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 | 121 | |
a1740ee1 PA |
122 | /* The target stack. */ |
123 | ||
124 | static target_stack g_target_stack; | |
125 | ||
c906108c | 126 | /* Top of target stack. */ |
c906108c SS |
127 | /* The target structure we are currently using to talk to a process |
128 | or file or whatever "inferior" we have. */ | |
129 | ||
8b88a78e PA |
130 | target_ops * |
131 | current_top_target () | |
132 | { | |
a1740ee1 | 133 | return g_target_stack.top (); |
8b88a78e | 134 | } |
c906108c SS |
135 | |
136 | /* Command list for target. */ | |
137 | ||
138 | static struct cmd_list_element *targetlist = NULL; | |
139 | ||
cf7a04e8 DJ |
140 | /* Nonzero if we should trust readonly sections from the |
141 | executable when reading memory. */ | |
142 | ||
143 | static int trust_readonly = 0; | |
144 | ||
8defab1a DJ |
145 | /* Nonzero if we should show true memory content including |
146 | memory breakpoint inserted by gdb. */ | |
147 | ||
148 | static int show_memory_breakpoints = 0; | |
149 | ||
d914c394 SS |
150 | /* These globals control whether GDB attempts to perform these |
151 | operations; they are useful for targets that need to prevent | |
152 | inadvertant disruption, such as in non-stop mode. */ | |
153 | ||
154 | int may_write_registers = 1; | |
155 | ||
156 | int may_write_memory = 1; | |
157 | ||
158 | int may_insert_breakpoints = 1; | |
159 | ||
160 | int may_insert_tracepoints = 1; | |
161 | ||
162 | int may_insert_fast_tracepoints = 1; | |
163 | ||
164 | int may_stop = 1; | |
165 | ||
c906108c SS |
166 | /* Non-zero if we want to see trace of target level stuff. */ |
167 | ||
ccce17b0 | 168 | static unsigned int targetdebug = 0; |
3cecbbbe TT |
169 | |
170 | static void | |
eb4c3f4a | 171 | set_targetdebug (const char *args, int from_tty, struct cmd_list_element *c) |
3cecbbbe | 172 | { |
f6ac5f3d PA |
173 | if (targetdebug) |
174 | push_target (the_debug_target); | |
175 | else | |
176 | unpush_target (the_debug_target); | |
3cecbbbe TT |
177 | } |
178 | ||
920d2a44 AC |
179 | static void |
180 | show_targetdebug (struct ui_file *file, int from_tty, | |
181 | struct cmd_list_element *c, const char *value) | |
182 | { | |
183 | fprintf_filtered (file, _("Target debugging is %s.\n"), value); | |
184 | } | |
c906108c | 185 | |
c906108c SS |
186 | /* The user just typed 'target' without the name of a target. */ |
187 | ||
c906108c | 188 | static void |
981a3fb3 | 189 | target_command (const char *arg, int from_tty) |
c906108c SS |
190 | { |
191 | fputs_filtered ("Argument required (target name). Try `help target'\n", | |
192 | gdb_stdout); | |
193 | } | |
194 | ||
d9f719f1 PA |
195 | #if GDB_SELF_TEST |
196 | namespace selftests { | |
197 | ||
198 | /* A mock process_stratum target_ops that doesn't read/write registers | |
199 | anywhere. */ | |
200 | ||
201 | static const target_info test_target_info = { | |
202 | "test", | |
203 | N_("unit tests target"), | |
204 | N_("You should never see this"), | |
205 | }; | |
206 | ||
207 | const target_info & | |
208 | test_target_ops::info () const | |
209 | { | |
210 | return test_target_info; | |
211 | } | |
212 | ||
213 | } /* namespace selftests */ | |
214 | #endif /* GDB_SELF_TEST */ | |
215 | ||
c35b1492 PA |
216 | /* Default target_has_* methods for process_stratum targets. */ |
217 | ||
218 | int | |
f6ac5f3d | 219 | default_child_has_all_memory () |
c35b1492 PA |
220 | { |
221 | /* If no inferior selected, then we can't read memory here. */ | |
d7e15655 | 222 | if (inferior_ptid == null_ptid) |
c35b1492 PA |
223 | return 0; |
224 | ||
225 | return 1; | |
226 | } | |
227 | ||
228 | int | |
f6ac5f3d | 229 | default_child_has_memory () |
c35b1492 PA |
230 | { |
231 | /* If no inferior selected, then we can't read memory here. */ | |
d7e15655 | 232 | if (inferior_ptid == null_ptid) |
c35b1492 PA |
233 | return 0; |
234 | ||
235 | return 1; | |
236 | } | |
237 | ||
238 | int | |
f6ac5f3d | 239 | default_child_has_stack () |
c35b1492 PA |
240 | { |
241 | /* If no inferior selected, there's no stack. */ | |
d7e15655 | 242 | if (inferior_ptid == null_ptid) |
c35b1492 PA |
243 | return 0; |
244 | ||
245 | return 1; | |
246 | } | |
247 | ||
248 | int | |
f6ac5f3d | 249 | default_child_has_registers () |
c35b1492 PA |
250 | { |
251 | /* Can't read registers from no inferior. */ | |
d7e15655 | 252 | if (inferior_ptid == null_ptid) |
c35b1492 PA |
253 | return 0; |
254 | ||
255 | return 1; | |
256 | } | |
257 | ||
258 | int | |
f6ac5f3d | 259 | default_child_has_execution (ptid_t the_ptid) |
c35b1492 PA |
260 | { |
261 | /* If there's no thread selected, then we can't make it run through | |
262 | hoops. */ | |
d7e15655 | 263 | if (the_ptid == null_ptid) |
c35b1492 PA |
264 | return 0; |
265 | ||
266 | return 1; | |
267 | } | |
268 | ||
269 | ||
270 | int | |
271 | target_has_all_memory_1 (void) | |
272 | { | |
b6a8c27b | 273 | for (target_ops *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 | { | |
b6a8c27b | 283 | for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
f6ac5f3d | 284 | if (t->has_memory ()) |
c35b1492 PA |
285 | return 1; |
286 | ||
287 | return 0; | |
288 | } | |
289 | ||
290 | int | |
291 | target_has_stack_1 (void) | |
292 | { | |
b6a8c27b | 293 | for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
f6ac5f3d | 294 | if (t->has_stack ()) |
c35b1492 PA |
295 | return 1; |
296 | ||
297 | return 0; | |
298 | } | |
299 | ||
300 | int | |
301 | target_has_registers_1 (void) | |
302 | { | |
b6a8c27b | 303 | for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
f6ac5f3d | 304 | if (t->has_registers ()) |
c35b1492 PA |
305 | return 1; |
306 | ||
307 | return 0; | |
308 | } | |
309 | ||
310 | int | |
aeaec162 | 311 | target_has_execution_1 (ptid_t the_ptid) |
c35b1492 | 312 | { |
b6a8c27b | 313 | for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
f6ac5f3d | 314 | if (t->has_execution (the_ptid)) |
c35b1492 PA |
315 | return 1; |
316 | ||
317 | return 0; | |
318 | } | |
319 | ||
aeaec162 TT |
320 | int |
321 | target_has_execution_current (void) | |
322 | { | |
323 | return target_has_execution_1 (inferior_ptid); | |
324 | } | |
325 | ||
8981c758 TT |
326 | /* This is used to implement the various target commands. */ |
327 | ||
328 | static void | |
eb4c3f4a | 329 | open_target (const char *args, int from_tty, struct cmd_list_element *command) |
8981c758 | 330 | { |
d9f719f1 PA |
331 | auto *ti = static_cast<target_info *> (get_cmd_context (command)); |
332 | target_open_ftype *func = target_factories[ti]; | |
8981c758 TT |
333 | |
334 | if (targetdebug) | |
d9f719f1 PA |
335 | fprintf_unfiltered (gdb_stdlog, "-> %s->open (...)\n", |
336 | ti->shortname); | |
8981c758 | 337 | |
d9f719f1 | 338 | func (args, from_tty); |
8981c758 TT |
339 | |
340 | if (targetdebug) | |
d9f719f1 PA |
341 | fprintf_unfiltered (gdb_stdlog, "<- %s->open (%s, %d)\n", |
342 | ti->shortname, args, from_tty); | |
8981c758 TT |
343 | } |
344 | ||
d9f719f1 | 345 | /* See target.h. */ |
c22a2b88 TT |
346 | |
347 | void | |
d9f719f1 PA |
348 | add_target (const target_info &t, target_open_ftype *func, |
349 | completer_ftype *completer) | |
c22a2b88 TT |
350 | { |
351 | struct cmd_list_element *c; | |
352 | ||
d9f719f1 PA |
353 | auto &func_slot = target_factories[&t]; |
354 | if (func_slot != nullptr) | |
355 | internal_error (__FILE__, __LINE__, | |
356 | _("target already added (\"%s\")."), t.shortname); | |
357 | func_slot = func; | |
c906108c SS |
358 | |
359 | if (targetlist == NULL) | |
1bedd215 AC |
360 | add_prefix_cmd ("target", class_run, target_command, _("\ |
361 | Connect to a target machine or process.\n\ | |
c906108c SS |
362 | The first argument is the type or protocol of the target machine.\n\ |
363 | Remaining arguments are interpreted by the target protocol. For more\n\ | |
364 | information on the arguments for a particular protocol, type\n\ | |
1bedd215 | 365 | `help target ' followed by the protocol name."), |
c906108c | 366 | &targetlist, "target ", 0, &cmdlist); |
d9f719f1 PA |
367 | c = add_cmd (t.shortname, no_class, t.doc, &targetlist); |
368 | set_cmd_context (c, (void *) &t); | |
8981c758 | 369 | set_cmd_sfunc (c, open_target); |
9852c492 YQ |
370 | if (completer != NULL) |
371 | set_cmd_completer (c, completer); | |
372 | } | |
373 | ||
b48d48eb MM |
374 | /* See target.h. */ |
375 | ||
376 | void | |
d9f719f1 | 377 | add_deprecated_target_alias (const target_info &tinfo, const char *alias) |
b48d48eb MM |
378 | { |
379 | struct cmd_list_element *c; | |
380 | char *alt; | |
381 | ||
382 | /* If we use add_alias_cmd, here, we do not get the deprecated warning, | |
383 | see PR cli/15104. */ | |
d9f719f1 | 384 | c = add_cmd (alias, no_class, tinfo.doc, &targetlist); |
8981c758 | 385 | set_cmd_sfunc (c, open_target); |
d9f719f1 PA |
386 | set_cmd_context (c, (void *) &tinfo); |
387 | alt = xstrprintf ("target %s", tinfo.shortname); | |
b48d48eb MM |
388 | deprecate_cmd (c, alt); |
389 | } | |
390 | ||
c906108c SS |
391 | /* Stub functions */ |
392 | ||
7d85a9c0 JB |
393 | void |
394 | target_kill (void) | |
395 | { | |
8b88a78e | 396 | current_top_target ()->kill (); |
7d85a9c0 JB |
397 | } |
398 | ||
11cf8741 | 399 | void |
9cbe5fff | 400 | target_load (const char *arg, int from_tty) |
11cf8741 | 401 | { |
4e5d721f | 402 | target_dcache_invalidate (); |
8b88a78e | 403 | current_top_target ()->load (arg, from_tty); |
11cf8741 JM |
404 | } |
405 | ||
223ffa71 | 406 | /* Define it. */ |
5842f62a | 407 | |
e671cd59 PA |
408 | target_terminal_state target_terminal::m_terminal_state |
409 | = target_terminal_state::is_ours; | |
5842f62a | 410 | |
223ffa71 | 411 | /* See target/target.h. */ |
5842f62a PA |
412 | |
413 | void | |
223ffa71 | 414 | target_terminal::init (void) |
5842f62a | 415 | { |
8b88a78e | 416 | current_top_target ()->terminal_init (); |
5842f62a | 417 | |
e671cd59 | 418 | m_terminal_state = target_terminal_state::is_ours; |
5842f62a PA |
419 | } |
420 | ||
223ffa71 | 421 | /* See target/target.h. */ |
2f99e8fc | 422 | |
d9d2d8b6 | 423 | void |
223ffa71 | 424 | target_terminal::inferior (void) |
d9d2d8b6 | 425 | { |
41fd2b0f PA |
426 | struct ui *ui = current_ui; |
427 | ||
d9d2d8b6 | 428 | /* A background resume (``run&'') should leave GDB in control of the |
3b12939d PA |
429 | terminal. */ |
430 | if (ui->prompt_state != PROMPT_BLOCKED) | |
d9d2d8b6 PA |
431 | return; |
432 | ||
215d3118 PA |
433 | /* Since we always run the inferior in the main console (unless "set |
434 | inferior-tty" is in effect), when some UI other than the main one | |
223ffa71 TT |
435 | calls target_terminal::inferior, then we leave the main UI's |
436 | terminal settings as is. */ | |
215d3118 PA |
437 | if (ui != main_ui) |
438 | return; | |
439 | ||
d9d2d8b6 PA |
440 | /* If GDB is resuming the inferior in the foreground, install |
441 | inferior's terminal modes. */ | |
e671cd59 PA |
442 | |
443 | struct inferior *inf = current_inferior (); | |
444 | ||
445 | if (inf->terminal_state != target_terminal_state::is_inferior) | |
446 | { | |
8b88a78e | 447 | current_top_target ()->terminal_inferior (); |
e671cd59 PA |
448 | inf->terminal_state = target_terminal_state::is_inferior; |
449 | } | |
450 | ||
451 | m_terminal_state = target_terminal_state::is_inferior; | |
452 | ||
453 | /* If the user hit C-c before, pretend that it was hit right | |
454 | here. */ | |
455 | if (check_quit_flag ()) | |
456 | target_pass_ctrlc (); | |
457 | } | |
458 | ||
459 | /* See target/target.h. */ | |
460 | ||
461 | void | |
462 | target_terminal::restore_inferior (void) | |
463 | { | |
464 | struct ui *ui = current_ui; | |
465 | ||
466 | /* See target_terminal::inferior(). */ | |
467 | if (ui->prompt_state != PROMPT_BLOCKED || ui != main_ui) | |
468 | return; | |
469 | ||
470 | /* Restore the terminal settings of inferiors that were in the | |
471 | foreground but are now ours_for_output due to a temporary | |
472 | target_target::ours_for_output() call. */ | |
473 | ||
474 | { | |
475 | scoped_restore_current_inferior restore_inferior; | |
476 | struct inferior *inf; | |
477 | ||
478 | ALL_INFERIORS (inf) | |
479 | { | |
480 | if (inf->terminal_state == target_terminal_state::is_ours_for_output) | |
481 | { | |
482 | set_current_inferior (inf); | |
8b88a78e | 483 | current_top_target ()->terminal_inferior (); |
e671cd59 PA |
484 | inf->terminal_state = target_terminal_state::is_inferior; |
485 | } | |
486 | } | |
487 | } | |
488 | ||
489 | m_terminal_state = target_terminal_state::is_inferior; | |
93692b58 PA |
490 | |
491 | /* If the user hit C-c before, pretend that it was hit right | |
492 | here. */ | |
493 | if (check_quit_flag ()) | |
494 | target_pass_ctrlc (); | |
5842f62a PA |
495 | } |
496 | ||
e671cd59 PA |
497 | /* Switch terminal state to DESIRED_STATE, either is_ours, or |
498 | is_ours_for_output. */ | |
499 | ||
500 | static void | |
501 | target_terminal_is_ours_kind (target_terminal_state desired_state) | |
502 | { | |
503 | scoped_restore_current_inferior restore_inferior; | |
504 | struct inferior *inf; | |
505 | ||
506 | /* Must do this in two passes. First, have all inferiors save the | |
507 | current terminal settings. Then, after all inferiors have add a | |
508 | chance to safely save the terminal settings, restore GDB's | |
509 | terminal settings. */ | |
510 | ||
511 | ALL_INFERIORS (inf) | |
512 | { | |
513 | if (inf->terminal_state == target_terminal_state::is_inferior) | |
514 | { | |
515 | set_current_inferior (inf); | |
8b88a78e | 516 | current_top_target ()->terminal_save_inferior (); |
e671cd59 PA |
517 | } |
518 | } | |
519 | ||
520 | ALL_INFERIORS (inf) | |
521 | { | |
522 | /* Note we don't check is_inferior here like above because we | |
523 | need to handle 'is_ours_for_output -> is_ours' too. Careful | |
524 | to never transition from 'is_ours' to 'is_ours_for_output', | |
525 | though. */ | |
526 | if (inf->terminal_state != target_terminal_state::is_ours | |
527 | && inf->terminal_state != desired_state) | |
528 | { | |
529 | set_current_inferior (inf); | |
530 | if (desired_state == target_terminal_state::is_ours) | |
8b88a78e | 531 | current_top_target ()->terminal_ours (); |
e671cd59 | 532 | else if (desired_state == target_terminal_state::is_ours_for_output) |
8b88a78e | 533 | current_top_target ()->terminal_ours_for_output (); |
e671cd59 PA |
534 | else |
535 | gdb_assert_not_reached ("unhandled desired state"); | |
536 | inf->terminal_state = desired_state; | |
537 | } | |
538 | } | |
539 | } | |
540 | ||
223ffa71 | 541 | /* See target/target.h. */ |
5842f62a PA |
542 | |
543 | void | |
223ffa71 | 544 | target_terminal::ours () |
5842f62a | 545 | { |
41fd2b0f PA |
546 | struct ui *ui = current_ui; |
547 | ||
223ffa71 | 548 | /* See target_terminal::inferior. */ |
215d3118 PA |
549 | if (ui != main_ui) |
550 | return; | |
551 | ||
e671cd59 | 552 | if (m_terminal_state == target_terminal_state::is_ours) |
5842f62a PA |
553 | return; |
554 | ||
e671cd59 PA |
555 | target_terminal_is_ours_kind (target_terminal_state::is_ours); |
556 | m_terminal_state = target_terminal_state::is_ours; | |
5842f62a PA |
557 | } |
558 | ||
223ffa71 | 559 | /* See target/target.h. */ |
5842f62a PA |
560 | |
561 | void | |
223ffa71 | 562 | target_terminal::ours_for_output () |
5842f62a | 563 | { |
215d3118 PA |
564 | struct ui *ui = current_ui; |
565 | ||
223ffa71 | 566 | /* See target_terminal::inferior. */ |
215d3118 PA |
567 | if (ui != main_ui) |
568 | return; | |
569 | ||
e671cd59 | 570 | if (!target_terminal::is_inferior ()) |
5842f62a | 571 | return; |
e671cd59 PA |
572 | |
573 | target_terminal_is_ours_kind (target_terminal_state::is_ours_for_output); | |
574 | target_terminal::m_terminal_state = target_terminal_state::is_ours_for_output; | |
d9d2d8b6 | 575 | } |
136d6dae | 576 | |
223ffa71 TT |
577 | /* See target/target.h. */ |
578 | ||
579 | void | |
580 | target_terminal::info (const char *arg, int from_tty) | |
581 | { | |
8b88a78e | 582 | current_top_target ()->terminal_info (arg, from_tty); |
223ffa71 TT |
583 | } |
584 | ||
b0ed115f TT |
585 | /* See target.h. */ |
586 | ||
587 | int | |
588 | target_supports_terminal_ours (void) | |
589 | { | |
8b88a78e | 590 | return current_top_target ()->supports_terminal_ours (); |
b0ed115f TT |
591 | } |
592 | ||
c906108c | 593 | static void |
fba45db2 | 594 | tcomplain (void) |
c906108c | 595 | { |
8a3fe4f8 | 596 | error (_("You can't do that when your target is `%s'"), |
8b88a78e | 597 | current_top_target ()->shortname ()); |
c906108c SS |
598 | } |
599 | ||
600 | void | |
fba45db2 | 601 | noprocess (void) |
c906108c | 602 | { |
8a3fe4f8 | 603 | error (_("You can't do that without a process to debug.")); |
c906108c SS |
604 | } |
605 | ||
c906108c | 606 | static void |
0a4f40a2 | 607 | default_terminal_info (struct target_ops *self, const char *args, int from_tty) |
c906108c | 608 | { |
a3f17187 | 609 | printf_unfiltered (_("No saved terminal information.\n")); |
c906108c SS |
610 | } |
611 | ||
0ef643c8 JB |
612 | /* A default implementation for the to_get_ada_task_ptid target method. |
613 | ||
614 | This function builds the PTID by using both LWP and TID as part of | |
615 | the PTID lwp and tid elements. The pid used is the pid of the | |
616 | inferior_ptid. */ | |
617 | ||
2c0b251b | 618 | static ptid_t |
1e6b91a4 | 619 | default_get_ada_task_ptid (struct target_ops *self, long lwp, long tid) |
0ef643c8 | 620 | { |
e99b03dc | 621 | return ptid_t (inferior_ptid.pid (), lwp, tid); |
0ef643c8 JB |
622 | } |
623 | ||
32231432 | 624 | static enum exec_direction_kind |
4c612759 | 625 | default_execution_direction (struct target_ops *self) |
32231432 PA |
626 | { |
627 | if (!target_can_execute_reverse) | |
628 | return EXEC_FORWARD; | |
629 | else if (!target_can_async_p ()) | |
630 | return EXEC_FORWARD; | |
631 | else | |
632 | gdb_assert_not_reached ("\ | |
633 | to_execution_direction must be implemented for reverse async"); | |
634 | } | |
635 | ||
a1740ee1 | 636 | /* See target.h. */ |
c906108c | 637 | |
b26a4dcb | 638 | void |
a1740ee1 | 639 | target_stack::push (target_ops *t) |
c906108c | 640 | { |
a1740ee1 PA |
641 | /* If there's already a target at this stratum, remove it. */ |
642 | if (m_stack[t->to_stratum] != NULL) | |
c906108c | 643 | { |
a1740ee1 PA |
644 | target_ops *prev = m_stack[t->to_stratum]; |
645 | m_stack[t->to_stratum] = NULL; | |
646 | target_close (prev); | |
c906108c SS |
647 | } |
648 | ||
a1740ee1 PA |
649 | /* Now add the new one. */ |
650 | m_stack[t->to_stratum] = t; | |
5d502164 | 651 | |
a1740ee1 PA |
652 | if (m_top < t->to_stratum) |
653 | m_top = t->to_stratum; | |
654 | } | |
655 | ||
656 | /* See target.h. */ | |
c906108c | 657 | |
a1740ee1 PA |
658 | void |
659 | push_target (struct target_ops *t) | |
660 | { | |
661 | g_target_stack.push (t); | |
c906108c SS |
662 | } |
663 | ||
a1740ee1 | 664 | /* See target.h. */ |
c906108c SS |
665 | |
666 | int | |
fba45db2 | 667 | unpush_target (struct target_ops *t) |
a1740ee1 PA |
668 | { |
669 | return g_target_stack.unpush (t); | |
670 | } | |
671 | ||
672 | /* See target.h. */ | |
673 | ||
674 | bool | |
675 | target_stack::unpush (target_ops *t) | |
c906108c | 676 | { |
c8d104ad PA |
677 | if (t->to_stratum == dummy_stratum) |
678 | internal_error (__FILE__, __LINE__, | |
9b20d036 | 679 | _("Attempt to unpush the dummy target")); |
