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 (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 tcomplain (void) ATTRIBUTE_NORETURN
;
60 static int nomemory (CORE_ADDR
, char *, int, int, struct target_ops
*);
62 static int return_zero (void);
64 static int return_one (void);
66 static int return_minus_one (void);
68 static void *return_null (void);
70 void target_ignore (void);
72 static void target_command (char *, int);
74 static struct target_ops
*find_default_run_target (char *);
76 static target_xfer_partial_ftype default_xfer_partial
;
78 static struct gdbarch
*default_thread_architecture (struct target_ops
*ops
,
81 static int find_default_can_async_p (struct target_ops
*ignore
);
83 static int find_default_is_async_p (struct target_ops
*ignore
);
85 #include "target-delegates.c"
87 static void init_dummy_target (void);
89 static struct target_ops debug_target
;
91 static void debug_to_open (char *, int);
93 static void debug_to_prepare_to_store (struct target_ops
*self
,
96 static void debug_to_files_info (struct target_ops
*);
98 static int debug_to_insert_breakpoint (struct target_ops
*, struct gdbarch
*,
99 struct bp_target_info
*);
101 static int debug_to_remove_breakpoint (struct target_ops
*, struct gdbarch
*,
102 struct bp_target_info
*);
104 static int debug_to_can_use_hw_breakpoint (struct target_ops
*self
,
107 static int debug_to_insert_hw_breakpoint (struct target_ops
*self
,
109 struct bp_target_info
*);
111 static int debug_to_remove_hw_breakpoint (struct target_ops
*self
,
113 struct bp_target_info
*);
115 static int debug_to_insert_watchpoint (struct target_ops
*self
,
117 struct expression
*);
119 static int debug_to_remove_watchpoint (struct target_ops
*self
,
121 struct expression
*);
123 static int debug_to_stopped_data_address (struct target_ops
*, CORE_ADDR
*);
125 static int debug_to_watchpoint_addr_within_range (struct target_ops
*,
126 CORE_ADDR
, CORE_ADDR
, int);
128 static int debug_to_region_ok_for_hw_watchpoint (struct target_ops
*self
,
131 static int debug_to_can_accel_watchpoint_condition (CORE_ADDR
, int, int,
132 struct expression
*);
134 static void debug_to_terminal_init (void);
136 static void debug_to_terminal_inferior (void);
138 static void debug_to_terminal_ours_for_output (void);
140 static void debug_to_terminal_save_ours (void);
142 static void debug_to_terminal_ours (void);
144 static void debug_to_load (char *, int);
146 static int debug_to_can_run (void);
148 static void debug_to_stop (ptid_t
);
150 /* Pointer to array of target architecture structures; the size of the
151 array; the current index into the array; the allocated size of the
153 struct target_ops
**target_structs
;
154 unsigned target_struct_size
;
155 unsigned target_struct_allocsize
;
156 #define DEFAULT_ALLOCSIZE 10
158 /* The initial current target, so that there is always a semi-valid
161 static struct target_ops dummy_target
;
163 /* Top of target stack. */
165 static struct target_ops
*target_stack
;
167 /* The target structure we are currently using to talk to a process
168 or file or whatever "inferior" we have. */
170 struct target_ops current_target
;
172 /* Command list for target. */
174 static struct cmd_list_element
*targetlist
= NULL
;
176 /* Nonzero if we should trust readonly sections from the
177 executable when reading memory. */
179 static int trust_readonly
= 0;
181 /* Nonzero if we should show true memory content including
182 memory breakpoint inserted by gdb. */
184 static int show_memory_breakpoints
= 0;
186 /* These globals control whether GDB attempts to perform these
187 operations; they are useful for targets that need to prevent
188 inadvertant disruption, such as in non-stop mode. */
190 int may_write_registers
= 1;
192 int may_write_memory
= 1;
194 int may_insert_breakpoints
= 1;
196 int may_insert_tracepoints
= 1;
198 int may_insert_fast_tracepoints
= 1;
202 /* Non-zero if we want to see trace of target level stuff. */
204 static unsigned int targetdebug
= 0;
206 show_targetdebug (struct ui_file
*file
, int from_tty
,
207 struct cmd_list_element
*c
, const char *value
)
209 fprintf_filtered (file
, _("Target debugging is %s.\n"), value
);
212 static void setup_target_debug (void);
214 /* The user just typed 'target' without the name of a target. */
217 target_command (char *arg
, int from_tty
)
219 fputs_filtered ("Argument required (target name). Try `help target'\n",
223 /* Default target_has_* methods for process_stratum targets. */
226 default_child_has_all_memory (struct target_ops
*ops
)
228 /* If no inferior selected, then we can't read memory here. */
229 if (ptid_equal (inferior_ptid
, null_ptid
))
236 default_child_has_memory (struct target_ops
*ops
)
238 /* If no inferior selected, then we can't read memory here. */
239 if (ptid_equal (inferior_ptid
, null_ptid
))
246 default_child_has_stack (struct target_ops
*ops
)
248 /* If no inferior selected, there's no stack. */
249 if (ptid_equal (inferior_ptid
, null_ptid
))
256 default_child_has_registers (struct target_ops
*ops
)
258 /* Can't read registers from no inferior. */
259 if (ptid_equal (inferior_ptid
, null_ptid
))
266 default_child_has_execution (struct target_ops
*ops
, ptid_t the_ptid
)
268 /* If there's no thread selected, then we can't make it run through
270 if (ptid_equal (the_ptid
, null_ptid
))
278 target_has_all_memory_1 (void)
280 struct target_ops
*t
;
282 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
283 if (t
->to_has_all_memory (t
))
290 target_has_memory_1 (void)
292 struct target_ops
*t
;
294 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
295 if (t
->to_has_memory (t
))
302 target_has_stack_1 (void)
304 struct target_ops
*t
;
306 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
307 if (t
->to_has_stack (t
))
314 target_has_registers_1 (void)
316 struct target_ops
*t
;
318 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
319 if (t
->to_has_registers (t
))
326 target_has_execution_1 (ptid_t the_ptid
)
328 struct target_ops
*t
;
330 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
331 if (t
->to_has_execution (t
, the_ptid
))
338 target_has_execution_current (void)
340 return target_has_execution_1 (inferior_ptid
);
343 /* Complete initialization of T. This ensures that various fields in
344 T are set, if needed by the target implementation. */
347 complete_target_initialization (struct target_ops
*t
)
349 /* Provide default values for all "must have" methods. */
350 if (t
->to_xfer_partial
== NULL
)
351 t
->to_xfer_partial
= default_xfer_partial
;
353 if (t
->to_has_all_memory
== NULL
)
354 t
->to_has_all_memory
= (int (*) (struct target_ops
*)) return_zero
;
356 if (t
->to_has_memory
== NULL
)
357 t
->to_has_memory
= (int (*) (struct target_ops
*)) return_zero
;
359 if (t
->to_has_stack
== NULL
)
360 t
->to_has_stack
= (int (*) (struct target_ops
*)) return_zero
;
362 if (t
->to_has_registers
== NULL
)
363 t
->to_has_registers
= (int (*) (struct target_ops
*)) return_zero
;
365 if (t
->to_has_execution
== NULL
)
366 t
->to_has_execution
= (int (*) (struct target_ops
*, ptid_t
)) return_zero
;
368 install_delegators (t
);
371 /* Add possible target architecture T to the list and add a new
372 command 'target T->to_shortname'. Set COMPLETER as the command's
373 completer if not NULL. */
376 add_target_with_completer (struct target_ops
*t
,
377 completer_ftype
*completer
)
379 struct cmd_list_element
*c
;
381 complete_target_initialization (t
);
385 target_struct_allocsize
= DEFAULT_ALLOCSIZE
;
386 target_structs
= (struct target_ops
**) xmalloc
387 (target_struct_allocsize
* sizeof (*target_structs
));
389 if (target_struct_size
>= target_struct_allocsize
)
391 target_struct_allocsize
*= 2;
392 target_structs
= (struct target_ops
**)
393 xrealloc ((char *) target_structs
,
394 target_struct_allocsize
* sizeof (*target_structs
));
396 target_structs
[target_struct_size
++] = t
;
398 if (targetlist
== NULL
)
399 add_prefix_cmd ("target", class_run
, target_command
, _("\
400 Connect to a target machine or process.\n\
401 The first argument is the type or protocol of the target machine.\n\
402 Remaining arguments are interpreted by the target protocol. For more\n\
403 information on the arguments for a particular protocol, type\n\
404 `help target ' followed by the protocol name."),
405 &targetlist
, "target ", 0, &cmdlist
);
406 c
= add_cmd (t
->to_shortname
, no_class
, t
->to_open
, t
->to_doc
,
408 if (completer
!= NULL
)
409 set_cmd_completer (c
, completer
);
412 /* Add a possible target architecture to the list. */
415 add_target (struct target_ops
*t
)
417 add_target_with_completer (t
, NULL
);
423 add_deprecated_target_alias (struct target_ops
*t
, char *alias
)
425 struct cmd_list_element
*c
;
428 /* If we use add_alias_cmd, here, we do not get the deprecated warning,
430 c
= add_cmd (alias
, no_class
, t
->to_open
, t
->to_doc
, &targetlist
);
431 alt
= xstrprintf ("target %s", t
->to_shortname
);
432 deprecate_cmd (c
, alt
);
445 struct target_ops
*t
;
447 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
448 if (t
->to_kill
!= NULL
)
451 fprintf_unfiltered (gdb_stdlog
, "target_kill ()\n");
461 target_load (char *arg
, int from_tty
)
463 target_dcache_invalidate ();
464 (*current_target
.to_load
) (arg
, from_tty
);
468 target_create_inferior (char *exec_file
, char *args
,
469 char **env
, int from_tty
)
471 struct target_ops
*t
;
473 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
475 if (t
->to_create_inferior
!= NULL
)
477 t
->to_create_inferior (t
, exec_file
, args
, env
, from_tty
);
479 fprintf_unfiltered (gdb_stdlog
,
480 "target_create_inferior (%s, %s, xxx, %d)\n",
481 exec_file
, args
, from_tty
);
486 internal_error (__FILE__
, __LINE__
,
487 _("could not find a target to create inferior"));
491 target_terminal_inferior (void)
493 /* A background resume (``run&'') should leave GDB in control of the
494 terminal. Use target_can_async_p, not target_is_async_p, since at
495 this point the target is not async yet. However, if sync_execution
496 is not set, we know it will become async prior to resume. */
497 if (target_can_async_p () && !sync_execution
)
500 /* If GDB is resuming the inferior in the foreground, install
501 inferior's terminal modes. */
502 (*current_target
.to_terminal_inferior
) ();
506 nomemory (CORE_ADDR memaddr
, char *myaddr
, int len
, int write
,
507 struct target_ops
*t
)
509 errno
= EIO
; /* Can't read/write this location. */
510 return 0; /* No bytes handled. */
516 error (_("You can't do that when your target is `%s'"),
517 current_target
.to_shortname
);
523 error (_("You can't do that without a process to debug."));
527 default_terminal_info (const char *args
, int from_tty
)
529 printf_unfiltered (_("No saved terminal information.\n"));
532 /* A default implementation for the to_get_ada_task_ptid target method.
534 This function builds the PTID by using both LWP and TID as part of
535 the PTID lwp and tid elements. The pid used is the pid of the
539 default_get_ada_task_ptid (long lwp
, long tid
)
541 return ptid_build (ptid_get_pid (inferior_ptid
), lwp
, tid
);
544 static enum exec_direction_kind
545 default_execution_direction (void)
547 if (!target_can_execute_reverse
)
549 else if (!target_can_async_p ())
552 gdb_assert_not_reached ("\
553 to_execution_direction must be implemented for reverse async");
556 /* Go through the target stack from top to bottom, copying over zero
557 entries in current_target, then filling in still empty entries. In
558 effect, we are doing class inheritance through the pushed target
561 NOTE: cagney/2003-10-17: The problem with this inheritance, as it
562 is currently implemented, is that it discards any knowledge of
563 which target an inherited method originally belonged to.
564 Consequently, new new target methods should instead explicitly and
565 locally search the target stack for the target that can handle the
569 update_current_target (void)
571 struct target_ops
*t
;
573 /* First, reset current's contents. */
574 memset (¤t_target
, 0, sizeof (current_target
));
576 /* Install the delegators. */
577 install_delegators (¤t_target
);
579 #define INHERIT(FIELD, TARGET) \
580 if (!current_target.FIELD) \
581 current_target.FIELD = (TARGET)->FIELD
583 for (t
= target_stack
; t
; t
= t
->beneath
)
585 INHERIT (to_shortname
, t
);
586 INHERIT (to_longname
, t
);
588 /* Do not inherit to_open. */
589 /* Do not inherit to_close. */
590 /* Do not inherit to_attach. */
591 INHERIT (to_post_attach
, t
);
592 INHERIT (to_attach_no_wait
, t
);
593 /* Do not inherit to_detach. */
594 /* Do not inherit to_disconnect. */
595 /* Do not inherit to_resume. */
596 /* Do not inherit to_wait. */
597 /* Do not inherit to_fetch_registers. */
598 /* Do not inherit to_store_registers. */
599 INHERIT (to_prepare_to_store
, t
);
600 INHERIT (deprecated_xfer_memory
, t
);
601 INHERIT (to_files_info
, t
);
602 /* Do not inherit to_insert_breakpoint. */
603 /* Do not inherit to_remove_breakpoint. */
604 INHERIT (to_can_use_hw_breakpoint
, t
);
605 INHERIT (to_insert_hw_breakpoint
, t
);
606 INHERIT (to_remove_hw_breakpoint
, t
);
607 /* Do not inherit to_ranged_break_num_registers. */
608 INHERIT (to_insert_watchpoint
, t
);
609 INHERIT (to_remove_watchpoint
, t
);
610 /* Do not inherit to_insert_mask_watchpoint. */
611 /* Do not inherit to_remove_mask_watchpoint. */
612 /* Do not inherit to_stopped_data_address. */
613 INHERIT (to_have_steppable_watchpoint
, t
);
614 INHERIT (to_have_continuable_watchpoint
, t
);
615 /* Do not inherit to_stopped_by_watchpoint. */
616 INHERIT (to_watchpoint_addr_within_range
, t
);
617 INHERIT (to_region_ok_for_hw_watchpoint
, t
);
618 INHERIT (to_can_accel_watchpoint_condition
, t
);
619 /* Do not inherit to_masked_watch_num_registers. */
620 INHERIT (to_terminal_init
, t
);
621 INHERIT (to_terminal_inferior
, t
);
622 INHERIT (to_terminal_ours_for_output
, t
);
623 INHERIT (to_terminal_ours
, t
);
624 INHERIT (to_terminal_save_ours
, t
);
625 INHERIT (to_terminal_info
, t
);
626 /* Do not inherit to_kill. */
627 INHERIT (to_load
, t
);
628 /* Do no inherit to_create_inferior. */
629 INHERIT (to_post_startup_inferior
, t
);
630 INHERIT (to_insert_fork_catchpoint
, t
);
631 INHERIT (to_remove_fork_catchpoint
, t
);
632 INHERIT (to_insert_vfork_catchpoint
, t
);
633 INHERIT (to_remove_vfork_catchpoint
, t
);
634 /* Do not inherit to_follow_fork. */
635 INHERIT (to_insert_exec_catchpoint
, t
);
636 INHERIT (to_remove_exec_catchpoint
, t
);
637 INHERIT (to_set_syscall_catchpoint
, t
);
638 INHERIT (to_has_exited
, t
);
639 /* Do not inherit to_mourn_inferior. */
640 INHERIT (to_can_run
, t
);
641 /* Do not inherit to_pass_signals. */
642 /* Do not inherit to_program_signals. */
643 /* Do not inherit to_thread_alive. */
644 /* Do not inherit to_find_new_threads. */
645 /* Do not inherit to_pid_to_str. */
646 INHERIT (to_extra_thread_info
, t
);
647 INHERIT (to_thread_name
, t
);
648 INHERIT (to_stop
, t
);
649 /* Do not inherit to_xfer_partial. */
650 INHERIT (to_rcmd
, t
);
651 INHERIT (to_pid_to_exec_file
, t
);
652 INHERIT (to_log_command
, t
);
653 INHERIT (to_stratum
, t
);
654 /* Do not inherit to_has_all_memory. */
655 /* Do not inherit to_has_memory. */
656 /* Do not inherit to_has_stack. */
657 /* Do not inherit to_has_registers. */
658 /* Do not inherit to_has_execution. */
659 INHERIT (to_has_thread_control
, t
);
660 /* Do not inherit to_can_async_p. */
661 /* Do not inherit to_is_async_p. */
662 /* Do not inherit to_async. */
663 INHERIT (to_find_memory_regions
, t
);
664 INHERIT (to_make_corefile_notes
, t
);
665 INHERIT (to_get_bookmark
, t
);
666 INHERIT (to_goto_bookmark
, t
);
667 /* Do not inherit to_get_thread_local_address. */
668 INHERIT (to_can_execute_reverse
, t
);
669 INHERIT (to_execution_direction
, t
);
670 INHERIT (to_thread_architecture
, t
);
671 /* Do not inherit to_read_description. */
672 INHERIT (to_get_ada_task_ptid
, t
);
