Commit | Line | Data |
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c906108c | 1 | /* Select target systems and architectures at runtime for GDB. |
7998dfc3 | 2 | |
e2882c85 | 3 | Copyright (C) 1990-2018 Free Software Foundation, Inc. |
7998dfc3 | 4 | |
c906108c SS |
5 | Contributed by Cygnus Support. |
6 | ||
c5aa993b | 7 | This file is part of GDB. |
c906108c | 8 | |
c5aa993b JM |
9 | This program is free software; you can redistribute it and/or modify |
10 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 11 | the Free Software Foundation; either version 3 of the License, or |
c5aa993b | 12 | (at your option) any later version. |
c906108c | 13 | |
c5aa993b JM |
14 | This program is distributed in the hope that it will be useful, |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
c906108c | 18 | |
c5aa993b | 19 | You should have received a copy of the GNU General Public License |
a9762ec7 | 20 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c SS |
21 | |
22 | #include "defs.h" | |
c906108c | 23 | #include "target.h" |
68c765e2 | 24 | #include "target-dcache.h" |
c906108c SS |
25 | #include "gdbcmd.h" |
26 | #include "symtab.h" | |
27 | #include "inferior.h" | |
45741a9c | 28 | #include "infrun.h" |
c906108c SS |
29 | #include "bfd.h" |
30 | #include "symfile.h" | |
31 | #include "objfiles.h" | |
4930751a | 32 | #include "dcache.h" |
c906108c | 33 | #include <signal.h> |
4e052eda | 34 | #include "regcache.h" |
b6591e8b | 35 | #include "gdbcore.h" |
424163ea | 36 | #include "target-descriptions.h" |
e1ac3328 | 37 | #include "gdbthread.h" |
b9db4ced | 38 | #include "solib.h" |
07b82ea5 | 39 | #include "exec.h" |
edb3359d | 40 | #include "inline-frame.h" |
2f4d8875 | 41 | #include "tracepoint.h" |
7313baad | 42 | #include "gdb/fileio.h" |
8ffcbaaf | 43 | #include "agent.h" |
8de71aab | 44 | #include "auxv.h" |
a7068b60 | 45 | #include "target-debug.h" |
41fd2b0f PA |
46 | #include "top.h" |
47 | #include "event-top.h" | |
325fac50 | 48 | #include <algorithm> |
26fcd5d7 | 49 | #include "byte-vector.h" |
e671cd59 | 50 | #include "terminal.h" |
9018be22 | 51 | #include <algorithm> |
d9f719f1 | 52 | #include <unordered_map> |
c906108c | 53 | |
f0f9ff95 TT |
54 | static void generic_tls_error (void) ATTRIBUTE_NORETURN; |
55 | ||
0a4f40a2 | 56 | static void default_terminal_info (struct target_ops *, const char *, int); |
c906108c | 57 | |
5009afc5 AS |
58 | static int default_watchpoint_addr_within_range (struct target_ops *, |
59 | CORE_ADDR, CORE_ADDR, int); | |
60 | ||
31568a15 TT |
61 | static int default_region_ok_for_hw_watchpoint (struct target_ops *, |
62 | CORE_ADDR, int); | |
e0d24f8d | 63 | |
a30bf1f1 | 64 | static void default_rcmd (struct target_ops *, const char *, struct ui_file *); |
a53f3625 | 65 | |
4229b31d TT |
66 | static ptid_t default_get_ada_task_ptid (struct target_ops *self, |
67 | long lwp, long tid); | |
68 | ||
098dba18 TT |
69 | static int default_follow_fork (struct target_ops *self, int follow_child, |
70 | int detach_fork); | |
71 | ||
8d657035 TT |
72 | static void default_mourn_inferior (struct target_ops *self); |
73 | ||
58a5184e TT |
74 | static int default_search_memory (struct target_ops *ops, |
75 | CORE_ADDR start_addr, | |
76 | ULONGEST search_space_len, | |
77 | const gdb_byte *pattern, | |
78 | ULONGEST pattern_len, | |
79 | CORE_ADDR *found_addrp); | |
80 | ||
936d2992 PA |
81 | static int default_verify_memory (struct target_ops *self, |
82 | const gdb_byte *data, | |
83 | CORE_ADDR memaddr, ULONGEST size); | |
84 | ||
c25c4a8b | 85 | static void tcomplain (void) ATTRIBUTE_NORETURN; |
c906108c | 86 | |
a121b7c1 | 87 | static struct target_ops *find_default_run_target (const char *); |
c906108c | 88 | |
0b5a2719 TT |
89 | static int dummy_find_memory_regions (struct target_ops *self, |
90 | find_memory_region_ftype ignore1, | |
91 | void *ignore2); | |
92 | ||
16f796b1 TT |
93 | static char *dummy_make_corefile_notes (struct target_ops *self, |
94 | bfd *ignore1, int *ignore2); | |
95 | ||
7a114964 | 96 | static const char *default_pid_to_str (struct target_ops *ops, ptid_t ptid); |
770234d3 | 97 | |
fe31bf5b TT |
98 | static enum exec_direction_kind default_execution_direction |
99 | (struct target_ops *self); | |
100 | ||
d9f719f1 PA |
101 | /* Mapping between target_info objects (which have address identity) |
102 | and corresponding open/factory function/callback. Each add_target | |
103 | call adds one entry to this map, and registers a "target | |
104 | TARGET_NAME" command that when invoked calls the factory registered | |
105 | here. The target_info object is associated with the command via | |
106 | the command's context. */ | |
107 | static std::unordered_map<const target_info *, target_open_ftype *> | |
108 | target_factories; | |
c906108c SS |
109 | |
110 | /* The initial current target, so that there is always a semi-valid | |
111 | current target. */ | |
112 | ||
f6ac5f3d PA |
113 | static struct target_ops *the_dummy_target; |
114 | static struct target_ops *the_debug_target; | |
c906108c | 115 | |
a1740ee1 PA |
116 | /* The target stack. */ |
117 | ||
118 | static target_stack g_target_stack; | |
119 | ||
c906108c | 120 | /* Top of target stack. */ |
c906108c SS |
121 | /* The target structure we are currently using to talk to a process |
122 | or file or whatever "inferior" we have. */ | |
123 | ||
8b88a78e PA |
124 | target_ops * |
125 | current_top_target () | |
126 | { | |
a1740ee1 | 127 | return g_target_stack.top (); |
8b88a78e | 128 | } |
c906108c SS |
129 | |
130 | /* Command list for target. */ | |
131 | ||
132 | static struct cmd_list_element *targetlist = NULL; | |
133 | ||
cf7a04e8 DJ |
134 | /* Nonzero if we should trust readonly sections from the |
135 | executable when reading memory. */ | |
136 | ||
137 | static int trust_readonly = 0; | |
138 | ||
8defab1a DJ |
139 | /* Nonzero if we should show true memory content including |
140 | memory breakpoint inserted by gdb. */ | |
141 | ||
142 | static int show_memory_breakpoints = 0; | |
143 | ||
d914c394 SS |
144 | /* These globals control whether GDB attempts to perform these |
145 | operations; they are useful for targets that need to prevent | |
146 | inadvertant disruption, such as in non-stop mode. */ | |
147 | ||
148 | int may_write_registers = 1; | |
149 | ||
150 | int may_write_memory = 1; | |
151 | ||
152 | int may_insert_breakpoints = 1; | |
153 | ||
154 | int may_insert_tracepoints = 1; | |
155 | ||
156 | int may_insert_fast_tracepoints = 1; | |
157 | ||
158 | int may_stop = 1; | |
159 | ||
c906108c SS |
160 | /* Non-zero if we want to see trace of target level stuff. */ |
161 | ||
ccce17b0 | 162 | static unsigned int targetdebug = 0; |
3cecbbbe TT |
163 | |
164 | static void | |
eb4c3f4a | 165 | set_targetdebug (const char *args, int from_tty, struct cmd_list_element *c) |
3cecbbbe | 166 | { |
f6ac5f3d PA |
167 | if (targetdebug) |
168 | push_target (the_debug_target); | |
169 | else | |
170 | unpush_target (the_debug_target); | |
3cecbbbe TT |
171 | } |
172 | ||
920d2a44 AC |
173 | static void |
174 | show_targetdebug (struct ui_file *file, int from_tty, | |
175 | struct cmd_list_element *c, const char *value) | |
176 | { | |
177 | fprintf_filtered (file, _("Target debugging is %s.\n"), value); | |
178 | } | |
c906108c | 179 | |
c906108c SS |
180 | /* The user just typed 'target' without the name of a target. */ |
181 | ||
c906108c | 182 | static void |
981a3fb3 | 183 | target_command (const char *arg, int from_tty) |
c906108c SS |
184 | { |
185 | fputs_filtered ("Argument required (target name). Try `help target'\n", | |
186 | gdb_stdout); | |
187 | } | |
188 | ||
c35b1492 PA |
189 | int |
190 | target_has_all_memory_1 (void) | |
191 | { | |
b6a8c27b | 192 | for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
f6ac5f3d | 193 | if (t->has_all_memory ()) |
c35b1492 PA |
194 | return 1; |
195 | ||
196 | return 0; | |
197 | } | |
198 | ||
199 | int | |
200 | target_has_memory_1 (void) | |
201 | { | |
b6a8c27b | 202 | for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
f6ac5f3d | 203 | if (t->has_memory ()) |
c35b1492 PA |
204 | return 1; |
205 | ||
206 | return 0; | |
207 | } | |
208 | ||
209 | int | |
210 | target_has_stack_1 (void) | |
211 | { | |
b6a8c27b | 212 | for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
f6ac5f3d | 213 | if (t->has_stack ()) |
c35b1492 PA |
214 | return 1; |
215 | ||
216 | return 0; | |
217 | } | |
218 | ||
219 | int | |
220 | target_has_registers_1 (void) | |
221 | { | |
b6a8c27b | 222 | for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
f6ac5f3d | 223 | if (t->has_registers ()) |
c35b1492 PA |
224 | return 1; |
225 | ||
226 | return 0; | |
227 | } | |
228 | ||
229 | int | |
aeaec162 | 230 | target_has_execution_1 (ptid_t the_ptid) |
c35b1492 | 231 | { |
b6a8c27b | 232 | for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
f6ac5f3d | 233 | if (t->has_execution (the_ptid)) |
c35b1492 PA |
234 | return 1; |
235 | ||
236 | return 0; | |
237 | } | |
238 | ||
aeaec162 TT |
239 | int |
240 | target_has_execution_current (void) | |
241 | { | |
242 | return target_has_execution_1 (inferior_ptid); | |
243 | } | |
244 | ||
8981c758 TT |
245 | /* This is used to implement the various target commands. */ |
246 | ||
247 | static void | |
eb4c3f4a | 248 | open_target (const char *args, int from_tty, struct cmd_list_element *command) |
8981c758 | 249 | { |
d9f719f1 PA |
250 | auto *ti = static_cast<target_info *> (get_cmd_context (command)); |
251 | target_open_ftype *func = target_factories[ti]; | |
8981c758 TT |
252 | |
253 | if (targetdebug) | |
d9f719f1 PA |
254 | fprintf_unfiltered (gdb_stdlog, "-> %s->open (...)\n", |
255 | ti->shortname); | |
8981c758 | 256 | |
d9f719f1 | 257 | func (args, from_tty); |
8981c758 TT |
258 | |
259 | if (targetdebug) | |
d9f719f1 PA |
260 | fprintf_unfiltered (gdb_stdlog, "<- %s->open (%s, %d)\n", |
261 | ti->shortname, args, from_tty); | |
8981c758 TT |
262 | } |
263 | ||
d9f719f1 | 264 | /* See target.h. */ |
c22a2b88 TT |
265 | |
266 | void | |
d9f719f1 PA |
267 | add_target (const target_info &t, target_open_ftype *func, |
268 | completer_ftype *completer) | |
c22a2b88 TT |
269 | { |
270 | struct cmd_list_element *c; | |
271 | ||
d9f719f1 PA |
272 | auto &func_slot = target_factories[&t]; |
273 | if (func_slot != nullptr) | |
274 | internal_error (__FILE__, __LINE__, | |
275 | _("target already added (\"%s\")."), t.shortname); | |
276 | func_slot = func; | |
c906108c SS |
277 | |
278 | if (targetlist == NULL) | |
1bedd215 AC |
279 | add_prefix_cmd ("target", class_run, target_command, _("\ |
280 | Connect to a target machine or process.\n\ | |
c906108c SS |
281 | The first argument is the type or protocol of the target machine.\n\ |
282 | Remaining arguments are interpreted by the target protocol. For more\n\ | |
283 | information on the arguments for a particular protocol, type\n\ | |
1bedd215 | 284 | `help target ' followed by the protocol name."), |
c906108c | 285 | &targetlist, "target ", 0, &cmdlist); |
d9f719f1 PA |
286 | c = add_cmd (t.shortname, no_class, t.doc, &targetlist); |
287 | set_cmd_context (c, (void *) &t); | |
8981c758 | 288 | set_cmd_sfunc (c, open_target); |
9852c492 YQ |
289 | if (completer != NULL) |
290 | set_cmd_completer (c, completer); | |
291 | } | |
292 | ||
b48d48eb MM |
293 | /* See target.h. */ |
294 | ||
295 | void | |
d9f719f1 | 296 | add_deprecated_target_alias (const target_info &tinfo, const char *alias) |
b48d48eb MM |
297 | { |
298 | struct cmd_list_element *c; | |
299 | char *alt; | |
300 | ||
301 | /* If we use add_alias_cmd, here, we do not get the deprecated warning, | |
302 | see PR cli/15104. */ | |
d9f719f1 | 303 | c = add_cmd (alias, no_class, tinfo.doc, &targetlist); |
8981c758 | 304 | set_cmd_sfunc (c, open_target); |
d9f719f1 PA |
305 | set_cmd_context (c, (void *) &tinfo); |
306 | alt = xstrprintf ("target %s", tinfo.shortname); | |
b48d48eb MM |
307 | deprecate_cmd (c, alt); |
308 | } | |
309 | ||
c906108c SS |
310 | /* Stub functions */ |
311 | ||
7d85a9c0 JB |
312 | void |
313 | target_kill (void) | |
314 | { | |
8b88a78e | 315 | current_top_target ()->kill (); |
7d85a9c0 JB |
316 | } |
317 | ||
11cf8741 | 318 | void |
9cbe5fff | 319 | target_load (const char *arg, int from_tty) |
11cf8741 | 320 | { |
4e5d721f | 321 | target_dcache_invalidate (); |
8b88a78e | 322 | current_top_target ()->load (arg, from_tty); |
11cf8741 JM |
323 | } |
324 | ||
223ffa71 | 325 | /* Define it. */ |
5842f62a | 326 | |
e671cd59 PA |
327 | target_terminal_state target_terminal::m_terminal_state |
328 | = target_terminal_state::is_ours; | |
5842f62a | 329 | |
223ffa71 | 330 | /* See target/target.h. */ |
5842f62a PA |
331 | |
332 | void | |
223ffa71 | 333 | target_terminal::init (void) |
5842f62a | 334 | { |
8b88a78e | 335 | current_top_target ()->terminal_init (); |
5842f62a | 336 | |
e671cd59 | 337 | m_terminal_state = target_terminal_state::is_ours; |
5842f62a PA |
338 | } |
339 | ||
223ffa71 | 340 | /* See target/target.h. */ |
2f99e8fc | 341 | |
d9d2d8b6 | 342 | void |
223ffa71 | 343 | target_terminal::inferior (void) |
d9d2d8b6 | 344 | { |
41fd2b0f PA |
345 | struct ui *ui = current_ui; |
346 | ||
d9d2d8b6 | 347 | /* A background resume (``run&'') should leave GDB in control of the |
3b12939d PA |
348 | terminal. */ |
349 | if (ui->prompt_state != PROMPT_BLOCKED) | |
d9d2d8b6 PA |
350 | return; |
351 | ||
215d3118 PA |
352 | /* Since we always run the inferior in the main console (unless "set |
353 | inferior-tty" is in effect), when some UI other than the main one | |
223ffa71 TT |
354 | calls target_terminal::inferior, then we leave the main UI's |
355 | terminal settings as is. */ | |
215d3118 PA |
356 | if (ui != main_ui) |
357 | return; | |
358 | ||
d9d2d8b6 PA |
359 | /* If GDB is resuming the inferior in the foreground, install |
360 | inferior's terminal modes. */ | |
e671cd59 PA |
361 | |
362 | struct inferior *inf = current_inferior (); | |
363 | ||
364 | if (inf->terminal_state != target_terminal_state::is_inferior) | |
365 | { | |
8b88a78e | 366 | current_top_target ()->terminal_inferior (); |
e671cd59 PA |
367 | inf->terminal_state = target_terminal_state::is_inferior; |
368 | } | |
369 | ||
370 | m_terminal_state = target_terminal_state::is_inferior; | |
371 | ||
372 | /* If the user hit C-c before, pretend that it was hit right | |
373 | here. */ | |
374 | if (check_quit_flag ()) | |
375 | target_pass_ctrlc (); | |
376 | } | |
377 | ||
378 | /* See target/target.h. */ | |
379 | ||
380 | void | |
381 | target_terminal::restore_inferior (void) | |
382 | { | |
383 | struct ui *ui = current_ui; | |
384 | ||
385 | /* See target_terminal::inferior(). */ | |
386 | if (ui->prompt_state != PROMPT_BLOCKED || ui != main_ui) | |
387 | return; | |
388 | ||
389 | /* Restore the terminal settings of inferiors that were in the | |
390 | foreground but are now ours_for_output due to a temporary | |
391 | target_target::ours_for_output() call. */ | |
392 | ||
393 | { | |
394 | scoped_restore_current_inferior restore_inferior; | |
e671cd59 | 395 | |
08036331 | 396 | for (struct inferior *inf : all_inferiors ()) |
e671cd59 PA |
397 | { |
398 | if (inf->terminal_state == target_terminal_state::is_ours_for_output) | |
399 | { | |
400 | set_current_inferior (inf); | |
8b88a78e | 401 | current_top_target ()->terminal_inferior (); |
e671cd59 PA |
402 | inf->terminal_state = target_terminal_state::is_inferior; |
403 | } | |
404 | } | |
405 | } | |
406 | ||
407 | m_terminal_state = target_terminal_state::is_inferior; | |
93692b58 PA |
408 | |
409 | /* If the user hit C-c before, pretend that it was hit right | |
410 | here. */ | |
411 | if (check_quit_flag ()) | |
412 | target_pass_ctrlc (); | |
5842f62a PA |
413 | } |
414 | ||
e671cd59 PA |
415 | /* Switch terminal state to DESIRED_STATE, either is_ours, or |
416 | is_ours_for_output. */ | |
417 | ||
418 | static void | |
419 | target_terminal_is_ours_kind (target_terminal_state desired_state) | |
420 | { | |
421 | scoped_restore_current_inferior restore_inferior; | |
e671cd59 PA |
422 | |
423 | /* Must do this in two passes. First, have all inferiors save the | |
424 | current terminal settings. Then, after all inferiors have add a | |
425 | chance to safely save the terminal settings, restore GDB's | |
426 | terminal settings. */ | |
427 | ||
08036331 | 428 | for (inferior *inf : all_inferiors ()) |
e671cd59 PA |
429 | { |
430 | if (inf->terminal_state == target_terminal_state::is_inferior) | |
431 | { | |
432 | set_current_inferior (inf); | |
8b88a78e | 433 | current_top_target ()->terminal_save_inferior (); |
e671cd59 PA |
434 | } |
435 | } | |
436 | ||
08036331 | 437 | for (inferior *inf : all_inferiors ()) |
e671cd59 PA |
438 | { |
439 | /* Note we don't check is_inferior here like above because we | |
440 | need to handle 'is_ours_for_output -> is_ours' too. Careful | |
441 | to never transition from 'is_ours' to 'is_ours_for_output', | |
442 | though. */ | |
443 | if (inf->terminal_state != target_terminal_state::is_ours | |
444 | && inf->terminal_state != desired_state) | |
445 | { | |
446 | set_current_inferior (inf); | |
447 | if (desired_state == target_terminal_state::is_ours) | |
8b88a78e | 448 | current_top_target ()->terminal_ours (); |
e671cd59 | 449 | else if (desired_state == target_terminal_state::is_ours_for_output) |
8b88a78e | 450 | current_top_target ()->terminal_ours_for_output (); |
e671cd59 PA |
451 | else |
452 | gdb_assert_not_reached ("unhandled desired state"); | |
453 | inf->terminal_state = desired_state; | |
454 | } | |
455 | } | |
456 | } | |
457 | ||
223ffa71 | 458 | /* See target/target.h. */ |
5842f62a PA |
459 | |
460 | void | |
223ffa71 | 461 | target_terminal::ours () |
5842f62a | 462 | { |
41fd2b0f PA |
463 | struct ui *ui = current_ui; |
464 | ||
223ffa71 | 465 | /* See target_terminal::inferior. */ |
215d3118 PA |
466 | if (ui != main_ui) |
467 | return; | |
468 | ||
e671cd59 | 469 | if (m_terminal_state == target_terminal_state::is_ours) |
5842f62a PA |
470 | return; |
471 | ||
e671cd59 PA |
472 | target_terminal_is_ours_kind (target_terminal_state::is_ours); |
473 | m_terminal_state = target_terminal_state::is_ours; | |
5842f62a PA |
474 | } |
475 | ||
223ffa71 | 476 | /* See target/target.h. */ |
5842f62a PA |
477 | |
478 | void | |
223ffa71 | 479 | target_terminal::ours_for_output () |
5842f62a | 480 | { |
215d3118 PA |
481 | struct ui *ui = current_ui; |
482 | ||
223ffa71 | 483 | /* See target_terminal::inferior. */ |
215d3118 PA |
484 | if (ui != main_ui) |
485 | return; | |
486 | ||
e671cd59 | 487 | if (!target_terminal::is_inferior ()) |
5842f62a | 488 | return; |
e671cd59 PA |
489 | |
490 | target_terminal_is_ours_kind (target_terminal_state::is_ours_for_output); | |
491 | target_terminal::m_terminal_state = target_terminal_state::is_ours_for_output; | |
d9d2d8b6 | 492 | } |
136d6dae | 493 | |
223ffa71 TT |
494 | /* See target/target.h. */ |
495 | ||
496 | void | |
497 | target_terminal::info (const char *arg, int from_tty) | |
498 | { | |
8b88a78e | 499 | current_top_target ()->terminal_info (arg, from_tty); |
223ffa71 TT |
500 | } |
501 | ||
b0ed115f TT |
502 | /* See target.h. */ |
503 | ||
20f0d60d | 504 | bool |
b0ed115f TT |
505 | target_supports_terminal_ours (void) |
506 | { | |
20f0d60d TT |
507 | /* This can be called before there is any target, so we must check |
508 | for nullptr here. */ | |
509 | target_ops *top = current_top_target (); | |
510 | ||
511 | if (top == nullptr) | |
512 | return false; | |
513 | return top->supports_terminal_ours (); | |
b0ed115f TT |
514 | } |
515 | ||
c906108c | 516 | static void |
