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 INHERIT (to_terminal_info, t);
629 /* Do not inherit to_kill. */
630 INHERIT (to_load, t);
631 /* Do no inherit to_create_inferior. */
632 INHERIT (to_post_startup_inferior, t);
633 INHERIT (to_insert_fork_catchpoint, t);
634 INHERIT (to_remove_fork_catchpoint, t);
635 INHERIT (to_insert_vfork_catchpoint, t);
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_terminal_info,
738 default_terminal_info);
740 (void (*) (struct target_ops *, char *, int))
742 de_fault (to_post_startup_inferior,
743 (void (*) (struct target_ops *, ptid_t))
745 de_fault (to_insert_fork_catchpoint,
746 (int (*) (struct target_ops *, int))
748 de_fault (to_remove_fork_catchpoint,
749 (int (*) (struct target_ops *, int))
751 de_fault (to_insert_vfork_catchpoint,
752 (int (*) (struct target_ops *, int))
754 de_fault (to_remove_vfork_catchpoint,
755 (int (*) (struct target_ops *, int))
757 de_fault (to_insert_exec_catchpoint,
758 (int (*) (struct target_ops *, int))
760 de_fault (to_remove_exec_catchpoint,
761 (int (*) (struct target_ops *, int))
763 de_fault (to_set_syscall_catchpoint,
764 (int (*) (struct target_ops *, int, int, int, int, int *))
766 de_fault (to_has_exited,
767 (int (*) (struct target_ops *, int, int, int *))
769 de_fault (to_can_run,
770 (int (*) (struct target_ops *))
772 de_fault (to_extra_thread_info,
773 (char *(*) (struct target_ops *, struct thread_info *))
775 de_fault (to_thread_name,
776 (char *(*) (struct target_ops *, struct thread_info *))
779 (void (*) (struct target_ops *, ptid_t))
781 de_fault (to_pid_to_exec_file,
782 (char *(*) (struct target_ops *, int))
784 de_fault (to_thread_architecture,
785 default_thread_architecture);
786 current_target.to_read_description = NULL;
787 de_fault (to_get_ada_task_ptid,
788 (ptid_t (*) (struct target_ops *, long, long))
789 default_get_ada_task_ptid);
790 de_fault (to_supports_multi_process,
791 (int (*) (struct target_ops *))
793 de_fault (to_supports_enable_disable_tracepoint,
794 (int (*) (struct target_ops *))
796 de_fault (to_supports_string_tracing,
797 (int (*) (struct target_ops *))
799 de_fault (to_trace_init,
800 (void (*) (struct target_ops *))
802 de_fault (to_download_tracepoint,
803 (void (*) (struct target_ops *, struct bp_location *))
805 de_fault (to_can_download_tracepoint,
806 (int (*) (struct target_ops *))
808 de_fault (to_download_trace_state_variable,
809 (void (*) (struct target_ops *, struct trace_state_variable *))
811 de_fault (to_enable_tracepoint,
812 (void (*) (struct target_ops *, struct bp_location *))
814 de_fault (to_disable_tracepoint,
815 (void (*) (struct target_ops *, struct bp_location *))
817 de_fault (to_trace_set_readonly_regions,
818 (void (*) (struct target_ops *))
820 de_fault (to_trace_start,
821 (void (*) (struct target_ops *))
823 de_fault (to_get_trace_status,
824 (int (*) (struct target_ops *, struct trace_status *))
826 de_fault (to_get_tracepoint_status,
827 (void (*) (struct target_ops *, struct breakpoint *,
828 struct uploaded_tp *))
830 de_fault (to_trace_stop,
831 (void (*) (struct target_ops *))
833 de_fault (to_trace_find,
834 (int (*) (struct target_ops *,
835 enum trace_find_type, int, CORE_ADDR, CORE_ADDR, int *))
837 de_fault (to_get_trace_state_variable_value,
838 (int (*) (struct target_ops *, int, LONGEST *))
840 de_fault (to_save_trace_data,
841 (int (*) (struct target_ops *, const char *))
843 de_fault (to_upload_tracepoints,
844 (int (*) (struct target_ops *, struct uploaded_tp **))
846 de_fault (to_upload_trace_state_variables,
847 (int (*) (struct target_ops *, struct uploaded_tsv **))
849 de_fault (to_get_raw_trace_data,
850 (LONGEST (*) (struct target_ops *, gdb_byte *, ULONGEST, LONGEST))
852 de_fault (to_get_min_fast_tracepoint_insn_len,
853 (int (*) (struct target_ops *))
855 de_fault (to_set_disconnected_tracing,
856 (void (*) (struct target_ops *, int))
858 de_fault (to_set_circular_trace_buffer,
859 (void (*) (struct target_ops *, int))
861 de_fault (to_set_trace_buffer_size,
862 (void (*) (struct target_ops *, LONGEST))
864 de_fault (to_set_trace_notes,
865 (int (*) (struct target_ops *,
866 const char *, const char *, const char *))
868 de_fault (to_get_tib_address,
869 (int (*) (struct target_ops *, ptid_t, CORE_ADDR *))
871 de_fault (to_set_permissions,
872 (void (*) (struct target_ops *))
874 de_fault (to_static_tracepoint_marker_at,
875 (int (*) (struct target_ops *,
876 CORE_ADDR, struct static_tracepoint_marker *))
878 de_fault (to_static_tracepoint_markers_by_strid,
879 (VEC(static_tracepoint_marker_p) * (*) (struct target_ops *,
882 de_fault (to_traceframe_info,
883 (struct traceframe_info * (*) (struct target_ops *))
885 de_fault (to_supports_evaluation_of_breakpoint_conditions,
886 (int (*) (struct target_ops *))
888 de_fault (to_can_run_breakpoint_commands,
889 (int (*) (struct target_ops *))
891 de_fault (to_use_agent,
892 (int (*) (struct target_ops *, int))
894 de_fault (to_can_use_agent,
895 (int (*) (struct target_ops *))
897 de_fault (to_augmented_libraries_svr4_read,
898 (int (*) (struct target_ops *))
900 de_fault (to_execution_direction, default_execution_direction);
904 /* Finally, position the target-stack beneath the squashed
905 "current_target". That way code looking for a non-inherited
906 target method can quickly and simply find it. */
907 current_target.beneath = target_stack;
910 setup_target_debug ();
913 /* Push a new target type into the stack of the existing target accessors,
914 possibly superseding some of the existing accessors.
916 Rather than allow an empty stack, we always have the dummy target at
917 the bottom stratum, so we can call the function vectors without
921 push_target (struct target_ops *t)
923 struct target_ops **cur;
925 /* Check magic number. If wrong, it probably means someone changed
926 the struct definition, but not all the places that initialize one. */
927 if (t->to_magic != OPS_MAGIC)
929 fprintf_unfiltered (gdb_stderr,
930 "Magic number of %s target struct wrong\n",
932 internal_error (__FILE__, __LINE__,
933 _("failed internal consistency check"));
936 /* Find the proper stratum to install this target in. */
937 for (cur = &target_stack; (*cur) != NULL; cur = &(*cur)->beneath)
939 if ((int) (t->to_stratum) >= (int) (*cur)->to_stratum)
943 /* If there's already targets at this stratum, remove them. */
944 /* FIXME: cagney/2003-10-15: I think this should be popping all
945 targets to CUR, and not just those at this stratum level. */
946 while ((*cur) != NULL && t->to_stratum == (*cur)->to_stratum)
948 /* There's already something at this stratum level. Close it,
949 and un-hook it from the stack. */
950 struct target_ops *tmp = (*cur);
952 (*cur) = (*cur)->beneath;
957 /* We have removed all targets in our stratum, now add the new one. */
961 update_current_target ();
964 /* Remove a target_ops vector from the stack, wherever it may be.
965 Return how many times it was removed (0 or 1). */
968 unpush_target (struct target_ops *t)
970 struct target_ops **cur;
971 struct target_ops *tmp;
973 if (t->to_stratum == dummy_stratum)
974 internal_error (__FILE__, __LINE__,
975 _("Attempt to unpush the dummy target"));
977 /* Look for the specified target. Note that we assume that a target
978 can only occur once in the target stack. */
980 for (cur = &target_stack; (*cur) != NULL; cur = &(*cur)->beneath)
986 /* If we don't find target_ops, quit. Only open targets should be
991 /* Unchain the target. */
993 (*cur) = (*cur)->beneath;
996 update_current_target ();
998 /* Finally close the target. Note we do this after unchaining, so
999 any target method calls from within the target_close
1000 implementation don't end up in T anymore. */
1007 pop_all_targets_above (enum strata above_stratum)
1009 while ((int) (current_target.to_stratum) > (int) above_stratum)
1011 if (!unpush_target (target_stack))
1013 fprintf_unfiltered (gdb_stderr,
1014 "pop_all_targets couldn't find target %s\n",
1015 target_stack->to_shortname);
1016 internal_error (__FILE__, __LINE__,
1017 _("failed internal consistency check"));
1024 pop_all_targets (void)
1026 pop_all_targets_above (dummy_stratum);
1029 /* Return 1 if T is now pushed in the target stack. Return 0 otherwise. */
1032 target_is_pushed (struct target_ops *t)
1034 struct target_ops **cur;
1036 /* Check magic number. If wrong, it probably means someone changed
1037 the struct definition, but not all the places that initialize one. */
1038 if (t->to_magic != OPS_MAGIC)
1040 fprintf_unfiltered (gdb_stderr,
1041 "Magic number of %s target struct wrong\n",
1043 internal_error (__FILE__, __LINE__,
1044 _("failed internal consistency check"));
1047 for (cur = &target_stack; (*cur) != NULL; cur = &(*cur)->beneath)
1054 /* Using the objfile specified in OBJFILE, find the address for the
1055 current thread's thread-local storage with offset OFFSET. */
1057 target_translate_tls_address (struct objfile *objfile, CORE_ADDR offset)
1059 volatile CORE_ADDR addr = 0;
1060 struct target_ops *target;
1062 for (target = current_target.beneath;
1064 target = target->beneath)
1066 if (target->to_get_thread_local_address != NULL)
1071 && gdbarch_fetch_tls_load_module_address_p (target_gdbarch ()))
1073 ptid_t ptid = inferior_ptid;
1074 volatile struct gdb_exception ex;
1076 TRY_CATCH (ex, RETURN_MASK_ALL)
1080 /* Fetch the load module address for this objfile. */
1081 lm_addr = gdbarch_fetch_tls_load_module_address (target_gdbarch (),
1083 /* If it's 0, throw the appropriate exception. */
1085 throw_error (TLS_LOAD_MODULE_NOT_FOUND_ERROR,
1086 _("TLS load module not found"));
1088 addr = target->to_get_thread_local_address (target, ptid,
1091 /* If an error occurred, print TLS related messages here. Otherwise,
1092 throw the error to some higher catcher. */
1095 int objfile_is_library = (objfile->flags & OBJF_SHARED);
1099 case TLS_NO_LIBRARY_SUPPORT_ERROR:
1100 error (_("Cannot find thread-local variables "
1101 "in this thread library."));
1103 case TLS_LOAD_MODULE_NOT_FOUND_ERROR:
1104 if (objfile_is_library)
1105 error (_("Cannot find shared library `%s' in dynamic"
1106 " linker's load module list"), objfile_name (objfile));
1108 error (_("Cannot find executable file `%s' in dynamic"
1109 " linker's load module list"), objfile_name (objfile));
1111 case TLS_NOT_ALLOCATED_YET_ERROR:
1112 if (objfile_is_library)
1113 error (_("The inferior has not yet allocated storage for"
1114 " thread-local variables in\n"
1115 "the shared library `%s'\n"
1117 objfile_name (objfile), target_pid_to_str (ptid));
1119 error (_("The inferior has not yet allocated storage for"
1120 " thread-local variables in\n"
1121 "the executable `%s'\n"
1123 objfile_name (objfile), target_pid_to_str (ptid));
1125 case TLS_GENERIC_ERROR:
1126 if (objfile_is_library)
1127 error (_("Cannot find thread-local storage for %s, "
1128 "shared library %s:\n%s"),
1129 target_pid_to_str (ptid),
1130 objfile_name (objfile), ex.message);
1132 error (_("Cannot find thread-local storage for %s, "
1133 "executable file %s:\n%s"),
1134 target_pid_to_str (ptid),
1135 objfile_name (objfile), ex.message);
1138 throw_exception (ex);
1143 /* It wouldn't be wrong here to try a gdbarch method, too; finding
1144 TLS is an ABI-specific thing. But we don't do that yet. */
1146 error (_("Cannot find thread-local variables on this target"));
1152 target_xfer_status_to_string (enum target_xfer_status err)
1154 #define CASE(X) case X: return #X
1157 CASE(TARGET_XFER_E_IO);
1158 CASE(TARGET_XFER_E_UNAVAILABLE);
1167 #define MIN(A, B) (((A) <= (B)) ? (A) : (B))
1169 /* target_read_string -- read a null terminated string, up to LEN bytes,
1170 from MEMADDR in target. Set *ERRNOP to the errno code, or 0 if successful.
1171 Set *STRING to a pointer to malloc'd memory containing the data; the caller
1172 is responsible for freeing it. Return the number of bytes successfully
1176 target_read_string (CORE_ADDR memaddr, char **string, int len, int *errnop)
1178 int tlen, offset, i;
1182 int buffer_allocated;
1184 unsigned int nbytes_read = 0;
1186 gdb_assert (string);
1188 /* Small for testing. */
1189 buffer_allocated = 4;
1190 buffer = xmalloc (buffer_allocated);
1195 tlen = MIN (len, 4 - (memaddr & 3));
1196 offset = memaddr & 3;
1198 errcode = target_read_memory (memaddr & ~3, buf, sizeof buf);
1201 /* The transfer request might have crossed the boundary to an
1202 unallocated region of memory. Retry the transfer, requesting
1206 errcode = target_read_memory (memaddr, buf, 1);
1211 if (bufptr - buffer + tlen > buffer_allocated)
1215 bytes = bufptr - buffer;
1216 buffer_allocated *= 2;
1217 buffer = xrealloc (buffer, buffer_allocated);
1218 bufptr = buffer + bytes;
1221 for (i = 0; i < tlen; i++)
1223 *bufptr++ = buf[i + offset];
1224 if (buf[i + offset] == '\000')
1226 nbytes_read += i + 1;
1233 nbytes_read += tlen;
1242 struct target_section_table *
1243 target_get_section_table (struct target_ops *target)
1245 struct target_ops *t;
1248 fprintf_unfiltered (gdb_stdlog, "target_get_section_table ()\n");
1250 for (t = target; t != NULL; t = t->beneath)
1251 if (t->to_get_section_table != NULL)
1252 return (*t->to_get_section_table) (t);
1257 /* Find a section containing ADDR. */
1259 struct target_section *
1260 target_section_by_addr (struct target_ops *target, CORE_ADDR addr)
1262 struct target_section_table *table = target_get_section_table (target);
1263 struct target_section *secp;
1268 for (secp = table->sections; secp < table->sections_end; secp++)
1270 if (addr >= secp->addr && addr < secp->endaddr)
1276 /* Read memory from the live target, even if currently inspecting a
1277 traceframe. The return is the same as that of target_read. */
1279 static enum target_xfer_status
1280 target_read_live_memory (enum target_object object,
1281 ULONGEST memaddr, gdb_byte *myaddr, ULONGEST len,
1282 ULONGEST *xfered_len)
1284 enum target_xfer_status ret;
1285 struct cleanup *cleanup;
1287 /* Switch momentarily out of tfind mode so to access live memory.
