1 /* Select target systems and architectures at runtime for GDB.
3 Copyright (C) 1990-2016 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/>. */
24 #include "target-dcache.h"
36 #include "target-descriptions.h"
37 #include "gdbthread.h"
40 #include "inline-frame.h"
41 #include "tracepoint.h"
42 #include "gdb/fileio.h"
45 #include "target-debug.h"
47 #include "event-top.h"
49 static void target_info (char *, int);
51 static void generic_tls_error (void) ATTRIBUTE_NORETURN
;
53 static void default_terminal_info (struct target_ops
*, const char *, int);
55 static int default_watchpoint_addr_within_range (struct target_ops
*,
56 CORE_ADDR
, CORE_ADDR
, int);
58 static int default_region_ok_for_hw_watchpoint (struct target_ops
*,
61 static void default_rcmd (struct target_ops
*, const char *, struct ui_file
*);
63 static ptid_t
default_get_ada_task_ptid (struct target_ops
*self
,
66 static int default_follow_fork (struct target_ops
*self
, int follow_child
,
69 static void default_mourn_inferior (struct target_ops
*self
);
71 static int default_search_memory (struct target_ops
*ops
,
73 ULONGEST search_space_len
,
74 const gdb_byte
*pattern
,
76 CORE_ADDR
*found_addrp
);
78 static int default_verify_memory (struct target_ops
*self
,
80 CORE_ADDR memaddr
, ULONGEST size
);
82 static struct address_space
*default_thread_address_space
83 (struct target_ops
*self
, ptid_t ptid
);
85 static void tcomplain (void) ATTRIBUTE_NORETURN
;
87 static int return_zero (struct target_ops
*);
89 static int return_zero_has_execution (struct target_ops
*, ptid_t
);
91 static void target_command (char *, int);
93 static struct target_ops
*find_default_run_target (char *);
95 static struct gdbarch
*default_thread_architecture (struct target_ops
*ops
,
98 static int dummy_find_memory_regions (struct target_ops
*self
,
99 find_memory_region_ftype ignore1
,
102 static char *dummy_make_corefile_notes (struct target_ops
*self
,
103 bfd
*ignore1
, int *ignore2
);
105 static char *default_pid_to_str (struct target_ops
*ops
, ptid_t ptid
);
107 static enum exec_direction_kind default_execution_direction
108 (struct target_ops
*self
);
110 static struct target_ops debug_target
;
112 #include "target-delegates.c"
114 static void init_dummy_target (void);
116 static void update_current_target (void);
118 /* Vector of existing target structures. */
119 typedef struct target_ops
*target_ops_p
;
120 DEF_VEC_P (target_ops_p
);
121 static VEC (target_ops_p
) *target_structs
;
123 /* The initial current target, so that there is always a semi-valid
126 static struct target_ops dummy_target
;
128 /* Top of target stack. */
130 static struct target_ops
*target_stack
;
132 /* The target structure we are currently using to talk to a process
133 or file or whatever "inferior" we have. */
135 struct target_ops current_target
;
137 /* Command list for target. */
139 static struct cmd_list_element
*targetlist
= NULL
;
141 /* Nonzero if we should trust readonly sections from the
142 executable when reading memory. */
144 static int trust_readonly
= 0;
146 /* Nonzero if we should show true memory content including
147 memory breakpoint inserted by gdb. */
149 static int show_memory_breakpoints
= 0;
151 /* These globals control whether GDB attempts to perform these
152 operations; they are useful for targets that need to prevent
153 inadvertant disruption, such as in non-stop mode. */
155 int may_write_registers
= 1;
157 int may_write_memory
= 1;
159 int may_insert_breakpoints
= 1;
161 int may_insert_tracepoints
= 1;
163 int may_insert_fast_tracepoints
= 1;
167 /* Non-zero if we want to see trace of target level stuff. */
169 static unsigned int targetdebug
= 0;
172 set_targetdebug (char *args
, int from_tty
, struct cmd_list_element
*c
)
174 update_current_target ();
178 show_targetdebug (struct ui_file
*file
, int from_tty
,
179 struct cmd_list_element
*c
, const char *value
)
181 fprintf_filtered (file
, _("Target debugging is %s.\n"), value
);
184 static void setup_target_debug (void);
186 /* The user just typed 'target' without the name of a target. */
189 target_command (char *arg
, int from_tty
)
191 fputs_filtered ("Argument required (target name). Try `help target'\n",
195 /* Default target_has_* methods for process_stratum targets. */
198 default_child_has_all_memory (struct target_ops
*ops
)
200 /* If no inferior selected, then we can't read memory here. */
201 if (ptid_equal (inferior_ptid
, null_ptid
))
208 default_child_has_memory (struct target_ops
*ops
)
210 /* If no inferior selected, then we can't read memory here. */
211 if (ptid_equal (inferior_ptid
, null_ptid
))
218 default_child_has_stack (struct target_ops
*ops
)
220 /* If no inferior selected, there's no stack. */
221 if (ptid_equal (inferior_ptid
, null_ptid
))
228 default_child_has_registers (struct target_ops
*ops
)
230 /* Can't read registers from no inferior. */
231 if (ptid_equal (inferior_ptid
, null_ptid
))
238 default_child_has_execution (struct target_ops
*ops
, ptid_t the_ptid
)
240 /* If there's no thread selected, then we can't make it run through
242 if (ptid_equal (the_ptid
, null_ptid
))
250 target_has_all_memory_1 (void)
252 struct target_ops
*t
;
254 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
255 if (t
->to_has_all_memory (t
))
262 target_has_memory_1 (void)
264 struct target_ops
*t
;
266 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
267 if (t
->to_has_memory (t
))
274 target_has_stack_1 (void)
276 struct target_ops
*t
;
278 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
279 if (t
->to_has_stack (t
))
286 target_has_registers_1 (void)
288 struct target_ops
*t
;
290 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
291 if (t
->to_has_registers (t
))
298 target_has_execution_1 (ptid_t the_ptid
)
300 struct target_ops
*t
;
302 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
303 if (t
->to_has_execution (t
, the_ptid
))
310 target_has_execution_current (void)
312 return target_has_execution_1 (inferior_ptid
);
315 /* Complete initialization of T. This ensures that various fields in
316 T are set, if needed by the target implementation. */
319 complete_target_initialization (struct target_ops
*t
)
321 /* Provide default values for all "must have" methods. */
323 if (t
->to_has_all_memory
== NULL
)
324 t
->to_has_all_memory
= return_zero
;
326 if (t
->to_has_memory
== NULL
)
327 t
->to_has_memory
= return_zero
;
329 if (t
->to_has_stack
== NULL
)
330 t
->to_has_stack
= return_zero
;
332 if (t
->to_has_registers
== NULL
)
333 t
->to_has_registers
= return_zero
;
335 if (t
->to_has_execution
== NULL
)
336 t
->to_has_execution
= return_zero_has_execution
;
338 /* These methods can be called on an unpushed target and so require
339 a default implementation if the target might plausibly be the
340 default run target. */
341 gdb_assert (t
->to_can_run
== NULL
|| (t
->to_can_async_p
!= NULL
342 && t
->to_supports_non_stop
!= NULL
));
344 install_delegators (t
);
347 /* This is used to implement the various target commands. */
350 open_target (char *args
, int from_tty
, struct cmd_list_element
*command
)
352 struct target_ops
*ops
= (struct target_ops
*) get_cmd_context (command
);
355 fprintf_unfiltered (gdb_stdlog
, "-> %s->to_open (...)\n",
358 ops
->to_open (args
, from_tty
);
361 fprintf_unfiltered (gdb_stdlog
, "<- %s->to_open (%s, %d)\n",
362 ops
->to_shortname
, args
, from_tty
);
365 /* Add possible target architecture T to the list and add a new
366 command 'target T->to_shortname'. Set COMPLETER as the command's
367 completer if not NULL. */
370 add_target_with_completer (struct target_ops
*t
,
371 completer_ftype
*completer
)
373 struct cmd_list_element
*c
;
375 complete_target_initialization (t
);
377 VEC_safe_push (target_ops_p
, target_structs
, t
);
379 if (targetlist
== NULL
)
380 add_prefix_cmd ("target", class_run
, target_command
, _("\
381 Connect to a target machine or process.\n\
382 The first argument is the type or protocol of the target machine.\n\
383 Remaining arguments are interpreted by the target protocol. For more\n\
384 information on the arguments for a particular protocol, type\n\
385 `help target ' followed by the protocol name."),
386 &targetlist
, "target ", 0, &cmdlist
);
387 c
= add_cmd (t
->to_shortname
, no_class
, NULL
, t
->to_doc
, &targetlist
);
388 set_cmd_sfunc (c
, open_target
);
389 set_cmd_context (c
, t
);
390 if (completer
!= NULL
)
391 set_cmd_completer (c
, completer
);
394 /* Add a possible target architecture to the list. */
397 add_target (struct target_ops
*t
)
399 add_target_with_completer (t
, NULL
);
405 add_deprecated_target_alias (struct target_ops
*t
, char *alias
)
407 struct cmd_list_element
*c
;
410 /* If we use add_alias_cmd, here, we do not get the deprecated warning,
412 c
= add_cmd (alias
, no_class
, NULL
, t
->to_doc
, &targetlist
);
413 set_cmd_sfunc (c
, open_target
);
414 set_cmd_context (c
, t
);
415 alt
= xstrprintf ("target %s", t
->to_shortname
);
416 deprecate_cmd (c
, alt
);
424 current_target
.to_kill (¤t_target
);
428 target_load (const char *arg
, int from_tty
)
430 target_dcache_invalidate ();
431 (*current_target
.to_load
) (¤t_target
, arg
, from_tty
);
434 /* Possible terminal states. */
438 /* The inferior's terminal settings are in effect. */
439 terminal_is_inferior
= 0,
441 /* Some of our terminal settings are in effect, enough to get
443 terminal_is_ours_for_output
= 1,
445 /* Our terminal settings are in effect, for output and input. */
449 static enum terminal_state terminal_state
= terminal_is_ours
;
454 target_terminal_init (void)
456 (*current_target
.to_terminal_init
) (¤t_target
);
458 terminal_state
= terminal_is_ours
;
464 target_terminal_is_inferior (void)
466 return (terminal_state
== terminal_is_inferior
);
472 target_terminal_is_ours (void)
474 return (terminal_state
== terminal_is_ours
);
480 target_terminal_inferior (void)
482 struct ui
*ui
= current_ui
;
484 /* A background resume (``run&'') should leave GDB in control of the
486 if (ui
->prompt_state
!= PROMPT_BLOCKED
)
489 /* Always delete the current UI's input file handler, regardless of
490 terminal_state, because terminal_state is only valid for the main
492 delete_file_handler (ui
->input_fd
);
494 /* Since we always run the inferior in the main console (unless "set
495 inferior-tty" is in effect), when some UI other than the main one
496 calls target_terminal_inferior/target_terminal_inferior, then we
497 only register/unregister the UI's input from the event loop, but
498 leave the main UI's terminal settings as is. */
502 if (terminal_state
== terminal_is_inferior
)
505 /* If GDB is resuming the inferior in the foreground, install
506 inferior's terminal modes. */
507 (*current_target
.to_terminal_inferior
) (¤t_target
);
508 terminal_state
= terminal_is_inferior
;
510 /* If the user hit C-c before, pretend that it was hit right
512 if (check_quit_flag ())
513 target_pass_ctrlc ();
519 target_terminal_ours (void)
521 struct ui
*ui
= current_ui
;
523 /* Always add the current UI's input file handler, regardless of
524 terminal_state, because terminal_state is only valid for the main
526 add_file_handler (ui
->input_fd
, stdin_event_handler
, ui
);
528 /* See target_terminal_inferior. */
532 if (terminal_state
== terminal_is_ours
)
535 (*current_target
.to_terminal_ours
) (¤t_target
);
536 terminal_state
= terminal_is_ours
;
542 target_terminal_ours_for_output (void)
544 struct ui
*ui
= current_ui
;
546 /* See target_terminal_inferior. */
550 if (terminal_state
!= terminal_is_inferior
)
552 (*current_target
.to_terminal_ours_for_output
) (¤t_target
);
553 terminal_state
= terminal_is_ours_for_output
;
559 target_supports_terminal_ours (void)
561 struct target_ops
*t
;
563 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
565 if (t
->to_terminal_ours
!= delegate_terminal_ours
566 && t
->to_terminal_ours
!= tdefault_terminal_ours
)
573 /* Restore the terminal to its previous state (helper for
574 make_cleanup_restore_target_terminal). */
577 cleanup_restore_target_terminal (void *arg
)
579 enum terminal_state
*previous_state
= (enum terminal_state
*) arg
;
581 switch (*previous_state
)
583 case terminal_is_ours
:
584 target_terminal_ours ();
586 case terminal_is_ours_for_output
:
587 target_terminal_ours_for_output ();
589 case terminal_is_inferior
:
590 target_terminal_inferior ();
598 make_cleanup_restore_target_terminal (void)
600 enum terminal_state
*ts
= XNEW (enum terminal_state
);
602 *ts
= terminal_state
;
604 return make_cleanup_dtor (cleanup_restore_target_terminal
, ts
, xfree
);
610 error (_("You can't do that when your target is `%s'"),
611 current_target
.to_shortname
);
617 error (_("You can't do that without a process to debug."));
621 default_terminal_info (struct target_ops
*self
, const char *args
, int from_tty
)
623 printf_unfiltered (_("No saved terminal information.\n"));
626 /* A default implementation for the to_get_ada_task_ptid target method.
