Commit | Line | Data |
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c906108c | 1 | /* Select target systems and architectures at runtime for GDB. |
7998dfc3 | 2 | |
42a4f53d | 3 | Copyright (C) 1990-2019 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" |
0747795c | 43 | #include "common/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> |
0747795c | 49 | #include "common/byte-vector.h" |
e671cd59 | 50 | #include "terminal.h" |
d9f719f1 | 51 | #include <unordered_map> |
c906108c | 52 | |
f0f9ff95 TT |
53 | static void generic_tls_error (void) ATTRIBUTE_NORETURN; |
54 | ||
0a4f40a2 | 55 | static void default_terminal_info (struct target_ops *, const char *, int); |
c906108c | 56 | |
5009afc5 AS |
57 | static int default_watchpoint_addr_within_range (struct target_ops *, |
58 | CORE_ADDR, CORE_ADDR, int); | |
59 | ||
31568a15 TT |
60 | static int default_region_ok_for_hw_watchpoint (struct target_ops *, |
61 | CORE_ADDR, int); | |
e0d24f8d | 62 | |
a30bf1f1 | 63 | static void default_rcmd (struct target_ops *, const char *, struct ui_file *); |
a53f3625 | 64 | |
4229b31d TT |
65 | static ptid_t default_get_ada_task_ptid (struct target_ops *self, |
66 | long lwp, long tid); | |
67 | ||
098dba18 TT |
68 | static int default_follow_fork (struct target_ops *self, int follow_child, |
69 | int detach_fork); | |
70 | ||
8d657035 TT |
71 | static void default_mourn_inferior (struct target_ops *self); |
72 | ||
58a5184e TT |
73 | static int default_search_memory (struct target_ops *ops, |
74 | CORE_ADDR start_addr, | |
75 | ULONGEST search_space_len, | |
76 | const gdb_byte *pattern, | |
77 | ULONGEST pattern_len, | |
78 | CORE_ADDR *found_addrp); | |
79 | ||
936d2992 PA |
80 | static int default_verify_memory (struct target_ops *self, |
81 | const gdb_byte *data, | |
82 | CORE_ADDR memaddr, ULONGEST size); | |
83 | ||
c25c4a8b | 84 | static void tcomplain (void) ATTRIBUTE_NORETURN; |
c906108c | 85 | |
a121b7c1 | 86 | static struct target_ops *find_default_run_target (const char *); |
c906108c | 87 | |
0b5a2719 TT |
88 | static int dummy_find_memory_regions (struct target_ops *self, |
89 | find_memory_region_ftype ignore1, | |
90 | void *ignore2); | |
91 | ||
16f796b1 TT |
92 | static char *dummy_make_corefile_notes (struct target_ops *self, |
93 | bfd *ignore1, int *ignore2); | |
94 | ||
7a114964 | 95 | static const char *default_pid_to_str (struct target_ops *ops, ptid_t ptid); |
770234d3 | 96 | |
fe31bf5b TT |
97 | static enum exec_direction_kind default_execution_direction |
98 | (struct target_ops *self); | |
99 | ||
d9f719f1 PA |
100 | /* Mapping between target_info objects (which have address identity) |
101 | and corresponding open/factory function/callback. Each add_target | |
102 | call adds one entry to this map, and registers a "target | |
103 | TARGET_NAME" command that when invoked calls the factory registered | |
104 | here. The target_info object is associated with the command via | |
105 | the command's context. */ | |
106 | static std::unordered_map<const target_info *, target_open_ftype *> | |
107 | target_factories; | |
c906108c SS |
108 | |
109 | /* The initial current target, so that there is always a semi-valid | |
110 | current target. */ | |
111 | ||
f6ac5f3d PA |
112 | static struct target_ops *the_dummy_target; |
113 | static struct target_ops *the_debug_target; | |
c906108c | 114 | |
a1740ee1 PA |
115 | /* The target stack. */ |
116 | ||
117 | static target_stack g_target_stack; | |
118 | ||
c906108c | 119 | /* Top of target stack. */ |
c906108c SS |
120 | /* The target structure we are currently using to talk to a process |
121 | or file or whatever "inferior" we have. */ | |
122 | ||
8b88a78e PA |
123 | target_ops * |
124 | current_top_target () | |
125 | { | |
a1740ee1 | 126 | return g_target_stack.top (); |
8b88a78e | 127 | } |
c906108c SS |
128 | |
129 | /* Command list for target. */ | |
130 | ||
131 | static struct cmd_list_element *targetlist = NULL; | |
132 | ||
cf7a04e8 DJ |
133 | /* Nonzero if we should trust readonly sections from the |
134 | executable when reading memory. */ | |
135 | ||
136 | static int trust_readonly = 0; | |
137 | ||
8defab1a DJ |
138 | /* Nonzero if we should show true memory content including |
139 | memory breakpoint inserted by gdb. */ | |
140 | ||
141 | static int show_memory_breakpoints = 0; | |
142 | ||
d914c394 SS |
143 | /* These globals control whether GDB attempts to perform these |
144 | operations; they are useful for targets that need to prevent | |
145 | inadvertant disruption, such as in non-stop mode. */ | |
146 | ||
147 | int may_write_registers = 1; | |
148 | ||
149 | int may_write_memory = 1; | |
150 | ||
151 | int may_insert_breakpoints = 1; | |
152 | ||
153 | int may_insert_tracepoints = 1; | |
154 | ||
155 | int may_insert_fast_tracepoints = 1; | |
156 | ||
157 | int may_stop = 1; | |
158 | ||
c906108c SS |
159 | /* Non-zero if we want to see trace of target level stuff. */ |
160 | ||
ccce17b0 | 161 | static unsigned int targetdebug = 0; |
3cecbbbe TT |
162 | |
163 | static void | |
eb4c3f4a | 164 | set_targetdebug (const char *args, int from_tty, struct cmd_list_element *c) |
3cecbbbe | 165 | { |
f6ac5f3d PA |
166 | if (targetdebug) |
167 | push_target (the_debug_target); | |
168 | else | |
169 | unpush_target (the_debug_target); | |
3cecbbbe TT |
170 | } |
171 | ||
920d2a44 AC |
172 | static void |
173 | show_targetdebug (struct ui_file *file, int from_tty, | |
174 | struct cmd_list_element *c, const char *value) | |
175 | { | |
176 | fprintf_filtered (file, _("Target debugging is %s.\n"), value); | |
177 | } | |
c906108c | 178 | |
c906108c SS |
179 | /* The user just typed 'target' without the name of a target. */ |
180 | ||
c906108c | 181 | static void |
981a3fb3 | 182 | target_command (const char *arg, int from_tty) |
c906108c SS |
183 | { |
184 | fputs_filtered ("Argument required (target name). Try `help target'\n", | |
185 | gdb_stdout); | |
186 | } | |
187 | ||
c35b1492 PA |
188 | int |
189 | target_has_all_memory_1 (void) | |
190 | { | |
b6a8c27b | 191 | for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
f6ac5f3d | 192 | if (t->has_all_memory ()) |
c35b1492 PA |
193 | return 1; |
194 | ||
195 | return 0; | |
196 | } | |
197 | ||
198 | int | |
199 | target_has_memory_1 (void) | |
200 | { | |
b6a8c27b | 201 | for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
f6ac5f3d | 202 | if (t->has_memory ()) |
c35b1492 PA |
203 | return 1; |
204 | ||
205 | return 0; | |
206 | } | |
207 | ||
208 | int | |
209 | target_has_stack_1 (void) | |
210 | { | |
b6a8c27b | 211 | for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
f6ac5f3d | 212 | if (t->has_stack ()) |
c35b1492 PA |
213 | return 1; |
214 | ||
215 | return 0; | |
216 | } | |
217 | ||
218 | int | |
219 | target_has_registers_1 (void) | |
220 | { | |
b6a8c27b | 221 | for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
f6ac5f3d | 222 | if (t->has_registers ()) |
c35b1492 PA |
223 | return 1; |
224 | ||
225 | return 0; | |
226 | } | |
227 | ||
228 | int | |
aeaec162 | 229 | target_has_execution_1 (ptid_t the_ptid) |
c35b1492 | 230 | { |
b6a8c27b | 231 | for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
f6ac5f3d | 232 | if (t->has_execution (the_ptid)) |
c35b1492 PA |
233 | return 1; |
234 | ||
235 | return 0; | |
236 | } | |
237 | ||
aeaec162 TT |
238 | int |
239 | target_has_execution_current (void) | |
240 | { | |
241 | return target_has_execution_1 (inferior_ptid); | |
242 | } | |
243 | ||
8981c758 TT |
244 | /* This is used to implement the various target commands. */ |
245 | ||
246 | static void | |
eb4c3f4a | 247 | open_target (const char *args, int from_tty, struct cmd_list_element *command) |
8981c758 | 248 | { |
d9f719f1 PA |
249 | auto *ti = static_cast<target_info *> (get_cmd_context (command)); |
250 | target_open_ftype *func = target_factories[ti]; | |
8981c758 TT |
251 | |
252 | if (targetdebug) | |
d9f719f1 PA |
253 | fprintf_unfiltered (gdb_stdlog, "-> %s->open (...)\n", |
254 | ti->shortname); | |
8981c758 | 255 | |
d9f719f1 | 256 | func (args, from_tty); |
8981c758 TT |
257 | |
258 | if (targetdebug) | |
d9f719f1 PA |
259 | fprintf_unfiltered (gdb_stdlog, "<- %s->open (%s, %d)\n", |
260 | ti->shortname, args, from_tty); | |
8981c758 TT |
261 | } |
262 | ||
d9f719f1 | 263 | /* See target.h. */ |
c22a2b88 TT |
264 | |
265 | void | |
d9f719f1 PA |
266 | add_target (const target_info &t, target_open_ftype *func, |
267 | completer_ftype *completer) | |
c22a2b88 TT |
268 | { |
269 | struct cmd_list_element *c; | |
270 | ||
d9f719f1 PA |
271 | auto &func_slot = target_factories[&t]; |
272 | if (func_slot != nullptr) | |
273 | internal_error (__FILE__, __LINE__, | |
274 | _("target already added (\"%s\")."), t.shortname); | |
275 | func_slot = func; | |
c906108c SS |
276 | |
277 | if (targetlist == NULL) | |
1bedd215 AC |
278 | add_prefix_cmd ("target", class_run, target_command, _("\ |
279 | Connect to a target machine or process.\n\ | |
c906108c SS |
280 | The first argument is the type or protocol of the target machine.\n\ |
281 | Remaining arguments are interpreted by the target protocol. For more\n\ | |
282 | information on the arguments for a particular protocol, type\n\ | |
1bedd215 | 283 | `help target ' followed by the protocol name."), |
c906108c | 284 | &targetlist, "target ", 0, &cmdlist); |
d9f719f1 PA |
285 | c = add_cmd (t.shortname, no_class, t.doc, &targetlist); |
286 | set_cmd_context (c, (void *) &t); | |
8981c758 | 287 | set_cmd_sfunc (c, open_target); |
9852c492 YQ |
288 | if (completer != NULL) |
289 | set_cmd_completer (c, completer); | |
290 | } | |
291 | ||
b48d48eb MM |
292 | /* See target.h. */ |
293 | ||
294 | void | |
d9f719f1 | 295 | add_deprecated_target_alias (const target_info &tinfo, const char *alias) |
b48d48eb MM |
296 | { |
297 | struct cmd_list_element *c; | |
298 | char *alt; | |
299 | ||
300 | /* If we use add_alias_cmd, here, we do not get the deprecated warning, | |
301 | see PR cli/15104. */ | |
d9f719f1 | 302 | c = add_cmd (alias, no_class, tinfo.doc, &targetlist); |
8981c758 | 303 | set_cmd_sfunc (c, open_target); |
d9f719f1 PA |
304 | set_cmd_context (c, (void *) &tinfo); |
305 | alt = xstrprintf ("target %s", tinfo.shortname); | |
b48d48eb MM |
306 | deprecate_cmd (c, alt); |
307 | } | |
308 | ||
c906108c SS |
309 | /* Stub functions */ |
310 | ||
7d85a9c0 JB |
311 | void |
312 | target_kill (void) | |
313 | { | |
8b88a78e | 314 | current_top_target ()->kill (); |
7d85a9c0 JB |
315 | } |
316 | ||
11cf8741 | 317 | void |
9cbe5fff | 318 | target_load (const char *arg, int from_tty) |
11cf8741 | 319 | { |
4e5d721f | 320 | target_dcache_invalidate (); |
8b88a78e | 321 | current_top_target ()->load (arg, from_tty); |
11cf8741 JM |
322 | } |
323 | ||
223ffa71 | 324 | /* Define it. */ |
5842f62a | 325 | |
e671cd59 PA |
326 | target_terminal_state target_terminal::m_terminal_state |
327 | = target_terminal_state::is_ours; | |
5842f62a | 328 | |
223ffa71 | 329 | /* See target/target.h. */ |
5842f62a PA |
330 | |
331 | void | |
223ffa71 | 332 | target_terminal::init (void) |
5842f62a | 333 | { |
8b88a78e | 334 | current_top_target ()->terminal_init (); |
5842f62a | 335 | |
e671cd59 | 336 | m_terminal_state = target_terminal_state::is_ours; |
5842f62a PA |
337 | } |
338 | ||
223ffa71 | 339 | /* See target/target.h. */ |
2f99e8fc | 340 | |
d9d2d8b6 | 341 | void |
223ffa71 | 342 | target_terminal::inferior (void) |
d9d2d8b6 | 343 | { |
41fd2b0f PA |
344 | struct ui *ui = current_ui; |
345 | ||
d9d2d8b6 | 346 | /* A background resume (``run&'') should leave GDB in control of the |
3b12939d PA |
347 | terminal. */ |
348 | if (ui->prompt_state != PROMPT_BLOCKED) | |
d9d2d8b6 PA |
349 | return; |
350 | ||
215d3118 PA |
351 | /* Since we always run the inferior in the main console (unless "set |
352 | inferior-tty" is in effect), when some UI other than the main one | |
223ffa71 TT |
353 | calls target_terminal::inferior, then we leave the main UI's |
354 | terminal settings as is. */ | |
215d3118 PA |
355 | if (ui != main_ui) |
356 | return; | |
357 | ||
d9d2d8b6 PA |
358 | /* If GDB is resuming the inferior in the foreground, install |
359 | inferior's terminal modes. */ | |
e671cd59 PA |
360 | |
361 | struct inferior *inf = current_inferior (); | |
362 | ||
363 | if (inf->terminal_state != target_terminal_state::is_inferior) | |
364 | { | |
8b88a78e | 365 | current_top_target ()->terminal_inferior (); |
e671cd59 PA |
366 | inf->terminal_state = target_terminal_state::is_inferior; |
367 | } | |
368 | ||
369 | m_terminal_state = target_terminal_state::is_inferior; | |
370 | ||
371 | /* If the user hit C-c before, pretend that it was hit right | |
372 | here. */ | |
373 | if (check_quit_flag ()) | |
374 | target_pass_ctrlc (); | |
375 | } | |
376 | ||
377 | /* See target/target.h. */ | |
378 | ||
379 | void | |
380 | target_terminal::restore_inferior (void) | |
381 | { | |
382 | struct ui *ui = current_ui; | |
383 | ||
384 | /* See target_terminal::inferior(). */ | |
385 | if (ui->prompt_state != PROMPT_BLOCKED || ui != main_ui) | |
386 | return; | |
387 | ||
388 | /* Restore the terminal settings of inferiors that were in the | |
389 | foreground but are now ours_for_output due to a temporary | |
390 | target_target::ours_for_output() call. */ | |
391 | ||
392 | { | |
393 | scoped_restore_current_inferior restore_inferior; | |
e671cd59 | 394 | |
84b68c77 | 395 | for (::inferior *inf : all_inferiors ()) |
e671cd59 PA |
396 | { |
397 | if (inf->terminal_state == target_terminal_state::is_ours_for_output) | |
398 | { | |
399 | set_current_inferior (inf); | |
8b88a78e | 400 | current_top_target ()->terminal_inferior (); |
e671cd59 PA |
401 | inf->terminal_state = target_terminal_state::is_inferior; |
402 | } | |
403 | } | |
404 | } | |
405 | ||
406 | m_terminal_state = target_terminal_state::is_inferior; | |
93692b58 PA |
407 | |
408 | /* If the user hit C-c before, pretend that it was hit right | |
409 | here. */ | |
410 | if (check_quit_flag ()) | |
411 | target_pass_ctrlc (); | |
5842f62a PA |
412 | } |
413 | ||
e671cd59 PA |
414 | /* Switch terminal state to DESIRED_STATE, either is_ours, or |
415 | is_ours_for_output. */ | |
416 | ||
417 | static void | |
418 | target_terminal_is_ours_kind (target_terminal_state desired_state) | |
419 | { | |
420 | scoped_restore_current_inferior restore_inferior; | |
e671cd59 PA |
421 | |
422 | /* Must do this in two passes. First, have all inferiors save the | |
423 | current terminal settings. Then, after all inferiors have add a | |
424 | chance to safely save the terminal settings, restore GDB's | |
425 | terminal settings. */ | |
426 | ||
08036331 | 427 | for (inferior *inf : all_inferiors ()) |
e671cd59 PA |
428 | { |
429 | if (inf->terminal_state == target_terminal_state::is_inferior) | |
430 | { | |
431 | set_current_inferior (inf); | |
8b88a78e | 432 | current_top_target ()->terminal_save_inferior (); |
e671cd59 PA |
433 | } |
434 | } | |
435 | ||
08036331 | 436 | for (inferior *inf : all_inferiors ()) |
e671cd59 PA |
437 | { |
438 | /* Note we don't check is_inferior here like above because we | |
439 | need to handle 'is_ours_for_output -> is_ours' too. Careful | |
440 | to never transition from 'is_ours' to 'is_ours_for_output', | |
441 | though. */ | |
442 | if (inf->terminal_state != target_terminal_state::is_ours | |
443 | && inf->terminal_state != desired_state) | |
444 | { | |
445 | set_current_inferior (inf); | |
446 | if (desired_state == target_terminal_state::is_ours) | |
8b88a78e | 447 | current_top_target ()->terminal_ours (); |
e671cd59 | 448 | else if (desired_state == target_terminal_state::is_ours_for_output) |
8b88a78e | 449 | current_top_target ()->terminal_ours_for_output (); |
e671cd59 PA |
450 | else |
451 | gdb_assert_not_reached ("unhandled desired state"); | |
452 | inf->terminal_state = desired_state; | |
453 | } | |
454 | } | |
455 | } | |
456 | ||
223ffa71 | 457 | /* See target/target.h. */ |
5842f62a PA |
458 | |
459 | void | |
223ffa71 | 460 | target_terminal::ours () |
5842f62a | 461 | { |
41fd2b0f PA |
462 | struct ui *ui = current_ui; |
463 | ||
223ffa71 | 464 | /* See target_terminal::inferior. */ |
215d3118 PA |
465 | if (ui != main_ui) |
466 | return; | |
467 | ||
e671cd59 | 468 | if (m_terminal_state == target_terminal_state::is_ours) |
5842f62a PA |
469 | return; |
470 | ||
e671cd59 PA |
471 | target_terminal_is_ours_kind (target_terminal_state::is_ours); |
472 | m_terminal_state = target_terminal_state::is_ours; | |
5842f62a PA |
473 | } |
474 | ||
223ffa71 | 475 | /* See target/target.h. */ |
5842f62a PA |
476 | |
477 | void | |
223ffa71 | 478 | target_terminal::ours_for_output () |
5842f62a | 479 | { |
215d3118 PA |
480 | struct ui *ui = current_ui; |
481 | ||
223ffa71 | 482 | /* See target_terminal::inferior. */ |
215d3118 PA |
483 | if (ui != main_ui) |
484 | return; | |
485 | ||
e671cd59 | 486 | if (!target_terminal::is_inferior ()) |
5842f62a | 487 | return; |
e671cd59 PA |
488 | |
489 | target_terminal_is_ours_kind (target_terminal_state::is_ours_for_output); | |
490 | target_terminal::m_terminal_state = target_terminal_state::is_ours_for_output; | |
d9d2d8b6 | 491 | } |
136d6dae | 492 | |
223ffa71 TT |
493 | /* See target/target.h. */ |
494 | ||
495 | void | |
496 | target_terminal::info (const char *arg, int from_tty) | |
497 | { | |
8b88a78e | 498 | current_top_target ()->terminal_info (arg, from_tty); |
223ffa71 TT |
499 | } |
500 | ||
b0ed115f TT |
501 | /* See target.h. */ |
502 | ||
20f0d60d | 503 | bool |
b0ed115f TT |
504 | target_supports_terminal_ours (void) |
505 | { | |
20f0d60d TT |
506 | /* This can be called before there is any target, so we must check |
507 | for nullptr here. */ | |
508 | target_ops *top = current_top_target (); | |
509 | ||
510 | if (top == nullptr) | |
511 | return false; | |
512 | return top->supports_terminal_ours (); | |
b0ed115f TT |
513 | } |
514 | ||
c906108c | 515 | static void |
fba45db2 | 516 | tcomplain (void) |
c906108c | 517 | { |
8a3fe4f8 | 518 | error (_("You can't do that when your target is `%s'"), |
8b88a78e | 519 | current_top_target ()->shortname ()); |
c906108c SS |
520 | } |
521 | ||
522 | void | |
fba45db2 | 523 | noprocess (void) |
c906108c | 524 | { |
8a3fe4f8 | 525 | error (_("You can't do that without a process to debug.")); |
c906108c SS |
526 | } |
527 | ||
c906108c | 528 | static void |
0a4f40a2 | 529 | default_terminal_info (struct target_ops *self, const char *args, int from_tty) |
c906108c | 530 | { |
a3f17187 | 531 | printf_unfiltered (_("No saved terminal information.\n")); |
c906108c SS |
532 | } |
533 | ||
0ef643c8 JB |
534 | /* A default implementation for the to_get_ada_task_ptid target method. |
