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c906108c | 1 | /* Select target systems and architectures at runtime for GDB. |
7998dfc3 | 2 | |
ecd75fc8 | 3 | Copyright (C) 1990-2014 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" |
9e35dae4 | 36 | #include "exceptions.h" |
424163ea | 37 | #include "target-descriptions.h" |
e1ac3328 | 38 | #include "gdbthread.h" |
b9db4ced | 39 | #include "solib.h" |
07b82ea5 | 40 | #include "exec.h" |
edb3359d | 41 | #include "inline-frame.h" |
2f4d8875 | 42 | #include "tracepoint.h" |
7313baad | 43 | #include "gdb/fileio.h" |
8ffcbaaf | 44 | #include "agent.h" |
8de71aab | 45 | #include "auxv.h" |
a7068b60 | 46 | #include "target-debug.h" |
c906108c | 47 | |
a14ed312 | 48 | static void target_info (char *, int); |
c906108c | 49 | |
f0f9ff95 TT |
50 | static void generic_tls_error (void) ATTRIBUTE_NORETURN; |
51 | ||
0a4f40a2 | 52 | static void default_terminal_info (struct target_ops *, const char *, int); |
c906108c | 53 | |
5009afc5 AS |
54 | static int default_watchpoint_addr_within_range (struct target_ops *, |
55 | CORE_ADDR, CORE_ADDR, int); | |
56 | ||
31568a15 TT |
57 | static int default_region_ok_for_hw_watchpoint (struct target_ops *, |
58 | CORE_ADDR, int); | |
e0d24f8d | 59 | |
a30bf1f1 | 60 | static void default_rcmd (struct target_ops *, const char *, struct ui_file *); |
a53f3625 | 61 | |
4229b31d TT |
62 | static ptid_t default_get_ada_task_ptid (struct target_ops *self, |
63 | long lwp, long tid); | |
64 | ||
098dba18 TT |
65 | static int default_follow_fork (struct target_ops *self, int follow_child, |
66 | int detach_fork); | |
67 | ||
8d657035 TT |
68 | static void default_mourn_inferior (struct target_ops *self); |
69 | ||
58a5184e TT |
70 | static int default_search_memory (struct target_ops *ops, |
71 | CORE_ADDR start_addr, | |
72 | ULONGEST search_space_len, | |
73 | const gdb_byte *pattern, | |
74 | ULONGEST pattern_len, | |
75 | CORE_ADDR *found_addrp); | |
76 | ||
936d2992 PA |
77 | static int default_verify_memory (struct target_ops *self, |
78 | const gdb_byte *data, | |
79 | CORE_ADDR memaddr, ULONGEST size); | |
80 | ||
8eaff7cd TT |
81 | static struct address_space *default_thread_address_space |
82 | (struct target_ops *self, ptid_t ptid); | |
83 | ||
c25c4a8b | 84 | static void tcomplain (void) ATTRIBUTE_NORETURN; |
c906108c | 85 | |
555bbdeb TT |
86 | static int return_zero (struct target_ops *); |
87 | ||
88 | static int return_zero_has_execution (struct target_ops *, ptid_t); | |
c906108c | 89 | |
a14ed312 | 90 | static void target_command (char *, int); |
c906108c | 91 | |
a14ed312 | 92 | static struct target_ops *find_default_run_target (char *); |
c906108c | 93 | |
c2250ad1 UW |
94 | static struct gdbarch *default_thread_architecture (struct target_ops *ops, |
95 | ptid_t ptid); | |
96 | ||
0b5a2719 TT |
97 | static int dummy_find_memory_regions (struct target_ops *self, |
98 | find_memory_region_ftype ignore1, | |
99 | void *ignore2); | |
100 | ||
16f796b1 TT |
101 | static char *dummy_make_corefile_notes (struct target_ops *self, |
102 | bfd *ignore1, int *ignore2); | |
103 | ||
770234d3 TT |
104 | static char *default_pid_to_str (struct target_ops *ops, ptid_t ptid); |
105 | ||
fe31bf5b TT |
106 | static enum exec_direction_kind default_execution_direction |
107 | (struct target_ops *self); | |
108 | ||
c0eca49f TT |
109 | static CORE_ADDR default_target_decr_pc_after_break (struct target_ops *ops, |
110 | struct gdbarch *gdbarch); | |
111 | ||
a7068b60 TT |
112 | static struct target_ops debug_target; |
113 | ||
1101cb7b TT |
114 | #include "target-delegates.c" |
115 | ||
a14ed312 | 116 | static void init_dummy_target (void); |
c906108c | 117 | |
3cecbbbe TT |
118 | static void update_current_target (void); |
119 | ||
89a1c21a SM |
120 | /* Vector of existing target structures. */ |
121 | typedef struct target_ops *target_ops_p; | |
122 | DEF_VEC_P (target_ops_p); | |
123 | static VEC (target_ops_p) *target_structs; | |
c906108c SS |
124 | |
125 | /* The initial current target, so that there is always a semi-valid | |
126 | current target. */ | |
127 | ||
128 | static struct target_ops dummy_target; | |
129 | ||
130 | /* Top of target stack. */ | |
131 | ||
258b763a | 132 | static struct target_ops *target_stack; |
c906108c SS |
133 | |
134 | /* The target structure we are currently using to talk to a process | |
135 | or file or whatever "inferior" we have. */ | |
136 | ||
137 | struct target_ops current_target; | |
138 | ||
139 | /* Command list for target. */ | |
140 | ||
141 | static struct cmd_list_element *targetlist = NULL; | |
142 | ||
cf7a04e8 DJ |
143 | /* Nonzero if we should trust readonly sections from the |
144 | executable when reading memory. */ | |
145 | ||
146 | static int trust_readonly = 0; | |
147 | ||
8defab1a DJ |
148 | /* Nonzero if we should show true memory content including |
149 | memory breakpoint inserted by gdb. */ | |
150 | ||
151 | static int show_memory_breakpoints = 0; | |
152 | ||
d914c394 SS |
153 | /* These globals control whether GDB attempts to perform these |
154 | operations; they are useful for targets that need to prevent | |
155 | inadvertant disruption, such as in non-stop mode. */ | |
156 | ||
157 | int may_write_registers = 1; | |
158 | ||
159 | int may_write_memory = 1; | |
160 | ||
161 | int may_insert_breakpoints = 1; | |
162 | ||
163 | int may_insert_tracepoints = 1; | |
164 | ||
165 | int may_insert_fast_tracepoints = 1; | |
166 | ||
167 | int may_stop = 1; | |
168 | ||
c906108c SS |
169 | /* Non-zero if we want to see trace of target level stuff. */ |
170 | ||
ccce17b0 | 171 | static unsigned int targetdebug = 0; |
3cecbbbe TT |
172 | |
173 | static void | |
174 | set_targetdebug (char *args, int from_tty, struct cmd_list_element *c) | |
175 | { | |
176 | update_current_target (); | |
177 | } | |
178 | ||
920d2a44 AC |
179 | static void |
180 | show_targetdebug (struct ui_file *file, int from_tty, | |
181 | struct cmd_list_element *c, const char *value) | |
182 | { | |
183 | fprintf_filtered (file, _("Target debugging is %s.\n"), value); | |
184 | } | |
c906108c | 185 | |
a14ed312 | 186 | static void setup_target_debug (void); |
c906108c | 187 | |
c906108c SS |
188 | /* The user just typed 'target' without the name of a target. */ |
189 | ||
c906108c | 190 | static void |
fba45db2 | 191 | target_command (char *arg, int from_tty) |
c906108c SS |
192 | { |
193 | fputs_filtered ("Argument required (target name). Try `help target'\n", | |
194 | gdb_stdout); | |
195 | } | |
196 | ||
c35b1492 PA |
197 | /* Default target_has_* methods for process_stratum targets. */ |
198 | ||
199 | int | |
200 | default_child_has_all_memory (struct target_ops *ops) | |
201 | { | |
202 | /* If no inferior selected, then we can't read memory here. */ | |
203 | if (ptid_equal (inferior_ptid, null_ptid)) | |
204 | return 0; | |
205 | ||
206 | return 1; | |
207 | } | |
208 | ||
209 | int | |
210 | default_child_has_memory (struct target_ops *ops) | |
211 | { | |
212 | /* If no inferior selected, then we can't read memory here. */ | |
213 | if (ptid_equal (inferior_ptid, null_ptid)) | |
214 | return 0; | |
215 | ||
216 | return 1; | |
217 | } | |
218 | ||
219 | int | |
220 | default_child_has_stack (struct target_ops *ops) | |
221 | { | |
222 | /* If no inferior selected, there's no stack. */ | |
223 | if (ptid_equal (inferior_ptid, null_ptid)) | |
224 | return 0; | |
225 | ||
226 | return 1; | |
227 | } | |
228 | ||
229 | int | |
230 | default_child_has_registers (struct target_ops *ops) | |
231 | { | |
232 | /* Can't read registers from no inferior. */ | |
233 | if (ptid_equal (inferior_ptid, null_ptid)) | |
234 | return 0; | |
235 | ||
236 | return 1; | |
237 | } | |
238 | ||
239 | int | |
aeaec162 | 240 | default_child_has_execution (struct target_ops *ops, ptid_t the_ptid) |
c35b1492 PA |
241 | { |
242 | /* If there's no thread selected, then we can't make it run through | |
243 | hoops. */ | |
aeaec162 | 244 | if (ptid_equal (the_ptid, null_ptid)) |
c35b1492 PA |
245 | return 0; |
246 | ||
247 | return 1; | |
248 | } | |
249 | ||
250 | ||
251 | int | |
252 | target_has_all_memory_1 (void) | |
253 | { | |
254 | struct target_ops *t; | |
255 | ||
256 | for (t = current_target.beneath; t != NULL; t = t->beneath) | |
257 | if (t->to_has_all_memory (t)) | |
258 | return 1; | |
259 | ||
260 | return 0; | |
261 | } | |
262 | ||
263 | int | |
264 | target_has_memory_1 (void) | |
265 | { | |
266 | struct target_ops *t; | |
267 | ||
268 | for (t = current_target.beneath; t != NULL; t = t->beneath) | |
269 | if (t->to_has_memory (t)) | |
270 | return 1; | |
271 | ||
272 | return 0; | |
273 | } | |
274 | ||
275 | int | |
276 | target_has_stack_1 (void) | |
277 | { | |
278 | struct target_ops *t; | |
279 | ||
280 | for (t = current_target.beneath; t != NULL; t = t->beneath) | |
281 | if (t->to_has_stack (t)) | |
282 | return 1; | |
283 | ||
284 | return 0; | |
285 | } | |
286 | ||
287 | int | |
288 | target_has_registers_1 (void) | |
289 | { | |
290 | struct target_ops *t; | |
291 | ||
292 | for (t = current_target.beneath; t != NULL; t = t->beneath) | |
293 | if (t->to_has_registers (t)) | |
294 | return 1; | |
295 | ||
296 | return 0; | |
297 | } | |
298 | ||
299 | int | |
aeaec162 | 300 | target_has_execution_1 (ptid_t the_ptid) |
c35b1492 PA |
301 | { |
302 | struct target_ops *t; | |
303 | ||
304 | for (t = current_target.beneath; t != NULL; t = t->beneath) | |
aeaec162 | 305 | if (t->to_has_execution (t, the_ptid)) |
c35b1492 PA |
306 | return 1; |
307 | ||
308 | return 0; | |
309 | } | |
310 | ||
aeaec162 TT |
311 | int |
312 | target_has_execution_current (void) | |
313 | { | |
314 | return target_has_execution_1 (inferior_ptid); | |
315 | } | |
316 | ||
c22a2b88 TT |
317 | /* Complete initialization of T. This ensures that various fields in |
318 | T are set, if needed by the target implementation. */ | |
c906108c SS |
319 | |
320 | void | |
c22a2b88 | 321 | complete_target_initialization (struct target_ops *t) |
c906108c | 322 | { |
0088c768 | 323 | /* Provide default values for all "must have" methods. */ |
0088c768 | 324 | |
c35b1492 | 325 | if (t->to_has_all_memory == NULL) |
555bbdeb | 326 | t->to_has_all_memory = return_zero; |
c35b1492 PA |
327 | |
328 | if (t->to_has_memory == NULL) | |
555bbdeb | 329 | t->to_has_memory = return_zero; |
c35b1492 PA |
330 | |
331 | if (t->to_has_stack == NULL) | |
555bbdeb | 332 | t->to_has_stack = return_zero; |
c35b1492 PA |
333 | |
334 | if (t->to_has_registers == NULL) | |
555bbdeb | 335 | t->to_has_registers = return_zero; |
c35b1492 PA |
336 | |
337 | if (t->to_has_execution == NULL) | |
555bbdeb | 338 | t->to_has_execution = return_zero_has_execution; |
1101cb7b | 339 | |
b3ccfe11 TT |
340 | /* These methods can be called on an unpushed target and so require |
341 | a default implementation if the target might plausibly be the | |
342 | default run target. */ | |
343 | gdb_assert (t->to_can_run == NULL || (t->to_can_async_p != NULL | |
344 | && t->to_supports_non_stop != NULL)); | |
345 | ||
1101cb7b | 346 | install_delegators (t); |
c22a2b88 TT |
347 | } |
348 | ||
8981c758 TT |
349 | /* This is used to implement the various target commands. */ |
350 | ||
351 | static void | |
352 | open_target (char *args, int from_tty, struct cmd_list_element *command) | |
353 | { | |
354 | struct target_ops *ops = get_cmd_context (command); | |
355 | ||
356 | if (targetdebug) | |
357 | fprintf_unfiltered (gdb_stdlog, "-> %s->to_open (...)\n", | |
358 | ops->to_shortname); | |
359 | ||
360 | ops->to_open (args, from_tty); | |
361 | ||
362 | if (targetdebug) | |
363 | fprintf_unfiltered (gdb_stdlog, "<- %s->to_open (%s, %d)\n", | |
364 | ops->to_shortname, args, from_tty); | |
365 | } | |
366 | ||
c22a2b88 TT |
367 | /* Add possible target architecture T to the list and add a new |
368 | command 'target T->to_shortname'. Set COMPLETER as the command's | |
369 | completer if not NULL. */ | |
370 | ||
371 | void | |
372 | add_target_with_completer (struct target_ops *t, | |
373 | completer_ftype *completer) | |
374 | { | |
375 | struct cmd_list_element *c; | |
376 | ||
377 | complete_target_initialization (t); | |
c35b1492 | 378 | |
89a1c21a | 379 | VEC_safe_push (target_ops_p, target_structs, t); |
c906108c SS |
380 | |
381 | if (targetlist == NULL) | |
1bedd215 AC |
382 | add_prefix_cmd ("target", class_run, target_command, _("\ |
383 | Connect to a target machine or process.\n\ | |
c906108c SS |
384 | The first argument is the type or protocol of the target machine.\n\ |
385 | Remaining arguments are interpreted by the target protocol. For more\n\ | |
386 | information on the arguments for a particular protocol, type\n\ | |
1bedd215 | 387 | `help target ' followed by the protocol name."), |
c906108c | 388 | &targetlist, "target ", 0, &cmdlist); |
8981c758 TT |
389 | c = add_cmd (t->to_shortname, no_class, NULL, t->to_doc, &targetlist); |
390 | set_cmd_sfunc (c, open_target); | |
391 | set_cmd_context (c, t); | |
9852c492 YQ |
392 | if (completer != NULL) |
393 | set_cmd_completer (c, completer); | |
394 | } | |
395 | ||
396 | /* Add a possible target architecture to the list. */ | |
397 | ||
398 | void | |
399 | add_target (struct target_ops *t) | |
400 | { | |
401 | add_target_with_completer (t, NULL); | |
c906108c SS |
402 | } |
403 | ||
b48d48eb MM |
404 | /* See target.h. */ |
405 | ||
406 | void | |
407 | add_deprecated_target_alias (struct target_ops *t, char *alias) | |
408 | { | |
409 | struct cmd_list_element *c; | |
410 | char *alt; | |
411 | ||
412 | /* If we use add_alias_cmd, here, we do not get the deprecated warning, | |
413 | see PR cli/15104. */ | |
8981c758 TT |
414 | c = add_cmd (alias, no_class, NULL, t->to_doc, &targetlist); |
415 | set_cmd_sfunc (c, open_target); | |
416 | set_cmd_context (c, t); | |
b48d48eb MM |
417 | alt = xstrprintf ("target %s", t->to_shortname); |
418 | deprecate_cmd (c, alt); | |
419 | } | |
420 | ||
c906108c SS |
421 | /* Stub functions */ |
422 | ||
7d85a9c0 JB |
423 | void |
424 | target_kill (void) | |
425 | { | |
423a4807 | 426 | current_target.to_kill (¤t_target); |
7d85a9c0 JB |
427 | } |
428 | ||
11cf8741 | 429 | void |
9cbe5fff | 430 | target_load (const char *arg, int from_tty) |
11cf8741 | 431 | { |
4e5d721f | 432 | target_dcache_invalidate (); |
71a9f134 | 433 | (*current_target.to_load) (¤t_target, arg, from_tty); |
11cf8741 JM |
434 | } |
435 | ||
d9d2d8b6 PA |
436 | void |
437 | target_terminal_inferior (void) | |
438 | { | |
439 | /* A background resume (``run&'') should leave GDB in control of the | |
c378eb4e | 440 | terminal. Use target_can_async_p, not target_is_async_p, since at |
ba7f6c64 VP |
441 | this point the target is not async yet. However, if sync_execution |
442 | is not set, we know it will become async prior to resume. */ | |
443 | if (target_can_async_p () && !sync_execution) | |
d9d2d8b6 PA |
444 | return; |
445 | ||
446 | /* If GDB is resuming the inferior in the foreground, install | |
447 | inferior's terminal modes. */ | |
d2f640d4 | 448 | (*current_target.to_terminal_inferior) (¤t_target); |
d9d2d8b6 | 449 | } |
136d6dae | 450 | |
b0ed115f TT |
451 | /* See target.h. */ |
452 | ||
453 | int | |
454 | target_supports_terminal_ours (void) | |
455 | { | |
456 | struct target_ops *t; | |
457 | ||
458 | for (t = current_target.beneath; t != NULL; t = t->beneath) | |
459 | { | |
460 | if (t->to_terminal_ours != delegate_terminal_ours | |
461 | && t->to_terminal_ours != tdefault_terminal_ours) | |
462 | return 1; | |
463 | } | |
464 | ||
465 | return 0; | |
466 | } | |
467 | ||
c906108c | 468 | static void |
fba45db2 | 469 | tcomplain (void) |
c906108c | 470 | { |
8a3fe4f8 | 471 | error (_("You can't do that when your target is `%s'"), |
c906108c SS |
472 | current_target.to_shortname); |
473 | } | |
474 | ||
475 | void | |
fba45db2 | 476 | noprocess (void) |
c906108c | 477 | { |
8a3fe4f8 | 478 | error (_("You can't do that without a process to debug.")); |
c906108c SS |
479 | } |
480 | ||
c906108c | 481 | static void |
0a4f40a2 | 482 | default_terminal_info (struct target_ops *self, const char *args, int from_tty) |
c906108c | 483 | { |
a3f17187 | 484 | printf_unfiltered (_("No saved terminal information.\n")); |
c906108c SS |
485 | } |
486 | ||
0ef643c8 JB |
487 | /* A default implementation for the to_get_ada_task_ptid target method. |
488 | ||
489 | This function builds the PTID by using both LWP and TID as part of | |
490 | the PTID lwp and tid elements. The pid used is the pid of the | |
491 | inferior_ptid. */ | |
492 | ||
2c0b251b | 493 | static ptid_t |
1e6b91a4 | 494 | default_get_ada_task_ptid (struct target_ops *self, long lwp, long tid) |
0ef643c8 JB |
495 | { |
496 | return ptid_build (ptid_get_pid (inferior_ptid), lwp, tid); | |
497 | } | |
498 | ||
32231432 | 499 | static enum exec_direction_kind |
4c612759 | 500 | default_execution_direction (struct target_ops *self) |
32231432 PA |
501 | { |
502 | if (!target_can_execute_reverse) | |
503 | return EXEC_FORWARD; | |
504 | else if (!target_can_async_p ()) | |
505 | return EXEC_FORWARD; | |
506 | else | |
507 | gdb_assert_not_reached ("\ | |
508 | to_execution_direction must be implemented for reverse async"); | |
509 | } | |
510 | ||
7998dfc3 AC |
