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" | |
23 | #include <errno.h> | |
0e9f083f | 24 | #include <string.h> |
c906108c | 25 | #include "target.h" |
68c765e2 | 26 | #include "target-dcache.h" |
c906108c SS |
27 | #include "gdbcmd.h" |
28 | #include "symtab.h" | |
29 | #include "inferior.h" | |
45741a9c | 30 | #include "infrun.h" |
c906108c SS |
31 | #include "bfd.h" |
32 | #include "symfile.h" | |
33 | #include "objfiles.h" | |
4930751a | 34 | #include "dcache.h" |
c906108c | 35 | #include <signal.h> |
4e052eda | 36 | #include "regcache.h" |
0088c768 | 37 | #include "gdb_assert.h" |
b6591e8b | 38 | #include "gdbcore.h" |
9e35dae4 | 39 | #include "exceptions.h" |
424163ea | 40 | #include "target-descriptions.h" |
e1ac3328 | 41 | #include "gdbthread.h" |
b9db4ced | 42 | #include "solib.h" |
07b82ea5 | 43 | #include "exec.h" |
edb3359d | 44 | #include "inline-frame.h" |
2f4d8875 | 45 | #include "tracepoint.h" |
7313baad | 46 | #include "gdb/fileio.h" |
8ffcbaaf | 47 | #include "agent.h" |
8de71aab | 48 | #include "auxv.h" |
a7068b60 | 49 | #include "target-debug.h" |
c906108c | 50 | |
a14ed312 | 51 | static void target_info (char *, int); |
c906108c | 52 | |
f0f9ff95 TT |
53 | static void generic_tls_error (void) ATTRIBUTE_NORETURN; |
54 | ||
0a4f40a2 | 55 | static void default_terminal_info (struct target_ops *, const char *, int); |
c906108c | 56 | |
5009afc5 AS |
57 | static int default_watchpoint_addr_within_range (struct target_ops *, |
58 | CORE_ADDR, CORE_ADDR, int); | |
59 | ||
31568a15 TT |
60 | static int default_region_ok_for_hw_watchpoint (struct target_ops *, |
61 | CORE_ADDR, int); | |
e0d24f8d | 62 | |
a30bf1f1 | 63 | static void default_rcmd (struct target_ops *, const char *, struct ui_file *); |
a53f3625 | 64 | |
4229b31d TT |
65 | static ptid_t default_get_ada_task_ptid (struct target_ops *self, |
66 | long lwp, long tid); | |
67 | ||
098dba18 TT |
68 | static int default_follow_fork (struct target_ops *self, int follow_child, |
69 | int detach_fork); | |
70 | ||
8d657035 TT |
71 | static void default_mourn_inferior (struct target_ops *self); |
72 | ||
58a5184e TT |
73 | static int default_search_memory (struct target_ops *ops, |
74 | CORE_ADDR start_addr, | |
75 | ULONGEST search_space_len, | |
76 | const gdb_byte *pattern, | |
77 | ULONGEST pattern_len, | |
78 | CORE_ADDR *found_addrp); | |
79 | ||
936d2992 PA |
80 | static int default_verify_memory (struct target_ops *self, |
81 | const gdb_byte *data, | |
82 | CORE_ADDR memaddr, ULONGEST size); | |
83 | ||
8eaff7cd TT |
84 | static struct address_space *default_thread_address_space |
85 | (struct target_ops *self, ptid_t ptid); | |
86 | ||
c25c4a8b | 87 | static void tcomplain (void) ATTRIBUTE_NORETURN; |
c906108c | 88 | |
555bbdeb TT |
89 | static int return_zero (struct target_ops *); |
90 | ||
91 | static int return_zero_has_execution (struct target_ops *, ptid_t); | |
c906108c | 92 | |
a14ed312 | 93 | static void target_command (char *, int); |
c906108c | 94 | |
a14ed312 | 95 | static struct target_ops *find_default_run_target (char *); |
c906108c | 96 | |
c2250ad1 UW |
97 | static struct gdbarch *default_thread_architecture (struct target_ops *ops, |
98 | ptid_t ptid); | |
99 | ||
0b5a2719 TT |
100 | static int dummy_find_memory_regions (struct target_ops *self, |
101 | find_memory_region_ftype ignore1, | |
102 | void *ignore2); | |
103 | ||
16f796b1 TT |
104 | static char *dummy_make_corefile_notes (struct target_ops *self, |
105 | bfd *ignore1, int *ignore2); | |
106 | ||
770234d3 TT |
107 | static char *default_pid_to_str (struct target_ops *ops, ptid_t ptid); |
108 | ||
fe31bf5b TT |
109 | static enum exec_direction_kind default_execution_direction |
110 | (struct target_ops *self); | |
111 | ||
c0eca49f TT |
112 | static CORE_ADDR default_target_decr_pc_after_break (struct target_ops *ops, |
113 | struct gdbarch *gdbarch); | |
114 | ||
a7068b60 TT |
115 | static struct target_ops debug_target; |
116 | ||
1101cb7b TT |
117 | #include "target-delegates.c" |
118 | ||
a14ed312 | 119 | static void init_dummy_target (void); |
c906108c | 120 | |
c906108c | 121 | /* Pointer to array of target architecture structures; the size of the |
2bc416ba | 122 | array; the current index into the array; the allocated size of the |
c906108c SS |
123 | array. */ |
124 | struct target_ops **target_structs; | |
125 | unsigned target_struct_size; | |
c906108c SS |
126 | unsigned target_struct_allocsize; |
127 | #define DEFAULT_ALLOCSIZE 10 | |
128 | ||
129 | /* The initial current target, so that there is always a semi-valid | |
130 | current target. */ | |
131 | ||
132 | static struct target_ops dummy_target; | |
133 | ||
134 | /* Top of target stack. */ | |
135 | ||
258b763a | 136 | static struct target_ops *target_stack; |
c906108c SS |
137 | |
138 | /* The target structure we are currently using to talk to a process | |
139 | or file or whatever "inferior" we have. */ | |
140 | ||
141 | struct target_ops current_target; | |
142 | ||
143 | /* Command list for target. */ | |
144 | ||
145 | static struct cmd_list_element *targetlist = NULL; | |
146 | ||
cf7a04e8 DJ |
147 | /* Nonzero if we should trust readonly sections from the |
148 | executable when reading memory. */ | |
149 | ||
150 | static int trust_readonly = 0; | |
151 | ||
8defab1a DJ |
152 | /* Nonzero if we should show true memory content including |
153 | memory breakpoint inserted by gdb. */ | |
154 | ||
155 | static int show_memory_breakpoints = 0; | |
156 | ||
d914c394 SS |
157 | /* These globals control whether GDB attempts to perform these |
158 | operations; they are useful for targets that need to prevent | |
159 | inadvertant disruption, such as in non-stop mode. */ | |
160 | ||
161 | int may_write_registers = 1; | |
162 | ||
163 | int may_write_memory = 1; | |
164 | ||
165 | int may_insert_breakpoints = 1; | |
166 | ||
167 | int may_insert_tracepoints = 1; | |
168 | ||
169 | int may_insert_fast_tracepoints = 1; | |
170 | ||
171 | int may_stop = 1; | |
172 | ||
c906108c SS |
173 | /* Non-zero if we want to see trace of target level stuff. */ |
174 | ||
ccce17b0 | 175 | static unsigned int targetdebug = 0; |
920d2a44 AC |
176 | static void |
177 | show_targetdebug (struct ui_file *file, int from_tty, | |
178 | struct cmd_list_element *c, const char *value) | |
179 | { | |
180 | fprintf_filtered (file, _("Target debugging is %s.\n"), value); | |
181 | } | |
c906108c | 182 | |
a14ed312 | 183 | static void setup_target_debug (void); |
c906108c | 184 | |
c906108c SS |
185 | /* The user just typed 'target' without the name of a target. */ |
186 | ||
c906108c | 187 | static void |
fba45db2 | 188 | target_command (char *arg, int from_tty) |
c906108c SS |
189 | { |
190 | fputs_filtered ("Argument required (target name). Try `help target'\n", | |
191 | gdb_stdout); | |
192 | } | |
193 | ||
c35b1492 PA |
194 | /* Default target_has_* methods for process_stratum targets. */ |
195 | ||
196 | int | |
197 | default_child_has_all_memory (struct target_ops *ops) | |
198 | { | |
199 | /* If no inferior selected, then we can't read memory here. */ | |
200 | if (ptid_equal (inferior_ptid, null_ptid)) | |
201 | return 0; | |
202 | ||
203 | return 1; | |
204 | } | |
205 | ||
206 | int | |
207 | default_child_has_memory (struct target_ops *ops) | |
208 | { | |
209 | /* If no inferior selected, then we can't read memory here. */ | |
210 | if (ptid_equal (inferior_ptid, null_ptid)) | |
211 | return 0; | |
212 | ||
213 | return 1; | |
214 | } | |
215 | ||
216 | int | |
217 | default_child_has_stack (struct target_ops *ops) | |
218 | { | |
219 | /* If no inferior selected, there's no stack. */ | |
220 | if (ptid_equal (inferior_ptid, null_ptid)) | |
221 | return 0; | |
222 | ||
223 | return 1; | |
224 | } | |
225 | ||
226 | int | |
227 | default_child_has_registers (struct target_ops *ops) | |
228 | { | |
229 | /* Can't read registers from no inferior. */ | |
230 | if (ptid_equal (inferior_ptid, null_ptid)) | |
231 | return 0; | |
232 | ||
233 | return 1; | |
234 | } | |
235 | ||
236 | int | |
aeaec162 | 237 | default_child_has_execution (struct target_ops *ops, ptid_t the_ptid) |
c35b1492 PA |
238 | { |
239 | /* If there's no thread selected, then we can't make it run through | |
240 | hoops. */ | |
aeaec162 | 241 | if (ptid_equal (the_ptid, null_ptid)) |
c35b1492 PA |
242 | return 0; |
243 | ||
244 | return 1; | |
245 | } | |
246 | ||
247 | ||
248 | int | |
249 | target_has_all_memory_1 (void) | |
250 | { | |
251 | struct target_ops *t; | |
252 | ||
253 | for (t = current_target.beneath; t != NULL; t = t->beneath) | |
254 | if (t->to_has_all_memory (t)) | |
255 | return 1; | |
256 | ||
257 | return 0; | |
258 | } | |
259 | ||
260 | int | |
261 | target_has_memory_1 (void) | |
262 | { | |
263 | struct target_ops *t; | |
264 | ||
265 | for (t = current_target.beneath; t != NULL; t = t->beneath) | |
266 | if (t->to_has_memory (t)) | |
267 | return 1; | |
268 | ||
269 | return 0; | |
270 | } | |
271 | ||
272 | int | |
273 | target_has_stack_1 (void) | |
274 | { | |
275 | struct target_ops *t; | |
276 | ||
277 | for (t = current_target.beneath; t != NULL; t = t->beneath) | |
278 | if (t->to_has_stack (t)) | |
279 | return 1; | |
280 | ||
281 | return 0; | |
282 | } | |
283 | ||
284 | int | |
285 | target_has_registers_1 (void) | |
286 | { | |
287 | struct target_ops *t; | |
288 | ||
289 | for (t = current_target.beneath; t != NULL; t = t->beneath) | |
290 | if (t->to_has_registers (t)) | |
291 | return 1; | |
292 | ||
293 | return 0; | |
294 | } | |
295 | ||
296 | int | |
aeaec162 | 297 | target_has_execution_1 (ptid_t the_ptid) |
c35b1492 PA |
298 | { |
299 | struct target_ops *t; | |
300 | ||
301 | for (t = current_target.beneath; t != NULL; t = t->beneath) | |
aeaec162 | 302 | if (t->to_has_execution (t, the_ptid)) |
c35b1492 PA |
303 | return 1; |
304 | ||
305 | return 0; | |
306 | } | |
307 | ||
aeaec162 TT |
308 | int |
309 | target_has_execution_current (void) | |
310 | { | |
311 | return target_has_execution_1 (inferior_ptid); | |
312 | } | |
313 | ||
c22a2b88 TT |
314 | /* Complete initialization of T. This ensures that various fields in |
315 | T are set, if needed by the target implementation. */ | |
c906108c SS |
316 | |
317 | void | |
c22a2b88 | 318 | complete_target_initialization (struct target_ops *t) |
c906108c | 319 | { |
0088c768 | 320 | /* Provide default values for all "must have" methods. */ |
0088c768 | 321 | |
c35b1492 | 322 | if (t->to_has_all_memory == NULL) |
555bbdeb | 323 | t->to_has_all_memory = return_zero; |
c35b1492 PA |
324 | |
325 | if (t->to_has_memory == NULL) | |
555bbdeb | 326 | t->to_has_memory = return_zero; |
c35b1492 PA |
327 | |
328 | if (t->to_has_stack == NULL) | |
555bbdeb | 329 | t->to_has_stack = return_zero; |
c35b1492 PA |
330 | |
331 | if (t->to_has_registers == NULL) | |
555bbdeb | 332 | t->to_has_registers = return_zero; |
c35b1492 PA |
333 | |
334 | if (t->to_has_execution == NULL) | |
555bbdeb | 335 | t->to_has_execution = return_zero_has_execution; |
1101cb7b | 336 | |
b3ccfe11 TT |
337 | /* These methods can be called on an unpushed target and so require |
338 | a default implementation if the target might plausibly be the | |
339 | default run target. */ | |
340 | gdb_assert (t->to_can_run == NULL || (t->to_can_async_p != NULL | |
341 | && t->to_supports_non_stop != NULL)); | |
342 | ||
1101cb7b | 343 | install_delegators (t); |
c22a2b88 TT |
344 | } |
345 | ||
8981c758 TT |
346 | /* This is used to implement the various target commands. */ |
347 | ||
348 | static void | |
349 | open_target (char *args, int from_tty, struct cmd_list_element *command) | |
350 | { | |
351 | struct target_ops *ops = get_cmd_context (command); | |
352 | ||
353 | if (targetdebug) | |
354 | fprintf_unfiltered (gdb_stdlog, "-> %s->to_open (...)\n", | |
355 | ops->to_shortname); | |
356 | ||
357 | ops->to_open (args, from_tty); | |
358 | ||
359 | if (targetdebug) | |
360 | fprintf_unfiltered (gdb_stdlog, "<- %s->to_open (%s, %d)\n", | |
361 | ops->to_shortname, args, from_tty); | |
362 | } | |
363 | ||
c22a2b88 TT |
364 | /* Add possible target architecture T to the list and add a new |
365 | command 'target T->to_shortname'. Set COMPLETER as the command's | |
366 | completer if not NULL. */ | |
367 | ||
368 | void | |
369 | add_target_with_completer (struct target_ops *t, | |
370 | completer_ftype *completer) | |
371 | { | |
372 | struct cmd_list_element *c; | |
373 | ||
374 | complete_target_initialization (t); | |
c35b1492 | 375 | |
c906108c SS |
376 | if (!target_structs) |
377 | { | |
378 | target_struct_allocsize = DEFAULT_ALLOCSIZE; | |
379 | target_structs = (struct target_ops **) xmalloc | |
380 | (target_struct_allocsize * sizeof (*target_structs)); | |
381 | } | |
382 | if (target_struct_size >= target_struct_allocsize) | |
383 | { | |
384 | target_struct_allocsize *= 2; | |
385 | target_structs = (struct target_ops **) | |
c5aa993b JM |
386 | xrealloc ((char *) target_structs, |
387 | target_struct_allocsize * sizeof (*target_structs)); | |
c906108c SS |
388 | } |
389 | target_structs[target_struct_size++] = t; | |
c906108c SS |
390 | |
391 | if (targetlist == NULL) | |
1bedd215 AC |
392 | add_prefix_cmd ("target", class_run, target_command, _("\ |
393 | Connect to a target machine or process.\n\ | |
c906108c SS |
394 | The first argument is the type or protocol of the target machine.\n\ |
395 | Remaining arguments are interpreted by the target protocol. For more\n\ | |
396 | information on the arguments for a particular protocol, type\n\ | |
1bedd215 | 397 | `help target ' followed by the protocol name."), |
c906108c | 398 | &targetlist, "target ", 0, &cmdlist); |
8981c758 TT |
399 | c = add_cmd (t->to_shortname, no_class, NULL, t->to_doc, &targetlist); |
400 | set_cmd_sfunc (c, open_target); | |
401 | set_cmd_context (c, t); | |
9852c492 YQ |
402 | if (completer != NULL) |
403 | set_cmd_completer (c, completer); | |
404 | } | |
405 | ||
406 | /* Add a possible target architecture to the list. */ | |
407 | ||
408 | void | |
409 | add_target (struct target_ops *t) | |
410 | { | |
411 | add_target_with_completer (t, NULL); | |
c906108c SS |
412 | } |
413 | ||
b48d48eb MM |
414 | /* See target.h. */ |
415 | ||
416 | void | |
417 | add_deprecated_target_alias (struct target_ops *t, char *alias) | |
418 | { | |
419 | struct cmd_list_element *c; | |
420 | char *alt; | |
421 | ||
422 | /* If we use add_alias_cmd, here, we do not get the deprecated warning, | |
423 | see PR cli/15104. */ | |
8981c758 TT |
424 | c = add_cmd (alias, no_class, NULL, t->to_doc, &targetlist); |
425 | set_cmd_sfunc (c, open_target); | |
426 | set_cmd_context (c, t); | |
b48d48eb MM |
427 | alt = xstrprintf ("target %s", t->to_shortname); |
428 | deprecate_cmd (c, alt); | |
429 | } | |
430 | ||
c906108c SS |
431 | /* Stub functions */ |
432 | ||
7d85a9c0 JB |
433 | void |
434 | target_kill (void) | |
435 | { | |
423a4807 | 436 | current_target.to_kill (¤t_target); |
7d85a9c0 JB |
437 | } |
438 | ||
11cf8741 | 439 | void |
9cbe5fff | 440 | target_load (const char *arg, int from_tty) |
11cf8741 | 441 | { |
4e5d721f | 442 | target_dcache_invalidate (); |
71a9f134 | 443 | (*current_target.to_load) (¤t_target, arg, from_tty); |
11cf8741 JM |
444 | } |
445 | ||
d9d2d8b6 PA |
446 | void |
447 | target_terminal_inferior (void) | |
448 | { | |
449 | /* A background resume (``run&'') should leave GDB in control of the | |
c378eb4e | 450 | terminal. Use target_can_async_p, not target_is_async_p, since at |
ba7f6c64 VP |
451 | this point the target is not async yet. However, if sync_execution |
452 | is not set, we know it will become async prior to resume. */ | |
453 | if (target_can_async_p () && !sync_execution) | |
d9d2d8b6 PA |
454 | return; |
455 | ||
456 | /* If GDB is resuming the inferior in the foreground, install | |
457 | inferior's terminal modes. */ | |
d2f640d4 | 458 | (*current_target.to_terminal_inferior) (¤t_target); |
d9d2d8b6 | 459 | } |
136d6dae | 460 | |
b0ed115f TT |
461 | /* See target.h. */ |
462 | ||
463 | int | |
464 | target_supports_terminal_ours (void) | |
465 | { | |
466 | struct target_ops *t; | |
467 | ||
468 | for (t = current_target.beneath; t != NULL; t = t->beneath) | |
469 | { | |
470 | if (t->to_terminal_ours != delegate_terminal_ours | |
471 | && t->to_terminal_ours != tdefault_terminal_ours) | |
472 | return 1; | |
473 | } | |
474 | ||
475 | return 0; | |
476 | } | |
477 | ||
c906108c | 478 | static void |
fba45db2 | 479 | tcomplain (void) |
c906108c | 480 | { |
8a3fe4f8 | 481 | error (_("You can't do that when your target is `%s'"), |
c906108c SS |
482 | current_target.to_shortname); |
483 | } | |
484 | ||
485 | void | |
fba45db2 | 486 | noprocess (void) |
c906108c | 487 | { |
8a3fe4f8 | 488 | error (_("You can't do that without a process to debug.")); |
c906108c SS |
489 | } |
490 | ||
c906108c | 491 | static void |
0a4f40a2 | 492 | default_terminal_info (struct target_ops *self, const char *args, int from_tty) |
c906108c | 493 | { |
a3f17187 | 494 | printf_unfiltered (_("No saved terminal information.\n")); |
c906108c SS |
495 | } |
496 | ||
0ef643c8 JB |
497 | /* A default implementation for the to_get_ada_task_ptid target method. |
498 | ||
499 | This function builds the PTID by using both LWP and TID as part of | |
500 | the PTID lwp and tid elements. The pid used is the pid of the | |
501 | inferior_ptid. */ | |
502 | ||
2c0b251b | 503 | static ptid_t |
