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 INHERIT (to_supports_string_tracing
, t
);
691 INHERIT (to_trace_init
, t
);
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_supports_string_tracing
,
756 (int (*) (struct target_ops
*))
758 de_fault (to_trace_init
,
759 (void (*) (struct target_ops
*))
761 de_fault (to_download_tracepoint
,
762 (void (*) (struct target_ops
*, struct bp_location
*))
764 de_fault (to_can_download_tracepoint
,
765 (int (*) (struct target_ops
*))
767 de_fault (to_download_trace_state_variable
,
768 (void (*) (struct target_ops
*, struct trace_state_variable
*))
770 de_fault (to_enable_tracepoint
,
771 (void (*) (struct target_ops
*, struct bp_location
*))
773 de_fault (to_disable_tracepoint
,
774 (void (*) (struct target_ops
*, struct bp_location
*))
776 de_fault (to_trace_set_readonly_regions
,
777 (void (*) (struct target_ops
*))
779 de_fault (to_trace_start
,
780 (void (*) (struct target_ops
*))
782 de_fault (to_get_trace_status
,
783 (int (*) (struct target_ops
*, struct trace_status
*))
785 de_fault (to_get_tracepoint_status
,
786 (void (*) (struct target_ops
*, struct breakpoint
*,
787 struct uploaded_tp
*))
789 de_fault (to_trace_stop
,
790 (void (*) (struct target_ops
*))
792 de_fault (to_trace_find
,
793 (int (*) (struct target_ops
*,
794 enum trace_find_type
, int, CORE_ADDR
, CORE_ADDR
, int *))
796 de_fault (to_get_trace_state_variable_value
,
797 (int (*) (struct target_ops
*, int, LONGEST
*))
799 de_fault (to_save_trace_data
,
800 (int (*) (struct target_ops
*, const char *))
802 de_fault (to_upload_tracepoints
,
803 (int (*) (struct target_ops
*, struct uploaded_tp
**))
805 de_fault (to_upload_trace_state_variables
,
806 (int (*) (struct target_ops
*, struct uploaded_tsv
**))
808 de_fault (to_get_raw_trace_data
,
809 (LONGEST (*) (struct target_ops
*, gdb_byte
*, ULONGEST
, LONGEST
))
811 de_fault (to_get_min_fast_tracepoint_insn_len
,
812 (int (*) (struct target_ops
*))
814 de_fault (to_set_disconnected_tracing
,
815 (void (*) (struct target_ops
*, int))
817 de_fault (to_set_circular_trace_buffer
,
818 (void (*) (struct target_ops
*, int))
820 de_fault (to_set_trace_buffer_size
,
821 (void (*) (struct target_ops
*, LONGEST
))
823 de_fault (to_set_trace_notes
,
824 (int (*) (struct target_ops
*,
825 const char *, const char *, const char *))
827 de_fault (to_get_tib_address
,
828 (int (*) (struct target_ops
*, ptid_t
, CORE_ADDR
*))
830 de_fault (to_set_permissions
,
831 (void (*) (struct target_ops
*))
833 de_fault (to_static_tracepoint_marker_at
,
834 (int (*) (struct target_ops
*,
835 CORE_ADDR
, struct static_tracepoint_marker
*))
837 de_fault (to_static_tracepoint_markers_by_strid
,
838 (VEC(static_tracepoint_marker_p
) * (*) (struct target_ops
*,
841 de_fault (to_traceframe_info
,
842 (struct traceframe_info
* (*) (struct target_ops
*))
844 de_fault (to_supports_evaluation_of_breakpoint_conditions
,
845 (int (*) (struct target_ops
*))
847 de_fault (to_can_run_breakpoint_commands
,
848 (int (*) (struct target_ops
*))
850 de_fault (to_use_agent
,
851 (int (*) (struct target_ops
*, int))
853 de_fault (to_can_use_agent
,
854 (int (*) (struct target_ops
*))
856 de_fault (to_augmented_libraries_svr4_read
,
857 (int (*) (struct target_ops
*))
862 /* Finally, position the target-stack beneath the squashed
863 "current_target". That way code looking for a non-inherited
864 target method can quickly and simply find it. */
865 current_target
.beneath
= target_stack
;
868 setup_target_debug ();
871 /* Push a new target type into the stack of the existing target accessors,
872 possibly superseding some of the existing accessors.
874 Rather than allow an empty stack, we always have the dummy target at
875 the bottom stratum, so we can call the function vectors without
879 push_target (struct target_ops
*t
)
881 struct target_ops
**cur
;
883 /* Check magic number. If wrong, it probably means someone changed
884 the struct definition, but not all the places that initialize one. */
885 if (t
->to_magic
!= OPS_MAGIC
)
887 fprintf_unfiltered (gdb_stderr
,
888 "Magic number of %s target struct wrong\n",
890 internal_error (__FILE__
, __LINE__
,
891 _("failed internal consistency check"));
894 /* Find the proper stratum to install this target in. */
895 for (cur
= &target_stack
; (*cur
) != NULL
; cur
= &(*cur
)->beneath
)
897 if ((int) (t
->to_stratum
) >= (int) (*cur
)->to_stratum
)
901 /* If there's already targets at this stratum, remove them. */
902 /* FIXME: cagney/2003-10-15: I think this should be popping all
903 targets to CUR, and not just those at this stratum level. */
904 while ((*cur
) != NULL
&& t
->to_stratum
== (*cur
)->to_stratum
)
906 /* There's already something at this stratum level. Close it,
907 and un-hook it from the stack. */
908 struct target_ops
*tmp
= (*cur
);
910 (*cur
) = (*cur
)->beneath
;
915 /* We have removed all targets in our stratum, now add the new one. */
919 update_current_target ();
922 /* Remove a target_ops vector from the stack, wherever it may be.
923 Return how many times it was removed (0 or 1). */
926 unpush_target (struct target_ops
*t
)
928 struct target_ops
**cur
;
929 struct target_ops
*tmp
;
931 if (t
->to_stratum
== dummy_stratum
)
932 internal_error (__FILE__
, __LINE__
,
933 _("Attempt to unpush the dummy target"));
935 /* Look for the specified target. Note that we assume that a target
936 can only occur once in the target stack. */
938 for (cur
= &target_stack
; (*cur
) != NULL
; cur
= &(*cur
)->beneath
)
944 /* If we don't find target_ops, quit. Only open targets should be
949 /* Unchain the target. */
951 (*cur
) = (*cur
)->beneath
;
954 update_current_target ();
956 /* Finally close the target. Note we do this after unchaining, so
957 any target method calls from within the target_close
958 implementation don't end up in T anymore. */
965 pop_all_targets_above (enum strata above_stratum
)
967 while ((int) (current_target
.to_stratum
) > (int) above_stratum
)
969 if (!unpush_target (target_stack
))
971 fprintf_unfiltered (gdb_stderr
,
972 "pop_all_targets couldn't find target %s\n",
973 target_stack
->to_shortname
);
974 internal_error (__FILE__
, __LINE__
,
975 _("failed internal consistency check"));
982 pop_all_targets (void)
984 pop_all_targets_above (dummy_stratum
);
987 /* Return 1 if T is now pushed in the target stack. Return 0 otherwise. */
990 target_is_pushed (struct target_ops
*t
)
992 struct target_ops
**cur
;
994 /* Check magic number. If wrong, it probably means someone changed
995 the struct definition, but not all the places that initialize one. */
996 if (t
->to_magic
!= OPS_MAGIC
)
998 fprintf_unfiltered (gdb_stderr
,
999 "Magic number of %s target struct wrong\n",
1001 internal_error (__FILE__
, __LINE__
,
1002 _("failed internal consistency check"));
1005 for (cur
= &target_stack
; (*cur
) != NULL
; cur
= &(*cur
)->beneath
)
1012 /* Using the objfile specified in OBJFILE, find the address for the
1013 current thread's thread-local storage with offset OFFSET. */
1015 target_translate_tls_address (struct objfile
*objfile
, CORE_ADDR offset
)
1017 volatile CORE_ADDR addr
= 0;
1018 struct target_ops
*target
;
1020 for (target
= current_target
.beneath
;
1022 target
= target
->beneath
)
1024 if (target
->to_get_thread_local_address
!= NULL
)
1029 && gdbarch_fetch_tls_load_module_address_p (target_gdbarch ()))
1031 ptid_t ptid
= inferior_ptid
;
1032 volatile struct gdb_exception ex
;
1034 TRY_CATCH (ex
, RETURN_MASK_ALL
)
1038 /* Fetch the load module address for this objfile. */
1039 lm_addr
= gdbarch_fetch_tls_load_module_address (target_gdbarch (),
1041 /* If it's 0, throw the appropriate exception. */
1043 throw_error (TLS_LOAD_MODULE_NOT_FOUND_ERROR
,
1044 _("TLS load module not found"));
1046 addr
= target
->to_get_thread_local_address (target
, ptid
,
1049 /* If an error occurred, print TLS related messages here. Otherwise,
1050 throw the error to some higher catcher. */
1053 int objfile_is_library
= (objfile
->flags
& OBJF_SHARED
);
1057 case TLS_NO_LIBRARY_SUPPORT_ERROR
:
1058 error (_("Cannot find thread-local variables "
1059 "in this thread library."));
1061 case TLS_LOAD_MODULE_NOT_FOUND_ERROR
:
1062 if (objfile_is_library
)
1063 error (_("Cannot find shared library `%s' in dynamic"
1064 " linker's load module list"), objfile_name (objfile
));
1066 error (_("Cannot find executable file `%s' in dynamic"
1067 " linker's load module list"), objfile_name (objfile
));
1069 case TLS_NOT_ALLOCATED_YET_ERROR
:
1070 if (objfile_is_library
)
1071 error (_("The inferior has not yet allocated storage for"
1072 " thread-local variables in\n"
1073 "the shared library `%s'\n"
1075 objfile_name (objfile
), target_pid_to_str (ptid
));
1077 error (_("The inferior has not yet allocated storage for"
1078 " thread-local variables in\n"
1079 "the executable `%s'\n"
1081 objfile_name (objfile
), target_pid_to_str (ptid
));
1083 case TLS_GENERIC_ERROR
:
1084 if (objfile_is_library
)
1085 error (_("Cannot find thread-local storage for %s, "
1086 "shared library %s:\n%s"),
1087 target_pid_to_str (ptid
),
1088 objfile_name (objfile
), ex
.message
);
1090 error (_("Cannot find thread-local storage for %s, "
1091 "executable file %s:\n%s"),
1092 target_pid_to_str (ptid
),
1093 objfile_name (objfile
), ex
.message
);
1096 throw_exception (ex
);
1101 /* It wouldn't be wrong here to try a gdbarch method, too; finding
1102 TLS is an ABI-specific thing. But we don't do that yet. */
1104 error (_("Cannot find thread-local variables on this target"));
1110 target_xfer_status_to_string (enum target_xfer_status err
)
1112 #define CASE(X) case X: return #X
1115 CASE(TARGET_XFER_E_IO
);
1116 CASE(TARGET_XFER_E_UNAVAILABLE
);
1125 #define MIN(A, B) (((A) <= (B)) ? (A) : (B))
1127 /* target_read_string -- read a null terminated string, up to LEN bytes,
1128 from MEMADDR in target. Set *ERRNOP to the errno code, or 0 if successful.
1129 Set *STRING to a pointer to malloc'd memory containing the data; the caller
1130 is responsible for freeing it. Return the number of bytes successfully
1134 target_read_string (CORE_ADDR memaddr
, char **string
, int len
, int *errnop
)
1136 int tlen
, offset
, i
;
1140 int buffer_allocated
;
1142 unsigned int nbytes_read
= 0;
1144 gdb_assert (string
);
1146 /* Small for testing. */
1147 buffer_allocated
= 4;
1148 buffer
= xmalloc (buffer_allocated
);
1153 tlen
= MIN (len
, 4 - (memaddr
& 3));
1154 offset
= memaddr
& 3;
1156 errcode
= target_read_memory (memaddr
& ~3, buf
, sizeof buf
);
1159 /* The transfer request might have crossed the boundary to an
1160 unallocated region of memory. Retry the transfer, requesting
1164 errcode
= target_read_memory (memaddr
, buf
, 1);
1169 if (bufptr
- buffer
+ tlen
> buffer_allocated
)
1173 bytes
= bufptr
- buffer
;
1174 buffer_allocated
*= 2;
1175 buffer
= xrealloc (buffer
, buffer_allocated
);
1176 bufptr
= buffer
+ bytes
;
1179 for (i
= 0; i
< tlen
; i
++)
1181 *bufptr
++ = buf
[i
+ offset
];
1182 if (buf
[i
+ offset
] == '\000')
1184 nbytes_read
+= i
+ 1;
1191 nbytes_read
+= tlen
;
1200 struct target_section_table
*
1201 target_get_section_table (struct target_ops
*target
)
1203 struct target_ops
*t
;
1206 fprintf_unfiltered (gdb_stdlog
, "target_get_section_table ()\n");
1208 for (t
= target
; t
!= NULL
; t
= t
->beneath
)
1209 if (t
->to_get_section_table
!= NULL
)
1210 return (*t
->to_get_section_table
) (t
);
1215 /* Find a section containing ADDR. */
1217 struct target_section
*
1218 target_section_by_addr (struct target_ops
*target
, CORE_ADDR addr
)
1220 struct target_section_table
*table
= target_get_section_table (target
);
1221 struct target_section
*secp
;
1226 for (secp
= table
->sections
; secp
< table
->sections_end
; secp
++)
1228 if (addr
>= secp
->addr
&& addr
< secp
->endaddr
)
1234 /* Read memory from the live target, even if currently inspecting a
1235 traceframe. The return is the same as that of target_read. */
1237 static enum target_xfer_status
1238 target_read_live_memory (enum target_object object
,
1239 ULONGEST memaddr
, gdb_byte
*myaddr
, ULONGEST len
,
1240 ULONGEST
*xfered_len
)
1242 enum target_xfer_status ret
;
1243 struct cleanup
*cleanup
;
1245 /* Switch momentarily out of tfind mode so to access live memory.
1246 Note that this must not clear global state, such as the frame
1247 cache, which must still remain valid for the previous traceframe.
1248 We may be _building_ the frame cache at this point. */
1249 cleanup
= make_cleanup_restore_traceframe_number ();
1250 set_traceframe_number (-1);
1252 ret
= target_xfer_partial (current_target
.beneath
, object
, NULL
,
1253 myaddr
, NULL
, memaddr
, len
, xfered_len
);
1255 do_cleanups (cleanup
);
1259 /* Using the set of read-only target sections of OPS, read live
1260 read-only memory. Note that the actual reads start from the
1261 top-most target again.
