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
485 terminal. Use target_can_async_p, not target_is_async_p, since at
486 this point the target is not async yet. However, if sync_execution
487 is not set, we know it will become async prior to resume. */
488 if (target_can_async_p () && !sync_execution
)
491 /* Always delete the current UI's input file handler, regardless of
492 terminal_state, because terminal_state is only valid for the main
494 delete_file_handler (ui
->input_fd
);
496 if (terminal_state
== terminal_is_inferior
)
499 /* If GDB is resuming the inferior in the foreground, install
500 inferior's terminal modes. */
501 (*current_target
.to_terminal_inferior
) (¤t_target
);
502 terminal_state
= terminal_is_inferior
;
504 /* If the user hit C-c before, pretend that it was hit right
506 if (check_quit_flag ())
507 target_pass_ctrlc ();
513 target_terminal_ours (void)
515 struct ui
*ui
= current_ui
;
517 /* Always add the current UI's input file handler, regardless of
518 terminal_state, because terminal_state is only valid for the main
520 add_file_handler (ui
->input_fd
, stdin_event_handler
, ui
);
522 if (terminal_state
== terminal_is_ours
)
525 (*current_target
.to_terminal_ours
) (¤t_target
);
526 terminal_state
= terminal_is_ours
;
532 target_terminal_ours_for_output (void)
534 if (terminal_state
!= terminal_is_inferior
)
536 (*current_target
.to_terminal_ours_for_output
) (¤t_target
);
537 terminal_state
= terminal_is_ours_for_output
;
543 target_supports_terminal_ours (void)
545 struct target_ops
*t
;
547 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
549 if (t
->to_terminal_ours
!= delegate_terminal_ours
550 && t
->to_terminal_ours
!= tdefault_terminal_ours
)
557 /* Restore the terminal to its previous state (helper for
558 make_cleanup_restore_target_terminal). */
561 cleanup_restore_target_terminal (void *arg
)
563 enum terminal_state
*previous_state
= (enum terminal_state
*) arg
;
565 switch (*previous_state
)
567 case terminal_is_ours
:
568 target_terminal_ours ();
570 case terminal_is_ours_for_output
:
571 target_terminal_ours_for_output ();
573 case terminal_is_inferior
:
574 target_terminal_inferior ();
582 make_cleanup_restore_target_terminal (void)
584 enum terminal_state
*ts
= XNEW (enum terminal_state
);
586 *ts
= terminal_state
;
588 return make_cleanup_dtor (cleanup_restore_target_terminal
, ts
, xfree
);
594 error (_("You can't do that when your target is `%s'"),
595 current_target
.to_shortname
);
601 error (_("You can't do that without a process to debug."));
605 default_terminal_info (struct target_ops
*self
, const char *args
, int from_tty
)
607 printf_unfiltered (_("No saved terminal information.\n"));
610 /* A default implementation for the to_get_ada_task_ptid target method.
612 This function builds the PTID by using both LWP and TID as part of
613 the PTID lwp and tid elements. The pid used is the pid of the
617 default_get_ada_task_ptid (struct target_ops
*self
, long lwp
, long tid
)
619 return ptid_build (ptid_get_pid (inferior_ptid
), lwp
, tid
);
622 static enum exec_direction_kind
623 default_execution_direction (struct target_ops
*self
)
625 if (!target_can_execute_reverse
)
627 else if (!target_can_async_p ())
630 gdb_assert_not_reached ("\
631 to_execution_direction must be implemented for reverse async");
634 /* Go through the target stack from top to bottom, copying over zero
635 entries in current_target, then filling in still empty entries. In
636 effect, we are doing class inheritance through the pushed target
639 NOTE: cagney/2003-10-17: The problem with this inheritance, as it
640 is currently implemented, is that it discards any knowledge of
641 which target an inherited method originally belonged to.
642 Consequently, new new target methods should instead explicitly and
643 locally search the target stack for the target that can handle the
647 update_current_target (void)
649 struct target_ops
*t
;
651 /* First, reset current's contents. */
652 memset (¤t_target
, 0, sizeof (current_target
));
654 /* Install the delegators. */
655 install_delegators (¤t_target
);
657 current_target
.to_stratum
= target_stack
->to_stratum
;
659 #define INHERIT(FIELD, TARGET) \
660 if (!current_target.FIELD) \
661 current_target.FIELD = (TARGET)->FIELD
663 /* Do not add any new INHERITs here. Instead, use the delegation
664 mechanism provided by make-target-delegates. */
665 for (t
= target_stack
; t
; t
= t
->beneath
)
667 INHERIT (to_shortname
, t
);
668 INHERIT (to_longname
, t
);
669 INHERIT (to_attach_no_wait
, t
);
670 INHERIT (to_have_steppable_watchpoint
, t
);
671 INHERIT (to_have_continuable_watchpoint
, t
);
672 INHERIT (to_has_thread_control
, t
);
676 /* Finally, position the target-stack beneath the squashed
677 "current_target". That way code looking for a non-inherited
678 target method can quickly and simply find it. */
679 current_target
.beneath
= target_stack
;
682 setup_target_debug ();
685 /* Push a new target type into the stack of the existing target accessors,
686 possibly superseding some of the existing accessors.
688 Rather than allow an empty stack, we always have the dummy target at
689 the bottom stratum, so we can call the function vectors without
693 push_target (struct target_ops
*t
)
695 struct target_ops
**cur
;
697 /* Check magic number. If wrong, it probably means someone changed
698 the struct definition, but not all the places that initialize one. */
699 if (t
->to_magic
!= OPS_MAGIC
)
701 fprintf_unfiltered (gdb_stderr
,
702 "Magic number of %s target struct wrong\n",
704 internal_error (__FILE__
, __LINE__
,
705 _("failed internal consistency check"));
708 /* Find the proper stratum to install this target in. */
709 for (cur
= &target_stack
; (*cur
) != NULL
; cur
= &(*cur
)->beneath
)
711 if ((int) (t
->to_stratum
) >= (int) (*cur
)->to_stratum
)
715 /* If there's already targets at this stratum, remove them. */
716 /* FIXME: cagney/2003-10-15: I think this should be popping all
717 targets to CUR, and not just those at this stratum level. */
718 while ((*cur
) != NULL
&& t
->to_stratum
== (*cur
)->to_stratum
)
720 /* There's already something at this stratum level. Close it,
721 and un-hook it from the stack. */
722 struct target_ops
*tmp
= (*cur
);
724 (*cur
) = (*cur
)->beneath
;
729 /* We have removed all targets in our stratum, now add the new one. */
733 update_current_target ();
736 /* Remove a target_ops vector from the stack, wherever it may be.
737 Return how many times it was removed (0 or 1). */
740 unpush_target (struct target_ops
*t
)
742 struct target_ops
**cur
;
743 struct target_ops
*tmp
;
745 if (t
->to_stratum
== dummy_stratum
)
746 internal_error (__FILE__
, __LINE__
,
747 _("Attempt to unpush the dummy target"));
749 /* Look for the specified target. Note that we assume that a target
750 can only occur once in the target stack. */
752 for (cur
= &target_stack
; (*cur
) != NULL
; cur
= &(*cur
)->beneath
)
758 /* If we don't find target_ops, quit. Only open targets should be
763 /* Unchain the target. */
765 (*cur
) = (*cur
)->beneath
;
768 update_current_target ();
770 /* Finally close the target. Note we do this after unchaining, so
771 any target method calls from within the target_close
772 implementation don't end up in T anymore. */
778 /* Unpush TARGET and assert that it worked. */
781 unpush_target_and_assert (struct target_ops
*target
)
783 if (!unpush_target (target
))
785 fprintf_unfiltered (gdb_stderr
,
786 "pop_all_targets couldn't find target %s\n",
787 target
->to_shortname
);
788 internal_error (__FILE__
, __LINE__
,
789 _("failed internal consistency check"));
794 pop_all_targets_above (enum strata above_stratum
)
796 while ((int) (current_target
.to_stratum
) > (int) above_stratum
)
797 unpush_target_and_assert (target_stack
);
803 pop_all_targets_at_and_above (enum strata stratum
)
805 while ((int) (current_target
.to_stratum
) >= (int) stratum
)
806 unpush_target_and_assert (target_stack
);
810 pop_all_targets (void)
812 pop_all_targets_above (dummy_stratum
);
815 /* Return 1 if T is now pushed in the target stack. Return 0 otherwise. */
818 target_is_pushed (struct target_ops
*t
)
820 struct target_ops
*cur
;
822 /* Check magic number. If wrong, it probably means someone changed
823 the struct definition, but not all the places that initialize one. */
824 if (t
->to_magic
!= OPS_MAGIC
)
826 fprintf_unfiltered (gdb_stderr
,
827 "Magic number of %s target struct wrong\n",
829 internal_error (__FILE__
, __LINE__
,
830 _("failed internal consistency check"));
833 for (cur
= target_stack
; cur
!= NULL
; cur
= cur
->beneath
)
840 /* Default implementation of to_get_thread_local_address. */
843 generic_tls_error (void)
845 throw_error (TLS_GENERIC_ERROR
,
846 _("Cannot find thread-local variables on this target"));
849 /* Using the objfile specified in OBJFILE, find the address for the
850 current thread's thread-local storage with offset OFFSET. */
852 target_translate_tls_address (struct objfile
*objfile
, CORE_ADDR offset
)
854 volatile CORE_ADDR addr
= 0;
855 struct target_ops
*target
= ¤t_target
;
857 if (gdbarch_fetch_tls_load_module_address_p (target_gdbarch ()))
859 ptid_t ptid
= inferior_ptid
;
865 /* Fetch the load module address for this objfile. */
866 lm_addr
= gdbarch_fetch_tls_load_module_address (target_gdbarch (),
869 addr
= target
->to_get_thread_local_address (target
, ptid
,
872 /* If an error occurred, print TLS related messages here. Otherwise,
873 throw the error to some higher catcher. */
874 CATCH (ex
, RETURN_MASK_ALL
)
876 int objfile_is_library
= (objfile
->flags
& OBJF_SHARED
);
880 case TLS_NO_LIBRARY_SUPPORT_ERROR
:
881 error (_("Cannot find thread-local variables "
882 "in this thread library."));
884 case TLS_LOAD_MODULE_NOT_FOUND_ERROR
:
885 if (objfile_is_library
)
886 error (_("Cannot find shared library `%s' in dynamic"
887 " linker's load module list"), objfile_name (objfile
));
889 error (_("Cannot find executable file `%s' in dynamic"
890 " linker's load module list"), objfile_name (objfile
));
892 case TLS_NOT_ALLOCATED_YET_ERROR
:
893 if (objfile_is_library
)
894 error (_("The inferior has not yet allocated storage for"
895 " thread-local variables in\n"
896 "the shared library `%s'\n"
898 objfile_name (objfile
), target_pid_to_str (ptid
));
900 error (_("The inferior has not yet allocated storage for"
901 " thread-local variables in\n"
902 "the executable `%s'\n"
904 objfile_name (objfile
), target_pid_to_str (ptid
));
906 case TLS_GENERIC_ERROR
:
907 if (objfile_is_library
)
908 error (_("Cannot find thread-local storage for %s, "
909 "shared library %s:\n%s"),
910 target_pid_to_str (ptid
),
911 objfile_name (objfile
), ex
.message
);
913 error (_("Cannot find thread-local storage for %s, "
914 "executable file %s:\n%s"),
915 target_pid_to_str (ptid
),
916 objfile_name (objfile
), ex
.message
);
919 throw_exception (ex
);
925 /* It wouldn't be wrong here to try a gdbarch method, too; finding
926 TLS is an ABI-specific thing. But we don't do that yet. */
928 error (_("Cannot find thread-local variables on this target"));
934 target_xfer_status_to_string (enum target_xfer_status status
)
936 #define CASE(X) case X: return #X
939 CASE(TARGET_XFER_E_IO
);
940 CASE(TARGET_XFER_UNAVAILABLE
);
949 #define MIN(A, B) (((A) <= (B)) ? (A) : (B))
951 /* target_read_string -- read a null terminated string, up to LEN bytes,
952 from MEMADDR in target. Set *ERRNOP to the errno code, or 0 if successful.