1e6b91a4 | 504 | default_get_ada_task_ptid (struct target_ops *self, long lwp, long tid) |
0ef643c8 JB |
505 | { |
506 | return ptid_build (ptid_get_pid (inferior_ptid), lwp, tid); | |
507 | } | |
508 | ||
32231432 | 509 | static enum exec_direction_kind |
4c612759 | 510 | default_execution_direction (struct target_ops *self) |
32231432 PA |
511 | { |
512 | if (!target_can_execute_reverse) | |
513 | return EXEC_FORWARD; | |
514 | else if (!target_can_async_p ()) | |
515 | return EXEC_FORWARD; | |
516 | else | |
517 | gdb_assert_not_reached ("\ | |
518 | to_execution_direction must be implemented for reverse async"); | |
519 | } | |
520 | ||
7998dfc3 AC |
521 | /* Go through the target stack from top to bottom, copying over zero |
522 | entries in current_target, then filling in still empty entries. In | |
523 | effect, we are doing class inheritance through the pushed target | |
524 | vectors. | |
525 | ||
526 | NOTE: cagney/2003-10-17: The problem with this inheritance, as it | |
527 | is currently implemented, is that it discards any knowledge of | |
528 | which target an inherited method originally belonged to. | |
529 | Consequently, new new target methods should instead explicitly and | |
530 | locally search the target stack for the target that can handle the | |
531 | request. */ | |
c906108c SS |
532 | |
533 | static void | |
7998dfc3 | 534 | update_current_target (void) |
c906108c | 535 | { |
7998dfc3 AC |
536 | struct target_ops *t; |
537 | ||
08d8bcd7 | 538 | /* First, reset current's contents. */ |
7998dfc3 AC |
539 | memset (¤t_target, 0, sizeof (current_target)); |
540 | ||
1101cb7b TT |
541 | /* Install the delegators. */ |
542 | install_delegators (¤t_target); | |
543 | ||
be4ddd36 TT |
544 | current_target.to_stratum = target_stack->to_stratum; |
545 | ||
7998dfc3 AC |
546 | #define INHERIT(FIELD, TARGET) \ |
547 | if (!current_target.FIELD) \ | |
548 | current_target.FIELD = (TARGET)->FIELD | |
549 | ||
be4ddd36 TT |
550 | /* Do not add any new INHERITs here. Instead, use the delegation |
551 | mechanism provided by make-target-delegates. */ | |
7998dfc3 AC |
552 | for (t = target_stack; t; t = t->beneath) |
553 | { | |
554 | INHERIT (to_shortname, t); | |
555 | INHERIT (to_longname, t); | |
dc177b7a | 556 | INHERIT (to_attach_no_wait, t); |
74174d2e | 557 | INHERIT (to_have_steppable_watchpoint, t); |
7998dfc3 | 558 | INHERIT (to_have_continuable_watchpoint, t); |
7998dfc3 | 559 | INHERIT (to_has_thread_control, t); |
7998dfc3 AC |
560 | } |
561 | #undef INHERIT | |
562 | ||
7998dfc3 AC |
563 | /* Finally, position the target-stack beneath the squashed |
564 | "current_target". That way code looking for a non-inherited | |
565 | target method can quickly and simply find it. */ | |
566 | current_target.beneath = target_stack; | |
b4b61fdb DJ |
567 | |
568 | if (targetdebug) | |
569 | setup_target_debug (); | |
c906108c SS |
570 | } |
571 | ||
572 | /* Push a new target type into the stack of the existing target accessors, | |
573 | possibly superseding some of the existing accessors. | |
574 | ||
c906108c SS |
575 | Rather than allow an empty stack, we always have the dummy target at |
576 | the bottom stratum, so we can call the function vectors without | |
577 | checking them. */ | |
578 | ||
b26a4dcb | 579 | void |
fba45db2 | 580 | push_target (struct target_ops *t) |
c906108c | 581 | { |
258b763a | 582 | struct target_ops **cur; |
c906108c SS |
583 | |
584 | /* Check magic number. If wrong, it probably means someone changed | |
585 | the struct definition, but not all the places that initialize one. */ | |
586 | if (t->to_magic != OPS_MAGIC) | |
587 | { | |
c5aa993b JM |
588 | fprintf_unfiltered (gdb_stderr, |
589 | "Magic number of %s target struct wrong\n", | |
590 | t->to_shortname); | |
3e43a32a MS |
591 | internal_error (__FILE__, __LINE__, |
592 | _("failed internal consistency check")); | |
c906108c SS |
593 | } |
594 | ||
258b763a AC |
595 | /* Find the proper stratum to install this target in. */ |
596 | for (cur = &target_stack; (*cur) != NULL; cur = &(*cur)->beneath) | |
c906108c | 597 | { |
258b763a | 598 | if ((int) (t->to_stratum) >= (int) (*cur)->to_stratum) |
c906108c SS |
599 | break; |
600 | } | |
601 | ||
258b763a | 602 | /* If there's already targets at this stratum, remove them. */ |
88c231eb | 603 | /* FIXME: cagney/2003-10-15: I think this should be popping all |
258b763a AC |
604 | targets to CUR, and not just those at this stratum level. */ |
605 | while ((*cur) != NULL && t->to_stratum == (*cur)->to_stratum) | |
606 | { | |
607 | /* There's already something at this stratum level. Close it, | |
608 | and un-hook it from the stack. */ | |
609 | struct target_ops *tmp = (*cur); | |
5d502164 | 610 | |
258b763a AC |
611 | (*cur) = (*cur)->beneath; |
612 | tmp->beneath = NULL; | |
460014f5 | 613 | target_close (tmp); |
258b763a | 614 | } |
c906108c SS |
615 | |
616 | /* We have removed all targets in our stratum, now add the new one. */ | |
258b763a AC |
617 | t->beneath = (*cur); |
618 | (*cur) = t; | |
c906108c SS |
619 | |
620 | update_current_target (); | |
c906108c SS |
621 | } |
622 | ||
2bc416ba | 623 | /* Remove a target_ops vector from the stack, wherever it may be. |
c906108c SS |
624 | Return how many times it was removed (0 or 1). */ |
625 | ||
626 | int | |
fba45db2 | 627 | unpush_target (struct target_ops *t) |
c906108c | 628 | { |
258b763a AC |
629 | struct target_ops **cur; |
630 | struct target_ops *tmp; | |
c906108c | 631 | |
c8d104ad PA |
632 | if (t->to_stratum == dummy_stratum) |
633 | internal_error (__FILE__, __LINE__, | |
9b20d036 | 634 | _("Attempt to unpush the dummy target")); |
c8d104ad | 635 | |
c906108c | 636 | /* Look for the specified target. Note that we assume that a target |
c378eb4e | 637 | can only occur once in the target stack. */ |
c906108c | 638 | |
258b763a AC |
639 | for (cur = &target_stack; (*cur) != NULL; cur = &(*cur)->beneath) |
640 | { | |
641 | if ((*cur) == t) | |
642 | break; | |
643 | } | |
c906108c | 644 | |
305436e0 PA |
645 | /* If we don't find target_ops, quit. Only open targets should be |
646 | closed. */ | |
258b763a | 647 | if ((*cur) == NULL) |
305436e0 | 648 | return 0; |
5269965e | 649 | |
c378eb4e | 650 | /* Unchain the target. */ |
258b763a AC |
651 | tmp = (*cur); |
652 | (*cur) = (*cur)->beneath; | |
653 | tmp->beneath = NULL; | |
c906108c SS |
654 | |
655 | update_current_target (); | |
c906108c | 656 | |
305436e0 PA |
657 | /* Finally close the target. Note we do this after unchaining, so |
658 | any target method calls from within the target_close | |
659 | implementation don't end up in T anymore. */ | |
460014f5 | 660 | target_close (t); |
305436e0 | 661 | |
c906108c SS |
662 | return 1; |
663 | } | |
664 | ||
aa76d38d | 665 | void |
460014f5 | 666 | pop_all_targets_above (enum strata above_stratum) |
aa76d38d | 667 | { |
87ab71f0 | 668 | while ((int) (current_target.to_stratum) > (int) above_stratum) |
aa76d38d | 669 | { |
aa76d38d PA |
670 | if (!unpush_target (target_stack)) |
671 | { | |
672 | fprintf_unfiltered (gdb_stderr, | |
673 | "pop_all_targets couldn't find target %s\n", | |
b52323fa | 674 | target_stack->to_shortname); |
aa76d38d PA |
675 | internal_error (__FILE__, __LINE__, |
676 | _("failed internal consistency check")); | |
677 | break; | |
678 | } | |
679 | } | |
680 | } | |
681 | ||
87ab71f0 | 682 | void |
460014f5 | 683 | pop_all_targets (void) |
87ab71f0 | 684 | { |
460014f5 | 685 | pop_all_targets_above (dummy_stratum); |
87ab71f0 PA |
686 | } |
687 | ||
c0edd9ed JK |
688 | /* Return 1 if T is now pushed in the target stack. Return 0 otherwise. */ |
689 | ||
690 | int | |
691 | target_is_pushed (struct target_ops *t) | |
692 | { | |
84202f9c | 693 | struct target_ops *cur; |
c0edd9ed JK |
694 | |
695 | /* Check magic number. If wrong, it probably means someone changed | |
696 | the struct definition, but not all the places that initialize one. */ | |
697 | if (t->to_magic != OPS_MAGIC) | |
698 | { | |
699 | fprintf_unfiltered (gdb_stderr, | |
700 | "Magic number of %s target struct wrong\n", | |
701 | t->to_shortname); | |
3e43a32a MS |
702 | internal_error (__FILE__, __LINE__, |
703 | _("failed internal consistency check")); | |
c0edd9ed JK |
704 | } |
705 | ||
84202f9c TT |
706 | for (cur = target_stack; cur != NULL; cur = cur->beneath) |
707 | if (cur == t) | |
c0edd9ed JK |
708 | return 1; |
709 | ||
710 | return 0; | |
711 | } | |
712 | ||
f0f9ff95 TT |
713 | /* Default implementation of to_get_thread_local_address. */ |
714 | ||
715 | static void | |
716 | generic_tls_error (void) | |
717 | { | |
718 | throw_error (TLS_GENERIC_ERROR, | |
719 | _("Cannot find thread-local variables on this target")); | |
720 | } | |
721 | ||
72f5cf0e | 722 | /* Using the objfile specified in OBJFILE, find the address for the |
9e35dae4 DJ |
723 | current thread's thread-local storage with offset OFFSET. */ |
724 | CORE_ADDR | |
725 | target_translate_tls_address (struct objfile *objfile, CORE_ADDR offset) | |
726 | { | |
727 | volatile CORE_ADDR addr = 0; | |
f0f9ff95 | 728 | struct target_ops *target = ¤t_target; |
9e35dae4 | 729 | |
f0f9ff95 | 730 | if (gdbarch_fetch_tls_load_module_address_p (target_gdbarch ())) |
9e35dae4 DJ |
731 | { |
732 | ptid_t ptid = inferior_ptid; | |
733 | volatile struct gdb_exception ex; | |
734 | ||
735 | TRY_CATCH (ex, RETURN_MASK_ALL) | |
736 | { | |
737 | CORE_ADDR lm_addr; | |
738 | ||
739 | /* Fetch the load module address for this objfile. */ | |
f5656ead | 740 | lm_addr = gdbarch_fetch_tls_load_module_address (target_gdbarch (), |
9e35dae4 | 741 | objfile); |
9e35dae4 | 742 | |
3e43a32a MS |
743 | addr = target->to_get_thread_local_address (target, ptid, |
744 | lm_addr, offset); | |
9e35dae4 DJ |
745 | } |
746 | /* If an error occurred, print TLS related messages here. Otherwise, | |
747 | throw the error to some higher catcher. */ | |
748 | if (ex.reason < 0) | |
749 | { | |
750 | int objfile_is_library = (objfile->flags & OBJF_SHARED); | |
751 | ||
752 | switch (ex.error) | |
753 | { | |
754 | case TLS_NO_LIBRARY_SUPPORT_ERROR: | |
3e43a32a MS |
755 | error (_("Cannot find thread-local variables " |
756 | "in this thread library.")); | |
9e35dae4 DJ |
757 | break; |
758 | case TLS_LOAD_MODULE_NOT_FOUND_ERROR: | |
759 | if (objfile_is_library) | |
760 | error (_("Cannot find shared library `%s' in dynamic" | |
4262abfb | 761 | " linker's load module list"), objfile_name (objfile)); |
9e35dae4 DJ |
762 | else |
763 | error (_("Cannot find executable file `%s' in dynamic" | |
4262abfb | 764 | " linker's load module list"), objfile_name (objfile)); |
9e35dae4 DJ |
765 | break; |
766 | case TLS_NOT_ALLOCATED_YET_ERROR: | |
767 | if (objfile_is_library) | |
768 | error (_("The inferior has not yet allocated storage for" | |
769 | " thread-local variables in\n" | |
770 | "the shared library `%s'\n" | |
771 | "for %s"), | |
4262abfb | 772 | objfile_name (objfile), target_pid_to_str (ptid)); |
9e35dae4 DJ |
773 | else |
774 | error (_("The inferior has not yet allocated storage for" | |
775 | " thread-local variables in\n" | |
776 | "the executable `%s'\n" | |
777 | "for %s"), | |
4262abfb | 778 | objfile_name (objfile), target_pid_to_str (ptid)); |
9e35dae4 DJ |
779 | break; |
780 | case TLS_GENERIC_ERROR: | |
781 | if (objfile_is_library) | |
782 | error (_("Cannot find thread-local storage for %s, " | |
783 | "shared library %s:\n%s"), | |
784 | target_pid_to_str (ptid), | |
4262abfb | 785 | objfile_name (objfile), ex.message); |
9e35dae4 DJ |
786 | else |
787 | error (_("Cannot find thread-local storage for %s, " | |
788 | "executable file %s:\n%s"), | |
789 | target_pid_to_str (ptid), | |
4262abfb | 790 | objfile_name (objfile), ex.message); |
9e35dae4 DJ |
791 | break; |
792 | default: | |
793 | throw_exception (ex); | |
794 | break; | |
795 | } | |
796 | } | |
797 | } | |
798 | /* It wouldn't be wrong here to try a gdbarch method, too; finding | |
799 | TLS is an ABI-specific thing. But we don't do that yet. */ | |
800 | else | |
801 | error (_("Cannot find thread-local variables on this target")); | |
802 | ||
803 | return addr; | |
804 | } | |
805 | ||
6be7b56e | 806 | const char * |
01cb8804 | 807 | target_xfer_status_to_string (enum target_xfer_status status) |
6be7b56e PA |
808 | { |
809 | #define CASE(X) case X: return #X | |
01cb8804 | 810 | switch (status) |
6be7b56e PA |
811 | { |
812 | CASE(TARGET_XFER_E_IO); | |
bc113b4e | 813 | CASE(TARGET_XFER_UNAVAILABLE); |
6be7b56e PA |
814 | default: |
815 | return "<unknown>"; | |
816 | } | |
817 | #undef CASE | |
818 | }; | |
819 | ||
820 | ||
c906108c SS |
821 | #undef MIN |
822 | #define MIN(A, B) (((A) <= (B)) ? (A) : (B)) | |
823 | ||
824 | /* target_read_string -- read a null terminated string, up to LEN bytes, | |
825 | from MEMADDR in target. Set *ERRNOP to the errno code, or 0 if successful. | |
826 | Set *STRING to a pointer to malloc'd memory containing the data; the caller | |
827 | is responsible for freeing it. Return the number of bytes successfully | |
828 | read. */ | |
829 | ||
830 | int | |
fba45db2 | 831 | target_read_string (CORE_ADDR memaddr, char **string, int len, int *errnop) |
c906108c | 832 | { |
c2e8b827 | 833 | int tlen, offset, i; |
1b0ba102 | 834 | gdb_byte buf[4]; |
c906108c SS |
835 | int errcode = 0; |
836 | char *buffer; | |
837 | int buffer_allocated; | |
838 | char *bufptr; | |
839 | unsigned int nbytes_read = 0; | |
840 | ||
6217bf3e MS |
841 | gdb_assert (string); |
842 | ||
c906108c SS |
843 | /* Small for testing. */ |
844 | buffer_allocated = 4; | |
845 | buffer = xmalloc (buffer_allocated); | |
846 | bufptr = buffer; | |
847 | ||
c906108c SS |
848 | while (len > 0) |
849 | { | |
850 | tlen = MIN (len, 4 - (memaddr & 3)); | |
851 | offset = memaddr & 3; | |
852 | ||
1b0ba102 | 853 | errcode = target_read_memory (memaddr & ~3, buf, sizeof buf); |
c906108c SS |
854 | if (errcode != 0) |
855 | { | |
856 | /* The transfer request might have crossed the boundary to an | |
c378eb4e | 857 | unallocated region of memory. Retry the transfer, requesting |
c906108c SS |
858 | a single byte. */ |
859 | tlen = 1; | |
860 | offset = 0; | |
b8eb5af0 | 861 | errcode = target_read_memory (memaddr, buf, 1); |
c906108c SS |
862 | if (errcode != 0) |
863 | goto done; | |
864 | } | |
865 | ||
866 | if (bufptr - buffer + tlen > buffer_allocated) | |
867 | { | |
868 | unsigned int bytes; | |
5d502164 | 869 | |
c906108c SS |
870 | bytes = bufptr - buffer; |
871 | buffer_allocated *= 2; | |
872 | buffer = xrealloc (buffer, buffer_allocated); | |
873 | bufptr = buffer + bytes; | |
874 | } | |
875 | ||
876 | for (i = 0; i < tlen; i++) | |
877 | { | |
878 | *bufptr++ = buf[i + offset]; | |
879 | if (buf[i + offset] == '\000') | |
880 | { | |
881 | nbytes_read += i + 1; | |
882 | goto done; | |
883 | } | |
884 | } | |
885 | ||
886 | memaddr += tlen; | |
887 | len -= tlen; | |
888 | nbytes_read += tlen; | |
889 | } | |
c5aa993b | 890 | done: |
6217bf3e | 891 | *string = buffer; |
c906108c SS |
892 | if (errnop != NULL) |
893 | *errnop = errcode; | |
c906108c SS |
894 | return nbytes_read; |
895 | } | |
896 | ||
07b82ea5 PA |
897 | struct target_section_table * |
898 | target_get_section_table (struct target_ops *target) | |
899 | { | |
7e35c012 | 900 | return (*target->to_get_section_table) (target); |
07b82ea5 PA |
901 | } |
902 | ||
8db32d44 | 903 | /* Find a section containing ADDR. */ |
07b82ea5 | 904 | |
0542c86d | 905 | struct target_section * |
8db32d44 AC |
906 | target_section_by_addr (struct target_ops *target, CORE_ADDR addr) |
907 | { | |
07b82ea5 | 908 | struct target_section_table *table = target_get_section_table (target); |
0542c86d | 909 | struct target_section *secp; |
07b82ea5 PA |
910 | |
911 | if (table == NULL) | |
912 | return NULL; | |
913 | ||
914 | for (secp = table->sections; secp < table->sections_end; secp++) | |
8db32d44 AC |
915 | { |
916 | if (addr >= secp->addr && addr < secp->endaddr) | |
917 | return secp; | |
918 | } | |
919 | return NULL; | |
920 | } | |
921 | ||
9f713294 YQ |
922 | /* Read memory from more than one valid target. A core file, for |
923 | instance, could have some of memory but delegate other bits to | |
924 | the target below it. So, we must manually try all targets. */ | |
925 | ||
9b409511 | 926 | static enum target_xfer_status |
17fde6d0 | 927 | raw_memory_xfer_partial (struct target_ops *ops, gdb_byte *readbuf, |
9b409511 YQ |
928 | const gdb_byte *writebuf, ULONGEST memaddr, LONGEST len, |
929 | ULONGEST *xfered_len) | |
9f713294 | 930 | { |
9b409511 | 931 | enum target_xfer_status res; |
9f713294 YQ |
932 | |
933 | do | |
934 | { | |
935 | res = ops->to_xfer_partial (ops, TARGET_OBJECT_MEMORY, NULL, | |
9b409511 YQ |
936 | readbuf, writebuf, memaddr, len, |
937 | xfered_len); | |
938 | if (res == TARGET_XFER_OK) | |
9f713294 YQ |
939 | break; |
940 | ||
633785ff | 941 | /* Stop if the target reports that the memory is not available. */ |
bc113b4e | 942 | if (res == TARGET_XFER_UNAVAILABLE) |
633785ff MM |
943 | break; |
944 | ||
9f713294 YQ |
945 | /* We want to continue past core files to executables, but not |
946 | past a running target's memory. */ | |
947 | if (ops->to_has_all_memory (ops)) | |
948 | break; | |
949 | ||
950 | ops = ops->beneath; | |
951 | } | |
952 | while (ops != NULL); | |
953 | ||
0f26cec1 PA |
954 | /* The cache works at the raw memory level. Make sure the cache |
