1 /* Select target systems and architectures at runtime for GDB.
3 Copyright (C) 1990-2014 Free Software Foundation, Inc.
5 Contributed by Cygnus Support.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
26 #include "target-dcache.h"
36 #include "gdb_assert.h"
38 #include "exceptions.h"
39 #include "target-descriptions.h"
40 #include "gdbthread.h"
43 #include "inline-frame.h"
44 #include "tracepoint.h"
45 #include "gdb/fileio.h"
48 static void target_info (char *, int);
50 static void default_terminal_info (struct target_ops
*, const char *, int);
52 static int default_watchpoint_addr_within_range (struct target_ops
*,
53 CORE_ADDR
, CORE_ADDR
, int);
55 static int default_region_ok_for_hw_watchpoint (struct target_ops
*,
58 static void default_rcmd (struct target_ops
*, char *, struct ui_file
*);
60 static void tcomplain (void) ATTRIBUTE_NORETURN
;
62 static int nomemory (CORE_ADDR
, char *, int, int, struct target_ops
*);
64 static int return_zero (void);
66 static int return_one (void);
68 static int return_minus_one (void);
70 static void *return_null (void);
72 void target_ignore (void);
74 static void target_command (char *, int);
76 static struct target_ops
*find_default_run_target (char *);
78 static target_xfer_partial_ftype default_xfer_partial
;
80 static struct gdbarch
*default_thread_architecture (struct target_ops
*ops
,
83 static int find_default_can_async_p (struct target_ops
*ignore
);
85 static int find_default_is_async_p (struct target_ops
*ignore
);
87 #include "target-delegates.c"
89 static void init_dummy_target (void);
91 static struct target_ops debug_target
;
93 static void debug_to_open (char *, int);
95 static void debug_to_prepare_to_store (struct target_ops
*self
,
98 static void debug_to_files_info (struct target_ops
*);
100 static int debug_to_insert_breakpoint (struct target_ops
*, struct gdbarch
*,
101 struct bp_target_info
*);
103 static int debug_to_remove_breakpoint (struct target_ops
*, struct gdbarch
*,
104 struct bp_target_info
*);
106 static int debug_to_can_use_hw_breakpoint (struct target_ops
*self
,
109 static int debug_to_insert_hw_breakpoint (struct target_ops
*self
,
111 struct bp_target_info
*);
113 static int debug_to_remove_hw_breakpoint (struct target_ops
*self
,
115 struct bp_target_info
*);
117 static int debug_to_insert_watchpoint (struct target_ops
*self
,
119 struct expression
*);
121 static int debug_to_remove_watchpoint (struct target_ops
*self
,
123 struct expression
*);
125 static int debug_to_stopped_data_address (struct target_ops
*, CORE_ADDR
*);
127 static int debug_to_watchpoint_addr_within_range (struct target_ops
*,
128 CORE_ADDR
, CORE_ADDR
, int);
130 static int debug_to_region_ok_for_hw_watchpoint (struct target_ops
*self
,
133 static int debug_to_can_accel_watchpoint_condition (struct target_ops
*self
,
135 struct expression
*);
137 static void debug_to_terminal_init (struct target_ops
*self
);
139 static void debug_to_terminal_inferior (struct target_ops
*self
);
141 static void debug_to_terminal_ours_for_output (struct target_ops
*self
);
143 static void debug_to_terminal_save_ours (struct target_ops
*self
);
145 static void debug_to_terminal_ours (struct target_ops
*self
);
147 static void debug_to_load (struct target_ops
*self
, char *, int);
149 static int debug_to_can_run (struct target_ops
*self
);
151 static void debug_to_stop (struct target_ops
*self
, ptid_t
);
153 /* Pointer to array of target architecture structures; the size of the
154 array; the current index into the array; the allocated size of the
156 struct target_ops
**target_structs
;
157 unsigned target_struct_size
;
158 unsigned target_struct_allocsize
;
159 #define DEFAULT_ALLOCSIZE 10
161 /* The initial current target, so that there is always a semi-valid
164 static struct target_ops dummy_target
;
166 /* Top of target stack. */
168 static struct target_ops
*target_stack
;
170 /* The target structure we are currently using to talk to a process
171 or file or whatever "inferior" we have. */
173 struct target_ops current_target
;
175 /* Command list for target. */
177 static struct cmd_list_element
*targetlist
= NULL
;
179 /* Nonzero if we should trust readonly sections from the
180 executable when reading memory. */
182 static int trust_readonly
= 0;
184 /* Nonzero if we should show true memory content including
185 memory breakpoint inserted by gdb. */
187 static int show_memory_breakpoints
= 0;
189 /* These globals control whether GDB attempts to perform these
190 operations; they are useful for targets that need to prevent
191 inadvertant disruption, such as in non-stop mode. */
193 int may_write_registers
= 1;
195 int may_write_memory
= 1;
197 int may_insert_breakpoints
= 1;
199 int may_insert_tracepoints
= 1;
201 int may_insert_fast_tracepoints
= 1;
205 /* Non-zero if we want to see trace of target level stuff. */
207 static unsigned int targetdebug
= 0;
209 show_targetdebug (struct ui_file
*file
, int from_tty
,
210 struct cmd_list_element
*c
, const char *value
)
212 fprintf_filtered (file
, _("Target debugging is %s.\n"), value
);
215 static void setup_target_debug (void);
217 /* The user just typed 'target' without the name of a target. */
220 target_command (char *arg
, int from_tty
)
222 fputs_filtered ("Argument required (target name). Try `help target'\n",
226 /* Default target_has_* methods for process_stratum targets. */
229 default_child_has_all_memory (struct target_ops
*ops
)
231 /* If no inferior selected, then we can't read memory here. */
232 if (ptid_equal (inferior_ptid
, null_ptid
))
239 default_child_has_memory (struct target_ops
*ops
)
241 /* If no inferior selected, then we can't read memory here. */
242 if (ptid_equal (inferior_ptid
, null_ptid
))
249 default_child_has_stack (struct target_ops
*ops
)
251 /* If no inferior selected, there's no stack. */
252 if (ptid_equal (inferior_ptid
, null_ptid
))
259 default_child_has_registers (struct target_ops
*ops
)
261 /* Can't read registers from no inferior. */
262 if (ptid_equal (inferior_ptid
, null_ptid
))
269 default_child_has_execution (struct target_ops
*ops
, ptid_t the_ptid
)
271 /* If there's no thread selected, then we can't make it run through
273 if (ptid_equal (the_ptid
, null_ptid
))
281 target_has_all_memory_1 (void)
283 struct target_ops
*t
;
285 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
286 if (t
->to_has_all_memory (t
))
293 target_has_memory_1 (void)
295 struct target_ops
*t
;
297 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
298 if (t
->to_has_memory (t
))
305 target_has_stack_1 (void)
307 struct target_ops
*t
;
309 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
310 if (t
->to_has_stack (t
))
317 target_has_registers_1 (void)
319 struct target_ops
*t
;
321 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
322 if (t
->to_has_registers (t
))
329 target_has_execution_1 (ptid_t the_ptid
)
331 struct target_ops
*t
;
333 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
334 if (t
->to_has_execution (t
, the_ptid
))
341 target_has_execution_current (void)
343 return target_has_execution_1 (inferior_ptid
);
346 /* Complete initialization of T. This ensures that various fields in
347 T are set, if needed by the target implementation. */
350 complete_target_initialization (struct target_ops
*t
)
352 /* Provide default values for all "must have" methods. */
353 if (t
->to_xfer_partial
== NULL
)
354 t
->to_xfer_partial
= default_xfer_partial
;
356 if (t
->to_has_all_memory
== NULL
)
357 t
->to_has_all_memory
= (int (*) (struct target_ops
*)) return_zero
;
359 if (t
->to_has_memory
== NULL
)
360 t
->to_has_memory
= (int (*) (struct target_ops
*)) return_zero
;
362 if (t
->to_has_stack
== NULL
)
363 t
->to_has_stack
= (int (*) (struct target_ops
*)) return_zero
;
365 if (t
->to_has_registers
== NULL
)
366 t
->to_has_registers
= (int (*) (struct target_ops
*)) return_zero
;
368 if (t
->to_has_execution
== NULL
)
369 t
->to_has_execution
= (int (*) (struct target_ops
*, ptid_t
)) return_zero
;
371 install_delegators (t
);
374 /* Add possible target architecture T to the list and add a new
375 command 'target T->to_shortname'. Set COMPLETER as the command's
376 completer if not NULL. */
379 add_target_with_completer (struct target_ops
*t
,
380 completer_ftype
*completer
)
382 struct cmd_list_element
*c
;
384 complete_target_initialization (t
);
388 target_struct_allocsize
= DEFAULT_ALLOCSIZE
;
389 target_structs
= (struct target_ops
**) xmalloc
390 (target_struct_allocsize
* sizeof (*target_structs
));
392 if (target_struct_size
>= target_struct_allocsize
)
394 target_struct_allocsize
*= 2;
395 target_structs
= (struct target_ops
**)
396 xrealloc ((char *) target_structs
,
397 target_struct_allocsize
* sizeof (*target_structs
));
399 target_structs
[target_struct_size
++] = t
;
401 if (targetlist
== NULL
)
402 add_prefix_cmd ("target", class_run
, target_command
, _("\
403 Connect to a target machine or process.\n\
404 The first argument is the type or protocol of the target machine.\n\
405 Remaining arguments are interpreted by the target protocol. For more\n\
406 information on the arguments for a particular protocol, type\n\
407 `help target ' followed by the protocol name."),
408 &targetlist
, "target ", 0, &cmdlist
);
409 c
= add_cmd (t
->to_shortname
, no_class
, t
->to_open
, t
->to_doc
,
411 if (completer
!= NULL
)
412 set_cmd_completer (c
, completer
);
415 /* Add a possible target architecture to the list. */
418 add_target (struct target_ops
*t
)
420 add_target_with_completer (t
, NULL
);
426 add_deprecated_target_alias (struct target_ops
*t
, char *alias
)
428 struct cmd_list_element
*c
;
431 /* If we use add_alias_cmd, here, we do not get the deprecated warning,
433 c
= add_cmd (alias
, no_class
, t
->to_open
, t
->to_doc
, &targetlist
);
434 alt
= xstrprintf ("target %s", t
->to_shortname
);
435 deprecate_cmd (c
, alt
);
448 struct target_ops
*t
;
450 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
451 if (t
->to_kill
!= NULL
)
454 fprintf_unfiltered (gdb_stdlog
, "target_kill ()\n");
464 target_load (char *arg
, int from_tty
)
466 target_dcache_invalidate ();
467 (*current_target
.to_load
) (¤t_target
, arg
, from_tty
);
471 target_create_inferior (char *exec_file
, char *args
,
472 char **env
, int from_tty
)
474 struct target_ops
*t
;
476 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
478 if (t
->to_create_inferior
!= NULL
)
480 t
->to_create_inferior (t
, exec_file
, args
, env
, from_tty
);
482 fprintf_unfiltered (gdb_stdlog
,
483 "target_create_inferior (%s, %s, xxx, %d)\n",
484 exec_file
, args
, from_tty
);
489 internal_error (__FILE__
, __LINE__
,
490 _("could not find a target to create inferior"));
494 target_terminal_inferior (void)
496 /* A background resume (``run&'') should leave GDB in control of the
497 terminal. Use target_can_async_p, not target_is_async_p, since at
498 this point the target is not async yet. However, if sync_execution
499 is not set, we know it will become async prior to resume. */
500 if (target_can_async_p () && !sync_execution
)
503 /* If GDB is resuming the inferior in the foreground, install
504 inferior's terminal modes. */
505 (*current_target
.to_terminal_inferior
) (¤t_target
);
509 nomemory (CORE_ADDR memaddr
, char *myaddr
, int len
, int write
,
510 struct target_ops
*t
)
512 errno
= EIO
; /* Can't read/write this location. */
513 return 0; /* No bytes handled. */
519 error (_("You can't do that when your target is `%s'"),
520 current_target
.to_shortname
);
526 error (_("You can't do that without a process to debug."));
530 default_terminal_info (struct target_ops
*self
, const char *args
, int from_tty
)
532 printf_unfiltered (_("No saved terminal information.\n"));
535 /* A default implementation for the to_get_ada_task_ptid target method.
537 This function builds the PTID by using both LWP and TID as part of
538 the PTID lwp and tid elements. The pid used is the pid of the
542 default_get_ada_task_ptid (struct target_ops
*self
, long lwp
, long tid
)
544 return ptid_build (ptid_get_pid (inferior_ptid
), lwp
, tid
);
547 static enum exec_direction_kind
548 default_execution_direction (struct target_ops
*self
)
550 if (!target_can_execute_reverse
)
552 else if (!target_can_async_p ())
555 gdb_assert_not_reached ("\
556 to_execution_direction must be implemented for reverse async");
559 /* Go through the target stack from top to bottom, copying over zero
560 entries in current_target, then filling in still empty entries. In
561 effect, we are doing class inheritance through the pushed target
564 NOTE: cagney/2003-10-17: The problem with this inheritance, as it
565 is currently implemented, is that it discards any knowledge of
566 which target an inherited method originally belonged to.