c8d104ad | 680 | |
a1740ee1 PA |
681 | gdb_assert (t != NULL); |
682 | ||
683 | /* Look for the specified target. Note that a target can only occur | |
684 | once in the target stack. */ | |
c906108c | 685 | |
a1740ee1 | 686 | if (m_stack[t->to_stratum] != t) |
258b763a | 687 | { |
a1740ee1 PA |
688 | /* If T wasn't pushed, quit. Only open targets should be |
689 | closed. */ | |
690 | return false; | |
258b763a | 691 | } |
c906108c | 692 | |
c378eb4e | 693 | /* Unchain the target. */ |
a1740ee1 PA |
694 | m_stack[t->to_stratum] = NULL; |
695 | ||
696 | if (m_top == t->to_stratum) | |
697 | m_top = t->beneath ()->to_stratum; | |
c906108c | 698 | |
305436e0 PA |
699 | /* Finally close the target. Note we do this after unchaining, so |
700 | any target method calls from within the target_close | |
701 | implementation don't end up in T anymore. */ | |
460014f5 | 702 | target_close (t); |
305436e0 | 703 | |
a1740ee1 | 704 | return true; |
c906108c SS |
705 | } |
706 | ||
915ef8b1 PA |
707 | /* Unpush TARGET and assert that it worked. */ |
708 | ||
709 | static void | |
710 | unpush_target_and_assert (struct target_ops *target) | |
711 | { | |
712 | if (!unpush_target (target)) | |
713 | { | |
714 | fprintf_unfiltered (gdb_stderr, | |
715 | "pop_all_targets couldn't find target %s\n", | |
f6ac5f3d | 716 | target->shortname ()); |
915ef8b1 PA |
717 | internal_error (__FILE__, __LINE__, |
718 | _("failed internal consistency check")); | |
719 | } | |
720 | } | |
721 | ||
aa76d38d | 722 | void |
460014f5 | 723 | pop_all_targets_above (enum strata above_stratum) |
aa76d38d | 724 | { |
8b88a78e PA |
725 | while ((int) (current_top_target ()->to_stratum) > (int) above_stratum) |
726 | unpush_target_and_assert (current_top_target ()); | |
915ef8b1 PA |
727 | } |
728 | ||
729 | /* See target.h. */ | |
730 | ||
731 | void | |
732 | pop_all_targets_at_and_above (enum strata stratum) | |
733 | { | |
8b88a78e PA |
734 | while ((int) (current_top_target ()->to_stratum) >= (int) stratum) |
735 | unpush_target_and_assert (current_top_target ()); | |
aa76d38d PA |
736 | } |
737 | ||
87ab71f0 | 738 | void |
460014f5 | 739 | pop_all_targets (void) |
87ab71f0 | 740 | { |
460014f5 | 741 | pop_all_targets_above (dummy_stratum); |
87ab71f0 PA |
742 | } |
743 | ||
c0edd9ed JK |
744 | /* Return 1 if T is now pushed in the target stack. Return 0 otherwise. */ |
745 | ||
746 | int | |
747 | target_is_pushed (struct target_ops *t) | |
748 | { | |
a1740ee1 | 749 | return g_target_stack.is_pushed (t); |
c0edd9ed JK |
750 | } |
751 | ||
f0f9ff95 TT |
752 | /* Default implementation of to_get_thread_local_address. */ |
753 | ||
754 | static void | |
755 | generic_tls_error (void) | |
756 | { | |
757 | throw_error (TLS_GENERIC_ERROR, | |
758 | _("Cannot find thread-local variables on this target")); | |
759 | } | |
760 | ||
72f5cf0e | 761 | /* Using the objfile specified in OBJFILE, find the address for the |
9e35dae4 DJ |
762 | current thread's thread-local storage with offset OFFSET. */ |
763 | CORE_ADDR | |
764 | target_translate_tls_address (struct objfile *objfile, CORE_ADDR offset) | |
765 | { | |
766 | volatile CORE_ADDR addr = 0; | |
8b88a78e | 767 | struct target_ops *target = current_top_target (); |
9e35dae4 | 768 | |
f0f9ff95 | 769 | if (gdbarch_fetch_tls_load_module_address_p (target_gdbarch ())) |
9e35dae4 DJ |
770 | { |
771 | ptid_t ptid = inferior_ptid; | |
9e35dae4 | 772 | |
492d29ea | 773 | TRY |
9e35dae4 DJ |
774 | { |
775 | CORE_ADDR lm_addr; | |
776 | ||
777 | /* Fetch the load module address for this objfile. */ | |
f5656ead | 778 | lm_addr = gdbarch_fetch_tls_load_module_address (target_gdbarch (), |
9e35dae4 | 779 | objfile); |
9e35dae4 | 780 | |
f6ac5f3d | 781 | addr = target->get_thread_local_address (ptid, lm_addr, offset); |
9e35dae4 DJ |
782 | } |
783 | /* If an error occurred, print TLS related messages here. Otherwise, | |
784 | throw the error to some higher catcher. */ | |
492d29ea | 785 | CATCH (ex, RETURN_MASK_ALL) |
9e35dae4 DJ |
786 | { |
787 | int objfile_is_library = (objfile->flags & OBJF_SHARED); | |
788 | ||
789 | switch (ex.error) | |
790 | { | |
791 | case TLS_NO_LIBRARY_SUPPORT_ERROR: | |
3e43a32a MS |
792 | error (_("Cannot find thread-local variables " |
793 | "in this thread library.")); | |
9e35dae4 DJ |
794 | break; |
795 | case TLS_LOAD_MODULE_NOT_FOUND_ERROR: | |
796 | if (objfile_is_library) | |
797 | error (_("Cannot find shared library `%s' in dynamic" | |
4262abfb | 798 | " linker's load module list"), objfile_name (objfile)); |
9e35dae4 DJ |
799 | else |
800 | error (_("Cannot find executable file `%s' in dynamic" | |
4262abfb | 801 | " linker's load module list"), objfile_name (objfile)); |
9e35dae4 DJ |
802 | break; |
803 | case TLS_NOT_ALLOCATED_YET_ERROR: | |
804 | if (objfile_is_library) | |
805 | error (_("The inferior has not yet allocated storage for" | |
806 | " thread-local variables in\n" | |
807 | "the shared library `%s'\n" | |
808 | "for %s"), | |
4262abfb | 809 | objfile_name (objfile), target_pid_to_str (ptid)); |
9e35dae4 DJ |
810 | else |
811 | error (_("The inferior has not yet allocated storage for" | |
812 | " thread-local variables in\n" | |
813 | "the executable `%s'\n" | |
814 | "for %s"), | |
4262abfb | 815 | objfile_name (objfile), target_pid_to_str (ptid)); |
9e35dae4 DJ |
816 | break; |
817 | case TLS_GENERIC_ERROR: | |
818 | if (objfile_is_library) | |
819 | error (_("Cannot find thread-local storage for %s, " | |
820 | "shared library %s:\n%s"), | |
821 | target_pid_to_str (ptid), | |
4262abfb | 822 | objfile_name (objfile), ex.message); |
9e35dae4 DJ |
823 | else |
824 | error (_("Cannot find thread-local storage for %s, " | |
825 | "executable file %s:\n%s"), | |
826 | target_pid_to_str (ptid), | |
4262abfb | 827 | objfile_name (objfile), ex.message); |
9e35dae4 DJ |
828 | break; |
829 | default: | |
830 | throw_exception (ex); | |
831 | break; | |
832 | } | |
833 | } | |
492d29ea | 834 | END_CATCH |
9e35dae4 DJ |
835 | } |
836 | /* It wouldn't be wrong here to try a gdbarch method, too; finding | |
837 | TLS is an ABI-specific thing. But we don't do that yet. */ | |
838 | else | |
839 | error (_("Cannot find thread-local variables on this target")); | |
840 | ||
841 | return addr; | |
842 | } | |
843 | ||
6be7b56e | 844 | const char * |
01cb8804 | 845 | target_xfer_status_to_string (enum target_xfer_status status) |
6be7b56e PA |
846 | { |
847 | #define CASE(X) case X: return #X | |
01cb8804 | 848 | switch (status) |
6be7b56e PA |
849 | { |
850 | CASE(TARGET_XFER_E_IO); | |
bc113b4e | 851 | CASE(TARGET_XFER_UNAVAILABLE); |
6be7b56e PA |
852 | default: |
853 | return "<unknown>"; | |
854 | } | |
855 | #undef CASE | |
856 | }; | |
857 | ||
858 | ||
c906108c SS |
859 | #undef MIN |
860 | #define MIN(A, B) (((A) <= (B)) ? (A) : (B)) | |
861 | ||
862 | /* target_read_string -- read a null terminated string, up to LEN bytes, | |
863 | from MEMADDR in target. Set *ERRNOP to the errno code, or 0 if successful. | |
864 | Set *STRING to a pointer to malloc'd memory containing the data; the caller | |
865 | is responsible for freeing it. Return the number of bytes successfully | |
866 | read. */ | |
867 | ||
868 | int | |
e83e4e24 TT |
869 | target_read_string (CORE_ADDR memaddr, gdb::unique_xmalloc_ptr<char> *string, |
870 | int len, int *errnop) | |
c906108c | 871 | { |
c2e8b827 | 872 | int tlen, offset, i; |
1b0ba102 | 873 | gdb_byte buf[4]; |
c906108c SS |
874 | int errcode = 0; |
875 | char *buffer; | |
876 | int buffer_allocated; | |
877 | char *bufptr; | |
878 | unsigned int nbytes_read = 0; | |
879 | ||
6217bf3e MS |
880 | gdb_assert (string); |
881 | ||
c906108c SS |
882 | /* Small for testing. */ |
883 | buffer_allocated = 4; | |
224c3ddb | 884 | buffer = (char *) xmalloc (buffer_allocated); |
c906108c SS |
885 | bufptr = buffer; |
886 | ||
c906108c SS |
887 | while (len > 0) |
888 | { | |
889 | tlen = MIN (len, 4 - (memaddr & 3)); | |
890 | offset = memaddr & 3; | |
891 | ||
1b0ba102 | 892 | errcode = target_read_memory (memaddr & ~3, buf, sizeof buf); |
c906108c SS |
893 | if (errcode != 0) |
894 | { | |
895 | /* The transfer request might have crossed the boundary to an | |
c378eb4e | 896 | unallocated region of memory. Retry the transfer, requesting |
c906108c SS |
897 | a single byte. */ |
898 | tlen = 1; | |
899 | offset = 0; | |
b8eb5af0 | 900 | errcode = target_read_memory (memaddr, buf, 1); |
c906108c SS |
901 | if (errcode != 0) |
902 | goto done; | |
903 | } | |
904 | ||
905 | if (bufptr - buffer + tlen > buffer_allocated) | |
906 | { | |
907 | unsigned int bytes; | |
5d502164 | 908 | |
c906108c SS |
909 | bytes = bufptr - buffer; |
910 | buffer_allocated *= 2; | |
224c3ddb | 911 | buffer = (char *) xrealloc (buffer, buffer_allocated); |
c906108c SS |
912 | bufptr = buffer + bytes; |
913 | } | |
914 | ||
915 | for (i = 0; i < tlen; i++) | |
916 | { | |
917 | *bufptr++ = buf[i + offset]; | |
918 | if (buf[i + offset] == '\000') | |
919 | { | |
920 | nbytes_read += i + 1; | |
921 | goto done; | |
922 | } | |
923 | } | |
924 | ||
925 | memaddr += tlen; | |
926 | len -= tlen; | |
927 | nbytes_read += tlen; | |
928 | } | |
c5aa993b | 929 | done: |
e83e4e24 | 930 | string->reset (buffer); |
c906108c SS |
931 | if (errnop != NULL) |
932 | *errnop = errcode; | |
c906108c SS |
933 | return nbytes_read; |
934 | } | |
935 | ||
07b82ea5 PA |
936 | struct target_section_table * |
937 | target_get_section_table (struct target_ops *target) | |
938 | { | |
f6ac5f3d | 939 | return target->get_section_table (); |
07b82ea5 PA |
940 | } |
941 | ||
8db32d44 | 942 | /* Find a section containing ADDR. */ |
07b82ea5 | 943 | |
0542c86d | 944 | struct target_section * |
8db32d44 AC |
945 | target_section_by_addr (struct target_ops *target, CORE_ADDR addr) |
946 | { | |
07b82ea5 | 947 | struct target_section_table *table = target_get_section_table (target); |
0542c86d | 948 | struct target_section *secp; |
07b82ea5 PA |
949 | |
950 | if (table == NULL) | |
951 | return NULL; | |
952 | ||
953 | for (secp = table->sections; secp < table->sections_end; secp++) | |
8db32d44 AC |
954 | { |
955 | if (addr >= secp->addr && addr < secp->endaddr) | |
956 | return secp; | |
957 | } | |
958 | return NULL; | |
959 | } | |
960 | ||
0fec99e8 PA |
961 | |
962 | /* Helper for the memory xfer routines. Checks the attributes of the | |
963 | memory region of MEMADDR against the read or write being attempted. | |
964 | If the access is permitted returns true, otherwise returns false. | |
965 | REGION_P is an optional output parameter. If not-NULL, it is | |
966 | filled with a pointer to the memory region of MEMADDR. REG_LEN | |
967 | returns LEN trimmed to the end of the region. This is how much the | |
968 | caller can continue requesting, if the access is permitted. A | |
969 | single xfer request must not straddle memory region boundaries. */ | |
970 | ||
971 | static int | |
972 | memory_xfer_check_region (gdb_byte *readbuf, const gdb_byte *writebuf, | |
973 | ULONGEST memaddr, ULONGEST len, ULONGEST *reg_len, | |
974 | struct mem_region **region_p) | |
975 | { | |
976 | struct mem_region *region; | |
977 | ||
978 | region = lookup_mem_region (memaddr); | |
979 | ||
980 | if (region_p != NULL) | |
981 | *region_p = region; | |
982 | ||
983 | switch (region->attrib.mode) | |
984 | { | |
985 | case MEM_RO: | |
986 | if (writebuf != NULL) | |
987 | return 0; | |
988 | break; | |
989 | ||
990 | case MEM_WO: | |
991 | if (readbuf != NULL) | |
992 | return 0; | |
993 | break; | |
994 | ||
995 | case MEM_FLASH: | |
996 | /* We only support writing to flash during "load" for now. */ | |
997 | if (writebuf != NULL) | |
998 | error (_("Writing to flash memory forbidden in this context")); | |
999 | break; | |
1000 | ||
1001 | case MEM_NONE: | |
1002 | return 0; | |
1003 | } | |
1004 | ||
1005 | /* region->hi == 0 means there's no upper bound. */ | |
1006 | if (memaddr + len < region->hi || region->hi == 0) | |
1007 | *reg_len = len; | |
1008 | else | |
1009 | *reg_len = region->hi - memaddr; | |
1010 | ||
1011 | return 1; | |
1012 | } | |
1013 | ||
9f713294 YQ |
1014 | /* Read memory from more than one valid target. A core file, for |
1015 | instance, could have some of memory but delegate other bits to | |
1016 | the target below it. So, we must manually try all targets. */ | |
1017 | ||
cc9f16aa | 1018 | enum target_xfer_status |
17fde6d0 | 1019 | raw_memory_xfer_partial (struct target_ops *ops, gdb_byte *readbuf, |
9b409511 YQ |
1020 | const gdb_byte *writebuf, ULONGEST memaddr, LONGEST len, |
1021 | ULONGEST *xfered_len) | |
9f713294 | 1022 | { |
9b409511 | 1023 | enum target_xfer_status res; |
9f713294 YQ |
1024 | |
1025 | do | |
1026 | { | |
f6ac5f3d PA |
1027 | res = ops->xfer_partial (TARGET_OBJECT_MEMORY, NULL, |
1028 | readbuf, writebuf, memaddr, len, | |
1029 | xfered_len); | |
9b409511 | 1030 | if (res == TARGET_XFER_OK) |
9f713294 YQ |
1031 | break; |
1032 | ||
633785ff | 1033 | /* Stop if the target reports that the memory is not available. */ |
bc113b4e | 1034 | if (res == TARGET_XFER_UNAVAILABLE) |
633785ff MM |
1035 | break; |
1036 | ||
9f713294 YQ |
1037 | /* We want to continue past core files to executables, but not |
1038 | past a running target's memory. */ | |
f6ac5f3d | 1039 | if (ops->has_all_memory ()) |
9f713294 YQ |
1040 | break; |
1041 | ||
b6a8c27b | 1042 | ops = ops->beneath (); |
9f713294 YQ |
1043 | } |
1044 | while (ops != NULL); | |
1045 | ||
0f26cec1 PA |
1046 | /* The cache works at the raw memory level. Make sure the cache |
1047 | gets updated with raw contents no matter what kind of memory | |
1048 | object was originally being written. Note we do write-through | |
1049 | first, so that if it fails, we don't write to the cache contents | |
1050 | that never made it to the target. */ | |
1051 | if (writebuf != NULL | |
d7e15655 | 1052 | && inferior_ptid != null_ptid |
0f26cec1 PA |
1053 | && target_dcache_init_p () |
1054 | && (stack_cache_enabled_p () || code_cache_enabled_p ())) | |
1055 | { | |
1056 | DCACHE *dcache = target_dcache_get (); | |
1057 | ||
1058 | /* Note that writing to an area of memory which wasn't present | |
1059 | in the cache doesn't cause it to be loaded in. */ | |
1060 | dcache_update (dcache, res, memaddr, writebuf, *xfered_len); | |
1061 | } | |
1062 | ||
9f713294 YQ |
1063 | return res; |
1064 | } | |
1065 | ||
7f79c47e DE |
1066 | /* Perform a partial memory transfer. |
1067 | For docs see target.h, to_xfer_partial. */ | |
cf7a04e8 | 1068 | |
9b409511 | 1069 | static enum target_xfer_status |
f0ba3972 | 1070 | memory_xfer_partial_1 (struct target_ops *ops, enum target_object object, |
17fde6d0 | 1071 | gdb_byte *readbuf, const gdb_byte *writebuf, ULONGEST memaddr, |
9b409511 | 1072 | ULONGEST len, ULONGEST *xfered_len) |
0779438d | 1073 | { |
9b409511 | 1074 | enum target_xfer_status res; |
0fec99e8 | 1075 | ULONGEST reg_len; |
cf7a04e8 | 1076 | struct mem_region *region; |
4e5d721f | 1077 | struct inferior *inf; |
cf7a04e8 | 1078 | |
07b82ea5 PA |
1079 | /* For accesses to unmapped overlay sections, read directly from |
1080 | files. Must do this first, as MEMADDR may need adjustment. */ | |
1081 | if (readbuf != NULL && overlay_debugging) | |
1082 | { | |
1083 | struct obj_section *section = find_pc_overlay (memaddr); | |
5d502164 | 1084 | |
07b82ea5 PA |
1085 | if (pc_in_unmapped_range (memaddr, section)) |
1086 | { | |
1087 | struct target_section_table *table | |
1088 | = target_get_section_table (ops); | |
1089 | const char *section_name = section->the_bfd_section->name; | |
5d502164 | 1090 | |
07b82ea5 PA |
1091 | memaddr = overlay_mapped_address (memaddr, section); |
1092 | return section_table_xfer_memory_partial (readbuf, writebuf, | |
9b409511 | 1093 | memaddr, len, xfered_len, |
07b82ea5 PA |
1094 | table->sections, |
1095 | table->sections_end, | |
1096 | section_name); | |
1097 | } | |
1098 | } | |
1099 | ||
1100 | /* Try the executable files, if "trust-readonly-sections" is set. */ | |
cf7a04e8 DJ |
1101 | if (readbuf != NULL && trust_readonly) |
1102 | { | |
0542c86d | 1103 | struct target_section *secp; |
07b82ea5 | 1104 | struct target_section_table *table; |
cf7a04e8 DJ |
1105 | |
1106 | secp = target_section_by_addr (ops, memaddr); | |
1107 | if (secp != NULL | |
2b2848e2 DE |
1108 | && (bfd_get_section_flags (secp->the_bfd_section->owner, |
1109 | secp->the_bfd_section) | |
cf7a04e8 | 1110 | & SEC_READONLY)) |
07b82ea5 PA |
1111 | { |
1112 | table = target_get_section_table (ops); | |
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 | NULL); | |
1118 | } | |
98646950 UW |
1119 | } |
1120 | ||
cf7a04e8 | 1121 | /* Try GDB's internal data cache. */ |
cf7a04e8 | 1122 | |
0fec99e8 PA |
1123 | if (!memory_xfer_check_region (readbuf, writebuf, memaddr, len, ®_len, |
1124 | ®ion)) | |
1125 | return TARGET_XFER_E_IO; | |
cf7a04e8 | 1126 | |
d7e15655 | 1127 | if (inferior_ptid != null_ptid) |
00431a78 | 1128 | inf = current_inferior (); |
6c95b8df PA |
1129 | else |
1130 | inf = NULL; | |
4e5d721f DE |
1131 | |
1132 | if (inf != NULL | |
0f26cec1 | 1133 | && readbuf != NULL |
2f4d8875 PA |
1134 | /* The dcache reads whole cache lines; that doesn't play well |
1135 | with reading from a trace buffer, because reading outside of | |
1136 | the collected memory range fails. */ | |
1137 | && get_traceframe_number () == -1 | |
4e5d721f | 1138 | && (region->attrib.cache |
29453a14 YQ |
1139 | || (stack_cache_enabled_p () && object == TARGET_OBJECT_STACK_MEMORY) |
1140 | || (code_cache_enabled_p () && object == TARGET_OBJECT_CODE_MEMORY))) | |
cf7a04e8 | 1141 | { |
2a2f9fe4 YQ |
1142 | DCACHE *dcache = target_dcache_get_or_init (); |
1143 | ||
0f26cec1 PA |
1144 | return dcache_read_memory_partial (ops, dcache, memaddr, readbuf, |
1145 | reg_len, xfered_len); | |
cf7a04e8 DJ |
1146 | } |
1147 | ||
1148 | /* If none of those methods found the memory we wanted, fall back | |
1149 | to a target partial transfer. Normally a single call to | |
1150 | to_xfer_partial is enough; if it doesn't recognize an object | |
1151 | it will call the to_xfer_partial of the next target down. | |
1152 | But for memory this won't do. Memory is the only target | |
9b409511 YQ |
1153 | object which can be read from more than one valid target. |
1154 | A core file, for instance, could have some of memory but | |
1155 | delegate other bits to the target below it. So, we must | |
1156 | manually try all targets. */ | |
1157 | ||
1158 | res = raw_memory_xfer_partial (ops, readbuf, writebuf, memaddr, reg_len, | |
1159 | xfered_len); | |
cf7a04e8 DJ |
1160 | |
1161 | /* If we still haven't got anything, return the last error. We | |
1162 | give up. */ | |
1163 | return res; | |
0779438d AC |
1164 | } |
1165 | ||
f0ba3972 PA |
1166 | /* Perform a partial memory transfer. For docs see target.h, |
1167 | to_xfer_partial. */ | |
1168 | ||
9b409511 | 1169 | static enum target_xfer_status |
f0ba3972 | 1170 | memory_xfer_partial (struct target_ops *ops, enum target_object object, |
9b409511 YQ |
1171 | gdb_byte *readbuf, const gdb_byte *writebuf, |
1172 | ULONGEST memaddr, ULONGEST len, ULONGEST *xfered_len) | |
f0ba3972 | 1173 | { |
9b409511 | 1174 | enum target_xfer_status res; |
f0ba3972 PA |
1175 | |
1176 | /* Zero length requests are ok and require no work. */ | |
1177 | if (len == 0) | |
9b409511 | 1178 | return TARGET_XFER_EOF; |
f0ba3972 | 1179 | |