1288 Note that this must not clear global state, such as the frame
1289 cache, which must still remain valid for the previous traceframe.
1290 We may be _building_ the frame cache at this point. */
1291 cleanup = make_cleanup_restore_traceframe_number ();
1292 set_traceframe_number (-1);
1294 ret = target_xfer_partial (current_target.beneath, object, NULL,
1295 myaddr, NULL, memaddr, len, xfered_len);
1297 do_cleanups (cleanup);
1301 /* Using the set of read-only target sections of OPS, read live
1302 read-only memory. Note that the actual reads start from the
1303 top-most target again.
1305 For interface/parameters/return description see target.h,
1308 static enum target_xfer_status
1309 memory_xfer_live_readonly_partial (struct target_ops *ops,
1310 enum target_object object,
1311 gdb_byte *readbuf, ULONGEST memaddr,
1312 ULONGEST len, ULONGEST *xfered_len)
1314 struct target_section *secp;
1315 struct target_section_table *table;
1317 secp = target_section_by_addr (ops, memaddr);
1319 && (bfd_get_section_flags (secp->the_bfd_section->owner,
1320 secp->the_bfd_section)
1323 struct target_section *p;
1324 ULONGEST memend = memaddr + len;
1326 table = target_get_section_table (ops);
1328 for (p = table->sections; p < table->sections_end; p++)
1330 if (memaddr >= p->addr)
1332 if (memend <= p->endaddr)
1334 /* Entire transfer is within this section. */
1335 return target_read_live_memory (object, memaddr,
1336 readbuf, len, xfered_len);
1338 else if (memaddr >= p->endaddr)
1340 /* This section ends before the transfer starts. */
1345 /* This section overlaps the transfer. Just do half. */
1346 len = p->endaddr - memaddr;
1347 return target_read_live_memory (object, memaddr,
1348 readbuf, len, xfered_len);
1354 return TARGET_XFER_EOF;
1357 /* Read memory from more than one valid target. A core file, for
1358 instance, could have some of memory but delegate other bits to
1359 the target below it. So, we must manually try all targets. */
1361 static enum target_xfer_status
1362 raw_memory_xfer_partial (struct target_ops *ops, gdb_byte *readbuf,
1363 const gdb_byte *writebuf, ULONGEST memaddr, LONGEST len,
1364 ULONGEST *xfered_len)
1366 enum target_xfer_status res;
1370 res = ops->to_xfer_partial (ops, TARGET_OBJECT_MEMORY, NULL,
1371 readbuf, writebuf, memaddr, len,
1373 if (res == TARGET_XFER_OK)
1376 /* Stop if the target reports that the memory is not available. */
1377 if (res == TARGET_XFER_E_UNAVAILABLE)
1380 /* We want to continue past core files to executables, but not
1381 past a running target's memory. */
1382 if (ops->to_has_all_memory (ops))
1387 while (ops != NULL);
1392 /* Perform a partial memory transfer.
1393 For docs see target.h, to_xfer_partial. */
1395 static enum target_xfer_status
1396 memory_xfer_partial_1 (struct target_ops *ops, enum target_object object,
1397 gdb_byte *readbuf, const gdb_byte *writebuf, ULONGEST memaddr,
1398 ULONGEST len, ULONGEST *xfered_len)
1400 enum target_xfer_status res;
1402 struct mem_region *region;
1403 struct inferior *inf;
1405 /* For accesses to unmapped overlay sections, read directly from
1406 files. Must do this first, as MEMADDR may need adjustment. */
1407 if (readbuf != NULL && overlay_debugging)
1409 struct obj_section *section = find_pc_overlay (memaddr);
1411 if (pc_in_unmapped_range (memaddr, section))
1413 struct target_section_table *table
1414 = target_get_section_table (ops);
1415 const char *section_name = section->the_bfd_section->name;
1417 memaddr = overlay_mapped_address (memaddr, section);
1418 return section_table_xfer_memory_partial (readbuf, writebuf,
1419 memaddr, len, xfered_len,
1421 table->sections_end,
1426 /* Try the executable files, if "trust-readonly-sections" is set. */
1427 if (readbuf != NULL && trust_readonly)
1429 struct target_section *secp;
1430 struct target_section_table *table;
1432 secp = target_section_by_addr (ops, memaddr);
1434 && (bfd_get_section_flags (secp->the_bfd_section->owner,
1435 secp->the_bfd_section)
1438 table = target_get_section_table (ops);
1439 return section_table_xfer_memory_partial (readbuf, writebuf,
1440 memaddr, len, xfered_len,
1442 table->sections_end,
1447 /* If reading unavailable memory in the context of traceframes, and
1448 this address falls within a read-only section, fallback to
1449 reading from live memory. */
1450 if (readbuf != NULL && get_traceframe_number () != -1)
1452 VEC(mem_range_s) *available;
1454 /* If we fail to get the set of available memory, then the
1455 target does not support querying traceframe info, and so we
1456 attempt reading from the traceframe anyway (assuming the
1457 target implements the old QTro packet then). */
1458 if (traceframe_available_memory (&available, memaddr, len))
1460 struct cleanup *old_chain;
1462 old_chain = make_cleanup (VEC_cleanup(mem_range_s), &available);
1464 if (VEC_empty (mem_range_s, available)
1465 || VEC_index (mem_range_s, available, 0)->start != memaddr)
1467 /* Don't read into the traceframe's available
1469 if (!VEC_empty (mem_range_s, available))
1471 LONGEST oldlen = len;
1473 len = VEC_index (mem_range_s, available, 0)->start - memaddr;
1474 gdb_assert (len <= oldlen);
1477 do_cleanups (old_chain);
1479 /* This goes through the topmost target again. */
1480 res = memory_xfer_live_readonly_partial (ops, object,
1483 if (res == TARGET_XFER_OK)
1484 return TARGET_XFER_OK;
1487 /* No use trying further, we know some memory starting
1488 at MEMADDR isn't available. */
1490 return TARGET_XFER_E_UNAVAILABLE;
1494 /* Don't try to read more than how much is available, in
1495 case the target implements the deprecated QTro packet to
1496 cater for older GDBs (the target's knowledge of read-only
1497 sections may be outdated by now). */
1498 len = VEC_index (mem_range_s, available, 0)->length;
1500 do_cleanups (old_chain);
1504 /* Try GDB's internal data cache. */
1505 region = lookup_mem_region (memaddr);
1506 /* region->hi == 0 means there's no upper bound. */
1507 if (memaddr + len < region->hi || region->hi == 0)
1510 reg_len = region->hi - memaddr;
1512 switch (region->attrib.mode)
1515 if (writebuf != NULL)
1516 return TARGET_XFER_E_IO;
1520 if (readbuf != NULL)
1521 return TARGET_XFER_E_IO;
1525 /* We only support writing to flash during "load" for now. */
1526 if (writebuf != NULL)
1527 error (_("Writing to flash memory forbidden in this context"));
1531 return TARGET_XFER_E_IO;
1534 if (!ptid_equal (inferior_ptid, null_ptid))
1535 inf = find_inferior_pid (ptid_get_pid (inferior_ptid));
1540 /* The dcache reads whole cache lines; that doesn't play well
1541 with reading from a trace buffer, because reading outside of
1542 the collected memory range fails. */
1543 && get_traceframe_number () == -1
1544 && (region->attrib.cache
1545 || (stack_cache_enabled_p () && object == TARGET_OBJECT_STACK_MEMORY)
1546 || (code_cache_enabled_p () && object == TARGET_OBJECT_CODE_MEMORY)))
1548 DCACHE *dcache = target_dcache_get_or_init ();
1551 if (readbuf != NULL)
1552 l = dcache_xfer_memory (ops, dcache, memaddr, readbuf, reg_len, 0);
1554 /* FIXME drow/2006-08-09: If we're going to preserve const
1555 correctness dcache_xfer_memory should take readbuf and
1557 l = dcache_xfer_memory (ops, dcache, memaddr, (void *) writebuf,
1560 return TARGET_XFER_E_IO;
1563 *xfered_len = (ULONGEST) l;
1564 return TARGET_XFER_OK;
1568 /* If none of those methods found the memory we wanted, fall back
1569 to a target partial transfer. Normally a single call to
1570 to_xfer_partial is enough; if it doesn't recognize an object
1571 it will call the to_xfer_partial of the next target down.
1572 But for memory this won't do. Memory is the only target
1573 object which can be read from more than one valid target.
1574 A core file, for instance, could have some of memory but
1575 delegate other bits to the target below it. So, we must
1576 manually try all targets. */
1578 res = raw_memory_xfer_partial (ops, readbuf, writebuf, memaddr, reg_len,
1581 /* Make sure the cache gets updated no matter what - if we are writing
1582 to the stack. Even if this write is not tagged as such, we still need
1583 to update the cache. */
1585 if (res == TARGET_XFER_OK
1588 && target_dcache_init_p ()
1589 && !region->attrib.cache
1590 && ((stack_cache_enabled_p () && object != TARGET_OBJECT_STACK_MEMORY)
1591 || (code_cache_enabled_p () && object != TARGET_OBJECT_CODE_MEMORY)))
1593 DCACHE *dcache = target_dcache_get ();
1595 dcache_update (dcache, memaddr, (void *) writebuf, reg_len);
1598 /* If we still haven't got anything, return the last error. We
1603 /* Perform a partial memory transfer. For docs see target.h,
1606 static enum target_xfer_status
1607 memory_xfer_partial (struct target_ops *ops, enum target_object object,
1608 gdb_byte *readbuf, const gdb_byte *writebuf,
1609 ULONGEST memaddr, ULONGEST len, ULONGEST *xfered_len)
1611 enum target_xfer_status res;
1613 /* Zero length requests are ok and require no work. */
1615 return TARGET_XFER_EOF;
1617 /* Fill in READBUF with breakpoint shadows, or WRITEBUF with
1618 breakpoint insns, thus hiding out from higher layers whether
1619 there are software breakpoints inserted in the code stream. */
1620 if (readbuf != NULL)
1622 res = memory_xfer_partial_1 (ops, object, readbuf, NULL, memaddr, len,
1625 if (res == TARGET_XFER_OK && !show_memory_breakpoints)
1626 breakpoint_xfer_memory (readbuf, NULL, NULL, memaddr, res);
1631 struct cleanup *old_chain;
1633 /* A large write request is likely to be partially satisfied
1634 by memory_xfer_partial_1. We will continually malloc
1635 and free a copy of the entire write request for breakpoint
1636 shadow handling even though we only end up writing a small
1637 subset of it. Cap writes to 4KB to mitigate this. */
1638 len = min (4096, len);
1640 buf = xmalloc (len);
1641 old_chain = make_cleanup (xfree, buf);
1642 memcpy (buf, writebuf, len);
1644 breakpoint_xfer_memory (NULL, buf, writebuf, memaddr, len);
1645 res = memory_xfer_partial_1 (ops, object, NULL, buf, memaddr, len,
1648 do_cleanups (old_chain);
1655 restore_show_memory_breakpoints (void *arg)
1657 show_memory_breakpoints = (uintptr_t) arg;
1661 make_show_memory_breakpoints_cleanup (int show)
1663 int current = show_memory_breakpoints;
1665 show_memory_breakpoints = show;
1666 return make_cleanup (restore_show_memory_breakpoints,
1667 (void *) (uintptr_t) current);
1670 /* For docs see target.h, to_xfer_partial. */
1672 enum target_xfer_status
1673 target_xfer_partial (struct target_ops *ops,
1674 enum target_object object, const char *annex,
1675 gdb_byte *readbuf, const gdb_byte *writebuf,
1676 ULONGEST offset, ULONGEST len,
1677 ULONGEST *xfered_len)
1679 enum target_xfer_status retval;
1681 gdb_assert (ops->to_xfer_partial != NULL);
1683 /* Transfer is done when LEN is zero. */
1685 return TARGET_XFER_EOF;
1687 if (writebuf && !may_write_memory)
1688 error (_("Writing to memory is not allowed (addr %s, len %s)"),
1689 core_addr_to_string_nz (offset), plongest (len));
1693 /* If this is a memory transfer, let the memory-specific code
1694 have a look at it instead. Memory transfers are more
1696 if (object == TARGET_OBJECT_MEMORY || object == TARGET_OBJECT_STACK_MEMORY
1697 || object == TARGET_OBJECT_CODE_MEMORY)
1698 retval = memory_xfer_partial (ops, object, readbuf,
1699 writebuf, offset, len, xfered_len);
1700 else if (object == TARGET_OBJECT_RAW_MEMORY)
1702 /* Request the normal memory object from other layers. */
1703 retval = raw_memory_xfer_partial (ops, readbuf, writebuf, offset, len,
1707 retval = ops->to_xfer_partial (ops, object, annex, readbuf,
1708 writebuf, offset, len, xfered_len);
1712 const unsigned char *myaddr = NULL;
1714 fprintf_unfiltered (gdb_stdlog,
1715 "%s:target_xfer_partial "
1716 "(%d, %s, %s, %s, %s, %s) = %d, %s",
1719 (annex ? annex : "(null)"),
1720 host_address_to_string (readbuf),
1721 host_address_to_string (writebuf),
1722 core_addr_to_string_nz (offset),
1723 pulongest (len), retval,
1724 pulongest (*xfered_len));
1730 if (retval == TARGET_XFER_OK && myaddr != NULL)
1734 fputs_unfiltered (", bytes =", gdb_stdlog);
1735 for (i = 0; i < *xfered_len; i++)
1737 if ((((intptr_t) &(myaddr[i])) & 0xf) == 0)
1739 if (targetdebug < 2 && i > 0)
1741 fprintf_unfiltered (gdb_stdlog, " ...");
1744 fprintf_unfiltered (gdb_stdlog, "\n");
1747 fprintf_unfiltered (gdb_stdlog, " %02x", myaddr[i] & 0xff);
1751 fputc_unfiltered ('\n', gdb_stdlog);
1754 /* Check implementations of to_xfer_partial update *XFERED_LEN
1755 properly. Do assertion after printing debug messages, so that we
1756 can find more clues on assertion failure from debugging messages. */
1757 if (retval == TARGET_XFER_OK || retval == TARGET_XFER_E_UNAVAILABLE)
1758 gdb_assert (*xfered_len > 0);
1763 /* Read LEN bytes of target memory at address MEMADDR, placing the
1764 results in GDB's memory at MYADDR. Returns either 0 for success or
1765 TARGET_XFER_E_IO if any error occurs.
1767 If an error occurs, no guarantee is made about the contents of the data at
1768 MYADDR. In particular, the caller should not depend upon partial reads
1769 filling the buffer with good data. There is no way for the caller to know
1770 how much good data might have been transfered anyway. Callers that can
1771 deal with partial reads should call target_read (which will retry until
1772 it makes no progress, and then return how much was transferred). */
1775 target_read_memory (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len)
1777 /* Dispatch to the topmost target, not the flattened current_target.