511 | /* Go through the target stack from top to bottom, copying over zero |
512 | entries in current_target, then filling in still empty entries. In | |
513 | effect, we are doing class inheritance through the pushed target | |
514 | vectors. | |
515 | ||
516 | NOTE: cagney/2003-10-17: The problem with this inheritance, as it | |
517 | is currently implemented, is that it discards any knowledge of | |
518 | which target an inherited method originally belonged to. | |
519 | Consequently, new new target methods should instead explicitly and | |
520 | locally search the target stack for the target that can handle the | |
521 | request. */ | |
c906108c SS |
522 | |
523 | static void | |
7998dfc3 | 524 | update_current_target (void) |
c906108c | 525 | { |
7998dfc3 AC |
526 | struct target_ops *t; |
527 | ||
08d8bcd7 | 528 | /* First, reset current's contents. */ |
7998dfc3 AC |
529 | memset (¤t_target, 0, sizeof (current_target)); |
530 | ||
1101cb7b TT |
531 | /* Install the delegators. */ |
532 | install_delegators (¤t_target); | |
533 | ||
be4ddd36 TT |
534 | current_target.to_stratum = target_stack->to_stratum; |
535 | ||
7998dfc3 AC |
536 | #define INHERIT(FIELD, TARGET) \ |
537 | if (!current_target.FIELD) \ | |
538 | current_target.FIELD = (TARGET)->FIELD | |
539 | ||
be4ddd36 TT |
540 | /* Do not add any new INHERITs here. Instead, use the delegation |
541 | mechanism provided by make-target-delegates. */ | |
7998dfc3 AC |
542 | for (t = target_stack; t; t = t->beneath) |
543 | { | |
544 | INHERIT (to_shortname, t); | |
545 | INHERIT (to_longname, t); | |
dc177b7a | 546 | INHERIT (to_attach_no_wait, t); |
74174d2e | 547 | INHERIT (to_have_steppable_watchpoint, t); |
7998dfc3 | 548 | INHERIT (to_have_continuable_watchpoint, t); |
7998dfc3 | 549 | INHERIT (to_has_thread_control, t); |
7998dfc3 AC |
550 | } |
551 | #undef INHERIT | |
552 | ||
7998dfc3 AC |
553 | /* Finally, position the target-stack beneath the squashed |
554 | "current_target". That way code looking for a non-inherited | |
555 | target method can quickly and simply find it. */ | |
556 | current_target.beneath = target_stack; | |
b4b61fdb DJ |
557 | |
558 | if (targetdebug) | |
559 | setup_target_debug (); | |
c906108c SS |
560 | } |
561 | ||
562 | /* Push a new target type into the stack of the existing target accessors, | |
563 | possibly superseding some of the existing accessors. | |
564 | ||
c906108c SS |
565 | Rather than allow an empty stack, we always have the dummy target at |
566 | the bottom stratum, so we can call the function vectors without | |
567 | checking them. */ | |
568 | ||
b26a4dcb | 569 | void |
fba45db2 | 570 | push_target (struct target_ops *t) |
c906108c | 571 | { |
258b763a | 572 | struct target_ops **cur; |
c906108c SS |
573 | |
574 | /* Check magic number. If wrong, it probably means someone changed | |
575 | the struct definition, but not all the places that initialize one. */ | |
576 | if (t->to_magic != OPS_MAGIC) | |
577 | { | |
c5aa993b JM |
578 | fprintf_unfiltered (gdb_stderr, |
579 | "Magic number of %s target struct wrong\n", | |
580 | t->to_shortname); | |
3e43a32a MS |
581 | internal_error (__FILE__, __LINE__, |
582 | _("failed internal consistency check")); | |
c906108c SS |
583 | } |
584 | ||
258b763a AC |
585 | /* Find the proper stratum to install this target in. */ |
586 | for (cur = &target_stack; (*cur) != NULL; cur = &(*cur)->beneath) | |
c906108c | 587 | { |
258b763a | 588 | if ((int) (t->to_stratum) >= (int) (*cur)->to_stratum) |
c906108c SS |
589 | break; |
590 | } | |
591 | ||
258b763a | 592 | /* If there's already targets at this stratum, remove them. */ |
88c231eb | 593 | /* FIXME: cagney/2003-10-15: I think this should be popping all |
258b763a AC |
594 | targets to CUR, and not just those at this stratum level. */ |
595 | while ((*cur) != NULL && t->to_stratum == (*cur)->to_stratum) | |
596 | { | |
597 | /* There's already something at this stratum level. Close it, | |
598 | and un-hook it from the stack. */ | |
599 | struct target_ops *tmp = (*cur); | |
5d502164 | 600 | |
258b763a AC |
601 | (*cur) = (*cur)->beneath; |
602 | tmp->beneath = NULL; | |
460014f5 | 603 | target_close (tmp); |
258b763a | 604 | } |
c906108c SS |
605 | |
606 | /* We have removed all targets in our stratum, now add the new one. */ | |
258b763a AC |
607 | t->beneath = (*cur); |
608 | (*cur) = t; | |
c906108c SS |
609 | |
610 | update_current_target (); | |
c906108c SS |
611 | } |
612 | ||
2bc416ba | 613 | /* Remove a target_ops vector from the stack, wherever it may be. |
c906108c SS |
614 | Return how many times it was removed (0 or 1). */ |
615 | ||
616 | int | |
fba45db2 | 617 | unpush_target (struct target_ops *t) |
c906108c | 618 | { |
258b763a AC |
619 | struct target_ops **cur; |
620 | struct target_ops *tmp; | |
c906108c | 621 | |
c8d104ad PA |
622 | if (t->to_stratum == dummy_stratum) |
623 | internal_error (__FILE__, __LINE__, | |
9b20d036 | 624 | _("Attempt to unpush the dummy target")); |
c8d104ad | 625 | |
c906108c | 626 | /* Look for the specified target. Note that we assume that a target |
c378eb4e | 627 | can only occur once in the target stack. */ |
c906108c | 628 | |
258b763a AC |
629 | for (cur = &target_stack; (*cur) != NULL; cur = &(*cur)->beneath) |
630 | { | |
631 | if ((*cur) == t) | |
632 | break; | |
633 | } | |
c906108c | 634 | |
305436e0 PA |
635 | /* If we don't find target_ops, quit. Only open targets should be |
636 | closed. */ | |
258b763a | 637 | if ((*cur) == NULL) |
305436e0 | 638 | return 0; |
5269965e | 639 | |
c378eb4e | 640 | /* Unchain the target. */ |
258b763a AC |
641 | tmp = (*cur); |
642 | (*cur) = (*cur)->beneath; | |
643 | tmp->beneath = NULL; | |
c906108c SS |
644 | |
645 | update_current_target (); | |
c906108c | 646 | |
305436e0 PA |
647 | /* Finally close the target. Note we do this after unchaining, so |
648 | any target method calls from within the target_close | |
649 | implementation don't end up in T anymore. */ | |
460014f5 | 650 | target_close (t); |
305436e0 | 651 | |
c906108c SS |
652 | return 1; |
653 | } | |
654 | ||
aa76d38d | 655 | void |
460014f5 | 656 | pop_all_targets_above (enum strata above_stratum) |
aa76d38d | 657 | { |
87ab71f0 | 658 | while ((int) (current_target.to_stratum) > (int) above_stratum) |
aa76d38d | 659 | { |
aa76d38d PA |
660 | if (!unpush_target (target_stack)) |
661 | { | |
662 | fprintf_unfiltered (gdb_stderr, | |
663 | "pop_all_targets couldn't find target %s\n", | |
b52323fa | 664 | target_stack->to_shortname); |
aa76d38d PA |
665 | internal_error (__FILE__, __LINE__, |
666 | _("failed internal consistency check")); | |
667 | break; | |
668 | } | |
669 | } | |
670 | } | |
671 | ||
87ab71f0 | 672 | void |
460014f5 | 673 | pop_all_targets (void) |
87ab71f0 | 674 | { |
460014f5 | 675 | pop_all_targets_above (dummy_stratum); |
87ab71f0 PA |
676 | } |
677 | ||
c0edd9ed JK |
678 | /* Return 1 if T is now pushed in the target stack. Return 0 otherwise. */ |
679 | ||
680 | int | |
681 | target_is_pushed (struct target_ops *t) | |
682 | { | |
84202f9c | 683 | struct target_ops *cur; |
c0edd9ed JK |
684 | |
685 | /* Check magic number. If wrong, it probably means someone changed | |
686 | the struct definition, but not all the places that initialize one. */ | |
687 | if (t->to_magic != OPS_MAGIC) | |
688 | { | |
689 | fprintf_unfiltered (gdb_stderr, | |
690 | "Magic number of %s target struct wrong\n", | |
691 | t->to_shortname); | |
3e43a32a MS |
692 | internal_error (__FILE__, __LINE__, |
693 | _("failed internal consistency check")); | |
c0edd9ed JK |
694 | } |
695 | ||
84202f9c TT |
696 | for (cur = target_stack; cur != NULL; cur = cur->beneath) |
697 | if (cur == t) | |
c0edd9ed JK |
698 | return 1; |
699 | ||
700 | return 0; | |
701 | } | |
702 | ||
f0f9ff95 TT |
703 | /* Default implementation of to_get_thread_local_address. */ |
704 | ||
705 | static void | |
706 | generic_tls_error (void) | |
707 | { | |
708 | throw_error (TLS_GENERIC_ERROR, | |
709 | _("Cannot find thread-local variables on this target")); | |
710 | } | |
711 | ||
72f5cf0e | 712 | /* Using the objfile specified in OBJFILE, find the address for the |
9e35dae4 DJ |
713 | current thread's thread-local storage with offset OFFSET. */ |
714 | CORE_ADDR | |
715 | target_translate_tls_address (struct objfile *objfile, CORE_ADDR offset) | |
716 | { | |
717 | volatile CORE_ADDR addr = 0; | |
f0f9ff95 | 718 | struct target_ops *target = ¤t_target; |
9e35dae4 | 719 | |
f0f9ff95 | 720 | if (gdbarch_fetch_tls_load_module_address_p (target_gdbarch ())) |
9e35dae4 DJ |
721 | { |
722 | ptid_t ptid = inferior_ptid; | |
723 | volatile struct gdb_exception ex; | |
724 | ||
725 | TRY_CATCH (ex, RETURN_MASK_ALL) | |
726 | { | |
727 | CORE_ADDR lm_addr; | |
728 | ||
729 | /* Fetch the load module address for this objfile. */ | |
f5656ead | 730 | lm_addr = gdbarch_fetch_tls_load_module_address (target_gdbarch (), |
9e35dae4 | 731 | objfile); |
9e35dae4 | 732 | |
3e43a32a MS |
733 | addr = target->to_get_thread_local_address (target, ptid, |
734 | lm_addr, offset); | |
9e35dae4 DJ |
735 | } |
736 | /* If an error occurred, print TLS related messages here. Otherwise, | |
737 | throw the error to some higher catcher. */ | |
738 | if (ex.reason < 0) | |
739 | { | |
740 | int objfile_is_library = (objfile->flags & OBJF_SHARED); | |
741 | ||
742 | switch (ex.error) | |
743 | { | |
744 | case TLS_NO_LIBRARY_SUPPORT_ERROR: | |
3e43a32a MS |
745 | error (_("Cannot find thread-local variables " |
746 | "in this thread library.")); | |
9e35dae4 DJ |
747 | break; |
748 | case TLS_LOAD_MODULE_NOT_FOUND_ERROR: | |
749 | if (objfile_is_library) | |
750 | error (_("Cannot find shared library `%s' in dynamic" | |
4262abfb | 751 | " linker's load module list"), objfile_name (objfile)); |
9e35dae4 DJ |
752 | else |
753 | error (_("Cannot find executable file `%s' in dynamic" | |
4262abfb | 754 | " linker's load module list"), objfile_name (objfile)); |
9e35dae4 DJ |
755 | break; |
756 | case TLS_NOT_ALLOCATED_YET_ERROR: | |
757 | if (objfile_is_library) | |
758 | error (_("The inferior has not yet allocated storage for" | |
759 | " thread-local variables in\n" | |
760 | "the shared library `%s'\n" | |
761 | "for %s"), | |
4262abfb | 762 | objfile_name (objfile), target_pid_to_str (ptid)); |
9e35dae4 DJ |
763 | else |
764 | error (_("The inferior has not yet allocated storage for" | |
765 | " thread-local variables in\n" | |
766 | "the executable `%s'\n" | |
767 | "for %s"), | |
4262abfb | 768 | objfile_name (objfile), target_pid_to_str (ptid)); |
9e35dae4 DJ |
769 | break; |
770 | case TLS_GENERIC_ERROR: | |
771 | if (objfile_is_library) | |
772 | error (_("Cannot find thread-local storage for %s, " | |
773 | "shared library %s:\n%s"), | |
774 | target_pid_to_str (ptid), | |
4262abfb | 775 | objfile_name (objfile), ex.message); |
9e35dae4 DJ |
776 | else |
777 | error (_("Cannot find thread-local storage for %s, " | |
778 | "executable file %s:\n%s"), | |
779 | target_pid_to_str (ptid), | |
4262abfb | 780 | objfile_name (objfile), ex.message); |
9e35dae4 DJ |
781 | break; |
782 | default: | |
783 | throw_exception (ex); | |
784 | break; | |
785 | } | |
786 | } | |
787 | } | |
788 | /* It wouldn't be wrong here to try a gdbarch method, too; finding | |
789 | TLS is an ABI-specific thing. But we don't do that yet. */ | |
790 | else | |
791 | error (_("Cannot find thread-local variables on this target")); | |
792 | ||
793 | return addr; | |
794 | } | |
795 | ||
6be7b56e | 796 | const char * |
01cb8804 | 797 | target_xfer_status_to_string (enum target_xfer_status status) |
6be7b56e PA |
798 | { |
799 | #define CASE(X) case X: return #X | |
01cb8804 | 800 | switch (status) |
6be7b56e PA |
801 | { |
802 | CASE(TARGET_XFER_E_IO); | |
bc113b4e | 803 | CASE(TARGET_XFER_UNAVAILABLE); |
6be7b56e PA |
804 | default: |
805 | return "<unknown>"; | |
806 | } | |
807 | #undef CASE | |
808 | }; | |
809 | ||
810 | ||
c906108c SS |
811 | #undef MIN |
812 | #define MIN(A, B) (((A) <= (B)) ? (A) : (B)) | |
813 | ||
814 | /* target_read_string -- read a null terminated string, up to LEN bytes, | |
815 | from MEMADDR in target. Set *ERRNOP to the errno code, or 0 if successful. | |
816 | Set *STRING to a pointer to malloc'd memory containing the data; the caller | |
817 | is responsible for freeing it. Return the number of bytes successfully | |
818 | read. */ | |
819 | ||
820 | int | |
fba45db2 | 821 | target_read_string (CORE_ADDR memaddr, char **string, int len, int *errnop) |
c906108c | 822 | { |
c2e8b827 | 823 | int tlen, offset, i; |
1b0ba102 | 824 | gdb_byte buf[4]; |
c906108c SS |
825 | int errcode = 0; |
826 | char *buffer; | |
827 | int buffer_allocated; | |
828 | char *bufptr; | |
829 | unsigned int nbytes_read = 0; | |
830 | ||
6217bf3e MS |
831 | gdb_assert (string); |
832 | ||
c906108c SS |
833 | /* Small for testing. */ |
834 | buffer_allocated = 4; | |
835 | buffer = xmalloc (buffer_allocated); | |
836 | bufptr = buffer; | |
837 | ||
c906108c SS |
838 | while (len > 0) |
839 | { | |
840 | tlen = MIN (len, 4 - (memaddr & 3)); | |
841 | offset = memaddr & 3; | |
842 | ||
1b0ba102 | 843 | errcode = target_read_memory (memaddr & ~3, buf, sizeof buf); |
c906108c SS |
844 | if (errcode != 0) |
845 | { | |
846 | /* The transfer request might have crossed the boundary to an | |
c378eb4e | 847 | unallocated region of memory. Retry the transfer, requesting |
c906108c SS |
848 | a single byte. */ |
849 | tlen = 1; | |
850 | offset = 0; | |
b8eb5af0 | 851 | errcode = target_read_memory (memaddr, buf, 1); |
c906108c SS |
852 | if (errcode != 0) |
853 | goto done; | |
854 | } | |
855 | ||
856 | if (bufptr - buffer + tlen > buffer_allocated) | |
857 | { | |
858 | unsigned int bytes; | |
5d502164 | 859 | |
c906108c SS |
860 | bytes = bufptr - buffer; |
861 | buffer_allocated *= 2; | |
862 | buffer = xrealloc (buffer, buffer_allocated); | |
863 | bufptr = buffer + bytes; | |
864 | } | |
865 | ||
866 | for (i = 0; i < tlen; i++) | |
867 | { | |
868 | *bufptr++ = buf[i + offset]; | |
869 | if (buf[i + offset] == '\000') | |
870 | { | |
871 | nbytes_read += i + 1; | |
872 | goto done; | |
873 | } | |
874 | } | |
875 | ||
876 | memaddr += tlen; | |
877 | len -= tlen; | |
878 | nbytes_read += tlen; | |
879 | } | |
c5aa993b | 880 | done: |
6217bf3e | 881 | *string = buffer; |
c906108c SS |
882 | if (errnop != NULL) |
883 | *errnop = errcode; | |
c906108c SS |
884 | return nbytes_read; |
885 | } | |
886 | ||
07b82ea5 PA |
887 | struct target_section_table * |
888 | target_get_section_table (struct target_ops *target) | |
889 | { | |
7e35c012 | 890 | return (*target->to_get_section_table) (target); |
07b82ea5 PA |
891 | } |
892 | ||
8db32d44 | 893 | /* Find a section containing ADDR. */ |
07b82ea5 | 894 | |
0542c86d | 895 | struct target_section * |
8db32d44 AC |
896 | target_section_by_addr (struct target_ops *target, CORE_ADDR addr) |
897 | { | |
07b82ea5 | 898 | struct target_section_table *table = target_get_section_table (target); |
0542c86d | 899 | struct target_section *secp; |
07b82ea5 PA |
900 | |
901 | if (table == NULL) | |
902 | return NULL; | |
903 | ||
904 | for (secp = table->sections; secp < table->sections_end; secp++) | |
8db32d44 AC |
905 | { |
906 | if (addr >= secp->addr && addr < secp->endaddr) | |
907 | return secp; | |
908 | } | |
909 | return NULL; | |
910 | } | |
911 | ||
9f713294 YQ |
912 | /* Read memory from more than one valid target. A core file, for |
913 | instance, could have some of memory but delegate other bits to | |
914 | the target below it. So, we must manually try all targets. */ | |
915 | ||
9b409511 | 916 | static enum target_xfer_status |
17fde6d0 | 917 | raw_memory_xfer_partial (struct target_ops *ops, gdb_byte *readbuf, |
9b409511 YQ |
918 | const gdb_byte *writebuf, ULONGEST memaddr, LONGEST len, |
919 | ULONGEST *xfered_len) | |
9f713294 | 920 | { |
9b409511 | 921 | enum target_xfer_status res; |
9f713294 YQ |
922 | |
923 | do | |
924 | { | |
925 | res = ops->to_xfer_partial (ops, TARGET_OBJECT_MEMORY, NULL, | |
9b409511 YQ |
926 | readbuf, writebuf, memaddr, len, |
927 | xfered_len); | |
928 | if (res == TARGET_XFER_OK) | |
9f713294 YQ |
929 | break; |
930 | ||
633785ff | 931 | /* Stop if the target reports that the memory is not available. */ |
bc113b4e | 932 | if (res == TARGET_XFER_UNAVAILABLE) |
633785ff MM |
933 | break; |
934 | ||
9f713294 YQ |
935 | /* We want to continue past core files to executables, but not |
936 | past a running target's memory. */ | |
937 | if (ops->to_has_all_memory (ops)) | |
938 | break; | |
939 | ||
940 | ops = ops->beneath; | |
941 | } | |
942 | while (ops != NULL); | |
943 | ||
0f26cec1 PA |
944 | /* The cache works at the raw memory level. Make sure the cache |
945 | gets updated with raw contents no matter what kind of memory | |
946 | object was originally being written. Note we do write-through | |
947 | first, so that if it fails, we don't write to the cache contents | |
948 | that never made it to the target. */ | |
949 | if (writebuf != NULL | |
950 | && !ptid_equal (inferior_ptid, null_ptid) | |
951 | && target_dcache_init_p () | |
952 | && (stack_cache_enabled_p () || code_cache_enabled_p ())) | |
953 | { | |
954 | DCACHE *dcache = target_dcache_get (); | |
955 | ||