a738ea1d YQ |
1180 | memaddr = address_significant (target_gdbarch (), memaddr); |
1181 | ||
f0ba3972 PA |
1182 | /* Fill in READBUF with breakpoint shadows, or WRITEBUF with |
1183 | breakpoint insns, thus hiding out from higher layers whether | |
1184 | there are software breakpoints inserted in the code stream. */ | |
1185 | if (readbuf != NULL) | |
1186 | { | |
9b409511 YQ |
1187 | res = memory_xfer_partial_1 (ops, object, readbuf, NULL, memaddr, len, |
1188 | xfered_len); | |
f0ba3972 | 1189 | |
9b409511 | 1190 | if (res == TARGET_XFER_OK && !show_memory_breakpoints) |
c63528fc | 1191 | breakpoint_xfer_memory (readbuf, NULL, NULL, memaddr, *xfered_len); |
f0ba3972 PA |
1192 | } |
1193 | else | |
1194 | { | |
67c059c2 AB |
1195 | /* A large write request is likely to be partially satisfied |
1196 | by memory_xfer_partial_1. We will continually malloc | |
1197 | and free a copy of the entire write request for breakpoint | |
1198 | shadow handling even though we only end up writing a small | |
09c98b44 DB |
1199 | subset of it. Cap writes to a limit specified by the target |
1200 | to mitigate this. */ | |
f6ac5f3d | 1201 | len = std::min (ops->get_memory_xfer_limit (), len); |
67c059c2 | 1202 | |
26fcd5d7 TT |
1203 | gdb::byte_vector buf (writebuf, writebuf + len); |
1204 | breakpoint_xfer_memory (NULL, buf.data (), writebuf, memaddr, len); | |
1205 | res = memory_xfer_partial_1 (ops, object, NULL, buf.data (), memaddr, len, | |
9b409511 | 1206 | xfered_len); |
f0ba3972 PA |
1207 | } |
1208 | ||
1209 | return res; | |
1210 | } | |
1211 | ||
cb85b21b TT |
1212 | scoped_restore_tmpl<int> |
1213 | make_scoped_restore_show_memory_breakpoints (int show) | |
8defab1a | 1214 | { |
cb85b21b | 1215 | return make_scoped_restore (&show_memory_breakpoints, show); |
8defab1a DJ |
1216 | } |
1217 | ||
7f79c47e DE |
1218 | /* For docs see target.h, to_xfer_partial. */ |
1219 | ||
9b409511 | 1220 | enum target_xfer_status |
27394598 AC |
1221 | target_xfer_partial (struct target_ops *ops, |
1222 | enum target_object object, const char *annex, | |
4ac248ca | 1223 | gdb_byte *readbuf, const gdb_byte *writebuf, |
9b409511 YQ |
1224 | ULONGEST offset, ULONGEST len, |
1225 | ULONGEST *xfered_len) | |
27394598 | 1226 | { |
9b409511 | 1227 | enum target_xfer_status retval; |
27394598 | 1228 | |
ce6d0892 YQ |
1229 | /* Transfer is done when LEN is zero. */ |
1230 | if (len == 0) | |
9b409511 | 1231 | return TARGET_XFER_EOF; |
ce6d0892 | 1232 | |
d914c394 SS |
1233 | if (writebuf && !may_write_memory) |
1234 | error (_("Writing to memory is not allowed (addr %s, len %s)"), | |
1235 | core_addr_to_string_nz (offset), plongest (len)); | |
1236 | ||
9b409511 YQ |
1237 | *xfered_len = 0; |
1238 | ||
cf7a04e8 DJ |
1239 | /* If this is a memory transfer, let the memory-specific code |
1240 | have a look at it instead. Memory transfers are more | |
1241 | complicated. */ | |
29453a14 YQ |
1242 | if (object == TARGET_OBJECT_MEMORY || object == TARGET_OBJECT_STACK_MEMORY |
1243 | || object == TARGET_OBJECT_CODE_MEMORY) | |
4e5d721f | 1244 | retval = memory_xfer_partial (ops, object, readbuf, |
9b409511 | 1245 | writebuf, offset, len, xfered_len); |
9f713294 | 1246 | else if (object == TARGET_OBJECT_RAW_MEMORY) |
cf7a04e8 | 1247 | { |
0fec99e8 PA |
1248 | /* Skip/avoid accessing the target if the memory region |
1249 | attributes block the access. Check this here instead of in | |
1250 | raw_memory_xfer_partial as otherwise we'd end up checking | |
1251 | this twice in the case of the memory_xfer_partial path is | |
1252 | taken; once before checking the dcache, and another in the | |
1253 | tail call to raw_memory_xfer_partial. */ | |
1254 | if (!memory_xfer_check_region (readbuf, writebuf, offset, len, &len, | |
1255 | NULL)) | |
1256 | return TARGET_XFER_E_IO; | |
1257 | ||
9f713294 | 1258 | /* Request the normal memory object from other layers. */ |
9b409511 YQ |
1259 | retval = raw_memory_xfer_partial (ops, readbuf, writebuf, offset, len, |
1260 | xfered_len); | |
cf7a04e8 | 1261 | } |
9f713294 | 1262 | else |
f6ac5f3d PA |
1263 | retval = ops->xfer_partial (object, annex, readbuf, |
1264 | writebuf, offset, len, xfered_len); | |
cf7a04e8 | 1265 | |
27394598 AC |
1266 | if (targetdebug) |
1267 | { | |
1268 | const unsigned char *myaddr = NULL; | |
1269 | ||
1270 | fprintf_unfiltered (gdb_stdlog, | |
3e43a32a | 1271 | "%s:target_xfer_partial " |
9b409511 | 1272 | "(%d, %s, %s, %s, %s, %s) = %d, %s", |
f6ac5f3d | 1273 | ops->shortname (), |
27394598 AC |
1274 | (int) object, |
1275 | (annex ? annex : "(null)"), | |
53b71562 JB |
1276 | host_address_to_string (readbuf), |
1277 | host_address_to_string (writebuf), | |
0b1553bc | 1278 | core_addr_to_string_nz (offset), |
9b409511 YQ |
1279 | pulongest (len), retval, |
1280 | pulongest (*xfered_len)); | |
27394598 AC |
1281 | |
1282 | if (readbuf) | |
1283 | myaddr = readbuf; | |
1284 | if (writebuf) | |
1285 | myaddr = writebuf; | |
9b409511 | 1286 | if (retval == TARGET_XFER_OK && myaddr != NULL) |
27394598 AC |
1287 | { |
1288 | int i; | |
2bc416ba | 1289 | |
27394598 | 1290 | fputs_unfiltered (", bytes =", gdb_stdlog); |
9b409511 | 1291 | for (i = 0; i < *xfered_len; i++) |
27394598 | 1292 | { |
53b71562 | 1293 | if ((((intptr_t) &(myaddr[i])) & 0xf) == 0) |
27394598 AC |
1294 | { |
1295 | if (targetdebug < 2 && i > 0) | |
1296 | { | |
1297 | fprintf_unfiltered (gdb_stdlog, " ..."); | |
1298 | break; | |
1299 | } | |
1300 | fprintf_unfiltered (gdb_stdlog, "\n"); | |
1301 | } | |
2bc416ba | 1302 | |
27394598 AC |
1303 | fprintf_unfiltered (gdb_stdlog, " %02x", myaddr[i] & 0xff); |
1304 | } | |
1305 | } | |
2bc416ba | 1306 | |
27394598 AC |
1307 | fputc_unfiltered ('\n', gdb_stdlog); |
1308 | } | |
9b409511 YQ |
1309 | |
1310 | /* Check implementations of to_xfer_partial update *XFERED_LEN | |
1311 | properly. Do assertion after printing debug messages, so that we | |
1312 | can find more clues on assertion failure from debugging messages. */ | |
bc113b4e | 1313 | if (retval == TARGET_XFER_OK || retval == TARGET_XFER_UNAVAILABLE) |
9b409511 YQ |
1314 | gdb_assert (*xfered_len > 0); |
1315 | ||
27394598 AC |
1316 | return retval; |
1317 | } | |
1318 | ||
578d3588 PA |
1319 | /* Read LEN bytes of target memory at address MEMADDR, placing the |
1320 | results in GDB's memory at MYADDR. Returns either 0 for success or | |
d09f2c3f | 1321 | -1 if any error occurs. |
c906108c SS |
1322 | |
1323 | If an error occurs, no guarantee is made about the contents of the data at | |
1324 | MYADDR. In particular, the caller should not depend upon partial reads | |
1325 | filling the buffer with good data. There is no way for the caller to know | |
1326 | how much good data might have been transfered anyway. Callers that can | |
cf7a04e8 | 1327 | deal with partial reads should call target_read (which will retry until |
c378eb4e | 1328 | it makes no progress, and then return how much was transferred). */ |
c906108c SS |
1329 | |
1330 | int | |
1b162304 | 1331 | target_read_memory (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len) |
c906108c | 1332 | { |
8b88a78e | 1333 | if (target_read (current_top_target (), TARGET_OBJECT_MEMORY, NULL, |
cf7a04e8 DJ |
1334 | myaddr, memaddr, len) == len) |
1335 | return 0; | |
0779438d | 1336 | else |
d09f2c3f | 1337 | return -1; |
c906108c SS |
1338 | } |
1339 | ||
721ec300 GB |
1340 | /* See target/target.h. */ |
1341 | ||
1342 | int | |
1343 | target_read_uint32 (CORE_ADDR memaddr, uint32_t *result) | |
1344 | { | |
1345 | gdb_byte buf[4]; | |
1346 | int r; | |
1347 | ||
1348 | r = target_read_memory (memaddr, buf, sizeof buf); | |
1349 | if (r != 0) | |
1350 | return r; | |
1351 | *result = extract_unsigned_integer (buf, sizeof buf, | |
1352 | gdbarch_byte_order (target_gdbarch ())); | |
1353 | return 0; | |
1354 | } | |
1355 | ||
aee4bf85 PA |
1356 | /* Like target_read_memory, but specify explicitly that this is a read |
1357 | from the target's raw memory. That is, this read bypasses the | |
1358 | dcache, breakpoint shadowing, etc. */ | |
1359 | ||
1360 | int | |
1361 | target_read_raw_memory (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len) | |
1362 | { | |
8b88a78e | 1363 | if (target_read (current_top_target (), TARGET_OBJECT_RAW_MEMORY, NULL, |
aee4bf85 PA |
1364 | myaddr, memaddr, len) == len) |
1365 | return 0; | |
1366 | else | |
d09f2c3f | 1367 | return -1; |
aee4bf85 PA |
1368 | } |
1369 | ||
4e5d721f DE |
1370 | /* Like target_read_memory, but specify explicitly that this is a read from |
1371 | the target's stack. This may trigger different cache behavior. */ | |
1372 | ||
1373 | int | |
45aa4659 | 1374 | target_read_stack (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len) |
4e5d721f | 1375 | { |
8b88a78e | 1376 | if (target_read (current_top_target (), TARGET_OBJECT_STACK_MEMORY, NULL, |
4e5d721f DE |
1377 | myaddr, memaddr, len) == len) |
1378 | return 0; | |
1379 | else | |
d09f2c3f | 1380 | return -1; |
4e5d721f DE |
1381 | } |
1382 | ||
29453a14 YQ |
1383 | /* Like target_read_memory, but specify explicitly that this is a read from |
1384 | the target's code. This may trigger different cache behavior. */ | |
1385 | ||
1386 | int | |
1387 | target_read_code (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len) | |
1388 | { | |
8b88a78e | 1389 | if (target_read (current_top_target (), TARGET_OBJECT_CODE_MEMORY, NULL, |
29453a14 YQ |
1390 | myaddr, memaddr, len) == len) |
1391 | return 0; | |
1392 | else | |
d09f2c3f | 1393 | return -1; |
29453a14 YQ |
1394 | } |
1395 | ||
7f79c47e | 1396 | /* Write LEN bytes from MYADDR to target memory at address MEMADDR. |
d09f2c3f PA |
1397 | Returns either 0 for success or -1 if any error occurs. If an |
1398 | error occurs, no guarantee is made about how much data got written. | |
1399 | Callers that can deal with partial writes should call | |
1400 | target_write. */ | |
7f79c47e | 1401 | |
c906108c | 1402 | int |
45aa4659 | 1403 | target_write_memory (CORE_ADDR memaddr, const gdb_byte *myaddr, ssize_t len) |
c906108c | 1404 | { |
8b88a78e | 1405 | if (target_write (current_top_target (), TARGET_OBJECT_MEMORY, NULL, |
cf7a04e8 DJ |
1406 | myaddr, memaddr, len) == len) |
1407 | return 0; | |
0779438d | 1408 | else |
d09f2c3f | 1409 | return -1; |
c906108c | 1410 | } |
c5aa993b | 1411 | |
f0ba3972 | 1412 | /* Write LEN bytes from MYADDR to target raw memory at address |
d09f2c3f PA |
1413 | MEMADDR. Returns either 0 for success or -1 if any error occurs. |
1414 | If an error occurs, no guarantee is made about how much data got | |
1415 | written. Callers that can deal with partial writes should call | |
1416 | target_write. */ | |
f0ba3972 PA |
1417 | |
1418 | int | |
45aa4659 | 1419 | target_write_raw_memory (CORE_ADDR memaddr, const gdb_byte *myaddr, ssize_t len) |
f0ba3972 | 1420 | { |
8b88a78e | 1421 | if (target_write (current_top_target (), TARGET_OBJECT_RAW_MEMORY, NULL, |
f0ba3972 PA |
1422 | myaddr, memaddr, len) == len) |
1423 | return 0; | |
1424 | else | |
d09f2c3f | 1425 | return -1; |
f0ba3972 PA |
1426 | } |
1427 | ||
fd79ecee DJ |
1428 | /* Fetch the target's memory map. */ |
1429 | ||
a664f67e | 1430 | std::vector<mem_region> |
fd79ecee DJ |
1431 | target_memory_map (void) |
1432 | { | |
8b88a78e | 1433 | std::vector<mem_region> result = current_top_target ()->memory_map (); |
a664f67e SM |
1434 | if (result.empty ()) |
1435 | return result; | |
fd79ecee | 1436 | |
a664f67e | 1437 | std::sort (result.begin (), result.end ()); |
fd79ecee DJ |
1438 | |
1439 | /* Check that regions do not overlap. Simultaneously assign | |
1440 | a numbering for the "mem" commands to use to refer to | |
1441 | each region. */ | |
a664f67e SM |
1442 | mem_region *last_one = NULL; |
1443 | for (size_t ix = 0; ix < result.size (); ix++) | |
fd79ecee | 1444 | { |
a664f67e | 1445 | mem_region *this_one = &result[ix]; |
fd79ecee DJ |
1446 | this_one->number = ix; |
1447 | ||
a664f67e | 1448 | if (last_one != NULL && last_one->hi > this_one->lo) |
fd79ecee DJ |
1449 | { |
1450 | warning (_("Overlapping regions in memory map: ignoring")); | |
a664f67e | 1451 | return std::vector<mem_region> (); |
fd79ecee | 1452 | } |
a664f67e | 1453 | |
fd79ecee DJ |
1454 | last_one = this_one; |
1455 | } | |
1456 | ||
1457 | return result; | |
1458 | } | |
1459 | ||
a76d924d DJ |
1460 | void |
1461 | target_flash_erase (ULONGEST address, LONGEST length) | |
1462 | { | |
8b88a78e | 1463 | current_top_target ()->flash_erase (address, length); |
a76d924d DJ |
1464 | } |
1465 | ||
1466 | void | |
1467 | target_flash_done (void) | |
1468 | { | |
8b88a78e | 1469 | current_top_target ()->flash_done (); |
a76d924d DJ |
1470 | } |
1471 | ||
920d2a44 AC |
1472 | static void |
1473 | show_trust_readonly (struct ui_file *file, int from_tty, | |
1474 | struct cmd_list_element *c, const char *value) | |
1475 | { | |
3e43a32a MS |
1476 | fprintf_filtered (file, |
1477 | _("Mode for reading from readonly sections is %s.\n"), | |
920d2a44 AC |
1478 | value); |
1479 | } | |
3a11626d | 1480 | |
7f79c47e | 1481 | /* Target vector read/write partial wrapper functions. */ |
0088c768 | 1482 | |
9b409511 | 1483 | static enum target_xfer_status |
1e3ff5ad AC |
1484 | target_read_partial (struct target_ops *ops, |
1485 | enum target_object object, | |
1b0ba102 | 1486 | const char *annex, gdb_byte *buf, |
9b409511 YQ |
1487 | ULONGEST offset, ULONGEST len, |
1488 | ULONGEST *xfered_len) | |
1e3ff5ad | 1489 | { |
9b409511 YQ |
1490 | return target_xfer_partial (ops, object, annex, buf, NULL, offset, len, |
1491 | xfered_len); | |
1e3ff5ad AC |
1492 | } |
1493 | ||
8a55ffb0 | 1494 | static enum target_xfer_status |
1e3ff5ad AC |
1495 | target_write_partial (struct target_ops *ops, |
1496 | enum target_object object, | |
1b0ba102 | 1497 | const char *annex, const gdb_byte *buf, |
9b409511 | 1498 | ULONGEST offset, LONGEST len, ULONGEST *xfered_len) |
1e3ff5ad | 1499 | { |
9b409511 YQ |
1500 | return target_xfer_partial (ops, object, annex, NULL, buf, offset, len, |
1501 | xfered_len); | |
1e3ff5ad AC |
1502 | } |
1503 | ||
1504 | /* Wrappers to perform the full transfer. */ | |
7f79c47e DE |
1505 | |
1506 | /* For docs on target_read see target.h. */ | |
1507 | ||
1e3ff5ad AC |
1508 | LONGEST |
1509 | target_read (struct target_ops *ops, | |
1510 | enum target_object object, | |
1b0ba102 | 1511 | const char *annex, gdb_byte *buf, |
1e3ff5ad AC |
1512 | ULONGEST offset, LONGEST len) |
1513 | { | |
279a6fed | 1514 | LONGEST xfered_total = 0; |
d309493c SM |
1515 | int unit_size = 1; |
1516 | ||
1517 | /* If we are reading from a memory object, find the length of an addressable | |
1518 | unit for that architecture. */ | |
1519 | if (object == TARGET_OBJECT_MEMORY | |
1520 | || object == TARGET_OBJECT_STACK_MEMORY | |
1521 | || object == TARGET_OBJECT_CODE_MEMORY | |
1522 | || object == TARGET_OBJECT_RAW_MEMORY) | |
1523 | unit_size = gdbarch_addressable_memory_unit_size (target_gdbarch ()); | |
5d502164 | 1524 | |
279a6fed | 1525 | while (xfered_total < len) |
1e3ff5ad | 1526 | { |
279a6fed | 1527 | ULONGEST xfered_partial; |
9b409511 YQ |
1528 | enum target_xfer_status status; |
1529 | ||
1530 | status = target_read_partial (ops, object, annex, | |
d309493c | 1531 | buf + xfered_total * unit_size, |
279a6fed SM |
1532 | offset + xfered_total, len - xfered_total, |
1533 | &xfered_partial); | |
5d502164 | 1534 | |
1e3ff5ad | 1535 | /* Call an observer, notifying them of the xfer progress? */ |
9b409511 | 1536 | if (status == TARGET_XFER_EOF) |
279a6fed | 1537 | return xfered_total; |
9b409511 YQ |
1538 | else if (status == TARGET_XFER_OK) |
1539 | { | |
279a6fed | 1540 | xfered_total += xfered_partial; |
9b409511 YQ |
1541 | QUIT; |
1542 | } | |
1543 | else | |
279a6fed | 1544 | return TARGET_XFER_E_IO; |
9b409511 | 1545 | |
1e3ff5ad AC |
1546 | } |
1547 | return len; | |
1548 | } | |
1549 | ||
f1a507a1 JB |
1550 | /* Assuming that the entire [begin, end) range of memory cannot be |
1551 | read, try to read whatever subrange is possible to read. | |
1552 | ||
1553 | The function returns, in RESULT, either zero or one memory block. | |
1554 | If there's a readable subrange at the beginning, it is completely | |
1555 | read and returned. Any further readable subrange will not be read. | |
1556 | Otherwise, if there's a readable subrange at the end, it will be | |
1557 | completely read and returned. Any readable subranges before it | |
1558 | (obviously, not starting at the beginning), will be ignored. In | |
1559 | other cases -- either no readable subrange, or readable subrange(s) | |
1560 | that is neither at the beginning, or end, nothing is returned. | |
1561 | ||
1562 | The purpose of this function is to handle a read across a boundary | |
1563 | of accessible memory in a case when memory map is not available. | |
1564 | The above restrictions are fine for this case, but will give | |
1565 | incorrect results if the memory is 'patchy'. However, supporting | |
1566 | 'patchy' memory would require trying to read every single byte, | |
1567 | and it seems unacceptable solution. Explicit memory map is | |
1568 | recommended for this case -- and target_read_memory_robust will | |
1569 | take care of reading multiple ranges then. */ | |
8dedea02 VP |
1570 | |
1571 | static void | |
3e43a32a | 1572 | read_whatever_is_readable (struct target_ops *ops, |
279a6fed | 1573 | const ULONGEST begin, const ULONGEST end, |
d309493c | 1574 | int unit_size, |
386c8614 | 1575 | std::vector<memory_read_result> *result) |
d5086790 | 1576 | { |
8dedea02 VP |
1577 | ULONGEST current_begin = begin; |
1578 | ULONGEST current_end = end; | |
1579 | int forward; | |
9b409511 | 1580 | ULONGEST xfered_len; |
8dedea02 VP |
1581 | |
1582 | /* If we previously failed to read 1 byte, nothing can be done here. */ | |
1583 | if (end - begin <= 1) | |
386c8614 TT |
1584 | return; |
1585 | ||
1586 | gdb::unique_xmalloc_ptr<gdb_byte> buf ((gdb_byte *) xmalloc (end - begin)); | |
8dedea02 VP |
1587 | |
1588 | /* Check that either first or the last byte is readable, and give up | |
c378eb4e | 1589 | if not. This heuristic is meant to permit reading accessible memory |
8dedea02 VP |
1590 | at the boundary of accessible region. */ |
1591 | if (target_read_partial (ops, TARGET_OBJECT_MEMORY, NULL, | |
386c8614 | 1592 | buf.get (), begin, 1, &xfered_len) == TARGET_XFER_OK) |
8dedea02 VP |
1593 | { |
1594 | forward = 1; | |
1595 | ++current_begin; | |
1596 | } | |
1597 | else if (target_read_partial (ops, TARGET_OBJECT_MEMORY, NULL, | |
386c8614 | 1598 | buf.get () + (end - begin) - 1, end - 1, 1, |
9b409511 | 1599 | &xfered_len) == TARGET_XFER_OK) |
8dedea02 VP |
1600 | { |
1601 | forward = 0; | |
1602 | --current_end; | |
1603 | } | |
1604 | else | |
386c8614 | 1605 | return; |
8dedea02 VP |
1606 | |
1607 | /* Loop invariant is that the [current_begin, current_end) was previously | |
1608 | found to be not readable as a whole. | |
1609 | ||
1610 | Note loop condition -- if the range has 1 byte, we can't divide the range | |
1611 | so there's no point trying further. */ | |
1612 | while (current_end - current_begin > 1) | |
1613 | { | |
1614 | ULONGEST first_half_begin, first_half_end; | |
1615 | ULONGEST second_half_begin, second_half_end; | |
1616 | LONGEST xfer; | |
279a6fed | 1617 | ULONGEST middle = current_begin + (current_end - current_begin) / 2; |
f1a507a1 | 1618 | |
