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> |
c906108c | 52 | |
f0f9ff95 TT |
53 | static void generic_tls_error (void) ATTRIBUTE_NORETURN; |
54 | ||
0a4f40a2 | 55 | static void default_terminal_info (struct target_ops *, const char *, int); |
c906108c | 56 | |
5009afc5 AS |
57 | static int default_watchpoint_addr_within_range (struct target_ops *, |
58 | CORE_ADDR, CORE_ADDR, int); | |
59 | ||
31568a15 TT |
60 | static int default_region_ok_for_hw_watchpoint (struct target_ops *, |
61 | CORE_ADDR, int); | |
e0d24f8d | 62 | |
a30bf1f1 | 63 | static void default_rcmd (struct target_ops *, const char *, struct ui_file *); |
a53f3625 | 64 | |
4229b31d TT |
65 | static ptid_t default_get_ada_task_ptid (struct target_ops *self, |
66 | long lwp, long tid); | |
67 | ||
098dba18 TT |
68 | static int default_follow_fork (struct target_ops *self, int follow_child, |
69 | int detach_fork); | |
70 | ||
8d657035 TT |
71 | static void default_mourn_inferior (struct target_ops *self); |
72 | ||
58a5184e TT |
73 | static int default_search_memory (struct target_ops *ops, |
74 | CORE_ADDR start_addr, | |
75 | ULONGEST search_space_len, | |
76 | const gdb_byte *pattern, | |
77 | ULONGEST pattern_len, | |
78 | CORE_ADDR *found_addrp); | |
79 | ||
936d2992 PA |
80 | static int default_verify_memory (struct target_ops *self, |
81 | const gdb_byte *data, | |
82 | CORE_ADDR memaddr, ULONGEST size); | |
83 | ||
c25c4a8b | 84 | static void tcomplain (void) ATTRIBUTE_NORETURN; |
c906108c | 85 | |
a121b7c1 | 86 | static struct target_ops *find_default_run_target (const char *); |
c906108c | 87 | |
0b5a2719 TT |
88 | static int dummy_find_memory_regions (struct target_ops *self, |
89 | find_memory_region_ftype ignore1, | |
90 | void *ignore2); | |
91 | ||
16f796b1 TT |
92 | static char *dummy_make_corefile_notes (struct target_ops *self, |
93 | bfd *ignore1, int *ignore2); | |
94 | ||
a068643d | 95 | static std::string default_pid_to_str (struct target_ops *ops, ptid_t ptid); |
770234d3 | 96 | |
fe31bf5b TT |
97 | static enum exec_direction_kind default_execution_direction |
98 | (struct target_ops *self); | |
99 | ||
d9f719f1 PA |
100 | /* Mapping between target_info objects (which have address identity) |
101 | and corresponding open/factory function/callback. Each add_target | |
102 | call adds one entry to this map, and registers a "target | |
103 | TARGET_NAME" command that when invoked calls the factory registered | |
104 | here. The target_info object is associated with the command via | |
105 | the command's context. */ | |
106 | static std::unordered_map<const target_info *, target_open_ftype *> | |
107 | target_factories; | |
c906108c | 108 | |
06b5b831 | 109 | /* The singleton debug target. */ |
c906108c | 110 | |
f6ac5f3d | 111 | static struct target_ops *the_debug_target; |
c906108c SS |
112 | |
113 | /* Top of target stack. */ | |
c906108c SS |
114 | /* The target structure we are currently using to talk to a process |
115 | or file or whatever "inferior" we have. */ | |
116 | ||
8b88a78e PA |
117 | target_ops * |
118 | current_top_target () | |
119 | { | |
5b6d1e4f | 120 | return current_inferior ()->top_target (); |
8b88a78e | 121 | } |
c906108c SS |
122 | |
123 | /* Command list for target. */ | |
124 | ||
125 | static struct cmd_list_element *targetlist = NULL; | |
126 | ||
491144b5 | 127 | /* True if we should trust readonly sections from the |
cf7a04e8 DJ |
128 | executable when reading memory. */ |
129 | ||
491144b5 | 130 | static bool trust_readonly = false; |
cf7a04e8 | 131 | |
8defab1a DJ |
132 | /* Nonzero if we should show true memory content including |
133 | memory breakpoint inserted by gdb. */ | |
134 | ||
135 | static int show_memory_breakpoints = 0; | |
136 | ||
d914c394 SS |
137 | /* These globals control whether GDB attempts to perform these |
138 | operations; they are useful for targets that need to prevent | |
30baf67b | 139 | inadvertent disruption, such as in non-stop mode. */ |
d914c394 | 140 | |
491144b5 | 141 | bool may_write_registers = true; |
d914c394 | 142 | |
491144b5 | 143 | bool may_write_memory = true; |
d914c394 | 144 | |
491144b5 | 145 | bool may_insert_breakpoints = true; |
d914c394 | 146 | |
491144b5 | 147 | bool may_insert_tracepoints = true; |
d914c394 | 148 | |
491144b5 | 149 | bool may_insert_fast_tracepoints = true; |
d914c394 | 150 | |
491144b5 | 151 | bool may_stop = true; |
d914c394 | 152 | |
c906108c SS |
153 | /* Non-zero if we want to see trace of target level stuff. */ |
154 | ||
ccce17b0 | 155 | static unsigned int targetdebug = 0; |
3cecbbbe TT |
156 | |
157 | static void | |
eb4c3f4a | 158 | set_targetdebug (const char *args, int from_tty, struct cmd_list_element *c) |
3cecbbbe | 159 | { |
f6ac5f3d PA |
160 | if (targetdebug) |
161 | push_target (the_debug_target); | |
162 | else | |
163 | unpush_target (the_debug_target); | |
3cecbbbe TT |
164 | } |
165 | ||
920d2a44 AC |
166 | static void |
167 | show_targetdebug (struct ui_file *file, int from_tty, | |
168 | struct cmd_list_element *c, const char *value) | |
169 | { | |
170 | fprintf_filtered (file, _("Target debugging is %s.\n"), value); | |
171 | } | |
c906108c | 172 | |
c906108c SS |
173 | /* The user just typed 'target' without the name of a target. */ |
174 | ||
c906108c | 175 | static void |
981a3fb3 | 176 | target_command (const char *arg, int from_tty) |
c906108c SS |
177 | { |
178 | fputs_filtered ("Argument required (target name). Try `help target'\n", | |
179 | gdb_stdout); | |
180 | } | |
181 | ||
c35b1492 PA |
182 | int |
183 | target_has_all_memory_1 (void) | |
184 | { | |
b6a8c27b | 185 | for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
f6ac5f3d | 186 | if (t->has_all_memory ()) |
c35b1492 PA |
187 | return 1; |
188 | ||
189 | return 0; | |
190 | } | |
191 | ||
192 | int | |
193 | target_has_memory_1 (void) | |
194 | { | |
b6a8c27b | 195 | for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
f6ac5f3d | 196 | if (t->has_memory ()) |
c35b1492 PA |
197 | return 1; |
198 | ||
199 | return 0; | |
200 | } | |
201 | ||
202 | int | |
203 | target_has_stack_1 (void) | |
204 | { | |
b6a8c27b | 205 | for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
f6ac5f3d | 206 | if (t->has_stack ()) |
c35b1492 PA |
207 | return 1; |
208 | ||
209 | return 0; | |
210 | } | |
211 | ||
212 | int | |
213 | target_has_registers_1 (void) | |
214 | { | |
b6a8c27b | 215 | for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
f6ac5f3d | 216 | if (t->has_registers ()) |
c35b1492 PA |
217 | return 1; |
218 | ||
219 | return 0; | |
220 | } | |
221 | ||
5018ce90 PA |
222 | bool |
223 | target_has_execution_1 (inferior *inf) | |
c35b1492 | 224 | { |
5b6d1e4f PA |
225 | for (target_ops *t = inf->top_target (); |
226 | t != nullptr; | |
227 | t = inf->find_target_beneath (t)) | |
5018ce90 PA |
228 | if (t->has_execution (inf)) |
229 | return true; | |
c35b1492 | 230 | |
5018ce90 | 231 | return false; |
c35b1492 PA |
232 | } |
233 | ||
aeaec162 TT |
234 | int |
235 | target_has_execution_current (void) | |
236 | { | |
5018ce90 | 237 | return target_has_execution_1 (current_inferior ()); |
aeaec162 TT |
238 | } |
239 | ||
8981c758 TT |
240 | /* This is used to implement the various target commands. */ |
241 | ||
242 | static void | |
eb4c3f4a | 243 | open_target (const char *args, int from_tty, struct cmd_list_element *command) |
8981c758 | 244 | { |
d9f719f1 PA |
245 | auto *ti = static_cast<target_info *> (get_cmd_context (command)); |
246 | target_open_ftype *func = target_factories[ti]; | |
8981c758 TT |
247 | |
248 | if (targetdebug) | |
d9f719f1 PA |
249 | fprintf_unfiltered (gdb_stdlog, "-> %s->open (...)\n", |
250 | ti->shortname); | |
8981c758 | 251 | |
d9f719f1 | 252 | func (args, from_tty); |
8981c758 TT |
253 | |
254 | if (targetdebug) | |
d9f719f1 PA |
255 | fprintf_unfiltered (gdb_stdlog, "<- %s->open (%s, %d)\n", |
256 | ti->shortname, args, from_tty); | |
8981c758 TT |
257 | } |
258 | ||
d9f719f1 | 259 | /* See target.h. */ |
c22a2b88 TT |
260 | |
261 | void | |
d9f719f1 PA |
262 | add_target (const target_info &t, target_open_ftype *func, |
263 | completer_ftype *completer) | |
c22a2b88 TT |
264 | { |
265 | struct cmd_list_element *c; | |
266 | ||
d9f719f1 PA |
267 | auto &func_slot = target_factories[&t]; |
268 | if (func_slot != nullptr) | |
269 | internal_error (__FILE__, __LINE__, | |
270 | _("target already added (\"%s\")."), t.shortname); | |
271 | func_slot = func; | |
c906108c SS |
272 | |
273 | if (targetlist == NULL) | |
1bedd215 AC |
274 | add_prefix_cmd ("target", class_run, target_command, _("\ |
275 | Connect to a target machine or process.\n\ | |
c906108c SS |
276 | The first argument is the type or protocol of the target machine.\n\ |
277 | Remaining arguments are interpreted by the target protocol. For more\n\ | |
278 | information on the arguments for a particular protocol, type\n\ | |
1bedd215 | 279 | `help target ' followed by the protocol name."), |
c906108c | 280 | &targetlist, "target ", 0, &cmdlist); |
d9f719f1 PA |
281 | c = add_cmd (t.shortname, no_class, t.doc, &targetlist); |
282 | set_cmd_context (c, (void *) &t); | |
8981c758 | 283 | set_cmd_sfunc (c, open_target); |
9852c492 YQ |
284 | if (completer != NULL) |
285 | set_cmd_completer (c, completer); | |
286 | } | |
287 | ||
b48d48eb MM |
288 | /* See target.h. */ |
289 | ||
290 | void | |
d9f719f1 | 291 | add_deprecated_target_alias (const target_info &tinfo, const char *alias) |
b48d48eb MM |
292 | { |
293 | struct cmd_list_element *c; | |
294 | char *alt; | |
295 | ||
296 | /* If we use add_alias_cmd, here, we do not get the deprecated warning, | |
297 | see PR cli/15104. */ | |
d9f719f1 | 298 | c = add_cmd (alias, no_class, tinfo.doc, &targetlist); |
8981c758 | 299 | set_cmd_sfunc (c, open_target); |
d9f719f1 PA |
300 | set_cmd_context (c, (void *) &tinfo); |
301 | alt = xstrprintf ("target %s", tinfo.shortname); | |
b48d48eb MM |
302 | deprecate_cmd (c, alt); |
303 | } | |
304 | ||
c906108c SS |
305 | /* Stub functions */ |
306 | ||
7d85a9c0 JB |
307 | void |
308 | target_kill (void) | |
309 | { | |
8b88a78e | 310 | current_top_target ()->kill (); |
7d85a9c0 JB |
311 | } |
312 | ||
11cf8741 | 313 | void |
9cbe5fff | 314 | target_load (const char *arg, int from_tty) |
11cf8741 | 315 | { |
4e5d721f | 316 | target_dcache_invalidate (); |
8b88a78e | 317 | current_top_target ()->load (arg, from_tty); |
11cf8741 JM |
318 | } |
319 | ||
223ffa71 | 320 | /* Define it. */ |
5842f62a | 321 | |
e671cd59 PA |
322 | target_terminal_state target_terminal::m_terminal_state |
323 | = target_terminal_state::is_ours; | |
5842f62a | 324 | |
223ffa71 | 325 | /* See target/target.h. */ |
5842f62a PA |
326 | |
327 | void | |
223ffa71 | 328 | target_terminal::init (void) |
5842f62a | 329 | { |
8b88a78e | 330 | current_top_target ()->terminal_init (); |
5842f62a | 331 | |
e671cd59 | 332 | m_terminal_state = target_terminal_state::is_ours; |
5842f62a PA |
333 | } |
334 | ||
223ffa71 | 335 | /* See target/target.h. */ |
2f99e8fc | 336 | |
d9d2d8b6 | 337 | void |
223ffa71 | 338 | target_terminal::inferior (void) |
d9d2d8b6 | 339 | { |
41fd2b0f PA |
340 | struct ui *ui = current_ui; |
341 | ||
d9d2d8b6 | 342 | /* A background resume (``run&'') should leave GDB in control of the |
3b12939d PA |
343 | terminal. */ |
344 | if (ui->prompt_state != PROMPT_BLOCKED) | |
d9d2d8b6 PA |
345 | return; |
346 | ||
215d3118 PA |
347 | /* Since we always run the inferior in the main console (unless "set |
348 | inferior-tty" is in effect), when some UI other than the main one | |
223ffa71 TT |
349 | calls target_terminal::inferior, then we leave the main UI's |
350 | terminal settings as is. */ | |
215d3118 PA |
351 | if (ui != main_ui) |
352 | return; | |
353 | ||
d9d2d8b6 PA |
354 | /* If GDB is resuming the inferior in the foreground, install |
355 | inferior's terminal modes. */ | |
e671cd59 PA |
356 | |
357 | struct inferior *inf = current_inferior (); | |
358 | ||
359 | if (inf->terminal_state != target_terminal_state::is_inferior) | |
360 | { | |
8b88a78e | 361 | current_top_target ()->terminal_inferior (); |
e671cd59 PA |
362 | inf->terminal_state = target_terminal_state::is_inferior; |
363 | } | |
364 | ||
365 | m_terminal_state = target_terminal_state::is_inferior; | |
366 | ||
367 | /* If the user hit C-c before, pretend that it was hit right | |
368 | here. */ | |
369 | if (check_quit_flag ()) | |
370 | target_pass_ctrlc (); | |
371 | } | |
372 | ||
373 | /* See target/target.h. */ | |
374 | ||
375 | void | |
376 | target_terminal::restore_inferior (void) | |
377 | { | |
378 | struct ui *ui = current_ui; | |
379 | ||
380 | /* See target_terminal::inferior(). */ | |
381 | if (ui->prompt_state != PROMPT_BLOCKED || ui != main_ui) | |
382 | return; | |
383 | ||
384 | /* Restore the terminal settings of inferiors that were in the | |
385 | foreground but are now ours_for_output due to a temporary | |
386 | target_target::ours_for_output() call. */ | |
387 | ||
388 | { | |
389 | scoped_restore_current_inferior restore_inferior; | |
e671cd59 | 390 | |
84b68c77 | 391 | for (::inferior *inf : all_inferiors ()) |
e671cd59 PA |
392 | { |
393 | if (inf->terminal_state == target_terminal_state::is_ours_for_output) | |
394 | { | |
395 | set_current_inferior (inf); | |
8b88a78e | 396 | current_top_target ()->terminal_inferior (); |
e671cd59 PA |
397 | inf->terminal_state = target_terminal_state::is_inferior; |
398 | } | |
399 | } | |
400 | } | |
401 | ||
402 | m_terminal_state = target_terminal_state::is_inferior; | |
93692b58 PA |
403 | |
404 | /* If the user hit C-c before, pretend that it was hit right | |
405 | here. */ | |
406 | if (check_quit_flag ()) | |
407 | target_pass_ctrlc (); | |
5842f62a PA |
408 | } |
409 | ||
e671cd59 PA |
410 | /* Switch terminal state to DESIRED_STATE, either is_ours, or |
411 | is_ours_for_output. */ | |
412 | ||
413 | static void | |
414 | target_terminal_is_ours_kind (target_terminal_state desired_state) | |
415 | { | |
416 | scoped_restore_current_inferior restore_inferior; | |
e671cd59 PA |
417 | |
418 | /* Must do this in two passes. First, have all inferiors save the | |
419 | current terminal settings. Then, after all inferiors have add a | |
420 | chance to safely save the terminal settings, restore GDB's | |
421 | terminal settings. */ | |
422 | ||
08036331 | 423 | for (inferior *inf : all_inferiors ()) |
e671cd59 PA |
424 | { |
425 | if (inf->terminal_state == target_terminal_state::is_inferior) | |
426 | { | |
427 | set_current_inferior (inf); | |
8b88a78e | 428 | current_top_target ()->terminal_save_inferior (); |
e671cd59 PA |
429 | } |
430 | } | |
431 | ||
08036331 | 432 | for (inferior *inf : all_inferiors ()) |
e671cd59 PA |
433 | { |
434 | /* Note we don't check is_inferior here like above because we | |
435 | need to handle 'is_ours_for_output -> is_ours' too. Careful | |
436 | to never transition from 'is_ours' to 'is_ours_for_output', | |
437 | though. */ | |
438 | if (inf->terminal_state != target_terminal_state::is_ours | |
439 | && inf->terminal_state != desired_state) | |
440 | { | |
441 | set_current_inferior (inf); | |
442 | if (desired_state == target_terminal_state::is_ours) | |
8b88a78e | 443 | current_top_target ()->terminal_ours (); |
e671cd59 | 444 | else if (desired_state == target_terminal_state::is_ours_for_output) |
8b88a78e | 445 | current_top_target ()->terminal_ours_for_output (); |
e671cd59 PA |
446 | else |
447 | gdb_assert_not_reached ("unhandled desired state"); | |
448 | inf->terminal_state = desired_state; | |
449 | } | |
450 | } | |
451 | } | |
452 | ||
223ffa71 | 453 | /* See target/target.h. */ |
5842f62a PA |
454 | |
455 | void | |
223ffa71 | 456 | target_terminal::ours () |
5842f62a | 457 | { |
41fd2b0f PA |
458 | struct ui *ui = current_ui; |
459 | ||
223ffa71 | 460 | /* See target_terminal::inferior. */ |
215d3118 PA |
461 | if (ui != main_ui) |
462 | return; | |
463 | ||
e671cd59 | 464 | if (m_terminal_state == target_terminal_state::is_ours) |
5842f62a PA |
465 | return; |
466 | ||
e671cd59 PA |
467 | target_terminal_is_ours_kind (target_terminal_state::is_ours); |
468 | m_terminal_state = target_terminal_state::is_ours; | |
5842f62a PA |
469 | } |
470 | ||
223ffa71 | 471 | /* See target/target.h. */ |
5842f62a PA |
472 | |
473 | void | |
223ffa71 | 474 | target_terminal::ours_for_output () |
5842f62a | 475 | { |
215d3118 PA |
476 | struct ui *ui = current_ui; |
477 | ||
223ffa71 | 478 | /* See target_terminal::inferior. */ |
215d3118 PA |
479 | if (ui != main_ui) |
480 | return; | |
481 | ||
e671cd59 | 482 | if (!target_terminal::is_inferior ()) |
5842f62a | 483 | return; |
e671cd59 PA |
484 | |
485 | target_terminal_is_ours_kind (target_terminal_state::is_ours_for_output); | |
486 | target_terminal::m_terminal_state = target_terminal_state::is_ours_for_output; | |
d9d2d8b6 | 487 | } |
136d6dae | 488 | |
223ffa71 TT |
489 | /* See target/target.h. */ |
490 | ||
491 | void | |
492 | target_terminal::info (const char *arg, int from_tty) | |
493 | { | |
8b88a78e | 494 | current_top_target ()->terminal_info (arg, from_tty); |
223ffa71 TT |
495 | } |
496 | ||
b0ed115f TT |
497 | /* See target.h. */ |
498 | ||
20f0d60d | 499 | bool |
b0ed115f TT |
500 | target_supports_terminal_ours (void) |
501 | { | |
5b6d1e4f PA |
502 | /* The current top target is the target at the top of the target |
503 | stack of the current inferior. While normally there's always an | |
504 | inferior, we must check for nullptr here because we can get here | |
505 | very early during startup, before the initial inferior is first | |
506 | created. */ | |
507 | inferior *inf = current_inferior (); | |
20f0d60d | 508 | |
5b6d1e4f | 509 | if (inf == nullptr) |
20f0d60d | 510 | return false; |
5b6d1e4f | 511 | return inf->top_target ()->supports_terminal_ours (); |
b0ed115f TT |
512 | } |
513 | ||
c906108c | 514 | static void |
fba45db2 | 515 | tcomplain (void) |
c906108c | 516 | { |
8a3fe4f8 | 517 | error (_("You can't do that when your target is `%s'"), |
8b88a78e | 518 | current_top_target ()->shortname ()); |
c906108c SS |
519 | } |
520 | ||
521 | void | |
fba45db2 | 522 | noprocess (void) |
c906108c | 523 | { |
8a3fe4f8 | 524 | error (_("You can't do that without a process to debug.")); |
c906108c SS |
525 | } |
526 | ||
c906108c | 527 | static void |
0a4f40a2 | 528 | default_terminal_info (struct target_ops *self, const char *args, int from_tty) |
c906108c | 529 | { |
a3f17187 | 530 | printf_unfiltered (_("No saved terminal information.\n")); |
c906108c SS |
531 | } |
532 | ||
0ef643c8 JB |
533 | /* A default implementation for the to_get_ada_task_ptid target method. |
534 | ||
535 | This function builds the PTID by using both LWP and TID as part of | |
536 | the PTID lwp and tid elements. The pid used is the pid of the | |
537 | inferior_ptid. */ | |
538 | ||
2c0b251b | 539 | static ptid_t |
1e6b91a4 | 540 | default_get_ada_task_ptid (struct target_ops *self, long lwp, long tid) |
0ef643c8 | 541 | { |
e99b03dc | 542 | return ptid_t (inferior_ptid.pid (), lwp, tid); |
0ef643c8 JB |
543 | } |
544 | ||
32231432 | 545 | static enum exec_direction_kind |
4c612759 | 546 | default_execution_direction (struct target_ops *self) |
32231432 PA |
547 | { |
548 | if (!target_can_execute_reverse) | |
549 | return EXEC_FORWARD; | |
550 | else if (!target_can_async_p ()) | |
551 | return EXEC_FORWARD; | |
552 | else | |
553 | gdb_assert_not_reached ("\ | |
554 | to_execution_direction must be implemented for reverse async"); | |
555 | } | |
556 | ||
a1740ee1 | 557 | /* See target.h. */ |
c906108c | 558 | |
5b6d1e4f PA |
559 | void |
560 | decref_target (target_ops *t) | |
561 | { | |
562 | t->decref (); | |
563 | if (t->refcount () == 0) | |
564 | target_close (t); | |
565 | } | |
566 | ||
567 | /* See target.h. */ | |
568 | ||
b26a4dcb | 569 | void |
a1740ee1 | 570 | target_stack::push (target_ops *t) |