673 /* Do not inherit to_search_memory. */
674 INHERIT (to_supports_multi_process
, t
);
675 INHERIT (to_supports_enable_disable_tracepoint
, t
);
676 INHERIT (to_supports_string_tracing
, t
);
677 INHERIT (to_trace_init
, t
);
678 INHERIT (to_download_tracepoint
, t
);
679 INHERIT (to_can_download_tracepoint
, t
);
680 INHERIT (to_download_trace_state_variable
, t
);
681 INHERIT (to_enable_tracepoint
, t
);
682 INHERIT (to_disable_tracepoint
, t
);
683 INHERIT (to_trace_set_readonly_regions
, t
);
684 INHERIT (to_trace_start
, t
);
685 INHERIT (to_get_trace_status
, t
);
686 INHERIT (to_get_tracepoint_status
, t
);
687 INHERIT (to_trace_stop
, t
);
688 INHERIT (to_trace_find
, t
);
689 INHERIT (to_get_trace_state_variable_value
, t
);
690 INHERIT (to_save_trace_data
, t
);
691 INHERIT (to_upload_tracepoints
, t
);
692 INHERIT (to_upload_trace_state_variables
, t
);
693 INHERIT (to_get_raw_trace_data
, t
);
694 INHERIT (to_get_min_fast_tracepoint_insn_len
, t
);
695 INHERIT (to_set_disconnected_tracing
, t
);
696 INHERIT (to_set_circular_trace_buffer
, t
);
697 INHERIT (to_set_trace_buffer_size
, t
);
698 INHERIT (to_set_trace_notes
, t
);
699 INHERIT (to_get_tib_address
, t
);
700 INHERIT (to_set_permissions
, t
);
701 INHERIT (to_static_tracepoint_marker_at
, t
);
702 INHERIT (to_static_tracepoint_markers_by_strid
, t
);
703 INHERIT (to_traceframe_info
, t
);
704 INHERIT (to_use_agent
, t
);
705 INHERIT (to_can_use_agent
, t
);
706 INHERIT (to_augmented_libraries_svr4_read
, t
);
707 INHERIT (to_magic
, t
);
708 INHERIT (to_supports_evaluation_of_breakpoint_conditions
, t
);
709 INHERIT (to_can_run_breakpoint_commands
, t
);
710 /* Do not inherit to_memory_map. */
711 /* Do not inherit to_flash_erase. */
712 /* Do not inherit to_flash_done. */
716 /* Clean up a target struct so it no longer has any zero pointers in
717 it. Some entries are defaulted to a method that print an error,
718 others are hard-wired to a standard recursive default. */
720 #define de_fault(field, value) \
721 if (!current_target.field) \
722 current_target.field = value
725 (void (*) (char *, int))
728 (void (*) (struct target_ops
*))
730 de_fault (to_post_attach
,
731 (void (*) (struct target_ops
*, int))
733 de_fault (to_prepare_to_store
,
734 (void (*) (struct target_ops
*, struct regcache
*))
736 de_fault (deprecated_xfer_memory
,
737 (int (*) (CORE_ADDR
, gdb_byte
*, int, int,
738 struct mem_attrib
*, struct target_ops
*))
740 de_fault (to_files_info
,
741 (void (*) (struct target_ops
*))
743 de_fault (to_can_use_hw_breakpoint
,
744 (int (*) (struct target_ops
*, int, int, int))
746 de_fault (to_insert_hw_breakpoint
,
747 (int (*) (struct target_ops
*, struct gdbarch
*,
748 struct bp_target_info
*))
750 de_fault (to_remove_hw_breakpoint
,
751 (int (*) (struct target_ops
*, struct gdbarch
*,
752 struct bp_target_info
*))
754 de_fault (to_insert_watchpoint
,
755 (int (*) (struct target_ops
*, CORE_ADDR
, int, int,
756 struct expression
*))
758 de_fault (to_remove_watchpoint
,
759 (int (*) (struct target_ops
*, CORE_ADDR
, int, int,
760 struct expression
*))
762 de_fault (to_watchpoint_addr_within_range
,
763 default_watchpoint_addr_within_range
);
764 de_fault (to_region_ok_for_hw_watchpoint
,
765 default_region_ok_for_hw_watchpoint
);
766 de_fault (to_can_accel_watchpoint_condition
,
767 (int (*) (CORE_ADDR
, int, int, struct expression
*))
769 de_fault (to_terminal_init
,
772 de_fault (to_terminal_inferior
,
775 de_fault (to_terminal_ours_for_output
,
778 de_fault (to_terminal_ours
,
781 de_fault (to_terminal_save_ours
,
784 de_fault (to_terminal_info
,
785 default_terminal_info
);
787 (void (*) (char *, int))
789 de_fault (to_post_startup_inferior
,
792 de_fault (to_insert_fork_catchpoint
,
795 de_fault (to_remove_fork_catchpoint
,
798 de_fault (to_insert_vfork_catchpoint
,
801 de_fault (to_remove_vfork_catchpoint
,
804 de_fault (to_insert_exec_catchpoint
,
807 de_fault (to_remove_exec_catchpoint
,
810 de_fault (to_set_syscall_catchpoint
,
811 (int (*) (int, int, int, int, int *))
813 de_fault (to_has_exited
,
814 (int (*) (int, int, int *))
816 de_fault (to_can_run
,
818 de_fault (to_extra_thread_info
,
819 (char *(*) (struct thread_info
*))
821 de_fault (to_thread_name
,
822 (char *(*) (struct thread_info
*))
828 (void (*) (char *, struct ui_file
*))
830 de_fault (to_pid_to_exec_file
,
833 de_fault (to_thread_architecture
,
834 default_thread_architecture
);
835 current_target
.to_read_description
= NULL
;
836 de_fault (to_get_ada_task_ptid
,
837 (ptid_t (*) (long, long))
838 default_get_ada_task_ptid
);
839 de_fault (to_supports_multi_process
,
842 de_fault (to_supports_enable_disable_tracepoint
,
845 de_fault (to_supports_string_tracing
,
848 de_fault (to_trace_init
,
851 de_fault (to_download_tracepoint
,
852 (void (*) (struct bp_location
*))
854 de_fault (to_can_download_tracepoint
,
857 de_fault (to_download_trace_state_variable
,
858 (void (*) (struct trace_state_variable
*))
860 de_fault (to_enable_tracepoint
,
861 (void (*) (struct bp_location
*))
863 de_fault (to_disable_tracepoint
,
864 (void (*) (struct bp_location
*))
866 de_fault (to_trace_set_readonly_regions
,
869 de_fault (to_trace_start
,
872 de_fault (to_get_trace_status
,
873 (int (*) (struct trace_status
*))
875 de_fault (to_get_tracepoint_status
,
876 (void (*) (struct breakpoint
*, struct uploaded_tp
*))
878 de_fault (to_trace_stop
,
881 de_fault (to_trace_find
,
882 (int (*) (enum trace_find_type
, int, CORE_ADDR
, CORE_ADDR
, int *))
884 de_fault (to_get_trace_state_variable_value
,
885 (int (*) (int, LONGEST
*))
887 de_fault (to_save_trace_data
,
888 (int (*) (const char *))
890 de_fault (to_upload_tracepoints
,
891 (int (*) (struct uploaded_tp
**))
893 de_fault (to_upload_trace_state_variables
,
894 (int (*) (struct uploaded_tsv
**))
896 de_fault (to_get_raw_trace_data
,
897 (LONGEST (*) (gdb_byte
*, ULONGEST
, LONGEST
))
899 de_fault (to_get_min_fast_tracepoint_insn_len
,
902 de_fault (to_set_disconnected_tracing
,
905 de_fault (to_set_circular_trace_buffer
,
908 de_fault (to_set_trace_buffer_size
,
911 de_fault (to_set_trace_notes
,
912 (int (*) (const char *, const char *, const char *))
914 de_fault (to_get_tib_address
,
915 (int (*) (ptid_t
, CORE_ADDR
*))
917 de_fault (to_set_permissions
,
920 de_fault (to_static_tracepoint_marker_at
,
921 (int (*) (CORE_ADDR
, struct static_tracepoint_marker
*))
923 de_fault (to_static_tracepoint_markers_by_strid
,
924 (VEC(static_tracepoint_marker_p
) * (*) (const char *))
926 de_fault (to_traceframe_info
,
927 (struct traceframe_info
* (*) (void))
929 de_fault (to_supports_evaluation_of_breakpoint_conditions
,
932 de_fault (to_can_run_breakpoint_commands
,
935 de_fault (to_use_agent
,
938 de_fault (to_can_use_agent
,
941 de_fault (to_augmented_libraries_svr4_read
,
944 de_fault (to_execution_direction
, default_execution_direction
);
948 /* Finally, position the target-stack beneath the squashed
949 "current_target". That way code looking for a non-inherited
950 target method can quickly and simply find it. */
951 current_target
.beneath
= target_stack
;
954 setup_target_debug ();
957 /* Push a new target type into the stack of the existing target accessors,
958 possibly superseding some of the existing accessors.
960 Rather than allow an empty stack, we always have the dummy target at
961 the bottom stratum, so we can call the function vectors without
965 push_target (struct target_ops
*t
)
967 struct target_ops
**cur
;
969 /* Check magic number. If wrong, it probably means someone changed
970 the struct definition, but not all the places that initialize one. */
971 if (t
->to_magic
!= OPS_MAGIC
)
973 fprintf_unfiltered (gdb_stderr
,
974 "Magic number of %s target struct wrong\n",
976 internal_error (__FILE__
, __LINE__
,
977 _("failed internal consistency check"));
980 /* Find the proper stratum to install this target in. */
981 for (cur
= &target_stack
; (*cur
) != NULL
; cur
= &(*cur
)->beneath
)
983 if ((int) (t
->to_stratum
) >= (int) (*cur
)->to_stratum
)
987 /* If there's already targets at this stratum, remove them. */
988 /* FIXME: cagney/2003-10-15: I think this should be popping all
989 targets to CUR, and not just those at this stratum level. */
990 while ((*cur
) != NULL
&& t
->to_stratum
== (*cur
)->to_stratum
)
992 /* There's already something at this stratum level. Close it,
993 and un-hook it from the stack. */
994 struct target_ops
*tmp
= (*cur
);
996 (*cur
) = (*cur
)->beneath
;
1001 /* We have removed all targets in our stratum, now add the new one. */
1002 t
->beneath
= (*cur
);
1005 update_current_target ();
1008 /* Remove a target_ops vector from the stack, wherever it may be.
1009 Return how many times it was removed (0 or 1). */
1012 unpush_target (struct target_ops
*t
)
1014 struct target_ops
**cur
;
1015 struct target_ops
*tmp
;
1017 if (t
->to_stratum
== dummy_stratum
)
1018 internal_error (__FILE__
, __LINE__
,
1019 _("Attempt to unpush the dummy target"));
1021 /* Look for the specified target. Note that we assume that a target
1022 can only occur once in the target stack. */
1024 for (cur
= &target_stack
; (*cur
) != NULL
; cur
= &(*cur
)->beneath
)
1030 /* If we don't find target_ops, quit. Only open targets should be
1035 /* Unchain the target. */
1037 (*cur
) = (*cur
)->beneath
;
1038 tmp
->beneath
= NULL
;
1040 update_current_target ();
1042 /* Finally close the target. Note we do this after unchaining, so
1043 any target method calls from within the target_close
1044 implementation don't end up in T anymore. */
1051 pop_all_targets_above (enum strata above_stratum
)
1053 while ((int) (current_target
.to_stratum
) > (int) above_stratum
)
1055 if (!unpush_target (target_stack
))
1057 fprintf_unfiltered (gdb_stderr
,
1058 "pop_all_targets couldn't find target %s\n",
1059 target_stack
->to_shortname
);
1060 internal_error (__FILE__
, __LINE__
,
1061 _("failed internal consistency check"));
1068 pop_all_targets (void)
1070 pop_all_targets_above (dummy_stratum
);
1073 /* Return 1 if T is now pushed in the target stack. Return 0 otherwise. */
1076 target_is_pushed (struct target_ops
*t
)
1078 struct target_ops
**cur
;
1080 /* Check magic number. If wrong, it probably means someone changed
1081 the struct definition, but not all the places that initialize one. */
1082 if (t
->to_magic
!= OPS_MAGIC
)
1084 fprintf_unfiltered (gdb_stderr
,
1085 "Magic number of %s target struct wrong\n",
1087 internal_error (__FILE__
, __LINE__
,
1088 _("failed internal consistency check"));
1091 for (cur
= &target_stack
; (*cur
) != NULL
; cur
= &(*cur
)->beneath
)
1098 /* Using the objfile specified in OBJFILE, find the address for the
1099 current thread's thread-local storage with offset OFFSET. */
1101 target_translate_tls_address (struct objfile
*objfile
, CORE_ADDR offset
)
1103 volatile CORE_ADDR addr
= 0;
1104 struct target_ops
*target
;
1106 for (target
= current_target
.beneath
;
1108 target
= target
->beneath
)
1110 if (target
->to_get_thread_local_address
!= NULL
)
1115 && gdbarch_fetch_tls_load_module_address_p (target_gdbarch ()))
1117 ptid_t ptid
= inferior_ptid
;
1118 volatile struct gdb_exception ex
;
1120 TRY_CATCH (ex
, RETURN_MASK_ALL
)
1124 /* Fetch the load module address for this objfile. */
1125 lm_addr
= gdbarch_fetch_tls_load_module_address (target_gdbarch (),
1127 /* If it's 0, throw the appropriate exception. */
1129 throw_error (TLS_LOAD_MODULE_NOT_FOUND_ERROR
,
1130 _("TLS load module not found"));
1132 addr
= target
->to_get_thread_local_address (target
, ptid
,
1135 /* If an error occurred, print TLS related messages here. Otherwise,
1136 throw the error to some higher catcher. */
1139 int objfile_is_library
= (objfile
->flags
& OBJF_SHARED
);
1143 case TLS_NO_LIBRARY_SUPPORT_ERROR
:
1144 error (_("Cannot find thread-local variables "
1145 "in this thread library."));
1147 case TLS_LOAD_MODULE_NOT_FOUND_ERROR
:
1148 if (objfile_is_library
)
1149 error (_("Cannot find shared library `%s' in dynamic"
1150 " linker's load module list"), objfile_name (objfile
));
1152 error (_("Cannot find executable file `%s' in dynamic"
1153 " linker's load module list"), objfile_name (objfile
));
1155 case TLS_NOT_ALLOCATED_YET_ERROR
:
1156 if (objfile_is_library
)
1157 error (_("The inferior has not yet allocated storage for"
1158 " thread-local variables in\n"
1159 "the shared library `%s'\n"
1161 objfile_name (objfile
), target_pid_to_str (ptid
));
1163 error (_("The inferior has not yet allocated storage for"
1164 " thread-local variables in\n"
1165 "the executable `%s'\n"
1167 objfile_name (objfile
), target_pid_to_str (ptid
));
1169 case TLS_GENERIC_ERROR
:
1170 if (objfile_is_library
)
1171 error (_("Cannot find thread-local storage for %s, "
1172 "shared library %s:\n%s"),
1173 target_pid_to_str (ptid
),
1174 objfile_name (objfile
), ex
.message
);
1176 error (_("Cannot find thread-local storage for %s, "
1177 "executable file %s:\n%s"),
1178 target_pid_to_str (ptid
),
1179 objfile_name (objfile
), ex
.message
);
1182 throw_exception (ex
);
1187 /* It wouldn't be wrong here to try a gdbarch method, too; finding
1188 TLS is an ABI-specific thing. But we don't do that yet. */
1190 error (_("Cannot find thread-local variables on this target"));
1196 target_xfer_status_to_string (enum target_xfer_status err
)
1198 #define CASE(X) case X: return #X
1201 CASE(TARGET_XFER_E_IO
);
1202 CASE(TARGET_XFER_E_UNAVAILABLE
);
1211 #define MIN(A, B) (((A) <= (B)) ? (A) : (B))
1213 /* target_read_string -- read a null terminated string, up to LEN bytes,
1214 from MEMADDR in target. Set *ERRNOP to the errno code, or 0 if successful.
1215 Set *STRING to a pointer to malloc'd memory containing the data; the caller
1216 is responsible for freeing it. Return the number of bytes successfully
1220 target_read_string (CORE_ADDR memaddr
, char **string
, int len
, int *errnop
)
1222 int tlen
, offset
, i
;
1226 int buffer_allocated
;
1228 unsigned int nbytes_read
= 0;
1230 gdb_assert (string
);
1232 /* Small for testing. */
1233 buffer_allocated
= 4;
1234 buffer
= xmalloc (buffer_allocated
);
1239 tlen
= MIN (len
, 4 - (memaddr
& 3));
1240 offset
= memaddr
& 3;
1242 errcode
= target_read_memory (memaddr
& ~3, buf
, sizeof buf
);
1245 /* The transfer request might have crossed the boundary to an
1246 unallocated region of memory. Retry the transfer, requesting
1250 errcode
= target_read_memory (memaddr
, buf
, 1);
1255 if (bufptr
- buffer
+ tlen
> buffer_allocated
)
1259 bytes
= bufptr
- buffer
;
1260 buffer_allocated
*= 2;
1261 buffer
= xrealloc (buffer
, buffer_allocated
);
1262 bufptr
= buffer
+ bytes
;
1265 for (i
= 0; i
< tlen
; i
++)
1267 *bufptr
++ = buf
[i
+ offset
];
1268 if (buf
[i
+ offset
] == '\000')
1270 nbytes_read
+= i
+ 1;
1277 nbytes_read
+= tlen
;
1286 struct target_section_table
*
1287 target_get_section_table (struct target_ops
*target
)
1289 struct target_ops
*t
;
1292 fprintf_unfiltered (gdb_stdlog
, "target_get_section_table ()\n");
1294 for (t
= target
; t
!= NULL
; t
= t
->beneath
)
1295 if (t
->to_get_section_table
!= NULL
)
1296 return (*t
->to_get_section_table
) (t
);
1301 /* Find a section containing ADDR. */
1303 struct target_section
*
1304 target_section_by_addr (struct target_ops
*target
, CORE_ADDR addr
)
1306 struct target_section_table
*table
= target_get_section_table (target
);
1307 struct target_section
*secp
;
1312 for (secp
= table
->sections
; secp
< table
->sections_end
; secp
++)
1314 if (addr
>= secp
->addr
&& addr
< secp
->endaddr
)
1320 /* Read memory from the live target, even if currently inspecting a
1321 traceframe. The return is the same as that of target_read. */
1323 static enum target_xfer_status
1324 target_read_live_memory (enum target_object object
,
1325 ULONGEST memaddr
, gdb_byte
*myaddr
, ULONGEST len
,
1326 ULONGEST
*xfered_len
)
1328 enum target_xfer_status ret
;
1329 struct cleanup
*cleanup
;
1331 /* Switch momentarily out of tfind mode so to access live memory.
