1 /* Select target systems and architectures at runtime for GDB.
3 Copyright (C) 1990-2014 Free Software Foundation, Inc.
5 Contributed by Cygnus Support.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
26 #include "target-dcache.h"
36 #include "gdb_assert.h"
38 #include "exceptions.h"
39 #include "target-descriptions.h"
40 #include "gdbthread.h"
43 #include "inline-frame.h"
44 #include "tracepoint.h"
45 #include "gdb/fileio.h"
48 static void target_info (char *, int);
50 static void default_terminal_info (struct target_ops *, const 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 (struct target_ops *,
58 static void default_rcmd (struct target_ops *, char *, struct ui_file *);
60 static void tcomplain (void) ATTRIBUTE_NORETURN;
62 static int nomemory (CORE_ADDR, char *, int, int, struct target_ops *);
64 static int return_zero (void);
66 static int return_minus_one (void);
68 static void *return_null (void);
70 void target_ignore (void);
72 static void target_command (char *, int);
74 static struct target_ops *find_default_run_target (char *);
76 static target_xfer_partial_ftype default_xfer_partial;
78 static struct gdbarch *default_thread_architecture (struct target_ops *ops,
81 static int find_default_can_async_p (struct target_ops *ignore);
83 static int find_default_is_async_p (struct target_ops *ignore);
85 #include "target-delegates.c"
87 static void init_dummy_target (void);
89 static struct target_ops debug_target;
91 static void debug_to_open (char *, int);
93 static void debug_to_prepare_to_store (struct target_ops *self,
96 static void debug_to_files_info (struct target_ops *);
98 static int debug_to_insert_breakpoint (struct target_ops *, struct gdbarch *,
99 struct bp_target_info *);
101 static int debug_to_remove_breakpoint (struct target_ops *, struct gdbarch *,
102 struct bp_target_info *);
104 static int debug_to_can_use_hw_breakpoint (struct target_ops *self,
107 static int debug_to_insert_hw_breakpoint (struct target_ops *self,
109 struct bp_target_info *);
111 static int debug_to_remove_hw_breakpoint (struct target_ops *self,
113 struct bp_target_info *);
115 static int debug_to_insert_watchpoint (struct target_ops *self,
117 struct expression *);
119 static int debug_to_remove_watchpoint (struct target_ops *self,
121 struct expression *);
123 static int debug_to_stopped_data_address (struct target_ops *, CORE_ADDR *);
125 static int debug_to_watchpoint_addr_within_range (struct target_ops *,
126 CORE_ADDR, CORE_ADDR, int);
128 static int debug_to_region_ok_for_hw_watchpoint (struct target_ops *self,
131 static int debug_to_can_accel_watchpoint_condition (struct target_ops *self,
133 struct expression *);
135 static void debug_to_terminal_init (struct target_ops *self);
137 static void debug_to_terminal_inferior (struct target_ops *self);
139 static void debug_to_terminal_ours_for_output (struct target_ops *self);
141 static void debug_to_terminal_save_ours (struct target_ops *self);
143 static void debug_to_terminal_ours (struct target_ops *self);
145 static void debug_to_load (struct target_ops *self, char *, int);
147 static int debug_to_can_run (struct target_ops *self);
149 static void debug_to_stop (struct target_ops *self, ptid_t);
151 /* Pointer to array of target architecture structures; the size of the
152 array; the current index into the array; the allocated size of the
154 struct target_ops **target_structs;
155 unsigned target_struct_size;
156 unsigned target_struct_allocsize;
157 #define DEFAULT_ALLOCSIZE 10
159 /* The initial current target, so that there is always a semi-valid
162 static struct target_ops dummy_target;
164 /* Top of target stack. */
166 static struct target_ops *target_stack;
168 /* The target structure we are currently using to talk to a process
169 or file or whatever "inferior" we have. */
171 struct target_ops current_target;
173 /* Command list for target. */
175 static struct cmd_list_element *targetlist = NULL;
177 /* Nonzero if we should trust readonly sections from the
178 executable when reading memory. */
180 static int trust_readonly = 0;
182 /* Nonzero if we should show true memory content including
183 memory breakpoint inserted by gdb. */
185 static int show_memory_breakpoints = 0;
187 /* These globals control whether GDB attempts to perform these
188 operations; they are useful for targets that need to prevent
189 inadvertant disruption, such as in non-stop mode. */
191 int may_write_registers = 1;
193 int may_write_memory = 1;
195 int may_insert_breakpoints = 1;
197 int may_insert_tracepoints = 1;
199 int may_insert_fast_tracepoints = 1;
203 /* Non-zero if we want to see trace of target level stuff. */
205 static unsigned int targetdebug = 0;
207 show_targetdebug (struct ui_file *file, int from_tty,
208 struct cmd_list_element *c, const char *value)
210 fprintf_filtered (file, _("Target debugging is %s.\n"), value);
213 static void setup_target_debug (void);
215 /* The user just typed 'target' without the name of a target. */
218 target_command (char *arg, int from_tty)
220 fputs_filtered ("Argument required (target name). Try `help target'\n",
224 /* Default target_has_* methods for process_stratum targets. */
227 default_child_has_all_memory (struct target_ops *ops)
229 /* If no inferior selected, then we can't read memory here. */
230 if (ptid_equal (inferior_ptid, null_ptid))
237 default_child_has_memory (struct target_ops *ops)
239 /* If no inferior selected, then we can't read memory here. */
240 if (ptid_equal (inferior_ptid, null_ptid))
247 default_child_has_stack (struct target_ops *ops)
249 /* If no inferior selected, there's no stack. */
250 if (ptid_equal (inferior_ptid, null_ptid))
257 default_child_has_registers (struct target_ops *ops)
259 /* Can't read registers from no inferior. */
260 if (ptid_equal (inferior_ptid, null_ptid))
267 default_child_has_execution (struct target_ops *ops, ptid_t the_ptid)
269 /* If there's no thread selected, then we can't make it run through
271 if (ptid_equal (the_ptid, null_ptid))
279 target_has_all_memory_1 (void)
281 struct target_ops *t;
283 for (t = current_target.beneath; t != NULL; t = t->beneath)
284 if (t->to_has_all_memory (t))
291 target_has_memory_1 (void)
293 struct target_ops *t;
295 for (t = current_target.beneath; t != NULL; t = t->beneath)
296 if (t->to_has_memory (t))
303 target_has_stack_1 (void)
305 struct target_ops *t;
307 for (t = current_target.beneath; t != NULL; t = t->beneath)
308 if (t->to_has_stack (t))
315 target_has_registers_1 (void)
317 struct target_ops *t;
319 for (t = current_target.beneath; t != NULL; t = t->beneath)
320 if (t->to_has_registers (t))
327 target_has_execution_1 (ptid_t the_ptid)
329 struct target_ops *t;
331 for (t = current_target.beneath; t != NULL; t = t->beneath)
332 if (t->to_has_execution (t, the_ptid))
339 target_has_execution_current (void)
341 return target_has_execution_1 (inferior_ptid);
344 /* Complete initialization of T. This ensures that various fields in
345 T are set, if needed by the target implementation. */
348 complete_target_initialization (struct target_ops *t)
350 /* Provide default values for all "must have" methods. */
351 if (t->to_xfer_partial == NULL)
352 t->to_xfer_partial = default_xfer_partial;
354 if (t->to_has_all_memory == NULL)
355 t->to_has_all_memory = (int (*) (struct target_ops *)) return_zero;
357 if (t->to_has_memory == NULL)
358 t->to_has_memory = (int (*) (struct target_ops *)) return_zero;
360 if (t->to_has_stack == NULL)
361 t->to_has_stack = (int (*) (struct target_ops *)) return_zero;
363 if (t->to_has_registers == NULL)
364 t->to_has_registers = (int (*) (struct target_ops *)) return_zero;
366 if (t->to_has_execution == NULL)
367 t->to_has_execution = (int (*) (struct target_ops *, ptid_t)) return_zero;
369 install_delegators (t);
372 /* Add possible target architecture T to the list and add a new
373 command 'target T->to_shortname'. Set COMPLETER as the command's
374 completer if not NULL. */
377 add_target_with_completer (struct target_ops *t,
378 completer_ftype *completer)
380 struct cmd_list_element *c;
382 complete_target_initialization (t);
386 target_struct_allocsize = DEFAULT_ALLOCSIZE;
387 target_structs = (struct target_ops **) xmalloc
388 (target_struct_allocsize * sizeof (*target_structs));
390 if (target_struct_size >= target_struct_allocsize)
392 target_struct_allocsize *= 2;
393 target_structs = (struct target_ops **)
394 xrealloc ((char *) target_structs,
395 target_struct_allocsize * sizeof (*target_structs));
397 target_structs[target_struct_size++] = t;
399 if (targetlist == NULL)
400 add_prefix_cmd ("target", class_run, target_command, _("\
401 Connect to a target machine or process.\n\
402 The first argument is the type or protocol of the target machine.\n\
403 Remaining arguments are interpreted by the target protocol. For more\n\
404 information on the arguments for a particular protocol, type\n\
405 `help target ' followed by the protocol name."),
406 &targetlist, "target ", 0, &cmdlist);
407 c = add_cmd (t->to_shortname, no_class, t->to_open, t->to_doc,
409 if (completer != NULL)
410 set_cmd_completer (c, completer);
413 /* Add a possible target architecture to the list. */
416 add_target (struct target_ops *t)
418 add_target_with_completer (t, NULL);
424 add_deprecated_target_alias (struct target_ops *t, char *alias)
426 struct cmd_list_element *c;
429 /* If we use add_alias_cmd, here, we do not get the deprecated warning,
431 c = add_cmd (alias, no_class, t->to_open, t->to_doc, &targetlist);
432 alt = xstrprintf ("target %s", t->to_shortname);
433 deprecate_cmd (c, alt);
446 struct target_ops *t;
448 for (t = current_target.beneath; t != NULL; t = t->beneath)
449 if (t->to_kill != NULL)
452 fprintf_unfiltered (gdb_stdlog, "target_kill ()\n");
462 target_load (char *arg, int from_tty)
464 target_dcache_invalidate ();
465 (*current_target.to_load) (¤t_target, arg, from_tty);
469 target_create_inferior (char *exec_file, char *args,
470 char **env, int from_tty)
472 struct target_ops *t;
474 for (t = current_target.beneath; t != NULL; t = t->beneath)
476 if (t->to_create_inferior != NULL)
478 t->to_create_inferior (t, exec_file, args, env, from_tty);
480 fprintf_unfiltered (gdb_stdlog,
481 "target_create_inferior (%s, %s, xxx, %d)\n",
482 exec_file, args, from_tty);
487 internal_error (__FILE__, __LINE__,
488 _("could not find a target to create inferior"));
492 target_terminal_inferior (void)
494 /* A background resume (``run&'') should leave GDB in control of the
495 terminal. Use target_can_async_p, not target_is_async_p, since at
496 this point the target is not async yet. However, if sync_execution
497 is not set, we know it will become async prior to resume. */
498 if (target_can_async_p () && !sync_execution)
501 /* If GDB is resuming the inferior in the foreground, install
502 inferior's terminal modes. */
503 (*current_target.to_terminal_inferior) (¤t_target);
507 nomemory (CORE_ADDR memaddr, char *myaddr, int len, int write,
508 struct target_ops *t)
510 errno = EIO; /* Can't read/write this location. */
511 return 0; /* No bytes handled. */
517 error (_("You can't do that when your target is `%s'"),
518 current_target.to_shortname);
524 error (_("You can't do that without a process to debug."));
528 default_terminal_info (struct target_ops *self, const char *args, int from_tty)
530 printf_unfiltered (_("No saved terminal information.\n"));
533 /* A default implementation for the to_get_ada_task_ptid target method.
535 This function builds the PTID by using both LWP and TID as part of
536 the PTID lwp and tid elements. The pid used is the pid of the
540 default_get_ada_task_ptid (struct target_ops *self, long lwp, long tid)
542 return ptid_build (ptid_get_pid (inferior_ptid), lwp, tid);
545 static enum exec_direction_kind
546 default_execution_direction (struct target_ops *self)
548 if (!target_can_execute_reverse)
550 else if (!target_can_async_p ())
553 gdb_assert_not_reached ("\
554 to_execution_direction must be implemented for reverse async");
557 /* Go through the target stack from top to bottom, copying over zero
558 entries in current_target, then filling in still empty entries. In
559 effect, we are doing class inheritance through the pushed target
562 NOTE: cagney/2003-10-17: The problem with this inheritance, as it
563 is currently implemented, is that it discards any knowledge of
564 which target an inherited method originally belonged to.
