Commit | Line | Data |
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c906108c | 1 | /* Select target systems and architectures at runtime for GDB. |
7998dfc3 | 2 | |
b811d2c2 | 3 | Copyright (C) 1990-2020 Free Software Foundation, Inc. |
7998dfc3 | 4 | |
c906108c SS |
5 | Contributed by Cygnus Support. |
6 | ||
c5aa993b | 7 | This file is part of GDB. |
c906108c | 8 | |
c5aa993b JM |
9 | This program is free software; you can redistribute it and/or modify |
10 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 11 | the Free Software Foundation; either version 3 of the License, or |
c5aa993b | 12 | (at your option) any later version. |
c906108c | 13 | |
c5aa993b JM |
14 | This program is distributed in the hope that it will be useful, |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
c906108c | 18 | |
c5aa993b | 19 | You should have received a copy of the GNU General Public License |
a9762ec7 | 20 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c SS |
21 | |
22 | #include "defs.h" | |
c906108c | 23 | #include "target.h" |
68c765e2 | 24 | #include "target-dcache.h" |
c906108c SS |
25 | #include "gdbcmd.h" |
26 | #include "symtab.h" | |
27 | #include "inferior.h" | |
45741a9c | 28 | #include "infrun.h" |
c906108c SS |
29 | #include "bfd.h" |
30 | #include "symfile.h" | |
31 | #include "objfiles.h" | |
4930751a | 32 | #include "dcache.h" |
c906108c | 33 | #include <signal.h> |
4e052eda | 34 | #include "regcache.h" |
b6591e8b | 35 | #include "gdbcore.h" |
424163ea | 36 | #include "target-descriptions.h" |
e1ac3328 | 37 | #include "gdbthread.h" |
b9db4ced | 38 | #include "solib.h" |
07b82ea5 | 39 | #include "exec.h" |
edb3359d | 40 | #include "inline-frame.h" |
2f4d8875 | 41 | #include "tracepoint.h" |
7313baad | 42 | #include "gdb/fileio.h" |
268a13a5 | 43 | #include "gdbsupport/agent.h" |
8de71aab | 44 | #include "auxv.h" |
a7068b60 | 45 | #include "target-debug.h" |
41fd2b0f PA |
46 | #include "top.h" |
47 | #include "event-top.h" | |
325fac50 | 48 | #include <algorithm> |
268a13a5 | 49 | #include "gdbsupport/byte-vector.h" |
e671cd59 | 50 | #include "terminal.h" |
d9f719f1 | 51 | #include <unordered_map> |
121b3efd | 52 | #include "target-connection.h" |
670e35fa | 53 | #include "valprint.h" |
c906108c | 54 | |
f0f9ff95 TT |
55 | static void generic_tls_error (void) ATTRIBUTE_NORETURN; |
56 | ||
0a4f40a2 | 57 | static void default_terminal_info (struct target_ops *, const char *, int); |
c906108c | 58 | |
5009afc5 AS |
59 | static int default_watchpoint_addr_within_range (struct target_ops *, |
60 | CORE_ADDR, CORE_ADDR, int); | |
61 | ||
31568a15 TT |
62 | static int default_region_ok_for_hw_watchpoint (struct target_ops *, |
63 | CORE_ADDR, int); | |
e0d24f8d | 64 | |
a30bf1f1 | 65 | static void default_rcmd (struct target_ops *, const char *, struct ui_file *); |
a53f3625 | 66 | |
4229b31d TT |
67 | static ptid_t default_get_ada_task_ptid (struct target_ops *self, |
68 | long lwp, long tid); | |
69 | ||
8d657035 TT |
70 | static void default_mourn_inferior (struct target_ops *self); |
71 | ||
58a5184e TT |
72 | static int default_search_memory (struct target_ops *ops, |
73 | CORE_ADDR start_addr, | |
74 | ULONGEST search_space_len, | |
75 | const gdb_byte *pattern, | |
76 | ULONGEST pattern_len, | |
77 | CORE_ADDR *found_addrp); | |
78 | ||
936d2992 PA |
79 | static int default_verify_memory (struct target_ops *self, |
80 | const gdb_byte *data, | |
81 | CORE_ADDR memaddr, ULONGEST size); | |
82 | ||
c25c4a8b | 83 | static void tcomplain (void) ATTRIBUTE_NORETURN; |
c906108c | 84 | |
a121b7c1 | 85 | static struct target_ops *find_default_run_target (const char *); |
c906108c | 86 | |
0b5a2719 TT |
87 | static int dummy_find_memory_regions (struct target_ops *self, |
88 | find_memory_region_ftype ignore1, | |
89 | void *ignore2); | |
90 | ||
16f796b1 TT |
91 | static char *dummy_make_corefile_notes (struct target_ops *self, |
92 | bfd *ignore1, int *ignore2); | |
93 | ||
a068643d | 94 | static std::string default_pid_to_str (struct target_ops *ops, ptid_t ptid); |
770234d3 | 95 | |
fe31bf5b TT |
96 | static enum exec_direction_kind default_execution_direction |
97 | (struct target_ops *self); | |
98 | ||
d9f719f1 PA |
99 | /* Mapping between target_info objects (which have address identity) |
100 | and corresponding open/factory function/callback. Each add_target | |
101 | call adds one entry to this map, and registers a "target | |
102 | TARGET_NAME" command that when invoked calls the factory registered | |
103 | here. The target_info object is associated with the command via | |
104 | the command's context. */ | |
105 | static std::unordered_map<const target_info *, target_open_ftype *> | |
106 | target_factories; | |
c906108c | 107 | |
06b5b831 | 108 | /* The singleton debug target. */ |
c906108c | 109 | |
f6ac5f3d | 110 | static struct target_ops *the_debug_target; |
c906108c SS |
111 | |
112 | /* Top of target stack. */ | |
c906108c SS |
113 | /* The target structure we are currently using to talk to a process |
114 | or file or whatever "inferior" we have. */ | |
115 | ||
8b88a78e PA |
116 | target_ops * |
117 | current_top_target () | |
118 | { | |
5b6d1e4f | 119 | return current_inferior ()->top_target (); |
8b88a78e | 120 | } |
c906108c SS |
121 | |
122 | /* Command list for target. */ | |
123 | ||
124 | static struct cmd_list_element *targetlist = NULL; | |
125 | ||
491144b5 | 126 | /* True if we should trust readonly sections from the |
cf7a04e8 DJ |
127 | executable when reading memory. */ |
128 | ||
491144b5 | 129 | static bool trust_readonly = false; |
cf7a04e8 | 130 | |
8defab1a DJ |
131 | /* Nonzero if we should show true memory content including |
132 | memory breakpoint inserted by gdb. */ | |
133 | ||
134 | static int show_memory_breakpoints = 0; | |
135 | ||
d914c394 SS |
136 | /* These globals control whether GDB attempts to perform these |
137 | operations; they are useful for targets that need to prevent | |
30baf67b | 138 | inadvertent disruption, such as in non-stop mode. */ |
d914c394 | 139 | |
491144b5 | 140 | bool may_write_registers = true; |
d914c394 | 141 | |
491144b5 | 142 | bool may_write_memory = true; |
d914c394 | 143 | |
491144b5 | 144 | bool may_insert_breakpoints = true; |
d914c394 | 145 | |
491144b5 | 146 | bool may_insert_tracepoints = true; |
d914c394 | 147 | |
491144b5 | 148 | bool may_insert_fast_tracepoints = true; |
d914c394 | 149 | |
491144b5 | 150 | bool may_stop = true; |
d914c394 | 151 | |
c906108c SS |
152 | /* Non-zero if we want to see trace of target level stuff. */ |
153 | ||
ccce17b0 | 154 | static unsigned int targetdebug = 0; |
3cecbbbe TT |
155 | |
156 | static void | |
eb4c3f4a | 157 | set_targetdebug (const char *args, int from_tty, struct cmd_list_element *c) |
3cecbbbe | 158 | { |
f6ac5f3d PA |
159 | if (targetdebug) |
160 | push_target (the_debug_target); | |
161 | else | |
162 | unpush_target (the_debug_target); | |
3cecbbbe TT |
163 | } |
164 | ||
920d2a44 AC |
165 | static void |
166 | show_targetdebug (struct ui_file *file, int from_tty, | |
167 | struct cmd_list_element *c, const char *value) | |
168 | { | |
169 | fprintf_filtered (file, _("Target debugging is %s.\n"), value); | |
170 | } | |
c906108c | 171 | |
c35b1492 | 172 | int |
a739972c | 173 | target_has_memory () |
c35b1492 | 174 | { |
b6a8c27b | 175 | for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
f6ac5f3d | 176 | if (t->has_memory ()) |
c35b1492 PA |
177 | return 1; |
178 | ||
179 | return 0; | |
180 | } | |
181 | ||
182 | int | |
841de120 | 183 | target_has_stack () |
c35b1492 | 184 | { |
b6a8c27b | 185 | for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
f6ac5f3d | 186 | if (t->has_stack ()) |
c35b1492 PA |
187 | return 1; |
188 | ||
189 | return 0; | |
190 | } | |
191 | ||
192 | int | |
9dccd06e | 193 | target_has_registers () |
c35b1492 | 194 | { |
b6a8c27b | 195 | for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
f6ac5f3d | 196 | if (t->has_registers ()) |
c35b1492 PA |
197 | return 1; |
198 | ||
199 | return 0; | |
200 | } | |
201 | ||
5018ce90 | 202 | bool |
55f6301a | 203 | target_has_execution (inferior *inf) |
c35b1492 | 204 | { |
55f6301a TT |
205 | if (inf == nullptr) |
206 | inf = current_inferior (); | |
207 | ||
5b6d1e4f PA |
208 | for (target_ops *t = inf->top_target (); |
209 | t != nullptr; | |
210 | t = inf->find_target_beneath (t)) | |
5018ce90 PA |
211 | if (t->has_execution (inf)) |
212 | return true; | |
c35b1492 | 213 | |
5018ce90 | 214 | return false; |
c35b1492 PA |
215 | } |
216 | ||
8981c758 TT |
217 | /* This is used to implement the various target commands. */ |
218 | ||
219 | static void | |
eb4c3f4a | 220 | open_target (const char *args, int from_tty, struct cmd_list_element *command) |
8981c758 | 221 | { |
d9f719f1 PA |
222 | auto *ti = static_cast<target_info *> (get_cmd_context (command)); |
223 | target_open_ftype *func = target_factories[ti]; | |
8981c758 TT |
224 | |
225 | if (targetdebug) | |
d9f719f1 PA |
226 | fprintf_unfiltered (gdb_stdlog, "-> %s->open (...)\n", |
227 | ti->shortname); | |
8981c758 | 228 | |
d9f719f1 | 229 | func (args, from_tty); |
8981c758 TT |
230 | |
231 | if (targetdebug) | |
d9f719f1 PA |
232 | fprintf_unfiltered (gdb_stdlog, "<- %s->open (%s, %d)\n", |
233 | ti->shortname, args, from_tty); | |
8981c758 TT |
234 | } |
235 | ||
d9f719f1 | 236 | /* See target.h. */ |
c22a2b88 TT |
237 | |
238 | void | |
d9f719f1 PA |
239 | add_target (const target_info &t, target_open_ftype *func, |
240 | completer_ftype *completer) | |
c22a2b88 TT |
241 | { |
242 | struct cmd_list_element *c; | |
243 | ||
d9f719f1 PA |
244 | auto &func_slot = target_factories[&t]; |
245 | if (func_slot != nullptr) | |
246 | internal_error (__FILE__, __LINE__, | |
247 | _("target already added (\"%s\")."), t.shortname); | |
248 | func_slot = func; | |
c906108c SS |
249 | |
250 | if (targetlist == NULL) | |
3b6acaee | 251 | add_basic_prefix_cmd ("target", class_run, _("\ |
1bedd215 | 252 | Connect to a target machine or process.\n\ |
c906108c SS |
253 | The first argument is the type or protocol of the target machine.\n\ |
254 | Remaining arguments are interpreted by the target protocol. For more\n\ | |
255 | information on the arguments for a particular protocol, type\n\ | |
1bedd215 | 256 | `help target ' followed by the protocol name."), |
3b6acaee | 257 | &targetlist, "target ", 0, &cmdlist); |
d9f719f1 PA |
258 | c = add_cmd (t.shortname, no_class, t.doc, &targetlist); |
259 | set_cmd_context (c, (void *) &t); | |
8981c758 | 260 | set_cmd_sfunc (c, open_target); |
9852c492 YQ |
261 | if (completer != NULL) |
262 | set_cmd_completer (c, completer); | |
263 | } | |
264 | ||
b48d48eb MM |
265 | /* See target.h. */ |
266 | ||
267 | void | |
d9f719f1 | 268 | add_deprecated_target_alias (const target_info &tinfo, const char *alias) |
b48d48eb MM |
269 | { |
270 | struct cmd_list_element *c; | |
271 | char *alt; | |
272 | ||
273 | /* If we use add_alias_cmd, here, we do not get the deprecated warning, | |
274 | see PR cli/15104. */ | |
d9f719f1 | 275 | c = add_cmd (alias, no_class, tinfo.doc, &targetlist); |
8981c758 | 276 | set_cmd_sfunc (c, open_target); |
d9f719f1 PA |
277 | set_cmd_context (c, (void *) &tinfo); |
278 | alt = xstrprintf ("target %s", tinfo.shortname); | |
b48d48eb MM |
279 | deprecate_cmd (c, alt); |
280 | } | |
281 | ||
c906108c SS |
282 | /* Stub functions */ |
283 | ||
7d85a9c0 JB |
284 | void |
285 | target_kill (void) | |
286 | { | |
8b88a78e | 287 | current_top_target ()->kill (); |
7d85a9c0 JB |
288 | } |
289 | ||
11cf8741 | 290 | void |
9cbe5fff | 291 | target_load (const char *arg, int from_tty) |
11cf8741 | 292 | { |
4e5d721f | 293 | target_dcache_invalidate (); |
8b88a78e | 294 | current_top_target ()->load (arg, from_tty); |
11cf8741 JM |
295 | } |
296 | ||
223ffa71 | 297 | /* Define it. */ |
5842f62a | 298 | |
e671cd59 PA |
299 | target_terminal_state target_terminal::m_terminal_state |
300 | = target_terminal_state::is_ours; | |
5842f62a | 301 | |
223ffa71 | 302 | /* See target/target.h. */ |
5842f62a PA |
303 | |
304 | void | |
223ffa71 | 305 | target_terminal::init (void) |
5842f62a | 306 | { |
8b88a78e | 307 | current_top_target ()->terminal_init (); |
5842f62a | 308 | |
e671cd59 | 309 | m_terminal_state = target_terminal_state::is_ours; |
5842f62a PA |
310 | } |
311 | ||
223ffa71 | 312 | /* See target/target.h. */ |
2f99e8fc | 313 | |
d9d2d8b6 | 314 | void |
223ffa71 | 315 | target_terminal::inferior (void) |
d9d2d8b6 | 316 | { |
41fd2b0f PA |
317 | struct ui *ui = current_ui; |
318 | ||
d9d2d8b6 | 319 | /* A background resume (``run&'') should leave GDB in control of the |
3b12939d PA |
320 | terminal. */ |
321 | if (ui->prompt_state != PROMPT_BLOCKED) | |
d9d2d8b6 PA |
322 | return; |
323 | ||
215d3118 PA |
324 | /* Since we always run the inferior in the main console (unless "set |
325 | inferior-tty" is in effect), when some UI other than the main one | |
223ffa71 TT |
326 | calls target_terminal::inferior, then we leave the main UI's |
327 | terminal settings as is. */ | |
215d3118 PA |
328 | if (ui != main_ui) |
329 | return; | |
330 | ||
d9d2d8b6 PA |
331 | /* If GDB is resuming the inferior in the foreground, install |
332 | inferior's terminal modes. */ | |
e671cd59 PA |
333 | |
334 | struct inferior *inf = current_inferior (); | |
335 | ||
336 | if (inf->terminal_state != target_terminal_state::is_inferior) | |
337 | { | |
8b88a78e | 338 | current_top_target ()->terminal_inferior (); |
e671cd59 PA |
339 | inf->terminal_state = target_terminal_state::is_inferior; |
340 | } | |
341 | ||
342 | m_terminal_state = target_terminal_state::is_inferior; | |
343 | ||
344 | /* If the user hit C-c before, pretend that it was hit right | |
345 | here. */ | |
346 | if (check_quit_flag ()) | |
347 | target_pass_ctrlc (); | |
348 | } | |
349 | ||
350 | /* See target/target.h. */ | |
351 | ||
352 | void | |
353 | target_terminal::restore_inferior (void) | |
354 | { | |
355 | struct ui *ui = current_ui; | |
356 | ||
357 | /* See target_terminal::inferior(). */ | |
358 | if (ui->prompt_state != PROMPT_BLOCKED || ui != main_ui) | |
359 | return; | |
360 | ||
361 | /* Restore the terminal settings of inferiors that were in the | |
362 | foreground but are now ours_for_output due to a temporary | |
363 | target_target::ours_for_output() call. */ | |
364 | ||
365 | { | |
366 | scoped_restore_current_inferior restore_inferior; | |
e671cd59 | 367 | |
84b68c77 | 368 | for (::inferior *inf : all_inferiors ()) |
e671cd59 PA |
369 | { |
370 | if (inf->terminal_state == target_terminal_state::is_ours_for_output) | |
371 | { | |
372 | set_current_inferior (inf); | |
8b88a78e | 373 | current_top_target ()->terminal_inferior (); |
e671cd59 PA |
374 | inf->terminal_state = target_terminal_state::is_inferior; |
375 | } | |
376 | } | |
377 | } | |
378 | ||
379 | m_terminal_state = target_terminal_state::is_inferior; | |
93692b58 PA |
380 | |
381 | /* If the user hit C-c before, pretend that it was hit right | |
382 | here. */ | |
383 | if (check_quit_flag ()) | |
384 | target_pass_ctrlc (); | |
5842f62a PA |
385 | } |
386 | ||
e671cd59 PA |
387 | /* Switch terminal state to DESIRED_STATE, either is_ours, or |
388 | is_ours_for_output. */ | |
389 | ||
390 | static void | |
391 | target_terminal_is_ours_kind (target_terminal_state desired_state) | |
392 | { | |
393 | scoped_restore_current_inferior restore_inferior; | |
e671cd59 PA |
394 | |
395 | /* Must do this in two passes. First, have all inferiors save the | |
396 | current terminal settings. Then, after all inferiors have add a | |
397 | chance to safely save the terminal settings, restore GDB's | |
398 | terminal settings. */ | |
399 | ||
08036331 | 400 | for (inferior *inf : all_inferiors ()) |
e671cd59 PA |
401 | { |
402 | if (inf->terminal_state == target_terminal_state::is_inferior) | |
403 | { | |
404 | set_current_inferior (inf); | |
8b88a78e | 405 | current_top_target ()->terminal_save_inferior (); |
e671cd59 PA |
406 | } |
407 | } | |
408 | ||
08036331 | 409 | for (inferior *inf : all_inferiors ()) |
e671cd59 PA |
410 | { |
411 | /* Note we don't check is_inferior here like above because we | |
412 | need to handle 'is_ours_for_output -> is_ours' too. Careful | |
413 | to never transition from 'is_ours' to 'is_ours_for_output', | |
414 | though. */ | |
415 | if (inf->terminal_state != target_terminal_state::is_ours | |
416 | && inf->terminal_state != desired_state) | |
417 | { | |
418 | set_current_inferior (inf); | |
419 | if (desired_state == target_terminal_state::is_ours) | |
8b88a78e | 420 | current_top_target ()->terminal_ours (); |
e671cd59 | 421 | else if (desired_state == target_terminal_state::is_ours_for_output) |
8b88a78e | 422 | current_top_target ()->terminal_ours_for_output (); |
e671cd59 PA |
423 | else |
424 | gdb_assert_not_reached ("unhandled desired state"); | |
425 | inf->terminal_state = desired_state; | |
426 | } | |
427 | } | |
428 | } | |
429 | ||
223ffa71 | 430 | /* See target/target.h. */ |
5842f62a PA |
431 | |
432 | void | |
223ffa71 | 433 | target_terminal::ours () |
5842f62a | 434 | { |
41fd2b0f PA |
435 | struct ui *ui = current_ui; |
436 | ||
223ffa71 | 437 | /* See target_terminal::inferior. */ |
215d3118 PA |
438 | if (ui != main_ui) |
439 | return; | |
440 | ||
e671cd59 | 441 | if (m_terminal_state == target_terminal_state::is_ours) |
5842f62a PA |
442 | return; |
443 | ||
e671cd59 PA |
444 | target_terminal_is_ours_kind (target_terminal_state::is_ours); |
445 | m_terminal_state = target_terminal_state::is_ours; | |
5842f62a PA |
446 | } |
447 | ||
223ffa71 | 448 | /* See target/target.h. */ |
5842f62a PA |
449 | |
450 | void | |
223ffa71 | 451 | target_terminal::ours_for_output () |
5842f62a | 452 | { |
215d3118 PA |
453 | struct ui *ui = current_ui; |
454 | ||
223ffa71 | 455 | /* See target_terminal::inferior. */ |
215d3118 PA |
456 | if (ui != main_ui) |
457 | return; | |
458 | ||
e671cd59 | 459 | if (!target_terminal::is_inferior ()) |
5842f62a | 460 | return; |
e671cd59 PA |
461 | |
462 | target_terminal_is_ours_kind (target_terminal_state::is_ours_for_output); | |
463 | target_terminal::m_terminal_state = target_terminal_state::is_ours_for_output; | |
d9d2d8b6 | 464 | } |
136d6dae | 465 | |
223ffa71 TT |
466 | /* See target/target.h. */ |
467 | ||
468 | void | |
469 | target_terminal::info (const char *arg, int from_tty) | |
470 | { | |
8b88a78e | 471 | current_top_target ()->terminal_info (arg, from_tty); |
223ffa71 TT |
472 | } |
473 | ||
b0ed115f TT |
474 | /* See target.h. */ |
475 | ||
20f0d60d | 476 | bool |
b0ed115f TT |
477 | target_supports_terminal_ours (void) |
478 | { | |
5b6d1e4f PA |
479 | /* The current top target is the target at the top of the target |
480 | stack of the current inferior. While normally there's always an | |
481 | inferior, we must check for nullptr here because we can get here | |
482 | very early during startup, before the initial inferior is first | |
483 | created. */ | |
484 | inferior *inf = current_inferior (); | |
20f0d60d | 485 | |
5b6d1e4f | 486 | if (inf == nullptr) |
20f0d60d | 487 | return false; |
5b6d1e4f | 488 | return inf->top_target ()->supports_terminal_ours (); |
b0ed115f TT |
489 | } |
490 | ||
c906108c | 491 | static void |
fba45db2 | 492 | tcomplain (void) |
c906108c | 493 | { |
8a3fe4f8 | 494 | error (_("You can't do that when your target is `%s'"), |
8b88a78e | 495 | current_top_target ()->shortname ()); |
c906108c SS |
496 | } |
497 | ||
498 | void | |
fba45db2 | 499 | noprocess (void) |
c906108c | 500 | { |
8a3fe4f8 | 501 | error (_("You can't do that without a process to debug.")); |
c906108c SS |
502 | } |
503 | ||
c906108c | 504 | static void |
0a4f40a2 | 505 | default_terminal_info (struct target_ops *self, const char *args, int from_tty) |
c906108c | 506 | { |
a3f17187 | 507 | printf_unfiltered (_("No saved terminal information.\n")); |
