Commit | Line | Data |
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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 | ||
721ec300 GB |
1272 | /* See target/target.h. */ |
1273 | ||
1274 | int | |
1275 | target_read_uint32 (CORE_ADDR memaddr, uint32_t *result) | |
1276 | { | |
1277 | gdb_byte buf[4]; | |
1278 | int r; | |
1279 | ||
1280 | r = target_read_memory (memaddr, buf, sizeof buf); | |
1281 | if (r != 0) | |
1282 | return r; | |
1283 | *result = extract_unsigned_integer (buf, sizeof buf, | |
1284 | gdbarch_byte_order (target_gdbarch ())); | |
1285 | return 0; | |
1286 | } | |
1287 | ||
aee4bf85 PA |
1288 | /* Like target_read_memory, but specify explicitly that this is a read |
1289 | from the target's raw memory. That is, this read bypasses the | |
1290 | dcache, breakpoint shadowing, etc. */ | |
1291 | ||
1292 | int | |
1293 | target_read_raw_memory (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len) | |
1294 | { | |
1295 | /* See comment in target_read_memory about why the request starts at | |
1296 | current_target.beneath. */ | |
1297 | if (target_read (current_target.beneath, TARGET_OBJECT_RAW_MEMORY, NULL, | |
1298 | myaddr, memaddr, len) == len) | |
1299 | return 0; | |
1300 | else | |
1301 | return TARGET_XFER_E_IO; | |
1302 | } | |
1303 | ||
4e5d721f DE |
1304 | /* Like target_read_memory, but specify explicitly that this is a read from |
1305 | the target's stack. This may trigger different cache behavior. */ | |
1306 | ||
1307 | int | |
45aa4659 | 1308 | target_read_stack (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len) |
4e5d721f | 1309 | { |
aee4bf85 PA |
1310 | /* See comment in target_read_memory about why the request starts at |
1311 | current_target.beneath. */ | |
4e5d721f DE |
1312 | if (target_read (current_target.beneath, TARGET_OBJECT_STACK_MEMORY, NULL, |
1313 | myaddr, memaddr, len) == len) | |
1314 | return 0; | |
1315 | else | |
578d3588 | 1316 | return TARGET_XFER_E_IO; |
4e5d721f DE |
1317 | } |
1318 | ||
29453a14 YQ |
1319 | /* Like target_read_memory, but specify explicitly that this is a read from |
1320 | the target's code. This may trigger different cache behavior. */ | |
1321 | ||
1322 | int | |
1323 | target_read_code (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len) | |
1324 | { | |
aee4bf85 PA |
1325 | /* See comment in target_read_memory about why the request starts at |
1326 | current_target.beneath. */ | |
29453a14 YQ |
1327 | if (target_read (current_target.beneath, TARGET_OBJECT_CODE_MEMORY, NULL, |
1328 | myaddr, memaddr, len) == len) | |
1329 | return 0; | |
1330 | else | |
1331 | return TARGET_XFER_E_IO; | |
1332 | } | |
1333 | ||
7f79c47e | 1334 | /* Write LEN bytes from MYADDR to target memory at address MEMADDR. |
9b409511 | 1335 | Returns either 0 for success or TARGET_XFER_E_IO if any |
578d3588 PA |
1336 | error occurs. If an error occurs, no guarantee is made about how |
1337 | much data got written. Callers that can deal with partial writes | |
1338 | should call target_write. */ | |
7f79c47e | 1339 | |
c906108c | 1340 | int |
45aa4659 | 1341 | target_write_memory (CORE_ADDR memaddr, const gdb_byte *myaddr, ssize_t len) |
c906108c | 1342 | { |
aee4bf85 PA |
1343 | /* See comment in target_read_memory about why the request starts at |
1344 | current_target.beneath. */ | |
c35b1492 | 1345 | if (target_write (current_target.beneath, TARGET_OBJECT_MEMORY, NULL, |
cf7a04e8 DJ |
1346 | myaddr, memaddr, len) == len) |
1347 | return 0; | |
0779438d | 1348 | else |
578d3588 | 1349 | return TARGET_XFER_E_IO; |
c906108c | 1350 | } |
c5aa993b | 1351 | |
f0ba3972 | 1352 | /* Write LEN bytes from MYADDR to target raw memory at address |
9b409511 | 1353 | MEMADDR. Returns either 0 for success or TARGET_XFER_E_IO |
578d3588 PA |
1354 | if any error occurs. If an error occurs, no guarantee is made |
1355 | about how much data got written. Callers that can deal with | |
1356 | partial writes should call target_write. */ | |
f0ba3972 PA |
1357 | |
1358 | int | |
45aa4659 | 1359 | target_write_raw_memory (CORE_ADDR memaddr, const gdb_byte *myaddr, ssize_t len) |
f0ba3972 | 1360 | { |
aee4bf85 PA |
1361 | /* See comment in target_read_memory about why the request starts at |
1362 | current_target.beneath. */ | |
f0ba3972 PA |
1363 | if (target_write (current_target.beneath, TARGET_OBJECT_RAW_MEMORY, NULL, |
1364 | myaddr, memaddr, len) == len) | |
1365 | return 0; | |
1366 | else | |
578d3588 | 1367 | return TARGET_XFER_E_IO; |
f0ba3972 PA |
1368 | } |
1369 | ||
fd79ecee DJ |
1370 | /* Fetch the target's memory map. */ |
1371 | ||
1372 | VEC(mem_region_s) * | |
1373 | target_memory_map (void) | |
1374 | { | |
1375 | VEC(mem_region_s) *result; | |
1376 | struct mem_region *last_one, *this_one; | |
1377 | int ix; | |
1378 | struct target_ops *t; | |
1379 | ||
6b2c5a57 | 1380 | result = current_target.to_memory_map (¤t_target); |
fd79ecee DJ |
1381 | if (result == NULL) |
1382 | return NULL; | |
1383 | ||
1384 | qsort (VEC_address (mem_region_s, result), | |
1385 | VEC_length (mem_region_s, result), | |
1386 | sizeof (struct mem_region), mem_region_cmp); | |
1387 | ||
1388 | /* Check that regions do not overlap. Simultaneously assign | |
1389 | a numbering for the "mem" commands to use to refer to | |
1390 | each region. */ | |
1391 | last_one = NULL; | |
1392 | for (ix = 0; VEC_iterate (mem_region_s, result, ix, this_one); ix++) | |
1393 | { | |
1394 | this_one->number = ix; | |
1395 | ||
1396 | if (last_one && last_one->hi > this_one->lo) | |
1397 | { | |
1398 | warning (_("Overlapping regions in memory map: ignoring")); | |
1399 | VEC_free (mem_region_s, result); | |
1400 | return NULL; | |
1401 | } | |
1402 | last_one = this_one; | |
1403 | } | |
1404 | ||
1405 | return result; | |
1406 | } | |
1407 | ||
a76d924d DJ |
1408 | void |
1409 | target_flash_erase (ULONGEST address, LONGEST length) | |
1410 | { | |
e8a6c6ac | 1411 | current_target.to_flash_erase (¤t_target, address, length); |
a76d924d DJ |
1412 | } |
1413 | ||
1414 | void | |
1415 | target_flash_done (void) | |
1416 | { | |
f6fb2925 | 1417 | current_target.to_flash_done (¤t_target); |
a76d924d DJ |
1418 | } |
1419 | ||
920d2a44 AC |
1420 | static void |
1421 | show_trust_readonly (struct ui_file *file, int from_tty, | |
1422 | struct cmd_list_element *c, const char *value) | |
1423 | { | |
3e43a32a MS |
1424 | fprintf_filtered (file, |
1425 | _("Mode for reading from readonly sections is %s.\n"), | |
920d2a44 AC |
1426 | value); |
1427 | } | |
3a11626d | 1428 | |
7f79c47e | 1429 | /* Target vector read/write partial wrapper functions. */ |
0088c768 | 1430 | |
9b409511 | 1431 | static enum target_xfer_status |
1e3ff5ad AC |
1432 | target_read_partial (struct target_ops *ops, |
1433 | enum target_object object, | |
1b0ba102 | 1434 | const char *annex, gdb_byte *buf, |
9b409511 YQ |
1435 | ULONGEST offset, ULONGEST len, |
1436 | ULONGEST *xfered_len) | |
1e3ff5ad | 1437 | { |
9b409511 YQ |
1438 | return target_xfer_partial (ops, object, annex, buf, NULL, offset, len, |
1439 | xfered_len); | |
1e3ff5ad AC |
1440 | } |
1441 | ||
8a55ffb0 | 1442 | static enum target_xfer_status |
1e3ff5ad AC |
1443 | target_write_partial (struct target_ops *ops, |
1444 | enum target_object object, | |
1b0ba102 | 1445 | const char *annex, const gdb_byte *buf, |
9b409511 | 1446 | ULONGEST offset, LONGEST len, ULONGEST *xfered_len) |
1e3ff5ad | 1447 | { |
9b409511 YQ |
1448 | return target_xfer_partial (ops, object, annex, NULL, buf, offset, len, |
1449 | xfered_len); | |
1e3ff5ad AC |
1450 | } |
1451 | ||
1452 | /* Wrappers to perform the full transfer. */ | |
7f79c47e DE |
1453 | |
1454 | /* For docs on target_read see target.h. */ | |
1455 | ||
1e3ff5ad AC |
1456 | LONGEST |
1457 | target_read (struct target_ops *ops, | |
1458 | enum target_object object, | |
1b0ba102 | 1459 | const char *annex, gdb_byte *buf, |
1e3ff5ad AC |
1460 | ULONGEST offset, LONGEST len) |
1461 | { | |
1462 | LONGEST xfered = 0; | |
5d502164 | 1463 | |
1e3ff5ad AC |
1464 | while (xfered < len) |
1465 | { | |
9b409511 YQ |
1466 | ULONGEST xfered_len; |
1467 | enum target_xfer_status status; | |
1468 | ||
1469 | status = target_read_partial (ops, object, annex, | |
1470 | (gdb_byte *) buf + xfered, | |
1471 | offset + xfered, len - xfered, | |
1472 | &xfered_len); | |
5d502164 | 1473 | |
1e3ff5ad | 1474 | /* Call an observer, notifying them of the xfer progress? */ |
9b409511 | 1475 | if (status == TARGET_XFER_EOF) |
13547ab6 | 1476 | return xfered; |
9b409511 YQ |
1477 | else if (status == TARGET_XFER_OK) |
1478 | { | |
1479 | xfered += xfered_len; | |
1480 | QUIT; | |
1481 | } | |
1482 | else | |
0088c768 | 1483 | return -1; |
9b409511 | 1484 | |
1e3ff5ad AC |
1485 | } |
1486 | return len; | |
1487 | } | |
1488 | ||
f1a507a1 JB |
1489 | /* Assuming that the entire [begin, end) range of memory cannot be |
1490 | read, try to read whatever subrange is possible to read. | |
1491 | ||
1492 | The function returns, in RESULT, either zero or one memory block. | |
1493 | If there's a readable subrange at the beginning, it is completely | |
1494 | read and returned. Any further readable subrange will not be read. | |
1495 | Otherwise, if there's a readable subrange at the end, it will be | |
1496 | completely read and returned. Any readable subranges before it | |
1497 | (obviously, not starting at the beginning), will be ignored. In | |
1498 | other cases -- either no readable subrange, or readable subrange(s) | |
1499 | that is neither at the beginning, or end, nothing is returned. | |
1500 | ||
1501 | The purpose of this function is to handle a read across a boundary | |
1502 | of accessible memory in a case when memory map is not available. | |
1503 | The above restrictions are fine for this case, but will give | |
1504 | incorrect results if the memory is 'patchy'. However, supporting | |
1505 | 'patchy' memory would require trying to read every single byte, | |
1506 | and it seems unacceptable solution. Explicit memory map is | |
1507 | recommended for this case -- and target_read_memory_robust will | |
1508 | take care of reading multiple ranges then. */ | |
8dedea02 VP |
1509 | |
1510 | static void | |
3e43a32a MS |
1511 | read_whatever_is_readable (struct target_ops *ops, |
1512 | ULONGEST begin, ULONGEST end, | |
8dedea02 | 1513 | VEC(memory_read_result_s) **result) |
d5086790 | 1514 | { |
f1a507a1 | 1515 | gdb_byte *buf = xmalloc (end - begin); |
8dedea02 VP |
1516 | ULONGEST current_begin = begin; |
1517 | ULONGEST current_end = end; | |
1518 | int forward; | |
1519 | memory_read_result_s r; | |
9b409511 | 1520 | ULONGEST xfered_len; |
8dedea02 VP |
1521 | |
1522 | /* If we previously failed to read 1 byte, nothing can be done here. */ | |
1523 | if (end - begin <= 1) | |
13b3fd9b MS |
1524 | { |
1525 | xfree (buf); | |
1526 | return; | |
1527 | } | |
8dedea02 VP |
1528 | |
1529 | /* Check that either first or the last byte is readable, and give up | |
c378eb4e | 1530 | if not. This heuristic is meant to permit reading accessible memory |
8dedea02 VP |
1531 | at the boundary of accessible region. */ |
1532 | if (target_read_partial (ops, TARGET_OBJECT_MEMORY, NULL, | |
9b409511 | 1533 | buf, begin, 1, &xfered_len) == TARGET_XFER_OK) |
8dedea02 VP |
1534 | { |
1535 | forward = 1; | |
1536 | ++current_begin; | |
1537 | } | |
1538 | else if (target_read_partial (ops, TARGET_OBJECT_MEMORY, NULL, | |
9b409511 YQ |
1539 | buf + (end-begin) - 1, end - 1, 1, |
