there is no explicit region, a fake one should be created. */ |
1712 | gdb_assert (region); | |
1713 | ||
1714 | if (region->hi == 0) | |
279a6fed | 1715 | region_len = len - xfered_total; |
8dedea02 | 1716 | else |
279a6fed | 1717 | region_len = region->hi - offset; |
8dedea02 VP |
1718 | |
1719 | if (region->attrib.mode == MEM_NONE || region->attrib.mode == MEM_WO) | |
d5086790 | 1720 | { |
c378eb4e | 1721 | /* Cannot read this region. Note that we can end up here only |
8dedea02 VP |
1722 | if the region is explicitly marked inaccessible, or |
1723 | 'inaccessible-by-default' is in effect. */ | |
279a6fed | 1724 | xfered_total += region_len; |
8dedea02 VP |
1725 | } |
1726 | else | |
1727 | { | |
325fac50 | 1728 | LONGEST to_read = std::min (len - xfered_total, region_len); |
386c8614 TT |
1729 | gdb::unique_xmalloc_ptr<gdb_byte> buffer |
1730 | ((gdb_byte *) xmalloc (to_read * unit_size)); | |
8dedea02 | 1731 | |
279a6fed | 1732 | LONGEST xfered_partial = |
386c8614 | 1733 | target_read (ops, TARGET_OBJECT_MEMORY, NULL, buffer.get (), |
279a6fed | 1734 | offset + xfered_total, to_read); |
8dedea02 | 1735 | /* Call an observer, notifying them of the xfer progress? */ |
279a6fed | 1736 | if (xfered_partial <= 0) |
d5086790 | 1737 | { |
c378eb4e | 1738 | /* Got an error reading full chunk. See if maybe we can read |
8dedea02 | 1739 | some subrange. */ |
e084c964 DB |
1740 | read_whatever_is_readable (ops, offset + xfered_total, |
1741 | offset + xfered_total + to_read, | |
1742 | unit_size, &result); | |
279a6fed | 1743 | xfered_total += to_read; |
d5086790 | 1744 | } |
8dedea02 VP |
1745 | else |
1746 | { | |
386c8614 TT |
1747 | result.emplace_back (offset + xfered_total, |
1748 | offset + xfered_total + xfered_partial, | |
1749 | std::move (buffer)); | |
279a6fed | 1750 | xfered_total += xfered_partial; |
8dedea02 VP |
1751 | } |
1752 | QUIT; | |
d5086790 | 1753 | } |
d5086790 | 1754 | } |
9d78f827 | 1755 | |
8dedea02 | 1756 | return result; |
d5086790 VP |
1757 | } |
1758 | ||
8dedea02 | 1759 | |
cf7a04e8 DJ |
1760 | /* An alternative to target_write with progress callbacks. */ |
1761 | ||
1e3ff5ad | 1762 | LONGEST |
cf7a04e8 DJ |
1763 | target_write_with_progress (struct target_ops *ops, |
1764 | enum target_object object, | |
1765 | const char *annex, const gdb_byte *buf, | |
1766 | ULONGEST offset, LONGEST len, | |
1767 | void (*progress) (ULONGEST, void *), void *baton) | |
1e3ff5ad | 1768 | { |
279a6fed | 1769 | LONGEST xfered_total = 0; |
d309493c SM |
1770 | int unit_size = 1; |
1771 | ||
1772 | /* If we are writing to a memory object, find the length of an addressable | |
1773 | unit for that architecture. */ | |
1774 | if (object == TARGET_OBJECT_MEMORY | |
1775 | || object == TARGET_OBJECT_STACK_MEMORY | |
1776 | || object == TARGET_OBJECT_CODE_MEMORY | |
1777 | || object == TARGET_OBJECT_RAW_MEMORY) | |
1778 | unit_size = gdbarch_addressable_memory_unit_size (target_gdbarch ()); | |
a76d924d DJ |
1779 | |
1780 | /* Give the progress callback a chance to set up. */ | |
1781 | if (progress) | |
1782 | (*progress) (0, baton); | |
1783 | ||
279a6fed | 1784 | while (xfered_total < len) |
1e3ff5ad | 1785 | { |
279a6fed | 1786 | ULONGEST xfered_partial; |
9b409511 YQ |
1787 | enum target_xfer_status status; |
1788 | ||
1789 | status = target_write_partial (ops, object, annex, | |
d309493c | 1790 | buf + xfered_total * unit_size, |
279a6fed SM |
1791 | offset + xfered_total, len - xfered_total, |
1792 | &xfered_partial); | |
cf7a04e8 | 1793 | |
5c328c05 | 1794 | if (status != TARGET_XFER_OK) |
279a6fed | 1795 | return status == TARGET_XFER_EOF ? xfered_total : TARGET_XFER_E_IO; |
cf7a04e8 DJ |
1796 | |
1797 | if (progress) | |
279a6fed | 1798 | (*progress) (xfered_partial, baton); |
cf7a04e8 | 1799 | |
279a6fed | 1800 | xfered_total += xfered_partial; |
1e3ff5ad AC |
1801 | QUIT; |
1802 | } | |
1803 | return len; | |
1804 | } | |
1805 | ||
7f79c47e DE |
1806 | /* For docs on target_write see target.h. */ |
1807 | ||
cf7a04e8 DJ |
1808 | LONGEST |
1809 | target_write (struct target_ops *ops, | |
1810 | enum target_object object, | |
1811 | const char *annex, const gdb_byte *buf, | |
1812 | ULONGEST offset, LONGEST len) | |
1813 | { | |
1814 | return target_write_with_progress (ops, object, annex, buf, offset, len, | |
1815 | NULL, NULL); | |
1816 | } | |
1817 | ||
9018be22 SM |
1818 | /* Help for target_read_alloc and target_read_stralloc. See their comments |
1819 | for details. */ | |
13547ab6 | 1820 | |
9018be22 SM |
1821 | template <typename T> |
1822 | gdb::optional<gdb::def_vector<T>> | |
159f81f3 | 1823 | target_read_alloc_1 (struct target_ops *ops, enum target_object object, |
9018be22 | 1824 | const char *annex) |
13547ab6 | 1825 | { |
9018be22 SM |
1826 | gdb::def_vector<T> buf; |
1827 | size_t buf_pos = 0; | |
1828 | const int chunk = 4096; | |
13547ab6 DJ |
1829 | |
1830 | /* This function does not have a length parameter; it reads the | |
1831 | entire OBJECT). Also, it doesn't support objects fetched partly | |
1832 | from one target and partly from another (in a different stratum, | |
1833 | e.g. a core file and an executable). Both reasons make it | |
1834 | unsuitable for reading memory. */ | |
1835 | gdb_assert (object != TARGET_OBJECT_MEMORY); | |
1836 | ||
1837 | /* Start by reading up to 4K at a time. The target will throttle | |
1838 | this number down if necessary. */ | |
13547ab6 DJ |
1839 | while (1) |
1840 | { | |
9b409511 YQ |
1841 | ULONGEST xfered_len; |
1842 | enum target_xfer_status status; | |
1843 | ||
9018be22 SM |
1844 | buf.resize (buf_pos + chunk); |
1845 | ||
1846 | status = target_read_partial (ops, object, annex, | |
1847 | (gdb_byte *) &buf[buf_pos], | |
1848 | buf_pos, chunk, | |
9b409511 YQ |
1849 | &xfered_len); |
1850 | ||
1851 | if (status == TARGET_XFER_EOF) | |
13547ab6 DJ |
1852 | { |
1853 | /* Read all there was. */ | |
9018be22 SM |
1854 | buf.resize (buf_pos); |
1855 | return buf; | |
13547ab6 | 1856 | } |
9b409511 YQ |
1857 | else if (status != TARGET_XFER_OK) |
1858 | { | |
1859 | /* An error occurred. */ | |
9018be22 | 1860 | return {}; |
9b409511 | 1861 | } |
13547ab6 | 1862 | |
9b409511 | 1863 | buf_pos += xfered_len; |
13547ab6 | 1864 | |
13547ab6 DJ |
1865 | QUIT; |
1866 | } | |
1867 | } | |
1868 | ||
9018be22 | 1869 | /* See target.h */ |
159f81f3 | 1870 | |
9018be22 | 1871 | gdb::optional<gdb::byte_vector> |
159f81f3 | 1872 | target_read_alloc (struct target_ops *ops, enum target_object object, |
9018be22 | 1873 | const char *annex) |
159f81f3 | 1874 | { |
9018be22 | 1875 | return target_read_alloc_1<gdb_byte> (ops, object, annex); |
159f81f3 DJ |
1876 | } |
1877 | ||
b7b030ad | 1878 | /* See target.h. */ |
159f81f3 | 1879 | |
9018be22 | 1880 | gdb::optional<gdb::char_vector> |
159f81f3 DJ |
1881 | target_read_stralloc (struct target_ops *ops, enum target_object object, |
1882 | const char *annex) | |
1883 | { | |
9018be22 SM |
1884 | gdb::optional<gdb::char_vector> buf |
1885 | = target_read_alloc_1<char> (ops, object, annex); | |
159f81f3 | 1886 | |
9018be22 SM |
1887 | if (!buf) |
1888 | return {}; | |
159f81f3 | 1889 | |
9018be22 SM |
1890 | if (buf->back () != '\0') |
1891 | buf->push_back ('\0'); | |
7313baad UW |
1892 | |
1893 | /* Check for embedded NUL bytes; but allow trailing NULs. */ | |
9018be22 SM |
1894 | for (auto it = std::find (buf->begin (), buf->end (), '\0'); |
1895 | it != buf->end (); it++) | |
1896 | if (*it != '\0') | |
7313baad UW |
1897 | { |
1898 | warning (_("target object %d, annex %s, " | |
1899 | "contained unexpected null characters"), | |
1900 | (int) object, annex ? annex : "(none)"); | |
1901 | break; | |
1902 | } | |
159f81f3 | 1903 | |
9018be22 | 1904 | return buf; |
159f81f3 DJ |
1905 | } |
1906 | ||
b6591e8b AC |
1907 | /* Memory transfer methods. */ |
1908 | ||
1909 | void | |
1b0ba102 | 1910 | get_target_memory (struct target_ops *ops, CORE_ADDR addr, gdb_byte *buf, |
b6591e8b AC |
1911 | LONGEST len) |
1912 | { | |
07b82ea5 PA |
1913 | /* This method is used to read from an alternate, non-current |
1914 | target. This read must bypass the overlay support (as symbols | |
1915 | don't match this target), and GDB's internal cache (wrong cache | |
1916 | for this target). */ | |
1917 | if (target_read (ops, TARGET_OBJECT_RAW_MEMORY, NULL, buf, addr, len) | |
b6591e8b | 1918 | != len) |
578d3588 | 1919 | memory_error (TARGET_XFER_E_IO, addr); |
b6591e8b AC |
1920 | } |
1921 | ||
1922 | ULONGEST | |
5d502164 MS |
1923 | get_target_memory_unsigned (struct target_ops *ops, CORE_ADDR addr, |
1924 | int len, enum bfd_endian byte_order) | |
b6591e8b | 1925 | { |
f6519ebc | 1926 | gdb_byte buf[sizeof (ULONGEST)]; |
b6591e8b AC |
1927 | |
1928 | gdb_assert (len <= sizeof (buf)); | |
1929 | get_target_memory (ops, addr, buf, len); | |
e17a4113 | 1930 | return extract_unsigned_integer (buf, len, byte_order); |
b6591e8b AC |
1931 | } |
1932 | ||
3db08215 MM |
1933 | /* See target.h. */ |
1934 | ||
d914c394 SS |
1935 | int |
1936 | target_insert_breakpoint (struct gdbarch *gdbarch, | |
1937 | struct bp_target_info *bp_tgt) | |
1938 | { | |
1939 | if (!may_insert_breakpoints) | |
1940 | { | |
1941 | warning (_("May not insert breakpoints")); | |
1942 | return 1; | |
1943 | } | |
1944 | ||
8b88a78e | 1945 | return current_top_target ()->insert_breakpoint (gdbarch, bp_tgt); |
d914c394 SS |
1946 | } |
1947 | ||
3db08215 MM |
1948 | /* See target.h. */ |
1949 | ||
d914c394 | 1950 | int |
6b84065d | 1951 | target_remove_breakpoint (struct gdbarch *gdbarch, |
73971819 PA |
1952 | struct bp_target_info *bp_tgt, |
1953 | enum remove_bp_reason reason) | |
d914c394 SS |
1954 | { |
1955 | /* This is kind of a weird case to handle, but the permission might | |
1956 | have been changed after breakpoints were inserted - in which case | |
1957 | we should just take the user literally and assume that any | |
1958 | breakpoints should be left in place. */ | |
1959 | if (!may_insert_breakpoints) | |
1960 | { | |
1961 | warning (_("May not remove breakpoints")); | |
1962 | return 1; | |
1963 | } | |
1964 | ||
8b88a78e | 1965 | return current_top_target ()->remove_breakpoint (gdbarch, bp_tgt, reason); |
d914c394 SS |
1966 | } |
1967 | ||
c906108c | 1968 | static void |
1d12d88f | 1969 | info_target_command (const char *args, int from_tty) |
c906108c SS |
1970 | { |
1971 | struct target_ops *t; | |
c906108c | 1972 | int has_all_mem = 0; |
c5aa993b | 1973 | |
c906108c | 1974 | if (symfile_objfile != NULL) |
4262abfb JK |
1975 | printf_unfiltered (_("Symbols from \"%s\".\n"), |
1976 | objfile_name (symfile_objfile)); | |
c906108c | 1977 | |
8b88a78e | 1978 | for (t = current_top_target (); t != NULL; t = t->beneath) |
c906108c | 1979 | { |
f6ac5f3d | 1980 | if (!t->has_memory ()) |
c906108c SS |
1981 | continue; |
1982 | ||
c5aa993b | 1983 | if ((int) (t->to_stratum) <= (int) dummy_stratum) |
c906108c SS |
1984 | continue; |
1985 | if (has_all_mem) | |
3e43a32a MS |
1986 | printf_unfiltered (_("\tWhile running this, " |
1987 | "GDB does not access memory from...\n")); | |
f6ac5f3d PA |
1988 | printf_unfiltered ("%s:\n", t->longname ()); |
1989 | t->files_info (); | |
1990 | has_all_mem = t->has_all_memory (); | |
c906108c SS |
1991 | } |
1992 | } | |
1993 | ||
fd79ecee DJ |
1994 | /* This function is called before any new inferior is created, e.g. |
1995 | by running a program, attaching, or connecting to a target. | |
1996 | It cleans up any state from previous invocations which might | |
1997 | change between runs. This is a subset of what target_preopen | |
1998 | resets (things which might change between targets). */ | |
1999 | ||
2000 | void | |
2001 | target_pre_inferior (int from_tty) | |
2002 | { | |