8dedea02 VP |
1619 | if (forward) |
1620 | { | |
1621 | first_half_begin = current_begin; | |
1622 | first_half_end = middle; | |
1623 | second_half_begin = middle; | |
1624 | second_half_end = current_end; | |
1625 | } | |
1626 | else | |
1627 | { | |
1628 | first_half_begin = middle; | |
1629 | first_half_end = current_end; | |
1630 | second_half_begin = current_begin; | |
1631 | second_half_end = middle; | |
1632 | } | |
1633 | ||
1634 | xfer = target_read (ops, TARGET_OBJECT_MEMORY, NULL, | |
386c8614 | 1635 | buf.get () + (first_half_begin - begin) * unit_size, |
8dedea02 VP |
1636 | first_half_begin, |
1637 | first_half_end - first_half_begin); | |
1638 | ||
1639 | if (xfer == first_half_end - first_half_begin) | |
1640 | { | |
c378eb4e | 1641 | /* This half reads up fine. So, the error must be in the |
3e43a32a | 1642 | other half. */ |
8dedea02 VP |
1643 | current_begin = second_half_begin; |
1644 | current_end = second_half_end; | |
1645 | } | |
1646 | else | |
1647 | { | |
c378eb4e | 1648 | /* This half is not readable. Because we've tried one byte, we |
279a6fed | 1649 | know some part of this half if actually readable. Go to the next |
8dedea02 VP |
1650 | iteration to divide again and try to read. |
1651 | ||
1652 | We don't handle the other half, because this function only tries | |
1653 | to read a single readable subrange. */ | |
1654 | current_begin = first_half_begin; | |
1655 | current_end = first_half_end; | |
1656 | } | |
1657 | } | |
1658 | ||
1659 | if (forward) | |
1660 | { | |
1661 | /* The [begin, current_begin) range has been read. */ | |
386c8614 | 1662 | result->emplace_back (begin, current_end, std::move (buf)); |
8dedea02 VP |
1663 | } |
1664 | else | |
1665 | { | |
1666 | /* The [current_end, end) range has been read. */ | |
279a6fed | 1667 | LONGEST region_len = end - current_end; |
f1a507a1 | 1668 | |
386c8614 TT |
1669 | gdb::unique_xmalloc_ptr<gdb_byte> data |
1670 | ((gdb_byte *) xmalloc (region_len * unit_size)); | |
1671 | memcpy (data.get (), buf.get () + (current_end - begin) * unit_size, | |
d309493c | 1672 | region_len * unit_size); |
386c8614 | 1673 | result->emplace_back (current_end, end, std::move (data)); |
8dedea02 | 1674 | } |
8dedea02 VP |
1675 | } |
1676 | ||
386c8614 | 1677 | std::vector<memory_read_result> |
279a6fed SM |
1678 | read_memory_robust (struct target_ops *ops, |
1679 | const ULONGEST offset, const LONGEST len) | |
8dedea02 | 1680 | { |
386c8614 | 1681 | std::vector<memory_read_result> result; |
d309493c | 1682 | int unit_size = gdbarch_addressable_memory_unit_size (target_gdbarch ()); |
8dedea02 | 1683 | |
279a6fed SM |
1684 | LONGEST xfered_total = 0; |
1685 | while (xfered_total < len) | |
d5086790 | 1686 | { |
279a6fed SM |
1687 | struct mem_region *region = lookup_mem_region (offset + xfered_total); |
1688 | LONGEST region_len; | |
5d502164 | 1689 | |
8dedea02 VP |
1690 | /* If there is no explicit region, a fake one should be created. */ |
1691 | gdb_assert (region); | |
1692 | ||
1693 | if (region->hi == 0) | |
279a6fed | 1694 | region_len = len - xfered_total; |
8dedea02 | 1695 | else |
279a6fed | 1696 | region_len = region->hi - offset; |
8dedea02 VP |
1697 | |
1698 | if (region->attrib.mode == MEM_NONE || region->attrib.mode == MEM_WO) | |
d5086790 | 1699 | { |
c378eb4e | 1700 | /* Cannot read this region. Note that we can end up here only |
8dedea02 VP |
1701 | if the region is explicitly marked inaccessible, or |
1702 | 'inaccessible-by-default' is in effect. */ | |
279a6fed | 1703 | xfered_total += region_len; |
8dedea02 VP |
1704 | } |
1705 | else | |
1706 | { | |
325fac50 | 1707 | LONGEST to_read = std::min (len - xfered_total, region_len); |
386c8614 TT |
1708 | gdb::unique_xmalloc_ptr<gdb_byte> buffer |
1709 | ((gdb_byte *) xmalloc (to_read * unit_size)); | |
8dedea02 | 1710 | |
279a6fed | 1711 | LONGEST xfered_partial = |
386c8614 | 1712 | target_read (ops, TARGET_OBJECT_MEMORY, NULL, buffer.get (), |
279a6fed | 1713 | offset + xfered_total, to_read); |
8dedea02 | 1714 | /* Call an observer, notifying them of the xfer progress? */ |
279a6fed | 1715 | if (xfered_partial <= 0) |
d5086790 | 1716 | { |
c378eb4e | 1717 | /* Got an error reading full chunk. See if maybe we can read |
8dedea02 | 1718 | some subrange. */ |
e084c964 DB |
1719 | read_whatever_is_readable (ops, offset + xfered_total, |
1720 | offset + xfered_total + to_read, | |
1721 | unit_size, &result); | |
279a6fed | 1722 | xfered_total += to_read; |
d5086790 | 1723 | } |
8dedea02 VP |
1724 | else |
1725 | { | |
386c8614 TT |
1726 | result.emplace_back (offset + xfered_total, |
1727 | offset + xfered_total + xfered_partial, | |
1728 | std::move (buffer)); | |
279a6fed | 1729 | xfered_total += xfered_partial; |
8dedea02 VP |
1730 | } |
1731 | QUIT; | |
d5086790 | 1732 | } |
d5086790 | 1733 | } |
9d78f827 | 1734 | |
8dedea02 | 1735 | return result; |
d5086790 VP |
1736 | } |
1737 | ||
8dedea02 | 1738 | |
cf7a04e8 DJ |
1739 | /* An alternative to target_write with progress callbacks. */ |
1740 | ||
1e3ff5ad | 1741 | LONGEST |
cf7a04e8 DJ |
1742 | target_write_with_progress (struct target_ops *ops, |
1743 | enum target_object object, | |
1744 | const char *annex, const gdb_byte *buf, | |
1745 | ULONGEST offset, LONGEST len, | |
1746 | void (*progress) (ULONGEST, void *), void *baton) | |
1e3ff5ad | 1747 | { |
279a6fed | 1748 | LONGEST xfered_total = 0; |
d309493c SM |
1749 | int unit_size = 1; |
1750 | ||
1751 | /* If we are writing to a memory object, find the length of an addressable | |
1752 | unit for that architecture. */ | |
1753 | if (object == TARGET_OBJECT_MEMORY | |
1754 | || object == TARGET_OBJECT_STACK_MEMORY | |
1755 | || object == TARGET_OBJECT_CODE_MEMORY | |
1756 | || object == TARGET_OBJECT_RAW_MEMORY) | |
1757 | unit_size = gdbarch_addressable_memory_unit_size (target_gdbarch ()); | |
a76d924d DJ |
1758 | |
1759 | /* Give the progress callback a chance to set up. */ | |
1760 | if (progress) | |
1761 | (*progress) (0, baton); | |
1762 | ||
279a6fed | 1763 | while (xfered_total < len) |
1e3ff5ad | 1764 | { |
279a6fed | 1765 | ULONGEST xfered_partial; |
9b409511 YQ |
1766 | enum target_xfer_status status; |
1767 | ||
1768 | status = target_write_partial (ops, object, annex, | |
d309493c | 1769 | buf + xfered_total * unit_size, |
279a6fed SM |
1770 | offset + xfered_total, len - xfered_total, |
1771 | &xfered_partial); | |
cf7a04e8 | 1772 | |
5c328c05 | 1773 | if (status != TARGET_XFER_OK) |
279a6fed | 1774 | return status == TARGET_XFER_EOF ? xfered_total : TARGET_XFER_E_IO; |
cf7a04e8 DJ |
1775 | |
1776 | if (progress) | |
279a6fed | 1777 | (*progress) (xfered_partial, baton); |
cf7a04e8 | 1778 | |
279a6fed | 1779 | xfered_total += xfered_partial; |
1e3ff5ad AC |
1780 | QUIT; |
1781 | } | |
1782 | return len; | |
1783 | } | |
1784 | ||
7f79c47e DE |
1785 | /* For docs on target_write see target.h. */ |
1786 | ||
cf7a04e8 DJ |
1787 | LONGEST |
1788 | target_write (struct target_ops *ops, | |
1789 | enum target_object object, | |
1790 | const char *annex, const gdb_byte *buf, | |
1791 | ULONGEST offset, LONGEST len) | |
1792 | { | |
1793 | return target_write_with_progress (ops, object, annex, buf, offset, len, | |
1794 | NULL, NULL); | |
1795 | } | |
1796 | ||
9018be22 SM |
1797 | /* Help for target_read_alloc and target_read_stralloc. See their comments |
1798 | for details. */ | |
13547ab6 | 1799 | |
9018be22 SM |
1800 | template <typename T> |
1801 | gdb::optional<gdb::def_vector<T>> | |
159f81f3 | 1802 | target_read_alloc_1 (struct target_ops *ops, enum target_object object, |
9018be22 | 1803 | const char *annex) |
13547ab6 | 1804 | { |
9018be22 SM |
1805 | gdb::def_vector<T> buf; |
1806 | size_t buf_pos = 0; | |
1807 | const int chunk = 4096; | |
13547ab6 DJ |
1808 | |
1809 | /* This function does not have a length parameter; it reads the | |
1810 | entire OBJECT). Also, it doesn't support objects fetched partly | |
1811 | from one target and partly from another (in a different stratum, | |
1812 | e.g. a core file and an executable). Both reasons make it | |
1813 | unsuitable for reading memory. */ | |
1814 | gdb_assert (object != TARGET_OBJECT_MEMORY); | |
1815 | ||
1816 | /* Start by reading up to 4K at a time. The target will throttle | |
1817 | this number down if necessary. */ | |
13547ab6 DJ |
1818 | while (1) |
1819 | { | |
9b409511 YQ |
1820 | ULONGEST xfered_len; |
1821 | enum target_xfer_status status; | |
1822 | ||
9018be22 SM |
1823 | buf.resize (buf_pos + chunk); |
1824 | ||
1825 | status = target_read_partial (ops, object, annex, | |
1826 | (gdb_byte *) &buf[buf_pos], | |
1827 | buf_pos, chunk, | |
9b409511 YQ |
1828 | &xfered_len); |
1829 | ||
1830 | if (status == TARGET_XFER_EOF) | |
13547ab6 DJ |
1831 | { |
1832 | /* Read all there was. */ | |
9018be22 SM |
1833 | buf.resize (buf_pos); |
1834 | return buf; | |
13547ab6 | 1835 | } |
9b409511 YQ |
1836 | else if (status != TARGET_XFER_OK) |
1837 | { | |
1838 | /* An error occurred. */ | |
9018be22 | 1839 | return {}; |
9b409511 | 1840 | } |
13547ab6 | 1841 | |
9b409511 | 1842 | buf_pos += xfered_len; |
13547ab6 | 1843 | |
13547ab6 DJ |
1844 | QUIT; |
1845 | } | |
1846 | } | |
1847 | ||
9018be22 | 1848 | /* See target.h */ |
159f81f3 | 1849 | |
9018be22 | 1850 | gdb::optional<gdb::byte_vector> |
159f81f3 | 1851 | target_read_alloc (struct target_ops *ops, enum target_object object, |
9018be22 | 1852 | const char *annex) |
159f81f3 | 1853 | { |
9018be22 | 1854 | return target_read_alloc_1<gdb_byte> (ops, object, annex); |
159f81f3 DJ |
1855 | } |
1856 | ||
b7b030ad | 1857 | /* See target.h. */ |
159f81f3 | 1858 | |
9018be22 | 1859 | gdb::optional<gdb::char_vector> |
159f81f3 DJ |
1860 | target_read_stralloc (struct target_ops *ops, enum target_object object, |
1861 | const char *annex) | |
1862 | { | |
9018be22 SM |
1863 | gdb::optional<gdb::char_vector> buf |
1864 | = target_read_alloc_1<char> (ops, object, annex); | |
159f81f3 | 1865 | |
9018be22 SM |
1866 | if (!buf) |
1867 | return {}; | |
159f81f3 | 1868 | |
9018be22 SM |
1869 | if (buf->back () != '\0') |
1870 | buf->push_back ('\0'); | |
7313baad UW |
1871 | |
1872 | /* Check for embedded NUL bytes; but allow trailing NULs. */ | |
9018be22 SM |
1873 | for (auto it = std::find (buf->begin (), buf->end (), '\0'); |
1874 | it != buf->end (); it++) | |
1875 | if (*it != '\0') | |
7313baad UW |
1876 | { |
1877 | warning (_("target object %d, annex %s, " | |
1878 | "contained unexpected null characters"), | |
1879 | (int) object, annex ? annex : "(none)"); | |
1880 | break; | |
1881 | } | |
159f81f3 | 1882 | |
9018be22 | 1883 | return buf; |
159f81f3 DJ |
1884 | } |
1885 | ||
b6591e8b AC |
1886 | /* Memory transfer methods. */ |
1887 | ||
1888 | void | |
1b0ba102 | 1889 | get_target_memory (struct target_ops *ops, CORE_ADDR addr, gdb_byte *buf, |
b6591e8b AC |
1890 | LONGEST len) |
1891 | { | |
07b82ea5 PA |
1892 | /* This method is used to read from an alternate, non-current |
1893 | target. This read must bypass the overlay support (as symbols | |
1894 | don't match this target), and GDB's internal cache (wrong cache | |
1895 | for this target). */ | |
1896 | if (target_read (ops, TARGET_OBJECT_RAW_MEMORY, NULL, buf, addr, len) | |
b6591e8b | 1897 | != len) |
578d3588 | 1898 | memory_error (TARGET_XFER_E_IO, addr); |
b6591e8b AC |
1899 | } |
1900 | ||
1901 | ULONGEST | |
5d502164 MS |
1902 | get_target_memory_unsigned (struct target_ops *ops, CORE_ADDR addr, |
1903 | int len, enum bfd_endian byte_order) | |
b6591e8b | 1904 | { |
f6519ebc | 1905 | gdb_byte buf[sizeof (ULONGEST)]; |
b6591e8b AC |
1906 | |
1907 | gdb_assert (len <= sizeof (buf)); | |
1908 | get_target_memory (ops, addr, buf, len); | |
e17a4113 | 1909 | return extract_unsigned_integer (buf, len, byte_order); |
b6591e8b AC |
1910 | } |
1911 | ||
3db08215 MM |
1912 | /* See target.h. */ |
1913 | ||
d914c394 SS |
1914 | int |
1915 | target_insert_breakpoint (struct gdbarch *gdbarch, | |
1916 | struct bp_target_info *bp_tgt) | |
1917 | { | |
1918 | if (!may_insert_breakpoints) | |
1919 | { | |
1920 | warning (_("May not insert breakpoints")); | |
1921 | return 1; | |
1922 | } | |
1923 | ||
8b88a78e | 1924 | return current_top_target ()->insert_breakpoint (gdbarch, bp_tgt); |
d914c394 SS |
1925 | } |
1926 | ||
3db08215 MM |
1927 | /* See target.h. */ |
1928 | ||
d914c394 | 1929 | int |
6b84065d | 1930 | target_remove_breakpoint (struct gdbarch *gdbarch, |
73971819 PA |
1931 | struct bp_target_info *bp_tgt, |
1932 | enum remove_bp_reason reason) | |
d914c394 SS |
1933 | { |
1934 | /* This is kind of a weird case to handle, but the permission might | |
1935 | have been changed after breakpoints were inserted - in which case | |
1936 | we should just take the user literally and assume that any | |
1937 | breakpoints should be left in place. */ | |
1938 | if (!may_insert_breakpoints) | |
1939 | { | |
1940 | warning (_("May not remove breakpoints")); | |
1941 | return 1; | |
1942 | } | |
1943 | ||
8b88a78e | 1944 | return current_top_target ()->remove_breakpoint (gdbarch, bp_tgt, reason); |
d914c394 SS |
1945 | } |
1946 | ||
c906108c | 1947 | static void |
1d12d88f | 1948 | info_target_command (const char *args, int from_tty) |
c906108c | 1949 | { |
c906108c | 1950 | int has_all_mem = 0; |
c5aa993b | 1951 | |
c906108c | 1952 | if (symfile_objfile != NULL) |
4262abfb JK |
1953 | printf_unfiltered (_("Symbols from \"%s\".\n"), |
1954 | objfile_name (symfile_objfile)); | |
c906108c | 1955 | |
b6a8c27b | 1956 | for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
c906108c | 1957 | { |
f6ac5f3d | 1958 | if (!t->has_memory ()) |
c906108c SS |
1959 | continue; |
1960 | ||
c5aa993b | 1961 | if ((int) (t->to_stratum) <= (int) dummy_stratum) |
c906108c SS |
1962 | continue; |
1963 | if (has_all_mem) | |
3e43a32a MS |
1964 | printf_unfiltered (_("\tWhile running this, " |
1965 | "GDB does not access memory from...\n")); | |
f6ac5f3d PA |
1966 | printf_unfiltered ("%s:\n", t->longname ()); |
1967 | t->files_info (); | |
1968 | has_all_mem = t->has_all_memory (); | |
c906108c SS |
1969 | } |
1970 | } | |
1971 | ||
fd79ecee DJ |
1972 | /* This function is called before any new inferior is created, e.g. |
1973 | by running a program, attaching, or connecting to a target. | |
1974 | It cleans up any state from previous invocations which might | |
1975 | change between runs. This is a subset of what target_preopen | |
1976 | resets (things which might change between targets). */ | |
1977 | ||
1978 | void | |
1979 | target_pre_inferior (int from_tty) | |
1980 | { | |
c378eb4e | 1981 | /* Clear out solib state. Otherwise the solib state of the previous |
b9db4ced | 1982 | inferior might have survived and is entirely wrong for the new |
c378eb4e | 1983 | target. This has been observed on GNU/Linux using glibc 2.3. How |
b9db4ced UW |
1984 | to reproduce: |
1985 | ||
1986 | bash$ ./foo& | |
1987 | [1] 4711 | |
1988 | bash$ ./foo& | |
1989 | [1] 4712 | |
1990 | bash$ gdb ./foo | |
1991 | [...] | |
1992 | (gdb) attach 4711 | |
1993 | (gdb) detach | |
1994 | (gdb) attach 4712 | |
1995 | Cannot access memory at address 0xdeadbeef | |
1996 | */ | |
b9db4ced | 1997 | |
50c71eaf PA |
1998 | /* In some OSs, the shared library list is the same/global/shared |
1999 | across inferiors. If code is shared between processes, so are | |
2000 | memory regions and features. */ | |
f5656ead | 2001 | if (!gdbarch_has_global_solist (target_gdbarch ())) |
50c71eaf PA |
2002 | { |
2003 | no_shared_libraries (NULL, from_tty); | |
2004 | ||
2005 | invalidate_target_mem_regions (); | |
424163ea | 2006 | |
50c71eaf PA |
2007 | target_clear_description (); |
2008 | } | |
8ffcbaaf | 2009 | |
e9756d52 PP |
2010 | /* attach_flag may be set if the previous process associated with |
2011 | the inferior was attached to. */ | |
2012 | current_inferior ()->attach_flag = 0; | |
2013 | ||
5d5658a1 PA |
2014 | current_inferior ()->highest_thread_num = 0; |
2015 | ||
8ffcbaaf | 2016 | agent_capability_invalidate (); |
fd79ecee DJ |
2017 | } |
2018 | ||
b8fa0bfa PA |
2019 | /* Callback for iterate_over_inferiors. Gets rid of the given |
2020 | inferior. */ | |
2021 | ||
2022 | static int | |
2023 | dispose_inferior (struct inferior *inf, void *args) | |
2024 | { | |
9d4a934c AB |
2025 | /* Not all killed inferiors can, or will ever be, removed from the |
2026 | inferior list. Killed inferiors clearly don't need to be killed | |
2027 | again, so, we're done. */ | |
2028 | if (inf->pid == 0) | |
2029 | return 0; | |
2030 | ||
00431a78 PA |
2031 | thread_info *thread = any_thread_of_inferior (inf); |
2032 | if (thread != NULL) | |
b8fa0bfa | 2033 | { |
00431a78 | 2034 | switch_to_thread (thread); |
b8fa0bfa PA |
2035 | |
2036 | /* Core inferiors actually should be detached, not killed. */ | |
2037 | if (target_has_execution) | |
2038 | target_kill (); | |
2039 | else | |
6e1e1966 | 2040 | target_detach (inf, 0); |
b8fa0bfa PA |
2041 | } |
2042 | ||
2043 | return 0; | |
2044 | } | |
2045 | ||
c906108c SS |
2046 | /* This is to be called by the open routine before it does |
2047 | anything. */ | |
2048 | ||
2049 | void | |
fba45db2 | 2050 | target_preopen (int from_tty) |
c906108c | 2051 | { |
c5aa993b | 2052 | dont_repeat (); |
c906108c | 2053 | |
b8fa0bfa | 2054 | if (have_inferiors ()) |
c5aa993b | 2055 | { |
adf40b2e | 2056 | if (!from_tty |
b8fa0bfa PA |
2057 | || !have_live_inferiors () |
2058 | || query (_("A program is being debugged already. Kill it? "))) | |
2059 | iterate_over_inferiors (dispose_inferior, NULL); | |
c906108c | 2060 | else |
8a3fe4f8 | 2061 | error (_("Program not killed.")); |
c906108c SS |
2062 | } |
2063 | ||
2064 | /* Calling target_kill may remove the target from the stack. But if | |
2065 | it doesn't (which seems like a win for UDI), remove it now. */ | |
87ab71f0 PA |
2066 | /* Leave the exec target, though. The user may be switching from a |
2067 | live process to a core of the same program. */ | |
460014f5 | 2068 | pop_all_targets_above (file_stratum); |
fd79ecee DJ |
2069 | |
2070 | target_pre_inferior (from_tty); | |
c906108c SS |
2071 | } |
2072 | ||
6bd6f3b6 | 2073 | /* See target.h. */ |
c906108c SS |
2074 | |
2075 | void | |
6e1e1966 | 2076 | target_detach (inferior *inf, int from_tty) |
c906108c | 2077 | { |
6e1e1966 SM |
2078 | /* As long as some to_detach implementations rely on the current_inferior |
2079 | (either directly, or indirectly, like through target_gdbarch or by | |
2080 | reading memory), INF needs to be the current inferior. When that | |
2081 | requirement will become no longer true, then we can remove this | |
2082 | assertion. */ | |
2083 | gdb_assert (inf == current_inferior ()); | |
2084 | ||
f5656ead | 2085 | if (gdbarch_has_global_breakpoints (target_gdbarch ())) |
50c71eaf PA |
2086 | /* Don't remove global breakpoints here. They're removed on |
2087 | disconnection from the target. */ | |
2088 | ; | |
2089 | else | |
2090 | /* If we're in breakpoints-always-inserted mode, have to remove | |
00431a78 PA |
2091 | breakpoints before detaching. */ |
2092 | remove_breakpoints_inf (current_inferior ()); | |
74960c60 | 2093 | |
24291992 PA |
2094 | prepare_for_detach (); |
2095 | ||
8b88a78e | 2096 | current_top_target ()->detach (inf, from_tty); |
c906108c SS |
2097 | } |
2098 | ||
6ad8ae5c | 2099 | void |
fee354ee | 2100 | target_disconnect (const char *args, int from_tty) |