628 This function builds the PTID by using both LWP and TID as part of
629 the PTID lwp and tid elements. The pid used is the pid of the
633 default_get_ada_task_ptid (struct target_ops
*self
, long lwp
, long tid
)
635 return ptid_build (ptid_get_pid (inferior_ptid
), lwp
, tid
);
638 static enum exec_direction_kind
639 default_execution_direction (struct target_ops
*self
)
641 if (!target_can_execute_reverse
)
643 else if (!target_can_async_p ())
646 gdb_assert_not_reached ("\
647 to_execution_direction must be implemented for reverse async");
650 /* Go through the target stack from top to bottom, copying over zero
651 entries in current_target, then filling in still empty entries. In
652 effect, we are doing class inheritance through the pushed target
655 NOTE: cagney/2003-10-17: The problem with this inheritance, as it
656 is currently implemented, is that it discards any knowledge of
657 which target an inherited method originally belonged to.
658 Consequently, new new target methods should instead explicitly and
659 locally search the target stack for the target that can handle the
663 update_current_target (void)
665 struct target_ops
*t
;
667 /* First, reset current's contents. */
668 memset (¤t_target
, 0, sizeof (current_target
));
670 /* Install the delegators. */
671 install_delegators (¤t_target
);
673 current_target
.to_stratum
= target_stack
->to_stratum
;
675 #define INHERIT(FIELD, TARGET) \
676 if (!current_target.FIELD) \
677 current_target.FIELD = (TARGET)->FIELD
679 /* Do not add any new INHERITs here. Instead, use the delegation
680 mechanism provided by make-target-delegates. */
681 for (t
= target_stack
; t
; t
= t
->beneath
)
683 INHERIT (to_shortname
, t
);
684 INHERIT (to_longname
, t
);
685 INHERIT (to_attach_no_wait
, t
);
686 INHERIT (to_have_steppable_watchpoint
, t
);
687 INHERIT (to_have_continuable_watchpoint
, t
);
688 INHERIT (to_has_thread_control
, t
);
692 /* Finally, position the target-stack beneath the squashed
693 "current_target". That way code looking for a non-inherited
694 target method can quickly and simply find it. */
695 current_target
.beneath
= target_stack
;
698 setup_target_debug ();
701 /* Push a new target type into the stack of the existing target accessors,
702 possibly superseding some of the existing accessors.
704 Rather than allow an empty stack, we always have the dummy target at
705 the bottom stratum, so we can call the function vectors without
709 push_target (struct target_ops
*t
)
711 struct target_ops
**cur
;
713 /* Check magic number. If wrong, it probably means someone changed
714 the struct definition, but not all the places that initialize one. */
715 if (t
->to_magic
!= OPS_MAGIC
)
717 fprintf_unfiltered (gdb_stderr
,
718 "Magic number of %s target struct wrong\n",
720 internal_error (__FILE__
, __LINE__
,
721 _("failed internal consistency check"));
724 /* Find the proper stratum to install this target in. */
725 for (cur
= &target_stack
; (*cur
) != NULL
; cur
= &(*cur
)->beneath
)
727 if ((int) (t
->to_stratum
) >= (int) (*cur
)->to_stratum
)
731 /* If there's already targets at this stratum, remove them. */
732 /* FIXME: cagney/2003-10-15: I think this should be popping all
733 targets to CUR, and not just those at this stratum level. */
734 while ((*cur
) != NULL
&& t
->to_stratum
== (*cur
)->to_stratum
)
736 /* There's already something at this stratum level. Close it,
737 and un-hook it from the stack. */
738 struct target_ops
*tmp
= (*cur
);
740 (*cur
) = (*cur
)->beneath
;
745 /* We have removed all targets in our stratum, now add the new one. */
749 update_current_target ();
752 /* Remove a target_ops vector from the stack, wherever it may be.
753 Return how many times it was removed (0 or 1). */
756 unpush_target (struct target_ops
*t
)
758 struct target_ops
**cur
;
759 struct target_ops
*tmp
;
761 if (t
->to_stratum
== dummy_stratum
)
762 internal_error (__FILE__
, __LINE__
,
763 _("Attempt to unpush the dummy target"));
765 /* Look for the specified target. Note that we assume that a target
766 can only occur once in the target stack. */
768 for (cur
= &target_stack
; (*cur
) != NULL
; cur
= &(*cur
)->beneath
)
774 /* If we don't find target_ops, quit. Only open targets should be
779 /* Unchain the target. */
781 (*cur
) = (*cur
)->beneath
;
784 update_current_target ();
786 /* Finally close the target. Note we do this after unchaining, so
787 any target method calls from within the target_close
788 implementation don't end up in T anymore. */
794 /* Unpush TARGET and assert that it worked. */
797 unpush_target_and_assert (struct target_ops
*target
)
799 if (!unpush_target (target
))
801 fprintf_unfiltered (gdb_stderr
,
802 "pop_all_targets couldn't find target %s\n",
803 target
->to_shortname
);
804 internal_error (__FILE__
, __LINE__
,
805 _("failed internal consistency check"));
810 pop_all_targets_above (enum strata above_stratum
)
812 while ((int) (current_target
.to_stratum
) > (int) above_stratum
)
813 unpush_target_and_assert (target_stack
);
819 pop_all_targets_at_and_above (enum strata stratum
)
821 while ((int) (current_target
.to_stratum
) >= (int) stratum
)
822 unpush_target_and_assert (target_stack
);
826 pop_all_targets (void)
828 pop_all_targets_above (dummy_stratum
);
831 /* Return 1 if T is now pushed in the target stack. Return 0 otherwise. */
834 target_is_pushed (struct target_ops
*t
)
836 struct target_ops
*cur
;
838 /* Check magic number. If wrong, it probably means someone changed
839 the struct definition, but not all the places that initialize one. */
840 if (t
->to_magic
!= OPS_MAGIC
)
842 fprintf_unfiltered (gdb_stderr
,
843 "Magic number of %s target struct wrong\n",
845 internal_error (__FILE__
, __LINE__
,
846 _("failed internal consistency check"));
849 for (cur
= target_stack
; cur
!= NULL
; cur
= cur
->beneath
)
856 /* Default implementation of to_get_thread_local_address. */
859 generic_tls_error (void)
861 throw_error (TLS_GENERIC_ERROR
,
862 _("Cannot find thread-local variables on this target"));
865 /* Using the objfile specified in OBJFILE, find the address for the
866 current thread's thread-local storage with offset OFFSET. */
868 target_translate_tls_address (struct objfile
*objfile
, CORE_ADDR offset
)
870 volatile CORE_ADDR addr
= 0;
871 struct target_ops
*target
= ¤t_target
;
873 if (gdbarch_fetch_tls_load_module_address_p (target_gdbarch ()))
875 ptid_t ptid
= inferior_ptid
;
881 /* Fetch the load module address for this objfile. */
882 lm_addr
= gdbarch_fetch_tls_load_module_address (target_gdbarch (),
885 addr
= target
->to_get_thread_local_address (target
, ptid
,
888 /* If an error occurred, print TLS related messages here. Otherwise,
889 throw the error to some higher catcher. */
890 CATCH (ex
, RETURN_MASK_ALL
)
892 int objfile_is_library
= (objfile
->flags
& OBJF_SHARED
);
896 case TLS_NO_LIBRARY_SUPPORT_ERROR
:
897 error (_("Cannot find thread-local variables "
898 "in this thread library."));
900 case TLS_LOAD_MODULE_NOT_FOUND_ERROR
:
901 if (objfile_is_library
)
902 error (_("Cannot find shared library `%s' in dynamic"
903 " linker's load module list"), objfile_name (objfile
));
905 error (_("Cannot find executable file `%s' in dynamic"
906 " linker's load module list"), objfile_name (objfile
));
908 case TLS_NOT_ALLOCATED_YET_ERROR
:
909 if (objfile_is_library
)
910 error (_("The inferior has not yet allocated storage for"
911 " thread-local variables in\n"
912 "the shared library `%s'\n"
914 objfile_name (objfile
), target_pid_to_str (ptid
));
916 error (_("The inferior has not yet allocated storage for"
917 " thread-local variables in\n"
918 "the executable `%s'\n"
920 objfile_name (objfile
), target_pid_to_str (ptid
));
922 case TLS_GENERIC_ERROR
:
923 if (objfile_is_library
)
924 error (_("Cannot find thread-local storage for %s, "
925 "shared library %s:\n%s"),
926 target_pid_to_str (ptid
),
927 objfile_name (objfile
), ex
.message
);
929 error (_("Cannot find thread-local storage for %s, "
930 "executable file %s:\n%s"),
931 target_pid_to_str (ptid
),
932 objfile_name (objfile
), ex
.message
);
935 throw_exception (ex
);
941 /* It wouldn't be wrong here to try a gdbarch method, too; finding
942 TLS is an ABI-specific thing. But we don't do that yet. */
944 error (_("Cannot find thread-local variables on this target"));
950 target_xfer_status_to_string (enum target_xfer_status status
)
952 #define CASE(X) case X: return #X
955 CASE(TARGET_XFER_E_IO
);
956 CASE(TARGET_XFER_UNAVAILABLE
);
965 #define MIN(A, B) (((A) <= (B)) ? (A) : (B))
967 /* target_read_string -- read a null terminated string, up to LEN bytes,
968 from MEMADDR in target. Set *ERRNOP to the errno code, or 0 if successful.
969 Set *STRING to a pointer to malloc'd memory containing the data; the caller
970 is responsible for freeing it. Return the number of bytes successfully
974 target_read_string (CORE_ADDR memaddr
, char **string
, int len
, int *errnop
)
980 int buffer_allocated
;
982 unsigned int nbytes_read
= 0;
986 /* Small for testing. */
987 buffer_allocated
= 4;
988 buffer
= (char *) xmalloc (buffer_allocated
);
993 tlen
= MIN (len
, 4 - (memaddr
& 3));
994 offset
= memaddr
& 3;
996 errcode
= target_read_memory (memaddr
& ~3, buf
, sizeof buf
);
999 /* The transfer request might have crossed the boundary to an
1000 unallocated region of memory. Retry the transfer, requesting
1004 errcode
= target_read_memory (memaddr
, buf
, 1);
1009 if (bufptr
- buffer
+ tlen
> buffer_allocated
)
1013 bytes
= bufptr
- buffer
;
1014 buffer_allocated
*= 2;
1015 buffer
= (char *) xrealloc (buffer
, buffer_allocated
);
1016 bufptr
= buffer
+ bytes
;
1019 for (i
= 0; i
< tlen
; i
++)
1021 *bufptr
++ = buf
[i
+ offset
];
1022 if (buf
[i
+ offset
] == '\000')
1024 nbytes_read
+= i
+ 1;
1031 nbytes_read
+= tlen
;
1040 struct target_section_table
*
1041 target_get_section_table (struct target_ops
*target
)
1043 return (*target
->to_get_section_table
) (target
);
1046 /* Find a section containing ADDR. */
1048 struct target_section
*
1049 target_section_by_addr (struct target_ops
*target
, CORE_ADDR addr
)
1051 struct target_section_table
*table
= target_get_section_table (target
);
1052 struct target_section
*secp
;
1057 for (secp
= table
->sections
; secp
< table
->sections_end
; secp
++)
1059 if (addr
>= secp
->addr
&& addr
< secp
->endaddr
)
1066 /* Helper for the memory xfer routines. Checks the attributes of the
1067 memory region of MEMADDR against the read or write being attempted.
1068 If the access is permitted returns true, otherwise returns false.
1069 REGION_P is an optional output parameter. If not-NULL, it is
1070 filled with a pointer to the memory region of MEMADDR. REG_LEN
1071 returns LEN trimmed to the end of the region. This is how much the
1072 caller can continue requesting, if the access is permitted. A
1073 single xfer request must not straddle memory region boundaries. */
1076 memory_xfer_check_region (gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1077 ULONGEST memaddr
, ULONGEST len
, ULONGEST
*reg_len
,
1078 struct mem_region
**region_p
)
1080 struct mem_region
*region
;
1082 region
= lookup_mem_region (memaddr
);
1084 if (region_p
!= NULL
)
1087 switch (region
->attrib
.mode
)
1090 if (writebuf
!= NULL
)
1095 if (readbuf
!= NULL
)
1100 /* We only support writing to flash during "load" for now. */
1101 if (writebuf
!= NULL
)
1102 error (_("Writing to flash memory forbidden in this context"));
1109 /* region->hi == 0 means there's no upper bound. */
1110 if (memaddr
+ len
< region
->hi
|| region
->hi
== 0)
1113 *reg_len
= region
->hi
- memaddr
;
1118 /* Read memory from more than one valid target. A core file, for
1119 instance, could have some of memory but delegate other bits to
1120 the target below it. So, we must manually try all targets. */
1122 enum target_xfer_status
1123 raw_memory_xfer_partial (struct target_ops
*ops
, gdb_byte
*readbuf
,
1124 const gdb_byte
*writebuf
, ULONGEST memaddr
, LONGEST len
,
1125 ULONGEST
*xfered_len
)
1127 enum target_xfer_status res
;
1131 res
= ops
->to_xfer_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1132 readbuf
, writebuf
, memaddr
, len
,
1134 if (res
== TARGET_XFER_OK
)
1137 /* Stop if the target reports that the memory is not available. */
1138 if (res
== TARGET_XFER_UNAVAILABLE
)
1141 /* We want to continue past core files to executables, but not
1142 past a running target's memory. */
1143 if (ops
->to_has_all_memory (ops
))
1148 while (ops
!= NULL
);
1150 /* The cache works at the raw memory level. Make sure the cache
1151 gets updated with raw contents no matter what kind of memory
1152 object was originally being written. Note we do write-through
1153 first, so that if it fails, we don't write to the cache contents
1154 that never made it to the target. */
1155 if (writebuf
!= NULL
1156 && !ptid_equal (inferior_ptid
, null_ptid
)
1157 && target_dcache_init_p ()
1158 && (stack_cache_enabled_p () || code_cache_enabled_p ()))
1160 DCACHE
*dcache
= target_dcache_get ();
1162 /* Note that writing to an area of memory which wasn't present
1163 in the cache doesn't cause it to be loaded in. */
1164 dcache_update (dcache
, res
, memaddr
, writebuf
, *xfered_len
);
1170 /* Perform a partial memory transfer.