fba45db2 | 517 | tcomplain (void) |
c906108c | 518 | { |
8a3fe4f8 | 519 | error (_("You can't do that when your target is `%s'"), |
8b88a78e | 520 | current_top_target ()->shortname ()); |
c906108c SS |
521 | } |
522 | ||
523 | void | |
fba45db2 | 524 | noprocess (void) |
c906108c | 525 | { |
8a3fe4f8 | 526 | error (_("You can't do that without a process to debug.")); |
c906108c SS |
527 | } |
528 | ||
c906108c | 529 | static void |
0a4f40a2 | 530 | default_terminal_info (struct target_ops *self, const char *args, int from_tty) |
c906108c | 531 | { |
a3f17187 | 532 | printf_unfiltered (_("No saved terminal information.\n")); |
c906108c SS |
533 | } |
534 | ||
0ef643c8 JB |
535 | /* A default implementation for the to_get_ada_task_ptid target method. |
536 | ||
537 | This function builds the PTID by using both LWP and TID as part of | |
538 | the PTID lwp and tid elements. The pid used is the pid of the | |
539 | inferior_ptid. */ | |
540 | ||
2c0b251b | 541 | static ptid_t |
1e6b91a4 | 542 | default_get_ada_task_ptid (struct target_ops *self, long lwp, long tid) |
0ef643c8 | 543 | { |
e99b03dc | 544 | return ptid_t (inferior_ptid.pid (), lwp, tid); |
0ef643c8 JB |
545 | } |
546 | ||
32231432 | 547 | static enum exec_direction_kind |
4c612759 | 548 | default_execution_direction (struct target_ops *self) |
32231432 PA |
549 | { |
550 | if (!target_can_execute_reverse) | |
551 | return EXEC_FORWARD; | |
552 | else if (!target_can_async_p ()) | |
553 | return EXEC_FORWARD; | |
554 | else | |
555 | gdb_assert_not_reached ("\ | |
556 | to_execution_direction must be implemented for reverse async"); | |
557 | } | |
558 | ||
a1740ee1 | 559 | /* See target.h. */ |
c906108c | 560 | |
b26a4dcb | 561 | void |
a1740ee1 | 562 | target_stack::push (target_ops *t) |
c906108c | 563 | { |
a1740ee1 PA |
564 | /* If there's already a target at this stratum, remove it. */ |
565 | if (m_stack[t->to_stratum] != NULL) | |
c906108c | 566 | { |
a1740ee1 PA |
567 | target_ops *prev = m_stack[t->to_stratum]; |
568 | m_stack[t->to_stratum] = NULL; | |
569 | target_close (prev); | |
c906108c SS |
570 | } |
571 | ||
a1740ee1 PA |
572 | /* Now add the new one. */ |
573 | m_stack[t->to_stratum] = t; | |
5d502164 | 574 | |
a1740ee1 PA |
575 | if (m_top < t->to_stratum) |
576 | m_top = t->to_stratum; | |
577 | } | |
578 | ||
579 | /* See target.h. */ | |
c906108c | 580 | |
a1740ee1 PA |
581 | void |
582 | push_target (struct target_ops *t) | |
583 | { | |
584 | g_target_stack.push (t); | |
c906108c SS |
585 | } |
586 | ||
a1740ee1 | 587 | /* See target.h. */ |
c906108c SS |
588 | |
589 | int | |
fba45db2 | 590 | unpush_target (struct target_ops *t) |
a1740ee1 PA |
591 | { |
592 | return g_target_stack.unpush (t); | |
593 | } | |
594 | ||
595 | /* See target.h. */ | |
596 | ||
597 | bool | |
598 | target_stack::unpush (target_ops *t) | |
c906108c | 599 | { |
c8d104ad PA |
600 | if (t->to_stratum == dummy_stratum) |
601 | internal_error (__FILE__, __LINE__, | |
9b20d036 | 602 | _("Attempt to unpush the dummy target")); |
c8d104ad | 603 | |
a1740ee1 PA |
604 | gdb_assert (t != NULL); |
605 | ||
606 | /* Look for the specified target. Note that a target can only occur | |
607 | once in the target stack. */ | |
c906108c | 608 | |
a1740ee1 | 609 | if (m_stack[t->to_stratum] != t) |
258b763a | 610 | { |
a1740ee1 PA |
611 | /* If T wasn't pushed, quit. Only open targets should be |
612 | closed. */ | |
613 | return false; | |
258b763a | 614 | } |
c906108c | 615 | |
c378eb4e | 616 | /* Unchain the target. */ |
a1740ee1 PA |
617 | m_stack[t->to_stratum] = NULL; |
618 | ||
619 | if (m_top == t->to_stratum) | |
620 | m_top = t->beneath ()->to_stratum; | |
c906108c | 621 | |
305436e0 PA |
622 | /* Finally close the target. Note we do this after unchaining, so |
623 | any target method calls from within the target_close | |
624 | implementation don't end up in T anymore. */ | |
460014f5 | 625 | target_close (t); |
305436e0 | 626 | |
a1740ee1 | 627 | return true; |
c906108c SS |
628 | } |
629 | ||
915ef8b1 PA |
630 | /* Unpush TARGET and assert that it worked. */ |
631 | ||
632 | static void | |
633 | unpush_target_and_assert (struct target_ops *target) | |
634 | { | |
635 | if (!unpush_target (target)) | |
636 | { | |
637 | fprintf_unfiltered (gdb_stderr, | |
638 | "pop_all_targets couldn't find target %s\n", | |
f6ac5f3d | 639 | target->shortname ()); |
915ef8b1 PA |
640 | internal_error (__FILE__, __LINE__, |
641 | _("failed internal consistency check")); | |
642 | } | |
643 | } | |
644 | ||
aa76d38d | 645 | void |
460014f5 | 646 | pop_all_targets_above (enum strata above_stratum) |
aa76d38d | 647 | { |
8b88a78e PA |
648 | while ((int) (current_top_target ()->to_stratum) > (int) above_stratum) |
649 | unpush_target_and_assert (current_top_target ()); | |
915ef8b1 PA |
650 | } |
651 | ||
652 | /* See target.h. */ | |
653 | ||
654 | void | |
655 | pop_all_targets_at_and_above (enum strata stratum) | |
656 | { | |
8b88a78e PA |
657 | while ((int) (current_top_target ()->to_stratum) >= (int) stratum) |
658 | unpush_target_and_assert (current_top_target ()); | |
aa76d38d PA |
659 | } |
660 | ||
87ab71f0 | 661 | void |
460014f5 | 662 | pop_all_targets (void) |
87ab71f0 | 663 | { |
460014f5 | 664 | pop_all_targets_above (dummy_stratum); |
87ab71f0 PA |
665 | } |
666 | ||
c0edd9ed JK |
667 | /* Return 1 if T is now pushed in the target stack. Return 0 otherwise. */ |
668 | ||
669 | int | |
670 | target_is_pushed (struct target_ops *t) | |
671 | { | |
a1740ee1 | 672 | return g_target_stack.is_pushed (t); |
c0edd9ed JK |
673 | } |
674 | ||
f0f9ff95 TT |
675 | /* Default implementation of to_get_thread_local_address. */ |
676 | ||
677 | static void | |
678 | generic_tls_error (void) | |
679 | { | |
680 | throw_error (TLS_GENERIC_ERROR, | |
681 | _("Cannot find thread-local variables on this target")); | |
682 | } | |
683 | ||
72f5cf0e | 684 | /* Using the objfile specified in OBJFILE, find the address for the |
9e35dae4 DJ |
685 | current thread's thread-local storage with offset OFFSET. */ |
686 | CORE_ADDR | |
687 | target_translate_tls_address (struct objfile *objfile, CORE_ADDR offset) | |
688 | { | |
689 | volatile CORE_ADDR addr = 0; | |
8b88a78e | 690 | struct target_ops *target = current_top_target (); |
9e35dae4 | 691 | |
f0f9ff95 | 692 | if (gdbarch_fetch_tls_load_module_address_p (target_gdbarch ())) |
9e35dae4 DJ |
693 | { |
694 | ptid_t ptid = inferior_ptid; | |
9e35dae4 | 695 | |
492d29ea | 696 | TRY |
9e35dae4 DJ |
697 | { |
698 | CORE_ADDR lm_addr; | |
699 | ||
700 | /* Fetch the load module address for this objfile. */ | |
f5656ead | 701 | lm_addr = gdbarch_fetch_tls_load_module_address (target_gdbarch (), |
9e35dae4 | 702 | objfile); |
9e35dae4 | 703 | |
f6ac5f3d | 704 | addr = target->get_thread_local_address (ptid, lm_addr, offset); |
9e35dae4 DJ |
705 | } |
706 | /* If an error occurred, print TLS related messages here. Otherwise, | |
707 | throw the error to some higher catcher. */ | |
492d29ea | 708 | CATCH (ex, RETURN_MASK_ALL) |
9e35dae4 DJ |
709 | { |
710 | int objfile_is_library = (objfile->flags & OBJF_SHARED); | |
711 | ||
712 | switch (ex.error) | |
713 | { | |
714 | case TLS_NO_LIBRARY_SUPPORT_ERROR: | |
3e43a32a MS |
715 | error (_("Cannot find thread-local variables " |
716 | "in this thread library.")); | |
9e35dae4 DJ |
717 | break; |
718 | case TLS_LOAD_MODULE_NOT_FOUND_ERROR: | |
719 | if (objfile_is_library) | |
720 | error (_("Cannot find shared library `%s' in dynamic" | |
4262abfb | 721 | " linker's load module list"), objfile_name (objfile)); |
9e35dae4 DJ |
722 | else |
723 | error (_("Cannot find executable file `%s' in dynamic" | |
4262abfb | 724 | " linker's load module list"), objfile_name (objfile)); |
9e35dae4 DJ |
725 | break; |
726 | case TLS_NOT_ALLOCATED_YET_ERROR: | |
727 | if (objfile_is_library) | |
728 | error (_("The inferior has not yet allocated storage for" | |
729 | " thread-local variables in\n" | |
730 | "the shared library `%s'\n" | |
731 | "for %s"), | |
4262abfb | 732 | objfile_name (objfile), target_pid_to_str (ptid)); |
9e35dae4 DJ |
733 | else |
734 | error (_("The inferior has not yet allocated storage for" | |
735 | " thread-local variables in\n" | |
736 | "the executable `%s'\n" | |
737 | "for %s"), | |
4262abfb | 738 | objfile_name (objfile), target_pid_to_str (ptid)); |
9e35dae4 DJ |
739 | break; |
740 | case TLS_GENERIC_ERROR: | |
741 | if (objfile_is_library) | |
742 | error (_("Cannot find thread-local storage for %s, " | |
743 | "shared library %s:\n%s"), | |
744 | target_pid_to_str (ptid), | |
4262abfb | 745 | objfile_name (objfile), ex.message); |
9e35dae4 DJ |
746 | else |
747 | error (_("Cannot find thread-local storage for %s, " | |
748 | "executable file %s:\n%s"), | |
749 | target_pid_to_str (ptid), | |
4262abfb | 750 | objfile_name (objfile), ex.message); |
9e35dae4 DJ |
751 | break; |
752 | default: | |
753 | throw_exception (ex); | |
754 | break; | |
755 | } | |
756 | } | |
492d29ea | 757 | END_CATCH |
9e35dae4 DJ |
758 | } |
759 | /* It wouldn't be wrong here to try a gdbarch method, too; finding | |
760 | TLS is an ABI-specific thing. But we don't do that yet. */ | |
761 | else | |
762 | error (_("Cannot find thread-local variables on this target")); | |
763 | ||
764 | return addr; | |
765 | } | |
766 | ||
6be7b56e | 767 | const char * |
01cb8804 | 768 | target_xfer_status_to_string (enum target_xfer_status status) |
6be7b56e PA |
769 | { |
770 | #define CASE(X) case X: return #X | |
01cb8804 | 771 | switch (status) |
6be7b56e PA |
772 | { |
773 | CASE(TARGET_XFER_E_IO); | |
bc113b4e | 774 | CASE(TARGET_XFER_UNAVAILABLE); |
6be7b56e PA |
775 | default: |
776 | return "<unknown>"; | |
777 | } | |
778 | #undef CASE | |
779 | }; | |
780 | ||
781 | ||
c906108c SS |
782 | #undef MIN |
783 | #define MIN(A, B) (((A) <= (B)) ? (A) : (B)) | |
784 | ||
785 | /* target_read_string -- read a null terminated string, up to LEN bytes, | |
786 | from MEMADDR in target. Set *ERRNOP to the errno code, or 0 if successful. | |
787 | Set *STRING to a pointer to malloc'd memory containing the data; the caller | |
788 | is responsible for freeing it. Return the number of bytes successfully | |
789 | read. */ | |
790 | ||
791 | int | |
e83e4e24 TT |
792 | target_read_string (CORE_ADDR memaddr, gdb::unique_xmalloc_ptr<char> *string, |
793 | int len, int *errnop) | |
c906108c | 794 | { |
c2e8b827 | 795 | int tlen, offset, i; |
1b0ba102 | 796 | gdb_byte buf[4]; |
c906108c SS |
797 | int errcode = 0; |
798 | char *buffer; | |
799 | int buffer_allocated; | |
800 | char *bufptr; | |
801 | unsigned int nbytes_read = 0; | |
802 | ||
6217bf3e MS |
803 | gdb_assert (string); |
804 | ||
c906108c SS |
805 | /* Small for testing. */ |
806 | buffer_allocated = 4; | |
224c3ddb | 807 | buffer = (char *) xmalloc (buffer_allocated); |
c906108c SS |
808 | bufptr = buffer; |
809 | ||
c906108c SS |
810 | while (len > 0) |
811 | { | |
812 | tlen = MIN (len, 4 - (memaddr & 3)); | |
813 | offset = memaddr & 3; | |
814 | ||
1b0ba102 | 815 | errcode = target_read_memory (memaddr & ~3, buf, sizeof buf); |
c906108c SS |
816 | if (errcode != 0) |
817 | { | |
818 | /* The transfer request might have crossed the boundary to an | |
c378eb4e | 819 | unallocated region of memory. Retry the transfer, requesting |
c906108c SS |
820 | a single byte. */ |
821 | tlen = 1; | |
822 | offset = 0; | |
b8eb5af0 | 823 | errcode = target_read_memory (memaddr, buf, 1); |
c906108c SS |
824 | if (errcode != 0) |
825 | goto done; | |
826 | } | |
827 | ||
828 | if (bufptr - buffer + tlen > buffer_allocated) | |
829 | { | |
830 | unsigned int bytes; | |
5d502164 | 831 | |
c906108c SS |
832 | bytes = bufptr - buffer; |
833 | buffer_allocated *= 2; | |
224c3ddb | 834 | buffer = (char *) xrealloc (buffer, buffer_allocated); |
c906108c SS |
835 | bufptr = buffer + bytes; |
836 | } | |
837 | ||
838 | for (i = 0; i < tlen; i++) | |
839 | { | |
840 | *bufptr++ = buf[i + offset]; | |
841 | if (buf[i + offset] == '\000') | |
842 | { | |
843 | nbytes_read += i + 1; | |
844 | goto done; | |
845 | } | |
846 | } | |
847 | ||
848 | memaddr += tlen; | |
849 | len -= tlen; | |
850 | nbytes_read += tlen; | |
851 | } | |
c5aa993b | 852 | done: |
e83e4e24 | 853 | string->reset (buffer); |
c906108c SS |
854 | if (errnop != NULL) |
855 | *errnop = errcode; | |
c906108c SS |
856 | return nbytes_read; |
857 | } | |
858 | ||
07b82ea5 PA |
859 | struct target_section_table * |
860 | target_get_section_table (struct target_ops *target) | |
861 | { | |
f6ac5f3d | 862 | return target->get_section_table (); |
07b82ea5 PA |
863 | } |
864 | ||
8db32d44 | 865 | /* Find a section containing ADDR. */ |
07b82ea5 | 866 | |
0542c86d | 867 | struct target_section * |
8db32d44 AC |
868 | target_section_by_addr (struct target_ops *target, CORE_ADDR addr) |
869 | { | |
07b82ea5 | 870 | struct target_section_table *table = target_get_section_table (target); |
0542c86d | 871 | struct target_section *secp; |
07b82ea5 PA |
872 | |
873 | if (table == NULL) | |
874 | return NULL; | |
875 | ||
876 | for (secp = table->sections; secp < table->sections_end; secp++) | |
8db32d44 AC |
877 | { |
878 | if (addr >= secp->addr && addr < secp->endaddr) | |
879 | return secp; | |
880 | } | |
881 | return NULL; | |
882 | } | |
883 | ||
0fec99e8 PA |
884 | |
885 | /* Helper for the memory xfer routines. Checks the attributes of the | |
886 | memory region of MEMADDR against the read or write being attempted. | |
887 | If the access is permitted returns true, otherwise returns false. | |
888 | REGION_P is an optional output parameter. If not-NULL, it is | |
889 | filled with a pointer to the memory region of MEMADDR. REG_LEN | |
890 | returns LEN trimmed to the end of the region. This is how much the | |
891 | caller can continue requesting, if the access is permitted. A | |
892 | single xfer request must not straddle memory region boundaries. */ | |
893 | ||
894 | static int | |
895 | memory_xfer_check_region (gdb_byte *readbuf, const gdb_byte *writebuf, | |
896 | ULONGEST memaddr, ULONGEST len, ULONGEST *reg_len, | |
897 | struct mem_region **region_p) | |
898 | { | |
899 | struct mem_region *region; | |
900 | ||
901 | region = lookup_mem_region (memaddr); | |
902 | ||
903 | if (region_p != NULL) | |
904 | *region_p = region; | |
905 | ||
906 | switch (region->attrib.mode) | |
907 | { | |
908 | case MEM_RO: | |
909 | if (writebuf != NULL) | |
910 | return 0; | |
911 | break; | |
912 | ||
913 | case MEM_WO: | |
914 | if (readbuf != NULL) | |
915 | return 0; | |
916 | break; | |
917 | ||
918 | case MEM_FLASH: | |
919 | /* We only support writing to flash during "load" for now. */ | |
920 | if (writebuf != NULL) | |
921 | error (_("Writing to flash memory forbidden in this context")); | |
922 | break; | |
923 | ||
924 | case MEM_NONE: | |
925 | return 0; | |
926 | } | |
927 | ||
928 | /* region->hi == 0 means there's no upper bound. */ | |
929 | if (memaddr + len < region->hi || region->hi == 0) | |
930 | *reg_len = len; | |
931 | else | |
932 | *reg_len = region->hi - memaddr; | |
933 | ||
934 | return 1; | |
935 | } | |
936 | ||
9f713294 YQ |
937 | /* Read memory from more than one valid target. A core file, for |
938 | instance, could have some of memory but delegate other bits to | |
939 | the target below it. So, we must manually try all targets. */ | |
940 | ||
cc9f16aa | 941 | enum target_xfer_status |
17fde6d0 | 942 | raw_memory_xfer_partial (struct target_ops *ops, gdb_byte *readbuf, |
9b409511 YQ |
943 | const gdb_byte *writebuf, ULONGEST memaddr, LONGEST len, |
944 | ULONGEST *xfered_len) | |
9f713294 | 945 | { |
9b409511 | 946 | enum target_xfer_status res; |
9f713294 YQ |
947 | |
948 | do | |
949 | { | |
f6ac5f3d PA |
950 | res = ops->xfer_partial (TARGET_OBJECT_MEMORY, NULL, |
951 | readbuf, writebuf, memaddr, len, | |
952 | xfered_len); | |
9b409511 | 953 | if (res == TARGET_XFER_OK) |
9f713294 YQ |
954 | break; |
955 | ||
633785ff | 956 | /* Stop if the target reports that the memory is not available. */ |
bc113b4e | 957 | if (res == TARGET_XFER_UNAVAILABLE) |
633785ff MM |
958 | break; |
959 | ||
9f713294 YQ |
960 | /* We want to continue past core files to executables, but not |
961 | past a running target's memory. */ | |
f6ac5f3d | 962 | if (ops->has_all_memory ()) |
9f713294 YQ |
963 | break; |
964 | ||
b6a8c27b | 965 | ops = ops->beneath (); |
9f713294 YQ |
966 | } |
967 | while (ops != NULL); | |
968 | ||
0f26cec1 PA |
969 | /* The cache works at the raw memory level. Make sure the cache |
970 | gets updated with raw contents no matter what kind of memory | |
971 | object was originally being written. Note we do write-through | |
972 | first, so that if it fails, we don't write to the cache contents | |
973 | that never made it to the target. */ | |
974 | if (writebuf != NULL | |
d7e15655 | 975 | && inferior_ptid != null_ptid |
0f26cec1 PA |
976 | && target_dcache_init_p () |
977 | && (stack_cache_enabled_p () || code_cache_enabled_p ())) | |
978 | { | |
979 | DCACHE *dcache = target_dcache_get (); | |
980 | ||
981 | /* Note that writing to an area of memory which wasn't present | |
982 | in the cache doesn't cause it to be loaded in. */ | |
983 | dcache_update (dcache, res, memaddr, writebuf, *xfered_len); | |
984 | } | |
985 | ||
9f713294 YQ |
986 | return res; |
987 | } | |
988 | ||
7f79c47e DE |
989 | /* Perform a partial memory transfer. |
990 | For docs see target.h, to_xfer_partial. */ | |
cf7a04e8 | 991 | |
9b409511 | 992 | static enum target_xfer_status |
f0ba3972 | 993 | memory_xfer_partial_1 (struct target_ops *ops, enum target_object object, |
17fde6d0 | 994 | gdb_byte *readbuf, const gdb_byte *writebuf, ULONGEST memaddr, |
9b409511 | 995 | ULONGEST len, ULONGEST *xfered_len) |
0779438d | 996 | { |
9b409511 | 997 | enum target_xfer_status res; |
0fec99e8 | 998 | ULONGEST reg_len; |
cf7a04e8 | 999 | struct mem_region *region; |
4e5d721f | 1000 | struct inferior *inf; |
cf7a04e8 | 1001 | |
07b82ea5 PA |
1002 | /* For accesses to unmapped overlay sections, read directly from |
1003 | files. Must do this first, as MEMADDR may need adjustment. */ | |
1004 | if (readbuf != NULL && overlay_debugging) | |
1005 | { | |
1006 | struct obj_section *section = find_pc_overlay (memaddr); | |
5d502164 | 1007 | |
07b82ea5 PA |
1008 | if (pc_in_unmapped_range (memaddr, section)) |
1009 | { | |
1010 | struct target_section_table *table | |
1011 | = target_get_section_table (ops); | |
1012 | const char *section_name = section->the_bfd_section->name; | |
5d502164 | 1013 | |
07b82ea5 PA |
1014 | memaddr = overlay_mapped_address (memaddr, section); |
1015 | return section_table_xfer_memory_partial (readbuf, writebuf, | |
9b409511 | 1016 | memaddr, len, xfered_len, |
07b82ea5 PA |
1017 | table->sections, |
1018 | table->sections_end, | |
1019 | section_name); | |
1020 | } | |
1021 | } | |
1022 | ||
1023 | /* Try the executable files, if "trust-readonly-sections" is set. */ | |
cf7a04e8 DJ |
1024 | if (readbuf != NULL && trust_readonly) |
1025 | { | |
0542c86d | 1026 | struct target_section *secp; |
07b82ea5 | 1027 | struct target_section_table *table; |
cf7a04e8 DJ |
1028 | |
1029 | secp = target_section_by_addr (ops, memaddr); | |
1030 | if (secp != NULL | |
2b2848e2 DE |
1031 | && (bfd_get_section_flags (secp->the_bfd_section->owner, |
1032 | secp->the_bfd_section) | |
cf7a04e8 | 1033 | & SEC_READONLY)) |
07b82ea5 PA |
1034 | { |
1035 | table = target_get_section_table (ops); | |
1036 | return section_table_xfer_memory_partial (readbuf, writebuf, | |
9b409511 | 1037 | memaddr, len, xfered_len, |
07b82ea5 PA |
1038 | table->sections, |
1039 | table->sections_end, | |
1040 | NULL); | |
1041 | } | |