6ad8ae5c | 2101 | { |
50c71eaf PA |
2102 | /* If we're in breakpoints-always-inserted mode or if breakpoints |
2103 | are global across processes, we have to remove them before | |
2104 | disconnecting. */ | |
74960c60 VP |
2105 | remove_breakpoints (); |
2106 | ||
8b88a78e | 2107 | current_top_target ()->disconnect (args, from_tty); |
6ad8ae5c DJ |
2108 | } |
2109 | ||
f2b9e3df SDJ |
2110 | /* See target/target.h. */ |
2111 | ||
117de6a9 | 2112 | ptid_t |
47608cb1 | 2113 | target_wait (ptid_t ptid, struct target_waitstatus *status, int options) |
117de6a9 | 2114 | { |
8b88a78e | 2115 | return current_top_target ()->wait (ptid, status, options); |
117de6a9 PA |
2116 | } |
2117 | ||
0b333c5e PA |
2118 | /* See target.h. */ |
2119 | ||
2120 | ptid_t | |
2121 | default_target_wait (struct target_ops *ops, | |
2122 | ptid_t ptid, struct target_waitstatus *status, | |
2123 | int options) | |
2124 | { | |
2125 | status->kind = TARGET_WAITKIND_IGNORE; | |
2126 | return minus_one_ptid; | |
2127 | } | |
2128 | ||
7a114964 | 2129 | const char * |
117de6a9 PA |
2130 | target_pid_to_str (ptid_t ptid) |
2131 | { | |
8b88a78e | 2132 | return current_top_target ()->pid_to_str (ptid); |
117de6a9 PA |
2133 | } |
2134 | ||
73ede765 | 2135 | const char * |
4694da01 TT |
2136 | target_thread_name (struct thread_info *info) |
2137 | { | |
8b88a78e | 2138 | return current_top_target ()->thread_name (info); |
4694da01 TT |
2139 | } |
2140 | ||
e04ee09e KB |
2141 | struct thread_info * |
2142 | target_thread_handle_to_thread_info (const gdb_byte *thread_handle, | |
2143 | int handle_len, | |
2144 | struct inferior *inf) | |
2145 | { | |
8b88a78e | 2146 | return current_top_target ()->thread_handle_to_thread_info (thread_handle, |
f6ac5f3d | 2147 | handle_len, inf); |
e04ee09e KB |
2148 | } |
2149 | ||
e1ac3328 | 2150 | void |
2ea28649 | 2151 | target_resume (ptid_t ptid, int step, enum gdb_signal signal) |
e1ac3328 | 2152 | { |
4e5d721f | 2153 | target_dcache_invalidate (); |
28439f5e | 2154 | |
8b88a78e | 2155 | current_top_target ()->resume (ptid, step, signal); |
28439f5e | 2156 | |
6b84065d | 2157 | registers_changed_ptid (ptid); |
251bde03 | 2158 | /* We only set the internal executing state here. The user/frontend |
f2ffa92b PA |
2159 | running state is set at a higher level. This also clears the |
2160 | thread's stop_pc as side effect. */ | |
6b84065d | 2161 | set_executing (ptid, 1); |
6b84065d | 2162 | clear_inline_frame_state (ptid); |
e1ac3328 | 2163 | } |
2455069d | 2164 | |
85ad3aaf PA |
2165 | /* If true, target_commit_resume is a nop. */ |
2166 | static int defer_target_commit_resume; | |
2167 | ||
2168 | /* See target.h. */ | |
2169 | ||
2170 | void | |
2171 | target_commit_resume (void) | |
2172 | { | |
85ad3aaf PA |
2173 | if (defer_target_commit_resume) |
2174 | return; | |
2175 | ||
8b88a78e | 2176 | current_top_target ()->commit_resume (); |
85ad3aaf PA |
2177 | } |
2178 | ||
2179 | /* See target.h. */ | |
2180 | ||
a9bc57b9 TT |
2181 | scoped_restore_tmpl<int> |
2182 | make_scoped_defer_target_commit_resume () | |
85ad3aaf | 2183 | { |
a9bc57b9 | 2184 | return make_scoped_restore (&defer_target_commit_resume, 1); |
85ad3aaf PA |
2185 | } |
2186 | ||
2455069d UW |
2187 | void |
2188 | target_pass_signals (int numsigs, unsigned char *pass_signals) | |
2189 | { | |
8b88a78e | 2190 | current_top_target ()->pass_signals (numsigs, pass_signals); |
2455069d UW |
2191 | } |
2192 | ||
9b224c5e PA |
2193 | void |
2194 | target_program_signals (int numsigs, unsigned char *program_signals) | |
2195 | { | |
8b88a78e | 2196 | current_top_target ()->program_signals (numsigs, program_signals); |
9b224c5e PA |
2197 | } |
2198 | ||
098dba18 TT |
2199 | static int |
2200 | default_follow_fork (struct target_ops *self, int follow_child, | |
2201 | int detach_fork) | |
2202 | { | |
2203 | /* Some target returned a fork event, but did not know how to follow it. */ | |
2204 | internal_error (__FILE__, __LINE__, | |
2205 | _("could not find a target to follow fork")); | |
2206 | } | |
2207 | ||
ee057212 DJ |
2208 | /* Look through the list of possible targets for a target that can |
2209 | follow forks. */ | |
2210 | ||
2211 | int | |
07107ca6 | 2212 | target_follow_fork (int follow_child, int detach_fork) |
ee057212 | 2213 | { |
8b88a78e | 2214 | return current_top_target ()->follow_fork (follow_child, detach_fork); |
ee057212 DJ |
2215 | } |
2216 | ||
94585166 DB |
2217 | /* Target wrapper for follow exec hook. */ |
2218 | ||
2219 | void | |
2220 | target_follow_exec (struct inferior *inf, char *execd_pathname) | |
2221 | { | |
8b88a78e | 2222 | current_top_target ()->follow_exec (inf, execd_pathname); |
94585166 DB |
2223 | } |
2224 | ||
8d657035 TT |
2225 | static void |
2226 | default_mourn_inferior (struct target_ops *self) | |
2227 | { | |
2228 | internal_error (__FILE__, __LINE__, | |
2229 | _("could not find a target to follow mourn inferior")); | |
2230 | } | |
2231 | ||
136d6dae | 2232 | void |
bc1e6c81 | 2233 | target_mourn_inferior (ptid_t ptid) |
136d6dae | 2234 | { |
d7e15655 | 2235 | gdb_assert (ptid == inferior_ptid); |
8b88a78e | 2236 | current_top_target ()->mourn_inferior (); |
136d6dae | 2237 | |
8d657035 TT |
2238 | /* We no longer need to keep handles on any of the object files. |
2239 | Make sure to release them to avoid unnecessarily locking any | |
2240 | of them while we're not actually debugging. */ | |
2241 | bfd_cache_close_all (); | |
136d6dae VP |
2242 | } |
2243 | ||
424163ea DJ |
2244 | /* Look for a target which can describe architectural features, starting |
2245 | from TARGET. If we find one, return its description. */ | |
2246 | ||
2247 | const struct target_desc * | |
2248 | target_read_description (struct target_ops *target) | |
2249 | { | |
f6ac5f3d | 2250 | return target->read_description (); |
424163ea DJ |
2251 | } |
2252 | ||
58a5184e | 2253 | /* This implements a basic search of memory, reading target memory and |
08388c79 DE |
2254 | performing the search here (as opposed to performing the search in on the |
2255 | target side with, for example, gdbserver). */ | |
2256 | ||
2257 | int | |
2258 | simple_search_memory (struct target_ops *ops, | |
2259 | CORE_ADDR start_addr, ULONGEST search_space_len, | |
2260 | const gdb_byte *pattern, ULONGEST pattern_len, | |
2261 | CORE_ADDR *found_addrp) | |
2262 | { | |
2263 | /* NOTE: also defined in find.c testcase. */ | |
2264 | #define SEARCH_CHUNK_SIZE 16000 | |
2265 | const unsigned chunk_size = SEARCH_CHUNK_SIZE; | |
2266 | /* Buffer to hold memory contents for searching. */ | |
08388c79 | 2267 | unsigned search_buf_size; |
08388c79 DE |
2268 | |
2269 | search_buf_size = chunk_size + pattern_len - 1; | |
2270 | ||
2271 | /* No point in trying to allocate a buffer larger than the search space. */ | |
2272 | if (search_space_len < search_buf_size) | |
2273 | search_buf_size = search_space_len; | |
2274 | ||
26fcd5d7 | 2275 | gdb::byte_vector search_buf (search_buf_size); |
08388c79 DE |
2276 | |
2277 | /* Prime the search buffer. */ | |
2278 | ||
2279 | if (target_read (ops, TARGET_OBJECT_MEMORY, NULL, | |
26fcd5d7 TT |
2280 | search_buf.data (), start_addr, search_buf_size) |
2281 | != search_buf_size) | |
08388c79 | 2282 | { |
b3dc46ff AB |
2283 | warning (_("Unable to access %s bytes of target " |
2284 | "memory at %s, halting search."), | |
2285 | pulongest (search_buf_size), hex_string (start_addr)); | |
08388c79 DE |
2286 | return -1; |
2287 | } | |
2288 | ||
2289 | /* Perform the search. | |
2290 | ||
2291 | The loop is kept simple by allocating [N + pattern-length - 1] bytes. | |
2292 | When we've scanned N bytes we copy the trailing bytes to the start and | |
2293 | read in another N bytes. */ | |
2294 | ||
2295 | while (search_space_len >= pattern_len) | |
2296 | { | |
2297 | gdb_byte *found_ptr; | |
325fac50 PA |
2298 | unsigned nr_search_bytes |
2299 | = std::min (search_space_len, (ULONGEST) search_buf_size); | |
08388c79 | 2300 | |
26fcd5d7 | 2301 | found_ptr = (gdb_byte *) memmem (search_buf.data (), nr_search_bytes, |
d7f3ff3e | 2302 | pattern, pattern_len); |
08388c79 DE |
2303 | |
2304 | if (found_ptr != NULL) | |
2305 | { | |
26fcd5d7 | 2306 | CORE_ADDR found_addr = start_addr + (found_ptr - search_buf.data ()); |
5d502164 | 2307 | |
08388c79 | 2308 | *found_addrp = found_addr; |
08388c79 DE |
2309 | return 1; |
2310 | } | |
2311 | ||
2312 | /* Not found in this chunk, skip to next chunk. */ | |
2313 | ||
2314 | /* Don't let search_space_len wrap here, it's unsigned. */ | |
2315 | if (search_space_len >= chunk_size) | |
2316 | search_space_len -= chunk_size; | |
2317 | else | |
2318 | search_space_len = 0; | |
2319 | ||
2320 | if (search_space_len >= pattern_len) | |
2321 | { | |
2322 | unsigned keep_len = search_buf_size - chunk_size; | |
8a35fb51 | 2323 | CORE_ADDR read_addr = start_addr + chunk_size + keep_len; |
08388c79 DE |
2324 | int nr_to_read; |
2325 | ||
2326 | /* Copy the trailing part of the previous iteration to the front | |
2327 | of the buffer for the next iteration. */ | |
2328 | gdb_assert (keep_len == pattern_len - 1); | |
26fcd5d7 | 2329 | memcpy (&search_buf[0], &search_buf[chunk_size], keep_len); |
08388c79 | 2330 | |
325fac50 PA |
2331 | nr_to_read = std::min (search_space_len - keep_len, |
2332 | (ULONGEST) chunk_size); | |
08388c79 DE |
2333 | |
2334 | if (target_read (ops, TARGET_OBJECT_MEMORY, NULL, | |
26fcd5d7 | 2335 | &search_buf[keep_len], read_addr, |
08388c79 DE |
2336 | nr_to_read) != nr_to_read) |
2337 | { | |
b3dc46ff | 2338 | warning (_("Unable to access %s bytes of target " |
9b20d036 | 2339 | "memory at %s, halting search."), |
b3dc46ff | 2340 | plongest (nr_to_read), |
08388c79 | 2341 | hex_string (read_addr)); |
08388c79 DE |
2342 | return -1; |
2343 | } | |
2344 | ||
2345 | start_addr += chunk_size; | |
2346 | } | |
2347 | } | |
2348 | ||
2349 | /* Not found. */ | |
2350 | ||
08388c79 DE |
2351 | return 0; |
2352 | } | |
2353 | ||
58a5184e TT |
2354 | /* Default implementation of memory-searching. */ |
2355 | ||
2356 | static int | |
2357 | default_search_memory (struct target_ops *self, | |
2358 | CORE_ADDR start_addr, ULONGEST search_space_len, | |
2359 | const gdb_byte *pattern, ULONGEST pattern_len, | |
2360 | CORE_ADDR *found_addrp) | |
2361 | { | |
2362 | /* Start over from the top of the target stack. */ | |
8b88a78e | 2363 | return simple_search_memory (current_top_target (), |
58a5184e TT |
2364 | start_addr, search_space_len, |
2365 | pattern, pattern_len, found_addrp); | |
2366 | } | |
2367 | ||
08388c79 DE |
2368 | /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the |
2369 | sequence of bytes in PATTERN with length PATTERN_LEN. | |
2370 | ||
2371 | The result is 1 if found, 0 if not found, and -1 if there was an error | |
2372 | requiring halting of the search (e.g. memory read error). | |
2373 | If the pattern is found the address is recorded in FOUND_ADDRP. */ | |
2374 | ||
2375 | int | |
2376 | target_search_memory (CORE_ADDR start_addr, ULONGEST search_space_len, | |
2377 | const gdb_byte *pattern, ULONGEST pattern_len, | |
2378 | CORE_ADDR *found_addrp) | |
2379 | { | |
8b88a78e | 2380 | return current_top_target ()->search_memory (start_addr, search_space_len, |
f6ac5f3d | 2381 | pattern, pattern_len, found_addrp); |
08388c79 DE |
2382 | } |
2383 | ||
8edfe269 DJ |
2384 | /* Look through the currently pushed targets. If none of them will |
2385 | be able to restart the currently running process, issue an error | |
2386 | message. */ | |
2387 | ||
2388 | void | |
2389 | target_require_runnable (void) | |
2390 | { | |
b6a8c27b | 2391 | for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
8edfe269 DJ |
2392 | { |
2393 | /* If this target knows how to create a new program, then | |
2394 | assume we will still be able to after killing the current | |
2395 | one. Either killing and mourning will not pop T, or else | |
2396 | find_default_run_target will find it again. */ | |
f6ac5f3d | 2397 | if (t->can_create_inferior ()) |
8edfe269 DJ |
2398 | return; |
2399 | ||
548740d6 | 2400 | /* Do not worry about targets at certain strata that can not |
8edfe269 DJ |
2401 | create inferiors. Assume they will be pushed again if |
2402 | necessary, and continue to the process_stratum. */ | |
f6ac5f3d | 2403 | if (t->to_stratum > process_stratum) |
8edfe269 DJ |
2404 | continue; |
2405 | ||
3e43a32a MS |
2406 | error (_("The \"%s\" target does not support \"run\". " |
2407 | "Try \"help target\" or \"continue\"."), | |
f6ac5f3d | 2408 | t->shortname ()); |
8edfe269 DJ |
2409 | } |
2410 | ||
2411 | /* This function is only called if the target is running. In that | |
2412 | case there should have been a process_stratum target and it | |
c378eb4e | 2413 | should either know how to create inferiors, or not... */ |
9b20d036 | 2414 | internal_error (__FILE__, __LINE__, _("No targets found")); |
8edfe269 DJ |
2415 | } |
2416 | ||
6a3cb8e8 PA |
2417 | /* Whether GDB is allowed to fall back to the default run target for |
2418 | "run", "attach", etc. when no target is connected yet. */ | |
2419 | static int auto_connect_native_target = 1; | |
2420 | ||
2421 | static void | |
2422 | show_auto_connect_native_target (struct ui_file *file, int from_tty, | |
2423 | struct cmd_list_element *c, const char *value) | |
2424 | { | |
2425 | fprintf_filtered (file, | |
2426 | _("Whether GDB may automatically connect to the " | |
2427 | "native target is %s.\n"), | |
2428 | value); | |
2429 | } | |
2430 | ||
d9f719f1 PA |
2431 | /* A pointer to the target that can respond to "run" or "attach". |
2432 | Native targets are always singletons and instantiated early at GDB | |
2433 | startup. */ | |
2434 | static target_ops *the_native_target; | |
2435 | ||
2436 | /* See target.h. */ | |
2437 | ||
2438 | void | |
2439 | set_native_target (target_ops *target) | |
2440 | { | |
2441 | if (the_native_target != NULL) | |
2442 | internal_error (__FILE__, __LINE__, | |
2443 | _("native target already set (\"%s\")."), | |
2444 | the_native_target->longname ()); | |
2445 | ||
2446 | the_native_target = target; | |
2447 | } | |
2448 | ||
2449 | /* See target.h. */ | |
2450 | ||
2451 | target_ops * | |
2452 | get_native_target () | |
2453 | { | |
2454 | return the_native_target; | |
2455 | } | |
2456 | ||
c906108c SS |
2457 | /* Look through the list of possible targets for a target that can |
2458 | execute a run or attach command without any other data. This is | |
2459 | used to locate the default process stratum. | |
2460 | ||
5f667f2d PA |
2461 | If DO_MESG is not NULL, the result is always valid (error() is |
2462 | called for errors); else, return NULL on error. */ | |
c906108c SS |
2463 | |
2464 | static struct target_ops * | |
a121b7c1 | 2465 | find_default_run_target (const char *do_mesg) |
c906108c | 2466 | { |
d9f719f1 PA |
2467 | if (auto_connect_native_target && the_native_target != NULL) |
2468 | return the_native_target; | |
c906108c | 2469 | |
d9f719f1 PA |
2470 | if (do_mesg != NULL) |
2471 | error (_("Don't know how to %s. Try \"help target\"."), do_mesg); | |
2472 | return NULL; | |
c906108c SS |
2473 | } |
2474 | ||
b3ccfe11 | 2475 | /* See target.h. */ |
c906108c | 2476 | |
b3ccfe11 TT |
2477 | struct target_ops * |
2478 | find_attach_target (void) | |
c906108c | 2479 | { |
b3ccfe11 | 2480 | /* If a target on the current stack can attach, use it. */ |
b6a8c27b | 2481 | for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
b3ccfe11 | 2482 | { |
f6ac5f3d | 2483 | if (t->can_attach ()) |
d9f719f1 | 2484 | return t; |
b3ccfe11 | 2485 | } |
c906108c | 2486 | |
b3ccfe11 | 2487 | /* Otherwise, use the default run target for attaching. */ |
d9f719f1 | 2488 | return find_default_run_target ("attach"); |
b84876c2 PA |
2489 | } |
2490 | ||
b3ccfe11 | 2491 | /* See target.h. */ |
b84876c2 | 2492 | |
b3ccfe11 TT |
2493 | struct target_ops * |
2494 | find_run_target (void) | |
9908b566 | 2495 | { |
f6ac5f3d | 2496 | /* If a target on the current stack can run, use it. */ |
b6a8c27b | 2497 | for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
b3ccfe11 | 2498 | { |
f6ac5f3d | 2499 | if (t->can_create_inferior ()) |
d9f719f1 | 2500 | return t; |
b3ccfe11 | 2501 | } |
5d502164 | 2502 | |
b3ccfe11 | 2503 | /* Otherwise, use the default run target. */ |
d9f719f1 | 2504 | return find_default_run_target ("run"); |
9908b566 VP |
2505 | } |
2506 | ||
f6ac5f3d PA |
2507 | bool |
2508 | target_ops::info_proc (const char *args, enum info_proc_what what) | |
2509 | { | |
2510 | return false; | |
2511 | } | |
2512 | ||
145b16a9 UW |
2513 | /* Implement the "info proc" command. */ |
2514 | ||
451b7c33 | 2515 | int |
7bc112c1 | 2516 | target_info_proc (const char *args, enum info_proc_what what) |
145b16a9 UW |
2517 | { |
2518 | struct target_ops *t; | |
2519 | ||
2520 | /* If we're already connected to something that can get us OS | |
2521 | related data, use it. Otherwise, try using the native | |
2522 | target. */ | |
f6ac5f3d PA |
2523 | t = find_target_at (process_stratum); |
2524 | if (t == NULL) | |
145b16a9 UW |
2525 | t = find_default_run_target (NULL); |
2526 | ||
b6a8c27b | 2527 | for (; t != NULL; t = t->beneath ()) |
145b16a9 | 2528 | { |
f6ac5f3d | 2529 | if (t->info_proc (args, what)) |
145b16a9 | 2530 | { |
145b16a9 UW |
2531 | if (targetdebug) |
2532 | fprintf_unfiltered (gdb_stdlog, | |
2533 | "target_info_proc (\"%s\", %d)\n", args, what); | |
2534 | ||
451b7c33 | 2535 | return 1; |
145b16a9 UW |
2536 | } |
2537 | } | |
2538 | ||
451b7c33 | 2539 | return 0; |
145b16a9 UW |
2540 | } |
2541 | ||
03583c20 | 2542 | static int |
2bfc0540 | 2543 | find_default_supports_disable_randomization (struct target_ops *self) |
03583c20 UW |
2544 | { |
2545 | struct target_ops *t; | |
2546 | ||
2547 | t = find_default_run_target (NULL); | |
f6ac5f3d PA |
2548 | if (t != NULL) |
2549 | return t->supports_disable_randomization (); | |
03583c20 UW |
2550 | return 0; |
2551 | } | |
2552 | ||
2553 | int | |
2554 | target_supports_disable_randomization (void) | |
2555 | { | |
8b88a78e | 2556 | return current_top_target ()->supports_disable_randomization (); |
03583c20 | 2557 | } |
9908b566 | 2558 | |
1fb77080 SDJ |
2559 | /* See target/target.h. */ |
2560 | ||
2561 | int | |
2562 | target_supports_multi_process (void) | |
2563 | { | |
8b88a78e | 2564 | return current_top_target ()->supports_multi_process (); |
1fb77080 SDJ |
2565 | } |
2566 | ||
b7b030ad TT |
2567 | /* See target.h. */ |
2568 | ||
9018be22 | 2569 | gdb::optional<gdb::char_vector> |
07e059b5 VP |
2570 | target_get_osdata (const char *type) |
2571 | { | |
07e059b5 VP |
2572 | struct target_ops *t; |
2573 | ||
739ef7fb PA |
2574 | /* If we're already connected to something that can get us OS |
2575 | related data, use it. Otherwise, try using the native | |
2576 | target. */ | |
f6ac5f3d PA |
2577 | t = find_target_at (process_stratum); |
2578 | if (t == NULL) | |
739ef7fb | 2579 | t = find_default_run_target ("get OS data"); |
07e059b5 VP |
2580 | |
2581 | if (!t) | |
9018be22 | 2582 | return {}; |
07e059b5 | 2583 | |
6d097e65 | 2584 | return target_read_stralloc (t, TARGET_OBJECT_OSDATA, type); |
07e059b5 VP |
2585 | } |
2586 | ||
8eaff7cd TT |
2587 | static struct address_space * |
2588 | default_thread_address_space (struct target_ops *self, ptid_t ptid) | |
6c95b8df PA |
2589 | { |
2590 | struct inferior *inf; | |
6c95b8df PA |