567 Consequently, new new target methods should instead explicitly and
568 locally search the target stack for the target that can handle the
572 update_current_target (void)
574 struct target_ops
*t
;
576 /* First, reset current's contents. */
577 memset (¤t_target
, 0, sizeof (current_target
));
579 /* Install the delegators. */
580 install_delegators (¤t_target
);
582 #define INHERIT(FIELD, TARGET) \
583 if (!current_target.FIELD) \
584 current_target.FIELD = (TARGET)->FIELD
586 for (t
= target_stack
; t
; t
= t
->beneath
)
588 INHERIT (to_shortname
, t
);
589 INHERIT (to_longname
, t
);
591 /* Do not inherit to_open. */
592 /* Do not inherit to_close. */
593 /* Do not inherit to_attach. */
594 /* Do not inherit to_post_attach. */
595 INHERIT (to_attach_no_wait
, t
);
596 /* Do not inherit to_detach. */
597 /* Do not inherit to_disconnect. */
598 /* Do not inherit to_resume. */
599 /* Do not inherit to_wait. */
600 /* Do not inherit to_fetch_registers. */
601 /* Do not inherit to_store_registers. */
602 /* Do not inherit to_prepare_to_store. */
603 INHERIT (deprecated_xfer_memory
, t
);
604 /* Do not inherit to_files_info. */
605 /* Do not inherit to_insert_breakpoint. */
606 /* Do not inherit to_remove_breakpoint. */
607 /* Do not inherit to_can_use_hw_breakpoint. */
608 /* Do not inherit to_insert_hw_breakpoint. */
609 /* Do not inherit to_remove_hw_breakpoint. */
610 /* Do not inherit to_ranged_break_num_registers. */
611 /* Do not inherit to_insert_watchpoint. */
612 /* Do not inherit to_remove_watchpoint. */
613 /* Do not inherit to_insert_mask_watchpoint. */
614 /* Do not inherit to_remove_mask_watchpoint. */
615 /* Do not inherit to_stopped_data_address. */
616 INHERIT (to_have_steppable_watchpoint
, t
);
617 INHERIT (to_have_continuable_watchpoint
, t
);
618 /* Do not inherit to_stopped_by_watchpoint. */
619 /* Do not inherit to_watchpoint_addr_within_range. */
620 /* Do not inherit to_region_ok_for_hw_watchpoint. */
621 /* Do not inherit to_can_accel_watchpoint_condition. */
622 /* Do not inherit to_masked_watch_num_registers. */
623 /* Do not inherit to_terminal_init. */
624 /* Do not inherit to_terminal_inferior. */
625 /* Do not inherit to_terminal_ours_for_output. */
626 /* Do not inherit to_terminal_ours. */
627 /* Do not inherit to_terminal_save_ours. */
628 /* Do not inherit to_terminal_info. */
629 /* Do not inherit to_kill. */
630 /* Do not inherit to_load. */
631 /* Do no inherit to_create_inferior. */
632 /* Do not inherit to_post_startup_inferior. */
633 /* Do not inherit to_insert_fork_catchpoint. */
634 /* Do not inherit to_remove_fork_catchpoint. */
635 /* Do not inherit to_insert_vfork_catchpoint. */
636 /* Do not inherit to_remove_vfork_catchpoint. */
637 /* Do not inherit to_follow_fork. */
638 /* Do not inherit to_insert_exec_catchpoint. */
639 /* Do not inherit to_remove_exec_catchpoint. */
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_set_syscall_catchpoint
,
738 (int (*) (struct target_ops
*, int, int, int, int, int *))
740 de_fault (to_has_exited
,
741 (int (*) (struct target_ops
*, int, int, int *))
743 de_fault (to_can_run
,
744 (int (*) (struct target_ops
*))
746 de_fault (to_extra_thread_info
,
747 (char *(*) (struct target_ops
*, struct thread_info
*))
749 de_fault (to_thread_name
,
750 (char *(*) (struct target_ops
*, struct thread_info
*))
753 (void (*) (struct target_ops
*, ptid_t
))
755 de_fault (to_pid_to_exec_file
,
756 (char *(*) (struct target_ops
*, int))
758 de_fault (to_thread_architecture
,
759 default_thread_architecture
);
760 current_target
.to_read_description
= NULL
;
761 de_fault (to_get_ada_task_ptid
,
762 (ptid_t (*) (struct target_ops
*, long, long))
763 default_get_ada_task_ptid
);
764 de_fault (to_supports_multi_process
,
765 (int (*) (struct target_ops
*))
767 de_fault (to_supports_enable_disable_tracepoint
,
768 (int (*) (struct target_ops
*))
770 de_fault (to_supports_string_tracing
,
771 (int (*) (struct target_ops
*))
773 de_fault (to_trace_init
,
774 (void (*) (struct target_ops
*))
776 de_fault (to_download_tracepoint
,
777 (void (*) (struct target_ops
*, struct bp_location
*))
779 de_fault (to_can_download_tracepoint
,
780 (int (*) (struct target_ops
*))
782 de_fault (to_download_trace_state_variable
,
783 (void (*) (struct target_ops
*, struct trace_state_variable
*))
785 de_fault (to_enable_tracepoint
,
786 (void (*) (struct target_ops
*, struct bp_location
*))
788 de_fault (to_disable_tracepoint
,
789 (void (*) (struct target_ops
*, struct bp_location
*))
791 de_fault (to_trace_set_readonly_regions
,
792 (void (*) (struct target_ops
*))
794 de_fault (to_trace_start
,
795 (void (*) (struct target_ops
*))
797 de_fault (to_get_trace_status
,
798 (int (*) (struct target_ops
*, struct trace_status
*))
800 de_fault (to_get_tracepoint_status
,
801 (void (*) (struct target_ops
*, struct breakpoint
*,
802 struct uploaded_tp
*))
804 de_fault (to_trace_stop
,
805 (void (*) (struct target_ops
*))
807 de_fault (to_trace_find
,
808 (int (*) (struct target_ops
*,
809 enum trace_find_type
, int, CORE_ADDR
, CORE_ADDR
, int *))
811 de_fault (to_get_trace_state_variable_value
,
812 (int (*) (struct target_ops
*, int, LONGEST
*))
814 de_fault (to_save_trace_data
,
815 (int (*) (struct target_ops
*, const char *))
817 de_fault (to_upload_tracepoints
,
818 (int (*) (struct target_ops
*, struct uploaded_tp
**))
820 de_fault (to_upload_trace_state_variables
,
821 (int (*) (struct target_ops
*, struct uploaded_tsv
**))
823 de_fault (to_get_raw_trace_data
,
824 (LONGEST (*) (struct target_ops
*, gdb_byte
*, ULONGEST
, LONGEST
))
826 de_fault (to_get_min_fast_tracepoint_insn_len
,
827 (int (*) (struct target_ops
*))
829 de_fault (to_set_disconnected_tracing
,
830 (void (*) (struct target_ops
*, int))
832 de_fault (to_set_circular_trace_buffer
,
833 (void (*) (struct target_ops
*, int))
835 de_fault (to_set_trace_buffer_size
,
836 (void (*) (struct target_ops
*, LONGEST
))
838 de_fault (to_set_trace_notes
,
839 (int (*) (struct target_ops
*,
840 const char *, const char *, const char *))
842 de_fault (to_get_tib_address
,
843 (int (*) (struct target_ops
*, ptid_t
, CORE_ADDR
*))
845 de_fault (to_set_permissions
,
846 (void (*) (struct target_ops
*))
848 de_fault (to_static_tracepoint_marker_at
,
849 (int (*) (struct target_ops
*,
850 CORE_ADDR
, struct static_tracepoint_marker
*))
852 de_fault (to_static_tracepoint_markers_by_strid
,
853 (VEC(static_tracepoint_marker_p
) * (*) (struct target_ops
*,
856 de_fault (to_traceframe_info
,
857 (struct traceframe_info
* (*) (struct target_ops
*))
859 de_fault (to_supports_evaluation_of_breakpoint_conditions
,
860 (int (*) (struct target_ops
*))
862 de_fault (to_can_run_breakpoint_commands
,
863 (int (*) (struct target_ops
*))
865 de_fault (to_use_agent
,
866 (int (*) (struct target_ops
*, int))
868 de_fault (to_can_use_agent
,
869 (int (*) (struct target_ops
*))
871 de_fault (to_augmented_libraries_svr4_read
,
872 (int (*) (struct target_ops
*))
874 de_fault (to_execution_direction
, default_execution_direction
);
878 /* Finally, position the target-stack beneath the squashed
879 "current_target". That way code looking for a non-inherited
880 target method can quickly and simply find it. */
881 current_target
.beneath
= target_stack
;
884 setup_target_debug ();
887 /* Push a new target type into the stack of the existing target accessors,
888 possibly superseding some of the existing accessors.
890 Rather than allow an empty stack, we always have the dummy target at
891 the bottom stratum, so we can call the function vectors without
895 push_target (struct target_ops
*t
)
897 struct target_ops
**cur
;
899 /* Check magic number. If wrong, it probably means someone changed
900 the struct definition, but not all the places that initialize one. */
901 if (t
->to_magic
!= OPS_MAGIC
)
903 fprintf_unfiltered (gdb_stderr
,
904 "Magic number of %s target struct wrong\n",
906 internal_error (__FILE__
, __LINE__
,
907 _("failed internal consistency check"));
910 /* Find the proper stratum to install this target in. */
911 for (cur
= &target_stack
; (*cur
) != NULL
; cur
= &(*cur
)->beneath
)
913 if ((int) (t
->to_stratum
) >= (int) (*cur
)->to_stratum
)
917 /* If there's already targets at this stratum, remove them. */
918 /* FIXME: cagney/2003-10-15: I think this should be popping all
919 targets to CUR, and not just those at this stratum level. */
920 while ((*cur
) != NULL
&& t
->to_stratum
== (*cur
)->to_stratum
)
922 /* There's already something at this stratum level. Close it,
923 and un-hook it from the stack. */
924 struct target_ops
*tmp
= (*cur
);
926 (*cur
) = (*cur
)->beneath
;
931 /* We have removed all targets in our stratum, now add the new one. */
935 update_current_target ();
938 /* Remove a target_ops vector from the stack, wherever it may be.
939 Return how many times it was removed (0 or 1). */
942 unpush_target (struct target_ops
*t
)
944 struct target_ops
**cur
;
945 struct target_ops
*tmp
;
947 if (t
->to_stratum
== dummy_stratum
)
948 internal_error (__FILE__
, __LINE__
,
949 _("Attempt to unpush the dummy target"));
951 /* Look for the specified target. Note that we assume that a target
952 can only occur once in the target stack. */
954 for (cur
= &target_stack
; (*cur
) != NULL
; cur
= &(*cur
)->beneath
)
960 /* If we don't find target_ops, quit. Only open targets should be
965 /* Unchain the target. */
967 (*cur
) = (*cur
)->beneath
;
970 update_current_target ();
972 /* Finally close the target. Note we do this after unchaining, so
973 any target method calls from within the target_close
974 implementation don't end up in T anymore. */
981 pop_all_targets_above (enum strata above_stratum
)
983 while ((int) (current_target
.to_stratum
) > (int) above_stratum
)
985 if (!unpush_target (target_stack
))
987 fprintf_unfiltered (gdb_stderr
,
988 "pop_all_targets couldn't find target %s\n",
989 target_stack
->to_shortname
);
990 internal_error (__FILE__
, __LINE__
,
991 _("failed internal consistency check"));
998 pop_all_targets (void)
1000 pop_all_targets_above (dummy_stratum
);
1003 /* Return 1 if T is now pushed in the target stack. Return 0 otherwise. */
1006 target_is_pushed (struct target_ops
*t
)
1008 struct target_ops
**cur
;
1010 /* Check magic number. If wrong, it probably means someone changed
1011 the struct definition, but not all the places that initialize one. */
1012 if (t
->to_magic
!= OPS_MAGIC
)
1014 fprintf_unfiltered (gdb_stderr
,
1015 "Magic number of %s target struct wrong\n",
1017 internal_error (__FILE__
, __LINE__
,
1018 _("failed internal consistency check"));
1021 for (cur
= &target_stack
; (*cur
) != NULL
; cur
= &(*cur
)->beneath
)
1028 /* Using the objfile specified in OBJFILE, find the address for the
1029 current thread's thread-local storage with offset OFFSET. */
1031 target_translate_tls_address (struct objfile
*objfile
, CORE_ADDR offset
)
1033 volatile CORE_ADDR addr
= 0;
1034 struct target_ops
*target
;
1036 for (target
= current_target
.beneath
;
1038 target
= target
->beneath
)
1040 if (target
->to_get_thread_local_address
!= NULL
)
1045 && gdbarch_fetch_tls_load_module_address_p (target_gdbarch ()))
1047 ptid_t ptid
= inferior_ptid
;
1048 volatile struct gdb_exception ex
;
1050 TRY_CATCH (ex
, RETURN_MASK_ALL
)
1054 /* Fetch the load module address for this objfile. */
1055 lm_addr
= gdbarch_fetch_tls_load_module_address (target_gdbarch (),
1057 /* If it's 0, throw the appropriate exception. */
1059 throw_error (TLS_LOAD_MODULE_NOT_FOUND_ERROR
,
1060 _("TLS load module not found"));
1062 addr
= target
->to_get_thread_local_address (target
, ptid
,
1065 /* If an error occurred, print TLS related messages here. Otherwise,
1066 throw the error to some higher catcher. */
1069 int objfile_is_library
= (objfile
->flags
& OBJF_SHARED
);
1073 case TLS_NO_LIBRARY_SUPPORT_ERROR
:
1074 error (_("Cannot find thread-local variables "
1075 "in this thread library."));
1077 case TLS_LOAD_MODULE_NOT_FOUND_ERROR
:
1078 if (objfile_is_library
)
1079 error (_("Cannot find shared library `%s' in dynamic"
1080 " linker's load module list"), objfile_name (objfile
));
1082 error (_("Cannot find executable file `%s' in dynamic"
1083 " linker's load module list"), objfile_name (objfile
));
1085 case TLS_NOT_ALLOCATED_YET_ERROR
:
1086 if (objfile_is_library
)
1087 error (_("The inferior has not yet allocated storage for"
1088 " thread-local variables in\n"
1089 "the shared library `%s'\n"
1091 objfile_name (objfile
), target_pid_to_str (ptid
));
1093 error (_("The inferior has not yet allocated storage for"
1094 " thread-local variables in\n"
1095 "the executable `%s'\n"
1097 objfile_name (objfile
), target_pid_to_str (ptid
));
1099 case TLS_GENERIC_ERROR
:
1100 if (objfile_is_library
)
1101 error (_("Cannot find thread-local storage for %s, "
1102 "shared library %s:\n%s"),
1103 target_pid_to_str (ptid
),
1104 objfile_name (objfile
), ex
.message
);
1106 error (_("Cannot find thread-local storage for %s, "
1107 "executable file %s:\n%s"),
1108 target_pid_to_str (ptid
),
1109 objfile_name (objfile
), ex
.message
);
1112 throw_exception (ex
);
1117 /* It wouldn't be wrong here to try a gdbarch method, too; finding
1118 TLS is an ABI-specific thing. But we don't do that yet. */
1120 error (_("Cannot find thread-local variables on this target"));
1126 target_xfer_status_to_string (enum target_xfer_status err
)
1128 #define CASE(X) case X: return #X
1131 CASE(TARGET_XFER_E_IO
);
1132 CASE(TARGET_XFER_E_UNAVAILABLE
);
1141 #define MIN(A, B) (((A) <= (B)) ? (A) : (B))
1143 /* target_read_string -- read a null terminated string, up to LEN bytes,
1144 from MEMADDR in target. Set *ERRNOP to the errno code, or 0 if successful.
1145 Set *STRING to a pointer to malloc'd memory containing the data; the caller
1146 is responsible for freeing it. Return the number of bytes successfully
1150 target_read_string (CORE_ADDR memaddr
, char **string
, int len
, int *errnop
)
1152 int tlen
, offset
, i
;
1156 int buffer_allocated
;
1158 unsigned int nbytes_read
= 0;
1160 gdb_assert (string
);
1162 /* Small for testing. */
1163 buffer_allocated
= 4;
1164 buffer
= xmalloc (buffer_allocated
);
1169 tlen
= MIN (len
, 4 - (memaddr
& 3));
1170 offset
= memaddr
& 3;
1172 errcode
= target_read_memory (memaddr
& ~3, buf
, sizeof buf
);
1175 /* The transfer request might have crossed the boundary to an
1176 unallocated region of memory. Retry the transfer, requesting
1180 errcode
= target_read_memory (memaddr
, buf
, 1);
1185 if (bufptr
- buffer
+ tlen
> buffer_allocated
)
1189 bytes
= bufptr
- buffer
;
1190 buffer_allocated
*= 2;
1191 buffer
= xrealloc (buffer
, buffer_allocated
);
1192 bufptr
= buffer
+ bytes
;
1195 for (i
= 0; i
< tlen
; i
++)
1197 *bufptr
++ = buf
[i
+ offset
];
1198 if (buf
[i
+ offset
] == '\000')
1200 nbytes_read
+= i
+ 1;
1207 nbytes_read
+= tlen
;
1216 struct target_section_table
*
1217 target_get_section_table (struct target_ops
*target
)
1219 struct target_ops
*t
;
1222 fprintf_unfiltered (gdb_stdlog
, "target_get_section_table ()\n");
1224 for (t
= target
; t
!= NULL
; t
= t
->beneath
)
1225 if (t
->to_get_section_table
!= NULL
)
1226 return (*t
->to_get_section_table
) (t
);
1231 /* Find a section containing ADDR. */
1233 struct target_section
*
1234 target_section_by_addr (struct target_ops
*target
, CORE_ADDR addr
)
1236 struct target_section_table
*table
= target_get_section_table (target
);
1237 struct target_section
*secp
;
1242 for (secp
= table
->sections
; secp
< table
->sections_end
; secp
++)
1244 if (addr
>= secp
->addr
&& addr
< secp
->endaddr
)
1250 /* Read memory from the live target, even if currently inspecting a
1251 traceframe. The return is the same as that of target_read. */
1253 static enum target_xfer_status
1254 target_read_live_memory (enum target_object object
,
1255 ULONGEST memaddr
, gdb_byte
*myaddr
, ULONGEST len
,
1256 ULONGEST
*xfered_len
)
1258 enum target_xfer_status ret
;
1259 struct cleanup
*cleanup
;
1261 /* Switch momentarily out of tfind mode so to access live memory.
1262 Note that this must not clear global state, such as the frame
1263 cache, which must still remain valid for the previous traceframe.
1264 We may be _building_ the frame cache at this point. */
1265 cleanup
= make_cleanup_restore_traceframe_number ();
1266 set_traceframe_number (-1);
1268 ret
= target_xfer_partial (current_target
.beneath
, object
, NULL
,
1269 myaddr
, NULL
, memaddr
, len
, xfered_len
);
1271 do_cleanups (cleanup
);
1275 /* Using the set of read-only target sections of OPS, read live
1276 read-only memory. Note that the actual reads start from the
1277 top-most target again.
1279 For interface/parameters/return description see target.h,
1282 static enum target_xfer_status
1283 memory_xfer_live_readonly_partial (struct target_ops
*ops
,
1284 enum target_object object
,
1285 gdb_byte
*readbuf
, ULONGEST memaddr
,
1286 ULONGEST len
, ULONGEST
*xfered_len
)
1288 struct target_section
*secp
;
1289 struct target_section_table
*table
;
1291 secp
= target_section_by_addr (ops
, memaddr
);
1293 && (bfd_get_section_flags (secp
->the_bfd_section
->owner
,
1294 secp
->the_bfd_section
)
1297 struct target_section
*p
;
1298 ULONGEST memend
= memaddr
+ len
;
1300 table
= target_get_section_table (ops
);
1302 for (p
= table
->sections
; p
< table
->sections_end
; p
++)
1304 if (memaddr
>= p
->addr
)
1306 if (memend
<= p
->endaddr
)
1308 /* Entire transfer is within this section. */
1309 return target_read_live_memory (object
, memaddr
,
1310 readbuf
, len
, xfered_len
);
1312 else if (memaddr
>= p
->endaddr
)
1314 /* This section ends before the transfer starts. */
1319 /* This section overlaps the transfer. Just do half. */
1320 len
= p
->endaddr
- memaddr
;
1321 return target_read_live_memory (object
, memaddr
,
1322 readbuf
, len
, xfered_len
);
1328 return TARGET_XFER_EOF
;
1331 /* Read memory from more than one valid target. A core file, for
1332 instance, could have some of memory but delegate other bits to
1333 the target below it. So, we must manually try all targets. */
1335 static enum target_xfer_status
1336 raw_memory_xfer_partial (struct target_ops
*ops
, gdb_byte
*readbuf
,
1337 const gdb_byte
*writebuf
, ULONGEST memaddr
, LONGEST len
,
1338 ULONGEST
*xfered_len
)
1340 enum target_xfer_status res
;
1344 res
= ops
->to_xfer_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1345 readbuf
, writebuf
, memaddr
, len
,
1347 if (res
== TARGET_XFER_OK
)
1350 /* Stop if the target reports that the memory is not available. */
1351 if (res
== TARGET_XFER_E_UNAVAILABLE
)
1354 /* We want to continue past core files to executables, but not
1355 past a running target's memory. */
1356 if (ops
->to_has_all_memory (ops
))
1361 while (ops
!= NULL
);
1366 /* Perform a partial memory transfer.
