Commit | Line | Data |
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c906108c | 1 | /* Select target systems and architectures at runtime for GDB. |
7998dfc3 | 2 | |
b811d2c2 | 3 | Copyright (C) 1990-2020 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" |
268a13a5 | 43 | #include "gdbsupport/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> |
268a13a5 | 49 | #include "gdbsupport/byte-vector.h" |
e671cd59 | 50 | #include "terminal.h" |
d9f719f1 | 51 | #include <unordered_map> |
121b3efd | 52 | #include "target-connection.h" |
670e35fa | 53 | #include "valprint.h" |
c906108c | 54 | |
f0f9ff95 TT |
55 | static void generic_tls_error (void) ATTRIBUTE_NORETURN; |
56 | ||
0a4f40a2 | 57 | static void default_terminal_info (struct target_ops *, const char *, int); |
c906108c | 58 | |
5009afc5 AS |
59 | static int default_watchpoint_addr_within_range (struct target_ops *, |
60 | CORE_ADDR, CORE_ADDR, int); | |
61 | ||
31568a15 TT |
62 | static int default_region_ok_for_hw_watchpoint (struct target_ops *, |
63 | CORE_ADDR, int); | |
e0d24f8d | 64 | |
a30bf1f1 | 65 | static void default_rcmd (struct target_ops *, const char *, struct ui_file *); |
a53f3625 | 66 | |
4229b31d TT |
67 | static ptid_t default_get_ada_task_ptid (struct target_ops *self, |
68 | long lwp, long tid); | |
69 | ||
8d657035 TT |
70 | static void default_mourn_inferior (struct target_ops *self); |
71 | ||
58a5184e TT |
72 | static int default_search_memory (struct target_ops *ops, |
73 | CORE_ADDR start_addr, | |
74 | ULONGEST search_space_len, | |
75 | const gdb_byte *pattern, | |
76 | ULONGEST pattern_len, | |
77 | CORE_ADDR *found_addrp); | |
78 | ||
936d2992 PA |
79 | static int default_verify_memory (struct target_ops *self, |
80 | const gdb_byte *data, | |
81 | CORE_ADDR memaddr, ULONGEST size); | |
82 | ||
c25c4a8b | 83 | static void tcomplain (void) ATTRIBUTE_NORETURN; |
c906108c | 84 | |
a121b7c1 | 85 | static struct target_ops *find_default_run_target (const char *); |
c906108c | 86 | |
0b5a2719 TT |
87 | static int dummy_find_memory_regions (struct target_ops *self, |
88 | find_memory_region_ftype ignore1, | |
89 | void *ignore2); | |
90 | ||
16f796b1 TT |
91 | static char *dummy_make_corefile_notes (struct target_ops *self, |
92 | bfd *ignore1, int *ignore2); | |
93 | ||
a068643d | 94 | static std::string default_pid_to_str (struct target_ops *ops, ptid_t ptid); |
770234d3 | 95 | |
fe31bf5b TT |
96 | static enum exec_direction_kind default_execution_direction |
97 | (struct target_ops *self); | |
98 | ||
d9f719f1 PA |
99 | /* Mapping between target_info objects (which have address identity) |
100 | and corresponding open/factory function/callback. Each add_target | |
101 | call adds one entry to this map, and registers a "target | |
102 | TARGET_NAME" command that when invoked calls the factory registered | |
103 | here. The target_info object is associated with the command via | |
104 | the command's context. */ | |
105 | static std::unordered_map<const target_info *, target_open_ftype *> | |
106 | target_factories; | |
c906108c | 107 | |
06b5b831 | 108 | /* The singleton debug target. */ |
c906108c | 109 | |
f6ac5f3d | 110 | static struct target_ops *the_debug_target; |
c906108c SS |
111 | |
112 | /* Top of target stack. */ | |
c906108c SS |
113 | /* The target structure we are currently using to talk to a process |
114 | or file or whatever "inferior" we have. */ | |
115 | ||
8b88a78e PA |
116 | target_ops * |
117 | current_top_target () | |
118 | { | |
5b6d1e4f | 119 | return current_inferior ()->top_target (); |
8b88a78e | 120 | } |
c906108c SS |
121 | |
122 | /* Command list for target. */ | |
123 | ||
124 | static struct cmd_list_element *targetlist = NULL; | |
125 | ||
491144b5 | 126 | /* True if we should trust readonly sections from the |
cf7a04e8 DJ |
127 | executable when reading memory. */ |
128 | ||
491144b5 | 129 | static bool trust_readonly = false; |
cf7a04e8 | 130 | |
8defab1a DJ |
131 | /* Nonzero if we should show true memory content including |
132 | memory breakpoint inserted by gdb. */ | |
133 | ||
134 | static int show_memory_breakpoints = 0; | |
135 | ||
d914c394 SS |
136 | /* These globals control whether GDB attempts to perform these |
137 | operations; they are useful for targets that need to prevent | |
30baf67b | 138 | inadvertent disruption, such as in non-stop mode. */ |
d914c394 | 139 | |
491144b5 | 140 | bool may_write_registers = true; |
d914c394 | 141 | |
491144b5 | 142 | bool may_write_memory = true; |
d914c394 | 143 | |
491144b5 | 144 | bool may_insert_breakpoints = true; |
d914c394 | 145 | |
491144b5 | 146 | bool may_insert_tracepoints = true; |
d914c394 | 147 | |
491144b5 | 148 | bool may_insert_fast_tracepoints = true; |
d914c394 | 149 | |
491144b5 | 150 | bool may_stop = true; |
d914c394 | 151 | |
c906108c SS |
152 | /* Non-zero if we want to see trace of target level stuff. */ |
153 | ||
ccce17b0 | 154 | static unsigned int targetdebug = 0; |
3cecbbbe TT |
155 | |
156 | static void | |
eb4c3f4a | 157 | set_targetdebug (const char *args, int from_tty, struct cmd_list_element *c) |
3cecbbbe | 158 | { |
f6ac5f3d PA |
159 | if (targetdebug) |
160 | push_target (the_debug_target); | |
161 | else | |
162 | unpush_target (the_debug_target); | |
3cecbbbe TT |
163 | } |
164 | ||
920d2a44 AC |
165 | static void |
166 | show_targetdebug (struct ui_file *file, int from_tty, | |
167 | struct cmd_list_element *c, const char *value) | |
168 | { | |
169 | fprintf_filtered (file, _("Target debugging is %s.\n"), value); | |
170 | } | |
c906108c | 171 | |
c35b1492 | 172 | int |
a739972c | 173 | target_has_memory () |
c35b1492 | 174 | { |
b6a8c27b | 175 | for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
f6ac5f3d | 176 | if (t->has_memory ()) |
c35b1492 PA |
177 | return 1; |
178 | ||
179 | return 0; | |
180 | } | |
181 | ||
182 | int | |
183 | target_has_stack_1 (void) | |
184 | { | |
b6a8c27b | 185 | for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
f6ac5f3d | 186 | if (t->has_stack ()) |
c35b1492 PA |
187 | return 1; |
188 | ||
189 | return 0; | |
190 | } | |
191 | ||
192 | int | |
193 | target_has_registers_1 (void) | |
194 | { | |
b6a8c27b | 195 | for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
f6ac5f3d | 196 | if (t->has_registers ()) |
c35b1492 PA |
197 | return 1; |
198 | ||
199 | return 0; | |
200 | } | |
201 | ||
5018ce90 PA |
202 | bool |
203 | target_has_execution_1 (inferior *inf) | |
c35b1492 | 204 | { |
5b6d1e4f PA |
205 | for (target_ops *t = inf->top_target (); |
206 | t != nullptr; | |
207 | t = inf->find_target_beneath (t)) | |
5018ce90 PA |
208 | if (t->has_execution (inf)) |
209 | return true; | |
c35b1492 | 210 | |
5018ce90 | 211 | return false; |
c35b1492 PA |
212 | } |
213 | ||
aeaec162 TT |
214 | int |
215 | target_has_execution_current (void) | |
216 | { | |
5018ce90 | 217 | return target_has_execution_1 (current_inferior ()); |
aeaec162 TT |
218 | } |
219 | ||
8981c758 TT |
220 | /* This is used to implement the various target commands. */ |
221 | ||
222 | static void | |
eb4c3f4a | 223 | open_target (const char *args, int from_tty, struct cmd_list_element *command) |
8981c758 | 224 | { |
d9f719f1 PA |
225 | auto *ti = static_cast<target_info *> (get_cmd_context (command)); |
226 | target_open_ftype *func = target_factories[ti]; | |
8981c758 TT |
227 | |
228 | if (targetdebug) | |
d9f719f1 PA |
229 | fprintf_unfiltered (gdb_stdlog, "-> %s->open (...)\n", |
230 | ti->shortname); | |
8981c758 | 231 | |
d9f719f1 | 232 | func (args, from_tty); |
8981c758 TT |
233 | |
234 | if (targetdebug) | |
d9f719f1 PA |
235 | fprintf_unfiltered (gdb_stdlog, "<- %s->open (%s, %d)\n", |
236 | ti->shortname, args, from_tty); | |
8981c758 TT |
237 | } |
238 | ||
d9f719f1 | 239 | /* See target.h. */ |
c22a2b88 TT |
240 | |
241 | void | |
d9f719f1 PA |
242 | add_target (const target_info &t, target_open_ftype *func, |
243 | completer_ftype *completer) | |
c22a2b88 TT |
244 | { |
245 | struct cmd_list_element *c; | |
246 | ||
d9f719f1 PA |
247 | auto &func_slot = target_factories[&t]; |
248 | if (func_slot != nullptr) | |
249 | internal_error (__FILE__, __LINE__, | |
250 | _("target already added (\"%s\")."), t.shortname); | |
251 | func_slot = func; | |
c906108c SS |
252 | |
253 | if (targetlist == NULL) | |
3b6acaee | 254 | add_basic_prefix_cmd ("target", class_run, _("\ |
1bedd215 | 255 | Connect to a target machine or process.\n\ |
c906108c SS |
256 | The first argument is the type or protocol of the target machine.\n\ |
257 | Remaining arguments are interpreted by the target protocol. For more\n\ | |
258 | information on the arguments for a particular protocol, type\n\ | |
1bedd215 | 259 | `help target ' followed by the protocol name."), |
3b6acaee | 260 | &targetlist, "target ", 0, &cmdlist); |
d9f719f1 PA |
261 | c = add_cmd (t.shortname, no_class, t.doc, &targetlist); |
262 | set_cmd_context (c, (void *) &t); | |
8981c758 | 263 | set_cmd_sfunc (c, open_target); |
9852c492 YQ |
264 | if (completer != NULL) |
265 | set_cmd_completer (c, completer); | |
266 | } | |
267 | ||
b48d48eb MM |
268 | /* See target.h. */ |
269 | ||
270 | void | |
d9f719f1 | 271 | add_deprecated_target_alias (const target_info &tinfo, const char *alias) |
b48d48eb MM |
272 | { |
273 | struct cmd_list_element *c; | |
274 | char *alt; | |
275 | ||
276 | /* If we use add_alias_cmd, here, we do not get the deprecated warning, | |
277 | see PR cli/15104. */ | |
d9f719f1 | 278 | c = add_cmd (alias, no_class, tinfo.doc, &targetlist); |
8981c758 | 279 | set_cmd_sfunc (c, open_target); |
d9f719f1 PA |
280 | set_cmd_context (c, (void *) &tinfo); |
281 | alt = xstrprintf ("target %s", tinfo.shortname); | |
b48d48eb MM |
282 | deprecate_cmd (c, alt); |
283 | } | |
284 | ||
c906108c SS |
285 | /* Stub functions */ |
286 | ||
7d85a9c0 JB |
287 | void |
288 | target_kill (void) | |
289 | { | |
8b88a78e | 290 | current_top_target ()->kill (); |
7d85a9c0 JB |
291 | } |
292 | ||
11cf8741 | 293 | void |
9cbe5fff | 294 | target_load (const char *arg, int from_tty) |
11cf8741 | 295 | { |
4e5d721f | 296 | target_dcache_invalidate (); |
8b88a78e | 297 | current_top_target ()->load (arg, from_tty); |
11cf8741 JM |
298 | } |
299 | ||
223ffa71 | 300 | /* Define it. */ |
5842f62a | 301 | |
e671cd59 PA |
302 | target_terminal_state target_terminal::m_terminal_state |
303 | = target_terminal_state::is_ours; | |
5842f62a | 304 | |
223ffa71 | 305 | /* See target/target.h. */ |
5842f62a PA |
306 | |
307 | void | |
223ffa71 | 308 | target_terminal::init (void) |
5842f62a | 309 | { |
8b88a78e | 310 | current_top_target ()->terminal_init (); |
5842f62a | 311 | |
e671cd59 | 312 | m_terminal_state = target_terminal_state::is_ours; |
5842f62a PA |
313 | } |
314 | ||
223ffa71 | 315 | /* See target/target.h. */ |
2f99e8fc | 316 | |
d9d2d8b6 | 317 | void |
223ffa71 | 318 | target_terminal::inferior (void) |
d9d2d8b6 | 319 | { |
41fd2b0f PA |
320 | struct ui *ui = current_ui; |
321 | ||
d9d2d8b6 | 322 | /* A background resume (``run&'') should leave GDB in control of the |
3b12939d PA |
323 | terminal. */ |
324 | if (ui->prompt_state != PROMPT_BLOCKED) | |
d9d2d8b6 PA |
325 | return; |
326 | ||
215d3118 PA |
327 | /* Since we always run the inferior in the main console (unless "set |
328 | inferior-tty" is in effect), when some UI other than the main one | |
223ffa71 TT |
329 | calls target_terminal::inferior, then we leave the main UI's |
330 | terminal settings as is. */ | |
215d3118 PA |
331 | if (ui != main_ui) |
332 | return; | |
333 | ||
d9d2d8b6 PA |
334 | /* If GDB is resuming the inferior in the foreground, install |
335 | inferior's terminal modes. */ | |
e671cd59 PA |
336 | |
337 | struct inferior *inf = current_inferior (); | |
338 | ||
339 | if (inf->terminal_state != target_terminal_state::is_inferior) | |
340 | { | |
8b88a78e | 341 | current_top_target ()->terminal_inferior (); |
e671cd59 PA |
342 | inf->terminal_state = target_terminal_state::is_inferior; |
343 | } | |
344 | ||
345 | m_terminal_state = target_terminal_state::is_inferior; | |
346 | ||
347 | /* If the user hit C-c before, pretend that it was hit right | |
348 | here. */ | |
349 | if (check_quit_flag ()) | |
350 | target_pass_ctrlc (); | |
351 | } | |
352 | ||
353 | /* See target/target.h. */ | |
354 | ||
355 | void | |
356 | target_terminal::restore_inferior (void) | |
357 | { | |
358 | struct ui *ui = current_ui; | |
359 | ||
360 | /* See target_terminal::inferior(). */ | |
361 | if (ui->prompt_state != PROMPT_BLOCKED || ui != main_ui) | |
362 | return; | |
363 | ||
364 | /* Restore the terminal settings of inferiors that were in the | |
365 | foreground but are now ours_for_output due to a temporary | |
366 | target_target::ours_for_output() call. */ | |
367 | ||
368 | { | |
369 | scoped_restore_current_inferior restore_inferior; | |
e671cd59 | 370 | |
84b68c77 | 371 | for (::inferior *inf : all_inferiors ()) |
e671cd59 PA |
372 | { |
373 | if (inf->terminal_state == target_terminal_state::is_ours_for_output) | |
374 | { | |
375 | set_current_inferior (inf); | |
8b88a78e | 376 | current_top_target ()->terminal_inferior (); |
e671cd59 PA |
377 | inf->terminal_state = target_terminal_state::is_inferior; |
378 | } | |
379 | } | |
380 | } | |
381 | ||
382 | m_terminal_state = target_terminal_state::is_inferior; | |
93692b58 PA |
383 | |
384 | /* If the user hit C-c before, pretend that it was hit right | |
385 | here. */ | |
386 | if (check_quit_flag ()) | |
387 | target_pass_ctrlc (); | |
5842f62a PA |
388 | } |
389 | ||
e671cd59 PA |
390 | /* Switch terminal state to DESIRED_STATE, either is_ours, or |
391 | is_ours_for_output. */ | |
392 | ||
393 | static void | |
394 | target_terminal_is_ours_kind (target_terminal_state desired_state) | |
395 | { | |
396 | scoped_restore_current_inferior restore_inferior; | |
e671cd59 PA |
397 | |
398 | /* Must do this in two passes. First, have all inferiors save the | |
399 | current terminal settings. Then, after all inferiors have add a | |
400 | chance to safely save the terminal settings, restore GDB's | |
401 | terminal settings. */ | |
402 | ||
08036331 | 403 | for (inferior *inf : all_inferiors ()) |
e671cd59 PA |
404 | { |
405 | if (inf->terminal_state == target_terminal_state::is_inferior) | |
406 | { | |
407 | set_current_inferior (inf); | |
8b88a78e | 408 | current_top_target ()->terminal_save_inferior (); |
e671cd59 PA |
409 | } |
410 | } | |
411 | ||
08036331 | 412 | for (inferior *inf : all_inferiors ()) |
e671cd59 PA |
413 | { |
414 | /* Note we don't check is_inferior here like above because we | |
415 | need to handle 'is_ours_for_output -> is_ours' too. Careful | |
416 | to never transition from 'is_ours' to 'is_ours_for_output', | |
417 | though. */ | |
418 | if (inf->terminal_state != target_terminal_state::is_ours | |
419 | && inf->terminal_state != desired_state) | |
420 | { | |
421 | set_current_inferior (inf); | |
422 | if (desired_state == target_terminal_state::is_ours) | |
8b88a78e | 423 | current_top_target ()->terminal_ours (); |
e671cd59 | 424 | else if (desired_state == target_terminal_state::is_ours_for_output) |
8b88a78e | 425 | current_top_target ()->terminal_ours_for_output (); |
e671cd59 PA |
426 | else |
427 | gdb_assert_not_reached ("unhandled desired state"); | |
428 | inf->terminal_state = desired_state; | |
429 | } | |
430 | } | |
431 | } | |
432 | ||
223ffa71 | 433 | /* See target/target.h. */ |
5842f62a PA |
434 | |
435 | void | |
223ffa71 | 436 | target_terminal::ours () |
5842f62a | 437 | { |
41fd2b0f PA |
438 | struct ui *ui = current_ui; |
439 | ||
223ffa71 | 440 | /* See target_terminal::inferior. */ |
215d3118 PA |
441 | if (ui != main_ui) |
442 | return; | |
443 | ||
e671cd59 | 444 | if (m_terminal_state == target_terminal_state::is_ours) |
5842f62a PA |
445 | return; |
446 | ||
e671cd59 PA |
447 | target_terminal_is_ours_kind (target_terminal_state::is_ours); |
448 | m_terminal_state = target_terminal_state::is_ours; | |
5842f62a PA |
449 | } |
450 | ||
223ffa71 | 451 | /* See target/target.h. */ |
5842f62a PA |
452 | |
453 | void | |
223ffa71 | 454 | target_terminal::ours_for_output () |
5842f62a | 455 | { |
215d3118 PA |
456 | struct ui *ui = current_ui; |
457 | ||
223ffa71 | 458 | /* See target_terminal::inferior. */ |
215d3118 PA |
459 | if (ui != main_ui) |
460 | return; | |
461 | ||
e671cd59 | 462 | if (!target_terminal::is_inferior ()) |
5842f62a | 463 | return; |
e671cd59 PA |
464 | |
465 | target_terminal_is_ours_kind (target_terminal_state::is_ours_for_output); | |
466 | target_terminal::m_terminal_state = target_terminal_state::is_ours_for_output; | |
d9d2d8b6 | 467 | } |
136d6dae | 468 | |
223ffa71 TT |
469 | /* See target/target.h. */ |
470 | ||
471 | void | |
472 | target_terminal::info (const char *arg, int from_tty) | |
473 | { | |
8b88a78e | 474 | current_top_target ()->terminal_info (arg, from_tty); |
223ffa71 TT |
475 | } |
476 | ||
b0ed115f TT |
477 | /* See target.h. */ |
478 | ||
20f0d60d | 479 | bool |
b0ed115f TT |
480 | target_supports_terminal_ours (void) |
481 | { | |
5b6d1e4f PA |
482 | /* The current top target is the target at the top of the target |
483 | stack of the current inferior. While normally there's always an | |
484 | inferior, we must check for nullptr here because we can get here | |
485 | very early during startup, before the initial inferior is first | |
486 | created. */ | |
487 | inferior *inf = current_inferior (); | |
20f0d60d | 488 | |
5b6d1e4f | 489 | if (inf == nullptr) |
20f0d60d | 490 | return false; |
5b6d1e4f | 491 | return inf->top_target ()->supports_terminal_ours (); |
b0ed115f TT |
492 | } |
493 | ||
c906108c | 494 | static void |
fba45db2 | 495 | tcomplain (void) |
c906108c | 496 | { |
8a3fe4f8 | 497 | error (_("You can't do that when your target is `%s'"), |
8b88a78e | 498 | current_top_target ()->shortname ()); |
c906108c SS |
499 | } |
500 | ||
501 | void | |
fba45db2 | 502 | noprocess (void) |
c906108c | 503 | { |
8a3fe4f8 | 504 | error (_("You can't do that without a process to debug.")); |
c906108c SS |
505 | } |
506 | ||
c906108c | 507 | static void |
0a4f40a2 | 508 | default_terminal_info (struct target_ops *self, const char *args, int from_tty) |
c906108c | 509 | { |
a3f17187 | 510 | printf_unfiltered (_("No saved terminal information.\n")); |
c906108c SS |
511 | } |
512 | ||
0ef643c8 JB |
513 | /* A default implementation for the to_get_ada_task_ptid target method. |
514 | ||
515 | This function builds the PTID by using both LWP and TID as part of | |
516 | the PTID lwp and tid elements. The pid used is the pid of the | |
517 | inferior_ptid. */ | |
518 | ||
2c0b251b | 519 | static ptid_t |
1e6b91a4 | 520 | default_get_ada_task_ptid (struct target_ops *self, long lwp, long tid) |
0ef643c8 | 521 | { |
e99b03dc | 522 | return ptid_t (inferior_ptid.pid (), lwp, tid); |
0ef643c8 JB |
523 | } |
524 | ||
32231432 | 525 | static enum exec_direction_kind |
4c612759 | 526 | default_execution_direction (struct target_ops *self) |
32231432 PA |
527 | { |
528 | if (!target_can_execute_reverse) | |
529 | return EXEC_FORWARD; | |
530 | else if (!target_can_async_p ()) | |
531 | return EXEC_FORWARD; | |
532 | else | |
533 | gdb_assert_not_reached ("\ | |
534 | to_execution_direction must be implemented for reverse async"); | |
535 | } | |
536 | ||
a1740ee1 | 537 | /* See target.h. */ |
c906108c | 538 | |
5b6d1e4f PA |
539 | void |
540 | decref_target (target_ops *t) | |
541 | { | |
542 | t->decref (); | |
543 | if (t->refcount () == 0) | |
121b3efd PA |
544 | { |
545 | if (t->stratum () == process_stratum) | |
546 | connection_list_remove (as_process_stratum_target (t)); | |
547 | target_close (t); | |
