1 /* Select target systems and architectures at runtime for GDB.
3 Copyright (C) 1990-2014 Free Software Foundation, Inc.
5 Contributed by Cygnus Support.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
26 #include "target-dcache.h"
36 #include "gdb_assert.h"
38 #include "exceptions.h"
39 #include "target-descriptions.h"
40 #include "gdbthread.h"
43 #include "inline-frame.h"
44 #include "tracepoint.h"
45 #include "gdb/fileio.h"
48 static void target_info (char *, int);
50 static void default_terminal_info (struct target_ops
*, const char *, int);
52 static int default_watchpoint_addr_within_range (struct target_ops
*,
53 CORE_ADDR
, CORE_ADDR
, int);
55 static int default_region_ok_for_hw_watchpoint (struct target_ops
*,
58 static void default_rcmd (struct target_ops
*, char *, struct ui_file
*);
60 static ptid_t
default_get_ada_task_ptid (struct target_ops
*self
,
63 static void tcomplain (void) ATTRIBUTE_NORETURN
;
65 static int nomemory (CORE_ADDR
, char *, int, int, struct target_ops
*);
67 static int return_zero (void);
69 static int return_minus_one (void);
71 static void *return_null (void);
73 void target_ignore (void);
75 static void target_command (char *, int);
77 static struct target_ops
*find_default_run_target (char *);
79 static target_xfer_partial_ftype default_xfer_partial
;
81 static struct gdbarch
*default_thread_architecture (struct target_ops
*ops
,
84 static int dummy_find_memory_regions (struct target_ops
*self
,
85 find_memory_region_ftype ignore1
,
88 static char *dummy_make_corefile_notes (struct target_ops
*self
,
89 bfd
*ignore1
, int *ignore2
);
91 static int find_default_can_async_p (struct target_ops
*ignore
);
93 static int find_default_is_async_p (struct target_ops
*ignore
);
95 static enum exec_direction_kind default_execution_direction
96 (struct target_ops
*self
);
98 #include "target-delegates.c"
100 static void init_dummy_target (void);
102 static struct target_ops debug_target
;
104 static void debug_to_open (char *, int);
106 static void debug_to_prepare_to_store (struct target_ops
*self
,
109 static void debug_to_files_info (struct target_ops
*);
111 static int debug_to_insert_breakpoint (struct target_ops
*, struct gdbarch
*,
112 struct bp_target_info
*);
114 static int debug_to_remove_breakpoint (struct target_ops
*, struct gdbarch
*,
115 struct bp_target_info
*);
117 static int debug_to_can_use_hw_breakpoint (struct target_ops
*self
,
120 static int debug_to_insert_hw_breakpoint (struct target_ops
*self
,
122 struct bp_target_info
*);
124 static int debug_to_remove_hw_breakpoint (struct target_ops
*self
,
126 struct bp_target_info
*);
128 static int debug_to_insert_watchpoint (struct target_ops
*self
,
130 struct expression
*);
132 static int debug_to_remove_watchpoint (struct target_ops
*self
,
134 struct expression
*);
136 static int debug_to_stopped_data_address (struct target_ops
*, CORE_ADDR
*);
138 static int debug_to_watchpoint_addr_within_range (struct target_ops
*,
139 CORE_ADDR
, CORE_ADDR
, int);
141 static int debug_to_region_ok_for_hw_watchpoint (struct target_ops
*self
,
144 static int debug_to_can_accel_watchpoint_condition (struct target_ops
*self
,
146 struct expression
*);
148 static void debug_to_terminal_init (struct target_ops
*self
);
150 static void debug_to_terminal_inferior (struct target_ops
*self
);
152 static void debug_to_terminal_ours_for_output (struct target_ops
*self
);
154 static void debug_to_terminal_save_ours (struct target_ops
*self
);
156 static void debug_to_terminal_ours (struct target_ops
*self
);
158 static void debug_to_load (struct target_ops
*self
, char *, int);
160 static int debug_to_can_run (struct target_ops
*self
);
162 static void debug_to_stop (struct target_ops
*self
, ptid_t
);
164 /* Pointer to array of target architecture structures; the size of the
165 array; the current index into the array; the allocated size of the
167 struct target_ops
**target_structs
;
168 unsigned target_struct_size
;
169 unsigned target_struct_allocsize
;
170 #define DEFAULT_ALLOCSIZE 10
172 /* The initial current target, so that there is always a semi-valid
175 static struct target_ops dummy_target
;
177 /* Top of target stack. */
179 static struct target_ops
*target_stack
;
181 /* The target structure we are currently using to talk to a process
182 or file or whatever "inferior" we have. */
184 struct target_ops current_target
;
186 /* Command list for target. */
188 static struct cmd_list_element
*targetlist
= NULL
;
190 /* Nonzero if we should trust readonly sections from the
191 executable when reading memory. */
193 static int trust_readonly
= 0;
195 /* Nonzero if we should show true memory content including
196 memory breakpoint inserted by gdb. */
198 static int show_memory_breakpoints
= 0;
200 /* These globals control whether GDB attempts to perform these
201 operations; they are useful for targets that need to prevent
202 inadvertant disruption, such as in non-stop mode. */
204 int may_write_registers
= 1;
206 int may_write_memory
= 1;
208 int may_insert_breakpoints
= 1;
210 int may_insert_tracepoints
= 1;
212 int may_insert_fast_tracepoints
= 1;
216 /* Non-zero if we want to see trace of target level stuff. */
218 static unsigned int targetdebug
= 0;
220 show_targetdebug (struct ui_file
*file
, int from_tty
,
221 struct cmd_list_element
*c
, const char *value
)
223 fprintf_filtered (file
, _("Target debugging is %s.\n"), value
);
226 static void setup_target_debug (void);
228 /* The user just typed 'target' without the name of a target. */
231 target_command (char *arg
, int from_tty
)
233 fputs_filtered ("Argument required (target name). Try `help target'\n",
237 /* Default target_has_* methods for process_stratum targets. */
240 default_child_has_all_memory (struct target_ops
*ops
)
242 /* If no inferior selected, then we can't read memory here. */
243 if (ptid_equal (inferior_ptid
, null_ptid
))
250 default_child_has_memory (struct target_ops
*ops
)
252 /* If no inferior selected, then we can't read memory here. */
253 if (ptid_equal (inferior_ptid
, null_ptid
))
260 default_child_has_stack (struct target_ops
*ops
)
262 /* If no inferior selected, there's no stack. */
263 if (ptid_equal (inferior_ptid
, null_ptid
))
270 default_child_has_registers (struct target_ops
*ops
)
272 /* Can't read registers from no inferior. */
273 if (ptid_equal (inferior_ptid
, null_ptid
))
280 default_child_has_execution (struct target_ops
*ops
, ptid_t the_ptid
)
282 /* If there's no thread selected, then we can't make it run through
284 if (ptid_equal (the_ptid
, null_ptid
))
292 target_has_all_memory_1 (void)
294 struct target_ops
*t
;
296 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
297 if (t
->to_has_all_memory (t
))
304 target_has_memory_1 (void)
306 struct target_ops
*t
;
308 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
309 if (t
->to_has_memory (t
))
316 target_has_stack_1 (void)
318 struct target_ops
*t
;
320 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
321 if (t
->to_has_stack (t
))
328 target_has_registers_1 (void)
330 struct target_ops
*t
;
332 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
333 if (t
->to_has_registers (t
))
340 target_has_execution_1 (ptid_t the_ptid
)
342 struct target_ops
*t
;
344 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
345 if (t
->to_has_execution (t
, the_ptid
))
352 target_has_execution_current (void)
354 return target_has_execution_1 (inferior_ptid
);
357 /* Complete initialization of T. This ensures that various fields in
358 T are set, if needed by the target implementation. */
361 complete_target_initialization (struct target_ops
*t
)
363 /* Provide default values for all "must have" methods. */
364 if (t
->to_xfer_partial
== NULL
)
365 t
->to_xfer_partial
= default_xfer_partial
;
367 if (t
->to_has_all_memory
== NULL
)
368 t
->to_has_all_memory
= (int (*) (struct target_ops
*)) return_zero
;
370 if (t
->to_has_memory
== NULL
)
371 t
->to_has_memory
= (int (*) (struct target_ops
*)) return_zero
;
373 if (t
->to_has_stack
== NULL
)
374 t
->to_has_stack
= (int (*) (struct target_ops
*)) return_zero
;
376 if (t
->to_has_registers
== NULL
)
377 t
->to_has_registers
= (int (*) (struct target_ops
*)) return_zero
;
379 if (t
->to_has_execution
== NULL
)
380 t
->to_has_execution
= (int (*) (struct target_ops
*, ptid_t
)) return_zero
;
382 install_delegators (t
);
385 /* Add possible target architecture T to the list and add a new
386 command 'target T->to_shortname'. Set COMPLETER as the command's
387 completer if not NULL. */
390 add_target_with_completer (struct target_ops
*t
,
391 completer_ftype
*completer
)
393 struct cmd_list_element
*c
;
395 complete_target_initialization (t
);
399 target_struct_allocsize
= DEFAULT_ALLOCSIZE
;
400 target_structs
= (struct target_ops
**) xmalloc
401 (target_struct_allocsize
* sizeof (*target_structs
));
403 if (target_struct_size
>= target_struct_allocsize
)
405 target_struct_allocsize
*= 2;
406 target_structs
= (struct target_ops
**)
407 xrealloc ((char *) target_structs
,
408 target_struct_allocsize
* sizeof (*target_structs
));
410 target_structs
[target_struct_size
++] = t
;
412 if (targetlist
== NULL
)
413 add_prefix_cmd ("target", class_run
, target_command
, _("\
414 Connect to a target machine or process.\n\
415 The first argument is the type or protocol of the target machine.\n\
416 Remaining arguments are interpreted by the target protocol. For more\n\
417 information on the arguments for a particular protocol, type\n\
418 `help target ' followed by the protocol name."),
419 &targetlist
, "target ", 0, &cmdlist
);
420 c
= add_cmd (t
->to_shortname
, no_class
, t
->to_open
, t
->to_doc
,
422 if (completer
!= NULL
)
423 set_cmd_completer (c
, completer
);
426 /* Add a possible target architecture to the list. */
429 add_target (struct target_ops
*t
)
431 add_target_with_completer (t
, NULL
);
437 add_deprecated_target_alias (struct target_ops
*t
, char *alias
)
439 struct cmd_list_element
*c
;
442 /* If we use add_alias_cmd, here, we do not get the deprecated warning,
444 c
= add_cmd (alias
, no_class
, t
->to_open
, t
->to_doc
, &targetlist
);
445 alt
= xstrprintf ("target %s", t
->to_shortname
);
446 deprecate_cmd (c
, alt
);
459 struct target_ops
*t
;
461 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
462 if (t
->to_kill
!= NULL
)
465 fprintf_unfiltered (gdb_stdlog
, "target_kill ()\n");
475 target_load (char *arg
, int from_tty
)
477 target_dcache_invalidate ();
478 (*current_target
.to_load
) (¤t_target
, arg
, from_tty
);
482 target_create_inferior (char *exec_file
, char *args
,
483 char **env
, int from_tty
)
485 struct target_ops
*t
;
487 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
489 if (t
->to_create_inferior
!= NULL
)
491 t
->to_create_inferior (t
, exec_file
, args
, env
, from_tty
);
493 fprintf_unfiltered (gdb_stdlog
,
494 "target_create_inferior (%s, %s, xxx, %d)\n",
495 exec_file
, args
, from_tty
);
500 internal_error (__FILE__
, __LINE__
,
501 _("could not find a target to create inferior"));
505 target_terminal_inferior (void)
507 /* A background resume (``run&'') should leave GDB in control of the
508 terminal. Use target_can_async_p, not target_is_async_p, since at
509 this point the target is not async yet. However, if sync_execution
510 is not set, we know it will become async prior to resume. */
511 if (target_can_async_p () && !sync_execution
)
514 /* If GDB is resuming the inferior in the foreground, install
515 inferior's terminal modes. */
516 (*current_target
.to_terminal_inferior
) (¤t_target
);
520 nomemory (CORE_ADDR memaddr
, char *myaddr
, int len
, int write
,
521 struct target_ops
*t
)
523 errno
= EIO
; /* Can't read/write this location. */
524 return 0; /* No bytes handled. */
530 error (_("You can't do that when your target is `%s'"),
531 current_target
.to_shortname
);
537 error (_("You can't do that without a process to debug."));
541 default_terminal_info (struct target_ops
*self
, const char *args
, int from_tty
)
543 printf_unfiltered (_("No saved terminal information.\n"));
546 /* A default implementation for the to_get_ada_task_ptid target method.
548 This function builds the PTID by using both LWP and TID as part of
549 the PTID lwp and tid elements. The pid used is the pid of the
553 default_get_ada_task_ptid (struct target_ops
*self
, long lwp
, long tid
)
555 return ptid_build (ptid_get_pid (inferior_ptid
), lwp
, tid
);
558 static enum exec_direction_kind
559 default_execution_direction (struct target_ops
*self
)
561 if (!target_can_execute_reverse
)
563 else if (!target_can_async_p ())
566 gdb_assert_not_reached ("\
567 to_execution_direction must be implemented for reverse async");
570 /* Go through the target stack from top to bottom, copying over zero
571 entries in current_target, then filling in still empty entries. In
572 effect, we are doing class inheritance through the pushed target
575 NOTE: cagney/2003-10-17: The problem with this inheritance, as it
576 is currently implemented, is that it discards any knowledge of
577 which target an inherited method originally belonged to.