953 Set *STRING to a pointer to malloc'd memory containing the data; the caller
954 is responsible for freeing it. Return the number of bytes successfully
958 target_read_string (CORE_ADDR memaddr
, char **string
, int len
, int *errnop
)
964 int buffer_allocated
;
966 unsigned int nbytes_read
= 0;
970 /* Small for testing. */
971 buffer_allocated
= 4;
972 buffer
= (char *) xmalloc (buffer_allocated
);
977 tlen
= MIN (len
, 4 - (memaddr
& 3));
978 offset
= memaddr
& 3;
980 errcode
= target_read_memory (memaddr
& ~3, buf
, sizeof buf
);
983 /* The transfer request might have crossed the boundary to an
984 unallocated region of memory. Retry the transfer, requesting
988 errcode
= target_read_memory (memaddr
, buf
, 1);
993 if (bufptr
- buffer
+ tlen
> buffer_allocated
)
997 bytes
= bufptr
- buffer
;
998 buffer_allocated
*= 2;
999 buffer
= (char *) xrealloc (buffer
, buffer_allocated
);
1000 bufptr
= buffer
+ bytes
;
1003 for (i
= 0; i
< tlen
; i
++)
1005 *bufptr
++ = buf
[i
+ offset
];
1006 if (buf
[i
+ offset
] == '\000')
1008 nbytes_read
+= i
+ 1;
1015 nbytes_read
+= tlen
;
1024 struct target_section_table
*
1025 target_get_section_table (struct target_ops
*target
)
1027 return (*target
->to_get_section_table
) (target
);
1030 /* Find a section containing ADDR. */
1032 struct target_section
*
1033 target_section_by_addr (struct target_ops
*target
, CORE_ADDR addr
)
1035 struct target_section_table
*table
= target_get_section_table (target
);
1036 struct target_section
*secp
;
1041 for (secp
= table
->sections
; secp
< table
->sections_end
; secp
++)
1043 if (addr
>= secp
->addr
&& addr
< secp
->endaddr
)
1050 /* Helper for the memory xfer routines. Checks the attributes of the
1051 memory region of MEMADDR against the read or write being attempted.
1052 If the access is permitted returns true, otherwise returns false.
1053 REGION_P is an optional output parameter. If not-NULL, it is
1054 filled with a pointer to the memory region of MEMADDR. REG_LEN
1055 returns LEN trimmed to the end of the region. This is how much the
1056 caller can continue requesting, if the access is permitted. A
1057 single xfer request must not straddle memory region boundaries. */
1060 memory_xfer_check_region (gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1061 ULONGEST memaddr
, ULONGEST len
, ULONGEST
*reg_len
,
1062 struct mem_region
**region_p
)
1064 struct mem_region
*region
;
1066 region
= lookup_mem_region (memaddr
);
1068 if (region_p
!= NULL
)
1071 switch (region
->attrib
.mode
)
1074 if (writebuf
!= NULL
)
1079 if (readbuf
!= NULL
)
1084 /* We only support writing to flash during "load" for now. */
1085 if (writebuf
!= NULL
)
1086 error (_("Writing to flash memory forbidden in this context"));
1093 /* region->hi == 0 means there's no upper bound. */
1094 if (memaddr
+ len
< region
->hi
|| region
->hi
== 0)
1097 *reg_len
= region
->hi
- memaddr
;
1102 /* Read memory from more than one valid target. A core file, for
1103 instance, could have some of memory but delegate other bits to
1104 the target below it. So, we must manually try all targets. */
1106 enum target_xfer_status
1107 raw_memory_xfer_partial (struct target_ops
*ops
, gdb_byte
*readbuf
,
1108 const gdb_byte
*writebuf
, ULONGEST memaddr
, LONGEST len
,
1109 ULONGEST
*xfered_len
)
1111 enum target_xfer_status res
;
1115 res
= ops
->to_xfer_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1116 readbuf
, writebuf
, memaddr
, len
,
1118 if (res
== TARGET_XFER_OK
)
1121 /* Stop if the target reports that the memory is not available. */
1122 if (res
== TARGET_XFER_UNAVAILABLE
)
1125 /* We want to continue past core files to executables, but not
1126 past a running target's memory. */
1127 if (ops
->to_has_all_memory (ops
))
1132 while (ops
!= NULL
);
1134 /* The cache works at the raw memory level. Make sure the cache
1135 gets updated with raw contents no matter what kind of memory
1136 object was originally being written. Note we do write-through
1137 first, so that if it fails, we don't write to the cache contents
1138 that never made it to the target. */
1139 if (writebuf
!= NULL
1140 && !ptid_equal (inferior_ptid
, null_ptid
)
1141 && target_dcache_init_p ()
1142 && (stack_cache_enabled_p () || code_cache_enabled_p ()))
1144 DCACHE
*dcache
= target_dcache_get ();
1146 /* Note that writing to an area of memory which wasn't present
1147 in the cache doesn't cause it to be loaded in. */
1148 dcache_update (dcache
, res
, memaddr
, writebuf
, *xfered_len
);
1154 /* Perform a partial memory transfer.
1155 For docs see target.h, to_xfer_partial. */
1157 static enum target_xfer_status
1158 memory_xfer_partial_1 (struct target_ops
*ops
, enum target_object object
,
1159 gdb_byte
*readbuf
, const gdb_byte
*writebuf
, ULONGEST memaddr
,
1160 ULONGEST len
, ULONGEST
*xfered_len
)
1162 enum target_xfer_status res
;
1164 struct mem_region
*region
;
1165 struct inferior
*inf
;
1167 /* For accesses to unmapped overlay sections, read directly from
1168 files. Must do this first, as MEMADDR may need adjustment. */
1169 if (readbuf
!= NULL
&& overlay_debugging
)
1171 struct obj_section
*section
= find_pc_overlay (memaddr
);
1173 if (pc_in_unmapped_range (memaddr
, section
))
1175 struct target_section_table
*table
1176 = target_get_section_table (ops
);
1177 const char *section_name
= section
->the_bfd_section
->name
;
1179 memaddr
= overlay_mapped_address (memaddr
, section
);
1180 return section_table_xfer_memory_partial (readbuf
, writebuf
,
1181 memaddr
, len
, xfered_len
,
1183 table
->sections_end
,
1188 /* Try the executable files, if "trust-readonly-sections" is set. */
1189 if (readbuf
!= NULL
&& trust_readonly
)
1191 struct target_section
*secp
;
1192 struct target_section_table
*table
;
1194 secp
= target_section_by_addr (ops
, memaddr
);
1196 && (bfd_get_section_flags (secp
->the_bfd_section
->owner
,
1197 secp
->the_bfd_section
)
1200 table
= target_get_section_table (ops
);
1201 return section_table_xfer_memory_partial (readbuf
, writebuf
,
1202 memaddr
, len
, xfered_len
,
1204 table
->sections_end
,
1209 /* Try GDB's internal data cache. */
1211 if (!memory_xfer_check_region (readbuf
, writebuf
, memaddr
, len
, ®_len
,
1213 return TARGET_XFER_E_IO
;
1215 if (!ptid_equal (inferior_ptid
, null_ptid
))
1216 inf
= find_inferior_ptid (inferior_ptid
);
1222 /* The dcache reads whole cache lines; that doesn't play well
1223 with reading from a trace buffer, because reading outside of
1224 the collected memory range fails. */
1225 && get_traceframe_number () == -1
1226 && (region
->attrib
.cache
1227 || (stack_cache_enabled_p () && object
== TARGET_OBJECT_STACK_MEMORY
)
1228 || (code_cache_enabled_p () && object
== TARGET_OBJECT_CODE_MEMORY
)))
1230 DCACHE
*dcache
= target_dcache_get_or_init ();
1232 return dcache_read_memory_partial (ops
, dcache
, memaddr
, readbuf
,
1233 reg_len
, xfered_len
);
1236 /* If none of those methods found the memory we wanted, fall back
1237 to a target partial transfer. Normally a single call to
1238 to_xfer_partial is enough; if it doesn't recognize an object
1239 it will call the to_xfer_partial of the next target down.
1240 But for memory this won't do. Memory is the only target
1241 object which can be read from more than one valid target.
1242 A core file, for instance, could have some of memory but
1243 delegate other bits to the target below it. So, we must
1244 manually try all targets. */
1246 res
= raw_memory_xfer_partial (ops
, readbuf
, writebuf
, memaddr
, reg_len
,
1249 /* If we still haven't got anything, return the last error. We
1254 /* Perform a partial memory transfer. For docs see target.h,
1257 static enum target_xfer_status
1258 memory_xfer_partial (struct target_ops
*ops
, enum target_object object
,
1259 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1260 ULONGEST memaddr
, ULONGEST len
, ULONGEST
*xfered_len
)
1262 enum target_xfer_status res
;
1264 /* Zero length requests are ok and require no work. */
1266 return TARGET_XFER_EOF
;
1268 /* Fill in READBUF with breakpoint shadows, or WRITEBUF with
1269 breakpoint insns, thus hiding out from higher layers whether
1270 there are software breakpoints inserted in the code stream. */
1271 if (readbuf
!= NULL
)
1273 res
= memory_xfer_partial_1 (ops
, object
, readbuf
, NULL
, memaddr
, len
,
1276 if (res
== TARGET_XFER_OK
&& !show_memory_breakpoints
)
1277 breakpoint_xfer_memory (readbuf
, NULL
, NULL
, memaddr
, *xfered_len
);
1282 struct cleanup
*old_chain
;
1284 /* A large write request is likely to be partially satisfied
1285 by memory_xfer_partial_1. We will continually malloc
1286 and free a copy of the entire write request for breakpoint
1287 shadow handling even though we only end up writing a small
1288 subset of it. Cap writes to 4KB to mitigate this. */
1289 len
= min (4096, len
);
1291 buf
= (gdb_byte
*) xmalloc (len
);
1292 old_chain
= make_cleanup (xfree
, buf
);
1293 memcpy (buf
, writebuf
, len
);
1295 breakpoint_xfer_memory (NULL
, buf
, writebuf
, memaddr
, len
);
1296 res
= memory_xfer_partial_1 (ops
, object
, NULL
, buf
, memaddr
, len
,
1299 do_cleanups (old_chain
);
1306 restore_show_memory_breakpoints (void *arg
)
1308 show_memory_breakpoints
= (uintptr_t) arg
;
1312 make_show_memory_breakpoints_cleanup (int show
)
1314 int current
= show_memory_breakpoints
;
1316 show_memory_breakpoints
= show
;
1317 return make_cleanup (restore_show_memory_breakpoints
,
1318 (void *) (uintptr_t) current
);
1321 /* For docs see target.h, to_xfer_partial. */
1323 enum target_xfer_status
1324 target_xfer_partial (struct target_ops
*ops
,
1325 enum target_object object
, const char *annex
,
1326 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1327 ULONGEST offset
, ULONGEST len
,
1328 ULONGEST
*xfered_len
)
1330 enum target_xfer_status retval
;
1332 gdb_assert (ops
->to_xfer_partial
!= NULL
);
1334 /* Transfer is done when LEN is zero. */
1336 return TARGET_XFER_EOF
;
1338 if (writebuf
&& !may_write_memory
)
1339 error (_("Writing to memory is not allowed (addr %s, len %s)"),
1340 core_addr_to_string_nz (offset
), plongest (len
));
1344 /* If this is a memory transfer, let the memory-specific code
1345 have a look at it instead. Memory transfers are more
1347 if (object
== TARGET_OBJECT_MEMORY
|| object
== TARGET_OBJECT_STACK_MEMORY
1348 || object
== TARGET_OBJECT_CODE_MEMORY
)
1349 retval
= memory_xfer_partial (ops
, object
, readbuf
,
1350 writebuf
, offset
, len
, xfered_len
);
1351 else if (object
== TARGET_OBJECT_RAW_MEMORY
)
1353 /* Skip/avoid accessing the target if the memory region
1354 attributes block the access. Check this here instead of in
1355 raw_memory_xfer_partial as otherwise we'd end up checking
1356 this twice in the case of the memory_xfer_partial path is
1357 taken; once before checking the dcache, and another in the
1358 tail call to raw_memory_xfer_partial. */
1359 if (!memory_xfer_check_region (readbuf
, writebuf
, offset
, len
, &len
,
1361 return TARGET_XFER_E_IO
;
1363 /* Request the normal memory object from other layers. */
1364 retval
= raw_memory_xfer_partial (ops
, readbuf
, writebuf
, offset
, len
,
1368 retval
= ops
->to_xfer_partial (ops
, object
, annex
, readbuf
,
1369 writebuf
, offset
, len
, xfered_len
);
1373 const unsigned char *myaddr
= NULL
;
1375 fprintf_unfiltered (gdb_stdlog
,
1376 "%s:target_xfer_partial "
1377 "(%d, %s, %s, %s, %s, %s) = %d, %s",
1380 (annex
? annex
: "(null)"),
1381 host_address_to_string (readbuf
),
1382 host_address_to_string (writebuf
),
1383 core_addr_to_string_nz (offset
),
1384 pulongest (len
), retval
,
1385 pulongest (*xfered_len
));
1391 if (retval
== TARGET_XFER_OK
&& myaddr
!= NULL
)
1395 fputs_unfiltered (", bytes =", gdb_stdlog
);
1396 for (i
= 0; i
< *xfered_len
; i
++)
1398 if ((((intptr_t) &(myaddr
[i
])) & 0xf) == 0)
1400 if (targetdebug
< 2 && i
> 0)
1402 fprintf_unfiltered (gdb_stdlog
, " ...");
1405 fprintf_unfiltered (gdb_stdlog
, "\n");
1408 fprintf_unfiltered (gdb_stdlog
, " %02x", myaddr
[i
] & 0xff);
1412 fputc_unfiltered ('\n', gdb_stdlog
);
1415 /* Check implementations of to_xfer_partial update *XFERED_LEN
1416 properly. Do assertion after printing debug messages, so that we
1417 can find more clues on assertion failure from debugging messages. */
1418 if (retval
== TARGET_XFER_OK
|| retval
== TARGET_XFER_UNAVAILABLE
)
1419 gdb_assert (*xfered_len
> 0);
1424 /* Read LEN bytes of target memory at address MEMADDR, placing the
1425 results in GDB's memory at MYADDR. Returns either 0 for success or
1426 -1 if any error occurs.
