1 /* Select target systems and architectures at runtime for GDB.
3 Copyright (C) 1990-2014 Free Software Foundation, Inc.
5 Contributed by Cygnus Support.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
26 #include "target-dcache.h"
36 #include "gdb_assert.h"
38 #include "exceptions.h"
39 #include "target-descriptions.h"
40 #include "gdbthread.h"
43 #include "inline-frame.h"
44 #include "tracepoint.h"
45 #include "gdb/fileio.h"
48 static void target_info (char *, int);
50 static void default_terminal_info (struct target_ops
*, const char *, int);
52 static int default_watchpoint_addr_within_range (struct target_ops
*,
53 CORE_ADDR
, CORE_ADDR
, int);
55 static int default_region_ok_for_hw_watchpoint (struct target_ops
*,
58 static void default_rcmd (struct target_ops
*, char *, struct ui_file
*);
60 static ptid_t
default_get_ada_task_ptid (struct target_ops
*self
,
63 static void tcomplain (void) ATTRIBUTE_NORETURN
;
65 static int nomemory (CORE_ADDR
, char *, int, int, struct target_ops
*);
67 static int return_zero (void);
69 static int return_minus_one (void);
71 static void *return_null (void);
73 void target_ignore (void);
75 static void target_command (char *, int);
77 static struct target_ops
*find_default_run_target (char *);
79 static target_xfer_partial_ftype default_xfer_partial
;
81 static struct gdbarch
*default_thread_architecture (struct target_ops
*ops
,
84 static int dummy_find_memory_regions (struct target_ops
*self
,
85 find_memory_region_ftype ignore1
,
88 static char *dummy_make_corefile_notes (struct target_ops
*self
,
89 bfd
*ignore1
, int *ignore2
);
91 static int find_default_can_async_p (struct target_ops
*ignore
);
93 static int find_default_is_async_p (struct target_ops
*ignore
);
95 static enum exec_direction_kind default_execution_direction
96 (struct target_ops
*self
);
98 #include "target-delegates.c"
100 static void init_dummy_target (void);
102 static struct target_ops debug_target
;
104 static void debug_to_open (char *, int);
106 static void debug_to_prepare_to_store (struct target_ops
*self
,
109 static void debug_to_files_info (struct target_ops
*);
111 static int debug_to_insert_breakpoint (struct target_ops
*, struct gdbarch
*,
112 struct bp_target_info
*);
114 static int debug_to_remove_breakpoint (struct target_ops
*, struct gdbarch
*,
115 struct bp_target_info
*);
117 static int debug_to_can_use_hw_breakpoint (struct target_ops
*self
,
120 static int debug_to_insert_hw_breakpoint (struct target_ops
*self
,
122 struct bp_target_info
*);
124 static int debug_to_remove_hw_breakpoint (struct target_ops
*self
,
126 struct bp_target_info
*);
128 static int debug_to_insert_watchpoint (struct target_ops
*self
,
130 struct expression
*);
132 static int debug_to_remove_watchpoint (struct target_ops
*self
,
134 struct expression
*);
136 static int debug_to_stopped_data_address (struct target_ops
*, CORE_ADDR
*);
138 static int debug_to_watchpoint_addr_within_range (struct target_ops
*,
139 CORE_ADDR
, CORE_ADDR
, int);
141 static int debug_to_region_ok_for_hw_watchpoint (struct target_ops
*self
,
144 static int debug_to_can_accel_watchpoint_condition (struct target_ops
*self
,
146 struct expression
*);
148 static void debug_to_terminal_init (struct target_ops
*self
);
150 static void debug_to_terminal_inferior (struct target_ops
*self
);
152 static void debug_to_terminal_ours_for_output (struct target_ops
*self
);
154 static void debug_to_terminal_save_ours (struct target_ops
*self
);
156 static void debug_to_terminal_ours (struct target_ops
*self
);
158 static void debug_to_load (struct target_ops
*self
, char *, int);
160 static int debug_to_can_run (struct target_ops
*self
);
162 static void debug_to_stop (struct target_ops
*self
, ptid_t
);
164 /* Pointer to array of target architecture structures; the size of the
165 array; the current index into the array; the allocated size of the
167 struct target_ops
**target_structs
;
168 unsigned target_struct_size
;
169 unsigned target_struct_allocsize
;
170 #define DEFAULT_ALLOCSIZE 10
172 /* The initial current target, so that there is always a semi-valid
175 static struct target_ops dummy_target
;
177 /* Top of target stack. */
179 static struct target_ops
*target_stack
;
181 /* The target structure we are currently using to talk to a process
182 or file or whatever "inferior" we have. */
184 struct target_ops current_target
;
186 /* Command list for target. */
188 static struct cmd_list_element
*targetlist
= NULL
;
190 /* Nonzero if we should trust readonly sections from the
191 executable when reading memory. */
193 static int trust_readonly
= 0;
195 /* Nonzero if we should show true memory content including
196 memory breakpoint inserted by gdb. */
198 static int show_memory_breakpoints
= 0;
200 /* These globals control whether GDB attempts to perform these
201 operations; they are useful for targets that need to prevent
202 inadvertant disruption, such as in non-stop mode. */
204 int may_write_registers
= 1;
206 int may_write_memory
= 1;
208 int may_insert_breakpoints
= 1;
210 int may_insert_tracepoints
= 1;
212 int may_insert_fast_tracepoints
= 1;
216 /* Non-zero if we want to see trace of target level stuff. */
218 static unsigned int targetdebug
= 0;
220 show_targetdebug (struct ui_file
*file
, int from_tty
,
221 struct cmd_list_element
*c
, const char *value
)
223 fprintf_filtered (file
, _("Target debugging is %s.\n"), value
);
226 static void setup_target_debug (void);
228 /* The user just typed 'target' without the name of a target. */
231 target_command (char *arg
, int from_tty
)
233 fputs_filtered ("Argument required (target name). Try `help target'\n",
237 /* Default target_has_* methods for process_stratum targets. */
240 default_child_has_all_memory (struct target_ops
*ops
)
242 /* If no inferior selected, then we can't read memory here. */
243 if (ptid_equal (inferior_ptid
, null_ptid
))
250 default_child_has_memory (struct target_ops
*ops
)
252 /* If no inferior selected, then we can't read memory here. */
253 if (ptid_equal (inferior_ptid
, null_ptid
))
260 default_child_has_stack (struct target_ops
*ops
)
262 /* If no inferior selected, there's no stack. */
263 if (ptid_equal (inferior_ptid
, null_ptid
))
270 default_child_has_registers (struct target_ops
*ops
)
272 /* Can't read registers from no inferior. */
273 if (ptid_equal (inferior_ptid
, null_ptid
))
280 default_child_has_execution (struct target_ops
*ops
, ptid_t the_ptid
)
282 /* If there's no thread selected, then we can't make it run through
284 if (ptid_equal (the_ptid
, null_ptid
))
292 target_has_all_memory_1 (void)
294 struct target_ops
*t
;
296 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
297 if (t
->to_has_all_memory (t
))
304 target_has_memory_1 (void)
306 struct target_ops
*t
;
308 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
309 if (t
->to_has_memory (t
))
316 target_has_stack_1 (void)
318 struct target_ops
*t
;
320 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
321 if (t
->to_has_stack (t
))
328 target_has_registers_1 (void)
330 struct target_ops
*t
;
332 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
333 if (t
->to_has_registers (t
))
340 target_has_execution_1 (ptid_t the_ptid
)
342 struct target_ops
*t
;
344 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
345 if (t
->to_has_execution (t
, the_ptid
))
352 target_has_execution_current (void)
354 return target_has_execution_1 (inferior_ptid
);
357 /* Complete initialization of T. This ensures that various fields in
358 T are set, if needed by the target implementation. */
361 complete_target_initialization (struct target_ops
*t
)
363 /* Provide default values for all "must have" methods. */
364 if (t
->to_xfer_partial
== NULL
)
365 t
->to_xfer_partial
= default_xfer_partial
;
367 if (t
->to_has_all_memory
== NULL
)
368 t
->to_has_all_memory
= (int (*) (struct target_ops
*)) return_zero
;
370 if (t
->to_has_memory
== NULL
)
371 t
->to_has_memory
= (int (*) (struct target_ops
*)) return_zero
;
373 if (t
->to_has_stack
== NULL
)
374 t
->to_has_stack
= (int (*) (struct target_ops
*)) return_zero
;
376 if (t
->to_has_registers
== NULL
)
377 t
->to_has_registers
= (int (*) (struct target_ops
*)) return_zero
;
379 if (t
->to_has_execution
== NULL
)
380 t
->to_has_execution
= (int (*) (struct target_ops
*, ptid_t
)) return_zero
;
382 install_delegators (t
);
385 /* Add possible target architecture T to the list and add a new
386 command 'target T->to_shortname'. Set COMPLETER as the command's
387 completer if not NULL. */
390 add_target_with_completer (struct target_ops
*t
,
391 completer_ftype
*completer
)
393 struct cmd_list_element
*c
;
395 complete_target_initialization (t
);
399 target_struct_allocsize
= DEFAULT_ALLOCSIZE
;
400 target_structs
= (struct target_ops
**) xmalloc
401 (target_struct_allocsize
* sizeof (*target_structs
));
403 if (target_struct_size
>= target_struct_allocsize
)
405 target_struct_allocsize
*= 2;
406 target_structs
= (struct target_ops
**)
407 xrealloc ((char *) target_structs
,
408 target_struct_allocsize
* sizeof (*target_structs
));
410 target_structs
[target_struct_size
++] = t
;
412 if (targetlist
== NULL
)
413 add_prefix_cmd ("target", class_run
, target_command
, _("\
414 Connect to a target machine or process.\n\
415 The first argument is the type or protocol of the target machine.\n\
416 Remaining arguments are interpreted by the target protocol. For more\n\
417 information on the arguments for a particular protocol, type\n\
418 `help target ' followed by the protocol name."),
419 &targetlist
, "target ", 0, &cmdlist
);
420 c
= add_cmd (t
->to_shortname
, no_class
, t
->to_open
, t
->to_doc
,
422 if (completer
!= NULL
)
423 set_cmd_completer (c
, completer
);
426 /* Add a possible target architecture to the list. */
429 add_target (struct target_ops
*t
)
431 add_target_with_completer (t
, NULL
);
437 add_deprecated_target_alias (struct target_ops
*t
, char *alias
)
439 struct cmd_list_element
*c
;
442 /* If we use add_alias_cmd, here, we do not get the deprecated warning,
444 c
= add_cmd (alias
, no_class
, t
->to_open
, t
->to_doc
, &targetlist
);
445 alt
= xstrprintf ("target %s", t
->to_shortname
);
446 deprecate_cmd (c
, alt
);
459 struct target_ops
*t
;
461 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
462 if (t
->to_kill
!= NULL
)
465 fprintf_unfiltered (gdb_stdlog
, "target_kill ()\n");
475 target_load (char *arg
, int from_tty
)
477 target_dcache_invalidate ();
478 (*current_target
.to_load
) (¤t_target
, arg
, from_tty
);
482 target_create_inferior (char *exec_file
, char *args
,
483 char **env
, int from_tty
)
485 struct target_ops
*t
;
487 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
489 if (t
->to_create_inferior
!= NULL
)
491 t
->to_create_inferior (t
, exec_file
, args
, env
, from_tty
);
493 fprintf_unfiltered (gdb_stdlog
,
494 "target_create_inferior (%s, %s, xxx, %d)\n",
495 exec_file
, args
, from_tty
);
500 internal_error (__FILE__
, __LINE__
,
501 _("could not find a target to create inferior"));
505 target_terminal_inferior (void)
507 /* A background resume (``run&'') should leave GDB in control of the
508 terminal. Use target_can_async_p, not target_is_async_p, since at
509 this point the target is not async yet. However, if sync_execution
510 is not set, we know it will become async prior to resume. */
511 if (target_can_async_p () && !sync_execution
)
514 /* If GDB is resuming the inferior in the foreground, install
515 inferior's terminal modes. */
516 (*current_target
.to_terminal_inferior
) (¤t_target
);
520 nomemory (CORE_ADDR memaddr
, char *myaddr
, int len
, int write
,
521 struct target_ops
*t
)
523 errno
= EIO
; /* Can't read/write this location. */
524 return 0; /* No bytes handled. */
530 error (_("You can't do that when your target is `%s'"),
531 current_target
.to_shortname
);
537 error (_("You can't do that without a process to debug."));
541 default_terminal_info (struct target_ops
*self
, const char *args
, int from_tty
)
543 printf_unfiltered (_("No saved terminal information.\n"));
546 /* A default implementation for the to_get_ada_task_ptid target method.
548 This function builds the PTID by using both LWP and TID as part of
549 the PTID lwp and tid elements. The pid used is the pid of the
553 default_get_ada_task_ptid (struct target_ops
*self
, long lwp
, long tid
)
555 return ptid_build (ptid_get_pid (inferior_ptid
), lwp
, tid
);
558 static enum exec_direction_kind
559 default_execution_direction (struct target_ops
*self
)
561 if (!target_can_execute_reverse
)
563 else if (!target_can_async_p ())
566 gdb_assert_not_reached ("\
567 to_execution_direction must be implemented for reverse async");
570 /* Go through the target stack from top to bottom, copying over zero
571 entries in current_target, then filling in still empty entries. In
572 effect, we are doing class inheritance through the pushed target
575 NOTE: cagney/2003-10-17: The problem with this inheritance, as it
576 is currently implemented, is that it discards any knowledge of
577 which target an inherited method originally belonged to.
