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_one (void);
68 static int return_minus_one (void);
70 static void *return_null (void);
72 void target_ignore (void);
74 static void target_command (char *, int);
76 static struct target_ops *find_default_run_target (char *);
78 static target_xfer_partial_ftype default_xfer_partial;
80 static struct gdbarch *default_thread_architecture (struct target_ops *ops,
83 static int find_default_can_async_p (struct target_ops *ignore);
85 static int find_default_is_async_p (struct target_ops *ignore);
87 #include "target-delegates.c"
89 static void init_dummy_target (void);
91 static struct target_ops debug_target;
93 static void debug_to_open (char *, int);
95 static void debug_to_prepare_to_store (struct target_ops *self,
98 static void debug_to_files_info (struct target_ops *);
100 static int debug_to_insert_breakpoint (struct target_ops *, struct gdbarch *,
101 struct bp_target_info *);
103 static int debug_to_remove_breakpoint (struct target_ops *, struct gdbarch *,
104 struct bp_target_info *);
106 static int debug_to_can_use_hw_breakpoint (struct target_ops *self,
109 static int debug_to_insert_hw_breakpoint (struct target_ops *self,
111 struct bp_target_info *);
113 static int debug_to_remove_hw_breakpoint (struct target_ops *self,
115 struct bp_target_info *);
117 static int debug_to_insert_watchpoint (struct target_ops *self,
119 struct expression *);
121 static int debug_to_remove_watchpoint (struct target_ops *self,
123 struct expression *);
125 static int debug_to_stopped_data_address (struct target_ops *, CORE_ADDR *);
127 static int debug_to_watchpoint_addr_within_range (struct target_ops *,
128 CORE_ADDR, CORE_ADDR, int);
130 static int debug_to_region_ok_for_hw_watchpoint (struct target_ops *self,
133 static int debug_to_can_accel_watchpoint_condition (struct target_ops *self,
135 struct expression *);
137 static void debug_to_terminal_init (struct target_ops *self);
139 static void debug_to_terminal_inferior (struct target_ops *self);
141 static void debug_to_terminal_ours_for_output (struct target_ops *self);
143 static void debug_to_terminal_save_ours (struct target_ops *self);
145 static void debug_to_terminal_ours (struct target_ops *self);
147 static void debug_to_load (struct target_ops *self, char *, int);
149 static int debug_to_can_run (struct target_ops *self);
151 static void debug_to_stop (struct target_ops *self, ptid_t);
153 /* Pointer to array of target architecture structures; the size of the
154 array; the current index into the array; the allocated size of the
156 struct target_ops **target_structs;
157 unsigned target_struct_size;
158 unsigned target_struct_allocsize;
159 #define DEFAULT_ALLOCSIZE 10
161 /* The initial current target, so that there is always a semi-valid
164 static struct target_ops dummy_target;
166 /* Top of target stack. */
168 static struct target_ops *target_stack;
170 /* The target structure we are currently using to talk to a process
171 or file or whatever "inferior" we have. */
173 struct target_ops current_target;
175 /* Command list for target. */
177 static struct cmd_list_element *targetlist = NULL;
179 /* Nonzero if we should trust readonly sections from the
180 executable when reading memory. */
182 static int trust_readonly = 0;
184 /* Nonzero if we should show true memory content including
185 memory breakpoint inserted by gdb. */
187 static int show_memory_breakpoints = 0;
189 /* These globals control whether GDB attempts to perform these
190 operations; they are useful for targets that need to prevent
191 inadvertant disruption, such as in non-stop mode. */
193 int may_write_registers = 1;
195 int may_write_memory = 1;
197 int may_insert_breakpoints = 1;
199 int may_insert_tracepoints = 1;
201 int may_insert_fast_tracepoints = 1;
205 /* Non-zero if we want to see trace of target level stuff. */
207 static unsigned int targetdebug = 0;
209 show_targetdebug (struct ui_file *file, int from_tty,
210 struct cmd_list_element *c, const char *value)
212 fprintf_filtered (file, _("Target debugging is %s.\n"), value);
215 static void setup_target_debug (void);
217 /* The user just typed 'target' without the name of a target. */
220 target_command (char *arg, int from_tty)
222 fputs_filtered ("Argument required (target name). Try `help target'\n",
226 /* Default target_has_* methods for process_stratum targets. */
229 default_child_has_all_memory (struct target_ops *ops)
231 /* If no inferior selected, then we can't read memory here. */
232 if (ptid_equal (inferior_ptid, null_ptid))
239 default_child_has_memory (struct target_ops *ops)
241 /* If no inferior selected, then we can't read memory here. */
242 if (ptid_equal (inferior_ptid, null_ptid))
249 default_child_has_stack (struct target_ops *ops)
251 /* If no inferior selected, there's no stack. */
252 if (ptid_equal (inferior_ptid, null_ptid))
259 default_child_has_registers (struct target_ops *ops)
261 /* Can't read registers from no inferior. */
262 if (ptid_equal (inferior_ptid, null_ptid))
269 default_child_has_execution (struct target_ops *ops, ptid_t the_ptid)
271 /* If there's no thread selected, then we can't make it run through
273 if (ptid_equal (the_ptid, null_ptid))
281 target_has_all_memory_1 (void)
283 struct target_ops *t;
285 for (t = current_target.beneath; t != NULL; t = t->beneath)
286 if (t->to_has_all_memory (t))
293 target_has_memory_1 (void)
295 struct target_ops *t;
297 for (t = current_target.beneath; t != NULL; t = t->beneath)
298 if (t->to_has_memory (t))
305 target_has_stack_1 (void)
307 struct target_ops *t;
309 for (t = current_target.beneath; t != NULL; t = t->beneath)
310 if (t->to_has_stack (t))
317 target_has_registers_1 (void)
319 struct target_ops *t;
321 for (t = current_target.beneath; t != NULL; t = t->beneath)
322 if (t->to_has_registers (t))
329 target_has_execution_1 (ptid_t the_ptid)
331 struct target_ops *t;
333 for (t = current_target.beneath; t != NULL; t = t->beneath)
334 if (t->to_has_execution (t, the_ptid))
341 target_has_execution_current (void)
343 return target_has_execution_1 (inferior_ptid);
346 /* Complete initialization of T. This ensures that various fields in
347 T are set, if needed by the target implementation. */
350 complete_target_initialization (struct target_ops *t)
352 /* Provide default values for all "must have" methods. */
353 if (t->to_xfer_partial == NULL)
354 t->to_xfer_partial = default_xfer_partial;
356 if (t->to_has_all_memory == NULL)
357 t->to_has_all_memory = (int (*) (struct target_ops *)) return_zero;
359 if (t->to_has_memory == NULL)
360 t->to_has_memory = (int (*) (struct target_ops *)) return_zero;
362 if (t->to_has_stack == NULL)
363 t->to_has_stack = (int (*) (struct target_ops *)) return_zero;
365 if (t->to_has_registers == NULL)
366 t->to_has_registers = (int (*) (struct target_ops *)) return_zero;
368 if (t->to_has_execution == NULL)
369 t->to_has_execution = (int (*) (struct target_ops *, ptid_t)) return_zero;
371 install_delegators (t);
374 /* Add possible target architecture T to the list and add a new
375 command 'target T->to_shortname'. Set COMPLETER as the command's
376 completer if not NULL. */
379 add_target_with_completer (struct target_ops *t,
380 completer_ftype *completer)
382 struct cmd_list_element *c;
384 complete_target_initialization (t);
388 target_struct_allocsize = DEFAULT_ALLOCSIZE;
389 target_structs = (struct target_ops **) xmalloc
390 (target_struct_allocsize * sizeof (*target_structs));
392 if (target_struct_size >= target_struct_allocsize)
394 target_struct_allocsize *= 2;
395 target_structs = (struct target_ops **)
396 xrealloc ((char *) target_structs,
397 target_struct_allocsize * sizeof (*target_structs));
399 target_structs[target_struct_size++] = t;
401 if (targetlist == NULL)
402 add_prefix_cmd ("target", class_run, target_command, _("\
403 Connect to a target machine or process.\n\
404 The first argument is the type or protocol of the target machine.\n\
405 Remaining arguments are interpreted by the target protocol. For more\n\
406 information on the arguments for a particular protocol, type\n\
407 `help target ' followed by the protocol name."),
408 &targetlist, "target ", 0, &cmdlist);
409 c = add_cmd (t->to_shortname, no_class, t->to_open, t->to_doc,
411 if (completer != NULL)
412 set_cmd_completer (c, completer);
415 /* Add a possible target architecture to the list. */
418 add_target (struct target_ops *t)
420 add_target_with_completer (t, NULL);
426 add_deprecated_target_alias (struct target_ops *t, char *alias)
428 struct cmd_list_element *c;
431 /* If we use add_alias_cmd, here, we do not get the deprecated warning,
433 c = add_cmd (alias, no_class, t->to_open, t->to_doc, &targetlist);
434 alt = xstrprintf ("target %s", t->to_shortname);
435 deprecate_cmd (c, alt);
448 struct target_ops *t;
450 for (t = current_target.beneath; t != NULL; t = t->beneath)
451 if (t->to_kill != NULL)
454 fprintf_unfiltered (gdb_stdlog, "target_kill ()\n");
464 target_load (char *arg, int from_tty)
466 target_dcache_invalidate ();
467 (*current_target.to_load) (¤t_target, arg, from_tty);
471 target_create_inferior (char *exec_file, char *args,
472 char **env, int from_tty)
474 struct target_ops *t;
476 for (t = current_target.beneath; t != NULL; t = t->beneath)
478 if (t->to_create_inferior != NULL)
480 t->to_create_inferior (t, exec_file, args, env, from_tty);
482 fprintf_unfiltered (gdb_stdlog,
483 "target_create_inferior (%s, %s, xxx, %d)\n",
484 exec_file, args, from_tty);
489 internal_error (__FILE__, __LINE__,
490 _("could not find a target to create inferior"));
494 target_terminal_inferior (void)
496 /* A background resume (``run&'') should leave GDB in control of the
497 terminal. Use target_can_async_p, not target_is_async_p, since at
498 this point the target is not async yet. However, if sync_execution
499 is not set, we know it will become async prior to resume. */
500 if (target_can_async_p () && !sync_execution)
503 /* If GDB is resuming the inferior in the foreground, install
504 inferior's terminal modes. */
505 (*current_target.to_terminal_inferior) (¤t_target);
509 nomemory (CORE_ADDR memaddr, char *myaddr, int len, int write,
510 struct target_ops *t)
512 errno = EIO; /* Can't read/write this location. */
513 return 0; /* No bytes handled. */
519 error (_("You can't do that when your target is `%s'"),
520 current_target.to_shortname);
526 error (_("You can't do that without a process to debug."));
530 default_terminal_info (struct target_ops *self, const char *args, int from_tty)
532 printf_unfiltered (_("No saved terminal information.\n"));
535 /* A default implementation for the to_get_ada_task_ptid target method.
537 This function builds the PTID by using both LWP and TID as part of
538 the PTID lwp and tid elements. The pid used is the pid of the
542 default_get_ada_task_ptid (struct target_ops *self, long lwp, long tid)
544 return ptid_build (ptid_get_pid (inferior_ptid), lwp, tid);
547 static enum exec_direction_kind
548 default_execution_direction (struct target_ops *self)
550 if (!target_can_execute_reverse)
552 else if (!target_can_async_p ())
555 gdb_assert_not_reached ("\
556 to_execution_direction must be implemented for reverse async");
559 /* Go through the target stack from top to bottom, copying over zero
560 entries in current_target, then filling in still empty entries. In
561 effect, we are doing class inheritance through the pushed target
564 NOTE: cagney/2003-10-17: The problem with this inheritance, as it
565 is currently implemented, is that it discards any knowledge of
566 which target an inherited method originally belonged to.
567 Consequently, new new target methods should instead explicitly and
568 locally search the target stack for the target that can handle the
572 update_current_target (void)
574 struct target_ops *t;
576 /* First, reset current's contents. */
577 memset (¤t_target, 0, sizeof (current_target));
579 /* Install the delegators. */
580 install_delegators (¤t_target);
582 #define INHERIT(FIELD, TARGET) \
583 if (!current_target.FIELD) \
584 current_target.FIELD = (TARGET)->FIELD
586 for (t = target_stack; t; t = t->beneath)
588 INHERIT (to_shortname, t);
589 INHERIT (to_longname, t);
591 /* Do not inherit to_open. */
592 /* Do not inherit to_close. */
593 /* Do not inherit to_attach. */
594 /* Do not inherit to_post_attach. */
595 INHERIT (to_attach_no_wait, t);
596 /* Do not inherit to_detach. */
597 /* Do not inherit to_disconnect. */
598 /* Do not inherit to_resume. */
599 /* Do not inherit to_wait. */
600 /* Do not inherit to_fetch_registers. */
601 /* Do not inherit to_store_registers. */
602 /* Do not inherit to_prepare_to_store. */
603 INHERIT (deprecated_xfer_memory, t);
604 /* Do not inherit to_files_info. */
605 /* Do not inherit to_insert_breakpoint. */
606 /* Do not inherit to_remove_breakpoint. */
607 /* Do not inherit to_can_use_hw_breakpoint. */
608 /* Do not inherit to_insert_hw_breakpoint. */
609 /* Do not inherit to_remove_hw_breakpoint. */
610 /* Do not inherit to_ranged_break_num_registers. */
611 /* Do not inherit to_insert_watchpoint. */
612 /* Do not inherit to_remove_watchpoint. */
613 /* Do not inherit to_insert_mask_watchpoint. */
614 /* Do not inherit to_remove_mask_watchpoint. */
615 /* Do not inherit to_stopped_data_address. */
616 INHERIT (to_have_steppable_watchpoint, t);
617 INHERIT (to_have_continuable_watchpoint, t);
618 /* Do not inherit to_stopped_by_watchpoint. */
619 /* Do not inherit to_watchpoint_addr_within_range. */
620 /* Do not inherit to_region_ok_for_hw_watchpoint. */
621 /* Do not inherit to_can_accel_watchpoint_condition. */
622 /* Do not inherit to_masked_watch_num_registers. */
623 /* Do not inherit to_terminal_init. */
624 /* Do not inherit to_terminal_inferior. */
625 /* Do not inherit to_terminal_ours_for_output. */
626 /* Do not inherit to_terminal_ours. */
627 /* Do not inherit to_terminal_save_ours. */
628 /* Do not inherit to_terminal_info. */
629 /* Do not inherit to_kill. */
630 /* Do not inherit to_load. */
631 /* Do no inherit to_create_inferior. */
632 /* Do not inherit to_post_startup_inferior. */
633 /* Do not inherit to_insert_fork_catchpoint. */
634 /* Do not inherit to_remove_fork_catchpoint. */
635 /* Do not inherit to_insert_vfork_catchpoint. */
636 INHERIT (to_remove_vfork_catchpoint, t);
637 /* Do not inherit to_follow_fork. */
638 INHERIT (to_insert_exec_catchpoint, t);
639 INHERIT (to_remove_exec_catchpoint, t);
640 INHERIT (to_set_syscall_catchpoint, t);
641 INHERIT (to_has_exited, t);
642 /* Do not inherit to_mourn_inferior. */
643 INHERIT (to_can_run, t);
644 /* Do not inherit to_pass_signals. */
645 /* Do not inherit to_program_signals. */
646 /* Do not inherit to_thread_alive. */
647 /* Do not inherit to_find_new_threads. */
648 /* Do not inherit to_pid_to_str. */
649 INHERIT (to_extra_thread_info, t);
650 INHERIT (to_thread_name, t);
651 INHERIT (to_stop, t);
652 /* Do not inherit to_xfer_partial. */
653 /* Do not inherit to_rcmd. */
654 INHERIT (to_pid_to_exec_file, t);
655 INHERIT (to_log_command, t);
656 INHERIT (to_stratum, t);
657 /* Do not inherit to_has_all_memory. */
658 /* Do not inherit to_has_memory. */
659 /* Do not inherit to_has_stack. */
660 /* Do not inherit to_has_registers. */
661 /* Do not inherit to_has_execution. */
662 INHERIT (to_has_thread_control, t);
663 /* Do not inherit to_can_async_p. */
664 /* Do not inherit to_is_async_p. */
665 /* Do not inherit to_async. */
666 INHERIT (to_find_memory_regions, t);
667 INHERIT (to_make_corefile_notes, t);
668 INHERIT (to_get_bookmark, t);
669 INHERIT (to_goto_bookmark, t);
670 /* Do not inherit to_get_thread_local_address. */