1540 | &xfered_len) == TARGET_XFER_OK) | |
8dedea02 VP |
1541 | { |
1542 | forward = 0; | |
1543 | --current_end; | |
1544 | } | |
1545 | else | |
1546 | { | |
13b3fd9b | 1547 | xfree (buf); |
8dedea02 VP |
1548 | return; |
1549 | } | |
1550 | ||
1551 | /* Loop invariant is that the [current_begin, current_end) was previously | |
1552 | found to be not readable as a whole. | |
1553 | ||
1554 | Note loop condition -- if the range has 1 byte, we can't divide the range | |
1555 | so there's no point trying further. */ | |
1556 | while (current_end - current_begin > 1) | |
1557 | { | |
1558 | ULONGEST first_half_begin, first_half_end; | |
1559 | ULONGEST second_half_begin, second_half_end; | |
1560 | LONGEST xfer; | |
8dedea02 | 1561 | ULONGEST middle = current_begin + (current_end - current_begin)/2; |
f1a507a1 | 1562 | |
8dedea02 VP |
1563 | if (forward) |
1564 | { | |
1565 | first_half_begin = current_begin; | |
1566 | first_half_end = middle; | |
1567 | second_half_begin = middle; | |
1568 | second_half_end = current_end; | |
1569 | } | |
1570 | else | |
1571 | { | |
1572 | first_half_begin = middle; | |
1573 | first_half_end = current_end; | |
1574 | second_half_begin = current_begin; | |
1575 | second_half_end = middle; | |
1576 | } | |
1577 | ||
1578 | xfer = target_read (ops, TARGET_OBJECT_MEMORY, NULL, | |
1579 | buf + (first_half_begin - begin), | |
1580 | first_half_begin, | |
1581 | first_half_end - first_half_begin); | |
1582 | ||
1583 | if (xfer == first_half_end - first_half_begin) | |
1584 | { | |
c378eb4e | 1585 | /* This half reads up fine. So, the error must be in the |
3e43a32a | 1586 | other half. */ |
8dedea02 VP |
1587 | current_begin = second_half_begin; |
1588 | current_end = second_half_end; | |
1589 | } | |
1590 | else | |
1591 | { | |
c378eb4e MS |
1592 | /* This half is not readable. Because we've tried one byte, we |
1593 | know some part of this half if actually redable. Go to the next | |
8dedea02 VP |
1594 | iteration to divide again and try to read. |
1595 | ||
1596 | We don't handle the other half, because this function only tries | |
1597 | to read a single readable subrange. */ | |
1598 | current_begin = first_half_begin; | |
1599 | current_end = first_half_end; | |
1600 | } | |
1601 | } | |
1602 | ||
1603 | if (forward) | |
1604 | { | |
1605 | /* The [begin, current_begin) range has been read. */ | |
1606 | r.begin = begin; | |
1607 | r.end = current_begin; | |
1608 | r.data = buf; | |
1609 | } | |
1610 | else | |
1611 | { | |
1612 | /* The [current_end, end) range has been read. */ | |
1613 | LONGEST rlen = end - current_end; | |
f1a507a1 | 1614 | |
8dedea02 VP |
1615 | r.data = xmalloc (rlen); |
1616 | memcpy (r.data, buf + current_end - begin, rlen); | |
1617 | r.begin = current_end; | |
1618 | r.end = end; | |
1619 | xfree (buf); | |
1620 | } | |
1621 | VEC_safe_push(memory_read_result_s, (*result), &r); | |
1622 | } | |
1623 | ||
1624 | void | |
1625 | free_memory_read_result_vector (void *x) | |
1626 | { | |
1627 | VEC(memory_read_result_s) *v = x; | |
1628 | memory_read_result_s *current; | |
1629 | int ix; | |
1630 | ||
1631 | for (ix = 0; VEC_iterate (memory_read_result_s, v, ix, current); ++ix) | |
1632 | { | |
1633 | xfree (current->data); | |
1634 | } | |
1635 | VEC_free (memory_read_result_s, v); | |
1636 | } | |
1637 | ||
1638 | VEC(memory_read_result_s) * | |
1639 | read_memory_robust (struct target_ops *ops, ULONGEST offset, LONGEST len) | |
1640 | { | |
1641 | VEC(memory_read_result_s) *result = 0; | |
1642 | ||
1643 | LONGEST xfered = 0; | |
d5086790 VP |
1644 | while (xfered < len) |
1645 | { | |
8dedea02 VP |
1646 | struct mem_region *region = lookup_mem_region (offset + xfered); |
1647 | LONGEST rlen; | |
5d502164 | 1648 | |
8dedea02 VP |
1649 | /* If there is no explicit region, a fake one should be created. */ |
1650 | gdb_assert (region); | |
1651 | ||
1652 | if (region->hi == 0) | |
1653 | rlen = len - xfered; | |
1654 | else | |
1655 | rlen = region->hi - offset; | |
1656 | ||
1657 | if (region->attrib.mode == MEM_NONE || region->attrib.mode == MEM_WO) | |
d5086790 | 1658 | { |
c378eb4e | 1659 | /* Cannot read this region. Note that we can end up here only |
8dedea02 VP |
1660 | if the region is explicitly marked inaccessible, or |
1661 | 'inaccessible-by-default' is in effect. */ | |
1662 | xfered += rlen; | |
1663 | } | |
1664 | else | |
1665 | { | |
1666 | LONGEST to_read = min (len - xfered, rlen); | |
1667 | gdb_byte *buffer = (gdb_byte *)xmalloc (to_read); | |
1668 | ||
1669 | LONGEST xfer = target_read (ops, TARGET_OBJECT_MEMORY, NULL, | |
1670 | (gdb_byte *) buffer, | |
1671 | offset + xfered, to_read); | |
1672 | /* Call an observer, notifying them of the xfer progress? */ | |
d5086790 | 1673 | if (xfer <= 0) |
d5086790 | 1674 | { |
c378eb4e | 1675 | /* Got an error reading full chunk. See if maybe we can read |
8dedea02 VP |
1676 | some subrange. */ |
1677 | xfree (buffer); | |
3e43a32a MS |
1678 | read_whatever_is_readable (ops, offset + xfered, |
1679 | offset + xfered + to_read, &result); | |
8dedea02 | 1680 | xfered += to_read; |
d5086790 | 1681 | } |
8dedea02 VP |
1682 | else |
1683 | { | |
1684 | struct memory_read_result r; | |
1685 | r.data = buffer; | |
1686 | r.begin = offset + xfered; | |
1687 | r.end = r.begin + xfer; | |
1688 | VEC_safe_push (memory_read_result_s, result, &r); | |
1689 | xfered += xfer; | |
1690 | } | |
1691 | QUIT; | |
d5086790 | 1692 | } |
d5086790 | 1693 | } |
8dedea02 | 1694 | return result; |
d5086790 VP |
1695 | } |
1696 | ||
8dedea02 | 1697 | |
cf7a04e8 DJ |
1698 | /* An alternative to target_write with progress callbacks. */ |
1699 | ||
1e3ff5ad | 1700 | LONGEST |
cf7a04e8 DJ |
1701 | target_write_with_progress (struct target_ops *ops, |
1702 | enum target_object object, | |
1703 | const char *annex, const gdb_byte *buf, | |
1704 | ULONGEST offset, LONGEST len, | |
1705 | void (*progress) (ULONGEST, void *), void *baton) | |
1e3ff5ad AC |
1706 | { |
1707 | LONGEST xfered = 0; | |
a76d924d DJ |
1708 | |
1709 | /* Give the progress callback a chance to set up. */ | |
1710 | if (progress) | |
1711 | (*progress) (0, baton); | |
1712 | ||
1e3ff5ad AC |
1713 | while (xfered < len) |
1714 | { | |
9b409511 YQ |
1715 | ULONGEST xfered_len; |
1716 | enum target_xfer_status status; | |
1717 | ||
1718 | status = target_write_partial (ops, object, annex, | |
1719 | (gdb_byte *) buf + xfered, | |
1720 | offset + xfered, len - xfered, | |
1721 | &xfered_len); | |
cf7a04e8 | 1722 | |
5c328c05 YQ |
1723 | if (status != TARGET_XFER_OK) |
1724 | return status == TARGET_XFER_EOF ? xfered : -1; | |
cf7a04e8 DJ |
1725 | |
1726 | if (progress) | |
9b409511 | 1727 | (*progress) (xfered_len, baton); |
cf7a04e8 | 1728 | |
9b409511 | 1729 | xfered += xfered_len; |
1e3ff5ad AC |
1730 | QUIT; |
1731 | } | |
1732 | return len; | |
1733 | } | |
1734 | ||
7f79c47e DE |
1735 | /* For docs on target_write see target.h. */ |
1736 | ||
cf7a04e8 DJ |
1737 | LONGEST |
1738 | target_write (struct target_ops *ops, | |
1739 | enum target_object object, | |
1740 | const char *annex, const gdb_byte *buf, | |
1741 | ULONGEST offset, LONGEST len) | |
1742 | { | |
1743 | return target_write_with_progress (ops, object, annex, buf, offset, len, | |
1744 | NULL, NULL); | |
1745 | } | |
1746 | ||
159f81f3 DJ |
1747 | /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return |
1748 | the size of the transferred data. PADDING additional bytes are | |
1749 | available in *BUF_P. This is a helper function for | |
1750 | target_read_alloc; see the declaration of that function for more | |
1751 | information. */ | |
13547ab6 | 1752 | |
159f81f3 DJ |
1753 | static LONGEST |
1754 | target_read_alloc_1 (struct target_ops *ops, enum target_object object, | |
1755 | const char *annex, gdb_byte **buf_p, int padding) | |
13547ab6 DJ |
1756 | { |
1757 | size_t buf_alloc, buf_pos; | |
1758 | gdb_byte *buf; | |
13547ab6 DJ |
1759 | |
1760 | /* This function does not have a length parameter; it reads the | |
1761 | entire OBJECT). Also, it doesn't support objects fetched partly | |
1762 | from one target and partly from another (in a different stratum, | |
1763 | e.g. a core file and an executable). Both reasons make it | |
1764 | unsuitable for reading memory. */ | |
1765 | gdb_assert (object != TARGET_OBJECT_MEMORY); | |
1766 | ||
1767 | /* Start by reading up to 4K at a time. The target will throttle | |
1768 | this number down if necessary. */ | |
1769 | buf_alloc = 4096; | |
1770 | buf = xmalloc (buf_alloc); | |
1771 | buf_pos = 0; | |
1772 | while (1) | |
1773 | { | |
9b409511 YQ |
1774 | ULONGEST xfered_len; |
1775 | enum target_xfer_status status; | |
1776 | ||
1777 | status = target_read_partial (ops, object, annex, &buf[buf_pos], | |
1778 | buf_pos, buf_alloc - buf_pos - padding, | |
1779 | &xfered_len); | |
1780 | ||
1781 | if (status == TARGET_XFER_EOF) | |
13547ab6 DJ |
1782 | { |
1783 | /* Read all there was. */ | |
1784 | if (buf_pos == 0) | |
1785 | xfree (buf); | |
1786 | else | |
1787 | *buf_p = buf; | |
1788 | return buf_pos; | |
1789 | } | |
9b409511 YQ |
1790 | else if (status != TARGET_XFER_OK) |
1791 | { | |
1792 | /* An error occurred. */ | |
1793 | xfree (buf); | |
1794 | return TARGET_XFER_E_IO; | |
1795 | } | |
13547ab6 | 1796 | |
9b409511 | 1797 | buf_pos += xfered_len; |
13547ab6 DJ |
1798 | |
1799 | /* If the buffer is filling up, expand it. */ | |
1800 | if (buf_alloc < buf_pos * 2) | |
1801 | { | |
1802 | buf_alloc *= 2; | |
1803 | buf = xrealloc (buf, buf_alloc); | |
1804 | } | |
1805 | ||
1806 | QUIT; | |
1807 | } | |
1808 | } | |
1809 | ||
159f81f3 DJ |
1810 | /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return |
1811 | the size of the transferred data. See the declaration in "target.h" | |
1812 | function for more information about the return value. */ | |
1813 | ||
1814 | LONGEST | |
1815 | target_read_alloc (struct target_ops *ops, enum target_object object, | |
1816 | const char *annex, gdb_byte **buf_p) | |
1817 | { | |
1818 | return target_read_alloc_1 (ops, object, annex, buf_p, 0); | |
1819 | } | |
1820 | ||
1821 | /* Read OBJECT/ANNEX using OPS. The result is NUL-terminated and | |
1822 | returned as a string, allocated using xmalloc. If an error occurs | |
1823 | or the transfer is unsupported, NULL is returned. Empty objects | |
1824 | are returned as allocated but empty strings. A warning is issued | |
1825 | if the result contains any embedded NUL bytes. */ | |
1826 | ||
1827 | char * | |
1828 | target_read_stralloc (struct target_ops *ops, enum target_object object, | |
1829 | const char *annex) | |
1830 | { | |
39086a0e PA |
1831 | gdb_byte *buffer; |
1832 | char *bufstr; | |
7313baad | 1833 | LONGEST i, transferred; |
159f81f3 | 1834 | |
39086a0e PA |
1835 | transferred = target_read_alloc_1 (ops, object, annex, &buffer, 1); |
1836 | bufstr = (char *) buffer; | |
159f81f3 DJ |
1837 | |
1838 | if (transferred < 0) | |
1839 | return NULL; | |
1840 | ||
1841 | if (transferred == 0) | |
1842 | return xstrdup (""); | |
1843 | ||
39086a0e | 1844 | bufstr[transferred] = 0; |
7313baad UW |
1845 | |
1846 | /* Check for embedded NUL bytes; but allow trailing NULs. */ | |
39086a0e PA |
1847 | for (i = strlen (bufstr); i < transferred; i++) |
1848 | if (bufstr[i] != 0) | |
7313baad UW |
1849 | { |
1850 | warning (_("target object %d, annex %s, " | |
1851 | "contained unexpected null characters"), | |
1852 | (int) object, annex ? annex : "(none)"); | |
1853 | break; | |
1854 | } | |
159f81f3 | 1855 | |