956 | /* Note that writing to an area of memory which wasn't present | |
957 | in the cache doesn't cause it to be loaded in. */ | |
958 | dcache_update (dcache, res, memaddr, writebuf, *xfered_len); | |
959 | } | |
960 | ||
9f713294 YQ |
961 | return res; |
962 | } | |
963 | ||
7f79c47e DE |
964 | /* Perform a partial memory transfer. |
965 | For docs see target.h, to_xfer_partial. */ | |
cf7a04e8 | 966 | |
9b409511 | 967 | static enum target_xfer_status |
f0ba3972 | 968 | memory_xfer_partial_1 (struct target_ops *ops, enum target_object object, |
17fde6d0 | 969 | gdb_byte *readbuf, const gdb_byte *writebuf, ULONGEST memaddr, |
9b409511 | 970 | ULONGEST len, ULONGEST *xfered_len) |
0779438d | 971 | { |
9b409511 | 972 | enum target_xfer_status res; |
cf7a04e8 DJ |
973 | int reg_len; |
974 | struct mem_region *region; | |
4e5d721f | 975 | struct inferior *inf; |
cf7a04e8 | 976 | |
07b82ea5 PA |
977 | /* For accesses to unmapped overlay sections, read directly from |
978 | files. Must do this first, as MEMADDR may need adjustment. */ | |
979 | if (readbuf != NULL && overlay_debugging) | |
980 | { | |
981 | struct obj_section *section = find_pc_overlay (memaddr); | |
5d502164 | 982 | |
07b82ea5 PA |
983 | if (pc_in_unmapped_range (memaddr, section)) |
984 | { | |
985 | struct target_section_table *table | |
986 | = target_get_section_table (ops); | |
987 | const char *section_name = section->the_bfd_section->name; | |
5d502164 | 988 | |
07b82ea5 PA |
989 | memaddr = overlay_mapped_address (memaddr, section); |
990 | return section_table_xfer_memory_partial (readbuf, writebuf, | |
9b409511 | 991 | memaddr, len, xfered_len, |
07b82ea5 PA |
992 | table->sections, |
993 | table->sections_end, | |
994 | section_name); | |
995 | } | |
996 | } | |
997 | ||
998 | /* Try the executable files, if "trust-readonly-sections" is set. */ | |
cf7a04e8 DJ |
999 | if (readbuf != NULL && trust_readonly) |
1000 | { | |
0542c86d | 1001 | struct target_section *secp; |
07b82ea5 | 1002 | struct target_section_table *table; |
cf7a04e8 DJ |
1003 | |
1004 | secp = target_section_by_addr (ops, memaddr); | |
1005 | if (secp != NULL | |
2b2848e2 DE |
1006 | && (bfd_get_section_flags (secp->the_bfd_section->owner, |
1007 | secp->the_bfd_section) | |
cf7a04e8 | 1008 | & SEC_READONLY)) |
07b82ea5 PA |
1009 | { |
1010 | table = target_get_section_table (ops); | |
1011 | return section_table_xfer_memory_partial (readbuf, writebuf, | |
9b409511 | 1012 | memaddr, len, xfered_len, |
07b82ea5 PA |
1013 | table->sections, |
1014 | table->sections_end, | |
1015 | NULL); | |
1016 | } | |
98646950 UW |
1017 | } |
1018 | ||
cf7a04e8 DJ |
1019 | /* Try GDB's internal data cache. */ |
1020 | region = lookup_mem_region (memaddr); | |
4b5752d0 VP |
1021 | /* region->hi == 0 means there's no upper bound. */ |
1022 | if (memaddr + len < region->hi || region->hi == 0) | |
cf7a04e8 DJ |
1023 | reg_len = len; |
1024 | else | |
1025 | reg_len = region->hi - memaddr; | |
1026 | ||
1027 | switch (region->attrib.mode) | |
1028 | { | |
1029 | case MEM_RO: | |
1030 | if (writebuf != NULL) | |
2ed4b548 | 1031 | return TARGET_XFER_E_IO; |
cf7a04e8 DJ |
1032 | break; |
1033 | ||
1034 | case MEM_WO: | |
1035 | if (readbuf != NULL) | |
2ed4b548 | 1036 | return TARGET_XFER_E_IO; |
cf7a04e8 | 1037 | break; |
a76d924d DJ |
1038 | |
1039 | case MEM_FLASH: | |
1040 | /* We only support writing to flash during "load" for now. */ | |
1041 | if (writebuf != NULL) | |
1042 | error (_("Writing to flash memory forbidden in this context")); | |
1043 | break; | |
4b5752d0 VP |
1044 | |
1045 | case MEM_NONE: | |
2ed4b548 | 1046 | return TARGET_XFER_E_IO; |
cf7a04e8 DJ |
1047 | } |
1048 | ||
6c95b8df PA |
1049 | if (!ptid_equal (inferior_ptid, null_ptid)) |
1050 | inf = find_inferior_pid (ptid_get_pid (inferior_ptid)); | |
1051 | else | |
1052 | inf = NULL; | |
4e5d721f DE |
1053 | |
1054 | if (inf != NULL | |
0f26cec1 | 1055 | && readbuf != NULL |
2f4d8875 PA |
1056 | /* The dcache reads whole cache lines; that doesn't play well |
1057 | with reading from a trace buffer, because reading outside of | |
1058 | the collected memory range fails. */ | |
1059 | && get_traceframe_number () == -1 | |
4e5d721f | 1060 | && (region->attrib.cache |
29453a14 YQ |
1061 | || (stack_cache_enabled_p () && object == TARGET_OBJECT_STACK_MEMORY) |
1062 | || (code_cache_enabled_p () && object == TARGET_OBJECT_CODE_MEMORY))) | |
cf7a04e8 | 1063 | { |
2a2f9fe4 YQ |
1064 | DCACHE *dcache = target_dcache_get_or_init (); |
1065 | ||
0f26cec1 PA |
1066 | return dcache_read_memory_partial (ops, dcache, memaddr, readbuf, |
1067 | reg_len, xfered_len); | |
cf7a04e8 DJ |
1068 | } |
1069 | ||
1070 | /* If none of those methods found the memory we wanted, fall back | |
1071 | to a target partial transfer. Normally a single call to | |
1072 | to_xfer_partial is enough; if it doesn't recognize an object | |
1073 | it will call the to_xfer_partial of the next target down. | |
1074 | But for memory this won't do. Memory is the only target | |
9b409511 YQ |
1075 | object which can be read from more than one valid target. |
1076 | A core file, for instance, could have some of memory but | |
1077 | delegate other bits to the target below it. So, we must | |
1078 | manually try all targets. */ | |
1079 | ||
1080 | res = raw_memory_xfer_partial (ops, readbuf, writebuf, memaddr, reg_len, | |
1081 | xfered_len); | |
cf7a04e8 DJ |
1082 | |
1083 | /* If we still haven't got anything, return the last error. We | |
1084 | give up. */ | |
1085 | return res; | |
0779438d AC |
1086 | } |
1087 | ||
f0ba3972 PA |
1088 | /* Perform a partial memory transfer. For docs see target.h, |
1089 | to_xfer_partial. */ | |
1090 | ||
9b409511 | 1091 | static enum target_xfer_status |
f0ba3972 | 1092 | memory_xfer_partial (struct target_ops *ops, enum target_object object, |
9b409511 YQ |
1093 | gdb_byte *readbuf, const gdb_byte *writebuf, |
1094 | ULONGEST memaddr, ULONGEST len, ULONGEST *xfered_len) | |
f0ba3972 | 1095 | { |
9b409511 | 1096 | enum target_xfer_status res; |
f0ba3972 PA |
1097 | |
1098 | /* Zero length requests are ok and require no work. */ | |
1099 | if (len == 0) | |
9b409511 | 1100 | return TARGET_XFER_EOF; |
f0ba3972 PA |
1101 | |
1102 | /* Fill in READBUF with breakpoint shadows, or WRITEBUF with | |
1103 | breakpoint insns, thus hiding out from higher layers whether | |
1104 | there are software breakpoints inserted in the code stream. */ | |
1105 | if (readbuf != NULL) | |
1106 | { | |
9b409511 YQ |
1107 | res = memory_xfer_partial_1 (ops, object, readbuf, NULL, memaddr, len, |
1108 | xfered_len); | |
f0ba3972 | 1109 | |
9b409511 | 1110 | if (res == TARGET_XFER_OK && !show_memory_breakpoints) |
c63528fc | 1111 | breakpoint_xfer_memory (readbuf, NULL, NULL, memaddr, *xfered_len); |
f0ba3972 PA |
1112 | } |
1113 | else | |
1114 | { | |
1115 | void *buf; | |
1116 | struct cleanup *old_chain; | |
1117 | ||
67c059c2 AB |
1118 | /* A large write request is likely to be partially satisfied |
1119 | by memory_xfer_partial_1. We will continually malloc | |
1120 | and free a copy of the entire write request for breakpoint | |
1121 | shadow handling even though we only end up writing a small | |
1122 | subset of it. Cap writes to 4KB to mitigate this. */ | |
1123 | len = min (4096, len); | |
1124 | ||
f0ba3972 PA |
1125 | buf = xmalloc (len); |
1126 | old_chain = make_cleanup (xfree, buf); | |
1127 | memcpy (buf, writebuf, len); | |
1128 | ||
1129 | breakpoint_xfer_memory (NULL, buf, writebuf, memaddr, len); | |
9b409511 YQ |
1130 | res = memory_xfer_partial_1 (ops, object, NULL, buf, memaddr, len, |
1131 | xfered_len); | |
f0ba3972 PA |
1132 | |
1133 | do_cleanups (old_chain); | |
1134 | } | |
1135 | ||
1136 | return res; | |
1137 | } | |
1138 | ||
8defab1a DJ |
1139 | static void |
1140 | restore_show_memory_breakpoints (void *arg) | |
1141 | { | |
1142 | show_memory_breakpoints = (uintptr_t) arg; | |
1143 | } | |
1144 | ||
1145 | struct cleanup * | |
1146 | make_show_memory_breakpoints_cleanup (int show) | |
1147 | { | |
1148 | int current = show_memory_breakpoints; | |
8defab1a | 1149 | |
5d502164 | 1150 | show_memory_breakpoints = show; |
8defab1a DJ |
1151 | return make_cleanup (restore_show_memory_breakpoints, |
1152 | (void *) (uintptr_t) current); | |
1153 | } | |
1154 | ||
7f79c47e DE |
1155 | /* For docs see target.h, to_xfer_partial. */ |
1156 | ||
9b409511 | 1157 | enum target_xfer_status |
27394598 AC |
1158 | target_xfer_partial (struct target_ops *ops, |
1159 | enum target_object object, const char *annex, | |
4ac248ca | 1160 | gdb_byte *readbuf, const gdb_byte *writebuf, |
9b409511 YQ |
1161 | ULONGEST offset, ULONGEST len, |
1162 | ULONGEST *xfered_len) | |
27394598 | 1163 | { |
9b409511 | 1164 | enum target_xfer_status retval; |
27394598 AC |
1165 | |
1166 | gdb_assert (ops->to_xfer_partial != NULL); | |
cf7a04e8 | 1167 | |
ce6d0892 YQ |
1168 | /* Transfer is done when LEN is zero. */ |
1169 | if (len == 0) | |
9b409511 | 1170 | return TARGET_XFER_EOF; |
ce6d0892 | 1171 | |
d914c394 SS |
1172 | if (writebuf && !may_write_memory) |
1173 | error (_("Writing to memory is not allowed (addr %s, len %s)"), | |
1174 | core_addr_to_string_nz (offset), plongest (len)); | |
1175 | ||
9b409511 YQ |
1176 | *xfered_len = 0; |
1177 | ||
cf7a04e8 DJ |
1178 | /* If this is a memory transfer, let the memory-specific code |
1179 | have a look at it instead. Memory transfers are more | |
1180 | complicated. */ | |
29453a14 YQ |
1181 | if (object == TARGET_OBJECT_MEMORY || object == TARGET_OBJECT_STACK_MEMORY |
1182 | || object == TARGET_OBJECT_CODE_MEMORY) | |
4e5d721f | 1183 | retval = memory_xfer_partial (ops, object, readbuf, |
9b409511 | 1184 | writebuf, offset, len, xfered_len); |
9f713294 | 1185 | else if (object == TARGET_OBJECT_RAW_MEMORY) |
cf7a04e8 | 1186 | { |
9f713294 | 1187 | /* Request the normal memory object from other layers. */ |
9b409511 YQ |
1188 | retval = raw_memory_xfer_partial (ops, readbuf, writebuf, offset, len, |
1189 | xfered_len); | |
cf7a04e8 | 1190 | } |
9f713294 YQ |
1191 | else |
1192 | retval = ops->to_xfer_partial (ops, object, annex, readbuf, | |
9b409511 | 1193 | writebuf, offset, len, xfered_len); |
cf7a04e8 | 1194 | |
27394598 AC |
1195 | if (targetdebug) |
1196 | { | |
1197 | const unsigned char *myaddr = NULL; | |
1198 | ||
1199 | fprintf_unfiltered (gdb_stdlog, | |
3e43a32a | 1200 | "%s:target_xfer_partial " |
9b409511 | 1201 | "(%d, %s, %s, %s, %s, %s) = %d, %s", |
27394598 AC |
1202 | ops->to_shortname, |
1203 | (int) object, | |
1204 | (annex ? annex : "(null)"), | |
53b71562 JB |
1205 | host_address_to_string (readbuf), |
1206 | host_address_to_string (writebuf), | |
0b1553bc | 1207 | core_addr_to_string_nz (offset), |
9b409511 YQ |
1208 | pulongest (len), retval, |
1209 | pulongest (*xfered_len)); | |
27394598 AC |
1210 | |
1211 | if (readbuf) | |
1212 | myaddr = readbuf; | |
1213 | if (writebuf) | |
1214 | myaddr = writebuf; | |
9b409511 | 1215 | if (retval == TARGET_XFER_OK && myaddr != NULL) |
27394598 AC |
1216 | { |
1217 | int i; | |
2bc416ba | 1218 | |
27394598 | 1219 | fputs_unfiltered (", bytes =", gdb_stdlog); |
9b409511 | 1220 | for (i = 0; i < *xfered_len; i++) |
27394598 | 1221 | { |
53b71562 | 1222 | if ((((intptr_t) &(myaddr[i])) & 0xf) == 0) |
27394598 AC |
1223 | { |
1224 | if (targetdebug < 2 && i > 0) | |
1225 | { | |
1226 | fprintf_unfiltered (gdb_stdlog, " ..."); | |
1227 | break; | |
1228 | } | |
1229 | fprintf_unfiltered (gdb_stdlog, "\n"); | |
1230 | } | |
2bc416ba | 1231 | |
27394598 AC |
1232 | fprintf_unfiltered (gdb_stdlog, " %02x", myaddr[i] & 0xff); |
1233 | } | |
1234 | } | |
2bc416ba | 1235 | |
27394598 AC |
1236 | fputc_unfiltered ('\n', gdb_stdlog); |
1237 | } | |
9b409511 YQ |
1238 | |
1239 | /* Check implementations of to_xfer_partial update *XFERED_LEN | |
1240 | properly. Do assertion after printing debug messages, so that we | |
1241 | can find more clues on assertion failure from debugging messages. */ | |
bc113b4e | 1242 | if (retval == TARGET_XFER_OK || retval == TARGET_XFER_UNAVAILABLE) |
9b409511 YQ |
1243 | gdb_assert (*xfered_len > 0); |
1244 | ||
27394598 AC |
1245 | return retval; |
1246 | } | |
1247 | ||
578d3588 PA |
1248 | /* Read LEN bytes of target memory at address MEMADDR, placing the |
1249 | results in GDB's memory at MYADDR. Returns either 0 for success or | |
9b409511 | 1250 | TARGET_XFER_E_IO if any error occurs. |
c906108c SS |
1251 | |
1252 | If an error occurs, no guarantee is made about the contents of the data at | |
1253 | MYADDR. In particular, the caller should not depend upon partial reads | |
1254 | filling the buffer with good data. There is no way for the caller to know | |
1255 | how much good data might have been transfered anyway. Callers that can | |
cf7a04e8 | 1256 | deal with partial reads should call target_read (which will retry until |
c378eb4e | 1257 | it makes no progress, and then return how much was transferred). */ |
c906108c SS |
1258 | |
1259 | int | |
1b162304 | 1260 | target_read_memory (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len) |
c906108c | 1261 | { |
c35b1492 PA |
1262 | /* Dispatch to the topmost target, not the flattened current_target. |
1263 | Memory accesses check target->to_has_(all_)memory, and the | |
1264 | flattened target doesn't inherit those. */ | |
1265 | if (target_read (current_target.beneath, TARGET_OBJECT_MEMORY, NULL, | |
cf7a04e8 DJ |
1266 | myaddr, memaddr, len) == len) |
1267 | return 0; | |
0779438d | 1268 | else |
578d3588 | 1269 | return TARGET_XFER_E_IO; |
c906108c SS |
1270 | } |
1271 | ||
aee4bf85 PA |
1272 | /* Like target_read_memory, but specify explicitly that this is a read |
1273 | from the target's raw memory. That is, this read bypasses the | |
1274 | dcache, breakpoint shadowing, etc. */ | |
1275 | ||
1276 | int | |
1277 | target_read_raw_memory (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len) | |
1278 | { | |
1279 | /* See comment in target_read_memory about why the request starts at | |
1280 | current_target.beneath. */ | |
1281 | if (target_read (current_target.beneath, TARGET_OBJECT_RAW_MEMORY, NULL, | |
1282 | myaddr, memaddr, len) == len) | |
1283 | return 0; | |
1284 | else | |
1285 | return TARGET_XFER_E_IO; | |
1286 | } | |
1287 | ||
4e5d721f DE |
1288 | /* Like target_read_memory, but specify explicitly that this is a read from |
1289 | the target's stack. This may trigger different cache behavior. */ | |
1290 | ||
1291 | int | |
45aa4659 | 1292 | target_read_stack (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len) |
4e5d721f | 1293 | { |
aee4bf85 PA |
1294 | /* See comment in target_read_memory about why the request starts at |
1295 | current_target.beneath. */ | |
4e5d721f DE |
1296 | if (target_read (current_target.beneath, TARGET_OBJECT_STACK_MEMORY, NULL, |
1297 | myaddr, memaddr, len) == len) | |
1298 | return 0; | |
1299 | else | |
578d3588 | 1300 | return TARGET_XFER_E_IO; |
4e5d721f DE |
1301 | } |
1302 | ||
29453a14 YQ |
1303 | /* Like target_read_memory, but specify explicitly that this is a read from |
1304 | the target's code. This may trigger different cache behavior. */ | |
1305 | ||
1306 | int | |
1307 | target_read_code (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len) | |
1308 | { | |
aee4bf85 PA |
1309 | /* See comment in target_read_memory about why the request starts at |
1310 | current_target.beneath. */ | |
29453a14 YQ |
1311 | if (target_read (current_target.beneath, TARGET_OBJECT_CODE_MEMORY, NULL, |
1312 | myaddr, memaddr, len) == len) | |
1313 | return 0; | |
1314 | else | |
1315 | return TARGET_XFER_E_IO; | |
1316 | } | |
1317 | ||
7f79c47e | 1318 | /* Write LEN bytes from MYADDR to target memory at address MEMADDR. |
9b409511 | 1319 | Returns either 0 for success or TARGET_XFER_E_IO if any |
578d3588 PA |
1320 | error occurs. If an error occurs, no guarantee is made about how |
1321 | much data got written. Callers that can deal with partial writes | |
1322 | should call target_write. */ | |
7f79c47e | 1323 | |
c906108c | 1324 | int |
45aa4659 | 1325 | target_write_memory (CORE_ADDR memaddr, const gdb_byte *myaddr, ssize_t len) |
c906108c | 1326 | { |
aee4bf85 PA |
1327 | /* See comment in target_read_memory about why the request starts at |
1328 | current_target.beneath. */ | |
c35b1492 | 1329 | if (target_write (current_target.beneath, TARGET_OBJECT_MEMORY, NULL, |
cf7a04e8 DJ |
1330 | myaddr, memaddr, len) == len) |
1331 | return 0; | |
0779438d | 1332 | else |
578d3588 | 1333 | return TARGET_XFER_E_IO; |
c906108c | 1334 | } |
c5aa993b | 1335 | |
f0ba3972 | 1336 | /* Write LEN bytes from MYADDR to target raw memory at address |
9b409511 | 1337 | MEMADDR. Returns either 0 for success or TARGET_XFER_E_IO |
578d3588 PA |
1338 | if any error occurs. If an error occurs, no guarantee is made |
1339 | about how much data got written. Callers that can deal with | |
1340 | partial writes should call target_write. */ | |
f0ba3972 PA |
1341 | |
1342 | int | |
45aa4659 | 1343 | target_write_raw_memory (CORE_ADDR memaddr, const gdb_byte *myaddr, ssize_t len) |
f0ba3972 | 1344 | { |
aee4bf85 PA |
1345 | /* See comment in target_read_memory about why the request starts at |
1346 | current_target.beneath. */ | |
f0ba3972 PA |
