1 /* Select target systems and architectures at runtime for GDB.
3 Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
4 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
5 Free Software Foundation, Inc.
7 Contributed by Cygnus Support.
9 This file is part of GDB.
11 This program is free software; you can redistribute it and/or modify
12 it under the terms of the GNU General Public License as published by
13 the Free Software Foundation; either version 3 of the License, or
14 (at your option) any later version.
16 This program is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 GNU General Public License for more details.
21 You should have received a copy of the GNU General Public License
22 along with this program. If not, see <http://www.gnu.org/licenses/>. */
26 #include "gdb_string.h"
38 #include "gdb_assert.h"
40 #include "exceptions.h"
41 #include "target-descriptions.h"
42 #include "gdbthread.h"
45 static void target_info (char *, int);
47 static void kill_or_be_killed (int);
49 static void default_terminal_info (char *, int);
51 static int default_watchpoint_addr_within_range (struct target_ops *,
52 CORE_ADDR, CORE_ADDR, int);
54 static int default_region_ok_for_hw_watchpoint (CORE_ADDR, int);
56 static int nosymbol (char *, CORE_ADDR *);
58 static void tcomplain (void) ATTR_NORETURN;
60 static int nomemory (CORE_ADDR, char *, int, int, struct target_ops *);
62 static int return_zero (void);
64 static int return_one (void);
66 static int return_minus_one (void);
68 void target_ignore (void);
70 static void target_command (char *, int);
72 static struct target_ops *find_default_run_target (char *);
74 static void nosupport_runtime (void);
76 static LONGEST default_xfer_partial (struct target_ops *ops,
77 enum target_object object,
78 const char *annex, gdb_byte *readbuf,
79 const gdb_byte *writebuf,
80 ULONGEST offset, LONGEST len);
82 static LONGEST current_xfer_partial (struct target_ops *ops,
83 enum target_object object,
84 const char *annex, gdb_byte *readbuf,
85 const gdb_byte *writebuf,
86 ULONGEST offset, LONGEST len);
88 static LONGEST target_xfer_partial (struct target_ops *ops,
89 enum target_object object,
91 void *readbuf, const void *writebuf,
92 ULONGEST offset, LONGEST len);
94 static void init_dummy_target (void);
96 static struct target_ops debug_target;
98 static void debug_to_open (char *, int);
100 static void debug_to_prepare_to_store (struct regcache *);
102 static void debug_to_files_info (struct target_ops *);
104 static int debug_to_insert_breakpoint (struct bp_target_info *);
106 static int debug_to_remove_breakpoint (struct bp_target_info *);
108 static int debug_to_can_use_hw_breakpoint (int, int, int);
110 static int debug_to_insert_hw_breakpoint (struct bp_target_info *);
112 static int debug_to_remove_hw_breakpoint (struct bp_target_info *);
114 static int debug_to_insert_watchpoint (CORE_ADDR, int, int);
116 static int debug_to_remove_watchpoint (CORE_ADDR, int, int);
118 static int debug_to_stopped_by_watchpoint (void);
120 static int debug_to_stopped_data_address (struct target_ops *, CORE_ADDR *);
122 static int debug_to_watchpoint_addr_within_range (struct target_ops *,
123 CORE_ADDR, CORE_ADDR, int);
125 static int debug_to_region_ok_for_hw_watchpoint (CORE_ADDR, int);
127 static void debug_to_terminal_init (void);
129 static void debug_to_terminal_inferior (void);
131 static void debug_to_terminal_ours_for_output (void);
133 static void debug_to_terminal_save_ours (void);
135 static void debug_to_terminal_ours (void);
137 static void debug_to_terminal_info (char *, int);
139 static void debug_to_kill (void);
141 static void debug_to_load (char *, int);
143 static int debug_to_lookup_symbol (char *, CORE_ADDR *);
145 static int debug_to_can_run (void);
147 static void debug_to_notice_signals (ptid_t);
149 static void debug_to_stop (ptid_t);
151 /* NOTE: cagney/2004-09-29: Many targets reference this variable in
152 wierd and mysterious ways. Putting the variable here lets those
153 wierd and mysterious ways keep building while they are being
154 converted to the inferior inheritance structure. */
155 struct target_ops deprecated_child_ops;
157 /* Pointer to array of target architecture structures; the size of the
158 array; the current index into the array; the allocated size of the
160 struct target_ops **target_structs;
161 unsigned target_struct_size;
162 unsigned target_struct_index;
163 unsigned target_struct_allocsize;
164 #define DEFAULT_ALLOCSIZE 10
166 /* The initial current target, so that there is always a semi-valid
169 static struct target_ops dummy_target;
171 /* Top of target stack. */
173 static struct target_ops *target_stack;
175 /* The target structure we are currently using to talk to a process
176 or file or whatever "inferior" we have. */
178 struct target_ops current_target;
180 /* Command list for target. */
182 static struct cmd_list_element *targetlist = NULL;
184 /* Nonzero if we should trust readonly sections from the
185 executable when reading memory. */
187 static int trust_readonly = 0;
189 /* Nonzero if we should show true memory content including
190 memory breakpoint inserted by gdb. */
192 static int show_memory_breakpoints = 0;
194 /* Non-zero if we want to see trace of target level stuff. */
196 static int targetdebug = 0;
198 show_targetdebug (struct ui_file *file, int from_tty,
199 struct cmd_list_element *c, const char *value)
201 fprintf_filtered (file, _("Target debugging is %s.\n"), value);
204 static void setup_target_debug (void);
206 DCACHE *target_dcache;
208 /* The user just typed 'target' without the name of a target. */
211 target_command (char *arg, int from_tty)
213 fputs_filtered ("Argument required (target name). Try `help target'\n",
217 /* Add a possible target architecture to the list. */
220 add_target (struct target_ops *t)
222 /* Provide default values for all "must have" methods. */
223 if (t->to_xfer_partial == NULL)
224 t->to_xfer_partial = default_xfer_partial;
228 target_struct_allocsize = DEFAULT_ALLOCSIZE;
229 target_structs = (struct target_ops **) xmalloc
230 (target_struct_allocsize * sizeof (*target_structs));
232 if (target_struct_size >= target_struct_allocsize)
234 target_struct_allocsize *= 2;
235 target_structs = (struct target_ops **)
236 xrealloc ((char *) target_structs,
237 target_struct_allocsize * sizeof (*target_structs));
239 target_structs[target_struct_size++] = t;
241 if (targetlist == NULL)
242 add_prefix_cmd ("target", class_run, target_command, _("\
243 Connect to a target machine or process.\n\
244 The first argument is the type or protocol of the target machine.\n\
245 Remaining arguments are interpreted by the target protocol. For more\n\
246 information on the arguments for a particular protocol, type\n\
247 `help target ' followed by the protocol name."),
248 &targetlist, "target ", 0, &cmdlist);
249 add_cmd (t->to_shortname, no_class, t->to_open, t->to_doc, &targetlist);
260 target_load (char *arg, int from_tty)
262 dcache_invalidate (target_dcache);
263 (*current_target.to_load) (arg, from_tty);
267 target_create_inferior (char *exec_file, char *args,
268 char **env, int from_tty)
270 struct target_ops *t;
271 for (t = current_target.beneath; t != NULL; t = t->beneath)
273 if (t->to_create_inferior != NULL)
275 t->to_create_inferior (t, exec_file, args, env, from_tty);
277 fprintf_unfiltered (gdb_stdlog,
278 "target_create_inferior (%s, %s, xxx, %d)\n",
279 exec_file, args, from_tty);
284 internal_error (__FILE__, __LINE__,
285 "could not find a target to create inferior");
290 nomemory (CORE_ADDR memaddr, char *myaddr, int len, int write,
291 struct target_ops *t)
293 errno = EIO; /* Can't read/write this location */
294 return 0; /* No bytes handled */
300 error (_("You can't do that when your target is `%s'"),
301 current_target.to_shortname);
307 error (_("You can't do that without a process to debug."));
311 nosymbol (char *name, CORE_ADDR *addrp)
313 return 1; /* Symbol does not exist in target env */
317 nosupport_runtime (void)
319 if (ptid_equal (inferior_ptid, null_ptid))
322 error (_("No run-time support for this"));
327 default_terminal_info (char *args, int from_tty)
329 printf_unfiltered (_("No saved terminal information.\n"));
332 /* This is the default target_create_inferior and target_attach function.
333 If the current target is executing, it asks whether to kill it off.
334 If this function returns without calling error(), it has killed off
335 the target, and the operation should be attempted. */
338 kill_or_be_killed (int from_tty)
340 if (target_has_execution)
342 printf_unfiltered (_("You are already running a program:\n"));
343 target_files_info ();
344 if (query ("Kill it? "))
347 if (target_has_execution)
348 error (_("Killing the program did not help."));
353 error (_("Program not killed."));
359 /* A default implementation for the to_get_ada_task_ptid target method.
361 This function builds the PTID by using both LWP and TID as part of
362 the PTID lwp and tid elements. The pid used is the pid of the
366 default_get_ada_task_ptid (long lwp, long tid)
368 return ptid_build (ptid_get_pid (inferior_ptid), lwp, tid);
371 /* Go through the target stack from top to bottom, copying over zero
372 entries in current_target, then filling in still empty entries. In
373 effect, we are doing class inheritance through the pushed target
376 NOTE: cagney/2003-10-17: The problem with this inheritance, as it
377 is currently implemented, is that it discards any knowledge of
378 which target an inherited method originally belonged to.