c906108c SS |
508 | } |
509 | ||
0ef643c8 JB |
510 | /* A default implementation for the to_get_ada_task_ptid target method. |
511 | ||
512 | This function builds the PTID by using both LWP and TID as part of | |
513 | the PTID lwp and tid elements. The pid used is the pid of the | |
514 | inferior_ptid. */ | |
515 | ||
2c0b251b | 516 | static ptid_t |
1e6b91a4 | 517 | default_get_ada_task_ptid (struct target_ops *self, long lwp, long tid) |
0ef643c8 | 518 | { |
e99b03dc | 519 | return ptid_t (inferior_ptid.pid (), lwp, tid); |
0ef643c8 JB |
520 | } |
521 | ||
32231432 | 522 | static enum exec_direction_kind |
4c612759 | 523 | default_execution_direction (struct target_ops *self) |
32231432 | 524 | { |
05374cfd | 525 | if (!target_can_execute_reverse ()) |
32231432 PA |
526 | return EXEC_FORWARD; |
527 | else if (!target_can_async_p ()) | |
528 | return EXEC_FORWARD; | |
529 | else | |
530 | gdb_assert_not_reached ("\ | |
531 | to_execution_direction must be implemented for reverse async"); | |
532 | } | |
533 | ||
a1740ee1 | 534 | /* See target.h. */ |
c906108c | 535 | |
5b6d1e4f PA |
536 | void |
537 | decref_target (target_ops *t) | |
538 | { | |
539 | t->decref (); | |
540 | if (t->refcount () == 0) | |
121b3efd PA |
541 | { |
542 | if (t->stratum () == process_stratum) | |
543 | connection_list_remove (as_process_stratum_target (t)); | |
544 | target_close (t); | |
545 | } | |
5b6d1e4f PA |
546 | } |
547 | ||
548 | /* See target.h. */ | |
549 | ||
b26a4dcb | 550 | void |
a1740ee1 | 551 | target_stack::push (target_ops *t) |
c906108c | 552 | { |
5b6d1e4f PA |
553 | t->incref (); |
554 | ||
66b4deae PA |
555 | strata stratum = t->stratum (); |
556 | ||
121b3efd PA |
557 | if (stratum == process_stratum) |
558 | connection_list_add (as_process_stratum_target (t)); | |
559 | ||
5b6d1e4f PA |
560 | /* If there's already a target at this stratum, remove it. */ |
561 | ||
66b4deae | 562 | if (m_stack[stratum] != NULL) |
494409bb | 563 | unpush (m_stack[stratum]); |
c906108c | 564 | |
a1740ee1 | 565 | /* Now add the new one. */ |
66b4deae | 566 | m_stack[stratum] = t; |
5d502164 | 567 | |
66b4deae PA |
568 | if (m_top < stratum) |
569 | m_top = stratum; | |
a1740ee1 PA |
570 | } |
571 | ||
572 | /* See target.h. */ | |
c906108c | 573 | |
a1740ee1 PA |
574 | void |
575 | push_target (struct target_ops *t) | |
576 | { | |
5b6d1e4f | 577 | current_inferior ()->push_target (t); |
c906108c SS |
578 | } |
579 | ||
5b6d1e4f | 580 | /* See target.h. */ |
dea57a62 TT |
581 | |
582 | void | |
583 | push_target (target_ops_up &&t) | |
584 | { | |
5b6d1e4f | 585 | current_inferior ()->push_target (t.get ()); |
dea57a62 TT |
586 | t.release (); |
587 | } | |
588 | ||
a1740ee1 | 589 | /* See target.h. */ |
c906108c SS |
590 | |
591 | int | |
fba45db2 | 592 | unpush_target (struct target_ops *t) |
a1740ee1 | 593 | { |
5b6d1e4f | 594 | return current_inferior ()->unpush_target (t); |
a1740ee1 PA |
595 | } |
596 | ||
597 | /* See target.h. */ | |
598 | ||
599 | bool | |
600 | target_stack::unpush (target_ops *t) | |
c906108c | 601 | { |
1688cb29 TT |
602 | gdb_assert (t != NULL); |
603 | ||
66b4deae PA |
604 | strata stratum = t->stratum (); |
605 | ||
606 | if (stratum == dummy_stratum) | |
c8d104ad | 607 | internal_error (__FILE__, __LINE__, |
9b20d036 | 608 | _("Attempt to unpush the dummy target")); |
c8d104ad | 609 | |
a1740ee1 PA |
610 | /* Look for the specified target. Note that a target can only occur |
611 | once in the target stack. */ | |
c906108c | 612 | |
66b4deae | 613 | if (m_stack[stratum] != t) |
258b763a | 614 | { |
a1740ee1 PA |
615 | /* If T wasn't pushed, quit. Only open targets should be |
616 | closed. */ | |
617 | return false; | |
258b763a | 618 | } |
c906108c | 619 | |
c378eb4e | 620 | /* Unchain the target. */ |
66b4deae | 621 | m_stack[stratum] = NULL; |
a1740ee1 | 622 | |
66b4deae PA |
623 | if (m_top == stratum) |
624 | m_top = t->beneath ()->stratum (); | |
c906108c | 625 | |
5b6d1e4f PA |
626 | /* Finally close the target, if there are no inferiors |
627 | referencing this target still. Note we do this after unchaining, | |
628 | so any target method calls from within the target_close | |
629 | implementation don't end up in T anymore. Do leave the target | |
630 | open if we have are other inferiors referencing this target | |
631 | still. */ | |
632 | decref_target (t); | |
305436e0 | 633 | |
a1740ee1 | 634 | return true; |
c906108c SS |
635 | } |
636 | ||
915ef8b1 PA |
637 | /* Unpush TARGET and assert that it worked. */ |
638 | ||
639 | static void | |
640 | unpush_target_and_assert (struct target_ops *target) | |
641 | { | |
642 | if (!unpush_target (target)) | |
643 | { | |
644 | fprintf_unfiltered (gdb_stderr, | |
645 | "pop_all_targets couldn't find target %s\n", | |
f6ac5f3d | 646 | target->shortname ()); |
915ef8b1 PA |
647 | internal_error (__FILE__, __LINE__, |
648 | _("failed internal consistency check")); | |
649 | } | |
650 | } | |
651 | ||
aa76d38d | 652 | void |
460014f5 | 653 | pop_all_targets_above (enum strata above_stratum) |
aa76d38d | 654 | { |
66b4deae | 655 | while ((int) (current_top_target ()->stratum ()) > (int) above_stratum) |
8b88a78e | 656 | unpush_target_and_assert (current_top_target ()); |
915ef8b1 PA |
657 | } |
658 | ||
659 | /* See target.h. */ | |
660 | ||
661 | void | |
662 | pop_all_targets_at_and_above (enum strata stratum) | |
663 | { | |
66b4deae | 664 | while ((int) (current_top_target ()->stratum ()) >= (int) stratum) |
8b88a78e | 665 | unpush_target_and_assert (current_top_target ()); |
aa76d38d PA |
666 | } |
667 | ||
87ab71f0 | 668 | void |
460014f5 | 669 | pop_all_targets (void) |
87ab71f0 | 670 | { |
460014f5 | 671 | pop_all_targets_above (dummy_stratum); |
87ab71f0 PA |
672 | } |
673 | ||
5b6d1e4f PA |
674 | /* Return true if T is now pushed in the current inferior's target |
675 | stack. Return false otherwise. */ | |
c0edd9ed | 676 | |
5b6d1e4f PA |
677 | bool |
678 | target_is_pushed (target_ops *t) | |
c0edd9ed | 679 | { |
5b6d1e4f | 680 | return current_inferior ()->target_is_pushed (t); |
c0edd9ed JK |
681 | } |
682 | ||
f0f9ff95 TT |
683 | /* Default implementation of to_get_thread_local_address. */ |
684 | ||
685 | static void | |
686 | generic_tls_error (void) | |
687 | { | |
688 | throw_error (TLS_GENERIC_ERROR, | |
689 | _("Cannot find thread-local variables on this target")); | |
690 | } | |
691 | ||
72f5cf0e | 692 | /* Using the objfile specified in OBJFILE, find the address for the |
9e35dae4 DJ |
693 | current thread's thread-local storage with offset OFFSET. */ |
694 | CORE_ADDR | |
695 | target_translate_tls_address (struct objfile *objfile, CORE_ADDR offset) | |
696 | { | |
697 | volatile CORE_ADDR addr = 0; | |
8b88a78e | 698 | struct target_ops *target = current_top_target (); |
6e056c81 | 699 | struct gdbarch *gdbarch = target_gdbarch (); |
9e35dae4 | 700 | |
6e056c81 | 701 | if (gdbarch_fetch_tls_load_module_address_p (gdbarch)) |
9e35dae4 DJ |
702 | { |
703 | ptid_t ptid = inferior_ptid; | |
9e35dae4 | 704 | |
a70b8144 | 705 | try |
9e35dae4 DJ |
706 | { |
707 | CORE_ADDR lm_addr; | |
708 | ||
709 | /* Fetch the load module address for this objfile. */ | |
6e056c81 | 710 | lm_addr = gdbarch_fetch_tls_load_module_address (gdbarch, |
9e35dae4 | 711 | objfile); |
9e35dae4 | 712 | |
6e056c81 JB |
713 | if (gdbarch_get_thread_local_address_p (gdbarch)) |
714 | addr = gdbarch_get_thread_local_address (gdbarch, ptid, lm_addr, | |
715 | offset); | |
716 | else | |
717 | addr = target->get_thread_local_address (ptid, lm_addr, offset); | |
9e35dae4 DJ |
718 | } |
719 | /* If an error occurred, print TLS related messages here. Otherwise, | |
720 | throw the error to some higher catcher. */ | |
230d2906 | 721 | catch (const gdb_exception &ex) |
9e35dae4 DJ |
722 | { |
723 | int objfile_is_library = (objfile->flags & OBJF_SHARED); | |
724 | ||
725 | switch (ex.error) | |
726 | { | |
727 | case TLS_NO_LIBRARY_SUPPORT_ERROR: | |
3e43a32a MS |
728 | error (_("Cannot find thread-local variables " |
729 | "in this thread library.")); | |
9e35dae4 DJ |
730 | break; |
731 | case TLS_LOAD_MODULE_NOT_FOUND_ERROR: | |
732 | if (objfile_is_library) | |
733 | error (_("Cannot find shared library `%s' in dynamic" | |
4262abfb | 734 | " linker's load module list"), objfile_name (objfile)); |
9e35dae4 DJ |
735 | else |
736 | error (_("Cannot find executable file `%s' in dynamic" | |
4262abfb | 737 | " linker's load module list"), objfile_name (objfile)); |
9e35dae4 DJ |
738 | break; |
739 | case TLS_NOT_ALLOCATED_YET_ERROR: | |
740 | if (objfile_is_library) | |
741 | error (_("The inferior has not yet allocated storage for" | |
742 | " thread-local variables in\n" | |
743 | "the shared library `%s'\n" | |
744 | "for %s"), | |
a068643d TT |
745 | objfile_name (objfile), |
746 | target_pid_to_str (ptid).c_str ()); | |
9e35dae4 DJ |
747 | else |
748 | error (_("The inferior has not yet allocated storage for" | |
749 | " thread-local variables in\n" | |
750 | "the executable `%s'\n" | |
751 | "for %s"), | |
a068643d TT |
752 | objfile_name (objfile), |
753 | target_pid_to_str (ptid).c_str ()); | |
9e35dae4 DJ |
754 | break; |
755 | case TLS_GENERIC_ERROR: | |
756 | if (objfile_is_library) | |
757 | error (_("Cannot find thread-local storage for %s, " | |
758 | "shared library %s:\n%s"), | |
a068643d | 759 | target_pid_to_str (ptid).c_str (), |
3d6e9d23 | 760 | objfile_name (objfile), ex.what ()); |
9e35dae4 DJ |
761 | else |
762 | error (_("Cannot find thread-local storage for %s, " | |
763 | "executable file %s:\n%s"), | |
a068643d | 764 | target_pid_to_str (ptid).c_str (), |
3d6e9d23 | 765 | objfile_name (objfile), ex.what ()); |
9e35dae4 DJ |
766 | break; |
767 | default: | |
eedc3f4f | 768 | throw; |
9e35dae4 DJ |
769 | break; |
770 | } | |
771 | } | |
772 | } | |
9e35dae4 DJ |
773 | else |
774 | error (_("Cannot find thread-local variables on this target")); | |
775 | ||
776 | return addr; | |
777 | } | |
778 | ||
6be7b56e | 779 | const char * |
01cb8804 | 780 | target_xfer_status_to_string (enum target_xfer_status status) |
6be7b56e PA |
781 | { |
782 | #define CASE(X) case X: return #X | |
01cb8804 | 783 | switch (status) |
6be7b56e PA |
784 | { |
785 | CASE(TARGET_XFER_E_IO); | |
bc113b4e | 786 | CASE(TARGET_XFER_UNAVAILABLE); |
6be7b56e PA |
787 | default: |
788 | return "<unknown>"; | |
789 | } | |
790 | #undef CASE | |
791 | }; | |
792 | ||
793 | ||
66920317 | 794 | /* See target.h. */ |
c906108c | 795 | |
66920317 TT |
796 | gdb::unique_xmalloc_ptr<char> |
797 | target_read_string (CORE_ADDR memaddr, int len, int *bytes_read) | |
c906108c | 798 | { |
670e35fa | 799 | gdb::unique_xmalloc_ptr<gdb_byte> buffer; |
5d502164 | 800 | |
66920317 TT |
801 | int ignore; |
802 | if (bytes_read == nullptr) | |
803 | bytes_read = &ignore; | |
804 | ||
670e35fa TT |
805 | /* Note that the endian-ness does not matter here. */ |
806 | int errcode = read_string (memaddr, -1, 1, len, BFD_ENDIAN_LITTLE, | |
66920317 TT |
807 | &buffer, bytes_read); |
808 | if (errcode != 0) | |
809 | return {}; | |
670e35fa | 810 | |
66920317 | 811 | return gdb::unique_xmalloc_ptr<char> ((char *) buffer.release ()); |
c906108c SS |
812 | } |
813 | ||
07b82ea5 PA |
814 | struct target_section_table * |
815 | target_get_section_table (struct target_ops *target) | |
816 | { | |
f6ac5f3d | 817 | return target->get_section_table (); |
07b82ea5 PA |
818 | } |
819 | ||
8db32d44 | 820 | /* Find a section containing ADDR. */ |
07b82ea5 | 821 | |
0542c86d | 822 | struct target_section * |
8db32d44 AC |
823 | target_section_by_addr (struct target_ops *target, CORE_ADDR addr) |
824 | { | |
07b82ea5 | 825 | struct target_section_table *table = target_get_section_table (target); |
0542c86d | 826 | struct target_section *secp; |
07b82ea5 PA |
827 | |
828 | if (table == NULL) | |
829 | return NULL; | |
830 | ||
831 | for (secp = table->sections; secp < table->sections_end; secp++) | |
8db32d44 AC |
832 | { |
833 | if (addr >= secp->addr && addr < secp->endaddr) | |
834 | return secp; | |
835 | } | |
836 | return NULL; | |
837 | } | |
838 | ||
0fec99e8 PA |
839 | |
840 | /* Helper for the memory xfer routines. Checks the attributes of the | |
841 | memory region of MEMADDR against the read or write being attempted. | |
842 | If the access is permitted returns true, otherwise returns false. | |
843 | REGION_P is an optional output parameter. If not-NULL, it is | |
844 | filled with a pointer to the memory region of MEMADDR. REG_LEN | |
845 | returns LEN trimmed to the end of the region. This is how much the | |
846 | caller can continue requesting, if the access is permitted. A | |
847 | single xfer request must not straddle memory region boundaries. */ | |
848 | ||
849 | static int | |
850 | memory_xfer_check_region (gdb_byte *readbuf, const gdb_byte *writebuf, | |
851 | ULONGEST memaddr, ULONGEST len, ULONGEST *reg_len, | |
852 | struct mem_region **region_p) | |
853 | { | |
854 | struct mem_region *region; | |
855 | ||
856 | region = lookup_mem_region (memaddr); | |
857 | ||
858 | if (region_p != NULL) | |
859 | *region_p = region; | |
860 | ||
861 | switch (region->attrib.mode) | |
862 | { | |
863 | case MEM_RO: | |
864 | if (writebuf != NULL) | |
865 | return 0; | |
866 | break; | |
867 | ||
868 | case MEM_WO: | |
869 | if (readbuf != NULL) | |
870 | return 0; | |
871 | break; | |
872 | ||
873 | case MEM_FLASH: | |
874 | /* We only support writing to flash during "load" for now. */ | |
875 | if (writebuf != NULL) | |
876 | error (_("Writing to flash memory forbidden in this context")); | |
877 | break; | |
878 | ||
879 | case MEM_NONE: | |
880 | return 0; | |
881 | } | |
882 | ||
883 | /* region->hi == 0 means there's no upper bound. */ | |
884 | if (memaddr + len < region->hi || region->hi == 0) | |
885 | *reg_len = len; | |
886 | else | |
887 | *reg_len = region->hi - memaddr; | |
888 | ||
889 | return 1; | |
890 | } | |
891 | ||
9f713294 YQ |
892 | /* Read memory from more than one valid target. A core file, for |
893 | instance, could have some of memory but delegate other bits to | |
894 | the target below it. So, we must manually try all targets. */ | |
895 | ||
cc9f16aa | 896 | enum target_xfer_status |
17fde6d0 | 897 | raw_memory_xfer_partial (struct target_ops *ops, gdb_byte *readbuf, |
9b409511 YQ |
898 | const gdb_byte *writebuf, ULONGEST memaddr, LONGEST len, |
899 | ULONGEST *xfered_len) | |
9f713294 | 900 | { |
9b409511 | 901 | enum target_xfer_status res; |
9f713294 YQ |
902 | |
903 | do | |
904 | { | |
f6ac5f3d PA |
905 | res = ops->xfer_partial (TARGET_OBJECT_MEMORY, NULL, |
906 | readbuf, writebuf, memaddr, len, | |
907 | xfered_len); | |
9b409511 | 908 | if (res == TARGET_XFER_OK) |
9f713294 YQ |
909 | break; |
910 | ||
633785ff | 911 | /* Stop if the target reports that the memory is not available. */ |
bc113b4e | 912 | if (res == TARGET_XFER_UNAVAILABLE) |
633785ff MM |
913 | break; |
914 | ||
2735d421 KB |
915 | /* Don't continue past targets which have all the memory. |
916 | At one time, this code was necessary to read data from | |
917 | executables / shared libraries when data for the requested | |
918 | addresses weren't available in the core file. But now the | |
919 | core target handles this case itself. */ | |
f6ac5f3d | 920 | if (ops->has_all_memory ()) |
9f713294 YQ |
921 | break; |
922 | ||
b6a8c27b | 923 | ops = ops->beneath (); |
9f713294 YQ |
924 | } |
925 | while (ops != NULL); | |
926 | ||
0f26cec1 PA |
927 | /* The cache works at the raw memory level. Make sure the cache |
928 | gets updated with raw contents no matter what kind of memory | |
929 | object was originally being written. Note we do write-through | |
930 | first, so that if it fails, we don't write to the cache contents | |
931 | that never made it to the target. */ | |
932 | if (writebuf != NULL | |
d7e15655 | 933 | && inferior_ptid != null_ptid |
0f26cec1 PA |
934 | && target_dcache_init_p () |
935 | && (stack_cache_enabled_p () || code_cache_enabled_p ())) | |
936 | { | |
937 | DCACHE *dcache = target_dcache_get (); | |
938 | ||
939 | /* Note that writing to an area of memory which wasn't present | |
940 | in the cache doesn't cause it to be loaded in. */ | |
941 | dcache_update (dcache, res, memaddr, writebuf, *xfered_len); | |
942 | } | |
943 | ||
9f713294 YQ |
944 | return res; |
945 | } | |
946 | ||
7f79c47e DE |
947 | /* Perform a partial memory transfer. |
948 | For docs see target.h, to_xfer_partial. */ | |
cf7a04e8 | 949 | |
9b409511 | 950 | static enum target_xfer_status |
f0ba3972 | 951 | memory_xfer_partial_1 (struct target_ops *ops, enum target_object object, |
17fde6d0 | 952 | gdb_byte *readbuf, const gdb_byte *writebuf, ULONGEST memaddr, |
9b409511 | 953 | ULONGEST len, ULONGEST *xfered_len) |
0779438d | 954 | { |
9b409511 | 955 | enum target_xfer_status res; |
0fec99e8 | 956 | ULONGEST reg_len; |
cf7a04e8 | 957 | struct mem_region *region; |
4e5d721f | 958 | struct inferior *inf; |
cf7a04e8 | 959 | |
07b82ea5 PA |
960 | /* For accesses to unmapped overlay sections, read directly from |
961 | files. Must do this first, as MEMADDR may need adjustment. */ | |
962 | if (readbuf != NULL && overlay_debugging) | |
963 | { | |
964 | struct obj_section *section = find_pc_overlay (memaddr); | |
5d502164 | 965 | |
07b82ea5 PA |
966 | if (pc_in_unmapped_range (memaddr, section)) |
967 | { | |
968 | struct target_section_table *table | |
969 | = target_get_section_table (ops); | |
970 | const char *section_name = section->the_bfd_section->name; | |
5d502164 | 971 | |
07b82ea5 | 972 | memaddr = overlay_mapped_address (memaddr, section); |
e56cb451 KB |
973 | |
974 | auto match_cb = [=] (const struct target_section *s) | |
975 | { | |
976 | return (strcmp (section_name, s->the_bfd_section->name) == 0); | |
977 | }; | |
978 | ||
07b82ea5 | 979 | return section_table_xfer_memory_partial (readbuf, writebuf, |
9b409511 | 980 | memaddr, len, xfered_len, |
07b82ea5 PA |
981 | table->sections, |
982 | table->sections_end, | |
e56cb451 | 983 | match_cb); |
07b82ea5 PA |
984 | } |
985 | } | |
986 | ||
987 | /* Try the executable files, if "trust-readonly-sections" is set. */ | |
cf7a04e8 DJ |
988 | if (readbuf != NULL && trust_readonly) |
989 | { | |
0542c86d | 990 | struct target_section *secp; |
07b82ea5 | 991 | struct target_section_table *table; |
cf7a04e8 DJ |
992 | |
993 | secp = target_section_by_addr (ops, memaddr); | |
994 | if (secp != NULL | |
fd361982 | 995 | && (bfd_section_flags (secp->the_bfd_section) & SEC_READONLY)) |
07b82ea5 PA |
996 | { |
997 | table = target_get_section_table (ops); | |
998 | return section_table_xfer_memory_partial (readbuf, writebuf, | |
9b409511 | 999 | memaddr, len, xfered_len, |
07b82ea5 | 1000 | table->sections, |
e56cb451 | 1001 | table->sections_end); |
07b82ea5 | 1002 | } |
98646950 UW |
1003 | } |
1004 | ||
cf7a04e8 | 1005 | /* Try GDB's internal data cache. */ |
cf7a04e8 | 1006 | |
0fec99e8 PA |
1007 | if (!memory_xfer_check_region (readbuf, writebuf, memaddr, len, ®_len, |
1008 | ®ion)) | |
1009 | return TARGET_XFER_E_IO; | |
cf7a04e8 | 1010 | |
d7e15655 | 1011 | if (inferior_ptid != null_ptid) |
00431a78 | 1012 | inf = current_inferior (); |
6c95b8df PA |
1013 | else |
1014 | inf = NULL; | |
4e5d721f DE |
1015 | |
1016 | if (inf != NULL | |
0f26cec1 | 1017 | && readbuf != NULL |
2f4d8875 PA |
1018 | /* The dcache reads whole cache lines; that doesn't play well |
1019 | with reading from a trace buffer, because reading outside of | |
1020 | the collected memory range fails. */ | |
1021 | && get_traceframe_number () == -1 | |
4e5d721f | 1022 | && (region->attrib.cache |
29453a14 YQ |
1023 | || (stack_cache_enabled_p () && object == TARGET_OBJECT_STACK_MEMORY) |
1024 | || (code_cache_enabled_p () && object == TARGET_OBJECT_CODE_MEMORY))) | |
cf7a04e8 | 1025 | { |
2a2f9fe4 YQ |
1026 | DCACHE *dcache = target_dcache_get_or_init (); |
1027 | ||