1367 For docs see target.h, to_xfer_partial. */
1369 static enum target_xfer_status
1370 memory_xfer_partial_1 (struct target_ops
*ops
, enum target_object object
,
1371 gdb_byte
*readbuf
, const gdb_byte
*writebuf
, ULONGEST memaddr
,
1372 ULONGEST len
, ULONGEST
*xfered_len
)
1374 enum target_xfer_status res
;
1376 struct mem_region
*region
;
1377 struct inferior
*inf
;
1379 /* For accesses to unmapped overlay sections, read directly from
1380 files. Must do this first, as MEMADDR may need adjustment. */
1381 if (readbuf
!= NULL
&& overlay_debugging
)
1383 struct obj_section
*section
= find_pc_overlay (memaddr
);
1385 if (pc_in_unmapped_range (memaddr
, section
))
1387 struct target_section_table
*table
1388 = target_get_section_table (ops
);
1389 const char *section_name
= section
->the_bfd_section
->name
;
1391 memaddr
= overlay_mapped_address (memaddr
, section
);
1392 return section_table_xfer_memory_partial (readbuf
, writebuf
,
1393 memaddr
, len
, xfered_len
,
1395 table
->sections_end
,
1400 /* Try the executable files, if "trust-readonly-sections" is set. */
1401 if (readbuf
!= NULL
&& trust_readonly
)
1403 struct target_section
*secp
;
1404 struct target_section_table
*table
;
1406 secp
= target_section_by_addr (ops
, memaddr
);
1408 && (bfd_get_section_flags (secp
->the_bfd_section
->owner
,
1409 secp
->the_bfd_section
)
1412 table
= target_get_section_table (ops
);
1413 return section_table_xfer_memory_partial (readbuf
, writebuf
,
1414 memaddr
, len
, xfered_len
,
1416 table
->sections_end
,
1421 /* If reading unavailable memory in the context of traceframes, and
1422 this address falls within a read-only section, fallback to
1423 reading from live memory. */
1424 if (readbuf
!= NULL
&& get_traceframe_number () != -1)
1426 VEC(mem_range_s
) *available
;
1428 /* If we fail to get the set of available memory, then the
1429 target does not support querying traceframe info, and so we
1430 attempt reading from the traceframe anyway (assuming the
1431 target implements the old QTro packet then). */
1432 if (traceframe_available_memory (&available
, memaddr
, len
))
1434 struct cleanup
*old_chain
;
1436 old_chain
= make_cleanup (VEC_cleanup(mem_range_s
), &available
);
1438 if (VEC_empty (mem_range_s
, available
)
1439 || VEC_index (mem_range_s
, available
, 0)->start
!= memaddr
)
1441 /* Don't read into the traceframe's available
1443 if (!VEC_empty (mem_range_s
, available
))
1445 LONGEST oldlen
= len
;
1447 len
= VEC_index (mem_range_s
, available
, 0)->start
- memaddr
;
1448 gdb_assert (len
<= oldlen
);
1451 do_cleanups (old_chain
);
1453 /* This goes through the topmost target again. */
1454 res
= memory_xfer_live_readonly_partial (ops
, object
,
1457 if (res
== TARGET_XFER_OK
)
1458 return TARGET_XFER_OK
;
1461 /* No use trying further, we know some memory starting
1462 at MEMADDR isn't available. */
1464 return TARGET_XFER_E_UNAVAILABLE
;
1468 /* Don't try to read more than how much is available, in
1469 case the target implements the deprecated QTro packet to
1470 cater for older GDBs (the target's knowledge of read-only
1471 sections may be outdated by now). */
1472 len
= VEC_index (mem_range_s
, available
, 0)->length
;
1474 do_cleanups (old_chain
);
1478 /* Try GDB's internal data cache. */
1479 region
= lookup_mem_region (memaddr
);
1480 /* region->hi == 0 means there's no upper bound. */
1481 if (memaddr
+ len
< region
->hi
|| region
->hi
== 0)
1484 reg_len
= region
->hi
- memaddr
;
1486 switch (region
->attrib
.mode
)
1489 if (writebuf
!= NULL
)
1490 return TARGET_XFER_E_IO
;
1494 if (readbuf
!= NULL
)
1495 return TARGET_XFER_E_IO
;
1499 /* We only support writing to flash during "load" for now. */
1500 if (writebuf
!= NULL
)
1501 error (_("Writing to flash memory forbidden in this context"));
1505 return TARGET_XFER_E_IO
;
1508 if (!ptid_equal (inferior_ptid
, null_ptid
))
1509 inf
= find_inferior_pid (ptid_get_pid (inferior_ptid
));
1514 /* The dcache reads whole cache lines; that doesn't play well
1515 with reading from a trace buffer, because reading outside of
1516 the collected memory range fails. */
1517 && get_traceframe_number () == -1
1518 && (region
->attrib
.cache
1519 || (stack_cache_enabled_p () && object
== TARGET_OBJECT_STACK_MEMORY
)
1520 || (code_cache_enabled_p () && object
== TARGET_OBJECT_CODE_MEMORY
)))
1522 DCACHE
*dcache
= target_dcache_get_or_init ();
1525 if (readbuf
!= NULL
)
1526 l
= dcache_xfer_memory (ops
, dcache
, memaddr
, readbuf
, reg_len
, 0);
1528 /* FIXME drow/2006-08-09: If we're going to preserve const
1529 correctness dcache_xfer_memory should take readbuf and
1531 l
= dcache_xfer_memory (ops
, dcache
, memaddr
, (void *) writebuf
,
1534 return TARGET_XFER_E_IO
;
1537 *xfered_len
= (ULONGEST
) l
;
1538 return TARGET_XFER_OK
;
1542 /* If none of those methods found the memory we wanted, fall back
1543 to a target partial transfer. Normally a single call to
1544 to_xfer_partial is enough; if it doesn't recognize an object
1545 it will call the to_xfer_partial of the next target down.
1546 But for memory this won't do. Memory is the only target
1547 object which can be read from more than one valid target.
1548 A core file, for instance, could have some of memory but
1549 delegate other bits to the target below it. So, we must
1550 manually try all targets. */
1552 res
= raw_memory_xfer_partial (ops
, readbuf
, writebuf
, memaddr
, reg_len
,
1555 /* Make sure the cache gets updated no matter what - if we are writing
1556 to the stack. Even if this write is not tagged as such, we still need
1557 to update the cache. */
1559 if (res
== TARGET_XFER_OK
1562 && target_dcache_init_p ()
1563 && !region
->attrib
.cache
1564 && ((stack_cache_enabled_p () && object
!= TARGET_OBJECT_STACK_MEMORY
)
1565 || (code_cache_enabled_p () && object
!= TARGET_OBJECT_CODE_MEMORY
)))
1567 DCACHE
*dcache
= target_dcache_get ();
1569 dcache_update (dcache
, memaddr
, (void *) writebuf
, reg_len
);
1572 /* If we still haven't got anything, return the last error. We
1577 /* Perform a partial memory transfer. For docs see target.h,
1580 static enum target_xfer_status
1581 memory_xfer_partial (struct target_ops
*ops
, enum target_object object
,
1582 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1583 ULONGEST memaddr
, ULONGEST len
, ULONGEST
*xfered_len
)
1585 enum target_xfer_status res
;
1587 /* Zero length requests are ok and require no work. */
1589 return TARGET_XFER_EOF
;
1591 /* Fill in READBUF with breakpoint shadows, or WRITEBUF with
1592 breakpoint insns, thus hiding out from higher layers whether
1593 there are software breakpoints inserted in the code stream. */
1594 if (readbuf
!= NULL
)
1596 res
= memory_xfer_partial_1 (ops
, object
, readbuf
, NULL
, memaddr
, len
,
1599 if (res
== TARGET_XFER_OK
&& !show_memory_breakpoints
)
1600 breakpoint_xfer_memory (readbuf
, NULL
, NULL
, memaddr
, res
);
1605 struct cleanup
*old_chain
;
1607 /* A large write request is likely to be partially satisfied
1608 by memory_xfer_partial_1. We will continually malloc
1609 and free a copy of the entire write request for breakpoint
1610 shadow handling even though we only end up writing a small
1611 subset of it. Cap writes to 4KB to mitigate this. */
1612 len
= min (4096, len
);
1614 buf
= xmalloc (len
);
1615 old_chain
= make_cleanup (xfree
, buf
);
1616 memcpy (buf
, writebuf
, len
);
1618 breakpoint_xfer_memory (NULL
, buf
, writebuf
, memaddr
, len
);
1619 res
= memory_xfer_partial_1 (ops
, object
, NULL
, buf
, memaddr
, len
,
1622 do_cleanups (old_chain
);
1629 restore_show_memory_breakpoints (void *arg
)
1631 show_memory_breakpoints
= (uintptr_t) arg
;
1635 make_show_memory_breakpoints_cleanup (int show
)
1637 int current
= show_memory_breakpoints
;
1639 show_memory_breakpoints
= show
;
1640 return make_cleanup (restore_show_memory_breakpoints
,
1641 (void *) (uintptr_t) current
);
1644 /* For docs see target.h, to_xfer_partial. */
1646 enum target_xfer_status
1647 target_xfer_partial (struct target_ops
*ops
,
1648 enum target_object object
, const char *annex
,
1649 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1650 ULONGEST offset
, ULONGEST len
,
1651 ULONGEST
*xfered_len
)
1653 enum target_xfer_status retval
;
1655 gdb_assert (ops
->to_xfer_partial
!= NULL
);
1657 /* Transfer is done when LEN is zero. */
1659 return TARGET_XFER_EOF
;
1661 if (writebuf
&& !may_write_memory
)
1662 error (_("Writing to memory is not allowed (addr %s, len %s)"),
1663 core_addr_to_string_nz (offset
), plongest (len
));
1667 /* If this is a memory transfer, let the memory-specific code
1668 have a look at it instead. Memory transfers are more
1670 if (object
== TARGET_OBJECT_MEMORY
|| object
== TARGET_OBJECT_STACK_MEMORY
1671 || object
== TARGET_OBJECT_CODE_MEMORY
)
1672 retval
= memory_xfer_partial (ops
, object
, readbuf
,
1673 writebuf
, offset
, len
, xfered_len
);
1674 else if (object
== TARGET_OBJECT_RAW_MEMORY
)
1676 /* Request the normal memory object from other layers. */
1677 retval
= raw_memory_xfer_partial (ops
, readbuf
, writebuf
, offset
, len
,
1681 retval
= ops
->to_xfer_partial (ops
, object
, annex
, readbuf
,
1682 writebuf
, offset
, len
, xfered_len
);
1686 const unsigned char *myaddr
= NULL
;
1688 fprintf_unfiltered (gdb_stdlog
,
1689 "%s:target_xfer_partial "
1690 "(%d, %s, %s, %s, %s, %s) = %d, %s",
1693 (annex
? annex
: "(null)"),
1694 host_address_to_string (readbuf
),
1695 host_address_to_string (writebuf
),
1696 core_addr_to_string_nz (offset
),
1697 pulongest (len
), retval
,
1698 pulongest (*xfered_len
));
1704 if (retval
== TARGET_XFER_OK
&& myaddr
!= NULL
)
1708 fputs_unfiltered (", bytes =", gdb_stdlog
);
1709 for (i
= 0; i
< *xfered_len
; i
++)
1711 if ((((intptr_t) &(myaddr
[i
])) & 0xf) == 0)
1713 if (targetdebug
< 2 && i
> 0)
1715 fprintf_unfiltered (gdb_stdlog
, " ...");
1718 fprintf_unfiltered (gdb_stdlog
, "\n");
1721 fprintf_unfiltered (gdb_stdlog
, " %02x", myaddr
[i
] & 0xff);
1725 fputc_unfiltered ('\n', gdb_stdlog
);
1728 /* Check implementations of to_xfer_partial update *XFERED_LEN
1729 properly. Do assertion after printing debug messages, so that we
1730 can find more clues on assertion failure from debugging messages. */
1731 if (retval
== TARGET_XFER_OK
|| retval
== TARGET_XFER_E_UNAVAILABLE
)
1732 gdb_assert (*xfered_len
> 0);
1737 /* Read LEN bytes of target memory at address MEMADDR, placing the
1738 results in GDB's memory at MYADDR. Returns either 0 for success or
1739 TARGET_XFER_E_IO if any error occurs.
1741 If an error occurs, no guarantee is made about the contents of the data at
1742 MYADDR. In particular, the caller should not depend upon partial reads
1743 filling the buffer with good data. There is no way for the caller to know
1744 how much good data might have been transfered anyway. Callers that can
1745 deal with partial reads should call target_read (which will retry until
1746 it makes no progress, and then return how much was transferred). */
1749 target_read_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1751 /* Dispatch to the topmost target, not the flattened current_target.
1752 Memory accesses check target->to_has_(all_)memory, and the
1753 flattened target doesn't inherit those. */
1754 if (target_read (current_target
.beneath
, TARGET_OBJECT_MEMORY
, NULL
,
1755 myaddr
, memaddr
, len
) == len
)
1758 return TARGET_XFER_E_IO
;
1761 /* Like target_read_memory, but specify explicitly that this is a read
1762 from the target's raw memory. That is, this read bypasses the
1763 dcache, breakpoint shadowing, etc. */
1766 target_read_raw_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1768 /* See comment in target_read_memory about why the request starts at
1769 current_target.beneath. */
1770 if (target_read (current_target
.beneath
, TARGET_OBJECT_RAW_MEMORY
, NULL
,
1771 myaddr
, memaddr
, len
) == len
)
1774 return TARGET_XFER_E_IO
;
1777 /* Like target_read_memory, but specify explicitly that this is a read from
1778 the target's stack. This may trigger different cache behavior. */
1781 target_read_stack (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1783 /* See comment in target_read_memory about why the request starts at
1784 current_target.beneath. */
1785 if (target_read (current_target
.beneath
, TARGET_OBJECT_STACK_MEMORY
, NULL
,
1786 myaddr
, memaddr
, len
) == len
)
1789 return TARGET_XFER_E_IO
;
1792 /* Like target_read_memory, but specify explicitly that this is a read from
1793 the target's code. This may trigger different cache behavior. */
1796 target_read_code (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1798 /* See comment in target_read_memory about why the request starts at
1799 current_target.beneath. */
1800 if (target_read (current_target
.beneath
, TARGET_OBJECT_CODE_MEMORY
, NULL
,
1801 myaddr
, memaddr
, len
) == len
)
1804 return TARGET_XFER_E_IO
;
1807 /* Write LEN bytes from MYADDR to target memory at address MEMADDR.