578 Consequently, new new target methods should instead explicitly and
579 locally search the target stack for the target that can handle the
583 update_current_target (void)
585 struct target_ops
*t
;
587 /* First, reset current's contents. */
588 memset (¤t_target
, 0, sizeof (current_target
));
590 /* Install the delegators. */
591 install_delegators (¤t_target
);
593 #define INHERIT(FIELD, TARGET) \
594 if (!current_target.FIELD) \
595 current_target.FIELD = (TARGET)->FIELD
597 for (t
= target_stack
; t
; t
= t
->beneath
)
599 INHERIT (to_shortname
, t
);
600 INHERIT (to_longname
, t
);
602 /* Do not inherit to_open. */
603 /* Do not inherit to_close. */
604 /* Do not inherit to_attach. */
605 /* Do not inherit to_post_attach. */
606 INHERIT (to_attach_no_wait
, t
);
607 /* Do not inherit to_detach. */
608 /* Do not inherit to_disconnect. */
609 /* Do not inherit to_resume. */
610 /* Do not inherit to_wait. */
611 /* Do not inherit to_fetch_registers. */
612 /* Do not inherit to_store_registers. */
613 /* Do not inherit to_prepare_to_store. */
614 INHERIT (deprecated_xfer_memory
, t
);
615 /* Do not inherit to_files_info. */
616 /* Do not inherit to_insert_breakpoint. */
617 /* Do not inherit to_remove_breakpoint. */
618 /* Do not inherit to_can_use_hw_breakpoint. */
619 /* Do not inherit to_insert_hw_breakpoint. */
620 /* Do not inherit to_remove_hw_breakpoint. */
621 /* Do not inherit to_ranged_break_num_registers. */
622 /* Do not inherit to_insert_watchpoint. */
623 /* Do not inherit to_remove_watchpoint. */
624 /* Do not inherit to_insert_mask_watchpoint. */
625 /* Do not inherit to_remove_mask_watchpoint. */
626 /* Do not inherit to_stopped_data_address. */
627 INHERIT (to_have_steppable_watchpoint
, t
);
628 INHERIT (to_have_continuable_watchpoint
, t
);
629 /* Do not inherit to_stopped_by_watchpoint. */
630 /* Do not inherit to_watchpoint_addr_within_range. */
631 /* Do not inherit to_region_ok_for_hw_watchpoint. */
632 /* Do not inherit to_can_accel_watchpoint_condition. */
633 /* Do not inherit to_masked_watch_num_registers. */
634 /* Do not inherit to_terminal_init. */
635 /* Do not inherit to_terminal_inferior. */
636 /* Do not inherit to_terminal_ours_for_output. */
637 /* Do not inherit to_terminal_ours. */
638 /* Do not inherit to_terminal_save_ours. */
639 /* Do not inherit to_terminal_info. */
640 /* Do not inherit to_kill. */
641 /* Do not inherit to_load. */
642 /* Do no inherit to_create_inferior. */
643 /* Do not inherit to_post_startup_inferior. */
644 /* Do not inherit to_insert_fork_catchpoint. */
645 /* Do not inherit to_remove_fork_catchpoint. */
646 /* Do not inherit to_insert_vfork_catchpoint. */
647 /* Do not inherit to_remove_vfork_catchpoint. */
648 /* Do not inherit to_follow_fork. */
649 /* Do not inherit to_insert_exec_catchpoint. */
650 /* Do not inherit to_remove_exec_catchpoint. */
651 /* Do not inherit to_set_syscall_catchpoint. */
652 /* Do not inherit to_has_exited. */
653 /* Do not inherit to_mourn_inferior. */
654 INHERIT (to_can_run
, t
);
655 /* Do not inherit to_pass_signals. */
656 /* Do not inherit to_program_signals. */
657 /* Do not inherit to_thread_alive. */
658 /* Do not inherit to_find_new_threads. */
659 /* Do not inherit to_pid_to_str. */
660 /* Do not inherit to_extra_thread_info. */
661 /* Do not inherit to_thread_name. */
662 INHERIT (to_stop
, t
);
663 /* Do not inherit to_xfer_partial. */
664 /* Do not inherit to_rcmd. */
665 /* Do not inherit to_pid_to_exec_file. */
666 /* Do not inherit to_log_command. */
667 INHERIT (to_stratum
, t
);
668 /* Do not inherit to_has_all_memory. */
669 /* Do not inherit to_has_memory. */
670 /* Do not inherit to_has_stack. */
671 /* Do not inherit to_has_registers. */
672 /* Do not inherit to_has_execution. */
673 INHERIT (to_has_thread_control
, t
);
674 /* Do not inherit to_can_async_p. */
675 /* Do not inherit to_is_async_p. */
676 /* Do not inherit to_async. */
677 /* Do not inherit to_find_memory_regions. */
678 /* Do not inherit to_make_corefile_notes. */
679 /* Do not inherit to_get_bookmark. */
680 /* Do not inherit to_goto_bookmark. */
681 /* Do not inherit to_get_thread_local_address. */
682 /* Do not inherit to_can_execute_reverse. */
683 /* Do not inherit to_execution_direction. */
684 /* Do not inherit to_thread_architecture. */
685 /* Do not inherit to_read_description. */
686 /* Do not inherit to_get_ada_task_ptid. */
687 /* Do not inherit to_search_memory. */
688 /* Do not inherit to_supports_multi_process. */
689 /* Do not inherit to_supports_enable_disable_tracepoint. */
690 /* Do not inherit to_supports_string_tracing. */
691 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_trace_init
,
756 (void (*) (struct target_ops
*))
758 de_fault (to_download_tracepoint
,
759 (void (*) (struct target_ops
*, struct bp_location
*))
761 de_fault (to_can_download_tracepoint
,
762 (int (*) (struct target_ops
*))
764 de_fault (to_download_trace_state_variable
,
765 (void (*) (struct target_ops
*, struct trace_state_variable
*))
767 de_fault (to_enable_tracepoint
,
768 (void (*) (struct target_ops
*, struct bp_location
*))
770 de_fault (to_disable_tracepoint
,
771 (void (*) (struct target_ops
*, struct bp_location
*))
773 de_fault (to_trace_set_readonly_regions
,
774 (void (*) (struct target_ops
*))
776 de_fault (to_trace_start
,
777 (void (*) (struct target_ops
*))
779 de_fault (to_get_trace_status
,
780 (int (*) (struct target_ops
*, struct trace_status
*))
782 de_fault (to_get_tracepoint_status
,
783 (void (*) (struct target_ops
*, struct breakpoint
*,
784 struct uploaded_tp
*))
786 de_fault (to_trace_stop
,
787 (void (*) (struct target_ops
*))
789 de_fault (to_trace_find
,
790 (int (*) (struct target_ops
*,
791 enum trace_find_type
, int, CORE_ADDR
, CORE_ADDR
, int *))
793 de_fault (to_get_trace_state_variable_value
,
794 (int (*) (struct target_ops
*, int, LONGEST
*))
796 de_fault (to_save_trace_data
,
797 (int (*) (struct target_ops
*, const char *))
799 de_fault (to_upload_tracepoints
,
800 (int (*) (struct target_ops
*, struct uploaded_tp
**))
802 de_fault (to_upload_trace_state_variables
,
803 (int (*) (struct target_ops
*, struct uploaded_tsv
**))
805 de_fault (to_get_raw_trace_data
,
806 (LONGEST (*) (struct target_ops
*, gdb_byte
*, ULONGEST
, LONGEST
))
808 de_fault (to_get_min_fast_tracepoint_insn_len
,
809 (int (*) (struct target_ops
*))
811 de_fault (to_set_disconnected_tracing
,
812 (void (*) (struct target_ops
*, int))
814 de_fault (to_set_circular_trace_buffer
,
815 (void (*) (struct target_ops
*, int))
817 de_fault (to_set_trace_buffer_size
,
818 (void (*) (struct target_ops
*, LONGEST
))
820 de_fault (to_set_trace_notes
,
821 (int (*) (struct target_ops
*,
822 const char *, const char *, const char *))
824 de_fault (to_get_tib_address
,
825 (int (*) (struct target_ops
*, ptid_t
, CORE_ADDR
*))
827 de_fault (to_set_permissions
,
828 (void (*) (struct target_ops
*))
830 de_fault (to_static_tracepoint_marker_at
,
831 (int (*) (struct target_ops
*,
832 CORE_ADDR
, struct static_tracepoint_marker
*))
834 de_fault (to_static_tracepoint_markers_by_strid
,
835 (VEC(static_tracepoint_marker_p
) * (*) (struct target_ops
*,
838 de_fault (to_traceframe_info
,
839 (struct traceframe_info
* (*) (struct target_ops
*))
841 de_fault (to_supports_evaluation_of_breakpoint_conditions
,
842 (int (*) (struct target_ops
*))
844 de_fault (to_can_run_breakpoint_commands
,
845 (int (*) (struct target_ops
*))
847 de_fault (to_use_agent
,
848 (int (*) (struct target_ops
*, int))
850 de_fault (to_can_use_agent
,
851 (int (*) (struct target_ops
*))
853 de_fault (to_augmented_libraries_svr4_read
,
854 (int (*) (struct target_ops
*))
859 /* Finally, position the target-stack beneath the squashed
860 "current_target". That way code looking for a non-inherited
861 target method can quickly and simply find it. */
862 current_target
.beneath
= target_stack
;
865 setup_target_debug ();
868 /* Push a new target type into the stack of the existing target accessors,
869 possibly superseding some of the existing accessors.
871 Rather than allow an empty stack, we always have the dummy target at
872 the bottom stratum, so we can call the function vectors without
876 push_target (struct target_ops
*t
)
878 struct target_ops
**cur
;
880 /* Check magic number. If wrong, it probably means someone changed
881 the struct definition, but not all the places that initialize one. */
882 if (t
->to_magic
!= OPS_MAGIC
)
884 fprintf_unfiltered (gdb_stderr
,
885 "Magic number of %s target struct wrong\n",
887 internal_error (__FILE__
, __LINE__
,
888 _("failed internal consistency check"));
891 /* Find the proper stratum to install this target in. */
892 for (cur
= &target_stack
; (*cur
) != NULL
; cur
= &(*cur
)->beneath
)
894 if ((int) (t
->to_stratum
) >= (int) (*cur
)->to_stratum
)
898 /* If there's already targets at this stratum, remove them. */
899 /* FIXME: cagney/2003-10-15: I think this should be popping all
900 targets to CUR, and not just those at this stratum level. */
901 while ((*cur
) != NULL
&& t
->to_stratum
== (*cur
)->to_stratum
)
903 /* There's already something at this stratum level. Close it,
904 and un-hook it from the stack. */
905 struct target_ops
*tmp
= (*cur
);
907 (*cur
) = (*cur
)->beneath
;
912 /* We have removed all targets in our stratum, now add the new one. */
916 update_current_target ();
919 /* Remove a target_ops vector from the stack, wherever it may be.
920 Return how many times it was removed (0 or 1). */
923 unpush_target (struct target_ops
*t
)
925 struct target_ops
**cur
;
926 struct target_ops
*tmp
;
928 if (t
->to_stratum
== dummy_stratum
)
929 internal_error (__FILE__
, __LINE__
,
930 _("Attempt to unpush the dummy target"));
932 /* Look for the specified target. Note that we assume that a target
933 can only occur once in the target stack. */
935 for (cur
= &target_stack
; (*cur
) != NULL
; cur
= &(*cur
)->beneath
)
941 /* If we don't find target_ops, quit. Only open targets should be
946 /* Unchain the target. */
948 (*cur
) = (*cur
)->beneath
;
951 update_current_target ();
953 /* Finally close the target. Note we do this after unchaining, so
954 any target method calls from within the target_close
955 implementation don't end up in T anymore. */
962 pop_all_targets_above (enum strata above_stratum
)
964 while ((int) (current_target
.to_stratum
) > (int) above_stratum
)
966 if (!unpush_target (target_stack
))
968 fprintf_unfiltered (gdb_stderr
,
969 "pop_all_targets couldn't find target %s\n",
970 target_stack
->to_shortname
);
971 internal_error (__FILE__
, __LINE__
,
972 _("failed internal consistency check"));
979 pop_all_targets (void)
981 pop_all_targets_above (dummy_stratum
);
984 /* Return 1 if T is now pushed in the target stack. Return 0 otherwise. */
987 target_is_pushed (struct target_ops
*t
)
989 struct target_ops
**cur
;
991 /* Check magic number. If wrong, it probably means someone changed
992 the struct definition, but not all the places that initialize one. */
993 if (t
->to_magic
!= OPS_MAGIC
)
995 fprintf_unfiltered (gdb_stderr
,
996 "Magic number of %s target struct wrong\n",
998 internal_error (__FILE__
, __LINE__
,
999 _("failed internal consistency check"));
1002 for (cur
= &target_stack
; (*cur
) != NULL
; cur
= &(*cur
)->beneath
)
1009 /* Using the objfile specified in OBJFILE, find the address for the
1010 current thread's thread-local storage with offset OFFSET. */
1012 target_translate_tls_address (struct objfile
*objfile
, CORE_ADDR offset
)
1014 volatile CORE_ADDR addr
= 0;
1015 struct target_ops
*target
;
1017 for (target
= current_target
.beneath
;
1019 target
= target
->beneath
)
1021 if (target
->to_get_thread_local_address
!= NULL
)
1026 && gdbarch_fetch_tls_load_module_address_p (target_gdbarch ()))
1028 ptid_t ptid
= inferior_ptid
;
1029 volatile struct gdb_exception ex
;
1031 TRY_CATCH (ex
, RETURN_MASK_ALL
)
1035 /* Fetch the load module address for this objfile. */
1036 lm_addr
= gdbarch_fetch_tls_load_module_address (target_gdbarch (),
1038 /* If it's 0, throw the appropriate exception. */
1040 throw_error (TLS_LOAD_MODULE_NOT_FOUND_ERROR
,
1041 _("TLS load module not found"));
1043 addr
= target
->to_get_thread_local_address (target
, ptid
,
1046 /* If an error occurred, print TLS related messages here. Otherwise,
1047 throw the error to some higher catcher. */
1050 int objfile_is_library
= (objfile
->flags
& OBJF_SHARED
);
1054 case TLS_NO_LIBRARY_SUPPORT_ERROR
:
1055 error (_("Cannot find thread-local variables "
1056 "in this thread library."));
1058 case TLS_LOAD_MODULE_NOT_FOUND_ERROR
:
1059 if (objfile_is_library
)
1060 error (_("Cannot find shared library `%s' in dynamic"
1061 " linker's load module list"), objfile_name (objfile
));
1063 error (_("Cannot find executable file `%s' in dynamic"
1064 " linker's load module list"), objfile_name (objfile
));
1066 case TLS_NOT_ALLOCATED_YET_ERROR
:
1067 if (objfile_is_library
)
1068 error (_("The inferior has not yet allocated storage for"
1069 " thread-local variables in\n"
1070 "the shared library `%s'\n"
1072 objfile_name (objfile
), target_pid_to_str (ptid
));
1074 error (_("The inferior has not yet allocated storage for"
1075 " thread-local variables in\n"
1076 "the executable `%s'\n"
1078 objfile_name (objfile
), target_pid_to_str (ptid
));
1080 case TLS_GENERIC_ERROR
:
1081 if (objfile_is_library
)
1082 error (_("Cannot find thread-local storage for %s, "
1083 "shared library %s:\n%s"),
1084 target_pid_to_str (ptid
),
1085 objfile_name (objfile
), ex
.message
);
1087 error (_("Cannot find thread-local storage for %s, "
1088 "executable file %s:\n%s"),
1089 target_pid_to_str (ptid
),
1090 objfile_name (objfile
), ex
.message
);
1093 throw_exception (ex
);
1098 /* It wouldn't be wrong here to try a gdbarch method, too; finding
1099 TLS is an ABI-specific thing. But we don't do that yet. */
1101 error (_("Cannot find thread-local variables on this target"));
1107 target_xfer_status_to_string (enum target_xfer_status err
)
1109 #define CASE(X) case X: return #X
1112 CASE(TARGET_XFER_E_IO
);
1113 CASE(TARGET_XFER_E_UNAVAILABLE
);
1122 #define MIN(A, B) (((A) <= (B)) ? (A) : (B))
1124 /* target_read_string -- read a null terminated string, up to LEN bytes,
1125 from MEMADDR in target. Set *ERRNOP to the errno code, or 0 if successful.
1126 Set *STRING to a pointer to malloc'd memory containing the data; the caller
1127 is responsible for freeing it. Return the number of bytes successfully
1131 target_read_string (CORE_ADDR memaddr
, char **string
, int len
, int *errnop
)
1133 int tlen
, offset
, i
;
1137 int buffer_allocated
;
1139 unsigned int nbytes_read
= 0;
1141 gdb_assert (string
);
1143 /* Small for testing. */
1144 buffer_allocated
= 4;
1145 buffer
= xmalloc (buffer_allocated
);
1150 tlen
= MIN (len
, 4 - (memaddr
& 3));
1151 offset
= memaddr
& 3;
1153 errcode
= target_read_memory (memaddr
& ~3, buf
, sizeof buf
);
1156 /* The transfer request might have crossed the boundary to an
1157 unallocated region of memory. Retry the transfer, requesting
1161 errcode
= target_read_memory (memaddr
, buf
, 1);
1166 if (bufptr
- buffer
+ tlen
> buffer_allocated
)
1170 bytes
= bufptr
- buffer
;
1171 buffer_allocated
*= 2;
1172 buffer
= xrealloc (buffer
, buffer_allocated
);
1173 bufptr
= buffer
+ bytes
;
1176 for (i
= 0; i
< tlen
; i
++)
1178 *bufptr
++ = buf
[i
+ offset
];
1179 if (buf
[i
+ offset
] == '\000')
1181 nbytes_read
+= i
+ 1;
1188 nbytes_read
+= tlen
;
1197 struct target_section_table
*
1198 target_get_section_table (struct target_ops
*target
)
1200 struct target_ops
*t
;
1203 fprintf_unfiltered (gdb_stdlog
, "target_get_section_table ()\n");
1205 for (t
= target
; t
!= NULL
; t
= t
->beneath
)
1206 if (t
->to_get_section_table
!= NULL
)
1207 return (*t
->to_get_section_table
) (t
);
1212 /* Find a section containing ADDR. */
1214 struct target_section
*
1215 target_section_by_addr (struct target_ops
*target
, CORE_ADDR addr
)
1217 struct target_section_table
*table
= target_get_section_table (target
);
1218 struct target_section
*secp
;
1223 for (secp
= table
->sections
; secp
< table
->sections_end
; secp
++)
1225 if (addr
>= secp
->addr
&& addr
< secp
->endaddr
)
1231 /* Read memory from the live target, even if currently inspecting a
1232 traceframe. The return is the same as that of target_read. */
1234 static enum target_xfer_status
1235 target_read_live_memory (enum target_object object
,
1236 ULONGEST memaddr
, gdb_byte
*myaddr
, ULONGEST len
,
1237 ULONGEST
*xfered_len
)
1239 enum target_xfer_status ret
;
1240 struct cleanup
*cleanup
;
1242 /* Switch momentarily out of tfind mode so to access live memory.
1243 Note that this must not clear global state, such as the frame
1244 cache, which must still remain valid for the previous traceframe.
1245 We may be _building_ the frame cache at this point. */
1246 cleanup
= make_cleanup_restore_traceframe_number ();
1247 set_traceframe_number (-1);
1249 ret
= target_xfer_partial (current_target
.beneath
, object
, NULL
,
1250 myaddr
, NULL
, memaddr
, len
, xfered_len
);
1252 do_cleanups (cleanup
);
1256 /* Using the set of read-only target sections of OPS, read live
1257 read-only memory. Note that the actual reads start from the
1258 top-most target again.
1260 For interface/parameters/return description see target.h,
1263 static enum target_xfer_status
1264 memory_xfer_live_readonly_partial (struct target_ops
*ops
,
1265 enum target_object object
,
1266 gdb_byte
*readbuf
, ULONGEST memaddr
,
1267 ULONGEST len
, ULONGEST
*xfered_len
)
1269 struct target_section
*secp
;
1270 struct target_section_table
*table
;
1272 secp
= target_section_by_addr (ops
, memaddr
);
1274 && (bfd_get_section_flags (secp
->the_bfd_section
->owner
,
1275 secp
->the_bfd_section
)
1278 struct target_section
*p
;
1279 ULONGEST memend
= memaddr
+ len
;
1281 table
= target_get_section_table (ops
);
1283 for (p
= table
->sections
; p
< table
->sections_end
; p
++)
1285 if (memaddr
>= p
->addr
)
1287 if (memend
<= p
->endaddr
)
1289 /* Entire transfer is within this section. */
1290 return target_read_live_memory (object
, memaddr
,
1291 readbuf
, len
, xfered_len
);
1293 else if (memaddr
>= p
->endaddr
)
1295 /* This section ends before the transfer starts. */
1300 /* This section overlaps the transfer. Just do half. */
1301 len
= p
->endaddr
- memaddr
;
1302 return target_read_live_memory (object
, memaddr
,
1303 readbuf
, len
, xfered_len
);
1309 return TARGET_XFER_EOF
;
1312 /* Read memory from more than one valid target. A core file, for
1313 instance, could have some of memory but delegate other bits to
1314 the target below it. So, we must manually try all targets. */
1316 static enum target_xfer_status
1317 raw_memory_xfer_partial (struct target_ops
*ops
, gdb_byte
*readbuf
,
1318 const gdb_byte
*writebuf
, ULONGEST memaddr
, LONGEST len
,
1319 ULONGEST
*xfered_len
)
1321 enum target_xfer_status res
;
1325 res
= ops
->to_xfer_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1326 readbuf
, writebuf
, memaddr
, len
,
1328 if (res
== TARGET_XFER_OK
)
1331 /* Stop if the target reports that the memory is not available. */
1332 if (res
== TARGET_XFER_E_UNAVAILABLE
)
1335 /* We want to continue past core files to executables, but not
1336 past a running target's memory. */
1337 if (ops
->to_has_all_memory (ops
))
1342 while (ops
!= NULL
);
1347 /* Perform a partial memory transfer.