1263 For interface/parameters/return description see target.h,
1266 static enum target_xfer_status
1267 memory_xfer_live_readonly_partial (struct target_ops
*ops
,
1268 enum target_object object
,
1269 gdb_byte
*readbuf
, ULONGEST memaddr
,
1270 ULONGEST len
, ULONGEST
*xfered_len
)
1272 struct target_section
*secp
;
1273 struct target_section_table
*table
;
1275 secp
= target_section_by_addr (ops
, memaddr
);
1277 && (bfd_get_section_flags (secp
->the_bfd_section
->owner
,
1278 secp
->the_bfd_section
)
1281 struct target_section
*p
;
1282 ULONGEST memend
= memaddr
+ len
;
1284 table
= target_get_section_table (ops
);
1286 for (p
= table
->sections
; p
< table
->sections_end
; p
++)
1288 if (memaddr
>= p
->addr
)
1290 if (memend
<= p
->endaddr
)
1292 /* Entire transfer is within this section. */
1293 return target_read_live_memory (object
, memaddr
,
1294 readbuf
, len
, xfered_len
);
1296 else if (memaddr
>= p
->endaddr
)
1298 /* This section ends before the transfer starts. */
1303 /* This section overlaps the transfer. Just do half. */
1304 len
= p
->endaddr
- memaddr
;
1305 return target_read_live_memory (object
, memaddr
,
1306 readbuf
, len
, xfered_len
);
1312 return TARGET_XFER_EOF
;
1315 /* Read memory from more than one valid target. A core file, for
1316 instance, could have some of memory but delegate other bits to
1317 the target below it. So, we must manually try all targets. */
1319 static enum target_xfer_status
1320 raw_memory_xfer_partial (struct target_ops
*ops
, gdb_byte
*readbuf
,
1321 const gdb_byte
*writebuf
, ULONGEST memaddr
, LONGEST len
,
1322 ULONGEST
*xfered_len
)
1324 enum target_xfer_status res
;
1328 res
= ops
->to_xfer_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1329 readbuf
, writebuf
, memaddr
, len
,
1331 if (res
== TARGET_XFER_OK
)
1334 /* Stop if the target reports that the memory is not available. */
1335 if (res
== TARGET_XFER_E_UNAVAILABLE
)
1338 /* We want to continue past core files to executables, but not
1339 past a running target's memory. */
1340 if (ops
->to_has_all_memory (ops
))
1345 while (ops
!= NULL
);
1350 /* Perform a partial memory transfer.
1351 For docs see target.h, to_xfer_partial. */
1353 static enum target_xfer_status
1354 memory_xfer_partial_1 (struct target_ops
*ops
, enum target_object object
,
1355 gdb_byte
*readbuf
, const gdb_byte
*writebuf
, ULONGEST memaddr
,
1356 ULONGEST len
, ULONGEST
*xfered_len
)
1358 enum target_xfer_status res
;
1360 struct mem_region
*region
;
1361 struct inferior
*inf
;
1363 /* For accesses to unmapped overlay sections, read directly from
1364 files. Must do this first, as MEMADDR may need adjustment. */
1365 if (readbuf
!= NULL
&& overlay_debugging
)
1367 struct obj_section
*section
= find_pc_overlay (memaddr
);
1369 if (pc_in_unmapped_range (memaddr
, section
))
1371 struct target_section_table
*table
1372 = target_get_section_table (ops
);
1373 const char *section_name
= section
->the_bfd_section
->name
;
1375 memaddr
= overlay_mapped_address (memaddr
, section
);
1376 return section_table_xfer_memory_partial (readbuf
, writebuf
,
1377 memaddr
, len
, xfered_len
,
1379 table
->sections_end
,
1384 /* Try the executable files, if "trust-readonly-sections" is set. */
1385 if (readbuf
!= NULL
&& trust_readonly
)
1387 struct target_section
*secp
;
1388 struct target_section_table
*table
;
1390 secp
= target_section_by_addr (ops
, memaddr
);
1392 && (bfd_get_section_flags (secp
->the_bfd_section
->owner
,
1393 secp
->the_bfd_section
)
1396 table
= target_get_section_table (ops
);
1397 return section_table_xfer_memory_partial (readbuf
, writebuf
,
1398 memaddr
, len
, xfered_len
,
1400 table
->sections_end
,
1405 /* If reading unavailable memory in the context of traceframes, and
1406 this address falls within a read-only section, fallback to
1407 reading from live memory. */
1408 if (readbuf
!= NULL
&& get_traceframe_number () != -1)
1410 VEC(mem_range_s
) *available
;
1412 /* If we fail to get the set of available memory, then the
1413 target does not support querying traceframe info, and so we
1414 attempt reading from the traceframe anyway (assuming the
1415 target implements the old QTro packet then). */
1416 if (traceframe_available_memory (&available
, memaddr
, len
))
1418 struct cleanup
*old_chain
;
1420 old_chain
= make_cleanup (VEC_cleanup(mem_range_s
), &available
);
1422 if (VEC_empty (mem_range_s
, available
)
1423 || VEC_index (mem_range_s
, available
, 0)->start
!= memaddr
)
1425 /* Don't read into the traceframe's available
1427 if (!VEC_empty (mem_range_s
, available
))
1429 LONGEST oldlen
= len
;
1431 len
= VEC_index (mem_range_s
, available
, 0)->start
- memaddr
;
1432 gdb_assert (len
<= oldlen
);
1435 do_cleanups (old_chain
);
1437 /* This goes through the topmost target again. */
1438 res
= memory_xfer_live_readonly_partial (ops
, object
,
1441 if (res
== TARGET_XFER_OK
)
1442 return TARGET_XFER_OK
;
1445 /* No use trying further, we know some memory starting
1446 at MEMADDR isn't available. */
1448 return TARGET_XFER_E_UNAVAILABLE
;
1452 /* Don't try to read more than how much is available, in
1453 case the target implements the deprecated QTro packet to
1454 cater for older GDBs (the target's knowledge of read-only
1455 sections may be outdated by now). */
1456 len
= VEC_index (mem_range_s
, available
, 0)->length
;
1458 do_cleanups (old_chain
);
1462 /* Try GDB's internal data cache. */
1463 region
= lookup_mem_region (memaddr
);
1464 /* region->hi == 0 means there's no upper bound. */
1465 if (memaddr
+ len
< region
->hi
|| region
->hi
== 0)
1468 reg_len
= region
->hi
- memaddr
;
1470 switch (region
->attrib
.mode
)
1473 if (writebuf
!= NULL
)
1474 return TARGET_XFER_E_IO
;
1478 if (readbuf
!= NULL
)
1479 return TARGET_XFER_E_IO
;
1483 /* We only support writing to flash during "load" for now. */
1484 if (writebuf
!= NULL
)
1485 error (_("Writing to flash memory forbidden in this context"));
1489 return TARGET_XFER_E_IO
;
1492 if (!ptid_equal (inferior_ptid
, null_ptid
))
1493 inf
= find_inferior_pid (ptid_get_pid (inferior_ptid
));
1498 /* The dcache reads whole cache lines; that doesn't play well
1499 with reading from a trace buffer, because reading outside of
1500 the collected memory range fails. */
1501 && get_traceframe_number () == -1
1502 && (region
->attrib
.cache
1503 || (stack_cache_enabled_p () && object
== TARGET_OBJECT_STACK_MEMORY
)
1504 || (code_cache_enabled_p () && object
== TARGET_OBJECT_CODE_MEMORY
)))
1506 DCACHE
*dcache
= target_dcache_get_or_init ();
1509 if (readbuf
!= NULL
)
1510 l
= dcache_xfer_memory (ops
, dcache
, memaddr
, readbuf
, reg_len
, 0);
1512 /* FIXME drow/2006-08-09: If we're going to preserve const
1513 correctness dcache_xfer_memory should take readbuf and
1515 l
= dcache_xfer_memory (ops
, dcache
, memaddr
, (void *) writebuf
,
1518 return TARGET_XFER_E_IO
;
1521 *xfered_len
= (ULONGEST
) l
;
1522 return TARGET_XFER_OK
;
1526 /* If none of those methods found the memory we wanted, fall back
1527 to a target partial transfer. Normally a single call to
1528 to_xfer_partial is enough; if it doesn't recognize an object
1529 it will call the to_xfer_partial of the next target down.
1530 But for memory this won't do. Memory is the only target
1531 object which can be read from more than one valid target.
1532 A core file, for instance, could have some of memory but
1533 delegate other bits to the target below it. So, we must
1534 manually try all targets. */
1536 res
= raw_memory_xfer_partial (ops
, readbuf
, writebuf
, memaddr
, reg_len
,
1539 /* Make sure the cache gets updated no matter what - if we are writing
1540 to the stack. Even if this write is not tagged as such, we still need
1541 to update the cache. */
1543 if (res
== TARGET_XFER_OK
1546 && target_dcache_init_p ()
1547 && !region
->attrib
.cache
1548 && ((stack_cache_enabled_p () && object
!= TARGET_OBJECT_STACK_MEMORY
)
1549 || (code_cache_enabled_p () && object
!= TARGET_OBJECT_CODE_MEMORY
)))
1551 DCACHE
*dcache
= target_dcache_get ();
1553 dcache_update (dcache
, memaddr
, (void *) writebuf
, reg_len
);
1556 /* If we still haven't got anything, return the last error. We
1561 /* Perform a partial memory transfer. For docs see target.h,
1564 static enum target_xfer_status
1565 memory_xfer_partial (struct target_ops
*ops
, enum target_object object
,
1566 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1567 ULONGEST memaddr
, ULONGEST len
, ULONGEST
*xfered_len
)
1569 enum target_xfer_status res
;
1571 /* Zero length requests are ok and require no work. */
1573 return TARGET_XFER_EOF
;
1575 /* Fill in READBUF with breakpoint shadows, or WRITEBUF with
1576 breakpoint insns, thus hiding out from higher layers whether
1577 there are software breakpoints inserted in the code stream. */
1578 if (readbuf
!= NULL
)
1580 res
= memory_xfer_partial_1 (ops
, object
, readbuf
, NULL
, memaddr
, len
,
1583 if (res
== TARGET_XFER_OK
&& !show_memory_breakpoints
)
1584 breakpoint_xfer_memory (readbuf
, NULL
, NULL
, memaddr
, res
);
1589 struct cleanup
*old_chain
;
1591 /* A large write request is likely to be partially satisfied
1592 by memory_xfer_partial_1. We will continually malloc
1593 and free a copy of the entire write request for breakpoint
1594 shadow handling even though we only end up writing a small
1595 subset of it. Cap writes to 4KB to mitigate this. */
1596 len
= min (4096, len
);
1598 buf
= xmalloc (len
);
1599 old_chain
= make_cleanup (xfree
, buf
);
1600 memcpy (buf
, writebuf
, len
);
1602 breakpoint_xfer_memory (NULL
, buf
, writebuf
, memaddr
, len
);
1603 res
= memory_xfer_partial_1 (ops
, object
, NULL
, buf
, memaddr
, len
,
1606 do_cleanups (old_chain
);
1613 restore_show_memory_breakpoints (void *arg
)
1615 show_memory_breakpoints
= (uintptr_t) arg
;
1619 make_show_memory_breakpoints_cleanup (int show
)
1621 int current
= show_memory_breakpoints
;
1623 show_memory_breakpoints
= show
;
1624 return make_cleanup (restore_show_memory_breakpoints
,
1625 (void *) (uintptr_t) current
);
1628 /* For docs see target.h, to_xfer_partial. */
1630 enum target_xfer_status
1631 target_xfer_partial (struct target_ops
*ops
,
1632 enum target_object object
, const char *annex
,
1633 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1634 ULONGEST offset
, ULONGEST len
,
1635 ULONGEST
*xfered_len
)
1637 enum target_xfer_status retval
;
1639 gdb_assert (ops
->to_xfer_partial
!= NULL
);
1641 /* Transfer is done when LEN is zero. */
1643 return TARGET_XFER_EOF
;
1645 if (writebuf
&& !may_write_memory
)
1646 error (_("Writing to memory is not allowed (addr %s, len %s)"),
1647 core_addr_to_string_nz (offset
), plongest (len
));
1651 /* If this is a memory transfer, let the memory-specific code
1652 have a look at it instead. Memory transfers are more
1654 if (object
== TARGET_OBJECT_MEMORY
|| object
== TARGET_OBJECT_STACK_MEMORY
1655 || object
== TARGET_OBJECT_CODE_MEMORY
)
1656 retval
= memory_xfer_partial (ops
, object
, readbuf
,
1657 writebuf
, offset
, len
, xfered_len
);
1658 else if (object
== TARGET_OBJECT_RAW_MEMORY
)
1660 /* Request the normal memory object from other layers. */
1661 retval
= raw_memory_xfer_partial (ops
, readbuf
, writebuf
, offset
, len
,
1665 retval
= ops
->to_xfer_partial (ops
, object
, annex
, readbuf
,
1666 writebuf
, offset
, len
, xfered_len
);
1670 const unsigned char *myaddr
= NULL
;
1672 fprintf_unfiltered (gdb_stdlog
,
1673 "%s:target_xfer_partial "
1674 "(%d, %s, %s, %s, %s, %s) = %d, %s",
1677 (annex
? annex
: "(null)"),
1678 host_address_to_string (readbuf
),
1679 host_address_to_string (writebuf
),
1680 core_addr_to_string_nz (offset
),
1681 pulongest (len
), retval
,
1682 pulongest (*xfered_len
));
1688 if (retval
== TARGET_XFER_OK
&& myaddr
!= NULL
)
1692 fputs_unfiltered (", bytes =", gdb_stdlog
);
1693 for (i
= 0; i
< *xfered_len
; i
++)
1695 if ((((intptr_t) &(myaddr
[i
])) & 0xf) == 0)
1697 if (targetdebug
< 2 && i
> 0)
1699 fprintf_unfiltered (gdb_stdlog
, " ...");
1702 fprintf_unfiltered (gdb_stdlog
, "\n");
1705 fprintf_unfiltered (gdb_stdlog
, " %02x", myaddr
[i
] & 0xff);
1709 fputc_unfiltered ('\n', gdb_stdlog
);
1712 /* Check implementations of to_xfer_partial update *XFERED_LEN
1713 properly. Do assertion after printing debug messages, so that we
1714 can find more clues on assertion failure from debugging messages. */
1715 if (retval
== TARGET_XFER_OK
|| retval
== TARGET_XFER_E_UNAVAILABLE
)
1716 gdb_assert (*xfered_len
> 0);
1721 /* Read LEN bytes of target memory at address MEMADDR, placing the
1722 results in GDB's memory at MYADDR. Returns either 0 for success or
1723 TARGET_XFER_E_IO if any error occurs.
1725 If an error occurs, no guarantee is made about the contents of the data at
1726 MYADDR. In particular, the caller should not depend upon partial reads
1727 filling the buffer with good data. There is no way for the caller to know
1728 how much good data might have been transfered anyway. Callers that can
1729 deal with partial reads should call target_read (which will retry until
1730 it makes no progress, and then return how much was transferred). */
1733 target_read_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1735 /* Dispatch to the topmost target, not the flattened current_target.