1808 Returns either 0 for success or TARGET_XFER_E_IO if any
1809 error occurs. If an error occurs, no guarantee is made about how
1810 much data got written. Callers that can deal with partial writes
1811 should call target_write. */
1814 target_write_memory (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ssize_t len
)
1816 /* See comment in target_read_memory about why the request starts at
1817 current_target.beneath. */
1818 if (target_write (current_target
.beneath
, TARGET_OBJECT_MEMORY
, NULL
,
1819 myaddr
, memaddr
, len
) == len
)
1822 return TARGET_XFER_E_IO
;
1825 /* Write LEN bytes from MYADDR to target raw memory at address
1826 MEMADDR. Returns either 0 for success or TARGET_XFER_E_IO
1827 if any error occurs. If an error occurs, no guarantee is made
1828 about how much data got written. Callers that can deal with
1829 partial writes should call target_write. */
1832 target_write_raw_memory (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ssize_t len
)
1834 /* See comment in target_read_memory about why the request starts at
1835 current_target.beneath. */
1836 if (target_write (current_target
.beneath
, TARGET_OBJECT_RAW_MEMORY
, NULL
,
1837 myaddr
, memaddr
, len
) == len
)
1840 return TARGET_XFER_E_IO
;
1843 /* Fetch the target's memory map. */
1846 target_memory_map (void)
1848 VEC(mem_region_s
) *result
;
1849 struct mem_region
*last_one
, *this_one
;
1851 struct target_ops
*t
;
1854 fprintf_unfiltered (gdb_stdlog
, "target_memory_map ()\n");
1856 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
1857 if (t
->to_memory_map
!= NULL
)
1863 result
= t
->to_memory_map (t
);
1867 qsort (VEC_address (mem_region_s
, result
),
1868 VEC_length (mem_region_s
, result
),
1869 sizeof (struct mem_region
), mem_region_cmp
);
1871 /* Check that regions do not overlap. Simultaneously assign
1872 a numbering for the "mem" commands to use to refer to
1875 for (ix
= 0; VEC_iterate (mem_region_s
, result
, ix
, this_one
); ix
++)
1877 this_one
->number
= ix
;
1879 if (last_one
&& last_one
->hi
> this_one
->lo
)
1881 warning (_("Overlapping regions in memory map: ignoring"));
1882 VEC_free (mem_region_s
, result
);
1885 last_one
= this_one
;
1892 target_flash_erase (ULONGEST address
, LONGEST length
)
1894 struct target_ops
*t
;
1896 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
1897 if (t
->to_flash_erase
!= NULL
)
1900 fprintf_unfiltered (gdb_stdlog
, "target_flash_erase (%s, %s)\n",
1901 hex_string (address
), phex (length
, 0));
1902 t
->to_flash_erase (t
, address
, length
);
1910 target_flash_done (void)
1912 struct target_ops
*t
;
1914 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
1915 if (t
->to_flash_done
!= NULL
)
1918 fprintf_unfiltered (gdb_stdlog
, "target_flash_done\n");
1919 t
->to_flash_done (t
);
1927 show_trust_readonly (struct ui_file
*file
, int from_tty
,
1928 struct cmd_list_element
*c
, const char *value
)
1930 fprintf_filtered (file
,
1931 _("Mode for reading from readonly sections is %s.\n"),
1935 /* More generic transfers. */
1937 static enum target_xfer_status
1938 default_xfer_partial (struct target_ops
*ops
, enum target_object object
,
1939 const char *annex
, gdb_byte
*readbuf
,
1940 const gdb_byte
*writebuf
, ULONGEST offset
, ULONGEST len
,
1941 ULONGEST
*xfered_len
)
1943 if (object
== TARGET_OBJECT_MEMORY
1944 && ops
->deprecated_xfer_memory
!= NULL
)
1945 /* If available, fall back to the target's
1946 "deprecated_xfer_memory" method. */
1951 if (writebuf
!= NULL
)
1953 void *buffer
= xmalloc (len
);
1954 struct cleanup
*cleanup
= make_cleanup (xfree
, buffer
);
1956 memcpy (buffer
, writebuf
, len
);
1957 xfered
= ops
->deprecated_xfer_memory (offset
, buffer
, len
,
1958 1/*write*/, NULL
, ops
);
1959 do_cleanups (cleanup
);
1961 if (readbuf
!= NULL
)
1962 xfered
= ops
->deprecated_xfer_memory (offset
, readbuf
, len
,
1963 0/*read*/, NULL
, ops
);
1966 *xfered_len
= (ULONGEST
) xfered
;
1967 return TARGET_XFER_E_IO
;
1969 else if (xfered
== 0 && errno
== 0)
1970 /* "deprecated_xfer_memory" uses 0, cross checked against
1971 ERRNO as one indication of an error. */
1972 return TARGET_XFER_EOF
;
1974 return TARGET_XFER_E_IO
;
1978 gdb_assert (ops
->beneath
!= NULL
);
1979 return ops
->beneath
->to_xfer_partial (ops
->beneath
, object
, annex
,
1980 readbuf
, writebuf
, offset
, len
,
1985 /* Target vector read/write partial wrapper functions. */
1987 static enum target_xfer_status
1988 target_read_partial (struct target_ops
*ops
,
1989 enum target_object object
,
1990 const char *annex
, gdb_byte
*buf
,
1991 ULONGEST offset
, ULONGEST len
,
1992 ULONGEST
*xfered_len
)
1994 return target_xfer_partial (ops
, object
, annex
, buf
, NULL
, offset
, len
,
1998 static enum target_xfer_status
1999 target_write_partial (struct target_ops
*ops
,
2000 enum target_object object
,
2001 const char *annex
, const gdb_byte
*buf
,
2002 ULONGEST offset
, LONGEST len
, ULONGEST
*xfered_len
)
2004 return target_xfer_partial (ops
, object
, annex
, NULL
, buf
, offset
, len
,
2008 /* Wrappers to perform the full transfer. */
2010 /* For docs on target_read see target.h. */
2013 target_read (struct target_ops
*ops
,
2014 enum target_object object
,
2015 const char *annex
, gdb_byte
*buf
,
2016 ULONGEST offset
, LONGEST len
)
2020 while (xfered
< len
)
2022 ULONGEST xfered_len
;
2023 enum target_xfer_status status
;
2025 status
= target_read_partial (ops
, object
, annex
,
2026 (gdb_byte
*) buf
+ xfered
,
2027 offset
+ xfered
, len
- xfered
,
2030 /* Call an observer, notifying them of the xfer progress? */
2031 if (status
== TARGET_XFER_EOF
)
2033 else if (status
== TARGET_XFER_OK
)
2035 xfered
+= xfered_len
;
2045 /* Assuming that the entire [begin, end) range of memory cannot be
2046 read, try to read whatever subrange is possible to read.
2048 The function returns, in RESULT, either zero or one memory block.
2049 If there's a readable subrange at the beginning, it is completely
2050 read and returned. Any further readable subrange will not be read.
2051 Otherwise, if there's a readable subrange at the end, it will be
2052 completely read and returned. Any readable subranges before it
2053 (obviously, not starting at the beginning), will be ignored. In
2054 other cases -- either no readable subrange, or readable subrange(s)
2055 that is neither at the beginning, or end, nothing is returned.
2057 The purpose of this function is to handle a read across a boundary
2058 of accessible memory in a case when memory map is not available.
2059 The above restrictions are fine for this case, but will give
2060 incorrect results if the memory is 'patchy'. However, supporting
2061 'patchy' memory would require trying to read every single byte,
2062 and it seems unacceptable solution. Explicit memory map is
2063 recommended for this case -- and target_read_memory_robust will
2064 take care of reading multiple ranges then. */
2067 read_whatever_is_readable (struct target_ops
*ops
,
2068 ULONGEST begin
, ULONGEST end
,
2069 VEC(memory_read_result_s
) **result
)
2071 gdb_byte
*buf
= xmalloc (end
- begin
);
2072 ULONGEST current_begin
= begin
;
2073 ULONGEST current_end
= end
;
2075 memory_read_result_s r
;
2076 ULONGEST xfered_len
;
2078 /* If we previously failed to read 1 byte, nothing can be done here. */
2079 if (end
- begin
<= 1)
2085 /* Check that either first or the last byte is readable, and give up
2086 if not. This heuristic is meant to permit reading accessible memory
2087 at the boundary of accessible region. */
2088 if (target_read_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2089 buf
, begin
, 1, &xfered_len
) == TARGET_XFER_OK
)
2094 else if (target_read_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2095 buf
+ (end
-begin
) - 1, end
- 1, 1,
2096 &xfered_len
) == TARGET_XFER_OK
)
2107 /* Loop invariant is that the [current_begin, current_end) was previously
2108 found to be not readable as a whole.
2110 Note loop condition -- if the range has 1 byte, we can't divide the range
2111 so there's no point trying further. */
2112 while (current_end
- current_begin
> 1)
2114 ULONGEST first_half_begin
, first_half_end
;
2115 ULONGEST second_half_begin
, second_half_end
;
2117 ULONGEST middle
= current_begin
+ (current_end
- current_begin
)/2;
2121 first_half_begin
= current_begin
;
2122 first_half_end
= middle
;
2123 second_half_begin
= middle
;
2124 second_half_end
= current_end
;
2128 first_half_begin
= middle
;
2129 first_half_end
= current_end
;
2130 second_half_begin
= current_begin
;
2131 second_half_end
= middle
;
2134 xfer
= target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2135 buf
+ (first_half_begin
- begin
),
2137 first_half_end
- first_half_begin
);
2139 if (xfer
== first_half_end
- first_half_begin
)
2141 /* This half reads up fine. So, the error must be in the
2143 current_begin
= second_half_begin
;
2144 current_end
= second_half_end
;
2148 /* This half is not readable. Because we've tried one byte, we
2149 know some part of this half if actually redable. Go to the next
2150 iteration to divide again and try to read.
2152 We don't handle the other half, because this function only tries
2153 to read a single readable subrange. */
2154 current_begin
= first_half_begin
;
2155 current_end
= first_half_end
;
2161 /* The [begin, current_begin) range has been read. */
2163 r
.end
= current_begin
;
2168 /* The [current_end, end) range has been read. */
2169 LONGEST rlen
= end
- current_end
;
2171 r
.data
= xmalloc (rlen
);
2172 memcpy (r
.data
, buf
+ current_end
- begin
, rlen
);
2173 r
.begin
= current_end
;
2177 VEC_safe_push(memory_read_result_s
, (*result
), &r
);
2181 free_memory_read_result_vector (void *x
)
2183 VEC(memory_read_result_s
) *v
= x
;
2184 memory_read_result_s
*current
;
2187 for (ix
= 0; VEC_iterate (memory_read_result_s
, v
, ix
, current
); ++ix
)
2189 xfree (current
->data
);
2191 VEC_free (memory_read_result_s
, v
);
2194 VEC(memory_read_result_s
) *
2195 read_memory_robust (struct target_ops
*ops
, ULONGEST offset
, LONGEST len
)
2197 VEC(memory_read_result_s
) *result
= 0;
2200 while (xfered
< len
)
2202 struct mem_region
*region
= lookup_mem_region (offset
+ xfered
);
2205 /* If there is no explicit region, a fake one should be created. */
2206 gdb_assert (region
);
2208 if (region
->hi
== 0)
2209 rlen
= len
- xfered
;
2211 rlen
= region
->hi
- offset
;
2213 if (region
->attrib
.mode
== MEM_NONE
|| region
->attrib
.mode
== MEM_WO
)
2215 /* Cannot read this region. Note that we can end up here only
2216 if the region is explicitly marked inaccessible, or
2217 'inaccessible-by-default' is in effect. */
2222 LONGEST to_read
= min (len
- xfered
, rlen
);
2223 gdb_byte
*buffer
= (gdb_byte
*)xmalloc (to_read
);
2225 LONGEST xfer
= target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2226 (gdb_byte
*) buffer
,
2227 offset
+ xfered
, to_read
);
2228 /* Call an observer, notifying them of the xfer progress? */
2231 /* Got an error reading full chunk. See if maybe we can read
2234 read_whatever_is_readable (ops
, offset
+ xfered
,
2235 offset
+ xfered
+ to_read
, &result
);
2240 struct memory_read_result r
;
2242 r
.begin
= offset
+ xfered
;
2243 r
.end
= r
.begin
+ xfer
;
2244 VEC_safe_push (memory_read_result_s
, result
, &r
);
2254 /* An alternative to target_write with progress callbacks. */
2257 target_write_with_progress (struct target_ops
*ops
,
2258 enum target_object object
,
2259 const char *annex
, const gdb_byte
*buf
,
2260 ULONGEST offset
, LONGEST len
,
2261 void (*progress
) (ULONGEST
, void *), void *baton
)
2265 /* Give the progress callback a chance to set up. */
2267 (*progress
) (0, baton
);
2269 while (xfered
< len
)
2271 ULONGEST xfered_len
;
2272 enum target_xfer_status status
;
2274 status
= target_write_partial (ops
, object
, annex
,
2275 (gdb_byte
*) buf
+ xfered
,
2276 offset
+ xfered
, len
- xfered
,
2279 if (status
== TARGET_XFER_EOF
)
2281 if (TARGET_XFER_STATUS_ERROR_P (status
))
2284 gdb_assert (status
== TARGET_XFER_OK
);
2286 (*progress
) (xfered_len
, baton
);
2288 xfered
+= xfered_len
;
2294 /* For docs on target_write see target.h. */
2297 target_write (struct target_ops
*ops
,
2298 enum target_object object
,
2299 const char *annex
, const gdb_byte
*buf
,
2300 ULONGEST offset
, LONGEST len
)
2302 return target_write_with_progress (ops
, object
, annex
, buf
, offset
, len
,
2306 /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return
2307 the size of the transferred data. PADDING additional bytes are
2308 available in *BUF_P. This is a helper function for
2309 target_read_alloc; see the declaration of that function for more
2313 target_read_alloc_1 (struct target_ops
*ops
, enum target_object object
,
2314 const char *annex
, gdb_byte
**buf_p
, int padding
)
2316 size_t buf_alloc
, buf_pos
;
2319 /* This function does not have a length parameter; it reads the
2320 entire OBJECT). Also, it doesn't support objects fetched partly
2321 from one target and partly from another (in a different stratum,
2322 e.g. a core file and an executable). Both reasons make it
2323 unsuitable for reading memory. */
2324 gdb_assert (object
!= TARGET_OBJECT_MEMORY
);
2326 /* Start by reading up to 4K at a time. The target will throttle
2327 this number down if necessary. */
2329 buf
= xmalloc (buf_alloc
);
2333 ULONGEST xfered_len
;
2334 enum target_xfer_status status
;
2336 status
= target_read_partial (ops
, object
, annex
, &buf
[buf_pos
],
2337 buf_pos
, buf_alloc
- buf_pos
- padding
,
2340 if (status
== TARGET_XFER_EOF
)
2342 /* Read all there was. */
2349 else if (status
!= TARGET_XFER_OK
)
2351 /* An error occurred. */
2353 return TARGET_XFER_E_IO
;
2356 buf_pos
+= xfered_len
;
2358 /* If the buffer is filling up, expand it. */
2359 if (buf_alloc
< buf_pos
* 2)
2362 buf
= xrealloc (buf
, buf_alloc
);
2369 /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return
2370 the size of the transferred data. See the declaration in "target.h"
2371 function for more information about the return value. */
2374 target_read_alloc (struct target_ops
*ops
, enum target_object object
,
2375 const char *annex
, gdb_byte
**buf_p
)
2377 return target_read_alloc_1 (ops
, object
, annex
, buf_p
, 0);
2380 /* Read OBJECT/ANNEX using OPS. The result is NUL-terminated and
2381 returned as a string, allocated using xmalloc. If an error occurs
2382 or the transfer is unsupported, NULL is returned. Empty objects
2383 are returned as allocated but empty strings. A warning is issued
2384 if the result contains any embedded NUL bytes. */
2387 target_read_stralloc (struct target_ops
*ops
, enum target_object object
,
2392 LONGEST i
, transferred
;
2394 transferred
= target_read_alloc_1 (ops
, object
, annex
, &buffer
, 1);
2395 bufstr
= (char *) buffer
;
2397 if (transferred
< 0)
2400 if (transferred
== 0)
2401 return xstrdup ("");
2403 bufstr
[transferred
] = 0;
2405 /* Check for embedded NUL bytes; but allow trailing NULs. */
2406 for (i
= strlen (bufstr
); i
< transferred
; i
++)
2409 warning (_("target object %d, annex %s, "
2410 "contained unexpected null characters"),
2411 (int) object
, annex
? annex
: "(none)");
2418 /* Memory transfer methods. */
2421 get_target_memory (struct target_ops
*ops
, CORE_ADDR addr
, gdb_byte
*buf
,
2424 /* This method is used to read from an alternate, non-current
2425 target. This read must bypass the overlay support (as symbols
2426 don't match this target), and GDB's internal cache (wrong cache
2427 for this target). */
2428 if (target_read (ops
, TARGET_OBJECT_RAW_MEMORY
, NULL
, buf
, addr
, len
)
2430 memory_error (TARGET_XFER_E_IO
, addr
);
2434 get_target_memory_unsigned (struct target_ops
*ops
, CORE_ADDR addr
,
2435 int len
, enum bfd_endian byte_order
)
2437 gdb_byte buf
[sizeof (ULONGEST
)];
2439 gdb_assert (len
<= sizeof (buf
));
2440 get_target_memory (ops
, addr
, buf
, len
);
2441 return extract_unsigned_integer (buf
, len
, byte_order
);
2447 target_insert_breakpoint (struct gdbarch
*gdbarch
,
2448 struct bp_target_info
*bp_tgt
)
2450 if (!may_insert_breakpoints
)
2452 warning (_("May not insert breakpoints"));
2456 return current_target
.to_insert_breakpoint (¤t_target
,
2463 target_remove_breakpoint (struct gdbarch
*gdbarch
,
2464 struct bp_target_info
*bp_tgt
)
2466 /* This is kind of a weird case to handle, but the permission might
2467 have been changed after breakpoints were inserted - in which case
2468 we should just take the user literally and assume that any
2469 breakpoints should be left in place. */
2470 if (!may_insert_breakpoints
)
2472 warning (_("May not remove breakpoints"));
2476 return current_target
.to_remove_breakpoint (¤t_target
,
2481 target_info (char *args
, int from_tty
)
2483 struct target_ops
*t
;
2484 int has_all_mem
= 0;
2486 if (symfile_objfile
!= NULL
)
2487 printf_unfiltered (_("Symbols from \"%s\".\n"),
2488 objfile_name (symfile_objfile
));
2490 for (t
= target_stack
; t
!= NULL
; t
= t
->beneath
)
2492 if (!(*t
->to_has_memory
) (t
))
2495 if ((int) (t
->to_stratum
) <= (int) dummy_stratum
)
2498 printf_unfiltered (_("\tWhile running this, "
2499 "GDB does not access memory from...\n"));
2500 printf_unfiltered ("%s:\n", t
->to_longname
);
2501 (t
->to_files_info
) (t
);
2502 has_all_mem
= (*t
->to_has_all_memory
) (t
);
2506 /* This function is called before any new inferior is created, e.g.
2507 by running a program, attaching, or connecting to a target.