955 | gets updated with raw contents no matter what kind of memory | |
956 | object was originally being written. Note we do write-through | |
957 | first, so that if it fails, we don't write to the cache contents | |
958 | that never made it to the target. */ | |
959 | if (writebuf != NULL | |
960 | && !ptid_equal (inferior_ptid, null_ptid) | |
961 | && target_dcache_init_p () | |
962 | && (stack_cache_enabled_p () || code_cache_enabled_p ())) | |
963 | { | |
964 | DCACHE *dcache = target_dcache_get (); | |
965 | ||
966 | /* Note that writing to an area of memory which wasn't present | |
967 | in the cache doesn't cause it to be loaded in. */ | |
968 | dcache_update (dcache, res, memaddr, writebuf, *xfered_len); | |
969 | } | |
970 | ||
9f713294 YQ |
971 | return res; |
972 | } | |
973 | ||
7f79c47e DE |
974 | /* Perform a partial memory transfer. |
975 | For docs see target.h, to_xfer_partial. */ | |
cf7a04e8 | 976 | |
9b409511 | 977 | static enum target_xfer_status |
f0ba3972 | 978 | memory_xfer_partial_1 (struct target_ops *ops, enum target_object object, |
17fde6d0 | 979 | gdb_byte *readbuf, const gdb_byte *writebuf, ULONGEST memaddr, |
9b409511 | 980 | ULONGEST len, ULONGEST *xfered_len) |
0779438d | 981 | { |
9b409511 | 982 | enum target_xfer_status res; |
cf7a04e8 DJ |
983 | int reg_len; |
984 | struct mem_region *region; | |
4e5d721f | 985 | struct inferior *inf; |
cf7a04e8 | 986 | |
07b82ea5 PA |
987 | /* For accesses to unmapped overlay sections, read directly from |
988 | files. Must do this first, as MEMADDR may need adjustment. */ | |
989 | if (readbuf != NULL && overlay_debugging) | |
990 | { | |
991 | struct obj_section *section = find_pc_overlay (memaddr); | |
5d502164 | 992 | |
07b82ea5 PA |
993 | if (pc_in_unmapped_range (memaddr, section)) |
994 | { | |
995 | struct target_section_table *table | |
996 | = target_get_section_table (ops); | |
997 | const char *section_name = section->the_bfd_section->name; | |
5d502164 | 998 | |
07b82ea5 PA |
999 | memaddr = overlay_mapped_address (memaddr, section); |
1000 | return section_table_xfer_memory_partial (readbuf, writebuf, | |
9b409511 | 1001 | memaddr, len, xfered_len, |
07b82ea5 PA |
1002 | table->sections, |
1003 | table->sections_end, | |
1004 | section_name); | |
1005 | } | |
1006 | } | |
1007 | ||
1008 | /* Try the executable files, if "trust-readonly-sections" is set. */ | |
cf7a04e8 DJ |
1009 | if (readbuf != NULL && trust_readonly) |
1010 | { | |
0542c86d | 1011 | struct target_section *secp; |
07b82ea5 | 1012 | struct target_section_table *table; |
cf7a04e8 DJ |
1013 | |
1014 | secp = target_section_by_addr (ops, memaddr); | |
1015 | if (secp != NULL | |
2b2848e2 DE |
1016 | && (bfd_get_section_flags (secp->the_bfd_section->owner, |
1017 | secp->the_bfd_section) | |
cf7a04e8 | 1018 | & SEC_READONLY)) |
07b82ea5 PA |
1019 | { |
1020 | table = target_get_section_table (ops); | |
1021 | return section_table_xfer_memory_partial (readbuf, writebuf, | |
9b409511 | 1022 | memaddr, len, xfered_len, |
07b82ea5 PA |
1023 | table->sections, |
1024 | table->sections_end, | |
1025 | NULL); | |
1026 | } | |
98646950 UW |
1027 | } |
1028 | ||
cf7a04e8 DJ |
1029 | /* Try GDB's internal data cache. */ |
1030 | region = lookup_mem_region (memaddr); | |
4b5752d0 VP |
1031 | /* region->hi == 0 means there's no upper bound. */ |
1032 | if (memaddr + len < region->hi || region->hi == 0) | |
cf7a04e8 DJ |
1033 | reg_len = len; |
1034 | else | |
1035 | reg_len = region->hi - memaddr; | |
1036 | ||
1037 | switch (region->attrib.mode) | |
1038 | { | |
1039 | case MEM_RO: | |
1040 | if (writebuf != NULL) | |
2ed4b548 | 1041 | return TARGET_XFER_E_IO; |
cf7a04e8 DJ |
1042 | break; |
1043 | ||
1044 | case MEM_WO: | |
1045 | if (readbuf != NULL) | |
2ed4b548 | 1046 | return TARGET_XFER_E_IO; |
cf7a04e8 | 1047 | break; |
a76d924d DJ |
1048 | |
1049 | case MEM_FLASH: | |
1050 | /* We only support writing to flash during "load" for now. */ | |
1051 | if (writebuf != NULL) | |
1052 | error (_("Writing to flash memory forbidden in this context")); | |
1053 | break; | |
4b5752d0 VP |
1054 | |
1055 | case MEM_NONE: | |
2ed4b548 | 1056 | return TARGET_XFER_E_IO; |
cf7a04e8 DJ |
1057 | } |
1058 | ||
6c95b8df PA |
1059 | if (!ptid_equal (inferior_ptid, null_ptid)) |
1060 | inf = find_inferior_pid (ptid_get_pid (inferior_ptid)); | |
1061 | else | |
1062 | inf = NULL; | |
4e5d721f DE |
1063 | |
1064 | if (inf != NULL | |
0f26cec1 | 1065 | && readbuf != NULL |
2f4d8875 PA |
1066 | /* The dcache reads whole cache lines; that doesn't play well |
1067 | with reading from a trace buffer, because reading outside of | |
1068 | the collected memory range fails. */ | |
1069 | && get_traceframe_number () == -1 | |
4e5d721f | 1070 | && (region->attrib.cache |
29453a14 YQ |
1071 | || (stack_cache_enabled_p () && object == TARGET_OBJECT_STACK_MEMORY) |
1072 | || (code_cache_enabled_p () && object == TARGET_OBJECT_CODE_MEMORY))) | |
cf7a04e8 | 1073 | { |
2a2f9fe4 YQ |
1074 | DCACHE *dcache = target_dcache_get_or_init (); |
1075 | ||
0f26cec1 PA |
1076 | return dcache_read_memory_partial (ops, dcache, memaddr, readbuf, |
1077 | reg_len, xfered_len); | |
cf7a04e8 DJ |
1078 | } |
1079 | ||
1080 | /* If none of those methods found the memory we wanted, fall back | |
1081 | to a target partial transfer. Normally a single call to | |
1082 | to_xfer_partial is enough; if it doesn't recognize an object | |
1083 | it will call the to_xfer_partial of the next target down. | |
1084 | But for memory this won't do. Memory is the only target | |
9b409511 YQ |
1085 | object which can be read from more than one valid target. |
1086 | A core file, for instance, could have some of memory but | |
1087 | delegate other bits to the target below it. So, we must | |
1088 | manually try all targets. */ | |
1089 | ||
1090 | res = raw_memory_xfer_partial (ops, readbuf, writebuf, memaddr, reg_len, | |
1091 | xfered_len); | |
cf7a04e8 DJ |
1092 | |
1093 | /* If we still haven't got anything, return the last error. We | |
1094 | give up. */ | |
1095 | return res; | |
0779438d AC |
1096 | } |
1097 | ||
f0ba3972 PA |
1098 | /* Perform a partial memory transfer. For docs see target.h, |
1099 | to_xfer_partial. */ | |
1100 | ||
9b409511 | 1101 | static enum target_xfer_status |
f0ba3972 | 1102 | memory_xfer_partial (struct target_ops *ops, enum target_object object, |
9b409511 YQ |
1103 | gdb_byte *readbuf, const gdb_byte *writebuf, |
1104 | ULONGEST memaddr, ULONGEST len, ULONGEST *xfered_len) | |
f0ba3972 | 1105 | { |
9b409511 | 1106 | enum target_xfer_status res; |
f0ba3972 PA |
1107 | |
1108 | /* Zero length requests are ok and require no work. */ | |
1109 | if (len == 0) | |
9b409511 | 1110 | return TARGET_XFER_EOF; |
f0ba3972 PA |
1111 | |
1112 | /* Fill in READBUF with breakpoint shadows, or WRITEBUF with | |
1113 | breakpoint insns, thus hiding out from higher layers whether | |
1114 | there are software breakpoints inserted in the code stream. */ | |
1115 | if (readbuf != NULL) | |
1116 | { | |
9b409511 YQ |
1117 | res = memory_xfer_partial_1 (ops, object, readbuf, NULL, memaddr, len, |
1118 | xfered_len); | |
f0ba3972 | 1119 | |
9b409511 | 1120 | if (res == TARGET_XFER_OK && !show_memory_breakpoints) |
c63528fc | 1121 | breakpoint_xfer_memory (readbuf, NULL, NULL, memaddr, *xfered_len); |
f0ba3972 PA |
1122 | } |
1123 | else | |
1124 | { | |
1125 | void *buf; | |
1126 | struct cleanup *old_chain; | |
1127 | ||
67c059c2 AB |
1128 | /* A large write request is likely to be partially satisfied |
1129 | by memory_xfer_partial_1. We will continually malloc | |
1130 | and free a copy of the entire write request for breakpoint | |
1131 | shadow handling even though we only end up writing a small | |
1132 | subset of it. Cap writes to 4KB to mitigate this. */ | |
1133 | len = min (4096, len); | |
1134 | ||
f0ba3972 PA |
1135 | buf = xmalloc (len); |
1136 | old_chain = make_cleanup (xfree, buf); | |
1137 | memcpy (buf, writebuf, len); | |
1138 | ||
1139 | breakpoint_xfer_memory (NULL, buf, writebuf, memaddr, len); | |
9b409511 YQ |
1140 | res = memory_xfer_partial_1 (ops, object, NULL, buf, memaddr, len, |
1141 | xfered_len); | |
f0ba3972 PA |
1142 | |
1143 | do_cleanups (old_chain); | |
1144 | } | |
1145 | ||
1146 | return res; | |
1147 | } | |
1148 | ||
8defab1a DJ |
1149 | static void |
1150 | restore_show_memory_breakpoints (void *arg) | |
1151 | { | |
1152 | show_memory_breakpoints = (uintptr_t) arg; | |
1153 | } | |
1154 | ||
1155 | struct cleanup * | |
1156 | make_show_memory_breakpoints_cleanup (int show) | |
1157 | { | |
1158 | int current = show_memory_breakpoints; | |
8defab1a | 1159 | |
5d502164 | 1160 | show_memory_breakpoints = show; |
8defab1a DJ |
1161 | return make_cleanup (restore_show_memory_breakpoints, |
1162 | (void *) (uintptr_t) current); | |
1163 | } | |
1164 | ||
7f79c47e DE |
1165 | /* For docs see target.h, to_xfer_partial. */ |
1166 | ||
9b409511 | 1167 | enum target_xfer_status |
27394598 AC |
1168 | target_xfer_partial (struct target_ops *ops, |
1169 | enum target_object object, const char *annex, | |
4ac248ca | 1170 | gdb_byte *readbuf, const gdb_byte *writebuf, |
9b409511 YQ |
1171 | ULONGEST offset, ULONGEST len, |
1172 | ULONGEST *xfered_len) | |
27394598 | 1173 | { |
9b409511 | 1174 | enum target_xfer_status retval; |
27394598 AC |
1175 | |
1176 | gdb_assert (ops->to_xfer_partial != NULL); | |
cf7a04e8 | 1177 | |
ce6d0892 YQ |
1178 | /* Transfer is done when LEN is zero. */ |
1179 | if (len == 0) | |
9b409511 | 1180 | return TARGET_XFER_EOF; |
ce6d0892 | 1181 | |
d914c394 SS |
1182 | if (writebuf && !may_write_memory) |
1183 | error (_("Writing to memory is not allowed (addr %s, len %s)"), | |
1184 | core_addr_to_string_nz (offset), plongest (len)); | |
1185 | ||
9b409511 YQ |
1186 | *xfered_len = 0; |
1187 | ||
cf7a04e8 DJ |
1188 | /* If this is a memory transfer, let the memory-specific code |
1189 | have a look at it instead. Memory transfers are more | |
1190 | complicated. */ | |
29453a14 YQ |
1191 | if (object == TARGET_OBJECT_MEMORY || object == TARGET_OBJECT_STACK_MEMORY |
1192 | || object == TARGET_OBJECT_CODE_MEMORY) | |
4e5d721f | 1193 | retval = memory_xfer_partial (ops, object, readbuf, |
9b409511 | 1194 | writebuf, offset, len, xfered_len); |
9f713294 | 1195 | else if (object == TARGET_OBJECT_RAW_MEMORY) |
cf7a04e8 | 1196 | { |
9f713294 | 1197 | /* Request the normal memory object from other layers. */ |
9b409511 YQ |
1198 | retval = raw_memory_xfer_partial (ops, readbuf, writebuf, offset, len, |
1199 | xfered_len); | |
cf7a04e8 | 1200 | } |
9f713294 YQ |
1201 | else |
1202 | retval = ops->to_xfer_partial (ops, object, annex, readbuf, | |
9b409511 | 1203 | writebuf, offset, len, xfered_len); |
cf7a04e8 | 1204 | |
27394598 AC |
1205 | if (targetdebug) |
1206 | { | |
1207 | const unsigned char *myaddr = NULL; | |
1208 | ||
1209 | fprintf_unfiltered (gdb_stdlog, | |
3e43a32a | 1210 | "%s:target_xfer_partial " |
9b409511 | 1211 | "(%d, %s, %s, %s, %s, %s) = %d, %s", |
27394598 AC |
1212 | ops->to_shortname, |
1213 | (int) object, | |
1214 | (annex ? annex : "(null)"), | |
53b71562 JB |
1215 | host_address_to_string (readbuf), |
1216 | host_address_to_string (writebuf), | |
0b1553bc | 1217 | core_addr_to_string_nz (offset), |
9b409511 YQ |
1218 | pulongest (len), retval, |
1219 | pulongest (*xfered_len)); | |
27394598 AC |
1220 | |
1221 | if (readbuf) | |
1222 | myaddr = readbuf; | |
1223 | if (writebuf) | |
1224 | myaddr = writebuf; | |
9b409511 | 1225 | if (retval == TARGET_XFER_OK && myaddr != NULL) |
27394598 AC |
1226 | { |
1227 | int i; | |
2bc416ba | 1228 | |
27394598 | 1229 | fputs_unfiltered (", bytes =", gdb_stdlog); |
9b409511 | 1230 | for (i = 0; i < *xfered_len; i++) |
27394598 | 1231 | { |
53b71562 | 1232 | if ((((intptr_t) &(myaddr[i])) & 0xf) == 0) |
27394598 AC |
1233 | { |
1234 | if (targetdebug < 2 && i > 0) | |
1235 | { | |
1236 | fprintf_unfiltered (gdb_stdlog, " ..."); | |
1237 | break; | |
1238 | } | |
1239 | fprintf_unfiltered (gdb_stdlog, "\n"); | |
1240 | } | |
2bc416ba | 1241 | |
27394598 AC |
1242 | fprintf_unfiltered (gdb_stdlog, " %02x", myaddr[i] & 0xff); |
1243 | } | |
1244 | } | |
2bc416ba | 1245 | |
27394598 AC |
1246 | fputc_unfiltered ('\n', gdb_stdlog); |
1247 | } | |
9b409511 YQ |
1248 | |
1249 | /* Check implementations of to_xfer_partial update *XFERED_LEN | |
1250 | properly. Do assertion after printing debug messages, so that we | |
1251 | can find more clues on assertion failure from debugging messages. */ | |
bc113b4e | 1252 | if (retval == TARGET_XFER_OK || retval == TARGET_XFER_UNAVAILABLE) |
9b409511 YQ |
1253 | gdb_assert (*xfered_len > 0); |
1254 | ||
27394598 AC |
1255 | return retval; |
1256 | } | |
1257 | ||
578d3588 PA |
1258 | /* Read LEN bytes of target memory at address MEMADDR, placing the |
1259 | results in GDB's memory at MYADDR. Returns either 0 for success or | |
9b409511 | 1260 | TARGET_XFER_E_IO if any error occurs. |
c906108c SS |
1261 | |
1262 | If an error occurs, no guarantee is made about the contents of the data at | |
1263 | MYADDR. In particular, the caller should not depend upon partial reads | |
1264 | filling the buffer with good data. There is no way for the caller to know | |
1265 | how much good data might have been transfered anyway. Callers that can | |
cf7a04e8 | 1266 | deal with partial reads should call target_read (which will retry until |
c378eb4e | 1267 | it makes no progress, and then return how much was transferred). */ |
c906108c SS |
1268 | |
1269 | int | |
1b162304 | 1270 | target_read_memory (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len) |
c906108c | 1271 | { |
c35b1492 PA |
1272 | /* Dispatch to the topmost target, not the flattened current_target. |
1273 | Memory accesses check target->to_has_(all_)memory, and the | |
1274 | flattened target doesn't inherit those. */ | |
1275 | if (target_read (current_target.beneath, TARGET_OBJECT_MEMORY, NULL, | |
cf7a04e8 DJ |
1276 | myaddr, memaddr, len) == len) |
1277 | return 0; | |
0779438d | 1278 | else |
578d3588 | 1279 | return TARGET_XFER_E_IO; |
c906108c SS |
1280 | } |
1281 | ||
aee4bf85 PA |
1282 | /* Like target_read_memory, but specify explicitly that this is a read |
1283 | from the target's raw memory. That is, this read bypasses the | |
1284 | dcache, breakpoint shadowing, etc. */ | |
1285 | ||
1286 | int | |
1287 | target_read_raw_memory (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len) | |
1288 | { | |
1289 | /* See comment in target_read_memory about why the request starts at | |
1290 | current_target.beneath. */ | |
1291 | if (target_read (current_target.beneath, TARGET_OBJECT_RAW_MEMORY, NULL, | |
1292 | myaddr, memaddr, len) == len) | |
1293 | return 0; | |
1294 | else | |
1295 | return TARGET_XFER_E_IO; | |
1296 | } | |
1297 | ||
4e5d721f DE |
1298 | /* Like target_read_memory, but specify explicitly that this is a read from |
1299 | the target's stack. This may trigger different cache behavior. */ | |
1300 | ||
1301 | int | |
45aa4659 | 1302 | target_read_stack (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len) |
4e5d721f | 1303 | { |
aee4bf85 PA |
1304 | /* See comment in target_read_memory about why the request starts at |
1305 | current_target.beneath. */ | |
4e5d721f DE |
1306 | if (target_read (current_target.beneath, TARGET_OBJECT_STACK_MEMORY, NULL, |
1307 | myaddr, memaddr, len) == len) | |
1308 | return 0; | |
1309 | else | |
578d3588 | 1310 | return TARGET_XFER_E_IO; |
4e5d721f DE |
1311 | } |
1312 | ||
29453a14 YQ |
1313 | /* Like target_read_memory, but specify explicitly that this is a read from |
1314 | the target's code. This may trigger different cache behavior. */ | |
1315 | ||
1316 | int | |
1317 | target_read_code (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len) | |
1318 | { | |
aee4bf85 PA |
1319 | /* See comment in target_read_memory about why the request starts at |
1320 | current_target.beneath. */ | |
29453a14 YQ |
1321 | if (target_read (current_target.beneath, TARGET_OBJECT_CODE_MEMORY, NULL, |
1322 | myaddr, memaddr, len) == len) | |
1323 | return 0; | |
1324 | else | |
1325 | return TARGET_XFER_E_IO; | |
1326 | } | |
1327 | ||
7f79c47e | 1328 | /* Write LEN bytes from MYADDR to target memory at address MEMADDR. |
9b409511 | 1329 | Returns either 0 for success or TARGET_XFER_E_IO if any |
578d3588 PA |
1330 | error occurs. If an error occurs, no guarantee is made about how |
1331 | much data got written. Callers that can deal with partial writes | |
1332 | should call target_write. */ | |
7f79c47e | 1333 | |
c906108c | 1334 | int |
45aa4659 | 1335 | target_write_memory (CORE_ADDR memaddr, const gdb_byte *myaddr, ssize_t len) |
c906108c | 1336 | { |
aee4bf85 PA |
1337 | /* See comment in target_read_memory about why the request starts at |
1338 | current_target.beneath. */ | |
c35b1492 | 1339 | if (target_write (current_target.beneath, TARGET_OBJECT_MEMORY, NULL, |
cf7a04e8 DJ |
1340 | myaddr, memaddr, len) == len) |
1341 | return 0; | |
0779438d | 1342 | else |
578d3588 | 1343 | return TARGET_XFER_E_IO; |
c906108c | 1344 | } |
c5aa993b | 1345 | |
f0ba3972 | 1346 | /* Write LEN bytes from MYADDR to target raw memory at address |
9b409511 | 1347 | MEMADDR. Returns either 0 for success or TARGET_XFER_E_IO |
578d3588 PA |
1348 | if any error occurs. If an error occurs, no guarantee is made |
1349 | about how much data got written. Callers that can deal with | |
1350 | partial writes should call target_write. */ | |