1736 Memory accesses check target->to_has_(all_)memory, and the
1737 flattened target doesn't inherit those. */
1738 if (target_read (current_target
.beneath
, TARGET_OBJECT_MEMORY
, NULL
,
1739 myaddr
, memaddr
, len
) == len
)
1742 return TARGET_XFER_E_IO
;
1745 /* Like target_read_memory, but specify explicitly that this is a read
1746 from the target's raw memory. That is, this read bypasses the
1747 dcache, breakpoint shadowing, etc. */
1750 target_read_raw_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1752 /* See comment in target_read_memory about why the request starts at
1753 current_target.beneath. */
1754 if (target_read (current_target
.beneath
, TARGET_OBJECT_RAW_MEMORY
, NULL
,
1755 myaddr
, memaddr
, len
) == len
)
1758 return TARGET_XFER_E_IO
;
1761 /* Like target_read_memory, but specify explicitly that this is a read from
1762 the target's stack. This may trigger different cache behavior. */
1765 target_read_stack (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1767 /* See comment in target_read_memory about why the request starts at
1768 current_target.beneath. */
1769 if (target_read (current_target
.beneath
, TARGET_OBJECT_STACK_MEMORY
, NULL
,
1770 myaddr
, memaddr
, len
) == len
)
1773 return TARGET_XFER_E_IO
;
1776 /* Like target_read_memory, but specify explicitly that this is a read from
1777 the target's code. This may trigger different cache behavior. */
1780 target_read_code (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1782 /* See comment in target_read_memory about why the request starts at
1783 current_target.beneath. */
1784 if (target_read (current_target
.beneath
, TARGET_OBJECT_CODE_MEMORY
, NULL
,
1785 myaddr
, memaddr
, len
) == len
)
1788 return TARGET_XFER_E_IO
;
1791 /* Write LEN bytes from MYADDR to target memory at address MEMADDR.
1792 Returns either 0 for success or TARGET_XFER_E_IO if any
1793 error occurs. If an error occurs, no guarantee is made about how
1794 much data got written. Callers that can deal with partial writes
1795 should call target_write. */
1798 target_write_memory (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ssize_t len
)
1800 /* See comment in target_read_memory about why the request starts at
1801 current_target.beneath. */
1802 if (target_write (current_target
.beneath
, TARGET_OBJECT_MEMORY
, NULL
,
1803 myaddr
, memaddr
, len
) == len
)
1806 return TARGET_XFER_E_IO
;
1809 /* Write LEN bytes from MYADDR to target raw memory at address
1810 MEMADDR. Returns either 0 for success or TARGET_XFER_E_IO
1811 if any error occurs. If an error occurs, no guarantee is made
1812 about how much data got written. Callers that can deal with
1813 partial writes should call target_write. */
1816 target_write_raw_memory (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ssize_t len
)
1818 /* See comment in target_read_memory about why the request starts at
1819 current_target.beneath. */
1820 if (target_write (current_target
.beneath
, TARGET_OBJECT_RAW_MEMORY
, NULL
,
1821 myaddr
, memaddr
, len
) == len
)
1824 return TARGET_XFER_E_IO
;
1827 /* Fetch the target's memory map. */
1830 target_memory_map (void)
1832 VEC(mem_region_s
) *result
;
1833 struct mem_region
*last_one
, *this_one
;
1835 struct target_ops
*t
;
1838 fprintf_unfiltered (gdb_stdlog
, "target_memory_map ()\n");
1840 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
1841 if (t
->to_memory_map
!= NULL
)
1847 result
= t
->to_memory_map (t
);
1851 qsort (VEC_address (mem_region_s
, result
),
1852 VEC_length (mem_region_s
, result
),
1853 sizeof (struct mem_region
), mem_region_cmp
);
1855 /* Check that regions do not overlap. Simultaneously assign
1856 a numbering for the "mem" commands to use to refer to
1859 for (ix
= 0; VEC_iterate (mem_region_s
, result
, ix
, this_one
); ix
++)
1861 this_one
->number
= ix
;
1863 if (last_one
&& last_one
->hi
> this_one
->lo
)
1865 warning (_("Overlapping regions in memory map: ignoring"));
1866 VEC_free (mem_region_s
, result
);
1869 last_one
= this_one
;
1876 target_flash_erase (ULONGEST address
, LONGEST length
)
1878 struct target_ops
*t
;
1880 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
1881 if (t
->to_flash_erase
!= NULL
)
1884 fprintf_unfiltered (gdb_stdlog
, "target_flash_erase (%s, %s)\n",
1885 hex_string (address
), phex (length
, 0));
1886 t
->to_flash_erase (t
, address
, length
);
1894 target_flash_done (void)
1896 struct target_ops
*t
;
1898 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
1899 if (t
->to_flash_done
!= NULL
)
1902 fprintf_unfiltered (gdb_stdlog
, "target_flash_done\n");
1903 t
->to_flash_done (t
);
1911 show_trust_readonly (struct ui_file
*file
, int from_tty
,
1912 struct cmd_list_element
*c
, const char *value
)
1914 fprintf_filtered (file
,
1915 _("Mode for reading from readonly sections is %s.\n"),
1919 /* More generic transfers. */
1921 static enum target_xfer_status
1922 default_xfer_partial (struct target_ops
*ops
, enum target_object object
,
1923 const char *annex
, gdb_byte
*readbuf
,
1924 const gdb_byte
*writebuf
, ULONGEST offset
, ULONGEST len
,
1925 ULONGEST
*xfered_len
)
1927 if (object
== TARGET_OBJECT_MEMORY
1928 && ops
->deprecated_xfer_memory
!= NULL
)
1929 /* If available, fall back to the target's
1930 "deprecated_xfer_memory" method. */
1935 if (writebuf
!= NULL
)
1937 void *buffer
= xmalloc (len
);
1938 struct cleanup
*cleanup
= make_cleanup (xfree
, buffer
);
1940 memcpy (buffer
, writebuf
, len
);
1941 xfered
= ops
->deprecated_xfer_memory (offset
, buffer
, len
,
1942 1/*write*/, NULL
, ops
);
1943 do_cleanups (cleanup
);
1945 if (readbuf
!= NULL
)
1946 xfered
= ops
->deprecated_xfer_memory (offset
, readbuf
, len
,
1947 0/*read*/, NULL
, ops
);
1950 *xfered_len
= (ULONGEST
) xfered
;
1951 return TARGET_XFER_E_IO
;
1953 else if (xfered
== 0 && errno
== 0)
1954 /* "deprecated_xfer_memory" uses 0, cross checked against
1955 ERRNO as one indication of an error. */
1956 return TARGET_XFER_EOF
;
1958 return TARGET_XFER_E_IO
;
1962 gdb_assert (ops
->beneath
!= NULL
);
1963 return ops
->beneath
->to_xfer_partial (ops
->beneath
, object
, annex
,
1964 readbuf
, writebuf
, offset
, len
,
1969 /* Target vector read/write partial wrapper functions. */
1971 static enum target_xfer_status
1972 target_read_partial (struct target_ops
*ops
,
1973 enum target_object object
,
1974 const char *annex
, gdb_byte
*buf
,
1975 ULONGEST offset
, ULONGEST len
,
1976 ULONGEST
*xfered_len
)
1978 return target_xfer_partial (ops
, object
, annex
, buf
, NULL
, offset
, len
,
1982 static enum target_xfer_status
1983 target_write_partial (struct target_ops
*ops
,
1984 enum target_object object
,
1985 const char *annex
, const gdb_byte
*buf
,
1986 ULONGEST offset
, LONGEST len
, ULONGEST
*xfered_len
)
1988 return target_xfer_partial (ops
, object
, annex
, NULL
, buf
, offset
, len
,
1992 /* Wrappers to perform the full transfer. */
1994 /* For docs on target_read see target.h. */
1997 target_read (struct target_ops
*ops
,
1998 enum target_object object
,
1999 const char *annex
, gdb_byte
*buf
,
2000 ULONGEST offset
, LONGEST len
)
2004 while (xfered
< len
)
2006 ULONGEST xfered_len
;
2007 enum target_xfer_status status
;
2009 status
= target_read_partial (ops
, object
, annex
,
2010 (gdb_byte
*) buf
+ xfered
,
2011 offset
+ xfered
, len
- xfered
,
2014 /* Call an observer, notifying them of the xfer progress? */
2015 if (status
== TARGET_XFER_EOF
)
2017 else if (status
== TARGET_XFER_OK
)
2019 xfered
+= xfered_len
;
2029 /* Assuming that the entire [begin, end) range of memory cannot be
2030 read, try to read whatever subrange is possible to read.
2032 The function returns, in RESULT, either zero or one memory block.
2033 If there's a readable subrange at the beginning, it is completely
2034 read and returned. Any further readable subrange will not be read.
2035 Otherwise, if there's a readable subrange at the end, it will be
2036 completely read and returned. Any readable subranges before it
2037 (obviously, not starting at the beginning), will be ignored. In
2038 other cases -- either no readable subrange, or readable subrange(s)
2039 that is neither at the beginning, or end, nothing is returned.
2041 The purpose of this function is to handle a read across a boundary
2042 of accessible memory in a case when memory map is not available.
2043 The above restrictions are fine for this case, but will give
2044 incorrect results if the memory is 'patchy'. However, supporting
2045 'patchy' memory would require trying to read every single byte,
2046 and it seems unacceptable solution. Explicit memory map is
2047 recommended for this case -- and target_read_memory_robust will
2048 take care of reading multiple ranges then. */
2051 read_whatever_is_readable (struct target_ops
*ops
,
2052 ULONGEST begin
, ULONGEST end
,
2053 VEC(memory_read_result_s
) **result
)
2055 gdb_byte
*buf
= xmalloc (end
- begin
);
2056 ULONGEST current_begin
= begin
;
2057 ULONGEST current_end
= end
;
2059 memory_read_result_s r
;
2060 ULONGEST xfered_len
;
2062 /* If we previously failed to read 1 byte, nothing can be done here. */
2063 if (end
- begin
<= 1)
2069 /* Check that either first or the last byte is readable, and give up
2070 if not. This heuristic is meant to permit reading accessible memory
2071 at the boundary of accessible region. */
2072 if (target_read_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2073 buf
, begin
, 1, &xfered_len
) == TARGET_XFER_OK
)
2078 else if (target_read_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2079 buf
+ (end
-begin
) - 1, end
- 1, 1,
2080 &xfered_len
) == TARGET_XFER_OK
)
2091 /* Loop invariant is that the [current_begin, current_end) was previously
2092 found to be not readable as a whole.
2094 Note loop condition -- if the range has 1 byte, we can't divide the range
2095 so there's no point trying further. */
2096 while (current_end
- current_begin
> 1)
2098 ULONGEST first_half_begin
, first_half_end
;
2099 ULONGEST second_half_begin
, second_half_end
;
2101 ULONGEST middle
= current_begin
+ (current_end
- current_begin
)/2;
2105 first_half_begin
= current_begin
;
2106 first_half_end
= middle
;
2107 second_half_begin
= middle
;
2108 second_half_end
= current_end
;
2112 first_half_begin
= middle
;
2113 first_half_end
= current_end
;
2114 second_half_begin
= current_begin
;
2115 second_half_end
= middle
;
2118 xfer
= target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2119 buf
+ (first_half_begin
- begin
),
2121 first_half_end
- first_half_begin
);
2123 if (xfer
== first_half_end
- first_half_begin
)
2125 /* This half reads up fine. So, the error must be in the
2127 current_begin
= second_half_begin
;
2128 current_end
= second_half_end
;
2132 /* This half is not readable. Because we've tried one byte, we
2133 know some part of this half if actually redable. Go to the next
2134 iteration to divide again and try to read.