1348 For docs see target.h, to_xfer_partial. */
1350 static enum target_xfer_status
1351 memory_xfer_partial_1 (struct target_ops
*ops
, enum target_object object
,
1352 gdb_byte
*readbuf
, const gdb_byte
*writebuf
, ULONGEST memaddr
,
1353 ULONGEST len
, ULONGEST
*xfered_len
)
1355 enum target_xfer_status res
;
1357 struct mem_region
*region
;
1358 struct inferior
*inf
;
1360 /* For accesses to unmapped overlay sections, read directly from
1361 files. Must do this first, as MEMADDR may need adjustment. */
1362 if (readbuf
!= NULL
&& overlay_debugging
)
1364 struct obj_section
*section
= find_pc_overlay (memaddr
);
1366 if (pc_in_unmapped_range (memaddr
, section
))
1368 struct target_section_table
*table
1369 = target_get_section_table (ops
);
1370 const char *section_name
= section
->the_bfd_section
->name
;
1372 memaddr
= overlay_mapped_address (memaddr
, section
);
1373 return section_table_xfer_memory_partial (readbuf
, writebuf
,
1374 memaddr
, len
, xfered_len
,
1376 table
->sections_end
,
1381 /* Try the executable files, if "trust-readonly-sections" is set. */
1382 if (readbuf
!= NULL
&& trust_readonly
)
1384 struct target_section
*secp
;
1385 struct target_section_table
*table
;
1387 secp
= target_section_by_addr (ops
, memaddr
);
1389 && (bfd_get_section_flags (secp
->the_bfd_section
->owner
,
1390 secp
->the_bfd_section
)
1393 table
= target_get_section_table (ops
);
1394 return section_table_xfer_memory_partial (readbuf
, writebuf
,
1395 memaddr
, len
, xfered_len
,
1397 table
->sections_end
,
1402 /* If reading unavailable memory in the context of traceframes, and
1403 this address falls within a read-only section, fallback to
1404 reading from live memory. */
1405 if (readbuf
!= NULL
&& get_traceframe_number () != -1)
1407 VEC(mem_range_s
) *available
;
1409 /* If we fail to get the set of available memory, then the
1410 target does not support querying traceframe info, and so we
1411 attempt reading from the traceframe anyway (assuming the
1412 target implements the old QTro packet then). */
1413 if (traceframe_available_memory (&available
, memaddr
, len
))
1415 struct cleanup
*old_chain
;
1417 old_chain
= make_cleanup (VEC_cleanup(mem_range_s
), &available
);
1419 if (VEC_empty (mem_range_s
, available
)
1420 || VEC_index (mem_range_s
, available
, 0)->start
!= memaddr
)
1422 /* Don't read into the traceframe's available
1424 if (!VEC_empty (mem_range_s
, available
))
1426 LONGEST oldlen
= len
;
1428 len
= VEC_index (mem_range_s
, available
, 0)->start
- memaddr
;
1429 gdb_assert (len
<= oldlen
);
1432 do_cleanups (old_chain
);
1434 /* This goes through the topmost target again. */
1435 res
= memory_xfer_live_readonly_partial (ops
, object
,
1438 if (res
== TARGET_XFER_OK
)
1439 return TARGET_XFER_OK
;
1442 /* No use trying further, we know some memory starting
1443 at MEMADDR isn't available. */
1445 return TARGET_XFER_E_UNAVAILABLE
;
1449 /* Don't try to read more than how much is available, in
1450 case the target implements the deprecated QTro packet to
1451 cater for older GDBs (the target's knowledge of read-only
1452 sections may be outdated by now). */
1453 len
= VEC_index (mem_range_s
, available
, 0)->length
;
1455 do_cleanups (old_chain
);
1459 /* Try GDB's internal data cache. */
1460 region
= lookup_mem_region (memaddr
);
1461 /* region->hi == 0 means there's no upper bound. */
1462 if (memaddr
+ len
< region
->hi
|| region
->hi
== 0)
1465 reg_len
= region
->hi
- memaddr
;
1467 switch (region
->attrib
.mode
)
1470 if (writebuf
!= NULL
)
1471 return TARGET_XFER_E_IO
;
1475 if (readbuf
!= NULL
)
1476 return TARGET_XFER_E_IO
;
1480 /* We only support writing to flash during "load" for now. */
1481 if (writebuf
!= NULL
)
1482 error (_("Writing to flash memory forbidden in this context"));
1486 return TARGET_XFER_E_IO
;
1489 if (!ptid_equal (inferior_ptid
, null_ptid
))
1490 inf
= find_inferior_pid (ptid_get_pid (inferior_ptid
));
1495 /* The dcache reads whole cache lines; that doesn't play well
1496 with reading from a trace buffer, because reading outside of
1497 the collected memory range fails. */
1498 && get_traceframe_number () == -1
1499 && (region
->attrib
.cache
1500 || (stack_cache_enabled_p () && object
== TARGET_OBJECT_STACK_MEMORY
)
1501 || (code_cache_enabled_p () && object
== TARGET_OBJECT_CODE_MEMORY
)))
1503 DCACHE
*dcache
= target_dcache_get_or_init ();
1506 if (readbuf
!= NULL
)
1507 l
= dcache_xfer_memory (ops
, dcache
, memaddr
, readbuf
, reg_len
, 0);
1509 /* FIXME drow/2006-08-09: If we're going to preserve const
1510 correctness dcache_xfer_memory should take readbuf and
1512 l
= dcache_xfer_memory (ops
, dcache
, memaddr
, (void *) writebuf
,
1515 return TARGET_XFER_E_IO
;
1518 *xfered_len
= (ULONGEST
) l
;
1519 return TARGET_XFER_OK
;
1523 /* If none of those methods found the memory we wanted, fall back
1524 to a target partial transfer. Normally a single call to
1525 to_xfer_partial is enough; if it doesn't recognize an object
1526 it will call the to_xfer_partial of the next target down.
1527 But for memory this won't do. Memory is the only target
1528 object which can be read from more than one valid target.
1529 A core file, for instance, could have some of memory but
1530 delegate other bits to the target below it. So, we must
1531 manually try all targets. */
1533 res
= raw_memory_xfer_partial (ops
, readbuf
, writebuf
, memaddr
, reg_len
,
1536 /* Make sure the cache gets updated no matter what - if we are writing
1537 to the stack. Even if this write is not tagged as such, we still need
1538 to update the cache. */
1540 if (res
== TARGET_XFER_OK
1543 && target_dcache_init_p ()
1544 && !region
->attrib
.cache
1545 && ((stack_cache_enabled_p () && object
!= TARGET_OBJECT_STACK_MEMORY
)
1546 || (code_cache_enabled_p () && object
!= TARGET_OBJECT_CODE_MEMORY
)))
1548 DCACHE
*dcache
= target_dcache_get ();
1550 dcache_update (dcache
, memaddr
, (void *) writebuf
, reg_len
);
1553 /* If we still haven't got anything, return the last error. We
1558 /* Perform a partial memory transfer. For docs see target.h,
1561 static enum target_xfer_status
1562 memory_xfer_partial (struct target_ops
*ops
, enum target_object object
,
1563 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1564 ULONGEST memaddr
, ULONGEST len
, ULONGEST
*xfered_len
)
1566 enum target_xfer_status res
;
1568 /* Zero length requests are ok and require no work. */
1570 return TARGET_XFER_EOF
;
1572 /* Fill in READBUF with breakpoint shadows, or WRITEBUF with
1573 breakpoint insns, thus hiding out from higher layers whether
1574 there are software breakpoints inserted in the code stream. */
1575 if (readbuf
!= NULL
)
1577 res
= memory_xfer_partial_1 (ops
, object
, readbuf
, NULL
, memaddr
, len
,
1580 if (res
== TARGET_XFER_OK
&& !show_memory_breakpoints
)
1581 breakpoint_xfer_memory (readbuf
, NULL
, NULL
, memaddr
, res
);
1586 struct cleanup
*old_chain
;
1588 /* A large write request is likely to be partially satisfied
1589 by memory_xfer_partial_1. We will continually malloc
1590 and free a copy of the entire write request for breakpoint
1591 shadow handling even though we only end up writing a small
1592 subset of it. Cap writes to 4KB to mitigate this. */
1593 len
= min (4096, len
);
1595 buf
= xmalloc (len
);
1596 old_chain
= make_cleanup (xfree
, buf
);
1597 memcpy (buf
, writebuf
, len
);
1599 breakpoint_xfer_memory (NULL
, buf
, writebuf
, memaddr
, len
);
1600 res
= memory_xfer_partial_1 (ops
, object
, NULL
, buf
, memaddr
, len
,
1603 do_cleanups (old_chain
);
1610 restore_show_memory_breakpoints (void *arg
)
1612 show_memory_breakpoints
= (uintptr_t) arg
;
1616 make_show_memory_breakpoints_cleanup (int show
)
1618 int current
= show_memory_breakpoints
;
1620 show_memory_breakpoints
= show
;
1621 return make_cleanup (restore_show_memory_breakpoints
,
1622 (void *) (uintptr_t) current
);
1625 /* For docs see target.h, to_xfer_partial. */
1627 enum target_xfer_status
1628 target_xfer_partial (struct target_ops
*ops
,
1629 enum target_object object
, const char *annex
,
1630 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1631 ULONGEST offset
, ULONGEST len
,
1632 ULONGEST
*xfered_len
)
1634 enum target_xfer_status retval
;
1636 gdb_assert (ops
->to_xfer_partial
!= NULL
);
1638 /* Transfer is done when LEN is zero. */
1640 return TARGET_XFER_EOF
;
1642 if (writebuf
&& !may_write_memory
)
1643 error (_("Writing to memory is not allowed (addr %s, len %s)"),
1644 core_addr_to_string_nz (offset
), plongest (len
));
1648 /* If this is a memory transfer, let the memory-specific code
1649 have a look at it instead. Memory transfers are more
1651 if (object
== TARGET_OBJECT_MEMORY
|| object
== TARGET_OBJECT_STACK_MEMORY
1652 || object
== TARGET_OBJECT_CODE_MEMORY
)
1653 retval
= memory_xfer_partial (ops
, object
, readbuf
,
1654 writebuf
, offset
, len
, xfered_len
);
1655 else if (object
== TARGET_OBJECT_RAW_MEMORY
)
1657 /* Request the normal memory object from other layers. */
1658 retval
= raw_memory_xfer_partial (ops
, readbuf
, writebuf
, offset
, len
,
1662 retval
= ops
->to_xfer_partial (ops
, object
, annex
, readbuf
,
1663 writebuf
, offset
, len
, xfered_len
);
1667 const unsigned char *myaddr
= NULL
;
1669 fprintf_unfiltered (gdb_stdlog
,
1670 "%s:target_xfer_partial "
1671 "(%d, %s, %s, %s, %s, %s) = %d, %s",
1674 (annex
? annex
: "(null)"),
1675 host_address_to_string (readbuf
),
1676 host_address_to_string (writebuf
),
1677 core_addr_to_string_nz (offset
),
1678 pulongest (len
), retval
,
1679 pulongest (*xfered_len
));
1685 if (retval
== TARGET_XFER_OK
&& myaddr
!= NULL
)
1689 fputs_unfiltered (", bytes =", gdb_stdlog
);
1690 for (i
= 0; i
< *xfered_len
; i
++)
1692 if ((((intptr_t) &(myaddr
[i
])) & 0xf) == 0)
1694 if (targetdebug
< 2 && i
> 0)
1696 fprintf_unfiltered (gdb_stdlog
, " ...");
1699 fprintf_unfiltered (gdb_stdlog
, "\n");
1702 fprintf_unfiltered (gdb_stdlog
, " %02x", myaddr
[i
] & 0xff);
1706 fputc_unfiltered ('\n', gdb_stdlog
);
1709 /* Check implementations of to_xfer_partial update *XFERED_LEN
1710 properly. Do assertion after printing debug messages, so that we
1711 can find more clues on assertion failure from debugging messages. */
1712 if (retval
== TARGET_XFER_OK
|| retval
== TARGET_XFER_E_UNAVAILABLE
)
1713 gdb_assert (*xfered_len
> 0);
1718 /* Read LEN bytes of target memory at address MEMADDR, placing the
1719 results in GDB's memory at MYADDR. Returns either 0 for success or
1720 TARGET_XFER_E_IO if any error occurs.
1722 If an error occurs, no guarantee is made about the contents of the data at
1723 MYADDR. In particular, the caller should not depend upon partial reads
1724 filling the buffer with good data. There is no way for the caller to know
1725 how much good data might have been transfered anyway. Callers that can
1726 deal with partial reads should call target_read (which will retry until
1727 it makes no progress, and then return how much was transferred). */
1730 target_read_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1732 /* Dispatch to the topmost target, not the flattened current_target.
1733 Memory accesses check target->to_has_(all_)memory, and the
1734 flattened target doesn't inherit those. */
1735 if (target_read (current_target
.beneath
, TARGET_OBJECT_MEMORY
, NULL
,
1736 myaddr
, memaddr
, len
) == len
)
1739 return TARGET_XFER_E_IO
;
1742 /* Like target_read_memory, but specify explicitly that this is a read
1743 from the target's raw memory. That is, this read bypasses the
1744 dcache, breakpoint shadowing, etc. */
1747 target_read_raw_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1749 /* See comment in target_read_memory about why the request starts at
1750 current_target.beneath. */
1751 if (target_read (current_target
.beneath
, TARGET_OBJECT_RAW_MEMORY
, NULL
,
1752 myaddr
, memaddr
, len
) == len
)
1755 return TARGET_XFER_E_IO
;
1758 /* Like target_read_memory, but specify explicitly that this is a read from
1759 the target's stack. This may trigger different cache behavior. */
1762 target_read_stack (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1764 /* See comment in target_read_memory about why the request starts at
1765 current_target.beneath. */
1766 if (target_read (current_target
.beneath
, TARGET_OBJECT_STACK_MEMORY
, NULL
,
1767 myaddr
, memaddr
, len
) == len
)
1770 return TARGET_XFER_E_IO
;
1773 /* Like target_read_memory, but specify explicitly that this is a read from
1774 the target's code. This may trigger different cache behavior. */
1777 target_read_code (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1779 /* See comment in target_read_memory about why the request starts at
1780 current_target.beneath. */
1781 if (target_read (current_target
.beneath
, TARGET_OBJECT_CODE_MEMORY
, NULL
,
1782 myaddr
, memaddr
, len
) == len
)
1785 return TARGET_XFER_E_IO
;
1788 /* Write LEN bytes from MYADDR to target memory at address MEMADDR.
