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 | 108 | |
06b5b831 | 109 | /* The singleton debug target. */ |
c906108c | 110 | |
f6ac5f3d | 111 | static struct target_ops *the_debug_target; |
c906108c | 112 | |
a1740ee1 PA |
113 | /* The target stack. */ |
114 | ||
115 | static target_stack g_target_stack; | |
116 | ||
c906108c | 117 | /* Top of target stack. */ |
c906108c SS |
118 | /* The target structure we are currently using to talk to a process |
119 | or file or whatever "inferior" we have. */ | |
120 | ||
8b88a78e PA |
121 | target_ops * |
122 | current_top_target () | |
123 | { | |
a1740ee1 | 124 | return g_target_stack.top (); |
8b88a78e | 125 | } |
c906108c SS |
126 | |
127 | /* Command list for target. */ | |
128 | ||
129 | static struct cmd_list_element *targetlist = NULL; | |
130 | ||
cf7a04e8 DJ |
131 | /* Nonzero if we should trust readonly sections from the |
132 | executable when reading memory. */ | |
133 | ||
134 | static int trust_readonly = 0; | |
135 | ||
8defab1a DJ |
136 | /* Nonzero if we should show true memory content including |
137 | memory breakpoint inserted by gdb. */ | |
138 | ||
139 | static int show_memory_breakpoints = 0; | |
140 | ||
d914c394 SS |
141 | /* These globals control whether GDB attempts to perform these |
142 | operations; they are useful for targets that need to prevent | |
143 | inadvertant disruption, such as in non-stop mode. */ | |
144 | ||
145 | int may_write_registers = 1; | |
146 | ||
147 | int may_write_memory = 1; | |
148 | ||
149 | int may_insert_breakpoints = 1; | |
150 | ||
151 | int may_insert_tracepoints = 1; | |
152 | ||
153 | int may_insert_fast_tracepoints = 1; | |
154 | ||
155 | int may_stop = 1; | |
156 | ||
c906108c SS |
157 | /* Non-zero if we want to see trace of target level stuff. */ |
158 | ||
ccce17b0 | 159 | static unsigned int targetdebug = 0; |
3cecbbbe TT |
160 | |
161 | static void | |
eb4c3f4a | 162 | set_targetdebug (const char *args, int from_tty, struct cmd_list_element *c) |
3cecbbbe | 163 | { |
f6ac5f3d PA |
164 | if (targetdebug) |
165 | push_target (the_debug_target); | |
166 | else | |
167 | unpush_target (the_debug_target); | |
3cecbbbe TT |
168 | } |
169 | ||
920d2a44 AC |
170 | static void |
171 | show_targetdebug (struct ui_file *file, int from_tty, | |
172 | struct cmd_list_element *c, const char *value) | |
173 | { | |
174 | fprintf_filtered (file, _("Target debugging is %s.\n"), value); | |
175 | } | |
c906108c | 176 | |
c906108c SS |
177 | /* The user just typed 'target' without the name of a target. */ |
178 | ||
c906108c | 179 | static void |
981a3fb3 | 180 | target_command (const char *arg, int from_tty) |
c906108c SS |
181 | { |
182 | fputs_filtered ("Argument required (target name). Try `help target'\n", | |
183 | gdb_stdout); | |
184 | } | |
185 | ||
c35b1492 PA |
186 | int |
187 | target_has_all_memory_1 (void) | |
188 | { | |
b6a8c27b | 189 | for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
f6ac5f3d | 190 | if (t->has_all_memory ()) |
c35b1492 PA |
191 | return 1; |
192 | ||
193 | return 0; | |
194 | } | |
195 | ||
196 | int | |
197 | target_has_memory_1 (void) | |
198 | { | |
b6a8c27b | 199 | for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
f6ac5f3d | 200 | if (t->has_memory ()) |
c35b1492 PA |
201 | return 1; |
202 | ||
203 | return 0; | |
204 | } | |
205 | ||
206 | int | |
207 | target_has_stack_1 (void) | |
208 | { | |
b6a8c27b | 209 | for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
f6ac5f3d | 210 | if (t->has_stack ()) |
c35b1492 PA |
211 | return 1; |
212 | ||
213 | return 0; | |
214 | } | |
215 | ||
216 | int | |
217 | target_has_registers_1 (void) | |
218 | { | |
b6a8c27b | 219 | for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
f6ac5f3d | 220 | if (t->has_registers ()) |
c35b1492 PA |
221 | return 1; |
222 | ||
223 | return 0; | |
224 | } | |
225 | ||
226 | int | |
aeaec162 | 227 | target_has_execution_1 (ptid_t the_ptid) |
c35b1492 | 228 | { |
b6a8c27b | 229 | for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
f6ac5f3d | 230 | if (t->has_execution (the_ptid)) |
c35b1492 PA |
231 | return 1; |
232 | ||
233 | return 0; | |
234 | } | |
235 | ||
aeaec162 TT |
236 | int |
237 | target_has_execution_current (void) | |
238 | { | |
239 | return target_has_execution_1 (inferior_ptid); | |
240 | } | |
241 | ||
8981c758 TT |
242 | /* This is used to implement the various target commands. */ |
243 | ||
244 | static void | |
eb4c3f4a | 245 | open_target (const char *args, int from_tty, struct cmd_list_element *command) |
8981c758 | 246 | { |
d9f719f1 PA |
247 | auto *ti = static_cast<target_info *> (get_cmd_context (command)); |
248 | target_open_ftype *func = target_factories[ti]; | |
8981c758 TT |
249 | |
250 | if (targetdebug) | |
d9f719f1 PA |
251 | fprintf_unfiltered (gdb_stdlog, "-> %s->open (...)\n", |
252 | ti->shortname); | |
8981c758 | 253 | |
d9f719f1 | 254 | func (args, from_tty); |
8981c758 TT |
255 | |
256 | if (targetdebug) | |
d9f719f1 PA |
257 | fprintf_unfiltered (gdb_stdlog, "<- %s->open (%s, %d)\n", |
258 | ti->shortname, args, from_tty); | |
8981c758 TT |
259 | } |
260 | ||
d9f719f1 | 261 | /* See target.h. */ |
c22a2b88 TT |
262 | |
263 | void | |
d9f719f1 PA |
264 | add_target (const target_info &t, target_open_ftype *func, |
265 | completer_ftype *completer) | |
c22a2b88 TT |
266 | { |
267 | struct cmd_list_element *c; | |
268 | ||
d9f719f1 PA |
269 | auto &func_slot = target_factories[&t]; |
270 | if (func_slot != nullptr) | |
271 | internal_error (__FILE__, __LINE__, | |
272 | _("target already added (\"%s\")."), t.shortname); | |
273 | func_slot = func; | |
c906108c SS |
274 | |
275 | if (targetlist == NULL) | |
1bedd215 AC |
276 | add_prefix_cmd ("target", class_run, target_command, _("\ |
277 | Connect to a target machine or process.\n\ | |
c906108c SS |
278 | The first argument is the type or protocol of the target machine.\n\ |
279 | Remaining arguments are interpreted by the target protocol. For more\n\ | |
280 | information on the arguments for a particular protocol, type\n\ | |
1bedd215 | 281 | `help target ' followed by the protocol name."), |
c906108c | 282 | &targetlist, "target ", 0, &cmdlist); |
d9f719f1 PA |
283 | c = add_cmd (t.shortname, no_class, t.doc, &targetlist); |
284 | set_cmd_context (c, (void *) &t); | |
8981c758 | 285 | set_cmd_sfunc (c, open_target); |
9852c492 YQ |
286 | if (completer != NULL) |
287 | set_cmd_completer (c, completer); | |
288 | } | |
289 | ||
b48d48eb MM |
290 | /* See target.h. */ |
291 | ||
292 | void | |
d9f719f1 | 293 | add_deprecated_target_alias (const target_info &tinfo, const char *alias) |
b48d48eb MM |
294 | { |
295 | struct cmd_list_element *c; | |
296 | char *alt; | |
297 | ||
298 | /* If we use add_alias_cmd, here, we do not get the deprecated warning, | |
299 | see PR cli/15104. */ | |
d9f719f1 | 300 | c = add_cmd (alias, no_class, tinfo.doc, &targetlist); |
8981c758 | 301 | set_cmd_sfunc (c, open_target); |
d9f719f1 PA |
302 | set_cmd_context (c, (void *) &tinfo); |
303 | alt = xstrprintf ("target %s", tinfo.shortname); | |
b48d48eb MM |
304 | deprecate_cmd (c, alt); |
305 | } | |
306 | ||
c906108c SS |
307 | /* Stub functions */ |
308 | ||
7d85a9c0 JB |
309 | void |
310 | target_kill (void) | |
311 | { | |
8b88a78e | 312 | current_top_target ()->kill (); |
7d85a9c0 JB |
313 | } |
314 | ||
11cf8741 | 315 | void |
9cbe5fff | 316 | target_load (const char *arg, int from_tty) |
11cf8741 | 317 | { |
4e5d721f | 318 | target_dcache_invalidate (); |
8b88a78e | 319 | current_top_target ()->load (arg, from_tty); |
11cf8741 JM |
320 | } |
321 | ||
223ffa71 | 322 | /* Define it. */ |
5842f62a | 323 | |
e671cd59 PA |
324 | target_terminal_state target_terminal::m_terminal_state |
325 | = target_terminal_state::is_ours; | |
5842f62a | 326 | |
223ffa71 | 327 | /* See target/target.h. */ |
5842f62a PA |
328 | |
329 | void | |
223ffa71 | 330 | target_terminal::init (void) |
5842f62a | 331 | { |
8b88a78e | 332 | current_top_target ()->terminal_init (); |
5842f62a | 333 | |
e671cd59 | 334 | m_terminal_state = target_terminal_state::is_ours; |
5842f62a PA |
335 | } |
336 | ||
223ffa71 | 337 | /* See target/target.h. */ |
2f99e8fc | 338 | |
d9d2d8b6 | 339 | void |
223ffa71 | 340 | target_terminal::inferior (void) |
d9d2d8b6 | 341 | { |
41fd2b0f PA |
342 | struct ui *ui = current_ui; |
343 | ||
d9d2d8b6 | 344 | /* A background resume (``run&'') should leave GDB in control of the |
3b12939d PA |
345 | terminal. */ |
346 | if (ui->prompt_state != PROMPT_BLOCKED) | |
d9d2d8b6 PA |
347 | return; |
348 | ||
215d3118 PA |
349 | /* Since we always run the inferior in the main console (unless "set |
350 | inferior-tty" is in effect), when some UI other than the main one | |
223ffa71 TT |
351 | calls target_terminal::inferior, then we leave the main UI's |
352 | terminal settings as is. */ | |
215d3118 PA |
353 | if (ui != main_ui) |
354 | return; | |
355 | ||
d9d2d8b6 PA |
356 | /* If GDB is resuming the inferior in the foreground, install |
357 | inferior's terminal modes. */ | |
e671cd59 PA |
358 | |
359 | struct inferior *inf = current_inferior (); | |
360 | ||
361 | if (inf->terminal_state != target_terminal_state::is_inferior) | |
362 | { | |
8b88a78e | 363 | current_top_target ()->terminal_inferior (); |
e671cd59 PA |
364 | inf->terminal_state = target_terminal_state::is_inferior; |
365 | } | |
366 | ||
367 | m_terminal_state = target_terminal_state::is_inferior; | |
368 | ||
369 | /* If the user hit C-c before, pretend that it was hit right | |
370 | here. */ | |
371 | if (check_quit_flag ()) | |
372 | target_pass_ctrlc (); | |
373 | } | |
374 | ||
375 | /* See target/target.h. */ | |
376 | ||
377 | void | |
378 | target_terminal::restore_inferior (void) | |
379 | { | |
380 | struct ui *ui = current_ui; | |
381 | ||
382 | /* See target_terminal::inferior(). */ | |
383 | if (ui->prompt_state != PROMPT_BLOCKED || ui != main_ui) | |
384 | return; | |
385 | ||
386 | /* Restore the terminal settings of inferiors that were in the | |
387 | foreground but are now ours_for_output due to a temporary | |
388 | target_target::ours_for_output() call. */ | |
389 | ||
390 | { | |
391 | scoped_restore_current_inferior restore_inferior; | |
e671cd59 | 392 | |
84b68c77 | 393 | for (::inferior *inf : all_inferiors ()) |
e671cd59 PA |
394 | { |
395 | if (inf->terminal_state == target_terminal_state::is_ours_for_output) | |
396 | { | |
397 | set_current_inferior (inf); | |
8b88a78e | 398 | current_top_target ()->terminal_inferior (); |
e671cd59 PA |
399 | inf->terminal_state = target_terminal_state::is_inferior; |
400 | } | |
401 | } | |
402 | } | |
403 | ||
404 | m_terminal_state = target_terminal_state::is_inferior; | |
93692b58 PA |
405 | |
406 | /* If the user hit C-c before, pretend that it was hit right | |
407 | here. */ | |
408 | if (check_quit_flag ()) | |
409 | target_pass_ctrlc (); | |
5842f62a PA |
410 | } |
411 | ||
e671cd59 PA |
412 | /* Switch terminal state to DESIRED_STATE, either is_ours, or |
413 | is_ours_for_output. */ | |
414 | ||
415 | static void | |
416 | target_terminal_is_ours_kind (target_terminal_state desired_state) | |
417 | { | |
418 | scoped_restore_current_inferior restore_inferior; | |
e671cd59 PA |
419 | |
420 | /* Must do this in two passes. First, have all inferiors save the | |
421 | current terminal settings. Then, after all inferiors have add a | |
422 | chance to safely save the terminal settings, restore GDB's | |
423 | terminal settings. */ | |
424 | ||
08036331 | 425 | for (inferior *inf : all_inferiors ()) |
e671cd59 PA |
426 | { |
427 | if (inf->terminal_state == target_terminal_state::is_inferior) | |
428 | { | |
429 | set_current_inferior (inf); | |
8b88a78e | 430 | current_top_target ()->terminal_save_inferior (); |
e671cd59 PA |
431 | } |
432 | } | |
433 | ||
08036331 | 434 | for (inferior *inf : all_inferiors ()) |
e671cd59 PA |
435 | { |
436 | /* Note we don't check is_inferior here like above because we | |
437 | need to handle 'is_ours_for_output -> is_ours' too. Careful | |
438 | to never transition from 'is_ours' to 'is_ours_for_output', | |
439 | though. */ | |
440 | if (inf->terminal_state != target_terminal_state::is_ours | |
441 | && inf->terminal_state != desired_state) | |
442 | { | |
443 | set_current_inferior (inf); | |
444 | if (desired_state == target_terminal_state::is_ours) | |
8b88a78e | 445 | current_top_target ()->terminal_ours (); |
e671cd59 | 446 | else if (desired_state == target_terminal_state::is_ours_for_output) |
8b88a78e | 447 | current_top_target ()->terminal_ours_for_output (); |
e671cd59 PA |
448 | else |
449 | gdb_assert_not_reached ("unhandled desired state"); | |
450 | inf->terminal_state = desired_state; | |
451 | } | |
452 | } | |
453 | } | |
454 | ||
223ffa71 | 455 | /* See target/target.h. */ |
5842f62a PA |
456 | |
457 | void | |
223ffa71 | 458 | target_terminal::ours () |
5842f62a | 459 | { |
41fd2b0f PA |
460 | struct ui *ui = current_ui; |
461 | ||
223ffa71 | 462 | /* See target_terminal::inferior. */ |
215d3118 PA |
463 | if (ui != main_ui) |
464 | return; | |
465 | ||
e671cd59 | 466 | if (m_terminal_state == target_terminal_state::is_ours) |
5842f62a PA |
467 | return; |
468 | ||
e671cd59 PA |
469 | target_terminal_is_ours_kind (target_terminal_state::is_ours); |
470 | m_terminal_state = target_terminal_state::is_ours; | |
5842f62a PA |
471 | } |
472 | ||
223ffa71 | 473 | /* See target/target.h. */ |
5842f62a PA |
474 | |
475 | void | |
223ffa71 | 476 | target_terminal::ours_for_output () |
5842f62a | 477 | { |
215d3118 PA |
478 | struct ui *ui = current_ui; |
479 | ||
223ffa71 | 480 | /* See target_terminal::inferior. */ |
215d3118 PA |
481 | if (ui != main_ui) |
482 | return; | |
483 | ||
e671cd59 | 484 | if (!target_terminal::is_inferior ()) |
5842f62a | 485 | return; |
e671cd59 PA |
486 | |
487 | target_terminal_is_ours_kind (target_terminal_state::is_ours_for_output); | |
488 | target_terminal::m_terminal_state = target_terminal_state::is_ours_for_output; | |
d9d2d8b6 | 489 | } |
136d6dae | 490 | |
223ffa71 TT |
491 | /* See target/target.h. */ |
492 | ||
493 | void | |
494 | target_terminal::info (const char *arg, int from_tty) | |
495 | { | |
8b88a78e | 496 | current_top_target ()->terminal_info (arg, from_tty); |
223ffa71 TT |
497 | } |
498 | ||
b0ed115f TT |
499 | /* See target.h. */ |
500 | ||
20f0d60d | 501 | bool |
b0ed115f TT |
502 | target_supports_terminal_ours (void) |
503 | { | |
20f0d60d TT |
504 | /* This can be called before there is any target, so we must check |
505 | for nullptr here. */ | |
506 | target_ops *top = current_top_target (); | |
507 | ||
508 | if (top == nullptr) | |
509 | return false; | |
510 | return top->supports_terminal_ours (); | |
b0ed115f TT |
511 | } |
512 | ||
c906108c | 513 | static void |
fba45db2 | 514 | tcomplain (void) |
c906108c | 515 | { |
8a3fe4f8 | 516 | error (_("You can't do that when your target is `%s'"), |
8b88a78e | 517 | current_top_target ()->shortname ()); |
c906108c SS |
518 | } |
519 | ||
520 | void | |
fba45db2 | 521 | noprocess (void) |
c906108c | 522 | { |
8a3fe4f8 | 523 | error (_("You can't do that without a process to debug.")); |
c906108c SS |
524 | } |
525 | ||
c906108c | 526 | static void |
0a4f40a2 | 527 | default_terminal_info (struct target_ops *self, const char *args, int from_tty) |
c906108c | 528 | { |
a3f17187 | 529 | printf_unfiltered (_("No saved terminal information.\n")); |
c906108c SS |
530 | } |
531 | ||
0ef643c8 JB |
532 | /* A default implementation for the to_get_ada_task_ptid target method. |
533 | ||
534 | This function builds the PTID by using both LWP and TID as part of | |
535 | the PTID lwp and tid elements. The pid used is the pid of the | |
536 | inferior_ptid. */ | |
537 | ||
2c0b251b | 538 | static ptid_t |
1e6b91a4 | 539 | default_get_ada_task_ptid (struct target_ops *self, long lwp, long tid) |
0ef643c8 | 540 | { |
e99b03dc | 541 | return ptid_t (inferior_ptid.pid (), lwp, tid); |
0ef643c8 JB |
542 | } |
543 | ||
32231432 | 544 | static enum exec_direction_kind |
4c612759 | 545 | default_execution_direction (struct target_ops *self) |
32231432 PA |
546 | { |
547 | if (!target_can_execute_reverse) | |
548 | return EXEC_FORWARD; | |
549 | else if (!target_can_async_p ()) | |
550 | return EXEC_FORWARD; | |
551 | else | |
552 | gdb_assert_not_reached ("\ | |
553 | to_execution_direction must be implemented for reverse async"); | |
554 | } | |
555 | ||
a1740ee1 | 556 | /* See target.h. */ |
c906108c | 557 | |
b26a4dcb | 558 | void |
a1740ee1 | 559 | target_stack::push (target_ops *t) |
c906108c | 560 | { |
a1740ee1 | 561 | /* If there's already a target at this stratum, remove it. */ |
66b4deae PA |
562 | strata stratum = t->stratum (); |
563 | ||
564 | if (m_stack[stratum] != NULL) | |
c906108c | 565 | { |
66b4deae PA |
566 | target_ops *prev = m_stack[stratum]; |
567 | m_stack[stratum] = NULL; | |
a1740ee1 | 568 | target_close (prev); |
c906108c SS |
569 | } |
570 | ||
a1740ee1 | 571 | /* Now add the new one. */ |
66b4deae | 572 | m_stack[stratum] = t; |
5d502164 | 573 | |
66b4deae PA |
574 | if (m_top < stratum) |
575 | m_top = stratum; | |
a1740ee1 PA |
576 | } |
577 | ||
578 | /* See target.h. */ | |
c906108c | 579 | |
a1740ee1 PA |
580 | void |
581 | push_target (struct target_ops *t) | |
582 | { | |
583 | g_target_stack.push (t); | |
c906108c SS |
584 | } |
585 | ||
dea57a62 TT |
586 | /* See target.h */ |
587 | ||
588 | void | |
589 | push_target (target_ops_up &&t) | |
590 | { | |
591 | g_target_stack.push (t.get ()); | |
592 | t.release (); | |
593 | } | |
594 | ||
a1740ee1 | 595 | /* See target.h. */ |
c906108c SS |
596 | |
597 | int | |
fba45db2 | 598 | unpush_target (struct target_ops *t) |
a1740ee1 PA |
599 | { |
600 | return g_target_stack.unpush (t); | |
601 | } | |
602 | ||
603 | /* See target.h. */ | |
604 | ||
605 | bool | |
606 | target_stack::unpush (target_ops *t) | |
c906108c | 607 | { |
1688cb29 TT |
608 | gdb_assert (t != NULL); |
609 | ||
66b4deae PA |
610 | strata stratum = t->stratum (); |
611 | ||
612 | if (stratum == dummy_stratum) | |
c8d104ad | 613 | internal_error (__FILE__, __LINE__, |
9b20d036 | 614 | _("Attempt to unpush the dummy target")); |
c8d104ad | 615 | |
a1740ee1 PA |
616 | /* Look for the specified target. Note that a target can only occur |
617 | once in the target stack. */ | |
c906108c | 618 | |
66b4deae | 619 | if (m_stack[stratum] != t) |
258b763a | 620 | { |
a1740ee1 PA |
621 | /* If T wasn't pushed, quit. Only open targets should be |
622 | closed. */ | |
623 | return false; | |
258b763a | 624 | } |
c906108c | 625 | |
c378eb4e | 626 | /* Unchain the target. */ |
66b4deae | 627 | m_stack[stratum] = NULL; |
a1740ee1 | 628 | |
66b4deae PA |
629 | if (m_top == stratum) |
630 | m_top = t->beneath ()->stratum (); | |
c906108c | 631 | |
305436e0 PA |
632 | /* Finally close the target. Note we do this after unchaining, so |
633 | any target method calls from within the target_close | |
634 | implementation don't end up in T anymore. */ | |
460014f5 | 635 | target_close (t); |
305436e0 | 636 | |
a1740ee1 | 637 | return true; |
c906108c SS |
638 | } |
639 | ||
915ef8b1 PA |
640 | /* Unpush TARGET and assert that it worked. */ |