2136 We don't handle the other half, because this function only tries
2137 to read a single readable subrange. */
2138 current_begin
= first_half_begin
;
2139 current_end
= first_half_end
;
2145 /* The [begin, current_begin) range has been read. */
2147 r
.end
= current_begin
;
2152 /* The [current_end, end) range has been read. */
2153 LONGEST rlen
= end
- current_end
;
2155 r
.data
= xmalloc (rlen
);
2156 memcpy (r
.data
, buf
+ current_end
- begin
, rlen
);
2157 r
.begin
= current_end
;
2161 VEC_safe_push(memory_read_result_s
, (*result
), &r
);
2165 free_memory_read_result_vector (void *x
)
2167 VEC(memory_read_result_s
) *v
= x
;
2168 memory_read_result_s
*current
;
2171 for (ix
= 0; VEC_iterate (memory_read_result_s
, v
, ix
, current
); ++ix
)
2173 xfree (current
->data
);
2175 VEC_free (memory_read_result_s
, v
);
2178 VEC(memory_read_result_s
) *
2179 read_memory_robust (struct target_ops
*ops
, ULONGEST offset
, LONGEST len
)
2181 VEC(memory_read_result_s
) *result
= 0;
2184 while (xfered
< len
)
2186 struct mem_region
*region
= lookup_mem_region (offset
+ xfered
);
2189 /* If there is no explicit region, a fake one should be created. */
2190 gdb_assert (region
);
2192 if (region
->hi
== 0)
2193 rlen
= len
- xfered
;
2195 rlen
= region
->hi
- offset
;
2197 if (region
->attrib
.mode
== MEM_NONE
|| region
->attrib
.mode
== MEM_WO
)
2199 /* Cannot read this region. Note that we can end up here only
2200 if the region is explicitly marked inaccessible, or
2201 'inaccessible-by-default' is in effect. */
2206 LONGEST to_read
= min (len
- xfered
, rlen
);
2207 gdb_byte
*buffer
= (gdb_byte
*)xmalloc (to_read
);
2209 LONGEST xfer
= target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2210 (gdb_byte
*) buffer
,
2211 offset
+ xfered
, to_read
);
2212 /* Call an observer, notifying them of the xfer progress? */
2215 /* Got an error reading full chunk. See if maybe we can read
2218 read_whatever_is_readable (ops
, offset
+ xfered
,
2219 offset
+ xfered
+ to_read
, &result
);
2224 struct memory_read_result r
;
2226 r
.begin
= offset
+ xfered
;
2227 r
.end
= r
.begin
+ xfer
;
2228 VEC_safe_push (memory_read_result_s
, result
, &r
);
2238 /* An alternative to target_write with progress callbacks. */
2241 target_write_with_progress (struct target_ops
*ops
,
2242 enum target_object object
,
2243 const char *annex
, const gdb_byte
*buf
,
2244 ULONGEST offset
, LONGEST len
,
2245 void (*progress
) (ULONGEST
, void *), void *baton
)
2249 /* Give the progress callback a chance to set up. */
2251 (*progress
) (0, baton
);
2253 while (xfered
< len
)
2255 ULONGEST xfered_len
;
2256 enum target_xfer_status status
;
2258 status
= target_write_partial (ops
, object
, annex
,
2259 (gdb_byte
*) buf
+ xfered
,
2260 offset
+ xfered
, len
- xfered
,
2263 if (status
== TARGET_XFER_EOF
)
2265 if (TARGET_XFER_STATUS_ERROR_P (status
))
2268 gdb_assert (status
== TARGET_XFER_OK
);
2270 (*progress
) (xfered_len
, baton
);
2272 xfered
+= xfered_len
;
2278 /* For docs on target_write see target.h. */
2281 target_write (struct target_ops
*ops
,
2282 enum target_object object
,
2283 const char *annex
, const gdb_byte
*buf
,
2284 ULONGEST offset
, LONGEST len
)
2286 return target_write_with_progress (ops
, object
, annex
, buf
, offset
, len
,
2290 /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return
2291 the size of the transferred data. PADDING additional bytes are
2292 available in *BUF_P. This is a helper function for
2293 target_read_alloc; see the declaration of that function for more
2297 target_read_alloc_1 (struct target_ops
*ops
, enum target_object object
,
2298 const char *annex
, gdb_byte
**buf_p
, int padding
)
2300 size_t buf_alloc
, buf_pos
;
2303 /* This function does not have a length parameter; it reads the
2304 entire OBJECT). Also, it doesn't support objects fetched partly
2305 from one target and partly from another (in a different stratum,
2306 e.g. a core file and an executable). Both reasons make it
2307 unsuitable for reading memory. */
2308 gdb_assert (object
!= TARGET_OBJECT_MEMORY
);
2310 /* Start by reading up to 4K at a time. The target will throttle
2311 this number down if necessary. */
2313 buf
= xmalloc (buf_alloc
);
2317 ULONGEST xfered_len
;
2318 enum target_xfer_status status
;
2320 status
= target_read_partial (ops
, object
, annex
, &buf
[buf_pos
],
2321 buf_pos
, buf_alloc
- buf_pos
- padding
,
2324 if (status
== TARGET_XFER_EOF
)
2326 /* Read all there was. */
2333 else if (status
!= TARGET_XFER_OK
)
2335 /* An error occurred. */
2337 return TARGET_XFER_E_IO
;
2340 buf_pos
+= xfered_len
;
2342 /* If the buffer is filling up, expand it. */
2343 if (buf_alloc
< buf_pos
* 2)
2346 buf
= xrealloc (buf
, buf_alloc
);
2353 /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return
2354 the size of the transferred data. See the declaration in "target.h"
2355 function for more information about the return value. */
2358 target_read_alloc (struct target_ops
*ops
, enum target_object object
,
2359 const char *annex
, gdb_byte
**buf_p
)
2361 return target_read_alloc_1 (ops
, object
, annex
, buf_p
, 0);
2364 /* Read OBJECT/ANNEX using OPS. The result is NUL-terminated and
2365 returned as a string, allocated using xmalloc. If an error occurs
2366 or the transfer is unsupported, NULL is returned. Empty objects
2367 are returned as allocated but empty strings. A warning is issued
2368 if the result contains any embedded NUL bytes. */
2371 target_read_stralloc (struct target_ops
*ops
, enum target_object object
,
2376 LONGEST i
, transferred
;
2378 transferred
= target_read_alloc_1 (ops
, object
, annex
, &buffer
, 1);
2379 bufstr
= (char *) buffer
;
2381 if (transferred
< 0)
2384 if (transferred
== 0)
2385 return xstrdup ("");
2387 bufstr
[transferred
] = 0;
2389 /* Check for embedded NUL bytes; but allow trailing NULs. */
2390 for (i
= strlen (bufstr
); i
< transferred
; i
++)
2393 warning (_("target object %d, annex %s, "
2394 "contained unexpected null characters"),
2395 (int) object
, annex
? annex
: "(none)");
2402 /* Memory transfer methods. */
2405 get_target_memory (struct target_ops
*ops
, CORE_ADDR addr
, gdb_byte
*buf
,
2408 /* This method is used to read from an alternate, non-current
2409 target. This read must bypass the overlay support (as symbols
2410 don't match this target), and GDB's internal cache (wrong cache
2411 for this target). */
2412 if (target_read (ops
, TARGET_OBJECT_RAW_MEMORY
, NULL
, buf
, addr
, len
)
2414 memory_error (TARGET_XFER_E_IO
, addr
);
2418 get_target_memory_unsigned (struct target_ops
*ops
, CORE_ADDR addr
,
2419 int len
, enum bfd_endian byte_order
)
2421 gdb_byte buf
[sizeof (ULONGEST
)];
2423 gdb_assert (len
<= sizeof (buf
));
2424 get_target_memory (ops
, addr
, buf
, len
);
2425 return extract_unsigned_integer (buf
, len
, byte_order
);
2431 target_insert_breakpoint (struct gdbarch
*gdbarch
,
2432 struct bp_target_info
*bp_tgt
)
2434 if (!may_insert_breakpoints
)
2436 warning (_("May not insert breakpoints"));
2440 return current_target
.to_insert_breakpoint (¤t_target
,
2447 target_remove_breakpoint (struct gdbarch
*gdbarch
,
2448 struct bp_target_info
*bp_tgt
)
2450 /* This is kind of a weird case to handle, but the permission might
2451 have been changed after breakpoints were inserted - in which case
2452 we should just take the user literally and assume that any
2453 breakpoints should be left in place. */
2454 if (!may_insert_breakpoints
)
2456 warning (_("May not remove breakpoints"));
2460 return current_target
.to_remove_breakpoint (¤t_target
,
2465 target_info (char *args
, int from_tty
)
2467 struct target_ops
*t
;
2468 int has_all_mem
= 0;
2470 if (symfile_objfile
!= NULL
)
2471 printf_unfiltered (_("Symbols from \"%s\".\n"),
2472 objfile_name (symfile_objfile
));
2474 for (t
= target_stack
; t
!= NULL
; t
= t
->beneath
)
2476 if (!(*t
->to_has_memory
) (t
))
2479 if ((int) (t
->to_stratum
) <= (int) dummy_stratum
)
2482 printf_unfiltered (_("\tWhile running this, "
2483 "GDB does not access memory from...\n"));
2484 printf_unfiltered ("%s:\n", t
->to_longname
);
2485 (t
->to_files_info
) (t
);
2486 has_all_mem
= (*t
->to_has_all_memory
) (t
);
2490 /* This function is called before any new inferior is created, e.g.
2491 by running a program, attaching, or connecting to a target.
2492 It cleans up any state from previous invocations which might
2493 change between runs. This is a subset of what target_preopen
2494 resets (things which might change between targets). */
2497 target_pre_inferior (int from_tty
)
2499 /* Clear out solib state. Otherwise the solib state of the previous
2500 inferior might have survived and is entirely wrong for the new
2501 target. This has been observed on GNU/Linux using glibc 2.3. How
2513 Cannot access memory at address 0xdeadbeef
2516 /* In some OSs, the shared library list is the same/global/shared
2517 across inferiors. If code is shared between processes, so are
2518 memory regions and features. */
2519 if (!gdbarch_has_global_solist (target_gdbarch ()))
2521 no_shared_libraries (NULL
, from_tty
);
2523 invalidate_target_mem_regions ();
2525 target_clear_description ();
2528 agent_capability_invalidate ();
2531 /* Callback for iterate_over_inferiors. Gets rid of the given
2535 dispose_inferior (struct inferior
*inf
, void *args
)
2537 struct thread_info
*thread
;
2539 thread
= any_thread_of_process (inf
->pid
);
2542 switch_to_thread (thread
->ptid
);
2544 /* Core inferiors actually should be detached, not killed. */
2545 if (target_has_execution
)
2548 target_detach (NULL
, 0);
2554 /* This is to be called by the open routine before it does
2558 target_preopen (int from_tty
)
2562 if (have_inferiors ())
2565 || !have_live_inferiors ()
2566 || query (_("A program is being debugged already. Kill it? ")))
2567 iterate_over_inferiors (dispose_inferior
, NULL
);
2569 error (_("Program not killed."));
2572 /* Calling target_kill may remove the target from the stack. But if
2573 it doesn't (which seems like a win for UDI), remove it now. */
2574 /* Leave the exec target, though. The user may be switching from a
2575 live process to a core of the same program. */
2576 pop_all_targets_above (file_stratum
);
2578 target_pre_inferior (from_tty
);
2581 /* Detach a target after doing deferred register stores. */
2584 target_detach (const char *args
, int from_tty
)
2586 struct target_ops
* t
;
2588 if (gdbarch_has_global_breakpoints (target_gdbarch ()))
2589 /* Don't remove global breakpoints here. They're removed on
2590 disconnection from the target. */
2593 /* If we're in breakpoints-always-inserted mode, have to remove
2594 them before detaching. */
2595 remove_breakpoints_pid (ptid_get_pid (inferior_ptid
));
2597 prepare_for_detach ();
2599 current_target
.to_detach (¤t_target
, args
, from_tty
);
2601 fprintf_unfiltered (gdb_stdlog
, "target_detach (%s, %d)\n",
2606 target_disconnect (char *args
, int from_tty
)
2608 struct target_ops
*t
;
2610 /* If we're in breakpoints-always-inserted mode or if breakpoints
2611 are global across processes, we have to remove them before
2613 remove_breakpoints ();
2615 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2616 if (t
->to_disconnect
!= NULL
)
2619 fprintf_unfiltered (gdb_stdlog
, "target_disconnect (%s, %d)\n",
2621 t
->to_disconnect (t
, args
, from_tty
);
2629 target_wait (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
2631 struct target_ops
*t
;
2632 ptid_t retval
= (current_target
.to_wait
) (¤t_target
, ptid
,
2637 char *status_string
;
2638 char *options_string
;
2640 status_string
= target_waitstatus_to_string (status
);
2641 options_string
= target_options_to_string (options
);
2642 fprintf_unfiltered (gdb_stdlog
,
2643 "target_wait (%d, status, options={%s})"
2645 ptid_get_pid (ptid
), options_string
,
2646 ptid_get_pid (retval
), status_string
);
2647 xfree (status_string
);
2648 xfree (options_string
);
2655 target_pid_to_str (ptid_t ptid
)
2657 struct target_ops
*t
;
2659 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2661 if (t
->to_pid_to_str
!= NULL
)
2662 return (*t
->to_pid_to_str
) (t
, ptid
);
2665 return normal_pid_to_str (ptid
);
2669 target_thread_name (struct thread_info
*info
)
2671 return current_target
.to_thread_name (¤t_target
, info
);
2675 target_resume (ptid_t ptid
, int step
, enum gdb_signal signal
)
2677 struct target_ops
*t
;
2679 target_dcache_invalidate ();
2681 current_target
.to_resume (¤t_target
, ptid
, step
, signal
);
2683 fprintf_unfiltered (gdb_stdlog
, "target_resume (%d, %s, %s)\n",
2684 ptid_get_pid (ptid
),
2685 step
? "step" : "continue",
2686 gdb_signal_to_name (signal
));
2688 registers_changed_ptid (ptid
);
2689 set_executing (ptid
, 1);
2690 set_running (ptid
, 1);
2691 clear_inline_frame_state (ptid
);
2695 target_pass_signals (int numsigs
, unsigned char *pass_signals
)
2697 struct target_ops
*t
;
2699 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2701 if (t
->to_pass_signals
!= NULL
)
2707 fprintf_unfiltered (gdb_stdlog
, "target_pass_signals (%d, {",
2710 for (i
= 0; i
< numsigs
; i
++)
2711 if (pass_signals
[i
])
2712 fprintf_unfiltered (gdb_stdlog
, " %s",
2713 gdb_signal_to_name (i
));
2715 fprintf_unfiltered (gdb_stdlog
, " })\n");
2718 (*t
->to_pass_signals
) (t
, numsigs
, pass_signals
);
2725 target_program_signals (int numsigs
, unsigned char *program_signals
)
2727 struct target_ops
*t
;
2729 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2731 if (t
->to_program_signals
!= NULL
)
2737 fprintf_unfiltered (gdb_stdlog
, "target_program_signals (%d, {",
2740 for (i
= 0; i
< numsigs
; i
++)
2741 if (program_signals
[i
])
2742 fprintf_unfiltered (gdb_stdlog
, " %s",
2743 gdb_signal_to_name (i
));
2745 fprintf_unfiltered (gdb_stdlog
, " })\n");
2748 (*t
->to_program_signals
) (t
, numsigs
, program_signals
);
2754 /* Look through the list of possible targets for a target that can
2758 target_follow_fork (int follow_child
, int detach_fork
)
2760 struct target_ops
*t
;
2762 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2764 if (t
->to_follow_fork
!= NULL
)
2766 int retval
= t
->to_follow_fork (t
, follow_child
, detach_fork
);
2769 fprintf_unfiltered (gdb_stdlog
,
2770 "target_follow_fork (%d, %d) = %d\n",
2771 follow_child
, detach_fork
, retval
);
2776 /* Some target returned a fork event, but did not know how to follow it. */
2777 internal_error (__FILE__
, __LINE__
,
2778 _("could not find a target to follow fork"));
2782 target_mourn_inferior (void)
2784 struct target_ops
*t
;
2786 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2788 if (t
->to_mourn_inferior
!= NULL
)
2790 t
->to_mourn_inferior (t
);
2792 fprintf_unfiltered (gdb_stdlog
, "target_mourn_inferior ()\n");
2794 /* We no longer need to keep handles on any of the object files.
2795 Make sure to release them to avoid unnecessarily locking any
2796 of them while we're not actually debugging. */
2797 bfd_cache_close_all ();
2803 internal_error (__FILE__
, __LINE__
,
2804 _("could not find a target to follow mourn inferior"));
2807 /* Look for a target which can describe architectural features, starting
2808 from TARGET. If we find one, return its description. */
2810 const struct target_desc
*
2811 target_read_description (struct target_ops
*target
)
2813 struct target_ops
*t
;
2815 for (t
= target
; t
!= NULL
; t
= t
->beneath
)
2816 if (t
->to_read_description
!= NULL
)
2818 const struct target_desc
*tdesc
;
2820 tdesc
= t
->to_read_description (t
);
2828 /* The default implementation of to_search_memory.
2829 This implements a basic search of memory, reading target memory and
2830 performing the search here (as opposed to performing the search in on the
2831 target side with, for example, gdbserver). */
2834 simple_search_memory (struct target_ops
*ops
,
2835 CORE_ADDR start_addr
, ULONGEST search_space_len
,
2836 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2837 CORE_ADDR
*found_addrp
)
2839 /* NOTE: also defined in find.c testcase. */
2840 #define SEARCH_CHUNK_SIZE 16000
2841 const unsigned chunk_size
= SEARCH_CHUNK_SIZE
;
2842 /* Buffer to hold memory contents for searching. */
2843 gdb_byte
*search_buf
;
2844 unsigned search_buf_size
;
2845 struct cleanup
*old_cleanups
;
2847 search_buf_size
= chunk_size
+ pattern_len
- 1;
2849 /* No point in trying to allocate a buffer larger than the search space. */
2850 if (search_space_len
< search_buf_size
)
2851 search_buf_size
= search_space_len
;
2853 search_buf
= malloc (search_buf_size
);
2854 if (search_buf
== NULL
)
2855 error (_("Unable to allocate memory to perform the search."));
2856 old_cleanups
= make_cleanup (free_current_contents
, &search_buf
);
2858 /* Prime the search buffer. */
2860 if (target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2861 search_buf
, start_addr
, search_buf_size
) != search_buf_size
)
2863 warning (_("Unable to access %s bytes of target "
2864 "memory at %s, halting search."),
2865 pulongest (search_buf_size
), hex_string (start_addr
));
2866 do_cleanups (old_cleanups
);
2870 /* Perform the search.