f0ba3972 PA |
1351 | |
1352 | int | |
45aa4659 | 1353 | target_write_raw_memory (CORE_ADDR memaddr, const gdb_byte *myaddr, ssize_t len) |
f0ba3972 | 1354 | { |
aee4bf85 PA |
1355 | /* See comment in target_read_memory about why the request starts at |
1356 | current_target.beneath. */ | |
f0ba3972 PA |
1357 | if (target_write (current_target.beneath, TARGET_OBJECT_RAW_MEMORY, NULL, |
1358 | myaddr, memaddr, len) == len) | |
1359 | return 0; | |
1360 | else | |
578d3588 | 1361 | return TARGET_XFER_E_IO; |
f0ba3972 PA |
1362 | } |
1363 | ||
fd79ecee DJ |
1364 | /* Fetch the target's memory map. */ |
1365 | ||
1366 | VEC(mem_region_s) * | |
1367 | target_memory_map (void) | |
1368 | { | |
1369 | VEC(mem_region_s) *result; | |
1370 | struct mem_region *last_one, *this_one; | |
1371 | int ix; | |
1372 | struct target_ops *t; | |
1373 | ||
6b2c5a57 | 1374 | result = current_target.to_memory_map (¤t_target); |
fd79ecee DJ |
1375 | if (result == NULL) |
1376 | return NULL; | |
1377 | ||
1378 | qsort (VEC_address (mem_region_s, result), | |
1379 | VEC_length (mem_region_s, result), | |
1380 | sizeof (struct mem_region), mem_region_cmp); | |
1381 | ||
1382 | /* Check that regions do not overlap. Simultaneously assign | |
1383 | a numbering for the "mem" commands to use to refer to | |
1384 | each region. */ | |
1385 | last_one = NULL; | |
1386 | for (ix = 0; VEC_iterate (mem_region_s, result, ix, this_one); ix++) | |
1387 | { | |
1388 | this_one->number = ix; | |
1389 | ||
1390 | if (last_one && last_one->hi > this_one->lo) | |
1391 | { | |
1392 | warning (_("Overlapping regions in memory map: ignoring")); | |
1393 | VEC_free (mem_region_s, result); | |
1394 | return NULL; | |
1395 | } | |
1396 | last_one = this_one; | |
1397 | } | |
1398 | ||
1399 | return result; | |
1400 | } | |
1401 | ||
a76d924d DJ |
1402 | void |
1403 | target_flash_erase (ULONGEST address, LONGEST length) | |
1404 | { | |
e8a6c6ac | 1405 | current_target.to_flash_erase (¤t_target, address, length); |
a76d924d DJ |
1406 | } |
1407 | ||
1408 | void | |
1409 | target_flash_done (void) | |
1410 | { | |
f6fb2925 | 1411 | current_target.to_flash_done (¤t_target); |
a76d924d DJ |
1412 | } |
1413 | ||
920d2a44 AC |
1414 | static void |
1415 | show_trust_readonly (struct ui_file *file, int from_tty, | |
1416 | struct cmd_list_element *c, const char *value) | |
1417 | { | |
3e43a32a MS |
1418 | fprintf_filtered (file, |
1419 | _("Mode for reading from readonly sections is %s.\n"), | |
920d2a44 AC |
1420 | value); |
1421 | } | |
3a11626d | 1422 | |
7f79c47e | 1423 | /* Target vector read/write partial wrapper functions. */ |
0088c768 | 1424 | |
9b409511 | 1425 | static enum target_xfer_status |
1e3ff5ad AC |
1426 | target_read_partial (struct target_ops *ops, |
1427 | enum target_object object, | |
1b0ba102 | 1428 | const char *annex, gdb_byte *buf, |
9b409511 YQ |
1429 | ULONGEST offset, ULONGEST len, |
1430 | ULONGEST *xfered_len) | |
1e3ff5ad | 1431 | { |
9b409511 YQ |
1432 | return target_xfer_partial (ops, object, annex, buf, NULL, offset, len, |
1433 | xfered_len); | |
1e3ff5ad AC |
1434 | } |
1435 | ||
8a55ffb0 | 1436 | static enum target_xfer_status |
1e3ff5ad AC |
1437 | target_write_partial (struct target_ops *ops, |
1438 | enum target_object object, | |
1b0ba102 | 1439 | const char *annex, const gdb_byte *buf, |
9b409511 | 1440 | ULONGEST offset, LONGEST len, ULONGEST *xfered_len) |
1e3ff5ad | 1441 | { |
9b409511 YQ |
1442 | return target_xfer_partial (ops, object, annex, NULL, buf, offset, len, |
1443 | xfered_len); | |
1e3ff5ad AC |
1444 | } |
1445 | ||
1446 | /* Wrappers to perform the full transfer. */ | |
7f79c47e DE |
1447 | |
1448 | /* For docs on target_read see target.h. */ | |
1449 | ||
1e3ff5ad AC |
1450 | LONGEST |
1451 | target_read (struct target_ops *ops, | |
1452 | enum target_object object, | |
1b0ba102 | 1453 | const char *annex, gdb_byte *buf, |
1e3ff5ad AC |
1454 | ULONGEST offset, LONGEST len) |
1455 | { | |
1456 | LONGEST xfered = 0; | |
5d502164 | 1457 | |
1e3ff5ad AC |
1458 | while (xfered < len) |
1459 | { | |
9b409511 YQ |
1460 | ULONGEST xfered_len; |
1461 | enum target_xfer_status status; | |
1462 | ||
1463 | status = target_read_partial (ops, object, annex, | |
1464 | (gdb_byte *) buf + xfered, | |
1465 | offset + xfered, len - xfered, | |
1466 | &xfered_len); | |
5d502164 | 1467 | |
1e3ff5ad | 1468 | /* Call an observer, notifying them of the xfer progress? */ |
9b409511 | 1469 | if (status == TARGET_XFER_EOF) |
13547ab6 | 1470 | return xfered; |
9b409511 YQ |
1471 | else if (status == TARGET_XFER_OK) |
1472 | { | |
1473 | xfered += xfered_len; | |
1474 | QUIT; | |
1475 | } | |
1476 | else | |
0088c768 | 1477 | return -1; |
9b409511 | 1478 | |
1e3ff5ad AC |
1479 | } |
1480 | return len; | |
1481 | } | |
1482 | ||
f1a507a1 JB |
1483 | /* Assuming that the entire [begin, end) range of memory cannot be |
1484 | read, try to read whatever subrange is possible to read. | |
1485 | ||
1486 | The function returns, in RESULT, either zero or one memory block. | |
1487 | If there's a readable subrange at the beginning, it is completely | |
1488 | read and returned. Any further readable subrange will not be read. | |
1489 | Otherwise, if there's a readable subrange at the end, it will be | |
1490 | completely read and returned. Any readable subranges before it | |
1491 | (obviously, not starting at the beginning), will be ignored. In | |
1492 | other cases -- either no readable subrange, or readable subrange(s) | |
1493 | that is neither at the beginning, or end, nothing is returned. | |
1494 | ||
1495 | The purpose of this function is to handle a read across a boundary | |
1496 | of accessible memory in a case when memory map is not available. | |
1497 | The above restrictions are fine for this case, but will give | |
1498 | incorrect results if the memory is 'patchy'. However, supporting | |
1499 | 'patchy' memory would require trying to read every single byte, | |
1500 | and it seems unacceptable solution. Explicit memory map is | |
1501 | recommended for this case -- and target_read_memory_robust will | |
1502 | take care of reading multiple ranges then. */ | |
8dedea02 VP |
1503 | |
1504 | static void | |
3e43a32a MS |
1505 | read_whatever_is_readable (struct target_ops *ops, |
1506 | ULONGEST begin, ULONGEST end, | |
8dedea02 | 1507 | VEC(memory_read_result_s) **result) |
d5086790 | 1508 | { |
f1a507a1 | 1509 | gdb_byte *buf = xmalloc (end - begin); |
8dedea02 VP |
1510 | ULONGEST current_begin = begin; |
1511 | ULONGEST current_end = end; | |
1512 | int forward; | |
1513 | memory_read_result_s r; | |
9b409511 | 1514 | ULONGEST xfered_len; |
8dedea02 VP |
1515 | |
1516 | /* If we previously failed to read 1 byte, nothing can be done here. */ | |
1517 | if (end - begin <= 1) | |
13b3fd9b MS |
1518 | { |
1519 | xfree (buf); | |
1520 | return; | |
1521 | } | |
8dedea02 VP |
1522 | |
1523 | /* Check that either first or the last byte is readable, and give up | |
c378eb4e | 1524 | if not. This heuristic is meant to permit reading accessible memory |
8dedea02 VP |
1525 | at the boundary of accessible region. */ |
1526 | if (target_read_partial (ops, TARGET_OBJECT_MEMORY, NULL, | |
9b409511 | 1527 | buf, begin, 1, &xfered_len) == TARGET_XFER_OK) |
8dedea02 VP |
1528 | { |
1529 | forward = 1; | |
1530 | ++current_begin; | |
1531 | } | |
1532 | else if (target_read_partial (ops, TARGET_OBJECT_MEMORY, NULL, | |
9b409511 YQ |
1533 | buf + (end-begin) - 1, end - 1, 1, |
1534 | &xfered_len) == TARGET_XFER_OK) | |
8dedea02 VP |
1535 | { |
1536 | forward = 0; | |
1537 | --current_end; | |
1538 | } | |
1539 | else | |
1540 | { | |
13b3fd9b | 1541 | xfree (buf); |
8dedea02 VP |
1542 | return; |
1543 | } | |
1544 | ||
1545 | /* Loop invariant is that the [current_begin, current_end) was previously | |
1546 | found to be not readable as a whole. | |
1547 | ||
1548 | Note loop condition -- if the range has 1 byte, we can't divide the range | |
1549 | so there's no point trying further. */ | |
1550 | while (current_end - current_begin > 1) | |
1551 | { | |
1552 | ULONGEST first_half_begin, first_half_end; | |
1553 | ULONGEST second_half_begin, second_half_end; | |
1554 | LONGEST xfer; | |
8dedea02 | 1555 | ULONGEST middle = current_begin + (current_end - current_begin)/2; |
f1a507a1 | 1556 | |
8dedea02 VP |
1557 | if (forward) |
1558 | { | |
1559 | first_half_begin = current_begin; | |
1560 | first_half_end = middle; | |
1561 | second_half_begin = middle; | |
1562 | second_half_end = current_end; | |
1563 | } | |
1564 | else | |
1565 | { | |
1566 | first_half_begin = middle; | |
1567 | first_half_end = current_end; | |
1568 | second_half_begin = current_begin; | |
1569 | second_half_end = middle; | |
1570 | } | |
1571 | ||
1572 | xfer = target_read (ops, TARGET_OBJECT_MEMORY, NULL, | |
1573 | buf + (first_half_begin - begin), | |
1574 | first_half_begin, | |
1575 | first_half_end - first_half_begin); | |
1576 | ||
1577 | if (xfer == first_half_end - first_half_begin) | |
1578 | { | |
c378eb4e | 1579 | /* This half reads up fine. So, the error must be in the |
3e43a32a | 1580 | other half. */ |
8dedea02 VP |
1581 | current_begin = second_half_begin; |
1582 | current_end = second_half_end; | |
1583 | } | |
1584 | else | |
1585 | { | |
c378eb4e MS |
1586 | /* This half is not readable. Because we've tried one byte, we |
1587 | know some part of this half if actually redable. Go to the next | |
8dedea02 VP |
1588 | iteration to divide again and try to read. |
1589 | ||
1590 | We don't handle the other half, because this function only tries | |
1591 | to read a single readable subrange. */ | |
1592 | current_begin = first_half_begin; | |
1593 | current_end = first_half_end; | |
1594 | } | |
1595 | } | |
1596 | ||
1597 | if (forward) | |
1598 | { | |
1599 | /* The [begin, current_begin) range has been read. */ | |
1600 | r.begin = begin; | |
1601 | r.end = current_begin; | |
1602 | r.data = buf; | |
1603 | } | |
1604 | else | |
1605 | { | |
1606 | /* The [current_end, end) range has been read. */ | |
1607 | LONGEST rlen = end - current_end; | |
f1a507a1 | 1608 | |
8dedea02 VP |
1609 | r.data = xmalloc (rlen); |
1610 | memcpy (r.data, buf + current_end - begin, rlen); | |
1611 | r.begin = current_end; | |
1612 | r.end = end; | |
1613 | xfree (buf); | |
1614 | } | |
1615 | VEC_safe_push(memory_read_result_s, (*result), &r); | |
1616 | } | |
1617 | ||
1618 | void | |
1619 | free_memory_read_result_vector (void *x) | |
1620 | { | |
1621 | VEC(memory_read_result_s) *v = x; | |
1622 | memory_read_result_s *current; | |
1623 | int ix; | |
1624 | ||
1625 | for (ix = 0; VEC_iterate (memory_read_result_s, v, ix, current); ++ix) | |
1626 | { | |
1627 | xfree (current->data); | |
1628 | } | |
1629 | VEC_free (memory_read_result_s, v); | |
1630 | } | |
1631 | ||
1632 | VEC(memory_read_result_s) * | |
1633 | read_memory_robust (struct target_ops *ops, ULONGEST offset, LONGEST len) | |
1634 | { | |
1635 | VEC(memory_read_result_s) *result = 0; | |
1636 | ||
1637 | LONGEST xfered = 0; | |
d5086790 VP |
1638 | while (xfered < len) |
1639 | { | |
8dedea02 VP |
1640 | struct mem_region *region = lookup_mem_region (offset + xfered); |
1641 | LONGEST rlen; | |
5d502164 | 1642 | |
8dedea02 VP |
1643 | /* If there is no explicit region, a fake one should be created. */ |
1644 | gdb_assert (region); | |
1645 | ||
1646 | if (region->hi == 0) | |
1647 | rlen = len - xfered; | |
1648 | else | |
1649 | rlen = region->hi - offset; | |
1650 | ||
1651 | if (region->attrib.mode == MEM_NONE || region->attrib.mode == MEM_WO) | |
d5086790 | 1652 | { |
c378eb4e | 1653 | /* Cannot read this region. Note that we can end up here only |
8dedea02 VP |
1654 | if the region is explicitly marked inaccessible, or |
1655 | 'inaccessible-by-default' is in effect. */ | |
1656 | xfered += rlen; | |
1657 | } | |
1658 | else | |
1659 | { | |
1660 | LONGEST to_read = min (len - xfered, rlen); | |
1661 | gdb_byte *buffer = (gdb_byte *)xmalloc (to_read); | |
1662 | ||
1663 | LONGEST xfer = target_read (ops, TARGET_OBJECT_MEMORY, NULL, | |
1664 | (gdb_byte *) buffer, | |
1665 | offset + xfered, to_read); | |
1666 | /* Call an observer, notifying them of the xfer progress? */ | |
d5086790 | 1667 | if (xfer <= 0) |
d5086790 | 1668 | { |
c378eb4e | 1669 | /* Got an error reading full chunk. See if maybe we can read |
8dedea02 VP |
1670 | some subrange. */ |
1671 | xfree (buffer); | |
3e43a32a MS |
1672 | read_whatever_is_readable (ops, offset + xfered, |
1673 | offset + xfered + to_read, &result); | |
8dedea02 | 1674 | xfered += to_read; |
d5086790 | 1675 | } |
8dedea02 VP |
1676 | else |
1677 | { | |
1678 | struct memory_read_result r; | |
1679 | r.data = buffer; | |
1680 | r.begin = offset + xfered; | |
1681 | r.end = r.begin + xfer; | |
1682 | VEC_safe_push (memory_read_result_s, result, &r); | |
1683 | xfered += xfer; | |
1684 | } | |
1685 | QUIT; | |
d5086790 | 1686 | } |
d5086790 | 1687 | } |
8dedea02 | 1688 | return result; |
d5086790 VP |
1689 | } |
1690 | ||
8dedea02 | 1691 | |
cf7a04e8 DJ |
1692 | /* An alternative to target_write with progress callbacks. */ |
1693 | ||
1e3ff5ad | 1694 | LONGEST |
cf7a04e8 DJ |
1695 | target_write_with_progress (struct target_ops *ops, |
1696 | enum target_object object, | |
1697 | const char *annex, const gdb_byte *buf, | |
1698 | ULONGEST offset, LONGEST len, | |
1699 | void (*progress) (ULONGEST, void *), void *baton) | |
1e3ff5ad AC |
1700 | { |
1701 | LONGEST xfered = 0; | |
a76d924d DJ |
1702 | |
1703 | /* Give the progress callback a chance to set up. */ | |
1704 | if (progress) | |
1705 | (*progress) (0, baton); | |
1706 | ||
1e3ff5ad AC |
1707 | while (xfered < len) |
1708 | { | |
9b409511 YQ |
1709 | ULONGEST xfered_len; |
1710 | enum target_xfer_status status; | |
1711 | ||
1712 | status = target_write_partial (ops, object, annex, | |
1713 | (gdb_byte *) buf + xfered, | |
1714 | offset + xfered, len - xfered, | |
1715 | &xfered_len); | |
cf7a04e8 | 1716 | |
5c328c05 YQ |
1717 | if (status != TARGET_XFER_OK) |
1718 | return status == TARGET_XFER_EOF ? xfered : -1; | |
cf7a04e8 DJ |
1719 | |
1720 | if (progress) | |
9b409511 | 1721 | (*progress) (xfered_len, baton); |
cf7a04e8 | 1722 | |
9b409511 | 1723 | xfered += xfered_len; |
1e3ff5ad AC |
1724 | QUIT; |
1725 | } | |
1726 | return len; | |
1727 | } | |
1728 | ||
7f79c47e DE |
1729 | /* For docs on target_write see target.h. */ |
1730 | ||
cf7a04e8 DJ |
1731 | LONGEST |
1732 | target_write (struct target_ops *ops, | |
1733 | enum target_object object, | |
1734 | const char *annex, const gdb_byte *buf, | |
1735 | ULONGEST offset, LONGEST len) | |
1736 | { | |
1737 | return target_write_with_progress (ops, object, annex, buf, offset, len, | |
1738 | NULL, NULL); | |
1739 | } | |
1740 | ||
159f81f3 DJ |
1741 | /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return |
1742 | the size of the transferred data. PADDING additional bytes are | |
1743 | available in *BUF_P. This is a helper function for | |
1744 | target_read_alloc; see the declaration of that function for more | |
1745 | information. */ | |
13547ab6 | 1746 | |
159f81f3 DJ |
1747 | static LONGEST |
1748 | target_read_alloc_1 (struct target_ops *ops, enum target_object object, | |
1749 | const char *annex, gdb_byte **buf_p, int padding) | |
13547ab6 DJ |
1750 | { |
1751 | size_t buf_alloc, buf_pos; | |
1752 | gdb_byte *buf; | |
13547ab6 DJ |
1753 | |
1754 | /* This function does not have a length parameter; it reads the | |
1755 | entire OBJECT). Also, it doesn't support objects fetched partly | |
1756 | from one target and partly from another (in a different stratum, | |
1757 | e.g. a core file and an executable). Both reasons make it | |
1758 | unsuitable for reading memory. */ | |
1759 | gdb_assert (object != TARGET_OBJECT_MEMORY); | |
1760 | ||
1761 | /* Start by reading up to 4K at a time. The target will throttle | |
1762 | this number down if necessary. */ | |
1763 | buf_alloc = 4096; | |
1764 | buf = xmalloc (buf_alloc); | |
1765 | buf_pos = 0; | |
1766 | while (1) | |
1767 | { | |
9b409511 YQ |
1768 | ULONGEST xfered_len; |
1769 | enum target_xfer_status status; | |
1770 | ||
1771 | status = target_read_partial (ops, object, annex, &buf[buf_pos], | |
1772 | buf_pos, buf_alloc - buf_pos - padding, | |
1773 | &xfered_len); | |
1774 | ||
1775 | if (status == TARGET_XFER_EOF) | |
13547ab6 DJ |
1776 | { |
1777 | /* Read all there was. */ | |
1778 | if (buf_pos == 0) | |
1779 | xfree (buf); | |
1780 | else | |
1781 | *buf_p = buf; | |
1782 | return buf_pos; | |
1783 | } | |
9b409511 YQ |
1784 | else if (status != TARGET_XFER_OK) |
1785 | { | |
1786 | /* An error occurred. */ | |
1787 | xfree (buf); | |
1788 | return TARGET_XFER_E_IO; | |
1789 | } | |
13547ab6 | 1790 | |
9b409511 | 1791 | buf_pos += xfered_len; |
13547ab6 DJ |
1792 | |
1793 | /* If the buffer is filling up, expand it. */ | |
1794 | if (buf_alloc < buf_pos * 2) | |
1795 | { | |
1796 | buf_alloc *= 2; | |
1797 | buf = xrealloc (buf, buf_alloc); | |
1798 | } | |
1799 | ||
1800 | QUIT; | |
1801 | } | |
1802 | } | |
1803 | ||
159f81f3 DJ |
1804 | /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return |
1805 | the size of the transferred data. See the declaration in "target.h" | |
1806 | function for more information about the return value. */ | |
1807 | ||
1808 | LONGEST | |
1809 | target_read_alloc (struct target_ops *ops, enum target_object object, | |