2508 It cleans up any state from previous invocations which might
2509 change between runs. This is a subset of what target_preopen
2510 resets (things which might change between targets). */
2513 target_pre_inferior (int from_tty
)
2515 /* Clear out solib state. Otherwise the solib state of the previous
2516 inferior might have survived and is entirely wrong for the new
2517 target. This has been observed on GNU/Linux using glibc 2.3. How
2529 Cannot access memory at address 0xdeadbeef
2532 /* In some OSs, the shared library list is the same/global/shared
2533 across inferiors. If code is shared between processes, so are
2534 memory regions and features. */
2535 if (!gdbarch_has_global_solist (target_gdbarch ()))
2537 no_shared_libraries (NULL
, from_tty
);
2539 invalidate_target_mem_regions ();
2541 target_clear_description ();
2544 agent_capability_invalidate ();
2547 /* Callback for iterate_over_inferiors. Gets rid of the given
2551 dispose_inferior (struct inferior
*inf
, void *args
)
2553 struct thread_info
*thread
;
2555 thread
= any_thread_of_process (inf
->pid
);
2558 switch_to_thread (thread
->ptid
);
2560 /* Core inferiors actually should be detached, not killed. */
2561 if (target_has_execution
)
2564 target_detach (NULL
, 0);
2570 /* This is to be called by the open routine before it does
2574 target_preopen (int from_tty
)
2578 if (have_inferiors ())
2581 || !have_live_inferiors ()
2582 || query (_("A program is being debugged already. Kill it? ")))
2583 iterate_over_inferiors (dispose_inferior
, NULL
);
2585 error (_("Program not killed."));
2588 /* Calling target_kill may remove the target from the stack. But if
2589 it doesn't (which seems like a win for UDI), remove it now. */
2590 /* Leave the exec target, though. The user may be switching from a
2591 live process to a core of the same program. */
2592 pop_all_targets_above (file_stratum
);
2594 target_pre_inferior (from_tty
);
2597 /* Detach a target after doing deferred register stores. */
2600 target_detach (const char *args
, int from_tty
)
2602 struct target_ops
* t
;
2604 if (gdbarch_has_global_breakpoints (target_gdbarch ()))
2605 /* Don't remove global breakpoints here. They're removed on
2606 disconnection from the target. */
2609 /* If we're in breakpoints-always-inserted mode, have to remove
2610 them before detaching. */
2611 remove_breakpoints_pid (ptid_get_pid (inferior_ptid
));
2613 prepare_for_detach ();
2615 current_target
.to_detach (¤t_target
, args
, from_tty
);
2617 fprintf_unfiltered (gdb_stdlog
, "target_detach (%s, %d)\n",
2622 target_disconnect (char *args
, int from_tty
)
2624 struct target_ops
*t
;
2626 /* If we're in breakpoints-always-inserted mode or if breakpoints
2627 are global across processes, we have to remove them before
2629 remove_breakpoints ();
2631 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2632 if (t
->to_disconnect
!= NULL
)
2635 fprintf_unfiltered (gdb_stdlog
, "target_disconnect (%s, %d)\n",
2637 t
->to_disconnect (t
, args
, from_tty
);
2645 target_wait (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
2647 struct target_ops
*t
;
2648 ptid_t retval
= (current_target
.to_wait
) (¤t_target
, ptid
,
2653 char *status_string
;
2654 char *options_string
;
2656 status_string
= target_waitstatus_to_string (status
);
2657 options_string
= target_options_to_string (options
);
2658 fprintf_unfiltered (gdb_stdlog
,
2659 "target_wait (%d, status, options={%s})"
2661 ptid_get_pid (ptid
), options_string
,
2662 ptid_get_pid (retval
), status_string
);
2663 xfree (status_string
);
2664 xfree (options_string
);
2671 target_pid_to_str (ptid_t ptid
)
2673 struct target_ops
*t
;
2675 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2677 if (t
->to_pid_to_str
!= NULL
)
2678 return (*t
->to_pid_to_str
) (t
, ptid
);
2681 return normal_pid_to_str (ptid
);
2685 target_thread_name (struct thread_info
*info
)
2687 struct target_ops
*t
;
2689 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2691 if (t
->to_thread_name
!= NULL
)
2692 return (*t
->to_thread_name
) (t
, info
);
2699 target_resume (ptid_t ptid
, int step
, enum gdb_signal signal
)
2701 struct target_ops
*t
;
2703 target_dcache_invalidate ();
2705 current_target
.to_resume (¤t_target
, ptid
, step
, signal
);
2707 fprintf_unfiltered (gdb_stdlog
, "target_resume (%d, %s, %s)\n",
2708 ptid_get_pid (ptid
),
2709 step
? "step" : "continue",
2710 gdb_signal_to_name (signal
));
2712 registers_changed_ptid (ptid
);
2713 set_executing (ptid
, 1);
2714 set_running (ptid
, 1);
2715 clear_inline_frame_state (ptid
);
2719 target_pass_signals (int numsigs
, unsigned char *pass_signals
)
2721 struct target_ops
*t
;
2723 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2725 if (t
->to_pass_signals
!= NULL
)
2731 fprintf_unfiltered (gdb_stdlog
, "target_pass_signals (%d, {",
2734 for (i
= 0; i
< numsigs
; i
++)
2735 if (pass_signals
[i
])
2736 fprintf_unfiltered (gdb_stdlog
, " %s",
2737 gdb_signal_to_name (i
));
2739 fprintf_unfiltered (gdb_stdlog
, " })\n");
2742 (*t
->to_pass_signals
) (t
, numsigs
, pass_signals
);
2749 target_program_signals (int numsigs
, unsigned char *program_signals
)
2751 struct target_ops
*t
;
2753 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2755 if (t
->to_program_signals
!= NULL
)
2761 fprintf_unfiltered (gdb_stdlog
, "target_program_signals (%d, {",
2764 for (i
= 0; i
< numsigs
; i
++)
2765 if (program_signals
[i
])
2766 fprintf_unfiltered (gdb_stdlog
, " %s",
2767 gdb_signal_to_name (i
));
2769 fprintf_unfiltered (gdb_stdlog
, " })\n");
2772 (*t
->to_program_signals
) (t
, numsigs
, program_signals
);
2778 /* Look through the list of possible targets for a target that can
2782 target_follow_fork (int follow_child
, int detach_fork
)
2784 struct target_ops
*t
;
2786 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2788 if (t
->to_follow_fork
!= NULL
)
2790 int retval
= t
->to_follow_fork (t
, follow_child
, detach_fork
);
2793 fprintf_unfiltered (gdb_stdlog
,
2794 "target_follow_fork (%d, %d) = %d\n",
2795 follow_child
, detach_fork
, retval
);
2800 /* Some target returned a fork event, but did not know how to follow it. */
2801 internal_error (__FILE__
, __LINE__
,
2802 _("could not find a target to follow fork"));
2806 target_mourn_inferior (void)
2808 struct target_ops
*t
;
2810 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2812 if (t
->to_mourn_inferior
!= NULL
)
2814 t
->to_mourn_inferior (t
);
2816 fprintf_unfiltered (gdb_stdlog
, "target_mourn_inferior ()\n");
2818 /* We no longer need to keep handles on any of the object files.
2819 Make sure to release them to avoid unnecessarily locking any
2820 of them while we're not actually debugging. */
2821 bfd_cache_close_all ();
2827 internal_error (__FILE__
, __LINE__
,
2828 _("could not find a target to follow mourn inferior"));
2831 /* Look for a target which can describe architectural features, starting
2832 from TARGET. If we find one, return its description. */
2834 const struct target_desc
*
2835 target_read_description (struct target_ops
*target
)
2837 struct target_ops
*t
;
2839 for (t
= target
; t
!= NULL
; t
= t
->beneath
)
2840 if (t
->to_read_description
!= NULL
)
2842 const struct target_desc
*tdesc
;
2844 tdesc
= t
->to_read_description (t
);
2852 /* The default implementation of to_search_memory.
2853 This implements a basic search of memory, reading target memory and
2854 performing the search here (as opposed to performing the search in on the
2855 target side with, for example, gdbserver). */
2858 simple_search_memory (struct target_ops
*ops
,
2859 CORE_ADDR start_addr
, ULONGEST search_space_len
,
2860 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2861 CORE_ADDR
*found_addrp
)
2863 /* NOTE: also defined in find.c testcase. */
2864 #define SEARCH_CHUNK_SIZE 16000
2865 const unsigned chunk_size
= SEARCH_CHUNK_SIZE
;
2866 /* Buffer to hold memory contents for searching. */
2867 gdb_byte
*search_buf
;
2868 unsigned search_buf_size
;
2869 struct cleanup
*old_cleanups
;
2871 search_buf_size
= chunk_size
+ pattern_len
- 1;
2873 /* No point in trying to allocate a buffer larger than the search space. */
2874 if (search_space_len
< search_buf_size
)
2875 search_buf_size
= search_space_len
;
2877 search_buf
= malloc (search_buf_size
);
2878 if (search_buf
== NULL
)
2879 error (_("Unable to allocate memory to perform the search."));
2880 old_cleanups
= make_cleanup (free_current_contents
, &search_buf
);
2882 /* Prime the search buffer. */
2884 if (target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2885 search_buf
, start_addr
, search_buf_size
) != search_buf_size
)
2887 warning (_("Unable to access %s bytes of target "
2888 "memory at %s, halting search."),
2889 pulongest (search_buf_size
), hex_string (start_addr
));
2890 do_cleanups (old_cleanups
);
2894 /* Perform the search.
2896 The loop is kept simple by allocating [N + pattern-length - 1] bytes.
2897 When we've scanned N bytes we copy the trailing bytes to the start and
2898 read in another N bytes. */
2900 while (search_space_len
>= pattern_len
)
2902 gdb_byte
*found_ptr
;
2903 unsigned nr_search_bytes
= min (search_space_len
, search_buf_size
);
2905 found_ptr
= memmem (search_buf
, nr_search_bytes
,
2906 pattern
, pattern_len
);
2908 if (found_ptr
!= NULL
)
2910 CORE_ADDR found_addr
= start_addr
+ (found_ptr
- search_buf
);
2912 *found_addrp
= found_addr
;
2913 do_cleanups (old_cleanups
);
2917 /* Not found in this chunk, skip to next chunk. */
2919 /* Don't let search_space_len wrap here, it's unsigned. */
2920 if (search_space_len
>= chunk_size
)
2921 search_space_len
-= chunk_size
;
2923 search_space_len
= 0;
2925 if (search_space_len
>= pattern_len
)
2927 unsigned keep_len
= search_buf_size
- chunk_size
;
2928 CORE_ADDR read_addr
= start_addr
+ chunk_size
+ keep_len
;
2931 /* Copy the trailing part of the previous iteration to the front
2932 of the buffer for the next iteration. */
2933 gdb_assert (keep_len
== pattern_len
- 1);
2934 memcpy (search_buf
, search_buf
+ chunk_size
, keep_len
);
2936 nr_to_read
= min (search_space_len
- keep_len
, chunk_size
);
2938 if (target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2939 search_buf
+ keep_len
, read_addr
,
2940 nr_to_read
) != nr_to_read
)
2942 warning (_("Unable to access %s bytes of target "
2943 "memory at %s, halting search."),
2944 plongest (nr_to_read
),
2945 hex_string (read_addr
));
2946 do_cleanups (old_cleanups
);
2950 start_addr
+= chunk_size
;
2956 do_cleanups (old_cleanups
);
2960 /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the
2961 sequence of bytes in PATTERN with length PATTERN_LEN.
2963 The result is 1 if found, 0 if not found, and -1 if there was an error
2964 requiring halting of the search (e.g. memory read error).
2965 If the pattern is found the address is recorded in FOUND_ADDRP. */
2968 target_search_memory (CORE_ADDR start_addr
, ULONGEST search_space_len
,
2969 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2970 CORE_ADDR
*found_addrp
)
2972 struct target_ops
*t
;
2975 /* We don't use INHERIT to set current_target.to_search_memory,
2976 so we have to scan the target stack and handle targetdebug
2980 fprintf_unfiltered (gdb_stdlog
, "target_search_memory (%s, ...)\n",
2981 hex_string (start_addr
));
2983 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2984 if (t
->to_search_memory
!= NULL
)
2989 found
= t
->to_search_memory (t
, start_addr
, search_space_len
,
2990 pattern
, pattern_len
, found_addrp
);
2994 /* If a special version of to_search_memory isn't available, use the
2996 found
= simple_search_memory (current_target
.beneath
,
2997 start_addr
, search_space_len
,
2998 pattern
, pattern_len
, found_addrp
);
3002 fprintf_unfiltered (gdb_stdlog
, " = %d\n", found
);
3007 /* Look through the currently pushed targets. If none of them will
3008 be able to restart the currently running process, issue an error
3012 target_require_runnable (void)
3014 struct target_ops
*t
;
3016 for (t
= target_stack
; t
!= NULL
; t
= t
->beneath
)
3018 /* If this target knows how to create a new program, then
3019 assume we will still be able to after killing the current
3020 one. Either killing and mourning will not pop T, or else
3021 find_default_run_target will find it again. */
3022 if (t
->to_create_inferior
!= NULL
)
3025 /* Do not worry about thread_stratum targets that can not
3026 create inferiors. Assume they will be pushed again if
3027 necessary, and continue to the process_stratum. */
3028 if (t
->to_stratum
== thread_stratum
3029 || t
->to_stratum
== arch_stratum
)
3032 error (_("The \"%s\" target does not support \"run\". "
3033 "Try \"help target\" or \"continue\"."),
3037 /* This function is only called if the target is running. In that
3038 case there should have been a process_stratum target and it
3039 should either know how to create inferiors, or not... */
3040 internal_error (__FILE__
, __LINE__
, _("No targets found"));
3043 /* Look through the list of possible targets for a target that can
3044 execute a run or attach command without any other data. This is
3045 used to locate the default process stratum.
3047 If DO_MESG is not NULL, the result is always valid (error() is
3048 called for errors); else, return NULL on error. */
3050 static struct target_ops
*
3051 find_default_run_target (char *do_mesg
)
3053 struct target_ops
**t
;
3054 struct target_ops
*runable
= NULL
;
3059 for (t
= target_structs
; t
< target_structs
+ target_struct_size
;
3062 if ((*t
)->to_can_run
&& target_can_run (*t
))
3072 error (_("Don't know how to %s. Try \"help target\"."), do_mesg
);
3081 find_default_attach (struct target_ops
*ops
, char *args
, int from_tty
)
3083 struct target_ops
*t
;
3085 t
= find_default_run_target ("attach");
3086 (t
->to_attach
) (t
, args
, from_tty
);
3091 find_default_create_inferior (struct target_ops
*ops
,
3092 char *exec_file
, char *allargs
, char **env
,
3095 struct target_ops
*t
;
3097 t
= find_default_run_target ("run");
3098 (t
->to_create_inferior
) (t
, exec_file
, allargs
, env
, from_tty
);
3103 find_default_can_async_p (struct target_ops
*ignore
)
3105 struct target_ops
*t
;
3107 /* This may be called before the target is pushed on the stack;
3108 look for the default process stratum. If there's none, gdb isn't
3109 configured with a native debugger, and target remote isn't
3111 t
= find_default_run_target (NULL
);
3112 if (t
&& t
->to_can_async_p
!= delegate_can_async_p
)
3113 return (t
->to_can_async_p
) (t
);
3118 find_default_is_async_p (struct target_ops
*ignore
)
3120 struct target_ops
*t
;
3122 /* This may be called before the target is pushed on the stack;
3123 look for the default process stratum. If there's none, gdb isn't
3124 configured with a native debugger, and target remote isn't
3126 t
= find_default_run_target (NULL
);
3127 if (t
&& t
->to_is_async_p
!= delegate_is_async_p
)
3128 return (t
->to_is_async_p
) (t
);
3133 find_default_supports_non_stop (struct target_ops
*self
)
3135 struct target_ops
*t
;
3137 t
= find_default_run_target (NULL
);
3138 if (t
&& t
->to_supports_non_stop
)
3139 return (t
->to_supports_non_stop
) (t
);
3144 target_supports_non_stop (void)
3146 struct target_ops
*t
;
3148 for (t
= ¤t_target
; t
!= NULL
; t
= t
->beneath
)
3149 if (t
->to_supports_non_stop
)
3150 return t
->to_supports_non_stop (t
);
3155 /* Implement the "info proc" command. */
3158 target_info_proc (char *args
, enum info_proc_what what
)
3160 struct target_ops
*t
;
3162 /* If we're already connected to something that can get us OS
3163 related data, use it. Otherwise, try using the native
3165 if (current_target
.to_stratum
>= process_stratum
)
3166 t
= current_target
.beneath
;
3168 t
= find_default_run_target (NULL
);
3170 for (; t
!= NULL
; t
= t
->beneath
)
3172 if (t
->to_info_proc
!= NULL
)
3174 t
->to_info_proc (t
, args
, what
);
3177 fprintf_unfiltered (gdb_stdlog
,
3178 "target_info_proc (\"%s\", %d)\n", args
, what
);
3188 find_default_supports_disable_randomization (struct target_ops
*self
)
3190 struct target_ops
*t
;
3192 t
= find_default_run_target (NULL
);
3193 if (t
&& t
->to_supports_disable_randomization
)
3194 return (t
->to_supports_disable_randomization
) (t
);
3199 target_supports_disable_randomization (void)
3201 struct target_ops
*t
;
3203 for (t
= ¤t_target
; t
!= NULL
; t
= t
->beneath
)
3204 if (t
->to_supports_disable_randomization
)
3205 return t
->to_supports_disable_randomization (t
);
3211 target_get_osdata (const char *type
)
3213 struct target_ops
*t
;
3215 /* If we're already connected to something that can get us OS
3216 related data, use it. Otherwise, try using the native
3218 if (current_target
.to_stratum
>= process_stratum
)
3219 t
= current_target
.beneath
;
3221 t
= find_default_run_target ("get OS data");
3226 return target_read_stralloc (t
, TARGET_OBJECT_OSDATA
, type
);
3229 /* Determine the current address space of thread PTID. */
3231 struct address_space
*
3232 target_thread_address_space (ptid_t ptid
)
3234 struct address_space
*aspace
;
3235 struct inferior
*inf
;
3236 struct target_ops
*t
;
3238 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3240 if (t
->to_thread_address_space
!= NULL
)
3242 aspace
= t
->to_thread_address_space (t
, ptid
);
3243 gdb_assert (aspace
);
3246 fprintf_unfiltered (gdb_stdlog
,
3247 "target_thread_address_space (%s) = %d\n",
3248 target_pid_to_str (ptid
),
3249 address_space_num (aspace
));
3254 /* Fall-back to the "main" address space of the inferior. */
3255 inf
= find_inferior_pid (ptid_get_pid (ptid
));
3257 if (inf
== NULL
|| inf
->aspace
== NULL
)
3258 internal_error (__FILE__
, __LINE__
,
3259 _("Can't determine the current "
3260 "address space of thread %s\n"),
3261 target_pid_to_str (ptid
));
3267 /* Target file operations. */
3269 static struct target_ops
*
3270 default_fileio_target (void)
3272 /* If we're already connected to something that can perform
3273 file I/O, use it. Otherwise, try using the native target. */
3274 if (current_target
.to_stratum
>= process_stratum
)
3275 return current_target
.beneath
;
3277 return find_default_run_target ("file I/O");
3280 /* Open FILENAME on the target, using FLAGS and MODE. Return a
3281 target file descriptor, or -1 if an error occurs (and set
3284 target_fileio_open (const char *filename
, int flags
, int mode
,
3287 struct target_ops
*t
;
3289 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
3291 if (t
->to_fileio_open
!= NULL
)
3293 int fd
= t
->to_fileio_open (t
, filename
, flags
, mode
, target_errno
);
3296 fprintf_unfiltered (gdb_stdlog
,
3297 "target_fileio_open (%s,0x%x,0%o) = %d (%d)\n",
3298 filename
, flags
, mode
,
3299 fd
, fd
!= -1 ? 0 : *target_errno
);
3304 *target_errno
= FILEIO_ENOSYS
;
3308 /* Write up to LEN bytes from WRITE_BUF to FD on the target.