1347 | if (target_write (current_target.beneath, TARGET_OBJECT_RAW_MEMORY, NULL, |
1348 | myaddr, memaddr, len) == len) | |
1349 | return 0; | |
1350 | else | |
578d3588 | 1351 | return TARGET_XFER_E_IO; |
f0ba3972 PA |
1352 | } |
1353 | ||
fd79ecee DJ |
1354 | /* Fetch the target's memory map. */ |
1355 | ||
1356 | VEC(mem_region_s) * | |
1357 | target_memory_map (void) | |
1358 | { | |
1359 | VEC(mem_region_s) *result; | |
1360 | struct mem_region *last_one, *this_one; | |
1361 | int ix; | |
1362 | struct target_ops *t; | |
1363 | ||
6b2c5a57 | 1364 | result = current_target.to_memory_map (¤t_target); |
fd79ecee DJ |
1365 | if (result == NULL) |
1366 | return NULL; | |
1367 | ||
1368 | qsort (VEC_address (mem_region_s, result), | |
1369 | VEC_length (mem_region_s, result), | |
1370 | sizeof (struct mem_region), mem_region_cmp); | |
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. */ | |
1375 | last_one = NULL; | |
1376 | for (ix = 0; VEC_iterate (mem_region_s, result, ix, this_one); ix++) | |
1377 | { | |
1378 | this_one->number = ix; | |
1379 | ||
1380 | if (last_one && last_one->hi > this_one->lo) | |
1381 | { | |
1382 | warning (_("Overlapping regions in memory map: ignoring")); | |
1383 | VEC_free (mem_region_s, result); | |
1384 | return NULL; | |
1385 | } | |
1386 | last_one = this_one; | |
1387 | } | |
1388 | ||
1389 | return result; | |
1390 | } | |
1391 | ||
a76d924d DJ |
1392 | void |
1393 | target_flash_erase (ULONGEST address, LONGEST length) | |
1394 | { | |
e8a6c6ac | 1395 | current_target.to_flash_erase (¤t_target, address, length); |
a76d924d DJ |
1396 | } |
1397 | ||
1398 | void | |
1399 | target_flash_done (void) | |
1400 | { | |
f6fb2925 | 1401 | current_target.to_flash_done (¤t_target); |
a76d924d DJ |
1402 | } |
1403 | ||
920d2a44 AC |
1404 | static void |
1405 | show_trust_readonly (struct ui_file *file, int from_tty, | |
1406 | struct cmd_list_element *c, const char *value) | |
1407 | { | |
3e43a32a MS |
1408 | fprintf_filtered (file, |
1409 | _("Mode for reading from readonly sections is %s.\n"), | |
920d2a44 AC |
1410 | value); |
1411 | } | |
3a11626d | 1412 | |
7f79c47e | 1413 | /* Target vector read/write partial wrapper functions. */ |
0088c768 | 1414 | |
9b409511 | 1415 | static enum target_xfer_status |
1e3ff5ad AC |
1416 | target_read_partial (struct target_ops *ops, |
1417 | enum target_object object, | |
1b0ba102 | 1418 | const char *annex, gdb_byte *buf, |
9b409511 YQ |
1419 | ULONGEST offset, ULONGEST len, |
1420 | ULONGEST *xfered_len) | |
1e3ff5ad | 1421 | { |
9b409511 YQ |
1422 | return target_xfer_partial (ops, object, annex, buf, NULL, offset, len, |
1423 | xfered_len); | |
1e3ff5ad AC |
1424 | } |
1425 | ||
8a55ffb0 | 1426 | static enum target_xfer_status |
1e3ff5ad AC |
1427 | target_write_partial (struct target_ops *ops, |
1428 | enum target_object object, | |
1b0ba102 | 1429 | const char *annex, const gdb_byte *buf, |
9b409511 | 1430 | ULONGEST offset, LONGEST len, ULONGEST *xfered_len) |
1e3ff5ad | 1431 | { |
9b409511 YQ |
1432 | return target_xfer_partial (ops, object, annex, NULL, buf, offset, len, |
1433 | xfered_len); | |
1e3ff5ad AC |
1434 | } |
1435 | ||
1436 | /* Wrappers to perform the full transfer. */ | |
7f79c47e DE |
1437 | |
1438 | /* For docs on target_read see target.h. */ | |
1439 | ||
1e3ff5ad AC |
1440 | LONGEST |
1441 | target_read (struct target_ops *ops, | |
1442 | enum target_object object, | |
1b0ba102 | 1443 | const char *annex, gdb_byte *buf, |
1e3ff5ad AC |
1444 | ULONGEST offset, LONGEST len) |
1445 | { | |
1446 | LONGEST xfered = 0; | |
5d502164 | 1447 | |
1e3ff5ad AC |
1448 | while (xfered < len) |
1449 | { | |
9b409511 YQ |
1450 | ULONGEST xfered_len; |
1451 | enum target_xfer_status status; | |
1452 | ||
1453 | status = target_read_partial (ops, object, annex, | |
1454 | (gdb_byte *) buf + xfered, | |
1455 | offset + xfered, len - xfered, | |
1456 | &xfered_len); | |
5d502164 | 1457 | |
1e3ff5ad | 1458 | /* Call an observer, notifying them of the xfer progress? */ |
9b409511 | 1459 | if (status == TARGET_XFER_EOF) |
13547ab6 | 1460 | return xfered; |
9b409511 YQ |
1461 | else if (status == TARGET_XFER_OK) |
1462 | { | |
1463 | xfered += xfered_len; | |
1464 | QUIT; | |
1465 | } | |
1466 | else | |
0088c768 | 1467 | return -1; |
9b409511 | 1468 | |
1e3ff5ad AC |
1469 | } |
1470 | return len; | |
1471 | } | |
1472 | ||
f1a507a1 JB |
1473 | /* Assuming that the entire [begin, end) range of memory cannot be |
1474 | read, try to read whatever subrange is possible to read. | |
1475 | ||
1476 | The function returns, in RESULT, either zero or one memory block. | |
1477 | If there's a readable subrange at the beginning, it is completely | |
1478 | read and returned. Any further readable subrange will not be read. | |
1479 | Otherwise, if there's a readable subrange at the end, it will be | |
1480 | completely read and returned. Any readable subranges before it | |
1481 | (obviously, not starting at the beginning), will be ignored. In | |
1482 | other cases -- either no readable subrange, or readable subrange(s) | |
1483 | that is neither at the beginning, or end, nothing is returned. | |
1484 | ||
1485 | The purpose of this function is to handle a read across a boundary | |
1486 | of accessible memory in a case when memory map is not available. | |
1487 | The above restrictions are fine for this case, but will give | |
1488 | incorrect results if the memory is 'patchy'. However, supporting | |
1489 | 'patchy' memory would require trying to read every single byte, | |
1490 | and it seems unacceptable solution. Explicit memory map is | |
1491 | recommended for this case -- and target_read_memory_robust will | |
1492 | take care of reading multiple ranges then. */ | |
8dedea02 VP |
1493 | |
1494 | static void | |
3e43a32a MS |
1495 | read_whatever_is_readable (struct target_ops *ops, |
1496 | ULONGEST begin, ULONGEST end, | |
8dedea02 | 1497 | VEC(memory_read_result_s) **result) |
d5086790 | 1498 | { |
f1a507a1 | 1499 | gdb_byte *buf = xmalloc (end - begin); |
8dedea02 VP |
1500 | ULONGEST current_begin = begin; |
1501 | ULONGEST current_end = end; | |
1502 | int forward; | |
1503 | memory_read_result_s r; | |
9b409511 | 1504 | ULONGEST xfered_len; |
8dedea02 VP |
1505 | |
1506 | /* If we previously failed to read 1 byte, nothing can be done here. */ | |
1507 | if (end - begin <= 1) | |
13b3fd9b MS |
1508 | { |
1509 | xfree (buf); | |
1510 | return; | |
1511 | } | |
8dedea02 VP |
1512 | |
1513 | /* Check that either first or the last byte is readable, and give up | |
c378eb4e | 1514 | if not. This heuristic is meant to permit reading accessible memory |
8dedea02 VP |
1515 | at the boundary of accessible region. */ |
1516 | if (target_read_partial (ops, TARGET_OBJECT_MEMORY, NULL, | |
9b409511 | 1517 | buf, begin, 1, &xfered_len) == TARGET_XFER_OK) |
8dedea02 VP |
1518 | { |
1519 | forward = 1; | |
1520 | ++current_begin; | |
1521 | } | |
1522 | else if (target_read_partial (ops, TARGET_OBJECT_MEMORY, NULL, | |
9b409511 YQ |
1523 | buf + (end-begin) - 1, end - 1, 1, |
1524 | &xfered_len) == TARGET_XFER_OK) | |
8dedea02 VP |
1525 | { |
1526 | forward = 0; | |
1527 | --current_end; | |
1528 | } | |
1529 | else | |
1530 | { | |
13b3fd9b | 1531 | xfree (buf); |
8dedea02 VP |
1532 | return; |
1533 | } | |
1534 | ||
1535 | /* Loop invariant is that the [current_begin, current_end) was previously | |
1536 | found to be not readable as a whole. | |
1537 | ||
1538 | Note loop condition -- if the range has 1 byte, we can't divide the range | |
1539 | so there's no point trying further. */ | |
1540 | while (current_end - current_begin > 1) | |
1541 | { | |
1542 | ULONGEST first_half_begin, first_half_end; | |
1543 | ULONGEST second_half_begin, second_half_end; | |
1544 | LONGEST xfer; | |
8dedea02 | 1545 | ULONGEST middle = current_begin + (current_end - current_begin)/2; |
f1a507a1 | 1546 | |
8dedea02 VP |
1547 | if (forward) |
1548 | { | |
1549 | first_half_begin = current_begin; | |
1550 | first_half_end = middle; | |
1551 | second_half_begin = middle; | |
1552 | second_half_end = current_end; | |
1553 | } | |
1554 | else | |
1555 | { | |
1556 | first_half_begin = middle; | |
1557 | first_half_end = current_end; | |
1558 | second_half_begin = current_begin; | |
1559 | second_half_end = middle; | |
1560 | } | |
1561 | ||
1562 | xfer = target_read (ops, TARGET_OBJECT_MEMORY, NULL, | |
1563 | buf + (first_half_begin - begin), | |
1564 | first_half_begin, | |
1565 | first_half_end - first_half_begin); | |
1566 | ||
1567 | if (xfer == first_half_end - first_half_begin) | |
1568 | { | |
c378eb4e | 1569 | /* This half reads up fine. So, the error must be in the |
3e43a32a | 1570 | other half. */ |
8dedea02 VP |
1571 | current_begin = second_half_begin; |
1572 | current_end = second_half_end; | |
1573 | } | |
1574 | else | |
1575 | { | |
c378eb4e MS |
1576 | /* This half is not readable. Because we've tried one byte, we |
1577 | know some part of this half if actually redable. Go to the next | |
8dedea02 VP |
1578 | iteration to divide again and try to read. |
1579 | ||
1580 | We don't handle the other half, because this function only tries | |
1581 | to read a single readable subrange. */ | |
1582 | current_begin = first_half_begin; | |
1583 | current_end = first_half_end; | |
1584 | } | |
1585 | } | |
1586 | ||
1587 | if (forward) | |
1588 | { | |
1589 | /* The [begin, current_begin) range has been read. */ | |
1590 | r.begin = begin; | |
1591 | r.end = current_begin; | |
1592 | r.data = buf; | |
1593 | } | |
1594 | else | |
1595 | { | |
1596 | /* The [current_end, end) range has been read. */ | |
1597 | LONGEST rlen = end - current_end; | |
f1a507a1 | 1598 | |
8dedea02 VP |
1599 | r.data = xmalloc (rlen); |
1600 | memcpy (r.data, buf + current_end - begin, rlen); | |
1601 | r.begin = current_end; | |
1602 | r.end = end; | |
1603 | xfree (buf); | |
1604 | } | |
1605 | VEC_safe_push(memory_read_result_s, (*result), &r); | |
1606 | } | |
1607 | ||
1608 | void | |
1609 | free_memory_read_result_vector (void *x) | |
1610 | { | |
1611 | VEC(memory_read_result_s) *v = x; | |
1612 | memory_read_result_s *current; | |
1613 | int ix; | |
1614 | ||
1615 | for (ix = 0; VEC_iterate (memory_read_result_s, v, ix, current); ++ix) | |
1616 | { | |
1617 | xfree (current->data); | |
1618 | } | |
1619 | VEC_free (memory_read_result_s, v); | |
1620 | } | |
1621 | ||
1622 | VEC(memory_read_result_s) * | |
1623 | read_memory_robust (struct target_ops *ops, ULONGEST offset, LONGEST len) | |
1624 | { | |
1625 | VEC(memory_read_result_s) *result = 0; | |
1626 | ||
1627 | LONGEST xfered = 0; | |
d5086790 VP |
1628 | while (xfered < len) |
1629 | { | |
8dedea02 VP |
1630 | struct mem_region *region = lookup_mem_region (offset + xfered); |
1631 | LONGEST rlen; | |
5d502164 | 1632 | |
8dedea02 VP |
1633 | /* If there is no explicit region, a fake one should be created. */ |
1634 | gdb_assert (region); | |
1635 | ||
1636 | if (region->hi == 0) | |
1637 | rlen = len - xfered; | |
1638 | else | |
1639 | rlen = region->hi - offset; | |
1640 | ||
1641 | if (region->attrib.mode == MEM_NONE || region->attrib.mode == MEM_WO) | |
d5086790 | 1642 | { |
c378eb4e | 1643 | /* Cannot read this region. Note that we can end up here only |
8dedea02 VP |
1644 | if the region is explicitly marked inaccessible, or |
1645 | 'inaccessible-by-default' is in effect. */ | |
1646 | xfered += rlen; | |
1647 | } | |
1648 | else | |
1649 | { | |
1650 | LONGEST to_read = min (len - xfered, rlen); | |
1651 | gdb_byte *buffer = (gdb_byte *)xmalloc (to_read); | |
1652 | ||
1653 | LONGEST xfer = target_read (ops, TARGET_OBJECT_MEMORY, NULL, | |
1654 | (gdb_byte *) buffer, | |
1655 | offset + xfered, to_read); | |
1656 | /* Call an observer, notifying them of the xfer progress? */ | |
d5086790 | 1657 | if (xfer <= 0) |
d5086790 | 1658 | { |
c378eb4e | 1659 | /* Got an error reading full chunk. See if maybe we can read |
8dedea02 VP |
1660 | some subrange. */ |
1661 | xfree (buffer); | |
3e43a32a MS |
1662 | read_whatever_is_readable (ops, offset + xfered, |
1663 | offset + xfered + to_read, &result); | |
8dedea02 | 1664 | xfered += to_read; |
d5086790 | 1665 | } |
8dedea02 VP |
1666 | else |
1667 | { | |
1668 | struct memory_read_result r; | |
1669 | r.data = buffer; | |
1670 | r.begin = offset + xfered; | |
1671 | r.end = r.begin + xfer; | |
1672 | VEC_safe_push (memory_read_result_s, result, &r); | |
1673 | xfered += xfer; | |
1674 | } | |
1675 | QUIT; | |
d5086790 | 1676 | } |
d5086790 | 1677 | } |
8dedea02 | 1678 | return result; |
d5086790 VP |
1679 | } |
1680 | ||
8dedea02 | 1681 | |
cf7a04e8 DJ |
1682 | /* An alternative to target_write with progress callbacks. */ |
1683 | ||
1e3ff5ad | 1684 | LONGEST |
cf7a04e8 DJ |
1685 | target_write_with_progress (struct target_ops *ops, |
1686 | enum target_object object, | |
1687 | const char *annex, const gdb_byte *buf, | |
1688 | ULONGEST offset, LONGEST len, | |
1689 | void (*progress) (ULONGEST, void *), void *baton) | |
1e3ff5ad AC |
1690 | { |
1691 | LONGEST xfered = 0; | |
a76d924d DJ |
1692 | |
1693 | /* Give the progress callback a chance to set up. */ | |
1694 | if (progress) | |
1695 | (*progress) (0, baton); | |
1696 | ||
1e3ff5ad AC |
1697 | while (xfered < len) |
1698 | { | |
9b409511 YQ |
1699 | ULONGEST xfered_len; |
1700 | enum target_xfer_status status; | |
1701 | ||
1702 | status = target_write_partial (ops, object, annex, | |
1703 | (gdb_byte *) buf + xfered, | |
1704 | offset + xfered, len - xfered, | |
1705 | &xfered_len); | |
cf7a04e8 | 1706 | |
5c328c05 YQ |
1707 | if (status != TARGET_XFER_OK) |
1708 | return status == TARGET_XFER_EOF ? xfered : -1; | |
cf7a04e8 DJ |
1709 | |
1710 | if (progress) | |
9b409511 | 1711 | (*progress) (xfered_len, baton); |
cf7a04e8 | 1712 | |
9b409511 | 1713 | xfered += xfered_len; |
1e3ff5ad AC |
1714 | QUIT; |
1715 | } | |
1716 | return len; | |
1717 | } | |
1718 | ||
7f79c47e DE |
1719 | /* For docs on target_write see target.h. */ |
1720 | ||
cf7a04e8 DJ |
1721 | LONGEST |
1722 | target_write (struct target_ops *ops, | |
1723 | enum target_object object, | |
1724 | const char *annex, const gdb_byte *buf, | |
1725 | ULONGEST offset, LONGEST len) | |
1726 | { | |
1727 | return target_write_with_progress (ops, object, annex, buf, offset, len, | |
1728 | NULL, NULL); | |
1729 | } | |
1730 | ||
159f81f3 DJ |
1731 | /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return |
1732 | the size of the transferred data. PADDING additional bytes are | |
1733 | available in *BUF_P. This is a helper function for | |
1734 | target_read_alloc; see the declaration of that function for more | |
1735 | information. */ | |
13547ab6 | 1736 | |
159f81f3 DJ |
1737 | static LONGEST |
1738 | target_read_alloc_1 (struct target_ops *ops, enum target_object object, | |
1739 | const char *annex, gdb_byte **buf_p, int padding) | |
13547ab6 DJ |
1740 | { |
1741 | size_t buf_alloc, buf_pos; | |
1742 | gdb_byte *buf; | |
13547ab6 DJ |
1743 | |
1744 | /* This function does not have a length parameter; it reads the | |
1745 | entire OBJECT). Also, it doesn't support objects fetched partly | |
1746 | from one target and partly from another (in a different stratum, | |
1747 | e.g. a core file and an executable). Both reasons make it | |
1748 | unsuitable for reading memory. */ | |
1749 | gdb_assert (object != TARGET_OBJECT_MEMORY); | |
1750 | ||
1751 | /* Start by reading up to 4K at a time. The target will throttle | |
1752 | this number down if necessary. */ | |
1753 | buf_alloc = 4096; | |
1754 | buf = xmalloc (buf_alloc); | |
1755 | buf_pos = 0; | |
1756 | while (1) | |
1757 | { | |
9b409511 YQ |
1758 | ULONGEST xfered_len; |
1759 | enum target_xfer_status status; | |
1760 | ||
1761 | status = target_read_partial (ops, object, annex, &buf[buf_pos], | |
1762 | buf_pos, buf_alloc - buf_pos - padding, | |
1763 | &xfered_len); | |
1764 | ||
1765 | if (status == TARGET_XFER_EOF) | |
13547ab6 DJ |
1766 | { |
1767 | /* Read all there was. */ | |
1768 | if (buf_pos == 0) | |
1769 | xfree (buf); | |
1770 | else | |
1771 | *buf_p = buf; | |
1772 | return buf_pos; | |
1773 | } | |
9b409511 YQ |
1774 | else if (status != TARGET_XFER_OK) |
1775 | { | |
1776 | /* An error occurred. */ | |
1777 | xfree (buf); | |
1778 | return TARGET_XFER_E_IO; | |
1779 | } | |
13547ab6 | 1780 | |
9b409511 | 1781 | buf_pos += xfered_len; |
13547ab6 DJ |
1782 | |
1783 | /* If the buffer is filling up, expand it. */ | |
1784 | if (buf_alloc < buf_pos * 2) | |
1785 | { | |
1786 | buf_alloc *= 2; | |
1787 | buf = xrealloc (buf, buf_alloc); | |
1788 | } | |
1789 | ||
1790 | QUIT; | |
1791 | } | |
1792 | } | |
1793 | ||
159f81f3 DJ |
1794 | /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return |
1795 | the size of the transferred data. See the declaration in "target.h" | |
1796 | function for more information about the return value. */ | |
1797 | ||
1798 | LONGEST | |
1799 | target_read_alloc (struct target_ops *ops, enum target_object object, | |
1800 | const char *annex, gdb_byte **buf_p) | |
1801 | { | |
1802 | return target_read_alloc_1 (ops, object, annex, buf_p, 0); | |
1803 | } | |
1804 | ||
1805 | /* Read OBJECT/ANNEX using OPS. The result is NUL-terminated and | |
1806 | returned as a string, allocated using xmalloc. If an error occurs | |