c378eb4e | 2003 | /* Clear out solib state. Otherwise the solib state of the previous |
b9db4ced | 2004 | inferior might have survived and is entirely wrong for the new |
c378eb4e | 2005 | target. This has been observed on GNU/Linux using glibc 2.3. How |
b9db4ced UW |
2006 | to reproduce: |
2007 | ||
2008 | bash$ ./foo& | |
2009 | [1] 4711 | |
2010 | bash$ ./foo& | |
2011 | [1] 4712 | |
2012 | bash$ gdb ./foo | |
2013 | [...] | |
2014 | (gdb) attach 4711 | |
2015 | (gdb) detach | |
2016 | (gdb) attach 4712 | |
2017 | Cannot access memory at address 0xdeadbeef | |
2018 | */ | |
b9db4ced | 2019 | |
50c71eaf PA |
2020 | /* In some OSs, the shared library list is the same/global/shared |
2021 | across inferiors. If code is shared between processes, so are | |
2022 | memory regions and features. */ | |
f5656ead | 2023 | if (!gdbarch_has_global_solist (target_gdbarch ())) |
50c71eaf PA |
2024 | { |
2025 | no_shared_libraries (NULL, from_tty); | |
2026 | ||
2027 | invalidate_target_mem_regions (); | |
424163ea | 2028 | |
50c71eaf PA |
2029 | target_clear_description (); |
2030 | } | |
8ffcbaaf | 2031 | |
e9756d52 PP |
2032 | /* attach_flag may be set if the previous process associated with |
2033 | the inferior was attached to. */ | |
2034 | current_inferior ()->attach_flag = 0; | |
2035 | ||
5d5658a1 PA |
2036 | current_inferior ()->highest_thread_num = 0; |
2037 | ||
8ffcbaaf | 2038 | agent_capability_invalidate (); |
fd79ecee DJ |
2039 | } |
2040 | ||
b8fa0bfa PA |
2041 | /* Callback for iterate_over_inferiors. Gets rid of the given |
2042 | inferior. */ | |
2043 | ||
2044 | static int | |
2045 | dispose_inferior (struct inferior *inf, void *args) | |
2046 | { | |
2047 | struct thread_info *thread; | |
2048 | ||
2049 | thread = any_thread_of_process (inf->pid); | |
2050 | if (thread) | |
2051 | { | |
2052 | switch_to_thread (thread->ptid); | |
2053 | ||
2054 | /* Core inferiors actually should be detached, not killed. */ | |
2055 | if (target_has_execution) | |
2056 | target_kill (); | |
2057 | else | |
6e1e1966 | 2058 | target_detach (inf, 0); |
b8fa0bfa PA |
2059 | } |
2060 | ||
2061 | return 0; | |
2062 | } | |
2063 | ||
c906108c SS |
2064 | /* This is to be called by the open routine before it does |
2065 | anything. */ | |
2066 | ||
2067 | void | |
fba45db2 | 2068 | target_preopen (int from_tty) |
c906108c | 2069 | { |
c5aa993b | 2070 | dont_repeat (); |
c906108c | 2071 | |
b8fa0bfa | 2072 | if (have_inferiors ()) |
c5aa993b | 2073 | { |
adf40b2e | 2074 | if (!from_tty |
b8fa0bfa PA |
2075 | || !have_live_inferiors () |
2076 | || query (_("A program is being debugged already. Kill it? "))) | |
2077 | iterate_over_inferiors (dispose_inferior, NULL); | |
c906108c | 2078 | else |
8a3fe4f8 | 2079 | error (_("Program not killed.")); |
c906108c SS |
2080 | } |
2081 | ||
2082 | /* Calling target_kill may remove the target from the stack. But if | |
2083 | it doesn't (which seems like a win for UDI), remove it now. */ | |
87ab71f0 PA |
2084 | /* Leave the exec target, though. The user may be switching from a |
2085 | live process to a core of the same program. */ | |
460014f5 | 2086 | pop_all_targets_above (file_stratum); |
fd79ecee DJ |
2087 | |
2088 | target_pre_inferior (from_tty); | |
c906108c SS |
2089 | } |
2090 | ||
6bd6f3b6 | 2091 | /* See target.h. */ |
c906108c SS |
2092 | |
2093 | void | |
6e1e1966 | 2094 | target_detach (inferior *inf, int from_tty) |
c906108c | 2095 | { |
6e1e1966 SM |
2096 | /* As long as some to_detach implementations rely on the current_inferior |
2097 | (either directly, or indirectly, like through target_gdbarch or by | |
2098 | reading memory), INF needs to be the current inferior. When that | |
2099 | requirement will become no longer true, then we can remove this | |
2100 | assertion. */ | |
2101 | gdb_assert (inf == current_inferior ()); | |
2102 | ||
f5656ead | 2103 | if (gdbarch_has_global_breakpoints (target_gdbarch ())) |
50c71eaf PA |
2104 | /* Don't remove global breakpoints here. They're removed on |
2105 | disconnection from the target. */ | |
2106 | ; | |
2107 | else | |
2108 | /* If we're in breakpoints-always-inserted mode, have to remove | |
2109 | them before detaching. */ | |
dfd4cc63 | 2110 | remove_breakpoints_pid (ptid_get_pid (inferior_ptid)); |
74960c60 | 2111 | |
24291992 PA |
2112 | prepare_for_detach (); |
2113 | ||
8b88a78e | 2114 | current_top_target ()->detach (inf, from_tty); |
c906108c SS |
2115 | } |
2116 | ||
6ad8ae5c | 2117 | void |
fee354ee | 2118 | target_disconnect (const char *args, int from_tty) |
6ad8ae5c | 2119 | { |
50c71eaf PA |
2120 | /* If we're in breakpoints-always-inserted mode or if breakpoints |
2121 | are global across processes, we have to remove them before | |
2122 | disconnecting. */ | |
74960c60 VP |
2123 | remove_breakpoints (); |
2124 | ||
8b88a78e | 2125 | current_top_target ()->disconnect (args, from_tty); |
6ad8ae5c DJ |
2126 | } |
2127 | ||
f2b9e3df SDJ |
2128 | /* See target/target.h. */ |
2129 | ||
117de6a9 | 2130 | ptid_t |
47608cb1 | 2131 | target_wait (ptid_t ptid, struct target_waitstatus *status, int options) |
117de6a9 | 2132 | { |
8b88a78e | 2133 | return current_top_target ()->wait (ptid, status, options); |
117de6a9 PA |
2134 | } |
2135 | ||
0b333c5e PA |
2136 | /* See target.h. */ |
2137 | ||
2138 | ptid_t | |
2139 | default_target_wait (struct target_ops *ops, | |
2140 | ptid_t ptid, struct target_waitstatus *status, | |
2141 | int options) | |
2142 | { | |
2143 | status->kind = TARGET_WAITKIND_IGNORE; | |
2144 | return minus_one_ptid; | |
2145 | } | |
2146 | ||
7a114964 | 2147 | const char * |
117de6a9 PA |
2148 | target_pid_to_str (ptid_t ptid) |
2149 | { | |
8b88a78e | 2150 | return current_top_target ()->pid_to_str (ptid); |
117de6a9 PA |
2151 | } |
2152 | ||
73ede765 | 2153 | const char * |
4694da01 TT |
2154 | target_thread_name (struct thread_info *info) |
2155 | { | |
8b88a78e | 2156 | return current_top_target ()->thread_name (info); |
4694da01 TT |
2157 | } |
2158 | ||
e04ee09e KB |
2159 | struct thread_info * |
2160 | target_thread_handle_to_thread_info (const gdb_byte *thread_handle, | |
2161 | int handle_len, | |
2162 | struct inferior *inf) | |
2163 | { | |
8b88a78e | 2164 | return current_top_target ()->thread_handle_to_thread_info (thread_handle, |
f6ac5f3d | 2165 | handle_len, inf); |
e04ee09e KB |
2166 | } |
2167 | ||
e1ac3328 | 2168 | void |
2ea28649 | 2169 | target_resume (ptid_t ptid, int step, enum gdb_signal signal) |
e1ac3328 | 2170 | { |
4e5d721f | 2171 | target_dcache_invalidate (); |
28439f5e | 2172 | |
8b88a78e | 2173 | current_top_target ()->resume (ptid, step, signal); |
28439f5e | 2174 | |
6b84065d | 2175 | registers_changed_ptid (ptid); |
251bde03 PA |
2176 | /* We only set the internal executing state here. The user/frontend |
2177 | running state is set at a higher level. */ | |
6b84065d | 2178 | set_executing (ptid, 1); |
6b84065d | 2179 | clear_inline_frame_state (ptid); |
e1ac3328 | 2180 | } |
2455069d | 2181 | |
85ad3aaf PA |
2182 | /* If true, target_commit_resume is a nop. */ |
2183 | static int defer_target_commit_resume; | |
2184 | ||
2185 | /* See target.h. */ | |
2186 | ||
2187 | void | |
2188 | target_commit_resume (void) | |
2189 | { | |
85ad3aaf PA |
2190 | if (defer_target_commit_resume) |
2191 | return; | |
2192 | ||
8b88a78e | 2193 | current_top_target ()->commit_resume (); |
85ad3aaf PA |
2194 | } |
2195 | ||
2196 | /* See target.h. */ | |
2197 | ||
a9bc57b9 TT |
2198 | scoped_restore_tmpl<int> |
2199 | make_scoped_defer_target_commit_resume () | |
85ad3aaf | 2200 | { |
a9bc57b9 | 2201 | return make_scoped_restore (&defer_target_commit_resume, 1); |
85ad3aaf PA |
2202 | } |
2203 | ||
2455069d UW |
2204 | void |
2205 | target_pass_signals (int numsigs, unsigned char *pass_signals) | |
2206 | { | |
8b88a78e | 2207 | current_top_target ()->pass_signals (numsigs, pass_signals); |
2455069d UW |
2208 | } |
2209 | ||
9b224c5e PA |
2210 | void |
2211 | target_program_signals (int numsigs, unsigned char *program_signals) | |
2212 | { | |
8b88a78e | 2213 | current_top_target ()->program_signals (numsigs, program_signals); |
9b224c5e PA |
2214 | } |
2215 | ||
098dba18 TT |
2216 | static int |
2217 | default_follow_fork (struct target_ops *self, int follow_child, | |
2218 | int detach_fork) | |
2219 | { | |
2220 | /* Some target returned a fork event, but did not know how to follow it. */ | |
2221 | internal_error (__FILE__, __LINE__, | |
2222 | _("could not find a target to follow fork")); | |
2223 | } | |
2224 | ||
ee057212 DJ |
2225 | /* Look through the list of possible targets for a target that can |
2226 | follow forks. */ | |
2227 | ||
2228 | int | |
07107ca6 | 2229 | target_follow_fork (int follow_child, int detach_fork) |
ee057212 | 2230 | { |
8b88a78e | 2231 | return current_top_target ()->follow_fork (follow_child, detach_fork); |
ee057212 DJ |
2232 | } |
2233 | ||
94585166 DB |
2234 | /* Target wrapper for follow exec hook. */ |
2235 | ||
2236 | void | |
2237 | target_follow_exec (struct inferior *inf, char *execd_pathname) | |
2238 | { | |
8b88a78e | 2239 | current_top_target ()->follow_exec (inf, execd_pathname); |
94585166 DB |
2240 | } |
2241 | ||
8d657035 TT |
2242 | static void |
2243 | default_mourn_inferior (struct target_ops *self) | |
2244 | { | |
2245 | internal_error (__FILE__, __LINE__, | |
2246 | _("could not find a target to follow mourn inferior")); | |
2247 | } | |
2248 | ||
136d6dae | 2249 | void |
bc1e6c81 | 2250 | target_mourn_inferior (ptid_t ptid) |
136d6dae | 2251 | { |
bc1e6c81 | 2252 | gdb_assert (ptid_equal (ptid, inferior_ptid)); |
8b88a78e | 2253 | current_top_target ()->mourn_inferior (); |
136d6dae | 2254 | |
8d657035 TT |
2255 | /* We no longer need to keep handles on any of the object files. |
2256 | Make sure to release them to avoid unnecessarily locking any | |
2257 | of them while we're not actually debugging. */ | |
2258 | bfd_cache_close_all (); | |
136d6dae VP |
2259 | } |
2260 | ||
424163ea DJ |
2261 | /* Look for a target which can describe architectural features, starting |
2262 | from TARGET. If we find one, return its description. */ | |
2263 | ||
2264 | const struct target_desc * | |
2265 | target_read_description (struct target_ops *target) | |
2266 | { | |
f6ac5f3d | 2267 | return target->read_description (); |
424163ea DJ |
2268 | } |
2269 | ||
58a5184e | 2270 | /* This implements a basic search of memory, reading target memory and |
08388c79 DE |
2271 | performing the search here (as opposed to performing the search in on the |
2272 | target side with, for example, gdbserver). */ | |
2273 | ||
2274 | int | |
2275 | simple_search_memory (struct target_ops *ops, | |
2276 | CORE_ADDR start_addr, ULONGEST search_space_len, | |
2277 | const gdb_byte *pattern, ULONGEST pattern_len, | |
2278 | CORE_ADDR *found_addrp) | |
2279 | { | |
2280 | /* NOTE: also defined in find.c testcase. */ | |
2281 | #define SEARCH_CHUNK_SIZE 16000 | |
2282 | const unsigned chunk_size = SEARCH_CHUNK_SIZE; | |
2283 | /* Buffer to hold memory contents for searching. */ | |
08388c79 | 2284 | unsigned search_buf_size; |
08388c79 DE |
2285 | |
2286 | search_buf_size = chunk_size + pattern_len - 1; | |
2287 | ||
2288 | /* No point in trying to allocate a buffer larger than the search space. */ | |
2289 | if (search_space_len < search_buf_size) | |
2290 | search_buf_size = search_space_len; | |
2291 | ||
26fcd5d7 | 2292 | gdb::byte_vector search_buf (search_buf_size); |
08388c79 DE |
2293 | |
2294 | /* Prime the search buffer. */ | |
2295 | ||
2296 | if (target_read (ops, TARGET_OBJECT_MEMORY, NULL, | |
26fcd5d7 TT |
2297 | search_buf.data (), start_addr, search_buf_size) |
2298 | != search_buf_size) | |
08388c79 | 2299 | { |
b3dc46ff AB |