548 | } | |
5b6d1e4f PA |
549 | } |
550 | ||
551 | /* See target.h. */ | |
552 | ||
b26a4dcb | 553 | void |
a1740ee1 | 554 | target_stack::push (target_ops *t) |
c906108c | 555 | { |
5b6d1e4f PA |
556 | t->incref (); |
557 | ||
66b4deae PA |
558 | strata stratum = t->stratum (); |
559 | ||
121b3efd PA |
560 | if (stratum == process_stratum) |
561 | connection_list_add (as_process_stratum_target (t)); | |
562 | ||
5b6d1e4f PA |
563 | /* If there's already a target at this stratum, remove it. */ |
564 | ||
66b4deae | 565 | if (m_stack[stratum] != NULL) |
494409bb | 566 | unpush (m_stack[stratum]); |
c906108c | 567 | |
a1740ee1 | 568 | /* Now add the new one. */ |
66b4deae | 569 | m_stack[stratum] = t; |
5d502164 | 570 | |
66b4deae PA |
571 | if (m_top < stratum) |
572 | m_top = stratum; | |
a1740ee1 PA |
573 | } |
574 | ||
575 | /* See target.h. */ | |
c906108c | 576 | |
a1740ee1 PA |
577 | void |
578 | push_target (struct target_ops *t) | |
579 | { | |
5b6d1e4f | 580 | current_inferior ()->push_target (t); |
c906108c SS |
581 | } |
582 | ||
5b6d1e4f | 583 | /* See target.h. */ |
dea57a62 TT |
584 | |
585 | void | |
586 | push_target (target_ops_up &&t) | |
587 | { | |
5b6d1e4f | 588 | current_inferior ()->push_target (t.get ()); |
dea57a62 TT |
589 | t.release (); |
590 | } | |
591 | ||
a1740ee1 | 592 | /* See target.h. */ |
c906108c SS |
593 | |
594 | int | |
fba45db2 | 595 | unpush_target (struct target_ops *t) |
a1740ee1 | 596 | { |
5b6d1e4f | 597 | return current_inferior ()->unpush_target (t); |
a1740ee1 PA |
598 | } |
599 | ||
600 | /* See target.h. */ | |
601 | ||
602 | bool | |
603 | target_stack::unpush (target_ops *t) | |
c906108c | 604 | { |
1688cb29 TT |
605 | gdb_assert (t != NULL); |
606 | ||
66b4deae PA |
607 | strata stratum = t->stratum (); |
608 | ||
609 | if (stratum == dummy_stratum) | |
c8d104ad | 610 | internal_error (__FILE__, __LINE__, |
9b20d036 | 611 | _("Attempt to unpush the dummy target")); |
c8d104ad | 612 | |
a1740ee1 PA |
613 | /* Look for the specified target. Note that a target can only occur |
614 | once in the target stack. */ | |
c906108c | 615 | |
66b4deae | 616 | if (m_stack[stratum] != t) |
258b763a | 617 | { |
a1740ee1 PA |
618 | /* If T wasn't pushed, quit. Only open targets should be |
619 | closed. */ | |
620 | return false; | |
258b763a | 621 | } |
c906108c | 622 | |
c378eb4e | 623 | /* Unchain the target. */ |
66b4deae | 624 | m_stack[stratum] = NULL; |
a1740ee1 | 625 | |
66b4deae PA |
626 | if (m_top == stratum) |
627 | m_top = t->beneath ()->stratum (); | |
c906108c | 628 | |
5b6d1e4f PA |
629 | /* Finally close the target, if there are no inferiors |
630 | referencing this target still. Note we do this after unchaining, | |
631 | so any target method calls from within the target_close | |
632 | implementation don't end up in T anymore. Do leave the target | |
633 | open if we have are other inferiors referencing this target | |
634 | still. */ | |
635 | decref_target (t); | |
305436e0 | 636 | |
a1740ee1 | 637 | return true; |
c906108c SS |
638 | } |
639 | ||
915ef8b1 PA |
640 | /* Unpush TARGET and assert that it worked. */ |
641 | ||
642 | static void | |
643 | unpush_target_and_assert (struct target_ops *target) | |
644 | { | |
645 | if (!unpush_target (target)) | |
646 | { | |
647 | fprintf_unfiltered (gdb_stderr, | |
648 | "pop_all_targets couldn't find target %s\n", | |
f6ac5f3d | 649 | target->shortname ()); |
915ef8b1 PA |
650 | internal_error (__FILE__, __LINE__, |
651 | _("failed internal consistency check")); | |
652 | } | |
653 | } | |
654 | ||
aa76d38d | 655 | void |
460014f5 | 656 | pop_all_targets_above (enum strata above_stratum) |
aa76d38d | 657 | { |
66b4deae | 658 | while ((int) (current_top_target ()->stratum ()) > (int) above_stratum) |
8b88a78e | 659 | unpush_target_and_assert (current_top_target ()); |
915ef8b1 PA |
660 | } |
661 | ||
662 | /* See target.h. */ | |
663 | ||
664 | void | |
665 | pop_all_targets_at_and_above (enum strata stratum) | |
666 | { | |
66b4deae | 667 | while ((int) (current_top_target ()->stratum ()) >= (int) stratum) |
8b88a78e | 668 | unpush_target_and_assert (current_top_target ()); |
aa76d38d PA |
669 | } |
670 | ||
87ab71f0 | 671 | void |
460014f5 | 672 | pop_all_targets (void) |
87ab71f0 | 673 | { |
460014f5 | 674 | pop_all_targets_above (dummy_stratum); |
87ab71f0 PA |
675 | } |
676 | ||
5b6d1e4f PA |
677 | /* Return true if T is now pushed in the current inferior's target |
678 | stack. Return false otherwise. */ | |
c0edd9ed | 679 | |
5b6d1e4f PA |
680 | bool |
681 | target_is_pushed (target_ops *t) | |
c0edd9ed | 682 | { |
5b6d1e4f | 683 | return current_inferior ()->target_is_pushed (t); |
c0edd9ed JK |
684 | } |
685 | ||
f0f9ff95 TT |
686 | /* Default implementation of to_get_thread_local_address. */ |
687 | ||
688 | static void | |
689 | generic_tls_error (void) | |
690 | { | |
691 | throw_error (TLS_GENERIC_ERROR, | |
692 | _("Cannot find thread-local variables on this target")); | |
693 | } | |
694 | ||
72f5cf0e | 695 | /* Using the objfile specified in OBJFILE, find the address for the |
9e35dae4 DJ |
696 | current thread's thread-local storage with offset OFFSET. */ |
697 | CORE_ADDR | |
698 | target_translate_tls_address (struct objfile *objfile, CORE_ADDR offset) | |
699 | { | |
700 | volatile CORE_ADDR addr = 0; | |
8b88a78e | 701 | struct target_ops *target = current_top_target (); |
6e056c81 | 702 | struct gdbarch *gdbarch = target_gdbarch (); |
9e35dae4 | 703 | |
6e056c81 | 704 | if (gdbarch_fetch_tls_load_module_address_p (gdbarch)) |
9e35dae4 DJ |
705 | { |
706 | ptid_t ptid = inferior_ptid; | |
9e35dae4 | 707 | |
a70b8144 | 708 | try |
9e35dae4 DJ |
709 | { |
710 | CORE_ADDR lm_addr; | |
711 | ||
712 | /* Fetch the load module address for this objfile. */ | |
6e056c81 | 713 | lm_addr = gdbarch_fetch_tls_load_module_address (gdbarch, |
9e35dae4 | 714 | objfile); |
9e35dae4 | 715 | |
6e056c81 JB |
716 | if (gdbarch_get_thread_local_address_p (gdbarch)) |
717 | addr = gdbarch_get_thread_local_address (gdbarch, ptid, lm_addr, | |
718 | offset); | |
719 | else | |
720 | addr = target->get_thread_local_address (ptid, lm_addr, offset); | |
9e35dae4 DJ |
721 | } |
722 | /* If an error occurred, print TLS related messages here. Otherwise, | |
723 | throw the error to some higher catcher. */ | |
230d2906 | 724 | catch (const gdb_exception &ex) |
9e35dae4 DJ |
725 | { |
726 | int objfile_is_library = (objfile->flags & OBJF_SHARED); | |
727 | ||
728 | switch (ex.error) | |
729 | { | |
730 | case TLS_NO_LIBRARY_SUPPORT_ERROR: | |
3e43a32a MS |
731 | error (_("Cannot find thread-local variables " |
732 | "in this thread library.")); | |
9e35dae4 DJ |
733 | break; |
734 | case TLS_LOAD_MODULE_NOT_FOUND_ERROR: | |
735 | if (objfile_is_library) | |
736 | error (_("Cannot find shared library `%s' in dynamic" | |
4262abfb | 737 | " linker's load module list"), objfile_name (objfile)); |
9e35dae4 DJ |
738 | else |
739 | error (_("Cannot find executable file `%s' in dynamic" | |
4262abfb | 740 | " linker's load module list"), objfile_name (objfile)); |
9e35dae4 DJ |
741 | break; |
742 | case TLS_NOT_ALLOCATED_YET_ERROR: | |
743 | if (objfile_is_library) | |
744 | error (_("The inferior has not yet allocated storage for" | |
745 | " thread-local variables in\n" | |
746 | "the shared library `%s'\n" | |
747 | "for %s"), | |
a068643d TT |
748 | objfile_name (objfile), |
749 | target_pid_to_str (ptid).c_str ()); | |
9e35dae4 DJ |
750 | else |
751 | error (_("The inferior has not yet allocated storage for" | |
752 | " thread-local variables in\n" | |
753 | "the executable `%s'\n" | |
754 | "for %s"), | |
a068643d TT |
755 | objfile_name (objfile), |
756 | target_pid_to_str (ptid).c_str ()); | |
9e35dae4 DJ |
757 | break; |
758 | case TLS_GENERIC_ERROR: | |
759 | if (objfile_is_library) | |
760 | error (_("Cannot find thread-local storage for %s, " | |
761 | "shared library %s:\n%s"), | |
a068643d | 762 | target_pid_to_str (ptid).c_str (), |
3d6e9d23 | 763 | objfile_name (objfile), ex.what ()); |
9e35dae4 DJ |
764 | else |
765 | error (_("Cannot find thread-local storage for %s, " | |
766 | "executable file %s:\n%s"), | |
a068643d | 767 | target_pid_to_str (ptid).c_str (), |
3d6e9d23 | 768 | objfile_name (objfile), ex.what ()); |
9e35dae4 DJ |
769 | break; |
770 | default: | |
eedc3f4f | 771 | throw; |
9e35dae4 DJ |
772 | break; |
773 | } | |
774 | } | |
775 | } | |
9e35dae4 DJ |
776 | else |
777 | error (_("Cannot find thread-local variables on this target")); | |
778 | ||
779 | return addr; | |
780 | } | |
781 | ||
6be7b56e | 782 | const char * |
01cb8804 | 783 | target_xfer_status_to_string (enum target_xfer_status status) |
6be7b56e PA |
784 | { |
785 | #define CASE(X) case X: return #X | |
01cb8804 | 786 | switch (status) |
6be7b56e PA |
787 | { |
788 | CASE(TARGET_XFER_E_IO); | |
bc113b4e | 789 | CASE(TARGET_XFER_UNAVAILABLE); |
6be7b56e PA |
790 | default: |
791 | return "<unknown>"; | |
792 | } | |
793 | #undef CASE | |
794 | }; | |
795 | ||
796 | ||
66920317 | 797 | /* See target.h. */ |
c906108c | 798 | |
66920317 TT |
799 | gdb::unique_xmalloc_ptr<char> |
800 | target_read_string (CORE_ADDR memaddr, int len, int *bytes_read) | |
c906108c | 801 | { |
670e35fa | 802 | gdb::unique_xmalloc_ptr<gdb_byte> buffer; |
5d502164 | 803 | |
66920317 TT |
804 | int ignore; |
805 | if (bytes_read == nullptr) | |
806 | bytes_read = &ignore; | |
807 | ||
670e35fa TT |
808 | /* Note that the endian-ness does not matter here. */ |
809 | int errcode = read_string (memaddr, -1, 1, len, BFD_ENDIAN_LITTLE, | |
66920317 TT |
810 | &buffer, bytes_read); |
811 | if (errcode != 0) | |
812 | return {}; | |
670e35fa | 813 | |
66920317 | 814 | return gdb::unique_xmalloc_ptr<char> ((char *) buffer.release ()); |
c906108c SS |
815 | } |
816 | ||
07b82ea5 PA |
817 | struct target_section_table * |
818 | target_get_section_table (struct target_ops *target) | |
819 | { | |
f6ac5f3d | 820 | return target->get_section_table (); |
07b82ea5 PA |
821 | } |
822 | ||
8db32d44 | 823 | /* Find a section containing ADDR. */ |
07b82ea5 | 824 | |
0542c86d | 825 | struct target_section * |
8db32d44 AC |
826 | target_section_by_addr (struct target_ops *target, CORE_ADDR addr) |
827 | { | |
07b82ea5 | 828 | struct target_section_table *table = target_get_section_table (target); |
0542c86d | 829 | struct target_section *secp; |
07b82ea5 PA |
830 | |
831 | if (table == NULL) | |
832 | return NULL; | |
833 | ||
834 | for (secp = table->sections; secp < table->sections_end; secp++) | |
8db32d44 AC |
835 | { |
836 | if (addr >= secp->addr && addr < secp->endaddr) | |
837 | return secp; | |
838 | } | |
839 | return NULL; | |
840 | } | |
841 | ||
0fec99e8 PA |
842 | |
843 | /* Helper for the memory xfer routines. Checks the attributes of the | |
844 | memory region of MEMADDR against the read or write being attempted. | |
845 | If the access is permitted returns true, otherwise returns false. | |
846 | REGION_P is an optional output parameter. If not-NULL, it is | |
847 | filled with a pointer to the memory region of MEMADDR. REG_LEN | |
848 | returns LEN trimmed to the end of the region. This is how much the | |
849 | caller can continue requesting, if the access is permitted. A | |
850 | single xfer request must not straddle memory region boundaries. */ | |
851 | ||
852 | static int | |
853 | memory_xfer_check_region (gdb_byte *readbuf, const gdb_byte *writebuf, | |
854 | ULONGEST memaddr, ULONGEST len, ULONGEST *reg_len, | |
855 | struct mem_region **region_p) | |
856 | { | |
857 | struct mem_region *region; | |
858 | ||
859 | region = lookup_mem_region (memaddr); | |
860 | ||
861 | if (region_p != NULL) | |
862 | *region_p = region; | |
863 | ||
864 | switch (region->attrib.mode) | |
865 | { | |
866 | case MEM_RO: | |
867 | if (writebuf != NULL) | |
868 | return 0; | |
869 | break; | |
870 | ||
871 | case MEM_WO: | |
872 | if (readbuf != NULL) | |
873 | return 0; | |
874 | break; | |
875 | ||
876 | case MEM_FLASH: | |
877 | /* We only support writing to flash during "load" for now. */ | |
878 | if (writebuf != NULL) | |
879 | error (_("Writing to flash memory forbidden in this context")); | |
880 | break; | |
881 | ||
882 | case MEM_NONE: | |
883 | return 0; | |
884 | } | |
885 | ||
886 | /* region->hi == 0 means there's no upper bound. */ | |
887 | if (memaddr + len < region->hi || region->hi == 0) | |
888 | *reg_len = len; | |
889 | else | |
890 | *reg_len = region->hi - memaddr; | |
891 | ||
892 | return 1; | |
893 | } | |
894 | ||
9f713294 YQ |
895 | /* Read memory from more than one valid target. A core file, for |
896 | instance, could have some of memory but delegate other bits to | |
897 | the target below it. So, we must manually try all targets. */ | |
898 | ||
cc9f16aa | 899 | enum target_xfer_status |
17fde6d0 | 900 | raw_memory_xfer_partial (struct target_ops *ops, gdb_byte *readbuf, |
9b409511 YQ |
901 | const gdb_byte *writebuf, ULONGEST memaddr, LONGEST len, |
902 | ULONGEST *xfered_len) | |
9f713294 | 903 | { |
9b409511 | 904 | enum target_xfer_status res; |
9f713294 YQ |
905 | |
906 | do | |
907 | { | |
f6ac5f3d PA |
908 | res = ops->xfer_partial (TARGET_OBJECT_MEMORY, NULL, |
909 | readbuf, writebuf, memaddr, len, | |
910 | xfered_len); | |
9b409511 | 911 | if (res == TARGET_XFER_OK) |
9f713294 YQ |
912 | break; |
913 | ||
633785ff | 914 | /* Stop if the target reports that the memory is not available. */ |
bc113b4e | 915 | if (res == TARGET_XFER_UNAVAILABLE) |
633785ff MM |
916 | break; |
917 | ||
2735d421 KB |
918 | /* Don't continue past targets which have all the memory. |
919 | At one time, this code was necessary to read data from | |
920 | executables / shared libraries when data for the requested | |
921 | addresses weren't available in the core file. But now the | |
922 | core target handles this case itself. */ | |
f6ac5f3d | 923 | if (ops->has_all_memory ()) |
9f713294 YQ |
924 | break; |
925 | ||
b6a8c27b | 926 | ops = ops->beneath (); |
9f713294 YQ |
927 | } |
928 | while (ops != NULL); | |
929 | ||
0f26cec1 PA |
930 | /* The cache works at the raw memory level. Make sure the cache |
931 | gets updated with raw contents no matter what kind of memory | |
932 | object was originally being written. Note we do write-through | |
933 | first, so that if it fails, we don't write to the cache contents | |
934 | that never made it to the target. */ | |
935 | if (writebuf != NULL | |
d7e15655 | 936 | && inferior_ptid != null_ptid |
0f26cec1 PA |
937 | && target_dcache_init_p () |
938 | && (stack_cache_enabled_p () || code_cache_enabled_p ())) | |
939 | { | |
940 | DCACHE *dcache = target_dcache_get (); | |
941 | ||
942 | /* Note that writing to an area of memory which wasn't present | |
943 | in the cache doesn't cause it to be loaded in. */ | |
944 | dcache_update (dcache, res, memaddr, writebuf, *xfered_len); | |
945 | } | |
946 | ||
9f713294 YQ |
947 | return res; |
948 | } | |
949 | ||
7f79c47e DE |
950 | /* Perform a partial memory transfer. |
951 | For docs see target.h, to_xfer_partial. */ | |
cf7a04e8 | 952 | |
9b409511 | 953 | static enum target_xfer_status |
f0ba3972 | 954 | memory_xfer_partial_1 (struct target_ops *ops, enum target_object object, |
17fde6d0 | 955 | gdb_byte *readbuf, const gdb_byte *writebuf, ULONGEST memaddr, |
9b409511 | 956 | ULONGEST len, ULONGEST *xfered_len) |
0779438d | 957 | { |
9b409511 | 958 | enum target_xfer_status res; |
0fec99e8 | 959 | ULONGEST reg_len; |
cf7a04e8 | 960 | struct mem_region *region; |
4e5d721f | 961 | struct inferior *inf; |
cf7a04e8 | 962 | |
07b82ea5 PA |
963 | /* For accesses to unmapped overlay sections, read directly from |
964 | files. Must do this first, as MEMADDR may need adjustment. */ | |
965 | if (readbuf != NULL && overlay_debugging) | |
966 | { | |
967 | struct obj_section *section = find_pc_overlay (memaddr); | |
5d502164 | 968 | |
07b82ea5 PA |
969 | if (pc_in_unmapped_range (memaddr, section)) |
970 | { | |
971 | struct target_section_table *table | |
972 | = target_get_section_table (ops); | |
973 | const char *section_name = section->the_bfd_section->name; | |
5d502164 | 974 | |
07b82ea5 | 975 | memaddr = overlay_mapped_address (memaddr, section); |
e56cb451 KB |
976 | |
977 | auto match_cb = [=] (const struct target_section *s) | |
978 | { | |
979 | return (strcmp (section_name, s->the_bfd_section->name) == 0); | |
980 | }; | |
981 | ||
07b82ea5 | 982 | return section_table_xfer_memory_partial (readbuf, writebuf, |
9b409511 | 983 | memaddr, len, xfered_len, |
07b82ea5 PA |
984 | table->sections, |
985 | table->sections_end, | |
e56cb451 | 986 | match_cb); |
07b82ea5 PA |
987 | } |
988 | } | |
989 | ||
990 | /* Try the executable files, if "trust-readonly-sections" is set. */ | |
cf7a04e8 DJ |
991 | if (readbuf != NULL && trust_readonly) |
992 | { | |
0542c86d | 993 | struct target_section *secp; |
07b82ea5 | 994 | struct target_section_table *table; |
cf7a04e8 DJ |
995 | |
996 | secp = target_section_by_addr (ops, memaddr); | |
997 | if (secp != NULL | |
fd361982 | 998 | && (bfd_section_flags (secp->the_bfd_section) & SEC_READONLY)) |
07b82ea5 PA |
999 | { |
1000 | table = target_get_section_table (ops); | |
1001 | return section_table_xfer_memory_partial (readbuf, writebuf, | |
9b409511 | 1002 | memaddr, len, xfered_len, |
07b82ea5 | 1003 | table->sections, |
e56cb451 | 1004 | table->sections_end); |
07b82ea5 | 1005 | } |
98646950 UW |
1006 | } |
1007 | ||
cf7a04e8 | 1008 | /* Try GDB's internal data cache. */ |
cf7a04e8 | 1009 | |
0fec99e8 PA |
1010 | if (!memory_xfer_check_region (readbuf, writebuf, memaddr, len, ®_len, |
1011 | ®ion)) | |
1012 | return TARGET_XFER_E_IO; | |
cf7a04e8 | 1013 | |
d7e15655 | 1014 | if (inferior_ptid != null_ptid) |
00431a78 | 1015 | inf = current_inferior (); |
6c95b8df PA |
1016 | else |
1017 | inf = NULL; | |
4e5d721f DE |
1018 | |
1019 | if (inf != NULL | |
0f26cec1 | 1020 | && readbuf != NULL |
2f4d8875 PA |
1021 | /* The dcache reads whole cache lines; that doesn't play well |
1022 | with reading from a trace buffer, because reading outside of | |
1023 | the collected memory range fails. */ | |
1024 | && get_traceframe_number () == -1 | |
4e5d721f | 1025 | && (region->attrib.cache |
29453a14 YQ |
1026 | || (stack_cache_enabled_p () && object == TARGET_OBJECT_STACK_MEMORY) |
1027 | || (code_cache_enabled_p () && object == TARGET_OBJECT_CODE_MEMORY))) | |
cf7a04e8 | 1028 | { |
2a2f9fe4 YQ |
1029 | DCACHE *dcache = target_dcache_get_or_init (); |
1030 | ||
0f26cec1 PA |
1031 | return dcache_read_memory_partial (ops, dcache, memaddr, readbuf, |
1032 | reg_len, xfered_len); | |
cf7a04e8 DJ |
1033 | } |
1034 | ||
1035 | /* If none of those methods found the memory we wanted, fall back | |
1036 | to a target partial transfer. Normally a single call to | |
1037 | to_xfer_partial is enough; if it doesn't recognize an object | |
1038 | it will call the to_xfer_partial of the next target down. | |
1039 | But for memory this won't do. Memory is the only target | |
9b409511 YQ |
1040 | object which can be read from more than one valid target. |
1041 | A core file, for instance, could have some of memory but | |
1042 | delegate other bits to the target below it. So, we must | |
1043 | manually try all targets. */ | |
1044 | ||
1045 | res = raw_memory_xfer_partial (ops, readbuf, writebuf, memaddr, reg_len, | |
1046 | xfered_len); | |
cf7a04e8 DJ |
1047 | |
1048 | /* If we still haven't got anything, return the last error. We | |
1049 | give up. */ | |
1050 | return res; | |
0779438d AC |
1051 | } |
1052 | ||
f0ba3972 PA |
1053 | /* Perform a partial memory transfer. For docs see target.h, |
1054 | to_xfer_partial. */ | |
1055 | ||