641 | ||
642 | static void | |
643 | unpush_target_and_assert (struct target_ops *target) | |
644 | { | |
645 | if (!unpush_target (target)) | |
646 | { | |
647 | fprintf_unfiltered (gdb_stderr, | |
648 | "pop_all_targets couldn't find target %s\n", | |
f6ac5f3d | 649 | target->shortname ()); |
915ef8b1 PA |
650 | internal_error (__FILE__, __LINE__, |
651 | _("failed internal consistency check")); | |
652 | } | |
653 | } | |
654 | ||
aa76d38d | 655 | void |
460014f5 | 656 | pop_all_targets_above (enum strata above_stratum) |
aa76d38d | 657 | { |
66b4deae | 658 | while ((int) (current_top_target ()->stratum ()) > (int) above_stratum) |
8b88a78e | 659 | unpush_target_and_assert (current_top_target ()); |
915ef8b1 PA |
660 | } |
661 | ||
662 | /* See target.h. */ | |
663 | ||
664 | void | |
665 | pop_all_targets_at_and_above (enum strata stratum) | |
666 | { | |
66b4deae | 667 | while ((int) (current_top_target ()->stratum ()) >= (int) stratum) |
8b88a78e | 668 | unpush_target_and_assert (current_top_target ()); |
aa76d38d PA |
669 | } |
670 | ||
87ab71f0 | 671 | void |
460014f5 | 672 | pop_all_targets (void) |
87ab71f0 | 673 | { |
460014f5 | 674 | pop_all_targets_above (dummy_stratum); |
87ab71f0 PA |
675 | } |
676 | ||
c0edd9ed JK |
677 | /* Return 1 if T is now pushed in the target stack. Return 0 otherwise. */ |
678 | ||
679 | int | |
680 | target_is_pushed (struct target_ops *t) | |
681 | { | |
a1740ee1 | 682 | return g_target_stack.is_pushed (t); |
c0edd9ed JK |
683 | } |
684 | ||
f0f9ff95 TT |
685 | /* Default implementation of to_get_thread_local_address. */ |
686 | ||
687 | static void | |
688 | generic_tls_error (void) | |
689 | { | |
690 | throw_error (TLS_GENERIC_ERROR, | |
691 | _("Cannot find thread-local variables on this target")); | |
692 | } | |
693 | ||
72f5cf0e | 694 | /* Using the objfile specified in OBJFILE, find the address for the |
9e35dae4 DJ |
695 | current thread's thread-local storage with offset OFFSET. */ |
696 | CORE_ADDR | |
697 | target_translate_tls_address (struct objfile *objfile, CORE_ADDR offset) | |
698 | { | |
699 | volatile CORE_ADDR addr = 0; | |
8b88a78e | 700 | struct target_ops *target = current_top_target (); |
9e35dae4 | 701 | |
f0f9ff95 | 702 | if (gdbarch_fetch_tls_load_module_address_p (target_gdbarch ())) |
9e35dae4 DJ |
703 | { |
704 | ptid_t ptid = inferior_ptid; | |
9e35dae4 | 705 | |
492d29ea | 706 | TRY |
9e35dae4 DJ |
707 | { |
708 | CORE_ADDR lm_addr; | |
709 | ||
710 | /* Fetch the load module address for this objfile. */ | |
f5656ead | 711 | lm_addr = gdbarch_fetch_tls_load_module_address (target_gdbarch (), |
9e35dae4 | 712 | objfile); |
9e35dae4 | 713 | |
f6ac5f3d | 714 | addr = target->get_thread_local_address (ptid, lm_addr, offset); |
9e35dae4 DJ |
715 | } |
716 | /* If an error occurred, print TLS related messages here. Otherwise, | |
717 | throw the error to some higher catcher. */ | |
492d29ea | 718 | CATCH (ex, RETURN_MASK_ALL) |
9e35dae4 DJ |
719 | { |
720 | int objfile_is_library = (objfile->flags & OBJF_SHARED); | |
721 | ||
722 | switch (ex.error) | |
723 | { | |
724 | case TLS_NO_LIBRARY_SUPPORT_ERROR: | |
3e43a32a MS |
725 | error (_("Cannot find thread-local variables " |
726 | "in this thread library.")); | |
9e35dae4 DJ |
727 | break; |
728 | case TLS_LOAD_MODULE_NOT_FOUND_ERROR: | |
729 | if (objfile_is_library) | |
730 | error (_("Cannot find shared library `%s' in dynamic" | |
4262abfb | 731 | " linker's load module list"), objfile_name (objfile)); |
9e35dae4 DJ |
732 | else |
733 | error (_("Cannot find executable file `%s' in dynamic" | |
4262abfb | 734 | " linker's load module list"), objfile_name (objfile)); |
9e35dae4 DJ |
735 | break; |
736 | case TLS_NOT_ALLOCATED_YET_ERROR: | |
737 | if (objfile_is_library) | |
738 | error (_("The inferior has not yet allocated storage for" | |
739 | " thread-local variables in\n" | |
740 | "the shared library `%s'\n" | |
741 | "for %s"), | |
4262abfb | 742 | objfile_name (objfile), target_pid_to_str (ptid)); |
9e35dae4 DJ |
743 | else |
744 | error (_("The inferior has not yet allocated storage for" | |
745 | " thread-local variables in\n" | |
746 | "the executable `%s'\n" | |
747 | "for %s"), | |
4262abfb | 748 | objfile_name (objfile), target_pid_to_str (ptid)); |
9e35dae4 DJ |
749 | break; |
750 | case TLS_GENERIC_ERROR: | |
751 | if (objfile_is_library) | |
752 | error (_("Cannot find thread-local storage for %s, " | |
753 | "shared library %s:\n%s"), | |
754 | target_pid_to_str (ptid), | |
4262abfb | 755 | objfile_name (objfile), ex.message); |
9e35dae4 DJ |
756 | else |
757 | error (_("Cannot find thread-local storage for %s, " | |
758 | "executable file %s:\n%s"), | |
759 | target_pid_to_str (ptid), | |
4262abfb | 760 | objfile_name (objfile), ex.message); |
9e35dae4 DJ |
761 | break; |
762 | default: | |
763 | throw_exception (ex); | |
764 | break; | |
765 | } | |
766 | } | |
492d29ea | 767 | END_CATCH |
9e35dae4 DJ |
768 | } |
769 | /* It wouldn't be wrong here to try a gdbarch method, too; finding | |
770 | TLS is an ABI-specific thing. But we don't do that yet. */ | |
771 | else | |
772 | error (_("Cannot find thread-local variables on this target")); | |
773 | ||
774 | return addr; | |
775 | } | |
776 | ||
6be7b56e | 777 | const char * |
01cb8804 | 778 | target_xfer_status_to_string (enum target_xfer_status status) |
6be7b56e PA |
779 | { |
780 | #define CASE(X) case X: return #X | |
01cb8804 | 781 | switch (status) |
6be7b56e PA |
782 | { |
783 | CASE(TARGET_XFER_E_IO); | |
bc113b4e | 784 | CASE(TARGET_XFER_UNAVAILABLE); |
6be7b56e PA |
785 | default: |
786 | return "<unknown>"; | |
787 | } | |
788 | #undef CASE | |
789 | }; | |
790 | ||
791 | ||
c906108c SS |
792 | #undef MIN |
793 | #define MIN(A, B) (((A) <= (B)) ? (A) : (B)) | |
794 | ||
795 | /* target_read_string -- read a null terminated string, up to LEN bytes, | |
796 | from MEMADDR in target. Set *ERRNOP to the errno code, or 0 if successful. | |
797 | Set *STRING to a pointer to malloc'd memory containing the data; the caller | |
798 | is responsible for freeing it. Return the number of bytes successfully | |
799 | read. */ | |
800 | ||
801 | int | |
e83e4e24 TT |
802 | target_read_string (CORE_ADDR memaddr, gdb::unique_xmalloc_ptr<char> *string, |
803 | int len, int *errnop) | |
c906108c | 804 | { |
c2e8b827 | 805 | int tlen, offset, i; |
1b0ba102 | 806 | gdb_byte buf[4]; |
c906108c SS |
807 | int errcode = 0; |
808 | char *buffer; | |
809 | int buffer_allocated; | |
810 | char *bufptr; | |
811 | unsigned int nbytes_read = 0; | |
812 | ||
6217bf3e MS |
813 | gdb_assert (string); |
814 | ||
c906108c SS |
815 | /* Small for testing. */ |
816 | buffer_allocated = 4; | |
224c3ddb | 817 | buffer = (char *) xmalloc (buffer_allocated); |
c906108c SS |
818 | bufptr = buffer; |
819 | ||
c906108c SS |
820 | while (len > 0) |
821 | { | |
822 | tlen = MIN (len, 4 - (memaddr & 3)); | |
823 | offset = memaddr & 3; | |
824 | ||
1b0ba102 | 825 | errcode = target_read_memory (memaddr & ~3, buf, sizeof buf); |
c906108c SS |
826 | if (errcode != 0) |
827 | { | |
828 | /* The transfer request might have crossed the boundary to an | |
c378eb4e | 829 | unallocated region of memory. Retry the transfer, requesting |
c906108c SS |
830 | a single byte. */ |
831 | tlen = 1; | |
832 | offset = 0; | |
b8eb5af0 | 833 | errcode = target_read_memory (memaddr, buf, 1); |
c906108c SS |
834 | if (errcode != 0) |
835 | goto done; | |
836 | } | |
837 | ||
838 | if (bufptr - buffer + tlen > buffer_allocated) | |
839 | { | |
840 | unsigned int bytes; | |
5d502164 | 841 | |
c906108c SS |
842 | bytes = bufptr - buffer; |
843 | buffer_allocated *= 2; | |
224c3ddb | 844 | buffer = (char *) xrealloc (buffer, buffer_allocated); |
c906108c SS |
845 | bufptr = buffer + bytes; |
846 | } | |
847 | ||
848 | for (i = 0; i < tlen; i++) | |
849 | { | |
850 | *bufptr++ = buf[i + offset]; | |
851 | if (buf[i + offset] == '\000') | |
852 | { | |
853 | nbytes_read += i + 1; | |
854 | goto done; | |
855 | } | |
856 | } | |
857 | ||
858 | memaddr += tlen; | |
859 | len -= tlen; | |
860 | nbytes_read += tlen; | |
861 | } | |
c5aa993b | 862 | done: |
e83e4e24 | 863 | string->reset (buffer); |
c906108c SS |
864 | if (errnop != NULL) |
865 | *errnop = errcode; | |
c906108c SS |
866 | return nbytes_read; |
867 | } | |
868 | ||
07b82ea5 PA |
869 | struct target_section_table * |
870 | target_get_section_table (struct target_ops *target) | |
871 | { | |
f6ac5f3d | 872 | return target->get_section_table (); |
07b82ea5 PA |
873 | } |
874 | ||
8db32d44 | 875 | /* Find a section containing ADDR. */ |
07b82ea5 | 876 | |
0542c86d | 877 | struct target_section * |
8db32d44 AC |
878 | target_section_by_addr (struct target_ops *target, CORE_ADDR addr) |
879 | { | |
07b82ea5 | 880 | struct target_section_table *table = target_get_section_table (target); |
0542c86d | 881 | struct target_section *secp; |
07b82ea5 PA |
882 | |
883 | if (table == NULL) | |
884 | return NULL; | |
885 | ||
886 | for (secp = table->sections; secp < table->sections_end; secp++) | |
8db32d44 AC |
887 | { |
888 | if (addr >= secp->addr && addr < secp->endaddr) | |
889 | return secp; | |
890 | } | |
891 | return NULL; | |
892 | } | |
893 | ||
0fec99e8 PA |
894 | |
895 | /* Helper for the memory xfer routines. Checks the attributes of the | |
896 | memory region of MEMADDR against the read or write being attempted. | |
897 | If the access is permitted returns true, otherwise returns false. | |
898 | REGION_P is an optional output parameter. If not-NULL, it is | |
899 | filled with a pointer to the memory region of MEMADDR. REG_LEN | |
900 | returns LEN trimmed to the end of the region. This is how much the | |
901 | caller can continue requesting, if the access is permitted. A | |
902 | single xfer request must not straddle memory region boundaries. */ | |
903 | ||
904 | static int | |
905 | memory_xfer_check_region (gdb_byte *readbuf, const gdb_byte *writebuf, | |
906 | ULONGEST memaddr, ULONGEST len, ULONGEST *reg_len, | |
907 | struct mem_region **region_p) | |
908 | { | |
909 | struct mem_region *region; | |
910 | ||
911 | region = lookup_mem_region (memaddr); | |
912 | ||
913 | if (region_p != NULL) | |
914 | *region_p = region; | |
915 | ||
916 | switch (region->attrib.mode) | |
917 | { | |
918 | case MEM_RO: | |
919 | if (writebuf != NULL) | |
920 | return 0; | |
921 | break; | |
922 | ||
923 | case MEM_WO: | |
924 | if (readbuf != NULL) | |
925 | return 0; | |
926 | break; | |
927 | ||
928 | case MEM_FLASH: | |
929 | /* We only support writing to flash during "load" for now. */ | |
930 | if (writebuf != NULL) | |
931 | error (_("Writing to flash memory forbidden in this context")); | |
932 | break; | |
933 | ||
934 | case MEM_NONE: | |
935 | return 0; | |
936 | } | |
937 | ||
938 | /* region->hi == 0 means there's no upper bound. */ | |
939 | if (memaddr + len < region->hi || region->hi == 0) | |
940 | *reg_len = len; | |
941 | else | |
942 | *reg_len = region->hi - memaddr; | |
943 | ||
944 | return 1; | |
945 | } | |
946 | ||
9f713294 YQ |
947 | /* Read memory from more than one valid target. A core file, for |
948 | instance, could have some of memory but delegate other bits to | |
949 | the target below it. So, we must manually try all targets. */ | |
950 | ||
cc9f16aa | 951 | enum target_xfer_status |
17fde6d0 | 952 | raw_memory_xfer_partial (struct target_ops *ops, gdb_byte *readbuf, |
9b409511 YQ |
953 | const gdb_byte *writebuf, ULONGEST memaddr, LONGEST len, |
954 | ULONGEST *xfered_len) | |
9f713294 | 955 | { |
9b409511 | 956 | enum target_xfer_status res; |
9f713294 YQ |
957 | |
958 | do | |
959 | { | |
f6ac5f3d PA |
960 | res = ops->xfer_partial (TARGET_OBJECT_MEMORY, NULL, |
961 | readbuf, writebuf, memaddr, len, | |
962 | xfered_len); | |
9b409511 | 963 | if (res == TARGET_XFER_OK) |
9f713294 YQ |
964 | break; |
965 | ||
633785ff | 966 | /* Stop if the target reports that the memory is not available. */ |
bc113b4e | 967 | if (res == TARGET_XFER_UNAVAILABLE) |
633785ff MM |
968 | break; |
969 | ||
9f713294 YQ |
970 | /* We want to continue past core files to executables, but not |
971 | past a running target's memory. */ | |
f6ac5f3d | 972 | if (ops->has_all_memory ()) |
9f713294 YQ |
973 | break; |
974 | ||
b6a8c27b | 975 | ops = ops->beneath (); |
9f713294 YQ |
976 | } |
977 | while (ops != NULL); | |
978 | ||
0f26cec1 PA |
979 | /* The cache works at the raw memory level. Make sure the cache |
980 | gets updated with raw contents no matter what kind of memory | |
981 | object was originally being written. Note we do write-through | |
982 | first, so that if it fails, we don't write to the cache contents | |
983 | that never made it to the target. */ | |
984 | if (writebuf != NULL | |
d7e15655 | 985 | && inferior_ptid != null_ptid |
0f26cec1 PA |
986 | && target_dcache_init_p () |
987 | && (stack_cache_enabled_p () || code_cache_enabled_p ())) | |
988 | { | |
989 | DCACHE *dcache = target_dcache_get (); | |
990 | ||
991 | /* Note that writing to an area of memory which wasn't present | |
992 | in the cache doesn't cause it to be loaded in. */ | |
993 | dcache_update (dcache, res, memaddr, writebuf, *xfered_len); | |
994 | } | |
995 | ||
9f713294 YQ |
996 | return res; |
997 | } | |
998 | ||
7f79c47e DE |
999 | /* Perform a partial memory transfer. |
1000 | For docs see target.h, to_xfer_partial. */ | |
cf7a04e8 | 1001 | |
9b409511 | 1002 | static enum target_xfer_status |
f0ba3972 | 1003 | memory_xfer_partial_1 (struct target_ops *ops, enum target_object object, |
17fde6d0 | 1004 | gdb_byte *readbuf, const gdb_byte *writebuf, ULONGEST memaddr, |
9b409511 | 1005 | ULONGEST len, ULONGEST *xfered_len) |
0779438d | 1006 | { |
9b409511 | 1007 | enum target_xfer_status res; |
0fec99e8 | 1008 | ULONGEST reg_len; |
cf7a04e8 | 1009 | struct mem_region *region; |
4e5d721f | 1010 | struct inferior *inf; |
cf7a04e8 | 1011 | |
07b82ea5 PA |
1012 | /* For accesses to unmapped overlay sections, read directly from |
1013 | files. Must do this first, as MEMADDR may need adjustment. */ | |
1014 | if (readbuf != NULL && overlay_debugging) | |
1015 | { | |
1016 | struct obj_section *section = find_pc_overlay (memaddr); | |
5d502164 | 1017 | |
07b82ea5 PA |
1018 | if (pc_in_unmapped_range (memaddr, section)) |
1019 | { | |
1020 | struct target_section_table *table | |
1021 | = target_get_section_table (ops); | |
1022 | const char *section_name = section->the_bfd_section->name; | |
5d502164 | 1023 | |
07b82ea5 PA |
1024 | memaddr = overlay_mapped_address (memaddr, section); |
1025 | return section_table_xfer_memory_partial (readbuf, writebuf, | |
9b409511 | 1026 | memaddr, len, xfered_len, |
07b82ea5 PA |
1027 | table->sections, |
1028 | table->sections_end, | |
1029 | section_name); | |
1030 | } | |
1031 | } | |
1032 | ||
1033 | /* Try the executable files, if "trust-readonly-sections" is set. */ | |
cf7a04e8 DJ |
1034 | if (readbuf != NULL && trust_readonly) |
1035 | { | |
0542c86d | 1036 | struct target_section *secp; |
07b82ea5 | 1037 | struct target_section_table *table; |
cf7a04e8 DJ |
1038 | |
1039 | secp = target_section_by_addr (ops, memaddr); | |
1040 | if (secp != NULL | |
2b2848e2 DE |
1041 | && (bfd_get_section_flags (secp->the_bfd_section->owner, |
1042 | secp->the_bfd_section) | |
cf7a04e8 | 1043 | & SEC_READONLY)) |
07b82ea5 PA |
1044 | { |
1045 | table = target_get_section_table (ops); | |
1046 | return section_table_xfer_memory_partial (readbuf, writebuf, | |
9b409511 | 1047 | memaddr, len, xfered_len, |
07b82ea5 PA |
1048 | table->sections, |
1049 | table->sections_end, | |
1050 | NULL); | |
1051 | } | |
98646950 UW |
1052 | } |
1053 | ||
cf7a04e8 | 1054 | /* Try GDB's internal data cache. */ |
cf7a04e8 | 1055 | |
0fec99e8 PA |
1056 | if (!memory_xfer_check_region (readbuf, writebuf, memaddr, len, ®_len, |
1057 | ®ion)) | |
1058 | return TARGET_XFER_E_IO; | |
cf7a04e8 | 1059 | |
d7e15655 | 1060 | if (inferior_ptid != null_ptid) |
00431a78 | 1061 | inf = current_inferior (); |
6c95b8df PA |
1062 | else |
1063 | inf = NULL; | |
4e5d721f DE |
1064 | |
1065 | if (inf != NULL | |
0f26cec1 | 1066 | && readbuf != NULL |
2f4d8875 PA |
1067 | /* The dcache reads whole cache lines; that doesn't play well |
1068 | with reading from a trace buffer, because reading outside of | |
1069 | the collected memory range fails. */ | |
1070 | && get_traceframe_number () == -1 | |
4e5d721f | 1071 | && (region->attrib.cache |
29453a14 YQ |
1072 | || (stack_cache_enabled_p () && object == TARGET_OBJECT_STACK_MEMORY) |
1073 | || (code_cache_enabled_p () && object == TARGET_OBJECT_CODE_MEMORY))) | |
cf7a04e8 | 1074 | { |
2a2f9fe4 YQ |
1075 | DCACHE *dcache = target_dcache_get_or_init (); |
1076 | ||
0f26cec1 PA |
1077 | return dcache_read_memory_partial (ops, dcache, memaddr, readbuf, |
1078 | reg_len, xfered_len); | |
cf7a04e8 DJ |
1079 | } |
1080 | ||
1081 | /* If none of those methods found the memory we wanted, fall back | |
1082 | to a target partial transfer. Normally a single call to | |
1083 | to_xfer_partial is enough; if it doesn't recognize an object | |
1084 | it will call the to_xfer_partial of the next target down. | |
1085 | But for memory this won't do. Memory is the only target | |
9b409511 YQ |
1086 | object which can be read from more than one valid target. |
1087 | A core file, for instance, could have some of memory but | |
1088 | delegate other bits to the target below it. So, we must | |
1089 | manually try all targets. */ | |
1090 | ||
1091 | res = raw_memory_xfer_partial (ops, readbuf, writebuf, memaddr, reg_len, | |
1092 | xfered_len); | |
cf7a04e8 DJ |
1093 | |
1094 | /* If we still haven't got anything, return the last error. We | |
1095 | give up. */ | |
1096 | return res; | |
0779438d AC |
1097 | } |
1098 | ||
f0ba3972 PA |
1099 | /* Perform a partial memory transfer. For docs see target.h, |
1100 | to_xfer_partial. */ | |
1101 | ||
9b409511 | 1102 | static enum target_xfer_status |
f0ba3972 | 1103 | memory_xfer_partial (struct target_ops *ops, enum target_object object, |
9b409511 YQ |
1104 | gdb_byte *readbuf, const gdb_byte *writebuf, |
1105 | ULONGEST memaddr, ULONGEST len, ULONGEST *xfered_len) | |
f0ba3972 | 1106 | { |
9b409511 | 1107 | enum target_xfer_status res; |
f0ba3972 PA |
1108 | |
1109 | /* Zero length requests are ok and require no work. */ | |
1110 | if (len == 0) | |
9b409511 | 1111 | return TARGET_XFER_EOF; |
f0ba3972 | 1112 | |
a738ea1d YQ |
1113 | memaddr = address_significant (target_gdbarch (), memaddr); |
1114 | ||
f0ba3972 PA |
1115 | /* Fill in READBUF with breakpoint shadows, or WRITEBUF with |
1116 | breakpoint insns, thus hiding out from higher layers whether | |
1117 | there are software breakpoints inserted in the code stream. */ | |
1118 | if (readbuf != NULL) | |
1119 | { | |
9b409511 YQ |
1120 | res = memory_xfer_partial_1 (ops, object, readbuf, NULL, memaddr, len, |
1121 | xfered_len); | |
f0ba3972 | 1122 | |
9b409511 | 1123 | if (res == TARGET_XFER_OK && !show_memory_breakpoints) |
c63528fc | 1124 | breakpoint_xfer_memory (readbuf, NULL, NULL, memaddr, *xfered_len); |
f0ba3972 PA |
1125 | } |
1126 | else | |
1127 | { | |
67c059c2 AB |
1128 | /* A large write request is likely to be partially satisfied |