1778 Memory accesses check target->to_has_(all_)memory, and the
1779 flattened target doesn't inherit those. */
1780 if (target_read (current_target.beneath, TARGET_OBJECT_MEMORY, NULL,
1781 myaddr, memaddr, len) == len)
1784 return TARGET_XFER_E_IO;
1787 /* Like target_read_memory, but specify explicitly that this is a read
1788 from the target's raw memory. That is, this read bypasses the
1789 dcache, breakpoint shadowing, etc. */
1792 target_read_raw_memory (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len)
1794 /* See comment in target_read_memory about why the request starts at
1795 current_target.beneath. */
1796 if (target_read (current_target.beneath, TARGET_OBJECT_RAW_MEMORY, NULL,
1797 myaddr, memaddr, len) == len)
1800 return TARGET_XFER_E_IO;
1803 /* Like target_read_memory, but specify explicitly that this is a read from
1804 the target's stack. This may trigger different cache behavior. */
1807 target_read_stack (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len)
1809 /* See comment in target_read_memory about why the request starts at
1810 current_target.beneath. */
1811 if (target_read (current_target.beneath, TARGET_OBJECT_STACK_MEMORY, NULL,
1812 myaddr, memaddr, len) == len)
1815 return TARGET_XFER_E_IO;
1818 /* Like target_read_memory, but specify explicitly that this is a read from
1819 the target's code. This may trigger different cache behavior. */
1822 target_read_code (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len)
1824 /* See comment in target_read_memory about why the request starts at
1825 current_target.beneath. */
1826 if (target_read (current_target.beneath, TARGET_OBJECT_CODE_MEMORY, NULL,
1827 myaddr, memaddr, len) == len)
1830 return TARGET_XFER_E_IO;
1833 /* Write LEN bytes from MYADDR to target memory at address MEMADDR.
1834 Returns either 0 for success or TARGET_XFER_E_IO if any
1835 error occurs. If an error occurs, no guarantee is made about how
1836 much data got written. Callers that can deal with partial writes
1837 should call target_write. */
1840 target_write_memory (CORE_ADDR memaddr, const gdb_byte *myaddr, ssize_t len)
1842 /* See comment in target_read_memory about why the request starts at
1843 current_target.beneath. */
1844 if (target_write (current_target.beneath, TARGET_OBJECT_MEMORY, NULL,
1845 myaddr, memaddr, len) == len)
1848 return TARGET_XFER_E_IO;
1851 /* Write LEN bytes from MYADDR to target raw memory at address
1852 MEMADDR. Returns either 0 for success or TARGET_XFER_E_IO
1853 if any error occurs. If an error occurs, no guarantee is made
1854 about how much data got written. Callers that can deal with
1855 partial writes should call target_write. */
1858 target_write_raw_memory (CORE_ADDR memaddr, const gdb_byte *myaddr, ssize_t len)
1860 /* See comment in target_read_memory about why the request starts at
1861 current_target.beneath. */
1862 if (target_write (current_target.beneath, TARGET_OBJECT_RAW_MEMORY, NULL,
1863 myaddr, memaddr, len) == len)
1866 return TARGET_XFER_E_IO;
1869 /* Fetch the target's memory map. */
1872 target_memory_map (void)
1874 VEC(mem_region_s) *result;
1875 struct mem_region *last_one, *this_one;
1877 struct target_ops *t;
1880 fprintf_unfiltered (gdb_stdlog, "target_memory_map ()\n");
1882 for (t = current_target.beneath; t != NULL; t = t->beneath)
1883 if (t->to_memory_map != NULL)
1889 result = t->to_memory_map (t);
1893 qsort (VEC_address (mem_region_s, result),
1894 VEC_length (mem_region_s, result),
1895 sizeof (struct mem_region), mem_region_cmp);
1897 /* Check that regions do not overlap. Simultaneously assign
1898 a numbering for the "mem" commands to use to refer to
1901 for (ix = 0; VEC_iterate (mem_region_s, result, ix, this_one); ix++)
1903 this_one->number = ix;
1905 if (last_one && last_one->hi > this_one->lo)
1907 warning (_("Overlapping regions in memory map: ignoring"));
1908 VEC_free (mem_region_s, result);
1911 last_one = this_one;
1918 target_flash_erase (ULONGEST address, LONGEST length)
1920 struct target_ops *t;
1922 for (t = current_target.beneath; t != NULL; t = t->beneath)
1923 if (t->to_flash_erase != NULL)
1926 fprintf_unfiltered (gdb_stdlog, "target_flash_erase (%s, %s)\n",
1927 hex_string (address), phex (length, 0));
1928 t->to_flash_erase (t, address, length);
1936 target_flash_done (void)
1938 struct target_ops *t;
1940 for (t = current_target.beneath; t != NULL; t = t->beneath)
1941 if (t->to_flash_done != NULL)
1944 fprintf_unfiltered (gdb_stdlog, "target_flash_done\n");
1945 t->to_flash_done (t);
1953 show_trust_readonly (struct ui_file *file, int from_tty,
1954 struct cmd_list_element *c, const char *value)
1956 fprintf_filtered (file,
1957 _("Mode for reading from readonly sections is %s.\n"),
1961 /* More generic transfers. */
1963 static enum target_xfer_status
1964 default_xfer_partial (struct target_ops *ops, enum target_object object,
1965 const char *annex, gdb_byte *readbuf,
1966 const gdb_byte *writebuf, ULONGEST offset, ULONGEST len,
1967 ULONGEST *xfered_len)
1969 if (object == TARGET_OBJECT_MEMORY
1970 && ops->deprecated_xfer_memory != NULL)
1971 /* If available, fall back to the target's
1972 "deprecated_xfer_memory" method. */
1977 if (writebuf != NULL)
1979 void *buffer = xmalloc (len);
1980 struct cleanup *cleanup = make_cleanup (xfree, buffer);
1982 memcpy (buffer, writebuf, len);
1983 xfered = ops->deprecated_xfer_memory (offset, buffer, len,
1984 1/*write*/, NULL, ops);
1985 do_cleanups (cleanup);
1987 if (readbuf != NULL)
1988 xfered = ops->deprecated_xfer_memory (offset, readbuf, len,
1989 0/*read*/, NULL, ops);
1992 *xfered_len = (ULONGEST) xfered;
1993 return TARGET_XFER_E_IO;
1995 else if (xfered == 0 && errno == 0)
1996 /* "deprecated_xfer_memory" uses 0, cross checked against
1997 ERRNO as one indication of an error. */
1998 return TARGET_XFER_EOF;
2000 return TARGET_XFER_E_IO;
2004 gdb_assert (ops->beneath != NULL);
2005 return ops->beneath->to_xfer_partial (ops->beneath, object, annex,
2006 readbuf, writebuf, offset, len,
2011 /* Target vector read/write partial wrapper functions. */
2013 static enum target_xfer_status
2014 target_read_partial (struct target_ops *ops,
2015 enum target_object object,
2016 const char *annex, gdb_byte *buf,
2017 ULONGEST offset, ULONGEST len,
2018 ULONGEST *xfered_len)
2020 return target_xfer_partial (ops, object, annex, buf, NULL, offset, len,
2024 static enum target_xfer_status
2025 target_write_partial (struct target_ops *ops,
2026 enum target_object object,
2027 const char *annex, const gdb_byte *buf,
2028 ULONGEST offset, LONGEST len, ULONGEST *xfered_len)
2030 return target_xfer_partial (ops, object, annex, NULL, buf, offset, len,
2034 /* Wrappers to perform the full transfer. */
2036 /* For docs on target_read see target.h. */
2039 target_read (struct target_ops *ops,
2040 enum target_object object,
2041 const char *annex, gdb_byte *buf,
2042 ULONGEST offset, LONGEST len)
2046 while (xfered < len)
2048 ULONGEST xfered_len;
2049 enum target_xfer_status status;
2051 status = target_read_partial (ops, object, annex,
2052 (gdb_byte *) buf + xfered,
2053 offset + xfered, len - xfered,
2056 /* Call an observer, notifying them of the xfer progress? */
2057 if (status == TARGET_XFER_EOF)
2059 else if (status == TARGET_XFER_OK)
2061 xfered += xfered_len;
2071 /* Assuming that the entire [begin, end) range of memory cannot be
2072 read, try to read whatever subrange is possible to read.
2074 The function returns, in RESULT, either zero or one memory block.
2075 If there's a readable subrange at the beginning, it is completely
2076 read and returned. Any further readable subrange will not be read.
2077 Otherwise, if there's a readable subrange at the end, it will be
2078 completely read and returned. Any readable subranges before it
2079 (obviously, not starting at the beginning), will be ignored. In
2080 other cases -- either no readable subrange, or readable subrange(s)
2081 that is neither at the beginning, or end, nothing is returned.
2083 The purpose of this function is to handle a read across a boundary
2084 of accessible memory in a case when memory map is not available.
2085 The above restrictions are fine for this case, but will give
2086 incorrect results if the memory is 'patchy'. However, supporting
2087 'patchy' memory would require trying to read every single byte,
2088 and it seems unacceptable solution. Explicit memory map is
2089 recommended for this case -- and target_read_memory_robust will
2090 take care of reading multiple ranges then. */
2093 read_whatever_is_readable (struct target_ops *ops,
2094 ULONGEST begin, ULONGEST end,
2095 VEC(memory_read_result_s) **result)
2097 gdb_byte *buf = xmalloc (end - begin);
2098 ULONGEST current_begin = begin;
2099 ULONGEST current_end = end;
2101 memory_read_result_s r;
2102 ULONGEST xfered_len;
2104 /* If we previously failed to read 1 byte, nothing can be done here. */
2105 if (end - begin <= 1)
2111 /* Check that either first or the last byte is readable, and give up
2112 if not. This heuristic is meant to permit reading accessible memory
2113 at the boundary of accessible region. */
2114 if (target_read_partial (ops, TARGET_OBJECT_MEMORY, NULL,
2115 buf, begin, 1, &xfered_len) == TARGET_XFER_OK)
2120 else if (target_read_partial (ops, TARGET_OBJECT_MEMORY, NULL,
2121 buf + (end-begin) - 1, end - 1, 1,
2122 &xfered_len) == TARGET_XFER_OK)
2133 /* Loop invariant is that the [current_begin, current_end) was previously
2134 found to be not readable as a whole.
2136 Note loop condition -- if the range has 1 byte, we can't divide the range
2137 so there's no point trying further. */
2138 while (current_end - current_begin > 1)
2140 ULONGEST first_half_begin, first_half_end;
2141 ULONGEST second_half_begin, second_half_end;
2143 ULONGEST middle = current_begin + (current_end - current_begin)/2;
2147 first_half_begin = current_begin;
2148 first_half_end = middle;
2149 second_half_begin = middle;
2150 second_half_end = current_end;
2154 first_half_begin = middle;
2155 first_half_end = current_end;
2156 second_half_begin = current_begin;
2157 second_half_end = middle;
2160 xfer = target_read (ops, TARGET_OBJECT_MEMORY, NULL,
2161 buf + (first_half_begin - begin),
2163 first_half_end - first_half_begin);
2165 if (xfer == first_half_end - first_half_begin)
2167 /* This half reads up fine. So, the error must be in the
2169 current_begin = second_half_begin;
2170 current_end = second_half_end;
2174 /* This half is not readable. Because we've tried one byte, we
2175 know some part of this half if actually redable. Go to the next
2176 iteration to divide again and try to read.