1789 Returns either 0 for success or TARGET_XFER_E_IO if any
1790 error occurs. If an error occurs, no guarantee is made about how
1791 much data got written. Callers that can deal with partial writes
1792 should call target_write. */
1795 target_write_memory (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ssize_t len
)
1797 /* See comment in target_read_memory about why the request starts at
1798 current_target.beneath. */
1799 if (target_write (current_target
.beneath
, TARGET_OBJECT_MEMORY
, NULL
,
1800 myaddr
, memaddr
, len
) == len
)
1803 return TARGET_XFER_E_IO
;
1806 /* Write LEN bytes from MYADDR to target raw memory at address
1807 MEMADDR. Returns either 0 for success or TARGET_XFER_E_IO
1808 if any error occurs. If an error occurs, no guarantee is made
1809 about how much data got written. Callers that can deal with
1810 partial writes should call target_write. */
1813 target_write_raw_memory (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ssize_t len
)
1815 /* See comment in target_read_memory about why the request starts at
1816 current_target.beneath. */
1817 if (target_write (current_target
.beneath
, TARGET_OBJECT_RAW_MEMORY
, NULL
,
1818 myaddr
, memaddr
, len
) == len
)
1821 return TARGET_XFER_E_IO
;
1824 /* Fetch the target's memory map. */
1827 target_memory_map (void)
1829 VEC(mem_region_s
) *result
;
1830 struct mem_region
*last_one
, *this_one
;
1832 struct target_ops
*t
;
1835 fprintf_unfiltered (gdb_stdlog
, "target_memory_map ()\n");
1837 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
1838 if (t
->to_memory_map
!= NULL
)
1844 result
= t
->to_memory_map (t
);
1848 qsort (VEC_address (mem_region_s
, result
),
1849 VEC_length (mem_region_s
, result
),
1850 sizeof (struct mem_region
), mem_region_cmp
);
1852 /* Check that regions do not overlap. Simultaneously assign
1853 a numbering for the "mem" commands to use to refer to
1856 for (ix
= 0; VEC_iterate (mem_region_s
, result
, ix
, this_one
); ix
++)
1858 this_one
->number
= ix
;
1860 if (last_one
&& last_one
->hi
> this_one
->lo
)
1862 warning (_("Overlapping regions in memory map: ignoring"));
1863 VEC_free (mem_region_s
, result
);
1866 last_one
= this_one
;
1873 target_flash_erase (ULONGEST address
, LONGEST length
)
1875 struct target_ops
*t
;
1877 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
1878 if (t
->to_flash_erase
!= NULL
)
1881 fprintf_unfiltered (gdb_stdlog
, "target_flash_erase (%s, %s)\n",
1882 hex_string (address
), phex (length
, 0));
1883 t
->to_flash_erase (t
, address
, length
);
1891 target_flash_done (void)
1893 struct target_ops
*t
;
1895 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
1896 if (t
->to_flash_done
!= NULL
)
1899 fprintf_unfiltered (gdb_stdlog
, "target_flash_done\n");
1900 t
->to_flash_done (t
);
1908 show_trust_readonly (struct ui_file
*file
, int from_tty
,
1909 struct cmd_list_element
*c
, const char *value
)
1911 fprintf_filtered (file
,
1912 _("Mode for reading from readonly sections is %s.\n"),
1916 /* More generic transfers. */
1918 static enum target_xfer_status
1919 default_xfer_partial (struct target_ops
*ops
, enum target_object object
,
1920 const char *annex
, gdb_byte
*readbuf
,
1921 const gdb_byte
*writebuf
, ULONGEST offset
, ULONGEST len
,
1922 ULONGEST
*xfered_len
)
1924 if (object
== TARGET_OBJECT_MEMORY
1925 && ops
->deprecated_xfer_memory
!= NULL
)
1926 /* If available, fall back to the target's
1927 "deprecated_xfer_memory" method. */
1932 if (writebuf
!= NULL
)
1934 void *buffer
= xmalloc (len
);
1935 struct cleanup
*cleanup
= make_cleanup (xfree
, buffer
);
1937 memcpy (buffer
, writebuf
, len
);
1938 xfered
= ops
->deprecated_xfer_memory (offset
, buffer
, len
,
1939 1/*write*/, NULL
, ops
);
1940 do_cleanups (cleanup
);
1942 if (readbuf
!= NULL
)
1943 xfered
= ops
->deprecated_xfer_memory (offset
, readbuf
, len
,
1944 0/*read*/, NULL
, ops
);
1947 *xfered_len
= (ULONGEST
) xfered
;
1948 return TARGET_XFER_E_IO
;
1950 else if (xfered
== 0 && errno
== 0)
1951 /* "deprecated_xfer_memory" uses 0, cross checked against
1952 ERRNO as one indication of an error. */
1953 return TARGET_XFER_EOF
;
1955 return TARGET_XFER_E_IO
;
1959 gdb_assert (ops
->beneath
!= NULL
);
1960 return ops
->beneath
->to_xfer_partial (ops
->beneath
, object
, annex
,
1961 readbuf
, writebuf
, offset
, len
,
1966 /* Target vector read/write partial wrapper functions. */
1968 static enum target_xfer_status
1969 target_read_partial (struct target_ops
*ops
,
1970 enum target_object object
,
1971 const char *annex
, gdb_byte
*buf
,
1972 ULONGEST offset
, ULONGEST len
,
1973 ULONGEST
*xfered_len
)
1975 return target_xfer_partial (ops
, object
, annex
, buf
, NULL
, offset
, len
,
1979 static enum target_xfer_status
1980 target_write_partial (struct target_ops
*ops
,
1981 enum target_object object
,
1982 const char *annex
, const gdb_byte
*buf
,
1983 ULONGEST offset
, LONGEST len
, ULONGEST
*xfered_len
)
1985 return target_xfer_partial (ops
, object
, annex
, NULL
, buf
, offset
, len
,
1989 /* Wrappers to perform the full transfer. */
1991 /* For docs on target_read see target.h. */
1994 target_read (struct target_ops
*ops
,
1995 enum target_object object
,
1996 const char *annex
, gdb_byte
*buf
,
1997 ULONGEST offset
, LONGEST len
)
2001 while (xfered
< len
)
2003 ULONGEST xfered_len
;
2004 enum target_xfer_status status
;
2006 status
= target_read_partial (ops
, object
, annex
,
2007 (gdb_byte
*) buf
+ xfered
,
2008 offset
+ xfered
, len
- xfered
,
2011 /* Call an observer, notifying them of the xfer progress? */
2012 if (status
== TARGET_XFER_EOF
)
2014 else if (status
== TARGET_XFER_OK
)
2016 xfered
+= xfered_len
;
2026 /* Assuming that the entire [begin, end) range of memory cannot be
2027 read, try to read whatever subrange is possible to read.
2029 The function returns, in RESULT, either zero or one memory block.
2030 If there's a readable subrange at the beginning, it is completely
2031 read and returned. Any further readable subrange will not be read.
2032 Otherwise, if there's a readable subrange at the end, it will be
2033 completely read and returned. Any readable subranges before it
2034 (obviously, not starting at the beginning), will be ignored. In
2035 other cases -- either no readable subrange, or readable subrange(s)
2036 that is neither at the beginning, or end, nothing is returned.
2038 The purpose of this function is to handle a read across a boundary
2039 of accessible memory in a case when memory map is not available.
2040 The above restrictions are fine for this case, but will give
2041 incorrect results if the memory is 'patchy'. However, supporting
2042 'patchy' memory would require trying to read every single byte,
2043 and it seems unacceptable solution. Explicit memory map is
2044 recommended for this case -- and target_read_memory_robust will
2045 take care of reading multiple ranges then. */
2048 read_whatever_is_readable (struct target_ops
*ops
,
2049 ULONGEST begin
, ULONGEST end
,
2050 VEC(memory_read_result_s
) **result
)
2052 gdb_byte
*buf
= xmalloc (end
- begin
);
2053 ULONGEST current_begin
= begin
;
2054 ULONGEST current_end
= end
;
2056 memory_read_result_s r
;
2057 ULONGEST xfered_len
;
2059 /* If we previously failed to read 1 byte, nothing can be done here. */
2060 if (end
- begin
<= 1)
2066 /* Check that either first or the last byte is readable, and give up
2067 if not. This heuristic is meant to permit reading accessible memory
2068 at the boundary of accessible region. */
2069 if (target_read_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2070 buf
, begin
, 1, &xfered_len
) == TARGET_XFER_OK
)
2075 else if (target_read_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2076 buf
+ (end
-begin
) - 1, end
- 1, 1,
2077 &xfered_len
) == TARGET_XFER_OK
)
2088 /* Loop invariant is that the [current_begin, current_end) was previously
2089 found to be not readable as a whole.
2091 Note loop condition -- if the range has 1 byte, we can't divide the range
2092 so there's no point trying further. */
2093 while (current_end
- current_begin
> 1)
2095 ULONGEST first_half_begin
, first_half_end
;
2096 ULONGEST second_half_begin
, second_half_end
;
2098 ULONGEST middle
= current_begin
+ (current_end
- current_begin
)/2;
2102 first_half_begin
= current_begin
;
2103 first_half_end
= middle
;
2104 second_half_begin
= middle
;
2105 second_half_end
= current_end
;
2109 first_half_begin
= middle
;
2110 first_half_end
= current_end
;
2111 second_half_begin
= current_begin
;
2112 second_half_end
= middle
;
2115 xfer
= target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2116 buf
+ (first_half_begin
- begin
),
2118 first_half_end
- first_half_begin
);
2120 if (xfer
== first_half_end
- first_half_begin
)
2122 /* This half reads up fine. So, the error must be in the
2124 current_begin
= second_half_begin
;
2125 current_end
= second_half_end
;
2129 /* This half is not readable. Because we've tried one byte, we
2130 know some part of this half if actually redable. Go to the next
2131 iteration to divide again and try to read.
2133 We don't handle the other half, because this function only tries
2134 to read a single readable subrange. */
2135 current_begin
= first_half_begin
;
2136 current_end
= first_half_end
;
2142 /* The [begin, current_begin) range has been read. */
2144 r
.end
= current_begin
;
2149 /* The [current_end, end) range has been read. */
2150 LONGEST rlen
= end
- current_end
;
2152 r
.data
= xmalloc (rlen
);
2153 memcpy (r
.data
, buf
+ current_end
- begin
, rlen
);
2154 r
.begin
= current_end
;
2158 VEC_safe_push(memory_read_result_s
, (*result
), &r
);
2162 free_memory_read_result_vector (void *x
)
2164 VEC(memory_read_result_s
) *v
= x
;
2165 memory_read_result_s
*current
;
2168 for (ix
= 0; VEC_iterate (memory_read_result_s
, v
, ix
, current
); ++ix
)
2170 xfree (current
->data
);
2172 VEC_free (memory_read_result_s
, v
);
2175 VEC(memory_read_result_s
) *
2176 read_memory_robust (struct target_ops
*ops
, ULONGEST offset
, LONGEST len
)
2178 VEC(memory_read_result_s
) *result
= 0;
2181 while (xfered
< len
)
2183 struct mem_region
*region
= lookup_mem_region (offset
+ xfered
);
2186 /* If there is no explicit region, a fake one should be created. */
2187 gdb_assert (region
);
2189 if (region
->hi
== 0)
2190 rlen
= len
- xfered
;
2192 rlen
= region
->hi
- offset
;
2194 if (region
->attrib
.mode
== MEM_NONE
|| region
->attrib
.mode
== MEM_WO
)
2196 /* Cannot read this region. Note that we can end up here only
2197 if the region is explicitly marked inaccessible, or
2198 'inaccessible-by-default' is in effect. */
2203 LONGEST to_read
= min (len
- xfered
, rlen
);
2204 gdb_byte
*buffer
= (gdb_byte
*)xmalloc (to_read
);
2206 LONGEST xfer
= target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2207 (gdb_byte
*) buffer
,
2208 offset
+ xfered
, to_read
);
2209 /* Call an observer, notifying them of the xfer progress? */
2212 /* Got an error reading full chunk. See if maybe we can read
2215 read_whatever_is_readable (ops
, offset
+ xfered
,
2216 offset
+ xfered
+ to_read
, &result
);
2221 struct memory_read_result r
;
2223 r
.begin
= offset
+ xfered
;
2224 r
.end
= r
.begin
+ xfer
;
2225 VEC_safe_push (memory_read_result_s
, result
, &r
);
2235 /* An alternative to target_write with progress callbacks. */
2238 target_write_with_progress (struct target_ops
*ops
,
2239 enum target_object object
,
2240 const char *annex
, const gdb_byte
*buf
,
2241 ULONGEST offset
, LONGEST len
,
2242 void (*progress
) (ULONGEST
, void *), void *baton
)
2246 /* Give the progress callback a chance to set up. */
2248 (*progress
) (0, baton
);
2250 while (xfered
< len
)
2252 ULONGEST xfered_len
;
2253 enum target_xfer_status status
;
2255 status
= target_write_partial (ops
, object
, annex
,
2256 (gdb_byte
*) buf
+ xfered
,
2257 offset
+ xfered
, len
- xfered
,
2260 if (status
== TARGET_XFER_EOF
)
2262 if (TARGET_XFER_STATUS_ERROR_P (status
))
2265 gdb_assert (status
== TARGET_XFER_OK
);
2267 (*progress
) (xfered_len
, baton
);
2269 xfered
+= xfered_len
;
2275 /* For docs on target_write see target.h. */
2278 target_write (struct target_ops
*ops
,
2279 enum target_object object
,
2280 const char *annex
, const gdb_byte
*buf
,
2281 ULONGEST offset
, LONGEST len
)
2283 return target_write_with_progress (ops
, object
, annex
, buf
, offset
, len
,
2287 /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return
2288 the size of the transferred data. PADDING additional bytes are
2289 available in *BUF_P. This is a helper function for
2290 target_read_alloc; see the declaration of that function for more
2294 target_read_alloc_1 (struct target_ops
*ops
, enum target_object object
,
2295 const char *annex
, gdb_byte
**buf_p
, int padding
)
2297 size_t buf_alloc
, buf_pos
;
2300 /* This function does not have a length parameter; it reads the
2301 entire OBJECT). Also, it doesn't support objects fetched partly
2302 from one target and partly from another (in a different stratum,
2303 e.g. a core file and an executable). Both reasons make it
2304 unsuitable for reading memory. */
2305 gdb_assert (object
!= TARGET_OBJECT_MEMORY
);
2307 /* Start by reading up to 4K at a time. The target will throttle
2308 this number down if necessary. */
2310 buf
= xmalloc (buf_alloc
);
2314 ULONGEST xfered_len
;
2315 enum target_xfer_status status
;
2317 status
= target_read_partial (ops
, object
, annex
, &buf
[buf_pos
],
2318 buf_pos
, buf_alloc
- buf_pos
- padding
,
2321 if (status
== TARGET_XFER_EOF
)
2323 /* Read all there was. */
2330 else if (status
!= TARGET_XFER_OK
)
2332 /* An error occurred. */
2334 return TARGET_XFER_E_IO
;
2337 buf_pos
+= xfered_len
;
2339 /* If the buffer is filling up, expand it. */
2340 if (buf_alloc
< buf_pos
* 2)
2343 buf
= xrealloc (buf
, buf_alloc
);
2350 /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return
2351 the size of the transferred data. See the declaration in "target.h"
2352 function for more information about the return value. */
2355 target_read_alloc (struct target_ops
*ops
, enum target_object object
,
2356 const char *annex
, gdb_byte
**buf_p
)
2358 return target_read_alloc_1 (ops
, object
, annex
, buf_p
, 0);
2361 /* Read OBJECT/ANNEX using OPS. The result is NUL-terminated and
2362 returned as a string, allocated using xmalloc. If an error occurs
2363 or the transfer is unsupported, NULL is returned. Empty objects
2364 are returned as allocated but empty strings. A warning is issued
2365 if the result contains any embedded NUL bytes. */
2368 target_read_stralloc (struct target_ops
*ops
, enum target_object object
,
2373 LONGEST i
, transferred
;
2375 transferred
= target_read_alloc_1 (ops
, object
, annex
, &buffer
, 1);
2376 bufstr
= (char *) buffer
;
2378 if (transferred
< 0)
2381 if (transferred
== 0)
2382 return xstrdup ("");
2384 bufstr
[transferred
] = 0;
2386 /* Check for embedded NUL bytes; but allow trailing NULs. */
2387 for (i
= strlen (bufstr
); i
< transferred
; i
++)
2390 warning (_("target object %d, annex %s, "
2391 "contained unexpected null characters"),
2392 (int) object
, annex
? annex
: "(none)");
2399 /* Memory transfer methods. */
2402 get_target_memory (struct target_ops
*ops
, CORE_ADDR addr
, gdb_byte
*buf
,
2405 /* This method is used to read from an alternate, non-current
2406 target. This read must bypass the overlay support (as symbols
2407 don't match this target), and GDB's internal cache (wrong cache
2408 for this target). */
2409 if (target_read (ops
, TARGET_OBJECT_RAW_MEMORY
, NULL
, buf
, addr
, len
)
2411 memory_error (TARGET_XFER_E_IO
, addr
);
2415 get_target_memory_unsigned (struct target_ops
*ops
, CORE_ADDR addr
,
2416 int len
, enum bfd_endian byte_order
)
2418 gdb_byte buf
[sizeof (ULONGEST
)];
2420 gdb_assert (len
<= sizeof (buf
));
2421 get_target_memory (ops
, addr
, buf
, len
);
2422 return extract_unsigned_integer (buf
, len
, byte_order
);
2428 target_insert_breakpoint (struct gdbarch
*gdbarch
,
2429 struct bp_target_info
*bp_tgt
)
2431 if (!may_insert_breakpoints
)
2433 warning (_("May not insert breakpoints"));
2437 return current_target
.to_insert_breakpoint (¤t_target
,
2444 target_remove_breakpoint (struct gdbarch
*gdbarch
,
2445 struct bp_target_info
*bp_tgt
)
2447 /* This is kind of a weird case to handle, but the permission might
2448 have been changed after breakpoints were inserted - in which case
2449 we should just take the user literally and assume that any
2450 breakpoints should be left in place. */
2451 if (!may_insert_breakpoints
)
2453 warning (_("May not remove breakpoints"));
2457 return current_target
.to_remove_breakpoint (¤t_target
,
2462 target_info (char *args
, int from_tty
)
2464 struct target_ops
*t
;
2465 int has_all_mem
= 0;
2467 if (symfile_objfile
!= NULL
)
2468 printf_unfiltered (_("Symbols from \"%s\".\n"),
2469 objfile_name (symfile_objfile
));
2471 for (t
= target_stack
; t
!= NULL
; t
= t
->beneath
)
2473 if (!(*t
->to_has_memory
) (t
))
2476 if ((int) (t
->to_stratum
) <= (int) dummy_stratum
)
2479 printf_unfiltered (_("\tWhile running this, "
2480 "GDB does not access memory from...\n"));
2481 printf_unfiltered ("%s:\n", t
->to_longname
);
2482 (t
->to_files_info
) (t
);
2483 has_all_mem
= (*t
->to_has_all_memory
) (t
);
2487 /* This function is called before any new inferior is created, e.g.