535 | ||
536 | This function builds the PTID by using both LWP and TID as part of | |
537 | the PTID lwp and tid elements. The pid used is the pid of the | |
538 | inferior_ptid. */ | |
539 | ||
2c0b251b | 540 | static ptid_t |
1e6b91a4 | 541 | default_get_ada_task_ptid (struct target_ops *self, long lwp, long tid) |
0ef643c8 | 542 | { |
e99b03dc | 543 | return ptid_t (inferior_ptid.pid (), lwp, tid); |
0ef643c8 JB |
544 | } |
545 | ||
32231432 | 546 | static enum exec_direction_kind |
4c612759 | 547 | default_execution_direction (struct target_ops *self) |
32231432 PA |
548 | { |
549 | if (!target_can_execute_reverse) | |
550 | return EXEC_FORWARD; | |
551 | else if (!target_can_async_p ()) | |
552 | return EXEC_FORWARD; | |
553 | else | |
554 | gdb_assert_not_reached ("\ | |
555 | to_execution_direction must be implemented for reverse async"); | |
556 | } | |
557 | ||
a1740ee1 | 558 | /* See target.h. */ |
c906108c | 559 | |
b26a4dcb | 560 | void |
a1740ee1 | 561 | target_stack::push (target_ops *t) |
c906108c | 562 | { |
a1740ee1 | 563 | /* If there's already a target at this stratum, remove it. */ |
66b4deae PA |
564 | strata stratum = t->stratum (); |
565 | ||
566 | if (m_stack[stratum] != NULL) | |
c906108c | 567 | { |
66b4deae PA |
568 | target_ops *prev = m_stack[stratum]; |
569 | m_stack[stratum] = NULL; | |
a1740ee1 | 570 | target_close (prev); |
c906108c SS |
571 | } |
572 | ||
a1740ee1 | 573 | /* Now add the new one. */ |
66b4deae | 574 | m_stack[stratum] = t; |
5d502164 | 575 | |
66b4deae PA |
576 | if (m_top < stratum) |
577 | m_top = stratum; | |
a1740ee1 PA |
578 | } |
579 | ||
580 | /* See target.h. */ | |
c906108c | 581 | |
a1740ee1 PA |
582 | void |
583 | push_target (struct target_ops *t) | |
584 | { | |
585 | g_target_stack.push (t); | |
c906108c SS |
586 | } |
587 | ||
a1740ee1 | 588 | /* See target.h. */ |
c906108c SS |
589 | |
590 | int | |
fba45db2 | 591 | unpush_target (struct target_ops *t) |
a1740ee1 PA |
592 | { |
593 | return g_target_stack.unpush (t); | |
594 | } | |
595 | ||
596 | /* See target.h. */ | |
597 | ||
598 | bool | |
599 | target_stack::unpush (target_ops *t) | |
c906108c | 600 | { |
1688cb29 TT |
601 | gdb_assert (t != NULL); |
602 | ||
66b4deae PA |
603 | strata stratum = t->stratum (); |
604 | ||
605 | if (stratum == dummy_stratum) | |
c8d104ad | 606 | internal_error (__FILE__, __LINE__, |
9b20d036 | 607 | _("Attempt to unpush the dummy target")); |
c8d104ad | 608 | |
a1740ee1 PA |
609 | /* Look for the specified target. Note that a target can only occur |
610 | once in the target stack. */ | |
c906108c | 611 | |
66b4deae | 612 | if (m_stack[stratum] != t) |
258b763a | 613 | { |
a1740ee1 PA |
614 | /* If T wasn't pushed, quit. Only open targets should be |
615 | closed. */ | |
616 | return false; | |
258b763a | 617 | } |
c906108c | 618 | |
c378eb4e | 619 | /* Unchain the target. */ |
66b4deae | 620 | m_stack[stratum] = NULL; |
a1740ee1 | 621 | |
66b4deae PA |
622 | if (m_top == stratum) |
623 | m_top = t->beneath ()->stratum (); | |
c906108c | 624 | |
305436e0 PA |
625 | /* Finally close the target. Note we do this after unchaining, so |
626 | any target method calls from within the target_close | |
627 | implementation don't end up in T anymore. */ | |
460014f5 | 628 | target_close (t); |
305436e0 | 629 | |
a1740ee1 | 630 | return true; |
c906108c SS |
631 | } |
632 | ||
915ef8b1 PA |
633 | /* Unpush TARGET and assert that it worked. */ |
634 | ||
635 | static void | |
636 | unpush_target_and_assert (struct target_ops *target) | |
637 | { | |
638 | if (!unpush_target (target)) | |
639 | { | |
640 | fprintf_unfiltered (gdb_stderr, | |
641 | "pop_all_targets couldn't find target %s\n", | |
f6ac5f3d | 642 | target->shortname ()); |
915ef8b1 PA |
643 | internal_error (__FILE__, __LINE__, |
644 | _("failed internal consistency check")); | |
645 | } | |
646 | } | |
647 | ||
aa76d38d | 648 | void |
460014f5 | 649 | pop_all_targets_above (enum strata above_stratum) |
aa76d38d | 650 | { |
66b4deae | 651 | while ((int) (current_top_target ()->stratum ()) > (int) above_stratum) |
8b88a78e | 652 | unpush_target_and_assert (current_top_target ()); |
915ef8b1 PA |
653 | } |
654 | ||
655 | /* See target.h. */ | |
656 | ||
657 | void | |
658 | pop_all_targets_at_and_above (enum strata stratum) | |
659 | { | |
66b4deae | 660 | while ((int) (current_top_target ()->stratum ()) >= (int) stratum) |
8b88a78e | 661 | unpush_target_and_assert (current_top_target ()); |
aa76d38d PA |
662 | } |
663 | ||
87ab71f0 | 664 | void |
460014f5 | 665 | pop_all_targets (void) |
87ab71f0 | 666 | { |
460014f5 | 667 | pop_all_targets_above (dummy_stratum); |
87ab71f0 PA |
668 | } |
669 | ||
c0edd9ed JK |
670 | /* Return 1 if T is now pushed in the target stack. Return 0 otherwise. */ |
671 | ||
672 | int | |
673 | target_is_pushed (struct target_ops *t) | |
674 | { | |
a1740ee1 | 675 | return g_target_stack.is_pushed (t); |
c0edd9ed JK |
676 | } |
677 | ||
f0f9ff95 TT |
678 | /* Default implementation of to_get_thread_local_address. */ |
679 | ||
680 | static void | |
681 | generic_tls_error (void) | |
682 | { | |
683 | throw_error (TLS_GENERIC_ERROR, | |
684 | _("Cannot find thread-local variables on this target")); | |
685 | } | |
686 | ||
72f5cf0e | 687 | /* Using the objfile specified in OBJFILE, find the address for the |
9e35dae4 DJ |
688 | current thread's thread-local storage with offset OFFSET. */ |
689 | CORE_ADDR | |
690 | target_translate_tls_address (struct objfile *objfile, CORE_ADDR offset) | |
691 | { | |
692 | volatile CORE_ADDR addr = 0; | |
8b88a78e | 693 | struct target_ops *target = current_top_target (); |
9e35dae4 | 694 | |
f0f9ff95 | 695 | if (gdbarch_fetch_tls_load_module_address_p (target_gdbarch ())) |
9e35dae4 DJ |
696 | { |
697 | ptid_t ptid = inferior_ptid; | |
9e35dae4 | 698 | |
492d29ea | 699 | TRY |
9e35dae4 DJ |
700 | { |
701 | CORE_ADDR lm_addr; | |
702 | ||
703 | /* Fetch the load module address for this objfile. */ | |
f5656ead | 704 | lm_addr = gdbarch_fetch_tls_load_module_address (target_gdbarch (), |
9e35dae4 | 705 | objfile); |
9e35dae4 | 706 | |
f6ac5f3d | 707 | addr = target->get_thread_local_address (ptid, lm_addr, offset); |
9e35dae4 DJ |
708 | } |
709 | /* If an error occurred, print TLS related messages here. Otherwise, | |
710 | throw the error to some higher catcher. */ | |
492d29ea | 711 | CATCH (ex, RETURN_MASK_ALL) |
9e35dae4 DJ |
712 | { |
713 | int objfile_is_library = (objfile->flags & OBJF_SHARED); | |
714 | ||
715 | switch (ex.error) | |
716 | { | |
717 | case TLS_NO_LIBRARY_SUPPORT_ERROR: | |
3e43a32a MS |
718 | error (_("Cannot find thread-local variables " |
719 | "in this thread library.")); | |
9e35dae4 DJ |
720 | break; |
721 | case TLS_LOAD_MODULE_NOT_FOUND_ERROR: | |
722 | if (objfile_is_library) | |
723 | error (_("Cannot find shared library `%s' in dynamic" | |
4262abfb | 724 | " linker's load module list"), objfile_name (objfile)); |
9e35dae4 DJ |
725 | else |
726 | error (_("Cannot find executable file `%s' in dynamic" | |
4262abfb | 727 | " linker's load module list"), objfile_name (objfile)); |
9e35dae4 DJ |
728 | break; |
729 | case TLS_NOT_ALLOCATED_YET_ERROR: | |
730 | if (objfile_is_library) | |
731 | error (_("The inferior has not yet allocated storage for" | |
732 | " thread-local variables in\n" | |
733 | "the shared library `%s'\n" | |
734 | "for %s"), | |
4262abfb | 735 | objfile_name (objfile), target_pid_to_str (ptid)); |
9e35dae4 DJ |
736 | else |
737 | error (_("The inferior has not yet allocated storage for" | |
738 | " thread-local variables in\n" | |
739 | "the executable `%s'\n" | |
740 | "for %s"), | |
4262abfb | 741 | objfile_name (objfile), target_pid_to_str (ptid)); |
9e35dae4 DJ |
742 | break; |
743 | case TLS_GENERIC_ERROR: | |
744 | if (objfile_is_library) | |
745 | error (_("Cannot find thread-local storage for %s, " | |
746 | "shared library %s:\n%s"), | |
747 | target_pid_to_str (ptid), | |
4262abfb | 748 | objfile_name (objfile), ex.message); |
9e35dae4 DJ |
749 | else |
750 | error (_("Cannot find thread-local storage for %s, " | |
751 | "executable file %s:\n%s"), | |
752 | target_pid_to_str (ptid), | |
4262abfb | 753 | objfile_name (objfile), ex.message); |
9e35dae4 DJ |
754 | break; |
755 | default: | |
756 | throw_exception (ex); | |
757 | break; | |
758 | } | |
759 | } | |
492d29ea | 760 | END_CATCH |
9e35dae4 DJ |
761 | } |
762 | /* It wouldn't be wrong here to try a gdbarch method, too; finding | |
763 | TLS is an ABI-specific thing. But we don't do that yet. */ | |
764 | else | |
765 | error (_("Cannot find thread-local variables on this target")); | |
766 | ||
767 | return addr; | |
768 | } | |
769 | ||
6be7b56e | 770 | const char * |
01cb8804 | 771 | target_xfer_status_to_string (enum target_xfer_status status) |
6be7b56e PA |
772 | { |
773 | #define CASE(X) case X: return #X | |
01cb8804 | 774 | switch (status) |
6be7b56e PA |
775 | { |
776 | CASE(TARGET_XFER_E_IO); | |
bc113b4e | 777 | CASE(TARGET_XFER_UNAVAILABLE); |
6be7b56e PA |
778 | default: |
779 | return "<unknown>"; | |
780 | } | |
781 | #undef CASE | |
782 | }; | |
783 | ||
784 | ||
c906108c SS |
785 | #undef MIN |
786 | #define MIN(A, B) (((A) <= (B)) ? (A) : (B)) | |
787 | ||
788 | /* target_read_string -- read a null terminated string, up to LEN bytes, | |
789 | from MEMADDR in target. Set *ERRNOP to the errno code, or 0 if successful. | |
790 | Set *STRING to a pointer to malloc'd memory containing the data; the caller | |
791 | is responsible for freeing it. Return the number of bytes successfully | |
792 | read. */ | |
793 | ||
794 | int | |
e83e4e24 TT |
795 | target_read_string (CORE_ADDR memaddr, gdb::unique_xmalloc_ptr<char> *string, |
796 | int len, int *errnop) | |
c906108c | 797 | { |
c2e8b827 | 798 | int tlen, offset, i; |
1b0ba102 | 799 | gdb_byte buf[4]; |
c906108c SS |
800 | int errcode = 0; |
801 | char *buffer; | |
802 | int buffer_allocated; | |
803 | char *bufptr; | |
804 | unsigned int nbytes_read = 0; | |
805 | ||
6217bf3e MS |
806 | gdb_assert (string); |
807 | ||
c906108c SS |
808 | /* Small for testing. */ |
809 | buffer_allocated = 4; | |
224c3ddb | 810 | buffer = (char *) xmalloc (buffer_allocated); |
c906108c SS |
811 | bufptr = buffer; |
812 | ||
c906108c SS |
813 | while (len > 0) |
814 | { | |
815 | tlen = MIN (len, 4 - (memaddr & 3)); | |
816 | offset = memaddr & 3; | |
817 | ||
1b0ba102 | 818 | errcode = target_read_memory (memaddr & ~3, buf, sizeof buf); |
c906108c SS |
819 | if (errcode != 0) |
820 | { | |
821 | /* The transfer request might have crossed the boundary to an | |
c378eb4e | 822 | unallocated region of memory. Retry the transfer, requesting |
c906108c SS |
823 | a single byte. */ |
824 | tlen = 1; | |
825 | offset = 0; | |
b8eb5af0 | 826 | errcode = target_read_memory (memaddr, buf, 1); |
c906108c SS |
827 | if (errcode != 0) |
828 | goto done; | |
829 | } | |
830 | ||
831 | if (bufptr - buffer + tlen > buffer_allocated) | |
832 | { | |
833 | unsigned int bytes; | |
5d502164 | 834 | |
c906108c SS |
835 | bytes = bufptr - buffer; |
836 | buffer_allocated *= 2; | |
224c3ddb | 837 | buffer = (char *) xrealloc (buffer, buffer_allocated); |
c906108c SS |
838 | bufptr = buffer + bytes; |
839 | } | |
840 | ||
841 | for (i = 0; i < tlen; i++) | |
842 | { | |
843 | *bufptr++ = buf[i + offset]; | |
844 | if (buf[i + offset] == '\000') | |
845 | { | |
846 | nbytes_read += i + 1; | |
847 | goto done; | |
848 | } | |
849 | } | |
850 | ||
851 | memaddr += tlen; | |
852 | len -= tlen; | |
853 | nbytes_read += tlen; | |
854 | } | |
c5aa993b | 855 | done: |
e83e4e24 | 856 | string->reset (buffer); |
c906108c SS |
857 | if (errnop != NULL) |
858 | *errnop = errcode; | |
c906108c SS |
859 | return nbytes_read; |
860 | } | |
861 | ||
07b82ea5 PA |
862 | struct target_section_table * |
863 | target_get_section_table (struct target_ops *target) | |
864 | { | |
f6ac5f3d | 865 | return target->get_section_table (); |
07b82ea5 PA |
866 | } |
867 | ||
8db32d44 | 868 | /* Find a section containing ADDR. */ |
07b82ea5 | 869 | |
0542c86d | 870 | struct target_section * |
8db32d44 AC |
871 | target_section_by_addr (struct target_ops *target, CORE_ADDR addr) |
872 | { | |
07b82ea5 | 873 | struct target_section_table *table = target_get_section_table (target); |
0542c86d | 874 | struct target_section *secp; |
07b82ea5 PA |
875 | |
876 | if (table == NULL) | |
877 | return NULL; | |
878 | ||
879 | for (secp = table->sections; secp < table->sections_end; secp++) | |
8db32d44 AC |
880 | { |
881 | if (addr >= secp->addr && addr < secp->endaddr) | |
882 | return secp; | |
883 | } | |
884 | return NULL; | |
885 | } | |
886 | ||
0fec99e8 PA |
887 | |
888 | /* Helper for the memory xfer routines. Checks the attributes of the | |
889 | memory region of MEMADDR against the read or write being attempted. | |
890 | If the access is permitted returns true, otherwise returns false. | |
891 | REGION_P is an optional output parameter. If not-NULL, it is | |
892 | filled with a pointer to the memory region of MEMADDR. REG_LEN | |
893 | returns LEN trimmed to the end of the region. This is how much the | |
894 | caller can continue requesting, if the access is permitted. A | |
895 | single xfer request must not straddle memory region boundaries. */ | |
896 | ||
897 | static int | |
898 | memory_xfer_check_region (gdb_byte *readbuf, const gdb_byte *writebuf, | |
899 | ULONGEST memaddr, ULONGEST len, ULONGEST *reg_len, | |
900 | struct mem_region **region_p) | |
901 | { | |
902 | struct mem_region *region; | |
903 | ||
904 | region = lookup_mem_region (memaddr); | |
905 | ||
906 | if (region_p != NULL) | |
907 | *region_p = region; | |
908 | ||
909 | switch (region->attrib.mode) | |
910 | { | |
911 | case MEM_RO: | |
912 | if (writebuf != NULL) | |
913 | return 0; | |
914 | break; | |
915 | ||
916 | case MEM_WO: | |
917 | if (readbuf != NULL) | |
918 | return 0; | |
919 | break; | |
920 | ||
921 | case MEM_FLASH: | |
922 | /* We only support writing to flash during "load" for now. */ | |
923 | if (writebuf != NULL) | |
924 | error (_("Writing to flash memory forbidden in this context")); | |
925 | break; | |
926 | ||
927 | case MEM_NONE: | |
928 | return 0; | |
929 | } | |
930 | ||
931 | /* region->hi == 0 means there's no upper bound. */ | |
932 | if (memaddr + len < region->hi || region->hi == 0) | |
933 | *reg_len = len; | |
934 | else | |
935 | *reg_len = region->hi - memaddr; | |
936 | ||
937 | return 1; | |
938 | } | |
939 | ||
9f713294 YQ |
940 | /* Read memory from more than one valid target. A core file, for |
941 | instance, could have some of memory but delegate other bits to | |
942 | the target below it. So, we must manually try all targets. */ | |
943 | ||
cc9f16aa | 944 | enum target_xfer_status |
17fde6d0 | 945 | raw_memory_xfer_partial (struct target_ops *ops, gdb_byte *readbuf, |
9b409511 YQ |
946 | const gdb_byte *writebuf, ULONGEST memaddr, LONGEST len, |
947 | ULONGEST *xfered_len) | |
9f713294 | 948 | { |
9b409511 | 949 | enum target_xfer_status res; |
9f713294 YQ |
950 | |
951 | do | |
952 | { | |
f6ac5f3d PA |
953 | res = ops->xfer_partial (TARGET_OBJECT_MEMORY, NULL, |
954 | readbuf, writebuf, memaddr, len, | |
955 | xfered_len); | |
9b409511 | 956 | if (res == TARGET_XFER_OK) |
9f713294 YQ |
957 | break; |
958 | ||
633785ff | 959 | /* Stop if the target reports that the memory is not available. */ |
bc113b4e | 960 | if (res == TARGET_XFER_UNAVAILABLE) |
633785ff MM |
961 | break; |
962 | ||
9f713294 YQ |
963 | /* We want to continue past core files to executables, but not |
964 | past a running target's memory. */ | |
f6ac5f3d | 965 | if (ops->has_all_memory ()) |
9f713294 YQ |
966 | break; |
967 | ||
b6a8c27b | 968 | ops = ops->beneath (); |
9f713294 YQ |
969 | } |
970 | while (ops != NULL); | |
971 | ||
0f26cec1 PA |
972 | /* The cache works at the raw memory level. Make sure the cache |
973 | gets updated with raw contents no matter what kind of memory | |
974 | object was originally being written. Note we do write-through | |
975 | first, so that if it fails, we don't write to the cache contents | |
976 | that never made it to the target. */ | |
977 | if (writebuf != NULL | |
d7e15655 | 978 | && inferior_ptid != null_ptid |
0f26cec1 PA |
979 | && target_dcache_init_p () |
980 | && (stack_cache_enabled_p () || code_cache_enabled_p ())) | |
981 | { | |
982 | DCACHE *dcache = target_dcache_get (); | |
983 | ||
984 | /* Note that writing to an area of memory which wasn't present | |
985 | in the cache doesn't cause it to be loaded in. */ | |
986 | dcache_update (dcache, res, memaddr, writebuf, *xfered_len); | |
987 | } | |
988 | ||
9f713294 YQ |
989 | return res; |
990 | } | |
991 | ||
7f79c47e DE |
992 | /* Perform a partial memory transfer. |
993 | For docs see target.h, to_xfer_partial. */ | |
cf7a04e8 | 994 | |
9b409511 | 995 | static enum target_xfer_status |
f0ba3972 | 996 | memory_xfer_partial_1 (struct target_ops *ops, enum target_object object, |
17fde6d0 | 997 | gdb_byte *readbuf, const gdb_byte *writebuf, ULONGEST memaddr, |
9b409511 | 998 | ULONGEST len, ULONGEST *xfered_len) |
0779438d | 999 | { |
9b409511 | 1000 | enum target_xfer_status res; |
0fec99e8 | 1001 | ULONGEST reg_len; |
cf7a04e8 | 1002 | struct mem_region *region; |
4e5d721f | 1003 | struct inferior *inf; |
cf7a04e8 | 1004 | |
07b82ea5 PA |
1005 | /* For accesses to unmapped overlay sections, read directly from |
1006 | files. Must do this first, as MEMADDR may need adjustment. */ | |
1007 | if (readbuf != NULL && overlay_debugging) | |
1008 | { | |
1009 | struct obj_section *section = find_pc_overlay (memaddr); | |
5d502164 | 1010 | |
07b82ea5 PA |
1011 | if (pc_in_unmapped_range (memaddr, section)) |
1012 | { | |
1013 | struct target_section_table *table | |
1014 | = target_get_section_table (ops); | |
1015 | const char *section_name = section->the_bfd_section->name; | |
5d502164 | 1016 | |
07b82ea5 PA |
1017 | memaddr = overlay_mapped_address (memaddr, section); |
1018 | return section_table_xfer_memory_partial (readbuf, writebuf, | |
9b409511 | 1019 | memaddr, len, xfered_len, |
07b82ea5 PA |
1020 | table->sections, |
1021 | table->sections_end, | |
1022 | section_name); | |
1023 | } | |
1024 | } | |
1025 | ||
1026 | /* Try the executable files, if "trust-readonly-sections" is set. */ | |
cf7a04e8 DJ |
1027 | if (readbuf != NULL && trust_readonly) |
1028 | { | |
0542c86d | 1029 | struct target_section *secp; |
07b82ea5 | 1030 | struct target_section_table *table; |
cf7a04e8 DJ |
1031 | |
1032 | secp = target_section_by_addr (ops, memaddr); | |
1033 | if (secp != NULL | |
2b2848e2 DE |
1034 | && (bfd_get_section_flags (secp->the_bfd_section->owner, |