379 Consequently, new new target methods should instead explicitly and
380 locally search the target stack for the target that can handle the
384 update_current_target (void)
386 struct target_ops *t;
388 /* First, reset current's contents. */
389 memset (¤t_target, 0, sizeof (current_target));
391 #define INHERIT(FIELD, TARGET) \
392 if (!current_target.FIELD) \
393 current_target.FIELD = (TARGET)->FIELD
395 for (t = target_stack; t; t = t->beneath)
397 INHERIT (to_shortname, t);
398 INHERIT (to_longname, t);
400 /* Do not inherit to_open. */
401 /* Do not inherit to_close. */
402 /* Do not inherit to_attach. */
403 INHERIT (to_post_attach, t);
404 INHERIT (to_attach_no_wait, t);
405 /* Do not inherit to_detach. */
406 /* Do not inherit to_disconnect. */
407 /* Do not inherit to_resume. */
408 /* Do not inherit to_wait. */
409 /* Do not inherit to_fetch_registers. */
410 /* Do not inherit to_store_registers. */
411 INHERIT (to_prepare_to_store, t);
412 INHERIT (deprecated_xfer_memory, t);
413 INHERIT (to_files_info, t);
414 INHERIT (to_insert_breakpoint, t);
415 INHERIT (to_remove_breakpoint, t);
416 INHERIT (to_can_use_hw_breakpoint, t);
417 INHERIT (to_insert_hw_breakpoint, t);
418 INHERIT (to_remove_hw_breakpoint, t);
419 INHERIT (to_insert_watchpoint, t);
420 INHERIT (to_remove_watchpoint, t);
421 INHERIT (to_stopped_data_address, t);
422 INHERIT (to_have_steppable_watchpoint, t);
423 INHERIT (to_have_continuable_watchpoint, t);
424 INHERIT (to_stopped_by_watchpoint, t);
425 INHERIT (to_watchpoint_addr_within_range, t);
426 INHERIT (to_region_ok_for_hw_watchpoint, t);
427 INHERIT (to_terminal_init, t);
428 INHERIT (to_terminal_inferior, t);
429 INHERIT (to_terminal_ours_for_output, t);
430 INHERIT (to_terminal_ours, t);
431 INHERIT (to_terminal_save_ours, t);
432 INHERIT (to_terminal_info, t);
433 INHERIT (to_kill, t);
434 INHERIT (to_load, t);
435 INHERIT (to_lookup_symbol, t);
436 /* Do no inherit to_create_inferior. */
437 INHERIT (to_post_startup_inferior, t);
438 INHERIT (to_acknowledge_created_inferior, t);
439 INHERIT (to_insert_fork_catchpoint, t);
440 INHERIT (to_remove_fork_catchpoint, t);
441 INHERIT (to_insert_vfork_catchpoint, t);
442 INHERIT (to_remove_vfork_catchpoint, t);
443 /* Do not inherit to_follow_fork. */
444 INHERIT (to_insert_exec_catchpoint, t);
445 INHERIT (to_remove_exec_catchpoint, t);
446 INHERIT (to_has_exited, t);
447 /* Do not inherit to_mourn_inferiour. */
448 INHERIT (to_can_run, t);
449 INHERIT (to_notice_signals, t);
450 /* Do not inherit to_thread_alive. */
451 /* Do not inherit to_find_new_threads. */
452 /* Do not inherit to_pid_to_str. */
453 INHERIT (to_extra_thread_info, t);
454 INHERIT (to_stop, t);
455 /* Do not inherit to_xfer_partial. */
456 INHERIT (to_rcmd, t);
457 INHERIT (to_pid_to_exec_file, t);
458 INHERIT (to_log_command, t);
459 INHERIT (to_stratum, t);
460 INHERIT (to_has_all_memory, t);
461 INHERIT (to_has_memory, t);
462 INHERIT (to_has_stack, t);
463 INHERIT (to_has_registers, t);
464 INHERIT (to_has_execution, t);
465 INHERIT (to_has_thread_control, t);
466 INHERIT (to_sections, t);
467 INHERIT (to_sections_end, t);
468 INHERIT (to_can_async_p, t);
469 INHERIT (to_is_async_p, t);
470 INHERIT (to_async, t);
471 INHERIT (to_async_mask, t);
472 INHERIT (to_find_memory_regions, t);
473 INHERIT (to_make_corefile_notes, t);
474 /* Do not inherit to_get_thread_local_address. */
475 INHERIT (to_can_execute_reverse, t);
476 /* Do not inherit to_read_description. */
477 INHERIT (to_get_ada_task_ptid, t);
478 /* Do not inherit to_search_memory. */
479 INHERIT (to_supports_multi_process, t);
480 INHERIT (to_magic, t);
481 /* Do not inherit to_memory_map. */
482 /* Do not inherit to_flash_erase. */
483 /* Do not inherit to_flash_done. */
487 /* Clean up a target struct so it no longer has any zero pointers in
488 it. Some entries are defaulted to a method that print an error,
489 others are hard-wired to a standard recursive default. */
491 #define de_fault(field, value) \
492 if (!current_target.field) \
493 current_target.field = value
496 (void (*) (char *, int))
501 de_fault (to_post_attach,
504 de_fault (to_prepare_to_store,
505 (void (*) (struct regcache *))
507 de_fault (deprecated_xfer_memory,
508 (int (*) (CORE_ADDR, gdb_byte *, int, int, struct mem_attrib *, struct target_ops *))
510 de_fault (to_files_info,
511 (void (*) (struct target_ops *))
513 de_fault (to_insert_breakpoint,
514 memory_insert_breakpoint);
515 de_fault (to_remove_breakpoint,
516 memory_remove_breakpoint);
517 de_fault (to_can_use_hw_breakpoint,
518 (int (*) (int, int, int))
520 de_fault (to_insert_hw_breakpoint,
521 (int (*) (struct bp_target_info *))
523 de_fault (to_remove_hw_breakpoint,
524 (int (*) (struct bp_target_info *))
526 de_fault (to_insert_watchpoint,
527 (int (*) (CORE_ADDR, int, int))
529 de_fault (to_remove_watchpoint,
530 (int (*) (CORE_ADDR, int, int))
532 de_fault (to_stopped_by_watchpoint,
535 de_fault (to_stopped_data_address,
536 (int (*) (struct target_ops *, CORE_ADDR *))
538 de_fault (to_watchpoint_addr_within_range,
539 default_watchpoint_addr_within_range);
540 de_fault (to_region_ok_for_hw_watchpoint,
541 default_region_ok_for_hw_watchpoint);
542 de_fault (to_terminal_init,
545 de_fault (to_terminal_inferior,
548 de_fault (to_terminal_ours_for_output,
551 de_fault (to_terminal_ours,
554 de_fault (to_terminal_save_ours,
557 de_fault (to_terminal_info,
558 default_terminal_info);
563 (void (*) (char *, int))
565 de_fault (to_lookup_symbol,
566 (int (*) (char *, CORE_ADDR *))
568 de_fault (to_post_startup_inferior,
571 de_fault (to_acknowledge_created_inferior,
574 de_fault (to_insert_fork_catchpoint,
577 de_fault (to_remove_fork_catchpoint,
580 de_fault (to_insert_vfork_catchpoint,
583 de_fault (to_remove_vfork_catchpoint,
586 de_fault (to_insert_exec_catchpoint,
589 de_fault (to_remove_exec_catchpoint,
592 de_fault (to_has_exited,
593 (int (*) (int, int, int *))
595 de_fault (to_can_run,
597 de_fault (to_notice_signals,
600 de_fault (to_extra_thread_info,
601 (char *(*) (struct thread_info *))
606 current_target.to_xfer_partial = current_xfer_partial;
608 (void (*) (char *, struct ui_file *))
610 de_fault (to_pid_to_exec_file,
614 (void (*) (void (*) (enum inferior_event_type, void*), void*))
616 de_fault (to_async_mask,
619 current_target.to_read_description = NULL;
620 de_fault (to_get_ada_task_ptid,
621 (ptid_t (*) (long, long))
622 default_get_ada_task_ptid);
623 de_fault (to_supports_multi_process,
628 /* Finally, position the target-stack beneath the squashed
629 "current_target". That way code looking for a non-inherited
630 target method can quickly and simply find it. */
631 current_target.beneath = target_stack;
634 setup_target_debug ();
637 /* Mark OPS as a running target. This reverses the effect
638 of target_mark_exited. */
641 target_mark_running (struct target_ops *ops)
643 struct target_ops *t;
645 for (t = target_stack; t != NULL; t = t->beneath)
649 internal_error (__FILE__, __LINE__,
650 "Attempted to mark unpushed target \"%s\" as running",
653 ops->to_has_execution = 1;
654 ops->to_has_all_memory = 1;
655 ops->to_has_memory = 1;
656 ops->to_has_stack = 1;
657 ops->to_has_registers = 1;
659 update_current_target ();
662 /* Mark OPS as a non-running target. This reverses the effect
663 of target_mark_running. */
666 target_mark_exited (struct target_ops *ops)
668 struct target_ops *t;
670 for (t = target_stack; t != NULL; t = t->beneath)
674 internal_error (__FILE__, __LINE__,
675 "Attempted to mark unpushed target \"%s\" as running",
678 ops->to_has_execution = 0;
679 ops->to_has_all_memory = 0;
680 ops->to_has_memory = 0;
681 ops->to_has_stack = 0;
682 ops->to_has_registers = 0;
684 update_current_target ();
687 /* Push a new target type into the stack of the existing target accessors,
688 possibly superseding some of the existing accessors.
690 Result is zero if the pushed target ended up on top of the stack,
691 nonzero if at least one target is on top of it.
693 Rather than allow an empty stack, we always have the dummy target at
694 the bottom stratum, so we can call the function vectors without
698 push_target (struct target_ops *t)
700 struct target_ops **cur;
702 /* Check magic number. If wrong, it probably means someone changed
703 the struct definition, but not all the places that initialize one. */
704 if (t->to_magic != OPS_MAGIC)
706 fprintf_unfiltered (gdb_stderr,
707 "Magic number of %s target struct wrong\n",
709 internal_error (__FILE__, __LINE__, _("failed internal consistency check"));
712 /* Find the proper stratum to install this target in. */
713 for (cur = &target_stack; (*cur) != NULL; cur = &(*cur)->beneath)
715 if ((int) (t->to_stratum) >= (int) (*cur)->to_stratum)
719 /* If there's already targets at this stratum, remove them. */
720 /* FIXME: cagney/2003-10-15: I think this should be popping all
721 targets to CUR, and not just those at this stratum level. */
722 while ((*cur) != NULL && t->to_stratum == (*cur)->to_stratum)
724 /* There's already something at this stratum level. Close it,
725 and un-hook it from the stack. */
726 struct target_ops *tmp = (*cur);
727 (*cur) = (*cur)->beneath;
729 target_close (tmp, 0);
732 /* We have removed all targets in our stratum, now add the new one. */
736 update_current_target ();
739 return (t != target_stack);
742 /* Remove a target_ops vector from the stack, wherever it may be.