2488 by running a program, attaching, or connecting to a target.
2489 It cleans up any state from previous invocations which might
2490 change between runs. This is a subset of what target_preopen
2491 resets (things which might change between targets). */
2494 target_pre_inferior (int from_tty
)
2496 /* Clear out solib state. Otherwise the solib state of the previous
2497 inferior might have survived and is entirely wrong for the new
2498 target. This has been observed on GNU/Linux using glibc 2.3. How
2510 Cannot access memory at address 0xdeadbeef
2513 /* In some OSs, the shared library list is the same/global/shared
2514 across inferiors. If code is shared between processes, so are
2515 memory regions and features. */
2516 if (!gdbarch_has_global_solist (target_gdbarch ()))
2518 no_shared_libraries (NULL
, from_tty
);
2520 invalidate_target_mem_regions ();
2522 target_clear_description ();
2525 agent_capability_invalidate ();
2528 /* Callback for iterate_over_inferiors. Gets rid of the given
2532 dispose_inferior (struct inferior
*inf
, void *args
)
2534 struct thread_info
*thread
;
2536 thread
= any_thread_of_process (inf
->pid
);
2539 switch_to_thread (thread
->ptid
);
2541 /* Core inferiors actually should be detached, not killed. */
2542 if (target_has_execution
)
2545 target_detach (NULL
, 0);
2551 /* This is to be called by the open routine before it does
2555 target_preopen (int from_tty
)
2559 if (have_inferiors ())
2562 || !have_live_inferiors ()
2563 || query (_("A program is being debugged already. Kill it? ")))
2564 iterate_over_inferiors (dispose_inferior
, NULL
);
2566 error (_("Program not killed."));
2569 /* Calling target_kill may remove the target from the stack. But if
2570 it doesn't (which seems like a win for UDI), remove it now. */
2571 /* Leave the exec target, though. The user may be switching from a
2572 live process to a core of the same program. */
2573 pop_all_targets_above (file_stratum
);
2575 target_pre_inferior (from_tty
);
2578 /* Detach a target after doing deferred register stores. */
2581 target_detach (const char *args
, int from_tty
)
2583 struct target_ops
* t
;
2585 if (gdbarch_has_global_breakpoints (target_gdbarch ()))
2586 /* Don't remove global breakpoints here. They're removed on
2587 disconnection from the target. */
2590 /* If we're in breakpoints-always-inserted mode, have to remove
2591 them before detaching. */
2592 remove_breakpoints_pid (ptid_get_pid (inferior_ptid
));
2594 prepare_for_detach ();
2596 current_target
.to_detach (¤t_target
, args
, from_tty
);
2598 fprintf_unfiltered (gdb_stdlog
, "target_detach (%s, %d)\n",
2603 target_disconnect (char *args
, int from_tty
)
2605 struct target_ops
*t
;
2607 /* If we're in breakpoints-always-inserted mode or if breakpoints
2608 are global across processes, we have to remove them before
2610 remove_breakpoints ();
2612 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2613 if (t
->to_disconnect
!= NULL
)
2616 fprintf_unfiltered (gdb_stdlog
, "target_disconnect (%s, %d)\n",
2618 t
->to_disconnect (t
, args
, from_tty
);
2626 target_wait (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
2628 struct target_ops
*t
;
2629 ptid_t retval
= (current_target
.to_wait
) (¤t_target
, ptid
,
2634 char *status_string
;
2635 char *options_string
;
2637 status_string
= target_waitstatus_to_string (status
);
2638 options_string
= target_options_to_string (options
);
2639 fprintf_unfiltered (gdb_stdlog
,
2640 "target_wait (%d, status, options={%s})"
2642 ptid_get_pid (ptid
), options_string
,
2643 ptid_get_pid (retval
), status_string
);
2644 xfree (status_string
);
2645 xfree (options_string
);
2652 target_pid_to_str (ptid_t ptid
)
2654 struct target_ops
*t
;
2656 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2658 if (t
->to_pid_to_str
!= NULL
)
2659 return (*t
->to_pid_to_str
) (t
, ptid
);
2662 return normal_pid_to_str (ptid
);
2666 target_thread_name (struct thread_info
*info
)
2668 return current_target
.to_thread_name (¤t_target
, info
);
2672 target_resume (ptid_t ptid
, int step
, enum gdb_signal signal
)
2674 struct target_ops
*t
;
2676 target_dcache_invalidate ();
2678 current_target
.to_resume (¤t_target
, ptid
, step
, signal
);
2680 fprintf_unfiltered (gdb_stdlog
, "target_resume (%d, %s, %s)\n",
2681 ptid_get_pid (ptid
),
2682 step
? "step" : "continue",
2683 gdb_signal_to_name (signal
));
2685 registers_changed_ptid (ptid
);
2686 set_executing (ptid
, 1);
2687 set_running (ptid
, 1);
2688 clear_inline_frame_state (ptid
);
2692 target_pass_signals (int numsigs
, unsigned char *pass_signals
)
2694 struct target_ops
*t
;
2696 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2698 if (t
->to_pass_signals
!= NULL
)
2704 fprintf_unfiltered (gdb_stdlog
, "target_pass_signals (%d, {",
2707 for (i
= 0; i
< numsigs
; i
++)
2708 if (pass_signals
[i
])
2709 fprintf_unfiltered (gdb_stdlog
, " %s",
2710 gdb_signal_to_name (i
));
2712 fprintf_unfiltered (gdb_stdlog
, " })\n");
2715 (*t
->to_pass_signals
) (t
, numsigs
, pass_signals
);
2722 target_program_signals (int numsigs
, unsigned char *program_signals
)
2724 struct target_ops
*t
;
2726 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2728 if (t
->to_program_signals
!= NULL
)
2734 fprintf_unfiltered (gdb_stdlog
, "target_program_signals (%d, {",
2737 for (i
= 0; i
< numsigs
; i
++)
2738 if (program_signals
[i
])
2739 fprintf_unfiltered (gdb_stdlog
, " %s",
2740 gdb_signal_to_name (i
));
2742 fprintf_unfiltered (gdb_stdlog
, " })\n");
2745 (*t
->to_program_signals
) (t
, numsigs
, program_signals
);
2751 /* Look through the list of possible targets for a target that can
2755 target_follow_fork (int follow_child
, int detach_fork
)
2757 struct target_ops
*t
;
2759 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2761 if (t
->to_follow_fork
!= NULL
)
2763 int retval
= t
->to_follow_fork (t
, follow_child
, detach_fork
);
2766 fprintf_unfiltered (gdb_stdlog
,
2767 "target_follow_fork (%d, %d) = %d\n",
2768 follow_child
, detach_fork
, retval
);
2773 /* Some target returned a fork event, but did not know how to follow it. */
2774 internal_error (__FILE__
, __LINE__
,
2775 _("could not find a target to follow fork"));
2779 target_mourn_inferior (void)
2781 struct target_ops
*t
;
2783 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2785 if (t
->to_mourn_inferior
!= NULL
)
2787 t
->to_mourn_inferior (t
);
2789 fprintf_unfiltered (gdb_stdlog
, "target_mourn_inferior ()\n");
2791 /* We no longer need to keep handles on any of the object files.
2792 Make sure to release them to avoid unnecessarily locking any
2793 of them while we're not actually debugging. */
2794 bfd_cache_close_all ();
2800 internal_error (__FILE__
, __LINE__
,
2801 _("could not find a target to follow mourn inferior"));
2804 /* Look for a target which can describe architectural features, starting
2805 from TARGET. If we find one, return its description. */
2807 const struct target_desc
*
2808 target_read_description (struct target_ops
*target
)
2810 struct target_ops
*t
;
2812 for (t
= target
; t
!= NULL
; t
= t
->beneath
)
2813 if (t
->to_read_description
!= NULL
)
2815 const struct target_desc
*tdesc
;
2817 tdesc
= t
->to_read_description (t
);
2825 /* The default implementation of to_search_memory.
2826 This implements a basic search of memory, reading target memory and
2827 performing the search here (as opposed to performing the search in on the
2828 target side with, for example, gdbserver). */
2831 simple_search_memory (struct target_ops
*ops
,
2832 CORE_ADDR start_addr
, ULONGEST search_space_len
,
2833 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2834 CORE_ADDR
*found_addrp
)
2836 /* NOTE: also defined in find.c testcase. */
2837 #define SEARCH_CHUNK_SIZE 16000
2838 const unsigned chunk_size
= SEARCH_CHUNK_SIZE
;
2839 /* Buffer to hold memory contents for searching. */
2840 gdb_byte
*search_buf
;
2841 unsigned search_buf_size
;
2842 struct cleanup
*old_cleanups
;
2844 search_buf_size
= chunk_size
+ pattern_len
- 1;
2846 /* No point in trying to allocate a buffer larger than the search space. */
2847 if (search_space_len
< search_buf_size
)
2848 search_buf_size
= search_space_len
;
2850 search_buf
= malloc (search_buf_size
);
2851 if (search_buf
== NULL
)
2852 error (_("Unable to allocate memory to perform the search."));
2853 old_cleanups
= make_cleanup (free_current_contents
, &search_buf
);
2855 /* Prime the search buffer. */
2857 if (target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2858 search_buf
, start_addr
, search_buf_size
) != search_buf_size
)
2860 warning (_("Unable to access %s bytes of target "
2861 "memory at %s, halting search."),
2862 pulongest (search_buf_size
), hex_string (start_addr
));
2863 do_cleanups (old_cleanups
);
2867 /* Perform the search.
2869 The loop is kept simple by allocating [N + pattern-length - 1] bytes.
2870 When we've scanned N bytes we copy the trailing bytes to the start and
2871 read in another N bytes. */
2873 while (search_space_len
>= pattern_len
)
2875 gdb_byte
*found_ptr
;
2876 unsigned nr_search_bytes
= min (search_space_len
, search_buf_size
);
2878 found_ptr
= memmem (search_buf
, nr_search_bytes
,
2879 pattern
, pattern_len
);
2881 if (found_ptr
!= NULL
)
2883 CORE_ADDR found_addr
= start_addr
+ (found_ptr
- search_buf
);
2885 *found_addrp
= found_addr
;
2886 do_cleanups (old_cleanups
);
2890 /* Not found in this chunk, skip to next chunk. */
2892 /* Don't let search_space_len wrap here, it's unsigned. */
2893 if (search_space_len
>= chunk_size
)
2894 search_space_len
-= chunk_size
;
2896 search_space_len
= 0;
2898 if (search_space_len
>= pattern_len
)
2900 unsigned keep_len
= search_buf_size
- chunk_size
;
2901 CORE_ADDR read_addr
= start_addr
+ chunk_size
+ keep_len
;
2904 /* Copy the trailing part of the previous iteration to the front
2905 of the buffer for the next iteration. */
2906 gdb_assert (keep_len
== pattern_len
- 1);
2907 memcpy (search_buf
, search_buf
+ chunk_size
, keep_len
);
2909 nr_to_read
= min (search_space_len
- keep_len
, chunk_size
);
2911 if (target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2912 search_buf
+ keep_len
, read_addr
,
2913 nr_to_read
) != nr_to_read
)
2915 warning (_("Unable to access %s bytes of target "
2916 "memory at %s, halting search."),
2917 plongest (nr_to_read
),
2918 hex_string (read_addr
));
2919 do_cleanups (old_cleanups
);
2923 start_addr
+= chunk_size
;
2929 do_cleanups (old_cleanups
);
2933 /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the
2934 sequence of bytes in PATTERN with length PATTERN_LEN.
2936 The result is 1 if found, 0 if not found, and -1 if there was an error
2937 requiring halting of the search (e.g. memory read error).
2938 If the pattern is found the address is recorded in FOUND_ADDRP. */
2941 target_search_memory (CORE_ADDR start_addr
, ULONGEST search_space_len
,
2942 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2943 CORE_ADDR
*found_addrp
)
2945 struct target_ops
*t
;
2948 /* We don't use INHERIT to set current_target.to_search_memory,
2949 so we have to scan the target stack and handle targetdebug
2953 fprintf_unfiltered (gdb_stdlog
, "target_search_memory (%s, ...)\n",
2954 hex_string (start_addr
));
2956 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2957 if (t
->to_search_memory
!= NULL
)
2962 found
= t
->to_search_memory (t
, start_addr
, search_space_len
,
2963 pattern
, pattern_len
, found_addrp
);
2967 /* If a special version of to_search_memory isn't available, use the
2969 found
= simple_search_memory (current_target
.beneath
,
2970 start_addr
, search_space_len
,
2971 pattern
, pattern_len
, found_addrp
);
2975 fprintf_unfiltered (gdb_stdlog
, " = %d\n", found
);
2980 /* Look through the currently pushed targets. If none of them will
2981 be able to restart the currently running process, issue an error
2985 target_require_runnable (void)
2987 struct target_ops
*t
;
2989 for (t
= target_stack
; t
!= NULL
; t
= t
->beneath
)
2991 /* If this target knows how to create a new program, then
2992 assume we will still be able to after killing the current
2993 one. Either killing and mourning will not pop T, or else
2994 find_default_run_target will find it again. */
2995 if (t
->to_create_inferior
!= NULL
)
2998 /* Do not worry about thread_stratum targets that can not
2999 create inferiors. Assume they will be pushed again if
3000 necessary, and continue to the process_stratum. */
3001 if (t
->to_stratum
== thread_stratum
3002 || t
->to_stratum
== arch_stratum
)
3005 error (_("The \"%s\" target does not support \"run\". "
3006 "Try \"help target\" or \"continue\"."),
3010 /* This function is only called if the target is running. In that
3011 case there should have been a process_stratum target and it
3012 should either know how to create inferiors, or not... */
3013 internal_error (__FILE__
, __LINE__
, _("No targets found"));
3016 /* Look through the list of possible targets for a target that can
3017 execute a run or attach command without any other data. This is
3018 used to locate the default process stratum.
3020 If DO_MESG is not NULL, the result is always valid (error() is
3021 called for errors); else, return NULL on error. */
3023 static struct target_ops
*
3024 find_default_run_target (char *do_mesg
)
3026 struct target_ops
**t
;
3027 struct target_ops
*runable
= NULL
;
3032 for (t
= target_structs
; t
< target_structs
+ target_struct_size
;
3035 if ((*t
)->to_can_run
&& target_can_run (*t
))
3045 error (_("Don't know how to %s. Try \"help target\"."), do_mesg
);
3054 find_default_attach (struct target_ops
*ops
, char *args
, int from_tty
)
3056 struct target_ops
*t
;
3058 t
= find_default_run_target ("attach");
3059 (t
->to_attach
) (t
, args
, from_tty
);
3064 find_default_create_inferior (struct target_ops
*ops
,
3065 char *exec_file
, char *allargs
, char **env
,
3068 struct target_ops
*t
;
3070 t
= find_default_run_target ("run");
3071 (t
->to_create_inferior
) (t
, exec_file
, allargs
, env
, from_tty
);
3076 find_default_can_async_p (struct target_ops
*ignore
)
3078 struct target_ops
*t
;
3080 /* This may be called before the target is pushed on the stack;
3081 look for the default process stratum. If there's none, gdb isn't
3082 configured with a native debugger, and target remote isn't
3084 t
= find_default_run_target (NULL
);
3085 if (t
&& t
->to_can_async_p
!= delegate_can_async_p
)
3086 return (t
->to_can_async_p
) (t
);
3091 find_default_is_async_p (struct target_ops
*ignore
)
3093 struct target_ops
*t
;
3095 /* This may be called before the target is pushed on the stack;
3096 look for the default process stratum. If there's none, gdb isn't
3097 configured with a native debugger, and target remote isn't
3099 t
= find_default_run_target (NULL
);
3100 if (t
&& t
->to_is_async_p
!= delegate_is_async_p
)
3101 return (t
->to_is_async_p
) (t
);
3106 find_default_supports_non_stop (struct target_ops
*self
)
3108 struct target_ops
*t
;
3110 t
= find_default_run_target (NULL
);
3111 if (t
&& t
->to_supports_non_stop
)
3112 return (t
->to_supports_non_stop
) (t
);
3117 target_supports_non_stop (void)
3119 struct target_ops
*t
;
3121 for (t
= ¤t_target
; t
!= NULL
; t
= t
->beneath
)
3122 if (t
->to_supports_non_stop
)
3123 return t
->to_supports_non_stop (t
);
3128 /* Implement the "info proc" command. */
3131 target_info_proc (char *args
, enum info_proc_what what
)
3133 struct target_ops
*t
;
3135 /* If we're already connected to something that can get us OS
3136 related data, use it. Otherwise, try using the native
3138 if (current_target
.to_stratum
>= process_stratum
)
3139 t
= current_target
.beneath
;
3141 t
= find_default_run_target (NULL
);
3143 for (; t
!= NULL
; t
= t
->beneath
)
3145 if (t
->to_info_proc
!= NULL
)
3147 t
->to_info_proc (t
, args
, what
);
3150 fprintf_unfiltered (gdb_stdlog
,
3151 "target_info_proc (\"%s\", %d)\n", args
, what
);
3161 find_default_supports_disable_randomization (struct target_ops
*self
)
3163 struct target_ops
*t
;
3165 t
= find_default_run_target (NULL
);
3166 if (t
&& t
->to_supports_disable_randomization
)
3167 return (t
->to_supports_disable_randomization
) (t
);
3172 target_supports_disable_randomization (void)
3174 struct target_ops
*t
;
3176 for (t
= ¤t_target
; t
!= NULL
; t
= t
->beneath
)
3177 if (t
->to_supports_disable_randomization
)
3178 return t
->to_supports_disable_randomization (t
);
3184 target_get_osdata (const char *type
)
3186 struct target_ops
*t
;
3188 /* If we're already connected to something that can get us OS
3189 related data, use it. Otherwise, try using the native
3191 if (current_target
.to_stratum
>= process_stratum
)
3192 t
= current_target
.beneath
;
3194 t
= find_default_run_target ("get OS data");
3199 return target_read_stralloc (t
, TARGET_OBJECT_OSDATA
, type
);
3202 /* Determine the current address space of thread PTID. */
3204 struct address_space
*
3205 target_thread_address_space (ptid_t ptid
)
3207 struct address_space
*aspace
;
3208 struct inferior
*inf
;
3209 struct target_ops
*t
;
3211 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3213 if (t
->to_thread_address_space
!= NULL
)
3215 aspace
= t
->to_thread_address_space (t
, ptid
);
3216 gdb_assert (aspace
);
3219 fprintf_unfiltered (gdb_stdlog
,
3220 "target_thread_address_space (%s) = %d\n",
3221 target_pid_to_str (ptid
),
3222 address_space_num (aspace
));
3227 /* Fall-back to the "main" address space of the inferior. */
3228 inf
= find_inferior_pid (ptid_get_pid (ptid
));
3230 if (inf
== NULL
|| inf
->aspace
== NULL
)
3231 internal_error (__FILE__
, __LINE__
,
3232 _("Can't determine the current "
3233 "address space of thread %s\n"),
3234 target_pid_to_str (ptid
));
3240 /* Target file operations. */
3242 static struct target_ops
*
3243 default_fileio_target (void)
3245 /* If we're already connected to something that can perform
3246 file I/O, use it. Otherwise, try using the native target. */
3247 if (current_target
.to_stratum
>= process_stratum
)
3248 return current_target
.beneath
;
3250 return find_default_run_target ("file I/O");
3253 /* Open FILENAME on the target, using FLAGS and MODE. Return a
3254 target file descriptor, or -1 if an error occurs (and set
3257 target_fileio_open (const char *filename
, int flags
, int mode
,
3260 struct target_ops
*t
;
3262 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
3264 if (t
->to_fileio_open
!= NULL
)
3266 int fd
= t
->to_fileio_open (t
, filename
, flags
, mode
, target_errno
);
3269 fprintf_unfiltered (gdb_stdlog
,
3270 "target_fileio_open (%s,0x%x,0%o) = %d (%d)\n",
3271 filename
, flags
, mode
,
3272 fd
, fd
!= -1 ? 0 : *target_errno
);
3277 *target_errno
= FILEIO_ENOSYS
;
3281 /* Write up to LEN bytes from WRITE_BUF to FD on the target.