0f26cec1 PA |
1028 | return dcache_read_memory_partial (ops, dcache, memaddr, readbuf, |
1029 | reg_len, xfered_len); | |
cf7a04e8 DJ |
1030 | } |
1031 | ||
1032 | /* If none of those methods found the memory we wanted, fall back | |
1033 | to a target partial transfer. Normally a single call to | |
1034 | to_xfer_partial is enough; if it doesn't recognize an object | |
1035 | it will call the to_xfer_partial of the next target down. | |
1036 | But for memory this won't do. Memory is the only target | |
9b409511 YQ |
1037 | object which can be read from more than one valid target. |
1038 | A core file, for instance, could have some of memory but | |
1039 | delegate other bits to the target below it. So, we must | |
1040 | manually try all targets. */ | |
1041 | ||
1042 | res = raw_memory_xfer_partial (ops, readbuf, writebuf, memaddr, reg_len, | |
1043 | xfered_len); | |
cf7a04e8 DJ |
1044 | |
1045 | /* If we still haven't got anything, return the last error. We | |
1046 | give up. */ | |
1047 | return res; | |
0779438d AC |
1048 | } |
1049 | ||
f0ba3972 PA |
1050 | /* Perform a partial memory transfer. For docs see target.h, |
1051 | to_xfer_partial. */ | |
1052 | ||
9b409511 | 1053 | static enum target_xfer_status |
f0ba3972 | 1054 | memory_xfer_partial (struct target_ops *ops, enum target_object object, |
9b409511 YQ |
1055 | gdb_byte *readbuf, const gdb_byte *writebuf, |
1056 | ULONGEST memaddr, ULONGEST len, ULONGEST *xfered_len) | |
f0ba3972 | 1057 | { |
9b409511 | 1058 | enum target_xfer_status res; |
f0ba3972 PA |
1059 | |
1060 | /* Zero length requests are ok and require no work. */ | |
1061 | if (len == 0) | |
9b409511 | 1062 | return TARGET_XFER_EOF; |
f0ba3972 | 1063 | |
a738ea1d YQ |
1064 | memaddr = address_significant (target_gdbarch (), memaddr); |
1065 | ||
f0ba3972 PA |
1066 | /* Fill in READBUF with breakpoint shadows, or WRITEBUF with |
1067 | breakpoint insns, thus hiding out from higher layers whether | |
1068 | there are software breakpoints inserted in the code stream. */ | |
1069 | if (readbuf != NULL) | |
1070 | { | |
9b409511 YQ |
1071 | res = memory_xfer_partial_1 (ops, object, readbuf, NULL, memaddr, len, |
1072 | xfered_len); | |
f0ba3972 | 1073 | |
9b409511 | 1074 | if (res == TARGET_XFER_OK && !show_memory_breakpoints) |
c63528fc | 1075 | breakpoint_xfer_memory (readbuf, NULL, NULL, memaddr, *xfered_len); |
f0ba3972 PA |
1076 | } |
1077 | else | |
1078 | { | |
67c059c2 AB |
1079 | /* A large write request is likely to be partially satisfied |
1080 | by memory_xfer_partial_1. We will continually malloc | |
1081 | and free a copy of the entire write request for breakpoint | |
1082 | shadow handling even though we only end up writing a small | |
09c98b44 DB |
1083 | subset of it. Cap writes to a limit specified by the target |
1084 | to mitigate this. */ | |
f6ac5f3d | 1085 | len = std::min (ops->get_memory_xfer_limit (), len); |
67c059c2 | 1086 | |
26fcd5d7 TT |
1087 | gdb::byte_vector buf (writebuf, writebuf + len); |
1088 | breakpoint_xfer_memory (NULL, buf.data (), writebuf, memaddr, len); | |
1089 | res = memory_xfer_partial_1 (ops, object, NULL, buf.data (), memaddr, len, | |
9b409511 | 1090 | xfered_len); |
f0ba3972 PA |
1091 | } |
1092 | ||
1093 | return res; | |
1094 | } | |
1095 | ||
cb85b21b TT |
1096 | scoped_restore_tmpl<int> |
1097 | make_scoped_restore_show_memory_breakpoints (int show) | |
8defab1a | 1098 | { |
cb85b21b | 1099 | return make_scoped_restore (&show_memory_breakpoints, show); |
8defab1a DJ |
1100 | } |
1101 | ||
7f79c47e DE |
1102 | /* For docs see target.h, to_xfer_partial. */ |
1103 | ||
9b409511 | 1104 | enum target_xfer_status |
27394598 AC |
1105 | target_xfer_partial (struct target_ops *ops, |
1106 | enum target_object object, const char *annex, | |
4ac248ca | 1107 | gdb_byte *readbuf, const gdb_byte *writebuf, |
9b409511 YQ |
1108 | ULONGEST offset, ULONGEST len, |
1109 | ULONGEST *xfered_len) | |
27394598 | 1110 | { |
9b409511 | 1111 | enum target_xfer_status retval; |
27394598 | 1112 | |
ce6d0892 YQ |
1113 | /* Transfer is done when LEN is zero. */ |
1114 | if (len == 0) | |
9b409511 | 1115 | return TARGET_XFER_EOF; |
ce6d0892 | 1116 | |
d914c394 SS |
1117 | if (writebuf && !may_write_memory) |
1118 | error (_("Writing to memory is not allowed (addr %s, len %s)"), | |
1119 | core_addr_to_string_nz (offset), plongest (len)); | |
1120 | ||
9b409511 YQ |
1121 | *xfered_len = 0; |
1122 | ||
cf7a04e8 DJ |
1123 | /* If this is a memory transfer, let the memory-specific code |
1124 | have a look at it instead. Memory transfers are more | |
1125 | complicated. */ | |
29453a14 YQ |
1126 | if (object == TARGET_OBJECT_MEMORY || object == TARGET_OBJECT_STACK_MEMORY |
1127 | || object == TARGET_OBJECT_CODE_MEMORY) | |
4e5d721f | 1128 | retval = memory_xfer_partial (ops, object, readbuf, |
9b409511 | 1129 | writebuf, offset, len, xfered_len); |
9f713294 | 1130 | else if (object == TARGET_OBJECT_RAW_MEMORY) |
cf7a04e8 | 1131 | { |
0fec99e8 PA |
1132 | /* Skip/avoid accessing the target if the memory region |
1133 | attributes block the access. Check this here instead of in | |
1134 | raw_memory_xfer_partial as otherwise we'd end up checking | |
1135 | this twice in the case of the memory_xfer_partial path is | |
1136 | taken; once before checking the dcache, and another in the | |
1137 | tail call to raw_memory_xfer_partial. */ | |
1138 | if (!memory_xfer_check_region (readbuf, writebuf, offset, len, &len, | |
1139 | NULL)) | |
1140 | return TARGET_XFER_E_IO; | |
1141 | ||
9f713294 | 1142 | /* Request the normal memory object from other layers. */ |
9b409511 YQ |
1143 | retval = raw_memory_xfer_partial (ops, readbuf, writebuf, offset, len, |
1144 | xfered_len); | |
cf7a04e8 | 1145 | } |
9f713294 | 1146 | else |
f6ac5f3d PA |
1147 | retval = ops->xfer_partial (object, annex, readbuf, |
1148 | writebuf, offset, len, xfered_len); | |
cf7a04e8 | 1149 | |
27394598 AC |
1150 | if (targetdebug) |
1151 | { | |
1152 | const unsigned char *myaddr = NULL; | |
1153 | ||
1154 | fprintf_unfiltered (gdb_stdlog, | |
3e43a32a | 1155 | "%s:target_xfer_partial " |
9b409511 | 1156 | "(%d, %s, %s, %s, %s, %s) = %d, %s", |
f6ac5f3d | 1157 | ops->shortname (), |
27394598 AC |
1158 | (int) object, |
1159 | (annex ? annex : "(null)"), | |
53b71562 JB |
1160 | host_address_to_string (readbuf), |
1161 | host_address_to_string (writebuf), | |
0b1553bc | 1162 | core_addr_to_string_nz (offset), |
9b409511 YQ |
1163 | pulongest (len), retval, |
1164 | pulongest (*xfered_len)); | |
27394598 AC |
1165 | |
1166 | if (readbuf) | |
1167 | myaddr = readbuf; | |
1168 | if (writebuf) | |
1169 | myaddr = writebuf; | |
9b409511 | 1170 | if (retval == TARGET_XFER_OK && myaddr != NULL) |
27394598 AC |
1171 | { |
1172 | int i; | |
2bc416ba | 1173 | |
27394598 | 1174 | fputs_unfiltered (", bytes =", gdb_stdlog); |
9b409511 | 1175 | for (i = 0; i < *xfered_len; i++) |
27394598 | 1176 | { |
53b71562 | 1177 | if ((((intptr_t) &(myaddr[i])) & 0xf) == 0) |
27394598 AC |
1178 | { |
1179 | if (targetdebug < 2 && i > 0) | |
1180 | { | |
1181 | fprintf_unfiltered (gdb_stdlog, " ..."); | |
1182 | break; | |
1183 | } | |
1184 | fprintf_unfiltered (gdb_stdlog, "\n"); | |
1185 | } | |
2bc416ba | 1186 | |
27394598 AC |
1187 | fprintf_unfiltered (gdb_stdlog, " %02x", myaddr[i] & 0xff); |
1188 | } | |
1189 | } | |
2bc416ba | 1190 | |
27394598 AC |
1191 | fputc_unfiltered ('\n', gdb_stdlog); |
1192 | } | |
9b409511 YQ |
1193 | |
1194 | /* Check implementations of to_xfer_partial update *XFERED_LEN | |
1195 | properly. Do assertion after printing debug messages, so that we | |
1196 | can find more clues on assertion failure from debugging messages. */ | |
bc113b4e | 1197 | if (retval == TARGET_XFER_OK || retval == TARGET_XFER_UNAVAILABLE) |
9b409511 YQ |
1198 | gdb_assert (*xfered_len > 0); |
1199 | ||
27394598 AC |
1200 | return retval; |
1201 | } | |
1202 | ||
578d3588 PA |
1203 | /* Read LEN bytes of target memory at address MEMADDR, placing the |
1204 | results in GDB's memory at MYADDR. Returns either 0 for success or | |
d09f2c3f | 1205 | -1 if any error occurs. |
c906108c SS |
1206 | |
1207 | If an error occurs, no guarantee is made about the contents of the data at | |
1208 | MYADDR. In particular, the caller should not depend upon partial reads | |
1209 | filling the buffer with good data. There is no way for the caller to know | |
1210 | how much good data might have been transfered anyway. Callers that can | |
cf7a04e8 | 1211 | deal with partial reads should call target_read (which will retry until |
c378eb4e | 1212 | it makes no progress, and then return how much was transferred). */ |
c906108c SS |
1213 | |
1214 | int | |
1b162304 | 1215 | target_read_memory (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len) |
c906108c | 1216 | { |
8b88a78e | 1217 | if (target_read (current_top_target (), TARGET_OBJECT_MEMORY, NULL, |
cf7a04e8 DJ |
1218 | myaddr, memaddr, len) == len) |
1219 | return 0; | |
0779438d | 1220 | else |
d09f2c3f | 1221 | return -1; |
c906108c SS |
1222 | } |
1223 | ||
721ec300 GB |
1224 | /* See target/target.h. */ |
1225 | ||
1226 | int | |
1227 | target_read_uint32 (CORE_ADDR memaddr, uint32_t *result) | |
1228 | { | |
1229 | gdb_byte buf[4]; | |
1230 | int r; | |
1231 | ||
1232 | r = target_read_memory (memaddr, buf, sizeof buf); | |
1233 | if (r != 0) | |
1234 | return r; | |
1235 | *result = extract_unsigned_integer (buf, sizeof buf, | |
1236 | gdbarch_byte_order (target_gdbarch ())); | |
1237 | return 0; | |
1238 | } | |
1239 | ||
aee4bf85 PA |
1240 | /* Like target_read_memory, but specify explicitly that this is a read |
1241 | from the target's raw memory. That is, this read bypasses the | |
1242 | dcache, breakpoint shadowing, etc. */ | |
1243 | ||
1244 | int | |
1245 | target_read_raw_memory (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len) | |
1246 | { | |
8b88a78e | 1247 | if (target_read (current_top_target (), TARGET_OBJECT_RAW_MEMORY, NULL, |
aee4bf85 PA |
1248 | myaddr, memaddr, len) == len) |
1249 | return 0; | |
1250 | else | |
d09f2c3f | 1251 | return -1; |
aee4bf85 PA |
1252 | } |
1253 | ||
4e5d721f DE |
1254 | /* Like target_read_memory, but specify explicitly that this is a read from |
1255 | the target's stack. This may trigger different cache behavior. */ | |
1256 | ||
1257 | int | |
45aa4659 | 1258 | target_read_stack (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len) |
4e5d721f | 1259 | { |
8b88a78e | 1260 | if (target_read (current_top_target (), TARGET_OBJECT_STACK_MEMORY, NULL, |
4e5d721f DE |
1261 | myaddr, memaddr, len) == len) |
1262 | return 0; | |
1263 | else | |
d09f2c3f | 1264 | return -1; |
4e5d721f DE |
1265 | } |
1266 | ||
29453a14 YQ |
1267 | /* Like target_read_memory, but specify explicitly that this is a read from |
1268 | the target's code. This may trigger different cache behavior. */ | |
1269 | ||
1270 | int | |
1271 | target_read_code (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len) | |
1272 | { | |
8b88a78e | 1273 | if (target_read (current_top_target (), TARGET_OBJECT_CODE_MEMORY, NULL, |
29453a14 YQ |
1274 | myaddr, memaddr, len) == len) |
1275 | return 0; | |
1276 | else | |
d09f2c3f | 1277 | return -1; |
29453a14 YQ |
1278 | } |
1279 | ||
7f79c47e | 1280 | /* Write LEN bytes from MYADDR to target memory at address MEMADDR. |
d09f2c3f PA |
1281 | Returns either 0 for success or -1 if any error occurs. If an |
1282 | error occurs, no guarantee is made about how much data got written. | |
1283 | Callers that can deal with partial writes should call | |
1284 | target_write. */ | |
7f79c47e | 1285 | |
c906108c | 1286 | int |
45aa4659 | 1287 | target_write_memory (CORE_ADDR memaddr, const gdb_byte *myaddr, ssize_t len) |
c906108c | 1288 | { |
8b88a78e | 1289 | if (target_write (current_top_target (), TARGET_OBJECT_MEMORY, NULL, |
cf7a04e8 DJ |
1290 | myaddr, memaddr, len) == len) |
1291 | return 0; | |
0779438d | 1292 | else |
d09f2c3f | 1293 | return -1; |
c906108c | 1294 | } |
c5aa993b | 1295 | |
f0ba3972 | 1296 | /* Write LEN bytes from MYADDR to target raw memory at address |
d09f2c3f PA |
1297 | MEMADDR. Returns either 0 for success or -1 if any error occurs. |
1298 | If an error occurs, no guarantee is made about how much data got | |
1299 | written. Callers that can deal with partial writes should call | |
1300 | target_write. */ | |
f0ba3972 PA |
1301 | |
1302 | int | |
45aa4659 | 1303 | target_write_raw_memory (CORE_ADDR memaddr, const gdb_byte *myaddr, ssize_t len) |
f0ba3972 | 1304 | { |
8b88a78e | 1305 | if (target_write (current_top_target (), TARGET_OBJECT_RAW_MEMORY, NULL, |
f0ba3972 PA |
1306 | myaddr, memaddr, len) == len) |
1307 | return 0; | |
1308 | else | |
d09f2c3f | 1309 | return -1; |
f0ba3972 PA |
1310 | } |
1311 | ||
fd79ecee DJ |
1312 | /* Fetch the target's memory map. */ |
1313 | ||
a664f67e | 1314 | std::vector<mem_region> |
fd79ecee DJ |
1315 | target_memory_map (void) |
1316 | { | |
8b88a78e | 1317 | std::vector<mem_region> result = current_top_target ()->memory_map (); |
a664f67e SM |
1318 | if (result.empty ()) |
1319 | return result; | |
fd79ecee | 1320 | |
a664f67e | 1321 | std::sort (result.begin (), result.end ()); |
fd79ecee DJ |
1322 | |
1323 | /* Check that regions do not overlap. Simultaneously assign | |
1324 | a numbering for the "mem" commands to use to refer to | |
1325 | each region. */ | |
a664f67e SM |
1326 | mem_region *last_one = NULL; |
1327 | for (size_t ix = 0; ix < result.size (); ix++) | |
fd79ecee | 1328 | { |
a664f67e | 1329 | mem_region *this_one = &result[ix]; |
fd79ecee DJ |
1330 | this_one->number = ix; |
1331 | ||
a664f67e | 1332 | if (last_one != NULL && last_one->hi > this_one->lo) |
fd79ecee DJ |
1333 | { |
1334 | warning (_("Overlapping regions in memory map: ignoring")); | |
a664f67e | 1335 | return std::vector<mem_region> (); |
fd79ecee | 1336 | } |
a664f67e | 1337 | |
fd79ecee DJ |
1338 | last_one = this_one; |
1339 | } | |
1340 | ||
1341 | return result; | |
1342 | } | |
1343 | ||
a76d924d DJ |
1344 | void |
1345 | target_flash_erase (ULONGEST address, LONGEST length) | |
1346 | { | |
8b88a78e | 1347 | current_top_target ()->flash_erase (address, length); |
a76d924d DJ |
1348 | } |
1349 | ||
1350 | void | |
1351 | target_flash_done (void) | |
1352 | { | |
8b88a78e | 1353 | current_top_target ()->flash_done (); |
a76d924d DJ |
1354 | } |
1355 | ||
920d2a44 AC |
1356 | static void |
1357 | show_trust_readonly (struct ui_file *file, int from_tty, | |
1358 | struct cmd_list_element *c, const char *value) | |
1359 | { | |
3e43a32a MS |
1360 | fprintf_filtered (file, |
1361 | _("Mode for reading from readonly sections is %s.\n"), | |
920d2a44 AC |
1362 | value); |
1363 | } | |
3a11626d | 1364 | |
7f79c47e | 1365 | /* Target vector read/write partial wrapper functions. */ |
0088c768 | 1366 | |
9b409511 | 1367 | static enum target_xfer_status |
1e3ff5ad AC |
1368 | target_read_partial (struct target_ops *ops, |
1369 | enum target_object object, | |
1b0ba102 | 1370 | const char *annex, gdb_byte *buf, |
9b409511 YQ |
1371 | ULONGEST offset, ULONGEST len, |
1372 | ULONGEST *xfered_len) | |
1e3ff5ad | 1373 | { |
9b409511 YQ |
1374 | return target_xfer_partial (ops, object, annex, buf, NULL, offset, len, |
1375 | xfered_len); | |
1e3ff5ad AC |
1376 | } |
1377 | ||
8a55ffb0 | 1378 | static enum target_xfer_status |
1e3ff5ad AC |
1379 | target_write_partial (struct target_ops *ops, |
1380 | enum target_object object, | |
1b0ba102 | 1381 | const char *annex, const gdb_byte *buf, |
9b409511 | 1382 | ULONGEST offset, LONGEST len, ULONGEST *xfered_len) |
1e3ff5ad | 1383 | { |
9b409511 YQ |
1384 | return target_xfer_partial (ops, object, annex, NULL, buf, offset, len, |
1385 | xfered_len); | |
1e3ff5ad AC |
1386 | } |
1387 | ||
1388 | /* Wrappers to perform the full transfer. */ | |
7f79c47e DE |
1389 | |
1390 | /* For docs on target_read see target.h. */ | |
1391 | ||
1e3ff5ad AC |
1392 | LONGEST |
1393 | target_read (struct target_ops *ops, | |
1394 | enum target_object object, | |
1b0ba102 | 1395 | const char *annex, gdb_byte *buf, |
1e3ff5ad AC |
1396 | ULONGEST offset, LONGEST len) |
1397 | { | |
279a6fed | 1398 | LONGEST xfered_total = 0; |
d309493c SM |
1399 | int unit_size = 1; |
1400 | ||
1401 | /* If we are reading from a memory object, find the length of an addressable | |
1402 | unit for that architecture. */ | |
1403 | if (object == TARGET_OBJECT_MEMORY | |
1404 | || object == TARGET_OBJECT_STACK_MEMORY | |
1405 | || object == TARGET_OBJECT_CODE_MEMORY | |
1406 | || object == TARGET_OBJECT_RAW_MEMORY) | |
1407 | unit_size = gdbarch_addressable_memory_unit_size (target_gdbarch ()); | |
5d502164 | 1408 | |
279a6fed | 1409 | while (xfered_total < len) |
1e3ff5ad | 1410 | { |
279a6fed | 1411 | ULONGEST xfered_partial; |
9b409511 YQ |
1412 | enum target_xfer_status status; |
1413 | ||
1414 | status = target_read_partial (ops, object, annex, | |
d309493c | 1415 | buf + xfered_total * unit_size, |
279a6fed SM |
1416 | offset + xfered_total, len - xfered_total, |
1417 | &xfered_partial); | |
5d502164 | 1418 | |
1e3ff5ad | 1419 | /* Call an observer, notifying them of the xfer progress? */ |
9b409511 | 1420 | if (status == TARGET_XFER_EOF) |
279a6fed | 1421 | return xfered_total; |
9b409511 YQ |
1422 | else if (status == TARGET_XFER_OK) |
1423 | { | |
279a6fed | 1424 | xfered_total += xfered_partial; |
9b409511 YQ |
1425 | QUIT; |
1426 | } | |
1427 | else | |
279a6fed | 1428 | return TARGET_XFER_E_IO; |
9b409511 | 1429 | |
1e3ff5ad AC |
1430 | } |
1431 | return len; | |
1432 | } | |
1433 | ||
f1a507a1 JB |
1434 | /* Assuming that the entire [begin, end) range of memory cannot be |
1435 | read, try to read whatever subrange is possible to read. | |
1436 | ||
1437 | The function returns, in RESULT, either zero or one memory block. | |
1438 | If there's a readable subrange at the beginning, it is completely | |
1439 | read and returned. Any further readable subrange will not be read. | |
1440 | Otherwise, if there's a readable subrange at the end, it will be | |
1441 | completely read and returned. Any readable subranges before it | |
1442 | (obviously, not starting at the beginning), will be ignored. In | |
1443 | other cases -- either no readable subrange, or readable subrange(s) | |
1444 | that is neither at the beginning, or end, nothing is returned. | |
1445 | ||
1446 | The purpose of this function is to handle a read across a boundary | |
1447 | of accessible memory in a case when memory map is not available. | |
1448 | The above restrictions are fine for this case, but will give | |
1449 | incorrect results if the memory is 'patchy'. However, supporting | |
1450 | 'patchy' memory would require trying to read every single byte, | |
1451 | and it seems unacceptable solution. Explicit memory map is | |
1452 | recommended for this case -- and target_read_memory_robust will | |
1453 | take care of reading multiple ranges then. */ | |
8dedea02 VP |
1454 | |
1455 | static void | |
3e43a32a | 1456 | read_whatever_is_readable (struct target_ops *ops, |
279a6fed | 1457 | const ULONGEST begin, const ULONGEST end, |
d309493c | 1458 | int unit_size, |
386c8614 | 1459 | std::vector<memory_read_result> *result) |
d5086790 | 1460 | { |
8dedea02 VP |
1461 | ULONGEST current_begin = begin; |
1462 | ULONGEST current_end = end; | |
1463 | int forward; | |
9b409511 | 1464 | ULONGEST xfered_len; |
8dedea02 VP |
1465 | |
1466 | /* If we previously failed to read 1 byte, nothing can be done here. */ | |
1467 | if (end - begin <= 1) | |
386c8614 TT |
1468 | return; |
1469 | ||
1470 | gdb::unique_xmalloc_ptr<gdb_byte> buf ((gdb_byte *) xmalloc (end - begin)); | |
8dedea02 VP |
1471 | |
1472 | /* Check that either first or the last byte is readable, and give up | |
c378eb4e | 1473 | if not. This heuristic is meant to permit reading accessible memory |
8dedea02 VP |