743 Return how many times it was removed (0 or 1). */
746 unpush_target (struct target_ops *t)
748 struct target_ops **cur;
749 struct target_ops *tmp;
751 if (t->to_stratum == dummy_stratum)
752 internal_error (__FILE__, __LINE__,
753 "Attempt to unpush the dummy target");
755 /* Look for the specified target. Note that we assume that a target
756 can only occur once in the target stack. */
758 for (cur = &target_stack; (*cur) != NULL; cur = &(*cur)->beneath)
765 return 0; /* Didn't find target_ops, quit now */
767 /* NOTE: cagney/2003-12-06: In '94 the close call was made
768 unconditional by moving it to before the above check that the
769 target was in the target stack (something about "Change the way
770 pushing and popping of targets work to support target overlays
771 and inheritance"). This doesn't make much sense - only open
772 targets should be closed. */
775 /* Unchain the target */
777 (*cur) = (*cur)->beneath;
780 update_current_target ();
788 target_close (target_stack, 0); /* Let it clean up */
789 if (unpush_target (target_stack) == 1)
792 fprintf_unfiltered (gdb_stderr,
793 "pop_target couldn't find target %s\n",
794 current_target.to_shortname);
795 internal_error (__FILE__, __LINE__, _("failed internal consistency check"));
799 pop_all_targets_above (enum strata above_stratum, int quitting)
801 while ((int) (current_target.to_stratum) > (int) above_stratum)
803 target_close (target_stack, quitting);
804 if (!unpush_target (target_stack))
806 fprintf_unfiltered (gdb_stderr,
807 "pop_all_targets couldn't find target %s\n",
808 target_stack->to_shortname);
809 internal_error (__FILE__, __LINE__,
810 _("failed internal consistency check"));
817 pop_all_targets (int quitting)
819 pop_all_targets_above (dummy_stratum, quitting);
822 /* Using the objfile specified in OBJFILE, find the address for the
823 current thread's thread-local storage with offset OFFSET. */
825 target_translate_tls_address (struct objfile *objfile, CORE_ADDR offset)
827 volatile CORE_ADDR addr = 0;
828 struct target_ops *target;
830 for (target = current_target.beneath;
832 target = target->beneath)
834 if (target->to_get_thread_local_address != NULL)
839 && gdbarch_fetch_tls_load_module_address_p (target_gdbarch))
841 ptid_t ptid = inferior_ptid;
842 volatile struct gdb_exception ex;
844 TRY_CATCH (ex, RETURN_MASK_ALL)
848 /* Fetch the load module address for this objfile. */
849 lm_addr = gdbarch_fetch_tls_load_module_address (target_gdbarch,
851 /* If it's 0, throw the appropriate exception. */
853 throw_error (TLS_LOAD_MODULE_NOT_FOUND_ERROR,
854 _("TLS load module not found"));
856 addr = target->to_get_thread_local_address (target, ptid, lm_addr, offset);
858 /* If an error occurred, print TLS related messages here. Otherwise,
859 throw the error to some higher catcher. */
862 int objfile_is_library = (objfile->flags & OBJF_SHARED);
866 case TLS_NO_LIBRARY_SUPPORT_ERROR:
867 error (_("Cannot find thread-local variables in this thread library."));
869 case TLS_LOAD_MODULE_NOT_FOUND_ERROR:
870 if (objfile_is_library)
871 error (_("Cannot find shared library `%s' in dynamic"
872 " linker's load module list"), objfile->name);
874 error (_("Cannot find executable file `%s' in dynamic"
875 " linker's load module list"), objfile->name);
877 case TLS_NOT_ALLOCATED_YET_ERROR:
878 if (objfile_is_library)
879 error (_("The inferior has not yet allocated storage for"
880 " thread-local variables in\n"
881 "the shared library `%s'\n"
883 objfile->name, target_pid_to_str (ptid));
885 error (_("The inferior has not yet allocated storage for"
886 " thread-local variables in\n"
887 "the executable `%s'\n"
889 objfile->name, target_pid_to_str (ptid));
891 case TLS_GENERIC_ERROR:
892 if (objfile_is_library)
893 error (_("Cannot find thread-local storage for %s, "
894 "shared library %s:\n%s"),
895 target_pid_to_str (ptid),
896 objfile->name, ex.message);
898 error (_("Cannot find thread-local storage for %s, "
899 "executable file %s:\n%s"),
900 target_pid_to_str (ptid),
901 objfile->name, ex.message);
904 throw_exception (ex);
909 /* It wouldn't be wrong here to try a gdbarch method, too; finding
910 TLS is an ABI-specific thing. But we don't do that yet. */
912 error (_("Cannot find thread-local variables on this target"));
918 #define MIN(A, B) (((A) <= (B)) ? (A) : (B))
920 /* target_read_string -- read a null terminated string, up to LEN bytes,
921 from MEMADDR in target. Set *ERRNOP to the errno code, or 0 if successful.
922 Set *STRING to a pointer to malloc'd memory containing the data; the caller
923 is responsible for freeing it. Return the number of bytes successfully
927 target_read_string (CORE_ADDR memaddr, char **string, int len, int *errnop)
929 int tlen, origlen, offset, i;
933 int buffer_allocated;
935 unsigned int nbytes_read = 0;
939 /* Small for testing. */
940 buffer_allocated = 4;
941 buffer = xmalloc (buffer_allocated);
948 tlen = MIN (len, 4 - (memaddr & 3));
949 offset = memaddr & 3;
951 errcode = target_read_memory (memaddr & ~3, buf, sizeof buf);
954 /* The transfer request might have crossed the boundary to an
955 unallocated region of memory. Retry the transfer, requesting
959 errcode = target_read_memory (memaddr, buf, 1);
964 if (bufptr - buffer + tlen > buffer_allocated)
967 bytes = bufptr - buffer;
968 buffer_allocated *= 2;
969 buffer = xrealloc (buffer, buffer_allocated);
970 bufptr = buffer + bytes;
973 for (i = 0; i < tlen; i++)
975 *bufptr++ = buf[i + offset];
976 if (buf[i + offset] == '\000')
978 nbytes_read += i + 1;
994 /* Find a section containing ADDR. */
995 struct section_table *
996 target_section_by_addr (struct target_ops *target, CORE_ADDR addr)
998 struct section_table *secp;
999 for (secp = target->to_sections;
1000 secp < target->to_sections_end;
1003 if (addr >= secp->addr && addr < secp->endaddr)
1009 /* Perform a partial memory transfer. The arguments and return
1010 value are just as for target_xfer_partial. */
1013 memory_xfer_partial (struct target_ops *ops, void *readbuf, const void *writebuf,
1014 ULONGEST memaddr, LONGEST len)
1018 struct mem_region *region;
1020 /* Zero length requests are ok and require no work. */
1024 /* Try the executable file, if "trust-readonly-sections" is set. */
1025 if (readbuf != NULL && trust_readonly)
1027 struct section_table *secp;
1029 secp = target_section_by_addr (ops, memaddr);
1031 && (bfd_get_section_flags (secp->bfd, secp->the_bfd_section)
1033 return xfer_memory (memaddr, readbuf, len, 0, NULL, ops);
1036 /* Likewise for accesses to unmapped overlay sections. */
1037 if (readbuf != NULL && overlay_debugging)
1039 struct obj_section *section = find_pc_overlay (memaddr);
1040 if (pc_in_unmapped_range (memaddr, section))
1041 return xfer_memory (memaddr, readbuf, len, 0, NULL, ops);
1044 /* Try GDB's internal data cache. */
1045 region = lookup_mem_region (memaddr);
1046 /* region->hi == 0 means there's no upper bound. */
1047 if (memaddr + len < region->hi || region->hi == 0)
1050 reg_len = region->hi - memaddr;
1052 switch (region->attrib.mode)
1055 if (writebuf != NULL)
1060 if (readbuf != NULL)
1065 /* We only support writing to flash during "load" for now. */
1066 if (writebuf != NULL)
1067 error (_("Writing to flash memory forbidden in this context"));
1074 if (region->attrib.cache)
1076 /* FIXME drow/2006-08-09: This call discards OPS, so the raw
1077 memory request will start back at current_target. */
1078 if (readbuf != NULL)
1079 res = dcache_xfer_memory (target_dcache, memaddr, readbuf,
1082 /* FIXME drow/2006-08-09: If we're going to preserve const
1083 correctness dcache_xfer_memory should take readbuf and
1085 res = dcache_xfer_memory (target_dcache, memaddr,
1092 if (readbuf && !show_memory_breakpoints)
1093 breakpoint_restore_shadows (readbuf, memaddr, reg_len);
1098 /* If none of those methods found the memory we wanted, fall back
1099 to a target partial transfer. Normally a single call to
1100 to_xfer_partial is enough; if it doesn't recognize an object
1101 it will call the to_xfer_partial of the next target down.
1102 But for memory this won't do. Memory is the only target
1103 object which can be read from more than one valid target.
1104 A core file, for instance, could have some of memory but
1105 delegate other bits to the target below it. So, we must
1106 manually try all targets. */
1110 res = ops->to_xfer_partial (ops, TARGET_OBJECT_MEMORY, NULL,
1111 readbuf, writebuf, memaddr, reg_len);
1115 /* We want to continue past core files to executables, but not
1116 past a running target's memory. */
1117 if (ops->to_has_all_memory)
1122 while (ops != NULL);
1124 if (readbuf && !show_memory_breakpoints)
1125 breakpoint_restore_shadows (readbuf, memaddr, reg_len);
1127 /* If we still haven't got anything, return the last error. We
1133 restore_show_memory_breakpoints (void *arg)
1135 show_memory_breakpoints = (uintptr_t) arg;
1139 make_show_memory_breakpoints_cleanup (int show)
1141 int current = show_memory_breakpoints;
1142 show_memory_breakpoints = show;
1144 return make_cleanup (restore_show_memory_breakpoints,
1145 (void *) (uintptr_t) current);
1149 target_xfer_partial (struct target_ops *ops,
1150 enum target_object object, const char *annex,
1151 void *readbuf, const void *writebuf,
1152 ULONGEST offset, LONGEST len)
1156 gdb_assert (ops->to_xfer_partial != NULL);
1158 /* If this is a memory transfer, let the memory-specific code
1159 have a look at it instead. Memory transfers are more
1161 if (object == TARGET_OBJECT_MEMORY)
1162 retval = memory_xfer_partial (ops, readbuf, writebuf, offset, len);
1165 enum target_object raw_object = object;
1167 /* If this is a raw memory transfer, request the normal
1168 memory object from other layers. */
1169 if (raw_object == TARGET_OBJECT_RAW_MEMORY)
1170 raw_object = TARGET_OBJECT_MEMORY;
1172 retval = ops->to_xfer_partial (ops, raw_object, annex, readbuf,
1173 writebuf, offset, len);
1178 const unsigned char *myaddr = NULL;
1180 fprintf_unfiltered (gdb_stdlog,
1181 "%s:target_xfer_partial (%d, %s, %s, %s, %s, %s) = %s",
1184 (annex ? annex : "(null)"),
1185 host_address_to_string (readbuf),
1186 host_address_to_string (writebuf),
1187 core_addr_to_string_nz (offset),
1188 plongest (len), plongest (retval));
1194 if (retval > 0 && myaddr != NULL)
1198 fputs_unfiltered (", bytes =", gdb_stdlog);
1199 for (i = 0; i < retval; i++)
1201 if ((((intptr_t) &(myaddr[i])) & 0xf) == 0)
1203 if (targetdebug < 2 && i > 0)
1205 fprintf_unfiltered (gdb_stdlog, " ...");
1208 fprintf_unfiltered (gdb_stdlog, "\n");
1211 fprintf_unfiltered (gdb_stdlog, " %02x", myaddr[i] & 0xff);
1215 fputc_unfiltered ('\n', gdb_stdlog);
1220 /* Read LEN bytes of target memory at address MEMADDR, placing the results in
1221 GDB's memory at MYADDR. Returns either 0 for success or an errno value
1222 if any error occurs.