671 INHERIT (to_can_execute_reverse, t);
672 INHERIT (to_execution_direction, t);
673 INHERIT (to_thread_architecture, t);
674 /* Do not inherit to_read_description. */
675 INHERIT (to_get_ada_task_ptid, t);
676 /* Do not inherit to_search_memory. */
677 INHERIT (to_supports_multi_process, t);
678 INHERIT (to_supports_enable_disable_tracepoint, t);
679 INHERIT (to_supports_string_tracing, t);
680 INHERIT (to_trace_init, t);
681 INHERIT (to_download_tracepoint, t);
682 INHERIT (to_can_download_tracepoint, t);
683 INHERIT (to_download_trace_state_variable, t);
684 INHERIT (to_enable_tracepoint, t);
685 INHERIT (to_disable_tracepoint, t);
686 INHERIT (to_trace_set_readonly_regions, t);
687 INHERIT (to_trace_start, t);
688 INHERIT (to_get_trace_status, t);
689 INHERIT (to_get_tracepoint_status, t);
690 INHERIT (to_trace_stop, t);
691 INHERIT (to_trace_find, t);
692 INHERIT (to_get_trace_state_variable_value, t);
693 INHERIT (to_save_trace_data, t);
694 INHERIT (to_upload_tracepoints, t);
695 INHERIT (to_upload_trace_state_variables, t);
696 INHERIT (to_get_raw_trace_data, t);
697 INHERIT (to_get_min_fast_tracepoint_insn_len, t);
698 INHERIT (to_set_disconnected_tracing, t);
699 INHERIT (to_set_circular_trace_buffer, t);
700 INHERIT (to_set_trace_buffer_size, t);
701 INHERIT (to_set_trace_notes, t);
702 INHERIT (to_get_tib_address, t);
703 INHERIT (to_set_permissions, t);
704 INHERIT (to_static_tracepoint_marker_at, t);
705 INHERIT (to_static_tracepoint_markers_by_strid, t);
706 INHERIT (to_traceframe_info, t);
707 INHERIT (to_use_agent, t);
708 INHERIT (to_can_use_agent, t);
709 INHERIT (to_augmented_libraries_svr4_read, t);
710 INHERIT (to_magic, t);
711 INHERIT (to_supports_evaluation_of_breakpoint_conditions, t);
712 INHERIT (to_can_run_breakpoint_commands, t);
713 /* Do not inherit to_memory_map. */
714 /* Do not inherit to_flash_erase. */
715 /* Do not inherit to_flash_done. */
719 /* Clean up a target struct so it no longer has any zero pointers in
720 it. Some entries are defaulted to a method that print an error,
721 others are hard-wired to a standard recursive default. */
723 #define de_fault(field, value) \
724 if (!current_target.field) \
725 current_target.field = value
728 (void (*) (char *, int))
731 (void (*) (struct target_ops *))
733 de_fault (deprecated_xfer_memory,
734 (int (*) (CORE_ADDR, gdb_byte *, int, int,
735 struct mem_attrib *, struct target_ops *))
737 de_fault (to_remove_vfork_catchpoint,
738 (int (*) (struct target_ops *, int))
740 de_fault (to_insert_exec_catchpoint,
741 (int (*) (struct target_ops *, int))
743 de_fault (to_remove_exec_catchpoint,
744 (int (*) (struct target_ops *, int))
746 de_fault (to_set_syscall_catchpoint,
747 (int (*) (struct target_ops *, int, int, int, int, int *))
749 de_fault (to_has_exited,
750 (int (*) (struct target_ops *, int, int, int *))
752 de_fault (to_can_run,
753 (int (*) (struct target_ops *))
755 de_fault (to_extra_thread_info,
756 (char *(*) (struct target_ops *, struct thread_info *))
758 de_fault (to_thread_name,
759 (char *(*) (struct target_ops *, struct thread_info *))
762 (void (*) (struct target_ops *, ptid_t))
764 de_fault (to_pid_to_exec_file,
765 (char *(*) (struct target_ops *, int))
767 de_fault (to_thread_architecture,
768 default_thread_architecture);
769 current_target.to_read_description = NULL;
770 de_fault (to_get_ada_task_ptid,
771 (ptid_t (*) (struct target_ops *, long, long))
772 default_get_ada_task_ptid);
773 de_fault (to_supports_multi_process,
774 (int (*) (struct target_ops *))
776 de_fault (to_supports_enable_disable_tracepoint,
777 (int (*) (struct target_ops *))
779 de_fault (to_supports_string_tracing,
780 (int (*) (struct target_ops *))
782 de_fault (to_trace_init,
783 (void (*) (struct target_ops *))
785 de_fault (to_download_tracepoint,
786 (void (*) (struct target_ops *, struct bp_location *))
788 de_fault (to_can_download_tracepoint,
789 (int (*) (struct target_ops *))
791 de_fault (to_download_trace_state_variable,
792 (void (*) (struct target_ops *, struct trace_state_variable *))
794 de_fault (to_enable_tracepoint,
795 (void (*) (struct target_ops *, struct bp_location *))
797 de_fault (to_disable_tracepoint,
798 (void (*) (struct target_ops *, struct bp_location *))
800 de_fault (to_trace_set_readonly_regions,
801 (void (*) (struct target_ops *))
803 de_fault (to_trace_start,
804 (void (*) (struct target_ops *))
806 de_fault (to_get_trace_status,
807 (int (*) (struct target_ops *, struct trace_status *))
809 de_fault (to_get_tracepoint_status,
810 (void (*) (struct target_ops *, struct breakpoint *,
811 struct uploaded_tp *))
813 de_fault (to_trace_stop,
814 (void (*) (struct target_ops *))
816 de_fault (to_trace_find,
817 (int (*) (struct target_ops *,
818 enum trace_find_type, int, CORE_ADDR, CORE_ADDR, int *))
820 de_fault (to_get_trace_state_variable_value,
821 (int (*) (struct target_ops *, int, LONGEST *))
823 de_fault (to_save_trace_data,
824 (int (*) (struct target_ops *, const char *))
826 de_fault (to_upload_tracepoints,
827 (int (*) (struct target_ops *, struct uploaded_tp **))
829 de_fault (to_upload_trace_state_variables,
830 (int (*) (struct target_ops *, struct uploaded_tsv **))
832 de_fault (to_get_raw_trace_data,
833 (LONGEST (*) (struct target_ops *, gdb_byte *, ULONGEST, LONGEST))
835 de_fault (to_get_min_fast_tracepoint_insn_len,
836 (int (*) (struct target_ops *))
838 de_fault (to_set_disconnected_tracing,
839 (void (*) (struct target_ops *, int))
841 de_fault (to_set_circular_trace_buffer,
842 (void (*) (struct target_ops *, int))
844 de_fault (to_set_trace_buffer_size,
845 (void (*) (struct target_ops *, LONGEST))
847 de_fault (to_set_trace_notes,
848 (int (*) (struct target_ops *,
849 const char *, const char *, const char *))
851 de_fault (to_get_tib_address,
852 (int (*) (struct target_ops *, ptid_t, CORE_ADDR *))
854 de_fault (to_set_permissions,
855 (void (*) (struct target_ops *))
857 de_fault (to_static_tracepoint_marker_at,
858 (int (*) (struct target_ops *,
859 CORE_ADDR, struct static_tracepoint_marker *))
861 de_fault (to_static_tracepoint_markers_by_strid,
862 (VEC(static_tracepoint_marker_p) * (*) (struct target_ops *,
865 de_fault (to_traceframe_info,
866 (struct traceframe_info * (*) (struct target_ops *))
868 de_fault (to_supports_evaluation_of_breakpoint_conditions,
869 (int (*) (struct target_ops *))
871 de_fault (to_can_run_breakpoint_commands,
872 (int (*) (struct target_ops *))
874 de_fault (to_use_agent,
875 (int (*) (struct target_ops *, int))
877 de_fault (to_can_use_agent,
878 (int (*) (struct target_ops *))
880 de_fault (to_augmented_libraries_svr4_read,
881 (int (*) (struct target_ops *))
883 de_fault (to_execution_direction, default_execution_direction);
887 /* Finally, position the target-stack beneath the squashed
888 "current_target". That way code looking for a non-inherited
889 target method can quickly and simply find it. */
890 current_target.beneath = target_stack;
893 setup_target_debug ();
896 /* Push a new target type into the stack of the existing target accessors,
897 possibly superseding some of the existing accessors.
899 Rather than allow an empty stack, we always have the dummy target at
900 the bottom stratum, so we can call the function vectors without
904 push_target (struct target_ops *t)
906 struct target_ops **cur;
908 /* Check magic number. If wrong, it probably means someone changed
909 the struct definition, but not all the places that initialize one. */
910 if (t->to_magic != OPS_MAGIC)
912 fprintf_unfiltered (gdb_stderr,
913 "Magic number of %s target struct wrong\n",
915 internal_error (__FILE__, __LINE__,
916 _("failed internal consistency check"));
919 /* Find the proper stratum to install this target in. */
920 for (cur = &target_stack; (*cur) != NULL; cur = &(*cur)->beneath)
922 if ((int) (t->to_stratum) >= (int) (*cur)->to_stratum)
926 /* If there's already targets at this stratum, remove them. */
927 /* FIXME: cagney/2003-10-15: I think this should be popping all
928 targets to CUR, and not just those at this stratum level. */
929 while ((*cur) != NULL && t->to_stratum == (*cur)->to_stratum)
931 /* There's already something at this stratum level. Close it,
932 and un-hook it from the stack. */
933 struct target_ops *tmp = (*cur);
935 (*cur) = (*cur)->beneath;
940 /* We have removed all targets in our stratum, now add the new one. */
944 update_current_target ();
947 /* Remove a target_ops vector from the stack, wherever it may be.
948 Return how many times it was removed (0 or 1). */
951 unpush_target (struct target_ops *t)
953 struct target_ops **cur;
954 struct target_ops *tmp;
956 if (t->to_stratum == dummy_stratum)
957 internal_error (__FILE__, __LINE__,
958 _("Attempt to unpush the dummy target"));
960 /* Look for the specified target. Note that we assume that a target
961 can only occur once in the target stack. */
963 for (cur = &target_stack; (*cur) != NULL; cur = &(*cur)->beneath)
969 /* If we don't find target_ops, quit. Only open targets should be
974 /* Unchain the target. */
976 (*cur) = (*cur)->beneath;
979 update_current_target ();
981 /* Finally close the target. Note we do this after unchaining, so
982 any target method calls from within the target_close
983 implementation don't end up in T anymore. */
990 pop_all_targets_above (enum strata above_stratum)
992 while ((int) (current_target.to_stratum) > (int) above_stratum)
994 if (!unpush_target (target_stack))
996 fprintf_unfiltered (gdb_stderr,
997 "pop_all_targets couldn't find target %s\n",
998 target_stack->to_shortname);
999 internal_error (__FILE__, __LINE__,
1000 _("failed internal consistency check"));
1007 pop_all_targets (void)
1009 pop_all_targets_above (dummy_stratum);
1012 /* Return 1 if T is now pushed in the target stack. Return 0 otherwise. */
1015 target_is_pushed (struct target_ops *t)
1017 struct target_ops **cur;
1019 /* Check magic number. If wrong, it probably means someone changed
1020 the struct definition, but not all the places that initialize one. */
1021 if (t->to_magic != OPS_MAGIC)
1023 fprintf_unfiltered (gdb_stderr,
1024 "Magic number of %s target struct wrong\n",
1026 internal_error (__FILE__, __LINE__,
1027 _("failed internal consistency check"));
1030 for (cur = &target_stack; (*cur) != NULL; cur = &(*cur)->beneath)
1037 /* Using the objfile specified in OBJFILE, find the address for the
1038 current thread's thread-local storage with offset OFFSET. */
1040 target_translate_tls_address (struct objfile *objfile, CORE_ADDR offset)
1042 volatile CORE_ADDR addr = 0;
1043 struct target_ops *target;
1045 for (target = current_target.beneath;
1047 target = target->beneath)
1049 if (target->to_get_thread_local_address != NULL)
1054 && gdbarch_fetch_tls_load_module_address_p (target_gdbarch ()))
1056 ptid_t ptid = inferior_ptid;
1057 volatile struct gdb_exception ex;
1059 TRY_CATCH (ex, RETURN_MASK_ALL)
1063 /* Fetch the load module address for this objfile. */
1064 lm_addr = gdbarch_fetch_tls_load_module_address (target_gdbarch (),
1066 /* If it's 0, throw the appropriate exception. */
1068 throw_error (TLS_LOAD_MODULE_NOT_FOUND_ERROR,
1069 _("TLS load module not found"));
1071 addr = target->to_get_thread_local_address (target, ptid,
1074 /* If an error occurred, print TLS related messages here. Otherwise,
1075 throw the error to some higher catcher. */
1078 int objfile_is_library = (objfile->flags & OBJF_SHARED);
1082 case TLS_NO_LIBRARY_SUPPORT_ERROR:
1083 error (_("Cannot find thread-local variables "
1084 "in this thread library."));
1086 case TLS_LOAD_MODULE_NOT_FOUND_ERROR:
1087 if (objfile_is_library)
1088 error (_("Cannot find shared library `%s' in dynamic"
1089 " linker's load module list"), objfile_name (objfile));
1091 error (_("Cannot find executable file `%s' in dynamic"
1092 " linker's load module list"), objfile_name (objfile));
1094 case TLS_NOT_ALLOCATED_YET_ERROR:
1095 if (objfile_is_library)
1096 error (_("The inferior has not yet allocated storage for"
1097 " thread-local variables in\n"
1098 "the shared library `%s'\n"
1100 objfile_name (objfile), target_pid_to_str (ptid));
1102 error (_("The inferior has not yet allocated storage for"
1103 " thread-local variables in\n"
1104 "the executable `%s'\n"
1106 objfile_name (objfile), target_pid_to_str (ptid));
1108 case TLS_GENERIC_ERROR:
1109 if (objfile_is_library)
1110 error (_("Cannot find thread-local storage for %s, "
1111 "shared library %s:\n%s"),
1112 target_pid_to_str (ptid),
1113 objfile_name (objfile), ex.message);
1115 error (_("Cannot find thread-local storage for %s, "
1116 "executable file %s:\n%s"),
1117 target_pid_to_str (ptid),
1118 objfile_name (objfile), ex.message);
1121 throw_exception (ex);
1126 /* It wouldn't be wrong here to try a gdbarch method, too; finding
1127 TLS is an ABI-specific thing. But we don't do that yet. */
1129 error (_("Cannot find thread-local variables on this target"));
1135 target_xfer_status_to_string (enum target_xfer_status err)
1137 #define CASE(X) case X: return #X
1140 CASE(TARGET_XFER_E_IO);
1141 CASE(TARGET_XFER_E_UNAVAILABLE);
1150 #define MIN(A, B) (((A) <= (B)) ? (A) : (B))
1152 /* target_read_string -- read a null terminated string, up to LEN bytes,
1153 from MEMADDR in target. Set *ERRNOP to the errno code, or 0 if successful.
1154 Set *STRING to a pointer to malloc'd memory containing the data; the caller
1155 is responsible for freeing it. Return the number of bytes successfully
1159 target_read_string (CORE_ADDR memaddr, char **string, int len, int *errnop)
1161 int tlen, offset, i;
1165 int buffer_allocated;
1167 unsigned int nbytes_read = 0;
1169 gdb_assert (string);
1171 /* Small for testing. */
1172 buffer_allocated = 4;
1173 buffer = xmalloc (buffer_allocated);
1178 tlen = MIN (len, 4 - (memaddr & 3));
1179 offset = memaddr & 3;
1181 errcode = target_read_memory (memaddr & ~3, buf, sizeof buf);
1184 /* The transfer request might have crossed the boundary to an
1185 unallocated region of memory. Retry the transfer, requesting
1189 errcode = target_read_memory (memaddr, buf, 1);
1194 if (bufptr - buffer + tlen > buffer_allocated)
1198 bytes = bufptr - buffer;
1199 buffer_allocated *= 2;
1200 buffer = xrealloc (buffer, buffer_allocated);
1201 bufptr = buffer + bytes;
1204 for (i = 0; i < tlen; i++)
1206 *bufptr++ = buf[i + offset];
1207 if (buf[i + offset] == '\000')
1209 nbytes_read += i + 1;
1216 nbytes_read += tlen;
1225 struct target_section_table *
1226 target_get_section_table (struct target_ops *target)
1228 struct target_ops *t;
1231 fprintf_unfiltered (gdb_stdlog, "target_get_section_table ()\n");
1233 for (t = target; t != NULL; t = t->beneath)
1234 if (t->to_get_section_table != NULL)
1235 return (*t->to_get_section_table) (t);
1240 /* Find a section containing ADDR. */
1242 struct target_section *
1243 target_section_by_addr (struct target_ops *target, CORE_ADDR addr)
1245 struct target_section_table *table = target_get_section_table (target);
1246 struct target_section *secp;
1251 for (secp = table->sections; secp < table->sections_end; secp++)
1253 if (addr >= secp->addr && addr < secp->endaddr)
1259 /* Read memory from the live target, even if currently inspecting a
1260 traceframe. The return is the same as that of target_read. */
1262 static enum target_xfer_status
1263 target_read_live_memory (enum target_object object,
1264 ULONGEST memaddr, gdb_byte *myaddr, ULONGEST len,
1265 ULONGEST *xfered_len)
1267 enum target_xfer_status ret;
1268 struct cleanup *cleanup;
1270 /* Switch momentarily out of tfind mode so to access live memory.
1271 Note that this must not clear global state, such as the frame
1272 cache, which must still remain valid for the previous traceframe.
