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 static void target_info (char *, int);
49 static void generic_tls_error (void) ATTRIBUTE_NORETURN
;
51 static void default_terminal_info (struct target_ops
*, const char *, int);
53 static int default_watchpoint_addr_within_range (struct target_ops
*,
54 CORE_ADDR
, CORE_ADDR
, int);
56 static int default_region_ok_for_hw_watchpoint (struct target_ops
*,
59 static void default_rcmd (struct target_ops
*, const char *, struct ui_file
*);
61 static ptid_t
default_get_ada_task_ptid (struct target_ops
*self
,
64 static int default_follow_fork (struct target_ops
*self
, int follow_child
,
67 static void default_mourn_inferior (struct target_ops
*self
);
69 static int default_search_memory (struct target_ops
*ops
,
71 ULONGEST search_space_len
,
72 const gdb_byte
*pattern
,
74 CORE_ADDR
*found_addrp
);
76 static int default_verify_memory (struct target_ops
*self
,
78 CORE_ADDR memaddr
, ULONGEST size
);
80 static struct address_space
*default_thread_address_space
81 (struct target_ops
*self
, ptid_t ptid
);
83 static void tcomplain (void) ATTRIBUTE_NORETURN
;
85 static int return_zero (struct target_ops
*);
87 static int return_zero_has_execution (struct target_ops
*, ptid_t
);
89 static void target_command (char *, int);
91 static struct target_ops
*find_default_run_target (char *);
93 static struct gdbarch
*default_thread_architecture (struct target_ops
*ops
,
96 static int dummy_find_memory_regions (struct target_ops
*self
,
97 find_memory_region_ftype ignore1
,
100 static char *dummy_make_corefile_notes (struct target_ops
*self
,
101 bfd
*ignore1
, int *ignore2
);
103 static char *default_pid_to_str (struct target_ops
*ops
, ptid_t ptid
);
105 static enum exec_direction_kind default_execution_direction
106 (struct target_ops
*self
);
108 static struct target_ops debug_target
;
110 #include "target-delegates.c"
112 static void init_dummy_target (void);
114 static void update_current_target (void);
116 /* Vector of existing target structures. */
117 typedef struct target_ops
*target_ops_p
;
118 DEF_VEC_P (target_ops_p
);
119 static VEC (target_ops_p
) *target_structs
;
121 /* The initial current target, so that there is always a semi-valid
124 static struct target_ops dummy_target
;
126 /* Top of target stack. */
128 static struct target_ops
*target_stack
;
130 /* The target structure we are currently using to talk to a process
131 or file or whatever "inferior" we have. */
133 struct target_ops current_target
;
135 /* Command list for target. */
137 static struct cmd_list_element
*targetlist
= NULL
;
139 /* Nonzero if we should trust readonly sections from the
140 executable when reading memory. */
142 static int trust_readonly
= 0;
144 /* Nonzero if we should show true memory content including
145 memory breakpoint inserted by gdb. */
147 static int show_memory_breakpoints
= 0;
149 /* These globals control whether GDB attempts to perform these
150 operations; they are useful for targets that need to prevent
151 inadvertant disruption, such as in non-stop mode. */
153 int may_write_registers
= 1;
155 int may_write_memory
= 1;
157 int may_insert_breakpoints
= 1;
159 int may_insert_tracepoints
= 1;
161 int may_insert_fast_tracepoints
= 1;
165 /* Non-zero if we want to see trace of target level stuff. */
167 static unsigned int targetdebug
= 0;
170 set_targetdebug (char *args
, int from_tty
, struct cmd_list_element
*c
)
172 update_current_target ();
176 show_targetdebug (struct ui_file
*file
, int from_tty
,
177 struct cmd_list_element
*c
, const char *value
)
179 fprintf_filtered (file
, _("Target debugging is %s.\n"), value
);
182 static void setup_target_debug (void);
184 /* The user just typed 'target' without the name of a target. */
187 target_command (char *arg
, int from_tty
)
189 fputs_filtered ("Argument required (target name). Try `help target'\n",
193 /* Default target_has_* methods for process_stratum targets. */
196 default_child_has_all_memory (struct target_ops
*ops
)
198 /* If no inferior selected, then we can't read memory here. */
199 if (ptid_equal (inferior_ptid
, null_ptid
))
206 default_child_has_memory (struct target_ops
*ops
)
208 /* If no inferior selected, then we can't read memory here. */
209 if (ptid_equal (inferior_ptid
, null_ptid
))
216 default_child_has_stack (struct target_ops
*ops
)
218 /* If no inferior selected, there's no stack. */
219 if (ptid_equal (inferior_ptid
, null_ptid
))
226 default_child_has_registers (struct target_ops
*ops
)
228 /* Can't read registers from no inferior. */
229 if (ptid_equal (inferior_ptid
, null_ptid
))
236 default_child_has_execution (struct target_ops
*ops
, ptid_t the_ptid
)
238 /* If there's no thread selected, then we can't make it run through
240 if (ptid_equal (the_ptid
, null_ptid
))
248 target_has_all_memory_1 (void)
250 struct target_ops
*t
;
252 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
253 if (t
->to_has_all_memory (t
))
260 target_has_memory_1 (void)
262 struct target_ops
*t
;
264 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
265 if (t
->to_has_memory (t
))
272 target_has_stack_1 (void)
274 struct target_ops
*t
;
276 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
277 if (t
->to_has_stack (t
))
284 target_has_registers_1 (void)
286 struct target_ops
*t
;
288 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
289 if (t
->to_has_registers (t
))
296 target_has_execution_1 (ptid_t the_ptid
)
298 struct target_ops
*t
;
300 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
301 if (t
->to_has_execution (t
, the_ptid
))
308 target_has_execution_current (void)
310 return target_has_execution_1 (inferior_ptid
);
313 /* Complete initialization of T. This ensures that various fields in
314 T are set, if needed by the target implementation. */
317 complete_target_initialization (struct target_ops
*t
)
319 /* Provide default values for all "must have" methods. */
321 if (t
->to_has_all_memory
== NULL
)
322 t
->to_has_all_memory
= return_zero
;
324 if (t
->to_has_memory
== NULL
)
325 t
->to_has_memory
= return_zero
;
327 if (t
->to_has_stack
== NULL
)
328 t
->to_has_stack
= return_zero
;
330 if (t
->to_has_registers
== NULL
)
331 t
->to_has_registers
= return_zero
;
333 if (t
->to_has_execution
== NULL
)
334 t
->to_has_execution
= return_zero_has_execution
;
336 /* These methods can be called on an unpushed target and so require
337 a default implementation if the target might plausibly be the
338 default run target. */
339 gdb_assert (t
->to_can_run
== NULL
|| (t
->to_can_async_p
!= NULL
340 && t
->to_supports_non_stop
!= NULL
));
342 install_delegators (t
);
345 /* This is used to implement the various target commands. */
348 open_target (char *args
, int from_tty
, struct cmd_list_element
*command
)
350 struct target_ops
*ops
= (struct target_ops
*) get_cmd_context (command
);
353 fprintf_unfiltered (gdb_stdlog
, "-> %s->to_open (...)\n",
356 ops
->to_open (args
, from_tty
);
359 fprintf_unfiltered (gdb_stdlog
, "<- %s->to_open (%s, %d)\n",
360 ops
->to_shortname
, args
, from_tty
);
363 /* Add possible target architecture T to the list and add a new