1474 | at the boundary of accessible region. */ |
1475 | if (target_read_partial (ops, TARGET_OBJECT_MEMORY, NULL, | |
386c8614 | 1476 | buf.get (), begin, 1, &xfered_len) == TARGET_XFER_OK) |
8dedea02 VP |
1477 | { |
1478 | forward = 1; | |
1479 | ++current_begin; | |
1480 | } | |
1481 | else if (target_read_partial (ops, TARGET_OBJECT_MEMORY, NULL, | |
386c8614 | 1482 | buf.get () + (end - begin) - 1, end - 1, 1, |
9b409511 | 1483 | &xfered_len) == TARGET_XFER_OK) |
8dedea02 VP |
1484 | { |
1485 | forward = 0; | |
1486 | --current_end; | |
1487 | } | |
1488 | else | |
386c8614 | 1489 | return; |
8dedea02 VP |
1490 | |
1491 | /* Loop invariant is that the [current_begin, current_end) was previously | |
1492 | found to be not readable as a whole. | |
1493 | ||
1494 | Note loop condition -- if the range has 1 byte, we can't divide the range | |
1495 | so there's no point trying further. */ | |
1496 | while (current_end - current_begin > 1) | |
1497 | { | |
1498 | ULONGEST first_half_begin, first_half_end; | |
1499 | ULONGEST second_half_begin, second_half_end; | |
1500 | LONGEST xfer; | |
279a6fed | 1501 | ULONGEST middle = current_begin + (current_end - current_begin) / 2; |
f1a507a1 | 1502 | |
8dedea02 VP |
1503 | if (forward) |
1504 | { | |
1505 | first_half_begin = current_begin; | |
1506 | first_half_end = middle; | |
1507 | second_half_begin = middle; | |
1508 | second_half_end = current_end; | |
1509 | } | |
1510 | else | |
1511 | { | |
1512 | first_half_begin = middle; | |
1513 | first_half_end = current_end; | |
1514 | second_half_begin = current_begin; | |
1515 | second_half_end = middle; | |
1516 | } | |
1517 | ||
1518 | xfer = target_read (ops, TARGET_OBJECT_MEMORY, NULL, | |
386c8614 | 1519 | buf.get () + (first_half_begin - begin) * unit_size, |
8dedea02 VP |
1520 | first_half_begin, |
1521 | first_half_end - first_half_begin); | |
1522 | ||
1523 | if (xfer == first_half_end - first_half_begin) | |
1524 | { | |
c378eb4e | 1525 | /* This half reads up fine. So, the error must be in the |
3e43a32a | 1526 | other half. */ |
8dedea02 VP |
1527 | current_begin = second_half_begin; |
1528 | current_end = second_half_end; | |
1529 | } | |
1530 | else | |
1531 | { | |
c378eb4e | 1532 | /* This half is not readable. Because we've tried one byte, we |
279a6fed | 1533 | know some part of this half if actually readable. Go to the next |
8dedea02 VP |
1534 | iteration to divide again and try to read. |
1535 | ||
1536 | We don't handle the other half, because this function only tries | |
1537 | to read a single readable subrange. */ | |
1538 | current_begin = first_half_begin; | |
1539 | current_end = first_half_end; | |
1540 | } | |
1541 | } | |
1542 | ||
1543 | if (forward) | |
1544 | { | |
1545 | /* The [begin, current_begin) range has been read. */ | |
386c8614 | 1546 | result->emplace_back (begin, current_end, std::move (buf)); |
8dedea02 VP |
1547 | } |
1548 | else | |
1549 | { | |
1550 | /* The [current_end, end) range has been read. */ | |
279a6fed | 1551 | LONGEST region_len = end - current_end; |
f1a507a1 | 1552 | |
386c8614 TT |
1553 | gdb::unique_xmalloc_ptr<gdb_byte> data |
1554 | ((gdb_byte *) xmalloc (region_len * unit_size)); | |
1555 | memcpy (data.get (), buf.get () + (current_end - begin) * unit_size, | |
d309493c | 1556 | region_len * unit_size); |
386c8614 | 1557 | result->emplace_back (current_end, end, std::move (data)); |
8dedea02 | 1558 | } |
8dedea02 VP |
1559 | } |
1560 | ||
386c8614 | 1561 | std::vector<memory_read_result> |
279a6fed SM |
1562 | read_memory_robust (struct target_ops *ops, |
1563 | const ULONGEST offset, const LONGEST len) | |
8dedea02 | 1564 | { |
386c8614 | 1565 | std::vector<memory_read_result> result; |
d309493c | 1566 | int unit_size = gdbarch_addressable_memory_unit_size (target_gdbarch ()); |
8dedea02 | 1567 | |
279a6fed SM |
1568 | LONGEST xfered_total = 0; |
1569 | while (xfered_total < len) | |
d5086790 | 1570 | { |
279a6fed SM |
1571 | struct mem_region *region = lookup_mem_region (offset + xfered_total); |
1572 | LONGEST region_len; | |
5d502164 | 1573 | |
8dedea02 VP |
1574 | /* If there is no explicit region, a fake one should be created. */ |
1575 | gdb_assert (region); | |
1576 | ||
1577 | if (region->hi == 0) | |
279a6fed | 1578 | region_len = len - xfered_total; |
8dedea02 | 1579 | else |
279a6fed | 1580 | region_len = region->hi - offset; |
8dedea02 VP |
1581 | |
1582 | if (region->attrib.mode == MEM_NONE || region->attrib.mode == MEM_WO) | |
d5086790 | 1583 | { |
c378eb4e | 1584 | /* Cannot read this region. Note that we can end up here only |
8dedea02 VP |
1585 | if the region is explicitly marked inaccessible, or |
1586 | 'inaccessible-by-default' is in effect. */ | |
279a6fed | 1587 | xfered_total += region_len; |
8dedea02 VP |
1588 | } |
1589 | else | |
1590 | { | |
325fac50 | 1591 | LONGEST to_read = std::min (len - xfered_total, region_len); |
386c8614 TT |
1592 | gdb::unique_xmalloc_ptr<gdb_byte> buffer |
1593 | ((gdb_byte *) xmalloc (to_read * unit_size)); | |
8dedea02 | 1594 | |
279a6fed | 1595 | LONGEST xfered_partial = |
386c8614 | 1596 | target_read (ops, TARGET_OBJECT_MEMORY, NULL, buffer.get (), |
279a6fed | 1597 | offset + xfered_total, to_read); |
8dedea02 | 1598 | /* Call an observer, notifying them of the xfer progress? */ |
279a6fed | 1599 | if (xfered_partial <= 0) |
d5086790 | 1600 | { |
c378eb4e | 1601 | /* Got an error reading full chunk. See if maybe we can read |
8dedea02 | 1602 | some subrange. */ |
e084c964 DB |
1603 | read_whatever_is_readable (ops, offset + xfered_total, |
1604 | offset + xfered_total + to_read, | |
1605 | unit_size, &result); | |
279a6fed | 1606 | xfered_total += to_read; |
d5086790 | 1607 | } |
8dedea02 VP |
1608 | else |
1609 | { | |
386c8614 TT |
1610 | result.emplace_back (offset + xfered_total, |
1611 | offset + xfered_total + xfered_partial, | |
1612 | std::move (buffer)); | |
279a6fed | 1613 | xfered_total += xfered_partial; |
8dedea02 VP |
1614 | } |
1615 | QUIT; | |
d5086790 | 1616 | } |
d5086790 | 1617 | } |
9d78f827 | 1618 | |
8dedea02 | 1619 | return result; |
d5086790 VP |
1620 | } |
1621 | ||
8dedea02 | 1622 | |
cf7a04e8 DJ |
1623 | /* An alternative to target_write with progress callbacks. */ |
1624 | ||
1e3ff5ad | 1625 | LONGEST |
cf7a04e8 DJ |
1626 | target_write_with_progress (struct target_ops *ops, |
1627 | enum target_object object, | |
1628 | const char *annex, const gdb_byte *buf, | |
1629 | ULONGEST offset, LONGEST len, | |
1630 | void (*progress) (ULONGEST, void *), void *baton) | |
1e3ff5ad | 1631 | { |
279a6fed | 1632 | LONGEST xfered_total = 0; |
d309493c SM |
1633 | int unit_size = 1; |
1634 | ||
1635 | /* If we are writing to a memory object, find the length of an addressable | |
1636 | unit for that architecture. */ | |
1637 | if (object == TARGET_OBJECT_MEMORY | |
1638 | || object == TARGET_OBJECT_STACK_MEMORY | |
1639 | || object == TARGET_OBJECT_CODE_MEMORY | |
1640 | || object == TARGET_OBJECT_RAW_MEMORY) | |
1641 | unit_size = gdbarch_addressable_memory_unit_size (target_gdbarch ()); | |
a76d924d DJ |
1642 | |
1643 | /* Give the progress callback a chance to set up. */ | |
1644 | if (progress) | |
1645 | (*progress) (0, baton); | |
1646 | ||
279a6fed | 1647 | while (xfered_total < len) |
1e3ff5ad | 1648 | { |
279a6fed | 1649 | ULONGEST xfered_partial; |
9b409511 YQ |
1650 | enum target_xfer_status status; |
1651 | ||
1652 | status = target_write_partial (ops, object, annex, | |
d309493c | 1653 | buf + xfered_total * unit_size, |
279a6fed SM |
1654 | offset + xfered_total, len - xfered_total, |
1655 | &xfered_partial); | |
cf7a04e8 | 1656 | |
5c328c05 | 1657 | if (status != TARGET_XFER_OK) |
279a6fed | 1658 | return status == TARGET_XFER_EOF ? xfered_total : TARGET_XFER_E_IO; |
cf7a04e8 DJ |
1659 | |
1660 | if (progress) | |
279a6fed | 1661 | (*progress) (xfered_partial, baton); |
cf7a04e8 | 1662 | |
279a6fed | 1663 | xfered_total += xfered_partial; |
1e3ff5ad AC |
1664 | QUIT; |
1665 | } | |
1666 | return len; | |
1667 | } | |
1668 | ||
7f79c47e DE |
1669 | /* For docs on target_write see target.h. */ |
1670 | ||
cf7a04e8 DJ |
1671 | LONGEST |
1672 | target_write (struct target_ops *ops, | |
1673 | enum target_object object, | |
1674 | const char *annex, const gdb_byte *buf, | |
1675 | ULONGEST offset, LONGEST len) | |
1676 | { | |
1677 | return target_write_with_progress (ops, object, annex, buf, offset, len, | |
1678 | NULL, NULL); | |
1679 | } | |
1680 | ||
9018be22 SM |
1681 | /* Help for target_read_alloc and target_read_stralloc. See their comments |
1682 | for details. */ | |
13547ab6 | 1683 | |
9018be22 SM |
1684 | template <typename T> |
1685 | gdb::optional<gdb::def_vector<T>> | |
159f81f3 | 1686 | target_read_alloc_1 (struct target_ops *ops, enum target_object object, |
9018be22 | 1687 | const char *annex) |
13547ab6 | 1688 | { |
9018be22 SM |
1689 | gdb::def_vector<T> buf; |
1690 | size_t buf_pos = 0; | |
1691 | const int chunk = 4096; | |
13547ab6 DJ |
1692 | |
1693 | /* This function does not have a length parameter; it reads the | |
1694 | entire OBJECT). Also, it doesn't support objects fetched partly | |
1695 | from one target and partly from another (in a different stratum, | |
1696 | e.g. a core file and an executable). Both reasons make it | |
1697 | unsuitable for reading memory. */ | |
1698 | gdb_assert (object != TARGET_OBJECT_MEMORY); | |
1699 | ||
1700 | /* Start by reading up to 4K at a time. The target will throttle | |
1701 | this number down if necessary. */ | |
13547ab6 DJ |
1702 | while (1) |
1703 | { | |
9b409511 YQ |
1704 | ULONGEST xfered_len; |
1705 | enum target_xfer_status status; | |
1706 | ||
9018be22 SM |
1707 | buf.resize (buf_pos + chunk); |
1708 | ||
1709 | status = target_read_partial (ops, object, annex, | |
1710 | (gdb_byte *) &buf[buf_pos], | |
1711 | buf_pos, chunk, | |
9b409511 YQ |
1712 | &xfered_len); |
1713 | ||
1714 | if (status == TARGET_XFER_EOF) | |
13547ab6 DJ |
1715 | { |
1716 | /* Read all there was. */ | |
9018be22 SM |
1717 | buf.resize (buf_pos); |
1718 | return buf; | |
13547ab6 | 1719 | } |
9b409511 YQ |
1720 | else if (status != TARGET_XFER_OK) |
1721 | { | |
1722 | /* An error occurred. */ | |
9018be22 | 1723 | return {}; |
9b409511 | 1724 | } |
13547ab6 | 1725 | |
9b409511 | 1726 | buf_pos += xfered_len; |
13547ab6 | 1727 | |
13547ab6 DJ |
1728 | QUIT; |
1729 | } | |
1730 | } | |
1731 | ||
9018be22 | 1732 | /* See target.h */ |
159f81f3 | 1733 | |
9018be22 | 1734 | gdb::optional<gdb::byte_vector> |
159f81f3 | 1735 | target_read_alloc (struct target_ops *ops, enum target_object object, |
9018be22 | 1736 | const char *annex) |
159f81f3 | 1737 | { |
9018be22 | 1738 | return target_read_alloc_1<gdb_byte> (ops, object, annex); |
159f81f3 DJ |
1739 | } |
1740 | ||
b7b030ad | 1741 | /* See target.h. */ |
159f81f3 | 1742 | |
9018be22 | 1743 | gdb::optional<gdb::char_vector> |
159f81f3 DJ |
1744 | target_read_stralloc (struct target_ops *ops, enum target_object object, |
1745 | const char *annex) | |
1746 | { | |
9018be22 SM |
1747 | gdb::optional<gdb::char_vector> buf |
1748 | = target_read_alloc_1<char> (ops, object, annex); | |
159f81f3 | 1749 | |
9018be22 SM |
1750 | if (!buf) |
1751 | return {}; | |
159f81f3 | 1752 | |
d00a27c5 | 1753 | if (buf->empty () || buf->back () != '\0') |
9018be22 | 1754 | buf->push_back ('\0'); |
7313baad UW |
1755 | |
1756 | /* Check for embedded NUL bytes; but allow trailing NULs. */ | |
9018be22 SM |
1757 | for (auto it = std::find (buf->begin (), buf->end (), '\0'); |
1758 | it != buf->end (); it++) | |
1759 | if (*it != '\0') | |
7313baad UW |
1760 | { |
1761 | warning (_("target object %d, annex %s, " | |
1762 | "contained unexpected null characters"), | |
1763 | (int) object, annex ? annex : "(none)"); | |
1764 | break; | |
1765 | } | |
159f81f3 | 1766 | |
9018be22 | 1767 | return buf; |
159f81f3 DJ |
1768 | } |
1769 | ||
b6591e8b AC |
1770 | /* Memory transfer methods. */ |
1771 | ||
1772 | void | |
1b0ba102 | 1773 | get_target_memory (struct target_ops *ops, CORE_ADDR addr, gdb_byte *buf, |
b6591e8b AC |
1774 | LONGEST len) |
1775 | { | |
07b82ea5 PA |
1776 | /* This method is used to read from an alternate, non-current |
1777 | target. This read must bypass the overlay support (as symbols | |
1778 | don't match this target), and GDB's internal cache (wrong cache | |
1779 | for this target). */ | |
1780 | if (target_read (ops, TARGET_OBJECT_RAW_MEMORY, NULL, buf, addr, len) | |
b6591e8b | 1781 | != len) |
578d3588 | 1782 | memory_error (TARGET_XFER_E_IO, addr); |
b6591e8b AC |
1783 | } |
1784 | ||
1785 | ULONGEST | |
5d502164 MS |
1786 | get_target_memory_unsigned (struct target_ops *ops, CORE_ADDR addr, |
1787 | int len, enum bfd_endian byte_order) | |
b6591e8b | 1788 | { |
f6519ebc | 1789 | gdb_byte buf[sizeof (ULONGEST)]; |
b6591e8b AC |
1790 | |
1791 | gdb_assert (len <= sizeof (buf)); | |
1792 | get_target_memory (ops, addr, buf, len); | |
e17a4113 | 1793 | return extract_unsigned_integer (buf, len, byte_order); |
b6591e8b AC |
1794 | } |
1795 | ||
3db08215 MM |
1796 | /* See target.h. */ |
1797 | ||
d914c394 SS |
1798 | int |
1799 | target_insert_breakpoint (struct gdbarch *gdbarch, | |
1800 | struct bp_target_info *bp_tgt) | |
1801 | { | |
1802 | if (!may_insert_breakpoints) | |
1803 | { | |
1804 | warning (_("May not insert breakpoints")); | |
1805 | return 1; | |
1806 | } | |
1807 | ||
8b88a78e | 1808 | return current_top_target ()->insert_breakpoint (gdbarch, bp_tgt); |
d914c394 SS |
1809 | } |
1810 | ||
3db08215 MM |
1811 | /* See target.h. */ |
1812 | ||
d914c394 | 1813 | int |
6b84065d | 1814 | target_remove_breakpoint (struct gdbarch *gdbarch, |
73971819 PA |
1815 | struct bp_target_info *bp_tgt, |
1816 | enum remove_bp_reason reason) | |
d914c394 SS |
1817 | { |
1818 | /* This is kind of a weird case to handle, but the permission might | |
1819 | have been changed after breakpoints were inserted - in which case | |
1820 | we should just take the user literally and assume that any | |
1821 | breakpoints should be left in place. */ | |
1822 | if (!may_insert_breakpoints) | |
1823 | { | |
1824 | warning (_("May not remove breakpoints")); | |
1825 | return 1; | |
1826 | } | |
1827 | ||
8b88a78e | 1828 | return current_top_target ()->remove_breakpoint (gdbarch, bp_tgt, reason); |
d914c394 SS |
1829 | } |
1830 | ||
c906108c | 1831 | static void |
1d12d88f | 1832 | info_target_command (const char *args, int from_tty) |
c906108c | 1833 | { |
c906108c | 1834 | int has_all_mem = 0; |
c5aa993b | 1835 | |
c906108c | 1836 | if (symfile_objfile != NULL) |
4262abfb JK |
1837 | printf_unfiltered (_("Symbols from \"%s\".\n"), |
1838 | objfile_name (symfile_objfile)); | |
c906108c | 1839 | |
b6a8c27b | 1840 | for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
c906108c | 1841 | { |
f6ac5f3d | 1842 | if (!t->has_memory ()) |
c906108c SS |
1843 | continue; |
1844 | ||
66b4deae | 1845 | if ((int) (t->stratum ()) <= (int) dummy_stratum) |
c906108c SS |
1846 | continue; |
1847 | if (has_all_mem) | |
3e43a32a MS |
1848 | printf_unfiltered (_("\tWhile running this, " |
1849 | "GDB does not access memory from...\n")); | |
f6ac5f3d PA |
1850 | printf_unfiltered ("%s:\n", t->longname ()); |
1851 | t->files_info (); | |
1852 | has_all_mem = t->has_all_memory (); | |
c906108c SS |
1853 | } |
1854 | } | |
1855 | ||
fd79ecee DJ |
1856 | /* This function is called before any new inferior is created, e.g. |
1857 | by running a program, attaching, or connecting to a target. | |
1858 | It cleans up any state from previous invocations which might | |
1859 | change between runs. This is a subset of what target_preopen | |
1860 | resets (things which might change between targets). */ | |
1861 | ||
1862 | void | |
1863 | target_pre_inferior (int from_tty) | |
1864 | { | |
c378eb4e | 1865 | /* Clear out solib state. Otherwise the solib state of the previous |
b9db4ced | 1866 | inferior might have survived and is entirely wrong for the new |
c378eb4e | 1867 | target. This has been observed on GNU/Linux using glibc 2.3. How |
b9db4ced UW |
1868 | to reproduce: |
1869 | ||
1870 | bash$ ./foo& | |
1871 | [1] 4711 | |
1872 | bash$ ./foo& | |
1873 | [1] 4712 | |
1874 | bash$ gdb ./foo | |
1875 | [...] | |
1876 | (gdb) attach 4711 | |
1877 | (gdb) detach | |
1878 | (gdb) attach 4712 | |
1879 | Cannot access memory at address 0xdeadbeef | |
1880 | */ | |
b9db4ced | 1881 | |
50c71eaf PA |
1882 | /* In some OSs, the shared library list is the same/global/shared |
1883 | across inferiors. If code is shared between processes, so are | |
1884 | memory regions and features. */ | |
f5656ead | 1885 | if (!gdbarch_has_global_solist (target_gdbarch ())) |
50c71eaf PA |
1886 | { |
1887 | no_shared_libraries (NULL, from_tty); | |
1888 | ||
1889 | invalidate_target_mem_regions (); | |
424163ea | 1890 | |
50c71eaf PA |
1891 | target_clear_description (); |
1892 | } | |
8ffcbaaf | 1893 | |
e9756d52 PP |
1894 | /* attach_flag may be set if the previous process associated with |
1895 | the inferior was attached to. */ | |
1896 | current_inferior ()->attach_flag = 0; | |
1897 | ||
5d5658a1 PA |
1898 | current_inferior ()->highest_thread_num = 0; |
1899 | ||
8ffcbaaf | 1900 | agent_capability_invalidate (); |
fd79ecee DJ |
1901 | } |
1902 | ||
c906108c SS |
1903 | /* This is to be called by the open routine before it does |
1904 | anything. */ | |
1905 | ||
1906 | void | |
fba45db2 | 1907 | target_preopen (int from_tty) |
c906108c | 1908 | { |
c5aa993b | 1909 | dont_repeat (); |
c906108c | 1910 | |
5b6d1e4f | 1911 | if (current_inferior ()->pid != 0) |
c5aa993b | 1912 | { |
adf40b2e | 1913 | if (!from_tty |
55f6301a | 1914 | || !target_has_execution () |
b8fa0bfa | 1915 | || query (_("A program is being debugged already. Kill it? "))) |
5b6d1e4f PA |
1916 | { |
1917 | /* Core inferiors actually should be detached, not | |
1918 | killed. */ | |
55f6301a | 1919 | if (target_has_execution ()) |
5b6d1e4f PA |
1920 | target_kill (); |
1921 | else | |
1922 | target_detach (current_inferior (), 0); | |
1923 | } | |
c906108c | 1924 | else |
8a3fe4f8 | 1925 | error (_("Program not killed.")); |
c906108c SS |
1926 | } |
1927 | ||
1928 | /* Calling target_kill may remove the target from the stack. But if | |
1929 | it doesn't (which seems like a win for UDI), remove it now. */ | |
87ab71f0 PA |
1930 | /* Leave the exec target, though. The user may be switching from a |
1931 | live process to a core of the same program. */ | |
460014f5 | 1932 | pop_all_targets_above (file_stratum); |
fd79ecee DJ |
1933 | |
1934 | target_pre_inferior (from_tty); | |
c906108c SS |
1935 | } |
1936 | ||
6bd6f3b6 | 1937 | /* See target.h. */ |
c906108c SS |
1938 | |
1939 | void | |
6e1e1966 | 1940 | target_detach (inferior *inf, int from_tty) |
c906108c | 1941 | { |
5783e150 PW |
1942 | /* After we have detached, we will clear the register cache for this inferior |
1943 | by calling registers_changed_ptid. We must save the pid_ptid before | |
1944 | detaching, as the target detach method will clear inf->pid. */ | |
1945 | ptid_t save_pid_ptid = ptid_t (inf->pid); | |
1946 | ||
6e1e1966 SM |
1947 | /* As long as some to_detach implementations rely on the current_inferior |
1948 | (either directly, or indirectly, like through target_gdbarch or by | |
1949 | reading memory), INF needs to be the current inferior. When that | |
1950 | requirement will become no longer true, then we can remove this | |
1951 | assertion. */ | |
1952 | gdb_assert (inf == current_inferior ()); | |
1953 | ||
f5656ead | 1954 | if (gdbarch_has_global_breakpoints (target_gdbarch ())) |
50c71eaf PA |
1955 | /* Don't remove global breakpoints here. They're removed on |
1956 | disconnection from the target. */ | |
1957 | ; | |
1958 | else | |
1959 | /* If we're in breakpoints-always-inserted mode, have to remove | |
00431a78 PA |
1960 | breakpoints before detaching. */ |
1961 | remove_breakpoints_inf (current_inferior ()); | |