1129 | by memory_xfer_partial_1. We will continually malloc | |
1130 | and free a copy of the entire write request for breakpoint | |
1131 | shadow handling even though we only end up writing a small | |
09c98b44 DB |
1132 | subset of it. Cap writes to a limit specified by the target |
1133 | to mitigate this. */ | |
f6ac5f3d | 1134 | len = std::min (ops->get_memory_xfer_limit (), len); |
67c059c2 | 1135 | |
26fcd5d7 TT |
1136 | gdb::byte_vector buf (writebuf, writebuf + len); |
1137 | breakpoint_xfer_memory (NULL, buf.data (), writebuf, memaddr, len); | |
1138 | res = memory_xfer_partial_1 (ops, object, NULL, buf.data (), memaddr, len, | |
9b409511 | 1139 | xfered_len); |
f0ba3972 PA |
1140 | } |
1141 | ||
1142 | return res; | |
1143 | } | |
1144 | ||
cb85b21b TT |
1145 | scoped_restore_tmpl<int> |
1146 | make_scoped_restore_show_memory_breakpoints (int show) | |
8defab1a | 1147 | { |
cb85b21b | 1148 | return make_scoped_restore (&show_memory_breakpoints, show); |
8defab1a DJ |
1149 | } |
1150 | ||
7f79c47e DE |
1151 | /* For docs see target.h, to_xfer_partial. */ |
1152 | ||
9b409511 | 1153 | enum target_xfer_status |
27394598 AC |
1154 | target_xfer_partial (struct target_ops *ops, |
1155 | enum target_object object, const char *annex, | |
4ac248ca | 1156 | gdb_byte *readbuf, const gdb_byte *writebuf, |
9b409511 YQ |
1157 | ULONGEST offset, ULONGEST len, |
1158 | ULONGEST *xfered_len) | |
27394598 | 1159 | { |
9b409511 | 1160 | enum target_xfer_status retval; |
27394598 | 1161 | |
ce6d0892 YQ |
1162 | /* Transfer is done when LEN is zero. */ |
1163 | if (len == 0) | |
9b409511 | 1164 | return TARGET_XFER_EOF; |
ce6d0892 | 1165 | |
d914c394 SS |
1166 | if (writebuf && !may_write_memory) |
1167 | error (_("Writing to memory is not allowed (addr %s, len %s)"), | |
1168 | core_addr_to_string_nz (offset), plongest (len)); | |
1169 | ||
9b409511 YQ |
1170 | *xfered_len = 0; |
1171 | ||
cf7a04e8 DJ |
1172 | /* If this is a memory transfer, let the memory-specific code |
1173 | have a look at it instead. Memory transfers are more | |
1174 | complicated. */ | |
29453a14 YQ |
1175 | if (object == TARGET_OBJECT_MEMORY || object == TARGET_OBJECT_STACK_MEMORY |
1176 | || object == TARGET_OBJECT_CODE_MEMORY) | |
4e5d721f | 1177 | retval = memory_xfer_partial (ops, object, readbuf, |
9b409511 | 1178 | writebuf, offset, len, xfered_len); |
9f713294 | 1179 | else if (object == TARGET_OBJECT_RAW_MEMORY) |
cf7a04e8 | 1180 | { |
0fec99e8 PA |
1181 | /* Skip/avoid accessing the target if the memory region |
1182 | attributes block the access. Check this here instead of in | |
1183 | raw_memory_xfer_partial as otherwise we'd end up checking | |
1184 | this twice in the case of the memory_xfer_partial path is | |
1185 | taken; once before checking the dcache, and another in the | |
1186 | tail call to raw_memory_xfer_partial. */ | |
1187 | if (!memory_xfer_check_region (readbuf, writebuf, offset, len, &len, | |
1188 | NULL)) | |
1189 | return TARGET_XFER_E_IO; | |
1190 | ||
9f713294 | 1191 | /* Request the normal memory object from other layers. */ |
9b409511 YQ |
1192 | retval = raw_memory_xfer_partial (ops, readbuf, writebuf, offset, len, |
1193 | xfered_len); | |
cf7a04e8 | 1194 | } |
9f713294 | 1195 | else |
f6ac5f3d PA |
1196 | retval = ops->xfer_partial (object, annex, readbuf, |
1197 | writebuf, offset, len, xfered_len); | |
cf7a04e8 | 1198 | |
27394598 AC |
1199 | if (targetdebug) |
1200 | { | |
1201 | const unsigned char *myaddr = NULL; | |
1202 | ||
1203 | fprintf_unfiltered (gdb_stdlog, | |
3e43a32a | 1204 | "%s:target_xfer_partial " |
9b409511 | 1205 | "(%d, %s, %s, %s, %s, %s) = %d, %s", |
f6ac5f3d | 1206 | ops->shortname (), |
27394598 AC |
1207 | (int) object, |
1208 | (annex ? annex : "(null)"), | |
53b71562 JB |
1209 | host_address_to_string (readbuf), |
1210 | host_address_to_string (writebuf), | |
0b1553bc | 1211 | core_addr_to_string_nz (offset), |
9b409511 YQ |
1212 | pulongest (len), retval, |
1213 | pulongest (*xfered_len)); | |
27394598 AC |
1214 | |
1215 | if (readbuf) | |
1216 | myaddr = readbuf; | |
1217 | if (writebuf) | |
1218 | myaddr = writebuf; | |
9b409511 | 1219 | if (retval == TARGET_XFER_OK && myaddr != NULL) |
27394598 AC |
1220 | { |
1221 | int i; | |
2bc416ba | 1222 | |
27394598 | 1223 | fputs_unfiltered (", bytes =", gdb_stdlog); |
9b409511 | 1224 | for (i = 0; i < *xfered_len; i++) |
27394598 | 1225 | { |
53b71562 | 1226 | if ((((intptr_t) &(myaddr[i])) & 0xf) == 0) |
27394598 AC |
1227 | { |
1228 | if (targetdebug < 2 && i > 0) | |
1229 | { | |
1230 | fprintf_unfiltered (gdb_stdlog, " ..."); | |
1231 | break; | |
1232 | } | |
1233 | fprintf_unfiltered (gdb_stdlog, "\n"); | |
1234 | } | |
2bc416ba | 1235 | |
27394598 AC |
1236 | fprintf_unfiltered (gdb_stdlog, " %02x", myaddr[i] & 0xff); |
1237 | } | |
1238 | } | |
2bc416ba | 1239 | |
27394598 AC |
1240 | fputc_unfiltered ('\n', gdb_stdlog); |
1241 | } | |
9b409511 YQ |
1242 | |
1243 | /* Check implementations of to_xfer_partial update *XFERED_LEN | |
1244 | properly. Do assertion after printing debug messages, so that we | |
1245 | can find more clues on assertion failure from debugging messages. */ | |
bc113b4e | 1246 | if (retval == TARGET_XFER_OK || retval == TARGET_XFER_UNAVAILABLE) |
9b409511 YQ |
1247 | gdb_assert (*xfered_len > 0); |
1248 | ||
27394598 AC |
1249 | return retval; |
1250 | } | |
1251 | ||
578d3588 PA |
1252 | /* Read LEN bytes of target memory at address MEMADDR, placing the |
1253 | results in GDB's memory at MYADDR. Returns either 0 for success or | |
d09f2c3f | 1254 | -1 if any error occurs. |
c906108c SS |
1255 | |
1256 | If an error occurs, no guarantee is made about the contents of the data at | |
1257 | MYADDR. In particular, the caller should not depend upon partial reads | |
1258 | filling the buffer with good data. There is no way for the caller to know | |
1259 | how much good data might have been transfered anyway. Callers that can | |
cf7a04e8 | 1260 | deal with partial reads should call target_read (which will retry until |
c378eb4e | 1261 | it makes no progress, and then return how much was transferred). */ |
c906108c SS |
1262 | |
1263 | int | |
1b162304 | 1264 | target_read_memory (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len) |
c906108c | 1265 | { |
8b88a78e | 1266 | if (target_read (current_top_target (), TARGET_OBJECT_MEMORY, NULL, |
cf7a04e8 DJ |
1267 | myaddr, memaddr, len) == len) |
1268 | return 0; | |
0779438d | 1269 | else |
d09f2c3f | 1270 | return -1; |
c906108c SS |
1271 | } |
1272 | ||
721ec300 GB |
1273 | /* See target/target.h. */ |
1274 | ||
1275 | int | |
1276 | target_read_uint32 (CORE_ADDR memaddr, uint32_t *result) | |
1277 | { | |
1278 | gdb_byte buf[4]; | |
1279 | int r; | |
1280 | ||
1281 | r = target_read_memory (memaddr, buf, sizeof buf); | |
1282 | if (r != 0) | |
1283 | return r; | |
1284 | *result = extract_unsigned_integer (buf, sizeof buf, | |
1285 | gdbarch_byte_order (target_gdbarch ())); | |
1286 | return 0; | |
1287 | } | |
1288 | ||
aee4bf85 PA |
1289 | /* Like target_read_memory, but specify explicitly that this is a read |
1290 | from the target's raw memory. That is, this read bypasses the | |
1291 | dcache, breakpoint shadowing, etc. */ | |
1292 | ||
1293 | int | |
1294 | target_read_raw_memory (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len) | |
1295 | { | |
8b88a78e | 1296 | if (target_read (current_top_target (), TARGET_OBJECT_RAW_MEMORY, NULL, |
aee4bf85 PA |
1297 | myaddr, memaddr, len) == len) |
1298 | return 0; | |
1299 | else | |
d09f2c3f | 1300 | return -1; |
aee4bf85 PA |
1301 | } |
1302 | ||
4e5d721f DE |
1303 | /* Like target_read_memory, but specify explicitly that this is a read from |
1304 | the target's stack. This may trigger different cache behavior. */ | |
1305 | ||
1306 | int | |
45aa4659 | 1307 | target_read_stack (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len) |
4e5d721f | 1308 | { |
8b88a78e | 1309 | if (target_read (current_top_target (), TARGET_OBJECT_STACK_MEMORY, NULL, |
4e5d721f DE |
1310 | myaddr, memaddr, len) == len) |
1311 | return 0; | |
1312 | else | |
d09f2c3f | 1313 | return -1; |
4e5d721f DE |
1314 | } |
1315 | ||
29453a14 YQ |
1316 | /* Like target_read_memory, but specify explicitly that this is a read from |
1317 | the target's code. This may trigger different cache behavior. */ | |
1318 | ||
1319 | int | |
1320 | target_read_code (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len) | |
1321 | { | |
8b88a78e | 1322 | if (target_read (current_top_target (), TARGET_OBJECT_CODE_MEMORY, NULL, |
29453a14 YQ |
1323 | myaddr, memaddr, len) == len) |
1324 | return 0; | |
1325 | else | |
d09f2c3f | 1326 | return -1; |
29453a14 YQ |
1327 | } |
1328 | ||
7f79c47e | 1329 | /* Write LEN bytes from MYADDR to target memory at address MEMADDR. |
d09f2c3f PA |
1330 | Returns either 0 for success or -1 if any error occurs. If an |
1331 | error occurs, no guarantee is made about how much data got written. | |
1332 | Callers that can deal with partial writes should call | |
1333 | target_write. */ | |
7f79c47e | 1334 | |
c906108c | 1335 | int |
45aa4659 | 1336 | target_write_memory (CORE_ADDR memaddr, const gdb_byte *myaddr, ssize_t len) |
c906108c | 1337 | { |
8b88a78e | 1338 | if (target_write (current_top_target (), TARGET_OBJECT_MEMORY, NULL, |
cf7a04e8 DJ |
1339 | myaddr, memaddr, len) == len) |
1340 | return 0; | |
0779438d | 1341 | else |
d09f2c3f | 1342 | return -1; |
c906108c | 1343 | } |
c5aa993b | 1344 | |
f0ba3972 | 1345 | /* Write LEN bytes from MYADDR to target raw memory at address |
d09f2c3f PA |
1346 | MEMADDR. Returns either 0 for success or -1 if any error occurs. |
1347 | If an error occurs, no guarantee is made about how much data got | |
1348 | written. Callers that can deal with partial writes should call | |
1349 | target_write. */ | |
f0ba3972 PA |
1350 | |
1351 | int | |
45aa4659 | 1352 | target_write_raw_memory (CORE_ADDR memaddr, const gdb_byte *myaddr, ssize_t len) |
f0ba3972 | 1353 | { |
8b88a78e | 1354 | if (target_write (current_top_target (), TARGET_OBJECT_RAW_MEMORY, NULL, |
f0ba3972 PA |
1355 | myaddr, memaddr, len) == len) |
1356 | return 0; | |
1357 | else | |
d09f2c3f | 1358 | return -1; |
f0ba3972 PA |
1359 | } |
1360 | ||
fd79ecee DJ |
1361 | /* Fetch the target's memory map. */ |
1362 | ||
a664f67e | 1363 | std::vector<mem_region> |
fd79ecee DJ |
1364 | target_memory_map (void) |
1365 | { | |
8b88a78e | 1366 | std::vector<mem_region> result = current_top_target ()->memory_map (); |
a664f67e SM |
1367 | if (result.empty ()) |
1368 | return result; | |
fd79ecee | 1369 | |
a664f67e | 1370 | std::sort (result.begin (), result.end ()); |
fd79ecee DJ |
1371 | |
1372 | /* Check that regions do not overlap. Simultaneously assign | |
1373 | a numbering for the "mem" commands to use to refer to | |
1374 | each region. */ | |
a664f67e SM |
1375 | mem_region *last_one = NULL; |
1376 | for (size_t ix = 0; ix < result.size (); ix++) | |
fd79ecee | 1377 | { |
a664f67e | 1378 | mem_region *this_one = &result[ix]; |
fd79ecee DJ |
1379 | this_one->number = ix; |
1380 | ||
a664f67e | 1381 | if (last_one != NULL && last_one->hi > this_one->lo) |
fd79ecee DJ |
1382 | { |
1383 | warning (_("Overlapping regions in memory map: ignoring")); | |
a664f67e | 1384 | return std::vector<mem_region> (); |
fd79ecee | 1385 | } |
a664f67e | 1386 | |
fd79ecee DJ |
1387 | last_one = this_one; |
1388 | } | |
1389 | ||
1390 | return result; | |
1391 | } | |
1392 | ||
a76d924d DJ |
1393 | void |
1394 | target_flash_erase (ULONGEST address, LONGEST length) | |
1395 | { | |
8b88a78e | 1396 | current_top_target ()->flash_erase (address, length); |
a76d924d DJ |
1397 | } |
1398 | ||
1399 | void | |
1400 | target_flash_done (void) | |
1401 | { | |
8b88a78e | 1402 | current_top_target ()->flash_done (); |
a76d924d DJ |
1403 | } |
1404 | ||
920d2a44 AC |
1405 | static void |
1406 | show_trust_readonly (struct ui_file *file, int from_tty, | |
1407 | struct cmd_list_element *c, const char *value) | |
1408 | { | |
3e43a32a MS |
1409 | fprintf_filtered (file, |
1410 | _("Mode for reading from readonly sections is %s.\n"), | |
920d2a44 AC |
1411 | value); |
1412 | } | |
3a11626d | 1413 | |
7f79c47e | 1414 | /* Target vector read/write partial wrapper functions. */ |
0088c768 | 1415 | |
9b409511 | 1416 | static enum target_xfer_status |
1e3ff5ad AC |
1417 | target_read_partial (struct target_ops *ops, |
1418 | enum target_object object, | |
1b0ba102 | 1419 | const char *annex, gdb_byte *buf, |
9b409511 YQ |
1420 | ULONGEST offset, ULONGEST len, |
1421 | ULONGEST *xfered_len) | |
1e3ff5ad | 1422 | { |
9b409511 YQ |
1423 | return target_xfer_partial (ops, object, annex, buf, NULL, offset, len, |
1424 | xfered_len); | |
1e3ff5ad AC |
1425 | } |
1426 | ||
8a55ffb0 | 1427 | static enum target_xfer_status |
1e3ff5ad AC |
1428 | target_write_partial (struct target_ops *ops, |
1429 | enum target_object object, | |
1b0ba102 | 1430 | const char *annex, const gdb_byte *buf, |
9b409511 | 1431 | ULONGEST offset, LONGEST len, ULONGEST *xfered_len) |
1e3ff5ad | 1432 | { |
9b409511 YQ |
1433 | return target_xfer_partial (ops, object, annex, NULL, buf, offset, len, |
1434 | xfered_len); | |
1e3ff5ad AC |
1435 | } |
1436 | ||
1437 | /* Wrappers to perform the full transfer. */ | |
7f79c47e DE |
1438 | |
1439 | /* For docs on target_read see target.h. */ | |
1440 | ||
1e3ff5ad AC |
1441 | LONGEST |
1442 | target_read (struct target_ops *ops, | |
1443 | enum target_object object, | |
1b0ba102 | 1444 | const char *annex, gdb_byte *buf, |
1e3ff5ad AC |
1445 | ULONGEST offset, LONGEST len) |
1446 | { | |
279a6fed | 1447 | LONGEST xfered_total = 0; |
d309493c SM |
1448 | int unit_size = 1; |
1449 | ||
1450 | /* If we are reading from a memory object, find the length of an addressable | |
1451 | unit for that architecture. */ | |
1452 | if (object == TARGET_OBJECT_MEMORY | |
1453 | || object == TARGET_OBJECT_STACK_MEMORY | |
1454 | || object == TARGET_OBJECT_CODE_MEMORY | |
1455 | || object == TARGET_OBJECT_RAW_MEMORY) | |
1456 | unit_size = gdbarch_addressable_memory_unit_size (target_gdbarch ()); | |
5d502164 | 1457 | |
279a6fed | 1458 | while (xfered_total < len) |
1e3ff5ad | 1459 | { |
279a6fed | 1460 | ULONGEST xfered_partial; |
9b409511 YQ |
1461 | enum target_xfer_status status; |
1462 | ||
1463 | status = target_read_partial (ops, object, annex, | |
d309493c | 1464 | buf + xfered_total * unit_size, |
279a6fed SM |
1465 | offset + xfered_total, len - xfered_total, |
1466 | &xfered_partial); | |
5d502164 | 1467 | |
1e3ff5ad | 1468 | /* Call an observer, notifying them of the xfer progress? */ |
9b409511 | 1469 | if (status == TARGET_XFER_EOF) |
279a6fed | 1470 | return xfered_total; |
9b409511 YQ |
1471 | else if (status == TARGET_XFER_OK) |
1472 | { | |
279a6fed | 1473 | xfered_total += xfered_partial; |
9b409511 YQ |
1474 | QUIT; |
1475 | } | |
1476 | else | |
279a6fed | 1477 | return TARGET_XFER_E_IO; |
9b409511 | 1478 | |
1e3ff5ad AC |
1479 | } |
1480 | return len; | |
1481 | } | |
1482 | ||
f1a507a1 JB |
1483 | /* Assuming that the entire [begin, end) range of memory cannot be |
1484 | read, try to read whatever subrange is possible to read. | |
1485 | ||
1486 | The function returns, in RESULT, either zero or one memory block. | |
1487 | If there's a readable subrange at the beginning, it is completely | |
1488 | read and returned. Any further readable subrange will not be read. | |
1489 | Otherwise, if there's a readable subrange at the end, it will be | |
1490 | completely read and returned. Any readable subranges before it | |
1491 | (obviously, not starting at the beginning), will be ignored. In | |
1492 | other cases -- either no readable subrange, or readable subrange(s) | |
1493 | that is neither at the beginning, or end, nothing is returned. | |
1494 | ||
1495 | The purpose of this function is to handle a read across a boundary | |
1496 | of accessible memory in a case when memory map is not available. | |
1497 | The above restrictions are fine for this case, but will give | |
1498 | incorrect results if the memory is 'patchy'. However, supporting | |
1499 | 'patchy' memory would require trying to read every single byte, | |
1500 | and it seems unacceptable solution. Explicit memory map is | |
1501 | recommended for this case -- and target_read_memory_robust will | |
1502 | take care of reading multiple ranges then. */ | |
8dedea02 VP |
1503 | |
1504 | static void | |
3e43a32a | 1505 | read_whatever_is_readable (struct target_ops *ops, |
279a6fed | 1506 | const ULONGEST begin, const ULONGEST end, |
d309493c | 1507 | int unit_size, |
386c8614 | 1508 | std::vector<memory_read_result> *result) |
d5086790 | 1509 | { |
8dedea02 VP |
1510 | ULONGEST current_begin = begin; |
1511 | ULONGEST current_end = end; | |
1512 | int forward; | |
9b409511 | 1513 | ULONGEST xfered_len; |
8dedea02 VP |
1514 | |
1515 | /* If we previously failed to read 1 byte, nothing can be done here. */ | |
1516 | if (end - begin <= 1) | |
386c8614 TT |
1517 | return; |
1518 | ||
1519 | gdb::unique_xmalloc_ptr<gdb_byte> buf ((gdb_byte *) xmalloc (end - begin)); | |
8dedea02 VP |
1520 | |
1521 | /* Check that either first or the last byte is readable, and give up | |
c378eb4e | 1522 | if not. This heuristic is meant to permit reading accessible memory |
8dedea02 VP |
1523 | at the boundary of accessible region. */ |
1524 | if (target_read_partial (ops, TARGET_OBJECT_MEMORY, NULL, | |
386c8614 | 1525 | buf.get (), begin, 1, &xfered_len) == TARGET_XFER_OK) |
8dedea02 VP |
1526 | { |
1527 | forward = 1; | |
1528 | ++current_begin; | |
1529 | } | |
1530 | else if (target_read_partial (ops, TARGET_OBJECT_MEMORY, NULL, | |
386c8614 | 1531 | buf.get () + (end - begin) - 1, end - 1, 1, |
9b409511 | 1532 | &xfered_len) == TARGET_XFER_OK) |
8dedea02 VP |
1533 | { |
1534 | forward = 0; | |
1535 | --current_end; | |
1536 | } | |
1537 | else | |
386c8614 | 1538 | return; |
8dedea02 VP |
1539 | |
1540 | /* Loop invariant is that the [current_begin, current_end) was previously | |
1541 | found to be not readable as a whole. | |
1542 | ||
1543 | Note loop condition -- if the range has 1 byte, we can't divide the range | |
1544 | so there's no point trying further. */ | |
1545 | while (current_end - current_begin > 1) | |
1546 | { | |
1547 | ULONGEST first_half_begin, first_half_end; | |
1548 | ULONGEST second_half_begin, second_half_end; | |
1549 | LONGEST xfer; | |
279a6fed | 1550 | ULONGEST middle = current_begin + (current_end - current_begin) / 2; |
f1a507a1 | 1551 | |
8dedea02 VP |
1552 | if (forward) |
1553 | { | |
1554 | first_half_begin = current_begin; | |
1555 | first_half_end = middle; | |
1556 | second_half_begin = middle; | |
1557 | second_half_end = current_end; | |
1558 | } | |
1559 | else | |
1560 | { | |
1561 | first_half_begin = middle; | |
1562 | first_half_end = current_end; | |
1563 | second_half_begin = current_begin; | |
1564 | second_half_end = middle; | |
1565 | } | |
1566 | ||
1567 | xfer = target_read (ops, TARGET_OBJECT_MEMORY, NULL, | |
386c8614 | 1568 | buf.get () + (first_half_begin - begin) * unit_size, |
8dedea02 VP |
1569 | first_half_begin, |