578 Consequently, new new target methods should instead explicitly and
579 locally search the target stack for the target that can handle the
583 update_current_target (void)
585 struct target_ops
*t
;
587 /* First, reset current's contents. */
588 memset (¤t_target
, 0, sizeof (current_target
));
590 /* Install the delegators. */
591 install_delegators (¤t_target
);
593 #define INHERIT(FIELD, TARGET) \
594 if (!current_target.FIELD) \
595 current_target.FIELD = (TARGET)->FIELD
597 for (t
= target_stack
; t
; t
= t
->beneath
)
599 INHERIT (to_shortname
, t
);
600 INHERIT (to_longname
, t
);
602 /* Do not inherit to_open. */
603 /* Do not inherit to_close. */
604 /* Do not inherit to_attach. */
605 /* Do not inherit to_post_attach. */
606 INHERIT (to_attach_no_wait
, t
);
607 /* Do not inherit to_detach. */
608 /* Do not inherit to_disconnect. */
609 /* Do not inherit to_resume. */
610 /* Do not inherit to_wait. */
611 /* Do not inherit to_fetch_registers. */
612 /* Do not inherit to_store_registers. */
613 /* Do not inherit to_prepare_to_store. */
614 INHERIT (deprecated_xfer_memory
, t
);
615 /* Do not inherit to_files_info. */
616 /* Do not inherit to_insert_breakpoint. */
617 /* Do not inherit to_remove_breakpoint. */
618 /* Do not inherit to_can_use_hw_breakpoint. */
619 /* Do not inherit to_insert_hw_breakpoint. */
620 /* Do not inherit to_remove_hw_breakpoint. */
621 /* Do not inherit to_ranged_break_num_registers. */
622 /* Do not inherit to_insert_watchpoint. */
623 /* Do not inherit to_remove_watchpoint. */
624 /* Do not inherit to_insert_mask_watchpoint. */
625 /* Do not inherit to_remove_mask_watchpoint. */
626 /* Do not inherit to_stopped_data_address. */
627 INHERIT (to_have_steppable_watchpoint
, t
);
628 INHERIT (to_have_continuable_watchpoint
, t
);
629 /* Do not inherit to_stopped_by_watchpoint. */
630 /* Do not inherit to_watchpoint_addr_within_range. */
631 /* Do not inherit to_region_ok_for_hw_watchpoint. */
632 /* Do not inherit to_can_accel_watchpoint_condition. */
633 /* Do not inherit to_masked_watch_num_registers. */
634 /* Do not inherit to_terminal_init. */
635 /* Do not inherit to_terminal_inferior. */
636 /* Do not inherit to_terminal_ours_for_output. */
637 /* Do not inherit to_terminal_ours. */
638 /* Do not inherit to_terminal_save_ours. */
639 /* Do not inherit to_terminal_info. */
640 /* Do not inherit to_kill. */
641 /* Do not inherit to_load. */
642 /* Do no inherit to_create_inferior. */
643 /* Do not inherit to_post_startup_inferior. */
644 /* Do not inherit to_insert_fork_catchpoint. */
645 /* Do not inherit to_remove_fork_catchpoint. */
646 /* Do not inherit to_insert_vfork_catchpoint. */
647 /* Do not inherit to_remove_vfork_catchpoint. */
648 /* Do not inherit to_follow_fork. */
649 /* Do not inherit to_insert_exec_catchpoint. */
650 /* Do not inherit to_remove_exec_catchpoint. */
651 /* Do not inherit to_set_syscall_catchpoint. */
652 /* Do not inherit to_has_exited. */
653 /* Do not inherit to_mourn_inferior. */
654 INHERIT (to_can_run
, t
);
655 /* Do not inherit to_pass_signals. */
656 /* Do not inherit to_program_signals. */
657 /* Do not inherit to_thread_alive. */
658 /* Do not inherit to_find_new_threads. */
659 /* Do not inherit to_pid_to_str. */
660 /* Do not inherit to_extra_thread_info. */
661 /* Do not inherit to_thread_name. */
662 INHERIT (to_stop
, t
);
663 /* Do not inherit to_xfer_partial. */
664 /* Do not inherit to_rcmd. */
665 /* Do not inherit to_pid_to_exec_file. */
666 /* Do not inherit to_log_command. */
667 INHERIT (to_stratum
, t
);
668 /* Do not inherit to_has_all_memory. */
669 /* Do not inherit to_has_memory. */
670 /* Do not inherit to_has_stack. */
671 /* Do not inherit to_has_registers. */
672 /* Do not inherit to_has_execution. */
673 INHERIT (to_has_thread_control
, t
);
674 /* Do not inherit to_can_async_p. */
675 /* Do not inherit to_is_async_p. */
676 /* Do not inherit to_async. */
677 /* Do not inherit to_find_memory_regions. */
678 /* Do not inherit to_make_corefile_notes. */
679 /* Do not inherit to_get_bookmark. */
680 /* Do not inherit to_goto_bookmark. */
681 /* Do not inherit to_get_thread_local_address. */
682 /* Do not inherit to_can_execute_reverse. */
683 /* Do not inherit to_execution_direction. */
684 /* Do not inherit to_thread_architecture. */
685 /* Do not inherit to_read_description. */
686 /* Do not inherit to_get_ada_task_ptid. */
687 /* Do not inherit to_search_memory. */
688 /* Do not inherit to_supports_multi_process. */
689 /* Do not inherit to_supports_enable_disable_tracepoint. */
690 /* Do not inherit to_supports_string_tracing. */
691 /* Do not inherit to_trace_init. */
692 INHERIT (to_download_tracepoint
, t
);
693 INHERIT (to_can_download_tracepoint
, t
);
694 INHERIT (to_download_trace_state_variable
, t
);
695 INHERIT (to_enable_tracepoint
, t
);
696 INHERIT (to_disable_tracepoint
, t
);
697 INHERIT (to_trace_set_readonly_regions
, t
);
698 INHERIT (to_trace_start
, t
);
699 INHERIT (to_get_trace_status
, t
);
700 INHERIT (to_get_tracepoint_status
, t
);
701 INHERIT (to_trace_stop
, t
);
702 INHERIT (to_trace_find
, t
);
703 INHERIT (to_get_trace_state_variable_value
, t
);
704 INHERIT (to_save_trace_data
, t
);
705 INHERIT (to_upload_tracepoints
, t
);
706 INHERIT (to_upload_trace_state_variables
, t
);
707 INHERIT (to_get_raw_trace_data
, t
);
708 INHERIT (to_get_min_fast_tracepoint_insn_len
, t
);
709 INHERIT (to_set_disconnected_tracing
, t
);
710 INHERIT (to_set_circular_trace_buffer
, t
);
711 INHERIT (to_set_trace_buffer_size
, t
);
712 INHERIT (to_set_trace_notes
, t
);
713 INHERIT (to_get_tib_address
, t
);
714 INHERIT (to_set_permissions
, t
);
715 INHERIT (to_static_tracepoint_marker_at
, t
);
716 INHERIT (to_static_tracepoint_markers_by_strid
, t
);
717 INHERIT (to_traceframe_info
, t
);
718 INHERIT (to_use_agent
, t
);
719 INHERIT (to_can_use_agent
, t
);
720 INHERIT (to_augmented_libraries_svr4_read
, t
);
721 INHERIT (to_magic
, t
);
722 INHERIT (to_supports_evaluation_of_breakpoint_conditions
, t
);
723 INHERIT (to_can_run_breakpoint_commands
, t
);
724 /* Do not inherit to_memory_map. */
725 /* Do not inherit to_flash_erase. */
726 /* Do not inherit to_flash_done. */
730 /* Clean up a target struct so it no longer has any zero pointers in
731 it. Some entries are defaulted to a method that print an error,
732 others are hard-wired to a standard recursive default. */
734 #define de_fault(field, value) \
735 if (!current_target.field) \
736 current_target.field = value
739 (void (*) (char *, int))
742 (void (*) (struct target_ops
*))
744 de_fault (deprecated_xfer_memory
,
745 (int (*) (CORE_ADDR
, gdb_byte
*, int, int,
746 struct mem_attrib
*, struct target_ops
*))
748 de_fault (to_can_run
,
749 (int (*) (struct target_ops
*))
752 (void (*) (struct target_ops
*, ptid_t
))
754 current_target
.to_read_description
= NULL
;
755 de_fault (to_download_tracepoint
,
756 (void (*) (struct target_ops
*, struct bp_location
*))
758 de_fault (to_can_download_tracepoint
,
759 (int (*) (struct target_ops
*))
761 de_fault (to_download_trace_state_variable
,
762 (void (*) (struct target_ops
*, struct trace_state_variable
*))
764 de_fault (to_enable_tracepoint
,
765 (void (*) (struct target_ops
*, struct bp_location
*))
767 de_fault (to_disable_tracepoint
,
768 (void (*) (struct target_ops
*, struct bp_location
*))
770 de_fault (to_trace_set_readonly_regions
,
771 (void (*) (struct target_ops
*))
773 de_fault (to_trace_start
,
774 (void (*) (struct target_ops
*))
776 de_fault (to_get_trace_status
,
777 (int (*) (struct target_ops
*, struct trace_status
*))
779 de_fault (to_get_tracepoint_status
,
780 (void (*) (struct target_ops
*, struct breakpoint
*,
781 struct uploaded_tp
*))
783 de_fault (to_trace_stop
,
784 (void (*) (struct target_ops
*))
786 de_fault (to_trace_find
,
787 (int (*) (struct target_ops
*,
788 enum trace_find_type
, int, CORE_ADDR
, CORE_ADDR
, int *))
790 de_fault (to_get_trace_state_variable_value
,
791 (int (*) (struct target_ops
*, int, LONGEST
*))
793 de_fault (to_save_trace_data
,
794 (int (*) (struct target_ops
*, const char *))
796 de_fault (to_upload_tracepoints
,
797 (int (*) (struct target_ops
*, struct uploaded_tp
**))
799 de_fault (to_upload_trace_state_variables
,
800 (int (*) (struct target_ops
*, struct uploaded_tsv
**))
802 de_fault (to_get_raw_trace_data
,
803 (LONGEST (*) (struct target_ops
*, gdb_byte
*, ULONGEST
, LONGEST
))
805 de_fault (to_get_min_fast_tracepoint_insn_len
,
806 (int (*) (struct target_ops
*))
808 de_fault (to_set_disconnected_tracing
,
809 (void (*) (struct target_ops
*, int))
811 de_fault (to_set_circular_trace_buffer
,
812 (void (*) (struct target_ops
*, int))
814 de_fault (to_set_trace_buffer_size
,
815 (void (*) (struct target_ops
*, LONGEST
))
817 de_fault (to_set_trace_notes
,
818 (int (*) (struct target_ops
*,
819 const char *, const char *, const char *))
821 de_fault (to_get_tib_address
,
822 (int (*) (struct target_ops
*, ptid_t
, CORE_ADDR
*))
824 de_fault (to_set_permissions
,
825 (void (*) (struct target_ops
*))
827 de_fault (to_static_tracepoint_marker_at
,
828 (int (*) (struct target_ops
*,
829 CORE_ADDR
, struct static_tracepoint_marker
*))
831 de_fault (to_static_tracepoint_markers_by_strid
,
832 (VEC(static_tracepoint_marker_p
) * (*) (struct target_ops
*,
835 de_fault (to_traceframe_info
,
836 (struct traceframe_info
* (*) (struct target_ops
*))
838 de_fault (to_supports_evaluation_of_breakpoint_conditions
,
839 (int (*) (struct target_ops
*))
841 de_fault (to_can_run_breakpoint_commands
,
842 (int (*) (struct target_ops
*))
844 de_fault (to_use_agent
,
845 (int (*) (struct target_ops
*, int))
847 de_fault (to_can_use_agent
,
848 (int (*) (struct target_ops
*))
850 de_fault (to_augmented_libraries_svr4_read
,
851 (int (*) (struct target_ops
*))
856 /* Finally, position the target-stack beneath the squashed
857 "current_target". That way code looking for a non-inherited
858 target method can quickly and simply find it. */
859 current_target
.beneath
= target_stack
;
862 setup_target_debug ();
865 /* Push a new target type into the stack of the existing target accessors,
866 possibly superseding some of the existing accessors.
868 Rather than allow an empty stack, we always have the dummy target at
869 the bottom stratum, so we can call the function vectors without
873 push_target (struct target_ops
*t
)
875 struct target_ops
**cur
;
877 /* Check magic number. If wrong, it probably means someone changed
878 the struct definition, but not all the places that initialize one. */
879 if (t
->to_magic
!= OPS_MAGIC
)
881 fprintf_unfiltered (gdb_stderr
,
882 "Magic number of %s target struct wrong\n",
884 internal_error (__FILE__
, __LINE__
,
885 _("failed internal consistency check"));
888 /* Find the proper stratum to install this target in. */
889 for (cur
= &target_stack
; (*cur
) != NULL
; cur
= &(*cur
)->beneath
)
891 if ((int) (t
->to_stratum
) >= (int) (*cur
)->to_stratum
)
895 /* If there's already targets at this stratum, remove them. */
896 /* FIXME: cagney/2003-10-15: I think this should be popping all
897 targets to CUR, and not just those at this stratum level. */
898 while ((*cur
) != NULL
&& t
->to_stratum
== (*cur
)->to_stratum
)
900 /* There's already something at this stratum level. Close it,
901 and un-hook it from the stack. */
902 struct target_ops
*tmp
= (*cur
);
904 (*cur
) = (*cur
)->beneath
;
909 /* We have removed all targets in our stratum, now add the new one. */
913 update_current_target ();
916 /* Remove a target_ops vector from the stack, wherever it may be.
917 Return how many times it was removed (0 or 1). */
920 unpush_target (struct target_ops
*t
)
922 struct target_ops
**cur
;
923 struct target_ops
*tmp
;
925 if (t
->to_stratum
== dummy_stratum
)
926 internal_error (__FILE__
, __LINE__
,
927 _("Attempt to unpush the dummy target"));
929 /* Look for the specified target. Note that we assume that a target
930 can only occur once in the target stack. */
932 for (cur
= &target_stack
; (*cur
) != NULL
; cur
= &(*cur
)->beneath
)
938 /* If we don't find target_ops, quit. Only open targets should be
943 /* Unchain the target. */
945 (*cur
) = (*cur
)->beneath
;
948 update_current_target ();
950 /* Finally close the target. Note we do this after unchaining, so
951 any target method calls from within the target_close
952 implementation don't end up in T anymore. */
959 pop_all_targets_above (enum strata above_stratum
)
961 while ((int) (current_target
.to_stratum
) > (int) above_stratum
)
963 if (!unpush_target (target_stack
))
965 fprintf_unfiltered (gdb_stderr
,
966 "pop_all_targets couldn't find target %s\n",
967 target_stack
->to_shortname
);
968 internal_error (__FILE__
, __LINE__
,
969 _("failed internal consistency check"));
976 pop_all_targets (void)
978 pop_all_targets_above (dummy_stratum
);
981 /* Return 1 if T is now pushed in the target stack. Return 0 otherwise. */
984 target_is_pushed (struct target_ops
*t
)
986 struct target_ops
**cur
;
988 /* Check magic number. If wrong, it probably means someone changed
989 the struct definition, but not all the places that initialize one. */
990 if (t
->to_magic
!= OPS_MAGIC
)
992 fprintf_unfiltered (gdb_stderr
,
993 "Magic number of %s target struct wrong\n",
995 internal_error (__FILE__
, __LINE__
,
996 _("failed internal consistency check"));
999 for (cur
= &target_stack
; (*cur
) != NULL
; cur
= &(*cur
)->beneath
)
1006 /* Using the objfile specified in OBJFILE, find the address for the
1007 current thread's thread-local storage with offset OFFSET. */
1009 target_translate_tls_address (struct objfile
*objfile
, CORE_ADDR offset
)
1011 volatile CORE_ADDR addr
= 0;
1012 struct target_ops
*target
;
1014 for (target
= current_target
.beneath
;
1016 target
= target
->beneath
)
1018 if (target
->to_get_thread_local_address
!= NULL
)
1023 && gdbarch_fetch_tls_load_module_address_p (target_gdbarch ()))
1025 ptid_t ptid
= inferior_ptid
;
1026 volatile struct gdb_exception ex
;
1028 TRY_CATCH (ex
, RETURN_MASK_ALL
)
1032 /* Fetch the load module address for this objfile. */
1033 lm_addr
= gdbarch_fetch_tls_load_module_address (target_gdbarch (),
1035 /* If it's 0, throw the appropriate exception. */
1037 throw_error (TLS_LOAD_MODULE_NOT_FOUND_ERROR
,
1038 _("TLS load module not found"));
1040 addr
= target
->to_get_thread_local_address (target
, ptid
,
1043 /* If an error occurred, print TLS related messages here. Otherwise,
1044 throw the error to some higher catcher. */
1047 int objfile_is_library
= (objfile
->flags
& OBJF_SHARED
);
1051 case TLS_NO_LIBRARY_SUPPORT_ERROR
:
1052 error (_("Cannot find thread-local variables "
1053 "in this thread library."));
1055 case TLS_LOAD_MODULE_NOT_FOUND_ERROR
:
1056 if (objfile_is_library
)
1057 error (_("Cannot find shared library `%s' in dynamic"
1058 " linker's load module list"), objfile_name (objfile
));
1060 error (_("Cannot find executable file `%s' in dynamic"
1061 " linker's load module list"), objfile_name (objfile
));
1063 case TLS_NOT_ALLOCATED_YET_ERROR
:
1064 if (objfile_is_library
)
1065 error (_("The inferior has not yet allocated storage for"
1066 " thread-local variables in\n"
1067 "the shared library `%s'\n"
1069 objfile_name (objfile
), target_pid_to_str (ptid
));
1071 error (_("The inferior has not yet allocated storage for"
1072 " thread-local variables in\n"
1073 "the executable `%s'\n"
1075 objfile_name (objfile
), target_pid_to_str (ptid
));
1077 case TLS_GENERIC_ERROR
:
1078 if (objfile_is_library
)
1079 error (_("Cannot find thread-local storage for %s, "
1080 "shared library %s:\n%s"),
1081 target_pid_to_str (ptid
),
1082 objfile_name (objfile
), ex
.message
);
1084 error (_("Cannot find thread-local storage for %s, "
1085 "executable file %s:\n%s"),
1086 target_pid_to_str (ptid
),
1087 objfile_name (objfile
), ex
.message
);
1090 throw_exception (ex
);
1095 /* It wouldn't be wrong here to try a gdbarch method, too; finding
1096 TLS is an ABI-specific thing. But we don't do that yet. */
1098 error (_("Cannot find thread-local variables on this target"));
1104 target_xfer_status_to_string (enum target_xfer_status err
)
1106 #define CASE(X) case X: return #X
1109 CASE(TARGET_XFER_E_IO
);
1110 CASE(TARGET_XFER_E_UNAVAILABLE
);
1119 #define MIN(A, B) (((A) <= (B)) ? (A) : (B))
1121 /* target_read_string -- read a null terminated string, up to LEN bytes,
1122 from MEMADDR in target. Set *ERRNOP to the errno code, or 0 if successful.
1123 Set *STRING to a pointer to malloc'd memory containing the data; the caller
1124 is responsible for freeing it. Return the number of bytes successfully
1128 target_read_string (CORE_ADDR memaddr
, char **string
, int len
, int *errnop
)
1130 int tlen
, offset
, i
;
1134 int buffer_allocated
;
1136 unsigned int nbytes_read
= 0;
1138 gdb_assert (string
);
1140 /* Small for testing. */
1141 buffer_allocated
= 4;
1142 buffer
= xmalloc (buffer_allocated
);
1147 tlen
= MIN (len
, 4 - (memaddr
& 3));
1148 offset
= memaddr
& 3;
1150 errcode
= target_read_memory (memaddr
& ~3, buf
, sizeof buf
);
1153 /* The transfer request might have crossed the boundary to an
1154 unallocated region of memory. Retry the transfer, requesting
1158 errcode
= target_read_memory (memaddr
, buf
, 1);
1163 if (bufptr
- buffer
+ tlen
> buffer_allocated
)
1167 bytes
= bufptr
- buffer
;
1168 buffer_allocated
*= 2;
1169 buffer
= xrealloc (buffer
, buffer_allocated
);
1170 bufptr
= buffer
+ bytes
;
1173 for (i
= 0; i
< tlen
; i
++)
1175 *bufptr
++ = buf
[i
+ offset
];
1176 if (buf
[i
+ offset
] == '\000')
1178 nbytes_read
+= i
+ 1;
1185 nbytes_read
+= tlen
;
1194 struct target_section_table
*
1195 target_get_section_table (struct target_ops
*target
)
1197 struct target_ops
*t
;
1200 fprintf_unfiltered (gdb_stdlog
, "target_get_section_table ()\n");
1202 for (t
= target
; t
!= NULL
; t
= t
->beneath
)
1203 if (t
->to_get_section_table
!= NULL
)
1204 return (*t
->to_get_section_table
) (t
);
1209 /* Find a section containing ADDR. */
1211 struct target_section
*
1212 target_section_by_addr (struct target_ops
*target
, CORE_ADDR addr
)
1214 struct target_section_table
*table
= target_get_section_table (target
);
1215 struct target_section
*secp
;
1220 for (secp
= table
->sections
; secp
< table
->sections_end
; secp
++)
1222 if (addr
>= secp
->addr
&& addr
< secp
->endaddr
)
1228 /* Read memory from the live target, even if currently inspecting a
1229 traceframe. The return is the same as that of target_read. */
1231 static enum target_xfer_status
1232 target_read_live_memory (enum target_object object
,
1233 ULONGEST memaddr
, gdb_byte
*myaddr
, ULONGEST len
,
1234 ULONGEST
*xfered_len
)
1236 enum target_xfer_status ret
;
1237 struct cleanup
*cleanup
;
1239 /* Switch momentarily out of tfind mode so to access live memory.