39086a0e | 1856 | return bufstr; |
159f81f3 DJ |
1857 | } |
1858 | ||
b6591e8b AC |
1859 | /* Memory transfer methods. */ |
1860 | ||
1861 | void | |
1b0ba102 | 1862 | get_target_memory (struct target_ops *ops, CORE_ADDR addr, gdb_byte *buf, |
b6591e8b AC |
1863 | LONGEST len) |
1864 | { | |
07b82ea5 PA |
1865 | /* This method is used to read from an alternate, non-current |
1866 | target. This read must bypass the overlay support (as symbols | |
1867 | don't match this target), and GDB's internal cache (wrong cache | |
1868 | for this target). */ | |
1869 | if (target_read (ops, TARGET_OBJECT_RAW_MEMORY, NULL, buf, addr, len) | |
b6591e8b | 1870 | != len) |
578d3588 | 1871 | memory_error (TARGET_XFER_E_IO, addr); |
b6591e8b AC |
1872 | } |
1873 | ||
1874 | ULONGEST | |
5d502164 MS |
1875 | get_target_memory_unsigned (struct target_ops *ops, CORE_ADDR addr, |
1876 | int len, enum bfd_endian byte_order) | |
b6591e8b | 1877 | { |
f6519ebc | 1878 | gdb_byte buf[sizeof (ULONGEST)]; |
b6591e8b AC |
1879 | |
1880 | gdb_assert (len <= sizeof (buf)); | |
1881 | get_target_memory (ops, addr, buf, len); | |
e17a4113 | 1882 | return extract_unsigned_integer (buf, len, byte_order); |
b6591e8b AC |
1883 | } |
1884 | ||
3db08215 MM |
1885 | /* See target.h. */ |
1886 | ||
d914c394 SS |
1887 | int |
1888 | target_insert_breakpoint (struct gdbarch *gdbarch, | |
1889 | struct bp_target_info *bp_tgt) | |
1890 | { | |
1891 | if (!may_insert_breakpoints) | |
1892 | { | |
1893 | warning (_("May not insert breakpoints")); | |
1894 | return 1; | |
1895 | } | |
1896 | ||
6b84065d TT |
1897 | return current_target.to_insert_breakpoint (¤t_target, |
1898 | gdbarch, bp_tgt); | |
d914c394 SS |
1899 | } |
1900 | ||
3db08215 MM |
1901 | /* See target.h. */ |
1902 | ||
d914c394 | 1903 | int |
6b84065d TT |
1904 | target_remove_breakpoint (struct gdbarch *gdbarch, |
1905 | struct bp_target_info *bp_tgt) | |
d914c394 SS |
1906 | { |
1907 | /* This is kind of a weird case to handle, but the permission might | |
1908 | have been changed after breakpoints were inserted - in which case | |
1909 | we should just take the user literally and assume that any | |
1910 | breakpoints should be left in place. */ | |
1911 | if (!may_insert_breakpoints) | |
1912 | { | |
1913 | warning (_("May not remove breakpoints")); | |
1914 | return 1; | |
1915 | } | |
1916 | ||
6b84065d TT |
1917 | return current_target.to_remove_breakpoint (¤t_target, |
1918 | gdbarch, bp_tgt); | |
d914c394 SS |
1919 | } |
1920 | ||
c906108c | 1921 | static void |
fba45db2 | 1922 | target_info (char *args, int from_tty) |
c906108c SS |
1923 | { |
1924 | struct target_ops *t; | |
c906108c | 1925 | int has_all_mem = 0; |
c5aa993b | 1926 | |
c906108c | 1927 | if (symfile_objfile != NULL) |
4262abfb JK |
1928 | printf_unfiltered (_("Symbols from \"%s\".\n"), |
1929 | objfile_name (symfile_objfile)); | |
c906108c | 1930 | |
258b763a | 1931 | for (t = target_stack; t != NULL; t = t->beneath) |
c906108c | 1932 | { |
c35b1492 | 1933 | if (!(*t->to_has_memory) (t)) |
c906108c SS |
1934 | continue; |
1935 | ||
c5aa993b | 1936 | if ((int) (t->to_stratum) <= (int) dummy_stratum) |
c906108c SS |
1937 | continue; |
1938 | if (has_all_mem) | |
3e43a32a MS |
1939 | printf_unfiltered (_("\tWhile running this, " |
1940 | "GDB does not access memory from...\n")); | |
c5aa993b JM |
1941 | printf_unfiltered ("%s:\n", t->to_longname); |
1942 | (t->to_files_info) (t); | |
c35b1492 | 1943 | has_all_mem = (*t->to_has_all_memory) (t); |
c906108c SS |
1944 | } |
1945 | } | |
1946 | ||
fd79ecee DJ |
1947 | /* This function is called before any new inferior is created, e.g. |
1948 | by running a program, attaching, or connecting to a target. | |
1949 | It cleans up any state from previous invocations which might | |
1950 | change between runs. This is a subset of what target_preopen | |
1951 | resets (things which might change between targets). */ | |
1952 | ||
1953 | void | |
1954 | target_pre_inferior (int from_tty) | |
1955 | { | |
c378eb4e | 1956 | /* Clear out solib state. Otherwise the solib state of the previous |
b9db4ced | 1957 | inferior might have survived and is entirely wrong for the new |
c378eb4e | 1958 | target. This has been observed on GNU/Linux using glibc 2.3. How |
b9db4ced UW |
1959 | to reproduce: |
1960 | ||
1961 | bash$ ./foo& | |
1962 | [1] 4711 | |
1963 | bash$ ./foo& | |
1964 | [1] 4712 | |
1965 | bash$ gdb ./foo | |
1966 | [...] | |
1967 | (gdb) attach 4711 | |
1968 | (gdb) detach | |
1969 | (gdb) attach 4712 | |
1970 | Cannot access memory at address 0xdeadbeef | |
1971 | */ | |
b9db4ced | 1972 | |
50c71eaf PA |
1973 | /* In some OSs, the shared library list is the same/global/shared |
1974 | across inferiors. If code is shared between processes, so are | |
1975 | memory regions and features. */ | |
f5656ead | 1976 | if (!gdbarch_has_global_solist (target_gdbarch ())) |
50c71eaf PA |
1977 | { |
1978 | no_shared_libraries (NULL, from_tty); | |
1979 | ||
1980 | invalidate_target_mem_regions (); | |
424163ea | 1981 | |
50c71eaf PA |
1982 | target_clear_description (); |
1983 | } | |
8ffcbaaf YQ |
1984 | |
1985 | agent_capability_invalidate (); | |
fd79ecee DJ |
1986 | } |
1987 | ||
b8fa0bfa PA |
1988 | /* Callback for iterate_over_inferiors. Gets rid of the given |
1989 | inferior. */ | |
1990 | ||
1991 | static int | |
1992 | dispose_inferior (struct inferior *inf, void *args) | |
1993 | { | |
1994 | struct thread_info *thread; | |
1995 | ||
1996 | thread = any_thread_of_process (inf->pid); | |
1997 | if (thread) | |
1998 | { | |
1999 | switch_to_thread (thread->ptid); | |
2000 | ||
2001 | /* Core inferiors actually should be detached, not killed. */ | |
2002 | if (target_has_execution) | |
2003 | target_kill (); | |
2004 | else | |
2005 | target_detach (NULL, 0); | |
2006 | } | |
2007 | ||
2008 | return 0; | |
2009 | } | |
2010 | ||
c906108c SS |
2011 | /* This is to be called by the open routine before it does |
2012 | anything. */ | |
2013 | ||
2014 | void | |
fba45db2 | 2015 | target_preopen (int from_tty) |
c906108c | 2016 | { |
c5aa993b | 2017 | dont_repeat (); |
c906108c | 2018 | |
b8fa0bfa | 2019 | if (have_inferiors ()) |
c5aa993b | 2020 | { |
adf40b2e | 2021 | if (!from_tty |
b8fa0bfa PA |
2022 | || !have_live_inferiors () |
2023 | || query (_("A program is being debugged already. Kill it? "))) | |
2024 | iterate_over_inferiors (dispose_inferior, NULL); | |
c906108c | 2025 | else |
8a3fe4f8 | 2026 | error (_("Program not killed.")); |
c906108c SS |
2027 | } |
2028 | ||
2029 | /* Calling target_kill may remove the target from the stack. But if | |
2030 | it doesn't (which seems like a win for UDI), remove it now. */ | |
87ab71f0 PA |
2031 | /* Leave the exec target, though. The user may be switching from a |
2032 | live process to a core of the same program. */ | |
460014f5 | 2033 | pop_all_targets_above (file_stratum); |
fd79ecee DJ |
2034 | |
2035 | target_pre_inferior (from_tty); | |
c906108c SS |
2036 | } |
2037 | ||
2038 | /* Detach a target after doing deferred register stores. */ | |
2039 | ||
2040 | void | |
52554a0e | 2041 | target_detach (const char *args, int from_tty) |
c906108c | 2042 | { |
136d6dae VP |
2043 | struct target_ops* t; |
2044 | ||
f5656ead | 2045 | if (gdbarch_has_global_breakpoints (target_gdbarch ())) |
50c71eaf PA |
2046 | /* Don't remove global breakpoints here. They're removed on |
2047 | disconnection from the target. */ | |
2048 | ; | |
2049 | else | |
2050 | /* If we're in breakpoints-always-inserted mode, have to remove | |
2051 | them before detaching. */ | |
dfd4cc63 | 2052 | remove_breakpoints_pid (ptid_get_pid (inferior_ptid)); |
74960c60 | 2053 | |
24291992 PA |
2054 | prepare_for_detach (); |
2055 | ||
09da0d0a | 2056 | current_target.to_detach (¤t_target, args, from_tty); |
c906108c SS |
2057 | } |
2058 | ||
6ad8ae5c | 2059 | void |
fee354ee | 2060 | target_disconnect (const char *args, int from_tty) |
6ad8ae5c | 2061 | { |
50c71eaf PA |
2062 | /* If we're in breakpoints-always-inserted mode or if breakpoints |
2063 | are global across processes, we have to remove them before | |
2064 | disconnecting. */ | |
74960c60 VP |
2065 | remove_breakpoints (); |
2066 | ||
86a0854a | 2067 | current_target.to_disconnect (¤t_target, args, from_tty); |
6ad8ae5c DJ |
2068 | } |
2069 | ||
117de6a9 | 2070 | ptid_t |
47608cb1 | 2071 | target_wait (ptid_t ptid, struct target_waitstatus *status, int options) |
117de6a9 | 2072 | { |
a7068b60 | 2073 | return (current_target.to_wait) (¤t_target, ptid, status, options); |
117de6a9 PA |
2074 | } |
2075 | ||
2076 | char * | |
2077 | target_pid_to_str (ptid_t ptid) | |
2078 | { | |
770234d3 | 2079 | return (*current_target.to_pid_to_str) (¤t_target, ptid); |
117de6a9 PA |
2080 | } |
2081 | ||
4694da01 TT |
2082 | char * |
2083 | target_thread_name (struct thread_info *info) | |
2084 | { | |
825828fc | 2085 | return current_target.to_thread_name (¤t_target, info); |
4694da01 TT |
2086 | } |
2087 | ||
e1ac3328 | 2088 | void |
2ea28649 | 2089 | target_resume (ptid_t ptid, int step, enum gdb_signal signal) |
e1ac3328 | 2090 | { |
28439f5e PA |
2091 | struct target_ops *t; |
2092 | ||
4e5d721f | 2093 | target_dcache_invalidate (); |
28439f5e | 2094 | |
6b84065d | 2095 | current_target.to_resume (¤t_target, ptid, step, signal); |
28439f5e | 2096 | |
6b84065d | 2097 | registers_changed_ptid (ptid); |
251bde03 PA |
2098 | /* We only set the internal executing state here. The user/frontend |
2099 | running state is set at a higher level. */ | |
6b84065d | 2100 | set_executing (ptid, 1); |
6b84065d | 2101 | clear_inline_frame_state (ptid); |
e1ac3328 | 2102 | } |
2455069d UW |
2103 | |
2104 | void | |
2105 | target_pass_signals (int numsigs, unsigned char *pass_signals) | |
2106 | { | |
035cad7f | 2107 | (*current_target.to_pass_signals) (¤t_target, numsigs, pass_signals); |
2455069d UW |
2108 | } |
2109 | ||
9b224c5e PA |
2110 | void |
2111 | target_program_signals (int numsigs, unsigned char *program_signals) | |
2112 | { | |
7d4f8efa TT |
2113 | (*current_target.to_program_signals) (¤t_target, |
2114 | numsigs, program_signals); | |
9b224c5e PA |
2115 | } |
2116 | ||
098dba18 TT |
2117 | static int |
2118 | default_follow_fork (struct target_ops *self, int follow_child, | |
2119 | int detach_fork) | |
2120 | { | |
2121 | /* Some target returned a fork event, but did not know how to follow it. */ | |
2122 | internal_error (__FILE__, __LINE__, | |
2123 | _("could not find a target to follow fork")); | |
2124 | } | |
2125 | ||
ee057212 DJ |
2126 | /* Look through the list of possible targets for a target that can |
2127 | follow forks. */ | |
2128 | ||
2129 | int | |
07107ca6 | 2130 | target_follow_fork (int follow_child, int detach_fork) |
ee057212 | 2131 | { |
a7068b60 TT |
2132 | return current_target.to_follow_fork (¤t_target, |
2133 | follow_child, detach_fork); | |
ee057212 DJ |
2134 | } |
2135 | ||
8d657035 TT |
2136 | static void |
2137 | default_mourn_inferior (struct target_ops *self) | |
2138 | { | |
2139 | internal_error (__FILE__, __LINE__, | |
2140 | _("could not find a target to follow mourn inferior")); | |
2141 | } | |
2142 | ||
136d6dae VP |
2143 | void |
2144 | target_mourn_inferior (void) | |
2145 | { | |
8d657035 | 2146 | current_target.to_mourn_inferior (¤t_target); |
136d6dae | 2147 | |
8d657035 TT |
2148 | /* We no longer need to keep handles on any of the object files. |
2149 | Make sure to release them to avoid unnecessarily locking any | |