1273 We may be _building_ the frame cache at this point. */
1274 cleanup = make_cleanup_restore_traceframe_number ();
1275 set_traceframe_number (-1);
1277 ret = target_xfer_partial (current_target.beneath, object, NULL,
1278 myaddr, NULL, memaddr, len, xfered_len);
1280 do_cleanups (cleanup);
1284 /* Using the set of read-only target sections of OPS, read live
1285 read-only memory. Note that the actual reads start from the
1286 top-most target again.
1288 For interface/parameters/return description see target.h,
1291 static enum target_xfer_status
1292 memory_xfer_live_readonly_partial (struct target_ops *ops,
1293 enum target_object object,
1294 gdb_byte *readbuf, ULONGEST memaddr,
1295 ULONGEST len, ULONGEST *xfered_len)
1297 struct target_section *secp;
1298 struct target_section_table *table;
1300 secp = target_section_by_addr (ops, memaddr);
1302 && (bfd_get_section_flags (secp->the_bfd_section->owner,
1303 secp->the_bfd_section)
1306 struct target_section *p;
1307 ULONGEST memend = memaddr + len;
1309 table = target_get_section_table (ops);
1311 for (p = table->sections; p < table->sections_end; p++)
1313 if (memaddr >= p->addr)
1315 if (memend <= p->endaddr)
1317 /* Entire transfer is within this section. */
1318 return target_read_live_memory (object, memaddr,
1319 readbuf, len, xfered_len);
1321 else if (memaddr >= p->endaddr)
1323 /* This section ends before the transfer starts. */
1328 /* This section overlaps the transfer. Just do half. */
1329 len = p->endaddr - memaddr;
1330 return target_read_live_memory (object, memaddr,
1331 readbuf, len, xfered_len);
1337 return TARGET_XFER_EOF;
1340 /* Read memory from more than one valid target. A core file, for
1341 instance, could have some of memory but delegate other bits to
1342 the target below it. So, we must manually try all targets. */
1344 static enum target_xfer_status
1345 raw_memory_xfer_partial (struct target_ops *ops, gdb_byte *readbuf,
1346 const gdb_byte *writebuf, ULONGEST memaddr, LONGEST len,
1347 ULONGEST *xfered_len)
1349 enum target_xfer_status res;
1353 res = ops->to_xfer_partial (ops, TARGET_OBJECT_MEMORY, NULL,
1354 readbuf, writebuf, memaddr, len,
1356 if (res == TARGET_XFER_OK)
1359 /* Stop if the target reports that the memory is not available. */
1360 if (res == TARGET_XFER_E_UNAVAILABLE)
1363 /* We want to continue past core files to executables, but not
1364 past a running target's memory. */
1365 if (ops->to_has_all_memory (ops))
1370 while (ops != NULL);
1375 /* Perform a partial memory transfer.
1376 For docs see target.h, to_xfer_partial. */
1378 static enum target_xfer_status
1379 memory_xfer_partial_1 (struct target_ops *ops, enum target_object object,
1380 gdb_byte *readbuf, const gdb_byte *writebuf, ULONGEST memaddr,
1381 ULONGEST len, ULONGEST *xfered_len)
1383 enum target_xfer_status res;
1385 struct mem_region *region;
1386 struct inferior *inf;
1388 /* For accesses to unmapped overlay sections, read directly from
1389 files. Must do this first, as MEMADDR may need adjustment. */
1390 if (readbuf != NULL && overlay_debugging)
1392 struct obj_section *section = find_pc_overlay (memaddr);
1394 if (pc_in_unmapped_range (memaddr, section))
1396 struct target_section_table *table
1397 = target_get_section_table (ops);
1398 const char *section_name = section->the_bfd_section->name;
1400 memaddr = overlay_mapped_address (memaddr, section);
1401 return section_table_xfer_memory_partial (readbuf, writebuf,
1402 memaddr, len, xfered_len,
1404 table->sections_end,
1409 /* Try the executable files, if "trust-readonly-sections" is set. */
1410 if (readbuf != NULL && trust_readonly)
1412 struct target_section *secp;
1413 struct target_section_table *table;
1415 secp = target_section_by_addr (ops, memaddr);
1417 && (bfd_get_section_flags (secp->the_bfd_section->owner,
1418 secp->the_bfd_section)
1421 table = target_get_section_table (ops);
1422 return section_table_xfer_memory_partial (readbuf, writebuf,
1423 memaddr, len, xfered_len,
1425 table->sections_end,
1430 /* If reading unavailable memory in the context of traceframes, and
1431 this address falls within a read-only section, fallback to
1432 reading from live memory. */
1433 if (readbuf != NULL && get_traceframe_number () != -1)
1435 VEC(mem_range_s) *available;
1437 /* If we fail to get the set of available memory, then the
1438 target does not support querying traceframe info, and so we
1439 attempt reading from the traceframe anyway (assuming the
1440 target implements the old QTro packet then). */
1441 if (traceframe_available_memory (&available, memaddr, len))
1443 struct cleanup *old_chain;
1445 old_chain = make_cleanup (VEC_cleanup(mem_range_s), &available);
1447 if (VEC_empty (mem_range_s, available)
1448 || VEC_index (mem_range_s, available, 0)->start != memaddr)
1450 /* Don't read into the traceframe's available
1452 if (!VEC_empty (mem_range_s, available))
1454 LONGEST oldlen = len;
1456 len = VEC_index (mem_range_s, available, 0)->start - memaddr;
1457 gdb_assert (len <= oldlen);
1460 do_cleanups (old_chain);
1462 /* This goes through the topmost target again. */
1463 res = memory_xfer_live_readonly_partial (ops, object,
1466 if (res == TARGET_XFER_OK)
1467 return TARGET_XFER_OK;
1470 /* No use trying further, we know some memory starting
1471 at MEMADDR isn't available. */
1473 return TARGET_XFER_E_UNAVAILABLE;
1477 /* Don't try to read more than how much is available, in
1478 case the target implements the deprecated QTro packet to
1479 cater for older GDBs (the target's knowledge of read-only
1480 sections may be outdated by now). */
1481 len = VEC_index (mem_range_s, available, 0)->length;
1483 do_cleanups (old_chain);
1487 /* Try GDB's internal data cache. */
1488 region = lookup_mem_region (memaddr);
1489 /* region->hi == 0 means there's no upper bound. */
1490 if (memaddr + len < region->hi || region->hi == 0)
1493 reg_len = region->hi - memaddr;
1495 switch (region->attrib.mode)
1498 if (writebuf != NULL)
1499 return TARGET_XFER_E_IO;
1503 if (readbuf != NULL)
1504 return TARGET_XFER_E_IO;
1508 /* We only support writing to flash during "load" for now. */
1509 if (writebuf != NULL)
1510 error (_("Writing to flash memory forbidden in this context"));
1514 return TARGET_XFER_E_IO;
1517 if (!ptid_equal (inferior_ptid, null_ptid))
1518 inf = find_inferior_pid (ptid_get_pid (inferior_ptid));
1523 /* The dcache reads whole cache lines; that doesn't play well
1524 with reading from a trace buffer, because reading outside of
1525 the collected memory range fails. */
1526 && get_traceframe_number () == -1
1527 && (region->attrib.cache
1528 || (stack_cache_enabled_p () && object == TARGET_OBJECT_STACK_MEMORY)
1529 || (code_cache_enabled_p () && object == TARGET_OBJECT_CODE_MEMORY)))
1531 DCACHE *dcache = target_dcache_get_or_init ();
1534 if (readbuf != NULL)
1535 l = dcache_xfer_memory (ops, dcache, memaddr, readbuf, reg_len, 0);
1537 /* FIXME drow/2006-08-09: If we're going to preserve const
1538 correctness dcache_xfer_memory should take readbuf and
1540 l = dcache_xfer_memory (ops, dcache, memaddr, (void *) writebuf,
1543 return TARGET_XFER_E_IO;
1546 *xfered_len = (ULONGEST) l;
1547 return TARGET_XFER_OK;
1551 /* If none of those methods found the memory we wanted, fall back
1552 to a target partial transfer. Normally a single call to
1553 to_xfer_partial is enough; if it doesn't recognize an object
1554 it will call the to_xfer_partial of the next target down.
1555 But for memory this won't do. Memory is the only target
1556 object which can be read from more than one valid target.
1557 A core file, for instance, could have some of memory but
1558 delegate other bits to the target below it. So, we must
1559 manually try all targets. */
1561 res = raw_memory_xfer_partial (ops, readbuf, writebuf, memaddr, reg_len,
1564 /* Make sure the cache gets updated no matter what - if we are writing
1565 to the stack. Even if this write is not tagged as such, we still need
1566 to update the cache. */
1568 if (res == TARGET_XFER_OK
1571 && target_dcache_init_p ()
1572 && !region->attrib.cache
1573 && ((stack_cache_enabled_p () && object != TARGET_OBJECT_STACK_MEMORY)
1574 || (code_cache_enabled_p () && object != TARGET_OBJECT_CODE_MEMORY)))
1576 DCACHE *dcache = target_dcache_get ();
1578 dcache_update (dcache, memaddr, (void *) writebuf, reg_len);
1581 /* If we still haven't got anything, return the last error. We
1586 /* Perform a partial memory transfer. For docs see target.h,
1589 static enum target_xfer_status
1590 memory_xfer_partial (struct target_ops *ops, enum target_object object,
1591 gdb_byte *readbuf, const gdb_byte *writebuf,
1592 ULONGEST memaddr, ULONGEST len, ULONGEST *xfered_len)
1594 enum target_xfer_status res;
1596 /* Zero length requests are ok and require no work. */
1598 return TARGET_XFER_EOF;
1600 /* Fill in READBUF with breakpoint shadows, or WRITEBUF with
1601 breakpoint insns, thus hiding out from higher layers whether
1602 there are software breakpoints inserted in the code stream. */
1603 if (readbuf != NULL)
1605 res = memory_xfer_partial_1 (ops, object, readbuf, NULL, memaddr, len,
1608 if (res == TARGET_XFER_OK && !show_memory_breakpoints)
1609 breakpoint_xfer_memory (readbuf, NULL, NULL, memaddr, res);
1614 struct cleanup *old_chain;
1616 /* A large write request is likely to be partially satisfied
1617 by memory_xfer_partial_1. We will continually malloc
1618 and free a copy of the entire write request for breakpoint
1619 shadow handling even though we only end up writing a small
1620 subset of it. Cap writes to 4KB to mitigate this. */
1621 len = min (4096, len);
1623 buf = xmalloc (len);
1624 old_chain = make_cleanup (xfree, buf);
1625 memcpy (buf, writebuf, len);
1627 breakpoint_xfer_memory (NULL, buf, writebuf, memaddr, len);
1628 res = memory_xfer_partial_1 (ops, object, NULL, buf, memaddr, len,
1631 do_cleanups (old_chain);
1638 restore_show_memory_breakpoints (void *arg)
1640 show_memory_breakpoints = (uintptr_t) arg;
1644 make_show_memory_breakpoints_cleanup (int show)
1646 int current = show_memory_breakpoints;
1648 show_memory_breakpoints = show;
1649 return make_cleanup (restore_show_memory_breakpoints,
1650 (void *) (uintptr_t) current);
1653 /* For docs see target.h, to_xfer_partial. */
1655 enum target_xfer_status
1656 target_xfer_partial (struct target_ops *ops,
1657 enum target_object object, const char *annex,
1658 gdb_byte *readbuf, const gdb_byte *writebuf,
1659 ULONGEST offset, ULONGEST len,
1660 ULONGEST *xfered_len)
1662 enum target_xfer_status retval;
1664 gdb_assert (ops->to_xfer_partial != NULL);
1666 /* Transfer is done when LEN is zero. */
1668 return TARGET_XFER_EOF;
1670 if (writebuf && !may_write_memory)
1671 error (_("Writing to memory is not allowed (addr %s, len %s)"),
1672 core_addr_to_string_nz (offset), plongest (len));
1676 /* If this is a memory transfer, let the memory-specific code
1677 have a look at it instead. Memory transfers are more
1679 if (object == TARGET_OBJECT_MEMORY || object == TARGET_OBJECT_STACK_MEMORY
1680 || object == TARGET_OBJECT_CODE_MEMORY)
1681 retval = memory_xfer_partial (ops, object, readbuf,
1682 writebuf, offset, len, xfered_len);
1683 else if (object == TARGET_OBJECT_RAW_MEMORY)
1685 /* Request the normal memory object from other layers. */
1686 retval = raw_memory_xfer_partial (ops, readbuf, writebuf, offset, len,
1690 retval = ops->to_xfer_partial (ops, object, annex, readbuf,
1691 writebuf, offset, len, xfered_len);
1695 const unsigned char *myaddr = NULL;
1697 fprintf_unfiltered (gdb_stdlog,
1698 "%s:target_xfer_partial "
1699 "(%d, %s, %s, %s, %s, %s) = %d, %s",
1702 (annex ? annex : "(null)"),
1703 host_address_to_string (readbuf),
1704 host_address_to_string (writebuf),
1705 core_addr_to_string_nz (offset),
1706 pulongest (len), retval,
1707 pulongest (*xfered_len));
1713 if (retval == TARGET_XFER_OK && myaddr != NULL)
1717 fputs_unfiltered (", bytes =", gdb_stdlog);
1718 for (i = 0; i < *xfered_len; i++)
1720 if ((((intptr_t) &(myaddr[i])) & 0xf) == 0)
1722 if (targetdebug < 2 && i > 0)
1724 fprintf_unfiltered (gdb_stdlog, " ...");
1727 fprintf_unfiltered (gdb_stdlog, "\n");
1730 fprintf_unfiltered (gdb_stdlog, " %02x", myaddr[i] & 0xff);
1734 fputc_unfiltered ('\n', gdb_stdlog);
1737 /* Check implementations of to_xfer_partial update *XFERED_LEN
1738 properly. Do assertion after printing debug messages, so that we
1739 can find more clues on assertion failure from debugging messages. */
1740 if (retval == TARGET_XFER_OK || retval == TARGET_XFER_E_UNAVAILABLE)
1741 gdb_assert (*xfered_len > 0);
1746 /* Read LEN bytes of target memory at address MEMADDR, placing the
1747 results in GDB's memory at MYADDR. Returns either 0 for success or
1748 TARGET_XFER_E_IO if any error occurs.
1750 If an error occurs, no guarantee is made about the contents of the data at
1751 MYADDR. In particular, the caller should not depend upon partial reads
1752 filling the buffer with good data. There is no way for the caller to know
1753 how much good data might have been transfered anyway. Callers that can
1754 deal with partial reads should call target_read (which will retry until
1755 it makes no progress, and then return how much was transferred). */
1758 target_read_memory (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len)
1760 /* Dispatch to the topmost target, not the flattened current_target.
1761 Memory accesses check target->to_has_(all_)memory, and the
1762 flattened target doesn't inherit those. */
1763 if (target_read (current_target.beneath, TARGET_OBJECT_MEMORY, NULL,
1764 myaddr, memaddr, len) == len)
1767 return TARGET_XFER_E_IO;
1770 /* Like target_read_memory, but specify explicitly that this is a read
1771 from the target's raw memory. That is, this read bypasses the
1772 dcache, breakpoint shadowing, etc. */
1775 target_read_raw_memory (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len)
1777 /* See comment in target_read_memory about why the request starts at
1778 current_target.beneath. */
1779 if (target_read (current_target.beneath, TARGET_OBJECT_RAW_MEMORY, NULL,
1780 myaddr, memaddr, len) == len)
1783 return TARGET_XFER_E_IO;
1786 /* Like target_read_memory, but specify explicitly that this is a read from
1787 the target's stack. This may trigger different cache behavior. */
1790 target_read_stack (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len)
1792 /* See comment in target_read_memory about why the request starts at
1793 current_target.beneath. */
1794 if (target_read (current_target.beneath, TARGET_OBJECT_STACK_MEMORY, NULL,
1795 myaddr, memaddr, len) == len)
1798 return TARGET_XFER_E_IO;
1801 /* Like target_read_memory, but specify explicitly that this is a read from
1802 the target's code. This may trigger different cache behavior. */
1805 target_read_code (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len)
1807 /* See comment in target_read_memory about why the request starts at
1808 current_target.beneath. */
1809 if (target_read (current_target.beneath, TARGET_OBJECT_CODE_MEMORY, NULL,
1810 myaddr, memaddr, len) == len)
1813 return TARGET_XFER_E_IO;
1816 /* Write LEN bytes from MYADDR to target memory at address MEMADDR.