1428 If an error occurs, no guarantee is made about the contents of the data at
1429 MYADDR. In particular, the caller should not depend upon partial reads
1430 filling the buffer with good data. There is no way for the caller to know
1431 how much good data might have been transfered anyway. Callers that can
1432 deal with partial reads should call target_read (which will retry until
1433 it makes no progress, and then return how much was transferred). */
1436 target_read_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1438 /* Dispatch to the topmost target, not the flattened current_target.
1439 Memory accesses check target->to_has_(all_)memory, and the
1440 flattened target doesn't inherit those. */
1441 if (target_read (current_target
.beneath
, TARGET_OBJECT_MEMORY
, NULL
,
1442 myaddr
, memaddr
, len
) == len
)
1448 /* See target/target.h. */
1451 target_read_uint32 (CORE_ADDR memaddr
, uint32_t *result
)
1456 r
= target_read_memory (memaddr
, buf
, sizeof buf
);
1459 *result
= extract_unsigned_integer (buf
, sizeof buf
,
1460 gdbarch_byte_order (target_gdbarch ()));
1464 /* Like target_read_memory, but specify explicitly that this is a read
1465 from the target's raw memory. That is, this read bypasses the
1466 dcache, breakpoint shadowing, etc. */
1469 target_read_raw_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1471 /* See comment in target_read_memory about why the request starts at
1472 current_target.beneath. */
1473 if (target_read (current_target
.beneath
, TARGET_OBJECT_RAW_MEMORY
, NULL
,
1474 myaddr
, memaddr
, len
) == len
)
1480 /* Like target_read_memory, but specify explicitly that this is a read from
1481 the target's stack. This may trigger different cache behavior. */
1484 target_read_stack (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1486 /* See comment in target_read_memory about why the request starts at
1487 current_target.beneath. */
1488 if (target_read (current_target
.beneath
, TARGET_OBJECT_STACK_MEMORY
, NULL
,
1489 myaddr
, memaddr
, len
) == len
)
1495 /* Like target_read_memory, but specify explicitly that this is a read from
1496 the target's code. This may trigger different cache behavior. */
1499 target_read_code (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1501 /* See comment in target_read_memory about why the request starts at
1502 current_target.beneath. */
1503 if (target_read (current_target
.beneath
, TARGET_OBJECT_CODE_MEMORY
, NULL
,
1504 myaddr
, memaddr
, len
) == len
)
1510 /* Write LEN bytes from MYADDR to target memory at address MEMADDR.
1511 Returns either 0 for success or -1 if any error occurs. If an
1512 error occurs, no guarantee is made about how much data got written.
1513 Callers that can deal with partial writes should call
1517 target_write_memory (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ssize_t len
)
1519 /* See comment in target_read_memory about why the request starts at
1520 current_target.beneath. */
1521 if (target_write (current_target
.beneath
, TARGET_OBJECT_MEMORY
, NULL
,
1522 myaddr
, memaddr
, len
) == len
)
1528 /* Write LEN bytes from MYADDR to target raw memory at address
1529 MEMADDR. Returns either 0 for success or -1 if any error occurs.
1530 If an error occurs, no guarantee is made about how much data got
1531 written. Callers that can deal with partial writes should call
1535 target_write_raw_memory (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ssize_t len
)
1537 /* See comment in target_read_memory about why the request starts at
1538 current_target.beneath. */
1539 if (target_write (current_target
.beneath
, TARGET_OBJECT_RAW_MEMORY
, NULL
,
1540 myaddr
, memaddr
, len
) == len
)
1546 /* Fetch the target's memory map. */
1549 target_memory_map (void)
1551 VEC(mem_region_s
) *result
;
1552 struct mem_region
*last_one
, *this_one
;
1554 result
= current_target
.to_memory_map (¤t_target
);
1558 qsort (VEC_address (mem_region_s
, result
),
1559 VEC_length (mem_region_s
, result
),
1560 sizeof (struct mem_region
), mem_region_cmp
);
1562 /* Check that regions do not overlap. Simultaneously assign
1563 a numbering for the "mem" commands to use to refer to
1566 for (ix
= 0; VEC_iterate (mem_region_s
, result
, ix
, this_one
); ix
++)
1568 this_one
->number
= ix
;
1570 if (last_one
&& last_one
->hi
> this_one
->lo
)
1572 warning (_("Overlapping regions in memory map: ignoring"));
1573 VEC_free (mem_region_s
, result
);
1576 last_one
= this_one
;
1583 target_flash_erase (ULONGEST address
, LONGEST length
)
1585 current_target
.to_flash_erase (¤t_target
, address
, length
);
1589 target_flash_done (void)
1591 current_target
.to_flash_done (¤t_target
);
1595 show_trust_readonly (struct ui_file
*file
, int from_tty
,
1596 struct cmd_list_element
*c
, const char *value
)
1598 fprintf_filtered (file
,
1599 _("Mode for reading from readonly sections is %s.\n"),
1603 /* Target vector read/write partial wrapper functions. */
1605 static enum target_xfer_status
1606 target_read_partial (struct target_ops
*ops
,
1607 enum target_object object
,
1608 const char *annex
, gdb_byte
*buf
,
1609 ULONGEST offset
, ULONGEST len
,
1610 ULONGEST
*xfered_len
)
1612 return target_xfer_partial (ops
, object
, annex
, buf
, NULL
, offset
, len
,
1616 static enum target_xfer_status
1617 target_write_partial (struct target_ops
*ops
,
1618 enum target_object object
,
1619 const char *annex
, const gdb_byte
*buf
,
1620 ULONGEST offset
, LONGEST len
, ULONGEST
*xfered_len
)
1622 return target_xfer_partial (ops
, object
, annex
, NULL
, buf
, offset
, len
,
1626 /* Wrappers to perform the full transfer. */
1628 /* For docs on target_read see target.h. */
1631 target_read (struct target_ops
*ops
,
1632 enum target_object object
,
1633 const char *annex
, gdb_byte
*buf
,
1634 ULONGEST offset
, LONGEST len
)
1636 LONGEST xfered_total
= 0;
1639 /* If we are reading from a memory object, find the length of an addressable
1640 unit for that architecture. */
1641 if (object
== TARGET_OBJECT_MEMORY
1642 || object
== TARGET_OBJECT_STACK_MEMORY
1643 || object
== TARGET_OBJECT_CODE_MEMORY
1644 || object
== TARGET_OBJECT_RAW_MEMORY
)
1645 unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
1647 while (xfered_total
< len
)
1649 ULONGEST xfered_partial
;
1650 enum target_xfer_status status
;
1652 status
= target_read_partial (ops
, object
, annex
,
1653 buf
+ xfered_total
* unit_size
,
1654 offset
+ xfered_total
, len
- xfered_total
,
1657 /* Call an observer, notifying them of the xfer progress? */
1658 if (status
== TARGET_XFER_EOF
)
1659 return xfered_total
;
1660 else if (status
== TARGET_XFER_OK
)
1662 xfered_total
+= xfered_partial
;
1666 return TARGET_XFER_E_IO
;
1672 /* Assuming that the entire [begin, end) range of memory cannot be
1673 read, try to read whatever subrange is possible to read.
1675 The function returns, in RESULT, either zero or one memory block.
1676 If there's a readable subrange at the beginning, it is completely
1677 read and returned. Any further readable subrange will not be read.
1678 Otherwise, if there's a readable subrange at the end, it will be
1679 completely read and returned. Any readable subranges before it
1680 (obviously, not starting at the beginning), will be ignored. In
1681 other cases -- either no readable subrange, or readable subrange(s)
1682 that is neither at the beginning, or end, nothing is returned.
1684 The purpose of this function is to handle a read across a boundary
1685 of accessible memory in a case when memory map is not available.
1686 The above restrictions are fine for this case, but will give
1687 incorrect results if the memory is 'patchy'. However, supporting
1688 'patchy' memory would require trying to read every single byte,
1689 and it seems unacceptable solution. Explicit memory map is
1690 recommended for this case -- and target_read_memory_robust will
1691 take care of reading multiple ranges then. */
1694 read_whatever_is_readable (struct target_ops
*ops
,
1695 const ULONGEST begin
, const ULONGEST end
,
1697 VEC(memory_read_result_s
) **result
)
1699 gdb_byte
*buf
= (gdb_byte
*) xmalloc (end
- begin
);
1700 ULONGEST current_begin
= begin
;
1701 ULONGEST current_end
= end
;
1703 memory_read_result_s r
;
1704 ULONGEST xfered_len
;
1706 /* If we previously failed to read 1 byte, nothing can be done here. */
1707 if (end
- begin
<= 1)
1713 /* Check that either first or the last byte is readable, and give up
1714 if not. This heuristic is meant to permit reading accessible memory
1715 at the boundary of accessible region. */
1716 if (target_read_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1717 buf
, begin
, 1, &xfered_len
) == TARGET_XFER_OK
)
1722 else if (target_read_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1723 buf
+ (end
- begin
) - 1, end
- 1, 1,
1724 &xfered_len
) == TARGET_XFER_OK
)
1735 /* Loop invariant is that the [current_begin, current_end) was previously
1736 found to be not readable as a whole.
1738 Note loop condition -- if the range has 1 byte, we can't divide the range
1739 so there's no point trying further. */
1740 while (current_end
- current_begin
> 1)
1742 ULONGEST first_half_begin
, first_half_end
;
1743 ULONGEST second_half_begin
, second_half_end
;
1745 ULONGEST middle
= current_begin
+ (current_end
- current_begin
) / 2;
1749 first_half_begin
= current_begin
;
1750 first_half_end
= middle
;
1751 second_half_begin
= middle
;
1752 second_half_end
= current_end
;
1756 first_half_begin
= middle
;
1757 first_half_end
= current_end
;
1758 second_half_begin
= current_begin
;
1759 second_half_end
= middle
;
1762 xfer
= target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1763 buf
+ (first_half_begin
- begin
) * unit_size
,
1765 first_half_end
- first_half_begin
);
1767 if (xfer
== first_half_end
- first_half_begin
)
1769 /* This half reads up fine. So, the error must be in the
1771 current_begin
= second_half_begin
;
1772 current_end
= second_half_end
;
1776 /* This half is not readable. Because we've tried one byte, we
1777 know some part of this half if actually readable. Go to the next
1778 iteration to divide again and try to read.