1240 Note that this must not clear global state, such as the frame
1241 cache, which must still remain valid for the previous traceframe.
1242 We may be _building_ the frame cache at this point. */
1243 cleanup
= make_cleanup_restore_traceframe_number ();
1244 set_traceframe_number (-1);
1246 ret
= target_xfer_partial (current_target
.beneath
, object
, NULL
,
1247 myaddr
, NULL
, memaddr
, len
, xfered_len
);
1249 do_cleanups (cleanup
);
1253 /* Using the set of read-only target sections of OPS, read live
1254 read-only memory. Note that the actual reads start from the
1255 top-most target again.
1257 For interface/parameters/return description see target.h,
1260 static enum target_xfer_status
1261 memory_xfer_live_readonly_partial (struct target_ops
*ops
,
1262 enum target_object object
,
1263 gdb_byte
*readbuf
, ULONGEST memaddr
,
1264 ULONGEST len
, ULONGEST
*xfered_len
)
1266 struct target_section
*secp
;
1267 struct target_section_table
*table
;
1269 secp
= target_section_by_addr (ops
, memaddr
);
1271 && (bfd_get_section_flags (secp
->the_bfd_section
->owner
,
1272 secp
->the_bfd_section
)
1275 struct target_section
*p
;
1276 ULONGEST memend
= memaddr
+ len
;
1278 table
= target_get_section_table (ops
);
1280 for (p
= table
->sections
; p
< table
->sections_end
; p
++)
1282 if (memaddr
>= p
->addr
)
1284 if (memend
<= p
->endaddr
)
1286 /* Entire transfer is within this section. */
1287 return target_read_live_memory (object
, memaddr
,
1288 readbuf
, len
, xfered_len
);
1290 else if (memaddr
>= p
->endaddr
)
1292 /* This section ends before the transfer starts. */
1297 /* This section overlaps the transfer. Just do half. */
1298 len
= p
->endaddr
- memaddr
;
1299 return target_read_live_memory (object
, memaddr
,
1300 readbuf
, len
, xfered_len
);
1306 return TARGET_XFER_EOF
;
1309 /* Read memory from more than one valid target. A core file, for
1310 instance, could have some of memory but delegate other bits to
1311 the target below it. So, we must manually try all targets. */
1313 static enum target_xfer_status
1314 raw_memory_xfer_partial (struct target_ops
*ops
, gdb_byte
*readbuf
,
1315 const gdb_byte
*writebuf
, ULONGEST memaddr
, LONGEST len
,
1316 ULONGEST
*xfered_len
)
1318 enum target_xfer_status res
;
1322 res
= ops
->to_xfer_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1323 readbuf
, writebuf
, memaddr
, len
,
1325 if (res
== TARGET_XFER_OK
)
1328 /* Stop if the target reports that the memory is not available. */
1329 if (res
== TARGET_XFER_E_UNAVAILABLE
)
1332 /* We want to continue past core files to executables, but not
1333 past a running target's memory. */
1334 if (ops
->to_has_all_memory (ops
))
1339 while (ops
!= NULL
);
1344 /* Perform a partial memory transfer.
1345 For docs see target.h, to_xfer_partial. */
1347 static enum target_xfer_status
1348 memory_xfer_partial_1 (struct target_ops
*ops
, enum target_object object
,
1349 gdb_byte
*readbuf
, const gdb_byte
*writebuf
, ULONGEST memaddr
,
1350 ULONGEST len
, ULONGEST
*xfered_len
)
1352 enum target_xfer_status res
;
1354 struct mem_region
*region
;
1355 struct inferior
*inf
;
1357 /* For accesses to unmapped overlay sections, read directly from
1358 files. Must do this first, as MEMADDR may need adjustment. */
1359 if (readbuf
!= NULL
&& overlay_debugging
)
1361 struct obj_section
*section
= find_pc_overlay (memaddr
);
1363 if (pc_in_unmapped_range (memaddr
, section
))
1365 struct target_section_table
*table
1366 = target_get_section_table (ops
);
1367 const char *section_name
= section
->the_bfd_section
->name
;
1369 memaddr
= overlay_mapped_address (memaddr
, section
);
1370 return section_table_xfer_memory_partial (readbuf
, writebuf
,
1371 memaddr
, len
, xfered_len
,
1373 table
->sections_end
,
1378 /* Try the executable files, if "trust-readonly-sections" is set. */
1379 if (readbuf
!= NULL
&& trust_readonly
)
1381 struct target_section
*secp
;
1382 struct target_section_table
*table
;
1384 secp
= target_section_by_addr (ops
, memaddr
);
1386 && (bfd_get_section_flags (secp
->the_bfd_section
->owner
,
1387 secp
->the_bfd_section
)
1390 table
= target_get_section_table (ops
);
1391 return section_table_xfer_memory_partial (readbuf
, writebuf
,
1392 memaddr
, len
, xfered_len
,
1394 table
->sections_end
,
1399 /* If reading unavailable memory in the context of traceframes, and
1400 this address falls within a read-only section, fallback to
1401 reading from live memory. */
1402 if (readbuf
!= NULL
&& get_traceframe_number () != -1)
1404 VEC(mem_range_s
) *available
;
1406 /* If we fail to get the set of available memory, then the
1407 target does not support querying traceframe info, and so we
1408 attempt reading from the traceframe anyway (assuming the
1409 target implements the old QTro packet then). */
1410 if (traceframe_available_memory (&available
, memaddr
, len
))
1412 struct cleanup
*old_chain
;
1414 old_chain
= make_cleanup (VEC_cleanup(mem_range_s
), &available
);
1416 if (VEC_empty (mem_range_s
, available
)
1417 || VEC_index (mem_range_s
, available
, 0)->start
!= memaddr
)
1419 /* Don't read into the traceframe's available
1421 if (!VEC_empty (mem_range_s
, available
))
1423 LONGEST oldlen
= len
;
1425 len
= VEC_index (mem_range_s
, available
, 0)->start
- memaddr
;
1426 gdb_assert (len
<= oldlen
);
1429 do_cleanups (old_chain
);
1431 /* This goes through the topmost target again. */
1432 res
= memory_xfer_live_readonly_partial (ops
, object
,
1435 if (res
== TARGET_XFER_OK
)
1436 return TARGET_XFER_OK
;
1439 /* No use trying further, we know some memory starting
1440 at MEMADDR isn't available. */
1442 return TARGET_XFER_E_UNAVAILABLE
;
1446 /* Don't try to read more than how much is available, in
1447 case the target implements the deprecated QTro packet to
1448 cater for older GDBs (the target's knowledge of read-only
1449 sections may be outdated by now). */
1450 len
= VEC_index (mem_range_s
, available
, 0)->length
;
1452 do_cleanups (old_chain
);
1456 /* Try GDB's internal data cache. */
1457 region
= lookup_mem_region (memaddr
);
1458 /* region->hi == 0 means there's no upper bound. */
1459 if (memaddr
+ len
< region
->hi
|| region
->hi
== 0)
1462 reg_len
= region
->hi
- memaddr
;
1464 switch (region
->attrib
.mode
)
1467 if (writebuf
!= NULL
)
1468 return TARGET_XFER_E_IO
;
1472 if (readbuf
!= NULL
)
1473 return TARGET_XFER_E_IO
;
1477 /* We only support writing to flash during "load" for now. */
1478 if (writebuf
!= NULL
)
1479 error (_("Writing to flash memory forbidden in this context"));
1483 return TARGET_XFER_E_IO
;
1486 if (!ptid_equal (inferior_ptid
, null_ptid
))
1487 inf
= find_inferior_pid (ptid_get_pid (inferior_ptid
));
1492 /* The dcache reads whole cache lines; that doesn't play well
1493 with reading from a trace buffer, because reading outside of
1494 the collected memory range fails. */
1495 && get_traceframe_number () == -1
1496 && (region
->attrib
.cache
1497 || (stack_cache_enabled_p () && object
== TARGET_OBJECT_STACK_MEMORY
)
1498 || (code_cache_enabled_p () && object
== TARGET_OBJECT_CODE_MEMORY
)))
1500 DCACHE
*dcache
= target_dcache_get_or_init ();
1503 if (readbuf
!= NULL
)
1504 l
= dcache_xfer_memory (ops
, dcache
, memaddr
, readbuf
, reg_len
, 0);
1506 /* FIXME drow/2006-08-09: If we're going to preserve const
1507 correctness dcache_xfer_memory should take readbuf and
1509 l
= dcache_xfer_memory (ops
, dcache
, memaddr
, (void *) writebuf
,
1512 return TARGET_XFER_E_IO
;
1515 *xfered_len
= (ULONGEST
) l
;
1516 return TARGET_XFER_OK
;
1520 /* If none of those methods found the memory we wanted, fall back
1521 to a target partial transfer. Normally a single call to
1522 to_xfer_partial is enough; if it doesn't recognize an object
1523 it will call the to_xfer_partial of the next target down.
1524 But for memory this won't do. Memory is the only target
1525 object which can be read from more than one valid target.
1526 A core file, for instance, could have some of memory but
1527 delegate other bits to the target below it. So, we must
1528 manually try all targets. */
1530 res
= raw_memory_xfer_partial (ops
, readbuf
, writebuf
, memaddr
, reg_len
,
1533 /* Make sure the cache gets updated no matter what - if we are writing
1534 to the stack. Even if this write is not tagged as such, we still need
1535 to update the cache. */
1537 if (res
== TARGET_XFER_OK
1540 && target_dcache_init_p ()
1541 && !region
->attrib
.cache
1542 && ((stack_cache_enabled_p () && object
!= TARGET_OBJECT_STACK_MEMORY
)
1543 || (code_cache_enabled_p () && object
!= TARGET_OBJECT_CODE_MEMORY
)))
1545 DCACHE
*dcache
= target_dcache_get ();
1547 dcache_update (dcache
, memaddr
, (void *) writebuf
, reg_len
);
1550 /* If we still haven't got anything, return the last error. We
1555 /* Perform a partial memory transfer. For docs see target.h,
1558 static enum target_xfer_status
1559 memory_xfer_partial (struct target_ops
*ops
, enum target_object object
,
1560 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1561 ULONGEST memaddr
, ULONGEST len
, ULONGEST
*xfered_len
)
1563 enum target_xfer_status res
;
1565 /* Zero length requests are ok and require no work. */
1567 return TARGET_XFER_EOF
;
1569 /* Fill in READBUF with breakpoint shadows, or WRITEBUF with
1570 breakpoint insns, thus hiding out from higher layers whether
1571 there are software breakpoints inserted in the code stream. */
1572 if (readbuf
!= NULL
)
1574 res
= memory_xfer_partial_1 (ops
, object
, readbuf
, NULL
, memaddr
, len
,
1577 if (res
== TARGET_XFER_OK
&& !show_memory_breakpoints
)
1578 breakpoint_xfer_memory (readbuf
, NULL
, NULL
, memaddr
, res
);
1583 struct cleanup
*old_chain
;
1585 /* A large write request is likely to be partially satisfied
1586 by memory_xfer_partial_1. We will continually malloc
1587 and free a copy of the entire write request for breakpoint
1588 shadow handling even though we only end up writing a small
1589 subset of it. Cap writes to 4KB to mitigate this. */
1590 len
= min (4096, len
);
1592 buf
= xmalloc (len
);
1593 old_chain
= make_cleanup (xfree
, buf
);
1594 memcpy (buf
, writebuf
, len
);
1596 breakpoint_xfer_memory (NULL
, buf
, writebuf
, memaddr
, len
);
1597 res
= memory_xfer_partial_1 (ops
, object
, NULL
, buf
, memaddr
, len
,
1600 do_cleanups (old_chain
);
1607 restore_show_memory_breakpoints (void *arg
)
1609 show_memory_breakpoints
= (uintptr_t) arg
;
1613 make_show_memory_breakpoints_cleanup (int show
)
1615 int current
= show_memory_breakpoints
;
1617 show_memory_breakpoints
= show
;
1618 return make_cleanup (restore_show_memory_breakpoints
,
1619 (void *) (uintptr_t) current
);
1622 /* For docs see target.h, to_xfer_partial. */
1624 enum target_xfer_status
1625 target_xfer_partial (struct target_ops
*ops
,
1626 enum target_object object
, const char *annex
,
1627 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1628 ULONGEST offset
, ULONGEST len
,
1629 ULONGEST
*xfered_len
)
1631 enum target_xfer_status retval
;
1633 gdb_assert (ops
->to_xfer_partial
!= NULL
);
1635 /* Transfer is done when LEN is zero. */
1637 return TARGET_XFER_EOF
;
1639 if (writebuf
&& !may_write_memory
)
1640 error (_("Writing to memory is not allowed (addr %s, len %s)"),
1641 core_addr_to_string_nz (offset
), plongest (len
));
1645 /* If this is a memory transfer, let the memory-specific code
1646 have a look at it instead. Memory transfers are more
1648 if (object
== TARGET_OBJECT_MEMORY
|| object
== TARGET_OBJECT_STACK_MEMORY
1649 || object
== TARGET_OBJECT_CODE_MEMORY
)
1650 retval
= memory_xfer_partial (ops
, object
, readbuf
,
1651 writebuf
, offset
, len
, xfered_len
);
1652 else if (object
== TARGET_OBJECT_RAW_MEMORY
)
1654 /* Request the normal memory object from other layers. */
1655 retval
= raw_memory_xfer_partial (ops
, readbuf
, writebuf
, offset
, len
,
1659 retval
= ops
->to_xfer_partial (ops
, object
, annex
, readbuf
,
1660 writebuf
, offset
, len
, xfered_len
);
1664 const unsigned char *myaddr
= NULL
;
1666 fprintf_unfiltered (gdb_stdlog
,
1667 "%s:target_xfer_partial "
1668 "(%d, %s, %s, %s, %s, %s) = %d, %s",
1671 (annex
? annex
: "(null)"),
1672 host_address_to_string (readbuf
),
1673 host_address_to_string (writebuf
),
1674 core_addr_to_string_nz (offset
),
1675 pulongest (len
), retval
,
1676 pulongest (*xfered_len
));
1682 if (retval
== TARGET_XFER_OK
&& myaddr
!= NULL
)
1686 fputs_unfiltered (", bytes =", gdb_stdlog
);
1687 for (i
= 0; i
< *xfered_len
; i
++)
1689 if ((((intptr_t) &(myaddr
[i
])) & 0xf) == 0)
1691 if (targetdebug
< 2 && i
> 0)
1693 fprintf_unfiltered (gdb_stdlog
, " ...");
1696 fprintf_unfiltered (gdb_stdlog
, "\n");
1699 fprintf_unfiltered (gdb_stdlog
, " %02x", myaddr
[i
] & 0xff);
1703 fputc_unfiltered ('\n', gdb_stdlog
);
1706 /* Check implementations of to_xfer_partial update *XFERED_LEN
1707 properly. Do assertion after printing debug messages, so that we
1708 can find more clues on assertion failure from debugging messages. */
1709 if (retval
== TARGET_XFER_OK
|| retval
== TARGET_XFER_E_UNAVAILABLE
)
1710 gdb_assert (*xfered_len
> 0);
1715 /* Read LEN bytes of target memory at address MEMADDR, placing the
1716 results in GDB's memory at MYADDR. Returns either 0 for success or
1717 TARGET_XFER_E_IO if any error occurs.
1719 If an error occurs, no guarantee is made about the contents of the data at
1720 MYADDR. In particular, the caller should not depend upon partial reads
1721 filling the buffer with good data. There is no way for the caller to know
1722 how much good data might have been transfered anyway. Callers that can
1723 deal with partial reads should call target_read (which will retry until
1724 it makes no progress, and then return how much was transferred). */
1727 target_read_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1729 /* Dispatch to the topmost target, not the flattened current_target.
1730 Memory accesses check target->to_has_(all_)memory, and the
1731 flattened target doesn't inherit those. */
1732 if (target_read (current_target
.beneath
, TARGET_OBJECT_MEMORY
, NULL
,
1733 myaddr
, memaddr
, len
) == len
)
1736 return TARGET_XFER_E_IO
;
1739 /* Like target_read_memory, but specify explicitly that this is a read
1740 from the target's raw memory. That is, this read bypasses the
1741 dcache, breakpoint shadowing, etc. */
1744 target_read_raw_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1746 /* See comment in target_read_memory about why the request starts at
1747 current_target.beneath. */
1748 if (target_read (current_target
.beneath
, TARGET_OBJECT_RAW_MEMORY
, NULL
,
1749 myaddr
, memaddr
, len
) == len
)
1752 return TARGET_XFER_E_IO
;
1755 /* Like target_read_memory, but specify explicitly that this is a read from
1756 the target's stack. This may trigger different cache behavior. */
1759 target_read_stack (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1761 /* See comment in target_read_memory about why the request starts at
1762 current_target.beneath. */
1763 if (target_read (current_target
.beneath
, TARGET_OBJECT_STACK_MEMORY
, NULL
,
1764 myaddr
, memaddr
, len
) == len
)
1767 return TARGET_XFER_E_IO
;
1770 /* Like target_read_memory, but specify explicitly that this is a read from
1771 the target's code. This may trigger different cache behavior. */
1774 target_read_code (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1776 /* See comment in target_read_memory about why the request starts at
1777 current_target.beneath. */
1778 if (target_read (current_target
.beneath
, TARGET_OBJECT_CODE_MEMORY
, NULL
,
1779 myaddr
, memaddr
, len
) == len
)
1782 return TARGET_XFER_E_IO
;
1785 /* Write LEN bytes from MYADDR to target memory at address MEMADDR.