565 Consequently, new new target methods should instead explicitly and
566 locally search the target stack for the target that can handle the
570 update_current_target (void)
572 struct target_ops *t;
574 /* First, reset current's contents. */
575 memset (¤t_target, 0, sizeof (current_target));
577 /* Install the delegators. */
578 install_delegators (¤t_target);
580 #define INHERIT(FIELD, TARGET) \
581 if (!current_target.FIELD) \
582 current_target.FIELD = (TARGET)->FIELD
584 for (t = target_stack; t; t = t->beneath)
586 INHERIT (to_shortname, t);
587 INHERIT (to_longname, t);
589 /* Do not inherit to_open. */
590 /* Do not inherit to_close. */
591 /* Do not inherit to_attach. */
592 /* Do not inherit to_post_attach. */
593 INHERIT (to_attach_no_wait, t);
594 /* Do not inherit to_detach. */
595 /* Do not inherit to_disconnect. */
596 /* Do not inherit to_resume. */
597 /* Do not inherit to_wait. */
598 /* Do not inherit to_fetch_registers. */
599 /* Do not inherit to_store_registers. */
600 /* Do not inherit to_prepare_to_store. */
601 INHERIT (deprecated_xfer_memory, t);
602 /* Do not inherit to_files_info. */
603 /* Do not inherit to_insert_breakpoint. */
604 /* Do not inherit to_remove_breakpoint. */
605 /* Do not inherit to_can_use_hw_breakpoint. */
606 /* Do not inherit to_insert_hw_breakpoint. */
607 /* Do not inherit to_remove_hw_breakpoint. */
608 /* Do not inherit to_ranged_break_num_registers. */
609 /* Do not inherit to_insert_watchpoint. */
610 /* Do not inherit to_remove_watchpoint. */
611 /* Do not inherit to_insert_mask_watchpoint. */
612 /* Do not inherit to_remove_mask_watchpoint. */
613 /* Do not inherit to_stopped_data_address. */
614 INHERIT (to_have_steppable_watchpoint, t);
615 INHERIT (to_have_continuable_watchpoint, t);
616 /* Do not inherit to_stopped_by_watchpoint. */
617 /* Do not inherit to_watchpoint_addr_within_range. */
618 /* Do not inherit to_region_ok_for_hw_watchpoint. */
619 /* Do not inherit to_can_accel_watchpoint_condition. */
620 /* Do not inherit to_masked_watch_num_registers. */
621 /* Do not inherit to_terminal_init. */
622 /* Do not inherit to_terminal_inferior. */
623 /* Do not inherit to_terminal_ours_for_output. */
624 /* Do not inherit to_terminal_ours. */
625 /* Do not inherit to_terminal_save_ours. */
626 /* Do not inherit to_terminal_info. */
627 /* Do not inherit to_kill. */
628 /* Do not inherit to_load. */
629 /* Do no inherit to_create_inferior. */
630 /* Do not inherit to_post_startup_inferior. */
631 /* Do not inherit to_insert_fork_catchpoint. */
632 /* Do not inherit to_remove_fork_catchpoint. */
633 /* Do not inherit to_insert_vfork_catchpoint. */
634 /* Do not inherit to_remove_vfork_catchpoint. */
635 /* Do not inherit to_follow_fork. */
636 /* Do not inherit to_insert_exec_catchpoint. */
637 /* Do not inherit to_remove_exec_catchpoint. */
638 /* Do not inherit to_set_syscall_catchpoint. */
639 /* Do not inherit to_has_exited. */
640 /* Do not inherit to_mourn_inferior. */
641 INHERIT (to_can_run, t);
642 /* Do not inherit to_pass_signals. */
643 /* Do not inherit to_program_signals. */
644 /* Do not inherit to_thread_alive. */
645 /* Do not inherit to_find_new_threads. */
646 /* Do not inherit to_pid_to_str. */
647 /* Do not inherit to_extra_thread_info. */
648 INHERIT (to_thread_name, t);
649 INHERIT (to_stop, t);
650 /* Do not inherit to_xfer_partial. */
651 /* Do not inherit to_rcmd. */
652 INHERIT (to_pid_to_exec_file, t);
653 INHERIT (to_log_command, t);
654 INHERIT (to_stratum, t);
655 /* Do not inherit to_has_all_memory. */
656 /* Do not inherit to_has_memory. */
657 /* Do not inherit to_has_stack. */
658 /* Do not inherit to_has_registers. */
659 /* Do not inherit to_has_execution. */
660 INHERIT (to_has_thread_control, t);
661 /* Do not inherit to_can_async_p. */
662 /* Do not inherit to_is_async_p. */
663 /* Do not inherit to_async. */
664 INHERIT (to_find_memory_regions, t);
665 INHERIT (to_make_corefile_notes, t);
666 INHERIT (to_get_bookmark, t);
667 INHERIT (to_goto_bookmark, t);
668 /* Do not inherit to_get_thread_local_address. */
669 INHERIT (to_can_execute_reverse, t);
670 INHERIT (to_execution_direction, t);
671 INHERIT (to_thread_architecture, t);
672 /* Do not inherit to_read_description. */
673 INHERIT (to_get_ada_task_ptid, t);
674 /* Do not inherit to_search_memory. */
675 INHERIT (to_supports_multi_process, t);
676 INHERIT (to_supports_enable_disable_tracepoint, t);
677 INHERIT (to_supports_string_tracing, t);
678 INHERIT (to_trace_init, t);
679 INHERIT (to_download_tracepoint, t);
680 INHERIT (to_can_download_tracepoint, t);
681 INHERIT (to_download_trace_state_variable, t);
682 INHERIT (to_enable_tracepoint, t);
683 INHERIT (to_disable_tracepoint, t);
684 INHERIT (to_trace_set_readonly_regions, t);
685 INHERIT (to_trace_start, t);
686 INHERIT (to_get_trace_status, t);
687 INHERIT (to_get_tracepoint_status, t);
688 INHERIT (to_trace_stop, t);
689 INHERIT (to_trace_find, t);
690 INHERIT (to_get_trace_state_variable_value, t);
691 INHERIT (to_save_trace_data, t);
692 INHERIT (to_upload_tracepoints, t);
693 INHERIT (to_upload_trace_state_variables, t);
694 INHERIT (to_get_raw_trace_data, t);
695 INHERIT (to_get_min_fast_tracepoint_insn_len, t);
696 INHERIT (to_set_disconnected_tracing, t);
697 INHERIT (to_set_circular_trace_buffer, t);
698 INHERIT (to_set_trace_buffer_size, t);
699 INHERIT (to_set_trace_notes, t);
700 INHERIT (to_get_tib_address, t);
701 INHERIT (to_set_permissions, t);
702 INHERIT (to_static_tracepoint_marker_at, t);
703 INHERIT (to_static_tracepoint_markers_by_strid, t);
704 INHERIT (to_traceframe_info, t);
705 INHERIT (to_use_agent, t);
706 INHERIT (to_can_use_agent, t);
707 INHERIT (to_augmented_libraries_svr4_read, t);
708 INHERIT (to_magic, t);
709 INHERIT (to_supports_evaluation_of_breakpoint_conditions, t);
710 INHERIT (to_can_run_breakpoint_commands, t);
711 /* Do not inherit to_memory_map. */
712 /* Do not inherit to_flash_erase. */
713 /* Do not inherit to_flash_done. */
717 /* Clean up a target struct so it no longer has any zero pointers in
718 it. Some entries are defaulted to a method that print an error,
719 others are hard-wired to a standard recursive default. */
721 #define de_fault(field, value) \
722 if (!current_target.field) \
723 current_target.field = value
726 (void (*) (char *, int))
729 (void (*) (struct target_ops *))
731 de_fault (deprecated_xfer_memory,
732 (int (*) (CORE_ADDR, gdb_byte *, int, int,
733 struct mem_attrib *, struct target_ops *))
735 de_fault (to_can_run,
736 (int (*) (struct target_ops *))
738 de_fault (to_thread_name,
739 (char *(*) (struct target_ops *, struct thread_info *))
742 (void (*) (struct target_ops *, ptid_t))
744 de_fault (to_pid_to_exec_file,
745 (char *(*) (struct target_ops *, int))
747 de_fault (to_thread_architecture,
748 default_thread_architecture);
749 current_target.to_read_description = NULL;
750 de_fault (to_get_ada_task_ptid,
751 (ptid_t (*) (struct target_ops *, long, long))
752 default_get_ada_task_ptid);
753 de_fault (to_supports_multi_process,
754 (int (*) (struct target_ops *))
756 de_fault (to_supports_enable_disable_tracepoint,
757 (int (*) (struct target_ops *))
759 de_fault (to_supports_string_tracing,
760 (int (*) (struct target_ops *))
762 de_fault (to_trace_init,
763 (void (*) (struct target_ops *))
765 de_fault (to_download_tracepoint,
766 (void (*) (struct target_ops *, struct bp_location *))
768 de_fault (to_can_download_tracepoint,
769 (int (*) (struct target_ops *))
771 de_fault (to_download_trace_state_variable,
772 (void (*) (struct target_ops *, struct trace_state_variable *))
774 de_fault (to_enable_tracepoint,
775 (void (*) (struct target_ops *, struct bp_location *))
777 de_fault (to_disable_tracepoint,
778 (void (*) (struct target_ops *, struct bp_location *))
780 de_fault (to_trace_set_readonly_regions,
781 (void (*) (struct target_ops *))
783 de_fault (to_trace_start,
784 (void (*) (struct target_ops *))
786 de_fault (to_get_trace_status,
787 (int (*) (struct target_ops *, struct trace_status *))
789 de_fault (to_get_tracepoint_status,
790 (void (*) (struct target_ops *, struct breakpoint *,
791 struct uploaded_tp *))
793 de_fault (to_trace_stop,
794 (void (*) (struct target_ops *))
796 de_fault (to_trace_find,
797 (int (*) (struct target_ops *,
798 enum trace_find_type, int, CORE_ADDR, CORE_ADDR, int *))
800 de_fault (to_get_trace_state_variable_value,
801 (int (*) (struct target_ops *, int, LONGEST *))
803 de_fault (to_save_trace_data,
804 (int (*) (struct target_ops *, const char *))
806 de_fault (to_upload_tracepoints,
807 (int (*) (struct target_ops *, struct uploaded_tp **))
809 de_fault (to_upload_trace_state_variables,
810 (int (*) (struct target_ops *, struct uploaded_tsv **))
812 de_fault (to_get_raw_trace_data,
813 (LONGEST (*) (struct target_ops *, gdb_byte *, ULONGEST, LONGEST))
815 de_fault (to_get_min_fast_tracepoint_insn_len,
816 (int (*) (struct target_ops *))
818 de_fault (to_set_disconnected_tracing,
819 (void (*) (struct target_ops *, int))
821 de_fault (to_set_circular_trace_buffer,
822 (void (*) (struct target_ops *, int))
824 de_fault (to_set_trace_buffer_size,
825 (void (*) (struct target_ops *, LONGEST))
827 de_fault (to_set_trace_notes,
828 (int (*) (struct target_ops *,
829 const char *, const char *, const char *))
831 de_fault (to_get_tib_address,
832 (int (*) (struct target_ops *, ptid_t, CORE_ADDR *))
834 de_fault (to_set_permissions,
835 (void (*) (struct target_ops *))
837 de_fault (to_static_tracepoint_marker_at,
838 (int (*) (struct target_ops *,
839 CORE_ADDR, struct static_tracepoint_marker *))
841 de_fault (to_static_tracepoint_markers_by_strid,
842 (VEC(static_tracepoint_marker_p) * (*) (struct target_ops *,
845 de_fault (to_traceframe_info,
846 (struct traceframe_info * (*) (struct target_ops *))
848 de_fault (to_supports_evaluation_of_breakpoint_conditions,
849 (int (*) (struct target_ops *))
851 de_fault (to_can_run_breakpoint_commands,
852 (int (*) (struct target_ops *))
854 de_fault (to_use_agent,
855 (int (*) (struct target_ops *, int))
857 de_fault (to_can_use_agent,
858 (int (*) (struct target_ops *))
860 de_fault (to_augmented_libraries_svr4_read,
861 (int (*) (struct target_ops *))
863 de_fault (to_execution_direction, default_execution_direction);
867 /* Finally, position the target-stack beneath the squashed
868 "current_target". That way code looking for a non-inherited
869 target method can quickly and simply find it. */
870 current_target.beneath = target_stack;
873 setup_target_debug ();
876 /* Push a new target type into the stack of the existing target accessors,
877 possibly superseding some of the existing accessors.
879 Rather than allow an empty stack, we always have the dummy target at
880 the bottom stratum, so we can call the function vectors without
884 push_target (struct target_ops *t)
886 struct target_ops **cur;
888 /* Check magic number. If wrong, it probably means someone changed
889 the struct definition, but not all the places that initialize one. */
890 if (t->to_magic != OPS_MAGIC)
892 fprintf_unfiltered (gdb_stderr,
893 "Magic number of %s target struct wrong\n",
895 internal_error (__FILE__, __LINE__,
896 _("failed internal consistency check"));
899 /* Find the proper stratum to install this target in. */
900 for (cur = &target_stack; (*cur) != NULL; cur = &(*cur)->beneath)
902 if ((int) (t->to_stratum) >= (int) (*cur)->to_stratum)
906 /* If there's already targets at this stratum, remove them. */
907 /* FIXME: cagney/2003-10-15: I think this should be popping all
908 targets to CUR, and not just those at this stratum level. */
909 while ((*cur) != NULL && t->to_stratum == (*cur)->to_stratum)
911 /* There's already something at this stratum level. Close it,
912 and un-hook it from the stack. */
913 struct target_ops *tmp = (*cur);
915 (*cur) = (*cur)->beneath;
920 /* We have removed all targets in our stratum, now add the new one. */
924 update_current_target ();
927 /* Remove a target_ops vector from the stack, wherever it may be.
928 Return how many times it was removed (0 or 1). */
931 unpush_target (struct target_ops *t)
933 struct target_ops **cur;
934 struct target_ops *tmp;
936 if (t->to_stratum == dummy_stratum)
937 internal_error (__FILE__, __LINE__,
938 _("Attempt to unpush the dummy target"));
940 /* Look for the specified target. Note that we assume that a target
941 can only occur once in the target stack. */
943 for (cur = &target_stack; (*cur) != NULL; cur = &(*cur)->beneath)
949 /* If we don't find target_ops, quit. Only open targets should be
954 /* Unchain the target. */
956 (*cur) = (*cur)->beneath;
959 update_current_target ();
961 /* Finally close the target. Note we do this after unchaining, so
962 any target method calls from within the target_close
963 implementation don't end up in T anymore. */
970 pop_all_targets_above (enum strata above_stratum)
972 while ((int) (current_target.to_stratum) > (int) above_stratum)
974 if (!unpush_target (target_stack))
976 fprintf_unfiltered (gdb_stderr,
977 "pop_all_targets couldn't find target %s\n",
978 target_stack->to_shortname);
979 internal_error (__FILE__, __LINE__,
980 _("failed internal consistency check"));
987 pop_all_targets (void)
989 pop_all_targets_above (dummy_stratum);
992 /* Return 1 if T is now pushed in the target stack. Return 0 otherwise. */
995 target_is_pushed (struct target_ops *t)
997 struct target_ops **cur;
999 /* Check magic number. If wrong, it probably means someone changed
1000 the struct definition, but not all the places that initialize one. */
1001 if (t->to_magic != OPS_MAGIC)
1003 fprintf_unfiltered (gdb_stderr,
1004 "Magic number of %s target struct wrong\n",
1006 internal_error (__FILE__, __LINE__,
1007 _("failed internal consistency check"));
1010 for (cur = &target_stack; (*cur) != NULL; cur = &(*cur)->beneath)
1017 /* Using the objfile specified in OBJFILE, find the address for the
1018 current thread's thread-local storage with offset OFFSET. */
1020 target_translate_tls_address (struct objfile *objfile, CORE_ADDR offset)
1022 volatile CORE_ADDR addr = 0;
1023 struct target_ops *target;
1025 for (target = current_target.beneath;
1027 target = target->beneath)
1029 if (target->to_get_thread_local_address != NULL)
1034 && gdbarch_fetch_tls_load_module_address_p (target_gdbarch ()))
1036 ptid_t ptid = inferior_ptid;
1037 volatile struct gdb_exception ex;
1039 TRY_CATCH (ex, RETURN_MASK_ALL)
1043 /* Fetch the load module address for this objfile. */
1044 lm_addr = gdbarch_fetch_tls_load_module_address (target_gdbarch (),
1046 /* If it's 0, throw the appropriate exception. */
1048 throw_error (TLS_LOAD_MODULE_NOT_FOUND_ERROR,
1049 _("TLS load module not found"));
1051 addr = target->to_get_thread_local_address (target, ptid,
1054 /* If an error occurred, print TLS related messages here. Otherwise,
1055 throw the error to some higher catcher. */
1058 int objfile_is_library = (objfile->flags & OBJF_SHARED);
1062 case TLS_NO_LIBRARY_SUPPORT_ERROR:
1063 error (_("Cannot find thread-local variables "
1064 "in this thread library."));
1066 case TLS_LOAD_MODULE_NOT_FOUND_ERROR:
1067 if (objfile_is_library)
1068 error (_("Cannot find shared library `%s' in dynamic"
1069 " linker's load module list"), objfile_name (objfile));
1071 error (_("Cannot find executable file `%s' in dynamic"
1072 " linker's load module list"), objfile_name (objfile));
1074 case TLS_NOT_ALLOCATED_YET_ERROR:
1075 if (objfile_is_library)
1076 error (_("The inferior has not yet allocated storage for"
1077 " thread-local variables in\n"
1078 "the shared library `%s'\n"
1080 objfile_name (objfile), target_pid_to_str (ptid));
1082 error (_("The inferior has not yet allocated storage for"
1083 " thread-local variables in\n"
1084 "the executable `%s'\n"
1086 objfile_name (objfile), target_pid_to_str (ptid));
1088 case TLS_GENERIC_ERROR:
1089 if (objfile_is_library)
1090 error (_("Cannot find thread-local storage for %s, "
1091 "shared library %s:\n%s"),
1092 target_pid_to_str (ptid),
1093 objfile_name (objfile), ex.message);
1095 error (_("Cannot find thread-local storage for %s, "
1096 "executable file %s:\n%s"),
1097 target_pid_to_str (ptid),
1098 objfile_name (objfile), ex.message);
1101 throw_exception (ex);
1106 /* It wouldn't be wrong here to try a gdbarch method, too; finding
1107 TLS is an ABI-specific thing. But we don't do that yet. */
1109 error (_("Cannot find thread-local variables on this target"));
1115 target_xfer_status_to_string (enum target_xfer_status err)
1117 #define CASE(X) case X: return #X
1120 CASE(TARGET_XFER_E_IO);
1121 CASE(TARGET_XFER_E_UNAVAILABLE);
1130 #define MIN(A, B) (((A) <= (B)) ? (A) : (B))
1132 /* target_read_string -- read a null terminated string, up to LEN bytes,
1133 from MEMADDR in target. Set *ERRNOP to the errno code, or 0 if successful.
1134 Set *STRING to a pointer to malloc'd memory containing the data; the caller
1135 is responsible for freeing it. Return the number of bytes successfully
1139 target_read_string (CORE_ADDR memaddr, char **string, int len, int *errnop)
1141 int tlen, offset, i;
1145 int buffer_allocated;
1147 unsigned int nbytes_read = 0;
1149 gdb_assert (string);
1151 /* Small for testing. */
1152 buffer_allocated = 4;
1153 buffer = xmalloc (buffer_allocated);
1158 tlen = MIN (len, 4 - (memaddr & 3));
1159 offset = memaddr & 3;
1161 errcode = target_read_memory (memaddr & ~3, buf, sizeof buf);
1164 /* The transfer request might have crossed the boundary to an
1165 unallocated region of memory. Retry the transfer, requesting
1169 errcode = target_read_memory (memaddr, buf, 1);
1174 if (bufptr - buffer + tlen > buffer_allocated)
1178 bytes = bufptr - buffer;
1179 buffer_allocated *= 2;
1180 buffer = xrealloc (buffer, buffer_allocated);
1181 bufptr = buffer + bytes;
1184 for (i = 0; i < tlen; i++)
1186 *bufptr++ = buf[i + offset];
1187 if (buf[i + offset] == '\000')
1189 nbytes_read += i + 1;
1196 nbytes_read += tlen;
1205 struct target_section_table *
1206 target_get_section_table (struct target_ops *target)
1208 struct target_ops *t;
1211 fprintf_unfiltered (gdb_stdlog, "target_get_section_table ()\n");
1213 for (t = target; t != NULL; t = t->beneath)
1214 if (t->to_get_section_table != NULL)
1215 return (*t->to_get_section_table) (t);
1220 /* Find a section containing ADDR. */
1222 struct target_section *
1223 target_section_by_addr (struct target_ops *target, CORE_ADDR addr)
1225 struct target_section_table *table = target_get_section_table (target);
1226 struct target_section *secp;
1231 for (secp = table->sections; secp < table->sections_end; secp++)
1233 if (addr >= secp->addr && addr < secp->endaddr)
1239 /* Read memory from the live target, even if currently inspecting a
1240 traceframe. The return is the same as that of target_read. */
1242 static enum target_xfer_status
1243 target_read_live_memory (enum target_object object,
1244 ULONGEST memaddr, gdb_byte *myaddr, ULONGEST len,
1245 ULONGEST *xfered_len)
1247 enum target_xfer_status ret;
1248 struct cleanup *cleanup;
1250 /* Switch momentarily out of tfind mode so to access live memory.
1251 Note that this must not clear global state, such as the frame
1252 cache, which must still remain valid for the previous traceframe.