1780 We don't handle the other half, because this function only tries
1781 to read a single readable subrange. */
1782 current_begin
= first_half_begin
;
1783 current_end
= first_half_end
;
1789 /* The [begin, current_begin) range has been read. */
1791 r
.end
= current_begin
;
1796 /* The [current_end, end) range has been read. */
1797 LONGEST region_len
= end
- current_end
;
1799 r
.data
= (gdb_byte
*) xmalloc (region_len
* unit_size
);
1800 memcpy (r
.data
, buf
+ (current_end
- begin
) * unit_size
,
1801 region_len
* unit_size
);
1802 r
.begin
= current_end
;
1806 VEC_safe_push(memory_read_result_s
, (*result
), &r
);
1810 free_memory_read_result_vector (void *x
)
1812 VEC(memory_read_result_s
) *v
= (VEC(memory_read_result_s
) *) x
;
1813 memory_read_result_s
*current
;
1816 for (ix
= 0; VEC_iterate (memory_read_result_s
, v
, ix
, current
); ++ix
)
1818 xfree (current
->data
);
1820 VEC_free (memory_read_result_s
, v
);
1823 VEC(memory_read_result_s
) *
1824 read_memory_robust (struct target_ops
*ops
,
1825 const ULONGEST offset
, const LONGEST len
)
1827 VEC(memory_read_result_s
) *result
= 0;
1828 int unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
1830 LONGEST xfered_total
= 0;
1831 while (xfered_total
< len
)
1833 struct mem_region
*region
= lookup_mem_region (offset
+ xfered_total
);
1836 /* If there is no explicit region, a fake one should be created. */
1837 gdb_assert (region
);
1839 if (region
->hi
== 0)
1840 region_len
= len
- xfered_total
;
1842 region_len
= region
->hi
- offset
;
1844 if (region
->attrib
.mode
== MEM_NONE
|| region
->attrib
.mode
== MEM_WO
)
1846 /* Cannot read this region. Note that we can end up here only
1847 if the region is explicitly marked inaccessible, or
1848 'inaccessible-by-default' is in effect. */
1849 xfered_total
+= region_len
;
1853 LONGEST to_read
= min (len
- xfered_total
, region_len
);
1854 gdb_byte
*buffer
= (gdb_byte
*) xmalloc (to_read
* unit_size
);
1856 LONGEST xfered_partial
=
1857 target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1858 (gdb_byte
*) buffer
,
1859 offset
+ xfered_total
, to_read
);
1860 /* Call an observer, notifying them of the xfer progress? */
1861 if (xfered_partial
<= 0)
1863 /* Got an error reading full chunk. See if maybe we can read
1866 read_whatever_is_readable (ops
, offset
+ xfered_total
,
1867 offset
+ xfered_total
+ to_read
,
1868 unit_size
, &result
);
1869 xfered_total
+= to_read
;
1873 struct memory_read_result r
;
1875 r
.begin
= offset
+ xfered_total
;
1876 r
.end
= r
.begin
+ xfered_partial
;
1877 VEC_safe_push (memory_read_result_s
, result
, &r
);
1878 xfered_total
+= xfered_partial
;
1887 /* An alternative to target_write with progress callbacks. */
1890 target_write_with_progress (struct target_ops
*ops
,
1891 enum target_object object
,
1892 const char *annex
, const gdb_byte
*buf
,
1893 ULONGEST offset
, LONGEST len
,
1894 void (*progress
) (ULONGEST
, void *), void *baton
)
1896 LONGEST xfered_total
= 0;
1899 /* If we are writing to a memory object, find the length of an addressable
1900 unit for that architecture. */
1901 if (object
== TARGET_OBJECT_MEMORY
1902 || object
== TARGET_OBJECT_STACK_MEMORY
1903 || object
== TARGET_OBJECT_CODE_MEMORY
1904 || object
== TARGET_OBJECT_RAW_MEMORY
)
1905 unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
1907 /* Give the progress callback a chance to set up. */
1909 (*progress
) (0, baton
);
1911 while (xfered_total
< len
)
1913 ULONGEST xfered_partial
;
1914 enum target_xfer_status status
;
1916 status
= target_write_partial (ops
, object
, annex
,
1917 buf
+ xfered_total
* unit_size
,
1918 offset
+ xfered_total
, len
- xfered_total
,
1921 if (status
!= TARGET_XFER_OK
)
1922 return status
== TARGET_XFER_EOF
? xfered_total
: TARGET_XFER_E_IO
;
1925 (*progress
) (xfered_partial
, baton
);
1927 xfered_total
+= xfered_partial
;
1933 /* For docs on target_write see target.h. */
1936 target_write (struct target_ops
*ops
,
1937 enum target_object object
,
1938 const char *annex
, const gdb_byte
*buf
,
1939 ULONGEST offset
, LONGEST len
)
1941 return target_write_with_progress (ops
, object
, annex
, buf
, offset
, len
,
1945 /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return
1946 the size of the transferred data. PADDING additional bytes are
1947 available in *BUF_P. This is a helper function for
1948 target_read_alloc; see the declaration of that function for more
1952 target_read_alloc_1 (struct target_ops
*ops
, enum target_object object
,
1953 const char *annex
, gdb_byte
**buf_p
, int padding
)
1955 size_t buf_alloc
, buf_pos
;
1958 /* This function does not have a length parameter; it reads the
1959 entire OBJECT). Also, it doesn't support objects fetched partly
1960 from one target and partly from another (in a different stratum,
1961 e.g. a core file and an executable). Both reasons make it
1962 unsuitable for reading memory. */
1963 gdb_assert (object
!= TARGET_OBJECT_MEMORY
);
1965 /* Start by reading up to 4K at a time. The target will throttle
1966 this number down if necessary. */
1968 buf
= (gdb_byte
*) xmalloc (buf_alloc
);
1972 ULONGEST xfered_len
;
1973 enum target_xfer_status status
;
1975 status
= target_read_partial (ops
, object
, annex
, &buf
[buf_pos
],
1976 buf_pos
, buf_alloc
- buf_pos
- padding
,
1979 if (status
== TARGET_XFER_EOF
)
1981 /* Read all there was. */
1988 else if (status
!= TARGET_XFER_OK
)
1990 /* An error occurred. */
1992 return TARGET_XFER_E_IO
;
1995 buf_pos
+= xfered_len
;
1997 /* If the buffer is filling up, expand it. */
1998 if (buf_alloc
< buf_pos
* 2)
2001 buf
= (gdb_byte
*) xrealloc (buf
, buf_alloc
);
2008 /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return
2009 the size of the transferred data. See the declaration in "target.h"
2010 function for more information about the return value. */
2013 target_read_alloc (struct target_ops
*ops
, enum target_object object
,
2014 const char *annex
, gdb_byte
**buf_p
)
2016 return target_read_alloc_1 (ops
, object
, annex
, buf_p
, 0);
2019 /* Read OBJECT/ANNEX using OPS. The result is NUL-terminated and
2020 returned as a string, allocated using xmalloc. If an error occurs
2021 or the transfer is unsupported, NULL is returned. Empty objects
2022 are returned as allocated but empty strings. A warning is issued
2023 if the result contains any embedded NUL bytes. */
2026 target_read_stralloc (struct target_ops
*ops
, enum target_object object
,
2031 LONGEST i
, transferred
;
2033 transferred
= target_read_alloc_1 (ops
, object
, annex
, &buffer
, 1);
2034 bufstr
= (char *) buffer
;
2036 if (transferred
< 0)
2039 if (transferred
== 0)
2040 return xstrdup ("");
2042 bufstr
[transferred
] = 0;
2044 /* Check for embedded NUL bytes; but allow trailing NULs. */
2045 for (i
= strlen (bufstr
); i
< transferred
; i
++)
2048 warning (_("target object %d, annex %s, "
2049 "contained unexpected null characters"),
2050 (int) object
, annex
? annex
: "(none)");
2057 /* Memory transfer methods. */
2060 get_target_memory (struct target_ops
*ops
, CORE_ADDR addr
, gdb_byte
*buf
,
2063 /* This method is used to read from an alternate, non-current
2064 target. This read must bypass the overlay support (as symbols
2065 don't match this target), and GDB's internal cache (wrong cache
2066 for this target). */
2067 if (target_read (ops
, TARGET_OBJECT_RAW_MEMORY
, NULL
, buf
, addr
, len
)
2069 memory_error (TARGET_XFER_E_IO
, addr
);
2073 get_target_memory_unsigned (struct target_ops
*ops
, CORE_ADDR addr
,
2074 int len
, enum bfd_endian byte_order
)
2076 gdb_byte buf
[sizeof (ULONGEST
)];
2078 gdb_assert (len
<= sizeof (buf
));
2079 get_target_memory (ops
, addr
, buf
, len
);
2080 return extract_unsigned_integer (buf
, len
, byte_order
);
2086 target_insert_breakpoint (struct gdbarch
*gdbarch
,
2087 struct bp_target_info
*bp_tgt
)
2089 if (!may_insert_breakpoints
)
2091 warning (_("May not insert breakpoints"));
2095 return current_target
.to_insert_breakpoint (¤t_target
,
2102 target_remove_breakpoint (struct gdbarch
*gdbarch
,
2103 struct bp_target_info
*bp_tgt
)
2105 /* This is kind of a weird case to handle, but the permission might
2106 have been changed after breakpoints were inserted - in which case
2107 we should just take the user literally and assume that any
2108 breakpoints should be left in place. */
2109 if (!may_insert_breakpoints
)
2111 warning (_("May not remove breakpoints"));
2115 return current_target
.to_remove_breakpoint (¤t_target
,
2120 target_info (char *args
, int from_tty
)
2122 struct target_ops
*t
;
2123 int has_all_mem
= 0;
2125 if (symfile_objfile
!= NULL
)
2126 printf_unfiltered (_("Symbols from \"%s\".\n"),
2127 objfile_name (symfile_objfile
));
2129 for (t
= target_stack
; t
!= NULL
; t
= t
->beneath
)
2131 if (!(*t
->to_has_memory
) (t
))
2134 if ((int) (t
->to_stratum
) <= (int) dummy_stratum
)
2137 printf_unfiltered (_("\tWhile running this, "
2138 "GDB does not access memory from...\n"));
2139 printf_unfiltered ("%s:\n", t
->to_longname
);
2140 (t
->to_files_info
) (t
);
2141 has_all_mem
= (*t
->to_has_all_memory
) (t
);
2145 /* This function is called before any new inferior is created, e.g.
2146 by running a program, attaching, or connecting to a target.