1224 If an error occurs, no guarantee is made about the contents of the data at
1225 MYADDR. In particular, the caller should not depend upon partial reads
1226 filling the buffer with good data. There is no way for the caller to know
1227 how much good data might have been transfered anyway. Callers that can
1228 deal with partial reads should call target_read (which will retry until
1229 it makes no progress, and then return how much was transferred). */
1232 target_read_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len)
1234 if (target_read (¤t_target, TARGET_OBJECT_MEMORY, NULL,
1235 myaddr, memaddr, len) == len)
1242 target_write_memory (CORE_ADDR memaddr, const gdb_byte *myaddr, int len)
1244 if (target_write (¤t_target, TARGET_OBJECT_MEMORY, NULL,
1245 myaddr, memaddr, len) == len)
1251 /* Fetch the target's memory map. */
1254 target_memory_map (void)
1256 VEC(mem_region_s) *result;
1257 struct mem_region *last_one, *this_one;
1259 struct target_ops *t;
1262 fprintf_unfiltered (gdb_stdlog, "target_memory_map ()\n");
1264 for (t = current_target.beneath; t != NULL; t = t->beneath)
1265 if (t->to_memory_map != NULL)
1271 result = t->to_memory_map (t);
1275 qsort (VEC_address (mem_region_s, result),
1276 VEC_length (mem_region_s, result),
1277 sizeof (struct mem_region), mem_region_cmp);
1279 /* Check that regions do not overlap. Simultaneously assign
1280 a numbering for the "mem" commands to use to refer to
1283 for (ix = 0; VEC_iterate (mem_region_s, result, ix, this_one); ix++)
1285 this_one->number = ix;
1287 if (last_one && last_one->hi > this_one->lo)
1289 warning (_("Overlapping regions in memory map: ignoring"));
1290 VEC_free (mem_region_s, result);
1293 last_one = this_one;
1300 target_flash_erase (ULONGEST address, LONGEST length)
1302 struct target_ops *t;
1304 for (t = current_target.beneath; t != NULL; t = t->beneath)
1305 if (t->to_flash_erase != NULL)
1308 fprintf_unfiltered (gdb_stdlog, "target_flash_erase (%s, %s)\n",
1309 paddr (address), phex (length, 0));
1310 t->to_flash_erase (t, address, length);
1318 target_flash_done (void)
1320 struct target_ops *t;
1322 for (t = current_target.beneath; t != NULL; t = t->beneath)
1323 if (t->to_flash_done != NULL)
1326 fprintf_unfiltered (gdb_stdlog, "target_flash_done\n");
1327 t->to_flash_done (t);
1335 show_trust_readonly (struct ui_file *file, int from_tty,
1336 struct cmd_list_element *c, const char *value)
1338 fprintf_filtered (file, _("\
1339 Mode for reading from readonly sections is %s.\n"),
1343 /* More generic transfers. */
1346 default_xfer_partial (struct target_ops *ops, enum target_object object,
1347 const char *annex, gdb_byte *readbuf,
1348 const gdb_byte *writebuf, ULONGEST offset, LONGEST len)
1350 if (object == TARGET_OBJECT_MEMORY
1351 && ops->deprecated_xfer_memory != NULL)
1352 /* If available, fall back to the target's
1353 "deprecated_xfer_memory" method. */
1357 if (writebuf != NULL)
1359 void *buffer = xmalloc (len);
1360 struct cleanup *cleanup = make_cleanup (xfree, buffer);
1361 memcpy (buffer, writebuf, len);
1362 xfered = ops->deprecated_xfer_memory (offset, buffer, len,
1363 1/*write*/, NULL, ops);
1364 do_cleanups (cleanup);
1366 if (readbuf != NULL)
1367 xfered = ops->deprecated_xfer_memory (offset, readbuf, len,
1368 0/*read*/, NULL, ops);
1371 else if (xfered == 0 && errno == 0)
1372 /* "deprecated_xfer_memory" uses 0, cross checked against
1373 ERRNO as one indication of an error. */
1378 else if (ops->beneath != NULL)
1379 return ops->beneath->to_xfer_partial (ops->beneath, object, annex,
1380 readbuf, writebuf, offset, len);
1385 /* The xfer_partial handler for the topmost target. Unlike the default,
1386 it does not need to handle memory specially; it just passes all
1387 requests down the stack. */
1390 current_xfer_partial (struct target_ops *ops, enum target_object object,
1391 const char *annex, gdb_byte *readbuf,
1392 const gdb_byte *writebuf, ULONGEST offset, LONGEST len)
1394 if (ops->beneath != NULL)
1395 return ops->beneath->to_xfer_partial (ops->beneath, object, annex,
1396 readbuf, writebuf, offset, len);
1401 /* Target vector read/write partial wrapper functions.
1403 NOTE: cagney/2003-10-21: I wonder if having "to_xfer_partial
1404 (inbuf, outbuf)", instead of separate read/write methods, make life
1408 target_read_partial (struct target_ops *ops,
1409 enum target_object object,
1410 const char *annex, gdb_byte *buf,
1411 ULONGEST offset, LONGEST len)
1413 return target_xfer_partial (ops, object, annex, buf, NULL, offset, len);
1417 target_write_partial (struct target_ops *ops,
1418 enum target_object object,
1419 const char *annex, const gdb_byte *buf,
1420 ULONGEST offset, LONGEST len)
1422 return target_xfer_partial (ops, object, annex, NULL, buf, offset, len);
1425 /* Wrappers to perform the full transfer. */
1427 target_read (struct target_ops *ops,
1428 enum target_object object,
1429 const char *annex, gdb_byte *buf,
1430 ULONGEST offset, LONGEST len)
1433 while (xfered < len)
1435 LONGEST xfer = target_read_partial (ops, object, annex,
1436 (gdb_byte *) buf + xfered,
1437 offset + xfered, len - xfered);
1438 /* Call an observer, notifying them of the xfer progress? */
1450 target_read_until_error (struct target_ops *ops,
1451 enum target_object object,
1452 const char *annex, gdb_byte *buf,
1453 ULONGEST offset, LONGEST len)
1456 while (xfered < len)
1458 LONGEST xfer = target_read_partial (ops, object, annex,
1459 (gdb_byte *) buf + xfered,
1460 offset + xfered, len - xfered);
1461 /* Call an observer, notifying them of the xfer progress? */
1466 /* We've got an error. Try to read in smaller blocks. */
1467 ULONGEST start = offset + xfered;
1468 ULONGEST remaining = len - xfered;
1471 /* If an attempt was made to read a random memory address,
1472 it's likely that the very first byte is not accessible.
1473 Try reading the first byte, to avoid doing log N tries
1475 xfer = target_read_partial (ops, object, annex,
1476 (gdb_byte *) buf + xfered, start, 1);
1485 xfer = target_read_partial (ops, object, annex,
1486 (gdb_byte *) buf + xfered,
1496 /* We have successfully read the first half. So, the
1497 error must be in the second half. Adjust start and
1498 remaining to point at the second half. */
1515 /* An alternative to target_write with progress callbacks. */
1518 target_write_with_progress (struct target_ops *ops,
1519 enum target_object object,
1520 const char *annex, const gdb_byte *buf,
1521 ULONGEST offset, LONGEST len,
1522 void (*progress) (ULONGEST, void *), void *baton)
1526 /* Give the progress callback a chance to set up. */
1528 (*progress) (0, baton);
1530 while (xfered < len)
1532 LONGEST xfer = target_write_partial (ops, object, annex,
1533 (gdb_byte *) buf + xfered,
1534 offset + xfered, len - xfered);
1542 (*progress) (xfer, baton);
1551 target_write (struct target_ops *ops,
1552 enum target_object object,
1553 const char *annex, const gdb_byte *buf,
1554 ULONGEST offset, LONGEST len)
1556 return target_write_with_progress (ops, object, annex, buf, offset, len,
1560 /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return
1561 the size of the transferred data. PADDING additional bytes are
1562 available in *BUF_P. This is a helper function for
1563 target_read_alloc; see the declaration of that function for more
1567 target_read_alloc_1 (struct target_ops *ops, enum target_object object,
1568 const char *annex, gdb_byte **buf_p, int padding)
1570 size_t buf_alloc, buf_pos;
1574 /* This function does not have a length parameter; it reads the
1575 entire OBJECT). Also, it doesn't support objects fetched partly
1576 from one target and partly from another (in a different stratum,
1577 e.g. a core file and an executable). Both reasons make it
1578 unsuitable for reading memory. */
1579 gdb_assert (object != TARGET_OBJECT_MEMORY);
1581 /* Start by reading up to 4K at a time. The target will throttle
1582 this number down if necessary. */
1584 buf = xmalloc (buf_alloc);
1588 n = target_read_partial (ops, object, annex, &buf[buf_pos],
1589 buf_pos, buf_alloc - buf_pos - padding);
1592 /* An error occurred. */
1598 /* Read all there was. */
1608 /* If the buffer is filling up, expand it. */
1609 if (buf_alloc < buf_pos * 2)
1612 buf = xrealloc (buf, buf_alloc);
1619 /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return
1620 the size of the transferred data. See the declaration in "target.h"
1621 function for more information about the return value. */
1624 target_read_alloc (struct target_ops *ops, enum target_object object,
1625 const char *annex, gdb_byte **buf_p)
1627 return target_read_alloc_1 (ops, object, annex, buf_p, 0);
1630 /* Read OBJECT/ANNEX using OPS. The result is NUL-terminated and
1631 returned as a string, allocated using xmalloc. If an error occurs
1632 or the transfer is unsupported, NULL is returned. Empty objects
1633 are returned as allocated but empty strings. A warning is issued
1634 if the result contains any embedded NUL bytes. */
1637 target_read_stralloc (struct target_ops *ops, enum target_object object,
1641 LONGEST transferred;
1643 transferred = target_read_alloc_1 (ops, object, annex, &buffer, 1);
1645 if (transferred < 0)
1648 if (transferred == 0)
1649 return xstrdup ("");
1651 buffer[transferred] = 0;
1652 if (strlen (buffer) < transferred)
1653 warning (_("target object %d, annex %s, "
1654 "contained unexpected null characters"),
1655 (int) object, annex ? annex : "(none)");
1657 return (char *) buffer;
1660 /* Memory transfer methods. */
1663 get_target_memory (struct target_ops *ops, CORE_ADDR addr, gdb_byte *buf,
1666 if (target_read (ops, TARGET_OBJECT_MEMORY, NULL, buf, addr, len)
1668 memory_error (EIO, addr);
1672 get_target_memory_unsigned (struct target_ops *ops,
1673 CORE_ADDR addr, int len)
1675 gdb_byte buf[sizeof (ULONGEST)];
1677 gdb_assert (len <= sizeof (buf));
1678 get_target_memory (ops, addr, buf, len);
1679 return extract_unsigned_integer (buf, len);
1683 target_info (char *args, int from_tty)
1685 struct target_ops *t;
1686 int has_all_mem = 0;
1688 if (symfile_objfile != NULL)
1689 printf_unfiltered (_("Symbols from \"%s\".\n"), symfile_objfile->name);
1691 for (t = target_stack; t != NULL; t = t->beneath)
1693 if (!t->to_has_memory)
1696 if ((int) (t->to_stratum) <= (int) dummy_stratum)
1699 printf_unfiltered (_("\tWhile running this, GDB does not access memory from...\n"));
1700 printf_unfiltered ("%s:\n", t->to_longname);
1701 (t->to_files_info) (t);
1702 has_all_mem = t->to_has_all_memory;
1706 /* This function is called before any new inferior is created, e.g.
1707 by running a program, attaching, or connecting to a target.