2300 | warning (_("Unable to access %s bytes of target " |
2301 | "memory at %s, halting search."), | |
2302 | pulongest (search_buf_size), hex_string (start_addr)); | |
08388c79 DE |
2303 | return -1; |
2304 | } | |
2305 | ||
2306 | /* Perform the search. | |
2307 | ||
2308 | The loop is kept simple by allocating [N + pattern-length - 1] bytes. | |
2309 | When we've scanned N bytes we copy the trailing bytes to the start and | |
2310 | read in another N bytes. */ | |
2311 | ||
2312 | while (search_space_len >= pattern_len) | |
2313 | { | |
2314 | gdb_byte *found_ptr; | |
325fac50 PA |
2315 | unsigned nr_search_bytes |
2316 | = std::min (search_space_len, (ULONGEST) search_buf_size); | |
08388c79 | 2317 | |
26fcd5d7 | 2318 | found_ptr = (gdb_byte *) memmem (search_buf.data (), nr_search_bytes, |
d7f3ff3e | 2319 | pattern, pattern_len); |
08388c79 DE |
2320 | |
2321 | if (found_ptr != NULL) | |
2322 | { | |
26fcd5d7 | 2323 | CORE_ADDR found_addr = start_addr + (found_ptr - search_buf.data ()); |
5d502164 | 2324 | |
08388c79 | 2325 | *found_addrp = found_addr; |
08388c79 DE |
2326 | return 1; |
2327 | } | |
2328 | ||
2329 | /* Not found in this chunk, skip to next chunk. */ | |
2330 | ||
2331 | /* Don't let search_space_len wrap here, it's unsigned. */ | |
2332 | if (search_space_len >= chunk_size) | |
2333 | search_space_len -= chunk_size; | |
2334 | else | |
2335 | search_space_len = 0; | |
2336 | ||
2337 | if (search_space_len >= pattern_len) | |
2338 | { | |
2339 | unsigned keep_len = search_buf_size - chunk_size; | |
8a35fb51 | 2340 | CORE_ADDR read_addr = start_addr + chunk_size + keep_len; |
08388c79 DE |
2341 | int nr_to_read; |
2342 | ||
2343 | /* Copy the trailing part of the previous iteration to the front | |
2344 | of the buffer for the next iteration. */ | |
2345 | gdb_assert (keep_len == pattern_len - 1); | |
26fcd5d7 | 2346 | memcpy (&search_buf[0], &search_buf[chunk_size], keep_len); |
08388c79 | 2347 | |
325fac50 PA |
2348 | nr_to_read = std::min (search_space_len - keep_len, |
2349 | (ULONGEST) chunk_size); | |
08388c79 DE |
2350 | |
2351 | if (target_read (ops, TARGET_OBJECT_MEMORY, NULL, | |
26fcd5d7 | 2352 | &search_buf[keep_len], read_addr, |
08388c79 DE |
2353 | nr_to_read) != nr_to_read) |
2354 | { | |
b3dc46ff | 2355 | warning (_("Unable to access %s bytes of target " |
9b20d036 | 2356 | "memory at %s, halting search."), |
b3dc46ff | 2357 | plongest (nr_to_read), |
08388c79 | 2358 | hex_string (read_addr)); |
08388c79 DE |
2359 | return -1; |
2360 | } | |
2361 | ||
2362 | start_addr += chunk_size; | |
2363 | } | |
2364 | } | |
2365 | ||
2366 | /* Not found. */ | |
2367 | ||
08388c79 DE |
2368 | return 0; |
2369 | } | |
2370 | ||
58a5184e TT |
2371 | /* Default implementation of memory-searching. */ |
2372 | ||
2373 | static int | |
2374 | default_search_memory (struct target_ops *self, | |
2375 | CORE_ADDR start_addr, ULONGEST search_space_len, | |
2376 | const gdb_byte *pattern, ULONGEST pattern_len, | |
2377 | CORE_ADDR *found_addrp) | |
2378 | { | |
2379 | /* Start over from the top of the target stack. */ | |
8b88a78e | 2380 | return simple_search_memory (current_top_target (), |
58a5184e TT |
2381 | start_addr, search_space_len, |
2382 | pattern, pattern_len, found_addrp); | |
2383 | } | |
2384 | ||
08388c79 DE |
2385 | /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the |
2386 | sequence of bytes in PATTERN with length PATTERN_LEN. | |
2387 | ||
2388 | The result is 1 if found, 0 if not found, and -1 if there was an error | |
2389 | requiring halting of the search (e.g. memory read error). | |
2390 | If the pattern is found the address is recorded in FOUND_ADDRP. */ | |
2391 | ||
2392 | int | |
2393 | target_search_memory (CORE_ADDR start_addr, ULONGEST search_space_len, | |
2394 | const gdb_byte *pattern, ULONGEST pattern_len, | |
2395 | CORE_ADDR *found_addrp) | |
2396 | { | |
8b88a78e | 2397 | return current_top_target ()->search_memory (start_addr, search_space_len, |
f6ac5f3d | 2398 | pattern, pattern_len, found_addrp); |
08388c79 DE |
2399 | } |
2400 | ||
8edfe269 DJ |
2401 | /* Look through the currently pushed targets. If none of them will |
2402 | be able to restart the currently running process, issue an error | |
2403 | message. */ | |
2404 | ||
2405 | void | |
2406 | target_require_runnable (void) | |
2407 | { | |
2408 | struct target_ops *t; | |
2409 | ||
8b88a78e | 2410 | for (t = current_top_target (); t != NULL; t = t->beneath) |
8edfe269 DJ |
2411 | { |
2412 | /* If this target knows how to create a new program, then | |
2413 | assume we will still be able to after killing the current | |
2414 | one. Either killing and mourning will not pop T, or else | |
2415 | find_default_run_target will find it again. */ | |
f6ac5f3d | 2416 | if (t->can_create_inferior ()) |
8edfe269 DJ |
2417 | return; |
2418 | ||
548740d6 | 2419 | /* Do not worry about targets at certain strata that can not |
8edfe269 DJ |
2420 | create inferiors. Assume they will be pushed again if |
2421 | necessary, and continue to the process_stratum. */ | |
f6ac5f3d | 2422 | if (t->to_stratum > process_stratum) |
8edfe269 DJ |
2423 | continue; |
2424 | ||
3e43a32a MS |
2425 | error (_("The \"%s\" target does not support \"run\". " |
2426 | "Try \"help target\" or \"continue\"."), | |
f6ac5f3d | 2427 | t->shortname ()); |
8edfe269 DJ |
2428 | } |
2429 | ||
2430 | /* This function is only called if the target is running. In that | |
2431 | case there should have been a process_stratum target and it | |
c378eb4e | 2432 | should either know how to create inferiors, or not... */ |
9b20d036 | 2433 | internal_error (__FILE__, __LINE__, _("No targets found")); |
8edfe269 DJ |
2434 | } |
2435 | ||
6a3cb8e8 PA |
2436 | /* Whether GDB is allowed to fall back to the default run target for |
2437 | "run", "attach", etc. when no target is connected yet. */ | |
2438 | static int auto_connect_native_target = 1; | |
2439 | ||
2440 | static void | |
2441 | show_auto_connect_native_target (struct ui_file *file, int from_tty, | |
2442 | struct cmd_list_element *c, const char *value) | |
2443 | { | |
2444 | fprintf_filtered (file, | |
2445 | _("Whether GDB may automatically connect to the " | |
2446 | "native target is %s.\n"), | |
2447 | value); | |
2448 | } | |
2449 | ||
d9f719f1 PA |
2450 | /* A pointer to the target that can respond to "run" or "attach". |
2451 | Native targets are always singletons and instantiated early at GDB | |
2452 | startup. */ | |
2453 | static target_ops *the_native_target; | |
2454 | ||
2455 | /* See target.h. */ | |
2456 | ||
2457 | void | |
2458 | set_native_target (target_ops *target) | |
2459 | { | |
2460 | if (the_native_target != NULL) | |
2461 | internal_error (__FILE__, __LINE__, | |
2462 | _("native target already set (\"%s\")."), | |
2463 | the_native_target->longname ()); | |
2464 | ||
2465 | the_native_target = target; | |
2466 | } | |
2467 | ||
2468 | /* See target.h. */ | |
2469 | ||
2470 | target_ops * | |
2471 | get_native_target () | |
2472 | { | |
2473 | return the_native_target; | |
2474 | } | |
2475 | ||
c906108c SS |
2476 | /* Look through the list of possible targets for a target that can |
2477 | execute a run or attach command without any other data. This is | |
2478 | used to locate the default process stratum. | |
2479 | ||
5f667f2d PA |
2480 | If DO_MESG is not NULL, the result is always valid (error() is |
2481 | called for errors); else, return NULL on error. */ | |
c906108c SS |
2482 | |
2483 | static struct target_ops * | |
a121b7c1 | 2484 | find_default_run_target (const char *do_mesg) |
c906108c | 2485 | { |
d9f719f1 PA |
2486 | if (auto_connect_native_target && the_native_target != NULL) |
2487 | return the_native_target; | |
c906108c | 2488 | |
d9f719f1 PA |
2489 | if (do_mesg != NULL) |
2490 | error (_("Don't know how to %s. Try \"help target\"."), do_mesg); | |
2491 | return NULL; | |
c906108c SS |
2492 | } |
2493 | ||
b3ccfe11 | 2494 | /* See target.h. */ |
c906108c | 2495 | |
b3ccfe11 TT |
2496 | struct target_ops * |
2497 | find_attach_target (void) | |
c906108c | 2498 | { |
b3ccfe11 | 2499 | /* If a target on the current stack can attach, use it. */ |
8b88a78e | 2500 | for (target_ops *t = current_top_target (); t != NULL; t = t->beneath) |
b3ccfe11 | 2501 | { |
f6ac5f3d | 2502 | if (t->can_attach ()) |
d9f719f1 | 2503 | return t; |
b3ccfe11 | 2504 | } |
c906108c | 2505 | |
b3ccfe11 | 2506 | /* Otherwise, use the default run target for attaching. */ |
d9f719f1 | 2507 | return find_default_run_target ("attach"); |
b84876c2 PA |
2508 | } |
2509 | ||
b3ccfe11 | 2510 | /* See target.h. */ |
b84876c2 | 2511 | |
b3ccfe11 TT |
2512 | struct target_ops * |
2513 | find_run_target (void) | |
9908b566 | 2514 | { |
f6ac5f3d | 2515 | /* If a target on the current stack can run, use it. */ |
8b88a78e | 2516 | for (target_ops *t = current_top_target (); t != NULL; t = t->beneath) |
b3ccfe11 | 2517 | { |
f6ac5f3d | 2518 | if (t->can_create_inferior ()) |
d9f719f1 | 2519 | return t; |
b3ccfe11 | 2520 | } |
5d502164 | 2521 | |
b3ccfe11 | 2522 | /* Otherwise, use the default run target. */ |
d9f719f1 | 2523 | return find_default_run_target ("run"); |
9908b566 VP |
2524 | } |
2525 | ||
f6ac5f3d PA |
2526 | bool |
2527 | target_ops::info_proc (const char *args, enum info_proc_what what) | |
2528 | { | |
2529 | return false; | |
2530 | } | |
2531 | ||
145b16a9 UW |
2532 | /* Implement the "info proc" command. */ |
2533 | ||
451b7c33 | 2534 | int |
7bc112c1 | 2535 | target_info_proc (const char *args, enum info_proc_what what) |
145b16a9 UW |
2536 | { |
2537 | struct target_ops *t; | |
2538 | ||
2539 | /* If we're already connected to something that can get us OS | |
2540 | related data, use it. Otherwise, try using the native | |
2541 | target. */ | |
f6ac5f3d PA |
2542 | t = find_target_at (process_stratum); |
2543 | if (t == NULL) | |
145b16a9 UW |
2544 | t = find_default_run_target (NULL); |
2545 | ||
2546 | for (; t != NULL; t = t->beneath) | |
2547 | { | |
f6ac5f3d | 2548 | if (t->info_proc (args, what)) |
145b16a9 | 2549 | { |
145b16a9 UW |
2550 | if (targetdebug) |
2551 | fprintf_unfiltered (gdb_stdlog, | |
2552 | "target_info_proc (\"%s\", %d)\n", args, what); | |
2553 | ||
451b7c33 | 2554 | return 1; |
145b16a9 UW |
2555 | } |
2556 | } | |
2557 | ||
451b7c33 | 2558 | return 0; |
145b16a9 UW |
2559 | } |
2560 | ||
03583c20 | 2561 | static int |
2bfc0540 | 2562 | find_default_supports_disable_randomization (struct target_ops *self) |
03583c20 UW |
2563 | { |
2564 | struct target_ops *t; | |
2565 | ||
2566 | t = find_default_run_target (NULL); | |
f6ac5f3d PA |
2567 | if (t != NULL) |
2568 | return t->supports_disable_randomization (); | |
03583c20 UW |
2569 | return 0; |
2570 | } | |
2571 | ||
2572 | int | |
2573 | target_supports_disable_randomization (void) | |
2574 | { | |
8b88a78e | 2575 | return current_top_target ()->supports_disable_randomization (); |
03583c20 | 2576 | } |
9908b566 | 2577 | |
1fb77080 SDJ |
2578 | /* See target/target.h. */ |
2579 | ||
2580 | int | |
2581 | target_supports_multi_process (void) | |
2582 | { | |
8b88a78e | 2583 | return current_top_target ()->supports_multi_process (); |
1fb77080 SDJ |
2584 | } |
2585 | ||
b7b030ad TT |
2586 | /* See target.h. */ |
2587 | ||
9018be22 | 2588 | gdb::optional<gdb::char_vector> |
07e059b5 VP |
2589 | target_get_osdata (const char *type) |
2590 | { | |
07e059b5 VP |
2591 | struct target_ops *t; |
2592 | ||
739ef7fb PA |
2593 | /* If we're already connected to something that can get us OS |
2594 | related data, use it. Otherwise, try using the native | |
2595 | target. */ | |
f6ac5f3d PA |
2596 | t = find_target_at (process_stratum); |
2597 | if (t == NULL) | |