1035 | secp->the_bfd_section) | |
cf7a04e8 | 1036 | & SEC_READONLY)) |
07b82ea5 PA |
1037 | { |
1038 | table = target_get_section_table (ops); | |
1039 | return section_table_xfer_memory_partial (readbuf, writebuf, | |
9b409511 | 1040 | memaddr, len, xfered_len, |
07b82ea5 PA |
1041 | table->sections, |
1042 | table->sections_end, | |
1043 | NULL); | |
1044 | } | |
98646950 UW |
1045 | } |
1046 | ||
cf7a04e8 | 1047 | /* Try GDB's internal data cache. */ |
cf7a04e8 | 1048 | |
0fec99e8 PA |
1049 | if (!memory_xfer_check_region (readbuf, writebuf, memaddr, len, ®_len, |
1050 | ®ion)) | |
1051 | return TARGET_XFER_E_IO; | |
cf7a04e8 | 1052 | |
d7e15655 | 1053 | if (inferior_ptid != null_ptid) |
00431a78 | 1054 | inf = current_inferior (); |
6c95b8df PA |
1055 | else |
1056 | inf = NULL; | |
4e5d721f DE |
1057 | |
1058 | if (inf != NULL | |
0f26cec1 | 1059 | && readbuf != NULL |
2f4d8875 PA |
1060 | /* The dcache reads whole cache lines; that doesn't play well |
1061 | with reading from a trace buffer, because reading outside of | |
1062 | the collected memory range fails. */ | |
1063 | && get_traceframe_number () == -1 | |
4e5d721f | 1064 | && (region->attrib.cache |
29453a14 YQ |
1065 | || (stack_cache_enabled_p () && object == TARGET_OBJECT_STACK_MEMORY) |
1066 | || (code_cache_enabled_p () && object == TARGET_OBJECT_CODE_MEMORY))) | |
cf7a04e8 | 1067 | { |
2a2f9fe4 YQ |
1068 | DCACHE *dcache = target_dcache_get_or_init (); |
1069 | ||
0f26cec1 PA |
1070 | return dcache_read_memory_partial (ops, dcache, memaddr, readbuf, |
1071 | reg_len, xfered_len); | |
cf7a04e8 DJ |
1072 | } |
1073 | ||
1074 | /* If none of those methods found the memory we wanted, fall back | |
1075 | to a target partial transfer. Normally a single call to | |
1076 | to_xfer_partial is enough; if it doesn't recognize an object | |
1077 | it will call the to_xfer_partial of the next target down. | |
1078 | But for memory this won't do. Memory is the only target | |
9b409511 YQ |
1079 | object which can be read from more than one valid target. |
1080 | A core file, for instance, could have some of memory but | |
1081 | delegate other bits to the target below it. So, we must | |
1082 | manually try all targets. */ | |
1083 | ||
1084 | res = raw_memory_xfer_partial (ops, readbuf, writebuf, memaddr, reg_len, | |
1085 | xfered_len); | |
cf7a04e8 DJ |
1086 | |
1087 | /* If we still haven't got anything, return the last error. We | |
1088 | give up. */ | |
1089 | return res; | |
0779438d AC |
1090 | } |
1091 | ||
f0ba3972 PA |
1092 | /* Perform a partial memory transfer. For docs see target.h, |
1093 | to_xfer_partial. */ | |
1094 | ||
9b409511 | 1095 | static enum target_xfer_status |
f0ba3972 | 1096 | memory_xfer_partial (struct target_ops *ops, enum target_object object, |
9b409511 YQ |
1097 | gdb_byte *readbuf, const gdb_byte *writebuf, |
1098 | ULONGEST memaddr, ULONGEST len, ULONGEST *xfered_len) | |
f0ba3972 | 1099 | { |
9b409511 | 1100 | enum target_xfer_status res; |
f0ba3972 PA |
1101 | |
1102 | /* Zero length requests are ok and require no work. */ | |
1103 | if (len == 0) | |
9b409511 | 1104 | return TARGET_XFER_EOF; |
f0ba3972 | 1105 | |
a738ea1d YQ |
1106 | memaddr = address_significant (target_gdbarch (), memaddr); |
1107 | ||
f0ba3972 PA |
1108 | /* Fill in READBUF with breakpoint shadows, or WRITEBUF with |
1109 | breakpoint insns, thus hiding out from higher layers whether | |
1110 | there are software breakpoints inserted in the code stream. */ | |
1111 | if (readbuf != NULL) | |
1112 | { | |
9b409511 YQ |
1113 | res = memory_xfer_partial_1 (ops, object, readbuf, NULL, memaddr, len, |
1114 | xfered_len); | |
f0ba3972 | 1115 | |
9b409511 | 1116 | if (res == TARGET_XFER_OK && !show_memory_breakpoints) |
c63528fc | 1117 | breakpoint_xfer_memory (readbuf, NULL, NULL, memaddr, *xfered_len); |
f0ba3972 PA |
1118 | } |
1119 | else | |
1120 | { | |
67c059c2 AB |
1121 | /* A large write request is likely to be partially satisfied |
1122 | by memory_xfer_partial_1. We will continually malloc | |
1123 | and free a copy of the entire write request for breakpoint | |
1124 | shadow handling even though we only end up writing a small | |
09c98b44 DB |
1125 | subset of it. Cap writes to a limit specified by the target |
1126 | to mitigate this. */ | |
f6ac5f3d | 1127 | len = std::min (ops->get_memory_xfer_limit (), len); |
67c059c2 | 1128 | |
26fcd5d7 TT |
1129 | gdb::byte_vector buf (writebuf, writebuf + len); |
1130 | breakpoint_xfer_memory (NULL, buf.data (), writebuf, memaddr, len); | |
1131 | res = memory_xfer_partial_1 (ops, object, NULL, buf.data (), memaddr, len, | |
9b409511 | 1132 | xfered_len); |
f0ba3972 PA |
1133 | } |
1134 | ||
1135 | return res; | |
1136 | } | |
1137 | ||
cb85b21b TT |
1138 | scoped_restore_tmpl<int> |
1139 | make_scoped_restore_show_memory_breakpoints (int show) | |
8defab1a | 1140 | { |
cb85b21b | 1141 | return make_scoped_restore (&show_memory_breakpoints, show); |
8defab1a DJ |
1142 | } |
1143 | ||
7f79c47e DE |
1144 | /* For docs see target.h, to_xfer_partial. */ |
1145 | ||
9b409511 | 1146 | enum target_xfer_status |
27394598 AC |
1147 | target_xfer_partial (struct target_ops *ops, |
1148 | enum target_object object, const char *annex, | |
4ac248ca | 1149 | gdb_byte *readbuf, const gdb_byte *writebuf, |
9b409511 YQ |
1150 | ULONGEST offset, ULONGEST len, |
1151 | ULONGEST *xfered_len) | |
27394598 | 1152 | { |
9b409511 | 1153 | enum target_xfer_status retval; |
27394598 | 1154 | |
ce6d0892 YQ |
1155 | /* Transfer is done when LEN is zero. */ |
1156 | if (len == 0) | |
9b409511 | 1157 | return TARGET_XFER_EOF; |
ce6d0892 | 1158 | |
d914c394 SS |
1159 | if (writebuf && !may_write_memory) |
1160 | error (_("Writing to memory is not allowed (addr %s, len %s)"), | |
1161 | core_addr_to_string_nz (offset), plongest (len)); | |
1162 | ||
9b409511 YQ |
1163 | *xfered_len = 0; |
1164 | ||
cf7a04e8 DJ |
1165 | /* If this is a memory transfer, let the memory-specific code |
1166 | have a look at it instead. Memory transfers are more | |
1167 | complicated. */ | |
29453a14 YQ |
1168 | if (object == TARGET_OBJECT_MEMORY || object == TARGET_OBJECT_STACK_MEMORY |
1169 | || object == TARGET_OBJECT_CODE_MEMORY) | |
4e5d721f | 1170 | retval = memory_xfer_partial (ops, object, readbuf, |
9b409511 | 1171 | writebuf, offset, len, xfered_len); |
9f713294 | 1172 | else if (object == TARGET_OBJECT_RAW_MEMORY) |
cf7a04e8 | 1173 | { |
0fec99e8 PA |
1174 | /* Skip/avoid accessing the target if the memory region |
1175 | attributes block the access. Check this here instead of in | |
1176 | raw_memory_xfer_partial as otherwise we'd end up checking | |
1177 | this twice in the case of the memory_xfer_partial path is | |
1178 | taken; once before checking the dcache, and another in the | |
1179 | tail call to raw_memory_xfer_partial. */ | |
1180 | if (!memory_xfer_check_region (readbuf, writebuf, offset, len, &len, | |
1181 | NULL)) | |
1182 | return TARGET_XFER_E_IO; | |
1183 | ||
9f713294 | 1184 | /* Request the normal memory object from other layers. */ |
9b409511 YQ |
1185 | retval = raw_memory_xfer_partial (ops, readbuf, writebuf, offset, len, |
1186 | xfered_len); | |
cf7a04e8 | 1187 | } |
9f713294 | 1188 | else |
f6ac5f3d PA |
1189 | retval = ops->xfer_partial (object, annex, readbuf, |
1190 | writebuf, offset, len, xfered_len); | |
cf7a04e8 | 1191 | |
27394598 AC |
1192 | if (targetdebug) |
1193 | { | |
1194 | const unsigned char *myaddr = NULL; | |
1195 | ||
1196 | fprintf_unfiltered (gdb_stdlog, | |
3e43a32a | 1197 | "%s:target_xfer_partial " |
9b409511 | 1198 | "(%d, %s, %s, %s, %s, %s) = %d, %s", |
f6ac5f3d | 1199 | ops->shortname (), |
27394598 AC |
1200 | (int) object, |
1201 | (annex ? annex : "(null)"), | |
53b71562 JB |
1202 | host_address_to_string (readbuf), |
1203 | host_address_to_string (writebuf), | |
0b1553bc | 1204 | core_addr_to_string_nz (offset), |
9b409511 YQ |
1205 | pulongest (len), retval, |
1206 | pulongest (*xfered_len)); | |
27394598 AC |
1207 | |
1208 | if (readbuf) | |
1209 | myaddr = readbuf; | |
1210 | if (writebuf) | |
1211 | myaddr = writebuf; | |
9b409511 | 1212 | if (retval == TARGET_XFER_OK && myaddr != NULL) |
27394598 AC |
1213 | { |
1214 | int i; | |
2bc416ba | 1215 | |
27394598 | 1216 | fputs_unfiltered (", bytes =", gdb_stdlog); |
9b409511 | 1217 | for (i = 0; i < *xfered_len; i++) |
27394598 | 1218 | { |
53b71562 | 1219 | if ((((intptr_t) &(myaddr[i])) & 0xf) == 0) |
27394598 AC |
1220 | { |
1221 | if (targetdebug < 2 && i > 0) | |
1222 | { | |
1223 | fprintf_unfiltered (gdb_stdlog, " ..."); | |
1224 | break; | |
1225 | } | |
1226 | fprintf_unfiltered (gdb_stdlog, "\n"); | |
1227 | } | |
2bc416ba | 1228 | |
27394598 AC |
1229 | fprintf_unfiltered (gdb_stdlog, " %02x", myaddr[i] & 0xff); |
1230 | } | |
1231 | } | |
2bc416ba | 1232 | |
27394598 AC |
1233 | fputc_unfiltered ('\n', gdb_stdlog); |
1234 | } | |
9b409511 YQ |
1235 | |
1236 | /* Check implementations of to_xfer_partial update *XFERED_LEN | |
1237 | properly. Do assertion after printing debug messages, so that we | |
1238 | can find more clues on assertion failure from debugging messages. */ | |
bc113b4e | 1239 | if (retval == TARGET_XFER_OK || retval == TARGET_XFER_UNAVAILABLE) |
9b409511 YQ |
1240 | gdb_assert (*xfered_len > 0); |
1241 | ||
27394598 AC |
1242 | return retval; |
1243 | } | |
1244 | ||
578d3588 PA |
1245 | /* Read LEN bytes of target memory at address MEMADDR, placing the |
1246 | results in GDB's memory at MYADDR. Returns either 0 for success or | |
d09f2c3f | 1247 | -1 if any error occurs. |
c906108c SS |
1248 | |
1249 | If an error occurs, no guarantee is made about the contents of the data at | |
1250 | MYADDR. In particular, the caller should not depend upon partial reads | |
1251 | filling the buffer with good data. There is no way for the caller to know | |
1252 | how much good data might have been transfered anyway. Callers that can | |
cf7a04e8 | 1253 | deal with partial reads should call target_read (which will retry until |
c378eb4e | 1254 | it makes no progress, and then return how much was transferred). */ |
c906108c SS |
1255 | |
1256 | int | |
1b162304 | 1257 | target_read_memory (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len) |
c906108c | 1258 | { |
8b88a78e | 1259 | if (target_read (current_top_target (), TARGET_OBJECT_MEMORY, NULL, |
cf7a04e8 DJ |
1260 | myaddr, memaddr, len) == len) |
1261 | return 0; | |
0779438d | 1262 | else |
d09f2c3f | 1263 | return -1; |
c906108c SS |
1264 | } |
1265 | ||
721ec300 GB |
1266 | /* See target/target.h. */ |
1267 | ||
1268 | int | |
1269 | target_read_uint32 (CORE_ADDR memaddr, uint32_t *result) | |
1270 | { | |
1271 | gdb_byte buf[4]; | |
1272 | int r; | |
1273 | ||
1274 | r = target_read_memory (memaddr, buf, sizeof buf); | |
1275 | if (r != 0) | |
1276 | return r; | |
1277 | *result = extract_unsigned_integer (buf, sizeof buf, | |
1278 | gdbarch_byte_order (target_gdbarch ())); | |
1279 | return 0; | |
1280 | } | |
1281 | ||
aee4bf85 PA |
1282 | /* Like target_read_memory, but specify explicitly that this is a read |
1283 | from the target's raw memory. That is, this read bypasses the | |
1284 | dcache, breakpoint shadowing, etc. */ | |
1285 | ||
1286 | int | |
1287 | target_read_raw_memory (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len) | |
1288 | { | |
8b88a78e | 1289 | if (target_read (current_top_target (), TARGET_OBJECT_RAW_MEMORY, NULL, |
aee4bf85 PA |
1290 | myaddr, memaddr, len) == len) |
1291 | return 0; | |
1292 | else | |
d09f2c3f | 1293 | return -1; |
aee4bf85 PA |
1294 | } |
1295 | ||
4e5d721f DE |
1296 | /* Like target_read_memory, but specify explicitly that this is a read from |
1297 | the target's stack. This may trigger different cache behavior. */ | |
1298 | ||
1299 | int | |
45aa4659 | 1300 | target_read_stack (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len) |
4e5d721f | 1301 | { |
8b88a78e | 1302 | if (target_read (current_top_target (), TARGET_OBJECT_STACK_MEMORY, NULL, |
4e5d721f DE |
1303 | myaddr, memaddr, len) == len) |
1304 | return 0; | |
1305 | else | |
d09f2c3f | 1306 | return -1; |
4e5d721f DE |
1307 | } |
1308 | ||
29453a14 YQ |
1309 | /* Like target_read_memory, but specify explicitly that this is a read from |
1310 | the target's code. This may trigger different cache behavior. */ | |
1311 | ||
1312 | int | |
1313 | target_read_code (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len) | |
1314 | { | |
8b88a78e | 1315 | if (target_read (current_top_target (), TARGET_OBJECT_CODE_MEMORY, NULL, |
29453a14 YQ |
1316 | myaddr, memaddr, len) == len) |
1317 | return 0; | |
1318 | else | |
d09f2c3f | 1319 | return -1; |
29453a14 YQ |
1320 | } |
1321 | ||
7f79c47e | 1322 | /* Write LEN bytes from MYADDR to target memory at address MEMADDR. |
d09f2c3f PA |
1323 | Returns either 0 for success or -1 if any error occurs. If an |
1324 | error occurs, no guarantee is made about how much data got written. | |
1325 | Callers that can deal with partial writes should call | |
1326 | target_write. */ | |
7f79c47e | 1327 | |
c906108c | 1328 | int |
45aa4659 | 1329 | target_write_memory (CORE_ADDR memaddr, const gdb_byte *myaddr, ssize_t len) |
c906108c | 1330 | { |
8b88a78e | 1331 | if (target_write (current_top_target (), TARGET_OBJECT_MEMORY, NULL, |
cf7a04e8 DJ |
1332 | myaddr, memaddr, len) == len) |
1333 | return 0; | |
0779438d | 1334 | else |
d09f2c3f | 1335 | return -1; |
c906108c | 1336 | } |
c5aa993b | 1337 | |
f0ba3972 | 1338 | /* Write LEN bytes from MYADDR to target raw memory at address |
d09f2c3f PA |
1339 | MEMADDR. Returns either 0 for success or -1 if any error occurs. |
1340 | If an error occurs, no guarantee is made about how much data got | |
1341 | written. Callers that can deal with partial writes should call | |
1342 | target_write. */ | |
f0ba3972 PA |
1343 | |
1344 | int | |
45aa4659 | 1345 | target_write_raw_memory (CORE_ADDR memaddr, const gdb_byte *myaddr, ssize_t len) |
f0ba3972 | 1346 | { |
8b88a78e | 1347 | if (target_write (current_top_target (), TARGET_OBJECT_RAW_MEMORY, NULL, |
f0ba3972 PA |
1348 | myaddr, memaddr, len) == len) |
1349 | return 0; | |
1350 | else | |
d09f2c3f | 1351 | return -1; |
f0ba3972 PA |
1352 | } |
1353 | ||
fd79ecee DJ |
1354 | /* Fetch the target's memory map. */ |
1355 | ||
a664f67e | 1356 | std::vector<mem_region> |
fd79ecee DJ |
1357 | target_memory_map (void) |
1358 | { | |
8b88a78e | 1359 | std::vector<mem_region> result = current_top_target ()->memory_map (); |
a664f67e SM |
1360 | if (result.empty ()) |
1361 | return result; | |
fd79ecee | 1362 | |
a664f67e | 1363 | std::sort (result.begin (), result.end ()); |
fd79ecee DJ |
1364 | |
1365 | /* Check that regions do not overlap. Simultaneously assign | |
1366 | a numbering for the "mem" commands to use to refer to | |
1367 | each region. */ | |
a664f67e SM |
1368 | mem_region *last_one = NULL; |
1369 | for (size_t ix = 0; ix < result.size (); ix++) | |
fd79ecee | 1370 | { |
a664f67e | 1371 | mem_region *this_one = &result[ix]; |
fd79ecee DJ |
1372 | this_one->number = ix; |
1373 | ||
a664f67e | 1374 | if (last_one != NULL && last_one->hi > this_one->lo) |
fd79ecee DJ |
1375 | { |
1376 | warning (_("Overlapping regions in memory map: ignoring")); | |
a664f67e | 1377 | return std::vector<mem_region> (); |
fd79ecee | 1378 | } |
a664f67e | 1379 | |
fd79ecee DJ |
1380 | last_one = this_one; |
1381 | } | |
1382 | ||
1383 | return result; | |
1384 | } | |
1385 | ||
a76d924d DJ |
1386 | void |
1387 | target_flash_erase (ULONGEST address, LONGEST length) | |
1388 | { | |
8b88a78e | 1389 | current_top_target ()->flash_erase (address, length); |
a76d924d DJ |
1390 | } |
1391 | ||
1392 | void | |
1393 | target_flash_done (void) | |
1394 | { | |
8b88a78e | 1395 | current_top_target ()->flash_done (); |
a76d924d DJ |
1396 | } |
1397 | ||
920d2a44 AC |
1398 | static void |
1399 | show_trust_readonly (struct ui_file *file, int from_tty, | |
1400 | struct cmd_list_element *c, const char *value) | |
1401 | { | |
3e43a32a MS |
1402 | fprintf_filtered (file, |
1403 | _("Mode for reading from readonly sections is %s.\n"), | |
920d2a44 AC |
1404 | value); |
1405 | } | |
3a11626d | 1406 | |
7f79c47e | 1407 | /* Target vector read/write partial wrapper functions. */ |
0088c768 | 1408 | |
9b409511 | 1409 | static enum target_xfer_status |
1e3ff5ad AC |
1410 | target_read_partial (struct target_ops *ops, |
1411 | enum target_object object, | |
1b0ba102 | 1412 | const char *annex, gdb_byte *buf, |
9b409511 YQ |
1413 | ULONGEST offset, ULONGEST len, |
1414 | ULONGEST *xfered_len) | |
1e3ff5ad | 1415 | { |
9b409511 YQ |
1416 | return target_xfer_partial (ops, object, annex, buf, NULL, offset, len, |
1417 | xfered_len); | |
1e3ff5ad AC |
1418 | } |
1419 | ||
8a55ffb0 | 1420 | static enum target_xfer_status |
1e3ff5ad AC |
1421 | target_write_partial (struct target_ops *ops, |
1422 | enum target_object object, | |
1b0ba102 | 1423 | const char *annex, const gdb_byte *buf, |
9b409511 | 1424 | ULONGEST offset, LONGEST len, ULONGEST *xfered_len) |
1e3ff5ad | 1425 | { |
9b409511 YQ |
1426 | return target_xfer_partial (ops, object, annex, NULL, buf, offset, len, |
1427 | xfered_len); | |
1e3ff5ad AC |
1428 | } |
1429 | ||
1430 | /* Wrappers to perform the full transfer. */ | |
7f79c47e DE |
1431 | |
1432 | /* For docs on target_read see target.h. */ | |
1433 | ||
1e3ff5ad AC |
1434 | LONGEST |
1435 | target_read (struct target_ops *ops, | |
1436 | enum target_object object, | |
1b0ba102 | 1437 | const char *annex, gdb_byte *buf, |
1e3ff5ad AC |
1438 | ULONGEST offset, LONGEST len) |
1439 | { | |
279a6fed | 1440 | LONGEST xfered_total = 0; |
d309493c SM |
1441 | int unit_size = 1; |
1442 | ||
1443 | /* If we are reading from a memory object, find the length of an addressable | |
1444 | unit for that architecture. */ | |
1445 | if (object == TARGET_OBJECT_MEMORY | |
1446 | || object == TARGET_OBJECT_STACK_MEMORY | |
1447 | || object == TARGET_OBJECT_CODE_MEMORY | |
1448 | || object == TARGET_OBJECT_RAW_MEMORY) | |
1449 | unit_size = gdbarch_addressable_memory_unit_size (target_gdbarch ()); | |
5d502164 | 1450 | |
279a6fed | 1451 | while (xfered_total < len) |
1e3ff5ad | 1452 | { |
279a6fed | 1453 | ULONGEST xfered_partial; |
9b409511 YQ |
1454 | enum target_xfer_status status; |
1455 | ||
1456 | status = target_read_partial (ops, object, annex, | |
d309493c | 1457 | buf + xfered_total * unit_size, |
279a6fed SM |
1458 | offset + xfered_total, len - xfered_total, |
1459 | &xfered_partial); | |
5d502164 | 1460 | |
1e3ff5ad | 1461 | /* Call an observer, notifying them of the xfer progress? */ |
9b409511 | 1462 | if (status == TARGET_XFER_EOF) |