1708 It cleans up any state from previous invocations which might
1709 change between runs. This is a subset of what target_preopen
1710 resets (things which might change between targets). */
1713 target_pre_inferior (int from_tty)
1715 /* Clear out solib state. Otherwise the solib state of the previous
1716 inferior might have survived and is entirely wrong for the new
1717 target. This has been observed on GNU/Linux using glibc 2.3. How
1729 Cannot access memory at address 0xdeadbeef
1732 /* In some OSs, the shared library list is the same/global/shared
1733 across inferiors. If code is shared between processes, so are
1734 memory regions and features. */
1735 if (!gdbarch_has_global_solist (target_gdbarch))
1737 no_shared_libraries (NULL, from_tty);
1739 invalidate_target_mem_regions ();
1741 target_clear_description ();
1745 /* This is to be called by the open routine before it does
1749 target_preopen (int from_tty)
1753 if (target_has_execution)
1756 || query (_("A program is being debugged already. Kill it? ")))
1759 error (_("Program not killed."));
1762 /* Calling target_kill may remove the target from the stack. But if
1763 it doesn't (which seems like a win for UDI), remove it now. */
1764 /* Leave the exec target, though. The user may be switching from a
1765 live process to a core of the same program. */
1766 pop_all_targets_above (file_stratum, 0);
1768 target_pre_inferior (from_tty);
1771 /* Detach a target after doing deferred register stores. */
1774 target_detach (char *args, int from_tty)
1776 struct target_ops* t;
1778 if (gdbarch_has_global_solist (target_gdbarch))
1779 /* Don't remove global breakpoints here. They're removed on
1780 disconnection from the target. */
1783 /* If we're in breakpoints-always-inserted mode, have to remove
1784 them before detaching. */
1785 remove_breakpoints ();
1787 for (t = current_target.beneath; t != NULL; t = t->beneath)
1789 if (t->to_detach != NULL)
1791 t->to_detach (t, args, from_tty);
1793 fprintf_unfiltered (gdb_stdlog, "target_detach (%s, %d)\n",
1799 internal_error (__FILE__, __LINE__, "could not find a target to detach");
1803 target_disconnect (char *args, int from_tty)
1805 struct target_ops *t;
1807 /* If we're in breakpoints-always-inserted mode or if breakpoints
1808 are global across processes, we have to remove them before
1810 remove_breakpoints ();
1812 for (t = current_target.beneath; t != NULL; t = t->beneath)
1813 if (t->to_disconnect != NULL)
1816 fprintf_unfiltered (gdb_stdlog, "target_disconnect (%s, %d)\n",
1818 t->to_disconnect (t, args, from_tty);
1826 target_wait (ptid_t ptid, struct target_waitstatus *status)
1828 struct target_ops *t;
1830 for (t = current_target.beneath; t != NULL; t = t->beneath)
1832 if (t->to_wait != NULL)
1834 ptid_t retval = (*t->to_wait) (t, ptid, status);
1838 char *status_string;
1840 status_string = target_waitstatus_to_string (status);
1841 fprintf_unfiltered (gdb_stdlog,
1842 "target_wait (%d, status) = %d, %s\n",
1843 PIDGET (ptid), PIDGET (retval),
1845 xfree (status_string);
1856 target_pid_to_str (ptid_t ptid)
1858 struct target_ops *t;
1860 for (t = current_target.beneath; t != NULL; t = t->beneath)
1862 if (t->to_pid_to_str != NULL)
1863 return (*t->to_pid_to_str) (t, ptid);
1866 return normal_pid_to_str (ptid);
1870 target_resume (ptid_t ptid, int step, enum target_signal signal)
1872 struct target_ops *t;
1874 dcache_invalidate (target_dcache);
1876 for (t = current_target.beneath; t != NULL; t = t->beneath)
1878 if (t->to_resume != NULL)
1880 t->to_resume (t, ptid, step, signal);
1882 fprintf_unfiltered (gdb_stdlog, "target_resume (%d, %s, %s)\n",
1884 step ? "step" : "continue",
1885 target_signal_to_name (signal));
1887 set_executing (ptid, 1);
1888 set_running (ptid, 1);
1895 /* Look through the list of possible targets for a target that can
1899 target_follow_fork (int follow_child)
1901 struct target_ops *t;
1903 for (t = current_target.beneath; t != NULL; t = t->beneath)
1905 if (t->to_follow_fork != NULL)
1907 int retval = t->to_follow_fork (t, follow_child);
1909 fprintf_unfiltered (gdb_stdlog, "target_follow_fork (%d) = %d\n",
1910 follow_child, retval);
1915 /* Some target returned a fork event, but did not know how to follow it. */
1916 internal_error (__FILE__, __LINE__,
1917 "could not find a target to follow fork");
1921 target_mourn_inferior (void)
1923 struct target_ops *t;
1924 for (t = current_target.beneath; t != NULL; t = t->beneath)
1926 if (t->to_mourn_inferior != NULL)
1928 t->to_mourn_inferior (t);
1930 fprintf_unfiltered (gdb_stdlog, "target_mourn_inferior ()\n");
1935 internal_error (__FILE__, __LINE__,
1936 "could not find a target to follow mourn inferiour");
1939 /* Look for a target which can describe architectural features, starting
1940 from TARGET. If we find one, return its description. */
1942 const struct target_desc *
1943 target_read_description (struct target_ops *target)
1945 struct target_ops *t;
1947 for (t = target; t != NULL; t = t->beneath)
1948 if (t->to_read_description != NULL)
1950 const struct target_desc *tdesc;
1952 tdesc = t->to_read_description (t);
1960 /* The default implementation of to_search_memory.
1961 This implements a basic search of memory, reading target memory and
1962 performing the search here (as opposed to performing the search in on the
1963 target side with, for example, gdbserver). */
1966 simple_search_memory (struct target_ops *ops,
1967 CORE_ADDR start_addr, ULONGEST search_space_len,
1968 const gdb_byte *pattern, ULONGEST pattern_len,
1969 CORE_ADDR *found_addrp)
1971 /* NOTE: also defined in find.c testcase. */
1972 #define SEARCH_CHUNK_SIZE 16000
1973 const unsigned chunk_size = SEARCH_CHUNK_SIZE;
1974 /* Buffer to hold memory contents for searching. */
1975 gdb_byte *search_buf;
1976 unsigned search_buf_size;
1977 struct cleanup *old_cleanups;
1979 search_buf_size = chunk_size + pattern_len - 1;
1981 /* No point in trying to allocate a buffer larger than the search space. */
1982 if (search_space_len < search_buf_size)
1983 search_buf_size = search_space_len;
1985 search_buf = malloc (search_buf_size);
1986 if (search_buf == NULL)
1987 error (_("Unable to allocate memory to perform the search."));
1988 old_cleanups = make_cleanup (free_current_contents, &search_buf);
1990 /* Prime the search buffer. */
1992 if (target_read (ops, TARGET_OBJECT_MEMORY, NULL,
1993 search_buf, start_addr, search_buf_size) != search_buf_size)
1995 warning (_("Unable to access target memory at %s, halting search."),
1996 hex_string (start_addr));
1997 do_cleanups (old_cleanups);
2001 /* Perform the search.
2003 The loop is kept simple by allocating [N + pattern-length - 1] bytes.
2004 When we've scanned N bytes we copy the trailing bytes to the start and
2005 read in another N bytes. */
2007 while (search_space_len >= pattern_len)
2009 gdb_byte *found_ptr;
2010 unsigned nr_search_bytes = min (search_space_len, search_buf_size);
2012 found_ptr = memmem (search_buf, nr_search_bytes,
2013 pattern, pattern_len);
2015 if (found_ptr != NULL)
2017 CORE_ADDR found_addr = start_addr + (found_ptr - search_buf);
2018 *found_addrp = found_addr;
2019 do_cleanups (old_cleanups);
2023 /* Not found in this chunk, skip to next chunk. */
2025 /* Don't let search_space_len wrap here, it's unsigned. */
2026 if (search_space_len >= chunk_size)
2027 search_space_len -= chunk_size;
2029 search_space_len = 0;
2031 if (search_space_len >= pattern_len)
2033 unsigned keep_len = search_buf_size - chunk_size;
2034 CORE_ADDR read_addr = start_addr + keep_len;
2037 /* Copy the trailing part of the previous iteration to the front
2038 of the buffer for the next iteration. */
2039 gdb_assert (keep_len == pattern_len - 1);
2040 memcpy (search_buf, search_buf + chunk_size, keep_len);
2042 nr_to_read = min (search_space_len - keep_len, chunk_size);
2044 if (target_read (ops, TARGET_OBJECT_MEMORY, NULL,
2045 search_buf + keep_len, read_addr,
2046 nr_to_read) != nr_to_read)
2048 warning (_("Unable to access target memory at %s, halting search."),
2049 hex_string (read_addr));
2050 do_cleanups (old_cleanups);
2054 start_addr += chunk_size;
2060 do_cleanups (old_cleanups);
2064 /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the
2065 sequence of bytes in PATTERN with length PATTERN_LEN.
2067 The result is 1 if found, 0 if not found, and -1 if there was an error
2068 requiring halting of the search (e.g. memory read error).
2069 If the pattern is found the address is recorded in FOUND_ADDRP. */
2072 target_search_memory (CORE_ADDR start_addr, ULONGEST search_space_len,
2073 const gdb_byte *pattern, ULONGEST pattern_len,
2074 CORE_ADDR *found_addrp)
2076 struct target_ops *t;
2079 /* We don't use INHERIT to set current_target.to_search_memory,
2080 so we have to scan the target stack and handle targetdebug
2084 fprintf_unfiltered (gdb_stdlog, "target_search_memory (%s, ...)\n",
2085 hex_string (start_addr));
2087 for (t = current_target.beneath; t != NULL; t = t->beneath)
2088 if (t->to_search_memory != NULL)
2093 found = t->to_search_memory (t, start_addr, search_space_len,
2094 pattern, pattern_len, found_addrp);
2098 /* If a special version of to_search_memory isn't available, use the
2100 found = simple_search_memory (¤t_target,
2101 start_addr, search_space_len,
2102 pattern, pattern_len, found_addrp);
2106 fprintf_unfiltered (gdb_stdlog, " = %d\n", found);
2111 /* Look through the currently pushed targets. If none of them will
2112 be able to restart the currently running process, issue an error
2116 target_require_runnable (void)
2118 struct target_ops *t;
2120 for (t = target_stack; t != NULL; t = t->beneath)
2122 /* If this target knows how to create a new program, then
2123 assume we will still be able to after killing the current
2124 one. Either killing and mourning will not pop T, or else
2125 find_default_run_target will find it again. */
2126 if (t->to_create_inferior != NULL)
2129 /* Do not worry about thread_stratum targets that can not
2130 create inferiors. Assume they will be pushed again if
2131 necessary, and continue to the process_stratum. */
2132 if (t->to_stratum == thread_stratum)
2136 The \"%s\" target does not support \"run\". Try \"help target\" or \"continue\"."),
2140 /* This function is only called if the target is running. In that
2141 case there should have been a process_stratum target and it
2142 should either know how to create inferiors, or not... */
2143 internal_error (__FILE__, __LINE__, "No targets found");
2146 /* Look through the list of possible targets for a target that can
2147 execute a run or attach command without any other data. This is
2148 used to locate the default process stratum.