1171 For docs see target.h, to_xfer_partial. */
1173 static enum target_xfer_status
1174 memory_xfer_partial_1 (struct target_ops
*ops
, enum target_object object
,
1175 gdb_byte
*readbuf
, const gdb_byte
*writebuf
, ULONGEST memaddr
,
1176 ULONGEST len
, ULONGEST
*xfered_len
)
1178 enum target_xfer_status res
;
1180 struct mem_region
*region
;
1181 struct inferior
*inf
;
1183 /* For accesses to unmapped overlay sections, read directly from
1184 files. Must do this first, as MEMADDR may need adjustment. */
1185 if (readbuf
!= NULL
&& overlay_debugging
)
1187 struct obj_section
*section
= find_pc_overlay (memaddr
);
1189 if (pc_in_unmapped_range (memaddr
, section
))
1191 struct target_section_table
*table
1192 = target_get_section_table (ops
);
1193 const char *section_name
= section
->the_bfd_section
->name
;
1195 memaddr
= overlay_mapped_address (memaddr
, section
);
1196 return section_table_xfer_memory_partial (readbuf
, writebuf
,
1197 memaddr
, len
, xfered_len
,
1199 table
->sections_end
,
1204 /* Try the executable files, if "trust-readonly-sections" is set. */
1205 if (readbuf
!= NULL
&& trust_readonly
)
1207 struct target_section
*secp
;
1208 struct target_section_table
*table
;
1210 secp
= target_section_by_addr (ops
, memaddr
);
1212 && (bfd_get_section_flags (secp
->the_bfd_section
->owner
,
1213 secp
->the_bfd_section
)
1216 table
= target_get_section_table (ops
);
1217 return section_table_xfer_memory_partial (readbuf
, writebuf
,
1218 memaddr
, len
, xfered_len
,
1220 table
->sections_end
,
1225 /* Try GDB's internal data cache. */
1227 if (!memory_xfer_check_region (readbuf
, writebuf
, memaddr
, len
, ®_len
,
1229 return TARGET_XFER_E_IO
;
1231 if (!ptid_equal (inferior_ptid
, null_ptid
))
1232 inf
= find_inferior_ptid (inferior_ptid
);
1238 /* The dcache reads whole cache lines; that doesn't play well
1239 with reading from a trace buffer, because reading outside of
1240 the collected memory range fails. */
1241 && get_traceframe_number () == -1
1242 && (region
->attrib
.cache
1243 || (stack_cache_enabled_p () && object
== TARGET_OBJECT_STACK_MEMORY
)
1244 || (code_cache_enabled_p () && object
== TARGET_OBJECT_CODE_MEMORY
)))
1246 DCACHE
*dcache
= target_dcache_get_or_init ();
1248 return dcache_read_memory_partial (ops
, dcache
, memaddr
, readbuf
,
1249 reg_len
, xfered_len
);
1252 /* If none of those methods found the memory we wanted, fall back
1253 to a target partial transfer. Normally a single call to
1254 to_xfer_partial is enough; if it doesn't recognize an object
1255 it will call the to_xfer_partial of the next target down.
1256 But for memory this won't do. Memory is the only target
1257 object which can be read from more than one valid target.
1258 A core file, for instance, could have some of memory but
1259 delegate other bits to the target below it. So, we must
1260 manually try all targets. */
1262 res
= raw_memory_xfer_partial (ops
, readbuf
, writebuf
, memaddr
, reg_len
,
1265 /* If we still haven't got anything, return the last error. We
1270 /* Perform a partial memory transfer. For docs see target.h,
1273 static enum target_xfer_status
1274 memory_xfer_partial (struct target_ops
*ops
, enum target_object object
,
1275 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1276 ULONGEST memaddr
, ULONGEST len
, ULONGEST
*xfered_len
)
1278 enum target_xfer_status res
;
1280 /* Zero length requests are ok and require no work. */
1282 return TARGET_XFER_EOF
;
1284 /* Fill in READBUF with breakpoint shadows, or WRITEBUF with
1285 breakpoint insns, thus hiding out from higher layers whether
1286 there are software breakpoints inserted in the code stream. */
1287 if (readbuf
!= NULL
)
1289 res
= memory_xfer_partial_1 (ops
, object
, readbuf
, NULL
, memaddr
, len
,
1292 if (res
== TARGET_XFER_OK
&& !show_memory_breakpoints
)
1293 breakpoint_xfer_memory (readbuf
, NULL
, NULL
, memaddr
, *xfered_len
);
1298 struct cleanup
*old_chain
;
1300 /* A large write request is likely to be partially satisfied
1301 by memory_xfer_partial_1. We will continually malloc
1302 and free a copy of the entire write request for breakpoint
1303 shadow handling even though we only end up writing a small
1304 subset of it. Cap writes to a limit specified by the target
1305 to mitigate this. */
1306 len
= min (ops
->to_get_memory_xfer_limit (ops
), len
);
1308 buf
= (gdb_byte
*) xmalloc (len
);
1309 old_chain
= make_cleanup (xfree
, buf
);
1310 memcpy (buf
, writebuf
, len
);
1312 breakpoint_xfer_memory (NULL
, buf
, writebuf
, memaddr
, len
);
1313 res
= memory_xfer_partial_1 (ops
, object
, NULL
, buf
, memaddr
, len
,
1316 do_cleanups (old_chain
);
1323 restore_show_memory_breakpoints (void *arg
)
1325 show_memory_breakpoints
= (uintptr_t) arg
;
1329 make_show_memory_breakpoints_cleanup (int show
)
1331 int current
= show_memory_breakpoints
;
1333 show_memory_breakpoints
= show
;
1334 return make_cleanup (restore_show_memory_breakpoints
,
1335 (void *) (uintptr_t) current
);
1338 /* For docs see target.h, to_xfer_partial. */
1340 enum target_xfer_status
1341 target_xfer_partial (struct target_ops
*ops
,
1342 enum target_object object
, const char *annex
,
1343 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1344 ULONGEST offset
, ULONGEST len
,
1345 ULONGEST
*xfered_len
)
1347 enum target_xfer_status retval
;
1349 gdb_assert (ops
->to_xfer_partial
!= NULL
);
1351 /* Transfer is done when LEN is zero. */
1353 return TARGET_XFER_EOF
;
1355 if (writebuf
&& !may_write_memory
)
1356 error (_("Writing to memory is not allowed (addr %s, len %s)"),
1357 core_addr_to_string_nz (offset
), plongest (len
));
1361 /* If this is a memory transfer, let the memory-specific code
1362 have a look at it instead. Memory transfers are more
1364 if (object
== TARGET_OBJECT_MEMORY
|| object
== TARGET_OBJECT_STACK_MEMORY
1365 || object
== TARGET_OBJECT_CODE_MEMORY
)
1366 retval
= memory_xfer_partial (ops
, object
, readbuf
,
1367 writebuf
, offset
, len
, xfered_len
);
1368 else if (object
== TARGET_OBJECT_RAW_MEMORY
)
1370 /* Skip/avoid accessing the target if the memory region
1371 attributes block the access. Check this here instead of in
1372 raw_memory_xfer_partial as otherwise we'd end up checking
1373 this twice in the case of the memory_xfer_partial path is
1374 taken; once before checking the dcache, and another in the
1375 tail call to raw_memory_xfer_partial. */
1376 if (!memory_xfer_check_region (readbuf
, writebuf
, offset
, len
, &len
,
1378 return TARGET_XFER_E_IO
;
1380 /* Request the normal memory object from other layers. */
1381 retval
= raw_memory_xfer_partial (ops
, readbuf
, writebuf
, offset
, len
,
1385 retval
= ops
->to_xfer_partial (ops
, object
, annex
, readbuf
,
1386 writebuf
, offset
, len
, xfered_len
);
1390 const unsigned char *myaddr
= NULL
;
1392 fprintf_unfiltered (gdb_stdlog
,
1393 "%s:target_xfer_partial "
1394 "(%d, %s, %s, %s, %s, %s) = %d, %s",
1397 (annex
? annex
: "(null)"),
1398 host_address_to_string (readbuf
),
1399 host_address_to_string (writebuf
),
1400 core_addr_to_string_nz (offset
),
1401 pulongest (len
), retval
,
1402 pulongest (*xfered_len
));
1408 if (retval
== TARGET_XFER_OK
&& myaddr
!= NULL
)
1412 fputs_unfiltered (", bytes =", gdb_stdlog
);
1413 for (i
= 0; i
< *xfered_len
; i
++)
1415 if ((((intptr_t) &(myaddr
[i
])) & 0xf) == 0)
1417 if (targetdebug
< 2 && i
> 0)
1419 fprintf_unfiltered (gdb_stdlog
, " ...");
1422 fprintf_unfiltered (gdb_stdlog
, "\n");
1425 fprintf_unfiltered (gdb_stdlog
, " %02x", myaddr
[i
] & 0xff);
1429 fputc_unfiltered ('\n', gdb_stdlog
);
1432 /* Check implementations of to_xfer_partial update *XFERED_LEN
1433 properly. Do assertion after printing debug messages, so that we
1434 can find more clues on assertion failure from debugging messages. */
1435 if (retval
== TARGET_XFER_OK
|| retval
== TARGET_XFER_UNAVAILABLE
)
1436 gdb_assert (*xfered_len
> 0);
1441 /* Read LEN bytes of target memory at address MEMADDR, placing the
1442 results in GDB's memory at MYADDR. Returns either 0 for success or
1443 -1 if any error occurs.
1445 If an error occurs, no guarantee is made about the contents of the data at
1446 MYADDR. In particular, the caller should not depend upon partial reads
1447 filling the buffer with good data. There is no way for the caller to know
1448 how much good data might have been transfered anyway. Callers that can
1449 deal with partial reads should call target_read (which will retry until
1450 it makes no progress, and then return how much was transferred). */
1453 target_read_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1455 /* Dispatch to the topmost target, not the flattened current_target.
1456 Memory accesses check target->to_has_(all_)memory, and the
1457 flattened target doesn't inherit those. */
1458 if (target_read (current_target
.beneath
, TARGET_OBJECT_MEMORY
, NULL
,
1459 myaddr
, memaddr
, len
) == len
)
1465 /* See target/target.h. */
1468 target_read_uint32 (CORE_ADDR memaddr
, uint32_t *result
)
1473 r
= target_read_memory (memaddr
, buf
, sizeof buf
);
1476 *result
= extract_unsigned_integer (buf
, sizeof buf
,
1477 gdbarch_byte_order (target_gdbarch ()));
1481 /* Like target_read_memory, but specify explicitly that this is a read
1482 from the target's raw memory. That is, this read bypasses the
1483 dcache, breakpoint shadowing, etc. */
1486 target_read_raw_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1488 /* See comment in target_read_memory about why the request starts at
1489 current_target.beneath. */
1490 if (target_read (current_target
.beneath
, TARGET_OBJECT_RAW_MEMORY
, NULL
,
1491 myaddr
, memaddr
, len
) == len
)
1497 /* Like target_read_memory, but specify explicitly that this is a read from
1498 the target's stack. This may trigger different cache behavior. */
1501 target_read_stack (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1503 /* See comment in target_read_memory about why the request starts at
1504 current_target.beneath. */
1505 if (target_read (current_target
.beneath
, TARGET_OBJECT_STACK_MEMORY
, NULL
,
1506 myaddr
, memaddr
, len
) == len
)
1512 /* Like target_read_memory, but specify explicitly that this is a read from
1513 the target's code. This may trigger different cache behavior. */
1516 target_read_code (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1518 /* See comment in target_read_memory about why the request starts at
1519 current_target.beneath. */
1520 if (target_read (current_target
.beneath
, TARGET_OBJECT_CODE_MEMORY
, NULL
,
1521 myaddr
, memaddr
, len
) == len
)
1527 /* Write LEN bytes from MYADDR to target memory at address MEMADDR.
1528 Returns either 0 for success or -1 if any error occurs. If an
1529 error occurs, no guarantee is made about how much data got written.