1332 Note that this must not clear global state, such as the frame
1333 cache, which must still remain valid for the previous traceframe.
1334 We may be _building_ the frame cache at this point. */
1335 cleanup
= make_cleanup_restore_traceframe_number ();
1336 set_traceframe_number (-1);
1338 ret
= target_xfer_partial (current_target
.beneath
, object
, NULL
,
1339 myaddr
, NULL
, memaddr
, len
, xfered_len
);
1341 do_cleanups (cleanup
);
1345 /* Using the set of read-only target sections of OPS, read live
1346 read-only memory. Note that the actual reads start from the
1347 top-most target again.
1349 For interface/parameters/return description see target.h,
1352 static enum target_xfer_status
1353 memory_xfer_live_readonly_partial (struct target_ops
*ops
,
1354 enum target_object object
,
1355 gdb_byte
*readbuf
, ULONGEST memaddr
,
1356 ULONGEST len
, ULONGEST
*xfered_len
)
1358 struct target_section
*secp
;
1359 struct target_section_table
*table
;
1361 secp
= target_section_by_addr (ops
, memaddr
);
1363 && (bfd_get_section_flags (secp
->the_bfd_section
->owner
,
1364 secp
->the_bfd_section
)
1367 struct target_section
*p
;
1368 ULONGEST memend
= memaddr
+ len
;
1370 table
= target_get_section_table (ops
);
1372 for (p
= table
->sections
; p
< table
->sections_end
; p
++)
1374 if (memaddr
>= p
->addr
)
1376 if (memend
<= p
->endaddr
)
1378 /* Entire transfer is within this section. */
1379 return target_read_live_memory (object
, memaddr
,
1380 readbuf
, len
, xfered_len
);
1382 else if (memaddr
>= p
->endaddr
)
1384 /* This section ends before the transfer starts. */
1389 /* This section overlaps the transfer. Just do half. */
1390 len
= p
->endaddr
- memaddr
;
1391 return target_read_live_memory (object
, memaddr
,
1392 readbuf
, len
, xfered_len
);
1398 return TARGET_XFER_EOF
;
1401 /* Read memory from more than one valid target. A core file, for
1402 instance, could have some of memory but delegate other bits to
1403 the target below it. So, we must manually try all targets. */
1405 static enum target_xfer_status
1406 raw_memory_xfer_partial (struct target_ops
*ops
, gdb_byte
*readbuf
,
1407 const gdb_byte
*writebuf
, ULONGEST memaddr
, LONGEST len
,
1408 ULONGEST
*xfered_len
)
1410 enum target_xfer_status res
;
1414 res
= ops
->to_xfer_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1415 readbuf
, writebuf
, memaddr
, len
,
1417 if (res
== TARGET_XFER_OK
)
1420 /* Stop if the target reports that the memory is not available. */
1421 if (res
== TARGET_XFER_E_UNAVAILABLE
)
1424 /* We want to continue past core files to executables, but not
1425 past a running target's memory. */
1426 if (ops
->to_has_all_memory (ops
))
1431 while (ops
!= NULL
);
1436 /* Perform a partial memory transfer.
1437 For docs see target.h, to_xfer_partial. */
1439 static enum target_xfer_status
1440 memory_xfer_partial_1 (struct target_ops
*ops
, enum target_object object
,
1441 gdb_byte
*readbuf
, const gdb_byte
*writebuf
, ULONGEST memaddr
,
1442 ULONGEST len
, ULONGEST
*xfered_len
)
1444 enum target_xfer_status res
;
1446 struct mem_region
*region
;
1447 struct inferior
*inf
;
1449 /* For accesses to unmapped overlay sections, read directly from
1450 files. Must do this first, as MEMADDR may need adjustment. */
1451 if (readbuf
!= NULL
&& overlay_debugging
)
1453 struct obj_section
*section
= find_pc_overlay (memaddr
);
1455 if (pc_in_unmapped_range (memaddr
, section
))
1457 struct target_section_table
*table
1458 = target_get_section_table (ops
);
1459 const char *section_name
= section
->the_bfd_section
->name
;
1461 memaddr
= overlay_mapped_address (memaddr
, section
);
1462 return section_table_xfer_memory_partial (readbuf
, writebuf
,
1463 memaddr
, len
, xfered_len
,
1465 table
->sections_end
,
1470 /* Try the executable files, if "trust-readonly-sections" is set. */
1471 if (readbuf
!= NULL
&& trust_readonly
)
1473 struct target_section
*secp
;
1474 struct target_section_table
*table
;
1476 secp
= target_section_by_addr (ops
, memaddr
);
1478 && (bfd_get_section_flags (secp
->the_bfd_section
->owner
,
1479 secp
->the_bfd_section
)
1482 table
= target_get_section_table (ops
);
1483 return section_table_xfer_memory_partial (readbuf
, writebuf
,
1484 memaddr
, len
, xfered_len
,
1486 table
->sections_end
,
1491 /* If reading unavailable memory in the context of traceframes, and
1492 this address falls within a read-only section, fallback to
1493 reading from live memory. */
1494 if (readbuf
!= NULL
&& get_traceframe_number () != -1)
1496 VEC(mem_range_s
) *available
;
1498 /* If we fail to get the set of available memory, then the
1499 target does not support querying traceframe info, and so we
1500 attempt reading from the traceframe anyway (assuming the
1501 target implements the old QTro packet then). */
1502 if (traceframe_available_memory (&available
, memaddr
, len
))
1504 struct cleanup
*old_chain
;
1506 old_chain
= make_cleanup (VEC_cleanup(mem_range_s
), &available
);
1508 if (VEC_empty (mem_range_s
, available
)
1509 || VEC_index (mem_range_s
, available
, 0)->start
!= memaddr
)
1511 /* Don't read into the traceframe's available
1513 if (!VEC_empty (mem_range_s
, available
))
1515 LONGEST oldlen
= len
;
1517 len
= VEC_index (mem_range_s
, available
, 0)->start
- memaddr
;
1518 gdb_assert (len
<= oldlen
);
1521 do_cleanups (old_chain
);
1523 /* This goes through the topmost target again. */
1524 res
= memory_xfer_live_readonly_partial (ops
, object
,
1527 if (res
== TARGET_XFER_OK
)
1528 return TARGET_XFER_OK
;
1531 /* No use trying further, we know some memory starting
1532 at MEMADDR isn't available. */
1534 return TARGET_XFER_E_UNAVAILABLE
;
1538 /* Don't try to read more than how much is available, in
1539 case the target implements the deprecated QTro packet to
1540 cater for older GDBs (the target's knowledge of read-only
1541 sections may be outdated by now). */
1542 len
= VEC_index (mem_range_s
, available
, 0)->length
;
1544 do_cleanups (old_chain
);
1548 /* Try GDB's internal data cache. */
1549 region
= lookup_mem_region (memaddr
);
1550 /* region->hi == 0 means there's no upper bound. */
1551 if (memaddr
+ len
< region
->hi
|| region
->hi
== 0)
1554 reg_len
= region
->hi
- memaddr
;
1556 switch (region
->attrib
.mode
)
1559 if (writebuf
!= NULL
)
1560 return TARGET_XFER_E_IO
;
1564 if (readbuf
!= NULL
)
1565 return TARGET_XFER_E_IO
;
1569 /* We only support writing to flash during "load" for now. */
1570 if (writebuf
!= NULL
)
1571 error (_("Writing to flash memory forbidden in this context"));
1575 return TARGET_XFER_E_IO
;
1578 if (!ptid_equal (inferior_ptid
, null_ptid
))
1579 inf
= find_inferior_pid (ptid_get_pid (inferior_ptid
));
1584 /* The dcache reads whole cache lines; that doesn't play well
1585 with reading from a trace buffer, because reading outside of
1586 the collected memory range fails. */
1587 && get_traceframe_number () == -1
1588 && (region
->attrib
.cache
1589 || (stack_cache_enabled_p () && object
== TARGET_OBJECT_STACK_MEMORY
)
1590 || (code_cache_enabled_p () && object
== TARGET_OBJECT_CODE_MEMORY
)))
1592 DCACHE
*dcache
= target_dcache_get_or_init ();
1595 if (readbuf
!= NULL
)
1596 l
= dcache_xfer_memory (ops
, dcache
, memaddr
, readbuf
, reg_len
, 0);
1598 /* FIXME drow/2006-08-09: If we're going to preserve const
1599 correctness dcache_xfer_memory should take readbuf and
1601 l
= dcache_xfer_memory (ops
, dcache
, memaddr
, (void *) writebuf
,
1604 return TARGET_XFER_E_IO
;
1607 *xfered_len
= (ULONGEST
) l
;
1608 return TARGET_XFER_OK
;
1612 /* If none of those methods found the memory we wanted, fall back
1613 to a target partial transfer. Normally a single call to
1614 to_xfer_partial is enough; if it doesn't recognize an object
1615 it will call the to_xfer_partial of the next target down.
1616 But for memory this won't do. Memory is the only target
1617 object which can be read from more than one valid target.
1618 A core file, for instance, could have some of memory but
1619 delegate other bits to the target below it. So, we must
1620 manually try all targets. */
1622 res
= raw_memory_xfer_partial (ops
, readbuf
, writebuf
, memaddr
, reg_len
,
1625 /* Make sure the cache gets updated no matter what - if we are writing
1626 to the stack. Even if this write is not tagged as such, we still need
1627 to update the cache. */
1629 if (res
== TARGET_XFER_OK
1632 && target_dcache_init_p ()
1633 && !region
->attrib
.cache
1634 && ((stack_cache_enabled_p () && object
!= TARGET_OBJECT_STACK_MEMORY
)
1635 || (code_cache_enabled_p () && object
!= TARGET_OBJECT_CODE_MEMORY
)))
1637 DCACHE
*dcache
= target_dcache_get ();
1639 dcache_update (dcache
, memaddr
, (void *) writebuf
, reg_len
);
1642 /* If we still haven't got anything, return the last error. We
1647 /* Perform a partial memory transfer. For docs see target.h,
1650 static enum target_xfer_status
1651 memory_xfer_partial (struct target_ops
*ops
, enum target_object object
,
1652 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1653 ULONGEST memaddr
, ULONGEST len
, ULONGEST
*xfered_len
)
1655 enum target_xfer_status res
;
1657 /* Zero length requests are ok and require no work. */
1659 return TARGET_XFER_EOF
;
1661 /* Fill in READBUF with breakpoint shadows, or WRITEBUF with
1662 breakpoint insns, thus hiding out from higher layers whether
1663 there are software breakpoints inserted in the code stream. */
1664 if (readbuf
!= NULL
)
1666 res
= memory_xfer_partial_1 (ops
, object
, readbuf
, NULL
, memaddr
, len
,
1669 if (res
== TARGET_XFER_OK
&& !show_memory_breakpoints
)
1670 breakpoint_xfer_memory (readbuf
, NULL
, NULL
, memaddr
, res
);
1675 struct cleanup
*old_chain
;
1677 /* A large write request is likely to be partially satisfied
1678 by memory_xfer_partial_1. We will continually malloc
1679 and free a copy of the entire write request for breakpoint
1680 shadow handling even though we only end up writing a small
1681 subset of it. Cap writes to 4KB to mitigate this. */
1682 len
= min (4096, len
);
1684 buf
= xmalloc (len
);
1685 old_chain
= make_cleanup (xfree
, buf
);
1686 memcpy (buf
, writebuf
, len
);
1688 breakpoint_xfer_memory (NULL
, buf
, writebuf
, memaddr
, len
);
1689 res
= memory_xfer_partial_1 (ops
, object
, NULL
, buf
, memaddr
, len
,
1692 do_cleanups (old_chain
);
1699 restore_show_memory_breakpoints (void *arg
)
1701 show_memory_breakpoints
= (uintptr_t) arg
;
1705 make_show_memory_breakpoints_cleanup (int show
)
1707 int current
= show_memory_breakpoints
;
1709 show_memory_breakpoints
= show
;
1710 return make_cleanup (restore_show_memory_breakpoints
,
1711 (void *) (uintptr_t) current
);
1714 /* For docs see target.h, to_xfer_partial. */
1716 enum target_xfer_status
1717 target_xfer_partial (struct target_ops
*ops
,
1718 enum target_object object
, const char *annex
,
1719 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1720 ULONGEST offset
, ULONGEST len
,
1721 ULONGEST
*xfered_len
)
1723 enum target_xfer_status retval
;
1725 gdb_assert (ops
->to_xfer_partial
!= NULL
);
1727 /* Transfer is done when LEN is zero. */
1729 return TARGET_XFER_EOF
;
1731 if (writebuf
&& !may_write_memory
)
1732 error (_("Writing to memory is not allowed (addr %s, len %s)"),
1733 core_addr_to_string_nz (offset
), plongest (len
));
1737 /* If this is a memory transfer, let the memory-specific code
1738 have a look at it instead. Memory transfers are more
1740 if (object
== TARGET_OBJECT_MEMORY
|| object
== TARGET_OBJECT_STACK_MEMORY
1741 || object
== TARGET_OBJECT_CODE_MEMORY
)
1742 retval
= memory_xfer_partial (ops
, object
, readbuf
,
1743 writebuf
, offset
, len
, xfered_len
);
1744 else if (object
== TARGET_OBJECT_RAW_MEMORY
)
1746 /* Request the normal memory object from other layers. */
1747 retval
= raw_memory_xfer_partial (ops
, readbuf
, writebuf
, offset
, len
,
1751 retval
= ops
->to_xfer_partial (ops
, object
, annex
, readbuf
,
1752 writebuf
, offset
, len
, xfered_len
);
1756 const unsigned char *myaddr
= NULL
;
1758 fprintf_unfiltered (gdb_stdlog
,
1759 "%s:target_xfer_partial "
1760 "(%d, %s, %s, %s, %s, %s) = %d, %s",
1763 (annex
? annex
: "(null)"),
1764 host_address_to_string (readbuf
),
1765 host_address_to_string (writebuf
),
1766 core_addr_to_string_nz (offset
),
1767 pulongest (len
), retval
,
1768 pulongest (*xfered_len
));
1774 if (retval
== TARGET_XFER_OK
&& myaddr
!= NULL
)
1778 fputs_unfiltered (", bytes =", gdb_stdlog
);
1779 for (i
= 0; i
< *xfered_len
; i
++)
1781 if ((((intptr_t) &(myaddr
[i
])) & 0xf) == 0)
1783 if (targetdebug
< 2 && i
> 0)
1785 fprintf_unfiltered (gdb_stdlog
, " ...");
1788 fprintf_unfiltered (gdb_stdlog
, "\n");
1791 fprintf_unfiltered (gdb_stdlog
, " %02x", myaddr
[i
] & 0xff);
1795 fputc_unfiltered ('\n', gdb_stdlog
);
1798 /* Check implementations of to_xfer_partial update *XFERED_LEN
1799 properly. Do assertion after printing debug messages, so that we
1800 can find more clues on assertion failure from debugging messages. */
1801 if (retval
== TARGET_XFER_OK
|| retval
== TARGET_XFER_E_UNAVAILABLE
)
1802 gdb_assert (*xfered_len
> 0);
1807 /* Read LEN bytes of target memory at address MEMADDR, placing the
1808 results in GDB's memory at MYADDR. Returns either 0 for success or
1809 TARGET_XFER_E_IO if any error occurs.
1811 If an error occurs, no guarantee is made about the contents of the data at
1812 MYADDR. In particular, the caller should not depend upon partial reads
1813 filling the buffer with good data. There is no way for the caller to know
1814 how much good data might have been transfered anyway. Callers that can
1815 deal with partial reads should call target_read (which will retry until
1816 it makes no progress, and then return how much was transferred). */
1819 target_read_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1821 /* Dispatch to the topmost target, not the flattened current_target.
1822 Memory accesses check target->to_has_(all_)memory, and the
1823 flattened target doesn't inherit those. */
1824 if (target_read (current_target
.beneath
, TARGET_OBJECT_MEMORY
, NULL
,
1825 myaddr
, memaddr
, len
) == len
)
1828 return TARGET_XFER_E_IO
;
1831 /* Like target_read_memory, but specify explicitly that this is a read
1832 from the target's raw memory. That is, this read bypasses the
1833 dcache, breakpoint shadowing, etc. */
1836 target_read_raw_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1838 /* See comment in target_read_memory about why the request starts at
1839 current_target.beneath. */
1840 if (target_read (current_target
.beneath
, TARGET_OBJECT_RAW_MEMORY
, NULL
,
1841 myaddr
, memaddr
, len
) == len
)
1844 return TARGET_XFER_E_IO
;
1847 /* Like target_read_memory, but specify explicitly that this is a read from
1848 the target's stack. This may trigger different cache behavior. */
1851 target_read_stack (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1853 /* See comment in target_read_memory about why the request starts at
1854 current_target.beneath. */
1855 if (target_read (current_target
.beneath
, TARGET_OBJECT_STACK_MEMORY
, NULL
,
1856 myaddr
, memaddr
, len
) == len
)
1859 return TARGET_XFER_E_IO
;
1862 /* Like target_read_memory, but specify explicitly that this is a read from
1863 the target's code. This may trigger different cache behavior. */
1866 target_read_code (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1868 /* See comment in target_read_memory about why the request starts at
1869 current_target.beneath. */
1870 if (target_read (current_target
.beneath
, TARGET_OBJECT_CODE_MEMORY
, NULL
,
1871 myaddr
, memaddr
, len
) == len
)
1874 return TARGET_XFER_E_IO
;
1877 /* Write LEN bytes from MYADDR to target memory at address MEMADDR.