9b409511 | 1056 | static enum target_xfer_status |
f0ba3972 | 1057 | memory_xfer_partial (struct target_ops *ops, enum target_object object, |
9b409511 YQ |
1058 | gdb_byte *readbuf, const gdb_byte *writebuf, |
1059 | ULONGEST memaddr, ULONGEST len, ULONGEST *xfered_len) | |
f0ba3972 | 1060 | { |
9b409511 | 1061 | enum target_xfer_status res; |
f0ba3972 PA |
1062 | |
1063 | /* Zero length requests are ok and require no work. */ | |
1064 | if (len == 0) | |
9b409511 | 1065 | return TARGET_XFER_EOF; |
f0ba3972 | 1066 | |
a738ea1d YQ |
1067 | memaddr = address_significant (target_gdbarch (), memaddr); |
1068 | ||
f0ba3972 PA |
1069 | /* Fill in READBUF with breakpoint shadows, or WRITEBUF with |
1070 | breakpoint insns, thus hiding out from higher layers whether | |
1071 | there are software breakpoints inserted in the code stream. */ | |
1072 | if (readbuf != NULL) | |
1073 | { | |
9b409511 YQ |
1074 | res = memory_xfer_partial_1 (ops, object, readbuf, NULL, memaddr, len, |
1075 | xfered_len); | |
f0ba3972 | 1076 | |
9b409511 | 1077 | if (res == TARGET_XFER_OK && !show_memory_breakpoints) |
c63528fc | 1078 | breakpoint_xfer_memory (readbuf, NULL, NULL, memaddr, *xfered_len); |
f0ba3972 PA |
1079 | } |
1080 | else | |
1081 | { | |
67c059c2 AB |
1082 | /* A large write request is likely to be partially satisfied |
1083 | by memory_xfer_partial_1. We will continually malloc | |
1084 | and free a copy of the entire write request for breakpoint | |
1085 | shadow handling even though we only end up writing a small | |
09c98b44 DB |
1086 | subset of it. Cap writes to a limit specified by the target |
1087 | to mitigate this. */ | |
f6ac5f3d | 1088 | len = std::min (ops->get_memory_xfer_limit (), len); |
67c059c2 | 1089 | |
26fcd5d7 TT |
1090 | gdb::byte_vector buf (writebuf, writebuf + len); |
1091 | breakpoint_xfer_memory (NULL, buf.data (), writebuf, memaddr, len); | |
1092 | res = memory_xfer_partial_1 (ops, object, NULL, buf.data (), memaddr, len, | |
9b409511 | 1093 | xfered_len); |
f0ba3972 PA |
1094 | } |
1095 | ||
1096 | return res; | |
1097 | } | |
1098 | ||
cb85b21b TT |
1099 | scoped_restore_tmpl<int> |
1100 | make_scoped_restore_show_memory_breakpoints (int show) | |
8defab1a | 1101 | { |
cb85b21b | 1102 | return make_scoped_restore (&show_memory_breakpoints, show); |
8defab1a DJ |
1103 | } |
1104 | ||
7f79c47e DE |
1105 | /* For docs see target.h, to_xfer_partial. */ |
1106 | ||
9b409511 | 1107 | enum target_xfer_status |
27394598 AC |
1108 | target_xfer_partial (struct target_ops *ops, |
1109 | enum target_object object, const char *annex, | |
4ac248ca | 1110 | gdb_byte *readbuf, const gdb_byte *writebuf, |
9b409511 YQ |
1111 | ULONGEST offset, ULONGEST len, |
1112 | ULONGEST *xfered_len) | |
27394598 | 1113 | { |
9b409511 | 1114 | enum target_xfer_status retval; |
27394598 | 1115 | |
ce6d0892 YQ |
1116 | /* Transfer is done when LEN is zero. */ |
1117 | if (len == 0) | |
9b409511 | 1118 | return TARGET_XFER_EOF; |
ce6d0892 | 1119 | |
d914c394 SS |
1120 | if (writebuf && !may_write_memory) |
1121 | error (_("Writing to memory is not allowed (addr %s, len %s)"), | |
1122 | core_addr_to_string_nz (offset), plongest (len)); | |
1123 | ||
9b409511 YQ |
1124 | *xfered_len = 0; |
1125 | ||
cf7a04e8 DJ |
1126 | /* If this is a memory transfer, let the memory-specific code |
1127 | have a look at it instead. Memory transfers are more | |
1128 | complicated. */ | |
29453a14 YQ |
1129 | if (object == TARGET_OBJECT_MEMORY || object == TARGET_OBJECT_STACK_MEMORY |
1130 | || object == TARGET_OBJECT_CODE_MEMORY) | |
4e5d721f | 1131 | retval = memory_xfer_partial (ops, object, readbuf, |
9b409511 | 1132 | writebuf, offset, len, xfered_len); |
9f713294 | 1133 | else if (object == TARGET_OBJECT_RAW_MEMORY) |
cf7a04e8 | 1134 | { |
0fec99e8 PA |
1135 | /* Skip/avoid accessing the target if the memory region |
1136 | attributes block the access. Check this here instead of in | |
1137 | raw_memory_xfer_partial as otherwise we'd end up checking | |
1138 | this twice in the case of the memory_xfer_partial path is | |
1139 | taken; once before checking the dcache, and another in the | |
1140 | tail call to raw_memory_xfer_partial. */ | |
1141 | if (!memory_xfer_check_region (readbuf, writebuf, offset, len, &len, | |
1142 | NULL)) | |
1143 | return TARGET_XFER_E_IO; | |
1144 | ||
9f713294 | 1145 | /* Request the normal memory object from other layers. */ |
9b409511 YQ |
1146 | retval = raw_memory_xfer_partial (ops, readbuf, writebuf, offset, len, |
1147 | xfered_len); | |
cf7a04e8 | 1148 | } |
9f713294 | 1149 | else |
f6ac5f3d PA |
1150 | retval = ops->xfer_partial (object, annex, readbuf, |
1151 | writebuf, offset, len, xfered_len); | |
cf7a04e8 | 1152 | |
27394598 AC |
1153 | if (targetdebug) |
1154 | { | |
1155 | const unsigned char *myaddr = NULL; | |
1156 | ||
1157 | fprintf_unfiltered (gdb_stdlog, | |
3e43a32a | 1158 | "%s:target_xfer_partial " |
9b409511 | 1159 | "(%d, %s, %s, %s, %s, %s) = %d, %s", |
f6ac5f3d | 1160 | ops->shortname (), |
27394598 AC |
1161 | (int) object, |
1162 | (annex ? annex : "(null)"), | |
53b71562 JB |
1163 | host_address_to_string (readbuf), |
1164 | host_address_to_string (writebuf), | |
0b1553bc | 1165 | core_addr_to_string_nz (offset), |
9b409511 YQ |
1166 | pulongest (len), retval, |
1167 | pulongest (*xfered_len)); | |
27394598 AC |
1168 | |
1169 | if (readbuf) | |
1170 | myaddr = readbuf; | |
1171 | if (writebuf) | |
1172 | myaddr = writebuf; | |
9b409511 | 1173 | if (retval == TARGET_XFER_OK && myaddr != NULL) |
27394598 AC |
1174 | { |
1175 | int i; | |
2bc416ba | 1176 | |
27394598 | 1177 | fputs_unfiltered (", bytes =", gdb_stdlog); |
9b409511 | 1178 | for (i = 0; i < *xfered_len; i++) |
27394598 | 1179 | { |
53b71562 | 1180 | if ((((intptr_t) &(myaddr[i])) & 0xf) == 0) |
27394598 AC |
1181 | { |
1182 | if (targetdebug < 2 && i > 0) | |
1183 | { | |
1184 | fprintf_unfiltered (gdb_stdlog, " ..."); | |
1185 | break; | |
1186 | } | |
1187 | fprintf_unfiltered (gdb_stdlog, "\n"); | |
1188 | } | |
2bc416ba | 1189 | |
27394598 AC |
1190 | fprintf_unfiltered (gdb_stdlog, " %02x", myaddr[i] & 0xff); |
1191 | } | |
1192 | } | |
2bc416ba | 1193 | |
27394598 AC |
1194 | fputc_unfiltered ('\n', gdb_stdlog); |
1195 | } | |
9b409511 YQ |
1196 | |
1197 | /* Check implementations of to_xfer_partial update *XFERED_LEN | |
1198 | properly. Do assertion after printing debug messages, so that we | |
1199 | can find more clues on assertion failure from debugging messages. */ | |
bc113b4e | 1200 | if (retval == TARGET_XFER_OK || retval == TARGET_XFER_UNAVAILABLE) |
9b409511 YQ |
1201 | gdb_assert (*xfered_len > 0); |
1202 | ||
27394598 AC |
1203 | return retval; |
1204 | } | |
1205 | ||
578d3588 PA |
1206 | /* Read LEN bytes of target memory at address MEMADDR, placing the |
1207 | results in GDB's memory at MYADDR. Returns either 0 for success or | |
d09f2c3f | 1208 | -1 if any error occurs. |
c906108c SS |
1209 | |
1210 | If an error occurs, no guarantee is made about the contents of the data at | |
1211 | MYADDR. In particular, the caller should not depend upon partial reads | |
1212 | filling the buffer with good data. There is no way for the caller to know | |
1213 | how much good data might have been transfered anyway. Callers that can | |
cf7a04e8 | 1214 | deal with partial reads should call target_read (which will retry until |
c378eb4e | 1215 | it makes no progress, and then return how much was transferred). */ |
c906108c SS |
1216 | |
1217 | int | |
1b162304 | 1218 | target_read_memory (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len) |
c906108c | 1219 | { |
8b88a78e | 1220 | if (target_read (current_top_target (), TARGET_OBJECT_MEMORY, NULL, |
cf7a04e8 DJ |
1221 | myaddr, memaddr, len) == len) |
1222 | return 0; | |
0779438d | 1223 | else |
d09f2c3f | 1224 | return -1; |
c906108c SS |
1225 | } |
1226 | ||
721ec300 GB |
1227 | /* See target/target.h. */ |
1228 | ||
1229 | int | |
1230 | target_read_uint32 (CORE_ADDR memaddr, uint32_t *result) | |
1231 | { | |
1232 | gdb_byte buf[4]; | |
1233 | int r; | |
1234 | ||
1235 | r = target_read_memory (memaddr, buf, sizeof buf); | |
1236 | if (r != 0) | |
1237 | return r; | |
1238 | *result = extract_unsigned_integer (buf, sizeof buf, | |
1239 | gdbarch_byte_order (target_gdbarch ())); | |
1240 | return 0; | |
1241 | } | |
1242 | ||
aee4bf85 PA |
1243 | /* Like target_read_memory, but specify explicitly that this is a read |
1244 | from the target's raw memory. That is, this read bypasses the | |
1245 | dcache, breakpoint shadowing, etc. */ | |
1246 | ||
1247 | int | |
1248 | target_read_raw_memory (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len) | |
1249 | { | |
8b88a78e | 1250 | if (target_read (current_top_target (), TARGET_OBJECT_RAW_MEMORY, NULL, |
aee4bf85 PA |
1251 | myaddr, memaddr, len) == len) |
1252 | return 0; | |
1253 | else | |
d09f2c3f | 1254 | return -1; |
aee4bf85 PA |
1255 | } |
1256 | ||
4e5d721f DE |
1257 | /* Like target_read_memory, but specify explicitly that this is a read from |
1258 | the target's stack. This may trigger different cache behavior. */ | |
1259 | ||
1260 | int | |
45aa4659 | 1261 | target_read_stack (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len) |
4e5d721f | 1262 | { |
8b88a78e | 1263 | if (target_read (current_top_target (), TARGET_OBJECT_STACK_MEMORY, NULL, |
4e5d721f DE |
1264 | myaddr, memaddr, len) == len) |
1265 | return 0; | |
1266 | else | |
d09f2c3f | 1267 | return -1; |
4e5d721f DE |
1268 | } |
1269 | ||
29453a14 YQ |
1270 | /* Like target_read_memory, but specify explicitly that this is a read from |
1271 | the target's code. This may trigger different cache behavior. */ | |
1272 | ||
1273 | int | |
1274 | target_read_code (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len) | |
1275 | { | |
8b88a78e | 1276 | if (target_read (current_top_target (), TARGET_OBJECT_CODE_MEMORY, NULL, |
29453a14 YQ |
1277 | myaddr, memaddr, len) == len) |
1278 | return 0; | |
1279 | else | |
d09f2c3f | 1280 | return -1; |
29453a14 YQ |
1281 | } |
1282 | ||
7f79c47e | 1283 | /* Write LEN bytes from MYADDR to target memory at address MEMADDR. |
d09f2c3f PA |
1284 | Returns either 0 for success or -1 if any error occurs. If an |
1285 | error occurs, no guarantee is made about how much data got written. | |
1286 | Callers that can deal with partial writes should call | |
1287 | target_write. */ | |
7f79c47e | 1288 | |
c906108c | 1289 | int |
45aa4659 | 1290 | target_write_memory (CORE_ADDR memaddr, const gdb_byte *myaddr, ssize_t len) |
c906108c | 1291 | { |
8b88a78e | 1292 | if (target_write (current_top_target (), TARGET_OBJECT_MEMORY, NULL, |
cf7a04e8 DJ |
1293 | myaddr, memaddr, len) == len) |
1294 | return 0; | |
0779438d | 1295 | else |
d09f2c3f | 1296 | return -1; |
c906108c | 1297 | } |
c5aa993b | 1298 | |
f0ba3972 | 1299 | /* Write LEN bytes from MYADDR to target raw memory at address |
d09f2c3f PA |
1300 | MEMADDR. Returns either 0 for success or -1 if any error occurs. |
1301 | If an error occurs, no guarantee is made about how much data got | |
1302 | written. Callers that can deal with partial writes should call | |
1303 | target_write. */ | |
f0ba3972 PA |
1304 | |
1305 | int | |
45aa4659 | 1306 | target_write_raw_memory (CORE_ADDR memaddr, const gdb_byte *myaddr, ssize_t len) |
f0ba3972 | 1307 | { |
8b88a78e | 1308 | if (target_write (current_top_target (), TARGET_OBJECT_RAW_MEMORY, NULL, |
f0ba3972 PA |
1309 | myaddr, memaddr, len) == len) |
1310 | return 0; | |
1311 | else | |
d09f2c3f | 1312 | return -1; |
f0ba3972 PA |
1313 | } |
1314 | ||
fd79ecee DJ |
1315 | /* Fetch the target's memory map. */ |
1316 | ||
a664f67e | 1317 | std::vector<mem_region> |
fd79ecee DJ |
1318 | target_memory_map (void) |
1319 | { | |
8b88a78e | 1320 | std::vector<mem_region> result = current_top_target ()->memory_map (); |
a664f67e SM |
1321 | if (result.empty ()) |
1322 | return result; | |
fd79ecee | 1323 | |
a664f67e | 1324 | std::sort (result.begin (), result.end ()); |
fd79ecee DJ |
1325 | |
1326 | /* Check that regions do not overlap. Simultaneously assign | |
1327 | a numbering for the "mem" commands to use to refer to | |
1328 | each region. */ | |
a664f67e SM |
1329 | mem_region *last_one = NULL; |
1330 | for (size_t ix = 0; ix < result.size (); ix++) | |
fd79ecee | 1331 | { |
a664f67e | 1332 | mem_region *this_one = &result[ix]; |
fd79ecee DJ |
1333 | this_one->number = ix; |
1334 | ||
a664f67e | 1335 | if (last_one != NULL && last_one->hi > this_one->lo) |
fd79ecee DJ |
1336 | { |
1337 | warning (_("Overlapping regions in memory map: ignoring")); | |
a664f67e | 1338 | return std::vector<mem_region> (); |
fd79ecee | 1339 | } |
a664f67e | 1340 | |
fd79ecee DJ |
1341 | last_one = this_one; |
1342 | } | |
1343 | ||
1344 | return result; | |
1345 | } | |
1346 | ||
a76d924d DJ |
1347 | void |
1348 | target_flash_erase (ULONGEST address, LONGEST length) | |
1349 | { | |
8b88a78e | 1350 | current_top_target ()->flash_erase (address, length); |
a76d924d DJ |
1351 | } |
1352 | ||
1353 | void | |
1354 | target_flash_done (void) | |
1355 | { | |
8b88a78e | 1356 | current_top_target ()->flash_done (); |
a76d924d DJ |
1357 | } |
1358 | ||
920d2a44 AC |
1359 | static void |
1360 | show_trust_readonly (struct ui_file *file, int from_tty, | |
1361 | struct cmd_list_element *c, const char *value) | |
1362 | { | |
3e43a32a MS |
1363 | fprintf_filtered (file, |
1364 | _("Mode for reading from readonly sections is %s.\n"), | |
920d2a44 AC |
1365 | value); |
1366 | } | |
3a11626d | 1367 | |
7f79c47e | 1368 | /* Target vector read/write partial wrapper functions. */ |
0088c768 | 1369 | |
9b409511 | 1370 | static enum target_xfer_status |
1e3ff5ad AC |
1371 | target_read_partial (struct target_ops *ops, |
1372 | enum target_object object, | |
1b0ba102 | 1373 | const char *annex, gdb_byte *buf, |
9b409511 YQ |
1374 | ULONGEST offset, ULONGEST len, |
1375 | ULONGEST *xfered_len) | |
1e3ff5ad | 1376 | { |
9b409511 YQ |
1377 | return target_xfer_partial (ops, object, annex, buf, NULL, offset, len, |
1378 | xfered_len); | |
1e3ff5ad AC |
1379 | } |
1380 | ||
8a55ffb0 | 1381 | static enum target_xfer_status |
1e3ff5ad AC |
1382 | target_write_partial (struct target_ops *ops, |
1383 | enum target_object object, | |
1b0ba102 | 1384 | const char *annex, const gdb_byte *buf, |
9b409511 | 1385 | ULONGEST offset, LONGEST len, ULONGEST *xfered_len) |
1e3ff5ad | 1386 | { |
9b409511 YQ |
1387 | return target_xfer_partial (ops, object, annex, NULL, buf, offset, len, |
1388 | xfered_len); | |
1e3ff5ad AC |
1389 | } |
1390 | ||
1391 | /* Wrappers to perform the full transfer. */ | |
7f79c47e DE |
1392 | |
1393 | /* For docs on target_read see target.h. */ | |
1394 | ||
1e3ff5ad AC |
1395 | LONGEST |
1396 | target_read (struct target_ops *ops, | |
1397 | enum target_object object, | |
1b0ba102 | 1398 | const char *annex, gdb_byte *buf, |
1e3ff5ad AC |
1399 | ULONGEST offset, LONGEST len) |
1400 | { | |
279a6fed | 1401 | LONGEST xfered_total = 0; |
d309493c SM |
1402 | int unit_size = 1; |
1403 | ||
1404 | /* If we are reading from a memory object, find the length of an addressable | |
1405 | unit for that architecture. */ | |
1406 | if (object == TARGET_OBJECT_MEMORY | |
1407 | || object == TARGET_OBJECT_STACK_MEMORY | |
1408 | || object == TARGET_OBJECT_CODE_MEMORY | |
1409 | || object == TARGET_OBJECT_RAW_MEMORY) | |
1410 | unit_size = gdbarch_addressable_memory_unit_size (target_gdbarch ()); | |
5d502164 | 1411 | |
279a6fed | 1412 | while (xfered_total < len) |
1e3ff5ad | 1413 | { |
279a6fed | 1414 | ULONGEST xfered_partial; |
9b409511 YQ |
1415 | enum target_xfer_status status; |
1416 | ||
1417 | status = target_read_partial (ops, object, annex, | |
d309493c | 1418 | buf + xfered_total * unit_size, |
279a6fed SM |
1419 | offset + xfered_total, len - xfered_total, |
1420 | &xfered_partial); | |
5d502164 | 1421 | |
1e3ff5ad | 1422 | /* Call an observer, notifying them of the xfer progress? */ |
9b409511 | 1423 | if (status == TARGET_XFER_EOF) |
279a6fed | 1424 | return xfered_total; |
9b409511 YQ |
1425 | else if (status == TARGET_XFER_OK) |
1426 | { | |
279a6fed | 1427 | xfered_total += xfered_partial; |
9b409511 YQ |
1428 | QUIT; |
1429 | } | |
1430 | else | |
279a6fed | 1431 | return TARGET_XFER_E_IO; |
9b409511 | 1432 | |
1e3ff5ad AC |
1433 | } |
1434 | return len; | |
1435 | } | |
1436 | ||
f1a507a1 JB |
1437 | /* Assuming that the entire [begin, end) range of memory cannot be |
1438 | read, try to read whatever subrange is possible to read. | |
1439 | ||
1440 | The function returns, in RESULT, either zero or one memory block. | |
1441 | If there's a readable subrange at the beginning, it is completely | |
1442 | read and returned. Any further readable subrange will not be read. | |
1443 | Otherwise, if there's a readable subrange at the end, it will be | |
1444 | completely read and returned. Any readable subranges before it | |
1445 | (obviously, not starting at the beginning), will be ignored. In | |
1446 | other cases -- either no readable subrange, or readable subrange(s) | |
1447 | that is neither at the beginning, or end, nothing is returned. | |
1448 | ||
1449 | The purpose of this function is to handle a read across a boundary | |
1450 | of accessible memory in a case when memory map is not available. | |
1451 | The above restrictions are fine for this case, but will give | |
1452 | incorrect results if the memory is 'patchy'. However, supporting | |
1453 | 'patchy' memory would require trying to read every single byte, | |
1454 | and it seems unacceptable solution. Explicit memory map is | |
1455 | recommended for this case -- and target_read_memory_robust will | |
1456 | take care of reading multiple ranges then. */ | |
8dedea02 VP |
1457 | |
1458 | static void | |
3e43a32a | 1459 | read_whatever_is_readable (struct target_ops *ops, |
279a6fed | 1460 | const ULONGEST begin, const ULONGEST end, |
d309493c | 1461 | int unit_size, |
386c8614 | 1462 | std::vector<memory_read_result> *result) |
d5086790 | 1463 | { |
8dedea02 VP |
1464 | ULONGEST current_begin = begin; |
1465 | ULONGEST current_end = end; | |
1466 | int forward; | |
9b409511 | 1467 | ULONGEST xfered_len; |
8dedea02 VP |
1468 | |
1469 | /* If we previously failed to read 1 byte, nothing can be done here. */ | |
1470 | if (end - begin <= 1) | |
386c8614 TT |
1471 | return; |
1472 | ||
1473 | gdb::unique_xmalloc_ptr<gdb_byte> buf ((gdb_byte *) xmalloc (end - begin)); | |
8dedea02 VP |
1474 | |
1475 | /* Check that either first or the last byte is readable, and give up | |
c378eb4e | 1476 | if not. This heuristic is meant to permit reading accessible memory |
8dedea02 VP |
1477 | at the boundary of accessible region. */ |
1478 | if (target_read_partial (ops, TARGET_OBJECT_MEMORY, NULL, | |
386c8614 | 1479 | buf.get (), begin, 1, &xfered_len) == TARGET_XFER_OK) |
8dedea02 VP |
1480 | { |
1481 | forward = 1; | |
1482 | ++current_begin; | |
1483 | } | |
1484 | else if (target_read_partial (ops, TARGET_OBJECT_MEMORY, NULL, | |
386c8614 | 1485 | buf.get () + (end - begin) - 1, end - 1, 1, |
9b409511 | 1486 | &xfered_len) == TARGET_XFER_OK) |
8dedea02 VP |
1487 | { |
1488 | forward = 0; | |
1489 | --current_end; | |
1490 | } | |
1491 | else | |
386c8614 | 1492 | return; |
8dedea02 VP |
1493 | |
1494 | /* Loop invariant is that the [current_begin, current_end) was previously | |
1495 | found to be not readable as a whole. | |
1496 | ||
1497 | Note loop condition -- if the range has 1 byte, we can't divide the range | |
1498 | so there's no point trying further. */ | |
1499 | while (current_end - current_begin > 1) | |
1500 | { | |
1501 | ULONGEST first_half_begin, first_half_end; | |