1570 | first_half_end - first_half_begin); | |
1571 | ||
1572 | if (xfer == first_half_end - first_half_begin) | |
1573 | { | |
c378eb4e | 1574 | /* This half reads up fine. So, the error must be in the |
3e43a32a | 1575 | other half. */ |
8dedea02 VP |
1576 | current_begin = second_half_begin; |
1577 | current_end = second_half_end; | |
1578 | } | |
1579 | else | |
1580 | { | |
c378eb4e | 1581 | /* This half is not readable. Because we've tried one byte, we |
279a6fed | 1582 | know some part of this half if actually readable. Go to the next |
8dedea02 VP |
1583 | iteration to divide again and try to read. |
1584 | ||
1585 | We don't handle the other half, because this function only tries | |
1586 | to read a single readable subrange. */ | |
1587 | current_begin = first_half_begin; | |
1588 | current_end = first_half_end; | |
1589 | } | |
1590 | } | |
1591 | ||
1592 | if (forward) | |
1593 | { | |
1594 | /* The [begin, current_begin) range has been read. */ | |
386c8614 | 1595 | result->emplace_back (begin, current_end, std::move (buf)); |
8dedea02 VP |
1596 | } |
1597 | else | |
1598 | { | |
1599 | /* The [current_end, end) range has been read. */ | |
279a6fed | 1600 | LONGEST region_len = end - current_end; |
f1a507a1 | 1601 | |
386c8614 TT |
1602 | gdb::unique_xmalloc_ptr<gdb_byte> data |
1603 | ((gdb_byte *) xmalloc (region_len * unit_size)); | |
1604 | memcpy (data.get (), buf.get () + (current_end - begin) * unit_size, | |
d309493c | 1605 | region_len * unit_size); |
386c8614 | 1606 | result->emplace_back (current_end, end, std::move (data)); |
8dedea02 | 1607 | } |
8dedea02 VP |
1608 | } |
1609 | ||
386c8614 | 1610 | std::vector<memory_read_result> |
279a6fed SM |
1611 | read_memory_robust (struct target_ops *ops, |
1612 | const ULONGEST offset, const LONGEST len) | |
8dedea02 | 1613 | { |
386c8614 | 1614 | std::vector<memory_read_result> result; |
d309493c | 1615 | int unit_size = gdbarch_addressable_memory_unit_size (target_gdbarch ()); |
8dedea02 | 1616 | |
279a6fed SM |
1617 | LONGEST xfered_total = 0; |
1618 | while (xfered_total < len) | |
d5086790 | 1619 | { |
279a6fed SM |
1620 | struct mem_region *region = lookup_mem_region (offset + xfered_total); |
1621 | LONGEST region_len; | |
5d502164 | 1622 | |
8dedea02 VP |
1623 | /* If there is no explicit region, a fake one should be created. */ |
1624 | gdb_assert (region); | |
1625 | ||
1626 | if (region->hi == 0) | |
279a6fed | 1627 | region_len = len - xfered_total; |
8dedea02 | 1628 | else |
279a6fed | 1629 | region_len = region->hi - offset; |
8dedea02 VP |
1630 | |
1631 | if (region->attrib.mode == MEM_NONE || region->attrib.mode == MEM_WO) | |
d5086790 | 1632 | { |
c378eb4e | 1633 | /* Cannot read this region. Note that we can end up here only |
8dedea02 VP |
1634 | if the region is explicitly marked inaccessible, or |
1635 | 'inaccessible-by-default' is in effect. */ | |
279a6fed | 1636 | xfered_total += region_len; |
8dedea02 VP |
1637 | } |
1638 | else | |
1639 | { | |
325fac50 | 1640 | LONGEST to_read = std::min (len - xfered_total, region_len); |
386c8614 TT |
1641 | gdb::unique_xmalloc_ptr<gdb_byte> buffer |
1642 | ((gdb_byte *) xmalloc (to_read * unit_size)); | |
8dedea02 | 1643 | |
279a6fed | 1644 | LONGEST xfered_partial = |
386c8614 | 1645 | target_read (ops, TARGET_OBJECT_MEMORY, NULL, buffer.get (), |
279a6fed | 1646 | offset + xfered_total, to_read); |
8dedea02 | 1647 | /* Call an observer, notifying them of the xfer progress? */ |
279a6fed | 1648 | if (xfered_partial <= 0) |
d5086790 | 1649 | { |
c378eb4e | 1650 | /* Got an error reading full chunk. See if maybe we can read |
8dedea02 | 1651 | some subrange. */ |
e084c964 DB |
1652 | read_whatever_is_readable (ops, offset + xfered_total, |
1653 | offset + xfered_total + to_read, | |
1654 | unit_size, &result); | |
279a6fed | 1655 | xfered_total += to_read; |
d5086790 | 1656 | } |
8dedea02 VP |
1657 | else |
1658 | { | |
386c8614 TT |
1659 | result.emplace_back (offset + xfered_total, |
1660 | offset + xfered_total + xfered_partial, | |
1661 | std::move (buffer)); | |
279a6fed | 1662 | xfered_total += xfered_partial; |
8dedea02 VP |
1663 | } |
1664 | QUIT; | |
d5086790 | 1665 | } |
d5086790 | 1666 | } |
9d78f827 | 1667 | |
8dedea02 | 1668 | return result; |
d5086790 VP |
1669 | } |
1670 | ||
8dedea02 | 1671 | |
cf7a04e8 DJ |
1672 | /* An alternative to target_write with progress callbacks. */ |
1673 | ||
1e3ff5ad | 1674 | LONGEST |
cf7a04e8 DJ |
1675 | target_write_with_progress (struct target_ops *ops, |
1676 | enum target_object object, | |
1677 | const char *annex, const gdb_byte *buf, | |
1678 | ULONGEST offset, LONGEST len, | |
1679 | void (*progress) (ULONGEST, void *), void *baton) | |
1e3ff5ad | 1680 | { |
279a6fed | 1681 | LONGEST xfered_total = 0; |
d309493c SM |
1682 | int unit_size = 1; |
1683 | ||
1684 | /* If we are writing to a memory object, find the length of an addressable | |
1685 | unit for that architecture. */ | |
1686 | if (object == TARGET_OBJECT_MEMORY | |
1687 | || object == TARGET_OBJECT_STACK_MEMORY | |
1688 | || object == TARGET_OBJECT_CODE_MEMORY | |
1689 | || object == TARGET_OBJECT_RAW_MEMORY) | |
1690 | unit_size = gdbarch_addressable_memory_unit_size (target_gdbarch ()); | |
a76d924d DJ |
1691 | |
1692 | /* Give the progress callback a chance to set up. */ | |
1693 | if (progress) | |
1694 | (*progress) (0, baton); | |
1695 | ||
279a6fed | 1696 | while (xfered_total < len) |
1e3ff5ad | 1697 | { |
279a6fed | 1698 | ULONGEST xfered_partial; |
9b409511 YQ |
1699 | enum target_xfer_status status; |
1700 | ||
1701 | status = target_write_partial (ops, object, annex, | |
d309493c | 1702 | buf + xfered_total * unit_size, |
279a6fed SM |
1703 | offset + xfered_total, len - xfered_total, |
1704 | &xfered_partial); | |
cf7a04e8 | 1705 | |
5c328c05 | 1706 | if (status != TARGET_XFER_OK) |
279a6fed | 1707 | return status == TARGET_XFER_EOF ? xfered_total : TARGET_XFER_E_IO; |
cf7a04e8 DJ |
1708 | |
1709 | if (progress) | |
279a6fed | 1710 | (*progress) (xfered_partial, baton); |
cf7a04e8 | 1711 | |
279a6fed | 1712 | xfered_total += xfered_partial; |
1e3ff5ad AC |
1713 | QUIT; |
1714 | } | |
1715 | return len; | |
1716 | } | |
1717 | ||
7f79c47e DE |
1718 | /* For docs on target_write see target.h. */ |
1719 | ||
cf7a04e8 DJ |
1720 | LONGEST |
1721 | target_write (struct target_ops *ops, | |
1722 | enum target_object object, | |
1723 | const char *annex, const gdb_byte *buf, | |
1724 | ULONGEST offset, LONGEST len) | |
1725 | { | |
1726 | return target_write_with_progress (ops, object, annex, buf, offset, len, | |
1727 | NULL, NULL); | |
1728 | } | |
1729 | ||
9018be22 SM |
1730 | /* Help for target_read_alloc and target_read_stralloc. See their comments |
1731 | for details. */ | |
13547ab6 | 1732 | |
9018be22 SM |
1733 | template <typename T> |
1734 | gdb::optional<gdb::def_vector<T>> | |
159f81f3 | 1735 | target_read_alloc_1 (struct target_ops *ops, enum target_object object, |
9018be22 | 1736 | const char *annex) |
13547ab6 | 1737 | { |
9018be22 SM |
1738 | gdb::def_vector<T> buf; |
1739 | size_t buf_pos = 0; | |
1740 | const int chunk = 4096; | |
13547ab6 DJ |
1741 | |
1742 | /* This function does not have a length parameter; it reads the | |
1743 | entire OBJECT). Also, it doesn't support objects fetched partly | |
1744 | from one target and partly from another (in a different stratum, | |
1745 | e.g. a core file and an executable). Both reasons make it | |
1746 | unsuitable for reading memory. */ | |
1747 | gdb_assert (object != TARGET_OBJECT_MEMORY); | |
1748 | ||
1749 | /* Start by reading up to 4K at a time. The target will throttle | |
1750 | this number down if necessary. */ | |
13547ab6 DJ |
1751 | while (1) |
1752 | { | |
9b409511 YQ |
1753 | ULONGEST xfered_len; |
1754 | enum target_xfer_status status; | |
1755 | ||
9018be22 SM |
1756 | buf.resize (buf_pos + chunk); |
1757 | ||
1758 | status = target_read_partial (ops, object, annex, | |
1759 | (gdb_byte *) &buf[buf_pos], | |
1760 | buf_pos, chunk, | |
9b409511 YQ |
1761 | &xfered_len); |
1762 | ||
1763 | if (status == TARGET_XFER_EOF) | |
13547ab6 DJ |
1764 | { |
1765 | /* Read all there was. */ | |
9018be22 SM |
1766 | buf.resize (buf_pos); |
1767 | return buf; | |
13547ab6 | 1768 | } |
9b409511 YQ |
1769 | else if (status != TARGET_XFER_OK) |
1770 | { | |
1771 | /* An error occurred. */ | |
9018be22 | 1772 | return {}; |
9b409511 | 1773 | } |
13547ab6 | 1774 | |
9b409511 | 1775 | buf_pos += xfered_len; |
13547ab6 | 1776 | |
13547ab6 DJ |
1777 | QUIT; |
1778 | } | |
1779 | } | |
1780 | ||
9018be22 | 1781 | /* See target.h */ |
159f81f3 | 1782 | |
9018be22 | 1783 | gdb::optional<gdb::byte_vector> |
159f81f3 | 1784 | target_read_alloc (struct target_ops *ops, enum target_object object, |
9018be22 | 1785 | const char *annex) |
159f81f3 | 1786 | { |
9018be22 | 1787 | return target_read_alloc_1<gdb_byte> (ops, object, annex); |
159f81f3 DJ |
1788 | } |
1789 | ||
b7b030ad | 1790 | /* See target.h. */ |
159f81f3 | 1791 | |
9018be22 | 1792 | gdb::optional<gdb::char_vector> |
159f81f3 DJ |
1793 | target_read_stralloc (struct target_ops *ops, enum target_object object, |
1794 | const char *annex) | |
1795 | { | |
9018be22 SM |
1796 | gdb::optional<gdb::char_vector> buf |
1797 | = target_read_alloc_1<char> (ops, object, annex); | |
159f81f3 | 1798 | |
9018be22 SM |
1799 | if (!buf) |
1800 | return {}; | |
159f81f3 | 1801 | |
d00a27c5 | 1802 | if (buf->empty () || buf->back () != '\0') |
9018be22 | 1803 | buf->push_back ('\0'); |
7313baad UW |
1804 | |
1805 | /* Check for embedded NUL bytes; but allow trailing NULs. */ | |
9018be22 SM |
1806 | for (auto it = std::find (buf->begin (), buf->end (), '\0'); |
1807 | it != buf->end (); it++) | |
1808 | if (*it != '\0') | |
7313baad UW |
1809 | { |
1810 | warning (_("target object %d, annex %s, " | |
1811 | "contained unexpected null characters"), | |
1812 | (int) object, annex ? annex : "(none)"); | |
1813 | break; | |
1814 | } | |
159f81f3 | 1815 | |
9018be22 | 1816 | return buf; |
159f81f3 DJ |
1817 | } |
1818 | ||
b6591e8b AC |
1819 | /* Memory transfer methods. */ |
1820 | ||
1821 | void | |
1b0ba102 | 1822 | get_target_memory (struct target_ops *ops, CORE_ADDR addr, gdb_byte *buf, |
b6591e8b AC |
1823 | LONGEST len) |
1824 | { | |
07b82ea5 PA |
1825 | /* This method is used to read from an alternate, non-current |
1826 | target. This read must bypass the overlay support (as symbols | |
1827 | don't match this target), and GDB's internal cache (wrong cache | |
1828 | for this target). */ | |
1829 | if (target_read (ops, TARGET_OBJECT_RAW_MEMORY, NULL, buf, addr, len) | |
b6591e8b | 1830 | != len) |
578d3588 | 1831 | memory_error (TARGET_XFER_E_IO, addr); |
b6591e8b AC |
1832 | } |
1833 | ||
1834 | ULONGEST | |
5d502164 MS |
1835 | get_target_memory_unsigned (struct target_ops *ops, CORE_ADDR addr, |
1836 | int len, enum bfd_endian byte_order) | |
b6591e8b | 1837 | { |
f6519ebc | 1838 | gdb_byte buf[sizeof (ULONGEST)]; |
b6591e8b AC |
1839 | |
1840 | gdb_assert (len <= sizeof (buf)); | |
1841 | get_target_memory (ops, addr, buf, len); | |
e17a4113 | 1842 | return extract_unsigned_integer (buf, len, byte_order); |
b6591e8b AC |
1843 | } |
1844 | ||
3db08215 MM |
1845 | /* See target.h. */ |
1846 | ||
d914c394 SS |
1847 | int |
1848 | target_insert_breakpoint (struct gdbarch *gdbarch, | |
1849 | struct bp_target_info *bp_tgt) | |
1850 | { | |
1851 | if (!may_insert_breakpoints) | |
1852 | { | |
1853 | warning (_("May not insert breakpoints")); | |
1854 | return 1; | |
1855 | } | |
1856 | ||
8b88a78e | 1857 | return current_top_target ()->insert_breakpoint (gdbarch, bp_tgt); |
d914c394 SS |
1858 | } |
1859 | ||
3db08215 MM |
1860 | /* See target.h. */ |
1861 | ||
d914c394 | 1862 | int |
6b84065d | 1863 | target_remove_breakpoint (struct gdbarch *gdbarch, |
73971819 PA |
1864 | struct bp_target_info *bp_tgt, |
1865 | enum remove_bp_reason reason) | |
d914c394 SS |
1866 | { |
1867 | /* This is kind of a weird case to handle, but the permission might | |
1868 | have been changed after breakpoints were inserted - in which case | |
1869 | we should just take the user literally and assume that any | |
1870 | breakpoints should be left in place. */ | |
1871 | if (!may_insert_breakpoints) | |
1872 | { | |
1873 | warning (_("May not remove breakpoints")); | |
1874 | return 1; | |
1875 | } | |
1876 | ||
8b88a78e | 1877 | return current_top_target ()->remove_breakpoint (gdbarch, bp_tgt, reason); |
d914c394 SS |
1878 | } |
1879 | ||
c906108c | 1880 | static void |
1d12d88f | 1881 | info_target_command (const char *args, int from_tty) |
c906108c | 1882 | { |
c906108c | 1883 | int has_all_mem = 0; |
c5aa993b | 1884 | |
c906108c | 1885 | if (symfile_objfile != NULL) |
4262abfb JK |
1886 | printf_unfiltered (_("Symbols from \"%s\".\n"), |
1887 | objfile_name (symfile_objfile)); | |
c906108c | 1888 | |
b6a8c27b | 1889 | for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
c906108c | 1890 | { |
f6ac5f3d | 1891 | if (!t->has_memory ()) |
c906108c SS |
1892 | continue; |
1893 | ||
66b4deae | 1894 | if ((int) (t->stratum ()) <= (int) dummy_stratum) |
c906108c SS |
1895 | continue; |
1896 | if (has_all_mem) | |
3e43a32a MS |
1897 | printf_unfiltered (_("\tWhile running this, " |
1898 | "GDB does not access memory from...\n")); | |
f6ac5f3d PA |
1899 | printf_unfiltered ("%s:\n", t->longname ()); |
1900 | t->files_info (); | |
1901 | has_all_mem = t->has_all_memory (); | |
c906108c SS |
1902 | } |
1903 | } | |
1904 | ||
fd79ecee DJ |
1905 | /* This function is called before any new inferior is created, e.g. |
1906 | by running a program, attaching, or connecting to a target. | |
1907 | It cleans up any state from previous invocations which might | |
1908 | change between runs. This is a subset of what target_preopen | |
1909 | resets (things which might change between targets). */ | |
1910 | ||
1911 | void | |
1912 | target_pre_inferior (int from_tty) | |
1913 | { | |
c378eb4e | 1914 | /* Clear out solib state. Otherwise the solib state of the previous |
b9db4ced | 1915 | inferior might have survived and is entirely wrong for the new |
c378eb4e | 1916 | target. This has been observed on GNU/Linux using glibc 2.3. How |
b9db4ced UW |
1917 | to reproduce: |
1918 | ||
1919 | bash$ ./foo& | |
1920 | [1] 4711 | |
1921 | bash$ ./foo& | |
1922 | [1] 4712 | |
1923 | bash$ gdb ./foo | |
1924 | [...] | |
1925 | (gdb) attach 4711 | |
1926 | (gdb) detach | |
1927 | (gdb) attach 4712 | |
1928 | Cannot access memory at address 0xdeadbeef | |
1929 | */ | |
b9db4ced | 1930 | |
50c71eaf PA |
1931 | /* In some OSs, the shared library list is the same/global/shared |
1932 | across inferiors. If code is shared between processes, so are | |
1933 | memory regions and features. */ | |
f5656ead | 1934 | if (!gdbarch_has_global_solist (target_gdbarch ())) |
50c71eaf PA |
1935 | { |
1936 | no_shared_libraries (NULL, from_tty); | |
1937 | ||
1938 | invalidate_target_mem_regions (); | |
424163ea | 1939 | |
50c71eaf PA |
1940 | target_clear_description (); |
1941 | } | |
8ffcbaaf | 1942 | |
e9756d52 PP |
1943 | /* attach_flag may be set if the previous process associated with |
1944 | the inferior was attached to. */ | |
1945 | current_inferior ()->attach_flag = 0; | |
1946 | ||
5d5658a1 PA |
1947 | current_inferior ()->highest_thread_num = 0; |
1948 | ||
8ffcbaaf | 1949 | agent_capability_invalidate (); |
fd79ecee DJ |
1950 | } |
1951 | ||
b8fa0bfa PA |
1952 | /* Callback for iterate_over_inferiors. Gets rid of the given |
1953 | inferior. */ | |
1954 | ||
1955 | static int | |
1956 | dispose_inferior (struct inferior *inf, void *args) | |
1957 | { | |
9d4a934c AB |
1958 | /* Not all killed inferiors can, or will ever be, removed from the |
1959 | inferior list. Killed inferiors clearly don't need to be killed | |
1960 | again, so, we're done. */ | |
1961 | if (inf->pid == 0) | |
1962 | return 0; | |
1963 | ||
00431a78 PA |
1964 | thread_info *thread = any_thread_of_inferior (inf); |
1965 | if (thread != NULL) | |
b8fa0bfa | 1966 | { |
00431a78 | 1967 | switch_to_thread (thread); |
b8fa0bfa PA |
1968 | |
1969 | /* Core inferiors actually should be detached, not killed. */ | |
1970 | if (target_has_execution) | |
1971 | target_kill (); | |
1972 | else | |
6e1e1966 | 1973 | target_detach (inf, 0); |
b8fa0bfa PA |
1974 | } |
1975 | ||
1976 | return 0; | |
1977 | } | |
1978 | ||
c906108c SS |
1979 | /* This is to be called by the open routine before it does |
1980 | anything. */ | |
1981 | ||
1982 | void | |
fba45db2 | 1983 | target_preopen (int from_tty) |
c906108c | 1984 | { |
c5aa993b | 1985 | dont_repeat (); |
c906108c | 1986 | |
b8fa0bfa | 1987 | if (have_inferiors ()) |
c5aa993b | 1988 | { |
adf40b2e | 1989 | if (!from_tty |
b8fa0bfa PA |
1990 | || !have_live_inferiors () |
1991 | || query (_("A program is being debugged already. Kill it? "))) | |
1992 | iterate_over_inferiors (dispose_inferior, NULL); | |
c906108c | 1993 | else |
8a3fe4f8 | 1994 | error (_("Program not killed.")); |
c906108c SS |
1995 | } |
1996 | ||
1997 | /* Calling target_kill may remove the target from the stack. But if | |
1998 | it doesn't (which seems like a win for UDI), remove it now. */ | |
87ab71f0 PA |
1999 | /* Leave the exec target, though. The user may be switching from a |
2000 | live process to a core of the same program. */ | |
460014f5 | 2001 | pop_all_targets_above (file_stratum); |
fd79ecee DJ |
2002 | |
2003 | target_pre_inferior (from_tty); | |
c906108c SS |
2004 | } |
2005 | ||
6bd6f3b6 | 2006 | /* See target.h. */ |
c906108c SS |
2007 | |
2008 | void | |
6e1e1966 | 2009 | target_detach (inferior *inf, int from_tty) |
c906108c | 2010 | { |
6e1e1966 SM |
2011 | /* As long as some to_detach implementations rely on the current_inferior |
2012 | (either directly, or indirectly, like through target_gdbarch or by | |
2013 | reading memory), INF needs to be the current inferior. When that | |
2014 | requirement will become no longer true, then we can remove this | |
2015 | assertion. */ | |
2016 | gdb_assert (inf == current_inferior ()); | |
2017 | ||
f5656ead | 2018 | if (gdbarch_has_global_breakpoints (target_gdbarch ())) |
50c71eaf PA |
2019 | /* Don't remove global breakpoints here. They're removed on |
2020 | disconnection from the target. */ | |
2021 | ; | |
2022 | else | |
2023 | /* If we're in breakpoints-always-inserted mode, have to remove | |
00431a78 PA |
2024 | breakpoints before detaching. */ |
2025 | remove_breakpoints_inf (current_inferior ()); | |
74960c60 | 2026 | |
24291992 PA |
2027 | prepare_for_detach (); |
2028 | ||
8b88a78e | 2029 | current_top_target ()->detach (inf, from_tty); |
799efbe8 PW |
2030 | |
2031 | /* After we have detached, clear the register cache for this inferior. */ | |
2032 | ptid_t pid_ptid = ptid_t (inf->pid); | |
2033 | ||
2034 | registers_changed_ptid (pid_ptid); | |
2035 | ||
2036 | /* We have to ensure we have no frame cache left. Normally, | |
2037 | registers_changed_ptid (pid_ptid) calls reinit_frame_cache when | |
2038 | inferior_ptid matches pid_ptid, but in our case, it does not | |
2039 | call it, as inferior_ptid has been reset. */ | |
2040 | reinit_frame_cache (); | |
c906108c SS |
2041 | } |
2042 | ||