1530 Callers that can deal with partial writes should call
1534 target_write_memory (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ssize_t len
)
1536 /* See comment in target_read_memory about why the request starts at
1537 current_target.beneath. */
1538 if (target_write (current_target
.beneath
, TARGET_OBJECT_MEMORY
, NULL
,
1539 myaddr
, memaddr
, len
) == len
)
1545 /* Write LEN bytes from MYADDR to target raw memory at address
1546 MEMADDR. Returns either 0 for success or -1 if any error occurs.
1547 If an error occurs, no guarantee is made about how much data got
1548 written. Callers that can deal with partial writes should call
1552 target_write_raw_memory (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ssize_t len
)
1554 /* See comment in target_read_memory about why the request starts at
1555 current_target.beneath. */
1556 if (target_write (current_target
.beneath
, TARGET_OBJECT_RAW_MEMORY
, NULL
,
1557 myaddr
, memaddr
, len
) == len
)
1563 /* Fetch the target's memory map. */
1566 target_memory_map (void)
1568 VEC(mem_region_s
) *result
;
1569 struct mem_region
*last_one
, *this_one
;
1571 result
= current_target
.to_memory_map (¤t_target
);
1575 qsort (VEC_address (mem_region_s
, result
),
1576 VEC_length (mem_region_s
, result
),
1577 sizeof (struct mem_region
), mem_region_cmp
);
1579 /* Check that regions do not overlap. Simultaneously assign
1580 a numbering for the "mem" commands to use to refer to
1583 for (ix
= 0; VEC_iterate (mem_region_s
, result
, ix
, this_one
); ix
++)
1585 this_one
->number
= ix
;
1587 if (last_one
&& last_one
->hi
> this_one
->lo
)
1589 warning (_("Overlapping regions in memory map: ignoring"));
1590 VEC_free (mem_region_s
, result
);
1593 last_one
= this_one
;
1600 target_flash_erase (ULONGEST address
, LONGEST length
)
1602 current_target
.to_flash_erase (¤t_target
, address
, length
);
1606 target_flash_done (void)
1608 current_target
.to_flash_done (¤t_target
);
1612 show_trust_readonly (struct ui_file
*file
, int from_tty
,
1613 struct cmd_list_element
*c
, const char *value
)
1615 fprintf_filtered (file
,
1616 _("Mode for reading from readonly sections is %s.\n"),
1620 /* Target vector read/write partial wrapper functions. */
1622 static enum target_xfer_status
1623 target_read_partial (struct target_ops
*ops
,
1624 enum target_object object
,
1625 const char *annex
, gdb_byte
*buf
,
1626 ULONGEST offset
, ULONGEST len
,
1627 ULONGEST
*xfered_len
)
1629 return target_xfer_partial (ops
, object
, annex
, buf
, NULL
, offset
, len
,
1633 static enum target_xfer_status
1634 target_write_partial (struct target_ops
*ops
,
1635 enum target_object object
,
1636 const char *annex
, const gdb_byte
*buf
,
1637 ULONGEST offset
, LONGEST len
, ULONGEST
*xfered_len
)
1639 return target_xfer_partial (ops
, object
, annex
, NULL
, buf
, offset
, len
,
1643 /* Wrappers to perform the full transfer. */
1645 /* For docs on target_read see target.h. */
1648 target_read (struct target_ops
*ops
,
1649 enum target_object object
,
1650 const char *annex
, gdb_byte
*buf
,
1651 ULONGEST offset
, LONGEST len
)
1653 LONGEST xfered_total
= 0;
1656 /* If we are reading from a memory object, find the length of an addressable
1657 unit for that architecture. */
1658 if (object
== TARGET_OBJECT_MEMORY
1659 || object
== TARGET_OBJECT_STACK_MEMORY
1660 || object
== TARGET_OBJECT_CODE_MEMORY
1661 || object
== TARGET_OBJECT_RAW_MEMORY
)
1662 unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
1664 while (xfered_total
< len
)
1666 ULONGEST xfered_partial
;
1667 enum target_xfer_status status
;
1669 status
= target_read_partial (ops
, object
, annex
,
1670 buf
+ xfered_total
* unit_size
,
1671 offset
+ xfered_total
, len
- xfered_total
,
1674 /* Call an observer, notifying them of the xfer progress? */
1675 if (status
== TARGET_XFER_EOF
)
1676 return xfered_total
;
1677 else if (status
== TARGET_XFER_OK
)
1679 xfered_total
+= xfered_partial
;
1683 return TARGET_XFER_E_IO
;
1689 /* Assuming that the entire [begin, end) range of memory cannot be
1690 read, try to read whatever subrange is possible to read.
1692 The function returns, in RESULT, either zero or one memory block.
1693 If there's a readable subrange at the beginning, it is completely
1694 read and returned. Any further readable subrange will not be read.
1695 Otherwise, if there's a readable subrange at the end, it will be
1696 completely read and returned. Any readable subranges before it
1697 (obviously, not starting at the beginning), will be ignored. In
1698 other cases -- either no readable subrange, or readable subrange(s)
1699 that is neither at the beginning, or end, nothing is returned.
1701 The purpose of this function is to handle a read across a boundary
1702 of accessible memory in a case when memory map is not available.
1703 The above restrictions are fine for this case, but will give
1704 incorrect results if the memory is 'patchy'. However, supporting
1705 'patchy' memory would require trying to read every single byte,
1706 and it seems unacceptable solution. Explicit memory map is
1707 recommended for this case -- and target_read_memory_robust will
1708 take care of reading multiple ranges then. */
1711 read_whatever_is_readable (struct target_ops
*ops
,
1712 const ULONGEST begin
, const ULONGEST end
,
1714 VEC(memory_read_result_s
) **result
)
1716 gdb_byte
*buf
= (gdb_byte
*) xmalloc (end
- begin
);
1717 ULONGEST current_begin
= begin
;
1718 ULONGEST current_end
= end
;
1720 memory_read_result_s r
;
1721 ULONGEST xfered_len
;
1723 /* If we previously failed to read 1 byte, nothing can be done here. */
1724 if (end
- begin
<= 1)
1730 /* Check that either first or the last byte is readable, and give up
1731 if not. This heuristic is meant to permit reading accessible memory
1732 at the boundary of accessible region. */
1733 if (target_read_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1734 buf
, begin
, 1, &xfered_len
) == TARGET_XFER_OK
)
1739 else if (target_read_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1740 buf
+ (end
- begin
) - 1, end
- 1, 1,
1741 &xfered_len
) == TARGET_XFER_OK
)
1752 /* Loop invariant is that the [current_begin, current_end) was previously
1753 found to be not readable as a whole.
1755 Note loop condition -- if the range has 1 byte, we can't divide the range
1756 so there's no point trying further. */
1757 while (current_end
- current_begin
> 1)
1759 ULONGEST first_half_begin
, first_half_end
;
1760 ULONGEST second_half_begin
, second_half_end
;
1762 ULONGEST middle
= current_begin
+ (current_end
- current_begin
) / 2;
1766 first_half_begin
= current_begin
;
1767 first_half_end
= middle
;
1768 second_half_begin
= middle
;
1769 second_half_end
= current_end
;
1773 first_half_begin
= middle
;
1774 first_half_end
= current_end
;
1775 second_half_begin
= current_begin
;
1776 second_half_end
= middle
;
1779 xfer
= target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1780 buf
+ (first_half_begin
- begin
) * unit_size
,
1782 first_half_end
- first_half_begin
);
1784 if (xfer
== first_half_end
- first_half_begin
)
1786 /* This half reads up fine. So, the error must be in the
1788 current_begin
= second_half_begin
;
1789 current_end
= second_half_end
;
1793 /* This half is not readable. Because we've tried one byte, we
1794 know some part of this half if actually readable. Go to the next
1795 iteration to divide again and try to read.
1797 We don't handle the other half, because this function only tries
1798 to read a single readable subrange. */
1799 current_begin
= first_half_begin
;
1800 current_end
= first_half_end
;
1806 /* The [begin, current_begin) range has been read. */
1808 r
.end
= current_begin
;
1813 /* The [current_end, end) range has been read. */
1814 LONGEST region_len
= end
- current_end
;
1816 r
.data
= (gdb_byte
*) xmalloc (region_len
* unit_size
);
1817 memcpy (r
.data
, buf
+ (current_end
- begin
) * unit_size
,
1818 region_len
* unit_size
);
1819 r
.begin
= current_end
;
1823 VEC_safe_push(memory_read_result_s
, (*result
), &r
);
1827 free_memory_read_result_vector (void *x
)
1829 VEC(memory_read_result_s
) **v
= (VEC(memory_read_result_s
) **) x
;
1830 memory_read_result_s
*current
;
1833 for (ix
= 0; VEC_iterate (memory_read_result_s
, *v
, ix
, current
); ++ix
)
1835 xfree (current
->data
);
1837 VEC_free (memory_read_result_s
, *v
);
1840 VEC(memory_read_result_s
) *
1841 read_memory_robust (struct target_ops
*ops
,
1842 const ULONGEST offset
, const LONGEST len
)
1844 VEC(memory_read_result_s
) *result
= 0;
1845 int unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
1846 struct cleanup
*cleanup
= make_cleanup (free_memory_read_result_vector
,
1849 LONGEST xfered_total
= 0;
1850 while (xfered_total
< len
)
1852 struct mem_region
*region
= lookup_mem_region (offset
+ xfered_total
);
1855 /* If there is no explicit region, a fake one should be created. */
1856 gdb_assert (region
);
1858 if (region
->hi
== 0)
1859 region_len
= len
- xfered_total
;
1861 region_len
= region
->hi
- offset
;
1863 if (region
->attrib
.mode
== MEM_NONE
|| region
->attrib
.mode
== MEM_WO
)
1865 /* Cannot read this region. Note that we can end up here only
1866 if the region is explicitly marked inaccessible, or
1867 'inaccessible-by-default' is in effect. */
1868 xfered_total
+= region_len
;
1872 LONGEST to_read
= min (len
- xfered_total
, region_len
);
1873 gdb_byte
*buffer
= (gdb_byte
*) xmalloc (to_read
* unit_size
);
1874 struct cleanup
*inner_cleanup
= make_cleanup (xfree
, buffer
);
1876 LONGEST xfered_partial
=
1877 target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1878 (gdb_byte
*) buffer
,
1879 offset
+ xfered_total
, to_read
);
1880 /* Call an observer, notifying them of the xfer progress? */
1881 if (xfered_partial
<= 0)
1883 /* Got an error reading full chunk. See if maybe we can read
1885 do_cleanups (inner_cleanup
);
1886 read_whatever_is_readable (ops
, offset
+ xfered_total
,
1887 offset
+ xfered_total
+ to_read
,
1888 unit_size
, &result
);
1889 xfered_total
+= to_read
;
1893 struct memory_read_result r
;
1895 discard_cleanups (inner_cleanup
);
1897 r
.begin
= offset
+ xfered_total
;
1898 r
.end
= r
.begin
+ xfered_partial
;
1899 VEC_safe_push (memory_read_result_s
, result
, &r
);
1900 xfered_total
+= xfered_partial
;
1906 discard_cleanups (cleanup
);
1911 /* An alternative to target_write with progress callbacks. */
1914 target_write_with_progress (struct target_ops
*ops
,
1915 enum target_object object
,
1916 const char *annex
, const gdb_byte
*buf
,
1917 ULONGEST offset
, LONGEST len
,
1918 void (*progress
) (ULONGEST
, void *), void *baton
)
1920 LONGEST xfered_total
= 0;
1923 /* If we are writing to a memory object, find the length of an addressable
1924 unit for that architecture. */
1925 if (object
== TARGET_OBJECT_MEMORY
1926 || object
== TARGET_OBJECT_STACK_MEMORY
1927 || object
== TARGET_OBJECT_CODE_MEMORY
1928 || object
== TARGET_OBJECT_RAW_MEMORY
)
1929 unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
1931 /* Give the progress callback a chance to set up. */
1933 (*progress
) (0, baton
);
1935 while (xfered_total
< len
)
1937 ULONGEST xfered_partial
;
1938 enum target_xfer_status status
;
1940 status
= target_write_partial (ops
, object
, annex
,
1941 buf
+ xfered_total
* unit_size
,
1942 offset
+ xfered_total
, len
- xfered_total
,
1945 if (status
!= TARGET_XFER_OK
)
1946 return status
== TARGET_XFER_EOF
? xfered_total
: TARGET_XFER_E_IO
;
1949 (*progress
) (xfered_partial
, baton
);
1951 xfered_total
+= xfered_partial
;
1957 /* For docs on target_write see target.h. */
1960 target_write (struct target_ops
*ops
,
1961 enum target_object object
,
1962 const char *annex
, const gdb_byte
*buf
,
1963 ULONGEST offset
, LONGEST len
)
1965 return target_write_with_progress (ops
, object
, annex
, buf
, offset
, len
,
1969 /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return
1970 the size of the transferred data. PADDING additional bytes are
1971 available in *BUF_P. This is a helper function for
1972 target_read_alloc; see the declaration of that function for more
1976 target_read_alloc_1 (struct target_ops
*ops
, enum target_object object
,
1977 const char *annex
, gdb_byte
**buf_p
, int padding
)
1979 size_t buf_alloc
, buf_pos
;
1982 /* This function does not have a length parameter; it reads the
1983 entire OBJECT). Also, it doesn't support objects fetched partly
1984 from one target and partly from another (in a different stratum,
1985 e.g. a core file and an executable). Both reasons make it
1986 unsuitable for reading memory. */
1987 gdb_assert (object
!= TARGET_OBJECT_MEMORY
);
1989 /* Start by reading up to 4K at a time. The target will throttle
1990 this number down if necessary. */
1992 buf
= (gdb_byte
*) xmalloc (buf_alloc
);
1996 ULONGEST xfered_len
;
1997 enum target_xfer_status status
;
1999 status
= target_read_partial (ops
, object
, annex
, &buf
[buf_pos
],
2000 buf_pos
, buf_alloc
- buf_pos
- padding
,
2003 if (status
== TARGET_XFER_EOF
)
2005 /* Read all there was. */
2012 else if (status
!= TARGET_XFER_OK
)
2014 /* An error occurred. */
2016 return TARGET_XFER_E_IO
;
2019 buf_pos
+= xfered_len
;
2021 /* If the buffer is filling up, expand it. */
2022 if (buf_alloc
< buf_pos
* 2)
2025 buf
= (gdb_byte
*) xrealloc (buf
, buf_alloc
);
2032 /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return
2033 the size of the transferred data. See the declaration in "target.h"
2034 function for more information about the return value. */
2037 target_read_alloc (struct target_ops
*ops
, enum target_object object
,
2038 const char *annex
, gdb_byte
**buf_p
)
2040 return target_read_alloc_1 (ops
, object
, annex
, buf_p
, 0);
2043 /* Read OBJECT/ANNEX using OPS. The result is NUL-terminated and
2044 returned as a string, allocated using xmalloc. If an error occurs
2045 or the transfer is unsupported, NULL is returned. Empty objects
2046 are returned as allocated but empty strings. A warning is issued
2047 if the result contains any embedded NUL bytes. */
2050 target_read_stralloc (struct target_ops
*ops
, enum target_object object
,
2055 LONGEST i
, transferred
;
2057 transferred
= target_read_alloc_1 (ops
, object
, annex
, &buffer
, 1);
2058 bufstr
= (char *) buffer
;
2060 if (transferred
< 0)
2063 if (transferred
== 0)
2064 return xstrdup ("");
2066 bufstr
[transferred
] = 0;
2068 /* Check for embedded NUL bytes; but allow trailing NULs. */
2069 for (i
= strlen (bufstr
); i
< transferred
; i
++)
2072 warning (_("target object %d, annex %s, "
2073 "contained unexpected null characters"),
2074 (int) object
, annex
? annex
: "(none)");
2081 /* Memory transfer methods. */
2084 get_target_memory (struct target_ops
*ops
, CORE_ADDR addr
, gdb_byte
*buf
,
2087 /* This method is used to read from an alternate, non-current
2088 target. This read must bypass the overlay support (as symbols
2089 don't match this target), and GDB's internal cache (wrong cache
2090 for this target). */
2091 if (target_read (ops
, TARGET_OBJECT_RAW_MEMORY
, NULL
, buf
, addr
, len
)
2093 memory_error (TARGET_XFER_E_IO
, addr
);
2097 get_target_memory_unsigned (struct target_ops
*ops
, CORE_ADDR addr
,
2098 int len
, enum bfd_endian byte_order
)
2100 gdb_byte buf
[sizeof (ULONGEST
)];
2102 gdb_assert (len
<= sizeof (buf
));
2103 get_target_memory (ops
, addr
, buf
, len
);
2104 return extract_unsigned_integer (buf
, len
, byte_order
);
2110 target_insert_breakpoint (struct gdbarch
*gdbarch
,
2111 struct bp_target_info
*bp_tgt
)
2113 if (!may_insert_breakpoints
)
2115 warning (_("May not insert breakpoints"));
2119 return current_target
.to_insert_breakpoint (¤t_target
,
2126 target_remove_breakpoint (struct gdbarch
*gdbarch
,
2127 struct bp_target_info
*bp_tgt
)
2129 /* This is kind of a weird case to handle, but the permission might
2130 have been changed after breakpoints were inserted - in which case
2131 we should just take the user literally and assume that any
2132 breakpoints should be left in place. */
2133 if (!may_insert_breakpoints
)
2135 warning (_("May not remove breakpoints"));
2139 return current_target
.to_remove_breakpoint (¤t_target
,
2144 target_info (char *args
, int from_tty
)
2146 struct target_ops
*t
;
2147 int has_all_mem
= 0;
2149 if (symfile_objfile
!= NULL
)
2150 printf_unfiltered (_("Symbols from \"%s\".\n"),
2151 objfile_name (symfile_objfile
));
2153 for (t
= target_stack
; t
!= NULL
; t
= t
->beneath
)
2155 if (!(*t
->to_has_memory
) (t
))
2158 if ((int) (t
->to_stratum
) <= (int) dummy_stratum
)
2161 printf_unfiltered (_("\tWhile running this, "
2162 "GDB does not access memory from...\n"));
2163 printf_unfiltered ("%s:\n", t
->to_longname
);
2164 (t
->to_files_info
) (t
);
2165 has_all_mem
= (*t
->to_has_all_memory
) (t
);
2169 /* This function is called before any new inferior is created, e.g.