2150 If DO_MESG is not NULL, the result is always valid (error() is
2151 called for errors); else, return NULL on error. */
2153 static struct target_ops *
2154 find_default_run_target (char *do_mesg)
2156 struct target_ops **t;
2157 struct target_ops *runable = NULL;
2162 for (t = target_structs; t < target_structs + target_struct_size;
2165 if ((*t)->to_can_run && target_can_run (*t))
2175 error (_("Don't know how to %s. Try \"help target\"."), do_mesg);
2184 find_default_attach (struct target_ops *ops, char *args, int from_tty)
2186 struct target_ops *t;
2188 t = find_default_run_target ("attach");
2189 (t->to_attach) (t, args, from_tty);
2194 find_default_create_inferior (struct target_ops *ops,
2195 char *exec_file, char *allargs, char **env,
2198 struct target_ops *t;
2200 t = find_default_run_target ("run");
2201 (t->to_create_inferior) (t, exec_file, allargs, env, from_tty);
2206 find_default_can_async_p (void)
2208 struct target_ops *t;
2210 /* This may be called before the target is pushed on the stack;
2211 look for the default process stratum. If there's none, gdb isn't
2212 configured with a native debugger, and target remote isn't
2214 t = find_default_run_target (NULL);
2215 if (t && t->to_can_async_p)
2216 return (t->to_can_async_p) ();
2221 find_default_is_async_p (void)
2223 struct target_ops *t;
2225 /* This may be called before the target is pushed on the stack;
2226 look for the default process stratum. If there's none, gdb isn't
2227 configured with a native debugger, and target remote isn't
2229 t = find_default_run_target (NULL);
2230 if (t && t->to_is_async_p)
2231 return (t->to_is_async_p) ();
2236 find_default_supports_non_stop (void)
2238 struct target_ops *t;
2240 t = find_default_run_target (NULL);
2241 if (t && t->to_supports_non_stop)
2242 return (t->to_supports_non_stop) ();
2247 target_supports_non_stop (void)
2249 struct target_ops *t;
2250 for (t = ¤t_target; t != NULL; t = t->beneath)
2251 if (t->to_supports_non_stop)
2252 return t->to_supports_non_stop ();
2259 target_get_osdata (const char *type)
2262 struct target_ops *t;
2264 /* If we're already connected to something that can get us OS
2265 related data, use it. Otherwise, try using the native
2267 if (current_target.to_stratum >= process_stratum)
2268 t = current_target.beneath;
2270 t = find_default_run_target ("get OS data");
2275 return target_read_stralloc (t, TARGET_OBJECT_OSDATA, type);
2279 default_region_ok_for_hw_watchpoint (CORE_ADDR addr, int len)
2281 return (len <= gdbarch_ptr_bit (target_gdbarch) / TARGET_CHAR_BIT);
2285 default_watchpoint_addr_within_range (struct target_ops *target,
2287 CORE_ADDR start, int length)
2289 return addr >= start && addr < start + length;
2305 return_minus_one (void)
2311 * Resize the to_sections pointer. Also make sure that anyone that
2312 * was holding on to an old value of it gets updated.
2313 * Returns the old size.
2317 target_resize_to_sections (struct target_ops *target, int num_added)
2319 struct target_ops **t;
2320 struct section_table *old_value;
2323 old_value = target->to_sections;
2325 if (target->to_sections)
2327 old_count = target->to_sections_end - target->to_sections;
2328 target->to_sections = (struct section_table *)
2329 xrealloc ((char *) target->to_sections,
2330 (sizeof (struct section_table)) * (num_added + old_count));
2335 target->to_sections = (struct section_table *)
2336 xmalloc ((sizeof (struct section_table)) * num_added);
2338 target->to_sections_end = target->to_sections + (num_added + old_count);
2340 /* Check to see if anyone else was pointing to this structure.
2341 If old_value was null, then no one was. */
2345 for (t = target_structs; t < target_structs + target_struct_size;
2348 if ((*t)->to_sections == old_value)
2350 (*t)->to_sections = target->to_sections;
2351 (*t)->to_sections_end = target->to_sections_end;
2354 /* There is a flattened view of the target stack in current_target,
2355 so its to_sections pointer might also need updating. */
2356 if (current_target.to_sections == old_value)
2358 current_target.to_sections = target->to_sections;
2359 current_target.to_sections_end = target->to_sections_end;
2367 /* Remove all target sections taken from ABFD.
2369 Scan the current target stack for targets whose section tables
2370 refer to sections from BFD, and remove those sections. We use this
2371 when we notice that the inferior has unloaded a shared object, for
2374 remove_target_sections (bfd *abfd)
2376 struct target_ops **t;
2378 for (t = target_structs; t < target_structs + target_struct_size; t++)
2380 struct section_table *src, *dest;
2382 dest = (*t)->to_sections;
2383 for (src = (*t)->to_sections; src < (*t)->to_sections_end; src++)
2384 if (src->bfd != abfd)
2386 /* Keep this section. */
2387 if (dest < src) *dest = *src;
2391 /* If we've dropped any sections, resize the section table. */
2393 target_resize_to_sections (*t, dest - src);
2400 /* Find a single runnable target in the stack and return it. If for
2401 some reason there is more than one, return NULL. */
2404 find_run_target (void)
2406 struct target_ops **t;
2407 struct target_ops *runable = NULL;
2412 for (t = target_structs; t < target_structs + target_struct_size; ++t)
2414 if ((*t)->to_can_run && target_can_run (*t))
2421 return (count == 1 ? runable : NULL);
2424 /* Find a single core_stratum target in the list of targets and return it.
2425 If for some reason there is more than one, return NULL. */
2428 find_core_target (void)
2430 struct target_ops **t;
2431 struct target_ops *runable = NULL;
2436 for (t = target_structs; t < target_structs + target_struct_size;
2439 if ((*t)->to_stratum == core_stratum)
2446 return (count == 1 ? runable : NULL);
2450 * Find the next target down the stack from the specified target.
2454 find_target_beneath (struct target_ops *t)
2460 /* The inferior process has died. Long live the inferior! */
2463 generic_mourn_inferior (void)
2467 ptid = inferior_ptid;
2468 inferior_ptid = null_ptid;
2470 if (!ptid_equal (ptid, null_ptid))
2472 int pid = ptid_get_pid (ptid);
2473 delete_inferior (pid);
2476 breakpoint_init_inferior (inf_exited);
2477 registers_changed ();
2479 reopen_exec_file ();
2480 reinit_frame_cache ();
2482 if (deprecated_detach_hook)
2483 deprecated_detach_hook ();
2486 /* Helper function for child_wait and the derivatives of child_wait.
2487 HOSTSTATUS is the waitstatus from wait() or the equivalent; store our
2488 translation of that in OURSTATUS. */
2490 store_waitstatus (struct target_waitstatus *ourstatus, int hoststatus)
2492 if (WIFEXITED (hoststatus))
2494 ourstatus->kind = TARGET_WAITKIND_EXITED;
2495 ourstatus->value.integer = WEXITSTATUS (hoststatus);
2497 else if (!WIFSTOPPED (hoststatus))
2499 ourstatus->kind = TARGET_WAITKIND_SIGNALLED;
2500 ourstatus->value.sig = target_signal_from_host (WTERMSIG (hoststatus));
2504 ourstatus->kind = TARGET_WAITKIND_STOPPED;
2505 ourstatus->value.sig = target_signal_from_host (WSTOPSIG (hoststatus));
2509 /* Convert a normal process ID to a string. Returns the string in a
2513 normal_pid_to_str (ptid_t ptid)
2515 static char buf[32];
2517 xsnprintf (buf, sizeof buf, "process %d", ptid_get_pid (ptid));
2522 dummy_pid_to_str (struct target_ops *ops, ptid_t ptid)
2524 return normal_pid_to_str (ptid);
2527 /* Error-catcher for target_find_memory_regions */
2528 static int dummy_find_memory_regions (int (*ignore1) (), void *ignore2)
2530 error (_("No target."));
2534 /* Error-catcher for target_make_corefile_notes */
2535 static char * dummy_make_corefile_notes (bfd *ignore1, int *ignore2)
2537 error (_("No target."));
2541 /* Set up the handful of non-empty slots needed by the dummy target
2545 init_dummy_target (void)
2547 dummy_target.to_shortname = "None";
2548 dummy_target.to_longname = "None";
2549 dummy_target.to_doc = "";
2550 dummy_target.to_attach = find_default_attach;
2551 dummy_target.to_detach =
2552 (void (*)(struct target_ops *, char *, int))target_ignore;
2553 dummy_target.to_create_inferior = find_default_create_inferior;
2554 dummy_target.to_can_async_p = find_default_can_async_p;
2555 dummy_target.to_is_async_p = find_default_is_async_p;
2556 dummy_target.to_supports_non_stop = find_default_supports_non_stop;
2557 dummy_target.to_pid_to_str = dummy_pid_to_str;
2558 dummy_target.to_stratum = dummy_stratum;
2559 dummy_target.to_find_memory_regions = dummy_find_memory_regions;
2560 dummy_target.to_make_corefile_notes = dummy_make_corefile_notes;
2561 dummy_target.to_xfer_partial = default_xfer_partial;
2562 dummy_target.to_magic = OPS_MAGIC;
2566 debug_to_open (char *args, int from_tty)
2568 debug_target.to_open (args, from_tty);
2570 fprintf_unfiltered (gdb_stdlog, "target_open (%s, %d)\n", args, from_tty);
2574 target_close (struct target_ops *targ, int quitting)
2576 if (targ->to_xclose != NULL)
2577 targ->to_xclose (targ, quitting);
2578 else if (targ->to_close != NULL)
2579 targ->to_close (quitting);
2582 fprintf_unfiltered (gdb_stdlog, "target_close (%d)\n", quitting);
2586 target_attach (char *args, int from_tty)
2588 struct target_ops *t;
2589 for (t = current_target.beneath; t != NULL; t = t->beneath)
2591 if (t->to_attach != NULL)
2593 t->to_attach (t, args, from_tty);
2595 fprintf_unfiltered (gdb_stdlog, "target_attach (%s, %d)\n",
2601 internal_error (__FILE__, __LINE__,
2602 "could not find a target to attach");
2606 target_thread_alive (ptid_t ptid)
2608 struct target_ops *t;
2609 for (t = current_target.beneath; t != NULL; t = t->beneath)
2611 if (t->to_thread_alive != NULL)
2615 retval = t->to_thread_alive (t, ptid);
2617 fprintf_unfiltered (gdb_stdlog, "target_thread_alive (%d) = %d\n",
2618 PIDGET (ptid), retval);
2628 target_find_new_threads (void)
2630 struct target_ops *t;
2631 for (t = current_target.beneath; t != NULL; t = t->beneath)
2633 if (t->to_find_new_threads != NULL)
2635 t->to_find_new_threads (t);
2637 fprintf_unfiltered (gdb_stdlog, "target_find_new_threads ()\n");
2645 debug_to_post_attach (int pid)
2647 debug_target.to_post_attach (pid);
2649 fprintf_unfiltered (gdb_stdlog, "target_post_attach (%d)\n", pid);
2652 /* Return a pretty printed form of target_waitstatus.