2178 We don't handle the other half, because this function only tries
2179 to read a single readable subrange. */
2180 current_begin = first_half_begin;
2181 current_end = first_half_end;
2187 /* The [begin, current_begin) range has been read. */
2189 r.end = current_begin;
2194 /* The [current_end, end) range has been read. */
2195 LONGEST rlen = end - current_end;
2197 r.data = xmalloc (rlen);
2198 memcpy (r.data, buf + current_end - begin, rlen);
2199 r.begin = current_end;
2203 VEC_safe_push(memory_read_result_s, (*result), &r);
2207 free_memory_read_result_vector (void *x)
2209 VEC(memory_read_result_s) *v = x;
2210 memory_read_result_s *current;
2213 for (ix = 0; VEC_iterate (memory_read_result_s, v, ix, current); ++ix)
2215 xfree (current->data);
2217 VEC_free (memory_read_result_s, v);
2220 VEC(memory_read_result_s) *
2221 read_memory_robust (struct target_ops *ops, ULONGEST offset, LONGEST len)
2223 VEC(memory_read_result_s) *result = 0;
2226 while (xfered < len)
2228 struct mem_region *region = lookup_mem_region (offset + xfered);
2231 /* If there is no explicit region, a fake one should be created. */
2232 gdb_assert (region);
2234 if (region->hi == 0)
2235 rlen = len - xfered;
2237 rlen = region->hi - offset;
2239 if (region->attrib.mode == MEM_NONE || region->attrib.mode == MEM_WO)
2241 /* Cannot read this region. Note that we can end up here only
2242 if the region is explicitly marked inaccessible, or
2243 'inaccessible-by-default' is in effect. */
2248 LONGEST to_read = min (len - xfered, rlen);
2249 gdb_byte *buffer = (gdb_byte *)xmalloc (to_read);
2251 LONGEST xfer = target_read (ops, TARGET_OBJECT_MEMORY, NULL,
2252 (gdb_byte *) buffer,
2253 offset + xfered, to_read);
2254 /* Call an observer, notifying them of the xfer progress? */
2257 /* Got an error reading full chunk. See if maybe we can read
2260 read_whatever_is_readable (ops, offset + xfered,
2261 offset + xfered + to_read, &result);
2266 struct memory_read_result r;
2268 r.begin = offset + xfered;
2269 r.end = r.begin + xfer;
2270 VEC_safe_push (memory_read_result_s, result, &r);
2280 /* An alternative to target_write with progress callbacks. */
2283 target_write_with_progress (struct target_ops *ops,
2284 enum target_object object,
2285 const char *annex, const gdb_byte *buf,
2286 ULONGEST offset, LONGEST len,
2287 void (*progress) (ULONGEST, void *), void *baton)
2291 /* Give the progress callback a chance to set up. */
2293 (*progress) (0, baton);
2295 while (xfered < len)
2297 ULONGEST xfered_len;
2298 enum target_xfer_status status;
2300 status = target_write_partial (ops, object, annex,
2301 (gdb_byte *) buf + xfered,
2302 offset + xfered, len - xfered,
2305 if (status == TARGET_XFER_EOF)
2307 if (TARGET_XFER_STATUS_ERROR_P (status))
2310 gdb_assert (status == TARGET_XFER_OK);
2312 (*progress) (xfered_len, baton);
2314 xfered += xfered_len;
2320 /* For docs on target_write see target.h. */
2323 target_write (struct target_ops *ops,
2324 enum target_object object,
2325 const char *annex, const gdb_byte *buf,
2326 ULONGEST offset, LONGEST len)
2328 return target_write_with_progress (ops, object, annex, buf, offset, len,
2332 /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return
2333 the size of the transferred data. PADDING additional bytes are
2334 available in *BUF_P. This is a helper function for
2335 target_read_alloc; see the declaration of that function for more
2339 target_read_alloc_1 (struct target_ops *ops, enum target_object object,
2340 const char *annex, gdb_byte **buf_p, int padding)
2342 size_t buf_alloc, buf_pos;
2345 /* This function does not have a length parameter; it reads the
2346 entire OBJECT). Also, it doesn't support objects fetched partly
2347 from one target and partly from another (in a different stratum,
2348 e.g. a core file and an executable). Both reasons make it
2349 unsuitable for reading memory. */
2350 gdb_assert (object != TARGET_OBJECT_MEMORY);
2352 /* Start by reading up to 4K at a time. The target will throttle
2353 this number down if necessary. */
2355 buf = xmalloc (buf_alloc);
2359 ULONGEST xfered_len;
2360 enum target_xfer_status status;
2362 status = target_read_partial (ops, object, annex, &buf[buf_pos],
2363 buf_pos, buf_alloc - buf_pos - padding,
2366 if (status == TARGET_XFER_EOF)
2368 /* Read all there was. */
2375 else if (status != TARGET_XFER_OK)
2377 /* An error occurred. */
2379 return TARGET_XFER_E_IO;
2382 buf_pos += xfered_len;
2384 /* If the buffer is filling up, expand it. */
2385 if (buf_alloc < buf_pos * 2)
2388 buf = xrealloc (buf, buf_alloc);
2395 /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return
2396 the size of the transferred data. See the declaration in "target.h"
2397 function for more information about the return value. */
2400 target_read_alloc (struct target_ops *ops, enum target_object object,
2401 const char *annex, gdb_byte **buf_p)
2403 return target_read_alloc_1 (ops, object, annex, buf_p, 0);
2406 /* Read OBJECT/ANNEX using OPS. The result is NUL-terminated and
2407 returned as a string, allocated using xmalloc. If an error occurs
2408 or the transfer is unsupported, NULL is returned. Empty objects
2409 are returned as allocated but empty strings. A warning is issued
2410 if the result contains any embedded NUL bytes. */
2413 target_read_stralloc (struct target_ops *ops, enum target_object object,
2418 LONGEST i, transferred;
2420 transferred = target_read_alloc_1 (ops, object, annex, &buffer, 1);
2421 bufstr = (char *) buffer;
2423 if (transferred < 0)
2426 if (transferred == 0)
2427 return xstrdup ("");
2429 bufstr[transferred] = 0;
2431 /* Check for embedded NUL bytes; but allow trailing NULs. */
2432 for (i = strlen (bufstr); i < transferred; i++)
2435 warning (_("target object %d, annex %s, "
2436 "contained unexpected null characters"),
2437 (int) object, annex ? annex : "(none)");
2444 /* Memory transfer methods. */
2447 get_target_memory (struct target_ops *ops, CORE_ADDR addr, gdb_byte *buf,
2450 /* This method is used to read from an alternate, non-current
2451 target. This read must bypass the overlay support (as symbols
2452 don't match this target), and GDB's internal cache (wrong cache
2453 for this target). */
2454 if (target_read (ops, TARGET_OBJECT_RAW_MEMORY, NULL, buf, addr, len)
2456 memory_error (TARGET_XFER_E_IO, addr);
2460 get_target_memory_unsigned (struct target_ops *ops, CORE_ADDR addr,
2461 int len, enum bfd_endian byte_order)
2463 gdb_byte buf[sizeof (ULONGEST)];
2465 gdb_assert (len <= sizeof (buf));
2466 get_target_memory (ops, addr, buf, len);
2467 return extract_unsigned_integer (buf, len, byte_order);
2473 target_insert_breakpoint (struct gdbarch *gdbarch,
2474 struct bp_target_info *bp_tgt)
2476 if (!may_insert_breakpoints)
2478 warning (_("May not insert breakpoints"));
2482 return current_target.to_insert_breakpoint (¤t_target,
2489 target_remove_breakpoint (struct gdbarch *gdbarch,
2490 struct bp_target_info *bp_tgt)
2492 /* This is kind of a weird case to handle, but the permission might
2493 have been changed after breakpoints were inserted - in which case
2494 we should just take the user literally and assume that any
2495 breakpoints should be left in place. */
2496 if (!may_insert_breakpoints)
2498 warning (_("May not remove breakpoints"));
2502 return current_target.to_remove_breakpoint (¤t_target,
2507 target_info (char *args, int from_tty)
2509 struct target_ops *t;
2510 int has_all_mem = 0;
2512 if (symfile_objfile != NULL)
2513 printf_unfiltered (_("Symbols from \"%s\".\n"),
2514 objfile_name (symfile_objfile));
2516 for (t = target_stack; t != NULL; t = t->beneath)
2518 if (!(*t->to_has_memory) (t))
2521 if ((int) (t->to_stratum) <= (int) dummy_stratum)
2524 printf_unfiltered (_("\tWhile running this, "
2525 "GDB does not access memory from...\n"));
2526 printf_unfiltered ("%s:\n", t->to_longname);
2527 (t->to_files_info) (t);
2528 has_all_mem = (*t->to_has_all_memory) (t);
2532 /* This function is called before any new inferior is created, e.g.
2533 by running a program, attaching, or connecting to a target.
2534 It cleans up any state from previous invocations which might
2535 change between runs. This is a subset of what target_preopen
2536 resets (things which might change between targets). */
2539 target_pre_inferior (int from_tty)
2541 /* Clear out solib state. Otherwise the solib state of the previous
2542 inferior might have survived and is entirely wrong for the new
2543 target. This has been observed on GNU/Linux using glibc 2.3. How
2555 Cannot access memory at address 0xdeadbeef
2558 /* In some OSs, the shared library list is the same/global/shared
2559 across inferiors. If code is shared between processes, so are
2560 memory regions and features. */
2561 if (!gdbarch_has_global_solist (target_gdbarch ()))
2563 no_shared_libraries (NULL, from_tty);
2565 invalidate_target_mem_regions ();
2567 target_clear_description ();
2570 agent_capability_invalidate ();
2573 /* Callback for iterate_over_inferiors. Gets rid of the given
2577 dispose_inferior (struct inferior *inf, void *args)
2579 struct thread_info *thread;
2581 thread = any_thread_of_process (inf->pid);
2584 switch_to_thread (thread->ptid);
2586 /* Core inferiors actually should be detached, not killed. */
2587 if (target_has_execution)
2590 target_detach (NULL, 0);
2596 /* This is to be called by the open routine before it does
2600 target_preopen (int from_tty)
2604 if (have_inferiors ())
2607 || !have_live_inferiors ()
2608 || query (_("A program is being debugged already. Kill it? ")))
2609 iterate_over_inferiors (dispose_inferior, NULL);
2611 error (_("Program not killed."));
2614 /* Calling target_kill may remove the target from the stack. But if
2615 it doesn't (which seems like a win for UDI), remove it now. */
2616 /* Leave the exec target, though. The user may be switching from a
2617 live process to a core of the same program. */
2618 pop_all_targets_above (file_stratum);
2620 target_pre_inferior (from_tty);
2623 /* Detach a target after doing deferred register stores. */
2626 target_detach (const char *args, int from_tty)
2628 struct target_ops* t;
2630 if (gdbarch_has_global_breakpoints (target_gdbarch ()))
2631 /* Don't remove global breakpoints here. They're removed on
2632 disconnection from the target. */
2635 /* If we're in breakpoints-always-inserted mode, have to remove
2636 them before detaching. */
2637 remove_breakpoints_pid (ptid_get_pid (inferior_ptid));
2639 prepare_for_detach ();
2641 current_target.to_detach (¤t_target, args, from_tty);
2643 fprintf_unfiltered (gdb_stdlog, "target_detach (%s, %d)\n",
2648 target_disconnect (char *args, int from_tty)
2650 struct target_ops *t;
2652 /* If we're in breakpoints-always-inserted mode or if breakpoints
2653 are global across processes, we have to remove them before
2655 remove_breakpoints ();
2657 for (t = current_target.beneath; t != NULL; t = t->beneath)
2658 if (t->to_disconnect != NULL)
2661 fprintf_unfiltered (gdb_stdlog, "target_disconnect (%s, %d)\n",
2663 t->to_disconnect (t, args, from_tty);
2671 target_wait (ptid_t ptid, struct target_waitstatus *status, int options)
2673 struct target_ops *t;
2674 ptid_t retval = (current_target.to_wait) (¤t_target, ptid,
2679 char *status_string;
2680 char *options_string;
2682 status_string = target_waitstatus_to_string (status);
2683 options_string = target_options_to_string (options);
2684 fprintf_unfiltered (gdb_stdlog,
2685 "target_wait (%d, status, options={%s})"
2687 ptid_get_pid (ptid), options_string,
2688 ptid_get_pid (retval), status_string);
2689 xfree (status_string);
2690 xfree (options_string);
2697 target_pid_to_str (ptid_t ptid)
2699 struct target_ops *t;
2701 for (t = current_target.beneath; t != NULL; t = t->beneath)
2703 if (t->to_pid_to_str != NULL)
2704 return (*t->to_pid_to_str) (t, ptid);
2707 return normal_pid_to_str (ptid);
2711 target_thread_name (struct thread_info *info)
2713 struct target_ops *t;
2715 for (t = current_target.beneath; t != NULL; t = t->beneath)
2717 if (t->to_thread_name != NULL)
2718 return (*t->to_thread_name) (t, info);
2725 target_resume (ptid_t ptid, int step, enum gdb_signal signal)
2727 struct target_ops *t;
2729 target_dcache_invalidate ();
2731 current_target.to_resume (¤t_target, ptid, step, signal);
2733 fprintf_unfiltered (gdb_stdlog, "target_resume (%d, %s, %s)\n",
2734 ptid_get_pid (ptid),
2735 step ? "step" : "continue",
2736 gdb_signal_to_name (signal));
2738 registers_changed_ptid (ptid);
2739 set_executing (ptid, 1);
2740 set_running (ptid, 1);
2741 clear_inline_frame_state (ptid);
2745 target_pass_signals (int numsigs, unsigned char *pass_signals)
2747 struct target_ops *t;
2749 for (t = current_target.beneath; t != NULL; t = t->beneath)
2751 if (t->to_pass_signals != NULL)
2757 fprintf_unfiltered (gdb_stdlog, "target_pass_signals (%d, {",
2760 for (i = 0; i < numsigs; i++)
2761 if (pass_signals[i])
2762 fprintf_unfiltered (gdb_stdlog, " %s",
2763 gdb_signal_to_name (i));
2765 fprintf_unfiltered (gdb_stdlog, " })\n");
2768 (*t->to_pass_signals) (t, numsigs, pass_signals);
2775 target_program_signals (int numsigs, unsigned char *program_signals)
2777 struct target_ops *t;
2779 for (t = current_target.beneath; t != NULL; t = t->beneath)
2781 if (t->to_program_signals != NULL)
2787 fprintf_unfiltered (gdb_stdlog, "target_program_signals (%d, {",
2790 for (i = 0; i < numsigs; i++)
2791 if (program_signals[i])
2792 fprintf_unfiltered (gdb_stdlog, " %s",
2793 gdb_signal_to_name (i));
2795 fprintf_unfiltered (gdb_stdlog, " })\n");
2798 (*t->to_program_signals) (t, numsigs, program_signals);
2804 /* Look through the list of possible targets for a target that can
2808 target_follow_fork (int follow_child, int detach_fork)
2810 struct target_ops *t;
2812 for (t = current_target.beneath; t != NULL; t = t->beneath)
2814 if (t->to_follow_fork != NULL)
2816 int retval = t->to_follow_fork (t, follow_child, detach_fork);
2819 fprintf_unfiltered (gdb_stdlog,
2820 "target_follow_fork (%d, %d) = %d\n",
2821 follow_child, detach_fork, retval);
2826 /* Some target returned a fork event, but did not know how to follow it. */
2827 internal_error (__FILE__, __LINE__,
2828 _("could not find a target to follow fork"));
2832 target_mourn_inferior (void)
2834 struct target_ops *t;
2836 for (t = current_target.beneath; t != NULL; t = t->beneath)
2838 if (t->to_mourn_inferior != NULL)
2840 t->to_mourn_inferior (t);
2842 fprintf_unfiltered (gdb_stdlog, "target_mourn_inferior ()\n");
2844 /* We no longer need to keep handles on any of the object files.
2845 Make sure to release them to avoid unnecessarily locking any
2846 of them while we're not actually debugging. */
2847 bfd_cache_close_all ();
2853 internal_error (__FILE__, __LINE__,
2854 _("could not find a target to follow mourn inferior"));
2857 /* Look for a target which can describe architectural features, starting
2858 from TARGET. If we find one, return its description. */
2860 const struct target_desc *
2861 target_read_description (struct target_ops *target)
2863 struct target_ops *t;
2865 for (t = target; t != NULL; t = t->beneath)
2866 if (t->to_read_description != NULL)
2868 const struct target_desc *tdesc;
2870 tdesc = t->to_read_description (t);
2878 /* The default implementation of to_search_memory.