c906108c | 571 | { |
5b6d1e4f PA |
572 | t->incref (); |
573 | ||
66b4deae PA |
574 | strata stratum = t->stratum (); |
575 | ||
5b6d1e4f PA |
576 | /* If there's already a target at this stratum, remove it. */ |
577 | ||
66b4deae | 578 | if (m_stack[stratum] != NULL) |
494409bb | 579 | unpush (m_stack[stratum]); |
c906108c | 580 | |
a1740ee1 | 581 | /* Now add the new one. */ |
66b4deae | 582 | m_stack[stratum] = t; |
5d502164 | 583 | |
66b4deae PA |
584 | if (m_top < stratum) |
585 | m_top = stratum; | |
a1740ee1 PA |
586 | } |
587 | ||
588 | /* See target.h. */ | |
c906108c | 589 | |
a1740ee1 PA |
590 | void |
591 | push_target (struct target_ops *t) | |
592 | { | |
5b6d1e4f | 593 | current_inferior ()->push_target (t); |
c906108c SS |
594 | } |
595 | ||
5b6d1e4f | 596 | /* See target.h. */ |
dea57a62 TT |
597 | |
598 | void | |
599 | push_target (target_ops_up &&t) | |
600 | { | |
5b6d1e4f | 601 | current_inferior ()->push_target (t.get ()); |
dea57a62 TT |
602 | t.release (); |
603 | } | |
604 | ||
a1740ee1 | 605 | /* See target.h. */ |
c906108c SS |
606 | |
607 | int | |
fba45db2 | 608 | unpush_target (struct target_ops *t) |
a1740ee1 | 609 | { |
5b6d1e4f | 610 | return current_inferior ()->unpush_target (t); |
a1740ee1 PA |
611 | } |
612 | ||
613 | /* See target.h. */ | |
614 | ||
615 | bool | |
616 | target_stack::unpush (target_ops *t) | |
c906108c | 617 | { |
1688cb29 TT |
618 | gdb_assert (t != NULL); |
619 | ||
66b4deae PA |
620 | strata stratum = t->stratum (); |
621 | ||
622 | if (stratum == dummy_stratum) | |
c8d104ad | 623 | internal_error (__FILE__, __LINE__, |
9b20d036 | 624 | _("Attempt to unpush the dummy target")); |
c8d104ad | 625 | |
a1740ee1 PA |
626 | /* Look for the specified target. Note that a target can only occur |
627 | once in the target stack. */ | |
c906108c | 628 | |
66b4deae | 629 | if (m_stack[stratum] != t) |
258b763a | 630 | { |
a1740ee1 PA |
631 | /* If T wasn't pushed, quit. Only open targets should be |
632 | closed. */ | |
633 | return false; | |
258b763a | 634 | } |
c906108c | 635 | |
c378eb4e | 636 | /* Unchain the target. */ |
66b4deae | 637 | m_stack[stratum] = NULL; |
a1740ee1 | 638 | |
66b4deae PA |
639 | if (m_top == stratum) |
640 | m_top = t->beneath ()->stratum (); | |
c906108c | 641 | |
5b6d1e4f PA |
642 | /* Finally close the target, if there are no inferiors |
643 | referencing this target still. Note we do this after unchaining, | |
644 | so any target method calls from within the target_close | |
645 | implementation don't end up in T anymore. Do leave the target | |
646 | open if we have are other inferiors referencing this target | |
647 | still. */ | |
648 | decref_target (t); | |
305436e0 | 649 | |
a1740ee1 | 650 | return true; |
c906108c SS |
651 | } |
652 | ||
915ef8b1 PA |
653 | /* Unpush TARGET and assert that it worked. */ |
654 | ||
655 | static void | |
656 | unpush_target_and_assert (struct target_ops *target) | |
657 | { | |
658 | if (!unpush_target (target)) | |
659 | { | |
660 | fprintf_unfiltered (gdb_stderr, | |
661 | "pop_all_targets couldn't find target %s\n", | |
f6ac5f3d | 662 | target->shortname ()); |
915ef8b1 PA |
663 | internal_error (__FILE__, __LINE__, |
664 | _("failed internal consistency check")); | |
665 | } | |
666 | } | |
667 | ||
aa76d38d | 668 | void |
460014f5 | 669 | pop_all_targets_above (enum strata above_stratum) |
aa76d38d | 670 | { |
66b4deae | 671 | while ((int) (current_top_target ()->stratum ()) > (int) above_stratum) |
8b88a78e | 672 | unpush_target_and_assert (current_top_target ()); |
915ef8b1 PA |
673 | } |
674 | ||
675 | /* See target.h. */ | |
676 | ||
677 | void | |
678 | pop_all_targets_at_and_above (enum strata stratum) | |
679 | { | |
66b4deae | 680 | while ((int) (current_top_target ()->stratum ()) >= (int) stratum) |
8b88a78e | 681 | unpush_target_and_assert (current_top_target ()); |
aa76d38d PA |
682 | } |
683 | ||
87ab71f0 | 684 | void |
460014f5 | 685 | pop_all_targets (void) |
87ab71f0 | 686 | { |
460014f5 | 687 | pop_all_targets_above (dummy_stratum); |
87ab71f0 PA |
688 | } |
689 | ||
5b6d1e4f PA |
690 | /* Return true if T is now pushed in the current inferior's target |
691 | stack. Return false otherwise. */ | |
c0edd9ed | 692 | |
5b6d1e4f PA |
693 | bool |
694 | target_is_pushed (target_ops *t) | |
c0edd9ed | 695 | { |
5b6d1e4f | 696 | return current_inferior ()->target_is_pushed (t); |
c0edd9ed JK |
697 | } |
698 | ||
f0f9ff95 TT |
699 | /* Default implementation of to_get_thread_local_address. */ |
700 | ||
701 | static void | |
702 | generic_tls_error (void) | |
703 | { | |
704 | throw_error (TLS_GENERIC_ERROR, | |
705 | _("Cannot find thread-local variables on this target")); | |
706 | } | |
707 | ||
72f5cf0e | 708 | /* Using the objfile specified in OBJFILE, find the address for the |
9e35dae4 DJ |
709 | current thread's thread-local storage with offset OFFSET. */ |
710 | CORE_ADDR | |
711 | target_translate_tls_address (struct objfile *objfile, CORE_ADDR offset) | |
712 | { | |
713 | volatile CORE_ADDR addr = 0; | |
8b88a78e | 714 | struct target_ops *target = current_top_target (); |
6e056c81 | 715 | struct gdbarch *gdbarch = target_gdbarch (); |
9e35dae4 | 716 | |
6e056c81 | 717 | if (gdbarch_fetch_tls_load_module_address_p (gdbarch)) |
9e35dae4 DJ |
718 | { |
719 | ptid_t ptid = inferior_ptid; | |
9e35dae4 | 720 | |
a70b8144 | 721 | try |
9e35dae4 DJ |
722 | { |
723 | CORE_ADDR lm_addr; | |
724 | ||
725 | /* Fetch the load module address for this objfile. */ | |
6e056c81 | 726 | lm_addr = gdbarch_fetch_tls_load_module_address (gdbarch, |
9e35dae4 | 727 | objfile); |
9e35dae4 | 728 | |
6e056c81 JB |
729 | if (gdbarch_get_thread_local_address_p (gdbarch)) |
730 | addr = gdbarch_get_thread_local_address (gdbarch, ptid, lm_addr, | |
731 | offset); | |
732 | else | |
733 | addr = target->get_thread_local_address (ptid, lm_addr, offset); | |
9e35dae4 DJ |
734 | } |
735 | /* If an error occurred, print TLS related messages here. Otherwise, | |
736 | throw the error to some higher catcher. */ | |
230d2906 | 737 | catch (const gdb_exception &ex) |
9e35dae4 DJ |
738 | { |
739 | int objfile_is_library = (objfile->flags & OBJF_SHARED); | |
740 | ||
741 | switch (ex.error) | |
742 | { | |
743 | case TLS_NO_LIBRARY_SUPPORT_ERROR: | |
3e43a32a MS |
744 | error (_("Cannot find thread-local variables " |
745 | "in this thread library.")); | |
9e35dae4 DJ |
746 | break; |
747 | case TLS_LOAD_MODULE_NOT_FOUND_ERROR: | |
748 | if (objfile_is_library) | |
749 | error (_("Cannot find shared library `%s' in dynamic" | |
4262abfb | 750 | " linker's load module list"), objfile_name (objfile)); |
9e35dae4 DJ |
751 | else |
752 | error (_("Cannot find executable file `%s' in dynamic" | |
4262abfb | 753 | " linker's load module list"), objfile_name (objfile)); |
9e35dae4 DJ |
754 | break; |
755 | case TLS_NOT_ALLOCATED_YET_ERROR: | |
756 | if (objfile_is_library) | |
757 | error (_("The inferior has not yet allocated storage for" | |
758 | " thread-local variables in\n" | |
759 | "the shared library `%s'\n" | |
760 | "for %s"), | |
a068643d TT |
761 | objfile_name (objfile), |
762 | target_pid_to_str (ptid).c_str ()); | |
9e35dae4 DJ |
763 | else |
764 | error (_("The inferior has not yet allocated storage for" | |
765 | " thread-local variables in\n" | |
766 | "the executable `%s'\n" | |
767 | "for %s"), | |
a068643d TT |
768 | objfile_name (objfile), |
769 | target_pid_to_str (ptid).c_str ()); | |
9e35dae4 DJ |
770 | break; |
771 | case TLS_GENERIC_ERROR: | |
772 | if (objfile_is_library) | |
773 | error (_("Cannot find thread-local storage for %s, " | |
774 | "shared library %s:\n%s"), | |
a068643d | 775 | target_pid_to_str (ptid).c_str (), |
3d6e9d23 | 776 | objfile_name (objfile), ex.what ()); |
9e35dae4 DJ |
777 | else |
778 | error (_("Cannot find thread-local storage for %s, " | |
779 | "executable file %s:\n%s"), | |
a068643d | 780 | target_pid_to_str (ptid).c_str (), |
3d6e9d23 | 781 | objfile_name (objfile), ex.what ()); |
9e35dae4 DJ |
782 | break; |
783 | default: | |
eedc3f4f | 784 | throw; |
9e35dae4 DJ |
785 | break; |
786 | } | |
787 | } | |
788 | } | |
9e35dae4 DJ |
789 | else |
790 | error (_("Cannot find thread-local variables on this target")); | |
791 | ||
792 | return addr; | |
793 | } | |
794 | ||
6be7b56e | 795 | const char * |
01cb8804 | 796 | target_xfer_status_to_string (enum target_xfer_status status) |
6be7b56e PA |
797 | { |
798 | #define CASE(X) case X: return #X | |
01cb8804 | 799 | switch (status) |
6be7b56e PA |
800 | { |
801 | CASE(TARGET_XFER_E_IO); | |
bc113b4e | 802 | CASE(TARGET_XFER_UNAVAILABLE); |
6be7b56e PA |
803 | default: |
804 | return "<unknown>"; | |
805 | } | |
806 | #undef CASE | |
807 | }; | |
808 | ||
809 | ||
c906108c SS |
810 | #undef MIN |
811 | #define MIN(A, B) (((A) <= (B)) ? (A) : (B)) | |
812 | ||
813 | /* target_read_string -- read a null terminated string, up to LEN bytes, | |
814 | from MEMADDR in target. Set *ERRNOP to the errno code, or 0 if successful. | |
815 | Set *STRING to a pointer to malloc'd memory containing the data; the caller | |
816 | is responsible for freeing it. Return the number of bytes successfully | |
817 | read. */ | |
818 | ||
819 | int | |
e83e4e24 TT |
820 | target_read_string (CORE_ADDR memaddr, gdb::unique_xmalloc_ptr<char> *string, |
821 | int len, int *errnop) | |
c906108c | 822 | { |
c2e8b827 | 823 | int tlen, offset, i; |
1b0ba102 | 824 | gdb_byte buf[4]; |
c906108c SS |
825 | int errcode = 0; |
826 | char *buffer; | |
827 | int buffer_allocated; | |
828 | char *bufptr; | |
829 | unsigned int nbytes_read = 0; | |
830 | ||
6217bf3e MS |
831 | gdb_assert (string); |
832 | ||
c906108c SS |
833 | /* Small for testing. */ |
834 | buffer_allocated = 4; | |
224c3ddb | 835 | buffer = (char *) xmalloc (buffer_allocated); |
c906108c SS |
836 | bufptr = buffer; |
837 | ||
c906108c SS |
838 | while (len > 0) |
839 | { | |
840 | tlen = MIN (len, 4 - (memaddr & 3)); | |
841 | offset = memaddr & 3; | |
842 | ||
1b0ba102 | 843 | errcode = target_read_memory (memaddr & ~3, buf, sizeof buf); |
c906108c SS |
844 | if (errcode != 0) |
845 | { | |
846 | /* The transfer request might have crossed the boundary to an | |
c378eb4e | 847 | unallocated region of memory. Retry the transfer, requesting |
c906108c SS |
848 | a single byte. */ |
849 | tlen = 1; | |
850 | offset = 0; | |
b8eb5af0 | 851 | errcode = target_read_memory (memaddr, buf, 1); |
c906108c SS |
852 | if (errcode != 0) |
853 | goto done; | |
854 | } | |
855 | ||
856 | if (bufptr - buffer + tlen > buffer_allocated) | |
857 | { | |
858 | unsigned int bytes; | |
5d502164 | 859 | |
c906108c SS |
860 | bytes = bufptr - buffer; |
861 | buffer_allocated *= 2; | |
224c3ddb | 862 | buffer = (char *) xrealloc (buffer, buffer_allocated); |
c906108c SS |
863 | bufptr = buffer + bytes; |
864 | } | |
865 | ||
866 | for (i = 0; i < tlen; i++) | |
867 | { | |
868 | *bufptr++ = buf[i + offset]; | |
869 | if (buf[i + offset] == '\000') | |
870 | { | |
871 | nbytes_read += i + 1; | |
872 | goto done; | |
873 | } | |
874 | } | |
875 | ||
876 | memaddr += tlen; | |
877 | len -= tlen; | |
878 | nbytes_read += tlen; | |
879 | } | |
c5aa993b | 880 | done: |
e83e4e24 | 881 | string->reset (buffer); |
c906108c SS |
882 | if (errnop != NULL) |
883 | *errnop = errcode; | |
c906108c SS |
884 | return nbytes_read; |
885 | } | |
886 | ||
07b82ea5 PA |
887 | struct target_section_table * |
888 | target_get_section_table (struct target_ops *target) | |
889 | { | |
f6ac5f3d | 890 | return target->get_section_table (); |
07b82ea5 PA |
891 | } |
892 | ||
8db32d44 | 893 | /* Find a section containing ADDR. */ |
07b82ea5 | 894 | |
0542c86d | 895 | struct target_section * |
8db32d44 AC |
896 | target_section_by_addr (struct target_ops *target, CORE_ADDR addr) |
897 | { | |
07b82ea5 | 898 | struct target_section_table *table = target_get_section_table (target); |
0542c86d | 899 | struct target_section *secp; |
07b82ea5 PA |
900 | |
901 | if (table == NULL) | |
902 | return NULL; | |
903 | ||
904 | for (secp = table->sections; secp < table->sections_end; secp++) | |
8db32d44 AC |
905 | { |
906 | if (addr >= secp->addr && addr < secp->endaddr) | |
907 | return secp; | |
908 | } | |
909 | return NULL; | |
910 | } | |
911 | ||
0fec99e8 PA |
912 | |
913 | /* Helper for the memory xfer routines. Checks the attributes of the | |
914 | memory region of MEMADDR against the read or write being attempted. | |
915 | If the access is permitted returns true, otherwise returns false. | |
916 | REGION_P is an optional output parameter. If not-NULL, it is | |
917 | filled with a pointer to the memory region of MEMADDR. REG_LEN | |
918 | returns LEN trimmed to the end of the region. This is how much the | |
919 | caller can continue requesting, if the access is permitted. A | |
920 | single xfer request must not straddle memory region boundaries. */ | |
921 | ||
922 | static int | |
923 | memory_xfer_check_region (gdb_byte *readbuf, const gdb_byte *writebuf, | |
924 | ULONGEST memaddr, ULONGEST len, ULONGEST *reg_len, | |
925 | struct mem_region **region_p) | |
926 | { | |
927 | struct mem_region *region; | |
928 | ||
929 | region = lookup_mem_region (memaddr); | |
930 | ||
931 | if (region_p != NULL) | |
932 | *region_p = region; | |
933 | ||
934 | switch (region->attrib.mode) | |
935 | { | |
936 | case MEM_RO: | |
937 | if (writebuf != NULL) | |
938 | return 0; | |
939 | break; | |
940 | ||
941 | case MEM_WO: | |
942 | if (readbuf != NULL) | |
943 | return 0; | |
944 | break; | |
945 | ||
946 | case MEM_FLASH: | |
947 | /* We only support writing to flash during "load" for now. */ | |
948 | if (writebuf != NULL) | |
949 | error (_("Writing to flash memory forbidden in this context")); | |
950 | break; | |
951 | ||
952 | case MEM_NONE: | |
953 | return 0; | |
954 | } | |
955 | ||
956 | /* region->hi == 0 means there's no upper bound. */ | |
957 | if (memaddr + len < region->hi || region->hi == 0) | |
958 | *reg_len = len; | |
959 | else | |
960 | *reg_len = region->hi - memaddr; | |
961 | ||
962 | return 1; | |
963 | } | |
964 | ||
9f713294 YQ |
965 | /* Read memory from more than one valid target. A core file, for |
966 | instance, could have some of memory but delegate other bits to | |
967 | the target below it. So, we must manually try all targets. */ | |
968 | ||
cc9f16aa | 969 | enum target_xfer_status |
17fde6d0 | 970 | raw_memory_xfer_partial (struct target_ops *ops, gdb_byte *readbuf, |
9b409511 YQ |
971 | const gdb_byte *writebuf, ULONGEST memaddr, LONGEST len, |
972 | ULONGEST *xfered_len) | |
9f713294 | 973 | { |
9b409511 | 974 | enum target_xfer_status res; |
9f713294 YQ |
975 | |
976 | do | |
977 | { | |
f6ac5f3d PA |
978 | res = ops->xfer_partial (TARGET_OBJECT_MEMORY, NULL, |
979 | readbuf, writebuf, memaddr, len, | |
980 | xfered_len); | |
9b409511 | 981 | if (res == TARGET_XFER_OK) |
9f713294 YQ |
982 | break; |
983 | ||
633785ff | 984 | /* Stop if the target reports that the memory is not available. */ |
bc113b4e | 985 | if (res == TARGET_XFER_UNAVAILABLE) |
633785ff MM |
986 | break; |
987 | ||
9f713294 YQ |
988 | /* We want to continue past core files to executables, but not |
989 | past a running target's memory. */ | |
f6ac5f3d | 990 | if (ops->has_all_memory ()) |
9f713294 YQ |
991 | break; |
992 | ||
b6a8c27b | 993 | ops = ops->beneath (); |
9f713294 YQ |
994 | } |
995 | while (ops != NULL); | |
996 | ||
0f26cec1 PA |
997 | /* The cache works at the raw memory level. Make sure the cache |
998 | gets updated with raw contents no matter what kind of memory | |
999 | object was originally being written. Note we do write-through | |
1000 | first, so that if it fails, we don't write to the cache contents | |
1001 | that never made it to the target. */ | |
1002 | if (writebuf != NULL | |
d7e15655 | 1003 | && inferior_ptid != null_ptid |
0f26cec1 PA |
1004 | && target_dcache_init_p () |
1005 | && (stack_cache_enabled_p () || code_cache_enabled_p ())) | |
1006 | { | |
1007 | DCACHE *dcache = target_dcache_get (); | |
1008 | ||
1009 | /* Note that writing to an area of memory which wasn't present | |
1010 | in the cache doesn't cause it to be loaded in. */ | |
1011 | dcache_update (dcache, res, memaddr, writebuf, *xfered_len); | |
1012 | } | |
1013 | ||
9f713294 YQ |
1014 | return res; |
1015 | } | |
1016 | ||
7f79c47e DE |
1017 | /* Perform a partial memory transfer. |
1018 | For docs see target.h, to_xfer_partial. */ | |
cf7a04e8 | 1019 | |
9b409511 | 1020 | static enum target_xfer_status |
f0ba3972 | 1021 | memory_xfer_partial_1 (struct target_ops *ops, enum target_object object, |
17fde6d0 | 1022 | gdb_byte *readbuf, const gdb_byte *writebuf, ULONGEST memaddr, |
9b409511 | 1023 | ULONGEST len, ULONGEST *xfered_len) |
0779438d | 1024 | { |
9b409511 | 1025 | enum target_xfer_status res; |
0fec99e8 | 1026 | ULONGEST reg_len; |
cf7a04e8 | 1027 | struct mem_region *region; |
4e5d721f | 1028 | struct inferior *inf; |
cf7a04e8 | 1029 | |
07b82ea5 PA |
1030 | /* For accesses to unmapped overlay sections, read directly from |
1031 | files. Must do this first, as MEMADDR may need adjustment. */ | |
1032 | if (readbuf != NULL && overlay_debugging) | |
1033 | { | |
1034 | struct obj_section *section = find_pc_overlay (memaddr); | |
5d502164 | 1035 | |
07b82ea5 PA |
1036 | if (pc_in_unmapped_range (memaddr, section)) |
1037 | { | |
1038 | struct target_section_table *table | |
1039 | = target_get_section_table (ops); | |
1040 | const char *section_name = section->the_bfd_section->name; | |
5d502164 | 1041 | |
07b82ea5 PA |
1042 | memaddr = overlay_mapped_address (memaddr, section); |
1043 | return section_table_xfer_memory_partial (readbuf, writebuf, | |
9b409511 | 1044 | memaddr, len, xfered_len, |
07b82ea5 PA |
1045 | table->sections, |
1046 | table->sections_end, | |
1047 | section_name); | |
1048 | } | |
1049 | } | |
1050 | ||
1051 | /* Try the executable files, if "trust-readonly-sections" is set. */ | |
cf7a04e8 DJ |
1052 | if (readbuf != NULL && trust_readonly) |
1053 | { | |
0542c86d | 1054 | struct target_section *secp; |
07b82ea5 | 1055 | struct target_section_table *table; |
cf7a04e8 DJ |
1056 | |
1057 | secp = target_section_by_addr (ops, memaddr); | |
1058 | if (secp != NULL | |
fd361982 | 1059 | && (bfd_section_flags (secp->the_bfd_section) & SEC_READONLY)) |
07b82ea5 PA |
1060 | { |
1061 | table = target_get_section_table (ops); | |
1062 | return section_table_xfer_memory_partial (readbuf, writebuf, | |
9b409511 | 1063 | memaddr, len, xfered_len, |
07b82ea5 PA |
1064 | table->sections, |
1065 | table->sections_end, | |
1066 | NULL); | |
1067 | } | |
98646950 UW |
1068 | } |
1069 | ||
cf7a04e8 | 1070 | /* Try GDB's internal data cache. */ |
cf7a04e8 | 1071 | |
0fec99e8 PA |
1072 | if (!memory_xfer_check_region (readbuf, writebuf, memaddr, len, ®_len, |
1073 | ®ion)) | |
1074 | return TARGET_XFER_E_IO; | |
cf7a04e8 | 1075 | |
d7e15655 | 1076 | if (inferior_ptid != null_ptid) |
00431a78 | 1077 | inf = current_inferior (); |
6c95b8df PA |
1078 | else |
1079 | inf = NULL; | |
4e5d721f DE |
1080 | |
1081 | if (inf != NULL | |
0f26cec1 | 1082 | && readbuf != NULL |
2f4d8875 PA |
1083 | /* The dcache reads whole cache lines; that doesn't play well |
1084 | with reading from a trace buffer, because reading outside of | |
1085 | the collected memory range fails. */ | |
1086 | && get_traceframe_number () == -1 | |
4e5d721f | 1087 | && (region->attrib.cache |
29453a14 YQ |
1088 | || (stack_cache_enabled_p () && object == TARGET_OBJECT_STACK_MEMORY) |
1089 | || (code_cache_enabled_p () && object == TARGET_OBJECT_CODE_MEMORY))) | |
cf7a04e8 | 1090 | { |
2a2f9fe4 YQ |
1091 | DCACHE *dcache = target_dcache_get_or_init (); |
1092 | ||
0f26cec1 PA |
1093 | return dcache_read_memory_partial (ops, dcache, memaddr, readbuf, |
1094 | reg_len, xfered_len); | |
cf7a04e8 DJ |