2653 Space for the result is malloc'd, caller must free. */
2656 target_waitstatus_to_string (const struct target_waitstatus *ws)
2658 const char *kind_str = "status->kind = ";
2662 case TARGET_WAITKIND_EXITED:
2663 return xstrprintf ("%sexited, status = %d",
2664 kind_str, ws->value.integer);
2665 case TARGET_WAITKIND_STOPPED:
2666 return xstrprintf ("%sstopped, signal = %s",
2667 kind_str, target_signal_to_name (ws->value.sig));
2668 case TARGET_WAITKIND_SIGNALLED:
2669 return xstrprintf ("%ssignalled, signal = %s",
2670 kind_str, target_signal_to_name (ws->value.sig));
2671 case TARGET_WAITKIND_LOADED:
2672 return xstrprintf ("%sloaded", kind_str);
2673 case TARGET_WAITKIND_FORKED:
2674 return xstrprintf ("%sforked", kind_str);
2675 case TARGET_WAITKIND_VFORKED:
2676 return xstrprintf ("%svforked", kind_str);
2677 case TARGET_WAITKIND_EXECD:
2678 return xstrprintf ("%sexecd", kind_str);
2679 case TARGET_WAITKIND_SYSCALL_ENTRY:
2680 return xstrprintf ("%ssyscall-entry", kind_str);
2681 case TARGET_WAITKIND_SYSCALL_RETURN:
2682 return xstrprintf ("%ssyscall-return", kind_str);
2683 case TARGET_WAITKIND_SPURIOUS:
2684 return xstrprintf ("%sspurious", kind_str);
2685 case TARGET_WAITKIND_IGNORE:
2686 return xstrprintf ("%signore", kind_str);
2687 case TARGET_WAITKIND_NO_HISTORY:
2688 return xstrprintf ("%sno-history", kind_str);
2690 return xstrprintf ("%sunknown???", kind_str);
2695 debug_print_register (const char * func,
2696 struct regcache *regcache, int regno)
2698 struct gdbarch *gdbarch = get_regcache_arch (regcache);
2699 fprintf_unfiltered (gdb_stdlog, "%s ", func);
2700 if (regno >= 0 && regno < gdbarch_num_regs (gdbarch)
2701 && gdbarch_register_name (gdbarch, regno) != NULL
2702 && gdbarch_register_name (gdbarch, regno)[0] != '\0')
2703 fprintf_unfiltered (gdb_stdlog, "(%s)",
2704 gdbarch_register_name (gdbarch, regno));
2706 fprintf_unfiltered (gdb_stdlog, "(%d)", regno);
2707 if (regno >= 0 && regno < gdbarch_num_regs (gdbarch))
2709 int i, size = register_size (gdbarch, regno);
2710 unsigned char buf[MAX_REGISTER_SIZE];
2711 regcache_raw_collect (regcache, regno, buf);
2712 fprintf_unfiltered (gdb_stdlog, " = ");
2713 for (i = 0; i < size; i++)
2715 fprintf_unfiltered (gdb_stdlog, "%02x", buf[i]);
2717 if (size <= sizeof (LONGEST))
2719 ULONGEST val = extract_unsigned_integer (buf, size);
2720 fprintf_unfiltered (gdb_stdlog, " %s %s",
2721 core_addr_to_string_nz (val), plongest (val));
2724 fprintf_unfiltered (gdb_stdlog, "\n");
2728 target_fetch_registers (struct regcache *regcache, int regno)
2730 struct target_ops *t;
2731 for (t = current_target.beneath; t != NULL; t = t->beneath)
2733 if (t->to_fetch_registers != NULL)
2735 t->to_fetch_registers (t, regcache, regno);
2737 debug_print_register ("target_fetch_registers", regcache, regno);
2744 target_store_registers (struct regcache *regcache, int regno)
2747 struct target_ops *t;
2748 for (t = current_target.beneath; t != NULL; t = t->beneath)
2750 if (t->to_store_registers != NULL)
2752 t->to_store_registers (t, regcache, regno);
2755 debug_print_register ("target_store_registers", regcache, regno);
2765 debug_to_prepare_to_store (struct regcache *regcache)
2767 debug_target.to_prepare_to_store (regcache);
2769 fprintf_unfiltered (gdb_stdlog, "target_prepare_to_store ()\n");
2773 deprecated_debug_xfer_memory (CORE_ADDR memaddr, bfd_byte *myaddr, int len,
2774 int write, struct mem_attrib *attrib,
2775 struct target_ops *target)
2779 retval = debug_target.deprecated_xfer_memory (memaddr, myaddr, len, write,
2782 fprintf_unfiltered (gdb_stdlog,
2783 "target_xfer_memory (%s, xxx, %d, %s, xxx) = %d",
2784 paddress (memaddr), len, write ? "write" : "read",
2791 fputs_unfiltered (", bytes =", gdb_stdlog);
2792 for (i = 0; i < retval; i++)
2794 if ((((intptr_t) &(myaddr[i])) & 0xf) == 0)
2796 if (targetdebug < 2 && i > 0)
2798 fprintf_unfiltered (gdb_stdlog, " ...");
2801 fprintf_unfiltered (gdb_stdlog, "\n");
2804 fprintf_unfiltered (gdb_stdlog, " %02x", myaddr[i] & 0xff);
2808 fputc_unfiltered ('\n', gdb_stdlog);
2814 debug_to_files_info (struct target_ops *target)
2816 debug_target.to_files_info (target);
2818 fprintf_unfiltered (gdb_stdlog, "target_files_info (xxx)\n");
2822 debug_to_insert_breakpoint (struct bp_target_info *bp_tgt)
2826 retval = debug_target.to_insert_breakpoint (bp_tgt);
2828 fprintf_unfiltered (gdb_stdlog,
2829 "target_insert_breakpoint (0x%lx, xxx) = %ld\n",
2830 (unsigned long) bp_tgt->placed_address,
2831 (unsigned long) retval);
2836 debug_to_remove_breakpoint (struct bp_target_info *bp_tgt)
2840 retval = debug_target.to_remove_breakpoint (bp_tgt);
2842 fprintf_unfiltered (gdb_stdlog,
2843 "target_remove_breakpoint (0x%lx, xxx) = %ld\n",
2844 (unsigned long) bp_tgt->placed_address,
2845 (unsigned long) retval);
2850 debug_to_can_use_hw_breakpoint (int type, int cnt, int from_tty)
2854 retval = debug_target.to_can_use_hw_breakpoint (type, cnt, from_tty);
2856 fprintf_unfiltered (gdb_stdlog,
2857 "target_can_use_hw_breakpoint (%ld, %ld, %ld) = %ld\n",
2858 (unsigned long) type,
2859 (unsigned long) cnt,
2860 (unsigned long) from_tty,
2861 (unsigned long) retval);
2866 debug_to_region_ok_for_hw_watchpoint (CORE_ADDR addr, int len)
2870 retval = debug_target.to_region_ok_for_hw_watchpoint (addr, len);
2872 fprintf_unfiltered (gdb_stdlog,
2873 "TARGET_REGION_OK_FOR_HW_WATCHPOINT (%ld, %ld) = 0x%lx\n",
2874 (unsigned long) addr,
2875 (unsigned long) len,
2876 (unsigned long) retval);
2881 debug_to_stopped_by_watchpoint (void)
2885 retval = debug_target.to_stopped_by_watchpoint ();
2887 fprintf_unfiltered (gdb_stdlog,
2888 "STOPPED_BY_WATCHPOINT () = %ld\n",
2889 (unsigned long) retval);
2894 debug_to_stopped_data_address (struct target_ops *target, CORE_ADDR *addr)
2898 retval = debug_target.to_stopped_data_address (target, addr);
2900 fprintf_unfiltered (gdb_stdlog,
2901 "target_stopped_data_address ([0x%lx]) = %ld\n",
2902 (unsigned long)*addr,
2903 (unsigned long)retval);
2908 debug_to_watchpoint_addr_within_range (struct target_ops *target,
2910 CORE_ADDR start, int length)
2914 retval = debug_target.to_watchpoint_addr_within_range (target, addr,
2917 fprintf_filtered (gdb_stdlog,
2918 "target_watchpoint_addr_within_range (0x%lx, 0x%lx, %d) = %d\n",
2919 (unsigned long) addr, (unsigned long) start, length,
2925 debug_to_insert_hw_breakpoint (struct bp_target_info *bp_tgt)
2929 retval = debug_target.to_insert_hw_breakpoint (bp_tgt);
2931 fprintf_unfiltered (gdb_stdlog,
2932 "target_insert_hw_breakpoint (0x%lx, xxx) = %ld\n",
2933 (unsigned long) bp_tgt->placed_address,
2934 (unsigned long) retval);
2939 debug_to_remove_hw_breakpoint (struct bp_target_info *bp_tgt)
2943 retval = debug_target.to_remove_hw_breakpoint (bp_tgt);
2945 fprintf_unfiltered (gdb_stdlog,
2946 "target_remove_hw_breakpoint (0x%lx, xxx) = %ld\n",
2947 (unsigned long) bp_tgt->placed_address,
2948 (unsigned long) retval);
2953 debug_to_insert_watchpoint (CORE_ADDR addr, int len, int type)
2957 retval = debug_target.to_insert_watchpoint (addr, len, type);
2959 fprintf_unfiltered (gdb_stdlog,
2960 "target_insert_watchpoint (0x%lx, %d, %d) = %ld\n",
2961 (unsigned long) addr, len, type, (unsigned long) retval);
2966 debug_to_remove_watchpoint (CORE_ADDR addr, int len, int type)
2970 retval = debug_target.to_remove_watchpoint (addr, len, type);
2972 fprintf_unfiltered (gdb_stdlog,
2973 "target_remove_watchpoint (0x%lx, %d, %d) = %ld\n",
2974 (unsigned long) addr, len, type, (unsigned long) retval);
2979 debug_to_terminal_init (void)
2981 debug_target.to_terminal_init ();
2983 fprintf_unfiltered (gdb_stdlog, "target_terminal_init ()\n");
2987 debug_to_terminal_inferior (void)
2989 debug_target.to_terminal_inferior ();
2991 fprintf_unfiltered (gdb_stdlog, "target_terminal_inferior ()\n");
2995 debug_to_terminal_ours_for_output (void)
2997 debug_target.to_terminal_ours_for_output ();
2999 fprintf_unfiltered (gdb_stdlog, "target_terminal_ours_for_output ()\n");
3003 debug_to_terminal_ours (void)
3005 debug_target.to_terminal_ours ();
3007 fprintf_unfiltered (gdb_stdlog, "target_terminal_ours ()\n");
3011 debug_to_terminal_save_ours (void)
3013 debug_target.to_terminal_save_ours ();
3015 fprintf_unfiltered (gdb_stdlog, "target_terminal_save_ours ()\n");
3019 debug_to_terminal_info (char *arg, int from_tty)
3021 debug_target.to_terminal_info (arg, from_tty);
3023 fprintf_unfiltered (gdb_stdlog, "target_terminal_info (%s, %d)\n", arg,
3028 debug_to_kill (void)
3030 debug_target.to_kill ();
3032 fprintf_unfiltered (gdb_stdlog, "target_kill ()\n");
3036 debug_to_load (char *args, int from_tty)
3038 debug_target.to_load (args, from_tty);
3040 fprintf_unfiltered (gdb_stdlog, "target_load (%s, %d)\n", args, from_tty);
3044 debug_to_lookup_symbol (char *name, CORE_ADDR *addrp)
3048 retval = debug_target.to_lookup_symbol (name, addrp);
3050 fprintf_unfiltered (gdb_stdlog, "target_lookup_symbol (%s, xxx)\n", name);