1786 Returns either 0 for success or TARGET_XFER_E_IO if any
1787 error occurs. If an error occurs, no guarantee is made about how
1788 much data got written. Callers that can deal with partial writes
1789 should call target_write. */
1792 target_write_memory (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ssize_t len
)
1794 /* See comment in target_read_memory about why the request starts at
1795 current_target.beneath. */
1796 if (target_write (current_target
.beneath
, TARGET_OBJECT_MEMORY
, NULL
,
1797 myaddr
, memaddr
, len
) == len
)
1800 return TARGET_XFER_E_IO
;
1803 /* Write LEN bytes from MYADDR to target raw memory at address
1804 MEMADDR. Returns either 0 for success or TARGET_XFER_E_IO
1805 if any error occurs. If an error occurs, no guarantee is made
1806 about how much data got written. Callers that can deal with
1807 partial writes should call target_write. */
1810 target_write_raw_memory (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ssize_t len
)
1812 /* See comment in target_read_memory about why the request starts at
1813 current_target.beneath. */
1814 if (target_write (current_target
.beneath
, TARGET_OBJECT_RAW_MEMORY
, NULL
,
1815 myaddr
, memaddr
, len
) == len
)
1818 return TARGET_XFER_E_IO
;
1821 /* Fetch the target's memory map. */
1824 target_memory_map (void)
1826 VEC(mem_region_s
) *result
;
1827 struct mem_region
*last_one
, *this_one
;
1829 struct target_ops
*t
;
1832 fprintf_unfiltered (gdb_stdlog
, "target_memory_map ()\n");
1834 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
1835 if (t
->to_memory_map
!= NULL
)
1841 result
= t
->to_memory_map (t
);
1845 qsort (VEC_address (mem_region_s
, result
),
1846 VEC_length (mem_region_s
, result
),
1847 sizeof (struct mem_region
), mem_region_cmp
);
1849 /* Check that regions do not overlap. Simultaneously assign
1850 a numbering for the "mem" commands to use to refer to
1853 for (ix
= 0; VEC_iterate (mem_region_s
, result
, ix
, this_one
); ix
++)
1855 this_one
->number
= ix
;
1857 if (last_one
&& last_one
->hi
> this_one
->lo
)
1859 warning (_("Overlapping regions in memory map: ignoring"));
1860 VEC_free (mem_region_s
, result
);
1863 last_one
= this_one
;
1870 target_flash_erase (ULONGEST address
, LONGEST length
)
1872 struct target_ops
*t
;
1874 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
1875 if (t
->to_flash_erase
!= NULL
)
1878 fprintf_unfiltered (gdb_stdlog
, "target_flash_erase (%s, %s)\n",
1879 hex_string (address
), phex (length
, 0));
1880 t
->to_flash_erase (t
, address
, length
);
1888 target_flash_done (void)
1890 struct target_ops
*t
;
1892 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
1893 if (t
->to_flash_done
!= NULL
)
1896 fprintf_unfiltered (gdb_stdlog
, "target_flash_done\n");
1897 t
->to_flash_done (t
);
1905 show_trust_readonly (struct ui_file
*file
, int from_tty
,
1906 struct cmd_list_element
*c
, const char *value
)
1908 fprintf_filtered (file
,
1909 _("Mode for reading from readonly sections is %s.\n"),
1913 /* More generic transfers. */
1915 static enum target_xfer_status
1916 default_xfer_partial (struct target_ops
*ops
, enum target_object object
,
1917 const char *annex
, gdb_byte
*readbuf
,
1918 const gdb_byte
*writebuf
, ULONGEST offset
, ULONGEST len
,
1919 ULONGEST
*xfered_len
)
1921 if (object
== TARGET_OBJECT_MEMORY
1922 && ops
->deprecated_xfer_memory
!= NULL
)
1923 /* If available, fall back to the target's
1924 "deprecated_xfer_memory" method. */
1929 if (writebuf
!= NULL
)
1931 void *buffer
= xmalloc (len
);
1932 struct cleanup
*cleanup
= make_cleanup (xfree
, buffer
);
1934 memcpy (buffer
, writebuf
, len
);
1935 xfered
= ops
->deprecated_xfer_memory (offset
, buffer
, len
,
1936 1/*write*/, NULL
, ops
);
1937 do_cleanups (cleanup
);
1939 if (readbuf
!= NULL
)
1940 xfered
= ops
->deprecated_xfer_memory (offset
, readbuf
, len
,
1941 0/*read*/, NULL
, ops
);
1944 *xfered_len
= (ULONGEST
) xfered
;
1945 return TARGET_XFER_E_IO
;
1947 else if (xfered
== 0 && errno
== 0)
1948 /* "deprecated_xfer_memory" uses 0, cross checked against
1949 ERRNO as one indication of an error. */
1950 return TARGET_XFER_EOF
;
1952 return TARGET_XFER_E_IO
;
1956 gdb_assert (ops
->beneath
!= NULL
);
1957 return ops
->beneath
->to_xfer_partial (ops
->beneath
, object
, annex
,
1958 readbuf
, writebuf
, offset
, len
,
1963 /* Target vector read/write partial wrapper functions. */
1965 static enum target_xfer_status
1966 target_read_partial (struct target_ops
*ops
,
1967 enum target_object object
,
1968 const char *annex
, gdb_byte
*buf
,
1969 ULONGEST offset
, ULONGEST len
,
1970 ULONGEST
*xfered_len
)
1972 return target_xfer_partial (ops
, object
, annex
, buf
, NULL
, offset
, len
,
1976 static enum target_xfer_status
1977 target_write_partial (struct target_ops
*ops
,
1978 enum target_object object
,
1979 const char *annex
, const gdb_byte
*buf
,
1980 ULONGEST offset
, LONGEST len
, ULONGEST
*xfered_len
)
1982 return target_xfer_partial (ops
, object
, annex
, NULL
, buf
, offset
, len
,
1986 /* Wrappers to perform the full transfer. */
1988 /* For docs on target_read see target.h. */
1991 target_read (struct target_ops
*ops
,
1992 enum target_object object
,
1993 const char *annex
, gdb_byte
*buf
,
1994 ULONGEST offset
, LONGEST len
)
1998 while (xfered
< len
)
2000 ULONGEST xfered_len
;
2001 enum target_xfer_status status
;
2003 status
= target_read_partial (ops
, object
, annex
,
2004 (gdb_byte
*) buf
+ xfered
,
2005 offset
+ xfered
, len
- xfered
,
2008 /* Call an observer, notifying them of the xfer progress? */
2009 if (status
== TARGET_XFER_EOF
)
2011 else if (status
== TARGET_XFER_OK
)
2013 xfered
+= xfered_len
;
2023 /* Assuming that the entire [begin, end) range of memory cannot be
2024 read, try to read whatever subrange is possible to read.
2026 The function returns, in RESULT, either zero or one memory block.
2027 If there's a readable subrange at the beginning, it is completely
2028 read and returned. Any further readable subrange will not be read.
2029 Otherwise, if there's a readable subrange at the end, it will be
2030 completely read and returned. Any readable subranges before it
2031 (obviously, not starting at the beginning), will be ignored. In
2032 other cases -- either no readable subrange, or readable subrange(s)
2033 that is neither at the beginning, or end, nothing is returned.
2035 The purpose of this function is to handle a read across a boundary
2036 of accessible memory in a case when memory map is not available.
2037 The above restrictions are fine for this case, but will give
2038 incorrect results if the memory is 'patchy'. However, supporting
2039 'patchy' memory would require trying to read every single byte,
2040 and it seems unacceptable solution. Explicit memory map is
2041 recommended for this case -- and target_read_memory_robust will
2042 take care of reading multiple ranges then. */
2045 read_whatever_is_readable (struct target_ops
*ops
,
2046 ULONGEST begin
, ULONGEST end
,
2047 VEC(memory_read_result_s
) **result
)
2049 gdb_byte
*buf
= xmalloc (end
- begin
);
2050 ULONGEST current_begin
= begin
;
2051 ULONGEST current_end
= end
;
2053 memory_read_result_s r
;
2054 ULONGEST xfered_len
;
2056 /* If we previously failed to read 1 byte, nothing can be done here. */
2057 if (end
- begin
<= 1)
2063 /* Check that either first or the last byte is readable, and give up
2064 if not. This heuristic is meant to permit reading accessible memory
2065 at the boundary of accessible region. */
2066 if (target_read_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2067 buf
, begin
, 1, &xfered_len
) == TARGET_XFER_OK
)
2072 else if (target_read_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2073 buf
+ (end
-begin
) - 1, end
- 1, 1,
2074 &xfered_len
) == TARGET_XFER_OK
)
2085 /* Loop invariant is that the [current_begin, current_end) was previously
2086 found to be not readable as a whole.
2088 Note loop condition -- if the range has 1 byte, we can't divide the range
2089 so there's no point trying further. */
2090 while (current_end
- current_begin
> 1)
2092 ULONGEST first_half_begin
, first_half_end
;
2093 ULONGEST second_half_begin
, second_half_end
;
2095 ULONGEST middle
= current_begin
+ (current_end
- current_begin
)/2;
2099 first_half_begin
= current_begin
;
2100 first_half_end
= middle
;
2101 second_half_begin
= middle
;
2102 second_half_end
= current_end
;
2106 first_half_begin
= middle
;
2107 first_half_end
= current_end
;
2108 second_half_begin
= current_begin
;
2109 second_half_end
= middle
;
2112 xfer
= target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2113 buf
+ (first_half_begin
- begin
),
2115 first_half_end
- first_half_begin
);
2117 if (xfer
== first_half_end
- first_half_begin
)
2119 /* This half reads up fine. So, the error must be in the
2121 current_begin
= second_half_begin
;
2122 current_end
= second_half_end
;
2126 /* This half is not readable. Because we've tried one byte, we
2127 know some part of this half if actually redable. Go to the next
2128 iteration to divide again and try to read.
2130 We don't handle the other half, because this function only tries
2131 to read a single readable subrange. */
2132 current_begin
= first_half_begin
;
2133 current_end
= first_half_end
;
2139 /* The [begin, current_begin) range has been read. */
2141 r
.end
= current_begin
;
2146 /* The [current_end, end) range has been read. */
2147 LONGEST rlen
= end
- current_end
;
2149 r
.data
= xmalloc (rlen
);
2150 memcpy (r
.data
, buf
+ current_end
- begin
, rlen
);
2151 r
.begin
= current_end
;
2155 VEC_safe_push(memory_read_result_s
, (*result
), &r
);
2159 free_memory_read_result_vector (void *x
)
2161 VEC(memory_read_result_s
) *v
= x
;
2162 memory_read_result_s
*current
;
2165 for (ix
= 0; VEC_iterate (memory_read_result_s
, v
, ix
, current
); ++ix
)
2167 xfree (current
->data
);
2169 VEC_free (memory_read_result_s
, v
);
2172 VEC(memory_read_result_s
) *
2173 read_memory_robust (struct target_ops
*ops
, ULONGEST offset
, LONGEST len
)
2175 VEC(memory_read_result_s
) *result
= 0;
2178 while (xfered
< len
)
2180 struct mem_region
*region
= lookup_mem_region (offset
+ xfered
);
2183 /* If there is no explicit region, a fake one should be created. */
2184 gdb_assert (region
);
2186 if (region
->hi
== 0)
2187 rlen
= len
- xfered
;
2189 rlen
= region
->hi
- offset
;
2191 if (region
->attrib
.mode
== MEM_NONE
|| region
->attrib
.mode
== MEM_WO
)
2193 /* Cannot read this region. Note that we can end up here only
2194 if the region is explicitly marked inaccessible, or
2195 'inaccessible-by-default' is in effect. */
2200 LONGEST to_read
= min (len
- xfered
, rlen
);
2201 gdb_byte
*buffer
= (gdb_byte
*)xmalloc (to_read
);
2203 LONGEST xfer
= target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2204 (gdb_byte
*) buffer
,
2205 offset
+ xfered
, to_read
);
2206 /* Call an observer, notifying them of the xfer progress? */
2209 /* Got an error reading full chunk. See if maybe we can read
2212 read_whatever_is_readable (ops
, offset
+ xfered
,
2213 offset
+ xfered
+ to_read
, &result
);
2218 struct memory_read_result r
;
2220 r
.begin
= offset
+ xfered
;
2221 r
.end
= r
.begin
+ xfer
;
2222 VEC_safe_push (memory_read_result_s
, result
, &r
);
2232 /* An alternative to target_write with progress callbacks. */
2235 target_write_with_progress (struct target_ops
*ops
,
2236 enum target_object object
,
2237 const char *annex
, const gdb_byte
*buf
,
2238 ULONGEST offset
, LONGEST len
,
2239 void (*progress
) (ULONGEST
, void *), void *baton
)
2243 /* Give the progress callback a chance to set up. */
2245 (*progress
) (0, baton
);
2247 while (xfered
< len
)
2249 ULONGEST xfered_len
;
2250 enum target_xfer_status status
;
2252 status
= target_write_partial (ops
, object
, annex
,
2253 (gdb_byte
*) buf
+ xfered
,
2254 offset
+ xfered
, len
- xfered
,
2257 if (status
== TARGET_XFER_EOF
)
2259 if (TARGET_XFER_STATUS_ERROR_P (status
))
2262 gdb_assert (status
== TARGET_XFER_OK
);
2264 (*progress
) (xfered_len
, baton
);
2266 xfered
+= xfered_len
;
2272 /* For docs on target_write see target.h. */
2275 target_write (struct target_ops
*ops
,
2276 enum target_object object
,
2277 const char *annex
, const gdb_byte
*buf
,
2278 ULONGEST offset
, LONGEST len
)
2280 return target_write_with_progress (ops
, object
, annex
, buf
, offset
, len
,
2284 /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return
2285 the size of the transferred data. PADDING additional bytes are
2286 available in *BUF_P. This is a helper function for
2287 target_read_alloc; see the declaration of that function for more
2291 target_read_alloc_1 (struct target_ops
*ops
, enum target_object object
,
2292 const char *annex
, gdb_byte
**buf_p
, int padding
)
2294 size_t buf_alloc
, buf_pos
;
2297 /* This function does not have a length parameter; it reads the
2298 entire OBJECT). Also, it doesn't support objects fetched partly
2299 from one target and partly from another (in a different stratum,
2300 e.g. a core file and an executable). Both reasons make it
2301 unsuitable for reading memory. */
2302 gdb_assert (object
!= TARGET_OBJECT_MEMORY
);
2304 /* Start by reading up to 4K at a time. The target will throttle
2305 this number down if necessary. */
2307 buf
= xmalloc (buf_alloc
);
2311 ULONGEST xfered_len
;
2312 enum target_xfer_status status
;
2314 status
= target_read_partial (ops
, object
, annex
, &buf
[buf_pos
],
2315 buf_pos
, buf_alloc
- buf_pos
- padding
,
2318 if (status
== TARGET_XFER_EOF
)
2320 /* Read all there was. */
2327 else if (status
!= TARGET_XFER_OK
)
2329 /* An error occurred. */
2331 return TARGET_XFER_E_IO
;
2334 buf_pos
+= xfered_len
;
2336 /* If the buffer is filling up, expand it. */
2337 if (buf_alloc
< buf_pos
* 2)
2340 buf
= xrealloc (buf
, buf_alloc
);
2347 /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return
2348 the size of the transferred data. See the declaration in "target.h"
2349 function for more information about the return value. */
2352 target_read_alloc (struct target_ops
*ops
, enum target_object object
,
2353 const char *annex
, gdb_byte
**buf_p
)
2355 return target_read_alloc_1 (ops
, object
, annex
, buf_p
, 0);
2358 /* Read OBJECT/ANNEX using OPS. The result is NUL-terminated and
2359 returned as a string, allocated using xmalloc. If an error occurs
2360 or the transfer is unsupported, NULL is returned. Empty objects
2361 are returned as allocated but empty strings. A warning is issued
2362 if the result contains any embedded NUL bytes. */
2365 target_read_stralloc (struct target_ops
*ops
, enum target_object object
,
2370 LONGEST i
, transferred
;
2372 transferred
= target_read_alloc_1 (ops
, object
, annex
, &buffer
, 1);
2373 bufstr
= (char *) buffer
;
2375 if (transferred
< 0)
2378 if (transferred
== 0)
2379 return xstrdup ("");
2381 bufstr
[transferred
] = 0;
2383 /* Check for embedded NUL bytes; but allow trailing NULs. */
2384 for (i
= strlen (bufstr
); i
< transferred
; i
++)
2387 warning (_("target object %d, annex %s, "
2388 "contained unexpected null characters"),
2389 (int) object
, annex
? annex
: "(none)");
2396 /* Memory transfer methods. */
2399 get_target_memory (struct target_ops
*ops
, CORE_ADDR addr
, gdb_byte
*buf
,
2402 /* This method is used to read from an alternate, non-current
2403 target. This read must bypass the overlay support (as symbols
2404 don't match this target), and GDB's internal cache (wrong cache
2405 for this target). */
2406 if (target_read (ops
, TARGET_OBJECT_RAW_MEMORY
, NULL
, buf
, addr
, len
)
2408 memory_error (TARGET_XFER_E_IO
, addr
);
2412 get_target_memory_unsigned (struct target_ops
*ops
, CORE_ADDR addr
,
2413 int len
, enum bfd_endian byte_order
)
2415 gdb_byte buf
[sizeof (ULONGEST
)];
2417 gdb_assert (len
<= sizeof (buf
));
2418 get_target_memory (ops
, addr
, buf
, len
);
2419 return extract_unsigned_integer (buf
, len
, byte_order
);
2425 target_insert_breakpoint (struct gdbarch
*gdbarch
,
2426 struct bp_target_info
*bp_tgt
)
2428 if (!may_insert_breakpoints
)
2430 warning (_("May not insert breakpoints"));
2434 return current_target
.to_insert_breakpoint (¤t_target
,
2441 target_remove_breakpoint (struct gdbarch
*gdbarch
,
2442 struct bp_target_info
*bp_tgt
)
2444 /* This is kind of a weird case to handle, but the permission might
2445 have been changed after breakpoints were inserted - in which case
2446 we should just take the user literally and assume that any
2447 breakpoints should be left in place. */
2448 if (!may_insert_breakpoints
)
2450 warning (_("May not remove breakpoints"));
2454 return current_target
.to_remove_breakpoint (¤t_target
,
2459 target_info (char *args
, int from_tty
)
2461 struct target_ops
*t
;
2462 int has_all_mem
= 0;
2464 if (symfile_objfile
!= NULL
)
2465 printf_unfiltered (_("Symbols from \"%s\".\n"),
2466 objfile_name (symfile_objfile
));
2468 for (t
= target_stack
; t
!= NULL
; t
= t
->beneath
)
2470 if (!(*t
->to_has_memory
) (t
))
2473 if ((int) (t
->to_stratum
) <= (int) dummy_stratum
)
2476 printf_unfiltered (_("\tWhile running this, "
2477 "GDB does not access memory from...\n"));
2478 printf_unfiltered ("%s:\n", t
->to_longname
);
2479 (t
->to_files_info
) (t
);
2480 has_all_mem
= (*t
->to_has_all_memory
) (t
);
2484 /* This function is called before any new inferior is created, e.g.