2150 | of them while we're not actually debugging. */ | |
2151 | bfd_cache_close_all (); | |
136d6dae VP |
2152 | } |
2153 | ||
424163ea DJ |
2154 | /* Look for a target which can describe architectural features, starting |
2155 | from TARGET. If we find one, return its description. */ | |
2156 | ||
2157 | const struct target_desc * | |
2158 | target_read_description (struct target_ops *target) | |
2159 | { | |
2117c711 | 2160 | return target->to_read_description (target); |
424163ea DJ |
2161 | } |
2162 | ||
58a5184e | 2163 | /* This implements a basic search of memory, reading target memory and |
08388c79 DE |
2164 | performing the search here (as opposed to performing the search in on the |
2165 | target side with, for example, gdbserver). */ | |
2166 | ||
2167 | int | |
2168 | simple_search_memory (struct target_ops *ops, | |
2169 | CORE_ADDR start_addr, ULONGEST search_space_len, | |
2170 | const gdb_byte *pattern, ULONGEST pattern_len, | |
2171 | CORE_ADDR *found_addrp) | |
2172 | { | |
2173 | /* NOTE: also defined in find.c testcase. */ | |
2174 | #define SEARCH_CHUNK_SIZE 16000 | |
2175 | const unsigned chunk_size = SEARCH_CHUNK_SIZE; | |
2176 | /* Buffer to hold memory contents for searching. */ | |
2177 | gdb_byte *search_buf; | |
2178 | unsigned search_buf_size; | |
2179 | struct cleanup *old_cleanups; | |
2180 | ||
2181 | search_buf_size = chunk_size + pattern_len - 1; | |
2182 | ||
2183 | /* No point in trying to allocate a buffer larger than the search space. */ | |
2184 | if (search_space_len < search_buf_size) | |
2185 | search_buf_size = search_space_len; | |
2186 | ||
2187 | search_buf = malloc (search_buf_size); | |
2188 | if (search_buf == NULL) | |
5e1471f5 | 2189 | error (_("Unable to allocate memory to perform the search.")); |
08388c79 DE |
2190 | old_cleanups = make_cleanup (free_current_contents, &search_buf); |
2191 | ||
2192 | /* Prime the search buffer. */ | |
2193 | ||
2194 | if (target_read (ops, TARGET_OBJECT_MEMORY, NULL, | |
2195 | search_buf, start_addr, search_buf_size) != search_buf_size) | |
2196 | { | |
b3dc46ff AB |
2197 | warning (_("Unable to access %s bytes of target " |
2198 | "memory at %s, halting search."), | |
2199 | pulongest (search_buf_size), hex_string (start_addr)); | |
08388c79 DE |
2200 | do_cleanups (old_cleanups); |
2201 | return -1; | |
2202 | } | |
2203 | ||
2204 | /* Perform the search. | |
2205 | ||
2206 | The loop is kept simple by allocating [N + pattern-length - 1] bytes. | |
2207 | When we've scanned N bytes we copy the trailing bytes to the start and | |
2208 | read in another N bytes. */ | |
2209 | ||
2210 | while (search_space_len >= pattern_len) | |
2211 | { | |
2212 | gdb_byte *found_ptr; | |
2213 | unsigned nr_search_bytes = min (search_space_len, search_buf_size); | |
2214 | ||
2215 | found_ptr = memmem (search_buf, nr_search_bytes, | |
2216 | pattern, pattern_len); | |
2217 | ||
2218 | if (found_ptr != NULL) | |
2219 | { | |
2220 | CORE_ADDR found_addr = start_addr + (found_ptr - search_buf); | |
5d502164 | 2221 | |
08388c79 DE |
2222 | *found_addrp = found_addr; |
2223 | do_cleanups (old_cleanups); | |
2224 | return 1; | |
2225 | } | |
2226 | ||
2227 | /* Not found in this chunk, skip to next chunk. */ | |
2228 | ||
2229 | /* Don't let search_space_len wrap here, it's unsigned. */ | |
2230 | if (search_space_len >= chunk_size) | |
2231 | search_space_len -= chunk_size; | |
2232 | else | |
2233 | search_space_len = 0; | |
2234 | ||
2235 | if (search_space_len >= pattern_len) | |
2236 | { | |
2237 | unsigned keep_len = search_buf_size - chunk_size; | |
8a35fb51 | 2238 | CORE_ADDR read_addr = start_addr + chunk_size + keep_len; |
08388c79 DE |
2239 | int nr_to_read; |
2240 | ||
2241 | /* Copy the trailing part of the previous iteration to the front | |
2242 | of the buffer for the next iteration. */ | |
2243 | gdb_assert (keep_len == pattern_len - 1); | |
2244 | memcpy (search_buf, search_buf + chunk_size, keep_len); | |
2245 | ||
2246 | nr_to_read = min (search_space_len - keep_len, chunk_size); | |
2247 | ||
2248 | if (target_read (ops, TARGET_OBJECT_MEMORY, NULL, | |
2249 | search_buf + keep_len, read_addr, | |
2250 | nr_to_read) != nr_to_read) | |
2251 | { | |
b3dc46ff | 2252 | warning (_("Unable to access %s bytes of target " |
9b20d036 | 2253 | "memory at %s, halting search."), |
b3dc46ff | 2254 | plongest (nr_to_read), |
08388c79 DE |
2255 | hex_string (read_addr)); |
2256 | do_cleanups (old_cleanups); | |
2257 | return -1; | |
2258 | } | |
2259 | ||
2260 | start_addr += chunk_size; | |
2261 | } | |
2262 | } | |
2263 | ||
2264 | /* Not found. */ | |
2265 | ||
2266 | do_cleanups (old_cleanups); | |
2267 | return 0; | |
2268 | } | |
2269 | ||
58a5184e TT |
2270 | /* Default implementation of memory-searching. */ |
2271 | ||
2272 | static int | |
2273 | default_search_memory (struct target_ops *self, | |
2274 | CORE_ADDR start_addr, ULONGEST search_space_len, | |
2275 | const gdb_byte *pattern, ULONGEST pattern_len, | |
2276 | CORE_ADDR *found_addrp) | |
2277 | { | |
2278 | /* Start over from the top of the target stack. */ | |
2279 | return simple_search_memory (current_target.beneath, | |
2280 | start_addr, search_space_len, | |
2281 | pattern, pattern_len, found_addrp); | |
2282 | } | |
2283 | ||
08388c79 DE |
2284 | /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the |
2285 | sequence of bytes in PATTERN with length PATTERN_LEN. | |
2286 | ||
2287 | The result is 1 if found, 0 if not found, and -1 if there was an error | |
2288 | requiring halting of the search (e.g. memory read error). | |
2289 | If the pattern is found the address is recorded in FOUND_ADDRP. */ | |
2290 | ||
2291 | int | |
2292 | target_search_memory (CORE_ADDR start_addr, ULONGEST search_space_len, | |
2293 | const gdb_byte *pattern, ULONGEST pattern_len, | |
2294 | CORE_ADDR *found_addrp) | |
2295 | { | |
a7068b60 TT |
2296 | return current_target.to_search_memory (¤t_target, start_addr, |
2297 | search_space_len, | |
2298 | pattern, pattern_len, found_addrp); | |
08388c79 DE |
2299 | } |
2300 | ||
8edfe269 DJ |
2301 | /* Look through the currently pushed targets. If none of them will |
2302 | be able to restart the currently running process, issue an error | |
2303 | message. */ | |
2304 | ||
2305 | void | |
2306 | target_require_runnable (void) | |
2307 | { | |
2308 | struct target_ops *t; | |
2309 | ||
2310 | for (t = target_stack; t != NULL; t = t->beneath) | |
2311 | { | |
2312 | /* If this target knows how to create a new program, then | |
2313 | assume we will still be able to after killing the current | |
2314 | one. Either killing and mourning will not pop T, or else | |
2315 | find_default_run_target will find it again. */ | |
2316 | if (t->to_create_inferior != NULL) | |
2317 | return; | |
2318 | ||
548740d6 | 2319 | /* Do not worry about targets at certain strata that can not |
8edfe269 DJ |
2320 | create inferiors. Assume they will be pushed again if |
2321 | necessary, and continue to the process_stratum. */ | |
85e747d2 | 2322 | if (t->to_stratum == thread_stratum |
548740d6 | 2323 | || t->to_stratum == record_stratum |
85e747d2 | 2324 | || t->to_stratum == arch_stratum) |
8edfe269 DJ |
2325 | continue; |
2326 | ||
3e43a32a MS |
2327 | error (_("The \"%s\" target does not support \"run\". " |
2328 | "Try \"help target\" or \"continue\"."), | |
8edfe269 DJ |
2329 | t->to_shortname); |
2330 | } | |
2331 | ||
2332 | /* This function is only called if the target is running. In that | |
2333 | case there should have been a process_stratum target and it | |
c378eb4e | 2334 | should either know how to create inferiors, or not... */ |
9b20d036 | 2335 | internal_error (__FILE__, __LINE__, _("No targets found")); |
8edfe269 DJ |
2336 | } |
2337 | ||
6a3cb8e8 PA |
2338 | /* Whether GDB is allowed to fall back to the default run target for |
2339 | "run", "attach", etc. when no target is connected yet. */ | |
2340 | static int auto_connect_native_target = 1; | |
2341 | ||
2342 | static void | |
2343 | show_auto_connect_native_target (struct ui_file *file, int from_tty, | |
2344 | struct cmd_list_element *c, const char *value) | |
2345 | { | |
2346 | fprintf_filtered (file, | |
2347 | _("Whether GDB may automatically connect to the " | |
2348 | "native target is %s.\n"), | |
2349 | value); | |
2350 | } | |
2351 | ||
c906108c SS |
2352 | /* Look through the list of possible targets for a target that can |
2353 | execute a run or attach command without any other data. This is | |
2354 | used to locate the default process stratum. | |
2355 | ||
5f667f2d PA |
2356 | If DO_MESG is not NULL, the result is always valid (error() is |
2357 | called for errors); else, return NULL on error. */ | |
c906108c SS |
2358 | |
2359 | static struct target_ops * | |
fba45db2 | 2360 | find_default_run_target (char *do_mesg) |
c906108c | 2361 | { |
c906108c | 2362 | struct target_ops *runable = NULL; |
c906108c | 2363 | |
6a3cb8e8 | 2364 | if (auto_connect_native_target) |
c906108c | 2365 | { |
89a1c21a | 2366 | struct target_ops *t; |
6a3cb8e8 | 2367 | int count = 0; |
89a1c21a | 2368 | int i; |
6a3cb8e8 | 2369 | |
89a1c21a | 2370 | for (i = 0; VEC_iterate (target_ops_p, target_structs, i, t); ++i) |
c906108c | 2371 | { |
89a1c21a | 2372 | if (t->to_can_run != delegate_can_run && target_can_run (t)) |
6a3cb8e8 | 2373 | { |
89a1c21a | 2374 | runable = t; |
6a3cb8e8 PA |
2375 | ++count; |
2376 | } | |
c906108c | 2377 | } |
6a3cb8e8 PA |
2378 | |
2379 | if (count != 1) | |
2380 | runable = NULL; | |
c906108c SS |
2381 | } |
2382 | ||
6a3cb8e8 | 2383 | if (runable == NULL) |
5f667f2d PA |
2384 | { |
2385 | if (do_mesg) | |
2386 | error (_("Don't know how to %s. Try \"help target\"."), do_mesg); | |
2387 | else | |
2388 | return NULL; | |
2389 | } | |
c906108c SS |
2390 | |
2391 | return runable; | |
2392 | } | |
2393 | ||
b3ccfe11 | 2394 | /* See target.h. */ |
c906108c | 2395 | |
b3ccfe11 TT |
2396 | struct target_ops * |
2397 | find_attach_target (void) | |
c906108c SS |
2398 | { |
2399 | struct target_ops *t; | |
2400 | ||
b3ccfe11 TT |
2401 | /* If a target on the current stack can attach, use it. */ |
2402 | for (t = current_target.beneath; t != NULL; t = t->beneath) | |
2403 | { | |
2404 | if (t->to_attach != NULL) | |
2405 | break; | |
2406 | } | |
c906108c | 2407 | |
b3ccfe11 TT |
2408 | /* Otherwise, use the default run target for attaching. */ |
2409 | if (t == NULL) | |
2410 | t = find_default_run_target ("attach"); | |
b84876c2 | 2411 | |
b3ccfe11 | 2412 | return t; |
b84876c2 PA |
2413 | } |
2414 | ||
b3ccfe11 | 2415 | /* See target.h. */ |
b84876c2 | 2416 | |
b3ccfe11 TT |
2417 | struct target_ops * |
2418 | find_run_target (void) | |
9908b566 VP |
2419 | { |
2420 | struct target_ops *t; | |
2421 | ||
b3ccfe11 TT |
2422 | /* If a target on the current stack can attach, use it. */ |
2423 | for (t = current_target.beneath; t != NULL; t = t->beneath) | |
2424 | { | |
2425 | if (t->to_create_inferior != NULL) | |
2426 | break; | |
2427 | } | |
5d502164 | 2428 | |
b3ccfe11 TT |
2429 | /* Otherwise, use the default run target. */ |
2430 | if (t == NULL) | |
2431 | t = find_default_run_target ("run"); | |
9908b566 | 2432 | |
b3ccfe11 | 2433 | return t; |
9908b566 VP |
2434 | } |
2435 | ||
145b16a9 UW |
2436 | /* Implement the "info proc" command. */ |
2437 | ||
451b7c33 | 2438 | int |
7bc112c1 | 2439 | target_info_proc (const char *args, enum info_proc_what what) |
145b16a9 UW |
2440 | { |
2441 | struct target_ops *t; | |