6ad8ae5c | 2043 | void |
fee354ee | 2044 | target_disconnect (const char *args, int from_tty) |
6ad8ae5c | 2045 | { |
50c71eaf PA |
2046 | /* If we're in breakpoints-always-inserted mode or if breakpoints |
2047 | are global across processes, we have to remove them before | |
2048 | disconnecting. */ | |
74960c60 VP |
2049 | remove_breakpoints (); |
2050 | ||
8b88a78e | 2051 | current_top_target ()->disconnect (args, from_tty); |
6ad8ae5c DJ |
2052 | } |
2053 | ||
f2b9e3df SDJ |
2054 | /* See target/target.h. */ |
2055 | ||
117de6a9 | 2056 | ptid_t |
47608cb1 | 2057 | target_wait (ptid_t ptid, struct target_waitstatus *status, int options) |
117de6a9 | 2058 | { |
8b88a78e | 2059 | return current_top_target ()->wait (ptid, status, options); |
117de6a9 PA |
2060 | } |
2061 | ||
0b333c5e PA |
2062 | /* See target.h. */ |
2063 | ||
2064 | ptid_t | |
2065 | default_target_wait (struct target_ops *ops, | |
2066 | ptid_t ptid, struct target_waitstatus *status, | |
2067 | int options) | |
2068 | { | |
2069 | status->kind = TARGET_WAITKIND_IGNORE; | |
2070 | return minus_one_ptid; | |
2071 | } | |
2072 | ||
7a114964 | 2073 | const char * |
117de6a9 PA |
2074 | target_pid_to_str (ptid_t ptid) |
2075 | { | |
8b88a78e | 2076 | return current_top_target ()->pid_to_str (ptid); |
117de6a9 PA |
2077 | } |
2078 | ||
73ede765 | 2079 | const char * |
4694da01 TT |
2080 | target_thread_name (struct thread_info *info) |
2081 | { | |
8b88a78e | 2082 | return current_top_target ()->thread_name (info); |
4694da01 TT |
2083 | } |
2084 | ||
e04ee09e KB |
2085 | struct thread_info * |
2086 | target_thread_handle_to_thread_info (const gdb_byte *thread_handle, | |
2087 | int handle_len, | |
2088 | struct inferior *inf) | |
2089 | { | |
8b88a78e | 2090 | return current_top_target ()->thread_handle_to_thread_info (thread_handle, |
f6ac5f3d | 2091 | handle_len, inf); |
e04ee09e KB |
2092 | } |
2093 | ||
e1ac3328 | 2094 | void |
2ea28649 | 2095 | target_resume (ptid_t ptid, int step, enum gdb_signal signal) |
e1ac3328 | 2096 | { |
4e5d721f | 2097 | target_dcache_invalidate (); |
28439f5e | 2098 | |
8b88a78e | 2099 | current_top_target ()->resume (ptid, step, signal); |
28439f5e | 2100 | |
6b84065d | 2101 | registers_changed_ptid (ptid); |
251bde03 | 2102 | /* We only set the internal executing state here. The user/frontend |
f2ffa92b PA |
2103 | running state is set at a higher level. This also clears the |
2104 | thread's stop_pc as side effect. */ | |
6b84065d | 2105 | set_executing (ptid, 1); |
6b84065d | 2106 | clear_inline_frame_state (ptid); |
e1ac3328 | 2107 | } |
2455069d | 2108 | |
85ad3aaf PA |
2109 | /* If true, target_commit_resume is a nop. */ |
2110 | static int defer_target_commit_resume; | |
2111 | ||
2112 | /* See target.h. */ | |
2113 | ||
2114 | void | |
2115 | target_commit_resume (void) | |
2116 | { | |
85ad3aaf PA |
2117 | if (defer_target_commit_resume) |
2118 | return; | |
2119 | ||
8b88a78e | 2120 | current_top_target ()->commit_resume (); |
85ad3aaf PA |
2121 | } |
2122 | ||
2123 | /* See target.h. */ | |
2124 | ||
a9bc57b9 TT |
2125 | scoped_restore_tmpl<int> |
2126 | make_scoped_defer_target_commit_resume () | |
85ad3aaf | 2127 | { |
a9bc57b9 | 2128 | return make_scoped_restore (&defer_target_commit_resume, 1); |
85ad3aaf PA |
2129 | } |
2130 | ||
2455069d | 2131 | void |
adc6a863 | 2132 | target_pass_signals (gdb::array_view<const unsigned char> pass_signals) |
2455069d | 2133 | { |
adc6a863 | 2134 | current_top_target ()->pass_signals (pass_signals); |
2455069d UW |
2135 | } |
2136 | ||
9b224c5e | 2137 | void |
adc6a863 | 2138 | target_program_signals (gdb::array_view<const unsigned char> program_signals) |
9b224c5e | 2139 | { |
adc6a863 | 2140 | current_top_target ()->program_signals (program_signals); |
9b224c5e PA |
2141 | } |
2142 | ||
098dba18 TT |
2143 | static int |
2144 | default_follow_fork (struct target_ops *self, int follow_child, | |
2145 | int detach_fork) | |
2146 | { | |
2147 | /* Some target returned a fork event, but did not know how to follow it. */ | |
2148 | internal_error (__FILE__, __LINE__, | |
2149 | _("could not find a target to follow fork")); | |
2150 | } | |
2151 | ||
ee057212 DJ |
2152 | /* Look through the list of possible targets for a target that can |
2153 | follow forks. */ | |
2154 | ||
2155 | int | |
07107ca6 | 2156 | target_follow_fork (int follow_child, int detach_fork) |
ee057212 | 2157 | { |
8b88a78e | 2158 | return current_top_target ()->follow_fork (follow_child, detach_fork); |
ee057212 DJ |
2159 | } |
2160 | ||
94585166 DB |
2161 | /* Target wrapper for follow exec hook. */ |
2162 | ||
2163 | void | |
2164 | target_follow_exec (struct inferior *inf, char *execd_pathname) | |
2165 | { | |
8b88a78e | 2166 | current_top_target ()->follow_exec (inf, execd_pathname); |
94585166 DB |
2167 | } |
2168 | ||
8d657035 TT |
2169 | static void |
2170 | default_mourn_inferior (struct target_ops *self) | |
2171 | { | |
2172 | internal_error (__FILE__, __LINE__, | |
2173 | _("could not find a target to follow mourn inferior")); | |
2174 | } | |
2175 | ||
136d6dae | 2176 | void |
bc1e6c81 | 2177 | target_mourn_inferior (ptid_t ptid) |
136d6dae | 2178 | { |
d7e15655 | 2179 | gdb_assert (ptid == inferior_ptid); |
8b88a78e | 2180 | current_top_target ()->mourn_inferior (); |
136d6dae | 2181 | |
8d657035 TT |
2182 | /* We no longer need to keep handles on any of the object files. |
2183 | Make sure to release them to avoid unnecessarily locking any | |
2184 | of them while we're not actually debugging. */ | |
2185 | bfd_cache_close_all (); | |
136d6dae VP |
2186 | } |
2187 | ||
424163ea DJ |
2188 | /* Look for a target which can describe architectural features, starting |
2189 | from TARGET. If we find one, return its description. */ | |
2190 | ||
2191 | const struct target_desc * | |
2192 | target_read_description (struct target_ops *target) | |
2193 | { | |
f6ac5f3d | 2194 | return target->read_description (); |
424163ea DJ |
2195 | } |
2196 | ||
58a5184e | 2197 | /* This implements a basic search of memory, reading target memory and |
08388c79 DE |
2198 | performing the search here (as opposed to performing the search in on the |
2199 | target side with, for example, gdbserver). */ | |
2200 | ||
2201 | int | |
2202 | simple_search_memory (struct target_ops *ops, | |
2203 | CORE_ADDR start_addr, ULONGEST search_space_len, | |
2204 | const gdb_byte *pattern, ULONGEST pattern_len, | |
2205 | CORE_ADDR *found_addrp) | |
2206 | { | |
2207 | /* NOTE: also defined in find.c testcase. */ | |
2208 | #define SEARCH_CHUNK_SIZE 16000 | |
2209 | const unsigned chunk_size = SEARCH_CHUNK_SIZE; | |
2210 | /* Buffer to hold memory contents for searching. */ | |
08388c79 | 2211 | unsigned search_buf_size; |
08388c79 DE |
2212 | |
2213 | search_buf_size = chunk_size + pattern_len - 1; | |
2214 | ||
2215 | /* No point in trying to allocate a buffer larger than the search space. */ | |
2216 | if (search_space_len < search_buf_size) | |
2217 | search_buf_size = search_space_len; | |
2218 | ||
26fcd5d7 | 2219 | gdb::byte_vector search_buf (search_buf_size); |
08388c79 DE |
2220 | |
2221 | /* Prime the search buffer. */ | |
2222 | ||
2223 | if (target_read (ops, TARGET_OBJECT_MEMORY, NULL, | |
26fcd5d7 TT |
2224 | search_buf.data (), start_addr, search_buf_size) |
2225 | != search_buf_size) | |
08388c79 | 2226 | { |
b3dc46ff AB |
2227 | warning (_("Unable to access %s bytes of target " |
2228 | "memory at %s, halting search."), | |
2229 | pulongest (search_buf_size), hex_string (start_addr)); | |
08388c79 DE |
2230 | return -1; |
2231 | } | |
2232 | ||
2233 | /* Perform the search. | |
2234 | ||
2235 | The loop is kept simple by allocating [N + pattern-length - 1] bytes. | |
2236 | When we've scanned N bytes we copy the trailing bytes to the start and | |
2237 | read in another N bytes. */ | |
2238 | ||
2239 | while (search_space_len >= pattern_len) | |
2240 | { | |
2241 | gdb_byte *found_ptr; | |
325fac50 PA |
2242 | unsigned nr_search_bytes |
2243 | = std::min (search_space_len, (ULONGEST) search_buf_size); | |
08388c79 | 2244 | |
26fcd5d7 | 2245 | found_ptr = (gdb_byte *) memmem (search_buf.data (), nr_search_bytes, |
d7f3ff3e | 2246 | pattern, pattern_len); |
08388c79 DE |
2247 | |
2248 | if (found_ptr != NULL) | |
2249 | { | |
26fcd5d7 | 2250 | CORE_ADDR found_addr = start_addr + (found_ptr - search_buf.data ()); |
5d502164 | 2251 | |
08388c79 | 2252 | *found_addrp = found_addr; |
08388c79 DE |
2253 | return 1; |
2254 | } | |
2255 | ||
2256 | /* Not found in this chunk, skip to next chunk. */ | |
2257 | ||
2258 | /* Don't let search_space_len wrap here, it's unsigned. */ | |
2259 | if (search_space_len >= chunk_size) | |
2260 | search_space_len -= chunk_size; | |
2261 | else | |
2262 | search_space_len = 0; | |
2263 | ||
2264 | if (search_space_len >= pattern_len) | |
2265 | { | |
2266 | unsigned keep_len = search_buf_size - chunk_size; | |
8a35fb51 | 2267 | CORE_ADDR read_addr = start_addr + chunk_size + keep_len; |
08388c79 DE |
2268 | int nr_to_read; |
2269 | ||
2270 | /* Copy the trailing part of the previous iteration to the front | |
2271 | of the buffer for the next iteration. */ | |
2272 | gdb_assert (keep_len == pattern_len - 1); | |
26fcd5d7 | 2273 | memcpy (&search_buf[0], &search_buf[chunk_size], keep_len); |
08388c79 | 2274 | |
325fac50 PA |
2275 | nr_to_read = std::min (search_space_len - keep_len, |
2276 | (ULONGEST) chunk_size); | |
08388c79 DE |
2277 | |
2278 | if (target_read (ops, TARGET_OBJECT_MEMORY, NULL, | |
26fcd5d7 | 2279 | &search_buf[keep_len], read_addr, |
08388c79 DE |
2280 | nr_to_read) != nr_to_read) |
2281 | { | |
b3dc46ff | 2282 | warning (_("Unable to access %s bytes of target " |
9b20d036 | 2283 | "memory at %s, halting search."), |
b3dc46ff | 2284 | plongest (nr_to_read), |
08388c79 | 2285 | hex_string (read_addr)); |
08388c79 DE |
2286 | return -1; |
2287 | } | |
2288 | ||
2289 | start_addr += chunk_size; | |
2290 | } | |
2291 | } | |
2292 | ||
2293 | /* Not found. */ | |
2294 | ||
08388c79 DE |
2295 | return 0; |
2296 | } | |
2297 | ||
58a5184e TT |
2298 | /* Default implementation of memory-searching. */ |
2299 | ||
2300 | static int | |
2301 | default_search_memory (struct target_ops *self, | |
2302 | CORE_ADDR start_addr, ULONGEST search_space_len, | |
2303 | const gdb_byte *pattern, ULONGEST pattern_len, | |
2304 | CORE_ADDR *found_addrp) | |
2305 | { | |
2306 | /* Start over from the top of the target stack. */ | |
8b88a78e | 2307 | return simple_search_memory (current_top_target (), |
58a5184e TT |
2308 | start_addr, search_space_len, |
2309 | pattern, pattern_len, found_addrp); | |
2310 | } | |
2311 | ||
08388c79 DE |
2312 | /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the |
2313 | sequence of bytes in PATTERN with length PATTERN_LEN. | |
2314 | ||
2315 | The result is 1 if found, 0 if not found, and -1 if there was an error | |
2316 | requiring halting of the search (e.g. memory read error). | |
2317 | If the pattern is found the address is recorded in FOUND_ADDRP. */ | |
2318 | ||
2319 | int | |
2320 | target_search_memory (CORE_ADDR start_addr, ULONGEST search_space_len, | |
2321 | const gdb_byte *pattern, ULONGEST pattern_len, | |
2322 | CORE_ADDR *found_addrp) | |
2323 | { | |
8b88a78e | 2324 | return current_top_target ()->search_memory (start_addr, search_space_len, |
f6ac5f3d | 2325 | pattern, pattern_len, found_addrp); |
08388c79 DE |
2326 | } |
2327 | ||
8edfe269 DJ |
2328 | /* Look through the currently pushed targets. If none of them will |
2329 | be able to restart the currently running process, issue an error | |
2330 | message. */ | |
2331 | ||
2332 | void | |
2333 | target_require_runnable (void) | |
2334 | { | |
b6a8c27b | 2335 | for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
8edfe269 DJ |
2336 | { |
2337 | /* If this target knows how to create a new program, then | |
2338 | assume we will still be able to after killing the current | |
2339 | one. Either killing and mourning will not pop T, or else | |
2340 | find_default_run_target will find it again. */ | |
f6ac5f3d | 2341 | if (t->can_create_inferior ()) |
8edfe269 DJ |
2342 | return; |
2343 | ||
548740d6 | 2344 | /* Do not worry about targets at certain strata that can not |
8edfe269 DJ |
2345 | create inferiors. Assume they will be pushed again if |
2346 | necessary, and continue to the process_stratum. */ | |
66b4deae | 2347 | if (t->stratum () > process_stratum) |
8edfe269 DJ |
2348 | continue; |
2349 | ||
3e43a32a MS |
2350 | error (_("The \"%s\" target does not support \"run\". " |
2351 | "Try \"help target\" or \"continue\"."), | |
f6ac5f3d | 2352 | t->shortname ()); |
8edfe269 DJ |
2353 | } |
2354 | ||
2355 | /* This function is only called if the target is running. In that | |
2356 | case there should have been a process_stratum target and it | |
c378eb4e | 2357 | should either know how to create inferiors, or not... */ |
9b20d036 | 2358 | internal_error (__FILE__, __LINE__, _("No targets found")); |
8edfe269 DJ |
2359 | } |
2360 | ||
6a3cb8e8 PA |
2361 | /* Whether GDB is allowed to fall back to the default run target for |
2362 | "run", "attach", etc. when no target is connected yet. */ | |
2363 | static int auto_connect_native_target = 1; | |
2364 | ||
2365 | static void | |
2366 | show_auto_connect_native_target (struct ui_file *file, int from_tty, | |
2367 | struct cmd_list_element *c, const char *value) | |
2368 | { | |
2369 | fprintf_filtered (file, | |
2370 | _("Whether GDB may automatically connect to the " | |
2371 | "native target is %s.\n"), | |
2372 | value); | |
2373 | } | |
2374 | ||
d9f719f1 PA |
2375 | /* A pointer to the target that can respond to "run" or "attach". |
2376 | Native targets are always singletons and instantiated early at GDB | |
2377 | startup. */ | |
2378 | static target_ops *the_native_target; | |
2379 | ||
2380 | /* See target.h. */ | |
2381 | ||
2382 | void | |
2383 | set_native_target (target_ops *target) | |
2384 | { | |
2385 | if (the_native_target != NULL) | |
2386 | internal_error (__FILE__, __LINE__, | |
2387 | _("native target already set (\"%s\")."), | |
2388 | the_native_target->longname ()); | |
2389 | ||
2390 | the_native_target = target; | |
2391 | } | |
2392 | ||
2393 | /* See target.h. */ | |
2394 | ||
2395 | target_ops * | |
2396 | get_native_target () | |
2397 | { | |
2398 | return the_native_target; | |
2399 | } | |
2400 | ||
c906108c SS |
2401 | /* Look through the list of possible targets for a target that can |
2402 | execute a run or attach command without any other data. This is | |
2403 | used to locate the default process stratum. | |
2404 | ||
5f667f2d PA |
2405 | If DO_MESG is not NULL, the result is always valid (error() is |
2406 | called for errors); else, return NULL on error. */ | |
c906108c SS |
2407 | |
2408 | static struct target_ops * | |
a121b7c1 | 2409 | find_default_run_target (const char *do_mesg) |
c906108c | 2410 | { |
d9f719f1 PA |
2411 | if (auto_connect_native_target && the_native_target != NULL) |
2412 | return the_native_target; | |
c906108c | 2413 | |
d9f719f1 PA |
2414 | if (do_mesg != NULL) |
2415 | error (_("Don't know how to %s. Try \"help target\"."), do_mesg); | |
2416 | return NULL; | |
c906108c SS |
2417 | } |
2418 | ||
b3ccfe11 | 2419 | /* See target.h. */ |
c906108c | 2420 | |
b3ccfe11 TT |
2421 | struct target_ops * |
2422 | find_attach_target (void) | |
c906108c | 2423 | { |
b3ccfe11 | 2424 | /* If a target on the current stack can attach, use it. */ |
b6a8c27b | 2425 | for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
b3ccfe11 | 2426 | { |
f6ac5f3d | 2427 | if (t->can_attach ()) |
d9f719f1 | 2428 | return t; |
b3ccfe11 | 2429 | } |
c906108c | 2430 | |
b3ccfe11 | 2431 | /* Otherwise, use the default run target for attaching. */ |
d9f719f1 | 2432 | return find_default_run_target ("attach"); |
b84876c2 PA |
2433 | } |
2434 | ||
b3ccfe11 | 2435 | /* See target.h. */ |
b84876c2 | 2436 | |
b3ccfe11 TT |
2437 | struct target_ops * |
2438 | find_run_target (void) | |
9908b566 | 2439 | { |
f6ac5f3d | 2440 | /* If a target on the current stack can run, use it. */ |
b6a8c27b | 2441 | for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
b3ccfe11 | 2442 | { |
f6ac5f3d | 2443 | if (t->can_create_inferior ()) |
d9f719f1 | 2444 | return t; |
b3ccfe11 | 2445 | } |
5d502164 | 2446 | |
b3ccfe11 | 2447 | /* Otherwise, use the default run target. */ |
d9f719f1 | 2448 | return find_default_run_target ("run"); |
9908b566 VP |
2449 | } |
2450 | ||
f6ac5f3d PA |
2451 | bool |
2452 | target_ops::info_proc (const char *args, enum info_proc_what what) | |
2453 | { | |
2454 | return false; | |
2455 | } | |
2456 | ||
145b16a9 UW |
2457 | /* Implement the "info proc" command. */ |
2458 | ||
451b7c33 | 2459 | int |
7bc112c1 | 2460 | target_info_proc (const char *args, enum info_proc_what what) |
145b16a9 UW |
2461 | { |
2462 | struct target_ops *t; | |
2463 | ||
2464 | /* If we're already connected to something that can get us OS | |
2465 | related data, use it. Otherwise, try using the native | |
2466 | target. */ | |
f6ac5f3d PA |
2467 | t = find_target_at (process_stratum); |
2468 | if (t == NULL) | |
145b16a9 UW |
2469 | t = find_default_run_target (NULL); |
2470 | ||
b6a8c27b | 2471 | for (; t != NULL; t = t->beneath ()) |
145b16a9 | 2472 | { |
f6ac5f3d | 2473 | if (t->info_proc (args, what)) |
145b16a9 | 2474 | { |
145b16a9 UW |
2475 | if (targetdebug) |
2476 | fprintf_unfiltered (gdb_stdlog, | |
2477 | "target_info_proc (\"%s\", %d)\n", args, what); | |
2478 | ||
451b7c33 | 2479 | return 1; |
145b16a9 UW |
2480 | } |
2481 | } | |
2482 | ||
451b7c33 | 2483 | return 0; |
145b16a9 UW |
2484 | } |
2485 | ||
03583c20 | 2486 | static int |
2bfc0540 | 2487 | find_default_supports_disable_randomization (struct target_ops *self) |
03583c20 UW |
2488 | { |
2489 | struct target_ops *t; | |
2490 | ||
2491 | t = find_default_run_target (NULL); | |
f6ac5f3d PA |
2492 | if (t != NULL) |
2493 | return t->supports_disable_randomization (); | |
03583c20 UW |
2494 | return 0; |
2495 | } | |
2496 | ||
2497 | int | |
2498 | target_supports_disable_randomization (void) | |
2499 | { | |
8b88a78e | 2500 | return current_top_target ()->supports_disable_randomization (); |
03583c20 | 2501 | } |
9908b566 | 2502 | |
1fb77080 SDJ |
2503 | /* See target/target.h. */ |
2504 | ||
2505 | int | |
2506 | target_supports_multi_process (void) | |
2507 | { | |
8b88a78e | 2508 | return current_top_target ()->supports_multi_process (); |
1fb77080 SDJ |
2509 | } |
2510 | ||
b7b030ad TT |
2511 | /* See target.h. */ |
2512 | ||
9018be22 | 2513 | gdb::optional<gdb::char_vector> |
07e059b5 VP |
2514 | target_get_osdata (const char *type) |
2515 | { | |
07e059b5 VP |
2516 | struct target_ops *t; |
2517 | ||
739ef7fb PA |
2518 | /* If we're already connected to something that can get us OS |
2519 | related data, use it. Otherwise, try using the native | |
2520 | target. */ | |
f6ac5f3d PA |
2521 | t = find_target_at (process_stratum); |
2522 | if (t == NULL) | |
739ef7fb | 2523 | t = find_default_run_target ("get OS data"); |
07e059b5 VP |
2524 | |
2525 | if (!t) | |
9018be22 | 2526 | return {}; |
07e059b5 | 2527 | |
6d097e65 | 2528 | return target_read_stralloc (t, TARGET_OBJECT_OSDATA, type); |