1253 We may be _building_ the frame cache at this point. */
1254 cleanup = make_cleanup_restore_traceframe_number ();
1255 set_traceframe_number (-1);
1257 ret = target_xfer_partial (current_target.beneath, object, NULL,
1258 myaddr, NULL, memaddr, len, xfered_len);
1260 do_cleanups (cleanup);
1264 /* Using the set of read-only target sections of OPS, read live
1265 read-only memory. Note that the actual reads start from the
1266 top-most target again.
1268 For interface/parameters/return description see target.h,
1271 static enum target_xfer_status
1272 memory_xfer_live_readonly_partial (struct target_ops *ops,
1273 enum target_object object,
1274 gdb_byte *readbuf, ULONGEST memaddr,
1275 ULONGEST len, ULONGEST *xfered_len)
1277 struct target_section *secp;
1278 struct target_section_table *table;
1280 secp = target_section_by_addr (ops, memaddr);
1282 && (bfd_get_section_flags (secp->the_bfd_section->owner,
1283 secp->the_bfd_section)
1286 struct target_section *p;
1287 ULONGEST memend = memaddr + len;
1289 table = target_get_section_table (ops);
1291 for (p = table->sections; p < table->sections_end; p++)
1293 if (memaddr >= p->addr)
1295 if (memend <= p->endaddr)
1297 /* Entire transfer is within this section. */
1298 return target_read_live_memory (object, memaddr,
1299 readbuf, len, xfered_len);
1301 else if (memaddr >= p->endaddr)
1303 /* This section ends before the transfer starts. */
1308 /* This section overlaps the transfer. Just do half. */
1309 len = p->endaddr - memaddr;
1310 return target_read_live_memory (object, memaddr,
1311 readbuf, len, xfered_len);
1317 return TARGET_XFER_EOF;
1320 /* Read memory from more than one valid target. A core file, for
1321 instance, could have some of memory but delegate other bits to
1322 the target below it. So, we must manually try all targets. */
1324 static enum target_xfer_status
1325 raw_memory_xfer_partial (struct target_ops *ops, gdb_byte *readbuf,
1326 const gdb_byte *writebuf, ULONGEST memaddr, LONGEST len,
1327 ULONGEST *xfered_len)
1329 enum target_xfer_status res;
1333 res = ops->to_xfer_partial (ops, TARGET_OBJECT_MEMORY, NULL,
1334 readbuf, writebuf, memaddr, len,
1336 if (res == TARGET_XFER_OK)
1339 /* Stop if the target reports that the memory is not available. */
1340 if (res == TARGET_XFER_E_UNAVAILABLE)
1343 /* We want to continue past core files to executables, but not
1344 past a running target's memory. */
1345 if (ops->to_has_all_memory (ops))
1350 while (ops != NULL);
1355 /* Perform a partial memory transfer.
1356 For docs see target.h, to_xfer_partial. */
1358 static enum target_xfer_status
1359 memory_xfer_partial_1 (struct target_ops *ops, enum target_object object,
1360 gdb_byte *readbuf, const gdb_byte *writebuf, ULONGEST memaddr,
1361 ULONGEST len, ULONGEST *xfered_len)
1363 enum target_xfer_status res;
1365 struct mem_region *region;
1366 struct inferior *inf;
1368 /* For accesses to unmapped overlay sections, read directly from
1369 files. Must do this first, as MEMADDR may need adjustment. */
1370 if (readbuf != NULL && overlay_debugging)
1372 struct obj_section *section = find_pc_overlay (memaddr);
1374 if (pc_in_unmapped_range (memaddr, section))
1376 struct target_section_table *table
1377 = target_get_section_table (ops);
1378 const char *section_name = section->the_bfd_section->name;
1380 memaddr = overlay_mapped_address (memaddr, section);
1381 return section_table_xfer_memory_partial (readbuf, writebuf,
1382 memaddr, len, xfered_len,
1384 table->sections_end,
1389 /* Try the executable files, if "trust-readonly-sections" is set. */
1390 if (readbuf != NULL && trust_readonly)
1392 struct target_section *secp;
1393 struct target_section_table *table;
1395 secp = target_section_by_addr (ops, memaddr);
1397 && (bfd_get_section_flags (secp->the_bfd_section->owner,
1398 secp->the_bfd_section)
1401 table = target_get_section_table (ops);
1402 return section_table_xfer_memory_partial (readbuf, writebuf,
1403 memaddr, len, xfered_len,
1405 table->sections_end,
1410 /* If reading unavailable memory in the context of traceframes, and
1411 this address falls within a read-only section, fallback to
1412 reading from live memory. */
1413 if (readbuf != NULL && get_traceframe_number () != -1)
1415 VEC(mem_range_s) *available;
1417 /* If we fail to get the set of available memory, then the
1418 target does not support querying traceframe info, and so we
1419 attempt reading from the traceframe anyway (assuming the
1420 target implements the old QTro packet then). */
1421 if (traceframe_available_memory (&available, memaddr, len))
1423 struct cleanup *old_chain;
1425 old_chain = make_cleanup (VEC_cleanup(mem_range_s), &available);
1427 if (VEC_empty (mem_range_s, available)
1428 || VEC_index (mem_range_s, available, 0)->start != memaddr)
1430 /* Don't read into the traceframe's available
1432 if (!VEC_empty (mem_range_s, available))
1434 LONGEST oldlen = len;
1436 len = VEC_index (mem_range_s, available, 0)->start - memaddr;
1437 gdb_assert (len <= oldlen);
1440 do_cleanups (old_chain);
1442 /* This goes through the topmost target again. */
1443 res = memory_xfer_live_readonly_partial (ops, object,
1446 if (res == TARGET_XFER_OK)
1447 return TARGET_XFER_OK;
1450 /* No use trying further, we know some memory starting
1451 at MEMADDR isn't available. */
1453 return TARGET_XFER_E_UNAVAILABLE;
1457 /* Don't try to read more than how much is available, in
1458 case the target implements the deprecated QTro packet to
1459 cater for older GDBs (the target's knowledge of read-only
1460 sections may be outdated by now). */
1461 len = VEC_index (mem_range_s, available, 0)->length;
1463 do_cleanups (old_chain);
1467 /* Try GDB's internal data cache. */
1468 region = lookup_mem_region (memaddr);
1469 /* region->hi == 0 means there's no upper bound. */
1470 if (memaddr + len < region->hi || region->hi == 0)
1473 reg_len = region->hi - memaddr;
1475 switch (region->attrib.mode)
1478 if (writebuf != NULL)
1479 return TARGET_XFER_E_IO;
1483 if (readbuf != NULL)
1484 return TARGET_XFER_E_IO;
1488 /* We only support writing to flash during "load" for now. */
1489 if (writebuf != NULL)
1490 error (_("Writing to flash memory forbidden in this context"));
1494 return TARGET_XFER_E_IO;
1497 if (!ptid_equal (inferior_ptid, null_ptid))
1498 inf = find_inferior_pid (ptid_get_pid (inferior_ptid));
1503 /* The dcache reads whole cache lines; that doesn't play well
1504 with reading from a trace buffer, because reading outside of
1505 the collected memory range fails. */
1506 && get_traceframe_number () == -1
1507 && (region->attrib.cache
1508 || (stack_cache_enabled_p () && object == TARGET_OBJECT_STACK_MEMORY)
1509 || (code_cache_enabled_p () && object == TARGET_OBJECT_CODE_MEMORY)))
1511 DCACHE *dcache = target_dcache_get_or_init ();
1514 if (readbuf != NULL)
1515 l = dcache_xfer_memory (ops, dcache, memaddr, readbuf, reg_len, 0);
1517 /* FIXME drow/2006-08-09: If we're going to preserve const
1518 correctness dcache_xfer_memory should take readbuf and
1520 l = dcache_xfer_memory (ops, dcache, memaddr, (void *) writebuf,
1523 return TARGET_XFER_E_IO;
1526 *xfered_len = (ULONGEST) l;
1527 return TARGET_XFER_OK;
1531 /* If none of those methods found the memory we wanted, fall back
1532 to a target partial transfer. Normally a single call to
1533 to_xfer_partial is enough; if it doesn't recognize an object
1534 it will call the to_xfer_partial of the next target down.
1535 But for memory this won't do. Memory is the only target
1536 object which can be read from more than one valid target.
1537 A core file, for instance, could have some of memory but
1538 delegate other bits to the target below it. So, we must
1539 manually try all targets. */
1541 res = raw_memory_xfer_partial (ops, readbuf, writebuf, memaddr, reg_len,
1544 /* Make sure the cache gets updated no matter what - if we are writing
1545 to the stack. Even if this write is not tagged as such, we still need
1546 to update the cache. */
1548 if (res == TARGET_XFER_OK
1551 && target_dcache_init_p ()
1552 && !region->attrib.cache
1553 && ((stack_cache_enabled_p () && object != TARGET_OBJECT_STACK_MEMORY)
1554 || (code_cache_enabled_p () && object != TARGET_OBJECT_CODE_MEMORY)))
1556 DCACHE *dcache = target_dcache_get ();
1558 dcache_update (dcache, memaddr, (void *) writebuf, reg_len);
1561 /* If we still haven't got anything, return the last error. We
1566 /* Perform a partial memory transfer. For docs see target.h,
1569 static enum target_xfer_status
1570 memory_xfer_partial (struct target_ops *ops, enum target_object object,
1571 gdb_byte *readbuf, const gdb_byte *writebuf,
1572 ULONGEST memaddr, ULONGEST len, ULONGEST *xfered_len)
1574 enum target_xfer_status res;
1576 /* Zero length requests are ok and require no work. */
1578 return TARGET_XFER_EOF;
1580 /* Fill in READBUF with breakpoint shadows, or WRITEBUF with
1581 breakpoint insns, thus hiding out from higher layers whether
1582 there are software breakpoints inserted in the code stream. */
1583 if (readbuf != NULL)
1585 res = memory_xfer_partial_1 (ops, object, readbuf, NULL, memaddr, len,
1588 if (res == TARGET_XFER_OK && !show_memory_breakpoints)
1589 breakpoint_xfer_memory (readbuf, NULL, NULL, memaddr, res);
1594 struct cleanup *old_chain;
1596 /* A large write request is likely to be partially satisfied
1597 by memory_xfer_partial_1. We will continually malloc
1598 and free a copy of the entire write request for breakpoint
1599 shadow handling even though we only end up writing a small
1600 subset of it. Cap writes to 4KB to mitigate this. */
1601 len = min (4096, len);
1603 buf = xmalloc (len);
1604 old_chain = make_cleanup (xfree, buf);
1605 memcpy (buf, writebuf, len);
1607 breakpoint_xfer_memory (NULL, buf, writebuf, memaddr, len);
1608 res = memory_xfer_partial_1 (ops, object, NULL, buf, memaddr, len,
1611 do_cleanups (old_chain);
1618 restore_show_memory_breakpoints (void *arg)
1620 show_memory_breakpoints = (uintptr_t) arg;
1624 make_show_memory_breakpoints_cleanup (int show)
1626 int current = show_memory_breakpoints;
1628 show_memory_breakpoints = show;
1629 return make_cleanup (restore_show_memory_breakpoints,
1630 (void *) (uintptr_t) current);
1633 /* For docs see target.h, to_xfer_partial. */
1635 enum target_xfer_status
1636 target_xfer_partial (struct target_ops *ops,
1637 enum target_object object, const char *annex,
1638 gdb_byte *readbuf, const gdb_byte *writebuf,
1639 ULONGEST offset, ULONGEST len,
1640 ULONGEST *xfered_len)
1642 enum target_xfer_status retval;
1644 gdb_assert (ops->to_xfer_partial != NULL);
1646 /* Transfer is done when LEN is zero. */
1648 return TARGET_XFER_EOF;
1650 if (writebuf && !may_write_memory)
1651 error (_("Writing to memory is not allowed (addr %s, len %s)"),
1652 core_addr_to_string_nz (offset), plongest (len));
1656 /* If this is a memory transfer, let the memory-specific code
1657 have a look at it instead. Memory transfers are more
1659 if (object == TARGET_OBJECT_MEMORY || object == TARGET_OBJECT_STACK_MEMORY
1660 || object == TARGET_OBJECT_CODE_MEMORY)
1661 retval = memory_xfer_partial (ops, object, readbuf,
1662 writebuf, offset, len, xfered_len);
1663 else if (object == TARGET_OBJECT_RAW_MEMORY)
1665 /* Request the normal memory object from other layers. */
1666 retval = raw_memory_xfer_partial (ops, readbuf, writebuf, offset, len,
1670 retval = ops->to_xfer_partial (ops, object, annex, readbuf,
1671 writebuf, offset, len, xfered_len);
1675 const unsigned char *myaddr = NULL;
1677 fprintf_unfiltered (gdb_stdlog,
1678 "%s:target_xfer_partial "
1679 "(%d, %s, %s, %s, %s, %s) = %d, %s",
1682 (annex ? annex : "(null)"),
1683 host_address_to_string (readbuf),
1684 host_address_to_string (writebuf),
1685 core_addr_to_string_nz (offset),
1686 pulongest (len), retval,
1687 pulongest (*xfered_len));
1693 if (retval == TARGET_XFER_OK && myaddr != NULL)
1697 fputs_unfiltered (", bytes =", gdb_stdlog);
1698 for (i = 0; i < *xfered_len; i++)
1700 if ((((intptr_t) &(myaddr[i])) & 0xf) == 0)
1702 if (targetdebug < 2 && i > 0)
1704 fprintf_unfiltered (gdb_stdlog, " ...");
1707 fprintf_unfiltered (gdb_stdlog, "\n");
1710 fprintf_unfiltered (gdb_stdlog, " %02x", myaddr[i] & 0xff);
1714 fputc_unfiltered ('\n', gdb_stdlog);
1717 /* Check implementations of to_xfer_partial update *XFERED_LEN
1718 properly. Do assertion after printing debug messages, so that we
1719 can find more clues on assertion failure from debugging messages. */
1720 if (retval == TARGET_XFER_OK || retval == TARGET_XFER_E_UNAVAILABLE)
1721 gdb_assert (*xfered_len > 0);
1726 /* Read LEN bytes of target memory at address MEMADDR, placing the
1727 results in GDB's memory at MYADDR. Returns either 0 for success or
1728 TARGET_XFER_E_IO if any error occurs.
1730 If an error occurs, no guarantee is made about the contents of the data at
1731 MYADDR. In particular, the caller should not depend upon partial reads
1732 filling the buffer with good data. There is no way for the caller to know
1733 how much good data might have been transfered anyway. Callers that can
1734 deal with partial reads should call target_read (which will retry until
1735 it makes no progress, and then return how much was transferred). */
1738 target_read_memory (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len)
1740 /* Dispatch to the topmost target, not the flattened current_target.
1741 Memory accesses check target->to_has_(all_)memory, and the
1742 flattened target doesn't inherit those. */
1743 if (target_read (current_target.beneath, TARGET_OBJECT_MEMORY, NULL,
1744 myaddr, memaddr, len) == len)
1747 return TARGET_XFER_E_IO;
1750 /* Like target_read_memory, but specify explicitly that this is a read
1751 from the target's raw memory. That is, this read bypasses the
1752 dcache, breakpoint shadowing, etc. */
1755 target_read_raw_memory (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len)
1757 /* See comment in target_read_memory about why the request starts at
1758 current_target.beneath. */
1759 if (target_read (current_target.beneath, TARGET_OBJECT_RAW_MEMORY, NULL,
1760 myaddr, memaddr, len) == len)
1763 return TARGET_XFER_E_IO;
1766 /* Like target_read_memory, but specify explicitly that this is a read from
1767 the target's stack. This may trigger different cache behavior. */
1770 target_read_stack (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len)
1772 /* See comment in target_read_memory about why the request starts at
1773 current_target.beneath. */
1774 if (target_read (current_target.beneath, TARGET_OBJECT_STACK_MEMORY, NULL,
1775 myaddr, memaddr, len) == len)
1778 return TARGET_XFER_E_IO;
1781 /* Like target_read_memory, but specify explicitly that this is a read from
1782 the target's code. This may trigger different cache behavior. */
1785 target_read_code (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len)
1787 /* See comment in target_read_memory about why the request starts at
1788 current_target.beneath. */
1789 if (target_read (current_target.beneath, TARGET_OBJECT_CODE_MEMORY, NULL,
1790 myaddr, memaddr, len) == len)
1793 return TARGET_XFER_E_IO;
1796 /* Write LEN bytes from MYADDR to target memory at address MEMADDR.