98646950 UW |
1042 | } |
1043 | ||
cf7a04e8 | 1044 | /* Try GDB's internal data cache. */ |
cf7a04e8 | 1045 | |
0fec99e8 PA |
1046 | if (!memory_xfer_check_region (readbuf, writebuf, memaddr, len, ®_len, |
1047 | ®ion)) | |
1048 | return TARGET_XFER_E_IO; | |
cf7a04e8 | 1049 | |
d7e15655 | 1050 | if (inferior_ptid != null_ptid) |
00431a78 | 1051 | inf = current_inferior (); |
6c95b8df PA |
1052 | else |
1053 | inf = NULL; | |
4e5d721f DE |
1054 | |
1055 | if (inf != NULL | |
0f26cec1 | 1056 | && readbuf != NULL |
2f4d8875 PA |
1057 | /* The dcache reads whole cache lines; that doesn't play well |
1058 | with reading from a trace buffer, because reading outside of | |
1059 | the collected memory range fails. */ | |
1060 | && get_traceframe_number () == -1 | |
4e5d721f | 1061 | && (region->attrib.cache |
29453a14 YQ |
1062 | || (stack_cache_enabled_p () && object == TARGET_OBJECT_STACK_MEMORY) |
1063 | || (code_cache_enabled_p () && object == TARGET_OBJECT_CODE_MEMORY))) | |
cf7a04e8 | 1064 | { |
2a2f9fe4 YQ |
1065 | DCACHE *dcache = target_dcache_get_or_init (); |
1066 | ||
0f26cec1 PA |
1067 | return dcache_read_memory_partial (ops, dcache, memaddr, readbuf, |
1068 | reg_len, xfered_len); | |
cf7a04e8 DJ |
1069 | } |
1070 | ||
1071 | /* If none of those methods found the memory we wanted, fall back | |
1072 | to a target partial transfer. Normally a single call to | |
1073 | to_xfer_partial is enough; if it doesn't recognize an object | |
1074 | it will call the to_xfer_partial of the next target down. | |
1075 | But for memory this won't do. Memory is the only target | |
9b409511 YQ |
1076 | object which can be read from more than one valid target. |
1077 | A core file, for instance, could have some of memory but | |
1078 | delegate other bits to the target below it. So, we must | |
1079 | manually try all targets. */ | |
1080 | ||
1081 | res = raw_memory_xfer_partial (ops, readbuf, writebuf, memaddr, reg_len, | |
1082 | xfered_len); | |
cf7a04e8 DJ |
1083 | |
1084 | /* If we still haven't got anything, return the last error. We | |
1085 | give up. */ | |
1086 | return res; | |
0779438d AC |
1087 | } |
1088 | ||
f0ba3972 PA |
1089 | /* Perform a partial memory transfer. For docs see target.h, |
1090 | to_xfer_partial. */ | |
1091 | ||
9b409511 | 1092 | static enum target_xfer_status |
f0ba3972 | 1093 | memory_xfer_partial (struct target_ops *ops, enum target_object object, |
9b409511 YQ |
1094 | gdb_byte *readbuf, const gdb_byte *writebuf, |
1095 | ULONGEST memaddr, ULONGEST len, ULONGEST *xfered_len) | |
f0ba3972 | 1096 | { |
9b409511 | 1097 | enum target_xfer_status res; |
f0ba3972 PA |
1098 | |
1099 | /* Zero length requests are ok and require no work. */ | |
1100 | if (len == 0) | |
9b409511 | 1101 | return TARGET_XFER_EOF; |
f0ba3972 | 1102 | |
a738ea1d YQ |
1103 | memaddr = address_significant (target_gdbarch (), memaddr); |
1104 | ||
f0ba3972 PA |
1105 | /* Fill in READBUF with breakpoint shadows, or WRITEBUF with |
1106 | breakpoint insns, thus hiding out from higher layers whether | |
1107 | there are software breakpoints inserted in the code stream. */ | |
1108 | if (readbuf != NULL) | |
1109 | { | |
9b409511 YQ |
1110 | res = memory_xfer_partial_1 (ops, object, readbuf, NULL, memaddr, len, |
1111 | xfered_len); | |
f0ba3972 | 1112 | |
9b409511 | 1113 | if (res == TARGET_XFER_OK && !show_memory_breakpoints) |
c63528fc | 1114 | breakpoint_xfer_memory (readbuf, NULL, NULL, memaddr, *xfered_len); |
f0ba3972 PA |
1115 | } |
1116 | else | |
1117 | { | |
67c059c2 AB |
1118 | /* A large write request is likely to be partially satisfied |
1119 | by memory_xfer_partial_1. We will continually malloc | |
1120 | and free a copy of the entire write request for breakpoint | |
1121 | shadow handling even though we only end up writing a small | |
09c98b44 DB |
1122 | subset of it. Cap writes to a limit specified by the target |
1123 | to mitigate this. */ | |
f6ac5f3d | 1124 | len = std::min (ops->get_memory_xfer_limit (), len); |
67c059c2 | 1125 | |
26fcd5d7 TT |
1126 | gdb::byte_vector buf (writebuf, writebuf + len); |
1127 | breakpoint_xfer_memory (NULL, buf.data (), writebuf, memaddr, len); | |
1128 | res = memory_xfer_partial_1 (ops, object, NULL, buf.data (), memaddr, len, | |
9b409511 | 1129 | xfered_len); |
f0ba3972 PA |
1130 | } |
1131 | ||
1132 | return res; | |
1133 | } | |
1134 | ||
cb85b21b TT |
1135 | scoped_restore_tmpl<int> |
1136 | make_scoped_restore_show_memory_breakpoints (int show) | |
8defab1a | 1137 | { |
cb85b21b | 1138 | return make_scoped_restore (&show_memory_breakpoints, show); |
8defab1a DJ |
1139 | } |
1140 | ||
7f79c47e DE |
1141 | /* For docs see target.h, to_xfer_partial. */ |
1142 | ||
9b409511 | 1143 | enum target_xfer_status |
27394598 AC |
1144 | target_xfer_partial (struct target_ops *ops, |
1145 | enum target_object object, const char *annex, | |
4ac248ca | 1146 | gdb_byte *readbuf, const gdb_byte *writebuf, |
9b409511 YQ |
1147 | ULONGEST offset, ULONGEST len, |
1148 | ULONGEST *xfered_len) | |
27394598 | 1149 | { |
9b409511 | 1150 | enum target_xfer_status retval; |
27394598 | 1151 | |
ce6d0892 YQ |
1152 | /* Transfer is done when LEN is zero. */ |
1153 | if (len == 0) | |
9b409511 | 1154 | return TARGET_XFER_EOF; |
ce6d0892 | 1155 | |
d914c394 SS |
1156 | if (writebuf && !may_write_memory) |
1157 | error (_("Writing to memory is not allowed (addr %s, len %s)"), | |
1158 | core_addr_to_string_nz (offset), plongest (len)); | |
1159 | ||
9b409511 YQ |
1160 | *xfered_len = 0; |
1161 | ||
cf7a04e8 DJ |
1162 | /* If this is a memory transfer, let the memory-specific code |
1163 | have a look at it instead. Memory transfers are more | |
1164 | complicated. */ | |
29453a14 YQ |
1165 | if (object == TARGET_OBJECT_MEMORY || object == TARGET_OBJECT_STACK_MEMORY |
1166 | || object == TARGET_OBJECT_CODE_MEMORY) | |
4e5d721f | 1167 | retval = memory_xfer_partial (ops, object, readbuf, |
9b409511 | 1168 | writebuf, offset, len, xfered_len); |
9f713294 | 1169 | else if (object == TARGET_OBJECT_RAW_MEMORY) |
cf7a04e8 | 1170 | { |
0fec99e8 PA |
1171 | /* Skip/avoid accessing the target if the memory region |
1172 | attributes block the access. Check this here instead of in | |
1173 | raw_memory_xfer_partial as otherwise we'd end up checking | |
1174 | this twice in the case of the memory_xfer_partial path is | |
1175 | taken; once before checking the dcache, and another in the | |
1176 | tail call to raw_memory_xfer_partial. */ | |
1177 | if (!memory_xfer_check_region (readbuf, writebuf, offset, len, &len, | |
1178 | NULL)) | |
1179 | return TARGET_XFER_E_IO; | |
1180 | ||
9f713294 | 1181 | /* Request the normal memory object from other layers. */ |
9b409511 YQ |
1182 | retval = raw_memory_xfer_partial (ops, readbuf, writebuf, offset, len, |
1183 | xfered_len); | |
cf7a04e8 | 1184 | } |
9f713294 | 1185 | else |
f6ac5f3d PA |
1186 | retval = ops->xfer_partial (object, annex, readbuf, |
1187 | writebuf, offset, len, xfered_len); | |
cf7a04e8 | 1188 | |
27394598 AC |
1189 | if (targetdebug) |
1190 | { | |
1191 | const unsigned char *myaddr = NULL; | |
1192 | ||
1193 | fprintf_unfiltered (gdb_stdlog, | |
3e43a32a | 1194 | "%s:target_xfer_partial " |
9b409511 | 1195 | "(%d, %s, %s, %s, %s, %s) = %d, %s", |
f6ac5f3d | 1196 | ops->shortname (), |
27394598 AC |
1197 | (int) object, |
1198 | (annex ? annex : "(null)"), | |
53b71562 JB |
1199 | host_address_to_string (readbuf), |
1200 | host_address_to_string (writebuf), | |
0b1553bc | 1201 | core_addr_to_string_nz (offset), |
9b409511 YQ |
1202 | pulongest (len), retval, |
1203 | pulongest (*xfered_len)); | |
27394598 AC |
1204 | |
1205 | if (readbuf) | |
1206 | myaddr = readbuf; | |
1207 | if (writebuf) | |
1208 | myaddr = writebuf; | |
9b409511 | 1209 | if (retval == TARGET_XFER_OK && myaddr != NULL) |
27394598 AC |
1210 | { |
1211 | int i; | |
2bc416ba | 1212 | |
27394598 | 1213 | fputs_unfiltered (", bytes =", gdb_stdlog); |
9b409511 | 1214 | for (i = 0; i < *xfered_len; i++) |
27394598 | 1215 | { |
53b71562 | 1216 | if ((((intptr_t) &(myaddr[i])) & 0xf) == 0) |
27394598 AC |
1217 | { |
1218 | if (targetdebug < 2 && i > 0) | |
1219 | { | |
1220 | fprintf_unfiltered (gdb_stdlog, " ..."); | |
1221 | break; | |
1222 | } | |
1223 | fprintf_unfiltered (gdb_stdlog, "\n"); | |
1224 | } | |
2bc416ba | 1225 | |
27394598 AC |
1226 | fprintf_unfiltered (gdb_stdlog, " %02x", myaddr[i] & 0xff); |
1227 | } | |
1228 | } | |
2bc416ba | 1229 | |
27394598 AC |
1230 | fputc_unfiltered ('\n', gdb_stdlog); |
1231 | } | |
9b409511 YQ |
1232 | |
1233 | /* Check implementations of to_xfer_partial update *XFERED_LEN | |
1234 | properly. Do assertion after printing debug messages, so that we | |
1235 | can find more clues on assertion failure from debugging messages. */ | |
bc113b4e | 1236 | if (retval == TARGET_XFER_OK || retval == TARGET_XFER_UNAVAILABLE) |
9b409511 YQ |
1237 | gdb_assert (*xfered_len > 0); |
1238 | ||
27394598 AC |
1239 | return retval; |
1240 | } | |
1241 | ||
578d3588 PA |
1242 | /* Read LEN bytes of target memory at address MEMADDR, placing the |
1243 | results in GDB's memory at MYADDR. Returns either 0 for success or | |
d09f2c3f | 1244 | -1 if any error occurs. |
c906108c SS |
1245 | |
1246 | If an error occurs, no guarantee is made about the contents of the data at | |
1247 | MYADDR. In particular, the caller should not depend upon partial reads | |
1248 | filling the buffer with good data. There is no way for the caller to know | |
1249 | how much good data might have been transfered anyway. Callers that can | |
cf7a04e8 | 1250 | deal with partial reads should call target_read (which will retry until |
c378eb4e | 1251 | it makes no progress, and then return how much was transferred). */ |
c906108c SS |
1252 | |
1253 | int | |
1b162304 | 1254 | target_read_memory (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len) |
c906108c | 1255 | { |
8b88a78e | 1256 | if (target_read (current_top_target (), TARGET_OBJECT_MEMORY, NULL, |
cf7a04e8 DJ |
1257 | myaddr, memaddr, len) == len) |
1258 | return 0; | |
0779438d | 1259 | else |
d09f2c3f | 1260 | return -1; |
c906108c SS |
1261 | } |
1262 | ||
721ec300 GB |
1263 | /* See target/target.h. */ |
1264 | ||
1265 | int | |
1266 | target_read_uint32 (CORE_ADDR memaddr, uint32_t *result) | |
1267 | { | |
1268 | gdb_byte buf[4]; | |
1269 | int r; | |
1270 | ||
1271 | r = target_read_memory (memaddr, buf, sizeof buf); | |
1272 | if (r != 0) | |
1273 | return r; | |
1274 | *result = extract_unsigned_integer (buf, sizeof buf, | |
1275 | gdbarch_byte_order (target_gdbarch ())); | |
1276 | return 0; | |
1277 | } | |
1278 | ||
aee4bf85 PA |
1279 | /* Like target_read_memory, but specify explicitly that this is a read |
1280 | from the target's raw memory. That is, this read bypasses the | |
1281 | dcache, breakpoint shadowing, etc. */ | |
1282 | ||
1283 | int | |
1284 | target_read_raw_memory (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len) | |
1285 | { | |
8b88a78e | 1286 | if (target_read (current_top_target (), TARGET_OBJECT_RAW_MEMORY, NULL, |
aee4bf85 PA |
1287 | myaddr, memaddr, len) == len) |
1288 | return 0; | |
1289 | else | |
d09f2c3f | 1290 | return -1; |
aee4bf85 PA |
1291 | } |
1292 | ||
4e5d721f DE |
1293 | /* Like target_read_memory, but specify explicitly that this is a read from |
1294 | the target's stack. This may trigger different cache behavior. */ | |
1295 | ||
1296 | int | |
45aa4659 | 1297 | target_read_stack (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len) |
4e5d721f | 1298 | { |
8b88a78e | 1299 | if (target_read (current_top_target (), TARGET_OBJECT_STACK_MEMORY, NULL, |
4e5d721f DE |
1300 | myaddr, memaddr, len) == len) |
1301 | return 0; | |
1302 | else | |
d09f2c3f | 1303 | return -1; |
4e5d721f DE |
1304 | } |
1305 | ||
29453a14 YQ |
1306 | /* Like target_read_memory, but specify explicitly that this is a read from |
1307 | the target's code. This may trigger different cache behavior. */ | |
1308 | ||
1309 | int | |
1310 | target_read_code (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len) | |
1311 | { | |
8b88a78e | 1312 | if (target_read (current_top_target (), TARGET_OBJECT_CODE_MEMORY, NULL, |
29453a14 YQ |
1313 | myaddr, memaddr, len) == len) |
1314 | return 0; | |
1315 | else | |
d09f2c3f | 1316 | return -1; |
29453a14 YQ |
1317 | } |
1318 | ||
7f79c47e | 1319 | /* Write LEN bytes from MYADDR to target memory at address MEMADDR. |
d09f2c3f PA |
1320 | Returns either 0 for success or -1 if any error occurs. If an |
1321 | error occurs, no guarantee is made about how much data got written. | |
1322 | Callers that can deal with partial writes should call | |
1323 | target_write. */ | |
7f79c47e | 1324 | |
c906108c | 1325 | int |
45aa4659 | 1326 | target_write_memory (CORE_ADDR memaddr, const gdb_byte *myaddr, ssize_t len) |
c906108c | 1327 | { |
8b88a78e | 1328 | if (target_write (current_top_target (), TARGET_OBJECT_MEMORY, NULL, |
cf7a04e8 DJ |
1329 | myaddr, memaddr, len) == len) |
1330 | return 0; | |
0779438d | 1331 | else |
d09f2c3f | 1332 | return -1; |
c906108c | 1333 | } |
c5aa993b | 1334 | |
f0ba3972 | 1335 | /* Write LEN bytes from MYADDR to target raw memory at address |
d09f2c3f PA |
1336 | MEMADDR. Returns either 0 for success or -1 if any error occurs. |
1337 | If an error occurs, no guarantee is made about how much data got | |
1338 | written. Callers that can deal with partial writes should call | |
1339 | target_write. */ | |
f0ba3972 PA |
1340 | |
1341 | int | |
45aa4659 | 1342 | target_write_raw_memory (CORE_ADDR memaddr, const gdb_byte *myaddr, ssize_t len) |
f0ba3972 | 1343 | { |
8b88a78e | 1344 | if (target_write (current_top_target (), TARGET_OBJECT_RAW_MEMORY, NULL, |
f0ba3972 PA |
1345 | myaddr, memaddr, len) == len) |
1346 | return 0; | |
1347 | else | |
d09f2c3f | 1348 | return -1; |
f0ba3972 PA |
1349 | } |
1350 | ||
fd79ecee DJ |
1351 | /* Fetch the target's memory map. */ |
1352 | ||
a664f67e | 1353 | std::vector<mem_region> |
fd79ecee DJ |
1354 | target_memory_map (void) |
1355 | { | |
8b88a78e | 1356 | std::vector<mem_region> result = current_top_target ()->memory_map (); |
a664f67e SM |
1357 | if (result.empty ()) |
1358 | return result; | |
fd79ecee | 1359 | |
a664f67e | 1360 | std::sort (result.begin (), result.end ()); |
fd79ecee DJ |
1361 | |
1362 | /* Check that regions do not overlap. Simultaneously assign | |
1363 | a numbering for the "mem" commands to use to refer to | |
1364 | each region. */ | |
a664f67e SM |
1365 | mem_region *last_one = NULL; |
1366 | for (size_t ix = 0; ix < result.size (); ix++) | |
fd79ecee | 1367 | { |
a664f67e | 1368 | mem_region *this_one = &result[ix]; |
fd79ecee DJ |
1369 | this_one->number = ix; |
1370 | ||
a664f67e | 1371 | if (last_one != NULL && last_one->hi > this_one->lo) |
fd79ecee DJ |
1372 | { |
1373 | warning (_("Overlapping regions in memory map: ignoring")); | |
a664f67e | 1374 | return std::vector<mem_region> (); |
fd79ecee | 1375 | } |
a664f67e | 1376 | |
fd79ecee DJ |
1377 | last_one = this_one; |
1378 | } | |
1379 | ||
1380 | return result; | |
1381 | } | |
1382 | ||
a76d924d DJ |
1383 | void |
1384 | target_flash_erase (ULONGEST address, LONGEST length) | |
1385 | { | |
8b88a78e | 1386 | current_top_target ()->flash_erase (address, length); |
a76d924d DJ |
1387 | } |
1388 | ||
1389 | void | |
1390 | target_flash_done (void) | |
1391 | { | |
8b88a78e | 1392 | current_top_target ()->flash_done (); |
a76d924d DJ |
1393 | } |
1394 | ||
920d2a44 AC |
1395 | static void |
1396 | show_trust_readonly (struct ui_file *file, int from_tty, | |
1397 | struct cmd_list_element *c, const char *value) | |
1398 | { | |
3e43a32a MS |
1399 | fprintf_filtered (file, |
1400 | _("Mode for reading from readonly sections is %s.\n"), | |
920d2a44 AC |
1401 | value); |
1402 | } | |
3a11626d | 1403 | |
7f79c47e | 1404 | /* Target vector read/write partial wrapper functions. */ |
0088c768 | 1405 | |
9b409511 | 1406 | static enum target_xfer_status |
1e3ff5ad AC |
1407 | target_read_partial (struct target_ops *ops, |
1408 | enum target_object object, | |
1b0ba102 | 1409 | const char *annex, gdb_byte *buf, |
9b409511 YQ |
1410 | ULONGEST offset, ULONGEST len, |
1411 | ULONGEST *xfered_len) | |
1e3ff5ad | 1412 | { |
9b409511 YQ |
1413 | return target_xfer_partial (ops, object, annex, buf, NULL, offset, len, |
1414 | xfered_len); | |
1e3ff5ad AC |
1415 | } |
1416 | ||
8a55ffb0 | 1417 | static enum target_xfer_status |
1e3ff5ad AC |
1418 | target_write_partial (struct target_ops *ops, |
1419 | enum target_object object, | |
1b0ba102 | 1420 | const char *annex, const gdb_byte *buf, |
9b409511 | 1421 | ULONGEST offset, LONGEST len, ULONGEST *xfered_len) |
1e3ff5ad | 1422 | { |
9b409511 YQ |
1423 | return target_xfer_partial (ops, object, annex, NULL, buf, offset, len, |
1424 | xfered_len); | |
1e3ff5ad AC |
1425 | } |
1426 | ||
1427 | /* Wrappers to perform the full transfer. */ | |
7f79c47e DE |
1428 | |
1429 | /* For docs on target_read see target.h. */ | |
1430 | ||
1e3ff5ad AC |
1431 | LONGEST |
1432 | target_read (struct target_ops *ops, | |
1433 | enum target_object object, | |
1b0ba102 | 1434 | const char *annex, gdb_byte *buf, |
1e3ff5ad AC |
1435 | ULONGEST offset, LONGEST len) |
1436 | { | |
279a6fed | 1437 | LONGEST xfered_total = 0; |
d309493c SM |
1438 | int unit_size = 1; |
1439 | ||
1440 | /* If we are reading from a memory object, find the length of an addressable | |
1441 | unit for that architecture. */ | |
1442 | if (object == TARGET_OBJECT_MEMORY | |
1443 | || object == TARGET_OBJECT_STACK_MEMORY | |
1444 | || object == TARGET_OBJECT_CODE_MEMORY | |
1445 | || object == TARGET_OBJECT_RAW_MEMORY) | |
1446 | unit_size = gdbarch_addressable_memory_unit_size (target_gdbarch ()); | |
5d502164 | 1447 | |
279a6fed | 1448 | while (xfered_total < len) |
1e3ff5ad | 1449 | { |
279a6fed | 1450 | ULONGEST xfered_partial; |
9b409511 YQ |
1451 | enum target_xfer_status status; |
1452 | ||
1453 | status = target_read_partial (ops, object, annex, | |
d309493c | 1454 | buf + xfered_total * unit_size, |
279a6fed SM |
1455 | offset + xfered_total, len - xfered_total, |
1456 | &xfered_partial); | |
5d502164 | 1457 | |
1e3ff5ad | 1458 | /* Call an observer, notifying them of the xfer progress? */ |
9b409511 | 1459 | if (status == TARGET_XFER_EOF) |
279a6fed | 1460 | return xfered_total; |
9b409511 YQ |
1461 | else if (status == TARGET_XFER_OK) |
1462 | { | |
279a6fed | 1463 | xfered_total += xfered_partial; |
9b409511 YQ |
1464 | QUIT; |
1465 | } | |
1466 | else | |
279a6fed | 1467 | return TARGET_XFER_E_IO; |
9b409511 | 1468 | |
1e3ff5ad AC |
1469 | } |
1470 | return len; | |
1471 | } | |
1472 | ||
f1a507a1 JB |
1473 | /* Assuming that the entire [begin, end) range of memory cannot be |
1474 | read, try to read whatever subrange is possible to read. | |
1475 | ||
1476 | The function returns, in RESULT, either zero or one memory block. | |
1477 | If there's a readable subrange at the beginning, it is completely | |
1478 | read and returned. Any further readable subrange will not be read. | |
1479 | Otherwise, if there's a readable subrange at the end, it will be | |
1480 | completely read and returned. Any readable subranges before it | |
1481 | (obviously, not starting at the beginning), will be ignored. In | |
1482 | other cases -- either no readable subrange, or readable subrange(s) | |
1483 | that is neither at the beginning, or end, nothing is returned. | |
1484 | ||
1485 | The purpose of this function is to handle a read across a boundary | |
1486 | of accessible memory in a case when memory map is not available. | |
1487 | The above restrictions are fine for this case, but will give | |