1878 Returns either 0 for success or TARGET_XFER_E_IO if any
1879 error occurs. If an error occurs, no guarantee is made about how
1880 much data got written. Callers that can deal with partial writes
1881 should call target_write. */
1884 target_write_memory (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ssize_t len
)
1886 /* See comment in target_read_memory about why the request starts at
1887 current_target.beneath. */
1888 if (target_write (current_target
.beneath
, TARGET_OBJECT_MEMORY
, NULL
,
1889 myaddr
, memaddr
, len
) == len
)
1892 return TARGET_XFER_E_IO
;
1895 /* Write LEN bytes from MYADDR to target raw memory at address
1896 MEMADDR. Returns either 0 for success or TARGET_XFER_E_IO
1897 if any error occurs. If an error occurs, no guarantee is made
1898 about how much data got written. Callers that can deal with
1899 partial writes should call target_write. */
1902 target_write_raw_memory (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ssize_t len
)
1904 /* See comment in target_read_memory about why the request starts at
1905 current_target.beneath. */
1906 if (target_write (current_target
.beneath
, TARGET_OBJECT_RAW_MEMORY
, NULL
,
1907 myaddr
, memaddr
, len
) == len
)
1910 return TARGET_XFER_E_IO
;
1913 /* Fetch the target's memory map. */
1916 target_memory_map (void)
1918 VEC(mem_region_s
) *result
;
1919 struct mem_region
*last_one
, *this_one
;
1921 struct target_ops
*t
;
1924 fprintf_unfiltered (gdb_stdlog
, "target_memory_map ()\n");
1926 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
1927 if (t
->to_memory_map
!= NULL
)
1933 result
= t
->to_memory_map (t
);
1937 qsort (VEC_address (mem_region_s
, result
),
1938 VEC_length (mem_region_s
, result
),
1939 sizeof (struct mem_region
), mem_region_cmp
);
1941 /* Check that regions do not overlap. Simultaneously assign
1942 a numbering for the "mem" commands to use to refer to
1945 for (ix
= 0; VEC_iterate (mem_region_s
, result
, ix
, this_one
); ix
++)
1947 this_one
->number
= ix
;
1949 if (last_one
&& last_one
->hi
> this_one
->lo
)
1951 warning (_("Overlapping regions in memory map: ignoring"));
1952 VEC_free (mem_region_s
, result
);
1955 last_one
= this_one
;
1962 target_flash_erase (ULONGEST address
, LONGEST length
)
1964 struct target_ops
*t
;
1966 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
1967 if (t
->to_flash_erase
!= NULL
)
1970 fprintf_unfiltered (gdb_stdlog
, "target_flash_erase (%s, %s)\n",
1971 hex_string (address
), phex (length
, 0));
1972 t
->to_flash_erase (t
, address
, length
);
1980 target_flash_done (void)
1982 struct target_ops
*t
;
1984 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
1985 if (t
->to_flash_done
!= NULL
)
1988 fprintf_unfiltered (gdb_stdlog
, "target_flash_done\n");
1989 t
->to_flash_done (t
);
1997 show_trust_readonly (struct ui_file
*file
, int from_tty
,
1998 struct cmd_list_element
*c
, const char *value
)
2000 fprintf_filtered (file
,
2001 _("Mode for reading from readonly sections is %s.\n"),
2005 /* More generic transfers. */
2007 static enum target_xfer_status
2008 default_xfer_partial (struct target_ops
*ops
, enum target_object object
,
2009 const char *annex
, gdb_byte
*readbuf
,
2010 const gdb_byte
*writebuf
, ULONGEST offset
, ULONGEST len
,
2011 ULONGEST
*xfered_len
)
2013 if (object
== TARGET_OBJECT_MEMORY
2014 && ops
->deprecated_xfer_memory
!= NULL
)
2015 /* If available, fall back to the target's
2016 "deprecated_xfer_memory" method. */
2021 if (writebuf
!= NULL
)
2023 void *buffer
= xmalloc (len
);
2024 struct cleanup
*cleanup
= make_cleanup (xfree
, buffer
);
2026 memcpy (buffer
, writebuf
, len
);
2027 xfered
= ops
->deprecated_xfer_memory (offset
, buffer
, len
,
2028 1/*write*/, NULL
, ops
);
2029 do_cleanups (cleanup
);
2031 if (readbuf
!= NULL
)
2032 xfered
= ops
->deprecated_xfer_memory (offset
, readbuf
, len
,
2033 0/*read*/, NULL
, ops
);
2036 *xfered_len
= (ULONGEST
) xfered
;
2037 return TARGET_XFER_E_IO
;
2039 else if (xfered
== 0 && errno
== 0)
2040 /* "deprecated_xfer_memory" uses 0, cross checked against
2041 ERRNO as one indication of an error. */
2042 return TARGET_XFER_EOF
;
2044 return TARGET_XFER_E_IO
;
2048 gdb_assert (ops
->beneath
!= NULL
);
2049 return ops
->beneath
->to_xfer_partial (ops
->beneath
, object
, annex
,
2050 readbuf
, writebuf
, offset
, len
,
2055 /* Target vector read/write partial wrapper functions. */
2057 static enum target_xfer_status
2058 target_read_partial (struct target_ops
*ops
,
2059 enum target_object object
,
2060 const char *annex
, gdb_byte
*buf
,
2061 ULONGEST offset
, ULONGEST len
,
2062 ULONGEST
*xfered_len
)
2064 return target_xfer_partial (ops
, object
, annex
, buf
, NULL
, offset
, len
,
2068 static enum target_xfer_status
2069 target_write_partial (struct target_ops
*ops
,
2070 enum target_object object
,
2071 const char *annex
, const gdb_byte
*buf
,
2072 ULONGEST offset
, LONGEST len
, ULONGEST
*xfered_len
)
2074 return target_xfer_partial (ops
, object
, annex
, NULL
, buf
, offset
, len
,
2078 /* Wrappers to perform the full transfer. */
2080 /* For docs on target_read see target.h. */
2083 target_read (struct target_ops
*ops
,
2084 enum target_object object
,
2085 const char *annex
, gdb_byte
*buf
,
2086 ULONGEST offset
, LONGEST len
)
2090 while (xfered
< len
)
2092 ULONGEST xfered_len
;
2093 enum target_xfer_status status
;
2095 status
= target_read_partial (ops
, object
, annex
,
2096 (gdb_byte
*) buf
+ xfered
,
2097 offset
+ xfered
, len
- xfered
,
2100 /* Call an observer, notifying them of the xfer progress? */
2101 if (status
== TARGET_XFER_EOF
)
2103 else if (status
== TARGET_XFER_OK
)
2105 xfered
+= xfered_len
;
2115 /* Assuming that the entire [begin, end) range of memory cannot be
2116 read, try to read whatever subrange is possible to read.
2118 The function returns, in RESULT, either zero or one memory block.
2119 If there's a readable subrange at the beginning, it is completely
2120 read and returned. Any further readable subrange will not be read.
2121 Otherwise, if there's a readable subrange at the end, it will be
2122 completely read and returned. Any readable subranges before it
2123 (obviously, not starting at the beginning), will be ignored. In
2124 other cases -- either no readable subrange, or readable subrange(s)
2125 that is neither at the beginning, or end, nothing is returned.
2127 The purpose of this function is to handle a read across a boundary
2128 of accessible memory in a case when memory map is not available.
2129 The above restrictions are fine for this case, but will give
2130 incorrect results if the memory is 'patchy'. However, supporting
2131 'patchy' memory would require trying to read every single byte,
2132 and it seems unacceptable solution. Explicit memory map is
2133 recommended for this case -- and target_read_memory_robust will
2134 take care of reading multiple ranges then. */
2137 read_whatever_is_readable (struct target_ops
*ops
,
2138 ULONGEST begin
, ULONGEST end
,
2139 VEC(memory_read_result_s
) **result
)
2141 gdb_byte
*buf
= xmalloc (end
- begin
);
2142 ULONGEST current_begin
= begin
;
2143 ULONGEST current_end
= end
;
2145 memory_read_result_s r
;
2146 ULONGEST xfered_len
;
2148 /* If we previously failed to read 1 byte, nothing can be done here. */
2149 if (end
- begin
<= 1)
2155 /* Check that either first or the last byte is readable, and give up
2156 if not. This heuristic is meant to permit reading accessible memory
2157 at the boundary of accessible region. */
2158 if (target_read_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2159 buf
, begin
, 1, &xfered_len
) == TARGET_XFER_OK
)
2164 else if (target_read_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2165 buf
+ (end
-begin
) - 1, end
- 1, 1,
2166 &xfered_len
) == TARGET_XFER_OK
)
2177 /* Loop invariant is that the [current_begin, current_end) was previously
2178 found to be not readable as a whole.
2180 Note loop condition -- if the range has 1 byte, we can't divide the range
2181 so there's no point trying further. */
2182 while (current_end
- current_begin
> 1)
2184 ULONGEST first_half_begin
, first_half_end
;
2185 ULONGEST second_half_begin
, second_half_end
;
2187 ULONGEST middle
= current_begin
+ (current_end
- current_begin
)/2;
2191 first_half_begin
= current_begin
;
2192 first_half_end
= middle
;
2193 second_half_begin
= middle
;
2194 second_half_end
= current_end
;
2198 first_half_begin
= middle
;
2199 first_half_end
= current_end
;
2200 second_half_begin
= current_begin
;
2201 second_half_end
= middle
;
2204 xfer
= target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2205 buf
+ (first_half_begin
- begin
),
2207 first_half_end
- first_half_begin
);
2209 if (xfer
== first_half_end
- first_half_begin
)
2211 /* This half reads up fine. So, the error must be in the
2213 current_begin
= second_half_begin
;
2214 current_end
= second_half_end
;
2218 /* This half is not readable. Because we've tried one byte, we
2219 know some part of this half if actually redable. Go to the next
2220 iteration to divide again and try to read.
2222 We don't handle the other half, because this function only tries
2223 to read a single readable subrange. */
2224 current_begin
= first_half_begin
;
2225 current_end
= first_half_end
;
2231 /* The [begin, current_begin) range has been read. */
2233 r
.end
= current_begin
;
2238 /* The [current_end, end) range has been read. */
2239 LONGEST rlen
= end
- current_end
;
2241 r
.data
= xmalloc (rlen
);
2242 memcpy (r
.data
, buf
+ current_end
- begin
, rlen
);
2243 r
.begin
= current_end
;
2247 VEC_safe_push(memory_read_result_s
, (*result
), &r
);
2251 free_memory_read_result_vector (void *x
)
2253 VEC(memory_read_result_s
) *v
= x
;
2254 memory_read_result_s
*current
;
2257 for (ix
= 0; VEC_iterate (memory_read_result_s
, v
, ix
, current
); ++ix
)
2259 xfree (current
->data
);
2261 VEC_free (memory_read_result_s
, v
);
2264 VEC(memory_read_result_s
) *
2265 read_memory_robust (struct target_ops
*ops
, ULONGEST offset
, LONGEST len
)
2267 VEC(memory_read_result_s
) *result
= 0;
2270 while (xfered
< len
)
2272 struct mem_region
*region
= lookup_mem_region (offset
+ xfered
);
2275 /* If there is no explicit region, a fake one should be created. */
2276 gdb_assert (region
);
2278 if (region
->hi
== 0)
2279 rlen
= len
- xfered
;
2281 rlen
= region
->hi
- offset
;
2283 if (region
->attrib
.mode
== MEM_NONE
|| region
->attrib
.mode
== MEM_WO
)
2285 /* Cannot read this region. Note that we can end up here only
2286 if the region is explicitly marked inaccessible, or
2287 'inaccessible-by-default' is in effect. */
2292 LONGEST to_read
= min (len
- xfered
, rlen
);
2293 gdb_byte
*buffer
= (gdb_byte
*)xmalloc (to_read
);
2295 LONGEST xfer
= target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2296 (gdb_byte
*) buffer
,
2297 offset
+ xfered
, to_read
);
2298 /* Call an observer, notifying them of the xfer progress? */
2301 /* Got an error reading full chunk. See if maybe we can read
2304 read_whatever_is_readable (ops
, offset
+ xfered
,
2305 offset
+ xfered
+ to_read
, &result
);
2310 struct memory_read_result r
;
2312 r
.begin
= offset
+ xfered
;
2313 r
.end
= r
.begin
+ xfer
;
2314 VEC_safe_push (memory_read_result_s
, result
, &r
);
2324 /* An alternative to target_write with progress callbacks. */
2327 target_write_with_progress (struct target_ops
*ops
,
2328 enum target_object object
,
2329 const char *annex
, const gdb_byte
*buf
,
2330 ULONGEST offset
, LONGEST len
,
2331 void (*progress
) (ULONGEST
, void *), void *baton
)
2335 /* Give the progress callback a chance to set up. */
2337 (*progress
) (0, baton
);
2339 while (xfered
< len
)
2341 ULONGEST xfered_len
;
2342 enum target_xfer_status status
;
2344 status
= target_write_partial (ops
, object
, annex
,
2345 (gdb_byte
*) buf
+ xfered
,
2346 offset
+ xfered
, len
- xfered
,
2349 if (status
== TARGET_XFER_EOF
)
2351 if (TARGET_XFER_STATUS_ERROR_P (status
))
2354 gdb_assert (status
== TARGET_XFER_OK
);
2356 (*progress
) (xfered_len
, baton
);
2358 xfered
+= xfered_len
;
2364 /* For docs on target_write see target.h. */
2367 target_write (struct target_ops
*ops
,
2368 enum target_object object
,
2369 const char *annex
, const gdb_byte
*buf
,
2370 ULONGEST offset
, LONGEST len
)
2372 return target_write_with_progress (ops
, object
, annex
, buf
, offset
, len
,
2376 /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return
2377 the size of the transferred data. PADDING additional bytes are
2378 available in *BUF_P. This is a helper function for
2379 target_read_alloc; see the declaration of that function for more
2383 target_read_alloc_1 (struct target_ops
*ops
, enum target_object object
,
2384 const char *annex
, gdb_byte
**buf_p
, int padding
)
2386 size_t buf_alloc
, buf_pos
;
2389 /* This function does not have a length parameter; it reads the
2390 entire OBJECT). Also, it doesn't support objects fetched partly
2391 from one target and partly from another (in a different stratum,
2392 e.g. a core file and an executable). Both reasons make it
2393 unsuitable for reading memory. */
2394 gdb_assert (object
!= TARGET_OBJECT_MEMORY
);
2396 /* Start by reading up to 4K at a time. The target will throttle
2397 this number down if necessary. */
2399 buf
= xmalloc (buf_alloc
);
2403 ULONGEST xfered_len
;
2404 enum target_xfer_status status
;
2406 status
= target_read_partial (ops
, object
, annex
, &buf
[buf_pos
],
2407 buf_pos
, buf_alloc
- buf_pos
- padding
,
2410 if (status
== TARGET_XFER_EOF
)
2412 /* Read all there was. */
2419 else if (status
!= TARGET_XFER_OK
)
2421 /* An error occurred. */
2423 return TARGET_XFER_E_IO
;
2426 buf_pos
+= xfered_len
;
2428 /* If the buffer is filling up, expand it. */
2429 if (buf_alloc
< buf_pos
* 2)
2432 buf
= xrealloc (buf
, buf_alloc
);
2439 /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return
2440 the size of the transferred data. See the declaration in "target.h"
2441 function for more information about the return value. */
2444 target_read_alloc (struct target_ops
*ops
, enum target_object object
,
2445 const char *annex
, gdb_byte
**buf_p
)
2447 return target_read_alloc_1 (ops
, object
, annex
, buf_p
, 0);
2450 /* Read OBJECT/ANNEX using OPS. The result is NUL-terminated and
2451 returned as a string, allocated using xmalloc. If an error occurs
2452 or the transfer is unsupported, NULL is returned. Empty objects
2453 are returned as allocated but empty strings. A warning is issued
2454 if the result contains any embedded NUL bytes. */
2457 target_read_stralloc (struct target_ops
*ops
, enum target_object object
,
2462 LONGEST i
, transferred
;
2464 transferred
= target_read_alloc_1 (ops
, object
, annex
, &buffer
, 1);
2465 bufstr
= (char *) buffer
;
2467 if (transferred
< 0)
2470 if (transferred
== 0)
2471 return xstrdup ("");
2473 bufstr
[transferred
] = 0;
2475 /* Check for embedded NUL bytes; but allow trailing NULs. */
2476 for (i
= strlen (bufstr
); i
< transferred
; i
++)
2479 warning (_("target object %d, annex %s, "
2480 "contained unexpected null characters"),
2481 (int) object
, annex
? annex
: "(none)");
2488 /* Memory transfer methods. */
2491 get_target_memory (struct target_ops
*ops
, CORE_ADDR addr
, gdb_byte
*buf
,
2494 /* This method is used to read from an alternate, non-current
2495 target. This read must bypass the overlay support (as symbols
2496 don't match this target), and GDB's internal cache (wrong cache
2497 for this target). */
2498 if (target_read (ops
, TARGET_OBJECT_RAW_MEMORY
, NULL
, buf
, addr
, len
)
2500 memory_error (TARGET_XFER_E_IO
, addr
);
2504 get_target_memory_unsigned (struct target_ops
*ops
, CORE_ADDR addr
,
2505 int len
, enum bfd_endian byte_order
)
2507 gdb_byte buf
[sizeof (ULONGEST
)];
2509 gdb_assert (len
<= sizeof (buf
));
2510 get_target_memory (ops
, addr
, buf
, len
);
2511 return extract_unsigned_integer (buf
, len
, byte_order
);
2517 target_insert_breakpoint (struct gdbarch
*gdbarch
,
2518 struct bp_target_info
*bp_tgt
)
2520 if (!may_insert_breakpoints
)
2522 warning (_("May not insert breakpoints"));
2526 return current_target
.to_insert_breakpoint (¤t_target
,
2533 target_remove_breakpoint (struct gdbarch
*gdbarch
,
2534 struct bp_target_info
*bp_tgt
)
2536 /* This is kind of a weird case to handle, but the permission might
2537 have been changed after breakpoints were inserted - in which case
2538 we should just take the user literally and assume that any
2539 breakpoints should be left in place. */
2540 if (!may_insert_breakpoints
)
2542 warning (_("May not remove breakpoints"));
2546 return current_target
.to_remove_breakpoint (¤t_target
,
2551 target_info (char *args
, int from_tty
)
2553 struct target_ops
*t
;
2554 int has_all_mem
= 0;
2556 if (symfile_objfile
!= NULL
)
2557 printf_unfiltered (_("Symbols from \"%s\".\n"),
2558 objfile_name (symfile_objfile
));
2560 for (t
= target_stack
; t
!= NULL
; t
= t
->beneath
)
2562 if (!(*t
->to_has_memory
) (t
))
2565 if ((int) (t
->to_stratum
) <= (int) dummy_stratum
)
2568 printf_unfiltered (_("\tWhile running this, "
2569 "GDB does not access memory from...\n"));
2570 printf_unfiltered ("%s:\n", t
->to_longname
);
2571 (t
->to_files_info
) (t
);
2572 has_all_mem
= (*t
->to_has_all_memory
) (t
);
2576 /* This function is called before any new inferior is created, e.g.