279a6fed | 1463 | return xfered_total; |
9b409511 YQ |
1464 | else if (status == TARGET_XFER_OK) |
1465 | { | |
279a6fed | 1466 | xfered_total += xfered_partial; |
9b409511 YQ |
1467 | QUIT; |
1468 | } | |
1469 | else | |
279a6fed | 1470 | return TARGET_XFER_E_IO; |
9b409511 | 1471 | |
1e3ff5ad AC |
1472 | } |
1473 | return len; | |
1474 | } | |
1475 | ||
f1a507a1 JB |
1476 | /* Assuming that the entire [begin, end) range of memory cannot be |
1477 | read, try to read whatever subrange is possible to read. | |
1478 | ||
1479 | The function returns, in RESULT, either zero or one memory block. | |
1480 | If there's a readable subrange at the beginning, it is completely | |
1481 | read and returned. Any further readable subrange will not be read. | |
1482 | Otherwise, if there's a readable subrange at the end, it will be | |
1483 | completely read and returned. Any readable subranges before it | |
1484 | (obviously, not starting at the beginning), will be ignored. In | |
1485 | other cases -- either no readable subrange, or readable subrange(s) | |
1486 | that is neither at the beginning, or end, nothing is returned. | |
1487 | ||
1488 | The purpose of this function is to handle a read across a boundary | |
1489 | of accessible memory in a case when memory map is not available. | |
1490 | The above restrictions are fine for this case, but will give | |
1491 | incorrect results if the memory is 'patchy'. However, supporting | |
1492 | 'patchy' memory would require trying to read every single byte, | |
1493 | and it seems unacceptable solution. Explicit memory map is | |
1494 | recommended for this case -- and target_read_memory_robust will | |
1495 | take care of reading multiple ranges then. */ | |
8dedea02 VP |
1496 | |
1497 | static void | |
3e43a32a | 1498 | read_whatever_is_readable (struct target_ops *ops, |
279a6fed | 1499 | const ULONGEST begin, const ULONGEST end, |
d309493c | 1500 | int unit_size, |
386c8614 | 1501 | std::vector<memory_read_result> *result) |
d5086790 | 1502 | { |
8dedea02 VP |
1503 | ULONGEST current_begin = begin; |
1504 | ULONGEST current_end = end; | |
1505 | int forward; | |
9b409511 | 1506 | ULONGEST xfered_len; |
8dedea02 VP |
1507 | |
1508 | /* If we previously failed to read 1 byte, nothing can be done here. */ | |
1509 | if (end - begin <= 1) | |
386c8614 TT |
1510 | return; |
1511 | ||
1512 | gdb::unique_xmalloc_ptr<gdb_byte> buf ((gdb_byte *) xmalloc (end - begin)); | |
8dedea02 VP |
1513 | |
1514 | /* Check that either first or the last byte is readable, and give up | |
c378eb4e | 1515 | if not. This heuristic is meant to permit reading accessible memory |
8dedea02 VP |
1516 | at the boundary of accessible region. */ |
1517 | if (target_read_partial (ops, TARGET_OBJECT_MEMORY, NULL, | |
386c8614 | 1518 | buf.get (), begin, 1, &xfered_len) == TARGET_XFER_OK) |
8dedea02 VP |
1519 | { |
1520 | forward = 1; | |
1521 | ++current_begin; | |
1522 | } | |
1523 | else if (target_read_partial (ops, TARGET_OBJECT_MEMORY, NULL, | |
386c8614 | 1524 | buf.get () + (end - begin) - 1, end - 1, 1, |
9b409511 | 1525 | &xfered_len) == TARGET_XFER_OK) |
8dedea02 VP |
1526 | { |
1527 | forward = 0; | |
1528 | --current_end; | |
1529 | } | |
1530 | else | |
386c8614 | 1531 | return; |
8dedea02 VP |
1532 | |
1533 | /* Loop invariant is that the [current_begin, current_end) was previously | |
1534 | found to be not readable as a whole. | |
1535 | ||
1536 | Note loop condition -- if the range has 1 byte, we can't divide the range | |
1537 | so there's no point trying further. */ | |
1538 | while (current_end - current_begin > 1) | |
1539 | { | |
1540 | ULONGEST first_half_begin, first_half_end; | |
1541 | ULONGEST second_half_begin, second_half_end; | |
1542 | LONGEST xfer; | |
279a6fed | 1543 | ULONGEST middle = current_begin + (current_end - current_begin) / 2; |
f1a507a1 | 1544 | |
8dedea02 VP |
1545 | if (forward) |
1546 | { | |
1547 | first_half_begin = current_begin; | |
1548 | first_half_end = middle; | |
1549 | second_half_begin = middle; | |
1550 | second_half_end = current_end; | |
1551 | } | |
1552 | else | |
1553 | { | |
1554 | first_half_begin = middle; | |
1555 | first_half_end = current_end; | |
1556 | second_half_begin = current_begin; | |
1557 | second_half_end = middle; | |
1558 | } | |
1559 | ||
1560 | xfer = target_read (ops, TARGET_OBJECT_MEMORY, NULL, | |
386c8614 | 1561 | buf.get () + (first_half_begin - begin) * unit_size, |
8dedea02 VP |
1562 | first_half_begin, |
1563 | first_half_end - first_half_begin); | |
1564 | ||
1565 | if (xfer == first_half_end - first_half_begin) | |
1566 | { | |
c378eb4e | 1567 | /* This half reads up fine. So, the error must be in the |
3e43a32a | 1568 | other half. */ |
8dedea02 VP |
1569 | current_begin = second_half_begin; |
1570 | current_end = second_half_end; | |
1571 | } | |
1572 | else | |
1573 | { | |
c378eb4e | 1574 | /* This half is not readable. Because we've tried one byte, we |
279a6fed | 1575 | know some part of this half if actually readable. Go to the next |
8dedea02 VP |
1576 | iteration to divide again and try to read. |
1577 | ||
1578 | We don't handle the other half, because this function only tries | |
1579 | to read a single readable subrange. */ | |
1580 | current_begin = first_half_begin; | |
1581 | current_end = first_half_end; | |
1582 | } | |
1583 | } | |
1584 | ||
1585 | if (forward) | |
1586 | { | |
1587 | /* The [begin, current_begin) range has been read. */ | |
386c8614 | 1588 | result->emplace_back (begin, current_end, std::move (buf)); |
8dedea02 VP |
1589 | } |
1590 | else | |
1591 | { | |
1592 | /* The [current_end, end) range has been read. */ | |
279a6fed | 1593 | LONGEST region_len = end - current_end; |
f1a507a1 | 1594 | |
386c8614 TT |
1595 | gdb::unique_xmalloc_ptr<gdb_byte> data |
1596 | ((gdb_byte *) xmalloc (region_len * unit_size)); | |
1597 | memcpy (data.get (), buf.get () + (current_end - begin) * unit_size, | |
d309493c | 1598 | region_len * unit_size); |
386c8614 | 1599 | result->emplace_back (current_end, end, std::move (data)); |
8dedea02 | 1600 | } |
8dedea02 VP |
1601 | } |
1602 | ||
386c8614 | 1603 | std::vector<memory_read_result> |
279a6fed SM |
1604 | read_memory_robust (struct target_ops *ops, |
1605 | const ULONGEST offset, const LONGEST len) | |
8dedea02 | 1606 | { |
386c8614 | 1607 | std::vector<memory_read_result> result; |
d309493c | 1608 | int unit_size = gdbarch_addressable_memory_unit_size (target_gdbarch ()); |
8dedea02 | 1609 | |
279a6fed SM |
1610 | LONGEST xfered_total = 0; |
1611 | while (xfered_total < len) | |
d5086790 | 1612 | { |
279a6fed SM |
1613 | struct mem_region *region = lookup_mem_region (offset + xfered_total); |
1614 | LONGEST region_len; | |
5d502164 | 1615 | |
8dedea02 VP |
1616 | /* If there is no explicit region, a fake one should be created. */ |
1617 | gdb_assert (region); | |
1618 | ||
1619 | if (region->hi == 0) | |
279a6fed | 1620 | region_len = len - xfered_total; |
8dedea02 | 1621 | else |
279a6fed | 1622 | region_len = region->hi - offset; |
8dedea02 VP |
1623 | |
1624 | if (region->attrib.mode == MEM_NONE || region->attrib.mode == MEM_WO) | |
d5086790 | 1625 | { |
c378eb4e | 1626 | /* Cannot read this region. Note that we can end up here only |
8dedea02 VP |
1627 | if the region is explicitly marked inaccessible, or |
1628 | 'inaccessible-by-default' is in effect. */ | |
279a6fed | 1629 | xfered_total += region_len; |
8dedea02 VP |
1630 | } |
1631 | else | |
1632 | { | |
325fac50 | 1633 | LONGEST to_read = std::min (len - xfered_total, region_len); |
386c8614 TT |
1634 | gdb::unique_xmalloc_ptr<gdb_byte> buffer |
1635 | ((gdb_byte *) xmalloc (to_read * unit_size)); | |
8dedea02 | 1636 | |
279a6fed | 1637 | LONGEST xfered_partial = |
386c8614 | 1638 | target_read (ops, TARGET_OBJECT_MEMORY, NULL, buffer.get (), |
279a6fed | 1639 | offset + xfered_total, to_read); |
8dedea02 | 1640 | /* Call an observer, notifying them of the xfer progress? */ |
279a6fed | 1641 | if (xfered_partial <= 0) |
d5086790 | 1642 | { |
c378eb4e | 1643 | /* Got an error reading full chunk. See if maybe we can read |
8dedea02 | 1644 | some subrange. */ |
e084c964 DB |
1645 | read_whatever_is_readable (ops, offset + xfered_total, |
1646 | offset + xfered_total + to_read, | |
1647 | unit_size, &result); | |
279a6fed | 1648 | xfered_total += to_read; |
d5086790 | 1649 | } |
8dedea02 VP |
1650 | else |
1651 | { | |
386c8614 TT |
1652 | result.emplace_back (offset + xfered_total, |
1653 | offset + xfered_total + xfered_partial, | |
1654 | std::move (buffer)); | |
279a6fed | 1655 | xfered_total += xfered_partial; |
8dedea02 VP |
1656 | } |
1657 | QUIT; | |
d5086790 | 1658 | } |
d5086790 | 1659 | } |
9d78f827 | 1660 | |
8dedea02 | 1661 | return result; |
d5086790 VP |
1662 | } |
1663 | ||
8dedea02 | 1664 | |
cf7a04e8 DJ |
1665 | /* An alternative to target_write with progress callbacks. */ |
1666 | ||
1e3ff5ad | 1667 | LONGEST |
cf7a04e8 DJ |
1668 | target_write_with_progress (struct target_ops *ops, |
1669 | enum target_object object, | |
1670 | const char *annex, const gdb_byte *buf, | |
1671 | ULONGEST offset, LONGEST len, | |
1672 | void (*progress) (ULONGEST, void *), void *baton) | |
1e3ff5ad | 1673 | { |
279a6fed | 1674 | LONGEST xfered_total = 0; |
d309493c SM |
1675 | int unit_size = 1; |
1676 | ||
1677 | /* If we are writing to a memory object, find the length of an addressable | |
1678 | unit for that architecture. */ | |
1679 | if (object == TARGET_OBJECT_MEMORY | |
1680 | || object == TARGET_OBJECT_STACK_MEMORY | |
1681 | || object == TARGET_OBJECT_CODE_MEMORY | |
1682 | || object == TARGET_OBJECT_RAW_MEMORY) | |
1683 | unit_size = gdbarch_addressable_memory_unit_size (target_gdbarch ()); | |
a76d924d DJ |
1684 | |
1685 | /* Give the progress callback a chance to set up. */ | |
1686 | if (progress) | |
1687 | (*progress) (0, baton); | |
1688 | ||
279a6fed | 1689 | while (xfered_total < len) |
1e3ff5ad | 1690 | { |
279a6fed | 1691 | ULONGEST xfered_partial; |
9b409511 YQ |
1692 | enum target_xfer_status status; |
1693 | ||
1694 | status = target_write_partial (ops, object, annex, | |
d309493c | 1695 | buf + xfered_total * unit_size, |
279a6fed SM |
1696 | offset + xfered_total, len - xfered_total, |
1697 | &xfered_partial); | |
cf7a04e8 | 1698 | |
5c328c05 | 1699 | if (status != TARGET_XFER_OK) |
279a6fed | 1700 | return status == TARGET_XFER_EOF ? xfered_total : TARGET_XFER_E_IO; |
cf7a04e8 DJ |
1701 | |
1702 | if (progress) | |
279a6fed | 1703 | (*progress) (xfered_partial, baton); |
cf7a04e8 | 1704 | |
279a6fed | 1705 | xfered_total += xfered_partial; |
1e3ff5ad AC |
1706 | QUIT; |
1707 | } | |
1708 | return len; | |
1709 | } | |
1710 | ||
7f79c47e DE |
1711 | /* For docs on target_write see target.h. */ |
1712 | ||
cf7a04e8 DJ |
1713 | LONGEST |
1714 | target_write (struct target_ops *ops, | |
1715 | enum target_object object, | |
1716 | const char *annex, const gdb_byte *buf, | |
1717 | ULONGEST offset, LONGEST len) | |
1718 | { | |
1719 | return target_write_with_progress (ops, object, annex, buf, offset, len, | |
1720 | NULL, NULL); | |
1721 | } | |
1722 | ||
9018be22 SM |
1723 | /* Help for target_read_alloc and target_read_stralloc. See their comments |
1724 | for details. */ | |
13547ab6 | 1725 | |
9018be22 SM |
1726 | template <typename T> |
1727 | gdb::optional<gdb::def_vector<T>> | |
159f81f3 | 1728 | target_read_alloc_1 (struct target_ops *ops, enum target_object object, |
9018be22 | 1729 | const char *annex) |
13547ab6 | 1730 | { |
9018be22 SM |
1731 | gdb::def_vector<T> buf; |
1732 | size_t buf_pos = 0; | |
1733 | const int chunk = 4096; | |
13547ab6 DJ |
1734 | |
1735 | /* This function does not have a length parameter; it reads the | |
1736 | entire OBJECT). Also, it doesn't support objects fetched partly | |
1737 | from one target and partly from another (in a different stratum, | |
1738 | e.g. a core file and an executable). Both reasons make it | |
1739 | unsuitable for reading memory. */ | |
1740 | gdb_assert (object != TARGET_OBJECT_MEMORY); | |
1741 | ||
1742 | /* Start by reading up to 4K at a time. The target will throttle | |
1743 | this number down if necessary. */ | |
13547ab6 DJ |
1744 | while (1) |
1745 | { | |
9b409511 YQ |
1746 | ULONGEST xfered_len; |
1747 | enum target_xfer_status status; | |
1748 | ||
9018be22 SM |
1749 | buf.resize (buf_pos + chunk); |
1750 | ||
1751 | status = target_read_partial (ops, object, annex, | |
1752 | (gdb_byte *) &buf[buf_pos], | |
1753 | buf_pos, chunk, | |
9b409511 YQ |
1754 | &xfered_len); |
1755 | ||
1756 | if (status == TARGET_XFER_EOF) | |
13547ab6 DJ |
1757 | { |
1758 | /* Read all there was. */ | |
9018be22 SM |
1759 | buf.resize (buf_pos); |
1760 | return buf; | |
13547ab6 | 1761 | } |
9b409511 YQ |
1762 | else if (status != TARGET_XFER_OK) |
1763 | { | |
1764 | /* An error occurred. */ | |
9018be22 | 1765 | return {}; |
9b409511 | 1766 | } |
13547ab6 | 1767 | |
9b409511 | 1768 | buf_pos += xfered_len; |
13547ab6 | 1769 | |
13547ab6 DJ |
1770 | QUIT; |
1771 | } | |
1772 | } | |
1773 | ||
9018be22 | 1774 | /* See target.h */ |
159f81f3 | 1775 | |
9018be22 | 1776 | gdb::optional<gdb::byte_vector> |
159f81f3 | 1777 | target_read_alloc (struct target_ops *ops, enum target_object object, |
9018be22 | 1778 | const char *annex) |
159f81f3 | 1779 | { |
9018be22 | 1780 | return target_read_alloc_1<gdb_byte> (ops, object, annex); |
159f81f3 DJ |
1781 | } |
1782 | ||
b7b030ad | 1783 | /* See target.h. */ |
159f81f3 | 1784 | |
9018be22 | 1785 | gdb::optional<gdb::char_vector> |
159f81f3 DJ |
1786 | target_read_stralloc (struct target_ops *ops, enum target_object object, |
1787 | const char *annex) | |
1788 | { | |
9018be22 SM |
1789 | gdb::optional<gdb::char_vector> buf |
1790 | = target_read_alloc_1<char> (ops, object, annex); | |
159f81f3 | 1791 | |
9018be22 SM |
1792 | if (!buf) |
1793 | return {}; | |
159f81f3 | 1794 | |
d00a27c5 | 1795 | if (buf->empty () || buf->back () != '\0') |
9018be22 | 1796 | buf->push_back ('\0'); |
7313baad UW |
1797 | |
1798 | /* Check for embedded NUL bytes; but allow trailing NULs. */ | |
9018be22 SM |
1799 | for (auto it = std::find (buf->begin (), buf->end (), '\0'); |
1800 | it != buf->end (); it++) | |
1801 | if (*it != '\0') | |
7313baad UW |
1802 | { |
1803 | warning (_("target object %d, annex %s, " | |
1804 | "contained unexpected null characters"), | |
1805 | (int) object, annex ? annex : "(none)"); | |
1806 | break; | |
1807 | } | |
159f81f3 | 1808 | |
9018be22 | 1809 | return buf; |
159f81f3 DJ |
1810 | } |
1811 | ||
b6591e8b AC |
1812 | /* Memory transfer methods. */ |
1813 | ||
1814 | void | |
1b0ba102 | 1815 | get_target_memory (struct target_ops *ops, CORE_ADDR addr, gdb_byte *buf, |
b6591e8b AC |
1816 | LONGEST len) |
1817 | { | |
07b82ea5 PA |
1818 | /* This method is used to read from an alternate, non-current |
1819 | target. This read must bypass the overlay support (as symbols | |
1820 | don't match this target), and GDB's internal cache (wrong cache | |
1821 | for this target). */ | |
1822 | if (target_read (ops, TARGET_OBJECT_RAW_MEMORY, NULL, buf, addr, len) | |
b6591e8b | 1823 | != len) |
578d3588 | 1824 | memory_error (TARGET_XFER_E_IO, addr); |
b6591e8b AC |
1825 | } |
1826 | ||
1827 | ULONGEST | |
5d502164 MS |
1828 | get_target_memory_unsigned (struct target_ops *ops, CORE_ADDR addr, |
1829 | int len, enum bfd_endian byte_order) | |
b6591e8b | 1830 | { |
f6519ebc | 1831 | gdb_byte buf[sizeof (ULONGEST)]; |
b6591e8b AC |
1832 | |
1833 | gdb_assert (len <= sizeof (buf)); | |
1834 | get_target_memory (ops, addr, buf, len); | |
e17a4113 | 1835 | return extract_unsigned_integer (buf, len, byte_order); |
b6591e8b AC |
1836 | } |
1837 | ||
3db08215 MM |
1838 | /* See target.h. */ |
1839 | ||
d914c394 SS |
1840 | int |
1841 | target_insert_breakpoint (struct gdbarch *gdbarch, | |
1842 | struct bp_target_info *bp_tgt) | |
1843 | { | |
1844 | if (!may_insert_breakpoints) | |
1845 | { | |
1846 | warning (_("May not insert breakpoints")); | |
1847 | return 1; | |
1848 | } | |
1849 | ||
8b88a78e | 1850 | return current_top_target ()->insert_breakpoint (gdbarch, bp_tgt); |
d914c394 SS |
1851 | } |
1852 | ||
3db08215 MM |
1853 | /* See target.h. */ |
1854 | ||
d914c394 | 1855 | int |
6b84065d | 1856 | target_remove_breakpoint (struct gdbarch *gdbarch, |
73971819 PA |
1857 | struct bp_target_info *bp_tgt, |
1858 | enum remove_bp_reason reason) | |
d914c394 SS |
1859 | { |
1860 | /* This is kind of a weird case to handle, but the permission might | |
1861 | have been changed after breakpoints were inserted - in which case | |
1862 | we should just take the user literally and assume that any | |
1863 | breakpoints should be left in place. */ | |
1864 | if (!may_insert_breakpoints) | |
1865 | { | |
1866 | warning (_("May not remove breakpoints")); | |
1867 | return 1; | |
1868 | } | |
1869 | ||
8b88a78e | 1870 | return current_top_target ()->remove_breakpoint (gdbarch, bp_tgt, reason); |
d914c394 SS |
1871 | } |
1872 | ||
c906108c | 1873 | static void |
1d12d88f | 1874 | info_target_command (const char *args, int from_tty) |
c906108c | 1875 | { |
c906108c | 1876 | int has_all_mem = 0; |
c5aa993b | 1877 | |
c906108c | 1878 | if (symfile_objfile != NULL) |
4262abfb JK |
1879 | printf_unfiltered (_("Symbols from \"%s\".\n"), |
1880 | objfile_name (symfile_objfile)); | |
c906108c | 1881 | |
b6a8c27b | 1882 | for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
c906108c | 1883 | { |
f6ac5f3d | 1884 | if (!t->has_memory ()) |
c906108c SS |
1885 | continue; |
1886 | ||
66b4deae | 1887 | if ((int) (t->stratum ()) <= (int) dummy_stratum) |
c906108c SS |
1888 | continue; |
1889 | if (has_all_mem) | |
3e43a32a MS |
1890 | printf_unfiltered (_("\tWhile running this, " |
1891 | "GDB does not access memory from...\n")); | |
f6ac5f3d PA |
1892 | printf_unfiltered ("%s:\n", t->longname ()); |
1893 | t->files_info (); | |
1894 | has_all_mem = t->has_all_memory (); | |
c906108c SS |
1895 | } |
1896 | } | |
1897 | ||
fd79ecee DJ |
1898 | /* This function is called before any new inferior is created, e.g. |
1899 | by running a program, attaching, or connecting to a target. | |
1900 | It cleans up any state from previous invocations which might | |
1901 | change between runs. This is a subset of what target_preopen | |
1902 | resets (things which might change between targets). */ | |
1903 | ||
1904 | void | |
1905 | target_pre_inferior (int from_tty) | |
1906 | { | |
c378eb4e | 1907 | /* Clear out solib state. Otherwise the solib state of the previous |
b9db4ced | 1908 | inferior might have survived and is entirely wrong for the new |
c378eb4e | 1909 | target. This has been observed on GNU/Linux using glibc 2.3. How |