2442 | ||
2443 | /* If we're already connected to something that can get us OS | |
2444 | related data, use it. Otherwise, try using the native | |
2445 | target. */ | |
2446 | if (current_target.to_stratum >= process_stratum) | |
2447 | t = current_target.beneath; | |
2448 | else | |
2449 | t = find_default_run_target (NULL); | |
2450 | ||
2451 | for (; t != NULL; t = t->beneath) | |
2452 | { | |
2453 | if (t->to_info_proc != NULL) | |
2454 | { | |
2455 | t->to_info_proc (t, args, what); | |
2456 | ||
2457 | if (targetdebug) | |
2458 | fprintf_unfiltered (gdb_stdlog, | |
2459 | "target_info_proc (\"%s\", %d)\n", args, what); | |
2460 | ||
451b7c33 | 2461 | return 1; |
145b16a9 UW |
2462 | } |
2463 | } | |
2464 | ||
451b7c33 | 2465 | return 0; |
145b16a9 UW |
2466 | } |
2467 | ||
03583c20 | 2468 | static int |
2bfc0540 | 2469 | find_default_supports_disable_randomization (struct target_ops *self) |
03583c20 UW |
2470 | { |
2471 | struct target_ops *t; | |
2472 | ||
2473 | t = find_default_run_target (NULL); | |
2474 | if (t && t->to_supports_disable_randomization) | |
2bfc0540 | 2475 | return (t->to_supports_disable_randomization) (t); |
03583c20 UW |
2476 | return 0; |
2477 | } | |
2478 | ||
2479 | int | |
2480 | target_supports_disable_randomization (void) | |
2481 | { | |
2482 | struct target_ops *t; | |
2483 | ||
2484 | for (t = ¤t_target; t != NULL; t = t->beneath) | |
2485 | if (t->to_supports_disable_randomization) | |
2bfc0540 | 2486 | return t->to_supports_disable_randomization (t); |
03583c20 UW |
2487 | |
2488 | return 0; | |
2489 | } | |
9908b566 | 2490 | |
07e059b5 VP |
2491 | char * |
2492 | target_get_osdata (const char *type) | |
2493 | { | |
07e059b5 VP |
2494 | struct target_ops *t; |
2495 | ||
739ef7fb PA |
2496 | /* If we're already connected to something that can get us OS |
2497 | related data, use it. Otherwise, try using the native | |
2498 | target. */ | |
2499 | if (current_target.to_stratum >= process_stratum) | |
6d097e65 | 2500 | t = current_target.beneath; |
739ef7fb PA |
2501 | else |
2502 | t = find_default_run_target ("get OS data"); | |
07e059b5 VP |
2503 | |
2504 | if (!t) | |
2505 | return NULL; | |
2506 | ||
6d097e65 | 2507 | return target_read_stralloc (t, TARGET_OBJECT_OSDATA, type); |
07e059b5 VP |
2508 | } |
2509 | ||
8eaff7cd TT |
2510 | static struct address_space * |
2511 | default_thread_address_space (struct target_ops *self, ptid_t ptid) | |
6c95b8df PA |
2512 | { |
2513 | struct inferior *inf; | |
6c95b8df PA |
2514 | |
2515 | /* Fall-back to the "main" address space of the inferior. */ | |
2516 | inf = find_inferior_pid (ptid_get_pid (ptid)); | |
2517 | ||
2518 | if (inf == NULL || inf->aspace == NULL) | |
3e43a32a | 2519 | internal_error (__FILE__, __LINE__, |
9b20d036 MS |
2520 | _("Can't determine the current " |
2521 | "address space of thread %s\n"), | |
6c95b8df PA |
2522 | target_pid_to_str (ptid)); |
2523 | ||
2524 | return inf->aspace; | |
2525 | } | |
2526 | ||
8eaff7cd TT |
2527 | /* Determine the current address space of thread PTID. */ |
2528 | ||
2529 | struct address_space * | |
2530 | target_thread_address_space (ptid_t ptid) | |
2531 | { | |
2532 | struct address_space *aspace; | |
2533 | ||
2534 | aspace = current_target.to_thread_address_space (¤t_target, ptid); | |
2535 | gdb_assert (aspace != NULL); | |
2536 | ||
8eaff7cd TT |
2537 | return aspace; |
2538 | } | |
2539 | ||
7313baad UW |
2540 | |
2541 | /* Target file operations. */ | |
2542 | ||
2543 | static struct target_ops * | |
2544 | default_fileio_target (void) | |
2545 | { | |
2546 | /* If we're already connected to something that can perform | |
2547 | file I/O, use it. Otherwise, try using the native target. */ | |
2548 | if (current_target.to_stratum >= process_stratum) | |
2549 | return current_target.beneath; | |
2550 | else | |
2551 | return find_default_run_target ("file I/O"); | |
2552 | } | |
2553 | ||
2554 | /* Open FILENAME on the target, using FLAGS and MODE. Return a | |
2555 | target file descriptor, or -1 if an error occurs (and set | |
2556 | *TARGET_ERRNO). */ | |
2557 | int | |
2558 | target_fileio_open (const char *filename, int flags, int mode, | |
2559 | int *target_errno) | |
2560 | { | |
2561 | struct target_ops *t; | |
2562 | ||
2563 | for (t = default_fileio_target (); t != NULL; t = t->beneath) | |
2564 | { | |
2565 | if (t->to_fileio_open != NULL) | |
2566 | { | |
cd897586 | 2567 | int fd = t->to_fileio_open (t, filename, flags, mode, target_errno); |
7313baad UW |
2568 | |
2569 | if (targetdebug) | |
2570 | fprintf_unfiltered (gdb_stdlog, | |
2571 | "target_fileio_open (%s,0x%x,0%o) = %d (%d)\n", | |
2572 | filename, flags, mode, | |
2573 | fd, fd != -1 ? 0 : *target_errno); | |
2574 | return fd; | |
2575 | } | |
2576 | } | |
2577 | ||
2578 | *target_errno = FILEIO_ENOSYS; | |
2579 | return -1; | |
2580 | } | |
2581 | ||
2582 | /* Write up to LEN bytes from WRITE_BUF to FD on the target. | |
2583 | Return the number of bytes written, or -1 if an error occurs | |
2584 | (and set *TARGET_ERRNO). */ | |
2585 | int | |
2586 | target_fileio_pwrite (int fd, const gdb_byte *write_buf, int len, | |
2587 | ULONGEST offset, int *target_errno) | |
2588 | { | |
2589 | struct target_ops *t; | |
2590 | ||
2591 | for (t = default_fileio_target (); t != NULL; t = t->beneath) | |
2592 | { | |
2593 | if (t->to_fileio_pwrite != NULL) | |
2594 | { | |
0d866f62 | 2595 | int ret = t->to_fileio_pwrite (t, fd, write_buf, len, offset, |
7313baad UW |
2596 | target_errno); |
2597 | ||
2598 | if (targetdebug) | |
2599 | fprintf_unfiltered (gdb_stdlog, | |
a71b5a38 | 2600 | "target_fileio_pwrite (%d,...,%d,%s) " |
7313baad | 2601 | "= %d (%d)\n", |
a71b5a38 | 2602 | fd, len, pulongest (offset), |
7313baad UW |
2603 | ret, ret != -1 ? 0 : *target_errno); |
2604 | return ret; | |
2605 | } | |
2606 | } | |
2607 | ||
2608 | *target_errno = FILEIO_ENOSYS; | |
2609 | return -1; | |
2610 | } | |
2611 | ||
2612 | /* Read up to LEN bytes FD on the target into READ_BUF. | |
2613 | Return the number of bytes read, or -1 if an error occurs | |
2614 | (and set *TARGET_ERRNO). */ | |
2615 | int | |
2616 | target_fileio_pread (int fd, gdb_byte *read_buf, int len, | |
2617 | ULONGEST offset, int *target_errno) | |
2618 | { | |
2619 | struct target_ops *t; | |
2620 | ||
2621 | for (t = default_fileio_target (); t != NULL; t = t->beneath) | |
2622 | { | |
2623 | if (t->to_fileio_pread != NULL) | |
2624 | { | |
a3be983c | 2625 | int ret = t->to_fileio_pread (t, fd, read_buf, len, offset, |
7313baad UW |
2626 | target_errno); |
2627 | ||
2628 | if (targetdebug) | |
2629 | fprintf_unfiltered (gdb_stdlog, | |
a71b5a38 | 2630 | "target_fileio_pread (%d,...,%d,%s) " |
7313baad | 2631 | "= %d (%d)\n", |
a71b5a38 | 2632 | fd, len, pulongest (offset), |
7313baad UW |
2633 | ret, ret != -1 ? 0 : *target_errno); |
2634 | return ret; | |
2635 | } | |
2636 | } | |
2637 | ||
2638 | *target_errno = FILEIO_ENOSYS; | |
2639 | return -1; | |
2640 | } | |
2641 | ||
2642 | /* Close FD on the target. Return 0, or -1 if an error occurs | |
2643 | (and set *TARGET_ERRNO). */ | |
2644 | int | |
2645 | target_fileio_close (int fd, int *target_errno) | |
2646 | { | |
2647 | struct target_ops *t; | |
2648 | ||
2649 | for (t = default_fileio_target (); t != NULL; t = t->beneath) | |
2650 | { | |
2651 | if (t->to_fileio_close != NULL) | |
2652 | { | |
df39ea25 | 2653 | int ret = t->to_fileio_close (t, fd, target_errno); |
7313baad UW |
2654 | |
2655 | if (targetdebug) | |
2656 | fprintf_unfiltered (gdb_stdlog, | |
2657 | "target_fileio_close (%d) = %d (%d)\n", | |
2658 | fd, ret, ret != -1 ? 0 : *target_errno); | |
2659 | return ret; | |
2660 | } | |
2661 | } | |
2662 | ||
2663 | *target_errno = FILEIO_ENOSYS; | |
2664 | return -1; | |
2665 | } | |
2666 | ||
2667 | /* Unlink FILENAME on the target. Return 0, or -1 if an error | |
2668 | occurs (and set *TARGET_ERRNO). */ | |
2669 | int | |
2670 | target_fileio_unlink (const char *filename, int *target_errno) | |
2671 | { | |
2672 | struct target_ops *t; | |
2673 | ||
2674 | for (t = default_fileio_target (); t != NULL; t = t->beneath) | |
2675 | { | |
2676 | if (t->to_fileio_unlink != NULL) | |
2677 | { | |
dbbca37d | 2678 | int ret = t->to_fileio_unlink (t, filename, target_errno); |
7313baad UW |
2679 | |
2680 | if (targetdebug) | |
2681 | fprintf_unfiltered (gdb_stdlog, | |
2682 | "target_fileio_unlink (%s) = %d (%d)\n", | |
2683 | filename, ret, ret != -1 ? 0 : *target_errno); | |
2684 | return ret; | |
2685 | } | |
2686 | } | |
2687 | ||
2688 | *target_errno = FILEIO_ENOSYS; | |
2689 | return -1; | |
2690 | } | |
2691 | ||
b9e7b9c3 UW |
2692 | /* Read value of symbolic link FILENAME on the target. Return a |
2693 | null-terminated string allocated via xmalloc, or NULL if an error | |
2694 | occurs (and set *TARGET_ERRNO). */ | |
2695 | char * | |
2696 | target_fileio_readlink (const char *filename, int *target_errno) | |
2697 | { | |
2698 | struct target_ops *t; | |
2699 | ||
2700 | for (t = default_fileio_target (); t != NULL; t = t->beneath) | |
2701 | { | |
2702 | if (t->to_fileio_readlink != NULL) | |
2703 | { | |
fab5aa7c | 2704 | char *ret = t->to_fileio_readlink (t, filename, target_errno); |
b9e7b9c3 UW |
2705 | |
2706 | if (targetdebug) | |
2707 | fprintf_unfiltered (gdb_stdlog, | |
2708 | "target_fileio_readlink (%s) = %s (%d)\n", | |
2709 | filename, ret? ret : "(nil)", | |
2710 | ret? 0 : *target_errno); | |
2711 | return ret; | |
2712 | } | |
2713 | } | |
2714 | ||
2715 | *target_errno = FILEIO_ENOSYS; | |
2716 | return NULL; | |
2717 | } | |
2718 | ||
7313baad UW |
2719 | static void |
2720 | target_fileio_close_cleanup (void *opaque) | |
2721 | { | |
2722 | int fd = *(int *) opaque; | |
2723 | int target_errno; | |
2724 | ||
2725 | target_fileio_close (fd, &target_errno); | |
2726 | } | |
2727 | ||
2728 | /* Read target file FILENAME. Store the result in *BUF_P and | |
2729 | return the size of the transferred data. PADDING additional bytes are | |
2730 | available in *BUF_P. This is a helper function for | |
2731 | target_fileio_read_alloc; see the declaration of that function for more | |
2732 | information. */ | |
2733 | ||
2734 | static LONGEST | |
2735 | target_fileio_read_alloc_1 (const char *filename, | |
2736 | gdb_byte **buf_p, int padding) | |
2737 | { | |
2738 | struct cleanup *close_cleanup; | |
2739 | size_t buf_alloc, buf_pos; | |
2740 | gdb_byte *buf; | |
2741 | LONGEST n; | |
2742 | int fd; | |
2743 | int target_errno; | |
2744 | ||
2745 | fd = target_fileio_open (filename, FILEIO_O_RDONLY, 0700, &target_errno); | |
2746 | if (fd == -1) | |
2747 | return -1; | |
2748 | ||
2749 | close_cleanup = make_cleanup (target_fileio_close_cleanup, &fd); | |
2750 | ||
2751 | /* Start by reading up to 4K at a time. The target will throttle | |
2752 | this number down if necessary. */ | |
2753 | buf_alloc = 4096; | |
2754 | buf = xmalloc (buf_alloc); | |
2755 | buf_pos = 0; | |
2756 | while (1) | |
2757 | { | |
2758 | n = target_fileio_pread (fd, &buf[buf_pos], | |
2759 | buf_alloc - buf_pos - padding, buf_pos, | |
2760 | &target_errno); | |
2761 | if (n < 0) | |
2762 | { | |
2763 | /* An error occurred. */ | |
2764 | do_cleanups (close_cleanup); | |
2765 | xfree (buf); | |
2766 | return -1; | |
2767 | } | |
2768 | else if (n == 0) | |
2769 | { | |
2770 | /* Read all there was. */ | |
2771 | do_cleanups (close_cleanup); | |
2772 | if (buf_pos == 0) | |
2773 | xfree (buf); | |
2774 | else | |
2775 | *buf_p = buf; | |