1502 | ULONGEST second_half_begin, second_half_end; | |
1503 | LONGEST xfer; | |
279a6fed | 1504 | ULONGEST middle = current_begin + (current_end - current_begin) / 2; |
f1a507a1 | 1505 | |
8dedea02 VP |
1506 | if (forward) |
1507 | { | |
1508 | first_half_begin = current_begin; | |
1509 | first_half_end = middle; | |
1510 | second_half_begin = middle; | |
1511 | second_half_end = current_end; | |
1512 | } | |
1513 | else | |
1514 | { | |
1515 | first_half_begin = middle; | |
1516 | first_half_end = current_end; | |
1517 | second_half_begin = current_begin; | |
1518 | second_half_end = middle; | |
1519 | } | |
1520 | ||
1521 | xfer = target_read (ops, TARGET_OBJECT_MEMORY, NULL, | |
386c8614 | 1522 | buf.get () + (first_half_begin - begin) * unit_size, |
8dedea02 VP |
1523 | first_half_begin, |
1524 | first_half_end - first_half_begin); | |
1525 | ||
1526 | if (xfer == first_half_end - first_half_begin) | |
1527 | { | |
c378eb4e | 1528 | /* This half reads up fine. So, the error must be in the |
3e43a32a | 1529 | other half. */ |
8dedea02 VP |
1530 | current_begin = second_half_begin; |
1531 | current_end = second_half_end; | |
1532 | } | |
1533 | else | |
1534 | { | |
c378eb4e | 1535 | /* This half is not readable. Because we've tried one byte, we |
279a6fed | 1536 | know some part of this half if actually readable. Go to the next |
8dedea02 VP |
1537 | iteration to divide again and try to read. |
1538 | ||
1539 | We don't handle the other half, because this function only tries | |
1540 | to read a single readable subrange. */ | |
1541 | current_begin = first_half_begin; | |
1542 | current_end = first_half_end; | |
1543 | } | |
1544 | } | |
1545 | ||
1546 | if (forward) | |
1547 | { | |
1548 | /* The [begin, current_begin) range has been read. */ | |
386c8614 | 1549 | result->emplace_back (begin, current_end, std::move (buf)); |
8dedea02 VP |
1550 | } |
1551 | else | |
1552 | { | |
1553 | /* The [current_end, end) range has been read. */ | |
279a6fed | 1554 | LONGEST region_len = end - current_end; |
f1a507a1 | 1555 | |
386c8614 TT |
1556 | gdb::unique_xmalloc_ptr<gdb_byte> data |
1557 | ((gdb_byte *) xmalloc (region_len * unit_size)); | |
1558 | memcpy (data.get (), buf.get () + (current_end - begin) * unit_size, | |
d309493c | 1559 | region_len * unit_size); |
386c8614 | 1560 | result->emplace_back (current_end, end, std::move (data)); |
8dedea02 | 1561 | } |
8dedea02 VP |
1562 | } |
1563 | ||
386c8614 | 1564 | std::vector<memory_read_result> |
279a6fed SM |
1565 | read_memory_robust (struct target_ops *ops, |
1566 | const ULONGEST offset, const LONGEST len) | |
8dedea02 | 1567 | { |
386c8614 | 1568 | std::vector<memory_read_result> result; |
d309493c | 1569 | int unit_size = gdbarch_addressable_memory_unit_size (target_gdbarch ()); |
8dedea02 | 1570 | |
279a6fed SM |
1571 | LONGEST xfered_total = 0; |
1572 | while (xfered_total < len) | |
d5086790 | 1573 | { |
279a6fed SM |
1574 | struct mem_region *region = lookup_mem_region (offset + xfered_total); |
1575 | LONGEST region_len; | |
5d502164 | 1576 | |
8dedea02 VP |
1577 | /* If there is no explicit region, a fake one should be created. */ |
1578 | gdb_assert (region); | |
1579 | ||
1580 | if (region->hi == 0) | |
279a6fed | 1581 | region_len = len - xfered_total; |
8dedea02 | 1582 | else |
279a6fed | 1583 | region_len = region->hi - offset; |
8dedea02 VP |
1584 | |
1585 | if (region->attrib.mode == MEM_NONE || region->attrib.mode == MEM_WO) | |
d5086790 | 1586 | { |
c378eb4e | 1587 | /* Cannot read this region. Note that we can end up here only |
8dedea02 VP |
1588 | if the region is explicitly marked inaccessible, or |
1589 | 'inaccessible-by-default' is in effect. */ | |
279a6fed | 1590 | xfered_total += region_len; |
8dedea02 VP |
1591 | } |
1592 | else | |
1593 | { | |
325fac50 | 1594 | LONGEST to_read = std::min (len - xfered_total, region_len); |
386c8614 TT |
1595 | gdb::unique_xmalloc_ptr<gdb_byte> buffer |
1596 | ((gdb_byte *) xmalloc (to_read * unit_size)); | |
8dedea02 | 1597 | |
279a6fed | 1598 | LONGEST xfered_partial = |
386c8614 | 1599 | target_read (ops, TARGET_OBJECT_MEMORY, NULL, buffer.get (), |
279a6fed | 1600 | offset + xfered_total, to_read); |
8dedea02 | 1601 | /* Call an observer, notifying them of the xfer progress? */ |
279a6fed | 1602 | if (xfered_partial <= 0) |
d5086790 | 1603 | { |
c378eb4e | 1604 | /* Got an error reading full chunk. See if maybe we can read |
8dedea02 | 1605 | some subrange. */ |
e084c964 DB |
1606 | read_whatever_is_readable (ops, offset + xfered_total, |
1607 | offset + xfered_total + to_read, | |
1608 | unit_size, &result); | |
279a6fed | 1609 | xfered_total += to_read; |
d5086790 | 1610 | } |
8dedea02 VP |
1611 | else |
1612 | { | |
386c8614 TT |
1613 | result.emplace_back (offset + xfered_total, |
1614 | offset + xfered_total + xfered_partial, | |
1615 | std::move (buffer)); | |
279a6fed | 1616 | xfered_total += xfered_partial; |
8dedea02 VP |
1617 | } |
1618 | QUIT; | |
d5086790 | 1619 | } |
d5086790 | 1620 | } |
9d78f827 | 1621 | |
8dedea02 | 1622 | return result; |
d5086790 VP |
1623 | } |
1624 | ||
8dedea02 | 1625 | |
cf7a04e8 DJ |
1626 | /* An alternative to target_write with progress callbacks. */ |
1627 | ||
1e3ff5ad | 1628 | LONGEST |
cf7a04e8 DJ |
1629 | target_write_with_progress (struct target_ops *ops, |
1630 | enum target_object object, | |
1631 | const char *annex, const gdb_byte *buf, | |
1632 | ULONGEST offset, LONGEST len, | |
1633 | void (*progress) (ULONGEST, void *), void *baton) | |
1e3ff5ad | 1634 | { |
279a6fed | 1635 | LONGEST xfered_total = 0; |
d309493c SM |
1636 | int unit_size = 1; |
1637 | ||
1638 | /* If we are writing to a memory object, find the length of an addressable | |
1639 | unit for that architecture. */ | |
1640 | if (object == TARGET_OBJECT_MEMORY | |
1641 | || object == TARGET_OBJECT_STACK_MEMORY | |
1642 | || object == TARGET_OBJECT_CODE_MEMORY | |
1643 | || object == TARGET_OBJECT_RAW_MEMORY) | |
1644 | unit_size = gdbarch_addressable_memory_unit_size (target_gdbarch ()); | |
a76d924d DJ |
1645 | |
1646 | /* Give the progress callback a chance to set up. */ | |
1647 | if (progress) | |
1648 | (*progress) (0, baton); | |
1649 | ||
279a6fed | 1650 | while (xfered_total < len) |
1e3ff5ad | 1651 | { |
279a6fed | 1652 | ULONGEST xfered_partial; |
9b409511 YQ |
1653 | enum target_xfer_status status; |
1654 | ||
1655 | status = target_write_partial (ops, object, annex, | |
d309493c | 1656 | buf + xfered_total * unit_size, |
279a6fed SM |
1657 | offset + xfered_total, len - xfered_total, |
1658 | &xfered_partial); | |
cf7a04e8 | 1659 | |
5c328c05 | 1660 | if (status != TARGET_XFER_OK) |
279a6fed | 1661 | return status == TARGET_XFER_EOF ? xfered_total : TARGET_XFER_E_IO; |
cf7a04e8 DJ |
1662 | |
1663 | if (progress) | |
279a6fed | 1664 | (*progress) (xfered_partial, baton); |
cf7a04e8 | 1665 | |
279a6fed | 1666 | xfered_total += xfered_partial; |
1e3ff5ad AC |
1667 | QUIT; |
1668 | } | |
1669 | return len; | |
1670 | } | |
1671 | ||
7f79c47e DE |
1672 | /* For docs on target_write see target.h. */ |
1673 | ||
cf7a04e8 DJ |
1674 | LONGEST |
1675 | target_write (struct target_ops *ops, | |
1676 | enum target_object object, | |
1677 | const char *annex, const gdb_byte *buf, | |
1678 | ULONGEST offset, LONGEST len) | |
1679 | { | |
1680 | return target_write_with_progress (ops, object, annex, buf, offset, len, | |
1681 | NULL, NULL); | |
1682 | } | |
1683 | ||
9018be22 SM |
1684 | /* Help for target_read_alloc and target_read_stralloc. See their comments |
1685 | for details. */ | |
13547ab6 | 1686 | |
9018be22 SM |
1687 | template <typename T> |
1688 | gdb::optional<gdb::def_vector<T>> | |
159f81f3 | 1689 | target_read_alloc_1 (struct target_ops *ops, enum target_object object, |
9018be22 | 1690 | const char *annex) |
13547ab6 | 1691 | { |
9018be22 SM |
1692 | gdb::def_vector<T> buf; |
1693 | size_t buf_pos = 0; | |
1694 | const int chunk = 4096; | |
13547ab6 DJ |
1695 | |
1696 | /* This function does not have a length parameter; it reads the | |
1697 | entire OBJECT). Also, it doesn't support objects fetched partly | |
1698 | from one target and partly from another (in a different stratum, | |
1699 | e.g. a core file and an executable). Both reasons make it | |
1700 | unsuitable for reading memory. */ | |
1701 | gdb_assert (object != TARGET_OBJECT_MEMORY); | |
1702 | ||
1703 | /* Start by reading up to 4K at a time. The target will throttle | |
1704 | this number down if necessary. */ | |
13547ab6 DJ |
1705 | while (1) |
1706 | { | |
9b409511 YQ |
1707 | ULONGEST xfered_len; |
1708 | enum target_xfer_status status; | |
1709 | ||
9018be22 SM |
1710 | buf.resize (buf_pos + chunk); |
1711 | ||
1712 | status = target_read_partial (ops, object, annex, | |
1713 | (gdb_byte *) &buf[buf_pos], | |
1714 | buf_pos, chunk, | |
9b409511 YQ |
1715 | &xfered_len); |
1716 | ||
1717 | if (status == TARGET_XFER_EOF) | |
13547ab6 DJ |
1718 | { |
1719 | /* Read all there was. */ | |
9018be22 SM |
1720 | buf.resize (buf_pos); |
1721 | return buf; | |
13547ab6 | 1722 | } |
9b409511 YQ |
1723 | else if (status != TARGET_XFER_OK) |
1724 | { | |
1725 | /* An error occurred. */ | |
9018be22 | 1726 | return {}; |
9b409511 | 1727 | } |
13547ab6 | 1728 | |
9b409511 | 1729 | buf_pos += xfered_len; |
13547ab6 | 1730 | |
13547ab6 DJ |
1731 | QUIT; |
1732 | } | |
1733 | } | |
1734 | ||
9018be22 | 1735 | /* See target.h */ |
159f81f3 | 1736 | |
9018be22 | 1737 | gdb::optional<gdb::byte_vector> |
159f81f3 | 1738 | target_read_alloc (struct target_ops *ops, enum target_object object, |
9018be22 | 1739 | const char *annex) |
159f81f3 | 1740 | { |
9018be22 | 1741 | return target_read_alloc_1<gdb_byte> (ops, object, annex); |
159f81f3 DJ |
1742 | } |
1743 | ||
b7b030ad | 1744 | /* See target.h. */ |
159f81f3 | 1745 | |
9018be22 | 1746 | gdb::optional<gdb::char_vector> |
159f81f3 DJ |
1747 | target_read_stralloc (struct target_ops *ops, enum target_object object, |
1748 | const char *annex) | |
1749 | { | |
9018be22 SM |
1750 | gdb::optional<gdb::char_vector> buf |
1751 | = target_read_alloc_1<char> (ops, object, annex); | |
159f81f3 | 1752 | |
9018be22 SM |
1753 | if (!buf) |
1754 | return {}; | |
159f81f3 | 1755 | |
d00a27c5 | 1756 | if (buf->empty () || buf->back () != '\0') |
9018be22 | 1757 | buf->push_back ('\0'); |
7313baad UW |
1758 | |
1759 | /* Check for embedded NUL bytes; but allow trailing NULs. */ | |
9018be22 SM |
1760 | for (auto it = std::find (buf->begin (), buf->end (), '\0'); |
1761 | it != buf->end (); it++) | |
1762 | if (*it != '\0') | |
7313baad UW |
1763 | { |
1764 | warning (_("target object %d, annex %s, " | |
1765 | "contained unexpected null characters"), | |
1766 | (int) object, annex ? annex : "(none)"); | |
1767 | break; | |
1768 | } | |
159f81f3 | 1769 | |
9018be22 | 1770 | return buf; |
159f81f3 DJ |
1771 | } |
1772 | ||
b6591e8b AC |
1773 | /* Memory transfer methods. */ |
1774 | ||
1775 | void | |
1b0ba102 | 1776 | get_target_memory (struct target_ops *ops, CORE_ADDR addr, gdb_byte *buf, |
b6591e8b AC |
1777 | LONGEST len) |
1778 | { | |
07b82ea5 PA |
1779 | /* This method is used to read from an alternate, non-current |
1780 | target. This read must bypass the overlay support (as symbols | |
1781 | don't match this target), and GDB's internal cache (wrong cache | |
1782 | for this target). */ | |
1783 | if (target_read (ops, TARGET_OBJECT_RAW_MEMORY, NULL, buf, addr, len) | |
b6591e8b | 1784 | != len) |
578d3588 | 1785 | memory_error (TARGET_XFER_E_IO, addr); |
b6591e8b AC |
1786 | } |
1787 | ||
1788 | ULONGEST | |
5d502164 MS |
1789 | get_target_memory_unsigned (struct target_ops *ops, CORE_ADDR addr, |
1790 | int len, enum bfd_endian byte_order) | |
b6591e8b | 1791 | { |
f6519ebc | 1792 | gdb_byte buf[sizeof (ULONGEST)]; |
b6591e8b AC |
1793 | |
1794 | gdb_assert (len <= sizeof (buf)); | |
1795 | get_target_memory (ops, addr, buf, len); | |
e17a4113 | 1796 | return extract_unsigned_integer (buf, len, byte_order); |
b6591e8b AC |
1797 | } |
1798 | ||
3db08215 MM |
1799 | /* See target.h. */ |
1800 | ||
d914c394 SS |
1801 | int |
1802 | target_insert_breakpoint (struct gdbarch *gdbarch, | |
1803 | struct bp_target_info *bp_tgt) | |
1804 | { | |
1805 | if (!may_insert_breakpoints) | |
1806 | { | |
1807 | warning (_("May not insert breakpoints")); | |
1808 | return 1; | |
1809 | } | |
1810 | ||
8b88a78e | 1811 | return current_top_target ()->insert_breakpoint (gdbarch, bp_tgt); |
d914c394 SS |
1812 | } |
1813 | ||
3db08215 MM |
1814 | /* See target.h. */ |
1815 | ||
d914c394 | 1816 | int |
6b84065d | 1817 | target_remove_breakpoint (struct gdbarch *gdbarch, |
73971819 PA |
1818 | struct bp_target_info *bp_tgt, |
1819 | enum remove_bp_reason reason) | |
d914c394 SS |
1820 | { |
1821 | /* This is kind of a weird case to handle, but the permission might | |
1822 | have been changed after breakpoints were inserted - in which case | |
1823 | we should just take the user literally and assume that any | |
1824 | breakpoints should be left in place. */ | |
1825 | if (!may_insert_breakpoints) | |
1826 | { | |
1827 | warning (_("May not remove breakpoints")); | |
1828 | return 1; | |
1829 | } | |
1830 | ||
8b88a78e | 1831 | return current_top_target ()->remove_breakpoint (gdbarch, bp_tgt, reason); |
d914c394 SS |
1832 | } |
1833 | ||
c906108c | 1834 | static void |
1d12d88f | 1835 | info_target_command (const char *args, int from_tty) |
c906108c | 1836 | { |
c906108c | 1837 | int has_all_mem = 0; |
c5aa993b | 1838 | |
c906108c | 1839 | if (symfile_objfile != NULL) |
4262abfb JK |
1840 | printf_unfiltered (_("Symbols from \"%s\".\n"), |
1841 | objfile_name (symfile_objfile)); | |
c906108c | 1842 | |
b6a8c27b | 1843 | for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
c906108c | 1844 | { |
f6ac5f3d | 1845 | if (!t->has_memory ()) |
c906108c SS |
1846 | continue; |
1847 | ||
66b4deae | 1848 | if ((int) (t->stratum ()) <= (int) dummy_stratum) |
c906108c SS |
1849 | continue; |
1850 | if (has_all_mem) | |
3e43a32a MS |
1851 | printf_unfiltered (_("\tWhile running this, " |
1852 | "GDB does not access memory from...\n")); | |
f6ac5f3d PA |
1853 | printf_unfiltered ("%s:\n", t->longname ()); |
1854 | t->files_info (); | |
1855 | has_all_mem = t->has_all_memory (); | |
c906108c SS |
1856 | } |
1857 | } | |
1858 | ||
fd79ecee DJ |
1859 | /* This function is called before any new inferior is created, e.g. |
1860 | by running a program, attaching, or connecting to a target. | |
1861 | It cleans up any state from previous invocations which might | |
1862 | change between runs. This is a subset of what target_preopen | |
1863 | resets (things which might change between targets). */ | |
1864 | ||
1865 | void | |
1866 | target_pre_inferior (int from_tty) | |
1867 | { | |
c378eb4e | 1868 | /* Clear out solib state. Otherwise the solib state of the previous |
b9db4ced | 1869 | inferior might have survived and is entirely wrong for the new |
c378eb4e | 1870 | target. This has been observed on GNU/Linux using glibc 2.3. How |
b9db4ced UW |
1871 | to reproduce: |
1872 | ||
1873 | bash$ ./foo& | |
1874 | [1] 4711 | |
1875 | bash$ ./foo& | |
1876 | [1] 4712 | |
1877 | bash$ gdb ./foo | |
1878 | [...] | |
1879 | (gdb) attach 4711 | |
1880 | (gdb) detach | |
1881 | (gdb) attach 4712 | |
1882 | Cannot access memory at address 0xdeadbeef | |
1883 | */ | |
b9db4ced | 1884 | |
50c71eaf PA |
1885 | /* In some OSs, the shared library list is the same/global/shared |
1886 | across inferiors. If code is shared between processes, so are | |
1887 | memory regions and features. */ | |
f5656ead | 1888 | if (!gdbarch_has_global_solist (target_gdbarch ())) |
50c71eaf PA |
1889 | { |
1890 | no_shared_libraries (NULL, from_tty); | |
1891 | ||
1892 | invalidate_target_mem_regions (); | |
424163ea | 1893 | |
50c71eaf PA |
1894 | target_clear_description (); |
1895 | } | |
8ffcbaaf | 1896 | |
e9756d52 PP |
1897 | /* attach_flag may be set if the previous process associated with |
1898 | the inferior was attached to. */ | |
1899 | current_inferior ()->attach_flag = 0; | |
1900 | ||
5d5658a1 PA |
1901 | current_inferior ()->highest_thread_num = 0; |
1902 | ||
8ffcbaaf | 1903 | agent_capability_invalidate (); |
fd79ecee DJ |
1904 | } |
1905 | ||
c906108c SS |
1906 | /* This is to be called by the open routine before it does |
1907 | anything. */ | |
1908 | ||
1909 | void | |
fba45db2 | 1910 | target_preopen (int from_tty) |
c906108c | 1911 | { |
c5aa993b | 1912 | dont_repeat (); |
c906108c | 1913 | |
5b6d1e4f | 1914 | if (current_inferior ()->pid != 0) |
c5aa993b | 1915 | { |
adf40b2e | 1916 | if (!from_tty |
5b6d1e4f | 1917 | || !target_has_execution |
b8fa0bfa | 1918 | || query (_("A program is being debugged already. Kill it? "))) |
5b6d1e4f PA |
1919 | { |
1920 | /* Core inferiors actually should be detached, not | |
1921 | killed. */ | |
1922 | if (target_has_execution) | |
1923 | target_kill (); | |
1924 | else | |
1925 | target_detach (current_inferior (), 0); | |
1926 | } | |
c906108c | 1927 | else |
8a3fe4f8 | 1928 | error (_("Program not killed.")); |
c906108c SS |
1929 | } |
1930 | ||
1931 | /* Calling target_kill may remove the target from the stack. But if | |
1932 | it doesn't (which seems like a win for UDI), remove it now. */ | |
87ab71f0 PA |
1933 | /* Leave the exec target, though. The user may be switching from a |
1934 | live process to a core of the same program. */ | |
460014f5 | 1935 | pop_all_targets_above (file_stratum); |
fd79ecee DJ |
1936 | |
1937 | target_pre_inferior (from_tty); | |
c906108c SS |
1938 | } |
1939 | ||
6bd6f3b6 | 1940 | /* See target.h. */ |
c906108c SS |
1941 | |
1942 | void | |
6e1e1966 | 1943 | target_detach (inferior *inf, int from_tty) |
c906108c | 1944 | { |
5783e150 PW |
1945 | /* After we have detached, we will clear the register cache for this inferior |
1946 | by calling registers_changed_ptid. We must save the pid_ptid before | |
1947 | detaching, as the target detach method will clear inf->pid. */ | |
1948 | ptid_t save_pid_ptid = ptid_t (inf->pid); | |
1949 | ||
6e1e1966 SM |
1950 | /* As long as some to_detach implementations rely on the current_inferior |
1951 | (either directly, or indirectly, like through target_gdbarch or by | |
1952 | reading memory), INF needs to be the current inferior. When that | |
1953 | requirement will become no longer true, then we can remove this | |
1954 | assertion. */ | |
1955 | gdb_assert (inf == current_inferior ()); | |
1956 | ||
f5656ead | 1957 | if (gdbarch_has_global_breakpoints (target_gdbarch ())) |
50c71eaf PA |
1958 | /* Don't remove global breakpoints here. They're removed on |
1959 | disconnection from the target. */ | |
1960 | ; | |
1961 | else | |
1962 | /* If we're in breakpoints-always-inserted mode, have to remove | |
00431a78 PA |
1963 | breakpoints before detaching. */ |
1964 | remove_breakpoints_inf (current_inferior ()); | |
74960c60 | 1965 | |
24291992 PA |
1966 | prepare_for_detach (); |
1967 | ||
5b6d1e4f PA |
1968 | /* Hold a strong reference because detaching may unpush the |
1969 | target. */ | |
1970 | auto proc_target_ref = target_ops_ref::new_reference (inf->process_target ()); | |
1971 | ||
8b88a78e | 1972 | current_top_target ()->detach (inf, from_tty); |
799efbe8 | 1973 | |
5b6d1e4f PA |
1974 | process_stratum_target *proc_target |
1975 | = as_process_stratum_target (proc_target_ref.get ()); | |
1976 | ||
1977 | registers_changed_ptid (proc_target, save_pid_ptid); | |
799efbe8 PW |
1978 | |
1979 | /* We have to ensure we have no frame cache left. Normally, | |
5783e150 PW |
1980 | registers_changed_ptid (save_pid_ptid) calls reinit_frame_cache when |