364 command 'target T->to_shortname'. Set COMPLETER as the command's
365 completer if not NULL. */
368 add_target_with_completer (struct target_ops
*t
,
369 completer_ftype
*completer
)
371 struct cmd_list_element
*c
;
373 complete_target_initialization (t
);
375 VEC_safe_push (target_ops_p
, target_structs
, t
);
377 if (targetlist
== NULL
)
378 add_prefix_cmd ("target", class_run
, target_command
, _("\
379 Connect to a target machine or process.\n\
380 The first argument is the type or protocol of the target machine.\n\
381 Remaining arguments are interpreted by the target protocol. For more\n\
382 information on the arguments for a particular protocol, type\n\
383 `help target ' followed by the protocol name."),
384 &targetlist
, "target ", 0, &cmdlist
);
385 c
= add_cmd (t
->to_shortname
, no_class
, NULL
, t
->to_doc
, &targetlist
);
386 set_cmd_sfunc (c
, open_target
);
387 set_cmd_context (c
, t
);
388 if (completer
!= NULL
)
389 set_cmd_completer (c
, completer
);
392 /* Add a possible target architecture to the list. */
395 add_target (struct target_ops
*t
)
397 add_target_with_completer (t
, NULL
);
403 add_deprecated_target_alias (struct target_ops
*t
, char *alias
)
405 struct cmd_list_element
*c
;
408 /* If we use add_alias_cmd, here, we do not get the deprecated warning,
410 c
= add_cmd (alias
, no_class
, NULL
, t
->to_doc
, &targetlist
);
411 set_cmd_sfunc (c
, open_target
);
412 set_cmd_context (c
, t
);
413 alt
= xstrprintf ("target %s", t
->to_shortname
);
414 deprecate_cmd (c
, alt
);
422 current_target
.to_kill (¤t_target
);
426 target_load (const char *arg
, int from_tty
)
428 target_dcache_invalidate ();
429 (*current_target
.to_load
) (¤t_target
, arg
, from_tty
);
432 /* Possible terminal states. */
436 /* The inferior's terminal settings are in effect. */
437 terminal_is_inferior
= 0,
439 /* Some of our terminal settings are in effect, enough to get
441 terminal_is_ours_for_output
= 1,
443 /* Our terminal settings are in effect, for output and input. */
447 static enum terminal_state terminal_state
= terminal_is_ours
;
452 target_terminal_init (void)
454 (*current_target
.to_terminal_init
) (¤t_target
);
456 terminal_state
= terminal_is_ours
;
462 target_terminal_is_inferior (void)
464 return (terminal_state
== terminal_is_inferior
);
470 target_terminal_is_ours (void)
472 return (terminal_state
== terminal_is_ours
);
478 target_terminal_inferior (void)
480 /* A background resume (``run&'') should leave GDB in control of the
481 terminal. Use target_can_async_p, not target_is_async_p, since at
482 this point the target is not async yet. However, if sync_execution
483 is not set, we know it will become async prior to resume. */
484 if (target_can_async_p () && !sync_execution
)
487 if (terminal_state
== terminal_is_inferior
)
490 /* If GDB is resuming the inferior in the foreground, install
491 inferior's terminal modes. */
492 (*current_target
.to_terminal_inferior
) (¤t_target
);
493 terminal_state
= terminal_is_inferior
;
495 /* If the user hit C-c before, pretend that it was hit right
497 if (check_quit_flag ())
498 target_pass_ctrlc ();
504 target_terminal_ours (void)
506 if (terminal_state
== terminal_is_ours
)
509 (*current_target
.to_terminal_ours
) (¤t_target
);
510 terminal_state
= terminal_is_ours
;
516 target_terminal_ours_for_output (void)
518 if (terminal_state
!= terminal_is_inferior
)
520 (*current_target
.to_terminal_ours_for_output
) (¤t_target
);
521 terminal_state
= terminal_is_ours_for_output
;
527 target_supports_terminal_ours (void)
529 struct target_ops
*t
;
531 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
533 if (t
->to_terminal_ours
!= delegate_terminal_ours
534 && t
->to_terminal_ours
!= tdefault_terminal_ours
)
541 /* Restore the terminal to its previous state (helper for
542 make_cleanup_restore_target_terminal). */
545 cleanup_restore_target_terminal (void *arg
)
547 enum terminal_state
*previous_state
= (enum terminal_state
*) arg
;
549 switch (*previous_state
)
551 case terminal_is_ours
:
552 target_terminal_ours ();
554 case terminal_is_ours_for_output
:
555 target_terminal_ours_for_output ();
557 case terminal_is_inferior
:
558 target_terminal_inferior ();
566 make_cleanup_restore_target_terminal (void)
568 enum terminal_state
*ts
= XNEW (enum terminal_state
);
570 *ts
= terminal_state
;
572 return make_cleanup_dtor (cleanup_restore_target_terminal
, ts
, xfree
);
578 error (_("You can't do that when your target is `%s'"),
579 current_target
.to_shortname
);
585 error (_("You can't do that without a process to debug."));
589 default_terminal_info (struct target_ops
*self
, const char *args
, int from_tty
)
591 printf_unfiltered (_("No saved terminal information.\n"));
594 /* A default implementation for the to_get_ada_task_ptid target method.
596 This function builds the PTID by using both LWP and TID as part of
597 the PTID lwp and tid elements. The pid used is the pid of the
601 default_get_ada_task_ptid (struct target_ops
*self
, long lwp
, long tid
)
603 return ptid_build (ptid_get_pid (inferior_ptid
), lwp
, tid
);
606 static enum exec_direction_kind
607 default_execution_direction (struct target_ops
*self
)
609 if (!target_can_execute_reverse
)
611 else if (!target_can_async_p ())
614 gdb_assert_not_reached ("\
615 to_execution_direction must be implemented for reverse async");
618 /* Go through the target stack from top to bottom, copying over zero
619 entries in current_target, then filling in still empty entries. In
620 effect, we are doing class inheritance through the pushed target
623 NOTE: cagney/2003-10-17: The problem with this inheritance, as it
624 is currently implemented, is that it discards any knowledge of
625 which target an inherited method originally belonged to.
626 Consequently, new new target methods should instead explicitly and
627 locally search the target stack for the target that can handle the
631 update_current_target (void)
633 struct target_ops
*t
;
635 /* First, reset current's contents. */
636 memset (¤t_target
, 0, sizeof (current_target
));
638 /* Install the delegators. */
639 install_delegators (¤t_target
);
641 current_target
.to_stratum
= target_stack
->to_stratum
;
643 #define INHERIT(FIELD, TARGET) \
644 if (!current_target.FIELD) \
645 current_target.FIELD = (TARGET)->FIELD
647 /* Do not add any new INHERITs here. Instead, use the delegation
648 mechanism provided by make-target-delegates. */
649 for (t
= target_stack
; t
; t
= t
->beneath
)
651 INHERIT (to_shortname
, t
);
652 INHERIT (to_longname
, t
);
653 INHERIT (to_attach_no_wait
, t
);
654 INHERIT (to_have_steppable_watchpoint
, t
);
655 INHERIT (to_have_continuable_watchpoint
, t
);
656 INHERIT (to_has_thread_control
, t
);
660 /* Finally, position the target-stack beneath the squashed
661 "current_target". That way code looking for a non-inherited
662 target method can quickly and simply find it. */
663 current_target
.beneath
= target_stack
;
666 setup_target_debug ();
669 /* Push a new target type into the stack of the existing target accessors,
670 possibly superseding some of the existing accessors.