1817 Returns either 0 for success or TARGET_XFER_E_IO if any
1818 error occurs. If an error occurs, no guarantee is made about how
1819 much data got written. Callers that can deal with partial writes
1820 should call target_write. */
1823 target_write_memory (CORE_ADDR memaddr, const gdb_byte *myaddr, ssize_t len)
1825 /* See comment in target_read_memory about why the request starts at
1826 current_target.beneath. */
1827 if (target_write (current_target.beneath, TARGET_OBJECT_MEMORY, NULL,
1828 myaddr, memaddr, len) == len)
1831 return TARGET_XFER_E_IO;
1834 /* Write LEN bytes from MYADDR to target raw memory at address
1835 MEMADDR. Returns either 0 for success or TARGET_XFER_E_IO
1836 if any error occurs. If an error occurs, no guarantee is made
1837 about how much data got written. Callers that can deal with
1838 partial writes should call target_write. */
1841 target_write_raw_memory (CORE_ADDR memaddr, const gdb_byte *myaddr, ssize_t len)
1843 /* See comment in target_read_memory about why the request starts at
1844 current_target.beneath. */
1845 if (target_write (current_target.beneath, TARGET_OBJECT_RAW_MEMORY, NULL,
1846 myaddr, memaddr, len) == len)
1849 return TARGET_XFER_E_IO;
1852 /* Fetch the target's memory map. */
1855 target_memory_map (void)
1857 VEC(mem_region_s) *result;
1858 struct mem_region *last_one, *this_one;
1860 struct target_ops *t;
1863 fprintf_unfiltered (gdb_stdlog, "target_memory_map ()\n");
1865 for (t = current_target.beneath; t != NULL; t = t->beneath)
1866 if (t->to_memory_map != NULL)
1872 result = t->to_memory_map (t);
1876 qsort (VEC_address (mem_region_s, result),
1877 VEC_length (mem_region_s, result),
1878 sizeof (struct mem_region), mem_region_cmp);
1880 /* Check that regions do not overlap. Simultaneously assign
1881 a numbering for the "mem" commands to use to refer to
1884 for (ix = 0; VEC_iterate (mem_region_s, result, ix, this_one); ix++)
1886 this_one->number = ix;
1888 if (last_one && last_one->hi > this_one->lo)
1890 warning (_("Overlapping regions in memory map: ignoring"));
1891 VEC_free (mem_region_s, result);
1894 last_one = this_one;
1901 target_flash_erase (ULONGEST address, LONGEST length)
1903 struct target_ops *t;
1905 for (t = current_target.beneath; t != NULL; t = t->beneath)
1906 if (t->to_flash_erase != NULL)
1909 fprintf_unfiltered (gdb_stdlog, "target_flash_erase (%s, %s)\n",
1910 hex_string (address), phex (length, 0));
1911 t->to_flash_erase (t, address, length);
1919 target_flash_done (void)
1921 struct target_ops *t;
1923 for (t = current_target.beneath; t != NULL; t = t->beneath)
1924 if (t->to_flash_done != NULL)
1927 fprintf_unfiltered (gdb_stdlog, "target_flash_done\n");
1928 t->to_flash_done (t);
1936 show_trust_readonly (struct ui_file *file, int from_tty,
1937 struct cmd_list_element *c, const char *value)
1939 fprintf_filtered (file,
1940 _("Mode for reading from readonly sections is %s.\n"),
1944 /* More generic transfers. */
1946 static enum target_xfer_status
1947 default_xfer_partial (struct target_ops *ops, enum target_object object,
1948 const char *annex, gdb_byte *readbuf,
1949 const gdb_byte *writebuf, ULONGEST offset, ULONGEST len,
1950 ULONGEST *xfered_len)
1952 if (object == TARGET_OBJECT_MEMORY
1953 && ops->deprecated_xfer_memory != NULL)
1954 /* If available, fall back to the target's
1955 "deprecated_xfer_memory" method. */
1960 if (writebuf != NULL)
1962 void *buffer = xmalloc (len);
1963 struct cleanup *cleanup = make_cleanup (xfree, buffer);
1965 memcpy (buffer, writebuf, len);
1966 xfered = ops->deprecated_xfer_memory (offset, buffer, len,
1967 1/*write*/, NULL, ops);
1968 do_cleanups (cleanup);
1970 if (readbuf != NULL)
1971 xfered = ops->deprecated_xfer_memory (offset, readbuf, len,
1972 0/*read*/, NULL, ops);
1975 *xfered_len = (ULONGEST) xfered;
1976 return TARGET_XFER_E_IO;
1978 else if (xfered == 0 && errno == 0)
1979 /* "deprecated_xfer_memory" uses 0, cross checked against
1980 ERRNO as one indication of an error. */
1981 return TARGET_XFER_EOF;
1983 return TARGET_XFER_E_IO;
1987 gdb_assert (ops->beneath != NULL);
1988 return ops->beneath->to_xfer_partial (ops->beneath, object, annex,
1989 readbuf, writebuf, offset, len,
1994 /* Target vector read/write partial wrapper functions. */
1996 static enum target_xfer_status
1997 target_read_partial (struct target_ops *ops,
1998 enum target_object object,
1999 const char *annex, gdb_byte *buf,
2000 ULONGEST offset, ULONGEST len,
2001 ULONGEST *xfered_len)
2003 return target_xfer_partial (ops, object, annex, buf, NULL, offset, len,
2007 static enum target_xfer_status
2008 target_write_partial (struct target_ops *ops,
2009 enum target_object object,
2010 const char *annex, const gdb_byte *buf,
2011 ULONGEST offset, LONGEST len, ULONGEST *xfered_len)
2013 return target_xfer_partial (ops, object, annex, NULL, buf, offset, len,
2017 /* Wrappers to perform the full transfer. */
2019 /* For docs on target_read see target.h. */
2022 target_read (struct target_ops *ops,
2023 enum target_object object,
2024 const char *annex, gdb_byte *buf,
2025 ULONGEST offset, LONGEST len)
2029 while (xfered < len)
2031 ULONGEST xfered_len;
2032 enum target_xfer_status status;
2034 status = target_read_partial (ops, object, annex,
2035 (gdb_byte *) buf + xfered,
2036 offset + xfered, len - xfered,
2039 /* Call an observer, notifying them of the xfer progress? */
2040 if (status == TARGET_XFER_EOF)
2042 else if (status == TARGET_XFER_OK)
2044 xfered += xfered_len;
2054 /* Assuming that the entire [begin, end) range of memory cannot be
2055 read, try to read whatever subrange is possible to read.
2057 The function returns, in RESULT, either zero or one memory block.
2058 If there's a readable subrange at the beginning, it is completely
2059 read and returned. Any further readable subrange will not be read.
2060 Otherwise, if there's a readable subrange at the end, it will be
2061 completely read and returned. Any readable subranges before it
2062 (obviously, not starting at the beginning), will be ignored. In
2063 other cases -- either no readable subrange, or readable subrange(s)
2064 that is neither at the beginning, or end, nothing is returned.
2066 The purpose of this function is to handle a read across a boundary
2067 of accessible memory in a case when memory map is not available.
2068 The above restrictions are fine for this case, but will give
2069 incorrect results if the memory is 'patchy'. However, supporting
2070 'patchy' memory would require trying to read every single byte,
2071 and it seems unacceptable solution. Explicit memory map is
2072 recommended for this case -- and target_read_memory_robust will
2073 take care of reading multiple ranges then. */
2076 read_whatever_is_readable (struct target_ops *ops,
2077 ULONGEST begin, ULONGEST end,
2078 VEC(memory_read_result_s) **result)
2080 gdb_byte *buf = xmalloc (end - begin);
2081 ULONGEST current_begin = begin;
2082 ULONGEST current_end = end;
2084 memory_read_result_s r;
2085 ULONGEST xfered_len;
2087 /* If we previously failed to read 1 byte, nothing can be done here. */
2088 if (end - begin <= 1)
2094 /* Check that either first or the last byte is readable, and give up
2095 if not. This heuristic is meant to permit reading accessible memory
2096 at the boundary of accessible region. */
2097 if (target_read_partial (ops, TARGET_OBJECT_MEMORY, NULL,
2098 buf, begin, 1, &xfered_len) == TARGET_XFER_OK)
2103 else if (target_read_partial (ops, TARGET_OBJECT_MEMORY, NULL,
2104 buf + (end-begin) - 1, end - 1, 1,
2105 &xfered_len) == TARGET_XFER_OK)
2116 /* Loop invariant is that the [current_begin, current_end) was previously
2117 found to be not readable as a whole.
2119 Note loop condition -- if the range has 1 byte, we can't divide the range
2120 so there's no point trying further. */
2121 while (current_end - current_begin > 1)
2123 ULONGEST first_half_begin, first_half_end;
2124 ULONGEST second_half_begin, second_half_end;
2126 ULONGEST middle = current_begin + (current_end - current_begin)/2;
2130 first_half_begin = current_begin;
2131 first_half_end = middle;
2132 second_half_begin = middle;
2133 second_half_end = current_end;
2137 first_half_begin = middle;
2138 first_half_end = current_end;
2139 second_half_begin = current_begin;
2140 second_half_end = middle;
2143 xfer = target_read (ops, TARGET_OBJECT_MEMORY, NULL,
2144 buf + (first_half_begin - begin),
2146 first_half_end - first_half_begin);
2148 if (xfer == first_half_end - first_half_begin)
2150 /* This half reads up fine. So, the error must be in the
2152 current_begin = second_half_begin;
2153 current_end = second_half_end;
2157 /* This half is not readable. Because we've tried one byte, we
2158 know some part of this half if actually redable. Go to the next
2159 iteration to divide again and try to read.
2161 We don't handle the other half, because this function only tries
2162 to read a single readable subrange. */
2163 current_begin = first_half_begin;
2164 current_end = first_half_end;
2170 /* The [begin, current_begin) range has been read. */
2172 r.end = current_begin;
2177 /* The [current_end, end) range has been read. */
2178 LONGEST rlen = end - current_end;
2180 r.data = xmalloc (rlen);
2181 memcpy (r.data, buf + current_end - begin, rlen);
2182 r.begin = current_end;
2186 VEC_safe_push(memory_read_result_s, (*result), &r);
2190 free_memory_read_result_vector (void *x)
2192 VEC(memory_read_result_s) *v = x;
2193 memory_read_result_s *current;
2196 for (ix = 0; VEC_iterate (memory_read_result_s, v, ix, current); ++ix)
2198 xfree (current->data);
2200 VEC_free (memory_read_result_s, v);
2203 VEC(memory_read_result_s) *
2204 read_memory_robust (struct target_ops *ops, ULONGEST offset, LONGEST len)
2206 VEC(memory_read_result_s) *result = 0;
2209 while (xfered < len)
2211 struct mem_region *region = lookup_mem_region (offset + xfered);
2214 /* If there is no explicit region, a fake one should be created. */
2215 gdb_assert (region);
2217 if (region->hi == 0)
2218 rlen = len - xfered;
2220 rlen = region->hi - offset;
2222 if (region->attrib.mode == MEM_NONE || region->attrib.mode == MEM_WO)
2224 /* Cannot read this region. Note that we can end up here only
2225 if the region is explicitly marked inaccessible, or
2226 'inaccessible-by-default' is in effect. */
2231 LONGEST to_read = min (len - xfered, rlen);
2232 gdb_byte *buffer = (gdb_byte *)xmalloc (to_read);
2234 LONGEST xfer = target_read (ops, TARGET_OBJECT_MEMORY, NULL,
2235 (gdb_byte *) buffer,
2236 offset + xfered, to_read);
2237 /* Call an observer, notifying them of the xfer progress? */
2240 /* Got an error reading full chunk. See if maybe we can read
2243 read_whatever_is_readable (ops, offset + xfered,
2244 offset + xfered + to_read, &result);
2249 struct memory_read_result r;
2251 r.begin = offset + xfered;
2252 r.end = r.begin + xfer;
2253 VEC_safe_push (memory_read_result_s, result, &r);
2263 /* An alternative to target_write with progress callbacks. */
2266 target_write_with_progress (struct target_ops *ops,
2267 enum target_object object,
2268 const char *annex, const gdb_byte *buf,
2269 ULONGEST offset, LONGEST len,
2270 void (*progress) (ULONGEST, void *), void *baton)
2274 /* Give the progress callback a chance to set up. */
2276 (*progress) (0, baton);
2278 while (xfered < len)
2280 ULONGEST xfered_len;
2281 enum target_xfer_status status;
2283 status = target_write_partial (ops, object, annex,
2284 (gdb_byte *) buf + xfered,
2285 offset + xfered, len - xfered,
2288 if (status == TARGET_XFER_EOF)
2290 if (TARGET_XFER_STATUS_ERROR_P (status))
2293 gdb_assert (status == TARGET_XFER_OK);
2295 (*progress) (xfered_len, baton);
2297 xfered += xfered_len;
2303 /* For docs on target_write see target.h. */
2306 target_write (struct target_ops *ops,
2307 enum target_object object,
2308 const char *annex, const gdb_byte *buf,
2309 ULONGEST offset, LONGEST len)
2311 return target_write_with_progress (ops, object, annex, buf, offset, len,
2315 /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return
2316 the size of the transferred data. PADDING additional bytes are
2317 available in *BUF_P. This is a helper function for
2318 target_read_alloc; see the declaration of that function for more
2322 target_read_alloc_1 (struct target_ops *ops, enum target_object object,
2323 const char *annex, gdb_byte **buf_p, int padding)
2325 size_t buf_alloc, buf_pos;
2328 /* This function does not have a length parameter; it reads the
2329 entire OBJECT). Also, it doesn't support objects fetched partly
2330 from one target and partly from another (in a different stratum,
2331 e.g. a core file and an executable). Both reasons make it
2332 unsuitable for reading memory. */
2333 gdb_assert (object != TARGET_OBJECT_MEMORY);
2335 /* Start by reading up to 4K at a time. The target will throttle
2336 this number down if necessary. */
2338 buf = xmalloc (buf_alloc);
2342 ULONGEST xfered_len;
2343 enum target_xfer_status status;
2345 status = target_read_partial (ops, object, annex, &buf[buf_pos],
2346 buf_pos, buf_alloc - buf_pos - padding,
2349 if (status == TARGET_XFER_EOF)
2351 /* Read all there was. */
2358 else if (status != TARGET_XFER_OK)
2360 /* An error occurred. */
2362 return TARGET_XFER_E_IO;
2365 buf_pos += xfered_len;
2367 /* If the buffer is filling up, expand it. */
2368 if (buf_alloc < buf_pos * 2)
2371 buf = xrealloc (buf, buf_alloc);
2378 /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return
2379 the size of the transferred data. See the declaration in "target.h"
2380 function for more information about the return value. */
2383 target_read_alloc (struct target_ops *ops, enum target_object object,
2384 const char *annex, gdb_byte **buf_p)
2386 return target_read_alloc_1 (ops, object, annex, buf_p, 0);
2389 /* Read OBJECT/ANNEX using OPS. The result is NUL-terminated and
2390 returned as a string, allocated using xmalloc. If an error occurs
2391 or the transfer is unsupported, NULL is returned. Empty objects
2392 are returned as allocated but empty strings. A warning is issued
2393 if the result contains any embedded NUL bytes. */
2396 target_read_stralloc (struct target_ops *ops, enum target_object object,
2401 LONGEST i, transferred;
2403 transferred = target_read_alloc_1 (ops, object, annex, &buffer, 1);
2404 bufstr = (char *) buffer;
2406 if (transferred < 0)
2409 if (transferred == 0)
2410 return xstrdup ("");
2412 bufstr[transferred] = 0;
2414 /* Check for embedded NUL bytes; but allow trailing NULs. */
2415 for (i = strlen (bufstr); i < transferred; i++)
2418 warning (_("target object %d, annex %s, "
2419 "contained unexpected null characters"),
2420 (int) object, annex ? annex : "(none)");
2427 /* Memory transfer methods. */
2430 get_target_memory (struct target_ops *ops, CORE_ADDR addr, gdb_byte *buf,
2433 /* This method is used to read from an alternate, non-current
2434 target. This read must bypass the overlay support (as symbols
2435 don't match this target), and GDB's internal cache (wrong cache
2436 for this target). */
2437 if (target_read (ops, TARGET_OBJECT_RAW_MEMORY, NULL, buf, addr, len)
2439 memory_error (TARGET_XFER_E_IO, addr);
2443 get_target_memory_unsigned (struct target_ops *ops, CORE_ADDR addr,
2444 int len, enum bfd_endian byte_order)
2446 gdb_byte buf[sizeof (ULONGEST)];
2448 gdb_assert (len <= sizeof (buf));
2449 get_target_memory (ops, addr, buf, len);
2450 return extract_unsigned_integer (buf, len, byte_order);
2456 target_insert_breakpoint (struct gdbarch *gdbarch,
2457 struct bp_target_info *bp_tgt)
2459 if (!may_insert_breakpoints)
2461 warning (_("May not insert breakpoints"));
2465 return current_target.to_insert_breakpoint (¤t_target,
2472 target_remove_breakpoint (struct gdbarch *gdbarch,
2473 struct bp_target_info *bp_tgt)
2475 /* This is kind of a weird case to handle, but the permission might
2476 have been changed after breakpoints were inserted - in which case
2477 we should just take the user literally and assume that any
2478 breakpoints should be left in place. */
2479 if (!may_insert_breakpoints)
2481 warning (_("May not remove breakpoints"));
2485 return current_target.to_remove_breakpoint (¤t_target,
2490 target_info (char *args, int from_tty)
2492 struct target_ops *t;
2493 int has_all_mem = 0;
2495 if (symfile_objfile != NULL)
2496 printf_unfiltered (_("Symbols from \"%s\".\n"),
2497 objfile_name (symfile_objfile));
2499 for (t = target_stack; t != NULL; t = t->beneath)
2501 if (!(*t->to_has_memory) (t))
2504 if ((int) (t->to_stratum) <= (int) dummy_stratum)
2507 printf_unfiltered (_("\tWhile running this, "
2508 "GDB does not access memory from...\n"));
2509 printf_unfiltered ("%s:\n", t->to_longname);
2510 (t->to_files_info) (t);
2511 has_all_mem = (*t->to_has_all_memory) (t);
2515 /* This function is called before any new inferior is created, e.g.