739ef7fb | 2598 | t = find_default_run_target ("get OS data"); |
07e059b5 VP |
2599 | |
2600 | if (!t) | |
9018be22 | 2601 | return {}; |
07e059b5 | 2602 | |
6d097e65 | 2603 | return target_read_stralloc (t, TARGET_OBJECT_OSDATA, type); |
07e059b5 VP |
2604 | } |
2605 | ||
8eaff7cd TT |
2606 | static struct address_space * |
2607 | default_thread_address_space (struct target_ops *self, ptid_t ptid) | |
6c95b8df PA |
2608 | { |
2609 | struct inferior *inf; | |
6c95b8df PA |
2610 | |
2611 | /* Fall-back to the "main" address space of the inferior. */ | |
c9657e70 | 2612 | inf = find_inferior_ptid (ptid); |
6c95b8df PA |
2613 | |
2614 | if (inf == NULL || inf->aspace == NULL) | |
3e43a32a | 2615 | internal_error (__FILE__, __LINE__, |
9b20d036 MS |
2616 | _("Can't determine the current " |
2617 | "address space of thread %s\n"), | |
6c95b8df PA |
2618 | target_pid_to_str (ptid)); |
2619 | ||
2620 | return inf->aspace; | |
2621 | } | |
2622 | ||
8eaff7cd TT |
2623 | /* Determine the current address space of thread PTID. */ |
2624 | ||
2625 | struct address_space * | |
2626 | target_thread_address_space (ptid_t ptid) | |
2627 | { | |
2628 | struct address_space *aspace; | |
2629 | ||
8b88a78e | 2630 | aspace = current_top_target ()->thread_address_space (ptid); |
8eaff7cd TT |
2631 | gdb_assert (aspace != NULL); |
2632 | ||
8eaff7cd TT |
2633 | return aspace; |
2634 | } | |
2635 | ||
f6ac5f3d PA |
2636 | void |
2637 | target_ops::close () | |
2638 | { | |
2639 | } | |
2640 | ||
2641 | bool | |
2642 | target_ops::can_attach () | |
2643 | { | |
2644 | return 0; | |
2645 | } | |
2646 | ||
2647 | void | |
2648 | target_ops::attach (const char *, int) | |
2649 | { | |
2650 | gdb_assert_not_reached ("target_ops::attach called"); | |
2651 | } | |
2652 | ||
2653 | bool | |
2654 | target_ops::can_create_inferior () | |
2655 | { | |
2656 | return 0; | |
2657 | } | |
2658 | ||
2659 | void | |
2660 | target_ops::create_inferior (const char *, const std::string &, | |
2661 | char **, int) | |
2662 | { | |
2663 | gdb_assert_not_reached ("target_ops::create_inferior called"); | |
2664 | } | |
2665 | ||
57810aa7 | 2666 | bool |
f6ac5f3d PA |
2667 | target_ops::can_run () |
2668 | { | |
57810aa7 | 2669 | return false; |
f6ac5f3d PA |
2670 | } |
2671 | ||
2672 | int | |
2673 | target_can_run () | |
2674 | { | |
2675 | struct target_ops *t; | |
2676 | ||
8b88a78e | 2677 | for (t = current_top_target (); t != NULL; t = t->beneath) |
f6ac5f3d PA |
2678 | { |
2679 | if (t->can_run ()) | |
2680 | return 1; | |
2681 | } | |
2682 | ||
2683 | return 0; | |
2684 | } | |
7313baad UW |
2685 | |
2686 | /* Target file operations. */ | |
2687 | ||
2688 | static struct target_ops * | |
2689 | default_fileio_target (void) | |
2690 | { | |
f6ac5f3d PA |
2691 | struct target_ops *t; |
2692 | ||
7313baad UW |
2693 | /* If we're already connected to something that can perform |
2694 | file I/O, use it. Otherwise, try using the native target. */ | |
f6ac5f3d PA |
2695 | t = find_target_at (process_stratum); |
2696 | if (t != NULL) | |
2697 | return t; | |
2698 | return find_default_run_target ("file I/O"); | |
7313baad UW |
2699 | } |
2700 | ||
1c4b552b GB |
2701 | /* File handle for target file operations. */ |
2702 | ||
5ff79300 | 2703 | struct fileio_fh_t |
1c4b552b | 2704 | { |
20db9c52 PA |
2705 | /* The target on which this file is open. NULL if the target is |
2706 | meanwhile closed while the handle is open. */ | |
5ff79300 | 2707 | target_ops *target; |
1c4b552b GB |
2708 | |
2709 | /* The file descriptor on the target. */ | |
5ff79300 | 2710 | int target_fd; |
1c4b552b | 2711 | |
5ff79300 PA |
2712 | /* Check whether this fileio_fh_t represents a closed file. */ |
2713 | bool is_closed () | |
2714 | { | |
2715 | return target_fd < 0; | |
2716 | } | |
2717 | }; | |
1c4b552b GB |
2718 | |
2719 | /* Vector of currently open file handles. The value returned by | |
2720 | target_fileio_open and passed as the FD argument to other | |
2721 | target_fileio_* functions is an index into this vector. This | |
2722 | vector's entries are never freed; instead, files are marked as | |
2723 | closed, and the handle becomes available for reuse. */ | |
5ff79300 | 2724 | static std::vector<fileio_fh_t> fileio_fhandles; |
1c4b552b GB |
2725 | |
2726 | /* Index into fileio_fhandles of the lowest handle that might be | |
2727 | closed. This permits handle reuse without searching the whole | |
2728 | list each time a new file is opened. */ | |
2729 | static int lowest_closed_fd; | |
2730 | ||
20db9c52 PA |
2731 | /* Invalidate the target associated with open handles that were open |
2732 | on target TARG, since we're about to close (and maybe destroy) the | |
2733 | target. The handles remain open from the client's perspective, but | |
2734 | trying to do anything with them other than closing them will fail | |
2735 | with EIO. */ | |
2736 | ||
2737 | static void | |
2738 | fileio_handles_invalidate_target (target_ops *targ) | |
2739 | { | |
2740 | for (fileio_fh_t &fh : fileio_fhandles) | |
2741 | if (fh.target == targ) | |
2742 | fh.target = NULL; | |
2743 | } | |
2744 | ||
1c4b552b GB |
2745 | /* Acquire a target fileio file descriptor. */ |
2746 | ||
2747 | static int | |
5ff79300 | 2748 | acquire_fileio_fd (target_ops *target, int target_fd) |
1c4b552b | 2749 | { |
1c4b552b | 2750 | /* Search for closed handles to reuse. */ |
5ff79300 PA |
2751 | for (; lowest_closed_fd < fileio_fhandles.size (); lowest_closed_fd++) |
2752 | { | |
2753 | fileio_fh_t &fh = fileio_fhandles[lowest_closed_fd]; | |
2754 | ||
2755 | if (fh.is_closed ()) | |
2756 | break; | |
2757 | } | |
1c4b552b GB |
2758 | |
2759 | /* Push a new handle if no closed handles were found. */ | |
5ff79300 PA |
2760 | if (lowest_closed_fd == fileio_fhandles.size ()) |
2761 | fileio_fhandles.push_back (fileio_fh_t {target, target_fd}); | |
2762 | else | |
2763 | fileio_fhandles[lowest_closed_fd] = {target, target_fd}; | |
1c4b552b | 2764 | |
5ff79300 PA |
2765 | /* Should no longer be marked closed. */ |
2766 | gdb_assert (!fileio_fhandles[lowest_closed_fd].is_closed ()); | |
1c4b552b GB |
2767 | |
2768 | /* Return its index, and start the next lookup at | |
2769 | the next index. */ | |
2770 | return lowest_closed_fd++; | |
2771 | } | |
2772 | ||
2773 | /* Release a target fileio file descriptor. */ | |
2774 | ||
2775 | static void | |
2776 | release_fileio_fd (int fd, fileio_fh_t *fh) | |
2777 | { | |
5ff79300 | 2778 | fh->target_fd = -1; |
325fac50 | 2779 | lowest_closed_fd = std::min (lowest_closed_fd, fd); |
1c4b552b GB |
2780 | } |
2781 | ||
2782 | /* Return a pointer to the fileio_fhandle_t corresponding to FD. */ | |
2783 | ||
5ff79300 PA |
2784 | static fileio_fh_t * |
2785 | fileio_fd_to_fh (int fd) | |
2786 | { | |
2787 | return &fileio_fhandles[fd]; | |
2788 | } | |
1c4b552b | 2789 | |
f6ac5f3d PA |
2790 | |
2791 | /* Default implementations of file i/o methods. We don't want these | |
2792 | to delegate automatically, because we need to know which target | |
2793 | supported the method, in order to call it directly from within | |
2794 | pread/pwrite, etc. */ | |
2795 | ||
2796 | int | |
2797 | target_ops::fileio_open (struct inferior *inf, const char *filename, | |
2798 | int flags, int mode, int warn_if_slow, | |
2799 | int *target_errno) | |
2800 | { | |
2801 | *target_errno = FILEIO_ENOSYS; | |
2802 | return -1; | |
2803 | } | |
2804 | ||
2805 | int | |
2806 | target_ops::fileio_pwrite (int fd, const gdb_byte *write_buf, int len, | |
2807 | ULONGEST offset, int *target_errno) | |
2808 | { | |
2809 | *target_errno = FILEIO_ENOSYS; | |
2810 | return -1; | |
2811 | } | |
2812 | ||
2813 | int | |
2814 | target_ops::fileio_pread (int fd, gdb_byte *read_buf, int len, | |
2815 | ULONGEST offset, int *target_errno) | |
2816 | { | |
2817 | *target_errno = FILEIO_ENOSYS; | |
2818 | return -1; | |
2819 | } | |
2820 | ||
2821 | int | |
2822 | target_ops::fileio_fstat (int fd, struct stat *sb, int *target_errno) | |
2823 | { | |
2824 | *target_errno = FILEIO_ENOSYS; | |
2825 | return -1; | |
2826 | } | |
2827 | ||
2828 | int | |
2829 | target_ops::fileio_close (int fd, int *target_errno) | |
2830 | { | |
2831 | *target_errno = FILEIO_ENOSYS; | |
2832 | return -1; | |
2833 | } | |
2834 | ||
2835 | int | |
2836 | target_ops::fileio_unlink (struct inferior *inf, const char *filename, | |
2837 | int *target_errno) | |
2838 | { | |
2839 | *target_errno = FILEIO_ENOSYS; | |
2840 | return -1; | |
2841 | } | |
2842 | ||
2843 | gdb::optional<std::string> | |
2844 | target_ops::fileio_readlink (struct inferior *inf, const char *filename, | |
2845 | int *target_errno) | |
2846 | { | |
2847 | *target_errno = FILEIO_ENOSYS; | |
2848 | return {}; | |
2849 | } | |
2850 | ||
4313b8c0 GB |
2851 | /* Helper for target_fileio_open and |
2852 | target_fileio_open_warn_if_slow. */ | |
12e2a5fd | 2853 | |
4313b8c0 GB |
2854 | static int |
2855 | target_fileio_open_1 (struct inferior *inf, const char *filename, | |
2856 | int flags, int mode, int warn_if_slow, | |
2857 | int *target_errno) | |
7313baad UW |
2858 | { |
2859 | struct target_ops *t; | |
2860 | ||
2861 | for (t = default_fileio_target (); t != NULL; t = t->beneath) | |
2862 | { | |
f6ac5f3d PA |
2863 | int fd = t->fileio_open (inf, filename, flags, mode, |
2864 | warn_if_slow, target_errno); | |
7313baad | 2865 | |
f6ac5f3d PA |
2866 | if (fd == -1 && *target_errno == FILEIO_ENOSYS) |
2867 | continue; | |
1c4b552b | 2868 | |
f6ac5f3d PA |
2869 | if (fd < 0) |
2870 | fd = -1; | |
2871 | else | |
2872 | fd = acquire_fileio_fd (t, fd); | |
2873 | ||
2874 | if (targetdebug) | |
2875 | fprintf_unfiltered (gdb_stdlog, | |
4313b8c0 | 2876 | "target_fileio_open (%d,%s,0x%x,0%o,%d)" |
07c138c8 GB |
2877 | " = %d (%d)\n", |
2878 | inf == NULL ? 0 : inf->num, | |
7313baad | 2879 | filename, flags, mode, |
4313b8c0 GB |
2880 | warn_if_slow, fd, |
2881 | fd != -1 ? 0 : *target_errno); | |
f6ac5f3d | 2882 | return fd; |
7313baad UW |
2883 | } |
2884 | ||
2885 | *target_errno = FILEIO_ENOSYS; | |
2886 | return -1; | |
2887 | } | |
2888 | ||
12e2a5fd GB |
2889 | /* See target.h. */ |
2890 | ||
4313b8c0 GB |
2891 | int |
2892 | target_fileio_open (struct inferior *inf, const char *filename, | |
2893 | int flags, int mode, int *target_errno) | |
2894 | { | |
2895 | return target_fileio_open_1 (inf, filename, flags, mode, 0, | |
2896 | target_errno); | |
2897 | } | |
2898 | ||
2899 | /* See target.h. */ | |
2900 | ||
2901 | int | |
2902 | target_fileio_open_warn_if_slow (struct inferior *inf, | |
2903 | const char *filename, | |
2904 | int flags, int mode, int *target_errno) | |
2905 | { | |
2906 | return target_fileio_open_1 (inf, filename, flags, mode, 1, | |
2907 | target_errno); | |
2908 | } | |
2909 | ||
2910 | /* See target.h. */ | |
2911 | ||
7313baad UW |
2912 | int |
2913 | target_fileio_pwrite (int fd, const gdb_byte *write_buf, int len, | |
2914 | ULONGEST offset, int *target_errno) | |
2915 | { | |
1c4b552b GB |
2916 | fileio_fh_t *fh = fileio_fd_to_fh (fd); |
2917 | int ret = -1; | |
7313baad | 2918 | |
5ff79300 | 2919 | if (fh->is_closed ()) |
1c4b552b | 2920 | *target_errno = EBADF; |
20db9c52 PA |
2921 | else if (fh->target == NULL) |
2922 | *target_errno = EIO; | |
1c4b552b | 2923 | else |
f6ac5f3d PA |
2924 | ret = fh->target->fileio_pwrite (fh->target_fd, write_buf, |
2925 | len, offset, target_errno); | |
7313baad | 2926 | |
1c4b552b GB |
2927 | if (targetdebug) |
2928 | fprintf_unfiltered (gdb_stdlog, | |
2929 | "target_fileio_pwrite (%d,...,%d,%s) " | |
2930 | "= %d (%d)\n", | |
2931 | fd, len, pulongest (offset), | |
2932 | ret, ret != -1 ? 0 : *target_errno); | |
2933 | return ret; | |
7313baad UW |
2934 | } |
2935 | ||
12e2a5fd GB |
