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, 2010, 2011
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 #include "inline-frame.h"
46 #include "tracepoint.h"
48 static void target_info (char *, int);
50 static void default_terminal_info (char *, int);
52 static int default_watchpoint_addr_within_range (struct target_ops *,
53 CORE_ADDR, CORE_ADDR, int);
55 static int default_region_ok_for_hw_watchpoint (CORE_ADDR, int);
57 static void tcomplain (void) ATTRIBUTE_NORETURN;
59 static int nomemory (CORE_ADDR, char *, int, int, struct target_ops *);
61 static int return_zero (void);
63 static int return_one (void);
65 static int return_minus_one (void);
67 void target_ignore (void);
69 static void target_command (char *, int);
71 static struct target_ops *find_default_run_target (char *);
73 static LONGEST default_xfer_partial (struct target_ops *ops,
74 enum target_object object,
75 const char *annex, gdb_byte *readbuf,
76 const gdb_byte *writebuf,
77 ULONGEST offset, LONGEST len);
79 static LONGEST current_xfer_partial (struct target_ops *ops,
80 enum target_object object,
81 const char *annex, gdb_byte *readbuf,
82 const gdb_byte *writebuf,
83 ULONGEST offset, LONGEST len);
85 static LONGEST target_xfer_partial (struct target_ops *ops,
86 enum target_object object,
88 void *readbuf, const void *writebuf,
89 ULONGEST offset, LONGEST len);
91 static struct gdbarch *default_thread_architecture (struct target_ops *ops,
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 gdbarch *,
105 struct bp_target_info *);
107 static int debug_to_remove_breakpoint (struct gdbarch *,
108 struct bp_target_info *);
110 static int debug_to_can_use_hw_breakpoint (int, int, int);
112 static int debug_to_insert_hw_breakpoint (struct gdbarch *,
113 struct bp_target_info *);
115 static int debug_to_remove_hw_breakpoint (struct gdbarch *,
116 struct bp_target_info *);
118 static int debug_to_insert_watchpoint (CORE_ADDR, int, int,
119 struct expression *);
121 static int debug_to_remove_watchpoint (CORE_ADDR, int, int,
122 struct expression *);
124 static int debug_to_stopped_by_watchpoint (void);
126 static int debug_to_stopped_data_address (struct target_ops *, CORE_ADDR *);
128 static int debug_to_watchpoint_addr_within_range (struct target_ops *,
129 CORE_ADDR, CORE_ADDR, int);
131 static int debug_to_region_ok_for_hw_watchpoint (CORE_ADDR, int);
133 static int debug_to_can_accel_watchpoint_condition (CORE_ADDR, int, int,
134 struct expression *);
136 static void debug_to_terminal_init (void);
138 static void debug_to_terminal_inferior (void);
140 static void debug_to_terminal_ours_for_output (void);
142 static void debug_to_terminal_save_ours (void);
144 static void debug_to_terminal_ours (void);
146 static void debug_to_terminal_info (char *, int);
148 static void debug_to_load (char *, int);
150 static int debug_to_can_run (void);
152 static void debug_to_stop (ptid_t);
154 /* Pointer to array of target architecture structures; the size of the
155 array; the current index into the array; the allocated size of the
157 struct target_ops **target_structs;
158 unsigned target_struct_size;
159 unsigned target_struct_index;
160 unsigned target_struct_allocsize;
161 #define DEFAULT_ALLOCSIZE 10
163 /* The initial current target, so that there is always a semi-valid
166 static struct target_ops dummy_target;
168 /* Top of target stack. */
170 static struct target_ops *target_stack;
172 /* The target structure we are currently using to talk to a process
173 or file or whatever "inferior" we have. */
175 struct target_ops current_target;
177 /* Command list for target. */
179 static struct cmd_list_element *targetlist = NULL;
181 /* Nonzero if we should trust readonly sections from the
182 executable when reading memory. */
184 static int trust_readonly = 0;
186 /* Nonzero if we should show true memory content including
187 memory breakpoint inserted by gdb. */
189 static int show_memory_breakpoints = 0;
191 /* These globals control whether GDB attempts to perform these
192 operations; they are useful for targets that need to prevent
193 inadvertant disruption, such as in non-stop mode. */
195 int may_write_registers = 1;
197 int may_write_memory = 1;
199 int may_insert_breakpoints = 1;
201 int may_insert_tracepoints = 1;
203 int may_insert_fast_tracepoints = 1;
207 /* Non-zero if we want to see trace of target level stuff. */
209 static int targetdebug = 0;
211 show_targetdebug (struct ui_file *file, int from_tty,
212 struct cmd_list_element *c, const char *value)
214 fprintf_filtered (file, _("Target debugging is %s.\n"), value);
217 static void setup_target_debug (void);
219 /* The option sets this. */
220 static int stack_cache_enabled_p_1 = 1;
221 /* And set_stack_cache_enabled_p updates this.
222 The reason for the separation is so that we don't flush the cache for
223 on->on transitions. */
224 static int stack_cache_enabled_p = 1;
226 /* This is called *after* the stack-cache has been set.
227 Flush the cache for off->on and on->off transitions.
228 There's no real need to flush the cache for on->off transitions,
229 except cleanliness. */
232 set_stack_cache_enabled_p (char *args, int from_tty,
233 struct cmd_list_element *c)
235 if (stack_cache_enabled_p != stack_cache_enabled_p_1)
236 target_dcache_invalidate ();
238 stack_cache_enabled_p = stack_cache_enabled_p_1;
242 show_stack_cache_enabled_p (struct ui_file *file, int from_tty,
243 struct cmd_list_element *c, const char *value)
245 fprintf_filtered (file, _("Cache use for stack accesses is %s.\n"), value);
248 /* Cache of memory operations, to speed up remote access. */
249 static DCACHE *target_dcache;
251 /* Invalidate the target dcache. */
254 target_dcache_invalidate (void)
256 dcache_invalidate (target_dcache);
259 /* The user just typed 'target' without the name of a target. */
262 target_command (char *arg, int from_tty)
264 fputs_filtered ("Argument required (target name). Try `help target'\n",
268 /* Default target_has_* methods for process_stratum targets. */
271 default_child_has_all_memory (struct target_ops *ops)
273 /* If no inferior selected, then we can't read memory here. */
274 if (ptid_equal (inferior_ptid, null_ptid))
281 default_child_has_memory (struct target_ops *ops)
283 /* If no inferior selected, then we can't read memory here. */
284 if (ptid_equal (inferior_ptid, null_ptid))
291 default_child_has_stack (struct target_ops *ops)
293 /* If no inferior selected, there's no stack. */
294 if (ptid_equal (inferior_ptid, null_ptid))
301 default_child_has_registers (struct target_ops *ops)
303 /* Can't read registers from no inferior. */
304 if (ptid_equal (inferior_ptid, null_ptid))
311 default_child_has_execution (struct target_ops *ops, ptid_t the_ptid)
313 /* If there's no thread selected, then we can't make it run through
315 if (ptid_equal (the_ptid, null_ptid))
323 target_has_all_memory_1 (void)
325 struct target_ops *t;
327 for (t = current_target.beneath; t != NULL; t = t->beneath)
328 if (t->to_has_all_memory (t))
335 target_has_memory_1 (void)
337 struct target_ops *t;
339 for (t = current_target.beneath; t != NULL; t = t->beneath)
340 if (t->to_has_memory (t))
347 target_has_stack_1 (void)
349 struct target_ops *t;
351 for (t = current_target.beneath; t != NULL; t = t->beneath)
352 if (t->to_has_stack (t))
359 target_has_registers_1 (void)
361 struct target_ops *t;
363 for (t = current_target.beneath; t != NULL; t = t->beneath)
364 if (t->to_has_registers (t))
371 target_has_execution_1 (ptid_t the_ptid)
373 struct target_ops *t;
375 for (t = current_target.beneath; t != NULL; t = t->beneath)
376 if (t->to_has_execution (t, the_ptid))
383 target_has_execution_current (void)
385 return target_has_execution_1 (inferior_ptid);
388 /* Add a possible target architecture to the list. */
391 add_target (struct target_ops *t)
393 /* Provide default values for all "must have" methods. */
394 if (t->to_xfer_partial == NULL)
395 t->to_xfer_partial = default_xfer_partial;
397 if (t->to_has_all_memory == NULL)
398 t->to_has_all_memory = (int (*) (struct target_ops *)) return_zero;
400 if (t->to_has_memory == NULL)
401 t->to_has_memory = (int (*) (struct target_ops *)) return_zero;
403 if (t->to_has_stack == NULL)
404 t->to_has_stack = (int (*) (struct target_ops *)) return_zero;
406 if (t->to_has_registers == NULL)
407 t->to_has_registers = (int (*) (struct target_ops *)) return_zero;
409 if (t->to_has_execution == NULL)
410 t->to_has_execution = (int (*) (struct target_ops *, ptid_t)) return_zero;
414 target_struct_allocsize = DEFAULT_ALLOCSIZE;
415 target_structs = (struct target_ops **) xmalloc
416 (target_struct_allocsize * sizeof (*target_structs));
418 if (target_struct_size >= target_struct_allocsize)
420 target_struct_allocsize *= 2;
421 target_structs = (struct target_ops **)
422 xrealloc ((char *) target_structs,
423 target_struct_allocsize * sizeof (*target_structs));
425 target_structs[target_struct_size++] = t;
427 if (targetlist == NULL)
428 add_prefix_cmd ("target", class_run, target_command, _("\
429 Connect to a target machine or process.\n\
430 The first argument is the type or protocol of the target machine.\n\
431 Remaining arguments are interpreted by the target protocol. For more\n\
432 information on the arguments for a particular protocol, type\n\
433 `help target ' followed by the protocol name."),
434 &targetlist, "target ", 0, &cmdlist);
435 add_cmd (t->to_shortname, no_class, t->to_open, t->to_doc, &targetlist);
448 struct target_ops *t;
450 for (t = current_target.beneath; t != NULL; t = t->beneath)
451 if (t->to_kill != NULL)
454 fprintf_unfiltered (gdb_stdlog, "target_kill ()\n");
464 target_load (char *arg, int from_tty)
466 target_dcache_invalidate ();
467 (*current_target.to_load) (arg, from_tty);
471 target_create_inferior (char *exec_file, char *args,
472 char **env, int from_tty)
474 struct target_ops *t;
476 for (t = current_target.beneath; t != NULL; t = t->beneath)
478 if (t->to_create_inferior != NULL)
480 t->to_create_inferior (t, exec_file, args, env, from_tty);
482 fprintf_unfiltered (gdb_stdlog,
483 "target_create_inferior (%s, %s, xxx, %d)\n",
484 exec_file, args, from_tty);
489 internal_error (__FILE__, __LINE__,
490 _("could not find a target to create inferior"));
494 target_terminal_inferior (void)
496 /* A background resume (``run&'') should leave GDB in control of the
497 terminal. Use target_can_async_p, not target_is_async_p, since at
498 this point the target is not async yet. However, if sync_execution
499 is not set, we know it will become async prior to resume. */
500 if (target_can_async_p () && !sync_execution)
503 /* If GDB is resuming the inferior in the foreground, install
504 inferior's terminal modes. */
505 (*current_target.to_terminal_inferior) ();
509 nomemory (CORE_ADDR memaddr, char *myaddr, int len, int write,
510 struct target_ops *t)
512 errno = EIO; /* Can't read/write this location. */
513 return 0; /* No bytes handled. */
519 error (_("You can't do that when your target is `%s'"),
520 current_target.to_shortname);
526 error (_("You can't do that without a process to debug."));
530 default_terminal_info (char *args, int from_tty)
532 printf_unfiltered (_("No saved terminal information.\n"));
535 /* A default implementation for the to_get_ada_task_ptid target method.
537 This function builds the PTID by using both LWP and TID as part of
538 the PTID lwp and tid elements. The pid used is the pid of the
542 default_get_ada_task_ptid (long lwp, long tid)
544 return ptid_build (ptid_get_pid (inferior_ptid), lwp, tid);
547 static enum exec_direction_kind
548 default_execution_direction (void)
550 if (!target_can_execute_reverse)
552 else if (!target_can_async_p ())
555 gdb_assert_not_reached ("\
556 to_execution_direction must be implemented for reverse async");
559 /* Go through the target stack from top to bottom, copying over zero
560 entries in current_target, then filling in still empty entries. In
561 effect, we are doing class inheritance through the pushed target
564 NOTE: cagney/2003-10-17: The problem with this inheritance, as it
565 is currently implemented, is that it discards any knowledge of
566 which target an inherited method originally belonged to.