74960c60 | 1962 | |
24291992 PA |
1963 | prepare_for_detach (); |
1964 | ||
5b6d1e4f PA |
1965 | /* Hold a strong reference because detaching may unpush the |
1966 | target. */ | |
1967 | auto proc_target_ref = target_ops_ref::new_reference (inf->process_target ()); | |
1968 | ||
8b88a78e | 1969 | current_top_target ()->detach (inf, from_tty); |
799efbe8 | 1970 | |
5b6d1e4f PA |
1971 | process_stratum_target *proc_target |
1972 | = as_process_stratum_target (proc_target_ref.get ()); | |
1973 | ||
1974 | registers_changed_ptid (proc_target, save_pid_ptid); | |
799efbe8 PW |
1975 | |
1976 | /* We have to ensure we have no frame cache left. Normally, | |
5783e150 PW |
1977 | registers_changed_ptid (save_pid_ptid) calls reinit_frame_cache when |
1978 | inferior_ptid matches save_pid_ptid, but in our case, it does not | |
799efbe8 PW |
1979 | call it, as inferior_ptid has been reset. */ |
1980 | reinit_frame_cache (); | |
c906108c SS |
1981 | } |
1982 | ||
6ad8ae5c | 1983 | void |
fee354ee | 1984 | target_disconnect (const char *args, int from_tty) |
6ad8ae5c | 1985 | { |
50c71eaf PA |
1986 | /* If we're in breakpoints-always-inserted mode or if breakpoints |
1987 | are global across processes, we have to remove them before | |
1988 | disconnecting. */ | |
74960c60 VP |
1989 | remove_breakpoints (); |
1990 | ||
8b88a78e | 1991 | current_top_target ()->disconnect (args, from_tty); |
6ad8ae5c DJ |
1992 | } |
1993 | ||
f2b9e3df SDJ |
1994 | /* See target/target.h. */ |
1995 | ||
117de6a9 | 1996 | ptid_t |
b60cea74 TT |
1997 | target_wait (ptid_t ptid, struct target_waitstatus *status, |
1998 | target_wait_flags options) | |
117de6a9 | 1999 | { |
8b88a78e | 2000 | return current_top_target ()->wait (ptid, status, options); |
117de6a9 PA |
2001 | } |
2002 | ||
0b333c5e PA |
2003 | /* See target.h. */ |
2004 | ||
2005 | ptid_t | |
2006 | default_target_wait (struct target_ops *ops, | |
2007 | ptid_t ptid, struct target_waitstatus *status, | |
b60cea74 | 2008 | target_wait_flags options) |
0b333c5e PA |
2009 | { |
2010 | status->kind = TARGET_WAITKIND_IGNORE; | |
2011 | return minus_one_ptid; | |
2012 | } | |
2013 | ||
a068643d | 2014 | std::string |
117de6a9 PA |
2015 | target_pid_to_str (ptid_t ptid) |
2016 | { | |
8b88a78e | 2017 | return current_top_target ()->pid_to_str (ptid); |
117de6a9 PA |
2018 | } |
2019 | ||
73ede765 | 2020 | const char * |
4694da01 TT |
2021 | target_thread_name (struct thread_info *info) |
2022 | { | |
5b6d1e4f PA |
2023 | gdb_assert (info->inf == current_inferior ()); |
2024 | ||
8b88a78e | 2025 | return current_top_target ()->thread_name (info); |
4694da01 TT |
2026 | } |
2027 | ||
e04ee09e KB |
2028 | struct thread_info * |
2029 | target_thread_handle_to_thread_info (const gdb_byte *thread_handle, | |
2030 | int handle_len, | |
2031 | struct inferior *inf) | |
2032 | { | |
8b88a78e | 2033 | return current_top_target ()->thread_handle_to_thread_info (thread_handle, |
f6ac5f3d | 2034 | handle_len, inf); |
e04ee09e KB |
2035 | } |
2036 | ||
3d6c6204 KB |
2037 | /* See target.h. */ |
2038 | ||
2039 | gdb::byte_vector | |
2040 | target_thread_info_to_thread_handle (struct thread_info *tip) | |
2041 | { | |
2042 | return current_top_target ()->thread_info_to_thread_handle (tip); | |
2043 | } | |
2044 | ||
e1ac3328 | 2045 | void |
2ea28649 | 2046 | target_resume (ptid_t ptid, int step, enum gdb_signal signal) |
e1ac3328 | 2047 | { |
5b6d1e4f PA |
2048 | process_stratum_target *curr_target = current_inferior ()->process_target (); |
2049 | ||
4e5d721f | 2050 | target_dcache_invalidate (); |
28439f5e | 2051 | |
8b88a78e | 2052 | current_top_target ()->resume (ptid, step, signal); |
28439f5e | 2053 | |
5b6d1e4f | 2054 | registers_changed_ptid (curr_target, ptid); |
251bde03 | 2055 | /* We only set the internal executing state here. The user/frontend |
f2ffa92b PA |
2056 | running state is set at a higher level. This also clears the |
2057 | thread's stop_pc as side effect. */ | |
719546c4 | 2058 | set_executing (curr_target, ptid, true); |
5b6d1e4f | 2059 | clear_inline_frame_state (curr_target, ptid); |
e1ac3328 | 2060 | } |
2455069d | 2061 | |
85ad3aaf PA |
2062 | /* If true, target_commit_resume is a nop. */ |
2063 | static int defer_target_commit_resume; | |
2064 | ||
2065 | /* See target.h. */ | |
2066 | ||
2067 | void | |
2068 | target_commit_resume (void) | |
2069 | { | |
85ad3aaf PA |
2070 | if (defer_target_commit_resume) |
2071 | return; | |
2072 | ||
8b88a78e | 2073 | current_top_target ()->commit_resume (); |
85ad3aaf PA |
2074 | } |
2075 | ||
2076 | /* See target.h. */ | |
2077 | ||
a9bc57b9 TT |
2078 | scoped_restore_tmpl<int> |
2079 | make_scoped_defer_target_commit_resume () | |
85ad3aaf | 2080 | { |
a9bc57b9 | 2081 | return make_scoped_restore (&defer_target_commit_resume, 1); |
85ad3aaf PA |
2082 | } |
2083 | ||
2455069d | 2084 | void |
adc6a863 | 2085 | target_pass_signals (gdb::array_view<const unsigned char> pass_signals) |
2455069d | 2086 | { |
adc6a863 | 2087 | current_top_target ()->pass_signals (pass_signals); |
2455069d UW |
2088 | } |
2089 | ||
9b224c5e | 2090 | void |
adc6a863 | 2091 | target_program_signals (gdb::array_view<const unsigned char> program_signals) |
9b224c5e | 2092 | { |
adc6a863 | 2093 | current_top_target ()->program_signals (program_signals); |
9b224c5e PA |
2094 | } |
2095 | ||
5ab2fbf1 SM |
2096 | static bool |
2097 | default_follow_fork (struct target_ops *self, bool follow_child, | |
2098 | bool detach_fork) | |
098dba18 TT |
2099 | { |
2100 | /* Some target returned a fork event, but did not know how to follow it. */ | |
2101 | internal_error (__FILE__, __LINE__, | |
2102 | _("could not find a target to follow fork")); | |
2103 | } | |
2104 | ||
ee057212 DJ |
2105 | /* Look through the list of possible targets for a target that can |
2106 | follow forks. */ | |
2107 | ||
5ab2fbf1 SM |
2108 | bool |
2109 | target_follow_fork (bool follow_child, bool detach_fork) | |
ee057212 | 2110 | { |
8b88a78e | 2111 | return current_top_target ()->follow_fork (follow_child, detach_fork); |
ee057212 DJ |
2112 | } |
2113 | ||
94585166 DB |
2114 | /* Target wrapper for follow exec hook. */ |
2115 | ||
2116 | void | |
4ca51187 | 2117 | target_follow_exec (struct inferior *inf, const char *execd_pathname) |
94585166 | 2118 | { |
8b88a78e | 2119 | current_top_target ()->follow_exec (inf, execd_pathname); |
94585166 DB |
2120 | } |
2121 | ||
8d657035 TT |
2122 | static void |
2123 | default_mourn_inferior (struct target_ops *self) | |
2124 | { | |
2125 | internal_error (__FILE__, __LINE__, | |
2126 | _("could not find a target to follow mourn inferior")); | |
2127 | } | |
2128 | ||
136d6dae | 2129 | void |
bc1e6c81 | 2130 | target_mourn_inferior (ptid_t ptid) |
136d6dae | 2131 | { |
d7e15655 | 2132 | gdb_assert (ptid == inferior_ptid); |
8b88a78e | 2133 | current_top_target ()->mourn_inferior (); |
136d6dae | 2134 | |
8d657035 TT |
2135 | /* We no longer need to keep handles on any of the object files. |
2136 | Make sure to release them to avoid unnecessarily locking any | |
2137 | of them while we're not actually debugging. */ | |
2138 | bfd_cache_close_all (); | |
136d6dae VP |
2139 | } |
2140 | ||
424163ea DJ |
2141 | /* Look for a target which can describe architectural features, starting |
2142 | from TARGET. If we find one, return its description. */ | |
2143 | ||
2144 | const struct target_desc * | |
2145 | target_read_description (struct target_ops *target) | |
2146 | { | |
f6ac5f3d | 2147 | return target->read_description (); |
424163ea DJ |
2148 | } |
2149 | ||
58a5184e | 2150 | /* This implements a basic search of memory, reading target memory and |
08388c79 DE |
2151 | performing the search here (as opposed to performing the search in on the |
2152 | target side with, for example, gdbserver). */ | |
2153 | ||
2154 | int | |
2155 | simple_search_memory (struct target_ops *ops, | |
2156 | CORE_ADDR start_addr, ULONGEST search_space_len, | |
2157 | const gdb_byte *pattern, ULONGEST pattern_len, | |
2158 | CORE_ADDR *found_addrp) | |
2159 | { | |
2160 | /* NOTE: also defined in find.c testcase. */ | |
2161 | #define SEARCH_CHUNK_SIZE 16000 | |
2162 | const unsigned chunk_size = SEARCH_CHUNK_SIZE; | |
2163 | /* Buffer to hold memory contents for searching. */ | |
08388c79 | 2164 | unsigned search_buf_size; |
08388c79 DE |
2165 | |
2166 | search_buf_size = chunk_size + pattern_len - 1; | |
2167 | ||
2168 | /* No point in trying to allocate a buffer larger than the search space. */ | |
2169 | if (search_space_len < search_buf_size) | |
2170 | search_buf_size = search_space_len; | |
2171 | ||
26fcd5d7 | 2172 | gdb::byte_vector search_buf (search_buf_size); |
08388c79 DE |
2173 | |
2174 | /* Prime the search buffer. */ | |
2175 | ||
2176 | if (target_read (ops, TARGET_OBJECT_MEMORY, NULL, | |
26fcd5d7 TT |
2177 | search_buf.data (), start_addr, search_buf_size) |
2178 | != search_buf_size) | |
08388c79 | 2179 | { |
b3dc46ff AB |
2180 | warning (_("Unable to access %s bytes of target " |
2181 | "memory at %s, halting search."), | |
2182 | pulongest (search_buf_size), hex_string (start_addr)); | |
08388c79 DE |
2183 | return -1; |
2184 | } | |
2185 | ||
2186 | /* Perform the search. | |
2187 | ||
2188 | The loop is kept simple by allocating [N + pattern-length - 1] bytes. | |
2189 | When we've scanned N bytes we copy the trailing bytes to the start and | |
2190 | read in another N bytes. */ | |
2191 | ||
2192 | while (search_space_len >= pattern_len) | |
2193 | { | |
2194 | gdb_byte *found_ptr; | |
325fac50 PA |
2195 | unsigned nr_search_bytes |
2196 | = std::min (search_space_len, (ULONGEST) search_buf_size); | |
08388c79 | 2197 | |
26fcd5d7 | 2198 | found_ptr = (gdb_byte *) memmem (search_buf.data (), nr_search_bytes, |
d7f3ff3e | 2199 | pattern, pattern_len); |
08388c79 DE |
2200 | |
2201 | if (found_ptr != NULL) | |
2202 | { | |
26fcd5d7 | 2203 | CORE_ADDR found_addr = start_addr + (found_ptr - search_buf.data ()); |
5d502164 | 2204 | |
08388c79 | 2205 | *found_addrp = found_addr; |
08388c79 DE |
2206 | return 1; |
2207 | } | |
2208 | ||
2209 | /* Not found in this chunk, skip to next chunk. */ | |
2210 | ||
2211 | /* Don't let search_space_len wrap here, it's unsigned. */ | |
2212 | if (search_space_len >= chunk_size) | |
2213 | search_space_len -= chunk_size; | |
2214 | else | |
2215 | search_space_len = 0; | |
2216 | ||
2217 | if (search_space_len >= pattern_len) | |
2218 | { | |
2219 | unsigned keep_len = search_buf_size - chunk_size; | |
8a35fb51 | 2220 | CORE_ADDR read_addr = start_addr + chunk_size + keep_len; |
08388c79 DE |
2221 | int nr_to_read; |
2222 | ||
2223 | /* Copy the trailing part of the previous iteration to the front | |
2224 | of the buffer for the next iteration. */ | |
2225 | gdb_assert (keep_len == pattern_len - 1); | |
26fcd5d7 | 2226 | memcpy (&search_buf[0], &search_buf[chunk_size], keep_len); |
08388c79 | 2227 | |
325fac50 PA |
2228 | nr_to_read = std::min (search_space_len - keep_len, |
2229 | (ULONGEST) chunk_size); | |
08388c79 DE |
2230 | |
2231 | if (target_read (ops, TARGET_OBJECT_MEMORY, NULL, | |
26fcd5d7 | 2232 | &search_buf[keep_len], read_addr, |
08388c79 DE |
2233 | nr_to_read) != nr_to_read) |
2234 | { | |
b3dc46ff | 2235 | warning (_("Unable to access %s bytes of target " |
9b20d036 | 2236 | "memory at %s, halting search."), |
b3dc46ff | 2237 | plongest (nr_to_read), |
08388c79 | 2238 | hex_string (read_addr)); |
08388c79 DE |
2239 | return -1; |
2240 | } | |
2241 | ||
2242 | start_addr += chunk_size; | |
2243 | } | |
2244 | } | |
2245 | ||
2246 | /* Not found. */ | |
2247 | ||
08388c79 DE |
2248 | return 0; |
2249 | } | |
2250 | ||
58a5184e TT |
2251 | /* Default implementation of memory-searching. */ |
2252 | ||
2253 | static int | |
2254 | default_search_memory (struct target_ops *self, | |
2255 | CORE_ADDR start_addr, ULONGEST search_space_len, | |
2256 | const gdb_byte *pattern, ULONGEST pattern_len, | |
2257 | CORE_ADDR *found_addrp) | |
2258 | { | |
2259 | /* Start over from the top of the target stack. */ | |
8b88a78e | 2260 | return simple_search_memory (current_top_target (), |
58a5184e TT |
2261 | start_addr, search_space_len, |
2262 | pattern, pattern_len, found_addrp); | |
2263 | } | |
2264 | ||
08388c79 DE |
2265 | /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the |
2266 | sequence of bytes in PATTERN with length PATTERN_LEN. | |
2267 | ||
2268 | The result is 1 if found, 0 if not found, and -1 if there was an error | |
2269 | requiring halting of the search (e.g. memory read error). | |
2270 | If the pattern is found the address is recorded in FOUND_ADDRP. */ | |
2271 | ||
2272 | int | |
2273 | target_search_memory (CORE_ADDR start_addr, ULONGEST search_space_len, | |
2274 | const gdb_byte *pattern, ULONGEST pattern_len, | |
2275 | CORE_ADDR *found_addrp) | |
2276 | { | |
8b88a78e | 2277 | return current_top_target ()->search_memory (start_addr, search_space_len, |
f6ac5f3d | 2278 | pattern, pattern_len, found_addrp); |
08388c79 DE |
2279 | } |
2280 | ||
8edfe269 DJ |
2281 | /* Look through the currently pushed targets. If none of them will |
2282 | be able to restart the currently running process, issue an error | |
2283 | message. */ | |
2284 | ||
2285 | void | |
2286 | target_require_runnable (void) | |
2287 | { | |
b6a8c27b | 2288 | for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
8edfe269 DJ |
2289 | { |
2290 | /* If this target knows how to create a new program, then | |
2291 | assume we will still be able to after killing the current | |
2292 | one. Either killing and mourning will not pop T, or else | |
2293 | find_default_run_target will find it again. */ | |
f6ac5f3d | 2294 | if (t->can_create_inferior ()) |
8edfe269 DJ |
2295 | return; |
2296 | ||
548740d6 | 2297 | /* Do not worry about targets at certain strata that can not |
8edfe269 DJ |
2298 | create inferiors. Assume they will be pushed again if |
2299 | necessary, and continue to the process_stratum. */ | |
66b4deae | 2300 | if (t->stratum () > process_stratum) |
8edfe269 DJ |
2301 | continue; |
2302 | ||
3e43a32a MS |
2303 | error (_("The \"%s\" target does not support \"run\". " |
2304 | "Try \"help target\" or \"continue\"."), | |
f6ac5f3d | 2305 | t->shortname ()); |
8edfe269 DJ |
2306 | } |
2307 | ||
2308 | /* This function is only called if the target is running. In that | |
2309 | case there should have been a process_stratum target and it | |
c378eb4e | 2310 | should either know how to create inferiors, or not... */ |
9b20d036 | 2311 | internal_error (__FILE__, __LINE__, _("No targets found")); |
8edfe269 DJ |
2312 | } |
2313 | ||
6a3cb8e8 PA |
2314 | /* Whether GDB is allowed to fall back to the default run target for |
2315 | "run", "attach", etc. when no target is connected yet. */ | |
491144b5 | 2316 | static bool auto_connect_native_target = true; |
6a3cb8e8 PA |
2317 | |
2318 | static void | |
2319 | show_auto_connect_native_target (struct ui_file *file, int from_tty, | |
2320 | struct cmd_list_element *c, const char *value) | |
2321 | { | |
2322 | fprintf_filtered (file, | |
2323 | _("Whether GDB may automatically connect to the " | |
2324 | "native target is %s.\n"), | |
2325 | value); | |
2326 | } | |
2327 | ||
d9f719f1 PA |
2328 | /* A pointer to the target that can respond to "run" or "attach". |
2329 | Native targets are always singletons and instantiated early at GDB | |
2330 | startup. */ | |
2331 | static target_ops *the_native_target; | |
2332 | ||
2333 | /* See target.h. */ | |
2334 | ||
2335 | void | |
2336 | set_native_target (target_ops *target) | |
2337 | { | |
2338 | if (the_native_target != NULL) | |
2339 | internal_error (__FILE__, __LINE__, | |
2340 | _("native target already set (\"%s\")."), | |
2341 | the_native_target->longname ()); | |
2342 | ||
2343 | the_native_target = target; | |
2344 | } | |
2345 | ||
2346 | /* See target.h. */ | |
2347 | ||
2348 | target_ops * | |
2349 | get_native_target () | |
2350 | { | |
2351 | return the_native_target; | |
2352 | } | |
2353 | ||
c906108c SS |
2354 | /* Look through the list of possible targets for a target that can |
2355 | execute a run or attach command without any other data. This is | |
2356 | used to locate the default process stratum. | |
2357 | ||
5f667f2d PA |
2358 | If DO_MESG is not NULL, the result is always valid (error() is |
2359 | called for errors); else, return NULL on error. */ | |
c906108c SS |
2360 | |
2361 | static struct target_ops * | |
a121b7c1 | 2362 | find_default_run_target (const char *do_mesg) |
c906108c | 2363 | { |
d9f719f1 PA |
2364 | if (auto_connect_native_target && the_native_target != NULL) |
2365 | return the_native_target; | |
c906108c | 2366 | |
d9f719f1 PA |
2367 | if (do_mesg != NULL) |
2368 | error (_("Don't know how to %s. Try \"help target\"."), do_mesg); | |
2369 | return NULL; | |
c906108c SS |
2370 | } |
2371 | ||
b3ccfe11 | 2372 | /* See target.h. */ |
c906108c | 2373 | |
b3ccfe11 TT |
2374 | struct target_ops * |
2375 | find_attach_target (void) | |
c906108c | 2376 | { |
b3ccfe11 | 2377 | /* If a target on the current stack can attach, use it. */ |
b6a8c27b | 2378 | for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
b3ccfe11 | 2379 | { |
f6ac5f3d | 2380 | if (t->can_attach ()) |
d9f719f1 | 2381 | return t; |
b3ccfe11 | 2382 | } |
c906108c | 2383 | |
b3ccfe11 | 2384 | /* Otherwise, use the default run target for attaching. */ |
d9f719f1 | 2385 | return find_default_run_target ("attach"); |
b84876c2 PA |
2386 | } |
2387 | ||
b3ccfe11 | 2388 | /* See target.h. */ |
b84876c2 | 2389 | |
b3ccfe11 TT |
2390 | struct target_ops * |
2391 | find_run_target (void) | |
9908b566 | 2392 | { |
f6ac5f3d | 2393 | /* If a target on the current stack can run, use it. */ |
b6a8c27b | 2394 | for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
b3ccfe11 | 2395 | { |
f6ac5f3d | 2396 | if (t->can_create_inferior ()) |
d9f719f1 | 2397 | return t; |
b3ccfe11 | 2398 | } |
5d502164 | 2399 | |
b3ccfe11 | 2400 | /* Otherwise, use the default run target. */ |
d9f719f1 | 2401 | return find_default_run_target ("run"); |
9908b566 VP |
2402 | } |
2403 | ||
f6ac5f3d PA |
2404 | bool |
2405 | target_ops::info_proc (const char *args, enum info_proc_what what) | |
2406 | { | |
2407 | return false; | |
2408 | } | |
2409 | ||
145b16a9 UW |
2410 | /* Implement the "info proc" command. */ |
2411 | ||
451b7c33 | 2412 | int |
7bc112c1 | 2413 | target_info_proc (const char *args, enum info_proc_what what) |
145b16a9 UW |
2414 | { |
2415 | struct target_ops *t; | |
2416 | ||
2417 | /* If we're already connected to something that can get us OS | |
2418 | related data, use it. Otherwise, try using the native | |
2419 | target. */ | |
f6ac5f3d PA |
2420 | t = find_target_at (process_stratum); |
2421 | if (t == NULL) | |
145b16a9 UW |
2422 | t = find_default_run_target (NULL); |
2423 | ||
b6a8c27b | 2424 | for (; t != NULL; t = t->beneath ()) |
145b16a9 | 2425 | { |
f6ac5f3d | 2426 | if (t->info_proc (args, what)) |
145b16a9 | 2427 | { |
145b16a9 UW |
2428 | if (targetdebug) |
2429 | fprintf_unfiltered (gdb_stdlog, | |
2430 | "target_info_proc (\"%s\", %d)\n", args, what); | |
2431 | ||
451b7c33 | 2432 | return 1; |
145b16a9 UW |
2433 | } |
2434 | } | |
2435 | ||
451b7c33 | 2436 | return 0; |
145b16a9 UW |
2437 | } |
2438 | ||
03583c20 | 2439 | static int |
2bfc0540 | 2440 | find_default_supports_disable_randomization (struct target_ops *self) |
03583c20 UW |
2441 | { |
2442 | struct target_ops *t; | |
2443 | ||
2444 | t = find_default_run_target (NULL); | |
f6ac5f3d PA |
2445 | if (t != NULL) |
2446 | return t->supports_disable_randomization (); | |
03583c20 UW |
2447 | return 0; |
2448 | } | |
2449 | ||
2450 | int | |
2451 | target_supports_disable_randomization (void) | |
2452 | { | |
8b88a78e | 2453 | return current_top_target ()->supports_disable_randomization (); |
03583c20 | 2454 | } |
9908b566 | 2455 | |