2516 by running a program, attaching, or connecting to a target.
2517 It cleans up any state from previous invocations which might
2518 change between runs. This is a subset of what target_preopen
2519 resets (things which might change between targets). */
2522 target_pre_inferior (int from_tty)
2524 /* Clear out solib state. Otherwise the solib state of the previous
2525 inferior might have survived and is entirely wrong for the new
2526 target. This has been observed on GNU/Linux using glibc 2.3. How
2538 Cannot access memory at address 0xdeadbeef
2541 /* In some OSs, the shared library list is the same/global/shared
2542 across inferiors. If code is shared between processes, so are
2543 memory regions and features. */
2544 if (!gdbarch_has_global_solist (target_gdbarch ()))
2546 no_shared_libraries (NULL, from_tty);
2548 invalidate_target_mem_regions ();
2550 target_clear_description ();
2553 agent_capability_invalidate ();
2556 /* Callback for iterate_over_inferiors. Gets rid of the given
2560 dispose_inferior (struct inferior *inf, void *args)
2562 struct thread_info *thread;
2564 thread = any_thread_of_process (inf->pid);
2567 switch_to_thread (thread->ptid);
2569 /* Core inferiors actually should be detached, not killed. */
2570 if (target_has_execution)
2573 target_detach (NULL, 0);
2579 /* This is to be called by the open routine before it does
2583 target_preopen (int from_tty)
2587 if (have_inferiors ())
2590 || !have_live_inferiors ()
2591 || query (_("A program is being debugged already. Kill it? ")))
2592 iterate_over_inferiors (dispose_inferior, NULL);
2594 error (_("Program not killed."));
2597 /* Calling target_kill may remove the target from the stack. But if
2598 it doesn't (which seems like a win for UDI), remove it now. */
2599 /* Leave the exec target, though. The user may be switching from a
2600 live process to a core of the same program. */
2601 pop_all_targets_above (file_stratum);
2603 target_pre_inferior (from_tty);
2606 /* Detach a target after doing deferred register stores. */
2609 target_detach (const char *args, int from_tty)
2611 struct target_ops* t;
2613 if (gdbarch_has_global_breakpoints (target_gdbarch ()))
2614 /* Don't remove global breakpoints here. They're removed on
2615 disconnection from the target. */
2618 /* If we're in breakpoints-always-inserted mode, have to remove
2619 them before detaching. */
2620 remove_breakpoints_pid (ptid_get_pid (inferior_ptid));
2622 prepare_for_detach ();
2624 current_target.to_detach (¤t_target, args, from_tty);
2626 fprintf_unfiltered (gdb_stdlog, "target_detach (%s, %d)\n",
2631 target_disconnect (char *args, int from_tty)
2633 struct target_ops *t;
2635 /* If we're in breakpoints-always-inserted mode or if breakpoints
2636 are global across processes, we have to remove them before
2638 remove_breakpoints ();
2640 for (t = current_target.beneath; t != NULL; t = t->beneath)
2641 if (t->to_disconnect != NULL)
2644 fprintf_unfiltered (gdb_stdlog, "target_disconnect (%s, %d)\n",
2646 t->to_disconnect (t, args, from_tty);
2654 target_wait (ptid_t ptid, struct target_waitstatus *status, int options)
2656 struct target_ops *t;
2657 ptid_t retval = (current_target.to_wait) (¤t_target, ptid,
2662 char *status_string;
2663 char *options_string;
2665 status_string = target_waitstatus_to_string (status);
2666 options_string = target_options_to_string (options);
2667 fprintf_unfiltered (gdb_stdlog,
2668 "target_wait (%d, status, options={%s})"
2670 ptid_get_pid (ptid), options_string,
2671 ptid_get_pid (retval), status_string);
2672 xfree (status_string);
2673 xfree (options_string);
2680 target_pid_to_str (ptid_t ptid)
2682 struct target_ops *t;
2684 for (t = current_target.beneath; t != NULL; t = t->beneath)
2686 if (t->to_pid_to_str != NULL)
2687 return (*t->to_pid_to_str) (t, ptid);
2690 return normal_pid_to_str (ptid);
2694 target_thread_name (struct thread_info *info)
2696 struct target_ops *t;
2698 for (t = current_target.beneath; t != NULL; t = t->beneath)
2700 if (t->to_thread_name != NULL)
2701 return (*t->to_thread_name) (t, info);
2708 target_resume (ptid_t ptid, int step, enum gdb_signal signal)
2710 struct target_ops *t;
2712 target_dcache_invalidate ();
2714 current_target.to_resume (¤t_target, ptid, step, signal);
2716 fprintf_unfiltered (gdb_stdlog, "target_resume (%d, %s, %s)\n",
2717 ptid_get_pid (ptid),
2718 step ? "step" : "continue",
2719 gdb_signal_to_name (signal));
2721 registers_changed_ptid (ptid);
2722 set_executing (ptid, 1);
2723 set_running (ptid, 1);
2724 clear_inline_frame_state (ptid);
2728 target_pass_signals (int numsigs, unsigned char *pass_signals)
2730 struct target_ops *t;
2732 for (t = current_target.beneath; t != NULL; t = t->beneath)
2734 if (t->to_pass_signals != NULL)
2740 fprintf_unfiltered (gdb_stdlog, "target_pass_signals (%d, {",
2743 for (i = 0; i < numsigs; i++)
2744 if (pass_signals[i])
2745 fprintf_unfiltered (gdb_stdlog, " %s",
2746 gdb_signal_to_name (i));
2748 fprintf_unfiltered (gdb_stdlog, " })\n");
2751 (*t->to_pass_signals) (t, numsigs, pass_signals);
2758 target_program_signals (int numsigs, unsigned char *program_signals)
2760 struct target_ops *t;
2762 for (t = current_target.beneath; t != NULL; t = t->beneath)
2764 if (t->to_program_signals != NULL)
2770 fprintf_unfiltered (gdb_stdlog, "target_program_signals (%d, {",
2773 for (i = 0; i < numsigs; i++)
2774 if (program_signals[i])
2775 fprintf_unfiltered (gdb_stdlog, " %s",
2776 gdb_signal_to_name (i));
2778 fprintf_unfiltered (gdb_stdlog, " })\n");
2781 (*t->to_program_signals) (t, numsigs, program_signals);
2787 /* Look through the list of possible targets for a target that can
2791 target_follow_fork (int follow_child, int detach_fork)
2793 struct target_ops *t;
2795 for (t = current_target.beneath; t != NULL; t = t->beneath)
2797 if (t->to_follow_fork != NULL)
2799 int retval = t->to_follow_fork (t, follow_child, detach_fork);
2802 fprintf_unfiltered (gdb_stdlog,
2803 "target_follow_fork (%d, %d) = %d\n",
2804 follow_child, detach_fork, retval);
2809 /* Some target returned a fork event, but did not know how to follow it. */
2810 internal_error (__FILE__, __LINE__,
2811 _("could not find a target to follow fork"));
2815 target_mourn_inferior (void)
2817 struct target_ops *t;
2819 for (t = current_target.beneath; t != NULL; t = t->beneath)
2821 if (t->to_mourn_inferior != NULL)
2823 t->to_mourn_inferior (t);
2825 fprintf_unfiltered (gdb_stdlog, "target_mourn_inferior ()\n");
2827 /* We no longer need to keep handles on any of the object files.
2828 Make sure to release them to avoid unnecessarily locking any
2829 of them while we're not actually debugging. */
2830 bfd_cache_close_all ();
2836 internal_error (__FILE__, __LINE__,
2837 _("could not find a target to follow mourn inferior"));
2840 /* Look for a target which can describe architectural features, starting
2841 from TARGET. If we find one, return its description. */
2843 const struct target_desc *
2844 target_read_description (struct target_ops *target)
2846 struct target_ops *t;
2848 for (t = target; t != NULL; t = t->beneath)
2849 if (t->to_read_description != NULL)
2851 const struct target_desc *tdesc;
2853 tdesc = t->to_read_description (t);
2861 /* The default implementation of to_search_memory.
2862 This implements a basic search of memory, reading target memory and
2863 performing the search here (as opposed to performing the search in on the
2864 target side with, for example, gdbserver). */
2867 simple_search_memory (struct target_ops *ops,
2868 CORE_ADDR start_addr, ULONGEST search_space_len,
2869 const gdb_byte *pattern, ULONGEST pattern_len,
2870 CORE_ADDR *found_addrp)
2872 /* NOTE: also defined in find.c testcase. */
2873 #define SEARCH_CHUNK_SIZE 16000
2874 const unsigned chunk_size = SEARCH_CHUNK_SIZE;
2875 /* Buffer to hold memory contents for searching. */
2876 gdb_byte *search_buf;
2877 unsigned search_buf_size;
2878 struct cleanup *old_cleanups;
2880 search_buf_size = chunk_size + pattern_len - 1;
2882 /* No point in trying to allocate a buffer larger than the search space. */
2883 if (search_space_len < search_buf_size)
2884 search_buf_size = search_space_len;
2886 search_buf = malloc (search_buf_size);
2887 if (search_buf == NULL)
2888 error (_("Unable to allocate memory to perform the search."));
2889 old_cleanups = make_cleanup (free_current_contents, &search_buf);
2891 /* Prime the search buffer. */
2893 if (target_read (ops, TARGET_OBJECT_MEMORY, NULL,
2894 search_buf, start_addr, search_buf_size) != search_buf_size)
2896 warning (_("Unable to access %s bytes of target "
2897 "memory at %s, halting search."),
2898 pulongest (search_buf_size), hex_string (start_addr));
2899 do_cleanups (old_cleanups);
2903 /* Perform the search.
2905 The loop is kept simple by allocating [N + pattern-length - 1] bytes.
2906 When we've scanned N bytes we copy the trailing bytes to the start and
2907 read in another N bytes. */
2909 while (search_space_len >= pattern_len)
2911 gdb_byte *found_ptr;
2912 unsigned nr_search_bytes = min (search_space_len, search_buf_size);
2914 found_ptr = memmem (search_buf, nr_search_bytes,
2915 pattern, pattern_len);
2917 if (found_ptr != NULL)
2919 CORE_ADDR found_addr = start_addr + (found_ptr - search_buf);
2921 *found_addrp = found_addr;
2922 do_cleanups (old_cleanups);
2926 /* Not found in this chunk, skip to next chunk. */
2928 /* Don't let search_space_len wrap here, it's unsigned. */
2929 if (search_space_len >= chunk_size)
2930 search_space_len -= chunk_size;
2932 search_space_len = 0;
2934 if (search_space_len >= pattern_len)
2936 unsigned keep_len = search_buf_size - chunk_size;
2937 CORE_ADDR read_addr = start_addr + chunk_size + keep_len;
2940 /* Copy the trailing part of the previous iteration to the front
2941 of the buffer for the next iteration. */
2942 gdb_assert (keep_len == pattern_len - 1);
2943 memcpy (search_buf, search_buf + chunk_size, keep_len);
2945 nr_to_read = min (search_space_len - keep_len, chunk_size);
2947 if (target_read (ops, TARGET_OBJECT_MEMORY, NULL,
2948 search_buf + keep_len, read_addr,
2949 nr_to_read) != nr_to_read)
2951 warning (_("Unable to access %s bytes of target "
2952 "memory at %s, halting search."),
2953 plongest (nr_to_read),
2954 hex_string (read_addr));
2955 do_cleanups (old_cleanups);
2959 start_addr += chunk_size;
2965 do_cleanups (old_cleanups);
2969 /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the
2970 sequence of bytes in PATTERN with length PATTERN_LEN.
2972 The result is 1 if found, 0 if not found, and -1 if there was an error
2973 requiring halting of the search (e.g. memory read error).
2974 If the pattern is found the address is recorded in FOUND_ADDRP. */
2977 target_search_memory (CORE_ADDR start_addr, ULONGEST search_space_len,
2978 const gdb_byte *pattern, ULONGEST pattern_len,
2979 CORE_ADDR *found_addrp)
2981 struct target_ops *t;
2984 /* We don't use INHERIT to set current_target.to_search_memory,
2985 so we have to scan the target stack and handle targetdebug
2989 fprintf_unfiltered (gdb_stdlog, "target_search_memory (%s, ...)\n",
2990 hex_string (start_addr));
2992 for (t = current_target.beneath; t != NULL; t = t->beneath)
2993 if (t->to_search_memory != NULL)
2998 found = t->to_search_memory (t, start_addr, search_space_len,
2999 pattern, pattern_len, found_addrp);
3003 /* If a special version of to_search_memory isn't available, use the
3005 found = simple_search_memory (current_target.beneath,
3006 start_addr, search_space_len,
3007 pattern, pattern_len, found_addrp);
3011 fprintf_unfiltered (gdb_stdlog, " = %d\n", found);
3016 /* Look through the currently pushed targets. If none of them will
3017 be able to restart the currently running process, issue an error
3021 target_require_runnable (void)
3023 struct target_ops *t;
3025 for (t = target_stack; t != NULL; t = t->beneath)
3027 /* If this target knows how to create a new program, then
3028 assume we will still be able to after killing the current
3029 one. Either killing and mourning will not pop T, or else
3030 find_default_run_target will find it again. */
3031 if (t->to_create_inferior != NULL)
3034 /* Do not worry about thread_stratum targets that can not
3035 create inferiors. Assume they will be pushed again if
3036 necessary, and continue to the process_stratum. */
3037 if (t->to_stratum == thread_stratum
3038 || t->to_stratum == arch_stratum)
3041 error (_("The \"%s\" target does not support \"run\". "
3042 "Try \"help target\" or \"continue\"."),
3046 /* This function is only called if the target is running. In that
3047 case there should have been a process_stratum target and it
3048 should either know how to create inferiors, or not... */
3049 internal_error (__FILE__, __LINE__, _("No targets found"));
3052 /* Look through the list of possible targets for a target that can
3053 execute a run or attach command without any other data. This is
3054 used to locate the default process stratum.