2872 The loop is kept simple by allocating [N + pattern-length - 1] bytes.
2873 When we've scanned N bytes we copy the trailing bytes to the start and
2874 read in another N bytes. */
2876 while (search_space_len
>= pattern_len
)
2878 gdb_byte
*found_ptr
;
2879 unsigned nr_search_bytes
= min (search_space_len
, search_buf_size
);
2881 found_ptr
= memmem (search_buf
, nr_search_bytes
,
2882 pattern
, pattern_len
);
2884 if (found_ptr
!= NULL
)
2886 CORE_ADDR found_addr
= start_addr
+ (found_ptr
- search_buf
);
2888 *found_addrp
= found_addr
;
2889 do_cleanups (old_cleanups
);
2893 /* Not found in this chunk, skip to next chunk. */
2895 /* Don't let search_space_len wrap here, it's unsigned. */
2896 if (search_space_len
>= chunk_size
)
2897 search_space_len
-= chunk_size
;
2899 search_space_len
= 0;
2901 if (search_space_len
>= pattern_len
)
2903 unsigned keep_len
= search_buf_size
- chunk_size
;
2904 CORE_ADDR read_addr
= start_addr
+ chunk_size
+ keep_len
;
2907 /* Copy the trailing part of the previous iteration to the front
2908 of the buffer for the next iteration. */
2909 gdb_assert (keep_len
== pattern_len
- 1);
2910 memcpy (search_buf
, search_buf
+ chunk_size
, keep_len
);
2912 nr_to_read
= min (search_space_len
- keep_len
, chunk_size
);
2914 if (target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2915 search_buf
+ keep_len
, read_addr
,
2916 nr_to_read
) != nr_to_read
)
2918 warning (_("Unable to access %s bytes of target "
2919 "memory at %s, halting search."),
2920 plongest (nr_to_read
),
2921 hex_string (read_addr
));
2922 do_cleanups (old_cleanups
);
2926 start_addr
+= chunk_size
;
2932 do_cleanups (old_cleanups
);
2936 /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the
2937 sequence of bytes in PATTERN with length PATTERN_LEN.
2939 The result is 1 if found, 0 if not found, and -1 if there was an error
2940 requiring halting of the search (e.g. memory read error).
2941 If the pattern is found the address is recorded in FOUND_ADDRP. */
2944 target_search_memory (CORE_ADDR start_addr
, ULONGEST search_space_len
,
2945 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2946 CORE_ADDR
*found_addrp
)
2948 struct target_ops
*t
;
2951 /* We don't use INHERIT to set current_target.to_search_memory,
2952 so we have to scan the target stack and handle targetdebug
2956 fprintf_unfiltered (gdb_stdlog
, "target_search_memory (%s, ...)\n",
2957 hex_string (start_addr
));
2959 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2960 if (t
->to_search_memory
!= NULL
)
2965 found
= t
->to_search_memory (t
, start_addr
, search_space_len
,
2966 pattern
, pattern_len
, found_addrp
);
2970 /* If a special version of to_search_memory isn't available, use the
2972 found
= simple_search_memory (current_target
.beneath
,
2973 start_addr
, search_space_len
,
2974 pattern
, pattern_len
, found_addrp
);
2978 fprintf_unfiltered (gdb_stdlog
, " = %d\n", found
);
2983 /* Look through the currently pushed targets. If none of them will
2984 be able to restart the currently running process, issue an error
2988 target_require_runnable (void)
2990 struct target_ops
*t
;
2992 for (t
= target_stack
; t
!= NULL
; t
= t
->beneath
)
2994 /* If this target knows how to create a new program, then
2995 assume we will still be able to after killing the current
2996 one. Either killing and mourning will not pop T, or else
2997 find_default_run_target will find it again. */
2998 if (t
->to_create_inferior
!= NULL
)
3001 /* Do not worry about thread_stratum targets that can not
3002 create inferiors. Assume they will be pushed again if
3003 necessary, and continue to the process_stratum. */
3004 if (t
->to_stratum
== thread_stratum
3005 || t
->to_stratum
== arch_stratum
)
3008 error (_("The \"%s\" target does not support \"run\". "
3009 "Try \"help target\" or \"continue\"."),
3013 /* This function is only called if the target is running. In that
3014 case there should have been a process_stratum target and it
3015 should either know how to create inferiors, or not... */
3016 internal_error (__FILE__
, __LINE__
, _("No targets found"));
3019 /* Look through the list of possible targets for a target that can
3020 execute a run or attach command without any other data. This is
3021 used to locate the default process stratum.
3023 If DO_MESG is not NULL, the result is always valid (error() is
3024 called for errors); else, return NULL on error. */
3026 static struct target_ops
*
3027 find_default_run_target (char *do_mesg
)
3029 struct target_ops
**t
;
3030 struct target_ops
*runable
= NULL
;
3035 for (t
= target_structs
; t
< target_structs
+ target_struct_size
;
3038 if ((*t
)->to_can_run
&& target_can_run (*t
))
3048 error (_("Don't know how to %s. Try \"help target\"."), do_mesg
);
3057 find_default_attach (struct target_ops
*ops
, char *args
, int from_tty
)
3059 struct target_ops
*t
;
3061 t
= find_default_run_target ("attach");
3062 (t
->to_attach
) (t
, args
, from_tty
);
3067 find_default_create_inferior (struct target_ops
*ops
,
3068 char *exec_file
, char *allargs
, char **env
,
3071 struct target_ops
*t
;
3073 t
= find_default_run_target ("run");
3074 (t
->to_create_inferior
) (t
, exec_file
, allargs
, env
, from_tty
);
3079 find_default_can_async_p (struct target_ops
*ignore
)
3081 struct target_ops
*t
;
3083 /* This may be called before the target is pushed on the stack;
3084 look for the default process stratum. If there's none, gdb isn't
3085 configured with a native debugger, and target remote isn't
3087 t
= find_default_run_target (NULL
);
3088 if (t
&& t
->to_can_async_p
!= delegate_can_async_p
)
3089 return (t
->to_can_async_p
) (t
);
3094 find_default_is_async_p (struct target_ops
*ignore
)
3096 struct target_ops
*t
;
3098 /* This may be called before the target is pushed on the stack;
3099 look for the default process stratum. If there's none, gdb isn't
3100 configured with a native debugger, and target remote isn't
3102 t
= find_default_run_target (NULL
);
3103 if (t
&& t
->to_is_async_p
!= delegate_is_async_p
)
3104 return (t
->to_is_async_p
) (t
);
3109 find_default_supports_non_stop (struct target_ops
*self
)
3111 struct target_ops
*t
;
3113 t
= find_default_run_target (NULL
);
3114 if (t
&& t
->to_supports_non_stop
)
3115 return (t
->to_supports_non_stop
) (t
);
3120 target_supports_non_stop (void)
3122 struct target_ops
*t
;
3124 for (t
= ¤t_target
; t
!= NULL
; t
= t
->beneath
)
3125 if (t
->to_supports_non_stop
)
3126 return t
->to_supports_non_stop (t
);
3131 /* Implement the "info proc" command. */
3134 target_info_proc (char *args
, enum info_proc_what what
)
3136 struct target_ops
*t
;
3138 /* If we're already connected to something that can get us OS
3139 related data, use it. Otherwise, try using the native
3141 if (current_target
.to_stratum
>= process_stratum
)
3142 t
= current_target
.beneath
;
3144 t
= find_default_run_target (NULL
);
3146 for (; t
!= NULL
; t
= t
->beneath
)
3148 if (t
->to_info_proc
!= NULL
)
3150 t
->to_info_proc (t
, args
, what
);
3153 fprintf_unfiltered (gdb_stdlog
,
3154 "target_info_proc (\"%s\", %d)\n", args
, what
);
3164 find_default_supports_disable_randomization (struct target_ops
*self
)
3166 struct target_ops
*t
;
3168 t
= find_default_run_target (NULL
);
3169 if (t
&& t
->to_supports_disable_randomization
)
3170 return (t
->to_supports_disable_randomization
) (t
);
3175 target_supports_disable_randomization (void)
3177 struct target_ops
*t
;
3179 for (t
= ¤t_target
; t
!= NULL
; t
= t
->beneath
)
3180 if (t
->to_supports_disable_randomization
)
3181 return t
->to_supports_disable_randomization (t
);
3187 target_get_osdata (const char *type
)
3189 struct target_ops
*t
;
3191 /* If we're already connected to something that can get us OS
3192 related data, use it. Otherwise, try using the native
3194 if (current_target
.to_stratum
>= process_stratum
)
3195 t
= current_target
.beneath
;
3197 t
= find_default_run_target ("get OS data");
3202 return target_read_stralloc (t
, TARGET_OBJECT_OSDATA
, type
);
3205 /* Determine the current address space of thread PTID. */
3207 struct address_space
*
3208 target_thread_address_space (ptid_t ptid
)
3210 struct address_space
*aspace
;
3211 struct inferior
*inf
;
3212 struct target_ops
*t
;
3214 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3216 if (t
->to_thread_address_space
!= NULL
)
3218 aspace
= t
->to_thread_address_space (t
, ptid
);
3219 gdb_assert (aspace
);
3222 fprintf_unfiltered (gdb_stdlog
,
3223 "target_thread_address_space (%s) = %d\n",
3224 target_pid_to_str (ptid
),
3225 address_space_num (aspace
));
3230 /* Fall-back to the "main" address space of the inferior. */
3231 inf
= find_inferior_pid (ptid_get_pid (ptid
));
3233 if (inf
== NULL
|| inf
->aspace
== NULL
)
3234 internal_error (__FILE__
, __LINE__
,
3235 _("Can't determine the current "
3236 "address space of thread %s\n"),
3237 target_pid_to_str (ptid
));
3243 /* Target file operations. */
3245 static struct target_ops
*
3246 default_fileio_target (void)
3248 /* If we're already connected to something that can perform
3249 file I/O, use it. Otherwise, try using the native target. */
3250 if (current_target
.to_stratum
>= process_stratum
)
3251 return current_target
.beneath
;
3253 return find_default_run_target ("file I/O");
3256 /* Open FILENAME on the target, using FLAGS and MODE. Return a
3257 target file descriptor, or -1 if an error occurs (and set
3260 target_fileio_open (const char *filename
, int flags
, int mode
,
3263 struct target_ops
*t
;
3265 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
3267 if (t
->to_fileio_open
!= NULL
)
3269 int fd
= t
->to_fileio_open (t
, filename
, flags
, mode
, target_errno
);
3272 fprintf_unfiltered (gdb_stdlog
,
3273 "target_fileio_open (%s,0x%x,0%o) = %d (%d)\n",
3274 filename
, flags
, mode
,
3275 fd
, fd
!= -1 ? 0 : *target_errno
);
3280 *target_errno
= FILEIO_ENOSYS
;
3284 /* Write up to LEN bytes from WRITE_BUF to FD on the target.
3285 Return the number of bytes written, or -1 if an error occurs
3286 (and set *TARGET_ERRNO). */
3288 target_fileio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
3289 ULONGEST offset
, int *target_errno
)
3291 struct target_ops
*t
;
3293 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
3295 if (t
->to_fileio_pwrite
!= NULL
)
3297 int ret
= t
->to_fileio_pwrite (t
, fd
, write_buf
, len
, offset
,
3301 fprintf_unfiltered (gdb_stdlog
,
3302 "target_fileio_pwrite (%d,...,%d,%s) "
3304 fd
, len
, pulongest (offset
),
3305 ret
, ret
!= -1 ? 0 : *target_errno
);
3310 *target_errno
= FILEIO_ENOSYS
;
3314 /* Read up to LEN bytes FD on the target into READ_BUF.