672 Rather than allow an empty stack, we always have the dummy target at
673 the bottom stratum, so we can call the function vectors without
677 push_target (struct target_ops
*t
)
679 struct target_ops
**cur
;
681 /* Check magic number. If wrong, it probably means someone changed
682 the struct definition, but not all the places that initialize one. */
683 if (t
->to_magic
!= OPS_MAGIC
)
685 fprintf_unfiltered (gdb_stderr
,
686 "Magic number of %s target struct wrong\n",
688 internal_error (__FILE__
, __LINE__
,
689 _("failed internal consistency check"));
692 /* Find the proper stratum to install this target in. */
693 for (cur
= &target_stack
; (*cur
) != NULL
; cur
= &(*cur
)->beneath
)
695 if ((int) (t
->to_stratum
) >= (int) (*cur
)->to_stratum
)
699 /* If there's already targets at this stratum, remove them. */
700 /* FIXME: cagney/2003-10-15: I think this should be popping all
701 targets to CUR, and not just those at this stratum level. */
702 while ((*cur
) != NULL
&& t
->to_stratum
== (*cur
)->to_stratum
)
704 /* There's already something at this stratum level. Close it,
705 and un-hook it from the stack. */
706 struct target_ops
*tmp
= (*cur
);
708 (*cur
) = (*cur
)->beneath
;
713 /* We have removed all targets in our stratum, now add the new one. */
717 update_current_target ();
720 /* Remove a target_ops vector from the stack, wherever it may be.
721 Return how many times it was removed (0 or 1). */
724 unpush_target (struct target_ops
*t
)
726 struct target_ops
**cur
;
727 struct target_ops
*tmp
;
729 if (t
->to_stratum
== dummy_stratum
)
730 internal_error (__FILE__
, __LINE__
,
731 _("Attempt to unpush the dummy target"));
733 /* Look for the specified target. Note that we assume that a target
734 can only occur once in the target stack. */
736 for (cur
= &target_stack
; (*cur
) != NULL
; cur
= &(*cur
)->beneath
)
742 /* If we don't find target_ops, quit. Only open targets should be
747 /* Unchain the target. */
749 (*cur
) = (*cur
)->beneath
;
752 update_current_target ();
754 /* Finally close the target. Note we do this after unchaining, so
755 any target method calls from within the target_close
756 implementation don't end up in T anymore. */
762 /* Unpush TARGET and assert that it worked. */
765 unpush_target_and_assert (struct target_ops
*target
)
767 if (!unpush_target (target
))
769 fprintf_unfiltered (gdb_stderr
,
770 "pop_all_targets couldn't find target %s\n",
771 target
->to_shortname
);
772 internal_error (__FILE__
, __LINE__
,
773 _("failed internal consistency check"));
778 pop_all_targets_above (enum strata above_stratum
)
780 while ((int) (current_target
.to_stratum
) > (int) above_stratum
)
781 unpush_target_and_assert (target_stack
);
787 pop_all_targets_at_and_above (enum strata stratum
)
789 while ((int) (current_target
.to_stratum
) >= (int) stratum
)
790 unpush_target_and_assert (target_stack
);
794 pop_all_targets (void)
796 pop_all_targets_above (dummy_stratum
);
799 /* Return 1 if T is now pushed in the target stack. Return 0 otherwise. */
802 target_is_pushed (struct target_ops
*t
)
804 struct target_ops
*cur
;
806 /* Check magic number. If wrong, it probably means someone changed
807 the struct definition, but not all the places that initialize one. */
808 if (t
->to_magic
!= OPS_MAGIC
)
810 fprintf_unfiltered (gdb_stderr
,
811 "Magic number of %s target struct wrong\n",
813 internal_error (__FILE__
, __LINE__
,
814 _("failed internal consistency check"));
817 for (cur
= target_stack
; cur
!= NULL
; cur
= cur
->beneath
)
824 /* Default implementation of to_get_thread_local_address. */
827 generic_tls_error (void)
829 throw_error (TLS_GENERIC_ERROR
,
830 _("Cannot find thread-local variables on this target"));
833 /* Using the objfile specified in OBJFILE, find the address for the
834 current thread's thread-local storage with offset OFFSET. */
836 target_translate_tls_address (struct objfile
*objfile
, CORE_ADDR offset
)
838 volatile CORE_ADDR addr
= 0;
839 struct target_ops
*target
= ¤t_target
;
841 if (gdbarch_fetch_tls_load_module_address_p (target_gdbarch ()))
843 ptid_t ptid
= inferior_ptid
;
849 /* Fetch the load module address for this objfile. */
850 lm_addr
= gdbarch_fetch_tls_load_module_address (target_gdbarch (),
853 addr
= target
->to_get_thread_local_address (target
, ptid
,
856 /* If an error occurred, print TLS related messages here. Otherwise,
857 throw the error to some higher catcher. */
858 CATCH (ex
, RETURN_MASK_ALL
)
860 int objfile_is_library
= (objfile
->flags
& OBJF_SHARED
);
864 case TLS_NO_LIBRARY_SUPPORT_ERROR
:
865 error (_("Cannot find thread-local variables "
866 "in this thread library."));
868 case TLS_LOAD_MODULE_NOT_FOUND_ERROR
:
869 if (objfile_is_library
)
870 error (_("Cannot find shared library `%s' in dynamic"
871 " linker's load module list"), objfile_name (objfile
));
873 error (_("Cannot find executable file `%s' in dynamic"
874 " linker's load module list"), objfile_name (objfile
));
876 case TLS_NOT_ALLOCATED_YET_ERROR
:
877 if (objfile_is_library
)
878 error (_("The inferior has not yet allocated storage for"
879 " thread-local variables in\n"
880 "the shared library `%s'\n"
882 objfile_name (objfile
), target_pid_to_str (ptid
));
884 error (_("The inferior has not yet allocated storage for"
885 " thread-local variables in\n"
886 "the executable `%s'\n"
888 objfile_name (objfile
), target_pid_to_str (ptid
));
890 case TLS_GENERIC_ERROR
:
891 if (objfile_is_library
)
892 error (_("Cannot find thread-local storage for %s, "
893 "shared library %s:\n%s"),
894 target_pid_to_str (ptid
),
895 objfile_name (objfile
), ex
.message
);
897 error (_("Cannot find thread-local storage for %s, "
898 "executable file %s:\n%s"),
899 target_pid_to_str (ptid
),
900 objfile_name (objfile
), ex
.message
);
903 throw_exception (ex
);
909 /* It wouldn't be wrong here to try a gdbarch method, too; finding
910 TLS is an ABI-specific thing. But we don't do that yet. */
912 error (_("Cannot find thread-local variables on this target"));
918 target_xfer_status_to_string (enum target_xfer_status status
)
920 #define CASE(X) case X: return #X
923 CASE(TARGET_XFER_E_IO
);
924 CASE(TARGET_XFER_UNAVAILABLE
);
933 #define MIN(A, B) (((A) <= (B)) ? (A) : (B))
935 /* target_read_string -- read a null terminated string, up to LEN bytes,
936 from MEMADDR in target. Set *ERRNOP to the errno code, or 0 if successful.