1fb77080 SDJ |
2456 | /* See target/target.h. */ |
2457 | ||
2458 | int | |
2459 | target_supports_multi_process (void) | |
2460 | { | |
8b88a78e | 2461 | return current_top_target ()->supports_multi_process (); |
1fb77080 SDJ |
2462 | } |
2463 | ||
b7b030ad TT |
2464 | /* See target.h. */ |
2465 | ||
9018be22 | 2466 | gdb::optional<gdb::char_vector> |
07e059b5 VP |
2467 | target_get_osdata (const char *type) |
2468 | { | |
07e059b5 VP |
2469 | struct target_ops *t; |
2470 | ||
739ef7fb PA |
2471 | /* If we're already connected to something that can get us OS |
2472 | related data, use it. Otherwise, try using the native | |
2473 | target. */ | |
f6ac5f3d PA |
2474 | t = find_target_at (process_stratum); |
2475 | if (t == NULL) | |
739ef7fb | 2476 | t = find_default_run_target ("get OS data"); |
07e059b5 VP |
2477 | |
2478 | if (!t) | |
9018be22 | 2479 | return {}; |
07e059b5 | 2480 | |
6d097e65 | 2481 | return target_read_stralloc (t, TARGET_OBJECT_OSDATA, type); |
07e059b5 VP |
2482 | } |
2483 | ||
8eaff7cd TT |
2484 | /* Determine the current address space of thread PTID. */ |
2485 | ||
2486 | struct address_space * | |
2487 | target_thread_address_space (ptid_t ptid) | |
2488 | { | |
2489 | struct address_space *aspace; | |
2490 | ||
8b88a78e | 2491 | aspace = current_top_target ()->thread_address_space (ptid); |
8eaff7cd TT |
2492 | gdb_assert (aspace != NULL); |
2493 | ||
8eaff7cd TT |
2494 | return aspace; |
2495 | } | |
2496 | ||
b6a8c27b PA |
2497 | /* See target.h. */ |
2498 | ||
2499 | target_ops * | |
2500 | target_ops::beneath () const | |
2501 | { | |
5b6d1e4f | 2502 | return current_inferior ()->find_target_beneath (this); |
b6a8c27b PA |
2503 | } |
2504 | ||
f6ac5f3d PA |
2505 | void |
2506 | target_ops::close () | |
2507 | { | |
2508 | } | |
2509 | ||
2510 | bool | |
2511 | target_ops::can_attach () | |
2512 | { | |
2513 | return 0; | |
2514 | } | |
2515 | ||
2516 | void | |
2517 | target_ops::attach (const char *, int) | |
2518 | { | |
2519 | gdb_assert_not_reached ("target_ops::attach called"); | |
2520 | } | |
2521 | ||
2522 | bool | |
2523 | target_ops::can_create_inferior () | |
2524 | { | |
2525 | return 0; | |
2526 | } | |
2527 | ||
2528 | void | |
2529 | target_ops::create_inferior (const char *, const std::string &, | |
2530 | char **, int) | |
2531 | { | |
2532 | gdb_assert_not_reached ("target_ops::create_inferior called"); | |
2533 | } | |
2534 | ||
57810aa7 | 2535 | bool |
f6ac5f3d PA |
2536 | target_ops::can_run () |
2537 | { | |
57810aa7 | 2538 | return false; |
f6ac5f3d PA |
2539 | } |
2540 | ||
2541 | int | |
2542 | target_can_run () | |
2543 | { | |
b6a8c27b | 2544 | for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
f6ac5f3d PA |
2545 | { |
2546 | if (t->can_run ()) | |
2547 | return 1; | |
2548 | } | |
2549 | ||
2550 | return 0; | |
2551 | } | |
7313baad UW |
2552 | |
2553 | /* Target file operations. */ | |
2554 | ||
2555 | static struct target_ops * | |
2556 | default_fileio_target (void) | |
2557 | { | |
f6ac5f3d PA |
2558 | struct target_ops *t; |
2559 | ||
7313baad UW |
2560 | /* If we're already connected to something that can perform |
2561 | file I/O, use it. Otherwise, try using the native target. */ | |
f6ac5f3d PA |
2562 | t = find_target_at (process_stratum); |
2563 | if (t != NULL) | |
2564 | return t; | |
2565 | return find_default_run_target ("file I/O"); | |
7313baad UW |
2566 | } |
2567 | ||
1c4b552b GB |
2568 | /* File handle for target file operations. */ |
2569 | ||
5ff79300 | 2570 | struct fileio_fh_t |
1c4b552b | 2571 | { |
20db9c52 PA |
2572 | /* The target on which this file is open. NULL if the target is |
2573 | meanwhile closed while the handle is open. */ | |
5ff79300 | 2574 | target_ops *target; |
1c4b552b GB |
2575 | |
2576 | /* The file descriptor on the target. */ | |
5ff79300 | 2577 | int target_fd; |
1c4b552b | 2578 | |
5ff79300 PA |
2579 | /* Check whether this fileio_fh_t represents a closed file. */ |
2580 | bool is_closed () | |
2581 | { | |
2582 | return target_fd < 0; | |
2583 | } | |
2584 | }; | |
1c4b552b GB |
2585 | |
2586 | /* Vector of currently open file handles. The value returned by | |
2587 | target_fileio_open and passed as the FD argument to other | |
2588 | target_fileio_* functions is an index into this vector. This | |
2589 | vector's entries are never freed; instead, files are marked as | |
2590 | closed, and the handle becomes available for reuse. */ | |
5ff79300 | 2591 | static std::vector<fileio_fh_t> fileio_fhandles; |
1c4b552b GB |
2592 | |
2593 | /* Index into fileio_fhandles of the lowest handle that might be | |
2594 | closed. This permits handle reuse without searching the whole | |
2595 | list each time a new file is opened. */ | |
2596 | static int lowest_closed_fd; | |
2597 | ||
20db9c52 PA |
2598 | /* Invalidate the target associated with open handles that were open |
2599 | on target TARG, since we're about to close (and maybe destroy) the | |
2600 | target. The handles remain open from the client's perspective, but | |
2601 | trying to do anything with them other than closing them will fail | |
2602 | with EIO. */ | |
2603 | ||
2604 | static void | |
2605 | fileio_handles_invalidate_target (target_ops *targ) | |
2606 | { | |
2607 | for (fileio_fh_t &fh : fileio_fhandles) | |
2608 | if (fh.target == targ) | |
2609 | fh.target = NULL; | |
2610 | } | |
2611 | ||
1c4b552b GB |
2612 | /* Acquire a target fileio file descriptor. */ |
2613 | ||
2614 | static int | |
5ff79300 | 2615 | acquire_fileio_fd (target_ops *target, int target_fd) |
1c4b552b | 2616 | { |
1c4b552b | 2617 | /* Search for closed handles to reuse. */ |
5ff79300 PA |
2618 | for (; lowest_closed_fd < fileio_fhandles.size (); lowest_closed_fd++) |
2619 | { | |
2620 | fileio_fh_t &fh = fileio_fhandles[lowest_closed_fd]; | |
2621 | ||
2622 | if (fh.is_closed ()) | |
2623 | break; | |
2624 | } | |
1c4b552b GB |
2625 | |
2626 | /* Push a new handle if no closed handles were found. */ | |
5ff79300 PA |
2627 | if (lowest_closed_fd == fileio_fhandles.size ()) |
2628 | fileio_fhandles.push_back (fileio_fh_t {target, target_fd}); | |
2629 | else | |
2630 | fileio_fhandles[lowest_closed_fd] = {target, target_fd}; | |
1c4b552b | 2631 | |
5ff79300 PA |
2632 | /* Should no longer be marked closed. */ |
2633 | gdb_assert (!fileio_fhandles[lowest_closed_fd].is_closed ()); | |
1c4b552b GB |
2634 | |
2635 | /* Return its index, and start the next lookup at | |
2636 | the next index. */ | |
2637 | return lowest_closed_fd++; | |
2638 | } | |
2639 | ||
2640 | /* Release a target fileio file descriptor. */ | |
2641 | ||
2642 | static void | |
2643 | release_fileio_fd (int fd, fileio_fh_t *fh) | |
2644 | { | |
5ff79300 | 2645 | fh->target_fd = -1; |
325fac50 | 2646 | lowest_closed_fd = std::min (lowest_closed_fd, fd); |
1c4b552b GB |
2647 | } |
2648 | ||
2649 | /* Return a pointer to the fileio_fhandle_t corresponding to FD. */ | |
2650 | ||
5ff79300 PA |
2651 | static fileio_fh_t * |
2652 | fileio_fd_to_fh (int fd) | |
2653 | { | |
2654 | return &fileio_fhandles[fd]; | |
2655 | } | |
1c4b552b | 2656 | |
f6ac5f3d PA |
2657 | |
2658 | /* Default implementations of file i/o methods. We don't want these | |
2659 | to delegate automatically, because we need to know which target | |
2660 | supported the method, in order to call it directly from within | |
2661 | pread/pwrite, etc. */ | |
2662 | ||
2663 | int | |
2664 | target_ops::fileio_open (struct inferior *inf, const char *filename, | |
2665 | int flags, int mode, int warn_if_slow, | |
2666 | int *target_errno) | |
2667 | { | |
2668 | *target_errno = FILEIO_ENOSYS; | |
2669 | return -1; | |
2670 | } | |
2671 | ||
2672 | int | |
2673 | target_ops::fileio_pwrite (int fd, const gdb_byte *write_buf, int len, | |
2674 | ULONGEST offset, int *target_errno) | |
2675 | { | |
2676 | *target_errno = FILEIO_ENOSYS; | |
2677 | return -1; | |
2678 | } | |
2679 | ||
2680 | int | |
2681 | target_ops::fileio_pread (int fd, gdb_byte *read_buf, int len, | |
2682 | ULONGEST offset, int *target_errno) | |
2683 | { | |
2684 | *target_errno = FILEIO_ENOSYS; | |
2685 | return -1; | |
2686 | } | |
2687 | ||
2688 | int | |
2689 | target_ops::fileio_fstat (int fd, struct stat *sb, int *target_errno) | |
2690 | { | |
2691 | *target_errno = FILEIO_ENOSYS; | |
2692 | return -1; | |
2693 | } | |
2694 | ||
2695 | int | |
2696 | target_ops::fileio_close (int fd, int *target_errno) | |
2697 | { | |
2698 | *target_errno = FILEIO_ENOSYS; | |
2699 | return -1; | |
2700 | } | |
2701 | ||
2702 | int | |
2703 | target_ops::fileio_unlink (struct inferior *inf, const char *filename, | |
2704 | int *target_errno) | |
2705 | { | |
2706 | *target_errno = FILEIO_ENOSYS; | |
2707 | return -1; | |
2708 | } | |
2709 | ||
2710 | gdb::optional<std::string> | |
2711 | target_ops::fileio_readlink (struct inferior *inf, const char *filename, | |
2712 | int *target_errno) | |
2713 | { | |
2714 | *target_errno = FILEIO_ENOSYS; | |
2715 | return {}; | |
2716 | } | |
2717 | ||
4111f652 | 2718 | /* See target.h. */ |
12e2a5fd | 2719 | |
4111f652 PA |
2720 | int |
2721 | target_fileio_open (struct inferior *inf, const char *filename, | |
2722 | int flags, int mode, bool warn_if_slow, int *target_errno) | |
7313baad | 2723 | { |
b6a8c27b | 2724 | for (target_ops *t = default_fileio_target (); t != NULL; t = t->beneath ()) |
7313baad | 2725 | { |
f6ac5f3d PA |
2726 | int fd = t->fileio_open (inf, filename, flags, mode, |
2727 | warn_if_slow, target_errno); | |
7313baad | 2728 | |
f6ac5f3d PA |
2729 | if (fd == -1 && *target_errno == FILEIO_ENOSYS) |
2730 | continue; | |
1c4b552b | 2731 | |
f6ac5f3d PA |
2732 | if (fd < 0) |
2733 | fd = -1; | |
2734 | else | |
2735 | fd = acquire_fileio_fd (t, fd); | |
2736 | ||
2737 | if (targetdebug) | |
2738 | fprintf_unfiltered (gdb_stdlog, | |
4313b8c0 | 2739 | "target_fileio_open (%d,%s,0x%x,0%o,%d)" |
07c138c8 GB |
2740 | " = %d (%d)\n", |
2741 | inf == NULL ? 0 : inf->num, | |
7313baad | 2742 | filename, flags, mode, |
4313b8c0 GB |
2743 | warn_if_slow, fd, |
2744 | fd != -1 ? 0 : *target_errno); | |
f6ac5f3d | 2745 | return fd; |
7313baad UW |
2746 | } |
2747 | ||
2748 | *target_errno = FILEIO_ENOSYS; | |
2749 | return -1; | |
2750 | } | |
2751 | ||
12e2a5fd GB |
2752 | /* See target.h. */ |
2753 | ||
7313baad UW |
2754 | int |
2755 | target_fileio_pwrite (int fd, const gdb_byte *write_buf, int len, | |
2756 | ULONGEST offset, int *target_errno) | |
2757 | { | |
1c4b552b GB |
2758 | fileio_fh_t *fh = fileio_fd_to_fh (fd); |
2759 | int ret = -1; | |
7313baad | 2760 | |
5ff79300 | 2761 | if (fh->is_closed ()) |
1c4b552b | 2762 | *target_errno = EBADF; |
20db9c52 PA |
2763 | else if (fh->target == NULL) |
2764 | *target_errno = EIO; | |
1c4b552b | 2765 | else |
f6ac5f3d PA |
2766 | ret = fh->target->fileio_pwrite (fh->target_fd, write_buf, |
2767 | len, offset, target_errno); | |
7313baad | 2768 | |
1c4b552b GB |
2769 | if (targetdebug) |
2770 | fprintf_unfiltered (gdb_stdlog, | |
2771 | "target_fileio_pwrite (%d,...,%d,%s) " | |
2772 | "= %d (%d)\n", | |
2773 | fd, len, pulongest (offset), | |
2774 | ret, ret != -1 ? 0 : *target_errno); | |
2775 | return ret; | |
7313baad UW |
2776 | } |
2777 | ||
12e2a5fd GB |
2778 | /* See target.h. */ |
2779 | ||
7313baad UW |
2780 | int |
2781 | target_fileio_pread (int fd, gdb_byte *read_buf, int len, | |
2782 | ULONGEST offset, int *target_errno) | |
2783 | { | |
1c4b552b GB |
2784 | fileio_fh_t *fh = fileio_fd_to_fh (fd); |
2785 | int ret = -1; | |
7313baad | 2786 | |
5ff79300 | 2787 | if (fh->is_closed ()) |
1c4b552b | 2788 | *target_errno = EBADF; |
20db9c52 PA |
2789 | else if (fh->target == NULL) |
2790 | *target_errno = EIO; | |
1c4b552b | 2791 | else |
f6ac5f3d PA |
2792 | ret = fh->target->fileio_pread (fh->target_fd, read_buf, |
2793 | len, offset, target_errno); | |
7313baad | 2794 | |
1c4b552b GB |
2795 | if (targetdebug) |
2796 | fprintf_unfiltered (gdb_stdlog, | |
2797 | "target_fileio_pread (%d,...,%d,%s) " | |
2798 | "= %d (%d)\n", | |
2799 | fd, len, pulongest (offset), | |
2800 | ret, ret != -1 ? 0 : *target_errno); | |
9b15c1f0 GB |
2801 | return ret; |
2802 | } | |
2803 | ||
2804 | /* See target.h. */ | |
12e2a5fd | 2805 | |
9b15c1f0 GB |
2806 | int |
2807 | target_fileio_fstat (int fd, struct stat *sb, int *target_errno) | |
2808 | { | |
2809 | fileio_fh_t *fh = fileio_fd_to_fh (fd); | |
2810 | int ret = -1; | |
2811 | ||
5ff79300 | 2812 | if (fh->is_closed ()) |
9b15c1f0 | 2813 | *target_errno = EBADF; |
20db9c52 PA |
2814 | else if (fh->target == NULL) |
2815 | *target_errno = EIO; | |
9b15c1f0 | 2816 | else |
f6ac5f3d | 2817 | ret = fh->target->fileio_fstat (fh->target_fd, sb, target_errno); |
9b15c1f0 GB |
2818 | |
2819 | if (targetdebug) | |
2820 | fprintf_unfiltered (gdb_stdlog, | |
2821 | "target_fileio_fstat (%d) = %d (%d)\n", | |
2822 | fd, ret, ret != -1 ? 0 : *target_errno); | |
1c4b552b | 2823 | return ret; |
7313baad UW |
2824 | } |
2825 | ||
12e2a5fd GB |
2826 | /* See target.h. */ |
2827 | ||
7313baad UW |
2828 | int |
2829 | target_fileio_close (int fd, int *target_errno) | |
2830 | { | |
1c4b552b GB |
2831 | fileio_fh_t *fh = fileio_fd_to_fh (fd); |
2832 | int ret = -1; | |
7313baad | 2833 | |
5ff79300 | 2834 | if (fh->is_closed ()) |
1c4b552b GB |
2835 | *target_errno = EBADF; |
2836 | else | |
7313baad | 2837 | { |
20db9c52 | 2838 | if (fh->target != NULL) |
f6ac5f3d PA |
2839 | ret = fh->target->fileio_close (fh->target_fd, |
2840 | target_errno); | |
20db9c52 PA |
2841 | else |
2842 | ret = 0; | |
1c4b552b | 2843 | release_fileio_fd (fd, fh); |
7313baad UW |
2844 | } |
2845 | ||
1c4b552b GB |
2846 | if (targetdebug) |
2847 | fprintf_unfiltered (gdb_stdlog, | |
2848 | "target_fileio_close (%d) = %d (%d)\n", | |
2849 | fd, ret, ret != -1 ? 0 : *target_errno); | |
2850 | return ret; | |
7313baad UW |
2851 | } |
2852 | ||
12e2a5fd GB |
2853 | /* See target.h. */ |
2854 | ||
7313baad | 2855 | int |
07c138c8 GB |
2856 | target_fileio_unlink (struct inferior *inf, const char *filename, |
2857 | int *target_errno) | |
7313baad | 2858 | { |
b6a8c27b | 2859 | for (target_ops *t = default_fileio_target (); t != NULL; t = t->beneath ()) |
7313baad | 2860 | { |
f6ac5f3d | 2861 | int ret = t->fileio_unlink (inf, filename, target_errno); |
7313baad | 2862 | |
f6ac5f3d PA |
2863 | if (ret == -1 && *target_errno == FILEIO_ENOSYS) |
2864 | continue; | |
2865 | ||
2866 | if (targetdebug) | |
2867 | fprintf_unfiltered (gdb_stdlog, | |
2868 | "target_fileio_unlink (%d,%s)" | |
2869 | " = %d (%d)\n", | |
2870 | inf == NULL ? 0 : inf->num, filename, | |
2871 | ret, ret != -1 ? 0 : *target_errno); | |
2872 | return ret; | |
7313baad UW |
2873 | } |
2874 | ||
2875 | *target_errno = FILEIO_ENOSYS; | |
2876 | return -1; | |
2877 | } | |
2878 | ||
12e2a5fd GB |
2879 | /* See target.h. */ |
2880 | ||
e0d3522b | 2881 | gdb::optional<std::string> |
07c138c8 GB |
2882 | target_fileio_readlink (struct inferior *inf, const char *filename, |
2883 | int *target_errno) | |
b9e7b9c3 | 2884 | { |
b6a8c27b | 2885 | for (target_ops *t = default_fileio_target (); t != NULL; t = t->beneath ()) |
b9e7b9c3 | 2886 | { |
f6ac5f3d PA |
2887 | gdb::optional<std::string> ret |
2888 | = t->fileio_readlink (inf, filename, target_errno); | |
b9e7b9c3 | 2889 | |
f6ac5f3d PA |
2890 | if (!ret.has_value () && *target_errno == FILEIO_ENOSYS) |
2891 | continue; | |
2892 | ||
2893 | if (targetdebug) | |
2894 | fprintf_unfiltered (gdb_stdlog, | |
2895 | "target_fileio_readlink (%d,%s)" | |
2896 | " = %s (%d)\n", | |
2897 | inf == NULL ? 0 : inf->num, | |
2898 | filename, ret ? ret->c_str () : "(nil)", | |
2899 | ret ? 0 : *target_errno); | |
2900 | return ret; | |
b9e7b9c3 UW |
2901 | } |
2902 | ||
2903 | *target_errno = FILEIO_ENOSYS; | |
e0d3522b | 2904 | return {}; |
b9e7b9c3 UW |
2905 | } |
2906 | ||
770623f7 TT |
2907 | /* Like scoped_fd, but specific to target fileio. */ |
2908 | ||
2909 | class scoped_target_fd | |
7313baad | 2910 | { |
770623f7 TT |
2911 | public: |
2912 | explicit scoped_target_fd (int fd) noexcept | |
2913 | : m_fd (fd) | |
2914 | { | |
2915 | } | |
7313baad | 2916 | |
770623f7 TT |
2917 | ~scoped_target_fd () |
2918 | { | |
2919 | if (m_fd >= 0) | |
2920 | { | |
2921 | int target_errno; | |
2922 | ||
2923 | target_fileio_close (m_fd, &target_errno); | |
2924 | } | |
2925 | } | |
2926 | ||
2927 | DISABLE_COPY_AND_ASSIGN (scoped_target_fd); | |
2928 | ||
2929 | int get () const noexcept | |
2930 | { | |
2931 | return m_fd; | |
2932 | } | |
2933 | ||
2934 | private: | |
2935 | int m_fd; | |
2936 | }; | |
7313baad | 2937 | |
07c138c8 GB |
2938 | /* Read target file FILENAME, in the filesystem as seen by INF. If |
2939 | INF is NULL, use the filesystem seen by the debugger (GDB or, for | |
2940 | remote targets, the remote stub). Store the result in *BUF_P and | |
2941 | return the size of the transferred data. PADDING additional bytes | |
2942 | are available in *BUF_P. This is a helper function for | |
2943 | target_fileio_read_alloc; see the declaration of that function for | |
2944 | more information. */ | |
7313baad | 2945 | |
f7af1fcd JK |
2946 | static LONGEST |
2947 | target_fileio_read_alloc_1 (struct inferior *inf, const char *filename, | |
2948 | gdb_byte **buf_p, int padding) | |
2949 | { | |
db1ff28b JK |
2950 | size_t buf_alloc, buf_pos; |
2951 | gdb_byte *buf; | |
2952 | LONGEST n; | |
db1ff28b | 2953 | int target_errno; |
f7af1fcd | 2954 | |
770623f7 | 2955 | scoped_target_fd fd (target_fileio_open (inf, filename, FILEIO_O_RDONLY, |
4111f652 | 2956 | 0700, false, &target_errno)); |
770623f7 | 2957 | if (fd.get () == -1) |
f7af1fcd JK |
2958 | return -1; |
2959 | ||
db1ff28b JK |
2960 | /* Start by reading up to 4K at a time. The target will throttle |
2961 | this number down if necessary. */ | |
2962 | buf_alloc = 4096; | |
224c3ddb | 2963 | buf = (gdb_byte *) xmalloc (buf_alloc); |
db1ff28b JK |
2964 | buf_pos = 0; |
2965 | while (1) | |
2966 | { | |
770623f7 | 2967 | n = target_fileio_pread (fd.get (), &buf[buf_pos], |
db1ff28b JK |
2968 | buf_alloc - buf_pos - padding, buf_pos, |
2969 | &target_errno); | |
2970 | if (n < 0) | |
2971 | { | |
2972 | /* An error occurred. */ | |
db1ff28b JK |
2973 | xfree (buf); |
2974 | return -1; | |
2975 | } | |
2976 | else if (n == 0) | |
2977 | { | |
2978 | /* Read all there was. */ | |
db1ff28b JK |
2979 | if (buf_pos == 0) |
2980 | xfree (buf); | |
2981 | else | |
2982 | *buf_p = buf; | |
2983 | return buf_pos; | |
2984 | } | |
2985 | ||
2986 | buf_pos += n; | |
2987 | ||
2988 | /* If the buffer is filling up, expand it. */ | |
2989 | if (buf_alloc < buf_pos * 2) | |
2990 | { | |
2991 | buf_alloc *= 2; | |
224c3ddb | 2992 | buf = (gdb_byte *) xrealloc (buf, buf_alloc); |
db1ff28b JK |
2993 | } |
2994 | ||
2995 | QUIT; | |
2996 | } | |
f7af1fcd JK |
2997 | } |
2998 | ||
12e2a5fd | 2999 | /* See target.h. */ |
7313baad UW |
3000 | |
3001 | LONGEST | |
07c138c8 GB |
3002 | target_fileio_read_alloc (struct inferior *inf, const char *filename, |
3003 | gdb_byte **buf_p) | |
7313baad | 3004 | { |
07c138c8 | 3005 | return target_fileio_read_alloc_1 (inf, filename, buf_p, 0); |
7313baad UW |
3006 | } |
3007 | ||
db1ff28b | 3008 | /* See target.h. */ |
f7af1fcd | 3009 | |
87028b87 | 3010 | gdb::unique_xmalloc_ptr<char> |
f7af1fcd JK |
3011 | target_fileio_read_stralloc (struct inferior *inf, const char *filename) |
3012 | { | |
db1ff28b JK |
3013 | gdb_byte *buffer; |
3014 | char *bufstr; | |
3015 | LONGEST i, transferred; | |
3016 | ||
3017 | transferred = target_fileio_read_alloc_1 (inf, filename, &buffer, 1); | |
3018 | bufstr = (char *) buffer; | |
3019 | ||
3020 | if (transferred < 0) | |
87028b87 | 3021 | return gdb::unique_xmalloc_ptr<char> (nullptr); |
db1ff28b JK |
3022 | |
3023 | if (transferred == 0) | |
b02f78f9 | 3024 | return make_unique_xstrdup (""); |
db1ff28b JK |
3025 | |
3026 | bufstr[transferred] = 0; | |
3027 | ||