2776 | return buf_pos; | |
2777 | } | |
2778 | ||
2779 | buf_pos += n; | |
2780 | ||
2781 | /* If the buffer is filling up, expand it. */ | |
2782 | if (buf_alloc < buf_pos * 2) | |
2783 | { | |
2784 | buf_alloc *= 2; | |
2785 | buf = xrealloc (buf, buf_alloc); | |
2786 | } | |
2787 | ||
2788 | QUIT; | |
2789 | } | |
2790 | } | |
2791 | ||
2792 | /* Read target file FILENAME. Store the result in *BUF_P and return | |
2793 | the size of the transferred data. See the declaration in "target.h" | |
2794 | function for more information about the return value. */ | |
2795 | ||
2796 | LONGEST | |
2797 | target_fileio_read_alloc (const char *filename, gdb_byte **buf_p) | |
2798 | { | |
2799 | return target_fileio_read_alloc_1 (filename, buf_p, 0); | |
2800 | } | |
2801 | ||
2802 | /* Read target file FILENAME. The result is NUL-terminated and | |
2803 | returned as a string, allocated using xmalloc. If an error occurs | |
2804 | or the transfer is unsupported, NULL is returned. Empty objects | |
2805 | are returned as allocated but empty strings. A warning is issued | |
2806 | if the result contains any embedded NUL bytes. */ | |
2807 | ||
2808 | char * | |
2809 | target_fileio_read_stralloc (const char *filename) | |
2810 | { | |
39086a0e PA |
2811 | gdb_byte *buffer; |
2812 | char *bufstr; | |
7313baad UW |
2813 | LONGEST i, transferred; |
2814 | ||
39086a0e PA |
2815 | transferred = target_fileio_read_alloc_1 (filename, &buffer, 1); |
2816 | bufstr = (char *) buffer; | |
7313baad UW |
2817 | |
2818 | if (transferred < 0) | |
2819 | return NULL; | |
2820 | ||
2821 | if (transferred == 0) | |
2822 | return xstrdup (""); | |
2823 | ||
39086a0e | 2824 | bufstr[transferred] = 0; |
7313baad UW |
2825 | |
2826 | /* Check for embedded NUL bytes; but allow trailing NULs. */ | |
39086a0e PA |
2827 | for (i = strlen (bufstr); i < transferred; i++) |
2828 | if (bufstr[i] != 0) | |
7313baad UW |
2829 | { |
2830 | warning (_("target file %s " | |
2831 | "contained unexpected null characters"), | |
2832 | filename); | |
2833 | break; | |
2834 | } | |
2835 | ||
39086a0e | 2836 | return bufstr; |
7313baad UW |
2837 | } |
2838 | ||
2839 | ||
e0d24f8d | 2840 | static int |
31568a15 TT |
2841 | default_region_ok_for_hw_watchpoint (struct target_ops *self, |
2842 | CORE_ADDR addr, int len) | |
e0d24f8d | 2843 | { |
f5656ead | 2844 | return (len <= gdbarch_ptr_bit (target_gdbarch ()) / TARGET_CHAR_BIT); |
ccaa32c7 GS |
2845 | } |
2846 | ||
5009afc5 AS |
2847 | static int |
2848 | default_watchpoint_addr_within_range (struct target_ops *target, | |
2849 | CORE_ADDR addr, | |
2850 | CORE_ADDR start, int length) | |
2851 | { | |
2852 | return addr >= start && addr < start + length; | |
2853 | } | |
2854 | ||
c2250ad1 UW |
2855 | static struct gdbarch * |
2856 | default_thread_architecture (struct target_ops *ops, ptid_t ptid) | |
2857 | { | |
f5656ead | 2858 | return target_gdbarch (); |
c2250ad1 UW |
2859 | } |
2860 | ||
c906108c | 2861 | static int |
555bbdeb TT |
2862 | return_zero (struct target_ops *ignore) |
2863 | { | |
2864 | return 0; | |
2865 | } | |
2866 | ||
2867 | static int | |
2868 | return_zero_has_execution (struct target_ops *ignore, ptid_t ignore2) | |
c906108c SS |
2869 | { |
2870 | return 0; | |
2871 | } | |
2872 | ||
ed9a39eb JM |
2873 | /* |
2874 | * Find the next target down the stack from the specified target. | |
2875 | */ | |
2876 | ||
2877 | struct target_ops * | |
fba45db2 | 2878 | find_target_beneath (struct target_ops *t) |
ed9a39eb | 2879 | { |
258b763a | 2880 | return t->beneath; |
ed9a39eb JM |
2881 | } |
2882 | ||
8b06beed TT |
2883 | /* See target.h. */ |
2884 | ||
2885 | struct target_ops * | |
2886 | find_target_at (enum strata stratum) | |
2887 | { | |
2888 | struct target_ops *t; | |
2889 | ||
2890 | for (t = current_target.beneath; t != NULL; t = t->beneath) | |
2891 | if (t->to_stratum == stratum) | |
2892 | return t; | |
2893 | ||
2894 | return NULL; | |
2895 | } | |
2896 | ||
c906108c SS |
2897 | \f |
2898 | /* The inferior process has died. Long live the inferior! */ | |
2899 | ||
2900 | void | |
fba45db2 | 2901 | generic_mourn_inferior (void) |
c906108c | 2902 | { |
7f9f62ba | 2903 | ptid_t ptid; |
c906108c | 2904 | |
7f9f62ba | 2905 | ptid = inferior_ptid; |
39f77062 | 2906 | inferior_ptid = null_ptid; |
7f9f62ba | 2907 | |
f59f708a PA |
2908 | /* Mark breakpoints uninserted in case something tries to delete a |
2909 | breakpoint while we delete the inferior's threads (which would | |
2910 | fail, since the inferior is long gone). */ | |
2911 | mark_breakpoints_out (); | |
2912 | ||
7f9f62ba PA |
2913 | if (!ptid_equal (ptid, null_ptid)) |
2914 | { | |
2915 | int pid = ptid_get_pid (ptid); | |
6c95b8df | 2916 | exit_inferior (pid); |
7f9f62ba PA |
2917 | } |
2918 | ||
f59f708a PA |
2919 | /* Note this wipes step-resume breakpoints, so needs to be done |
2920 | after exit_inferior, which ends up referencing the step-resume | |
2921 | breakpoints through clear_thread_inferior_resources. */ | |
c906108c | 2922 | breakpoint_init_inferior (inf_exited); |
f59f708a | 2923 | |
c906108c SS |
2924 | registers_changed (); |
2925 | ||
c906108c SS |
2926 | reopen_exec_file (); |
2927 | reinit_frame_cache (); | |
2928 | ||
9a4105ab AC |
2929 | if (deprecated_detach_hook) |
2930 | deprecated_detach_hook (); | |
c906108c SS |
2931 | } |
2932 | \f | |
fd0a2a6f MK |
2933 | /* Convert a normal process ID to a string. Returns the string in a |
2934 | static buffer. */ | |
c906108c SS |
2935 | |
2936 | char * | |
39f77062 | 2937 | normal_pid_to_str (ptid_t ptid) |
c906108c | 2938 | { |
fd0a2a6f | 2939 | static char buf[32]; |
c906108c | 2940 | |
5fff8fc0 | 2941 | xsnprintf (buf, sizeof buf, "process %d", ptid_get_pid (ptid)); |
c906108c SS |
2942 | return buf; |
2943 | } | |
2944 | ||
2c0b251b | 2945 | static char * |
770234d3 | 2946 | default_pid_to_str (struct target_ops *ops, ptid_t ptid) |
117de6a9 PA |
2947 | { |
2948 | return normal_pid_to_str (ptid); | |
2949 | } | |
2950 | ||
9b4eba8e HZ |
2951 | /* Error-catcher for target_find_memory_regions. */ |
2952 | static int | |
2e73927c TT |
2953 | dummy_find_memory_regions (struct target_ops *self, |
2954 | find_memory_region_ftype ignore1, void *ignore2) | |
be4d1333 | 2955 | { |
9b4eba8e | 2956 | error (_("Command not implemented for this target.")); |
be4d1333 MS |
2957 | return 0; |
2958 | } | |
2959 | ||
9b4eba8e HZ |
2960 | /* Error-catcher for target_make_corefile_notes. */ |
2961 | static char * | |
fc6691b2 TT |
2962 | dummy_make_corefile_notes (struct target_ops *self, |
2963 | bfd *ignore1, int *ignore2) | |
be4d1333 | 2964 | { |
9b4eba8e | 2965 | error (_("Command not implemented for this target.")); |
be4d1333 MS |
2966 | return NULL; |
2967 | } | |
2968 | ||
c906108c SS |
2969 | /* Set up the handful of non-empty slots needed by the dummy target |
2970 | vector. */ | |
2971 | ||
2972 | static void | |
fba45db2 | 2973 | init_dummy_target (void) |
c906108c SS |
2974 | { |
2975 | dummy_target.to_shortname = "None"; | |
2976 | dummy_target.to_longname = "None"; | |
2977 | dummy_target.to_doc = ""; | |
03583c20 UW |
2978 | dummy_target.to_supports_disable_randomization |
2979 | = find_default_supports_disable_randomization; | |
c906108c | 2980 | dummy_target.to_stratum = dummy_stratum; |
555bbdeb TT |
2981 | dummy_target.to_has_all_memory = return_zero; |
2982 | dummy_target.to_has_memory = return_zero; | |
2983 | dummy_target.to_has_stack = return_zero; | |
2984 | dummy_target.to_has_registers = return_zero; | |
2985 | dummy_target.to_has_execution = return_zero_has_execution; | |
c906108c | 2986 | dummy_target.to_magic = OPS_MAGIC; |
1101cb7b TT |
2987 | |
2988 | install_dummy_methods (&dummy_target); | |
c906108c | 2989 | } |
c906108c | 2990 | \f |
c906108c | 2991 | |
f1c07ab0 | 2992 | void |
460014f5 | 2993 | target_close (struct target_ops *targ) |
f1c07ab0 | 2994 | { |
7fdc1521 TT |
2995 | gdb_assert (!target_is_pushed (targ)); |
2996 | ||
f1c07ab0 | 2997 | if (targ->to_xclose != NULL) |
460014f5 | 2998 | targ->to_xclose (targ); |
f1c07ab0 | 2999 | else if (targ->to_close != NULL) |
de90e03d | 3000 | targ->to_close (targ); |
947b8855 PA |
3001 | |
3002 | if (targetdebug) | |
460014f5 | 3003 | fprintf_unfiltered (gdb_stdlog, "target_close ()\n"); |
f1c07ab0 AC |
3004 | } |
3005 | ||
28439f5e PA |
3006 | int |
3007 | target_thread_alive (ptid_t ptid) | |
c906108c | 3008 | { |
a7068b60 | 3009 | return current_target.to_thread_alive (¤t_target, ptid); |
28439f5e PA |
3010 | } |
3011 | ||
3012 | void | |
3013 | target_find_new_threads (void) | |
3014 | { | |
09b0dc2b | 3015 | current_target.to_find_new_threads (¤t_target); |
c906108c SS |
3016 | } |
3017 | ||
d914c394 SS |
3018 | void |
3019 | target_stop (ptid_t ptid) | |
3020 | { | |
3021 | if (!may_stop) | |
3022 | { | |
3023 | warning (_("May not interrupt or stop the target, ignoring attempt")); | |
3024 | return; | |
3025 | } | |
3026 | ||
1eab8a48 | 3027 | (*current_target.to_stop) (¤t_target, ptid); |
d914c394 SS |
3028 | } |
3029 | ||
f8c1d06b GB |
3030 | /* See target/target.h. */ |
3031 | ||
3032 | void | |
03f4463b | 3033 | target_stop_and_wait (ptid_t ptid) |
f8c1d06b GB |
3034 | { |
3035 | struct target_waitstatus status; | |
3036 | int was_non_stop = non_stop; | |
3037 | ||
3038 | non_stop = 1; | |
3039 | target_stop (ptid); | |
3040 | ||
3041 | memset (&status, 0, sizeof (status)); | |
3042 | target_wait (ptid, &status, 0); | |
3043 | ||
3044 | non_stop = was_non_stop; | |
3045 | } | |
3046 | ||
3047 | /* See target/target.h. */ | |
3048 | ||
3049 | void | |
03f4463b | 3050 | target_continue_no_signal (ptid_t ptid) |
f8c1d06b GB |
3051 | { |
3052 | target_resume (ptid, 0, GDB_SIGNAL_0); | |
3053 | } | |
3054 | ||
09826ec5 PA |
3055 | /* Concatenate ELEM to LIST, a comma separate list, and return the |
3056 | result. The LIST incoming argument is released. */ | |
3057 | ||
3058 | static char * | |
3059 | str_comma_list_concat_elem (char *list, const char *elem) | |
3060 | { | |
3061 | if (list == NULL) | |
3062 | return xstrdup (elem); | |
3063 | else | |
3064 | return reconcat (list, list, ", ", elem, (char *) NULL); | |
3065 | } | |
3066 | ||
3067 | /* Helper for target_options_to_string. If OPT is present in | |
3068 | TARGET_OPTIONS, append the OPT_STR (string version of OPT) in RET. | |
3069 | Returns the new resulting string. OPT is removed from | |
3070 | TARGET_OPTIONS. */ | |
3071 | ||
3072 | static char * | |
3073 | do_option (int *target_options, char *ret, | |
3074 | int opt, char *opt_str) | |
3075 | { | |
3076 | if ((*target_options & opt) != 0) | |
3077 | { | |
3078 | ret = str_comma_list_concat_elem (ret, opt_str); | |
3079 | *target_options &= ~opt; | |
3080 | } | |
3081 | ||
3082 | return ret; | |
3083 | } | |
3084 | ||
3085 | char * | |
3086 | target_options_to_string (int target_options) | |
3087 | { | |
3088 | char *ret = NULL; | |
3089 | ||
3090 | #define DO_TARG_OPTION(OPT) \ | |
3091 | ret = do_option (&target_options, ret, OPT, #OPT) | |
3092 | ||
3093 | DO_TARG_OPTION (TARGET_WNOHANG); | |
3094 | ||
3095 | if (target_options != 0) | |
3096 | ret = str_comma_list_concat_elem (ret, "unknown???"); | |
3097 | ||
3098 | if (ret == NULL) | |
3099 | ret = xstrdup (""); | |
3100 | return ret; | |
3101 | } | |
3102 | ||
bf0c5130 | 3103 | static void |
56be3814 UW |
3104 | debug_print_register (const char * func, |
3105 | struct regcache *regcache, int regno) | |
bf0c5130 | 3106 | { |
f8d29908 | 3107 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