1810 | const char *annex, gdb_byte **buf_p) | |
1811 | { | |
1812 | return target_read_alloc_1 (ops, object, annex, buf_p, 0); | |
1813 | } | |
1814 | ||
1815 | /* Read OBJECT/ANNEX using OPS. The result is NUL-terminated and | |
1816 | returned as a string, allocated using xmalloc. If an error occurs | |
1817 | or the transfer is unsupported, NULL is returned. Empty objects | |
1818 | are returned as allocated but empty strings. A warning is issued | |
1819 | if the result contains any embedded NUL bytes. */ | |
1820 | ||
1821 | char * | |
1822 | target_read_stralloc (struct target_ops *ops, enum target_object object, | |
1823 | const char *annex) | |
1824 | { | |
39086a0e PA |
1825 | gdb_byte *buffer; |
1826 | char *bufstr; | |
7313baad | 1827 | LONGEST i, transferred; |
159f81f3 | 1828 | |
39086a0e PA |
1829 | transferred = target_read_alloc_1 (ops, object, annex, &buffer, 1); |
1830 | bufstr = (char *) buffer; | |
159f81f3 DJ |
1831 | |
1832 | if (transferred < 0) | |
1833 | return NULL; | |
1834 | ||
1835 | if (transferred == 0) | |
1836 | return xstrdup (""); | |
1837 | ||
39086a0e | 1838 | bufstr[transferred] = 0; |
7313baad UW |
1839 | |
1840 | /* Check for embedded NUL bytes; but allow trailing NULs. */ | |
39086a0e PA |
1841 | for (i = strlen (bufstr); i < transferred; i++) |
1842 | if (bufstr[i] != 0) | |
7313baad UW |
1843 | { |
1844 | warning (_("target object %d, annex %s, " | |
1845 | "contained unexpected null characters"), | |
1846 | (int) object, annex ? annex : "(none)"); | |
1847 | break; | |
1848 | } | |
159f81f3 | 1849 | |
39086a0e | 1850 | return bufstr; |
159f81f3 DJ |
1851 | } |
1852 | ||
b6591e8b AC |
1853 | /* Memory transfer methods. */ |
1854 | ||
1855 | void | |
1b0ba102 | 1856 | get_target_memory (struct target_ops *ops, CORE_ADDR addr, gdb_byte *buf, |
b6591e8b AC |
1857 | LONGEST len) |
1858 | { | |
07b82ea5 PA |
1859 | /* This method is used to read from an alternate, non-current |
1860 | target. This read must bypass the overlay support (as symbols | |
1861 | don't match this target), and GDB's internal cache (wrong cache | |
1862 | for this target). */ | |
1863 | if (target_read (ops, TARGET_OBJECT_RAW_MEMORY, NULL, buf, addr, len) | |
b6591e8b | 1864 | != len) |
578d3588 | 1865 | memory_error (TARGET_XFER_E_IO, addr); |
b6591e8b AC |
1866 | } |
1867 | ||
1868 | ULONGEST | |
5d502164 MS |
1869 | get_target_memory_unsigned (struct target_ops *ops, CORE_ADDR addr, |
1870 | int len, enum bfd_endian byte_order) | |
b6591e8b | 1871 | { |
f6519ebc | 1872 | gdb_byte buf[sizeof (ULONGEST)]; |
b6591e8b AC |
1873 | |
1874 | gdb_assert (len <= sizeof (buf)); | |
1875 | get_target_memory (ops, addr, buf, len); | |
e17a4113 | 1876 | return extract_unsigned_integer (buf, len, byte_order); |
b6591e8b AC |
1877 | } |
1878 | ||
3db08215 MM |
1879 | /* See target.h. */ |
1880 | ||
d914c394 SS |
1881 | int |
1882 | target_insert_breakpoint (struct gdbarch *gdbarch, | |
1883 | struct bp_target_info *bp_tgt) | |
1884 | { | |
1885 | if (!may_insert_breakpoints) | |
1886 | { | |
1887 | warning (_("May not insert breakpoints")); | |
1888 | return 1; | |
1889 | } | |
1890 | ||
6b84065d TT |
1891 | return current_target.to_insert_breakpoint (¤t_target, |
1892 | gdbarch, bp_tgt); | |
d914c394 SS |
1893 | } |
1894 | ||
3db08215 MM |
1895 | /* See target.h. */ |
1896 | ||
d914c394 | 1897 | int |
6b84065d TT |
1898 | target_remove_breakpoint (struct gdbarch *gdbarch, |
1899 | struct bp_target_info *bp_tgt) | |
d914c394 SS |
1900 | { |
1901 | /* This is kind of a weird case to handle, but the permission might | |
1902 | have been changed after breakpoints were inserted - in which case | |
1903 | we should just take the user literally and assume that any | |
1904 | breakpoints should be left in place. */ | |
1905 | if (!may_insert_breakpoints) | |
1906 | { | |
1907 | warning (_("May not remove breakpoints")); | |
1908 | return 1; | |
1909 | } | |
1910 | ||
6b84065d TT |
1911 | return current_target.to_remove_breakpoint (¤t_target, |
1912 | gdbarch, bp_tgt); | |
d914c394 SS |
1913 | } |
1914 | ||
c906108c | 1915 | static void |
fba45db2 | 1916 | target_info (char *args, int from_tty) |
c906108c SS |
1917 | { |
1918 | struct target_ops *t; | |
c906108c | 1919 | int has_all_mem = 0; |
c5aa993b | 1920 | |
c906108c | 1921 | if (symfile_objfile != NULL) |
4262abfb JK |
1922 | printf_unfiltered (_("Symbols from \"%s\".\n"), |
1923 | objfile_name (symfile_objfile)); | |
c906108c | 1924 | |
258b763a | 1925 | for (t = target_stack; t != NULL; t = t->beneath) |
c906108c | 1926 | { |
c35b1492 | 1927 | if (!(*t->to_has_memory) (t)) |
c906108c SS |
1928 | continue; |
1929 | ||
c5aa993b | 1930 | if ((int) (t->to_stratum) <= (int) dummy_stratum) |
c906108c SS |
1931 | continue; |
1932 | if (has_all_mem) | |
3e43a32a MS |
1933 | printf_unfiltered (_("\tWhile running this, " |
1934 | "GDB does not access memory from...\n")); | |
c5aa993b JM |
1935 | printf_unfiltered ("%s:\n", t->to_longname); |
1936 | (t->to_files_info) (t); | |
c35b1492 | 1937 | has_all_mem = (*t->to_has_all_memory) (t); |
c906108c SS |
1938 | } |
1939 | } | |
1940 | ||
fd79ecee DJ |
1941 | /* This function is called before any new inferior is created, e.g. |
1942 | by running a program, attaching, or connecting to a target. | |
1943 | It cleans up any state from previous invocations which might | |
1944 | change between runs. This is a subset of what target_preopen | |
1945 | resets (things which might change between targets). */ | |
1946 | ||
1947 | void | |
1948 | target_pre_inferior (int from_tty) | |
1949 | { | |
c378eb4e | 1950 | /* Clear out solib state. Otherwise the solib state of the previous |
b9db4ced | 1951 | inferior might have survived and is entirely wrong for the new |
c378eb4e | 1952 | target. This has been observed on GNU/Linux using glibc 2.3. How |
b9db4ced UW |
1953 | to reproduce: |
1954 | ||
1955 | bash$ ./foo& | |
1956 | [1] 4711 | |
1957 | bash$ ./foo& | |
1958 | [1] 4712 | |
1959 | bash$ gdb ./foo | |
1960 | [...] | |
1961 | (gdb) attach 4711 | |
1962 | (gdb) detach | |
1963 | (gdb) attach 4712 | |
1964 | Cannot access memory at address 0xdeadbeef | |
1965 | */ | |
b9db4ced | 1966 | |
50c71eaf PA |
1967 | /* In some OSs, the shared library list is the same/global/shared |
1968 | across inferiors. If code is shared between processes, so are | |
1969 | memory regions and features. */ | |
f5656ead | 1970 | if (!gdbarch_has_global_solist (target_gdbarch ())) |
50c71eaf PA |
1971 | { |
1972 | no_shared_libraries (NULL, from_tty); | |
1973 | ||
1974 | invalidate_target_mem_regions (); | |
424163ea | 1975 | |
50c71eaf PA |
1976 | target_clear_description (); |
1977 | } | |
8ffcbaaf YQ |
1978 | |
1979 | agent_capability_invalidate (); | |
fd79ecee DJ |
1980 | } |
1981 | ||
b8fa0bfa PA |
1982 | /* Callback for iterate_over_inferiors. Gets rid of the given |
1983 | inferior. */ | |
1984 | ||
1985 | static int | |
1986 | dispose_inferior (struct inferior *inf, void *args) | |
1987 | { | |
1988 | struct thread_info *thread; | |
1989 | ||
1990 | thread = any_thread_of_process (inf->pid); | |
1991 | if (thread) | |
1992 | { | |
1993 | switch_to_thread (thread->ptid); | |
1994 | ||
1995 | /* Core inferiors actually should be detached, not killed. */ | |
1996 | if (target_has_execution) | |
1997 | target_kill (); | |
1998 | else | |
1999 | target_detach (NULL, 0); | |
2000 | } | |
2001 | ||
2002 | return 0; | |
2003 | } | |
2004 | ||
c906108c SS |
2005 | /* This is to be called by the open routine before it does |
2006 | anything. */ | |
2007 | ||
2008 | void | |
fba45db2 | 2009 | target_preopen (int from_tty) |
c906108c | 2010 | { |
c5aa993b | 2011 | dont_repeat (); |
c906108c | 2012 | |
b8fa0bfa | 2013 | if (have_inferiors ()) |
c5aa993b | 2014 | { |
adf40b2e | 2015 | if (!from_tty |
b8fa0bfa PA |
2016 | || !have_live_inferiors () |
2017 | || query (_("A program is being debugged already. Kill it? "))) | |
2018 | iterate_over_inferiors (dispose_inferior, NULL); | |
c906108c | 2019 | else |
8a3fe4f8 | 2020 | error (_("Program not killed.")); |
c906108c SS |
2021 | } |
2022 | ||
2023 | /* Calling target_kill may remove the target from the stack. But if | |
2024 | it doesn't (which seems like a win for UDI), remove it now. */ | |
87ab71f0 PA |
2025 | /* Leave the exec target, though. The user may be switching from a |
2026 | live process to a core of the same program. */ | |
460014f5 | 2027 | pop_all_targets_above (file_stratum); |
fd79ecee DJ |
2028 | |
2029 | target_pre_inferior (from_tty); | |
c906108c SS |
2030 | } |
2031 | ||
2032 | /* Detach a target after doing deferred register stores. */ | |
2033 | ||
2034 | void | |
52554a0e | 2035 | target_detach (const char *args, int from_tty) |
c906108c | 2036 | { |
136d6dae VP |
2037 | struct target_ops* t; |
2038 | ||
f5656ead | 2039 | if (gdbarch_has_global_breakpoints (target_gdbarch ())) |
50c71eaf PA |
2040 | /* Don't remove global breakpoints here. They're removed on |
2041 | disconnection from the target. */ | |
2042 | ; | |
2043 | else | |
2044 | /* If we're in breakpoints-always-inserted mode, have to remove | |
2045 | them before detaching. */ | |
dfd4cc63 | 2046 | remove_breakpoints_pid (ptid_get_pid (inferior_ptid)); |
74960c60 | 2047 | |
24291992 PA |
2048 | prepare_for_detach (); |
2049 | ||
09da0d0a | 2050 | current_target.to_detach (¤t_target, args, from_tty); |
c906108c SS |
2051 | } |
2052 | ||
6ad8ae5c | 2053 | void |
fee354ee | 2054 | target_disconnect (const char *args, int from_tty) |
6ad8ae5c | 2055 | { |
50c71eaf PA |
2056 | /* If we're in breakpoints-always-inserted mode or if breakpoints |
2057 | are global across processes, we have to remove them before | |
2058 | disconnecting. */ | |
74960c60 VP |
2059 | remove_breakpoints (); |
2060 | ||
86a0854a | 2061 | current_target.to_disconnect (¤t_target, args, from_tty); |
6ad8ae5c DJ |
2062 | } |
2063 | ||
117de6a9 | 2064 | ptid_t |
47608cb1 | 2065 | target_wait (ptid_t ptid, struct target_waitstatus *status, int options) |
117de6a9 | 2066 | { |
a7068b60 | 2067 | return (current_target.to_wait) (¤t_target, ptid, status, options); |
117de6a9 PA |
2068 | } |
2069 | ||
2070 | char * | |
2071 | target_pid_to_str (ptid_t ptid) | |
2072 | { | |
770234d3 | 2073 | return (*current_target.to_pid_to_str) (¤t_target, ptid); |
117de6a9 PA |
2074 | } |
2075 | ||
4694da01 TT |
2076 | char * |
2077 | target_thread_name (struct thread_info *info) | |
2078 | { | |
825828fc | 2079 | return current_target.to_thread_name (¤t_target, info); |
4694da01 TT |
2080 | } |
2081 | ||
e1ac3328 | 2082 | void |
2ea28649 | 2083 | target_resume (ptid_t ptid, int step, enum gdb_signal signal) |
e1ac3328 | 2084 | { |
28439f5e PA |
2085 | struct target_ops *t; |
2086 | ||
4e5d721f | 2087 | target_dcache_invalidate (); |
28439f5e | 2088 | |
6b84065d | 2089 | current_target.to_resume (¤t_target, ptid, step, signal); |
28439f5e | 2090 | |
6b84065d | 2091 | registers_changed_ptid (ptid); |
251bde03 PA |
2092 | /* We only set the internal executing state here. The user/frontend |
2093 | running state is set at a higher level. */ | |
6b84065d | 2094 | set_executing (ptid, 1); |
6b84065d | 2095 | clear_inline_frame_state (ptid); |
e1ac3328 | 2096 | } |
2455069d UW |
2097 | |
2098 | void | |
2099 | target_pass_signals (int numsigs, unsigned char *pass_signals) | |
2100 | { | |
035cad7f | 2101 | (*current_target.to_pass_signals) (¤t_target, numsigs, pass_signals); |
2455069d UW |
2102 | } |
2103 | ||
9b224c5e PA |
2104 | void |
2105 | target_program_signals (int numsigs, unsigned char *program_signals) | |
2106 | { | |
7d4f8efa TT |
2107 | (*current_target.to_program_signals) (¤t_target, |
2108 | numsigs, program_signals); | |
9b224c5e PA |
2109 | } |
2110 | ||
098dba18 TT |
2111 | static int |
2112 | default_follow_fork (struct target_ops *self, int follow_child, | |
2113 | int detach_fork) | |
2114 | { | |
2115 | /* Some target returned a fork event, but did not know how to follow it. */ | |
2116 | internal_error (__FILE__, __LINE__, | |
2117 | _("could not find a target to follow fork")); | |
2118 | } | |
2119 | ||
ee057212 DJ |
2120 | /* Look through the list of possible targets for a target that can |
2121 | follow forks. */ | |
2122 | ||
2123 | int | |
07107ca6 | 2124 | target_follow_fork (int follow_child, int detach_fork) |
ee057212 | 2125 | { |
a7068b60 TT |
2126 | return current_target.to_follow_fork (¤t_target, |
2127 | follow_child, detach_fork); | |
ee057212 DJ |
2128 | } |
2129 | ||
8d657035 TT |
2130 | static void |
2131 | default_mourn_inferior (struct target_ops *self) | |
2132 | { | |
2133 | internal_error (__FILE__, __LINE__, | |
2134 | _("could not find a target to follow mourn inferior")); | |
2135 | } | |
2136 | ||
136d6dae VP |
2137 | void |
2138 | target_mourn_inferior (void) | |
2139 | { | |
8d657035 | 2140 | current_target.to_mourn_inferior (¤t_target); |
136d6dae | 2141 | |
8d657035 TT |
2142 | /* We no longer need to keep handles on any of the object files. |
2143 | Make sure to release them to avoid unnecessarily locking any | |
2144 | of them while we're not actually debugging. */ | |
2145 | bfd_cache_close_all (); | |
136d6dae VP |
2146 | } |
2147 | ||
424163ea DJ |
2148 | /* Look for a target which can describe architectural features, starting |
2149 | from TARGET. If we find one, return its description. */ | |
2150 | ||
2151 | const struct target_desc * | |
2152 | target_read_description (struct target_ops *target) | |
2153 | { | |
2117c711 | 2154 | return target->to_read_description (target); |
424163ea DJ |
2155 | } |
2156 | ||
58a5184e | 2157 | /* This implements a basic search of memory, reading target memory and |
08388c79 DE |
2158 | performing the search here (as opposed to performing the search in on the |
2159 | target side with, for example, gdbserver). */ | |
2160 | ||
2161 | int | |
2162 | simple_search_memory (struct target_ops *ops, | |
2163 | CORE_ADDR start_addr, ULONGEST search_space_len, | |
2164 | const gdb_byte *pattern, ULONGEST pattern_len, | |
2165 | CORE_ADDR *found_addrp) | |
2166 | { | |
2167 | /* NOTE: also defined in find.c testcase. */ | |
2168 | #define SEARCH_CHUNK_SIZE 16000 | |
2169 | const unsigned chunk_size = SEARCH_CHUNK_SIZE; | |
2170 | /* Buffer to hold memory contents for searching. */ | |
2171 | gdb_byte *search_buf; | |
2172 | unsigned search_buf_size; | |
2173 | struct cleanup *old_cleanups; | |
2174 | ||
2175 | search_buf_size = chunk_size + pattern_len - 1; | |
2176 | ||
2177 | /* No point in trying to allocate a buffer larger than the search space. */ | |
2178 | if (search_space_len < search_buf_size) | |
2179 | search_buf_size = search_space_len; | |
2180 | ||
2181 | search_buf = malloc (search_buf_size); | |
2182 | if (search_buf == NULL) | |
5e1471f5 | 2183 | error (_("Unable to allocate memory to perform the search.")); |
08388c79 DE |
2184 | old_cleanups = make_cleanup (free_current_contents, &search_buf); |
2185 | ||
2186 | /* Prime the search buffer. */ | |
2187 | ||
2188 | if (target_read (ops, TARGET_OBJECT_MEMORY, NULL, | |
2189 | search_buf, start_addr, search_buf_size) != search_buf_size) | |
2190 | { | |
b3dc46ff AB |
2191 | warning (_("Unable to access %s bytes of target " |
2192 | "memory at %s, halting search."), | |
2193 | pulongest (search_buf_size), hex_string (start_addr)); | |
08388c79 DE |
2194 | do_cleanups (old_cleanups); |
2195 | return -1; | |
2196 | } | |
2197 | ||
2198 | /* Perform the search. | |
2199 | ||
2200 | The loop is kept simple by allocating [N + pattern-length - 1] bytes. | |
2201 | When we've scanned N bytes we copy the trailing bytes to the start and | |
2202 | read in another N bytes. */ | |
2203 | ||
2204 | while (search_space_len >= pattern_len) | |
2205 | { | |
2206 | gdb_byte *found_ptr; | |
2207 | unsigned nr_search_bytes = min (search_space_len, search_buf_size); | |
2208 | ||
2209 | found_ptr = memmem (search_buf, nr_search_bytes, | |
2210 | pattern, pattern_len); | |
2211 | ||
2212 | if (found_ptr != NULL) | |
2213 | { | |
2214 | CORE_ADDR found_addr = start_addr + (found_ptr - search_buf); | |
5d502164 | 2215 | |
08388c79 DE |
2216 | *found_addrp = found_addr; |
2217 | do_cleanups (old_cleanups); | |
2218 | return 1; | |
2219 | } | |
2220 | ||
2221 | /* Not found in this chunk, skip to next chunk. */ | |
2222 | ||
2223 | /* Don't let search_space_len wrap here, it's unsigned. */ | |
2224 | if (search_space_len >= chunk_size) | |
2225 | search_space_len -= chunk_size; | |
2226 | else | |
2227 | search_space_len = 0; | |
2228 | ||
2229 | if (search_space_len >= pattern_len) | |
2230 | { | |
2231 | unsigned keep_len = search_buf_size - chunk_size; | |
8a35fb51 | 2232 | CORE_ADDR read_addr = start_addr + chunk_size + keep_len; |
08388c79 DE |
2233 | int nr_to_read; |
2234 | ||
2235 | /* Copy the trailing part of the previous iteration to the front | |
2236 | of the buffer for the next iteration. */ | |
2237 | gdb_assert (keep_len == pattern_len - 1); | |
2238 | memcpy (search_buf, search_buf + chunk_size, keep_len); | |
2239 | ||
2240 | nr_to_read = min (search_space_len - keep_len, chunk_size); | |
2241 | ||
2242 | if (target_read (ops, TARGET_OBJECT_MEMORY, NULL, | |
2243 | search_buf + keep_len, read_addr, | |
2244 | nr_to_read) != nr_to_read) | |
2245 | { | |
b3dc46ff | 2246 | warning (_("Unable to access %s bytes of target " |
9b20d036 | 2247 | "memory at %s, halting search."), |
b3dc46ff | 2248 | plongest (nr_to_read), |
08388c79 DE |