2577 by running a program, attaching, or connecting to a target.
2578 It cleans up any state from previous invocations which might
2579 change between runs. This is a subset of what target_preopen
2580 resets (things which might change between targets). */
2583 target_pre_inferior (int from_tty
)
2585 /* Clear out solib state. Otherwise the solib state of the previous
2586 inferior might have survived and is entirely wrong for the new
2587 target. This has been observed on GNU/Linux using glibc 2.3. How
2599 Cannot access memory at address 0xdeadbeef
2602 /* In some OSs, the shared library list is the same/global/shared
2603 across inferiors. If code is shared between processes, so are
2604 memory regions and features. */
2605 if (!gdbarch_has_global_solist (target_gdbarch ()))
2607 no_shared_libraries (NULL
, from_tty
);
2609 invalidate_target_mem_regions ();
2611 target_clear_description ();
2614 agent_capability_invalidate ();
2617 /* Callback for iterate_over_inferiors. Gets rid of the given
2621 dispose_inferior (struct inferior
*inf
, void *args
)
2623 struct thread_info
*thread
;
2625 thread
= any_thread_of_process (inf
->pid
);
2628 switch_to_thread (thread
->ptid
);
2630 /* Core inferiors actually should be detached, not killed. */
2631 if (target_has_execution
)
2634 target_detach (NULL
, 0);
2640 /* This is to be called by the open routine before it does
2644 target_preopen (int from_tty
)
2648 if (have_inferiors ())
2651 || !have_live_inferiors ()
2652 || query (_("A program is being debugged already. Kill it? ")))
2653 iterate_over_inferiors (dispose_inferior
, NULL
);
2655 error (_("Program not killed."));
2658 /* Calling target_kill may remove the target from the stack. But if
2659 it doesn't (which seems like a win for UDI), remove it now. */
2660 /* Leave the exec target, though. The user may be switching from a
2661 live process to a core of the same program. */
2662 pop_all_targets_above (file_stratum
);
2664 target_pre_inferior (from_tty
);
2667 /* Detach a target after doing deferred register stores. */
2670 target_detach (const char *args
, int from_tty
)
2672 struct target_ops
* t
;
2674 if (gdbarch_has_global_breakpoints (target_gdbarch ()))
2675 /* Don't remove global breakpoints here. They're removed on
2676 disconnection from the target. */
2679 /* If we're in breakpoints-always-inserted mode, have to remove
2680 them before detaching. */
2681 remove_breakpoints_pid (ptid_get_pid (inferior_ptid
));
2683 prepare_for_detach ();
2685 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2687 if (t
->to_detach
!= NULL
)
2689 t
->to_detach (t
, args
, from_tty
);
2691 fprintf_unfiltered (gdb_stdlog
, "target_detach (%s, %d)\n",
2697 internal_error (__FILE__
, __LINE__
, _("could not find a target to detach"));
2701 target_disconnect (char *args
, int from_tty
)
2703 struct target_ops
*t
;
2705 /* If we're in breakpoints-always-inserted mode or if breakpoints
2706 are global across processes, we have to remove them before
2708 remove_breakpoints ();
2710 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2711 if (t
->to_disconnect
!= NULL
)
2714 fprintf_unfiltered (gdb_stdlog
, "target_disconnect (%s, %d)\n",
2716 t
->to_disconnect (t
, args
, from_tty
);
2724 target_wait (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
2726 struct target_ops
*t
;
2727 ptid_t retval
= (current_target
.to_wait
) (¤t_target
, ptid
,
2732 char *status_string
;
2733 char *options_string
;
2735 status_string
= target_waitstatus_to_string (status
);
2736 options_string
= target_options_to_string (options
);
2737 fprintf_unfiltered (gdb_stdlog
,
2738 "target_wait (%d, status, options={%s})"
2740 ptid_get_pid (ptid
), options_string
,
2741 ptid_get_pid (retval
), status_string
);
2742 xfree (status_string
);
2743 xfree (options_string
);
2750 target_pid_to_str (ptid_t ptid
)
2752 struct target_ops
*t
;
2754 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2756 if (t
->to_pid_to_str
!= NULL
)
2757 return (*t
->to_pid_to_str
) (t
, ptid
);
2760 return normal_pid_to_str (ptid
);
2764 target_thread_name (struct thread_info
*info
)
2766 struct target_ops
*t
;
2768 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2770 if (t
->to_thread_name
!= NULL
)
2771 return (*t
->to_thread_name
) (info
);
2778 target_resume (ptid_t ptid
, int step
, enum gdb_signal signal
)
2780 struct target_ops
*t
;
2782 target_dcache_invalidate ();
2784 current_target
.to_resume (¤t_target
, ptid
, step
, signal
);
2786 fprintf_unfiltered (gdb_stdlog
, "target_resume (%d, %s, %s)\n",
2787 ptid_get_pid (ptid
),
2788 step
? "step" : "continue",
2789 gdb_signal_to_name (signal
));
2791 registers_changed_ptid (ptid
);
2792 set_executing (ptid
, 1);
2793 set_running (ptid
, 1);
2794 clear_inline_frame_state (ptid
);
2798 target_pass_signals (int numsigs
, unsigned char *pass_signals
)
2800 struct target_ops
*t
;
2802 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2804 if (t
->to_pass_signals
!= NULL
)
2810 fprintf_unfiltered (gdb_stdlog
, "target_pass_signals (%d, {",
2813 for (i
= 0; i
< numsigs
; i
++)
2814 if (pass_signals
[i
])
2815 fprintf_unfiltered (gdb_stdlog
, " %s",
2816 gdb_signal_to_name (i
));
2818 fprintf_unfiltered (gdb_stdlog
, " })\n");
2821 (*t
->to_pass_signals
) (numsigs
, pass_signals
);
2828 target_program_signals (int numsigs
, unsigned char *program_signals
)
2830 struct target_ops
*t
;
2832 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2834 if (t
->to_program_signals
!= NULL
)
2840 fprintf_unfiltered (gdb_stdlog
, "target_program_signals (%d, {",
2843 for (i
= 0; i
< numsigs
; i
++)
2844 if (program_signals
[i
])
2845 fprintf_unfiltered (gdb_stdlog
, " %s",
2846 gdb_signal_to_name (i
));
2848 fprintf_unfiltered (gdb_stdlog
, " })\n");
2851 (*t
->to_program_signals
) (numsigs
, program_signals
);
2857 /* Look through the list of possible targets for a target that can
2861 target_follow_fork (int follow_child
, int detach_fork
)
2863 struct target_ops
*t
;
2865 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2867 if (t
->to_follow_fork
!= NULL
)
2869 int retval
= t
->to_follow_fork (t
, follow_child
, detach_fork
);
2872 fprintf_unfiltered (gdb_stdlog
,
2873 "target_follow_fork (%d, %d) = %d\n",
2874 follow_child
, detach_fork
, retval
);
2879 /* Some target returned a fork event, but did not know how to follow it. */
2880 internal_error (__FILE__
, __LINE__
,
2881 _("could not find a target to follow fork"));
2885 target_mourn_inferior (void)
2887 struct target_ops
*t
;
2889 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2891 if (t
->to_mourn_inferior
!= NULL
)
2893 t
->to_mourn_inferior (t
);
2895 fprintf_unfiltered (gdb_stdlog
, "target_mourn_inferior ()\n");
2897 /* We no longer need to keep handles on any of the object files.
2898 Make sure to release them to avoid unnecessarily locking any
2899 of them while we're not actually debugging. */
2900 bfd_cache_close_all ();
2906 internal_error (__FILE__
, __LINE__
,
2907 _("could not find a target to follow mourn inferior"));
2910 /* Look for a target which can describe architectural features, starting
2911 from TARGET. If we find one, return its description. */
2913 const struct target_desc
*
2914 target_read_description (struct target_ops
*target
)
2916 struct target_ops
*t
;
2918 for (t
= target
; t
!= NULL
; t
= t
->beneath
)
2919 if (t
->to_read_description
!= NULL
)
2921 const struct target_desc
*tdesc
;
2923 tdesc
= t
->to_read_description (t
);
2931 /* The default implementation of to_search_memory.
2932 This implements a basic search of memory, reading target memory and
2933 performing the search here (as opposed to performing the search in on the
2934 target side with, for example, gdbserver). */
2937 simple_search_memory (struct target_ops
*ops
,
2938 CORE_ADDR start_addr
, ULONGEST search_space_len
,
2939 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2940 CORE_ADDR
*found_addrp
)
2942 /* NOTE: also defined in find.c testcase. */
2943 #define SEARCH_CHUNK_SIZE 16000
2944 const unsigned chunk_size
= SEARCH_CHUNK_SIZE
;
2945 /* Buffer to hold memory contents for searching. */
2946 gdb_byte
*search_buf
;
2947 unsigned search_buf_size
;
2948 struct cleanup
*old_cleanups
;
2950 search_buf_size
= chunk_size
+ pattern_len
- 1;
2952 /* No point in trying to allocate a buffer larger than the search space. */
2953 if (search_space_len
< search_buf_size
)
2954 search_buf_size
= search_space_len
;
2956 search_buf
= malloc (search_buf_size
);
2957 if (search_buf
== NULL
)
2958 error (_("Unable to allocate memory to perform the search."));
2959 old_cleanups
= make_cleanup (free_current_contents
, &search_buf
);
2961 /* Prime the search buffer. */
2963 if (target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2964 search_buf
, start_addr
, search_buf_size
) != search_buf_size
)
2966 warning (_("Unable to access %s bytes of target "
2967 "memory at %s, halting search."),
2968 pulongest (search_buf_size
), hex_string (start_addr
));
2969 do_cleanups (old_cleanups
);
2973 /* Perform the search.
2975 The loop is kept simple by allocating [N + pattern-length - 1] bytes.
2976 When we've scanned N bytes we copy the trailing bytes to the start and
2977 read in another N bytes. */
2979 while (search_space_len
>= pattern_len
)
2981 gdb_byte
*found_ptr
;
2982 unsigned nr_search_bytes
= min (search_space_len
, search_buf_size
);
2984 found_ptr
= memmem (search_buf
, nr_search_bytes
,
2985 pattern
, pattern_len
);
2987 if (found_ptr
!= NULL
)
2989 CORE_ADDR found_addr
= start_addr
+ (found_ptr
- search_buf
);
2991 *found_addrp
= found_addr
;
2992 do_cleanups (old_cleanups
);
2996 /* Not found in this chunk, skip to next chunk. */
2998 /* Don't let search_space_len wrap here, it's unsigned. */
2999 if (search_space_len
>= chunk_size
)
3000 search_space_len
-= chunk_size
;
3002 search_space_len
= 0;
3004 if (search_space_len
>= pattern_len
)
3006 unsigned keep_len
= search_buf_size
- chunk_size
;
3007 CORE_ADDR read_addr
= start_addr
+ chunk_size
+ keep_len
;
3010 /* Copy the trailing part of the previous iteration to the front
3011 of the buffer for the next iteration. */
3012 gdb_assert (keep_len
== pattern_len
- 1);
3013 memcpy (search_buf
, search_buf
+ chunk_size
, keep_len
);
3015 nr_to_read
= min (search_space_len
- keep_len
, chunk_size
);
3017 if (target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
3018 search_buf
+ keep_len
, read_addr
,
3019 nr_to_read
) != nr_to_read
)
3021 warning (_("Unable to access %s bytes of target "
3022 "memory at %s, halting search."),
3023 plongest (nr_to_read
),
3024 hex_string (read_addr
));
3025 do_cleanups (old_cleanups
);
3029 start_addr
+= chunk_size
;
3035 do_cleanups (old_cleanups
);
3039 /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the
3040 sequence of bytes in PATTERN with length PATTERN_LEN.
3042 The result is 1 if found, 0 if not found, and -1 if there was an error
3043 requiring halting of the search (e.g. memory read error).
3044 If the pattern is found the address is recorded in FOUND_ADDRP. */
3047 target_search_memory (CORE_ADDR start_addr
, ULONGEST search_space_len
,
3048 const gdb_byte
*pattern
, ULONGEST pattern_len
,
3049 CORE_ADDR
*found_addrp
)
3051 struct target_ops
*t
;
3054 /* We don't use INHERIT to set current_target.to_search_memory,
3055 so we have to scan the target stack and handle targetdebug
3059 fprintf_unfiltered (gdb_stdlog
, "target_search_memory (%s, ...)\n",
3060 hex_string (start_addr
));
3062 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3063 if (t
->to_search_memory
!= NULL
)
3068 found
= t
->to_search_memory (t
, start_addr
, search_space_len
,
3069 pattern
, pattern_len
, found_addrp
);
3073 /* If a special version of to_search_memory isn't available, use the
3075 found
= simple_search_memory (current_target
.beneath
,
3076 start_addr
, search_space_len
,
3077 pattern
, pattern_len
, found_addrp
);
3081 fprintf_unfiltered (gdb_stdlog
, " = %d\n", found
);
3086 /* Look through the currently pushed targets. If none of them will
3087 be able to restart the currently running process, issue an error
3091 target_require_runnable (void)
3093 struct target_ops
*t
;
3095 for (t
= target_stack
; t
!= NULL
; t
= t
->beneath
)
3097 /* If this target knows how to create a new program, then
3098 assume we will still be able to after killing the current
3099 one. Either killing and mourning will not pop T, or else
3100 find_default_run_target will find it again. */
3101 if (t
->to_create_inferior
!= NULL
)
3104 /* Do not worry about thread_stratum targets that can not
3105 create inferiors. Assume they will be pushed again if
3106 necessary, and continue to the process_stratum. */
3107 if (t
->to_stratum
== thread_stratum
3108 || t
->to_stratum
== arch_stratum
)
3111 error (_("The \"%s\" target does not support \"run\". "
3112 "Try \"help target\" or \"continue\"."),
3116 /* This function is only called if the target is running. In that
3117 case there should have been a process_stratum target and it
3118 should either know how to create inferiors, or not... */
3119 internal_error (__FILE__
, __LINE__
, _("No targets found"));
3122 /* Look through the list of possible targets for a target that can
3123 execute a run or attach command without any other data. This is
3124 used to locate the default process stratum.