07e059b5 VP |
2529 | } |
2530 | ||
6c95b8df | 2531 | |
8eaff7cd TT |
2532 | /* Determine the current address space of thread PTID. */ |
2533 | ||
2534 | struct address_space * | |
2535 | target_thread_address_space (ptid_t ptid) | |
2536 | { | |
2537 | struct address_space *aspace; | |
2538 | ||
8b88a78e | 2539 | aspace = current_top_target ()->thread_address_space (ptid); |
8eaff7cd TT |
2540 | gdb_assert (aspace != NULL); |
2541 | ||
8eaff7cd TT |
2542 | return aspace; |
2543 | } | |
2544 | ||
b6a8c27b PA |
2545 | /* See target.h. */ |
2546 | ||
2547 | target_ops * | |
2548 | target_ops::beneath () const | |
2549 | { | |
a1740ee1 | 2550 | return g_target_stack.find_beneath (this); |
b6a8c27b PA |
2551 | } |
2552 | ||
f6ac5f3d PA |
2553 | void |
2554 | target_ops::close () | |
2555 | { | |
2556 | } | |
2557 | ||
2558 | bool | |
2559 | target_ops::can_attach () | |
2560 | { | |
2561 | return 0; | |
2562 | } | |
2563 | ||
2564 | void | |
2565 | target_ops::attach (const char *, int) | |
2566 | { | |
2567 | gdb_assert_not_reached ("target_ops::attach called"); | |
2568 | } | |
2569 | ||
2570 | bool | |
2571 | target_ops::can_create_inferior () | |
2572 | { | |
2573 | return 0; | |
2574 | } | |
2575 | ||
2576 | void | |
2577 | target_ops::create_inferior (const char *, const std::string &, | |
2578 | char **, int) | |
2579 | { | |
2580 | gdb_assert_not_reached ("target_ops::create_inferior called"); | |
2581 | } | |
2582 | ||
57810aa7 | 2583 | bool |
f6ac5f3d PA |
2584 | target_ops::can_run () |
2585 | { | |
57810aa7 | 2586 | return false; |
f6ac5f3d PA |
2587 | } |
2588 | ||
2589 | int | |
2590 | target_can_run () | |
2591 | { | |
b6a8c27b | 2592 | for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
f6ac5f3d PA |
2593 | { |
2594 | if (t->can_run ()) | |
2595 | return 1; | |
2596 | } | |
2597 | ||
2598 | return 0; | |
2599 | } | |
7313baad UW |
2600 | |
2601 | /* Target file operations. */ | |
2602 | ||
2603 | static struct target_ops * | |
2604 | default_fileio_target (void) | |
2605 | { | |
f6ac5f3d PA |
2606 | struct target_ops *t; |
2607 | ||
7313baad UW |
2608 | /* If we're already connected to something that can perform |
2609 | file I/O, use it. Otherwise, try using the native target. */ | |
f6ac5f3d PA |
2610 | t = find_target_at (process_stratum); |
2611 | if (t != NULL) | |
2612 | return t; | |
2613 | return find_default_run_target ("file I/O"); | |
7313baad UW |
2614 | } |
2615 | ||
1c4b552b GB |
2616 | /* File handle for target file operations. */ |
2617 | ||
5ff79300 | 2618 | struct fileio_fh_t |
1c4b552b | 2619 | { |
20db9c52 PA |
2620 | /* The target on which this file is open. NULL if the target is |
2621 | meanwhile closed while the handle is open. */ | |
5ff79300 | 2622 | target_ops *target; |
1c4b552b GB |
2623 | |
2624 | /* The file descriptor on the target. */ | |
5ff79300 | 2625 | int target_fd; |
1c4b552b | 2626 | |
5ff79300 PA |
2627 | /* Check whether this fileio_fh_t represents a closed file. */ |
2628 | bool is_closed () | |
2629 | { | |
2630 | return target_fd < 0; | |
2631 | } | |
2632 | }; | |
1c4b552b GB |
2633 | |
2634 | /* Vector of currently open file handles. The value returned by | |
2635 | target_fileio_open and passed as the FD argument to other | |
2636 | target_fileio_* functions is an index into this vector. This | |
2637 | vector's entries are never freed; instead, files are marked as | |
2638 | closed, and the handle becomes available for reuse. */ | |
5ff79300 | 2639 | static std::vector<fileio_fh_t> fileio_fhandles; |
1c4b552b GB |
2640 | |
2641 | /* Index into fileio_fhandles of the lowest handle that might be | |
2642 | closed. This permits handle reuse without searching the whole | |
2643 | list each time a new file is opened. */ | |
2644 | static int lowest_closed_fd; | |
2645 | ||
20db9c52 PA |
2646 | /* Invalidate the target associated with open handles that were open |
2647 | on target TARG, since we're about to close (and maybe destroy) the | |
2648 | target. The handles remain open from the client's perspective, but | |
2649 | trying to do anything with them other than closing them will fail | |
2650 | with EIO. */ | |
2651 | ||
2652 | static void | |
2653 | fileio_handles_invalidate_target (target_ops *targ) | |
2654 | { | |
2655 | for (fileio_fh_t &fh : fileio_fhandles) | |
2656 | if (fh.target == targ) | |
2657 | fh.target = NULL; | |
2658 | } | |
2659 | ||
1c4b552b GB |
2660 | /* Acquire a target fileio file descriptor. */ |
2661 | ||
2662 | static int | |
5ff79300 | 2663 | acquire_fileio_fd (target_ops *target, int target_fd) |
1c4b552b | 2664 | { |
1c4b552b | 2665 | /* Search for closed handles to reuse. */ |
5ff79300 PA |
2666 | for (; lowest_closed_fd < fileio_fhandles.size (); lowest_closed_fd++) |
2667 | { | |
2668 | fileio_fh_t &fh = fileio_fhandles[lowest_closed_fd]; | |
2669 | ||
2670 | if (fh.is_closed ()) | |
2671 | break; | |
2672 | } | |
1c4b552b GB |
2673 | |
2674 | /* Push a new handle if no closed handles were found. */ | |
5ff79300 PA |
2675 | if (lowest_closed_fd == fileio_fhandles.size ()) |
2676 | fileio_fhandles.push_back (fileio_fh_t {target, target_fd}); | |
2677 | else | |
2678 | fileio_fhandles[lowest_closed_fd] = {target, target_fd}; | |
1c4b552b | 2679 | |
5ff79300 PA |
2680 | /* Should no longer be marked closed. */ |
2681 | gdb_assert (!fileio_fhandles[lowest_closed_fd].is_closed ()); | |
1c4b552b GB |
2682 | |
2683 | /* Return its index, and start the next lookup at | |
2684 | the next index. */ | |
2685 | return lowest_closed_fd++; | |
2686 | } | |
2687 | ||
2688 | /* Release a target fileio file descriptor. */ | |
2689 | ||
2690 | static void | |
2691 | release_fileio_fd (int fd, fileio_fh_t *fh) | |
2692 | { | |
5ff79300 | 2693 | fh->target_fd = -1; |
325fac50 | 2694 | lowest_closed_fd = std::min (lowest_closed_fd, fd); |
1c4b552b GB |
2695 | } |
2696 | ||
2697 | /* Return a pointer to the fileio_fhandle_t corresponding to FD. */ | |
2698 | ||
5ff79300 PA |
2699 | static fileio_fh_t * |
2700 | fileio_fd_to_fh (int fd) | |
2701 | { | |
2702 | return &fileio_fhandles[fd]; | |
2703 | } | |
1c4b552b | 2704 | |
f6ac5f3d PA |
2705 | |
2706 | /* Default implementations of file i/o methods. We don't want these | |
2707 | to delegate automatically, because we need to know which target | |
2708 | supported the method, in order to call it directly from within | |
2709 | pread/pwrite, etc. */ | |
2710 | ||
2711 | int | |
2712 | target_ops::fileio_open (struct inferior *inf, const char *filename, | |
2713 | int flags, int mode, int warn_if_slow, | |
2714 | int *target_errno) | |
2715 | { | |
2716 | *target_errno = FILEIO_ENOSYS; | |
2717 | return -1; | |
2718 | } | |
2719 | ||
2720 | int | |
2721 | target_ops::fileio_pwrite (int fd, const gdb_byte *write_buf, int len, | |
2722 | ULONGEST offset, int *target_errno) | |
2723 | { | |
2724 | *target_errno = FILEIO_ENOSYS; | |
2725 | return -1; | |
2726 | } | |
2727 | ||
2728 | int | |
2729 | target_ops::fileio_pread (int fd, gdb_byte *read_buf, int len, | |
2730 | ULONGEST offset, int *target_errno) | |
2731 | { | |
2732 | *target_errno = FILEIO_ENOSYS; | |
2733 | return -1; | |
2734 | } | |
2735 | ||
2736 | int | |
2737 | target_ops::fileio_fstat (int fd, struct stat *sb, int *target_errno) | |
2738 | { | |
2739 | *target_errno = FILEIO_ENOSYS; | |
2740 | return -1; | |
2741 | } | |
2742 | ||
2743 | int | |
2744 | target_ops::fileio_close (int fd, int *target_errno) | |
2745 | { | |
2746 | *target_errno = FILEIO_ENOSYS; | |
2747 | return -1; | |
2748 | } | |
2749 | ||
2750 | int | |
2751 | target_ops::fileio_unlink (struct inferior *inf, const char *filename, | |
2752 | int *target_errno) | |
2753 | { | |
2754 | *target_errno = FILEIO_ENOSYS; | |
2755 | return -1; | |
2756 | } | |
2757 | ||
2758 | gdb::optional<std::string> | |
2759 | target_ops::fileio_readlink (struct inferior *inf, const char *filename, | |
2760 | int *target_errno) | |
2761 | { | |
2762 | *target_errno = FILEIO_ENOSYS; | |
2763 | return {}; | |
2764 | } | |
2765 | ||
4313b8c0 GB |
2766 | /* Helper for target_fileio_open and |
2767 | target_fileio_open_warn_if_slow. */ | |
12e2a5fd | 2768 | |
4313b8c0 GB |
2769 | static int |
2770 | target_fileio_open_1 (struct inferior *inf, const char *filename, | |
2771 | int flags, int mode, int warn_if_slow, | |
2772 | int *target_errno) | |
7313baad | 2773 | { |
b6a8c27b | 2774 | for (target_ops *t = default_fileio_target (); t != NULL; t = t->beneath ()) |
7313baad | 2775 | { |
f6ac5f3d PA |
2776 | int fd = t->fileio_open (inf, filename, flags, mode, |
2777 | warn_if_slow, target_errno); | |
7313baad | 2778 | |
f6ac5f3d PA |
2779 | if (fd == -1 && *target_errno == FILEIO_ENOSYS) |
2780 | continue; | |
1c4b552b | 2781 | |
f6ac5f3d PA |
2782 | if (fd < 0) |
2783 | fd = -1; | |
2784 | else | |
2785 | fd = acquire_fileio_fd (t, fd); | |
2786 | ||
2787 | if (targetdebug) | |
2788 | fprintf_unfiltered (gdb_stdlog, | |
4313b8c0 | 2789 | "target_fileio_open (%d,%s,0x%x,0%o,%d)" |
07c138c8 GB |
2790 | " = %d (%d)\n", |
2791 | inf == NULL ? 0 : inf->num, | |
7313baad | 2792 | filename, flags, mode, |
4313b8c0 GB |
2793 | warn_if_slow, fd, |
2794 | fd != -1 ? 0 : *target_errno); | |
f6ac5f3d | 2795 | return fd; |
7313baad UW |
2796 | } |
2797 | ||
2798 | *target_errno = FILEIO_ENOSYS; | |
2799 | return -1; | |
2800 | } | |
2801 | ||
12e2a5fd GB |
2802 | /* See target.h. */ |
2803 | ||
4313b8c0 GB |
2804 | int |
2805 | target_fileio_open (struct inferior *inf, const char *filename, | |
2806 | int flags, int mode, int *target_errno) | |
2807 | { | |
2808 | return target_fileio_open_1 (inf, filename, flags, mode, 0, | |
2809 | target_errno); | |
2810 | } | |
2811 | ||
2812 | /* See target.h. */ | |
2813 | ||
2814 | int | |
2815 | target_fileio_open_warn_if_slow (struct inferior *inf, | |
2816 | const char *filename, | |
2817 | int flags, int mode, int *target_errno) | |
2818 | { | |
2819 | return target_fileio_open_1 (inf, filename, flags, mode, 1, | |
2820 | target_errno); | |
2821 | } | |
2822 | ||
2823 | /* See target.h. */ | |
2824 | ||
7313baad UW |
2825 | int |
2826 | target_fileio_pwrite (int fd, const gdb_byte *write_buf, int len, | |
2827 | ULONGEST offset, int *target_errno) | |
2828 | { | |
1c4b552b GB |
2829 | fileio_fh_t *fh = fileio_fd_to_fh (fd); |
2830 | int ret = -1; | |
7313baad | 2831 | |
5ff79300 | 2832 | if (fh->is_closed ()) |
1c4b552b | 2833 | *target_errno = EBADF; |
20db9c52 PA |
2834 | else if (fh->target == NULL) |
2835 | *target_errno = EIO; | |
1c4b552b | 2836 | else |
f6ac5f3d PA |
2837 | ret = fh->target->fileio_pwrite (fh->target_fd, write_buf, |
2838 | len, offset, target_errno); | |
7313baad | 2839 | |
1c4b552b GB |
2840 | if (targetdebug) |
2841 | fprintf_unfiltered (gdb_stdlog, | |
2842 | "target_fileio_pwrite (%d,...,%d,%s) " | |
2843 | "= %d (%d)\n", | |
2844 | fd, len, pulongest (offset), | |
2845 | ret, ret != -1 ? 0 : *target_errno); | |
2846 | return ret; | |
7313baad UW |
2847 | } |
2848 | ||
12e2a5fd GB |
2849 | /* See target.h. */ |
2850 | ||
7313baad UW |
2851 | int |
2852 | target_fileio_pread (int fd, gdb_byte *read_buf, int len, | |
2853 | ULONGEST offset, int *target_errno) | |
2854 | { | |
1c4b552b GB |
2855 | fileio_fh_t *fh = fileio_fd_to_fh (fd); |
2856 | int ret = -1; | |
7313baad | 2857 | |
5ff79300 | 2858 | if (fh->is_closed ()) |
1c4b552b | 2859 | *target_errno = EBADF; |
20db9c52 PA |
2860 | else if (fh->target == NULL) |
2861 | *target_errno = EIO; | |
1c4b552b | 2862 | else |
f6ac5f3d PA |
2863 | ret = fh->target->fileio_pread (fh->target_fd, read_buf, |
2864 | len, offset, target_errno); | |
7313baad | 2865 | |
1c4b552b GB |
2866 | if (targetdebug) |
2867 | fprintf_unfiltered (gdb_stdlog, | |
2868 | "target_fileio_pread (%d,...,%d,%s) " | |
2869 | "= %d (%d)\n", | |
2870 | fd, len, pulongest (offset), | |
2871 | ret, ret != -1 ? 0 : *target_errno); | |
9b15c1f0 GB |
2872 | return ret; |
2873 | } | |
2874 | ||
2875 | /* See target.h. */ | |
12e2a5fd | 2876 | |
9b15c1f0 GB |
2877 | int |
2878 | target_fileio_fstat (int fd, struct stat *sb, int *target_errno) | |
2879 | { | |
2880 | fileio_fh_t *fh = fileio_fd_to_fh (fd); | |
2881 | int ret = -1; | |
2882 | ||
5ff79300 | 2883 | if (fh->is_closed ()) |
9b15c1f0 | 2884 | *target_errno = EBADF; |
20db9c52 PA |
2885 | else if (fh->target == NULL) |
2886 | *target_errno = EIO; | |
9b15c1f0 | 2887 | else |
f6ac5f3d | 2888 | ret = fh->target->fileio_fstat (fh->target_fd, sb, target_errno); |
9b15c1f0 GB |
2889 | |
2890 | if (targetdebug) | |
2891 | fprintf_unfiltered (gdb_stdlog, | |
2892 | "target_fileio_fstat (%d) = %d (%d)\n", | |
2893 | fd, ret, ret != -1 ? 0 : *target_errno); | |
1c4b552b | 2894 | return ret; |
7313baad UW |
2895 | } |
2896 | ||
12e2a5fd GB |
2897 | /* See target.h. */ |
2898 | ||
7313baad UW |
2899 | int |
2900 | target_fileio_close (int fd, int *target_errno) | |
2901 | { | |
1c4b552b GB |
2902 | fileio_fh_t *fh = fileio_fd_to_fh (fd); |
2903 | int ret = -1; | |
7313baad | 2904 | |
5ff79300 | 2905 | if (fh->is_closed ()) |
1c4b552b GB |
2906 | *target_errno = EBADF; |
2907 | else | |
7313baad | 2908 | { |
20db9c52 | 2909 | if (fh->target != NULL) |
f6ac5f3d PA |
2910 | ret = fh->target->fileio_close (fh->target_fd, |
2911 | target_errno); | |
20db9c52 PA |
2912 | else |
2913 | ret = 0; | |
1c4b552b | 2914 | release_fileio_fd (fd, fh); |
7313baad UW |
2915 | } |
2916 | ||
1c4b552b GB |
2917 | if (targetdebug) |
2918 | fprintf_unfiltered (gdb_stdlog, | |
2919 | "target_fileio_close (%d) = %d (%d)\n", | |
2920 | fd, ret, ret != -1 ? 0 : *target_errno); | |
2921 | return ret; | |
7313baad UW |
2922 | } |
2923 | ||
12e2a5fd GB |
2924 | /* See target.h. */ |
2925 | ||
7313baad | 2926 | int |
07c138c8 GB |
2927 | target_fileio_unlink (struct inferior *inf, const char *filename, |
2928 | int *target_errno) | |
7313baad | 2929 | { |
b6a8c27b | 2930 | for (target_ops *t = default_fileio_target (); t != NULL; t = t->beneath ()) |
7313baad | 2931 | { |
f6ac5f3d | 2932 | int ret = t->fileio_unlink (inf, filename, target_errno); |
7313baad | 2933 | |
f6ac5f3d PA |
2934 | if (ret == -1 && *target_errno == FILEIO_ENOSYS) |
2935 | continue; | |
2936 | ||
2937 | if (targetdebug) | |
2938 | fprintf_unfiltered (gdb_stdlog, | |
2939 | "target_fileio_unlink (%d,%s)" | |
2940 | " = %d (%d)\n", | |
2941 | inf == NULL ? 0 : inf->num, filename, | |
2942 | ret, ret != -1 ? 0 : *target_errno); | |
2943 | return ret; | |
7313baad UW |
2944 | } |
2945 | ||
2946 | *target_errno = FILEIO_ENOSYS; | |
2947 | return -1; | |
2948 | } | |
2949 | ||
12e2a5fd GB |
2950 | /* See target.h. */ |
2951 | ||
e0d3522b | 2952 | gdb::optional<std::string> |
07c138c8 GB |
2953 | target_fileio_readlink (struct inferior *inf, const char *filename, |
2954 | int *target_errno) | |
b9e7b9c3 | 2955 | { |
b6a8c27b | 2956 | for (target_ops *t = default_fileio_target (); t != NULL; t = t->beneath ()) |
b9e7b9c3 | 2957 | { |
f6ac5f3d PA |
2958 | gdb::optional<std::string> ret |
2959 | = t->fileio_readlink (inf, filename, target_errno); | |
b9e7b9c3 | 2960 | |
f6ac5f3d PA |
2961 | if (!ret.has_value () && *target_errno == FILEIO_ENOSYS) |
2962 | continue; | |
2963 | ||
2964 | if (targetdebug) | |
2965 | fprintf_unfiltered (gdb_stdlog, | |
2966 | "target_fileio_readlink (%d,%s)" | |
2967 | " = %s (%d)\n", | |
2968 | inf == NULL ? 0 : inf->num, | |
2969 | filename, ret ? ret->c_str () : "(nil)", | |
2970 | ret ? 0 : *target_errno); | |
2971 | return ret; | |
b9e7b9c3 UW |
2972 | } |
2973 | ||
2974 | *target_errno = FILEIO_ENOSYS; | |
e0d3522b | 2975 | return {}; |
b9e7b9c3 UW |
2976 | } |
2977 | ||
770623f7 TT |
2978 | /* Like scoped_fd, but specific to target fileio. */ |
2979 | ||
2980 | class scoped_target_fd | |
7313baad | 2981 | { |
770623f7 TT |
2982 | public: |
2983 | explicit scoped_target_fd (int fd) noexcept | |
2984 | : m_fd (fd) | |
2985 | { | |
2986 | } | |
7313baad | 2987 | |
770623f7 TT |
2988 | ~scoped_target_fd () |
2989 | { | |
2990 | if (m_fd >= 0) | |
2991 | { | |
2992 | int target_errno; | |
2993 | ||
2994 | target_fileio_close (m_fd, &target_errno); | |
2995 | } | |
2996 | } | |
2997 | ||
2998 | DISABLE_COPY_AND_ASSIGN (scoped_target_fd); | |
2999 | ||
3000 | int get () const noexcept | |
3001 | { | |
3002 | return m_fd; | |
3003 | } | |
3004 | ||
3005 | private: | |
3006 | int m_fd; | |
3007 | }; | |
7313baad | 3008 | |
07c138c8 GB |
3009 | /* Read target file FILENAME, in the filesystem as seen by INF. If |
3010 | INF is NULL, use the filesystem seen by the debugger (GDB or, for | |
3011 | remote targets, the remote stub). Store the result in *BUF_P and | |
3012 | return the size of the transferred data. PADDING additional bytes | |
3013 | are available in *BUF_P. This is a helper function for | |
3014 | target_fileio_read_alloc; see the declaration of that function for | |
3015 | more information. */ | |
7313baad | 3016 | |
f7af1fcd JK |
3017 | static LONGEST |
3018 | target_fileio_read_alloc_1 (struct inferior *inf, const char *filename, | |
3019 | gdb_byte **buf_p, int padding) | |
3020 | { | |
db1ff28b JK |
3021 | size_t buf_alloc, buf_pos; |
3022 | gdb_byte *buf; | |
3023 | LONGEST n; | |
db1ff28b | 3024 | int target_errno; |
f7af1fcd | 3025 | |
770623f7 TT |
3026 | scoped_target_fd fd (target_fileio_open (inf, filename, FILEIO_O_RDONLY, |
3027 | 0700, &target_errno)); | |
3028 | if (fd.get () == -1) | |
f7af1fcd JK |
3029 | return -1; |
3030 | ||
db1ff28b JK |
3031 | /* Start by reading up to 4K at a time. The target will throttle |
3032 | this number down if necessary. */ | |
3033 | buf_alloc = 4096; | |
224c3ddb | 3034 | buf = (gdb_byte *) xmalloc (buf_alloc); |
db1ff28b JK |
3035 | buf_pos = 0; |
3036 | while (1) | |
3037 | { | |
770623f7 | 3038 | n = target_fileio_pread (fd.get (), &buf[buf_pos], |
db1ff28b JK |
3039 | buf_alloc - buf_pos - padding, buf_pos, |
3040 | &target_errno); | |
3041 | if (n < 0) | |
3042 | { | |
3043 | /* An error occurred. */ | |
db1ff28b JK |
3044 | xfree (buf); |
3045 | return -1; | |
3046 | } | |
3047 | else if (n == 0) | |
3048 | { | |
3049 | /* Read all there was. */ | |
db1ff28b JK |
3050 | if (buf_pos == 0) |
3051 | xfree (buf); | |
3052 | else | |
3053 | *buf_p = buf; | |
3054 | return buf_pos; | |
3055 | } | |
3056 | ||
3057 | buf_pos += n; | |
3058 | ||
3059 | /* If the buffer is filling up, expand it. */ | |
3060 | if (buf_alloc < buf_pos * 2) | |
3061 | { | |
3062 | buf_alloc *= 2; | |
224c3ddb | 3063 | buf = (gdb_byte *) xrealloc (buf, buf_alloc); |
db1ff28b JK |
3064 | } |
3065 | ||
3066 | QUIT; | |
3067 | } | |
f7af1fcd JK |
3068 | } |
3069 | ||
12e2a5fd | 3070 | /* See target.h. */ |
7313baad UW |
3071 | |
3072 | LONGEST | |
07c138c8 GB |
3073 | target_fileio_read_alloc (struct inferior *inf, const char *filename, |
3074 | gdb_byte **buf_p) | |
7313baad | 3075 | { |
07c138c8 | 3076 | return target_fileio_read_alloc_1 (inf, filename, buf_p, 0); |
7313baad UW |
3077 | } |
3078 | ||
db1ff28b | 3079 | /* See target.h. */ |
f7af1fcd | 3080 | |
87028b87 | 3081 | gdb::unique_xmalloc_ptr<char> |
f7af1fcd JK |
3082 | target_fileio_read_stralloc (struct inferior *inf, const char *filename) |
3083 | { | |
db1ff28b JK |
3084 | gdb_byte *buffer; |