567 Consequently, new new target methods should instead explicitly and
568 locally search the target stack for the target that can handle the
572 update_current_target (void)
574 struct target_ops *t;
576 /* First, reset current's contents. */
577 memset (¤t_target, 0, sizeof (current_target));
579 #define INHERIT(FIELD, TARGET) \
580 if (!current_target.FIELD) \
581 current_target.FIELD = (TARGET)->FIELD
583 for (t = target_stack; t; t = t->beneath)
585 INHERIT (to_shortname, t);
586 INHERIT (to_longname, t);
588 /* Do not inherit to_open. */
589 /* Do not inherit to_close. */
590 /* Do not inherit to_attach. */
591 INHERIT (to_post_attach, t);
592 INHERIT (to_attach_no_wait, t);
593 /* Do not inherit to_detach. */
594 /* Do not inherit to_disconnect. */
595 /* Do not inherit to_resume. */
596 /* Do not inherit to_wait. */
597 /* Do not inherit to_fetch_registers. */
598 /* Do not inherit to_store_registers. */
599 INHERIT (to_prepare_to_store, t);
600 INHERIT (deprecated_xfer_memory, t);
601 INHERIT (to_files_info, t);
602 INHERIT (to_insert_breakpoint, t);
603 INHERIT (to_remove_breakpoint, t);
604 INHERIT (to_can_use_hw_breakpoint, t);
605 INHERIT (to_insert_hw_breakpoint, t);
606 INHERIT (to_remove_hw_breakpoint, t);
607 /* Do not inherit to_ranged_break_num_registers. */
608 INHERIT (to_insert_watchpoint, t);
609 INHERIT (to_remove_watchpoint, t);
610 /* Do not inherit to_insert_mask_watchpoint. */
611 /* Do not inherit to_remove_mask_watchpoint. */
612 INHERIT (to_stopped_data_address, t);
613 INHERIT (to_have_steppable_watchpoint, t);
614 INHERIT (to_have_continuable_watchpoint, t);
615 INHERIT (to_stopped_by_watchpoint, t);
616 INHERIT (to_watchpoint_addr_within_range, t);
617 INHERIT (to_region_ok_for_hw_watchpoint, t);
618 INHERIT (to_can_accel_watchpoint_condition, t);
619 /* Do not inherit to_masked_watch_num_registers. */
620 INHERIT (to_terminal_init, t);
621 INHERIT (to_terminal_inferior, t);
622 INHERIT (to_terminal_ours_for_output, t);
623 INHERIT (to_terminal_ours, t);
624 INHERIT (to_terminal_save_ours, t);
625 INHERIT (to_terminal_info, t);
626 /* Do not inherit to_kill. */
627 INHERIT (to_load, t);
628 /* Do no inherit to_create_inferior. */
629 INHERIT (to_post_startup_inferior, t);
630 INHERIT (to_insert_fork_catchpoint, t);
631 INHERIT (to_remove_fork_catchpoint, t);
632 INHERIT (to_insert_vfork_catchpoint, t);
633 INHERIT (to_remove_vfork_catchpoint, t);
634 /* Do not inherit to_follow_fork. */
635 INHERIT (to_insert_exec_catchpoint, t);
636 INHERIT (to_remove_exec_catchpoint, t);
637 INHERIT (to_set_syscall_catchpoint, t);
638 INHERIT (to_has_exited, t);
639 /* Do not inherit to_mourn_inferior. */
640 INHERIT (to_can_run, t);
641 /* Do not inherit to_pass_signals. */
642 /* Do not inherit to_thread_alive. */
643 /* Do not inherit to_find_new_threads. */
644 /* Do not inherit to_pid_to_str. */
645 INHERIT (to_extra_thread_info, t);
646 INHERIT (to_thread_name, t);
647 INHERIT (to_stop, t);
648 /* Do not inherit to_xfer_partial. */
649 INHERIT (to_rcmd, t);
650 INHERIT (to_pid_to_exec_file, t);
651 INHERIT (to_log_command, t);
652 INHERIT (to_stratum, t);
653 /* Do not inherit to_has_all_memory. */
654 /* Do not inherit to_has_memory. */
655 /* Do not inherit to_has_stack. */
656 /* Do not inherit to_has_registers. */
657 /* Do not inherit to_has_execution. */
658 INHERIT (to_has_thread_control, t);
659 INHERIT (to_can_async_p, t);
660 INHERIT (to_is_async_p, t);
661 INHERIT (to_async, t);
662 INHERIT (to_find_memory_regions, t);
663 INHERIT (to_make_corefile_notes, t);
664 INHERIT (to_get_bookmark, t);
665 INHERIT (to_goto_bookmark, t);
666 /* Do not inherit to_get_thread_local_address. */
667 INHERIT (to_can_execute_reverse, t);
668 INHERIT (to_execution_direction, t);
669 INHERIT (to_thread_architecture, t);
670 /* Do not inherit to_read_description. */
671 INHERIT (to_get_ada_task_ptid, t);
672 /* Do not inherit to_search_memory. */
673 INHERIT (to_supports_multi_process, t);
674 INHERIT (to_supports_enable_disable_tracepoint, t);
675 INHERIT (to_supports_string_tracing, t);
676 INHERIT (to_trace_init, t);
677 INHERIT (to_download_tracepoint, t);
678 INHERIT (to_can_download_tracepoint, t);
679 INHERIT (to_download_trace_state_variable, t);
680 INHERIT (to_enable_tracepoint, t);
681 INHERIT (to_disable_tracepoint, t);
682 INHERIT (to_trace_set_readonly_regions, t);
683 INHERIT (to_trace_start, t);
684 INHERIT (to_get_trace_status, t);
685 INHERIT (to_get_tracepoint_status, t);
686 INHERIT (to_trace_stop, t);
687 INHERIT (to_trace_find, t);
688 INHERIT (to_get_trace_state_variable_value, t);
689 INHERIT (to_save_trace_data, t);
690 INHERIT (to_upload_tracepoints, t);
691 INHERIT (to_upload_trace_state_variables, t);
692 INHERIT (to_get_raw_trace_data, t);
693 INHERIT (to_get_min_fast_tracepoint_insn_len, t);
694 INHERIT (to_set_disconnected_tracing, t);
695 INHERIT (to_set_circular_trace_buffer, t);
696 INHERIT (to_set_trace_notes, t);
697 INHERIT (to_get_tib_address, t);
698 INHERIT (to_set_permissions, t);
699 INHERIT (to_static_tracepoint_marker_at, t);
700 INHERIT (to_static_tracepoint_markers_by_strid, t);
701 INHERIT (to_traceframe_info, t);
702 INHERIT (to_magic, t);
703 /* Do not inherit to_memory_map. */
704 /* Do not inherit to_flash_erase. */
705 /* Do not inherit to_flash_done. */
709 /* Clean up a target struct so it no longer has any zero pointers in
710 it. Some entries are defaulted to a method that print an error,
711 others are hard-wired to a standard recursive default. */
713 #define de_fault(field, value) \
714 if (!current_target.field) \
715 current_target.field = value
718 (void (*) (char *, int))
723 de_fault (to_post_attach,
726 de_fault (to_prepare_to_store,
727 (void (*) (struct regcache *))
729 de_fault (deprecated_xfer_memory,
730 (int (*) (CORE_ADDR, gdb_byte *, int, int,
731 struct mem_attrib *, struct target_ops *))
733 de_fault (to_files_info,
734 (void (*) (struct target_ops *))
736 de_fault (to_insert_breakpoint,
737 memory_insert_breakpoint);
738 de_fault (to_remove_breakpoint,
739 memory_remove_breakpoint);
740 de_fault (to_can_use_hw_breakpoint,
741 (int (*) (int, int, int))
743 de_fault (to_insert_hw_breakpoint,
744 (int (*) (struct gdbarch *, struct bp_target_info *))
746 de_fault (to_remove_hw_breakpoint,
747 (int (*) (struct gdbarch *, struct bp_target_info *))
749 de_fault (to_insert_watchpoint,
750 (int (*) (CORE_ADDR, int, int, struct expression *))
752 de_fault (to_remove_watchpoint,
753 (int (*) (CORE_ADDR, int, int, struct expression *))
755 de_fault (to_stopped_by_watchpoint,
758 de_fault (to_stopped_data_address,
759 (int (*) (struct target_ops *, CORE_ADDR *))
761 de_fault (to_watchpoint_addr_within_range,
762 default_watchpoint_addr_within_range);
763 de_fault (to_region_ok_for_hw_watchpoint,
764 default_region_ok_for_hw_watchpoint);
765 de_fault (to_can_accel_watchpoint_condition,
766 (int (*) (CORE_ADDR, int, int, struct expression *))
768 de_fault (to_terminal_init,
771 de_fault (to_terminal_inferior,
774 de_fault (to_terminal_ours_for_output,
777 de_fault (to_terminal_ours,
780 de_fault (to_terminal_save_ours,
783 de_fault (to_terminal_info,
784 default_terminal_info);
786 (void (*) (char *, int))
788 de_fault (to_post_startup_inferior,
791 de_fault (to_insert_fork_catchpoint,
794 de_fault (to_remove_fork_catchpoint,
797 de_fault (to_insert_vfork_catchpoint,
800 de_fault (to_remove_vfork_catchpoint,
803 de_fault (to_insert_exec_catchpoint,
806 de_fault (to_remove_exec_catchpoint,
809 de_fault (to_set_syscall_catchpoint,
810 (int (*) (int, int, int, int, int *))
812 de_fault (to_has_exited,
813 (int (*) (int, int, int *))
815 de_fault (to_can_run,
817 de_fault (to_extra_thread_info,
818 (char *(*) (struct thread_info *))
820 de_fault (to_thread_name,
821 (char *(*) (struct thread_info *))
826 current_target.to_xfer_partial = current_xfer_partial;
828 (void (*) (char *, struct ui_file *))
830 de_fault (to_pid_to_exec_file,
834 (void (*) (void (*) (enum inferior_event_type, void*), void*))
836 de_fault (to_thread_architecture,
837 default_thread_architecture);
838 current_target.to_read_description = NULL;
839 de_fault (to_get_ada_task_ptid,
840 (ptid_t (*) (long, long))
841 default_get_ada_task_ptid);
842 de_fault (to_supports_multi_process,
845 de_fault (to_supports_enable_disable_tracepoint,
848 de_fault (to_supports_string_tracing,
851 de_fault (to_trace_init,
854 de_fault (to_download_tracepoint,
855 (void (*) (struct bp_location *))
857 de_fault (to_can_download_tracepoint,
860 de_fault (to_download_trace_state_variable,
861 (void (*) (struct trace_state_variable *))
863 de_fault (to_enable_tracepoint,
864 (void (*) (struct bp_location *))
866 de_fault (to_disable_tracepoint,
867 (void (*) (struct bp_location *))
869 de_fault (to_trace_set_readonly_regions,
872 de_fault (to_trace_start,
875 de_fault (to_get_trace_status,
876 (int (*) (struct trace_status *))
878 de_fault (to_get_tracepoint_status,
879 (void (*) (struct breakpoint *, struct uploaded_tp *))
881 de_fault (to_trace_stop,
884 de_fault (to_trace_find,
885 (int (*) (enum trace_find_type, int, ULONGEST, ULONGEST, int *))
887 de_fault (to_get_trace_state_variable_value,
888 (int (*) (int, LONGEST *))
890 de_fault (to_save_trace_data,
891 (int (*) (const char *))
893 de_fault (to_upload_tracepoints,
894 (int (*) (struct uploaded_tp **))
896 de_fault (to_upload_trace_state_variables,
897 (int (*) (struct uploaded_tsv **))
899 de_fault (to_get_raw_trace_data,
900 (LONGEST (*) (gdb_byte *, ULONGEST, LONGEST))
902 de_fault (to_get_min_fast_tracepoint_insn_len,
905 de_fault (to_set_disconnected_tracing,
908 de_fault (to_set_circular_trace_buffer,
911 de_fault (to_set_trace_notes,
912 (int (*) (char *, char *, char *))
914 de_fault (to_get_tib_address,
915 (int (*) (ptid_t, CORE_ADDR *))
917 de_fault (to_set_permissions,
920 de_fault (to_static_tracepoint_marker_at,
921 (int (*) (CORE_ADDR, struct static_tracepoint_marker *))
923 de_fault (to_static_tracepoint_markers_by_strid,
924 (VEC(static_tracepoint_marker_p) * (*) (const char *))
926 de_fault (to_traceframe_info,
927 (struct traceframe_info * (*) (void))
929 de_fault (to_execution_direction, default_execution_direction);
933 /* Finally, position the target-stack beneath the squashed
934 "current_target". That way code looking for a non-inherited
935 target method can quickly and simply find it. */
936 current_target.beneath = target_stack;
939 setup_target_debug ();
942 /* Push a new target type into the stack of the existing target accessors,
943 possibly superseding some of the existing accessors.
945 Rather than allow an empty stack, we always have the dummy target at
946 the bottom stratum, so we can call the function vectors without
950 push_target (struct target_ops *t)
952 struct target_ops **cur;
954 /* Check magic number. If wrong, it probably means someone changed
955 the struct definition, but not all the places that initialize one. */
956 if (t->to_magic != OPS_MAGIC)
958 fprintf_unfiltered (gdb_stderr,
959 "Magic number of %s target struct wrong\n",
961 internal_error (__FILE__, __LINE__,
962 _("failed internal consistency check"));
965 /* Find the proper stratum to install this target in. */
966 for (cur = &target_stack; (*cur) != NULL; cur = &(*cur)->beneath)
968 if ((int) (t->to_stratum) >= (int) (*cur)->to_stratum)
972 /* If there's already targets at this stratum, remove them. */
973 /* FIXME: cagney/2003-10-15: I think this should be popping all
974 targets to CUR, and not just those at this stratum level. */
975 while ((*cur) != NULL && t->to_stratum == (*cur)->to_stratum)
977 /* There's already something at this stratum level. Close it,
978 and un-hook it from the stack. */
979 struct target_ops *tmp = (*cur);
981 (*cur) = (*cur)->beneath;
983 target_close (tmp, 0);
986 /* We have removed all targets in our stratum, now add the new one. */
990 update_current_target ();
993 /* Remove a target_ops vector from the stack, wherever it may be.
994 Return how many times it was removed (0 or 1). */
997 unpush_target (struct target_ops *t)
999 struct target_ops **cur;
1000 struct target_ops *tmp;
1002 if (t->to_stratum == dummy_stratum)
1003 internal_error (__FILE__, __LINE__,
1004 _("Attempt to unpush the dummy target"));
1006 /* Look for the specified target. Note that we assume that a target
1007 can only occur once in the target stack. */
1009 for (cur = &target_stack; (*cur) != NULL; cur = &(*cur)->beneath)
1016 return 0; /* Didn't find target_ops, quit now. */
1018 /* NOTE: cagney/2003-12-06: In '94 the close call was made
1019 unconditional by moving it to before the above check that the
1020 target was in the target stack (something about "Change the way
1021 pushing and popping of targets work to support target overlays
1022 and inheritance"). This doesn't make much sense - only open
1023 targets should be closed. */
1024 target_close (t, 0);
1026 /* Unchain the target. */
1028 (*cur) = (*cur)->beneath;
1029 tmp->beneath = NULL;
1031 update_current_target ();
1039 target_close (target_stack, 0); /* Let it clean up. */
1040 if (unpush_target (target_stack) == 1)
1043 fprintf_unfiltered (gdb_stderr,
1044 "pop_target couldn't find target %s\n",
1045 current_target.to_shortname);
1046 internal_error (__FILE__, __LINE__,
1047 _("failed internal consistency check"));
1051 pop_all_targets_above (enum strata above_stratum, int quitting)
1053 while ((int) (current_target.to_stratum) > (int) above_stratum)
1055 target_close (target_stack, quitting);
1056 if (!unpush_target (target_stack))
1058 fprintf_unfiltered (gdb_stderr,
1059 "pop_all_targets couldn't find target %s\n",
1060 target_stack->to_shortname);
1061 internal_error (__FILE__, __LINE__,
1062 _("failed internal consistency check"));
1069 pop_all_targets (int quitting)
1071 pop_all_targets_above (dummy_stratum, quitting);
1074 /* Return 1 if T is now pushed in the target stack. Return 0 otherwise. */
1077 target_is_pushed (struct target_ops *t)
1079 struct target_ops **cur;
1081 /* Check magic number. If wrong, it probably means someone changed
1082 the struct definition, but not all the places that initialize one. */
1083 if (t->to_magic != OPS_MAGIC)
1085 fprintf_unfiltered (gdb_stderr,
1086 "Magic number of %s target struct wrong\n",
1088 internal_error (__FILE__, __LINE__,
1089 _("failed internal consistency check"));
1092 for (cur = &target_stack; (*cur) != NULL; cur = &(*cur)->beneath)
1099 /* Using the objfile specified in OBJFILE, find the address for the
1100 current thread's thread-local storage with offset OFFSET. */
1102 target_translate_tls_address (struct objfile *objfile, CORE_ADDR offset)
1104 volatile CORE_ADDR addr = 0;
1105 struct target_ops *target;
1107 for (target = current_target.beneath;
1109 target = target->beneath)
1111 if (target->to_get_thread_local_address != NULL)
1116 && gdbarch_fetch_tls_load_module_address_p (target_gdbarch))
1118 ptid_t ptid = inferior_ptid;
1119 volatile struct gdb_exception ex;
1121 TRY_CATCH (ex, RETURN_MASK_ALL)
1125 /* Fetch the load module address for this objfile. */
1126 lm_addr = gdbarch_fetch_tls_load_module_address (target_gdbarch,
1128 /* If it's 0, throw the appropriate exception. */
1130 throw_error (TLS_LOAD_MODULE_NOT_FOUND_ERROR,
1131 _("TLS load module not found"));
1133 addr = target->to_get_thread_local_address (target, ptid,
1136 /* If an error occurred, print TLS related messages here. Otherwise,
1137 throw the error to some higher catcher. */
1140 int objfile_is_library = (objfile->flags & OBJF_SHARED);
1144 case TLS_NO_LIBRARY_SUPPORT_ERROR:
1145 error (_("Cannot find thread-local variables "
1146 "in this thread library."));
1148 case TLS_LOAD_MODULE_NOT_FOUND_ERROR:
1149 if (objfile_is_library)
1150 error (_("Cannot find shared library `%s' in dynamic"
1151 " linker's load module list"), objfile->name);
1153 error (_("Cannot find executable file `%s' in dynamic"
1154 " linker's load module list"), objfile->name);
1156 case TLS_NOT_ALLOCATED_YET_ERROR:
1157 if (objfile_is_library)
1158 error (_("The inferior has not yet allocated storage for"
1159 " thread-local variables in\n"
1160 "the shared library `%s'\n"
1162 objfile->name, target_pid_to_str (ptid));
1164 error (_("The inferior has not yet allocated storage for"
1165 " thread-local variables in\n"
1166 "the executable `%s'\n"
1168 objfile->name, target_pid_to_str (ptid));
1170 case TLS_GENERIC_ERROR:
1171 if (objfile_is_library)
1172 error (_("Cannot find thread-local storage for %s, "
1173 "shared library %s:\n%s"),
1174 target_pid_to_str (ptid),
1175 objfile->name, ex.message);
1177 error (_("Cannot find thread-local storage for %s, "
1178 "executable file %s:\n%s"),
1179 target_pid_to_str (ptid),
1180 objfile->name, ex.message);
1183 throw_exception (ex);
1188 /* It wouldn't be wrong here to try a gdbarch method, too; finding
1189 TLS is an ABI-specific thing. But we don't do that yet. */
1191 error (_("Cannot find thread-local variables on this target"));
1197 #define MIN(A, B) (((A) <= (B)) ? (A) : (B))
1199 /* target_read_string -- read a null terminated string, up to LEN bytes,
1200 from MEMADDR in target. Set *ERRNOP to the errno code, or 0 if successful.