1797 Returns either 0 for success or TARGET_XFER_E_IO if any
1798 error occurs. If an error occurs, no guarantee is made about how
1799 much data got written. Callers that can deal with partial writes
1800 should call target_write. */
1803 target_write_memory (CORE_ADDR memaddr, const gdb_byte *myaddr, ssize_t len)
1805 /* See comment in target_read_memory about why the request starts at
1806 current_target.beneath. */
1807 if (target_write (current_target.beneath, TARGET_OBJECT_MEMORY, NULL,
1808 myaddr, memaddr, len) == len)
1811 return TARGET_XFER_E_IO;
1814 /* Write LEN bytes from MYADDR to target raw memory at address
1815 MEMADDR. Returns either 0 for success or TARGET_XFER_E_IO
1816 if any error occurs. If an error occurs, no guarantee is made
1817 about how much data got written. Callers that can deal with
1818 partial writes should call target_write. */
1821 target_write_raw_memory (CORE_ADDR memaddr, const gdb_byte *myaddr, ssize_t len)
1823 /* See comment in target_read_memory about why the request starts at
1824 current_target.beneath. */
1825 if (target_write (current_target.beneath, TARGET_OBJECT_RAW_MEMORY, NULL,
1826 myaddr, memaddr, len) == len)
1829 return TARGET_XFER_E_IO;
1832 /* Fetch the target's memory map. */
1835 target_memory_map (void)
1837 VEC(mem_region_s) *result;
1838 struct mem_region *last_one, *this_one;
1840 struct target_ops *t;
1843 fprintf_unfiltered (gdb_stdlog, "target_memory_map ()\n");
1845 for (t = current_target.beneath; t != NULL; t = t->beneath)
1846 if (t->to_memory_map != NULL)
1852 result = t->to_memory_map (t);
1856 qsort (VEC_address (mem_region_s, result),
1857 VEC_length (mem_region_s, result),
1858 sizeof (struct mem_region), mem_region_cmp);
1860 /* Check that regions do not overlap. Simultaneously assign
1861 a numbering for the "mem" commands to use to refer to
1864 for (ix = 0; VEC_iterate (mem_region_s, result, ix, this_one); ix++)
1866 this_one->number = ix;
1868 if (last_one && last_one->hi > this_one->lo)
1870 warning (_("Overlapping regions in memory map: ignoring"));
1871 VEC_free (mem_region_s, result);
1874 last_one = this_one;
1881 target_flash_erase (ULONGEST address, LONGEST length)
1883 struct target_ops *t;
1885 for (t = current_target.beneath; t != NULL; t = t->beneath)
1886 if (t->to_flash_erase != NULL)
1889 fprintf_unfiltered (gdb_stdlog, "target_flash_erase (%s, %s)\n",
1890 hex_string (address), phex (length, 0));
1891 t->to_flash_erase (t, address, length);
1899 target_flash_done (void)
1901 struct target_ops *t;
1903 for (t = current_target.beneath; t != NULL; t = t->beneath)
1904 if (t->to_flash_done != NULL)
1907 fprintf_unfiltered (gdb_stdlog, "target_flash_done\n");
1908 t->to_flash_done (t);
1916 show_trust_readonly (struct ui_file *file, int from_tty,
1917 struct cmd_list_element *c, const char *value)
1919 fprintf_filtered (file,
1920 _("Mode for reading from readonly sections is %s.\n"),
1924 /* More generic transfers. */
1926 static enum target_xfer_status
1927 default_xfer_partial (struct target_ops *ops, enum target_object object,
1928 const char *annex, gdb_byte *readbuf,
1929 const gdb_byte *writebuf, ULONGEST offset, ULONGEST len,
1930 ULONGEST *xfered_len)
1932 if (object == TARGET_OBJECT_MEMORY
1933 && ops->deprecated_xfer_memory != NULL)
1934 /* If available, fall back to the target's
1935 "deprecated_xfer_memory" method. */
1940 if (writebuf != NULL)
1942 void *buffer = xmalloc (len);
1943 struct cleanup *cleanup = make_cleanup (xfree, buffer);
1945 memcpy (buffer, writebuf, len);
1946 xfered = ops->deprecated_xfer_memory (offset, buffer, len,
1947 1/*write*/, NULL, ops);
1948 do_cleanups (cleanup);
1950 if (readbuf != NULL)
1951 xfered = ops->deprecated_xfer_memory (offset, readbuf, len,
1952 0/*read*/, NULL, ops);
1955 *xfered_len = (ULONGEST) xfered;
1956 return TARGET_XFER_E_IO;
1958 else if (xfered == 0 && errno == 0)
1959 /* "deprecated_xfer_memory" uses 0, cross checked against
1960 ERRNO as one indication of an error. */
1961 return TARGET_XFER_EOF;
1963 return TARGET_XFER_E_IO;
1967 gdb_assert (ops->beneath != NULL);
1968 return ops->beneath->to_xfer_partial (ops->beneath, object, annex,
1969 readbuf, writebuf, offset, len,
1974 /* Target vector read/write partial wrapper functions. */
1976 static enum target_xfer_status
1977 target_read_partial (struct target_ops *ops,
1978 enum target_object object,
1979 const char *annex, gdb_byte *buf,
1980 ULONGEST offset, ULONGEST len,
1981 ULONGEST *xfered_len)
1983 return target_xfer_partial (ops, object, annex, buf, NULL, offset, len,
1987 static enum target_xfer_status
1988 target_write_partial (struct target_ops *ops,
1989 enum target_object object,
1990 const char *annex, const gdb_byte *buf,
1991 ULONGEST offset, LONGEST len, ULONGEST *xfered_len)
1993 return target_xfer_partial (ops, object, annex, NULL, buf, offset, len,
1997 /* Wrappers to perform the full transfer. */
1999 /* For docs on target_read see target.h. */
2002 target_read (struct target_ops *ops,
2003 enum target_object object,
2004 const char *annex, gdb_byte *buf,
2005 ULONGEST offset, LONGEST len)
2009 while (xfered < len)
2011 ULONGEST xfered_len;
2012 enum target_xfer_status status;
2014 status = target_read_partial (ops, object, annex,
2015 (gdb_byte *) buf + xfered,
2016 offset + xfered, len - xfered,
2019 /* Call an observer, notifying them of the xfer progress? */
2020 if (status == TARGET_XFER_EOF)
2022 else if (status == TARGET_XFER_OK)
2024 xfered += xfered_len;
2034 /* Assuming that the entire [begin, end) range of memory cannot be
2035 read, try to read whatever subrange is possible to read.
2037 The function returns, in RESULT, either zero or one memory block.
2038 If there's a readable subrange at the beginning, it is completely
2039 read and returned. Any further readable subrange will not be read.
2040 Otherwise, if there's a readable subrange at the end, it will be
2041 completely read and returned. Any readable subranges before it
2042 (obviously, not starting at the beginning), will be ignored. In
2043 other cases -- either no readable subrange, or readable subrange(s)
2044 that is neither at the beginning, or end, nothing is returned.
2046 The purpose of this function is to handle a read across a boundary
2047 of accessible memory in a case when memory map is not available.
2048 The above restrictions are fine for this case, but will give
2049 incorrect results if the memory is 'patchy'. However, supporting
2050 'patchy' memory would require trying to read every single byte,
2051 and it seems unacceptable solution. Explicit memory map is
2052 recommended for this case -- and target_read_memory_robust will
2053 take care of reading multiple ranges then. */
2056 read_whatever_is_readable (struct target_ops *ops,
2057 ULONGEST begin, ULONGEST end,
2058 VEC(memory_read_result_s) **result)
2060 gdb_byte *buf = xmalloc (end - begin);
2061 ULONGEST current_begin = begin;
2062 ULONGEST current_end = end;
2064 memory_read_result_s r;
2065 ULONGEST xfered_len;
2067 /* If we previously failed to read 1 byte, nothing can be done here. */
2068 if (end - begin <= 1)
2074 /* Check that either first or the last byte is readable, and give up
2075 if not. This heuristic is meant to permit reading accessible memory
2076 at the boundary of accessible region. */
2077 if (target_read_partial (ops, TARGET_OBJECT_MEMORY, NULL,
2078 buf, begin, 1, &xfered_len) == TARGET_XFER_OK)
2083 else if (target_read_partial (ops, TARGET_OBJECT_MEMORY, NULL,
2084 buf + (end-begin) - 1, end - 1, 1,
2085 &xfered_len) == TARGET_XFER_OK)
2096 /* Loop invariant is that the [current_begin, current_end) was previously
2097 found to be not readable as a whole.
2099 Note loop condition -- if the range has 1 byte, we can't divide the range
2100 so there's no point trying further. */
2101 while (current_end - current_begin > 1)
2103 ULONGEST first_half_begin, first_half_end;
2104 ULONGEST second_half_begin, second_half_end;
2106 ULONGEST middle = current_begin + (current_end - current_begin)/2;
2110 first_half_begin = current_begin;
2111 first_half_end = middle;
2112 second_half_begin = middle;
2113 second_half_end = current_end;
2117 first_half_begin = middle;
2118 first_half_end = current_end;
2119 second_half_begin = current_begin;
2120 second_half_end = middle;
2123 xfer = target_read (ops, TARGET_OBJECT_MEMORY, NULL,
2124 buf + (first_half_begin - begin),
2126 first_half_end - first_half_begin);
2128 if (xfer == first_half_end - first_half_begin)
2130 /* This half reads up fine. So, the error must be in the
2132 current_begin = second_half_begin;
2133 current_end = second_half_end;
2137 /* This half is not readable. Because we've tried one byte, we
2138 know some part of this half if actually redable. Go to the next
2139 iteration to divide again and try to read.
2141 We don't handle the other half, because this function only tries
2142 to read a single readable subrange. */
2143 current_begin = first_half_begin;
2144 current_end = first_half_end;
2150 /* The [begin, current_begin) range has been read. */
2152 r.end = current_begin;
2157 /* The [current_end, end) range has been read. */
2158 LONGEST rlen = end - current_end;
2160 r.data = xmalloc (rlen);
2161 memcpy (r.data, buf + current_end - begin, rlen);
2162 r.begin = current_end;
2166 VEC_safe_push(memory_read_result_s, (*result), &r);
2170 free_memory_read_result_vector (void *x)
2172 VEC(memory_read_result_s) *v = x;
2173 memory_read_result_s *current;
2176 for (ix = 0; VEC_iterate (memory_read_result_s, v, ix, current); ++ix)
2178 xfree (current->data);
2180 VEC_free (memory_read_result_s, v);
2183 VEC(memory_read_result_s) *
2184 read_memory_robust (struct target_ops *ops, ULONGEST offset, LONGEST len)
2186 VEC(memory_read_result_s) *result = 0;
2189 while (xfered < len)
2191 struct mem_region *region = lookup_mem_region (offset + xfered);
2194 /* If there is no explicit region, a fake one should be created. */
2195 gdb_assert (region);
2197 if (region->hi == 0)
2198 rlen = len - xfered;
2200 rlen = region->hi - offset;
2202 if (region->attrib.mode == MEM_NONE || region->attrib.mode == MEM_WO)
2204 /* Cannot read this region. Note that we can end up here only
2205 if the region is explicitly marked inaccessible, or
2206 'inaccessible-by-default' is in effect. */
2211 LONGEST to_read = min (len - xfered, rlen);
2212 gdb_byte *buffer = (gdb_byte *)xmalloc (to_read);
2214 LONGEST xfer = target_read (ops, TARGET_OBJECT_MEMORY, NULL,
2215 (gdb_byte *) buffer,
2216 offset + xfered, to_read);
2217 /* Call an observer, notifying them of the xfer progress? */
2220 /* Got an error reading full chunk. See if maybe we can read
2223 read_whatever_is_readable (ops, offset + xfered,
2224 offset + xfered + to_read, &result);
2229 struct memory_read_result r;
2231 r.begin = offset + xfered;
2232 r.end = r.begin + xfer;
2233 VEC_safe_push (memory_read_result_s, result, &r);
2243 /* An alternative to target_write with progress callbacks. */
2246 target_write_with_progress (struct target_ops *ops,
2247 enum target_object object,
2248 const char *annex, const gdb_byte *buf,
2249 ULONGEST offset, LONGEST len,
2250 void (*progress) (ULONGEST, void *), void *baton)
2254 /* Give the progress callback a chance to set up. */
2256 (*progress) (0, baton);
2258 while (xfered < len)
2260 ULONGEST xfered_len;
2261 enum target_xfer_status status;
2263 status = target_write_partial (ops, object, annex,
2264 (gdb_byte *) buf + xfered,
2265 offset + xfered, len - xfered,
2268 if (status == TARGET_XFER_EOF)
2270 if (TARGET_XFER_STATUS_ERROR_P (status))
2273 gdb_assert (status == TARGET_XFER_OK);
2275 (*progress) (xfered_len, baton);
2277 xfered += xfered_len;
2283 /* For docs on target_write see target.h. */
2286 target_write (struct target_ops *ops,
2287 enum target_object object,
2288 const char *annex, const gdb_byte *buf,
2289 ULONGEST offset, LONGEST len)
2291 return target_write_with_progress (ops, object, annex, buf, offset, len,
2295 /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return
2296 the size of the transferred data. PADDING additional bytes are
2297 available in *BUF_P. This is a helper function for
2298 target_read_alloc; see the declaration of that function for more
2302 target_read_alloc_1 (struct target_ops *ops, enum target_object object,
2303 const char *annex, gdb_byte **buf_p, int padding)
2305 size_t buf_alloc, buf_pos;
2308 /* This function does not have a length parameter; it reads the
2309 entire OBJECT). Also, it doesn't support objects fetched partly
2310 from one target and partly from another (in a different stratum,
2311 e.g. a core file and an executable). Both reasons make it
2312 unsuitable for reading memory. */
2313 gdb_assert (object != TARGET_OBJECT_MEMORY);
2315 /* Start by reading up to 4K at a time. The target will throttle
2316 this number down if necessary. */
2318 buf = xmalloc (buf_alloc);
2322 ULONGEST xfered_len;
2323 enum target_xfer_status status;
2325 status = target_read_partial (ops, object, annex, &buf[buf_pos],
2326 buf_pos, buf_alloc - buf_pos - padding,
2329 if (status == TARGET_XFER_EOF)
2331 /* Read all there was. */
2338 else if (status != TARGET_XFER_OK)
2340 /* An error occurred. */
2342 return TARGET_XFER_E_IO;
2345 buf_pos += xfered_len;
2347 /* If the buffer is filling up, expand it. */
2348 if (buf_alloc < buf_pos * 2)
2351 buf = xrealloc (buf, buf_alloc);
2358 /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return
2359 the size of the transferred data. See the declaration in "target.h"
2360 function for more information about the return value. */
2363 target_read_alloc (struct target_ops *ops, enum target_object object,
2364 const char *annex, gdb_byte **buf_p)
2366 return target_read_alloc_1 (ops, object, annex, buf_p, 0);
2369 /* Read OBJECT/ANNEX using OPS. The result is NUL-terminated and
2370 returned as a string, allocated using xmalloc. If an error occurs
2371 or the transfer is unsupported, NULL is returned. Empty objects
2372 are returned as allocated but empty strings. A warning is issued
2373 if the result contains any embedded NUL bytes. */
2376 target_read_stralloc (struct target_ops *ops, enum target_object object,
2381 LONGEST i, transferred;
2383 transferred = target_read_alloc_1 (ops, object, annex, &buffer, 1);
2384 bufstr = (char *) buffer;
2386 if (transferred < 0)
2389 if (transferred == 0)
2390 return xstrdup ("");
2392 bufstr[transferred] = 0;
2394 /* Check for embedded NUL bytes; but allow trailing NULs. */
2395 for (i = strlen (bufstr); i < transferred; i++)
2398 warning (_("target object %d, annex %s, "
2399 "contained unexpected null characters"),
2400 (int) object, annex ? annex : "(none)");
2407 /* Memory transfer methods. */
2410 get_target_memory (struct target_ops *ops, CORE_ADDR addr, gdb_byte *buf,
2413 /* This method is used to read from an alternate, non-current
2414 target. This read must bypass the overlay support (as symbols
2415 don't match this target), and GDB's internal cache (wrong cache
2416 for this target). */
2417 if (target_read (ops, TARGET_OBJECT_RAW_MEMORY, NULL, buf, addr, len)
2419 memory_error (TARGET_XFER_E_IO, addr);
2423 get_target_memory_unsigned (struct target_ops *ops, CORE_ADDR addr,
2424 int len, enum bfd_endian byte_order)
2426 gdb_byte buf[sizeof (ULONGEST)];
2428 gdb_assert (len <= sizeof (buf));
2429 get_target_memory (ops, addr, buf, len);
2430 return extract_unsigned_integer (buf, len, byte_order);
2436 target_insert_breakpoint (struct gdbarch *gdbarch,
2437 struct bp_target_info *bp_tgt)
2439 if (!may_insert_breakpoints)
2441 warning (_("May not insert breakpoints"));
2445 return current_target.to_insert_breakpoint (¤t_target,
2452 target_remove_breakpoint (struct gdbarch *gdbarch,
2453 struct bp_target_info *bp_tgt)
2455 /* This is kind of a weird case to handle, but the permission might
2456 have been changed after breakpoints were inserted - in which case
2457 we should just take the user literally and assume that any
2458 breakpoints should be left in place. */
2459 if (!may_insert_breakpoints)
2461 warning (_("May not remove breakpoints"));
2465 return current_target.to_remove_breakpoint (¤t_target,
2470 target_info (char *args, int from_tty)
2472 struct target_ops *t;
2473 int has_all_mem = 0;
2475 if (symfile_objfile != NULL)
2476 printf_unfiltered (_("Symbols from \"%s\".\n"),
2477 objfile_name (symfile_objfile));
2479 for (t = target_stack; t != NULL; t = t->beneath)
2481 if (!(*t->to_has_memory) (t))
2484 if ((int) (t->to_stratum) <= (int) dummy_stratum)
2487 printf_unfiltered (_("\tWhile running this, "
2488 "GDB does not access memory from...\n"));
2489 printf_unfiltered ("%s:\n", t->to_longname);
2490 (t->to_files_info) (t);
2491 has_all_mem = (*t->to_has_all_memory) (t);
2495 /* This function is called before any new inferior is created, e.g.