3085 | char *bufstr; | |
3086 | LONGEST i, transferred; | |
3087 | ||
3088 | transferred = target_fileio_read_alloc_1 (inf, filename, &buffer, 1); | |
3089 | bufstr = (char *) buffer; | |
3090 | ||
3091 | if (transferred < 0) | |
87028b87 | 3092 | return gdb::unique_xmalloc_ptr<char> (nullptr); |
db1ff28b JK |
3093 | |
3094 | if (transferred == 0) | |
87028b87 | 3095 | return gdb::unique_xmalloc_ptr<char> (xstrdup ("")); |
db1ff28b JK |
3096 | |
3097 | bufstr[transferred] = 0; | |
3098 | ||
3099 | /* Check for embedded NUL bytes; but allow trailing NULs. */ | |
3100 | for (i = strlen (bufstr); i < transferred; i++) | |
3101 | if (bufstr[i] != 0) | |
3102 | { | |
3103 | warning (_("target file %s " | |
3104 | "contained unexpected null characters"), | |
3105 | filename); | |
3106 | break; | |
3107 | } | |
3108 | ||
87028b87 | 3109 | return gdb::unique_xmalloc_ptr<char> (bufstr); |
f7af1fcd | 3110 | } |
7313baad | 3111 | |
db1ff28b | 3112 | |
e0d24f8d | 3113 | static int |
31568a15 TT |
3114 | default_region_ok_for_hw_watchpoint (struct target_ops *self, |
3115 | CORE_ADDR addr, int len) | |
e0d24f8d | 3116 | { |
f5656ead | 3117 | return (len <= gdbarch_ptr_bit (target_gdbarch ()) / TARGET_CHAR_BIT); |
ccaa32c7 GS |
3118 | } |
3119 | ||
5009afc5 AS |
3120 | static int |
3121 | default_watchpoint_addr_within_range (struct target_ops *target, | |
3122 | CORE_ADDR addr, | |
3123 | CORE_ADDR start, int length) | |
3124 | { | |
3125 | return addr >= start && addr < start + length; | |
3126 | } | |
3127 | ||
8b06beed TT |
3128 | /* See target.h. */ |
3129 | ||
a1740ee1 PA |
3130 | target_ops * |
3131 | target_stack::find_beneath (const target_ops *t) const | |
8b06beed | 3132 | { |
a1740ee1 | 3133 | /* Look for a non-empty slot at stratum levels beneath T's. */ |
66b4deae | 3134 | for (int stratum = t->stratum () - 1; stratum >= 0; --stratum) |
a1740ee1 PA |
3135 | if (m_stack[stratum] != NULL) |
3136 | return m_stack[stratum]; | |
8b06beed TT |
3137 | |
3138 | return NULL; | |
3139 | } | |
3140 | ||
a1740ee1 PA |
3141 | /* See target.h. */ |
3142 | ||
3143 | struct target_ops * | |
3144 | find_target_at (enum strata stratum) | |
3145 | { | |
3146 | return g_target_stack.at (stratum); | |
3147 | } | |
3148 | ||
c906108c | 3149 | \f |
0f48b757 PA |
3150 | |
3151 | /* See target.h */ | |
3152 | ||
3153 | void | |
3154 | target_announce_detach (int from_tty) | |
3155 | { | |
3156 | pid_t pid; | |
a121b7c1 | 3157 | const char *exec_file; |
0f48b757 PA |
3158 | |
3159 | if (!from_tty) | |
3160 | return; | |
3161 | ||
3162 | exec_file = get_exec_file (0); | |
3163 | if (exec_file == NULL) | |
3164 | exec_file = ""; | |
3165 | ||
e99b03dc | 3166 | pid = inferior_ptid.pid (); |
0f48b757 | 3167 | printf_unfiltered (_("Detaching from program: %s, %s\n"), exec_file, |
f2907e49 | 3168 | target_pid_to_str (ptid_t (pid))); |
0f48b757 PA |
3169 | } |
3170 | ||
c906108c SS |
3171 | /* The inferior process has died. Long live the inferior! */ |
3172 | ||
3173 | void | |
fba45db2 | 3174 | generic_mourn_inferior (void) |
c906108c | 3175 | { |
00431a78 | 3176 | inferior *inf = current_inferior (); |
c906108c | 3177 | |
39f77062 | 3178 | inferior_ptid = null_ptid; |
7f9f62ba | 3179 | |
f59f708a PA |
3180 | /* Mark breakpoints uninserted in case something tries to delete a |
3181 | breakpoint while we delete the inferior's threads (which would | |
3182 | fail, since the inferior is long gone). */ | |
3183 | mark_breakpoints_out (); | |
3184 | ||
00431a78 PA |
3185 | if (inf->pid != 0) |
3186 | exit_inferior (inf); | |
7f9f62ba | 3187 | |
f59f708a PA |
3188 | /* Note this wipes step-resume breakpoints, so needs to be done |
3189 | after exit_inferior, which ends up referencing the step-resume | |
3190 | breakpoints through clear_thread_inferior_resources. */ | |
c906108c | 3191 | breakpoint_init_inferior (inf_exited); |
f59f708a | 3192 | |
c906108c SS |
3193 | registers_changed (); |
3194 | ||
c906108c SS |
3195 | reopen_exec_file (); |
3196 | reinit_frame_cache (); | |
3197 | ||
9a4105ab AC |
3198 | if (deprecated_detach_hook) |
3199 | deprecated_detach_hook (); | |
c906108c SS |
3200 | } |
3201 | \f | |
fd0a2a6f MK |
3202 | /* Convert a normal process ID to a string. Returns the string in a |
3203 | static buffer. */ | |
c906108c | 3204 | |
7a114964 | 3205 | const char * |
39f77062 | 3206 | normal_pid_to_str (ptid_t ptid) |
c906108c | 3207 | { |
fd0a2a6f | 3208 | static char buf[32]; |
c906108c | 3209 | |
e99b03dc | 3210 | xsnprintf (buf, sizeof buf, "process %d", ptid.pid ()); |
c906108c SS |
3211 | return buf; |
3212 | } | |
3213 | ||
7a114964 | 3214 | static const char * |
770234d3 | 3215 | default_pid_to_str (struct target_ops *ops, ptid_t ptid) |
117de6a9 PA |
3216 | { |
3217 | return normal_pid_to_str (ptid); | |
3218 | } | |
3219 | ||
9b4eba8e HZ |
3220 | /* Error-catcher for target_find_memory_regions. */ |
3221 | static int | |
2e73927c TT |
3222 | dummy_find_memory_regions (struct target_ops *self, |
3223 | find_memory_region_ftype ignore1, void *ignore2) | |
be4d1333 | 3224 | { |
9b4eba8e | 3225 | error (_("Command not implemented for this target.")); |
be4d1333 MS |
3226 | return 0; |
3227 | } | |
3228 | ||
9b4eba8e HZ |
3229 | /* Error-catcher for target_make_corefile_notes. */ |
3230 | static char * | |
fc6691b2 TT |
3231 | dummy_make_corefile_notes (struct target_ops *self, |
3232 | bfd *ignore1, int *ignore2) | |
be4d1333 | 3233 | { |
9b4eba8e | 3234 | error (_("Command not implemented for this target.")); |
be4d1333 MS |
3235 | return NULL; |
3236 | } | |
3237 | ||
f6ac5f3d PA |
3238 | #include "target-delegates.c" |
3239 | ||
06b5b831 TT |
3240 | /* The initial current target, so that there is always a semi-valid |
3241 | current target. */ | |
3242 | ||
3243 | static dummy_target the_dummy_target; | |
c906108c | 3244 | |
d9f719f1 PA |
3245 | static const target_info dummy_target_info = { |
3246 | "None", | |
3247 | N_("None"), | |
3248 | "" | |
3249 | }; | |
3250 | ||
66b4deae PA |
3251 | strata |
3252 | dummy_target::stratum () const | |
f6ac5f3d | 3253 | { |
66b4deae | 3254 | return dummy_stratum; |
f6ac5f3d PA |
3255 | } |
3256 | ||
66b4deae PA |
3257 | strata |
3258 | debug_target::stratum () const | |
f6ac5f3d | 3259 | { |
66b4deae | 3260 | return debug_stratum; |
f6ac5f3d PA |
3261 | } |
3262 | ||
d9f719f1 PA |
3263 | const target_info & |
3264 | dummy_target::info () const | |
f6ac5f3d | 3265 | { |
d9f719f1 | 3266 | return dummy_target_info; |
f6ac5f3d PA |
3267 | } |
3268 | ||
d9f719f1 PA |
3269 | const target_info & |
3270 | debug_target::info () const | |
f6ac5f3d | 3271 | { |
b6a8c27b | 3272 | return beneath ()->info (); |
f6ac5f3d PA |
3273 | } |
3274 | ||
c906108c | 3275 | \f |
c906108c | 3276 | |
f1c07ab0 | 3277 | void |
460014f5 | 3278 | target_close (struct target_ops *targ) |
f1c07ab0 | 3279 | { |
7fdc1521 TT |
3280 | gdb_assert (!target_is_pushed (targ)); |
3281 | ||
20db9c52 PA |
3282 | fileio_handles_invalidate_target (targ); |
3283 | ||
f6ac5f3d | 3284 | targ->close (); |
947b8855 PA |
3285 | |
3286 | if (targetdebug) | |
460014f5 | 3287 | fprintf_unfiltered (gdb_stdlog, "target_close ()\n"); |
f1c07ab0 AC |
3288 | } |
3289 | ||
28439f5e PA |
3290 | int |
3291 | target_thread_alive (ptid_t ptid) | |
c906108c | 3292 | { |
8b88a78e | 3293 | return current_top_target ()->thread_alive (ptid); |
28439f5e PA |
3294 | } |
3295 | ||
3296 | void | |
e8032dde | 3297 | target_update_thread_list (void) |
28439f5e | 3298 | { |
8b88a78e | 3299 | current_top_target ()->update_thread_list (); |
c906108c SS |
3300 | } |
3301 | ||
d914c394 SS |
3302 | void |
3303 | target_stop (ptid_t ptid) | |
3304 | { | |
3305 | if (!may_stop) | |
3306 | { | |
3307 | warning (_("May not interrupt or stop the target, ignoring attempt")); | |
3308 | return; | |
3309 | } | |
3310 | ||
8b88a78e | 3311 | current_top_target ()->stop (ptid); |
d914c394 SS |
3312 | } |
3313 | ||
bfedc46a | 3314 | void |
e671cd59 | 3315 | target_interrupt () |
bfedc46a PA |
3316 | { |
3317 | if (!may_stop) | |
3318 | { | |
3319 | warning (_("May not interrupt or stop the target, ignoring attempt")); | |
3320 | return; | |
3321 | } | |
3322 | ||
8b88a78e | 3323 | current_top_target ()->interrupt (); |
bfedc46a PA |
3324 | } |
3325 | ||
abc56d60 PA |
3326 | /* See target.h. */ |
3327 | ||
93692b58 PA |
3328 | void |
3329 | target_pass_ctrlc (void) | |
3330 | { | |
8b88a78e | 3331 | current_top_target ()->pass_ctrlc (); |
93692b58 PA |
3332 | } |
3333 | ||
3334 | /* See target.h. */ | |
3335 | ||
3336 | void | |
3337 | default_target_pass_ctrlc (struct target_ops *ops) | |
3338 | { | |
e671cd59 | 3339 | target_interrupt (); |
93692b58 PA |
3340 | } |
3341 | ||
f8c1d06b GB |
3342 | /* See target/target.h. */ |
3343 | ||
3344 | void | |
03f4463b | 3345 | target_stop_and_wait (ptid_t ptid) |
f8c1d06b GB |
3346 | { |
3347 | struct target_waitstatus status; | |
3348 | int was_non_stop = non_stop; | |
3349 | ||
3350 | non_stop = 1; | |
3351 | target_stop (ptid); | |
3352 | ||
3353 | memset (&status, 0, sizeof (status)); | |
3354 | target_wait (ptid, &status, 0); | |
3355 | ||
3356 | non_stop = was_non_stop; | |
3357 | } | |
3358 | ||
3359 | /* See target/target.h. */ | |
3360 | ||
3361 | void | |
03f4463b | 3362 | target_continue_no_signal (ptid_t ptid) |
f8c1d06b GB |
3363 | { |
3364 | target_resume (ptid, 0, GDB_SIGNAL_0); | |
3365 | } | |
3366 | ||
049a8570 SDJ |
3367 | /* See target/target.h. */ |
3368 | ||
3369 | void | |
3370 | target_continue (ptid_t ptid, enum gdb_signal signal) | |
3371 | { | |
3372 | target_resume (ptid, 0, signal); | |
3373 | } | |
3374 | ||
fdbac7d8 | 3375 | /* Concatenate ELEM to LIST, a comma-separated list. */ |
09826ec5 | 3376 | |
09ce46f2 SM |
3377 | static void |
3378 | str_comma_list_concat_elem (std::string *list, const char *elem) | |
09826ec5 | 3379 | { |
09ce46f2 SM |
3380 | if (!list->empty ()) |
3381 | list->append (", "); | |
3382 | ||
3383 | list->append (elem); | |
09826ec5 PA |
3384 | } |
3385 | ||
3386 | /* Helper for target_options_to_string. If OPT is present in | |
3387 | TARGET_OPTIONS, append the OPT_STR (string version of OPT) in RET. | |
09ce46f2 | 3388 | OPT is removed from TARGET_OPTIONS. */ |
09826ec5 | 3389 | |
09ce46f2 SM |
3390 | static void |
3391 | do_option (int *target_options, std::string *ret, | |
a121b7c1 | 3392 | int opt, const char *opt_str) |
09826ec5 PA |
3393 | { |
3394 | if ((*target_options & opt) != 0) | |
3395 | { | |
09ce46f2 | 3396 | str_comma_list_concat_elem (ret, opt_str); |
09826ec5 PA |
3397 | *target_options &= ~opt; |
3398 | } | |
09826ec5 PA |
3399 | } |
3400 | ||
fdbac7d8 SM |
3401 | /* See target.h. */ |
3402 | ||
09ce46f2 | 3403 | std::string |
09826ec5 PA |
3404 | target_options_to_string (int target_options) |
3405 | { | |
09ce46f2 | 3406 | std::string ret; |
09826ec5 PA |
3407 | |
3408 | #define DO_TARG_OPTION(OPT) \ | |
09ce46f2 | 3409 | do_option (&target_options, &ret, OPT, #OPT) |
09826ec5 PA |
3410 | |
3411 | DO_TARG_OPTION (TARGET_WNOHANG); | |
3412 | ||
3413 | if (target_options != 0) | |
09ce46f2 | 3414 | str_comma_list_concat_elem (&ret, "unknown???"); |
09826ec5 | 3415 | |
09826ec5 PA |
3416 | return ret; |
3417 | } | |
3418 | ||
28439f5e PA |
3419 | void |
3420 | target_fetch_registers (struct regcache *regcache, int regno) | |
c906108c | 3421 | { |
8b88a78e | 3422 | current_top_target ()->fetch_registers (regcache, regno); |
ad5989bd | 3423 | if (targetdebug) |
ef79d9a3 | 3424 | regcache->debug_print_register ("target_fetch_registers", regno); |
c906108c SS |
3425 | } |
3426 | ||
28439f5e PA |
3427 | void |
3428 | target_store_registers (struct regcache *regcache, int regno) | |
c906108c | 3429 | { |
d914c394 SS |
3430 | if (!may_write_registers) |
3431 | error (_("Writing to registers is not allowed (regno %d)"), regno); | |
3432 | ||
8b88a78e | 3433 | current_top_target ()->store_registers (regcache, regno); |
6b84065d | 3434 | if (targetdebug) |
28439f5e | 3435 | { |
ef79d9a3 | 3436 | regcache->debug_print_register ("target_store_registers", regno); |
28439f5e | 3437 | } |
c906108c SS |
3438 | } |
3439 | ||
dc146f7c VP |
3440 | int |
3441 | target_core_of_thread (ptid_t ptid) | |
3442 | { | |
8b88a78e | 3443 | return current_top_target ()->core_of_thread (ptid); |
dc146f7c VP |
3444 | } |
3445 | ||
936d2992 PA |
3446 | int |
3447 | simple_verify_memory (struct target_ops *ops, | |
3448 | const gdb_byte *data, CORE_ADDR lma, ULONGEST size) | |
3449 | { | |
3450 | LONGEST total_xfered = 0; | |
3451 | ||
3452 | while (total_xfered < size) | |
3453 | { | |
3454 | ULONGEST xfered_len; | |
3455 | enum target_xfer_status status; | |
3456 | gdb_byte buf[1024]; | |
768adc05 | 3457 | ULONGEST howmuch = std::min<ULONGEST> (sizeof (buf), size - total_xfered); |
936d2992 PA |
3458 | |
3459 | status = target_xfer_partial (ops, TARGET_OBJECT_MEMORY, NULL, | |
3460 | buf, NULL, lma + total_xfered, howmuch, | |
3461 | &xfered_len); | |
3462 | if (status == TARGET_XFER_OK | |
3463 | && memcmp (data + total_xfered, buf, xfered_len) == 0) | |
3464 | { | |
3465 | total_xfered += xfered_len; | |
3466 | QUIT; | |
3467 | } | |
3468 | else | |
3469 | return 0; | |
3470 | } | |
3471 | return 1; | |
3472 | } | |
3473 | ||
3474 | /* Default implementation of memory verification. */ | |
3475 | ||
3476 | static int | |
3477 | default_verify_memory (struct target_ops *self, | |
3478 | const gdb_byte *data, CORE_ADDR memaddr, ULONGEST size) | |
3479 | { | |
3480 | /* Start over from the top of the target stack. */ | |
8b88a78e | 3481 | return simple_verify_memory (current_top_target (), |
936d2992 PA |
3482 | data, memaddr, size); |
3483 | } | |
3484 | ||
4a5e7a5b PA |
3485 | int |
3486 | target_verify_memory (const gdb_byte *data, CORE_ADDR memaddr, ULONGEST size) | |
3487 | { | |
8b88a78e | 3488 | return current_top_target ()->verify_memory (data, memaddr, size); |
4a5e7a5b PA |
3489 | } |
3490 | ||
9c06b0b4 TJB |
3491 | /* The documentation for this function is in its prototype declaration in |
3492 | target.h. */ | |
3493 | ||
3494 | int | |
f4b0a671 SM |
3495 | target_insert_mask_watchpoint (CORE_ADDR addr, CORE_ADDR mask, |
3496 | enum target_hw_bp_type rw) | |
9c06b0b4 | 3497 | { |
8b88a78e | 3498 | return current_top_target ()->insert_mask_watchpoint (addr, mask, rw); |
9c06b0b4 TJB |
3499 | } |
3500 | ||
3501 | /* The documentation for this function is in its prototype declaration in | |
3502 | target.h. */ | |
3503 | ||
3504 | int | |
f4b0a671 SM |
3505 | target_remove_mask_watchpoint (CORE_ADDR addr, CORE_ADDR mask, |
3506 | enum target_hw_bp_type rw) | |
9c06b0b4 | 3507 | { |
8b88a78e | 3508 | return current_top_target ()->remove_mask_watchpoint (addr, mask, rw); |
9c06b0b4 TJB |
3509 | } |
3510 | ||
3511 | /* The documentation for this function is in its prototype declaration | |
3512 | in target.h. */ | |
3513 | ||
3514 | int | |
3515 | target_masked_watch_num_registers (CORE_ADDR addr, CORE_ADDR mask) | |
3516 | { | |
8b88a78e | 3517 | return current_top_target ()->masked_watch_num_registers (addr, mask); |
9c06b0b4 TJB |
3518 | } |
3519 | ||
f1310107 TJB |
3520 | /* The documentation for this function is in its prototype declaration |
3521 | in target.h. */ | |
3522 | ||
3523 | int | |
3524 | target_ranged_break_num_registers (void) | |
3525 | { | |
8b88a78e | 3526 | return current_top_target ()->ranged_break_num_registers (); |
f1310107 TJB |
3527 | } |
3528 | ||
02d27625 MM |
3529 | /* See target.h. */ |
3530 | ||
02d27625 | 3531 | struct btrace_target_info * |
f4abbc16 | 3532 | target_enable_btrace (ptid_t ptid, const struct btrace_config *conf) |
02d27625 | 3533 | { |
8b88a78e | 3534 | return current_top_target ()->enable_btrace (ptid, conf); |
02d27625 MM |
3535 | } |
3536 | ||
3537 | /* See target.h. */ | |
3538 | ||
3539 | void | |
3540 | target_disable_btrace (struct btrace_target_info *btinfo) | |
3541 | { | |
8b88a78e | 3542 | current_top_target ()->disable_btrace (btinfo); |
02d27625 MM |
3543 | } |
3544 | ||
3545 | /* See target.h. */ | |
3546 | ||
3547 | void | |
3548 | target_teardown_btrace (struct btrace_target_info *btinfo) | |
3549 | { | |
8b88a78e | 3550 | current_top_target ()->teardown_btrace (btinfo); |
02d27625 MM |
3551 | } |
3552 | ||
3553 | /* See target.h. */ | |
3554 | ||
969c39fb | 3555 | enum btrace_error |
734b0e4b | 3556 | target_read_btrace (struct btrace_data *btrace, |
969c39fb | 3557 | struct btrace_target_info *btinfo, |
02d27625 MM |
3558 | enum btrace_read_type type) |
3559 | { | |
8b88a78e | 3560 | return current_top_target ()->read_btrace (btrace, btinfo, type); |
02d27625 MM |
3561 | } |
3562 | ||
d02ed0bb MM |
3563 | /* See target.h. */ |
3564 | ||
f4abbc16 MM |
3565 | const struct btrace_config * |
3566 | target_btrace_conf (const struct btrace_target_info *btinfo) | |
3567 | { | |
8b88a78e | 3568 | return current_top_target ()->btrace_conf (btinfo); |
f4abbc16 MM |
3569 | } |
3570 | ||
3571 | /* See target.h. */ | |
3572 | ||
7c1687a9 MM |
3573 | void |
3574 | target_stop_recording (void) | |
3575 | { | |
8b88a78e | 3576 | current_top_target ()->stop_recording (); |
7c1687a9 MM |
3577 | } |
3578 | ||
3579 | /* See target.h. */ | |
3580 | ||
d02ed0bb | 3581 | void |
85e1311a | 3582 | target_save_record (const char *filename) |
d02ed0bb | 3583 | { |
8b88a78e | 3584 | current_top_target ()->save_record (filename); |
d02ed0bb MM |
3585 | } |
3586 | ||
3587 | /* See target.h. */ | |
3588 | ||
3589 | int | |
f6ac5f3d | 3590 | target_supports_delete_record () |
d02ed0bb | 3591 | { |
8b88a78e | 3592 | return current_top_target ()->supports_delete_record (); |
d02ed0bb MM |
3593 | } |
3594 | ||
3595 | /* See target.h. */ | |
3596 | ||
3597 | void | |
3598 | target_delete_record (void) | |
3599 | { | |
8b88a78e | 3600 | current_top_target ()->delete_record (); |
d02ed0bb MM |
3601 | } |
3602 | ||
3603 | /* See target.h. */ | |
3604 | ||
b158a20f TW |
3605 | enum record_method |
3606 | target_record_method (ptid_t ptid) | |
3607 | { | |
8b88a78e | 3608 | return current_top_target ()->record_method (ptid); |
b158a20f TW |
3609 | } |
3610 | ||
3611 | /* See target.h. */ | |
3612 | ||
d02ed0bb | 3613 | int |
a52eab48 | 3614 | target_record_is_replaying (ptid_t ptid) |
d02ed0bb | 3615 | { |
8b88a78e | 3616 | return current_top_target ()->record_is_replaying (ptid); |
d02ed0bb MM |
3617 | } |
3618 | ||
3619 | /* See target.h. */ | |
3620 | ||
7ff27e9b MM |
3621 | int |
3622 | target_record_will_replay (ptid_t ptid, int dir) | |
3623 | { | |
8b88a78e | 3624 | return current_top_target ()->record_will_replay (ptid, dir); |
7ff27e9b MM |
3625 | } |
3626 | ||
3627 | /* See target.h. */ | |
3628 | ||
797094dd MM |
3629 | void |
3630 | target_record_stop_replaying (void) | |
3631 | { | |
8b88a78e | 3632 | current_top_target ()->record_stop_replaying (); |
797094dd MM |
3633 | } |
3634 | ||
3635 | /* See target.h. */ | |
3636 | ||
d02ed0bb MM |
3637 | void |
3638 | target_goto_record_begin (void) | |
3639 | { | |
8b88a78e | 3640 | current_top_target ()->goto_record_begin (); |
d02ed0bb MM |
3641 | } |
3642 | ||
3643 | /* See target.h. */ | |
3644 | ||
3645 | void | |
3646 | target_goto_record_end (void) | |
3647 | { | |
8b88a78e | 3648 | current_top_target ()->goto_record_end (); |
d02ed0bb MM |