2170 by running a program, attaching, or connecting to a target.
2171 It cleans up any state from previous invocations which might
2172 change between runs. This is a subset of what target_preopen
2173 resets (things which might change between targets). */
2176 target_pre_inferior (int from_tty
)
2178 /* Clear out solib state. Otherwise the solib state of the previous
2179 inferior might have survived and is entirely wrong for the new
2180 target. This has been observed on GNU/Linux using glibc 2.3. How
2192 Cannot access memory at address 0xdeadbeef
2195 /* In some OSs, the shared library list is the same/global/shared
2196 across inferiors. If code is shared between processes, so are
2197 memory regions and features. */
2198 if (!gdbarch_has_global_solist (target_gdbarch ()))
2200 no_shared_libraries (NULL
, from_tty
);
2202 invalidate_target_mem_regions ();
2204 target_clear_description ();
2207 /* attach_flag may be set if the previous process associated with
2208 the inferior was attached to. */
2209 current_inferior ()->attach_flag
= 0;
2211 current_inferior ()->highest_thread_num
= 0;
2213 agent_capability_invalidate ();
2216 /* Callback for iterate_over_inferiors. Gets rid of the given
2220 dispose_inferior (struct inferior
*inf
, void *args
)
2222 struct thread_info
*thread
;
2224 thread
= any_thread_of_process (inf
->pid
);
2227 switch_to_thread (thread
->ptid
);
2229 /* Core inferiors actually should be detached, not killed. */
2230 if (target_has_execution
)
2233 target_detach (NULL
, 0);
2239 /* This is to be called by the open routine before it does
2243 target_preopen (int from_tty
)
2247 if (have_inferiors ())
2250 || !have_live_inferiors ()
2251 || query (_("A program is being debugged already. Kill it? ")))
2252 iterate_over_inferiors (dispose_inferior
, NULL
);
2254 error (_("Program not killed."));
2257 /* Calling target_kill may remove the target from the stack. But if
2258 it doesn't (which seems like a win for UDI), remove it now. */
2259 /* Leave the exec target, though. The user may be switching from a
2260 live process to a core of the same program. */
2261 pop_all_targets_above (file_stratum
);
2263 target_pre_inferior (from_tty
);
2266 /* Detach a target after doing deferred register stores. */
2269 target_detach (const char *args
, int from_tty
)
2271 if (gdbarch_has_global_breakpoints (target_gdbarch ()))
2272 /* Don't remove global breakpoints here. They're removed on
2273 disconnection from the target. */
2276 /* If we're in breakpoints-always-inserted mode, have to remove
2277 them before detaching. */
2278 remove_breakpoints_pid (ptid_get_pid (inferior_ptid
));
2280 prepare_for_detach ();
2282 current_target
.to_detach (¤t_target
, args
, from_tty
);
2286 target_disconnect (const char *args
, int from_tty
)
2288 /* If we're in breakpoints-always-inserted mode or if breakpoints
2289 are global across processes, we have to remove them before
2291 remove_breakpoints ();
2293 current_target
.to_disconnect (¤t_target
, args
, from_tty
);
2297 target_wait (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
2299 return (current_target
.to_wait
) (¤t_target
, ptid
, status
, options
);
2305 default_target_wait (struct target_ops
*ops
,
2306 ptid_t ptid
, struct target_waitstatus
*status
,
2309 status
->kind
= TARGET_WAITKIND_IGNORE
;
2310 return minus_one_ptid
;
2314 target_pid_to_str (ptid_t ptid
)
2316 return (*current_target
.to_pid_to_str
) (¤t_target
, ptid
);
2320 target_thread_name (struct thread_info
*info
)
2322 return current_target
.to_thread_name (¤t_target
, info
);
2326 target_resume (ptid_t ptid
, int step
, enum gdb_signal signal
)
2328 target_dcache_invalidate ();
2330 current_target
.to_resume (¤t_target
, ptid
, step
, signal
);
2332 registers_changed_ptid (ptid
);
2333 /* We only set the internal executing state here. The user/frontend
2334 running state is set at a higher level. */
2335 set_executing (ptid
, 1);
2336 clear_inline_frame_state (ptid
);
2340 target_pass_signals (int numsigs
, unsigned char *pass_signals
)
2342 (*current_target
.to_pass_signals
) (¤t_target
, numsigs
, pass_signals
);
2346 target_program_signals (int numsigs
, unsigned char *program_signals
)
2348 (*current_target
.to_program_signals
) (¤t_target
,
2349 numsigs
, program_signals
);
2353 default_follow_fork (struct target_ops
*self
, int follow_child
,
2356 /* Some target returned a fork event, but did not know how to follow it. */
2357 internal_error (__FILE__
, __LINE__
,
2358 _("could not find a target to follow fork"));
2361 /* Look through the list of possible targets for a target that can
2365 target_follow_fork (int follow_child
, int detach_fork
)
2367 return current_target
.to_follow_fork (¤t_target
,
2368 follow_child
, detach_fork
);
2371 /* Target wrapper for follow exec hook. */
2374 target_follow_exec (struct inferior
*inf
, char *execd_pathname
)
2376 current_target
.to_follow_exec (¤t_target
, inf
, execd_pathname
);
2380 default_mourn_inferior (struct target_ops
*self
)
2382 internal_error (__FILE__
, __LINE__
,
2383 _("could not find a target to follow mourn inferior"));
2387 target_mourn_inferior (void)
2389 current_target
.to_mourn_inferior (¤t_target
);
2391 /* We no longer need to keep handles on any of the object files.
2392 Make sure to release them to avoid unnecessarily locking any
2393 of them while we're not actually debugging. */
2394 bfd_cache_close_all ();
2397 /* Look for a target which can describe architectural features, starting
2398 from TARGET. If we find one, return its description. */
2400 const struct target_desc
*
2401 target_read_description (struct target_ops
*target
)
2403 return target
->to_read_description (target
);
2406 /* This implements a basic search of memory, reading target memory and
2407 performing the search here (as opposed to performing the search in on the
2408 target side with, for example, gdbserver). */
2411 simple_search_memory (struct target_ops
*ops
,
2412 CORE_ADDR start_addr
, ULONGEST search_space_len
,
2413 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2414 CORE_ADDR
*found_addrp
)
2416 /* NOTE: also defined in find.c testcase. */
2417 #define SEARCH_CHUNK_SIZE 16000
2418 const unsigned chunk_size
= SEARCH_CHUNK_SIZE
;
2419 /* Buffer to hold memory contents for searching. */
2420 gdb_byte
*search_buf
;
2421 unsigned search_buf_size
;
2422 struct cleanup
*old_cleanups
;
2424 search_buf_size
= chunk_size
+ pattern_len
- 1;
2426 /* No point in trying to allocate a buffer larger than the search space. */
2427 if (search_space_len
< search_buf_size
)
2428 search_buf_size
= search_space_len
;
2430 search_buf
= (gdb_byte
*) malloc (search_buf_size
);
2431 if (search_buf
== NULL
)
2432 error (_("Unable to allocate memory to perform the search."));
2433 old_cleanups
= make_cleanup (free_current_contents
, &search_buf
);
2435 /* Prime the search buffer. */
2437 if (target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2438 search_buf
, start_addr
, search_buf_size
) != search_buf_size
)
2440 warning (_("Unable to access %s bytes of target "
2441 "memory at %s, halting search."),
2442 pulongest (search_buf_size
), hex_string (start_addr
));
2443 do_cleanups (old_cleanups
);
2447 /* Perform the search.
2449 The loop is kept simple by allocating [N + pattern-length - 1] bytes.
2450 When we've scanned N bytes we copy the trailing bytes to the start and
2451 read in another N bytes. */
2453 while (search_space_len
>= pattern_len
)
2455 gdb_byte
*found_ptr
;
2456 unsigned nr_search_bytes
= min (search_space_len
, search_buf_size
);
2458 found_ptr
= (gdb_byte
*) memmem (search_buf
, nr_search_bytes
,
2459 pattern
, pattern_len
);
2461 if (found_ptr
!= NULL
)
2463 CORE_ADDR found_addr
= start_addr
+ (found_ptr
- search_buf
);
2465 *found_addrp
= found_addr
;
2466 do_cleanups (old_cleanups
);
2470 /* Not found in this chunk, skip to next chunk. */
2472 /* Don't let search_space_len wrap here, it's unsigned. */
2473 if (search_space_len
>= chunk_size
)
2474 search_space_len
-= chunk_size
;
2476 search_space_len
= 0;
2478 if (search_space_len
>= pattern_len
)
2480 unsigned keep_len
= search_buf_size
- chunk_size
;
2481 CORE_ADDR read_addr
= start_addr
+ chunk_size
+ keep_len
;
2484 /* Copy the trailing part of the previous iteration to the front
2485 of the buffer for the next iteration. */
2486 gdb_assert (keep_len
== pattern_len
- 1);
2487 memcpy (search_buf
, search_buf
+ chunk_size
, keep_len
);
2489 nr_to_read
= min (search_space_len
- keep_len
, chunk_size
);
2491 if (target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2492 search_buf
+ keep_len
, read_addr
,
2493 nr_to_read
) != nr_to_read
)
2495 warning (_("Unable to access %s bytes of target "
2496 "memory at %s, halting search."),
2497 plongest (nr_to_read
),
2498 hex_string (read_addr
));
2499 do_cleanups (old_cleanups
);
2503 start_addr
+= chunk_size
;
2509 do_cleanups (old_cleanups
);
2513 /* Default implementation of memory-searching. */
2516 default_search_memory (struct target_ops
*self
,
2517 CORE_ADDR start_addr
, ULONGEST search_space_len
,
2518 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2519 CORE_ADDR
*found_addrp
)
2521 /* Start over from the top of the target stack. */
2522 return simple_search_memory (current_target
.beneath
,
2523 start_addr
, search_space_len
,
2524 pattern
, pattern_len
, found_addrp
);
2527 /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the
2528 sequence of bytes in PATTERN with length PATTERN_LEN.
2530 The result is 1 if found, 0 if not found, and -1 if there was an error
2531 requiring halting of the search (e.g. memory read error).