937 Set *STRING to a pointer to malloc'd memory containing the data; the caller
938 is responsible for freeing it. Return the number of bytes successfully
942 target_read_string (CORE_ADDR memaddr
, char **string
, int len
, int *errnop
)
948 int buffer_allocated
;
950 unsigned int nbytes_read
= 0;
954 /* Small for testing. */
955 buffer_allocated
= 4;
956 buffer
= (char *) xmalloc (buffer_allocated
);
961 tlen
= MIN (len
, 4 - (memaddr
& 3));
962 offset
= memaddr
& 3;
964 errcode
= target_read_memory (memaddr
& ~3, buf
, sizeof buf
);
967 /* The transfer request might have crossed the boundary to an
968 unallocated region of memory. Retry the transfer, requesting
972 errcode
= target_read_memory (memaddr
, buf
, 1);
977 if (bufptr
- buffer
+ tlen
> buffer_allocated
)
981 bytes
= bufptr
- buffer
;
982 buffer_allocated
*= 2;
983 buffer
= (char *) xrealloc (buffer
, buffer_allocated
);
984 bufptr
= buffer
+ bytes
;
987 for (i
= 0; i
< tlen
; i
++)
989 *bufptr
++ = buf
[i
+ offset
];
990 if (buf
[i
+ offset
] == '\000')
992 nbytes_read
+= i
+ 1;
1008 struct target_section_table
*
1009 target_get_section_table (struct target_ops
*target
)
1011 return (*target
->to_get_section_table
) (target
);
1014 /* Find a section containing ADDR. */
1016 struct target_section
*
1017 target_section_by_addr (struct target_ops
*target
, CORE_ADDR addr
)
1019 struct target_section_table
*table
= target_get_section_table (target
);
1020 struct target_section
*secp
;
1025 for (secp
= table
->sections
; secp
< table
->sections_end
; secp
++)
1027 if (addr
>= secp
->addr
&& addr
< secp
->endaddr
)
1034 /* Helper for the memory xfer routines. Checks the attributes of the
1035 memory region of MEMADDR against the read or write being attempted.
1036 If the access is permitted returns true, otherwise returns false.
1037 REGION_P is an optional output parameter. If not-NULL, it is
1038 filled with a pointer to the memory region of MEMADDR. REG_LEN
1039 returns LEN trimmed to the end of the region. This is how much the
1040 caller can continue requesting, if the access is permitted. A
1041 single xfer request must not straddle memory region boundaries. */
1044 memory_xfer_check_region (gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1045 ULONGEST memaddr
, ULONGEST len
, ULONGEST
*reg_len
,
1046 struct mem_region
**region_p
)
1048 struct mem_region
*region
;
1050 region
= lookup_mem_region (memaddr
);
1052 if (region_p
!= NULL
)
1055 switch (region
->attrib
.mode
)
1058 if (writebuf
!= NULL
)
1063 if (readbuf
!= NULL
)
1068 /* We only support writing to flash during "load" for now. */
1069 if (writebuf
!= NULL
)
1070 error (_("Writing to flash memory forbidden in this context"));
1077 /* region->hi == 0 means there's no upper bound. */
1078 if (memaddr
+ len
< region
->hi
|| region
->hi
== 0)
1081 *reg_len
= region
->hi
- memaddr
;
1086 /* Read memory from more than one valid target. A core file, for
1087 instance, could have some of memory but delegate other bits to
1088 the target below it. So, we must manually try all targets. */
1090 enum target_xfer_status
1091 raw_memory_xfer_partial (struct target_ops
*ops
, gdb_byte
*readbuf
,
1092 const gdb_byte
*writebuf
, ULONGEST memaddr
, LONGEST len
,
1093 ULONGEST
*xfered_len
)
1095 enum target_xfer_status res
;
1099 res
= ops
->to_xfer_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1100 readbuf
, writebuf
, memaddr
, len
,
1102 if (res
== TARGET_XFER_OK
)
1105 /* Stop if the target reports that the memory is not available. */
1106 if (res
== TARGET_XFER_UNAVAILABLE
)
1109 /* We want to continue past core files to executables, but not
1110 past a running target's memory. */
1111 if (ops
->to_has_all_memory (ops
))
1116 while (ops
!= NULL
);
1118 /* The cache works at the raw memory level. Make sure the cache
1119 gets updated with raw contents no matter what kind of memory
1120 object was originally being written. Note we do write-through
1121 first, so that if it fails, we don't write to the cache contents
1122 that never made it to the target. */
1123 if (writebuf
!= NULL
1124 && !ptid_equal (inferior_ptid
, null_ptid
)
1125 && target_dcache_init_p ()
1126 && (stack_cache_enabled_p () || code_cache_enabled_p ()))
1128 DCACHE
*dcache
= target_dcache_get ();
1130 /* Note that writing to an area of memory which wasn't present
1131 in the cache doesn't cause it to be loaded in. */
1132 dcache_update (dcache
, res
, memaddr
, writebuf
, *xfered_len
);
1138 /* Perform a partial memory transfer.
1139 For docs see target.h, to_xfer_partial. */
1141 static enum target_xfer_status
1142 memory_xfer_partial_1 (struct target_ops
*ops
, enum target_object object
,
1143 gdb_byte
*readbuf
, const gdb_byte
*writebuf
, ULONGEST memaddr
,
1144 ULONGEST len
, ULONGEST
*xfered_len
)
1146 enum target_xfer_status res
;
1148 struct mem_region
*region
;
1149 struct inferior
*inf
;
1151 /* For accesses to unmapped overlay sections, read directly from
1152 files. Must do this first, as MEMADDR may need adjustment. */
1153 if (readbuf
!= NULL
&& overlay_debugging
)
1155 struct obj_section
*section
= find_pc_overlay (memaddr
);
1157 if (pc_in_unmapped_range (memaddr
, section
))
1159 struct target_section_table
*table
1160 = target_get_section_table (ops
);
1161 const char *section_name
= section
->the_bfd_section
->name
;
1163 memaddr
= overlay_mapped_address (memaddr
, section
);
1164 return section_table_xfer_memory_partial (readbuf
, writebuf
,
1165 memaddr
, len
, xfered_len
,
1167 table
->sections_end
,
1172 /* Try the executable files, if "trust-readonly-sections" is set. */
1173 if (readbuf
!= NULL
&& trust_readonly
)
1175 struct target_section
*secp
;
1176 struct target_section_table
*table
;
1178 secp
= target_section_by_addr (ops
, memaddr
);
1180 && (bfd_get_section_flags (secp
->the_bfd_section
->owner
,
1181 secp
->the_bfd_section
)
1184 table
= target_get_section_table (ops
);
1185 return section_table_xfer_memory_partial (readbuf
, writebuf
,
1186 memaddr
, len
, xfered_len
,
1188 table
->sections_end
,
1193 /* Try GDB's internal data cache. */
1195 if (!memory_xfer_check_region (readbuf
, writebuf
, memaddr
, len
, ®_len
,
1197 return TARGET_XFER_E_IO
;
1199 if (!ptid_equal (inferior_ptid
, null_ptid
))
1200 inf
= find_inferior_ptid (inferior_ptid
);
1206 /* The dcache reads whole cache lines; that doesn't play well
1207 with reading from a trace buffer, because reading outside of
1208 the collected memory range fails. */
1209 && get_traceframe_number () == -1
1210 && (region
->attrib
.cache
1211 || (stack_cache_enabled_p () && object
== TARGET_OBJECT_STACK_MEMORY
)
1212 || (code_cache_enabled_p () && object
== TARGET_OBJECT_CODE_MEMORY
)))
1214 DCACHE
*dcache
= target_dcache_get_or_init ();
1216 return dcache_read_memory_partial (ops
, dcache
, memaddr
, readbuf
,
1217 reg_len
, xfered_len
);
1220 /* If none of those methods found the memory we wanted, fall back
1221 to a target partial transfer. Normally a single call to
1222 to_xfer_partial is enough; if it doesn't recognize an object
1223 it will call the to_xfer_partial of the next target down.