1095 | } |
1096 | ||
1097 | /* If none of those methods found the memory we wanted, fall back | |
1098 | to a target partial transfer. Normally a single call to | |
1099 | to_xfer_partial is enough; if it doesn't recognize an object | |
1100 | it will call the to_xfer_partial of the next target down. | |
1101 | But for memory this won't do. Memory is the only target | |
9b409511 YQ |
1102 | object which can be read from more than one valid target. |
1103 | A core file, for instance, could have some of memory but | |
1104 | delegate other bits to the target below it. So, we must | |
1105 | manually try all targets. */ | |
1106 | ||
1107 | res = raw_memory_xfer_partial (ops, readbuf, writebuf, memaddr, reg_len, | |
1108 | xfered_len); | |
cf7a04e8 DJ |
1109 | |
1110 | /* If we still haven't got anything, return the last error. We | |
1111 | give up. */ | |
1112 | return res; | |
0779438d AC |
1113 | } |
1114 | ||
f0ba3972 PA |
1115 | /* Perform a partial memory transfer. For docs see target.h, |
1116 | to_xfer_partial. */ | |
1117 | ||
9b409511 | 1118 | static enum target_xfer_status |
f0ba3972 | 1119 | memory_xfer_partial (struct target_ops *ops, enum target_object object, |
9b409511 YQ |
1120 | gdb_byte *readbuf, const gdb_byte *writebuf, |
1121 | ULONGEST memaddr, ULONGEST len, ULONGEST *xfered_len) | |
f0ba3972 | 1122 | { |
9b409511 | 1123 | enum target_xfer_status res; |
f0ba3972 PA |
1124 | |
1125 | /* Zero length requests are ok and require no work. */ | |
1126 | if (len == 0) | |
9b409511 | 1127 | return TARGET_XFER_EOF; |
f0ba3972 | 1128 | |
a738ea1d YQ |
1129 | memaddr = address_significant (target_gdbarch (), memaddr); |
1130 | ||
f0ba3972 PA |
1131 | /* Fill in READBUF with breakpoint shadows, or WRITEBUF with |
1132 | breakpoint insns, thus hiding out from higher layers whether | |
1133 | there are software breakpoints inserted in the code stream. */ | |
1134 | if (readbuf != NULL) | |
1135 | { | |
9b409511 YQ |
1136 | res = memory_xfer_partial_1 (ops, object, readbuf, NULL, memaddr, len, |
1137 | xfered_len); | |
f0ba3972 | 1138 | |
9b409511 | 1139 | if (res == TARGET_XFER_OK && !show_memory_breakpoints) |
c63528fc | 1140 | breakpoint_xfer_memory (readbuf, NULL, NULL, memaddr, *xfered_len); |
f0ba3972 PA |
1141 | } |
1142 | else | |
1143 | { | |
67c059c2 AB |
1144 | /* A large write request is likely to be partially satisfied |
1145 | by memory_xfer_partial_1. We will continually malloc | |
1146 | and free a copy of the entire write request for breakpoint | |
1147 | shadow handling even though we only end up writing a small | |
09c98b44 DB |
1148 | subset of it. Cap writes to a limit specified by the target |
1149 | to mitigate this. */ | |
f6ac5f3d | 1150 | len = std::min (ops->get_memory_xfer_limit (), len); |
67c059c2 | 1151 | |
26fcd5d7 TT |
1152 | gdb::byte_vector buf (writebuf, writebuf + len); |
1153 | breakpoint_xfer_memory (NULL, buf.data (), writebuf, memaddr, len); | |
1154 | res = memory_xfer_partial_1 (ops, object, NULL, buf.data (), memaddr, len, | |
9b409511 | 1155 | xfered_len); |
f0ba3972 PA |
1156 | } |
1157 | ||
1158 | return res; | |
1159 | } | |
1160 | ||
cb85b21b TT |
1161 | scoped_restore_tmpl<int> |
1162 | make_scoped_restore_show_memory_breakpoints (int show) | |
8defab1a | 1163 | { |
cb85b21b | 1164 | return make_scoped_restore (&show_memory_breakpoints, show); |
8defab1a DJ |
1165 | } |
1166 | ||
7f79c47e DE |
1167 | /* For docs see target.h, to_xfer_partial. */ |
1168 | ||
9b409511 | 1169 | enum target_xfer_status |
27394598 AC |
1170 | target_xfer_partial (struct target_ops *ops, |
1171 | enum target_object object, const char *annex, | |
4ac248ca | 1172 | gdb_byte *readbuf, const gdb_byte *writebuf, |
9b409511 YQ |
1173 | ULONGEST offset, ULONGEST len, |
1174 | ULONGEST *xfered_len) | |
27394598 | 1175 | { |
9b409511 | 1176 | enum target_xfer_status retval; |
27394598 | 1177 | |
ce6d0892 YQ |
1178 | /* Transfer is done when LEN is zero. */ |
1179 | if (len == 0) | |
9b409511 | 1180 | return TARGET_XFER_EOF; |
ce6d0892 | 1181 | |
d914c394 SS |
1182 | if (writebuf && !may_write_memory) |
1183 | error (_("Writing to memory is not allowed (addr %s, len %s)"), | |
1184 | core_addr_to_string_nz (offset), plongest (len)); | |
1185 | ||
9b409511 YQ |
1186 | *xfered_len = 0; |
1187 | ||
cf7a04e8 DJ |
1188 | /* If this is a memory transfer, let the memory-specific code |
1189 | have a look at it instead. Memory transfers are more | |
1190 | complicated. */ | |
29453a14 YQ |
1191 | if (object == TARGET_OBJECT_MEMORY || object == TARGET_OBJECT_STACK_MEMORY |
1192 | || object == TARGET_OBJECT_CODE_MEMORY) | |
4e5d721f | 1193 | retval = memory_xfer_partial (ops, object, readbuf, |
9b409511 | 1194 | writebuf, offset, len, xfered_len); |
9f713294 | 1195 | else if (object == TARGET_OBJECT_RAW_MEMORY) |
cf7a04e8 | 1196 | { |
0fec99e8 PA |
1197 | /* Skip/avoid accessing the target if the memory region |
1198 | attributes block the access. Check this here instead of in | |
1199 | raw_memory_xfer_partial as otherwise we'd end up checking | |
1200 | this twice in the case of the memory_xfer_partial path is | |
1201 | taken; once before checking the dcache, and another in the | |
1202 | tail call to raw_memory_xfer_partial. */ | |
1203 | if (!memory_xfer_check_region (readbuf, writebuf, offset, len, &len, | |
1204 | NULL)) | |
1205 | return TARGET_XFER_E_IO; | |
1206 | ||
9f713294 | 1207 | /* Request the normal memory object from other layers. */ |
9b409511 YQ |
1208 | retval = raw_memory_xfer_partial (ops, readbuf, writebuf, offset, len, |
1209 | xfered_len); | |
cf7a04e8 | 1210 | } |
9f713294 | 1211 | else |
f6ac5f3d PA |
1212 | retval = ops->xfer_partial (object, annex, readbuf, |
1213 | writebuf, offset, len, xfered_len); | |
cf7a04e8 | 1214 | |
27394598 AC |
1215 | if (targetdebug) |
1216 | { | |
1217 | const unsigned char *myaddr = NULL; | |
1218 | ||
1219 | fprintf_unfiltered (gdb_stdlog, | |
3e43a32a | 1220 | "%s:target_xfer_partial " |
9b409511 | 1221 | "(%d, %s, %s, %s, %s, %s) = %d, %s", |
f6ac5f3d | 1222 | ops->shortname (), |
27394598 AC |
1223 | (int) object, |
1224 | (annex ? annex : "(null)"), | |
53b71562 JB |
1225 | host_address_to_string (readbuf), |
1226 | host_address_to_string (writebuf), | |
0b1553bc | 1227 | core_addr_to_string_nz (offset), |
9b409511 YQ |
1228 | pulongest (len), retval, |
1229 | pulongest (*xfered_len)); | |
27394598 AC |
1230 | |
1231 | if (readbuf) | |
1232 | myaddr = readbuf; | |
1233 | if (writebuf) | |
1234 | myaddr = writebuf; | |
9b409511 | 1235 | if (retval == TARGET_XFER_OK && myaddr != NULL) |
27394598 AC |
1236 | { |
1237 | int i; | |
2bc416ba | 1238 | |
27394598 | 1239 | fputs_unfiltered (", bytes =", gdb_stdlog); |
9b409511 | 1240 | for (i = 0; i < *xfered_len; i++) |
27394598 | 1241 | { |
53b71562 | 1242 | if ((((intptr_t) &(myaddr[i])) & 0xf) == 0) |
27394598 AC |
1243 | { |
1244 | if (targetdebug < 2 && i > 0) | |
1245 | { | |
1246 | fprintf_unfiltered (gdb_stdlog, " ..."); | |
1247 | break; | |
1248 | } | |
1249 | fprintf_unfiltered (gdb_stdlog, "\n"); | |
1250 | } | |
2bc416ba | 1251 | |
27394598 AC |
1252 | fprintf_unfiltered (gdb_stdlog, " %02x", myaddr[i] & 0xff); |
1253 | } | |
1254 | } | |
2bc416ba | 1255 | |
27394598 AC |
1256 | fputc_unfiltered ('\n', gdb_stdlog); |
1257 | } | |
9b409511 YQ |
1258 | |
1259 | /* Check implementations of to_xfer_partial update *XFERED_LEN | |
1260 | properly. Do assertion after printing debug messages, so that we | |
1261 | can find more clues on assertion failure from debugging messages. */ | |
bc113b4e | 1262 | if (retval == TARGET_XFER_OK || retval == TARGET_XFER_UNAVAILABLE) |
9b409511 YQ |
1263 | gdb_assert (*xfered_len > 0); |
1264 | ||
27394598 AC |
1265 | return retval; |
1266 | } | |
1267 | ||
578d3588 PA |
1268 | /* Read LEN bytes of target memory at address MEMADDR, placing the |
1269 | results in GDB's memory at MYADDR. Returns either 0 for success or | |
d09f2c3f | 1270 | -1 if any error occurs. |
c906108c SS |
1271 | |
1272 | If an error occurs, no guarantee is made about the contents of the data at | |
1273 | MYADDR. In particular, the caller should not depend upon partial reads | |
1274 | filling the buffer with good data. There is no way for the caller to know | |
1275 | how much good data might have been transfered anyway. Callers that can | |
cf7a04e8 | 1276 | deal with partial reads should call target_read (which will retry until |
c378eb4e | 1277 | it makes no progress, and then return how much was transferred). */ |
c906108c SS |
1278 | |
1279 | int | |
1b162304 | 1280 | target_read_memory (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len) |
c906108c | 1281 | { |
8b88a78e | 1282 | if (target_read (current_top_target (), TARGET_OBJECT_MEMORY, NULL, |
cf7a04e8 DJ |
1283 | myaddr, memaddr, len) == len) |
1284 | return 0; | |
0779438d | 1285 | else |
d09f2c3f | 1286 | return -1; |
c906108c SS |
1287 | } |
1288 | ||
721ec300 GB |
1289 | /* See target/target.h. */ |
1290 | ||
1291 | int | |
1292 | target_read_uint32 (CORE_ADDR memaddr, uint32_t *result) | |
1293 | { | |
1294 | gdb_byte buf[4]; | |
1295 | int r; | |
1296 | ||
1297 | r = target_read_memory (memaddr, buf, sizeof buf); | |
1298 | if (r != 0) | |
1299 | return r; | |
1300 | *result = extract_unsigned_integer (buf, sizeof buf, | |
1301 | gdbarch_byte_order (target_gdbarch ())); | |
1302 | return 0; | |
1303 | } | |
1304 | ||
aee4bf85 PA |
1305 | /* Like target_read_memory, but specify explicitly that this is a read |
1306 | from the target's raw memory. That is, this read bypasses the | |
1307 | dcache, breakpoint shadowing, etc. */ | |
1308 | ||
1309 | int | |
1310 | target_read_raw_memory (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len) | |
1311 | { | |
8b88a78e | 1312 | if (target_read (current_top_target (), TARGET_OBJECT_RAW_MEMORY, NULL, |
aee4bf85 PA |
1313 | myaddr, memaddr, len) == len) |
1314 | return 0; | |
1315 | else | |
d09f2c3f | 1316 | return -1; |
aee4bf85 PA |
1317 | } |
1318 | ||
4e5d721f DE |
1319 | /* Like target_read_memory, but specify explicitly that this is a read from |
1320 | the target's stack. This may trigger different cache behavior. */ | |
1321 | ||
1322 | int | |
45aa4659 | 1323 | target_read_stack (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len) |
4e5d721f | 1324 | { |
8b88a78e | 1325 | if (target_read (current_top_target (), TARGET_OBJECT_STACK_MEMORY, NULL, |
4e5d721f DE |
1326 | myaddr, memaddr, len) == len) |
1327 | return 0; | |
1328 | else | |
d09f2c3f | 1329 | return -1; |
4e5d721f DE |
1330 | } |
1331 | ||
29453a14 YQ |
1332 | /* Like target_read_memory, but specify explicitly that this is a read from |
1333 | the target's code. This may trigger different cache behavior. */ | |
1334 | ||
1335 | int | |
1336 | target_read_code (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len) | |
1337 | { | |
8b88a78e | 1338 | if (target_read (current_top_target (), TARGET_OBJECT_CODE_MEMORY, NULL, |
29453a14 YQ |
1339 | myaddr, memaddr, len) == len) |
1340 | return 0; | |
1341 | else | |
d09f2c3f | 1342 | return -1; |
29453a14 YQ |
1343 | } |
1344 | ||
7f79c47e | 1345 | /* Write LEN bytes from MYADDR to target memory at address MEMADDR. |
d09f2c3f PA |
1346 | Returns either 0 for success or -1 if any error occurs. If an |
1347 | error occurs, no guarantee is made about how much data got written. | |
1348 | Callers that can deal with partial writes should call | |
1349 | target_write. */ | |
7f79c47e | 1350 | |
c906108c | 1351 | int |
45aa4659 | 1352 | target_write_memory (CORE_ADDR memaddr, const gdb_byte *myaddr, ssize_t len) |
c906108c | 1353 | { |
8b88a78e | 1354 | if (target_write (current_top_target (), TARGET_OBJECT_MEMORY, NULL, |
cf7a04e8 DJ |
1355 | myaddr, memaddr, len) == len) |
1356 | return 0; | |
0779438d | 1357 | else |
d09f2c3f | 1358 | return -1; |
c906108c | 1359 | } |
c5aa993b | 1360 | |
f0ba3972 | 1361 | /* Write LEN bytes from MYADDR to target raw memory at address |
d09f2c3f PA |
1362 | MEMADDR. Returns either 0 for success or -1 if any error occurs. |
1363 | If an error occurs, no guarantee is made about how much data got | |
1364 | written. Callers that can deal with partial writes should call | |
1365 | target_write. */ | |
f0ba3972 PA |
1366 | |
1367 | int | |
45aa4659 | 1368 | target_write_raw_memory (CORE_ADDR memaddr, const gdb_byte *myaddr, ssize_t len) |
f0ba3972 | 1369 | { |
8b88a78e | 1370 | if (target_write (current_top_target (), TARGET_OBJECT_RAW_MEMORY, NULL, |
f0ba3972 PA |
1371 | myaddr, memaddr, len) == len) |
1372 | return 0; | |
1373 | else | |
d09f2c3f | 1374 | return -1; |
f0ba3972 PA |
1375 | } |
1376 | ||
fd79ecee DJ |
1377 | /* Fetch the target's memory map. */ |
1378 | ||
a664f67e | 1379 | std::vector<mem_region> |
fd79ecee DJ |
1380 | target_memory_map (void) |
1381 | { | |
8b88a78e | 1382 | std::vector<mem_region> result = current_top_target ()->memory_map (); |
a664f67e SM |
1383 | if (result.empty ()) |
1384 | return result; | |
fd79ecee | 1385 | |
a664f67e | 1386 | std::sort (result.begin (), result.end ()); |
fd79ecee DJ |
1387 | |
1388 | /* Check that regions do not overlap. Simultaneously assign | |
1389 | a numbering for the "mem" commands to use to refer to | |
1390 | each region. */ | |
a664f67e SM |
1391 | mem_region *last_one = NULL; |
1392 | for (size_t ix = 0; ix < result.size (); ix++) | |
fd79ecee | 1393 | { |
a664f67e | 1394 | mem_region *this_one = &result[ix]; |
fd79ecee DJ |
1395 | this_one->number = ix; |
1396 | ||
a664f67e | 1397 | if (last_one != NULL && last_one->hi > this_one->lo) |
fd79ecee DJ |
1398 | { |
1399 | warning (_("Overlapping regions in memory map: ignoring")); | |
a664f67e | 1400 | return std::vector<mem_region> (); |
fd79ecee | 1401 | } |
a664f67e | 1402 | |
fd79ecee DJ |
1403 | last_one = this_one; |
1404 | } | |
1405 | ||
1406 | return result; | |
1407 | } | |
1408 | ||
a76d924d DJ |
1409 | void |
1410 | target_flash_erase (ULONGEST address, LONGEST length) | |
1411 | { | |
8b88a78e | 1412 | current_top_target ()->flash_erase (address, length); |
a76d924d DJ |
1413 | } |
1414 | ||
1415 | void | |
1416 | target_flash_done (void) | |
1417 | { | |
8b88a78e | 1418 | current_top_target ()->flash_done (); |
a76d924d DJ |
1419 | } |
1420 | ||
920d2a44 AC |
1421 | static void |
1422 | show_trust_readonly (struct ui_file *file, int from_tty, | |
1423 | struct cmd_list_element *c, const char *value) | |
1424 | { | |
3e43a32a MS |
1425 | fprintf_filtered (file, |
1426 | _("Mode for reading from readonly sections is %s.\n"), | |
920d2a44 AC |
1427 | value); |
1428 | } | |
3a11626d | 1429 | |
7f79c47e | 1430 | /* Target vector read/write partial wrapper functions. */ |
0088c768 | 1431 | |
9b409511 | 1432 | static enum target_xfer_status |
1e3ff5ad AC |
1433 | target_read_partial (struct target_ops *ops, |
1434 | enum target_object object, | |
1b0ba102 | 1435 | const char *annex, gdb_byte *buf, |
9b409511 YQ |
1436 | ULONGEST offset, ULONGEST len, |
1437 | ULONGEST *xfered_len) | |
1e3ff5ad | 1438 | { |
9b409511 YQ |
1439 | return target_xfer_partial (ops, object, annex, buf, NULL, offset, len, |
1440 | xfered_len); | |
1e3ff5ad AC |
1441 | } |
1442 | ||
8a55ffb0 | 1443 | static enum target_xfer_status |
1e3ff5ad AC |
1444 | target_write_partial (struct target_ops *ops, |
1445 | enum target_object object, | |
1b0ba102 | 1446 | const char *annex, const gdb_byte *buf, |
9b409511 | 1447 | ULONGEST offset, LONGEST len, ULONGEST *xfered_len) |
1e3ff5ad | 1448 | { |
9b409511 YQ |
1449 | return target_xfer_partial (ops, object, annex, NULL, buf, offset, len, |
1450 | xfered_len); | |
1e3ff5ad AC |
1451 | } |
1452 | ||
1453 | /* Wrappers to perform the full transfer. */ | |
7f79c47e DE |
1454 | |
1455 | /* For docs on target_read see target.h. */ | |
1456 | ||
1e3ff5ad AC |
1457 | LONGEST |
1458 | target_read (struct target_ops *ops, | |
1459 | enum target_object object, | |
1b0ba102 | 1460 | const char *annex, gdb_byte *buf, |
1e3ff5ad AC |
1461 | ULONGEST offset, LONGEST len) |
1462 | { | |
279a6fed | 1463 | LONGEST xfered_total = 0; |
d309493c SM |
1464 | int unit_size = 1; |
1465 | ||
1466 | /* If we are reading from a memory object, find the length of an addressable | |
1467 | unit for that architecture. */ | |
1468 | if (object == TARGET_OBJECT_MEMORY | |
1469 | || object == TARGET_OBJECT_STACK_MEMORY | |
1470 | || object == TARGET_OBJECT_CODE_MEMORY | |
1471 | || object == TARGET_OBJECT_RAW_MEMORY) | |
1472 | unit_size = gdbarch_addressable_memory_unit_size (target_gdbarch ()); | |
5d502164 | 1473 | |
279a6fed | 1474 | while (xfered_total < len) |
1e3ff5ad | 1475 | { |
279a6fed | 1476 | ULONGEST xfered_partial; |
9b409511 YQ |
1477 | enum target_xfer_status status; |
1478 | ||
1479 | status = target_read_partial (ops, object, annex, | |
d309493c | 1480 | buf + xfered_total * unit_size, |
279a6fed SM |
1481 | offset + xfered_total, len - xfered_total, |
1482 | &xfered_partial); | |
5d502164 | 1483 | |
1e3ff5ad | 1484 | /* Call an observer, notifying them of the xfer progress? */ |
9b409511 | 1485 | if (status == TARGET_XFER_EOF) |
279a6fed | 1486 | return xfered_total; |
9b409511 YQ |
1487 | else if (status == TARGET_XFER_OK) |
1488 | { | |
279a6fed | 1489 | xfered_total += xfered_partial; |
9b409511 YQ |
1490 | QUIT; |
1491 | } | |
1492 | else | |
279a6fed | 1493 | return TARGET_XFER_E_IO; |
9b409511 | 1494 | |
1e3ff5ad AC |
1495 | } |
1496 | return len; | |
1497 | } | |
1498 | ||
f1a507a1 JB |
1499 | /* Assuming that the entire [begin, end) range of memory cannot be |
1500 | read, try to read whatever subrange is possible to read. | |
1501 | ||
1502 | The function returns, in RESULT, either zero or one memory block. | |
1503 | If there's a readable subrange at the beginning, it is completely | |
1504 | read and returned. Any further readable subrange will not be read. | |
1505 | Otherwise, if there's a readable subrange at the end, it will be | |
1506 | completely read and returned. Any readable subranges before it | |
1507 | (obviously, not starting at the beginning), will be ignored. In | |
1508 | other cases -- either no readable subrange, or readable subrange(s) | |
1509 | that is neither at the beginning, or end, nothing is returned. | |
1510 | ||
1511 | The purpose of this function is to handle a read across a boundary | |
1512 | of accessible memory in a case when memory map is not available. | |
1513 | The above restrictions are fine for this case, but will give | |
1514 | incorrect results if the memory is 'patchy'. However, supporting | |
1515 | 'patchy' memory would require trying to read every single byte, | |
1516 | and it seems unacceptable solution. Explicit memory map is | |
1517 | recommended for this case -- and target_read_memory_robust will | |
1518 | take care of reading multiple ranges then. */ | |
8dedea02 VP |
1519 | |
1520 | static void | |
3e43a32a | 1521 | read_whatever_is_readable (struct target_ops *ops, |
279a6fed | 1522 | const ULONGEST begin, const ULONGEST end, |
d309493c | 1523 | int unit_size, |
386c8614 | 1524 | std::vector<memory_read_result> *result) |
d5086790 | 1525 | { |
8dedea02 VP |
1526 | ULONGEST current_begin = begin; |
1527 | ULONGEST current_end = end; | |
1528 | int forward; | |
9b409511 | 1529 | ULONGEST xfered_len; |
8dedea02 VP |
1530 | |
1531 | /* If we previously failed to read 1 byte, nothing can be done here. */ | |
1532 | if (end - begin <= 1) | |
386c8614 TT |
1533 | return; |
1534 | ||
1535 | gdb::unique_xmalloc_ptr<gdb_byte> buf ((gdb_byte *) xmalloc (end - begin)); | |
8dedea02 VP |
1536 | |
1537 | /* Check that either first or the last byte is readable, and give up | |
c378eb4e | 1538 | if not. This heuristic is meant to permit reading accessible memory |
8dedea02 VP |
1539 | at the boundary of accessible region. */ |
1540 | if (target_read_partial (ops, TARGET_OBJECT_MEMORY, NULL, | |