1201 Set *STRING to a pointer to malloc'd memory containing the data; the caller
1202 is responsible for freeing it. Return the number of bytes successfully
1206 target_read_string (CORE_ADDR memaddr, char **string, int len, int *errnop)
1208 int tlen, origlen, offset, i;
1212 int buffer_allocated;
1214 unsigned int nbytes_read = 0;
1216 gdb_assert (string);
1218 /* Small for testing. */
1219 buffer_allocated = 4;
1220 buffer = xmalloc (buffer_allocated);
1227 tlen = MIN (len, 4 - (memaddr & 3));
1228 offset = memaddr & 3;
1230 errcode = target_read_memory (memaddr & ~3, buf, sizeof buf);
1233 /* The transfer request might have crossed the boundary to an
1234 unallocated region of memory. Retry the transfer, requesting
1238 errcode = target_read_memory (memaddr, buf, 1);
1243 if (bufptr - buffer + tlen > buffer_allocated)
1247 bytes = bufptr - buffer;
1248 buffer_allocated *= 2;
1249 buffer = xrealloc (buffer, buffer_allocated);
1250 bufptr = buffer + bytes;
1253 for (i = 0; i < tlen; i++)
1255 *bufptr++ = buf[i + offset];
1256 if (buf[i + offset] == '\000')
1258 nbytes_read += i + 1;
1265 nbytes_read += tlen;
1274 struct target_section_table *
1275 target_get_section_table (struct target_ops *target)
1277 struct target_ops *t;
1280 fprintf_unfiltered (gdb_stdlog, "target_get_section_table ()\n");
1282 for (t = target; t != NULL; t = t->beneath)
1283 if (t->to_get_section_table != NULL)
1284 return (*t->to_get_section_table) (t);
1289 /* Find a section containing ADDR. */
1291 struct target_section *
1292 target_section_by_addr (struct target_ops *target, CORE_ADDR addr)
1294 struct target_section_table *table = target_get_section_table (target);
1295 struct target_section *secp;
1300 for (secp = table->sections; secp < table->sections_end; secp++)
1302 if (addr >= secp->addr && addr < secp->endaddr)
1308 /* Read memory from the live target, even if currently inspecting a
1309 traceframe. The return is the same as that of target_read. */
1312 target_read_live_memory (enum target_object object,
1313 ULONGEST memaddr, gdb_byte *myaddr, LONGEST len)
1316 struct cleanup *cleanup;
1318 /* Switch momentarily out of tfind mode so to access live memory.
1319 Note that this must not clear global state, such as the frame
1320 cache, which must still remain valid for the previous traceframe.
1321 We may be _building_ the frame cache at this point. */
1322 cleanup = make_cleanup_restore_traceframe_number ();
1323 set_traceframe_number (-1);
1325 ret = target_read (current_target.beneath, object, NULL,
1326 myaddr, memaddr, len);
1328 do_cleanups (cleanup);
1332 /* Using the set of read-only target sections of OPS, read live
1333 read-only memory. Note that the actual reads start from the
1334 top-most target again.
1336 For interface/parameters/return description see target.h,
1340 memory_xfer_live_readonly_partial (struct target_ops *ops,
1341 enum target_object object,
1342 gdb_byte *readbuf, ULONGEST memaddr,
1345 struct target_section *secp;
1346 struct target_section_table *table;
1348 secp = target_section_by_addr (ops, memaddr);
1350 && (bfd_get_section_flags (secp->bfd, secp->the_bfd_section)
1353 struct target_section *p;
1354 ULONGEST memend = memaddr + len;
1356 table = target_get_section_table (ops);
1358 for (p = table->sections; p < table->sections_end; p++)
1360 if (memaddr >= p->addr)
1362 if (memend <= p->endaddr)
1364 /* Entire transfer is within this section. */
1365 return target_read_live_memory (object, memaddr,
1368 else if (memaddr >= p->endaddr)
1370 /* This section ends before the transfer starts. */
1375 /* This section overlaps the transfer. Just do half. */
1376 len = p->endaddr - memaddr;
1377 return target_read_live_memory (object, memaddr,
1387 /* Perform a partial memory transfer.
1388 For docs see target.h, to_xfer_partial. */
1391 memory_xfer_partial_1 (struct target_ops *ops, enum target_object object,
1392 void *readbuf, const void *writebuf, ULONGEST memaddr,
1397 struct mem_region *region;
1398 struct inferior *inf;
1400 /* For accesses to unmapped overlay sections, read directly from
1401 files. Must do this first, as MEMADDR may need adjustment. */
1402 if (readbuf != NULL && overlay_debugging)
1404 struct obj_section *section = find_pc_overlay (memaddr);
1406 if (pc_in_unmapped_range (memaddr, section))
1408 struct target_section_table *table
1409 = target_get_section_table (ops);
1410 const char *section_name = section->the_bfd_section->name;
1412 memaddr = overlay_mapped_address (memaddr, section);
1413 return section_table_xfer_memory_partial (readbuf, writebuf,
1416 table->sections_end,
1421 /* Try the executable files, if "trust-readonly-sections" is set. */
1422 if (readbuf != NULL && trust_readonly)
1424 struct target_section *secp;
1425 struct target_section_table *table;
1427 secp = target_section_by_addr (ops, memaddr);
1429 && (bfd_get_section_flags (secp->bfd, secp->the_bfd_section)
1432 table = target_get_section_table (ops);
1433 return section_table_xfer_memory_partial (readbuf, writebuf,
1436 table->sections_end,
1441 /* If reading unavailable memory in the context of traceframes, and
1442 this address falls within a read-only section, fallback to
1443 reading from live memory. */
1444 if (readbuf != NULL && get_traceframe_number () != -1)
1446 VEC(mem_range_s) *available;
1448 /* If we fail to get the set of available memory, then the
1449 target does not support querying traceframe info, and so we
1450 attempt reading from the traceframe anyway (assuming the
1451 target implements the old QTro packet then). */
1452 if (traceframe_available_memory (&available, memaddr, len))
1454 struct cleanup *old_chain;
1456 old_chain = make_cleanup (VEC_cleanup(mem_range_s), &available);
1458 if (VEC_empty (mem_range_s, available)
1459 || VEC_index (mem_range_s, available, 0)->start != memaddr)
1461 /* Don't read into the traceframe's available
1463 if (!VEC_empty (mem_range_s, available))
1465 LONGEST oldlen = len;
1467 len = VEC_index (mem_range_s, available, 0)->start - memaddr;
1468 gdb_assert (len <= oldlen);
1471 do_cleanups (old_chain);
1473 /* This goes through the topmost target again. */
1474 res = memory_xfer_live_readonly_partial (ops, object,
1475 readbuf, memaddr, len);
1479 /* No use trying further, we know some memory starting
1480 at MEMADDR isn't available. */
1484 /* Don't try to read more than how much is available, in
1485 case the target implements the deprecated QTro packet to
1486 cater for older GDBs (the target's knowledge of read-only
1487 sections may be outdated by now). */
1488 len = VEC_index (mem_range_s, available, 0)->length;
1490 do_cleanups (old_chain);
1494 /* Try GDB's internal data cache. */
1495 region = lookup_mem_region (memaddr);
1496 /* region->hi == 0 means there's no upper bound. */
1497 if (memaddr + len < region->hi || region->hi == 0)
1500 reg_len = region->hi - memaddr;
1502 switch (region->attrib.mode)
1505 if (writebuf != NULL)
1510 if (readbuf != NULL)
1515 /* We only support writing to flash during "load" for now. */
1516 if (writebuf != NULL)
1517 error (_("Writing to flash memory forbidden in this context"));
1524 if (!ptid_equal (inferior_ptid, null_ptid))
1525 inf = find_inferior_pid (ptid_get_pid (inferior_ptid));
1530 /* The dcache reads whole cache lines; that doesn't play well
1531 with reading from a trace buffer, because reading outside of
1532 the collected memory range fails. */
1533 && get_traceframe_number () == -1
1534 && (region->attrib.cache
1535 || (stack_cache_enabled_p && object == TARGET_OBJECT_STACK_MEMORY)))
1537 if (readbuf != NULL)
1538 res = dcache_xfer_memory (ops, target_dcache, memaddr, readbuf,
1541 /* FIXME drow/2006-08-09: If we're going to preserve const
1542 correctness dcache_xfer_memory should take readbuf and
1544 res = dcache_xfer_memory (ops, target_dcache, memaddr,
1553 /* If none of those methods found the memory we wanted, fall back
1554 to a target partial transfer. Normally a single call to
1555 to_xfer_partial is enough; if it doesn't recognize an object
1556 it will call the to_xfer_partial of the next target down.
1557 But for memory this won't do. Memory is the only target
1558 object which can be read from more than one valid target.
1559 A core file, for instance, could have some of memory but
1560 delegate other bits to the target below it. So, we must
1561 manually try all targets. */
1565 res = ops->to_xfer_partial (ops, TARGET_OBJECT_MEMORY, NULL,
1566 readbuf, writebuf, memaddr, reg_len);
1570 /* We want to continue past core files to executables, but not
1571 past a running target's memory. */
1572 if (ops->to_has_all_memory (ops))
1577 while (ops != NULL);
1579 /* Make sure the cache gets updated no matter what - if we are writing
1580 to the stack. Even if this write is not tagged as such, we still need
1581 to update the cache. */
1586 && !region->attrib.cache
1587 && stack_cache_enabled_p
1588 && object != TARGET_OBJECT_STACK_MEMORY)
1590 dcache_update (target_dcache, memaddr, (void *) writebuf, res);
1593 /* If we still haven't got anything, return the last error. We
1598 /* Perform a partial memory transfer. For docs see target.h,
1602 memory_xfer_partial (struct target_ops *ops, enum target_object object,
1603 void *readbuf, const void *writebuf, ULONGEST memaddr,
1608 /* Zero length requests are ok and require no work. */
1612 /* Fill in READBUF with breakpoint shadows, or WRITEBUF with
1613 breakpoint insns, thus hiding out from higher layers whether
1614 there are software breakpoints inserted in the code stream. */
1615 if (readbuf != NULL)
1617 res = memory_xfer_partial_1 (ops, object, readbuf, NULL, memaddr, len);
1619 if (res > 0 && !show_memory_breakpoints)
1620 breakpoint_xfer_memory (readbuf, NULL, NULL, memaddr, res);
1625 struct cleanup *old_chain;
1627 buf = xmalloc (len);
1628 old_chain = make_cleanup (xfree, buf);
1629 memcpy (buf, writebuf, len);
1631 breakpoint_xfer_memory (NULL, buf, writebuf, memaddr, len);
1632 res = memory_xfer_partial_1 (ops, object, NULL, buf, memaddr, len);
1634 do_cleanups (old_chain);
1641 restore_show_memory_breakpoints (void *arg)
1643 show_memory_breakpoints = (uintptr_t) arg;
1647 make_show_memory_breakpoints_cleanup (int show)
1649 int current = show_memory_breakpoints;
1651 show_memory_breakpoints = show;
1652 return make_cleanup (restore_show_memory_breakpoints,
1653 (void *) (uintptr_t) current);
1656 /* For docs see target.h, to_xfer_partial. */
1659 target_xfer_partial (struct target_ops *ops,
1660 enum target_object object, const char *annex,
1661 void *readbuf, const void *writebuf,
1662 ULONGEST offset, LONGEST len)
1666 gdb_assert (ops->to_xfer_partial != NULL);
1668 if (writebuf && !may_write_memory)
1669 error (_("Writing to memory is not allowed (addr %s, len %s)"),
1670 core_addr_to_string_nz (offset), plongest (len));
1672 /* If this is a memory transfer, let the memory-specific code
1673 have a look at it instead. Memory transfers are more
1675 if (object == TARGET_OBJECT_MEMORY || object == TARGET_OBJECT_STACK_MEMORY)
1676 retval = memory_xfer_partial (ops, object, readbuf,
1677 writebuf, offset, len);
1680 enum target_object raw_object = object;
1682 /* If this is a raw memory transfer, request the normal
1683 memory object from other layers. */
1684 if (raw_object == TARGET_OBJECT_RAW_MEMORY)
1685 raw_object = TARGET_OBJECT_MEMORY;
1687 retval = ops->to_xfer_partial (ops, raw_object, annex, readbuf,
1688 writebuf, offset, len);
1693 const unsigned char *myaddr = NULL;
1695 fprintf_unfiltered (gdb_stdlog,
1696 "%s:target_xfer_partial "
1697 "(%d, %s, %s, %s, %s, %s) = %s",
1700 (annex ? annex : "(null)"),
1701 host_address_to_string (readbuf),
1702 host_address_to_string (writebuf),
1703 core_addr_to_string_nz (offset),
1704 plongest (len), plongest (retval));
1710 if (retval > 0 && myaddr != NULL)
1714 fputs_unfiltered (", bytes =", gdb_stdlog);
1715 for (i = 0; i < retval; i++)
1717 if ((((intptr_t) &(myaddr[i])) & 0xf) == 0)
1719 if (targetdebug < 2 && i > 0)
1721 fprintf_unfiltered (gdb_stdlog, " ...");
1724 fprintf_unfiltered (gdb_stdlog, "\n");
1727 fprintf_unfiltered (gdb_stdlog, " %02x", myaddr[i] & 0xff);
1731 fputc_unfiltered ('\n', gdb_stdlog);
1736 /* Read LEN bytes of target memory at address MEMADDR, placing the results in
1737 GDB's memory at MYADDR. Returns either 0 for success or an errno value
1738 if any error occurs.