1224 But for memory this won't do. Memory is the only target
1225 object which can be read from more than one valid target.
1226 A core file, for instance, could have some of memory but
1227 delegate other bits to the target below it. So, we must
1228 manually try all targets. */
1230 res
= raw_memory_xfer_partial (ops
, readbuf
, writebuf
, memaddr
, reg_len
,
1233 /* If we still haven't got anything, return the last error. We
1238 /* Perform a partial memory transfer. For docs see target.h,
1241 static enum target_xfer_status
1242 memory_xfer_partial (struct target_ops
*ops
, enum target_object object
,
1243 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1244 ULONGEST memaddr
, ULONGEST len
, ULONGEST
*xfered_len
)
1246 enum target_xfer_status res
;
1248 /* Zero length requests are ok and require no work. */
1250 return TARGET_XFER_EOF
;
1252 /* Fill in READBUF with breakpoint shadows, or WRITEBUF with
1253 breakpoint insns, thus hiding out from higher layers whether
1254 there are software breakpoints inserted in the code stream. */
1255 if (readbuf
!= NULL
)
1257 res
= memory_xfer_partial_1 (ops
, object
, readbuf
, NULL
, memaddr
, len
,
1260 if (res
== TARGET_XFER_OK
&& !show_memory_breakpoints
)
1261 breakpoint_xfer_memory (readbuf
, NULL
, NULL
, memaddr
, *xfered_len
);
1266 struct cleanup
*old_chain
;
1268 /* A large write request is likely to be partially satisfied
1269 by memory_xfer_partial_1. We will continually malloc
1270 and free a copy of the entire write request for breakpoint
1271 shadow handling even though we only end up writing a small
1272 subset of it. Cap writes to 4KB to mitigate this. */
1273 len
= min (4096, len
);
1275 buf
= (gdb_byte
*) xmalloc (len
);
1276 old_chain
= make_cleanup (xfree
, buf
);
1277 memcpy (buf
, writebuf
, len
);
1279 breakpoint_xfer_memory (NULL
, buf
, writebuf
, memaddr
, len
);
1280 res
= memory_xfer_partial_1 (ops
, object
, NULL
, buf
, memaddr
, len
,
1283 do_cleanups (old_chain
);
1290 restore_show_memory_breakpoints (void *arg
)
1292 show_memory_breakpoints
= (uintptr_t) arg
;
1296 make_show_memory_breakpoints_cleanup (int show
)
1298 int current
= show_memory_breakpoints
;
1300 show_memory_breakpoints
= show
;
1301 return make_cleanup (restore_show_memory_breakpoints
,
1302 (void *) (uintptr_t) current
);
1305 /* For docs see target.h, to_xfer_partial. */
1307 enum target_xfer_status
1308 target_xfer_partial (struct target_ops
*ops
,
1309 enum target_object object
, const char *annex
,
1310 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1311 ULONGEST offset
, ULONGEST len
,
1312 ULONGEST
*xfered_len
)
1314 enum target_xfer_status retval
;
1316 gdb_assert (ops
->to_xfer_partial
!= NULL
);
1318 /* Transfer is done when LEN is zero. */
1320 return TARGET_XFER_EOF
;
1322 if (writebuf
&& !may_write_memory
)
1323 error (_("Writing to memory is not allowed (addr %s, len %s)"),
1324 core_addr_to_string_nz (offset
), plongest (len
));
1328 /* If this is a memory transfer, let the memory-specific code
1329 have a look at it instead. Memory transfers are more
1331 if (object
== TARGET_OBJECT_MEMORY
|| object
== TARGET_OBJECT_STACK_MEMORY
1332 || object
== TARGET_OBJECT_CODE_MEMORY
)
1333 retval
= memory_xfer_partial (ops
, object
, readbuf
,
1334 writebuf
, offset
, len
, xfered_len
);
1335 else if (object
== TARGET_OBJECT_RAW_MEMORY
)
1337 /* Skip/avoid accessing the target if the memory region
1338 attributes block the access. Check this here instead of in
1339 raw_memory_xfer_partial as otherwise we'd end up checking
1340 this twice in the case of the memory_xfer_partial path is
1341 taken; once before checking the dcache, and another in the
1342 tail call to raw_memory_xfer_partial. */
1343 if (!memory_xfer_check_region (readbuf
, writebuf
, offset
, len
, &len
,
1345 return TARGET_XFER_E_IO
;
1347 /* Request the normal memory object from other layers. */
1348 retval
= raw_memory_xfer_partial (ops
, readbuf
, writebuf
, offset
, len
,
1352 retval
= ops
->to_xfer_partial (ops
, object
, annex
, readbuf
,
1353 writebuf
, offset
, len
, xfered_len
);
1357 const unsigned char *myaddr
= NULL
;
1359 fprintf_unfiltered (gdb_stdlog
,
1360 "%s:target_xfer_partial "
1361 "(%d, %s, %s, %s, %s, %s) = %d, %s",
1364 (annex
? annex
: "(null)"),
1365 host_address_to_string (readbuf
),
1366 host_address_to_string (writebuf
),
1367 core_addr_to_string_nz (offset
),
1368 pulongest (len
), retval
,
1369 pulongest (*xfered_len
));
1375 if (retval
== TARGET_XFER_OK
&& myaddr
!= NULL
)
1379 fputs_unfiltered (", bytes =", gdb_stdlog
);
1380 for (i
= 0; i
< *xfered_len
; i
++)
1382 if ((((intptr_t) &(myaddr
[i
])) & 0xf) == 0)
1384 if (targetdebug
< 2 && i
> 0)
1386 fprintf_unfiltered (gdb_stdlog
, " ...");
1389 fprintf_unfiltered (gdb_stdlog
, "\n");
1392 fprintf_unfiltered (gdb_stdlog
, " %02x", myaddr
[i
] & 0xff);
1396 fputc_unfiltered ('\n', gdb_stdlog
);
1399 /* Check implementations of to_xfer_partial update *XFERED_LEN
1400 properly. Do assertion after printing debug messages, so that we
1401 can find more clues on assertion failure from debugging messages. */
1402 if (retval
== TARGET_XFER_OK
|| retval
== TARGET_XFER_UNAVAILABLE
)
1403 gdb_assert (*xfered_len
> 0);
1408 /* Read LEN bytes of target memory at address MEMADDR, placing the
1409 results in GDB's memory at MYADDR. Returns either 0 for success or
1410 -1 if any error occurs.