1807 | or the transfer is unsupported, NULL is returned. Empty objects | |
1808 | are returned as allocated but empty strings. A warning is issued | |
1809 | if the result contains any embedded NUL bytes. */ | |
1810 | ||
1811 | char * | |
1812 | target_read_stralloc (struct target_ops *ops, enum target_object object, | |
1813 | const char *annex) | |
1814 | { | |
39086a0e PA |
1815 | gdb_byte *buffer; |
1816 | char *bufstr; | |
7313baad | 1817 | LONGEST i, transferred; |
159f81f3 | 1818 | |
39086a0e PA |
1819 | transferred = target_read_alloc_1 (ops, object, annex, &buffer, 1); |
1820 | bufstr = (char *) buffer; | |
159f81f3 DJ |
1821 | |
1822 | if (transferred < 0) | |
1823 | return NULL; | |
1824 | ||
1825 | if (transferred == 0) | |
1826 | return xstrdup (""); | |
1827 | ||
39086a0e | 1828 | bufstr[transferred] = 0; |
7313baad UW |
1829 | |
1830 | /* Check for embedded NUL bytes; but allow trailing NULs. */ | |
39086a0e PA |
1831 | for (i = strlen (bufstr); i < transferred; i++) |
1832 | if (bufstr[i] != 0) | |
7313baad UW |
1833 | { |
1834 | warning (_("target object %d, annex %s, " | |
1835 | "contained unexpected null characters"), | |
1836 | (int) object, annex ? annex : "(none)"); | |
1837 | break; | |
1838 | } | |
159f81f3 | 1839 | |
39086a0e | 1840 | return bufstr; |
159f81f3 DJ |
1841 | } |
1842 | ||
b6591e8b AC |
1843 | /* Memory transfer methods. */ |
1844 | ||
1845 | void | |
1b0ba102 | 1846 | get_target_memory (struct target_ops *ops, CORE_ADDR addr, gdb_byte *buf, |
b6591e8b AC |
1847 | LONGEST len) |
1848 | { | |
07b82ea5 PA |
1849 | /* This method is used to read from an alternate, non-current |
1850 | target. This read must bypass the overlay support (as symbols | |
1851 | don't match this target), and GDB's internal cache (wrong cache | |
1852 | for this target). */ | |
1853 | if (target_read (ops, TARGET_OBJECT_RAW_MEMORY, NULL, buf, addr, len) | |
b6591e8b | 1854 | != len) |
578d3588 | 1855 | memory_error (TARGET_XFER_E_IO, addr); |
b6591e8b AC |
1856 | } |
1857 | ||
1858 | ULONGEST | |
5d502164 MS |
1859 | get_target_memory_unsigned (struct target_ops *ops, CORE_ADDR addr, |
1860 | int len, enum bfd_endian byte_order) | |
b6591e8b | 1861 | { |
f6519ebc | 1862 | gdb_byte buf[sizeof (ULONGEST)]; |
b6591e8b AC |
1863 | |
1864 | gdb_assert (len <= sizeof (buf)); | |
1865 | get_target_memory (ops, addr, buf, len); | |
e17a4113 | 1866 | return extract_unsigned_integer (buf, len, byte_order); |
b6591e8b AC |
1867 | } |
1868 | ||
3db08215 MM |
1869 | /* See target.h. */ |
1870 | ||
d914c394 SS |
1871 | int |
1872 | target_insert_breakpoint (struct gdbarch *gdbarch, | |
1873 | struct bp_target_info *bp_tgt) | |
1874 | { | |
1875 | if (!may_insert_breakpoints) | |
1876 | { | |
1877 | warning (_("May not insert breakpoints")); | |
1878 | return 1; | |
1879 | } | |
1880 | ||
6b84065d TT |
1881 | return current_target.to_insert_breakpoint (¤t_target, |
1882 | gdbarch, bp_tgt); | |
d914c394 SS |
1883 | } |
1884 | ||
3db08215 MM |
1885 | /* See target.h. */ |
1886 | ||
d914c394 | 1887 | int |
6b84065d TT |
1888 | target_remove_breakpoint (struct gdbarch *gdbarch, |
1889 | struct bp_target_info *bp_tgt) | |
d914c394 SS |
1890 | { |
1891 | /* This is kind of a weird case to handle, but the permission might | |
1892 | have been changed after breakpoints were inserted - in which case | |
1893 | we should just take the user literally and assume that any | |
1894 | breakpoints should be left in place. */ | |
1895 | if (!may_insert_breakpoints) | |
1896 | { | |
1897 | warning (_("May not remove breakpoints")); | |
1898 | return 1; | |
1899 | } | |
1900 | ||
6b84065d TT |
1901 | return current_target.to_remove_breakpoint (¤t_target, |
1902 | gdbarch, bp_tgt); | |
d914c394 SS |
1903 | } |
1904 | ||
c906108c | 1905 | static void |
fba45db2 | 1906 | target_info (char *args, int from_tty) |
c906108c SS |
1907 | { |
1908 | struct target_ops *t; | |
c906108c | 1909 | int has_all_mem = 0; |
c5aa993b | 1910 | |
c906108c | 1911 | if (symfile_objfile != NULL) |
4262abfb JK |
1912 | printf_unfiltered (_("Symbols from \"%s\".\n"), |
1913 | objfile_name (symfile_objfile)); | |
c906108c | 1914 | |
258b763a | 1915 | for (t = target_stack; t != NULL; t = t->beneath) |
c906108c | 1916 | { |
c35b1492 | 1917 | if (!(*t->to_has_memory) (t)) |
c906108c SS |
1918 | continue; |
1919 | ||
c5aa993b | 1920 | if ((int) (t->to_stratum) <= (int) dummy_stratum) |
c906108c SS |
1921 | continue; |
1922 | if (has_all_mem) | |
3e43a32a MS |
1923 | printf_unfiltered (_("\tWhile running this, " |
1924 | "GDB does not access memory from...\n")); | |
c5aa993b JM |
1925 | printf_unfiltered ("%s:\n", t->to_longname); |
1926 | (t->to_files_info) (t); | |
c35b1492 | 1927 | has_all_mem = (*t->to_has_all_memory) (t); |
c906108c SS |
1928 | } |
1929 | } | |
1930 | ||
fd79ecee DJ |
1931 | /* This function is called before any new inferior is created, e.g. |
1932 | by running a program, attaching, or connecting to a target. | |
1933 | It cleans up any state from previous invocations which might | |
1934 | change between runs. This is a subset of what target_preopen | |
1935 | resets (things which might change between targets). */ | |
1936 | ||
1937 | void | |
1938 | target_pre_inferior (int from_tty) | |
1939 | { | |
c378eb4e | 1940 | /* Clear out solib state. Otherwise the solib state of the previous |
b9db4ced | 1941 | inferior might have survived and is entirely wrong for the new |
c378eb4e | 1942 | target. This has been observed on GNU/Linux using glibc 2.3. How |
b9db4ced UW |
1943 | to reproduce: |
1944 | ||
1945 | bash$ ./foo& | |
1946 | [1] 4711 | |
1947 | bash$ ./foo& | |
1948 | [1] 4712 | |
1949 | bash$ gdb ./foo | |
1950 | [...] | |
1951 | (gdb) attach 4711 | |
1952 | (gdb) detach | |
1953 | (gdb) attach 4712 | |
1954 | Cannot access memory at address 0xdeadbeef | |
1955 | */ | |
b9db4ced | 1956 | |
50c71eaf PA |
1957 | /* In some OSs, the shared library list is the same/global/shared |
1958 | across inferiors. If code is shared between processes, so are | |
1959 | memory regions and features. */ | |
f5656ead | 1960 | if (!gdbarch_has_global_solist (target_gdbarch ())) |
50c71eaf PA |
1961 | { |
1962 | no_shared_libraries (NULL, from_tty); | |
1963 | ||
1964 | invalidate_target_mem_regions (); | |
424163ea | 1965 | |
50c71eaf PA |
1966 | target_clear_description (); |
1967 | } | |
8ffcbaaf YQ |
1968 | |
1969 | agent_capability_invalidate (); | |
fd79ecee DJ |
1970 | } |
1971 | ||
b8fa0bfa PA |
1972 | /* Callback for iterate_over_inferiors. Gets rid of the given |
1973 | inferior. */ | |
1974 | ||
1975 | static int | |
1976 | dispose_inferior (struct inferior *inf, void *args) | |
1977 | { | |
1978 | struct thread_info *thread; | |
1979 | ||
1980 | thread = any_thread_of_process (inf->pid); | |
1981 | if (thread) | |
1982 | { | |
1983 | switch_to_thread (thread->ptid); | |
1984 | ||
1985 | /* Core inferiors actually should be detached, not killed. */ | |
1986 | if (target_has_execution) | |
1987 | target_kill (); | |
1988 | else | |
1989 | target_detach (NULL, 0); | |
1990 | } | |
1991 | ||
1992 | return 0; | |
1993 | } | |
1994 | ||
c906108c SS |
1995 | /* This is to be called by the open routine before it does |
1996 | anything. */ | |
1997 | ||
1998 | void | |
fba45db2 | 1999 | target_preopen (int from_tty) |
c906108c | 2000 | { |
c5aa993b | 2001 | dont_repeat (); |
c906108c | 2002 | |
b8fa0bfa | 2003 | if (have_inferiors ()) |
c5aa993b | 2004 | { |
adf40b2e | 2005 | if (!from_tty |
b8fa0bfa PA |
2006 | || !have_live_inferiors () |
2007 | || query (_("A program is being debugged already. Kill it? "))) | |
2008 | iterate_over_inferiors (dispose_inferior, NULL); | |
c906108c | 2009 | else |
8a3fe4f8 | 2010 | error (_("Program not killed.")); |
c906108c SS |
2011 | } |
2012 | ||
2013 | /* Calling target_kill may remove the target from the stack. But if | |
2014 | it doesn't (which seems like a win for UDI), remove it now. */ | |
87ab71f0 PA |
2015 | /* Leave the exec target, though. The user may be switching from a |
2016 | live process to a core of the same program. */ | |
460014f5 | 2017 | pop_all_targets_above (file_stratum); |
fd79ecee DJ |
2018 | |
2019 | target_pre_inferior (from_tty); | |
c906108c SS |
2020 | } |
2021 | ||
2022 | /* Detach a target after doing deferred register stores. */ | |
2023 | ||
2024 | void | |
52554a0e | 2025 | target_detach (const char *args, int from_tty) |
c906108c | 2026 | { |
136d6dae VP |
2027 | struct target_ops* t; |
2028 | ||
f5656ead | 2029 | if (gdbarch_has_global_breakpoints (target_gdbarch ())) |
50c71eaf PA |
2030 | /* Don't remove global breakpoints here. They're removed on |
2031 | disconnection from the target. */ | |
2032 | ; | |
2033 | else | |
2034 | /* If we're in breakpoints-always-inserted mode, have to remove | |
2035 | them before detaching. */ | |
dfd4cc63 | 2036 | remove_breakpoints_pid (ptid_get_pid (inferior_ptid)); |
74960c60 | 2037 | |
24291992 PA |
2038 | prepare_for_detach (); |
2039 | ||
09da0d0a | 2040 | current_target.to_detach (¤t_target, args, from_tty); |
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 | ||
86a0854a | 2051 | current_target.to_disconnect (¤t_target, args, from_tty); |
6ad8ae5c DJ |
2052 | } |
2053 | ||
117de6a9 | 2054 | ptid_t |
47608cb1 | 2055 | target_wait (ptid_t ptid, struct target_waitstatus *status, int options) |
117de6a9 | 2056 | { |
a7068b60 | 2057 | return (current_target.to_wait) (¤t_target, ptid, status, options); |
117de6a9 PA |
2058 | } |
2059 | ||
2060 | char * | |
2061 | target_pid_to_str (ptid_t ptid) | |
2062 | { | |
770234d3 | 2063 | return (*current_target.to_pid_to_str) (¤t_target, ptid); |
117de6a9 PA |
2064 | } |
2065 | ||
4694da01 TT |
2066 | char * |
2067 | target_thread_name (struct thread_info *info) | |
2068 | { | |
825828fc | 2069 | return current_target.to_thread_name (¤t_target, info); |
4694da01 TT |
2070 | } |
2071 | ||
e1ac3328 | 2072 | void |
2ea28649 | 2073 | target_resume (ptid_t ptid, int step, enum gdb_signal signal) |
e1ac3328 | 2074 | { |
28439f5e PA |
2075 | struct target_ops *t; |
2076 | ||
4e5d721f | 2077 | target_dcache_invalidate (); |
28439f5e | 2078 | |
6b84065d | 2079 | current_target.to_resume (¤t_target, ptid, step, signal); |
28439f5e | 2080 | |
6b84065d | 2081 | registers_changed_ptid (ptid); |
251bde03 PA |
2082 | /* We only set the internal executing state here. The user/frontend |
2083 | running state is set at a higher level. */ | |
6b84065d | 2084 | set_executing (ptid, 1); |
6b84065d | 2085 | clear_inline_frame_state (ptid); |
e1ac3328 | 2086 | } |
2455069d UW |
2087 | |
2088 | void | |
2089 | target_pass_signals (int numsigs, unsigned char *pass_signals) | |
2090 | { | |
035cad7f | 2091 | (*current_target.to_pass_signals) (¤t_target, numsigs, pass_signals); |
2455069d UW |
2092 | } |
2093 | ||
9b224c5e PA |
2094 | void |
2095 | target_program_signals (int numsigs, unsigned char *program_signals) | |
2096 | { | |
7d4f8efa TT |
2097 | (*current_target.to_program_signals) (¤t_target, |
2098 | numsigs, program_signals); | |
9b224c5e PA |
2099 | } |
2100 | ||
098dba18 TT |
2101 | static int |
2102 | default_follow_fork (struct target_ops *self, int follow_child, | |
2103 | int detach_fork) | |
2104 | { | |
2105 | /* Some target returned a fork event, but did not know how to follow it. */ | |
2106 | internal_error (__FILE__, __LINE__, | |
2107 | _("could not find a target to follow fork")); | |
2108 | } | |
2109 | ||
ee057212 DJ |
2110 | /* Look through the list of possible targets for a target that can |
2111 | follow forks. */ | |
2112 | ||
2113 | int | |
07107ca6 | 2114 | target_follow_fork (int follow_child, int detach_fork) |
ee057212 | 2115 | { |
a7068b60 TT |
2116 | return current_target.to_follow_fork (¤t_target, |
2117 | follow_child, detach_fork); | |
ee057212 DJ |
2118 | } |
2119 | ||
8d657035 TT |
2120 | static void |
2121 | default_mourn_inferior (struct target_ops *self) | |
2122 | { | |
2123 | internal_error (__FILE__, __LINE__, | |
2124 | _("could not find a target to follow mourn inferior")); | |
2125 | } | |
2126 | ||
136d6dae VP |
2127 | void |
2128 | target_mourn_inferior (void) | |
2129 | { | |
8d657035 | 2130 | current_target.to_mourn_inferior (¤t_target); |
136d6dae | 2131 | |
8d657035 TT |
2132 | /* We no longer need to keep handles on any of the object files. |
2133 | Make sure to release them to avoid unnecessarily locking any | |
2134 | of them while we're not actually debugging. */ | |
2135 | bfd_cache_close_all (); | |
136d6dae VP |
2136 | } |
2137 | ||
424163ea DJ |
2138 | /* Look for a target which can describe architectural features, starting |
2139 | from TARGET. If we find one, return its description. */ | |
2140 | ||
2141 | const struct target_desc * | |
2142 | target_read_description (struct target_ops *target) | |
2143 | { | |
2117c711 | 2144 | return target->to_read_description (target); |
424163ea DJ |
2145 | } |
2146 | ||
58a5184e | 2147 | /* This implements a basic search of memory, reading target memory and |
08388c79 DE |
2148 | performing the search here (as opposed to performing the search in on the |
2149 | target side with, for example, gdbserver). */ | |
2150 | ||
2151 | int | |
2152 | simple_search_memory (struct target_ops *ops, | |
2153 | CORE_ADDR start_addr, ULONGEST search_space_len, | |
2154 | const gdb_byte *pattern, ULONGEST pattern_len, | |
2155 | CORE_ADDR *found_addrp) | |
2156 | { | |
2157 | /* NOTE: also defined in find.c testcase. */ | |
2158 | #define SEARCH_CHUNK_SIZE 16000 | |
2159 | const unsigned chunk_size = SEARCH_CHUNK_SIZE; | |
2160 | /* Buffer to hold memory contents for searching. */ | |
2161 | gdb_byte *search_buf; | |
2162 | unsigned search_buf_size; | |
2163 | struct cleanup *old_cleanups; | |
2164 | ||
2165 | search_buf_size = chunk_size + pattern_len - 1; | |
2166 | ||
2167 | /* No point in trying to allocate a buffer larger than the search space. */ | |
2168 | if (search_space_len < search_buf_size) | |
2169 | search_buf_size = search_space_len; | |
2170 | ||
2171 | search_buf = malloc (search_buf_size); | |
2172 | if (search_buf == NULL) | |
5e1471f5 | 2173 | error (_("Unable to allocate memory to perform the search.")); |
08388c79 DE |
2174 | old_cleanups = make_cleanup (free_current_contents, &search_buf); |
2175 | ||
2176 | /* Prime the search buffer. */ | |
2177 | ||
2178 | if (target_read (ops, TARGET_OBJECT_MEMORY, NULL, | |
2179 | search_buf, start_addr, search_buf_size) != search_buf_size) | |
2180 | { | |
b3dc46ff AB |
2181 | warning (_("Unable to access %s bytes of target " |
2182 | "memory at %s, halting search."), | |
2183 | pulongest (search_buf_size), hex_string (start_addr)); | |
08388c79 DE |
2184 | do_cleanups (old_cleanups); |
2185 | return -1; | |
2186 | } | |
2187 | ||
2188 | /* Perform the search. | |
2189 | ||
2190 | The loop is kept simple by allocating [N + pattern-length - 1] bytes. | |
2191 | When we've scanned N bytes we copy the trailing bytes to the start and | |
2192 | read in another N bytes. */ | |
2193 | ||
2194 | while (search_space_len >= pattern_len) | |
2195 | { | |
2196 | gdb_byte *found_ptr; | |
2197 | unsigned nr_search_bytes = min (search_space_len, search_buf_size); | |
2198 | ||
2199 | found_ptr = memmem (search_buf, nr_search_bytes, | |
2200 | pattern, pattern_len); | |
2201 | ||
2202 | if (found_ptr != NULL) | |
2203 | { | |
2204 | CORE_ADDR found_addr = start_addr + (found_ptr - search_buf); | |
5d502164 | 2205 | |
08388c79 DE |
2206 | *found_addrp = found_addr; |
2207 | do_cleanups (old_cleanups); | |
2208 | return 1; | |
2209 | } | |
2210 | ||
2211 | /* Not found in this chunk, skip to next chunk. */ | |
2212 | ||
2213 | /* Don't let search_space_len wrap here, it's unsigned. */ | |
2214 | if (search_space_len >= chunk_size) | |
2215 | search_space_len -= chunk_size; | |
2216 | else | |
2217 | search_space_len = 0; | |
2218 | ||
2219 | if (search_space_len >= pattern_len) | |
2220 | { | |
2221 | unsigned keep_len = search_buf_size - chunk_size; | |
8a35fb51 | 2222 | CORE_ADDR read_addr = start_addr + chunk_size + keep_len; |
08388c79 DE |
2223 | int nr_to_read; |
2224 | ||
2225 | /* Copy the trailing part of the previous iteration to the front | |
2226 | of the buffer for the next iteration. */ | |
2227 | gdb_assert (keep_len == pattern_len - 1); | |
2228 | memcpy (search_buf, search_buf + chunk_size, keep_len); | |
2229 | ||
2230 | nr_to_read = min (search_space_len - keep_len, chunk_size); | |
2231 | ||
2232 | if (target_read (ops, TARGET_OBJECT_MEMORY, NULL, | |
2233 | search_buf + keep_len, read_addr, | |
2234 | nr_to_read) != nr_to_read) | |
2235 | { | |
b3dc46ff | 2236 | warning (_("Unable to access %s bytes of target " |
9b20d036 | 2237 | "memory at %s, halting search."), |
b3dc46ff | 2238 | plongest (nr_to_read), |
08388c79 DE |
2239 | hex_string (read_addr)); |
2240 | do_cleanups (old_cleanups); | |
2241 | return -1; | |
2242 | } | |
2243 | ||
2244 | start_addr += chunk_size; | |
2245 | } | |
2246 | } | |
2247 | ||
2248 | /* Not found. */ | |
2249 | ||
2250 | do_cleanups (old_cleanups); | |
2251 | return 0; | |
2252 | } | |
2253 | ||
58a5184e TT |
2254 | /* Default implementation of memory-searching. */ |
2255 | ||
2256 | static int | |
2257 | default_search_memory (struct target_ops *self, | |