b9db4ced UW |
1910 | to reproduce: |
1911 | ||
1912 | bash$ ./foo& | |
1913 | [1] 4711 | |
1914 | bash$ ./foo& | |
1915 | [1] 4712 | |
1916 | bash$ gdb ./foo | |
1917 | [...] | |
1918 | (gdb) attach 4711 | |
1919 | (gdb) detach | |
1920 | (gdb) attach 4712 | |
1921 | Cannot access memory at address 0xdeadbeef | |
1922 | */ | |
b9db4ced | 1923 | |
50c71eaf PA |
1924 | /* In some OSs, the shared library list is the same/global/shared |
1925 | across inferiors. If code is shared between processes, so are | |
1926 | memory regions and features. */ | |
f5656ead | 1927 | if (!gdbarch_has_global_solist (target_gdbarch ())) |
50c71eaf PA |
1928 | { |
1929 | no_shared_libraries (NULL, from_tty); | |
1930 | ||
1931 | invalidate_target_mem_regions (); | |
424163ea | 1932 | |
50c71eaf PA |
1933 | target_clear_description (); |
1934 | } | |
8ffcbaaf | 1935 | |
e9756d52 PP |
1936 | /* attach_flag may be set if the previous process associated with |
1937 | the inferior was attached to. */ | |
1938 | current_inferior ()->attach_flag = 0; | |
1939 | ||
5d5658a1 PA |
1940 | current_inferior ()->highest_thread_num = 0; |
1941 | ||
8ffcbaaf | 1942 | agent_capability_invalidate (); |
fd79ecee DJ |
1943 | } |
1944 | ||
b8fa0bfa PA |
1945 | /* Callback for iterate_over_inferiors. Gets rid of the given |
1946 | inferior. */ | |
1947 | ||
1948 | static int | |
1949 | dispose_inferior (struct inferior *inf, void *args) | |
1950 | { | |
9d4a934c AB |
1951 | /* Not all killed inferiors can, or will ever be, removed from the |
1952 | inferior list. Killed inferiors clearly don't need to be killed | |
1953 | again, so, we're done. */ | |
1954 | if (inf->pid == 0) | |
1955 | return 0; | |
1956 | ||
00431a78 PA |
1957 | thread_info *thread = any_thread_of_inferior (inf); |
1958 | if (thread != NULL) | |
b8fa0bfa | 1959 | { |
00431a78 | 1960 | switch_to_thread (thread); |
b8fa0bfa PA |
1961 | |
1962 | /* Core inferiors actually should be detached, not killed. */ | |
1963 | if (target_has_execution) | |
1964 | target_kill (); | |
1965 | else | |
6e1e1966 | 1966 | target_detach (inf, 0); |
b8fa0bfa PA |
1967 | } |
1968 | ||
1969 | return 0; | |
1970 | } | |
1971 | ||
c906108c SS |
1972 | /* This is to be called by the open routine before it does |
1973 | anything. */ | |
1974 | ||
1975 | void | |
fba45db2 | 1976 | target_preopen (int from_tty) |
c906108c | 1977 | { |
c5aa993b | 1978 | dont_repeat (); |
c906108c | 1979 | |
b8fa0bfa | 1980 | if (have_inferiors ()) |
c5aa993b | 1981 | { |
adf40b2e | 1982 | if (!from_tty |
b8fa0bfa PA |
1983 | || !have_live_inferiors () |
1984 | || query (_("A program is being debugged already. Kill it? "))) | |
1985 | iterate_over_inferiors (dispose_inferior, NULL); | |
c906108c | 1986 | else |
8a3fe4f8 | 1987 | error (_("Program not killed.")); |
c906108c SS |
1988 | } |
1989 | ||
1990 | /* Calling target_kill may remove the target from the stack. But if | |
1991 | it doesn't (which seems like a win for UDI), remove it now. */ | |
87ab71f0 PA |
1992 | /* Leave the exec target, though. The user may be switching from a |
1993 | live process to a core of the same program. */ | |
460014f5 | 1994 | pop_all_targets_above (file_stratum); |
fd79ecee DJ |
1995 | |
1996 | target_pre_inferior (from_tty); | |
c906108c SS |
1997 | } |
1998 | ||
6bd6f3b6 | 1999 | /* See target.h. */ |
c906108c SS |
2000 | |
2001 | void | |
6e1e1966 | 2002 | target_detach (inferior *inf, int from_tty) |
c906108c | 2003 | { |
6e1e1966 SM |
2004 | /* As long as some to_detach implementations rely on the current_inferior |
2005 | (either directly, or indirectly, like through target_gdbarch or by | |
2006 | reading memory), INF needs to be the current inferior. When that | |
2007 | requirement will become no longer true, then we can remove this | |
2008 | assertion. */ | |
2009 | gdb_assert (inf == current_inferior ()); | |
2010 | ||
f5656ead | 2011 | if (gdbarch_has_global_breakpoints (target_gdbarch ())) |
50c71eaf PA |
2012 | /* Don't remove global breakpoints here. They're removed on |
2013 | disconnection from the target. */ | |
2014 | ; | |
2015 | else | |
2016 | /* If we're in breakpoints-always-inserted mode, have to remove | |
00431a78 PA |
2017 | breakpoints before detaching. */ |
2018 | remove_breakpoints_inf (current_inferior ()); | |
74960c60 | 2019 | |
24291992 PA |
2020 | prepare_for_detach (); |
2021 | ||
8b88a78e | 2022 | current_top_target ()->detach (inf, from_tty); |
c906108c SS |
2023 | } |
2024 | ||
6ad8ae5c | 2025 | void |
fee354ee | 2026 | target_disconnect (const char *args, int from_tty) |
6ad8ae5c | 2027 | { |
50c71eaf PA |
2028 | /* If we're in breakpoints-always-inserted mode or if breakpoints |
2029 | are global across processes, we have to remove them before | |
2030 | disconnecting. */ | |
74960c60 VP |
2031 | remove_breakpoints (); |
2032 | ||
8b88a78e | 2033 | current_top_target ()->disconnect (args, from_tty); |
6ad8ae5c DJ |
2034 | } |
2035 | ||
f2b9e3df SDJ |
2036 | /* See target/target.h. */ |
2037 | ||
117de6a9 | 2038 | ptid_t |
47608cb1 | 2039 | target_wait (ptid_t ptid, struct target_waitstatus *status, int options) |
117de6a9 | 2040 | { |
8b88a78e | 2041 | return current_top_target ()->wait (ptid, status, options); |
117de6a9 PA |
2042 | } |
2043 | ||
0b333c5e PA |
2044 | /* See target.h. */ |
2045 | ||
2046 | ptid_t | |
2047 | default_target_wait (struct target_ops *ops, | |
2048 | ptid_t ptid, struct target_waitstatus *status, | |
2049 | int options) | |
2050 | { | |
2051 | status->kind = TARGET_WAITKIND_IGNORE; | |
2052 | return minus_one_ptid; | |
2053 | } | |
2054 | ||
7a114964 | 2055 | const char * |
117de6a9 PA |
2056 | target_pid_to_str (ptid_t ptid) |
2057 | { | |
8b88a78e | 2058 | return current_top_target ()->pid_to_str (ptid); |
117de6a9 PA |
2059 | } |
2060 | ||
73ede765 | 2061 | const char * |
4694da01 TT |
2062 | target_thread_name (struct thread_info *info) |
2063 | { | |
8b88a78e | 2064 | return current_top_target ()->thread_name (info); |
4694da01 TT |
2065 | } |
2066 | ||
e04ee09e KB |
2067 | struct thread_info * |
2068 | target_thread_handle_to_thread_info (const gdb_byte *thread_handle, | |
2069 | int handle_len, | |
2070 | struct inferior *inf) | |
2071 | { | |
8b88a78e | 2072 | return current_top_target ()->thread_handle_to_thread_info (thread_handle, |
f6ac5f3d | 2073 | handle_len, inf); |
e04ee09e KB |
2074 | } |
2075 | ||
e1ac3328 | 2076 | void |
2ea28649 | 2077 | target_resume (ptid_t ptid, int step, enum gdb_signal signal) |
e1ac3328 | 2078 | { |
4e5d721f | 2079 | target_dcache_invalidate (); |
28439f5e | 2080 | |
8b88a78e | 2081 | current_top_target ()->resume (ptid, step, signal); |
28439f5e | 2082 | |
6b84065d | 2083 | registers_changed_ptid (ptid); |
251bde03 | 2084 | /* We only set the internal executing state here. The user/frontend |
f2ffa92b PA |
2085 | running state is set at a higher level. This also clears the |
2086 | thread's stop_pc as side effect. */ | |
6b84065d | 2087 | set_executing (ptid, 1); |
6b84065d | 2088 | clear_inline_frame_state (ptid); |
e1ac3328 | 2089 | } |
2455069d | 2090 | |
85ad3aaf PA |
2091 | /* If true, target_commit_resume is a nop. */ |
2092 | static int defer_target_commit_resume; | |
2093 | ||
2094 | /* See target.h. */ | |
2095 | ||
2096 | void | |
2097 | target_commit_resume (void) | |
2098 | { | |
85ad3aaf PA |
2099 | if (defer_target_commit_resume) |
2100 | return; | |
2101 | ||
8b88a78e | 2102 | current_top_target ()->commit_resume (); |
85ad3aaf PA |
2103 | } |
2104 | ||
2105 | /* See target.h. */ | |
2106 | ||
a9bc57b9 TT |
2107 | scoped_restore_tmpl<int> |
2108 | make_scoped_defer_target_commit_resume () | |
85ad3aaf | 2109 | { |
a9bc57b9 | 2110 | return make_scoped_restore (&defer_target_commit_resume, 1); |
85ad3aaf PA |
2111 | } |
2112 | ||
2455069d | 2113 | void |
adc6a863 | 2114 | target_pass_signals (gdb::array_view<const unsigned char> pass_signals) |
2455069d | 2115 | { |
adc6a863 | 2116 | current_top_target ()->pass_signals (pass_signals); |
2455069d UW |
2117 | } |
2118 | ||
9b224c5e | 2119 | void |
adc6a863 | 2120 | target_program_signals (gdb::array_view<const unsigned char> program_signals) |
9b224c5e | 2121 | { |
adc6a863 | 2122 | current_top_target ()->program_signals (program_signals); |
9b224c5e PA |
2123 | } |
2124 | ||
098dba18 TT |
2125 | static int |
2126 | default_follow_fork (struct target_ops *self, int follow_child, | |
2127 | int detach_fork) | |
2128 | { | |
2129 | /* Some target returned a fork event, but did not know how to follow it. */ | |
2130 | internal_error (__FILE__, __LINE__, | |
2131 | _("could not find a target to follow fork")); | |
2132 | } | |
2133 | ||
ee057212 DJ |
2134 | /* Look through the list of possible targets for a target that can |
2135 | follow forks. */ | |
2136 | ||
2137 | int | |
07107ca6 | 2138 | target_follow_fork (int follow_child, int detach_fork) |
ee057212 | 2139 | { |
8b88a78e | 2140 | return current_top_target ()->follow_fork (follow_child, detach_fork); |
ee057212 DJ |
2141 | } |
2142 | ||
94585166 DB |
2143 | /* Target wrapper for follow exec hook. */ |
2144 | ||
2145 | void | |
2146 | target_follow_exec (struct inferior *inf, char *execd_pathname) | |
2147 | { | |
8b88a78e | 2148 | current_top_target ()->follow_exec (inf, execd_pathname); |
94585166 DB |
2149 | } |
2150 | ||
8d657035 TT |
2151 | static void |
2152 | default_mourn_inferior (struct target_ops *self) | |
2153 | { | |
2154 | internal_error (__FILE__, __LINE__, | |
2155 | _("could not find a target to follow mourn inferior")); | |
2156 | } | |
2157 | ||
136d6dae | 2158 | void |
bc1e6c81 | 2159 | target_mourn_inferior (ptid_t ptid) |
136d6dae | 2160 | { |
d7e15655 | 2161 | gdb_assert (ptid == inferior_ptid); |
8b88a78e | 2162 | current_top_target ()->mourn_inferior (); |
136d6dae | 2163 | |
8d657035 TT |
2164 | /* We no longer need to keep handles on any of the object files. |
2165 | Make sure to release them to avoid unnecessarily locking any | |
2166 | of them while we're not actually debugging. */ | |
2167 | bfd_cache_close_all (); | |
136d6dae VP |
2168 | } |
2169 | ||
424163ea DJ |
2170 | /* Look for a target which can describe architectural features, starting |
2171 | from TARGET. If we find one, return its description. */ | |
2172 | ||
2173 | const struct target_desc * | |
2174 | target_read_description (struct target_ops *target) | |
2175 | { | |
f6ac5f3d | 2176 | return target->read_description (); |
424163ea DJ |
2177 | } |
2178 | ||
58a5184e | 2179 | /* This implements a basic search of memory, reading target memory and |
08388c79 DE |
2180 | performing the search here (as opposed to performing the search in on the |
2181 | target side with, for example, gdbserver). */ | |
2182 | ||
2183 | int | |
2184 | simple_search_memory (struct target_ops *ops, | |
2185 | CORE_ADDR start_addr, ULONGEST search_space_len, | |
2186 | const gdb_byte *pattern, ULONGEST pattern_len, | |
2187 | CORE_ADDR *found_addrp) | |
2188 | { | |
2189 | /* NOTE: also defined in find.c testcase. */ | |
2190 | #define SEARCH_CHUNK_SIZE 16000 | |
2191 | const unsigned chunk_size = SEARCH_CHUNK_SIZE; | |
2192 | /* Buffer to hold memory contents for searching. */ | |
08388c79 | 2193 | unsigned search_buf_size; |
08388c79 DE |
2194 | |
2195 | search_buf_size = chunk_size + pattern_len - 1; | |
2196 | ||
2197 | /* No point in trying to allocate a buffer larger than the search space. */ | |
2198 | if (search_space_len < search_buf_size) | |
2199 | search_buf_size = search_space_len; | |
2200 | ||
26fcd5d7 | 2201 | gdb::byte_vector search_buf (search_buf_size); |
08388c79 DE |
2202 | |
2203 | /* Prime the search buffer. */ | |
2204 | ||
2205 | if (target_read (ops, TARGET_OBJECT_MEMORY, NULL, | |
26fcd5d7 TT |
2206 | search_buf.data (), start_addr, search_buf_size) |
2207 | != search_buf_size) | |
08388c79 | 2208 | { |
b3dc46ff AB |
2209 | warning (_("Unable to access %s bytes of target " |
2210 | "memory at %s, halting search."), | |
2211 | pulongest (search_buf_size), hex_string (start_addr)); | |
08388c79 DE |
2212 | return -1; |
2213 | } | |
2214 | ||
2215 | /* Perform the search. | |
2216 | ||
2217 | The loop is kept simple by allocating [N + pattern-length - 1] bytes. | |
2218 | When we've scanned N bytes we copy the trailing bytes to the start and | |
2219 | read in another N bytes. */ | |
2220 | ||
2221 | while (search_space_len >= pattern_len) | |
2222 | { | |
2223 | gdb_byte *found_ptr; | |
325fac50 PA |
2224 | unsigned nr_search_bytes |
2225 | = std::min (search_space_len, (ULONGEST) search_buf_size); | |
08388c79 | 2226 | |
26fcd5d7 | 2227 | found_ptr = (gdb_byte *) memmem (search_buf.data (), nr_search_bytes, |
d7f3ff3e | 2228 | pattern, pattern_len); |
08388c79 DE |
2229 | |
2230 | if (found_ptr != NULL) | |
2231 | { | |
26fcd5d7 | 2232 | CORE_ADDR found_addr = start_addr + (found_ptr - search_buf.data ()); |
5d502164 | 2233 | |
08388c79 | 2234 | *found_addrp = found_addr; |
08388c79 DE |
2235 | return 1; |
2236 | } | |
2237 | ||
2238 | /* Not found in this chunk, skip to next chunk. */ | |
2239 | ||
2240 | /* Don't let search_space_len wrap here, it's unsigned. */ | |
2241 | if (search_space_len >= chunk_size) | |
2242 | search_space_len -= chunk_size; | |
2243 | else | |
2244 | search_space_len = 0; | |
2245 | ||
2246 | if (search_space_len >= pattern_len) | |
2247 | { | |
2248 | unsigned keep_len = search_buf_size - chunk_size; | |
8a35fb51 | 2249 | CORE_ADDR read_addr = start_addr + chunk_size + keep_len; |
08388c79 DE |
2250 | int nr_to_read; |
2251 | ||
2252 | /* Copy the trailing part of the previous iteration to the front | |
2253 | of the buffer for the next iteration. */ | |
2254 | gdb_assert (keep_len == pattern_len - 1); | |
26fcd5d7 | 2255 | memcpy (&search_buf[0], &search_buf[chunk_size], keep_len); |
08388c79 | 2256 | |
325fac50 PA |
2257 | nr_to_read = std::min (search_space_len - keep_len, |
2258 | (ULONGEST) chunk_size); | |
08388c79 DE |
2259 | |
2260 | if (target_read (ops, TARGET_OBJECT_MEMORY, NULL, | |
26fcd5d7 | 2261 | &search_buf[keep_len], read_addr, |
08388c79 DE |
2262 | nr_to_read) != nr_to_read) |
2263 | { | |
b3dc46ff | 2264 | warning (_("Unable to access %s bytes of target " |
9b20d036 | 2265 | "memory at %s, halting search."), |
b3dc46ff | 2266 | plongest (nr_to_read), |
08388c79 | 2267 | hex_string (read_addr)); |
08388c79 DE |
2268 | return -1; |
2269 | } | |
2270 | ||
2271 | start_addr += chunk_size; | |
2272 | } | |
2273 | } | |
2274 | ||
2275 | /* Not found. */ | |
2276 | ||
08388c79 DE |
2277 | return 0; |
2278 | } | |
2279 | ||
58a5184e TT |
2280 | /* Default implementation of memory-searching. */ |
2281 | ||
2282 | static int | |
2283 | default_search_memory (struct target_ops *self, | |
2284 | CORE_ADDR start_addr, ULONGEST search_space_len, | |
2285 | const gdb_byte *pattern, ULONGEST pattern_len, | |
2286 | CORE_ADDR *found_addrp) | |
2287 | { | |
2288 | /* Start over from the top of the target stack. */ | |
8b88a78e | 2289 | return simple_search_memory (current_top_target (), |
58a5184e TT |
2290 | start_addr, search_space_len, |
2291 | pattern, pattern_len, found_addrp); | |
2292 | } | |
2293 | ||
08388c79 DE |
2294 | /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the |
2295 | sequence of bytes in PATTERN with length PATTERN_LEN. | |
2296 | ||
2297 | The result is 1 if found, 0 if not found, and -1 if there was an error | |
2298 | requiring halting of the search (e.g. memory read error). | |
2299 | If the pattern is found the address is recorded in FOUND_ADDRP. */ | |
2300 | ||
2301 | int | |
2302 | target_search_memory (CORE_ADDR start_addr, ULONGEST search_space_len, | |
2303 | const gdb_byte *pattern, ULONGEST pattern_len, | |
2304 | CORE_ADDR *found_addrp) | |
2305 | { | |
8b88a78e | 2306 | return current_top_target ()->search_memory (start_addr, search_space_len, |
f6ac5f3d | 2307 | pattern, pattern_len, found_addrp); |
08388c79 DE |
2308 | } |
2309 | ||
8edfe269 DJ |
2310 | /* Look through the currently pushed targets. If none of them will |
2311 | be able to restart the currently running process, issue an error | |
2312 | message. */ | |
2313 | ||
2314 | void | |
2315 | target_require_runnable (void) | |
2316 | { | |
b6a8c27b | 2317 | for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
8edfe269 DJ |
2318 | { |
2319 | /* If this target knows how to create a new program, then | |
2320 | assume we will still be able to after killing the current | |
2321 | one. Either killing and mourning will not pop T, or else | |
2322 | find_default_run_target will find it again. */ | |
f6ac5f3d | 2323 | if (t->can_create_inferior ()) |
8edfe269 DJ |
2324 | return; |
2325 | ||
548740d6 | 2326 | /* Do not worry about targets at certain strata that can not |
8edfe269 DJ |
2327 | create inferiors. Assume they will be pushed again if |
2328 | necessary, and continue to the process_stratum. */ | |
66b4deae | 2329 | if (t->stratum () > process_stratum) |
8edfe269 DJ |
2330 | continue; |
2331 | ||
3e43a32a MS |
2332 | error (_("The \"%s\" target does not support \"run\". " |
2333 | "Try \"help target\" or \"continue\"."), | |
f6ac5f3d | 2334 | t->shortname ()); |
8edfe269 DJ |
2335 | } |
2336 | ||
2337 | /* This function is only called if the target is running. In that | |
2338 | case there should have been a process_stratum target and it | |
c378eb4e | 2339 | should either know how to create inferiors, or not... */ |
9b20d036 | 2340 | internal_error (__FILE__, __LINE__, _("No targets found")); |
8edfe269 DJ |
2341 | } |
2342 | ||
6a3cb8e8 PA |
2343 | /* Whether GDB is allowed to fall back to the default run target for |
2344 | "run", "attach", etc. when no target is connected yet. */ | |
2345 | static int auto_connect_native_target = 1; | |
2346 | ||
2347 | static void | |
2348 | show_auto_connect_native_target (struct ui_file *file, int from_tty, | |
2349 | struct cmd_list_element *c, const char *value) | |
2350 | { | |
2351 | fprintf_filtered (file, | |
2352 | _("Whether GDB may automatically connect to the " | |
2353 | "native target is %s.\n"), | |
2354 | value); | |
2355 | } | |
2356 | ||
d9f719f1 PA |
2357 | /* A pointer to the target that can respond to "run" or "attach". |
2358 | Native targets are always singletons and instantiated early at GDB | |
2359 | startup. */ | |
2360 | static target_ops *the_native_target; | |
2361 | ||
2362 | /* See target.h. */ | |
2363 | ||
2364 | void | |
2365 | set_native_target (target_ops *target) | |
2366 | { | |
2367 | if (the_native_target != NULL) | |
2368 | internal_error (__FILE__, __LINE__, | |
2369 | _("native target already set (\"%s\")."), | |
2370 | the_native_target->longname ()); | |
2371 | ||
2372 | the_native_target = target; | |