2147 It cleans up any state from previous invocations which might
2148 change between runs. This is a subset of what target_preopen
2149 resets (things which might change between targets). */
2152 target_pre_inferior (int from_tty
)
2154 /* Clear out solib state. Otherwise the solib state of the previous
2155 inferior might have survived and is entirely wrong for the new
2156 target. This has been observed on GNU/Linux using glibc 2.3. How
2168 Cannot access memory at address 0xdeadbeef
2171 /* In some OSs, the shared library list is the same/global/shared
2172 across inferiors. If code is shared between processes, so are
2173 memory regions and features. */
2174 if (!gdbarch_has_global_solist (target_gdbarch ()))
2176 no_shared_libraries (NULL
, from_tty
);
2178 invalidate_target_mem_regions ();
2180 target_clear_description ();
2183 /* attach_flag may be set if the previous process associated with
2184 the inferior was attached to. */
2185 current_inferior ()->attach_flag
= 0;
2187 current_inferior ()->highest_thread_num
= 0;
2189 agent_capability_invalidate ();
2192 /* Callback for iterate_over_inferiors. Gets rid of the given
2196 dispose_inferior (struct inferior
*inf
, void *args
)
2198 struct thread_info
*thread
;
2200 thread
= any_thread_of_process (inf
->pid
);
2203 switch_to_thread (thread
->ptid
);
2205 /* Core inferiors actually should be detached, not killed. */
2206 if (target_has_execution
)
2209 target_detach (NULL
, 0);
2215 /* This is to be called by the open routine before it does
2219 target_preopen (int from_tty
)
2223 if (have_inferiors ())
2226 || !have_live_inferiors ()
2227 || query (_("A program is being debugged already. Kill it? ")))
2228 iterate_over_inferiors (dispose_inferior
, NULL
);
2230 error (_("Program not killed."));
2233 /* Calling target_kill may remove the target from the stack. But if
2234 it doesn't (which seems like a win for UDI), remove it now. */
2235 /* Leave the exec target, though. The user may be switching from a
2236 live process to a core of the same program. */
2237 pop_all_targets_above (file_stratum
);
2239 target_pre_inferior (from_tty
);
2242 /* Detach a target after doing deferred register stores. */
2245 target_detach (const char *args
, int from_tty
)
2247 if (gdbarch_has_global_breakpoints (target_gdbarch ()))
2248 /* Don't remove global breakpoints here. They're removed on
2249 disconnection from the target. */
2252 /* If we're in breakpoints-always-inserted mode, have to remove
2253 them before detaching. */
2254 remove_breakpoints_pid (ptid_get_pid (inferior_ptid
));
2256 prepare_for_detach ();
2258 current_target
.to_detach (¤t_target
, args
, from_tty
);
2262 target_disconnect (const char *args
, int from_tty
)
2264 /* If we're in breakpoints-always-inserted mode or if breakpoints
2265 are global across processes, we have to remove them before
2267 remove_breakpoints ();
2269 current_target
.to_disconnect (¤t_target
, args
, from_tty
);
2273 target_wait (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
2275 return (current_target
.to_wait
) (¤t_target
, ptid
, status
, options
);
2281 default_target_wait (struct target_ops
*ops
,
2282 ptid_t ptid
, struct target_waitstatus
*status
,
2285 status
->kind
= TARGET_WAITKIND_IGNORE
;
2286 return minus_one_ptid
;
2290 target_pid_to_str (ptid_t ptid
)
2292 return (*current_target
.to_pid_to_str
) (¤t_target
, ptid
);
2296 target_thread_name (struct thread_info
*info
)
2298 return current_target
.to_thread_name (¤t_target
, info
);
2302 target_resume (ptid_t ptid
, int step
, enum gdb_signal signal
)
2304 target_dcache_invalidate ();
2306 current_target
.to_resume (¤t_target
, ptid
, step
, signal
);
2308 registers_changed_ptid (ptid
);
2309 /* We only set the internal executing state here. The user/frontend
2310 running state is set at a higher level. */
2311 set_executing (ptid
, 1);
2312 clear_inline_frame_state (ptid
);
2316 target_pass_signals (int numsigs
, unsigned char *pass_signals
)
2318 (*current_target
.to_pass_signals
) (¤t_target
, numsigs
, pass_signals
);
2322 target_program_signals (int numsigs
, unsigned char *program_signals
)
2324 (*current_target
.to_program_signals
) (¤t_target
,
2325 numsigs
, program_signals
);
2329 default_follow_fork (struct target_ops
*self
, int follow_child
,
2332 /* Some target returned a fork event, but did not know how to follow it. */
2333 internal_error (__FILE__
, __LINE__
,
2334 _("could not find a target to follow fork"));
2337 /* Look through the list of possible targets for a target that can
2341 target_follow_fork (int follow_child
, int detach_fork
)
2343 return current_target
.to_follow_fork (¤t_target
,
2344 follow_child
, detach_fork
);
2347 /* Target wrapper for follow exec hook. */
2350 target_follow_exec (struct inferior
*inf
, char *execd_pathname
)
2352 current_target
.to_follow_exec (¤t_target
, inf
, execd_pathname
);
2356 default_mourn_inferior (struct target_ops
*self
)
2358 internal_error (__FILE__
, __LINE__
,
2359 _("could not find a target to follow mourn inferior"));
2363 target_mourn_inferior (void)
2365 current_target
.to_mourn_inferior (¤t_target
);
2367 /* We no longer need to keep handles on any of the object files.
2368 Make sure to release them to avoid unnecessarily locking any
2369 of them while we're not actually debugging. */
2370 bfd_cache_close_all ();
2373 /* Look for a target which can describe architectural features, starting
2374 from TARGET. If we find one, return its description. */
2376 const struct target_desc
*
2377 target_read_description (struct target_ops
*target
)
2379 return target
->to_read_description (target
);
2382 /* This implements a basic search of memory, reading target memory and
2383 performing the search here (as opposed to performing the search in on the
2384 target side with, for example, gdbserver). */
2387 simple_search_memory (struct target_ops
*ops
,
2388 CORE_ADDR start_addr
, ULONGEST search_space_len
,
2389 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2390 CORE_ADDR
*found_addrp
)
2392 /* NOTE: also defined in find.c testcase. */
2393 #define SEARCH_CHUNK_SIZE 16000
2394 const unsigned chunk_size
= SEARCH_CHUNK_SIZE
;
2395 /* Buffer to hold memory contents for searching. */
2396 gdb_byte
*search_buf
;
2397 unsigned search_buf_size
;
2398 struct cleanup
*old_cleanups
;
2400 search_buf_size
= chunk_size
+ pattern_len
- 1;
2402 /* No point in trying to allocate a buffer larger than the search space. */
2403 if (search_space_len
< search_buf_size
)
2404 search_buf_size
= search_space_len
;
2406 search_buf
= (gdb_byte
*) malloc (search_buf_size
);
2407 if (search_buf
== NULL
)
2408 error (_("Unable to allocate memory to perform the search."));
2409 old_cleanups
= make_cleanup (free_current_contents
, &search_buf
);
2411 /* Prime the search buffer. */
2413 if (target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2414 search_buf
, start_addr
, search_buf_size
) != search_buf_size
)
2416 warning (_("Unable to access %s bytes of target "
2417 "memory at %s, halting search."),
2418 pulongest (search_buf_size
), hex_string (start_addr
));
2419 do_cleanups (old_cleanups
);
2423 /* Perform the search.
2425 The loop is kept simple by allocating [N + pattern-length - 1] bytes.
2426 When we've scanned N bytes we copy the trailing bytes to the start and
2427 read in another N bytes. */
2429 while (search_space_len
>= pattern_len
)
2431 gdb_byte
*found_ptr
;
2432 unsigned nr_search_bytes
= min (search_space_len
, search_buf_size
);
2434 found_ptr
= (gdb_byte
*) memmem (search_buf
, nr_search_bytes
,
2435 pattern
, pattern_len
);
2437 if (found_ptr
!= NULL
)
2439 CORE_ADDR found_addr
= start_addr
+ (found_ptr
- search_buf
);
2441 *found_addrp
= found_addr
;
2442 do_cleanups (old_cleanups
);
2446 /* Not found in this chunk, skip to next chunk. */
2448 /* Don't let search_space_len wrap here, it's unsigned. */
2449 if (search_space_len
>= chunk_size
)
2450 search_space_len
-= chunk_size
;
2452 search_space_len
= 0;
2454 if (search_space_len
>= pattern_len
)
2456 unsigned keep_len
= search_buf_size
- chunk_size
;
2457 CORE_ADDR read_addr
= start_addr
+ chunk_size
+ keep_len
;
2460 /* Copy the trailing part of the previous iteration to the front
2461 of the buffer for the next iteration. */
2462 gdb_assert (keep_len
== pattern_len
- 1);
2463 memcpy (search_buf
, search_buf
+ chunk_size
, keep_len
);
2465 nr_to_read
= min (search_space_len
- keep_len
, chunk_size
);
2467 if (target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2468 search_buf
+ keep_len
, read_addr
,
2469 nr_to_read
) != nr_to_read
)
2471 warning (_("Unable to access %s bytes of target "
2472 "memory at %s, halting search."),
2473 plongest (nr_to_read
),
2474 hex_string (read_addr
));
2475 do_cleanups (old_cleanups
);
2479 start_addr
+= chunk_size
;
2485 do_cleanups (old_cleanups
);
2489 /* Default implementation of memory-searching. */
2492 default_search_memory (struct target_ops
*self
,
2493 CORE_ADDR start_addr
, ULONGEST search_space_len
,
2494 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2495 CORE_ADDR
*found_addrp
)
2497 /* Start over from the top of the target stack. */
2498 return simple_search_memory (current_target
.beneath
,
2499 start_addr
, search_space_len
,
2500 pattern
, pattern_len
, found_addrp
);
2503 /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the
2504 sequence of bytes in PATTERN with length PATTERN_LEN.
2506 The result is 1 if found, 0 if not found, and -1 if there was an error
2507 requiring halting of the search (e.g. memory read error).
2508 If the pattern is found the address is recorded in FOUND_ADDRP. */
2511 target_search_memory (CORE_ADDR start_addr
, ULONGEST search_space_len
,
2512 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2513 CORE_ADDR
*found_addrp
)
2515 return current_target
.to_search_memory (¤t_target
, start_addr
,
2517 pattern
, pattern_len
, found_addrp
);
2520 /* Look through the currently pushed targets. If none of them will
2521 be able to restart the currently running process, issue an error
2525 target_require_runnable (void)
2527 struct target_ops
*t
;
2529 for (t
= target_stack
; t
!= NULL
; t
= t
->beneath
)
2531 /* If this target knows how to create a new program, then
2532 assume we will still be able to after killing the current
2533 one. Either killing and mourning will not pop T, or else
2534 find_default_run_target will find it again. */
2535 if (t
->to_create_inferior
!= NULL
)
2538 /* Do not worry about targets at certain strata that can not
2539 create inferiors. Assume they will be pushed again if
2540 necessary, and continue to the process_stratum. */
2541 if (t
->to_stratum
== thread_stratum
2542 || t
->to_stratum
== record_stratum
2543 || t
->to_stratum
== arch_stratum
)
2546 error (_("The \"%s\" target does not support \"run\". "
2547 "Try \"help target\" or \"continue\"."),
2551 /* This function is only called if the target is running. In that
2552 case there should have been a process_stratum target and it
2553 should either know how to create inferiors, or not... */
2554 internal_error (__FILE__
, __LINE__
, _("No targets found"));
2557 /* Whether GDB is allowed to fall back to the default run target for
2558 "run", "attach", etc. when no target is connected yet. */
2559 static int auto_connect_native_target
= 1;
2562 show_auto_connect_native_target (struct ui_file
*file
, int from_tty
,
2563 struct cmd_list_element
*c
, const char *value
)
2565 fprintf_filtered (file
,
2566 _("Whether GDB may automatically connect to the "
2567 "native target is %s.\n"),
2571 /* Look through the list of possible targets for a target that can
2572 execute a run or attach command without any other data. This is
2573 used to locate the default process stratum.