1488 | incorrect results if the memory is 'patchy'. However, supporting | |
1489 | 'patchy' memory would require trying to read every single byte, | |
1490 | and it seems unacceptable solution. Explicit memory map is | |
1491 | recommended for this case -- and target_read_memory_robust will | |
1492 | take care of reading multiple ranges then. */ | |
8dedea02 VP |
1493 | |
1494 | static void | |
3e43a32a | 1495 | read_whatever_is_readable (struct target_ops *ops, |
279a6fed | 1496 | const ULONGEST begin, const ULONGEST end, |
d309493c | 1497 | int unit_size, |
386c8614 | 1498 | std::vector<memory_read_result> *result) |
d5086790 | 1499 | { |
8dedea02 VP |
1500 | ULONGEST current_begin = begin; |
1501 | ULONGEST current_end = end; | |
1502 | int forward; | |
9b409511 | 1503 | ULONGEST xfered_len; |
8dedea02 VP |
1504 | |
1505 | /* If we previously failed to read 1 byte, nothing can be done here. */ | |
1506 | if (end - begin <= 1) | |
386c8614 TT |
1507 | return; |
1508 | ||
1509 | gdb::unique_xmalloc_ptr<gdb_byte> buf ((gdb_byte *) xmalloc (end - begin)); | |
8dedea02 VP |
1510 | |
1511 | /* Check that either first or the last byte is readable, and give up | |
c378eb4e | 1512 | if not. This heuristic is meant to permit reading accessible memory |
8dedea02 VP |
1513 | at the boundary of accessible region. */ |
1514 | if (target_read_partial (ops, TARGET_OBJECT_MEMORY, NULL, | |
386c8614 | 1515 | buf.get (), begin, 1, &xfered_len) == TARGET_XFER_OK) |
8dedea02 VP |
1516 | { |
1517 | forward = 1; | |
1518 | ++current_begin; | |
1519 | } | |
1520 | else if (target_read_partial (ops, TARGET_OBJECT_MEMORY, NULL, | |
386c8614 | 1521 | buf.get () + (end - begin) - 1, end - 1, 1, |
9b409511 | 1522 | &xfered_len) == TARGET_XFER_OK) |
8dedea02 VP |
1523 | { |
1524 | forward = 0; | |
1525 | --current_end; | |
1526 | } | |
1527 | else | |
386c8614 | 1528 | return; |
8dedea02 VP |
1529 | |
1530 | /* Loop invariant is that the [current_begin, current_end) was previously | |
1531 | found to be not readable as a whole. | |
1532 | ||
1533 | Note loop condition -- if the range has 1 byte, we can't divide the range | |
1534 | so there's no point trying further. */ | |
1535 | while (current_end - current_begin > 1) | |
1536 | { | |
1537 | ULONGEST first_half_begin, first_half_end; | |
1538 | ULONGEST second_half_begin, second_half_end; | |
1539 | LONGEST xfer; | |
279a6fed | 1540 | ULONGEST middle = current_begin + (current_end - current_begin) / 2; |
f1a507a1 | 1541 | |
8dedea02 VP |
1542 | if (forward) |
1543 | { | |
1544 | first_half_begin = current_begin; | |
1545 | first_half_end = middle; | |
1546 | second_half_begin = middle; | |
1547 | second_half_end = current_end; | |
1548 | } | |
1549 | else | |
1550 | { | |
1551 | first_half_begin = middle; | |
1552 | first_half_end = current_end; | |
1553 | second_half_begin = current_begin; | |
1554 | second_half_end = middle; | |
1555 | } | |
1556 | ||
1557 | xfer = target_read (ops, TARGET_OBJECT_MEMORY, NULL, | |
386c8614 | 1558 | buf.get () + (first_half_begin - begin) * unit_size, |
8dedea02 VP |
1559 | first_half_begin, |
1560 | first_half_end - first_half_begin); | |
1561 | ||
1562 | if (xfer == first_half_end - first_half_begin) | |
1563 | { | |
c378eb4e | 1564 | /* This half reads up fine. So, the error must be in the |
3e43a32a | 1565 | other half. */ |
8dedea02 VP |
1566 | current_begin = second_half_begin; |
1567 | current_end = second_half_end; | |
1568 | } | |
1569 | else | |
1570 | { | |
c378eb4e | 1571 | /* This half is not readable. Because we've tried one byte, we |
279a6fed | 1572 | know some part of this half if actually readable. Go to the next |
8dedea02 VP |
1573 | iteration to divide again and try to read. |
1574 | ||
1575 | We don't handle the other half, because this function only tries | |
1576 | to read a single readable subrange. */ | |
1577 | current_begin = first_half_begin; | |
1578 | current_end = first_half_end; | |
1579 | } | |
1580 | } | |
1581 | ||
1582 | if (forward) | |
1583 | { | |
1584 | /* The [begin, current_begin) range has been read. */ | |
386c8614 | 1585 | result->emplace_back (begin, current_end, std::move (buf)); |
8dedea02 VP |
1586 | } |
1587 | else | |
1588 | { | |
1589 | /* The [current_end, end) range has been read. */ | |
279a6fed | 1590 | LONGEST region_len = end - current_end; |
f1a507a1 | 1591 | |
386c8614 TT |
1592 | gdb::unique_xmalloc_ptr<gdb_byte> data |
1593 | ((gdb_byte *) xmalloc (region_len * unit_size)); | |
1594 | memcpy (data.get (), buf.get () + (current_end - begin) * unit_size, | |
d309493c | 1595 | region_len * unit_size); |
386c8614 | 1596 | result->emplace_back (current_end, end, std::move (data)); |
8dedea02 | 1597 | } |
8dedea02 VP |
1598 | } |
1599 | ||
386c8614 | 1600 | std::vector<memory_read_result> |
279a6fed SM |
1601 | read_memory_robust (struct target_ops *ops, |
1602 | const ULONGEST offset, const LONGEST len) | |
8dedea02 | 1603 | { |
386c8614 | 1604 | std::vector<memory_read_result> result; |
d309493c | 1605 | int unit_size = gdbarch_addressable_memory_unit_size (target_gdbarch ()); |
8dedea02 | 1606 | |
279a6fed SM |
1607 | LONGEST xfered_total = 0; |
1608 | while (xfered_total < len) | |
d5086790 | 1609 | { |
279a6fed SM |
1610 | struct mem_region *region = lookup_mem_region (offset + xfered_total); |
1611 | LONGEST region_len; | |
5d502164 | 1612 | |
8dedea02 VP |
1613 | /* If there is no explicit region, a fake one should be created. */ |
1614 | gdb_assert (region); | |
1615 | ||
1616 | if (region->hi == 0) | |
279a6fed | 1617 | region_len = len - xfered_total; |
8dedea02 | 1618 | else |
279a6fed | 1619 | region_len = region->hi - offset; |
8dedea02 VP |
1620 | |
1621 | if (region->attrib.mode == MEM_NONE || region->attrib.mode == MEM_WO) | |
d5086790 | 1622 | { |
c378eb4e | 1623 | /* Cannot read this region. Note that we can end up here only |
8dedea02 VP |
1624 | if the region is explicitly marked inaccessible, or |
1625 | 'inaccessible-by-default' is in effect. */ | |
279a6fed | 1626 | xfered_total += region_len; |
8dedea02 VP |
1627 | } |
1628 | else | |
1629 | { | |
325fac50 | 1630 | LONGEST to_read = std::min (len - xfered_total, region_len); |
386c8614 TT |
1631 | gdb::unique_xmalloc_ptr<gdb_byte> buffer |
1632 | ((gdb_byte *) xmalloc (to_read * unit_size)); | |
8dedea02 | 1633 | |
279a6fed | 1634 | LONGEST xfered_partial = |
386c8614 | 1635 | target_read (ops, TARGET_OBJECT_MEMORY, NULL, buffer.get (), |
279a6fed | 1636 | offset + xfered_total, to_read); |
8dedea02 | 1637 | /* Call an observer, notifying them of the xfer progress? */ |
279a6fed | 1638 | if (xfered_partial <= 0) |
d5086790 | 1639 | { |
c378eb4e | 1640 | /* Got an error reading full chunk. See if maybe we can read |
8dedea02 | 1641 | some subrange. */ |
e084c964 DB |
1642 | read_whatever_is_readable (ops, offset + xfered_total, |
1643 | offset + xfered_total + to_read, | |
1644 | unit_size, &result); | |
279a6fed | 1645 | xfered_total += to_read; |
d5086790 | 1646 | } |
8dedea02 VP |
1647 | else |
1648 | { | |
386c8614 TT |
1649 | result.emplace_back (offset + xfered_total, |
1650 | offset + xfered_total + xfered_partial, | |
1651 | std::move (buffer)); | |
279a6fed | 1652 | xfered_total += xfered_partial; |
8dedea02 VP |
1653 | } |
1654 | QUIT; | |
d5086790 | 1655 | } |
d5086790 | 1656 | } |
9d78f827 | 1657 | |
8dedea02 | 1658 | return result; |
d5086790 VP |
1659 | } |
1660 | ||
8dedea02 | 1661 | |
cf7a04e8 DJ |
1662 | /* An alternative to target_write with progress callbacks. */ |
1663 | ||
1e3ff5ad | 1664 | LONGEST |
cf7a04e8 DJ |
1665 | target_write_with_progress (struct target_ops *ops, |
1666 | enum target_object object, | |
1667 | const char *annex, const gdb_byte *buf, | |
1668 | ULONGEST offset, LONGEST len, | |
1669 | void (*progress) (ULONGEST, void *), void *baton) | |
1e3ff5ad | 1670 | { |
279a6fed | 1671 | LONGEST xfered_total = 0; |
d309493c SM |
1672 | int unit_size = 1; |
1673 | ||
1674 | /* If we are writing to a memory object, find the length of an addressable | |
1675 | unit for that architecture. */ | |
1676 | if (object == TARGET_OBJECT_MEMORY | |
1677 | || object == TARGET_OBJECT_STACK_MEMORY | |
1678 | || object == TARGET_OBJECT_CODE_MEMORY | |
1679 | || object == TARGET_OBJECT_RAW_MEMORY) | |
1680 | unit_size = gdbarch_addressable_memory_unit_size (target_gdbarch ()); | |
a76d924d DJ |
1681 | |
1682 | /* Give the progress callback a chance to set up. */ | |
1683 | if (progress) | |
1684 | (*progress) (0, baton); | |
1685 | ||
279a6fed | 1686 | while (xfered_total < len) |
1e3ff5ad | 1687 | { |
279a6fed | 1688 | ULONGEST xfered_partial; |
9b409511 YQ |
1689 | enum target_xfer_status status; |
1690 | ||
1691 | status = target_write_partial (ops, object, annex, | |
d309493c | 1692 | buf + xfered_total * unit_size, |
279a6fed SM |
1693 | offset + xfered_total, len - xfered_total, |
1694 | &xfered_partial); | |
cf7a04e8 | 1695 | |
5c328c05 | 1696 | if (status != TARGET_XFER_OK) |
279a6fed | 1697 | return status == TARGET_XFER_EOF ? xfered_total : TARGET_XFER_E_IO; |
cf7a04e8 DJ |
1698 | |
1699 | if (progress) | |
279a6fed | 1700 | (*progress) (xfered_partial, baton); |
cf7a04e8 | 1701 | |
279a6fed | 1702 | xfered_total += xfered_partial; |
1e3ff5ad AC |
1703 | QUIT; |
1704 | } | |
1705 | return len; | |
1706 | } | |
1707 | ||
7f79c47e DE |
1708 | /* For docs on target_write see target.h. */ |
1709 | ||
cf7a04e8 DJ |
1710 | LONGEST |
1711 | target_write (struct target_ops *ops, | |
1712 | enum target_object object, | |
1713 | const char *annex, const gdb_byte *buf, | |
1714 | ULONGEST offset, LONGEST len) | |
1715 | { | |
1716 | return target_write_with_progress (ops, object, annex, buf, offset, len, | |
1717 | NULL, NULL); | |
1718 | } | |
1719 | ||
9018be22 SM |
1720 | /* Help for target_read_alloc and target_read_stralloc. See their comments |
1721 | for details. */ | |
13547ab6 | 1722 | |
9018be22 SM |
1723 | template <typename T> |
1724 | gdb::optional<gdb::def_vector<T>> | |
159f81f3 | 1725 | target_read_alloc_1 (struct target_ops *ops, enum target_object object, |
9018be22 | 1726 | const char *annex) |
13547ab6 | 1727 | { |
9018be22 SM |
1728 | gdb::def_vector<T> buf; |
1729 | size_t buf_pos = 0; | |
1730 | const int chunk = 4096; | |
13547ab6 DJ |
1731 | |
1732 | /* This function does not have a length parameter; it reads the | |
1733 | entire OBJECT). Also, it doesn't support objects fetched partly | |
1734 | from one target and partly from another (in a different stratum, | |
1735 | e.g. a core file and an executable). Both reasons make it | |
1736 | unsuitable for reading memory. */ | |
1737 | gdb_assert (object != TARGET_OBJECT_MEMORY); | |
1738 | ||
1739 | /* Start by reading up to 4K at a time. The target will throttle | |
1740 | this number down if necessary. */ | |
13547ab6 DJ |
1741 | while (1) |
1742 | { | |
9b409511 YQ |
1743 | ULONGEST xfered_len; |
1744 | enum target_xfer_status status; | |
1745 | ||
9018be22 SM |
1746 | buf.resize (buf_pos + chunk); |
1747 | ||
1748 | status = target_read_partial (ops, object, annex, | |
1749 | (gdb_byte *) &buf[buf_pos], | |
1750 | buf_pos, chunk, | |
9b409511 YQ |
1751 | &xfered_len); |
1752 | ||
1753 | if (status == TARGET_XFER_EOF) | |
13547ab6 DJ |
1754 | { |
1755 | /* Read all there was. */ | |
9018be22 SM |
1756 | buf.resize (buf_pos); |
1757 | return buf; | |
13547ab6 | 1758 | } |
9b409511 YQ |
1759 | else if (status != TARGET_XFER_OK) |
1760 | { | |
1761 | /* An error occurred. */ | |
9018be22 | 1762 | return {}; |
9b409511 | 1763 | } |
13547ab6 | 1764 | |
9b409511 | 1765 | buf_pos += xfered_len; |
13547ab6 | 1766 | |
13547ab6 DJ |
1767 | QUIT; |
1768 | } | |
1769 | } | |
1770 | ||
9018be22 | 1771 | /* See target.h */ |
159f81f3 | 1772 | |
9018be22 | 1773 | gdb::optional<gdb::byte_vector> |
159f81f3 | 1774 | target_read_alloc (struct target_ops *ops, enum target_object object, |
9018be22 | 1775 | const char *annex) |
159f81f3 | 1776 | { |
9018be22 | 1777 | return target_read_alloc_1<gdb_byte> (ops, object, annex); |
159f81f3 DJ |
1778 | } |
1779 | ||
b7b030ad | 1780 | /* See target.h. */ |
159f81f3 | 1781 | |
9018be22 | 1782 | gdb::optional<gdb::char_vector> |
159f81f3 DJ |
1783 | target_read_stralloc (struct target_ops *ops, enum target_object object, |
1784 | const char *annex) | |
1785 | { | |
9018be22 SM |
1786 | gdb::optional<gdb::char_vector> buf |
1787 | = target_read_alloc_1<char> (ops, object, annex); | |
159f81f3 | 1788 | |
9018be22 SM |
1789 | if (!buf) |
1790 | return {}; | |
159f81f3 | 1791 | |
9018be22 SM |
1792 | if (buf->back () != '\0') |
1793 | buf->push_back ('\0'); | |
7313baad UW |
1794 | |
1795 | /* Check for embedded NUL bytes; but allow trailing NULs. */ | |
9018be22 SM |
1796 | for (auto it = std::find (buf->begin (), buf->end (), '\0'); |
1797 | it != buf->end (); it++) | |
1798 | if (*it != '\0') | |
7313baad UW |
1799 | { |
1800 | warning (_("target object %d, annex %s, " | |
1801 | "contained unexpected null characters"), | |
1802 | (int) object, annex ? annex : "(none)"); | |
1803 | break; | |
1804 | } | |
159f81f3 | 1805 | |
9018be22 | 1806 | return buf; |
159f81f3 DJ |
1807 | } |
1808 | ||
b6591e8b AC |
1809 | /* Memory transfer methods. */ |
1810 | ||
1811 | void | |
1b0ba102 | 1812 | get_target_memory (struct target_ops *ops, CORE_ADDR addr, gdb_byte *buf, |
b6591e8b AC |
1813 | LONGEST len) |
1814 | { | |
07b82ea5 PA |
1815 | /* This method is used to read from an alternate, non-current |
1816 | target. This read must bypass the overlay support (as symbols | |
1817 | don't match this target), and GDB's internal cache (wrong cache | |
1818 | for this target). */ | |
1819 | if (target_read (ops, TARGET_OBJECT_RAW_MEMORY, NULL, buf, addr, len) | |
b6591e8b | 1820 | != len) |
578d3588 | 1821 | memory_error (TARGET_XFER_E_IO, addr); |
b6591e8b AC |
1822 | } |
1823 | ||
1824 | ULONGEST | |
5d502164 MS |
1825 | get_target_memory_unsigned (struct target_ops *ops, CORE_ADDR addr, |
1826 | int len, enum bfd_endian byte_order) | |
b6591e8b | 1827 | { |
f6519ebc | 1828 | gdb_byte buf[sizeof (ULONGEST)]; |
b6591e8b AC |
1829 | |
1830 | gdb_assert (len <= sizeof (buf)); | |
1831 | get_target_memory (ops, addr, buf, len); | |
e17a4113 | 1832 | return extract_unsigned_integer (buf, len, byte_order); |
b6591e8b AC |
1833 | } |
1834 | ||
3db08215 MM |
1835 | /* See target.h. */ |
1836 | ||
d914c394 SS |
1837 | int |
1838 | target_insert_breakpoint (struct gdbarch *gdbarch, | |
1839 | struct bp_target_info *bp_tgt) | |
1840 | { | |
1841 | if (!may_insert_breakpoints) | |
1842 | { | |
1843 | warning (_("May not insert breakpoints")); | |
1844 | return 1; | |
1845 | } | |
1846 | ||
8b88a78e | 1847 | return current_top_target ()->insert_breakpoint (gdbarch, bp_tgt); |
d914c394 SS |
1848 | } |
1849 | ||
3db08215 MM |
1850 | /* See target.h. */ |
1851 | ||
d914c394 | 1852 | int |
6b84065d | 1853 | target_remove_breakpoint (struct gdbarch *gdbarch, |
73971819 PA |
1854 | struct bp_target_info *bp_tgt, |
1855 | enum remove_bp_reason reason) | |
d914c394 SS |
1856 | { |
1857 | /* This is kind of a weird case to handle, but the permission might | |
1858 | have been changed after breakpoints were inserted - in which case | |
1859 | we should just take the user literally and assume that any | |
1860 | breakpoints should be left in place. */ | |
1861 | if (!may_insert_breakpoints) | |
1862 | { | |
1863 | warning (_("May not remove breakpoints")); | |
1864 | return 1; | |
1865 | } | |
1866 | ||
8b88a78e | 1867 | return current_top_target ()->remove_breakpoint (gdbarch, bp_tgt, reason); |
d914c394 SS |
1868 | } |
1869 | ||
c906108c | 1870 | static void |
1d12d88f | 1871 | info_target_command (const char *args, int from_tty) |
c906108c | 1872 | { |
c906108c | 1873 | int has_all_mem = 0; |
c5aa993b | 1874 | |
c906108c | 1875 | if (symfile_objfile != NULL) |
4262abfb JK |
1876 | printf_unfiltered (_("Symbols from \"%s\".\n"), |
1877 | objfile_name (symfile_objfile)); | |
c906108c | 1878 | |
b6a8c27b | 1879 | for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
c906108c | 1880 | { |
f6ac5f3d | 1881 | if (!t->has_memory ()) |
c906108c SS |
1882 | continue; |
1883 | ||
c5aa993b | 1884 | if ((int) (t->to_stratum) <= (int) dummy_stratum) |
c906108c SS |
1885 | continue; |
1886 | if (has_all_mem) | |
3e43a32a MS |
1887 | printf_unfiltered (_("\tWhile running this, " |
1888 | "GDB does not access memory from...\n")); | |
f6ac5f3d PA |
1889 | printf_unfiltered ("%s:\n", t->longname ()); |
1890 | t->files_info (); | |
1891 | has_all_mem = t->has_all_memory (); | |
c906108c SS |
1892 | } |
1893 | } | |
1894 | ||
fd79ecee DJ |
1895 | /* This function is called before any new inferior is created, e.g. |
1896 | by running a program, attaching, or connecting to a target. | |
1897 | It cleans up any state from previous invocations which might | |
1898 | change between runs. This is a subset of what target_preopen | |
1899 | resets (things which might change between targets). */ | |
1900 | ||
1901 | void | |
1902 | target_pre_inferior (int from_tty) | |
1903 | { | |
c378eb4e | 1904 | /* Clear out solib state. Otherwise the solib state of the previous |
b9db4ced | 1905 | inferior might have survived and is entirely wrong for the new |
c378eb4e | 1906 | target. This has been observed on GNU/Linux using glibc 2.3. How |
b9db4ced UW |
1907 | to reproduce: |
1908 | ||
1909 | bash$ ./foo& | |
1910 | [1] 4711 | |
1911 | bash$ ./foo& | |
1912 | [1] 4712 | |
1913 | bash$ gdb ./foo | |
1914 | [...] | |
1915 | (gdb) attach 4711 | |
1916 | (gdb) detach | |
1917 | (gdb) attach 4712 | |
1918 | Cannot access memory at address 0xdeadbeef | |
1919 | */ | |
b9db4ced | 1920 | |
50c71eaf PA |
1921 | /* In some OSs, the shared library list is the same/global/shared |
1922 | across inferiors. If code is shared between processes, so are | |
1923 | memory regions and features. */ | |
f5656ead | 1924 | if (!gdbarch_has_global_solist (target_gdbarch ())) |
50c71eaf PA |
1925 | { |
1926 | no_shared_libraries (NULL, from_tty); | |
1927 | ||
1928 | invalidate_target_mem_regions (); | |
424163ea | 1929 | |
50c71eaf PA |
1930 | target_clear_description (); |
1931 | } | |
8ffcbaaf | 1932 | |
e9756d52 PP |
1933 | /* attach_flag may be set if the previous process associated with |
1934 | the inferior was attached to. */ | |
1935 | current_inferior ()->attach_flag = 0; | |
1936 | ||
5d5658a1 PA |
1937 | current_inferior ()->highest_thread_num = 0; |
1938 | ||
8ffcbaaf | 1939 | agent_capability_invalidate (); |
fd79ecee DJ |
1940 | } |
1941 | ||
b8fa0bfa PA |
1942 | /* Callback for iterate_over_inferiors. Gets rid of the given |
1943 | inferior. */ | |
1944 | ||
1945 | static int | |
1946 | dispose_inferior (struct inferior *inf, void *args) | |
1947 | { | |
9d4a934c AB |
1948 | /* Not all killed inferiors can, or will ever be, removed from the |
1949 | inferior list. Killed inferiors clearly don't need to be killed | |
1950 | again, so, we're done. */ | |
1951 | if (inf->pid == 0) | |
1952 | return 0; | |
1953 | ||
00431a78 PA |
1954 | thread_info *thread = any_thread_of_inferior (inf); |
1955 | if (thread != NULL) | |
b8fa0bfa | 1956 | { |
00431a78 | 1957 | switch_to_thread (thread); |
b8fa0bfa PA |
1958 | |
1959 | /* Core inferiors actually should be detached, not killed. */ | |
1960 | if (target_has_execution) | |
1961 | target_kill (); | |
1962 | else | |
6e1e1966 | 1963 | target_detach (inf, 0); |
b8fa0bfa PA |
1964 | } |
1965 | ||
1966 | return 0; | |
1967 | } | |
1968 | ||
c906108c SS |
1969 | /* This is to be called by the open routine before it does |
1970 | anything. */ | |
1971 | ||
1972 | void | |
fba45db2 | 1973 | target_preopen (int from_tty) |
c906108c | 1974 | { |