3309 Return the number of bytes written, or -1 if an error occurs
3310 (and set *TARGET_ERRNO). */
3312 target_fileio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
3313 ULONGEST offset
, int *target_errno
)
3315 struct target_ops
*t
;
3317 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
3319 if (t
->to_fileio_pwrite
!= NULL
)
3321 int ret
= t
->to_fileio_pwrite (t
, fd
, write_buf
, len
, offset
,
3325 fprintf_unfiltered (gdb_stdlog
,
3326 "target_fileio_pwrite (%d,...,%d,%s) "
3328 fd
, len
, pulongest (offset
),
3329 ret
, ret
!= -1 ? 0 : *target_errno
);
3334 *target_errno
= FILEIO_ENOSYS
;
3338 /* Read up to LEN bytes FD on the target into READ_BUF.
3339 Return the number of bytes read, or -1 if an error occurs
3340 (and set *TARGET_ERRNO). */
3342 target_fileio_pread (int fd
, gdb_byte
*read_buf
, int len
,
3343 ULONGEST offset
, int *target_errno
)
3345 struct target_ops
*t
;
3347 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
3349 if (t
->to_fileio_pread
!= NULL
)
3351 int ret
= t
->to_fileio_pread (t
, fd
, read_buf
, len
, offset
,
3355 fprintf_unfiltered (gdb_stdlog
,
3356 "target_fileio_pread (%d,...,%d,%s) "
3358 fd
, len
, pulongest (offset
),
3359 ret
, ret
!= -1 ? 0 : *target_errno
);
3364 *target_errno
= FILEIO_ENOSYS
;
3368 /* Close FD on the target. Return 0, or -1 if an error occurs
3369 (and set *TARGET_ERRNO). */
3371 target_fileio_close (int fd
, int *target_errno
)
3373 struct target_ops
*t
;
3375 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
3377 if (t
->to_fileio_close
!= NULL
)
3379 int ret
= t
->to_fileio_close (t
, fd
, target_errno
);
3382 fprintf_unfiltered (gdb_stdlog
,
3383 "target_fileio_close (%d) = %d (%d)\n",
3384 fd
, ret
, ret
!= -1 ? 0 : *target_errno
);
3389 *target_errno
= FILEIO_ENOSYS
;
3393 /* Unlink FILENAME on the target. Return 0, or -1 if an error
3394 occurs (and set *TARGET_ERRNO). */
3396 target_fileio_unlink (const char *filename
, int *target_errno
)
3398 struct target_ops
*t
;
3400 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
3402 if (t
->to_fileio_unlink
!= NULL
)
3404 int ret
= t
->to_fileio_unlink (t
, filename
, target_errno
);
3407 fprintf_unfiltered (gdb_stdlog
,
3408 "target_fileio_unlink (%s) = %d (%d)\n",
3409 filename
, ret
, ret
!= -1 ? 0 : *target_errno
);
3414 *target_errno
= FILEIO_ENOSYS
;
3418 /* Read value of symbolic link FILENAME on the target. Return a
3419 null-terminated string allocated via xmalloc, or NULL if an error
3420 occurs (and set *TARGET_ERRNO). */
3422 target_fileio_readlink (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_readlink
!= NULL
)
3430 char *ret
= t
->to_fileio_readlink (t
, filename
, target_errno
);
3433 fprintf_unfiltered (gdb_stdlog
,
3434 "target_fileio_readlink (%s) = %s (%d)\n",
3435 filename
, ret
? ret
: "(nil)",
3436 ret
? 0 : *target_errno
);
3441 *target_errno
= FILEIO_ENOSYS
;
3446 target_fileio_close_cleanup (void *opaque
)
3448 int fd
= *(int *) opaque
;
3451 target_fileio_close (fd
, &target_errno
);
3454 /* Read target file FILENAME. Store the result in *BUF_P and
3455 return the size of the transferred data. PADDING additional bytes are
3456 available in *BUF_P. This is a helper function for
3457 target_fileio_read_alloc; see the declaration of that function for more
3461 target_fileio_read_alloc_1 (const char *filename
,
3462 gdb_byte
**buf_p
, int padding
)
3464 struct cleanup
*close_cleanup
;
3465 size_t buf_alloc
, buf_pos
;
3471 fd
= target_fileio_open (filename
, FILEIO_O_RDONLY
, 0700, &target_errno
);
3475 close_cleanup
= make_cleanup (target_fileio_close_cleanup
, &fd
);
3477 /* Start by reading up to 4K at a time. The target will throttle
3478 this number down if necessary. */
3480 buf
= xmalloc (buf_alloc
);
3484 n
= target_fileio_pread (fd
, &buf
[buf_pos
],
3485 buf_alloc
- buf_pos
- padding
, buf_pos
,
3489 /* An error occurred. */
3490 do_cleanups (close_cleanup
);
3496 /* Read all there was. */
3497 do_cleanups (close_cleanup
);
3507 /* If the buffer is filling up, expand it. */
3508 if (buf_alloc
< buf_pos
* 2)
3511 buf
= xrealloc (buf
, buf_alloc
);
3518 /* Read target file FILENAME. Store the result in *BUF_P and return
3519 the size of the transferred data. See the declaration in "target.h"
3520 function for more information about the return value. */
3523 target_fileio_read_alloc (const char *filename
, gdb_byte
**buf_p
)
3525 return target_fileio_read_alloc_1 (filename
, buf_p
, 0);
3528 /* Read target file FILENAME. The result is NUL-terminated and
3529 returned as a string, allocated using xmalloc. If an error occurs
3530 or the transfer is unsupported, NULL is returned. Empty objects
3531 are returned as allocated but empty strings. A warning is issued
3532 if the result contains any embedded NUL bytes. */
3535 target_fileio_read_stralloc (const char *filename
)
3539 LONGEST i
, transferred
;
3541 transferred
= target_fileio_read_alloc_1 (filename
, &buffer
, 1);
3542 bufstr
= (char *) buffer
;
3544 if (transferred
< 0)
3547 if (transferred
== 0)
3548 return xstrdup ("");
3550 bufstr
[transferred
] = 0;
3552 /* Check for embedded NUL bytes; but allow trailing NULs. */
3553 for (i
= strlen (bufstr
); i
< transferred
; i
++)
3556 warning (_("target file %s "
3557 "contained unexpected null characters"),
3567 default_region_ok_for_hw_watchpoint (struct target_ops
*self
,
3568 CORE_ADDR addr
, int len
)
3570 return (len
<= gdbarch_ptr_bit (target_gdbarch ()) / TARGET_CHAR_BIT
);
3574 default_watchpoint_addr_within_range (struct target_ops
*target
,
3576 CORE_ADDR start
, int length
)
3578 return addr
>= start
&& addr
< start
+ length
;
3581 static struct gdbarch
*
3582 default_thread_architecture (struct target_ops
*ops
, ptid_t ptid
)
3584 return target_gdbarch ();
3600 return_minus_one (void)
3612 * Find the next target down the stack from the specified target.
3616 find_target_beneath (struct target_ops
*t
)
3624 find_target_at (enum strata stratum
)
3626 struct target_ops
*t
;
3628 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3629 if (t
->to_stratum
== stratum
)
3636 /* The inferior process has died. Long live the inferior! */
3639 generic_mourn_inferior (void)
3643 ptid
= inferior_ptid
;
3644 inferior_ptid
= null_ptid
;
3646 /* Mark breakpoints uninserted in case something tries to delete a
3647 breakpoint while we delete the inferior's threads (which would
3648 fail, since the inferior is long gone). */
3649 mark_breakpoints_out ();
3651 if (!ptid_equal (ptid
, null_ptid
))
3653 int pid
= ptid_get_pid (ptid
);
3654 exit_inferior (pid
);
3657 /* Note this wipes step-resume breakpoints, so needs to be done
3658 after exit_inferior, which ends up referencing the step-resume
3659 breakpoints through clear_thread_inferior_resources. */
3660 breakpoint_init_inferior (inf_exited
);
3662 registers_changed ();
3664 reopen_exec_file ();
3665 reinit_frame_cache ();
3667 if (deprecated_detach_hook
)
3668 deprecated_detach_hook ();
3671 /* Convert a normal process ID to a string. Returns the string in a
3675 normal_pid_to_str (ptid_t ptid
)
3677 static char buf
[32];
3679 xsnprintf (buf
, sizeof buf
, "process %d", ptid_get_pid (ptid
));
3684 dummy_pid_to_str (struct target_ops
*ops
, ptid_t ptid
)
3686 return normal_pid_to_str (ptid
);
3689 /* Error-catcher for target_find_memory_regions. */
3691 dummy_find_memory_regions (struct target_ops
*self
,
3692 find_memory_region_ftype ignore1
, void *ignore2
)
3694 error (_("Command not implemented for this target."));
3698 /* Error-catcher for target_make_corefile_notes. */
3700 dummy_make_corefile_notes (struct target_ops
*self
,
3701 bfd
*ignore1
, int *ignore2
)
3703 error (_("Command not implemented for this target."));
3707 /* Error-catcher for target_get_bookmark. */
3709 dummy_get_bookmark (struct target_ops
*self
, char *ignore1
, int ignore2
)
3715 /* Error-catcher for target_goto_bookmark. */
3717 dummy_goto_bookmark (struct target_ops
*self
, gdb_byte
*ignore
, int from_tty
)
3722 /* Set up the handful of non-empty slots needed by the dummy target
3726 init_dummy_target (void)
3728 dummy_target
.to_shortname
= "None";
3729 dummy_target
.to_longname
= "None";
3730 dummy_target
.to_doc
= "";
3731 dummy_target
.to_create_inferior
= find_default_create_inferior
;
3732 dummy_target
.to_supports_non_stop
= find_default_supports_non_stop
;
3733 dummy_target
.to_supports_disable_randomization
3734 = find_default_supports_disable_randomization
;
3735 dummy_target
.to_pid_to_str
= dummy_pid_to_str
;
3736 dummy_target
.to_stratum
= dummy_stratum
;
3737 dummy_target
.to_find_memory_regions
= dummy_find_memory_regions
;
3738 dummy_target
.to_make_corefile_notes
= dummy_make_corefile_notes
;
3739 dummy_target
.to_get_bookmark
= dummy_get_bookmark
;
3740 dummy_target
.to_goto_bookmark
= dummy_goto_bookmark
;
3741 dummy_target
.to_has_all_memory
= (int (*) (struct target_ops
*)) return_zero
;
3742 dummy_target
.to_has_memory
= (int (*) (struct target_ops
*)) return_zero
;
3743 dummy_target
.to_has_stack
= (int (*) (struct target_ops
*)) return_zero
;
3744 dummy_target
.to_has_registers
= (int (*) (struct target_ops
*)) return_zero
;
3745 dummy_target
.to_has_execution
3746 = (int (*) (struct target_ops
*, ptid_t
)) return_zero
;
3747 dummy_target
.to_magic
= OPS_MAGIC
;
3749 install_dummy_methods (&dummy_target
);
3753 debug_to_open (char *args
, int from_tty
)
3755 debug_target
.to_open (args
, from_tty
);
3757 fprintf_unfiltered (gdb_stdlog
, "target_open (%s, %d)\n", args
, from_tty
);
3761 target_close (struct target_ops
*targ
)
3763 gdb_assert (!target_is_pushed (targ
));
3765 if (targ
->to_xclose
!= NULL
)
3766 targ
->to_xclose (targ
);
3767 else if (targ
->to_close
!= NULL
)
3768 targ
->to_close (targ
);
3771 fprintf_unfiltered (gdb_stdlog
, "target_close ()\n");
3775 target_attach (char *args
, int from_tty
)
3777 current_target
.to_attach (¤t_target
, args
, from_tty
);
3779 fprintf_unfiltered (gdb_stdlog
, "target_attach (%s, %d)\n",
3784 target_thread_alive (ptid_t ptid
)
3786 struct target_ops
*t
;
3788 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3790 if (t
->to_thread_alive
!= NULL
)
3794 retval
= t
->to_thread_alive (t
, ptid
);
3796 fprintf_unfiltered (gdb_stdlog
, "target_thread_alive (%d) = %d\n",
3797 ptid_get_pid (ptid
), retval
);
3807 target_find_new_threads (void)
3809 struct target_ops
*t
;
3811 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3813 if (t
->to_find_new_threads
!= NULL
)
3815 t
->to_find_new_threads (t
);
3817 fprintf_unfiltered (gdb_stdlog
, "target_find_new_threads ()\n");
3825 target_stop (ptid_t ptid
)
3829 warning (_("May not interrupt or stop the target, ignoring attempt"));
3833 (*current_target
.to_stop
) (¤t_target
, ptid
);
3837 debug_to_post_attach (struct target_ops
*self
, int pid
)
3839 debug_target
.to_post_attach (&debug_target
, pid
);
3841 fprintf_unfiltered (gdb_stdlog
, "target_post_attach (%d)\n", pid
);
3844 /* Concatenate ELEM to LIST, a comma separate list, and return the
3845 result. The LIST incoming argument is released. */
3848 str_comma_list_concat_elem (char *list
, const char *elem
)
3851 return xstrdup (elem
);
3853 return reconcat (list
, list
, ", ", elem
, (char *) NULL
);