2532 If the pattern is found the address is recorded in FOUND_ADDRP. */
2535 target_search_memory (CORE_ADDR start_addr
, ULONGEST search_space_len
,
2536 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2537 CORE_ADDR
*found_addrp
)
2539 return current_target
.to_search_memory (¤t_target
, start_addr
,
2541 pattern
, pattern_len
, found_addrp
);
2544 /* Look through the currently pushed targets. If none of them will
2545 be able to restart the currently running process, issue an error
2549 target_require_runnable (void)
2551 struct target_ops
*t
;
2553 for (t
= target_stack
; t
!= NULL
; t
= t
->beneath
)
2555 /* If this target knows how to create a new program, then
2556 assume we will still be able to after killing the current
2557 one. Either killing and mourning will not pop T, or else
2558 find_default_run_target will find it again. */
2559 if (t
->to_create_inferior
!= NULL
)
2562 /* Do not worry about targets at certain strata that can not
2563 create inferiors. Assume they will be pushed again if
2564 necessary, and continue to the process_stratum. */
2565 if (t
->to_stratum
== thread_stratum
2566 || t
->to_stratum
== record_stratum
2567 || t
->to_stratum
== arch_stratum
)
2570 error (_("The \"%s\" target does not support \"run\". "
2571 "Try \"help target\" or \"continue\"."),
2575 /* This function is only called if the target is running. In that
2576 case there should have been a process_stratum target and it
2577 should either know how to create inferiors, or not... */
2578 internal_error (__FILE__
, __LINE__
, _("No targets found"));
2581 /* Whether GDB is allowed to fall back to the default run target for
2582 "run", "attach", etc. when no target is connected yet. */
2583 static int auto_connect_native_target
= 1;
2586 show_auto_connect_native_target (struct ui_file
*file
, int from_tty
,
2587 struct cmd_list_element
*c
, const char *value
)
2589 fprintf_filtered (file
,
2590 _("Whether GDB may automatically connect to the "
2591 "native target is %s.\n"),
2595 /* Look through the list of possible targets for a target that can
2596 execute a run or attach command without any other data. This is
2597 used to locate the default process stratum.
2599 If DO_MESG is not NULL, the result is always valid (error() is
2600 called for errors); else, return NULL on error. */
2602 static struct target_ops
*
2603 find_default_run_target (char *do_mesg
)
2605 struct target_ops
*runable
= NULL
;
2607 if (auto_connect_native_target
)
2609 struct target_ops
*t
;
2613 for (i
= 0; VEC_iterate (target_ops_p
, target_structs
, i
, t
); ++i
)
2615 if (t
->to_can_run
!= delegate_can_run
&& target_can_run (t
))
2626 if (runable
== NULL
)
2629 error (_("Don't know how to %s. Try \"help target\"."), do_mesg
);
2640 find_attach_target (void)
2642 struct target_ops
*t
;
2644 /* If a target on the current stack can attach, use it. */
2645 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2647 if (t
->to_attach
!= NULL
)
2651 /* Otherwise, use the default run target for attaching. */
2653 t
= find_default_run_target ("attach");
2661 find_run_target (void)
2663 struct target_ops
*t
;
2665 /* If a target on the current stack can attach, use it. */
2666 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2668 if (t
->to_create_inferior
!= NULL
)
2672 /* Otherwise, use the default run target. */
2674 t
= find_default_run_target ("run");
2679 /* Implement the "info proc" command. */
2682 target_info_proc (const char *args
, enum info_proc_what what
)
2684 struct target_ops
*t
;
2686 /* If we're already connected to something that can get us OS
2687 related data, use it. Otherwise, try using the native
2689 if (current_target
.to_stratum
>= process_stratum
)
2690 t
= current_target
.beneath
;
2692 t
= find_default_run_target (NULL
);
2694 for (; t
!= NULL
; t
= t
->beneath
)
2696 if (t
->to_info_proc
!= NULL
)
2698 t
->to_info_proc (t
, args
, what
);
2701 fprintf_unfiltered (gdb_stdlog
,
2702 "target_info_proc (\"%s\", %d)\n", args
, what
);
2712 find_default_supports_disable_randomization (struct target_ops
*self
)
2714 struct target_ops
*t
;
2716 t
= find_default_run_target (NULL
);
2717 if (t
&& t
->to_supports_disable_randomization
)
2718 return (t
->to_supports_disable_randomization
) (t
);
2723 target_supports_disable_randomization (void)
2725 struct target_ops
*t
;
2727 for (t
= ¤t_target
; t
!= NULL
; t
= t
->beneath
)
2728 if (t
->to_supports_disable_randomization
)
2729 return t
->to_supports_disable_randomization (t
);
2735 target_get_osdata (const char *type
)
2737 struct target_ops
*t
;
2739 /* If we're already connected to something that can get us OS
2740 related data, use it. Otherwise, try using the native
2742 if (current_target
.to_stratum
>= process_stratum
)
2743 t
= current_target
.beneath
;
2745 t
= find_default_run_target ("get OS data");
2750 return target_read_stralloc (t
, TARGET_OBJECT_OSDATA
, type
);
2753 static struct address_space
*
2754 default_thread_address_space (struct target_ops
*self
, ptid_t ptid
)
2756 struct inferior
*inf
;
2758 /* Fall-back to the "main" address space of the inferior. */
2759 inf
= find_inferior_ptid (ptid
);
2761 if (inf
== NULL
|| inf
->aspace
== NULL
)
2762 internal_error (__FILE__
, __LINE__
,
2763 _("Can't determine the current "
2764 "address space of thread %s\n"),
2765 target_pid_to_str (ptid
));
2770 /* Determine the current address space of thread PTID. */
2772 struct address_space
*
2773 target_thread_address_space (ptid_t ptid
)
2775 struct address_space
*aspace
;
2777 aspace
= current_target
.to_thread_address_space (¤t_target
, ptid
);
2778 gdb_assert (aspace
!= NULL
);
2784 /* Target file operations. */
2786 static struct target_ops
*
2787 default_fileio_target (void)
2789 /* If we're already connected to something that can perform
2790 file I/O, use it. Otherwise, try using the native target. */
2791 if (current_target
.to_stratum
>= process_stratum
)
2792 return current_target
.beneath
;
2794 return find_default_run_target ("file I/O");
2797 /* File handle for target file operations. */
2801 /* The target on which this file is open. */
2802 struct target_ops
*t
;
2804 /* The file descriptor on the target. */
2808 DEF_VEC_O (fileio_fh_t
);
2810 /* Vector of currently open file handles. The value returned by
2811 target_fileio_open and passed as the FD argument to other
2812 target_fileio_* functions is an index into this vector. This
2813 vector's entries are never freed; instead, files are marked as
2814 closed, and the handle becomes available for reuse. */
2815 static VEC (fileio_fh_t
) *fileio_fhandles
;
2817 /* Macro to check whether a fileio_fh_t represents a closed file. */
2818 #define is_closed_fileio_fh(fd) ((fd) < 0)
2820 /* Index into fileio_fhandles of the lowest handle that might be
2821 closed. This permits handle reuse without searching the whole
2822 list each time a new file is opened. */
2823 static int lowest_closed_fd
;
2825 /* Acquire a target fileio file descriptor. */
2828 acquire_fileio_fd (struct target_ops
*t
, int fd
)
2832 gdb_assert (!is_closed_fileio_fh (fd
));
2834 /* Search for closed handles to reuse. */
2836 VEC_iterate (fileio_fh_t
, fileio_fhandles
,
2837 lowest_closed_fd
, fh
);
2839 if (is_closed_fileio_fh (fh
->fd
))
2842 /* Push a new handle if no closed handles were found. */
2843 if (lowest_closed_fd
== VEC_length (fileio_fh_t
, fileio_fhandles
))
2844 fh
= VEC_safe_push (fileio_fh_t
, fileio_fhandles
, NULL
);
2846 /* Fill in the handle. */
2850 /* Return its index, and start the next lookup at
2852 return lowest_closed_fd
++;
2855 /* Release a target fileio file descriptor. */
2858 release_fileio_fd (int fd
, fileio_fh_t
*fh
)
2861 lowest_closed_fd
= min (lowest_closed_fd
, fd
);
2864 /* Return a pointer to the fileio_fhandle_t corresponding to FD. */
2866 #define fileio_fd_to_fh(fd) \
2867 VEC_index (fileio_fh_t, fileio_fhandles, (fd))
2869 /* Helper for target_fileio_open and
2870 target_fileio_open_warn_if_slow. */
2873 target_fileio_open_1 (struct inferior
*inf
, const char *filename
,
2874 int flags
, int mode
, int warn_if_slow
,
2877 struct target_ops
*t
;
2879 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
2881 if (t
->to_fileio_open
!= NULL
)
2883 int fd
= t
->to_fileio_open (t
, inf
, filename
, flags
, mode
,
2884 warn_if_slow
, target_errno
);
2889 fd
= acquire_fileio_fd (t
, fd
);
2892 fprintf_unfiltered (gdb_stdlog
,
2893 "target_fileio_open (%d,%s,0x%x,0%o,%d)"
2895 inf
== NULL
? 0 : inf
->num
,
2896 filename
, flags
, mode
,
2898 fd
!= -1 ? 0 : *target_errno
);
2903 *target_errno
= FILEIO_ENOSYS
;
2910 target_fileio_open (struct inferior
*inf
, const char *filename
,
2911 int flags
, int mode
, int *target_errno
)
2913 return target_fileio_open_1 (inf
, filename
, flags
, mode
, 0,
2920 target_fileio_open_warn_if_slow (struct inferior
*inf
,
2921 const char *filename
,
2922 int flags
, int mode
, int *target_errno
)
2924 return target_fileio_open_1 (inf
, filename
, flags
, mode
, 1,
2931 target_fileio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
2932 ULONGEST offset
, int *target_errno
)
2934 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
2937 if (is_closed_fileio_fh (fh
->fd
))
2938 *target_errno
= EBADF
;
2940 ret
= fh
->t
->to_fileio_pwrite (fh
->t
, fh
->fd
, write_buf
,
2941 len
, offset
, target_errno
);
2944 fprintf_unfiltered (gdb_stdlog
,
2945 "target_fileio_pwrite (%d,...,%d,%s) "
2947 fd
, len
, pulongest (offset
),
2948 ret
, ret
!= -1 ? 0 : *target_errno
);
2955 target_fileio_pread (int fd
, gdb_byte
*read_buf
, int len
,
2956 ULONGEST offset
, int *target_errno
)
2958 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
2961 if (is_closed_fileio_fh (fh
->fd
))
2962 *target_errno
= EBADF
;
2964 ret
= fh
->t
->to_fileio_pread (fh
->t
, fh
->fd
, read_buf
,
2965 len
, offset
, target_errno
);
2968 fprintf_unfiltered (gdb_stdlog
,
2969 "target_fileio_pread (%d,...,%d,%s) "
2971 fd
, len
, pulongest (offset
),
2972 ret
, ret
!= -1 ? 0 : *target_errno
);
2979 target_fileio_fstat (int fd
, struct stat
*sb
, int *target_errno
)
2981 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
2984 if (is_closed_fileio_fh (fh
->fd
))
2985 *target_errno
= EBADF
;
2987 ret
= fh
->t
->to_fileio_fstat (fh
->t
, fh
->fd
, sb
, target_errno
);
2990 fprintf_unfiltered (gdb_stdlog
,
2991 "target_fileio_fstat (%d) = %d (%d)\n",
2992 fd
, ret
, ret
!= -1 ? 0 : *target_errno
);
2999 target_fileio_close (int fd
, int *target_errno
)
3001 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
3004 if (is_closed_fileio_fh (fh
->fd
))
3005 *target_errno
= EBADF
;
3008 ret
= fh
->t
->to_fileio_close (fh
->t
, fh
->fd
, target_errno
);
3009 release_fileio_fd (fd
, fh
);
3013 fprintf_unfiltered (gdb_stdlog
,
3014 "target_fileio_close (%d) = %d (%d)\n",
3015 fd
, ret
, ret
!= -1 ? 0 : *target_errno
);
3022 target_fileio_unlink (struct inferior
*inf
, const char *filename
,
3025 struct target_ops
*t
;
3027 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
3029 if (t
->to_fileio_unlink
!= NULL
)
3031 int ret
= t
->to_fileio_unlink (t
, inf
, filename
,
3035 fprintf_unfiltered (gdb_stdlog
,
3036 "target_fileio_unlink (%d,%s)"
3038 inf
== NULL
? 0 : inf
->num
, filename
,
3039 ret
, ret
!= -1 ? 0 : *target_errno
);
3044 *target_errno
= FILEIO_ENOSYS
;
3051 target_fileio_readlink (struct inferior
*inf
, const char *filename
,
3054 struct target_ops
*t
;
3056 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
3058 if (t
->to_fileio_readlink
!= NULL
)
3060 char *ret
= t
->to_fileio_readlink (t
, inf
, filename
,
3064 fprintf_unfiltered (gdb_stdlog
,
3065 "target_fileio_readlink (%d,%s)"
3067 inf
== NULL
? 0 : inf
->num
,
3068 filename
, ret
? ret
: "(nil)",
3069 ret
? 0 : *target_errno
);
3074 *target_errno
= FILEIO_ENOSYS
;
3079 target_fileio_close_cleanup (void *opaque
)
3081 int fd
= *(int *) opaque
;
3084 target_fileio_close (fd
, &target_errno
);
3087 /* Read target file FILENAME, in the filesystem as seen by INF. If
3088 INF is NULL, use the filesystem seen by the debugger (GDB or, for
3089 remote targets, the remote stub). Store the result in *BUF_P and
3090 return the size of the transferred data. PADDING additional bytes
3091 are available in *BUF_P. This is a helper function for
3092 target_fileio_read_alloc; see the declaration of that function for
3093 more information. */
3096 target_fileio_read_alloc_1 (struct inferior
*inf
, const char *filename
,
3097 gdb_byte
**buf_p
, int padding
)
3099 struct cleanup
*close_cleanup
;
3100 size_t buf_alloc
, buf_pos
;
3106 fd
= target_fileio_open (inf
, filename
, FILEIO_O_RDONLY
, 0700,
3111 close_cleanup
= make_cleanup (target_fileio_close_cleanup
, &fd
);
3113 /* Start by reading up to 4K at a time. The target will throttle
3114 this number down if necessary. */
3116 buf
= (gdb_byte
*) xmalloc (buf_alloc
);
3120 n
= target_fileio_pread (fd
, &buf
[buf_pos
],
3121 buf_alloc
- buf_pos
- padding
, buf_pos
,
3125 /* An error occurred. */
3126 do_cleanups (close_cleanup
);
3132 /* Read all there was. */
3133 do_cleanups (close_cleanup
);
3143 /* If the buffer is filling up, expand it. */
3144 if (buf_alloc
< buf_pos
* 2)
3147 buf
= (gdb_byte
*) xrealloc (buf
, buf_alloc
);
3157 target_fileio_read_alloc (struct inferior
*inf
, const char *filename
,
3160 return target_fileio_read_alloc_1 (inf
, filename
, buf_p
, 0);
3166 target_fileio_read_stralloc (struct inferior
*inf
, const char *filename
)
3170 LONGEST i
, transferred
;
3172 transferred
= target_fileio_read_alloc_1 (inf
, filename
, &buffer
, 1);
3173 bufstr
= (char *) buffer
;
3175 if (transferred
< 0)
3178 if (transferred
== 0)
3179 return xstrdup ("");
3181 bufstr
[transferred
] = 0;
3183 /* Check for embedded NUL bytes; but allow trailing NULs. */
3184 for (i
= strlen (bufstr
); i
< transferred
; i
++)
3187 warning (_("target file %s "
3188 "contained unexpected null characters"),
3198 default_region_ok_for_hw_watchpoint (struct target_ops
*self
,
3199 CORE_ADDR addr
, int len
)
3201 return (len
<= gdbarch_ptr_bit (target_gdbarch ()) / TARGET_CHAR_BIT
);
3205 default_watchpoint_addr_within_range (struct target_ops
*target
,
3207 CORE_ADDR start
, int length
)
3209 return addr
>= start
&& addr
< start
+ length
;
3212 static struct gdbarch
*
3213 default_thread_architecture (struct target_ops
*ops
, ptid_t ptid
)
3215 return target_gdbarch ();
3219 return_zero (struct target_ops
*ignore
)
3225 return_zero_has_execution (struct target_ops
*ignore
, ptid_t ignore2
)
3231 * Find the next target down the stack from the specified target.