2591 | |
2592 | /* Fall-back to the "main" address space of the inferior. */ | |
c9657e70 | 2593 | inf = find_inferior_ptid (ptid); |
6c95b8df PA |
2594 | |
2595 | if (inf == NULL || inf->aspace == NULL) | |
3e43a32a | 2596 | internal_error (__FILE__, __LINE__, |
9b20d036 MS |
2597 | _("Can't determine the current " |
2598 | "address space of thread %s\n"), | |
6c95b8df PA |
2599 | target_pid_to_str (ptid)); |
2600 | ||
2601 | return inf->aspace; | |
2602 | } | |
2603 | ||
8eaff7cd TT |
2604 | /* Determine the current address space of thread PTID. */ |
2605 | ||
2606 | struct address_space * | |
2607 | target_thread_address_space (ptid_t ptid) | |
2608 | { | |
2609 | struct address_space *aspace; | |
2610 | ||
8b88a78e | 2611 | aspace = current_top_target ()->thread_address_space (ptid); |
8eaff7cd TT |
2612 | gdb_assert (aspace != NULL); |
2613 | ||
8eaff7cd TT |
2614 | return aspace; |
2615 | } | |
2616 | ||
b6a8c27b PA |
2617 | /* See target.h. */ |
2618 | ||
2619 | target_ops * | |
2620 | target_ops::beneath () const | |
2621 | { | |
a1740ee1 | 2622 | return g_target_stack.find_beneath (this); |
b6a8c27b PA |
2623 | } |
2624 | ||
f6ac5f3d PA |
2625 | void |
2626 | target_ops::close () | |
2627 | { | |
2628 | } | |
2629 | ||
2630 | bool | |
2631 | target_ops::can_attach () | |
2632 | { | |
2633 | return 0; | |
2634 | } | |
2635 | ||
2636 | void | |
2637 | target_ops::attach (const char *, int) | |
2638 | { | |
2639 | gdb_assert_not_reached ("target_ops::attach called"); | |
2640 | } | |
2641 | ||
2642 | bool | |
2643 | target_ops::can_create_inferior () | |
2644 | { | |
2645 | return 0; | |
2646 | } | |
2647 | ||
2648 | void | |
2649 | target_ops::create_inferior (const char *, const std::string &, | |
2650 | char **, int) | |
2651 | { | |
2652 | gdb_assert_not_reached ("target_ops::create_inferior called"); | |
2653 | } | |
2654 | ||
57810aa7 | 2655 | bool |
f6ac5f3d PA |
2656 | target_ops::can_run () |
2657 | { | |
57810aa7 | 2658 | return false; |
f6ac5f3d PA |
2659 | } |
2660 | ||
2661 | int | |
2662 | target_can_run () | |
2663 | { | |
b6a8c27b | 2664 | for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
f6ac5f3d PA |
2665 | { |
2666 | if (t->can_run ()) | |
2667 | return 1; | |
2668 | } | |
2669 | ||
2670 | return 0; | |
2671 | } | |
7313baad UW |
2672 | |
2673 | /* Target file operations. */ | |
2674 | ||
2675 | static struct target_ops * | |
2676 | default_fileio_target (void) | |
2677 | { | |
f6ac5f3d PA |
2678 | struct target_ops *t; |
2679 | ||
7313baad UW |
2680 | /* If we're already connected to something that can perform |
2681 | file I/O, use it. Otherwise, try using the native target. */ | |
f6ac5f3d PA |
2682 | t = find_target_at (process_stratum); |
2683 | if (t != NULL) | |
2684 | return t; | |
2685 | return find_default_run_target ("file I/O"); | |
7313baad UW |
2686 | } |
2687 | ||
1c4b552b GB |
2688 | /* File handle for target file operations. */ |
2689 | ||
5ff79300 | 2690 | struct fileio_fh_t |
1c4b552b | 2691 | { |
20db9c52 PA |
2692 | /* The target on which this file is open. NULL if the target is |
2693 | meanwhile closed while the handle is open. */ | |
5ff79300 | 2694 | target_ops *target; |
1c4b552b GB |
2695 | |
2696 | /* The file descriptor on the target. */ | |
5ff79300 | 2697 | int target_fd; |
1c4b552b | 2698 | |
5ff79300 PA |
2699 | /* Check whether this fileio_fh_t represents a closed file. */ |
2700 | bool is_closed () | |
2701 | { | |
2702 | return target_fd < 0; | |
2703 | } | |
2704 | }; | |
1c4b552b GB |
2705 | |
2706 | /* Vector of currently open file handles. The value returned by | |
2707 | target_fileio_open and passed as the FD argument to other | |
2708 | target_fileio_* functions is an index into this vector. This | |
2709 | vector's entries are never freed; instead, files are marked as | |
2710 | closed, and the handle becomes available for reuse. */ | |
5ff79300 | 2711 | static std::vector<fileio_fh_t> fileio_fhandles; |
1c4b552b GB |
2712 | |
2713 | /* Index into fileio_fhandles of the lowest handle that might be | |
2714 | closed. This permits handle reuse without searching the whole | |
2715 | list each time a new file is opened. */ | |
2716 | static int lowest_closed_fd; | |
2717 | ||
20db9c52 PA |
2718 | /* Invalidate the target associated with open handles that were open |
2719 | on target TARG, since we're about to close (and maybe destroy) the | |
2720 | target. The handles remain open from the client's perspective, but | |
2721 | trying to do anything with them other than closing them will fail | |
2722 | with EIO. */ | |
2723 | ||
2724 | static void | |
2725 | fileio_handles_invalidate_target (target_ops *targ) | |
2726 | { | |
2727 | for (fileio_fh_t &fh : fileio_fhandles) | |
2728 | if (fh.target == targ) | |
2729 | fh.target = NULL; | |
2730 | } | |
2731 | ||
1c4b552b GB |
2732 | /* Acquire a target fileio file descriptor. */ |
2733 | ||
2734 | static int | |
5ff79300 | 2735 | acquire_fileio_fd (target_ops *target, int target_fd) |
1c4b552b | 2736 | { |
1c4b552b | 2737 | /* Search for closed handles to reuse. */ |
5ff79300 PA |
2738 | for (; lowest_closed_fd < fileio_fhandles.size (); lowest_closed_fd++) |
2739 | { | |
2740 | fileio_fh_t &fh = fileio_fhandles[lowest_closed_fd]; | |
2741 | ||
2742 | if (fh.is_closed ()) | |
2743 | break; | |
2744 | } | |
1c4b552b GB |
2745 | |
2746 | /* Push a new handle if no closed handles were found. */ | |
5ff79300 PA |
2747 | if (lowest_closed_fd == fileio_fhandles.size ()) |
2748 | fileio_fhandles.push_back (fileio_fh_t {target, target_fd}); | |
2749 | else | |
2750 | fileio_fhandles[lowest_closed_fd] = {target, target_fd}; | |
1c4b552b | 2751 | |
5ff79300 PA |
2752 | /* Should no longer be marked closed. */ |
2753 | gdb_assert (!fileio_fhandles[lowest_closed_fd].is_closed ()); | |
1c4b552b GB |
2754 | |
2755 | /* Return its index, and start the next lookup at | |
2756 | the next index. */ | |
2757 | return lowest_closed_fd++; | |
2758 | } | |
2759 | ||
2760 | /* Release a target fileio file descriptor. */ | |
2761 | ||
2762 | static void | |
2763 | release_fileio_fd (int fd, fileio_fh_t *fh) | |
2764 | { | |
5ff79300 | 2765 | fh->target_fd = -1; |
325fac50 | 2766 | lowest_closed_fd = std::min (lowest_closed_fd, fd); |
1c4b552b GB |
2767 | } |
2768 | ||
2769 | /* Return a pointer to the fileio_fhandle_t corresponding to FD. */ | |
2770 | ||
5ff79300 PA |
2771 | static fileio_fh_t * |
2772 | fileio_fd_to_fh (int fd) | |
2773 | { | |
2774 | return &fileio_fhandles[fd]; | |
2775 | } | |
1c4b552b | 2776 | |
f6ac5f3d PA |
2777 | |
2778 | /* Default implementations of file i/o methods. We don't want these | |
2779 | to delegate automatically, because we need to know which target | |
2780 | supported the method, in order to call it directly from within | |
2781 | pread/pwrite, etc. */ | |
2782 | ||
2783 | int | |
2784 | target_ops::fileio_open (struct inferior *inf, const char *filename, | |
2785 | int flags, int mode, int warn_if_slow, | |
2786 | int *target_errno) | |
2787 | { | |
2788 | *target_errno = FILEIO_ENOSYS; | |
2789 | return -1; | |
2790 | } | |
2791 | ||
2792 | int | |
2793 | target_ops::fileio_pwrite (int fd, const gdb_byte *write_buf, int len, | |
2794 | ULONGEST offset, int *target_errno) | |
2795 | { | |
2796 | *target_errno = FILEIO_ENOSYS; | |
2797 | return -1; | |
2798 | } | |
2799 | ||
2800 | int | |
2801 | target_ops::fileio_pread (int fd, gdb_byte *read_buf, int len, | |
2802 | ULONGEST offset, int *target_errno) | |
2803 | { | |
2804 | *target_errno = FILEIO_ENOSYS; | |
2805 | return -1; | |
2806 | } | |
2807 | ||
2808 | int | |
2809 | target_ops::fileio_fstat (int fd, struct stat *sb, int *target_errno) | |
2810 | { | |
2811 | *target_errno = FILEIO_ENOSYS; | |
2812 | return -1; | |
2813 | } | |
2814 | ||
2815 | int | |
2816 | target_ops::fileio_close (int fd, int *target_errno) | |
2817 | { | |
2818 | *target_errno = FILEIO_ENOSYS; | |
2819 | return -1; | |
2820 | } | |
2821 | ||
2822 | int | |
2823 | target_ops::fileio_unlink (struct inferior *inf, const char *filename, | |
2824 | int *target_errno) | |
2825 | { | |
2826 | *target_errno = FILEIO_ENOSYS; | |
2827 | return -1; | |
2828 | } | |
2829 | ||
2830 | gdb::optional<std::string> | |
2831 | target_ops::fileio_readlink (struct inferior *inf, const char *filename, | |
2832 | int *target_errno) | |
2833 | { | |
2834 | *target_errno = FILEIO_ENOSYS; | |
2835 | return {}; | |
2836 | } | |
2837 | ||
4313b8c0 GB |
2838 | /* Helper for target_fileio_open and |
2839 | target_fileio_open_warn_if_slow. */ | |
12e2a5fd | 2840 | |
4313b8c0 GB |
2841 | static int |
2842 | target_fileio_open_1 (struct inferior *inf, const char *filename, | |
2843 | int flags, int mode, int warn_if_slow, | |
2844 | int *target_errno) | |
7313baad | 2845 | { |
b6a8c27b | 2846 | for (target_ops *t = default_fileio_target (); t != NULL; t = t->beneath ()) |
7313baad | 2847 | { |
f6ac5f3d PA |
2848 | int fd = t->fileio_open (inf, filename, flags, mode, |
2849 | warn_if_slow, target_errno); | |
7313baad | 2850 | |
f6ac5f3d PA |
2851 | if (fd == -1 && *target_errno == FILEIO_ENOSYS) |
2852 | continue; | |
1c4b552b | 2853 | |
f6ac5f3d PA |
2854 | if (fd < 0) |
2855 | fd = -1; | |
2856 | else | |
2857 | fd = acquire_fileio_fd (t, fd); | |
2858 | ||
2859 | if (targetdebug) | |
2860 | fprintf_unfiltered (gdb_stdlog, | |
4313b8c0 | 2861 | "target_fileio_open (%d,%s,0x%x,0%o,%d)" |
07c138c8 GB |
2862 | " = %d (%d)\n", |
2863 | inf == NULL ? 0 : inf->num, | |
7313baad | 2864 | filename, flags, mode, |
4313b8c0 GB |
2865 | warn_if_slow, fd, |
2866 | fd != -1 ? 0 : *target_errno); | |
f6ac5f3d | 2867 | return fd; |
7313baad UW |
2868 | } |
2869 | ||
2870 | *target_errno = FILEIO_ENOSYS; | |
2871 | return -1; | |
2872 | } | |
2873 | ||
12e2a5fd GB |
2874 | /* See target.h. */ |
2875 | ||
4313b8c0 GB |
2876 | int |
2877 | target_fileio_open (struct inferior *inf, const char *filename, | |
2878 | int flags, int mode, int *target_errno) | |
2879 | { | |
2880 | return target_fileio_open_1 (inf, filename, flags, mode, 0, | |
2881 | target_errno); | |
2882 | } | |
2883 | ||
2884 | /* See target.h. */ | |
2885 | ||
2886 | int | |
2887 | target_fileio_open_warn_if_slow (struct inferior *inf, | |
2888 | const char *filename, | |
2889 | int flags, int mode, int *target_errno) | |
2890 | { | |
2891 | return target_fileio_open_1 (inf, filename, flags, mode, 1, | |
2892 | target_errno); | |
2893 | } | |
2894 | ||
2895 | /* See target.h. */ | |
2896 | ||
7313baad UW |
2897 | int |
2898 | target_fileio_pwrite (int fd, const gdb_byte *write_buf, int len, | |
2899 | ULONGEST offset, int *target_errno) | |
2900 | { | |
1c4b552b GB |
2901 | fileio_fh_t *fh = fileio_fd_to_fh (fd); |
2902 | int ret = -1; | |
7313baad | 2903 | |
5ff79300 | 2904 | if (fh->is_closed ()) |
1c4b552b | 2905 | *target_errno = EBADF; |
20db9c52 PA |
2906 | else if (fh->target == NULL) |
2907 | *target_errno = EIO; | |
1c4b552b | 2908 | else |
f6ac5f3d PA |
2909 | ret = fh->target->fileio_pwrite (fh->target_fd, write_buf, |
2910 | len, offset, target_errno); | |
7313baad | 2911 | |
1c4b552b GB |
2912 | if (targetdebug) |
2913 | fprintf_unfiltered (gdb_stdlog, | |
2914 | "target_fileio_pwrite (%d,...,%d,%s) " | |
2915 | "= %d (%d)\n", | |
2916 | fd, len, pulongest (offset), | |
2917 | ret, ret != -1 ? 0 : *target_errno); | |
2918 | return ret; | |
7313baad UW |
2919 | } |
2920 | ||
12e2a5fd GB |
2921 | /* See target.h. */ |
2922 | ||
7313baad UW |
2923 | int |
2924 | target_fileio_pread (int fd, gdb_byte *read_buf, int len, | |
2925 | ULONGEST offset, int *target_errno) | |
2926 | { | |
1c4b552b GB |
2927 | fileio_fh_t *fh = fileio_fd_to_fh (fd); |
2928 | int ret = -1; | |
7313baad | 2929 | |
5ff79300 | 2930 | if (fh->is_closed ()) |
1c4b552b | 2931 | *target_errno = EBADF; |
20db9c52 PA |
2932 | else if (fh->target == NULL) |
2933 | *target_errno = EIO; | |
1c4b552b | 2934 | else |
f6ac5f3d PA |
2935 | ret = fh->target->fileio_pread (fh->target_fd, read_buf, |
2936 | len, offset, target_errno); | |
7313baad | 2937 | |
1c4b552b GB |
2938 | if (targetdebug) |
2939 | fprintf_unfiltered (gdb_stdlog, | |
2940 | "target_fileio_pread (%d,...,%d,%s) " | |
2941 | "= %d (%d)\n", | |
2942 | fd, len, pulongest (offset), | |
2943 | ret, ret != -1 ? 0 : *target_errno); | |
9b15c1f0 GB |
2944 | return ret; |
2945 | } | |
2946 | ||
2947 | /* See target.h. */ | |
12e2a5fd | 2948 | |
9b15c1f0 GB |
2949 | int |
2950 | target_fileio_fstat (int fd, struct stat *sb, int *target_errno) | |
2951 | { | |
2952 | fileio_fh_t *fh = fileio_fd_to_fh (fd); | |
2953 | int ret = -1; | |
2954 | ||
5ff79300 | 2955 | if (fh->is_closed ()) |
9b15c1f0 | 2956 | *target_errno = EBADF; |
20db9c52 PA |
2957 | else if (fh->target == NULL) |
2958 | *target_errno = EIO; | |
9b15c1f0 | 2959 | else |
f6ac5f3d | 2960 | ret = fh->target->fileio_fstat (fh->target_fd, sb, target_errno); |
9b15c1f0 GB |
2961 | |
2962 | if (targetdebug) | |
2963 | fprintf_unfiltered (gdb_stdlog, | |
2964 | "target_fileio_fstat (%d) = %d (%d)\n", | |
2965 | fd, ret, ret != -1 ? 0 : *target_errno); | |
1c4b552b | 2966 | return ret; |
7313baad UW |
2967 | } |
2968 | ||
12e2a5fd GB |
2969 | /* See target.h. */ |
2970 | ||
7313baad UW |
2971 | int |
2972 | target_fileio_close (int fd, int *target_errno) | |
2973 | { | |
1c4b552b GB |
2974 | fileio_fh_t *fh = fileio_fd_to_fh (fd); |
2975 | int ret = -1; | |
7313baad | 2976 | |
5ff79300 | 2977 | if (fh->is_closed ()) |
1c4b552b GB |
2978 | *target_errno = EBADF; |
2979 | else | |
7313baad | 2980 | { |
20db9c52 | 2981 | if (fh->target != NULL) |
f6ac5f3d PA |
2982 | ret = fh->target->fileio_close (fh->target_fd, |
2983 | target_errno); | |
20db9c52 PA |
2984 | else |
2985 | ret = 0; | |
1c4b552b | 2986 | release_fileio_fd (fd, fh); |
7313baad UW |
2987 | } |
2988 | ||
1c4b552b GB |
2989 | if (targetdebug) |
2990 | fprintf_unfiltered (gdb_stdlog, | |
2991 | "target_fileio_close (%d) = %d (%d)\n", | |
2992 | fd, ret, ret != -1 ? 0 : *target_errno); | |
2993 | return ret; | |
7313baad UW |
2994 | } |
2995 | ||
12e2a5fd GB |
2996 | /* See target.h. */ |
2997 | ||
7313baad | 2998 | int |
07c138c8 GB |
2999 | target_fileio_unlink (struct inferior *inf, const char *filename, |
3000 | int *target_errno) | |
7313baad | 3001 | { |
b6a8c27b | 3002 | for (target_ops *t = default_fileio_target (); t != NULL; t = t->beneath ()) |
7313baad | 3003 | { |
f6ac5f3d | 3004 | int ret = t->fileio_unlink (inf, filename, target_errno); |
7313baad | 3005 | |
f6ac5f3d PA |
3006 | if (ret == -1 && *target_errno == FILEIO_ENOSYS) |
3007 | continue; | |
3008 | ||
3009 | if (targetdebug) | |
3010 | fprintf_unfiltered (gdb_stdlog, | |
3011 | "target_fileio_unlink (%d,%s)" | |
3012 | " = %d (%d)\n", | |
3013 | inf == NULL ? 0 : inf->num, filename, | |
3014 | ret, ret != -1 ? 0 : *target_errno); | |
3015 | return ret; | |
7313baad UW |
3016 | } |
3017 | ||
3018 | *target_errno = FILEIO_ENOSYS; | |
3019 | return -1; | |
3020 | } | |
3021 | ||
12e2a5fd GB |
3022 | /* See target.h. */ |
3023 | ||
e0d3522b | 3024 | gdb::optional<std::string> |
07c138c8 GB |
3025 | target_fileio_readlink (struct inferior *inf, const char *filename, |
3026 | int *target_errno) | |
b9e7b9c3 | 3027 | { |
b6a8c27b | 3028 | for (target_ops *t = default_fileio_target (); t != NULL; t = t->beneath ()) |
b9e7b9c3 | 3029 | { |
f6ac5f3d PA |
3030 | gdb::optional<std::string> ret |
3031 | = t->fileio_readlink (inf, filename, target_errno); | |
b9e7b9c3 | 3032 | |
f6ac5f3d PA |
3033 | if (!ret.has_value () && *target_errno == FILEIO_ENOSYS) |
3034 | continue; | |
3035 | ||
3036 | if (targetdebug) | |
3037 | fprintf_unfiltered (gdb_stdlog, | |
3038 | "target_fileio_readlink (%d,%s)" | |
3039 | " = %s (%d)\n", | |
3040 | inf == NULL ? 0 : inf->num, | |
3041 | filename, ret ? ret->c_str () : "(nil)", | |
3042 | ret ? 0 : *target_errno); | |
3043 | return ret; | |
b9e7b9c3 UW |
3044 | } |
3045 | ||
3046 | *target_errno = FILEIO_ENOSYS; | |
e0d3522b | 3047 | return {}; |
b9e7b9c3 UW |
3048 | } |
3049 | ||
770623f7 TT |
3050 | /* Like scoped_fd, but specific to target fileio. */ |
3051 | ||
3052 | class scoped_target_fd | |
7313baad | 3053 | { |
770623f7 TT |
3054 | public: |
3055 | explicit scoped_target_fd (int fd) noexcept | |
3056 | : m_fd (fd) | |
3057 | { | |
3058 | } | |
7313baad | 3059 | |
770623f7 TT |
3060 | ~scoped_target_fd () |
3061 | { | |
3062 | if (m_fd >= 0) | |
3063 | { | |
3064 | int target_errno; | |
3065 | ||
3066 | target_fileio_close (m_fd, &target_errno); | |
3067 | } | |
3068 | } | |
3069 | ||
3070 | DISABLE_COPY_AND_ASSIGN (scoped_target_fd); | |
3071 | ||
3072 | int get () const noexcept | |
3073 | { | |
3074 | return m_fd; | |
3075 | } | |
3076 | ||
3077 | private: | |
3078 | int m_fd; | |
3079 | }; | |
7313baad | 3080 | |
07c138c8 GB |
3081 | /* Read target file FILENAME, in the filesystem as seen by INF. If |
3082 | INF is NULL, use the filesystem seen by the debugger (GDB or, for | |
3083 | remote targets, the remote stub). Store the result in *BUF_P and | |
3084 | return the size of the transferred data. PADDING additional bytes | |
3085 | are available in *BUF_P. This is a helper function for | |
3086 | target_fileio_read_alloc; see the declaration of that function for | |
3087 | more information. */ | |
7313baad | 3088 | |
f7af1fcd JK |
3089 | static LONGEST |
3090 | target_fileio_read_alloc_1 (struct inferior *inf, const char *filename, | |
3091 | gdb_byte **buf_p, int padding) | |
3092 | { | |
db1ff28b JK |
3093 | size_t buf_alloc, buf_pos; |
3094 | gdb_byte *buf; | |
3095 | LONGEST n; | |
db1ff28b | 3096 | int target_errno; |
f7af1fcd | 3097 | |
770623f7 TT |
3098 | scoped_target_fd fd (target_fileio_open (inf, filename, FILEIO_O_RDONLY, |
3099 | 0700, &target_errno)); | |
3100 | if (fd.get () == -1) | |
f7af1fcd JK |
3101 | return -1; |
3102 | ||
db1ff28b JK |
3103 | /* Start by reading up to 4K at a time. The target will throttle |
3104 | this number down if necessary. */ | |
3105 | buf_alloc = 4096; | |
224c3ddb | 3106 | buf = (gdb_byte *) xmalloc (buf_alloc); |
db1ff28b JK |
3107 | buf_pos = 0; |
3108 | while (1) | |
3109 | { | |
770623f7 | 3110 | n = target_fileio_pread (fd.get (), &buf[buf_pos], |
db1ff28b JK |
3111 | buf_alloc - buf_pos - padding, buf_pos, |
3112 | &target_errno); | |
3113 | if (n < 0) | |
3114 | { | |
3115 | /* An error occurred. */ | |
db1ff28b JK |
3116 | xfree (buf); |
3117 | return -1; | |
3118 | } | |
3119 | else if (n == 0) | |
3120 | { | |
3121 | /* Read all there was. */ | |
db1ff28b JK |
3122 | if (buf_pos == 0) |
3123 | xfree (buf); | |
3124 | else | |
3125 | *buf_p = buf; | |
3126 | return buf_pos; | |
3127 | } | |
3128 | ||
3129 | buf_pos += n; | |
3130 | ||
3131 | /* If the buffer is filling up, expand it. */ | |
3132 | if (buf_alloc < buf_pos * 2) | |
3133 | { | |
3134 | buf_alloc *= 2; | |
224c3ddb | 3135 | buf = (gdb_byte *) xrealloc (buf, buf_alloc); |
db1ff28b JK |
3136 | } |
3137 | ||
3138 | QUIT; | |
3139 | } | |
f7af1fcd JK |
3140 | } |
3141 | ||
12e2a5fd | 3142 | /* See target.h. */ |
7313baad UW |
3143 | |
3144 | LONGEST | |
07c138c8 GB |
3145 | target_fileio_read_alloc (struct inferior *inf, const char *filename, |
3146 | gdb_byte **buf_p) | |
7313baad | 3147 | { |
07c138c8 | 3148 | return target_fileio_read_alloc_1 (inf, filename, buf_p, 0); |
7313baad UW |
3149 | } |
3150 | ||
db1ff28b | 3151 | /* See target.h. */ |