3028 | /* Check for embedded NUL bytes; but allow trailing NULs. */ | |
3029 | for (i = strlen (bufstr); i < transferred; i++) | |
3030 | if (bufstr[i] != 0) | |
3031 | { | |
3032 | warning (_("target file %s " | |
3033 | "contained unexpected null characters"), | |
3034 | filename); | |
3035 | break; | |
3036 | } | |
3037 | ||
87028b87 | 3038 | return gdb::unique_xmalloc_ptr<char> (bufstr); |
f7af1fcd | 3039 | } |
7313baad | 3040 | |
db1ff28b | 3041 | |
e0d24f8d | 3042 | static int |
31568a15 TT |
3043 | default_region_ok_for_hw_watchpoint (struct target_ops *self, |
3044 | CORE_ADDR addr, int len) | |
e0d24f8d | 3045 | { |
f5656ead | 3046 | return (len <= gdbarch_ptr_bit (target_gdbarch ()) / TARGET_CHAR_BIT); |
ccaa32c7 GS |
3047 | } |
3048 | ||
5009afc5 AS |
3049 | static int |
3050 | default_watchpoint_addr_within_range (struct target_ops *target, | |
3051 | CORE_ADDR addr, | |
3052 | CORE_ADDR start, int length) | |
3053 | { | |
3054 | return addr >= start && addr < start + length; | |
3055 | } | |
3056 | ||
8b06beed TT |
3057 | /* See target.h. */ |
3058 | ||
a1740ee1 PA |
3059 | target_ops * |
3060 | target_stack::find_beneath (const target_ops *t) const | |
8b06beed | 3061 | { |
a1740ee1 | 3062 | /* Look for a non-empty slot at stratum levels beneath T's. */ |
66b4deae | 3063 | for (int stratum = t->stratum () - 1; stratum >= 0; --stratum) |
a1740ee1 PA |
3064 | if (m_stack[stratum] != NULL) |
3065 | return m_stack[stratum]; | |
8b06beed TT |
3066 | |
3067 | return NULL; | |
3068 | } | |
3069 | ||
a1740ee1 PA |
3070 | /* See target.h. */ |
3071 | ||
3072 | struct target_ops * | |
3073 | find_target_at (enum strata stratum) | |
3074 | { | |
5b6d1e4f | 3075 | return current_inferior ()->target_at (stratum); |
a1740ee1 PA |
3076 | } |
3077 | ||
c906108c | 3078 | \f |
0f48b757 PA |
3079 | |
3080 | /* See target.h */ | |
3081 | ||
3082 | void | |
3083 | target_announce_detach (int from_tty) | |
3084 | { | |
3085 | pid_t pid; | |
a121b7c1 | 3086 | const char *exec_file; |
0f48b757 PA |
3087 | |
3088 | if (!from_tty) | |
3089 | return; | |
3090 | ||
3091 | exec_file = get_exec_file (0); | |
3092 | if (exec_file == NULL) | |
3093 | exec_file = ""; | |
3094 | ||
e99b03dc | 3095 | pid = inferior_ptid.pid (); |
0f48b757 | 3096 | printf_unfiltered (_("Detaching from program: %s, %s\n"), exec_file, |
a068643d | 3097 | target_pid_to_str (ptid_t (pid)).c_str ()); |
0f48b757 PA |
3098 | } |
3099 | ||
c906108c SS |
3100 | /* The inferior process has died. Long live the inferior! */ |
3101 | ||
3102 | void | |
fba45db2 | 3103 | generic_mourn_inferior (void) |
c906108c | 3104 | { |
00431a78 | 3105 | inferior *inf = current_inferior (); |
c906108c | 3106 | |
a0776b13 | 3107 | switch_to_no_thread (); |
7f9f62ba | 3108 | |
f59f708a PA |
3109 | /* Mark breakpoints uninserted in case something tries to delete a |
3110 | breakpoint while we delete the inferior's threads (which would | |
3111 | fail, since the inferior is long gone). */ | |
3112 | mark_breakpoints_out (); | |
3113 | ||
00431a78 PA |
3114 | if (inf->pid != 0) |
3115 | exit_inferior (inf); | |
7f9f62ba | 3116 | |
f59f708a PA |
3117 | /* Note this wipes step-resume breakpoints, so needs to be done |
3118 | after exit_inferior, which ends up referencing the step-resume | |
3119 | breakpoints through clear_thread_inferior_resources. */ | |
c906108c | 3120 | breakpoint_init_inferior (inf_exited); |
f59f708a | 3121 | |
c906108c SS |
3122 | registers_changed (); |
3123 | ||
c906108c SS |
3124 | reopen_exec_file (); |
3125 | reinit_frame_cache (); | |
3126 | ||
9a4105ab AC |
3127 | if (deprecated_detach_hook) |
3128 | deprecated_detach_hook (); | |
c906108c SS |
3129 | } |
3130 | \f | |
fd0a2a6f MK |
3131 | /* Convert a normal process ID to a string. Returns the string in a |
3132 | static buffer. */ | |
c906108c | 3133 | |
a068643d | 3134 | std::string |
39f77062 | 3135 | normal_pid_to_str (ptid_t ptid) |
c906108c | 3136 | { |
a068643d | 3137 | return string_printf ("process %d", ptid.pid ()); |
c906108c SS |
3138 | } |
3139 | ||
a068643d | 3140 | static std::string |
770234d3 | 3141 | default_pid_to_str (struct target_ops *ops, ptid_t ptid) |
117de6a9 PA |
3142 | { |
3143 | return normal_pid_to_str (ptid); | |
3144 | } | |
3145 | ||
9b4eba8e HZ |
3146 | /* Error-catcher for target_find_memory_regions. */ |
3147 | static int | |
2e73927c TT |
3148 | dummy_find_memory_regions (struct target_ops *self, |
3149 | find_memory_region_ftype ignore1, void *ignore2) | |
be4d1333 | 3150 | { |
9b4eba8e | 3151 | error (_("Command not implemented for this target.")); |
be4d1333 MS |
3152 | return 0; |
3153 | } | |
3154 | ||
9b4eba8e HZ |
3155 | /* Error-catcher for target_make_corefile_notes. */ |
3156 | static char * | |
fc6691b2 TT |
3157 | dummy_make_corefile_notes (struct target_ops *self, |
3158 | bfd *ignore1, int *ignore2) | |
be4d1333 | 3159 | { |
9b4eba8e | 3160 | error (_("Command not implemented for this target.")); |
be4d1333 MS |
3161 | return NULL; |
3162 | } | |
3163 | ||
f6ac5f3d PA |
3164 | #include "target-delegates.c" |
3165 | ||
06b5b831 TT |
3166 | /* The initial current target, so that there is always a semi-valid |
3167 | current target. */ | |
3168 | ||
3169 | static dummy_target the_dummy_target; | |
c906108c | 3170 | |
5b6d1e4f PA |
3171 | /* See target.h. */ |
3172 | ||
3173 | target_ops * | |
3174 | get_dummy_target () | |
3175 | { | |
3176 | return &the_dummy_target; | |
3177 | } | |
3178 | ||
d9f719f1 PA |
3179 | static const target_info dummy_target_info = { |
3180 | "None", | |
3181 | N_("None"), | |
3182 | "" | |
3183 | }; | |
3184 | ||
66b4deae PA |
3185 | strata |
3186 | dummy_target::stratum () const | |
f6ac5f3d | 3187 | { |
66b4deae | 3188 | return dummy_stratum; |
f6ac5f3d PA |
3189 | } |
3190 | ||
66b4deae PA |
3191 | strata |
3192 | debug_target::stratum () const | |
f6ac5f3d | 3193 | { |
66b4deae | 3194 | return debug_stratum; |
f6ac5f3d PA |
3195 | } |
3196 | ||
d9f719f1 PA |
3197 | const target_info & |
3198 | dummy_target::info () const | |
f6ac5f3d | 3199 | { |
d9f719f1 | 3200 | return dummy_target_info; |
f6ac5f3d PA |
3201 | } |
3202 | ||
d9f719f1 PA |
3203 | const target_info & |
3204 | debug_target::info () const | |
f6ac5f3d | 3205 | { |
b6a8c27b | 3206 | return beneath ()->info (); |
f6ac5f3d PA |
3207 | } |
3208 | ||
c906108c | 3209 | \f |
c906108c | 3210 | |
f1c07ab0 | 3211 | void |
460014f5 | 3212 | target_close (struct target_ops *targ) |
f1c07ab0 | 3213 | { |
7fdc1521 TT |
3214 | gdb_assert (!target_is_pushed (targ)); |
3215 | ||
20db9c52 PA |
3216 | fileio_handles_invalidate_target (targ); |
3217 | ||
f6ac5f3d | 3218 | targ->close (); |
947b8855 PA |
3219 | |
3220 | if (targetdebug) | |
460014f5 | 3221 | fprintf_unfiltered (gdb_stdlog, "target_close ()\n"); |
f1c07ab0 AC |
3222 | } |
3223 | ||
28439f5e PA |
3224 | int |
3225 | target_thread_alive (ptid_t ptid) | |
c906108c | 3226 | { |
8b88a78e | 3227 | return current_top_target ()->thread_alive (ptid); |
28439f5e PA |
3228 | } |
3229 | ||
3230 | void | |
e8032dde | 3231 | target_update_thread_list (void) |
28439f5e | 3232 | { |
8b88a78e | 3233 | current_top_target ()->update_thread_list (); |
c906108c SS |
3234 | } |
3235 | ||
d914c394 SS |
3236 | void |
3237 | target_stop (ptid_t ptid) | |
3238 | { | |
3239 | if (!may_stop) | |
3240 | { | |
3241 | warning (_("May not interrupt or stop the target, ignoring attempt")); | |
3242 | return; | |
3243 | } | |
3244 | ||
8b88a78e | 3245 | current_top_target ()->stop (ptid); |
d914c394 SS |
3246 | } |
3247 | ||
bfedc46a | 3248 | void |
e671cd59 | 3249 | target_interrupt () |
bfedc46a PA |
3250 | { |
3251 | if (!may_stop) | |
3252 | { | |
3253 | warning (_("May not interrupt or stop the target, ignoring attempt")); | |
3254 | return; | |
3255 | } | |
3256 | ||
8b88a78e | 3257 | current_top_target ()->interrupt (); |
bfedc46a PA |
3258 | } |
3259 | ||
abc56d60 PA |
3260 | /* See target.h. */ |
3261 | ||
93692b58 PA |
3262 | void |
3263 | target_pass_ctrlc (void) | |
3264 | { | |
5b6d1e4f PA |
3265 | /* Pass the Ctrl-C to the first target that has a thread |
3266 | running. */ | |
3267 | for (inferior *inf : all_inferiors ()) | |
3268 | { | |
3269 | target_ops *proc_target = inf->process_target (); | |
3270 | if (proc_target == NULL) | |
3271 | continue; | |
3272 | ||
43667cc6 | 3273 | for (thread_info *thr : inf->non_exited_threads ()) |
5b6d1e4f PA |
3274 | { |
3275 | /* A thread can be THREAD_STOPPED and executing, while | |
3276 | running an infcall. */ | |
3277 | if (thr->state == THREAD_RUNNING || thr->executing) | |
3278 | { | |
3279 | /* We can get here quite deep in target layers. Avoid | |
3280 | switching thread context or anything that would | |
3281 | communicate with the target (e.g., to fetch | |
3282 | registers), or flushing e.g., the frame cache. We | |
3283 | just switch inferior in order to be able to call | |
3284 | through the target_stack. */ | |
3285 | scoped_restore_current_inferior restore_inferior; | |
3286 | set_current_inferior (inf); | |
3287 | current_top_target ()->pass_ctrlc (); | |
3288 | return; | |
3289 | } | |
3290 | } | |
3291 | } | |
93692b58 PA |
3292 | } |
3293 | ||
3294 | /* See target.h. */ | |
3295 | ||
3296 | void | |
3297 | default_target_pass_ctrlc (struct target_ops *ops) | |
3298 | { | |
e671cd59 | 3299 | target_interrupt (); |
93692b58 PA |
3300 | } |
3301 | ||
f8c1d06b GB |
3302 | /* See target/target.h. */ |
3303 | ||
3304 | void | |
03f4463b | 3305 | target_stop_and_wait (ptid_t ptid) |
f8c1d06b GB |
3306 | { |
3307 | struct target_waitstatus status; | |
491144b5 | 3308 | bool was_non_stop = non_stop; |
f8c1d06b | 3309 | |
491144b5 | 3310 | non_stop = true; |
f8c1d06b GB |
3311 | target_stop (ptid); |
3312 | ||
3313 | memset (&status, 0, sizeof (status)); | |
3314 | target_wait (ptid, &status, 0); | |
3315 | ||
3316 | non_stop = was_non_stop; | |
3317 | } | |
3318 | ||
3319 | /* See target/target.h. */ | |
3320 | ||
3321 | void | |
03f4463b | 3322 | target_continue_no_signal (ptid_t ptid) |
f8c1d06b GB |
3323 | { |
3324 | target_resume (ptid, 0, GDB_SIGNAL_0); | |
3325 | } | |
3326 | ||
049a8570 SDJ |
3327 | /* See target/target.h. */ |
3328 | ||
3329 | void | |
3330 | target_continue (ptid_t ptid, enum gdb_signal signal) | |
3331 | { | |
3332 | target_resume (ptid, 0, signal); | |
3333 | } | |
3334 | ||
fdbac7d8 | 3335 | /* Concatenate ELEM to LIST, a comma-separated list. */ |
09826ec5 | 3336 | |
09ce46f2 SM |
3337 | static void |
3338 | str_comma_list_concat_elem (std::string *list, const char *elem) | |
09826ec5 | 3339 | { |
09ce46f2 SM |
3340 | if (!list->empty ()) |
3341 | list->append (", "); | |
3342 | ||
3343 | list->append (elem); | |
09826ec5 PA |
3344 | } |
3345 | ||
3346 | /* Helper for target_options_to_string. If OPT is present in | |
3347 | TARGET_OPTIONS, append the OPT_STR (string version of OPT) in RET. | |
09ce46f2 | 3348 | OPT is removed from TARGET_OPTIONS. */ |
09826ec5 | 3349 | |
09ce46f2 | 3350 | static void |
b60cea74 TT |
3351 | do_option (target_wait_flags *target_options, std::string *ret, |
3352 | target_wait_flag opt, const char *opt_str) | |
09826ec5 PA |
3353 | { |
3354 | if ((*target_options & opt) != 0) | |
3355 | { | |
09ce46f2 | 3356 | str_comma_list_concat_elem (ret, opt_str); |
09826ec5 PA |
3357 | *target_options &= ~opt; |
3358 | } | |
09826ec5 PA |
3359 | } |
3360 | ||
fdbac7d8 SM |
3361 | /* See target.h. */ |
3362 | ||
09ce46f2 | 3363 | std::string |
b60cea74 | 3364 | target_options_to_string (target_wait_flags target_options) |
09826ec5 | 3365 | { |
09ce46f2 | 3366 | std::string ret; |
09826ec5 PA |
3367 | |
3368 | #define DO_TARG_OPTION(OPT) \ | |
09ce46f2 | 3369 | do_option (&target_options, &ret, OPT, #OPT) |
09826ec5 PA |
3370 | |
3371 | DO_TARG_OPTION (TARGET_WNOHANG); | |
3372 | ||
3373 | if (target_options != 0) | |
09ce46f2 | 3374 | str_comma_list_concat_elem (&ret, "unknown???"); |
09826ec5 | 3375 | |
09826ec5 PA |
3376 | return ret; |
3377 | } | |
3378 | ||
28439f5e PA |
3379 | void |
3380 | target_fetch_registers (struct regcache *regcache, int regno) | |
c906108c | 3381 | { |
8b88a78e | 3382 | current_top_target ()->fetch_registers (regcache, regno); |
ad5989bd | 3383 | if (targetdebug) |
ef79d9a3 | 3384 | regcache->debug_print_register ("target_fetch_registers", regno); |
c906108c SS |
3385 | } |
3386 | ||
28439f5e PA |
3387 | void |
3388 | target_store_registers (struct regcache *regcache, int regno) | |
c906108c | 3389 | { |
d914c394 SS |
3390 | if (!may_write_registers) |
3391 | error (_("Writing to registers is not allowed (regno %d)"), regno); | |
3392 | ||
8b88a78e | 3393 | current_top_target ()->store_registers (regcache, regno); |
6b84065d | 3394 | if (targetdebug) |
28439f5e | 3395 | { |
ef79d9a3 | 3396 | regcache->debug_print_register ("target_store_registers", regno); |
28439f5e | 3397 | } |
c906108c SS |
3398 | } |
3399 | ||
dc146f7c VP |
3400 | int |
3401 | target_core_of_thread (ptid_t ptid) | |
3402 | { | |
8b88a78e | 3403 | return current_top_target ()->core_of_thread (ptid); |
dc146f7c VP |
3404 | } |
3405 | ||
936d2992 PA |
3406 | int |
3407 | simple_verify_memory (struct target_ops *ops, | |
3408 | const gdb_byte *data, CORE_ADDR lma, ULONGEST size) | |
3409 | { | |
3410 | LONGEST total_xfered = 0; | |
3411 | ||
3412 | while (total_xfered < size) | |
3413 | { | |
3414 | ULONGEST xfered_len; | |
3415 | enum target_xfer_status status; | |
3416 | gdb_byte buf[1024]; | |
768adc05 | 3417 | ULONGEST howmuch = std::min<ULONGEST> (sizeof (buf), size - total_xfered); |
936d2992 PA |
3418 | |
3419 | status = target_xfer_partial (ops, TARGET_OBJECT_MEMORY, NULL, | |
3420 | buf, NULL, lma + total_xfered, howmuch, | |
3421 | &xfered_len); | |
3422 | if (status == TARGET_XFER_OK | |
3423 | && memcmp (data + total_xfered, buf, xfered_len) == 0) | |
3424 | { | |
3425 | total_xfered += xfered_len; | |
3426 | QUIT; | |
3427 | } | |
3428 | else | |
3429 | return 0; | |
3430 | } | |
3431 | return 1; | |
3432 | } | |
3433 | ||
3434 | /* Default implementation of memory verification. */ | |
3435 | ||
3436 | static int | |
3437 | default_verify_memory (struct target_ops *self, | |
3438 | const gdb_byte *data, CORE_ADDR memaddr, ULONGEST size) | |
3439 | { | |
3440 | /* Start over from the top of the target stack. */ | |
8b88a78e | 3441 | return simple_verify_memory (current_top_target (), |
936d2992 PA |
3442 | data, memaddr, size); |
3443 | } | |
3444 | ||
4a5e7a5b PA |
3445 | int |
3446 | target_verify_memory (const gdb_byte *data, CORE_ADDR memaddr, ULONGEST size) | |
3447 | { | |
8b88a78e | 3448 | return current_top_target ()->verify_memory (data, memaddr, size); |
4a5e7a5b PA |
3449 | } |
3450 | ||
9c06b0b4 TJB |
3451 | /* The documentation for this function is in its prototype declaration in |
3452 | target.h. */ | |
3453 | ||
3454 | int | |
f4b0a671 SM |
3455 | target_insert_mask_watchpoint (CORE_ADDR addr, CORE_ADDR mask, |
3456 | enum target_hw_bp_type rw) | |
9c06b0b4 | 3457 | { |
8b88a78e | 3458 | return current_top_target ()->insert_mask_watchpoint (addr, mask, rw); |
9c06b0b4 TJB |
3459 | } |
3460 | ||
3461 | /* The documentation for this function is in its prototype declaration in | |
3462 | target.h. */ | |
3463 | ||
3464 | int | |
f4b0a671 SM |
3465 | target_remove_mask_watchpoint (CORE_ADDR addr, CORE_ADDR mask, |
3466 | enum target_hw_bp_type rw) | |
9c06b0b4 | 3467 | { |
8b88a78e | 3468 | return current_top_target ()->remove_mask_watchpoint (addr, mask, rw); |
9c06b0b4 TJB |
3469 | } |
3470 | ||
3471 | /* The documentation for this function is in its prototype declaration | |
3472 | in target.h. */ | |
3473 | ||
3474 | int | |
3475 | target_masked_watch_num_registers (CORE_ADDR addr, CORE_ADDR mask) | |
3476 | { | |
8b88a78e | 3477 | return current_top_target ()->masked_watch_num_registers (addr, mask); |
9c06b0b4 TJB |
3478 | } |
3479 | ||
f1310107 TJB |
3480 | /* The documentation for this function is in its prototype declaration |
3481 | in target.h. */ | |
3482 | ||
3483 | int | |
3484 | target_ranged_break_num_registers (void) | |
3485 | { | |
8b88a78e | 3486 | return current_top_target ()->ranged_break_num_registers (); |
f1310107 TJB |
3487 | } |
3488 | ||
02d27625 MM |
3489 | /* See target.h. */ |
3490 | ||
02d27625 | 3491 | struct btrace_target_info * |
f4abbc16 | 3492 | target_enable_btrace (ptid_t ptid, const struct btrace_config *conf) |
02d27625 | 3493 | { |
8b88a78e | 3494 | return current_top_target ()->enable_btrace (ptid, conf); |
02d27625 MM |
3495 | } |
3496 | ||
3497 | /* See target.h. */ | |
3498 | ||
3499 | void | |
3500 | target_disable_btrace (struct btrace_target_info *btinfo) | |
3501 | { | |
8b88a78e | 3502 | current_top_target ()->disable_btrace (btinfo); |
02d27625 MM |
3503 | } |
3504 | ||
3505 | /* See target.h. */ | |
3506 | ||
3507 | void | |
3508 | target_teardown_btrace (struct btrace_target_info *btinfo) | |
3509 | { | |
8b88a78e | 3510 | current_top_target ()->teardown_btrace (btinfo); |
02d27625 MM |
3511 | } |
3512 | ||
3513 | /* See target.h. */ | |
3514 | ||
969c39fb | 3515 | enum btrace_error |
734b0e4b | 3516 | target_read_btrace (struct btrace_data *btrace, |
969c39fb | 3517 | struct btrace_target_info *btinfo, |
02d27625 MM |
3518 | enum btrace_read_type type) |
3519 | { | |
8b88a78e | 3520 | return current_top_target ()->read_btrace (btrace, btinfo, type); |
02d27625 MM |
3521 | } |
3522 | ||
d02ed0bb MM |
3523 | /* See target.h. */ |
3524 | ||
f4abbc16 MM |
3525 | const struct btrace_config * |
3526 | target_btrace_conf (const struct btrace_target_info *btinfo) | |
3527 | { | |
8b88a78e | 3528 | return current_top_target ()->btrace_conf (btinfo); |
f4abbc16 MM |
3529 | } |
3530 | ||
3531 | /* See target.h. */ | |
3532 | ||
7c1687a9 MM |
3533 | void |
3534 | target_stop_recording (void) | |
3535 | { | |
8b88a78e | 3536 | current_top_target ()->stop_recording (); |
7c1687a9 MM |
3537 | } |
3538 | ||
3539 | /* See target.h. */ | |
3540 | ||
d02ed0bb | 3541 | void |
85e1311a | 3542 | target_save_record (const char *filename) |
d02ed0bb | 3543 | { |
8b88a78e | 3544 | current_top_target ()->save_record (filename); |
d02ed0bb MM |
3545 | } |
3546 | ||
3547 | /* See target.h. */ | |
3548 | ||
3549 | int | |
f6ac5f3d | 3550 | target_supports_delete_record () |
d02ed0bb | 3551 | { |
8b88a78e | 3552 | return current_top_target ()->supports_delete_record (); |
d02ed0bb MM |
3553 | } |
3554 | ||
3555 | /* See target.h. */ | |
3556 | ||
3557 | void | |
3558 | target_delete_record (void) | |
3559 | { | |
8b88a78e | 3560 | current_top_target ()->delete_record (); |
d02ed0bb MM |
3561 | } |
3562 | ||
3563 | /* See target.h. */ | |
3564 | ||
b158a20f TW |
3565 | enum record_method |
3566 | target_record_method (ptid_t ptid) | |
3567 | { | |
8b88a78e | 3568 | return current_top_target ()->record_method (ptid); |
b158a20f TW |
3569 | } |
3570 | ||
3571 | /* See target.h. */ | |
3572 | ||
d02ed0bb | 3573 | int |
a52eab48 | 3574 | target_record_is_replaying (ptid_t ptid) |
d02ed0bb | 3575 | { |
8b88a78e | 3576 | return current_top_target ()->record_is_replaying (ptid); |
d02ed0bb MM |
3577 | } |
3578 | ||
3579 | /* See target.h. */ | |
3580 | ||
7ff27e9b MM |
3581 | int |
3582 | target_record_will_replay (ptid_t ptid, int dir) | |
3583 | { | |
8b88a78e | 3584 | return current_top_target ()->record_will_replay (ptid, dir); |
7ff27e9b MM |
3585 | } |
3586 | ||
3587 | /* See target.h. */ | |
3588 | ||
797094dd MM |
3589 | void |
3590 | target_record_stop_replaying (void) | |
3591 | { | |
8b88a78e | 3592 | current_top_target ()->record_stop_replaying (); |
797094dd MM |
3593 | } |
3594 | ||
3595 | /* See target.h. */ | |
3596 | ||
d02ed0bb MM |
3597 | void |
3598 | target_goto_record_begin (void) | |
3599 | { | |
8b88a78e | 3600 | current_top_target ()->goto_record_begin (); |
d02ed0bb MM |
3601 | } |
3602 | ||
3603 | /* See target.h. */ | |
3604 | ||
3605 | void | |
3606 | target_goto_record_end (void) | |