3235 find_target_beneath (struct target_ops
*t
)
3243 find_target_at (enum strata stratum
)
3245 struct target_ops
*t
;
3247 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3248 if (t
->to_stratum
== stratum
)
3259 target_announce_detach (int from_tty
)
3267 exec_file
= get_exec_file (0);
3268 if (exec_file
== NULL
)
3271 pid
= ptid_get_pid (inferior_ptid
);
3272 printf_unfiltered (_("Detaching from program: %s, %s\n"), exec_file
,
3273 target_pid_to_str (pid_to_ptid (pid
)));
3274 gdb_flush (gdb_stdout
);
3277 /* The inferior process has died. Long live the inferior! */
3280 generic_mourn_inferior (void)
3284 ptid
= inferior_ptid
;
3285 inferior_ptid
= null_ptid
;
3287 /* Mark breakpoints uninserted in case something tries to delete a
3288 breakpoint while we delete the inferior's threads (which would
3289 fail, since the inferior is long gone). */
3290 mark_breakpoints_out ();
3292 if (!ptid_equal (ptid
, null_ptid
))
3294 int pid
= ptid_get_pid (ptid
);
3295 exit_inferior (pid
);
3298 /* Note this wipes step-resume breakpoints, so needs to be done
3299 after exit_inferior, which ends up referencing the step-resume
3300 breakpoints through clear_thread_inferior_resources. */
3301 breakpoint_init_inferior (inf_exited
);
3303 registers_changed ();
3305 reopen_exec_file ();
3306 reinit_frame_cache ();
3308 if (deprecated_detach_hook
)
3309 deprecated_detach_hook ();
3312 /* Convert a normal process ID to a string. Returns the string in a
3316 normal_pid_to_str (ptid_t ptid
)
3318 static char buf
[32];
3320 xsnprintf (buf
, sizeof buf
, "process %d", ptid_get_pid (ptid
));
3325 default_pid_to_str (struct target_ops
*ops
, ptid_t ptid
)
3327 return normal_pid_to_str (ptid
);
3330 /* Error-catcher for target_find_memory_regions. */
3332 dummy_find_memory_regions (struct target_ops
*self
,
3333 find_memory_region_ftype ignore1
, void *ignore2
)
3335 error (_("Command not implemented for this target."));
3339 /* Error-catcher for target_make_corefile_notes. */
3341 dummy_make_corefile_notes (struct target_ops
*self
,
3342 bfd
*ignore1
, int *ignore2
)
3344 error (_("Command not implemented for this target."));
3348 /* Set up the handful of non-empty slots needed by the dummy target
3352 init_dummy_target (void)
3354 dummy_target
.to_shortname
= "None";
3355 dummy_target
.to_longname
= "None";
3356 dummy_target
.to_doc
= "";
3357 dummy_target
.to_supports_disable_randomization
3358 = find_default_supports_disable_randomization
;
3359 dummy_target
.to_stratum
= dummy_stratum
;
3360 dummy_target
.to_has_all_memory
= return_zero
;
3361 dummy_target
.to_has_memory
= return_zero
;
3362 dummy_target
.to_has_stack
= return_zero
;
3363 dummy_target
.to_has_registers
= return_zero
;
3364 dummy_target
.to_has_execution
= return_zero_has_execution
;
3365 dummy_target
.to_magic
= OPS_MAGIC
;
3367 install_dummy_methods (&dummy_target
);
3372 target_close (struct target_ops
*targ
)
3374 gdb_assert (!target_is_pushed (targ
));
3376 if (targ
->to_xclose
!= NULL
)
3377 targ
->to_xclose (targ
);
3378 else if (targ
->to_close
!= NULL
)
3379 targ
->to_close (targ
);
3382 fprintf_unfiltered (gdb_stdlog
, "target_close ()\n");
3386 target_thread_alive (ptid_t ptid
)
3388 return current_target
.to_thread_alive (¤t_target
, ptid
);
3392 target_update_thread_list (void)
3394 current_target
.to_update_thread_list (¤t_target
);
3398 target_stop (ptid_t ptid
)
3402 warning (_("May not interrupt or stop the target, ignoring attempt"));
3406 (*current_target
.to_stop
) (¤t_target
, ptid
);
3410 target_interrupt (ptid_t ptid
)
3414 warning (_("May not interrupt or stop the target, ignoring attempt"));
3418 (*current_target
.to_interrupt
) (¤t_target
, ptid
);
3424 target_pass_ctrlc (void)
3426 (*current_target
.to_pass_ctrlc
) (¤t_target
);
3432 default_target_pass_ctrlc (struct target_ops
*ops
)
3434 target_interrupt (inferior_ptid
);
3437 /* See target/target.h. */
3440 target_stop_and_wait (ptid_t ptid
)
3442 struct target_waitstatus status
;
3443 int was_non_stop
= non_stop
;
3448 memset (&status
, 0, sizeof (status
));
3449 target_wait (ptid
, &status
, 0);
3451 non_stop
= was_non_stop
;
3454 /* See target/target.h. */
3457 target_continue_no_signal (ptid_t ptid
)
3459 target_resume (ptid
, 0, GDB_SIGNAL_0
);
3462 /* Concatenate ELEM to LIST, a comma separate list, and return the
3463 result. The LIST incoming argument is released. */
3466 str_comma_list_concat_elem (char *list
, const char *elem
)
3469 return xstrdup (elem
);
3471 return reconcat (list
, list
, ", ", elem
, (char *) NULL
);
3474 /* Helper for target_options_to_string. If OPT is present in
3475 TARGET_OPTIONS, append the OPT_STR (string version of OPT) in RET.
3476 Returns the new resulting string. OPT is removed from
3480 do_option (int *target_options
, char *ret
,
3481 int opt
, char *opt_str
)
3483 if ((*target_options
& opt
) != 0)
3485 ret
= str_comma_list_concat_elem (ret
, opt_str
);
3486 *target_options
&= ~opt
;
3493 target_options_to_string (int target_options
)
3497 #define DO_TARG_OPTION(OPT) \
3498 ret = do_option (&target_options, ret, OPT, #OPT)
3500 DO_TARG_OPTION (TARGET_WNOHANG
);
3502 if (target_options
!= 0)
3503 ret
= str_comma_list_concat_elem (ret
, "unknown???");
3511 debug_print_register (const char * func
,
3512 struct regcache
*regcache
, int regno
)
3514 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
3516 fprintf_unfiltered (gdb_stdlog
, "%s ", func
);
3517 if (regno
>= 0 && regno
< gdbarch_num_regs (gdbarch
)
3518 && gdbarch_register_name (gdbarch
, regno
) != NULL
3519 && gdbarch_register_name (gdbarch
, regno
)[0] != '\0')
3520 fprintf_unfiltered (gdb_stdlog
, "(%s)",
3521 gdbarch_register_name (gdbarch
, regno
));
3523 fprintf_unfiltered (gdb_stdlog
, "(%d)", regno
);
3524 if (regno
>= 0 && regno
< gdbarch_num_regs (gdbarch
))
3526 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
3527 int i
, size
= register_size (gdbarch
, regno
);
3528 gdb_byte buf
[MAX_REGISTER_SIZE
];
3530 regcache_raw_collect (regcache
, regno
, buf
);
3531 fprintf_unfiltered (gdb_stdlog
, " = ");
3532 for (i
= 0; i
< size
; i
++)
3534 fprintf_unfiltered (gdb_stdlog
, "%02x", buf
[i
]);
3536 if (size
<= sizeof (LONGEST
))
3538 ULONGEST val
= extract_unsigned_integer (buf
, size
, byte_order
);
3540 fprintf_unfiltered (gdb_stdlog
, " %s %s",
3541 core_addr_to_string_nz (val
), plongest (val
));
3544 fprintf_unfiltered (gdb_stdlog
, "\n");
3548 target_fetch_registers (struct regcache
*regcache
, int regno
)
3550 current_target
.to_fetch_registers (¤t_target
, regcache
, regno
);
3552 debug_print_register ("target_fetch_registers", regcache
, regno
);
3556 target_store_registers (struct regcache
*regcache
, int regno
)
3558 if (!may_write_registers
)
3559 error (_("Writing to registers is not allowed (regno %d)"), regno
);
3561 current_target
.to_store_registers (¤t_target
, regcache
, regno
);
3564 debug_print_register ("target_store_registers", regcache
, regno
);
3569 target_core_of_thread (ptid_t ptid
)
3571 return current_target
.to_core_of_thread (¤t_target
, ptid
);
3575 simple_verify_memory (struct target_ops
*ops
,
3576 const gdb_byte
*data
, CORE_ADDR lma
, ULONGEST size
)
3578 LONGEST total_xfered
= 0;
3580 while (total_xfered
< size
)
3582 ULONGEST xfered_len
;
3583 enum target_xfer_status status
;
3585 ULONGEST howmuch
= min (sizeof (buf
), size
- total_xfered
);
3587 status
= target_xfer_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
3588 buf
, NULL
, lma
+ total_xfered
, howmuch
,
3590 if (status
== TARGET_XFER_OK
3591 && memcmp (data
+ total_xfered
, buf
, xfered_len
) == 0)
3593 total_xfered
+= xfered_len
;
3602 /* Default implementation of memory verification. */
3605 default_verify_memory (struct target_ops
*self
,
3606 const gdb_byte
*data
, CORE_ADDR memaddr
, ULONGEST size
)
3608 /* Start over from the top of the target stack. */
3609 return simple_verify_memory (current_target
.beneath
,
3610 data
, memaddr
, size
);
3614 target_verify_memory (const gdb_byte
*data
, CORE_ADDR memaddr
, ULONGEST size
)
3616 return current_target
.to_verify_memory (¤t_target
,
3617 data
, memaddr
, size
);
3620 /* The documentation for this function is in its prototype declaration in
3624 target_insert_mask_watchpoint (CORE_ADDR addr
, CORE_ADDR mask
,
3625 enum target_hw_bp_type rw
)
3627 return current_target
.to_insert_mask_watchpoint (¤t_target
,
3631 /* The documentation for this function is in its prototype declaration in
3635 target_remove_mask_watchpoint (CORE_ADDR addr
, CORE_ADDR mask
,
3636 enum target_hw_bp_type rw
)
3638 return current_target
.to_remove_mask_watchpoint (¤t_target
,
3642 /* The documentation for this function is in its prototype declaration
3646 target_masked_watch_num_registers (CORE_ADDR addr
, CORE_ADDR mask
)
3648 return current_target
.to_masked_watch_num_registers (¤t_target
,
3652 /* The documentation for this function is in its prototype declaration
3656 target_ranged_break_num_registers (void)
3658 return current_target
.to_ranged_break_num_registers (¤t_target
);
3664 target_supports_btrace (enum btrace_format format
)
3666 return current_target
.to_supports_btrace (¤t_target
, format
);
3671 struct btrace_target_info
*
3672 target_enable_btrace (ptid_t ptid
, const struct btrace_config
*conf
)
3674 return current_target
.to_enable_btrace (¤t_target
, ptid
, conf
);
3680 target_disable_btrace (struct btrace_target_info
*btinfo
)
3682 current_target
.to_disable_btrace (¤t_target
, btinfo
);
3688 target_teardown_btrace (struct btrace_target_info
*btinfo
)
3690 current_target
.to_teardown_btrace (¤t_target
, btinfo
);
3696 target_read_btrace (struct btrace_data
*btrace
,
3697 struct btrace_target_info
*btinfo
,
3698 enum btrace_read_type type
)
3700 return current_target
.to_read_btrace (¤t_target
, btrace
, btinfo
, type
);
3705 const struct btrace_config
*
3706 target_btrace_conf (const struct btrace_target_info
*btinfo
)
3708 return current_target
.to_btrace_conf (¤t_target
, btinfo
);
3714 target_stop_recording (void)
3716 current_target
.to_stop_recording (¤t_target
);
3722 target_save_record (const char *filename
)
3724 current_target
.to_save_record (¤t_target
, filename
);
3730 target_supports_delete_record (void)
3732 struct target_ops
*t
;
3734 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3735 if (t
->to_delete_record
!= delegate_delete_record
3736 && t
->to_delete_record
!= tdefault_delete_record
)
3745 target_delete_record (void)
3747 current_target
.to_delete_record (¤t_target
);
3753 target_record_is_replaying (ptid_t ptid
)
3755 return current_target
.to_record_is_replaying (¤t_target
, ptid
);
3761 target_record_will_replay (ptid_t ptid
, int dir
)
3763 return current_target
.to_record_will_replay (¤t_target
, ptid
, dir
);
3769 target_record_stop_replaying (void)
3771 current_target
.to_record_stop_replaying (¤t_target
);
3777 target_goto_record_begin (void)
3779 current_target
.to_goto_record_begin (¤t_target
);
3785 target_goto_record_end (void)
3787 current_target
.to_goto_record_end (¤t_target
);
3793 target_goto_record (ULONGEST insn
)
3795 current_target
.to_goto_record (¤t_target
, insn
);
3801 target_insn_history (int size
, int flags
)
3803 current_target
.to_insn_history (¤t_target
, size
, flags
);
3809 target_insn_history_from (ULONGEST from
, int size
, int flags
)
3811 current_target
.to_insn_history_from (¤t_target
, from
, size
, flags
);
3817 target_insn_history_range (ULONGEST begin
, ULONGEST end
, int flags
)
3819 current_target
.to_insn_history_range (¤t_target
, begin
, end
, flags
);
3825 target_call_history (int size
, int flags
)
3827 current_target