386c8614 | 1541 | buf.get (), begin, 1, &xfered_len) == TARGET_XFER_OK) |
8dedea02 VP |
1542 | { |
1543 | forward = 1; | |
1544 | ++current_begin; | |
1545 | } | |
1546 | else if (target_read_partial (ops, TARGET_OBJECT_MEMORY, NULL, | |
386c8614 | 1547 | buf.get () + (end - begin) - 1, end - 1, 1, |
9b409511 | 1548 | &xfered_len) == TARGET_XFER_OK) |
8dedea02 VP |
1549 | { |
1550 | forward = 0; | |
1551 | --current_end; | |
1552 | } | |
1553 | else | |
386c8614 | 1554 | return; |
8dedea02 VP |
1555 | |
1556 | /* Loop invariant is that the [current_begin, current_end) was previously | |
1557 | found to be not readable as a whole. | |
1558 | ||
1559 | Note loop condition -- if the range has 1 byte, we can't divide the range | |
1560 | so there's no point trying further. */ | |
1561 | while (current_end - current_begin > 1) | |
1562 | { | |
1563 | ULONGEST first_half_begin, first_half_end; | |
1564 | ULONGEST second_half_begin, second_half_end; | |
1565 | LONGEST xfer; | |
279a6fed | 1566 | ULONGEST middle = current_begin + (current_end - current_begin) / 2; |
f1a507a1 | 1567 | |
8dedea02 VP |
1568 | if (forward) |
1569 | { | |
1570 | first_half_begin = current_begin; | |
1571 | first_half_end = middle; | |
1572 | second_half_begin = middle; | |
1573 | second_half_end = current_end; | |
1574 | } | |
1575 | else | |
1576 | { | |
1577 | first_half_begin = middle; | |
1578 | first_half_end = current_end; | |
1579 | second_half_begin = current_begin; | |
1580 | second_half_end = middle; | |
1581 | } | |
1582 | ||
1583 | xfer = target_read (ops, TARGET_OBJECT_MEMORY, NULL, | |
386c8614 | 1584 | buf.get () + (first_half_begin - begin) * unit_size, |
8dedea02 VP |
1585 | first_half_begin, |
1586 | first_half_end - first_half_begin); | |
1587 | ||
1588 | if (xfer == first_half_end - first_half_begin) | |
1589 | { | |
c378eb4e | 1590 | /* This half reads up fine. So, the error must be in the |
3e43a32a | 1591 | other half. */ |
8dedea02 VP |
1592 | current_begin = second_half_begin; |
1593 | current_end = second_half_end; | |
1594 | } | |
1595 | else | |
1596 | { | |
c378eb4e | 1597 | /* This half is not readable. Because we've tried one byte, we |
279a6fed | 1598 | know some part of this half if actually readable. Go to the next |
8dedea02 VP |
1599 | iteration to divide again and try to read. |
1600 | ||
1601 | We don't handle the other half, because this function only tries | |
1602 | to read a single readable subrange. */ | |
1603 | current_begin = first_half_begin; | |
1604 | current_end = first_half_end; | |
1605 | } | |
1606 | } | |
1607 | ||
1608 | if (forward) | |
1609 | { | |
1610 | /* The [begin, current_begin) range has been read. */ | |
386c8614 | 1611 | result->emplace_back (begin, current_end, std::move (buf)); |
8dedea02 VP |
1612 | } |
1613 | else | |
1614 | { | |
1615 | /* The [current_end, end) range has been read. */ | |
279a6fed | 1616 | LONGEST region_len = end - current_end; |
f1a507a1 | 1617 | |
386c8614 TT |
1618 | gdb::unique_xmalloc_ptr<gdb_byte> data |
1619 | ((gdb_byte *) xmalloc (region_len * unit_size)); | |
1620 | memcpy (data.get (), buf.get () + (current_end - begin) * unit_size, | |
d309493c | 1621 | region_len * unit_size); |
386c8614 | 1622 | result->emplace_back (current_end, end, std::move (data)); |
8dedea02 | 1623 | } |
8dedea02 VP |
1624 | } |
1625 | ||
386c8614 | 1626 | std::vector<memory_read_result> |
279a6fed SM |
1627 | read_memory_robust (struct target_ops *ops, |
1628 | const ULONGEST offset, const LONGEST len) | |
8dedea02 | 1629 | { |
386c8614 | 1630 | std::vector<memory_read_result> result; |
d309493c | 1631 | int unit_size = gdbarch_addressable_memory_unit_size (target_gdbarch ()); |
8dedea02 | 1632 | |
279a6fed SM |
1633 | LONGEST xfered_total = 0; |
1634 | while (xfered_total < len) | |
d5086790 | 1635 | { |
279a6fed SM |
1636 | struct mem_region *region = lookup_mem_region (offset + xfered_total); |
1637 | LONGEST region_len; | |
5d502164 | 1638 | |
8dedea02 VP |
1639 | /* If there is no explicit region, a fake one should be created. */ |
1640 | gdb_assert (region); | |
1641 | ||
1642 | if (region->hi == 0) | |
279a6fed | 1643 | region_len = len - xfered_total; |
8dedea02 | 1644 | else |
279a6fed | 1645 | region_len = region->hi - offset; |
8dedea02 VP |
1646 | |
1647 | if (region->attrib.mode == MEM_NONE || region->attrib.mode == MEM_WO) | |
d5086790 | 1648 | { |
c378eb4e | 1649 | /* Cannot read this region. Note that we can end up here only |
8dedea02 VP |
1650 | if the region is explicitly marked inaccessible, or |
1651 | 'inaccessible-by-default' is in effect. */ | |
279a6fed | 1652 | xfered_total += region_len; |
8dedea02 VP |
1653 | } |
1654 | else | |
1655 | { | |
325fac50 | 1656 | LONGEST to_read = std::min (len - xfered_total, region_len); |
386c8614 TT |
1657 | gdb::unique_xmalloc_ptr<gdb_byte> buffer |
1658 | ((gdb_byte *) xmalloc (to_read * unit_size)); | |
8dedea02 | 1659 | |
279a6fed | 1660 | LONGEST xfered_partial = |
386c8614 | 1661 | target_read (ops, TARGET_OBJECT_MEMORY, NULL, buffer.get (), |
279a6fed | 1662 | offset + xfered_total, to_read); |
8dedea02 | 1663 | /* Call an observer, notifying them of the xfer progress? */ |
279a6fed | 1664 | if (xfered_partial <= 0) |
d5086790 | 1665 | { |
c378eb4e | 1666 | /* Got an error reading full chunk. See if maybe we can read |
8dedea02 | 1667 | some subrange. */ |
e084c964 DB |
1668 | read_whatever_is_readable (ops, offset + xfered_total, |
1669 | offset + xfered_total + to_read, | |
1670 | unit_size, &result); | |
279a6fed | 1671 | xfered_total += to_read; |
d5086790 | 1672 | } |
8dedea02 VP |
1673 | else |
1674 | { | |
386c8614 TT |
1675 | result.emplace_back (offset + xfered_total, |
1676 | offset + xfered_total + xfered_partial, | |
1677 | std::move (buffer)); | |
279a6fed | 1678 | xfered_total += xfered_partial; |
8dedea02 VP |
1679 | } |
1680 | QUIT; | |
d5086790 | 1681 | } |
d5086790 | 1682 | } |
9d78f827 | 1683 | |
8dedea02 | 1684 | return result; |
d5086790 VP |
1685 | } |
1686 | ||
8dedea02 | 1687 | |
cf7a04e8 DJ |
1688 | /* An alternative to target_write with progress callbacks. */ |
1689 | ||
1e3ff5ad | 1690 | LONGEST |
cf7a04e8 DJ |
1691 | target_write_with_progress (struct target_ops *ops, |
1692 | enum target_object object, | |
1693 | const char *annex, const gdb_byte *buf, | |
1694 | ULONGEST offset, LONGEST len, | |
1695 | void (*progress) (ULONGEST, void *), void *baton) | |
1e3ff5ad | 1696 | { |
279a6fed | 1697 | LONGEST xfered_total = 0; |
d309493c SM |
1698 | int unit_size = 1; |
1699 | ||
1700 | /* If we are writing to a memory object, find the length of an addressable | |
1701 | unit for that architecture. */ | |
1702 | if (object == TARGET_OBJECT_MEMORY | |
1703 | || object == TARGET_OBJECT_STACK_MEMORY | |
1704 | || object == TARGET_OBJECT_CODE_MEMORY | |
1705 | || object == TARGET_OBJECT_RAW_MEMORY) | |
1706 | unit_size = gdbarch_addressable_memory_unit_size (target_gdbarch ()); | |
a76d924d DJ |
1707 | |
1708 | /* Give the progress callback a chance to set up. */ | |
1709 | if (progress) | |
1710 | (*progress) (0, baton); | |
1711 | ||
279a6fed | 1712 | while (xfered_total < len) |
1e3ff5ad | 1713 | { |
279a6fed | 1714 | ULONGEST xfered_partial; |
9b409511 YQ |
1715 | enum target_xfer_status status; |
1716 | ||
1717 | status = target_write_partial (ops, object, annex, | |
d309493c | 1718 | buf + xfered_total * unit_size, |
279a6fed SM |
1719 | offset + xfered_total, len - xfered_total, |
1720 | &xfered_partial); | |
cf7a04e8 | 1721 | |
5c328c05 | 1722 | if (status != TARGET_XFER_OK) |
279a6fed | 1723 | return status == TARGET_XFER_EOF ? xfered_total : TARGET_XFER_E_IO; |
cf7a04e8 DJ |
1724 | |
1725 | if (progress) | |
279a6fed | 1726 | (*progress) (xfered_partial, baton); |
cf7a04e8 | 1727 | |
279a6fed | 1728 | xfered_total += xfered_partial; |
1e3ff5ad AC |
1729 | QUIT; |
1730 | } | |
1731 | return len; | |
1732 | } | |
1733 | ||
7f79c47e DE |
1734 | /* For docs on target_write see target.h. */ |
1735 | ||
cf7a04e8 DJ |
1736 | LONGEST |
1737 | target_write (struct target_ops *ops, | |
1738 | enum target_object object, | |
1739 | const char *annex, const gdb_byte *buf, | |
1740 | ULONGEST offset, LONGEST len) | |
1741 | { | |
1742 | return target_write_with_progress (ops, object, annex, buf, offset, len, | |
1743 | NULL, NULL); | |
1744 | } | |
1745 | ||
9018be22 SM |
1746 | /* Help for target_read_alloc and target_read_stralloc. See their comments |
1747 | for details. */ | |
13547ab6 | 1748 | |
9018be22 SM |
1749 | template <typename T> |
1750 | gdb::optional<gdb::def_vector<T>> | |
159f81f3 | 1751 | target_read_alloc_1 (struct target_ops *ops, enum target_object object, |
9018be22 | 1752 | const char *annex) |
13547ab6 | 1753 | { |
9018be22 SM |
1754 | gdb::def_vector<T> buf; |
1755 | size_t buf_pos = 0; | |
1756 | const int chunk = 4096; | |
13547ab6 DJ |
1757 | |
1758 | /* This function does not have a length parameter; it reads the | |
1759 | entire OBJECT). Also, it doesn't support objects fetched partly | |
1760 | from one target and partly from another (in a different stratum, | |
1761 | e.g. a core file and an executable). Both reasons make it | |
1762 | unsuitable for reading memory. */ | |
1763 | gdb_assert (object != TARGET_OBJECT_MEMORY); | |
1764 | ||
1765 | /* Start by reading up to 4K at a time. The target will throttle | |
1766 | this number down if necessary. */ | |
13547ab6 DJ |
1767 | while (1) |
1768 | { | |
9b409511 YQ |
1769 | ULONGEST xfered_len; |
1770 | enum target_xfer_status status; | |
1771 | ||
9018be22 SM |
1772 | buf.resize (buf_pos + chunk); |
1773 | ||
1774 | status = target_read_partial (ops, object, annex, | |
1775 | (gdb_byte *) &buf[buf_pos], | |
1776 | buf_pos, chunk, | |
9b409511 YQ |
1777 | &xfered_len); |
1778 | ||
1779 | if (status == TARGET_XFER_EOF) | |
13547ab6 DJ |
1780 | { |
1781 | /* Read all there was. */ | |
9018be22 SM |
1782 | buf.resize (buf_pos); |
1783 | return buf; | |
13547ab6 | 1784 | } |
9b409511 YQ |
1785 | else if (status != TARGET_XFER_OK) |
1786 | { | |
1787 | /* An error occurred. */ | |
9018be22 | 1788 | return {}; |
9b409511 | 1789 | } |
13547ab6 | 1790 | |
9b409511 | 1791 | buf_pos += xfered_len; |
13547ab6 | 1792 | |
13547ab6 DJ |
1793 | QUIT; |
1794 | } | |
1795 | } | |
1796 | ||
9018be22 | 1797 | /* See target.h */ |
159f81f3 | 1798 | |
9018be22 | 1799 | gdb::optional<gdb::byte_vector> |
159f81f3 | 1800 | target_read_alloc (struct target_ops *ops, enum target_object object, |
9018be22 | 1801 | const char *annex) |
159f81f3 | 1802 | { |
9018be22 | 1803 | return target_read_alloc_1<gdb_byte> (ops, object, annex); |
159f81f3 DJ |
1804 | } |
1805 | ||
b7b030ad | 1806 | /* See target.h. */ |
159f81f3 | 1807 | |
9018be22 | 1808 | gdb::optional<gdb::char_vector> |
159f81f3 DJ |
1809 | target_read_stralloc (struct target_ops *ops, enum target_object object, |
1810 | const char *annex) | |
1811 | { | |
9018be22 SM |
1812 | gdb::optional<gdb::char_vector> buf |
1813 | = target_read_alloc_1<char> (ops, object, annex); | |
159f81f3 | 1814 | |
9018be22 SM |
1815 | if (!buf) |
1816 | return {}; | |
159f81f3 | 1817 | |
d00a27c5 | 1818 | if (buf->empty () || buf->back () != '\0') |
9018be22 | 1819 | buf->push_back ('\0'); |
7313baad UW |
1820 | |
1821 | /* Check for embedded NUL bytes; but allow trailing NULs. */ | |
9018be22 SM |
1822 | for (auto it = std::find (buf->begin (), buf->end (), '\0'); |
1823 | it != buf->end (); it++) | |
1824 | if (*it != '\0') | |
7313baad UW |
1825 | { |
1826 | warning (_("target object %d, annex %s, " | |
1827 | "contained unexpected null characters"), | |
1828 | (int) object, annex ? annex : "(none)"); | |
1829 | break; | |
1830 | } | |
159f81f3 | 1831 | |
9018be22 | 1832 | return buf; |
159f81f3 DJ |
1833 | } |
1834 | ||
b6591e8b AC |
1835 | /* Memory transfer methods. */ |
1836 | ||
1837 | void | |
1b0ba102 | 1838 | get_target_memory (struct target_ops *ops, CORE_ADDR addr, gdb_byte *buf, |
b6591e8b AC |
1839 | LONGEST len) |
1840 | { | |
07b82ea5 PA |
1841 | /* This method is used to read from an alternate, non-current |
1842 | target. This read must bypass the overlay support (as symbols | |
1843 | don't match this target), and GDB's internal cache (wrong cache | |
1844 | for this target). */ | |
1845 | if (target_read (ops, TARGET_OBJECT_RAW_MEMORY, NULL, buf, addr, len) | |
b6591e8b | 1846 | != len) |
578d3588 | 1847 | memory_error (TARGET_XFER_E_IO, addr); |
b6591e8b AC |
1848 | } |
1849 | ||
1850 | ULONGEST | |
5d502164 MS |
1851 | get_target_memory_unsigned (struct target_ops *ops, CORE_ADDR addr, |
1852 | int len, enum bfd_endian byte_order) | |
b6591e8b | 1853 | { |
f6519ebc | 1854 | gdb_byte buf[sizeof (ULONGEST)]; |
b6591e8b AC |
1855 | |
1856 | gdb_assert (len <= sizeof (buf)); | |
1857 | get_target_memory (ops, addr, buf, len); | |
e17a4113 | 1858 | return extract_unsigned_integer (buf, len, byte_order); |
b6591e8b AC |
1859 | } |
1860 | ||
3db08215 MM |
1861 | /* See target.h. */ |
1862 | ||
d914c394 SS |
1863 | int |
1864 | target_insert_breakpoint (struct gdbarch *gdbarch, | |
1865 | struct bp_target_info *bp_tgt) | |
1866 | { | |
1867 | if (!may_insert_breakpoints) | |
1868 | { | |
1869 | warning (_("May not insert breakpoints")); | |
1870 | return 1; | |
1871 | } | |
1872 | ||
8b88a78e | 1873 | return current_top_target ()->insert_breakpoint (gdbarch, bp_tgt); |
d914c394 SS |
1874 | } |
1875 | ||
3db08215 MM |
1876 | /* See target.h. */ |
1877 | ||
d914c394 | 1878 | int |
6b84065d | 1879 | target_remove_breakpoint (struct gdbarch *gdbarch, |
73971819 PA |
1880 | struct bp_target_info *bp_tgt, |
1881 | enum remove_bp_reason reason) | |
d914c394 SS |
1882 | { |
1883 | /* This is kind of a weird case to handle, but the permission might | |
1884 | have been changed after breakpoints were inserted - in which case | |
1885 | we should just take the user literally and assume that any | |
1886 | breakpoints should be left in place. */ | |
1887 | if (!may_insert_breakpoints) | |
1888 | { | |
1889 | warning (_("May not remove breakpoints")); | |
1890 | return 1; | |
1891 | } | |
1892 | ||
8b88a78e | 1893 | return current_top_target ()->remove_breakpoint (gdbarch, bp_tgt, reason); |
d914c394 SS |
1894 | } |
1895 | ||
c906108c | 1896 | static void |
1d12d88f | 1897 | info_target_command (const char *args, int from_tty) |
c906108c | 1898 | { |
c906108c | 1899 | int has_all_mem = 0; |
c5aa993b | 1900 | |
c906108c | 1901 | if (symfile_objfile != NULL) |
4262abfb JK |
1902 | printf_unfiltered (_("Symbols from \"%s\".\n"), |
1903 | objfile_name (symfile_objfile)); | |
c906108c | 1904 | |
b6a8c27b | 1905 | for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
c906108c | 1906 | { |
f6ac5f3d | 1907 | if (!t->has_memory ()) |
c906108c SS |
1908 | continue; |
1909 | ||
66b4deae | 1910 | if ((int) (t->stratum ()) <= (int) dummy_stratum) |
c906108c SS |
1911 | continue; |
1912 | if (has_all_mem) | |
3e43a32a MS |
1913 | printf_unfiltered (_("\tWhile running this, " |
1914 | "GDB does not access memory from...\n")); | |
f6ac5f3d PA |
1915 | printf_unfiltered ("%s:\n", t->longname ()); |
1916 | t->files_info (); | |
1917 | has_all_mem = t->has_all_memory (); | |
c906108c SS |
1918 | } |
1919 | } | |
1920 | ||
fd79ecee DJ |
1921 | /* This function is called before any new inferior is created, e.g. |
1922 | by running a program, attaching, or connecting to a target. | |
1923 | It cleans up any state from previous invocations which might | |
1924 | change between runs. This is a subset of what target_preopen | |
1925 | resets (things which might change between targets). */ | |
1926 | ||
1927 | void | |
1928 | target_pre_inferior (int from_tty) | |
1929 | { | |
c378eb4e | 1930 | /* Clear out solib state. Otherwise the solib state of the previous |
b9db4ced | 1931 | inferior might have survived and is entirely wrong for the new |
c378eb4e | 1932 | target. This has been observed on GNU/Linux using glibc 2.3. How |
b9db4ced UW |
1933 | to reproduce: |
1934 | ||
1935 | bash$ ./foo& | |
1936 | [1] 4711 | |
1937 | bash$ ./foo& | |
1938 | [1] 4712 | |
1939 | bash$ gdb ./foo | |
1940 | [...] | |
1941 | (gdb) attach 4711 | |
1942 | (gdb) detach | |
1943 | (gdb) attach 4712 | |
1944 | Cannot access memory at address 0xdeadbeef | |
1945 | */ | |
b9db4ced | 1946 | |
50c71eaf PA |
1947 | /* In some OSs, the shared library list is the same/global/shared |
1948 | across inferiors. If code is shared between processes, so are | |
1949 | memory regions and features. */ | |
f5656ead | 1950 | if (!gdbarch_has_global_solist (target_gdbarch ())) |
50c71eaf PA |
1951 | { |
1952 | no_shared_libraries (NULL, from_tty); | |
1953 | ||
1954 | invalidate_target_mem_regions (); | |
424163ea | 1955 | |
50c71eaf PA |
1956 | target_clear_description (); |
1957 | } | |
8ffcbaaf | 1958 | |
e9756d52 PP |
1959 | /* attach_flag may be set if the previous process associated with |
1960 | the inferior was attached to. */ | |
1961 | current_inferior ()->attach_flag = 0; | |
1962 | ||
5d5658a1 PA |
1963 | current_inferior ()->highest_thread_num = 0; |
1964 | ||
8ffcbaaf | 1965 | agent_capability_invalidate (); |
fd79ecee DJ |
1966 | } |
1967 | ||
c906108c SS |
1968 | /* This is to be called by the open routine before it does |
1969 | anything. */ | |
1970 | ||
1971 | void | |
fba45db2 | 1972 | target_preopen (int from_tty) |
c906108c | 1973 | { |
c5aa993b | 1974 | dont_repeat (); |
c906108c | 1975 | |
5b6d1e4f | 1976 | if (current_inferior ()->pid != 0) |
c5aa993b | 1977 | { |
adf40b2e | 1978 | if (!from_tty |
5b6d1e4f | 1979 | || !target_has_execution |
b8fa0bfa | 1980 | || query (_("A program is being debugged already. Kill it? "))) |
5b6d1e4f PA |
1981 | { |
1982 | /* Core inferiors actually should be detached, not | |
1983 | killed. */ | |
1984 | if (target_has_execution) | |
1985 | target_kill (); | |
1986 | else | |
1987 | target_detach (current_inferior (), 0); | |
1988 | } | |
c906108c | 1989 | else |
8a3fe4f8 | 1990 | error (_("Program not killed.")); |
c906108c SS |
1991 | } |
1992 | ||
1993 | /* Calling target_kill may remove the target from the stack. But if | |
1994 | it doesn't (which seems like a win for UDI), remove it now. */ | |
87ab71f0 PA |
1995 | /* Leave the exec target, though. The user may be switching from a |
1996 | live process to a core of the same program. */ | |
460014f5 | 1997 | pop_all_targets_above (file_stratum); |
fd79ecee DJ |
1998 | |
1999 | target_pre_inferior (from_tty); | |
c906108c SS |
2000 | } |
2001 | ||
6bd6f3b6 | 2002 | /* See target.h. */ |
c906108c SS |
2003 | |
2004 | void | |
6e1e1966 | 2005 | target_detach (inferior *inf, int from_tty) |
c906108c | 2006 | { |
5783e150 PW |
2007 | /* After we have detached, we will clear the register cache for this inferior |
2008 | by calling registers_changed_ptid. We must save the pid_ptid before | |
2009 | detaching, as the target detach method will clear inf->pid. */ | |
2010 | ptid_t save_pid_ptid = ptid_t (inf->pid); | |
2011 | ||
6e1e1966 SM |
2012 | /* As long as some to_detach implementations rely on the current_inferior |
2013 | (either directly, or indirectly, like through target_gdbarch or by | |
2014 | reading memory), INF needs to be the current inferior. When that | |
2015 | requirement will become no longer true, then we can remove this | |
2016 | assertion. */ | |
2017 | gdb_assert (inf == current_inferior ()); | |
2018 | ||
f5656ead | 2019 | if (gdbarch_has_global_breakpoints (target_gdbarch ())) |
50c71eaf PA |
2020 | /* Don't remove global breakpoints here. They're removed on |
2021 | disconnection from the target. */ | |
2022 | ; | |
2023 | else | |
2024 | /* If we're in breakpoints-always-inserted mode, have to remove | |
00431a78 PA |
2025 | breakpoints before detaching. */ |
2026 | remove_breakpoints_inf (current_inferior ()); | |
74960c60 | 2027 | |
24291992 PA |
2028 | prepare_for_detach (); |