2373 | } | |
2374 | ||
2375 | /* See target.h. */ | |
2376 | ||
2377 | target_ops * | |
2378 | get_native_target () | |
2379 | { | |
2380 | return the_native_target; | |
2381 | } | |
2382 | ||
c906108c SS |
2383 | /* Look through the list of possible targets for a target that can |
2384 | execute a run or attach command without any other data. This is | |
2385 | used to locate the default process stratum. | |
2386 | ||
5f667f2d PA |
2387 | If DO_MESG is not NULL, the result is always valid (error() is |
2388 | called for errors); else, return NULL on error. */ | |
c906108c SS |
2389 | |
2390 | static struct target_ops * | |
a121b7c1 | 2391 | find_default_run_target (const char *do_mesg) |
c906108c | 2392 | { |
d9f719f1 PA |
2393 | if (auto_connect_native_target && the_native_target != NULL) |
2394 | return the_native_target; | |
c906108c | 2395 | |
d9f719f1 PA |
2396 | if (do_mesg != NULL) |
2397 | error (_("Don't know how to %s. Try \"help target\"."), do_mesg); | |
2398 | return NULL; | |
c906108c SS |
2399 | } |
2400 | ||
b3ccfe11 | 2401 | /* See target.h. */ |
c906108c | 2402 | |
b3ccfe11 TT |
2403 | struct target_ops * |
2404 | find_attach_target (void) | |
c906108c | 2405 | { |
b3ccfe11 | 2406 | /* If a target on the current stack can attach, use it. */ |
b6a8c27b | 2407 | for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
b3ccfe11 | 2408 | { |
f6ac5f3d | 2409 | if (t->can_attach ()) |
d9f719f1 | 2410 | return t; |
b3ccfe11 | 2411 | } |
c906108c | 2412 | |
b3ccfe11 | 2413 | /* Otherwise, use the default run target for attaching. */ |
d9f719f1 | 2414 | return find_default_run_target ("attach"); |
b84876c2 PA |
2415 | } |
2416 | ||
b3ccfe11 | 2417 | /* See target.h. */ |
b84876c2 | 2418 | |
b3ccfe11 TT |
2419 | struct target_ops * |
2420 | find_run_target (void) | |
9908b566 | 2421 | { |
f6ac5f3d | 2422 | /* If a target on the current stack can run, use it. */ |
b6a8c27b | 2423 | for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
b3ccfe11 | 2424 | { |
f6ac5f3d | 2425 | if (t->can_create_inferior ()) |
d9f719f1 | 2426 | return t; |
b3ccfe11 | 2427 | } |
5d502164 | 2428 | |
b3ccfe11 | 2429 | /* Otherwise, use the default run target. */ |
d9f719f1 | 2430 | return find_default_run_target ("run"); |
9908b566 VP |
2431 | } |
2432 | ||
f6ac5f3d PA |
2433 | bool |
2434 | target_ops::info_proc (const char *args, enum info_proc_what what) | |
2435 | { | |
2436 | return false; | |
2437 | } | |
2438 | ||
145b16a9 UW |
2439 | /* Implement the "info proc" command. */ |
2440 | ||
451b7c33 | 2441 | int |
7bc112c1 | 2442 | target_info_proc (const char *args, enum info_proc_what what) |
145b16a9 UW |
2443 | { |
2444 | struct target_ops *t; | |
2445 | ||
2446 | /* If we're already connected to something that can get us OS | |
2447 | related data, use it. Otherwise, try using the native | |
2448 | target. */ | |
f6ac5f3d PA |
2449 | t = find_target_at (process_stratum); |
2450 | if (t == NULL) | |
145b16a9 UW |
2451 | t = find_default_run_target (NULL); |
2452 | ||
b6a8c27b | 2453 | for (; t != NULL; t = t->beneath ()) |
145b16a9 | 2454 | { |
f6ac5f3d | 2455 | if (t->info_proc (args, what)) |
145b16a9 | 2456 | { |
145b16a9 UW |
2457 | if (targetdebug) |
2458 | fprintf_unfiltered (gdb_stdlog, | |
2459 | "target_info_proc (\"%s\", %d)\n", args, what); | |
2460 | ||
451b7c33 | 2461 | return 1; |
145b16a9 UW |
2462 | } |
2463 | } | |
2464 | ||
451b7c33 | 2465 | return 0; |
145b16a9 UW |
2466 | } |
2467 | ||
03583c20 | 2468 | static int |
2bfc0540 | 2469 | find_default_supports_disable_randomization (struct target_ops *self) |
03583c20 UW |
2470 | { |
2471 | struct target_ops *t; | |
2472 | ||
2473 | t = find_default_run_target (NULL); | |
f6ac5f3d PA |
2474 | if (t != NULL) |
2475 | return t->supports_disable_randomization (); | |
03583c20 UW |
2476 | return 0; |
2477 | } | |
2478 | ||
2479 | int | |
2480 | target_supports_disable_randomization (void) | |
2481 | { | |
8b88a78e | 2482 | return current_top_target ()->supports_disable_randomization (); |
03583c20 | 2483 | } |
9908b566 | 2484 | |
1fb77080 SDJ |
2485 | /* See target/target.h. */ |
2486 | ||
2487 | int | |
2488 | target_supports_multi_process (void) | |
2489 | { | |
8b88a78e | 2490 | return current_top_target ()->supports_multi_process (); |
1fb77080 SDJ |
2491 | } |
2492 | ||
b7b030ad TT |
2493 | /* See target.h. */ |
2494 | ||
9018be22 | 2495 | gdb::optional<gdb::char_vector> |
07e059b5 VP |
2496 | target_get_osdata (const char *type) |
2497 | { | |
07e059b5 VP |
2498 | struct target_ops *t; |
2499 | ||
739ef7fb PA |
2500 | /* If we're already connected to something that can get us OS |
2501 | related data, use it. Otherwise, try using the native | |
2502 | target. */ | |
f6ac5f3d PA |
2503 | t = find_target_at (process_stratum); |
2504 | if (t == NULL) | |
739ef7fb | 2505 | t = find_default_run_target ("get OS data"); |
07e059b5 VP |
2506 | |
2507 | if (!t) | |
9018be22 | 2508 | return {}; |
07e059b5 | 2509 | |
6d097e65 | 2510 | return target_read_stralloc (t, TARGET_OBJECT_OSDATA, type); |
07e059b5 VP |
2511 | } |
2512 | ||
6c95b8df | 2513 | |
8eaff7cd TT |
2514 | /* Determine the current address space of thread PTID. */ |
2515 | ||
2516 | struct address_space * | |
2517 | target_thread_address_space (ptid_t ptid) | |
2518 | { | |
2519 | struct address_space *aspace; | |
2520 | ||
8b88a78e | 2521 | aspace = current_top_target ()->thread_address_space (ptid); |
8eaff7cd TT |
2522 | gdb_assert (aspace != NULL); |
2523 | ||
8eaff7cd TT |
2524 | return aspace; |
2525 | } | |
2526 | ||
b6a8c27b PA |
2527 | /* See target.h. */ |
2528 | ||
2529 | target_ops * | |
2530 | target_ops::beneath () const | |
2531 | { | |
a1740ee1 | 2532 | return g_target_stack.find_beneath (this); |
b6a8c27b PA |
2533 | } |
2534 | ||
f6ac5f3d PA |
2535 | void |
2536 | target_ops::close () | |
2537 | { | |
2538 | } | |
2539 | ||
2540 | bool | |
2541 | target_ops::can_attach () | |
2542 | { | |
2543 | return 0; | |
2544 | } | |
2545 | ||
2546 | void | |
2547 | target_ops::attach (const char *, int) | |
2548 | { | |
2549 | gdb_assert_not_reached ("target_ops::attach called"); | |
2550 | } | |
2551 | ||
2552 | bool | |
2553 | target_ops::can_create_inferior () | |
2554 | { | |
2555 | return 0; | |
2556 | } | |
2557 | ||
2558 | void | |
2559 | target_ops::create_inferior (const char *, const std::string &, | |
2560 | char **, int) | |
2561 | { | |
2562 | gdb_assert_not_reached ("target_ops::create_inferior called"); | |
2563 | } | |
2564 | ||
57810aa7 | 2565 | bool |
f6ac5f3d PA |
2566 | target_ops::can_run () |
2567 | { | |
57810aa7 | 2568 | return false; |
f6ac5f3d PA |
2569 | } |
2570 | ||
2571 | int | |
2572 | target_can_run () | |
2573 | { | |
b6a8c27b | 2574 | for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
f6ac5f3d PA |
2575 | { |
2576 | if (t->can_run ()) | |
2577 | return 1; | |
2578 | } | |
2579 | ||
2580 | return 0; | |
2581 | } | |
7313baad UW |
2582 | |
2583 | /* Target file operations. */ | |
2584 | ||
2585 | static struct target_ops * | |
2586 | default_fileio_target (void) | |
2587 | { | |
f6ac5f3d PA |
2588 | struct target_ops *t; |
2589 | ||
7313baad UW |
2590 | /* If we're already connected to something that can perform |
2591 | file I/O, use it. Otherwise, try using the native target. */ | |
f6ac5f3d PA |
2592 | t = find_target_at (process_stratum); |
2593 | if (t != NULL) | |
2594 | return t; | |
2595 | return find_default_run_target ("file I/O"); | |
7313baad UW |
2596 | } |
2597 | ||
1c4b552b GB |
2598 | /* File handle for target file operations. */ |
2599 | ||
5ff79300 | 2600 | struct fileio_fh_t |
1c4b552b | 2601 | { |
20db9c52 PA |
2602 | /* The target on which this file is open. NULL if the target is |
2603 | meanwhile closed while the handle is open. */ | |
5ff79300 | 2604 | target_ops *target; |
1c4b552b GB |
2605 | |
2606 | /* The file descriptor on the target. */ | |
5ff79300 | 2607 | int target_fd; |
1c4b552b | 2608 | |
5ff79300 PA |
2609 | /* Check whether this fileio_fh_t represents a closed file. */ |
2610 | bool is_closed () | |
2611 | { | |
2612 | return target_fd < 0; | |
2613 | } | |
2614 | }; | |
1c4b552b GB |
2615 | |
2616 | /* Vector of currently open file handles. The value returned by | |
2617 | target_fileio_open and passed as the FD argument to other | |
2618 | target_fileio_* functions is an index into this vector. This | |
2619 | vector's entries are never freed; instead, files are marked as | |
2620 | closed, and the handle becomes available for reuse. */ | |
5ff79300 | 2621 | static std::vector<fileio_fh_t> fileio_fhandles; |
1c4b552b GB |
2622 | |
2623 | /* Index into fileio_fhandles of the lowest handle that might be | |
2624 | closed. This permits handle reuse without searching the whole | |
2625 | list each time a new file is opened. */ | |
2626 | static int lowest_closed_fd; | |
2627 | ||
20db9c52 PA |
2628 | /* Invalidate the target associated with open handles that were open |
2629 | on target TARG, since we're about to close (and maybe destroy) the | |
2630 | target. The handles remain open from the client's perspective, but | |
2631 | trying to do anything with them other than closing them will fail | |
2632 | with EIO. */ | |
2633 | ||
2634 | static void | |
2635 | fileio_handles_invalidate_target (target_ops *targ) | |
2636 | { | |
2637 | for (fileio_fh_t &fh : fileio_fhandles) | |
2638 | if (fh.target == targ) | |
2639 | fh.target = NULL; | |
2640 | } | |
2641 | ||
1c4b552b GB |
2642 | /* Acquire a target fileio file descriptor. */ |
2643 | ||
2644 | static int | |
5ff79300 | 2645 | acquire_fileio_fd (target_ops *target, int target_fd) |
1c4b552b | 2646 | { |
1c4b552b | 2647 | /* Search for closed handles to reuse. */ |
5ff79300 PA |
2648 | for (; lowest_closed_fd < fileio_fhandles.size (); lowest_closed_fd++) |
2649 | { | |
2650 | fileio_fh_t &fh = fileio_fhandles[lowest_closed_fd]; | |
2651 | ||
2652 | if (fh.is_closed ()) | |
2653 | break; | |
2654 | } | |
1c4b552b GB |
2655 | |
2656 | /* Push a new handle if no closed handles were found. */ | |
5ff79300 PA |
2657 | if (lowest_closed_fd == fileio_fhandles.size ()) |
2658 | fileio_fhandles.push_back (fileio_fh_t {target, target_fd}); | |
2659 | else | |
2660 | fileio_fhandles[lowest_closed_fd] = {target, target_fd}; | |
1c4b552b | 2661 | |
5ff79300 PA |
2662 | /* Should no longer be marked closed. */ |
2663 | gdb_assert (!fileio_fhandles[lowest_closed_fd].is_closed ()); | |
1c4b552b GB |
2664 | |
2665 | /* Return its index, and start the next lookup at | |
2666 | the next index. */ | |
2667 | return lowest_closed_fd++; | |
2668 | } | |
2669 | ||
2670 | /* Release a target fileio file descriptor. */ | |
2671 | ||
2672 | static void | |
2673 | release_fileio_fd (int fd, fileio_fh_t *fh) | |
2674 | { | |
5ff79300 | 2675 | fh->target_fd = -1; |
325fac50 | 2676 | lowest_closed_fd = std::min (lowest_closed_fd, fd); |
1c4b552b GB |
2677 | } |
2678 | ||
2679 | /* Return a pointer to the fileio_fhandle_t corresponding to FD. */ | |
2680 | ||
5ff79300 PA |
2681 | static fileio_fh_t * |
2682 | fileio_fd_to_fh (int fd) | |
2683 | { | |
2684 | return &fileio_fhandles[fd]; | |
2685 | } | |
1c4b552b | 2686 | |
f6ac5f3d PA |
2687 | |
2688 | /* Default implementations of file i/o methods. We don't want these | |
2689 | to delegate automatically, because we need to know which target | |
2690 | supported the method, in order to call it directly from within | |
2691 | pread/pwrite, etc. */ | |
2692 | ||
2693 | int | |
2694 | target_ops::fileio_open (struct inferior *inf, const char *filename, | |
2695 | int flags, int mode, int warn_if_slow, | |
2696 | int *target_errno) | |
2697 | { | |
2698 | *target_errno = FILEIO_ENOSYS; | |
2699 | return -1; | |
2700 | } | |
2701 | ||
2702 | int | |
2703 | target_ops::fileio_pwrite (int fd, const gdb_byte *write_buf, int len, | |
2704 | ULONGEST offset, int *target_errno) | |
2705 | { | |
2706 | *target_errno = FILEIO_ENOSYS; | |
2707 | return -1; | |
2708 | } | |
2709 | ||
2710 | int | |
2711 | target_ops::fileio_pread (int fd, gdb_byte *read_buf, int len, | |
2712 | ULONGEST offset, int *target_errno) | |
2713 | { | |
2714 | *target_errno = FILEIO_ENOSYS; | |
2715 | return -1; | |
2716 | } | |
2717 | ||
2718 | int | |
2719 | target_ops::fileio_fstat (int fd, struct stat *sb, int *target_errno) | |
2720 | { | |
2721 | *target_errno = FILEIO_ENOSYS; | |
2722 | return -1; | |
2723 | } | |
2724 | ||
2725 | int | |
2726 | target_ops::fileio_close (int fd, int *target_errno) | |
2727 | { | |
2728 | *target_errno = FILEIO_ENOSYS; | |
2729 | return -1; | |
2730 | } | |
2731 | ||
2732 | int | |
2733 | target_ops::fileio_unlink (struct inferior *inf, const char *filename, | |
2734 | int *target_errno) | |
2735 | { | |
2736 | *target_errno = FILEIO_ENOSYS; | |
2737 | return -1; | |
2738 | } | |
2739 | ||
2740 | gdb::optional<std::string> | |
2741 | target_ops::fileio_readlink (struct inferior *inf, const char *filename, | |
2742 | int *target_errno) | |
2743 | { | |
2744 | *target_errno = FILEIO_ENOSYS; | |
2745 | return {}; | |
2746 | } | |
2747 | ||
4313b8c0 GB |
2748 | /* Helper for target_fileio_open and |
2749 | target_fileio_open_warn_if_slow. */ | |
12e2a5fd | 2750 | |
4313b8c0 GB |
2751 | static int |
2752 | target_fileio_open_1 (struct inferior *inf, const char *filename, | |
2753 | int flags, int mode, int warn_if_slow, | |
2754 | int *target_errno) | |
7313baad | 2755 | { |
b6a8c27b | 2756 | for (target_ops *t = default_fileio_target (); t != NULL; t = t->beneath ()) |
7313baad | 2757 | { |
f6ac5f3d PA |
2758 | int fd = t->fileio_open (inf, filename, flags, mode, |
2759 | warn_if_slow, target_errno); | |
7313baad | 2760 | |
f6ac5f3d PA |
2761 | if (fd == -1 && *target_errno == FILEIO_ENOSYS) |
2762 | continue; | |
1c4b552b | 2763 | |
f6ac5f3d PA |
2764 | if (fd < 0) |
2765 | fd = -1; | |
2766 | else | |
2767 | fd = acquire_fileio_fd (t, fd); | |
2768 | ||
2769 | if (targetdebug) | |
2770 | fprintf_unfiltered (gdb_stdlog, | |
4313b8c0 | 2771 | "target_fileio_open (%d,%s,0x%x,0%o,%d)" |
07c138c8 GB |
2772 | " = %d (%d)\n", |
2773 | inf == NULL ? 0 : inf->num, | |
7313baad | 2774 | filename, flags, mode, |
4313b8c0 GB |
2775 | warn_if_slow, fd, |
2776 | fd != -1 ? 0 : *target_errno); | |
f6ac5f3d | 2777 | return fd; |
7313baad UW |
2778 | } |
2779 | ||
2780 | *target_errno = FILEIO_ENOSYS; | |
2781 | return -1; | |
2782 | } | |
2783 | ||
12e2a5fd GB |
2784 | /* See target.h. */ |
2785 | ||
4313b8c0 GB |
2786 | int |
2787 | target_fileio_open (struct inferior *inf, const char *filename, | |
2788 | int flags, int mode, int *target_errno) | |
2789 | { | |
2790 | return target_fileio_open_1 (inf, filename, flags, mode, 0, | |
2791 | target_errno); | |
2792 | } | |
2793 | ||
2794 | /* See target.h. */ | |
2795 | ||
2796 | int | |
2797 | target_fileio_open_warn_if_slow (struct inferior *inf, | |
2798 | const char *filename, | |
2799 | int flags, int mode, int *target_errno) | |
2800 | { | |
2801 | return target_fileio_open_1 (inf, filename, flags, mode, 1, | |
2802 | target_errno); | |
2803 | } | |
2804 | ||
2805 | /* See target.h. */ | |
2806 | ||
7313baad UW |
2807 | int |
2808 | target_fileio_pwrite (int fd, const gdb_byte *write_buf, int len, | |
2809 | ULONGEST offset, int *target_errno) | |
2810 | { | |
1c4b552b GB |
2811 | fileio_fh_t *fh = fileio_fd_to_fh (fd); |
2812 | int ret = -1; | |
7313baad | 2813 | |
5ff79300 | 2814 | if (fh->is_closed ()) |
1c4b552b | 2815 | *target_errno = EBADF; |
20db9c52 PA |
2816 | else if (fh->target == NULL) |
2817 | *target_errno = EIO; | |
1c4b552b | 2818 | else |
f6ac5f3d PA |
2819 | ret = fh->target->fileio_pwrite (fh->target_fd, write_buf, |
2820 | len, offset, target_errno); | |
7313baad | 2821 | |
1c4b552b GB |
2822 | if (targetdebug) |
2823 | fprintf_unfiltered (gdb_stdlog, | |
2824 | "target_fileio_pwrite (%d,...,%d,%s) " | |
2825 | "= %d (%d)\n", | |
2826 | fd, len, pulongest (offset), | |
2827 | ret, ret != -1 ? 0 : *target_errno); | |
2828 | return ret; | |
7313baad UW |
2829 | } |
2830 | ||
12e2a5fd GB |
2831 | /* See target.h. */ |
2832 | ||
7313baad UW |
2833 | int |
2834 | target_fileio_pread (int fd, gdb_byte *read_buf, int len, | |
2835 | ULONGEST offset, int *target_errno) | |
2836 | { | |
1c4b552b GB |
2837 | fileio_fh_t *fh = fileio_fd_to_fh (fd); |
2838 | int ret = -1; | |
7313baad | 2839 | |
5ff79300 | 2840 | if (fh->is_closed ()) |
1c4b552b | 2841 | *target_errno = EBADF; |
20db9c52 PA |
2842 | else if (fh->target == NULL) |
2843 | *target_errno = EIO; | |
1c4b552b | 2844 | else |
f6ac5f3d PA |
2845 | ret = fh->target->fileio_pread (fh->target_fd, read_buf, |
2846 | len, offset, target_errno); | |
7313baad | 2847 | |
1c4b552b GB |
2848 | if (targetdebug) |
2849 | fprintf_unfiltered (gdb_stdlog, | |
2850 | "target_fileio_pread (%d,...,%d,%s) " | |
2851 | "= %d (%d)\n", | |
2852 | fd, len, pulongest (offset), | |
2853 | ret, ret != -1 ? 0 : *target_errno); | |
9b15c1f0 GB |
2854 | return ret; |
2855 | } | |
2856 | ||
2857 | /* See target.h. */ | |
12e2a5fd | 2858 | |
9b15c1f0 GB |
2859 | int |
2860 | target_fileio_fstat (int fd, struct stat *sb, int *target_errno) | |
2861 | { | |
2862 | fileio_fh_t *fh = fileio_fd_to_fh (fd); | |
2863 | int ret = -1; | |
2864 | ||
5ff79300 | 2865 | if (fh->is_closed ()) |
9b15c1f0 | 2866 | *target_errno = EBADF; |
20db9c52 PA |
2867 | else if (fh->target == NULL) |
2868 | *target_errno = EIO; | |
9b15c1f0 | 2869 | else |
f6ac5f3d | 2870 | ret = fh->target->fileio_fstat (fh->target_fd, sb, target_errno); |
9b15c1f0 GB |
2871 | |
2872 | if (targetdebug) | |
2873 | fprintf_unfiltered (gdb_stdlog, | |
2874 | "target_fileio_fstat (%d) = %d (%d)\n", | |
2875 | fd, ret, ret != -1 ? 0 : *target_errno); | |
1c4b552b | 2876 | return ret; |
7313baad UW |
2877 | } |
2878 | ||
12e2a5fd GB |
2879 | /* See target.h. */ |
2880 | ||
7313baad UW |
2881 | int |
2882 | target_fileio_close (int fd, int *target_errno) | |
2883 | { | |
1c4b552b GB |
2884 | fileio_fh_t *fh = fileio_fd_to_fh (fd); |
2885 | int ret = -1; | |
7313baad | 2886 | |
5ff79300 | 2887 | if (fh->is_closed ()) |
1c4b552b GB |
2888 | *target_errno = EBADF; |
2889 | else | |
7313baad | 2890 | { |
20db9c52 | 2891 | if (fh->target != NULL) |
f6ac5f3d PA |
2892 | ret = fh->target->fileio_close (fh->target_fd, |
2893 | target_errno); | |
20db9c52 PA |
2894 | else |
2895 | ret = 0; | |
1c4b552b | 2896 | release_fileio_fd (fd, fh); |
7313baad UW |
2897 | } |
2898 | ||
1c4b552b GB |
2899 | if (targetdebug) |
2900 | fprintf_unfiltered (gdb_stdlog, | |
2901 | "target_fileio_close (%d) = %d (%d)\n", | |
2902 | fd, ret, ret != -1 ? 0 : *target_errno); | |
2903 | return ret; | |
7313baad UW |
2904 | } |
2905 | ||
12e2a5fd GB |