3607 | { | |
8b88a78e | 3608 | current_top_target ()->goto_record_end (); |
d02ed0bb MM |
3609 | } |
3610 | ||
3611 | /* See target.h. */ | |
3612 | ||
3613 | void | |
3614 | target_goto_record (ULONGEST insn) | |
3615 | { | |
8b88a78e | 3616 | current_top_target ()->goto_record (insn); |
d02ed0bb MM |
3617 | } |
3618 | ||
67c86d06 MM |
3619 | /* See target.h. */ |
3620 | ||
3621 | void | |
9a24775b | 3622 | target_insn_history (int size, gdb_disassembly_flags flags) |
67c86d06 | 3623 | { |
8b88a78e | 3624 | current_top_target ()->insn_history (size, flags); |
67c86d06 MM |
3625 | } |
3626 | ||
3627 | /* See target.h. */ | |
3628 | ||
3629 | void | |
9a24775b PA |
3630 | target_insn_history_from (ULONGEST from, int size, |
3631 | gdb_disassembly_flags flags) | |
67c86d06 | 3632 | { |
8b88a78e | 3633 | current_top_target ()->insn_history_from (from, size, flags); |
67c86d06 MM |
3634 | } |
3635 | ||
3636 | /* See target.h. */ | |
3637 | ||
3638 | void | |
9a24775b PA |
3639 | target_insn_history_range (ULONGEST begin, ULONGEST end, |
3640 | gdb_disassembly_flags flags) | |
67c86d06 | 3641 | { |
8b88a78e | 3642 | current_top_target ()->insn_history_range (begin, end, flags); |
67c86d06 MM |
3643 | } |
3644 | ||
15984c13 MM |
3645 | /* See target.h. */ |
3646 | ||
3647 | void | |
0cb7c7b0 | 3648 | target_call_history (int size, record_print_flags flags) |
15984c13 | 3649 | { |
8b88a78e | 3650 | current_top_target ()->call_history (size, flags); |
15984c13 MM |
3651 | } |
3652 | ||
3653 | /* See target.h. */ | |
3654 | ||
3655 | void | |
0cb7c7b0 | 3656 | target_call_history_from (ULONGEST begin, int size, record_print_flags flags) |
15984c13 | 3657 | { |
8b88a78e | 3658 | current_top_target ()->call_history_from (begin, size, flags); |
15984c13 MM |
3659 | } |
3660 | ||
3661 | /* See target.h. */ | |
3662 | ||
3663 | void | |
0cb7c7b0 | 3664 | target_call_history_range (ULONGEST begin, ULONGEST end, record_print_flags flags) |
15984c13 | 3665 | { |
8b88a78e | 3666 | current_top_target ()->call_history_range (begin, end, flags); |
15984c13 MM |
3667 | } |
3668 | ||
ea001bdc MM |
3669 | /* See target.h. */ |
3670 | ||
3671 | const struct frame_unwind * | |
3672 | target_get_unwinder (void) | |
3673 | { | |
8b88a78e | 3674 | return current_top_target ()->get_unwinder (); |
ea001bdc MM |
3675 | } |
3676 | ||
3677 | /* See target.h. */ | |
3678 | ||
3679 | const struct frame_unwind * | |
3680 | target_get_tailcall_unwinder (void) | |
3681 | { | |
8b88a78e | 3682 | return current_top_target ()->get_tailcall_unwinder (); |
ea001bdc MM |
3683 | } |
3684 | ||
5fff78c4 MM |
3685 | /* See target.h. */ |
3686 | ||
3687 | void | |
3688 | target_prepare_to_generate_core (void) | |
3689 | { | |
8b88a78e | 3690 | current_top_target ()->prepare_to_generate_core (); |
5fff78c4 MM |
3691 | } |
3692 | ||
3693 | /* See target.h. */ | |
3694 | ||
3695 | void | |
3696 | target_done_generating_core (void) | |
3697 | { | |
8b88a78e | 3698 | current_top_target ()->done_generating_core (); |
5fff78c4 MM |
3699 | } |
3700 | ||
c906108c | 3701 | \f |
c5aa993b JM |
3702 | |
3703 | static char targ_desc[] = | |
3e43a32a MS |
3704 | "Names of targets and files being debugged.\nShows the entire \ |
3705 | stack of targets currently in use (including the exec-file,\n\ | |
c906108c SS |
3706 | core-file, and process, if any), as well as the symbol file name."; |
3707 | ||
a53f3625 | 3708 | static void |
a30bf1f1 TT |
3709 | default_rcmd (struct target_ops *self, const char *command, |
3710 | struct ui_file *output) | |
a53f3625 TT |
3711 | { |
3712 | error (_("\"monitor\" command not supported by this target.")); | |
3713 | } | |
3714 | ||
96baa820 | 3715 | static void |
0b39b52e | 3716 | do_monitor_command (const char *cmd, int from_tty) |
96baa820 | 3717 | { |
96baa820 JM |
3718 | target_rcmd (cmd, gdb_stdtarg); |
3719 | } | |
3720 | ||
78cbbba8 LM |
3721 | /* Erases all the memory regions marked as flash. CMD and FROM_TTY are |
3722 | ignored. */ | |
3723 | ||
3724 | void | |
0b39b52e | 3725 | flash_erase_command (const char *cmd, int from_tty) |
78cbbba8 LM |
3726 | { |
3727 | /* Used to communicate termination of flash operations to the target. */ | |
3728 | bool found_flash_region = false; | |
78cbbba8 LM |
3729 | struct gdbarch *gdbarch = target_gdbarch (); |
3730 | ||
a664f67e | 3731 | std::vector<mem_region> mem_regions = target_memory_map (); |
78cbbba8 LM |
3732 | |
3733 | /* Iterate over all memory regions. */ | |
a664f67e | 3734 | for (const mem_region &m : mem_regions) |
78cbbba8 | 3735 | { |
78cbbba8 | 3736 | /* Is this a flash memory region? */ |
a664f67e | 3737 | if (m.attrib.mode == MEM_FLASH) |
78cbbba8 LM |
3738 | { |
3739 | found_flash_region = true; | |
a664f67e | 3740 | target_flash_erase (m.lo, m.hi - m.lo); |
78cbbba8 | 3741 | |
76f9c9cf | 3742 | ui_out_emit_tuple tuple_emitter (current_uiout, "erased-regions"); |
78cbbba8 LM |
3743 | |
3744 | current_uiout->message (_("Erasing flash memory region at address ")); | |
ca8d69be | 3745 | current_uiout->field_core_addr ("address", gdbarch, m.lo); |
78cbbba8 | 3746 | current_uiout->message (", size = "); |
33eca680 | 3747 | current_uiout->field_string ("size", hex_string (m.hi - m.lo)); |
78cbbba8 | 3748 | current_uiout->message ("\n"); |
78cbbba8 LM |
3749 | } |
3750 | } | |
3751 | ||
3752 | /* Did we do any flash operations? If so, we need to finalize them. */ | |
3753 | if (found_flash_region) | |
3754 | target_flash_done (); | |
3755 | else | |
3756 | current_uiout->message (_("No flash memory regions found.\n")); | |
3757 | } | |
3758 | ||
87680a14 JB |
3759 | /* Print the name of each layers of our target stack. */ |
3760 | ||
3761 | static void | |
d3cb6b99 | 3762 | maintenance_print_target_stack (const char *cmd, int from_tty) |
87680a14 | 3763 | { |
87680a14 JB |
3764 | printf_filtered (_("The current target stack is:\n")); |
3765 | ||
b6a8c27b | 3766 | for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
87680a14 | 3767 | { |
66b4deae | 3768 | if (t->stratum () == debug_stratum) |
f6ac5f3d PA |
3769 | continue; |
3770 | printf_filtered (" - %s (%s)\n", t->shortname (), t->longname ()); | |
87680a14 JB |
3771 | } |
3772 | } | |
3773 | ||
372316f1 PA |
3774 | /* See target.h. */ |
3775 | ||
3776 | void | |
3777 | target_async (int enable) | |
3778 | { | |
3779 | infrun_async (enable); | |
8b88a78e | 3780 | current_top_target ()->async (enable); |
372316f1 PA |
3781 | } |
3782 | ||
65706a29 PA |
3783 | /* See target.h. */ |
3784 | ||
3785 | void | |
3786 | target_thread_events (int enable) | |
3787 | { | |
8b88a78e | 3788 | current_top_target ()->thread_events (enable); |
65706a29 PA |
3789 | } |
3790 | ||
329ea579 PA |
3791 | /* Controls if targets can report that they can/are async. This is |
3792 | just for maintainers to use when debugging gdb. */ | |
491144b5 | 3793 | bool target_async_permitted = true; |
c6ebd6cf VP |
3794 | |
3795 | /* The set command writes to this variable. If the inferior is | |
b5419e49 | 3796 | executing, target_async_permitted is *not* updated. */ |
491144b5 | 3797 | static bool target_async_permitted_1 = true; |
c6ebd6cf VP |
3798 | |
3799 | static void | |
eb4c3f4a | 3800 | maint_set_target_async_command (const char *args, int from_tty, |
329ea579 | 3801 | struct cmd_list_element *c) |
c6ebd6cf | 3802 | { |
c35b1492 | 3803 | if (have_live_inferiors ()) |
c6ebd6cf VP |
3804 | { |
3805 | target_async_permitted_1 = target_async_permitted; | |
3806 | error (_("Cannot change this setting while the inferior is running.")); | |
3807 | } | |
3808 | ||
3809 | target_async_permitted = target_async_permitted_1; | |
3810 | } | |
3811 | ||
3812 | static void | |
329ea579 PA |
3813 | maint_show_target_async_command (struct ui_file *file, int from_tty, |
3814 | struct cmd_list_element *c, | |
3815 | const char *value) | |
c6ebd6cf | 3816 | { |
3e43a32a MS |
3817 | fprintf_filtered (file, |
3818 | _("Controlling the inferior in " | |
3819 | "asynchronous mode is %s.\n"), value); | |
c6ebd6cf VP |
3820 | } |
3821 | ||
fbea99ea PA |
3822 | /* Return true if the target operates in non-stop mode even with "set |
3823 | non-stop off". */ | |
3824 | ||
3825 | static int | |
3826 | target_always_non_stop_p (void) | |
3827 | { | |
8b88a78e | 3828 | return current_top_target ()->always_non_stop_p (); |
fbea99ea PA |
3829 | } |
3830 | ||
3831 | /* See target.h. */ | |
3832 | ||
3833 | int | |
3834 | target_is_non_stop_p (void) | |
3835 | { | |
3836 | return (non_stop | |
3837 | || target_non_stop_enabled == AUTO_BOOLEAN_TRUE | |
3838 | || (target_non_stop_enabled == AUTO_BOOLEAN_AUTO | |
3839 | && target_always_non_stop_p ())); | |
3840 | } | |
3841 | ||
a0714d30 TBA |
3842 | /* See target.h. */ |
3843 | ||
3844 | bool | |
3845 | exists_non_stop_target () | |
3846 | { | |
3847 | if (target_is_non_stop_p ()) | |
3848 | return true; | |
3849 | ||
3850 | scoped_restore_current_thread restore_thread; | |
3851 | ||
3852 | for (inferior *inf : all_inferiors ()) | |
3853 | { | |
3854 | switch_to_inferior_no_thread (inf); | |
3855 | if (target_is_non_stop_p ()) | |
3856 | return true; | |
3857 | } | |
3858 | ||
3859 | return false; | |
3860 | } | |
3861 | ||
fbea99ea PA |
3862 | /* Controls if targets can report that they always run in non-stop |
3863 | mode. This is just for maintainers to use when debugging gdb. */ | |
3864 | enum auto_boolean target_non_stop_enabled = AUTO_BOOLEAN_AUTO; | |
3865 | ||
3866 | /* The set command writes to this variable. If the inferior is | |
3867 | executing, target_non_stop_enabled is *not* updated. */ | |
3868 | static enum auto_boolean target_non_stop_enabled_1 = AUTO_BOOLEAN_AUTO; | |
3869 | ||
3870 | /* Implementation of "maint set target-non-stop". */ | |
3871 | ||
3872 | static void | |
eb4c3f4a | 3873 | maint_set_target_non_stop_command (const char *args, int from_tty, |
fbea99ea PA |
3874 | struct cmd_list_element *c) |
3875 | { | |
3876 | if (have_live_inferiors ()) | |
3877 | { | |
3878 | target_non_stop_enabled_1 = target_non_stop_enabled; | |
3879 | error (_("Cannot change this setting while the inferior is running.")); | |
3880 | } | |
3881 | ||
3882 | target_non_stop_enabled = target_non_stop_enabled_1; | |
3883 | } | |
3884 | ||
3885 | /* Implementation of "maint show target-non-stop". */ | |
3886 | ||
3887 | static void | |
3888 | maint_show_target_non_stop_command (struct ui_file *file, int from_tty, | |
3889 | struct cmd_list_element *c, | |
3890 | const char *value) | |
3891 | { | |
3892 | if (target_non_stop_enabled == AUTO_BOOLEAN_AUTO) | |
3893 | fprintf_filtered (file, | |
3894 | _("Whether the target is always in non-stop mode " | |
3895 | "is %s (currently %s).\n"), value, | |
3896 | target_always_non_stop_p () ? "on" : "off"); | |
3897 | else | |
3898 | fprintf_filtered (file, | |
3899 | _("Whether the target is always in non-stop mode " | |
3900 | "is %s.\n"), value); | |
3901 | } | |
3902 | ||
d914c394 SS |
3903 | /* Temporary copies of permission settings. */ |
3904 | ||
491144b5 CB |
3905 | static bool may_write_registers_1 = true; |
3906 | static bool may_write_memory_1 = true; | |
3907 | static bool may_insert_breakpoints_1 = true; | |
3908 | static bool may_insert_tracepoints_1 = true; | |
3909 | static bool may_insert_fast_tracepoints_1 = true; | |
3910 | static bool may_stop_1 = true; | |
d914c394 SS |
3911 | |
3912 | /* Make the user-set values match the real values again. */ | |
3913 | ||
3914 | void | |
3915 | update_target_permissions (void) | |
3916 | { | |
3917 | may_write_registers_1 = may_write_registers; | |
3918 | may_write_memory_1 = may_write_memory; | |
3919 | may_insert_breakpoints_1 = may_insert_breakpoints; | |
3920 | may_insert_tracepoints_1 = may_insert_tracepoints; | |
3921 | may_insert_fast_tracepoints_1 = may_insert_fast_tracepoints; | |
3922 | may_stop_1 = may_stop; | |
3923 | } | |
3924 | ||
3925 | /* The one function handles (most of) the permission flags in the same | |
3926 | way. */ | |
3927 | ||
3928 | static void | |
eb4c3f4a | 3929 | set_target_permissions (const char *args, int from_tty, |
d914c394 SS |
3930 | struct cmd_list_element *c) |
3931 | { | |
55f6301a | 3932 | if (target_has_execution ()) |
d914c394 SS |
3933 | { |
3934 | update_target_permissions (); | |
3935 | error (_("Cannot change this setting while the inferior is running.")); | |
3936 | } | |
3937 | ||
3938 | /* Make the real values match the user-changed values. */ | |
3939 | may_write_registers = may_write_registers_1; | |
3940 | may_insert_breakpoints = may_insert_breakpoints_1; | |
3941 | may_insert_tracepoints = may_insert_tracepoints_1; | |
3942 | may_insert_fast_tracepoints = may_insert_fast_tracepoints_1; | |
3943 | may_stop = may_stop_1; | |
3944 | update_observer_mode (); | |
3945 | } | |
3946 | ||
3947 | /* Set memory write permission independently of observer mode. */ | |
3948 | ||
3949 | static void | |
eb4c3f4a | 3950 | set_write_memory_permission (const char *args, int from_tty, |
d914c394 SS |
3951 | struct cmd_list_element *c) |
3952 | { | |
3953 | /* Make the real values match the user-changed values. */ | |
3954 | may_write_memory = may_write_memory_1; | |
3955 | update_observer_mode (); | |
3956 | } | |
3957 | ||
6c265988 SM |
3958 | void _initialize_target (); |
3959 | ||
c906108c | 3960 | void |
5b6d1e4f | 3961 | _initialize_target () |
c906108c | 3962 | { |
f6ac5f3d | 3963 | the_debug_target = new debug_target (); |
c906108c | 3964 | |
11db9430 SM |
3965 | add_info ("target", info_target_command, targ_desc); |
3966 | add_info ("files", info_target_command, targ_desc); | |
c906108c | 3967 | |
ccce17b0 | 3968 | add_setshow_zuinteger_cmd ("target", class_maintenance, &targetdebug, _("\ |
85c07804 AC |
3969 | Set target debugging."), _("\ |
3970 | Show target debugging."), _("\ | |
333dabeb | 3971 | When non-zero, target debugging is enabled. Higher numbers are more\n\ |
3cecbbbe TT |
3972 | verbose."), |
3973 | set_targetdebug, | |
ccce17b0 YQ |
3974 | show_targetdebug, |
3975 | &setdebuglist, &showdebuglist); | |
3a11626d | 3976 | |
2bc416ba | 3977 | add_setshow_boolean_cmd ("trust-readonly-sections", class_support, |
7915a72c AC |
3978 | &trust_readonly, _("\ |
3979 | Set mode for reading from readonly sections."), _("\ | |
3980 | Show mode for reading from readonly sections."), _("\ | |
3a11626d MS |
3981 | When this mode is on, memory reads from readonly sections (such as .text)\n\ |
3982 | will be read from the object file instead of from the target. This will\n\ | |
7915a72c | 3983 | result in significant performance improvement for remote targets."), |
2c5b56ce | 3984 | NULL, |
920d2a44 | 3985 | show_trust_readonly, |
e707bbc2 | 3986 | &setlist, &showlist); |
96baa820 JM |
3987 | |
3988 | add_com ("monitor", class_obscure, do_monitor_command, | |
1bedd215 | 3989 | _("Send a command to the remote monitor (remote targets only).")); |
96baa820 | 3990 | |
87680a14 JB |
3991 | add_cmd ("target-stack", class_maintenance, maintenance_print_target_stack, |
3992 | _("Print the name of each layer of the internal target stack."), | |
3993 | &maintenanceprintlist); | |
3994 | ||
c6ebd6cf VP |
3995 | add_setshow_boolean_cmd ("target-async", no_class, |
3996 | &target_async_permitted_1, _("\ | |
3997 | Set whether gdb controls the inferior in asynchronous mode."), _("\ | |
3998 | Show whether gdb controls the inferior in asynchronous mode."), _("\ | |
3999 | Tells gdb whether to control the inferior in asynchronous mode."), | |
329ea579 PA |
4000 | maint_set_target_async_command, |
4001 | maint_show_target_async_command, | |
4002 | &maintenance_set_cmdlist, | |
4003 | &maintenance_show_cmdlist); | |
c6ebd6cf | 4004 | |
fbea99ea PA |
4005 | add_setshow_auto_boolean_cmd ("target-non-stop", no_class, |
4006 | &target_non_stop_enabled_1, _("\ | |
4007 | Set whether gdb always controls the inferior in non-stop mode."), _("\ | |
4008 | Show whether gdb always controls the inferior in non-stop mode."), _("\ | |
4009 | Tells gdb whether to control the inferior in non-stop mode."), | |
4010 | maint_set_target_non_stop_command, | |
4011 | maint_show_target_non_stop_command, | |
4012 | &maintenance_set_cmdlist, | |
4013 | &maintenance_show_cmdlist); | |
4014 | ||
d914c394 SS |
4015 | add_setshow_boolean_cmd ("may-write-registers", class_support, |
4016 | &may_write_registers_1, _("\ | |
4017 | Set permission to write into registers."), _("\ | |
4018 | Show permission to write into registers."), _("\ | |
4019 | When this permission is on, GDB may write into the target's registers.\n\ | |
4020 | Otherwise, any sort of write attempt will result in an error."), | |
4021 | set_target_permissions, NULL, | |
4022 | &setlist, &showlist); | |
4023 | ||
4024 | add_setshow_boolean_cmd ("may-write-memory", class_support, | |
4025 | &may_write_memory_1, _("\ | |
4026 | Set permission to write into target memory."), _("\ | |
4027 | Show permission to write into target memory."), _("\ | |
4028 | When this permission is on, GDB may write into the target's memory.\n\ | |
4029 | Otherwise, any sort of write attempt will result in an error."), | |
4030 | set_write_memory_permission, NULL, | |
4031 | &setlist, &showlist); | |
4032 | ||
4033 | add_setshow_boolean_cmd ("may-insert-breakpoints", class_support, | |
4034 | &may_insert_breakpoints_1, _("\ | |
4035 | Set permission to insert breakpoints in the target."), _("\ | |
4036 | Show permission to insert breakpoints in the target."), _("\ | |
4037 | When this permission is on, GDB may insert breakpoints in the program.\n\ | |
4038 | Otherwise, any sort of insertion attempt will result in an error."), | |
4039 | set_target_permissions, NULL, | |
4040 | &setlist, &showlist); | |
4041 | ||
4042 | add_setshow_boolean_cmd ("may-insert-tracepoints", class_support, | |
4043 | &may_insert_tracepoints_1, _("\ | |
4044 | Set permission to insert tracepoints in the target."), _("\ | |
4045 | Show permission to insert tracepoints in the target."), _("\ | |
4046 | When this permission is on, GDB may insert tracepoints in the program.\n\ | |
4047 | Otherwise, any sort of insertion attempt will result in an error."), | |
4048 | set_target_permissions, NULL, | |
4049 | &setlist, &showlist); | |
4050 | ||
4051 | add_setshow_boolean_cmd ("may-insert-fast-tracepoints", class_support, | |
4052 | &may_insert_fast_tracepoints_1, _("\ | |
4053 | Set permission to insert fast tracepoints in the target."), _("\ | |
4054 | Show permission to insert fast tracepoints in the target."), _("\ | |
4055 | When this permission is on, GDB may insert fast tracepoints.\n\ | |
4056 | Otherwise, any sort of insertion attempt will result in an error."), | |
4057 | set_target_permissions, NULL, | |
4058 | &setlist, &showlist); | |
4059 | ||
4060 | add_setshow_boolean_cmd ("may-interrupt", class_support, | |
4061 | &may_stop_1, _("\ | |
4062 | Set permission to interrupt or signal the target."), _("\ | |
4063 | Show permission to interrupt or signal the target."), _("\ | |
4064 | When this permission is on, GDB may interrupt/stop the target's execution.\n\ | |
4065 | Otherwise, any attempt to interrupt or stop will be ignored."), | |
4066 | set_target_permissions, NULL, | |
4067 | &setlist, &showlist); | |
6a3cb8e8 | 4068 | |
78cbbba8 LM |
4069 | add_com ("flash-erase", no_class, flash_erase_command, |
4070 | _("Erase all flash memory regions.")); | |
4071 | ||
6a3cb8e8 PA |
4072 | add_setshow_boolean_cmd ("auto-connect-native-target", class_support, |
4073 | &auto_connect_native_target, _("\ | |
4074 | Set whether GDB may automatically connect to the native target."), _("\ | |
4075 | Show whether GDB may automatically connect to the native target."), _("\ | |
4076 | When on, and GDB is not connected to a target yet, GDB\n\ | |
4077 | attempts \"run\" and other commands with the native target."), | |
4078 | NULL, show_auto_connect_native_target, | |
4079 | &setlist, &showlist); | |
c906108c | 4080 | } |