3315 Return the number of bytes read, or -1 if an error occurs
3316 (and set *TARGET_ERRNO). */
3318 target_fileio_pread (int fd
, gdb_byte
*read_buf
, int len
,
3319 ULONGEST offset
, int *target_errno
)
3321 struct target_ops
*t
;
3323 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
3325 if (t
->to_fileio_pread
!= NULL
)
3327 int ret
= t
->to_fileio_pread (t
, fd
, read_buf
, len
, offset
,
3331 fprintf_unfiltered (gdb_stdlog
,
3332 "target_fileio_pread (%d,...,%d,%s) "
3334 fd
, len
, pulongest (offset
),
3335 ret
, ret
!= -1 ? 0 : *target_errno
);
3340 *target_errno
= FILEIO_ENOSYS
;
3344 /* Close FD on the target. Return 0, or -1 if an error occurs
3345 (and set *TARGET_ERRNO). */
3347 target_fileio_close (int fd
, int *target_errno
)
3349 struct target_ops
*t
;
3351 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
3353 if (t
->to_fileio_close
!= NULL
)
3355 int ret
= t
->to_fileio_close (t
, fd
, target_errno
);
3358 fprintf_unfiltered (gdb_stdlog
,
3359 "target_fileio_close (%d) = %d (%d)\n",
3360 fd
, ret
, ret
!= -1 ? 0 : *target_errno
);
3365 *target_errno
= FILEIO_ENOSYS
;
3369 /* Unlink FILENAME on the target. Return 0, or -1 if an error
3370 occurs (and set *TARGET_ERRNO). */
3372 target_fileio_unlink (const char *filename
, int *target_errno
)
3374 struct target_ops
*t
;
3376 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
3378 if (t
->to_fileio_unlink
!= NULL
)
3380 int ret
= t
->to_fileio_unlink (t
, filename
, target_errno
);
3383 fprintf_unfiltered (gdb_stdlog
,
3384 "target_fileio_unlink (%s) = %d (%d)\n",
3385 filename
, ret
, ret
!= -1 ? 0 : *target_errno
);
3390 *target_errno
= FILEIO_ENOSYS
;
3394 /* Read value of symbolic link FILENAME on the target. Return a
3395 null-terminated string allocated via xmalloc, or NULL if an error
3396 occurs (and set *TARGET_ERRNO). */
3398 target_fileio_readlink (const char *filename
, int *target_errno
)
3400 struct target_ops
*t
;
3402 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
3404 if (t
->to_fileio_readlink
!= NULL
)
3406 char *ret
= t
->to_fileio_readlink (t
, filename
, target_errno
);
3409 fprintf_unfiltered (gdb_stdlog
,
3410 "target_fileio_readlink (%s) = %s (%d)\n",
3411 filename
, ret
? ret
: "(nil)",
3412 ret
? 0 : *target_errno
);
3417 *target_errno
= FILEIO_ENOSYS
;
3422 target_fileio_close_cleanup (void *opaque
)
3424 int fd
= *(int *) opaque
;
3427 target_fileio_close (fd
, &target_errno
);
3430 /* Read target file FILENAME. Store the result in *BUF_P and
3431 return the size of the transferred data. PADDING additional bytes are
3432 available in *BUF_P. This is a helper function for
3433 target_fileio_read_alloc; see the declaration of that function for more
3437 target_fileio_read_alloc_1 (const char *filename
,
3438 gdb_byte
**buf_p
, int padding
)
3440 struct cleanup
*close_cleanup
;
3441 size_t buf_alloc
, buf_pos
;
3447 fd
= target_fileio_open (filename
, FILEIO_O_RDONLY
, 0700, &target_errno
);
3451 close_cleanup
= make_cleanup (target_fileio_close_cleanup
, &fd
);
3453 /* Start by reading up to 4K at a time. The target will throttle
3454 this number down if necessary. */
3456 buf
= xmalloc (buf_alloc
);
3460 n
= target_fileio_pread (fd
, &buf
[buf_pos
],
3461 buf_alloc
- buf_pos
- padding
, buf_pos
,
3465 /* An error occurred. */
3466 do_cleanups (close_cleanup
);
3472 /* Read all there was. */
3473 do_cleanups (close_cleanup
);
3483 /* If the buffer is filling up, expand it. */
3484 if (buf_alloc
< buf_pos
* 2)
3487 buf
= xrealloc (buf
, buf_alloc
);
3494 /* Read target file FILENAME. Store the result in *BUF_P and return
3495 the size of the transferred data. See the declaration in "target.h"
3496 function for more information about the return value. */
3499 target_fileio_read_alloc (const char *filename
, gdb_byte
**buf_p
)
3501 return target_fileio_read_alloc_1 (filename
, buf_p
, 0);
3504 /* Read target file FILENAME. The result is NUL-terminated and
3505 returned as a string, allocated using xmalloc. If an error occurs
3506 or the transfer is unsupported, NULL is returned. Empty objects
3507 are returned as allocated but empty strings. A warning is issued
3508 if the result contains any embedded NUL bytes. */
3511 target_fileio_read_stralloc (const char *filename
)
3515 LONGEST i
, transferred
;
3517 transferred
= target_fileio_read_alloc_1 (filename
, &buffer
, 1);
3518 bufstr
= (char *) buffer
;
3520 if (transferred
< 0)
3523 if (transferred
== 0)
3524 return xstrdup ("");
3526 bufstr
[transferred
] = 0;
3528 /* Check for embedded NUL bytes; but allow trailing NULs. */
3529 for (i
= strlen (bufstr
); i
< transferred
; i
++)
3532 warning (_("target file %s "
3533 "contained unexpected null characters"),
3543 default_region_ok_for_hw_watchpoint (struct target_ops
*self
,
3544 CORE_ADDR addr
, int len
)
3546 return (len
<= gdbarch_ptr_bit (target_gdbarch ()) / TARGET_CHAR_BIT
);
3550 default_watchpoint_addr_within_range (struct target_ops
*target
,
3552 CORE_ADDR start
, int length
)
3554 return addr
>= start
&& addr
< start
+ length
;
3557 static struct gdbarch
*
3558 default_thread_architecture (struct target_ops
*ops
, ptid_t ptid
)
3560 return target_gdbarch ();
3570 return_minus_one (void)
3582 * Find the next target down the stack from the specified target.
3586 find_target_beneath (struct target_ops
*t
)
3594 find_target_at (enum strata stratum
)
3596 struct target_ops
*t
;
3598 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3599 if (t
->to_stratum
== stratum
)
3606 /* The inferior process has died. Long live the inferior! */
3609 generic_mourn_inferior (void)
3613 ptid
= inferior_ptid
;
3614 inferior_ptid
= null_ptid
;
3616 /* Mark breakpoints uninserted in case something tries to delete a
3617 breakpoint while we delete the inferior's threads (which would
3618 fail, since the inferior is long gone). */
3619 mark_breakpoints_out ();
3621 if (!ptid_equal (ptid
, null_ptid
))
3623 int pid
= ptid_get_pid (ptid
);
3624 exit_inferior (pid
);
3627 /* Note this wipes step-resume breakpoints, so needs to be done
3628 after exit_inferior, which ends up referencing the step-resume
3629 breakpoints through clear_thread_inferior_resources. */
3630 breakpoint_init_inferior (inf_exited
);
3632 registers_changed ();
3634 reopen_exec_file ();
3635 reinit_frame_cache ();
3637 if (deprecated_detach_hook
)
3638 deprecated_detach_hook ();
3641 /* Convert a normal process ID to a string. Returns the string in a
3645 normal_pid_to_str (ptid_t ptid
)
3647 static char buf
[32];
3649 xsnprintf (buf
, sizeof buf
, "process %d", ptid_get_pid (ptid
));
3654 dummy_pid_to_str (struct target_ops
*ops
, ptid_t ptid
)
3656 return normal_pid_to_str (ptid
);
3659 /* Error-catcher for target_find_memory_regions. */
3661 dummy_find_memory_regions (struct target_ops
*self
,
3662 find_memory_region_ftype ignore1
, void *ignore2
)
3664 error (_("Command not implemented for this target."));
3668 /* Error-catcher for target_make_corefile_notes. */
3670 dummy_make_corefile_notes (struct target_ops
*self
,
3671 bfd
*ignore1
, int *ignore2
)
3673 error (_("Command not implemented for this target."));
3677 /* Set up the handful of non-empty slots needed by the dummy target
3681 init_dummy_target (void)
3683 dummy_target
.to_shortname
= "None";
3684 dummy_target
.to_longname
= "None";
3685 dummy_target
.to_doc
= "";
3686 dummy_target
.to_create_inferior
= find_default_create_inferior
;
3687 dummy_target
.to_supports_non_stop
= find_default_supports_non_stop
;
3688 dummy_target
.to_supports_disable_randomization
3689 = find_default_supports_disable_randomization
;
3690 dummy_target
.to_pid_to_str
= dummy_pid_to_str
;
3691 dummy_target
.to_stratum
= dummy_stratum
;
3692 dummy_target
.to_has_all_memory
= (int (*) (struct target_ops
*)) return_zero
;
3693 dummy_target
.to_has_memory
= (int (*) (struct target_ops
*)) return_zero
;
3694 dummy_target
.to_has_stack
= (int (*) (struct target_ops
*)) return_zero
;
3695 dummy_target
.to_has_registers
= (int (*) (struct target_ops
*)) return_zero
;
3696 dummy_target
.to_has_execution
3697 = (int (*) (struct target_ops
*, ptid_t
)) return_zero
;
3698 dummy_target
.to_magic
= OPS_MAGIC
;
3700 install_dummy_methods (&dummy_target
);
3704 debug_to_open (char *args
, int from_tty
)
3706 debug_target
.to_open (args
, from_tty
);
3708 fprintf_unfiltered (gdb_stdlog
, "target_open (%s, %d)\n", args
, from_tty
);
3712 target_close (struct target_ops
*targ
)
3714 gdb_assert (!target_is_pushed (targ
));
3716 if (targ
->to_xclose
!= NULL
)
3717 targ
->to_xclose (targ
);
3718 else if (targ
->to_close
!= NULL
)
3719 targ
->to_close (targ
);
3722 fprintf_unfiltered (gdb_stdlog
, "target_close ()\n");
3726 target_attach (char *args
, int from_tty
)
3728 current_target
.to_attach (¤t_target
, args
, from_tty
);
3730 fprintf_unfiltered (gdb_stdlog
, "target_attach (%s, %d)\n",
3735 target_thread_alive (ptid_t ptid
)
3737 struct target_ops
*t
;
3739 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3741 if (t
->to_thread_alive
!= NULL
)
3745 retval
= t
->to_thread_alive (t
, ptid
);
3747 fprintf_unfiltered (gdb_stdlog
, "target_thread_alive (%d) = %d\n",
3748 ptid_get_pid (ptid
), retval
);
3758 target_find_new_threads (void)
3760 struct target_ops
*t
;
3762 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3764 if (t
->to_find_new_threads
!= NULL
)
3766 t
->to_find_new_threads (t
);
3768 fprintf_unfiltered (gdb_stdlog
, "target_find_new_threads ()\n");
3776 target_stop (ptid_t ptid
)
3780 warning (_("May not interrupt or stop the target, ignoring attempt"));
3784 (*current_target
.to_stop
) (¤t_target
, ptid
);
3788 debug_to_post_attach (struct target_ops
*self
, int pid
)
3790 debug_target
.to_post_attach (&debug_target
, pid
);
3792 fprintf_unfiltered (gdb_stdlog
, "target_post_attach (%d)\n", pid
);
3795 /* Concatenate ELEM to LIST, a comma separate list, and return the
3796 result. The LIST incoming argument is released. */
3799 str_comma_list_concat_elem (char *list
, const char *elem
)
3802 return xstrdup (elem
);
3804 return reconcat (list
, list
, ", ", elem
, (char *) NULL
);
3807 /* Helper for target_options_to_string. If OPT is present in
3808 TARGET_OPTIONS, append the OPT_STR (string version of OPT) in RET.
3809 Returns the new resulting string. OPT is removed from
3813 do_option (int *target_options
, char *ret
,
3814 int opt
, char *opt_str
)
3816 if ((*target_options
& opt
) != 0)
3818 ret
= str_comma_list_concat_elem (ret
, opt_str
);
3819 *target_options
&= ~opt
;
3826 target_options_to_string (int target_options
)
3830 #define DO_TARG_OPTION(OPT) \
3831 ret = do_option (&target_options, ret, OPT, #OPT)
3833 DO_TARG_OPTION (TARGET_WNOHANG
);
3835 if (target_options
!= 0)
3836 ret
= str_comma_list_concat_elem (ret
, "unknown???");
3844 debug_print_register (const char * func
,
3845 struct regcache
*regcache
, int regno
)
3847 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
3849 fprintf_unfiltered (gdb_stdlog
, "%s ", func
);
3850 if (regno
>= 0 && regno
< gdbarch_num_regs (gdbarch
)
3851 && gdbarch_register_name (gdbarch
, regno
) != NULL
3852 && gdbarch_register_name (gdbarch
, regno
)[0] != '\0')
3853 fprintf_unfiltered (gdb_stdlog
, "(%s)",
3854 gdbarch_register_name (gdbarch
, regno
));
3856 fprintf_unfiltered (gdb_stdlog
, "(%d)", regno
);
3857 if (regno
>= 0 && regno
< gdbarch_num_regs (gdbarch
))
3859 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
3860 int i
, size
= register_size (gdbarch
, regno
);
3861 gdb_byte buf
[MAX_REGISTER_SIZE
];
3863 regcache_raw_collect (regcache
, regno
, buf
);
3864 fprintf_unfiltered (gdb_stdlog
, " = ");
3865 for (i
= 0; i
< size
; i
++)
3867 fprintf_unfiltered (gdb_stdlog
, "%02x", buf
[i
]);
3869 if (size
<= sizeof (LONGEST
))
3871 ULONGEST val
= extract_unsigned_integer (buf
, size
, byte_order
);
3873 fprintf_unfiltered (gdb_stdlog
, " %s %s",
3874 core_addr_to_string_nz (val
), plongest (val
));
3877 fprintf_unfiltered (gdb_stdlog
, "\n");
3881 target_fetch_registers (struct regcache
*regcache
, int regno
)
3883 struct target_ops
*t
;
3885 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3887 if (t
->to_fetch_registers
!= NULL
)
3889 t
->to_fetch_registers (t
, regcache
, regno
);
3891 debug_print_register ("target_fetch_registers", regcache
, regno
);
3898 target_store_registers (struct regcache
*regcache
, int regno
)
3900 struct target_ops
*t
;
3902 if (!may_write_registers
)
3903 error (_("Writing to registers is not allowed (regno %d)"), regno
);
3905 current_target
.to_store_registers (¤t_target
, regcache
, regno
);
3908 debug_print_register ("target_store_registers", regcache
, regno
);
3913 target_core_of_thread (ptid_t ptid
)
3915 struct target_ops
*t
;
3917 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3919 if (t
->to_core_of_thread
!= NULL
)
3921 int retval
= t
->to_core_of_thread (t
, ptid
);
3924 fprintf_unfiltered (gdb_stdlog
,
3925 "target_core_of_thread (%d) = %d\n",
3926 ptid_get_pid (ptid
), retval
);
3935 target_verify_memory (const gdb_byte
*data
, CORE_ADDR memaddr
, ULONGEST size
)
3937 struct target_ops
*t
;
3939 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3941 if (t
->to_verify_memory
!= NULL
)
3943 int retval
= t
->to_verify_memory (t
, data
, memaddr
, size
);
3946 fprintf_unfiltered (gdb_stdlog
,
3947 "target_verify_memory (%s, %s) = %d\n",
3948 paddress (target_gdbarch (), memaddr
),
3958 /* The documentation for this function is in its prototype declaration in
3962 target_insert_mask_watchpoint (CORE_ADDR addr
, CORE_ADDR mask
, int rw
)
3964 struct target_ops
*t
;
3966 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3967 if (t
->to_insert_mask_watchpoint
!= NULL
)
3971 ret
= t
->to_insert_mask_watchpoint (t
, addr
, mask
, rw
);
3974 fprintf_unfiltered (gdb_stdlog
, "\