5d502164 | 3108 | |
bf0c5130 | 3109 | fprintf_unfiltered (gdb_stdlog, "%s ", func); |
f8d29908 | 3110 | if (regno >= 0 && regno < gdbarch_num_regs (gdbarch) |
f8d29908 UW |
3111 | && gdbarch_register_name (gdbarch, regno) != NULL |
3112 | && gdbarch_register_name (gdbarch, regno)[0] != '\0') | |
3113 | fprintf_unfiltered (gdb_stdlog, "(%s)", | |
3114 | gdbarch_register_name (gdbarch, regno)); | |
bf0c5130 AC |
3115 | else |
3116 | fprintf_unfiltered (gdb_stdlog, "(%d)", regno); | |
0ff58721 | 3117 | if (regno >= 0 && regno < gdbarch_num_regs (gdbarch)) |
bf0c5130 | 3118 | { |
e17a4113 | 3119 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
f8d29908 | 3120 | int i, size = register_size (gdbarch, regno); |
e362b510 | 3121 | gdb_byte buf[MAX_REGISTER_SIZE]; |
5d502164 | 3122 | |
0ff58721 | 3123 | regcache_raw_collect (regcache, regno, buf); |
bf0c5130 | 3124 | fprintf_unfiltered (gdb_stdlog, " = "); |
81c4a259 | 3125 | for (i = 0; i < size; i++) |
bf0c5130 AC |
3126 | { |
3127 | fprintf_unfiltered (gdb_stdlog, "%02x", buf[i]); | |
3128 | } | |
81c4a259 | 3129 | if (size <= sizeof (LONGEST)) |
bf0c5130 | 3130 | { |
e17a4113 | 3131 | ULONGEST val = extract_unsigned_integer (buf, size, byte_order); |
5d502164 | 3132 | |
0b1553bc UW |
3133 | fprintf_unfiltered (gdb_stdlog, " %s %s", |
3134 | core_addr_to_string_nz (val), plongest (val)); | |
bf0c5130 AC |
3135 | } |
3136 | } | |
3137 | fprintf_unfiltered (gdb_stdlog, "\n"); | |
3138 | } | |
3139 | ||
28439f5e PA |
3140 | void |
3141 | target_fetch_registers (struct regcache *regcache, int regno) | |
c906108c | 3142 | { |
ad5989bd TT |
3143 | current_target.to_fetch_registers (¤t_target, regcache, regno); |
3144 | if (targetdebug) | |
3145 | debug_print_register ("target_fetch_registers", regcache, regno); | |
c906108c SS |
3146 | } |
3147 | ||
28439f5e PA |
3148 | void |
3149 | target_store_registers (struct regcache *regcache, int regno) | |
c906108c | 3150 | { |
28439f5e | 3151 | struct target_ops *t; |
5d502164 | 3152 | |
d914c394 SS |
3153 | if (!may_write_registers) |
3154 | error (_("Writing to registers is not allowed (regno %d)"), regno); | |
3155 | ||
6b84065d TT |
3156 | current_target.to_store_registers (¤t_target, regcache, regno); |
3157 | if (targetdebug) | |
28439f5e | 3158 | { |
6b84065d | 3159 | debug_print_register ("target_store_registers", regcache, regno); |
28439f5e | 3160 | } |
c906108c SS |
3161 | } |
3162 | ||
dc146f7c VP |
3163 | int |
3164 | target_core_of_thread (ptid_t ptid) | |
3165 | { | |
a7068b60 | 3166 | return current_target.to_core_of_thread (¤t_target, ptid); |
dc146f7c VP |
3167 | } |
3168 | ||
936d2992 PA |
3169 | int |
3170 | simple_verify_memory (struct target_ops *ops, | |
3171 | const gdb_byte *data, CORE_ADDR lma, ULONGEST size) | |
3172 | { | |
3173 | LONGEST total_xfered = 0; | |
3174 | ||
3175 | while (total_xfered < size) | |
3176 | { | |
3177 | ULONGEST xfered_len; | |
3178 | enum target_xfer_status status; | |
3179 | gdb_byte buf[1024]; | |
3180 | ULONGEST howmuch = min (sizeof (buf), size - total_xfered); | |
3181 | ||
3182 | status = target_xfer_partial (ops, TARGET_OBJECT_MEMORY, NULL, | |
3183 | buf, NULL, lma + total_xfered, howmuch, | |
3184 | &xfered_len); | |
3185 | if (status == TARGET_XFER_OK | |
3186 | && memcmp (data + total_xfered, buf, xfered_len) == 0) | |
3187 | { | |
3188 | total_xfered += xfered_len; | |
3189 | QUIT; | |
3190 | } | |
3191 | else | |
3192 | return 0; | |
3193 | } | |
3194 | return 1; | |
3195 | } | |
3196 | ||
3197 | /* Default implementation of memory verification. */ | |
3198 | ||
3199 | static int | |
3200 | default_verify_memory (struct target_ops *self, | |
3201 | const gdb_byte *data, CORE_ADDR memaddr, ULONGEST size) | |
3202 | { | |
3203 | /* Start over from the top of the target stack. */ | |
3204 | return simple_verify_memory (current_target.beneath, | |
3205 | data, memaddr, size); | |
3206 | } | |
3207 | ||
4a5e7a5b PA |
3208 | int |
3209 | target_verify_memory (const gdb_byte *data, CORE_ADDR memaddr, ULONGEST size) | |
3210 | { | |
a7068b60 TT |
3211 | return current_target.to_verify_memory (¤t_target, |
3212 | data, memaddr, size); | |
4a5e7a5b PA |
3213 | } |
3214 | ||
9c06b0b4 TJB |
3215 | /* The documentation for this function is in its prototype declaration in |
3216 | target.h. */ | |
3217 | ||
3218 | int | |
3219 | target_insert_mask_watchpoint (CORE_ADDR addr, CORE_ADDR mask, int rw) | |
3220 | { | |
a7068b60 TT |
3221 | return current_target.to_insert_mask_watchpoint (¤t_target, |
3222 | addr, mask, rw); | |
9c06b0b4 TJB |
3223 | } |
3224 | ||
3225 | /* The documentation for this function is in its prototype declaration in | |
3226 | target.h. */ | |
3227 | ||
3228 | int | |
3229 | target_remove_mask_watchpoint (CORE_ADDR addr, CORE_ADDR mask, int rw) | |
3230 | { | |
a7068b60 TT |
3231 | return current_target.to_remove_mask_watchpoint (¤t_target, |
3232 | addr, mask, rw); | |
9c06b0b4 TJB |
3233 | } |
3234 | ||
3235 | /* The documentation for this function is in its prototype declaration | |
3236 | in target.h. */ | |
3237 | ||
3238 | int | |
3239 | target_masked_watch_num_registers (CORE_ADDR addr, CORE_ADDR mask) | |
3240 | { | |
6c7e5e5c TT |
3241 | return current_target.to_masked_watch_num_registers (¤t_target, |
3242 | addr, mask); | |
9c06b0b4 TJB |
3243 | } |
3244 | ||
f1310107 TJB |
3245 | /* The documentation for this function is in its prototype declaration |
3246 | in target.h. */ | |
3247 | ||
3248 | int | |
3249 | target_ranged_break_num_registers (void) | |
3250 | { | |
a134316b | 3251 | return current_target.to_ranged_break_num_registers (¤t_target); |
f1310107 TJB |
3252 | } |
3253 | ||
02d27625 MM |
3254 | /* See target.h. */ |
3255 | ||
02d27625 MM |
3256 | struct btrace_target_info * |
3257 | target_enable_btrace (ptid_t ptid) | |
3258 | { | |
6dc7fcf4 | 3259 | return current_target.to_enable_btrace (¤t_target, ptid); |
02d27625 MM |
3260 | } |
3261 | ||
3262 | /* See target.h. */ | |
3263 | ||
3264 | void | |
3265 | target_disable_btrace (struct btrace_target_info *btinfo) | |
3266 | { | |
8dc292d3 | 3267 | current_target.to_disable_btrace (¤t_target, btinfo); |
02d27625 MM |
3268 | } |
3269 | ||
3270 | /* See target.h. */ | |
3271 | ||
3272 | void | |
3273 | target_teardown_btrace (struct btrace_target_info *btinfo) | |
3274 | { | |
9ace480d | 3275 | current_target.to_teardown_btrace (¤t_target, btinfo); |
02d27625 MM |
3276 | } |
3277 | ||
3278 | /* See target.h. */ | |
3279 | ||
969c39fb MM |
3280 | enum btrace_error |
3281 | target_read_btrace (VEC (btrace_block_s) **btrace, | |
3282 | struct btrace_target_info *btinfo, | |
02d27625 MM |
3283 | enum btrace_read_type type) |
3284 | { | |
eb5b20d4 | 3285 | return current_target.to_read_btrace (¤t_target, btrace, btinfo, type); |
02d27625 MM |
3286 | } |
3287 | ||
d02ed0bb MM |
3288 | /* See target.h. */ |
3289 | ||
7c1687a9 MM |
3290 | void |
3291 | target_stop_recording (void) | |
3292 | { | |
ee97f592 | 3293 | current_target.to_stop_recording (¤t_target); |
7c1687a9 MM |
3294 | } |
3295 | ||
3296 | /* See target.h. */ | |
3297 | ||
d02ed0bb | 3298 | void |
85e1311a | 3299 | target_save_record (const char *filename) |
d02ed0bb | 3300 | { |
f09e2107 | 3301 | current_target.to_save_record (¤t_target, filename); |
d02ed0bb MM |
3302 | } |
3303 | ||
3304 | /* See target.h. */ | |
3305 | ||
3306 | int | |
3307 | target_supports_delete_record (void) | |
3308 | { | |
3309 | struct target_ops *t; | |
3310 | ||
3311 | for (t = current_target.beneath; t != NULL; t = t->beneath) | |
b0ed115f TT |
3312 | if (t->to_delete_record != delegate_delete_record |
3313 | && t->to_delete_record != tdefault_delete_record) | |
d02ed0bb MM |
3314 | return 1; |
3315 | ||
3316 | return 0; | |
3317 | } | |
3318 | ||
3319 | /* See target.h. */ | |
3320 | ||
3321 | void | |
3322 | target_delete_record (void) | |
3323 | { | |
07366925 | 3324 | current_target.to_delete_record (¤t_target); |
d02ed0bb MM |
3325 | } |
3326 | ||
3327 | /* See target.h. */ | |
3328 | ||
3329 | int | |
3330 | target_record_is_replaying (void) | |
3331 | { | |
dd2e9d25 | 3332 | return current_target.to_record_is_replaying (¤t_target); |
d02ed0bb MM |
3333 | } |
3334 | ||
3335 | /* See target.h. */ | |
3336 | ||
3337 | void | |
3338 | target_goto_record_begin (void) | |
3339 | { | |
671e76cc | 3340 | current_target.to_goto_record_begin (¤t_target); |
d02ed0bb MM |
3341 | } |
3342 | ||
3343 | /* See target.h. */ | |
3344 | ||
3345 | void | |
3346 | target_goto_record_end (void) | |
3347 | { | |
e9179bb3 | 3348 | current_target.to_goto_record_end (¤t_target); |
d02ed0bb MM |
3349 | } |
3350 | ||
3351 | /* See target.h. */ | |
3352 | ||
3353 | void | |
3354 | target_goto_record (ULONGEST insn) | |
3355 | { | |
05969c84 | 3356 | current_target.to_goto_record (¤t_target, insn); |
d02ed0bb MM |
3357 | } |
3358 | ||
67c86d06 MM |
3359 | /* See target.h. */ |
3360 | ||
3361 | void | |
3362 | target_insn_history (int size, int flags) | |
3363 | { | |
3679abfa | 3364 | current_target.to_insn_history (¤t_target, size, flags); |
67c86d06 MM |
3365 | } |
3366 | ||
3367 | /* See target.h. */ | |
3368 | ||
3369 | void | |
3370 | target_insn_history_from (ULONGEST from, int size, int flags) | |
3371 | { | |
8444ab58 | 3372 | current_target.to_insn_history_from (¤t_target, from, size, flags); |
67c86d06 MM |
3373 | } |
3374 | ||
3375 | /* See target.h. */ | |
3376 | ||
3377 | void | |
3378 | target_insn_history_range (ULONGEST begin, ULONGEST end, int flags) | |
3379 | { | |
c29302cc | 3380 | current_target.to_insn_history_range (¤t_target, begin, end, flags); |
67c86d06 MM |
3381 | } |
3382 | ||
15984c13 MM |
3383 | /* See target.h. */ |
3384 | ||
3385 | void | |
3386 | target_call_history (int size, int flags) | |
3387 | { | |
170049d4 | 3388 | current_target.to_call_history (¤t_target, size, flags); |
15984c13 MM |
3389 | } |
3390 | ||
3391 | /* See target.h. */ | |
3392 | ||
3393 | void | |
3394 | target_call_history_from (ULONGEST begin, int size, int flags) | |
3395 | { | |
16fc27d6 | 3396 | current_target.to_call_history_from (¤t_target, begin, size, flags); |
15984c13 MM |
3397 | } |
3398 | ||
3399 | /* See target.h. */ | |
3400 | ||
3401 | void | |
3402 | target_call_history_range (ULONGEST begin, ULONGEST end, int flags) | |
3403 | { | |
115d9817 | 3404 | current_target.to_call_history_range (¤t_target, begin, end, flags); |
15984c13 MM |
3405 | } |
3406 | ||
ea001bdc MM |
3407 | /* See target.h. */ |
3408 | ||
3409 | const struct frame_unwind * | |
3410 | target_get_unwinder (void) | |
3411 | { | |
ac01945b | 3412 | return current_target.to_get_unwinder (¤t_target); |
ea001bdc MM |
3413 | } |
3414 | ||
3415 | /* See target.h. */ | |
3416 | ||
3417 | const struct frame_unwind * | |
3418 | target_get_tailcall_unwinder (void) | |
3419 | { | |
ac01945b | 3420 | return current_target.to_get_tailcall_unwinder (¤t_target); |
ea001bdc MM |
3421 | } |
3422 | ||
c0eca49f | 3423 | /* Default implementation of to_decr_pc_after_break. */ |
118e6252 | 3424 | |
c0eca49f TT |
3425 | static CORE_ADDR |
3426 | default_target_decr_pc_after_break (struct target_ops *ops, | |
118e6252 MM |
3427 | struct gdbarch *gdbarch) |
3428 | { | |
118e6252 MM |
3429 | return gdbarch_decr_pc_after_break (gdbarch); |
3430 | } | |
3431 | ||
3432 | /* See target.h. */ | |
3433 | ||
3434 | CORE_ADDR | |
3435 | target_decr_pc_after_break (struct gdbarch *gdbarch) | |
3436 | { | |