3056 debug_to_post_startup_inferior (ptid_t ptid)
3058 debug_target.to_post_startup_inferior (ptid);
3060 fprintf_unfiltered (gdb_stdlog, "target_post_startup_inferior (%d)\n",
3065 debug_to_acknowledge_created_inferior (int pid)
3067 debug_target.to_acknowledge_created_inferior (pid);
3069 fprintf_unfiltered (gdb_stdlog, "target_acknowledge_created_inferior (%d)\n",
3074 debug_to_insert_fork_catchpoint (int pid)
3076 debug_target.to_insert_fork_catchpoint (pid);
3078 fprintf_unfiltered (gdb_stdlog, "target_insert_fork_catchpoint (%d)\n",
3083 debug_to_remove_fork_catchpoint (int pid)
3087 retval = debug_target.to_remove_fork_catchpoint (pid);
3089 fprintf_unfiltered (gdb_stdlog, "target_remove_fork_catchpoint (%d) = %d\n",
3096 debug_to_insert_vfork_catchpoint (int pid)
3098 debug_target.to_insert_vfork_catchpoint (pid);
3100 fprintf_unfiltered (gdb_stdlog, "target_insert_vfork_catchpoint (%d)\n",
3105 debug_to_remove_vfork_catchpoint (int pid)
3109 retval = debug_target.to_remove_vfork_catchpoint (pid);
3111 fprintf_unfiltered (gdb_stdlog, "target_remove_vfork_catchpoint (%d) = %d\n",
3118 debug_to_insert_exec_catchpoint (int pid)
3120 debug_target.to_insert_exec_catchpoint (pid);
3122 fprintf_unfiltered (gdb_stdlog, "target_insert_exec_catchpoint (%d)\n",
3127 debug_to_remove_exec_catchpoint (int pid)
3131 retval = debug_target.to_remove_exec_catchpoint (pid);
3133 fprintf_unfiltered (gdb_stdlog, "target_remove_exec_catchpoint (%d) = %d\n",
3140 debug_to_has_exited (int pid, int wait_status, int *exit_status)
3144 has_exited = debug_target.to_has_exited (pid, wait_status, exit_status);
3146 fprintf_unfiltered (gdb_stdlog, "target_has_exited (%d, %d, %d) = %d\n",
3147 pid, wait_status, *exit_status, has_exited);
3153 debug_to_can_run (void)
3157 retval = debug_target.to_can_run ();
3159 fprintf_unfiltered (gdb_stdlog, "target_can_run () = %d\n", retval);
3165 debug_to_notice_signals (ptid_t ptid)
3167 debug_target.to_notice_signals (ptid);
3169 fprintf_unfiltered (gdb_stdlog, "target_notice_signals (%d)\n",
3174 debug_to_stop (ptid_t ptid)
3176 debug_target.to_stop (ptid);
3178 fprintf_unfiltered (gdb_stdlog, "target_stop (%s)\n",
3179 target_pid_to_str (ptid));
3183 debug_to_rcmd (char *command,
3184 struct ui_file *outbuf)
3186 debug_target.to_rcmd (command, outbuf);
3187 fprintf_unfiltered (gdb_stdlog, "target_rcmd (%s, ...)\n", command);
3191 debug_to_pid_to_exec_file (int pid)
3195 exec_file = debug_target.to_pid_to_exec_file (pid);
3197 fprintf_unfiltered (gdb_stdlog, "target_pid_to_exec_file (%d) = %s\n",
3204 setup_target_debug (void)
3206 memcpy (&debug_target, ¤t_target, sizeof debug_target);
3208 current_target.to_open = debug_to_open;
3209 current_target.to_post_attach = debug_to_post_attach;
3210 current_target.to_prepare_to_store = debug_to_prepare_to_store;
3211 current_target.deprecated_xfer_memory = deprecated_debug_xfer_memory;
3212 current_target.to_files_info = debug_to_files_info;
3213 current_target.to_insert_breakpoint = debug_to_insert_breakpoint;
3214 current_target.to_remove_breakpoint = debug_to_remove_breakpoint;
3215 current_target.to_can_use_hw_breakpoint = debug_to_can_use_hw_breakpoint;
3216 current_target.to_insert_hw_breakpoint = debug_to_insert_hw_breakpoint;
3217 current_target.to_remove_hw_breakpoint = debug_to_remove_hw_breakpoint;
3218 current_target.to_insert_watchpoint = debug_to_insert_watchpoint;
3219 current_target.to_remove_watchpoint = debug_to_remove_watchpoint;
3220 current_target.to_stopped_by_watchpoint = debug_to_stopped_by_watchpoint;
3221 current_target.to_stopped_data_address = debug_to_stopped_data_address;
3222 current_target.to_watchpoint_addr_within_range = debug_to_watchpoint_addr_within_range;
3223 current_target.to_region_ok_for_hw_watchpoint = debug_to_region_ok_for_hw_watchpoint;
3224 current_target.to_terminal_init = debug_to_terminal_init;
3225 current_target.to_terminal_inferior = debug_to_terminal_inferior;
3226 current_target.to_terminal_ours_for_output = debug_to_terminal_ours_for_output;
3227 current_target.to_terminal_ours = debug_to_terminal_ours;
3228 current_target.to_terminal_save_ours = debug_to_terminal_save_ours;
3229 current_target.to_terminal_info = debug_to_terminal_info;
3230 current_target.to_kill = debug_to_kill;
3231 current_target.to_load = debug_to_load;
3232 current_target.to_lookup_symbol = debug_to_lookup_symbol;
3233 current_target.to_post_startup_inferior = debug_to_post_startup_inferior;
3234 current_target.to_acknowledge_created_inferior = debug_to_acknowledge_created_inferior;
3235 current_target.to_insert_fork_catchpoint = debug_to_insert_fork_catchpoint;
3236 current_target.to_remove_fork_catchpoint = debug_to_remove_fork_catchpoint;
3237 current_target.to_insert_vfork_catchpoint = debug_to_insert_vfork_catchpoint;
3238 current_target.to_remove_vfork_catchpoint = debug_to_remove_vfork_catchpoint;
3239 current_target.to_insert_exec_catchpoint = debug_to_insert_exec_catchpoint;
3240 current_target.to_remove_exec_catchpoint = debug_to_remove_exec_catchpoint;
3241 current_target.to_has_exited = debug_to_has_exited;
3242 current_target.to_can_run = debug_to_can_run;
3243 current_target.to_notice_signals = debug_to_notice_signals;
3244 current_target.to_stop = debug_to_stop;
3245 current_target.to_rcmd = debug_to_rcmd;
3246 current_target.to_pid_to_exec_file = debug_to_pid_to_exec_file;
3250 static char targ_desc[] =
3251 "Names of targets and files being debugged.\n\
3252 Shows the entire stack of targets currently in use (including the exec-file,\n\
3253 core-file, and process, if any), as well as the symbol file name.";
3256 do_monitor_command (char *cmd,
3259 if ((current_target.to_rcmd
3260 == (void (*) (char *, struct ui_file *)) tcomplain)
3261 || (current_target.to_rcmd == debug_to_rcmd
3262 && (debug_target.to_rcmd
3263 == (void (*) (char *, struct ui_file *)) tcomplain)))
3264 error (_("\"monitor\" command not supported by this target."));
3265 target_rcmd (cmd, gdb_stdtarg);
3268 /* Print the name of each layers of our target stack. */
3271 maintenance_print_target_stack (char *cmd, int from_tty)
3273 struct target_ops *t;
3275 printf_filtered (_("The current target stack is:\n"));
3277 for (t = target_stack; t != NULL; t = t->beneath)
3279 printf_filtered (" - %s (%s)\n", t->to_shortname, t->to_longname);
3283 /* Controls if async mode is permitted. */
3284 int target_async_permitted = 0;
3286 /* The set command writes to this variable. If the inferior is
3287 executing, linux_nat_async_permitted is *not* updated. */
3288 static int target_async_permitted_1 = 0;
3291 set_maintenance_target_async_permitted (char *args, int from_tty,
3292 struct cmd_list_element *c)
3294 if (target_has_execution)
3296 target_async_permitted_1 = target_async_permitted;
3297 error (_("Cannot change this setting while the inferior is running."));
3300 target_async_permitted = target_async_permitted_1;
3304 show_maintenance_target_async_permitted (struct ui_file *file, int from_tty,
3305 struct cmd_list_element *c,
3308 fprintf_filtered (file, _("\
3309 Controlling the inferior in asynchronous mode is %s.\n"), value);
3313 initialize_targets (void)
3315 init_dummy_target ();
3316 push_target (&dummy_target);
3318 add_info ("target", target_info, targ_desc);
3319 add_info ("files", target_info, targ_desc);
3321 add_setshow_zinteger_cmd ("target", class_maintenance, &targetdebug, _("\
3322 Set target debugging."), _("\
3323 Show target debugging."), _("\
3324 When non-zero, target debugging is enabled. Higher numbers are more\n\
3325 verbose. Changes do not take effect until the next \"run\" or \"target\"\n\
3329 &setdebuglist, &showdebuglist);
3331 add_setshow_boolean_cmd ("trust-readonly-sections", class_support,
3332 &trust_readonly, _("\
3333 Set mode for reading from readonly sections."), _("\
3334 Show mode for reading from readonly sections."), _("\
3335 When this mode is on, memory reads from readonly sections (such as .text)\n\
3336 will be read from the object file instead of from the target. This will\n\
3337 result in significant performance improvement for remote targets."),
3339 show_trust_readonly,
3340 &setlist, &showlist);
3342 add_com ("monitor", class_obscure, do_monitor_command,
3343 _("Send a command to the remote monitor (remote targets only)."));
3345 add_cmd ("target-stack", class_maintenance, maintenance_print_target_stack,
3346 _("Print the name of each layer of the internal target stack."),
3347 &maintenanceprintlist);
3349 add_setshow_boolean_cmd ("target-async", no_class,
3350 &target_async_permitted_1, _("\
3351 Set whether gdb controls the inferior in asynchronous mode."), _("\
3352 Show whether gdb controls the inferior in asynchronous mode."), _("\
3353 Tells gdb whether to control the inferior in asynchronous mode."),
3354 set_maintenance_target_async_permitted,
3355 show_maintenance_target_async_permitted,
3359 target_dcache = dcache_init ();