3056 If DO_MESG is not NULL, the result is always valid (error() is
3057 called for errors); else, return NULL on error. */
3059 static struct target_ops *
3060 find_default_run_target (char *do_mesg)
3062 struct target_ops **t;
3063 struct target_ops *runable = NULL;
3068 for (t = target_structs; t < target_structs + target_struct_size;
3071 if ((*t)->to_can_run && target_can_run (*t))
3081 error (_("Don't know how to %s. Try \"help target\"."), do_mesg);
3090 find_default_attach (struct target_ops *ops, char *args, int from_tty)
3092 struct target_ops *t;
3094 t = find_default_run_target ("attach");
3095 (t->to_attach) (t, args, from_tty);
3100 find_default_create_inferior (struct target_ops *ops,
3101 char *exec_file, char *allargs, char **env,
3104 struct target_ops *t;
3106 t = find_default_run_target ("run");
3107 (t->to_create_inferior) (t, exec_file, allargs, env, from_tty);
3112 find_default_can_async_p (struct target_ops *ignore)
3114 struct target_ops *t;
3116 /* This may be called before the target is pushed on the stack;
3117 look for the default process stratum. If there's none, gdb isn't
3118 configured with a native debugger, and target remote isn't
3120 t = find_default_run_target (NULL);
3121 if (t && t->to_can_async_p != delegate_can_async_p)
3122 return (t->to_can_async_p) (t);
3127 find_default_is_async_p (struct target_ops *ignore)
3129 struct target_ops *t;
3131 /* This may be called before the target is pushed on the stack;
3132 look for the default process stratum. If there's none, gdb isn't
3133 configured with a native debugger, and target remote isn't
3135 t = find_default_run_target (NULL);
3136 if (t && t->to_is_async_p != delegate_is_async_p)
3137 return (t->to_is_async_p) (t);
3142 find_default_supports_non_stop (struct target_ops *self)
3144 struct target_ops *t;
3146 t = find_default_run_target (NULL);
3147 if (t && t->to_supports_non_stop)
3148 return (t->to_supports_non_stop) (t);
3153 target_supports_non_stop (void)
3155 struct target_ops *t;
3157 for (t = ¤t_target; t != NULL; t = t->beneath)
3158 if (t->to_supports_non_stop)
3159 return t->to_supports_non_stop (t);
3164 /* Implement the "info proc" command. */
3167 target_info_proc (char *args, enum info_proc_what what)
3169 struct target_ops *t;
3171 /* If we're already connected to something that can get us OS
3172 related data, use it. Otherwise, try using the native
3174 if (current_target.to_stratum >= process_stratum)
3175 t = current_target.beneath;
3177 t = find_default_run_target (NULL);
3179 for (; t != NULL; t = t->beneath)
3181 if (t->to_info_proc != NULL)
3183 t->to_info_proc (t, args, what);
3186 fprintf_unfiltered (gdb_stdlog,
3187 "target_info_proc (\"%s\", %d)\n", args, what);
3197 find_default_supports_disable_randomization (struct target_ops *self)
3199 struct target_ops *t;
3201 t = find_default_run_target (NULL);
3202 if (t && t->to_supports_disable_randomization)
3203 return (t->to_supports_disable_randomization) (t);
3208 target_supports_disable_randomization (void)
3210 struct target_ops *t;
3212 for (t = ¤t_target; t != NULL; t = t->beneath)
3213 if (t->to_supports_disable_randomization)
3214 return t->to_supports_disable_randomization (t);
3220 target_get_osdata (const char *type)
3222 struct target_ops *t;
3224 /* If we're already connected to something that can get us OS
3225 related data, use it. Otherwise, try using the native
3227 if (current_target.to_stratum >= process_stratum)
3228 t = current_target.beneath;
3230 t = find_default_run_target ("get OS data");
3235 return target_read_stralloc (t, TARGET_OBJECT_OSDATA, type);
3238 /* Determine the current address space of thread PTID. */
3240 struct address_space *
3241 target_thread_address_space (ptid_t ptid)
3243 struct address_space *aspace;
3244 struct inferior *inf;
3245 struct target_ops *t;
3247 for (t = current_target.beneath; t != NULL; t = t->beneath)
3249 if (t->to_thread_address_space != NULL)
3251 aspace = t->to_thread_address_space (t, ptid);
3252 gdb_assert (aspace);
3255 fprintf_unfiltered (gdb_stdlog,
3256 "target_thread_address_space (%s) = %d\n",
3257 target_pid_to_str (ptid),
3258 address_space_num (aspace));
3263 /* Fall-back to the "main" address space of the inferior. */
3264 inf = find_inferior_pid (ptid_get_pid (ptid));
3266 if (inf == NULL || inf->aspace == NULL)
3267 internal_error (__FILE__, __LINE__,
3268 _("Can't determine the current "
3269 "address space of thread %s\n"),
3270 target_pid_to_str (ptid));
3276 /* Target file operations. */
3278 static struct target_ops *
3279 default_fileio_target (void)
3281 /* If we're already connected to something that can perform
3282 file I/O, use it. Otherwise, try using the native target. */
3283 if (current_target.to_stratum >= process_stratum)
3284 return current_target.beneath;
3286 return find_default_run_target ("file I/O");
3289 /* Open FILENAME on the target, using FLAGS and MODE. Return a
3290 target file descriptor, or -1 if an error occurs (and set
3293 target_fileio_open (const char *filename, int flags, int mode,
3296 struct target_ops *t;
3298 for (t = default_fileio_target (); t != NULL; t = t->beneath)
3300 if (t->to_fileio_open != NULL)
3302 int fd = t->to_fileio_open (t, filename, flags, mode, target_errno);
3305 fprintf_unfiltered (gdb_stdlog,
3306 "target_fileio_open (%s,0x%x,0%o) = %d (%d)\n",
3307 filename, flags, mode,
3308 fd, fd != -1 ? 0 : *target_errno);
3313 *target_errno = FILEIO_ENOSYS;
3317 /* Write up to LEN bytes from WRITE_BUF to FD on the target.
3318 Return the number of bytes written, or -1 if an error occurs
3319 (and set *TARGET_ERRNO). */
3321 target_fileio_pwrite (int fd, const gdb_byte *write_buf, int len,
3322 ULONGEST offset, int *target_errno)
3324 struct target_ops *t;
3326 for (t = default_fileio_target (); t != NULL; t = t->beneath)
3328 if (t->to_fileio_pwrite != NULL)
3330 int ret = t->to_fileio_pwrite (t, fd, write_buf, len, offset,
3334 fprintf_unfiltered (gdb_stdlog,
3335 "target_fileio_pwrite (%d,...,%d,%s) "
3337 fd, len, pulongest (offset),
3338 ret, ret != -1 ? 0 : *target_errno);
3343 *target_errno = FILEIO_ENOSYS;
3347 /* Read up to LEN bytes FD on the target into READ_BUF.
3348 Return the number of bytes read, or -1 if an error occurs
3349 (and set *TARGET_ERRNO). */
3351 target_fileio_pread (int fd, gdb_byte *read_buf, int len,
3352 ULONGEST offset, int *target_errno)
3354 struct target_ops *t;
3356 for (t = default_fileio_target (); t != NULL; t = t->beneath)
3358 if (t->to_fileio_pread != NULL)
3360 int ret = t->to_fileio_pread (t, fd, read_buf, len, offset,
3364 fprintf_unfiltered (gdb_stdlog,
3365 "target_fileio_pread (%d,...,%d,%s) "
3367 fd, len, pulongest (offset),
3368 ret, ret != -1 ? 0 : *target_errno);
3373 *target_errno = FILEIO_ENOSYS;
3377 /* Close FD on the target. Return 0, or -1 if an error occurs
3378 (and set *TARGET_ERRNO). */
3380 target_fileio_close (int fd, int *target_errno)
3382 struct target_ops *t;
3384 for (t = default_fileio_target (); t != NULL; t = t->beneath)
3386 if (t->to_fileio_close != NULL)
3388 int ret = t->to_fileio_close (t, fd, target_errno);
3391 fprintf_unfiltered (gdb_stdlog,
3392 "target_fileio_close (%d) = %d (%d)\n",
3393 fd, ret, ret != -1 ? 0 : *target_errno);
3398 *target_errno = FILEIO_ENOSYS;
3402 /* Unlink FILENAME on the target. Return 0, or -1 if an error
3403 occurs (and set *TARGET_ERRNO). */
3405 target_fileio_unlink (const char *filename, int *target_errno)
3407 struct target_ops *t;
3409 for (t = default_fileio_target (); t != NULL; t = t->beneath)
3411 if (t->to_fileio_unlink != NULL)
3413 int ret = t->to_fileio_unlink (t, filename, target_errno);
3416 fprintf_unfiltered (gdb_stdlog,
3417 "target_fileio_unlink (%s) = %d (%d)\n",
3418 filename, ret, ret != -1 ? 0 : *target_errno);
3423 *target_errno = FILEIO_ENOSYS;
3427 /* Read value of symbolic link FILENAME on the target. Return a
3428 null-terminated string allocated via xmalloc, or NULL if an error
3429 occurs (and set *TARGET_ERRNO). */
3431 target_fileio_readlink (const char *filename, int *target_errno)
3433 struct target_ops *t;
3435 for (t = default_fileio_target (); t != NULL; t = t->beneath)
3437 if (t->to_fileio_readlink != NULL)
3439 char *ret = t->to_fileio_readlink (t, filename, target_errno);
3442 fprintf_unfiltered (gdb_stdlog,
3443 "target_fileio_readlink (%s) = %s (%d)\n",
3444 filename, ret? ret : "(nil)",
3445 ret? 0 : *target_errno);
3450 *target_errno = FILEIO_ENOSYS;
3455 target_fileio_close_cleanup (void *opaque)
3457 int fd = *(int *) opaque;
3460 target_fileio_close (fd, &target_errno);
3463 /* Read target file FILENAME. Store the result in *BUF_P and
3464 return the size of the transferred data. PADDING additional bytes are
3465 available in *BUF_P. This is a helper function for
3466 target_fileio_read_alloc; see the declaration of that function for more
3470 target_fileio_read_alloc_1 (const char *filename,
3471 gdb_byte **buf_p, int padding)
3473 struct cleanup *close_cleanup;
3474 size_t buf_alloc, buf_pos;
3480 fd = target_fileio_open (filename, FILEIO_O_RDONLY, 0700, &target_errno);
3484 close_cleanup = make_cleanup (target_fileio_close_cleanup, &fd);
3486 /* Start by reading up to 4K at a time. The target will throttle
3487 this number down if necessary. */
3489 buf = xmalloc (buf_alloc);
3493 n = target_fileio_pread (fd, &buf[buf_pos],
3494 buf_alloc - buf_pos - padding, buf_pos,
3498 /* An error occurred. */
3499 do_cleanups (close_cleanup);
3505 /* Read all there was. */
3506 do_cleanups (close_cleanup);
3516 /* If the buffer is filling up, expand it. */
3517 if (buf_alloc < buf_pos * 2)
3520 buf = xrealloc (buf, buf_alloc);
3527 /* Read target file FILENAME. Store the result in *BUF_P and return
3528 the size of the transferred data. See the declaration in "target.h"
3529 function for more information about the return value. */
3532 target_fileio_read_alloc (const char *filename, gdb_byte **buf_p)
3534 return target_fileio_read_alloc_1 (filename, buf_p, 0);
3537 /* Read target file FILENAME. The result is NUL-terminated and
3538 returned as a string, allocated using xmalloc. If an error occurs
3539 or the transfer is unsupported, NULL is returned. Empty objects
3540 are returned as allocated but empty strings. A warning is issued
3541 if the result contains any embedded NUL bytes. */
3544 target_fileio_read_stralloc (const char *filename)
3548 LONGEST i, transferred;
3550 transferred = target_fileio_read_alloc_1 (filename, &buffer, 1);
3551 bufstr = (char *) buffer;
3553 if (transferred < 0)
3556 if (transferred == 0)
3557 return xstrdup ("");
3559 bufstr[transferred] = 0;
3561 /* Check for embedded NUL bytes; but allow trailing NULs. */
3562 for (i = strlen (bufstr); i < transferred; i++)
3565 warning (_("target file %s "
3566 "contained unexpected null characters"),
3576 default_region_ok_for_hw_watchpoint (struct target_ops *self,
3577 CORE_ADDR addr, int len)
3579 return (len <= gdbarch_ptr_bit (target_gdbarch ()) / TARGET_CHAR_BIT);
3583 default_watchpoint_addr_within_range (struct target_ops *target,
3585 CORE_ADDR start, int length)
3587 return addr >= start && addr < start + length;
3590 static struct gdbarch *
3591 default_thread_architecture (struct target_ops *ops, ptid_t ptid)
3593 return target_gdbarch ();
3609 return_minus_one (void)
3621 * Find the next target down the stack from the specified target.
3625 find_target_beneath (struct target_ops *t)
3633 find_target_at (enum strata stratum)
3635 struct target_ops *t;
3637 for (t = current_target.beneath; t != NULL; t = t->beneath)
3638 if (t->to_stratum == stratum)
3645 /* The inferior process has died. Long live the inferior! */
3648 generic_mourn_inferior (void)
3652 ptid = inferior_ptid;
3653 inferior_ptid = null_ptid;
3655 /* Mark breakpoints uninserted in case something tries to delete a
3656 breakpoint while we delete the inferior's threads (which would
3657 fail, since the inferior is long gone). */
3658 mark_breakpoints_out ();
3660 if (!ptid_equal (ptid, null_ptid))
3662 int pid = ptid_get_pid (ptid);
3663 exit_inferior (pid);
3666 /* Note this wipes step-resume breakpoints, so needs to be done
3667 after exit_inferior, which ends up referencing the step-resume
3668 breakpoints through clear_thread_inferior_resources. */
3669 breakpoint_init_inferior (inf_exited);
3671 registers_changed ();
3673 reopen_exec_file ();
3674 reinit_frame_cache ();
3676 if (deprecated_detach_hook)
3677 deprecated_detach_hook ();
3680 /* Convert a normal process ID to a string. Returns the string in a
3684 normal_pid_to_str (ptid_t ptid)
3686 static char buf[32];
3688 xsnprintf (buf, sizeof buf, "process %d", ptid_get_pid (ptid));
3693 dummy_pid_to_str (struct target_ops *ops, ptid_t ptid)
3695 return normal_pid_to_str (ptid);
3698 /* Error-catcher for target_find_memory_regions. */
3700 dummy_find_memory_regions (struct target_ops *self,
3701 find_memory_region_ftype ignore1, void *ignore2)
3703 error (_("Command not implemented for this target."));
3707 /* Error-catcher for target_make_corefile_notes. */
3709 dummy_make_corefile_notes (struct target_ops *self,
3710 bfd *ignore1, int *ignore2)
3712 error (_("Command not implemented for this target."));
3716 /* Error-catcher for target_get_bookmark. */
3718 dummy_get_bookmark (struct target_ops *self, char *ignore1, int ignore2)
3724 /* Error-catcher for target_goto_bookmark. */
3726 dummy_goto_bookmark (struct target_ops *self, gdb_byte *ignore, int from_tty)
3731 /* Set up the handful of non-empty slots needed by the dummy target
3735 init_dummy_target (void)
3737 dummy_target.to_shortname = "None";
3738 dummy_target.to_longname = "None";
3739 dummy_target.to_doc = "";
3740 dummy_target.to_create_inferior = find_default_create_inferior;
3741 dummy_target.to_supports_non_stop = find_default_supports_non_stop;
3742 dummy_target.to_supports_disable_randomization
3743 = find_default_supports_disable_randomization;
3744 dummy_target.to_pid_to_str = dummy_pid_to_str;
3745 dummy_target.to_stratum = dummy_stratum;
3746 dummy_target.to_find_memory_regions = dummy_find_memory_regions;
3747 dummy_target.to_make_corefile_notes = dummy_make_corefile_notes;
3748 dummy_target.to_get_bookmark = dummy_get_bookmark;
3749 dummy_target.to_goto_bookmark = dummy_goto_bookmark;
3750 dummy_target.to_has_all_memory = (int (*) (struct target_ops *)) return_zero;
3751 dummy_target.to_has_memory = (int (*) (struct target_ops *)) return_zero;
3752 dummy_target.to_has_stack = (int (*) (struct target_ops *)) return_zero;
3753 dummy_target.to_has_registers = (int (*) (struct target_ops *)) return_zero;
3754 dummy_target.to_has_execution
3755 = (int (*) (struct target_ops *, ptid_t)) return_zero;
3756 dummy_target.to_magic = OPS_MAGIC;
3758 install_dummy_methods (&dummy_target);
3762 debug_to_open (char *args, int from_tty)
3764 debug_target.to_open (args, from_tty);
3766 fprintf_unfiltered (gdb_stdlog, "target_open (%s, %d)\n", args, from_tty);
3770 target_close (struct target_ops *targ)
3772 gdb_assert (!target_is_pushed (targ));
3774 if (targ->to_xclose != NULL)
3775 targ->to_xclose (targ);
3776 else if (targ->to_close != NULL)
3777 targ->to_close (targ);
3780 fprintf_unfiltered (gdb_stdlog, "target_close ()\n");
3784 target_attach (char *args, int from_tty)
3786 current_target.to_attach (¤t_target, args, from_tty);
3788 fprintf_unfiltered (gdb_stdlog, "target_attach (%s, %d)\n",
3793 target_thread_alive (ptid_t ptid)
3795 struct target_ops *t;
3797 for (t = current_target.beneath; t != NULL; t = t->beneath)
3799 if (t->to_thread_alive != NULL)
3803 retval = t->to_thread_alive (t, ptid);
3805 fprintf_unfiltered (gdb_stdlog, "target_thread_alive (%d) = %d\n",
3806 ptid_get_pid (ptid), retval);
3816 target_find_new_threads (void)
3818 struct target_ops *t;
3820 for (t = current_target.beneath; t != NULL; t = t->beneath)
3822 if (t->to_find_new_threads != NULL)
3824 t->to_find_new_threads (t);
3826 fprintf_unfiltered (gdb_stdlog, "target_find_new_threads ()\n");
3834 target_stop (ptid_t ptid)
3838 warning (_("May not interrupt or stop the target, ignoring attempt"));
3842 (*current_target.to_stop) (¤t_target, ptid);
3846 debug_to_post_attach (struct target_ops *self, int pid)
3848 debug_target.to_post_attach (&debug_target, pid);
3850 fprintf_unfiltered (gdb_stdlog, "target_post_attach (%d)\n", pid);
3853 /* Concatenate ELEM to LIST, a comma separate list, and return the
3854 result. The LIST incoming argument is released. */
3857 str_comma_list_concat_elem (char *list, const char *elem)
3860 return xstrdup (elem);
3862 return reconcat (list, list, ", ", elem, (char *) NULL);