2485 by running a program, attaching, or connecting to a target.
2486 It cleans up any state from previous invocations which might
2487 change between runs. This is a subset of what target_preopen
2488 resets (things which might change between targets). */
2491 target_pre_inferior (int from_tty
)
2493 /* Clear out solib state. Otherwise the solib state of the previous
2494 inferior might have survived and is entirely wrong for the new
2495 target. This has been observed on GNU/Linux using glibc 2.3. How
2507 Cannot access memory at address 0xdeadbeef
2510 /* In some OSs, the shared library list is the same/global/shared
2511 across inferiors. If code is shared between processes, so are
2512 memory regions and features. */
2513 if (!gdbarch_has_global_solist (target_gdbarch ()))
2515 no_shared_libraries (NULL
, from_tty
);
2517 invalidate_target_mem_regions ();
2519 target_clear_description ();
2522 agent_capability_invalidate ();
2525 /* Callback for iterate_over_inferiors. Gets rid of the given
2529 dispose_inferior (struct inferior
*inf
, void *args
)
2531 struct thread_info
*thread
;
2533 thread
= any_thread_of_process (inf
->pid
);
2536 switch_to_thread (thread
->ptid
);
2538 /* Core inferiors actually should be detached, not killed. */
2539 if (target_has_execution
)
2542 target_detach (NULL
, 0);
2548 /* This is to be called by the open routine before it does
2552 target_preopen (int from_tty
)
2556 if (have_inferiors ())
2559 || !have_live_inferiors ()
2560 || query (_("A program is being debugged already. Kill it? ")))
2561 iterate_over_inferiors (dispose_inferior
, NULL
);
2563 error (_("Program not killed."));
2566 /* Calling target_kill may remove the target from the stack. But if
2567 it doesn't (which seems like a win for UDI), remove it now. */
2568 /* Leave the exec target, though. The user may be switching from a
2569 live process to a core of the same program. */
2570 pop_all_targets_above (file_stratum
);
2572 target_pre_inferior (from_tty
);
2575 /* Detach a target after doing deferred register stores. */
2578 target_detach (const char *args
, int from_tty
)
2580 struct target_ops
* t
;
2582 if (gdbarch_has_global_breakpoints (target_gdbarch ()))
2583 /* Don't remove global breakpoints here. They're removed on
2584 disconnection from the target. */
2587 /* If we're in breakpoints-always-inserted mode, have to remove
2588 them before detaching. */
2589 remove_breakpoints_pid (ptid_get_pid (inferior_ptid
));
2591 prepare_for_detach ();
2593 current_target
.to_detach (¤t_target
, args
, from_tty
);
2595 fprintf_unfiltered (gdb_stdlog
, "target_detach (%s, %d)\n",
2600 target_disconnect (char *args
, int from_tty
)
2602 struct target_ops
*t
;
2604 /* If we're in breakpoints-always-inserted mode or if breakpoints
2605 are global across processes, we have to remove them before
2607 remove_breakpoints ();
2609 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2610 if (t
->to_disconnect
!= NULL
)
2613 fprintf_unfiltered (gdb_stdlog
, "target_disconnect (%s, %d)\n",
2615 t
->to_disconnect (t
, args
, from_tty
);
2623 target_wait (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
2625 struct target_ops
*t
;
2626 ptid_t retval
= (current_target
.to_wait
) (¤t_target
, ptid
,
2631 char *status_string
;
2632 char *options_string
;
2634 status_string
= target_waitstatus_to_string (status
);
2635 options_string
= target_options_to_string (options
);
2636 fprintf_unfiltered (gdb_stdlog
,
2637 "target_wait (%d, status, options={%s})"
2639 ptid_get_pid (ptid
), options_string
,
2640 ptid_get_pid (retval
), status_string
);
2641 xfree (status_string
);
2642 xfree (options_string
);
2649 target_pid_to_str (ptid_t ptid
)
2651 struct target_ops
*t
;
2653 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2655 if (t
->to_pid_to_str
!= NULL
)
2656 return (*t
->to_pid_to_str
) (t
, ptid
);
2659 return normal_pid_to_str (ptid
);
2663 target_thread_name (struct thread_info
*info
)
2665 return current_target
.to_thread_name (¤t_target
, info
);
2669 target_resume (ptid_t ptid
, int step
, enum gdb_signal signal
)
2671 struct target_ops
*t
;
2673 target_dcache_invalidate ();
2675 current_target
.to_resume (¤t_target
, ptid
, step
, signal
);
2677 fprintf_unfiltered (gdb_stdlog
, "target_resume (%d, %s, %s)\n",
2678 ptid_get_pid (ptid
),
2679 step
? "step" : "continue",
2680 gdb_signal_to_name (signal
));
2682 registers_changed_ptid (ptid
);
2683 set_executing (ptid
, 1);
2684 set_running (ptid
, 1);
2685 clear_inline_frame_state (ptid
);
2689 target_pass_signals (int numsigs
, unsigned char *pass_signals
)
2691 struct target_ops
*t
;
2693 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2695 if (t
->to_pass_signals
!= NULL
)
2701 fprintf_unfiltered (gdb_stdlog
, "target_pass_signals (%d, {",
2704 for (i
= 0; i
< numsigs
; i
++)
2705 if (pass_signals
[i
])
2706 fprintf_unfiltered (gdb_stdlog
, " %s",
2707 gdb_signal_to_name (i
));
2709 fprintf_unfiltered (gdb_stdlog
, " })\n");
2712 (*t
->to_pass_signals
) (t
, numsigs
, pass_signals
);
2719 target_program_signals (int numsigs
, unsigned char *program_signals
)
2721 struct target_ops
*t
;
2723 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2725 if (t
->to_program_signals
!= NULL
)
2731 fprintf_unfiltered (gdb_stdlog
, "target_program_signals (%d, {",
2734 for (i
= 0; i
< numsigs
; i
++)
2735 if (program_signals
[i
])
2736 fprintf_unfiltered (gdb_stdlog
, " %s",
2737 gdb_signal_to_name (i
));
2739 fprintf_unfiltered (gdb_stdlog
, " })\n");
2742 (*t
->to_program_signals
) (t
, numsigs
, program_signals
);
2748 /* Look through the list of possible targets for a target that can
2752 target_follow_fork (int follow_child
, int detach_fork
)
2754 struct target_ops
*t
;
2756 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2758 if (t
->to_follow_fork
!= NULL
)
2760 int retval
= t
->to_follow_fork (t
, follow_child
, detach_fork
);
2763 fprintf_unfiltered (gdb_stdlog
,
2764 "target_follow_fork (%d, %d) = %d\n",
2765 follow_child
, detach_fork
, retval
);
2770 /* Some target returned a fork event, but did not know how to follow it. */
2771 internal_error (__FILE__
, __LINE__
,
2772 _("could not find a target to follow fork"));
2776 target_mourn_inferior (void)
2778 struct target_ops
*t
;
2780 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2782 if (t
->to_mourn_inferior
!= NULL
)
2784 t
->to_mourn_inferior (t
);
2786 fprintf_unfiltered (gdb_stdlog
, "target_mourn_inferior ()\n");
2788 /* We no longer need to keep handles on any of the object files.
2789 Make sure to release them to avoid unnecessarily locking any
2790 of them while we're not actually debugging. */
2791 bfd_cache_close_all ();
2797 internal_error (__FILE__
, __LINE__
,
2798 _("could not find a target to follow mourn inferior"));
2801 /* Look for a target which can describe architectural features, starting
2802 from TARGET. If we find one, return its description. */
2804 const struct target_desc
*
2805 target_read_description (struct target_ops
*target
)
2807 struct target_ops
*t
;
2809 for (t
= target
; t
!= NULL
; t
= t
->beneath
)
2810 if (t
->to_read_description
!= NULL
)
2812 const struct target_desc
*tdesc
;
2814 tdesc
= t
->to_read_description (t
);
2822 /* The default implementation of to_search_memory.
2823 This implements a basic search of memory, reading target memory and
2824 performing the search here (as opposed to performing the search in on the
2825 target side with, for example, gdbserver). */
2828 simple_search_memory (struct target_ops
*ops
,
2829 CORE_ADDR start_addr
, ULONGEST search_space_len
,
2830 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2831 CORE_ADDR
*found_addrp
)
2833 /* NOTE: also defined in find.c testcase. */
2834 #define SEARCH_CHUNK_SIZE 16000
2835 const unsigned chunk_size
= SEARCH_CHUNK_SIZE
;
2836 /* Buffer to hold memory contents for searching. */
2837 gdb_byte
*search_buf
;
2838 unsigned search_buf_size
;
2839 struct cleanup
*old_cleanups
;
2841 search_buf_size
= chunk_size
+ pattern_len
- 1;
2843 /* No point in trying to allocate a buffer larger than the search space. */
2844 if (search_space_len
< search_buf_size
)
2845 search_buf_size
= search_space_len
;
2847 search_buf
= malloc (search_buf_size
);
2848 if (search_buf
== NULL
)
2849 error (_("Unable to allocate memory to perform the search."));
2850 old_cleanups
= make_cleanup (free_current_contents
, &search_buf
);
2852 /* Prime the search buffer. */
2854 if (target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2855 search_buf
, start_addr
, search_buf_size
) != search_buf_size
)
2857 warning (_("Unable to access %s bytes of target "
2858 "memory at %s, halting search."),
2859 pulongest (search_buf_size
), hex_string (start_addr
));
2860 do_cleanups (old_cleanups
);
2864 /* Perform the search.
2866 The loop is kept simple by allocating [N + pattern-length - 1] bytes.
2867 When we've scanned N bytes we copy the trailing bytes to the start and
2868 read in another N bytes. */
2870 while (search_space_len
>= pattern_len
)
2872 gdb_byte
*found_ptr
;
2873 unsigned nr_search_bytes
= min (search_space_len
, search_buf_size
);
2875 found_ptr
= memmem (search_buf
, nr_search_bytes
,
2876 pattern
, pattern_len
);
2878 if (found_ptr
!= NULL
)
2880 CORE_ADDR found_addr
= start_addr
+ (found_ptr
- search_buf
);
2882 *found_addrp
= found_addr
;
2883 do_cleanups (old_cleanups
);
2887 /* Not found in this chunk, skip to next chunk. */
2889 /* Don't let search_space_len wrap here, it's unsigned. */
2890 if (search_space_len
>= chunk_size
)
2891 search_space_len
-= chunk_size
;
2893 search_space_len
= 0;
2895 if (search_space_len
>= pattern_len
)
2897 unsigned keep_len
= search_buf_size
- chunk_size
;
2898 CORE_ADDR read_addr
= start_addr
+ chunk_size
+ keep_len
;
2901 /* Copy the trailing part of the previous iteration to the front
2902 of the buffer for the next iteration. */
2903 gdb_assert (keep_len
== pattern_len
- 1);
2904 memcpy (search_buf
, search_buf
+ chunk_size
, keep_len
);
2906 nr_to_read
= min (search_space_len
- keep_len
, chunk_size
);
2908 if (target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2909 search_buf
+ keep_len
, read_addr
,
2910 nr_to_read
) != nr_to_read
)
2912 warning (_("Unable to access %s bytes of target "
2913 "memory at %s, halting search."),
2914 plongest (nr_to_read
),
2915 hex_string (read_addr
));
2916 do_cleanups (old_cleanups
);
2920 start_addr
+= chunk_size
;
2926 do_cleanups (old_cleanups
);
2930 /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the
2931 sequence of bytes in PATTERN with length PATTERN_LEN.
2933 The result is 1 if found, 0 if not found, and -1 if there was an error
2934 requiring halting of the search (e.g. memory read error).
2935 If the pattern is found the address is recorded in FOUND_ADDRP. */
2938 target_search_memory (CORE_ADDR start_addr
, ULONGEST search_space_len
,
2939 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2940 CORE_ADDR
*found_addrp
)
2942 struct target_ops
*t
;
2945 /* We don't use INHERIT to set current_target.to_search_memory,
2946 so we have to scan the target stack and handle targetdebug
2950 fprintf_unfiltered (gdb_stdlog
, "target_search_memory (%s, ...)\n",
2951 hex_string (start_addr
));
2953 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2954 if (t
->to_search_memory
!= NULL
)
2959 found
= t
->to_search_memory (t
, start_addr
, search_space_len
,
2960 pattern
, pattern_len
, found_addrp
);
2964 /* If a special version of to_search_memory isn't available, use the
2966 found
= simple_search_memory (current_target
.beneath
,
2967 start_addr
, search_space_len
,
2968 pattern
, pattern_len
, found_addrp
);
2972 fprintf_unfiltered (gdb_stdlog
, " = %d\n", found
);
2977 /* Look through the currently pushed targets. If none of them will
2978 be able to restart the currently running process, issue an error
2982 target_require_runnable (void)
2984 struct target_ops
*t
;
2986 for (t
= target_stack
; t
!= NULL
; t
= t
->beneath
)
2988 /* If this target knows how to create a new program, then
2989 assume we will still be able to after killing the current
2990 one. Either killing and mourning will not pop T, or else
2991 find_default_run_target will find it again. */
2992 if (t
->to_create_inferior
!= NULL
)
2995 /* Do not worry about thread_stratum targets that can not
2996 create inferiors. Assume they will be pushed again if
2997 necessary, and continue to the process_stratum. */
2998 if (t
->to_stratum
== thread_stratum
2999 || t
->to_stratum
== arch_stratum
)
3002 error (_("The \"%s\" target does not support \"run\". "
3003 "Try \"help target\" or \"continue\"."),
3007 /* This function is only called if the target is running. In that
3008 case there should have been a process_stratum target and it
3009 should either know how to create inferiors, or not... */
3010 internal_error (__FILE__
, __LINE__
, _("No targets found"));
3013 /* Look through the list of possible targets for a target that can
3014 execute a run or attach command without any other data. This is
3015 used to locate the default process stratum.