2575 If DO_MESG is not NULL, the result is always valid (error() is
2576 called for errors); else, return NULL on error. */
2578 static struct target_ops
*
2579 find_default_run_target (char *do_mesg
)
2581 struct target_ops
*runable
= NULL
;
2583 if (auto_connect_native_target
)
2585 struct target_ops
*t
;
2589 for (i
= 0; VEC_iterate (target_ops_p
, target_structs
, i
, t
); ++i
)
2591 if (t
->to_can_run
!= delegate_can_run
&& target_can_run (t
))
2602 if (runable
== NULL
)
2605 error (_("Don't know how to %s. Try \"help target\"."), do_mesg
);
2616 find_attach_target (void)
2618 struct target_ops
*t
;
2620 /* If a target on the current stack can attach, use it. */
2621 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2623 if (t
->to_attach
!= NULL
)
2627 /* Otherwise, use the default run target for attaching. */
2629 t
= find_default_run_target ("attach");
2637 find_run_target (void)
2639 struct target_ops
*t
;
2641 /* If a target on the current stack can attach, use it. */
2642 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2644 if (t
->to_create_inferior
!= NULL
)
2648 /* Otherwise, use the default run target. */
2650 t
= find_default_run_target ("run");
2655 /* Implement the "info proc" command. */
2658 target_info_proc (const char *args
, enum info_proc_what what
)
2660 struct target_ops
*t
;
2662 /* If we're already connected to something that can get us OS
2663 related data, use it. Otherwise, try using the native
2665 if (current_target
.to_stratum
>= process_stratum
)
2666 t
= current_target
.beneath
;
2668 t
= find_default_run_target (NULL
);
2670 for (; t
!= NULL
; t
= t
->beneath
)
2672 if (t
->to_info_proc
!= NULL
)
2674 t
->to_info_proc (t
, args
, what
);
2677 fprintf_unfiltered (gdb_stdlog
,
2678 "target_info_proc (\"%s\", %d)\n", args
, what
);
2688 find_default_supports_disable_randomization (struct target_ops
*self
)
2690 struct target_ops
*t
;
2692 t
= find_default_run_target (NULL
);
2693 if (t
&& t
->to_supports_disable_randomization
)
2694 return (t
->to_supports_disable_randomization
) (t
);
2699 target_supports_disable_randomization (void)
2701 struct target_ops
*t
;
2703 for (t
= ¤t_target
; t
!= NULL
; t
= t
->beneath
)
2704 if (t
->to_supports_disable_randomization
)
2705 return t
->to_supports_disable_randomization (t
);
2711 target_get_osdata (const char *type
)
2713 struct target_ops
*t
;
2715 /* If we're already connected to something that can get us OS
2716 related data, use it. Otherwise, try using the native
2718 if (current_target
.to_stratum
>= process_stratum
)
2719 t
= current_target
.beneath
;
2721 t
= find_default_run_target ("get OS data");
2726 return target_read_stralloc (t
, TARGET_OBJECT_OSDATA
, type
);
2729 static struct address_space
*
2730 default_thread_address_space (struct target_ops
*self
, ptid_t ptid
)
2732 struct inferior
*inf
;
2734 /* Fall-back to the "main" address space of the inferior. */
2735 inf
= find_inferior_ptid (ptid
);
2737 if (inf
== NULL
|| inf
->aspace
== NULL
)
2738 internal_error (__FILE__
, __LINE__
,
2739 _("Can't determine the current "
2740 "address space of thread %s\n"),
2741 target_pid_to_str (ptid
));
2746 /* Determine the current address space of thread PTID. */
2748 struct address_space
*
2749 target_thread_address_space (ptid_t ptid
)
2751 struct address_space
*aspace
;
2753 aspace
= current_target
.to_thread_address_space (¤t_target
, ptid
);
2754 gdb_assert (aspace
!= NULL
);
2760 /* Target file operations. */
2762 static struct target_ops
*
2763 default_fileio_target (void)
2765 /* If we're already connected to something that can perform
2766 file I/O, use it. Otherwise, try using the native target. */
2767 if (current_target
.to_stratum
>= process_stratum
)
2768 return current_target
.beneath
;
2770 return find_default_run_target ("file I/O");
2773 /* File handle for target file operations. */
2777 /* The target on which this file is open. */
2778 struct target_ops
*t
;
2780 /* The file descriptor on the target. */
2784 DEF_VEC_O (fileio_fh_t
);
2786 /* Vector of currently open file handles. The value returned by
2787 target_fileio_open and passed as the FD argument to other
2788 target_fileio_* functions is an index into this vector. This
2789 vector's entries are never freed; instead, files are marked as
2790 closed, and the handle becomes available for reuse. */
2791 static VEC (fileio_fh_t
) *fileio_fhandles
;
2793 /* Macro to check whether a fileio_fh_t represents a closed file. */
2794 #define is_closed_fileio_fh(fd) ((fd) < 0)
2796 /* Index into fileio_fhandles of the lowest handle that might be
2797 closed. This permits handle reuse without searching the whole
2798 list each time a new file is opened. */
2799 static int lowest_closed_fd
;
2801 /* Acquire a target fileio file descriptor. */
2804 acquire_fileio_fd (struct target_ops
*t
, int fd
)
2808 gdb_assert (!is_closed_fileio_fh (fd
));
2810 /* Search for closed handles to reuse. */
2812 VEC_iterate (fileio_fh_t
, fileio_fhandles
,
2813 lowest_closed_fd
, fh
);
2815 if (is_closed_fileio_fh (fh
->fd
))
2818 /* Push a new handle if no closed handles were found. */
2819 if (lowest_closed_fd
== VEC_length (fileio_fh_t
, fileio_fhandles
))
2820 fh
= VEC_safe_push (fileio_fh_t
, fileio_fhandles
, NULL
);
2822 /* Fill in the handle. */
2826 /* Return its index, and start the next lookup at
2828 return lowest_closed_fd
++;
2831 /* Release a target fileio file descriptor. */
2834 release_fileio_fd (int fd
, fileio_fh_t
*fh
)
2837 lowest_closed_fd
= min (lowest_closed_fd
, fd
);
2840 /* Return a pointer to the fileio_fhandle_t corresponding to FD. */
2842 #define fileio_fd_to_fh(fd) \
2843 VEC_index (fileio_fh_t, fileio_fhandles, (fd))
2845 /* Helper for target_fileio_open and
2846 target_fileio_open_warn_if_slow. */
2849 target_fileio_open_1 (struct inferior
*inf
, const char *filename
,
2850 int flags
, int mode
, int warn_if_slow
,
2853 struct target_ops
*t
;
2855 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
2857 if (t
->to_fileio_open
!= NULL
)
2859 int fd
= t
->to_fileio_open (t
, inf
, filename
, flags
, mode
,
2860 warn_if_slow
, target_errno
);
2865 fd
= acquire_fileio_fd (t
, fd
);
2868 fprintf_unfiltered (gdb_stdlog
,
2869 "target_fileio_open (%d,%s,0x%x,0%o,%d)"
2871 inf
== NULL
? 0 : inf
->num
,
2872 filename
, flags
, mode
,
2874 fd
!= -1 ? 0 : *target_errno
);
2879 *target_errno
= FILEIO_ENOSYS
;
2886 target_fileio_open (struct inferior
*inf
, const char *filename
,
2887 int flags
, int mode
, int *target_errno
)
2889 return target_fileio_open_1 (inf
, filename
, flags
, mode
, 0,
2896 target_fileio_open_warn_if_slow (struct inferior
*inf
,
2897 const char *filename
,
2898 int flags
, int mode
, int *target_errno
)
2900 return target_fileio_open_1 (inf
, filename
, flags
, mode
, 1,
2907 target_fileio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
2908 ULONGEST offset
, int *target_errno
)
2910 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
2913 if (is_closed_fileio_fh (fh
->fd
))
2914 *target_errno
= EBADF
;
2916 ret
= fh
->t
->to_fileio_pwrite (fh
->t
, fh
->fd
, write_buf
,
2917 len
, offset
, target_errno
);
2920 fprintf_unfiltered (gdb_stdlog
,
2921 "target_fileio_pwrite (%d,...,%d,%s) "
2923 fd
, len
, pulongest (offset
),
2924 ret
, ret
!= -1 ? 0 : *target_errno
);
2931 target_fileio_pread (int fd
, gdb_byte
*read_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_pread (fh
->t
, fh
->fd
, read_buf
,
2941 len
, offset
, target_errno
);
2944 fprintf_unfiltered (gdb_stdlog
,
2945 "target_fileio_pread (%d,...,%d,%s) "
2947 fd
, len
, pulongest (offset
),
2948 ret
, ret
!= -1 ? 0 : *target_errno
);
2955 target_fileio_fstat (int fd
, struct stat
*sb
, int *target_errno
)
2957 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
2960 if (is_closed_fileio_fh (fh
->fd
))
2961 *target_errno
= EBADF
;
2963 ret
= fh
->t
->to_fileio_fstat (fh
->t
, fh
->fd
, sb
, target_errno
);
2966 fprintf_unfiltered (gdb_stdlog
,
2967 "target_fileio_fstat (%d) = %d (%d)\n",
2968 fd
, ret
, ret
!= -1 ? 0 : *target_errno
);
2975 target_fileio_close (int fd
, int *target_errno
)
2977 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
2980 if (is_closed_fileio_fh (fh
->fd
))
2981 *target_errno
= EBADF
;
2984 ret
= fh
->t
->to_fileio_close (fh
->t
, fh
->fd
, target_errno
);
2985 release_fileio_fd (fd
, fh
);
2989 fprintf_unfiltered (gdb_stdlog
,
2990 "target_fileio_close (%d) = %d (%d)\n",
2991 fd
, ret
, ret
!= -1 ? 0 : *target_errno
);
2998 target_fileio_unlink (struct inferior
*inf
, const char *filename
,
3001 struct target_ops
*t
;
3003 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
3005 if (t
->to_fileio_unlink
!= NULL
)
3007 int ret
= t
->to_fileio_unlink (t
, inf
, filename
,
3011 fprintf_unfiltered (gdb_stdlog
,
3012 "target_fileio_unlink (%d,%s)"
3014 inf
== NULL
? 0 : inf
->num
, filename
,
3015 ret
, ret
!= -1 ? 0 : *target_errno
);
3020 *target_errno
= FILEIO_ENOSYS
;
3027 target_fileio_readlink (struct inferior
*inf
, const char *filename
,
3030 struct target_ops
*t
;
3032 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
3034 if (t
->to_fileio_readlink
!= NULL
)
3036 char *ret
= t
->to_fileio_readlink (t
, inf
, filename
,
3040 fprintf_unfiltered (gdb_stdlog
,
3041 "target_fileio_readlink (%d,%s)"
3043 inf
== NULL
? 0 : inf
->num
,
3044 filename
, ret
? ret
: "(nil)",
3045 ret
? 0 : *target_errno
);
3050 *target_errno
= FILEIO_ENOSYS
;
3055 target_fileio_close_cleanup (void *opaque
)
3057 int fd
= *(int *) opaque
;
3060 target_fileio_close (fd
, &target_errno
);
3063 /* Read target file FILENAME, in the filesystem as seen by INF. If
3064 INF is NULL, use the filesystem seen by the debugger (GDB or, for
3065 remote targets, the remote stub). Store the result in *BUF_P and
3066 return the size of the transferred data. PADDING additional bytes
3067 are available in *BUF_P. This is a helper function for
3068 target_fileio_read_alloc; see the declaration of that function for
3069 more information. */
3072 target_fileio_read_alloc_1 (struct inferior
*inf
, const char *filename
,
3073 gdb_byte
**buf_p
, int padding
)
3075 struct cleanup
*close_cleanup
;
3076 size_t buf_alloc
, buf_pos
;
3082 fd
= target_fileio_open (inf
, filename
, FILEIO_O_RDONLY
, 0700,
3087 close_cleanup
= make_cleanup (target_fileio_close_cleanup
, &fd
);
3089 /* Start by reading up to 4K at a time. The target will throttle
3090 this number down if necessary. */
3092 buf
= (gdb_byte
*) xmalloc (buf_alloc
);
3096 n
= target_fileio_pread (fd
, &buf
[buf_pos
],
3097 buf_alloc
- buf_pos
- padding
, buf_pos
,
3101 /* An error occurred. */
3102 do_cleanups (close_cleanup
);
3108 /* Read all there was. */
3109 do_cleanups (close_cleanup
);
3119 /* If the buffer is filling up, expand it. */
3120 if (buf_alloc
< buf_pos
* 2)
3123 buf
= (gdb_byte
*) xrealloc (buf
, buf_alloc
);
3133 target_fileio_read_alloc (struct inferior
*inf
, const char *filename
,
3136 return target_fileio_read_alloc_1 (inf
, filename
, buf_p
, 0);
3142 target_fileio_read_stralloc (struct inferior
*inf
, const char *filename
)
3146 LONGEST i
, transferred
;
3148 transferred
= target_fileio_read_alloc_1 (inf
, filename
, &buffer
, 1);
3149 bufstr
= (char *) buffer
;
3151 if (transferred
< 0)
3154 if (transferred
== 0)
3155 return xstrdup ("");
3157 bufstr
[transferred
] = 0;
3159 /* Check for embedded NUL bytes; but allow trailing NULs. */
3160 for (i
= strlen (bufstr
); i
< transferred
; i
++)
3163 warning (_("target file %s "
3164 "contained unexpected null characters"),
3174 default_region_ok_for_hw_watchpoint (struct target_ops
*self
,
3175 CORE_ADDR addr
, int len
)
3177 return (len
<= gdbarch_ptr_bit (target_gdbarch ()) / TARGET_CHAR_BIT
);
3181 default_watchpoint_addr_within_range (struct target_ops
*target
,
3183 CORE_ADDR start
, int length
)
3185 return addr
>= start
&& addr
< start
+ length
;
3188 static struct gdbarch
*
3189 default_thread_architecture (struct target_ops
*ops
, ptid_t ptid
)
3191 return target_gdbarch ();
3195 return_zero (struct target_ops
*ignore
)
3201 return_zero_has_execution (struct target_ops
*ignore
, ptid_t ignore2
)
3207 * Find the next target down the stack from the specified target.