2029 | ||
5b6d1e4f PA |
2030 | /* Hold a strong reference because detaching may unpush the |
2031 | target. */ | |
2032 | auto proc_target_ref = target_ops_ref::new_reference (inf->process_target ()); | |
2033 | ||
8b88a78e | 2034 | current_top_target ()->detach (inf, from_tty); |
799efbe8 | 2035 | |
5b6d1e4f PA |
2036 | process_stratum_target *proc_target |
2037 | = as_process_stratum_target (proc_target_ref.get ()); | |
2038 | ||
2039 | registers_changed_ptid (proc_target, save_pid_ptid); | |
799efbe8 PW |
2040 | |
2041 | /* We have to ensure we have no frame cache left. Normally, | |
5783e150 PW |
2042 | registers_changed_ptid (save_pid_ptid) calls reinit_frame_cache when |
2043 | inferior_ptid matches save_pid_ptid, but in our case, it does not | |
799efbe8 PW |
2044 | call it, as inferior_ptid has been reset. */ |
2045 | reinit_frame_cache (); | |
c906108c SS |
2046 | } |
2047 | ||
6ad8ae5c | 2048 | void |
fee354ee | 2049 | target_disconnect (const char *args, int from_tty) |
6ad8ae5c | 2050 | { |
50c71eaf PA |
2051 | /* If we're in breakpoints-always-inserted mode or if breakpoints |
2052 | are global across processes, we have to remove them before | |
2053 | disconnecting. */ | |
74960c60 VP |
2054 | remove_breakpoints (); |
2055 | ||
8b88a78e | 2056 | current_top_target ()->disconnect (args, from_tty); |
6ad8ae5c DJ |
2057 | } |
2058 | ||
f2b9e3df SDJ |
2059 | /* See target/target.h. */ |
2060 | ||
117de6a9 | 2061 | ptid_t |
47608cb1 | 2062 | target_wait (ptid_t ptid, struct target_waitstatus *status, int options) |
117de6a9 | 2063 | { |
8b88a78e | 2064 | return current_top_target ()->wait (ptid, status, options); |
117de6a9 PA |
2065 | } |
2066 | ||
0b333c5e PA |
2067 | /* See target.h. */ |
2068 | ||
2069 | ptid_t | |
2070 | default_target_wait (struct target_ops *ops, | |
2071 | ptid_t ptid, struct target_waitstatus *status, | |
2072 | int options) | |
2073 | { | |
2074 | status->kind = TARGET_WAITKIND_IGNORE; | |
2075 | return minus_one_ptid; | |
2076 | } | |
2077 | ||
a068643d | 2078 | std::string |
117de6a9 PA |
2079 | target_pid_to_str (ptid_t ptid) |
2080 | { | |
8b88a78e | 2081 | return current_top_target ()->pid_to_str (ptid); |
117de6a9 PA |
2082 | } |
2083 | ||
73ede765 | 2084 | const char * |
4694da01 TT |
2085 | target_thread_name (struct thread_info *info) |
2086 | { | |
5b6d1e4f PA |
2087 | gdb_assert (info->inf == current_inferior ()); |
2088 | ||
8b88a78e | 2089 | return current_top_target ()->thread_name (info); |
4694da01 TT |
2090 | } |
2091 | ||
e04ee09e KB |
2092 | struct thread_info * |
2093 | target_thread_handle_to_thread_info (const gdb_byte *thread_handle, | |
2094 | int handle_len, | |
2095 | struct inferior *inf) | |
2096 | { | |
8b88a78e | 2097 | return current_top_target ()->thread_handle_to_thread_info (thread_handle, |
f6ac5f3d | 2098 | handle_len, inf); |
e04ee09e KB |
2099 | } |
2100 | ||
3d6c6204 KB |
2101 | /* See target.h. */ |
2102 | ||
2103 | gdb::byte_vector | |
2104 | target_thread_info_to_thread_handle (struct thread_info *tip) | |
2105 | { | |
2106 | return current_top_target ()->thread_info_to_thread_handle (tip); | |
2107 | } | |
2108 | ||
e1ac3328 | 2109 | void |
2ea28649 | 2110 | target_resume (ptid_t ptid, int step, enum gdb_signal signal) |
e1ac3328 | 2111 | { |
5b6d1e4f PA |
2112 | process_stratum_target *curr_target = current_inferior ()->process_target (); |
2113 | ||
4e5d721f | 2114 | target_dcache_invalidate (); |
28439f5e | 2115 | |
8b88a78e | 2116 | current_top_target ()->resume (ptid, step, signal); |
28439f5e | 2117 | |
5b6d1e4f | 2118 | registers_changed_ptid (curr_target, ptid); |
251bde03 | 2119 | /* We only set the internal executing state here. The user/frontend |
f2ffa92b PA |
2120 | running state is set at a higher level. This also clears the |
2121 | thread's stop_pc as side effect. */ | |
5b6d1e4f PA |
2122 | set_executing (curr_target, ptid, 1); |
2123 | clear_inline_frame_state (curr_target, ptid); | |
e1ac3328 | 2124 | } |
2455069d | 2125 | |
85ad3aaf PA |
2126 | /* If true, target_commit_resume is a nop. */ |
2127 | static int defer_target_commit_resume; | |
2128 | ||
2129 | /* See target.h. */ | |
2130 | ||
2131 | void | |
2132 | target_commit_resume (void) | |
2133 | { | |
85ad3aaf PA |
2134 | if (defer_target_commit_resume) |
2135 | return; | |
2136 | ||
8b88a78e | 2137 | current_top_target ()->commit_resume (); |
85ad3aaf PA |
2138 | } |
2139 | ||
2140 | /* See target.h. */ | |
2141 | ||
a9bc57b9 TT |
2142 | scoped_restore_tmpl<int> |
2143 | make_scoped_defer_target_commit_resume () | |
85ad3aaf | 2144 | { |
a9bc57b9 | 2145 | return make_scoped_restore (&defer_target_commit_resume, 1); |
85ad3aaf PA |
2146 | } |
2147 | ||
2455069d | 2148 | void |
adc6a863 | 2149 | target_pass_signals (gdb::array_view<const unsigned char> pass_signals) |
2455069d | 2150 | { |
adc6a863 | 2151 | current_top_target ()->pass_signals (pass_signals); |
2455069d UW |
2152 | } |
2153 | ||
9b224c5e | 2154 | void |
adc6a863 | 2155 | target_program_signals (gdb::array_view<const unsigned char> program_signals) |
9b224c5e | 2156 | { |
adc6a863 | 2157 | current_top_target ()->program_signals (program_signals); |
9b224c5e PA |
2158 | } |
2159 | ||
098dba18 TT |
2160 | static int |
2161 | default_follow_fork (struct target_ops *self, int follow_child, | |
2162 | int detach_fork) | |
2163 | { | |
2164 | /* Some target returned a fork event, but did not know how to follow it. */ | |
2165 | internal_error (__FILE__, __LINE__, | |
2166 | _("could not find a target to follow fork")); | |
2167 | } | |
2168 | ||
ee057212 DJ |
2169 | /* Look through the list of possible targets for a target that can |
2170 | follow forks. */ | |
2171 | ||
2172 | int | |
07107ca6 | 2173 | target_follow_fork (int follow_child, int detach_fork) |
ee057212 | 2174 | { |
8b88a78e | 2175 | return current_top_target ()->follow_fork (follow_child, detach_fork); |
ee057212 DJ |
2176 | } |
2177 | ||
94585166 DB |
2178 | /* Target wrapper for follow exec hook. */ |
2179 | ||
2180 | void | |
4ca51187 | 2181 | target_follow_exec (struct inferior *inf, const char *execd_pathname) |
94585166 | 2182 | { |
8b88a78e | 2183 | current_top_target ()->follow_exec (inf, execd_pathname); |
94585166 DB |
2184 | } |
2185 | ||
8d657035 TT |
2186 | static void |
2187 | default_mourn_inferior (struct target_ops *self) | |
2188 | { | |
2189 | internal_error (__FILE__, __LINE__, | |
2190 | _("could not find a target to follow mourn inferior")); | |
2191 | } | |
2192 | ||
136d6dae | 2193 | void |
bc1e6c81 | 2194 | target_mourn_inferior (ptid_t ptid) |
136d6dae | 2195 | { |
d7e15655 | 2196 | gdb_assert (ptid == inferior_ptid); |
8b88a78e | 2197 | current_top_target ()->mourn_inferior (); |
136d6dae | 2198 | |
8d657035 TT |
2199 | /* We no longer need to keep handles on any of the object files. |
2200 | Make sure to release them to avoid unnecessarily locking any | |
2201 | of them while we're not actually debugging. */ | |
2202 | bfd_cache_close_all (); | |
136d6dae VP |
2203 | } |
2204 | ||
424163ea DJ |
2205 | /* Look for a target which can describe architectural features, starting |
2206 | from TARGET. If we find one, return its description. */ | |
2207 | ||
2208 | const struct target_desc * | |
2209 | target_read_description (struct target_ops *target) | |
2210 | { | |
f6ac5f3d | 2211 | return target->read_description (); |
424163ea DJ |
2212 | } |
2213 | ||
58a5184e | 2214 | /* This implements a basic search of memory, reading target memory and |
08388c79 DE |
2215 | performing the search here (as opposed to performing the search in on the |
2216 | target side with, for example, gdbserver). */ | |
2217 | ||
2218 | int | |
2219 | simple_search_memory (struct target_ops *ops, | |
2220 | CORE_ADDR start_addr, ULONGEST search_space_len, | |
2221 | const gdb_byte *pattern, ULONGEST pattern_len, | |
2222 | CORE_ADDR *found_addrp) | |
2223 | { | |
2224 | /* NOTE: also defined in find.c testcase. */ | |
2225 | #define SEARCH_CHUNK_SIZE 16000 | |
2226 | const unsigned chunk_size = SEARCH_CHUNK_SIZE; | |
2227 | /* Buffer to hold memory contents for searching. */ | |
08388c79 | 2228 | unsigned search_buf_size; |
08388c79 DE |
2229 | |
2230 | search_buf_size = chunk_size + pattern_len - 1; | |
2231 | ||
2232 | /* No point in trying to allocate a buffer larger than the search space. */ | |
2233 | if (search_space_len < search_buf_size) | |
2234 | search_buf_size = search_space_len; | |
2235 | ||
26fcd5d7 | 2236 | gdb::byte_vector search_buf (search_buf_size); |
08388c79 DE |
2237 | |
2238 | /* Prime the search buffer. */ | |
2239 | ||
2240 | if (target_read (ops, TARGET_OBJECT_MEMORY, NULL, | |
26fcd5d7 TT |
2241 | search_buf.data (), start_addr, search_buf_size) |
2242 | != search_buf_size) | |
08388c79 | 2243 | { |
b3dc46ff AB |
2244 | warning (_("Unable to access %s bytes of target " |
2245 | "memory at %s, halting search."), | |
2246 | pulongest (search_buf_size), hex_string (start_addr)); | |
08388c79 DE |
2247 | return -1; |
2248 | } | |
2249 | ||
2250 | /* Perform the search. | |
2251 | ||
2252 | The loop is kept simple by allocating [N + pattern-length - 1] bytes. | |
2253 | When we've scanned N bytes we copy the trailing bytes to the start and | |
2254 | read in another N bytes. */ | |
2255 | ||
2256 | while (search_space_len >= pattern_len) | |
2257 | { | |
2258 | gdb_byte *found_ptr; | |
325fac50 PA |
2259 | unsigned nr_search_bytes |
2260 | = std::min (search_space_len, (ULONGEST) search_buf_size); | |
08388c79 | 2261 | |
26fcd5d7 | 2262 | found_ptr = (gdb_byte *) memmem (search_buf.data (), nr_search_bytes, |
d7f3ff3e | 2263 | pattern, pattern_len); |
08388c79 DE |
2264 | |
2265 | if (found_ptr != NULL) | |
2266 | { | |
26fcd5d7 | 2267 | CORE_ADDR found_addr = start_addr + (found_ptr - search_buf.data ()); |
5d502164 | 2268 | |
08388c79 | 2269 | *found_addrp = found_addr; |
08388c79 DE |
2270 | return 1; |
2271 | } | |
2272 | ||
2273 | /* Not found in this chunk, skip to next chunk. */ | |
2274 | ||
2275 | /* Don't let search_space_len wrap here, it's unsigned. */ | |
2276 | if (search_space_len >= chunk_size) | |
2277 | search_space_len -= chunk_size; | |
2278 | else | |
2279 | search_space_len = 0; | |
2280 | ||
2281 | if (search_space_len >= pattern_len) | |
2282 | { | |
2283 | unsigned keep_len = search_buf_size - chunk_size; | |
8a35fb51 | 2284 | CORE_ADDR read_addr = start_addr + chunk_size + keep_len; |
08388c79 DE |
2285 | int nr_to_read; |
2286 | ||
2287 | /* Copy the trailing part of the previous iteration to the front | |
2288 | of the buffer for the next iteration. */ | |
2289 | gdb_assert (keep_len == pattern_len - 1); | |
26fcd5d7 | 2290 | memcpy (&search_buf[0], &search_buf[chunk_size], keep_len); |
08388c79 | 2291 | |
325fac50 PA |
2292 | nr_to_read = std::min (search_space_len - keep_len, |
2293 | (ULONGEST) chunk_size); | |
08388c79 DE |
2294 | |
2295 | if (target_read (ops, TARGET_OBJECT_MEMORY, NULL, | |
26fcd5d7 | 2296 | &search_buf[keep_len], read_addr, |
08388c79 DE |
2297 | nr_to_read) != nr_to_read) |
2298 | { | |
b3dc46ff | 2299 | warning (_("Unable to access %s bytes of target " |
9b20d036 | 2300 | "memory at %s, halting search."), |
b3dc46ff | 2301 | plongest (nr_to_read), |
08388c79 | 2302 | hex_string (read_addr)); |
08388c79 DE |
2303 | return -1; |
2304 | } | |
2305 | ||
2306 | start_addr += chunk_size; | |
2307 | } | |
2308 | } | |
2309 | ||
2310 | /* Not found. */ | |
2311 | ||
08388c79 DE |
2312 | return 0; |
2313 | } | |
2314 | ||
58a5184e TT |
2315 | /* Default implementation of memory-searching. */ |
2316 | ||
2317 | static int | |
2318 | default_search_memory (struct target_ops *self, | |
2319 | CORE_ADDR start_addr, ULONGEST search_space_len, | |
2320 | const gdb_byte *pattern, ULONGEST pattern_len, | |
2321 | CORE_ADDR *found_addrp) | |
2322 | { | |
2323 | /* Start over from the top of the target stack. */ | |
8b88a78e | 2324 | return simple_search_memory (current_top_target (), |
58a5184e TT |
2325 | start_addr, search_space_len, |
2326 | pattern, pattern_len, found_addrp); | |
2327 | } | |
2328 | ||
08388c79 DE |
2329 | /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the |
2330 | sequence of bytes in PATTERN with length PATTERN_LEN. | |
2331 | ||
2332 | The result is 1 if found, 0 if not found, and -1 if there was an error | |
2333 | requiring halting of the search (e.g. memory read error). | |
2334 | If the pattern is found the address is recorded in FOUND_ADDRP. */ | |
2335 | ||
2336 | int | |
2337 | target_search_memory (CORE_ADDR start_addr, ULONGEST search_space_len, | |
2338 | const gdb_byte *pattern, ULONGEST pattern_len, | |
2339 | CORE_ADDR *found_addrp) | |
2340 | { | |
8b88a78e | 2341 | return current_top_target ()->search_memory (start_addr, search_space_len, |
f6ac5f3d | 2342 | pattern, pattern_len, found_addrp); |
08388c79 DE |
2343 | } |
2344 | ||
8edfe269 DJ |
2345 | /* Look through the currently pushed targets. If none of them will |
2346 | be able to restart the currently running process, issue an error | |
2347 | message. */ | |
2348 | ||
2349 | void | |
2350 | target_require_runnable (void) | |
2351 | { | |
b6a8c27b | 2352 | for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
8edfe269 DJ |
2353 | { |
2354 | /* If this target knows how to create a new program, then | |
2355 | assume we will still be able to after killing the current | |
2356 | one. Either killing and mourning will not pop T, or else | |
2357 | find_default_run_target will find it again. */ | |
f6ac5f3d | 2358 | if (t->can_create_inferior ()) |
8edfe269 DJ |
2359 | return; |
2360 | ||
548740d6 | 2361 | /* Do not worry about targets at certain strata that can not |
8edfe269 DJ |
2362 | create inferiors. Assume they will be pushed again if |
2363 | necessary, and continue to the process_stratum. */ | |
66b4deae | 2364 | if (t->stratum () > process_stratum) |
8edfe269 DJ |
2365 | continue; |
2366 | ||
3e43a32a MS |
2367 | error (_("The \"%s\" target does not support \"run\". " |
2368 | "Try \"help target\" or \"continue\"."), | |
f6ac5f3d | 2369 | t->shortname ()); |
8edfe269 DJ |
2370 | } |
2371 | ||
2372 | /* This function is only called if the target is running. In that | |
2373 | case there should have been a process_stratum target and it | |
c378eb4e | 2374 | should either know how to create inferiors, or not... */ |
9b20d036 | 2375 | internal_error (__FILE__, __LINE__, _("No targets found")); |
8edfe269 DJ |
2376 | } |
2377 | ||
6a3cb8e8 PA |
2378 | /* Whether GDB is allowed to fall back to the default run target for |
2379 | "run", "attach", etc. when no target is connected yet. */ | |
491144b5 | 2380 | static bool auto_connect_native_target = true; |
6a3cb8e8 PA |
2381 | |
2382 | static void | |
2383 | show_auto_connect_native_target (struct ui_file *file, int from_tty, | |
2384 | struct cmd_list_element *c, const char *value) | |
2385 | { | |
2386 | fprintf_filtered (file, | |
2387 | _("Whether GDB may automatically connect to the " | |
2388 | "native target is %s.\n"), | |
2389 | value); | |
2390 | } | |
2391 | ||
d9f719f1 PA |
2392 | /* A pointer to the target that can respond to "run" or "attach". |
2393 | Native targets are always singletons and instantiated early at GDB | |
2394 | startup. */ | |
2395 | static target_ops *the_native_target; | |
2396 | ||
2397 | /* See target.h. */ | |
2398 | ||
2399 | void | |
2400 | set_native_target (target_ops *target) | |
2401 | { | |
2402 | if (the_native_target != NULL) | |
2403 | internal_error (__FILE__, __LINE__, | |
2404 | _("native target already set (\"%s\")."), | |
2405 | the_native_target->longname ()); | |
2406 | ||
2407 | the_native_target = target; | |
2408 | } | |
2409 | ||
2410 | /* See target.h. */ | |
2411 | ||
2412 | target_ops * | |
2413 | get_native_target () | |
2414 | { | |
2415 | return the_native_target; | |
2416 | } | |
2417 | ||
c906108c SS |
2418 | /* Look through the list of possible targets for a target that can |
2419 | execute a run or attach command without any other data. This is | |
2420 | used to locate the default process stratum. | |
2421 | ||
5f667f2d PA |
2422 | If DO_MESG is not NULL, the result is always valid (error() is |
2423 | called for errors); else, return NULL on error. */ | |
c906108c SS |
2424 | |
2425 | static struct target_ops * | |
a121b7c1 | 2426 | find_default_run_target (const char *do_mesg) |
c906108c | 2427 | { |
d9f719f1 PA |
2428 | if (auto_connect_native_target && the_native_target != NULL) |
2429 | return the_native_target; | |
c906108c | 2430 | |
d9f719f1 PA |
2431 | if (do_mesg != NULL) |
2432 | error (_("Don't know how to %s. Try \"help target\"."), do_mesg); | |
2433 | return NULL; | |
c906108c SS |
2434 | } |
2435 | ||
b3ccfe11 | 2436 | /* See target.h. */ |
c906108c | 2437 | |
b3ccfe11 TT |
2438 | struct target_ops * |
2439 | find_attach_target (void) | |
c906108c | 2440 | { |
b3ccfe11 | 2441 | /* If a target on the current stack can attach, use it. */ |
b6a8c27b | 2442 | for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
b3ccfe11 | 2443 | { |
f6ac5f3d | 2444 | if (t->can_attach ()) |
d9f719f1 | 2445 | return t; |
b3ccfe11 | 2446 | } |
c906108c | 2447 | |
b3ccfe11 | 2448 | /* Otherwise, use the default run target for attaching. */ |
d9f719f1 | 2449 | return find_default_run_target ("attach"); |
b84876c2 PA |
2450 | } |
2451 | ||
b3ccfe11 | 2452 | /* See target.h. */ |
b84876c2 | 2453 | |
b3ccfe11 TT |
2454 | struct target_ops * |
2455 | find_run_target (void) | |
9908b566 | 2456 | { |
f6ac5f3d | 2457 | /* If a target on the current stack can run, use it. */ |
b6a8c27b | 2458 | for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
b3ccfe11 | 2459 | { |
f6ac5f3d | 2460 | if (t->can_create_inferior ()) |
d9f719f1 | 2461 | return t; |
b3ccfe11 | 2462 | } |
5d502164 | 2463 | |
b3ccfe11 | 2464 | /* Otherwise, use the default run target. */ |
d9f719f1 | 2465 | return find_default_run_target ("run"); |
9908b566 VP |
2466 | } |
2467 | ||
f6ac5f3d PA |
2468 | bool |
2469 | target_ops::info_proc (const char *args, enum info_proc_what what) | |
2470 | { | |
2471 | return false; | |
2472 | } | |
2473 | ||
145b16a9 UW |
2474 | /* Implement the "info proc" command. */ |
2475 | ||
451b7c33 | 2476 | int |
7bc112c1 | 2477 | target_info_proc (const char *args, enum info_proc_what what) |
145b16a9 UW |
2478 | { |
2479 | struct target_ops *t; | |
2480 | ||
2481 | /* If we're already connected to something that can get us OS | |
2482 | related data, use it. Otherwise, try using the native | |
2483 | target. */ | |
f6ac5f3d PA |
2484 | t = find_target_at (process_stratum); |
2485 | if (t == NULL) | |
145b16a9 UW |
2486 | t = find_default_run_target (NULL); |
2487 | ||
b6a8c27b | 2488 | for (; t != NULL; t = t->beneath ()) |
145b16a9 | 2489 | { |
f6ac5f3d | 2490 | if (t->info_proc (args, what)) |
145b16a9 | 2491 | { |
145b16a9 UW |
2492 | if (targetdebug) |
2493 | fprintf_unfiltered (gdb_stdlog, | |
2494 | "target_info_proc (\"%s\", %d)\n", args, what); | |
2495 | ||
451b7c33 | 2496 | return 1; |
145b16a9 UW |
2497 | } |
2498 | } | |
2499 | ||
451b7c33 | 2500 | return 0; |
145b16a9 UW |
2501 | } |
2502 | ||
03583c20 | 2503 | static int |
2bfc0540 | 2504 | find_default_supports_disable_randomization (struct target_ops *self) |
03583c20 UW |
2505 | { |
2506 | struct target_ops *t; | |
2507 | ||
2508 | t = find_default_run_target (NULL); | |
f6ac5f3d PA |
2509 | if (t != NULL) |
2510 | return t->supports_disable_randomization (); | |
03583c20 UW |
2511 | return 0; |
2512 | } | |
2513 | ||
2514 | int | |
2515 | target_supports_disable_randomization (void) | |
2516 | { | |
8b88a78e | 2517 | return current_top_target ()->supports_disable_randomization (); |
03583c20 | 2518 | } |
9908b566 | 2519 | |
1fb77080 SDJ |
2520 | /* See target/target.h. */ |
2521 | ||
2522 | int | |
2523 | target_supports_multi_process (void) | |
2524 | { | |