3282 Return the number of bytes written, or -1 if an error occurs
3283 (and set *TARGET_ERRNO). */
3285 target_fileio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
3286 ULONGEST offset
, int *target_errno
)
3288 struct target_ops
*t
;
3290 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
3292 if (t
->to_fileio_pwrite
!= NULL
)
3294 int ret
= t
->to_fileio_pwrite (t
, fd
, write_buf
, len
, offset
,
3298 fprintf_unfiltered (gdb_stdlog
,
3299 "target_fileio_pwrite (%d,...,%d,%s) "
3301 fd
, len
, pulongest (offset
),
3302 ret
, ret
!= -1 ? 0 : *target_errno
);
3307 *target_errno
= FILEIO_ENOSYS
;
3311 /* Read up to LEN bytes FD on the target into READ_BUF.
3312 Return the number of bytes read, or -1 if an error occurs
3313 (and set *TARGET_ERRNO). */
3315 target_fileio_pread (int fd
, gdb_byte
*read_buf
, int len
,
3316 ULONGEST offset
, int *target_errno
)
3318 struct target_ops
*t
;
3320 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
3322 if (t
->to_fileio_pread
!= NULL
)
3324 int ret
= t
->to_fileio_pread (t
, fd
, read_buf
, len
, offset
,
3328 fprintf_unfiltered (gdb_stdlog
,
3329 "target_fileio_pread (%d,...,%d,%s) "
3331 fd
, len
, pulongest (offset
),
3332 ret
, ret
!= -1 ? 0 : *target_errno
);
3337 *target_errno
= FILEIO_ENOSYS
;
3341 /* Close FD on the target. Return 0, or -1 if an error occurs
3342 (and set *TARGET_ERRNO). */
3344 target_fileio_close (int fd
, int *target_errno
)
3346 struct target_ops
*t
;
3348 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
3350 if (t
->to_fileio_close
!= NULL
)
3352 int ret
= t
->to_fileio_close (t
, fd
, target_errno
);
3355 fprintf_unfiltered (gdb_stdlog
,
3356 "target_fileio_close (%d) = %d (%d)\n",
3357 fd
, ret
, ret
!= -1 ? 0 : *target_errno
);
3362 *target_errno
= FILEIO_ENOSYS
;
3366 /* Unlink FILENAME on the target. Return 0, or -1 if an error
3367 occurs (and set *TARGET_ERRNO). */
3369 target_fileio_unlink (const char *filename
, int *target_errno
)
3371 struct target_ops
*t
;
3373 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
3375 if (t
->to_fileio_unlink
!= NULL
)
3377 int ret
= t
->to_fileio_unlink (t
, filename
, target_errno
);
3380 fprintf_unfiltered (gdb_stdlog
,
3381 "target_fileio_unlink (%s) = %d (%d)\n",
3382 filename
, ret
, ret
!= -1 ? 0 : *target_errno
);
3387 *target_errno
= FILEIO_ENOSYS
;
3391 /* Read value of symbolic link FILENAME on the target. Return a
3392 null-terminated string allocated via xmalloc, or NULL if an error
3393 occurs (and set *TARGET_ERRNO). */
3395 target_fileio_readlink (const char *filename
, int *target_errno
)
3397 struct target_ops
*t
;
3399 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
3401 if (t
->to_fileio_readlink
!= NULL
)
3403 char *ret
= t
->to_fileio_readlink (t
, filename
, target_errno
);
3406 fprintf_unfiltered (gdb_stdlog
,
3407 "target_fileio_readlink (%s) = %s (%d)\n",
3408 filename
, ret
? ret
: "(nil)",
3409 ret
? 0 : *target_errno
);
3414 *target_errno
= FILEIO_ENOSYS
;
3419 target_fileio_close_cleanup (void *opaque
)
3421 int fd
= *(int *) opaque
;
3424 target_fileio_close (fd
, &target_errno
);
3427 /* Read target file FILENAME. Store the result in *BUF_P and
3428 return the size of the transferred data. PADDING additional bytes are
3429 available in *BUF_P. This is a helper function for
3430 target_fileio_read_alloc; see the declaration of that function for more
3434 target_fileio_read_alloc_1 (const char *filename
,
3435 gdb_byte
**buf_p
, int padding
)
3437 struct cleanup
*close_cleanup
;
3438 size_t buf_alloc
, buf_pos
;
3444 fd
= target_fileio_open (filename
, FILEIO_O_RDONLY
, 0700, &target_errno
);
3448 close_cleanup
= make_cleanup (target_fileio_close_cleanup
, &fd
);
3450 /* Start by reading up to 4K at a time. The target will throttle
3451 this number down if necessary. */
3453 buf
= xmalloc (buf_alloc
);
3457 n
= target_fileio_pread (fd
, &buf
[buf_pos
],
3458 buf_alloc
- buf_pos
- padding
, buf_pos
,
3462 /* An error occurred. */
3463 do_cleanups (close_cleanup
);
3469 /* Read all there was. */
3470 do_cleanups (close_cleanup
);
3480 /* If the buffer is filling up, expand it. */
3481 if (buf_alloc
< buf_pos
* 2)
3484 buf
= xrealloc (buf
, buf_alloc
);
3491 /* Read target file FILENAME. Store the result in *BUF_P and return
3492 the size of the transferred data. See the declaration in "target.h"
3493 function for more information about the return value. */
3496 target_fileio_read_alloc (const char *filename
, gdb_byte
**buf_p
)
3498 return target_fileio_read_alloc_1 (filename
, buf_p
, 0);
3501 /* Read target file FILENAME. The result is NUL-terminated and
3502 returned as a string, allocated using xmalloc. If an error occurs
3503 or the transfer is unsupported, NULL is returned. Empty objects
3504 are returned as allocated but empty strings. A warning is issued
3505 if the result contains any embedded NUL bytes. */
3508 target_fileio_read_stralloc (const char *filename
)
3512 LONGEST i
, transferred
;
3514 transferred
= target_fileio_read_alloc_1 (filename
, &buffer
, 1);
3515 bufstr
= (char *) buffer
;
3517 if (transferred
< 0)
3520 if (transferred
== 0)
3521 return xstrdup ("");
3523 bufstr
[transferred
] = 0;
3525 /* Check for embedded NUL bytes; but allow trailing NULs. */
3526 for (i
= strlen (bufstr
); i
< transferred
; i
++)
3529 warning (_("target file %s "
3530 "contained unexpected null characters"),
3540 default_region_ok_for_hw_watchpoint (struct target_ops
*self
,
3541 CORE_ADDR addr
, int len
)
3543 return (len
<= gdbarch_ptr_bit (target_gdbarch ()) / TARGET_CHAR_BIT
);
3547 default_watchpoint_addr_within_range (struct target_ops
*target
,
3549 CORE_ADDR start
, int length
)
3551 return addr
>= start
&& addr
< start
+ length
;
3554 static struct gdbarch
*
3555 default_thread_architecture (struct target_ops
*ops
, ptid_t ptid
)
3557 return target_gdbarch ();
3567 return_minus_one (void)
3579 * Find the next target down the stack from the specified target.
3583 find_target_beneath (struct target_ops
*t
)
3591 find_target_at (enum strata stratum
)
3593 struct target_ops
*t
;
3595 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3596 if (t
->to_stratum
== stratum
)
3603 /* The inferior process has died. Long live the inferior! */
3606 generic_mourn_inferior (void)
3610 ptid
= inferior_ptid
;
3611 inferior_ptid
= null_ptid
;
3613 /* Mark breakpoints uninserted in case something tries to delete a
3614 breakpoint while we delete the inferior's threads (which would
3615 fail, since the inferior is long gone). */
3616 mark_breakpoints_out ();
3618 if (!ptid_equal (ptid
, null_ptid
))
3620 int pid
= ptid_get_pid (ptid
);
3621 exit_inferior (pid
);
3624 /* Note this wipes step-resume breakpoints, so needs to be done
3625 after exit_inferior, which ends up referencing the step-resume
3626 breakpoints through clear_thread_inferior_resources. */
3627 breakpoint_init_inferior (inf_exited
);
3629 registers_changed ();
3631 reopen_exec_file ();
3632 reinit_frame_cache ();
3634 if (deprecated_detach_hook
)
3635 deprecated_detach_hook ();
3638 /* Convert a normal process ID to a string. Returns the string in a
3642 normal_pid_to_str (ptid_t ptid
)
3644 static char buf
[32];
3646 xsnprintf (buf
, sizeof buf
, "process %d", ptid_get_pid (ptid
));
3651 dummy_pid_to_str (struct target_ops
*ops
, ptid_t ptid
)
3653 return normal_pid_to_str (ptid
);
3656 /* Error-catcher for target_find_memory_regions. */
3658 dummy_find_memory_regions (struct target_ops
*self
,
3659 find_memory_region_ftype ignore1
, void *ignore2
)
3661 error (_("Command not implemented for this target."));
3665 /* Error-catcher for target_make_corefile_notes. */
3667 dummy_make_corefile_notes (struct target_ops
*self
,
3668 bfd
*ignore1
, int *ignore2
)
3670 error (_("Command not implemented for this target."));
3674 /* Set up the handful of non-empty slots needed by the dummy target
3678 init_dummy_target (void)
3680 dummy_target
.to_shortname
= "None";
3681 dummy_target
.to_longname
= "None";
3682 dummy_target
.to_doc
= "";
3683 dummy_target
.to_create_inferior
= find_default_create_inferior
;
3684 dummy_target
.to_supports_non_stop
= find_default_supports_non_stop
;
3685 dummy_target
.to_supports_disable_randomization
3686 = find_default_supports_disable_randomization
;
3687 dummy_target
.to_pid_to_str
= dummy_pid_to_str
;
3688 dummy_target
.to_stratum
= dummy_stratum
;
3689 dummy_target
.to_has_all_memory
= (int (*) (struct target_ops
*)) return_zero
;
3690 dummy_target
.to_has_memory
= (int (*) (struct target_ops
*)) return_zero
;
3691 dummy_target
.to_has_stack
= (int (*) (struct target_ops
*)) return_zero
;
3692 dummy_target
.to_has_registers
= (int (*) (struct target_ops
*)) return_zero
;
3693 dummy_target
.to_has_execution
3694 = (int (*) (struct target_ops
*, ptid_t
)) return_zero
;
3695 dummy_target
.to_magic
= OPS_MAGIC
;
3697 install_dummy_methods (&dummy_target
);
3701 debug_to_open (char *args
, int from_tty
)
3703 debug_target
.to_open (args
, from_tty
);
3705 fprintf_unfiltered (gdb_stdlog
, "target_open (%s, %d)\n", args
, from_tty
);
3709 target_close (struct target_ops
*targ
)
3711 gdb_assert (!target_is_pushed (targ
));
3713 if (targ
->to_xclose
!= NULL
)
3714 targ
->to_xclose (targ
);
3715 else if (targ
->to_close
!= NULL
)
3716 targ
->to_close (targ
);
3719 fprintf_unfiltered (gdb_stdlog
, "target_close ()\n");
3723 target_attach (char *args
, int from_tty
)
3725 current_target
.to_attach (¤t_target
, args
, from_tty
);
3727 fprintf_unfiltered (gdb_stdlog
, "target_attach (%s, %d)\n",
3732 target_thread_alive (ptid_t ptid
)
3734 struct target_ops
*t
;
3736 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3738 if (t
->to_thread_alive
!= NULL
)
3742 retval
= t
->to_thread_alive (t
, ptid
);
3744 fprintf_unfiltered (gdb_stdlog
, "target_thread_alive (%d) = %d\n",
3745 ptid_get_pid (ptid
), retval
);
3755 target_find_new_threads (void)
3757 struct target_ops
*t
;
3759 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3761 if (t
->to_find_new_threads
!= NULL
)
3763 t
->to_find_new_threads (t
);
3765 fprintf_unfiltered (gdb_stdlog
, "target_find_new_threads ()\n");
3773 target_stop (ptid_t ptid
)
3777 warning (_("May not interrupt or stop the target, ignoring attempt"));
3781 (*current_target
.to_stop
) (¤t_target
, ptid
);
3785 debug_to_post_attach (struct target_ops
*self
, int pid
)
3787 debug_target
.to_post_attach (&debug_target
, pid
);
3789 fprintf_unfiltered (gdb_stdlog
, "target_post_attach (%d)\n", pid
);
3792 /* Concatenate ELEM to LIST, a comma separate list, and return the
3793 result. The LIST incoming argument is released. */
3796 str_comma_list_concat_elem (char *list
, const char *elem
)
3799 return xstrdup (elem
);
3801 return reconcat (list
, list
, ", ", elem
, (char *) NULL
);