1412 If an error occurs, no guarantee is made about the contents of the data at
1413 MYADDR. In particular, the caller should not depend upon partial reads
1414 filling the buffer with good data. There is no way for the caller to know
1415 how much good data might have been transfered anyway. Callers that can
1416 deal with partial reads should call target_read (which will retry until
1417 it makes no progress, and then return how much was transferred). */
1420 target_read_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1422 /* Dispatch to the topmost target, not the flattened current_target.
1423 Memory accesses check target->to_has_(all_)memory, and the
1424 flattened target doesn't inherit those. */
1425 if (target_read (current_target
.beneath
, TARGET_OBJECT_MEMORY
, NULL
,
1426 myaddr
, memaddr
, len
) == len
)
1432 /* See target/target.h. */
1435 target_read_uint32 (CORE_ADDR memaddr
, uint32_t *result
)
1440 r
= target_read_memory (memaddr
, buf
, sizeof buf
);
1443 *result
= extract_unsigned_integer (buf
, sizeof buf
,
1444 gdbarch_byte_order (target_gdbarch ()));
1448 /* Like target_read_memory, but specify explicitly that this is a read
1449 from the target's raw memory. That is, this read bypasses the
1450 dcache, breakpoint shadowing, etc. */
1453 target_read_raw_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1455 /* See comment in target_read_memory about why the request starts at
1456 current_target.beneath. */
1457 if (target_read (current_target
.beneath
, TARGET_OBJECT_RAW_MEMORY
, NULL
,
1458 myaddr
, memaddr
, len
) == len
)
1464 /* Like target_read_memory, but specify explicitly that this is a read from
1465 the target's stack. This may trigger different cache behavior. */
1468 target_read_stack (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1470 /* See comment in target_read_memory about why the request starts at
1471 current_target.beneath. */
1472 if (target_read (current_target
.beneath
, TARGET_OBJECT_STACK_MEMORY
, NULL
,
1473 myaddr
, memaddr
, len
) == len
)
1479 /* Like target_read_memory, but specify explicitly that this is a read from
1480 the target's code. This may trigger different cache behavior. */
1483 target_read_code (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1485 /* See comment in target_read_memory about why the request starts at
1486 current_target.beneath. */
1487 if (target_read (current_target
.beneath
, TARGET_OBJECT_CODE_MEMORY
, NULL
,
1488 myaddr
, memaddr
, len
) == len
)
1494 /* Write LEN bytes from MYADDR to target memory at address MEMADDR.
1495 Returns either 0 for success or -1 if any error occurs. If an
1496 error occurs, no guarantee is made about how much data got written.
1497 Callers that can deal with partial writes should call
1501 target_write_memory (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ssize_t len
)
1503 /* See comment in target_read_memory about why the request starts at
1504 current_target.beneath. */
1505 if (target_write (current_target
.beneath
, TARGET_OBJECT_MEMORY
, NULL
,
1506 myaddr
, memaddr
, len
) == len
)
1512 /* Write LEN bytes from MYADDR to target raw memory at address
1513 MEMADDR. Returns either 0 for success or -1 if any error occurs.
1514 If an error occurs, no guarantee is made about how much data got
1515 written. Callers that can deal with partial writes should call
1519 target_write_raw_memory (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ssize_t len
)
1521 /* See comment in target_read_memory about why the request starts at
1522 current_target.beneath. */
1523 if (target_write (current_target
.beneath
, TARGET_OBJECT_RAW_MEMORY
, NULL
,
1524 myaddr
, memaddr
, len
) == len
)
1530 /* Fetch the target's memory map. */
1533 target_memory_map (void)
1535 VEC(mem_region_s
) *result
;
1536 struct mem_region
*last_one
, *this_one
;
1538 result
= current_target
.to_memory_map (¤t_target
);
1542 qsort (VEC_address (mem_region_s
, result
),
1543 VEC_length (mem_region_s
, result
),
1544 sizeof (struct mem_region
), mem_region_cmp
);
1546 /* Check that regions do not overlap. Simultaneously assign
1547 a numbering for the "mem" commands to use to refer to
1550 for (ix
= 0; VEC_iterate (mem_region_s
, result
, ix
, this_one
); ix
++)
1552 this_one
->number
= ix
;
1554 if (last_one
&& last_one
->hi
> this_one
->lo
)
1556 warning (_("Overlapping regions in memory map: ignoring"));
1557 VEC_free (mem_region_s
, result
);
1560 last_one
= this_one
;
1567 target_flash_erase (ULONGEST address
, LONGEST length
)
1569 current_target
.to_flash_erase (¤t_target
, address
, length
);
1573 target_flash_done (void)
1575 current_target
.to_flash_done (¤t_target
);
1579 show_trust_readonly (struct ui_file
*file
, int from_tty
,
1580 struct cmd_list_element
*c
, const char *value
)
1582 fprintf_filtered (file
,
1583 _("Mode for reading from readonly sections is %s.\n"),
1587 /* Target vector read/write partial wrapper functions. */
1589 static enum target_xfer_status
1590 target_read_partial (struct target_ops
*ops
,
1591 enum target_object object
,
1592 const char *annex
, gdb_byte
*buf
,
1593 ULONGEST offset
, ULONGEST len
,
1594 ULONGEST
*xfered_len
)
1596 return target_xfer_partial (ops
, object
, annex
, buf
, NULL
, offset
, len
,
1600 static enum target_xfer_status
1601 target_write_partial (struct target_ops
*ops
,
1602 enum target_object object
,
1603 const char *annex
, const gdb_byte
*buf
,
1604 ULONGEST offset
, LONGEST len
, ULONGEST
*xfered_len
)
1606 return target_xfer_partial (ops
, object
, annex
, NULL
, buf
, offset
, len
,
1610 /* Wrappers to perform the full transfer. */
1612 /* For docs on target_read see target.h. */
1615 target_read (struct target_ops
*ops
,
1616 enum target_object object
,
1617 const char *annex
, gdb_byte
*buf
,
1618 ULONGEST offset
, LONGEST len
)
1620 LONGEST xfered_total
= 0;
1623 /* If we are reading from a memory object, find the length of an addressable
1624 unit for that architecture. */
1625 if (object
== TARGET_OBJECT_MEMORY
1626 || object
== TARGET_OBJECT_STACK_MEMORY
1627 || object
== TARGET_OBJECT_CODE_MEMORY
1628 || object
== TARGET_OBJECT_RAW_MEMORY
)
1629 unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
1631 while (xfered_total
< len
)
1633 ULONGEST xfered_partial
;
1634 enum target_xfer_status status
;
1636 status
= target_read_partial (ops
, object
, annex
,
1637 buf
+ xfered_total
* unit_size
,
1638 offset
+ xfered_total
, len
- xfered_total
,
1641 /* Call an observer, notifying them of the xfer progress? */
1642 if (status
== TARGET_XFER_EOF
)
1643 return xfered_total
;
1644 else if (status
== TARGET_XFER_OK
)
1646 xfered_total
+= xfered_partial
;
1650 return TARGET_XFER_E_IO
;
1656 /* Assuming that the entire [begin, end) range of memory cannot be
1657 read, try to read whatever subrange is possible to read.