8b88a78e | 2525 | return current_top_target ()->supports_multi_process (); |
1fb77080 SDJ |
2526 | } |
2527 | ||
b7b030ad TT |
2528 | /* See target.h. */ |
2529 | ||
9018be22 | 2530 | gdb::optional<gdb::char_vector> |
07e059b5 VP |
2531 | target_get_osdata (const char *type) |
2532 | { | |
07e059b5 VP |
2533 | struct target_ops *t; |
2534 | ||
739ef7fb PA |
2535 | /* If we're already connected to something that can get us OS |
2536 | related data, use it. Otherwise, try using the native | |
2537 | target. */ | |
f6ac5f3d PA |
2538 | t = find_target_at (process_stratum); |
2539 | if (t == NULL) | |
739ef7fb | 2540 | t = find_default_run_target ("get OS data"); |
07e059b5 VP |
2541 | |
2542 | if (!t) | |
9018be22 | 2543 | return {}; |
07e059b5 | 2544 | |
6d097e65 | 2545 | return target_read_stralloc (t, TARGET_OBJECT_OSDATA, type); |
07e059b5 VP |
2546 | } |
2547 | ||
8eaff7cd TT |
2548 | /* Determine the current address space of thread PTID. */ |
2549 | ||
2550 | struct address_space * | |
2551 | target_thread_address_space (ptid_t ptid) | |
2552 | { | |
2553 | struct address_space *aspace; | |
2554 | ||
8b88a78e | 2555 | aspace = current_top_target ()->thread_address_space (ptid); |
8eaff7cd TT |
2556 | gdb_assert (aspace != NULL); |
2557 | ||
8eaff7cd TT |
2558 | return aspace; |
2559 | } | |
2560 | ||
b6a8c27b PA |
2561 | /* See target.h. */ |
2562 | ||
2563 | target_ops * | |
2564 | target_ops::beneath () const | |
2565 | { | |
5b6d1e4f | 2566 | return current_inferior ()->find_target_beneath (this); |
b6a8c27b PA |
2567 | } |
2568 | ||
f6ac5f3d PA |
2569 | void |
2570 | target_ops::close () | |
2571 | { | |
2572 | } | |
2573 | ||
2574 | bool | |
2575 | target_ops::can_attach () | |
2576 | { | |
2577 | return 0; | |
2578 | } | |
2579 | ||
2580 | void | |
2581 | target_ops::attach (const char *, int) | |
2582 | { | |
2583 | gdb_assert_not_reached ("target_ops::attach called"); | |
2584 | } | |
2585 | ||
2586 | bool | |
2587 | target_ops::can_create_inferior () | |
2588 | { | |
2589 | return 0; | |
2590 | } | |
2591 | ||
2592 | void | |
2593 | target_ops::create_inferior (const char *, const std::string &, | |
2594 | char **, int) | |
2595 | { | |
2596 | gdb_assert_not_reached ("target_ops::create_inferior called"); | |
2597 | } | |
2598 | ||
57810aa7 | 2599 | bool |
f6ac5f3d PA |
2600 | target_ops::can_run () |
2601 | { | |
57810aa7 | 2602 | return false; |
f6ac5f3d PA |
2603 | } |
2604 | ||
2605 | int | |
2606 | target_can_run () | |
2607 | { | |
b6a8c27b | 2608 | for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
f6ac5f3d PA |
2609 | { |
2610 | if (t->can_run ()) | |
2611 | return 1; | |
2612 | } | |
2613 | ||
2614 | return 0; | |
2615 | } | |
7313baad UW |
2616 | |
2617 | /* Target file operations. */ | |
2618 | ||
2619 | static struct target_ops * | |
2620 | default_fileio_target (void) | |
2621 | { | |
f6ac5f3d PA |
2622 | struct target_ops *t; |
2623 | ||
7313baad UW |
2624 | /* If we're already connected to something that can perform |
2625 | file I/O, use it. Otherwise, try using the native target. */ | |
f6ac5f3d PA |
2626 | t = find_target_at (process_stratum); |
2627 | if (t != NULL) | |
2628 | return t; | |
2629 | return find_default_run_target ("file I/O"); | |
7313baad UW |
2630 | } |
2631 | ||
1c4b552b GB |
2632 | /* File handle for target file operations. */ |
2633 | ||
5ff79300 | 2634 | struct fileio_fh_t |
1c4b552b | 2635 | { |
20db9c52 PA |
2636 | /* The target on which this file is open. NULL if the target is |
2637 | meanwhile closed while the handle is open. */ | |
5ff79300 | 2638 | target_ops *target; |
1c4b552b GB |
2639 | |
2640 | /* The file descriptor on the target. */ | |
5ff79300 | 2641 | int target_fd; |
1c4b552b | 2642 | |
5ff79300 PA |
2643 | /* Check whether this fileio_fh_t represents a closed file. */ |
2644 | bool is_closed () | |
2645 | { | |
2646 | return target_fd < 0; | |
2647 | } | |
2648 | }; | |
1c4b552b GB |
2649 | |
2650 | /* Vector of currently open file handles. The value returned by | |
2651 | target_fileio_open and passed as the FD argument to other | |
2652 | target_fileio_* functions is an index into this vector. This | |
2653 | vector's entries are never freed; instead, files are marked as | |
2654 | closed, and the handle becomes available for reuse. */ | |
5ff79300 | 2655 | static std::vector<fileio_fh_t> fileio_fhandles; |
1c4b552b GB |
2656 | |
2657 | /* Index into fileio_fhandles of the lowest handle that might be | |
2658 | closed. This permits handle reuse without searching the whole | |
2659 | list each time a new file is opened. */ | |
2660 | static int lowest_closed_fd; | |
2661 | ||
20db9c52 PA |
2662 | /* Invalidate the target associated with open handles that were open |
2663 | on target TARG, since we're about to close (and maybe destroy) the | |
2664 | target. The handles remain open from the client's perspective, but | |
2665 | trying to do anything with them other than closing them will fail | |
2666 | with EIO. */ | |
2667 | ||
2668 | static void | |
2669 | fileio_handles_invalidate_target (target_ops *targ) | |
2670 | { | |
2671 | for (fileio_fh_t &fh : fileio_fhandles) | |
2672 | if (fh.target == targ) | |
2673 | fh.target = NULL; | |
2674 | } | |
2675 | ||
1c4b552b GB |
2676 | /* Acquire a target fileio file descriptor. */ |
2677 | ||
2678 | static int | |
5ff79300 | 2679 | acquire_fileio_fd (target_ops *target, int target_fd) |
1c4b552b | 2680 | { |
1c4b552b | 2681 | /* Search for closed handles to reuse. */ |
5ff79300 PA |
2682 | for (; lowest_closed_fd < fileio_fhandles.size (); lowest_closed_fd++) |
2683 | { | |
2684 | fileio_fh_t &fh = fileio_fhandles[lowest_closed_fd]; | |
2685 | ||
2686 | if (fh.is_closed ()) | |
2687 | break; | |
2688 | } | |
1c4b552b GB |
2689 | |
2690 | /* Push a new handle if no closed handles were found. */ | |
5ff79300 PA |
2691 | if (lowest_closed_fd == fileio_fhandles.size ()) |
2692 | fileio_fhandles.push_back (fileio_fh_t {target, target_fd}); | |
2693 | else | |
2694 | fileio_fhandles[lowest_closed_fd] = {target, target_fd}; | |
1c4b552b | 2695 | |
5ff79300 PA |
2696 | /* Should no longer be marked closed. */ |
2697 | gdb_assert (!fileio_fhandles[lowest_closed_fd].is_closed ()); | |
1c4b552b GB |
2698 | |
2699 | /* Return its index, and start the next lookup at | |
2700 | the next index. */ | |
2701 | return lowest_closed_fd++; | |
2702 | } | |
2703 | ||
2704 | /* Release a target fileio file descriptor. */ | |
2705 | ||
2706 | static void | |
2707 | release_fileio_fd (int fd, fileio_fh_t *fh) | |
2708 | { | |
5ff79300 | 2709 | fh->target_fd = -1; |
325fac50 | 2710 | lowest_closed_fd = std::min (lowest_closed_fd, fd); |
1c4b552b GB |
2711 | } |
2712 | ||
2713 | /* Return a pointer to the fileio_fhandle_t corresponding to FD. */ | |
2714 | ||
5ff79300 PA |
2715 | static fileio_fh_t * |
2716 | fileio_fd_to_fh (int fd) | |
2717 | { | |
2718 | return &fileio_fhandles[fd]; | |
2719 | } | |
1c4b552b | 2720 | |
f6ac5f3d PA |
2721 | |
2722 | /* Default implementations of file i/o methods. We don't want these | |
2723 | to delegate automatically, because we need to know which target | |
2724 | supported the method, in order to call it directly from within | |
2725 | pread/pwrite, etc. */ | |
2726 | ||
2727 | int | |
2728 | target_ops::fileio_open (struct inferior *inf, const char *filename, | |
2729 | int flags, int mode, int warn_if_slow, | |
2730 | int *target_errno) | |
2731 | { | |
2732 | *target_errno = FILEIO_ENOSYS; | |
2733 | return -1; | |
2734 | } | |
2735 | ||
2736 | int | |
2737 | target_ops::fileio_pwrite (int fd, const gdb_byte *write_buf, int len, | |
2738 | ULONGEST offset, int *target_errno) | |
2739 | { | |
2740 | *target_errno = FILEIO_ENOSYS; | |
2741 | return -1; | |
2742 | } | |
2743 | ||
2744 | int | |
2745 | target_ops::fileio_pread (int fd, gdb_byte *read_buf, int len, | |
2746 | ULONGEST offset, int *target_errno) | |
2747 | { | |
2748 | *target_errno = FILEIO_ENOSYS; | |
2749 | return -1; | |
2750 | } | |
2751 | ||
2752 | int | |
2753 | target_ops::fileio_fstat (int fd, struct stat *sb, int *target_errno) | |
2754 | { | |
2755 | *target_errno = FILEIO_ENOSYS; | |
2756 | return -1; | |
2757 | } | |
2758 | ||
2759 | int | |
2760 | target_ops::fileio_close (int fd, int *target_errno) | |
2761 | { | |
2762 | *target_errno = FILEIO_ENOSYS; | |
2763 | return -1; | |
2764 | } | |
2765 | ||
2766 | int | |
2767 | target_ops::fileio_unlink (struct inferior *inf, const char *filename, | |
2768 | int *target_errno) | |
2769 | { | |
2770 | *target_errno = FILEIO_ENOSYS; | |
2771 | return -1; | |
2772 | } | |
2773 | ||
2774 | gdb::optional<std::string> | |
2775 | target_ops::fileio_readlink (struct inferior *inf, const char *filename, | |
2776 | int *target_errno) | |
2777 | { | |
2778 | *target_errno = FILEIO_ENOSYS; | |
2779 | return {}; | |
2780 | } | |
2781 | ||
4313b8c0 GB |
2782 | /* Helper for target_fileio_open and |
2783 | target_fileio_open_warn_if_slow. */ | |
12e2a5fd | 2784 | |
4313b8c0 GB |
2785 | static int |
2786 | target_fileio_open_1 (struct inferior *inf, const char *filename, | |
2787 | int flags, int mode, int warn_if_slow, | |
2788 | int *target_errno) | |
7313baad | 2789 | { |
b6a8c27b | 2790 | for (target_ops *t = default_fileio_target (); t != NULL; t = t->beneath ()) |
7313baad | 2791 | { |
f6ac5f3d PA |
2792 | int fd = t->fileio_open (inf, filename, flags, mode, |
2793 | warn_if_slow, target_errno); | |
7313baad | 2794 | |
f6ac5f3d PA |
2795 | if (fd == -1 && *target_errno == FILEIO_ENOSYS) |
2796 | continue; | |
1c4b552b | 2797 | |
f6ac5f3d PA |
2798 | if (fd < 0) |
2799 | fd = -1; | |
2800 | else | |
2801 | fd = acquire_fileio_fd (t, fd); | |
2802 | ||
2803 | if (targetdebug) | |
2804 | fprintf_unfiltered (gdb_stdlog, | |
4313b8c0 | 2805 | "target_fileio_open (%d,%s,0x%x,0%o,%d)" |
07c138c8 GB |
2806 | " = %d (%d)\n", |
2807 | inf == NULL ? 0 : inf->num, | |
7313baad | 2808 | filename, flags, mode, |
4313b8c0 GB |
2809 | warn_if_slow, fd, |
2810 | fd != -1 ? 0 : *target_errno); | |
f6ac5f3d | 2811 | return fd; |
7313baad UW |
2812 | } |
2813 | ||
2814 | *target_errno = FILEIO_ENOSYS; | |
2815 | return -1; | |
2816 | } | |
2817 | ||
12e2a5fd GB |
2818 | /* See target.h. */ |
2819 | ||
4313b8c0 GB |
2820 | int |
2821 | target_fileio_open (struct inferior *inf, const char *filename, | |
2822 | int flags, int mode, int *target_errno) | |
2823 | { | |
2824 | return target_fileio_open_1 (inf, filename, flags, mode, 0, | |
2825 | target_errno); | |
2826 | } | |
2827 | ||
2828 | /* See target.h. */ | |
2829 | ||
2830 | int | |
2831 | target_fileio_open_warn_if_slow (struct inferior *inf, | |
2832 | const char *filename, | |
2833 | int flags, int mode, int *target_errno) | |
2834 | { | |
2835 | return target_fileio_open_1 (inf, filename, flags, mode, 1, | |
2836 | target_errno); | |
2837 | } | |
2838 | ||
2839 | /* See target.h. */ | |
2840 | ||
7313baad UW |
2841 | int |
2842 | target_fileio_pwrite (int fd, const gdb_byte *write_buf, int len, | |
2843 | ULONGEST offset, int *target_errno) | |
2844 | { | |
1c4b552b GB |
2845 | fileio_fh_t *fh = fileio_fd_to_fh (fd); |
2846 | int ret = -1; | |
7313baad | 2847 | |
5ff79300 | 2848 | if (fh->is_closed ()) |
1c4b552b | 2849 | *target_errno = EBADF; |
20db9c52 PA |
2850 | else if (fh->target == NULL) |
2851 | *target_errno = EIO; | |
1c4b552b | 2852 | else |
f6ac5f3d PA |
2853 | ret = fh->target->fileio_pwrite (fh->target_fd, write_buf, |
2854 | len, offset, target_errno); | |
7313baad | 2855 | |
1c4b552b GB |
2856 | if (targetdebug) |
2857 | fprintf_unfiltered (gdb_stdlog, | |
2858 | "target_fileio_pwrite (%d,...,%d,%s) " | |
2859 | "= %d (%d)\n", | |
2860 | fd, len, pulongest (offset), | |
2861 | ret, ret != -1 ? 0 : *target_errno); | |
2862 | return ret; | |
7313baad UW |
2863 | } |
2864 | ||
12e2a5fd GB |
2865 | /* See target.h. */ |
2866 | ||
7313baad UW |
2867 | int |
2868 | target_fileio_pread (int fd, gdb_byte *read_buf, int len, | |
2869 | ULONGEST offset, int *target_errno) | |
2870 | { | |
1c4b552b GB |
2871 | fileio_fh_t *fh = fileio_fd_to_fh (fd); |
2872 | int ret = -1; | |
7313baad | 2873 | |
5ff79300 | 2874 | if (fh->is_closed ()) |
1c4b552b | 2875 | *target_errno = EBADF; |
20db9c52 PA |
2876 | else if (fh->target == NULL) |
2877 | *target_errno = EIO; | |
1c4b552b | 2878 | else |
f6ac5f3d PA |
2879 | ret = fh->target->fileio_pread (fh->target_fd, read_buf, |
2880 | len, offset, target_errno); | |
7313baad | 2881 | |
1c4b552b GB |
2882 | if (targetdebug) |
2883 | fprintf_unfiltered (gdb_stdlog, | |
2884 | "target_fileio_pread (%d,...,%d,%s) " | |
2885 | "= %d (%d)\n", | |
2886 | fd, len, pulongest (offset), | |
2887 | ret, ret != -1 ? 0 : *target_errno); | |
9b15c1f0 GB |
2888 | return ret; |
2889 | } | |
2890 | ||
2891 | /* See target.h. */ | |
12e2a5fd | 2892 | |
9b15c1f0 GB |
2893 | int |
2894 | target_fileio_fstat (int fd, struct stat *sb, int *target_errno) | |
2895 | { | |
2896 | fileio_fh_t *fh = fileio_fd_to_fh (fd); | |
2897 | int ret = -1; | |
2898 | ||
5ff79300 | 2899 | if (fh->is_closed ()) |
9b15c1f0 | 2900 | *target_errno = EBADF; |
20db9c52 PA |
2901 | else if (fh->target == NULL) |
2902 | *target_errno = EIO; | |
9b15c1f0 | 2903 | else |
f6ac5f3d | 2904 | ret = fh->target->fileio_fstat (fh->target_fd, sb, target_errno); |
9b15c1f0 GB |
2905 | |
2906 | if (targetdebug) | |
2907 | fprintf_unfiltered (gdb_stdlog, | |
2908 | "target_fileio_fstat (%d) = %d (%d)\n", | |
2909 | fd, ret, ret != -1 ? 0 : *target_errno); | |
1c4b552b | 2910 | return ret; |
7313baad UW |
2911 | } |
2912 | ||
12e2a5fd GB |
2913 | /* See target.h. */ |
2914 | ||
7313baad UW |
2915 | int |
2916 | target_fileio_close (int fd, int *target_errno) | |
2917 | { | |
1c4b552b GB |
2918 | fileio_fh_t *fh = fileio_fd_to_fh (fd); |
2919 | int ret = -1; | |
7313baad | 2920 | |
5ff79300 | 2921 | if (fh->is_closed ()) |
1c4b552b GB |
2922 | *target_errno = EBADF; |
2923 | else | |
7313baad | 2924 | { |
20db9c52 | 2925 | if (fh->target != NULL) |
f6ac5f3d PA |
2926 | ret = fh->target->fileio_close (fh->target_fd, |
2927 | target_errno); | |
20db9c52 PA |
2928 | else |
2929 | ret = 0; | |
1c4b552b | 2930 | release_fileio_fd (fd, fh); |
7313baad UW |
2931 | } |
2932 | ||
1c4b552b GB |
2933 | if (targetdebug) |
2934 | fprintf_unfiltered (gdb_stdlog, | |
2935 | "target_fileio_close (%d) = %d (%d)\n", | |
2936 | fd, ret, ret != -1 ? 0 : *target_errno); | |
2937 | return ret; | |
7313baad UW |
2938 | } |
2939 | ||
12e2a5fd GB |
2940 | /* See target.h. */ |
2941 | ||
7313baad | 2942 | int |
07c138c8 GB |
2943 | target_fileio_unlink (struct inferior *inf, const char *filename, |
2944 | int *target_errno) | |
7313baad | 2945 | { |
b6a8c27b | 2946 | for (target_ops *t = default_fileio_target (); t != NULL; t = t->beneath ()) |
7313baad | 2947 | { |
f6ac5f3d | 2948 | int ret = t->fileio_unlink (inf, filename, target_errno); |
7313baad | 2949 | |
f6ac5f3d PA |
2950 | if (ret == -1 && *target_errno == FILEIO_ENOSYS) |
2951 | continue; | |
2952 | ||
2953 | if (targetdebug) | |
2954 | fprintf_unfiltered (gdb_stdlog, | |
2955 | "target_fileio_unlink (%d,%s)" | |
2956 | " = %d (%d)\n", | |
2957 | inf == NULL ? 0 : inf->num, filename, | |
2958 | ret, ret != -1 ? 0 : *target_errno); | |
2959 | return ret; | |
7313baad UW |
2960 | } |
2961 | ||
2962 | *target_errno = FILEIO_ENOSYS; | |
2963 | return -1; | |
2964 | } | |
2965 | ||
12e2a5fd GB |
2966 | /* See target.h. */ |
2967 | ||
e0d3522b | 2968 | gdb::optional<std::string> |
07c138c8 GB |
2969 | target_fileio_readlink (struct inferior *inf, const char *filename, |
2970 | int *target_errno) | |
b9e7b9c3 | 2971 | { |
b6a8c27b | 2972 | for (target_ops *t = default_fileio_target (); t != NULL; t = t->beneath ()) |
b9e7b9c3 | 2973 | { |
f6ac5f3d PA |
2974 | gdb::optional<std::string> ret |
2975 | = t->fileio_readlink (inf, filename, target_errno); | |
b9e7b9c3 | 2976 | |
f6ac5f3d PA |
2977 | if (!ret.has_value () && *target_errno == FILEIO_ENOSYS) |
2978 | continue; | |
2979 | ||
2980 | if (targetdebug) | |
2981 | fprintf_unfiltered (gdb_stdlog, | |
2982 | "target_fileio_readlink (%d,%s)" | |
2983 | " = %s (%d)\n", | |
2984 | inf == NULL ? 0 : inf->num, | |
2985 | filename, ret ? ret->c_str () : "(nil)", | |
2986 | ret ? 0 : *target_errno); | |
2987 | return ret; | |
b9e7b9c3 UW |
2988 | } |
2989 | ||
2990 | *target_errno = FILEIO_ENOSYS; | |
e0d3522b | 2991 | return {}; |
b9e7b9c3 UW |
2992 | } |
2993 | ||
770623f7 TT |
2994 | /* Like scoped_fd, but specific to target fileio. */ |
2995 | ||
2996 | class scoped_target_fd | |
7313baad | 2997 | { |
770623f7 TT |
2998 | public: |
2999 | explicit scoped_target_fd (int fd) noexcept | |
3000 | : m_fd (fd) | |
3001 | { | |
3002 | } | |
7313baad | 3003 | |
770623f7 TT |
3004 | ~scoped_target_fd () |
3005 | { | |
3006 | if (m_fd >= 0) | |
3007 | { | |
3008 | int target_errno; | |
3009 | ||
3010 | target_fileio_close (m_fd, &target_errno); | |
3011 | } | |
3012 | } | |
3013 | ||
3014 | DISABLE_COPY_AND_ASSIGN (scoped_target_fd); | |
3015 | ||
3016 | int get () const noexcept | |
3017 | { | |
3018 | return m_fd; | |
3019 | } | |
3020 | ||
3021 | private: | |
3022 | int m_fd; | |
3023 | }; | |
7313baad | 3024 | |
07c138c8 GB |
3025 | /* Read target file FILENAME, in the filesystem as seen by INF. If |
3026 | INF is NULL, use the filesystem seen by the debugger (GDB or, for | |
3027 | remote targets, the remote stub). Store the result in *BUF_P and | |
3028 | return the size of the transferred data. PADDING additional bytes | |
3029 | are available in *BUF_P. This is a helper function for | |
3030 | target_fileio_read_alloc; see the declaration of that function for | |
3031 | more information. */ | |
7313baad | 3032 | |
f7af1fcd JK |
3033 | static LONGEST |
3034 | target_fileio_read_alloc_1 (struct inferior *inf, const char *filename, | |
3035 | gdb_byte **buf_p, int padding) | |
3036 | { | |
db1ff28b JK |
3037 | size_t buf_alloc, buf_pos; |
3038 | gdb_byte *buf; | |
3039 | LONGEST n; | |
db1ff28b | 3040 | int target_errno; |
f7af1fcd | 3041 | |
770623f7 TT |
3042 | scoped_target_fd fd (target_fileio_open (inf, filename, FILEIO_O_RDONLY, |
3043 | 0700, &target_errno)); | |
3044 | if (fd.get () == -1) | |
f7af1fcd JK |
3045 | return -1; |
3046 | ||
db1ff28b JK |
3047 | /* Start by reading up to 4K at a time. The target will throttle |
3048 | this number down if necessary. */ | |
3049 | buf_alloc = 4096; | |
224c3ddb | 3050 | buf = (gdb_byte *) xmalloc (buf_alloc); |
db1ff28b JK |
3051 | buf_pos = 0; |
3052 | while (1) | |
3053 | { | |
770623f7 | 3054 | n = target_fileio_pread (fd.get (), &buf[buf_pos], |
db1ff28b JK |
3055 | buf_alloc - buf_pos - padding, buf_pos, |
3056 | &target_errno); | |
3057 | if (n < 0) | |
3058 | { | |
3059 | /* An error occurred. */ | |
db1ff28b JK |
3060 | xfree (buf); |
3061 | return -1; | |
3062 | } | |
3063 | else if (n == 0) | |
3064 | { | |
3065 | /* Read all there was. */ | |
db1ff28b JK |
3066 | if (buf_pos == 0) |
3067 | xfree (buf); | |
3068 | else | |
3069 | *buf_p = buf; | |
3070 | return buf_pos; | |
3071 | } | |
3072 | ||
3073 | buf_pos += n; | |
3074 | ||
3075 | /* If the buffer is filling up, expand it. */ | |
3076 | if (buf_alloc < buf_pos * 2) | |
3077 | { | |
3078 | buf_alloc *= 2; | |
224c3ddb | 3079 | buf = (gdb_byte *) xrealloc (buf, buf_alloc); |
db1ff28b JK |
3080 | } |
3081 | ||
3082 | QUIT; | |
3083 | } | |
f7af1fcd JK |
3084 | } |
3085 | ||
12e2a5fd | 3086 | /* See target.h. */ |
7313baad UW |
3087 | |
3088 | LONGEST | |
07c138c8 GB |
3089 | target_fileio_read_alloc (struct inferior *inf, const char *filename, |
3090 | gdb_byte **buf_p) | |
7313baad | 3091 | { |
07c138c8 | 3092 | return target_fileio_read_alloc_1 (inf, filename, buf_p, 0); |
7313baad UW |
3093 | } |
3094 | ||
db1ff28b | 3095 | /* See target.h. */ |
f7af1fcd | 3096 | |
87028b87 | 3097 | gdb::unique_xmalloc_ptr<char> |
f7af1fcd JK |