1740 If an error occurs, no guarantee is made about the contents of the data at
1741 MYADDR. In particular, the caller should not depend upon partial reads
1742 filling the buffer with good data. There is no way for the caller to know
1743 how much good data might have been transfered anyway. Callers that can
1744 deal with partial reads should call target_read (which will retry until
1745 it makes no progress, and then return how much was transferred). */
1748 target_read_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len)
1750 /* Dispatch to the topmost target, not the flattened current_target.
1751 Memory accesses check target->to_has_(all_)memory, and the
1752 flattened target doesn't inherit those. */
1753 if (target_read (current_target.beneath, TARGET_OBJECT_MEMORY, NULL,
1754 myaddr, memaddr, len) == len)
1760 /* Like target_read_memory, but specify explicitly that this is a read from
1761 the target's stack. This may trigger different cache behavior. */
1764 target_read_stack (CORE_ADDR memaddr, gdb_byte *myaddr, int len)
1766 /* Dispatch to the topmost target, not the flattened current_target.
1767 Memory accesses check target->to_has_(all_)memory, and the
1768 flattened target doesn't inherit those. */
1770 if (target_read (current_target.beneath, TARGET_OBJECT_STACK_MEMORY, NULL,
1771 myaddr, memaddr, len) == len)
1777 /* Write LEN bytes from MYADDR to target memory at address MEMADDR.
1778 Returns either 0 for success or an errno value if any error occurs.
1779 If an error occurs, no guarantee is made about how much data got written.
1780 Callers that can deal with partial writes should call target_write. */
1783 target_write_memory (CORE_ADDR memaddr, const gdb_byte *myaddr, int len)
1785 /* Dispatch to the topmost target, not the flattened current_target.
1786 Memory accesses check target->to_has_(all_)memory, and the
1787 flattened target doesn't inherit those. */
1788 if (target_write (current_target.beneath, TARGET_OBJECT_MEMORY, NULL,
1789 myaddr, memaddr, len) == len)
1795 /* Write LEN bytes from MYADDR to target raw memory at address
1796 MEMADDR. Returns either 0 for success or an errno value if any
1797 error occurs. If an error occurs, no guarantee is made about how
1798 much data got written. Callers that can deal with partial writes
1799 should call target_write. */
1802 target_write_raw_memory (CORE_ADDR memaddr, const gdb_byte *myaddr, int len)
1804 /* Dispatch to the topmost target, not the flattened current_target.
1805 Memory accesses check target->to_has_(all_)memory, and the
1806 flattened target doesn't inherit those. */
1807 if (target_write (current_target.beneath, TARGET_OBJECT_RAW_MEMORY, NULL,
1808 myaddr, memaddr, len) == len)
1814 /* Fetch the target's memory map. */
1817 target_memory_map (void)
1819 VEC(mem_region_s) *result;
1820 struct mem_region *last_one, *this_one;
1822 struct target_ops *t;
1825 fprintf_unfiltered (gdb_stdlog, "target_memory_map ()\n");
1827 for (t = current_target.beneath; t != NULL; t = t->beneath)
1828 if (t->to_memory_map != NULL)
1834 result = t->to_memory_map (t);
1838 qsort (VEC_address (mem_region_s, result),
1839 VEC_length (mem_region_s, result),
1840 sizeof (struct mem_region), mem_region_cmp);
1842 /* Check that regions do not overlap. Simultaneously assign
1843 a numbering for the "mem" commands to use to refer to
1846 for (ix = 0; VEC_iterate (mem_region_s, result, ix, this_one); ix++)
1848 this_one->number = ix;
1850 if (last_one && last_one->hi > this_one->lo)
1852 warning (_("Overlapping regions in memory map: ignoring"));
1853 VEC_free (mem_region_s, result);
1856 last_one = this_one;
1863 target_flash_erase (ULONGEST address, LONGEST length)
1865 struct target_ops *t;
1867 for (t = current_target.beneath; t != NULL; t = t->beneath)
1868 if (t->to_flash_erase != NULL)
1871 fprintf_unfiltered (gdb_stdlog, "target_flash_erase (%s, %s)\n",
1872 hex_string (address), phex (length, 0));
1873 t->to_flash_erase (t, address, length);
1881 target_flash_done (void)
1883 struct target_ops *t;
1885 for (t = current_target.beneath; t != NULL; t = t->beneath)
1886 if (t->to_flash_done != NULL)
1889 fprintf_unfiltered (gdb_stdlog, "target_flash_done\n");
1890 t->to_flash_done (t);
1898 show_trust_readonly (struct ui_file *file, int from_tty,
1899 struct cmd_list_element *c, const char *value)
1901 fprintf_filtered (file,
1902 _("Mode for reading from readonly sections is %s.\n"),
1906 /* More generic transfers. */
1909 default_xfer_partial (struct target_ops *ops, enum target_object object,
1910 const char *annex, gdb_byte *readbuf,
1911 const gdb_byte *writebuf, ULONGEST offset, LONGEST len)
1913 if (object == TARGET_OBJECT_MEMORY
1914 && ops->deprecated_xfer_memory != NULL)
1915 /* If available, fall back to the target's
1916 "deprecated_xfer_memory" method. */
1921 if (writebuf != NULL)
1923 void *buffer = xmalloc (len);
1924 struct cleanup *cleanup = make_cleanup (xfree, buffer);
1926 memcpy (buffer, writebuf, len);
1927 xfered = ops->deprecated_xfer_memory (offset, buffer, len,
1928 1/*write*/, NULL, ops);
1929 do_cleanups (cleanup);
1931 if (readbuf != NULL)
1932 xfered = ops->deprecated_xfer_memory (offset, readbuf, len,
1933 0/*read*/, NULL, ops);
1936 else if (xfered == 0 && errno == 0)
1937 /* "deprecated_xfer_memory" uses 0, cross checked against
1938 ERRNO as one indication of an error. */
1943 else if (ops->beneath != NULL)
1944 return ops->beneath->to_xfer_partial (ops->beneath, object, annex,
1945 readbuf, writebuf, offset, len);
1950 /* The xfer_partial handler for the topmost target. Unlike the default,
1951 it does not need to handle memory specially; it just passes all
1952 requests down the stack. */
1955 current_xfer_partial (struct target_ops *ops, enum target_object object,
1956 const char *annex, gdb_byte *readbuf,
1957 const gdb_byte *writebuf, ULONGEST offset, LONGEST len)
1959 if (ops->beneath != NULL)
1960 return ops->beneath->to_xfer_partial (ops->beneath, object, annex,
1961 readbuf, writebuf, offset, len);
1966 /* Target vector read/write partial wrapper functions. */
1969 target_read_partial (struct target_ops *ops,
1970 enum target_object object,
1971 const char *annex, gdb_byte *buf,
1972 ULONGEST offset, LONGEST len)
1974 return target_xfer_partial (ops, object, annex, buf, NULL, offset, len);
1978 target_write_partial (struct target_ops *ops,
1979 enum target_object object,
1980 const char *annex, const gdb_byte *buf,
1981 ULONGEST offset, LONGEST len)
1983 return target_xfer_partial (ops, object, annex, NULL, buf, offset, len);
1986 /* Wrappers to perform the full transfer. */
1988 /* For docs on target_read see target.h. */
1991 target_read (struct target_ops *ops,
1992 enum target_object object,
1993 const char *annex, gdb_byte *buf,
1994 ULONGEST offset, LONGEST len)
1998 while (xfered < len)
2000 LONGEST xfer = target_read_partial (ops, object, annex,
2001 (gdb_byte *) buf + xfered,
2002 offset + xfered, len - xfered);
2004 /* Call an observer, notifying them of the xfer progress? */
2015 /* Assuming that the entire [begin, end) range of memory cannot be
2016 read, try to read whatever subrange is possible to read.
2018 The function returns, in RESULT, either zero or one memory block.
2019 If there's a readable subrange at the beginning, it is completely
2020 read and returned. Any further readable subrange will not be read.
2021 Otherwise, if there's a readable subrange at the end, it will be
2022 completely read and returned. Any readable subranges before it
2023 (obviously, not starting at the beginning), will be ignored. In
2024 other cases -- either no readable subrange, or readable subrange(s)
2025 that is neither at the beginning, or end, nothing is returned.
2027 The purpose of this function is to handle a read across a boundary
2028 of accessible memory in a case when memory map is not available.
2029 The above restrictions are fine for this case, but will give
2030 incorrect results if the memory is 'patchy'. However, supporting
2031 'patchy' memory would require trying to read every single byte,
2032 and it seems unacceptable solution. Explicit memory map is
2033 recommended for this case -- and target_read_memory_robust will
2034 take care of reading multiple ranges then. */
2037 read_whatever_is_readable (struct target_ops *ops,
2038 ULONGEST begin, ULONGEST end,
2039 VEC(memory_read_result_s) **result)
2041 gdb_byte *buf = xmalloc (end - begin);
2042 ULONGEST current_begin = begin;
2043 ULONGEST current_end = end;
2045 memory_read_result_s r;
2047 /* If we previously failed to read 1 byte, nothing can be done here. */
2048 if (end - begin <= 1)
2054 /* Check that either first or the last byte is readable, and give up
2055 if not. This heuristic is meant to permit reading accessible memory
2056 at the boundary of accessible region. */
2057 if (target_read_partial (ops, TARGET_OBJECT_MEMORY, NULL,
2058 buf, begin, 1) == 1)
2063 else if (target_read_partial (ops, TARGET_OBJECT_MEMORY, NULL,
2064 buf + (end-begin) - 1, end - 1, 1) == 1)
2075 /* Loop invariant is that the [current_begin, current_end) was previously
2076 found to be not readable as a whole.
2078 Note loop condition -- if the range has 1 byte, we can't divide the range
2079 so there's no point trying further. */
2080 while (current_end - current_begin > 1)
2082 ULONGEST first_half_begin, first_half_end;
2083 ULONGEST second_half_begin, second_half_end;
2085 ULONGEST middle = current_begin + (current_end - current_begin)/2;
2089 first_half_begin = current_begin;
2090 first_half_end = middle;
2091 second_half_begin = middle;
2092 second_half_end = current_end;
2096 first_half_begin = middle;
2097 first_half_end = current_end;
2098 second_half_begin = current_begin;
2099 second_half_end = middle;
2102 xfer = target_read (ops, TARGET_OBJECT_MEMORY, NULL,
2103 buf + (first_half_begin - begin),
2105 first_half_end - first_half_begin);
2107 if (xfer == first_half_end - first_half_begin)
2109 /* This half reads up fine. So, the error must be in the
2111 current_begin = second_half_begin;
2112 current_end = second_half_end;
2116 /* This half is not readable. Because we've tried one byte, we
2117 know some part of this half if actually redable. Go to the next
2118 iteration to divide again and try to read.