3211 find_target_beneath (struct target_ops
*t
)
3219 find_target_at (enum strata stratum
)
3221 struct target_ops
*t
;
3223 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3224 if (t
->to_stratum
== stratum
)
3231 /* The inferior process has died. Long live the inferior! */
3234 generic_mourn_inferior (void)
3238 ptid
= inferior_ptid
;
3239 inferior_ptid
= null_ptid
;
3241 /* Mark breakpoints uninserted in case something tries to delete a
3242 breakpoint while we delete the inferior's threads (which would
3243 fail, since the inferior is long gone). */
3244 mark_breakpoints_out ();
3246 if (!ptid_equal (ptid
, null_ptid
))
3248 int pid
= ptid_get_pid (ptid
);
3249 exit_inferior (pid
);
3252 /* Note this wipes step-resume breakpoints, so needs to be done
3253 after exit_inferior, which ends up referencing the step-resume
3254 breakpoints through clear_thread_inferior_resources. */
3255 breakpoint_init_inferior (inf_exited
);
3257 registers_changed ();
3259 reopen_exec_file ();
3260 reinit_frame_cache ();
3262 if (deprecated_detach_hook
)
3263 deprecated_detach_hook ();
3266 /* Convert a normal process ID to a string. Returns the string in a
3270 normal_pid_to_str (ptid_t ptid
)
3272 static char buf
[32];
3274 xsnprintf (buf
, sizeof buf
, "process %d", ptid_get_pid (ptid
));
3279 default_pid_to_str (struct target_ops
*ops
, ptid_t ptid
)
3281 return normal_pid_to_str (ptid
);
3284 /* Error-catcher for target_find_memory_regions. */
3286 dummy_find_memory_regions (struct target_ops
*self
,
3287 find_memory_region_ftype ignore1
, void *ignore2
)
3289 error (_("Command not implemented for this target."));
3293 /* Error-catcher for target_make_corefile_notes. */
3295 dummy_make_corefile_notes (struct target_ops
*self
,
3296 bfd
*ignore1
, int *ignore2
)
3298 error (_("Command not implemented for this target."));
3302 /* Set up the handful of non-empty slots needed by the dummy target
3306 init_dummy_target (void)
3308 dummy_target
.to_shortname
= "None";
3309 dummy_target
.to_longname
= "None";
3310 dummy_target
.to_doc
= "";
3311 dummy_target
.to_supports_disable_randomization
3312 = find_default_supports_disable_randomization
;
3313 dummy_target
.to_stratum
= dummy_stratum
;
3314 dummy_target
.to_has_all_memory
= return_zero
;
3315 dummy_target
.to_has_memory
= return_zero
;
3316 dummy_target
.to_has_stack
= return_zero
;
3317 dummy_target
.to_has_registers
= return_zero
;
3318 dummy_target
.to_has_execution
= return_zero_has_execution
;
3319 dummy_target
.to_magic
= OPS_MAGIC
;
3321 install_dummy_methods (&dummy_target
);
3326 target_close (struct target_ops
*targ
)
3328 gdb_assert (!target_is_pushed (targ
));
3330 if (targ
->to_xclose
!= NULL
)
3331 targ
->to_xclose (targ
);
3332 else if (targ
->to_close
!= NULL
)
3333 targ
->to_close (targ
);
3336 fprintf_unfiltered (gdb_stdlog
, "target_close ()\n");
3340 target_thread_alive (ptid_t ptid
)
3342 return current_target
.to_thread_alive (¤t_target
, ptid
);
3346 target_update_thread_list (void)
3348 current_target
.to_update_thread_list (¤t_target
);
3352 target_stop (ptid_t ptid
)
3356 warning (_("May not interrupt or stop the target, ignoring attempt"));
3360 (*current_target
.to_stop
) (¤t_target
, ptid
);
3364 target_interrupt (ptid_t ptid
)
3368 warning (_("May not interrupt or stop the target, ignoring attempt"));
3372 (*current_target
.to_interrupt
) (¤t_target
, ptid
);
3378 target_pass_ctrlc (void)
3380 (*current_target
.to_pass_ctrlc
) (¤t_target
);
3386 default_target_pass_ctrlc (struct target_ops
*ops
)
3388 target_interrupt (inferior_ptid
);
3391 /* See target/target.h. */
3394 target_stop_and_wait (ptid_t ptid
)
3396 struct target_waitstatus status
;
3397 int was_non_stop
= non_stop
;
3402 memset (&status
, 0, sizeof (status
));
3403 target_wait (ptid
, &status
, 0);
3405 non_stop
= was_non_stop
;
3408 /* See target/target.h. */
3411 target_continue_no_signal (ptid_t ptid
)
3413 target_resume (ptid
, 0, GDB_SIGNAL_0
);
3416 /* Concatenate ELEM to LIST, a comma separate list, and return the
3417 result. The LIST incoming argument is released. */
3420 str_comma_list_concat_elem (char *list
, const char *elem
)
3423 return xstrdup (elem
);
3425 return reconcat (list
, list
, ", ", elem
, (char *) NULL
);
3428 /* Helper for target_options_to_string. If OPT is present in
3429 TARGET_OPTIONS, append the OPT_STR (string version of OPT) in RET.
3430 Returns the new resulting string. OPT is removed from
3434 do_option (int *target_options
, char *ret
,
3435 int opt
, char *opt_str
)
3437 if ((*target_options
& opt
) != 0)
3439 ret
= str_comma_list_concat_elem (ret
, opt_str
);
3440 *target_options
&= ~opt
;
3447 target_options_to_string (int target_options
)
3451 #define DO_TARG_OPTION(OPT) \
3452 ret = do_option (&target_options, ret, OPT, #OPT)
3454 DO_TARG_OPTION (TARGET_WNOHANG
);
3456 if (target_options
!= 0)
3457 ret
= str_comma_list_concat_elem (ret
, "unknown???");
3465 debug_print_register (const char * func
,
3466 struct regcache
*regcache
, int regno
)
3468 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
3470 fprintf_unfiltered (gdb_stdlog
, "%s ", func
);
3471 if (regno
>= 0 && regno
< gdbarch_num_regs (gdbarch
)
3472 && gdbarch_register_name (gdbarch
, regno
) != NULL
3473 && gdbarch_register_name (gdbarch
, regno
)[0] != '\0')
3474 fprintf_unfiltered (gdb_stdlog
, "(%s)",
3475 gdbarch_register_name (gdbarch
, regno
));
3477 fprintf_unfiltered (gdb_stdlog
, "(%d)", regno
);
3478 if (regno
>= 0 && regno
< gdbarch_num_regs (gdbarch
))
3480 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
3481 int i
, size
= register_size (gdbarch
, regno
);
3482 gdb_byte buf
[MAX_REGISTER_SIZE
];
3484 regcache_raw_collect (regcache
, regno
, buf
);
3485 fprintf_unfiltered (gdb_stdlog
, " = ");
3486 for (i
= 0; i
< size
; i
++)
3488 fprintf_unfiltered (gdb_stdlog
, "%02x", buf
[i
]);
3490 if (size
<= sizeof (LONGEST
))
3492 ULONGEST val
= extract_unsigned_integer (buf
, size
, byte_order
);
3494 fprintf_unfiltered (gdb_stdlog
, " %s %s",
3495 core_addr_to_string_nz (val
), plongest (val
));
3498 fprintf_unfiltered (gdb_stdlog
, "\n");
3502 target_fetch_registers (struct regcache
*regcache
, int regno
)
3504 current_target
.to_fetch_registers (¤t_target
, regcache
, regno
);
3506 debug_print_register ("target_fetch_registers", regcache
, regno
);
3510 target_store_registers (struct regcache
*regcache
, int regno
)
3512 if (!may_write_registers
)
3513 error (_("Writing to registers is not allowed (regno %d)"), regno
);
3515 current_target
.to_store_registers (¤t_target
, regcache
, regno
);
3518 debug_print_register ("target_store_registers", regcache
, regno
);
3523 target_core_of_thread (ptid_t ptid
)
3525 return current_target
.to_core_of_thread (¤t_target
, ptid
);
3529 simple_verify_memory (struct target_ops
*ops
,
3530 const gdb_byte
*data
, CORE_ADDR lma
, ULONGEST size
)
3532 LONGEST total_xfered
= 0;
3534 while (total_xfered
< size
)
3536 ULONGEST xfered_len
;
3537 enum target_xfer_status status
;
3539 ULONGEST howmuch
= min (sizeof (buf
), size
- total_xfered
);
3541 status
= target_xfer_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
3542 buf
, NULL
, lma
+ total_xfered
, howmuch
,
3544 if (status
== TARGET_XFER_OK
3545 && memcmp (data
+ total_xfered
, buf
, xfered_len
) == 0)
3547 total_xfered
+= xfered_len
;
3556 /* Default implementation of memory verification. */
3559 default_verify_memory (struct target_ops
*self
,
3560 const gdb_byte
*data
, CORE_ADDR memaddr
, ULONGEST size
)
3562 /* Start over from the top of the target stack. */
3563 return simple_verify_memory (current_target
.beneath
,
3564 data
, memaddr
, size
);
3568 target_verify_memory (const gdb_byte
*data
, CORE_ADDR memaddr
, ULONGEST size
)
3570 return current_target
.to_verify_memory (¤t_target
,
3571 data
, memaddr
, size
);
3574 /* The documentation for this function is in its prototype declaration in
3578 target_insert_mask_watchpoint (CORE_ADDR addr
, CORE_ADDR mask
,
3579 enum target_hw_bp_type rw
)
3581 return current_target
.to_insert_mask_watchpoint (¤t_target
,
3585 /* The documentation for this function is in its prototype declaration in
3589 target_remove_mask_watchpoint (CORE_ADDR addr
, CORE_ADDR mask
,
3590 enum target_hw_bp_type rw
)
3592 return current_target
.to_remove_mask_watchpoint (¤t_target
,
3596 /* The documentation for this function is in its prototype declaration
3600 target_masked_watch_num_registers (CORE_ADDR addr
, CORE_ADDR mask
)
3602 return current_target
.to_masked_watch_num_registers (¤t_target
,
3606 /* The documentation for this function is in its prototype declaration
3610 target_ranged_break_num_registers (void)
3612 return current_target
.to_ranged_break_num_registers (¤t_target
);
3618 target_supports_btrace (enum btrace_format format
)
3620 return current_target
.to_supports_btrace (¤t_target
, format
);
3625 struct btrace_target_info
*
3626 target_enable_btrace (ptid_t ptid
, const struct btrace_config
*conf
)
3628 return current_target
.to_enable_btrace (¤t_target
, ptid
, conf
);
3634 target_disable_btrace (struct btrace_target_info
*btinfo
)
3636 current_target
.to_disable_btrace (¤t_target
, btinfo
);
3642 target_teardown_btrace (struct btrace_target_info
*btinfo
)
3644 current_target
.to_teardown_btrace (¤t_target
, btinfo
);
3650 target_read_btrace (struct btrace_data
*btrace
,
3651 struct btrace_target_info
*btinfo
,
3652 enum btrace_read_type type
)
3654 return current_target
.to_read_btrace (¤t_target
, btrace
, btinfo
, type
);
3659 const struct btrace_config
*
3660 target_btrace_conf (const struct btrace_target_info
*btinfo
)
3662 return current_target
.to_btrace_conf (¤t_target
, btinfo
);
3668 target_stop_recording (void)
3670 current_target
.to_stop_recording (¤t_target
);
3676 target_save_record (const char *filename
)
3678 current_target
.to_save_record (¤t_target
, filename
);
3684 target_supports_delete_record (void)
3686 struct target_ops
*t
;
3688 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3689 if (t
->to_delete_record
!= delegate_delete_record
3690 && t
->to_delete_record
!= tdefault_delete_record
)
3699 target_delete_record (void)
3701 current_target
.to_delete_record (¤t_target
);
3707 target_record_is_replaying (ptid_t ptid
)
3709 return current_target
.to_record_is_replaying (¤t_target
, ptid
);
3715 target_record_will_replay (ptid_t ptid
, int dir
)
3717 return current_target
.to_record_will_replay (¤t_target
, ptid
, dir
);
3723 target_record_stop_replaying (void)
3725 current_target
.to_record_stop_replaying (¤t_target
);
3731 target_goto_record_begin (void)
3733 current_target
.to_goto_record_begin (¤t_target
);
3739 target_goto_record_end (void)
3741 current_target
.to_goto_record_end (¤t_target
);
3747 target_goto_record (ULONGEST insn
)
3749 current_target
.to_goto_record (¤t_target
, insn
);
3755 target_insn_history (int size
, int flags
)
3757 current_target
.to_insn_history (¤t_target
, size
, flags
);
3763 target_insn_history_from (ULONGEST from
, int size
, int flags
)
3765 current_target
.to_insn_history_from (¤t_target
, from
, size
, flags
);
3771 target_insn_history_range (ULONGEST begin
, ULONGEST end
, int flags
)
3773 current_target
.to_insn_history_range (¤t_target
, begin
, end
, flags
);
3779 target_call_history (int size
, int flags
)
3781 current_target
.to_call_history (¤t_target
, size
, flags
);
3787 target_call_history_from (ULONGEST begin
, int size
, int flags
)
3789 current_target