3804 /* Helper for target_options_to_string. If OPT is present in
3805 TARGET_OPTIONS, append the OPT_STR (string version of OPT) in RET.
3806 Returns the new resulting string. OPT is removed from
3810 do_option (int *target_options
, char *ret
,
3811 int opt
, char *opt_str
)
3813 if ((*target_options
& opt
) != 0)
3815 ret
= str_comma_list_concat_elem (ret
, opt_str
);
3816 *target_options
&= ~opt
;
3823 target_options_to_string (int target_options
)
3827 #define DO_TARG_OPTION(OPT) \
3828 ret = do_option (&target_options, ret, OPT, #OPT)
3830 DO_TARG_OPTION (TARGET_WNOHANG
);
3832 if (target_options
!= 0)
3833 ret
= str_comma_list_concat_elem (ret
, "unknown???");
3841 debug_print_register (const char * func
,
3842 struct regcache
*regcache
, int regno
)
3844 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
3846 fprintf_unfiltered (gdb_stdlog
, "%s ", func
);
3847 if (regno
>= 0 && regno
< gdbarch_num_regs (gdbarch
)
3848 && gdbarch_register_name (gdbarch
, regno
) != NULL
3849 && gdbarch_register_name (gdbarch
, regno
)[0] != '\0')
3850 fprintf_unfiltered (gdb_stdlog
, "(%s)",
3851 gdbarch_register_name (gdbarch
, regno
));
3853 fprintf_unfiltered (gdb_stdlog
, "(%d)", regno
);
3854 if (regno
>= 0 && regno
< gdbarch_num_regs (gdbarch
))
3856 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
3857 int i
, size
= register_size (gdbarch
, regno
);
3858 gdb_byte buf
[MAX_REGISTER_SIZE
];
3860 regcache_raw_collect (regcache
, regno
, buf
);
3861 fprintf_unfiltered (gdb_stdlog
, " = ");
3862 for (i
= 0; i
< size
; i
++)
3864 fprintf_unfiltered (gdb_stdlog
, "%02x", buf
[i
]);
3866 if (size
<= sizeof (LONGEST
))
3868 ULONGEST val
= extract_unsigned_integer (buf
, size
, byte_order
);
3870 fprintf_unfiltered (gdb_stdlog
, " %s %s",
3871 core_addr_to_string_nz (val
), plongest (val
));
3874 fprintf_unfiltered (gdb_stdlog
, "\n");
3878 target_fetch_registers (struct regcache
*regcache
, int regno
)
3880 struct target_ops
*t
;
3882 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3884 if (t
->to_fetch_registers
!= NULL
)
3886 t
->to_fetch_registers (t
, regcache
, regno
);
3888 debug_print_register ("target_fetch_registers", regcache
, regno
);
3895 target_store_registers (struct regcache
*regcache
, int regno
)
3897 struct target_ops
*t
;
3899 if (!may_write_registers
)
3900 error (_("Writing to registers is not allowed (regno %d)"), regno
);
3902 current_target
.to_store_registers (¤t_target
, regcache
, regno
);
3905 debug_print_register ("target_store_registers", regcache
, regno
);
3910 target_core_of_thread (ptid_t ptid
)
3912 struct target_ops
*t
;
3914 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3916 if (t
->to_core_of_thread
!= NULL
)
3918 int retval
= t
->to_core_of_thread (t
, ptid
);
3921 fprintf_unfiltered (gdb_stdlog
,
3922 "target_core_of_thread (%d) = %d\n",
3923 ptid_get_pid (ptid
), retval
);
3932 target_verify_memory (const gdb_byte
*data
, CORE_ADDR memaddr
, ULONGEST size
)
3934 struct target_ops
*t
;
3936 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3938 if (t
->to_verify_memory
!= NULL
)
3940 int retval
= t
->to_verify_memory (t
, data
, memaddr
, size
);
3943 fprintf_unfiltered (gdb_stdlog
,
3944 "target_verify_memory (%s, %s) = %d\n",
3945 paddress (target_gdbarch (), memaddr
),
3955 /* The documentation for this function is in its prototype declaration in
3959 target_insert_mask_watchpoint (CORE_ADDR addr
, CORE_ADDR mask
, int rw
)
3961 struct target_ops
*t
;
3963 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3964 if (t
->to_insert_mask_watchpoint
!= NULL
)
3968 ret
= t
->to_insert_mask_watchpoint (t
, addr
, mask
, rw
);
3971 fprintf_unfiltered (gdb_stdlog
, "\
3972 target_insert_mask_watchpoint (%s, %s, %d) = %d\n",
3973 core_addr_to_string (addr
),
3974 core_addr_to_string (mask
), rw
, ret
);
3982 /* The documentation for this function is in its prototype declaration in
3986 target_remove_mask_watchpoint (CORE_ADDR addr
, CORE_ADDR mask
, int rw
)
3988 struct target_ops
*t
;
3990 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3991 if (t
->to_remove_mask_watchpoint
!= NULL
)
3995 ret
= t
->to_remove_mask_watchpoint (t
, addr
, mask
, rw
);
3998 fprintf_unfiltered (gdb_stdlog
, "\
3999 target_remove_mask_watchpoint (%s, %s, %d) = %d\n",
4000 core_addr_to_string (addr
),
4001 core_addr_to_string (mask
), rw
, ret
);
4009 /* The documentation for this function is in its prototype declaration
4013 target_masked_watch_num_registers (CORE_ADDR addr
, CORE_ADDR mask
)
4015 struct target_ops
*t
;
4017 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4018 if (t
->to_masked_watch_num_registers
!= NULL
)
4019 return t
->to_masked_watch_num_registers (t
, addr
, mask
);
4024 /* The documentation for this function is in its prototype declaration
4028 target_ranged_break_num_registers (void)
4030 struct target_ops
*t
;
4032 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4033 if (t
->to_ranged_break_num_registers
!= NULL
)
4034 return t
->to_ranged_break_num_registers (t
);
4041 struct btrace_target_info
*
4042 target_enable_btrace (ptid_t ptid
)
4044 struct target_ops
*t
;
4046 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4047 if (t
->to_enable_btrace
!= NULL
)
4048 return t
->to_enable_btrace (t
, ptid
);
4057 target_disable_btrace (struct btrace_target_info
*btinfo
)
4059 struct target_ops
*t
;
4061 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4062 if (t
->to_disable_btrace
!= NULL
)
4064 t
->to_disable_btrace (t
, btinfo
);
4074 target_teardown_btrace (struct btrace_target_info
*btinfo
)
4076 struct target_ops
*t
;
4078 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4079 if (t
->to_teardown_btrace
!= NULL
)
4081 t
->to_teardown_btrace (t
, btinfo
);
4091 target_read_btrace (VEC (btrace_block_s
) **btrace
,
4092 struct btrace_target_info
*btinfo
,
4093 enum btrace_read_type type
)
4095 struct target_ops
*t
;
4097 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4098 if (t
->to_read_btrace
!= NULL
)
4099 return t
->to_read_btrace (t
, btrace
, btinfo
, type
);
4102 return BTRACE_ERR_NOT_SUPPORTED
;
4108 target_stop_recording (void)
4110 struct target_ops
*t
;
4112 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4113 if (t
->to_stop_recording
!= NULL
)
4115 t
->to_stop_recording (t
);
4119 /* This is optional. */
4125 target_info_record (void)
4127 struct target_ops
*t
;
4129 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4130 if (t
->to_info_record
!= NULL
)
4132 t
->to_info_record (t
);
4142 target_save_record (const char *filename
)
4144 struct target_ops
*t
;
4146 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4147 if (t
->to_save_record
!= NULL
)
4149 t
->to_save_record (t
, filename
);
4159 target_supports_delete_record (void)
4161 struct target_ops
*t
;
4163 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4164 if (t
->to_delete_record
!= NULL
)
4173 target_delete_record (void)
4175 struct target_ops
*t
;
4177 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4178 if (t
->to_delete_record
!= NULL
)
4180 t
->to_delete_record (t
);
4190 target_record_is_replaying (void)
4192 struct target_ops
*t
;
4194 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4195 if (t
->to_record_is_replaying
!= NULL
)
4196 return t
->to_record_is_replaying (t
);
4204 target_goto_record_begin (void)
4206 struct target_ops
*t
;
4208 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4209 if (t
->to_goto_record_begin
!= NULL
)
4211 t
->to_goto_record_begin (t
);
4221 target_goto_record_end (void)
4223 struct target_ops
*t
;
4225 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4226 if (t
->to_goto_record_end
!= NULL
)
4228 t
->to_goto_record_end (t
);
4238 target_goto_record (ULONGEST insn
)
4240 struct target_ops
*t
;
4242 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4243 if (t
->to_goto_record
!= NULL
)
4245 t
->to_goto_record (t
, insn
);
4255 target_insn_history (int size
, int flags
)
4257 struct target_ops
*t
;
4259 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4260 if (t
->to_insn_history
!= NULL
)
4262 t
->to_insn_history (t
, size
, flags
);
4272 target_insn_history_from (ULONGEST from
, int size
, int flags
)
4274 struct target_ops
*t
;
4276 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4277 if (t
->to_insn_history_from
!= NULL
)
4279 t
->to_insn_history_from (t
, from
, size
, flags
);
4289 target_insn_history_range (ULONGEST begin
, ULONGEST end
, int flags
)
4291 struct target_ops
*t
;
4293 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4294 if (t
->to_insn_history_range
!= NULL
)
4296 t
->to_insn_history_range (t
, begin
, end
, flags
);
4306 target_call_history (int size
, int flags
)
4308 struct target_ops
*t
;
4310 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4311 if (t
->to_call_history
!= NULL
)
4313 t
->to_call_history (t
, size
, flags
);
4323 target_call_history_from (ULONGEST begin
, int size
, int flags
)
4325 struct target_ops
*t
;
4327 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4328 if (t
->to_call_history_from
!= NULL
)
4330 t
->to_call_history_from (t
, begin
, size
, flags
);
4340 target_call_history_range (ULONGEST begin
, ULONGEST end
, int flags
)
4342 struct target_ops
*t
;
4344 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4345 if (t
->to_call_history_range
!= NULL
)
4347 t
->to_call_history_range (t
, begin
, end
, flags
);
4355 debug_to_prepare_to_store (struct target_ops
*self
, struct regcache
*regcache
)
4357 debug_target
.to_prepare_to_store (&debug_target
, regcache
);
4359 fprintf_unfiltered (gdb_stdlog
, "target_prepare_to_store ()\n");
4364 const struct frame_unwind
*
4365 target_get_unwinder (void)
4367 struct target_ops
*t
;
4369 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4370 if (t
->to_get_unwinder
!= NULL
)
4371 return t
->to_get_unwinder
;
4378 const struct frame_unwind
*
4379 target_get_tailcall_unwinder (void)
4381 struct target_ops
*t
;
4383 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
4384 if (t
->to_get_tailcall_unwinder
!= NULL
)
4385 return t
->to_get_tailcall_unwinder
;
4393 forward_target_decr_pc_after_break (struct target_ops
*ops
,
4394 struct gdbarch
*gdbarch
)
4396 for (; ops
!= NULL
; ops
= ops
->beneath
)
4397 if (ops
->to_decr_pc_after_break
!= NULL
)
4398 return ops
->to_decr_pc_after_break (ops
, gdbarch
);
4400 return gdbarch_decr_pc_after_break (gdbarch
);
4406 target_decr_pc_after_break (struct gdbarch
*gdbarch
)
4408 return forward_target_decr_pc_after_break (current_target
.beneath
, gdbarch
);
4412 deprecated_debug_xfer_memory (CORE_ADDR memaddr
, bfd_byte
*myaddr
, int len
,
4413 int write
, struct mem_attrib
*attrib
,
4414 struct target_ops
*target
)
4418 retval
= debug_target
.deprecated_xfer_memory (memaddr
, myaddr
, len
, write
,
4421 fprintf_unfiltered (gdb_stdlog
,
4422 "target_xfer_memory (%s, xxx, %d, %s, xxx) = %d",
4423 paddress (target_gdbarch (), memaddr
), len
,
4424 write
? "write" : "read", retval
);
4430 fputs_unfiltered (", bytes =", gdb_stdlog
);
4431 for (i
= 0; i
< retval
; i
++)
4433 if ((((intptr_t) &(myaddr
[i
])) & 0xf) == 0)
4435 if (targetdebug
< 2 && i
> 0)
4437 fprintf_unfiltered (gdb_stdlog
, " ...");
4440 fprintf_unfiltered (gdb_stdlog
, "\n");
4443 fprintf_unfiltered (gdb_stdlog
, " %02x", myaddr
[i
] & 0xff);
4447 fputc_unfiltered ('\n', gdb_stdlog
);
4453 debug_to_files_info (struct target_ops
*target
)
4455 debug_target
.to_files_info (target
);
4457 fprintf_unfiltered (gdb_stdlog
, "target_files_info (xxx)\n");
4461 debug_to_insert_breakpoint (struct target_ops
*ops
, struct gdbarch
*gdbarch
,
4462 struct bp_target_info
*bp_tgt
)
4466 retval
= debug_target
.to_insert_breakpoint (&debug_target
, gdbarch
, bp_tgt
);
4468 fprintf_unfiltered (gdb_stdlog
,
4469 "target_insert_breakpoint (%s, xxx) = %ld\n",
4470 core_addr_to_string (bp_tgt
->placed_address
),
4471 (unsigned long) retval
);
4476 debug_to_remove_breakpoint (struct target_ops
*ops
, struct gdbarch
*gdbarch
,
4477 struct bp_target_info
*bp_tgt
)
4481 retval
= debug_target
.to_remove_breakpoint (&debug_target
, gdbarch
, bp_tgt
);
4483 fprintf_unfiltered (gdb_stdlog
,
4484 "target_remove_breakpoint (%s, xxx) = %ld\n",
4485 core_addr_to_string (bp_tgt
->placed_address
),
4486 (unsigned long) retval
);
4491 debug_to_can_use_hw_breakpoint (struct target_ops
*self
,
4492 int type
, int cnt
, int from_tty
)
4496 retval
= debug_target
.to_can_use_hw_breakpoint (&debug_target
,
4497 type
, cnt
, from_tty
);
4499 fprintf_unfiltered (gdb_stdlog
,
4500 "target_can_use_hw_breakpoint (%ld, %ld, %ld) = %ld\n",
4501 (unsigned long) type
,
4502 (unsigned long) cnt
,
4503 (unsigned long) from_tty
,
4504 (unsigned long) retval
);
4509 debug_to_region_ok_for_hw_watchpoint (struct target_ops
*self
,
4510 CORE_ADDR addr
, int len
)
4514 retval
= debug_target
.to_region_ok_for_hw_watchpoint (&debug_target
,
4517 fprintf_unfiltered (gdb_stdlog
,
4518 "target_region_ok_for_hw_watchpoint (%s, %ld) = %s\n",
4519 core_addr_to_string (addr
), (unsigned long) len
,
4520 core_addr_to_string (retval
));
4525 debug_to_can_accel_watchpoint_condition (struct target_ops
*self
,
4526 CORE_ADDR addr
, int len
, int rw
,
4527 struct expression
*cond
)
4531 retval
= debug_target
.to_can_accel_watchpoint_condition (&debug_target
,
4535 fprintf_unfiltered (gdb_stdlog
,
4536 "target_can_accel_watchpoint_condition "
4537 "(%s, %d, %d, %s) = %ld\n",
4538 core_addr_to_string (addr
), len
, rw
,
4539 host_address_to_string (cond
), (unsigned long) retval
);
4544 debug_to_stopped_by_watchpoint (struct target_ops
*ops
)
4548 retval
= debug_target
.to_stopped_by_watchpoint (&debug_target
);
4550 fprintf_unfiltered (gdb_stdlog
,
4551 "target_stopped_by_watchpoint () = %ld\n",
4552 (unsigned long) retval
);
4557 debug_to_stopped_data_address (struct target_ops
*target
, CORE_ADDR
*addr
)
4561 retval
= debug_target
.to_stopped_data_address (target
, addr
);
4563 fprintf_unfiltered (gdb_stdlog
,
4564 "target_stopped_data_address ([%s]) = %ld\n",
4565 core_addr_to_string (*addr
),
4566 (unsigned long)retval
);
4571 debug_to_watchpoint_addr_within_range (struct target_ops
*target
,
4573 CORE_ADDR start
, int length
)
4577 retval
= debug_target
.to_watchpoint_addr_within_range (target
, addr
,
4580 fprintf_filtered (gdb_stdlog
,
4581 "target_watchpoint_addr_within_range (%s, %s, %d) = %d\n",
4582 core_addr_to_string (addr
), core_addr_to_string (start
),
4588 debug_to_insert_hw_breakpoint (struct target_ops
*self
,
4589 struct gdbarch
*gdbarch
,
4590 struct bp_target_info
*bp_tgt
)
4594 retval
= debug_target
.to_insert_hw_breakpoint (&debug_target
,
4597 fprintf_unfiltered (gdb_stdlog
,
4598 "target_insert_hw_breakpoint (%s, xxx) = %ld\n",
4599 core_addr_to_string (bp_tgt
->placed_address
),
4600 (unsigned long) retval
);
4605 debug_to_remove_hw_breakpoint (struct target_ops
*self
,
4606 struct gdbarch
*gdbarch
,
4607 struct bp_target_info
*bp_tgt
)
4611 retval
= debug_target
.to_remove_hw_breakpoint (&debug_target
,
4614 fprintf_unfiltered (gdb_stdlog
,
4615 "target_remove_hw_breakpoint (%s, xxx) = %ld\n",
4616 core_addr_to_string (bp_tgt
->placed_address
),
4617 (unsigned long) retval
);
4622 debug_to_insert_watchpoint (struct target_ops
*self
,
4623 CORE_ADDR addr
, int len
, int type
,
4624 struct expression
*cond
)
4628 retval
= debug_target
.to_insert_watchpoint (&debug_target
,
4629 addr
, len
, type
, cond
);
4631 fprintf_unfiltered (gdb_stdlog
,
4632 "target_insert_watchpoint (%s, %d, %d, %s) = %ld\n",
4633 core_addr_to_string (addr
), len
, type
,
4634 host_address_to_string (cond
), (unsigned long) retval
);