3975 target_insert_mask_watchpoint (%s, %s, %d) = %d\n",
3976 core_addr_to_string (addr
),
3977 core_addr_to_string (mask
), rw
, ret
);
3985 /* The documentation for this function is in its prototype declaration in
3989 target_remove_mask_watchpoint (CORE_ADDR addr
, CORE_ADDR mask
, int rw
)
3991 struct target_ops
*t
;
3993 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3994 if (t
->to_remove_mask_watchpoint
!= NULL
)
3998 ret
= t
->to_remove_mask_watchpoint (t
, addr
, mask
, rw
);
4001 fprintf_unfiltered (gdb_stdlog
, "\
4002 target_remove_mask_watchpoint (%s, %s, %d) = %d\n",
4003 core_addr_to_string (addr
),
4004 core_addr_to_string (mask
), rw
, ret
);
4012 /* The documentation for this function is in its prototype declaration
4016 target_masked_watch_num_registers (CORE_ADDR addr
, CORE_ADDR mask
)
4018 struct target_ops
*t
;
4020 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4021 if (t
->to_masked_watch_num_registers
!= NULL
)
4022 return t
->to_masked_watch_num_registers (t
, addr
, mask
);
4027 /* The documentation for this function is in its prototype declaration
4031 target_ranged_break_num_registers (void)
4033 struct target_ops
*t
;
4035 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4036 if (t
->to_ranged_break_num_registers
!= NULL
)
4037 return t
->to_ranged_break_num_registers (t
);
4044 struct btrace_target_info
*
4045 target_enable_btrace (ptid_t ptid
)
4047 struct target_ops
*t
;
4049 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4050 if (t
->to_enable_btrace
!= NULL
)
4051 return t
->to_enable_btrace (t
, ptid
);
4060 target_disable_btrace (struct btrace_target_info
*btinfo
)
4062 struct target_ops
*t
;
4064 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4065 if (t
->to_disable_btrace
!= NULL
)
4067 t
->to_disable_btrace (t
, btinfo
);
4077 target_teardown_btrace (struct btrace_target_info
*btinfo
)
4079 struct target_ops
*t
;
4081 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4082 if (t
->to_teardown_btrace
!= NULL
)
4084 t
->to_teardown_btrace (t
, btinfo
);
4094 target_read_btrace (VEC (btrace_block_s
) **btrace
,
4095 struct btrace_target_info
*btinfo
,
4096 enum btrace_read_type type
)
4098 struct target_ops
*t
;
4100 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4101 if (t
->to_read_btrace
!= NULL
)
4102 return t
->to_read_btrace (t
, btrace
, btinfo
, type
);
4105 return BTRACE_ERR_NOT_SUPPORTED
;
4111 target_stop_recording (void)
4113 struct target_ops
*t
;
4115 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4116 if (t
->to_stop_recording
!= NULL
)
4118 t
->to_stop_recording (t
);
4122 /* This is optional. */
4128 target_info_record (void)
4130 struct target_ops
*t
;
4132 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4133 if (t
->to_info_record
!= NULL
)
4135 t
->to_info_record (t
);
4145 target_save_record (const char *filename
)
4147 struct target_ops
*t
;
4149 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4150 if (t
->to_save_record
!= NULL
)
4152 t
->to_save_record (t
, filename
);
4162 target_supports_delete_record (void)
4164 struct target_ops
*t
;
4166 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4167 if (t
->to_delete_record
!= NULL
)
4176 target_delete_record (void)
4178 struct target_ops
*t
;
4180 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4181 if (t
->to_delete_record
!= NULL
)
4183 t
->to_delete_record (t
);
4193 target_record_is_replaying (void)
4195 struct target_ops
*t
;
4197 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4198 if (t
->to_record_is_replaying
!= NULL
)
4199 return t
->to_record_is_replaying (t
);
4207 target_goto_record_begin (void)
4209 struct target_ops
*t
;
4211 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4212 if (t
->to_goto_record_begin
!= NULL
)
4214 t
->to_goto_record_begin (t
);
4224 target_goto_record_end (void)
4226 struct target_ops
*t
;
4228 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4229 if (t
->to_goto_record_end
!= NULL
)
4231 t
->to_goto_record_end (t
);
4241 target_goto_record (ULONGEST insn
)
4243 struct target_ops
*t
;
4245 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4246 if (t
->to_goto_record
!= NULL
)
4248 t
->to_goto_record (t
, insn
);
4258 target_insn_history (int size
, int flags
)
4260 struct target_ops
*t
;
4262 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4263 if (t
->to_insn_history
!= NULL
)
4265 t
->to_insn_history (t
, size
, flags
);
4275 target_insn_history_from (ULONGEST from
, int size
, int flags
)
4277 struct target_ops
*t
;
4279 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4280 if (t
->to_insn_history_from
!= NULL
)
4282 t
->to_insn_history_from (t
, from
, size
, flags
);
4292 target_insn_history_range (ULONGEST begin
, ULONGEST end
, int flags
)
4294 struct target_ops
*t
;
4296 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4297 if (t
->to_insn_history_range
!= NULL
)
4299 t
->to_insn_history_range (t
, begin
, end
, flags
);
4309 target_call_history (int size
, int flags
)
4311 struct target_ops
*t
;
4313 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4314 if (t
->to_call_history
!= NULL
)
4316 t
->to_call_history (t
, size
, flags
);
4326 target_call_history_from (ULONGEST begin
, int size
, int flags
)
4328 struct target_ops
*t
;
4330 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4331 if (t
->to_call_history_from
!= NULL
)
4333 t
->to_call_history_from (t
, begin
, size
, flags
);
4343 target_call_history_range (ULONGEST begin
, ULONGEST end
, int flags
)
4345 struct target_ops
*t
;
4347 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4348 if (t
->to_call_history_range
!= NULL
)
4350 t
->to_call_history_range (t
, begin
, end
, flags
);
4358 debug_to_prepare_to_store (struct target_ops
*self
, struct regcache
*regcache
)
4360 debug_target
.to_prepare_to_store (&debug_target
, regcache
);
4362 fprintf_unfiltered (gdb_stdlog
, "target_prepare_to_store ()\n");
4367 const struct frame_unwind
*
4368 target_get_unwinder (void)
4370 struct target_ops
*t
;
4372 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4373 if (t
->to_get_unwinder
!= NULL
)
4374 return t
->to_get_unwinder
;
4381 const struct frame_unwind
*
4382 target_get_tailcall_unwinder (void)
4384 struct target_ops
*t
;
4386 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4387 if (t
->to_get_tailcall_unwinder
!= NULL
)
4388 return t
->to_get_tailcall_unwinder
;
4396 forward_target_decr_pc_after_break (struct target_ops
*ops
,
4397 struct gdbarch
*gdbarch
)
4399 for (; ops
!= NULL
; ops
= ops
->beneath
)
4400 if (ops
->to_decr_pc_after_break
!= NULL
)
4401 return ops
->to_decr_pc_after_break (ops
, gdbarch
);
4403 return gdbarch_decr_pc_after_break (gdbarch
);
4409 target_decr_pc_after_break (struct gdbarch
*gdbarch
)
4411 return forward_target_decr_pc_after_break (current_target
.beneath
, gdbarch
);
4415 deprecated_debug_xfer_memory (CORE_ADDR memaddr
, bfd_byte
*myaddr
, int len
,
4416 int write
, struct mem_attrib
*attrib
,
4417 struct target_ops
*target
)
4421 retval
= debug_target
.deprecated_xfer_memory (memaddr
, myaddr
, len
, write
,
4424 fprintf_unfiltered (gdb_stdlog
,
4425 "target_xfer_memory (%s, xxx, %d, %s, xxx) = %d",
4426 paddress (target_gdbarch (), memaddr
), len
,
4427 write
? "write" : "read", retval
);
4433 fputs_unfiltered (", bytes =", gdb_stdlog
);
4434 for (i
= 0; i
< retval
; i
++)
4436 if ((((intptr_t) &(myaddr
[i
])) & 0xf) == 0)
4438 if (targetdebug
< 2 && i
> 0)
4440 fprintf_unfiltered (gdb_stdlog
, " ...");
4443 fprintf_unfiltered (gdb_stdlog
, "\n");
4446 fprintf_unfiltered (gdb_stdlog
, " %02x", myaddr
[i
] & 0xff);
4450 fputc_unfiltered ('\n', gdb_stdlog
);
4456 debug_to_files_info (struct target_ops
*target
)
4458 debug_target
.to_files_info (target
);
4460 fprintf_unfiltered (gdb_stdlog
, "target_files_info (xxx)\n");
4464 debug_to_insert_breakpoint (struct target_ops
*ops
, struct gdbarch
*gdbarch
,
4465 struct bp_target_info
*bp_tgt
)
4469 retval
= debug_target
.to_insert_breakpoint (&debug_target
, gdbarch
, bp_tgt
);
4471 fprintf_unfiltered (gdb_stdlog
,
4472 "target_insert_breakpoint (%s, xxx) = %ld\n",
4473 core_addr_to_string (bp_tgt
->placed_address
),
4474 (unsigned long) retval
);
4479 debug_to_remove_breakpoint (struct target_ops
*ops
, struct gdbarch
*gdbarch
,
4480 struct bp_target_info
*bp_tgt
)
4484 retval
= debug_target
.to_remove_breakpoint (&debug_target
, gdbarch
, bp_tgt
);
4486 fprintf_unfiltered (gdb_stdlog
,
4487 "target_remove_breakpoint (%s, xxx) = %ld\n",
4488 core_addr_to_string (bp_tgt
->placed_address
),
4489 (unsigned long) retval
);
4494 debug_to_can_use_hw_breakpoint (struct target_ops
*self
,
4495 int type
, int cnt
, int from_tty
)
4499 retval
= debug_target
.to_can_use_hw_breakpoint (&debug_target
,
4500 type
, cnt
, from_tty
);
4502 fprintf_unfiltered (gdb_stdlog
,
4503 "target_can_use_hw_breakpoint (%ld, %ld, %ld) = %ld\n",
4504 (unsigned long) type
,
4505 (unsigned long) cnt
,
4506 (unsigned long) from_tty
,
4507 (unsigned long) retval
);
4512 debug_to_region_ok_for_hw_watchpoint (struct target_ops
*self
,
4513 CORE_ADDR addr
, int len
)
4517 retval
= debug_target
.to_region_ok_for_hw_watchpoint (&debug_target
,
4520 fprintf_unfiltered (gdb_stdlog
,
4521 "target_region_ok_for_hw_watchpoint (%s, %ld) = %s\n",
4522 core_addr_to_string (addr
), (unsigned long) len
,
4523 core_addr_to_string (retval
));
4528 debug_to_can_accel_watchpoint_condition (struct target_ops
*self
,
4529 CORE_ADDR addr
, int len
, int rw
,
4530 struct expression
*cond
)
4534 retval
= debug_target
.to_can_accel_watchpoint_condition (&debug_target
,
4538 fprintf_unfiltered (gdb_stdlog
,
4539 "target_can_accel_watchpoint_condition "
4540 "(%s, %d, %d, %s) = %ld\n",
4541 core_addr_to_string (addr
), len
, rw
,
4542 host_address_to_string (cond
), (unsigned long) retval
);
4547 debug_to_stopped_by_watchpoint (struct target_ops
*ops
)
4551 retval
= debug_target
.to_stopped_by_watchpoint (&debug_target
);
4553 fprintf_unfiltered (gdb_stdlog
,
4554 "target_stopped_by_watchpoint () = %ld\n",
4555 (unsigned long) retval
);
4560 debug_to_stopped_data_address (struct target_ops
*target
, CORE_ADDR
*addr
)
4564 retval
= debug_target
.to_stopped_data_address (target
, addr
);
4566 fprintf_unfiltered (gdb_stdlog
,
4567 "target_stopped_data_address ([%s]) = %ld\n",
4568 core_addr_to_string (*addr
),
4569 (unsigned long)retval
);
4574 debug_to_watchpoint_addr_within_range (struct target_ops
*target
,
4576 CORE_ADDR start
, int length
)
4580 retval
= debug_target
.to_watchpoint_addr_within_range (target
, addr
,
4583 fprintf_filtered (gdb_stdlog
,
4584 "target_watchpoint_addr_within_range (%s, %s, %d) = %d\n",
4585 core_addr_to_string (addr
), core_addr_to_string (start
),
4591 debug_to_insert_hw_breakpoint (struct target_ops
*self
,
4592 struct gdbarch
*gdbarch
,
4593 struct bp_target_info
*bp_tgt
)
4597 retval
= debug_target
.to_insert_hw_breakpoint (&debug_target
,
4600 fprintf_unfiltered (gdb_stdlog
,
4601 "target_insert_hw_breakpoint (%s, xxx) = %ld\n",
4602 core_addr_to_string (bp_tgt
->placed_address
),
4603 (unsigned long) retval
);
4608 debug_to_remove_hw_breakpoint (struct target_ops
*self
,
4609 struct gdbarch
*gdbarch
,
4610 struct bp_target_info
*bp_tgt
)
4614 retval
= debug_target
.to_remove_hw_breakpoint (&debug_target
,
4617 fprintf_unfiltered (gdb_stdlog
,
4618 "target_remove_hw_breakpoint (%s, xxx) = %ld\n",
4619 core_addr_to_string (bp_tgt
->placed_address
),
4620 (unsigned long) retval
);
4625 debug_to_insert_watchpoint (struct target_ops
*self
,
4626 CORE_ADDR addr
, int len
, int type
,
4627 struct expression
*cond
)
4631 retval
= debug_target
.to_insert_watchpoint (&debug_target
,
4632 addr
, len
, type
, cond
);
4634 fprintf_unfiltered (gdb_stdlog
,
4635 "target_insert_watchpoint (%s, %d, %d, %s) = %ld\n",
4636 core_addr_to_string (addr
), len
, type
,
4637 host_address_to_string (cond
), (unsigned long) retval
);
4642 debug_to_remove_watchpoint (struct target_ops
*self
,
4643 CORE_ADDR addr
, int len
, int type
,
4644 struct expression
*cond
)
4648 retval
= debug_target
.to_remove_watchpoint (&debug_target
,
4649 addr
, len
, type
, cond
);
4651 fprintf_unfiltered (gdb_stdlog
,
4652 "target_remove_watchpoint (%s, %d, %d, %s) = %ld\n",
4653 core_addr_to_string (addr
), len
, type
,
4654 host_address_to_string (cond
), (unsigned long) retval
);
4659 debug_to_terminal_init (struct target_ops
*self
)
4661 debug_target
.to_terminal_init (&debug_target
);
4663 fprintf_unfiltered (gdb_stdlog
, "target_terminal_init ()\n");
4667 debug_to_terminal_inferior (struct target_ops
*self
)
4669 debug_target
.to_terminal_inferior (&debug_target
);
4671 fprintf_unfiltered (gdb_stdlog
, "target_terminal_inferior ()\n");
4675 debug_to_terminal_ours_for_output (struct target_ops
*self
)
4677 debug_target
.to_terminal_ours_for_output (&debug_target
);
4679 fprintf_unfiltered (gdb_stdlog
, "target_terminal_ours_for_output ()\n");
4683 debug_to_terminal_ours (struct target_ops
*self
)
4685 debug_target
.to_terminal_ours (&debug_target
);
4687 fprintf_unfiltered (gdb_stdlog
, "target_terminal_ours ()\n");
4691 debug_to_terminal_save_ours (struct target_ops
*self
)
4693 debug_target
.to_terminal_save_ours (&debug_target
);
4695 fprintf_unfiltered (gdb_stdlog
, "target_terminal_save_ours ()\n");
4699 debug_to_terminal_info (struct target_ops
*self
,
4700 const char *arg
, int from_tty
)
4702 debug_target
.to_terminal_info (&debug_target
, arg
, from_tty
);
4704 fprintf_unfiltered (gdb_stdlog
, "target_terminal_info (%s, %d)\n", arg
,
4709 debug_to_load (struct target_ops
*self
, char *args
, int from_tty
)
4711 debug_target
.to_load (&debug_target
, args
, from_tty
);
4713 fprintf_unfiltered (gdb_stdlog
, "target_load (%s, %d)\n", args
, from_tty
);