3017 If DO_MESG is not NULL, the result is always valid (error() is
3018 called for errors); else, return NULL on error. */
3020 static struct target_ops
*
3021 find_default_run_target (char *do_mesg
)
3023 struct target_ops
**t
;
3024 struct target_ops
*runable
= NULL
;
3029 for (t
= target_structs
; t
< target_structs
+ target_struct_size
;
3032 if ((*t
)->to_can_run
&& target_can_run (*t
))
3042 error (_("Don't know how to %s. Try \"help target\"."), do_mesg
);
3051 find_default_attach (struct target_ops
*ops
, char *args
, int from_tty
)
3053 struct target_ops
*t
;
3055 t
= find_default_run_target ("attach");
3056 (t
->to_attach
) (t
, args
, from_tty
);
3061 find_default_create_inferior (struct target_ops
*ops
,
3062 char *exec_file
, char *allargs
, char **env
,
3065 struct target_ops
*t
;
3067 t
= find_default_run_target ("run");
3068 (t
->to_create_inferior
) (t
, exec_file
, allargs
, env
, from_tty
);
3073 find_default_can_async_p (struct target_ops
*ignore
)
3075 struct target_ops
*t
;
3077 /* This may be called before the target is pushed on the stack;
3078 look for the default process stratum. If there's none, gdb isn't
3079 configured with a native debugger, and target remote isn't
3081 t
= find_default_run_target (NULL
);
3082 if (t
&& t
->to_can_async_p
!= delegate_can_async_p
)
3083 return (t
->to_can_async_p
) (t
);
3088 find_default_is_async_p (struct target_ops
*ignore
)
3090 struct target_ops
*t
;
3092 /* This may be called before the target is pushed on the stack;
3093 look for the default process stratum. If there's none, gdb isn't
3094 configured with a native debugger, and target remote isn't
3096 t
= find_default_run_target (NULL
);
3097 if (t
&& t
->to_is_async_p
!= delegate_is_async_p
)
3098 return (t
->to_is_async_p
) (t
);
3103 find_default_supports_non_stop (struct target_ops
*self
)
3105 struct target_ops
*t
;
3107 t
= find_default_run_target (NULL
);
3108 if (t
&& t
->to_supports_non_stop
)
3109 return (t
->to_supports_non_stop
) (t
);
3114 target_supports_non_stop (void)
3116 struct target_ops
*t
;
3118 for (t
= ¤t_target
; t
!= NULL
; t
= t
->beneath
)
3119 if (t
->to_supports_non_stop
)
3120 return t
->to_supports_non_stop (t
);
3125 /* Implement the "info proc" command. */
3128 target_info_proc (char *args
, enum info_proc_what what
)
3130 struct target_ops
*t
;
3132 /* If we're already connected to something that can get us OS
3133 related data, use it. Otherwise, try using the native
3135 if (current_target
.to_stratum
>= process_stratum
)
3136 t
= current_target
.beneath
;
3138 t
= find_default_run_target (NULL
);
3140 for (; t
!= NULL
; t
= t
->beneath
)
3142 if (t
->to_info_proc
!= NULL
)
3144 t
->to_info_proc (t
, args
, what
);
3147 fprintf_unfiltered (gdb_stdlog
,
3148 "target_info_proc (\"%s\", %d)\n", args
, what
);
3158 find_default_supports_disable_randomization (struct target_ops
*self
)
3160 struct target_ops
*t
;
3162 t
= find_default_run_target (NULL
);
3163 if (t
&& t
->to_supports_disable_randomization
)
3164 return (t
->to_supports_disable_randomization
) (t
);
3169 target_supports_disable_randomization (void)
3171 struct target_ops
*t
;
3173 for (t
= ¤t_target
; t
!= NULL
; t
= t
->beneath
)
3174 if (t
->to_supports_disable_randomization
)
3175 return t
->to_supports_disable_randomization (t
);
3181 target_get_osdata (const char *type
)
3183 struct target_ops
*t
;
3185 /* If we're already connected to something that can get us OS
3186 related data, use it. Otherwise, try using the native
3188 if (current_target
.to_stratum
>= process_stratum
)
3189 t
= current_target
.beneath
;
3191 t
= find_default_run_target ("get OS data");
3196 return target_read_stralloc (t
, TARGET_OBJECT_OSDATA
, type
);
3199 /* Determine the current address space of thread PTID. */
3201 struct address_space
*
3202 target_thread_address_space (ptid_t ptid
)
3204 struct address_space
*aspace
;
3205 struct inferior
*inf
;
3206 struct target_ops
*t
;
3208 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3210 if (t
->to_thread_address_space
!= NULL
)
3212 aspace
= t
->to_thread_address_space (t
, ptid
);
3213 gdb_assert (aspace
);
3216 fprintf_unfiltered (gdb_stdlog
,
3217 "target_thread_address_space (%s) = %d\n",
3218 target_pid_to_str (ptid
),
3219 address_space_num (aspace
));
3224 /* Fall-back to the "main" address space of the inferior. */
3225 inf
= find_inferior_pid (ptid_get_pid (ptid
));
3227 if (inf
== NULL
|| inf
->aspace
== NULL
)
3228 internal_error (__FILE__
, __LINE__
,
3229 _("Can't determine the current "
3230 "address space of thread %s\n"),
3231 target_pid_to_str (ptid
));
3237 /* Target file operations. */
3239 static struct target_ops
*
3240 default_fileio_target (void)
3242 /* If we're already connected to something that can perform
3243 file I/O, use it. Otherwise, try using the native target. */
3244 if (current_target
.to_stratum
>= process_stratum
)
3245 return current_target
.beneath
;
3247 return find_default_run_target ("file I/O");
3250 /* Open FILENAME on the target, using FLAGS and MODE. Return a
3251 target file descriptor, or -1 if an error occurs (and set
3254 target_fileio_open (const char *filename
, int flags
, int mode
,
3257 struct target_ops
*t
;
3259 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
3261 if (t
->to_fileio_open
!= NULL
)
3263 int fd
= t
->to_fileio_open (t
, filename
, flags
, mode
, target_errno
);
3266 fprintf_unfiltered (gdb_stdlog
,
3267 "target_fileio_open (%s,0x%x,0%o) = %d (%d)\n",
3268 filename
, flags
, mode
,
3269 fd
, fd
!= -1 ? 0 : *target_errno
);
3274 *target_errno
= FILEIO_ENOSYS
;
3278 /* Write up to LEN bytes from WRITE_BUF to FD on the target.
3279 Return the number of bytes written, or -1 if an error occurs
3280 (and set *TARGET_ERRNO). */
3282 target_fileio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
3283 ULONGEST offset
, int *target_errno
)
3285 struct target_ops
*t
;
3287 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
3289 if (t
->to_fileio_pwrite
!= NULL
)
3291 int ret
= t
->to_fileio_pwrite (t
, fd
, write_buf
, len
, offset
,
3295 fprintf_unfiltered (gdb_stdlog
,
3296 "target_fileio_pwrite (%d,...,%d,%s) "
3298 fd
, len
, pulongest (offset
),
3299 ret
, ret
!= -1 ? 0 : *target_errno
);
3304 *target_errno
= FILEIO_ENOSYS
;
3308 /* Read up to LEN bytes FD on the target into READ_BUF.
3309 Return the number of bytes read, or -1 if an error occurs
3310 (and set *TARGET_ERRNO). */
3312 target_fileio_pread (int fd
, gdb_byte
*read_buf
, int len
,
3313 ULONGEST offset
, int *target_errno
)
3315 struct target_ops
*t
;
3317 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
3319 if (t
->to_fileio_pread
!= NULL
)
3321 int ret
= t
->to_fileio_pread (t
, fd
, read_buf
, len
, offset
,
3325 fprintf_unfiltered (gdb_stdlog
,
3326 "target_fileio_pread (%d,...,%d,%s) "
3328 fd
, len
, pulongest (offset
),
3329 ret
, ret
!= -1 ? 0 : *target_errno
);
3334 *target_errno
= FILEIO_ENOSYS
;
3338 /* Close FD on the target. Return 0, or -1 if an error occurs
3339 (and set *TARGET_ERRNO). */
3341 target_fileio_close (int fd
, int *target_errno
)
3343 struct target_ops
*t
;
3345 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
3347 if (t
->to_fileio_close
!= NULL
)
3349 int ret
= t
->to_fileio_close (t
, fd
, target_errno
);
3352 fprintf_unfiltered (gdb_stdlog
,
3353 "target_fileio_close (%d) = %d (%d)\n",
3354 fd
, ret
, ret
!= -1 ? 0 : *target_errno
);
3359 *target_errno
= FILEIO_ENOSYS
;
3363 /* Unlink FILENAME on the target. Return 0, or -1 if an error
3364 occurs (and set *TARGET_ERRNO). */
3366 target_fileio_unlink (const char *filename
, int *target_errno
)
3368 struct target_ops
*t
;
3370 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
3372 if (t
->to_fileio_unlink
!= NULL
)
3374 int ret
= t
->to_fileio_unlink (t
, filename
, target_errno
);
3377 fprintf_unfiltered (gdb_stdlog
,
3378 "target_fileio_unlink (%s) = %d (%d)\n",
3379 filename
, ret
, ret
!= -1 ? 0 : *target_errno
);
3384 *target_errno
= FILEIO_ENOSYS
;
3388 /* Read value of symbolic link FILENAME on the target. Return a
3389 null-terminated string allocated via xmalloc, or NULL if an error
3390 occurs (and set *TARGET_ERRNO). */
3392 target_fileio_readlink (const char *filename
, int *target_errno
)
3394 struct target_ops
*t
;
3396 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
3398 if (t
->to_fileio_readlink
!= NULL
)
3400 char *ret
= t
->to_fileio_readlink (t
, filename
, target_errno
);
3403 fprintf_unfiltered (gdb_stdlog
,
3404 "target_fileio_readlink (%s) = %s (%d)\n",
3405 filename
, ret
? ret
: "(nil)",
3406 ret
? 0 : *target_errno
);
3411 *target_errno
= FILEIO_ENOSYS
;
3416 target_fileio_close_cleanup (void *opaque
)
3418 int fd
= *(int *) opaque
;
3421 target_fileio_close (fd
, &target_errno
);
3424 /* Read target file FILENAME. Store the result in *BUF_P and
3425 return the size of the transferred data. PADDING additional bytes are
3426 available in *BUF_P. This is a helper function for
3427 target_fileio_read_alloc; see the declaration of that function for more
3431 target_fileio_read_alloc_1 (const char *filename
,
3432 gdb_byte
**buf_p
, int padding
)
3434 struct cleanup
*close_cleanup
;
3435 size_t buf_alloc
, buf_pos
;
3441 fd
= target_fileio_open (filename
, FILEIO_O_RDONLY
, 0700, &target_errno
);
3445 close_cleanup
= make_cleanup (target_fileio_close_cleanup
, &fd
);
3447 /* Start by reading up to 4K at a time. The target will throttle
3448 this number down if necessary. */
3450 buf
= xmalloc (buf_alloc
);
3454 n
= target_fileio_pread (fd
, &buf
[buf_pos
],
3455 buf_alloc
- buf_pos
- padding
, buf_pos
,
3459 /* An error occurred. */
3460 do_cleanups (close_cleanup
);
3466 /* Read all there was. */
3467 do_cleanups (close_cleanup
);
3477 /* If the buffer is filling up, expand it. */
3478 if (buf_alloc
< buf_pos
* 2)
3481 buf
= xrealloc (buf
, buf_alloc
);
3488 /* Read target file FILENAME. Store the result in *BUF_P and return
3489 the size of the transferred data. See the declaration in "target.h"
3490 function for more information about the return value. */
3493 target_fileio_read_alloc (const char *filename
, gdb_byte
**buf_p
)
3495 return target_fileio_read_alloc_1 (filename
, buf_p
, 0);
3498 /* Read target file FILENAME. The result is NUL-terminated and
3499 returned as a string, allocated using xmalloc. If an error occurs
3500 or the transfer is unsupported, NULL is returned. Empty objects
3501 are returned as allocated but empty strings. A warning is issued
3502 if the result contains any embedded NUL bytes. */
3505 target_fileio_read_stralloc (const char *filename
)
3509 LONGEST i
, transferred
;
3511 transferred
= target_fileio_read_alloc_1 (filename
, &buffer
, 1);
3512 bufstr
= (char *) buffer
;
3514 if (transferred
< 0)
3517 if (transferred
== 0)
3518 return xstrdup ("");
3520 bufstr
[transferred
] = 0;
3522 /* Check for embedded NUL bytes; but allow trailing NULs. */
3523 for (i
= strlen (bufstr
); i
< transferred
; i
++)
3526 warning (_("target file %s "
3527 "contained unexpected null characters"),
3537 default_region_ok_for_hw_watchpoint (struct target_ops
*self
,
3538 CORE_ADDR addr
, int len
)
3540 return (len
<= gdbarch_ptr_bit (target_gdbarch ()) / TARGET_CHAR_BIT
);
3544 default_watchpoint_addr_within_range (struct target_ops
*target
,
3546 CORE_ADDR start
, int length
)
3548 return addr
>= start
&& addr
< start
+ length
;
3551 static struct gdbarch
*
3552 default_thread_architecture (struct target_ops
*ops
, ptid_t ptid
)
3554 return target_gdbarch ();
3564 return_minus_one (void)
3576 * Find the next target down the stack from the specified target.
3580 find_target_beneath (struct target_ops
*t
)
3588 find_target_at (enum strata stratum
)
3590 struct target_ops
*t
;
3592 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3593 if (t
->to_stratum
== stratum
)
3600 /* The inferior process has died. Long live the inferior! */
3603 generic_mourn_inferior (void)
3607 ptid
= inferior_ptid
;
3608 inferior_ptid
= null_ptid
;
3610 /* Mark breakpoints uninserted in case something tries to delete a
3611 breakpoint while we delete the inferior's threads (which would
3612 fail, since the inferior is long gone). */
3613 mark_breakpoints_out ();
3615 if (!ptid_equal (ptid
, null_ptid
))
3617 int pid
= ptid_get_pid (ptid
);
3618 exit_inferior (pid
);
3621 /* Note this wipes step-resume breakpoints, so needs to be done
3622 after exit_inferior, which ends up referencing the step-resume
3623 breakpoints through clear_thread_inferior_resources. */
3624 breakpoint_init_inferior (inf_exited
);
3626 registers_changed ();
3628 reopen_exec_file ();
3629 reinit_frame_cache ();
3631 if (deprecated_detach_hook
)
3632 deprecated_detach_hook ();
3635 /* Convert a normal process ID to a string. Returns the string in a
3639 normal_pid_to_str (ptid_t ptid
)
3641 static char buf
[32];
3643 xsnprintf (buf
, sizeof buf
, "process %d", ptid_get_pid (ptid
));
3648 dummy_pid_to_str (struct target_ops
*ops
, ptid_t ptid
)
3650 return normal_pid_to_str (ptid
);
3653 /* Error-catcher for target_find_memory_regions. */
3655 dummy_find_memory_regions (struct target_ops
*self
,
3656 find_memory_region_ftype ignore1
, void *ignore2
)
3658 error (_("Command not implemented for this target."));
3662 /* Error-catcher for target_make_corefile_notes. */
3664 dummy_make_corefile_notes (struct target_ops
*self
,
3665 bfd
*ignore1
, int *ignore2
)
3667 error (_("Command not implemented for this target."));
3671 /* Set up the handful of non-empty slots needed by the dummy target
3675 init_dummy_target (void)
3677 dummy_target
.to_shortname
= "None";
3678 dummy_target
.to_longname
= "None";
3679 dummy_target
.to_doc
= "";
3680 dummy_target
.to_create_inferior
= find_default_create_inferior
;
3681 dummy_target
.to_supports_non_stop
= find_default_supports_non_stop
;
3682 dummy_target
.to_supports_disable_randomization
3683 = find_default_supports_disable_randomization
;
3684 dummy_target
.to_pid_to_str
= dummy_pid_to_str
;
3685 dummy_target
.to_stratum
= dummy_stratum
;
3686 dummy_target
.to_has_all_memory
= (int (*) (struct target_ops
*)) return_zero
;
3687 dummy_target
.to_has_memory
= (int (*) (struct target_ops
*)) return_zero
;
3688 dummy_target
.to_has_stack
= (int (*) (struct target_ops
*)) return_zero
;
3689 dummy_target
.to_has_registers
= (int (*) (struct target_ops
*)) return_zero
;
3690 dummy_target
.to_has_execution
3691 = (int (*) (struct target_ops
*, ptid_t
)) return_zero
;
3692 dummy_target
.to_magic
= OPS_MAGIC
;
3694 install_dummy_methods (&dummy_target
);
3698 debug_to_open (char *args
, int from_tty
)
3700 debug_target
.to_open (args
, from_tty
);
3702 fprintf_unfiltered (gdb_stdlog
, "target_open (%s, %d)\n", args
, from_tty
);
3706 target_close (struct target_ops
*targ
)
3708 gdb_assert (!target_is_pushed (targ
));
3710 if (targ
->to_xclose
!= NULL
)
3711 targ
->to_xclose (targ
);
3712 else if (targ
->to_close
!= NULL
)
3713 targ
->to_close (targ
);
3716 fprintf_unfiltered (gdb_stdlog
, "target_close ()\n");
3720 target_attach (char *args
, int from_tty
)
3722 current_target
.to_attach (¤t_target
, args
, from_tty
);
3724 fprintf_unfiltered (gdb_stdlog
, "target_attach (%s, %d)\n",
3729 target_thread_alive (ptid_t ptid
)
3731 struct target_ops
*t
;
3733 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3735 if (t
->to_thread_alive
!= NULL
)
3739 retval
= t
->to_thread_alive (t
, ptid
);
3741 fprintf_unfiltered (gdb_stdlog
, "target_thread_alive (%d) = %d\n",
3742 ptid_get_pid (ptid
), retval
);
3752 target_find_new_threads (void)
3754 struct target_ops
*t
;
3756 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3758 if (t
->to_find_new_threads
!= NULL
)
3760 t
->to_find_new_threads (t
);
3762 fprintf_unfiltered (gdb_stdlog
, "target_find_new_threads ()\n");
3770 target_stop (ptid_t ptid
)
3774 warning (_("May not interrupt or stop the target, ignoring attempt"));
3778 (*current_target
.to_stop
) (¤t_target
, ptid
);
3782 debug_to_post_attach (struct target_ops
*self
, int pid
)
3784 debug_target
.to_post_attach (&debug_target
, pid
);
3786 fprintf_unfiltered (gdb_stdlog
, "target_post_attach (%d)\n", pid
);
3789 /* Concatenate ELEM to LIST, a comma separate list, and return the
3790 result. The LIST incoming argument is released. */
3793 str_comma_list_concat_elem (char *list
, const char *elem
)
3796 return xstrdup (elem
);
3798 return reconcat (list
, list
, ", ", elem
, (char *) NULL
);