2879 This implements a basic search of memory, reading target memory and
2880 performing the search here (as opposed to performing the search in on the
2881 target side with, for example, gdbserver). */
2884 simple_search_memory (struct target_ops *ops,
2885 CORE_ADDR start_addr, ULONGEST search_space_len,
2886 const gdb_byte *pattern, ULONGEST pattern_len,
2887 CORE_ADDR *found_addrp)
2889 /* NOTE: also defined in find.c testcase. */
2890 #define SEARCH_CHUNK_SIZE 16000
2891 const unsigned chunk_size = SEARCH_CHUNK_SIZE;
2892 /* Buffer to hold memory contents for searching. */
2893 gdb_byte *search_buf;
2894 unsigned search_buf_size;
2895 struct cleanup *old_cleanups;
2897 search_buf_size = chunk_size + pattern_len - 1;
2899 /* No point in trying to allocate a buffer larger than the search space. */
2900 if (search_space_len < search_buf_size)
2901 search_buf_size = search_space_len;
2903 search_buf = malloc (search_buf_size);
2904 if (search_buf == NULL)
2905 error (_("Unable to allocate memory to perform the search."));
2906 old_cleanups = make_cleanup (free_current_contents, &search_buf);
2908 /* Prime the search buffer. */
2910 if (target_read (ops, TARGET_OBJECT_MEMORY, NULL,
2911 search_buf, start_addr, search_buf_size) != search_buf_size)
2913 warning (_("Unable to access %s bytes of target "
2914 "memory at %s, halting search."),
2915 pulongest (search_buf_size), hex_string (start_addr));
2916 do_cleanups (old_cleanups);
2920 /* Perform the search.
2922 The loop is kept simple by allocating [N + pattern-length - 1] bytes.
2923 When we've scanned N bytes we copy the trailing bytes to the start and
2924 read in another N bytes. */
2926 while (search_space_len >= pattern_len)
2928 gdb_byte *found_ptr;
2929 unsigned nr_search_bytes = min (search_space_len, search_buf_size);
2931 found_ptr = memmem (search_buf, nr_search_bytes,
2932 pattern, pattern_len);
2934 if (found_ptr != NULL)
2936 CORE_ADDR found_addr = start_addr + (found_ptr - search_buf);
2938 *found_addrp = found_addr;
2939 do_cleanups (old_cleanups);
2943 /* Not found in this chunk, skip to next chunk. */
2945 /* Don't let search_space_len wrap here, it's unsigned. */
2946 if (search_space_len >= chunk_size)
2947 search_space_len -= chunk_size;
2949 search_space_len = 0;
2951 if (search_space_len >= pattern_len)
2953 unsigned keep_len = search_buf_size - chunk_size;
2954 CORE_ADDR read_addr = start_addr + chunk_size + keep_len;
2957 /* Copy the trailing part of the previous iteration to the front
2958 of the buffer for the next iteration. */
2959 gdb_assert (keep_len == pattern_len - 1);
2960 memcpy (search_buf, search_buf + chunk_size, keep_len);
2962 nr_to_read = min (search_space_len - keep_len, chunk_size);
2964 if (target_read (ops, TARGET_OBJECT_MEMORY, NULL,
2965 search_buf + keep_len, read_addr,
2966 nr_to_read) != nr_to_read)
2968 warning (_("Unable to access %s bytes of target "
2969 "memory at %s, halting search."),
2970 plongest (nr_to_read),
2971 hex_string (read_addr));
2972 do_cleanups (old_cleanups);
2976 start_addr += chunk_size;
2982 do_cleanups (old_cleanups);
2986 /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the
2987 sequence of bytes in PATTERN with length PATTERN_LEN.
2989 The result is 1 if found, 0 if not found, and -1 if there was an error
2990 requiring halting of the search (e.g. memory read error).
2991 If the pattern is found the address is recorded in FOUND_ADDRP. */
2994 target_search_memory (CORE_ADDR start_addr, ULONGEST search_space_len,
2995 const gdb_byte *pattern, ULONGEST pattern_len,
2996 CORE_ADDR *found_addrp)
2998 struct target_ops *t;
3001 /* We don't use INHERIT to set current_target.to_search_memory,
3002 so we have to scan the target stack and handle targetdebug
3006 fprintf_unfiltered (gdb_stdlog, "target_search_memory (%s, ...)\n",
3007 hex_string (start_addr));
3009 for (t = current_target.beneath; t != NULL; t = t->beneath)
3010 if (t->to_search_memory != NULL)
3015 found = t->to_search_memory (t, start_addr, search_space_len,
3016 pattern, pattern_len, found_addrp);
3020 /* If a special version of to_search_memory isn't available, use the
3022 found = simple_search_memory (current_target.beneath,
3023 start_addr, search_space_len,
3024 pattern, pattern_len, found_addrp);
3028 fprintf_unfiltered (gdb_stdlog, " = %d\n", found);
3033 /* Look through the currently pushed targets. If none of them will
3034 be able to restart the currently running process, issue an error
3038 target_require_runnable (void)
3040 struct target_ops *t;
3042 for (t = target_stack; t != NULL; t = t->beneath)
3044 /* If this target knows how to create a new program, then
3045 assume we will still be able to after killing the current
3046 one. Either killing and mourning will not pop T, or else
3047 find_default_run_target will find it again. */
3048 if (t->to_create_inferior != NULL)
3051 /* Do not worry about thread_stratum targets that can not
3052 create inferiors. Assume they will be pushed again if
3053 necessary, and continue to the process_stratum. */
3054 if (t->to_stratum == thread_stratum
3055 || t->to_stratum == arch_stratum)
3058 error (_("The \"%s\" target does not support \"run\". "
3059 "Try \"help target\" or \"continue\"."),
3063 /* This function is only called if the target is running. In that
3064 case there should have been a process_stratum target and it
3065 should either know how to create inferiors, or not... */
3066 internal_error (__FILE__, __LINE__, _("No targets found"));
3069 /* Look through the list of possible targets for a target that can
3070 execute a run or attach command without any other data. This is
3071 used to locate the default process stratum.
3073 If DO_MESG is not NULL, the result is always valid (error() is
3074 called for errors); else, return NULL on error. */
3076 static struct target_ops *
3077 find_default_run_target (char *do_mesg)
3079 struct target_ops **t;
3080 struct target_ops *runable = NULL;
3085 for (t = target_structs; t < target_structs + target_struct_size;
3088 if ((*t)->to_can_run && target_can_run (*t))
3098 error (_("Don't know how to %s. Try \"help target\"."), do_mesg);
3107 find_default_attach (struct target_ops *ops, char *args, int from_tty)
3109 struct target_ops *t;
3111 t = find_default_run_target ("attach");
3112 (t->to_attach) (t, args, from_tty);
3117 find_default_create_inferior (struct target_ops *ops,
3118 char *exec_file, char *allargs, char **env,
3121 struct target_ops *t;
3123 t = find_default_run_target ("run");
3124 (t->to_create_inferior) (t, exec_file, allargs, env, from_tty);
3129 find_default_can_async_p (struct target_ops *ignore)
3131 struct target_ops *t;
3133 /* This may be called before the target is pushed on the stack;
3134 look for the default process stratum. If there's none, gdb isn't
3135 configured with a native debugger, and target remote isn't
3137 t = find_default_run_target (NULL);
3138 if (t && t->to_can_async_p != delegate_can_async_p)
3139 return (t->to_can_async_p) (t);
3144 find_default_is_async_p (struct target_ops *ignore)
3146 struct target_ops *t;
3148 /* This may be called before the target is pushed on the stack;
3149 look for the default process stratum. If there's none, gdb isn't
3150 configured with a native debugger, and target remote isn't
3152 t = find_default_run_target (NULL);
3153 if (t && t->to_is_async_p != delegate_is_async_p)
3154 return (t->to_is_async_p) (t);
3159 find_default_supports_non_stop (struct target_ops *self)
3161 struct target_ops *t;
3163 t = find_default_run_target (NULL);
3164 if (t && t->to_supports_non_stop)
3165 return (t->to_supports_non_stop) (t);
3170 target_supports_non_stop (void)
3172 struct target_ops *t;
3174 for (t = ¤t_target; t != NULL; t = t->beneath)
3175 if (t->to_supports_non_stop)
3176 return t->to_supports_non_stop (t);
3181 /* Implement the "info proc" command. */
3184 target_info_proc (char *args, enum info_proc_what what)
3186 struct target_ops *t;
3188 /* If we're already connected to something that can get us OS
3189 related data, use it. Otherwise, try using the native
3191 if (current_target.to_stratum >= process_stratum)
3192 t = current_target.beneath;
3194 t = find_default_run_target (NULL);
3196 for (; t != NULL; t = t->beneath)
3198 if (t->to_info_proc != NULL)
3200 t->to_info_proc (t, args, what);
3203 fprintf_unfiltered (gdb_stdlog,
3204 "target_info_proc (\"%s\", %d)\n", args, what);
3214 find_default_supports_disable_randomization (struct target_ops *self)
3216 struct target_ops *t;
3218 t = find_default_run_target (NULL);
3219 if (t && t->to_supports_disable_randomization)
3220 return (t->to_supports_disable_randomization) (t);
3225 target_supports_disable_randomization (void)
3227 struct target_ops *t;
3229 for (t = ¤t_target; t != NULL; t = t->beneath)
3230 if (t->to_supports_disable_randomization)
3231 return t->to_supports_disable_randomization (t);
3237 target_get_osdata (const char *type)
3239 struct target_ops *t;
3241 /* If we're already connected to something that can get us OS
3242 related data, use it. Otherwise, try using the native
3244 if (current_target.to_stratum >= process_stratum)
3245 t = current_target.beneath;
3247 t = find_default_run_target ("get OS data");
3252 return target_read_stralloc (t, TARGET_OBJECT_OSDATA, type);
3255 /* Determine the current address space of thread PTID. */
3257 struct address_space *
3258 target_thread_address_space (ptid_t ptid)
3260 struct address_space *aspace;
3261 struct inferior *inf;
3262 struct target_ops *t;
3264 for (t = current_target.beneath; t != NULL; t = t->beneath)
3266 if (t->to_thread_address_space != NULL)
3268 aspace = t->to_thread_address_space (t, ptid);
3269 gdb_assert (aspace);
3272 fprintf_unfiltered (gdb_stdlog,
3273 "target_thread_address_space (%s) = %d\n",
3274 target_pid_to_str (ptid),
3275 address_space_num (aspace));
3280 /* Fall-back to the "main" address space of the inferior. */
3281 inf = find_inferior_pid (ptid_get_pid (ptid));
3283 if (inf == NULL || inf->aspace == NULL)
3284 internal_error (__FILE__, __LINE__,
3285 _("Can't determine the current "
3286 "address space of thread %s\n"),
3287 target_pid_to_str (ptid));
3293 /* Target file operations. */
3295 static struct target_ops *
3296 default_fileio_target (void)
3298 /* If we're already connected to something that can perform
3299 file I/O, use it. Otherwise, try using the native target. */
3300 if (current_target.to_stratum >= process_stratum)
3301 return current_target.beneath;
3303 return find_default_run_target ("file I/O");
3306 /* Open FILENAME on the target, using FLAGS and MODE. Return a
3307 target file descriptor, or -1 if an error occurs (and set
3310 target_fileio_open (const char *filename, int flags, int mode,
3313 struct target_ops *t;
3315 for (t = default_fileio_target (); t != NULL; t = t->beneath)
3317 if (t->to_fileio_open != NULL)
3319 int fd = t->to_fileio_open (t, filename, flags, mode, target_errno);
3322 fprintf_unfiltered (gdb_stdlog,
3323 "target_fileio_open (%s,0x%x,0%o) = %d (%d)\n",
3324 filename, flags, mode,
3325 fd, fd != -1 ? 0 : *target_errno);
3330 *target_errno = FILEIO_ENOSYS;
3334 /* Write up to LEN bytes from WRITE_BUF to FD on the target.
3335 Return the number of bytes written, or -1 if an error occurs
3336 (and set *TARGET_ERRNO). */
3338 target_fileio_pwrite (int fd, const gdb_byte *write_buf, int len,
3339 ULONGEST offset, int *target_errno)
3341 struct target_ops *t;
3343 for (t = default_fileio_target (); t != NULL; t = t->beneath)
3345 if (t->to_fileio_pwrite != NULL)
3347 int ret = t->to_fileio_pwrite (t, fd, write_buf, len, offset,
3351 fprintf_unfiltered (gdb_stdlog,
3352 "target_fileio_pwrite (%d,...,%d,%s) "
3354 fd, len, pulongest (offset),
3355 ret, ret != -1 ? 0 : *target_errno);
3360 *target_errno = FILEIO_ENOSYS;
3364 /* Read up to LEN bytes FD on the target into READ_BUF.