2936 | /* See target.h. */ |
2937 | ||
7313baad UW |
2938 | int |
2939 | target_fileio_pread (int fd, gdb_byte *read_buf, int len, | |
2940 | ULONGEST offset, int *target_errno) | |
2941 | { | |
1c4b552b GB |
2942 | fileio_fh_t *fh = fileio_fd_to_fh (fd); |
2943 | int ret = -1; | |
7313baad | 2944 | |
5ff79300 | 2945 | if (fh->is_closed ()) |
1c4b552b | 2946 | *target_errno = EBADF; |
20db9c52 PA |
2947 | else if (fh->target == NULL) |
2948 | *target_errno = EIO; | |
1c4b552b | 2949 | else |
f6ac5f3d PA |
2950 | ret = fh->target->fileio_pread (fh->target_fd, read_buf, |
2951 | len, offset, target_errno); | |
7313baad | 2952 | |
1c4b552b GB |
2953 | if (targetdebug) |
2954 | fprintf_unfiltered (gdb_stdlog, | |
2955 | "target_fileio_pread (%d,...,%d,%s) " | |
2956 | "= %d (%d)\n", | |
2957 | fd, len, pulongest (offset), | |
2958 | ret, ret != -1 ? 0 : *target_errno); | |
9b15c1f0 GB |
2959 | return ret; |
2960 | } | |
2961 | ||
2962 | /* See target.h. */ | |
12e2a5fd | 2963 | |
9b15c1f0 GB |
2964 | int |
2965 | target_fileio_fstat (int fd, struct stat *sb, int *target_errno) | |
2966 | { | |
2967 | fileio_fh_t *fh = fileio_fd_to_fh (fd); | |
2968 | int ret = -1; | |
2969 | ||
5ff79300 | 2970 | if (fh->is_closed ()) |
9b15c1f0 | 2971 | *target_errno = EBADF; |
20db9c52 PA |
2972 | else if (fh->target == NULL) |
2973 | *target_errno = EIO; | |
9b15c1f0 | 2974 | else |
f6ac5f3d | 2975 | ret = fh->target->fileio_fstat (fh->target_fd, sb, target_errno); |
9b15c1f0 GB |
2976 | |
2977 | if (targetdebug) | |
2978 | fprintf_unfiltered (gdb_stdlog, | |
2979 | "target_fileio_fstat (%d) = %d (%d)\n", | |
2980 | fd, ret, ret != -1 ? 0 : *target_errno); | |
1c4b552b | 2981 | return ret; |
7313baad UW |
2982 | } |
2983 | ||
12e2a5fd GB |
2984 | /* See target.h. */ |
2985 | ||
7313baad UW |
2986 | int |
2987 | target_fileio_close (int fd, int *target_errno) | |
2988 | { | |
1c4b552b GB |
2989 | fileio_fh_t *fh = fileio_fd_to_fh (fd); |
2990 | int ret = -1; | |
7313baad | 2991 | |
5ff79300 | 2992 | if (fh->is_closed ()) |
1c4b552b GB |
2993 | *target_errno = EBADF; |
2994 | else | |
7313baad | 2995 | { |
20db9c52 | 2996 | if (fh->target != NULL) |
f6ac5f3d PA |
2997 | ret = fh->target->fileio_close (fh->target_fd, |
2998 | target_errno); | |
20db9c52 PA |
2999 | else |
3000 | ret = 0; | |
1c4b552b | 3001 | release_fileio_fd (fd, fh); |
7313baad UW |
3002 | } |
3003 | ||
1c4b552b GB |
3004 | if (targetdebug) |
3005 | fprintf_unfiltered (gdb_stdlog, | |
3006 | "target_fileio_close (%d) = %d (%d)\n", | |
3007 | fd, ret, ret != -1 ? 0 : *target_errno); | |
3008 | return ret; | |
7313baad UW |
3009 | } |
3010 | ||
12e2a5fd GB |
3011 | /* See target.h. */ |
3012 | ||
7313baad | 3013 | int |
07c138c8 GB |
3014 | target_fileio_unlink (struct inferior *inf, const char *filename, |
3015 | int *target_errno) | |
7313baad UW |
3016 | { |
3017 | struct target_ops *t; | |
3018 | ||
3019 | for (t = default_fileio_target (); t != NULL; t = t->beneath) | |
3020 | { | |
f6ac5f3d | 3021 | int ret = t->fileio_unlink (inf, filename, target_errno); |
7313baad | 3022 | |
f6ac5f3d PA |
3023 | if (ret == -1 && *target_errno == FILEIO_ENOSYS) |
3024 | continue; | |
3025 | ||
3026 | if (targetdebug) | |
3027 | fprintf_unfiltered (gdb_stdlog, | |
3028 | "target_fileio_unlink (%d,%s)" | |
3029 | " = %d (%d)\n", | |
3030 | inf == NULL ? 0 : inf->num, filename, | |
3031 | ret, ret != -1 ? 0 : *target_errno); | |
3032 | return ret; | |
7313baad UW |
3033 | } |
3034 | ||
3035 | *target_errno = FILEIO_ENOSYS; | |
3036 | return -1; | |
3037 | } | |
3038 | ||
12e2a5fd GB |
3039 | /* See target.h. */ |
3040 | ||
e0d3522b | 3041 | gdb::optional<std::string> |
07c138c8 GB |
3042 | target_fileio_readlink (struct inferior *inf, const char *filename, |
3043 | int *target_errno) | |
b9e7b9c3 UW |
3044 | { |
3045 | struct target_ops *t; | |
3046 | ||
3047 | for (t = default_fileio_target (); t != NULL; t = t->beneath) | |
3048 | { | |
f6ac5f3d PA |
3049 | gdb::optional<std::string> ret |
3050 | = t->fileio_readlink (inf, filename, target_errno); | |
b9e7b9c3 | 3051 | |
f6ac5f3d PA |
3052 | if (!ret.has_value () && *target_errno == FILEIO_ENOSYS) |
3053 | continue; | |
3054 | ||
3055 | if (targetdebug) | |
3056 | fprintf_unfiltered (gdb_stdlog, | |
3057 | "target_fileio_readlink (%d,%s)" | |
3058 | " = %s (%d)\n", | |
3059 | inf == NULL ? 0 : inf->num, | |
3060 | filename, ret ? ret->c_str () : "(nil)", | |
3061 | ret ? 0 : *target_errno); | |
3062 | return ret; | |
b9e7b9c3 UW |
3063 | } |
3064 | ||
3065 | *target_errno = FILEIO_ENOSYS; | |
e0d3522b | 3066 | return {}; |
b9e7b9c3 UW |
3067 | } |
3068 | ||
770623f7 TT |
3069 | /* Like scoped_fd, but specific to target fileio. */ |
3070 | ||
3071 | class scoped_target_fd | |
7313baad | 3072 | { |
770623f7 TT |
3073 | public: |
3074 | explicit scoped_target_fd (int fd) noexcept | |
3075 | : m_fd (fd) | |
3076 | { | |
3077 | } | |
7313baad | 3078 | |
770623f7 TT |
3079 | ~scoped_target_fd () |
3080 | { | |
3081 | if (m_fd >= 0) | |
3082 | { | |
3083 | int target_errno; | |
3084 | ||
3085 | target_fileio_close (m_fd, &target_errno); | |
3086 | } | |
3087 | } | |
3088 | ||
3089 | DISABLE_COPY_AND_ASSIGN (scoped_target_fd); | |
3090 | ||
3091 | int get () const noexcept | |
3092 | { | |
3093 | return m_fd; | |
3094 | } | |
3095 | ||
3096 | private: | |
3097 | int m_fd; | |
3098 | }; | |
7313baad | 3099 | |
07c138c8 GB |
3100 | /* Read target file FILENAME, in the filesystem as seen by INF. If |
3101 | INF is NULL, use the filesystem seen by the debugger (GDB or, for | |
3102 | remote targets, the remote stub). Store the result in *BUF_P and | |
3103 | return the size of the transferred data. PADDING additional bytes | |
3104 | are available in *BUF_P. This is a helper function for | |
3105 | target_fileio_read_alloc; see the declaration of that function for | |
3106 | more information. */ | |
7313baad | 3107 | |
f7af1fcd JK |
3108 | static LONGEST |
3109 | target_fileio_read_alloc_1 (struct inferior *inf, const char *filename, | |
3110 | gdb_byte **buf_p, int padding) | |
3111 | { | |
db1ff28b JK |
3112 | size_t buf_alloc, buf_pos; |
3113 | gdb_byte *buf; | |
3114 | LONGEST n; | |
db1ff28b | 3115 | int target_errno; |
f7af1fcd | 3116 | |
770623f7 TT |
3117 | scoped_target_fd fd (target_fileio_open (inf, filename, FILEIO_O_RDONLY, |
3118 | 0700, &target_errno)); | |
3119 | if (fd.get () == -1) | |
f7af1fcd JK |
3120 | return -1; |
3121 | ||
db1ff28b JK |
3122 | /* Start by reading up to 4K at a time. The target will throttle |
3123 | this number down if necessary. */ | |
3124 | buf_alloc = 4096; | |
224c3ddb | 3125 | buf = (gdb_byte *) xmalloc (buf_alloc); |
db1ff28b JK |
3126 | buf_pos = 0; |
3127 | while (1) | |
3128 | { | |
770623f7 | 3129 | n = target_fileio_pread (fd.get (), &buf[buf_pos], |
db1ff28b JK |
3130 | buf_alloc - buf_pos - padding, buf_pos, |
3131 | &target_errno); | |
3132 | if (n < 0) | |
3133 | { | |
3134 | /* An error occurred. */ | |
db1ff28b JK |
3135 | xfree (buf); |
3136 | return -1; | |
3137 | } | |
3138 | else if (n == 0) | |
3139 | { | |
3140 | /* Read all there was. */ | |
db1ff28b JK |
3141 | if (buf_pos == 0) |
3142 | xfree (buf); | |
3143 | else | |
3144 | *buf_p = buf; | |
3145 | return buf_pos; | |
3146 | } | |
3147 | ||
3148 | buf_pos += n; | |
3149 | ||
3150 | /* If the buffer is filling up, expand it. */ | |
3151 | if (buf_alloc < buf_pos * 2) | |
3152 | { | |
3153 | buf_alloc *= 2; | |
224c3ddb | 3154 | buf = (gdb_byte *) xrealloc (buf, buf_alloc); |
db1ff28b JK |
3155 | } |
3156 | ||
3157 | QUIT; | |
3158 | } | |
f7af1fcd JK |
3159 | } |
3160 | ||
12e2a5fd | 3161 | /* See target.h. */ |
7313baad UW |
3162 | |
3163 | LONGEST | |
07c138c8 GB |
3164 | target_fileio_read_alloc (struct inferior *inf, const char *filename, |
3165 | gdb_byte **buf_p) | |
7313baad | 3166 | { |
07c138c8 | 3167 | return target_fileio_read_alloc_1 (inf, filename, buf_p, 0); |
7313baad UW |
3168 | } |
3169 | ||
db1ff28b | 3170 | /* See target.h. */ |
f7af1fcd | 3171 | |
87028b87 | 3172 | gdb::unique_xmalloc_ptr<char> |
f7af1fcd JK |
3173 | target_fileio_read_stralloc (struct inferior *inf, const char *filename) |
3174 | { | |
db1ff28b JK |
3175 | gdb_byte *buffer; |
3176 | char *bufstr; | |
3177 | LONGEST i, transferred; | |
3178 | ||
3179 | transferred = target_fileio_read_alloc_1 (inf, filename, &buffer, 1); | |
3180 | bufstr = (char *) buffer; | |
3181 | ||
3182 | if (transferred < 0) | |
87028b87 | 3183 | return gdb::unique_xmalloc_ptr<char> (nullptr); |
db1ff28b JK |
3184 | |
3185 | if (transferred == 0) | |
87028b87 | 3186 | return gdb::unique_xmalloc_ptr<char> (xstrdup ("")); |
db1ff28b JK |
3187 | |
3188 | bufstr[transferred] = 0; | |
3189 | ||
3190 | /* Check for embedded NUL bytes; but allow trailing NULs. */ | |
3191 | for (i = strlen (bufstr); i < transferred; i++) | |
3192 | if (bufstr[i] != 0) | |
3193 | { | |
3194 | warning (_("target file %s " | |
3195 | "contained unexpected null characters"), | |
3196 | filename); | |
3197 | break; | |
3198 | } | |
3199 | ||
87028b87 | 3200 | return gdb::unique_xmalloc_ptr<char> (bufstr); |
f7af1fcd | 3201 | } |
7313baad | 3202 | |
db1ff28b | 3203 | |
e0d24f8d | 3204 | static int |
31568a15 TT |
3205 | default_region_ok_for_hw_watchpoint (struct target_ops *self, |
3206 | CORE_ADDR addr, int len) | |
e0d24f8d | 3207 | { |
f5656ead | 3208 | return (len <= gdbarch_ptr_bit (target_gdbarch ()) / TARGET_CHAR_BIT); |
ccaa32c7 GS |
3209 | } |
3210 | ||
5009afc5 AS |
3211 | static int |
3212 | default_watchpoint_addr_within_range (struct target_ops *target, | |
3213 | CORE_ADDR addr, | |
3214 | CORE_ADDR start, int length) | |
3215 | { | |
3216 | return addr >= start && addr < start + length; | |
3217 | } | |
3218 | ||
c2250ad1 UW |
3219 | static struct gdbarch * |
3220 | default_thread_architecture (struct target_ops *ops, ptid_t ptid) | |
3221 | { | |
5cd63fda PA |
3222 | inferior *inf = find_inferior_ptid (ptid); |
3223 | gdb_assert (inf != NULL); | |
3224 | return inf->gdbarch; | |
c2250ad1 UW |
3225 | } |
3226 | ||
ed9a39eb JM |
3227 | /* |
3228 | * Find the next target down the stack from the specified target. | |
3229 | */ | |
3230 | ||
3231 | struct target_ops * | |
fba45db2 | 3232 | find_target_beneath (struct target_ops *t) |
ed9a39eb | 3233 | { |
258b763a | 3234 | return t->beneath; |
ed9a39eb JM |
3235 | } |
3236 | ||
8b06beed TT |
3237 | /* See target.h. */ |
3238 | ||
3239 | struct target_ops * | |
3240 | find_target_at (enum strata stratum) | |
3241 | { | |
3242 | struct target_ops *t; | |
3243 | ||
8b88a78e | 3244 | for (t = current_top_target (); t != NULL; t = t->beneath) |
8b06beed TT |
3245 | if (t->to_stratum == stratum) |
3246 | return t; | |
3247 | ||
3248 | return NULL; | |
3249 | } | |
3250 | ||
c906108c | 3251 | \f |
0f48b757 PA |
3252 | |
3253 | /* See target.h */ | |
3254 | ||
3255 | void | |
3256 | target_announce_detach (int from_tty) | |
3257 | { | |
3258 | pid_t pid; | |
a121b7c1 | 3259 | const char *exec_file; |
0f48b757 PA |
3260 | |
3261 | if (!from_tty) | |
3262 | return; | |
3263 | ||
3264 | exec_file = get_exec_file (0); | |
3265 | if (exec_file == NULL) | |
3266 | exec_file = ""; | |
3267 | ||
3268 | pid = ptid_get_pid (inferior_ptid); | |
3269 | printf_unfiltered (_("Detaching from program: %s, %s\n"), exec_file, | |
3270 | target_pid_to_str (pid_to_ptid (pid))); | |
3271 | gdb_flush (gdb_stdout); | |
3272 | } | |
3273 | ||
c906108c SS |
3274 | /* The inferior process has died. Long live the inferior! */ |
3275 | ||
3276 | void | |
fba45db2 | 3277 | generic_mourn_inferior (void) |
c906108c | 3278 | { |
7f9f62ba | 3279 | ptid_t ptid; |
c906108c | 3280 | |
7f9f62ba | 3281 | ptid = inferior_ptid; |
39f77062 | 3282 | inferior_ptid = null_ptid; |