3801 /* Helper for target_options_to_string. If OPT is present in
3802 TARGET_OPTIONS, append the OPT_STR (string version of OPT) in RET.
3803 Returns the new resulting string. OPT is removed from
3807 do_option (int *target_options
, char *ret
,
3808 int opt
, char *opt_str
)
3810 if ((*target_options
& opt
) != 0)
3812 ret
= str_comma_list_concat_elem (ret
, opt_str
);
3813 *target_options
&= ~opt
;
3820 target_options_to_string (int target_options
)
3824 #define DO_TARG_OPTION(OPT) \
3825 ret = do_option (&target_options, ret, OPT, #OPT)
3827 DO_TARG_OPTION (TARGET_WNOHANG
);
3829 if (target_options
!= 0)
3830 ret
= str_comma_list_concat_elem (ret
, "unknown???");
3838 debug_print_register (const char * func
,
3839 struct regcache
*regcache
, int regno
)
3841 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
3843 fprintf_unfiltered (gdb_stdlog
, "%s ", func
);
3844 if (regno
>= 0 && regno
< gdbarch_num_regs (gdbarch
)
3845 && gdbarch_register_name (gdbarch
, regno
) != NULL
3846 && gdbarch_register_name (gdbarch
, regno
)[0] != '\0')
3847 fprintf_unfiltered (gdb_stdlog
, "(%s)",
3848 gdbarch_register_name (gdbarch
, regno
));
3850 fprintf_unfiltered (gdb_stdlog
, "(%d)", regno
);
3851 if (regno
>= 0 && regno
< gdbarch_num_regs (gdbarch
))
3853 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
3854 int i
, size
= register_size (gdbarch
, regno
);
3855 gdb_byte buf
[MAX_REGISTER_SIZE
];
3857 regcache_raw_collect (regcache
, regno
, buf
);
3858 fprintf_unfiltered (gdb_stdlog
, " = ");
3859 for (i
= 0; i
< size
; i
++)
3861 fprintf_unfiltered (gdb_stdlog
, "%02x", buf
[i
]);
3863 if (size
<= sizeof (LONGEST
))
3865 ULONGEST val
= extract_unsigned_integer (buf
, size
, byte_order
);
3867 fprintf_unfiltered (gdb_stdlog
, " %s %s",
3868 core_addr_to_string_nz (val
), plongest (val
));
3871 fprintf_unfiltered (gdb_stdlog
, "\n");
3875 target_fetch_registers (struct regcache
*regcache
, int regno
)
3877 struct target_ops
*t
;
3879 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3881 if (t
->to_fetch_registers
!= NULL
)
3883 t
->to_fetch_registers (t
, regcache
, regno
);
3885 debug_print_register ("target_fetch_registers", regcache
, regno
);
3892 target_store_registers (struct regcache
*regcache
, int regno
)
3894 struct target_ops
*t
;
3896 if (!may_write_registers
)
3897 error (_("Writing to registers is not allowed (regno %d)"), regno
);
3899 current_target
.to_store_registers (¤t_target
, regcache
, regno
);
3902 debug_print_register ("target_store_registers", regcache
, regno
);
3907 target_core_of_thread (ptid_t ptid
)
3909 struct target_ops
*t
;
3911 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3913 if (t
->to_core_of_thread
!= NULL
)
3915 int retval
= t
->to_core_of_thread (t
, ptid
);
3918 fprintf_unfiltered (gdb_stdlog
,
3919 "target_core_of_thread (%d) = %d\n",
3920 ptid_get_pid (ptid
), retval
);
3929 target_verify_memory (const gdb_byte
*data
, CORE_ADDR memaddr
, ULONGEST size
)
3931 struct target_ops
*t
;
3933 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3935 if (t
->to_verify_memory
!= NULL
)
3937 int retval
= t
->to_verify_memory (t
, data
, memaddr
, size
);
3940 fprintf_unfiltered (gdb_stdlog
,
3941 "target_verify_memory (%s, %s) = %d\n",
3942 paddress (target_gdbarch (), memaddr
),
3952 /* The documentation for this function is in its prototype declaration in
3956 target_insert_mask_watchpoint (CORE_ADDR addr
, CORE_ADDR mask
, int rw
)
3958 struct target_ops
*t
;
3960 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3961 if (t
->to_insert_mask_watchpoint
!= NULL
)
3965 ret
= t
->to_insert_mask_watchpoint (t
, addr
, mask
, rw
);
3968 fprintf_unfiltered (gdb_stdlog
, "\
3969 target_insert_mask_watchpoint (%s, %s, %d) = %d\n",
3970 core_addr_to_string (addr
),
3971 core_addr_to_string (mask
), rw
, ret
);
3979 /* The documentation for this function is in its prototype declaration in
3983 target_remove_mask_watchpoint (CORE_ADDR addr
, CORE_ADDR mask
, int rw
)
3985 struct target_ops
*t
;
3987 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3988 if (t
->to_remove_mask_watchpoint
!= NULL
)
3992 ret
= t
->to_remove_mask_watchpoint (t
, addr
, mask
, rw
);
3995 fprintf_unfiltered (gdb_stdlog
, "\
3996 target_remove_mask_watchpoint (%s, %s, %d) = %d\n",
3997 core_addr_to_string (addr
),
3998 core_addr_to_string (mask
), rw
, ret
);
4006 /* The documentation for this function is in its prototype declaration
4010 target_masked_watch_num_registers (CORE_ADDR addr
, CORE_ADDR mask
)
4012 struct target_ops
*t
;
4014 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4015 if (t
->to_masked_watch_num_registers
!= NULL
)
4016 return t
->to_masked_watch_num_registers (t
, addr
, mask
);
4021 /* The documentation for this function is in its prototype declaration
4025 target_ranged_break_num_registers (void)
4027 struct target_ops
*t
;
4029 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4030 if (t
->to_ranged_break_num_registers
!= NULL
)
4031 return t
->to_ranged_break_num_registers (t
);
4038 struct btrace_target_info
*
4039 target_enable_btrace (ptid_t ptid
)
4041 struct target_ops
*t
;
4043 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4044 if (t
->to_enable_btrace
!= NULL
)
4045 return t
->to_enable_btrace (t
, ptid
);
4054 target_disable_btrace (struct btrace_target_info
*btinfo
)
4056 struct target_ops
*t
;
4058 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4059 if (t
->to_disable_btrace
!= NULL
)
4061 t
->to_disable_btrace (t
, btinfo
);
4071 target_teardown_btrace (struct btrace_target_info
*btinfo
)
4073 struct target_ops
*t
;
4075 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4076 if (t
->to_teardown_btrace
!= NULL
)
4078 t
->to_teardown_btrace (t
, btinfo
);
4088 target_read_btrace (VEC (btrace_block_s
) **btrace
,
4089 struct btrace_target_info
*btinfo
,
4090 enum btrace_read_type type
)
4092 struct target_ops
*t
;
4094 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4095 if (t
->to_read_btrace
!= NULL
)
4096 return t
->to_read_btrace (t
, btrace
, btinfo
, type
);
4099 return BTRACE_ERR_NOT_SUPPORTED
;
4105 target_stop_recording (void)
4107 struct target_ops
*t
;
4109 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4110 if (t
->to_stop_recording
!= NULL
)
4112 t
->to_stop_recording (t
);
4116 /* This is optional. */
4122 target_info_record (void)
4124 struct target_ops
*t
;
4126 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4127 if (t
->to_info_record
!= NULL
)
4129 t
->to_info_record (t
);
4139 target_save_record (const char *filename
)
4141 struct target_ops
*t
;
4143 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4144 if (t
->to_save_record
!= NULL
)
4146 t
->to_save_record (t
, filename
);
4156 target_supports_delete_record (void)
4158 struct target_ops
*t
;
4160 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4161 if (t
->to_delete_record
!= NULL
)
4170 target_delete_record (void)
4172 struct target_ops
*t
;
4174 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4175 if (t
->to_delete_record
!= NULL
)
4177 t
->to_delete_record (t
);
4187 target_record_is_replaying (void)
4189 struct target_ops
*t
;
4191 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4192 if (t
->to_record_is_replaying
!= NULL
)
4193 return t
->to_record_is_replaying (t
);
4201 target_goto_record_begin (void)
4203 struct target_ops
*t
;
4205 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4206 if (t
->to_goto_record_begin
!= NULL
)
4208 t
->to_goto_record_begin (t
);
4218 target_goto_record_end (void)
4220 struct target_ops
*t
;
4222 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4223 if (t
->to_goto_record_end
!= NULL
)
4225 t
->to_goto_record_end (t
);
4235 target_goto_record (ULONGEST insn
)
4237 struct target_ops
*t
;
4239 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4240 if (t
->to_goto_record
!= NULL
)
4242 t
->to_goto_record (t
, insn
);
4252 target_insn_history (int size
, int flags
)
4254 struct target_ops
*t
;
4256 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4257 if (t
->to_insn_history
!= NULL
)
4259 t
->to_insn_history (t
, size
, flags
);
4269 target_insn_history_from (ULONGEST from
, int size
, int flags
)
4271 struct target_ops
*t
;
4273 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4274 if (t
->to_insn_history_from
!= NULL
)
4276 t
->to_insn_history_from (t
, from
, size
, flags
);
4286 target_insn_history_range (ULONGEST begin
, ULONGEST end
, int flags
)
4288 struct target_ops
*t
;
4290 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4291 if (t
->to_insn_history_range
!= NULL
)
4293 t
->to_insn_history_range (t
, begin
, end
, flags
);
4303 target_call_history (int size
, int flags
)
4305 struct target_ops
*t
;
4307 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4308 if (t
->to_call_history
!= NULL
)
4310 t
->to_call_history (t
, size
, flags
);
4320 target_call_history_from (ULONGEST begin
, int size
, int flags
)
4322 struct target_ops
*t
;
4324 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4325 if (t
->to_call_history_from
!= NULL
)
4327 t
->to_call_history_from (t
, begin
, size
, flags
);
4337 target_call_history_range (ULONGEST begin
, ULONGEST end
, int flags
)
4339 struct target_ops
*t
;
4341 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4342 if (t
->to_call_history_range
!= NULL
)
4344 t
->to_call_history_range (t
, begin
, end
, flags
);
4352 debug_to_prepare_to_store (struct target_ops
*self
, struct regcache
*regcache
)
4354 debug_target
.to_prepare_to_store (&debug_target
, regcache
);
4356 fprintf_unfiltered (gdb_stdlog
, "target_prepare_to_store ()\n");
4361 const struct frame_unwind
*
4362 target_get_unwinder (void)
4364 struct target_ops
*t
;
4366 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4367 if (t
->to_get_unwinder
!= NULL
)
4368 return t
->to_get_unwinder
;
4375 const struct frame_unwind
*
4376 target_get_tailcall_unwinder (void)
4378 struct target_ops
*t
;
4380 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4381 if (t
->to_get_tailcall_unwinder
!= NULL
)
4382 return t
->to_get_tailcall_unwinder
;
4390 forward_target_decr_pc_after_break (struct target_ops
*ops
,
4391 struct gdbarch
*gdbarch
)
4393 for (; ops
!= NULL
; ops
= ops
->beneath
)
4394 if (ops
->to_decr_pc_after_break
!= NULL
)
4395 return ops
->to_decr_pc_after_break (ops
, gdbarch
);
4397 return gdbarch_decr_pc_after_break (gdbarch
);
4403 target_decr_pc_after_break (struct gdbarch
*gdbarch
)
4405 return forward_target_decr_pc_after_break (current_target
.beneath
, gdbarch
);
4409 deprecated_debug_xfer_memory (CORE_ADDR memaddr
, bfd_byte
*myaddr
, int len
,
4410 int write
, struct mem_attrib
*attrib
,
4411 struct target_ops
*target
)
4415 retval
= debug_target
.deprecated_xfer_memory (memaddr
, myaddr
, len
, write
,
4418 fprintf_unfiltered (gdb_stdlog
,
4419 "target_xfer_memory (%s, xxx, %d, %s, xxx) = %d",
4420 paddress (target_gdbarch (), memaddr
), len
,
4421 write
? "write" : "read", retval
);
4427 fputs_unfiltered (", bytes =", gdb_stdlog
);
4428 for (i
= 0; i
< retval
; i
++)
4430 if ((((intptr_t) &(myaddr
[i
])) & 0xf) == 0)
4432 if (targetdebug
< 2 && i
> 0)
4434 fprintf_unfiltered (gdb_stdlog
, " ...");
4437 fprintf_unfiltered (gdb_stdlog
, "\n");
4440 fprintf_unfiltered (gdb_stdlog
, " %02x", myaddr
[i
] & 0xff);
4444 fputc_unfiltered ('\n', gdb_stdlog
);
4450 debug_to_files_info (struct target_ops
*target
)
4452 debug_target
.to_files_info (target
);
4454 fprintf_unfiltered (gdb_stdlog
, "target_files_info (xxx)\n");
4458 debug_to_insert_breakpoint (struct target_ops
*ops
, struct gdbarch
*gdbarch
,
4459 struct bp_target_info
*bp_tgt
)
4463 retval
= debug_target
.to_insert_breakpoint (&debug_target
, gdbarch
, bp_tgt
);
4465 fprintf_unfiltered (gdb_stdlog
,
4466 "target_insert_breakpoint (%s, xxx) = %ld\n",
4467 core_addr_to_string (bp_tgt
->placed_address
),
4468 (unsigned long) retval
);
4473 debug_to_remove_breakpoint (struct target_ops
*ops
, struct gdbarch
*gdbarch
,
4474 struct bp_target_info
*bp_tgt
)
4478 retval
= debug_target
.to_remove_breakpoint (&debug_target
, gdbarch
, bp_tgt
);
4480 fprintf_unfiltered (gdb_stdlog
,
4481 "target_remove_breakpoint (%s, xxx) = %ld\n",
4482 core_addr_to_string (bp_tgt
->placed_address
),
4483 (unsigned long) retval
);
4488 debug_to_can_use_hw_breakpoint (struct target_ops
*self
,
4489 int type
, int cnt
, int from_tty
)
4493 retval
= debug_target
.to_can_use_hw_breakpoint (&debug_target
,
4494 type
, cnt
, from_tty
);
4496 fprintf_unfiltered (gdb_stdlog
,
4497 "target_can_use_hw_breakpoint (%ld, %ld, %ld) = %ld\n",
4498 (unsigned long) type
,
4499 (unsigned long) cnt
,
4500 (unsigned long) from_tty
,
4501 (unsigned long) retval
);
4506 debug_to_region_ok_for_hw_watchpoint (struct target_ops
*self
,
4507 CORE_ADDR addr
, int len
)
4511 retval
= debug_target
.to_region_ok_for_hw_watchpoint (&debug_target
,
4514 fprintf_unfiltered (gdb_stdlog
,
4515 "target_region_ok_for_hw_watchpoint (%s, %ld) = %s\n",
4516 core_addr_to_string (addr
), (unsigned long) len
,
4517 core_addr_to_string (retval
));
4522 debug_to_can_accel_watchpoint_condition (struct target_ops
*self
,
4523 CORE_ADDR addr
, int len
, int rw
,
4524 struct expression
*cond
)
4528 retval
= debug_target
.to_can_accel_watchpoint_condition (&debug_target
,
4532 fprintf_unfiltered (gdb_stdlog
,
4533 "target_can_accel_watchpoint_condition "
4534 "(%s, %d, %d, %s) = %ld\n",
4535 core_addr_to_string (addr
), len
, rw
,
4536 host_address_to_string (cond
), (unsigned long) retval
);
4541 debug_to_stopped_by_watchpoint (struct target_ops
*ops
)
4545 retval
= debug_target
.to_stopped_by_watchpoint (&debug_target
);
4547 fprintf_unfiltered (gdb_stdlog
,
4548 "target_stopped_by_watchpoint () = %ld\n",
4549 (unsigned long) retval
);
4554 debug_to_stopped_data_address (struct target_ops
*target
, CORE_ADDR
*addr
)
4558 retval
= debug_target
.to_stopped_data_address (target
, addr
);
4560 fprintf_unfiltered (gdb_stdlog
,
4561 "target_stopped_data_address ([%s]) = %ld\n",
4562 core_addr_to_string (*addr
),
4563 (unsigned long)retval
);
4568 debug_to_watchpoint_addr_within_range (struct target_ops
*target
,
4570 CORE_ADDR start
, int length
)
4574 retval
= debug_target
.to_watchpoint_addr_within_range (target
, addr
,
4577 fprintf_filtered (gdb_stdlog
,
4578 "target_watchpoint_addr_within_range (%s, %s, %d) = %d\n",
4579 core_addr_to_string (addr
), core_addr_to_string (start
),
4585 debug_to_insert_hw_breakpoint (struct target_ops
*self
,
4586 struct gdbarch
*gdbarch
,
4587 struct bp_target_info
*bp_tgt
)
4591 retval
= debug_target
.to_insert_hw_breakpoint (&debug_target
,
4594 fprintf_unfiltered (gdb_stdlog
,
4595 "target_insert_hw_breakpoint (%s, xxx) = %ld\n",
4596 core_addr_to_string (bp_tgt
->placed_address
),
4597 (unsigned long) retval
);
4602 debug_to_remove_hw_breakpoint (struct target_ops
*self
,
4603 struct gdbarch
*gdbarch
,
4604 struct bp_target_info
*bp_tgt
)
4608 retval
= debug_target
.to_remove_hw_breakpoint (&debug_target
,
4611 fprintf_unfiltered (gdb_stdlog
,
4612 "target_remove_hw_breakpoint (%s, xxx) = %ld\n",
4613 core_addr_to_string (bp_tgt
->placed_address
),
4614 (unsigned long) retval
);
4619 debug_to_insert_watchpoint (struct target_ops
*self
,
4620 CORE_ADDR addr
, int len
, int type
,
4621 struct expression
*cond
)
4625 retval
= debug_target
.to_insert_watchpoint (&debug_target
,
4626 addr
, len
, type
, cond
);
4628 fprintf_unfiltered (gdb_stdlog
,
4629 "target_insert_watchpoint (%s, %d, %d, %s) = %ld\n",
4630 core_addr_to_string (addr
), len
, type
,
4631 host_address_to_string (cond
), (unsigned long) retval
);