3856 /* Helper for target_options_to_string. If OPT is present in
3857 TARGET_OPTIONS, append the OPT_STR (string version of OPT) in RET.
3858 Returns the new resulting string. OPT is removed from
3862 do_option (int *target_options
, char *ret
,
3863 int opt
, char *opt_str
)
3865 if ((*target_options
& opt
) != 0)
3867 ret
= str_comma_list_concat_elem (ret
, opt_str
);
3868 *target_options
&= ~opt
;
3875 target_options_to_string (int target_options
)
3879 #define DO_TARG_OPTION(OPT) \
3880 ret = do_option (&target_options, ret, OPT, #OPT)
3882 DO_TARG_OPTION (TARGET_WNOHANG
);
3884 if (target_options
!= 0)
3885 ret
= str_comma_list_concat_elem (ret
, "unknown???");
3893 debug_print_register (const char * func
,
3894 struct regcache
*regcache
, int regno
)
3896 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
3898 fprintf_unfiltered (gdb_stdlog
, "%s ", func
);
3899 if (regno
>= 0 && regno
< gdbarch_num_regs (gdbarch
)
3900 && gdbarch_register_name (gdbarch
, regno
) != NULL
3901 && gdbarch_register_name (gdbarch
, regno
)[0] != '\0')
3902 fprintf_unfiltered (gdb_stdlog
, "(%s)",
3903 gdbarch_register_name (gdbarch
, regno
));
3905 fprintf_unfiltered (gdb_stdlog
, "(%d)", regno
);
3906 if (regno
>= 0 && regno
< gdbarch_num_regs (gdbarch
))
3908 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
3909 int i
, size
= register_size (gdbarch
, regno
);
3910 gdb_byte buf
[MAX_REGISTER_SIZE
];
3912 regcache_raw_collect (regcache
, regno
, buf
);
3913 fprintf_unfiltered (gdb_stdlog
, " = ");
3914 for (i
= 0; i
< size
; i
++)
3916 fprintf_unfiltered (gdb_stdlog
, "%02x", buf
[i
]);
3918 if (size
<= sizeof (LONGEST
))
3920 ULONGEST val
= extract_unsigned_integer (buf
, size
, byte_order
);
3922 fprintf_unfiltered (gdb_stdlog
, " %s %s",
3923 core_addr_to_string_nz (val
), plongest (val
));
3926 fprintf_unfiltered (gdb_stdlog
, "\n");
3930 target_fetch_registers (struct regcache
*regcache
, int regno
)
3932 struct target_ops
*t
;
3934 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3936 if (t
->to_fetch_registers
!= NULL
)
3938 t
->to_fetch_registers (t
, regcache
, regno
);
3940 debug_print_register ("target_fetch_registers", regcache
, regno
);
3947 target_store_registers (struct regcache
*regcache
, int regno
)
3949 struct target_ops
*t
;
3951 if (!may_write_registers
)
3952 error (_("Writing to registers is not allowed (regno %d)"), regno
);
3954 current_target
.to_store_registers (¤t_target
, regcache
, regno
);
3957 debug_print_register ("target_store_registers", regcache
, regno
);
3962 target_core_of_thread (ptid_t ptid
)
3964 struct target_ops
*t
;
3966 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3968 if (t
->to_core_of_thread
!= NULL
)
3970 int retval
= t
->to_core_of_thread (t
, ptid
);
3973 fprintf_unfiltered (gdb_stdlog
,
3974 "target_core_of_thread (%d) = %d\n",
3975 ptid_get_pid (ptid
), retval
);
3984 target_verify_memory (const gdb_byte
*data
, CORE_ADDR memaddr
, ULONGEST size
)
3986 struct target_ops
*t
;
3988 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3990 if (t
->to_verify_memory
!= NULL
)
3992 int retval
= t
->to_verify_memory (t
, data
, memaddr
, size
);
3995 fprintf_unfiltered (gdb_stdlog
,
3996 "target_verify_memory (%s, %s) = %d\n",
3997 paddress (target_gdbarch (), memaddr
),
4007 /* The documentation for this function is in its prototype declaration in
4011 target_insert_mask_watchpoint (CORE_ADDR addr
, CORE_ADDR mask
, int rw
)
4013 struct target_ops
*t
;
4015 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4016 if (t
->to_insert_mask_watchpoint
!= NULL
)
4020 ret
= t
->to_insert_mask_watchpoint (t
, addr
, mask
, rw
);
4023 fprintf_unfiltered (gdb_stdlog
, "\
4024 target_insert_mask_watchpoint (%s, %s, %d) = %d\n",
4025 core_addr_to_string (addr
),
4026 core_addr_to_string (mask
), rw
, ret
);
4034 /* The documentation for this function is in its prototype declaration in
4038 target_remove_mask_watchpoint (CORE_ADDR addr
, CORE_ADDR mask
, int rw
)
4040 struct target_ops
*t
;
4042 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4043 if (t
->to_remove_mask_watchpoint
!= NULL
)
4047 ret
= t
->to_remove_mask_watchpoint (t
, addr
, mask
, rw
);
4050 fprintf_unfiltered (gdb_stdlog
, "\
4051 target_remove_mask_watchpoint (%s, %s, %d) = %d\n",
4052 core_addr_to_string (addr
),
4053 core_addr_to_string (mask
), rw
, ret
);
4061 /* The documentation for this function is in its prototype declaration
4065 target_masked_watch_num_registers (CORE_ADDR addr
, CORE_ADDR mask
)
4067 struct target_ops
*t
;
4069 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4070 if (t
->to_masked_watch_num_registers
!= NULL
)
4071 return t
->to_masked_watch_num_registers (t
, addr
, mask
);
4076 /* The documentation for this function is in its prototype declaration
4080 target_ranged_break_num_registers (void)
4082 struct target_ops
*t
;
4084 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4085 if (t
->to_ranged_break_num_registers
!= NULL
)
4086 return t
->to_ranged_break_num_registers (t
);
4093 struct btrace_target_info
*
4094 target_enable_btrace (ptid_t ptid
)
4096 struct target_ops
*t
;
4098 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4099 if (t
->to_enable_btrace
!= NULL
)
4100 return t
->to_enable_btrace (t
, ptid
);
4109 target_disable_btrace (struct btrace_target_info
*btinfo
)
4111 struct target_ops
*t
;
4113 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4114 if (t
->to_disable_btrace
!= NULL
)
4116 t
->to_disable_btrace (t
, btinfo
);
4126 target_teardown_btrace (struct btrace_target_info
*btinfo
)
4128 struct target_ops
*t
;
4130 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4131 if (t
->to_teardown_btrace
!= NULL
)
4133 t
->to_teardown_btrace (t
, btinfo
);
4143 target_read_btrace (VEC (btrace_block_s
) **btrace
,
4144 struct btrace_target_info
*btinfo
,
4145 enum btrace_read_type type
)
4147 struct target_ops
*t
;
4149 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4150 if (t
->to_read_btrace
!= NULL
)
4151 return t
->to_read_btrace (t
, btrace
, btinfo
, type
);
4154 return BTRACE_ERR_NOT_SUPPORTED
;
4160 target_stop_recording (void)
4162 struct target_ops
*t
;
4164 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4165 if (t
->to_stop_recording
!= NULL
)
4167 t
->to_stop_recording (t
);
4171 /* This is optional. */
4177 target_info_record (void)
4179 struct target_ops
*t
;
4181 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4182 if (t
->to_info_record
!= NULL
)
4184 t
->to_info_record (t
);
4194 target_save_record (const char *filename
)
4196 struct target_ops
*t
;
4198 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4199 if (t
->to_save_record
!= NULL
)
4201 t
->to_save_record (t
, filename
);
4211 target_supports_delete_record (void)
4213 struct target_ops
*t
;
4215 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4216 if (t
->to_delete_record
!= NULL
)
4225 target_delete_record (void)
4227 struct target_ops
*t
;
4229 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4230 if (t
->to_delete_record
!= NULL
)
4232 t
->to_delete_record (t
);
4242 target_record_is_replaying (void)
4244 struct target_ops
*t
;
4246 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4247 if (t
->to_record_is_replaying
!= NULL
)
4248 return t
->to_record_is_replaying (t
);
4256 target_goto_record_begin (void)
4258 struct target_ops
*t
;
4260 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4261 if (t
->to_goto_record_begin
!= NULL
)
4263 t
->to_goto_record_begin (t
);
4273 target_goto_record_end (void)
4275 struct target_ops
*t
;
4277 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4278 if (t
->to_goto_record_end
!= NULL
)
4280 t
->to_goto_record_end (t
);
4290 target_goto_record (ULONGEST insn
)
4292 struct target_ops
*t
;
4294 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4295 if (t
->to_goto_record
!= NULL
)
4297 t
->to_goto_record (t
, insn
);
4307 target_insn_history (int size
, int flags
)
4309 struct target_ops
*t
;
4311 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4312 if (t
->to_insn_history
!= NULL
)
4314 t
->to_insn_history (t
, size
, flags
);
4324 target_insn_history_from (ULONGEST from
, int size
, int flags
)
4326 struct target_ops
*t
;
4328 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4329 if (t
->to_insn_history_from
!= NULL
)
4331 t
->to_insn_history_from (t
, from
, size
, flags
);
4341 target_insn_history_range (ULONGEST begin
, ULONGEST end
, int flags
)
4343 struct target_ops
*t
;
4345 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4346 if (t
->to_insn_history_range
!= NULL
)
4348 t
->to_insn_history_range (t
, begin
, end
, flags
);
4358 target_call_history (int size
, int flags
)
4360 struct target_ops
*t
;
4362 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4363 if (t
->to_call_history
!= NULL
)
4365 t
->to_call_history (t
, size
, flags
);
4375 target_call_history_from (ULONGEST begin
, int size
, int flags
)
4377 struct target_ops
*t
;
4379 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4380 if (t
->to_call_history_from
!= NULL
)
4382 t
->to_call_history_from (t
, begin
, size
, flags
);
4392 target_call_history_range (ULONGEST begin
, ULONGEST end
, int flags
)
4394 struct target_ops
*t
;
4396 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4397 if (t
->to_call_history_range
!= NULL
)
4399 t
->to_call_history_range (t
, begin
, end
, flags
);
4407 debug_to_prepare_to_store (struct target_ops
*self
, struct regcache
*regcache
)
4409 debug_target
.to_prepare_to_store (&debug_target
, regcache
);
4411 fprintf_unfiltered (gdb_stdlog
, "target_prepare_to_store ()\n");
4416 const struct frame_unwind
*
4417 target_get_unwinder (void)
4419 struct target_ops
*t
;
4421 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4422 if (t
->to_get_unwinder
!= NULL
)
4423 return t
->to_get_unwinder
;
4430 const struct frame_unwind
*
4431 target_get_tailcall_unwinder (void)
4433 struct target_ops
*t
;
4435 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4436 if (t
->to_get_tailcall_unwinder
!= NULL
)
4437 return t
->to_get_tailcall_unwinder
;
4445 forward_target_decr_pc_after_break (struct target_ops
*ops
,
4446 struct gdbarch
*gdbarch
)
4448 for (; ops
!= NULL
; ops
= ops
->beneath
)
4449 if (ops
->to_decr_pc_after_break
!= NULL
)
4450 return ops
->to_decr_pc_after_break (ops
, gdbarch
);
4452 return gdbarch_decr_pc_after_break (gdbarch
);
4458 target_decr_pc_after_break (struct gdbarch
*gdbarch
)
4460 return forward_target_decr_pc_after_break (current_target
.beneath
, gdbarch
);
4464 deprecated_debug_xfer_memory (CORE_ADDR memaddr
, bfd_byte
*myaddr
, int len
,
4465 int write
, struct mem_attrib
*attrib
,
4466 struct target_ops
*target
)
4470 retval
= debug_target
.deprecated_xfer_memory (memaddr
, myaddr
, len
, write
,
4473 fprintf_unfiltered (gdb_stdlog
,
4474 "target_xfer_memory (%s, xxx, %d, %s, xxx) = %d",
4475 paddress (target_gdbarch (), memaddr
), len
,
4476 write
? "write" : "read", retval
);
4482 fputs_unfiltered (", bytes =", gdb_stdlog
);
4483 for (i
= 0; i
< retval
; i
++)
4485 if ((((intptr_t) &(myaddr
[i
])) & 0xf) == 0)
4487 if (targetdebug
< 2 && i
> 0)
4489 fprintf_unfiltered (gdb_stdlog
, " ...");
4492 fprintf_unfiltered (gdb_stdlog
, "\n");
4495 fprintf_unfiltered (gdb_stdlog
, " %02x", myaddr
[i
] & 0xff);
4499 fputc_unfiltered ('\n', gdb_stdlog
);
4505 debug_to_files_info (struct target_ops
*target
)
4507 debug_target
.to_files_info (target
);
4509 fprintf_unfiltered (gdb_stdlog
, "target_files_info (xxx)\n");
4513 debug_to_insert_breakpoint (struct target_ops
*ops
, struct gdbarch
*gdbarch
,
4514 struct bp_target_info
*bp_tgt
)
4518 retval
= debug_target
.to_insert_breakpoint (&debug_target
, gdbarch
, bp_tgt
);
4520 fprintf_unfiltered (gdb_stdlog
,
4521 "target_insert_breakpoint (%s, xxx) = %ld\n",
4522 core_addr_to_string (bp_tgt
->placed_address
),
4523 (unsigned long) retval
);
4528 debug_to_remove_breakpoint (struct target_ops
*ops
, struct gdbarch
*gdbarch
,
4529 struct bp_target_info
*bp_tgt
)
4533 retval
= debug_target
.to_remove_breakpoint (&debug_target
, gdbarch
, bp_tgt
);
4535 fprintf_unfiltered (gdb_stdlog
,
4536 "target_remove_breakpoint (%s, xxx) = %ld\n",
4537 core_addr_to_string (bp_tgt
->placed_address
),
4538 (unsigned long) retval
);
4543 debug_to_can_use_hw_breakpoint (struct target_ops
*self
,
4544 int type
, int cnt
, int from_tty
)
4548 retval
= debug_target
.to_can_use_hw_breakpoint (&debug_target
,
4549 type
, cnt
, from_tty
);
4551 fprintf_unfiltered (gdb_stdlog
,
4552 "target_can_use_hw_breakpoint (%ld, %ld, %ld) = %ld\n",
4553 (unsigned long) type
,
4554 (unsigned long) cnt
,
4555 (unsigned long) from_tty
,
4556 (unsigned long) retval
);
4561 debug_to_region_ok_for_hw_watchpoint (struct target_ops
*self
,
4562 CORE_ADDR addr
, int len
)
4566 retval
= debug_target
.to_region_ok_for_hw_watchpoint (&debug_target
,
4569 fprintf_unfiltered (gdb_stdlog
,
4570 "target_region_ok_for_hw_watchpoint (%s, %ld) = %s\n",
4571 core_addr_to_string (addr
), (unsigned long) len
,
4572 core_addr_to_string (retval
));
4577 debug_to_can_accel_watchpoint_condition (struct target_ops
*self
,
4578 CORE_ADDR addr
, int len
, int rw
,
4579 struct expression
*cond
)
4583 retval
= debug_target
.to_can_accel_watchpoint_condition (&debug_target
,
4587 fprintf_unfiltered (gdb_stdlog
,
4588 "target_can_accel_watchpoint_condition "
4589 "(%s, %d, %d, %s) = %ld\n",
4590 core_addr_to_string (addr
), len
, rw
,
4591 host_address_to_string (cond
), (unsigned long) retval
);
4596 debug_to_stopped_by_watchpoint (struct target_ops
*ops
)
4600 retval
= debug_target
.to_stopped_by_watchpoint (&debug_target
);
4602 fprintf_unfiltered (gdb_stdlog
,
4603 "target_stopped_by_watchpoint () = %ld\n",
4604 (unsigned long) retval
);
4609 debug_to_stopped_data_address (struct target_ops
*target
, CORE_ADDR
*addr
)
4613 retval
= debug_target
.to_stopped_data_address (target
, addr
);
4615 fprintf_unfiltered (gdb_stdlog
,
4616 "target_stopped_data_address ([%s]) = %ld\n",
4617 core_addr_to_string (*addr
),
4618 (unsigned long)retval
);
4623 debug_to_watchpoint_addr_within_range (struct target_ops
*target
,
4625 CORE_ADDR start
, int length
)
4629 retval
= debug_target
.to_watchpoint_addr_within_range (target
, addr
,
4632 fprintf_filtered (gdb_stdlog
,
4633 "target_watchpoint_addr_within_range (%s, %s, %d) = %d\n",
4634 core_addr_to_string (addr
), core_addr_to_string (start
),
4640 debug_to_insert_hw_breakpoint (struct target_ops
*self
,
4641 struct gdbarch
*gdbarch
,
4642 struct bp_target_info
*bp_tgt
)
4646 retval
= debug_target
.to_insert_hw_breakpoint (&debug_target
,
4649 fprintf_unfiltered (gdb_stdlog
,
4650 "target_insert_hw_breakpoint (%s, xxx) = %ld\n",
4651 core_addr_to_string (bp_tgt
->placed_address
),
4652 (unsigned long) retval
);
4657 debug_to_remove_hw_breakpoint (struct target_ops
*self
,
4658 struct gdbarch
*gdbarch
,
4659 struct bp_target_info
*bp_tgt
)
4663 retval
= debug_target
.to_remove_hw_breakpoint (&debug_target
,
4666 fprintf_unfiltered (gdb_stdlog
,
4667 "target_remove_hw_breakpoint (%s, xxx) = %ld\n",
4668 core_addr_to_string (bp_tgt
->placed_address
),
4669 (unsigned long) retval
);
4674 debug_to_insert_watchpoint (struct target_ops
*self
,
4675 CORE_ADDR addr
, int len
, int type
,
4676 struct expression
*cond
)
4680 retval
= debug_target
.to_insert_watchpoint (&debug_target
,
4681 addr
, len
, type
, cond
);
4683 fprintf_unfiltered (gdb_stdlog
,
4684 "target_insert_watchpoint (%s, %d, %d, %s) = %ld\n",
4685 core_addr_to_string (addr
), len
, type
,
4686 host_address_to_string (cond
), (unsigned long) retval
);