2249 | hex_string (read_addr)); |
2250 | do_cleanups (old_cleanups); | |
2251 | return -1; | |
2252 | } | |
2253 | ||
2254 | start_addr += chunk_size; | |
2255 | } | |
2256 | } | |
2257 | ||
2258 | /* Not found. */ | |
2259 | ||
2260 | do_cleanups (old_cleanups); | |
2261 | return 0; | |
2262 | } | |
2263 | ||
58a5184e TT |
2264 | /* Default implementation of memory-searching. */ |
2265 | ||
2266 | static int | |
2267 | default_search_memory (struct target_ops *self, | |
2268 | CORE_ADDR start_addr, ULONGEST search_space_len, | |
2269 | const gdb_byte *pattern, ULONGEST pattern_len, | |
2270 | CORE_ADDR *found_addrp) | |
2271 | { | |
2272 | /* Start over from the top of the target stack. */ | |
2273 | return simple_search_memory (current_target.beneath, | |
2274 | start_addr, search_space_len, | |
2275 | pattern, pattern_len, found_addrp); | |
2276 | } | |
2277 | ||
08388c79 DE |
2278 | /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the |
2279 | sequence of bytes in PATTERN with length PATTERN_LEN. | |
2280 | ||
2281 | The result is 1 if found, 0 if not found, and -1 if there was an error | |
2282 | requiring halting of the search (e.g. memory read error). | |
2283 | If the pattern is found the address is recorded in FOUND_ADDRP. */ | |
2284 | ||
2285 | int | |
2286 | target_search_memory (CORE_ADDR start_addr, ULONGEST search_space_len, | |
2287 | const gdb_byte *pattern, ULONGEST pattern_len, | |
2288 | CORE_ADDR *found_addrp) | |
2289 | { | |
a7068b60 TT |
2290 | return current_target.to_search_memory (¤t_target, start_addr, |
2291 | search_space_len, | |
2292 | pattern, pattern_len, found_addrp); | |
08388c79 DE |
2293 | } |
2294 | ||
8edfe269 DJ |
2295 | /* Look through the currently pushed targets. If none of them will |
2296 | be able to restart the currently running process, issue an error | |
2297 | message. */ | |
2298 | ||
2299 | void | |
2300 | target_require_runnable (void) | |
2301 | { | |
2302 | struct target_ops *t; | |
2303 | ||
2304 | for (t = target_stack; t != NULL; t = t->beneath) | |
2305 | { | |
2306 | /* If this target knows how to create a new program, then | |
2307 | assume we will still be able to after killing the current | |
2308 | one. Either killing and mourning will not pop T, or else | |
2309 | find_default_run_target will find it again. */ | |
2310 | if (t->to_create_inferior != NULL) | |
2311 | return; | |
2312 | ||
548740d6 | 2313 | /* Do not worry about targets at certain strata that can not |
8edfe269 DJ |
2314 | create inferiors. Assume they will be pushed again if |
2315 | necessary, and continue to the process_stratum. */ | |
85e747d2 | 2316 | if (t->to_stratum == thread_stratum |
548740d6 | 2317 | || t->to_stratum == record_stratum |
85e747d2 | 2318 | || t->to_stratum == arch_stratum) |
8edfe269 DJ |
2319 | continue; |
2320 | ||
3e43a32a MS |
2321 | error (_("The \"%s\" target does not support \"run\". " |
2322 | "Try \"help target\" or \"continue\"."), | |
8edfe269 DJ |
2323 | t->to_shortname); |
2324 | } | |
2325 | ||
2326 | /* This function is only called if the target is running. In that | |
2327 | case there should have been a process_stratum target and it | |
c378eb4e | 2328 | should either know how to create inferiors, or not... */ |
9b20d036 | 2329 | internal_error (__FILE__, __LINE__, _("No targets found")); |
8edfe269 DJ |
2330 | } |
2331 | ||
6a3cb8e8 PA |
2332 | /* Whether GDB is allowed to fall back to the default run target for |
2333 | "run", "attach", etc. when no target is connected yet. */ | |
2334 | static int auto_connect_native_target = 1; | |
2335 | ||
2336 | static void | |
2337 | show_auto_connect_native_target (struct ui_file *file, int from_tty, | |
2338 | struct cmd_list_element *c, const char *value) | |
2339 | { | |
2340 | fprintf_filtered (file, | |
2341 | _("Whether GDB may automatically connect to the " | |
2342 | "native target is %s.\n"), | |
2343 | value); | |
2344 | } | |
2345 | ||
c906108c SS |
2346 | /* Look through the list of possible targets for a target that can |
2347 | execute a run or attach command without any other data. This is | |
2348 | used to locate the default process stratum. | |
2349 | ||
5f667f2d PA |
2350 | If DO_MESG is not NULL, the result is always valid (error() is |
2351 | called for errors); else, return NULL on error. */ | |
c906108c SS |
2352 | |
2353 | static struct target_ops * | |
fba45db2 | 2354 | find_default_run_target (char *do_mesg) |
c906108c | 2355 | { |
c906108c | 2356 | struct target_ops *runable = NULL; |
c906108c | 2357 | |
6a3cb8e8 | 2358 | if (auto_connect_native_target) |
c906108c | 2359 | { |
6a3cb8e8 PA |
2360 | struct target_ops **t; |
2361 | int count = 0; | |
2362 | ||
2363 | for (t = target_structs; t < target_structs + target_struct_size; | |
2364 | ++t) | |
c906108c | 2365 | { |
6a3cb8e8 PA |
2366 | if ((*t)->to_can_run != delegate_can_run && target_can_run (*t)) |
2367 | { | |
2368 | runable = *t; | |
2369 | ++count; | |
2370 | } | |
c906108c | 2371 | } |
6a3cb8e8 PA |
2372 | |
2373 | if (count != 1) | |
2374 | runable = NULL; | |
c906108c SS |
2375 | } |
2376 | ||
6a3cb8e8 | 2377 | if (runable == NULL) |
5f667f2d PA |
2378 | { |
2379 | if (do_mesg) | |
2380 | error (_("Don't know how to %s. Try \"help target\"."), do_mesg); | |
2381 | else | |
2382 | return NULL; | |
2383 | } | |
c906108c SS |
2384 | |
2385 | return runable; | |
2386 | } | |
2387 | ||
b3ccfe11 | 2388 | /* See target.h. */ |
c906108c | 2389 | |
b3ccfe11 TT |
2390 | struct target_ops * |
2391 | find_attach_target (void) | |
c906108c SS |
2392 | { |
2393 | struct target_ops *t; | |
2394 | ||
b3ccfe11 TT |
2395 | /* If a target on the current stack can attach, use it. */ |
2396 | for (t = current_target.beneath; t != NULL; t = t->beneath) | |
2397 | { | |
2398 | if (t->to_attach != NULL) | |
2399 | break; | |
2400 | } | |
c906108c | 2401 | |
b3ccfe11 TT |
2402 | /* Otherwise, use the default run target for attaching. */ |
2403 | if (t == NULL) | |
2404 | t = find_default_run_target ("attach"); | |
b84876c2 | 2405 | |
b3ccfe11 | 2406 | return t; |
b84876c2 PA |
2407 | } |
2408 | ||
b3ccfe11 | 2409 | /* See target.h. */ |
b84876c2 | 2410 | |
b3ccfe11 TT |
2411 | struct target_ops * |
2412 | find_run_target (void) | |
9908b566 VP |
2413 | { |
2414 | struct target_ops *t; | |
2415 | ||
b3ccfe11 TT |
2416 | /* If a target on the current stack can attach, use it. */ |
2417 | for (t = current_target.beneath; t != NULL; t = t->beneath) | |
2418 | { | |
2419 | if (t->to_create_inferior != NULL) | |
2420 | break; | |
2421 | } | |
5d502164 | 2422 | |
b3ccfe11 TT |
2423 | /* Otherwise, use the default run target. */ |
2424 | if (t == NULL) | |
2425 | t = find_default_run_target ("run"); | |
9908b566 | 2426 | |
b3ccfe11 | 2427 | return t; |
9908b566 VP |
2428 | } |
2429 | ||
145b16a9 UW |
2430 | /* Implement the "info proc" command. */ |
2431 | ||
451b7c33 | 2432 | int |
7bc112c1 | 2433 | target_info_proc (const char *args, enum info_proc_what what) |
145b16a9 UW |
2434 | { |
2435 | struct target_ops *t; | |
2436 | ||
2437 | /* If we're already connected to something that can get us OS | |
2438 | related data, use it. Otherwise, try using the native | |
2439 | target. */ | |
2440 | if (current_target.to_stratum >= process_stratum) | |
2441 | t = current_target.beneath; | |
2442 | else | |
2443 | t = find_default_run_target (NULL); | |
2444 | ||
2445 | for (; t != NULL; t = t->beneath) | |
2446 | { | |
2447 | if (t->to_info_proc != NULL) | |
2448 | { | |
2449 | t->to_info_proc (t, args, what); | |
2450 | ||
2451 | if (targetdebug) | |
2452 | fprintf_unfiltered (gdb_stdlog, | |
2453 | "target_info_proc (\"%s\", %d)\n", args, what); | |
2454 | ||
451b7c33 | 2455 | return 1; |
145b16a9 UW |
2456 | } |
2457 | } | |
2458 | ||
451b7c33 | 2459 | return 0; |
145b16a9 UW |
2460 | } |
2461 | ||
03583c20 | 2462 | static int |
2bfc0540 | 2463 | find_default_supports_disable_randomization (struct target_ops *self) |
03583c20 UW |
2464 | { |
2465 | struct target_ops *t; | |
2466 | ||
2467 | t = find_default_run_target (NULL); | |
2468 | if (t && t->to_supports_disable_randomization) | |
2bfc0540 | 2469 | return (t->to_supports_disable_randomization) (t); |
03583c20 UW |
2470 | return 0; |
2471 | } | |
2472 | ||
2473 | int | |
2474 | target_supports_disable_randomization (void) | |
2475 | { | |
2476 | struct target_ops *t; | |
2477 | ||
2478 | for (t = ¤t_target; t != NULL; t = t->beneath) | |
2479 | if (t->to_supports_disable_randomization) | |
2bfc0540 | 2480 | return t->to_supports_disable_randomization (t); |
03583c20 UW |
2481 | |
2482 | return 0; | |
2483 | } | |
9908b566 | 2484 | |
07e059b5 VP |
2485 | char * |
2486 | target_get_osdata (const char *type) | |
2487 | { | |
07e059b5 VP |
2488 | struct target_ops *t; |
2489 | ||
739ef7fb PA |
2490 | /* If we're already connected to something that can get us OS |
2491 | related data, use it. Otherwise, try using the native | |
2492 | target. */ | |
2493 | if (current_target.to_stratum >= process_stratum) | |
6d097e65 | 2494 | t = current_target.beneath; |
739ef7fb PA |
2495 | else |
2496 | t = find_default_run_target ("get OS data"); | |
07e059b5 VP |
2497 | |
2498 | if (!t) | |
2499 | return NULL; | |
2500 | ||
6d097e65 | 2501 | return target_read_stralloc (t, TARGET_OBJECT_OSDATA, type); |
07e059b5 VP |
2502 | } |
2503 | ||
8eaff7cd TT |
2504 | static struct address_space * |
2505 | default_thread_address_space (struct target_ops *self, ptid_t ptid) | |
6c95b8df PA |
2506 | { |
2507 | struct inferior *inf; | |
6c95b8df PA |
2508 | |
2509 | /* Fall-back to the "main" address space of the inferior. */ | |
2510 | inf = find_inferior_pid (ptid_get_pid (ptid)); | |
2511 | ||
2512 | if (inf == NULL || inf->aspace == NULL) | |
3e43a32a | 2513 | internal_error (__FILE__, __LINE__, |
9b20d036 MS |
2514 | _("Can't determine the current " |
2515 | "address space of thread %s\n"), | |
6c95b8df PA |
2516 | target_pid_to_str (ptid)); |
2517 | ||
2518 | return inf->aspace; | |
2519 | } | |
2520 | ||
8eaff7cd TT |
2521 | /* Determine the current address space of thread PTID. */ |
2522 | ||
2523 | struct address_space * | |
2524 | target_thread_address_space (ptid_t ptid) | |
2525 | { | |
2526 | struct address_space *aspace; | |
2527 | ||
2528 | aspace = current_target.to_thread_address_space (¤t_target, ptid); | |
2529 | gdb_assert (aspace != NULL); | |
2530 | ||
8eaff7cd TT |
2531 | return aspace; |
2532 | } | |
2533 | ||
7313baad UW |
2534 | |
2535 | /* Target file operations. */ | |
2536 | ||
2537 | static struct target_ops * | |
2538 | default_fileio_target (void) | |
2539 | { | |
2540 | /* If we're already connected to something that can perform | |
2541 | file I/O, use it. Otherwise, try using the native target. */ | |
2542 | if (current_target.to_stratum >= process_stratum) | |
2543 | return current_target.beneath; | |
2544 | else | |
2545 | return find_default_run_target ("file I/O"); | |
2546 | } | |
2547 | ||
2548 | /* Open FILENAME on the target, using FLAGS and MODE. Return a | |
2549 | target file descriptor, or -1 if an error occurs (and set | |
2550 | *TARGET_ERRNO). */ | |
2551 | int | |
2552 | target_fileio_open (const char *filename, int flags, int mode, | |
2553 | int *target_errno) | |
2554 | { | |
2555 | struct target_ops *t; | |
2556 | ||
2557 | for (t = default_fileio_target (); t != NULL; t = t->beneath) | |
2558 | { | |
2559 | if (t->to_fileio_open != NULL) | |
2560 | { | |
cd897586 | 2561 | int fd = t->to_fileio_open (t, filename, flags, mode, target_errno); |
7313baad UW |
2562 | |
2563 | if (targetdebug) | |
2564 | fprintf_unfiltered (gdb_stdlog, | |
2565 | "target_fileio_open (%s,0x%x,0%o) = %d (%d)\n", | |
2566 | filename, flags, mode, | |
2567 | fd, fd != -1 ? 0 : *target_errno); | |
2568 | return fd; | |
2569 | } | |
2570 | } | |
2571 | ||
2572 | *target_errno = FILEIO_ENOSYS; | |
2573 | return -1; | |
2574 | } | |
2575 | ||
2576 | /* Write up to LEN bytes from WRITE_BUF to FD on the target. | |
2577 | Return the number of bytes written, or -1 if an error occurs | |
2578 | (and set *TARGET_ERRNO). */ | |
2579 | int | |
2580 | target_fileio_pwrite (int fd, const gdb_byte *write_buf, int len, | |
2581 | ULONGEST offset, int *target_errno) | |
2582 | { | |
2583 | struct target_ops *t; | |
2584 | ||
2585 | for (t = default_fileio_target (); t != NULL; t = t->beneath) | |
2586 | { | |
2587 | if (t->to_fileio_pwrite != NULL) | |
2588 | { | |
0d866f62 | 2589 | int ret = t->to_fileio_pwrite (t, fd, write_buf, len, offset, |
7313baad UW |
2590 | target_errno); |
2591 | ||
2592 | if (targetdebug) | |
2593 | fprintf_unfiltered (gdb_stdlog, | |
a71b5a38 | 2594 | "target_fileio_pwrite (%d,...,%d,%s) " |
7313baad | 2595 | "= %d (%d)\n", |
a71b5a38 | 2596 | fd, len, pulongest (offset), |
7313baad UW |
2597 | ret, ret != -1 ? 0 : *target_errno); |
2598 | return ret; | |
2599 | } | |
2600 | } | |
2601 | ||
2602 | *target_errno = FILEIO_ENOSYS; | |
2603 | return -1; | |
2604 | } | |
2605 | ||
2606 | /* Read up to LEN bytes FD on the target into READ_BUF. | |
2607 | Return the number of bytes read, or -1 if an error occurs | |
2608 | (and set *TARGET_ERRNO). */ | |
2609 | int | |
2610 | target_fileio_pread (int fd, gdb_byte *read_buf, int len, | |
2611 | ULONGEST offset, int *target_errno) | |
2612 | { | |
2613 | struct target_ops *t; | |
2614 | ||
2615 | for (t = default_fileio_target (); t != NULL; t = t->beneath) | |
2616 | { | |
2617 | if (t->to_fileio_pread != NULL) | |
2618 | { | |
a3be983c | 2619 | int ret = t->to_fileio_pread (t, fd, read_buf, len, offset, |
7313baad UW |
2620 | target_errno); |
2621 | ||
2622 | if (targetdebug) | |
2623 | fprintf_unfiltered (gdb_stdlog, | |
a71b5a38 | 2624 | "target_fileio_pread (%d,...,%d,%s) " |
7313baad | 2625 | "= %d (%d)\n", |
a71b5a38 | 2626 | fd, len, pulongest (offset), |
7313baad UW |
2627 | ret, ret != -1 ? 0 : *target_errno); |
2628 | return ret; | |
2629 | } | |
2630 | } | |
2631 | ||
2632 | *target_errno = FILEIO_ENOSYS; | |
2633 | return -1; | |
2634 | } | |
2635 | ||
2636 | /* Close FD on the target. Return 0, or -1 if an error occurs | |
2637 | (and set *TARGET_ERRNO). */ | |
2638 | int | |
2639 | target_fileio_close (int fd, int *target_errno) | |
2640 | { | |
2641 | struct target_ops *t; | |
2642 | ||
2643 | for (t = default_fileio_target (); t != NULL; t = t->beneath) | |
2644 | { | |
2645 | if (t->to_fileio_close != NULL) | |
2646 | { | |
df39ea25 | 2647 | int ret = t->to_fileio_close (t, fd, target_errno); |
7313baad UW |
2648 | |
2649 | if (targetdebug) | |
2650 | fprintf_unfiltered (gdb_stdlog, | |
2651 | "target_fileio_close (%d) = %d (%d)\n", | |
2652 | fd, ret, ret != -1 ? 0 : *target_errno); | |
2653 | return ret; | |
2654 | } | |
2655 | } | |
2656 | ||
2657 | *target_errno = FILEIO_ENOSYS; | |
2658 | return -1; | |
2659 | } | |
2660 | ||
2661 | /* Unlink FILENAME on the target. Return 0, or -1 if an error | |
2662 | occurs (and set *TARGET_ERRNO). */ | |
2663 | int | |
2664 | target_fileio_unlink (const char *filename, int *target_errno) | |
2665 | { | |
2666 | struct target_ops *t; | |
2667 | ||
2668 | for (t = default_fileio_target (); t != NULL; t = t->beneath) | |
2669 | { | |
2670 | if (t->to_fileio_unlink != NULL) | |
2671 | { | |
dbbca37d | 2672 | int ret = t->to_fileio_unlink (t, filename, target_errno); |
7313baad UW |
2673 | |
2674 | if (targetdebug) | |
2675 | fprintf_unfiltered (gdb_stdlog, | |
2676 | "target_fileio_unlink (%s) = %d (%d)\n", | |
2677 | filename, ret, ret != -1 ? 0 : *target_errno); | |
2678 | return ret; | |
2679 | } | |
2680 | } | |
2681 | ||
2682 | *target_errno = FILEIO_ENOSYS; | |
2683 | return -1; | |
2684 | } | |
2685 | ||
b9e7b9c3 UW |
2686 | /* Read value of symbolic link FILENAME on the target. Return a |
2687 | null-terminated string allocated via xmalloc, or NULL if an error | |
2688 | occurs (and set *TARGET_ERRNO). */ | |
2689 | char * | |
2690 | target_fileio_readlink (const char *filename, int *target_errno) | |
2691 | { | |
2692 | struct target_ops *t; | |
2693 | ||
2694 | for (t = default_fileio_target (); t != NULL; t = t->beneath) | |
2695 | { | |
2696 | if (t->to_fileio_readlink != NULL) | |
2697 | { | |
fab5aa7c | 2698 | char *ret = t->to_fileio_readlink (t, filename, target_errno); |
b9e7b9c3 UW |
2699 | |
2700 | if (targetdebug) | |
2701 | fprintf_unfiltered (gdb_stdlog, | |
2702 | "target_fileio_readlink (%s) = %s (%d)\n", | |
2703 | filename, ret? ret : "(nil)", | |
2704 | ret? 0 : *target_errno); | |
2705 | return ret; | |
2706 | } | |
2707 | } | |
2708 | ||
2709 | *target_errno = FILEIO_ENOSYS; | |
2710 | return NULL; | |
2711 | } | |
2712 | ||
7313baad UW |
2713 | static void |
2714 | target_fileio_close_cleanup (void *opaque) | |
2715 | { | |
2716 | int fd = *(int *) opaque; | |
2717 | int target_errno; | |
2718 | ||
2719 | target_fileio_close (fd, &target_errno); | |
2720 | } | |
2721 | ||
2722 | /* Read target file FILENAME. Store the result in *BUF_P and | |
2723 | return the size of the transferred data. PADDING additional bytes are | |
2724 | available in *BUF_P. This is a helper function for | |
2725 | target_fileio_read_alloc; see the declaration of that function for more | |
2726 | information. */ | |
2727 | ||
2728 | static LONGEST | |
2729 | target_fileio_read_alloc_1 (const char *filename, | |
2730 | gdb_byte **buf_p, int padding) | |
2731 | { | |
2732 | struct cleanup *close_cleanup; | |
2733 | size_t buf_alloc, buf_pos; | |
2734 | gdb_byte *buf; | |