.to_call_history (¤t_target
, size
, flags
);
3833 target_call_history_from (ULONGEST begin
, int size
, int flags
)
3835 current_target
.to_call_history_from (¤t_target
, begin
, size
, flags
);
3841 target_call_history_range (ULONGEST begin
, ULONGEST end
, int flags
)
3843 current_target
.to_call_history_range (¤t_target
, begin
, end
, flags
);
3848 const struct frame_unwind
*
3849 target_get_unwinder (void)
3851 return current_target
.to_get_unwinder (¤t_target
);
3856 const struct frame_unwind
*
3857 target_get_tailcall_unwinder (void)
3859 return current_target
.to_get_tailcall_unwinder (¤t_target
);
3865 target_prepare_to_generate_core (void)
3867 current_target
.to_prepare_to_generate_core (¤t_target
);
3873 target_done_generating_core (void)
3875 current_target
.to_done_generating_core (¤t_target
);
3879 setup_target_debug (void)
3881 memcpy (&debug_target
, ¤t_target
, sizeof debug_target
);
3883 init_debug_target (¤t_target
);
3887 static char targ_desc
[] =
3888 "Names of targets and files being debugged.\nShows the entire \
3889 stack of targets currently in use (including the exec-file,\n\
3890 core-file, and process, if any), as well as the symbol file name.";
3893 default_rcmd (struct target_ops
*self
, const char *command
,
3894 struct ui_file
*output
)
3896 error (_("\"monitor\" command not supported by this target."));
3900 do_monitor_command (char *cmd
,
3903 target_rcmd (cmd
, gdb_stdtarg
);
3906 /* Print the name of each layers of our target stack. */
3909 maintenance_print_target_stack (char *cmd
, int from_tty
)
3911 struct target_ops
*t
;
3913 printf_filtered (_("The current target stack is:\n"));
3915 for (t
= target_stack
; t
!= NULL
; t
= t
->beneath
)
3917 printf_filtered (" - %s (%s)\n", t
->to_shortname
, t
->to_longname
);
3924 target_async (int enable
)
3926 infrun_async (enable
);
3927 current_target
.to_async (¤t_target
, enable
);
3933 target_thread_events (int enable
)
3935 current_target
.to_thread_events (¤t_target
, enable
);
3938 /* Controls if targets can report that they can/are async. This is
3939 just for maintainers to use when debugging gdb. */
3940 int target_async_permitted
= 1;
3942 /* The set command writes to this variable. If the inferior is
3943 executing, target_async_permitted is *not* updated. */
3944 static int target_async_permitted_1
= 1;
3947 maint_set_target_async_command (char *args
, int from_tty
,
3948 struct cmd_list_element
*c
)
3950 if (have_live_inferiors ())
3952 target_async_permitted_1
= target_async_permitted
;
3953 error (_("Cannot change this setting while the inferior is running."));
3956 target_async_permitted
= target_async_permitted_1
;
3960 maint_show_target_async_command (struct ui_file
*file
, int from_tty
,
3961 struct cmd_list_element
*c
,
3964 fprintf_filtered (file
,
3965 _("Controlling the inferior in "
3966 "asynchronous mode is %s.\n"), value
);
3969 /* Return true if the target operates in non-stop mode even with "set
3973 target_always_non_stop_p (void)
3975 return current_target
.to_always_non_stop_p (¤t_target
);
3981 target_is_non_stop_p (void)
3984 || target_non_stop_enabled
== AUTO_BOOLEAN_TRUE
3985 || (target_non_stop_enabled
== AUTO_BOOLEAN_AUTO
3986 && target_always_non_stop_p ()));
3989 /* Controls if targets can report that they always run in non-stop
3990 mode. This is just for maintainers to use when debugging gdb. */
3991 enum auto_boolean target_non_stop_enabled
= AUTO_BOOLEAN_AUTO
;
3993 /* The set command writes to this variable. If the inferior is
3994 executing, target_non_stop_enabled is *not* updated. */
3995 static enum auto_boolean target_non_stop_enabled_1
= AUTO_BOOLEAN_AUTO
;
3997 /* Implementation of "maint set target-non-stop". */
4000 maint_set_target_non_stop_command (char *args
, int from_tty
,
4001 struct cmd_list_element
*c
)
4003 if (have_live_inferiors ())
4005 target_non_stop_enabled_1
= target_non_stop_enabled
;
4006 error (_("Cannot change this setting while the inferior is running."));
4009 target_non_stop_enabled
= target_non_stop_enabled_1
;
4012 /* Implementation of "maint show target-non-stop". */
4015 maint_show_target_non_stop_command (struct ui_file
*file
, int from_tty
,
4016 struct cmd_list_element
*c
,
4019 if (target_non_stop_enabled
== AUTO_BOOLEAN_AUTO
)
4020 fprintf_filtered (file
,
4021 _("Whether the target is always in non-stop mode "
4022 "is %s (currently %s).\n"), value
,
4023 target_always_non_stop_p () ? "on" : "off");
4025 fprintf_filtered (file
,
4026 _("Whether the target is always in non-stop mode "
4027 "is %s.\n"), value
);
4030 /* Temporary copies of permission settings. */
4032 static int may_write_registers_1
= 1;
4033 static int may_write_memory_1
= 1;
4034 static int may_insert_breakpoints_1
= 1;
4035 static int may_insert_tracepoints_1
= 1;
4036 static int may_insert_fast_tracepoints_1
= 1;
4037 static int may_stop_1
= 1;
4039 /* Make the user-set values match the real values again. */
4042 update_target_permissions (void)
4044 may_write_registers_1
= may_write_registers
;
4045 may_write_memory_1
= may_write_memory
;
4046 may_insert_breakpoints_1
= may_insert_breakpoints
;
4047 may_insert_tracepoints_1
= may_insert_tracepoints
;
4048 may_insert_fast_tracepoints_1
= may_insert_fast_tracepoints
;
4049 may_stop_1
= may_stop
;
4052 /* The one function handles (most of) the permission flags in the same
4056 set_target_permissions (char *args
, int from_tty
,
4057 struct cmd_list_element
*c
)
4059 if (target_has_execution
)
4061 update_target_permissions ();
4062 error (_("Cannot change this setting while the inferior is running."));
4065 /* Make the real values match the user-changed values. */
4066 may_write_registers
= may_write_registers_1
;
4067 may_insert_breakpoints
= may_insert_breakpoints_1
;
4068 may_insert_tracepoints
= may_insert_tracepoints_1
;
4069 may_insert_fast_tracepoints
= may_insert_fast_tracepoints_1
;
4070 may_stop
= may_stop_1
;
4071 update_observer_mode ();
4074 /* Set memory write permission independently of observer mode. */
4077 set_write_memory_permission (char *args
, int from_tty
,
4078 struct cmd_list_element
*c
)
4080 /* Make the real values match the user-changed values. */
4081 may_write_memory
= may_write_memory_1
;
4082 update_observer_mode ();
4087 initialize_targets (void)
4089 init_dummy_target ();
4090 push_target (&dummy_target
);
4092 add_info ("target", target_info
, targ_desc
);
4093 add_info ("files", target_info
, targ_desc
);
4095 add_setshow_zuinteger_cmd ("target", class_maintenance
, &targetdebug
, _("\
4096 Set target debugging."), _("\
4097 Show target debugging."), _("\
4098 When non-zero, target debugging is enabled. Higher numbers are more\n\
4102 &setdebuglist
, &showdebuglist
);
4104 add_setshow_boolean_cmd ("trust-readonly-sections", class_support
,
4105 &trust_readonly
, _("\
4106 Set mode for reading from readonly sections."), _("\
4107 Show mode for reading from readonly sections."), _("\
4108 When this mode is on, memory reads from readonly sections (such as .text)\n\
4109 will be read from the object file instead of from the target. This will\n\
4110 result in significant performance improvement for remote targets."),
4112 show_trust_readonly
,
4113 &setlist
, &showlist
);
4115 add_com ("monitor", class_obscure
, do_monitor_command
,
4116 _("Send a command to the remote monitor (remote targets only)."));
4118 add_cmd ("target-stack", class_maintenance
, maintenance_print_target_stack
,
4119 _("Print the name of each layer of the internal target stack."),
4120 &maintenanceprintlist
);
4122 add_setshow_boolean_cmd ("target-async", no_class
,
4123 &target_async_permitted_1
, _("\
4124 Set whether gdb controls the inferior in asynchronous mode."), _("\
4125 Show whether gdb controls the inferior in asynchronous mode."), _("\
4126 Tells gdb whether to control the inferior in asynchronous mode."),
4127 maint_set_target_async_command
,
4128 maint_show_target_async_command
,
4129 &maintenance_set_cmdlist
,
4130 &maintenance_show_cmdlist
);
4132 add_setshow_auto_boolean_cmd ("target-non-stop", no_class
,
4133 &target_non_stop_enabled_1
, _("\
4134 Set whether gdb always controls the inferior in non-stop mode."), _("\
4135 Show whether gdb always controls the inferior in non-stop mode."), _("\
4136 Tells gdb whether to control the inferior in non-stop mode."),
4137 maint_set_target_non_stop_command
,
4138 maint_show_target_non_stop_command
,
4139 &maintenance_set_cmdlist
,
4140 &maintenance_show_cmdlist
);
4142 add_setshow_boolean_cmd ("may-write-registers", class_support
,
4143 &may_write_registers_1
, _("\
4144 Set permission to write into registers."), _("\
4145 Show permission to write into registers."), _("\
4146 When this permission is on, GDB may write into the target's registers.\n\
4147 Otherwise, any sort of write attempt will result in an error."),
4148 set_target_permissions
, NULL
,
4149 &setlist
, &showlist
);
4151 add_setshow_boolean_cmd ("may-write-memory", class_support
,
4152 &may_write_memory_1
, _("\
4153 Set permission to write into target memory."), _("\
4154 Show permission to write into target memory."), _("\
4155 When this permission is on, GDB may write into the target's memory.\n\
4156 Otherwise, any sort of write attempt will result in an error."),
4157 set_write_memory_permission
, NULL
,
4158 &setlist
, &showlist
);
4160 add_setshow_boolean_cmd ("may-insert-breakpoints", class_support
,
4161 &may_insert_breakpoints_1
, _("\
4162 Set permission to insert breakpoints in the target."), _("\
4163 Show permission to insert breakpoints in the target."), _("\
4164 When this permission is on, GDB may insert breakpoints in the program.\n\
4165 Otherwise, any sort of insertion attempt will result in an error."),
4166 set_target_permissions
, NULL
,
4167 &setlist
, &showlist
);
4169 add_setshow_boolean_cmd ("may-insert-tracepoints", class_support
,
4170 &may_insert_tracepoints_1
, _("\
4171 Set permission to insert tracepoints in the target."), _("\
4172 Show permission to insert tracepoints in the target."), _("\
4173 When this permission is on, GDB may insert tracepoints in the program.\n\
4174 Otherwise, any sort of insertion attempt will result in an error."),
4175 set_target_permissions
, NULL
,
4176 &setlist
, &showlist
);
4178 add_setshow_boolean_cmd ("may-insert-fast-tracepoints", class_support
,
4179 &may_insert_fast_tracepoints_1
, _("\
4180 Set permission to insert fast tracepoints in the target."), _("\
4181 Show permission to insert fast tracepoints in the target."), _("\
4182 When this permission is on, GDB may insert fast tracepoints.\n\
4183 Otherwise, any sort of insertion attempt will result in an error."),
4184 set_target_permissions
, NULL
,
4185 &setlist
, &showlist
);
4187 add_setshow_boolean_cmd ("may-interrupt", class_support
,
4189 Set permission to interrupt or signal the target."), _("\
4190 Show permission to interrupt or signal the target."), _("\
4191 When this permission is on, GDB may interrupt/stop the target's execution.\n\
4192 Otherwise, any attempt to interrupt or stop will be ignored."),
4193 set_target_permissions
, NULL
,
4194 &setlist
, &showlist
);
4196 add_setshow_boolean_cmd ("auto-connect-native-target", class_support
,
4197 &auto_connect_native_target
, _("\
4198 Set whether GDB may automatically connect to the native target."), _("\
4199 Show whether GDB may automatically connect to the native target."), _("\
4200 When on, and GDB is not connected to a target yet, GDB\n\
4201 attempts \"run\" and other commands with the native target."),
4202 NULL
, show_auto_connect_native_target
,
4203 &setlist
, &showlist
);