2496 by running a program, attaching, or connecting to a target.
2497 It cleans up any state from previous invocations which might
2498 change between runs. This is a subset of what target_preopen
2499 resets (things which might change between targets). */
2502 target_pre_inferior (int from_tty)
2504 /* Clear out solib state. Otherwise the solib state of the previous
2505 inferior might have survived and is entirely wrong for the new
2506 target. This has been observed on GNU/Linux using glibc 2.3. How
2518 Cannot access memory at address 0xdeadbeef
2521 /* In some OSs, the shared library list is the same/global/shared
2522 across inferiors. If code is shared between processes, so are
2523 memory regions and features. */
2524 if (!gdbarch_has_global_solist (target_gdbarch ()))
2526 no_shared_libraries (NULL, from_tty);
2528 invalidate_target_mem_regions ();
2530 target_clear_description ();
2533 agent_capability_invalidate ();
2536 /* Callback for iterate_over_inferiors. Gets rid of the given
2540 dispose_inferior (struct inferior *inf, void *args)
2542 struct thread_info *thread;
2544 thread = any_thread_of_process (inf->pid);
2547 switch_to_thread (thread->ptid);
2549 /* Core inferiors actually should be detached, not killed. */
2550 if (target_has_execution)
2553 target_detach (NULL, 0);
2559 /* This is to be called by the open routine before it does
2563 target_preopen (int from_tty)
2567 if (have_inferiors ())
2570 || !have_live_inferiors ()
2571 || query (_("A program is being debugged already. Kill it? ")))
2572 iterate_over_inferiors (dispose_inferior, NULL);
2574 error (_("Program not killed."));
2577 /* Calling target_kill may remove the target from the stack. But if
2578 it doesn't (which seems like a win for UDI), remove it now. */
2579 /* Leave the exec target, though. The user may be switching from a
2580 live process to a core of the same program. */
2581 pop_all_targets_above (file_stratum);
2583 target_pre_inferior (from_tty);
2586 /* Detach a target after doing deferred register stores. */
2589 target_detach (const char *args, int from_tty)
2591 struct target_ops* t;
2593 if (gdbarch_has_global_breakpoints (target_gdbarch ()))
2594 /* Don't remove global breakpoints here. They're removed on
2595 disconnection from the target. */
2598 /* If we're in breakpoints-always-inserted mode, have to remove
2599 them before detaching. */
2600 remove_breakpoints_pid (ptid_get_pid (inferior_ptid));
2602 prepare_for_detach ();
2604 current_target.to_detach (¤t_target, args, from_tty);
2606 fprintf_unfiltered (gdb_stdlog, "target_detach (%s, %d)\n",
2611 target_disconnect (char *args, int from_tty)
2613 struct target_ops *t;
2615 /* If we're in breakpoints-always-inserted mode or if breakpoints
2616 are global across processes, we have to remove them before
2618 remove_breakpoints ();
2620 for (t = current_target.beneath; t != NULL; t = t->beneath)
2621 if (t->to_disconnect != NULL)
2624 fprintf_unfiltered (gdb_stdlog, "target_disconnect (%s, %d)\n",
2626 t->to_disconnect (t, args, from_tty);
2634 target_wait (ptid_t ptid, struct target_waitstatus *status, int options)
2636 struct target_ops *t;
2637 ptid_t retval = (current_target.to_wait) (¤t_target, ptid,
2642 char *status_string;
2643 char *options_string;
2645 status_string = target_waitstatus_to_string (status);
2646 options_string = target_options_to_string (options);
2647 fprintf_unfiltered (gdb_stdlog,
2648 "target_wait (%d, status, options={%s})"
2650 ptid_get_pid (ptid), options_string,
2651 ptid_get_pid (retval), status_string);
2652 xfree (status_string);
2653 xfree (options_string);
2660 target_pid_to_str (ptid_t ptid)
2662 struct target_ops *t;
2664 for (t = current_target.beneath; t != NULL; t = t->beneath)
2666 if (t->to_pid_to_str != NULL)
2667 return (*t->to_pid_to_str) (t, ptid);
2670 return normal_pid_to_str (ptid);
2674 target_thread_name (struct thread_info *info)
2676 struct target_ops *t;
2678 for (t = current_target.beneath; t != NULL; t = t->beneath)
2680 if (t->to_thread_name != NULL)
2681 return (*t->to_thread_name) (t, info);
2688 target_resume (ptid_t ptid, int step, enum gdb_signal signal)
2690 struct target_ops *t;
2692 target_dcache_invalidate ();
2694 current_target.to_resume (¤t_target, ptid, step, signal);
2696 fprintf_unfiltered (gdb_stdlog, "target_resume (%d, %s, %s)\n",
2697 ptid_get_pid (ptid),
2698 step ? "step" : "continue",
2699 gdb_signal_to_name (signal));
2701 registers_changed_ptid (ptid);
2702 set_executing (ptid, 1);
2703 set_running (ptid, 1);
2704 clear_inline_frame_state (ptid);
2708 target_pass_signals (int numsigs, unsigned char *pass_signals)
2710 struct target_ops *t;
2712 for (t = current_target.beneath; t != NULL; t = t->beneath)
2714 if (t->to_pass_signals != NULL)
2720 fprintf_unfiltered (gdb_stdlog, "target_pass_signals (%d, {",
2723 for (i = 0; i < numsigs; i++)
2724 if (pass_signals[i])
2725 fprintf_unfiltered (gdb_stdlog, " %s",
2726 gdb_signal_to_name (i));
2728 fprintf_unfiltered (gdb_stdlog, " })\n");
2731 (*t->to_pass_signals) (t, numsigs, pass_signals);
2738 target_program_signals (int numsigs, unsigned char *program_signals)
2740 struct target_ops *t;
2742 for (t = current_target.beneath; t != NULL; t = t->beneath)
2744 if (t->to_program_signals != NULL)
2750 fprintf_unfiltered (gdb_stdlog, "target_program_signals (%d, {",
2753 for (i = 0; i < numsigs; i++)
2754 if (program_signals[i])
2755 fprintf_unfiltered (gdb_stdlog, " %s",
2756 gdb_signal_to_name (i));
2758 fprintf_unfiltered (gdb_stdlog, " })\n");
2761 (*t->to_program_signals) (t, numsigs, program_signals);
2767 /* Look through the list of possible targets for a target that can
2771 target_follow_fork (int follow_child, int detach_fork)
2773 struct target_ops *t;
2775 for (t = current_target.beneath; t != NULL; t = t->beneath)
2777 if (t->to_follow_fork != NULL)
2779 int retval = t->to_follow_fork (t, follow_child, detach_fork);
2782 fprintf_unfiltered (gdb_stdlog,
2783 "target_follow_fork (%d, %d) = %d\n",
2784 follow_child, detach_fork, retval);
2789 /* Some target returned a fork event, but did not know how to follow it. */
2790 internal_error (__FILE__, __LINE__,
2791 _("could not find a target to follow fork"));
2795 target_mourn_inferior (void)
2797 struct target_ops *t;
2799 for (t = current_target.beneath; t != NULL; t = t->beneath)
2801 if (t->to_mourn_inferior != NULL)
2803 t->to_mourn_inferior (t);
2805 fprintf_unfiltered (gdb_stdlog, "target_mourn_inferior ()\n");
2807 /* We no longer need to keep handles on any of the object files.
2808 Make sure to release them to avoid unnecessarily locking any
2809 of them while we're not actually debugging. */
2810 bfd_cache_close_all ();
2816 internal_error (__FILE__, __LINE__,
2817 _("could not find a target to follow mourn inferior"));
2820 /* Look for a target which can describe architectural features, starting
2821 from TARGET. If we find one, return its description. */
2823 const struct target_desc *
2824 target_read_description (struct target_ops *target)
2826 struct target_ops *t;
2828 for (t = target; t != NULL; t = t->beneath)
2829 if (t->to_read_description != NULL)
2831 const struct target_desc *tdesc;
2833 tdesc = t->to_read_description (t);
2841 /* The default implementation of to_search_memory.
2842 This implements a basic search of memory, reading target memory and
2843 performing the search here (as opposed to performing the search in on the
2844 target side with, for example, gdbserver). */
2847 simple_search_memory (struct target_ops *ops,
2848 CORE_ADDR start_addr, ULONGEST search_space_len,
2849 const gdb_byte *pattern, ULONGEST pattern_len,
2850 CORE_ADDR *found_addrp)
2852 /* NOTE: also defined in find.c testcase. */
2853 #define SEARCH_CHUNK_SIZE 16000
2854 const unsigned chunk_size = SEARCH_CHUNK_SIZE;
2855 /* Buffer to hold memory contents for searching. */
2856 gdb_byte *search_buf;
2857 unsigned search_buf_size;
2858 struct cleanup *old_cleanups;
2860 search_buf_size = chunk_size + pattern_len - 1;
2862 /* No point in trying to allocate a buffer larger than the search space. */
2863 if (search_space_len < search_buf_size)
2864 search_buf_size = search_space_len;
2866 search_buf = malloc (search_buf_size);
2867 if (search_buf == NULL)
2868 error (_("Unable to allocate memory to perform the search."));
2869 old_cleanups = make_cleanup (free_current_contents, &search_buf);
2871 /* Prime the search buffer. */
2873 if (target_read (ops, TARGET_OBJECT_MEMORY, NULL,
2874 search_buf, start_addr, search_buf_size) != search_buf_size)
2876 warning (_("Unable to access %s bytes of target "
2877 "memory at %s, halting search."),
2878 pulongest (search_buf_size), hex_string (start_addr));
2879 do_cleanups (old_cleanups);
2883 /* Perform the search.
2885 The loop is kept simple by allocating [N + pattern-length - 1] bytes.
2886 When we've scanned N bytes we copy the trailing bytes to the start and
2887 read in another N bytes. */
2889 while (search_space_len >= pattern_len)
2891 gdb_byte *found_ptr;
2892 unsigned nr_search_bytes = min (search_space_len, search_buf_size);
2894 found_ptr = memmem (search_buf, nr_search_bytes,
2895 pattern, pattern_len);
2897 if (found_ptr != NULL)
2899 CORE_ADDR found_addr = start_addr + (found_ptr - search_buf);
2901 *found_addrp = found_addr;
2902 do_cleanups (old_cleanups);
2906 /* Not found in this chunk, skip to next chunk. */
2908 /* Don't let search_space_len wrap here, it's unsigned. */
2909 if (search_space_len >= chunk_size)
2910 search_space_len -= chunk_size;
2912 search_space_len = 0;
2914 if (search_space_len >= pattern_len)
2916 unsigned keep_len = search_buf_size - chunk_size;
2917 CORE_ADDR read_addr = start_addr + chunk_size + keep_len;
2920 /* Copy the trailing part of the previous iteration to the front
2921 of the buffer for the next iteration. */
2922 gdb_assert (keep_len == pattern_len - 1);
2923 memcpy (search_buf, search_buf + chunk_size, keep_len);
2925 nr_to_read = min (search_space_len - keep_len, chunk_size);
2927 if (target_read (ops, TARGET_OBJECT_MEMORY, NULL,
2928 search_buf + keep_len, read_addr,
2929 nr_to_read) != nr_to_read)
2931 warning (_("Unable to access %s bytes of target "
2932 "memory at %s, halting search."),
2933 plongest (nr_to_read),
2934 hex_string (read_addr));
2935 do_cleanups (old_cleanups);
2939 start_addr += chunk_size;
2945 do_cleanups (old_cleanups);
2949 /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the
2950 sequence of bytes in PATTERN with length PATTERN_LEN.
2952 The result is 1 if found, 0 if not found, and -1 if there was an error
2953 requiring halting of the search (e.g. memory read error).
2954 If the pattern is found the address is recorded in FOUND_ADDRP. */
2957 target_search_memory (CORE_ADDR start_addr, ULONGEST search_space_len,
2958 const gdb_byte *pattern, ULONGEST pattern_len,
2959 CORE_ADDR *found_addrp)
2961 struct target_ops *t;
2964 /* We don't use INHERIT to set current_target.to_search_memory,
2965 so we have to scan the target stack and handle targetdebug
2969 fprintf_unfiltered (gdb_stdlog, "target_search_memory (%s, ...)\n",
2970 hex_string (start_addr));
2972 for (t = current_target.beneath; t != NULL; t = t->beneath)
2973 if (t->to_search_memory != NULL)
2978 found = t->to_search_memory (t, start_addr, search_space_len,
2979 pattern, pattern_len, found_addrp);
2983 /* If a special version of to_search_memory isn't available, use the
2985 found = simple_search_memory (current_target.beneath,
2986 start_addr, search_space_len,
2987 pattern, pattern_len, found_addrp);
2991 fprintf_unfiltered (gdb_stdlog, " = %d\n", found);
2996 /* Look through the currently pushed targets. If none of them will
2997 be able to restart the currently running process, issue an error
3001 target_require_runnable (void)
3003 struct target_ops *t;
3005 for (t = target_stack; t != NULL; t = t->beneath)
3007 /* If this target knows how to create a new program, then
3008 assume we will still be able to after killing the current
3009 one. Either killing and mourning will not pop T, or else
3010 find_default_run_target will find it again. */
3011 if (t->to_create_inferior != NULL)
3014 /* Do not worry about thread_stratum targets that can not
3015 create inferiors. Assume they will be pushed again if
3016 necessary, and continue to the process_stratum. */
3017 if (t->to_stratum == thread_stratum
3018 || t->to_stratum == arch_stratum)
3021 error (_("The \"%s\" target does not support \"run\". "
3022 "Try \"help target\" or \"continue\"."),
3026 /* This function is only called if the target is running. In that
3027 case there should have been a process_stratum target and it
3028 should either know how to create inferiors, or not... */
3029 internal_error (__FILE__, __LINE__, _("No targets found"));
3032 /* Look through the list of possible targets for a target that can
3033 execute a run or attach command without any other data. This is
3034 used to locate the default process stratum.