f7af1fcd | 3152 | |
87028b87 | 3153 | gdb::unique_xmalloc_ptr<char> |
f7af1fcd JK |
3154 | target_fileio_read_stralloc (struct inferior *inf, const char *filename) |
3155 | { | |
db1ff28b JK |
3156 | gdb_byte *buffer; |
3157 | char *bufstr; | |
3158 | LONGEST i, transferred; | |
3159 | ||
3160 | transferred = target_fileio_read_alloc_1 (inf, filename, &buffer, 1); | |
3161 | bufstr = (char *) buffer; | |
3162 | ||
3163 | if (transferred < 0) | |
87028b87 | 3164 | return gdb::unique_xmalloc_ptr<char> (nullptr); |
db1ff28b JK |
3165 | |
3166 | if (transferred == 0) | |
87028b87 | 3167 | return gdb::unique_xmalloc_ptr<char> (xstrdup ("")); |
db1ff28b JK |
3168 | |
3169 | bufstr[transferred] = 0; | |
3170 | ||
3171 | /* Check for embedded NUL bytes; but allow trailing NULs. */ | |
3172 | for (i = strlen (bufstr); i < transferred; i++) | |
3173 | if (bufstr[i] != 0) | |
3174 | { | |
3175 | warning (_("target file %s " | |
3176 | "contained unexpected null characters"), | |
3177 | filename); | |
3178 | break; | |
3179 | } | |
3180 | ||
87028b87 | 3181 | return gdb::unique_xmalloc_ptr<char> (bufstr); |
f7af1fcd | 3182 | } |
7313baad | 3183 | |
db1ff28b | 3184 | |
e0d24f8d | 3185 | static int |
31568a15 TT |
3186 | default_region_ok_for_hw_watchpoint (struct target_ops *self, |
3187 | CORE_ADDR addr, int len) | |
e0d24f8d | 3188 | { |
f5656ead | 3189 | return (len <= gdbarch_ptr_bit (target_gdbarch ()) / TARGET_CHAR_BIT); |
ccaa32c7 GS |
3190 | } |
3191 | ||
5009afc5 AS |
3192 | static int |
3193 | default_watchpoint_addr_within_range (struct target_ops *target, | |
3194 | CORE_ADDR addr, | |
3195 | CORE_ADDR start, int length) | |
3196 | { | |
3197 | return addr >= start && addr < start + length; | |
3198 | } | |
3199 | ||
c2250ad1 UW |
3200 | static struct gdbarch * |
3201 | default_thread_architecture (struct target_ops *ops, ptid_t ptid) | |
3202 | { | |
5cd63fda PA |
3203 | inferior *inf = find_inferior_ptid (ptid); |
3204 | gdb_assert (inf != NULL); | |
3205 | return inf->gdbarch; | |
c2250ad1 UW |
3206 | } |
3207 | ||
8b06beed TT |
3208 | /* See target.h. */ |
3209 | ||
a1740ee1 PA |
3210 | target_ops * |
3211 | target_stack::find_beneath (const target_ops *t) const | |
8b06beed | 3212 | { |
a1740ee1 PA |
3213 | /* Look for a non-empty slot at stratum levels beneath T's. */ |
3214 | for (int stratum = t->to_stratum - 1; stratum >= 0; --stratum) | |
3215 | if (m_stack[stratum] != NULL) | |
3216 | return m_stack[stratum]; | |
8b06beed TT |
3217 | |
3218 | return NULL; | |
3219 | } | |
3220 | ||
a1740ee1 PA |
3221 | /* See target.h. */ |
3222 | ||
3223 | struct target_ops * | |
3224 | find_target_at (enum strata stratum) | |
3225 | { | |
3226 | return g_target_stack.at (stratum); | |
3227 | } | |
3228 | ||
c906108c | 3229 | \f |
0f48b757 PA |
3230 | |
3231 | /* See target.h */ | |
3232 | ||
3233 | void | |
3234 | target_announce_detach (int from_tty) | |
3235 | { | |
3236 | pid_t pid; | |
a121b7c1 | 3237 | const char *exec_file; |
0f48b757 PA |
3238 | |
3239 | if (!from_tty) | |
3240 | return; | |
3241 | ||
3242 | exec_file = get_exec_file (0); | |
3243 | if (exec_file == NULL) | |
3244 | exec_file = ""; | |
3245 | ||
e99b03dc | 3246 | pid = inferior_ptid.pid (); |
0f48b757 | 3247 | printf_unfiltered (_("Detaching from program: %s, %s\n"), exec_file, |
f2907e49 | 3248 | target_pid_to_str (ptid_t (pid))); |
0f48b757 PA |
3249 | gdb_flush (gdb_stdout); |
3250 | } | |
3251 | ||
c906108c SS |
3252 | /* The inferior process has died. Long live the inferior! */ |
3253 | ||
3254 | void | |
fba45db2 | 3255 | generic_mourn_inferior (void) |
c906108c | 3256 | { |
00431a78 | 3257 | inferior *inf = current_inferior (); |
c906108c | 3258 | |
39f77062 | 3259 | inferior_ptid = null_ptid; |
7f9f62ba | 3260 | |
f59f708a PA |
3261 | /* Mark breakpoints uninserted in case something tries to delete a |
3262 | breakpoint while we delete the inferior's threads (which would | |
3263 | fail, since the inferior is long gone). */ | |
3264 | mark_breakpoints_out (); | |
3265 | ||
00431a78 PA |
3266 | if (inf->pid != 0) |
3267 | exit_inferior (inf); | |
7f9f62ba | 3268 | |
f59f708a PA |
3269 | /* Note this wipes step-resume breakpoints, so needs to be done |
3270 | after exit_inferior, which ends up referencing the step-resume | |
3271 | breakpoints through clear_thread_inferior_resources. */ | |
c906108c | 3272 | breakpoint_init_inferior (inf_exited); |
f59f708a | 3273 | |
c906108c SS |
3274 | registers_changed (); |
3275 | ||
c906108c SS |
3276 | reopen_exec_file (); |
3277 | reinit_frame_cache (); | |
3278 | ||
9a4105ab AC |
3279 | if (deprecated_detach_hook) |
3280 | deprecated_detach_hook (); | |
c906108c SS |
3281 | } |
3282 | \f | |
fd0a2a6f MK |
3283 | /* Convert a normal process ID to a string. Returns the string in a |
3284 | static buffer. */ | |
c906108c | 3285 | |
7a114964 | 3286 | const char * |
39f77062 | 3287 | normal_pid_to_str (ptid_t ptid) |
c906108c | 3288 | { |
fd0a2a6f | 3289 | static char buf[32]; |
c906108c | 3290 | |
e99b03dc | 3291 | xsnprintf (buf, sizeof buf, "process %d", ptid.pid ()); |
c906108c SS |
3292 | return buf; |
3293 | } | |
3294 | ||
7a114964 | 3295 | static const char * |
770234d3 | 3296 | default_pid_to_str (struct target_ops *ops, ptid_t ptid) |
117de6a9 PA |
3297 | { |
3298 | return normal_pid_to_str (ptid); | |
3299 | } | |
3300 | ||
9b4eba8e HZ |
3301 | /* Error-catcher for target_find_memory_regions. */ |
3302 | static int | |
2e73927c TT |
3303 | dummy_find_memory_regions (struct target_ops *self, |
3304 | find_memory_region_ftype ignore1, void *ignore2) | |
be4d1333 | 3305 | { |
9b4eba8e | 3306 | error (_("Command not implemented for this target.")); |
be4d1333 MS |
3307 | return 0; |
3308 | } | |
3309 | ||
9b4eba8e HZ |
3310 | /* Error-catcher for target_make_corefile_notes. */ |
3311 | static char * | |
fc6691b2 TT |
3312 | dummy_make_corefile_notes (struct target_ops *self, |
3313 | bfd *ignore1, int *ignore2) | |
be4d1333 | 3314 | { |
9b4eba8e | 3315 | error (_("Command not implemented for this target.")); |
be4d1333 MS |
3316 | return NULL; |
3317 | } | |
3318 | ||
f6ac5f3d PA |
3319 | #include "target-delegates.c" |
3320 | ||
c906108c | 3321 | |
d9f719f1 PA |
3322 | static const target_info dummy_target_info = { |
3323 | "None", | |
3324 | N_("None"), | |
3325 | "" | |
3326 | }; | |
3327 | ||
f6ac5f3d PA |
3328 | dummy_target::dummy_target () |
3329 | { | |
3330 | to_stratum = dummy_stratum; | |
3331 | } | |
3332 | ||
f6ac5f3d PA |
3333 | debug_target::debug_target () |
3334 | { | |
3335 | to_stratum = debug_stratum; | |
3336 | } | |
3337 | ||
d9f719f1 PA |
3338 | const target_info & |
3339 | dummy_target::info () const | |
f6ac5f3d | 3340 | { |
d9f719f1 | 3341 | return dummy_target_info; |
f6ac5f3d PA |
3342 | } |
3343 | ||
d9f719f1 PA |
3344 | const target_info & |
3345 | debug_target::info () const | |
f6ac5f3d | 3346 | { |
b6a8c27b | 3347 | return beneath ()->info (); |
f6ac5f3d PA |
3348 | } |
3349 | ||
c906108c | 3350 | \f |
c906108c | 3351 | |
f1c07ab0 | 3352 | void |
460014f5 | 3353 | target_close (struct target_ops *targ) |
f1c07ab0 | 3354 | { |
7fdc1521 TT |
3355 | gdb_assert (!target_is_pushed (targ)); |
3356 | ||
20db9c52 PA |
3357 | fileio_handles_invalidate_target (targ); |
3358 | ||
f6ac5f3d | 3359 | targ->close (); |
947b8855 PA |
3360 | |
3361 | if (targetdebug) | |
460014f5 | 3362 | fprintf_unfiltered (gdb_stdlog, "target_close ()\n"); |
f1c07ab0 AC |
3363 | } |
3364 | ||
28439f5e PA |
3365 | int |
3366 | target_thread_alive (ptid_t ptid) | |
c906108c | 3367 | { |
8b88a78e | 3368 | return current_top_target ()->thread_alive (ptid); |
28439f5e PA |
3369 | } |
3370 | ||
3371 | void | |
e8032dde | 3372 | target_update_thread_list (void) |
28439f5e | 3373 | { |
8b88a78e | 3374 | current_top_target ()->update_thread_list (); |
c906108c SS |
3375 | } |
3376 | ||
d914c394 SS |
3377 | void |
3378 | target_stop (ptid_t ptid) | |
3379 | { | |
3380 | if (!may_stop) | |
3381 | { | |
3382 | warning (_("May not interrupt or stop the target, ignoring attempt")); | |
3383 | return; | |
3384 | } | |
3385 | ||
8b88a78e | 3386 | current_top_target ()->stop (ptid); |
d914c394 SS |
3387 | } |
3388 | ||
bfedc46a | 3389 | void |
e671cd59 | 3390 | target_interrupt () |
bfedc46a PA |
3391 | { |
3392 | if (!may_stop) | |
3393 | { | |
3394 | warning (_("May not interrupt or stop the target, ignoring attempt")); | |
3395 | return; | |
3396 | } | |
3397 | ||
8b88a78e | 3398 | current_top_target ()->interrupt (); |
bfedc46a PA |
3399 | } |
3400 | ||
abc56d60 PA |
3401 | /* See target.h. */ |
3402 | ||
93692b58 PA |
3403 | void |
3404 | target_pass_ctrlc (void) | |
3405 | { | |
8b88a78e | 3406 | current_top_target ()->pass_ctrlc (); |
93692b58 PA |
3407 | } |
3408 | ||
3409 | /* See target.h. */ | |
3410 | ||
3411 | void | |
3412 | default_target_pass_ctrlc (struct target_ops *ops) | |
3413 | { | |
e671cd59 | 3414 | target_interrupt (); |
93692b58 PA |
3415 | } |
3416 | ||
f8c1d06b GB |
3417 | /* See target/target.h. */ |
3418 | ||
3419 | void | |
03f4463b | 3420 | target_stop_and_wait (ptid_t ptid) |
f8c1d06b GB |
3421 | { |
3422 | struct target_waitstatus status; | |
3423 | int was_non_stop = non_stop; | |
3424 | ||
3425 | non_stop = 1; | |
3426 | target_stop (ptid); | |
3427 | ||
3428 | memset (&status, 0, sizeof (status)); | |
3429 | target_wait (ptid, &status, 0); | |
3430 | ||
3431 | non_stop = was_non_stop; | |
3432 | } | |
3433 | ||
3434 | /* See target/target.h. */ | |
3435 | ||
3436 | void | |
03f4463b | 3437 | target_continue_no_signal (ptid_t ptid) |
f8c1d06b GB |
3438 | { |
3439 | target_resume (ptid, 0, GDB_SIGNAL_0); | |
3440 | } | |
3441 | ||
049a8570 SDJ |
3442 | /* See target/target.h. */ |
3443 | ||
3444 | void | |
3445 | target_continue (ptid_t ptid, enum gdb_signal signal) | |
3446 | { | |
3447 | target_resume (ptid, 0, signal); | |
3448 | } | |
3449 | ||
fdbac7d8 | 3450 | /* Concatenate ELEM to LIST, a comma-separated list. */ |
09826ec5 | 3451 | |
09ce46f2 SM |
3452 | static void |
3453 | str_comma_list_concat_elem (std::string *list, const char *elem) | |
09826ec5 | 3454 | { |
09ce46f2 SM |
3455 | if (!list->empty ()) |
3456 | list->append (", "); | |
3457 | ||
3458 | list->append (elem); | |
09826ec5 PA |
3459 | } |
3460 | ||
3461 | /* Helper for target_options_to_string. If OPT is present in | |
3462 | TARGET_OPTIONS, append the OPT_STR (string version of OPT) in RET. | |
09ce46f2 | 3463 | OPT is removed from TARGET_OPTIONS. */ |
09826ec5 | 3464 | |
09ce46f2 SM |
3465 | static void |
3466 | do_option (int *target_options, std::string *ret, | |
a121b7c1 | 3467 | int opt, const char *opt_str) |
09826ec5 PA |
3468 | { |
3469 | if ((*target_options & opt) != 0) | |
3470 | { | |
09ce46f2 | 3471 | str_comma_list_concat_elem (ret, opt_str); |
09826ec5 PA |
3472 | *target_options &= ~opt; |
3473 | } | |
09826ec5 PA |
3474 | } |
3475 | ||
fdbac7d8 SM |
3476 | /* See target.h. */ |
3477 | ||
09ce46f2 | 3478 | std::string |
09826ec5 PA |
3479 | target_options_to_string (int target_options) |
3480 | { | |
09ce46f2 | 3481 | std::string ret; |
09826ec5 PA |
3482 | |
3483 | #define DO_TARG_OPTION(OPT) \ | |
09ce46f2 | 3484 | do_option (&target_options, &ret, OPT, #OPT) |
09826ec5 PA |
3485 | |
3486 | DO_TARG_OPTION (TARGET_WNOHANG); | |
3487 | ||
3488 | if (target_options != 0) | |
09ce46f2 | 3489 | str_comma_list_concat_elem (&ret, "unknown???"); |
09826ec5 | 3490 | |
09826ec5 PA |
3491 | return ret; |
3492 | } | |
3493 | ||
28439f5e PA |
3494 | void |
3495 | target_fetch_registers (struct regcache *regcache, int regno) | |
c906108c | 3496 | { |
8b88a78e | 3497 | current_top_target ()->fetch_registers (regcache, regno); |
ad5989bd | 3498 | if (targetdebug) |
ef79d9a3 | 3499 | regcache->debug_print_register ("target_fetch_registers", regno); |
c906108c SS |
3500 | } |
3501 | ||
28439f5e PA |
3502 | void |
3503 | target_store_registers (struct regcache *regcache, int regno) | |
c906108c | 3504 | { |
d914c394 SS |
3505 | if (!may_write_registers) |
3506 | error (_("Writing to registers is not allowed (regno %d)"), regno); | |
3507 | ||
8b88a78e | 3508 | current_top_target ()->store_registers (regcache, regno); |
6b84065d | 3509 | if (targetdebug) |
28439f5e | 3510 | { |
ef79d9a3 | 3511 | regcache->debug_print_register ("target_store_registers", regno); |
28439f5e | 3512 | } |
c906108c SS |
3513 | } |
3514 | ||
dc146f7c VP |
3515 | int |
3516 | target_core_of_thread (ptid_t ptid) | |
3517 | { | |
8b88a78e | 3518 | return current_top_target ()->core_of_thread (ptid); |
dc146f7c VP |
3519 | } |
3520 | ||
936d2992 PA |
3521 | int |
3522 | simple_verify_memory (struct target_ops *ops, | |
3523 | const gdb_byte *data, CORE_ADDR lma, ULONGEST size) | |
3524 | { | |
3525 | LONGEST total_xfered = 0; | |
3526 | ||
3527 | while (total_xfered < size) | |
3528 | { | |
3529 | ULONGEST xfered_len; | |
3530 | enum target_xfer_status status; | |
3531 | gdb_byte buf[1024]; | |
768adc05 | 3532 | ULONGEST howmuch = std::min<ULONGEST> (sizeof (buf), size - total_xfered); |
936d2992 PA |
3533 | |
3534 | status = target_xfer_partial (ops, TARGET_OBJECT_MEMORY, NULL, | |
3535 | buf, NULL, lma + total_xfered, howmuch, | |
3536 | &xfered_len); | |
3537 | if (status == TARGET_XFER_OK | |
3538 | && memcmp (data + total_xfered, buf, xfered_len) == 0) | |
3539 | { | |
3540 | total_xfered += xfered_len; | |
3541 | QUIT; | |
3542 | } | |
3543 | else | |
3544 | return 0; | |
3545 | } | |
3546 | return 1; | |
3547 | } | |
3548 | ||
3549 | /* Default implementation of memory verification. */ | |
3550 | ||
3551 | static int | |
3552 | default_verify_memory (struct target_ops *self, | |
3553 | const gdb_byte *data, CORE_ADDR memaddr, ULONGEST size) | |
3554 | { | |
3555 | /* Start over from the top of the target stack. */ | |
8b88a78e | 3556 | return simple_verify_memory (current_top_target (), |
936d2992 PA |
3557 | data, memaddr, size); |
3558 | } | |
3559 | ||
4a5e7a5b PA |
3560 | int |
3561 | target_verify_memory (const gdb_byte *data, CORE_ADDR memaddr, ULONGEST size) | |
3562 | { | |
8b88a78e | 3563 | return current_top_target ()->verify_memory (data, memaddr, size); |
4a5e7a5b PA |
3564 | } |
3565 | ||
9c06b0b4 TJB |
3566 | /* The documentation for this function is in its prototype declaration in |
3567 | target.h. */ | |
3568 | ||
3569 | int | |
f4b0a671 SM |
3570 | target_insert_mask_watchpoint (CORE_ADDR addr, CORE_ADDR mask, |
3571 | enum target_hw_bp_type rw) | |
9c06b0b4 | 3572 | { |
8b88a78e | 3573 | return current_top_target ()->insert_mask_watchpoint (addr, mask, rw); |
9c06b0b4 TJB |
3574 | } |
3575 | ||
3576 | /* The documentation for this function is in its prototype declaration in | |
3577 | target.h. */ | |
3578 | ||
3579 | int | |
f4b0a671 SM |
3580 | target_remove_mask_watchpoint (CORE_ADDR addr, CORE_ADDR mask, |
3581 | enum target_hw_bp_type rw) | |
9c06b0b4 | 3582 | { |
8b88a78e | 3583 | return current_top_target ()->remove_mask_watchpoint (addr, mask, rw); |
9c06b0b4 TJB |
3584 | } |
3585 | ||
3586 | /* The documentation for this function is in its prototype declaration | |
3587 | in target.h. */ | |
3588 | ||
3589 | int | |
3590 | target_masked_watch_num_registers (CORE_ADDR addr, CORE_ADDR mask) | |
3591 | { | |
8b88a78e | 3592 | return current_top_target ()->masked_watch_num_registers (addr, mask); |
9c06b0b4 TJB |
3593 | } |
3594 | ||
f1310107 TJB |
3595 | /* The documentation for this function is in its prototype declaration |
3596 | in target.h. */ | |
3597 | ||
3598 | int | |
3599 | target_ranged_break_num_registers (void) | |
3600 | { | |
8b88a78e | 3601 | return current_top_target ()->ranged_break_num_registers (); |
f1310107 TJB |
3602 | } |
3603 | ||
02d27625 MM |
3604 | /* See target.h. */ |
3605 | ||
02d27625 | 3606 | struct btrace_target_info * |
f4abbc16 | 3607 | target_enable_btrace (ptid_t ptid, const struct btrace_config *conf) |
02d27625 | 3608 | { |
8b88a78e | 3609 | return current_top_target ()->enable_btrace (ptid, conf); |
02d27625 MM |
3610 | } |
3611 | ||
3612 | /* See target.h. */ | |
3613 | ||
3614 | void | |
3615 | target_disable_btrace (struct btrace_target_info *btinfo) | |
3616 | { | |
8b88a78e | 3617 | current_top_target ()->disable_btrace (btinfo); |
02d27625 MM |
3618 | } |
3619 | ||
3620 | /* See target.h. */ | |
3621 | ||
3622 | void | |
3623 | target_teardown_btrace (struct btrace_target_info *btinfo) | |
3624 | { | |
8b88a78e | 3625 | current_top_target ()->teardown_btrace (btinfo); |
02d27625 MM |
3626 | } |
3627 | ||
3628 | /* See target.h. */ | |
3629 | ||
969c39fb | 3630 | enum btrace_error |
734b0e4b | 3631 | target_read_btrace (struct btrace_data *btrace, |
969c39fb | 3632 | struct btrace_target_info *btinfo, |
02d27625 MM |
3633 | enum btrace_read_type type) |
3634 | { | |
8b88a78e | 3635 | return current_top_target ()->read_btrace (btrace, btinfo, type); |
02d27625 MM |
3636 | } |
3637 | ||
d02ed0bb MM |
3638 | /* See target.h. */ |
3639 | ||
f4abbc16 MM |
3640 | const struct btrace_config * |
3641 | target_btrace_conf (const struct btrace_target_info *btinfo) | |
3642 | { | |
8b88a78e | 3643 | return current_top_target ()->btrace_conf (btinfo); |
f4abbc16 MM |
3644 | } |
3645 | ||
3646 | /* See target.h. */ | |
3647 | ||
7c1687a9 MM |
3648 | void |
3649 | target_stop_recording (void) | |
3650 | { | |
8b88a78e | 3651 | current_top_target ()->stop_recording (); |
7c1687a9 MM |
3652 | } |
3653 | ||
3654 | /* See target.h. */ | |
3655 | ||
d02ed0bb | 3656 | void |
85e1311a | 3657 | target_save_record (const char *filename) |
d02ed0bb | 3658 | { |
8b88a78e | 3659 | current_top_target ()->save_record (filename); |
d02ed0bb MM |
3660 | } |
3661 | ||
3662 | /* See target.h. */ | |
3663 | ||
3664 | int | |
f6ac5f3d | 3665 | target_supports_delete_record () |
d02ed0bb | 3666 | { |
8b88a78e | 3667 | return current_top_target ()->supports_delete_record (); |
d02ed0bb MM |
3668 | } |
3669 | ||
3670 | /* See target.h. */ | |
3671 | ||
3672 | void | |
3673 | target_delete_record (void) | |
3674 | { | |
8b88a78e | 3675 | current_top_target ()->delete_record (); |
d02ed0bb MM |
3676 | } |
3677 | ||
3678 | /* See target.h. */ | |
3679 | ||
b158a20f TW |
3680 | enum record_method |
3681 | target_record_method (ptid_t ptid) | |
3682 | { | |
8b88a78e | 3683 | return current_top_target ()->record_method (ptid); |
b158a20f TW |
3684 | } |
3685 | ||
3686 | /* See target.h. */ | |
3687 | ||
d02ed0bb | 3688 | int |
a52eab48 | 3689 | target_record_is_replaying (ptid_t ptid) |
d02ed0bb | 3690 | { |
8b88a78e | 3691 | return current_top_target ()->record_is_replaying (ptid); |
d02ed0bb MM |
3692 | } |
3693 | ||
3694 | /* See target.h. */ | |
3695 | ||
7ff27e9b MM |
3696 | int |
3697 | target_record_will_replay (ptid_t ptid, int dir) | |
3698 | { | |
8b88a78e | 3699 | return current_top_target ()->record_will_replay (ptid, dir); |
7ff27e9b MM |
3700 | } |
3701 | ||
3702 | /* See target.h. */ | |
3703 | ||
797094dd MM |
3704 | void |
3705 | target_record_stop_replaying (void) | |
3706 | { | |
8b88a78e | 3707 | current_top_target ()->record_stop_replaying (); |
797094dd MM |
3708 | } |
3709 | ||
3710 | /* See target.h. */ | |
3711 | ||
d02ed0bb MM |
3712 | void |
3713 | target_goto_record_begin (void) | |
3714 | { | |
8b88a78e | 3715 | current_top_target ()->goto_record_begin (); |
d02ed0bb MM |
3716 | } |
3717 | ||
3718 | /* See target.h. */ | |
3719 | ||
3720 | void | |