2120 We don't handle the other half, because this function only tries
2121 to read a single readable subrange. */
2122 current_begin = first_half_begin;
2123 current_end = first_half_end;
2129 /* The [begin, current_begin) range has been read. */
2131 r.end = current_begin;
2136 /* The [current_end, end) range has been read. */
2137 LONGEST rlen = end - current_end;
2139 r.data = xmalloc (rlen);
2140 memcpy (r.data, buf + current_end - begin, rlen);
2141 r.begin = current_end;
2145 VEC_safe_push(memory_read_result_s, (*result), &r);
2149 free_memory_read_result_vector (void *x)
2151 VEC(memory_read_result_s) *v = x;
2152 memory_read_result_s *current;
2155 for (ix = 0; VEC_iterate (memory_read_result_s, v, ix, current); ++ix)
2157 xfree (current->data);
2159 VEC_free (memory_read_result_s, v);
2162 VEC(memory_read_result_s) *
2163 read_memory_robust (struct target_ops *ops, ULONGEST offset, LONGEST len)
2165 VEC(memory_read_result_s) *result = 0;
2168 while (xfered < len)
2170 struct mem_region *region = lookup_mem_region (offset + xfered);
2173 /* If there is no explicit region, a fake one should be created. */
2174 gdb_assert (region);
2176 if (region->hi == 0)
2177 rlen = len - xfered;
2179 rlen = region->hi - offset;
2181 if (region->attrib.mode == MEM_NONE || region->attrib.mode == MEM_WO)
2183 /* Cannot read this region. Note that we can end up here only
2184 if the region is explicitly marked inaccessible, or
2185 'inaccessible-by-default' is in effect. */
2190 LONGEST to_read = min (len - xfered, rlen);
2191 gdb_byte *buffer = (gdb_byte *)xmalloc (to_read);
2193 LONGEST xfer = target_read (ops, TARGET_OBJECT_MEMORY, NULL,
2194 (gdb_byte *) buffer,
2195 offset + xfered, to_read);
2196 /* Call an observer, notifying them of the xfer progress? */
2199 /* Got an error reading full chunk. See if maybe we can read
2202 read_whatever_is_readable (ops, offset + xfered,
2203 offset + xfered + to_read, &result);
2208 struct memory_read_result r;
2210 r.begin = offset + xfered;
2211 r.end = r.begin + xfer;
2212 VEC_safe_push (memory_read_result_s, result, &r);
2222 /* An alternative to target_write with progress callbacks. */
2225 target_write_with_progress (struct target_ops *ops,
2226 enum target_object object,
2227 const char *annex, const gdb_byte *buf,
2228 ULONGEST offset, LONGEST len,
2229 void (*progress) (ULONGEST, void *), void *baton)
2233 /* Give the progress callback a chance to set up. */
2235 (*progress) (0, baton);
2237 while (xfered < len)
2239 LONGEST xfer = target_write_partial (ops, object, annex,
2240 (gdb_byte *) buf + xfered,
2241 offset + xfered, len - xfered);
2249 (*progress) (xfer, baton);
2257 /* For docs on target_write see target.h. */
2260 target_write (struct target_ops *ops,
2261 enum target_object object,
2262 const char *annex, const gdb_byte *buf,
2263 ULONGEST offset, LONGEST len)
2265 return target_write_with_progress (ops, object, annex, buf, offset, len,
2269 /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return
2270 the size of the transferred data. PADDING additional bytes are
2271 available in *BUF_P. This is a helper function for
2272 target_read_alloc; see the declaration of that function for more
2276 target_read_alloc_1 (struct target_ops *ops, enum target_object object,
2277 const char *annex, gdb_byte **buf_p, int padding)
2279 size_t buf_alloc, buf_pos;
2283 /* This function does not have a length parameter; it reads the
2284 entire OBJECT). Also, it doesn't support objects fetched partly
2285 from one target and partly from another (in a different stratum,
2286 e.g. a core file and an executable). Both reasons make it
2287 unsuitable for reading memory. */
2288 gdb_assert (object != TARGET_OBJECT_MEMORY);
2290 /* Start by reading up to 4K at a time. The target will throttle
2291 this number down if necessary. */
2293 buf = xmalloc (buf_alloc);
2297 n = target_read_partial (ops, object, annex, &buf[buf_pos],
2298 buf_pos, buf_alloc - buf_pos - padding);
2301 /* An error occurred. */
2307 /* Read all there was. */
2317 /* If the buffer is filling up, expand it. */
2318 if (buf_alloc < buf_pos * 2)
2321 buf = xrealloc (buf, buf_alloc);
2328 /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return
2329 the size of the transferred data. See the declaration in "target.h"
2330 function for more information about the return value. */
2333 target_read_alloc (struct target_ops *ops, enum target_object object,
2334 const char *annex, gdb_byte **buf_p)
2336 return target_read_alloc_1 (ops, object, annex, buf_p, 0);
2339 /* Read OBJECT/ANNEX using OPS. The result is NUL-terminated and
2340 returned as a string, allocated using xmalloc. If an error occurs
2341 or the transfer is unsupported, NULL is returned. Empty objects
2342 are returned as allocated but empty strings. A warning is issued
2343 if the result contains any embedded NUL bytes. */
2346 target_read_stralloc (struct target_ops *ops, enum target_object object,
2350 LONGEST transferred;
2352 transferred = target_read_alloc_1 (ops, object, annex, &buffer, 1);
2354 if (transferred < 0)
2357 if (transferred == 0)
2358 return xstrdup ("");
2360 buffer[transferred] = 0;
2361 if (strlen (buffer) < transferred)
2362 warning (_("target object %d, annex %s, "
2363 "contained unexpected null characters"),
2364 (int) object, annex ? annex : "(none)");
2366 return (char *) buffer;
2369 /* Memory transfer methods. */
2372 get_target_memory (struct target_ops *ops, CORE_ADDR addr, gdb_byte *buf,
2375 /* This method is used to read from an alternate, non-current
2376 target. This read must bypass the overlay support (as symbols
2377 don't match this target), and GDB's internal cache (wrong cache
2378 for this target). */
2379 if (target_read (ops, TARGET_OBJECT_RAW_MEMORY, NULL, buf, addr, len)
2381 memory_error (EIO, addr);
2385 get_target_memory_unsigned (struct target_ops *ops, CORE_ADDR addr,
2386 int len, enum bfd_endian byte_order)
2388 gdb_byte buf[sizeof (ULONGEST)];
2390 gdb_assert (len <= sizeof (buf));
2391 get_target_memory (ops, addr, buf, len);
2392 return extract_unsigned_integer (buf, len, byte_order);
2396 target_insert_breakpoint (struct gdbarch *gdbarch,
2397 struct bp_target_info *bp_tgt)
2399 if (!may_insert_breakpoints)
2401 warning (_("May not insert breakpoints"));
2405 return (*current_target.to_insert_breakpoint) (gdbarch, bp_tgt);
2409 target_remove_breakpoint (struct gdbarch *gdbarch,
2410 struct bp_target_info *bp_tgt)
2412 /* This is kind of a weird case to handle, but the permission might
2413 have been changed after breakpoints were inserted - in which case
2414 we should just take the user literally and assume that any
2415 breakpoints should be left in place. */
2416 if (!may_insert_breakpoints)
2418 warning (_("May not remove breakpoints"));
2422 return (*current_target.to_remove_breakpoint) (gdbarch, bp_tgt);
2426 target_info (char *args, int from_tty)
2428 struct target_ops *t;
2429 int has_all_mem = 0;
2431 if (symfile_objfile != NULL)
2432 printf_unfiltered (_("Symbols from \"%s\".\n"), symfile_objfile->name);
2434 for (t = target_stack; t != NULL; t = t->beneath)
2436 if (!(*t->to_has_memory) (t))
2439 if ((int) (t->to_stratum) <= (int) dummy_stratum)
2442 printf_unfiltered (_("\tWhile running this, "
2443 "GDB does not access memory from...\n"));
2444 printf_unfiltered ("%s:\n", t->to_longname);
2445 (t->to_files_info) (t);
2446 has_all_mem = (*t->to_has_all_memory) (t);
2450 /* This function is called before any new inferior is created, e.g.
2451 by running a program, attaching, or connecting to a target.
2452 It cleans up any state from previous invocations which might
2453 change between runs. This is a subset of what target_preopen
2454 resets (things which might change between targets). */
2457 target_pre_inferior (int from_tty)
2459 /* Clear out solib state. Otherwise the solib state of the previous
2460 inferior might have survived and is entirely wrong for the new
2461 target. This has been observed on GNU/Linux using glibc 2.3. How
2473 Cannot access memory at address 0xdeadbeef
2476 /* In some OSs, the shared library list is the same/global/shared
2477 across inferiors. If code is shared between processes, so are
2478 memory regions and features. */
2479 if (!gdbarch_has_global_solist (target_gdbarch))
2481 no_shared_libraries (NULL, from_tty);
2483 invalidate_target_mem_regions ();
2485 target_clear_description ();
2489 /* Callback for iterate_over_inferiors. Gets rid of the given
2493 dispose_inferior (struct inferior *inf, void *args)
2495 struct thread_info *thread;
2497 thread = any_thread_of_process (inf->pid);
2500 switch_to_thread (thread->ptid);
2502 /* Core inferiors actually should be detached, not killed. */
2503 if (target_has_execution)
2506 target_detach (NULL, 0);
2512 /* This is to be called by the open routine before it does
2516 target_preopen (int from_tty)
2520 if (have_inferiors ())
2523 || !have_live_inferiors ()
2524 || query (_("A program is being debugged already. Kill it? ")))
2525 iterate_over_inferiors (dispose_inferior, NULL);
2527 error (_("Program not killed."));
2530 /* Calling target_kill may remove the target from the stack. But if
2531 it doesn't (which seems like a win for UDI), remove it now. */
2532 /* Leave the exec target, though. The user may be switching from a
2533 live process to a core of the same program. */
2534 pop_all_targets_above (file_stratum, 0);
2536 target_pre_inferior (from_tty);
2539 /* Detach a target after doing deferred register stores. */
2542 target_detach (char *args, int from_tty)
2544 struct target_ops* t;
2546 if (gdbarch_has_global_breakpoints (target_gdbarch))
2547 /* Don't remove global breakpoints here. They're removed on
2548 disconnection from the target. */
2551 /* If we're in breakpoints-always-inserted mode, have to remove
2552 them before detaching. */
2553 remove_breakpoints_pid (PIDGET (inferior_ptid));
2555 prepare_for_detach ();
2557 for (t = current_target.beneath; t != NULL; t = t->beneath)
2559 if (t->to_detach != NULL)
2561 t->to_detach (t, args, from_tty);
2563 fprintf_unfiltered (gdb_stdlog, "target_detach (%s, %d)\n",
2569 internal_error (__FILE__, __LINE__, _("could not find a target to detach"));
2573 target_disconnect (char *args, int from_tty)
2575 struct target_ops *t;
2577 /* If we're in breakpoints-always-inserted mode or if breakpoints
2578 are global across processes, we have to remove them before
2580 remove_breakpoints ();
2582 for (t = current_target.beneath; t != NULL; t = t->beneath)
2583 if (t->to_disconnect != NULL)
2586 fprintf_unfiltered (gdb_stdlog, "target_disconnect (%s, %d)\n",
2588 t->to_disconnect (t, args, from_tty);
2596 target_wait (ptid_t ptid, struct target_waitstatus *status, int options)
2598 struct target_ops *t;
2600 for (t = current_target.beneath; t != NULL; t = t->beneath)
2602 if (t->to_wait != NULL)
2604 ptid_t retval = (*t->to_wait) (t, ptid, status, options);
2608 char *status_string;
2610 status_string = target_waitstatus_to_string (status);
2611 fprintf_unfiltered (gdb_stdlog,
2612 "target_wait (%d, status) = %d, %s\n",
2613 PIDGET (ptid), PIDGET (retval),
2615 xfree (status_string);
2626 target_pid_to_str (ptid_t ptid)
2628 struct target_ops *t;
2630 for (t = current_target.beneath; t != NULL; t = t->beneath)
2632 if (t->to_pid_to_str != NULL)
2633 return (*t->to_pid_to_str) (t, ptid);
2636 return normal_pid_to_str (ptid);
2640 target_thread_name (struct thread_info *info)
2642 struct target_ops *t;
2644 for (t = current_target.beneath; t != NULL; t = t->beneath)
2646 if (t->to_thread_name != NULL)
2647 return (*t->to_thread_name) (info);
2654 target_resume (ptid_t ptid, int step, enum target_signal signal)
2656 struct target_ops *t;
2658 target_dcache_invalidate ();
2660 for (t = current_target.beneath; t != NULL; t = t->beneath)
2662 if (t->to_resume != NULL)
2664 t->to_resume (t, ptid, step, signal);
2666 fprintf_unfiltered (gdb_stdlog, "target_resume (%d, %s, %s)\n",
2668 step ? "step" : "continue",
2669 target_signal_to_name (signal));
2671 registers_changed_ptid (ptid);
2672 set_executing (ptid, 1);
2673 set_running (ptid, 1);
2674 clear_inline_frame_state (ptid);
2683 target_pass_signals (int numsigs, unsigned char *pass_signals)
2685 struct target_ops *t;
2687 for (t = current_target.beneath; t != NULL; t = t->beneath)
2689 if (t->to_pass_signals != NULL)
2695 fprintf_unfiltered (gdb_stdlog, "target_pass_signals (%d, {",
2698 for (i = 0; i < numsigs; i++)
2699 if (pass_signals[i])
2700 fprintf_unfiltered (gdb_stdlog, " %s",
2701 target_signal_to_name (i));
2703 fprintf_unfiltered (gdb_stdlog, " })\n");
2706 (*t->to_pass_signals) (numsigs, pass_signals);
2712 /* Look through the list of possible targets for a target that can
2716 target_follow_fork (int follow_child)
2718 struct target_ops *t;
2720 for (t = current_target.beneath; t != NULL; t = t->beneath)
2722 if (t->to_follow_fork != NULL)
2724 int retval = t->to_follow_fork (t, follow_child);
2727 fprintf_unfiltered (gdb_stdlog, "target_follow_fork (%d) = %d\n",
2728 follow_child, retval);
2733 /* Some target returned a fork event, but did not know how to follow it. */
2734 internal_error (__FILE__, __LINE__,
2735 _("could not find a target to follow fork"));
2739 target_mourn_inferior (void)
2741 struct target_ops *t;
2743 for (t = current_target.beneath; t != NULL; t = t->beneath)
2745 if (t->to_mourn_inferior != NULL)
2747 t->to_mourn_inferior (t);
2749 fprintf_unfiltered (gdb_stdlog, "target_mourn_inferior ()\n");
2751 /* We no longer need to keep handles on any of the object files.
2752 Make sure to release them to avoid unnecessarily locking any
2753 of them while we're not actually debugging. */
2754 bfd_cache_close_all ();
2760 internal_error (__FILE__, __LINE__,
2761 _("could not find a target to follow mourn inferior"));
2764 /* Look for a target which can describe architectural features, starting
2765 from TARGET. If we find one, return its description. */
2767 const struct target_desc *
2768 target_read_description (struct target_ops *target)
2770 struct target_ops *t;
2772 for (t = target; t != NULL; t = t->beneath)
2773 if (t->to_read_description != NULL)
2775 const struct target_desc *tdesc;
2777 tdesc = t->to_read_description (t);
2785 /* The default implementation of to_search_memory.
2786 This implements a basic search of memory, reading target memory and
2787 performing the search here (as opposed to performing the search in on the
2788 target side with, for example, gdbserver). */
2791 simple_search_memory (struct target_ops *ops,
2792 CORE_ADDR start_addr, ULONGEST search_space_len,
2793 const gdb_byte *pattern, ULONGEST pattern_len,
2794 CORE_ADDR *found_addrp)
2796 /* NOTE: also defined in find.c testcase. */
2797 #define SEARCH_CHUNK_SIZE 16000
2798 const unsigned chunk_size = SEARCH_CHUNK_SIZE;
2799 /* Buffer to hold memory contents for searching. */
2800 gdb_byte *search_buf;
2801 unsigned search_buf_size;
2802 struct cleanup *old_cleanups;
2804 search_buf_size = chunk_size + pattern_len - 1;
2806 /* No point in trying to allocate a buffer larger than the search space. */
2807 if (search_space_len < search_buf_size)
2808 search_buf_size = search_space_len;
2810 search_buf = malloc (search_buf_size);
2811 if (search_buf == NULL)
2812 error (_("Unable to allocate memory to perform the search."));
2813 old_cleanups = make_cleanup (free_current_contents, &search_buf);
2815 /* Prime the search buffer. */
2817 if (target_read (ops, TARGET_OBJECT_MEMORY, NULL,
2818 search_buf, start_addr, search_buf_size) != search_buf_size)
2820 warning (_("Unable to access target memory at %s, halting search."),
2821 hex_string (start_addr));
2822 do_cleanups (old_cleanups);
2826 /* Perform the search.
2828 The loop is kept simple by allocating [N + pattern-length - 1] bytes.
2829 When we've scanned N bytes we copy the trailing bytes to the start and
2830 read in another N bytes. */
2832 while (search_space_len >= pattern_len)
2834 gdb_byte *found_ptr;
2835 unsigned nr_search_bytes = min (search_space_len, search_buf_size);
2837 found_ptr = memmem (search_buf, nr_search_bytes,
2838 pattern, pattern_len);
2840 if (found_ptr != NULL)
2842 CORE_ADDR found_addr = start_addr + (found_ptr - search_buf);
2844 *found_addrp = found_addr;
2845 do_cleanups (old_cleanups);
2849 /* Not found in this chunk, skip to next chunk. */
2851 /* Don't let search_space_len wrap here, it's unsigned. */
2852 if (search_space_len >= chunk_size)
2853 search_space_len -= chunk_size;
2855 search_space_len = 0;
2857 if (search_space_len >= pattern_len)
2859 unsigned keep_len = search_buf_size - chunk_size;
2860 CORE_ADDR read_addr = start_addr + chunk_size + keep_len;
2863 /* Copy the trailing part of the previous iteration to the front
2864 of the buffer for the next iteration. */
2865 gdb_assert (keep_len == pattern_len - 1);
2866 memcpy (search_buf, search_buf + chunk_size, keep_len);
2868 nr_to_read = min (search_space_len - keep_len, chunk_size);
2870 if (target_read (ops, TARGET_OBJECT_MEMORY, NULL,
2871 search_buf + keep_len, read_addr,
2872 nr_to_read) != nr_to_read)
2874 warning (_("Unable to access target "
2875 "memory at %s, halting search."),
2876 hex_string (read_addr));
2877 do_cleanups (old_cleanups);
2881 start_addr += chunk_size;
2887 do_cleanups (old_cleanups);
2891 /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the
2892 sequence of bytes in PATTERN with length PATTERN_LEN.