c5aa993b | 1975 | dont_repeat (); |
c906108c | 1976 | |
b8fa0bfa | 1977 | if (have_inferiors ()) |
c5aa993b | 1978 | { |
adf40b2e | 1979 | if (!from_tty |
b8fa0bfa PA |
1980 | || !have_live_inferiors () |
1981 | || query (_("A program is being debugged already. Kill it? "))) | |
1982 | iterate_over_inferiors (dispose_inferior, NULL); | |
c906108c | 1983 | else |
8a3fe4f8 | 1984 | error (_("Program not killed.")); |
c906108c SS |
1985 | } |
1986 | ||
1987 | /* Calling target_kill may remove the target from the stack. But if | |
1988 | it doesn't (which seems like a win for UDI), remove it now. */ | |
87ab71f0 PA |
1989 | /* Leave the exec target, though. The user may be switching from a |
1990 | live process to a core of the same program. */ | |
460014f5 | 1991 | pop_all_targets_above (file_stratum); |
fd79ecee DJ |
1992 | |
1993 | target_pre_inferior (from_tty); | |
c906108c SS |
1994 | } |
1995 | ||
6bd6f3b6 | 1996 | /* See target.h. */ |
c906108c SS |
1997 | |
1998 | void | |
6e1e1966 | 1999 | target_detach (inferior *inf, int from_tty) |
c906108c | 2000 | { |
6e1e1966 SM |
2001 | /* As long as some to_detach implementations rely on the current_inferior |
2002 | (either directly, or indirectly, like through target_gdbarch or by | |
2003 | reading memory), INF needs to be the current inferior. When that | |
2004 | requirement will become no longer true, then we can remove this | |
2005 | assertion. */ | |
2006 | gdb_assert (inf == current_inferior ()); | |
2007 | ||
f5656ead | 2008 | if (gdbarch_has_global_breakpoints (target_gdbarch ())) |
50c71eaf PA |
2009 | /* Don't remove global breakpoints here. They're removed on |
2010 | disconnection from the target. */ | |
2011 | ; | |
2012 | else | |
2013 | /* If we're in breakpoints-always-inserted mode, have to remove | |
00431a78 PA |
2014 | breakpoints before detaching. */ |
2015 | remove_breakpoints_inf (current_inferior ()); | |
74960c60 | 2016 | |
24291992 PA |
2017 | prepare_for_detach (); |
2018 | ||
8b88a78e | 2019 | current_top_target ()->detach (inf, from_tty); |
c906108c SS |
2020 | } |
2021 | ||
6ad8ae5c | 2022 | void |
fee354ee | 2023 | target_disconnect (const char *args, int from_tty) |
6ad8ae5c | 2024 | { |
50c71eaf PA |
2025 | /* If we're in breakpoints-always-inserted mode or if breakpoints |
2026 | are global across processes, we have to remove them before | |
2027 | disconnecting. */ | |
74960c60 VP |
2028 | remove_breakpoints (); |
2029 | ||
8b88a78e | 2030 | current_top_target ()->disconnect (args, from_tty); |
6ad8ae5c DJ |
2031 | } |
2032 | ||
f2b9e3df SDJ |
2033 | /* See target/target.h. */ |
2034 | ||
117de6a9 | 2035 | ptid_t |
47608cb1 | 2036 | target_wait (ptid_t ptid, struct target_waitstatus *status, int options) |
117de6a9 | 2037 | { |
8b88a78e | 2038 | return current_top_target ()->wait (ptid, status, options); |
117de6a9 PA |
2039 | } |
2040 | ||
0b333c5e PA |
2041 | /* See target.h. */ |
2042 | ||
2043 | ptid_t | |
2044 | default_target_wait (struct target_ops *ops, | |
2045 | ptid_t ptid, struct target_waitstatus *status, | |
2046 | int options) | |
2047 | { | |
2048 | status->kind = TARGET_WAITKIND_IGNORE; | |
2049 | return minus_one_ptid; | |
2050 | } | |
2051 | ||
7a114964 | 2052 | const char * |
117de6a9 PA |
2053 | target_pid_to_str (ptid_t ptid) |
2054 | { | |
8b88a78e | 2055 | return current_top_target ()->pid_to_str (ptid); |
117de6a9 PA |
2056 | } |
2057 | ||
73ede765 | 2058 | const char * |
4694da01 TT |
2059 | target_thread_name (struct thread_info *info) |
2060 | { | |
8b88a78e | 2061 | return current_top_target ()->thread_name (info); |
4694da01 TT |
2062 | } |
2063 | ||
e04ee09e KB |
2064 | struct thread_info * |
2065 | target_thread_handle_to_thread_info (const gdb_byte *thread_handle, | |
2066 | int handle_len, | |
2067 | struct inferior *inf) | |
2068 | { | |
8b88a78e | 2069 | return current_top_target ()->thread_handle_to_thread_info (thread_handle, |
f6ac5f3d | 2070 | handle_len, inf); |
e04ee09e KB |
2071 | } |
2072 | ||
e1ac3328 | 2073 | void |
2ea28649 | 2074 | target_resume (ptid_t ptid, int step, enum gdb_signal signal) |
e1ac3328 | 2075 | { |
4e5d721f | 2076 | target_dcache_invalidate (); |
28439f5e | 2077 | |
8b88a78e | 2078 | current_top_target ()->resume (ptid, step, signal); |
28439f5e | 2079 | |
6b84065d | 2080 | registers_changed_ptid (ptid); |
251bde03 | 2081 | /* We only set the internal executing state here. The user/frontend |
f2ffa92b PA |
2082 | running state is set at a higher level. This also clears the |
2083 | thread's stop_pc as side effect. */ | |
6b84065d | 2084 | set_executing (ptid, 1); |
6b84065d | 2085 | clear_inline_frame_state (ptid); |
e1ac3328 | 2086 | } |
2455069d | 2087 | |
85ad3aaf PA |
2088 | /* If true, target_commit_resume is a nop. */ |
2089 | static int defer_target_commit_resume; | |
2090 | ||
2091 | /* See target.h. */ | |
2092 | ||
2093 | void | |
2094 | target_commit_resume (void) | |
2095 | { | |
85ad3aaf PA |
2096 | if (defer_target_commit_resume) |
2097 | return; | |
2098 | ||
8b88a78e | 2099 | current_top_target ()->commit_resume (); |
85ad3aaf PA |
2100 | } |
2101 | ||
2102 | /* See target.h. */ | |
2103 | ||
a9bc57b9 TT |
2104 | scoped_restore_tmpl<int> |
2105 | make_scoped_defer_target_commit_resume () | |
85ad3aaf | 2106 | { |
a9bc57b9 | 2107 | return make_scoped_restore (&defer_target_commit_resume, 1); |
85ad3aaf PA |
2108 | } |
2109 | ||
2455069d UW |
2110 | void |
2111 | target_pass_signals (int numsigs, unsigned char *pass_signals) | |
2112 | { | |
8b88a78e | 2113 | current_top_target ()->pass_signals (numsigs, pass_signals); |
2455069d UW |
2114 | } |
2115 | ||
9b224c5e PA |
2116 | void |
2117 | target_program_signals (int numsigs, unsigned char *program_signals) | |
2118 | { | |
8b88a78e | 2119 | current_top_target ()->program_signals (numsigs, program_signals); |
9b224c5e PA |
2120 | } |
2121 | ||
098dba18 TT |
2122 | static int |
2123 | default_follow_fork (struct target_ops *self, int follow_child, | |
2124 | int detach_fork) | |
2125 | { | |
2126 | /* Some target returned a fork event, but did not know how to follow it. */ | |
2127 | internal_error (__FILE__, __LINE__, | |
2128 | _("could not find a target to follow fork")); | |
2129 | } | |
2130 | ||
ee057212 DJ |
2131 | /* Look through the list of possible targets for a target that can |
2132 | follow forks. */ | |
2133 | ||
2134 | int | |
07107ca6 | 2135 | target_follow_fork (int follow_child, int detach_fork) |
ee057212 | 2136 | { |
8b88a78e | 2137 | return current_top_target ()->follow_fork (follow_child, detach_fork); |
ee057212 DJ |
2138 | } |
2139 | ||
94585166 DB |
2140 | /* Target wrapper for follow exec hook. */ |
2141 | ||
2142 | void | |
2143 | target_follow_exec (struct inferior *inf, char *execd_pathname) | |
2144 | { | |
8b88a78e | 2145 | current_top_target ()->follow_exec (inf, execd_pathname); |
94585166 DB |
2146 | } |
2147 | ||
8d657035 TT |
2148 | static void |
2149 | default_mourn_inferior (struct target_ops *self) | |
2150 | { | |
2151 | internal_error (__FILE__, __LINE__, | |
2152 | _("could not find a target to follow mourn inferior")); | |
2153 | } | |
2154 | ||
136d6dae | 2155 | void |
bc1e6c81 | 2156 | target_mourn_inferior (ptid_t ptid) |
136d6dae | 2157 | { |
d7e15655 | 2158 | gdb_assert (ptid == inferior_ptid); |
8b88a78e | 2159 | current_top_target ()->mourn_inferior (); |
136d6dae | 2160 | |
8d657035 TT |
2161 | /* We no longer need to keep handles on any of the object files. |
2162 | Make sure to release them to avoid unnecessarily locking any | |
2163 | of them while we're not actually debugging. */ | |
2164 | bfd_cache_close_all (); | |
136d6dae VP |
2165 | } |
2166 | ||
424163ea DJ |
2167 | /* Look for a target which can describe architectural features, starting |
2168 | from TARGET. If we find one, return its description. */ | |
2169 | ||
2170 | const struct target_desc * | |
2171 | target_read_description (struct target_ops *target) | |
2172 | { | |
f6ac5f3d | 2173 | return target->read_description (); |
424163ea DJ |
2174 | } |
2175 | ||
58a5184e | 2176 | /* This implements a basic search of memory, reading target memory and |
08388c79 DE |
2177 | performing the search here (as opposed to performing the search in on the |
2178 | target side with, for example, gdbserver). */ | |
2179 | ||
2180 | int | |
2181 | simple_search_memory (struct target_ops *ops, | |
2182 | CORE_ADDR start_addr, ULONGEST search_space_len, | |
2183 | const gdb_byte *pattern, ULONGEST pattern_len, | |
2184 | CORE_ADDR *found_addrp) | |
2185 | { | |
2186 | /* NOTE: also defined in find.c testcase. */ | |
2187 | #define SEARCH_CHUNK_SIZE 16000 | |
2188 | const unsigned chunk_size = SEARCH_CHUNK_SIZE; | |
2189 | /* Buffer to hold memory contents for searching. */ | |
08388c79 | 2190 | unsigned search_buf_size; |
08388c79 DE |
2191 | |
2192 | search_buf_size = chunk_size + pattern_len - 1; | |
2193 | ||
2194 | /* No point in trying to allocate a buffer larger than the search space. */ | |
2195 | if (search_space_len < search_buf_size) | |
2196 | search_buf_size = search_space_len; | |
2197 | ||
26fcd5d7 | 2198 | gdb::byte_vector search_buf (search_buf_size); |
08388c79 DE |
2199 | |
2200 | /* Prime the search buffer. */ | |
2201 | ||
2202 | if (target_read (ops, TARGET_OBJECT_MEMORY, NULL, | |
26fcd5d7 TT |
2203 | search_buf.data (), start_addr, search_buf_size) |
2204 | != search_buf_size) | |
08388c79 | 2205 | { |
b3dc46ff AB |
2206 | warning (_("Unable to access %s bytes of target " |
2207 | "memory at %s, halting search."), | |
2208 | pulongest (search_buf_size), hex_string (start_addr)); | |
08388c79 DE |
2209 | return -1; |
2210 | } | |
2211 | ||
2212 | /* Perform the search. | |
2213 | ||
2214 | The loop is kept simple by allocating [N + pattern-length - 1] bytes. | |
2215 | When we've scanned N bytes we copy the trailing bytes to the start and | |
2216 | read in another N bytes. */ | |
2217 | ||
2218 | while (search_space_len >= pattern_len) | |
2219 | { | |
2220 | gdb_byte *found_ptr; | |
325fac50 PA |
2221 | unsigned nr_search_bytes |
2222 | = std::min (search_space_len, (ULONGEST) search_buf_size); | |
08388c79 | 2223 | |
26fcd5d7 | 2224 | found_ptr = (gdb_byte *) memmem (search_buf.data (), nr_search_bytes, |
d7f3ff3e | 2225 | pattern, pattern_len); |
08388c79 DE |
2226 | |
2227 | if (found_ptr != NULL) | |
2228 | { | |
26fcd5d7 | 2229 | CORE_ADDR found_addr = start_addr + (found_ptr - search_buf.data ()); |
5d502164 | 2230 | |
08388c79 | 2231 | *found_addrp = found_addr; |
08388c79 DE |
2232 | return 1; |
2233 | } | |
2234 | ||
2235 | /* Not found in this chunk, skip to next chunk. */ | |
2236 | ||
2237 | /* Don't let search_space_len wrap here, it's unsigned. */ | |
2238 | if (search_space_len >= chunk_size) | |
2239 | search_space_len -= chunk_size; | |
2240 | else | |
2241 | search_space_len = 0; | |
2242 | ||
2243 | if (search_space_len >= pattern_len) | |
2244 | { | |
2245 | unsigned keep_len = search_buf_size - chunk_size; | |
8a35fb51 | 2246 | CORE_ADDR read_addr = start_addr + chunk_size + keep_len; |
08388c79 DE |
2247 | int nr_to_read; |
2248 | ||
2249 | /* Copy the trailing part of the previous iteration to the front | |
2250 | of the buffer for the next iteration. */ | |
2251 | gdb_assert (keep_len == pattern_len - 1); | |
26fcd5d7 | 2252 | memcpy (&search_buf[0], &search_buf[chunk_size], keep_len); |
08388c79 | 2253 | |
325fac50 PA |
2254 | nr_to_read = std::min (search_space_len - keep_len, |
2255 | (ULONGEST) chunk_size); | |
08388c79 DE |
2256 | |
2257 | if (target_read (ops, TARGET_OBJECT_MEMORY, NULL, | |
26fcd5d7 | 2258 | &search_buf[keep_len], read_addr, |
08388c79 DE |
2259 | nr_to_read) != nr_to_read) |
2260 | { | |
b3dc46ff | 2261 | warning (_("Unable to access %s bytes of target " |
9b20d036 | 2262 | "memory at %s, halting search."), |
b3dc46ff | 2263 | plongest (nr_to_read), |
08388c79 | 2264 | hex_string (read_addr)); |
08388c79 DE |
2265 | return -1; |
2266 | } | |
2267 | ||
2268 | start_addr += chunk_size; | |
2269 | } | |
2270 | } | |
2271 | ||
2272 | /* Not found. */ | |
2273 | ||
08388c79 DE |
2274 | return 0; |
2275 | } | |
2276 | ||
58a5184e TT |
2277 | /* Default implementation of memory-searching. */ |
2278 | ||
2279 | static int | |
2280 | default_search_memory (struct target_ops *self, | |
2281 | CORE_ADDR start_addr, ULONGEST search_space_len, | |
2282 | const gdb_byte *pattern, ULONGEST pattern_len, | |
2283 | CORE_ADDR *found_addrp) | |
2284 | { | |
2285 | /* Start over from the top of the target stack. */ | |
8b88a78e | 2286 | return simple_search_memory (current_top_target (), |
58a5184e TT |
2287 | start_addr, search_space_len, |
2288 | pattern, pattern_len, found_addrp); | |
2289 | } | |
2290 | ||
08388c79 DE |
2291 | /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the |
2292 | sequence of bytes in PATTERN with length PATTERN_LEN. | |
2293 | ||
2294 | The result is 1 if found, 0 if not found, and -1 if there was an error | |
2295 | requiring halting of the search (e.g. memory read error). | |
2296 | If the pattern is found the address is recorded in FOUND_ADDRP. */ | |
2297 | ||
2298 | int | |
2299 | target_search_memory (CORE_ADDR start_addr, ULONGEST search_space_len, | |
2300 | const gdb_byte *pattern, ULONGEST pattern_len, | |
2301 | CORE_ADDR *found_addrp) | |
2302 | { | |
8b88a78e | 2303 | return current_top_target ()->search_memory (start_addr, search_space_len, |
f6ac5f3d | 2304 | pattern, pattern_len, found_addrp); |
08388c79 DE |
2305 | } |
2306 | ||
8edfe269 DJ |
2307 | /* Look through the currently pushed targets. If none of them will |
2308 | be able to restart the currently running process, issue an error | |
2309 | message. */ | |
2310 | ||
2311 | void | |
2312 | target_require_runnable (void) | |
2313 | { | |
b6a8c27b | 2314 | for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
8edfe269 DJ |
2315 | { |
2316 | /* If this target knows how to create a new program, then | |
2317 | assume we will still be able to after killing the current | |
2318 | one. Either killing and mourning will not pop T, or else | |
2319 | find_default_run_target will find it again. */ | |
f6ac5f3d | 2320 | if (t->can_create_inferior ()) |
8edfe269 DJ |
2321 | return; |
2322 | ||
548740d6 | 2323 | /* Do not worry about targets at certain strata that can not |
8edfe269 DJ |
2324 | create inferiors. Assume they will be pushed again if |
2325 | necessary, and continue to the process_stratum. */ | |
f6ac5f3d | 2326 | if (t->to_stratum > process_stratum) |
8edfe269 DJ |
2327 | continue; |
2328 | ||
3e43a32a MS |
2329 | error (_("The \"%s\" target does not support \"run\". " |
2330 | "Try \"help target\" or \"continue\"."), | |
f6ac5f3d | 2331 | t->shortname ()); |
8edfe269 DJ |
2332 | } |
2333 | ||
2334 | /* This function is only called if the target is running. In that | |
2335 | case there should have been a process_stratum target and it | |
c378eb4e | 2336 | should either know how to create inferiors, or not... */ |
9b20d036 | 2337 | internal_error (__FILE__, __LINE__, _("No targets found")); |
8edfe269 DJ |
2338 | } |
2339 | ||
6a3cb8e8 PA |
2340 | /* Whether GDB is allowed to fall back to the default run target for |
2341 | "run", "attach", etc. when no target is connected yet. */ | |
2342 | static int auto_connect_native_target = 1; | |
2343 | ||
2344 | static void | |
2345 | show_auto_connect_native_target (struct ui_file *file, int from_tty, | |
2346 | struct cmd_list_element *c, const char *value) | |
2347 | { | |
2348 | fprintf_filtered (file, | |
2349 | _("Whether GDB may automatically connect to the " | |
2350 | "native target is %s.\n"), | |
2351 | value); | |
2352 | } | |
2353 | ||
d9f719f1 PA |
2354 | /* A pointer to the target that can respond to "run" or "attach". |
2355 | Native targets are always singletons and instantiated early at GDB | |
2356 | startup. */ | |
2357 | static target_ops *the_native_target; | |
2358 | ||
2359 | /* See target.h. */ | |
2360 | ||
2361 | void | |
2362 | set_native_target (target_ops *target) | |
2363 | { | |
2364 | if (the_native_target != NULL) | |
2365 | internal_error (__FILE__, __LINE__, | |
2366 | _("native target already set (\"%s\")."), | |
2367 | the_native_target->longname ()); | |
2368 | ||
2369 | the_native_target = target; | |
2370 | } | |
2371 | ||
2372 | /* See target.h. */ | |
2373 | ||
2374 | target_ops * | |
2375 | get_native_target () | |
2376 | { | |
2377 | return the_native_target; | |
2378 | } | |
2379 | ||
c906108c SS |
2380 | /* Look through the list of possible targets for a target that can |
2381 | execute a run or attach command without any other data. This is | |
2382 | used to locate the default process stratum. | |
2383 | ||
5f667f2d PA |
2384 | If DO_MESG is not NULL, the result is always valid (error() is |
2385 | called for errors); else, return NULL on error. */ | |
c906108c SS |
2386 | |
2387 | static struct target_ops * | |
a121b7c1 | 2388 | find_default_run_target (const char *do_mesg) |
c906108c | 2389 | { |
d9f719f1 PA |
2390 | if (auto_connect_native_target && the_native_target != NULL) |
2391 | return the_native_target; | |
c906108c | 2392 | |
d9f719f1 PA |
2393 | if (do_mesg != NULL) |
2394 | error (_("Don't know how to %s. Try \"help target\"."), do_mesg); | |
2395 | return NULL; | |
c906108c SS |
2396 | } |
2397 | ||
b3ccfe11 | 2398 | /* See target.h. */ |
c906108c | 2399 | |
b3ccfe11 TT |
2400 | struct target_ops * |
2401 | find_attach_target (void) | |
c906108c | 2402 | { |
b3ccfe11 | 2403 | /* If a target on the current stack can attach, use it. */ |
b6a8c27b | 2404 | for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
b3ccfe11 | 2405 | { |
f6ac5f3d | 2406 | if (t->can_attach ()) |
d9f719f1 | 2407 | return t; |
b3ccfe11 | 2408 | } |
c906108c | 2409 | |
b3ccfe11 | 2410 | /* Otherwise, use the default run target for attaching. */ |
d9f719f1 | 2411 | return find_default_run_target ("attach"); |
b84876c2 PA |
2412 | } |
2413 | ||
b3ccfe11 | 2414 | /* See target.h. */ |
b84876c2 | 2415 | |
b3ccfe11 TT |
2416 | struct target_ops * |
2417 | find_run_target (void) | |
9908b566 | 2418 | { |
f6ac5f3d | 2419 | /* If a target on the current stack can run, use it. */ |
b6a8c27b | 2420 | for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
b3ccfe11 | 2421 | { |
f6ac5f3d | 2422 | if (t->can_create_inferior ()) |
d9f719f1 | 2423 | return t; |
b3ccfe11 | 2424 | } |
5d502164 | 2425 | |
b3ccfe11 | 2426 | /* Otherwise, use the default run target. */ |
d9f719f1 | 2427 | return find_default_run_target ("run"); |
9908b566 VP |
2428 | } |
2429 | ||
f6ac5f3d PA |
2430 | bool |
2431 | target_ops::info_proc (const char *args, enum info_proc_what what) | |
2432 | { | |
2433 | return false; | |
2434 | } | |
2435 | ||
145b16a9 UW |
2436 | /* Implement the "info proc" command. */ |
2437 | ||
451b7c33 | 2438 | int |
7bc112c1 | 2439 | target_info_proc (const char *args, enum info_proc_what what) |
145b16a9 UW |
2440 | { |
2441 | struct target_ops *t; | |
2442 | ||
2443 | /* If we're already connected to something that can get us OS | |
2444 | related data, use it. Otherwise, try using the native | |
2445 | target. */ | |
f6ac5f3d PA |
2446 | t = find_target_at (process_stratum); |
2447 | if (t == NULL) | |
145b16a9 UW |
2448 | t = find_default_run_target (NULL); |
2449 | ||
b6a8c27b | 2450 | for (; t != NULL; t = t->beneath ()) |
145b16a9 | 2451 | { |
f6ac5f3d | 2452 | if (t->info_proc (args, what)) |
145b16a9 | 2453 | { |
145b16a9 UW |
2454 | if (targetdebug) |
2455 | fprintf_unfiltered (gdb_stdlog, | |
2456 | "target_info_proc (\"%s\", %d)\n", args, what); | |
2457 | ||
451b7c33 | 2458 | return 1; |
145b16a9 UW |
2459 | } |
2460 | } | |
2461 | ||