3721 | target_goto_record_end (void) | |
3722 | { | |
8b88a78e | 3723 | current_top_target ()->goto_record_end (); |
d02ed0bb MM |
3724 | } |
3725 | ||
3726 | /* See target.h. */ | |
3727 | ||
3728 | void | |
3729 | target_goto_record (ULONGEST insn) | |
3730 | { | |
8b88a78e | 3731 | current_top_target ()->goto_record (insn); |
d02ed0bb MM |
3732 | } |
3733 | ||
67c86d06 MM |
3734 | /* See target.h. */ |
3735 | ||
3736 | void | |
9a24775b | 3737 | target_insn_history (int size, gdb_disassembly_flags flags) |
67c86d06 | 3738 | { |
8b88a78e | 3739 | current_top_target ()->insn_history (size, flags); |
67c86d06 MM |
3740 | } |
3741 | ||
3742 | /* See target.h. */ | |
3743 | ||
3744 | void | |
9a24775b PA |
3745 | target_insn_history_from (ULONGEST from, int size, |
3746 | gdb_disassembly_flags flags) | |
67c86d06 | 3747 | { |
8b88a78e | 3748 | current_top_target ()->insn_history_from (from, size, flags); |
67c86d06 MM |
3749 | } |
3750 | ||
3751 | /* See target.h. */ | |
3752 | ||
3753 | void | |
9a24775b PA |
3754 | target_insn_history_range (ULONGEST begin, ULONGEST end, |
3755 | gdb_disassembly_flags flags) | |
67c86d06 | 3756 | { |
8b88a78e | 3757 | current_top_target ()->insn_history_range (begin, end, flags); |
67c86d06 MM |
3758 | } |
3759 | ||
15984c13 MM |
3760 | /* See target.h. */ |
3761 | ||
3762 | void | |
0cb7c7b0 | 3763 | target_call_history (int size, record_print_flags flags) |
15984c13 | 3764 | { |
8b88a78e | 3765 | current_top_target ()->call_history (size, flags); |
15984c13 MM |
3766 | } |
3767 | ||
3768 | /* See target.h. */ | |
3769 | ||
3770 | void | |
0cb7c7b0 | 3771 | target_call_history_from (ULONGEST begin, int size, record_print_flags flags) |
15984c13 | 3772 | { |
8b88a78e | 3773 | current_top_target ()->call_history_from (begin, size, flags); |
15984c13 MM |
3774 | } |
3775 | ||
3776 | /* See target.h. */ | |
3777 | ||
3778 | void | |
0cb7c7b0 | 3779 | target_call_history_range (ULONGEST begin, ULONGEST end, record_print_flags flags) |
15984c13 | 3780 | { |
8b88a78e | 3781 | current_top_target ()->call_history_range (begin, end, flags); |
15984c13 MM |
3782 | } |
3783 | ||
ea001bdc MM |
3784 | /* See target.h. */ |
3785 | ||
3786 | const struct frame_unwind * | |
3787 | target_get_unwinder (void) | |
3788 | { | |
8b88a78e | 3789 | return current_top_target ()->get_unwinder (); |
ea001bdc MM |
3790 | } |
3791 | ||
3792 | /* See target.h. */ | |
3793 | ||
3794 | const struct frame_unwind * | |
3795 | target_get_tailcall_unwinder (void) | |
3796 | { | |
8b88a78e | 3797 | return current_top_target ()->get_tailcall_unwinder (); |
ea001bdc MM |
3798 | } |
3799 | ||
5fff78c4 MM |
3800 | /* See target.h. */ |
3801 | ||
3802 | void | |
3803 | target_prepare_to_generate_core (void) | |
3804 | { | |
8b88a78e | 3805 | current_top_target ()->prepare_to_generate_core (); |
5fff78c4 MM |
3806 | } |
3807 | ||
3808 | /* See target.h. */ | |
3809 | ||
3810 | void | |
3811 | target_done_generating_core (void) | |
3812 | { | |
8b88a78e | 3813 | current_top_target ()->done_generating_core (); |
5fff78c4 MM |
3814 | } |
3815 | ||
c906108c | 3816 | \f |
c5aa993b JM |
3817 | |
3818 | static char targ_desc[] = | |
3e43a32a MS |
3819 | "Names of targets and files being debugged.\nShows the entire \ |
3820 | stack of targets currently in use (including the exec-file,\n\ | |
c906108c SS |
3821 | core-file, and process, if any), as well as the symbol file name."; |
3822 | ||
a53f3625 | 3823 | static void |
a30bf1f1 TT |
3824 | default_rcmd (struct target_ops *self, const char *command, |
3825 | struct ui_file *output) | |
a53f3625 TT |
3826 | { |
3827 | error (_("\"monitor\" command not supported by this target.")); | |
3828 | } | |
3829 | ||
96baa820 | 3830 | static void |
0b39b52e | 3831 | do_monitor_command (const char *cmd, int from_tty) |
96baa820 | 3832 | { |
96baa820 JM |
3833 | target_rcmd (cmd, gdb_stdtarg); |
3834 | } | |
3835 | ||
78cbbba8 LM |
3836 | /* Erases all the memory regions marked as flash. CMD and FROM_TTY are |
3837 | ignored. */ | |
3838 | ||
3839 | void | |
0b39b52e | 3840 | flash_erase_command (const char *cmd, int from_tty) |
78cbbba8 LM |
3841 | { |
3842 | /* Used to communicate termination of flash operations to the target. */ | |
3843 | bool found_flash_region = false; | |
78cbbba8 LM |
3844 | struct gdbarch *gdbarch = target_gdbarch (); |
3845 | ||
a664f67e | 3846 | std::vector<mem_region> mem_regions = target_memory_map (); |
78cbbba8 LM |
3847 | |
3848 | /* Iterate over all memory regions. */ | |
a664f67e | 3849 | for (const mem_region &m : mem_regions) |
78cbbba8 | 3850 | { |
78cbbba8 | 3851 | /* Is this a flash memory region? */ |
a664f67e | 3852 | if (m.attrib.mode == MEM_FLASH) |
78cbbba8 LM |
3853 | { |
3854 | found_flash_region = true; | |
a664f67e | 3855 | target_flash_erase (m.lo, m.hi - m.lo); |
78cbbba8 | 3856 | |
76f9c9cf | 3857 | ui_out_emit_tuple tuple_emitter (current_uiout, "erased-regions"); |
78cbbba8 LM |
3858 | |
3859 | current_uiout->message (_("Erasing flash memory region at address ")); | |
a664f67e | 3860 | current_uiout->field_fmt ("address", "%s", paddress (gdbarch, m.lo)); |
78cbbba8 | 3861 | current_uiout->message (", size = "); |
a664f67e | 3862 | current_uiout->field_fmt ("size", "%s", hex_string (m.hi - m.lo)); |
78cbbba8 | 3863 | current_uiout->message ("\n"); |
78cbbba8 LM |
3864 | } |
3865 | } | |
3866 | ||
3867 | /* Did we do any flash operations? If so, we need to finalize them. */ | |
3868 | if (found_flash_region) | |
3869 | target_flash_done (); | |
3870 | else | |
3871 | current_uiout->message (_("No flash memory regions found.\n")); | |
3872 | } | |
3873 | ||
87680a14 JB |
3874 | /* Print the name of each layers of our target stack. */ |
3875 | ||
3876 | static void | |
d3cb6b99 | 3877 | maintenance_print_target_stack (const char *cmd, int from_tty) |
87680a14 | 3878 | { |
87680a14 JB |
3879 | printf_filtered (_("The current target stack is:\n")); |
3880 | ||
b6a8c27b | 3881 | for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
87680a14 | 3882 | { |
f6ac5f3d PA |
3883 | if (t->to_stratum == debug_stratum) |
3884 | continue; | |
3885 | printf_filtered (" - %s (%s)\n", t->shortname (), t->longname ()); | |
87680a14 JB |
3886 | } |
3887 | } | |
3888 | ||
372316f1 PA |
3889 | /* See target.h. */ |
3890 | ||
3891 | void | |
3892 | target_async (int enable) | |
3893 | { | |
3894 | infrun_async (enable); | |
8b88a78e | 3895 | current_top_target ()->async (enable); |
372316f1 PA |
3896 | } |
3897 | ||
65706a29 PA |
3898 | /* See target.h. */ |
3899 | ||
3900 | void | |
3901 | target_thread_events (int enable) | |
3902 | { | |
8b88a78e | 3903 | current_top_target ()->thread_events (enable); |
65706a29 PA |
3904 | } |
3905 | ||
329ea579 PA |
3906 | /* Controls if targets can report that they can/are async. This is |
3907 | just for maintainers to use when debugging gdb. */ | |
3908 | int target_async_permitted = 1; | |
c6ebd6cf VP |
3909 | |
3910 | /* The set command writes to this variable. If the inferior is | |
b5419e49 | 3911 | executing, target_async_permitted is *not* updated. */ |
329ea579 | 3912 | static int target_async_permitted_1 = 1; |
c6ebd6cf VP |
3913 | |
3914 | static void | |
eb4c3f4a | 3915 | maint_set_target_async_command (const char *args, int from_tty, |
329ea579 | 3916 | struct cmd_list_element *c) |
c6ebd6cf | 3917 | { |
c35b1492 | 3918 | if (have_live_inferiors ()) |
c6ebd6cf VP |
3919 | { |
3920 | target_async_permitted_1 = target_async_permitted; | |
3921 | error (_("Cannot change this setting while the inferior is running.")); | |
3922 | } | |
3923 | ||
3924 | target_async_permitted = target_async_permitted_1; | |
3925 | } | |
3926 | ||
3927 | static void | |
329ea579 PA |
3928 | maint_show_target_async_command (struct ui_file *file, int from_tty, |
3929 | struct cmd_list_element *c, | |
3930 | const char *value) | |
c6ebd6cf | 3931 | { |
3e43a32a MS |
3932 | fprintf_filtered (file, |
3933 | _("Controlling the inferior in " | |
3934 | "asynchronous mode is %s.\n"), value); | |
c6ebd6cf VP |
3935 | } |
3936 | ||
fbea99ea PA |
3937 | /* Return true if the target operates in non-stop mode even with "set |
3938 | non-stop off". */ | |
3939 | ||
3940 | static int | |
3941 | target_always_non_stop_p (void) | |
3942 | { | |
8b88a78e | 3943 | return current_top_target ()->always_non_stop_p (); |
fbea99ea PA |
3944 | } |
3945 | ||
3946 | /* See target.h. */ | |
3947 | ||
3948 | int | |
3949 | target_is_non_stop_p (void) | |
3950 | { | |
3951 | return (non_stop | |
3952 | || target_non_stop_enabled == AUTO_BOOLEAN_TRUE | |
3953 | || (target_non_stop_enabled == AUTO_BOOLEAN_AUTO | |
3954 | && target_always_non_stop_p ())); | |
3955 | } | |
3956 | ||
3957 | /* Controls if targets can report that they always run in non-stop | |
3958 | mode. This is just for maintainers to use when debugging gdb. */ | |
3959 | enum auto_boolean target_non_stop_enabled = AUTO_BOOLEAN_AUTO; | |
3960 | ||
3961 | /* The set command writes to this variable. If the inferior is | |
3962 | executing, target_non_stop_enabled is *not* updated. */ | |
3963 | static enum auto_boolean target_non_stop_enabled_1 = AUTO_BOOLEAN_AUTO; | |
3964 | ||
3965 | /* Implementation of "maint set target-non-stop". */ | |
3966 | ||
3967 | static void | |
eb4c3f4a | 3968 | maint_set_target_non_stop_command (const char *args, int from_tty, |
fbea99ea PA |
3969 | struct cmd_list_element *c) |
3970 | { | |
3971 | if (have_live_inferiors ()) | |
3972 | { | |
3973 | target_non_stop_enabled_1 = target_non_stop_enabled; | |
3974 | error (_("Cannot change this setting while the inferior is running.")); | |
3975 | } | |
3976 | ||
3977 | target_non_stop_enabled = target_non_stop_enabled_1; | |
3978 | } | |
3979 | ||
3980 | /* Implementation of "maint show target-non-stop". */ | |
3981 | ||
3982 | static void | |
3983 | maint_show_target_non_stop_command (struct ui_file *file, int from_tty, | |
3984 | struct cmd_list_element *c, | |
3985 | const char *value) | |
3986 | { | |
3987 | if (target_non_stop_enabled == AUTO_BOOLEAN_AUTO) | |
3988 | fprintf_filtered (file, | |
3989 | _("Whether the target is always in non-stop mode " | |
3990 | "is %s (currently %s).\n"), value, | |
3991 | target_always_non_stop_p () ? "on" : "off"); | |
3992 | else | |
3993 | fprintf_filtered (file, | |
3994 | _("Whether the target is always in non-stop mode " | |
3995 | "is %s.\n"), value); | |
3996 | } | |
3997 | ||
d914c394 SS |
3998 | /* Temporary copies of permission settings. */ |
3999 | ||
4000 | static int may_write_registers_1 = 1; | |
4001 | static int may_write_memory_1 = 1; | |
4002 | static int may_insert_breakpoints_1 = 1; | |
4003 | static int may_insert_tracepoints_1 = 1; | |
4004 | static int may_insert_fast_tracepoints_1 = 1; | |
4005 | static int may_stop_1 = 1; | |
4006 | ||
4007 | /* Make the user-set values match the real values again. */ | |
4008 | ||
4009 | void | |
4010 | update_target_permissions (void) | |
4011 | { | |
4012 | may_write_registers_1 = may_write_registers; | |
4013 | may_write_memory_1 = may_write_memory; | |
4014 | may_insert_breakpoints_1 = may_insert_breakpoints; | |
4015 | may_insert_tracepoints_1 = may_insert_tracepoints; | |
4016 | may_insert_fast_tracepoints_1 = may_insert_fast_tracepoints; | |
4017 | may_stop_1 = may_stop; | |
4018 | } | |
4019 | ||
4020 | /* The one function handles (most of) the permission flags in the same | |
4021 | way. */ | |
4022 | ||
4023 | static void | |
eb4c3f4a | 4024 | set_target_permissions (const char *args, int from_tty, |
d914c394 SS |
4025 | struct cmd_list_element *c) |
4026 | { | |
4027 | if (target_has_execution) | |
4028 | { | |
4029 | update_target_permissions (); | |
4030 | error (_("Cannot change this setting while the inferior is running.")); | |
4031 | } | |
4032 | ||
4033 | /* Make the real values match the user-changed values. */ | |
4034 | may_write_registers = may_write_registers_1; | |
4035 | may_insert_breakpoints = may_insert_breakpoints_1; | |
4036 | may_insert_tracepoints = may_insert_tracepoints_1; | |
4037 | may_insert_fast_tracepoints = may_insert_fast_tracepoints_1; | |
4038 | may_stop = may_stop_1; | |
4039 | update_observer_mode (); | |
4040 | } | |
4041 | ||
4042 | /* Set memory write permission independently of observer mode. */ | |
4043 | ||
4044 | static void | |
eb4c3f4a | 4045 | set_write_memory_permission (const char *args, int from_tty, |
d914c394 SS |
4046 | struct cmd_list_element *c) |
4047 | { | |
4048 | /* Make the real values match the user-changed values. */ | |
4049 | may_write_memory = may_write_memory_1; | |
4050 | update_observer_mode (); | |
4051 | } | |
4052 | ||
c906108c | 4053 | void |
fba45db2 | 4054 | initialize_targets (void) |
c906108c | 4055 | { |
f6ac5f3d PA |
4056 | the_dummy_target = new dummy_target (); |
4057 | push_target (the_dummy_target); | |
4058 | ||
4059 | the_debug_target = new debug_target (); | |
c906108c | 4060 | |
11db9430 SM |
4061 | add_info ("target", info_target_command, targ_desc); |
4062 | add_info ("files", info_target_command, targ_desc); | |
c906108c | 4063 | |
ccce17b0 | 4064 | add_setshow_zuinteger_cmd ("target", class_maintenance, &targetdebug, _("\ |
85c07804 AC |
4065 | Set target debugging."), _("\ |
4066 | Show target debugging."), _("\ | |
333dabeb | 4067 | When non-zero, target debugging is enabled. Higher numbers are more\n\ |
3cecbbbe TT |
4068 | verbose."), |
4069 | set_targetdebug, | |
ccce17b0 YQ |
4070 | show_targetdebug, |
4071 | &setdebuglist, &showdebuglist); | |
3a11626d | 4072 | |
2bc416ba | 4073 | add_setshow_boolean_cmd ("trust-readonly-sections", class_support, |
7915a72c AC |
4074 | &trust_readonly, _("\ |
4075 | Set mode for reading from readonly sections."), _("\ | |
4076 | Show mode for reading from readonly sections."), _("\ | |
3a11626d MS |
4077 | When this mode is on, memory reads from readonly sections (such as .text)\n\ |
4078 | will be read from the object file instead of from the target. This will\n\ | |
7915a72c | 4079 | result in significant performance improvement for remote targets."), |
2c5b56ce | 4080 | NULL, |
920d2a44 | 4081 | show_trust_readonly, |
e707bbc2 | 4082 | &setlist, &showlist); |
96baa820 JM |
4083 | |
4084 | add_com ("monitor", class_obscure, do_monitor_command, | |
1bedd215 | 4085 | _("Send a command to the remote monitor (remote targets only).")); |
96baa820 | 4086 | |
87680a14 JB |
4087 | add_cmd ("target-stack", class_maintenance, maintenance_print_target_stack, |
4088 | _("Print the name of each layer of the internal target stack."), | |
4089 | &maintenanceprintlist); | |
4090 | ||
c6ebd6cf VP |
4091 | add_setshow_boolean_cmd ("target-async", no_class, |
4092 | &target_async_permitted_1, _("\ | |
4093 | Set whether gdb controls the inferior in asynchronous mode."), _("\ | |
4094 | Show whether gdb controls the inferior in asynchronous mode."), _("\ | |
4095 | Tells gdb whether to control the inferior in asynchronous mode."), | |
329ea579 PA |
4096 | maint_set_target_async_command, |
4097 | maint_show_target_async_command, | |
4098 | &maintenance_set_cmdlist, | |
4099 | &maintenance_show_cmdlist); | |
c6ebd6cf | 4100 | |
fbea99ea PA |
4101 | add_setshow_auto_boolean_cmd ("target-non-stop", no_class, |
4102 | &target_non_stop_enabled_1, _("\ | |
4103 | Set whether gdb always controls the inferior in non-stop mode."), _("\ | |
4104 | Show whether gdb always controls the inferior in non-stop mode."), _("\ | |
4105 | Tells gdb whether to control the inferior in non-stop mode."), | |
4106 | maint_set_target_non_stop_command, | |
4107 | maint_show_target_non_stop_command, | |
4108 | &maintenance_set_cmdlist, | |
4109 | &maintenance_show_cmdlist); | |
4110 | ||
d914c394 SS |
4111 | add_setshow_boolean_cmd ("may-write-registers", class_support, |
4112 | &may_write_registers_1, _("\ | |
4113 | Set permission to write into registers."), _("\ | |
4114 | Show permission to write into registers."), _("\ | |
4115 | When this permission is on, GDB may write into the target's registers.\n\ | |
4116 | Otherwise, any sort of write attempt will result in an error."), | |
4117 | set_target_permissions, NULL, | |
4118 | &setlist, &showlist); | |
4119 | ||
4120 | add_setshow_boolean_cmd ("may-write-memory", class_support, | |
4121 | &may_write_memory_1, _("\ | |
4122 | Set permission to write into target memory."), _("\ | |
4123 | Show permission to write into target memory."), _("\ | |
4124 | When this permission is on, GDB may write into the target's memory.\n\ | |
4125 | Otherwise, any sort of write attempt will result in an error."), | |
4126 | set_write_memory_permission, NULL, | |
4127 | &setlist, &showlist); | |
4128 | ||
4129 | add_setshow_boolean_cmd ("may-insert-breakpoints", class_support, | |
4130 | &may_insert_breakpoints_1, _("\ | |
4131 | Set permission to insert breakpoints in the target."), _("\ | |
4132 | Show permission to insert breakpoints in the target."), _("\ | |
4133 | When this permission is on, GDB may insert breakpoints in the program.\n\ | |
4134 | Otherwise, any sort of insertion attempt will result in an error."), | |
4135 | set_target_permissions, NULL, | |
4136 | &setlist, &showlist); | |
4137 | ||
4138 | add_setshow_boolean_cmd ("may-insert-tracepoints", class_support, | |
4139 | &may_insert_tracepoints_1, _("\ | |
4140 | Set permission to insert tracepoints in the target."), _("\ | |
4141 | Show permission to insert tracepoints in the target."), _("\ | |
4142 | When this permission is on, GDB may insert tracepoints in the program.\n\ | |
4143 | Otherwise, any sort of insertion attempt will result in an error."), | |
4144 | set_target_permissions, NULL, | |
4145 | &setlist, &showlist); | |
4146 | ||
4147 | add_setshow_boolean_cmd ("may-insert-fast-tracepoints", class_support, | |
4148 | &may_insert_fast_tracepoints_1, _("\ | |
4149 | Set permission to insert fast tracepoints in the target."), _("\ | |
4150 | Show permission to insert fast tracepoints in the target."), _("\ | |
4151 | When this permission is on, GDB may insert fast tracepoints.\n\ | |
4152 | Otherwise, any sort of insertion attempt will result in an error."), | |
4153 | set_target_permissions, NULL, | |
4154 | &setlist, &showlist); | |
4155 | ||
4156 | add_setshow_boolean_cmd ("may-interrupt", class_support, | |
4157 | &may_stop_1, _("\ | |
4158 | Set permission to interrupt or signal the target."), _("\ | |
4159 | Show permission to interrupt or signal the target."), _("\ | |
4160 | When this permission is on, GDB may interrupt/stop the target's execution.\n\ | |
4161 | Otherwise, any attempt to interrupt or stop will be ignored."), | |
4162 | set_target_permissions, NULL, | |
4163 | &setlist, &showlist); | |
6a3cb8e8 | 4164 | |
78cbbba8 LM |
4165 | add_com ("flash-erase", no_class, flash_erase_command, |
4166 | _("Erase all flash memory regions.")); | |
4167 | ||
6a3cb8e8 PA |
4168 | add_setshow_boolean_cmd ("auto-connect-native-target", class_support, |
4169 | &auto_connect_native_target, _("\ | |
4170 | Set whether GDB may automatically connect to the native target."), _("\ | |
4171 | Show whether GDB may automatically connect to the native target."), _("\ | |
4172 | When on, and GDB is not connected to a target yet, GDB\n\ | |
4173 | attempts \"run\" and other commands with the native target."), | |
4174 | NULL, show_auto_connect_native_target, | |
4175 | &setlist, &showlist); | |
c906108c | 4176 | } |