7f9f62ba | 3283 | |
f59f708a PA |
3284 | /* Mark breakpoints uninserted in case something tries to delete a |
3285 | breakpoint while we delete the inferior's threads (which would | |
3286 | fail, since the inferior is long gone). */ | |
3287 | mark_breakpoints_out (); | |
3288 | ||
7f9f62ba PA |
3289 | if (!ptid_equal (ptid, null_ptid)) |
3290 | { | |
3291 | int pid = ptid_get_pid (ptid); | |
6c95b8df | 3292 | exit_inferior (pid); |
7f9f62ba PA |
3293 | } |
3294 | ||
f59f708a PA |
3295 | /* Note this wipes step-resume breakpoints, so needs to be done |
3296 | after exit_inferior, which ends up referencing the step-resume | |
3297 | breakpoints through clear_thread_inferior_resources. */ | |
c906108c | 3298 | breakpoint_init_inferior (inf_exited); |
f59f708a | 3299 | |
c906108c SS |
3300 | registers_changed (); |
3301 | ||
c906108c SS |
3302 | reopen_exec_file (); |
3303 | reinit_frame_cache (); | |
3304 | ||
9a4105ab AC |
3305 | if (deprecated_detach_hook) |
3306 | deprecated_detach_hook (); | |
c906108c SS |
3307 | } |
3308 | \f | |
fd0a2a6f MK |
3309 | /* Convert a normal process ID to a string. Returns the string in a |
3310 | static buffer. */ | |
c906108c | 3311 | |
7a114964 | 3312 | const char * |
39f77062 | 3313 | normal_pid_to_str (ptid_t ptid) |
c906108c | 3314 | { |
fd0a2a6f | 3315 | static char buf[32]; |
c906108c | 3316 | |
5fff8fc0 | 3317 | xsnprintf (buf, sizeof buf, "process %d", ptid_get_pid (ptid)); |
c906108c SS |
3318 | return buf; |
3319 | } | |
3320 | ||
7a114964 | 3321 | static const char * |
770234d3 | 3322 | default_pid_to_str (struct target_ops *ops, ptid_t ptid) |
117de6a9 PA |
3323 | { |
3324 | return normal_pid_to_str (ptid); | |
3325 | } | |
3326 | ||
9b4eba8e HZ |
3327 | /* Error-catcher for target_find_memory_regions. */ |
3328 | static int | |
2e73927c TT |
3329 | dummy_find_memory_regions (struct target_ops *self, |
3330 | find_memory_region_ftype ignore1, void *ignore2) | |
be4d1333 | 3331 | { |
9b4eba8e | 3332 | error (_("Command not implemented for this target.")); |
be4d1333 MS |
3333 | return 0; |
3334 | } | |
3335 | ||
9b4eba8e HZ |
3336 | /* Error-catcher for target_make_corefile_notes. */ |
3337 | static char * | |
fc6691b2 TT |
3338 | dummy_make_corefile_notes (struct target_ops *self, |
3339 | bfd *ignore1, int *ignore2) | |
be4d1333 | 3340 | { |
9b4eba8e | 3341 | error (_("Command not implemented for this target.")); |
be4d1333 MS |
3342 | return NULL; |
3343 | } | |
3344 | ||
f6ac5f3d PA |
3345 | #include "target-delegates.c" |
3346 | ||
c906108c | 3347 | |
d9f719f1 PA |
3348 | static const target_info dummy_target_info = { |
3349 | "None", | |
3350 | N_("None"), | |
3351 | "" | |
3352 | }; | |
3353 | ||
f6ac5f3d PA |
3354 | dummy_target::dummy_target () |
3355 | { | |
3356 | to_stratum = dummy_stratum; | |
3357 | } | |
3358 | ||
f6ac5f3d PA |
3359 | debug_target::debug_target () |
3360 | { | |
3361 | to_stratum = debug_stratum; | |
3362 | } | |
3363 | ||
d9f719f1 PA |
3364 | const target_info & |
3365 | dummy_target::info () const | |
f6ac5f3d | 3366 | { |
d9f719f1 | 3367 | return dummy_target_info; |
f6ac5f3d PA |
3368 | } |
3369 | ||
d9f719f1 PA |
3370 | const target_info & |
3371 | debug_target::info () const | |
f6ac5f3d | 3372 | { |
d9f719f1 | 3373 | return beneath->info (); |
f6ac5f3d PA |
3374 | } |
3375 | ||
c906108c | 3376 | \f |
c906108c | 3377 | |
f1c07ab0 | 3378 | void |
460014f5 | 3379 | target_close (struct target_ops *targ) |
f1c07ab0 | 3380 | { |
7fdc1521 TT |
3381 | gdb_assert (!target_is_pushed (targ)); |
3382 | ||
20db9c52 PA |
3383 | fileio_handles_invalidate_target (targ); |
3384 | ||
f6ac5f3d | 3385 | targ->close (); |
947b8855 PA |
3386 | |
3387 | if (targetdebug) | |
460014f5 | 3388 | fprintf_unfiltered (gdb_stdlog, "target_close ()\n"); |
f1c07ab0 AC |
3389 | } |
3390 | ||
28439f5e PA |
3391 | int |
3392 | target_thread_alive (ptid_t ptid) | |
c906108c | 3393 | { |
8b88a78e | 3394 | return current_top_target ()->thread_alive (ptid); |
28439f5e PA |
3395 | } |
3396 | ||
3397 | void | |
e8032dde | 3398 | target_update_thread_list (void) |
28439f5e | 3399 | { |
8b88a78e | 3400 | current_top_target ()->update_thread_list (); |
c906108c SS |
3401 | } |
3402 | ||
d914c394 SS |
3403 | void |
3404 | target_stop (ptid_t ptid) | |
3405 | { | |
3406 | if (!may_stop) | |
3407 | { | |
3408 | warning (_("May not interrupt or stop the target, ignoring attempt")); | |
3409 | return; | |
3410 | } | |
3411 | ||
8b88a78e | 3412 | current_top_target ()->stop (ptid); |
d914c394 SS |
3413 | } |
3414 | ||
bfedc46a | 3415 | void |
e671cd59 | 3416 | target_interrupt () |
bfedc46a PA |
3417 | { |
3418 | if (!may_stop) | |
3419 | { | |
3420 | warning (_("May not interrupt or stop the target, ignoring attempt")); | |
3421 | return; | |
3422 | } | |
3423 | ||
8b88a78e | 3424 | current_top_target ()->interrupt (); |
bfedc46a PA |
3425 | } |
3426 | ||
abc56d60 PA |
3427 | /* See target.h. */ |
3428 | ||
93692b58 PA |
3429 | void |
3430 | target_pass_ctrlc (void) | |
3431 | { | |
8b88a78e | 3432 | current_top_target ()->pass_ctrlc (); |
93692b58 PA |
3433 | } |
3434 | ||
3435 | /* See target.h. */ | |
3436 | ||
3437 | void | |
3438 | default_target_pass_ctrlc (struct target_ops *ops) | |
3439 | { | |
e671cd59 | 3440 | target_interrupt (); |
93692b58 PA |
3441 | } |
3442 | ||
f8c1d06b GB |
3443 | /* See target/target.h. */ |
3444 | ||
3445 | void | |
03f4463b | 3446 | target_stop_and_wait (ptid_t ptid) |
f8c1d06b GB |
3447 | { |
3448 | struct target_waitstatus status; | |
3449 | int was_non_stop = non_stop; | |
3450 | ||
3451 | non_stop = 1; | |
3452 | target_stop (ptid); | |
3453 | ||
3454 | memset (&status, 0, sizeof (status)); | |
3455 | target_wait (ptid, &status, 0); | |
3456 | ||
3457 | non_stop = was_non_stop; | |
3458 | } | |
3459 | ||
3460 | /* See target/target.h. */ | |
3461 | ||
3462 | void | |
03f4463b | 3463 | target_continue_no_signal (ptid_t ptid) |
f8c1d06b GB |
3464 | { |
3465 | target_resume (ptid, 0, GDB_SIGNAL_0); | |
3466 | } | |
3467 | ||
049a8570 SDJ |
3468 | /* See target/target.h. */ |
3469 | ||
3470 | void | |
3471 | target_continue (ptid_t ptid, enum gdb_signal signal) | |
3472 | { | |
3473 | target_resume (ptid, 0, signal); | |
3474 | } | |
3475 | ||
09826ec5 PA |
3476 | /* Concatenate ELEM to LIST, a comma separate list, and return the |
3477 | result. The LIST incoming argument is released. */ | |
3478 | ||
3479 | static char * | |
3480 | str_comma_list_concat_elem (char *list, const char *elem) | |
3481 | { | |
3482 | if (list == NULL) | |
3483 | return xstrdup (elem); | |
3484 | else | |
3485 | return reconcat (list, list, ", ", elem, (char *) NULL); | |
3486 | } | |
3487 | ||
3488 | /* Helper for target_options_to_string. If OPT is present in | |
3489 | TARGET_OPTIONS, append the OPT_STR (string version of OPT) in RET. | |
3490 | Returns the new resulting string. OPT is removed from | |
3491 | TARGET_OPTIONS. */ | |
3492 | ||
3493 | static char * | |
3494 | do_option (int *target_options, char *ret, | |
a121b7c1 | 3495 | int opt, const char *opt_str) |
09826ec5 PA |
3496 | { |
3497 | if ((*target_options & opt) != 0) | |
3498 | { | |
3499 | ret = str_comma_list_concat_elem (ret, opt_str); | |
3500 | *target_options &= ~opt; | |
3501 | } | |
3502 | ||
3503 | return ret; | |
3504 | } | |
3505 | ||
3506 | char * | |
3507 | target_options_to_string (int target_options) | |
3508 | { | |
3509 | char *ret = NULL; | |
3510 | ||
3511 | #define DO_TARG_OPTION(OPT) \ | |
3512 | ret = do_option (&target_options, ret, OPT, #OPT) | |
3513 | ||
3514 | DO_TARG_OPTION (TARGET_WNOHANG); | |
3515 | ||
3516 | if (target_options != 0) | |
3517 | ret = str_comma_list_concat_elem (ret, "unknown???"); | |
3518 | ||
3519 | if (ret == NULL) | |
3520 | ret = xstrdup (""); | |
3521 | return ret; | |
3522 | } | |
3523 | ||
28439f5e PA |
3524 | void |
3525 | target_fetch_registers (struct regcache *regcache, int regno) | |
c906108c | 3526 | { |
8b88a78e | 3527 | current_top_target ()->fetch_registers (regcache, regno); |
ad5989bd | 3528 | if (targetdebug) |
ef79d9a3 | 3529 | regcache->debug_print_register ("target_fetch_registers", regno); |
c906108c SS |
3530 | } |
3531 | ||
28439f5e PA |
3532 | void |
3533 | target_store_registers (struct regcache *regcache, int regno) | |
c906108c | 3534 | { |
d914c394 SS |
3535 | if (!may_write_registers) |
3536 | error (_("Writing to registers is not allowed (regno %d)"), regno); | |
3537 | ||
8b88a78e | 3538 | current_top_target ()->store_registers (regcache, regno); |
6b84065d | 3539 | if (targetdebug) |
28439f5e | 3540 | { |
ef79d9a3 | 3541 | regcache->debug_print_register ("target_store_registers", regno); |
28439f5e | 3542 | } |
c906108c SS |
3543 | } |
3544 | ||
dc146f7c VP |
3545 | int |
3546 | target_core_of_thread (ptid_t ptid) | |
3547 | { | |
8b88a78e | 3548 | return current_top_target ()->core_of_thread (ptid); |
dc146f7c VP |
3549 | } |
3550 | ||
936d2992 PA |
3551 | int |
3552 | simple_verify_memory (struct target_ops *ops, | |
3553 | const gdb_byte *data, CORE_ADDR lma, ULONGEST size) | |
3554 | { | |
3555 | LONGEST total_xfered = 0; | |
3556 | ||
3557 | while (total_xfered < size) | |
3558 | { | |
3559 | ULONGEST xfered_len; | |
3560 | enum target_xfer_status status; | |
3561 | gdb_byte buf[1024]; | |
768adc05 | 3562 | ULONGEST howmuch = std::min<ULONGEST> (sizeof (buf), size - total_xfered); |
936d2992 PA |
3563 | |
3564 | status = target_xfer_partial (ops, TARGET_OBJECT_MEMORY, NULL, | |
3565 | buf, NULL, lma + total_xfered, howmuch, | |
3566 | &xfered_len); | |
3567 | if (status == TARGET_XFER_OK | |
3568 | && memcmp (data + total_xfered, buf, xfered_len) == 0) | |
3569 | { | |
3570 | total_xfered += xfered_len; | |
3571 | QUIT; | |
3572 | } | |
3573 | else | |
3574 | return 0; | |
3575 | } | |
3576 | return 1; | |
3577 | } | |
3578 | ||
3579 | /* Default implementation of memory verification. */ | |
3580 | ||
3581 | static int | |
3582 | default_verify_memory (struct target_ops *self, | |
3583 | const gdb_byte *data, CORE_ADDR memaddr, ULONGEST size) | |
3584 | { | |
3585 | /* Start over from the top of the target stack. */ | |
8b88a78e | 3586 | return simple_verify_memory (current_top_target (), |
936d2992 PA |
3587 | data, memaddr, size); |
3588 | } | |
3589 | ||
4a5e7a5b PA |
3590 | int |
3591 | target_verify_memory (const gdb_byte *data, CORE_ADDR memaddr, ULONGEST size) | |
3592 | { | |
8b88a78e | 3593 | return current_top_target ()->verify_memory (data, memaddr, size); |
4a5e7a5b PA |
3594 | } |
3595 | ||
9c06b0b4 TJB |
3596 | /* The documentation for this function is in its prototype declaration in |
3597 | target.h. */ | |
3598 | ||
3599 | int | |
f4b0a671 SM |
3600 | target_insert_mask_watchpoint (CORE_ADDR addr, CORE_ADDR mask, |
3601 | enum target_hw_bp_type rw) | |
9c06b0b4 | 3602 | { |
8b88a78e | 3603 | return current_top_target ()->insert_mask_watchpoint (addr, mask, rw); |
9c06b0b4 TJB |
3604 | } |
3605 | ||
3606 | /* The documentation for this function is in its prototype declaration in | |
3607 | target.h. */ | |
3608 | ||
3609 | int | |
f4b0a671 SM |
3610 | target_remove_mask_watchpoint (CORE_ADDR addr, CORE_ADDR mask, |
3611 | enum target_hw_bp_type rw) | |
9c06b0b4 | 3612 | { |
8b88a78e | 3613 | return current_top_target ()->remove_mask_watchpoint (addr, mask, rw); |
9c06b0b4 TJB |
3614 | } |
3615 | ||
3616 | /* The documentation for this function is in its prototype declaration | |
3617 | in target.h. */ | |
3618 | ||
3619 | int | |
3620 | target_masked_watch_num_registers (CORE_ADDR addr, CORE_ADDR mask) | |
3621 | { | |
8b88a78e | 3622 | return current_top_target ()->masked_watch_num_registers (addr, mask); |
9c06b0b4 TJB |
3623 | } |
3624 | ||
f1310107 TJB |