1981 | inferior_ptid matches save_pid_ptid, but in our case, it does not | |
799efbe8 PW |
1982 | call it, as inferior_ptid has been reset. */ |
1983 | reinit_frame_cache (); | |
c906108c SS |
1984 | } |
1985 | ||
6ad8ae5c | 1986 | void |
fee354ee | 1987 | target_disconnect (const char *args, int from_tty) |
6ad8ae5c | 1988 | { |
50c71eaf PA |
1989 | /* If we're in breakpoints-always-inserted mode or if breakpoints |
1990 | are global across processes, we have to remove them before | |
1991 | disconnecting. */ | |
74960c60 VP |
1992 | remove_breakpoints (); |
1993 | ||
8b88a78e | 1994 | current_top_target ()->disconnect (args, from_tty); |
6ad8ae5c DJ |
1995 | } |
1996 | ||
f2b9e3df SDJ |
1997 | /* See target/target.h. */ |
1998 | ||
117de6a9 | 1999 | ptid_t |
b60cea74 TT |
2000 | target_wait (ptid_t ptid, struct target_waitstatus *status, |
2001 | target_wait_flags options) | |
117de6a9 | 2002 | { |
8b88a78e | 2003 | return current_top_target ()->wait (ptid, status, options); |
117de6a9 PA |
2004 | } |
2005 | ||
0b333c5e PA |
2006 | /* See target.h. */ |
2007 | ||
2008 | ptid_t | |
2009 | default_target_wait (struct target_ops *ops, | |
2010 | ptid_t ptid, struct target_waitstatus *status, | |
b60cea74 | 2011 | target_wait_flags options) |
0b333c5e PA |
2012 | { |
2013 | status->kind = TARGET_WAITKIND_IGNORE; | |
2014 | return minus_one_ptid; | |
2015 | } | |
2016 | ||
a068643d | 2017 | std::string |
117de6a9 PA |
2018 | target_pid_to_str (ptid_t ptid) |
2019 | { | |
8b88a78e | 2020 | return current_top_target ()->pid_to_str (ptid); |
117de6a9 PA |
2021 | } |
2022 | ||
73ede765 | 2023 | const char * |
4694da01 TT |
2024 | target_thread_name (struct thread_info *info) |
2025 | { | |
5b6d1e4f PA |
2026 | gdb_assert (info->inf == current_inferior ()); |
2027 | ||
8b88a78e | 2028 | return current_top_target ()->thread_name (info); |
4694da01 TT |
2029 | } |
2030 | ||
e04ee09e KB |
2031 | struct thread_info * |
2032 | target_thread_handle_to_thread_info (const gdb_byte *thread_handle, | |
2033 | int handle_len, | |
2034 | struct inferior *inf) | |
2035 | { | |
8b88a78e | 2036 | return current_top_target ()->thread_handle_to_thread_info (thread_handle, |
f6ac5f3d | 2037 | handle_len, inf); |
e04ee09e KB |
2038 | } |
2039 | ||
3d6c6204 KB |
2040 | /* See target.h. */ |
2041 | ||
2042 | gdb::byte_vector | |
2043 | target_thread_info_to_thread_handle (struct thread_info *tip) | |
2044 | { | |
2045 | return current_top_target ()->thread_info_to_thread_handle (tip); | |
2046 | } | |
2047 | ||
e1ac3328 | 2048 | void |
2ea28649 | 2049 | target_resume (ptid_t ptid, int step, enum gdb_signal signal) |
e1ac3328 | 2050 | { |
5b6d1e4f PA |
2051 | process_stratum_target *curr_target = current_inferior ()->process_target (); |
2052 | ||
4e5d721f | 2053 | target_dcache_invalidate (); |
28439f5e | 2054 | |
8b88a78e | 2055 | current_top_target ()->resume (ptid, step, signal); |
28439f5e | 2056 | |
5b6d1e4f | 2057 | registers_changed_ptid (curr_target, ptid); |
251bde03 | 2058 | /* We only set the internal executing state here. The user/frontend |
f2ffa92b PA |
2059 | running state is set at a higher level. This also clears the |
2060 | thread's stop_pc as side effect. */ | |
719546c4 | 2061 | set_executing (curr_target, ptid, true); |
5b6d1e4f | 2062 | clear_inline_frame_state (curr_target, ptid); |
e1ac3328 | 2063 | } |
2455069d | 2064 | |
85ad3aaf PA |
2065 | /* If true, target_commit_resume is a nop. */ |
2066 | static int defer_target_commit_resume; | |
2067 | ||
2068 | /* See target.h. */ | |
2069 | ||
2070 | void | |
2071 | target_commit_resume (void) | |
2072 | { | |
85ad3aaf PA |
2073 | if (defer_target_commit_resume) |
2074 | return; | |
2075 | ||
8b88a78e | 2076 | current_top_target ()->commit_resume (); |
85ad3aaf PA |
2077 | } |
2078 | ||
2079 | /* See target.h. */ | |
2080 | ||
a9bc57b9 TT |
2081 | scoped_restore_tmpl<int> |
2082 | make_scoped_defer_target_commit_resume () | |
85ad3aaf | 2083 | { |
a9bc57b9 | 2084 | return make_scoped_restore (&defer_target_commit_resume, 1); |
85ad3aaf PA |
2085 | } |
2086 | ||
2455069d | 2087 | void |
adc6a863 | 2088 | target_pass_signals (gdb::array_view<const unsigned char> pass_signals) |
2455069d | 2089 | { |
adc6a863 | 2090 | current_top_target ()->pass_signals (pass_signals); |
2455069d UW |
2091 | } |
2092 | ||
9b224c5e | 2093 | void |
adc6a863 | 2094 | target_program_signals (gdb::array_view<const unsigned char> program_signals) |
9b224c5e | 2095 | { |
adc6a863 | 2096 | current_top_target ()->program_signals (program_signals); |
9b224c5e PA |
2097 | } |
2098 | ||
5ab2fbf1 SM |
2099 | static bool |
2100 | default_follow_fork (struct target_ops *self, bool follow_child, | |
2101 | bool detach_fork) | |
098dba18 TT |
2102 | { |
2103 | /* Some target returned a fork event, but did not know how to follow it. */ | |
2104 | internal_error (__FILE__, __LINE__, | |
2105 | _("could not find a target to follow fork")); | |
2106 | } | |
2107 | ||
ee057212 DJ |
2108 | /* Look through the list of possible targets for a target that can |
2109 | follow forks. */ | |
2110 | ||
5ab2fbf1 SM |
2111 | bool |
2112 | target_follow_fork (bool follow_child, bool detach_fork) | |
ee057212 | 2113 | { |
8b88a78e | 2114 | return current_top_target ()->follow_fork (follow_child, detach_fork); |
ee057212 DJ |
2115 | } |
2116 | ||
94585166 DB |
2117 | /* Target wrapper for follow exec hook. */ |
2118 | ||
2119 | void | |
4ca51187 | 2120 | target_follow_exec (struct inferior *inf, const char *execd_pathname) |
94585166 | 2121 | { |
8b88a78e | 2122 | current_top_target ()->follow_exec (inf, execd_pathname); |
94585166 DB |
2123 | } |
2124 | ||
8d657035 TT |
2125 | static void |
2126 | default_mourn_inferior (struct target_ops *self) | |
2127 | { | |
2128 | internal_error (__FILE__, __LINE__, | |
2129 | _("could not find a target to follow mourn inferior")); | |
2130 | } | |
2131 | ||
136d6dae | 2132 | void |
bc1e6c81 | 2133 | target_mourn_inferior (ptid_t ptid) |
136d6dae | 2134 | { |
d7e15655 | 2135 | gdb_assert (ptid == inferior_ptid); |
8b88a78e | 2136 | current_top_target ()->mourn_inferior (); |
136d6dae | 2137 | |
8d657035 TT |
2138 | /* We no longer need to keep handles on any of the object files. |
2139 | Make sure to release them to avoid unnecessarily locking any | |
2140 | of them while we're not actually debugging. */ | |
2141 | bfd_cache_close_all (); | |
136d6dae VP |
2142 | } |
2143 | ||
424163ea DJ |
2144 | /* Look for a target which can describe architectural features, starting |
2145 | from TARGET. If we find one, return its description. */ | |
2146 | ||
2147 | const struct target_desc * | |
2148 | target_read_description (struct target_ops *target) | |
2149 | { | |
f6ac5f3d | 2150 | return target->read_description (); |
424163ea DJ |
2151 | } |
2152 | ||
58a5184e | 2153 | /* This implements a basic search of memory, reading target memory and |
08388c79 DE |
2154 | performing the search here (as opposed to performing the search in on the |
2155 | target side with, for example, gdbserver). */ | |
2156 | ||
2157 | int | |
2158 | simple_search_memory (struct target_ops *ops, | |
2159 | CORE_ADDR start_addr, ULONGEST search_space_len, | |
2160 | const gdb_byte *pattern, ULONGEST pattern_len, | |
2161 | CORE_ADDR *found_addrp) | |
2162 | { | |
2163 | /* NOTE: also defined in find.c testcase. */ | |
2164 | #define SEARCH_CHUNK_SIZE 16000 | |
2165 | const unsigned chunk_size = SEARCH_CHUNK_SIZE; | |
2166 | /* Buffer to hold memory contents for searching. */ | |
08388c79 | 2167 | unsigned search_buf_size; |
08388c79 DE |
2168 | |
2169 | search_buf_size = chunk_size + pattern_len - 1; | |
2170 | ||
2171 | /* No point in trying to allocate a buffer larger than the search space. */ | |
2172 | if (search_space_len < search_buf_size) | |
2173 | search_buf_size = search_space_len; | |
2174 | ||
26fcd5d7 | 2175 | gdb::byte_vector search_buf (search_buf_size); |
08388c79 DE |
2176 | |
2177 | /* Prime the search buffer. */ | |
2178 | ||
2179 | if (target_read (ops, TARGET_OBJECT_MEMORY, NULL, | |
26fcd5d7 TT |
2180 | search_buf.data (), start_addr, search_buf_size) |
2181 | != search_buf_size) | |
08388c79 | 2182 | { |
b3dc46ff AB |
2183 | warning (_("Unable to access %s bytes of target " |
2184 | "memory at %s, halting search."), | |
2185 | pulongest (search_buf_size), hex_string (start_addr)); | |
08388c79 DE |
2186 | return -1; |
2187 | } | |
2188 | ||
2189 | /* Perform the search. | |
2190 | ||
2191 | The loop is kept simple by allocating [N + pattern-length - 1] bytes. | |
2192 | When we've scanned N bytes we copy the trailing bytes to the start and | |
2193 | read in another N bytes. */ | |
2194 | ||
2195 | while (search_space_len >= pattern_len) | |
2196 | { | |
2197 | gdb_byte *found_ptr; | |
325fac50 PA |
2198 | unsigned nr_search_bytes |
2199 | = std::min (search_space_len, (ULONGEST) search_buf_size); | |
08388c79 | 2200 | |
26fcd5d7 | 2201 | found_ptr = (gdb_byte *) memmem (search_buf.data (), nr_search_bytes, |
d7f3ff3e | 2202 | pattern, pattern_len); |
08388c79 DE |
2203 | |
2204 | if (found_ptr != NULL) | |
2205 | { | |
26fcd5d7 | 2206 | CORE_ADDR found_addr = start_addr + (found_ptr - search_buf.data ()); |
5d502164 | 2207 | |
08388c79 | 2208 | *found_addrp = found_addr; |
08388c79 DE |
2209 | return 1; |
2210 | } | |
2211 | ||
2212 | /* Not found in this chunk, skip to next chunk. */ | |
2213 | ||
2214 | /* Don't let search_space_len wrap here, it's unsigned. */ | |
2215 | if (search_space_len >= chunk_size) | |
2216 | search_space_len -= chunk_size; | |
2217 | else | |
2218 | search_space_len = 0; | |
2219 | ||
2220 | if (search_space_len >= pattern_len) | |
2221 | { | |
2222 | unsigned keep_len = search_buf_size - chunk_size; | |
8a35fb51 | 2223 | CORE_ADDR read_addr = start_addr + chunk_size + keep_len; |
08388c79 DE |
2224 | int nr_to_read; |
2225 | ||
2226 | /* Copy the trailing part of the previous iteration to the front | |
2227 | of the buffer for the next iteration. */ | |
2228 | gdb_assert (keep_len == pattern_len - 1); | |
26fcd5d7 | 2229 | memcpy (&search_buf[0], &search_buf[chunk_size], keep_len); |
08388c79 | 2230 | |
325fac50 PA |
2231 | nr_to_read = std::min (search_space_len - keep_len, |
2232 | (ULONGEST) chunk_size); | |
08388c79 DE |
2233 | |
2234 | if (target_read (ops, TARGET_OBJECT_MEMORY, NULL, | |
26fcd5d7 | 2235 | &search_buf[keep_len], read_addr, |
08388c79 DE |
2236 | nr_to_read) != nr_to_read) |
2237 | { | |
b3dc46ff | 2238 | warning (_("Unable to access %s bytes of target " |
9b20d036 | 2239 | "memory at %s, halting search."), |
b3dc46ff | 2240 | plongest (nr_to_read), |
08388c79 | 2241 | hex_string (read_addr)); |
08388c79 DE |
2242 | return -1; |
2243 | } | |
2244 | ||
2245 | start_addr += chunk_size; | |
2246 | } | |
2247 | } | |
2248 | ||
2249 | /* Not found. */ | |
2250 | ||
08388c79 DE |
2251 | return 0; |
2252 | } | |
2253 | ||
58a5184e TT |
2254 | /* Default implementation of memory-searching. */ |
2255 | ||
2256 | static int | |
2257 | default_search_memory (struct target_ops *self, | |
2258 | CORE_ADDR start_addr, ULONGEST search_space_len, | |
2259 | const gdb_byte *pattern, ULONGEST pattern_len, | |
2260 | CORE_ADDR *found_addrp) | |
2261 | { | |
2262 | /* Start over from the top of the target stack. */ | |
8b88a78e | 2263 | return simple_search_memory (current_top_target (), |
58a5184e TT |
2264 | start_addr, search_space_len, |
2265 | pattern, pattern_len, found_addrp); | |
2266 | } | |
2267 | ||
08388c79 DE |
2268 | /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the |
2269 | sequence of bytes in PATTERN with length PATTERN_LEN. | |
2270 | ||
2271 | The result is 1 if found, 0 if not found, and -1 if there was an error | |
2272 | requiring halting of the search (e.g. memory read error). | |
2273 | If the pattern is found the address is recorded in FOUND_ADDRP. */ | |
2274 | ||
2275 | int | |
2276 | target_search_memory (CORE_ADDR start_addr, ULONGEST search_space_len, | |
2277 | const gdb_byte *pattern, ULONGEST pattern_len, | |
2278 | CORE_ADDR *found_addrp) | |
2279 | { | |
8b88a78e | 2280 | return current_top_target ()->search_memory (start_addr, search_space_len, |
f6ac5f3d | 2281 | pattern, pattern_len, found_addrp); |
08388c79 DE |
2282 | } |
2283 | ||
8edfe269 DJ |
2284 | /* Look through the currently pushed targets. If none of them will |
2285 | be able to restart the currently running process, issue an error | |
2286 | message. */ | |
2287 | ||
2288 | void | |
2289 | target_require_runnable (void) | |
2290 | { | |
b6a8c27b | 2291 | for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
8edfe269 DJ |
2292 | { |
2293 | /* If this target knows how to create a new program, then | |
2294 | assume we will still be able to after killing the current | |
2295 | one. Either killing and mourning will not pop T, or else | |
2296 | find_default_run_target will find it again. */ | |
f6ac5f3d | 2297 | if (t->can_create_inferior ()) |
8edfe269 DJ |
2298 | return; |
2299 | ||
548740d6 | 2300 | /* Do not worry about targets at certain strata that can not |
8edfe269 DJ |
2301 | create inferiors. Assume they will be pushed again if |
2302 | necessary, and continue to the process_stratum. */ | |
66b4deae | 2303 | if (t->stratum () > process_stratum) |
8edfe269 DJ |
2304 | continue; |
2305 | ||
3e43a32a MS |
2306 | error (_("The \"%s\" target does not support \"run\". " |
2307 | "Try \"help target\" or \"continue\"."), | |
f6ac5f3d | 2308 | t->shortname ()); |
8edfe269 DJ |
2309 | } |
2310 | ||
2311 | /* This function is only called if the target is running. In that | |
2312 | case there should have been a process_stratum target and it | |
c378eb4e | 2313 | should either know how to create inferiors, or not... */ |
9b20d036 | 2314 | internal_error (__FILE__, __LINE__, _("No targets found")); |
8edfe269 DJ |
2315 | } |
2316 | ||
6a3cb8e8 PA |
2317 | /* Whether GDB is allowed to fall back to the default run target for |
2318 | "run", "attach", etc. when no target is connected yet. */ | |
491144b5 | 2319 | static bool auto_connect_native_target = true; |
6a3cb8e8 PA |
2320 | |
2321 | static void | |
2322 | show_auto_connect_native_target (struct ui_file *file, int from_tty, | |
2323 | struct cmd_list_element *c, const char *value) | |
2324 | { | |
2325 | fprintf_filtered (file, | |
2326 | _("Whether GDB may automatically connect to the " | |
2327 | "native target is %s.\n"), | |
2328 | value); | |
2329 | } | |
2330 | ||
d9f719f1 PA |
2331 | /* A pointer to the target that can respond to "run" or "attach". |
2332 | Native targets are always singletons and instantiated early at GDB | |
2333 | startup. */ | |
2334 | static target_ops *the_native_target; | |
2335 | ||
2336 | /* See target.h. */ | |
2337 | ||
2338 | void | |
2339 | set_native_target (target_ops *target) | |
2340 | { | |
2341 | if (the_native_target != NULL) | |
2342 | internal_error (__FILE__, __LINE__, | |
2343 | _("native target already set (\"%s\")."), | |
2344 | the_native_target->longname ()); | |
2345 | ||
2346 | the_native_target = target; | |
2347 | } | |
2348 | ||
2349 | /* See target.h. */ | |
2350 | ||
2351 | target_ops * | |
2352 | get_native_target () | |
2353 | { | |
2354 | return the_native_target; | |
2355 | } | |
2356 | ||
c906108c SS |
2357 | /* Look through the list of possible targets for a target that can |
2358 | execute a run or attach command without any other data. This is | |
2359 | used to locate the default process stratum. | |
2360 | ||
5f667f2d PA |
2361 | If DO_MESG is not NULL, the result is always valid (error() is |
2362 | called for errors); else, return NULL on error. */ | |
c906108c SS |
2363 | |
2364 | static struct target_ops * | |
a121b7c1 | 2365 | find_default_run_target (const char *do_mesg) |
c906108c | 2366 | { |
d9f719f1 PA |
2367 | if (auto_connect_native_target && the_native_target != NULL) |
2368 | return the_native_target; | |
c906108c | 2369 | |
d9f719f1 PA |
2370 | if (do_mesg != NULL) |
2371 | error (_("Don't know how to %s. Try \"help target\"."), do_mesg); | |
2372 | return NULL; | |
c906108c SS |
2373 | } |
2374 | ||
b3ccfe11 | 2375 | /* See target.h. */ |
c906108c | 2376 | |
b3ccfe11 TT |
2377 | struct target_ops * |
2378 | find_attach_target (void) | |
c906108c | 2379 | { |
b3ccfe11 | 2380 | /* If a target on the current stack can attach, use it. */ |
b6a8c27b | 2381 | for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
b3ccfe11 | 2382 | { |
f6ac5f3d | 2383 | if (t->can_attach ()) |
d9f719f1 | 2384 | return t; |
b3ccfe11 | 2385 | } |
c906108c | 2386 | |
b3ccfe11 | 2387 | /* Otherwise, use the default run target for attaching. */ |
d9f719f1 | 2388 | return find_default_run_target ("attach"); |
b84876c2 PA |
2389 | } |
2390 | ||
b3ccfe11 | 2391 | /* See target.h. */ |
b84876c2 | 2392 | |
b3ccfe11 TT |
2393 | struct target_ops * |
2394 | find_run_target (void) | |
9908b566 | 2395 | { |
f6ac5f3d | 2396 | /* If a target on the current stack can run, use it. */ |
b6a8c27b | 2397 | for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
b3ccfe11 | 2398 | { |
f6ac5f3d | 2399 | if (t->can_create_inferior ()) |
d9f719f1 | 2400 | return t; |
b3ccfe11 | 2401 | } |
5d502164 | 2402 | |
b3ccfe11 | 2403 | /* Otherwise, use the default run target. */ |
d9f719f1 | 2404 | return find_default_run_target ("run"); |
9908b566 VP |
2405 | } |
2406 | ||
f6ac5f3d PA |
2407 | bool |
2408 | target_ops::info_proc (const char *args, enum info_proc_what what) | |
2409 | { | |
2410 | return false; | |
2411 | } | |
2412 | ||
145b16a9 UW |
2413 | /* Implement the "info proc" command. */ |
2414 | ||
451b7c33 | 2415 | int |
7bc112c1 | 2416 | target_info_proc (const char *args, enum info_proc_what what) |
145b16a9 UW |
2417 | { |
2418 | struct target_ops *t; | |
2419 | ||
2420 | /* If we're already connected to something that can get us OS | |
2421 | related data, use it. Otherwise, try using the native | |
2422 | target. */ | |
f6ac5f3d PA |
2423 | t = find_target_at (process_stratum); |
2424 | if (t == NULL) | |
145b16a9 UW |
2425 | t = find_default_run_target (NULL); |
2426 | ||
b6a8c27b | 2427 | for (; t != NULL; t = t->beneath ()) |
145b16a9 | 2428 | { |
f6ac5f3d | 2429 | if (t->info_proc (args, what)) |
145b16a9 | 2430 | { |
145b16a9 UW |
2431 | if (targetdebug) |
2432 | fprintf_unfiltered (gdb_stdlog, | |
2433 | "target_info_proc (\"%s\", %d)\n", args, what); | |
2434 | ||
451b7c33 | 2435 | return 1; |
145b16a9 UW |
2436 | } |
2437 | } | |
2438 | ||
451b7c33 | 2439 | return 0; |
145b16a9 UW |
2440 | } |
2441 | ||
03583c20 | 2442 | static int |
2bfc0540 | 2443 | find_default_supports_disable_randomization (struct target_ops *self) |
03583c20 UW |
2444 | { |
2445 | struct target_ops *t; | |
2446 | ||
2447 | t = find_default_run_target (NULL); | |
f6ac5f3d PA |
2448 | if (t != NULL) |
2449 | return t->supports_disable_randomization (); | |
03583c20 UW |
2450 | return 0; |
2451 | } | |
2452 | ||
2453 | int | |
2454 | target_supports_disable_randomization (void) | |
2455 | { | |
8b88a78e | 2456 | return current_top_target ()->supports_disable_randomization (); |
03583c20 | 2457 | } |
9908b566 | 2458 | |
1fb77080 SDJ |
2459 | /* See target/target.h. */ |
2460 | ||
2461 | int | |
2462 | target_supports_multi_process (void) | |
2463 | { | |
8b88a78e | 2464 | return current_top_target ()->supports_multi_process (); |
1fb77080 SDJ |
2465 | } |
2466 | ||
b7b030ad TT |
2467 | /* See target.h. */ |
2468 | ||
9018be22 | 2469 | gdb::optional<gdb::char_vector> |
07e059b5 VP |
2470 | target_get_osdata (const char *type) |
2471 | { | |
07e059b5 VP |
2472 | struct target_ops *t; |
2473 | ||
739ef7fb PA |
2474 | /* If we're already connected to something that can get us OS |