3036 If DO_MESG is not NULL, the result is always valid (error() is
3037 called for errors); else, return NULL on error. */
3039 static struct target_ops *
3040 find_default_run_target (char *do_mesg)
3042 struct target_ops **t;
3043 struct target_ops *runable = NULL;
3048 for (t = target_structs; t < target_structs + target_struct_size;
3051 if ((*t)->to_can_run && target_can_run (*t))
3061 error (_("Don't know how to %s. Try \"help target\"."), do_mesg);
3070 find_default_attach (struct target_ops *ops, char *args, int from_tty)
3072 struct target_ops *t;
3074 t = find_default_run_target ("attach");
3075 (t->to_attach) (t, args, from_tty);
3080 find_default_create_inferior (struct target_ops *ops,
3081 char *exec_file, char *allargs, char **env,
3084 struct target_ops *t;
3086 t = find_default_run_target ("run");
3087 (t->to_create_inferior) (t, exec_file, allargs, env, from_tty);
3092 find_default_can_async_p (struct target_ops *ignore)
3094 struct target_ops *t;
3096 /* This may be called before the target is pushed on the stack;
3097 look for the default process stratum. If there's none, gdb isn't
3098 configured with a native debugger, and target remote isn't
3100 t = find_default_run_target (NULL);
3101 if (t && t->to_can_async_p != delegate_can_async_p)
3102 return (t->to_can_async_p) (t);
3107 find_default_is_async_p (struct target_ops *ignore)
3109 struct target_ops *t;
3111 /* This may be called before the target is pushed on the stack;
3112 look for the default process stratum. If there's none, gdb isn't
3113 configured with a native debugger, and target remote isn't
3115 t = find_default_run_target (NULL);
3116 if (t && t->to_is_async_p != delegate_is_async_p)
3117 return (t->to_is_async_p) (t);
3122 find_default_supports_non_stop (struct target_ops *self)
3124 struct target_ops *t;
3126 t = find_default_run_target (NULL);
3127 if (t && t->to_supports_non_stop)
3128 return (t->to_supports_non_stop) (t);
3133 target_supports_non_stop (void)
3135 struct target_ops *t;
3137 for (t = ¤t_target; t != NULL; t = t->beneath)
3138 if (t->to_supports_non_stop)
3139 return t->to_supports_non_stop (t);
3144 /* Implement the "info proc" command. */
3147 target_info_proc (char *args, enum info_proc_what what)
3149 struct target_ops *t;
3151 /* If we're already connected to something that can get us OS
3152 related data, use it. Otherwise, try using the native
3154 if (current_target.to_stratum >= process_stratum)
3155 t = current_target.beneath;
3157 t = find_default_run_target (NULL);
3159 for (; t != NULL; t = t->beneath)
3161 if (t->to_info_proc != NULL)
3163 t->to_info_proc (t, args, what);
3166 fprintf_unfiltered (gdb_stdlog,
3167 "target_info_proc (\"%s\", %d)\n", args, what);
3177 find_default_supports_disable_randomization (struct target_ops *self)
3179 struct target_ops *t;
3181 t = find_default_run_target (NULL);
3182 if (t && t->to_supports_disable_randomization)
3183 return (t->to_supports_disable_randomization) (t);
3188 target_supports_disable_randomization (void)
3190 struct target_ops *t;
3192 for (t = ¤t_target; t != NULL; t = t->beneath)
3193 if (t->to_supports_disable_randomization)
3194 return t->to_supports_disable_randomization (t);
3200 target_get_osdata (const char *type)
3202 struct target_ops *t;
3204 /* If we're already connected to something that can get us OS
3205 related data, use it. Otherwise, try using the native
3207 if (current_target.to_stratum >= process_stratum)
3208 t = current_target.beneath;
3210 t = find_default_run_target ("get OS data");
3215 return target_read_stralloc (t, TARGET_OBJECT_OSDATA, type);
3218 /* Determine the current address space of thread PTID. */
3220 struct address_space *
3221 target_thread_address_space (ptid_t ptid)
3223 struct address_space *aspace;
3224 struct inferior *inf;
3225 struct target_ops *t;
3227 for (t = current_target.beneath; t != NULL; t = t->beneath)
3229 if (t->to_thread_address_space != NULL)
3231 aspace = t->to_thread_address_space (t, ptid);
3232 gdb_assert (aspace);
3235 fprintf_unfiltered (gdb_stdlog,
3236 "target_thread_address_space (%s) = %d\n",
3237 target_pid_to_str (ptid),
3238 address_space_num (aspace));
3243 /* Fall-back to the "main" address space of the inferior. */
3244 inf = find_inferior_pid (ptid_get_pid (ptid));
3246 if (inf == NULL || inf->aspace == NULL)
3247 internal_error (__FILE__, __LINE__,
3248 _("Can't determine the current "
3249 "address space of thread %s\n"),
3250 target_pid_to_str (ptid));
3256 /* Target file operations. */
3258 static struct target_ops *
3259 default_fileio_target (void)
3261 /* If we're already connected to something that can perform
3262 file I/O, use it. Otherwise, try using the native target. */
3263 if (current_target.to_stratum >= process_stratum)
3264 return current_target.beneath;
3266 return find_default_run_target ("file I/O");
3269 /* Open FILENAME on the target, using FLAGS and MODE. Return a
3270 target file descriptor, or -1 if an error occurs (and set
3273 target_fileio_open (const char *filename, int flags, int mode,
3276 struct target_ops *t;
3278 for (t = default_fileio_target (); t != NULL; t = t->beneath)
3280 if (t->to_fileio_open != NULL)
3282 int fd = t->to_fileio_open (t, filename, flags, mode, target_errno);
3285 fprintf_unfiltered (gdb_stdlog,
3286 "target_fileio_open (%s,0x%x,0%o) = %d (%d)\n",
3287 filename, flags, mode,
3288 fd, fd != -1 ? 0 : *target_errno);
3293 *target_errno = FILEIO_ENOSYS;
3297 /* Write up to LEN bytes from WRITE_BUF to FD on the target.
3298 Return the number of bytes written, or -1 if an error occurs
3299 (and set *TARGET_ERRNO). */
3301 target_fileio_pwrite (int fd, const gdb_byte *write_buf, int len,
3302 ULONGEST offset, int *target_errno)
3304 struct target_ops *t;
3306 for (t = default_fileio_target (); t != NULL; t = t->beneath)
3308 if (t->to_fileio_pwrite != NULL)
3310 int ret = t->to_fileio_pwrite (t, fd, write_buf, len, offset,
3314 fprintf_unfiltered (gdb_stdlog,
3315 "target_fileio_pwrite (%d,...,%d,%s) "
3317 fd, len, pulongest (offset),
3318 ret, ret != -1 ? 0 : *target_errno);
3323 *target_errno = FILEIO_ENOSYS;
3327 /* Read up to LEN bytes FD on the target into READ_BUF.
3328 Return the number of bytes read, or -1 if an error occurs
3329 (and set *TARGET_ERRNO). */
3331 target_fileio_pread (int fd, gdb_byte *read_buf, int len,
3332 ULONGEST offset, int *target_errno)
3334 struct target_ops *t;
3336 for (t = default_fileio_target (); t != NULL; t = t->beneath)
3338 if (t->to_fileio_pread != NULL)
3340 int ret = t->to_fileio_pread (t, fd, read_buf, len, offset,
3344 fprintf_unfiltered (gdb_stdlog,
3345 "target_fileio_pread (%d,...,%d,%s) "
3347 fd, len, pulongest (offset),
3348 ret, ret != -1 ? 0 : *target_errno);
3353 *target_errno = FILEIO_ENOSYS;
3357 /* Close FD on the target. Return 0, or -1 if an error occurs
3358 (and set *TARGET_ERRNO). */
3360 target_fileio_close (int fd, int *target_errno)
3362 struct target_ops *t;
3364 for (t = default_fileio_target (); t != NULL; t = t->beneath)
3366 if (t->to_fileio_close != NULL)
3368 int ret = t->to_fileio_close (t, fd, target_errno);
3371 fprintf_unfiltered (gdb_stdlog,
3372 "target_fileio_close (%d) = %d (%d)\n",
3373 fd, ret, ret != -1 ? 0 : *target_errno);
3378 *target_errno = FILEIO_ENOSYS;
3382 /* Unlink FILENAME on the target. Return 0, or -1 if an error
3383 occurs (and set *TARGET_ERRNO). */
3385 target_fileio_unlink (const char *filename, int *target_errno)
3387 struct target_ops *t;
3389 for (t = default_fileio_target (); t != NULL; t = t->beneath)
3391 if (t->to_fileio_unlink != NULL)
3393 int ret = t->to_fileio_unlink (t, filename, target_errno);
3396 fprintf_unfiltered (gdb_stdlog,
3397 "target_fileio_unlink (%s) = %d (%d)\n",
3398 filename, ret, ret != -1 ? 0 : *target_errno);
3403 *target_errno = FILEIO_ENOSYS;
3407 /* Read value of symbolic link FILENAME on the target. Return a
3408 null-terminated string allocated via xmalloc, or NULL if an error
3409 occurs (and set *TARGET_ERRNO). */
3411 target_fileio_readlink (const char *filename, int *target_errno)
3413 struct target_ops *t;
3415 for (t = default_fileio_target (); t != NULL; t = t->beneath)
3417 if (t->to_fileio_readlink != NULL)
3419 char *ret = t->to_fileio_readlink (t, filename, target_errno);
3422 fprintf_unfiltered (gdb_stdlog,
3423 "target_fileio_readlink (%s) = %s (%d)\n",
3424 filename, ret? ret : "(nil)",
3425 ret? 0 : *target_errno);
3430 *target_errno = FILEIO_ENOSYS;
3435 target_fileio_close_cleanup (void *opaque)
3437 int fd = *(int *) opaque;
3440 target_fileio_close (fd, &target_errno);
3443 /* Read target file FILENAME. Store the result in *BUF_P and
3444 return the size of the transferred data. PADDING additional bytes are
3445 available in *BUF_P. This is a helper function for
3446 target_fileio_read_alloc; see the declaration of that function for more
3450 target_fileio_read_alloc_1 (const char *filename,
3451 gdb_byte **buf_p, int padding)
3453 struct cleanup *close_cleanup;
3454 size_t buf_alloc, buf_pos;
3460 fd = target_fileio_open (filename, FILEIO_O_RDONLY, 0700, &target_errno);
3464 close_cleanup = make_cleanup (target_fileio_close_cleanup, &fd);
3466 /* Start by reading up to 4K at a time. The target will throttle
3467 this number down if necessary. */
3469 buf = xmalloc (buf_alloc);
3473 n = target_fileio_pread (fd, &buf[buf_pos],
3474 buf_alloc - buf_pos - padding, buf_pos,
3478 /* An error occurred. */
3479 do_cleanups (close_cleanup);
3485 /* Read all there was. */
3486 do_cleanups (close_cleanup);
3496 /* If the buffer is filling up, expand it. */
3497 if (buf_alloc < buf_pos * 2)
3500 buf = xrealloc (buf, buf_alloc);
3507 /* Read target file FILENAME. Store the result in *BUF_P and return
3508 the size of the transferred data. See the declaration in "target.h"
3509 function for more information about the return value. */
3512 target_fileio_read_alloc (const char *filename, gdb_byte **buf_p)
3514 return target_fileio_read_alloc_1 (filename, buf_p, 0);
3517 /* Read target file FILENAME. The result is NUL-terminated and
3518 returned as a string, allocated using xmalloc. If an error occurs
3519 or the transfer is unsupported, NULL is returned. Empty objects
3520 are returned as allocated but empty strings. A warning is issued
3521 if the result contains any embedded NUL bytes. */
3524 target_fileio_read_stralloc (const char *filename)
3528 LONGEST i, transferred;
3530 transferred = target_fileio_read_alloc_1 (filename, &buffer, 1);
3531 bufstr = (char *) buffer;
3533 if (transferred < 0)
3536 if (transferred == 0)
3537 return xstrdup ("");
3539 bufstr[transferred] = 0;
3541 /* Check for embedded NUL bytes; but allow trailing NULs. */
3542 for (i = strlen (bufstr); i < transferred; i++)
3545 warning (_("target file %s "
3546 "contained unexpected null characters"),
3556 default_region_ok_for_hw_watchpoint (struct target_ops *self,
3557 CORE_ADDR addr, int len)
3559 return (len <= gdbarch_ptr_bit (target_gdbarch ()) / TARGET_CHAR_BIT);
3563 default_watchpoint_addr_within_range (struct target_ops *target,
3565 CORE_ADDR start, int length)
3567 return addr >= start && addr < start + length;
3570 static struct gdbarch *
3571 default_thread_architecture (struct target_ops *ops, ptid_t ptid)
3573 return target_gdbarch ();
3583 return_minus_one (void)
3595 * Find the next target down the stack from the specified target.
3599 find_target_beneath (struct target_ops *t)
3607 find_target_at (enum strata stratum)
3609 struct target_ops *t;
3611 for (t = current_target.beneath; t != NULL; t = t->beneath)
3612 if (t->to_stratum == stratum)
3619 /* The inferior process has died. Long live the inferior! */
3622 generic_mourn_inferior (void)
3626 ptid = inferior_ptid;
3627 inferior_ptid = null_ptid;
3629 /* Mark breakpoints uninserted in case something tries to delete a
3630 breakpoint while we delete the inferior's threads (which would
3631 fail, since the inferior is long gone). */
3632 mark_breakpoints_out ();
3634 if (!ptid_equal (ptid, null_ptid))
3636 int pid = ptid_get_pid (ptid);
3637 exit_inferior (pid);
3640 /* Note this wipes step-resume breakpoints, so needs to be done
3641 after exit_inferior, which ends up referencing the step-resume
3642 breakpoints through clear_thread_inferior_resources. */
3643 breakpoint_init_inferior (inf_exited);
3645 registers_changed ();
3647 reopen_exec_file ();
3648 reinit_frame_cache ();
3650 if (deprecated_detach_hook)
3651 deprecated_detach_hook ();
3654 /* Convert a normal process ID to a string. Returns the string in a
3658 normal_pid_to_str (ptid_t ptid)
3660 static char buf[32];
3662 xsnprintf (buf, sizeof buf, "process %d", ptid_get_pid (ptid));
3667 dummy_pid_to_str (struct target_ops *ops, ptid_t ptid)
3669 return normal_pid_to_str (ptid);
3672 /* Error-catcher for target_find_memory_regions. */
3674 dummy_find_memory_regions (struct target_ops *self,
3675 find_memory_region_ftype ignore1, void *ignore2)
3677 error (_("Command not implemented for this target."));
3681 /* Error-catcher for target_make_corefile_notes. */
3683 dummy_make_corefile_notes (struct target_ops *self,
3684 bfd *ignore1, int *ignore2)
3686 error (_("Command not implemented for this target."));
3690 /* Error-catcher for target_get_bookmark. */
3692 dummy_get_bookmark (struct target_ops *self, char *ignore1, int ignore2)
3698 /* Error-catcher for target_goto_bookmark. */
3700 dummy_goto_bookmark (struct target_ops *self, gdb_byte *ignore, int from_tty)
3705 /* Set up the handful of non-empty slots needed by the dummy target
3709 init_dummy_target (void)
3711 dummy_target.to_shortname = "None";
3712 dummy_target.to_longname = "None";
3713 dummy_target.to_doc = "";
3714 dummy_target.to_create_inferior = find_default_create_inferior;
3715 dummy_target.to_supports_non_stop = find_default_supports_non_stop;
3716 dummy_target.to_supports_disable_randomization
3717 = find_default_supports_disable_randomization;
3718 dummy_target.to_pid_to_str = dummy_pid_to_str;
3719 dummy_target.to_stratum = dummy_stratum;
3720 dummy_target.to_find_memory_regions = dummy_find_memory_regions;
3721 dummy_target.to_make_corefile_notes = dummy_make_corefile_notes;
3722 dummy_target.to_get_bookmark = dummy_get_bookmark;
3723 dummy_target.to_goto_bookmark = dummy_goto_bookmark;
3724 dummy_target.to_has_all_memory = (int (*) (struct target_ops *)) return_zero;
3725 dummy_target.to_has_memory = (int (*) (struct target_ops *)) return_zero;
3726 dummy_target.to_has_stack = (int (*) (struct target_ops *)) return_zero;
3727 dummy_target.to_has_registers = (int (*) (struct target_ops *)) return_zero;
3728 dummy_target.to_has_execution
3729 = (int (*) (struct target_ops *, ptid_t)) return_zero;
3730 dummy_target.to_magic = OPS_MAGIC;
3732 install_dummy_methods (&dummy_target);
3736 debug_to_open (char *args, int from_tty)
3738 debug_target.to_open (args, from_tty);
3740 fprintf_unfiltered (gdb_stdlog, "target_open (%s, %d)\n", args, from_tty);
3744 target_close (struct target_ops *targ)
3746 gdb_assert (!target_is_pushed (targ));
3748 if (targ->to_xclose != NULL)
3749 targ->to_xclose (targ);
3750 else if (targ->to_close != NULL)
3751 targ->to_close (targ);
3754 fprintf_unfiltered (gdb_stdlog, "target_close ()\n");
3758 target_attach (char *args, int from_tty)
3760 current_target.to_attach (¤t_target, args, from_tty);
3762 fprintf_unfiltered (gdb_stdlog, "target_attach (%s, %d)\n",
3767 target_thread_alive (ptid_t ptid)
3769 struct target_ops *t;
3771 for (t = current_target.beneath; t != NULL; t = t->beneath)
3773 if (t->to_thread_alive != NULL)
3777 retval = t->to_thread_alive (t, ptid);
3779 fprintf_unfiltered (gdb_stdlog, "target_thread_alive (%d) = %d\n",
3780 ptid_get_pid (ptid), retval);
3790 target_find_new_threads (void)
3792 struct target_ops *t;
3794 for (t = current_target.beneath; t != NULL; t = t->beneath)
3796 if (t->to_find_new_threads != NULL)
3798 t->to_find_new_threads (t);
3800 fprintf_unfiltered (gdb_stdlog, "target_find_new_threads ()\n");
3808 target_stop (ptid_t ptid)
3812 warning (_("May not interrupt or stop the target, ignoring attempt"));
3816 (*current_target.to_stop) (¤t_target, ptid);
3820 debug_to_post_attach (struct target_ops *self, int pid)
3822 debug_target.to_post_attach (&debug_target, pid);
3824 fprintf_unfiltered (gdb_stdlog, "target_post_attach (%d)\n", pid);
3827 /* Concatenate ELEM to LIST, a comma separate list, and return the
3828 result. The LIST incoming argument is released. */
3831 str_comma_list_concat_elem (char *list, const char *elem)
3834 return xstrdup (elem);
3836 return reconcat (list, list, ", ", elem, (char *) NULL);