451b7c33 | 2462 | return 0; |
145b16a9 UW |
2463 | } |
2464 | ||
03583c20 | 2465 | static int |
2bfc0540 | 2466 | find_default_supports_disable_randomization (struct target_ops *self) |
03583c20 UW |
2467 | { |
2468 | struct target_ops *t; | |
2469 | ||
2470 | t = find_default_run_target (NULL); | |
f6ac5f3d PA |
2471 | if (t != NULL) |
2472 | return t->supports_disable_randomization (); | |
03583c20 UW |
2473 | return 0; |
2474 | } | |
2475 | ||
2476 | int | |
2477 | target_supports_disable_randomization (void) | |
2478 | { | |
8b88a78e | 2479 | return current_top_target ()->supports_disable_randomization (); |
03583c20 | 2480 | } |
9908b566 | 2481 | |
1fb77080 SDJ |
2482 | /* See target/target.h. */ |
2483 | ||
2484 | int | |
2485 | target_supports_multi_process (void) | |
2486 | { | |
8b88a78e | 2487 | return current_top_target ()->supports_multi_process (); |
1fb77080 SDJ |
2488 | } |
2489 | ||
b7b030ad TT |
2490 | /* See target.h. */ |
2491 | ||
9018be22 | 2492 | gdb::optional<gdb::char_vector> |
07e059b5 VP |
2493 | target_get_osdata (const char *type) |
2494 | { | |
07e059b5 VP |
2495 | struct target_ops *t; |
2496 | ||
739ef7fb PA |
2497 | /* If we're already connected to something that can get us OS |
2498 | related data, use it. Otherwise, try using the native | |
2499 | target. */ | |
f6ac5f3d PA |
2500 | t = find_target_at (process_stratum); |
2501 | if (t == NULL) | |
739ef7fb | 2502 | t = find_default_run_target ("get OS data"); |
07e059b5 VP |
2503 | |
2504 | if (!t) | |
9018be22 | 2505 | return {}; |
07e059b5 | 2506 | |
6d097e65 | 2507 | return target_read_stralloc (t, TARGET_OBJECT_OSDATA, type); |
07e059b5 VP |
2508 | } |
2509 | ||
6c95b8df | 2510 | |
8eaff7cd TT |
2511 | /* Determine the current address space of thread PTID. */ |
2512 | ||
2513 | struct address_space * | |
2514 | target_thread_address_space (ptid_t ptid) | |
2515 | { | |
2516 | struct address_space *aspace; | |
2517 | ||
8b88a78e | 2518 | aspace = current_top_target ()->thread_address_space (ptid); |
8eaff7cd TT |
2519 | gdb_assert (aspace != NULL); |
2520 | ||
8eaff7cd TT |
2521 | return aspace; |
2522 | } | |
2523 | ||
b6a8c27b PA |
2524 | /* See target.h. */ |
2525 | ||
2526 | target_ops * | |
2527 | target_ops::beneath () const | |
2528 | { | |
a1740ee1 | 2529 | return g_target_stack.find_beneath (this); |
b6a8c27b PA |
2530 | } |
2531 | ||
f6ac5f3d PA |
2532 | void |
2533 | target_ops::close () | |
2534 | { | |
2535 | } | |
2536 | ||
2537 | bool | |
2538 | target_ops::can_attach () | |
2539 | { | |
2540 | return 0; | |
2541 | } | |
2542 | ||
2543 | void | |
2544 | target_ops::attach (const char *, int) | |
2545 | { | |
2546 | gdb_assert_not_reached ("target_ops::attach called"); | |
2547 | } | |
2548 | ||
2549 | bool | |
2550 | target_ops::can_create_inferior () | |
2551 | { | |
2552 | return 0; | |
2553 | } | |
2554 | ||
2555 | void | |
2556 | target_ops::create_inferior (const char *, const std::string &, | |
2557 | char **, int) | |
2558 | { | |
2559 | gdb_assert_not_reached ("target_ops::create_inferior called"); | |
2560 | } | |
2561 | ||
57810aa7 | 2562 | bool |
f6ac5f3d PA |
2563 | target_ops::can_run () |
2564 | { | |
57810aa7 | 2565 | return false; |
f6ac5f3d PA |
2566 | } |
2567 | ||
2568 | int | |
2569 | target_can_run () | |
2570 | { | |
b6a8c27b | 2571 | for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
f6ac5f3d PA |
2572 | { |
2573 | if (t->can_run ()) | |
2574 | return 1; | |
2575 | } | |
2576 | ||
2577 | return 0; | |
2578 | } | |
7313baad UW |
2579 | |
2580 | /* Target file operations. */ | |
2581 | ||
2582 | static struct target_ops * | |
2583 | default_fileio_target (void) | |
2584 | { | |
f6ac5f3d PA |
2585 | struct target_ops *t; |
2586 | ||
7313baad UW |
2587 | /* If we're already connected to something that can perform |
2588 | file I/O, use it. Otherwise, try using the native target. */ | |
f6ac5f3d PA |
2589 | t = find_target_at (process_stratum); |
2590 | if (t != NULL) | |
2591 | return t; | |
2592 | return find_default_run_target ("file I/O"); | |
7313baad UW |
2593 | } |
2594 | ||
1c4b552b GB |
2595 | /* File handle for target file operations. */ |
2596 | ||
5ff79300 | 2597 | struct fileio_fh_t |
1c4b552b | 2598 | { |
20db9c52 PA |
2599 | /* The target on which this file is open. NULL if the target is |
2600 | meanwhile closed while the handle is open. */ | |
5ff79300 | 2601 | target_ops *target; |
1c4b552b GB |
2602 | |
2603 | /* The file descriptor on the target. */ | |
5ff79300 | 2604 | int target_fd; |
1c4b552b | 2605 | |
5ff79300 PA |
2606 | /* Check whether this fileio_fh_t represents a closed file. */ |
2607 | bool is_closed () | |
2608 | { | |
2609 | return target_fd < 0; | |
2610 | } | |
2611 | }; | |
1c4b552b GB |
2612 | |
2613 | /* Vector of currently open file handles. The value returned by | |
2614 | target_fileio_open and passed as the FD argument to other | |
2615 | target_fileio_* functions is an index into this vector. This | |
2616 | vector's entries are never freed; instead, files are marked as | |
2617 | closed, and the handle becomes available for reuse. */ | |
5ff79300 | 2618 | static std::vector<fileio_fh_t> fileio_fhandles; |
1c4b552b GB |
2619 | |
2620 | /* Index into fileio_fhandles of the lowest handle that might be | |
2621 | closed. This permits handle reuse without searching the whole | |
2622 | list each time a new file is opened. */ | |
2623 | static int lowest_closed_fd; | |
2624 | ||
20db9c52 PA |
2625 | /* Invalidate the target associated with open handles that were open |
2626 | on target TARG, since we're about to close (and maybe destroy) the | |
2627 | target. The handles remain open from the client's perspective, but | |
2628 | trying to do anything with them other than closing them will fail | |
2629 | with EIO. */ | |
2630 | ||
2631 | static void | |
2632 | fileio_handles_invalidate_target (target_ops *targ) | |
2633 | { | |
2634 | for (fileio_fh_t &fh : fileio_fhandles) | |
2635 | if (fh.target == targ) | |
2636 | fh.target = NULL; | |
2637 | } | |
2638 | ||
1c4b552b GB |
2639 | /* Acquire a target fileio file descriptor. */ |
2640 | ||
2641 | static int | |
5ff79300 | 2642 | acquire_fileio_fd (target_ops *target, int target_fd) |
1c4b552b | 2643 | { |
1c4b552b | 2644 | /* Search for closed handles to reuse. */ |
5ff79300 PA |
2645 | for (; lowest_closed_fd < fileio_fhandles.size (); lowest_closed_fd++) |
2646 | { | |
2647 | fileio_fh_t &fh = fileio_fhandles[lowest_closed_fd]; | |
2648 | ||
2649 | if (fh.is_closed ()) | |
2650 | break; | |
2651 | } | |
1c4b552b GB |
2652 | |
2653 | /* Push a new handle if no closed handles were found. */ | |
5ff79300 PA |
2654 | if (lowest_closed_fd == fileio_fhandles.size ()) |
2655 | fileio_fhandles.push_back (fileio_fh_t {target, target_fd}); | |
2656 | else | |
2657 | fileio_fhandles[lowest_closed_fd] = {target, target_fd}; | |
1c4b552b | 2658 | |
5ff79300 PA |
2659 | /* Should no longer be marked closed. */ |
2660 | gdb_assert (!fileio_fhandles[lowest_closed_fd].is_closed ()); | |
1c4b552b GB |
2661 | |
2662 | /* Return its index, and start the next lookup at | |
2663 | the next index. */ | |
2664 | return lowest_closed_fd++; | |
2665 | } | |
2666 | ||
2667 | /* Release a target fileio file descriptor. */ | |
2668 | ||
2669 | static void | |
2670 | release_fileio_fd (int fd, fileio_fh_t *fh) | |
2671 | { | |
5ff79300 | 2672 | fh->target_fd = -1; |
325fac50 | 2673 | lowest_closed_fd = std::min (lowest_closed_fd, fd); |
1c4b552b GB |
2674 | } |
2675 | ||
2676 | /* Return a pointer to the fileio_fhandle_t corresponding to FD. */ | |
2677 | ||
5ff79300 PA |
2678 | static fileio_fh_t * |
2679 | fileio_fd_to_fh (int fd) | |
2680 | { | |
2681 | return &fileio_fhandles[fd]; | |
2682 | } | |
1c4b552b | 2683 | |
f6ac5f3d PA |
2684 | |
2685 | /* Default implementations of file i/o methods. We don't want these | |
2686 | to delegate automatically, because we need to know which target | |
2687 | supported the method, in order to call it directly from within | |
2688 | pread/pwrite, etc. */ | |
2689 | ||
2690 | int | |
2691 | target_ops::fileio_open (struct inferior *inf, const char *filename, | |
2692 | int flags, int mode, int warn_if_slow, | |
2693 | int *target_errno) | |
2694 | { | |
2695 | *target_errno = FILEIO_ENOSYS; | |
2696 | return -1; | |
2697 | } | |
2698 | ||
2699 | int | |
2700 | target_ops::fileio_pwrite (int fd, const gdb_byte *write_buf, int len, | |
2701 | ULONGEST offset, int *target_errno) | |
2702 | { | |
2703 | *target_errno = FILEIO_ENOSYS; | |
2704 | return -1; | |
2705 | } | |
2706 | ||
2707 | int | |
2708 | target_ops::fileio_pread (int fd, gdb_byte *read_buf, int len, | |
2709 | ULONGEST offset, int *target_errno) | |
2710 | { | |
2711 | *target_errno = FILEIO_ENOSYS; | |
2712 | return -1; | |
2713 | } | |
2714 | ||
2715 | int | |
2716 | target_ops::fileio_fstat (int fd, struct stat *sb, int *target_errno) | |
2717 | { | |
2718 | *target_errno = FILEIO_ENOSYS; | |
2719 | return -1; | |
2720 | } | |
2721 | ||
2722 | int | |
2723 | target_ops::fileio_close (int fd, int *target_errno) | |
2724 | { | |
2725 | *target_errno = FILEIO_ENOSYS; | |
2726 | return -1; | |
2727 | } | |
2728 | ||
2729 | int | |
2730 | target_ops::fileio_unlink (struct inferior *inf, const char *filename, | |
2731 | int *target_errno) | |
2732 | { | |
2733 | *target_errno = FILEIO_ENOSYS; | |
2734 | return -1; | |
2735 | } | |
2736 | ||
2737 | gdb::optional<std::string> | |
2738 | target_ops::fileio_readlink (struct inferior *inf, const char *filename, | |
2739 | int *target_errno) | |
2740 | { | |
2741 | *target_errno = FILEIO_ENOSYS; | |
2742 | return {}; | |
2743 | } | |
2744 | ||
4313b8c0 GB |
2745 | /* Helper for target_fileio_open and |
2746 | target_fileio_open_warn_if_slow. */ | |
12e2a5fd | 2747 | |
4313b8c0 GB |
2748 | static int |
2749 | target_fileio_open_1 (struct inferior *inf, const char *filename, | |
2750 | int flags, int mode, int warn_if_slow, | |
2751 | int *target_errno) | |
7313baad | 2752 | { |
b6a8c27b | 2753 | for (target_ops *t = default_fileio_target (); t != NULL; t = t->beneath ()) |
7313baad | 2754 | { |
f6ac5f3d PA |
2755 | int fd = t->fileio_open (inf, filename, flags, mode, |
2756 | warn_if_slow, target_errno); | |
7313baad | 2757 | |
f6ac5f3d PA |
2758 | if (fd == -1 && *target_errno == FILEIO_ENOSYS) |
2759 | continue; | |
1c4b552b | 2760 | |
f6ac5f3d PA |
2761 | if (fd < 0) |
2762 | fd = -1; | |
2763 | else | |
2764 | fd = acquire_fileio_fd (t, fd); | |
2765 | ||
2766 | if (targetdebug) | |
2767 | fprintf_unfiltered (gdb_stdlog, | |
4313b8c0 | 2768 | "target_fileio_open (%d,%s,0x%x,0%o,%d)" |
07c138c8 GB |
2769 | " = %d (%d)\n", |
2770 | inf == NULL ? 0 : inf->num, | |
7313baad | 2771 | filename, flags, mode, |
4313b8c0 GB |
2772 | warn_if_slow, fd, |
2773 | fd != -1 ? 0 : *target_errno); | |
f6ac5f3d | 2774 | return fd; |
7313baad UW |
2775 | } |
2776 | ||
2777 | *target_errno = FILEIO_ENOSYS; | |
2778 | return -1; | |
2779 | } | |
2780 | ||
12e2a5fd GB |
2781 | /* See target.h. */ |
2782 | ||
4313b8c0 GB |
2783 | int |
2784 | target_fileio_open (struct inferior *inf, const char *filename, | |
2785 | int flags, int mode, int *target_errno) | |
2786 | { | |
2787 | return target_fileio_open_1 (inf, filename, flags, mode, 0, | |
2788 | target_errno); | |
2789 | } | |
2790 | ||
2791 | /* See target.h. */ | |
2792 | ||
2793 | int | |
2794 | target_fileio_open_warn_if_slow (struct inferior *inf, | |
2795 | const char *filename, | |
2796 | int flags, int mode, int *target_errno) | |
2797 | { | |
2798 | return target_fileio_open_1 (inf, filename, flags, mode, 1, | |
2799 | target_errno); | |
2800 | } | |
2801 | ||
2802 | /* See target.h. */ | |
2803 | ||
7313baad UW |
2804 | int |
2805 | target_fileio_pwrite (int fd, const gdb_byte *write_buf, int len, | |
2806 | ULONGEST offset, int *target_errno) | |
2807 | { | |
1c4b552b GB |
2808 | fileio_fh_t *fh = fileio_fd_to_fh (fd); |
2809 | int ret = -1; | |
7313baad | 2810 | |
5ff79300 | 2811 | if (fh->is_closed ()) |
1c4b552b | 2812 | *target_errno = EBADF; |
20db9c52 PA |
2813 | else if (fh->target == NULL) |
2814 | *target_errno = EIO; | |
1c4b552b | 2815 | else |
f6ac5f3d PA |
2816 | ret = fh->target->fileio_pwrite (fh->target_fd, write_buf, |
2817 | len, offset, target_errno); | |
7313baad | 2818 | |
1c4b552b GB |
2819 | if (targetdebug) |
2820 | fprintf_unfiltered (gdb_stdlog, | |
2821 | "target_fileio_pwrite (%d,...,%d,%s) " | |
2822 | "= %d (%d)\n", | |
2823 | fd, len, pulongest (offset), | |
2824 | ret, ret != -1 ? 0 : *target_errno); | |
2825 | return ret; | |
7313baad UW |
2826 | } |
2827 | ||
12e2a5fd GB |
2828 | /* See target.h. */ |
2829 | ||
7313baad UW |
2830 | int |
2831 | target_fileio_pread (int fd, gdb_byte *read_buf, int len, | |
2832 | ULONGEST offset, int *target_errno) | |
2833 | { | |
1c4b552b GB |
2834 | fileio_fh_t *fh = fileio_fd_to_fh (fd); |
2835 | int ret = -1; | |
7313baad | 2836 | |
5ff79300 | 2837 | if (fh->is_closed ()) |
1c4b552b | 2838 | *target_errno = EBADF; |
20db9c52 PA |
2839 | else if (fh->target == NULL) |
2840 | *target_errno = EIO; | |
1c4b552b | 2841 | else |
f6ac5f3d PA |
2842 | ret = fh->target->fileio_pread (fh->target_fd, read_buf, |
2843 | len, offset, target_errno); | |
7313baad | 2844 | |
1c4b552b GB |
2845 | if (targetdebug) |
2846 | fprintf_unfiltered (gdb_stdlog, | |
2847 | "target_fileio_pread (%d,...,%d,%s) " | |
2848 | "= %d (%d)\n", | |
2849 | fd, len, pulongest (offset), | |
2850 | ret, ret != -1 ? 0 : *target_errno); | |
9b15c1f0 GB |
2851 | return ret; |
2852 | } | |
2853 | ||
2854 | /* See target.h. */ | |
12e2a5fd | 2855 | |
9b15c1f0 GB |
2856 | int |
2857 | target_fileio_fstat (int fd, struct stat *sb, int *target_errno) | |
2858 | { | |
2859 | fileio_fh_t *fh = fileio_fd_to_fh (fd); | |
2860 | int ret = -1; | |
2861 | ||
5ff79300 | 2862 | if (fh->is_closed ()) |
9b15c1f0 | 2863 | *target_errno = EBADF; |
20db9c52 PA |
2864 | else if (fh->target == NULL) |
2865 | *target_errno = EIO; | |
9b15c1f0 | 2866 | else |
f6ac5f3d | 2867 | ret = fh->target->fileio_fstat (fh->target_fd, sb, target_errno); |
9b15c1f0 GB |
2868 | |
2869 | if (targetdebug) | |
2870 | fprintf_unfiltered (gdb_stdlog, | |
2871 | "target_fileio_fstat (%d) = %d (%d)\n", | |
2872 | fd, ret, ret != -1 ? 0 : *target_errno); | |
1c4b552b | 2873 | return ret; |
7313baad UW |
2874 | } |
2875 | ||
12e2a5fd GB |
2876 | /* See target.h. */ |
2877 | ||
7313baad UW |
2878 | int |
2879 | target_fileio_close (int fd, int *target_errno) | |
2880 | { | |
1c4b552b GB |
2881 | fileio_fh_t *fh = fileio_fd_to_fh (fd); |
2882 | int ret = -1; | |
7313baad | 2883 | |
5ff79300 | 2884 | if (fh->is_closed ()) |
1c4b552b GB |
2885 | *target_errno = EBADF; |
2886 | else | |
7313baad | 2887 | { |
20db9c52 | 2888 | if (fh->target != NULL) |
f6ac5f3d PA |
2889 | ret = fh->target->fileio_close (fh->target_fd, |
2890 | target_errno); | |
20db9c52 PA |
2891 | else |
2892 | ret = 0; | |
1c4b552b | 2893 | release_fileio_fd (fd, fh); |
7313baad UW |
2894 | } |
2895 | ||
1c4b552b GB |
2896 | if (targetdebug) |
2897 | fprintf_unfiltered (gdb_stdlog, | |
2898 | "target_fileio_close (%d) = %d (%d)\n", | |
2899 | fd, ret, ret != -1 ? 0 : *target_errno); | |
2900 | return ret; | |
7313baad UW |
2901 | } |
2902 | ||
12e2a5fd GB |
2903 | /* See target.h. */ |
2904 | ||
7313baad | 2905 | int |
07c138c8 GB |
2906 | target_fileio_unlink (struct inferior *inf, const char *filename, |
2907 | int *target_errno) | |
7313baad | 2908 | { |
b6a8c27b | 2909 | for (target_ops *t = default_fileio_target (); t != NULL; t = t->beneath ()) |
7313baad | 2910 | { |
f6ac5f3d | 2911 | int ret = t->fileio_unlink (inf, filename, target_errno); |
7313baad | 2912 | |
f6ac5f3d PA |
2913 | if (ret == -1 && *target_errno == FILEIO_ENOSYS) |
2914 | continue; | |
2915 | ||
2916 | if (targetdebug) | |
2917 | fprintf_unfiltered (gdb_stdlog, | |
2918 | "target_fileio_unlink (%d,%s)" | |
2919 | " = %d (%d)\n", | |
2920 | inf == NULL ? 0 : inf->num, filename, | |
2921 | ret, ret != -1 ? 0 : *target_errno); | |
2922 | return ret; | |
7313baad UW |
2923 | } |
2924 | ||
2925 | *target_errno = FILEIO_ENOSYS; | |
2926 | return -1; | |
2927 | } | |
2928 | ||
12e2a5fd GB |
2929 | /* See target.h. */ |
2930 | ||
e0d3522b | 2931 | gdb::optional<std::string> |
07c138c8 GB |
2932 | target_fileio_readlink (struct inferior *inf, const char *filename, |
2933 | int *target_errno) | |
b9e7b9c3 | 2934 | { |
b6a8c27b | 2935 | for (target_ops *t = default_fileio_target (); t != NULL; t = t->beneath ()) |
b9e7b9c3 | 2936 | { |
f6ac5f3d PA |
2937 | gdb::optional<std::string> ret |
2938 | = t->fileio_readlink (inf, filename, target_errno); | |
b9e7b9c3 | 2939 | |
f6ac5f3d PA |
2940 | if (!ret.has_value () && *target_errno == FILEIO_ENOSYS) |
2941 | continue; | |
2942 | ||
2943 | if (targetdebug) | |
2944 | fprintf_unfiltered (gdb_stdlog, | |
2945 | "target_fileio_readlink (%d,%s)" | |
2946 | " = %s (%d)\n", | |
2947 | inf == NULL ? 0 : inf->num, | |
2948 | filename, ret ? ret->c_str () : "(nil)", | |
2949 | ret ? 0 : *target_errno); | |
2950 | return ret; | |
b9e7b9c3 UW |
2951 | } |
2952 | ||
2953 | *target_errno = FILEIO_ENOSYS; | |
e0d3522b | 2954 | return {}; |
b9e7b9c3 UW |
2955 | } |
2956 | ||
770623f7 TT |
2957 | /* Like scoped_fd, but specific to target fileio. */ |
2958 | ||
2959 | class scoped_target_fd | |
7313baad | 2960 | { |
770623f7 TT |
2961 | public: |
2962 | explicit scoped_target_fd (int fd) noexcept | |
2963 | : m_fd (fd) | |
2964 | { | |
2965 | } | |
7313baad | 2966 | |
770623f7 TT |
2967 | ~scoped_target_fd () |
2968 | { | |
2969 | if (m_fd >= 0) | |
2970 | { | |
2971 | int target_errno; | |
2972 | ||
2973 | target_fileio_close (m_fd, &target_errno); | |
2974 | } | |
2975 | } | |
2976 | ||
2977 | DISABLE_COPY_AND_ASSIGN (scoped_target_fd); | |
2978 | ||
2979 | int get () const noexcept | |
2980 | { | |
2981 | return m_fd; | |
2982 | } | |
2983 | ||
2984 | private: | |
2985 | int m_fd; | |
2986 | }; | |
7313baad | 2987 | |
07c138c8 GB |
2988 | /* Read target file FILENAME, in the filesystem as seen by INF. If |
2989 | INF is NULL, use the filesystem seen by the debugger (GDB or, for | |
2990 | remote targets, the remote stub). Store the result in *BUF_P and | |
2991 | return the size of the transferred data. PADDING additional bytes | |
2992 | are available in *BUF_P. This is a helper function for | |
2993 | target_fileio_read_alloc; see the declaration of that function for | |
2994 | more information. */ | |
7313baad | 2995 | |
f7af1fcd JK |
2996 | static LONGEST |
2997 | target_fileio_read_alloc_1 (struct inferior *inf, const char *filename, | |
2998 | gdb_byte **buf_p, int padding) | |
2999 | { | |
db1ff28b JK |
3000 | size_t buf_alloc, buf_pos; |
3001 | gdb_byte *buf; | |
3002 | LONGEST n; | |
db1ff28b | 3003 | int target_errno; |
f7af1fcd | 3004 | |
770623f7 TT |
3005 | scoped_target_fd fd (target_fileio_open (inf, filename, FILEIO_O_RDONLY, |
3006 | 0700, &target_errno)); | |
3007 | if (fd.get () == -1) | |
f7af1fcd JK |
3008 | return -1; |
3009 | ||
db1ff28b JK |
3010 | /* Start by reading up to 4K at a time. The target will throttle |
3011 | this number down if necessary. */ | |
3012 | buf_alloc = 4096; | |
224c3ddb | 3013 | buf = (gdb_byte *) xmalloc (buf_alloc); |
db1ff28b JK |
3014 | buf_pos = 0; |
3015 | while (1) | |
3016 | { | |
770623f7 | 3017 | n = target_fileio_pread (fd.get (), &buf[buf_pos], |
db1ff28b JK |
3018 | buf_alloc - buf_pos - padding, buf_pos, |
3019 | &target_errno); | |
3020 | if (n < 0) | |
3021 | { | |
3022 | /* An error occurred. */ | |
db1ff28b JK |
3023 | xfree (buf); |
3024 | return -1; | |
3025 | } | |
3026 | else if (n == 0) | |
3027 | { | |