c0eca49f | 3437 | return current_target.to_decr_pc_after_break (¤t_target, gdbarch); |
118e6252 MM |
3438 | } |
3439 | ||
5fff78c4 MM |
3440 | /* See target.h. */ |
3441 | ||
3442 | void | |
3443 | target_prepare_to_generate_core (void) | |
3444 | { | |
3445 | current_target.to_prepare_to_generate_core (¤t_target); | |
3446 | } | |
3447 | ||
3448 | /* See target.h. */ | |
3449 | ||
3450 | void | |
3451 | target_done_generating_core (void) | |
3452 | { | |
3453 | current_target.to_done_generating_core (¤t_target); | |
3454 | } | |
3455 | ||
c906108c | 3456 | static void |
fba45db2 | 3457 | setup_target_debug (void) |
c906108c SS |
3458 | { |
3459 | memcpy (&debug_target, ¤t_target, sizeof debug_target); | |
3460 | ||
a7068b60 | 3461 | init_debug_target (¤t_target); |
c906108c | 3462 | } |
c906108c | 3463 | \f |
c5aa993b JM |
3464 | |
3465 | static char targ_desc[] = | |
3e43a32a MS |
3466 | "Names of targets and files being debugged.\nShows the entire \ |
3467 | stack of targets currently in use (including the exec-file,\n\ | |
c906108c SS |
3468 | core-file, and process, if any), as well as the symbol file name."; |
3469 | ||
a53f3625 | 3470 | static void |
a30bf1f1 TT |
3471 | default_rcmd (struct target_ops *self, const char *command, |
3472 | struct ui_file *output) | |
a53f3625 TT |
3473 | { |
3474 | error (_("\"monitor\" command not supported by this target.")); | |
3475 | } | |
3476 | ||
96baa820 JM |
3477 | static void |
3478 | do_monitor_command (char *cmd, | |
3479 | int from_tty) | |
3480 | { | |
96baa820 JM |
3481 | target_rcmd (cmd, gdb_stdtarg); |
3482 | } | |
3483 | ||
87680a14 JB |
3484 | /* Print the name of each layers of our target stack. */ |
3485 | ||
3486 | static void | |
3487 | maintenance_print_target_stack (char *cmd, int from_tty) | |
3488 | { | |
3489 | struct target_ops *t; | |
3490 | ||
3491 | printf_filtered (_("The current target stack is:\n")); | |
3492 | ||
3493 | for (t = target_stack; t != NULL; t = t->beneath) | |
3494 | { | |
3495 | printf_filtered (" - %s (%s)\n", t->to_shortname, t->to_longname); | |
3496 | } | |
3497 | } | |
3498 | ||
329ea579 PA |
3499 | /* Controls if targets can report that they can/are async. This is |
3500 | just for maintainers to use when debugging gdb. */ | |
3501 | int target_async_permitted = 1; | |
c6ebd6cf VP |
3502 | |
3503 | /* The set command writes to this variable. If the inferior is | |
b5419e49 | 3504 | executing, target_async_permitted is *not* updated. */ |
329ea579 | 3505 | static int target_async_permitted_1 = 1; |
c6ebd6cf VP |
3506 | |
3507 | static void | |
329ea579 PA |
3508 | maint_set_target_async_command (char *args, int from_tty, |
3509 | struct cmd_list_element *c) | |
c6ebd6cf | 3510 | { |
c35b1492 | 3511 | if (have_live_inferiors ()) |
c6ebd6cf VP |
3512 | { |
3513 | target_async_permitted_1 = target_async_permitted; | |
3514 | error (_("Cannot change this setting while the inferior is running.")); | |
3515 | } | |
3516 | ||
3517 | target_async_permitted = target_async_permitted_1; | |
3518 | } | |
3519 | ||
3520 | static void | |
329ea579 PA |
3521 | maint_show_target_async_command (struct ui_file *file, int from_tty, |
3522 | struct cmd_list_element *c, | |
3523 | const char *value) | |
c6ebd6cf | 3524 | { |
3e43a32a MS |
3525 | fprintf_filtered (file, |
3526 | _("Controlling the inferior in " | |
3527 | "asynchronous mode is %s.\n"), value); | |
c6ebd6cf VP |
3528 | } |
3529 | ||
d914c394 SS |
3530 | /* Temporary copies of permission settings. */ |
3531 | ||
3532 | static int may_write_registers_1 = 1; | |
3533 | static int may_write_memory_1 = 1; | |
3534 | static int may_insert_breakpoints_1 = 1; | |
3535 | static int may_insert_tracepoints_1 = 1; | |
3536 | static int may_insert_fast_tracepoints_1 = 1; | |
3537 | static int may_stop_1 = 1; | |
3538 | ||
3539 | /* Make the user-set values match the real values again. */ | |
3540 | ||
3541 | void | |
3542 | update_target_permissions (void) | |
3543 | { | |
3544 | may_write_registers_1 = may_write_registers; | |
3545 | may_write_memory_1 = may_write_memory; | |
3546 | may_insert_breakpoints_1 = may_insert_breakpoints; | |
3547 | may_insert_tracepoints_1 = may_insert_tracepoints; | |
3548 | may_insert_fast_tracepoints_1 = may_insert_fast_tracepoints; | |
3549 | may_stop_1 = may_stop; | |
3550 | } | |
3551 | ||
3552 | /* The one function handles (most of) the permission flags in the same | |
3553 | way. */ | |
3554 | ||
3555 | static void | |
3556 | set_target_permissions (char *args, int from_tty, | |
3557 | struct cmd_list_element *c) | |
3558 | { | |
3559 | if (target_has_execution) | |
3560 | { | |
3561 | update_target_permissions (); | |
3562 | error (_("Cannot change this setting while the inferior is running.")); | |
3563 | } | |
3564 | ||
3565 | /* Make the real values match the user-changed values. */ | |
3566 | may_write_registers = may_write_registers_1; | |
3567 | may_insert_breakpoints = may_insert_breakpoints_1; | |
3568 | may_insert_tracepoints = may_insert_tracepoints_1; | |
3569 | may_insert_fast_tracepoints = may_insert_fast_tracepoints_1; | |
3570 | may_stop = may_stop_1; | |
3571 | update_observer_mode (); | |
3572 | } | |
3573 | ||
3574 | /* Set memory write permission independently of observer mode. */ | |
3575 | ||
3576 | static void | |
3577 | set_write_memory_permission (char *args, int from_tty, | |
3578 | struct cmd_list_element *c) | |
3579 | { | |
3580 | /* Make the real values match the user-changed values. */ | |
3581 | may_write_memory = may_write_memory_1; | |
3582 | update_observer_mode (); | |
3583 | } | |
3584 | ||
3585 | ||
c906108c | 3586 | void |
fba45db2 | 3587 | initialize_targets (void) |
c906108c SS |
3588 | { |
3589 | init_dummy_target (); | |
3590 | push_target (&dummy_target); | |
3591 | ||
3592 | add_info ("target", target_info, targ_desc); | |
3593 | add_info ("files", target_info, targ_desc); | |
3594 | ||
ccce17b0 | 3595 | add_setshow_zuinteger_cmd ("target", class_maintenance, &targetdebug, _("\ |
85c07804 AC |
3596 | Set target debugging."), _("\ |
3597 | Show target debugging."), _("\ | |
333dabeb | 3598 | When non-zero, target debugging is enabled. Higher numbers are more\n\ |
3cecbbbe TT |
3599 | verbose."), |
3600 | set_targetdebug, | |
ccce17b0 YQ |
3601 | show_targetdebug, |
3602 | &setdebuglist, &showdebuglist); | |
3a11626d | 3603 | |
2bc416ba | 3604 | add_setshow_boolean_cmd ("trust-readonly-sections", class_support, |
7915a72c AC |
3605 | &trust_readonly, _("\ |
3606 | Set mode for reading from readonly sections."), _("\ | |
3607 | Show mode for reading from readonly sections."), _("\ | |
3a11626d MS |
3608 | When this mode is on, memory reads from readonly sections (such as .text)\n\ |
3609 | will be read from the object file instead of from the target. This will\n\ | |
7915a72c | 3610 | result in significant performance improvement for remote targets."), |
2c5b56ce | 3611 | NULL, |
920d2a44 | 3612 | show_trust_readonly, |
e707bbc2 | 3613 | &setlist, &showlist); |
96baa820 JM |
3614 | |
3615 | add_com ("monitor", class_obscure, do_monitor_command, | |
1bedd215 | 3616 | _("Send a command to the remote monitor (remote targets only).")); |
96baa820 | 3617 | |
87680a14 JB |
3618 | add_cmd ("target-stack", class_maintenance, maintenance_print_target_stack, |
3619 | _("Print the name of each layer of the internal target stack."), | |
3620 | &maintenanceprintlist); | |
3621 | ||
c6ebd6cf VP |
3622 | add_setshow_boolean_cmd ("target-async", no_class, |
3623 | &target_async_permitted_1, _("\ | |
3624 | Set whether gdb controls the inferior in asynchronous mode."), _("\ | |
3625 | Show whether gdb controls the inferior in asynchronous mode."), _("\ | |
3626 | Tells gdb whether to control the inferior in asynchronous mode."), | |
329ea579 PA |
3627 | maint_set_target_async_command, |
3628 | maint_show_target_async_command, | |
3629 | &maintenance_set_cmdlist, | |
3630 | &maintenance_show_cmdlist); | |
c6ebd6cf | 3631 | |
d914c394 SS |
3632 | add_setshow_boolean_cmd ("may-write-registers", class_support, |
3633 | &may_write_registers_1, _("\ | |
3634 | Set permission to write into registers."), _("\ | |
3635 | Show permission to write into registers."), _("\ | |
3636 | When this permission is on, GDB may write into the target's registers.\n\ | |
3637 | Otherwise, any sort of write attempt will result in an error."), | |
3638 | set_target_permissions, NULL, | |
3639 | &setlist, &showlist); | |
3640 | ||
3641 | add_setshow_boolean_cmd ("may-write-memory", class_support, | |
3642 | &may_write_memory_1, _("\ | |
3643 | Set permission to write into target memory."), _("\ | |
3644 | Show permission to write into target memory."), _("\ | |
3645 | When this permission is on, GDB may write into the target's memory.\n\ | |
3646 | Otherwise, any sort of write attempt will result in an error."), | |
3647 | set_write_memory_permission, NULL, | |
3648 | &setlist, &showlist); | |
3649 | ||
3650 | add_setshow_boolean_cmd ("may-insert-breakpoints", class_support, | |
3651 | &may_insert_breakpoints_1, _("\ | |
3652 | Set permission to insert breakpoints in the target."), _("\ | |
3653 | Show permission to insert breakpoints in the target."), _("\ | |
3654 | When this permission is on, GDB may insert breakpoints in the program.\n\ | |
3655 | Otherwise, any sort of insertion attempt will result in an error."), | |
3656 | set_target_permissions, NULL, | |
3657 | &setlist, &showlist); | |
3658 | ||
3659 | add_setshow_boolean_cmd ("may-insert-tracepoints", class_support, | |
3660 | &may_insert_tracepoints_1, _("\ | |
3661 | Set permission to insert tracepoints in the target."), _("\ | |
3662 | Show permission to insert tracepoints in the target."), _("\ | |
3663 | When this permission is on, GDB may insert tracepoints in the program.\n\ | |
3664 | Otherwise, any sort of insertion attempt will result in an error."), | |
3665 | set_target_permissions, NULL, | |
3666 | &setlist, &showlist); | |
3667 | ||
3668 | add_setshow_boolean_cmd ("may-insert-fast-tracepoints", class_support, | |
3669 | &may_insert_fast_tracepoints_1, _("\ | |
3670 | Set permission to insert fast tracepoints in the target."), _("\ | |
3671 | Show permission to insert fast tracepoints in the target."), _("\ | |
3672 | When this permission is on, GDB may insert fast tracepoints.\n\ | |
3673 | Otherwise, any sort of insertion attempt will result in an error."), | |
3674 | set_target_permissions, NULL, | |
3675 | &setlist, &showlist); | |
3676 | ||
3677 | add_setshow_boolean_cmd ("may-interrupt", class_support, | |
3678 | &may_stop_1, _("\ | |
3679 | Set permission to interrupt or signal the target."), _("\ | |
3680 | Show permission to interrupt or signal the target."), _("\ | |
3681 | When this permission is on, GDB may interrupt/stop the target's execution.\n\ | |
3682 | Otherwise, any attempt to interrupt or stop will be ignored."), | |
3683 | set_target_permissions, NULL, | |
3684 | &setlist, &showlist); | |
6a3cb8e8 PA |
3685 | |
3686 | add_setshow_boolean_cmd ("auto-connect-native-target", class_support, | |
3687 | &auto_connect_native_target, _("\ | |
3688 | Set whether GDB may automatically connect to the native target."), _("\ | |
3689 | Show whether GDB may automatically connect to the native target."), _("\ | |
3690 | When on, and GDB is not connected to a target yet, GDB\n\ | |
3691 | attempts \"run\" and other commands with the native target."), | |
3692 | NULL, show_auto_connect_native_target, | |
3693 | &setlist, &showlist); | |
c906108c | 3694 | } |