2735 | LONGEST n; | |
2736 | int fd; | |
2737 | int target_errno; | |
2738 | ||
2739 | fd = target_fileio_open (filename, FILEIO_O_RDONLY, 0700, &target_errno); | |
2740 | if (fd == -1) | |
2741 | return -1; | |
2742 | ||
2743 | close_cleanup = make_cleanup (target_fileio_close_cleanup, &fd); | |
2744 | ||
2745 | /* Start by reading up to 4K at a time. The target will throttle | |
2746 | this number down if necessary. */ | |
2747 | buf_alloc = 4096; | |
2748 | buf = xmalloc (buf_alloc); | |
2749 | buf_pos = 0; | |
2750 | while (1) | |
2751 | { | |
2752 | n = target_fileio_pread (fd, &buf[buf_pos], | |
2753 | buf_alloc - buf_pos - padding, buf_pos, | |
2754 | &target_errno); | |
2755 | if (n < 0) | |
2756 | { | |
2757 | /* An error occurred. */ | |
2758 | do_cleanups (close_cleanup); | |
2759 | xfree (buf); | |
2760 | return -1; | |
2761 | } | |
2762 | else if (n == 0) | |
2763 | { | |
2764 | /* Read all there was. */ | |
2765 | do_cleanups (close_cleanup); | |
2766 | if (buf_pos == 0) | |
2767 | xfree (buf); | |
2768 | else | |
2769 | *buf_p = buf; | |
2770 | return buf_pos; | |
2771 | } | |
2772 | ||
2773 | buf_pos += n; | |
2774 | ||
2775 | /* If the buffer is filling up, expand it. */ | |
2776 | if (buf_alloc < buf_pos * 2) | |
2777 | { | |
2778 | buf_alloc *= 2; | |
2779 | buf = xrealloc (buf, buf_alloc); | |
2780 | } | |
2781 | ||
2782 | QUIT; | |
2783 | } | |
2784 | } | |
2785 | ||
2786 | /* Read target file FILENAME. Store the result in *BUF_P and return | |
2787 | the size of the transferred data. See the declaration in "target.h" | |
2788 | function for more information about the return value. */ | |
2789 | ||
2790 | LONGEST | |
2791 | target_fileio_read_alloc (const char *filename, gdb_byte **buf_p) | |
2792 | { | |
2793 | return target_fileio_read_alloc_1 (filename, buf_p, 0); | |
2794 | } | |
2795 | ||
2796 | /* Read target file FILENAME. The result is NUL-terminated and | |
2797 | returned as a string, allocated using xmalloc. If an error occurs | |
2798 | or the transfer is unsupported, NULL is returned. Empty objects | |
2799 | are returned as allocated but empty strings. A warning is issued | |
2800 | if the result contains any embedded NUL bytes. */ | |
2801 | ||
2802 | char * | |
2803 | target_fileio_read_stralloc (const char *filename) | |
2804 | { | |
39086a0e PA |
2805 | gdb_byte *buffer; |
2806 | char *bufstr; | |
7313baad UW |
2807 | LONGEST i, transferred; |
2808 | ||
39086a0e PA |
2809 | transferred = target_fileio_read_alloc_1 (filename, &buffer, 1); |
2810 | bufstr = (char *) buffer; | |
7313baad UW |
2811 | |
2812 | if (transferred < 0) | |
2813 | return NULL; | |
2814 | ||
2815 | if (transferred == 0) | |
2816 | return xstrdup (""); | |
2817 | ||
39086a0e | 2818 | bufstr[transferred] = 0; |
7313baad UW |
2819 | |
2820 | /* Check for embedded NUL bytes; but allow trailing NULs. */ | |
39086a0e PA |
2821 | for (i = strlen (bufstr); i < transferred; i++) |
2822 | if (bufstr[i] != 0) | |
7313baad UW |
2823 | { |
2824 | warning (_("target file %s " | |
2825 | "contained unexpected null characters"), | |
2826 | filename); | |
2827 | break; | |
2828 | } | |
2829 | ||
39086a0e | 2830 | return bufstr; |
7313baad UW |
2831 | } |
2832 | ||
2833 | ||
e0d24f8d | 2834 | static int |
31568a15 TT |
2835 | default_region_ok_for_hw_watchpoint (struct target_ops *self, |
2836 | CORE_ADDR addr, int len) | |
e0d24f8d | 2837 | { |
f5656ead | 2838 | return (len <= gdbarch_ptr_bit (target_gdbarch ()) / TARGET_CHAR_BIT); |
ccaa32c7 GS |
2839 | } |
2840 | ||
5009afc5 AS |
2841 | static int |
2842 | default_watchpoint_addr_within_range (struct target_ops *target, | |
2843 | CORE_ADDR addr, | |
2844 | CORE_ADDR start, int length) | |
2845 | { | |
2846 | return addr >= start && addr < start + length; | |
2847 | } | |
2848 | ||
c2250ad1 UW |
2849 | static struct gdbarch * |
2850 | default_thread_architecture (struct target_ops *ops, ptid_t ptid) | |
2851 | { | |
f5656ead | 2852 | return target_gdbarch (); |
c2250ad1 UW |
2853 | } |
2854 | ||
c906108c | 2855 | static int |
555bbdeb TT |
2856 | return_zero (struct target_ops *ignore) |
2857 | { | |
2858 | return 0; | |
2859 | } | |
2860 | ||
2861 | static int | |
2862 | return_zero_has_execution (struct target_ops *ignore, ptid_t ignore2) | |
c906108c SS |
2863 | { |
2864 | return 0; | |
2865 | } | |
2866 | ||
ed9a39eb JM |
2867 | /* |
2868 | * Find the next target down the stack from the specified target. | |
2869 | */ | |
2870 | ||
2871 | struct target_ops * | |
fba45db2 | 2872 | find_target_beneath (struct target_ops *t) |
ed9a39eb | 2873 | { |
258b763a | 2874 | return t->beneath; |
ed9a39eb JM |
2875 | } |
2876 | ||
8b06beed TT |
2877 | /* See target.h. */ |
2878 | ||
2879 | struct target_ops * | |
2880 | find_target_at (enum strata stratum) | |
2881 | { | |
2882 | struct target_ops *t; | |
2883 | ||
2884 | for (t = current_target.beneath; t != NULL; t = t->beneath) | |
2885 | if (t->to_stratum == stratum) | |
2886 | return t; | |
2887 | ||
2888 | return NULL; | |
2889 | } | |
2890 | ||
c906108c SS |
2891 | \f |
2892 | /* The inferior process has died. Long live the inferior! */ | |
2893 | ||
2894 | void | |
fba45db2 | 2895 | generic_mourn_inferior (void) |
c906108c | 2896 | { |
7f9f62ba | 2897 | ptid_t ptid; |
c906108c | 2898 | |
7f9f62ba | 2899 | ptid = inferior_ptid; |
39f77062 | 2900 | inferior_ptid = null_ptid; |
7f9f62ba | 2901 | |
f59f708a PA |
2902 | /* Mark breakpoints uninserted in case something tries to delete a |
2903 | breakpoint while we delete the inferior's threads (which would | |
2904 | fail, since the inferior is long gone). */ | |
2905 | mark_breakpoints_out (); | |
2906 | ||
7f9f62ba PA |
2907 | if (!ptid_equal (ptid, null_ptid)) |
2908 | { | |
2909 | int pid = ptid_get_pid (ptid); | |
6c95b8df | 2910 | exit_inferior (pid); |
7f9f62ba PA |
2911 | } |
2912 | ||
f59f708a PA |
2913 | /* Note this wipes step-resume breakpoints, so needs to be done |
2914 | after exit_inferior, which ends up referencing the step-resume | |
2915 | breakpoints through clear_thread_inferior_resources. */ | |
c906108c | 2916 | breakpoint_init_inferior (inf_exited); |
f59f708a | 2917 | |
c906108c SS |
2918 | registers_changed (); |
2919 | ||
c906108c SS |
2920 | reopen_exec_file (); |
2921 | reinit_frame_cache (); | |
2922 | ||
9a4105ab AC |
2923 | if (deprecated_detach_hook) |
2924 | deprecated_detach_hook (); | |
c906108c SS |
2925 | } |
2926 | \f | |
fd0a2a6f MK |
2927 | /* Convert a normal process ID to a string. Returns the string in a |
2928 | static buffer. */ | |
c906108c SS |
2929 | |
2930 | char * | |
39f77062 | 2931 | normal_pid_to_str (ptid_t ptid) |
c906108c | 2932 | { |
fd0a2a6f | 2933 | static char buf[32]; |
c906108c | 2934 | |
5fff8fc0 | 2935 | xsnprintf (buf, sizeof buf, "process %d", ptid_get_pid (ptid)); |
c906108c SS |
2936 | return buf; |
2937 | } | |
2938 | ||
2c0b251b | 2939 | static char * |
770234d3 | 2940 | default_pid_to_str (struct target_ops *ops, ptid_t ptid) |
117de6a9 PA |
2941 | { |
2942 | return normal_pid_to_str (ptid); | |
2943 | } | |
2944 | ||
9b4eba8e HZ |
2945 | /* Error-catcher for target_find_memory_regions. */ |
2946 | static int | |
2e73927c TT |
2947 | dummy_find_memory_regions (struct target_ops *self, |
2948 | find_memory_region_ftype ignore1, void *ignore2) | |
be4d1333 | 2949 | { |
9b4eba8e | 2950 | error (_("Command not implemented for this target.")); |
be4d1333 MS |
2951 | return 0; |
2952 | } | |
2953 | ||
9b4eba8e HZ |
2954 | /* Error-catcher for target_make_corefile_notes. */ |
2955 | static char * | |
fc6691b2 TT |
2956 | dummy_make_corefile_notes (struct target_ops *self, |
2957 | bfd *ignore1, int *ignore2) | |
be4d1333 | 2958 | { |
9b4eba8e | 2959 | error (_("Command not implemented for this target.")); |
be4d1333 MS |
2960 | return NULL; |
2961 | } | |
2962 | ||
c906108c SS |
2963 | /* Set up the handful of non-empty slots needed by the dummy target |
2964 | vector. */ | |
2965 | ||
2966 | static void | |
fba45db2 | 2967 | init_dummy_target (void) |
c906108c SS |
2968 | { |
2969 | dummy_target.to_shortname = "None"; | |
2970 | dummy_target.to_longname = "None"; | |
2971 | dummy_target.to_doc = ""; | |
03583c20 UW |
2972 | dummy_target.to_supports_disable_randomization |
2973 | = find_default_supports_disable_randomization; | |
c906108c | 2974 | dummy_target.to_stratum = dummy_stratum; |
555bbdeb TT |
2975 | dummy_target.to_has_all_memory = return_zero; |
2976 | dummy_target.to_has_memory = return_zero; | |
2977 | dummy_target.to_has_stack = return_zero; | |
2978 | dummy_target.to_has_registers = return_zero; | |
2979 | dummy_target.to_has_execution = return_zero_has_execution; | |
c906108c | 2980 | dummy_target.to_magic = OPS_MAGIC; |
1101cb7b TT |
2981 | |
2982 | install_dummy_methods (&dummy_target); | |
c906108c | 2983 | } |
c906108c | 2984 | \f |
c906108c | 2985 | |
f1c07ab0 | 2986 | void |
460014f5 | 2987 | target_close (struct target_ops *targ) |
f1c07ab0 | 2988 | { |
7fdc1521 TT |
2989 | gdb_assert (!target_is_pushed (targ)); |
2990 | ||
f1c07ab0 | 2991 | if (targ->to_xclose != NULL) |
460014f5 | 2992 | targ->to_xclose (targ); |
f1c07ab0 | 2993 | else if (targ->to_close != NULL) |
de90e03d | 2994 | targ->to_close (targ); |
947b8855 PA |
2995 | |
2996 | if (targetdebug) | |
460014f5 | 2997 | fprintf_unfiltered (gdb_stdlog, "target_close ()\n"); |
f1c07ab0 AC |
2998 | } |
2999 | ||
28439f5e PA |
3000 | int |
3001 | target_thread_alive (ptid_t ptid) | |
c906108c | 3002 | { |
a7068b60 | 3003 | return current_target.to_thread_alive (¤t_target, ptid); |
28439f5e PA |
3004 | } |
3005 | ||
3006 | void | |
3007 | target_find_new_threads (void) | |
3008 | { | |
09b0dc2b | 3009 | current_target.to_find_new_threads (¤t_target); |
c906108c SS |
3010 | } |
3011 | ||
d914c394 SS |
3012 | void |
3013 | target_stop (ptid_t ptid) | |
3014 | { | |
3015 | if (!may_stop) | |
3016 | { | |
3017 | warning (_("May not interrupt or stop the target, ignoring attempt")); | |
3018 | return; | |
3019 | } | |
3020 | ||
1eab8a48 | 3021 | (*current_target.to_stop) (¤t_target, ptid); |
d914c394 SS |
3022 | } |
3023 | ||
09826ec5 PA |
3024 | /* Concatenate ELEM to LIST, a comma separate list, and return the |
3025 | result. The LIST incoming argument is released. */ | |
3026 | ||
3027 | static char * | |
3028 | str_comma_list_concat_elem (char *list, const char *elem) | |
3029 | { | |
3030 | if (list == NULL) | |
3031 | return xstrdup (elem); | |
3032 | else | |
3033 | return reconcat (list, list, ", ", elem, (char *) NULL); | |
3034 | } | |
3035 | ||
3036 | /* Helper for target_options_to_string. If OPT is present in | |
3037 | TARGET_OPTIONS, append the OPT_STR (string version of OPT) in RET. | |
3038 | Returns the new resulting string. OPT is removed from | |
3039 | TARGET_OPTIONS. */ | |
3040 | ||
3041 | static char * | |
3042 | do_option (int *target_options, char *ret, | |
3043 | int opt, char *opt_str) | |
3044 | { | |
3045 | if ((*target_options & opt) != 0) | |
3046 | { | |
3047 | ret = str_comma_list_concat_elem (ret, opt_str); | |
3048 | *target_options &= ~opt; | |
3049 | } | |
3050 | ||
3051 | return ret; | |
3052 | } | |
3053 | ||
3054 | char * | |
3055 | target_options_to_string (int target_options) | |
3056 | { | |
3057 | char *ret = NULL; | |
3058 | ||
3059 | #define DO_TARG_OPTION(OPT) \ | |
3060 | ret = do_option (&target_options, ret, OPT, #OPT) | |
3061 | ||
3062 | DO_TARG_OPTION (TARGET_WNOHANG); | |
3063 | ||
3064 | if (target_options != 0) | |
3065 | ret = str_comma_list_concat_elem (ret, "unknown???"); | |
3066 | ||
3067 | if (ret == NULL) | |
3068 | ret = xstrdup (""); | |
3069 | return ret; | |
3070 | } | |
3071 | ||
bf0c5130 | 3072 | static void |
56be3814 UW |
3073 | debug_print_register (const char * func, |
3074 | struct regcache *regcache, int regno) | |
bf0c5130 | 3075 | { |
f8d29908 | 3076 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
5d502164 | 3077 | |
bf0c5130 | 3078 | fprintf_unfiltered (gdb_stdlog, "%s ", func); |
f8d29908 | 3079 | if (regno >= 0 && regno < gdbarch_num_regs (gdbarch) |
f8d29908 UW |
3080 | && gdbarch_register_name (gdbarch, regno) != NULL |
3081 | && gdbarch_register_name (gdbarch, regno)[0] != '\0') | |
3082 | fprintf_unfiltered (gdb_stdlog, "(%s)", | |
3083 | gdbarch_register_name (gdbarch, regno)); | |
bf0c5130 AC |
3084 | else |
3085 | fprintf_unfiltered (gdb_stdlog, "(%d)", regno); | |
0ff58721 | 3086 | if (regno >= 0 && regno < gdbarch_num_regs (gdbarch)) |
bf0c5130 | 3087 | { |
e17a4113 | 3088 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
f8d29908 | 3089 | int i, size = register_size (gdbarch, regno); |
e362b510 | 3090 | gdb_byte buf[MAX_REGISTER_SIZE]; |
5d502164 | 3091 | |
0ff58721 | 3092 | regcache_raw_collect (regcache, regno, buf); |
bf0c5130 | 3093 | fprintf_unfiltered (gdb_stdlog, " = "); |
81c4a259 | 3094 | for (i = 0; i < size; i++) |
bf0c5130 AC |
3095 | { |
3096 | fprintf_unfiltered (gdb_stdlog, "%02x", buf[i]); | |
3097 | } | |
81c4a259 | 3098 | if (size <= sizeof (LONGEST)) |
bf0c5130 | 3099 | { |
e17a4113 | 3100 | ULONGEST val = extract_unsigned_integer (buf, size, byte_order); |
5d502164 | 3101 | |
0b1553bc UW |
3102 | fprintf_unfiltered (gdb_stdlog, " %s %s", |
3103 | core_addr_to_string_nz (val), plongest (val)); | |
bf0c5130 AC |
3104 | } |
3105 | } | |
3106 | fprintf_unfiltered (gdb_stdlog, "\n"); | |
3107 | } | |
3108 | ||
28439f5e PA |
3109 | void |
3110 | target_fetch_registers (struct regcache *regcache, int regno) | |
c906108c | 3111 | { |
ad5989bd TT |
3112 | current_target.to_fetch_registers (¤t_target, regcache, regno); |
3113 | if (targetdebug) | |
3114 | debug_print_register ("target_fetch_registers", regcache, regno); | |
c906108c SS |
3115 | } |
3116 | ||
28439f5e PA |
3117 | void |
3118 | target_store_registers (struct regcache *regcache, int regno) | |
c906108c | 3119 | { |
28439f5e | 3120 | struct target_ops *t; |
5d502164 | 3121 | |
d914c394 SS |
3122 | if (!may_write_registers) |
3123 | error (_("Writing to registers is not allowed (regno %d)"), regno); | |
3124 | ||
6b84065d TT |
3125 | current_target.to_store_registers (¤t_target, regcache, regno); |
3126 | if (targetdebug) | |
28439f5e | 3127 | { |
6b84065d | 3128 | debug_print_register ("target_store_registers", regcache, regno); |
28439f5e | 3129 | } |
c906108c SS |
3130 | } |
3131 | ||
dc146f7c VP |
3132 | int |
3133 | target_core_of_thread (ptid_t ptid) | |
3134 | { | |
a7068b60 | 3135 | return current_target.to_core_of_thread (¤t_target, ptid); |
dc146f7c VP |
3136 | } |
3137 | ||
936d2992 PA |
3138 | int |
3139 | simple_verify_memory (struct target_ops *ops, | |
3140 | const gdb_byte *data, CORE_ADDR lma, ULONGEST size) | |
3141 | { | |
3142 | LONGEST total_xfered = 0; | |
3143 | ||
3144 | while (total_xfered < size) | |
3145 | { | |
3146 | ULONGEST xfered_len; | |
3147 | enum target_xfer_status status; | |
3148 | gdb_byte buf[1024]; | |
3149 | ULONGEST howmuch = min (sizeof (buf), size - total_xfered); | |
3150 | ||
3151 | status = target_xfer_partial (ops, TARGET_OBJECT_MEMORY, NULL, | |
3152 | buf, NULL, lma + total_xfered, howmuch, | |
3153 | &xfered_len); | |
3154 | if (status == TARGET_XFER_OK | |
3155 | && memcmp (data + total_xfered, buf, xfered_len) == 0) | |
3156 | { | |
3157 | total_xfered += xfered_len; | |
3158 | QUIT; | |
3159 | } | |
3160 | else | |
3161 | return 0; | |
3162 | } | |
3163 | return 1; | |
3164 | } | |
3165 | ||
3166 | /* Default implementation of memory verification. */ | |
3167 | ||
3168 | static int | |
3169 | default_verify_memory (struct target_ops *self, | |
3170 | const gdb_byte *data, CORE_ADDR memaddr, ULONGEST size) | |
3171 | { | |
3172 | /* Start over from the top of the target stack. */ | |
3173 | return simple_verify_memory (current_target.beneath, | |
3174 | data, memaddr, size); | |
3175 | } | |
3176 | ||
4a5e7a5b PA |
3177 | int |
3178 | target_verify_memory (const gdb_byte *data, CORE_ADDR memaddr, ULONGEST size) | |
3179 | { | |
a7068b60 TT |
3180 | return current_target.to_verify_memory (¤t_target, |
3181 | data, memaddr, size); | |
4a5e7a5b PA |
3182 | } |
3183 | ||
9c06b0b4 TJB |
3184 | /* The documentation for this function is in its prototype declaration in |
3185 | target.h. */ | |
3186 | ||
3187 | int | |
3188 | target_insert_mask_watchpoint (CORE_ADDR addr, CORE_ADDR mask, int rw) | |
3189 | { | |
a7068b60 TT |
3190 | return current_target.to_insert_mask_watchpoint (¤t_target, |
3191 | addr, mask, rw); | |
9c06b0b4 TJB |
3192 | } |
3193 | ||
3194 | /* The documentation for this function is in its prototype declaration in | |
3195 | target.h. */ | |
3196 | ||
3197 | int | |
3198 | target_remove_mask_watchpoint (CORE_ADDR addr, CORE_ADDR mask, int rw) | |
3199 | { | |
a7068b60 TT |
3200 | return current_target.to_remove_mask_watchpoint (¤t_target, |
3201 | addr, mask, rw); | |
9c06b0b4 TJB |
3202 | } |
3203 | ||
3204 | /* The documentation for this function is in its prototype declaration | |
3205 | in target.h. */ | |
3206 | ||
3207 | int | |
3208 | target_masked_watch_num_registers (CORE_ADDR addr, CORE_ADDR mask) | |
3209 | { | |
6c7e5e5c TT |
3210 | return current_target.to_masked_watch_num_registers (¤t_target, |
3211 | addr, mask); | |
9c06b0b4 TJB |
3212 | } |
3213 | ||
f1310107 TJB |
3214 | /* The documentation for this function is in its prototype declaration |
3215 | in target.h. */ | |
3216 | ||
3217 | int | |
3218 | target_ranged_break_num_registers (void) | |
3219 | { | |