2475 | related data, use it. Otherwise, try using the native | |
2476 | target. */ | |
f6ac5f3d PA |
2477 | t = find_target_at (process_stratum); |
2478 | if (t == NULL) | |
739ef7fb | 2479 | t = find_default_run_target ("get OS data"); |
07e059b5 VP |
2480 | |
2481 | if (!t) | |
9018be22 | 2482 | return {}; |
07e059b5 | 2483 | |
6d097e65 | 2484 | return target_read_stralloc (t, TARGET_OBJECT_OSDATA, type); |
07e059b5 VP |
2485 | } |
2486 | ||
8eaff7cd TT |
2487 | /* Determine the current address space of thread PTID. */ |
2488 | ||
2489 | struct address_space * | |
2490 | target_thread_address_space (ptid_t ptid) | |
2491 | { | |
2492 | struct address_space *aspace; | |
2493 | ||
8b88a78e | 2494 | aspace = current_top_target ()->thread_address_space (ptid); |
8eaff7cd TT |
2495 | gdb_assert (aspace != NULL); |
2496 | ||
8eaff7cd TT |
2497 | return aspace; |
2498 | } | |
2499 | ||
b6a8c27b PA |
2500 | /* See target.h. */ |
2501 | ||
2502 | target_ops * | |
2503 | target_ops::beneath () const | |
2504 | { | |
5b6d1e4f | 2505 | return current_inferior ()->find_target_beneath (this); |
b6a8c27b PA |
2506 | } |
2507 | ||
f6ac5f3d PA |
2508 | void |
2509 | target_ops::close () | |
2510 | { | |
2511 | } | |
2512 | ||
2513 | bool | |
2514 | target_ops::can_attach () | |
2515 | { | |
2516 | return 0; | |
2517 | } | |
2518 | ||
2519 | void | |
2520 | target_ops::attach (const char *, int) | |
2521 | { | |
2522 | gdb_assert_not_reached ("target_ops::attach called"); | |
2523 | } | |
2524 | ||
2525 | bool | |
2526 | target_ops::can_create_inferior () | |
2527 | { | |
2528 | return 0; | |
2529 | } | |
2530 | ||
2531 | void | |
2532 | target_ops::create_inferior (const char *, const std::string &, | |
2533 | char **, int) | |
2534 | { | |
2535 | gdb_assert_not_reached ("target_ops::create_inferior called"); | |
2536 | } | |
2537 | ||
57810aa7 | 2538 | bool |
f6ac5f3d PA |
2539 | target_ops::can_run () |
2540 | { | |
57810aa7 | 2541 | return false; |
f6ac5f3d PA |
2542 | } |
2543 | ||
2544 | int | |
2545 | target_can_run () | |
2546 | { | |
b6a8c27b | 2547 | for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
f6ac5f3d PA |
2548 | { |
2549 | if (t->can_run ()) | |
2550 | return 1; | |
2551 | } | |
2552 | ||
2553 | return 0; | |
2554 | } | |
7313baad UW |
2555 | |
2556 | /* Target file operations. */ | |
2557 | ||
2558 | static struct target_ops * | |
2559 | default_fileio_target (void) | |
2560 | { | |
f6ac5f3d PA |
2561 | struct target_ops *t; |
2562 | ||
7313baad UW |
2563 | /* If we're already connected to something that can perform |
2564 | file I/O, use it. Otherwise, try using the native target. */ | |
f6ac5f3d PA |
2565 | t = find_target_at (process_stratum); |
2566 | if (t != NULL) | |
2567 | return t; | |
2568 | return find_default_run_target ("file I/O"); | |
7313baad UW |
2569 | } |
2570 | ||
1c4b552b GB |
2571 | /* File handle for target file operations. */ |
2572 | ||
5ff79300 | 2573 | struct fileio_fh_t |
1c4b552b | 2574 | { |
20db9c52 PA |
2575 | /* The target on which this file is open. NULL if the target is |
2576 | meanwhile closed while the handle is open. */ | |
5ff79300 | 2577 | target_ops *target; |
1c4b552b GB |
2578 | |
2579 | /* The file descriptor on the target. */ | |
5ff79300 | 2580 | int target_fd; |
1c4b552b | 2581 | |
5ff79300 PA |
2582 | /* Check whether this fileio_fh_t represents a closed file. */ |
2583 | bool is_closed () | |
2584 | { | |
2585 | return target_fd < 0; | |
2586 | } | |
2587 | }; | |
1c4b552b GB |
2588 | |
2589 | /* Vector of currently open file handles. The value returned by | |
2590 | target_fileio_open and passed as the FD argument to other | |
2591 | target_fileio_* functions is an index into this vector. This | |
2592 | vector's entries are never freed; instead, files are marked as | |
2593 | closed, and the handle becomes available for reuse. */ | |
5ff79300 | 2594 | static std::vector<fileio_fh_t> fileio_fhandles; |
1c4b552b GB |
2595 | |
2596 | /* Index into fileio_fhandles of the lowest handle that might be | |
2597 | closed. This permits handle reuse without searching the whole | |
2598 | list each time a new file is opened. */ | |
2599 | static int lowest_closed_fd; | |
2600 | ||
20db9c52 PA |
2601 | /* Invalidate the target associated with open handles that were open |
2602 | on target TARG, since we're about to close (and maybe destroy) the | |
2603 | target. The handles remain open from the client's perspective, but | |
2604 | trying to do anything with them other than closing them will fail | |
2605 | with EIO. */ | |
2606 | ||
2607 | static void | |
2608 | fileio_handles_invalidate_target (target_ops *targ) | |
2609 | { | |
2610 | for (fileio_fh_t &fh : fileio_fhandles) | |
2611 | if (fh.target == targ) | |
2612 | fh.target = NULL; | |
2613 | } | |
2614 | ||
1c4b552b GB |
2615 | /* Acquire a target fileio file descriptor. */ |
2616 | ||
2617 | static int | |
5ff79300 | 2618 | acquire_fileio_fd (target_ops *target, int target_fd) |
1c4b552b | 2619 | { |
1c4b552b | 2620 | /* Search for closed handles to reuse. */ |
5ff79300 PA |
2621 | for (; lowest_closed_fd < fileio_fhandles.size (); lowest_closed_fd++) |
2622 | { | |
2623 | fileio_fh_t &fh = fileio_fhandles[lowest_closed_fd]; | |
2624 | ||
2625 | if (fh.is_closed ()) | |
2626 | break; | |
2627 | } | |
1c4b552b GB |
2628 | |
2629 | /* Push a new handle if no closed handles were found. */ | |
5ff79300 PA |
2630 | if (lowest_closed_fd == fileio_fhandles.size ()) |
2631 | fileio_fhandles.push_back (fileio_fh_t {target, target_fd}); | |
2632 | else | |
2633 | fileio_fhandles[lowest_closed_fd] = {target, target_fd}; | |
1c4b552b | 2634 | |
5ff79300 PA |
2635 | /* Should no longer be marked closed. */ |
2636 | gdb_assert (!fileio_fhandles[lowest_closed_fd].is_closed ()); | |
1c4b552b GB |
2637 | |
2638 | /* Return its index, and start the next lookup at | |
2639 | the next index. */ | |
2640 | return lowest_closed_fd++; | |
2641 | } | |
2642 | ||
2643 | /* Release a target fileio file descriptor. */ | |
2644 | ||
2645 | static void | |
2646 | release_fileio_fd (int fd, fileio_fh_t *fh) | |
2647 | { | |
5ff79300 | 2648 | fh->target_fd = -1; |
325fac50 | 2649 | lowest_closed_fd = std::min (lowest_closed_fd, fd); |
1c4b552b GB |
2650 | } |
2651 | ||
2652 | /* Return a pointer to the fileio_fhandle_t corresponding to FD. */ | |
2653 | ||
5ff79300 PA |
2654 | static fileio_fh_t * |
2655 | fileio_fd_to_fh (int fd) | |
2656 | { | |
2657 | return &fileio_fhandles[fd]; | |
2658 | } | |
1c4b552b | 2659 | |
f6ac5f3d PA |
2660 | |
2661 | /* Default implementations of file i/o methods. We don't want these | |
2662 | to delegate automatically, because we need to know which target | |
2663 | supported the method, in order to call it directly from within | |
2664 | pread/pwrite, etc. */ | |
2665 | ||
2666 | int | |
2667 | target_ops::fileio_open (struct inferior *inf, const char *filename, | |
2668 | int flags, int mode, int warn_if_slow, | |
2669 | int *target_errno) | |
2670 | { | |
2671 | *target_errno = FILEIO_ENOSYS; | |
2672 | return -1; | |
2673 | } | |
2674 | ||
2675 | int | |
2676 | target_ops::fileio_pwrite (int fd, const gdb_byte *write_buf, int len, | |
2677 | ULONGEST offset, int *target_errno) | |
2678 | { | |
2679 | *target_errno = FILEIO_ENOSYS; | |
2680 | return -1; | |
2681 | } | |
2682 | ||
2683 | int | |
2684 | target_ops::fileio_pread (int fd, gdb_byte *read_buf, int len, | |
2685 | ULONGEST offset, int *target_errno) | |
2686 | { | |
2687 | *target_errno = FILEIO_ENOSYS; | |
2688 | return -1; | |
2689 | } | |
2690 | ||
2691 | int | |
2692 | target_ops::fileio_fstat (int fd, struct stat *sb, int *target_errno) | |
2693 | { | |
2694 | *target_errno = FILEIO_ENOSYS; | |
2695 | return -1; | |
2696 | } | |
2697 | ||
2698 | int | |
2699 | target_ops::fileio_close (int fd, int *target_errno) | |
2700 | { | |
2701 | *target_errno = FILEIO_ENOSYS; | |
2702 | return -1; | |
2703 | } | |
2704 | ||
2705 | int | |
2706 | target_ops::fileio_unlink (struct inferior *inf, const char *filename, | |
2707 | int *target_errno) | |
2708 | { | |
2709 | *target_errno = FILEIO_ENOSYS; | |
2710 | return -1; | |
2711 | } | |
2712 | ||
2713 | gdb::optional<std::string> | |
2714 | target_ops::fileio_readlink (struct inferior *inf, const char *filename, | |
2715 | int *target_errno) | |
2716 | { | |
2717 | *target_errno = FILEIO_ENOSYS; | |
2718 | return {}; | |
2719 | } | |
2720 | ||
4111f652 | 2721 | /* See target.h. */ |
12e2a5fd | 2722 | |
4111f652 PA |
2723 | int |
2724 | target_fileio_open (struct inferior *inf, const char *filename, | |
2725 | int flags, int mode, bool warn_if_slow, int *target_errno) | |
7313baad | 2726 | { |
b6a8c27b | 2727 | for (target_ops *t = default_fileio_target (); t != NULL; t = t->beneath ()) |
7313baad | 2728 | { |
f6ac5f3d PA |
2729 | int fd = t->fileio_open (inf, filename, flags, mode, |
2730 | warn_if_slow, target_errno); | |
7313baad | 2731 | |
f6ac5f3d PA |
2732 | if (fd == -1 && *target_errno == FILEIO_ENOSYS) |
2733 | continue; | |
1c4b552b | 2734 | |
f6ac5f3d PA |
2735 | if (fd < 0) |
2736 | fd = -1; | |
2737 | else | |
2738 | fd = acquire_fileio_fd (t, fd); | |
2739 | ||
2740 | if (targetdebug) | |
2741 | fprintf_unfiltered (gdb_stdlog, | |
4313b8c0 | 2742 | "target_fileio_open (%d,%s,0x%x,0%o,%d)" |
07c138c8 GB |
2743 | " = %d (%d)\n", |
2744 | inf == NULL ? 0 : inf->num, | |
7313baad | 2745 | filename, flags, mode, |
4313b8c0 GB |
2746 | warn_if_slow, fd, |
2747 | fd != -1 ? 0 : *target_errno); | |
f6ac5f3d | 2748 | return fd; |
7313baad UW |
2749 | } |
2750 | ||
2751 | *target_errno = FILEIO_ENOSYS; | |
2752 | return -1; | |
2753 | } | |
2754 | ||
12e2a5fd GB |
2755 | /* See target.h. */ |
2756 | ||
7313baad UW |
2757 | int |
2758 | target_fileio_pwrite (int fd, const gdb_byte *write_buf, int len, | |
2759 | ULONGEST offset, int *target_errno) | |
2760 | { | |
1c4b552b GB |
2761 | fileio_fh_t *fh = fileio_fd_to_fh (fd); |
2762 | int ret = -1; | |
7313baad | 2763 | |
5ff79300 | 2764 | if (fh->is_closed ()) |
1c4b552b | 2765 | *target_errno = EBADF; |
20db9c52 PA |
2766 | else if (fh->target == NULL) |
2767 | *target_errno = EIO; | |
1c4b552b | 2768 | else |
f6ac5f3d PA |
2769 | ret = fh->target->fileio_pwrite (fh->target_fd, write_buf, |
2770 | len, offset, target_errno); | |
7313baad | 2771 | |
1c4b552b GB |
2772 | if (targetdebug) |
2773 | fprintf_unfiltered (gdb_stdlog, | |
2774 | "target_fileio_pwrite (%d,...,%d,%s) " | |
2775 | "= %d (%d)\n", | |
2776 | fd, len, pulongest (offset), | |
2777 | ret, ret != -1 ? 0 : *target_errno); | |
2778 | return ret; | |
7313baad UW |
2779 | } |
2780 | ||
12e2a5fd GB |
2781 | /* See target.h. */ |
2782 | ||
7313baad UW |
2783 | int |
2784 | target_fileio_pread (int fd, gdb_byte *read_buf, int len, | |
2785 | ULONGEST offset, int *target_errno) | |
2786 | { | |
1c4b552b GB |
2787 | fileio_fh_t *fh = fileio_fd_to_fh (fd); |
2788 | int ret = -1; | |
7313baad | 2789 | |
5ff79300 | 2790 | if (fh->is_closed ()) |
1c4b552b | 2791 | *target_errno = EBADF; |
20db9c52 PA |
2792 | else if (fh->target == NULL) |
2793 | *target_errno = EIO; | |
1c4b552b | 2794 | else |
f6ac5f3d PA |
2795 | ret = fh->target->fileio_pread (fh->target_fd, read_buf, |
2796 | len, offset, target_errno); | |
7313baad | 2797 | |
1c4b552b GB |
2798 | if (targetdebug) |
2799 | fprintf_unfiltered (gdb_stdlog, | |
2800 | "target_fileio_pread (%d,...,%d,%s) " | |
2801 | "= %d (%d)\n", | |
2802 | fd, len, pulongest (offset), | |
2803 | ret, ret != -1 ? 0 : *target_errno); | |
9b15c1f0 GB |
2804 | return ret; |
2805 | } | |
2806 | ||
2807 | /* See target.h. */ | |
12e2a5fd | 2808 | |
9b15c1f0 GB |
2809 | int |
2810 | target_fileio_fstat (int fd, struct stat *sb, int *target_errno) | |
2811 | { | |
2812 | fileio_fh_t *fh = fileio_fd_to_fh (fd); | |
2813 | int ret = -1; | |
2814 | ||
5ff79300 | 2815 | if (fh->is_closed ()) |
9b15c1f0 | 2816 | *target_errno = EBADF; |
20db9c52 PA |
2817 | else if (fh->target == NULL) |
2818 | *target_errno = EIO; | |
9b15c1f0 | 2819 | else |
f6ac5f3d | 2820 | ret = fh->target->fileio_fstat (fh->target_fd, sb, target_errno); |
9b15c1f0 GB |
2821 | |
2822 | if (targetdebug) | |
2823 | fprintf_unfiltered (gdb_stdlog, | |
2824 | "target_fileio_fstat (%d) = %d (%d)\n", | |
2825 | fd, ret, ret != -1 ? 0 : *target_errno); | |
1c4b552b | 2826 | return ret; |
7313baad UW |
2827 | } |
2828 | ||
12e2a5fd GB |
2829 | /* See target.h. */ |
2830 | ||
7313baad UW |
2831 | int |
2832 | target_fileio_close (int fd, int *target_errno) | |
2833 | { | |
1c4b552b GB |
2834 | fileio_fh_t *fh = fileio_fd_to_fh (fd); |
2835 | int ret = -1; | |
7313baad | 2836 | |
5ff79300 | 2837 | if (fh->is_closed ()) |
1c4b552b GB |
2838 | *target_errno = EBADF; |
2839 | else | |
7313baad | 2840 | { |
20db9c52 | 2841 | if (fh->target != NULL) |
f6ac5f3d PA |
2842 | ret = fh->target->fileio_close (fh->target_fd, |
2843 | target_errno); | |
20db9c52 PA |
2844 | else |
2845 | ret = 0; | |
1c4b552b | 2846 | release_fileio_fd (fd, fh); |
7313baad UW |
2847 | } |
2848 | ||
1c4b552b GB |
2849 | if (targetdebug) |
2850 | fprintf_unfiltered (gdb_stdlog, | |
2851 | "target_fileio_close (%d) = %d (%d)\n", | |
2852 | fd, ret, ret != -1 ? 0 : *target_errno); | |
2853 | return ret; | |
7313baad UW |
2854 | } |
2855 | ||
12e2a5fd GB |
2856 | /* See target.h. */ |
2857 | ||
7313baad | 2858 | int |
07c138c8 GB |
2859 | target_fileio_unlink (struct inferior *inf, const char *filename, |
2860 | int *target_errno) | |
7313baad | 2861 | { |
b6a8c27b | 2862 | for (target_ops *t = default_fileio_target (); t != NULL; t = t->beneath ()) |
7313baad | 2863 | { |
f6ac5f3d | 2864 | int ret = t->fileio_unlink (inf, filename, target_errno); |
7313baad | 2865 | |
f6ac5f3d PA |
2866 | if (ret == -1 && *target_errno == FILEIO_ENOSYS) |
2867 | continue; | |
2868 | ||
2869 | if (targetdebug) | |
2870 | fprintf_unfiltered (gdb_stdlog, | |
2871 | "target_fileio_unlink (%d,%s)" | |
2872 | " = %d (%d)\n", | |
2873 | inf == NULL ? 0 : inf->num, filename, | |
2874 | ret, ret != -1 ? 0 : *target_errno); | |
2875 | return ret; | |
7313baad UW |
2876 | } |
2877 | ||
2878 | *target_errno = FILEIO_ENOSYS; | |
2879 | return -1; | |
2880 | } | |
2881 | ||
12e2a5fd GB |
2882 | /* See target.h. */ |
2883 | ||
e0d3522b | 2884 | gdb::optional<std::string> |
07c138c8 GB |
2885 | target_fileio_readlink (struct inferior *inf, const char *filename, |
2886 | int *target_errno) | |
b9e7b9c3 | 2887 | { |
b6a8c27b | 2888 | for (target_ops *t = default_fileio_target (); t != NULL; t = t->beneath ()) |
b9e7b9c3 | 2889 | { |
f6ac5f3d PA |
2890 | gdb::optional<std::string> ret |
2891 | = t->fileio_readlink (inf, filename, target_errno); | |
b9e7b9c3 | 2892 | |
f6ac5f3d PA |
2893 | if (!ret.has_value () && *target_errno == FILEIO_ENOSYS) |
2894 | continue; | |
2895 | ||
2896 | if (targetdebug) | |
2897 | fprintf_unfiltered (gdb_stdlog, | |
2898 | "target_fileio_readlink (%d,%s)" | |
2899 | " = %s (%d)\n", | |
2900 | inf == NULL ? 0 : inf->num, | |
2901 | filename, ret ? ret->c_str () : "(nil)", | |
2902 | ret ? 0 : *target_errno); | |
2903 | return ret; | |
b9e7b9c3 UW |
2904 | } |
2905 | ||
2906 | *target_errno = FILEIO_ENOSYS; | |
e0d3522b | 2907 | return {}; |
b9e7b9c3 UW |
2908 | } |
2909 | ||
770623f7 TT |
2910 | /* Like scoped_fd, but specific to target fileio. */ |
2911 | ||
2912 | class scoped_target_fd | |
7313baad | 2913 | { |
770623f7 TT |
2914 | public: |
2915 | explicit scoped_target_fd (int fd) noexcept | |
2916 | : m_fd (fd) | |
2917 | { | |
2918 | } | |
7313baad | 2919 | |
770623f7 TT |
2920 | ~scoped_target_fd () |
2921 | { | |
2922 | if (m_fd >= 0) | |
2923 | { | |
2924 | int target_errno; | |
2925 | ||
2926 | target_fileio_close (m_fd, &target_errno); | |
2927 | } | |
2928 | } | |
2929 | ||
2930 | DISABLE_COPY_AND_ASSIGN (scoped_target_fd); | |
2931 | ||
2932 | int get () const noexcept | |
2933 | { | |
2934 | return m_fd; | |
2935 | } | |
2936 | ||
2937 | private: | |
2938 | int m_fd; | |
2939 | }; | |
7313baad | 2940 | |
07c138c8 GB |
2941 | /* Read target file FILENAME, in the filesystem as seen by INF. If |
2942 | INF is NULL, use the filesystem seen by the debugger (GDB or, for | |
2943 | remote targets, the remote stub). Store the result in *BUF_P and | |
2944 | return the size of the transferred data. PADDING additional bytes | |
2945 | are available in *BUF_P. This is a helper function for | |
2946 | target_fileio_read_alloc; see the declaration of that function for | |
2947 | more information. */ | |
7313baad | 2948 | |
f7af1fcd JK |
2949 | static LONGEST |
2950 | target_fileio_read_alloc_1 (struct inferior *inf, const char *filename, | |
2951 | gdb_byte **buf_p, int padding) | |
2952 | { | |
db1ff28b JK |
2953 | size_t buf_alloc, buf_pos; |
2954 | gdb_byte *buf; | |
2955 | LONGEST n; | |
db1ff28b | 2956 | int target_errno; |
f7af1fcd | 2957 | |
770623f7 | 2958 | scoped_target_fd fd (target_fileio_open (inf, filename, FILEIO_O_RDONLY, |
4111f652 | 2959 | 0700, false, &target_errno)); |
770623f7 | 2960 | if (fd.get () == -1) |
f7af1fcd JK |
2961 | return -1; |
2962 | ||
db1ff28b JK |
2963 | /* Start by reading up to 4K at a time. The target will throttle |
2964 | this number down if necessary. */ | |
2965 | buf_alloc = 4096; | |
224c3ddb | 2966 | buf = (gdb_byte *) xmalloc (buf_alloc); |
db1ff28b JK |
2967 | buf_pos = 0; |
2968 | while (1) | |
2969 | { | |
770623f7 | 2970 | n = target_fileio_pread (fd.get (), &buf[buf_pos], |
db1ff28b JK |
2971 | buf_alloc - buf_pos - padding, buf_pos, |
2972 | &target_errno); | |
2973 | if (n < 0) | |
2974 | { | |
2975 | /* An error occurred. */ | |
db1ff28b JK |
2976 | xfree (buf); |
2977 | return -1; | |
2978 | } | |
2979 | else if (n == 0) | |
2980 | { | |
2981 | /* Read all there was. */ | |
db1ff28b JK |
2982 | if (buf_pos == 0) |
2983 | xfree (buf); | |
2984 | else | |
2985 | *buf_p = buf; | |
2986 | return buf_pos; | |
2987 | } | |
2988 | ||
2989 | buf_pos += n; | |
2990 | ||
2991 | /* If the buffer is filling up, expand it. */ | |
2992 | if (buf_alloc < buf_pos * 2) | |
2993 | { | |
2994 | buf_alloc *= 2; | |
224c3ddb | 2995 | buf = (gdb_byte *) xrealloc (buf, buf_alloc); |
db1ff28b JK |
2996 | } |
2997 | ||
2998 | QUIT; | |
2999 | } | |
f7af1fcd JK |
3000 | } |
3001 | ||
12e2a5fd | 3002 | /* See target.h. */ |
7313baad UW |
3003 | |
3004 | LONGEST | |
07c138c8 GB |
3005 | target_fileio_read_alloc (struct inferior *inf, const char *filename, |
3006 | gdb_byte **buf_p) | |
7313baad | 3007 | { |
07c138c8 | 3008 | return target_fileio_read_alloc_1 (inf, filename, buf_p, 0); |
7313baad UW |
3009 | } |
3010 | ||
db1ff28b | 3011 | /* See target.h. */ |
f7af1fcd | 3012 | |
87028b87 | 3013 | gdb::unique_xmalloc_ptr<char> |
f7af1fcd JK |
3014 | target_fileio_read_stralloc (struct inferior *inf, const char *filename) |
3015 | { | |
db1ff28b JK |
3016 | gdb_byte *buffer; |
3017 | char *bufstr; | |
3018 | LONGEST i, transferred; | |
3019 | ||
3020 | transferred = target_fileio_read_alloc_1 (inf, filename, &buffer, 1); | |
3021 | bufstr = (char *) buffer; | |
3022 | ||
3023 | if (transferred < 0) | |
87028b87 | 3024 | return gdb::unique_xmalloc_ptr<char> (nullptr); |
db1ff28b JK |
3025 | |
3026 | if (transferred == 0) | |
b02f78f9 | 3027 | return make_unique_xstrdup (""); |
db1ff28b JK |
3028 | |
3029 | bufstr[transferred] = 0; | |
3030 | ||
3031 | /* Check for embedded NUL bytes; but allow trailing NULs. */ | |
3032 | for (i = strlen (bufstr); i < transferred; i++) | |
3033 | if (bufstr[i] != 0) | |
3034 | { | |
3035 | warning (_("target file %s " | |
3036 | "contained unexpected null characters"), | |
3037 | filename); | |
3038 | break; | |
3039 | } | |
3040 | ||
87028b87 | 3041 | return gdb::unique_xmalloc_ptr<char> (bufstr); |