2894 The result is 1 if found, 0 if not found, and -1 if there was an error
2895 requiring halting of the search (e.g. memory read error).
2896 If the pattern is found the address is recorded in FOUND_ADDRP. */
2899 target_search_memory (CORE_ADDR start_addr, ULONGEST search_space_len,
2900 const gdb_byte *pattern, ULONGEST pattern_len,
2901 CORE_ADDR *found_addrp)
2903 struct target_ops *t;
2906 /* We don't use INHERIT to set current_target.to_search_memory,
2907 so we have to scan the target stack and handle targetdebug
2911 fprintf_unfiltered (gdb_stdlog, "target_search_memory (%s, ...)\n",
2912 hex_string (start_addr));
2914 for (t = current_target.beneath; t != NULL; t = t->beneath)
2915 if (t->to_search_memory != NULL)
2920 found = t->to_search_memory (t, start_addr, search_space_len,
2921 pattern, pattern_len, found_addrp);
2925 /* If a special version of to_search_memory isn't available, use the
2927 found = simple_search_memory (current_target.beneath,
2928 start_addr, search_space_len,
2929 pattern, pattern_len, found_addrp);
2933 fprintf_unfiltered (gdb_stdlog, " = %d\n", found);
2938 /* Look through the currently pushed targets. If none of them will
2939 be able to restart the currently running process, issue an error
2943 target_require_runnable (void)
2945 struct target_ops *t;
2947 for (t = target_stack; t != NULL; t = t->beneath)
2949 /* If this target knows how to create a new program, then
2950 assume we will still be able to after killing the current
2951 one. Either killing and mourning will not pop T, or else
2952 find_default_run_target will find it again. */
2953 if (t->to_create_inferior != NULL)
2956 /* Do not worry about thread_stratum targets that can not
2957 create inferiors. Assume they will be pushed again if
2958 necessary, and continue to the process_stratum. */
2959 if (t->to_stratum == thread_stratum
2960 || t->to_stratum == arch_stratum)
2963 error (_("The \"%s\" target does not support \"run\". "
2964 "Try \"help target\" or \"continue\"."),
2968 /* This function is only called if the target is running. In that
2969 case there should have been a process_stratum target and it
2970 should either know how to create inferiors, or not... */
2971 internal_error (__FILE__, __LINE__, _("No targets found"));
2974 /* Look through the list of possible targets for a target that can
2975 execute a run or attach command without any other data. This is
2976 used to locate the default process stratum.
2978 If DO_MESG is not NULL, the result is always valid (error() is
2979 called for errors); else, return NULL on error. */
2981 static struct target_ops *
2982 find_default_run_target (char *do_mesg)
2984 struct target_ops **t;
2985 struct target_ops *runable = NULL;
2990 for (t = target_structs; t < target_structs + target_struct_size;
2993 if ((*t)->to_can_run && target_can_run (*t))
3003 error (_("Don't know how to %s. Try \"help target\"."), do_mesg);
3012 find_default_attach (struct target_ops *ops, char *args, int from_tty)
3014 struct target_ops *t;
3016 t = find_default_run_target ("attach");
3017 (t->to_attach) (t, args, from_tty);
3022 find_default_create_inferior (struct target_ops *ops,
3023 char *exec_file, char *allargs, char **env,
3026 struct target_ops *t;
3028 t = find_default_run_target ("run");
3029 (t->to_create_inferior) (t, exec_file, allargs, env, from_tty);
3034 find_default_can_async_p (void)
3036 struct target_ops *t;
3038 /* This may be called before the target is pushed on the stack;
3039 look for the default process stratum. If there's none, gdb isn't
3040 configured with a native debugger, and target remote isn't
3042 t = find_default_run_target (NULL);
3043 if (t && t->to_can_async_p)
3044 return (t->to_can_async_p) ();
3049 find_default_is_async_p (void)
3051 struct target_ops *t;
3053 /* This may be called before the target is pushed on the stack;
3054 look for the default process stratum. If there's none, gdb isn't
3055 configured with a native debugger, and target remote isn't
3057 t = find_default_run_target (NULL);
3058 if (t && t->to_is_async_p)
3059 return (t->to_is_async_p) ();
3064 find_default_supports_non_stop (void)
3066 struct target_ops *t;
3068 t = find_default_run_target (NULL);
3069 if (t && t->to_supports_non_stop)
3070 return (t->to_supports_non_stop) ();
3075 target_supports_non_stop (void)
3077 struct target_ops *t;
3079 for (t = ¤t_target; t != NULL; t = t->beneath)
3080 if (t->to_supports_non_stop)
3081 return t->to_supports_non_stop ();
3087 find_default_supports_disable_randomization (void)
3089 struct target_ops *t;
3091 t = find_default_run_target (NULL);
3092 if (t && t->to_supports_disable_randomization)
3093 return (t->to_supports_disable_randomization) ();
3098 target_supports_disable_randomization (void)
3100 struct target_ops *t;
3102 for (t = ¤t_target; t != NULL; t = t->beneath)
3103 if (t->to_supports_disable_randomization)
3104 return t->to_supports_disable_randomization ();
3110 target_get_osdata (const char *type)
3112 struct target_ops *t;
3114 /* If we're already connected to something that can get us OS
3115 related data, use it. Otherwise, try using the native
3117 if (current_target.to_stratum >= process_stratum)
3118 t = current_target.beneath;
3120 t = find_default_run_target ("get OS data");
3125 return target_read_stralloc (t, TARGET_OBJECT_OSDATA, type);
3128 /* Determine the current address space of thread PTID. */
3130 struct address_space *
3131 target_thread_address_space (ptid_t ptid)
3133 struct address_space *aspace;
3134 struct inferior *inf;
3135 struct target_ops *t;
3137 for (t = current_target.beneath; t != NULL; t = t->beneath)
3139 if (t->to_thread_address_space != NULL)
3141 aspace = t->to_thread_address_space (t, ptid);
3142 gdb_assert (aspace);
3145 fprintf_unfiltered (gdb_stdlog,
3146 "target_thread_address_space (%s) = %d\n",
3147 target_pid_to_str (ptid),
3148 address_space_num (aspace));
3153 /* Fall-back to the "main" address space of the inferior. */
3154 inf = find_inferior_pid (ptid_get_pid (ptid));
3156 if (inf == NULL || inf->aspace == NULL)
3157 internal_error (__FILE__, __LINE__,
3158 _("Can't determine the current "
3159 "address space of thread %s\n"),
3160 target_pid_to_str (ptid));
3166 default_region_ok_for_hw_watchpoint (CORE_ADDR addr, int len)
3168 return (len <= gdbarch_ptr_bit (target_gdbarch) / TARGET_CHAR_BIT);
3172 default_watchpoint_addr_within_range (struct target_ops *target,
3174 CORE_ADDR start, int length)
3176 return addr >= start && addr < start + length;
3179 static struct gdbarch *
3180 default_thread_architecture (struct target_ops *ops, ptid_t ptid)
3182 return target_gdbarch;
3198 return_minus_one (void)
3203 /* Find a single runnable target in the stack and return it. If for
3204 some reason there is more than one, return NULL. */
3207 find_run_target (void)
3209 struct target_ops **t;
3210 struct target_ops *runable = NULL;
3215 for (t = target_structs; t < target_structs + target_struct_size; ++t)
3217 if ((*t)->to_can_run && target_can_run (*t))
3224 return (count == 1 ? runable : NULL);
3228 * Find the next target down the stack from the specified target.
3232 find_target_beneath (struct target_ops *t)
3238 /* The inferior process has died. Long live the inferior! */
3241 generic_mourn_inferior (void)
3245 ptid = inferior_ptid;
3246 inferior_ptid = null_ptid;
3248 if (!ptid_equal (ptid, null_ptid))
3250 int pid = ptid_get_pid (ptid);
3251 exit_inferior (pid);
3254 breakpoint_init_inferior (inf_exited);
3255 registers_changed ();
3257 reopen_exec_file ();
3258 reinit_frame_cache ();
3260 if (deprecated_detach_hook)
3261 deprecated_detach_hook ();
3264 /* Helper function for child_wait and the derivatives of child_wait.
3265 HOSTSTATUS is the waitstatus from wait() or the equivalent; store our
3266 translation of that in OURSTATUS. */
3268 store_waitstatus (struct target_waitstatus *ourstatus, int hoststatus)
3270 if (WIFEXITED (hoststatus))
3272 ourstatus->kind = TARGET_WAITKIND_EXITED;
3273 ourstatus->value.integer = WEXITSTATUS (hoststatus);
3275 else if (!WIFSTOPPED (hoststatus))
3277 ourstatus->kind = TARGET_WAITKIND_SIGNALLED;
3278 ourstatus->value.sig = target_signal_from_host (WTERMSIG (hoststatus));
3282 ourstatus->kind = TARGET_WAITKIND_STOPPED;
3283 ourstatus->value.sig = target_signal_from_host (WSTOPSIG (hoststatus));
3287 /* Convert a normal process ID to a string. Returns the string in a
3291 normal_pid_to_str (ptid_t ptid)
3293 static char buf[32];
3295 xsnprintf (buf, sizeof buf, "process %d", ptid_get_pid (ptid));
3300 dummy_pid_to_str (struct target_ops *ops, ptid_t ptid)
3302 return normal_pid_to_str (ptid);
3305 /* Error-catcher for target_find_memory_regions. */
3307 dummy_find_memory_regions (find_memory_region_ftype ignore1, void *ignore2)
3309 error (_("Command not implemented for this target."));
3313 /* Error-catcher for target_make_corefile_notes. */
3315 dummy_make_corefile_notes (bfd *ignore1, int *ignore2)
3317 error (_("Command not implemented for this target."));
3321 /* Error-catcher for target_get_bookmark. */
3323 dummy_get_bookmark (char *ignore1, int ignore2)
3329 /* Error-catcher for target_goto_bookmark. */
3331 dummy_goto_bookmark (gdb_byte *ignore, int from_tty)
3336 /* Set up the handful of non-empty slots needed by the dummy target
3340 init_dummy_target (void)
3342 dummy_target.to_shortname = "None";
3343 dummy_target.to_longname = "None";
3344 dummy_target.to_doc = "";
3345 dummy_target.to_attach = find_default_attach;
3346 dummy_target.to_detach =
3347 (void (*)(struct target_ops *, char *, int))target_ignore;
3348 dummy_target.to_create_inferior = find_default_create_inferior;
3349 dummy_target.to_can_async_p = find_default_can_async_p;
3350 dummy_target.to_is_async_p = find_default_is_async_p;
3351 dummy_target.to_supports_non_stop = find_default_supports_non_stop;
3352 dummy_target.to_supports_disable_randomization
3353 = find_default_supports_disable_randomization;
3354 dummy_target.to_pid_to_str = dummy_pid_to_str;
3355 dummy_target.to_stratum = dummy_stratum;
3356 dummy_target.to_find_memory_regions = dummy_find_memory_regions;
3357 dummy_target.to_make_corefile_notes = dummy_make_corefile_notes;
3358 dummy_target.to_get_bookmark = dummy_get_bookmark;
3359 dummy_target.to_goto_bookmark = dummy_goto_bookmark;
3360 dummy_target.to_xfer_partial = default_xfer_partial;
3361 dummy_target.to_has_all_memory = (int (*) (struct target_ops *)) return_zero;
3362 dummy_target.to_has_memory = (int (*) (struct target_ops *)) return_zero;
3363 dummy_target.to_has_stack = (int (*) (struct target_ops *)) return_zero;
3364 dummy_target.to_has_registers = (int (*) (struct target_ops *)) return_zero;
3365 dummy_target.to_has_execution
3366 = (int (*) (struct target_ops *, ptid_t)) return_zero;
3367 dummy_target.to_stopped_by_watchpoint = return_zero;
3368 dummy_target.to_stopped_data_address =
3369 (int (*) (struct target_ops *, CORE_ADDR *)) return_zero;
3370 dummy_target.to_magic = OPS_MAGIC;
3374 debug_to_open (char *args, int from_tty)
3376 debug_target.to_open (args, from_tty);
3378 fprintf_unfiltered (gdb_stdlog, "target_open (%s, %d)\n", args, from_tty);
3382 target_close (struct target_ops *targ, int quitting)
3384 if (targ->to_xclose != NULL)
3385 targ->to_xclose (targ, quitting);
3386 else if (targ->to_close != NULL)
3387 targ->to_close (quitting);
3390 fprintf_unfiltered (gdb_stdlog, "target_close (%d)\n", quitting);
3394 target_attach (char *args, int from_tty)
3396 struct target_ops *t;
3398 for (t = current_target.beneath; t != NULL; t = t->beneath)
3400 if (t->to_attach != NULL)
3402 t->to_attach (t, args, from_tty);
3404 fprintf_unfiltered (gdb_stdlog, "target_attach (%s, %d)\n",
3410 internal_error (__FILE__, __LINE__,
3411 _("could not find a target to attach"));
3415 target_thread_alive (ptid_t ptid)
3417 struct target_ops *t;
3419 for (t = current_target.beneath; t != NULL; t = t->beneath)
3421 if (t->to_thread_alive != NULL)
3425 retval = t->to_thread_alive (t, ptid);
3427 fprintf_unfiltered (gdb_stdlog, "target_thread_alive (%d) = %d\n",
3428 PIDGET (ptid), retval);
3438 target_find_new_threads (void)
3440 struct target_ops *t;
3442 for (t = current_target.beneath; t != NULL; t = t->beneath)
3444 if (t->to_find_new_threads != NULL)
3446 t->to_find_new_threads (t);
3448 fprintf_unfiltered (gdb_stdlog, "target_find_new_threads ()\n");
3456 target_stop (ptid_t ptid)
3460 warning (_("May not interrupt or stop the target, ignoring attempt"));
3464 (*current_target.to_stop) (ptid);
3468 debug_to_post_attach (int pid)
3470 debug_target.to_post_attach (pid);
3472 fprintf_unfiltered (gdb_stdlog, "target_post_attach (%d)\n", pid);
3475 /* Return a pretty printed form of target_waitstatus.