2258 | CORE_ADDR start_addr, ULONGEST search_space_len, | |
2259 | const gdb_byte *pattern, ULONGEST pattern_len, | |
2260 | CORE_ADDR *found_addrp) | |
2261 | { | |
2262 | /* Start over from the top of the target stack. */ | |
2263 | return simple_search_memory (current_target.beneath, | |
2264 | start_addr, search_space_len, | |
2265 | pattern, pattern_len, found_addrp); | |
2266 | } | |
2267 | ||
08388c79 DE |
2268 | /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the |
2269 | sequence of bytes in PATTERN with length PATTERN_LEN. | |
2270 | ||
2271 | The result is 1 if found, 0 if not found, and -1 if there was an error | |
2272 | requiring halting of the search (e.g. memory read error). | |
2273 | If the pattern is found the address is recorded in FOUND_ADDRP. */ | |
2274 | ||
2275 | int | |
2276 | target_search_memory (CORE_ADDR start_addr, ULONGEST search_space_len, | |
2277 | const gdb_byte *pattern, ULONGEST pattern_len, | |
2278 | CORE_ADDR *found_addrp) | |
2279 | { | |
a7068b60 TT |
2280 | return current_target.to_search_memory (¤t_target, start_addr, |
2281 | search_space_len, | |
2282 | pattern, pattern_len, found_addrp); | |
08388c79 DE |
2283 | } |
2284 | ||
8edfe269 DJ |
2285 | /* Look through the currently pushed targets. If none of them will |
2286 | be able to restart the currently running process, issue an error | |
2287 | message. */ | |
2288 | ||
2289 | void | |
2290 | target_require_runnable (void) | |
2291 | { | |
2292 | struct target_ops *t; | |
2293 | ||
2294 | for (t = target_stack; t != NULL; t = t->beneath) | |
2295 | { | |
2296 | /* If this target knows how to create a new program, then | |
2297 | assume we will still be able to after killing the current | |
2298 | one. Either killing and mourning will not pop T, or else | |
2299 | find_default_run_target will find it again. */ | |
2300 | if (t->to_create_inferior != NULL) | |
2301 | return; | |
2302 | ||
548740d6 | 2303 | /* Do not worry about targets at certain strata that can not |
8edfe269 DJ |
2304 | create inferiors. Assume they will be pushed again if |
2305 | necessary, and continue to the process_stratum. */ | |
85e747d2 | 2306 | if (t->to_stratum == thread_stratum |
548740d6 | 2307 | || t->to_stratum == record_stratum |
85e747d2 | 2308 | || t->to_stratum == arch_stratum) |
8edfe269 DJ |
2309 | continue; |
2310 | ||
3e43a32a MS |
2311 | error (_("The \"%s\" target does not support \"run\". " |
2312 | "Try \"help target\" or \"continue\"."), | |
8edfe269 DJ |
2313 | t->to_shortname); |
2314 | } | |
2315 | ||
2316 | /* This function is only called if the target is running. In that | |
2317 | case there should have been a process_stratum target and it | |
c378eb4e | 2318 | should either know how to create inferiors, or not... */ |
9b20d036 | 2319 | internal_error (__FILE__, __LINE__, _("No targets found")); |
8edfe269 DJ |
2320 | } |
2321 | ||
6a3cb8e8 PA |
2322 | /* Whether GDB is allowed to fall back to the default run target for |
2323 | "run", "attach", etc. when no target is connected yet. */ | |
2324 | static int auto_connect_native_target = 1; | |
2325 | ||
2326 | static void | |
2327 | show_auto_connect_native_target (struct ui_file *file, int from_tty, | |
2328 | struct cmd_list_element *c, const char *value) | |
2329 | { | |
2330 | fprintf_filtered (file, | |
2331 | _("Whether GDB may automatically connect to the " | |
2332 | "native target is %s.\n"), | |
2333 | value); | |
2334 | } | |
2335 | ||
c906108c SS |
2336 | /* Look through the list of possible targets for a target that can |
2337 | execute a run or attach command without any other data. This is | |
2338 | used to locate the default process stratum. | |
2339 | ||
5f667f2d PA |
2340 | If DO_MESG is not NULL, the result is always valid (error() is |
2341 | called for errors); else, return NULL on error. */ | |
c906108c SS |
2342 | |
2343 | static struct target_ops * | |
fba45db2 | 2344 | find_default_run_target (char *do_mesg) |
c906108c | 2345 | { |
c906108c | 2346 | struct target_ops *runable = NULL; |
c906108c | 2347 | |
6a3cb8e8 | 2348 | if (auto_connect_native_target) |
c906108c | 2349 | { |
89a1c21a | 2350 | struct target_ops *t; |
6a3cb8e8 | 2351 | int count = 0; |
89a1c21a | 2352 | int i; |
6a3cb8e8 | 2353 | |
89a1c21a | 2354 | for (i = 0; VEC_iterate (target_ops_p, target_structs, i, t); ++i) |
c906108c | 2355 | { |
89a1c21a | 2356 | if (t->to_can_run != delegate_can_run && target_can_run (t)) |
6a3cb8e8 | 2357 | { |
89a1c21a | 2358 | runable = t; |
6a3cb8e8 PA |
2359 | ++count; |
2360 | } | |
c906108c | 2361 | } |
6a3cb8e8 PA |
2362 | |
2363 | if (count != 1) | |
2364 | runable = NULL; | |
c906108c SS |
2365 | } |
2366 | ||
6a3cb8e8 | 2367 | if (runable == NULL) |
5f667f2d PA |
2368 | { |
2369 | if (do_mesg) | |
2370 | error (_("Don't know how to %s. Try \"help target\"."), do_mesg); | |
2371 | else | |
2372 | return NULL; | |
2373 | } | |
c906108c SS |
2374 | |
2375 | return runable; | |
2376 | } | |
2377 | ||
b3ccfe11 | 2378 | /* See target.h. */ |
c906108c | 2379 | |
b3ccfe11 TT |
2380 | struct target_ops * |
2381 | find_attach_target (void) | |
c906108c SS |
2382 | { |
2383 | struct target_ops *t; | |
2384 | ||
b3ccfe11 TT |
2385 | /* If a target on the current stack can attach, use it. */ |
2386 | for (t = current_target.beneath; t != NULL; t = t->beneath) | |
2387 | { | |
2388 | if (t->to_attach != NULL) | |
2389 | break; | |
2390 | } | |
c906108c | 2391 | |
b3ccfe11 TT |
2392 | /* Otherwise, use the default run target for attaching. */ |
2393 | if (t == NULL) | |
2394 | t = find_default_run_target ("attach"); | |
b84876c2 | 2395 | |
b3ccfe11 | 2396 | return t; |
b84876c2 PA |
2397 | } |
2398 | ||
b3ccfe11 | 2399 | /* See target.h. */ |
b84876c2 | 2400 | |
b3ccfe11 TT |
2401 | struct target_ops * |
2402 | find_run_target (void) | |
9908b566 VP |
2403 | { |
2404 | struct target_ops *t; | |
2405 | ||
b3ccfe11 TT |
2406 | /* If a target on the current stack can attach, use it. */ |
2407 | for (t = current_target.beneath; t != NULL; t = t->beneath) | |
2408 | { | |
2409 | if (t->to_create_inferior != NULL) | |
2410 | break; | |
2411 | } | |
5d502164 | 2412 | |
b3ccfe11 TT |
2413 | /* Otherwise, use the default run target. */ |
2414 | if (t == NULL) | |
2415 | t = find_default_run_target ("run"); | |
9908b566 | 2416 | |
b3ccfe11 | 2417 | return t; |
9908b566 VP |
2418 | } |
2419 | ||
145b16a9 UW |
2420 | /* Implement the "info proc" command. */ |
2421 | ||
451b7c33 | 2422 | int |
7bc112c1 | 2423 | target_info_proc (const char *args, enum info_proc_what what) |
145b16a9 UW |
2424 | { |
2425 | struct target_ops *t; | |
2426 | ||
2427 | /* If we're already connected to something that can get us OS | |
2428 | related data, use it. Otherwise, try using the native | |
2429 | target. */ | |
2430 | if (current_target.to_stratum >= process_stratum) | |
2431 | t = current_target.beneath; | |
2432 | else | |
2433 | t = find_default_run_target (NULL); | |
2434 | ||
2435 | for (; t != NULL; t = t->beneath) | |
2436 | { | |
2437 | if (t->to_info_proc != NULL) | |
2438 | { | |
2439 | t->to_info_proc (t, args, what); | |
2440 | ||
2441 | if (targetdebug) | |
2442 | fprintf_unfiltered (gdb_stdlog, | |
2443 | "target_info_proc (\"%s\", %d)\n", args, what); | |
2444 | ||
451b7c33 | 2445 | return 1; |
145b16a9 UW |
2446 | } |
2447 | } | |
2448 | ||
451b7c33 | 2449 | return 0; |
145b16a9 UW |
2450 | } |
2451 | ||
03583c20 | 2452 | static int |
2bfc0540 | 2453 | find_default_supports_disable_randomization (struct target_ops *self) |
03583c20 UW |
2454 | { |
2455 | struct target_ops *t; | |
2456 | ||
2457 | t = find_default_run_target (NULL); | |
2458 | if (t && t->to_supports_disable_randomization) | |
2bfc0540 | 2459 | return (t->to_supports_disable_randomization) (t); |
03583c20 UW |
2460 | return 0; |
2461 | } | |
2462 | ||
2463 | int | |
2464 | target_supports_disable_randomization (void) | |
2465 | { | |
2466 | struct target_ops *t; | |
2467 | ||
2468 | for (t = ¤t_target; t != NULL; t = t->beneath) | |
2469 | if (t->to_supports_disable_randomization) | |
2bfc0540 | 2470 | return t->to_supports_disable_randomization (t); |
03583c20 UW |
2471 | |
2472 | return 0; | |
2473 | } | |
9908b566 | 2474 | |
07e059b5 VP |
2475 | char * |
2476 | target_get_osdata (const char *type) | |
2477 | { | |
07e059b5 VP |
2478 | struct target_ops *t; |
2479 | ||
739ef7fb PA |
2480 | /* If we're already connected to something that can get us OS |
2481 | related data, use it. Otherwise, try using the native | |
2482 | target. */ | |
2483 | if (current_target.to_stratum >= process_stratum) | |
6d097e65 | 2484 | t = current_target.beneath; |
739ef7fb PA |
2485 | else |
2486 | t = find_default_run_target ("get OS data"); | |
07e059b5 VP |
2487 | |
2488 | if (!t) | |
2489 | return NULL; | |
2490 | ||
6d097e65 | 2491 | return target_read_stralloc (t, TARGET_OBJECT_OSDATA, type); |
07e059b5 VP |
2492 | } |
2493 | ||
8eaff7cd TT |
2494 | static struct address_space * |
2495 | default_thread_address_space (struct target_ops *self, ptid_t ptid) | |
6c95b8df PA |
2496 | { |
2497 | struct inferior *inf; | |
6c95b8df PA |
2498 | |
2499 | /* Fall-back to the "main" address space of the inferior. */ | |
2500 | inf = find_inferior_pid (ptid_get_pid (ptid)); | |
2501 | ||
2502 | if (inf == NULL || inf->aspace == NULL) | |
3e43a32a | 2503 | internal_error (__FILE__, __LINE__, |
9b20d036 MS |
2504 | _("Can't determine the current " |
2505 | "address space of thread %s\n"), | |
6c95b8df PA |
2506 | target_pid_to_str (ptid)); |
2507 | ||
2508 | return inf->aspace; | |
2509 | } | |
2510 | ||
8eaff7cd TT |
2511 | /* Determine the current address space of thread PTID. */ |
2512 | ||
2513 | struct address_space * | |
2514 | target_thread_address_space (ptid_t ptid) | |
2515 | { | |
2516 | struct address_space *aspace; | |
2517 | ||
2518 | aspace = current_target.to_thread_address_space (¤t_target, ptid); | |
2519 | gdb_assert (aspace != NULL); | |
2520 | ||
8eaff7cd TT |
2521 | return aspace; |
2522 | } | |
2523 | ||
7313baad UW |
2524 | |
2525 | /* Target file operations. */ | |
2526 | ||
2527 | static struct target_ops * | |
2528 | default_fileio_target (void) | |
2529 | { | |
2530 | /* If we're already connected to something that can perform | |
2531 | file I/O, use it. Otherwise, try using the native target. */ | |
2532 | if (current_target.to_stratum >= process_stratum) | |
2533 | return current_target.beneath; | |
2534 | else | |
2535 | return find_default_run_target ("file I/O"); | |
2536 | } | |
2537 | ||
2538 | /* Open FILENAME on the target, using FLAGS and MODE. Return a | |
2539 | target file descriptor, or -1 if an error occurs (and set | |
2540 | *TARGET_ERRNO). */ | |
2541 | int | |
2542 | target_fileio_open (const char *filename, int flags, int mode, | |
2543 | int *target_errno) | |
2544 | { | |
2545 | struct target_ops *t; | |
2546 | ||
2547 | for (t = default_fileio_target (); t != NULL; t = t->beneath) | |
2548 | { | |
2549 | if (t->to_fileio_open != NULL) | |
2550 | { | |
cd897586 | 2551 | int fd = t->to_fileio_open (t, filename, flags, mode, target_errno); |
7313baad UW |
2552 | |
2553 | if (targetdebug) | |
2554 | fprintf_unfiltered (gdb_stdlog, | |
2555 | "target_fileio_open (%s,0x%x,0%o) = %d (%d)\n", | |
2556 | filename, flags, mode, | |
2557 | fd, fd != -1 ? 0 : *target_errno); | |
2558 | return fd; | |
2559 | } | |
2560 | } | |
2561 | ||
2562 | *target_errno = FILEIO_ENOSYS; | |
2563 | return -1; | |
2564 | } | |
2565 | ||
2566 | /* Write up to LEN bytes from WRITE_BUF to FD on the target. | |
2567 | Return the number of bytes written, or -1 if an error occurs | |
2568 | (and set *TARGET_ERRNO). */ | |
2569 | int | |
2570 | target_fileio_pwrite (int fd, const gdb_byte *write_buf, int len, | |
2571 | ULONGEST offset, int *target_errno) | |
2572 | { | |
2573 | struct target_ops *t; | |
2574 | ||
2575 | for (t = default_fileio_target (); t != NULL; t = t->beneath) | |
2576 | { | |
2577 | if (t->to_fileio_pwrite != NULL) | |
2578 | { | |
0d866f62 | 2579 | int ret = t->to_fileio_pwrite (t, fd, write_buf, len, offset, |
7313baad UW |
2580 | target_errno); |
2581 | ||
2582 | if (targetdebug) | |
2583 | fprintf_unfiltered (gdb_stdlog, | |
a71b5a38 | 2584 | "target_fileio_pwrite (%d,...,%d,%s) " |
7313baad | 2585 | "= %d (%d)\n", |
a71b5a38 | 2586 | fd, len, pulongest (offset), |
7313baad UW |
2587 | ret, ret != -1 ? 0 : *target_errno); |
2588 | return ret; | |
2589 | } | |
2590 | } | |
2591 | ||
2592 | *target_errno = FILEIO_ENOSYS; | |
2593 | return -1; | |
2594 | } | |
2595 | ||
2596 | /* Read up to LEN bytes FD on the target into READ_BUF. | |
2597 | Return the number of bytes read, or -1 if an error occurs | |
2598 | (and set *TARGET_ERRNO). */ | |
2599 | int | |
2600 | target_fileio_pread (int fd, gdb_byte *read_buf, int len, | |
2601 | ULONGEST offset, int *target_errno) | |
2602 | { | |
2603 | struct target_ops *t; | |
2604 | ||
2605 | for (t = default_fileio_target (); t != NULL; t = t->beneath) | |
2606 | { | |
2607 | if (t->to_fileio_pread != NULL) | |
2608 | { | |
a3be983c | 2609 | int ret = t->to_fileio_pread (t, fd, read_buf, len, offset, |
7313baad UW |
2610 | target_errno); |
2611 | ||
2612 | if (targetdebug) | |
2613 | fprintf_unfiltered (gdb_stdlog, | |
a71b5a38 | 2614 | "target_fileio_pread (%d,...,%d,%s) " |
7313baad | 2615 | "= %d (%d)\n", |
a71b5a38 | 2616 | fd, len, pulongest (offset), |
7313baad UW |
2617 | ret, ret != -1 ? 0 : *target_errno); |
2618 | return ret; | |
2619 | } | |
2620 | } | |
2621 | ||
2622 | *target_errno = FILEIO_ENOSYS; | |
2623 | return -1; | |
2624 | } | |
2625 | ||
2626 | /* Close FD on the target. Return 0, or -1 if an error occurs | |
2627 | (and set *TARGET_ERRNO). */ | |
2628 | int | |
2629 | target_fileio_close (int fd, int *target_errno) | |
2630 | { | |
2631 | struct target_ops *t; | |
2632 | ||
2633 | for (t = default_fileio_target (); t != NULL; t = t->beneath) | |
2634 | { | |
2635 | if (t->to_fileio_close != NULL) | |
2636 | { | |
df39ea25 | 2637 | int ret = t->to_fileio_close (t, fd, target_errno); |
7313baad UW |
2638 | |
2639 | if (targetdebug) | |
2640 | fprintf_unfiltered (gdb_stdlog, | |
2641 | "target_fileio_close (%d) = %d (%d)\n", | |
2642 | fd, ret, ret != -1 ? 0 : *target_errno); | |
2643 | return ret; | |
2644 | } | |
2645 | } | |
2646 | ||
2647 | *target_errno = FILEIO_ENOSYS; | |
2648 | return -1; | |
2649 | } | |
2650 | ||
2651 | /* Unlink FILENAME on the target. Return 0, or -1 if an error | |
2652 | occurs (and set *TARGET_ERRNO). */ | |
2653 | int | |
2654 | target_fileio_unlink (const char *filename, int *target_errno) | |
2655 | { | |
2656 | struct target_ops *t; | |
2657 | ||
2658 | for (t = default_fileio_target (); t != NULL; t = t->beneath) | |
2659 | { | |
2660 | if (t->to_fileio_unlink != NULL) | |
2661 | { | |
dbbca37d | 2662 | int ret = t->to_fileio_unlink (t, filename, target_errno); |
7313baad UW |
2663 | |
2664 | if (targetdebug) | |
2665 | fprintf_unfiltered (gdb_stdlog, | |
2666 | "target_fileio_unlink (%s) = %d (%d)\n", | |
2667 | filename, ret, ret != -1 ? 0 : *target_errno); | |
2668 | return ret; | |
2669 | } | |
2670 | } | |
2671 | ||
2672 | *target_errno = FILEIO_ENOSYS; | |
2673 | return -1; | |
2674 | } | |
2675 | ||
b9e7b9c3 UW |
2676 | /* Read value of symbolic link FILENAME on the target. Return a |
2677 | null-terminated string allocated via xmalloc, or NULL if an error | |
2678 | occurs (and set *TARGET_ERRNO). */ | |
2679 | char * | |
2680 | target_fileio_readlink (const char *filename, int *target_errno) | |
2681 | { | |
2682 | struct target_ops *t; | |
2683 | ||
2684 | for (t = default_fileio_target (); t != NULL; t = t->beneath) | |
2685 | { | |
2686 | if (t->to_fileio_readlink != NULL) | |
2687 | { | |
fab5aa7c | 2688 | char *ret = t->to_fileio_readlink (t, filename, target_errno); |
b9e7b9c3 UW |
2689 | |
2690 | if (targetdebug) | |
2691 | fprintf_unfiltered (gdb_stdlog, | |
2692 | "target_fileio_readlink (%s) = %s (%d)\n", | |
2693 | filename, ret? ret : "(nil)", | |
2694 | ret? 0 : *target_errno); | |
2695 | return ret; | |
2696 | } | |
2697 | } | |
2698 | ||
2699 | *target_errno = FILEIO_ENOSYS; | |
2700 | return NULL; | |
2701 | } | |
2702 | ||
7313baad UW |
2703 | static void |
2704 | target_fileio_close_cleanup (void *opaque) | |
2705 | { | |
2706 | int fd = *(int *) opaque; | |
2707 | int target_errno; | |
2708 | ||
2709 | target_fileio_close (fd, &target_errno); | |
2710 | } | |
2711 | ||
2712 | /* Read target file FILENAME. Store the result in *BUF_P and | |
2713 | return the size of the transferred data. PADDING additional bytes are | |
2714 | available in *BUF_P. This is a helper function for | |
2715 | target_fileio_read_alloc; see the declaration of that function for more | |
2716 | information. */ | |
2717 | ||
2718 | static LONGEST | |
2719 | target_fileio_read_alloc_1 (const char *filename, | |
2720 | gdb_byte **buf_p, int padding) | |
2721 | { | |
2722 | struct cleanup *close_cleanup; | |
2723 | size_t buf_alloc, buf_pos; | |
2724 | gdb_byte *buf; | |
2725 | LONGEST n; | |
2726 | int fd; | |
2727 | int target_errno; | |
2728 | ||
2729 | fd = target_fileio_open (filename, FILEIO_O_RDONLY, 0700, &target_errno); | |
2730 | if (fd == -1) | |
2731 | return -1; | |
2732 | ||