3649 | } |
3650 | ||
3651 | /* See target.h. */ | |
3652 | ||
3653 | void | |
3654 | target_goto_record (ULONGEST insn) | |
3655 | { | |
8b88a78e | 3656 | current_top_target ()->goto_record (insn); |
d02ed0bb MM |
3657 | } |
3658 | ||
67c86d06 MM |
3659 | /* See target.h. */ |
3660 | ||
3661 | void | |
9a24775b | 3662 | target_insn_history (int size, gdb_disassembly_flags flags) |
67c86d06 | 3663 | { |
8b88a78e | 3664 | current_top_target ()->insn_history (size, flags); |
67c86d06 MM |
3665 | } |
3666 | ||
3667 | /* See target.h. */ | |
3668 | ||
3669 | void | |
9a24775b PA |
3670 | target_insn_history_from (ULONGEST from, int size, |
3671 | gdb_disassembly_flags flags) | |
67c86d06 | 3672 | { |
8b88a78e | 3673 | current_top_target ()->insn_history_from (from, size, flags); |
67c86d06 MM |
3674 | } |
3675 | ||
3676 | /* See target.h. */ | |
3677 | ||
3678 | void | |
9a24775b PA |
3679 | target_insn_history_range (ULONGEST begin, ULONGEST end, |
3680 | gdb_disassembly_flags flags) | |
67c86d06 | 3681 | { |
8b88a78e | 3682 | current_top_target ()->insn_history_range (begin, end, flags); |
67c86d06 MM |
3683 | } |
3684 | ||
15984c13 MM |
3685 | /* See target.h. */ |
3686 | ||
3687 | void | |
0cb7c7b0 | 3688 | target_call_history (int size, record_print_flags flags) |
15984c13 | 3689 | { |
8b88a78e | 3690 | current_top_target ()->call_history (size, flags); |
15984c13 MM |
3691 | } |
3692 | ||
3693 | /* See target.h. */ | |
3694 | ||
3695 | void | |
0cb7c7b0 | 3696 | target_call_history_from (ULONGEST begin, int size, record_print_flags flags) |
15984c13 | 3697 | { |
8b88a78e | 3698 | current_top_target ()->call_history_from (begin, size, flags); |
15984c13 MM |
3699 | } |
3700 | ||
3701 | /* See target.h. */ | |
3702 | ||
3703 | void | |
0cb7c7b0 | 3704 | target_call_history_range (ULONGEST begin, ULONGEST end, record_print_flags flags) |
15984c13 | 3705 | { |
8b88a78e | 3706 | current_top_target ()->call_history_range (begin, end, flags); |
15984c13 MM |
3707 | } |
3708 | ||
ea001bdc MM |
3709 | /* See target.h. */ |
3710 | ||
3711 | const struct frame_unwind * | |
3712 | target_get_unwinder (void) | |
3713 | { | |
8b88a78e | 3714 | return current_top_target ()->get_unwinder (); |
ea001bdc MM |
3715 | } |
3716 | ||
3717 | /* See target.h. */ | |
3718 | ||
3719 | const struct frame_unwind * | |
3720 | target_get_tailcall_unwinder (void) | |
3721 | { | |
8b88a78e | 3722 | return current_top_target ()->get_tailcall_unwinder (); |
ea001bdc MM |
3723 | } |
3724 | ||
5fff78c4 MM |
3725 | /* See target.h. */ |
3726 | ||
3727 | void | |
3728 | target_prepare_to_generate_core (void) | |
3729 | { | |
8b88a78e | 3730 | current_top_target ()->prepare_to_generate_core (); |
5fff78c4 MM |
3731 | } |
3732 | ||
3733 | /* See target.h. */ | |
3734 | ||
3735 | void | |
3736 | target_done_generating_core (void) | |
3737 | { | |
8b88a78e | 3738 | current_top_target ()->done_generating_core (); |
5fff78c4 MM |
3739 | } |
3740 | ||
c906108c | 3741 | \f |
c5aa993b JM |
3742 | |
3743 | static char targ_desc[] = | |
3e43a32a MS |
3744 | "Names of targets and files being debugged.\nShows the entire \ |
3745 | stack of targets currently in use (including the exec-file,\n\ | |
c906108c SS |
3746 | core-file, and process, if any), as well as the symbol file name."; |
3747 | ||
a53f3625 | 3748 | static void |
a30bf1f1 TT |
3749 | default_rcmd (struct target_ops *self, const char *command, |
3750 | struct ui_file *output) | |
a53f3625 TT |
3751 | { |
3752 | error (_("\"monitor\" command not supported by this target.")); | |
3753 | } | |
3754 | ||
96baa820 | 3755 | static void |
0b39b52e | 3756 | do_monitor_command (const char *cmd, int from_tty) |
96baa820 | 3757 | { |
96baa820 JM |
3758 | target_rcmd (cmd, gdb_stdtarg); |
3759 | } | |
3760 | ||
78cbbba8 LM |
3761 | /* Erases all the memory regions marked as flash. CMD and FROM_TTY are |
3762 | ignored. */ | |
3763 | ||
3764 | void | |
0b39b52e | 3765 | flash_erase_command (const char *cmd, int from_tty) |
78cbbba8 LM |
3766 | { |
3767 | /* Used to communicate termination of flash operations to the target. */ | |
3768 | bool found_flash_region = false; | |
78cbbba8 LM |
3769 | struct gdbarch *gdbarch = target_gdbarch (); |
3770 | ||
a664f67e | 3771 | std::vector<mem_region> mem_regions = target_memory_map (); |
78cbbba8 LM |
3772 | |
3773 | /* Iterate over all memory regions. */ | |
a664f67e | 3774 | for (const mem_region &m : mem_regions) |
78cbbba8 | 3775 | { |
78cbbba8 | 3776 | /* Is this a flash memory region? */ |
a664f67e | 3777 | if (m.attrib.mode == MEM_FLASH) |
78cbbba8 LM |
3778 | { |
3779 | found_flash_region = true; | |
a664f67e | 3780 | target_flash_erase (m.lo, m.hi - m.lo); |
78cbbba8 | 3781 | |
76f9c9cf | 3782 | ui_out_emit_tuple tuple_emitter (current_uiout, "erased-regions"); |
78cbbba8 LM |
3783 | |
3784 | current_uiout->message (_("Erasing flash memory region at address ")); | |
a664f67e | 3785 | current_uiout->field_fmt ("address", "%s", paddress (gdbarch, m.lo)); |
78cbbba8 | 3786 | current_uiout->message (", size = "); |
a664f67e | 3787 | current_uiout->field_fmt ("size", "%s", hex_string (m.hi - m.lo)); |
78cbbba8 | 3788 | current_uiout->message ("\n"); |
78cbbba8 LM |
3789 | } |
3790 | } | |
3791 | ||
3792 | /* Did we do any flash operations? If so, we need to finalize them. */ | |
3793 | if (found_flash_region) | |
3794 | target_flash_done (); | |
3795 | else | |
3796 | current_uiout->message (_("No flash memory regions found.\n")); | |
3797 | } | |
3798 | ||
87680a14 JB |
3799 | /* Print the name of each layers of our target stack. */ |
3800 | ||
3801 | static void | |
d3cb6b99 | 3802 | maintenance_print_target_stack (const char *cmd, int from_tty) |
87680a14 | 3803 | { |
87680a14 JB |
3804 | printf_filtered (_("The current target stack is:\n")); |
3805 | ||
b6a8c27b | 3806 | for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
87680a14 | 3807 | { |
66b4deae | 3808 | if (t->stratum () == debug_stratum) |
f6ac5f3d PA |
3809 | continue; |
3810 | printf_filtered (" - %s (%s)\n", t->shortname (), t->longname ()); | |
87680a14 JB |
3811 | } |
3812 | } | |
3813 | ||
372316f1 PA |
3814 | /* See target.h. */ |
3815 | ||
3816 | void | |
3817 | target_async (int enable) | |
3818 | { | |
3819 | infrun_async (enable); | |
8b88a78e | 3820 | current_top_target ()->async (enable); |
372316f1 PA |
3821 | } |
3822 | ||
65706a29 PA |
3823 | /* See target.h. */ |
3824 | ||
3825 | void | |
3826 | target_thread_events (int enable) | |
3827 | { | |
8b88a78e | 3828 | current_top_target ()->thread_events (enable); |
65706a29 PA |
3829 | } |
3830 | ||
329ea579 PA |
3831 | /* Controls if targets can report that they can/are async. This is |
3832 | just for maintainers to use when debugging gdb. */ | |
3833 | int target_async_permitted = 1; | |
c6ebd6cf VP |
3834 | |
3835 | /* The set command writes to this variable. If the inferior is | |
b5419e49 | 3836 | executing, target_async_permitted is *not* updated. */ |
329ea579 | 3837 | static int target_async_permitted_1 = 1; |
c6ebd6cf VP |
3838 | |
3839 | static void | |
eb4c3f4a | 3840 | maint_set_target_async_command (const char *args, int from_tty, |
329ea579 | 3841 | struct cmd_list_element *c) |
c6ebd6cf | 3842 | { |
c35b1492 | 3843 | if (have_live_inferiors ()) |
c6ebd6cf VP |
3844 | { |
3845 | target_async_permitted_1 = target_async_permitted; | |
3846 | error (_("Cannot change this setting while the inferior is running.")); | |
3847 | } | |
3848 | ||
3849 | target_async_permitted = target_async_permitted_1; | |
3850 | } | |
3851 | ||
3852 | static void | |
329ea579 PA |
3853 | maint_show_target_async_command (struct ui_file *file, int from_tty, |
3854 | struct cmd_list_element *c, | |
3855 | const char *value) | |
c6ebd6cf | 3856 | { |
3e43a32a MS |
3857 | fprintf_filtered (file, |
3858 | _("Controlling the inferior in " | |
3859 | "asynchronous mode is %s.\n"), value); | |
c6ebd6cf VP |
3860 | } |
3861 | ||
fbea99ea PA |
3862 | /* Return true if the target operates in non-stop mode even with "set |
3863 | non-stop off". */ | |
3864 | ||
3865 | static int | |
3866 | target_always_non_stop_p (void) | |
3867 | { | |
8b88a78e | 3868 | return current_top_target ()->always_non_stop_p (); |
fbea99ea PA |
3869 | } |
3870 | ||
3871 | /* See target.h. */ | |
3872 | ||
3873 | int | |
3874 | target_is_non_stop_p (void) | |
3875 | { | |
3876 | return (non_stop | |
3877 | || target_non_stop_enabled == AUTO_BOOLEAN_TRUE | |
3878 | || (target_non_stop_enabled == AUTO_BOOLEAN_AUTO | |
3879 | && target_always_non_stop_p ())); | |
3880 | } | |
3881 | ||
3882 | /* Controls if targets can report that they always run in non-stop | |
3883 | mode. This is just for maintainers to use when debugging gdb. */ | |
3884 | enum auto_boolean target_non_stop_enabled = AUTO_BOOLEAN_AUTO; | |
3885 | ||
3886 | /* The set command writes to this variable. If the inferior is | |
3887 | executing, target_non_stop_enabled is *not* updated. */ | |
3888 | static enum auto_boolean target_non_stop_enabled_1 = AUTO_BOOLEAN_AUTO; | |
3889 | ||
3890 | /* Implementation of "maint set target-non-stop". */ | |
3891 | ||
3892 | static void | |
eb4c3f4a | 3893 | maint_set_target_non_stop_command (const char *args, int from_tty, |
fbea99ea PA |
3894 | struct cmd_list_element *c) |
3895 | { | |
3896 | if (have_live_inferiors ()) | |
3897 | { | |
3898 | target_non_stop_enabled_1 = target_non_stop_enabled; | |
3899 | error (_("Cannot change this setting while the inferior is running.")); | |
3900 | } | |
3901 | ||
3902 | target_non_stop_enabled = target_non_stop_enabled_1; | |
3903 | } | |
3904 | ||
3905 | /* Implementation of "maint show target-non-stop". */ | |
3906 | ||
3907 | static void | |
3908 | maint_show_target_non_stop_command (struct ui_file *file, int from_tty, | |
3909 | struct cmd_list_element *c, | |
3910 | const char *value) | |
3911 | { | |
3912 | if (target_non_stop_enabled == AUTO_BOOLEAN_AUTO) | |
3913 | fprintf_filtered (file, | |
3914 | _("Whether the target is always in non-stop mode " | |
3915 | "is %s (currently %s).\n"), value, | |
3916 | target_always_non_stop_p () ? "on" : "off"); | |
3917 | else | |
3918 | fprintf_filtered (file, | |
3919 | _("Whether the target is always in non-stop mode " | |
3920 | "is %s.\n"), value); | |
3921 | } | |
3922 | ||
d914c394 SS |
3923 | /* Temporary copies of permission settings. */ |
3924 | ||
3925 | static int may_write_registers_1 = 1; | |
3926 | static int may_write_memory_1 = 1; | |
3927 | static int may_insert_breakpoints_1 = 1; | |
3928 | static int may_insert_tracepoints_1 = 1; | |
3929 | static int may_insert_fast_tracepoints_1 = 1; | |
3930 | static int may_stop_1 = 1; | |
3931 | ||
3932 | /* Make the user-set values match the real values again. */ | |
3933 | ||
3934 | void | |
3935 | update_target_permissions (void) | |
3936 | { | |
3937 | may_write_registers_1 = may_write_registers; | |
3938 | may_write_memory_1 = may_write_memory; | |
3939 | may_insert_breakpoints_1 = may_insert_breakpoints; | |
3940 | may_insert_tracepoints_1 = may_insert_tracepoints; | |
3941 | may_insert_fast_tracepoints_1 = may_insert_fast_tracepoints; | |
3942 | may_stop_1 = may_stop; | |
3943 | } | |
3944 | ||
3945 | /* The one function handles (most of) the permission flags in the same | |
3946 | way. */ | |
3947 | ||
3948 | static void | |
eb4c3f4a | 3949 | set_target_permissions (const char *args, int from_tty, |
d914c394 SS |
3950 | struct cmd_list_element *c) |
3951 | { | |
3952 | if (target_has_execution) | |
3953 | { | |
3954 | update_target_permissions (); | |
3955 | error (_("Cannot change this setting while the inferior is running.")); | |
3956 | } | |
3957 | ||
3958 | /* Make the real values match the user-changed values. */ | |
3959 | may_write_registers = may_write_registers_1; | |
3960 | may_insert_breakpoints = may_insert_breakpoints_1; | |
3961 | may_insert_tracepoints = may_insert_tracepoints_1; | |
3962 | may_insert_fast_tracepoints = may_insert_fast_tracepoints_1; | |
3963 | may_stop = may_stop_1; | |
3964 | update_observer_mode (); | |
3965 | } | |
3966 | ||
3967 | /* Set memory write permission independently of observer mode. */ | |
3968 | ||
3969 | static void | |
eb4c3f4a | 3970 | set_write_memory_permission (const char *args, int from_tty, |
d914c394 SS |
3971 | struct cmd_list_element *c) |
3972 | { | |
3973 | /* Make the real values match the user-changed values. */ | |
3974 | may_write_memory = may_write_memory_1; | |
3975 | update_observer_mode (); | |
3976 | } | |
3977 | ||
c906108c | 3978 | void |
fba45db2 | 3979 | initialize_targets (void) |
c906108c | 3980 | { |
06b5b831 | 3981 | push_target (&the_dummy_target); |
f6ac5f3d PA |
3982 | |
3983 | the_debug_target = new debug_target (); | |
c906108c | 3984 | |
11db9430 SM |
3985 | add_info ("target", info_target_command, targ_desc); |
3986 | add_info ("files", info_target_command, targ_desc); | |
c906108c | 3987 | |
ccce17b0 | 3988 | add_setshow_zuinteger_cmd ("target", class_maintenance, &targetdebug, _("\ |
85c07804 AC |
3989 | Set target debugging."), _("\ |
3990 | Show target debugging."), _("\ | |
333dabeb | 3991 | When non-zero, target debugging is enabled. Higher numbers are more\n\ |
3cecbbbe TT |
3992 | verbose."), |
3993 | set_targetdebug, | |
ccce17b0 YQ |
3994 | show_targetdebug, |
3995 | &setdebuglist, &showdebuglist); | |
3a11626d | 3996 | |
2bc416ba | 3997 | add_setshow_boolean_cmd ("trust-readonly-sections", class_support, |
7915a72c AC |
3998 | &trust_readonly, _("\ |
3999 | Set mode for reading from readonly sections."), _("\ | |
4000 | Show mode for reading from readonly sections."), _("\ | |
3a11626d MS |
4001 | When this mode is on, memory reads from readonly sections (such as .text)\n\ |
4002 | will be read from the object file instead of from the target. This will\n\ | |
7915a72c | 4003 | result in significant performance improvement for remote targets."), |
2c5b56ce | 4004 | NULL, |
920d2a44 | 4005 | show_trust_readonly, |
e707bbc2 | 4006 | &setlist, &showlist); |
96baa820 JM |
4007 | |
4008 | add_com ("monitor", class_obscure, do_monitor_command, | |
1bedd215 | 4009 | _("Send a command to the remote monitor (remote targets only).")); |
96baa820 | 4010 | |
87680a14 JB |
4011 | add_cmd ("target-stack", class_maintenance, maintenance_print_target_stack, |
4012 | _("Print the name of each layer of the internal target stack."), | |
4013 | &maintenanceprintlist); | |
4014 | ||
c6ebd6cf VP |
4015 | add_setshow_boolean_cmd ("target-async", no_class, |
4016 | &target_async_permitted_1, _("\ | |
4017 | Set whether gdb controls the inferior in asynchronous mode."), _("\ | |
4018 | Show whether gdb controls the inferior in asynchronous mode."), _("\ | |
4019 | Tells gdb whether to control the inferior in asynchronous mode."), | |
329ea579 PA |
4020 | maint_set_target_async_command, |
4021 | maint_show_target_async_command, | |
4022 | &maintenance_set_cmdlist, | |
4023 | &maintenance_show_cmdlist); | |
c6ebd6cf | 4024 | |
fbea99ea PA |
4025 | add_setshow_auto_boolean_cmd ("target-non-stop", no_class, |
4026 | &target_non_stop_enabled_1, _("\ | |
4027 | Set whether gdb always controls the inferior in non-stop mode."), _("\ | |
4028 | Show whether gdb always controls the inferior in non-stop mode."), _("\ | |
4029 | Tells gdb whether to control the inferior in non-stop mode."), | |
4030 | maint_set_target_non_stop_command, | |
4031 | maint_show_target_non_stop_command, | |
4032 | &maintenance_set_cmdlist, | |
4033 | &maintenance_show_cmdlist); | |
4034 | ||
d914c394 SS |
4035 | add_setshow_boolean_cmd ("may-write-registers", class_support, |
4036 | &may_write_registers_1, _("\ | |
4037 | Set permission to write into registers."), _("\ | |
4038 | Show permission to write into registers."), _("\ | |
4039 | When this permission is on, GDB may write into the target's registers.\n\ | |
4040 | Otherwise, any sort of write attempt will result in an error."), | |
4041 | set_target_permissions, NULL, | |
4042 | &setlist, &showlist); | |
4043 | ||
4044 | add_setshow_boolean_cmd ("may-write-memory", class_support, | |
4045 | &may_write_memory_1, _("\ | |
4046 | Set permission to write into target memory."), _("\ | |
4047 | Show permission to write into target memory."), _("\ | |
4048 | When this permission is on, GDB may write into the target's memory.\n\ | |
4049 | Otherwise, any sort of write attempt will result in an error."), | |
4050 | set_write_memory_permission, NULL, | |
4051 | &setlist, &showlist); | |
4052 | ||
4053 | add_setshow_boolean_cmd ("may-insert-breakpoints", class_support, | |
4054 | &may_insert_breakpoints_1, _("\ | |
4055 | Set permission to insert breakpoints in the target."), _("\ | |
4056 | Show permission to insert breakpoints in the target."), _("\ | |
4057 | When this permission is on, GDB may insert breakpoints in the program.\n\ | |
4058 | Otherwise, any sort of insertion attempt will result in an error."), | |
4059 | set_target_permissions, NULL, | |
4060 | &setlist, &showlist); | |
4061 | ||
4062 | add_setshow_boolean_cmd ("may-insert-tracepoints", class_support, | |
4063 | &may_insert_tracepoints_1, _("\ | |
4064 | Set permission to insert tracepoints in the target."), _("\ | |
4065 | Show permission to insert tracepoints in the target."), _("\ | |
4066 | When this permission is on, GDB may insert tracepoints in the program.\n\ | |
4067 | Otherwise, any sort of insertion attempt will result in an error."), | |
4068 | set_target_permissions, NULL, | |
4069 | &setlist, &showlist); | |
4070 | ||
4071 | add_setshow_boolean_cmd ("may-insert-fast-tracepoints", class_support, | |
4072 | &may_insert_fast_tracepoints_1, _("\ | |
4073 | Set permission to insert fast tracepoints in the target."), _("\ | |
4074 | Show permission to insert fast tracepoints in the target."), _("\ | |
4075 | When this permission is on, GDB may insert fast tracepoints.\n\ | |
4076 | Otherwise, any sort of insertion attempt will result in an error."), | |
4077 | set_target_permissions, NULL, | |
4078 | &setlist, &showlist); | |
4079 | ||
4080 | add_setshow_boolean_cmd ("may-interrupt", class_support, | |
4081 | &may_stop_1, _("\ | |
4082 | Set permission to interrupt or signal the target."), _("\ | |
4083 | Show permission to interrupt or signal the target."), _("\ | |
4084 | When this permission is on, GDB may interrupt/stop the target's execution.\n\ | |
4085 | Otherwise, any attempt to interrupt or stop will be ignored."), | |
4086 | set_target_permissions, NULL, | |
4087 | &setlist, &showlist); | |
6a3cb8e8 | 4088 | |
78cbbba8 LM |
4089 | add_com ("flash-erase", no_class, flash_erase_command, |
4090 | _("Erase all flash memory regions.")); | |
4091 | ||
6a3cb8e8 PA |
4092 | add_setshow_boolean_cmd ("auto-connect-native-target", class_support, |
4093 | &auto_connect_native_target, _("\ | |
4094 | Set whether GDB may automatically connect to the native target."), _("\ | |
4095 | Show whether GDB may automatically connect to the native target."), _("\ | |
4096 | When on, and GDB is not connected to a target yet, GDB\n\ | |
4097 | attempts \"run\" and other commands with the native target."), | |
4098 | NULL, show_auto_connect_native_target, | |
4099 | &setlist, &showlist); | |
c906108c | 4100 | } |