2906 | /* See target.h. */ |
2907 | ||
7313baad | 2908 | int |
07c138c8 GB |
2909 | target_fileio_unlink (struct inferior *inf, const char *filename, |
2910 | int *target_errno) | |
7313baad | 2911 | { |
b6a8c27b | 2912 | for (target_ops *t = default_fileio_target (); t != NULL; t = t->beneath ()) |
7313baad | 2913 | { |
f6ac5f3d | 2914 | int ret = t->fileio_unlink (inf, filename, target_errno); |
7313baad | 2915 | |
f6ac5f3d PA |
2916 | if (ret == -1 && *target_errno == FILEIO_ENOSYS) |
2917 | continue; | |
2918 | ||
2919 | if (targetdebug) | |
2920 | fprintf_unfiltered (gdb_stdlog, | |
2921 | "target_fileio_unlink (%d,%s)" | |
2922 | " = %d (%d)\n", | |
2923 | inf == NULL ? 0 : inf->num, filename, | |
2924 | ret, ret != -1 ? 0 : *target_errno); | |
2925 | return ret; | |
7313baad UW |
2926 | } |
2927 | ||
2928 | *target_errno = FILEIO_ENOSYS; | |
2929 | return -1; | |
2930 | } | |
2931 | ||
12e2a5fd GB |
2932 | /* See target.h. */ |
2933 | ||
e0d3522b | 2934 | gdb::optional<std::string> |
07c138c8 GB |
2935 | target_fileio_readlink (struct inferior *inf, const char *filename, |
2936 | int *target_errno) | |
b9e7b9c3 | 2937 | { |
b6a8c27b | 2938 | for (target_ops *t = default_fileio_target (); t != NULL; t = t->beneath ()) |
b9e7b9c3 | 2939 | { |
f6ac5f3d PA |
2940 | gdb::optional<std::string> ret |
2941 | = t->fileio_readlink (inf, filename, target_errno); | |
b9e7b9c3 | 2942 | |
f6ac5f3d PA |
2943 | if (!ret.has_value () && *target_errno == FILEIO_ENOSYS) |
2944 | continue; | |
2945 | ||
2946 | if (targetdebug) | |
2947 | fprintf_unfiltered (gdb_stdlog, | |
2948 | "target_fileio_readlink (%d,%s)" | |
2949 | " = %s (%d)\n", | |
2950 | inf == NULL ? 0 : inf->num, | |
2951 | filename, ret ? ret->c_str () : "(nil)", | |
2952 | ret ? 0 : *target_errno); | |
2953 | return ret; | |
b9e7b9c3 UW |
2954 | } |
2955 | ||
2956 | *target_errno = FILEIO_ENOSYS; | |
e0d3522b | 2957 | return {}; |
b9e7b9c3 UW |
2958 | } |
2959 | ||
770623f7 TT |
2960 | /* Like scoped_fd, but specific to target fileio. */ |
2961 | ||
2962 | class scoped_target_fd | |
7313baad | 2963 | { |
770623f7 TT |
2964 | public: |
2965 | explicit scoped_target_fd (int fd) noexcept | |
2966 | : m_fd (fd) | |
2967 | { | |
2968 | } | |
7313baad | 2969 | |
770623f7 TT |
2970 | ~scoped_target_fd () |
2971 | { | |
2972 | if (m_fd >= 0) | |
2973 | { | |
2974 | int target_errno; | |
2975 | ||
2976 | target_fileio_close (m_fd, &target_errno); | |
2977 | } | |
2978 | } | |
2979 | ||
2980 | DISABLE_COPY_AND_ASSIGN (scoped_target_fd); | |
2981 | ||
2982 | int get () const noexcept | |
2983 | { | |
2984 | return m_fd; | |
2985 | } | |
2986 | ||
2987 | private: | |
2988 | int m_fd; | |
2989 | }; | |
7313baad | 2990 | |
07c138c8 GB |
2991 | /* Read target file FILENAME, in the filesystem as seen by INF. If |
2992 | INF is NULL, use the filesystem seen by the debugger (GDB or, for | |
2993 | remote targets, the remote stub). Store the result in *BUF_P and | |
2994 | return the size of the transferred data. PADDING additional bytes | |
2995 | are available in *BUF_P. This is a helper function for | |
2996 | target_fileio_read_alloc; see the declaration of that function for | |
2997 | more information. */ | |
7313baad | 2998 | |
f7af1fcd JK |
2999 | static LONGEST |
3000 | target_fileio_read_alloc_1 (struct inferior *inf, const char *filename, | |
3001 | gdb_byte **buf_p, int padding) | |
3002 | { | |
db1ff28b JK |
3003 | size_t buf_alloc, buf_pos; |
3004 | gdb_byte *buf; | |
3005 | LONGEST n; | |
db1ff28b | 3006 | int target_errno; |
f7af1fcd | 3007 | |
770623f7 TT |
3008 | scoped_target_fd fd (target_fileio_open (inf, filename, FILEIO_O_RDONLY, |
3009 | 0700, &target_errno)); | |
3010 | if (fd.get () == -1) | |
f7af1fcd JK |
3011 | return -1; |
3012 | ||
db1ff28b JK |
3013 | /* Start by reading up to 4K at a time. The target will throttle |
3014 | this number down if necessary. */ | |
3015 | buf_alloc = 4096; | |
224c3ddb | 3016 | buf = (gdb_byte *) xmalloc (buf_alloc); |
db1ff28b JK |
3017 | buf_pos = 0; |
3018 | while (1) | |
3019 | { | |
770623f7 | 3020 | n = target_fileio_pread (fd.get (), &buf[buf_pos], |
db1ff28b JK |
3021 | buf_alloc - buf_pos - padding, buf_pos, |
3022 | &target_errno); | |
3023 | if (n < 0) | |
3024 | { | |
3025 | /* An error occurred. */ | |
db1ff28b JK |
3026 | xfree (buf); |
3027 | return -1; | |
3028 | } | |
3029 | else if (n == 0) | |
3030 | { | |
3031 | /* Read all there was. */ | |
db1ff28b JK |
3032 | if (buf_pos == 0) |
3033 | xfree (buf); | |
3034 | else | |
3035 | *buf_p = buf; | |
3036 | return buf_pos; | |
3037 | } | |
3038 | ||
3039 | buf_pos += n; | |
3040 | ||
3041 | /* If the buffer is filling up, expand it. */ | |
3042 | if (buf_alloc < buf_pos * 2) | |
3043 | { | |
3044 | buf_alloc *= 2; | |
224c3ddb | 3045 | buf = (gdb_byte *) xrealloc (buf, buf_alloc); |
db1ff28b JK |
3046 | } |
3047 | ||
3048 | QUIT; | |
3049 | } | |
f7af1fcd JK |
3050 | } |
3051 | ||
12e2a5fd | 3052 | /* See target.h. */ |
7313baad UW |
3053 | |
3054 | LONGEST | |
07c138c8 GB |
3055 | target_fileio_read_alloc (struct inferior *inf, const char *filename, |
3056 | gdb_byte **buf_p) | |
7313baad | 3057 | { |
07c138c8 | 3058 | return target_fileio_read_alloc_1 (inf, filename, buf_p, 0); |
7313baad UW |
3059 | } |
3060 | ||
db1ff28b | 3061 | /* See target.h. */ |
f7af1fcd | 3062 | |
87028b87 | 3063 | gdb::unique_xmalloc_ptr<char> |
f7af1fcd JK |
3064 | target_fileio_read_stralloc (struct inferior *inf, const char *filename) |
3065 | { | |
db1ff28b JK |
3066 | gdb_byte *buffer; |
3067 | char *bufstr; | |
3068 | LONGEST i, transferred; | |
3069 | ||
3070 | transferred = target_fileio_read_alloc_1 (inf, filename, &buffer, 1); | |
3071 | bufstr = (char *) buffer; | |
3072 | ||
3073 | if (transferred < 0) | |
87028b87 | 3074 | return gdb::unique_xmalloc_ptr<char> (nullptr); |
db1ff28b JK |
3075 | |
3076 | if (transferred == 0) | |
87028b87 | 3077 | return gdb::unique_xmalloc_ptr<char> (xstrdup ("")); |
db1ff28b JK |
3078 | |
3079 | bufstr[transferred] = 0; | |
3080 | ||
3081 | /* Check for embedded NUL bytes; but allow trailing NULs. */ | |
3082 | for (i = strlen (bufstr); i < transferred; i++) | |
3083 | if (bufstr[i] != 0) | |
3084 | { | |
3085 | warning (_("target file %s " | |
3086 | "contained unexpected null characters"), | |
3087 | filename); | |
3088 | break; | |
3089 | } | |
3090 | ||
87028b87 | 3091 | return gdb::unique_xmalloc_ptr<char> (bufstr); |
f7af1fcd | 3092 | } |
7313baad | 3093 | |
db1ff28b | 3094 | |
e0d24f8d | 3095 | static int |
31568a15 TT |
3096 | default_region_ok_for_hw_watchpoint (struct target_ops *self, |
3097 | CORE_ADDR addr, int len) | |
e0d24f8d | 3098 | { |
f5656ead | 3099 | return (len <= gdbarch_ptr_bit (target_gdbarch ()) / TARGET_CHAR_BIT); |
ccaa32c7 GS |
3100 | } |
3101 | ||
5009afc5 AS |
3102 | static int |
3103 | default_watchpoint_addr_within_range (struct target_ops *target, | |
3104 | CORE_ADDR addr, | |
3105 | CORE_ADDR start, int length) | |
3106 | { | |
3107 | return addr >= start && addr < start + length; | |
3108 | } | |
3109 | ||
8b06beed TT |
3110 | /* See target.h. */ |
3111 | ||
a1740ee1 PA |
3112 | target_ops * |
3113 | target_stack::find_beneath (const target_ops *t) const | |
8b06beed | 3114 | { |
a1740ee1 | 3115 | /* Look for a non-empty slot at stratum levels beneath T's. */ |
66b4deae | 3116 | for (int stratum = t->stratum () - 1; stratum >= 0; --stratum) |
a1740ee1 PA |
3117 | if (m_stack[stratum] != NULL) |
3118 | return m_stack[stratum]; | |
8b06beed TT |
3119 | |
3120 | return NULL; | |
3121 | } | |
3122 | ||
a1740ee1 PA |
3123 | /* See target.h. */ |
3124 | ||
3125 | struct target_ops * | |
3126 | find_target_at (enum strata stratum) | |
3127 | { | |
3128 | return g_target_stack.at (stratum); | |
3129 | } | |
3130 | ||
c906108c | 3131 | \f |
0f48b757 PA |
3132 | |
3133 | /* See target.h */ | |
3134 | ||
3135 | void | |
3136 | target_announce_detach (int from_tty) | |
3137 | { | |
3138 | pid_t pid; | |
a121b7c1 | 3139 | const char *exec_file; |
0f48b757 PA |
3140 | |
3141 | if (!from_tty) | |
3142 | return; | |
3143 | ||
3144 | exec_file = get_exec_file (0); | |
3145 | if (exec_file == NULL) | |
3146 | exec_file = ""; | |
3147 | ||
e99b03dc | 3148 | pid = inferior_ptid.pid (); |
0f48b757 | 3149 | printf_unfiltered (_("Detaching from program: %s, %s\n"), exec_file, |
f2907e49 | 3150 | target_pid_to_str (ptid_t (pid))); |
0f48b757 PA |
3151 | gdb_flush (gdb_stdout); |
3152 | } | |
3153 | ||
c906108c SS |
3154 | /* The inferior process has died. Long live the inferior! */ |
3155 | ||
3156 | void | |
fba45db2 | 3157 | generic_mourn_inferior (void) |
c906108c | 3158 | { |
00431a78 | 3159 | inferior *inf = current_inferior (); |
c906108c | 3160 | |
39f77062 | 3161 | inferior_ptid = null_ptid; |
7f9f62ba | 3162 | |
f59f708a PA |
3163 | /* Mark breakpoints uninserted in case something tries to delete a |
3164 | breakpoint while we delete the inferior's threads (which would | |
3165 | fail, since the inferior is long gone). */ | |
3166 | mark_breakpoints_out (); | |
3167 | ||
00431a78 PA |
3168 | if (inf->pid != 0) |
3169 | exit_inferior (inf); | |
7f9f62ba | 3170 | |
f59f708a PA |
3171 | /* Note this wipes step-resume breakpoints, so needs to be done |
3172 | after exit_inferior, which ends up referencing the step-resume | |
3173 | breakpoints through clear_thread_inferior_resources. */ | |
c906108c | 3174 | breakpoint_init_inferior (inf_exited); |
f59f708a | 3175 | |
c906108c SS |
3176 | registers_changed (); |
3177 | ||
c906108c SS |
3178 | reopen_exec_file (); |
3179 | reinit_frame_cache (); | |
3180 | ||
9a4105ab AC |
3181 | if (deprecated_detach_hook) |
3182 | deprecated_detach_hook (); | |
c906108c SS |
3183 | } |
3184 | \f | |
fd0a2a6f MK |
3185 | /* Convert a normal process ID to a string. Returns the string in a |
3186 | static buffer. */ | |
c906108c | 3187 | |
7a114964 | 3188 | const char * |
39f77062 | 3189 | normal_pid_to_str (ptid_t ptid) |
c906108c | 3190 | { |
fd0a2a6f | 3191 | static char buf[32]; |
c906108c | 3192 | |
e99b03dc | 3193 | xsnprintf (buf, sizeof buf, "process %d", ptid.pid ()); |
c906108c SS |
3194 | return buf; |
3195 | } | |
3196 | ||
7a114964 | 3197 | static const char * |
770234d3 | 3198 | default_pid_to_str (struct target_ops *ops, ptid_t ptid) |
117de6a9 PA |
3199 | { |
3200 | return normal_pid_to_str (ptid); | |
3201 | } | |
3202 | ||
9b4eba8e HZ |
3203 | /* Error-catcher for target_find_memory_regions. */ |
3204 | static int | |
2e73927c TT |
3205 | dummy_find_memory_regions (struct target_ops *self, |
3206 | find_memory_region_ftype ignore1, void *ignore2) | |
be4d1333 | 3207 | { |
9b4eba8e | 3208 | error (_("Command not implemented for this target.")); |
be4d1333 MS |
3209 | return 0; |
3210 | } | |
3211 | ||
9b4eba8e HZ |
3212 | /* Error-catcher for target_make_corefile_notes. */ |
3213 | static char * | |
fc6691b2 TT |
3214 | dummy_make_corefile_notes (struct target_ops *self, |
3215 | bfd *ignore1, int *ignore2) | |
be4d1333 | 3216 | { |
9b4eba8e | 3217 | error (_("Command not implemented for this target.")); |
be4d1333 MS |
3218 | return NULL; |
3219 | } | |
3220 | ||
f6ac5f3d PA |
3221 | #include "target-delegates.c" |
3222 | ||
c906108c | 3223 | |
d9f719f1 PA |
3224 | static const target_info dummy_target_info = { |
3225 | "None", | |
3226 | N_("None"), | |
3227 | "" | |
3228 | }; | |
3229 | ||
66b4deae PA |
3230 | strata |
3231 | dummy_target::stratum () const | |
f6ac5f3d | 3232 | { |
66b4deae | 3233 | return dummy_stratum; |
f6ac5f3d PA |
3234 | } |
3235 | ||
66b4deae PA |
3236 | strata |
3237 | debug_target::stratum () const | |
f6ac5f3d | 3238 | { |
66b4deae | 3239 | return debug_stratum; |
f6ac5f3d PA |
3240 | } |
3241 | ||
d9f719f1 PA |
3242 | const target_info & |
3243 | dummy_target::info () const | |
f6ac5f3d | 3244 | { |
d9f719f1 | 3245 | return dummy_target_info; |
f6ac5f3d PA |
3246 | } |
3247 | ||
d9f719f1 PA |
3248 | const target_info & |
3249 | debug_target::info () const | |
f6ac5f3d | 3250 | { |
b6a8c27b | 3251 | return beneath ()->info (); |
f6ac5f3d PA |
3252 | } |
3253 | ||
c906108c | 3254 | \f |
c906108c | 3255 | |
f1c07ab0 | 3256 | void |
460014f5 | 3257 | target_close (struct target_ops *targ) |
f1c07ab0 | 3258 | { |
7fdc1521 TT |
3259 | gdb_assert (!target_is_pushed (targ)); |
3260 | ||
20db9c52 PA |
3261 | fileio_handles_invalidate_target (targ); |
3262 | ||
f6ac5f3d | 3263 | targ->close (); |
947b8855 PA |
3264 | |
3265 | if (targetdebug) | |
460014f5 | 3266 | fprintf_unfiltered (gdb_stdlog, "target_close ()\n"); |
f1c07ab0 AC |
3267 | } |
3268 | ||
28439f5e PA |
3269 | int |
3270 | target_thread_alive (ptid_t ptid) | |
c906108c | 3271 | { |
8b88a78e | 3272 | return current_top_target ()->thread_alive (ptid); |
28439f5e PA |
3273 | } |
3274 | ||
3275 | void | |
e8032dde | 3276 | target_update_thread_list (void) |
28439f5e | 3277 | { |
8b88a78e | 3278 | current_top_target ()->update_thread_list (); |
c906108c SS |
3279 | } |
3280 | ||
d914c394 SS |
3281 | void |
3282 | target_stop (ptid_t ptid) | |
3283 | { | |
3284 | if (!may_stop) | |
3285 | { | |
3286 | warning (_("May not interrupt or stop the target, ignoring attempt")); | |
3287 | return; | |
3288 | } | |
3289 | ||
8b88a78e | 3290 | current_top_target ()->stop (ptid); |
d914c394 SS |
3291 | } |
3292 | ||
bfedc46a | 3293 | void |
e671cd59 | 3294 | target_interrupt () |
bfedc46a PA |
3295 | { |
3296 | if (!may_stop) | |
3297 | { | |
3298 | warning (_("May not interrupt or stop the target, ignoring attempt")); | |
3299 | return; | |
3300 | } | |
3301 | ||
8b88a78e | 3302 | current_top_target ()->interrupt (); |
bfedc46a PA |
3303 | } |
3304 | ||
abc56d60 PA |
3305 | /* See target.h. */ |
3306 | ||
93692b58 PA |
3307 | void |
3308 | target_pass_ctrlc (void) | |
3309 | { | |
8b88a78e | 3310 | current_top_target ()->pass_ctrlc (); |
93692b58 PA |
3311 | } |
3312 | ||
3313 | /* See target.h. */ | |
3314 | ||
3315 | void | |
3316 | default_target_pass_ctrlc (struct target_ops *ops) | |
3317 | { | |
e671cd59 | 3318 | target_interrupt (); |
93692b58 PA |
3319 | } |
3320 | ||
f8c1d06b GB |
3321 | /* See target/target.h. */ |
3322 | ||
3323 | void | |
03f4463b | 3324 | target_stop_and_wait (ptid_t ptid) |
f8c1d06b GB |
3325 | { |
3326 | struct target_waitstatus status; | |
3327 | int was_non_stop = non_stop; | |
3328 | ||
3329 | non_stop = 1; | |
3330 | target_stop (ptid); | |
3331 | ||
3332 | memset (&status, 0, sizeof (status)); | |
3333 | target_wait (ptid, &status, 0); | |
3334 | ||
3335 | non_stop = was_non_stop; | |
3336 | } | |
3337 | ||
3338 | /* See target/target.h. */ | |
3339 | ||
3340 | void | |
03f4463b | 3341 | target_continue_no_signal (ptid_t ptid) |
f8c1d06b GB |
3342 | { |
3343 | target_resume (ptid, 0, GDB_SIGNAL_0); | |
3344 | } | |
3345 | ||
049a8570 SDJ |
3346 | /* See target/target.h. */ |
3347 | ||
3348 | void | |
3349 | target_continue (ptid_t ptid, enum gdb_signal signal) | |
3350 | { | |
3351 | target_resume (ptid, 0, signal); | |
3352 | } | |
3353 | ||
fdbac7d8 | 3354 | /* Concatenate ELEM to LIST, a comma-separated list. */ |
09826ec5 | 3355 | |
09ce46f2 SM |
3356 | static void |
3357 | str_comma_list_concat_elem (std::string *list, const char *elem) | |
09826ec5 | 3358 | { |
09ce46f2 SM |
3359 | if (!list->empty ()) |
3360 | list->append (", "); | |
3361 | ||
3362 | list->append (elem); | |
09826ec5 PA |
3363 | } |
3364 | ||
3365 | /* Helper for target_options_to_string. If OPT is present in | |
3366 | TARGET_OPTIONS, append the OPT_STR (string version of OPT) in RET. | |
09ce46f2 | 3367 | OPT is removed from TARGET_OPTIONS. */ |
09826ec5 | 3368 | |
09ce46f2 SM |
3369 | static void |
3370 | do_option (int *target_options, std::string *ret, | |
a121b7c1 | 3371 | int opt, const char *opt_str) |
09826ec5 PA |
3372 | { |
3373 | if ((*target_options & opt) != 0) | |
3374 | { | |
09ce46f2 | 3375 | str_comma_list_concat_elem (ret, opt_str); |
09826ec5 PA |
3376 | *target_options &= ~opt; |
3377 | } | |
09826ec5 PA |
3378 | } |
3379 | ||
fdbac7d8 SM |
3380 | /* See target.h. */ |
3381 | ||
09ce46f2 | 3382 | std::string |
09826ec5 PA |
3383 | target_options_to_string (int target_options) |
3384 | { | |
09ce46f2 | 3385 | std::string ret; |
09826ec5 PA |
3386 | |
3387 | #define DO_TARG_OPTION(OPT) \ | |
09ce46f2 | 3388 | do_option (&target_options, &ret, OPT, #OPT) |
09826ec5 PA |
3389 | |
3390 | DO_TARG_OPTION (TARGET_WNOHANG); | |
3391 | ||
3392 | if (target_options != 0) | |
09ce46f2 | 3393 | str_comma_list_concat_elem (&ret, "unknown???"); |
09826ec5 | 3394 | |
09826ec5 PA |
3395 | return ret; |
3396 | } | |
3397 | ||
28439f5e PA |
3398 | void |
3399 | target_fetch_registers (struct regcache *regcache, int regno) | |
c906108c | 3400 | { |
8b88a78e | 3401 | current_top_target ()->fetch_registers (regcache, regno); |
ad5989bd | 3402 | if (targetdebug) |
ef79d9a3 | 3403 | regcache->debug_print_register ("target_fetch_registers", regno); |
c906108c SS |
3404 | } |
3405 | ||
28439f5e PA |
3406 | void |
3407 | target_store_registers (struct regcache *regcache, int regno) | |
c906108c | 3408 | { |
d914c394 SS |
3409 | if (!may_write_registers) |
3410 | error (_("Writing to registers is not allowed (regno %d)"), regno); | |
3411 | ||
8b88a78e | 3412 | current_top_target ()->store_registers (regcache, regno); |
6b84065d | 3413 | if (targetdebug) |
28439f5e | 3414 | { |
ef79d9a3 | 3415 | regcache->debug_print_register ("target_store_registers", regno); |
28439f5e | 3416 | } |
c906108c SS |
3417 | } |
3418 | ||
dc146f7c VP |
3419 | int |
3420 | target_core_of_thread (ptid_t ptid) | |
3421 | { | |
8b88a78e | 3422 | return current_top_target ()->core_of_thread (ptid); |
dc146f7c VP |
3423 | } |
3424 | ||
936d2992 PA |
3425 | int |
3426 | simple_verify_memory (struct target_ops *ops, | |
3427 | const gdb_byte *data, CORE_ADDR lma, ULONGEST size) | |
3428 | { | |
3429 | LONGEST total_xfered = 0; | |
3430 | ||
3431 | while (total_xfered < size) | |
3432 | { | |
3433 | ULONGEST xfered_len; | |
3434 | enum target_xfer_status status; | |
3435 | gdb_byte buf[1024]; | |
768adc05 | 3436 | ULONGEST howmuch = std::min<ULONGEST> (sizeof (buf), size - total_xfered); |
936d2992 PA |
3437 | |
3438 | status = target_xfer_partial (ops, TARGET_OBJECT_MEMORY, NULL, | |
3439 | buf, NULL, lma + total_xfered, howmuch, | |
3440 | &xfered_len); | |
3441 | if (status == TARGET_XFER_OK | |
3442 | && memcmp (data + total_xfered, buf, xfered_len) == 0) | |
3443 | { | |
3444 | total_xfered += xfered_len; | |
3445 | QUIT; | |
3446 | } | |
3447 | else | |
3448 | return 0; | |
3449 | } | |
3450 | return 1; | |
3451 | } | |
3452 | ||
3453 | /* Default implementation of memory verification. */ | |
3454 | ||
3455 | static int | |