3028 | /* Read all there was. */ | |
db1ff28b JK |
3029 | if (buf_pos == 0) |
3030 | xfree (buf); | |
3031 | else | |
3032 | *buf_p = buf; | |
3033 | return buf_pos; | |
3034 | } | |
3035 | ||
3036 | buf_pos += n; | |
3037 | ||
3038 | /* If the buffer is filling up, expand it. */ | |
3039 | if (buf_alloc < buf_pos * 2) | |
3040 | { | |
3041 | buf_alloc *= 2; | |
224c3ddb | 3042 | buf = (gdb_byte *) xrealloc (buf, buf_alloc); |
db1ff28b JK |
3043 | } |
3044 | ||
3045 | QUIT; | |
3046 | } | |
f7af1fcd JK |
3047 | } |
3048 | ||
12e2a5fd | 3049 | /* See target.h. */ |
7313baad UW |
3050 | |
3051 | LONGEST | |
07c138c8 GB |
3052 | target_fileio_read_alloc (struct inferior *inf, const char *filename, |
3053 | gdb_byte **buf_p) | |
7313baad | 3054 | { |
07c138c8 | 3055 | return target_fileio_read_alloc_1 (inf, filename, buf_p, 0); |
7313baad UW |
3056 | } |
3057 | ||
db1ff28b | 3058 | /* See target.h. */ |
f7af1fcd | 3059 | |
87028b87 | 3060 | gdb::unique_xmalloc_ptr<char> |
f7af1fcd JK |
3061 | target_fileio_read_stralloc (struct inferior *inf, const char *filename) |
3062 | { | |
db1ff28b JK |
3063 | gdb_byte *buffer; |
3064 | char *bufstr; | |
3065 | LONGEST i, transferred; | |
3066 | ||
3067 | transferred = target_fileio_read_alloc_1 (inf, filename, &buffer, 1); | |
3068 | bufstr = (char *) buffer; | |
3069 | ||
3070 | if (transferred < 0) | |
87028b87 | 3071 | return gdb::unique_xmalloc_ptr<char> (nullptr); |
db1ff28b JK |
3072 | |
3073 | if (transferred == 0) | |
87028b87 | 3074 | return gdb::unique_xmalloc_ptr<char> (xstrdup ("")); |
db1ff28b JK |
3075 | |
3076 | bufstr[transferred] = 0; | |
3077 | ||
3078 | /* Check for embedded NUL bytes; but allow trailing NULs. */ | |
3079 | for (i = strlen (bufstr); i < transferred; i++) | |
3080 | if (bufstr[i] != 0) | |
3081 | { | |
3082 | warning (_("target file %s " | |
3083 | "contained unexpected null characters"), | |
3084 | filename); | |
3085 | break; | |
3086 | } | |
3087 | ||
87028b87 | 3088 | return gdb::unique_xmalloc_ptr<char> (bufstr); |
f7af1fcd | 3089 | } |
7313baad | 3090 | |
db1ff28b | 3091 | |
e0d24f8d | 3092 | static int |
31568a15 TT |
3093 | default_region_ok_for_hw_watchpoint (struct target_ops *self, |
3094 | CORE_ADDR addr, int len) | |
e0d24f8d | 3095 | { |
f5656ead | 3096 | return (len <= gdbarch_ptr_bit (target_gdbarch ()) / TARGET_CHAR_BIT); |
ccaa32c7 GS |
3097 | } |
3098 | ||
5009afc5 AS |
3099 | static int |
3100 | default_watchpoint_addr_within_range (struct target_ops *target, | |
3101 | CORE_ADDR addr, | |
3102 | CORE_ADDR start, int length) | |
3103 | { | |
3104 | return addr >= start && addr < start + length; | |
3105 | } | |
3106 | ||
8b06beed TT |
3107 | /* See target.h. */ |
3108 | ||
a1740ee1 PA |
3109 | target_ops * |
3110 | target_stack::find_beneath (const target_ops *t) const | |
8b06beed | 3111 | { |
a1740ee1 PA |
3112 | /* Look for a non-empty slot at stratum levels beneath T's. */ |
3113 | for (int stratum = t->to_stratum - 1; stratum >= 0; --stratum) | |
3114 | if (m_stack[stratum] != NULL) | |
3115 | return m_stack[stratum]; | |
8b06beed TT |
3116 | |
3117 | return NULL; | |
3118 | } | |
3119 | ||
a1740ee1 PA |
3120 | /* See target.h. */ |
3121 | ||
3122 | struct target_ops * | |
3123 | find_target_at (enum strata stratum) | |
3124 | { | |
3125 | return g_target_stack.at (stratum); | |
3126 | } | |
3127 | ||
c906108c | 3128 | \f |
0f48b757 PA |
3129 | |
3130 | /* See target.h */ | |
3131 | ||
3132 | void | |
3133 | target_announce_detach (int from_tty) | |
3134 | { | |
3135 | pid_t pid; | |
a121b7c1 | 3136 | const char *exec_file; |
0f48b757 PA |
3137 | |
3138 | if (!from_tty) | |
3139 | return; | |
3140 | ||
3141 | exec_file = get_exec_file (0); | |
3142 | if (exec_file == NULL) | |
3143 | exec_file = ""; | |
3144 | ||
e99b03dc | 3145 | pid = inferior_ptid.pid (); |
0f48b757 | 3146 | printf_unfiltered (_("Detaching from program: %s, %s\n"), exec_file, |
f2907e49 | 3147 | target_pid_to_str (ptid_t (pid))); |
0f48b757 PA |
3148 | gdb_flush (gdb_stdout); |
3149 | } | |
3150 | ||
c906108c SS |
3151 | /* The inferior process has died. Long live the inferior! */ |
3152 | ||
3153 | void | |
fba45db2 | 3154 | generic_mourn_inferior (void) |
c906108c | 3155 | { |
00431a78 | 3156 | inferior *inf = current_inferior (); |
c906108c | 3157 | |
39f77062 | 3158 | inferior_ptid = null_ptid; |
7f9f62ba | 3159 | |
f59f708a PA |
3160 | /* Mark breakpoints uninserted in case something tries to delete a |
3161 | breakpoint while we delete the inferior's threads (which would | |
3162 | fail, since the inferior is long gone). */ | |
3163 | mark_breakpoints_out (); | |
3164 | ||
00431a78 PA |
3165 | if (inf->pid != 0) |
3166 | exit_inferior (inf); | |
7f9f62ba | 3167 | |
f59f708a PA |
3168 | /* Note this wipes step-resume breakpoints, so needs to be done |
3169 | after exit_inferior, which ends up referencing the step-resume | |
3170 | breakpoints through clear_thread_inferior_resources. */ | |
c906108c | 3171 | breakpoint_init_inferior (inf_exited); |
f59f708a | 3172 | |
c906108c SS |
3173 | registers_changed (); |
3174 | ||
c906108c SS |
3175 | reopen_exec_file (); |
3176 | reinit_frame_cache (); | |
3177 | ||
9a4105ab AC |
3178 | if (deprecated_detach_hook) |
3179 | deprecated_detach_hook (); | |
c906108c SS |
3180 | } |
3181 | \f | |
fd0a2a6f MK |
3182 | /* Convert a normal process ID to a string. Returns the string in a |
3183 | static buffer. */ | |
c906108c | 3184 | |
7a114964 | 3185 | const char * |
39f77062 | 3186 | normal_pid_to_str (ptid_t ptid) |
c906108c | 3187 | { |
fd0a2a6f | 3188 | static char buf[32]; |
c906108c | 3189 | |
e99b03dc | 3190 | xsnprintf (buf, sizeof buf, "process %d", ptid.pid ()); |
c906108c SS |
3191 | return buf; |
3192 | } | |
3193 | ||
7a114964 | 3194 | static const char * |
770234d3 | 3195 | default_pid_to_str (struct target_ops *ops, ptid_t ptid) |
117de6a9 PA |
3196 | { |
3197 | return normal_pid_to_str (ptid); | |
3198 | } | |
3199 | ||
9b4eba8e HZ |
3200 | /* Error-catcher for target_find_memory_regions. */ |
3201 | static int | |
2e73927c TT |
3202 | dummy_find_memory_regions (struct target_ops *self, |
3203 | find_memory_region_ftype ignore1, void *ignore2) | |
be4d1333 | 3204 | { |
9b4eba8e | 3205 | error (_("Command not implemented for this target.")); |
be4d1333 MS |
3206 | return 0; |
3207 | } | |
3208 | ||
9b4eba8e HZ |
3209 | /* Error-catcher for target_make_corefile_notes. */ |
3210 | static char * | |
fc6691b2 TT |
3211 | dummy_make_corefile_notes (struct target_ops *self, |
3212 | bfd *ignore1, int *ignore2) | |
be4d1333 | 3213 | { |
9b4eba8e | 3214 | error (_("Command not implemented for this target.")); |
be4d1333 MS |
3215 | return NULL; |
3216 | } | |
3217 | ||
f6ac5f3d PA |
3218 | #include "target-delegates.c" |
3219 | ||
c906108c | 3220 | |
d9f719f1 PA |
3221 | static const target_info dummy_target_info = { |
3222 | "None", | |
3223 | N_("None"), | |
3224 | "" | |
3225 | }; | |
3226 | ||
f6ac5f3d PA |
3227 | dummy_target::dummy_target () |
3228 | { | |
3229 | to_stratum = dummy_stratum; | |
3230 | } | |
3231 | ||
f6ac5f3d PA |
3232 | debug_target::debug_target () |
3233 | { | |
3234 | to_stratum = debug_stratum; | |
3235 | } | |
3236 | ||
d9f719f1 PA |
3237 | const target_info & |
3238 | dummy_target::info () const | |
f6ac5f3d | 3239 | { |
d9f719f1 | 3240 | return dummy_target_info; |
f6ac5f3d PA |
3241 | } |
3242 | ||
d9f719f1 PA |
3243 | const target_info & |
3244 | debug_target::info () const | |
f6ac5f3d | 3245 | { |
b6a8c27b | 3246 | return beneath ()->info (); |
f6ac5f3d PA |
3247 | } |
3248 | ||
c906108c | 3249 | \f |
c906108c | 3250 | |
f1c07ab0 | 3251 | void |
460014f5 | 3252 | target_close (struct target_ops *targ) |
f1c07ab0 | 3253 | { |
7fdc1521 TT |
3254 | gdb_assert (!target_is_pushed (targ)); |
3255 | ||
20db9c52 PA |
3256 | fileio_handles_invalidate_target (targ); |
3257 | ||
f6ac5f3d | 3258 | targ->close (); |
947b8855 PA |
3259 | |
3260 | if (targetdebug) | |
460014f5 | 3261 | fprintf_unfiltered (gdb_stdlog, "target_close ()\n"); |
f1c07ab0 AC |
3262 | } |
3263 | ||
28439f5e PA |
3264 | int |
3265 | target_thread_alive (ptid_t ptid) | |
c906108c | 3266 | { |
8b88a78e | 3267 | return current_top_target ()->thread_alive (ptid); |
28439f5e PA |
3268 | } |
3269 | ||
3270 | void | |
e8032dde | 3271 | target_update_thread_list (void) |
28439f5e | 3272 | { |
8b88a78e | 3273 | current_top_target ()->update_thread_list (); |
c906108c SS |
3274 | } |
3275 | ||
d914c394 SS |
3276 | void |
3277 | target_stop (ptid_t ptid) | |
3278 | { | |
3279 | if (!may_stop) | |
3280 | { | |
3281 | warning (_("May not interrupt or stop the target, ignoring attempt")); | |
3282 | return; | |
3283 | } | |
3284 | ||
8b88a78e | 3285 | current_top_target ()->stop (ptid); |
d914c394 SS |
3286 | } |
3287 | ||
bfedc46a | 3288 | void |
e671cd59 | 3289 | target_interrupt () |
bfedc46a PA |
3290 | { |
3291 | if (!may_stop) | |
3292 | { | |
3293 | warning (_("May not interrupt or stop the target, ignoring attempt")); | |
3294 | return; | |
3295 | } | |
3296 | ||
8b88a78e | 3297 | current_top_target ()->interrupt (); |
bfedc46a PA |
3298 | } |
3299 | ||
abc56d60 PA |
3300 | /* See target.h. */ |
3301 | ||
93692b58 PA |
3302 | void |
3303 | target_pass_ctrlc (void) | |
3304 | { | |
8b88a78e | 3305 | current_top_target ()->pass_ctrlc (); |
93692b58 PA |
3306 | } |
3307 | ||
3308 | /* See target.h. */ | |
3309 | ||
3310 | void | |
3311 | default_target_pass_ctrlc (struct target_ops *ops) | |
3312 | { | |
e671cd59 | 3313 | target_interrupt (); |
93692b58 PA |
3314 | } |
3315 | ||
f8c1d06b GB |
3316 | /* See target/target.h. */ |
3317 | ||
3318 | void | |
03f4463b | 3319 | target_stop_and_wait (ptid_t ptid) |
f8c1d06b GB |
3320 | { |
3321 | struct target_waitstatus status; | |
3322 | int was_non_stop = non_stop; | |
3323 | ||
3324 | non_stop = 1; | |
3325 | target_stop (ptid); | |
3326 | ||
3327 | memset (&status, 0, sizeof (status)); | |
3328 | target_wait (ptid, &status, 0); | |
3329 | ||
3330 | non_stop = was_non_stop; | |
3331 | } | |
3332 | ||
3333 | /* See target/target.h. */ | |
3334 | ||
3335 | void | |
03f4463b | 3336 | target_continue_no_signal (ptid_t ptid) |
f8c1d06b GB |
3337 | { |
3338 | target_resume (ptid, 0, GDB_SIGNAL_0); | |
3339 | } | |
3340 | ||
049a8570 SDJ |
3341 | /* See target/target.h. */ |
3342 | ||
3343 | void | |
3344 | target_continue (ptid_t ptid, enum gdb_signal signal) | |
3345 | { | |
3346 | target_resume (ptid, 0, signal); | |
3347 | } | |
3348 | ||
fdbac7d8 | 3349 | /* Concatenate ELEM to LIST, a comma-separated list. */ |
09826ec5 | 3350 | |
09ce46f2 SM |
3351 | static void |
3352 | str_comma_list_concat_elem (std::string *list, const char *elem) | |
09826ec5 | 3353 | { |
09ce46f2 SM |
3354 | if (!list->empty ()) |
3355 | list->append (", "); | |
3356 | ||
3357 | list->append (elem); | |
09826ec5 PA |
3358 | } |
3359 | ||
3360 | /* Helper for target_options_to_string. If OPT is present in | |
3361 | TARGET_OPTIONS, append the OPT_STR (string version of OPT) in RET. | |
09ce46f2 | 3362 | OPT is removed from TARGET_OPTIONS. */ |
09826ec5 | 3363 | |
09ce46f2 SM |
3364 | static void |
3365 | do_option (int *target_options, std::string *ret, | |
a121b7c1 | 3366 | int opt, const char *opt_str) |
09826ec5 PA |
3367 | { |
3368 | if ((*target_options & opt) != 0) | |
3369 | { | |
09ce46f2 | 3370 | str_comma_list_concat_elem (ret, opt_str); |
09826ec5 PA |
3371 | *target_options &= ~opt; |
3372 | } | |
09826ec5 PA |
3373 | } |
3374 | ||
fdbac7d8 SM |
3375 | /* See target.h. */ |
3376 | ||
09ce46f2 | 3377 | std::string |
09826ec5 PA |
3378 | target_options_to_string (int target_options) |
3379 | { | |
09ce46f2 | 3380 | std::string ret; |
09826ec5 PA |
3381 | |
3382 | #define DO_TARG_OPTION(OPT) \ | |
09ce46f2 | 3383 | do_option (&target_options, &ret, OPT, #OPT) |
09826ec5 PA |
3384 | |
3385 | DO_TARG_OPTION (TARGET_WNOHANG); | |
3386 | ||
3387 | if (target_options != 0) | |
09ce46f2 | 3388 | str_comma_list_concat_elem (&ret, "unknown???"); |
09826ec5 | 3389 | |
09826ec5 PA |
3390 | return ret; |
3391 | } | |
3392 | ||
28439f5e PA |
3393 | void |
3394 | target_fetch_registers (struct regcache *regcache, int regno) | |
c906108c | 3395 | { |
8b88a78e | 3396 | current_top_target ()->fetch_registers (regcache, regno); |
ad5989bd | 3397 | if (targetdebug) |
ef79d9a3 | 3398 | regcache->debug_print_register ("target_fetch_registers", regno); |
c906108c SS |
3399 | } |
3400 | ||
28439f5e PA |
3401 | void |
3402 | target_store_registers (struct regcache *regcache, int regno) | |
c906108c | 3403 | { |
d914c394 SS |
3404 | if (!may_write_registers) |
3405 | error (_("Writing to registers is not allowed (regno %d)"), regno); | |
3406 | ||
8b88a78e | 3407 | current_top_target ()->store_registers (regcache, regno); |
6b84065d | 3408 | if (targetdebug) |
28439f5e | 3409 | { |
ef79d9a3 | 3410 | regcache->debug_print_register ("target_store_registers", regno); |
28439f5e | 3411 | } |
c906108c SS |
3412 | } |
3413 | ||
dc146f7c VP |
3414 | int |
3415 | target_core_of_thread (ptid_t ptid) | |
3416 | { | |
8b88a78e | 3417 | return current_top_target ()->core_of_thread (ptid); |
dc146f7c VP |
3418 | } |
3419 | ||
936d2992 PA |
3420 | int |
3421 | simple_verify_memory (struct target_ops *ops, | |
3422 | const gdb_byte *data, CORE_ADDR lma, ULONGEST size) | |
3423 | { | |
3424 | LONGEST total_xfered = 0; | |
3425 | ||
3426 | while (total_xfered < size) | |
3427 | { | |
3428 | ULONGEST xfered_len; | |
3429 | enum target_xfer_status status; | |
3430 | gdb_byte buf[1024]; | |
768adc05 | 3431 | ULONGEST howmuch = std::min<ULONGEST> (sizeof (buf), size - total_xfered); |
936d2992 PA |
3432 | |
3433 | status = target_xfer_partial (ops, TARGET_OBJECT_MEMORY, NULL, | |
3434 | buf, NULL, lma + total_xfered, howmuch, | |
3435 | &xfered_len); | |
3436 | if (status == TARGET_XFER_OK | |
3437 | && memcmp (data + total_xfered, buf, xfered_len) == 0) | |
3438 | { | |
3439 | total_xfered += xfered_len; | |
3440 | QUIT; | |
3441 | } | |
3442 | else | |
3443 | return 0; | |
3444 | } | |
3445 | return 1; | |
3446 | } | |
3447 | ||
3448 | /* Default implementation of memory verification. */ | |
3449 | ||
3450 | static int | |
3451 | default_verify_memory (struct target_ops *self, | |
3452 | const gdb_byte *data, CORE_ADDR memaddr, ULONGEST size) | |
3453 | { | |
3454 | /* Start over from the top of the target stack. */ | |
8b88a78e | 3455 | return simple_verify_memory (current_top_target (), |
936d2992 PA |
3456 | data, memaddr, size); |
3457 | } | |
3458 | ||
4a5e7a5b PA |
3459 | int |
3460 | target_verify_memory (const gdb_byte *data, CORE_ADDR memaddr, ULONGEST size) | |
3461 | { | |
8b88a78e | 3462 | return current_top_target ()->verify_memory (data, memaddr, size); |
4a5e7a5b PA |
3463 | } |
3464 | ||
9c06b0b4 TJB |
3465 | /* The documentation for this function is in its prototype declaration in |
3466 | target.h. */ | |
3467 | ||
3468 | int | |
f4b0a671 SM |
3469 | target_insert_mask_watchpoint (CORE_ADDR addr, CORE_ADDR mask, |
3470 | enum target_hw_bp_type rw) | |
9c06b0b4 | 3471 | { |
8b88a78e | 3472 | return current_top_target ()->insert_mask_watchpoint (addr, mask, rw); |
9c06b0b4 TJB |
3473 | } |
3474 | ||
3475 | /* The documentation for this function is in its prototype declaration in | |
3476 | target.h. */ | |
3477 | ||
3478 | int | |
f4b0a671 SM |
3479 | target_remove_mask_watchpoint (CORE_ADDR addr, CORE_ADDR mask, |
3480 | enum target_hw_bp_type rw) | |
9c06b0b4 | 3481 | { |
8b88a78e | 3482 | return current_top_target ()->remove_mask_watchpoint (addr, mask, rw); |
9c06b0b4 TJB |
3483 | } |
3484 | ||
3485 | /* The documentation for this function is in its prototype declaration | |
3486 | in target.h. */ | |
3487 | ||
3488 | int | |
3489 | target_masked_watch_num_registers (CORE_ADDR addr, CORE_ADDR mask) | |
3490 | { | |
8b88a78e | 3491 | return current_top_target ()->masked_watch_num_registers (addr, mask); |
9c06b0b4 TJB |
3492 | } |
3493 | ||
f1310107 TJB |
3494 | /* The documentation for this function is in its prototype declaration |
3495 | in target.h. */ | |
3496 | ||
3497 | int | |
3498 | target_ranged_break_num_registers (void) | |
3499 | { | |
8b88a78e | 3500 | return current_top_target ()->ranged_break_num_registers (); |
f1310107 TJB |
3501 | } |
3502 | ||
02d27625 MM |
3503 | /* See target.h. */ |
3504 | ||
02d27625 | 3505 | struct btrace_target_info * |
f4abbc16 | 3506 | target_enable_btrace (ptid_t ptid, const struct btrace_config *conf) |
02d27625 | 3507 | { |
8b88a78e | 3508 | return current_top_target ()->enable_btrace (ptid, conf); |
02d27625 MM |
3509 | } |
3510 | ||
3511 | /* See target.h. */ | |
3512 | ||
3513 | void | |
3514 | target_disable_btrace (struct btrace_target_info *btinfo) | |
3515 | { | |
8b88a78e | 3516 | current_top_target ()->disable_btrace (btinfo); |
02d27625 MM |
3517 | } |
3518 | ||
3519 | /* See target.h. */ | |
3520 | ||
3521 | void | |
3522 | target_teardown_btrace (struct btrace_target_info *btinfo) | |
3523 | { | |
8b88a78e | 3524 | current_top_target ()->teardown_btrace (btinfo); |
02d27625 MM |
3525 | } |
3526 | ||
3527 | /* See target.h. */ | |
3528 | ||
969c39fb | 3529 | enum btrace_error |
734b0e4b | 3530 | target_read_btrace (struct btrace_data *btrace, |
969c39fb | 3531 | struct btrace_target_info *btinfo, |
02d27625 MM |
3532 | enum btrace_read_type type) |
3533 | { | |
8b88a78e | 3534 | return current_top_target ()->read_btrace (btrace, btinfo, type); |
02d27625 MM |
3535 | } |
3536 | ||
d02ed0bb MM |
3537 | /* See target.h. */ |
3538 | ||
f4abbc16 MM |
3539 | const struct btrace_config * |
3540 | target_btrace_conf (const struct btrace_target_info *btinfo) | |
3541 | { | |
8b88a78e | 3542 | return current_top_target ()->btrace_conf (btinfo); |
f4abbc16 MM |
3543 | } |
3544 | ||
3545 | /* See target.h. */ | |
3546 | ||
7c1687a9 MM |
3547 | void |
3548 | target_stop_recording (void) | |
3549 | { | |
8b88a78e | 3550 | current_top_target ()->stop_recording (); |
7c1687a9 MM |
3551 | } |
3552 | ||
3553 | /* See target.h. */ | |
3554 | ||
d02ed0bb | 3555 | void |
85e1311a | 3556 | target_save_record (const char *filename) |
d02ed0bb | 3557 | { |
8b88a78e | 3558 | current_top_target ()->save_record (filename); |
d02ed0bb MM |
3559 | } |
3560 | ||
3561 | /* See target.h. */ | |
3562 | ||
3563 | int | |
f6ac5f3d | 3564 | target_supports_delete_record () |
d02ed0bb | 3565 | { |
8b88a78e | 3566 | return current_top_target ()->supports_delete_record (); |
d02ed0bb MM |
3567 | } |
3568 | ||
3569 | /* See target.h. */ | |
3570 | ||
3571 | void | |
3572 | target_delete_record (void) | |
3573 | { | |
8b88a78e | 3574 | current_top_target ()->delete_record (); |
d02ed0bb MM |
3575 | } |
3576 | ||
3577 | /* See target.h. */ | |
3578 | ||
b158a20f TW |
3579 | enum record_method |
3580 | target_record_method (ptid_t ptid) | |
3581 | { | |
8b88a78e | 3582 | return current_top_target ()->record_method (ptid); |
b158a20f TW |
3583 | } |
3584 | ||
3585 | /* See target.h. */ | |
3586 | ||
d02ed0bb | 3587 | int |
a52eab48 | 3588 | target_record_is_replaying (ptid_t ptid) |
d02ed0bb | 3589 | { |
8b88a78e | 3590 | return current_top_target ()->record_is_replaying (ptid); |
d02ed0bb MM |
3591 | } |
3592 | ||
3593 | /* See target.h. */ | |
3594 | ||
7ff27e9b MM |
3595 | int |
3596 | target_record_will_replay (ptid_t ptid, int dir) | |
3597 | { | |
8b88a78e | 3598 | return current_top_target ()->record_will_replay (ptid, dir); |
7ff27e9b MM |
3599 | } |
3600 | ||
3601 | /* See target.h. */ | |
3602 | ||
797094dd MM |
3603 | void |
3604 | target_record_stop_replaying (void) | |
3605 | { | |
8b88a78e | 3606 | current_top_target ()->record_stop_replaying (); |
797094dd MM |