4639 debug_to_remove_watchpoint (struct target_ops
*self
,
4640 CORE_ADDR addr
, int len
, int type
,
4641 struct expression
*cond
)
4645 retval
= debug_target
.to_remove_watchpoint (&debug_target
,
4646 addr
, len
, type
, cond
);
4648 fprintf_unfiltered (gdb_stdlog
,
4649 "target_remove_watchpoint (%s, %d, %d, %s) = %ld\n",
4650 core_addr_to_string (addr
), len
, type
,
4651 host_address_to_string (cond
), (unsigned long) retval
);
4656 debug_to_terminal_init (struct target_ops
*self
)
4658 debug_target
.to_terminal_init (&debug_target
);
4660 fprintf_unfiltered (gdb_stdlog
, "target_terminal_init ()\n");
4664 debug_to_terminal_inferior (struct target_ops
*self
)
4666 debug_target
.to_terminal_inferior (&debug_target
);
4668 fprintf_unfiltered (gdb_stdlog
, "target_terminal_inferior ()\n");
4672 debug_to_terminal_ours_for_output (struct target_ops
*self
)
4674 debug_target
.to_terminal_ours_for_output (&debug_target
);
4676 fprintf_unfiltered (gdb_stdlog
, "target_terminal_ours_for_output ()\n");
4680 debug_to_terminal_ours (struct target_ops
*self
)
4682 debug_target
.to_terminal_ours (&debug_target
);
4684 fprintf_unfiltered (gdb_stdlog
, "target_terminal_ours ()\n");
4688 debug_to_terminal_save_ours (struct target_ops
*self
)
4690 debug_target
.to_terminal_save_ours (&debug_target
);
4692 fprintf_unfiltered (gdb_stdlog
, "target_terminal_save_ours ()\n");
4696 debug_to_terminal_info (struct target_ops
*self
,
4697 const char *arg
, int from_tty
)
4699 debug_target
.to_terminal_info (&debug_target
, arg
, from_tty
);
4701 fprintf_unfiltered (gdb_stdlog
, "target_terminal_info (%s, %d)\n", arg
,
4706 debug_to_load (struct target_ops
*self
, char *args
, int from_tty
)
4708 debug_target
.to_load (&debug_target
, args
, from_tty
);
4710 fprintf_unfiltered (gdb_stdlog
, "target_load (%s, %d)\n", args
, from_tty
);
4714 debug_to_post_startup_inferior (struct target_ops
*self
, ptid_t ptid
)
4716 debug_target
.to_post_startup_inferior (&debug_target
, ptid
);
4718 fprintf_unfiltered (gdb_stdlog
, "target_post_startup_inferior (%d)\n",
4719 ptid_get_pid (ptid
));
4723 debug_to_insert_fork_catchpoint (struct target_ops
*self
, int pid
)
4727 retval
= debug_target
.to_insert_fork_catchpoint (&debug_target
, pid
);
4729 fprintf_unfiltered (gdb_stdlog
, "target_insert_fork_catchpoint (%d) = %d\n",
4736 debug_to_remove_fork_catchpoint (struct target_ops
*self
, int pid
)
4740 retval
= debug_target
.to_remove_fork_catchpoint (&debug_target
, pid
);
4742 fprintf_unfiltered (gdb_stdlog
, "target_remove_fork_catchpoint (%d) = %d\n",
4749 debug_to_insert_vfork_catchpoint (struct target_ops
*self
, int pid
)
4753 retval
= debug_target
.to_insert_vfork_catchpoint (&debug_target
, pid
);
4755 fprintf_unfiltered (gdb_stdlog
, "target_insert_vfork_catchpoint (%d) = %d\n",
4762 debug_to_remove_vfork_catchpoint (struct target_ops
*self
, int pid
)
4766 retval
= debug_target
.to_remove_vfork_catchpoint (&debug_target
, pid
);
4768 fprintf_unfiltered (gdb_stdlog
, "target_remove_vfork_catchpoint (%d) = %d\n",
4775 debug_to_insert_exec_catchpoint (struct target_ops
*self
, int pid
)
4779 retval
= debug_target
.to_insert_exec_catchpoint (&debug_target
, pid
);
4781 fprintf_unfiltered (gdb_stdlog
, "target_insert_exec_catchpoint (%d) = %d\n",
4788 debug_to_remove_exec_catchpoint (struct target_ops
*self
, int pid
)
4792 retval
= debug_target
.to_remove_exec_catchpoint (&debug_target
, pid
);
4794 fprintf_unfiltered (gdb_stdlog
, "target_remove_exec_catchpoint (%d) = %d\n",
4801 debug_to_has_exited (struct target_ops
*self
,
4802 int pid
, int wait_status
, int *exit_status
)
4806 has_exited
= debug_target
.to_has_exited (&debug_target
,
4807 pid
, wait_status
, exit_status
);
4809 fprintf_unfiltered (gdb_stdlog
, "target_has_exited (%d, %d, %d) = %d\n",
4810 pid
, wait_status
, *exit_status
, has_exited
);
4816 debug_to_can_run (struct target_ops
*self
)
4820 retval
= debug_target
.to_can_run (&debug_target
);
4822 fprintf_unfiltered (gdb_stdlog
, "target_can_run () = %d\n", retval
);
4827 static struct gdbarch
*
4828 debug_to_thread_architecture (struct target_ops
*ops
, ptid_t ptid
)
4830 struct gdbarch
*retval
;
4832 retval
= debug_target
.to_thread_architecture (ops
, ptid
);
4834 fprintf_unfiltered (gdb_stdlog
,
4835 "target_thread_architecture (%s) = %s [%s]\n",
4836 target_pid_to_str (ptid
),
4837 host_address_to_string (retval
),
4838 gdbarch_bfd_arch_info (retval
)->printable_name
);
4843 debug_to_stop (struct target_ops
*self
, ptid_t ptid
)
4845 debug_target
.to_stop (&debug_target
, ptid
);
4847 fprintf_unfiltered (gdb_stdlog
, "target_stop (%s)\n",
4848 target_pid_to_str (ptid
));
4852 debug_to_rcmd (struct target_ops
*self
, char *command
,
4853 struct ui_file
*outbuf
)
4855 debug_target
.to_rcmd (&debug_target
, command
, outbuf
);
4856 fprintf_unfiltered (gdb_stdlog
, "target_rcmd (%s, ...)\n", command
);
4860 debug_to_pid_to_exec_file (struct target_ops
*self
, int pid
)
4864 exec_file
= debug_target
.to_pid_to_exec_file (&debug_target
, pid
);
4866 fprintf_unfiltered (gdb_stdlog
, "target_pid_to_exec_file (%d) = %s\n",
4873 setup_target_debug (void)
4875 memcpy (&debug_target
, ¤t_target
, sizeof debug_target
);
4877 current_target
.to_open
= debug_to_open
;
4878 current_target
.to_post_attach
= debug_to_post_attach
;
4879 current_target
.to_prepare_to_store
= debug_to_prepare_to_store
;
4880 current_target
.deprecated_xfer_memory
= deprecated_debug_xfer_memory
;
4881 current_target
.to_files_info
= debug_to_files_info
;
4882 current_target
.to_insert_breakpoint
= debug_to_insert_breakpoint
;
4883 current_target
.to_remove_breakpoint
= debug_to_remove_breakpoint
;
4884 current_target
.to_can_use_hw_breakpoint
= debug_to_can_use_hw_breakpoint
;
4885 current_target
.to_insert_hw_breakpoint
= debug_to_insert_hw_breakpoint
;
4886 current_target
.to_remove_hw_breakpoint
= debug_to_remove_hw_breakpoint
;
4887 current_target
.to_insert_watchpoint
= debug_to_insert_watchpoint
;
4888 current_target
.to_remove_watchpoint
= debug_to_remove_watchpoint
;
4889 current_target
.to_stopped_by_watchpoint
= debug_to_stopped_by_watchpoint
;
4890 current_target
.to_stopped_data_address
= debug_to_stopped_data_address
;
4891 current_target
.to_watchpoint_addr_within_range
4892 = debug_to_watchpoint_addr_within_range
;
4893 current_target
.to_region_ok_for_hw_watchpoint
4894 = debug_to_region_ok_for_hw_watchpoint
;
4895 current_target
.to_can_accel_watchpoint_condition
4896 = debug_to_can_accel_watchpoint_condition
;
4897 current_target
.to_terminal_init
= debug_to_terminal_init
;
4898 current_target
.to_terminal_inferior
= debug_to_terminal_inferior
;
4899 current_target
.to_terminal_ours_for_output
4900 = debug_to_terminal_ours_for_output
;
4901 current_target
.to_terminal_ours
= debug_to_terminal_ours
;
4902 current_target
.to_terminal_save_ours
= debug_to_terminal_save_ours
;
4903 current_target
.to_terminal_info
= debug_to_terminal_info
;
4904 current_target
.to_load
= debug_to_load
;
4905 current_target
.to_post_startup_inferior
= debug_to_post_startup_inferior
;
4906 current_target
.to_insert_fork_catchpoint
= debug_to_insert_fork_catchpoint
;
4907 current_target
.to_remove_fork_catchpoint
= debug_to_remove_fork_catchpoint
;
4908 current_target
.to_insert_vfork_catchpoint
= debug_to_insert_vfork_catchpoint
;
4909 current_target
.to_remove_vfork_catchpoint
= debug_to_remove_vfork_catchpoint
;
4910 current_target
.to_insert_exec_catchpoint
= debug_to_insert_exec_catchpoint
;
4911 current_target
.to_remove_exec_catchpoint
= debug_to_remove_exec_catchpoint
;
4912 current_target
.to_has_exited
= debug_to_has_exited
;
4913 current_target
.to_can_run
= debug_to_can_run
;
4914 current_target
.to_stop
= debug_to_stop
;
4915 current_target
.to_rcmd
= debug_to_rcmd
;
4916 current_target
.to_pid_to_exec_file
= debug_to_pid_to_exec_file
;
4917 current_target
.to_thread_architecture
= debug_to_thread_architecture
;
4921 static char targ_desc
[] =
4922 "Names of targets and files being debugged.\nShows the entire \
4923 stack of targets currently in use (including the exec-file,\n\
4924 core-file, and process, if any), as well as the symbol file name.";
4927 default_rcmd (struct target_ops
*self
, char *command
, struct ui_file
*output
)
4929 error (_("\"monitor\" command not supported by this target."));
4933 do_monitor_command (char *cmd
,
4936 target_rcmd (cmd
, gdb_stdtarg
);
4939 /* Print the name of each layers of our target stack. */
4942 maintenance_print_target_stack (char *cmd
, int from_tty
)
4944 struct target_ops
*t
;
4946 printf_filtered (_("The current target stack is:\n"));
4948 for (t
= target_stack
; t
!= NULL
; t
= t
->beneath
)
4950 printf_filtered (" - %s (%s)\n", t
->to_shortname
, t
->to_longname
);
4954 /* Controls if async mode is permitted. */
4955 int target_async_permitted
= 0;
4957 /* The set command writes to this variable. If the inferior is
4958 executing, target_async_permitted is *not* updated. */
4959 static int target_async_permitted_1
= 0;
4962 set_target_async_command (char *args
, int from_tty
,
4963 struct cmd_list_element
*c
)
4965 if (have_live_inferiors ())
4967 target_async_permitted_1
= target_async_permitted
;
4968 error (_("Cannot change this setting while the inferior is running."));
4971 target_async_permitted
= target_async_permitted_1
;
4975 show_target_async_command (struct ui_file
*file
, int from_tty
,
4976 struct cmd_list_element
*c
,
4979 fprintf_filtered (file
,
4980 _("Controlling the inferior in "
4981 "asynchronous mode is %s.\n"), value
);
4984 /* Temporary copies of permission settings. */
4986 static int may_write_registers_1
= 1;
4987 static int may_write_memory_1
= 1;
4988 static int may_insert_breakpoints_1
= 1;
4989 static int may_insert_tracepoints_1
= 1;
4990 static int may_insert_fast_tracepoints_1
= 1;
4991 static int may_stop_1
= 1;
4993 /* Make the user-set values match the real values again. */
4996 update_target_permissions (void)
4998 may_write_registers_1
= may_write_registers
;
4999 may_write_memory_1
= may_write_memory
;
5000 may_insert_breakpoints_1
= may_insert_breakpoints
;
5001 may_insert_tracepoints_1
= may_insert_tracepoints
;
5002 may_insert_fast_tracepoints_1
= may_insert_fast_tracepoints
;
5003 may_stop_1
= may_stop
;
5006 /* The one function handles (most of) the permission flags in the same
5010 set_target_permissions (char *args
, int from_tty
,
5011 struct cmd_list_element
*c
)
5013 if (target_has_execution
)
5015 update_target_permissions ();
5016 error (_("Cannot change this setting while the inferior is running."));
5019 /* Make the real values match the user-changed values. */
5020 may_write_registers
= may_write_registers_1
;
5021 may_insert_breakpoints
= may_insert_breakpoints_1
;
5022 may_insert_tracepoints
= may_insert_tracepoints_1
;
5023 may_insert_fast_tracepoints
= may_insert_fast_tracepoints_1
;
5024 may_stop
= may_stop_1
;
5025 update_observer_mode ();
5028 /* Set memory write permission independently of observer mode. */
5031 set_write_memory_permission (char *args
, int from_tty
,
5032 struct cmd_list_element
*c
)
5034 /* Make the real values match the user-changed values. */
5035 may_write_memory
= may_write_memory_1
;
5036 update_observer_mode ();
5041 initialize_targets (void)
5043 init_dummy_target ();
5044 push_target (&dummy_target
);
5046 add_info ("target", target_info
, targ_desc
);
5047 add_info ("files", target_info
, targ_desc
);
5049 add_setshow_zuinteger_cmd ("target", class_maintenance
, &targetdebug
, _("\
5050 Set target debugging."), _("\
5051 Show target debugging."), _("\
5052 When non-zero, target debugging is enabled. Higher numbers are more\n\
5053 verbose. Changes do not take effect until the next \"run\" or \"target\"\n\
5057 &setdebuglist
, &showdebuglist
);
5059 add_setshow_boolean_cmd ("trust-readonly-sections", class_support
,
5060 &trust_readonly
, _("\
5061 Set mode for reading from readonly sections."), _("\
5062 Show mode for reading from readonly sections."), _("\
5063 When this mode is on, memory reads from readonly sections (such as .text)\n\
5064 will be read from the object file instead of from the target. This will\n\
5065 result in significant performance improvement for remote targets."),
5067 show_trust_readonly
,
5068 &setlist
, &showlist
);
5070 add_com ("monitor", class_obscure
, do_monitor_command
,
5071 _("Send a command to the remote monitor (remote targets only)."));
5073 add_cmd ("target-stack", class_maintenance
, maintenance_print_target_stack
,
5074 _("Print the name of each layer of the internal target stack."),
5075 &maintenanceprintlist
);
5077 add_setshow_boolean_cmd ("target-async", no_class
,
5078 &target_async_permitted_1
, _("\
5079 Set whether gdb controls the inferior in asynchronous mode."), _("\
5080 Show whether gdb controls the inferior in asynchronous mode."), _("\
5081 Tells gdb whether to control the inferior in asynchronous mode."),
5082 set_target_async_command
,
5083 show_target_async_command
,
5087 add_setshow_boolean_cmd ("may-write-registers", class_support
,
5088 &may_write_registers_1
, _("\
5089 Set permission to write into registers."), _("\
5090 Show permission to write into registers."), _("\
5091 When this permission is on, GDB may write into the target's registers.\n\
5092 Otherwise, any sort of write attempt will result in an error."),
5093 set_target_permissions
, NULL
,
5094 &setlist
, &showlist
);
5096 add_setshow_boolean_cmd ("may-write-memory", class_support
,
5097 &may_write_memory_1
, _("\
5098 Set permission to write into target memory."), _("\
5099 Show permission to write into target memory."), _("\
5100 When this permission is on, GDB may write into the target's memory.\n\
5101 Otherwise, any sort of write attempt will result in an error."),
5102 set_write_memory_permission
, NULL
,
5103 &setlist
, &showlist
);
5105 add_setshow_boolean_cmd ("may-insert-breakpoints", class_support
,
5106 &may_insert_breakpoints_1
, _("\
5107 Set permission to insert breakpoints in the target."), _("\
5108 Show permission to insert breakpoints in the target."), _("\
5109 When this permission is on, GDB may insert breakpoints in the program.\n\
5110 Otherwise, any sort of insertion attempt will result in an error."),
5111 set_target_permissions
, NULL
,
5112 &setlist
, &showlist
);
5114 add_setshow_boolean_cmd ("may-insert-tracepoints", class_support
,
5115 &may_insert_tracepoints_1
, _("\
5116 Set permission to insert tracepoints in the target."), _("\
5117 Show permission to insert tracepoints in the target."), _("\
5118 When this permission is on, GDB may insert tracepoints in the program.\n\
5119 Otherwise, any sort of insertion attempt will result in an error."),
5120 set_target_permissions
, NULL
,
5121 &setlist
, &showlist
);
5123 add_setshow_boolean_cmd ("may-insert-fast-tracepoints", class_support
,
5124 &may_insert_fast_tracepoints_1
, _("\
5125 Set permission to insert fast tracepoints in the target."), _("\
5126 Show permission to insert fast tracepoints in the target."), _("\
5127 When this permission is on, GDB may insert fast tracepoints.\n\
5128 Otherwise, any sort of insertion attempt will result in an error."),
5129 set_target_permissions
, NULL
,
5130 &setlist
, &showlist
);
5132 add_setshow_boolean_cmd ("may-interrupt", class_support
,
5134 Set permission to interrupt or signal the target."), _("\
5135 Show permission to interrupt or signal the target."), _("\
5136 When this permission is on, GDB may interrupt/stop the target's execution.\n\
5137 Otherwise, any attempt to interrupt or stop will be ignored."),
5138 set_target_permissions
, NULL
,
5139 &setlist
, &showlist
);