3365 Return the number of bytes read, or -1 if an error occurs
3366 (and set *TARGET_ERRNO). */
3368 target_fileio_pread (int fd, gdb_byte *read_buf, int len,
3369 ULONGEST offset, int *target_errno)
3371 struct target_ops *t;
3373 for (t = default_fileio_target (); t != NULL; t = t->beneath)
3375 if (t->to_fileio_pread != NULL)
3377 int ret = t->to_fileio_pread (t, fd, read_buf, len, offset,
3381 fprintf_unfiltered (gdb_stdlog,
3382 "target_fileio_pread (%d,...,%d,%s) "
3384 fd, len, pulongest (offset),
3385 ret, ret != -1 ? 0 : *target_errno);
3390 *target_errno = FILEIO_ENOSYS;
3394 /* Close FD on the target. Return 0, or -1 if an error occurs
3395 (and set *TARGET_ERRNO). */
3397 target_fileio_close (int fd, int *target_errno)
3399 struct target_ops *t;
3401 for (t = default_fileio_target (); t != NULL; t = t->beneath)
3403 if (t->to_fileio_close != NULL)
3405 int ret = t->to_fileio_close (t, fd, target_errno);
3408 fprintf_unfiltered (gdb_stdlog,
3409 "target_fileio_close (%d) = %d (%d)\n",
3410 fd, ret, ret != -1 ? 0 : *target_errno);
3415 *target_errno = FILEIO_ENOSYS;
3419 /* Unlink FILENAME on the target. Return 0, or -1 if an error
3420 occurs (and set *TARGET_ERRNO). */
3422 target_fileio_unlink (const char *filename, int *target_errno)
3424 struct target_ops *t;
3426 for (t = default_fileio_target (); t != NULL; t = t->beneath)
3428 if (t->to_fileio_unlink != NULL)
3430 int ret = t->to_fileio_unlink (t, filename, target_errno);
3433 fprintf_unfiltered (gdb_stdlog,
3434 "target_fileio_unlink (%s) = %d (%d)\n",
3435 filename, ret, ret != -1 ? 0 : *target_errno);
3440 *target_errno = FILEIO_ENOSYS;
3444 /* Read value of symbolic link FILENAME on the target. Return a
3445 null-terminated string allocated via xmalloc, or NULL if an error
3446 occurs (and set *TARGET_ERRNO). */
3448 target_fileio_readlink (const char *filename, int *target_errno)
3450 struct target_ops *t;
3452 for (t = default_fileio_target (); t != NULL; t = t->beneath)
3454 if (t->to_fileio_readlink != NULL)
3456 char *ret = t->to_fileio_readlink (t, filename, target_errno);
3459 fprintf_unfiltered (gdb_stdlog,
3460 "target_fileio_readlink (%s) = %s (%d)\n",
3461 filename, ret? ret : "(nil)",
3462 ret? 0 : *target_errno);
3467 *target_errno = FILEIO_ENOSYS;
3472 target_fileio_close_cleanup (void *opaque)
3474 int fd = *(int *) opaque;
3477 target_fileio_close (fd, &target_errno);
3480 /* Read target file FILENAME. Store the result in *BUF_P and
3481 return the size of the transferred data. PADDING additional bytes are
3482 available in *BUF_P. This is a helper function for
3483 target_fileio_read_alloc; see the declaration of that function for more
3487 target_fileio_read_alloc_1 (const char *filename,
3488 gdb_byte **buf_p, int padding)
3490 struct cleanup *close_cleanup;
3491 size_t buf_alloc, buf_pos;
3497 fd = target_fileio_open (filename, FILEIO_O_RDONLY, 0700, &target_errno);
3501 close_cleanup = make_cleanup (target_fileio_close_cleanup, &fd);
3503 /* Start by reading up to 4K at a time. The target will throttle
3504 this number down if necessary. */
3506 buf = xmalloc (buf_alloc);
3510 n = target_fileio_pread (fd, &buf[buf_pos],
3511 buf_alloc - buf_pos - padding, buf_pos,
3515 /* An error occurred. */
3516 do_cleanups (close_cleanup);
3522 /* Read all there was. */
3523 do_cleanups (close_cleanup);
3533 /* If the buffer is filling up, expand it. */
3534 if (buf_alloc < buf_pos * 2)
3537 buf = xrealloc (buf, buf_alloc);
3544 /* Read target file FILENAME. Store the result in *BUF_P and return
3545 the size of the transferred data. See the declaration in "target.h"
3546 function for more information about the return value. */
3549 target_fileio_read_alloc (const char *filename, gdb_byte **buf_p)
3551 return target_fileio_read_alloc_1 (filename, buf_p, 0);
3554 /* Read target file FILENAME. The result is NUL-terminated and
3555 returned as a string, allocated using xmalloc. If an error occurs
3556 or the transfer is unsupported, NULL is returned. Empty objects
3557 are returned as allocated but empty strings. A warning is issued
3558 if the result contains any embedded NUL bytes. */
3561 target_fileio_read_stralloc (const char *filename)
3565 LONGEST i, transferred;
3567 transferred = target_fileio_read_alloc_1 (filename, &buffer, 1);
3568 bufstr = (char *) buffer;
3570 if (transferred < 0)
3573 if (transferred == 0)
3574 return xstrdup ("");
3576 bufstr[transferred] = 0;
3578 /* Check for embedded NUL bytes; but allow trailing NULs. */
3579 for (i = strlen (bufstr); i < transferred; i++)
3582 warning (_("target file %s "
3583 "contained unexpected null characters"),
3593 default_region_ok_for_hw_watchpoint (struct target_ops *self,
3594 CORE_ADDR addr, int len)
3596 return (len <= gdbarch_ptr_bit (target_gdbarch ()) / TARGET_CHAR_BIT);
3600 default_watchpoint_addr_within_range (struct target_ops *target,
3602 CORE_ADDR start, int length)
3604 return addr >= start && addr < start + length;
3607 static struct gdbarch *
3608 default_thread_architecture (struct target_ops *ops, ptid_t ptid)
3610 return target_gdbarch ();
3626 return_minus_one (void)
3638 * Find the next target down the stack from the specified target.
3642 find_target_beneath (struct target_ops *t)
3650 find_target_at (enum strata stratum)
3652 struct target_ops *t;
3654 for (t = current_target.beneath; t != NULL; t = t->beneath)
3655 if (t->to_stratum == stratum)
3662 /* The inferior process has died. Long live the inferior! */
3665 generic_mourn_inferior (void)
3669 ptid = inferior_ptid;
3670 inferior_ptid = null_ptid;
3672 /* Mark breakpoints uninserted in case something tries to delete a
3673 breakpoint while we delete the inferior's threads (which would
3674 fail, since the inferior is long gone). */
3675 mark_breakpoints_out ();
3677 if (!ptid_equal (ptid, null_ptid))
3679 int pid = ptid_get_pid (ptid);
3680 exit_inferior (pid);
3683 /* Note this wipes step-resume breakpoints, so needs to be done
3684 after exit_inferior, which ends up referencing the step-resume
3685 breakpoints through clear_thread_inferior_resources. */
3686 breakpoint_init_inferior (inf_exited);
3688 registers_changed ();
3690 reopen_exec_file ();
3691 reinit_frame_cache ();
3693 if (deprecated_detach_hook)
3694 deprecated_detach_hook ();
3697 /* Convert a normal process ID to a string. Returns the string in a
3701 normal_pid_to_str (ptid_t ptid)
3703 static char buf[32];
3705 xsnprintf (buf, sizeof buf, "process %d", ptid_get_pid (ptid));
3710 dummy_pid_to_str (struct target_ops *ops, ptid_t ptid)
3712 return normal_pid_to_str (ptid);
3715 /* Error-catcher for target_find_memory_regions. */
3717 dummy_find_memory_regions (struct target_ops *self,
3718 find_memory_region_ftype ignore1, void *ignore2)
3720 error (_("Command not implemented for this target."));
3724 /* Error-catcher for target_make_corefile_notes. */
3726 dummy_make_corefile_notes (struct target_ops *self,
3727 bfd *ignore1, int *ignore2)
3729 error (_("Command not implemented for this target."));
3733 /* Error-catcher for target_get_bookmark. */
3735 dummy_get_bookmark (struct target_ops *self, char *ignore1, int ignore2)
3741 /* Error-catcher for target_goto_bookmark. */
3743 dummy_goto_bookmark (struct target_ops *self, gdb_byte *ignore, int from_tty)
3748 /* Set up the handful of non-empty slots needed by the dummy target
3752 init_dummy_target (void)
3754 dummy_target.to_shortname = "None";
3755 dummy_target.to_longname = "None";
3756 dummy_target.to_doc = "";
3757 dummy_target.to_create_inferior = find_default_create_inferior;
3758 dummy_target.to_supports_non_stop = find_default_supports_non_stop;
3759 dummy_target.to_supports_disable_randomization
3760 = find_default_supports_disable_randomization;
3761 dummy_target.to_pid_to_str = dummy_pid_to_str;
3762 dummy_target.to_stratum = dummy_stratum;
3763 dummy_target.to_find_memory_regions = dummy_find_memory_regions;
3764 dummy_target.to_make_corefile_notes = dummy_make_corefile_notes;
3765 dummy_target.to_get_bookmark = dummy_get_bookmark;
3766 dummy_target.to_goto_bookmark = dummy_goto_bookmark;
3767 dummy_target.to_has_all_memory = (int (*) (struct target_ops *)) return_zero;
3768 dummy_target.to_has_memory = (int (*) (struct target_ops *)) return_zero;
3769 dummy_target.to_has_stack = (int (*) (struct target_ops *)) return_zero;
3770 dummy_target.to_has_registers = (int (*) (struct target_ops *)) return_zero;
3771 dummy_target.to_has_execution
3772 = (int (*) (struct target_ops *, ptid_t)) return_zero;
3773 dummy_target.to_magic = OPS_MAGIC;
3775 install_dummy_methods (&dummy_target);
3779 debug_to_open (char *args, int from_tty)
3781 debug_target.to_open (args, from_tty);
3783 fprintf_unfiltered (gdb_stdlog, "target_open (%s, %d)\n", args, from_tty);
3787 target_close (struct target_ops *targ)
3789 gdb_assert (!target_is_pushed (targ));
3791 if (targ->to_xclose != NULL)
3792 targ->to_xclose (targ);
3793 else if (targ->to_close != NULL)
3794 targ->to_close (targ);
3797 fprintf_unfiltered (gdb_stdlog, "target_close ()\n");
3801 target_attach (char *args, int from_tty)
3803 current_target.to_attach (¤t_target, args, from_tty);
3805 fprintf_unfiltered (gdb_stdlog, "target_attach (%s, %d)\n",
3810 target_thread_alive (ptid_t ptid)
3812 struct target_ops *t;
3814 for (t = current_target.beneath; t != NULL; t = t->beneath)
3816 if (t->to_thread_alive != NULL)
3820 retval = t->to_thread_alive (t, ptid);
3822 fprintf_unfiltered (gdb_stdlog, "target_thread_alive (%d) = %d\n",
3823 ptid_get_pid (ptid), retval);
3833 target_find_new_threads (void)
3835 struct target_ops *t;
3837 for (t = current_target.beneath; t != NULL; t = t->beneath)
3839 if (t->to_find_new_threads != NULL)
3841 t->to_find_new_threads (t);
3843 fprintf_unfiltered (gdb_stdlog, "target_find_new_threads ()\n");
3851 target_stop (ptid_t ptid)
3855 warning (_("May not interrupt or stop the target, ignoring attempt"));
3859 (*current_target.to_stop) (¤t_target, ptid);
3863 debug_to_post_attach (struct target_ops *self, int pid)
3865 debug_target.to_post_attach (&debug_target, pid);
3867 fprintf_unfiltered (gdb_stdlog, "target_post_attach (%d)\n", pid);
3870 /* Concatenate ELEM to LIST, a comma separate list, and return the
3871 result. The LIST incoming argument is released. */
3874 str_comma_list_concat_elem (char *list, const char *elem)
3877 return xstrdup (elem);
3879 return reconcat (list, list, ", ", elem, (char *) NULL);
3882 /* Helper for target_options_to_string. If OPT is present in
3883 TARGET_OPTIONS, append the OPT_STR (string version of OPT) in RET.
3884 Returns the new resulting string. OPT is removed from
3888 do_option (int *target_options, char *ret,
3889 int opt, char *opt_str)
3891 if ((*target_options & opt) != 0)
3893 ret = str_comma_list_concat_elem (ret, opt_str);
3894 *target_options &= ~opt;
3901 target_options_to_string (int target_options)
3905 #define DO_TARG_OPTION(OPT) \
3906 ret = do_option (&target_options, ret, OPT, #OPT)
3908 DO_TARG_OPTION (TARGET_WNOHANG);
3910 if (target_options != 0)
3911 ret = str_comma_list_concat_elem (ret, "unknown???");
3919 debug_print_register (const char * func,
3920 struct regcache *regcache, int regno)
3922 struct gdbarch *gdbarch = get_regcache_arch (regcache);
3924 fprintf_unfiltered (gdb_stdlog, "%s ", func);
3925 if (regno >= 0 && regno < gdbarch_num_regs (gdbarch)
3926 && gdbarch_register_name (gdbarch, regno) != NULL
3927 && gdbarch_register_name (gdbarch, regno)[0] != '\0')
3928 fprintf_unfiltered (gdb_stdlog, "(%s)",
3929 gdbarch_register_name (gdbarch, regno));
3931 fprintf_unfiltered (gdb_stdlog, "(%d)", regno);
3932 if (regno >= 0 && regno < gdbarch_num_regs (gdbarch))
3934 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
3935 int i, size = register_size (gdbarch, regno);
3936 gdb_byte buf[MAX_REGISTER_SIZE];
3938 regcache_raw_collect (regcache, regno, buf);
3939 fprintf_unfiltered (gdb_stdlog, " = ");
3940 for (i = 0; i < size; i++)
3942 fprintf_unfiltered (gdb_stdlog, "%02x", buf[i]);
3944 if (size <= sizeof (LONGEST))
3946 ULONGEST val = extract_unsigned_integer (buf, size, byte_order);
3948 fprintf_unfiltered (gdb_stdlog, " %s %s",
3949 core_addr_to_string_nz (val), plongest (val));
3952 fprintf_unfiltered (gdb_stdlog, "\n");
3956 target_fetch_registers (struct regcache *regcache, int regno)
3958 struct target_ops *t;
3960 for (t = current_target.beneath; t != NULL; t = t->beneath)
3962 if (t->to_fetch_registers != NULL)
3964 t->to_fetch_registers (t, regcache, regno);
3966 debug_print_register ("target_fetch_registers", regcache, regno);
3973 target_store_registers (struct regcache *regcache, int regno)
3975 struct target_ops *t;
3977 if (!may_write_registers)
3978 error (_("Writing to registers is not allowed (regno %d)"), regno);
3980 current_target.to_store_registers (¤t_target, regcache, regno);
3983 debug_print_register ("target_store_registers", regcache, regno);
3988 target_core_of_thread (ptid_t ptid)
3990 struct target_ops *t;
3992 for (t = current_target.beneath; t != NULL; t = t->beneath)
3994 if (t->to_core_of_thread != NULL)
3996 int retval = t->to_core_of_thread (t, ptid);
3999 fprintf_unfiltered (gdb_stdlog,
4000 "target_core_of_thread (%d) = %d\n",
4001 ptid_get_pid (ptid), retval);
4010 target_verify_memory (const gdb_byte *data, CORE_ADDR memaddr, ULONGEST size)
4012 struct target_ops *t;
4014 for (t = current_target.beneath; t != NULL; t = t->beneath)
4016 if (t->to_verify_memory != NULL)
4018 int retval = t->to_verify_memory (t, data, memaddr, size);
4021 fprintf_unfiltered (gdb_stdlog,