3126 If DO_MESG is not NULL, the result is always valid (error() is
3127 called for errors); else, return NULL on error. */
3129 static struct target_ops
*
3130 find_default_run_target (char *do_mesg
)
3132 struct target_ops
**t
;
3133 struct target_ops
*runable
= NULL
;
3138 for (t
= target_structs
; t
< target_structs
+ target_struct_size
;
3141 if ((*t
)->to_can_run
&& target_can_run (*t
))
3151 error (_("Don't know how to %s. Try \"help target\"."), do_mesg
);
3160 find_default_attach (struct target_ops
*ops
, char *args
, int from_tty
)
3162 struct target_ops
*t
;
3164 t
= find_default_run_target ("attach");
3165 (t
->to_attach
) (t
, args
, from_tty
);
3170 find_default_create_inferior (struct target_ops
*ops
,
3171 char *exec_file
, char *allargs
, char **env
,
3174 struct target_ops
*t
;
3176 t
= find_default_run_target ("run");
3177 (t
->to_create_inferior
) (t
, exec_file
, allargs
, env
, from_tty
);
3182 find_default_can_async_p (struct target_ops
*ignore
)
3184 struct target_ops
*t
;
3186 /* This may be called before the target is pushed on the stack;
3187 look for the default process stratum. If there's none, gdb isn't
3188 configured with a native debugger, and target remote isn't
3190 t
= find_default_run_target (NULL
);
3191 if (t
&& t
->to_can_async_p
!= delegate_can_async_p
)
3192 return (t
->to_can_async_p
) (t
);
3197 find_default_is_async_p (struct target_ops
*ignore
)
3199 struct target_ops
*t
;
3201 /* This may be called before the target is pushed on the stack;
3202 look for the default process stratum. If there's none, gdb isn't
3203 configured with a native debugger, and target remote isn't
3205 t
= find_default_run_target (NULL
);
3206 if (t
&& t
->to_is_async_p
!= delegate_is_async_p
)
3207 return (t
->to_is_async_p
) (t
);
3212 find_default_supports_non_stop (void)
3214 struct target_ops
*t
;
3216 t
= find_default_run_target (NULL
);
3217 if (t
&& t
->to_supports_non_stop
)
3218 return (t
->to_supports_non_stop
) ();
3223 target_supports_non_stop (void)
3225 struct target_ops
*t
;
3227 for (t
= ¤t_target
; t
!= NULL
; t
= t
->beneath
)
3228 if (t
->to_supports_non_stop
)
3229 return t
->to_supports_non_stop ();
3234 /* Implement the "info proc" command. */
3237 target_info_proc (char *args
, enum info_proc_what what
)
3239 struct target_ops
*t
;
3241 /* If we're already connected to something that can get us OS
3242 related data, use it. Otherwise, try using the native
3244 if (current_target
.to_stratum
>= process_stratum
)
3245 t
= current_target
.beneath
;
3247 t
= find_default_run_target (NULL
);
3249 for (; t
!= NULL
; t
= t
->beneath
)
3251 if (t
->to_info_proc
!= NULL
)
3253 t
->to_info_proc (t
, args
, what
);
3256 fprintf_unfiltered (gdb_stdlog
,
3257 "target_info_proc (\"%s\", %d)\n", args
, what
);
3267 find_default_supports_disable_randomization (void)
3269 struct target_ops
*t
;
3271 t
= find_default_run_target (NULL
);
3272 if (t
&& t
->to_supports_disable_randomization
)
3273 return (t
->to_supports_disable_randomization
) ();
3278 target_supports_disable_randomization (void)
3280 struct target_ops
*t
;
3282 for (t
= ¤t_target
; t
!= NULL
; t
= t
->beneath
)
3283 if (t
->to_supports_disable_randomization
)
3284 return t
->to_supports_disable_randomization ();
3290 target_get_osdata (const char *type
)
3292 struct target_ops
*t
;
3294 /* If we're already connected to something that can get us OS
3295 related data, use it. Otherwise, try using the native
3297 if (current_target
.to_stratum
>= process_stratum
)
3298 t
= current_target
.beneath
;
3300 t
= find_default_run_target ("get OS data");
3305 return target_read_stralloc (t
, TARGET_OBJECT_OSDATA
, type
);
3308 /* Determine the current address space of thread PTID. */
3310 struct address_space
*
3311 target_thread_address_space (ptid_t ptid
)
3313 struct address_space
*aspace
;
3314 struct inferior
*inf
;
3315 struct target_ops
*t
;
3317 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3319 if (t
->to_thread_address_space
!= NULL
)
3321 aspace
= t
->to_thread_address_space (t
, ptid
);
3322 gdb_assert (aspace
);
3325 fprintf_unfiltered (gdb_stdlog
,
3326 "target_thread_address_space (%s) = %d\n",
3327 target_pid_to_str (ptid
),
3328 address_space_num (aspace
));
3333 /* Fall-back to the "main" address space of the inferior. */
3334 inf
= find_inferior_pid (ptid_get_pid (ptid
));
3336 if (inf
== NULL
|| inf
->aspace
== NULL
)
3337 internal_error (__FILE__
, __LINE__
,
3338 _("Can't determine the current "
3339 "address space of thread %s\n"),
3340 target_pid_to_str (ptid
));
3346 /* Target file operations. */
3348 static struct target_ops
*
3349 default_fileio_target (void)
3351 /* If we're already connected to something that can perform
3352 file I/O, use it. Otherwise, try using the native target. */
3353 if (current_target
.to_stratum
>= process_stratum
)
3354 return current_target
.beneath
;
3356 return find_default_run_target ("file I/O");
3359 /* Open FILENAME on the target, using FLAGS and MODE. Return a
3360 target file descriptor, or -1 if an error occurs (and set
3363 target_fileio_open (const char *filename
, int flags
, int mode
,
3366 struct target_ops
*t
;
3368 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
3370 if (t
->to_fileio_open
!= NULL
)
3372 int fd
= t
->to_fileio_open (filename
, flags
, mode
, target_errno
);
3375 fprintf_unfiltered (gdb_stdlog
,
3376 "target_fileio_open (%s,0x%x,0%o) = %d (%d)\n",
3377 filename
, flags
, mode
,
3378 fd
, fd
!= -1 ? 0 : *target_errno
);
3383 *target_errno
= FILEIO_ENOSYS
;
3387 /* Write up to LEN bytes from WRITE_BUF to FD on the target.
3388 Return the number of bytes written, or -1 if an error occurs
3389 (and set *TARGET_ERRNO). */
3391 target_fileio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
3392 ULONGEST offset
, int *target_errno
)
3394 struct target_ops
*t
;
3396 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
3398 if (t
->to_fileio_pwrite
!= NULL
)
3400 int ret
= t
->to_fileio_pwrite (fd
, write_buf
, len
, offset
,
3404 fprintf_unfiltered (gdb_stdlog
,
3405 "target_fileio_pwrite (%d,...,%d,%s) "
3407 fd
, len
, pulongest (offset
),
3408 ret
, ret
!= -1 ? 0 : *target_errno
);
3413 *target_errno
= FILEIO_ENOSYS
;
3417 /* Read up to LEN bytes FD on the target into READ_BUF.
3418 Return the number of bytes read, or -1 if an error occurs
3419 (and set *TARGET_ERRNO). */
3421 target_fileio_pread (int fd
, gdb_byte
*read_buf
, int len
,
3422 ULONGEST offset
, int *target_errno
)
3424 struct target_ops
*t
;
3426 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
3428 if (t
->to_fileio_pread
!= NULL
)
3430 int ret
= t
->to_fileio_pread (fd
, read_buf
, len
, offset
,
3434 fprintf_unfiltered (gdb_stdlog
,
3435 "target_fileio_pread (%d,...,%d,%s) "
3437 fd
, len
, pulongest (offset
),
3438 ret
, ret
!= -1 ? 0 : *target_errno
);
3443 *target_errno
= FILEIO_ENOSYS
;
3447 /* Close FD on the target. Return 0, or -1 if an error occurs
3448 (and set *TARGET_ERRNO). */
3450 target_fileio_close (int fd
, int *target_errno
)
3452 struct target_ops
*t
;
3454 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
3456 if (t
->to_fileio_close
!= NULL
)
3458 int ret
= t
->to_fileio_close (fd
, target_errno
);
3461 fprintf_unfiltered (gdb_stdlog
,
3462 "target_fileio_close (%d) = %d (%d)\n",
3463 fd
, ret
, ret
!= -1 ? 0 : *target_errno
);
3468 *target_errno
= FILEIO_ENOSYS
;
3472 /* Unlink FILENAME on the target. Return 0, or -1 if an error
3473 occurs (and set *TARGET_ERRNO). */
3475 target_fileio_unlink (const char *filename
, int *target_errno
)
3477 struct target_ops
*t
;
3479 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
3481 if (t
->to_fileio_unlink
!= NULL
)
3483 int ret
= t
->to_fileio_unlink (filename
, target_errno
);
3486 fprintf_unfiltered (gdb_stdlog
,
3487 "target_fileio_unlink (%s) = %d (%d)\n",
3488 filename
, ret
, ret
!= -1 ? 0 : *target_errno
);
3493 *target_errno
= FILEIO_ENOSYS
;
3497 /* Read value of symbolic link FILENAME on the target. Return a
3498 null-terminated string allocated via xmalloc, or NULL if an error
3499 occurs (and set *TARGET_ERRNO). */
3501 target_fileio_readlink (const char *filename
, int *target_errno
)
3503 struct target_ops
*t
;
3505 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
3507 if (t
->to_fileio_readlink
!= NULL
)
3509 char *ret
= t
->to_fileio_readlink (filename
, target_errno
);
3512 fprintf_unfiltered (gdb_stdlog
,
3513 "target_fileio_readlink (%s) = %s (%d)\n",
3514 filename
, ret
? ret
: "(nil)",
3515 ret
? 0 : *target_errno
);
3520 *target_errno
= FILEIO_ENOSYS
;
3525 target_fileio_close_cleanup (void *opaque
)
3527 int fd
= *(int *) opaque
;
3530 target_fileio_close (fd
, &target_errno
);
3533 /* Read target file FILENAME. Store the result in *BUF_P and
3534 return the size of the transferred data. PADDING additional bytes are
3535 available in *BUF_P. This is a helper function for
3536 target_fileio_read_alloc; see the declaration of that function for more
3540 target_fileio_read_alloc_1 (const char *filename
,
3541 gdb_byte
**buf_p
, int padding
)
3543 struct cleanup
*close_cleanup
;
3544 size_t buf_alloc
, buf_pos
;
3550 fd
= target_fileio_open (filename
, FILEIO_O_RDONLY
, 0700, &target_errno
);
3554 close_cleanup
= make_cleanup (target_fileio_close_cleanup
, &fd
);
3556 /* Start by reading up to 4K at a time. The target will throttle
3557 this number down if necessary. */
3559 buf
= xmalloc (buf_alloc
);
3563 n
= target_fileio_pread (fd
, &buf
[buf_pos
],
3564 buf_alloc
- buf_pos
- padding
, buf_pos
,
3568 /* An error occurred. */
3569 do_cleanups (close_cleanup
);
3575 /* Read all there was. */
3576 do_cleanups (close_cleanup
);
3586 /* If the buffer is filling up, expand it. */
3587 if (buf_alloc
< buf_pos
* 2)
3590 buf
= xrealloc (buf
, buf_alloc
);
3597 /* Read target file FILENAME. Store the result in *BUF_P and return
3598 the size of the transferred data. See the declaration in "target.h"
3599 function for more information about the return value. */
3602 target_fileio_read_alloc (const char *filename
, gdb_byte
**buf_p
)
3604 return target_fileio_read_alloc_1 (filename
, buf_p
, 0);
3607 /* Read target file FILENAME. The result is NUL-terminated and
3608 returned as a string, allocated using xmalloc. If an error occurs
3609 or the transfer is unsupported, NULL is returned. Empty objects
3610 are returned as allocated but empty strings. A warning is issued
3611 if the result contains any embedded NUL bytes. */
3614 target_fileio_read_stralloc (const char *filename
)
3618 LONGEST i
, transferred
;
3620 transferred
= target_fileio_read_alloc_1 (filename
, &buffer
, 1);
3621 bufstr
= (char *) buffer
;
3623 if (transferred
< 0)
3626 if (transferred
== 0)
3627 return xstrdup ("");
3629 bufstr
[transferred
] = 0;
3631 /* Check for embedded NUL bytes; but allow trailing NULs. */
3632 for (i
= strlen (bufstr
); i
< transferred
; i
++)
3635 warning (_("target file %s "
3636 "contained unexpected null characters"),
3646 default_region_ok_for_hw_watchpoint (struct target_ops
*self
,
3647 CORE_ADDR addr
, int len
)
3649 return (len
<= gdbarch_ptr_bit (target_gdbarch ()) / TARGET_CHAR_BIT
);
3653 default_watchpoint_addr_within_range (struct target_ops
*target
,
3655 CORE_ADDR start
, int length
)
3657 return addr
>= start
&& addr
< start
+ length
;
3660 static struct gdbarch
*
3661 default_thread_architecture (struct target_ops
*ops
, ptid_t ptid
)
3663 return target_gdbarch ();
3679 return_minus_one (void)
3691 * Find the next target down the stack from the specified target.
3695 find_target_beneath (struct target_ops
*t
)
3703 find_target_at (enum strata stratum
)
3705 struct target_ops
*t
;
3707 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3708 if (t
->to_stratum
== stratum
)
3715 /* The inferior process has died. Long live the inferior! */
3718 generic_mourn_inferior (void)
3722 ptid
= inferior_ptid
;
3723 inferior_ptid
= null_ptid
;
3725 /* Mark breakpoints uninserted in case something tries to delete a
3726 breakpoint while we delete the inferior's threads (which would
3727 fail, since the inferior is long gone). */
3728 mark_breakpoints_out ();
3730 if (!ptid_equal (ptid
, null_ptid
))
3732 int pid
= ptid_get_pid (ptid
);
3733 exit_inferior (pid
);
3736 /* Note this wipes step-resume breakpoints, so needs to be done
3737 after exit_inferior, which ends up referencing the step-resume
3738 breakpoints through clear_thread_inferior_resources. */
3739 breakpoint_init_inferior (inf_exited
);
3741 registers_changed ();
3743 reopen_exec_file ();
3744 reinit_frame_cache ();
3746 if (deprecated_detach_hook
)
3747 deprecated_detach_hook ();
3750 /* Convert a normal process ID to a string. Returns the string in a
3754 normal_pid_to_str (ptid_t ptid
)
3756 static char buf
[32];
3758 xsnprintf (buf
, sizeof buf
, "process %d", ptid_get_pid (ptid
));
3763 dummy_pid_to_str (struct target_ops
*ops
, ptid_t ptid
)
3765 return normal_pid_to_str (ptid
);
3768 /* Error-catcher for target_find_memory_regions. */
3770 dummy_find_memory_regions (find_memory_region_ftype ignore1
, void *ignore2
)
3772 error (_("Command not implemented for this target."));
3776 /* Error-catcher for target_make_corefile_notes. */
3778 dummy_make_corefile_notes (bfd
*ignore1
, int *ignore2
)
3780 error (_("Command not implemented for this target."));
3784 /* Error-catcher for target_get_bookmark. */
3786 dummy_get_bookmark (char *ignore1
, int ignore2
)
3792 /* Error-catcher for target_goto_bookmark. */
3794 dummy_goto_bookmark (gdb_byte
*ignore
, int from_tty
)
3799 /* Set up the handful of non-empty slots needed by the dummy target
3803 init_dummy_target (void)
3805 dummy_target
.to_shortname
= "None";
3806 dummy_target
.to_longname
= "None";
3807 dummy_target
.to_doc
= "";
3808 dummy_target
.to_attach
= find_default_attach
;
3809 dummy_target
.to_detach
=
3810 (void (*)(struct target_ops
*, const char *, int))target_ignore
;
3811 dummy_target
.to_create_inferior
= find_default_create_inferior
;
3812 dummy_target
.to_supports_non_stop
= find_default_supports_non_stop
;
3813 dummy_target
.to_supports_disable_randomization
3814 = find_default_supports_disable_randomization
;
3815 dummy_target
.to_pid_to_str
= dummy_pid_to_str
;
3816 dummy_target
.to_stratum
= dummy_stratum
;
3817 dummy_target
.to_find_memory_regions
= dummy_find_memory_regions
;
3818 dummy_target
.to_make_corefile_notes
= dummy_make_corefile_notes
;
3819 dummy_target
.to_get_bookmark
= dummy_get_bookmark
;
3820 dummy_target
.to_goto_bookmark
= dummy_goto_bookmark
;
3821 dummy_target
.to_has_all_memory
= (int (*) (struct target_ops
*)) return_zero
;
3822 dummy_target
.to_has_memory
= (int (*) (struct target_ops
*)) return_zero
;
3823 dummy_target
.to_has_stack
= (int (*) (struct target_ops
*)) return_zero
;
3824 dummy_target
.to_has_registers
= (int (*) (struct target_ops
*)) return_zero
;
3825 dummy_target
.to_has_execution
3826 = (int (*) (struct target_ops
*, ptid_t
)) return_zero
;
3827 dummy_target
.to_magic
= OPS_MAGIC
;
3829 install_dummy_methods (&dummy_target
);
3833 debug_to_open (char *args
, int from_tty
)
3835 debug_target
.to_open (args
, from_tty
);
3837 fprintf_unfiltered (gdb_stdlog
, "target_open (%s, %d)\n", args
, from_tty
);
3841 target_close (struct target_ops
*targ
)
3843 gdb_assert (!target_is_pushed (targ
));
3845 if (targ
->to_xclose
!= NULL
)
3846 targ
->to_xclose (targ
);
3847 else if (targ
->to_close
!= NULL
)
3848 targ
->to_close (targ
);
3851 fprintf_unfiltered (gdb_stdlog
, "target_close ()\n");
3855 target_attach (char *args
, int from_tty
)
3857 struct target_ops
*t
;
3859 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3861 if (t
->to_attach
!= NULL
)
3863 t
->to_attach (t
, args
, from_tty
);
3865 fprintf_unfiltered (gdb_stdlog
, "target_attach (%s, %d)\n",
3871 internal_error (__FILE__
, __LINE__
,
3872 _("could not find a target to attach"));
3876 target_thread_alive (ptid_t ptid
)
3878 struct target_ops
*t
;
3880 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3882 if (t
->to_thread_alive
!= NULL
)
3886 retval
= t
->to_thread_alive (t
, ptid
);
3888 fprintf_unfiltered (gdb_stdlog
, "target_thread_alive (%d) = %d\n",
3889 ptid_get_pid (ptid
), retval
);
3899 target_find_new_threads (void)
3901 struct target_ops
*t
;
3903 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3905 if (t
->to_find_new_threads
!= NULL
)
3907 t
->to_find_new_threads (t
);
3909 fprintf_unfiltered (gdb_stdlog
, "target_find_new_threads ()\n");
3917 target_stop (ptid_t ptid
)
3921 warning (_("May not interrupt or stop the target, ignoring attempt"));
3925 (*current_target
.to_stop
) (ptid
);
3929 debug_to_post_attach (struct target_ops
*self
, int pid
)
3931 debug_target
.to_post_attach (&debug_target
, pid
);
3933 fprintf_unfiltered (gdb_stdlog
, "target_post_attach (%d)\n", pid
);
3936 /* Concatenate ELEM to LIST, a comma separate list, and return the
3937 result. The LIST incoming argument is released. */
3940 str_comma_list_concat_elem (char *list
, const char *elem
)
3943 return xstrdup (elem
);
3945 return reconcat (list
, list
, ", ", elem
, (char *) NULL
);