f7af1fcd | 3042 | } |
7313baad | 3043 | |
db1ff28b | 3044 | |
e0d24f8d | 3045 | static int |
31568a15 TT |
3046 | default_region_ok_for_hw_watchpoint (struct target_ops *self, |
3047 | CORE_ADDR addr, int len) | |
e0d24f8d | 3048 | { |
f5656ead | 3049 | return (len <= gdbarch_ptr_bit (target_gdbarch ()) / TARGET_CHAR_BIT); |
ccaa32c7 GS |
3050 | } |
3051 | ||
5009afc5 AS |
3052 | static int |
3053 | default_watchpoint_addr_within_range (struct target_ops *target, | |
3054 | CORE_ADDR addr, | |
3055 | CORE_ADDR start, int length) | |
3056 | { | |
3057 | return addr >= start && addr < start + length; | |
3058 | } | |
3059 | ||
8b06beed TT |
3060 | /* See target.h. */ |
3061 | ||
a1740ee1 PA |
3062 | target_ops * |
3063 | target_stack::find_beneath (const target_ops *t) const | |
8b06beed | 3064 | { |
a1740ee1 | 3065 | /* Look for a non-empty slot at stratum levels beneath T's. */ |
66b4deae | 3066 | for (int stratum = t->stratum () - 1; stratum >= 0; --stratum) |
a1740ee1 PA |
3067 | if (m_stack[stratum] != NULL) |
3068 | return m_stack[stratum]; | |
8b06beed TT |
3069 | |
3070 | return NULL; | |
3071 | } | |
3072 | ||
a1740ee1 PA |
3073 | /* See target.h. */ |
3074 | ||
3075 | struct target_ops * | |
3076 | find_target_at (enum strata stratum) | |
3077 | { | |
5b6d1e4f | 3078 | return current_inferior ()->target_at (stratum); |
a1740ee1 PA |
3079 | } |
3080 | ||
c906108c | 3081 | \f |
0f48b757 PA |
3082 | |
3083 | /* See target.h */ | |
3084 | ||
3085 | void | |
3086 | target_announce_detach (int from_tty) | |
3087 | { | |
3088 | pid_t pid; | |
a121b7c1 | 3089 | const char *exec_file; |
0f48b757 PA |
3090 | |
3091 | if (!from_tty) | |
3092 | return; | |
3093 | ||
3094 | exec_file = get_exec_file (0); | |
3095 | if (exec_file == NULL) | |
3096 | exec_file = ""; | |
3097 | ||
e99b03dc | 3098 | pid = inferior_ptid.pid (); |
0f48b757 | 3099 | printf_unfiltered (_("Detaching from program: %s, %s\n"), exec_file, |
a068643d | 3100 | target_pid_to_str (ptid_t (pid)).c_str ()); |
0f48b757 PA |
3101 | } |
3102 | ||
c906108c SS |
3103 | /* The inferior process has died. Long live the inferior! */ |
3104 | ||
3105 | void | |
fba45db2 | 3106 | generic_mourn_inferior (void) |
c906108c | 3107 | { |
00431a78 | 3108 | inferior *inf = current_inferior (); |
c906108c | 3109 | |
a0776b13 | 3110 | switch_to_no_thread (); |
7f9f62ba | 3111 | |
f59f708a PA |
3112 | /* Mark breakpoints uninserted in case something tries to delete a |
3113 | breakpoint while we delete the inferior's threads (which would | |
3114 | fail, since the inferior is long gone). */ | |
3115 | mark_breakpoints_out (); | |
3116 | ||
00431a78 PA |
3117 | if (inf->pid != 0) |
3118 | exit_inferior (inf); | |
7f9f62ba | 3119 | |
f59f708a PA |
3120 | /* Note this wipes step-resume breakpoints, so needs to be done |
3121 | after exit_inferior, which ends up referencing the step-resume | |
3122 | breakpoints through clear_thread_inferior_resources. */ | |
c906108c | 3123 | breakpoint_init_inferior (inf_exited); |
f59f708a | 3124 | |
c906108c SS |
3125 | registers_changed (); |
3126 | ||
c906108c SS |
3127 | reopen_exec_file (); |
3128 | reinit_frame_cache (); | |
3129 | ||
9a4105ab AC |
3130 | if (deprecated_detach_hook) |
3131 | deprecated_detach_hook (); | |
c906108c SS |
3132 | } |
3133 | \f | |
fd0a2a6f MK |
3134 | /* Convert a normal process ID to a string. Returns the string in a |
3135 | static buffer. */ | |
c906108c | 3136 | |
a068643d | 3137 | std::string |
39f77062 | 3138 | normal_pid_to_str (ptid_t ptid) |
c906108c | 3139 | { |
a068643d | 3140 | return string_printf ("process %d", ptid.pid ()); |
c906108c SS |
3141 | } |
3142 | ||
a068643d | 3143 | static std::string |
770234d3 | 3144 | default_pid_to_str (struct target_ops *ops, ptid_t ptid) |
117de6a9 PA |
3145 | { |
3146 | return normal_pid_to_str (ptid); | |
3147 | } | |
3148 | ||
9b4eba8e HZ |
3149 | /* Error-catcher for target_find_memory_regions. */ |
3150 | static int | |
2e73927c TT |
3151 | dummy_find_memory_regions (struct target_ops *self, |
3152 | find_memory_region_ftype ignore1, void *ignore2) | |
be4d1333 | 3153 | { |
9b4eba8e | 3154 | error (_("Command not implemented for this target.")); |
be4d1333 MS |
3155 | return 0; |
3156 | } | |
3157 | ||
9b4eba8e HZ |
3158 | /* Error-catcher for target_make_corefile_notes. */ |
3159 | static char * | |
fc6691b2 TT |
3160 | dummy_make_corefile_notes (struct target_ops *self, |
3161 | bfd *ignore1, int *ignore2) | |
be4d1333 | 3162 | { |
9b4eba8e | 3163 | error (_("Command not implemented for this target.")); |
be4d1333 MS |
3164 | return NULL; |
3165 | } | |
3166 | ||
f6ac5f3d PA |
3167 | #include "target-delegates.c" |
3168 | ||
06b5b831 TT |
3169 | /* The initial current target, so that there is always a semi-valid |
3170 | current target. */ | |
3171 | ||
3172 | static dummy_target the_dummy_target; | |
c906108c | 3173 | |
5b6d1e4f PA |
3174 | /* See target.h. */ |
3175 | ||
3176 | target_ops * | |
3177 | get_dummy_target () | |
3178 | { | |
3179 | return &the_dummy_target; | |
3180 | } | |
3181 | ||
d9f719f1 PA |
3182 | static const target_info dummy_target_info = { |
3183 | "None", | |
3184 | N_("None"), | |
3185 | "" | |
3186 | }; | |
3187 | ||
66b4deae PA |
3188 | strata |
3189 | dummy_target::stratum () const | |
f6ac5f3d | 3190 | { |
66b4deae | 3191 | return dummy_stratum; |
f6ac5f3d PA |
3192 | } |
3193 | ||
66b4deae PA |
3194 | strata |
3195 | debug_target::stratum () const | |
f6ac5f3d | 3196 | { |
66b4deae | 3197 | return debug_stratum; |
f6ac5f3d PA |
3198 | } |
3199 | ||
d9f719f1 PA |
3200 | const target_info & |
3201 | dummy_target::info () const | |
f6ac5f3d | 3202 | { |
d9f719f1 | 3203 | return dummy_target_info; |
f6ac5f3d PA |
3204 | } |
3205 | ||
d9f719f1 PA |
3206 | const target_info & |
3207 | debug_target::info () const | |
f6ac5f3d | 3208 | { |
b6a8c27b | 3209 | return beneath ()->info (); |
f6ac5f3d PA |
3210 | } |
3211 | ||
c906108c | 3212 | \f |
c906108c | 3213 | |
f1c07ab0 | 3214 | void |
460014f5 | 3215 | target_close (struct target_ops *targ) |
f1c07ab0 | 3216 | { |
7fdc1521 TT |
3217 | gdb_assert (!target_is_pushed (targ)); |
3218 | ||
20db9c52 PA |
3219 | fileio_handles_invalidate_target (targ); |
3220 | ||
f6ac5f3d | 3221 | targ->close (); |
947b8855 PA |
3222 | |
3223 | if (targetdebug) | |
460014f5 | 3224 | fprintf_unfiltered (gdb_stdlog, "target_close ()\n"); |
f1c07ab0 AC |
3225 | } |
3226 | ||
28439f5e PA |
3227 | int |
3228 | target_thread_alive (ptid_t ptid) | |
c906108c | 3229 | { |
8b88a78e | 3230 | return current_top_target ()->thread_alive (ptid); |
28439f5e PA |
3231 | } |
3232 | ||
3233 | void | |
e8032dde | 3234 | target_update_thread_list (void) |
28439f5e | 3235 | { |
8b88a78e | 3236 | current_top_target ()->update_thread_list (); |
c906108c SS |
3237 | } |
3238 | ||
d914c394 SS |
3239 | void |
3240 | target_stop (ptid_t ptid) | |
3241 | { | |
3242 | if (!may_stop) | |
3243 | { | |
3244 | warning (_("May not interrupt or stop the target, ignoring attempt")); | |
3245 | return; | |
3246 | } | |
3247 | ||
8b88a78e | 3248 | current_top_target ()->stop (ptid); |
d914c394 SS |
3249 | } |
3250 | ||
bfedc46a | 3251 | void |
e671cd59 | 3252 | target_interrupt () |
bfedc46a PA |
3253 | { |
3254 | if (!may_stop) | |
3255 | { | |
3256 | warning (_("May not interrupt or stop the target, ignoring attempt")); | |
3257 | return; | |
3258 | } | |
3259 | ||
8b88a78e | 3260 | current_top_target ()->interrupt (); |
bfedc46a PA |
3261 | } |
3262 | ||
abc56d60 PA |
3263 | /* See target.h. */ |
3264 | ||
93692b58 PA |
3265 | void |
3266 | target_pass_ctrlc (void) | |
3267 | { | |
5b6d1e4f PA |
3268 | /* Pass the Ctrl-C to the first target that has a thread |
3269 | running. */ | |
3270 | for (inferior *inf : all_inferiors ()) | |
3271 | { | |
3272 | target_ops *proc_target = inf->process_target (); | |
3273 | if (proc_target == NULL) | |
3274 | continue; | |
3275 | ||
43667cc6 | 3276 | for (thread_info *thr : inf->non_exited_threads ()) |
5b6d1e4f PA |
3277 | { |
3278 | /* A thread can be THREAD_STOPPED and executing, while | |
3279 | running an infcall. */ | |
3280 | if (thr->state == THREAD_RUNNING || thr->executing) | |
3281 | { | |
3282 | /* We can get here quite deep in target layers. Avoid | |
3283 | switching thread context or anything that would | |
3284 | communicate with the target (e.g., to fetch | |
3285 | registers), or flushing e.g., the frame cache. We | |
3286 | just switch inferior in order to be able to call | |
3287 | through the target_stack. */ | |
3288 | scoped_restore_current_inferior restore_inferior; | |
3289 | set_current_inferior (inf); | |
3290 | current_top_target ()->pass_ctrlc (); | |
3291 | return; | |
3292 | } | |
3293 | } | |
3294 | } | |
93692b58 PA |
3295 | } |
3296 | ||
3297 | /* See target.h. */ | |
3298 | ||
3299 | void | |
3300 | default_target_pass_ctrlc (struct target_ops *ops) | |
3301 | { | |
e671cd59 | 3302 | target_interrupt (); |
93692b58 PA |
3303 | } |
3304 | ||
f8c1d06b GB |
3305 | /* See target/target.h. */ |
3306 | ||
3307 | void | |
03f4463b | 3308 | target_stop_and_wait (ptid_t ptid) |
f8c1d06b GB |
3309 | { |
3310 | struct target_waitstatus status; | |
491144b5 | 3311 | bool was_non_stop = non_stop; |
f8c1d06b | 3312 | |
491144b5 | 3313 | non_stop = true; |
f8c1d06b GB |
3314 | target_stop (ptid); |
3315 | ||
3316 | memset (&status, 0, sizeof (status)); | |
3317 | target_wait (ptid, &status, 0); | |
3318 | ||
3319 | non_stop = was_non_stop; | |
3320 | } | |
3321 | ||
3322 | /* See target/target.h. */ | |
3323 | ||
3324 | void | |
03f4463b | 3325 | target_continue_no_signal (ptid_t ptid) |
f8c1d06b GB |
3326 | { |
3327 | target_resume (ptid, 0, GDB_SIGNAL_0); | |
3328 | } | |
3329 | ||
049a8570 SDJ |
3330 | /* See target/target.h. */ |
3331 | ||
3332 | void | |
3333 | target_continue (ptid_t ptid, enum gdb_signal signal) | |
3334 | { | |
3335 | target_resume (ptid, 0, signal); | |
3336 | } | |
3337 | ||
fdbac7d8 | 3338 | /* Concatenate ELEM to LIST, a comma-separated list. */ |
09826ec5 | 3339 | |
09ce46f2 SM |
3340 | static void |
3341 | str_comma_list_concat_elem (std::string *list, const char *elem) | |
09826ec5 | 3342 | { |
09ce46f2 SM |
3343 | if (!list->empty ()) |
3344 | list->append (", "); | |
3345 | ||
3346 | list->append (elem); | |
09826ec5 PA |
3347 | } |
3348 | ||
3349 | /* Helper for target_options_to_string. If OPT is present in | |
3350 | TARGET_OPTIONS, append the OPT_STR (string version of OPT) in RET. | |
09ce46f2 | 3351 | OPT is removed from TARGET_OPTIONS. */ |
09826ec5 | 3352 | |
09ce46f2 | 3353 | static void |
b60cea74 TT |
3354 | do_option (target_wait_flags *target_options, std::string *ret, |
3355 | target_wait_flag opt, const char *opt_str) | |
09826ec5 PA |
3356 | { |
3357 | if ((*target_options & opt) != 0) | |
3358 | { | |
09ce46f2 | 3359 | str_comma_list_concat_elem (ret, opt_str); |
09826ec5 PA |
3360 | *target_options &= ~opt; |
3361 | } | |
09826ec5 PA |
3362 | } |
3363 | ||
fdbac7d8 SM |
3364 | /* See target.h. */ |
3365 | ||
09ce46f2 | 3366 | std::string |
b60cea74 | 3367 | target_options_to_string (target_wait_flags target_options) |
09826ec5 | 3368 | { |
09ce46f2 | 3369 | std::string ret; |
09826ec5 PA |
3370 | |
3371 | #define DO_TARG_OPTION(OPT) \ | |
09ce46f2 | 3372 | do_option (&target_options, &ret, OPT, #OPT) |
09826ec5 PA |
3373 | |
3374 | DO_TARG_OPTION (TARGET_WNOHANG); | |
3375 | ||
3376 | if (target_options != 0) | |
09ce46f2 | 3377 | str_comma_list_concat_elem (&ret, "unknown???"); |
09826ec5 | 3378 | |
09826ec5 PA |
3379 | return ret; |
3380 | } | |
3381 | ||
28439f5e PA |
3382 | void |
3383 | target_fetch_registers (struct regcache *regcache, int regno) | |
c906108c | 3384 | { |
8b88a78e | 3385 | current_top_target ()->fetch_registers (regcache, regno); |
ad5989bd | 3386 | if (targetdebug) |
ef79d9a3 | 3387 | regcache->debug_print_register ("target_fetch_registers", regno); |
c906108c SS |
3388 | } |
3389 | ||
28439f5e PA |
3390 | void |
3391 | target_store_registers (struct regcache *regcache, int regno) | |
c906108c | 3392 | { |
d914c394 SS |
3393 | if (!may_write_registers) |
3394 | error (_("Writing to registers is not allowed (regno %d)"), regno); | |
3395 | ||
8b88a78e | 3396 | current_top_target ()->store_registers (regcache, regno); |
6b84065d | 3397 | if (targetdebug) |
28439f5e | 3398 | { |
ef79d9a3 | 3399 | regcache->debug_print_register ("target_store_registers", regno); |
28439f5e | 3400 | } |
c906108c SS |
3401 | } |
3402 | ||
dc146f7c VP |
3403 | int |
3404 | target_core_of_thread (ptid_t ptid) | |
3405 | { | |
8b88a78e | 3406 | return current_top_target ()->core_of_thread (ptid); |
dc146f7c VP |
3407 | } |
3408 | ||
936d2992 PA |
3409 | int |
3410 | simple_verify_memory (struct target_ops *ops, | |
3411 | const gdb_byte *data, CORE_ADDR lma, ULONGEST size) | |
3412 | { | |
3413 | LONGEST total_xfered = 0; | |
3414 | ||
3415 | while (total_xfered < size) | |
3416 | { | |
3417 | ULONGEST xfered_len; | |
3418 | enum target_xfer_status status; | |
3419 | gdb_byte buf[1024]; | |
768adc05 | 3420 | ULONGEST howmuch = std::min<ULONGEST> (sizeof (buf), size - total_xfered); |
936d2992 PA |
3421 | |
3422 | status = target_xfer_partial (ops, TARGET_OBJECT_MEMORY, NULL, | |
3423 | buf, NULL, lma + total_xfered, howmuch, | |
3424 | &xfered_len); | |
3425 | if (status == TARGET_XFER_OK | |
3426 | && memcmp (data + total_xfered, buf, xfered_len) == 0) | |
3427 | { | |
3428 | total_xfered += xfered_len; | |
3429 | QUIT; | |
3430 | } | |
3431 | else | |
3432 | return 0; | |
3433 | } | |
3434 | return 1; | |
3435 | } | |
3436 | ||
3437 | /* Default implementation of memory verification. */ | |
3438 | ||
3439 | static int | |
3440 | default_verify_memory (struct target_ops *self, | |
3441 | const gdb_byte *data, CORE_ADDR memaddr, ULONGEST size) | |
3442 | { | |
3443 | /* Start over from the top of the target stack. */ | |
8b88a78e | 3444 | return simple_verify_memory (current_top_target (), |
936d2992 PA |
3445 | data, memaddr, size); |
3446 | } | |
3447 | ||
4a5e7a5b PA |
3448 | int |
3449 | target_verify_memory (const gdb_byte *data, CORE_ADDR memaddr, ULONGEST size) | |
3450 | { | |
8b88a78e | 3451 | return current_top_target ()->verify_memory (data, memaddr, size); |
4a5e7a5b PA |
3452 | } |
3453 | ||
9c06b0b4 TJB |
3454 | /* The documentation for this function is in its prototype declaration in |
3455 | target.h. */ | |
3456 | ||
3457 | int | |
f4b0a671 SM |
3458 | target_insert_mask_watchpoint (CORE_ADDR addr, CORE_ADDR mask, |
3459 | enum target_hw_bp_type rw) | |
9c06b0b4 | 3460 | { |
8b88a78e | 3461 | return current_top_target ()->insert_mask_watchpoint (addr, mask, rw); |
9c06b0b4 TJB |
3462 | } |
3463 | ||
3464 | /* The documentation for this function is in its prototype declaration in | |
3465 | target.h. */ | |
3466 | ||
3467 | int | |
f4b0a671 SM |
3468 | target_remove_mask_watchpoint (CORE_ADDR addr, CORE_ADDR mask, |
3469 | enum target_hw_bp_type rw) | |
9c06b0b4 | 3470 | { |
8b88a78e | 3471 | return current_top_target ()->remove_mask_watchpoint (addr, mask, rw); |
9c06b0b4 TJB |
3472 | } |
3473 | ||
3474 | /* The documentation for this function is in its prototype declaration | |
3475 | in target.h. */ | |
3476 | ||
3477 | int | |
3478 | target_masked_watch_num_registers (CORE_ADDR addr, CORE_ADDR mask) | |
3479 | { | |
8b88a78e | 3480 | return current_top_target ()->masked_watch_num_registers (addr, mask); |
9c06b0b4 TJB |
3481 | } |
3482 | ||
f1310107 TJB |
3483 | /* The documentation for this function is in its prototype declaration |
3484 | in target.h. */ | |
3485 | ||
3486 | int | |
3487 | target_ranged_break_num_registers (void) | |
3488 | { | |
8b88a78e | 3489 | return current_top_target ()->ranged_break_num_registers (); |
f1310107 TJB |
3490 | } |
3491 | ||
02d27625 MM |
3492 | /* See target.h. */ |
3493 | ||
02d27625 | 3494 | struct btrace_target_info * |
f4abbc16 | 3495 | target_enable_btrace (ptid_t ptid, const struct btrace_config *conf) |
02d27625 | 3496 | { |
8b88a78e | 3497 | return current_top_target ()->enable_btrace (ptid, conf); |
02d27625 MM |
3498 | } |
3499 | ||
3500 | /* See target.h. */ | |
3501 | ||
3502 | void | |
3503 | target_disable_btrace (struct btrace_target_info *btinfo) | |
3504 | { | |
8b88a78e | 3505 | current_top_target ()->disable_btrace (btinfo); |
02d27625 MM |
3506 | } |
3507 | ||
3508 | /* See target.h. */ | |
3509 | ||
3510 | void | |
3511 | target_teardown_btrace (struct btrace_target_info *btinfo) | |
3512 | { | |
8b88a78e | 3513 | current_top_target ()->teardown_btrace (btinfo); |
02d27625 MM |
3514 | } |
3515 | ||
3516 | /* See target.h. */ | |
3517 | ||
969c39fb | 3518 | enum btrace_error |
734b0e4b | 3519 | target_read_btrace (struct btrace_data *btrace, |
969c39fb | 3520 | struct btrace_target_info *btinfo, |
02d27625 MM |
3521 | enum btrace_read_type type) |
3522 | { | |
8b88a78e | 3523 | return current_top_target ()->read_btrace (btrace, btinfo, type); |
02d27625 MM |
3524 | } |
3525 | ||
d02ed0bb MM |
3526 | /* See target.h. */ |
3527 | ||
f4abbc16 MM |
3528 | const struct btrace_config * |
3529 | target_btrace_conf (const struct btrace_target_info *btinfo) | |
3530 | { | |
8b88a78e | 3531 | return current_top_target ()->btrace_conf (btinfo); |
f4abbc16 MM |
3532 | } |
3533 | ||
3534 | /* See target.h. */ | |
3535 | ||
7c1687a9 MM |
3536 | void |
3537 | target_stop_recording (void) | |
3538 | { | |
8b88a78e | 3539 | current_top_target ()->stop_recording (); |
7c1687a9 MM |
3540 | } |
3541 | ||
3542 | /* See target.h. */ | |
3543 | ||
d02ed0bb | 3544 | void |
85e1311a | 3545 | target_save_record (const char *filename) |
d02ed0bb | 3546 | { |
8b88a78e | 3547 | current_top_target ()->save_record (filename); |
d02ed0bb MM |
3548 | } |
3549 | ||
3550 | /* See target.h. */ | |
3551 | ||
3552 | int | |
f6ac5f3d | 3553 | target_supports_delete_record () |
d02ed0bb | 3554 | { |
8b88a78e | 3555 | return current_top_target ()->supports_delete_record (); |
d02ed0bb MM |
3556 | } |
3557 | ||
3558 | /* See target.h. */ | |
3559 | ||
3560 | void | |
3561 | target_delete_record (void) | |
3562 | { | |
8b88a78e | 3563 | current_top_target ()->delete_record (); |
d02ed0bb MM |
3564 | } |
3565 | ||
3566 | /* See target.h. */ | |
3567 | ||
b158a20f TW |
3568 | enum record_method |
3569 | target_record_method (ptid_t ptid) | |
3570 | { | |
8b88a78e | 3571 | return current_top_target ()->record_method (ptid); |
b158a20f TW |
3572 | } |
3573 | ||
3574 | /* See target.h. */ | |
3575 | ||
d02ed0bb | 3576 | int |
a52eab48 | 3577 | target_record_is_replaying (ptid_t ptid) |
d02ed0bb | 3578 | { |
8b88a78e | 3579 | return current_top_target ()->record_is_replaying (ptid); |
d02ed0bb MM |
3580 | } |
3581 | ||
3582 | /* See target.h. */ | |
3583 | ||
7ff27e9b MM |
3584 | int |
3585 | target_record_will_replay (ptid_t ptid, int dir) | |
3586 | { | |
8b88a78e | 3587 | return current_top_target ()->record_will_replay (ptid, dir); |
7ff27e9b MM |
3588 | } |
3589 | ||
3590 | /* See target.h. */ | |
3591 | ||
797094dd MM |
3592 | void |
3593 | target_record_stop_replaying (void) | |
3594 | { | |
8b88a78e | 3595 | current_top_target ()->record_stop_replaying (); |
797094dd MM |
3596 | } |
3597 | ||
3598 | /* See target.h. */ | |
3599 | ||
d02ed0bb MM |
3600 | void |
3601 | target_goto_record_begin (void) | |
3602 | { | |
8b88a78e | 3603 | current_top_target ()->goto_record_begin (); |
d02ed0bb MM |
3604 | } |
3605 | ||
3606 | /* See target.h. */ | |
3607 | ||
3608 | void | |
3609 | target_goto_record_end (void) | |
3610 | { | |
8b88a78e | 3611 | current_top_target ()->goto_record_end (); |
d02ed0bb MM |
3612 | } |
3613 | ||
3614 | /* See target.h. */ | |
3615 | ||
3616 | void | |