3625 | /* The documentation for this function is in its prototype declaration |
3626 | in target.h. */ | |
3627 | ||
3628 | int | |
3629 | target_ranged_break_num_registers (void) | |
3630 | { | |
8b88a78e | 3631 | return current_top_target ()->ranged_break_num_registers (); |
f1310107 TJB |
3632 | } |
3633 | ||
02d27625 MM |
3634 | /* See target.h. */ |
3635 | ||
02d27625 | 3636 | struct btrace_target_info * |
f4abbc16 | 3637 | target_enable_btrace (ptid_t ptid, const struct btrace_config *conf) |
02d27625 | 3638 | { |
8b88a78e | 3639 | return current_top_target ()->enable_btrace (ptid, conf); |
02d27625 MM |
3640 | } |
3641 | ||
3642 | /* See target.h. */ | |
3643 | ||
3644 | void | |
3645 | target_disable_btrace (struct btrace_target_info *btinfo) | |
3646 | { | |
8b88a78e | 3647 | current_top_target ()->disable_btrace (btinfo); |
02d27625 MM |
3648 | } |
3649 | ||
3650 | /* See target.h. */ | |
3651 | ||
3652 | void | |
3653 | target_teardown_btrace (struct btrace_target_info *btinfo) | |
3654 | { | |
8b88a78e | 3655 | current_top_target ()->teardown_btrace (btinfo); |
02d27625 MM |
3656 | } |
3657 | ||
3658 | /* See target.h. */ | |
3659 | ||
969c39fb | 3660 | enum btrace_error |
734b0e4b | 3661 | target_read_btrace (struct btrace_data *btrace, |
969c39fb | 3662 | struct btrace_target_info *btinfo, |
02d27625 MM |
3663 | enum btrace_read_type type) |
3664 | { | |
8b88a78e | 3665 | return current_top_target ()->read_btrace (btrace, btinfo, type); |
02d27625 MM |
3666 | } |
3667 | ||
d02ed0bb MM |
3668 | /* See target.h. */ |
3669 | ||
f4abbc16 MM |
3670 | const struct btrace_config * |
3671 | target_btrace_conf (const struct btrace_target_info *btinfo) | |
3672 | { | |
8b88a78e | 3673 | return current_top_target ()->btrace_conf (btinfo); |
f4abbc16 MM |
3674 | } |
3675 | ||
3676 | /* See target.h. */ | |
3677 | ||
7c1687a9 MM |
3678 | void |
3679 | target_stop_recording (void) | |
3680 | { | |
8b88a78e | 3681 | current_top_target ()->stop_recording (); |
7c1687a9 MM |
3682 | } |
3683 | ||
3684 | /* See target.h. */ | |
3685 | ||
d02ed0bb | 3686 | void |
85e1311a | 3687 | target_save_record (const char *filename) |
d02ed0bb | 3688 | { |
8b88a78e | 3689 | current_top_target ()->save_record (filename); |
d02ed0bb MM |
3690 | } |
3691 | ||
3692 | /* See target.h. */ | |
3693 | ||
3694 | int | |
f6ac5f3d | 3695 | target_supports_delete_record () |
d02ed0bb | 3696 | { |
8b88a78e | 3697 | return current_top_target ()->supports_delete_record (); |
d02ed0bb MM |
3698 | } |
3699 | ||
3700 | /* See target.h. */ | |
3701 | ||
3702 | void | |
3703 | target_delete_record (void) | |
3704 | { | |
8b88a78e | 3705 | current_top_target ()->delete_record (); |
d02ed0bb MM |
3706 | } |
3707 | ||
3708 | /* See target.h. */ | |
3709 | ||
b158a20f TW |
3710 | enum record_method |
3711 | target_record_method (ptid_t ptid) | |
3712 | { | |
8b88a78e | 3713 | return current_top_target ()->record_method (ptid); |
b158a20f TW |
3714 | } |
3715 | ||
3716 | /* See target.h. */ | |
3717 | ||
d02ed0bb | 3718 | int |
a52eab48 | 3719 | target_record_is_replaying (ptid_t ptid) |
d02ed0bb | 3720 | { |
8b88a78e | 3721 | return current_top_target ()->record_is_replaying (ptid); |
d02ed0bb MM |
3722 | } |
3723 | ||
3724 | /* See target.h. */ | |
3725 | ||
7ff27e9b MM |
3726 | int |
3727 | target_record_will_replay (ptid_t ptid, int dir) | |
3728 | { | |
8b88a78e | 3729 | return current_top_target ()->record_will_replay (ptid, dir); |
7ff27e9b MM |
3730 | } |
3731 | ||
3732 | /* See target.h. */ | |
3733 | ||
797094dd MM |
3734 | void |
3735 | target_record_stop_replaying (void) | |
3736 | { | |
8b88a78e | 3737 | current_top_target ()->record_stop_replaying (); |
797094dd MM |
3738 | } |
3739 | ||
3740 | /* See target.h. */ | |
3741 | ||
d02ed0bb MM |
3742 | void |
3743 | target_goto_record_begin (void) | |
3744 | { | |
8b88a78e | 3745 | current_top_target ()->goto_record_begin (); |
d02ed0bb MM |
3746 | } |
3747 | ||
3748 | /* See target.h. */ | |
3749 | ||
3750 | void | |
3751 | target_goto_record_end (void) | |
3752 | { | |
8b88a78e | 3753 | current_top_target ()->goto_record_end (); |
d02ed0bb MM |
3754 | } |
3755 | ||
3756 | /* See target.h. */ | |
3757 | ||
3758 | void | |
3759 | target_goto_record (ULONGEST insn) | |
3760 | { | |
8b88a78e | 3761 | current_top_target ()->goto_record (insn); |
d02ed0bb MM |
3762 | } |
3763 | ||
67c86d06 MM |
3764 | /* See target.h. */ |
3765 | ||
3766 | void | |
9a24775b | 3767 | target_insn_history (int size, gdb_disassembly_flags flags) |
67c86d06 | 3768 | { |
8b88a78e | 3769 | current_top_target ()->insn_history (size, flags); |
67c86d06 MM |
3770 | } |
3771 | ||
3772 | /* See target.h. */ | |
3773 | ||
3774 | void | |
9a24775b PA |
3775 | target_insn_history_from (ULONGEST from, int size, |
3776 | gdb_disassembly_flags flags) | |
67c86d06 | 3777 | { |
8b88a78e | 3778 | current_top_target ()->insn_history_from (from, size, flags); |
67c86d06 MM |
3779 | } |
3780 | ||
3781 | /* See target.h. */ | |
3782 | ||
3783 | void | |
9a24775b PA |
3784 | target_insn_history_range (ULONGEST begin, ULONGEST end, |
3785 | gdb_disassembly_flags flags) | |
67c86d06 | 3786 | { |
8b88a78e | 3787 | current_top_target ()->insn_history_range (begin, end, flags); |
67c86d06 MM |
3788 | } |
3789 | ||
15984c13 MM |
3790 | /* See target.h. */ |
3791 | ||
3792 | void | |
0cb7c7b0 | 3793 | target_call_history (int size, record_print_flags flags) |
15984c13 | 3794 | { |
8b88a78e | 3795 | current_top_target ()->call_history (size, flags); |
15984c13 MM |
3796 | } |
3797 | ||
3798 | /* See target.h. */ | |
3799 | ||
3800 | void | |
0cb7c7b0 | 3801 | target_call_history_from (ULONGEST begin, int size, record_print_flags flags) |
15984c13 | 3802 | { |
8b88a78e | 3803 | current_top_target ()->call_history_from (begin, size, flags); |
15984c13 MM |
3804 | } |
3805 | ||
3806 | /* See target.h. */ | |
3807 | ||
3808 | void | |
0cb7c7b0 | 3809 | target_call_history_range (ULONGEST begin, ULONGEST end, record_print_flags flags) |
15984c13 | 3810 | { |
8b88a78e | 3811 | current_top_target ()->call_history_range (begin, end, flags); |
15984c13 MM |
3812 | } |
3813 | ||
ea001bdc MM |
3814 | /* See target.h. */ |
3815 | ||
3816 | const struct frame_unwind * | |
3817 | target_get_unwinder (void) | |
3818 | { | |
8b88a78e | 3819 | return current_top_target ()->get_unwinder (); |
ea001bdc MM |
3820 | } |
3821 | ||
3822 | /* See target.h. */ | |
3823 | ||
3824 | const struct frame_unwind * | |
3825 | target_get_tailcall_unwinder (void) | |
3826 | { | |
8b88a78e | 3827 | return current_top_target ()->get_tailcall_unwinder (); |
ea001bdc MM |
3828 | } |
3829 | ||
5fff78c4 MM |
3830 | /* See target.h. */ |
3831 | ||
3832 | void | |
3833 | target_prepare_to_generate_core (void) | |
3834 | { | |
8b88a78e | 3835 | current_top_target ()->prepare_to_generate_core (); |
5fff78c4 MM |
3836 | } |
3837 | ||
3838 | /* See target.h. */ | |
3839 | ||
3840 | void | |
3841 | target_done_generating_core (void) | |
3842 | { | |
8b88a78e | 3843 | current_top_target ()->done_generating_core (); |
5fff78c4 MM |
3844 | } |
3845 | ||
c906108c | 3846 | \f |
c5aa993b JM |
3847 | |
3848 | static char targ_desc[] = | |
3e43a32a MS |
3849 | "Names of targets and files being debugged.\nShows the entire \ |
3850 | stack of targets currently in use (including the exec-file,\n\ | |
c906108c SS |
3851 | core-file, and process, if any), as well as the symbol file name."; |
3852 | ||
a53f3625 | 3853 | static void |
a30bf1f1 TT |
3854 | default_rcmd (struct target_ops *self, const char *command, |
3855 | struct ui_file *output) | |
a53f3625 TT |
3856 | { |
3857 | error (_("\"monitor\" command not supported by this target.")); | |
3858 | } | |
3859 | ||
96baa820 | 3860 | static void |
0b39b52e | 3861 | do_monitor_command (const char *cmd, int from_tty) |
96baa820 | 3862 | { |
96baa820 JM |
3863 | target_rcmd (cmd, gdb_stdtarg); |
3864 | } | |
3865 | ||
78cbbba8 LM |
3866 | /* Erases all the memory regions marked as flash. CMD and FROM_TTY are |
3867 | ignored. */ | |
3868 | ||
3869 | void | |
0b39b52e | 3870 | flash_erase_command (const char *cmd, int from_tty) |
78cbbba8 LM |
3871 | { |
3872 | /* Used to communicate termination of flash operations to the target. */ | |
3873 | bool found_flash_region = false; | |
78cbbba8 LM |
3874 | struct gdbarch *gdbarch = target_gdbarch (); |
3875 | ||
a664f67e | 3876 | std::vector<mem_region> mem_regions = target_memory_map (); |
78cbbba8 LM |
3877 | |
3878 | /* Iterate over all memory regions. */ | |
a664f67e | 3879 | for (const mem_region &m : mem_regions) |
78cbbba8 | 3880 | { |
78cbbba8 | 3881 | /* Is this a flash memory region? */ |
a664f67e | 3882 | if (m.attrib.mode == MEM_FLASH) |
78cbbba8 LM |
3883 | { |
3884 | found_flash_region = true; | |
a664f67e | 3885 | target_flash_erase (m.lo, m.hi - m.lo); |
78cbbba8 | 3886 | |
76f9c9cf | 3887 | ui_out_emit_tuple tuple_emitter (current_uiout, "erased-regions"); |
78cbbba8 LM |
3888 | |
3889 | current_uiout->message (_("Erasing flash memory region at address ")); | |
a664f67e | 3890 | current_uiout->field_fmt ("address", "%s", paddress (gdbarch, m.lo)); |
78cbbba8 | 3891 | current_uiout->message (", size = "); |
a664f67e | 3892 | current_uiout->field_fmt ("size", "%s", hex_string (m.hi - m.lo)); |
78cbbba8 | 3893 | current_uiout->message ("\n"); |
78cbbba8 LM |
3894 | } |
3895 | } | |
3896 | ||
3897 | /* Did we do any flash operations? If so, we need to finalize them. */ | |
3898 | if (found_flash_region) | |
3899 | target_flash_done (); | |
3900 | else | |
3901 | current_uiout->message (_("No flash memory regions found.\n")); | |
3902 | } | |
3903 | ||
87680a14 JB |
3904 | /* Print the name of each layers of our target stack. */ |
3905 | ||
3906 | static void | |
d3cb6b99 | 3907 | maintenance_print_target_stack (const char *cmd, int from_tty) |
87680a14 JB |
3908 | { |
3909 | struct target_ops *t; | |
3910 | ||
3911 | printf_filtered (_("The current target stack is:\n")); | |
3912 | ||
8b88a78e | 3913 | for (t = current_top_target (); t != NULL; t = t->beneath) |
87680a14 | 3914 | { |
f6ac5f3d PA |
3915 | if (t->to_stratum == debug_stratum) |
3916 | continue; | |
3917 | printf_filtered (" - %s (%s)\n", t->shortname (), t->longname ()); | |
87680a14 JB |
3918 | } |
3919 | } | |
3920 | ||
372316f1 PA |
3921 | /* See target.h. */ |
3922 | ||
3923 | void | |
3924 | target_async (int enable) | |
3925 | { | |
3926 | infrun_async (enable); | |
8b88a78e | 3927 | current_top_target ()->async (enable); |
372316f1 PA |
3928 | } |
3929 | ||
65706a29 PA |
3930 | /* See target.h. */ |
3931 | ||
3932 | void | |
3933 | target_thread_events (int enable) | |
3934 | { | |
8b88a78e | 3935 | current_top_target ()->thread_events (enable); |
65706a29 PA |
3936 | } |
3937 | ||
329ea579 PA |
3938 | /* Controls if targets can report that they can/are async. This is |
3939 | just for maintainers to use when debugging gdb. */ | |
3940 | int target_async_permitted = 1; | |
c6ebd6cf VP |
3941 | |
3942 | /* The set command writes to this variable. If the inferior is | |
b5419e49 | 3943 | executing, target_async_permitted is *not* updated. */ |
329ea579 | 3944 | static int target_async_permitted_1 = 1; |
c6ebd6cf VP |
3945 | |
3946 | static void | |
eb4c3f4a | 3947 | maint_set_target_async_command (const char *args, int from_tty, |
329ea579 | 3948 | struct cmd_list_element *c) |
c6ebd6cf | 3949 | { |
c35b1492 | 3950 | if (have_live_inferiors ()) |
c6ebd6cf VP |
3951 | { |
3952 | target_async_permitted_1 = target_async_permitted; | |
3953 | error (_("Cannot change this setting while the inferior is running.")); | |
3954 | } | |
3955 | ||
3956 | target_async_permitted = target_async_permitted_1; | |
3957 | } | |