3948 /* Helper for target_options_to_string. If OPT is present in
3949 TARGET_OPTIONS, append the OPT_STR (string version of OPT) in RET.
3950 Returns the new resulting string. OPT is removed from
3954 do_option (int *target_options
, char *ret
,
3955 int opt
, char *opt_str
)
3957 if ((*target_options
& opt
) != 0)
3959 ret
= str_comma_list_concat_elem (ret
, opt_str
);
3960 *target_options
&= ~opt
;
3967 target_options_to_string (int target_options
)
3971 #define DO_TARG_OPTION(OPT) \
3972 ret = do_option (&target_options, ret, OPT, #OPT)
3974 DO_TARG_OPTION (TARGET_WNOHANG
);
3976 if (target_options
!= 0)
3977 ret
= str_comma_list_concat_elem (ret
, "unknown???");
3985 debug_print_register (const char * func
,
3986 struct regcache
*regcache
, int regno
)
3988 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
3990 fprintf_unfiltered (gdb_stdlog
, "%s ", func
);
3991 if (regno
>= 0 && regno
< gdbarch_num_regs (gdbarch
)
3992 && gdbarch_register_name (gdbarch
, regno
) != NULL
3993 && gdbarch_register_name (gdbarch
, regno
)[0] != '\0')
3994 fprintf_unfiltered (gdb_stdlog
, "(%s)",
3995 gdbarch_register_name (gdbarch
, regno
));
3997 fprintf_unfiltered (gdb_stdlog
, "(%d)", regno
);
3998 if (regno
>= 0 && regno
< gdbarch_num_regs (gdbarch
))
4000 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
4001 int i
, size
= register_size (gdbarch
, regno
);
4002 gdb_byte buf
[MAX_REGISTER_SIZE
];
4004 regcache_raw_collect (regcache
, regno
, buf
);
4005 fprintf_unfiltered (gdb_stdlog
, " = ");
4006 for (i
= 0; i
< size
; i
++)
4008 fprintf_unfiltered (gdb_stdlog
, "%02x", buf
[i
]);
4010 if (size
<= sizeof (LONGEST
))
4012 ULONGEST val
= extract_unsigned_integer (buf
, size
, byte_order
);
4014 fprintf_unfiltered (gdb_stdlog
, " %s %s",
4015 core_addr_to_string_nz (val
), plongest (val
));
4018 fprintf_unfiltered (gdb_stdlog
, "\n");
4022 target_fetch_registers (struct regcache
*regcache
, int regno
)
4024 struct target_ops
*t
;
4026 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4028 if (t
->to_fetch_registers
!= NULL
)
4030 t
->to_fetch_registers (t
, regcache
, regno
);
4032 debug_print_register ("target_fetch_registers", regcache
, regno
);
4039 target_store_registers (struct regcache
*regcache
, int regno
)
4041 struct target_ops
*t
;
4043 if (!may_write_registers
)
4044 error (_("Writing to registers is not allowed (regno %d)"), regno
);
4046 current_target
.to_store_registers (¤t_target
, regcache
, regno
);
4049 debug_print_register ("target_store_registers", regcache
, regno
);
4054 target_core_of_thread (ptid_t ptid
)
4056 struct target_ops
*t
;
4058 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4060 if (t
->to_core_of_thread
!= NULL
)
4062 int retval
= t
->to_core_of_thread (t
, ptid
);
4065 fprintf_unfiltered (gdb_stdlog
,
4066 "target_core_of_thread (%d) = %d\n",
4067 ptid_get_pid (ptid
), retval
);
4076 target_verify_memory (const gdb_byte
*data
, CORE_ADDR memaddr
, ULONGEST size
)
4078 struct target_ops
*t
;
4080 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4082 if (t
->to_verify_memory
!= NULL
)
4084 int retval
= t
->to_verify_memory (t
, data
, memaddr
, size
);
4087 fprintf_unfiltered (gdb_stdlog
,
4088 "target_verify_memory (%s, %s) = %d\n",
4089 paddress (target_gdbarch (), memaddr
),
4099 /* The documentation for this function is in its prototype declaration in
4103 target_insert_mask_watchpoint (CORE_ADDR addr
, CORE_ADDR mask
, int rw
)
4105 struct target_ops
*t
;
4107 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4108 if (t
->to_insert_mask_watchpoint
!= NULL
)
4112 ret
= t
->to_insert_mask_watchpoint (t
, addr
, mask
, rw
);
4115 fprintf_unfiltered (gdb_stdlog
, "\
4116 target_insert_mask_watchpoint (%s, %s, %d) = %d\n",
4117 core_addr_to_string (addr
),
4118 core_addr_to_string (mask
), rw
, ret
);
4126 /* The documentation for this function is in its prototype declaration in
4130 target_remove_mask_watchpoint (CORE_ADDR addr
, CORE_ADDR mask
, int rw
)
4132 struct target_ops
*t
;
4134 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4135 if (t
->to_remove_mask_watchpoint
!= NULL
)
4139 ret
= t
->to_remove_mask_watchpoint (t
, addr
, mask
, rw
);
4142 fprintf_unfiltered (gdb_stdlog
, "\
4143 target_remove_mask_watchpoint (%s, %s, %d) = %d\n",
4144 core_addr_to_string (addr
),
4145 core_addr_to_string (mask
), rw
, ret
);
4153 /* The documentation for this function is in its prototype declaration
4157 target_masked_watch_num_registers (CORE_ADDR addr
, CORE_ADDR mask
)
4159 struct target_ops
*t
;
4161 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4162 if (t
->to_masked_watch_num_registers
!= NULL
)
4163 return t
->to_masked_watch_num_registers (t
, addr
, mask
);
4168 /* The documentation for this function is in its prototype declaration
4172 target_ranged_break_num_registers (void)
4174 struct target_ops
*t
;
4176 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4177 if (t
->to_ranged_break_num_registers
!= NULL
)
4178 return t
->to_ranged_break_num_registers (t
);
4185 struct btrace_target_info
*
4186 target_enable_btrace (ptid_t ptid
)
4188 struct target_ops
*t
;
4190 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4191 if (t
->to_enable_btrace
!= NULL
)
4192 return t
->to_enable_btrace (ptid
);
4201 target_disable_btrace (struct btrace_target_info
*btinfo
)
4203 struct target_ops
*t
;
4205 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4206 if (t
->to_disable_btrace
!= NULL
)
4208 t
->to_disable_btrace (btinfo
);
4218 target_teardown_btrace (struct btrace_target_info
*btinfo
)
4220 struct target_ops
*t
;
4222 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4223 if (t
->to_teardown_btrace
!= NULL
)
4225 t
->to_teardown_btrace (btinfo
);
4235 target_read_btrace (VEC (btrace_block_s
) **btrace
,
4236 struct btrace_target_info
*btinfo
,
4237 enum btrace_read_type type
)
4239 struct target_ops
*t
;
4241 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4242 if (t
->to_read_btrace
!= NULL
)
4243 return t
->to_read_btrace (btrace
, btinfo
, type
);
4246 return BTRACE_ERR_NOT_SUPPORTED
;
4252 target_stop_recording (void)
4254 struct target_ops
*t
;
4256 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4257 if (t
->to_stop_recording
!= NULL
)
4259 t
->to_stop_recording ();
4263 /* This is optional. */
4269 target_info_record (void)
4271 struct target_ops
*t
;
4273 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4274 if (t
->to_info_record
!= NULL
)
4276 t
->to_info_record ();
4286 target_save_record (const char *filename
)
4288 struct target_ops
*t
;
4290 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4291 if (t
->to_save_record
!= NULL
)
4293 t
->to_save_record (filename
);
4303 target_supports_delete_record (void)
4305 struct target_ops
*t
;
4307 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4308 if (t
->to_delete_record
!= NULL
)
4317 target_delete_record (void)
4319 struct target_ops
*t
;
4321 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4322 if (t
->to_delete_record
!= NULL
)
4324 t
->to_delete_record ();
4334 target_record_is_replaying (void)
4336 struct target_ops
*t
;
4338 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4339 if (t
->to_record_is_replaying
!= NULL
)
4340 return t
->to_record_is_replaying ();
4348 target_goto_record_begin (void)
4350 struct target_ops
*t
;
4352 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4353 if (t
->to_goto_record_begin
!= NULL
)
4355 t
->to_goto_record_begin ();
4365 target_goto_record_end (void)
4367 struct target_ops
*t
;
4369 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4370 if (t
->to_goto_record_end
!= NULL
)
4372 t
->to_goto_record_end ();
4382 target_goto_record (ULONGEST insn
)
4384 struct target_ops
*t
;
4386 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4387 if (t
->to_goto_record
!= NULL
)
4389 t
->to_goto_record (insn
);
4399 target_insn_history (int size
, int flags
)
4401 struct target_ops
*t
;
4403 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4404 if (t
->to_insn_history
!= NULL
)
4406 t
->to_insn_history (size
, flags
);
4416 target_insn_history_from (ULONGEST from
, int size
, int flags
)
4418 struct target_ops
*t
;
4420 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4421 if (t
->to_insn_history_from
!= NULL
)
4423 t
->to_insn_history_from (from
, size
, flags
);
4433 target_insn_history_range (ULONGEST begin
, ULONGEST end
, int flags
)
4435 struct target_ops
*t
;
4437 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4438 if (t
->to_insn_history_range
!= NULL
)
4440 t
->to_insn_history_range (begin
, end
, flags
);
4450 target_call_history (int size
, int flags
)
4452 struct target_ops
*t
;
4454 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4455 if (t
->to_call_history
!= NULL
)
4457 t
->to_call_history (size
, flags
);
4467 target_call_history_from (ULONGEST begin
, int size
, int flags
)
4469 struct target_ops
*t
;
4471 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4472 if (t
->to_call_history_from
!= NULL
)
4474 t
->to_call_history_from (begin
, size
, flags
);
4484 target_call_history_range (ULONGEST begin
, ULONGEST end
, int flags
)
4486 struct target_ops
*t
;
4488 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4489 if (t
->to_call_history_range
!= NULL
)
4491 t
->to_call_history_range (begin
, end
, flags
);
4499 debug_to_prepare_to_store (struct target_ops
*self
, struct regcache
*regcache
)
4501 debug_target
.to_prepare_to_store (&debug_target
, regcache
);
4503 fprintf_unfiltered (gdb_stdlog
, "target_prepare_to_store ()\n");
4508 const struct frame_unwind
*
4509 target_get_unwinder (void)
4511 struct target_ops
*t
;
4513 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4514 if (t
->to_get_unwinder
!= NULL
)
4515 return t
->to_get_unwinder
;
4522 const struct frame_unwind
*
4523 target_get_tailcall_unwinder (void)
4525 struct target_ops
*t
;
4527 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4528 if (t
->to_get_tailcall_unwinder
!= NULL
)
4529 return t
->to_get_tailcall_unwinder
;
4537 forward_target_decr_pc_after_break (struct target_ops
*ops
,
4538 struct gdbarch
*gdbarch
)
4540 for (; ops
!= NULL
; ops
= ops
->beneath
)
4541 if (ops
->to_decr_pc_after_break
!= NULL
)
4542 return ops
->to_decr_pc_after_break (ops
, gdbarch
);
4544 return gdbarch_decr_pc_after_break (gdbarch
);
4550 target_decr_pc_after_break (struct gdbarch
*gdbarch
)
4552 return forward_target_decr_pc_after_break (current_target
.beneath
, gdbarch
);
4556 deprecated_debug_xfer_memory (CORE_ADDR memaddr
, bfd_byte
*myaddr
, int len
,
4557 int write
, struct mem_attrib
*attrib
,
4558 struct target_ops
*target
)
4562 retval
= debug_target
.deprecated_xfer_memory (memaddr
, myaddr
, len
, write
,
4565 fprintf_unfiltered (gdb_stdlog
,
4566 "target_xfer_memory (%s, xxx, %d, %s, xxx) = %d",
4567 paddress (target_gdbarch (), memaddr
), len
,
4568 write
? "write" : "read", retval
);
4574 fputs_unfiltered (", bytes =", gdb_stdlog
);
4575 for (i
= 0; i
< retval
; i
++)
4577 if ((((intptr_t) &(myaddr
[i
])) & 0xf) == 0)
4579 if (targetdebug
< 2 && i
> 0)
4581 fprintf_unfiltered (gdb_stdlog
, " ...");
4584 fprintf_unfiltered (gdb_stdlog
, "\n");
4587 fprintf_unfiltered (gdb_stdlog
, " %02x", myaddr
[i
] & 0xff);
4591 fputc_unfiltered ('\n', gdb_stdlog
);
4597 debug_to_files_info (struct target_ops
*target
)
4599 debug_target
.to_files_info (target
);
4601 fprintf_unfiltered (gdb_stdlog
, "target_files_info (xxx)\n");
4605 debug_to_insert_breakpoint (struct target_ops
*ops
, struct gdbarch
*gdbarch
,
4606 struct bp_target_info
*bp_tgt
)
4610 retval
= debug_target
.to_insert_breakpoint (&debug_target
, gdbarch
, bp_tgt
);
4612 fprintf_unfiltered (gdb_stdlog
,
4613 "target_insert_breakpoint (%s, xxx) = %ld\n",
4614 core_addr_to_string (bp_tgt
->placed_address
),
4615 (unsigned long) retval
);
4620 debug_to_remove_breakpoint (struct target_ops
*ops
, struct gdbarch
*gdbarch
,
4621 struct bp_target_info
*bp_tgt
)
4625 retval
= debug_target
.to_remove_breakpoint (&debug_target
, gdbarch
, bp_tgt
);
4627 fprintf_unfiltered (gdb_stdlog
,
4628 "target_remove_breakpoint (%s, xxx) = %ld\n",
4629 core_addr_to_string (bp_tgt
->placed_address
),
4630 (unsigned long) retval
);
4635 debug_to_can_use_hw_breakpoint (struct target_ops
*self
,
4636 int type
, int cnt
, int from_tty
)
4640 retval
= debug_target
.to_can_use_hw_breakpoint (&debug_target
,
4641 type
, cnt
, from_tty
);
4643 fprintf_unfiltered (gdb_stdlog
,
4644 "target_can_use_hw_breakpoint (%ld, %ld, %ld) = %ld\n",
4645 (unsigned long) type
,
4646 (unsigned long) cnt
,
4647 (unsigned long) from_tty
,
4648 (unsigned long) retval
);
4653 debug_to_region_ok_for_hw_watchpoint (struct target_ops
*self
,
4654 CORE_ADDR addr
, int len
)
4658 retval
= debug_target
.to_region_ok_for_hw_watchpoint (&debug_target
,
4661 fprintf_unfiltered (gdb_stdlog
,
4662 "target_region_ok_for_hw_watchpoint (%s, %ld) = %s\n",
4663 core_addr_to_string (addr
), (unsigned long) len
,
4664 core_addr_to_string (retval
));
4669 debug_to_can_accel_watchpoint_condition (CORE_ADDR addr
, int len
, int rw
,
4670 struct expression
*cond
)
4674 retval
= debug_target
.to_can_accel_watchpoint_condition (addr
, len
,
4677 fprintf_unfiltered (gdb_stdlog
,
4678 "target_can_accel_watchpoint_condition "
4679 "(%s, %d, %d, %s) = %ld\n",
4680 core_addr_to_string (addr
), len
, rw
,
4681 host_address_to_string (cond
), (unsigned long) retval
);
4686 debug_to_stopped_by_watchpoint (struct target_ops
*ops
)
4690 retval
= debug_target
.to_stopped_by_watchpoint (&debug_target
);
4692 fprintf_unfiltered (gdb_stdlog
,
4693 "target_stopped_by_watchpoint () = %ld\n",
4694 (unsigned long) retval
);
4699 debug_to_stopped_data_address (struct target_ops
*target
, CORE_ADDR
*addr
)
4703 retval
= debug_target
.to_stopped_data_address (target
, addr
);
4705 fprintf_unfiltered (gdb_stdlog
,
4706 "target_stopped_data_address ([%s]) = %ld\n",
4707 core_addr_to_string (*addr
),
4708 (unsigned long)retval
);
4713 debug_to_watchpoint_addr_within_range (struct target_ops
*target
,
4715 CORE_ADDR start
, int length
)
4719 retval
= debug_target
.to_watchpoint_addr_within_range (target
, addr
,
4722 fprintf_filtered (gdb_stdlog
,
4723 "target_watchpoint_addr_within_range (%s, %s, %d) = %d\n",
4724 core_addr_to_string (addr
), core_addr_to_string (start
),
4730 debug_to_insert_hw_breakpoint (struct target_ops
*self
,
4731 struct gdbarch
*gdbarch
,
4732 struct bp_target_info
*bp_tgt
)
4736 retval
= debug_target
.to_insert_hw_breakpoint (&debug_target
,
4739 fprintf_unfiltered (gdb_stdlog
,
4740 "target_insert_hw_breakpoint (%s, xxx) = %ld\n",
4741 core_addr_to_string (bp_tgt
->placed_address
),
4742 (unsigned long) retval
);
4747 debug_to_remove_hw_breakpoint (struct target_ops
*self
,
4748 struct gdbarch
*gdbarch
,
4749 struct bp_target_info
*bp_tgt
)
4753 retval
= debug_target
.to_remove_hw_breakpoint (&debug_target
,
4756 fprintf_unfiltered (gdb_stdlog
,
4757 "target_remove_hw_breakpoint (%s, xxx) = %ld\n",
4758 core_addr_to_string (bp_tgt
->placed_address
),
4759 (unsigned long) retval
);
4764 debug_to_insert_watchpoint (struct target_ops
*self
,
4765 CORE_ADDR addr
, int len
, int type
,
4766 struct expression
*cond
)
4770 retval
= debug_target
.to_insert_watchpoint (&debug_target