3098 | target_fileio_read_stralloc (struct inferior *inf, const char *filename) |
3099 | { | |
db1ff28b JK |
3100 | gdb_byte *buffer; |
3101 | char *bufstr; | |
3102 | LONGEST i, transferred; | |
3103 | ||
3104 | transferred = target_fileio_read_alloc_1 (inf, filename, &buffer, 1); | |
3105 | bufstr = (char *) buffer; | |
3106 | ||
3107 | if (transferred < 0) | |
87028b87 | 3108 | return gdb::unique_xmalloc_ptr<char> (nullptr); |
db1ff28b JK |
3109 | |
3110 | if (transferred == 0) | |
b02f78f9 | 3111 | return make_unique_xstrdup (""); |
db1ff28b JK |
3112 | |
3113 | bufstr[transferred] = 0; | |
3114 | ||
3115 | /* Check for embedded NUL bytes; but allow trailing NULs. */ | |
3116 | for (i = strlen (bufstr); i < transferred; i++) | |
3117 | if (bufstr[i] != 0) | |
3118 | { | |
3119 | warning (_("target file %s " | |
3120 | "contained unexpected null characters"), | |
3121 | filename); | |
3122 | break; | |
3123 | } | |
3124 | ||
87028b87 | 3125 | return gdb::unique_xmalloc_ptr<char> (bufstr); |
f7af1fcd | 3126 | } |
7313baad | 3127 | |
db1ff28b | 3128 | |
e0d24f8d | 3129 | static int |
31568a15 TT |
3130 | default_region_ok_for_hw_watchpoint (struct target_ops *self, |
3131 | CORE_ADDR addr, int len) | |
e0d24f8d | 3132 | { |
f5656ead | 3133 | return (len <= gdbarch_ptr_bit (target_gdbarch ()) / TARGET_CHAR_BIT); |
ccaa32c7 GS |
3134 | } |
3135 | ||
5009afc5 AS |
3136 | static int |
3137 | default_watchpoint_addr_within_range (struct target_ops *target, | |
3138 | CORE_ADDR addr, | |
3139 | CORE_ADDR start, int length) | |
3140 | { | |
3141 | return addr >= start && addr < start + length; | |
3142 | } | |
3143 | ||
8b06beed TT |
3144 | /* See target.h. */ |
3145 | ||
a1740ee1 PA |
3146 | target_ops * |
3147 | target_stack::find_beneath (const target_ops *t) const | |
8b06beed | 3148 | { |
a1740ee1 | 3149 | /* Look for a non-empty slot at stratum levels beneath T's. */ |
66b4deae | 3150 | for (int stratum = t->stratum () - 1; stratum >= 0; --stratum) |
a1740ee1 PA |
3151 | if (m_stack[stratum] != NULL) |
3152 | return m_stack[stratum]; | |
8b06beed TT |
3153 | |
3154 | return NULL; | |
3155 | } | |
3156 | ||
a1740ee1 PA |
3157 | /* See target.h. */ |
3158 | ||
3159 | struct target_ops * | |
3160 | find_target_at (enum strata stratum) | |
3161 | { | |
5b6d1e4f | 3162 | return current_inferior ()->target_at (stratum); |
a1740ee1 PA |
3163 | } |
3164 | ||
c906108c | 3165 | \f |
0f48b757 PA |
3166 | |
3167 | /* See target.h */ | |
3168 | ||
3169 | void | |
3170 | target_announce_detach (int from_tty) | |
3171 | { | |
3172 | pid_t pid; | |
a121b7c1 | 3173 | const char *exec_file; |
0f48b757 PA |
3174 | |
3175 | if (!from_tty) | |
3176 | return; | |
3177 | ||
3178 | exec_file = get_exec_file (0); | |
3179 | if (exec_file == NULL) | |
3180 | exec_file = ""; | |
3181 | ||
e99b03dc | 3182 | pid = inferior_ptid.pid (); |
0f48b757 | 3183 | printf_unfiltered (_("Detaching from program: %s, %s\n"), exec_file, |
a068643d | 3184 | target_pid_to_str (ptid_t (pid)).c_str ()); |
0f48b757 PA |
3185 | } |
3186 | ||
c906108c SS |
3187 | /* The inferior process has died. Long live the inferior! */ |
3188 | ||
3189 | void | |
fba45db2 | 3190 | generic_mourn_inferior (void) |
c906108c | 3191 | { |
00431a78 | 3192 | inferior *inf = current_inferior (); |
c906108c | 3193 | |
39f77062 | 3194 | inferior_ptid = null_ptid; |
7f9f62ba | 3195 | |
f59f708a PA |
3196 | /* Mark breakpoints uninserted in case something tries to delete a |
3197 | breakpoint while we delete the inferior's threads (which would | |
3198 | fail, since the inferior is long gone). */ | |
3199 | mark_breakpoints_out (); | |
3200 | ||
00431a78 PA |
3201 | if (inf->pid != 0) |
3202 | exit_inferior (inf); | |
7f9f62ba | 3203 | |
f59f708a PA |
3204 | /* Note this wipes step-resume breakpoints, so needs to be done |
3205 | after exit_inferior, which ends up referencing the step-resume | |
3206 | breakpoints through clear_thread_inferior_resources. */ | |
c906108c | 3207 | breakpoint_init_inferior (inf_exited); |
f59f708a | 3208 | |
c906108c SS |
3209 | registers_changed (); |
3210 | ||
c906108c SS |
3211 | reopen_exec_file (); |
3212 | reinit_frame_cache (); | |
3213 | ||
9a4105ab AC |
3214 | if (deprecated_detach_hook) |
3215 | deprecated_detach_hook (); | |
c906108c SS |
3216 | } |
3217 | \f | |
fd0a2a6f MK |
3218 | /* Convert a normal process ID to a string. Returns the string in a |
3219 | static buffer. */ | |
c906108c | 3220 | |
a068643d | 3221 | std::string |
39f77062 | 3222 | normal_pid_to_str (ptid_t ptid) |
c906108c | 3223 | { |
a068643d | 3224 | return string_printf ("process %d", ptid.pid ()); |
c906108c SS |
3225 | } |
3226 | ||
a068643d | 3227 | static std::string |
770234d3 | 3228 | default_pid_to_str (struct target_ops *ops, ptid_t ptid) |
117de6a9 PA |
3229 | { |
3230 | return normal_pid_to_str (ptid); | |
3231 | } | |
3232 | ||
9b4eba8e HZ |
3233 | /* Error-catcher for target_find_memory_regions. */ |
3234 | static int | |
2e73927c TT |
3235 | dummy_find_memory_regions (struct target_ops *self, |
3236 | find_memory_region_ftype ignore1, void *ignore2) | |
be4d1333 | 3237 | { |
9b4eba8e | 3238 | error (_("Command not implemented for this target.")); |
be4d1333 MS |
3239 | return 0; |
3240 | } | |
3241 | ||
9b4eba8e HZ |
3242 | /* Error-catcher for target_make_corefile_notes. */ |
3243 | static char * | |
fc6691b2 TT |
3244 | dummy_make_corefile_notes (struct target_ops *self, |
3245 | bfd *ignore1, int *ignore2) | |
be4d1333 | 3246 | { |
9b4eba8e | 3247 | error (_("Command not implemented for this target.")); |
be4d1333 MS |
3248 | return NULL; |
3249 | } | |
3250 | ||
f6ac5f3d PA |
3251 | #include "target-delegates.c" |
3252 | ||
06b5b831 TT |
3253 | /* The initial current target, so that there is always a semi-valid |
3254 | current target. */ | |
3255 | ||
3256 | static dummy_target the_dummy_target; | |
c906108c | 3257 | |
5b6d1e4f PA |
3258 | /* See target.h. */ |
3259 | ||
3260 | target_ops * | |
3261 | get_dummy_target () | |
3262 | { | |
3263 | return &the_dummy_target; | |
3264 | } | |
3265 | ||
d9f719f1 PA |
3266 | static const target_info dummy_target_info = { |
3267 | "None", | |
3268 | N_("None"), | |
3269 | "" | |
3270 | }; | |
3271 | ||
66b4deae PA |
3272 | strata |
3273 | dummy_target::stratum () const | |
f6ac5f3d | 3274 | { |
66b4deae | 3275 | return dummy_stratum; |
f6ac5f3d PA |
3276 | } |
3277 | ||
66b4deae PA |
3278 | strata |
3279 | debug_target::stratum () const | |
f6ac5f3d | 3280 | { |
66b4deae | 3281 | return debug_stratum; |
f6ac5f3d PA |
3282 | } |
3283 | ||
d9f719f1 PA |
3284 | const target_info & |
3285 | dummy_target::info () const | |
f6ac5f3d | 3286 | { |
d9f719f1 | 3287 | return dummy_target_info; |
f6ac5f3d PA |
3288 | } |
3289 | ||
d9f719f1 PA |
3290 | const target_info & |
3291 | debug_target::info () const | |
f6ac5f3d | 3292 | { |
b6a8c27b | 3293 | return beneath ()->info (); |
f6ac5f3d PA |
3294 | } |
3295 | ||
c906108c | 3296 | \f |
c906108c | 3297 | |
f1c07ab0 | 3298 | void |
460014f5 | 3299 | target_close (struct target_ops *targ) |
f1c07ab0 | 3300 | { |
7fdc1521 TT |
3301 | gdb_assert (!target_is_pushed (targ)); |
3302 | ||
20db9c52 PA |
3303 | fileio_handles_invalidate_target (targ); |
3304 | ||
f6ac5f3d | 3305 | targ->close (); |
947b8855 PA |
3306 | |
3307 | if (targetdebug) | |
460014f5 | 3308 | fprintf_unfiltered (gdb_stdlog, "target_close ()\n"); |
f1c07ab0 AC |
3309 | } |
3310 | ||
28439f5e PA |
3311 | int |
3312 | target_thread_alive (ptid_t ptid) | |
c906108c | 3313 | { |
8b88a78e | 3314 | return current_top_target ()->thread_alive (ptid); |
28439f5e PA |
3315 | } |
3316 | ||
3317 | void | |
e8032dde | 3318 | target_update_thread_list (void) |
28439f5e | 3319 | { |
8b88a78e | 3320 | current_top_target ()->update_thread_list (); |
c906108c SS |
3321 | } |
3322 | ||
d914c394 SS |
3323 | void |
3324 | target_stop (ptid_t ptid) | |
3325 | { | |
3326 | if (!may_stop) | |
3327 | { | |
3328 | warning (_("May not interrupt or stop the target, ignoring attempt")); | |
3329 | return; | |
3330 | } | |
3331 | ||
8b88a78e | 3332 | current_top_target ()->stop (ptid); |
d914c394 SS |
3333 | } |
3334 | ||
bfedc46a | 3335 | void |
e671cd59 | 3336 | target_interrupt () |
bfedc46a PA |
3337 | { |
3338 | if (!may_stop) | |
3339 | { | |
3340 | warning (_("May not interrupt or stop the target, ignoring attempt")); | |
3341 | return; | |
3342 | } | |
3343 | ||
8b88a78e | 3344 | current_top_target ()->interrupt (); |
bfedc46a PA |
3345 | } |
3346 | ||
abc56d60 PA |
3347 | /* See target.h. */ |
3348 | ||
93692b58 PA |
3349 | void |
3350 | target_pass_ctrlc (void) | |
3351 | { | |
5b6d1e4f PA |
3352 | /* Pass the Ctrl-C to the first target that has a thread |
3353 | running. */ | |
3354 | for (inferior *inf : all_inferiors ()) | |
3355 | { | |
3356 | target_ops *proc_target = inf->process_target (); | |
3357 | if (proc_target == NULL) | |
3358 | continue; | |
3359 | ||
3360 | for (thread_info *thr : inf->threads ()) | |
3361 | { | |
3362 | /* A thread can be THREAD_STOPPED and executing, while | |
3363 | running an infcall. */ | |
3364 | if (thr->state == THREAD_RUNNING || thr->executing) | |
3365 | { | |
3366 | /* We can get here quite deep in target layers. Avoid | |
3367 | switching thread context or anything that would | |
3368 | communicate with the target (e.g., to fetch | |
3369 | registers), or flushing e.g., the frame cache. We | |
3370 | just switch inferior in order to be able to call | |
3371 | through the target_stack. */ | |
3372 | scoped_restore_current_inferior restore_inferior; | |
3373 | set_current_inferior (inf); | |
3374 | current_top_target ()->pass_ctrlc (); | |
3375 | return; | |
3376 | } | |
3377 | } | |
3378 | } | |
93692b58 PA |
3379 | } |
3380 | ||
3381 | /* See target.h. */ | |
3382 | ||
3383 | void | |
3384 | default_target_pass_ctrlc (struct target_ops *ops) | |
3385 | { | |
e671cd59 | 3386 | target_interrupt (); |
93692b58 PA |
3387 | } |
3388 | ||
f8c1d06b GB |
3389 | /* See target/target.h. */ |
3390 | ||
3391 | void | |
03f4463b | 3392 | target_stop_and_wait (ptid_t ptid) |
f8c1d06b GB |
3393 | { |
3394 | struct target_waitstatus status; | |
491144b5 | 3395 | bool was_non_stop = non_stop; |
f8c1d06b | 3396 | |
491144b5 | 3397 | non_stop = true; |
f8c1d06b GB |
3398 | target_stop (ptid); |
3399 | ||
3400 | memset (&status, 0, sizeof (status)); | |
3401 | target_wait (ptid, &status, 0); | |
3402 | ||
3403 | non_stop = was_non_stop; | |
3404 | } | |
3405 | ||
3406 | /* See target/target.h. */ | |
3407 | ||
3408 | void | |
03f4463b | 3409 | target_continue_no_signal (ptid_t ptid) |
f8c1d06b GB |
3410 | { |
3411 | target_resume (ptid, 0, GDB_SIGNAL_0); | |
3412 | } | |
3413 | ||
049a8570 SDJ |
3414 | /* See target/target.h. */ |
3415 | ||
3416 | void | |
3417 | target_continue (ptid_t ptid, enum gdb_signal signal) | |
3418 | { | |
3419 | target_resume (ptid, 0, signal); | |
3420 | } | |
3421 | ||
fdbac7d8 | 3422 | /* Concatenate ELEM to LIST, a comma-separated list. */ |
09826ec5 | 3423 | |
09ce46f2 SM |
3424 | static void |
3425 | str_comma_list_concat_elem (std::string *list, const char *elem) | |
09826ec5 | 3426 | { |
09ce46f2 SM |
3427 | if (!list->empty ()) |
3428 | list->append (", "); | |
3429 | ||
3430 | list->append (elem); | |
09826ec5 PA |
3431 | } |
3432 | ||
3433 | /* Helper for target_options_to_string. If OPT is present in | |
3434 | TARGET_OPTIONS, append the OPT_STR (string version of OPT) in RET. | |
09ce46f2 | 3435 | OPT is removed from TARGET_OPTIONS. */ |
09826ec5 | 3436 | |
09ce46f2 SM |
3437 | static void |
3438 | do_option (int *target_options, std::string *ret, | |
a121b7c1 | 3439 | int opt, const char *opt_str) |
09826ec5 PA |
3440 | { |
3441 | if ((*target_options & opt) != 0) | |
3442 | { | |
09ce46f2 | 3443 | str_comma_list_concat_elem (ret, opt_str); |
09826ec5 PA |
3444 | *target_options &= ~opt; |
3445 | } | |
09826ec5 PA |
3446 | } |
3447 | ||
fdbac7d8 SM |
3448 | /* See target.h. */ |
3449 | ||
09ce46f2 | 3450 | std::string |
09826ec5 PA |
3451 | target_options_to_string (int target_options) |
3452 | { | |
09ce46f2 | 3453 | std::string ret; |
09826ec5 PA |
3454 | |
3455 | #define DO_TARG_OPTION(OPT) \ | |
09ce46f2 | 3456 | do_option (&target_options, &ret, OPT, #OPT) |
09826ec5 PA |
3457 | |
3458 | DO_TARG_OPTION (TARGET_WNOHANG); | |
3459 | ||
3460 | if (target_options != 0) | |
09ce46f2 | 3461 | str_comma_list_concat_elem (&ret, "unknown???"); |
09826ec5 | 3462 | |
09826ec5 PA |
3463 | return ret; |
3464 | } | |
3465 | ||
28439f5e PA |
3466 | void |
3467 | target_fetch_registers (struct regcache *regcache, int regno) | |
c906108c | 3468 | { |
8b88a78e | 3469 | current_top_target ()->fetch_registers (regcache, regno); |
ad5989bd | 3470 | if (targetdebug) |
ef79d9a3 | 3471 | regcache->debug_print_register ("target_fetch_registers", regno); |
c906108c SS |
3472 | } |
3473 | ||
28439f5e PA |
3474 | void |
3475 | target_store_registers (struct regcache *regcache, int regno) | |
c906108c | 3476 | { |
d914c394 SS |
3477 | if (!may_write_registers) |
3478 | error (_("Writing to registers is not allowed (regno %d)"), regno); | |
3479 | ||
8b88a78e | 3480 | current_top_target ()->store_registers (regcache, regno); |
6b84065d | 3481 | if (targetdebug) |
28439f5e | 3482 | { |
ef79d9a3 | 3483 | regcache->debug_print_register ("target_store_registers", regno); |
28439f5e | 3484 | } |
c906108c SS |
3485 | } |
3486 | ||
dc146f7c VP |
3487 | int |
3488 | target_core_of_thread (ptid_t ptid) | |
3489 | { | |
8b88a78e | 3490 | return current_top_target ()->core_of_thread (ptid); |
dc146f7c VP |
3491 | } |
3492 | ||
936d2992 PA |
3493 | int |
3494 | simple_verify_memory (struct target_ops *ops, | |
3495 | const gdb_byte *data, CORE_ADDR lma, ULONGEST size) | |
3496 | { | |
3497 | LONGEST total_xfered = 0; | |
3498 | ||
3499 | while (total_xfered < size) | |
3500 | { | |
3501 | ULONGEST xfered_len; | |
3502 | enum target_xfer_status status; | |
3503 | gdb_byte buf[1024]; | |
768adc05 | 3504 | ULONGEST howmuch = std::min<ULONGEST> (sizeof (buf), size - total_xfered); |
936d2992 PA |
3505 | |
3506 | status = target_xfer_partial (ops, TARGET_OBJECT_MEMORY, NULL, | |
3507 | buf, NULL, lma + total_xfered, howmuch, | |
3508 | &xfered_len); | |
3509 | if (status == TARGET_XFER_OK | |
3510 | && memcmp (data + total_xfered, buf, xfered_len) == 0) | |
3511 | { | |
3512 | total_xfered += xfered_len; | |
3513 | QUIT; | |
3514 | } | |
3515 | else | |
3516 | return 0; | |
3517 | } | |
3518 | return 1; | |
3519 | } | |
3520 | ||
3521 | /* Default implementation of memory verification. */ | |
3522 | ||
3523 | static int | |
3524 | default_verify_memory (struct target_ops *self, | |
3525 | const gdb_byte *data, CORE_ADDR memaddr, ULONGEST size) | |
3526 | { | |
3527 | /* Start over from the top of the target stack. */ | |
8b88a78e | 3528 | return simple_verify_memory (current_top_target (), |
936d2992 PA |
3529 | data, memaddr, size); |
3530 | } | |
3531 | ||
4a5e7a5b PA |
3532 | int |
3533 | target_verify_memory (const gdb_byte *data, CORE_ADDR memaddr, ULONGEST size) | |
3534 | { | |
8b88a78e | 3535 | return current_top_target ()->verify_memory (data, memaddr, size); |
4a5e7a5b PA |
3536 | } |
3537 | ||
9c06b0b4 TJB |
3538 | /* The documentation for this function is in its prototype declaration in |
3539 | target.h. */ | |
3540 | ||
3541 | int | |
f4b0a671 SM |
3542 | target_insert_mask_watchpoint (CORE_ADDR addr, CORE_ADDR mask, |
3543 | enum target_hw_bp_type rw) | |
9c06b0b4 | 3544 | { |
8b88a78e | 3545 | return current_top_target ()->insert_mask_watchpoint (addr, mask, rw); |
9c06b0b4 TJB |
3546 | } |
3547 | ||
3548 | /* The documentation for this function is in its prototype declaration in | |
3549 | target.h. */ | |
3550 | ||
3551 | int | |
f4b0a671 SM |
3552 | target_remove_mask_watchpoint (CORE_ADDR addr, CORE_ADDR mask, |
3553 | enum target_hw_bp_type rw) | |
9c06b0b4 | 3554 | { |
8b88a78e | 3555 | return current_top_target ()->remove_mask_watchpoint (addr, mask, rw); |
9c06b0b4 TJB |
3556 | } |
3557 | ||
3558 | /* The documentation for this function is in its prototype declaration | |
3559 | in target.h. */ | |
3560 | ||
3561 | int | |
3562 | target_masked_watch_num_registers (CORE_ADDR addr, CORE_ADDR mask) | |
3563 | { | |
8b88a78e | 3564 | return current_top_target ()->masked_watch_num_registers (addr, mask); |
9c06b0b4 TJB |
3565 | } |
3566 | ||
f1310107 TJB |
3567 | /* The documentation for this function is in its prototype declaration |
3568 | in target.h. */ | |
3569 | ||
3570 | int | |
3571 | target_ranged_break_num_registers (void) | |
3572 | { | |
8b88a78e | 3573 | return current_top_target ()->ranged_break_num_registers (); |
f1310107 TJB |
3574 | } |
3575 | ||
02d27625 MM |
3576 | /* See target.h. */ |
3577 | ||
02d27625 | 3578 | struct btrace_target_info * |
f4abbc16 | 3579 | target_enable_btrace (ptid_t ptid, const struct btrace_config *conf) |
02d27625 | 3580 | { |
8b88a78e | 3581 | return current_top_target ()->enable_btrace (ptid, conf); |
02d27625 MM |
3582 | } |
3583 | ||
3584 | /* See target.h. */ | |
3585 | ||
3586 | void | |
3587 | target_disable_btrace (struct btrace_target_info *btinfo) | |
3588 | { | |
8b88a78e | 3589 | current_top_target ()->disable_btrace (btinfo); |
02d27625 MM |
3590 | } |
3591 | ||
3592 | /* See target.h. */ | |
3593 | ||
3594 | void | |
3595 | target_teardown_btrace (struct btrace_target_info *btinfo) | |
3596 | { | |
8b88a78e | 3597 | current_top_target ()->teardown_btrace (btinfo); |
02d27625 MM |
3598 | } |
3599 | ||
3600 | /* See target.h. */ | |
3601 | ||
969c39fb | 3602 | enum btrace_error |
734b0e4b | 3603 | target_read_btrace (struct btrace_data *btrace, |
969c39fb | 3604 | struct btrace_target_info *btinfo, |
02d27625 MM |
3605 | enum btrace_read_type type) |
3606 | { | |
8b88a78e | 3607 | return current_top_target ()->read_btrace (btrace, btinfo, type); |
02d27625 MM |
3608 | } |
3609 | ||
d02ed0bb MM |
3610 | /* See target.h. */ |
3611 | ||
f4abbc16 MM |
3612 | const struct btrace_config * |
3613 | target_btrace_conf (const struct btrace_target_info *btinfo) | |
3614 | { | |
8b88a78e | 3615 | return current_top_target ()->btrace_conf (btinfo); |
f4abbc16 MM |
3616 | } |
3617 | ||
3618 | /* See target.h. */ | |
3619 | ||
7c1687a9 MM |
3620 | void |
3621 | target_stop_recording (void) | |
3622 | { | |
8b88a78e | 3623 | current_top_target ()->stop_recording (); |
7c1687a9 MM |
3624 | } |
3625 | ||
3626 | /* See target.h. */ | |
3627 | ||
d02ed0bb | 3628 | void |
85e1311a | 3629 | target_save_record (const char *filename) |
d02ed0bb | 3630 | { |
8b88a78e | 3631 | current_top_target ()->save_record (filename); |
d02ed0bb MM |
3632 | } |
3633 | ||
3634 | /* See target.h. */ | |
3635 | ||
3636 | int | |
f6ac5f3d | 3637 | target_supports_delete_record () |
d02ed0bb | 3638 | { |
8b88a78e | 3639 | return current_top_target ()->supports_delete_record (); |
d02ed0bb MM |
3640 | } |
3641 | ||
3642 | /* See target.h. */ | |
3643 | ||
3644 | void | |
3645 | target_delete_record (void) | |
3646 | { | |
8b88a78e | 3647 | current_top_target ()->delete_record (); |
d02ed0bb MM |
3648 | } |
3649 | ||
3650 | /* See target.h. */ | |
3651 | ||
b158a20f TW |
3652 | enum record_method |
3653 | target_record_method (ptid_t ptid) | |
3654 | { | |
8b88a78e | 3655 | return current_top_target ()->record_method (ptid); |
b158a20f TW |
3656 | } |
3657 | ||
3658 | /* See target.h. */ | |
3659 | ||
d02ed0bb | 3660 | int |
a52eab48 | 3661 | target_record_is_replaying (ptid_t ptid) |
d02ed0bb | 3662 | { |
8b88a78e | 3663 | return current_top_target ()->record_is_replaying (ptid); |
d02ed0bb MM |
3664 | } |
3665 | ||
3666 | /* See target.h. */ | |
3667 | ||
7ff27e9b MM |
3668 | int |
3669 | target_record_will_replay (ptid_t ptid, int dir) | |
3670 | { | |
8b88a78e | 3671 | return current_top_target ()->record_will_replay (ptid, dir); |
7ff27e9b MM |