3476 Space for the result is malloc'd, caller must free. */
3479 target_waitstatus_to_string (const struct target_waitstatus *ws)
3481 const char *kind_str = "status->kind = ";
3485 case TARGET_WAITKIND_EXITED:
3486 return xstrprintf ("%sexited, status = %d",
3487 kind_str, ws->value.integer);
3488 case TARGET_WAITKIND_STOPPED:
3489 return xstrprintf ("%sstopped, signal = %s",
3490 kind_str, target_signal_to_name (ws->value.sig));
3491 case TARGET_WAITKIND_SIGNALLED:
3492 return xstrprintf ("%ssignalled, signal = %s",
3493 kind_str, target_signal_to_name (ws->value.sig));
3494 case TARGET_WAITKIND_LOADED:
3495 return xstrprintf ("%sloaded", kind_str);
3496 case TARGET_WAITKIND_FORKED:
3497 return xstrprintf ("%sforked", kind_str);
3498 case TARGET_WAITKIND_VFORKED:
3499 return xstrprintf ("%svforked", kind_str);
3500 case TARGET_WAITKIND_EXECD:
3501 return xstrprintf ("%sexecd", kind_str);
3502 case TARGET_WAITKIND_SYSCALL_ENTRY:
3503 return xstrprintf ("%sentered syscall", kind_str);
3504 case TARGET_WAITKIND_SYSCALL_RETURN:
3505 return xstrprintf ("%sexited syscall", kind_str);
3506 case TARGET_WAITKIND_SPURIOUS:
3507 return xstrprintf ("%sspurious", kind_str);
3508 case TARGET_WAITKIND_IGNORE:
3509 return xstrprintf ("%signore", kind_str);
3510 case TARGET_WAITKIND_NO_HISTORY:
3511 return xstrprintf ("%sno-history", kind_str);
3512 case TARGET_WAITKIND_NO_RESUMED:
3513 return xstrprintf ("%sno-resumed", kind_str);
3515 return xstrprintf ("%sunknown???", kind_str);
3520 debug_print_register (const char * func,
3521 struct regcache *regcache, int regno)
3523 struct gdbarch *gdbarch = get_regcache_arch (regcache);
3525 fprintf_unfiltered (gdb_stdlog, "%s ", func);
3526 if (regno >= 0 && regno < gdbarch_num_regs (gdbarch)
3527 && gdbarch_register_name (gdbarch, regno) != NULL
3528 && gdbarch_register_name (gdbarch, regno)[0] != '\0')
3529 fprintf_unfiltered (gdb_stdlog, "(%s)",
3530 gdbarch_register_name (gdbarch, regno));
3532 fprintf_unfiltered (gdb_stdlog, "(%d)", regno);
3533 if (regno >= 0 && regno < gdbarch_num_regs (gdbarch))
3535 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
3536 int i, size = register_size (gdbarch, regno);
3537 unsigned char buf[MAX_REGISTER_SIZE];
3539 regcache_raw_collect (regcache, regno, buf);
3540 fprintf_unfiltered (gdb_stdlog, " = ");
3541 for (i = 0; i < size; i++)
3543 fprintf_unfiltered (gdb_stdlog, "%02x", buf[i]);
3545 if (size <= sizeof (LONGEST))
3547 ULONGEST val = extract_unsigned_integer (buf, size, byte_order);
3549 fprintf_unfiltered (gdb_stdlog, " %s %s",
3550 core_addr_to_string_nz (val), plongest (val));
3553 fprintf_unfiltered (gdb_stdlog, "\n");
3557 target_fetch_registers (struct regcache *regcache, int regno)
3559 struct target_ops *t;
3561 for (t = current_target.beneath; t != NULL; t = t->beneath)
3563 if (t->to_fetch_registers != NULL)
3565 t->to_fetch_registers (t, regcache, regno);
3567 debug_print_register ("target_fetch_registers", regcache, regno);
3574 target_store_registers (struct regcache *regcache, int regno)
3576 struct target_ops *t;
3578 if (!may_write_registers)
3579 error (_("Writing to registers is not allowed (regno %d)"), regno);
3581 for (t = current_target.beneath; t != NULL; t = t->beneath)
3583 if (t->to_store_registers != NULL)
3585 t->to_store_registers (t, regcache, regno);
3588 debug_print_register ("target_store_registers", regcache, regno);
3598 target_core_of_thread (ptid_t ptid)
3600 struct target_ops *t;
3602 for (t = current_target.beneath; t != NULL; t = t->beneath)
3604 if (t->to_core_of_thread != NULL)
3606 int retval = t->to_core_of_thread (t, ptid);
3609 fprintf_unfiltered (gdb_stdlog,
3610 "target_core_of_thread (%d) = %d\n",
3611 PIDGET (ptid), retval);
3620 target_verify_memory (const gdb_byte *data, CORE_ADDR memaddr, ULONGEST size)
3622 struct target_ops *t;
3624 for (t = current_target.beneath; t != NULL; t = t->beneath)
3626 if (t->to_verify_memory != NULL)
3628 int retval = t->to_verify_memory (t, data, memaddr, size);
3631 fprintf_unfiltered (gdb_stdlog,
3632 "target_verify_memory (%s, %s) = %d\n",
3633 paddress (target_gdbarch, memaddr),
3643 /* The documentation for this function is in its prototype declaration in
3647 target_insert_mask_watchpoint (CORE_ADDR addr, CORE_ADDR mask, int rw)
3649 struct target_ops *t;
3651 for (t = current_target.beneath; t != NULL; t = t->beneath)
3652 if (t->to_insert_mask_watchpoint != NULL)
3656 ret = t->to_insert_mask_watchpoint (t, addr, mask, rw);
3659 fprintf_unfiltered (gdb_stdlog, "\
3660 target_insert_mask_watchpoint (%s, %s, %d) = %d\n",
3661 core_addr_to_string (addr),
3662 core_addr_to_string (mask), rw, ret);
3670 /* The documentation for this function is in its prototype declaration in
3674 target_remove_mask_watchpoint (CORE_ADDR addr, CORE_ADDR mask, int rw)
3676 struct target_ops *t;
3678 for (t = current_target.beneath; t != NULL; t = t->beneath)
3679 if (t->to_remove_mask_watchpoint != NULL)
3683 ret = t->to_remove_mask_watchpoint (t, addr, mask, rw);
3686 fprintf_unfiltered (gdb_stdlog, "\
3687 target_remove_mask_watchpoint (%s, %s, %d) = %d\n",
3688 core_addr_to_string (addr),
3689 core_addr_to_string (mask), rw, ret);
3697 /* The documentation for this function is in its prototype declaration
3701 target_masked_watch_num_registers (CORE_ADDR addr, CORE_ADDR mask)
3703 struct target_ops *t;
3705 for (t = current_target.beneath; t != NULL; t = t->beneath)
3706 if (t->to_masked_watch_num_registers != NULL)
3707 return t->to_masked_watch_num_registers (t, addr, mask);
3712 /* The documentation for this function is in its prototype declaration
3716 target_ranged_break_num_registers (void)
3718 struct target_ops *t;
3720 for (t = current_target.beneath; t != NULL; t = t->beneath)
3721 if (t->to_ranged_break_num_registers != NULL)
3722 return t->to_ranged_break_num_registers (t);
3728 debug_to_prepare_to_store (struct regcache *regcache)
3730 debug_target.to_prepare_to_store (regcache);
3732 fprintf_unfiltered (gdb_stdlog, "target_prepare_to_store ()\n");
3736 deprecated_debug_xfer_memory (CORE_ADDR memaddr, bfd_byte *myaddr, int len,
3737 int write, struct mem_attrib *attrib,
3738 struct target_ops *target)
3742 retval = debug_target.deprecated_xfer_memory (memaddr, myaddr, len, write,
3745 fprintf_unfiltered (gdb_stdlog,
3746 "target_xfer_memory (%s, xxx, %d, %s, xxx) = %d",
3747 paddress (target_gdbarch, memaddr), len,
3748 write ? "write" : "read", retval);
3754 fputs_unfiltered (", bytes =", gdb_stdlog);
3755 for (i = 0; i < retval; i++)
3757 if ((((intptr_t) &(myaddr[i])) & 0xf) == 0)
3759 if (targetdebug < 2 && i > 0)
3761 fprintf_unfiltered (gdb_stdlog, " ...");
3764 fprintf_unfiltered (gdb_stdlog, "\n");
3767 fprintf_unfiltered (gdb_stdlog, " %02x", myaddr[i] & 0xff);
3771 fputc_unfiltered ('\n', gdb_stdlog);
3777 debug_to_files_info (struct target_ops *target)
3779 debug_target.to_files_info (target);
3781 fprintf_unfiltered (gdb_stdlog, "target_files_info (xxx)\n");
3785 debug_to_insert_breakpoint (struct gdbarch *gdbarch,
3786 struct bp_target_info *bp_tgt)
3790 retval = debug_target.to_insert_breakpoint (gdbarch, bp_tgt);
3792 fprintf_unfiltered (gdb_stdlog,
3793 "target_insert_breakpoint (%s, xxx) = %ld\n",
3794 core_addr_to_string (bp_tgt->placed_address),
3795 (unsigned long) retval);
3800 debug_to_remove_breakpoint (struct gdbarch *gdbarch,
3801 struct bp_target_info *bp_tgt)
3805 retval = debug_target.to_remove_breakpoint (gdbarch, bp_tgt);
3807 fprintf_unfiltered (gdb_stdlog,
3808 "target_remove_breakpoint (%s, xxx) = %ld\n",
3809 core_addr_to_string (bp_tgt->placed_address),
3810 (unsigned long) retval);
3815 debug_to_can_use_hw_breakpoint (int type, int cnt, int from_tty)
3819 retval = debug_target.to_can_use_hw_breakpoint (type, cnt, from_tty);
3821 fprintf_unfiltered (gdb_stdlog,
3822 "target_can_use_hw_breakpoint (%ld, %ld, %ld) = %ld\n",
3823 (unsigned long) type,
3824 (unsigned long) cnt,
3825 (unsigned long) from_tty,
3826 (unsigned long) retval);
3831 debug_to_region_ok_for_hw_watchpoint (CORE_ADDR addr, int len)
3835 retval = debug_target.to_region_ok_for_hw_watchpoint (addr, len);
3837 fprintf_unfiltered (gdb_stdlog,
3838 "target_region_ok_for_hw_watchpoint (%s, %ld) = %s\n",
3839 core_addr_to_string (addr), (unsigned long) len,
3840 core_addr_to_string (retval));
3845 debug_to_can_accel_watchpoint_condition (CORE_ADDR addr, int len, int rw,
3846 struct expression *cond)
3850 retval = debug_target.to_can_accel_watchpoint_condition (addr, len,
3853 fprintf_unfiltered (gdb_stdlog,
3854 "target_can_accel_watchpoint_condition "
3855 "(%s, %d, %d, %s) = %ld\n",
3856 core_addr_to_string (addr), len, rw,
3857 host_address_to_string (cond), (unsigned long) retval);
3862 debug_to_stopped_by_watchpoint (void)
3866 retval = debug_target.to_stopped_by_watchpoint ();
3868 fprintf_unfiltered (gdb_stdlog,
3869 "target_stopped_by_watchpoint () = %ld\n",
3870 (unsigned long) retval);
3875 debug_to_stopped_data_address (struct target_ops *target, CORE_ADDR *addr)
3879 retval = debug_target.to_stopped_data_address (target, addr);
3881 fprintf_unfiltered (gdb_stdlog,
3882 "target_stopped_data_address ([%s]) = %ld\n",
3883 core_addr_to_string (*addr),
3884 (unsigned long)retval);
3889 debug_to_watchpoint_addr_within_range (struct target_ops *target,
3891 CORE_ADDR start, int length)
3895 retval = debug_target.to_watchpoint_addr_within_range (target, addr,
3898 fprintf_filtered (gdb_stdlog,
3899 "target_watchpoint_addr_within_range (%s, %s, %d) = %d\n",
3900 core_addr_to_string (addr), core_addr_to_string (start),
3906 debug_to_insert_hw_breakpoint (struct gdbarch *gdbarch,
3907 struct bp_target_info *bp_tgt)
3911 retval = debug_target.to_insert_hw_breakpoint (gdbarch, bp_tgt);
3913 fprintf_unfiltered (gdb_stdlog,
3914 "target_insert_hw_breakpoint (%s, xxx) = %ld\n",
3915 core_addr_to_string (bp_tgt->placed_address),
3916 (unsigned long) retval);
3921 debug_to_remove_hw_breakpoint (struct gdbarch *gdbarch,
3922 struct bp_target_info *bp_tgt)
3926 retval = debug_target.to_remove_hw_breakpoint (gdbarch, bp_tgt);
3928 fprintf_unfiltered (gdb_stdlog,
3929 "target_remove_hw_breakpoint (%s, xxx) = %ld\n",
3930 core_addr_to_string (bp_tgt->placed_address),
3931 (unsigned long) retval);
3936 debug_to_insert_watchpoint (CORE_ADDR addr, int len, int type,
3937 struct expression *cond)
3941 retval = debug_target.to_insert_watchpoint (addr, len, type, cond);
3943 fprintf_unfiltered (gdb_stdlog,
3944 "target_insert_watchpoint (%s, %d, %d, %s) = %ld\n",
3945 core_addr_to_string (addr), len, type,
3946 host_address_to_string (cond), (unsigned long) retval);
3951 debug_to_remove_watchpoint (CORE_ADDR addr, int len, int type,
3952 struct expression *cond)
3956 retval = debug_target.to_remove_watchpoint (addr, len, type, cond);
3958 fprintf_unfiltered (gdb_stdlog,
3959 "target_remove_watchpoint (%s, %d, %d, %s) = %ld\n",
3960 core_addr_to_string (addr), len, type,
3961 host_address_to_string (cond), (unsigned long) retval);
3966 debug_to_terminal_init (void)
3968 debug_target.to_terminal_init ();
3970 fprintf_unfiltered (gdb_stdlog, "target_terminal_init ()\n");
3974 debug_to_terminal_inferior (void)
3976 debug_target.to_terminal_inferior ();
3978 fprintf_unfiltered (gdb_stdlog, "target_terminal_inferior ()\n");
3982 debug_to_terminal_ours_for_output (void)
3984 debug_target.to_terminal_ours_for_output ();
3986 fprintf_unfiltered (gdb_stdlog, "target_terminal_ours_for_output ()\n");
3990 debug_to_terminal_ours (void)
3992 debug_target.to_terminal_ours ();
3994 fprintf_unfiltered (gdb_stdlog, "target_terminal_ours ()\n");
3998 debug_to_terminal_save_ours (void)
4000 debug_target.to_terminal_save_ours ();
4002 fprintf_unfiltered (gdb_stdlog, "target_terminal_save_ours ()\n");
4006 debug_to_terminal_info (char *arg, int from_tty)
4008 debug_target.to_terminal_info (arg, from_tty);
4010 fprintf_unfiltered (gdb_stdlog, "target_terminal_info (%s, %d)\n", arg,
4015 debug_to_load (char *args, int from_tty)
4017 debug_target.to_load (args, from_tty);
4019 fprintf_unfiltered (gdb_stdlog, "target_load (%s, %d)\n", args, from_tty);
4023 debug_to_post_startup_inferior (ptid_t ptid)
4025 debug_target.to_post_startup_inferior (ptid);
4027 fprintf_unfiltered (gdb_stdlog, "target_post_startup_inferior (%d)\n",
4032 debug_to_insert_fork_catchpoint (int pid)
4036 retval = debug_target.to_insert_fork_catchpoint (pid);
4038 fprintf_unfiltered (gdb_stdlog, "target_insert_fork_catchpoint (%d) = %d\n",
4045 debug_to_remove_fork_catchpoint (int pid)
4049 retval = debug_target.to_remove_fork_catchpoint (pid);
4051 fprintf_unfiltered (gdb_stdlog, "target_remove_fork_catchpoint (%d) = %d\n",
4058 debug_to_insert_vfork_catchpoint (int pid)
4062 retval = debug_target.to_insert_vfork_catchpoint (pid);
4064 fprintf_unfiltered (gdb_stdlog, "target_insert_vfork_catchpoint (%d) = %d\n",
4071 debug_to_remove_vfork_catchpoint (int pid)