,
4771 addr
, len
, type
, cond
);
4773 fprintf_unfiltered (gdb_stdlog
,
4774 "target_insert_watchpoint (%s, %d, %d, %s) = %ld\n",
4775 core_addr_to_string (addr
), len
, type
,
4776 host_address_to_string (cond
), (unsigned long) retval
);
4781 debug_to_remove_watchpoint (struct target_ops
*self
,
4782 CORE_ADDR addr
, int len
, int type
,
4783 struct expression
*cond
)
4787 retval
= debug_target
.to_remove_watchpoint (&debug_target
,
4788 addr
, len
, type
, cond
);
4790 fprintf_unfiltered (gdb_stdlog
,
4791 "target_remove_watchpoint (%s, %d, %d, %s) = %ld\n",
4792 core_addr_to_string (addr
), len
, type
,
4793 host_address_to_string (cond
), (unsigned long) retval
);
4798 debug_to_terminal_init (void)
4800 debug_target
.to_terminal_init ();
4802 fprintf_unfiltered (gdb_stdlog
, "target_terminal_init ()\n");
4806 debug_to_terminal_inferior (void)
4808 debug_target
.to_terminal_inferior ();
4810 fprintf_unfiltered (gdb_stdlog
, "target_terminal_inferior ()\n");
4814 debug_to_terminal_ours_for_output (void)
4816 debug_target
.to_terminal_ours_for_output ();
4818 fprintf_unfiltered (gdb_stdlog
, "target_terminal_ours_for_output ()\n");
4822 debug_to_terminal_ours (void)
4824 debug_target
.to_terminal_ours ();
4826 fprintf_unfiltered (gdb_stdlog
, "target_terminal_ours ()\n");
4830 debug_to_terminal_save_ours (void)
4832 debug_target
.to_terminal_save_ours ();
4834 fprintf_unfiltered (gdb_stdlog
, "target_terminal_save_ours ()\n");
4838 debug_to_terminal_info (const char *arg
, int from_tty
)
4840 debug_target
.to_terminal_info (arg
, from_tty
);
4842 fprintf_unfiltered (gdb_stdlog
, "target_terminal_info (%s, %d)\n", arg
,
4847 debug_to_load (char *args
, int from_tty
)
4849 debug_target
.to_load (args
, from_tty
);
4851 fprintf_unfiltered (gdb_stdlog
, "target_load (%s, %d)\n", args
, from_tty
);
4855 debug_to_post_startup_inferior (ptid_t ptid
)
4857 debug_target
.to_post_startup_inferior (ptid
);
4859 fprintf_unfiltered (gdb_stdlog
, "target_post_startup_inferior (%d)\n",
4860 ptid_get_pid (ptid
));
4864 debug_to_insert_fork_catchpoint (int pid
)
4868 retval
= debug_target
.to_insert_fork_catchpoint (pid
);
4870 fprintf_unfiltered (gdb_stdlog
, "target_insert_fork_catchpoint (%d) = %d\n",
4877 debug_to_remove_fork_catchpoint (int pid
)
4881 retval
= debug_target
.to_remove_fork_catchpoint (pid
);
4883 fprintf_unfiltered (gdb_stdlog
, "target_remove_fork_catchpoint (%d) = %d\n",
4890 debug_to_insert_vfork_catchpoint (int pid
)
4894 retval
= debug_target
.to_insert_vfork_catchpoint (pid
);
4896 fprintf_unfiltered (gdb_stdlog
, "target_insert_vfork_catchpoint (%d) = %d\n",
4903 debug_to_remove_vfork_catchpoint (int pid
)
4907 retval
= debug_target
.to_remove_vfork_catchpoint (pid
);
4909 fprintf_unfiltered (gdb_stdlog
, "target_remove_vfork_catchpoint (%d) = %d\n",
4916 debug_to_insert_exec_catchpoint (int pid
)
4920 retval
= debug_target
.to_insert_exec_catchpoint (pid
);
4922 fprintf_unfiltered (gdb_stdlog
, "target_insert_exec_catchpoint (%d) = %d\n",
4929 debug_to_remove_exec_catchpoint (int pid
)
4933 retval
= debug_target
.to_remove_exec_catchpoint (pid
);
4935 fprintf_unfiltered (gdb_stdlog
, "target_remove_exec_catchpoint (%d) = %d\n",
4942 debug_to_has_exited (int pid
, int wait_status
, int *exit_status
)
4946 has_exited
= debug_target
.to_has_exited (pid
, wait_status
, exit_status
);
4948 fprintf_unfiltered (gdb_stdlog
, "target_has_exited (%d, %d, %d) = %d\n",
4949 pid
, wait_status
, *exit_status
, has_exited
);
4955 debug_to_can_run (void)
4959 retval
= debug_target
.to_can_run ();
4961 fprintf_unfiltered (gdb_stdlog
, "target_can_run () = %d\n", retval
);
4966 static struct gdbarch
*
4967 debug_to_thread_architecture (struct target_ops
*ops
, ptid_t ptid
)
4969 struct gdbarch
*retval
;
4971 retval
= debug_target
.to_thread_architecture (ops
, ptid
);
4973 fprintf_unfiltered (gdb_stdlog
,
4974 "target_thread_architecture (%s) = %s [%s]\n",
4975 target_pid_to_str (ptid
),
4976 host_address_to_string (retval
),
4977 gdbarch_bfd_arch_info (retval
)->printable_name
);
4982 debug_to_stop (ptid_t ptid
)
4984 debug_target
.to_stop (ptid
);
4986 fprintf_unfiltered (gdb_stdlog
, "target_stop (%s)\n",
4987 target_pid_to_str (ptid
));
4991 debug_to_rcmd (char *command
,
4992 struct ui_file
*outbuf
)
4994 debug_target
.to_rcmd (command
, outbuf
);
4995 fprintf_unfiltered (gdb_stdlog
, "target_rcmd (%s, ...)\n", command
);
4999 debug_to_pid_to_exec_file (int pid
)
5003 exec_file
= debug_target
.to_pid_to_exec_file (pid
);
5005 fprintf_unfiltered (gdb_stdlog
, "target_pid_to_exec_file (%d) = %s\n",
5012 setup_target_debug (void)
5014 memcpy (&debug_target
, ¤t_target
, sizeof debug_target
);
5016 current_target
.to_open
= debug_to_open
;
5017 current_target
.to_post_attach
= debug_to_post_attach
;
5018 current_target
.to_prepare_to_store
= debug_to_prepare_to_store
;
5019 current_target
.deprecated_xfer_memory
= deprecated_debug_xfer_memory
;
5020 current_target
.to_files_info
= debug_to_files_info
;
5021 current_target
.to_insert_breakpoint
= debug_to_insert_breakpoint
;
5022 current_target
.to_remove_breakpoint
= debug_to_remove_breakpoint
;
5023 current_target
.to_can_use_hw_breakpoint
= debug_to_can_use_hw_breakpoint
;
5024 current_target
.to_insert_hw_breakpoint
= debug_to_insert_hw_breakpoint
;
5025 current_target
.to_remove_hw_breakpoint
= debug_to_remove_hw_breakpoint
;
5026 current_target
.to_insert_watchpoint
= debug_to_insert_watchpoint
;
5027 current_target
.to_remove_watchpoint
= debug_to_remove_watchpoint
;
5028 current_target
.to_stopped_by_watchpoint
= debug_to_stopped_by_watchpoint
;
5029 current_target
.to_stopped_data_address
= debug_to_stopped_data_address
;
5030 current_target
.to_watchpoint_addr_within_range
5031 = debug_to_watchpoint_addr_within_range
;
5032 current_target
.to_region_ok_for_hw_watchpoint
5033 = debug_to_region_ok_for_hw_watchpoint
;
5034 current_target
.to_can_accel_watchpoint_condition
5035 = debug_to_can_accel_watchpoint_condition
;
5036 current_target
.to_terminal_init
= debug_to_terminal_init
;
5037 current_target
.to_terminal_inferior
= debug_to_terminal_inferior
;
5038 current_target
.to_terminal_ours_for_output
5039 = debug_to_terminal_ours_for_output
;
5040 current_target
.to_terminal_ours
= debug_to_terminal_ours
;
5041 current_target
.to_terminal_save_ours
= debug_to_terminal_save_ours
;
5042 current_target
.to_terminal_info
= debug_to_terminal_info
;
5043 current_target
.to_load
= debug_to_load
;
5044 current_target
.to_post_startup_inferior
= debug_to_post_startup_inferior
;
5045 current_target
.to_insert_fork_catchpoint
= debug_to_insert_fork_catchpoint
;
5046 current_target
.to_remove_fork_catchpoint
= debug_to_remove_fork_catchpoint
;
5047 current_target
.to_insert_vfork_catchpoint
= debug_to_insert_vfork_catchpoint
;
5048 current_target
.to_remove_vfork_catchpoint
= debug_to_remove_vfork_catchpoint
;
5049 current_target
.to_insert_exec_catchpoint
= debug_to_insert_exec_catchpoint
;
5050 current_target
.to_remove_exec_catchpoint
= debug_to_remove_exec_catchpoint
;
5051 current_target
.to_has_exited
= debug_to_has_exited
;
5052 current_target
.to_can_run
= debug_to_can_run
;
5053 current_target
.to_stop
= debug_to_stop
;
5054 current_target
.to_rcmd
= debug_to_rcmd
;
5055 current_target
.to_pid_to_exec_file
= debug_to_pid_to_exec_file
;
5056 current_target
.to_thread_architecture
= debug_to_thread_architecture
;
5060 static char targ_desc
[] =
5061 "Names of targets and files being debugged.\nShows the entire \
5062 stack of targets currently in use (including the exec-file,\n\
5063 core-file, and process, if any), as well as the symbol file name.";
5066 do_monitor_command (char *cmd
,
5069 if ((current_target
.to_rcmd
5070 == (void (*) (char *, struct ui_file
*)) tcomplain
)
5071 || (current_target
.to_rcmd
== debug_to_rcmd
5072 && (debug_target
.to_rcmd
5073 == (void (*) (char *, struct ui_file
*)) tcomplain
)))
5074 error (_("\"monitor\" command not supported by this target."));
5075 target_rcmd (cmd
, gdb_stdtarg
);
5078 /* Print the name of each layers of our target stack. */
5081 maintenance_print_target_stack (char *cmd
, int from_tty
)
5083 struct target_ops
*t
;
5085 printf_filtered (_("The current target stack is:\n"));
5087 for (t
= target_stack
; t
!= NULL
; t
= t
->beneath
)
5089 printf_filtered (" - %s (%s)\n", t
->to_shortname
, t
->to_longname
);
5093 /* Controls if async mode is permitted. */
5094 int target_async_permitted
= 0;
5096 /* The set command writes to this variable. If the inferior is
5097 executing, target_async_permitted is *not* updated. */
5098 static int target_async_permitted_1
= 0;
5101 set_target_async_command (char *args
, int from_tty
,
5102 struct cmd_list_element
*c
)
5104 if (have_live_inferiors ())
5106 target_async_permitted_1
= target_async_permitted
;
5107 error (_("Cannot change this setting while the inferior is running."));
5110 target_async_permitted
= target_async_permitted_1
;
5114 show_target_async_command (struct ui_file
*file
, int from_tty
,
5115 struct cmd_list_element
*c
,
5118 fprintf_filtered (file
,
5119 _("Controlling the inferior in "
5120 "asynchronous mode is %s.\n"), value
);
5123 /* Temporary copies of permission settings. */
5125 static int may_write_registers_1
= 1;
5126 static int may_write_memory_1
= 1;
5127 static int may_insert_breakpoints_1
= 1;
5128 static int may_insert_tracepoints_1
= 1;
5129 static int may_insert_fast_tracepoints_1
= 1;
5130 static int may_stop_1
= 1;
5132 /* Make the user-set values match the real values again. */
5135 update_target_permissions (void)
5137 may_write_registers_1
= may_write_registers
;
5138 may_write_memory_1
= may_write_memory
;
5139 may_insert_breakpoints_1
= may_insert_breakpoints
;
5140 may_insert_tracepoints_1
= may_insert_tracepoints
;
5141 may_insert_fast_tracepoints_1
= may_insert_fast_tracepoints
;
5142 may_stop_1
= may_stop
;
5145 /* The one function handles (most of) the permission flags in the same
5149 set_target_permissions (char *args
, int from_tty
,
5150 struct cmd_list_element
*c
)
5152 if (target_has_execution
)
5154 update_target_permissions ();
5155 error (_("Cannot change this setting while the inferior is running."));
5158 /* Make the real values match the user-changed values. */
5159 may_write_registers
= may_write_registers_1
;
5160 may_insert_breakpoints
= may_insert_breakpoints_1
;
5161 may_insert_tracepoints
= may_insert_tracepoints_1
;
5162 may_insert_fast_tracepoints
= may_insert_fast_tracepoints_1
;
5163 may_stop
= may_stop_1
;
5164 update_observer_mode ();
5167 /* Set memory write permission independently of observer mode. */
5170 set_write_memory_permission (char *args
, int from_tty
,
5171 struct cmd_list_element
*c
)
5173 /* Make the real values match the user-changed values. */
5174 may_write_memory
= may_write_memory_1
;
5175 update_observer_mode ();
5180 initialize_targets (void)
5182 init_dummy_target ();
5183 push_target (&dummy_target
);
5185 add_info ("target", target_info
, targ_desc
);
5186 add_info ("files", target_info
, targ_desc
);
5188 add_setshow_zuinteger_cmd ("target", class_maintenance
, &targetdebug
, _("\
5189 Set target debugging."), _("\
5190 Show target debugging."), _("\
5191 When non-zero, target debugging is enabled. Higher numbers are more\n\
5192 verbose. Changes do not take effect until the next \"run\" or \"target\"\n\
5196 &setdebuglist
, &showdebuglist
);
5198 add_setshow_boolean_cmd ("trust-readonly-sections", class_support
,
5199 &trust_readonly
, _("\
5200 Set mode for reading from readonly sections."), _("\
5201 Show mode for reading from readonly sections."), _("\
5202 When this mode is on, memory reads from readonly sections (such as .text)\n\
5203 will be read from the object file instead of from the target. This will\n\
5204 result in significant performance improvement for remote targets."),
5206 show_trust_readonly
,
5207 &setlist
, &showlist
);
5209 add_com ("monitor", class_obscure
, do_monitor_command
,
5210 _("Send a command to the remote monitor (remote targets only)."));
5212 add_cmd ("target-stack", class_maintenance
, maintenance_print_target_stack
,
5213 _("Print the name of each layer of the internal target stack."),
5214 &maintenanceprintlist
);
5216 add_setshow_boolean_cmd ("target-async", no_class
,
5217 &target_async_permitted_1
, _("\
5218 Set whether gdb controls the inferior in asynchronous mode."), _("\
5219 Show whether gdb controls the inferior in asynchronous mode."), _("\
5220 Tells gdb whether to control the inferior in asynchronous mode."),
5221 set_target_async_command
,
5222 show_target_async_command
,
5226 add_setshow_boolean_cmd ("may-write-registers", class_support
,
5227 &may_write_registers_1
, _("\
5228 Set permission to write into registers."), _("\
5229 Show permission to write into registers."), _("\
5230 When this permission is on, GDB may write into the target's registers.\n\
5231 Otherwise, any sort of write attempt will result in an error."),
5232 set_target_permissions
, NULL
,
5233 &setlist
, &showlist
);
5235 add_setshow_boolean_cmd ("may-write-memory", class_support
,
5236 &may_write_memory_1
, _("\
5237 Set permission to write into target memory."), _("\
5238 Show permission to write into target memory."), _("\
5239 When this permission is on, GDB may write into the target's memory.\n\
5240 Otherwise, any sort of write attempt will result in an error."),
5241 set_write_memory_permission
, NULL
,
5242 &setlist
, &showlist
);
5244 add_setshow_boolean_cmd ("may-insert-breakpoints", class_support
,
5245 &may_insert_breakpoints_1
, _("\
5246 Set permission to insert breakpoints in the target."), _("\
5247 Show permission to insert breakpoints in the target."), _("\
5248 When this permission is on, GDB may insert breakpoints in the program.\n\
5249 Otherwise, any sort of insertion attempt will result in an error."),
5250 set_target_permissions
, NULL
,
5251 &setlist
, &showlist
);
5253 add_setshow_boolean_cmd ("may-insert-tracepoints", class_support
,
5254 &may_insert_tracepoints_1
, _("\
5255 Set permission to insert tracepoints in the target."), _("\
5256 Show permission to insert tracepoints in the target."), _("\
5257 When this permission is on, GDB may insert tracepoints in the program.\n\
5258 Otherwise, any sort of insertion attempt will result in an error."),
5259 set_target_permissions
, NULL
,
5260 &setlist
, &showlist
);
5262 add_setshow_boolean_cmd ("may-insert-fast-tracepoints", class_support
,
5263 &may_insert_fast_tracepoints_1
, _("\
5264 Set permission to insert fast tracepoints in the target."), _("\
5265 Show permission to insert fast tracepoints in the target."), _("\
5266 When this permission is on, GDB may insert fast tracepoints.\n\
5267 Otherwise, any sort of insertion attempt will result in an error."),
5268 set_target_permissions
, NULL
,
5269 &setlist
, &showlist
);
5271 add_setshow_boolean_cmd ("may-interrupt", class_support
,
5273 Set permission to interrupt or signal the target."), _("\
5274 Show permission to interrupt or signal the target."), _("\
5275 When this permission is on, GDB may interrupt/stop the target's execution.\n\
5276 Otherwise, any attempt to interrupt or stop will be ignored."),
5277 set_target_permissions
, NULL
,
5278 &setlist
, &showlist
);