3672 | } |
3673 | ||
3674 | /* See target.h. */ | |
3675 | ||
797094dd MM |
3676 | void |
3677 | target_record_stop_replaying (void) | |
3678 | { | |
8b88a78e | 3679 | current_top_target ()->record_stop_replaying (); |
797094dd MM |
3680 | } |
3681 | ||
3682 | /* See target.h. */ | |
3683 | ||
d02ed0bb MM |
3684 | void |
3685 | target_goto_record_begin (void) | |
3686 | { | |
8b88a78e | 3687 | current_top_target ()->goto_record_begin (); |
d02ed0bb MM |
3688 | } |
3689 | ||
3690 | /* See target.h. */ | |
3691 | ||
3692 | void | |
3693 | target_goto_record_end (void) | |
3694 | { | |
8b88a78e | 3695 | current_top_target ()->goto_record_end (); |
d02ed0bb MM |
3696 | } |
3697 | ||
3698 | /* See target.h. */ | |
3699 | ||
3700 | void | |
3701 | target_goto_record (ULONGEST insn) | |
3702 | { | |
8b88a78e | 3703 | current_top_target ()->goto_record (insn); |
d02ed0bb MM |
3704 | } |
3705 | ||
67c86d06 MM |
3706 | /* See target.h. */ |
3707 | ||
3708 | void | |
9a24775b | 3709 | target_insn_history (int size, gdb_disassembly_flags flags) |
67c86d06 | 3710 | { |
8b88a78e | 3711 | current_top_target ()->insn_history (size, flags); |
67c86d06 MM |
3712 | } |
3713 | ||
3714 | /* See target.h. */ | |
3715 | ||
3716 | void | |
9a24775b PA |
3717 | target_insn_history_from (ULONGEST from, int size, |
3718 | gdb_disassembly_flags flags) | |
67c86d06 | 3719 | { |
8b88a78e | 3720 | current_top_target ()->insn_history_from (from, size, flags); |
67c86d06 MM |
3721 | } |
3722 | ||
3723 | /* See target.h. */ | |
3724 | ||
3725 | void | |
9a24775b PA |
3726 | target_insn_history_range (ULONGEST begin, ULONGEST end, |
3727 | gdb_disassembly_flags flags) | |
67c86d06 | 3728 | { |
8b88a78e | 3729 | current_top_target ()->insn_history_range (begin, end, flags); |
67c86d06 MM |
3730 | } |
3731 | ||
15984c13 MM |
3732 | /* See target.h. */ |
3733 | ||
3734 | void | |
0cb7c7b0 | 3735 | target_call_history (int size, record_print_flags flags) |
15984c13 | 3736 | { |
8b88a78e | 3737 | current_top_target ()->call_history (size, flags); |
15984c13 MM |
3738 | } |
3739 | ||
3740 | /* See target.h. */ | |
3741 | ||
3742 | void | |
0cb7c7b0 | 3743 | target_call_history_from (ULONGEST begin, int size, record_print_flags flags) |
15984c13 | 3744 | { |
8b88a78e | 3745 | current_top_target ()->call_history_from (begin, size, flags); |
15984c13 MM |
3746 | } |
3747 | ||
3748 | /* See target.h. */ | |
3749 | ||
3750 | void | |
0cb7c7b0 | 3751 | target_call_history_range (ULONGEST begin, ULONGEST end, record_print_flags flags) |
15984c13 | 3752 | { |
8b88a78e | 3753 | current_top_target ()->call_history_range (begin, end, flags); |
15984c13 MM |
3754 | } |
3755 | ||
ea001bdc MM |
3756 | /* See target.h. */ |
3757 | ||
3758 | const struct frame_unwind * | |
3759 | target_get_unwinder (void) | |
3760 | { | |
8b88a78e | 3761 | return current_top_target ()->get_unwinder (); |
ea001bdc MM |
3762 | } |
3763 | ||
3764 | /* See target.h. */ | |
3765 | ||
3766 | const struct frame_unwind * | |
3767 | target_get_tailcall_unwinder (void) | |
3768 | { | |
8b88a78e | 3769 | return current_top_target ()->get_tailcall_unwinder (); |
ea001bdc MM |
3770 | } |
3771 | ||
5fff78c4 MM |
3772 | /* See target.h. */ |
3773 | ||
3774 | void | |
3775 | target_prepare_to_generate_core (void) | |
3776 | { | |
8b88a78e | 3777 | current_top_target ()->prepare_to_generate_core (); |
5fff78c4 MM |
3778 | } |
3779 | ||
3780 | /* See target.h. */ | |
3781 | ||
3782 | void | |
3783 | target_done_generating_core (void) | |
3784 | { | |
8b88a78e | 3785 | current_top_target ()->done_generating_core (); |
5fff78c4 MM |
3786 | } |
3787 | ||
c906108c | 3788 | \f |
c5aa993b JM |
3789 | |
3790 | static char targ_desc[] = | |
3e43a32a MS |
3791 | "Names of targets and files being debugged.\nShows the entire \ |
3792 | stack of targets currently in use (including the exec-file,\n\ | |
c906108c SS |
3793 | core-file, and process, if any), as well as the symbol file name."; |
3794 | ||
a53f3625 | 3795 | static void |
a30bf1f1 TT |
3796 | default_rcmd (struct target_ops *self, const char *command, |
3797 | struct ui_file *output) | |
a53f3625 TT |
3798 | { |
3799 | error (_("\"monitor\" command not supported by this target.")); | |
3800 | } | |
3801 | ||
96baa820 | 3802 | static void |
0b39b52e | 3803 | do_monitor_command (const char *cmd, int from_tty) |
96baa820 | 3804 | { |
96baa820 JM |
3805 | target_rcmd (cmd, gdb_stdtarg); |
3806 | } | |
3807 | ||
78cbbba8 LM |
3808 | /* Erases all the memory regions marked as flash. CMD and FROM_TTY are |
3809 | ignored. */ | |
3810 | ||
3811 | void | |
0b39b52e | 3812 | flash_erase_command (const char *cmd, int from_tty) |
78cbbba8 LM |
3813 | { |
3814 | /* Used to communicate termination of flash operations to the target. */ | |
3815 | bool found_flash_region = false; | |
78cbbba8 LM |
3816 | struct gdbarch *gdbarch = target_gdbarch (); |
3817 | ||
a664f67e | 3818 | std::vector<mem_region> mem_regions = target_memory_map (); |
78cbbba8 LM |
3819 | |
3820 | /* Iterate over all memory regions. */ | |
a664f67e | 3821 | for (const mem_region &m : mem_regions) |
78cbbba8 | 3822 | { |
78cbbba8 | 3823 | /* Is this a flash memory region? */ |
a664f67e | 3824 | if (m.attrib.mode == MEM_FLASH) |
78cbbba8 LM |
3825 | { |
3826 | found_flash_region = true; | |
a664f67e | 3827 | target_flash_erase (m.lo, m.hi - m.lo); |
78cbbba8 | 3828 | |
76f9c9cf | 3829 | ui_out_emit_tuple tuple_emitter (current_uiout, "erased-regions"); |
78cbbba8 LM |
3830 | |
3831 | current_uiout->message (_("Erasing flash memory region at address ")); | |
ca8d69be | 3832 | current_uiout->field_core_addr ("address", gdbarch, m.lo); |
78cbbba8 | 3833 | current_uiout->message (", size = "); |
33eca680 | 3834 | current_uiout->field_string ("size", hex_string (m.hi - m.lo)); |
78cbbba8 | 3835 | current_uiout->message ("\n"); |
78cbbba8 LM |
3836 | } |
3837 | } | |
3838 | ||
3839 | /* Did we do any flash operations? If so, we need to finalize them. */ | |
3840 | if (found_flash_region) | |
3841 | target_flash_done (); | |
3842 | else | |
3843 | current_uiout->message (_("No flash memory regions found.\n")); | |
3844 | } | |
3845 | ||
87680a14 JB |
3846 | /* Print the name of each layers of our target stack. */ |
3847 | ||
3848 | static void | |
d3cb6b99 | 3849 | maintenance_print_target_stack (const char *cmd, int from_tty) |
87680a14 | 3850 | { |
87680a14 JB |
3851 | printf_filtered (_("The current target stack is:\n")); |
3852 | ||
b6a8c27b | 3853 | for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
87680a14 | 3854 | { |
66b4deae | 3855 | if (t->stratum () == debug_stratum) |
f6ac5f3d PA |
3856 | continue; |
3857 | printf_filtered (" - %s (%s)\n", t->shortname (), t->longname ()); | |
87680a14 JB |
3858 | } |
3859 | } | |
3860 | ||
372316f1 PA |
3861 | /* See target.h. */ |
3862 | ||
3863 | void | |
3864 | target_async (int enable) | |
3865 | { | |
3866 | infrun_async (enable); | |
8b88a78e | 3867 | current_top_target ()->async (enable); |
372316f1 PA |
3868 | } |
3869 | ||
65706a29 PA |
3870 | /* See target.h. */ |
3871 | ||
3872 | void | |
3873 | target_thread_events (int enable) | |
3874 | { | |
8b88a78e | 3875 | current_top_target ()->thread_events (enable); |
65706a29 PA |
3876 | } |
3877 | ||
329ea579 PA |
3878 | /* Controls if targets can report that they can/are async. This is |
3879 | just for maintainers to use when debugging gdb. */ | |
491144b5 | 3880 | bool target_async_permitted = true; |
c6ebd6cf VP |
3881 | |
3882 | /* The set command writes to this variable. If the inferior is | |
b5419e49 | 3883 | executing, target_async_permitted is *not* updated. */ |
491144b5 | 3884 | static bool target_async_permitted_1 = true; |
c6ebd6cf VP |
3885 | |
3886 | static void | |
eb4c3f4a | 3887 | maint_set_target_async_command (const char *args, int from_tty, |
329ea579 | 3888 | struct cmd_list_element *c) |
c6ebd6cf | 3889 | { |
c35b1492 | 3890 | if (have_live_inferiors ()) |
c6ebd6cf VP |
3891 | { |
3892 | target_async_permitted_1 = target_async_permitted; | |
3893 | error (_("Cannot change this setting while the inferior is running.")); | |
3894 | } | |
3895 | ||
3896 | target_async_permitted = target_async_permitted_1; | |
3897 | } | |
3898 | ||
3899 | static void | |
329ea579 PA |
3900 | maint_show_target_async_command (struct ui_file *file, int from_tty, |
3901 | struct cmd_list_element *c, | |
3902 | const char *value) | |
c6ebd6cf | 3903 | { |
3e43a32a MS |
3904 | fprintf_filtered (file, |
3905 | _("Controlling the inferior in " | |
3906 | "asynchronous mode is %s.\n"), value); | |
c6ebd6cf VP |
3907 | } |
3908 | ||
fbea99ea PA |
3909 | /* Return true if the target operates in non-stop mode even with "set |
3910 | non-stop off". */ | |
3911 | ||
3912 | static int | |
3913 | target_always_non_stop_p (void) | |
3914 | { | |
8b88a78e | 3915 | return current_top_target ()->always_non_stop_p (); |
fbea99ea PA |
3916 | } |
3917 | ||
3918 | /* See target.h. */ | |
3919 | ||
3920 | int | |
3921 | target_is_non_stop_p (void) | |
3922 | { | |
3923 | return (non_stop | |
3924 | || target_non_stop_enabled == AUTO_BOOLEAN_TRUE | |
3925 | || (target_non_stop_enabled == AUTO_BOOLEAN_AUTO | |
3926 | && target_always_non_stop_p ())); | |
3927 | } | |
3928 | ||
3929 | /* Controls if targets can report that they always run in non-stop | |
3930 | mode. This is just for maintainers to use when debugging gdb. */ | |
3931 | enum auto_boolean target_non_stop_enabled = AUTO_BOOLEAN_AUTO; | |
3932 | ||
3933 | /* The set command writes to this variable. If the inferior is | |
3934 | executing, target_non_stop_enabled is *not* updated. */ | |
3935 | static enum auto_boolean target_non_stop_enabled_1 = AUTO_BOOLEAN_AUTO; | |
3936 | ||
3937 | /* Implementation of "maint set target-non-stop". */ | |
3938 | ||
3939 | static void | |
eb4c3f4a | 3940 | maint_set_target_non_stop_command (const char *args, int from_tty, |
fbea99ea PA |
3941 | struct cmd_list_element *c) |
3942 | { | |
3943 | if (have_live_inferiors ()) | |
3944 | { | |
3945 | target_non_stop_enabled_1 = target_non_stop_enabled; | |
3946 | error (_("Cannot change this setting while the inferior is running.")); | |
3947 | } | |
3948 | ||
3949 | target_non_stop_enabled = target_non_stop_enabled_1; | |
3950 | } | |
3951 | ||
3952 | /* Implementation of "maint show target-non-stop". */ | |
3953 | ||
3954 | static void | |
3955 | maint_show_target_non_stop_command (struct ui_file *file, int from_tty, | |
3956 | struct cmd_list_element *c, | |
3957 | const char *value) | |
3958 | { | |
3959 | if (target_non_stop_enabled == AUTO_BOOLEAN_AUTO) | |
3960 | fprintf_filtered (file, | |
3961 | _("Whether the target is always in non-stop mode " | |
3962 | "is %s (currently %s).\n"), value, | |
3963 | target_always_non_stop_p () ? "on" : "off"); | |
3964 | else | |
3965 | fprintf_filtered (file, | |
3966 | _("Whether the target is always in non-stop mode " | |
3967 | "is %s.\n"), value); | |
3968 | } | |
3969 | ||
d914c394 SS |
3970 | /* Temporary copies of permission settings. */ |
3971 | ||
491144b5 CB |
3972 | static bool may_write_registers_1 = true; |
3973 | static bool may_write_memory_1 = true; | |
3974 | static bool may_insert_breakpoints_1 = true; | |
3975 | static bool may_insert_tracepoints_1 = true; | |
3976 | static bool may_insert_fast_tracepoints_1 = true; | |
3977 | static bool may_stop_1 = true; | |
d914c394 SS |
3978 | |
3979 | /* Make the user-set values match the real values again. */ | |
3980 | ||
3981 | void | |
3982 | update_target_permissions (void) | |
3983 | { | |
3984 | may_write_registers_1 = may_write_registers; | |
3985 | may_write_memory_1 = may_write_memory; | |
3986 | may_insert_breakpoints_1 = may_insert_breakpoints; | |
3987 | may_insert_tracepoints_1 = may_insert_tracepoints; | |
3988 | may_insert_fast_tracepoints_1 = may_insert_fast_tracepoints; | |
3989 | may_stop_1 = may_stop; | |
3990 | } | |
3991 | ||
3992 | /* The one function handles (most of) the permission flags in the same | |
3993 | way. */ | |
3994 | ||
3995 | static void | |
eb4c3f4a | 3996 | set_target_permissions (const char *args, int from_tty, |
d914c394 SS |
3997 | struct cmd_list_element *c) |
3998 | { | |
3999 | if (target_has_execution) | |
4000 | { | |
4001 | update_target_permissions (); | |
4002 | error (_("Cannot change this setting while the inferior is running.")); | |
4003 | } | |
4004 | ||
4005 | /* Make the real values match the user-changed values. */ | |
4006 | may_write_registers = may_write_registers_1; | |
4007 | may_insert_breakpoints = may_insert_breakpoints_1; | |
4008 | may_insert_tracepoints = may_insert_tracepoints_1; | |
4009 | may_insert_fast_tracepoints = may_insert_fast_tracepoints_1; | |
4010 | may_stop = may_stop_1; | |
4011 | update_observer_mode (); | |
4012 | } | |
4013 | ||
4014 | /* Set memory write permission independently of observer mode. */ | |
4015 | ||
4016 | static void | |
eb4c3f4a | 4017 | set_write_memory_permission (const char *args, int from_tty, |
d914c394 SS |
4018 | struct cmd_list_element *c) |
4019 | { | |
4020 | /* Make the real values match the user-changed values. */ | |
4021 | may_write_memory = may_write_memory_1; | |
4022 | update_observer_mode (); | |
4023 | } | |
4024 | ||
c906108c | 4025 | void |
5b6d1e4f | 4026 | _initialize_target () |
c906108c | 4027 | { |
f6ac5f3d | 4028 | the_debug_target = new debug_target (); |
c906108c | 4029 | |
11db9430 SM |
4030 | add_info ("target", info_target_command, targ_desc); |
4031 | add_info ("files", info_target_command, targ_desc); | |
c906108c | 4032 | |
ccce17b0 | 4033 | add_setshow_zuinteger_cmd ("target", class_maintenance, &targetdebug, _("\ |
85c07804 AC |
4034 | Set target debugging."), _("\ |
4035 | Show target debugging."), _("\ | |
333dabeb | 4036 | When non-zero, target debugging is enabled. Higher numbers are more\n\ |
3cecbbbe TT |
4037 | verbose."), |
4038 | set_targetdebug, | |
ccce17b0 YQ |
4039 | show_targetdebug, |
4040 | &setdebuglist, &showdebuglist); | |
3a11626d | 4041 | |
2bc416ba | 4042 | add_setshow_boolean_cmd ("trust-readonly-sections", class_support, |
7915a72c AC |
4043 | &trust_readonly, _("\ |
4044 | Set mode for reading from readonly sections."), _("\ | |
4045 | Show mode for reading from readonly sections."), _("\ | |
3a11626d MS |
4046 | When this mode is on, memory reads from readonly sections (such as .text)\n\ |
4047 | will be read from the object file instead of from the target. This will\n\ | |
7915a72c | 4048 | result in significant performance improvement for remote targets."), |
2c5b56ce | 4049 | NULL, |
920d2a44 | 4050 | show_trust_readonly, |
e707bbc2 | 4051 | &setlist, &showlist); |
96baa820 JM |
4052 | |
4053 | add_com ("monitor", class_obscure, do_monitor_command, | |
1bedd215 | 4054 | _("Send a command to the remote monitor (remote targets only).")); |
96baa820 | 4055 | |
87680a14 JB |
4056 | add_cmd ("target-stack", class_maintenance, maintenance_print_target_stack, |
4057 | _("Print the name of each layer of the internal target stack."), | |
4058 | &maintenanceprintlist); | |
4059 | ||
c6ebd6cf VP |
4060 | add_setshow_boolean_cmd ("target-async", no_class, |
4061 | &target_async_permitted_1, _("\ | |
4062 | Set whether gdb controls the inferior in asynchronous mode."), _("\ | |
4063 | Show whether gdb controls the inferior in asynchronous mode."), _("\ | |
4064 | Tells gdb whether to control the inferior in asynchronous mode."), | |
329ea579 PA |
4065 | maint_set_target_async_command, |
4066 | maint_show_target_async_command, | |
4067 | &maintenance_set_cmdlist, | |
4068 | &maintenance_show_cmdlist); | |
c6ebd6cf | 4069 | |
fbea99ea PA |
4070 | add_setshow_auto_boolean_cmd ("target-non-stop", no_class, |
4071 | &target_non_stop_enabled_1, _("\ | |
4072 | Set whether gdb always controls the inferior in non-stop mode."), _("\ | |
4073 | Show whether gdb always controls the inferior in non-stop mode."), _("\ | |
4074 | Tells gdb whether to control the inferior in non-stop mode."), | |
4075 | maint_set_target_non_stop_command, | |
4076 | maint_show_target_non_stop_command, | |
4077 | &maintenance_set_cmdlist, | |
4078 | &maintenance_show_cmdlist); | |
4079 | ||
d914c394 SS |
4080 | add_setshow_boolean_cmd ("may-write-registers", class_support, |
4081 | &may_write_registers_1, _("\ | |
4082 | Set permission to write into registers."), _("\ | |
4083 | Show permission to write into registers."), _("\ | |
4084 | When this permission is on, GDB may write into the target's registers.\n\ | |
4085 | Otherwise, any sort of write attempt will result in an error."), | |
4086 | set_target_permissions, NULL, | |
4087 | &setlist, &showlist); | |
4088 | ||
4089 | add_setshow_boolean_cmd ("may-write-memory", class_support, | |
4090 | &may_write_memory_1, _("\ | |
4091 | Set permission to write into target memory."), _("\ | |
4092 | Show permission to write into target memory."), _("\ | |
4093 | When this permission is on, GDB may write into the target's memory.\n\ | |
4094 | Otherwise, any sort of write attempt will result in an error."), | |
4095 | set_write_memory_permission, NULL, | |
4096 | &setlist, &showlist); | |
4097 | ||
4098 | add_setshow_boolean_cmd ("may-insert-breakpoints", class_support, | |
4099 | &may_insert_breakpoints_1, _("\ | |
4100 | Set permission to insert breakpoints in the target."), _("\ | |
4101 | Show permission to insert breakpoints in the target."), _("\ | |
4102 | When this permission is on, GDB may insert breakpoints in the program.\n\ | |
4103 | Otherwise, any sort of insertion attempt will result in an error."), | |
4104 | set_target_permissions, NULL, | |
4105 | &setlist, &showlist); | |
4106 | ||
4107 | add_setshow_boolean_cmd ("may-insert-tracepoints", class_support, | |
4108 | &may_insert_tracepoints_1, _("\ | |
4109 | Set permission to insert tracepoints in the target."), _("\ | |
4110 | Show permission to insert tracepoints in the target."), _("\ | |
4111 | When this permission is on, GDB may insert tracepoints in the program.\n\ | |
4112 | Otherwise, any sort of insertion attempt will result in an error."), | |
4113 | set_target_permissions, NULL, | |
4114 | &setlist, &showlist); | |
4115 | ||
4116 | add_setshow_boolean_cmd ("may-insert-fast-tracepoints", class_support, | |
4117 | &may_insert_fast_tracepoints_1, _("\ | |
4118 | Set permission to insert fast tracepoints in the target."), _("\ | |
4119 | Show permission to insert fast tracepoints in the target."), _("\ | |
4120 | When this permission is on, GDB may insert fast tracepoints.\n\ | |
4121 | Otherwise, any sort of insertion attempt will result in an error."), | |
4122 | set_target_permissions, NULL, | |
4123 | &setlist, &showlist); | |
4124 | ||
4125 | add_setshow_boolean_cmd ("may-interrupt", class_support, | |
4126 | &may_stop_1, _("\ | |
4127 | Set permission to interrupt or signal the target."), _("\ | |
4128 | Show permission to interrupt or signal the target."), _("\ | |
4129 | When this permission is on, GDB may interrupt/stop the target's execution.\n\ | |
4130 | Otherwise, any attempt to interrupt or stop will be ignored."), | |
4131 | set_target_permissions, NULL, | |
4132 | &setlist, &showlist); | |
6a3cb8e8 | 4133 | |
78cbbba8 LM |
4134 | add_com ("flash-erase", no_class, flash_erase_command, |
4135 | _("Erase all flash memory regions.")); | |
4136 | ||
6a3cb8e8 PA |
4137 | add_setshow_boolean_cmd ("auto-connect-native-target", class_support, |
4138 | &auto_connect_native_target, _("\ | |
4139 | Set whether GDB may automatically connect to the native target."), _("\ | |
4140 | Show whether GDB may automatically connect to the native target."), _("\ | |
4141 | When on, and GDB is not connected to a target yet, GDB\n\ | |
4142 | attempts \"run\" and other commands with the native target."), | |
4143 | NULL, show_auto_connect_native_target, | |
4144 | &setlist, &showlist); | |
c906108c | 4145 | } |