3865 /* Helper for target_options_to_string. If OPT is present in
3866 TARGET_OPTIONS, append the OPT_STR (string version of OPT) in RET.
3867 Returns the new resulting string. OPT is removed from
3871 do_option (int *target_options, char *ret,
3872 int opt, char *opt_str)
3874 if ((*target_options & opt) != 0)
3876 ret = str_comma_list_concat_elem (ret, opt_str);
3877 *target_options &= ~opt;
3884 target_options_to_string (int target_options)
3888 #define DO_TARG_OPTION(OPT) \
3889 ret = do_option (&target_options, ret, OPT, #OPT)
3891 DO_TARG_OPTION (TARGET_WNOHANG);
3893 if (target_options != 0)
3894 ret = str_comma_list_concat_elem (ret, "unknown???");
3902 debug_print_register (const char * func,
3903 struct regcache *regcache, int regno)
3905 struct gdbarch *gdbarch = get_regcache_arch (regcache);
3907 fprintf_unfiltered (gdb_stdlog, "%s ", func);
3908 if (regno >= 0 && regno < gdbarch_num_regs (gdbarch)
3909 && gdbarch_register_name (gdbarch, regno) != NULL
3910 && gdbarch_register_name (gdbarch, regno)[0] != '\0')
3911 fprintf_unfiltered (gdb_stdlog, "(%s)",
3912 gdbarch_register_name (gdbarch, regno));
3914 fprintf_unfiltered (gdb_stdlog, "(%d)", regno);
3915 if (regno >= 0 && regno < gdbarch_num_regs (gdbarch))
3917 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
3918 int i, size = register_size (gdbarch, regno);
3919 gdb_byte buf[MAX_REGISTER_SIZE];
3921 regcache_raw_collect (regcache, regno, buf);
3922 fprintf_unfiltered (gdb_stdlog, " = ");
3923 for (i = 0; i < size; i++)
3925 fprintf_unfiltered (gdb_stdlog, "%02x", buf[i]);
3927 if (size <= sizeof (LONGEST))
3929 ULONGEST val = extract_unsigned_integer (buf, size, byte_order);
3931 fprintf_unfiltered (gdb_stdlog, " %s %s",
3932 core_addr_to_string_nz (val), plongest (val));
3935 fprintf_unfiltered (gdb_stdlog, "\n");
3939 target_fetch_registers (struct regcache *regcache, int regno)
3941 struct target_ops *t;
3943 for (t = current_target.beneath; t != NULL; t = t->beneath)
3945 if (t->to_fetch_registers != NULL)
3947 t->to_fetch_registers (t, regcache, regno);
3949 debug_print_register ("target_fetch_registers", regcache, regno);
3956 target_store_registers (struct regcache *regcache, int regno)
3958 struct target_ops *t;
3960 if (!may_write_registers)
3961 error (_("Writing to registers is not allowed (regno %d)"), regno);
3963 current_target.to_store_registers (¤t_target, regcache, regno);
3966 debug_print_register ("target_store_registers", regcache, regno);
3971 target_core_of_thread (ptid_t ptid)
3973 struct target_ops *t;
3975 for (t = current_target.beneath; t != NULL; t = t->beneath)
3977 if (t->to_core_of_thread != NULL)
3979 int retval = t->to_core_of_thread (t, ptid);
3982 fprintf_unfiltered (gdb_stdlog,
3983 "target_core_of_thread (%d) = %d\n",
3984 ptid_get_pid (ptid), retval);
3993 target_verify_memory (const gdb_byte *data, CORE_ADDR memaddr, ULONGEST size)
3995 struct target_ops *t;
3997 for (t = current_target.beneath; t != NULL; t = t->beneath)
3999 if (t->to_verify_memory != NULL)
4001 int retval = t->to_verify_memory (t, data, memaddr, size);
4004 fprintf_unfiltered (gdb_stdlog,
4005 "target_verify_memory (%s, %s) = %d\n",
4006 paddress (target_gdbarch (), memaddr),
4016 /* The documentation for this function is in its prototype declaration in
4020 target_insert_mask_watchpoint (CORE_ADDR addr, CORE_ADDR mask, int rw)
4022 struct target_ops *t;
4024 for (t = current_target.beneath; t != NULL; t = t->beneath)
4025 if (t->to_insert_mask_watchpoint != NULL)
4029 ret = t->to_insert_mask_watchpoint (t, addr, mask, rw);
4032 fprintf_unfiltered (gdb_stdlog, "\
4033 target_insert_mask_watchpoint (%s, %s, %d) = %d\n",
4034 core_addr_to_string (addr),
4035 core_addr_to_string (mask), rw, ret);
4043 /* The documentation for this function is in its prototype declaration in
4047 target_remove_mask_watchpoint (CORE_ADDR addr, CORE_ADDR mask, int rw)
4049 struct target_ops *t;
4051 for (t = current_target.beneath; t != NULL; t = t->beneath)
4052 if (t->to_remove_mask_watchpoint != NULL)
4056 ret = t->to_remove_mask_watchpoint (t, addr, mask, rw);
4059 fprintf_unfiltered (gdb_stdlog, "\
4060 target_remove_mask_watchpoint (%s, %s, %d) = %d\n",
4061 core_addr_to_string (addr),
4062 core_addr_to_string (mask), rw, ret);
4070 /* The documentation for this function is in its prototype declaration
4074 target_masked_watch_num_registers (CORE_ADDR addr, CORE_ADDR mask)
4076 struct target_ops *t;
4078 for (t = current_target.beneath; t != NULL; t = t->beneath)
4079 if (t->to_masked_watch_num_registers != NULL)
4080 return t->to_masked_watch_num_registers (t, addr, mask);
4085 /* The documentation for this function is in its prototype declaration
4089 target_ranged_break_num_registers (void)
4091 struct target_ops *t;
4093 for (t = current_target.beneath; t != NULL; t = t->beneath)
4094 if (t->to_ranged_break_num_registers != NULL)
4095 return t->to_ranged_break_num_registers (t);
4102 struct btrace_target_info *
4103 target_enable_btrace (ptid_t ptid)
4105 struct target_ops *t;
4107 for (t = current_target.beneath; t != NULL; t = t->beneath)
4108 if (t->to_enable_btrace != NULL)
4109 return t->to_enable_btrace (t, ptid);
4118 target_disable_btrace (struct btrace_target_info *btinfo)
4120 struct target_ops *t;
4122 for (t = current_target.beneath; t != NULL; t = t->beneath)
4123 if (t->to_disable_btrace != NULL)
4125 t->to_disable_btrace (t, btinfo);
4135 target_teardown_btrace (struct btrace_target_info *btinfo)
4137 struct target_ops *t;
4139 for (t = current_target.beneath; t != NULL; t = t->beneath)
4140 if (t->to_teardown_btrace != NULL)
4142 t->to_teardown_btrace (t, btinfo);
4152 target_read_btrace (VEC (btrace_block_s) **btrace,
4153 struct btrace_target_info *btinfo,
4154 enum btrace_read_type type)
4156 struct target_ops *t;
4158 for (t = current_target.beneath; t != NULL; t = t->beneath)
4159 if (t->to_read_btrace != NULL)
4160 return t->to_read_btrace (t, btrace, btinfo, type);
4163 return BTRACE_ERR_NOT_SUPPORTED;
4169 target_stop_recording (void)
4171 struct target_ops *t;
4173 for (t = current_target.beneath; t != NULL; t = t->beneath)
4174 if (t->to_stop_recording != NULL)
4176 t->to_stop_recording (t);
4180 /* This is optional. */
4186 target_info_record (void)
4188 struct target_ops *t;
4190 for (t = current_target.beneath; t != NULL; t = t->beneath)
4191 if (t->to_info_record != NULL)
4193 t->to_info_record (t);
4203 target_save_record (const char *filename)
4205 struct target_ops *t;
4207 for (t = current_target.beneath; t != NULL; t = t->beneath)
4208 if (t->to_save_record != NULL)
4210 t->to_save_record (t, filename);
4220 target_supports_delete_record (void)
4222 struct target_ops *t;
4224 for (t = current_target.beneath; t != NULL; t = t->beneath)
4225 if (t->to_delete_record != NULL)
4234 target_delete_record (void)
4236 struct target_ops *t;
4238 for (t = current_target.beneath; t != NULL; t = t->beneath)
4239 if (t->to_delete_record != NULL)
4241 t->to_delete_record (t);
4251 target_record_is_replaying (void)
4253 struct target_ops *t;
4255 for (t = current_target.beneath; t != NULL; t = t->beneath)
4256 if (t->to_record_is_replaying != NULL)
4257 return t->to_record_is_replaying (t);
4265 target_goto_record_begin (void)
4267 struct target_ops *t;
4269 for (t = current_target.beneath; t != NULL; t = t->beneath)
4270 if (t->to_goto_record_begin != NULL)
4272 t->to_goto_record_begin (t);
4282 target_goto_record_end (void)
4284 struct target_ops *t;
4286 for (t = current_target.beneath; t != NULL; t = t->beneath)
4287 if (t->to_goto_record_end != NULL)
4289 t->to_goto_record_end (t);
4299 target_goto_record (ULONGEST insn)
4301 struct target_ops *t;
4303 for (t = current_target.beneath; t != NULL; t = t->beneath)
4304 if (t->to_goto_record != NULL)
4306 t->to_goto_record (t, insn);
4316 target_insn_history (int size, int flags)
4318 struct target_ops *t;
4320 for (t = current_target.beneath; t != NULL; t = t->beneath)
4321 if (t->to_insn_history != NULL)
4323 t->to_insn_history (t, size, flags);
4333 target_insn_history_from (ULONGEST from, int size, int flags)
4335 struct target_ops *t;
4337 for (t = current_target.beneath; t != NULL; t = t->beneath)
4338 if (t->to_insn_history_from != NULL)
4340 t->to_insn_history_from (t, from, size, flags);
4350 target_insn_history_range (ULONGEST begin, ULONGEST end, int flags)
4352 struct target_ops *t;
4354 for (t = current_target.beneath; t != NULL; t = t->beneath)
4355 if (t->to_insn_history_range != NULL)
4357 t->to_insn_history_range (t, begin, end, flags);
4367 target_call_history (int size, int flags)
4369 struct target_ops *t;
4371 for (t = current_target.beneath; t != NULL; t = t->beneath)
4372 if (t->to_call_history != NULL)
4374 t->to_call_history (t, size, flags);
4384 target_call_history_from (ULONGEST begin, int size, int flags)
4386 struct target_ops *t;
4388 for (t = current_target.beneath; t != NULL; t = t->beneath)
4389 if (t->to_call_history_from != NULL)
4391 t->to_call_history_from (t, begin, size, flags);
4401 target_call_history_range (ULONGEST begin, ULONGEST end, int flags)
4403 struct target_ops *t;
4405 for (t = current_target.beneath; t != NULL; t = t->beneath)
4406 if (t->to_call_history_range != NULL)
4408 t->to_call_history_range (t, begin, end, flags);
4416 debug_to_prepare_to_store (struct target_ops *self, struct regcache *regcache)
4418 debug_target.to_prepare_to_store (&debug_target, regcache);
4420 fprintf_unfiltered (gdb_stdlog, "target_prepare_to_store ()\n");
4425 const struct frame_unwind *
4426 target_get_unwinder (void)
4428 struct target_ops *t;
4430 for (t = current_target.beneath; t != NULL; t = t->beneath)
4431 if (t->to_get_unwinder != NULL)
4432 return t->to_get_unwinder;
4439 const struct frame_unwind *
4440 target_get_tailcall_unwinder (void)
4442 struct target_ops *t;
4444 for (t = current_target.beneath; t != NULL; t = t->beneath)
4445 if (t->to_get_tailcall_unwinder != NULL)
4446 return t->to_get_tailcall_unwinder;
4454 forward_target_decr_pc_after_break (struct target_ops *ops,
4455 struct gdbarch *gdbarch)
4457 for (; ops != NULL; ops = ops->beneath)
4458 if (ops->to_decr_pc_after_break != NULL)
4459 return ops->to_decr_pc_after_break (ops, gdbarch);
4461 return gdbarch_decr_pc_after_break (gdbarch);
4467 target_decr_pc_after_break (struct gdbarch *gdbarch)
4469 return forward_target_decr_pc_after_break (current_target.beneath, gdbarch);
4473 deprecated_debug_xfer_memory (CORE_ADDR memaddr, bfd_byte *myaddr, int len,
4474 int write, struct mem_attrib *attrib,
4475 struct target_ops *target)
4479 retval = debug_target.deprecated_xfer_memory (memaddr, myaddr, len, write,
4482 fprintf_unfiltered (gdb_stdlog,
4483 "target_xfer_memory (%s, xxx, %d, %s, xxx) = %d",
4484 paddress (target_gdbarch (), memaddr), len,
4485 write ? "write" : "read", retval);
4491 fputs_unfiltered (", bytes =", gdb_stdlog);
4492 for (i = 0; i < retval; i++)
4494 if ((((intptr_t) &(myaddr[i])) & 0xf) == 0)
4496 if (targetdebug < 2 && i > 0)
4498 fprintf_unfiltered (gdb_stdlog, " ...");
4501 fprintf_unfiltered (gdb_stdlog, "\n");
4504 fprintf_unfiltered (gdb_stdlog, " %02x", myaddr[i] & 0xff);
4508 fputc_unfiltered ('\n', gdb_stdlog);
4514 debug_to_files_info (struct target_ops *target)
4516 debug_target.to_files_info (target);
4518 fprintf_unfiltered (gdb_stdlog, "target_files_info (xxx)\n");
4522 debug_to_insert_breakpoint (struct target_ops *ops, struct gdbarch *gdbarch,
4523 struct bp_target_info *bp_tgt)
4527 retval = debug_target.to_insert_breakpoint (&debug_target, gdbarch, bp_tgt);
4529 fprintf_unfiltered (gdb_stdlog,
4530 "target_insert_breakpoint (%s, xxx) = %ld\n",
4531 core_addr_to_string (bp_tgt->placed_address),
4532 (unsigned long) retval);
4537 debug_to_remove_breakpoint (struct target_ops *ops, struct gdbarch *gdbarch,
4538 struct bp_target_info *bp_tgt)
4542 retval = debug_target.to_remove_breakpoint (&debug_target, gdbarch, bp_tgt);
4544 fprintf_unfiltered (gdb_stdlog,
4545 "target_remove_breakpoint (%s, xxx) = %ld\n",
4546 core_addr_to_string (bp_tgt->placed_address),
4547 (unsigned long) retval);
4552 debug_to_can_use_hw_breakpoint (struct target_ops *self,
4553 int type, int cnt, int from_tty)
4557 retval = debug_target.to_can_use_hw_breakpoint (&debug_target,
4558 type, cnt, from_tty);
4560 fprintf_unfiltered (gdb_stdlog,
4561 "target_can_use_hw_breakpoint (%ld, %ld, %ld) = %ld\n",
4562 (unsigned long) type,
4563 (unsigned long) cnt,
4564 (unsigned long) from_tty,
4565 (unsigned long) retval);
4570 debug_to_region_ok_for_hw_watchpoint (struct target_ops *self,
4571 CORE_ADDR addr, int len)
4575 retval = debug_target.to_region_ok_for_hw_watchpoint (&debug_target,
4578 fprintf_unfiltered (gdb_stdlog,
4579 "target_region_ok_for_hw_watchpoint (%s, %ld) = %s\n",
4580 core_addr_to_string (addr), (unsigned long) len,
4581 core_addr_to_string (retval));
4586 debug_to_can_accel_watchpoint_condition (struct target_ops *self,
4587 CORE_ADDR addr, int len, int rw,
4588 struct expression *cond)
4592 retval = debug_target.to_can_accel_watchpoint_condition (&debug_target,
4596 fprintf_unfiltered (gdb_stdlog,
4597 "target_can_accel_watchpoint_condition "
4598 "(%s, %d, %d, %s) = %ld\n",
4599 core_addr_to_string (addr), len, rw,
4600 host_address_to_string (cond), (unsigned long) retval);
4605 debug_to_stopped_by_watchpoint (struct target_ops *ops)
4609 retval = debug_target.to_stopped_by_watchpoint (&debug_target);
4611 fprintf_unfiltered (gdb_stdlog,
4612 "target_stopped_by_watchpoint () = %ld\n",
4613 (unsigned long) retval);
4618 debug_to_stopped_data_address (struct target_ops *target, CORE_ADDR *addr)
4622 retval = debug_target.to_stopped_data_address (target, addr);
4624 fprintf_unfiltered (gdb_stdlog,
4625 "target_stopped_data_address ([%s]) = %ld\n",
4626 core_addr_to_string (*addr),
4627 (unsigned long)retval);
4632 debug_to_watchpoint_addr_within_range (struct target_ops *target,
4634 CORE_ADDR start, int length)
4638 retval = debug_target.to_watchpoint_addr_within_range (target, addr,
4641 fprintf_filtered (gdb_stdlog,
4642 "target_watchpoint_addr_within_range (%s, %s, %d) = %d\n",
4643 core_addr_to_string (addr), core_addr_to_string (start),
4649 debug_to_insert_hw_breakpoint (struct target_ops *self,
4650 struct gdbarch *gdbarch,
4651 struct bp_target_info *bp_tgt)
4655 retval = debug_target.to_insert_hw_breakpoint (&debug_target,
4658 fprintf_unfiltered (gdb_stdlog,
4659 "target_insert_hw_breakpoint (%s, xxx) = %ld\n",
4660 core_addr_to_string (bp_tgt->placed_address),
4661 (unsigned long) retval);
4666 debug_to_remove_hw_breakpoint (struct target_ops *self,
4667 struct gdbarch *gdbarch,
4668 struct bp_target_info *bp_tgt)
4672 retval = debug_target.to_remove_hw_breakpoint (&debug_target,
4675 fprintf_unfiltered (gdb_stdlog,
4676 "target_remove_hw_breakpoint (%s, xxx) = %ld\n",
4677 core_addr_to_string (bp_tgt->placed_address),
4678 (unsigned long) retval);
4683 debug_to_insert_watchpoint (struct target_ops *self,
4684 CORE_ADDR addr, int len, int type,
4685 struct expression *cond)
4689 retval = debug_target.to_insert_watchpoint (&debug_target,
4690 addr, len, type, cond);
4692 fprintf_unfiltered (gdb_stdlog,
4693 "target_insert_watchpoint (%s, %d, %d, %s) = %ld\n",
4694 core_addr_to_string (addr), len, type,
4695 host_address_to_string (cond), (unsigned long) retval);