.to_call_history_from (¤t_target
, begin
, size
, flags
);
3795 target_call_history_range (ULONGEST begin
, ULONGEST end
, int flags
)
3797 current_target
.to_call_history_range (¤t_target
, begin
, end
, flags
);
3802 const struct frame_unwind
*
3803 target_get_unwinder (void)
3805 return current_target
.to_get_unwinder (¤t_target
);
3810 const struct frame_unwind
*
3811 target_get_tailcall_unwinder (void)
3813 return current_target
.to_get_tailcall_unwinder (¤t_target
);
3819 target_prepare_to_generate_core (void)
3821 current_target
.to_prepare_to_generate_core (¤t_target
);
3827 target_done_generating_core (void)
3829 current_target
.to_done_generating_core (¤t_target
);
3833 setup_target_debug (void)
3835 memcpy (&debug_target
, ¤t_target
, sizeof debug_target
);
3837 init_debug_target (¤t_target
);
3841 static char targ_desc
[] =
3842 "Names of targets and files being debugged.\nShows the entire \
3843 stack of targets currently in use (including the exec-file,\n\
3844 core-file, and process, if any), as well as the symbol file name.";
3847 default_rcmd (struct target_ops
*self
, const char *command
,
3848 struct ui_file
*output
)
3850 error (_("\"monitor\" command not supported by this target."));
3854 do_monitor_command (char *cmd
,
3857 target_rcmd (cmd
, gdb_stdtarg
);
3860 /* Print the name of each layers of our target stack. */
3863 maintenance_print_target_stack (char *cmd
, int from_tty
)
3865 struct target_ops
*t
;
3867 printf_filtered (_("The current target stack is:\n"));
3869 for (t
= target_stack
; t
!= NULL
; t
= t
->beneath
)
3871 printf_filtered (" - %s (%s)\n", t
->to_shortname
, t
->to_longname
);
3878 target_async (int enable
)
3880 infrun_async (enable
);
3881 current_target
.to_async (¤t_target
, enable
);
3887 target_thread_events (int enable
)
3889 current_target
.to_thread_events (¤t_target
, enable
);
3892 /* Controls if targets can report that they can/are async. This is
3893 just for maintainers to use when debugging gdb. */
3894 int target_async_permitted
= 1;
3896 /* The set command writes to this variable. If the inferior is
3897 executing, target_async_permitted is *not* updated. */
3898 static int target_async_permitted_1
= 1;
3901 maint_set_target_async_command (char *args
, int from_tty
,
3902 struct cmd_list_element
*c
)
3904 if (have_live_inferiors ())
3906 target_async_permitted_1
= target_async_permitted
;
3907 error (_("Cannot change this setting while the inferior is running."));
3910 target_async_permitted
= target_async_permitted_1
;
3914 maint_show_target_async_command (struct ui_file
*file
, int from_tty
,
3915 struct cmd_list_element
*c
,
3918 fprintf_filtered (file
,
3919 _("Controlling the inferior in "
3920 "asynchronous mode is %s.\n"), value
);
3923 /* Return true if the target operates in non-stop mode even with "set
3927 target_always_non_stop_p (void)
3929 return current_target
.to_always_non_stop_p (¤t_target
);
3935 target_is_non_stop_p (void)
3938 || target_non_stop_enabled
== AUTO_BOOLEAN_TRUE
3939 || (target_non_stop_enabled
== AUTO_BOOLEAN_AUTO
3940 && target_always_non_stop_p ()));
3943 /* Controls if targets can report that they always run in non-stop
3944 mode. This is just for maintainers to use when debugging gdb. */
3945 enum auto_boolean target_non_stop_enabled
= AUTO_BOOLEAN_AUTO
;
3947 /* The set command writes to this variable. If the inferior is
3948 executing, target_non_stop_enabled is *not* updated. */
3949 static enum auto_boolean target_non_stop_enabled_1
= AUTO_BOOLEAN_AUTO
;
3951 /* Implementation of "maint set target-non-stop". */
3954 maint_set_target_non_stop_command (char *args
, int from_tty
,
3955 struct cmd_list_element
*c
)
3957 if (have_live_inferiors ())
3959 target_non_stop_enabled_1
= target_non_stop_enabled
;
3960 error (_("Cannot change this setting while the inferior is running."));
3963 target_non_stop_enabled
= target_non_stop_enabled_1
;
3966 /* Implementation of "maint show target-non-stop". */
3969 maint_show_target_non_stop_command (struct ui_file
*file
, int from_tty
,
3970 struct cmd_list_element
*c
,
3973 if (target_non_stop_enabled
== AUTO_BOOLEAN_AUTO
)
3974 fprintf_filtered (file
,
3975 _("Whether the target is always in non-stop mode "
3976 "is %s (currently %s).\n"), value
,
3977 target_always_non_stop_p () ? "on" : "off");
3979 fprintf_filtered (file
,
3980 _("Whether the target is always in non-stop mode "
3981 "is %s.\n"), value
);
3984 /* Temporary copies of permission settings. */
3986 static int may_write_registers_1
= 1;
3987 static int may_write_memory_1
= 1;
3988 static int may_insert_breakpoints_1
= 1;
3989 static int may_insert_tracepoints_1
= 1;
3990 static int may_insert_fast_tracepoints_1
= 1;
3991 static int may_stop_1
= 1;
3993 /* Make the user-set values match the real values again. */
3996 update_target_permissions (void)
3998 may_write_registers_1
= may_write_registers
;
3999 may_write_memory_1
= may_write_memory
;
4000 may_insert_breakpoints_1
= may_insert_breakpoints
;
4001 may_insert_tracepoints_1
= may_insert_tracepoints
;
4002 may_insert_fast_tracepoints_1
= may_insert_fast_tracepoints
;
4003 may_stop_1
= may_stop
;
4006 /* The one function handles (most of) the permission flags in the same
4010 set_target_permissions (char *args
, int from_tty
,
4011 struct cmd_list_element
*c
)
4013 if (target_has_execution
)
4015 update_target_permissions ();
4016 error (_("Cannot change this setting while the inferior is running."));
4019 /* Make the real values match the user-changed values. */
4020 may_write_registers
= may_write_registers_1
;
4021 may_insert_breakpoints
= may_insert_breakpoints_1
;
4022 may_insert_tracepoints
= may_insert_tracepoints_1
;
4023 may_insert_fast_tracepoints
= may_insert_fast_tracepoints_1
;
4024 may_stop
= may_stop_1
;
4025 update_observer_mode ();
4028 /* Set memory write permission independently of observer mode. */
4031 set_write_memory_permission (char *args
, int from_tty
,
4032 struct cmd_list_element
*c
)
4034 /* Make the real values match the user-changed values. */
4035 may_write_memory
= may_write_memory_1
;
4036 update_observer_mode ();
4041 initialize_targets (void)
4043 init_dummy_target ();
4044 push_target (&dummy_target
);
4046 add_info ("target", target_info
, targ_desc
);
4047 add_info ("files", target_info
, targ_desc
);
4049 add_setshow_zuinteger_cmd ("target", class_maintenance
, &targetdebug
, _("\
4050 Set target debugging."), _("\
4051 Show target debugging."), _("\
4052 When non-zero, target debugging is enabled. Higher numbers are more\n\
4056 &setdebuglist
, &showdebuglist
);
4058 add_setshow_boolean_cmd ("trust-readonly-sections", class_support
,
4059 &trust_readonly
, _("\
4060 Set mode for reading from readonly sections."), _("\
4061 Show mode for reading from readonly sections."), _("\
4062 When this mode is on, memory reads from readonly sections (such as .text)\n\
4063 will be read from the object file instead of from the target. This will\n\
4064 result in significant performance improvement for remote targets."),
4066 show_trust_readonly
,
4067 &setlist
, &showlist
);
4069 add_com ("monitor", class_obscure
, do_monitor_command
,
4070 _("Send a command to the remote monitor (remote targets only)."));
4072 add_cmd ("target-stack", class_maintenance
, maintenance_print_target_stack
,
4073 _("Print the name of each layer of the internal target stack."),
4074 &maintenanceprintlist
);
4076 add_setshow_boolean_cmd ("target-async", no_class
,
4077 &target_async_permitted_1
, _("\
4078 Set whether gdb controls the inferior in asynchronous mode."), _("\
4079 Show whether gdb controls the inferior in asynchronous mode."), _("\
4080 Tells gdb whether to control the inferior in asynchronous mode."),
4081 maint_set_target_async_command
,
4082 maint_show_target_async_command
,
4083 &maintenance_set_cmdlist
,
4084 &maintenance_show_cmdlist
);
4086 add_setshow_auto_boolean_cmd ("target-non-stop", no_class
,
4087 &target_non_stop_enabled_1
, _("\
4088 Set whether gdb always controls the inferior in non-stop mode."), _("\
4089 Show whether gdb always controls the inferior in non-stop mode."), _("\
4090 Tells gdb whether to control the inferior in non-stop mode."),
4091 maint_set_target_non_stop_command
,
4092 maint_show_target_non_stop_command
,
4093 &maintenance_set_cmdlist
,
4094 &maintenance_show_cmdlist
);
4096 add_setshow_boolean_cmd ("may-write-registers", class_support
,
4097 &may_write_registers_1
, _("\
4098 Set permission to write into registers."), _("\
4099 Show permission to write into registers."), _("\
4100 When this permission is on, GDB may write into the target's registers.\n\
4101 Otherwise, any sort of write attempt will result in an error."),
4102 set_target_permissions
, NULL
,
4103 &setlist
, &showlist
);
4105 add_setshow_boolean_cmd ("may-write-memory", class_support
,
4106 &may_write_memory_1
, _("\
4107 Set permission to write into target memory."), _("\
4108 Show permission to write into target memory."), _("\
4109 When this permission is on, GDB may write into the target's memory.\n\
4110 Otherwise, any sort of write attempt will result in an error."),
4111 set_write_memory_permission
, NULL
,
4112 &setlist
, &showlist
);
4114 add_setshow_boolean_cmd ("may-insert-breakpoints", class_support
,
4115 &may_insert_breakpoints_1
, _("\
4116 Set permission to insert breakpoints in the target."), _("\
4117 Show permission to insert breakpoints in the target."), _("\
4118 When this permission is on, GDB may insert breakpoints in the program.\n\
4119 Otherwise, any sort of insertion attempt will result in an error."),
4120 set_target_permissions
, NULL
,
4121 &setlist
, &showlist
);
4123 add_setshow_boolean_cmd ("may-insert-tracepoints", class_support
,
4124 &may_insert_tracepoints_1
, _("\
4125 Set permission to insert tracepoints in the target."), _("\
4126 Show permission to insert tracepoints in the target."), _("\
4127 When this permission is on, GDB may insert tracepoints in the program.\n\
4128 Otherwise, any sort of insertion attempt will result in an error."),
4129 set_target_permissions
, NULL
,
4130 &setlist
, &showlist
);
4132 add_setshow_boolean_cmd ("may-insert-fast-tracepoints", class_support
,
4133 &may_insert_fast_tracepoints_1
, _("\
4134 Set permission to insert fast tracepoints in the target."), _("\
4135 Show permission to insert fast tracepoints in the target."), _("\
4136 When this permission is on, GDB may insert fast tracepoints.\n\
4137 Otherwise, any sort of insertion attempt will result in an error."),
4138 set_target_permissions
, NULL
,
4139 &setlist
, &showlist
);
4141 add_setshow_boolean_cmd ("may-interrupt", class_support
,
4143 Set permission to interrupt or signal the target."), _("\
4144 Show permission to interrupt or signal the target."), _("\
4145 When this permission is on, GDB may interrupt/stop the target's execution.\n\
4146 Otherwise, any attempt to interrupt or stop will be ignored."),
4147 set_target_permissions
, NULL
,
4148 &setlist
, &showlist
);
4150 add_setshow_boolean_cmd ("auto-connect-native-target", class_support
,
4151 &auto_connect_native_target
, _("\
4152 Set whether GDB may automatically connect to the native target."), _("\
4153 Show whether GDB may automatically connect to the native target."), _("\
4154 When on, and GDB is not connected to a target yet, GDB\n\
4155 attempts \"run\" and other commands with the native target."),
4156 NULL
, show_auto_connect_native_target
,
4157 &setlist
, &showlist
);