4075 retval = debug_target.to_remove_vfork_catchpoint (pid);
4077 fprintf_unfiltered (gdb_stdlog, "target_remove_vfork_catchpoint (%d) = %d\n",
4084 debug_to_insert_exec_catchpoint (int pid)
4088 retval = debug_target.to_insert_exec_catchpoint (pid);
4090 fprintf_unfiltered (gdb_stdlog, "target_insert_exec_catchpoint (%d) = %d\n",
4097 debug_to_remove_exec_catchpoint (int pid)
4101 retval = debug_target.to_remove_exec_catchpoint (pid);
4103 fprintf_unfiltered (gdb_stdlog, "target_remove_exec_catchpoint (%d) = %d\n",
4110 debug_to_has_exited (int pid, int wait_status, int *exit_status)
4114 has_exited = debug_target.to_has_exited (pid, wait_status, exit_status);
4116 fprintf_unfiltered (gdb_stdlog, "target_has_exited (%d, %d, %d) = %d\n",
4117 pid, wait_status, *exit_status, has_exited);
4123 debug_to_can_run (void)
4127 retval = debug_target.to_can_run ();
4129 fprintf_unfiltered (gdb_stdlog, "target_can_run () = %d\n", retval);
4134 static struct gdbarch *
4135 debug_to_thread_architecture (struct target_ops *ops, ptid_t ptid)
4137 struct gdbarch *retval;
4139 retval = debug_target.to_thread_architecture (ops, ptid);
4141 fprintf_unfiltered (gdb_stdlog,
4142 "target_thread_architecture (%s) = %s [%s]\n",
4143 target_pid_to_str (ptid),
4144 host_address_to_string (retval),
4145 gdbarch_bfd_arch_info (retval)->printable_name);
4150 debug_to_stop (ptid_t ptid)
4152 debug_target.to_stop (ptid);
4154 fprintf_unfiltered (gdb_stdlog, "target_stop (%s)\n",
4155 target_pid_to_str (ptid));
4159 debug_to_rcmd (char *command,
4160 struct ui_file *outbuf)
4162 debug_target.to_rcmd (command, outbuf);
4163 fprintf_unfiltered (gdb_stdlog, "target_rcmd (%s, ...)\n", command);
4167 debug_to_pid_to_exec_file (int pid)
4171 exec_file = debug_target.to_pid_to_exec_file (pid);
4173 fprintf_unfiltered (gdb_stdlog, "target_pid_to_exec_file (%d) = %s\n",
4180 setup_target_debug (void)
4182 memcpy (&debug_target, ¤t_target, sizeof debug_target);
4184 current_target.to_open = debug_to_open;
4185 current_target.to_post_attach = debug_to_post_attach;
4186 current_target.to_prepare_to_store = debug_to_prepare_to_store;
4187 current_target.deprecated_xfer_memory = deprecated_debug_xfer_memory;
4188 current_target.to_files_info = debug_to_files_info;
4189 current_target.to_insert_breakpoint = debug_to_insert_breakpoint;
4190 current_target.to_remove_breakpoint = debug_to_remove_breakpoint;
4191 current_target.to_can_use_hw_breakpoint = debug_to_can_use_hw_breakpoint;
4192 current_target.to_insert_hw_breakpoint = debug_to_insert_hw_breakpoint;
4193 current_target.to_remove_hw_breakpoint = debug_to_remove_hw_breakpoint;
4194 current_target.to_insert_watchpoint = debug_to_insert_watchpoint;
4195 current_target.to_remove_watchpoint = debug_to_remove_watchpoint;
4196 current_target.to_stopped_by_watchpoint = debug_to_stopped_by_watchpoint;
4197 current_target.to_stopped_data_address = debug_to_stopped_data_address;
4198 current_target.to_watchpoint_addr_within_range
4199 = debug_to_watchpoint_addr_within_range;
4200 current_target.to_region_ok_for_hw_watchpoint
4201 = debug_to_region_ok_for_hw_watchpoint;
4202 current_target.to_can_accel_watchpoint_condition
4203 = debug_to_can_accel_watchpoint_condition;
4204 current_target.to_terminal_init = debug_to_terminal_init;
4205 current_target.to_terminal_inferior = debug_to_terminal_inferior;
4206 current_target.to_terminal_ours_for_output
4207 = debug_to_terminal_ours_for_output;
4208 current_target.to_terminal_ours = debug_to_terminal_ours;
4209 current_target.to_terminal_save_ours = debug_to_terminal_save_ours;
4210 current_target.to_terminal_info = debug_to_terminal_info;
4211 current_target.to_load = debug_to_load;
4212 current_target.to_post_startup_inferior = debug_to_post_startup_inferior;
4213 current_target.to_insert_fork_catchpoint = debug_to_insert_fork_catchpoint;
4214 current_target.to_remove_fork_catchpoint = debug_to_remove_fork_catchpoint;
4215 current_target.to_insert_vfork_catchpoint = debug_to_insert_vfork_catchpoint;
4216 current_target.to_remove_vfork_catchpoint = debug_to_remove_vfork_catchpoint;
4217 current_target.to_insert_exec_catchpoint = debug_to_insert_exec_catchpoint;
4218 current_target.to_remove_exec_catchpoint = debug_to_remove_exec_catchpoint;
4219 current_target.to_has_exited = debug_to_has_exited;
4220 current_target.to_can_run = debug_to_can_run;
4221 current_target.to_stop = debug_to_stop;
4222 current_target.to_rcmd = debug_to_rcmd;
4223 current_target.to_pid_to_exec_file = debug_to_pid_to_exec_file;
4224 current_target.to_thread_architecture = debug_to_thread_architecture;
4228 static char targ_desc[] =
4229 "Names of targets and files being debugged.\nShows the entire \
4230 stack of targets currently in use (including the exec-file,\n\
4231 core-file, and process, if any), as well as the symbol file name.";
4234 do_monitor_command (char *cmd,
4237 if ((current_target.to_rcmd
4238 == (void (*) (char *, struct ui_file *)) tcomplain)
4239 || (current_target.to_rcmd == debug_to_rcmd
4240 && (debug_target.to_rcmd
4241 == (void (*) (char *, struct ui_file *)) tcomplain)))
4242 error (_("\"monitor\" command not supported by this target."));
4243 target_rcmd (cmd, gdb_stdtarg);
4246 /* Print the name of each layers of our target stack. */
4249 maintenance_print_target_stack (char *cmd, int from_tty)
4251 struct target_ops *t;
4253 printf_filtered (_("The current target stack is:\n"));
4255 for (t = target_stack; t != NULL; t = t->beneath)
4257 printf_filtered (" - %s (%s)\n", t->to_shortname, t->to_longname);
4261 /* Controls if async mode is permitted. */
4262 int target_async_permitted = 0;
4264 /* The set command writes to this variable. If the inferior is
4265 executing, linux_nat_async_permitted is *not* updated. */
4266 static int target_async_permitted_1 = 0;
4269 set_maintenance_target_async_permitted (char *args, int from_tty,
4270 struct cmd_list_element *c)
4272 if (have_live_inferiors ())
4274 target_async_permitted_1 = target_async_permitted;
4275 error (_("Cannot change this setting while the inferior is running."));
4278 target_async_permitted = target_async_permitted_1;
4282 show_maintenance_target_async_permitted (struct ui_file *file, int from_tty,
4283 struct cmd_list_element *c,
4286 fprintf_filtered (file,
4287 _("Controlling the inferior in "
4288 "asynchronous mode is %s.\n"), value);
4291 /* Temporary copies of permission settings. */
4293 static int may_write_registers_1 = 1;
4294 static int may_write_memory_1 = 1;
4295 static int may_insert_breakpoints_1 = 1;
4296 static int may_insert_tracepoints_1 = 1;
4297 static int may_insert_fast_tracepoints_1 = 1;
4298 static int may_stop_1 = 1;
4300 /* Make the user-set values match the real values again. */
4303 update_target_permissions (void)
4305 may_write_registers_1 = may_write_registers;
4306 may_write_memory_1 = may_write_memory;
4307 may_insert_breakpoints_1 = may_insert_breakpoints;
4308 may_insert_tracepoints_1 = may_insert_tracepoints;
4309 may_insert_fast_tracepoints_1 = may_insert_fast_tracepoints;
4310 may_stop_1 = may_stop;
4313 /* The one function handles (most of) the permission flags in the same
4317 set_target_permissions (char *args, int from_tty,
4318 struct cmd_list_element *c)
4320 if (target_has_execution)
4322 update_target_permissions ();
4323 error (_("Cannot change this setting while the inferior is running."));
4326 /* Make the real values match the user-changed values. */
4327 may_write_registers = may_write_registers_1;
4328 may_insert_breakpoints = may_insert_breakpoints_1;
4329 may_insert_tracepoints = may_insert_tracepoints_1;
4330 may_insert_fast_tracepoints = may_insert_fast_tracepoints_1;
4331 may_stop = may_stop_1;
4332 update_observer_mode ();
4335 /* Set memory write permission independently of observer mode. */
4338 set_write_memory_permission (char *args, int from_tty,
4339 struct cmd_list_element *c)
4341 /* Make the real values match the user-changed values. */
4342 may_write_memory = may_write_memory_1;
4343 update_observer_mode ();
4348 initialize_targets (void)
4350 init_dummy_target ();
4351 push_target (&dummy_target);
4353 add_info ("target", target_info, targ_desc);
4354 add_info ("files", target_info, targ_desc);
4356 add_setshow_zinteger_cmd ("target", class_maintenance, &targetdebug, _("\
4357 Set target debugging."), _("\
4358 Show target debugging."), _("\
4359 When non-zero, target debugging is enabled. Higher numbers are more\n\
4360 verbose. Changes do not take effect until the next \"run\" or \"target\"\n\
4364 &setdebuglist, &showdebuglist);
4366 add_setshow_boolean_cmd ("trust-readonly-sections", class_support,
4367 &trust_readonly, _("\
4368 Set mode for reading from readonly sections."), _("\
4369 Show mode for reading from readonly sections."), _("\
4370 When this mode is on, memory reads from readonly sections (such as .text)\n\
4371 will be read from the object file instead of from the target. This will\n\
4372 result in significant performance improvement for remote targets."),
4374 show_trust_readonly,
4375 &setlist, &showlist);
4377 add_com ("monitor", class_obscure, do_monitor_command,
4378 _("Send a command to the remote monitor (remote targets only)."));
4380 add_cmd ("target-stack", class_maintenance, maintenance_print_target_stack,
4381 _("Print the name of each layer of the internal target stack."),
4382 &maintenanceprintlist);
4384 add_setshow_boolean_cmd ("target-async", no_class,
4385 &target_async_permitted_1, _("\
4386 Set whether gdb controls the inferior in asynchronous mode."), _("\
4387 Show whether gdb controls the inferior in asynchronous mode."), _("\
4388 Tells gdb whether to control the inferior in asynchronous mode."),
4389 set_maintenance_target_async_permitted,
4390 show_maintenance_target_async_permitted,
4394 add_setshow_boolean_cmd ("stack-cache", class_support,
4395 &stack_cache_enabled_p_1, _("\
4396 Set cache use for stack access."), _("\
4397 Show cache use for stack access."), _("\
4398 When on, use the data cache for all stack access, regardless of any\n\
4399 configured memory regions. This improves remote performance significantly.\n\
4400 By default, caching for stack access is on."),
4401 set_stack_cache_enabled_p,
4402 show_stack_cache_enabled_p,
4403 &setlist, &showlist);
4405 add_setshow_boolean_cmd ("may-write-registers", class_support,
4406 &may_write_registers_1, _("\
4407 Set permission to write into registers."), _("\
4408 Show permission to write into registers."), _("\
4409 When this permission is on, GDB may write into the target's registers.\n\
4410 Otherwise, any sort of write attempt will result in an error."),
4411 set_target_permissions, NULL,
4412 &setlist, &showlist);
4414 add_setshow_boolean_cmd ("may-write-memory", class_support,
4415 &may_write_memory_1, _("\
4416 Set permission to write into target memory."), _("\
4417 Show permission to write into target memory."), _("\
4418 When this permission is on, GDB may write into the target's memory.\n\
4419 Otherwise, any sort of write attempt will result in an error."),
4420 set_write_memory_permission, NULL,
4421 &setlist, &showlist);
4423 add_setshow_boolean_cmd ("may-insert-breakpoints", class_support,
4424 &may_insert_breakpoints_1, _("\
4425 Set permission to insert breakpoints in the target."), _("\
4426 Show permission to insert breakpoints in the target."), _("\
4427 When this permission is on, GDB may insert breakpoints in the program.\n\
4428 Otherwise, any sort of insertion attempt will result in an error."),
4429 set_target_permissions, NULL,
4430 &setlist, &showlist);
4432 add_setshow_boolean_cmd ("may-insert-tracepoints", class_support,
4433 &may_insert_tracepoints_1, _("\
4434 Set permission to insert tracepoints in the target."), _("\
4435 Show permission to insert tracepoints in the target."), _("\
4436 When this permission is on, GDB may insert tracepoints in the program.\n\
4437 Otherwise, any sort of insertion attempt will result in an error."),
4438 set_target_permissions, NULL,
4439 &setlist, &showlist);
4441 add_setshow_boolean_cmd ("may-insert-fast-tracepoints", class_support,
4442 &may_insert_fast_tracepoints_1, _("\
4443 Set permission to insert fast tracepoints in the target."), _("\
4444 Show permission to insert fast tracepoints in the target."), _("\
4445 When this permission is on, GDB may insert fast tracepoints.\n\
4446 Otherwise, any sort of insertion attempt will result in an error."),
4447 set_target_permissions, NULL,
4448 &setlist, &showlist);
4450 add_setshow_boolean_cmd ("may-interrupt", class_support,
4452 Set permission to interrupt or signal the target."), _("\
4453 Show permission to interrupt or signal the target."), _("\
4454 When this permission is on, GDB may interrupt/stop the target's execution.\n\
4455 Otherwise, any attempt to interrupt or stop will be ignored."),
4456 set_target_permissions, NULL,
4457 &setlist, &showlist);
4460 target_dcache = dcache_init ();