4700 debug_to_remove_watchpoint (struct target_ops *self,
4701 CORE_ADDR addr, int len, int type,
4702 struct expression *cond)
4706 retval = debug_target.to_remove_watchpoint (&debug_target,
4707 addr, len, type, cond);
4709 fprintf_unfiltered (gdb_stdlog,
4710 "target_remove_watchpoint (%s, %d, %d, %s) = %ld\n",
4711 core_addr_to_string (addr), len, type,
4712 host_address_to_string (cond), (unsigned long) retval);
4717 debug_to_terminal_init (struct target_ops *self)
4719 debug_target.to_terminal_init (&debug_target);
4721 fprintf_unfiltered (gdb_stdlog, "target_terminal_init ()\n");
4725 debug_to_terminal_inferior (struct target_ops *self)
4727 debug_target.to_terminal_inferior (&debug_target);
4729 fprintf_unfiltered (gdb_stdlog, "target_terminal_inferior ()\n");
4733 debug_to_terminal_ours_for_output (struct target_ops *self)
4735 debug_target.to_terminal_ours_for_output (&debug_target);
4737 fprintf_unfiltered (gdb_stdlog, "target_terminal_ours_for_output ()\n");
4741 debug_to_terminal_ours (struct target_ops *self)
4743 debug_target.to_terminal_ours (&debug_target);
4745 fprintf_unfiltered (gdb_stdlog, "target_terminal_ours ()\n");
4749 debug_to_terminal_save_ours (struct target_ops *self)
4751 debug_target.to_terminal_save_ours (&debug_target);
4753 fprintf_unfiltered (gdb_stdlog, "target_terminal_save_ours ()\n");
4757 debug_to_terminal_info (struct target_ops *self,
4758 const char *arg, int from_tty)
4760 debug_target.to_terminal_info (&debug_target, arg, from_tty);
4762 fprintf_unfiltered (gdb_stdlog, "target_terminal_info (%s, %d)\n", arg,
4767 debug_to_load (struct target_ops *self, char *args, int from_tty)
4769 debug_target.to_load (&debug_target, args, from_tty);
4771 fprintf_unfiltered (gdb_stdlog, "target_load (%s, %d)\n", args, from_tty);
4775 debug_to_post_startup_inferior (struct target_ops *self, ptid_t ptid)
4777 debug_target.to_post_startup_inferior (&debug_target, ptid);
4779 fprintf_unfiltered (gdb_stdlog, "target_post_startup_inferior (%d)\n",
4780 ptid_get_pid (ptid));
4784 debug_to_insert_fork_catchpoint (struct target_ops *self, int pid)
4788 retval = debug_target.to_insert_fork_catchpoint (&debug_target, pid);
4790 fprintf_unfiltered (gdb_stdlog, "target_insert_fork_catchpoint (%d) = %d\n",
4797 debug_to_remove_fork_catchpoint (struct target_ops *self, int pid)
4801 retval = debug_target.to_remove_fork_catchpoint (&debug_target, pid);
4803 fprintf_unfiltered (gdb_stdlog, "target_remove_fork_catchpoint (%d) = %d\n",
4810 debug_to_insert_vfork_catchpoint (struct target_ops *self, int pid)
4814 retval = debug_target.to_insert_vfork_catchpoint (&debug_target, pid);
4816 fprintf_unfiltered (gdb_stdlog, "target_insert_vfork_catchpoint (%d) = %d\n",
4823 debug_to_remove_vfork_catchpoint (struct target_ops *self, int pid)
4827 retval = debug_target.to_remove_vfork_catchpoint (&debug_target, pid);
4829 fprintf_unfiltered (gdb_stdlog, "target_remove_vfork_catchpoint (%d) = %d\n",
4836 debug_to_insert_exec_catchpoint (struct target_ops *self, int pid)
4840 retval = debug_target.to_insert_exec_catchpoint (&debug_target, pid);
4842 fprintf_unfiltered (gdb_stdlog, "target_insert_exec_catchpoint (%d) = %d\n",
4849 debug_to_remove_exec_catchpoint (struct target_ops *self, int pid)
4853 retval = debug_target.to_remove_exec_catchpoint (&debug_target, pid);
4855 fprintf_unfiltered (gdb_stdlog, "target_remove_exec_catchpoint (%d) = %d\n",
4862 debug_to_has_exited (struct target_ops *self,
4863 int pid, int wait_status, int *exit_status)
4867 has_exited = debug_target.to_has_exited (&debug_target,
4868 pid, wait_status, exit_status);
4870 fprintf_unfiltered (gdb_stdlog, "target_has_exited (%d, %d, %d) = %d\n",
4871 pid, wait_status, *exit_status, has_exited);
4877 debug_to_can_run (struct target_ops *self)
4881 retval = debug_target.to_can_run (&debug_target);
4883 fprintf_unfiltered (gdb_stdlog, "target_can_run () = %d\n", retval);
4888 static struct gdbarch *
4889 debug_to_thread_architecture (struct target_ops *ops, ptid_t ptid)
4891 struct gdbarch *retval;
4893 retval = debug_target.to_thread_architecture (ops, ptid);
4895 fprintf_unfiltered (gdb_stdlog,
4896 "target_thread_architecture (%s) = %s [%s]\n",
4897 target_pid_to_str (ptid),
4898 host_address_to_string (retval),
4899 gdbarch_bfd_arch_info (retval)->printable_name);
4904 debug_to_stop (struct target_ops *self, ptid_t ptid)
4906 debug_target.to_stop (&debug_target, ptid);
4908 fprintf_unfiltered (gdb_stdlog, "target_stop (%s)\n",
4909 target_pid_to_str (ptid));
4913 debug_to_rcmd (struct target_ops *self, char *command,
4914 struct ui_file *outbuf)
4916 debug_target.to_rcmd (&debug_target, command, outbuf);
4917 fprintf_unfiltered (gdb_stdlog, "target_rcmd (%s, ...)\n", command);
4921 debug_to_pid_to_exec_file (struct target_ops *self, int pid)
4925 exec_file = debug_target.to_pid_to_exec_file (&debug_target, pid);
4927 fprintf_unfiltered (gdb_stdlog, "target_pid_to_exec_file (%d) = %s\n",
4934 setup_target_debug (void)
4936 memcpy (&debug_target, ¤t_target, sizeof debug_target);
4938 current_target.to_open = debug_to_open;
4939 current_target.to_post_attach = debug_to_post_attach;
4940 current_target.to_prepare_to_store = debug_to_prepare_to_store;
4941 current_target.deprecated_xfer_memory = deprecated_debug_xfer_memory;
4942 current_target.to_files_info = debug_to_files_info;
4943 current_target.to_insert_breakpoint = debug_to_insert_breakpoint;
4944 current_target.to_remove_breakpoint = debug_to_remove_breakpoint;
4945 current_target.to_can_use_hw_breakpoint = debug_to_can_use_hw_breakpoint;
4946 current_target.to_insert_hw_breakpoint = debug_to_insert_hw_breakpoint;
4947 current_target.to_remove_hw_breakpoint = debug_to_remove_hw_breakpoint;
4948 current_target.to_insert_watchpoint = debug_to_insert_watchpoint;
4949 current_target.to_remove_watchpoint = debug_to_remove_watchpoint;
4950 current_target.to_stopped_by_watchpoint = debug_to_stopped_by_watchpoint;
4951 current_target.to_stopped_data_address = debug_to_stopped_data_address;
4952 current_target.to_watchpoint_addr_within_range
4953 = debug_to_watchpoint_addr_within_range;
4954 current_target.to_region_ok_for_hw_watchpoint
4955 = debug_to_region_ok_for_hw_watchpoint;
4956 current_target.to_can_accel_watchpoint_condition
4957 = debug_to_can_accel_watchpoint_condition;
4958 current_target.to_terminal_init = debug_to_terminal_init;
4959 current_target.to_terminal_inferior = debug_to_terminal_inferior;
4960 current_target.to_terminal_ours_for_output
4961 = debug_to_terminal_ours_for_output;
4962 current_target.to_terminal_ours = debug_to_terminal_ours;
4963 current_target.to_terminal_save_ours = debug_to_terminal_save_ours;
4964 current_target.to_terminal_info = debug_to_terminal_info;
4965 current_target.to_load = debug_to_load;
4966 current_target.to_post_startup_inferior = debug_to_post_startup_inferior;
4967 current_target.to_insert_fork_catchpoint = debug_to_insert_fork_catchpoint;
4968 current_target.to_remove_fork_catchpoint = debug_to_remove_fork_catchpoint;
4969 current_target.to_insert_vfork_catchpoint = debug_to_insert_vfork_catchpoint;
4970 current_target.to_remove_vfork_catchpoint = debug_to_remove_vfork_catchpoint;
4971 current_target.to_insert_exec_catchpoint = debug_to_insert_exec_catchpoint;
4972 current_target.to_remove_exec_catchpoint = debug_to_remove_exec_catchpoint;
4973 current_target.to_has_exited = debug_to_has_exited;
4974 current_target.to_can_run = debug_to_can_run;
4975 current_target.to_stop = debug_to_stop;
4976 current_target.to_rcmd = debug_to_rcmd;
4977 current_target.to_pid_to_exec_file = debug_to_pid_to_exec_file;
4978 current_target.to_thread_architecture = debug_to_thread_architecture;
4982 static char targ_desc[] =
4983 "Names of targets and files being debugged.\nShows the entire \
4984 stack of targets currently in use (including the exec-file,\n\
4985 core-file, and process, if any), as well as the symbol file name.";
4988 default_rcmd (struct target_ops *self, char *command, struct ui_file *output)
4990 error (_("\"monitor\" command not supported by this target."));
4994 do_monitor_command (char *cmd,
4997 target_rcmd (cmd, gdb_stdtarg);
5000 /* Print the name of each layers of our target stack. */
5003 maintenance_print_target_stack (char *cmd, int from_tty)
5005 struct target_ops *t;
5007 printf_filtered (_("The current target stack is:\n"));
5009 for (t = target_stack; t != NULL; t = t->beneath)
5011 printf_filtered (" - %s (%s)\n", t->to_shortname, t->to_longname);
5015 /* Controls if async mode is permitted. */
5016 int target_async_permitted = 0;
5018 /* The set command writes to this variable. If the inferior is
5019 executing, target_async_permitted is *not* updated. */
5020 static int target_async_permitted_1 = 0;
5023 set_target_async_command (char *args, int from_tty,
5024 struct cmd_list_element *c)
5026 if (have_live_inferiors ())
5028 target_async_permitted_1 = target_async_permitted;
5029 error (_("Cannot change this setting while the inferior is running."));
5032 target_async_permitted = target_async_permitted_1;
5036 show_target_async_command (struct ui_file *file, int from_tty,
5037 struct cmd_list_element *c,
5040 fprintf_filtered (file,
5041 _("Controlling the inferior in "
5042 "asynchronous mode is %s.\n"), value);
5045 /* Temporary copies of permission settings. */
5047 static int may_write_registers_1 = 1;
5048 static int may_write_memory_1 = 1;
5049 static int may_insert_breakpoints_1 = 1;
5050 static int may_insert_tracepoints_1 = 1;
5051 static int may_insert_fast_tracepoints_1 = 1;
5052 static int may_stop_1 = 1;
5054 /* Make the user-set values match the real values again. */
5057 update_target_permissions (void)
5059 may_write_registers_1 = may_write_registers;
5060 may_write_memory_1 = may_write_memory;
5061 may_insert_breakpoints_1 = may_insert_breakpoints;
5062 may_insert_tracepoints_1 = may_insert_tracepoints;
5063 may_insert_fast_tracepoints_1 = may_insert_fast_tracepoints;
5064 may_stop_1 = may_stop;
5067 /* The one function handles (most of) the permission flags in the same
5071 set_target_permissions (char *args, int from_tty,
5072 struct cmd_list_element *c)
5074 if (target_has_execution)
5076 update_target_permissions ();
5077 error (_("Cannot change this setting while the inferior is running."));
5080 /* Make the real values match the user-changed values. */
5081 may_write_registers = may_write_registers_1;
5082 may_insert_breakpoints = may_insert_breakpoints_1;
5083 may_insert_tracepoints = may_insert_tracepoints_1;
5084 may_insert_fast_tracepoints = may_insert_fast_tracepoints_1;
5085 may_stop = may_stop_1;
5086 update_observer_mode ();
5089 /* Set memory write permission independently of observer mode. */
5092 set_write_memory_permission (char *args, int from_tty,
5093 struct cmd_list_element *c)
5095 /* Make the real values match the user-changed values. */
5096 may_write_memory = may_write_memory_1;
5097 update_observer_mode ();
5102 initialize_targets (void)
5104 init_dummy_target ();
5105 push_target (&dummy_target);
5107 add_info ("target", target_info, targ_desc);
5108 add_info ("files", target_info, targ_desc);
5110 add_setshow_zuinteger_cmd ("target", class_maintenance, &targetdebug, _("\
5111 Set target debugging."), _("\
5112 Show target debugging."), _("\
5113 When non-zero, target debugging is enabled. Higher numbers are more\n\
5114 verbose. Changes do not take effect until the next \"run\" or \"target\"\n\
5118 &setdebuglist, &showdebuglist);
5120 add_setshow_boolean_cmd ("trust-readonly-sections", class_support,
5121 &trust_readonly, _("\
5122 Set mode for reading from readonly sections."), _("\
5123 Show mode for reading from readonly sections."), _("\
5124 When this mode is on, memory reads from readonly sections (such as .text)\n\
5125 will be read from the object file instead of from the target. This will\n\
5126 result in significant performance improvement for remote targets."),
5128 show_trust_readonly,
5129 &setlist, &showlist);
5131 add_com ("monitor", class_obscure, do_monitor_command,
5132 _("Send a command to the remote monitor (remote targets only)."));
5134 add_cmd ("target-stack", class_maintenance, maintenance_print_target_stack,
5135 _("Print the name of each layer of the internal target stack."),
5136 &maintenanceprintlist);
5138 add_setshow_boolean_cmd ("target-async", no_class,
5139 &target_async_permitted_1, _("\
5140 Set whether gdb controls the inferior in asynchronous mode."), _("\
5141 Show whether gdb controls the inferior in asynchronous mode."), _("\
5142 Tells gdb whether to control the inferior in asynchronous mode."),
5143 set_target_async_command,
5144 show_target_async_command,
5148 add_setshow_boolean_cmd ("may-write-registers", class_support,
5149 &may_write_registers_1, _("\
5150 Set permission to write into registers."), _("\
5151 Show permission to write into registers."), _("\
5152 When this permission is on, GDB may write into the target's registers.\n\
5153 Otherwise, any sort of write attempt will result in an error."),
5154 set_target_permissions, NULL,
5155 &setlist, &showlist);
5157 add_setshow_boolean_cmd ("may-write-memory", class_support,
5158 &may_write_memory_1, _("\
5159 Set permission to write into target memory."), _("\
5160 Show permission to write into target memory."), _("\
5161 When this permission is on, GDB may write into the target's memory.\n\
5162 Otherwise, any sort of write attempt will result in an error."),
5163 set_write_memory_permission, NULL,
5164 &setlist, &showlist);
5166 add_setshow_boolean_cmd ("may-insert-breakpoints", class_support,
5167 &may_insert_breakpoints_1, _("\
5168 Set permission to insert breakpoints in the target."), _("\
5169 Show permission to insert breakpoints in the target."), _("\
5170 When this permission is on, GDB may insert breakpoints in the program.\n\
5171 Otherwise, any sort of insertion attempt will result in an error."),
5172 set_target_permissions, NULL,
5173 &setlist, &showlist);
5175 add_setshow_boolean_cmd ("may-insert-tracepoints", class_support,
5176 &may_insert_tracepoints_1, _("\
5177 Set permission to insert tracepoints in the target."), _("\
5178 Show permission to insert tracepoints in the target."), _("\
5179 When this permission is on, GDB may insert tracepoints in the program.\n\
5180 Otherwise, any sort of insertion attempt will result in an error."),
5181 set_target_permissions, NULL,
5182 &setlist, &showlist);
5184 add_setshow_boolean_cmd ("may-insert-fast-tracepoints", class_support,
5185 &may_insert_fast_tracepoints_1, _("\
5186 Set permission to insert fast tracepoints in the target."), _("\
5187 Show permission to insert fast tracepoints in the target."), _("\
5188 When this permission is on, GDB may insert fast tracepoints.\n\
5189 Otherwise, any sort of insertion attempt will result in an error."),
5190 set_target_permissions, NULL,
5191 &setlist, &showlist);
5193 add_setshow_boolean_cmd ("may-interrupt", class_support,
5195 Set permission to interrupt or signal the target."), _("\
5196 Show permission to interrupt or signal the target."), _("\
5197 When this permission is on, GDB may interrupt/stop the target's execution.\n\
5198 Otherwise, any attempt to interrupt or stop will be ignored."),
5199 set_target_permissions, NULL,
5200 &setlist, &showlist);