3958 | ||
3959 | static void | |
329ea579 PA |
3960 | maint_show_target_async_command (struct ui_file *file, int from_tty, |
3961 | struct cmd_list_element *c, | |
3962 | const char *value) | |
c6ebd6cf | 3963 | { |
3e43a32a MS |
3964 | fprintf_filtered (file, |
3965 | _("Controlling the inferior in " | |
3966 | "asynchronous mode is %s.\n"), value); | |
c6ebd6cf VP |
3967 | } |
3968 | ||
fbea99ea PA |
3969 | /* Return true if the target operates in non-stop mode even with "set |
3970 | non-stop off". */ | |
3971 | ||
3972 | static int | |
3973 | target_always_non_stop_p (void) | |
3974 | { | |
8b88a78e | 3975 | return current_top_target ()->always_non_stop_p (); |
fbea99ea PA |
3976 | } |
3977 | ||
3978 | /* See target.h. */ | |
3979 | ||
3980 | int | |
3981 | target_is_non_stop_p (void) | |
3982 | { | |
3983 | return (non_stop | |
3984 | || target_non_stop_enabled == AUTO_BOOLEAN_TRUE | |
3985 | || (target_non_stop_enabled == AUTO_BOOLEAN_AUTO | |
3986 | && target_always_non_stop_p ())); | |
3987 | } | |
3988 | ||
3989 | /* Controls if targets can report that they always run in non-stop | |
3990 | mode. This is just for maintainers to use when debugging gdb. */ | |
3991 | enum auto_boolean target_non_stop_enabled = AUTO_BOOLEAN_AUTO; | |
3992 | ||
3993 | /* The set command writes to this variable. If the inferior is | |
3994 | executing, target_non_stop_enabled is *not* updated. */ | |
3995 | static enum auto_boolean target_non_stop_enabled_1 = AUTO_BOOLEAN_AUTO; | |
3996 | ||
3997 | /* Implementation of "maint set target-non-stop". */ | |
3998 | ||
3999 | static void | |
eb4c3f4a | 4000 | maint_set_target_non_stop_command (const char *args, int from_tty, |
fbea99ea PA |
4001 | struct cmd_list_element *c) |
4002 | { | |
4003 | if (have_live_inferiors ()) | |
4004 | { | |
4005 | target_non_stop_enabled_1 = target_non_stop_enabled; | |
4006 | error (_("Cannot change this setting while the inferior is running.")); | |
4007 | } | |
4008 | ||
4009 | target_non_stop_enabled = target_non_stop_enabled_1; | |
4010 | } | |
4011 | ||
4012 | /* Implementation of "maint show target-non-stop". */ | |
4013 | ||
4014 | static void | |
4015 | maint_show_target_non_stop_command (struct ui_file *file, int from_tty, | |
4016 | struct cmd_list_element *c, | |
4017 | const char *value) | |
4018 | { | |
4019 | if (target_non_stop_enabled == AUTO_BOOLEAN_AUTO) | |
4020 | fprintf_filtered (file, | |
4021 | _("Whether the target is always in non-stop mode " | |
4022 | "is %s (currently %s).\n"), value, | |
4023 | target_always_non_stop_p () ? "on" : "off"); | |
4024 | else | |
4025 | fprintf_filtered (file, | |
4026 | _("Whether the target is always in non-stop mode " | |
4027 | "is %s.\n"), value); | |
4028 | } | |
4029 | ||
d914c394 SS |
4030 | /* Temporary copies of permission settings. */ |
4031 | ||
4032 | static int may_write_registers_1 = 1; | |
4033 | static int may_write_memory_1 = 1; | |
4034 | static int may_insert_breakpoints_1 = 1; | |
4035 | static int may_insert_tracepoints_1 = 1; | |
4036 | static int may_insert_fast_tracepoints_1 = 1; | |
4037 | static int may_stop_1 = 1; | |
4038 | ||
4039 | /* Make the user-set values match the real values again. */ | |
4040 | ||
4041 | void | |
4042 | update_target_permissions (void) | |
4043 | { | |
4044 | may_write_registers_1 = may_write_registers; | |
4045 | may_write_memory_1 = may_write_memory; | |
4046 | may_insert_breakpoints_1 = may_insert_breakpoints; | |
4047 | may_insert_tracepoints_1 = may_insert_tracepoints; | |
4048 | may_insert_fast_tracepoints_1 = may_insert_fast_tracepoints; | |
4049 | may_stop_1 = may_stop; | |
4050 | } | |
4051 | ||
4052 | /* The one function handles (most of) the permission flags in the same | |
4053 | way. */ | |
4054 | ||
4055 | static void | |
eb4c3f4a | 4056 | set_target_permissions (const char *args, int from_tty, |
d914c394 SS |
4057 | struct cmd_list_element *c) |
4058 | { | |
4059 | if (target_has_execution) | |
4060 | { | |
4061 | update_target_permissions (); | |
4062 | error (_("Cannot change this setting while the inferior is running.")); | |
4063 | } | |
4064 | ||
4065 | /* Make the real values match the user-changed values. */ | |
4066 | may_write_registers = may_write_registers_1; | |
4067 | may_insert_breakpoints = may_insert_breakpoints_1; | |
4068 | may_insert_tracepoints = may_insert_tracepoints_1; | |
4069 | may_insert_fast_tracepoints = may_insert_fast_tracepoints_1; | |
4070 | may_stop = may_stop_1; | |
4071 | update_observer_mode (); | |
4072 | } | |
4073 | ||
4074 | /* Set memory write permission independently of observer mode. */ | |
4075 | ||
4076 | static void | |
eb4c3f4a | 4077 | set_write_memory_permission (const char *args, int from_tty, |
d914c394 SS |
4078 | struct cmd_list_element *c) |
4079 | { | |
4080 | /* Make the real values match the user-changed values. */ | |
4081 | may_write_memory = may_write_memory_1; | |
4082 | update_observer_mode (); | |
4083 | } | |
4084 | ||
c906108c | 4085 | void |
fba45db2 | 4086 | initialize_targets (void) |
c906108c | 4087 | { |
f6ac5f3d PA |
4088 | the_dummy_target = new dummy_target (); |
4089 | push_target (the_dummy_target); | |
4090 | ||
4091 | the_debug_target = new debug_target (); | |
c906108c | 4092 | |
11db9430 SM |
4093 | add_info ("target", info_target_command, targ_desc); |
4094 | add_info ("files", info_target_command, targ_desc); | |
c906108c | 4095 | |
ccce17b0 | 4096 | add_setshow_zuinteger_cmd ("target", class_maintenance, &targetdebug, _("\ |
85c07804 AC |
4097 | Set target debugging."), _("\ |
4098 | Show target debugging."), _("\ | |
333dabeb | 4099 | When non-zero, target debugging is enabled. Higher numbers are more\n\ |
3cecbbbe TT |
4100 | verbose."), |
4101 | set_targetdebug, | |
ccce17b0 YQ |
4102 | show_targetdebug, |
4103 | &setdebuglist, &showdebuglist); | |
3a11626d | 4104 | |
2bc416ba | 4105 | add_setshow_boolean_cmd ("trust-readonly-sections", class_support, |
7915a72c AC |
4106 | &trust_readonly, _("\ |
4107 | Set mode for reading from readonly sections."), _("\ | |
4108 | Show mode for reading from readonly sections."), _("\ | |
3a11626d MS |
4109 | When this mode is on, memory reads from readonly sections (such as .text)\n\ |
4110 | will be read from the object file instead of from the target. This will\n\ | |
7915a72c | 4111 | result in significant performance improvement for remote targets."), |
2c5b56ce | 4112 | NULL, |
920d2a44 | 4113 | show_trust_readonly, |
e707bbc2 | 4114 | &setlist, &showlist); |
96baa820 JM |
4115 | |
4116 | add_com ("monitor", class_obscure, do_monitor_command, | |
1bedd215 | 4117 | _("Send a command to the remote monitor (remote targets only).")); |
96baa820 | 4118 | |
87680a14 JB |
4119 | add_cmd ("target-stack", class_maintenance, maintenance_print_target_stack, |
4120 | _("Print the name of each layer of the internal target stack."), | |
4121 | &maintenanceprintlist); | |
4122 | ||
c6ebd6cf VP |
4123 | add_setshow_boolean_cmd ("target-async", no_class, |
4124 | &target_async_permitted_1, _("\ | |
4125 | Set whether gdb controls the inferior in asynchronous mode."), _("\ | |
4126 | Show whether gdb controls the inferior in asynchronous mode."), _("\ | |
4127 | Tells gdb whether to control the inferior in asynchronous mode."), | |
329ea579 PA |
4128 | maint_set_target_async_command, |
4129 | maint_show_target_async_command, | |
4130 | &maintenance_set_cmdlist, | |
4131 | &maintenance_show_cmdlist); | |
c6ebd6cf | 4132 | |
fbea99ea PA |
4133 | add_setshow_auto_boolean_cmd ("target-non-stop", no_class, |
4134 | &target_non_stop_enabled_1, _("\ | |
4135 | Set whether gdb always controls the inferior in non-stop mode."), _("\ | |
4136 | Show whether gdb always controls the inferior in non-stop mode."), _("\ | |
4137 | Tells gdb whether to control the inferior in non-stop mode."), | |
4138 | maint_set_target_non_stop_command, | |
4139 | maint_show_target_non_stop_command, | |
4140 | &maintenance_set_cmdlist, | |
4141 | &maintenance_show_cmdlist); | |
4142 | ||
d914c394 SS |
4143 | add_setshow_boolean_cmd ("may-write-registers", class_support, |
4144 | &may_write_registers_1, _("\ | |
4145 | Set permission to write into registers."), _("\ | |
4146 | Show permission to write into registers."), _("\ | |
4147 | When this permission is on, GDB may write into the target's registers.\n\ | |
4148 | Otherwise, any sort of write attempt will result in an error."), | |
4149 | set_target_permissions, NULL, | |
4150 | &setlist, &showlist); | |
4151 | ||
4152 | add_setshow_boolean_cmd ("may-write-memory", class_support, | |
4153 | &may_write_memory_1, _("\ | |
4154 | Set permission to write into target memory."), _("\ | |
4155 | Show permission to write into target memory."), _("\ | |
4156 | When this permission is on, GDB may write into the target's memory.\n\ | |
4157 | Otherwise, any sort of write attempt will result in an error."), | |
4158 | set_write_memory_permission, NULL, | |
4159 | &setlist, &showlist); | |
4160 | ||
4161 | add_setshow_boolean_cmd ("may-insert-breakpoints", class_support, | |
4162 | &may_insert_breakpoints_1, _("\ | |
4163 | Set permission to insert breakpoints in the target."), _("\ | |
4164 | Show permission to insert breakpoints in the target."), _("\ | |
4165 | When this permission is on, GDB may insert breakpoints in the program.\n\ | |
4166 | Otherwise, any sort of insertion attempt will result in an error."), | |
4167 | set_target_permissions, NULL, | |
4168 | &setlist, &showlist); | |
4169 | ||
4170 | add_setshow_boolean_cmd ("may-insert-tracepoints", class_support, | |
4171 | &may_insert_tracepoints_1, _("\ | |
4172 | Set permission to insert tracepoints in the target."), _("\ | |
4173 | Show permission to insert tracepoints in the target."), _("\ | |
4174 | When this permission is on, GDB may insert tracepoints in the program.\n\ | |
4175 | Otherwise, any sort of insertion attempt will result in an error."), | |
4176 | set_target_permissions, NULL, | |
4177 | &setlist, &showlist); | |
4178 | ||
4179 | add_setshow_boolean_cmd ("may-insert-fast-tracepoints", class_support, | |
4180 | &may_insert_fast_tracepoints_1, _("\ | |
4181 | Set permission to insert fast tracepoints in the target."), _("\ | |
4182 | Show permission to insert fast tracepoints in the target."), _("\ | |
4183 | When this permission is on, GDB may insert fast tracepoints.\n\ | |
4184 | Otherwise, any sort of insertion attempt will result in an error."), | |
4185 | set_target_permissions, NULL, | |
4186 | &setlist, &showlist); | |
4187 | ||
4188 | add_setshow_boolean_cmd ("may-interrupt", class_support, | |
4189 | &may_stop_1, _("\ | |
4190 | Set permission to interrupt or signal the target."), _("\ | |
4191 | Show permission to interrupt or signal the target."), _("\ | |
4192 | When this permission is on, GDB may interrupt/stop the target's execution.\n\ | |
4193 | Otherwise, any attempt to interrupt or stop will be ignored."), | |
4194 | set_target_permissions, NULL, | |
4195 | &setlist, &showlist); | |
6a3cb8e8 | 4196 | |
78cbbba8 LM |
4197 | add_com ("flash-erase", no_class, flash_erase_command, |
4198 | _("Erase all flash memory regions.")); | |
4199 | ||
6a3cb8e8 PA |
4200 | add_setshow_boolean_cmd ("auto-connect-native-target", class_support, |
4201 | &auto_connect_native_target, _("\ | |
4202 | Set whether GDB may automatically connect to the native target."), _("\ | |
4203 | Show whether GDB may automatically connect to the native target."), _("\ | |
4204 | When on, and GDB is not connected to a target yet, GDB\n\ | |
4205 | attempts \"run\" and other commands with the native target."), | |
4206 | NULL, show_auto_connect_native_target, | |
4207 | &setlist, &showlist); | |
c906108c | 4208 | } |