3839 /* Helper for target_options_to_string. If OPT is present in
3840 TARGET_OPTIONS, append the OPT_STR (string version of OPT) in RET.
3841 Returns the new resulting string. OPT is removed from
3845 do_option (int *target_options, char *ret,
3846 int opt, char *opt_str)
3848 if ((*target_options & opt) != 0)
3850 ret = str_comma_list_concat_elem (ret, opt_str);
3851 *target_options &= ~opt;
3858 target_options_to_string (int target_options)
3862 #define DO_TARG_OPTION(OPT) \
3863 ret = do_option (&target_options, ret, OPT, #OPT)
3865 DO_TARG_OPTION (TARGET_WNOHANG);
3867 if (target_options != 0)
3868 ret = str_comma_list_concat_elem (ret, "unknown???");
3876 debug_print_register (const char * func,
3877 struct regcache *regcache, int regno)
3879 struct gdbarch *gdbarch = get_regcache_arch (regcache);
3881 fprintf_unfiltered (gdb_stdlog, "%s ", func);
3882 if (regno >= 0 && regno < gdbarch_num_regs (gdbarch)
3883 && gdbarch_register_name (gdbarch, regno) != NULL
3884 && gdbarch_register_name (gdbarch, regno)[0] != '\0')
3885 fprintf_unfiltered (gdb_stdlog, "(%s)",
3886 gdbarch_register_name (gdbarch, regno));
3888 fprintf_unfiltered (gdb_stdlog, "(%d)", regno);
3889 if (regno >= 0 && regno < gdbarch_num_regs (gdbarch))
3891 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
3892 int i, size = register_size (gdbarch, regno);
3893 gdb_byte buf[MAX_REGISTER_SIZE];
3895 regcache_raw_collect (regcache, regno, buf);
3896 fprintf_unfiltered (gdb_stdlog, " = ");
3897 for (i = 0; i < size; i++)
3899 fprintf_unfiltered (gdb_stdlog, "%02x", buf[i]);
3901 if (size <= sizeof (LONGEST))
3903 ULONGEST val = extract_unsigned_integer (buf, size, byte_order);
3905 fprintf_unfiltered (gdb_stdlog, " %s %s",
3906 core_addr_to_string_nz (val), plongest (val));
3909 fprintf_unfiltered (gdb_stdlog, "\n");
3913 target_fetch_registers (struct regcache *regcache, int regno)
3915 struct target_ops *t;
3917 for (t = current_target.beneath; t != NULL; t = t->beneath)
3919 if (t->to_fetch_registers != NULL)
3921 t->to_fetch_registers (t, regcache, regno);
3923 debug_print_register ("target_fetch_registers", regcache, regno);
3930 target_store_registers (struct regcache *regcache, int regno)
3932 struct target_ops *t;
3934 if (!may_write_registers)
3935 error (_("Writing to registers is not allowed (regno %d)"), regno);
3937 current_target.to_store_registers (¤t_target, regcache, regno);
3940 debug_print_register ("target_store_registers", regcache, regno);
3945 target_core_of_thread (ptid_t ptid)
3947 struct target_ops *t;
3949 for (t = current_target.beneath; t != NULL; t = t->beneath)
3951 if (t->to_core_of_thread != NULL)
3953 int retval = t->to_core_of_thread (t, ptid);
3956 fprintf_unfiltered (gdb_stdlog,
3957 "target_core_of_thread (%d) = %d\n",
3958 ptid_get_pid (ptid), retval);
3967 target_verify_memory (const gdb_byte *data, CORE_ADDR memaddr, ULONGEST size)
3969 struct target_ops *t;
3971 for (t = current_target.beneath; t != NULL; t = t->beneath)
3973 if (t->to_verify_memory != NULL)
3975 int retval = t->to_verify_memory (t, data, memaddr, size);
3978 fprintf_unfiltered (gdb_stdlog,
3979 "target_verify_memory (%s, %s) = %d\n",
3980 paddress (target_gdbarch (), memaddr),
3990 /* The documentation for this function is in its prototype declaration in
3994 target_insert_mask_watchpoint (CORE_ADDR addr, CORE_ADDR mask, int rw)
3996 struct target_ops *t;
3998 for (t = current_target.beneath; t != NULL; t = t->beneath)
3999 if (t->to_insert_mask_watchpoint != NULL)
4003 ret = t->to_insert_mask_watchpoint (t, addr, mask, rw);
4006 fprintf_unfiltered (gdb_stdlog, "\
4007 target_insert_mask_watchpoint (%s, %s, %d) = %d\n",
4008 core_addr_to_string (addr),
4009 core_addr_to_string (mask), rw, ret);
4017 /* The documentation for this function is in its prototype declaration in
4021 target_remove_mask_watchpoint (CORE_ADDR addr, CORE_ADDR mask, int rw)
4023 struct target_ops *t;
4025 for (t = current_target.beneath; t != NULL; t = t->beneath)
4026 if (t->to_remove_mask_watchpoint != NULL)
4030 ret = t->to_remove_mask_watchpoint (t, addr, mask, rw);
4033 fprintf_unfiltered (gdb_stdlog, "\
4034 target_remove_mask_watchpoint (%s, %s, %d) = %d\n",
4035 core_addr_to_string (addr),
4036 core_addr_to_string (mask), rw, ret);
4044 /* The documentation for this function is in its prototype declaration
4048 target_masked_watch_num_registers (CORE_ADDR addr, CORE_ADDR mask)
4050 struct target_ops *t;
4052 for (t = current_target.beneath; t != NULL; t = t->beneath)
4053 if (t->to_masked_watch_num_registers != NULL)
4054 return t->to_masked_watch_num_registers (t, addr, mask);
4059 /* The documentation for this function is in its prototype declaration
4063 target_ranged_break_num_registers (void)
4065 struct target_ops *t;
4067 for (t = current_target.beneath; t != NULL; t = t->beneath)
4068 if (t->to_ranged_break_num_registers != NULL)
4069 return t->to_ranged_break_num_registers (t);
4076 struct btrace_target_info *
4077 target_enable_btrace (ptid_t ptid)
4079 struct target_ops *t;
4081 for (t = current_target.beneath; t != NULL; t = t->beneath)
4082 if (t->to_enable_btrace != NULL)
4083 return t->to_enable_btrace (t, ptid);
4092 target_disable_btrace (struct btrace_target_info *btinfo)
4094 struct target_ops *t;
4096 for (t = current_target.beneath; t != NULL; t = t->beneath)
4097 if (t->to_disable_btrace != NULL)
4099 t->to_disable_btrace (t, btinfo);
4109 target_teardown_btrace (struct btrace_target_info *btinfo)
4111 struct target_ops *t;
4113 for (t = current_target.beneath; t != NULL; t = t->beneath)
4114 if (t->to_teardown_btrace != NULL)
4116 t->to_teardown_btrace (t, btinfo);
4126 target_read_btrace (VEC (btrace_block_s) **btrace,
4127 struct btrace_target_info *btinfo,
4128 enum btrace_read_type type)
4130 struct target_ops *t;
4132 for (t = current_target.beneath; t != NULL; t = t->beneath)
4133 if (t->to_read_btrace != NULL)
4134 return t->to_read_btrace (t, btrace, btinfo, type);
4137 return BTRACE_ERR_NOT_SUPPORTED;
4143 target_stop_recording (void)
4145 struct target_ops *t;
4147 for (t = current_target.beneath; t != NULL; t = t->beneath)
4148 if (t->to_stop_recording != NULL)
4150 t->to_stop_recording (t);
4154 /* This is optional. */
4160 target_info_record (void)
4162 struct target_ops *t;
4164 for (t = current_target.beneath; t != NULL; t = t->beneath)
4165 if (t->to_info_record != NULL)
4167 t->to_info_record (t);
4177 target_save_record (const char *filename)
4179 struct target_ops *t;
4181 for (t = current_target.beneath; t != NULL; t = t->beneath)
4182 if (t->to_save_record != NULL)
4184 t->to_save_record (t, filename);
4194 target_supports_delete_record (void)
4196 struct target_ops *t;
4198 for (t = current_target.beneath; t != NULL; t = t->beneath)
4199 if (t->to_delete_record != NULL)
4208 target_delete_record (void)
4210 struct target_ops *t;
4212 for (t = current_target.beneath; t != NULL; t = t->beneath)
4213 if (t->to_delete_record != NULL)
4215 t->to_delete_record (t);
4225 target_record_is_replaying (void)
4227 struct target_ops *t;
4229 for (t = current_target.beneath; t != NULL; t = t->beneath)
4230 if (t->to_record_is_replaying != NULL)
4231 return t->to_record_is_replaying (t);
4239 target_goto_record_begin (void)
4241 struct target_ops *t;
4243 for (t = current_target.beneath; t != NULL; t = t->beneath)
4244 if (t->to_goto_record_begin != NULL)
4246 t->to_goto_record_begin (t);
4256 target_goto_record_end (void)
4258 struct target_ops *t;
4260 for (t = current_target.beneath; t != NULL; t = t->beneath)
4261 if (t->to_goto_record_end != NULL)
4263 t->to_goto_record_end (t);
4273 target_goto_record (ULONGEST insn)
4275 struct target_ops *t;
4277 for (t = current_target.beneath; t != NULL; t = t->beneath)
4278 if (t->to_goto_record != NULL)
4280 t->to_goto_record (t, insn);
4290 target_insn_history (int size, int flags)
4292 struct target_ops *t;
4294 for (t = current_target.beneath; t != NULL; t = t->beneath)
4295 if (t->to_insn_history != NULL)
4297 t->to_insn_history (t, size, flags);
4307 target_insn_history_from (ULONGEST from, int size, int flags)
4309 struct target_ops *t;
4311 for (t = current_target.beneath; t != NULL; t = t->beneath)
4312 if (t->to_insn_history_from != NULL)
4314 t->to_insn_history_from (t, from, size, flags);
4324 target_insn_history_range (ULONGEST begin, ULONGEST end, int flags)
4326 struct target_ops *t;
4328 for (t = current_target.beneath; t != NULL; t = t->beneath)
4329 if (t->to_insn_history_range != NULL)
4331 t->to_insn_history_range (t, begin, end, flags);
4341 target_call_history (int size, int flags)
4343 struct target_ops *t;
4345 for (t = current_target.beneath; t != NULL; t = t->beneath)
4346 if (t->to_call_history != NULL)
4348 t->to_call_history (t, size, flags);
4358 target_call_history_from (ULONGEST begin, int size, int flags)
4360 struct target_ops *t;
4362 for (t = current_target.beneath; t != NULL; t = t->beneath)
4363 if (t->to_call_history_from != NULL)
4365 t->to_call_history_from (t, begin, size, flags);
4375 target_call_history_range (ULONGEST begin, ULONGEST end, int flags)
4377 struct target_ops *t;
4379 for (t = current_target.beneath; t != NULL; t = t->beneath)
4380 if (t->to_call_history_range != NULL)
4382 t->to_call_history_range (t, begin, end, flags);
4390 debug_to_prepare_to_store (struct target_ops *self, struct regcache *regcache)
4392 debug_target.to_prepare_to_store (&debug_target, regcache);
4394 fprintf_unfiltered (gdb_stdlog, "target_prepare_to_store ()\n");
4399 const struct frame_unwind *
4400 target_get_unwinder (void)
4402 struct target_ops *t;
4404 for (t = current_target.beneath; t != NULL; t = t->beneath)
4405 if (t->to_get_unwinder != NULL)
4406 return t->to_get_unwinder;
4413 const struct frame_unwind *
4414 target_get_tailcall_unwinder (void)
4416 struct target_ops *t;
4418 for (t = current_target.beneath; t != NULL; t = t->beneath)
4419 if (t->to_get_tailcall_unwinder != NULL)
4420 return t->to_get_tailcall_unwinder;
4428 forward_target_decr_pc_after_break (struct target_ops *ops,
4429 struct gdbarch *gdbarch)
4431 for (; ops != NULL; ops = ops->beneath)
4432 if (ops->to_decr_pc_after_break != NULL)
4433 return ops->to_decr_pc_after_break (ops, gdbarch);
4435 return gdbarch_decr_pc_after_break (gdbarch);
4441 target_decr_pc_after_break (struct gdbarch *gdbarch)
4443 return forward_target_decr_pc_after_break (current_target.beneath, gdbarch);
4447 deprecated_debug_xfer_memory (CORE_ADDR memaddr, bfd_byte *myaddr, int len,
4448 int write, struct mem_attrib *attrib,
4449 struct target_ops *target)
4453 retval = debug_target.deprecated_xfer_memory (memaddr, myaddr, len, write,
4456 fprintf_unfiltered (gdb_stdlog,
4457 "target_xfer_memory (%s, xxx, %d, %s, xxx) = %d",
4458 paddress (target_gdbarch (), memaddr), len,
4459 write ? "write" : "read", retval);
4465 fputs_unfiltered (", bytes =", gdb_stdlog);
4466 for (i = 0; i < retval; i++)
4468 if ((((intptr_t) &(myaddr[i])) & 0xf) == 0)
4470 if (targetdebug < 2 && i > 0)
4472 fprintf_unfiltered (gdb_stdlog, " ...");
4475 fprintf_unfiltered (gdb_stdlog, "\n");
4478 fprintf_unfiltered (gdb_stdlog, " %02x", myaddr[i] & 0xff);
4482 fputc_unfiltered ('\n', gdb_stdlog);
4488 debug_to_files_info (struct target_ops *target)
4490 debug_target.to_files_info (target);
4492 fprintf_unfiltered (gdb_stdlog, "target_files_info (xxx)\n");
4496 debug_to_insert_breakpoint (struct target_ops *ops, struct gdbarch *gdbarch,
4497 struct bp_target_info *bp_tgt)
4501 retval = debug_target.to_insert_breakpoint (&debug_target, gdbarch, bp_tgt);
4503 fprintf_unfiltered (gdb_stdlog,
4504 "target_insert_breakpoint (%s, xxx) = %ld\n",
4505 core_addr_to_string (bp_tgt->placed_address),
4506 (unsigned long) retval);
4511 debug_to_remove_breakpoint (struct target_ops *ops, struct gdbarch *gdbarch,
4512 struct bp_target_info *bp_tgt)
4516 retval = debug_target.to_remove_breakpoint (&debug_target, gdbarch, bp_tgt);
4518 fprintf_unfiltered (gdb_stdlog,
4519 "target_remove_breakpoint (%s, xxx) = %ld\n",
4520 core_addr_to_string (bp_tgt->placed_address),
4521 (unsigned long) retval);
4526 debug_to_can_use_hw_breakpoint (struct target_ops *self,
4527 int type, int cnt, int from_tty)
4531 retval = debug_target.to_can_use_hw_breakpoint (&debug_target,
4532 type, cnt, from_tty);
4534 fprintf_unfiltered (gdb_stdlog,
4535 "target_can_use_hw_breakpoint (%ld, %ld, %ld) = %ld\n",
4536 (unsigned long) type,
4537 (unsigned long) cnt,
4538 (unsigned long) from_tty,
4539 (unsigned long) retval);
4544 debug_to_region_ok_for_hw_watchpoint (struct target_ops *self,
4545 CORE_ADDR addr, int len)
4549 retval = debug_target.to_region_ok_for_hw_watchpoint (&debug_target,
4552 fprintf_unfiltered (gdb_stdlog,
4553 "target_region_ok_for_hw_watchpoint (%s, %ld) = %s\n",
4554 core_addr_to_string (addr), (unsigned long) len,
4555 core_addr_to_string (retval));
4560 debug_to_can_accel_watchpoint_condition (struct target_ops *self,
4561 CORE_ADDR addr, int len, int rw,
4562 struct expression *cond)
4566 retval = debug_target.to_can_accel_watchpoint_condition (&debug_target,
4570 fprintf_unfiltered (gdb_stdlog,
4571 "target_can_accel_watchpoint_condition "
4572 "(%s, %d, %d, %s) = %ld\n",
4573 core_addr_to_string (addr), len, rw,
4574 host_address_to_string (cond), (unsigned long) retval);
4579 debug_to_stopped_by_watchpoint (struct target_ops *ops)
4583 retval = debug_target.to_stopped_by_watchpoint (&debug_target);
4585 fprintf_unfiltered (gdb_stdlog,
4586 "target_stopped_by_watchpoint () = %ld\n",
4587 (unsigned long) retval);
4592 debug_to_stopped_data_address (struct target_ops *target, CORE_ADDR *addr)
4596 retval = debug_target.to_stopped_data_address (target, addr);
4598 fprintf_unfiltered (gdb_stdlog,
4599 "target_stopped_data_address ([%s]) = %ld\n",
4600 core_addr_to_string (*addr),
4601 (unsigned long)retval);
4606 debug_to_watchpoint_addr_within_range (struct target_ops *target,
4608 CORE_ADDR start, int length)
4612 retval = debug_target.to_watchpoint_addr_within_range (target, addr,
4615 fprintf_filtered (gdb_stdlog,
4616 "target_watchpoint_addr_within_range (%s, %s, %d) = %d\n",
4617 core_addr_to_string (addr), core_addr_to_string (start),
4623 debug_to_insert_hw_breakpoint (struct target_ops *self,
4624 struct gdbarch *gdbarch,
4625 struct bp_target_info *bp_tgt)
4629 retval = debug_target.to_insert_hw_breakpoint (&debug_target,
4632 fprintf_unfiltered (gdb_stdlog,
4633 "target_insert_hw_breakpoint (%s, xxx) = %ld\n",
4634 core_addr_to_string (bp_tgt->placed_address),
4635 (unsigned long) retval);
4640 debug_to_remove_hw_breakpoint (struct target_ops *self,
4641 struct gdbarch *gdbarch,
4642 struct bp_target_info *bp_tgt)
4646 retval = debug_target.to_remove_hw_breakpoint (&debug_target,
4649 fprintf_unfiltered (gdb_stdlog,
4650 "target_remove_hw_breakpoint (%s, xxx) = %ld\n",
4651 core_addr_to_string (bp_tgt->placed_address),
4652 (unsigned long) retval);
4657 debug_to_insert_watchpoint (struct target_ops *self,
4658 CORE_ADDR addr, int len, int type,
4659 struct expression *cond)
4663 retval = debug_target.to_insert_watchpoint (&debug_target,
4664 addr, len, type, cond);
4666 fprintf_unfiltered (gdb_stdlog,
4667 "target_insert_watchpoint (%s, %d, %d, %s) = %ld\n",
4668 core_addr_to_string (addr), len, type,
4669 host_address_to_string (cond), (unsigned long) retval);