4636 debug_to_remove_watchpoint (struct target_ops
*self
,
4637 CORE_ADDR addr
, int len
, int type
,
4638 struct expression
*cond
)
4642 retval
= debug_target
.to_remove_watchpoint (&debug_target
,
4643 addr
, len
, type
, cond
);
4645 fprintf_unfiltered (gdb_stdlog
,
4646 "target_remove_watchpoint (%s, %d, %d, %s) = %ld\n",
4647 core_addr_to_string (addr
), len
, type
,
4648 host_address_to_string (cond
), (unsigned long) retval
);
4653 debug_to_terminal_init (struct target_ops
*self
)
4655 debug_target
.to_terminal_init (&debug_target
);
4657 fprintf_unfiltered (gdb_stdlog
, "target_terminal_init ()\n");
4661 debug_to_terminal_inferior (struct target_ops
*self
)
4663 debug_target
.to_terminal_inferior (&debug_target
);
4665 fprintf_unfiltered (gdb_stdlog
, "target_terminal_inferior ()\n");
4669 debug_to_terminal_ours_for_output (struct target_ops
*self
)
4671 debug_target
.to_terminal_ours_for_output (&debug_target
);
4673 fprintf_unfiltered (gdb_stdlog
, "target_terminal_ours_for_output ()\n");
4677 debug_to_terminal_ours (struct target_ops
*self
)
4679 debug_target
.to_terminal_ours (&debug_target
);
4681 fprintf_unfiltered (gdb_stdlog
, "target_terminal_ours ()\n");
4685 debug_to_terminal_save_ours (struct target_ops
*self
)
4687 debug_target
.to_terminal_save_ours (&debug_target
);
4689 fprintf_unfiltered (gdb_stdlog
, "target_terminal_save_ours ()\n");
4693 debug_to_terminal_info (struct target_ops
*self
,
4694 const char *arg
, int from_tty
)
4696 debug_target
.to_terminal_info (&debug_target
, arg
, from_tty
);
4698 fprintf_unfiltered (gdb_stdlog
, "target_terminal_info (%s, %d)\n", arg
,
4703 debug_to_load (struct target_ops
*self
, char *args
, int from_tty
)
4705 debug_target
.to_load (&debug_target
, args
, from_tty
);
4707 fprintf_unfiltered (gdb_stdlog
, "target_load (%s, %d)\n", args
, from_tty
);
4711 debug_to_post_startup_inferior (struct target_ops
*self
, ptid_t ptid
)
4713 debug_target
.to_post_startup_inferior (&debug_target
, ptid
);
4715 fprintf_unfiltered (gdb_stdlog
, "target_post_startup_inferior (%d)\n",
4716 ptid_get_pid (ptid
));
4720 debug_to_insert_fork_catchpoint (struct target_ops
*self
, int pid
)
4724 retval
= debug_target
.to_insert_fork_catchpoint (&debug_target
, pid
);
4726 fprintf_unfiltered (gdb_stdlog
, "target_insert_fork_catchpoint (%d) = %d\n",
4733 debug_to_remove_fork_catchpoint (struct target_ops
*self
, int pid
)
4737 retval
= debug_target
.to_remove_fork_catchpoint (&debug_target
, pid
);
4739 fprintf_unfiltered (gdb_stdlog
, "target_remove_fork_catchpoint (%d) = %d\n",
4746 debug_to_insert_vfork_catchpoint (struct target_ops
*self
, int pid
)
4750 retval
= debug_target
.to_insert_vfork_catchpoint (&debug_target
, pid
);
4752 fprintf_unfiltered (gdb_stdlog
, "target_insert_vfork_catchpoint (%d) = %d\n",
4759 debug_to_remove_vfork_catchpoint (struct target_ops
*self
, int pid
)
4763 retval
= debug_target
.to_remove_vfork_catchpoint (&debug_target
, pid
);
4765 fprintf_unfiltered (gdb_stdlog
, "target_remove_vfork_catchpoint (%d) = %d\n",
4772 debug_to_insert_exec_catchpoint (struct target_ops
*self
, int pid
)
4776 retval
= debug_target
.to_insert_exec_catchpoint (&debug_target
, pid
);
4778 fprintf_unfiltered (gdb_stdlog
, "target_insert_exec_catchpoint (%d) = %d\n",
4785 debug_to_remove_exec_catchpoint (struct target_ops
*self
, int pid
)
4789 retval
= debug_target
.to_remove_exec_catchpoint (&debug_target
, pid
);
4791 fprintf_unfiltered (gdb_stdlog
, "target_remove_exec_catchpoint (%d) = %d\n",
4798 debug_to_has_exited (struct target_ops
*self
,
4799 int pid
, int wait_status
, int *exit_status
)
4803 has_exited
= debug_target
.to_has_exited (&debug_target
,
4804 pid
, wait_status
, exit_status
);
4806 fprintf_unfiltered (gdb_stdlog
, "target_has_exited (%d, %d, %d) = %d\n",
4807 pid
, wait_status
, *exit_status
, has_exited
);
4813 debug_to_can_run (struct target_ops
*self
)
4817 retval
= debug_target
.to_can_run (&debug_target
);
4819 fprintf_unfiltered (gdb_stdlog
, "target_can_run () = %d\n", retval
);
4824 static struct gdbarch
*
4825 debug_to_thread_architecture (struct target_ops
*ops
, ptid_t ptid
)
4827 struct gdbarch
*retval
;
4829 retval
= debug_target
.to_thread_architecture (ops
, ptid
);
4831 fprintf_unfiltered (gdb_stdlog
,
4832 "target_thread_architecture (%s) = %s [%s]\n",
4833 target_pid_to_str (ptid
),
4834 host_address_to_string (retval
),
4835 gdbarch_bfd_arch_info (retval
)->printable_name
);
4840 debug_to_stop (struct target_ops
*self
, ptid_t ptid
)
4842 debug_target
.to_stop (&debug_target
, ptid
);
4844 fprintf_unfiltered (gdb_stdlog
, "target_stop (%s)\n",
4845 target_pid_to_str (ptid
));
4849 debug_to_rcmd (struct target_ops
*self
, char *command
,
4850 struct ui_file
*outbuf
)
4852 debug_target
.to_rcmd (&debug_target
, command
, outbuf
);
4853 fprintf_unfiltered (gdb_stdlog
, "target_rcmd (%s, ...)\n", command
);
4857 debug_to_pid_to_exec_file (struct target_ops
*self
, int pid
)
4861 exec_file
= debug_target
.to_pid_to_exec_file (&debug_target
, pid
);
4863 fprintf_unfiltered (gdb_stdlog
, "target_pid_to_exec_file (%d) = %s\n",
4870 setup_target_debug (void)
4872 memcpy (&debug_target
, ¤t_target
, sizeof debug_target
);
4874 current_target
.to_open
= debug_to_open
;
4875 current_target
.to_post_attach
= debug_to_post_attach
;
4876 current_target
.to_prepare_to_store
= debug_to_prepare_to_store
;
4877 current_target
.deprecated_xfer_memory
= deprecated_debug_xfer_memory
;
4878 current_target
.to_files_info
= debug_to_files_info
;
4879 current_target
.to_insert_breakpoint
= debug_to_insert_breakpoint
;
4880 current_target
.to_remove_breakpoint
= debug_to_remove_breakpoint
;
4881 current_target
.to_can_use_hw_breakpoint
= debug_to_can_use_hw_breakpoint
;
4882 current_target
.to_insert_hw_breakpoint
= debug_to_insert_hw_breakpoint
;
4883 current_target
.to_remove_hw_breakpoint
= debug_to_remove_hw_breakpoint
;
4884 current_target
.to_insert_watchpoint
= debug_to_insert_watchpoint
;
4885 current_target
.to_remove_watchpoint
= debug_to_remove_watchpoint
;
4886 current_target
.to_stopped_by_watchpoint
= debug_to_stopped_by_watchpoint
;
4887 current_target
.to_stopped_data_address
= debug_to_stopped_data_address
;
4888 current_target
.to_watchpoint_addr_within_range
4889 = debug_to_watchpoint_addr_within_range
;
4890 current_target
.to_region_ok_for_hw_watchpoint
4891 = debug_to_region_ok_for_hw_watchpoint
;
4892 current_target
.to_can_accel_watchpoint_condition
4893 = debug_to_can_accel_watchpoint_condition
;
4894 current_target
.to_terminal_init
= debug_to_terminal_init
;
4895 current_target
.to_terminal_inferior
= debug_to_terminal_inferior
;
4896 current_target
.to_terminal_ours_for_output
4897 = debug_to_terminal_ours_for_output
;
4898 current_target
.to_terminal_ours
= debug_to_terminal_ours
;
4899 current_target
.to_terminal_save_ours
= debug_to_terminal_save_ours
;
4900 current_target
.to_terminal_info
= debug_to_terminal_info
;
4901 current_target
.to_load
= debug_to_load
;
4902 current_target
.to_post_startup_inferior
= debug_to_post_startup_inferior
;
4903 current_target
.to_insert_fork_catchpoint
= debug_to_insert_fork_catchpoint
;
4904 current_target
.to_remove_fork_catchpoint
= debug_to_remove_fork_catchpoint
;
4905 current_target
.to_insert_vfork_catchpoint
= debug_to_insert_vfork_catchpoint
;
4906 current_target
.to_remove_vfork_catchpoint
= debug_to_remove_vfork_catchpoint
;
4907 current_target
.to_insert_exec_catchpoint
= debug_to_insert_exec_catchpoint
;
4908 current_target
.to_remove_exec_catchpoint
= debug_to_remove_exec_catchpoint
;
4909 current_target
.to_has_exited
= debug_to_has_exited
;
4910 current_target
.to_can_run
= debug_to_can_run
;
4911 current_target
.to_stop
= debug_to_stop
;
4912 current_target
.to_rcmd
= debug_to_rcmd
;
4913 current_target
.to_pid_to_exec_file
= debug_to_pid_to_exec_file
;
4914 current_target
.to_thread_architecture
= debug_to_thread_architecture
;
4918 static char targ_desc
[] =
4919 "Names of targets and files being debugged.\nShows the entire \
4920 stack of targets currently in use (including the exec-file,\n\
4921 core-file, and process, if any), as well as the symbol file name.";
4924 default_rcmd (struct target_ops
*self
, char *command
, struct ui_file
*output
)
4926 error (_("\"monitor\" command not supported by this target."));
4930 do_monitor_command (char *cmd
,
4933 target_rcmd (cmd
, gdb_stdtarg
);
4936 /* Print the name of each layers of our target stack. */
4939 maintenance_print_target_stack (char *cmd
, int from_tty
)
4941 struct target_ops
*t
;
4943 printf_filtered (_("The current target stack is:\n"));
4945 for (t
= target_stack
; t
!= NULL
; t
= t
->beneath
)
4947 printf_filtered (" - %s (%s)\n", t
->to_shortname
, t
->to_longname
);
4951 /* Controls if async mode is permitted. */
4952 int target_async_permitted
= 0;
4954 /* The set command writes to this variable. If the inferior is
4955 executing, target_async_permitted is *not* updated. */
4956 static int target_async_permitted_1
= 0;
4959 set_target_async_command (char *args
, int from_tty
,
4960 struct cmd_list_element
*c
)
4962 if (have_live_inferiors ())
4964 target_async_permitted_1
= target_async_permitted
;
4965 error (_("Cannot change this setting while the inferior is running."));
4968 target_async_permitted
= target_async_permitted_1
;
4972 show_target_async_command (struct ui_file
*file
, int from_tty
,
4973 struct cmd_list_element
*c
,
4976 fprintf_filtered (file
,
4977 _("Controlling the inferior in "
4978 "asynchronous mode is %s.\n"), value
);
4981 /* Temporary copies of permission settings. */
4983 static int may_write_registers_1
= 1;
4984 static int may_write_memory_1
= 1;
4985 static int may_insert_breakpoints_1
= 1;
4986 static int may_insert_tracepoints_1
= 1;
4987 static int may_insert_fast_tracepoints_1
= 1;
4988 static int may_stop_1
= 1;
4990 /* Make the user-set values match the real values again. */
4993 update_target_permissions (void)
4995 may_write_registers_1
= may_write_registers
;
4996 may_write_memory_1
= may_write_memory
;
4997 may_insert_breakpoints_1
= may_insert_breakpoints
;
4998 may_insert_tracepoints_1
= may_insert_tracepoints
;
4999 may_insert_fast_tracepoints_1
= may_insert_fast_tracepoints
;
5000 may_stop_1
= may_stop
;
5003 /* The one function handles (most of) the permission flags in the same
5007 set_target_permissions (char *args
, int from_tty
,
5008 struct cmd_list_element
*c
)
5010 if (target_has_execution
)
5012 update_target_permissions ();
5013 error (_("Cannot change this setting while the inferior is running."));
5016 /* Make the real values match the user-changed values. */
5017 may_write_registers
= may_write_registers_1
;
5018 may_insert_breakpoints
= may_insert_breakpoints_1
;
5019 may_insert_tracepoints
= may_insert_tracepoints_1
;
5020 may_insert_fast_tracepoints
= may_insert_fast_tracepoints_1
;
5021 may_stop
= may_stop_1
;
5022 update_observer_mode ();
5025 /* Set memory write permission independently of observer mode. */
5028 set_write_memory_permission (char *args
, int from_tty
,
5029 struct cmd_list_element
*c
)
5031 /* Make the real values match the user-changed values. */
5032 may_write_memory
= may_write_memory_1
;
5033 update_observer_mode ();
5038 initialize_targets (void)
5040 init_dummy_target ();
5041 push_target (&dummy_target
);
5043 add_info ("target", target_info
, targ_desc
);
5044 add_info ("files", target_info
, targ_desc
);
5046 add_setshow_zuinteger_cmd ("target", class_maintenance
, &targetdebug
, _("\
5047 Set target debugging."), _("\
5048 Show target debugging."), _("\
5049 When non-zero, target debugging is enabled. Higher numbers are more\n\
5050 verbose. Changes do not take effect until the next \"run\" or \"target\"\n\
5054 &setdebuglist
, &showdebuglist
);
5056 add_setshow_boolean_cmd ("trust-readonly-sections", class_support
,
5057 &trust_readonly
, _("\
5058 Set mode for reading from readonly sections."), _("\
5059 Show mode for reading from readonly sections."), _("\
5060 When this mode is on, memory reads from readonly sections (such as .text)\n\
5061 will be read from the object file instead of from the target. This will\n\
5062 result in significant performance improvement for remote targets."),
5064 show_trust_readonly
,
5065 &setlist
, &showlist
);
5067 add_com ("monitor", class_obscure
, do_monitor_command
,
5068 _("Send a command to the remote monitor (remote targets only)."));
5070 add_cmd ("target-stack", class_maintenance
, maintenance_print_target_stack
,
5071 _("Print the name of each layer of the internal target stack."),
5072 &maintenanceprintlist
);
5074 add_setshow_boolean_cmd ("target-async", no_class
,
5075 &target_async_permitted_1
, _("\
5076 Set whether gdb controls the inferior in asynchronous mode."), _("\
5077 Show whether gdb controls the inferior in asynchronous mode."), _("\
5078 Tells gdb whether to control the inferior in asynchronous mode."),
5079 set_target_async_command
,
5080 show_target_async_command
,
5084 add_setshow_boolean_cmd ("may-write-registers", class_support
,
5085 &may_write_registers_1
, _("\
5086 Set permission to write into registers."), _("\
5087 Show permission to write into registers."), _("\
5088 When this permission is on, GDB may write into the target's registers.\n\
5089 Otherwise, any sort of write attempt will result in an error."),
5090 set_target_permissions
, NULL
,
5091 &setlist
, &showlist
);
5093 add_setshow_boolean_cmd ("may-write-memory", class_support
,
5094 &may_write_memory_1
, _("\
5095 Set permission to write into target memory."), _("\
5096 Show permission to write into target memory."), _("\
5097 When this permission is on, GDB may write into the target's memory.\n\
5098 Otherwise, any sort of write attempt will result in an error."),
5099 set_write_memory_permission
, NULL
,
5100 &setlist
, &showlist
);
5102 add_setshow_boolean_cmd ("may-insert-breakpoints", class_support
,
5103 &may_insert_breakpoints_1
, _("\
5104 Set permission to insert breakpoints in the target."), _("\
5105 Show permission to insert breakpoints in the target."), _("\
5106 When this permission is on, GDB may insert breakpoints in the program.\n\
5107 Otherwise, any sort of insertion attempt will result in an error."),
5108 set_target_permissions
, NULL
,
5109 &setlist
, &showlist
);
5111 add_setshow_boolean_cmd ("may-insert-tracepoints", class_support
,
5112 &may_insert_tracepoints_1
, _("\
5113 Set permission to insert tracepoints in the target."), _("\
5114 Show permission to insert tracepoints in the target."), _("\
5115 When this permission is on, GDB may insert tracepoints in the program.\n\
5116 Otherwise, any sort of insertion attempt will result in an error."),
5117 set_target_permissions
, NULL
,
5118 &setlist
, &showlist
);
5120 add_setshow_boolean_cmd ("may-insert-fast-tracepoints", class_support
,
5121 &may_insert_fast_tracepoints_1
, _("\
5122 Set permission to insert fast tracepoints in the target."), _("\
5123 Show permission to insert fast tracepoints in the target."), _("\
5124 When this permission is on, GDB may insert fast tracepoints.\n\
5125 Otherwise, any sort of insertion attempt will result in an error."),
5126 set_target_permissions
, NULL
,
5127 &setlist
, &showlist
);
5129 add_setshow_boolean_cmd ("may-interrupt", class_support
,
5131 Set permission to interrupt or signal the target."), _("\
5132 Show permission to interrupt or signal the target."), _("\
5133 When this permission is on, GDB may interrupt/stop the target's execution.\n\
5134 Otherwise, any attempt to interrupt or stop will be ignored."),
5135 set_target_permissions
, NULL
,
5136 &setlist
, &showlist
);