3456 | default_verify_memory (struct target_ops *self, | |
3457 | const gdb_byte *data, CORE_ADDR memaddr, ULONGEST size) | |
3458 | { | |
3459 | /* Start over from the top of the target stack. */ | |
8b88a78e | 3460 | return simple_verify_memory (current_top_target (), |
936d2992 PA |
3461 | data, memaddr, size); |
3462 | } | |
3463 | ||
4a5e7a5b PA |
3464 | int |
3465 | target_verify_memory (const gdb_byte *data, CORE_ADDR memaddr, ULONGEST size) | |
3466 | { | |
8b88a78e | 3467 | return current_top_target ()->verify_memory (data, memaddr, size); |
4a5e7a5b PA |
3468 | } |
3469 | ||
9c06b0b4 TJB |
3470 | /* The documentation for this function is in its prototype declaration in |
3471 | target.h. */ | |
3472 | ||
3473 | int | |
f4b0a671 SM |
3474 | target_insert_mask_watchpoint (CORE_ADDR addr, CORE_ADDR mask, |
3475 | enum target_hw_bp_type rw) | |
9c06b0b4 | 3476 | { |
8b88a78e | 3477 | return current_top_target ()->insert_mask_watchpoint (addr, mask, rw); |
9c06b0b4 TJB |
3478 | } |
3479 | ||
3480 | /* The documentation for this function is in its prototype declaration in | |
3481 | target.h. */ | |
3482 | ||
3483 | int | |
f4b0a671 SM |
3484 | target_remove_mask_watchpoint (CORE_ADDR addr, CORE_ADDR mask, |
3485 | enum target_hw_bp_type rw) | |
9c06b0b4 | 3486 | { |
8b88a78e | 3487 | return current_top_target ()->remove_mask_watchpoint (addr, mask, rw); |
9c06b0b4 TJB |
3488 | } |
3489 | ||
3490 | /* The documentation for this function is in its prototype declaration | |
3491 | in target.h. */ | |
3492 | ||
3493 | int | |
3494 | target_masked_watch_num_registers (CORE_ADDR addr, CORE_ADDR mask) | |
3495 | { | |
8b88a78e | 3496 | return current_top_target ()->masked_watch_num_registers (addr, mask); |
9c06b0b4 TJB |
3497 | } |
3498 | ||
f1310107 TJB |
3499 | /* The documentation for this function is in its prototype declaration |
3500 | in target.h. */ | |
3501 | ||
3502 | int | |
3503 | target_ranged_break_num_registers (void) | |
3504 | { | |
8b88a78e | 3505 | return current_top_target ()->ranged_break_num_registers (); |
f1310107 TJB |
3506 | } |
3507 | ||
02d27625 MM |
3508 | /* See target.h. */ |
3509 | ||
02d27625 | 3510 | struct btrace_target_info * |
f4abbc16 | 3511 | target_enable_btrace (ptid_t ptid, const struct btrace_config *conf) |
02d27625 | 3512 | { |
8b88a78e | 3513 | return current_top_target ()->enable_btrace (ptid, conf); |
02d27625 MM |
3514 | } |
3515 | ||
3516 | /* See target.h. */ | |
3517 | ||
3518 | void | |
3519 | target_disable_btrace (struct btrace_target_info *btinfo) | |
3520 | { | |
8b88a78e | 3521 | current_top_target ()->disable_btrace (btinfo); |
02d27625 MM |
3522 | } |
3523 | ||
3524 | /* See target.h. */ | |
3525 | ||
3526 | void | |
3527 | target_teardown_btrace (struct btrace_target_info *btinfo) | |
3528 | { | |
8b88a78e | 3529 | current_top_target ()->teardown_btrace (btinfo); |
02d27625 MM |
3530 | } |
3531 | ||
3532 | /* See target.h. */ | |
3533 | ||
969c39fb | 3534 | enum btrace_error |
734b0e4b | 3535 | target_read_btrace (struct btrace_data *btrace, |
969c39fb | 3536 | struct btrace_target_info *btinfo, |
02d27625 MM |
3537 | enum btrace_read_type type) |
3538 | { | |
8b88a78e | 3539 | return current_top_target ()->read_btrace (btrace, btinfo, type); |
02d27625 MM |
3540 | } |
3541 | ||
d02ed0bb MM |
3542 | /* See target.h. */ |
3543 | ||
f4abbc16 MM |
3544 | const struct btrace_config * |
3545 | target_btrace_conf (const struct btrace_target_info *btinfo) | |
3546 | { | |
8b88a78e | 3547 | return current_top_target ()->btrace_conf (btinfo); |
f4abbc16 MM |
3548 | } |
3549 | ||
3550 | /* See target.h. */ | |
3551 | ||
7c1687a9 MM |
3552 | void |
3553 | target_stop_recording (void) | |
3554 | { | |
8b88a78e | 3555 | current_top_target ()->stop_recording (); |
7c1687a9 MM |
3556 | } |
3557 | ||
3558 | /* See target.h. */ | |
3559 | ||
d02ed0bb | 3560 | void |
85e1311a | 3561 | target_save_record (const char *filename) |
d02ed0bb | 3562 | { |
8b88a78e | 3563 | current_top_target ()->save_record (filename); |
d02ed0bb MM |
3564 | } |
3565 | ||
3566 | /* See target.h. */ | |
3567 | ||
3568 | int | |
f6ac5f3d | 3569 | target_supports_delete_record () |
d02ed0bb | 3570 | { |
8b88a78e | 3571 | return current_top_target ()->supports_delete_record (); |
d02ed0bb MM |
3572 | } |
3573 | ||
3574 | /* See target.h. */ | |
3575 | ||
3576 | void | |
3577 | target_delete_record (void) | |
3578 | { | |
8b88a78e | 3579 | current_top_target ()->delete_record (); |
d02ed0bb MM |
3580 | } |
3581 | ||
3582 | /* See target.h. */ | |
3583 | ||
b158a20f TW |
3584 | enum record_method |
3585 | target_record_method (ptid_t ptid) | |
3586 | { | |
8b88a78e | 3587 | return current_top_target ()->record_method (ptid); |
b158a20f TW |
3588 | } |
3589 | ||
3590 | /* See target.h. */ | |
3591 | ||
d02ed0bb | 3592 | int |
a52eab48 | 3593 | target_record_is_replaying (ptid_t ptid) |
d02ed0bb | 3594 | { |
8b88a78e | 3595 | return current_top_target ()->record_is_replaying (ptid); |
d02ed0bb MM |
3596 | } |
3597 | ||
3598 | /* See target.h. */ | |
3599 | ||
7ff27e9b MM |
3600 | int |
3601 | target_record_will_replay (ptid_t ptid, int dir) | |
3602 | { | |
8b88a78e | 3603 | return current_top_target ()->record_will_replay (ptid, dir); |
7ff27e9b MM |
3604 | } |
3605 | ||
3606 | /* See target.h. */ | |
3607 | ||
797094dd MM |
3608 | void |
3609 | target_record_stop_replaying (void) | |
3610 | { | |
8b88a78e | 3611 | current_top_target ()->record_stop_replaying (); |
797094dd MM |
3612 | } |
3613 | ||
3614 | /* See target.h. */ | |
3615 | ||
d02ed0bb MM |
3616 | void |
3617 | target_goto_record_begin (void) | |
3618 | { | |
8b88a78e | 3619 | current_top_target ()->goto_record_begin (); |
d02ed0bb MM |
3620 | } |
3621 | ||
3622 | /* See target.h. */ | |
3623 | ||
3624 | void | |
3625 | target_goto_record_end (void) | |
3626 | { | |
8b88a78e | 3627 | current_top_target ()->goto_record_end (); |
d02ed0bb MM |
3628 | } |
3629 | ||
3630 | /* See target.h. */ | |
3631 | ||
3632 | void | |
3633 | target_goto_record (ULONGEST insn) | |
3634 | { | |
8b88a78e | 3635 | current_top_target ()->goto_record (insn); |
d02ed0bb MM |
3636 | } |
3637 | ||
67c86d06 MM |
3638 | /* See target.h. */ |
3639 | ||
3640 | void | |
9a24775b | 3641 | target_insn_history (int size, gdb_disassembly_flags flags) |
67c86d06 | 3642 | { |
8b88a78e | 3643 | current_top_target ()->insn_history (size, flags); |
67c86d06 MM |
3644 | } |
3645 | ||
3646 | /* See target.h. */ | |
3647 | ||
3648 | void | |
9a24775b PA |
3649 | target_insn_history_from (ULONGEST from, int size, |
3650 | gdb_disassembly_flags flags) | |
67c86d06 | 3651 | { |
8b88a78e | 3652 | current_top_target ()->insn_history_from (from, size, flags); |
67c86d06 MM |
3653 | } |
3654 | ||
3655 | /* See target.h. */ | |
3656 | ||
3657 | void | |
9a24775b PA |
3658 | target_insn_history_range (ULONGEST begin, ULONGEST end, |
3659 | gdb_disassembly_flags flags) | |
67c86d06 | 3660 | { |
8b88a78e | 3661 | current_top_target ()->insn_history_range (begin, end, flags); |
67c86d06 MM |
3662 | } |
3663 | ||
15984c13 MM |
3664 | /* See target.h. */ |
3665 | ||
3666 | void | |
0cb7c7b0 | 3667 | target_call_history (int size, record_print_flags flags) |
15984c13 | 3668 | { |
8b88a78e | 3669 | current_top_target ()->call_history (size, flags); |
15984c13 MM |
3670 | } |
3671 | ||
3672 | /* See target.h. */ | |
3673 | ||
3674 | void | |
0cb7c7b0 | 3675 | target_call_history_from (ULONGEST begin, int size, record_print_flags flags) |
15984c13 | 3676 | { |
8b88a78e | 3677 | current_top_target ()->call_history_from (begin, size, flags); |
15984c13 MM |
3678 | } |
3679 | ||
3680 | /* See target.h. */ | |
3681 | ||
3682 | void | |
0cb7c7b0 | 3683 | target_call_history_range (ULONGEST begin, ULONGEST end, record_print_flags flags) |
15984c13 | 3684 | { |
8b88a78e | 3685 | current_top_target ()->call_history_range (begin, end, flags); |
15984c13 MM |
3686 | } |
3687 | ||
ea001bdc MM |
3688 | /* See target.h. */ |
3689 | ||
3690 | const struct frame_unwind * | |
3691 | target_get_unwinder (void) | |
3692 | { | |
8b88a78e | 3693 | return current_top_target ()->get_unwinder (); |
ea001bdc MM |
3694 | } |
3695 | ||
3696 | /* See target.h. */ | |
3697 | ||
3698 | const struct frame_unwind * | |
3699 | target_get_tailcall_unwinder (void) | |
3700 | { | |
8b88a78e | 3701 | return current_top_target ()->get_tailcall_unwinder (); |
ea001bdc MM |
3702 | } |
3703 | ||
5fff78c4 MM |
3704 | /* See target.h. */ |
3705 | ||
3706 | void | |
3707 | target_prepare_to_generate_core (void) | |
3708 | { | |
8b88a78e | 3709 | current_top_target ()->prepare_to_generate_core (); |
5fff78c4 MM |
3710 | } |
3711 | ||
3712 | /* See target.h. */ | |
3713 | ||
3714 | void | |
3715 | target_done_generating_core (void) | |
3716 | { | |
8b88a78e | 3717 | current_top_target ()->done_generating_core (); |
5fff78c4 MM |
3718 | } |
3719 | ||
c906108c | 3720 | \f |
c5aa993b JM |
3721 | |
3722 | static char targ_desc[] = | |
3e43a32a MS |
3723 | "Names of targets and files being debugged.\nShows the entire \ |
3724 | stack of targets currently in use (including the exec-file,\n\ | |
c906108c SS |
3725 | core-file, and process, if any), as well as the symbol file name."; |
3726 | ||
a53f3625 | 3727 | static void |
a30bf1f1 TT |
3728 | default_rcmd (struct target_ops *self, const char *command, |
3729 | struct ui_file *output) | |
a53f3625 TT |
3730 | { |
3731 | error (_("\"monitor\" command not supported by this target.")); | |
3732 | } | |
3733 | ||
96baa820 | 3734 | static void |
0b39b52e | 3735 | do_monitor_command (const char *cmd, int from_tty) |
96baa820 | 3736 | { |
96baa820 JM |
3737 | target_rcmd (cmd, gdb_stdtarg); |
3738 | } | |
3739 | ||
78cbbba8 LM |
3740 | /* Erases all the memory regions marked as flash. CMD and FROM_TTY are |
3741 | ignored. */ | |
3742 | ||
3743 | void | |
0b39b52e | 3744 | flash_erase_command (const char *cmd, int from_tty) |
78cbbba8 LM |
3745 | { |
3746 | /* Used to communicate termination of flash operations to the target. */ | |
3747 | bool found_flash_region = false; | |
78cbbba8 LM |
3748 | struct gdbarch *gdbarch = target_gdbarch (); |
3749 | ||
a664f67e | 3750 | std::vector<mem_region> mem_regions = target_memory_map (); |
78cbbba8 LM |
3751 | |
3752 | /* Iterate over all memory regions. */ | |
a664f67e | 3753 | for (const mem_region &m : mem_regions) |
78cbbba8 | 3754 | { |
78cbbba8 | 3755 | /* Is this a flash memory region? */ |
a664f67e | 3756 | if (m.attrib.mode == MEM_FLASH) |
78cbbba8 LM |
3757 | { |
3758 | found_flash_region = true; | |
a664f67e | 3759 | target_flash_erase (m.lo, m.hi - m.lo); |
78cbbba8 | 3760 | |
76f9c9cf | 3761 | ui_out_emit_tuple tuple_emitter (current_uiout, "erased-regions"); |
78cbbba8 LM |
3762 | |
3763 | current_uiout->message (_("Erasing flash memory region at address ")); | |
a664f67e | 3764 | current_uiout->field_fmt ("address", "%s", paddress (gdbarch, m.lo)); |
78cbbba8 | 3765 | current_uiout->message (", size = "); |
a664f67e | 3766 | current_uiout->field_fmt ("size", "%s", hex_string (m.hi - m.lo)); |
78cbbba8 | 3767 | current_uiout->message ("\n"); |
78cbbba8 LM |
3768 | } |
3769 | } | |
3770 | ||
3771 | /* Did we do any flash operations? If so, we need to finalize them. */ | |
3772 | if (found_flash_region) | |
3773 | target_flash_done (); | |
3774 | else | |
3775 | current_uiout->message (_("No flash memory regions found.\n")); | |
3776 | } | |
3777 | ||
87680a14 JB |
3778 | /* Print the name of each layers of our target stack. */ |
3779 | ||
3780 | static void | |
d3cb6b99 | 3781 | maintenance_print_target_stack (const char *cmd, int from_tty) |
87680a14 | 3782 | { |
87680a14 JB |
3783 | printf_filtered (_("The current target stack is:\n")); |
3784 | ||
b6a8c27b | 3785 | for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
87680a14 | 3786 | { |
66b4deae | 3787 | if (t->stratum () == debug_stratum) |
f6ac5f3d PA |
3788 | continue; |
3789 | printf_filtered (" - %s (%s)\n", t->shortname (), t->longname ()); | |
87680a14 JB |
3790 | } |
3791 | } | |
3792 | ||
372316f1 PA |
3793 | /* See target.h. */ |
3794 | ||
3795 | void | |
3796 | target_async (int enable) | |
3797 | { | |
3798 | infrun_async (enable); | |
8b88a78e | 3799 | current_top_target ()->async (enable); |
372316f1 PA |
3800 | } |
3801 | ||
65706a29 PA |
3802 | /* See target.h. */ |
3803 | ||
3804 | void | |
3805 | target_thread_events (int enable) | |
3806 | { | |
8b88a78e | 3807 | current_top_target ()->thread_events (enable); |
65706a29 PA |
3808 | } |
3809 | ||
329ea579 PA |
3810 | /* Controls if targets can report that they can/are async. This is |
3811 | just for maintainers to use when debugging gdb. */ | |
3812 | int target_async_permitted = 1; | |
c6ebd6cf VP |
3813 | |
3814 | /* The set command writes to this variable. If the inferior is | |
b5419e49 | 3815 | executing, target_async_permitted is *not* updated. */ |
329ea579 | 3816 | static int target_async_permitted_1 = 1; |
c6ebd6cf VP |
3817 | |
3818 | static void | |
eb4c3f4a | 3819 | maint_set_target_async_command (const char *args, int from_tty, |
329ea579 | 3820 | struct cmd_list_element *c) |
c6ebd6cf | 3821 | { |
c35b1492 | 3822 | if (have_live_inferiors ()) |
c6ebd6cf VP |
3823 | { |
3824 | target_async_permitted_1 = target_async_permitted; | |
3825 | error (_("Cannot change this setting while the inferior is running.")); | |
3826 | } | |
3827 | ||
3828 | target_async_permitted = target_async_permitted_1; | |
3829 | } | |
3830 | ||
3831 | static void | |
329ea579 PA |
3832 | maint_show_target_async_command (struct ui_file *file, int from_tty, |
3833 | struct cmd_list_element *c, | |
3834 | const char *value) | |
c6ebd6cf | 3835 | { |
3e43a32a MS |
3836 | fprintf_filtered (file, |
3837 | _("Controlling the inferior in " | |
3838 | "asynchronous mode is %s.\n"), value); | |
c6ebd6cf VP |
3839 | } |
3840 | ||
fbea99ea PA |
3841 | /* Return true if the target operates in non-stop mode even with "set |
3842 | non-stop off". */ | |
3843 | ||
3844 | static int | |
3845 | target_always_non_stop_p (void) | |
3846 | { | |
8b88a78e | 3847 | return current_top_target ()->always_non_stop_p (); |
fbea99ea PA |
3848 | } |
3849 | ||
3850 | /* See target.h. */ | |
3851 | ||
3852 | int | |
3853 | target_is_non_stop_p (void) | |
3854 | { | |
3855 | return (non_stop | |
3856 | || target_non_stop_enabled == AUTO_BOOLEAN_TRUE | |
3857 | || (target_non_stop_enabled == AUTO_BOOLEAN_AUTO | |
3858 | && target_always_non_stop_p ())); | |
3859 | } | |
3860 | ||
3861 | /* Controls if targets can report that they always run in non-stop | |
3862 | mode. This is just for maintainers to use when debugging gdb. */ | |
3863 | enum auto_boolean target_non_stop_enabled = AUTO_BOOLEAN_AUTO; | |
3864 | ||
3865 | /* The set command writes to this variable. If the inferior is | |
3866 | executing, target_non_stop_enabled is *not* updated. */ | |
3867 | static enum auto_boolean target_non_stop_enabled_1 = AUTO_BOOLEAN_AUTO; | |
3868 | ||
3869 | /* Implementation of "maint set target-non-stop". */ | |
3870 | ||
3871 | static void | |
eb4c3f4a | 3872 | maint_set_target_non_stop_command (const char *args, int from_tty, |
fbea99ea PA |
3873 | struct cmd_list_element *c) |
3874 | { | |
3875 | if (have_live_inferiors ()) | |
3876 | { | |
3877 | target_non_stop_enabled_1 = target_non_stop_enabled; | |
3878 | error (_("Cannot change this setting while the inferior is running.")); | |
3879 | } | |
3880 | ||
3881 | target_non_stop_enabled = target_non_stop_enabled_1; | |
3882 | } | |
3883 | ||
3884 | /* Implementation of "maint show target-non-stop". */ | |
3885 | ||
3886 | static void | |
3887 | maint_show_target_non_stop_command (struct ui_file *file, int from_tty, | |
3888 | struct cmd_list_element *c, | |
3889 | const char *value) | |
3890 | { | |
3891 | if (target_non_stop_enabled == AUTO_BOOLEAN_AUTO) | |
3892 | fprintf_filtered (file, | |
3893 | _("Whether the target is always in non-stop mode " | |
3894 | "is %s (currently %s).\n"), value, | |
3895 | target_always_non_stop_p () ? "on" : "off"); | |
3896 | else | |
3897 | fprintf_filtered (file, | |
3898 | _("Whether the target is always in non-stop mode " | |
3899 | "is %s.\n"), value); | |
3900 | } | |
3901 | ||
d914c394 SS |
3902 | /* Temporary copies of permission settings. */ |
3903 | ||
3904 | static int may_write_registers_1 = 1; | |
3905 | static int may_write_memory_1 = 1; | |
3906 | static int may_insert_breakpoints_1 = 1; | |
3907 | static int may_insert_tracepoints_1 = 1; | |
3908 | static int may_insert_fast_tracepoints_1 = 1; | |
3909 | static int may_stop_1 = 1; | |
3910 | ||
3911 | /* Make the user-set values match the real values again. */ | |
3912 | ||
3913 | void | |
3914 | update_target_permissions (void) | |
3915 | { | |
3916 | may_write_registers_1 = may_write_registers; | |
3917 | may_write_memory_1 = may_write_memory; | |
3918 | may_insert_breakpoints_1 = may_insert_breakpoints; | |
3919 | may_insert_tracepoints_1 = may_insert_tracepoints; | |
3920 | may_insert_fast_tracepoints_1 = may_insert_fast_tracepoints; | |
3921 | may_stop_1 = may_stop; | |
3922 | } | |
3923 | ||
3924 | /* The one function handles (most of) the permission flags in the same | |
3925 | way. */ | |
3926 | ||
3927 | static void | |
eb4c3f4a | 3928 | set_target_permissions (const char *args, int from_tty, |
d914c394 SS |
3929 | struct cmd_list_element *c) |
3930 | { | |
3931 | if (target_has_execution) | |
3932 | { | |
3933 | update_target_permissions (); | |
3934 | error (_("Cannot change this setting while the inferior is running.")); | |
3935 | } | |
3936 | ||
3937 | /* Make the real values match the user-changed values. */ | |
3938 | may_write_registers = may_write_registers_1; | |
3939 | may_insert_breakpoints = may_insert_breakpoints_1; | |
3940 | may_insert_tracepoints = may_insert_tracepoints_1; | |
3941 | may_insert_fast_tracepoints = may_insert_fast_tracepoints_1; | |
3942 | may_stop = may_stop_1; | |
3943 | update_observer_mode (); | |
3944 | } | |
3945 | ||
3946 | /* Set memory write permission independently of observer mode. */ | |
3947 | ||
3948 | static void | |
eb4c3f4a | 3949 | set_write_memory_permission (const char *args, int from_tty, |
d914c394 SS |
3950 | struct cmd_list_element *c) |
3951 | { | |
3952 | /* Make the real values match the user-changed values. */ | |
3953 | may_write_memory = may_write_memory_1; | |
3954 | update_observer_mode (); | |
3955 | } | |
3956 | ||
c906108c | 3957 | void |
fba45db2 | 3958 | initialize_targets (void) |
c906108c | 3959 | { |
f6ac5f3d PA |
3960 | the_dummy_target = new dummy_target (); |
3961 | push_target (the_dummy_target); | |
3962 | ||
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 | } |