1659 The function returns, in RESULT, either zero or one memory block.
1660 If there's a readable subrange at the beginning, it is completely
1661 read and returned. Any further readable subrange will not be read.
1662 Otherwise, if there's a readable subrange at the end, it will be
1663 completely read and returned. Any readable subranges before it
1664 (obviously, not starting at the beginning), will be ignored. In
1665 other cases -- either no readable subrange, or readable subrange(s)
1666 that is neither at the beginning, or end, nothing is returned.
1668 The purpose of this function is to handle a read across a boundary
1669 of accessible memory in a case when memory map is not available.
1670 The above restrictions are fine for this case, but will give
1671 incorrect results if the memory is 'patchy'. However, supporting
1672 'patchy' memory would require trying to read every single byte,
1673 and it seems unacceptable solution. Explicit memory map is
1674 recommended for this case -- and target_read_memory_robust will
1675 take care of reading multiple ranges then. */
1678 read_whatever_is_readable (struct target_ops
*ops
,
1679 const ULONGEST begin
, const ULONGEST end
,
1681 VEC(memory_read_result_s
) **result
)
1683 gdb_byte
*buf
= (gdb_byte
*) xmalloc (end
- begin
);
1684 ULONGEST current_begin
= begin
;
1685 ULONGEST current_end
= end
;
1687 memory_read_result_s r
;
1688 ULONGEST xfered_len
;
1690 /* If we previously failed to read 1 byte, nothing can be done here. */
1691 if (end
- begin
<= 1)
1697 /* Check that either first or the last byte is readable, and give up
1698 if not. This heuristic is meant to permit reading accessible memory
1699 at the boundary of accessible region. */
1700 if (target_read_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1701 buf
, begin
, 1, &xfered_len
) == TARGET_XFER_OK
)
1706 else if (target_read_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1707 buf
+ (end
- begin
) - 1, end
- 1, 1,
1708 &xfered_len
) == TARGET_XFER_OK
)
1719 /* Loop invariant is that the [current_begin, current_end) was previously
1720 found to be not readable as a whole.
1722 Note loop condition -- if the range has 1 byte, we can't divide the range
1723 so there's no point trying further. */
1724 while (current_end
- current_begin
> 1)
1726 ULONGEST first_half_begin
, first_half_end
;
1727 ULONGEST second_half_begin
, second_half_end
;
1729 ULONGEST middle
= current_begin
+ (current_end
- current_begin
) / 2;
1733 first_half_begin
= current_begin
;
1734 first_half_end
= middle
;
1735 second_half_begin
= middle
;
1736 second_half_end
= current_end
;
1740 first_half_begin
= middle
;
1741 first_half_end
= current_end
;
1742 second_half_begin
= current_begin
;
1743 second_half_end
= middle
;
1746 xfer
= target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1747 buf
+ (first_half_begin
- begin
) * unit_size
,
1749 first_half_end
- first_half_begin
);
1751 if (xfer
== first_half_end
- first_half_begin
)
1753 /* This half reads up fine. So, the error must be in the
1755 current_begin
= second_half_begin
;
1756 current_end
= second_half_end
;
1760 /* This half is not readable. Because we've tried one byte, we
1761 know some part of this half if actually readable. Go to the next
1762 iteration to divide again and try to read.
1764 We don't handle the other half, because this function only tries
1765 to read a single readable subrange. */
1766 current_begin
= first_half_begin
;
1767 current_end
= first_half_end
;
1773 /* The [begin, current_begin) range has been read. */
1775 r
.end
= current_begin
;
1780 /* The [current_end, end) range has been read. */
1781 LONGEST region_len
= end
- current_end
;
1783 r
.data
= (gdb_byte
*) xmalloc (region_len
* unit_size
);
1784 memcpy (r
.data
, buf
+ (current_end
- begin
) * unit_size
,
1785 region_len
* unit_size
);
1786 r
.begin
= current_end
;
1790 VEC_safe_push(memory_read_result_s
, (*result
), &r
);
1794 free_memory_read_result_vector (void *x
)
1796 VEC(memory_read_result_s
) *v
= (VEC(memory_read_result_s
) *) x
;
1797 memory_read_result_s
*current
;
1800 for (ix
= 0; VEC_iterate (memory_read_result_s
, v
, ix
, current
); ++ix
)
1802 xfree (current
->data
);
1804 VEC_free (memory_read_result_s
, v
);
1807 VEC(memory_read_result_s
) *
1808 read_memory_robust (struct target_ops
*ops
,
1809 const ULONGEST offset
, const LONGEST len
)
1811 VEC(memory_read_result_s
) *result
= 0;
1812 int unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
1814 LONGEST xfered_total
= 0;
1815 while (xfered_total
< len
)
1817 struct mem_region
*region
= lookup_mem_region (offset
+ xfered_total
);
1820 /* If there is no explicit region, a fake one should be created. */
1821 gdb_assert (region
);
1823 if (region
->hi
== 0)
1824 region_len
= len
- xfered_total
;
1826 region_len
= region
->hi
- offset
;
1828 if (region
->attrib
.mode
== MEM_NONE
|| region
->attrib
.mode
== MEM_WO
)
1830 /* Cannot read this region. Note that we can end up here only
1831 if the region is explicitly marked inaccessible, or
1832 'inaccessible-by-default' is in effect. */
1833 xfered_total
+= region_len
;
1837 LONGEST to_read
= min (len
- xfered_total
, region_len
);
1838 gdb_byte
*buffer
= (gdb_byte
*) xmalloc (to_read
* unit_size
);
1840 LONGEST xfered_partial
=
1841 target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1842 (gdb_byte
*) buffer
,
1843 offset
+ xfered_total
, to_read
);
1844 /* Call an observer, notifying them of the xfer progress? */
1845 if (xfered_partial
<= 0)
1847 /* Got an error reading full chunk. See if maybe we can read
1850 read_whatever_is_readable (ops
, offset
+ xfered_total
,
1851 offset
+ xfered_total
+ to_read
,
1852 unit_size
, &result
);
1853 xfered_total
+= to_read
;
1857 struct memory_read_result r
;
1859 r
.begin
= offset
+ xfered_total
;
1860 r
.end
= r
.begin
+ xfered_partial
;
1861 VEC_safe_push (memory_read_result_s
, result
, &r
);
1862 xfered_total
+= xfered_partial
;
1871 /* An alternative to target_write with progress callbacks. */
1874 target_write_with_progress (struct target_ops
*ops
,
1875 enum target_object object
,
1876 const char *annex
, const gdb_byte
*buf
,
1877 ULONGEST offset
, LONGEST len
,
1878 void (*progress
) (ULONGEST