4674 debug_to_remove_watchpoint (struct target_ops *self,
4675 CORE_ADDR addr, int len, int type,
4676 struct expression *cond)
4680 retval = debug_target.to_remove_watchpoint (&debug_target,
4681 addr, len, type, cond);
4683 fprintf_unfiltered (gdb_stdlog,
4684 "target_remove_watchpoint (%s, %d, %d, %s) = %ld\n",
4685 core_addr_to_string (addr), len, type,
4686 host_address_to_string (cond), (unsigned long) retval);
4691 debug_to_terminal_init (struct target_ops *self)
4693 debug_target.to_terminal_init (&debug_target);
4695 fprintf_unfiltered (gdb_stdlog, "target_terminal_init ()\n");
4699 debug_to_terminal_inferior (struct target_ops *self)
4701 debug_target.to_terminal_inferior (&debug_target);
4703 fprintf_unfiltered (gdb_stdlog, "target_terminal_inferior ()\n");
4707 debug_to_terminal_ours_for_output (struct target_ops *self)
4709 debug_target.to_terminal_ours_for_output (&debug_target);
4711 fprintf_unfiltered (gdb_stdlog, "target_terminal_ours_for_output ()\n");
4715 debug_to_terminal_ours (struct target_ops *self)
4717 debug_target.to_terminal_ours (&debug_target);
4719 fprintf_unfiltered (gdb_stdlog, "target_terminal_ours ()\n");
4723 debug_to_terminal_save_ours (struct target_ops *self)
4725 debug_target.to_terminal_save_ours (&debug_target);
4727 fprintf_unfiltered (gdb_stdlog, "target_terminal_save_ours ()\n");
4731 debug_to_terminal_info (struct target_ops *self,
4732 const char *arg, int from_tty)
4734 debug_target.to_terminal_info (&debug_target, arg, from_tty);
4736 fprintf_unfiltered (gdb_stdlog, "target_terminal_info (%s, %d)\n", arg,
4741 debug_to_load (struct target_ops *self, char *args, int from_tty)
4743 debug_target.to_load (&debug_target, args, from_tty);
4745 fprintf_unfiltered (gdb_stdlog, "target_load (%s, %d)\n", args, from_tty);
4749 debug_to_post_startup_inferior (struct target_ops *self, ptid_t ptid)
4751 debug_target.to_post_startup_inferior (&debug_target, ptid);
4753 fprintf_unfiltered (gdb_stdlog, "target_post_startup_inferior (%d)\n",
4754 ptid_get_pid (ptid));
4758 debug_to_insert_fork_catchpoint (struct target_ops *self, int pid)
4762 retval = debug_target.to_insert_fork_catchpoint (&debug_target, pid);
4764 fprintf_unfiltered (gdb_stdlog, "target_insert_fork_catchpoint (%d) = %d\n",
4771 debug_to_remove_fork_catchpoint (struct target_ops *self, int pid)
4775 retval = debug_target.to_remove_fork_catchpoint (&debug_target, pid);
4777 fprintf_unfiltered (gdb_stdlog, "target_remove_fork_catchpoint (%d) = %d\n",
4784 debug_to_insert_vfork_catchpoint (struct target_ops *self, int pid)
4788 retval = debug_target.to_insert_vfork_catchpoint (&debug_target, pid);
4790 fprintf_unfiltered (gdb_stdlog, "target_insert_vfork_catchpoint (%d) = %d\n",
4797 debug_to_remove_vfork_catchpoint (struct target_ops *self, int pid)
4801 retval = debug_target.to_remove_vfork_catchpoint (&debug_target, pid);
4803 fprintf_unfiltered (gdb_stdlog, "target_remove_vfork_catchpoint (%d) = %d\n",
4810 debug_to_insert_exec_catchpoint (struct target_ops *self, int pid)
4814 retval = debug_target.to_insert_exec_catchpoint (&debug_target, pid);
4816 fprintf_unfiltered (gdb_stdlog, "target_insert_exec_catchpoint (%d) = %d\n",
4823 debug_to_remove_exec_catchpoint (struct target_ops *self, int pid)
4827 retval = debug_target.to_remove_exec_catchpoint (&debug_target, pid);
4829 fprintf_unfiltered (gdb_stdlog, "target_remove_exec_catchpoint (%d) = %d\n",
4836 debug_to_has_exited (struct target_ops *self,
4837 int pid, int wait_status, int *exit_status)
4841 has_exited = debug_target.to_has_exited (&debug_target,
4842 pid, wait_status, exit_status);
4844 fprintf_unfiltered (gdb_stdlog, "target_has_exited (%d, %d, %d) = %d\n",
4845 pid, wait_status, *exit_status, has_exited);
4851 debug_to_can_run (struct target_ops *self)
4855 retval = debug_target.to_can_run (&debug_target);
4857 fprintf_unfiltered (gdb_stdlog, "target_can_run () = %d\n", retval);
4862 static struct gdbarch *
4863 debug_to_thread_architecture (struct target_ops *ops, ptid_t ptid)
4865 struct gdbarch *retval;
4867 retval = debug_target.to_thread_architecture (ops, ptid);
4869 fprintf_unfiltered (gdb_stdlog,
4870 "target_thread_architecture (%s) = %s [%s]\n",
4871 target_pid_to_str (ptid),
4872 host_address_to_string (retval),
4873 gdbarch_bfd_arch_info (retval)->printable_name);
4878 debug_to_stop (struct target_ops *self, ptid_t ptid)
4880 debug_target.to_stop (&debug_target, ptid);
4882 fprintf_unfiltered (gdb_stdlog, "target_stop (%s)\n",
4883 target_pid_to_str (ptid));
4887 debug_to_rcmd (struct target_ops *self, char *command,
4888 struct ui_file *outbuf)
4890 debug_target.to_rcmd (&debug_target, command, outbuf);
4891 fprintf_unfiltered (gdb_stdlog, "target_rcmd (%s, ...)\n", command);
4895 debug_to_pid_to_exec_file (struct target_ops *self, int pid)
4899 exec_file = debug_target.to_pid_to_exec_file (&debug_target, pid);
4901 fprintf_unfiltered (gdb_stdlog, "target_pid_to_exec_file (%d) = %s\n",
4908 setup_target_debug (void)
4910 memcpy (&debug_target, ¤t_target, sizeof debug_target);
4912 current_target.to_open = debug_to_open;
4913 current_target.to_post_attach = debug_to_post_attach;
4914 current_target.to_prepare_to_store = debug_to_prepare_to_store;
4915 current_target.deprecated_xfer_memory = deprecated_debug_xfer_memory;
4916 current_target.to_files_info = debug_to_files_info;
4917 current_target.to_insert_breakpoint = debug_to_insert_breakpoint;
4918 current_target.to_remove_breakpoint = debug_to_remove_breakpoint;
4919 current_target.to_can_use_hw_breakpoint = debug_to_can_use_hw_breakpoint;
4920 current_target.to_insert_hw_breakpoint = debug_to_insert_hw_breakpoint;
4921 current_target.to_remove_hw_breakpoint = debug_to_remove_hw_breakpoint;
4922 current_target.to_insert_watchpoint = debug_to_insert_watchpoint;
4923 current_target.to_remove_watchpoint = debug_to_remove_watchpoint;
4924 current_target.to_stopped_by_watchpoint = debug_to_stopped_by_watchpoint;
4925 current_target.to_stopped_data_address = debug_to_stopped_data_address;
4926 current_target.to_watchpoint_addr_within_range
4927 = debug_to_watchpoint_addr_within_range;
4928 current_target.to_region_ok_for_hw_watchpoint
4929 = debug_to_region_ok_for_hw_watchpoint;
4930 current_target.to_can_accel_watchpoint_condition
4931 = debug_to_can_accel_watchpoint_condition;
4932 current_target.to_terminal_init = debug_to_terminal_init;
4933 current_target.to_terminal_inferior = debug_to_terminal_inferior;
4934 current_target.to_terminal_ours_for_output
4935 = debug_to_terminal_ours_for_output;
4936 current_target.to_terminal_ours = debug_to_terminal_ours;
4937 current_target.to_terminal_save_ours = debug_to_terminal_save_ours;
4938 current_target.to_terminal_info = debug_to_terminal_info;
4939 current_target.to_load = debug_to_load;
4940 current_target.to_post_startup_inferior = debug_to_post_startup_inferior;
4941 current_target.to_insert_fork_catchpoint = debug_to_insert_fork_catchpoint;
4942 current_target.to_remove_fork_catchpoint = debug_to_remove_fork_catchpoint;
4943 current_target.to_insert_vfork_catchpoint = debug_to_insert_vfork_catchpoint;
4944 current_target.to_remove_vfork_catchpoint = debug_to_remove_vfork_catchpoint;
4945 current_target.to_insert_exec_catchpoint = debug_to_insert_exec_catchpoint;
4946 current_target.to_remove_exec_catchpoint = debug_to_remove_exec_catchpoint;
4947 current_target.to_has_exited = debug_to_has_exited;
4948 current_target.to_can_run = debug_to_can_run;
4949 current_target.to_stop = debug_to_stop;
4950 current_target.to_rcmd = debug_to_rcmd;
4951 current_target.to_pid_to_exec_file = debug_to_pid_to_exec_file;
4952 current_target.to_thread_architecture = debug_to_thread_architecture;
4956 static char targ_desc[] =
4957 "Names of targets and files being debugged.\nShows the entire \
4958 stack of targets currently in use (including the exec-file,\n\
4959 core-file, and process, if any), as well as the symbol file name.";
4962 default_rcmd (struct target_ops *self, char *command, struct ui_file *output)
4964 error (_("\"monitor\" command not supported by this target."));
4968 do_monitor_command (char *cmd,
4971 target_rcmd (cmd, gdb_stdtarg);
4974 /* Print the name of each layers of our target stack. */
4977 maintenance_print_target_stack (char *cmd, int from_tty)
4979 struct target_ops *t;
4981 printf_filtered (_("The current target stack is:\n"));
4983 for (t = target_stack; t != NULL; t = t->beneath)
4985 printf_filtered (" - %s (%s)\n", t->to_shortname, t->to_longname);
4989 /* Controls if async mode is permitted. */
4990 int target_async_permitted = 0;
4992 /* The set command writes to this variable. If the inferior is
4993 executing, target_async_permitted is *not* updated. */
4994 static int target_async_permitted_1 = 0;
4997 set_target_async_command (char *args, int from_tty,
4998 struct cmd_list_element *c)
5000 if (have_live_inferiors ())
5002 target_async_permitted_1 = target_async_permitted;
5003 error (_("Cannot change this setting while the inferior is running."));
5006 target_async_permitted = target_async_permitted_1;
5010 show_target_async_command (struct ui_file *file, int from_tty,
5011 struct cmd_list_element *c,
5014 fprintf_filtered (file,
5015 _("Controlling the inferior in "
5016 "asynchronous mode is %s.\n"), value);
5019 /* Temporary copies of permission settings. */
5021 static int may_write_registers_1 = 1;
5022 static int may_write_memory_1 = 1;
5023 static int may_insert_breakpoints_1 = 1;
5024 static int may_insert_tracepoints_1 = 1;
5025 static int may_insert_fast_tracepoints_1 = 1;
5026 static int may_stop_1 = 1;
5028 /* Make the user-set values match the real values again. */
5031 update_target_permissions (void)
5033 may_write_registers_1 = may_write_registers;
5034 may_write_memory_1 = may_write_memory;
5035 may_insert_breakpoints_1 = may_insert_breakpoints;
5036 may_insert_tracepoints_1 = may_insert_tracepoints;
5037 may_insert_fast_tracepoints_1 = may_insert_fast_tracepoints;
5038 may_stop_1 = may_stop;
5041 /* The one function handles (most of) the permission flags in the same
5045 set_target_permissions (char *args, int from_tty,
5046 struct cmd_list_element *c)
5048 if (target_has_execution)
5050 update_target_permissions ();
5051 error (_("Cannot change this setting while the inferior is running."));
5054 /* Make the real values match the user-changed values. */
5055 may_write_registers = may_write_registers_1;
5056 may_insert_breakpoints = may_insert_breakpoints_1;
5057 may_insert_tracepoints = may_insert_tracepoints_1;
5058 may_insert_fast_tracepoints = may_insert_fast_tracepoints_1;
5059 may_stop = may_stop_1;
5060 update_observer_mode ();
5063 /* Set memory write permission independently of observer mode. */
5066 set_write_memory_permission (char *args, int from_tty,
5067 struct cmd_list_element *c)
5069 /* Make the real values match the user-changed values. */
5070 may_write_memory = may_write_memory_1;
5071 update_observer_mode ();
5076 initialize_targets (void)
5078 init_dummy_target ();
5079 push_target (&dummy_target);
5081 add_info ("target", target_info, targ_desc);
5082 add_info ("files", target_info, targ_desc);
5084 add_setshow_zuinteger_cmd ("target", class_maintenance, &targetdebug, _("\
5085 Set target debugging."), _("\
5086 Show target debugging."), _("\
5087 When non-zero, target debugging is enabled. Higher numbers are more\n\
5088 verbose. Changes do not take effect until the next \"run\" or \"target\"\n\
5092 &setdebuglist, &showdebuglist);
5094 add_setshow_boolean_cmd ("trust-readonly-sections", class_support,
5095 &trust_readonly, _("\
5096 Set mode for reading from readonly sections."), _("\
5097 Show mode for reading from readonly sections."), _("\
5098 When this mode is on, memory reads from readonly sections (such as .text)\n\
5099 will be read from the object file instead of from the target. This will\n\
5100 result in significant performance improvement for remote targets."),
5102 show_trust_readonly,
5103 &setlist, &showlist);
5105 add_com ("monitor", class_obscure, do_monitor_command,
5106 _("Send a command to the remote monitor (remote targets only)."));
5108 add_cmd ("target-stack", class_maintenance, maintenance_print_target_stack,
5109 _("Print the name of each layer of the internal target stack."),
5110 &maintenanceprintlist);
5112 add_setshow_boolean_cmd ("target-async", no_class,
5113 &target_async_permitted_1, _("\
5114 Set whether gdb controls the inferior in asynchronous mode."), _("\
5115 Show whether gdb controls the inferior in asynchronous mode."), _("\
5116 Tells gdb whether to control the inferior in asynchronous mode."),
5117 set_target_async_command,
5118 show_target_async_command,
5122 add_setshow_boolean_cmd ("may-write-registers", class_support,
5123 &may_write_registers_1, _("\
5124 Set permission to write into registers."), _("\
5125 Show permission to write into registers."), _("\
5126 When this permission is on, GDB may write into the target's registers.\n\
5127 Otherwise, any sort of write attempt will result in an error."),
5128 set_target_permissions, NULL,
5129 &setlist, &showlist);
5131 add_setshow_boolean_cmd ("may-write-memory", class_support,
5132 &may_write_memory_1, _("\
5133 Set permission to write into target memory."), _("\
5134 Show permission to write into target memory."), _("\
5135 When this permission is on, GDB may write into the target's memory.\n\
5136 Otherwise, any sort of write attempt will result in an error."),
5137 set_write_memory_permission, NULL,
5138 &setlist, &showlist);
5140 add_setshow_boolean_cmd ("may-insert-breakpoints", class_support,
5141 &may_insert_breakpoints_1, _("\
5142 Set permission to insert breakpoints in the target."), _("\
5143 Show permission to insert breakpoints in the target."), _("\
5144 When this permission is on, GDB may insert breakpoints in the program.\n\
5145 Otherwise, any sort of insertion attempt will result in an error."),
5146 set_target_permissions, NULL,
5147 &setlist, &showlist);
5149 add_setshow_boolean_cmd ("may-insert-tracepoints", class_support,
5150 &may_insert_tracepoints_1, _("\
5151 Set permission to insert tracepoints in the target."), _("\
5152 Show permission to insert tracepoints in the target."), _("\
5153 When this permission is on, GDB may insert tracepoints in the program.\n\
5154 Otherwise, any sort of insertion attempt will result in an error."),
5155 set_target_permissions, NULL,
5156 &setlist, &showlist);
5158 add_setshow_boolean_cmd ("may-insert-fast-tracepoints", class_support,
5159 &may_insert_fast_tracepoints_1, _("\
5160 Set permission to insert fast tracepoints in the target."), _("\
5161 Show permission to insert fast tracepoints in the target."), _("\
5162 When this permission is on, GDB may insert fast tracepoints.\n\
5163 Otherwise, any sort of insertion attempt will result in an error."),
5164 set_target_permissions, NULL,
5165 &setlist, &showlist);
5167 add_setshow_boolean_cmd ("may-interrupt", class_support,
5169 Set permission to interrupt or signal the target."), _("\
5170 Show permission to interrupt or signal the target."), _("\
5171 When this permission is on, GDB may interrupt/stop the target's execution.\n\
5172 Otherwise, any attempt to interrupt or stop will be ignored."),
5173 set_target_permissions, NULL,
5174 &setlist, &showlist);