2733 | close_cleanup = make_cleanup (target_fileio_close_cleanup, &fd); | |
2734 | ||
2735 | /* Start by reading up to 4K at a time. The target will throttle | |
2736 | this number down if necessary. */ | |
2737 | buf_alloc = 4096; | |
2738 | buf = xmalloc (buf_alloc); | |
2739 | buf_pos = 0; | |
2740 | while (1) | |
2741 | { | |
2742 | n = target_fileio_pread (fd, &buf[buf_pos], | |
2743 | buf_alloc - buf_pos - padding, buf_pos, | |
2744 | &target_errno); | |
2745 | if (n < 0) | |
2746 | { | |
2747 | /* An error occurred. */ | |
2748 | do_cleanups (close_cleanup); | |
2749 | xfree (buf); | |
2750 | return -1; | |
2751 | } | |
2752 | else if (n == 0) | |
2753 | { | |
2754 | /* Read all there was. */ | |
2755 | do_cleanups (close_cleanup); | |
2756 | if (buf_pos == 0) | |
2757 | xfree (buf); | |
2758 | else | |
2759 | *buf_p = buf; | |
2760 | return buf_pos; | |
2761 | } | |
2762 | ||
2763 | buf_pos += n; | |
2764 | ||
2765 | /* If the buffer is filling up, expand it. */ | |
2766 | if (buf_alloc < buf_pos * 2) | |
2767 | { | |
2768 | buf_alloc *= 2; | |
2769 | buf = xrealloc (buf, buf_alloc); | |
2770 | } | |
2771 | ||
2772 | QUIT; | |
2773 | } | |
2774 | } | |
2775 | ||
2776 | /* Read target file FILENAME. Store the result in *BUF_P and return | |
2777 | the size of the transferred data. See the declaration in "target.h" | |
2778 | function for more information about the return value. */ | |
2779 | ||
2780 | LONGEST | |
2781 | target_fileio_read_alloc (const char *filename, gdb_byte **buf_p) | |
2782 | { | |
2783 | return target_fileio_read_alloc_1 (filename, buf_p, 0); | |
2784 | } | |
2785 | ||
2786 | /* Read target file FILENAME. The result is NUL-terminated and | |
2787 | returned as a string, allocated using xmalloc. If an error occurs | |
2788 | or the transfer is unsupported, NULL is returned. Empty objects | |
2789 | are returned as allocated but empty strings. A warning is issued | |
2790 | if the result contains any embedded NUL bytes. */ | |
2791 | ||
2792 | char * | |
2793 | target_fileio_read_stralloc (const char *filename) | |
2794 | { | |
39086a0e PA |
2795 | gdb_byte *buffer; |
2796 | char *bufstr; | |
7313baad UW |
2797 | LONGEST i, transferred; |
2798 | ||
39086a0e PA |
2799 | transferred = target_fileio_read_alloc_1 (filename, &buffer, 1); |
2800 | bufstr = (char *) buffer; | |
7313baad UW |
2801 | |
2802 | if (transferred < 0) | |
2803 | return NULL; | |
2804 | ||
2805 | if (transferred == 0) | |
2806 | return xstrdup (""); | |
2807 | ||
39086a0e | 2808 | bufstr[transferred] = 0; |
7313baad UW |
2809 | |
2810 | /* Check for embedded NUL bytes; but allow trailing NULs. */ | |
39086a0e PA |
2811 | for (i = strlen (bufstr); i < transferred; i++) |
2812 | if (bufstr[i] != 0) | |
7313baad UW |
2813 | { |
2814 | warning (_("target file %s " | |
2815 | "contained unexpected null characters"), | |
2816 | filename); | |
2817 | break; | |
2818 | } | |
2819 | ||
39086a0e | 2820 | return bufstr; |
7313baad UW |
2821 | } |
2822 | ||
2823 | ||
e0d24f8d | 2824 | static int |
31568a15 TT |
2825 | default_region_ok_for_hw_watchpoint (struct target_ops *self, |
2826 | CORE_ADDR addr, int len) | |
e0d24f8d | 2827 | { |
f5656ead | 2828 | return (len <= gdbarch_ptr_bit (target_gdbarch ()) / TARGET_CHAR_BIT); |
ccaa32c7 GS |
2829 | } |
2830 | ||
5009afc5 AS |
2831 | static int |
2832 | default_watchpoint_addr_within_range (struct target_ops *target, | |
2833 | CORE_ADDR addr, | |
2834 | CORE_ADDR start, int length) | |
2835 | { | |
2836 | return addr >= start && addr < start + length; | |
2837 | } | |
2838 | ||
c2250ad1 UW |
2839 | static struct gdbarch * |
2840 | default_thread_architecture (struct target_ops *ops, ptid_t ptid) | |
2841 | { | |
f5656ead | 2842 | return target_gdbarch (); |
c2250ad1 UW |
2843 | } |
2844 | ||
c906108c | 2845 | static int |
555bbdeb TT |
2846 | return_zero (struct target_ops *ignore) |
2847 | { | |
2848 | return 0; | |
2849 | } | |
2850 | ||
2851 | static int | |
2852 | return_zero_has_execution (struct target_ops *ignore, ptid_t ignore2) | |
c906108c SS |
2853 | { |
2854 | return 0; | |
2855 | } | |
2856 | ||
ed9a39eb JM |
2857 | /* |
2858 | * Find the next target down the stack from the specified target. | |
2859 | */ | |
2860 | ||
2861 | struct target_ops * | |
fba45db2 | 2862 | find_target_beneath (struct target_ops *t) |
ed9a39eb | 2863 | { |
258b763a | 2864 | return t->beneath; |
ed9a39eb JM |
2865 | } |
2866 | ||
8b06beed TT |
2867 | /* See target.h. */ |
2868 | ||
2869 | struct target_ops * | |
2870 | find_target_at (enum strata stratum) | |
2871 | { | |
2872 | struct target_ops *t; | |
2873 | ||
2874 | for (t = current_target.beneath; t != NULL; t = t->beneath) | |
2875 | if (t->to_stratum == stratum) | |
2876 | return t; | |
2877 | ||
2878 | return NULL; | |
2879 | } | |
2880 | ||
c906108c SS |
2881 | \f |
2882 | /* The inferior process has died. Long live the inferior! */ | |
2883 | ||
2884 | void | |
fba45db2 | 2885 | generic_mourn_inferior (void) |
c906108c | 2886 | { |
7f9f62ba | 2887 | ptid_t ptid; |
c906108c | 2888 | |
7f9f62ba | 2889 | ptid = inferior_ptid; |
39f77062 | 2890 | inferior_ptid = null_ptid; |
7f9f62ba | 2891 | |
f59f708a PA |
2892 | /* Mark breakpoints uninserted in case something tries to delete a |
2893 | breakpoint while we delete the inferior's threads (which would | |
2894 | fail, since the inferior is long gone). */ | |
2895 | mark_breakpoints_out (); | |
2896 | ||
7f9f62ba PA |
2897 | if (!ptid_equal (ptid, null_ptid)) |
2898 | { | |
2899 | int pid = ptid_get_pid (ptid); | |
6c95b8df | 2900 | exit_inferior (pid); |
7f9f62ba PA |
2901 | } |
2902 | ||
f59f708a PA |
2903 | /* Note this wipes step-resume breakpoints, so needs to be done |
2904 | after exit_inferior, which ends up referencing the step-resume | |
2905 | breakpoints through clear_thread_inferior_resources. */ | |
c906108c | 2906 | breakpoint_init_inferior (inf_exited); |
f59f708a | 2907 | |
c906108c SS |
2908 | registers_changed (); |
2909 | ||
c906108c SS |
2910 | reopen_exec_file (); |
2911 | reinit_frame_cache (); | |
2912 | ||
9a4105ab AC |
2913 | if (deprecated_detach_hook) |
2914 | deprecated_detach_hook (); | |
c906108c SS |
2915 | } |
2916 | \f | |
fd0a2a6f MK |
2917 | /* Convert a normal process ID to a string. Returns the string in a |
2918 | static buffer. */ | |
c906108c SS |
2919 | |
2920 | char * | |
39f77062 | 2921 | normal_pid_to_str (ptid_t ptid) |
c906108c | 2922 | { |
fd0a2a6f | 2923 | static char buf[32]; |
c906108c | 2924 | |
5fff8fc0 | 2925 | xsnprintf (buf, sizeof buf, "process %d", ptid_get_pid (ptid)); |
c906108c SS |
2926 | return buf; |
2927 | } | |
2928 | ||
2c0b251b | 2929 | static char * |
770234d3 | 2930 | default_pid_to_str (struct target_ops *ops, ptid_t ptid) |
117de6a9 PA |
2931 | { |
2932 | return normal_pid_to_str (ptid); | |
2933 | } | |
2934 | ||
9b4eba8e HZ |
2935 | /* Error-catcher for target_find_memory_regions. */ |
2936 | static int | |
2e73927c TT |
2937 | dummy_find_memory_regions (struct target_ops *self, |
2938 | find_memory_region_ftype ignore1, void *ignore2) | |
be4d1333 | 2939 | { |
9b4eba8e | 2940 | error (_("Command not implemented for this target.")); |
be4d1333 MS |
2941 | return 0; |
2942 | } | |
2943 | ||
9b4eba8e HZ |
2944 | /* Error-catcher for target_make_corefile_notes. */ |
2945 | static char * | |
fc6691b2 TT |
2946 | dummy_make_corefile_notes (struct target_ops *self, |
2947 | bfd *ignore1, int *ignore2) | |
be4d1333 | 2948 | { |
9b4eba8e | 2949 | error (_("Command not implemented for this target.")); |
be4d1333 MS |
2950 | return NULL; |
2951 | } | |
2952 | ||
c906108c SS |
2953 | /* Set up the handful of non-empty slots needed by the dummy target |
2954 | vector. */ | |
2955 | ||
2956 | static void | |
fba45db2 | 2957 | init_dummy_target (void) |
c906108c SS |
2958 | { |
2959 | dummy_target.to_shortname = "None"; | |
2960 | dummy_target.to_longname = "None"; | |
2961 | dummy_target.to_doc = ""; | |
03583c20 UW |
2962 | dummy_target.to_supports_disable_randomization |
2963 | = find_default_supports_disable_randomization; | |
c906108c | 2964 | dummy_target.to_stratum = dummy_stratum; |
555bbdeb TT |
2965 | dummy_target.to_has_all_memory = return_zero; |
2966 | dummy_target.to_has_memory = return_zero; | |
2967 | dummy_target.to_has_stack = return_zero; | |
2968 | dummy_target.to_has_registers = return_zero; | |
2969 | dummy_target.to_has_execution = return_zero_has_execution; | |
c906108c | 2970 | dummy_target.to_magic = OPS_MAGIC; |
1101cb7b TT |
2971 | |
2972 | install_dummy_methods (&dummy_target); | |
c906108c | 2973 | } |
c906108c | 2974 | \f |
c906108c | 2975 | |
f1c07ab0 | 2976 | void |
460014f5 | 2977 | target_close (struct target_ops *targ) |
f1c07ab0 | 2978 | { |
7fdc1521 TT |
2979 | gdb_assert (!target_is_pushed (targ)); |
2980 | ||
f1c07ab0 | 2981 | if (targ->to_xclose != NULL) |
460014f5 | 2982 | targ->to_xclose (targ); |
f1c07ab0 | 2983 | else if (targ->to_close != NULL) |
de90e03d | 2984 | targ->to_close (targ); |
947b8855 PA |
2985 | |
2986 | if (targetdebug) | |
460014f5 | 2987 | fprintf_unfiltered (gdb_stdlog, "target_close ()\n"); |
f1c07ab0 AC |
2988 | } |
2989 | ||
28439f5e PA |
2990 | int |
2991 | target_thread_alive (ptid_t ptid) | |
c906108c | 2992 | { |
a7068b60 | 2993 | return current_target.to_thread_alive (¤t_target, ptid); |
28439f5e PA |
2994 | } |
2995 | ||
2996 | void | |
2997 | target_find_new_threads (void) | |
2998 | { | |
09b0dc2b | 2999 | current_target.to_find_new_threads (¤t_target); |
c906108c SS |
3000 | } |
3001 | ||
d914c394 SS |
3002 | void |
3003 | target_stop (ptid_t ptid) | |
3004 | { | |
3005 | if (!may_stop) | |
3006 | { | |
3007 | warning (_("May not interrupt or stop the target, ignoring attempt")); | |
3008 | return; | |
3009 | } | |
3010 | ||
1eab8a48 | 3011 | (*current_target.to_stop) (¤t_target, ptid); |
d914c394 SS |
3012 | } |
3013 | ||
09826ec5 PA |
3014 | /* Concatenate ELEM to LIST, a comma separate list, and return the |
3015 | result. The LIST incoming argument is released. */ | |
3016 | ||
3017 | static char * | |
3018 | str_comma_list_concat_elem (char *list, const char *elem) | |
3019 | { | |
3020 | if (list == NULL) | |
3021 | return xstrdup (elem); | |
3022 | else | |
3023 | return reconcat (list, list, ", ", elem, (char *) NULL); | |
3024 | } | |
3025 | ||
3026 | /* Helper for target_options_to_string. If OPT is present in | |
3027 | TARGET_OPTIONS, append the OPT_STR (string version of OPT) in RET. | |
3028 | Returns the new resulting string. OPT is removed from | |
3029 | TARGET_OPTIONS. */ | |
3030 | ||
3031 | static char * | |
3032 | do_option (int *target_options, char *ret, | |
3033 | int opt, char *opt_str) | |
3034 | { | |
3035 | if ((*target_options & opt) != 0) | |
3036 | { | |
3037 | ret = str_comma_list_concat_elem (ret, opt_str); | |
3038 | *target_options &= ~opt; | |
3039 | } | |
3040 | ||
3041 | return ret; | |
3042 | } | |
3043 | ||
3044 | char * | |
3045 | target_options_to_string (int target_options) | |
3046 | { | |
3047 | char *ret = NULL; | |
3048 | ||
3049 | #define DO_TARG_OPTION(OPT) \ | |
3050 | ret = do_option (&target_options, ret, OPT, #OPT) | |
3051 | ||
3052 | DO_TARG_OPTION (TARGET_WNOHANG); | |
3053 | ||
3054 | if (target_options != 0) | |
3055 | ret = str_comma_list_concat_elem (ret, "unknown???"); | |
3056 | ||
3057 | if (ret == NULL) | |
3058 | ret = xstrdup (""); | |
3059 | return ret; | |
3060 | } | |
3061 | ||
bf0c5130 | 3062 | static void |
56be3814 UW |
3063 | debug_print_register (const char * func, |
3064 | struct regcache *regcache, int regno) | |
bf0c5130 | 3065 | { |
f8d29908 | 3066 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
5d502164 | 3067 | |
bf0c5130 | 3068 | fprintf_unfiltered (gdb_stdlog, "%s ", func); |
f8d29908 | 3069 | if (regno >= 0 && regno < gdbarch_num_regs (gdbarch) |
f8d29908 UW |
3070 | && gdbarch_register_name (gdbarch, regno) != NULL |
3071 | && gdbarch_register_name (gdbarch, regno)[0] != '\0') | |
3072 | fprintf_unfiltered (gdb_stdlog, "(%s)", | |
3073 | gdbarch_register_name (gdbarch, regno)); | |
bf0c5130 AC |
3074 | else |
3075 | fprintf_unfiltered (gdb_stdlog, "(%d)", regno); | |
0ff58721 | 3076 | if (regno >= 0 && regno < gdbarch_num_regs (gdbarch)) |
bf0c5130 | 3077 | { |
e17a4113 | 3078 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
f8d29908 | 3079 | int i, size = register_size (gdbarch, regno); |
e362b510 | 3080 | gdb_byte buf[MAX_REGISTER_SIZE]; |
5d502164 | 3081 | |
0ff58721 | 3082 | regcache_raw_collect (regcache, regno, buf); |
bf0c5130 | 3083 | fprintf_unfiltered (gdb_stdlog, " = "); |
81c4a259 | 3084 | for (i = 0; i < size; i++) |
bf0c5130 AC |
3085 | { |
3086 | fprintf_unfiltered (gdb_stdlog, "%02x", buf[i]); | |
3087 | } | |
81c4a259 | 3088 | if (size <= sizeof (LONGEST)) |
bf0c5130 | 3089 | { |
e17a4113 | 3090 | ULONGEST val = extract_unsigned_integer (buf, size, byte_order); |
5d502164 | 3091 | |
0b1553bc UW |
3092 | fprintf_unfiltered (gdb_stdlog, " %s %s", |
3093 | core_addr_to_string_nz (val), plongest (val)); | |
bf0c5130 AC |
3094 | } |
3095 | } | |
3096 | fprintf_unfiltered (gdb_stdlog, "\n"); | |
3097 | } | |
3098 | ||
28439f5e PA |
3099 | void |
3100 | target_fetch_registers (struct regcache *regcache, int regno) | |
c906108c | 3101 | { |
ad5989bd TT |
3102 | current_target.to_fetch_registers (¤t_target, regcache, regno); |
3103 | if (targetdebug) | |
3104 | debug_print_register ("target_fetch_registers", regcache, regno); | |
c906108c SS |
3105 | } |
3106 | ||
28439f5e PA |
3107 | void |
3108 | target_store_registers (struct regcache *regcache, int regno) | |
c906108c | 3109 | { |
28439f5e | 3110 | struct target_ops *t; |
5d502164 | 3111 | |
d914c394 SS |
3112 | if (!may_write_registers) |
3113 | error (_("Writing to registers is not allowed (regno %d)"), regno); | |
3114 | ||
6b84065d TT |
3115 | current_target.to_store_registers (¤t_target, regcache, regno); |
3116 | if (targetdebug) | |
28439f5e | 3117 | { |
6b84065d | 3118 | debug_print_register ("target_store_registers", regcache, regno); |
28439f5e | 3119 | } |
c906108c SS |
3120 | } |
3121 | ||
dc146f7c VP |
3122 | int |
3123 | target_core_of_thread (ptid_t ptid) | |
3124 | { | |
a7068b60 | 3125 | return current_target.to_core_of_thread (¤t_target, ptid); |
dc146f7c VP |
3126 | } |
3127 | ||
936d2992 PA |
3128 | int |
3129 | simple_verify_memory (struct target_ops *ops, | |
3130 | const gdb_byte *data, CORE_ADDR lma, ULONGEST size) | |
3131 | { | |
3132 | LONGEST total_xfered = 0; | |
3133 | ||
3134 | while (total_xfered < size) | |
3135 | { | |
3136 | ULONGEST xfered_len; | |
3137 | enum target_xfer_status status; | |
3138 | gdb_byte buf[1024]; | |
3139 | ULONGEST howmuch = min (sizeof (buf), size - total_xfered); | |
3140 | ||
3141 | status = target_xfer_partial (ops, TARGET_OBJECT_MEMORY, NULL, | |
3142 | buf, NULL, lma + total_xfered, howmuch, | |
3143 | &xfered_len); | |
3144 | if (status == TARGET_XFER_OK | |
3145 | && memcmp (data + total_xfered, buf, xfered_len) == 0) | |
3146 | { | |
3147 | total_xfered += xfered_len; | |
3148 | QUIT; | |
3149 | } | |
3150 | else | |
3151 | return 0; | |
3152 | } | |
3153 | return 1; | |
3154 | } | |
3155 | ||
3156 | /* Default implementation of memory verification. */ | |
3157 | ||
3158 | static int | |
3159 | default_verify_memory (struct target_ops *self, | |
3160 | const gdb_byte *data, CORE_ADDR memaddr, ULONGEST size) | |
3161 | { | |
3162 | /* Start over from the top of the target stack. */ | |
3163 | return simple_verify_memory (current_target.beneath, | |
3164 | data, memaddr, size); | |
3165 | } | |
3166 | ||
4a5e7a5b PA |
3167 | int |
3168 | target_verify_memory (const gdb_byte *data, CORE_ADDR memaddr, ULONGEST size) | |
3169 | { | |
a7068b60 TT |
3170 | return current_target.to_verify_memory (¤t_target, |
3171 | data, memaddr, size); | |
4a5e7a5b PA |
3172 | } |
3173 | ||
9c06b0b4 TJB |
3174 | /* The documentation for this function is in its prototype declaration in |
3175 | target.h. */ | |
3176 | ||
3177 | int | |
3178 | target_insert_mask_watchpoint (CORE_ADDR addr, CORE_ADDR mask, int rw) | |
3179 | { | |
a7068b60 TT |
3180 | return current_target.to_insert_mask_watchpoint (¤t_target, |
3181 | addr, mask, rw); | |
9c06b0b4 TJB |
3182 | } |
3183 | ||
3184 | /* The documentation for this function is in its prototype declaration in | |
3185 | target.h. */ | |
3186 | ||
3187 | int | |
3188 | target_remove_mask_watchpoint (CORE_ADDR addr, CORE_ADDR mask, int rw) | |
3189 | { | |
a7068b60 TT |
3190 | return current_target.to_remove_mask_watchpoint (¤t_target, |
3191 | addr, mask, rw); | |
9c06b0b4 TJB |
3192 | } |
3193 | ||
3194 | /* The documentation for this function is in its prototype declaration | |
3195 | in target.h. */ | |
3196 | ||
3197 | int | |
3198 | target_masked_watch_num_registers (CORE_ADDR addr, CORE_ADDR mask) | |
3199 | { | |
6c7e5e5c TT |
3200 | return current_target.to_masked_watch_num_registers (¤t_target, |
3201 | addr, mask); | |
9c06b0b4 TJB |
3202 | } |
3203 | ||
f1310107 TJB |
3204 | /* The documentation for this function is in its prototype declaration |
3205 | in target.h. */ | |
3206 | ||
3207 | int | |
3208 | target_ranged_break_num_registers (void) | |
3209 | { | |
a134316b | 3210 | return current_target.to_ranged_break_num_registers (¤t_target); |
f1310107 TJB |
3211 | } |
3212 | ||