4022 "target_verify_memory (%s, %s) = %d\n",
4023 paddress (target_gdbarch (), memaddr),
4033 /* The documentation for this function is in its prototype declaration in
4037 target_insert_mask_watchpoint (CORE_ADDR addr, CORE_ADDR mask, int rw)
4039 struct target_ops *t;
4041 for (t = current_target.beneath; t != NULL; t = t->beneath)
4042 if (t->to_insert_mask_watchpoint != NULL)
4046 ret = t->to_insert_mask_watchpoint (t, addr, mask, rw);
4049 fprintf_unfiltered (gdb_stdlog, "\
4050 target_insert_mask_watchpoint (%s, %s, %d) = %d\n",
4051 core_addr_to_string (addr),
4052 core_addr_to_string (mask), rw, ret);
4060 /* The documentation for this function is in its prototype declaration in
4064 target_remove_mask_watchpoint (CORE_ADDR addr, CORE_ADDR mask, int rw)
4066 struct target_ops *t;
4068 for (t = current_target.beneath; t != NULL; t = t->beneath)
4069 if (t->to_remove_mask_watchpoint != NULL)
4073 ret = t->to_remove_mask_watchpoint (t, addr, mask, rw);
4076 fprintf_unfiltered (gdb_stdlog, "\
4077 target_remove_mask_watchpoint (%s, %s, %d) = %d\n",
4078 core_addr_to_string (addr),
4079 core_addr_to_string (mask), rw, ret);
4087 /* The documentation for this function is in its prototype declaration
4091 target_masked_watch_num_registers (CORE_ADDR addr, CORE_ADDR mask)
4093 struct target_ops *t;
4095 for (t = current_target.beneath; t != NULL; t = t->beneath)
4096 if (t->to_masked_watch_num_registers != NULL)
4097 return t->to_masked_watch_num_registers (t, addr, mask);
4102 /* The documentation for this function is in its prototype declaration
4106 target_ranged_break_num_registers (void)
4108 struct target_ops *t;
4110 for (t = current_target.beneath; t != NULL; t = t->beneath)
4111 if (t->to_ranged_break_num_registers != NULL)
4112 return t->to_ranged_break_num_registers (t);
4119 struct btrace_target_info *
4120 target_enable_btrace (ptid_t ptid)
4122 struct target_ops *t;
4124 for (t = current_target.beneath; t != NULL; t = t->beneath)
4125 if (t->to_enable_btrace != NULL)
4126 return t->to_enable_btrace (t, ptid);
4135 target_disable_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_disable_btrace != NULL)
4142 t->to_disable_btrace (t, btinfo);
4152 target_teardown_btrace (struct btrace_target_info *btinfo)
4154 struct target_ops *t;
4156 for (t = current_target.beneath; t != NULL; t = t->beneath)
4157 if (t->to_teardown_btrace != NULL)
4159 t->to_teardown_btrace (t, btinfo);
4169 target_read_btrace (VEC (btrace_block_s) **btrace,
4170 struct btrace_target_info *btinfo,
4171 enum btrace_read_type type)
4173 struct target_ops *t;
4175 for (t = current_target.beneath; t != NULL; t = t->beneath)
4176 if (t->to_read_btrace != NULL)
4177 return t->to_read_btrace (t, btrace, btinfo, type);
4180 return BTRACE_ERR_NOT_SUPPORTED;
4186 target_stop_recording (void)
4188 struct target_ops *t;
4190 for (t = current_target.beneath; t != NULL; t = t->beneath)
4191 if (t->to_stop_recording != NULL)
4193 t->to_stop_recording (t);
4197 /* This is optional. */
4203 target_info_record (void)
4205 struct target_ops *t;
4207 for (t = current_target.beneath; t != NULL; t = t->beneath)
4208 if (t->to_info_record != NULL)
4210 t->to_info_record (t);
4220 target_save_record (const char *filename)
4222 struct target_ops *t;
4224 for (t = current_target.beneath; t != NULL; t = t->beneath)
4225 if (t->to_save_record != NULL)
4227 t->to_save_record (t, filename);
4237 target_supports_delete_record (void)
4239 struct target_ops *t;
4241 for (t = current_target.beneath; t != NULL; t = t->beneath)
4242 if (t->to_delete_record != NULL)
4251 target_delete_record (void)
4253 struct target_ops *t;
4255 for (t = current_target.beneath; t != NULL; t = t->beneath)
4256 if (t->to_delete_record != NULL)
4258 t->to_delete_record (t);
4268 target_record_is_replaying (void)
4270 struct target_ops *t;
4272 for (t = current_target.beneath; t != NULL; t = t->beneath)
4273 if (t->to_record_is_replaying != NULL)
4274 return t->to_record_is_replaying (t);
4282 target_goto_record_begin (void)
4284 struct target_ops *t;
4286 for (t = current_target.beneath; t != NULL; t = t->beneath)
4287 if (t->to_goto_record_begin != NULL)
4289 t->to_goto_record_begin (t);
4299 target_goto_record_end (void)
4301 struct target_ops *t;
4303 for (t = current_target.beneath; t != NULL; t = t->beneath)
4304 if (t->to_goto_record_end != NULL)
4306 t->to_goto_record_end (t);
4316 target_goto_record (ULONGEST insn)
4318 struct target_ops *t;
4320 for (t = current_target.beneath; t != NULL; t = t->beneath)
4321 if (t->to_goto_record != NULL)
4323 t->to_goto_record (t, insn);
4333 target_insn_history (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 != NULL)
4340 t->to_insn_history (t, size, flags);
4350 target_insn_history_from (ULONGEST from, int size, int flags)
4352 struct target_ops *t;
4354 for (t = current_target.beneath; t != NULL; t = t->beneath)
4355 if (t->to_insn_history_from != NULL)
4357 t->to_insn_history_from (t, from, size, flags);
4367 target_insn_history_range (ULONGEST begin, ULONGEST end, int flags)
4369 struct target_ops *t;
4371 for (t = current_target.beneath; t != NULL; t = t->beneath)
4372 if (t->to_insn_history_range != NULL)
4374 t->to_insn_history_range (t, begin, end, flags);
4384 target_call_history (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 != NULL)
4391 t->to_call_history (t, size, flags);
4401 target_call_history_from (ULONGEST begin, int size, int flags)
4403 struct target_ops *t;
4405 for (t = current_target.beneath; t != NULL; t = t->beneath)
4406 if (t->to_call_history_from != NULL)
4408 t->to_call_history_from (t, begin, size, flags);
4418 target_call_history_range (ULONGEST begin, ULONGEST end, int flags)
4420 struct target_ops *t;
4422 for (t = current_target.beneath; t != NULL; t = t->beneath)
4423 if (t->to_call_history_range != NULL)
4425 t->to_call_history_range (t, begin, end, flags);
4433 debug_to_prepare_to_store (struct target_ops *self, struct regcache *regcache)
4435 debug_target.to_prepare_to_store (&debug_target, regcache);
4437 fprintf_unfiltered (gdb_stdlog, "target_prepare_to_store ()\n");
4442 const struct frame_unwind *
4443 target_get_unwinder (void)
4445 struct target_ops *t;
4447 for (t = current_target.beneath; t != NULL; t = t->beneath)
4448 if (t->to_get_unwinder != NULL)
4449 return t->to_get_unwinder;
4456 const struct frame_unwind *
4457 target_get_tailcall_unwinder (void)
4459 struct target_ops *t;
4461 for (t = current_target.beneath; t != NULL; t = t->beneath)
4462 if (t->to_get_tailcall_unwinder != NULL)
4463 return t->to_get_tailcall_unwinder;
4471 forward_target_decr_pc_after_break (struct target_ops *ops,
4472 struct gdbarch *gdbarch)
4474 for (; ops != NULL; ops = ops->beneath)
4475 if (ops->to_decr_pc_after_break != NULL)
4476 return ops->to_decr_pc_after_break (ops, gdbarch);
4478 return gdbarch_decr_pc_after_break (gdbarch);
4484 target_decr_pc_after_break (struct gdbarch *gdbarch)
4486 return forward_target_decr_pc_after_break (current_target.beneath, gdbarch);
4490 deprecated_debug_xfer_memory (CORE_ADDR memaddr, bfd_byte *myaddr, int len,
4491 int write, struct mem_attrib *attrib,
4492 struct target_ops *target)
4496 retval = debug_target.deprecated_xfer_memory (memaddr, myaddr, len, write,
4499 fprintf_unfiltered (gdb_stdlog,
4500 "target_xfer_memory (%s, xxx, %d, %s, xxx) = %d",
4501 paddress (target_gdbarch (), memaddr), len,
4502 write ? "write" : "read", retval);
4508 fputs_unfiltered (", bytes =", gdb_stdlog);
4509 for (i = 0; i < retval; i++)
4511 if ((((intptr_t) &(myaddr[i])) & 0xf) == 0)
4513 if (targetdebug < 2 && i > 0)
4515 fprintf_unfiltered (gdb_stdlog, " ...");
4518 fprintf_unfiltered (gdb_stdlog, "\n");
4521 fprintf_unfiltered (gdb_stdlog, " %02x", myaddr[i] & 0xff);
4525 fputc_unfiltered ('\n', gdb_stdlog);
4531 debug_to_files_info (struct target_ops *target)
4533 debug_target.to_files_info (target);
4535 fprintf_unfiltered (gdb_stdlog, "target_files_info (xxx)\n");
4539 debug_to_insert_breakpoint (struct target_ops *ops, struct gdbarch *gdbarch,
4540 struct bp_target_info *bp_tgt)
4544 retval = debug_target.to_insert_breakpoint (&debug_target, gdbarch, bp_tgt);
4546 fprintf_unfiltered (gdb_stdlog,
4547 "target_insert_breakpoint (%s, xxx) = %ld\n",
4548 core_addr_to_string (bp_tgt->placed_address),
4549 (unsigned long) retval);
4554 debug_to_remove_breakpoint (struct target_ops *ops, struct gdbarch *gdbarch,
4555 struct bp_target_info *bp_tgt)
4559 retval = debug_target.to_remove_breakpoint (&debug_target, gdbarch, bp_tgt);
4561 fprintf_unfiltered (gdb_stdlog,
4562 "target_remove_breakpoint (%s, xxx) = %ld\n",
4563 core_addr_to_string (bp_tgt->placed_address),
4564 (unsigned long) retval);
4569 debug_to_can_use_hw_breakpoint (struct target_ops *self,
4570 int type, int cnt, int from_tty)
4574 retval = debug_target.to_can_use_hw_breakpoint (&debug_target,
4575 type, cnt, from_tty);
4577 fprintf_unfiltered (gdb_stdlog,
4578 "target_can_use_hw_breakpoint (%ld, %ld, %ld) = %ld\n",
4579 (unsigned long) type,
4580 (unsigned long) cnt,
4581 (unsigned long) from_tty,
4582 (unsigned long) retval);
4587 debug_to_region_ok_for_hw_watchpoint (struct target_ops *self,
4588 CORE_ADDR addr, int len)
4592 retval = debug_target.to_region_ok_for_hw_watchpoint (&debug_target,
4595 fprintf_unfiltered (gdb_stdlog,
4596 "target_region_ok_for_hw_watchpoint (%s, %ld) = %s\n",
4597 core_addr_to_string (addr), (unsigned long) len,
4598 core_addr_to_string (retval));
4603 debug_to_can_accel_watchpoint_condition (struct target_ops *self,
4604 CORE_ADDR addr, int len, int rw,
4605 struct expression *cond)
4609 retval = debug_target.to_can_accel_watchpoint_condition (&debug_target,
4613 fprintf_unfiltered (gdb_stdlog,
4614 "target_can_accel_watchpoint_condition "
4615 "(%s, %d, %d, %s) = %ld\n",
4616 core_addr_to_string (addr), len, rw,
4617 host_address_to_string (cond), (unsigned long) retval);
4622 debug_to_stopped_by_watchpoint (struct target_ops *ops)
4626 retval = debug_target.to_stopped_by_watchpoint (&debug_target);
4628 fprintf_unfiltered (gdb_stdlog,
4629 "target_stopped_by_watchpoint () = %ld\n",
4630 (unsigned long) retval);
4635 debug_to_stopped_data_address (struct target_ops *target, CORE_ADDR *addr)
4639 retval = debug_target.to_stopped_data_address (target, addr);
4641 fprintf_unfiltered (gdb_stdlog,
4642 "target_stopped_data_address ([%s]) = %ld\n",
4643 core_addr_to_string (*addr),
4644 (unsigned long)retval);
4649 debug_to_watchpoint_addr_within_range (struct target_ops *target,
4651 CORE_ADDR start, int length)
4655 retval = debug_target.to_watchpoint_addr_within_range (target, addr,
4658 fprintf_filtered (gdb_stdlog,
4659 "target_watchpoint_addr_within_range (%s, %s, %d) = %d\n",
4660 core_addr_to_string (addr), core_addr_to_string (start),
4666 debug_to_insert_hw_breakpoint (struct target_ops *self,
4667 struct gdbarch *gdbarch,
4668 struct bp_target_info *bp_tgt)
4672 retval = debug_target.to_insert_hw_breakpoint (&debug_target,
4675 fprintf_unfiltered (gdb_stdlog,
4676 "target_insert_hw_breakpoint (%s, xxx) = %ld\n",
4677 core_addr_to_string (bp_tgt->placed_address),
4678 (unsigned long) retval);
4683 debug_to_remove_hw_breakpoint (struct target_ops *self,
4684 struct gdbarch *gdbarch,
4685 struct bp_target_info *bp_tgt)
4689 retval = debug_target.to_remove_hw_breakpoint (&debug_target,
4692 fprintf_unfiltered (gdb_stdlog,
4693 "target_remove_hw_breakpoint (%s, xxx) = %ld\n",
4694 core_addr_to_string (bp_tgt->placed_address),
4695 (unsigned long) retval);
4700 debug_to_insert_watchpoint (struct target_ops *self,
4701 CORE_ADDR addr, int len, int type,
4702 struct expression *cond)
4706 retval = debug_target.to_insert_watchpoint (&debug_target,
4707 addr, len, type, cond);
4709 fprintf_unfiltered (gdb_stdlog,
4710 "target_insert_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_remove_watchpoint (struct target_ops *self,
4718 CORE_ADDR addr, int len, int type,
4719 struct expression *cond)
4723 retval = debug_target.to_remove_watchpoint (&debug_target,
4724 addr, len, type, cond);
4726 fprintf_unfiltered (gdb_stdlog,
4727 "target_remove_watchpoint (%s, %d, %d, %s) = %ld\n",
4728 core_addr_to_string (addr), len, type,
4729 host_address_to_string (cond), (unsigned long) retval);
4734 debug_to_terminal_init (struct target_ops *self)
4736 debug_target.to_terminal_init (&debug_target);
4738 fprintf_unfiltered (gdb_stdlog, "target_terminal_init ()\n");
4742 debug_to_terminal_inferior (struct target_ops *self)
4744 debug_target.to_terminal_inferior (&debug_target);
4746 fprintf_unfiltered (gdb_stdlog, "target_terminal_inferior ()\n");
4750 debug_to_terminal_ours_for_output (struct target_ops *self)
4752 debug_target.to_terminal_ours_for_output (&debug_target);
4754 fprintf_unfiltered (gdb_stdlog, "target_terminal_ours_for_output ()\n");
4758 debug_to_terminal_ours (struct target_ops *self)
4760 debug_target.to_terminal_ours (&debug_target);
4762 fprintf_unfiltered (gdb_stdlog, "target_terminal_ours ()\n");
4766 debug_to_terminal_save_ours (struct target_ops *self)
4768 debug_target.to_terminal_save_ours (&debug_target);
4770 fprintf_unfiltered (gdb_stdlog, "target_terminal_save_ours ()\n");
4774 debug_to_terminal_info (struct target_ops *self,
4775 const char *arg, int from_tty)
4777 debug_target.to_terminal_info (&debug_target, arg, from_tty);
4779 fprintf_unfiltered (gdb_stdlog, "target_terminal_info (%s, %d)\n", arg,
4784 debug_to_load (struct target_ops *self, char *args, int from_tty)
4786 debug_target.to_load (&debug_target, args, from_tty);