4691 debug_to_remove_watchpoint (struct target_ops
*self
,
4692 CORE_ADDR addr
, int len
, int type
,
4693 struct expression
*cond
)
4697 retval
= debug_target
.to_remove_watchpoint (&debug_target
,
4698 addr
, len
, type
, cond
);
4700 fprintf_unfiltered (gdb_stdlog
,
4701 "target_remove_watchpoint (%s, %d, %d, %s) = %ld\n",
4702 core_addr_to_string (addr
), len
, type
,
4703 host_address_to_string (cond
), (unsigned long) retval
);
4708 debug_to_terminal_init (struct target_ops
*self
)
4710 debug_target
.to_terminal_init (&debug_target
);
4712 fprintf_unfiltered (gdb_stdlog
, "target_terminal_init ()\n");
4716 debug_to_terminal_inferior (struct target_ops
*self
)
4718 debug_target
.to_terminal_inferior (&debug_target
);
4720 fprintf_unfiltered (gdb_stdlog
, "target_terminal_inferior ()\n");
4724 debug_to_terminal_ours_for_output (struct target_ops
*self
)
4726 debug_target
.to_terminal_ours_for_output (&debug_target
);
4728 fprintf_unfiltered (gdb_stdlog
, "target_terminal_ours_for_output ()\n");
4732 debug_to_terminal_ours (struct target_ops
*self
)
4734 debug_target
.to_terminal_ours (&debug_target
);
4736 fprintf_unfiltered (gdb_stdlog
, "target_terminal_ours ()\n");
4740 debug_to_terminal_save_ours (struct target_ops
*self
)
4742 debug_target
.to_terminal_save_ours (&debug_target
);
4744 fprintf_unfiltered (gdb_stdlog
, "target_terminal_save_ours ()\n");
4748 debug_to_terminal_info (struct target_ops
*self
,
4749 const char *arg
, int from_tty
)
4751 debug_target
.to_terminal_info (&debug_target
, arg
, from_tty
);
4753 fprintf_unfiltered (gdb_stdlog
, "target_terminal_info (%s, %d)\n", arg
,
4758 debug_to_load (struct target_ops
*self
, char *args
, int from_tty
)
4760 debug_target
.to_load (&debug_target
, args
, from_tty
);
4762 fprintf_unfiltered (gdb_stdlog
, "target_load (%s, %d)\n", args
, from_tty
);
4766 debug_to_post_startup_inferior (struct target_ops
*self
, ptid_t ptid
)
4768 debug_target
.to_post_startup_inferior (&debug_target
, ptid
);
4770 fprintf_unfiltered (gdb_stdlog
, "target_post_startup_inferior (%d)\n",
4771 ptid_get_pid (ptid
));
4775 debug_to_insert_fork_catchpoint (struct target_ops
*self
, int pid
)
4779 retval
= debug_target
.to_insert_fork_catchpoint (&debug_target
, pid
);
4781 fprintf_unfiltered (gdb_stdlog
, "target_insert_fork_catchpoint (%d) = %d\n",
4788 debug_to_remove_fork_catchpoint (struct target_ops
*self
, int pid
)
4792 retval
= debug_target
.to_remove_fork_catchpoint (&debug_target
, pid
);
4794 fprintf_unfiltered (gdb_stdlog
, "target_remove_fork_catchpoint (%d) = %d\n",
4801 debug_to_insert_vfork_catchpoint (struct target_ops
*self
, int pid
)
4805 retval
= debug_target
.to_insert_vfork_catchpoint (&debug_target
, pid
);
4807 fprintf_unfiltered (gdb_stdlog
, "target_insert_vfork_catchpoint (%d) = %d\n",
4814 debug_to_remove_vfork_catchpoint (struct target_ops
*self
, int pid
)
4818 retval
= debug_target
.to_remove_vfork_catchpoint (&debug_target
, pid
);
4820 fprintf_unfiltered (gdb_stdlog
, "target_remove_vfork_catchpoint (%d) = %d\n",
4827 debug_to_insert_exec_catchpoint (struct target_ops
*self
, int pid
)
4831 retval
= debug_target
.to_insert_exec_catchpoint (&debug_target
, pid
);
4833 fprintf_unfiltered (gdb_stdlog
, "target_insert_exec_catchpoint (%d) = %d\n",
4840 debug_to_remove_exec_catchpoint (struct target_ops
*self
, int pid
)
4844 retval
= debug_target
.to_remove_exec_catchpoint (&debug_target
, pid
);
4846 fprintf_unfiltered (gdb_stdlog
, "target_remove_exec_catchpoint (%d) = %d\n",
4853 debug_to_has_exited (struct target_ops
*self
,
4854 int pid
, int wait_status
, int *exit_status
)
4858 has_exited
= debug_target
.to_has_exited (&debug_target
,
4859 pid
, wait_status
, exit_status
);
4861 fprintf_unfiltered (gdb_stdlog
, "target_has_exited (%d, %d, %d) = %d\n",
4862 pid
, wait_status
, *exit_status
, has_exited
);
4868 debug_to_can_run (struct target_ops
*self
)
4872 retval
= debug_target
.to_can_run (&debug_target
);
4874 fprintf_unfiltered (gdb_stdlog
, "target_can_run () = %d\n", retval
);
4879 static struct gdbarch
*
4880 debug_to_thread_architecture (struct target_ops
*ops
, ptid_t ptid
)
4882 struct gdbarch
*retval
;
4884 retval
= debug_target
.to_thread_architecture (ops
, ptid
);
4886 fprintf_unfiltered (gdb_stdlog
,
4887 "target_thread_architecture (%s) = %s [%s]\n",
4888 target_pid_to_str (ptid
),
4889 host_address_to_string (retval
),
4890 gdbarch_bfd_arch_info (retval
)->printable_name
);
4895 debug_to_stop (struct target_ops
*self
, ptid_t ptid
)
4897 debug_target
.to_stop (&debug_target
, ptid
);
4899 fprintf_unfiltered (gdb_stdlog
, "target_stop (%s)\n",
4900 target_pid_to_str (ptid
));
4904 debug_to_rcmd (struct target_ops
*self
, char *command
,
4905 struct ui_file
*outbuf
)
4907 debug_target
.to_rcmd (&debug_target
, command
, outbuf
);
4908 fprintf_unfiltered (gdb_stdlog
, "target_rcmd (%s, ...)\n", command
);
4912 debug_to_pid_to_exec_file (struct target_ops
*self
, int pid
)
4916 exec_file
= debug_target
.to_pid_to_exec_file (&debug_target
, pid
);
4918 fprintf_unfiltered (gdb_stdlog
, "target_pid_to_exec_file (%d) = %s\n",
4925 setup_target_debug (void)
4927 memcpy (&debug_target
, ¤t_target
, sizeof debug_target
);
4929 current_target
.to_open
= debug_to_open
;
4930 current_target
.to_post_attach
= debug_to_post_attach
;
4931 current_target
.to_prepare_to_store
= debug_to_prepare_to_store
;
4932 current_target
.deprecated_xfer_memory
= deprecated_debug_xfer_memory
;
4933 current_target
.to_files_info
= debug_to_files_info
;
4934 current_target
.to_insert_breakpoint
= debug_to_insert_breakpoint
;
4935 current_target
.to_remove_breakpoint
= debug_to_remove_breakpoint
;
4936 current_target
.to_can_use_hw_breakpoint
= debug_to_can_use_hw_breakpoint
;
4937 current_target
.to_insert_hw_breakpoint
= debug_to_insert_hw_breakpoint
;
4938 current_target
.to_remove_hw_breakpoint
= debug_to_remove_hw_breakpoint
;
4939 current_target
.to_insert_watchpoint
= debug_to_insert_watchpoint
;
4940 current_target
.to_remove_watchpoint
= debug_to_remove_watchpoint
;
4941 current_target
.to_stopped_by_watchpoint
= debug_to_stopped_by_watchpoint
;
4942 current_target
.to_stopped_data_address
= debug_to_stopped_data_address
;
4943 current_target
.to_watchpoint_addr_within_range
4944 = debug_to_watchpoint_addr_within_range
;
4945 current_target
.to_region_ok_for_hw_watchpoint
4946 = debug_to_region_ok_for_hw_watchpoint
;
4947 current_target
.to_can_accel_watchpoint_condition
4948 = debug_to_can_accel_watchpoint_condition
;
4949 current_target
.to_terminal_init
= debug_to_terminal_init
;
4950 current_target
.to_terminal_inferior
= debug_to_terminal_inferior
;
4951 current_target
.to_terminal_ours_for_output
4952 = debug_to_terminal_ours_for_output
;
4953 current_target
.to_terminal_ours
= debug_to_terminal_ours
;
4954 current_target
.to_terminal_save_ours
= debug_to_terminal_save_ours
;
4955 current_target
.to_terminal_info
= debug_to_terminal_info
;
4956 current_target
.to_load
= debug_to_load
;
4957 current_target
.to_post_startup_inferior
= debug_to_post_startup_inferior
;
4958 current_target
.to_insert_fork_catchpoint
= debug_to_insert_fork_catchpoint
;
4959 current_target
.to_remove_fork_catchpoint
= debug_to_remove_fork_catchpoint
;
4960 current_target
.to_insert_vfork_catchpoint
= debug_to_insert_vfork_catchpoint
;
4961 current_target
.to_remove_vfork_catchpoint
= debug_to_remove_vfork_catchpoint
;
4962 current_target
.to_insert_exec_catchpoint
= debug_to_insert_exec_catchpoint
;
4963 current_target
.to_remove_exec_catchpoint
= debug_to_remove_exec_catchpoint
;
4964 current_target
.to_has_exited
= debug_to_has_exited
;
4965 current_target
.to_can_run
= debug_to_can_run
;
4966 current_target
.to_stop
= debug_to_stop
;
4967 current_target
.to_rcmd
= debug_to_rcmd
;
4968 current_target
.to_pid_to_exec_file
= debug_to_pid_to_exec_file
;
4969 current_target
.to_thread_architecture
= debug_to_thread_architecture
;
4973 static char targ_desc
[] =
4974 "Names of targets and files being debugged.\nShows the entire \
4975 stack of targets currently in use (including the exec-file,\n\
4976 core-file, and process, if any), as well as the symbol file name.";
4979 default_rcmd (struct target_ops
*self
, char *command
, struct ui_file
*output
)
4981 error (_("\"monitor\" command not supported by this target."));
4985 do_monitor_command (char *cmd
,
4988 target_rcmd (cmd
, gdb_stdtarg
);
4991 /* Print the name of each layers of our target stack. */
4994 maintenance_print_target_stack (char *cmd
, int from_tty
)
4996 struct target_ops
*t
;
4998 printf_filtered (_("The current target stack is:\n"));
5000 for (t
= target_stack
; t
!= NULL
; t
= t
->beneath
)
5002 printf_filtered (" - %s (%s)\n", t
->to_shortname
, t
->to_longname
);
5006 /* Controls if async mode is permitted. */
5007 int target_async_permitted
= 0;
5009 /* The set command writes to this variable. If the inferior is
5010 executing, target_async_permitted is *not* updated. */
5011 static int target_async_permitted_1
= 0;
5014 set_target_async_command (char *args
, int from_tty
,
5015 struct cmd_list_element
*c
)
5017 if (have_live_inferiors ())
5019 target_async_permitted_1
= target_async_permitted
;
5020 error (_("Cannot change this setting while the inferior is running."));
5023 target_async_permitted
= target_async_permitted_1
;
5027 show_target_async_command (struct ui_file
*file
, int from_tty
,
5028 struct cmd_list_element
*c
,
5031 fprintf_filtered (file
,
5032 _("Controlling the inferior in "
5033 "asynchronous mode is %s.\n"), value
);
5036 /* Temporary copies of permission settings. */
5038 static int may_write_registers_1
= 1;
5039 static int may_write_memory_1
= 1;
5040 static int may_insert_breakpoints_1
= 1;
5041 static int may_insert_tracepoints_1
= 1;
5042 static int may_insert_fast_tracepoints_1
= 1;
5043 static int may_stop_1
= 1;
5045 /* Make the user-set values match the real values again. */
5048 update_target_permissions (void)
5050 may_write_registers_1
= may_write_registers
;
5051 may_write_memory_1
= may_write_memory
;
5052 may_insert_breakpoints_1
= may_insert_breakpoints
;
5053 may_insert_tracepoints_1
= may_insert_tracepoints
;
5054 may_insert_fast_tracepoints_1
= may_insert_fast_tracepoints
;
5055 may_stop_1
= may_stop
;
5058 /* The one function handles (most of) the permission flags in the same
5062 set_target_permissions (char *args
, int from_tty
,
5063 struct cmd_list_element
*c
)
5065 if (target_has_execution
)
5067 update_target_permissions ();
5068 error (_("Cannot change this setting while the inferior is running."));
5071 /* Make the real values match the user-changed values. */
5072 may_write_registers
= may_write_registers_1
;
5073 may_insert_breakpoints
= may_insert_breakpoints_1
;
5074 may_insert_tracepoints
= may_insert_tracepoints_1
;
5075 may_insert_fast_tracepoints
= may_insert_fast_tracepoints_1
;
5076 may_stop
= may_stop_1
;
5077 update_observer_mode ();
5080 /* Set memory write permission independently of observer mode. */
5083 set_write_memory_permission (char *args
, int from_tty
,
5084 struct cmd_list_element
*c
)
5086 /* Make the real values match the user-changed values. */
5087 may_write_memory
= may_write_memory_1
;
5088 update_observer_mode ();
5093 initialize_targets (void)
5095 init_dummy_target ();
5096 push_target (&dummy_target
);
5098 add_info ("target", target_info
, targ_desc
);
5099 add_info ("files", target_info
, targ_desc
);
5101 add_setshow_zuinteger_cmd ("target", class_maintenance
, &targetdebug
, _("\
5102 Set target debugging."), _("\
5103 Show target debugging."), _("\
5104 When non-zero, target debugging is enabled. Higher numbers are more\n\
5105 verbose. Changes do not take effect until the next \"run\" or \"target\"\n\
5109 &setdebuglist
, &showdebuglist
);
5111 add_setshow_boolean_cmd ("trust-readonly-sections", class_support
,
5112 &trust_readonly
, _("\
5113 Set mode for reading from readonly sections."), _("\
5114 Show mode for reading from readonly sections."), _("\
5115 When this mode is on, memory reads from readonly sections (such as .text)\n\
5116 will be read from the object file instead of from the target. This will\n\
5117 result in significant performance improvement for remote targets."),
5119 show_trust_readonly
,
5120 &setlist
, &showlist
);
5122 add_com ("monitor", class_obscure
, do_monitor_command
,
5123 _("Send a command to the remote monitor (remote targets only)."));
5125 add_cmd ("target-stack", class_maintenance
, maintenance_print_target_stack
,
5126 _("Print the name of each layer of the internal target stack."),
5127 &maintenanceprintlist
);
5129 add_setshow_boolean_cmd ("target-async", no_class
,
5130 &target_async_permitted_1
, _("\
5131 Set whether gdb controls the inferior in asynchronous mode."), _("\
5132 Show whether gdb controls the inferior in asynchronous mode."), _("\
5133 Tells gdb whether to control the inferior in asynchronous mode."),
5134 set_target_async_command
,
5135 show_target_async_command
,
5139 add_setshow_boolean_cmd ("may-write-registers", class_support
,
5140 &may_write_registers_1
, _("\
5141 Set permission to write into registers."), _("\
5142 Show permission to write into registers."), _("\
5143 When this permission is on, GDB may write into the target's registers.\n\
5144 Otherwise, any sort of write attempt will result in an error."),
5145 set_target_permissions
, NULL
,
5146 &setlist
, &showlist
);
5148 add_setshow_boolean_cmd ("may-write-memory", class_support
,
5149 &may_write_memory_1
, _("\
5150 Set permission to write into target memory."), _("\
5151 Show permission to write into target memory."), _("\
5152 When this permission is on, GDB may write into the target's memory.\n\
5153 Otherwise, any sort of write attempt will result in an error."),
5154 set_write_memory_permission
, NULL
,
5155 &setlist
, &showlist
);
5157 add_setshow_boolean_cmd ("may-insert-breakpoints", class_support
,
5158 &may_insert_breakpoints_1
, _("\
5159 Set permission to insert breakpoints in the target."), _("\
5160 Show permission to insert breakpoints in the target."), _("\
5161 When this permission is on, GDB may insert breakpoints in the program.\n\
5162 Otherwise, any sort of insertion attempt will result in an error."),
5163 set_target_permissions
, NULL
,
5164 &setlist
, &showlist
);
5166 add_setshow_boolean_cmd ("may-insert-tracepoints", class_support
,
5167 &may_insert_tracepoints_1
, _("\
5168 Set permission to insert tracepoints in the target."), _("\
5169 Show permission to insert tracepoints in the target."), _("\
5170 When this permission is on, GDB may insert tracepoints in the program.\n\
5171 Otherwise, any sort of insertion attempt will result in an error."),
5172 set_target_permissions
, NULL
,
5173 &setlist
, &showlist
);
5175 add_setshow_boolean_cmd ("may-insert-fast-tracepoints", class_support
,
5176 &may_insert_fast_tracepoints_1
, _("\
5177 Set permission to insert fast tracepoints in the target."), _("\
5178 Show permission to insert fast tracepoints in the target."), _("\
5179 When this permission is on, GDB may insert fast tracepoints.\n\
5180 Otherwise, any sort of insertion attempt will result in an error."),
5181 set_target_permissions
, NULL
,
5182 &setlist
, &showlist
);
5184 add_setshow_boolean_cmd ("may-interrupt", class_support
,
5186 Set permission to interrupt or signal the target."), _("\
5187 Show permission to interrupt or signal the target."), _("\
5188 When this permission is on, GDB may interrupt/stop the target's execution.\n\
5189 Otherwise, any attempt to interrupt or stop will be ignored."),
5190 set_target_permissions
, NULL
,
5191 &setlist
, &showlist
);