4717 debug_to_post_startup_inferior (struct target_ops
*self
, ptid_t ptid
)
4719 debug_target
.to_post_startup_inferior (&debug_target
, ptid
);
4721 fprintf_unfiltered (gdb_stdlog
, "target_post_startup_inferior (%d)\n",
4722 ptid_get_pid (ptid
));
4726 debug_to_insert_fork_catchpoint (struct target_ops
*self
, int pid
)
4730 retval
= debug_target
.to_insert_fork_catchpoint (&debug_target
, pid
);
4732 fprintf_unfiltered (gdb_stdlog
, "target_insert_fork_catchpoint (%d) = %d\n",
4739 debug_to_remove_fork_catchpoint (struct target_ops
*self
, int pid
)
4743 retval
= debug_target
.to_remove_fork_catchpoint (&debug_target
, pid
);
4745 fprintf_unfiltered (gdb_stdlog
, "target_remove_fork_catchpoint (%d) = %d\n",
4752 debug_to_insert_vfork_catchpoint (struct target_ops
*self
, int pid
)
4756 retval
= debug_target
.to_insert_vfork_catchpoint (&debug_target
, pid
);
4758 fprintf_unfiltered (gdb_stdlog
, "target_insert_vfork_catchpoint (%d) = %d\n",
4765 debug_to_remove_vfork_catchpoint (struct target_ops
*self
, int pid
)
4769 retval
= debug_target
.to_remove_vfork_catchpoint (&debug_target
, pid
);
4771 fprintf_unfiltered (gdb_stdlog
, "target_remove_vfork_catchpoint (%d) = %d\n",
4778 debug_to_insert_exec_catchpoint (struct target_ops
*self
, int pid
)
4782 retval
= debug_target
.to_insert_exec_catchpoint (&debug_target
, pid
);
4784 fprintf_unfiltered (gdb_stdlog
, "target_insert_exec_catchpoint (%d) = %d\n",
4791 debug_to_remove_exec_catchpoint (struct target_ops
*self
, int pid
)
4795 retval
= debug_target
.to_remove_exec_catchpoint (&debug_target
, pid
);
4797 fprintf_unfiltered (gdb_stdlog
, "target_remove_exec_catchpoint (%d) = %d\n",
4804 debug_to_has_exited (struct target_ops
*self
,
4805 int pid
, int wait_status
, int *exit_status
)
4809 has_exited
= debug_target
.to_has_exited (&debug_target
,
4810 pid
, wait_status
, exit_status
);
4812 fprintf_unfiltered (gdb_stdlog
, "target_has_exited (%d, %d, %d) = %d\n",
4813 pid
, wait_status
, *exit_status
, has_exited
);
4819 debug_to_can_run (struct target_ops
*self
)
4823 retval
= debug_target
.to_can_run (&debug_target
);
4825 fprintf_unfiltered (gdb_stdlog
, "target_can_run () = %d\n", retval
);
4830 static struct gdbarch
*
4831 debug_to_thread_architecture (struct target_ops
*ops
, ptid_t ptid
)
4833 struct gdbarch
*retval
;
4835 retval
= debug_target
.to_thread_architecture (ops
, ptid
);
4837 fprintf_unfiltered (gdb_stdlog
,
4838 "target_thread_architecture (%s) = %s [%s]\n",
4839 target_pid_to_str (ptid
),
4840 host_address_to_string (retval
),
4841 gdbarch_bfd_arch_info (retval
)->printable_name
);
4846 debug_to_stop (struct target_ops
*self
, ptid_t ptid
)
4848 debug_target
.to_stop (&debug_target
, ptid
);
4850 fprintf_unfiltered (gdb_stdlog
, "target_stop (%s)\n",
4851 target_pid_to_str (ptid
));
4855 debug_to_rcmd (struct target_ops
*self
, char *command
,
4856 struct ui_file
*outbuf
)
4858 debug_target
.to_rcmd (&debug_target
, command
, outbuf
);
4859 fprintf_unfiltered (gdb_stdlog
, "target_rcmd (%s, ...)\n", command
);
4863 debug_to_pid_to_exec_file (struct target_ops
*self
, int pid
)
4867 exec_file
= debug_target
.to_pid_to_exec_file (&debug_target
, pid
);
4869 fprintf_unfiltered (gdb_stdlog
, "target_pid_to_exec_file (%d) = %s\n",
4876 setup_target_debug (void)
4878 memcpy (&debug_target
, ¤t_target
, sizeof debug_target
);
4880 current_target
.to_open
= debug_to_open
;
4881 current_target
.to_post_attach
= debug_to_post_attach
;
4882 current_target
.to_prepare_to_store
= debug_to_prepare_to_store
;
4883 current_target
.deprecated_xfer_memory
= deprecated_debug_xfer_memory
;
4884 current_target
.to_files_info
= debug_to_files_info
;
4885 current_target
.to_insert_breakpoint
= debug_to_insert_breakpoint
;
4886 current_target
.to_remove_breakpoint
= debug_to_remove_breakpoint
;
4887 current_target
.to_can_use_hw_breakpoint
= debug_to_can_use_hw_breakpoint
;
4888 current_target
.to_insert_hw_breakpoint
= debug_to_insert_hw_breakpoint
;
4889 current_target
.to_remove_hw_breakpoint
= debug_to_remove_hw_breakpoint
;
4890 current_target
.to_insert_watchpoint
= debug_to_insert_watchpoint
;
4891 current_target
.to_remove_watchpoint
= debug_to_remove_watchpoint
;
4892 current_target
.to_stopped_by_watchpoint
= debug_to_stopped_by_watchpoint
;
4893 current_target
.to_stopped_data_address
= debug_to_stopped_data_address
;
4894 current_target
.to_watchpoint_addr_within_range
4895 = debug_to_watchpoint_addr_within_range
;
4896 current_target
.to_region_ok_for_hw_watchpoint
4897 = debug_to_region_ok_for_hw_watchpoint
;
4898 current_target
.to_can_accel_watchpoint_condition
4899 = debug_to_can_accel_watchpoint_condition
;
4900 current_target
.to_terminal_init
= debug_to_terminal_init
;
4901 current_target
.to_terminal_inferior
= debug_to_terminal_inferior
;
4902 current_target
.to_terminal_ours_for_output
4903 = debug_to_terminal_ours_for_output
;
4904 current_target
.to_terminal_ours
= debug_to_terminal_ours
;
4905 current_target
.to_terminal_save_ours
= debug_to_terminal_save_ours
;
4906 current_target
.to_terminal_info
= debug_to_terminal_info
;
4907 current_target
.to_load
= debug_to_load
;
4908 current_target
.to_post_startup_inferior
= debug_to_post_startup_inferior
;
4909 current_target
.to_insert_fork_catchpoint
= debug_to_insert_fork_catchpoint
;
4910 current_target
.to_remove_fork_catchpoint
= debug_to_remove_fork_catchpoint
;
4911 current_target
.to_insert_vfork_catchpoint
= debug_to_insert_vfork_catchpoint
;
4912 current_target
.to_remove_vfork_catchpoint
= debug_to_remove_vfork_catchpoint
;
4913 current_target
.to_insert_exec_catchpoint
= debug_to_insert_exec_catchpoint
;
4914 current_target
.to_remove_exec_catchpoint
= debug_to_remove_exec_catchpoint
;
4915 current_target
.to_has_exited
= debug_to_has_exited
;
4916 current_target
.to_can_run
= debug_to_can_run
;
4917 current_target
.to_stop
= debug_to_stop
;
4918 current_target
.to_rcmd
= debug_to_rcmd
;
4919 current_target
.to_pid_to_exec_file
= debug_to_pid_to_exec_file
;
4920 current_target
.to_thread_architecture
= debug_to_thread_architecture
;
4924 static char targ_desc
[] =
4925 "Names of targets and files being debugged.\nShows the entire \
4926 stack of targets currently in use (including the exec-file,\n\
4927 core-file, and process, if any), as well as the symbol file name.";
4930 default_rcmd (struct target_ops
*self
, char *command
, struct ui_file
*output
)
4932 error (_("\"monitor\" command not supported by this target."));
4936 do_monitor_command (char *cmd
,
4939 target_rcmd (cmd
, gdb_stdtarg
);
4942 /* Print the name of each layers of our target stack. */
4945 maintenance_print_target_stack (char *cmd
, int from_tty
)
4947 struct target_ops
*t
;
4949 printf_filtered (_("The current target stack is:\n"));
4951 for (t
= target_stack
; t
!= NULL
; t
= t
->beneath
)
4953 printf_filtered (" - %s (%s)\n", t
->to_shortname
, t
->to_longname
);
4957 /* Controls if async mode is permitted. */
4958 int target_async_permitted
= 0;
4960 /* The set command writes to this variable. If the inferior is
4961 executing, target_async_permitted is *not* updated. */
4962 static int target_async_permitted_1
= 0;
4965 set_target_async_command (char *args
, int from_tty
,
4966 struct cmd_list_element
*c
)
4968 if (have_live_inferiors ())
4970 target_async_permitted_1
= target_async_permitted
;
4971 error (_("Cannot change this setting while the inferior is running."));
4974 target_async_permitted
= target_async_permitted_1
;
4978 show_target_async_command (struct ui_file
*file
, int from_tty
,
4979 struct cmd_list_element
*c
,
4982 fprintf_filtered (file
,
4983 _("Controlling the inferior in "
4984 "asynchronous mode is %s.\n"), value
);
4987 /* Temporary copies of permission settings. */
4989 static int may_write_registers_1
= 1;
4990 static int may_write_memory_1
= 1;
4991 static int may_insert_breakpoints_1
= 1;
4992 static int may_insert_tracepoints_1
= 1;
4993 static int may_insert_fast_tracepoints_1
= 1;
4994 static int may_stop_1
= 1;
4996 /* Make the user-set values match the real values again. */
4999 update_target_permissions (void)
5001 may_write_registers_1
= may_write_registers
;
5002 may_write_memory_1
= may_write_memory
;
5003 may_insert_breakpoints_1
= may_insert_breakpoints
;
5004 may_insert_tracepoints_1
= may_insert_tracepoints
;
5005 may_insert_fast_tracepoints_1
= may_insert_fast_tracepoints
;
5006 may_stop_1
= may_stop
;
5009 /* The one function handles (most of) the permission flags in the same
5013 set_target_permissions (char *args
, int from_tty
,
5014 struct cmd_list_element
*c
)
5016 if (target_has_execution
)
5018 update_target_permissions ();
5019 error (_("Cannot change this setting while the inferior is running."));
5022 /* Make the real values match the user-changed values. */
5023 may_write_registers
= may_write_registers_1
;
5024 may_insert_breakpoints
= may_insert_breakpoints_1
;
5025 may_insert_tracepoints
= may_insert_tracepoints_1
;
5026 may_insert_fast_tracepoints
= may_insert_fast_tracepoints_1
;
5027 may_stop
= may_stop_1
;
5028 update_observer_mode ();
5031 /* Set memory write permission independently of observer mode. */
5034 set_write_memory_permission (char *args
, int from_tty
,
5035 struct cmd_list_element
*c
)
5037 /* Make the real values match the user-changed values. */
5038 may_write_memory
= may_write_memory_1
;
5039 update_observer_mode ();
5044 initialize_targets (void)
5046 init_dummy_target ();
5047 push_target (&dummy_target
);
5049 add_info ("target", target_info
, targ_desc
);
5050 add_info ("files", target_info
, targ_desc
);
5052 add_setshow_zuinteger_cmd ("target", class_maintenance
, &targetdebug
, _("\
5053 Set target debugging."), _("\
5054 Show target debugging."), _("\
5055 When non-zero, target debugging is enabled. Higher numbers are more\n\
5056 verbose. Changes do not take effect until the next \"run\" or \"target\"\n\
5060 &setdebuglist
, &showdebuglist
);
5062 add_setshow_boolean_cmd ("trust-readonly-sections", class_support
,
5063 &trust_readonly
, _("\
5064 Set mode for reading from readonly sections."), _("\
5065 Show mode for reading from readonly sections."), _("\
5066 When this mode is on, memory reads from readonly sections (such as .text)\n\
5067 will be read from the object file instead of from the target. This will\n\
5068 result in significant performance improvement for remote targets."),
5070 show_trust_readonly
,
5071 &setlist
, &showlist
);
5073 add_com ("monitor", class_obscure
, do_monitor_command
,
5074 _("Send a command to the remote monitor (remote targets only)."));
5076 add_cmd ("target-stack", class_maintenance
, maintenance_print_target_stack
,
5077 _("Print the name of each layer of the internal target stack."),
5078 &maintenanceprintlist
);
5080 add_setshow_boolean_cmd ("target-async", no_class
,
5081 &target_async_permitted_1
, _("\
5082 Set whether gdb controls the inferior in asynchronous mode."), _("\
5083 Show whether gdb controls the inferior in asynchronous mode."), _("\
5084 Tells gdb whether to control the inferior in asynchronous mode."),
5085 set_target_async_command
,
5086 show_target_async_command
,
5090 add_setshow_boolean_cmd ("may-write-registers", class_support
,
5091 &may_write_registers_1
, _("\
5092 Set permission to write into registers."), _("\
5093 Show permission to write into registers."), _("\
5094 When this permission is on, GDB may write into the target's registers.\n\
5095 Otherwise, any sort of write attempt will result in an error."),
5096 set_target_permissions
, NULL
,
5097 &setlist
, &showlist
);
5099 add_setshow_boolean_cmd ("may-write-memory", class_support
,
5100 &may_write_memory_1
, _("\
5101 Set permission to write into target memory."), _("\
5102 Show permission to write into target memory."), _("\
5103 When this permission is on, GDB may write into the target's memory.\n\
5104 Otherwise, any sort of write attempt will result in an error."),
5105 set_write_memory_permission
, NULL
,
5106 &setlist
, &showlist
);
5108 add_setshow_boolean_cmd ("may-insert-breakpoints", class_support
,
5109 &may_insert_breakpoints_1
, _("\
5110 Set permission to insert breakpoints in the target."), _("\
5111 Show permission to insert breakpoints in the target."), _("\
5112 When this permission is on, GDB may insert breakpoints in the program.\n\
5113 Otherwise, any sort of insertion attempt will result in an error."),
5114 set_target_permissions
, NULL
,
5115 &setlist
, &showlist
);
5117 add_setshow_boolean_cmd ("may-insert-tracepoints", class_support
,
5118 &may_insert_tracepoints_1
, _("\
5119 Set permission to insert tracepoints in the target."), _("\
5120 Show permission to insert tracepoints in the target."), _("\
5121 When this permission is on, GDB may insert tracepoints in the program.\n\
5122 Otherwise, any sort of insertion attempt will result in an error."),
5123 set_target_permissions
, NULL
,
5124 &setlist
, &showlist
);
5126 add_setshow_boolean_cmd ("may-insert-fast-tracepoints", class_support
,
5127 &may_insert_fast_tracepoints_1
, _("\
5128 Set permission to insert fast tracepoints in the target."), _("\
5129 Show permission to insert fast tracepoints in the target."), _("\
5130 When this permission is on, GDB may insert fast tracepoints.\n\
5131 Otherwise, any sort of insertion attempt will result in an error."),
5132 set_target_permissions
, NULL
,
5133 &setlist
, &showlist
);
5135 add_setshow_boolean_cmd ("may-interrupt", class_support
,
5137 Set permission to interrupt or signal the target."), _("\
5138 Show permission to interrupt or signal the target."), _("\
5139 When this permission is on, GDB may interrupt/stop the target's execution.\n\
5140 Otherwise, any attempt to interrupt or stop will be ignored."),
5141 set_target_permissions
, NULL
,
5142 &setlist
, &showlist
);