4788 fprintf_unfiltered (gdb_stdlog, "target_load (%s, %d)\n", args, from_tty);
4792 debug_to_post_startup_inferior (struct target_ops *self, ptid_t ptid)
4794 debug_target.to_post_startup_inferior (&debug_target, ptid);
4796 fprintf_unfiltered (gdb_stdlog, "target_post_startup_inferior (%d)\n",
4797 ptid_get_pid (ptid));
4801 debug_to_insert_fork_catchpoint (struct target_ops *self, int pid)
4805 retval = debug_target.to_insert_fork_catchpoint (&debug_target, pid);
4807 fprintf_unfiltered (gdb_stdlog, "target_insert_fork_catchpoint (%d) = %d\n",
4814 debug_to_remove_fork_catchpoint (struct target_ops *self, int pid)
4818 retval = debug_target.to_remove_fork_catchpoint (&debug_target, pid);
4820 fprintf_unfiltered (gdb_stdlog, "target_remove_fork_catchpoint (%d) = %d\n",
4827 debug_to_insert_vfork_catchpoint (struct target_ops *self, int pid)
4831 retval = debug_target.to_insert_vfork_catchpoint (&debug_target, pid);
4833 fprintf_unfiltered (gdb_stdlog, "target_insert_vfork_catchpoint (%d) = %d\n",
4840 debug_to_remove_vfork_catchpoint (struct target_ops *self, int pid)
4844 retval = debug_target.to_remove_vfork_catchpoint (&debug_target, pid);
4846 fprintf_unfiltered (gdb_stdlog, "target_remove_vfork_catchpoint (%d) = %d\n",
4853 debug_to_insert_exec_catchpoint (struct target_ops *self, int pid)
4857 retval = debug_target.to_insert_exec_catchpoint (&debug_target, pid);
4859 fprintf_unfiltered (gdb_stdlog, "target_insert_exec_catchpoint (%d) = %d\n",
4866 debug_to_remove_exec_catchpoint (struct target_ops *self, int pid)
4870 retval = debug_target.to_remove_exec_catchpoint (&debug_target, pid);
4872 fprintf_unfiltered (gdb_stdlog, "target_remove_exec_catchpoint (%d) = %d\n",
4879 debug_to_has_exited (struct target_ops *self,
4880 int pid, int wait_status, int *exit_status)
4884 has_exited = debug_target.to_has_exited (&debug_target,
4885 pid, wait_status, exit_status);
4887 fprintf_unfiltered (gdb_stdlog, "target_has_exited (%d, %d, %d) = %d\n",
4888 pid, wait_status, *exit_status, has_exited);
4894 debug_to_can_run (struct target_ops *self)
4898 retval = debug_target.to_can_run (&debug_target);
4900 fprintf_unfiltered (gdb_stdlog, "target_can_run () = %d\n", retval);
4905 static struct gdbarch *
4906 debug_to_thread_architecture (struct target_ops *ops, ptid_t ptid)
4908 struct gdbarch *retval;
4910 retval = debug_target.to_thread_architecture (ops, ptid);
4912 fprintf_unfiltered (gdb_stdlog,
4913 "target_thread_architecture (%s) = %s [%s]\n",
4914 target_pid_to_str (ptid),
4915 host_address_to_string (retval),
4916 gdbarch_bfd_arch_info (retval)->printable_name);
4921 debug_to_stop (struct target_ops *self, ptid_t ptid)
4923 debug_target.to_stop (&debug_target, ptid);
4925 fprintf_unfiltered (gdb_stdlog, "target_stop (%s)\n",
4926 target_pid_to_str (ptid));
4930 debug_to_rcmd (struct target_ops *self, char *command,
4931 struct ui_file *outbuf)
4933 debug_target.to_rcmd (&debug_target, command, outbuf);
4934 fprintf_unfiltered (gdb_stdlog, "target_rcmd (%s, ...)\n", command);
4938 debug_to_pid_to_exec_file (struct target_ops *self, int pid)
4942 exec_file = debug_target.to_pid_to_exec_file (&debug_target, pid);
4944 fprintf_unfiltered (gdb_stdlog, "target_pid_to_exec_file (%d) = %s\n",
4951 setup_target_debug (void)
4953 memcpy (&debug_target, ¤t_target, sizeof debug_target);
4955 current_target.to_open = debug_to_open;
4956 current_target.to_post_attach = debug_to_post_attach;
4957 current_target.to_prepare_to_store = debug_to_prepare_to_store;
4958 current_target.deprecated_xfer_memory = deprecated_debug_xfer_memory;
4959 current_target.to_files_info = debug_to_files_info;
4960 current_target.to_insert_breakpoint = debug_to_insert_breakpoint;
4961 current_target.to_remove_breakpoint = debug_to_remove_breakpoint;
4962 current_target.to_can_use_hw_breakpoint = debug_to_can_use_hw_breakpoint;
4963 current_target.to_insert_hw_breakpoint = debug_to_insert_hw_breakpoint;
4964 current_target.to_remove_hw_breakpoint = debug_to_remove_hw_breakpoint;
4965 current_target.to_insert_watchpoint = debug_to_insert_watchpoint;
4966 current_target.to_remove_watchpoint = debug_to_remove_watchpoint;
4967 current_target.to_stopped_by_watchpoint = debug_to_stopped_by_watchpoint;
4968 current_target.to_stopped_data_address = debug_to_stopped_data_address;
4969 current_target.to_watchpoint_addr_within_range
4970 = debug_to_watchpoint_addr_within_range;
4971 current_target.to_region_ok_for_hw_watchpoint
4972 = debug_to_region_ok_for_hw_watchpoint;
4973 current_target.to_can_accel_watchpoint_condition
4974 = debug_to_can_accel_watchpoint_condition;
4975 current_target.to_terminal_init = debug_to_terminal_init;
4976 current_target.to_terminal_inferior = debug_to_terminal_inferior;
4977 current_target.to_terminal_ours_for_output
4978 = debug_to_terminal_ours_for_output;
4979 current_target.to_terminal_ours = debug_to_terminal_ours;
4980 current_target.to_terminal_save_ours = debug_to_terminal_save_ours;
4981 current_target.to_terminal_info = debug_to_terminal_info;
4982 current_target.to_load = debug_to_load;
4983 current_target.to_post_startup_inferior = debug_to_post_startup_inferior;
4984 current_target.to_insert_fork_catchpoint = debug_to_insert_fork_catchpoint;
4985 current_target.to_remove_fork_catchpoint = debug_to_remove_fork_catchpoint;
4986 current_target.to_insert_vfork_catchpoint = debug_to_insert_vfork_catchpoint;
4987 current_target.to_remove_vfork_catchpoint = debug_to_remove_vfork_catchpoint;
4988 current_target.to_insert_exec_catchpoint = debug_to_insert_exec_catchpoint;
4989 current_target.to_remove_exec_catchpoint = debug_to_remove_exec_catchpoint;
4990 current_target.to_has_exited = debug_to_has_exited;
4991 current_target.to_can_run = debug_to_can_run;
4992 current_target.to_stop = debug_to_stop;
4993 current_target.to_rcmd = debug_to_rcmd;
4994 current_target.to_pid_to_exec_file = debug_to_pid_to_exec_file;
4995 current_target.to_thread_architecture = debug_to_thread_architecture;
4999 static char targ_desc[] =
5000 "Names of targets and files being debugged.\nShows the entire \
5001 stack of targets currently in use (including the exec-file,\n\
5002 core-file, and process, if any), as well as the symbol file name.";
5005 default_rcmd (struct target_ops *self, char *command, struct ui_file *output)
5007 error (_("\"monitor\" command not supported by this target."));
5011 do_monitor_command (char *cmd,
5014 target_rcmd (cmd, gdb_stdtarg);
5017 /* Print the name of each layers of our target stack. */
5020 maintenance_print_target_stack (char *cmd, int from_tty)
5022 struct target_ops *t;
5024 printf_filtered (_("The current target stack is:\n"));
5026 for (t = target_stack; t != NULL; t = t->beneath)
5028 printf_filtered (" - %s (%s)\n", t->to_shortname, t->to_longname);
5032 /* Controls if async mode is permitted. */
5033 int target_async_permitted = 0;
5035 /* The set command writes to this variable. If the inferior is
5036 executing, target_async_permitted is *not* updated. */
5037 static int target_async_permitted_1 = 0;
5040 set_target_async_command (char *args, int from_tty,
5041 struct cmd_list_element *c)
5043 if (have_live_inferiors ())
5045 target_async_permitted_1 = target_async_permitted;
5046 error (_("Cannot change this setting while the inferior is running."));
5049 target_async_permitted = target_async_permitted_1;
5053 show_target_async_command (struct ui_file *file, int from_tty,
5054 struct cmd_list_element *c,
5057 fprintf_filtered (file,
5058 _("Controlling the inferior in "
5059 "asynchronous mode is %s.\n"), value);
5062 /* Temporary copies of permission settings. */
5064 static int may_write_registers_1 = 1;
5065 static int may_write_memory_1 = 1;
5066 static int may_insert_breakpoints_1 = 1;
5067 static int may_insert_tracepoints_1 = 1;
5068 static int may_insert_fast_tracepoints_1 = 1;
5069 static int may_stop_1 = 1;
5071 /* Make the user-set values match the real values again. */
5074 update_target_permissions (void)
5076 may_write_registers_1 = may_write_registers;
5077 may_write_memory_1 = may_write_memory;
5078 may_insert_breakpoints_1 = may_insert_breakpoints;
5079 may_insert_tracepoints_1 = may_insert_tracepoints;
5080 may_insert_fast_tracepoints_1 = may_insert_fast_tracepoints;
5081 may_stop_1 = may_stop;
5084 /* The one function handles (most of) the permission flags in the same
5088 set_target_permissions (char *args, int from_tty,
5089 struct cmd_list_element *c)
5091 if (target_has_execution)
5093 update_target_permissions ();
5094 error (_("Cannot change this setting while the inferior is running."));
5097 /* Make the real values match the user-changed values. */
5098 may_write_registers = may_write_registers_1;
5099 may_insert_breakpoints = may_insert_breakpoints_1;
5100 may_insert_tracepoints = may_insert_tracepoints_1;
5101 may_insert_fast_tracepoints = may_insert_fast_tracepoints_1;
5102 may_stop = may_stop_1;
5103 update_observer_mode ();
5106 /* Set memory write permission independently of observer mode. */
5109 set_write_memory_permission (char *args, int from_tty,
5110 struct cmd_list_element *c)
5112 /* Make the real values match the user-changed values. */
5113 may_write_memory = may_write_memory_1;
5114 update_observer_mode ();
5119 initialize_targets (void)
5121 init_dummy_target ();
5122 push_target (&dummy_target);
5124 add_info ("target", target_info, targ_desc);
5125 add_info ("files", target_info, targ_desc);
5127 add_setshow_zuinteger_cmd ("target", class_maintenance, &targetdebug, _("\
5128 Set target debugging."), _("\
5129 Show target debugging."), _("\
5130 When non-zero, target debugging is enabled. Higher numbers are more\n\
5131 verbose. Changes do not take effect until the next \"run\" or \"target\"\n\
5135 &setdebuglist, &showdebuglist);
5137 add_setshow_boolean_cmd ("trust-readonly-sections", class_support,
5138 &trust_readonly, _("\
5139 Set mode for reading from readonly sections."), _("\
5140 Show mode for reading from readonly sections."), _("\
5141 When this mode is on, memory reads from readonly sections (such as .text)\n\
5142 will be read from the object file instead of from the target. This will\n\
5143 result in significant performance improvement for remote targets."),
5145 show_trust_readonly,
5146 &setlist, &showlist);
5148 add_com ("monitor", class_obscure, do_monitor_command,
5149 _("Send a command to the remote monitor (remote targets only)."));
5151 add_cmd ("target-stack", class_maintenance, maintenance_print_target_stack,
5152 _("Print the name of each layer of the internal target stack."),
5153 &maintenanceprintlist);
5155 add_setshow_boolean_cmd ("target-async", no_class,
5156 &target_async_permitted_1, _("\
5157 Set whether gdb controls the inferior in asynchronous mode."), _("\
5158 Show whether gdb controls the inferior in asynchronous mode."), _("\
5159 Tells gdb whether to control the inferior in asynchronous mode."),
5160 set_target_async_command,
5161 show_target_async_command,
5165 add_setshow_boolean_cmd ("may-write-registers", class_support,
5166 &may_write_registers_1, _("\
5167 Set permission to write into registers."), _("\
5168 Show permission to write into registers."), _("\
5169 When this permission is on, GDB may write into the target's registers.\n\
5170 Otherwise, any sort of write attempt will result in an error."),
5171 set_target_permissions, NULL,
5172 &setlist, &showlist);
5174 add_setshow_boolean_cmd ("may-write-memory", class_support,
5175 &may_write_memory_1, _("\
5176 Set permission to write into target memory."), _("\
5177 Show permission to write into target memory."), _("\
5178 When this permission is on, GDB may write into the target's memory.\n\
5179 Otherwise, any sort of write attempt will result in an error."),
5180 set_write_memory_permission, NULL,
5181 &setlist, &showlist);
5183 add_setshow_boolean_cmd ("may-insert-breakpoints", class_support,
5184 &may_insert_breakpoints_1, _("\
5185 Set permission to insert breakpoints in the target."), _("\
5186 Show permission to insert breakpoints in the target."), _("\
5187 When this permission is on, GDB may insert breakpoints in the program.\n\
5188 Otherwise, any sort of insertion attempt will result in an error."),
5189 set_target_permissions, NULL,
5190 &setlist, &showlist);
5192 add_setshow_boolean_cmd ("may-insert-tracepoints", class_support,
5193 &may_insert_tracepoints_1, _("\
5194 Set permission to insert tracepoints in the target."), _("\
5195 Show permission to insert tracepoints in the target."), _("\
5196 When this permission is on, GDB may insert tracepoints in the program.\n\
5197 Otherwise, any sort of insertion attempt will result in an error."),
5198 set_target_permissions, NULL,
5199 &setlist, &showlist);
5201 add_setshow_boolean_cmd ("may-insert-fast-tracepoints", class_support,
5202 &may_insert_fast_tracepoints_1, _("\
5203 Set permission to insert fast tracepoints in the target."), _("\
5204 Show permission to insert fast tracepoints in the target."), _("\
5205 When this permission is on, GDB may insert fast tracepoints.\n\
5206 Otherwise, any sort of insertion attempt will result in an error."),
5207 set_target_permissions, NULL,
5208 &setlist, &showlist);
5210 add_setshow_boolean_cmd ("may-interrupt", class_support,
5212 Set permission to interrupt or signal the target."), _("\
5213 Show permission to interrupt or signal the target."), _("\
5214 When this permission is on, GDB may interrupt/stop the target's execution.\n\
5215 Otherwise, any attempt to interrupt or stop will be ignored."),
5216 set_target_permissions, NULL,
5217 &setlist, &showlist);