a134316b | 3220 | return current_target.to_ranged_break_num_registers (¤t_target); |
f1310107 TJB |
3221 | } |
3222 | ||
02d27625 MM |
3223 | /* See target.h. */ |
3224 | ||
02d27625 MM |
3225 | struct btrace_target_info * |
3226 | target_enable_btrace (ptid_t ptid) | |
3227 | { | |
6dc7fcf4 | 3228 | return current_target.to_enable_btrace (¤t_target, ptid); |
02d27625 MM |
3229 | } |
3230 | ||
3231 | /* See target.h. */ | |
3232 | ||
3233 | void | |
3234 | target_disable_btrace (struct btrace_target_info *btinfo) | |
3235 | { | |
8dc292d3 | 3236 | current_target.to_disable_btrace (¤t_target, btinfo); |
02d27625 MM |
3237 | } |
3238 | ||
3239 | /* See target.h. */ | |
3240 | ||
3241 | void | |
3242 | target_teardown_btrace (struct btrace_target_info *btinfo) | |
3243 | { | |
9ace480d | 3244 | current_target.to_teardown_btrace (¤t_target, btinfo); |
02d27625 MM |
3245 | } |
3246 | ||
3247 | /* See target.h. */ | |
3248 | ||
969c39fb MM |
3249 | enum btrace_error |
3250 | target_read_btrace (VEC (btrace_block_s) **btrace, | |
3251 | struct btrace_target_info *btinfo, | |
02d27625 MM |
3252 | enum btrace_read_type type) |
3253 | { | |
eb5b20d4 | 3254 | return current_target.to_read_btrace (¤t_target, btrace, btinfo, type); |
02d27625 MM |
3255 | } |
3256 | ||
d02ed0bb MM |
3257 | /* See target.h. */ |
3258 | ||
7c1687a9 MM |
3259 | void |
3260 | target_stop_recording (void) | |
3261 | { | |
ee97f592 | 3262 | current_target.to_stop_recording (¤t_target); |
7c1687a9 MM |
3263 | } |
3264 | ||
3265 | /* See target.h. */ | |
3266 | ||
d02ed0bb | 3267 | void |
85e1311a | 3268 | target_save_record (const char *filename) |
d02ed0bb | 3269 | { |
f09e2107 | 3270 | current_target.to_save_record (¤t_target, filename); |
d02ed0bb MM |
3271 | } |
3272 | ||
3273 | /* See target.h. */ | |
3274 | ||
3275 | int | |
3276 | target_supports_delete_record (void) | |
3277 | { | |
3278 | struct target_ops *t; | |
3279 | ||
3280 | for (t = current_target.beneath; t != NULL; t = t->beneath) | |
b0ed115f TT |
3281 | if (t->to_delete_record != delegate_delete_record |
3282 | && t->to_delete_record != tdefault_delete_record) | |
d02ed0bb MM |
3283 | return 1; |
3284 | ||
3285 | return 0; | |
3286 | } | |
3287 | ||
3288 | /* See target.h. */ | |
3289 | ||
3290 | void | |
3291 | target_delete_record (void) | |
3292 | { | |
07366925 | 3293 | current_target.to_delete_record (¤t_target); |
d02ed0bb MM |
3294 | } |
3295 | ||
3296 | /* See target.h. */ | |
3297 | ||
3298 | int | |
3299 | target_record_is_replaying (void) | |
3300 | { | |
dd2e9d25 | 3301 | return current_target.to_record_is_replaying (¤t_target); |
d02ed0bb MM |
3302 | } |
3303 | ||
3304 | /* See target.h. */ | |
3305 | ||
3306 | void | |
3307 | target_goto_record_begin (void) | |
3308 | { | |
671e76cc | 3309 | current_target.to_goto_record_begin (¤t_target); |
d02ed0bb MM |
3310 | } |
3311 | ||
3312 | /* See target.h. */ | |
3313 | ||
3314 | void | |
3315 | target_goto_record_end (void) | |
3316 | { | |
e9179bb3 | 3317 | current_target.to_goto_record_end (¤t_target); |
d02ed0bb MM |
3318 | } |
3319 | ||
3320 | /* See target.h. */ | |
3321 | ||
3322 | void | |
3323 | target_goto_record (ULONGEST insn) | |
3324 | { | |
05969c84 | 3325 | current_target.to_goto_record (¤t_target, insn); |
d02ed0bb MM |
3326 | } |
3327 | ||
67c86d06 MM |
3328 | /* See target.h. */ |
3329 | ||
3330 | void | |
3331 | target_insn_history (int size, int flags) | |
3332 | { | |
3679abfa | 3333 | current_target.to_insn_history (¤t_target, size, flags); |
67c86d06 MM |
3334 | } |
3335 | ||
3336 | /* See target.h. */ | |
3337 | ||
3338 | void | |
3339 | target_insn_history_from (ULONGEST from, int size, int flags) | |
3340 | { | |
8444ab58 | 3341 | current_target.to_insn_history_from (¤t_target, from, size, flags); |
67c86d06 MM |
3342 | } |
3343 | ||
3344 | /* See target.h. */ | |
3345 | ||
3346 | void | |
3347 | target_insn_history_range (ULONGEST begin, ULONGEST end, int flags) | |
3348 | { | |
c29302cc | 3349 | current_target.to_insn_history_range (¤t_target, begin, end, flags); |
67c86d06 MM |
3350 | } |
3351 | ||
15984c13 MM |
3352 | /* See target.h. */ |
3353 | ||
3354 | void | |
3355 | target_call_history (int size, int flags) | |
3356 | { | |
170049d4 | 3357 | current_target.to_call_history (¤t_target, size, flags); |
15984c13 MM |
3358 | } |
3359 | ||
3360 | /* See target.h. */ | |
3361 | ||
3362 | void | |
3363 | target_call_history_from (ULONGEST begin, int size, int flags) | |
3364 | { | |
16fc27d6 | 3365 | current_target.to_call_history_from (¤t_target, begin, size, flags); |
15984c13 MM |
3366 | } |
3367 | ||
3368 | /* See target.h. */ | |
3369 | ||
3370 | void | |
3371 | target_call_history_range (ULONGEST begin, ULONGEST end, int flags) | |
3372 | { | |
115d9817 | 3373 | current_target.to_call_history_range (¤t_target, begin, end, flags); |
15984c13 MM |
3374 | } |
3375 | ||
ea001bdc MM |
3376 | /* See target.h. */ |
3377 | ||
3378 | const struct frame_unwind * | |
3379 | target_get_unwinder (void) | |
3380 | { | |
ac01945b | 3381 | return current_target.to_get_unwinder (¤t_target); |
ea001bdc MM |
3382 | } |
3383 | ||
3384 | /* See target.h. */ | |
3385 | ||
3386 | const struct frame_unwind * | |
3387 | target_get_tailcall_unwinder (void) | |
3388 | { | |
ac01945b | 3389 | return current_target.to_get_tailcall_unwinder (¤t_target); |
ea001bdc MM |
3390 | } |
3391 | ||
c0eca49f | 3392 | /* Default implementation of to_decr_pc_after_break. */ |
118e6252 | 3393 | |
c0eca49f TT |
3394 | static CORE_ADDR |
3395 | default_target_decr_pc_after_break (struct target_ops *ops, | |
118e6252 MM |
3396 | struct gdbarch *gdbarch) |
3397 | { | |
118e6252 MM |
3398 | return gdbarch_decr_pc_after_break (gdbarch); |
3399 | } | |
3400 | ||
3401 | /* See target.h. */ | |
3402 | ||
3403 | CORE_ADDR | |
3404 | target_decr_pc_after_break (struct gdbarch *gdbarch) | |
3405 | { | |
c0eca49f | 3406 | return current_target.to_decr_pc_after_break (¤t_target, gdbarch); |
118e6252 MM |
3407 | } |
3408 | ||
5fff78c4 MM |
3409 | /* See target.h. */ |
3410 | ||
3411 | void | |
3412 | target_prepare_to_generate_core (void) | |
3413 | { | |
3414 | current_target.to_prepare_to_generate_core (¤t_target); | |
3415 | } | |
3416 | ||
3417 | /* See target.h. */ | |
3418 | ||
3419 | void | |
3420 | target_done_generating_core (void) | |
3421 | { | |
3422 | current_target.to_done_generating_core (¤t_target); | |
3423 | } | |
3424 | ||
c906108c | 3425 | static void |
fba45db2 | 3426 | setup_target_debug (void) |
c906108c SS |
3427 | { |
3428 | memcpy (&debug_target, ¤t_target, sizeof debug_target); | |
3429 | ||
a7068b60 | 3430 | init_debug_target (¤t_target); |
c906108c | 3431 | } |
c906108c | 3432 | \f |
c5aa993b JM |
3433 | |
3434 | static char targ_desc[] = | |
3e43a32a MS |
3435 | "Names of targets and files being debugged.\nShows the entire \ |
3436 | stack of targets currently in use (including the exec-file,\n\ | |
c906108c SS |
3437 | core-file, and process, if any), as well as the symbol file name."; |
3438 | ||
a53f3625 | 3439 | static void |
a30bf1f1 TT |
3440 | default_rcmd (struct target_ops *self, const char *command, |
3441 | struct ui_file *output) | |
a53f3625 TT |
3442 | { |
3443 | error (_("\"monitor\" command not supported by this target.")); | |
3444 | } | |
3445 | ||
96baa820 JM |
3446 | static void |
3447 | do_monitor_command (char *cmd, | |
3448 | int from_tty) | |
3449 | { | |
96baa820 JM |
3450 | target_rcmd (cmd, gdb_stdtarg); |
3451 | } | |
3452 | ||
87680a14 JB |
3453 | /* Print the name of each layers of our target stack. */ |
3454 | ||
3455 | static void | |
3456 | maintenance_print_target_stack (char *cmd, int from_tty) | |
3457 | { | |
3458 | struct target_ops *t; | |
3459 | ||
3460 | printf_filtered (_("The current target stack is:\n")); | |
3461 | ||
3462 | for (t = target_stack; t != NULL; t = t->beneath) | |
3463 | { | |
3464 | printf_filtered (" - %s (%s)\n", t->to_shortname, t->to_longname); | |
3465 | } | |
3466 | } | |
3467 | ||
329ea579 PA |
3468 | /* Controls if targets can report that they can/are async. This is |
3469 | just for maintainers to use when debugging gdb. */ | |
3470 | int target_async_permitted = 1; | |
c6ebd6cf VP |
3471 | |
3472 | /* The set command writes to this variable. If the inferior is | |
b5419e49 | 3473 | executing, target_async_permitted is *not* updated. */ |
329ea579 | 3474 | static int target_async_permitted_1 = 1; |
c6ebd6cf VP |
3475 | |
3476 | static void | |
329ea579 PA |
3477 | maint_set_target_async_command (char *args, int from_tty, |
3478 | struct cmd_list_element *c) | |
c6ebd6cf | 3479 | { |
c35b1492 | 3480 | if (have_live_inferiors ()) |
c6ebd6cf VP |
3481 | { |
3482 | target_async_permitted_1 = target_async_permitted; | |
3483 | error (_("Cannot change this setting while the inferior is running.")); | |
3484 | } | |
3485 | ||
3486 | target_async_permitted = target_async_permitted_1; | |
3487 | } | |
3488 | ||
3489 | static void | |
329ea579 PA |
3490 | maint_show_target_async_command (struct ui_file *file, int from_tty, |
3491 | struct cmd_list_element *c, | |
3492 | const char *value) | |
c6ebd6cf | 3493 | { |
3e43a32a MS |
3494 | fprintf_filtered (file, |
3495 | _("Controlling the inferior in " | |
3496 | "asynchronous mode is %s.\n"), value); | |
c6ebd6cf VP |
3497 | } |
3498 | ||
d914c394 SS |
3499 | /* Temporary copies of permission settings. */ |
3500 | ||
3501 | static int may_write_registers_1 = 1; | |
3502 | static int may_write_memory_1 = 1; | |
3503 | static int may_insert_breakpoints_1 = 1; | |
3504 | static int may_insert_tracepoints_1 = 1; | |
3505 | static int may_insert_fast_tracepoints_1 = 1; | |
3506 | static int may_stop_1 = 1; | |
3507 | ||
3508 | /* Make the user-set values match the real values again. */ | |
3509 | ||
3510 | void | |
3511 | update_target_permissions (void) | |
3512 | { | |
3513 | may_write_registers_1 = may_write_registers; | |
3514 | may_write_memory_1 = may_write_memory; | |
3515 | may_insert_breakpoints_1 = may_insert_breakpoints; | |
3516 | may_insert_tracepoints_1 = may_insert_tracepoints; | |
3517 | may_insert_fast_tracepoints_1 = may_insert_fast_tracepoints; | |
3518 | may_stop_1 = may_stop; | |
3519 | } | |
3520 | ||
3521 | /* The one function handles (most of) the permission flags in the same | |
3522 | way. */ | |
3523 | ||
3524 | static void | |
3525 | set_target_permissions (char *args, int from_tty, | |
3526 | struct cmd_list_element *c) | |
3527 | { | |
3528 | if (target_has_execution) | |
3529 | { | |
3530 | update_target_permissions (); | |
3531 | error (_("Cannot change this setting while the inferior is running.")); | |
3532 | } | |
3533 | ||
3534 | /* Make the real values match the user-changed values. */ | |
3535 | may_write_registers = may_write_registers_1; | |
3536 | may_insert_breakpoints = may_insert_breakpoints_1; | |
3537 | may_insert_tracepoints = may_insert_tracepoints_1; | |
3538 | may_insert_fast_tracepoints = may_insert_fast_tracepoints_1; | |
3539 | may_stop = may_stop_1; | |
3540 | update_observer_mode (); | |
3541 | } | |
3542 | ||
3543 | /* Set memory write permission independently of observer mode. */ | |
3544 | ||
3545 | static void | |
3546 | set_write_memory_permission (char *args, int from_tty, | |
3547 | struct cmd_list_element *c) | |
3548 | { | |
3549 | /* Make the real values match the user-changed values. */ | |
3550 | may_write_memory = may_write_memory_1; | |
3551 | update_observer_mode (); | |
3552 | } | |
3553 | ||
3554 | ||
c906108c | 3555 | void |
fba45db2 | 3556 | initialize_targets (void) |
c906108c SS |
3557 | { |
3558 | init_dummy_target (); | |
3559 | push_target (&dummy_target); | |
3560 | ||
3561 | add_info ("target", target_info, targ_desc); | |
3562 | add_info ("files", target_info, targ_desc); | |
3563 | ||
ccce17b0 | 3564 | add_setshow_zuinteger_cmd ("target", class_maintenance, &targetdebug, _("\ |
85c07804 AC |
3565 | Set target debugging."), _("\ |
3566 | Show target debugging."), _("\ | |
333dabeb DJ |
3567 | When non-zero, target debugging is enabled. Higher numbers are more\n\ |
3568 | verbose. Changes do not take effect until the next \"run\" or \"target\"\n\ | |
85c07804 | 3569 | command."), |
ccce17b0 YQ |
3570 | NULL, |
3571 | show_targetdebug, | |
3572 | &setdebuglist, &showdebuglist); | |
3a11626d | 3573 | |
2bc416ba | 3574 | add_setshow_boolean_cmd ("trust-readonly-sections", class_support, |
7915a72c AC |
3575 | &trust_readonly, _("\ |
3576 | Set mode for reading from readonly sections."), _("\ | |
3577 | Show mode for reading from readonly sections."), _("\ | |
3a11626d MS |
3578 | When this mode is on, memory reads from readonly sections (such as .text)\n\ |
3579 | will be read from the object file instead of from the target. This will\n\ | |
7915a72c | 3580 | result in significant performance improvement for remote targets."), |
2c5b56ce | 3581 | NULL, |
920d2a44 | 3582 | show_trust_readonly, |
e707bbc2 | 3583 | &setlist, &showlist); |
96baa820 JM |
3584 | |
3585 | add_com ("monitor", class_obscure, do_monitor_command, | |
1bedd215 | 3586 | _("Send a command to the remote monitor (remote targets only).")); |
96baa820 | 3587 | |
87680a14 JB |
3588 | add_cmd ("target-stack", class_maintenance, maintenance_print_target_stack, |
3589 | _("Print the name of each layer of the internal target stack."), | |
3590 | &maintenanceprintlist); | |
3591 | ||
c6ebd6cf VP |
3592 | add_setshow_boolean_cmd ("target-async", no_class, |
3593 | &target_async_permitted_1, _("\ | |
3594 | Set whether gdb controls the inferior in asynchronous mode."), _("\ | |
3595 | Show whether gdb controls the inferior in asynchronous mode."), _("\ | |
3596 | Tells gdb whether to control the inferior in asynchronous mode."), | |
329ea579 PA |
3597 | maint_set_target_async_command, |
3598 | maint_show_target_async_command, | |
3599 | &maintenance_set_cmdlist, | |
3600 | &maintenance_show_cmdlist); | |
c6ebd6cf | 3601 | |
d914c394 SS |
3602 | add_setshow_boolean_cmd ("may-write-registers", class_support, |
3603 | &may_write_registers_1, _("\ | |
3604 | Set permission to write into registers."), _("\ | |
3605 | Show permission to write into registers."), _("\ | |
3606 | When this permission is on, GDB may write into the target's registers.\n\ | |
3607 | Otherwise, any sort of write attempt will result in an error."), | |
3608 | set_target_permissions, NULL, | |
3609 | &setlist, &showlist); | |
3610 | ||
3611 | add_setshow_boolean_cmd ("may-write-memory", class_support, | |
3612 | &may_write_memory_1, _("\ | |
3613 | Set permission to write into target memory."), _("\ | |
3614 | Show permission to write into target memory."), _("\ | |
3615 | When this permission is on, GDB may write into the target's memory.\n\ | |
3616 | Otherwise, any sort of write attempt will result in an error."), | |
3617 | set_write_memory_permission, NULL, | |
3618 | &setlist, &showlist); | |
3619 | ||
3620 | add_setshow_boolean_cmd ("may-insert-breakpoints", class_support, | |
3621 | &may_insert_breakpoints_1, _("\ | |
3622 | Set permission to insert breakpoints in the target."), _("\ | |
3623 | Show permission to insert breakpoints in the target."), _("\ | |
3624 | When this permission is on, GDB may insert breakpoints in the program.\n\ | |
3625 | Otherwise, any sort of insertion attempt will result in an error."), | |
3626 | set_target_permissions, NULL, | |
3627 | &setlist, &showlist); | |
3628 | ||
3629 | add_setshow_boolean_cmd ("may-insert-tracepoints", class_support, | |
3630 | &may_insert_tracepoints_1, _("\ | |
3631 | Set permission to insert tracepoints in the target."), _("\ | |
3632 | Show permission to insert tracepoints in the target."), _("\ | |
3633 | When this permission is on, GDB may insert tracepoints in the program.\n\ | |
3634 | Otherwise, any sort of insertion attempt will result in an error."), | |
3635 | set_target_permissions, NULL, | |
3636 | &setlist, &showlist); | |
3637 | ||
3638 | add_setshow_boolean_cmd ("may-insert-fast-tracepoints", class_support, | |
3639 | &may_insert_fast_tracepoints_1, _("\ | |
3640 | Set permission to insert fast tracepoints in the target."), _("\ | |
3641 | Show permission to insert fast tracepoints in the target."), _("\ | |
3642 | When this permission is on, GDB may insert fast tracepoints.\n\ | |
3643 | Otherwise, any sort of insertion attempt will result in an error."), | |
3644 | set_target_permissions, NULL, | |
3645 | &setlist, &showlist); | |
3646 | ||
3647 | add_setshow_boolean_cmd ("may-interrupt", class_support, | |
3648 | &may_stop_1, _("\ | |
3649 | Set permission to interrupt or signal the target."), _("\ | |
3650 | Show permission to interrupt or signal the target."), _("\ | |
3651 | When this permission is on, GDB may interrupt/stop the target's execution.\n\ | |
3652 | Otherwise, any attempt to interrupt or stop will be ignored."), | |
3653 | set_target_permissions, NULL, | |
3654 | &setlist, &showlist); | |
6a3cb8e8 PA |
3655 | |
3656 | add_setshow_boolean_cmd ("auto-connect-native-target", class_support, | |
3657 | &auto_connect_native_target, _("\ | |
3658 | Set whether GDB may automatically connect to the native target."), _("\ | |
3659 | Show whether GDB may automatically connect to the native target."), _("\ | |
3660 | When on, and GDB is not connected to a target yet, GDB\n\ | |
3661 | attempts \"run\" and other commands with the native target."), | |
3662 | NULL, show_auto_connect_native_target, | |
3663 | &setlist, &showlist); | |
c906108c | 3664 | } |