02d27625 MM |
3213 | /* See target.h. */ |
3214 | ||
02d27625 MM |
3215 | struct btrace_target_info * |
3216 | target_enable_btrace (ptid_t ptid) | |
3217 | { | |
6dc7fcf4 | 3218 | return current_target.to_enable_btrace (¤t_target, ptid); |
02d27625 MM |
3219 | } |
3220 | ||
3221 | /* See target.h. */ | |
3222 | ||
3223 | void | |
3224 | target_disable_btrace (struct btrace_target_info *btinfo) | |
3225 | { | |
8dc292d3 | 3226 | current_target.to_disable_btrace (¤t_target, btinfo); |
02d27625 MM |
3227 | } |
3228 | ||
3229 | /* See target.h. */ | |
3230 | ||
3231 | void | |
3232 | target_teardown_btrace (struct btrace_target_info *btinfo) | |
3233 | { | |
9ace480d | 3234 | current_target.to_teardown_btrace (¤t_target, btinfo); |
02d27625 MM |
3235 | } |
3236 | ||
3237 | /* See target.h. */ | |
3238 | ||
969c39fb MM |
3239 | enum btrace_error |
3240 | target_read_btrace (VEC (btrace_block_s) **btrace, | |
3241 | struct btrace_target_info *btinfo, | |
02d27625 MM |
3242 | enum btrace_read_type type) |
3243 | { | |
eb5b20d4 | 3244 | return current_target.to_read_btrace (¤t_target, btrace, btinfo, type); |
02d27625 MM |
3245 | } |
3246 | ||
d02ed0bb MM |
3247 | /* See target.h. */ |
3248 | ||
7c1687a9 MM |
3249 | void |
3250 | target_stop_recording (void) | |
3251 | { | |
ee97f592 | 3252 | current_target.to_stop_recording (¤t_target); |
7c1687a9 MM |
3253 | } |
3254 | ||
3255 | /* See target.h. */ | |
3256 | ||
d02ed0bb | 3257 | void |
85e1311a | 3258 | target_save_record (const char *filename) |
d02ed0bb | 3259 | { |
f09e2107 | 3260 | current_target.to_save_record (¤t_target, filename); |
d02ed0bb MM |
3261 | } |
3262 | ||
3263 | /* See target.h. */ | |
3264 | ||
3265 | int | |
3266 | target_supports_delete_record (void) | |
3267 | { | |
3268 | struct target_ops *t; | |
3269 | ||
3270 | for (t = current_target.beneath; t != NULL; t = t->beneath) | |
b0ed115f TT |
3271 | if (t->to_delete_record != delegate_delete_record |
3272 | && t->to_delete_record != tdefault_delete_record) | |
d02ed0bb MM |
3273 | return 1; |
3274 | ||
3275 | return 0; | |
3276 | } | |
3277 | ||
3278 | /* See target.h. */ | |
3279 | ||
3280 | void | |
3281 | target_delete_record (void) | |
3282 | { | |
07366925 | 3283 | current_target.to_delete_record (¤t_target); |
d02ed0bb MM |
3284 | } |
3285 | ||
3286 | /* See target.h. */ | |
3287 | ||
3288 | int | |
3289 | target_record_is_replaying (void) | |
3290 | { | |
dd2e9d25 | 3291 | return current_target.to_record_is_replaying (¤t_target); |
d02ed0bb MM |
3292 | } |
3293 | ||
3294 | /* See target.h. */ | |
3295 | ||
3296 | void | |
3297 | target_goto_record_begin (void) | |
3298 | { | |
671e76cc | 3299 | current_target.to_goto_record_begin (¤t_target); |
d02ed0bb MM |
3300 | } |
3301 | ||
3302 | /* See target.h. */ | |
3303 | ||
3304 | void | |
3305 | target_goto_record_end (void) | |
3306 | { | |
e9179bb3 | 3307 | current_target.to_goto_record_end (¤t_target); |
d02ed0bb MM |
3308 | } |
3309 | ||
3310 | /* See target.h. */ | |
3311 | ||
3312 | void | |
3313 | target_goto_record (ULONGEST insn) | |
3314 | { | |
05969c84 | 3315 | current_target.to_goto_record (¤t_target, insn); |
d02ed0bb MM |
3316 | } |
3317 | ||
67c86d06 MM |
3318 | /* See target.h. */ |
3319 | ||
3320 | void | |
3321 | target_insn_history (int size, int flags) | |
3322 | { | |
3679abfa | 3323 | current_target.to_insn_history (¤t_target, size, flags); |
67c86d06 MM |
3324 | } |
3325 | ||
3326 | /* See target.h. */ | |
3327 | ||
3328 | void | |
3329 | target_insn_history_from (ULONGEST from, int size, int flags) | |
3330 | { | |
8444ab58 | 3331 | current_target.to_insn_history_from (¤t_target, from, size, flags); |
67c86d06 MM |
3332 | } |
3333 | ||
3334 | /* See target.h. */ | |
3335 | ||
3336 | void | |
3337 | target_insn_history_range (ULONGEST begin, ULONGEST end, int flags) | |
3338 | { | |
c29302cc | 3339 | current_target.to_insn_history_range (¤t_target, begin, end, flags); |
67c86d06 MM |
3340 | } |
3341 | ||
15984c13 MM |
3342 | /* See target.h. */ |
3343 | ||
3344 | void | |
3345 | target_call_history (int size, int flags) | |
3346 | { | |
170049d4 | 3347 | current_target.to_call_history (¤t_target, size, flags); |
15984c13 MM |
3348 | } |
3349 | ||
3350 | /* See target.h. */ | |
3351 | ||
3352 | void | |
3353 | target_call_history_from (ULONGEST begin, int size, int flags) | |
3354 | { | |
16fc27d6 | 3355 | current_target.to_call_history_from (¤t_target, begin, size, flags); |
15984c13 MM |
3356 | } |
3357 | ||
3358 | /* See target.h. */ | |
3359 | ||
3360 | void | |
3361 | target_call_history_range (ULONGEST begin, ULONGEST end, int flags) | |
3362 | { | |
115d9817 | 3363 | current_target.to_call_history_range (¤t_target, begin, end, flags); |
15984c13 MM |
3364 | } |
3365 | ||
ea001bdc MM |
3366 | /* See target.h. */ |
3367 | ||
3368 | const struct frame_unwind * | |
3369 | target_get_unwinder (void) | |
3370 | { | |
ac01945b | 3371 | return current_target.to_get_unwinder (¤t_target); |
ea001bdc MM |
3372 | } |
3373 | ||
3374 | /* See target.h. */ | |
3375 | ||
3376 | const struct frame_unwind * | |
3377 | target_get_tailcall_unwinder (void) | |
3378 | { | |
ac01945b | 3379 | return current_target.to_get_tailcall_unwinder (¤t_target); |
ea001bdc MM |
3380 | } |
3381 | ||
c0eca49f | 3382 | /* Default implementation of to_decr_pc_after_break. */ |
118e6252 | 3383 | |
c0eca49f TT |
3384 | static CORE_ADDR |
3385 | default_target_decr_pc_after_break (struct target_ops *ops, | |
118e6252 MM |
3386 | struct gdbarch *gdbarch) |
3387 | { | |
118e6252 MM |
3388 | return gdbarch_decr_pc_after_break (gdbarch); |
3389 | } | |
3390 | ||
3391 | /* See target.h. */ | |
3392 | ||
3393 | CORE_ADDR | |
3394 | target_decr_pc_after_break (struct gdbarch *gdbarch) | |
3395 | { | |
c0eca49f | 3396 | return current_target.to_decr_pc_after_break (¤t_target, gdbarch); |
118e6252 MM |
3397 | } |
3398 | ||
5fff78c4 MM |
3399 | /* See target.h. */ |
3400 | ||
3401 | void | |
3402 | target_prepare_to_generate_core (void) | |
3403 | { | |
3404 | current_target.to_prepare_to_generate_core (¤t_target); | |
3405 | } | |
3406 | ||
3407 | /* See target.h. */ | |
3408 | ||
3409 | void | |
3410 | target_done_generating_core (void) | |
3411 | { | |
3412 | current_target.to_done_generating_core (¤t_target); | |
3413 | } | |
3414 | ||
c906108c | 3415 | static void |
fba45db2 | 3416 | setup_target_debug (void) |
c906108c SS |
3417 | { |
3418 | memcpy (&debug_target, ¤t_target, sizeof debug_target); | |
3419 | ||
a7068b60 | 3420 | init_debug_target (¤t_target); |
c906108c | 3421 | } |
c906108c | 3422 | \f |
c5aa993b JM |
3423 | |
3424 | static char targ_desc[] = | |
3e43a32a MS |
3425 | "Names of targets and files being debugged.\nShows the entire \ |
3426 | stack of targets currently in use (including the exec-file,\n\ | |
c906108c SS |
3427 | core-file, and process, if any), as well as the symbol file name."; |
3428 | ||
a53f3625 | 3429 | static void |
a30bf1f1 TT |
3430 | default_rcmd (struct target_ops *self, const char *command, |
3431 | struct ui_file *output) | |
a53f3625 TT |
3432 | { |
3433 | error (_("\"monitor\" command not supported by this target.")); | |
3434 | } | |
3435 | ||
96baa820 JM |
3436 | static void |
3437 | do_monitor_command (char *cmd, | |
3438 | int from_tty) | |
3439 | { | |
96baa820 JM |
3440 | target_rcmd (cmd, gdb_stdtarg); |
3441 | } | |
3442 | ||
87680a14 JB |
3443 | /* Print the name of each layers of our target stack. */ |
3444 | ||
3445 | static void | |
3446 | maintenance_print_target_stack (char *cmd, int from_tty) | |
3447 | { | |
3448 | struct target_ops *t; | |
3449 | ||
3450 | printf_filtered (_("The current target stack is:\n")); | |
3451 | ||
3452 | for (t = target_stack; t != NULL; t = t->beneath) | |
3453 | { | |
3454 | printf_filtered (" - %s (%s)\n", t->to_shortname, t->to_longname); | |
3455 | } | |
3456 | } | |
3457 | ||
329ea579 PA |
3458 | /* Controls if targets can report that they can/are async. This is |
3459 | just for maintainers to use when debugging gdb. */ | |
3460 | int target_async_permitted = 1; | |
c6ebd6cf VP |
3461 | |
3462 | /* The set command writes to this variable. If the inferior is | |
b5419e49 | 3463 | executing, target_async_permitted is *not* updated. */ |
329ea579 | 3464 | static int target_async_permitted_1 = 1; |
c6ebd6cf VP |
3465 | |
3466 | static void | |
329ea579 PA |
3467 | maint_set_target_async_command (char *args, int from_tty, |
3468 | struct cmd_list_element *c) | |
c6ebd6cf | 3469 | { |
c35b1492 | 3470 | if (have_live_inferiors ()) |
c6ebd6cf VP |
3471 | { |
3472 | target_async_permitted_1 = target_async_permitted; | |
3473 | error (_("Cannot change this setting while the inferior is running.")); | |
3474 | } | |
3475 | ||
3476 | target_async_permitted = target_async_permitted_1; | |
3477 | } | |
3478 | ||
3479 | static void | |
329ea579 PA |
3480 | maint_show_target_async_command (struct ui_file *file, int from_tty, |
3481 | struct cmd_list_element *c, | |
3482 | const char *value) | |
c6ebd6cf | 3483 | { |
3e43a32a MS |
3484 | fprintf_filtered (file, |
3485 | _("Controlling the inferior in " | |
3486 | "asynchronous mode is %s.\n"), value); | |
c6ebd6cf VP |
3487 | } |
3488 | ||
d914c394 SS |
3489 | /* Temporary copies of permission settings. */ |
3490 | ||
3491 | static int may_write_registers_1 = 1; | |
3492 | static int may_write_memory_1 = 1; | |
3493 | static int may_insert_breakpoints_1 = 1; | |
3494 | static int may_insert_tracepoints_1 = 1; | |
3495 | static int may_insert_fast_tracepoints_1 = 1; | |
3496 | static int may_stop_1 = 1; | |
3497 | ||
3498 | /* Make the user-set values match the real values again. */ | |
3499 | ||
3500 | void | |
3501 | update_target_permissions (void) | |
3502 | { | |
3503 | may_write_registers_1 = may_write_registers; | |
3504 | may_write_memory_1 = may_write_memory; | |
3505 | may_insert_breakpoints_1 = may_insert_breakpoints; | |
3506 | may_insert_tracepoints_1 = may_insert_tracepoints; | |
3507 | may_insert_fast_tracepoints_1 = may_insert_fast_tracepoints; | |
3508 | may_stop_1 = may_stop; | |
3509 | } | |
3510 | ||
3511 | /* The one function handles (most of) the permission flags in the same | |
3512 | way. */ | |
3513 | ||
3514 | static void | |
3515 | set_target_permissions (char *args, int from_tty, | |
3516 | struct cmd_list_element *c) | |
3517 | { | |
3518 | if (target_has_execution) | |
3519 | { | |
3520 | update_target_permissions (); | |
3521 | error (_("Cannot change this setting while the inferior is running.")); | |
3522 | } | |
3523 | ||
3524 | /* Make the real values match the user-changed values. */ | |
3525 | may_write_registers = may_write_registers_1; | |
3526 | may_insert_breakpoints = may_insert_breakpoints_1; | |
3527 | may_insert_tracepoints = may_insert_tracepoints_1; | |
3528 | may_insert_fast_tracepoints = may_insert_fast_tracepoints_1; | |
3529 | may_stop = may_stop_1; | |
3530 | update_observer_mode (); | |
3531 | } | |
3532 | ||
3533 | /* Set memory write permission independently of observer mode. */ | |
3534 | ||
3535 | static void | |
3536 | set_write_memory_permission (char *args, int from_tty, | |
3537 | struct cmd_list_element *c) | |
3538 | { | |
3539 | /* Make the real values match the user-changed values. */ | |
3540 | may_write_memory = may_write_memory_1; | |
3541 | update_observer_mode (); | |
3542 | } | |
3543 | ||
3544 | ||
c906108c | 3545 | void |
fba45db2 | 3546 | initialize_targets (void) |
c906108c SS |
3547 | { |
3548 | init_dummy_target (); | |
3549 | push_target (&dummy_target); | |
3550 | ||
3551 | add_info ("target", target_info, targ_desc); | |
3552 | add_info ("files", target_info, targ_desc); | |
3553 | ||
ccce17b0 | 3554 | add_setshow_zuinteger_cmd ("target", class_maintenance, &targetdebug, _("\ |
85c07804 AC |
3555 | Set target debugging."), _("\ |
3556 | Show target debugging."), _("\ | |
333dabeb | 3557 | When non-zero, target debugging is enabled. Higher numbers are more\n\ |
3cecbbbe TT |
3558 | verbose."), |
3559 | set_targetdebug, | |
ccce17b0 YQ |
3560 | show_targetdebug, |
3561 | &setdebuglist, &showdebuglist); | |
3a11626d | 3562 | |
2bc416ba | 3563 | add_setshow_boolean_cmd ("trust-readonly-sections", class_support, |
7915a72c AC |
3564 | &trust_readonly, _("\ |
3565 | Set mode for reading from readonly sections."), _("\ | |
3566 | Show mode for reading from readonly sections."), _("\ | |
3a11626d MS |
3567 | When this mode is on, memory reads from readonly sections (such as .text)\n\ |
3568 | will be read from the object file instead of from the target. This will\n\ | |
7915a72c | 3569 | result in significant performance improvement for remote targets."), |
2c5b56ce | 3570 | NULL, |
920d2a44 | 3571 | show_trust_readonly, |
e707bbc2 | 3572 | &setlist, &showlist); |
96baa820 JM |
3573 | |
3574 | add_com ("monitor", class_obscure, do_monitor_command, | |
1bedd215 | 3575 | _("Send a command to the remote monitor (remote targets only).")); |
96baa820 | 3576 | |
87680a14 JB |
3577 | add_cmd ("target-stack", class_maintenance, maintenance_print_target_stack, |
3578 | _("Print the name of each layer of the internal target stack."), | |
3579 | &maintenanceprintlist); | |
3580 | ||
c6ebd6cf VP |
3581 | add_setshow_boolean_cmd ("target-async", no_class, |
3582 | &target_async_permitted_1, _("\ | |
3583 | Set whether gdb controls the inferior in asynchronous mode."), _("\ | |
3584 | Show whether gdb controls the inferior in asynchronous mode."), _("\ | |
3585 | Tells gdb whether to control the inferior in asynchronous mode."), | |
329ea579 PA |
3586 | maint_set_target_async_command, |
3587 | maint_show_target_async_command, | |
3588 | &maintenance_set_cmdlist, | |
3589 | &maintenance_show_cmdlist); | |
c6ebd6cf | 3590 | |
d914c394 SS |
3591 | add_setshow_boolean_cmd ("may-write-registers", class_support, |
3592 | &may_write_registers_1, _("\ | |
3593 | Set permission to write into registers."), _("\ | |
3594 | Show permission to write into registers."), _("\ | |
3595 | When this permission is on, GDB may write into the target's registers.\n\ | |
3596 | Otherwise, any sort of write attempt will result in an error."), | |
3597 | set_target_permissions, NULL, | |
3598 | &setlist, &showlist); | |
3599 | ||
3600 | add_setshow_boolean_cmd ("may-write-memory", class_support, | |
3601 | &may_write_memory_1, _("\ | |
3602 | Set permission to write into target memory."), _("\ | |
3603 | Show permission to write into target memory."), _("\ | |
3604 | When this permission is on, GDB may write into the target's memory.\n\ | |
3605 | Otherwise, any sort of write attempt will result in an error."), | |
3606 | set_write_memory_permission, NULL, | |
3607 | &setlist, &showlist); | |
3608 | ||
3609 | add_setshow_boolean_cmd ("may-insert-breakpoints", class_support, | |
3610 | &may_insert_breakpoints_1, _("\ | |
3611 | Set permission to insert breakpoints in the target."), _("\ | |
3612 | Show permission to insert breakpoints in the target."), _("\ | |
3613 | When this permission is on, GDB may insert breakpoints in the program.\n\ | |
3614 | Otherwise, any sort of insertion attempt will result in an error."), | |
3615 | set_target_permissions, NULL, | |
3616 | &setlist, &showlist); | |
3617 | ||
3618 | add_setshow_boolean_cmd ("may-insert-tracepoints", class_support, | |
3619 | &may_insert_tracepoints_1, _("\ | |
3620 | Set permission to insert tracepoints in the target."), _("\ | |
3621 | Show permission to insert tracepoints in the target."), _("\ | |
3622 | When this permission is on, GDB may insert tracepoints in the program.\n\ | |
3623 | Otherwise, any sort of insertion attempt will result in an error."), | |
3624 | set_target_permissions, NULL, | |
3625 | &setlist, &showlist); | |
3626 | ||
3627 | add_setshow_boolean_cmd ("may-insert-fast-tracepoints", class_support, | |
3628 | &may_insert_fast_tracepoints_1, _("\ | |
3629 | Set permission to insert fast tracepoints in the target."), _("\ | |
3630 | Show permission to insert fast tracepoints in the target."), _("\ | |
3631 | When this permission is on, GDB may insert fast tracepoints.\n\ | |
3632 | Otherwise, any sort of insertion attempt will result in an error."), | |
3633 | set_target_permissions, NULL, | |
3634 | &setlist, &showlist); | |
3635 | ||
3636 | add_setshow_boolean_cmd ("may-interrupt", class_support, | |
3637 | &may_stop_1, _("\ | |
3638 | Set permission to interrupt or signal the target."), _("\ | |
3639 | Show permission to interrupt or signal the target."), _("\ | |
3640 | When this permission is on, GDB may interrupt/stop the target's execution.\n\ | |
3641 | Otherwise, any attempt to interrupt or stop will be ignored."), | |
3642 | set_target_permissions, NULL, | |
3643 | &setlist, &showlist); | |
6a3cb8e8 PA |
3644 | |
3645 | add_setshow_boolean_cmd ("auto-connect-native-target", class_support, | |
3646 | &auto_connect_native_target, _("\ | |
3647 | Set whether GDB may automatically connect to the native target."), _("\ | |
3648 | Show whether GDB may automatically connect to the native target."), _("\ | |
3649 | When on, and GDB is not connected to a target yet, GDB\n\ | |
3650 | attempts \"run\" and other commands with the native target."), | |
3651 | NULL, show_auto_connect_native_target, | |
3652 | &setlist, &showlist); | |
c906108c | 3653 | } |