3617 | target_goto_record (ULONGEST insn) | |
3618 | { | |
8b88a78e | 3619 | current_top_target ()->goto_record (insn); |
d02ed0bb MM |
3620 | } |
3621 | ||
67c86d06 MM |
3622 | /* See target.h. */ |
3623 | ||
3624 | void | |
9a24775b | 3625 | target_insn_history (int size, gdb_disassembly_flags flags) |
67c86d06 | 3626 | { |
8b88a78e | 3627 | current_top_target ()->insn_history (size, flags); |
67c86d06 MM |
3628 | } |
3629 | ||
3630 | /* See target.h. */ | |
3631 | ||
3632 | void | |
9a24775b PA |
3633 | target_insn_history_from (ULONGEST from, int size, |
3634 | gdb_disassembly_flags flags) | |
67c86d06 | 3635 | { |
8b88a78e | 3636 | current_top_target ()->insn_history_from (from, size, flags); |
67c86d06 MM |
3637 | } |
3638 | ||
3639 | /* See target.h. */ | |
3640 | ||
3641 | void | |
9a24775b PA |
3642 | target_insn_history_range (ULONGEST begin, ULONGEST end, |
3643 | gdb_disassembly_flags flags) | |
67c86d06 | 3644 | { |
8b88a78e | 3645 | current_top_target ()->insn_history_range (begin, end, flags); |
67c86d06 MM |
3646 | } |
3647 | ||
15984c13 MM |
3648 | /* See target.h. */ |
3649 | ||
3650 | void | |
0cb7c7b0 | 3651 | target_call_history (int size, record_print_flags flags) |
15984c13 | 3652 | { |
8b88a78e | 3653 | current_top_target ()->call_history (size, flags); |
15984c13 MM |
3654 | } |
3655 | ||
3656 | /* See target.h. */ | |
3657 | ||
3658 | void | |
0cb7c7b0 | 3659 | target_call_history_from (ULONGEST begin, int size, record_print_flags flags) |
15984c13 | 3660 | { |
8b88a78e | 3661 | current_top_target ()->call_history_from (begin, size, flags); |
15984c13 MM |
3662 | } |
3663 | ||
3664 | /* See target.h. */ | |
3665 | ||
3666 | void | |
0cb7c7b0 | 3667 | target_call_history_range (ULONGEST begin, ULONGEST end, record_print_flags flags) |
15984c13 | 3668 | { |
8b88a78e | 3669 | current_top_target ()->call_history_range (begin, end, flags); |
15984c13 MM |
3670 | } |
3671 | ||
ea001bdc MM |
3672 | /* See target.h. */ |
3673 | ||
3674 | const struct frame_unwind * | |
3675 | target_get_unwinder (void) | |
3676 | { | |
8b88a78e | 3677 | return current_top_target ()->get_unwinder (); |
ea001bdc MM |
3678 | } |
3679 | ||
3680 | /* See target.h. */ | |
3681 | ||
3682 | const struct frame_unwind * | |
3683 | target_get_tailcall_unwinder (void) | |
3684 | { | |
8b88a78e | 3685 | return current_top_target ()->get_tailcall_unwinder (); |
ea001bdc MM |
3686 | } |
3687 | ||
5fff78c4 MM |
3688 | /* See target.h. */ |
3689 | ||
3690 | void | |
3691 | target_prepare_to_generate_core (void) | |
3692 | { | |
8b88a78e | 3693 | current_top_target ()->prepare_to_generate_core (); |
5fff78c4 MM |
3694 | } |
3695 | ||
3696 | /* See target.h. */ | |
3697 | ||
3698 | void | |
3699 | target_done_generating_core (void) | |
3700 | { | |
8b88a78e | 3701 | current_top_target ()->done_generating_core (); |
5fff78c4 MM |
3702 | } |
3703 | ||
c906108c | 3704 | \f |
c5aa993b JM |
3705 | |
3706 | static char targ_desc[] = | |
3e43a32a MS |
3707 | "Names of targets and files being debugged.\nShows the entire \ |
3708 | stack of targets currently in use (including the exec-file,\n\ | |
c906108c SS |
3709 | core-file, and process, if any), as well as the symbol file name."; |
3710 | ||
a53f3625 | 3711 | static void |
a30bf1f1 TT |
3712 | default_rcmd (struct target_ops *self, const char *command, |
3713 | struct ui_file *output) | |
a53f3625 TT |
3714 | { |
3715 | error (_("\"monitor\" command not supported by this target.")); | |
3716 | } | |
3717 | ||
96baa820 | 3718 | static void |
0b39b52e | 3719 | do_monitor_command (const char *cmd, int from_tty) |
96baa820 | 3720 | { |
96baa820 JM |
3721 | target_rcmd (cmd, gdb_stdtarg); |
3722 | } | |
3723 | ||
78cbbba8 LM |
3724 | /* Erases all the memory regions marked as flash. CMD and FROM_TTY are |
3725 | ignored. */ | |
3726 | ||
3727 | void | |
0b39b52e | 3728 | flash_erase_command (const char *cmd, int from_tty) |
78cbbba8 LM |
3729 | { |
3730 | /* Used to communicate termination of flash operations to the target. */ | |
3731 | bool found_flash_region = false; | |
78cbbba8 LM |
3732 | struct gdbarch *gdbarch = target_gdbarch (); |
3733 | ||
a664f67e | 3734 | std::vector<mem_region> mem_regions = target_memory_map (); |
78cbbba8 LM |
3735 | |
3736 | /* Iterate over all memory regions. */ | |
a664f67e | 3737 | for (const mem_region &m : mem_regions) |
78cbbba8 | 3738 | { |
78cbbba8 | 3739 | /* Is this a flash memory region? */ |
a664f67e | 3740 | if (m.attrib.mode == MEM_FLASH) |
78cbbba8 LM |
3741 | { |
3742 | found_flash_region = true; | |
a664f67e | 3743 | target_flash_erase (m.lo, m.hi - m.lo); |
78cbbba8 | 3744 | |
76f9c9cf | 3745 | ui_out_emit_tuple tuple_emitter (current_uiout, "erased-regions"); |
78cbbba8 LM |
3746 | |
3747 | current_uiout->message (_("Erasing flash memory region at address ")); | |
ca8d69be | 3748 | current_uiout->field_core_addr ("address", gdbarch, m.lo); |
78cbbba8 | 3749 | current_uiout->message (", size = "); |
33eca680 | 3750 | current_uiout->field_string ("size", hex_string (m.hi - m.lo)); |
78cbbba8 | 3751 | current_uiout->message ("\n"); |
78cbbba8 LM |
3752 | } |
3753 | } | |
3754 | ||
3755 | /* Did we do any flash operations? If so, we need to finalize them. */ | |
3756 | if (found_flash_region) | |
3757 | target_flash_done (); | |
3758 | else | |
3759 | current_uiout->message (_("No flash memory regions found.\n")); | |
3760 | } | |
3761 | ||
87680a14 JB |
3762 | /* Print the name of each layers of our target stack. */ |
3763 | ||
3764 | static void | |
d3cb6b99 | 3765 | maintenance_print_target_stack (const char *cmd, int from_tty) |
87680a14 | 3766 | { |
87680a14 JB |
3767 | printf_filtered (_("The current target stack is:\n")); |
3768 | ||
b6a8c27b | 3769 | for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
87680a14 | 3770 | { |
66b4deae | 3771 | if (t->stratum () == debug_stratum) |
f6ac5f3d PA |
3772 | continue; |
3773 | printf_filtered (" - %s (%s)\n", t->shortname (), t->longname ()); | |
87680a14 JB |
3774 | } |
3775 | } | |
3776 | ||
372316f1 PA |
3777 | /* See target.h. */ |
3778 | ||
3779 | void | |
3780 | target_async (int enable) | |
3781 | { | |
3782 | infrun_async (enable); | |
8b88a78e | 3783 | current_top_target ()->async (enable); |
372316f1 PA |
3784 | } |
3785 | ||
65706a29 PA |
3786 | /* See target.h. */ |
3787 | ||
3788 | void | |
3789 | target_thread_events (int enable) | |
3790 | { | |
8b88a78e | 3791 | current_top_target ()->thread_events (enable); |
65706a29 PA |
3792 | } |
3793 | ||
329ea579 PA |
3794 | /* Controls if targets can report that they can/are async. This is |
3795 | just for maintainers to use when debugging gdb. */ | |
491144b5 | 3796 | bool target_async_permitted = true; |
c6ebd6cf VP |
3797 | |
3798 | /* The set command writes to this variable. If the inferior is | |
b5419e49 | 3799 | executing, target_async_permitted is *not* updated. */ |
491144b5 | 3800 | static bool target_async_permitted_1 = true; |
c6ebd6cf VP |
3801 | |
3802 | static void | |
eb4c3f4a | 3803 | maint_set_target_async_command (const char *args, int from_tty, |
329ea579 | 3804 | struct cmd_list_element *c) |
c6ebd6cf | 3805 | { |
c35b1492 | 3806 | if (have_live_inferiors ()) |
c6ebd6cf VP |
3807 | { |
3808 | target_async_permitted_1 = target_async_permitted; | |
3809 | error (_("Cannot change this setting while the inferior is running.")); | |
3810 | } | |
3811 | ||
3812 | target_async_permitted = target_async_permitted_1; | |
3813 | } | |
3814 | ||
3815 | static void | |
329ea579 PA |
3816 | maint_show_target_async_command (struct ui_file *file, int from_tty, |
3817 | struct cmd_list_element *c, | |
3818 | const char *value) | |
c6ebd6cf | 3819 | { |
3e43a32a MS |
3820 | fprintf_filtered (file, |
3821 | _("Controlling the inferior in " | |
3822 | "asynchronous mode is %s.\n"), value); | |
c6ebd6cf VP |
3823 | } |
3824 | ||
fbea99ea PA |
3825 | /* Return true if the target operates in non-stop mode even with "set |
3826 | non-stop off". */ | |
3827 | ||
3828 | static int | |
3829 | target_always_non_stop_p (void) | |
3830 | { | |
8b88a78e | 3831 | return current_top_target ()->always_non_stop_p (); |
fbea99ea PA |
3832 | } |
3833 | ||
3834 | /* See target.h. */ | |
3835 | ||
3836 | int | |
3837 | target_is_non_stop_p (void) | |
3838 | { | |
3839 | return (non_stop | |
3840 | || target_non_stop_enabled == AUTO_BOOLEAN_TRUE | |
3841 | || (target_non_stop_enabled == AUTO_BOOLEAN_AUTO | |
3842 | && target_always_non_stop_p ())); | |
3843 | } | |
3844 | ||
a0714d30 TBA |
3845 | /* See target.h. */ |
3846 | ||
3847 | bool | |
3848 | exists_non_stop_target () | |
3849 | { | |
3850 | if (target_is_non_stop_p ()) | |
3851 | return true; | |
3852 | ||
3853 | scoped_restore_current_thread restore_thread; | |
3854 | ||
3855 | for (inferior *inf : all_inferiors ()) | |
3856 | { | |
3857 | switch_to_inferior_no_thread (inf); | |
3858 | if (target_is_non_stop_p ()) | |
3859 | return true; | |
3860 | } | |
3861 | ||
3862 | return false; | |
3863 | } | |
3864 | ||
fbea99ea PA |
3865 | /* Controls if targets can report that they always run in non-stop |
3866 | mode. This is just for maintainers to use when debugging gdb. */ | |
3867 | enum auto_boolean target_non_stop_enabled = AUTO_BOOLEAN_AUTO; | |
3868 | ||
3869 | /* The set command writes to this variable. If the inferior is | |
3870 | executing, target_non_stop_enabled is *not* updated. */ | |
3871 | static enum auto_boolean target_non_stop_enabled_1 = AUTO_BOOLEAN_AUTO; | |
3872 | ||
3873 | /* Implementation of "maint set target-non-stop". */ | |
3874 | ||
3875 | static void | |
eb4c3f4a | 3876 | maint_set_target_non_stop_command (const char *args, int from_tty, |
fbea99ea PA |
3877 | struct cmd_list_element *c) |
3878 | { | |
3879 | if (have_live_inferiors ()) | |
3880 | { | |
3881 | target_non_stop_enabled_1 = target_non_stop_enabled; | |
3882 | error (_("Cannot change this setting while the inferior is running.")); | |
3883 | } | |
3884 | ||
3885 | target_non_stop_enabled = target_non_stop_enabled_1; | |
3886 | } | |
3887 | ||
3888 | /* Implementation of "maint show target-non-stop". */ | |
3889 | ||
3890 | static void | |
3891 | maint_show_target_non_stop_command (struct ui_file *file, int from_tty, | |
3892 | struct cmd_list_element *c, | |
3893 | const char *value) | |
3894 | { | |
3895 | if (target_non_stop_enabled == AUTO_BOOLEAN_AUTO) | |
3896 | fprintf_filtered (file, | |
3897 | _("Whether the target is always in non-stop mode " | |
3898 | "is %s (currently %s).\n"), value, | |
3899 | target_always_non_stop_p () ? "on" : "off"); | |
3900 | else | |
3901 | fprintf_filtered (file, | |
3902 | _("Whether the target is always in non-stop mode " | |
3903 | "is %s.\n"), value); | |
3904 | } | |
3905 | ||
d914c394 SS |
3906 | /* Temporary copies of permission settings. */ |
3907 | ||
491144b5 CB |
3908 | static bool may_write_registers_1 = true; |
3909 | static bool may_write_memory_1 = true; | |
3910 | static bool may_insert_breakpoints_1 = true; | |
3911 | static bool may_insert_tracepoints_1 = true; | |
3912 | static bool may_insert_fast_tracepoints_1 = true; | |
3913 | static bool may_stop_1 = true; | |
d914c394 SS |
3914 | |
3915 | /* Make the user-set values match the real values again. */ | |
3916 | ||
3917 | void | |
3918 | update_target_permissions (void) | |
3919 | { | |
3920 | may_write_registers_1 = may_write_registers; | |
3921 | may_write_memory_1 = may_write_memory; | |
3922 | may_insert_breakpoints_1 = may_insert_breakpoints; | |
3923 | may_insert_tracepoints_1 = may_insert_tracepoints; | |
3924 | may_insert_fast_tracepoints_1 = may_insert_fast_tracepoints; | |
3925 | may_stop_1 = may_stop; | |
3926 | } | |
3927 | ||
3928 | /* The one function handles (most of) the permission flags in the same | |
3929 | way. */ | |
3930 | ||
3931 | static void | |
eb4c3f4a | 3932 | set_target_permissions (const char *args, int from_tty, |
d914c394 SS |
3933 | struct cmd_list_element *c) |
3934 | { | |
3935 | if (target_has_execution) | |
3936 | { | |
3937 | update_target_permissions (); | |
3938 | error (_("Cannot change this setting while the inferior is running.")); | |
3939 | } | |
3940 | ||
3941 | /* Make the real values match the user-changed values. */ | |
3942 | may_write_registers = may_write_registers_1; | |
3943 | may_insert_breakpoints = may_insert_breakpoints_1; | |
3944 | may_insert_tracepoints = may_insert_tracepoints_1; | |
3945 | may_insert_fast_tracepoints = may_insert_fast_tracepoints_1; | |
3946 | may_stop = may_stop_1; | |
3947 | update_observer_mode (); | |
3948 | } | |
3949 | ||
3950 | /* Set memory write permission independently of observer mode. */ | |
3951 | ||
3952 | static void | |
eb4c3f4a | 3953 | set_write_memory_permission (const char *args, int from_tty, |
d914c394 SS |
3954 | struct cmd_list_element *c) |
3955 | { | |
3956 | /* Make the real values match the user-changed values. */ | |
3957 | may_write_memory = may_write_memory_1; | |
3958 | update_observer_mode (); | |
3959 | } | |
3960 | ||
6c265988 SM |
3961 | void _initialize_target (); |
3962 | ||
c906108c | 3963 | void |
5b6d1e4f | 3964 | _initialize_target () |
c906108c | 3965 | { |
f6ac5f3d | 3966 | the_debug_target = new debug_target (); |
c906108c | 3967 | |
11db9430 SM |
3968 | add_info ("target", info_target_command, targ_desc); |
3969 | add_info ("files", info_target_command, targ_desc); | |
c906108c | 3970 | |
ccce17b0 | 3971 | add_setshow_zuinteger_cmd ("target", class_maintenance, &targetdebug, _("\ |
85c07804 AC |
3972 | Set target debugging."), _("\ |
3973 | Show target debugging."), _("\ | |
333dabeb | 3974 | When non-zero, target debugging is enabled. Higher numbers are more\n\ |
3cecbbbe TT |
3975 | verbose."), |
3976 | set_targetdebug, | |
ccce17b0 YQ |
3977 | show_targetdebug, |
3978 | &setdebuglist, &showdebuglist); | |
3a11626d | 3979 | |
2bc416ba | 3980 | add_setshow_boolean_cmd ("trust-readonly-sections", class_support, |
7915a72c AC |
3981 | &trust_readonly, _("\ |
3982 | Set mode for reading from readonly sections."), _("\ | |
3983 | Show mode for reading from readonly sections."), _("\ | |
3a11626d MS |
3984 | When this mode is on, memory reads from readonly sections (such as .text)\n\ |
3985 | will be read from the object file instead of from the target. This will\n\ | |
7915a72c | 3986 | result in significant performance improvement for remote targets."), |
2c5b56ce | 3987 | NULL, |
920d2a44 | 3988 | show_trust_readonly, |
e707bbc2 | 3989 | &setlist, &showlist); |
96baa820 JM |
3990 | |
3991 | add_com ("monitor", class_obscure, do_monitor_command, | |
1bedd215 | 3992 | _("Send a command to the remote monitor (remote targets only).")); |
96baa820 | 3993 | |
87680a14 JB |
3994 | add_cmd ("target-stack", class_maintenance, maintenance_print_target_stack, |
3995 | _("Print the name of each layer of the internal target stack."), | |
3996 | &maintenanceprintlist); | |
3997 | ||
c6ebd6cf VP |
3998 | add_setshow_boolean_cmd ("target-async", no_class, |
3999 | &target_async_permitted_1, _("\ | |
4000 | Set whether gdb controls the inferior in asynchronous mode."), _("\ | |
4001 | Show whether gdb controls the inferior in asynchronous mode."), _("\ | |
4002 | Tells gdb whether to control the inferior in asynchronous mode."), | |
329ea579 PA |
4003 | maint_set_target_async_command, |
4004 | maint_show_target_async_command, | |
4005 | &maintenance_set_cmdlist, | |
4006 | &maintenance_show_cmdlist); | |
c6ebd6cf | 4007 | |
fbea99ea PA |
4008 | add_setshow_auto_boolean_cmd ("target-non-stop", no_class, |
4009 | &target_non_stop_enabled_1, _("\ | |
4010 | Set whether gdb always controls the inferior in non-stop mode."), _("\ | |
4011 | Show whether gdb always controls the inferior in non-stop mode."), _("\ | |
4012 | Tells gdb whether to control the inferior in non-stop mode."), | |
4013 | maint_set_target_non_stop_command, | |
4014 | maint_show_target_non_stop_command, | |
4015 | &maintenance_set_cmdlist, | |
4016 | &maintenance_show_cmdlist); | |
4017 | ||
d914c394 SS |
4018 | add_setshow_boolean_cmd ("may-write-registers", class_support, |
4019 | &may_write_registers_1, _("\ | |
4020 | Set permission to write into registers."), _("\ | |
4021 | Show permission to write into registers."), _("\ | |
4022 | When this permission is on, GDB may write into the target's registers.\n\ | |
4023 | Otherwise, any sort of write attempt will result in an error."), | |
4024 | set_target_permissions, NULL, | |
4025 | &setlist, &showlist); | |
4026 | ||
4027 | add_setshow_boolean_cmd ("may-write-memory", class_support, | |
4028 | &may_write_memory_1, _("\ | |
4029 | Set permission to write into target memory."), _("\ | |
4030 | Show permission to write into target memory."), _("\ | |
4031 | When this permission is on, GDB may write into the target's memory.\n\ | |
4032 | Otherwise, any sort of write attempt will result in an error."), | |
4033 | set_write_memory_permission, NULL, | |
4034 | &setlist, &showlist); | |
4035 | ||
4036 | add_setshow_boolean_cmd ("may-insert-breakpoints", class_support, | |
4037 | &may_insert_breakpoints_1, _("\ | |
4038 | Set permission to insert breakpoints in the target."), _("\ | |
4039 | Show permission to insert breakpoints in the target."), _("\ | |
4040 | When this permission is on, GDB may insert breakpoints in the program.\n\ | |
4041 | Otherwise, any sort of insertion attempt will result in an error."), | |
4042 | set_target_permissions, NULL, | |
4043 | &setlist, &showlist); | |
4044 | ||
4045 | add_setshow_boolean_cmd ("may-insert-tracepoints", class_support, | |
4046 | &may_insert_tracepoints_1, _("\ | |
4047 | Set permission to insert tracepoints in the target."), _("\ | |
4048 | Show permission to insert tracepoints in the target."), _("\ | |
4049 | When this permission is on, GDB may insert tracepoints in the program.\n\ | |
4050 | Otherwise, any sort of insertion attempt will result in an error."), | |
4051 | set_target_permissions, NULL, | |
4052 | &setlist, &showlist); | |
4053 | ||
4054 | add_setshow_boolean_cmd ("may-insert-fast-tracepoints", class_support, | |
4055 | &may_insert_fast_tracepoints_1, _("\ | |
4056 | Set permission to insert fast tracepoints in the target."), _("\ | |
4057 | Show permission to insert fast tracepoints in the target."), _("\ | |
4058 | When this permission is on, GDB may insert fast tracepoints.\n\ | |
4059 | Otherwise, any sort of insertion attempt will result in an error."), | |
4060 | set_target_permissions, NULL, | |
4061 | &setlist, &showlist); | |
4062 | ||
4063 | add_setshow_boolean_cmd ("may-interrupt", class_support, | |
4064 | &may_stop_1, _("\ | |
4065 | Set permission to interrupt or signal the target."), _("\ | |
4066 | Show permission to interrupt or signal the target."), _("\ | |
4067 | When this permission is on, GDB may interrupt/stop the target's execution.\n\ | |
4068 | Otherwise, any attempt to interrupt or stop will be ignored."), | |
4069 | set_target_permissions, NULL, | |
4070 | &setlist, &showlist); | |
6a3cb8e8 | 4071 | |
78cbbba8 LM |
4072 | add_com ("flash-erase", no_class, flash_erase_command, |
4073 | _("Erase all flash memory regions.")); | |
4074 | ||
6a3cb8e8 PA |
4075 | add_setshow_boolean_cmd ("auto-connect-native-target", class_support, |
4076 | &auto_connect_native_target, _("\ | |
4077 | Set whether GDB may automatically connect to the native target."), _("\ | |
4078 | Show whether GDB may automatically connect to the native target."), _("\ | |
4079 | When on, and GDB is not connected to a target yet, GDB\n\ | |
4080 | attempts \"run\" and other commands with the native target."), | |
4081 | NULL, show_auto_connect_native_target, | |
4082 | &setlist, &showlist); | |
c906108c | 4083 | } |