3607 | } |
3608 | ||
3609 | /* See target.h. */ | |
3610 | ||
d02ed0bb MM |
3611 | void |
3612 | target_goto_record_begin (void) | |
3613 | { | |
8b88a78e | 3614 | current_top_target ()->goto_record_begin (); |
d02ed0bb MM |
3615 | } |
3616 | ||
3617 | /* See target.h. */ | |
3618 | ||
3619 | void | |
3620 | target_goto_record_end (void) | |
3621 | { | |
8b88a78e | 3622 | current_top_target ()->goto_record_end (); |
d02ed0bb MM |
3623 | } |
3624 | ||
3625 | /* See target.h. */ | |
3626 | ||
3627 | void | |
3628 | target_goto_record (ULONGEST insn) | |
3629 | { | |
8b88a78e | 3630 | current_top_target ()->goto_record (insn); |
d02ed0bb MM |
3631 | } |
3632 | ||
67c86d06 MM |
3633 | /* See target.h. */ |
3634 | ||
3635 | void | |
9a24775b | 3636 | target_insn_history (int size, gdb_disassembly_flags flags) |
67c86d06 | 3637 | { |
8b88a78e | 3638 | current_top_target ()->insn_history (size, flags); |
67c86d06 MM |
3639 | } |
3640 | ||
3641 | /* See target.h. */ | |
3642 | ||
3643 | void | |
9a24775b PA |
3644 | target_insn_history_from (ULONGEST from, int size, |
3645 | gdb_disassembly_flags flags) | |
67c86d06 | 3646 | { |
8b88a78e | 3647 | current_top_target ()->insn_history_from (from, size, flags); |
67c86d06 MM |
3648 | } |
3649 | ||
3650 | /* See target.h. */ | |
3651 | ||
3652 | void | |
9a24775b PA |
3653 | target_insn_history_range (ULONGEST begin, ULONGEST end, |
3654 | gdb_disassembly_flags flags) | |
67c86d06 | 3655 | { |
8b88a78e | 3656 | current_top_target ()->insn_history_range (begin, end, flags); |
67c86d06 MM |
3657 | } |
3658 | ||
15984c13 MM |
3659 | /* See target.h. */ |
3660 | ||
3661 | void | |
0cb7c7b0 | 3662 | target_call_history (int size, record_print_flags flags) |
15984c13 | 3663 | { |
8b88a78e | 3664 | current_top_target ()->call_history (size, flags); |
15984c13 MM |
3665 | } |
3666 | ||
3667 | /* See target.h. */ | |
3668 | ||
3669 | void | |
0cb7c7b0 | 3670 | target_call_history_from (ULONGEST begin, int size, record_print_flags flags) |
15984c13 | 3671 | { |
8b88a78e | 3672 | current_top_target ()->call_history_from (begin, size, flags); |
15984c13 MM |
3673 | } |
3674 | ||
3675 | /* See target.h. */ | |
3676 | ||
3677 | void | |
0cb7c7b0 | 3678 | target_call_history_range (ULONGEST begin, ULONGEST end, record_print_flags flags) |
15984c13 | 3679 | { |
8b88a78e | 3680 | current_top_target ()->call_history_range (begin, end, flags); |
15984c13 MM |
3681 | } |
3682 | ||
ea001bdc MM |
3683 | /* See target.h. */ |
3684 | ||
3685 | const struct frame_unwind * | |
3686 | target_get_unwinder (void) | |
3687 | { | |
8b88a78e | 3688 | return current_top_target ()->get_unwinder (); |
ea001bdc MM |
3689 | } |
3690 | ||
3691 | /* See target.h. */ | |
3692 | ||
3693 | const struct frame_unwind * | |
3694 | target_get_tailcall_unwinder (void) | |
3695 | { | |
8b88a78e | 3696 | return current_top_target ()->get_tailcall_unwinder (); |
ea001bdc MM |
3697 | } |
3698 | ||
5fff78c4 MM |
3699 | /* See target.h. */ |
3700 | ||
3701 | void | |
3702 | target_prepare_to_generate_core (void) | |
3703 | { | |
8b88a78e | 3704 | current_top_target ()->prepare_to_generate_core (); |
5fff78c4 MM |
3705 | } |
3706 | ||
3707 | /* See target.h. */ | |
3708 | ||
3709 | void | |
3710 | target_done_generating_core (void) | |
3711 | { | |
8b88a78e | 3712 | current_top_target ()->done_generating_core (); |
5fff78c4 MM |
3713 | } |
3714 | ||
c906108c | 3715 | \f |
c5aa993b JM |
3716 | |
3717 | static char targ_desc[] = | |
3e43a32a MS |
3718 | "Names of targets and files being debugged.\nShows the entire \ |
3719 | stack of targets currently in use (including the exec-file,\n\ | |
c906108c SS |
3720 | core-file, and process, if any), as well as the symbol file name."; |
3721 | ||
a53f3625 | 3722 | static void |
a30bf1f1 TT |
3723 | default_rcmd (struct target_ops *self, const char *command, |
3724 | struct ui_file *output) | |
a53f3625 TT |
3725 | { |
3726 | error (_("\"monitor\" command not supported by this target.")); | |
3727 | } | |
3728 | ||
96baa820 | 3729 | static void |
0b39b52e | 3730 | do_monitor_command (const char *cmd, int from_tty) |
96baa820 | 3731 | { |
96baa820 JM |
3732 | target_rcmd (cmd, gdb_stdtarg); |
3733 | } | |
3734 | ||
78cbbba8 LM |
3735 | /* Erases all the memory regions marked as flash. CMD and FROM_TTY are |
3736 | ignored. */ | |
3737 | ||
3738 | void | |
0b39b52e | 3739 | flash_erase_command (const char *cmd, int from_tty) |
78cbbba8 LM |
3740 | { |
3741 | /* Used to communicate termination of flash operations to the target. */ | |
3742 | bool found_flash_region = false; | |
78cbbba8 LM |
3743 | struct gdbarch *gdbarch = target_gdbarch (); |
3744 | ||
a664f67e | 3745 | std::vector<mem_region> mem_regions = target_memory_map (); |
78cbbba8 LM |
3746 | |
3747 | /* Iterate over all memory regions. */ | |
a664f67e | 3748 | for (const mem_region &m : mem_regions) |
78cbbba8 | 3749 | { |
78cbbba8 | 3750 | /* Is this a flash memory region? */ |
a664f67e | 3751 | if (m.attrib.mode == MEM_FLASH) |
78cbbba8 LM |
3752 | { |
3753 | found_flash_region = true; | |
a664f67e | 3754 | target_flash_erase (m.lo, m.hi - m.lo); |
78cbbba8 | 3755 | |
76f9c9cf | 3756 | ui_out_emit_tuple tuple_emitter (current_uiout, "erased-regions"); |
78cbbba8 LM |
3757 | |
3758 | current_uiout->message (_("Erasing flash memory region at address ")); | |
a664f67e | 3759 | current_uiout->field_fmt ("address", "%s", paddress (gdbarch, m.lo)); |
78cbbba8 | 3760 | current_uiout->message (", size = "); |
a664f67e | 3761 | current_uiout->field_fmt ("size", "%s", hex_string (m.hi - m.lo)); |
78cbbba8 | 3762 | current_uiout->message ("\n"); |
78cbbba8 LM |
3763 | } |
3764 | } | |
3765 | ||
3766 | /* Did we do any flash operations? If so, we need to finalize them. */ | |
3767 | if (found_flash_region) | |
3768 | target_flash_done (); | |
3769 | else | |
3770 | current_uiout->message (_("No flash memory regions found.\n")); | |
3771 | } | |
3772 | ||
87680a14 JB |
3773 | /* Print the name of each layers of our target stack. */ |
3774 | ||
3775 | static void | |
d3cb6b99 | 3776 | maintenance_print_target_stack (const char *cmd, int from_tty) |
87680a14 | 3777 | { |
87680a14 JB |
3778 | printf_filtered (_("The current target stack is:\n")); |
3779 | ||
b6a8c27b | 3780 | for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
87680a14 | 3781 | { |
f6ac5f3d PA |
3782 | if (t->to_stratum == debug_stratum) |
3783 | continue; | |
3784 | printf_filtered (" - %s (%s)\n", t->shortname (), t->longname ()); | |
87680a14 JB |
3785 | } |
3786 | } | |
3787 | ||
372316f1 PA |
3788 | /* See target.h. */ |
3789 | ||
3790 | void | |
3791 | target_async (int enable) | |
3792 | { | |
3793 | infrun_async (enable); | |
8b88a78e | 3794 | current_top_target ()->async (enable); |
372316f1 PA |
3795 | } |
3796 | ||
65706a29 PA |
3797 | /* See target.h. */ |
3798 | ||
3799 | void | |
3800 | target_thread_events (int enable) | |
3801 | { | |
8b88a78e | 3802 | current_top_target ()->thread_events (enable); |
65706a29 PA |
3803 | } |
3804 | ||
329ea579 PA |
3805 | /* Controls if targets can report that they can/are async. This is |
3806 | just for maintainers to use when debugging gdb. */ | |
3807 | int target_async_permitted = 1; | |
c6ebd6cf VP |
3808 | |
3809 | /* The set command writes to this variable. If the inferior is | |
b5419e49 | 3810 | executing, target_async_permitted is *not* updated. */ |
329ea579 | 3811 | static int target_async_permitted_1 = 1; |
c6ebd6cf VP |
3812 | |
3813 | static void | |
eb4c3f4a | 3814 | maint_set_target_async_command (const char *args, int from_tty, |
329ea579 | 3815 | struct cmd_list_element *c) |
c6ebd6cf | 3816 | { |
c35b1492 | 3817 | if (have_live_inferiors ()) |
c6ebd6cf VP |
3818 | { |
3819 | target_async_permitted_1 = target_async_permitted; | |
3820 | error (_("Cannot change this setting while the inferior is running.")); | |
3821 | } | |
3822 | ||
3823 | target_async_permitted = target_async_permitted_1; | |
3824 | } | |
3825 | ||
3826 | static void | |
329ea579 PA |
3827 | maint_show_target_async_command (struct ui_file *file, int from_tty, |
3828 | struct cmd_list_element *c, | |
3829 | const char *value) | |
c6ebd6cf | 3830 | { |
3e43a32a MS |
3831 | fprintf_filtered (file, |
3832 | _("Controlling the inferior in " | |
3833 | "asynchronous mode is %s.\n"), value); | |
c6ebd6cf VP |
3834 | } |
3835 | ||
fbea99ea PA |
3836 | /* Return true if the target operates in non-stop mode even with "set |
3837 | non-stop off". */ | |
3838 | ||
3839 | static int | |
3840 | target_always_non_stop_p (void) | |
3841 | { | |
8b88a78e | 3842 | return current_top_target ()->always_non_stop_p (); |
fbea99ea PA |
3843 | } |
3844 | ||
3845 | /* See target.h. */ | |
3846 | ||
3847 | int | |
3848 | target_is_non_stop_p (void) | |
3849 | { | |
3850 | return (non_stop | |
3851 | || target_non_stop_enabled == AUTO_BOOLEAN_TRUE | |
3852 | || (target_non_stop_enabled == AUTO_BOOLEAN_AUTO | |
3853 | && target_always_non_stop_p ())); | |
3854 | } | |
3855 | ||
3856 | /* Controls if targets can report that they always run in non-stop | |
3857 | mode. This is just for maintainers to use when debugging gdb. */ | |
3858 | enum auto_boolean target_non_stop_enabled = AUTO_BOOLEAN_AUTO; | |
3859 | ||
3860 | /* The set command writes to this variable. If the inferior is | |
3861 | executing, target_non_stop_enabled is *not* updated. */ | |
3862 | static enum auto_boolean target_non_stop_enabled_1 = AUTO_BOOLEAN_AUTO; | |
3863 | ||
3864 | /* Implementation of "maint set target-non-stop". */ | |
3865 | ||
3866 | static void | |
eb4c3f4a | 3867 | maint_set_target_non_stop_command (const char *args, int from_tty, |
fbea99ea PA |
3868 | struct cmd_list_element *c) |
3869 | { | |
3870 | if (have_live_inferiors ()) | |
3871 | { | |
3872 | target_non_stop_enabled_1 = target_non_stop_enabled; | |
3873 | error (_("Cannot change this setting while the inferior is running.")); | |
3874 | } | |
3875 | ||
3876 | target_non_stop_enabled = target_non_stop_enabled_1; | |
3877 | } | |
3878 | ||
3879 | /* Implementation of "maint show target-non-stop". */ | |
3880 | ||
3881 | static void | |
3882 | maint_show_target_non_stop_command (struct ui_file *file, int from_tty, | |
3883 | struct cmd_list_element *c, | |
3884 | const char *value) | |
3885 | { | |
3886 | if (target_non_stop_enabled == AUTO_BOOLEAN_AUTO) | |
3887 | fprintf_filtered (file, | |
3888 | _("Whether the target is always in non-stop mode " | |
3889 | "is %s (currently %s).\n"), value, | |
3890 | target_always_non_stop_p () ? "on" : "off"); | |
3891 | else | |
3892 | fprintf_filtered (file, | |
3893 | _("Whether the target is always in non-stop mode " | |
3894 | "is %s.\n"), value); | |
3895 | } | |
3896 | ||
d914c394 SS |
3897 | /* Temporary copies of permission settings. */ |
3898 | ||
3899 | static int may_write_registers_1 = 1; | |
3900 | static int may_write_memory_1 = 1; | |
3901 | static int may_insert_breakpoints_1 = 1; | |
3902 | static int may_insert_tracepoints_1 = 1; | |
3903 | static int may_insert_fast_tracepoints_1 = 1; | |
3904 | static int may_stop_1 = 1; | |
3905 | ||
3906 | /* Make the user-set values match the real values again. */ | |
3907 | ||
3908 | void | |
3909 | update_target_permissions (void) | |
3910 | { | |
3911 | may_write_registers_1 = may_write_registers; | |
3912 | may_write_memory_1 = may_write_memory; | |
3913 | may_insert_breakpoints_1 = may_insert_breakpoints; | |
3914 | may_insert_tracepoints_1 = may_insert_tracepoints; | |
3915 | may_insert_fast_tracepoints_1 = may_insert_fast_tracepoints; | |
3916 | may_stop_1 = may_stop; | |
3917 | } | |
3918 | ||
3919 | /* The one function handles (most of) the permission flags in the same | |
3920 | way. */ | |
3921 | ||
3922 | static void | |
eb4c3f4a | 3923 | set_target_permissions (const char *args, int from_tty, |
d914c394 SS |
3924 | struct cmd_list_element *c) |
3925 | { | |
3926 | if (target_has_execution) | |
3927 | { | |
3928 | update_target_permissions (); | |
3929 | error (_("Cannot change this setting while the inferior is running.")); | |
3930 | } | |
3931 | ||
3932 | /* Make the real values match the user-changed values. */ | |
3933 | may_write_registers = may_write_registers_1; | |
3934 | may_insert_breakpoints = may_insert_breakpoints_1; | |
3935 | may_insert_tracepoints = may_insert_tracepoints_1; | |
3936 | may_insert_fast_tracepoints = may_insert_fast_tracepoints_1; | |
3937 | may_stop = may_stop_1; | |
3938 | update_observer_mode (); | |
3939 | } | |
3940 | ||
3941 | /* Set memory write permission independently of observer mode. */ | |
3942 | ||
3943 | static void | |
eb4c3f4a | 3944 | set_write_memory_permission (const char *args, int from_tty, |
d914c394 SS |
3945 | struct cmd_list_element *c) |
3946 | { | |
3947 | /* Make the real values match the user-changed values. */ | |
3948 | may_write_memory = may_write_memory_1; | |
3949 | update_observer_mode (); | |
3950 | } | |
3951 | ||
c906108c | 3952 | void |
fba45db2 | 3953 | initialize_targets (void) |
c906108c | 3954 | { |
f6ac5f3d PA |
3955 | the_dummy_target = new dummy_target (); |
3956 | push_target (the_dummy_target); | |
3957 | ||
3958 | the_debug_target = new debug_target (); | |
c906108c | 3959 | |
11db9430 SM |
3960 | add_info ("target", info_target_command, targ_desc); |
3961 | add_info ("files", info_target_command, targ_desc); | |
c906108c | 3962 | |
ccce17b0 | 3963 | add_setshow_zuinteger_cmd ("target", class_maintenance, &targetdebug, _("\ |
85c07804 AC |
3964 | Set target debugging."), _("\ |
3965 | Show target debugging."), _("\ | |
333dabeb | 3966 | When non-zero, target debugging is enabled. Higher numbers are more\n\ |
3cecbbbe TT |
3967 | verbose."), |
3968 | set_targetdebug, | |
ccce17b0 YQ |
3969 | show_targetdebug, |
3970 | &setdebuglist, &showdebuglist); | |
3a11626d | 3971 | |
2bc416ba | 3972 | add_setshow_boolean_cmd ("trust-readonly-sections", class_support, |
7915a72c AC |
3973 | &trust_readonly, _("\ |
3974 | Set mode for reading from readonly sections."), _("\ | |
3975 | Show mode for reading from readonly sections."), _("\ | |
3a11626d MS |
3976 | When this mode is on, memory reads from readonly sections (such as .text)\n\ |
3977 | will be read from the object file instead of from the target. This will\n\ | |
7915a72c | 3978 | result in significant performance improvement for remote targets."), |
2c5b56ce | 3979 | NULL, |
920d2a44 | 3980 | show_trust_readonly, |
e707bbc2 | 3981 | &setlist, &showlist); |
96baa820 JM |
3982 | |
3983 | add_com ("monitor", class_obscure, do_monitor_command, | |
1bedd215 | 3984 | _("Send a command to the remote monitor (remote targets only).")); |
96baa820 | 3985 | |
87680a14 JB |
3986 | add_cmd ("target-stack", class_maintenance, maintenance_print_target_stack, |
3987 | _("Print the name of each layer of the internal target stack."), | |
3988 | &maintenanceprintlist); | |
3989 | ||
c6ebd6cf VP |
3990 | add_setshow_boolean_cmd ("target-async", no_class, |
3991 | &target_async_permitted_1, _("\ | |
3992 | Set whether gdb controls the inferior in asynchronous mode."), _("\ | |
3993 | Show whether gdb controls the inferior in asynchronous mode."), _("\ | |
3994 | Tells gdb whether to control the inferior in asynchronous mode."), | |
329ea579 PA |
3995 | maint_set_target_async_command, |
3996 | maint_show_target_async_command, | |
3997 | &maintenance_set_cmdlist, | |
3998 | &maintenance_show_cmdlist); | |
c6ebd6cf | 3999 | |
fbea99ea PA |
4000 | add_setshow_auto_boolean_cmd ("target-non-stop", no_class, |
4001 | &target_non_stop_enabled_1, _("\ | |
4002 | Set whether gdb always controls the inferior in non-stop mode."), _("\ | |
4003 | Show whether gdb always controls the inferior in non-stop mode."), _("\ | |
4004 | Tells gdb whether to control the inferior in non-stop mode."), | |
4005 | maint_set_target_non_stop_command, | |
4006 | maint_show_target_non_stop_command, | |
4007 | &maintenance_set_cmdlist, | |
4008 | &maintenance_show_cmdlist); | |
4009 | ||
d914c394 SS |
4010 | add_setshow_boolean_cmd ("may-write-registers", class_support, |
4011 | &may_write_registers_1, _("\ | |
4012 | Set permission to write into registers."), _("\ | |
4013 | Show permission to write into registers."), _("\ | |
4014 | When this permission is on, GDB may write into the target's registers.\n\ | |
4015 | Otherwise, any sort of write attempt will result in an error."), | |
4016 | set_target_permissions, NULL, | |
4017 | &setlist, &showlist); | |
4018 | ||
4019 | add_setshow_boolean_cmd ("may-write-memory", class_support, | |
4020 | &may_write_memory_1, _("\ | |
4021 | Set permission to write into target memory."), _("\ | |
4022 | Show permission to write into target memory."), _("\ | |
4023 | When this permission is on, GDB may write into the target's memory.\n\ | |
4024 | Otherwise, any sort of write attempt will result in an error."), | |
4025 | set_write_memory_permission, NULL, | |
4026 | &setlist, &showlist); | |
4027 | ||
4028 | add_setshow_boolean_cmd ("may-insert-breakpoints", class_support, | |
4029 | &may_insert_breakpoints_1, _("\ | |
4030 | Set permission to insert breakpoints in the target."), _("\ | |
4031 | Show permission to insert breakpoints in the target."), _("\ | |
4032 | When this permission is on, GDB may insert breakpoints in the program.\n\ | |
4033 | Otherwise, any sort of insertion attempt will result in an error."), | |
4034 | set_target_permissions, NULL, | |
4035 | &setlist, &showlist); | |
4036 | ||
4037 | add_setshow_boolean_cmd ("may-insert-tracepoints", class_support, | |
4038 | &may_insert_tracepoints_1, _("\ | |
4039 | Set permission to insert tracepoints in the target."), _("\ | |
4040 | Show permission to insert tracepoints in the target."), _("\ | |
4041 | When this permission is on, GDB may insert tracepoints in the program.\n\ | |
4042 | Otherwise, any sort of insertion attempt will result in an error."), | |
4043 | set_target_permissions, NULL, | |
4044 | &setlist, &showlist); | |
4045 | ||
4046 | add_setshow_boolean_cmd ("may-insert-fast-tracepoints", class_support, | |
4047 | &may_insert_fast_tracepoints_1, _("\ | |
4048 | Set permission to insert fast tracepoints in the target."), _("\ | |
4049 | Show permission to insert fast tracepoints in the target."), _("\ | |
4050 | When this permission is on, GDB may insert fast tracepoints.\n\ | |
4051 | Otherwise, any sort of insertion attempt will result in an error."), | |
4052 | set_target_permissions, NULL, | |
4053 | &setlist, &showlist); | |
4054 | ||
4055 | add_setshow_boolean_cmd ("may-interrupt", class_support, | |
4056 | &may_stop_1, _("\ | |
4057 | Set permission to interrupt or signal the target."), _("\ | |
4058 | Show permission to interrupt or signal the target."), _("\ | |
4059 | When this permission is on, GDB may interrupt/stop the target's execution.\n\ | |
4060 | Otherwise, any attempt to interrupt or stop will be ignored."), | |
4061 | set_target_permissions, NULL, | |
4062 | &setlist, &showlist); | |
6a3cb8e8 | 4063 | |
78cbbba8 LM |
4064 | add_com ("flash-erase", no_class, flash_erase_command, |
4065 | _("Erase all flash memory regions.")); | |
4066 | ||
6a3cb8e8 PA |
4067 | add_setshow_boolean_cmd ("auto-connect-native-target", class_support, |
4068 | &auto_connect_native_target, _("\ | |
4069 | Set whether GDB may automatically connect to the native target."), _("\ | |
4070 | Show whether GDB may automatically connect to the native target."), _("\ | |
4071 | When on, and GDB is not connected to a target yet, GDB\n\ | |
4072 | attempts \"run\" and other commands with the native target."), | |
4073 | NULL, show_auto_connect_native_target, | |
4074 | &setlist, &showlist); | |
c906108c | 4075 | } |