, void *), void *baton
)
1880 LONGEST xfered_total
= 0;
1883 /* If we are writing to a memory object, find the length of an addressable
1884 unit for that architecture. */
1885 if (object
== TARGET_OBJECT_MEMORY
1886 || object
== TARGET_OBJECT_STACK_MEMORY
1887 || object
== TARGET_OBJECT_CODE_MEMORY
1888 || object
== TARGET_OBJECT_RAW_MEMORY
)
1889 unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
1891 /* Give the progress callback a chance to set up. */
1893 (*progress
) (0, baton
);
1895 while (xfered_total
< len
)
1897 ULONGEST xfered_partial
;
1898 enum target_xfer_status status
;
1900 status
= target_write_partial (ops
, object
, annex
,
1901 buf
+ xfered_total
* unit_size
,
1902 offset
+ xfered_total
, len
- xfered_total
,
1905 if (status
!= TARGET_XFER_OK
)
1906 return status
== TARGET_XFER_EOF
? xfered_total
: TARGET_XFER_E_IO
;
1909 (*progress
) (xfered_partial
, baton
);
1911 xfered_total
+= xfered_partial
;
1917 /* For docs on target_write see target.h. */
1920 target_write (struct target_ops
*ops
,
1921 enum target_object object
,
1922 const char *annex
, const gdb_byte
*buf
,
1923 ULONGEST offset
, LONGEST len
)
1925 return target_write_with_progress (ops
, object
, annex
, buf
, offset
, len
,
1929 /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return
1930 the size of the transferred data. PADDING additional bytes are
1931 available in *BUF_P. This is a helper function for
1932 target_read_alloc; see the declaration of that function for more
1936 target_read_alloc_1 (struct target_ops
*ops
, enum target_object object
,
1937 const char *annex
, gdb_byte
**buf_p
, int padding
)
1939 size_t buf_alloc
, buf_pos
;
1942 /* This function does not have a length parameter; it reads the
1943 entire OBJECT). Also, it doesn't support objects fetched partly
1944 from one target and partly from another (in a different stratum,
1945 e.g. a core file and an executable). Both reasons make it
1946 unsuitable for reading memory. */
1947 gdb_assert (object
!= TARGET_OBJECT_MEMORY
);
1949 /* Start by reading up to 4K at a time. The target will throttle
1950 this number down if necessary. */
1952 buf
= (gdb_byte
*) xmalloc (buf_alloc
);
1956 ULONGEST xfered_len
;
1957 enum target_xfer_status status
;
1959 status
= target_read_partial (ops
, object
, annex
, &buf
[buf_pos
],
1960 buf_pos
, buf_alloc
- buf_pos
- padding
,
1963 if (status
== TARGET_XFER_EOF
)
1965 /* Read all there was. */
1972 else if (status
!= TARGET_XFER_OK
)
1974 /* An error occurred. */
1976 return TARGET_XFER_E_IO
;
1979 buf_pos
+= xfered_len
;
1981 /* If the buffer is filling up, expand it. */
1982 if (buf_alloc
< buf_pos
* 2)
1985 buf
= (gdb_byte
*) xrealloc (buf
, buf_alloc
);
1992 /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return
1993 the size of the transferred data. See the declaration in "target.h"
1994 function for more information about the return value. */
1997 target_read_alloc (struct target_ops
*ops
, enum target_object object
,
1998 const char *annex
, gdb_byte
**buf_p
)
2000 return target_read_alloc_1 (ops
, object
, annex
, buf_p
, 0);
2003 /* Read OBJECT/ANNEX using OPS. The result is NUL-terminated and
2004 returned as a string, allocated using xmalloc. If an error occurs
2005 or the transfer is unsupported, NULL is returned. Empty objects
2006 are returned as allocated but empty strings. A warning is issued
2007 if the result contains any embedded NUL bytes. */
2010 target_read_stralloc (struct target_ops
*ops
, enum target_object object
,
2015 LONGEST i
, transferred
;
2017 transferred
= target_read_alloc_1 (ops
, object
, annex
, &buffer
, 1);
2018 bufstr
= (char *) buffer
;
2020 if (transferred
< 0)
2023 if (transferred
== 0)
2024 return xstrdup ("");
2026 bufstr
[transferred
] = 0;
2028 /* Check for embedded NUL bytes; but allow trailing NULs. */
2029 for (i
= strlen (bufstr
); i
< transferred
; i
++)
2032 warning (_("target object %d, annex %s, "
2033 "contained unexpected null characters"),
2034 (int) object
, annex
? annex
: "(none)");
2041 /* Memory transfer methods. */
2044 get_target_memory (struct target_ops
*ops
, CORE_ADDR addr
, gdb_byte
*buf
,
2047 /* This method is used to read from an alternate, non-current
2048 target. This read must bypass the overlay support (as symbols
2049 don't match this target), and GDB's internal cache (wrong cache
2050 for this target). */
2051 if (target_read (ops
, TARGET_OBJECT_RAW_MEMORY
, NULL
, buf
, addr
, len
)
2053 memory_error (TARGET_XFER_E_IO
, addr
);
2057 get_target_memory_unsigned (struct target_ops
*ops
, CORE_ADDR addr
,
2058 int len
, enum bfd_endian byte_order
)
2060 gdb_byte buf
[sizeof (ULONGEST
)];
2062 gdb_assert (len
<= sizeof (buf
));
2063 get_target_memory (ops
, addr
, buf
, len
);
2064 return extract_unsigned_integer (buf
, len
, byte_order
);
2070 target_insert_breakpoint (struct gdbarch
*gdbarch
,
2071 struct bp_target_info
*bp_tgt
)
2073 if (!may_insert_breakpoints
)
2075 warning (_("May not insert breakpoints"));
2079 return current_target
.to_insert_breakpoint (¤t_target
,
2086 target_remove_breakpoint (struct gdbarch
*gdbarch
,
2087 struct bp_target_info
*bp_tgt
)
2089 /* This is kind of a weird case to handle, but the permission might
2090 have been changed after breakpoints were inserted - in which case
2091 we should just take the user literally and assume that any
2092 breakpoints should be left in place. */
2093 if (!may_insert_breakpoints
)
2095 warning (_("May not remove breakpoints"));
2099 return current_target
.to_remove_breakpoint (¤t_target
,
2104 target_info (char *args
, int from_tty
)
2106 struct target_ops
*t
;
2107 int has_all_mem
= 0;
2109 if (symfile_objfile
!= NULL
)
2110 printf_unfiltered (_("Symbols from \"%s\".\n"),
2111 objfile_name (symfile_objfile
));
2113 for (t
= target_stack
; t
!= NULL
; t
= t
->beneath
)
2115 if (!(*t
->to_has_memory
) (t
))
2118 if ((int) (t
->to_stratum
) <= (int) dummy_stratum
)
2121 printf_unfiltered (_("\tWhile running this, "
2122 "GDB does not access memory from...\n"));
2123 printf_unfiltered ("%s:\n", t
->to_longname
);
2124 (t
->to_files_info
) (t
);
2125 has_all_mem
= (*t
->to_has_all_memory
) (t
);
2129 /* This function is called before any new inferior is created, e.g.
2130 by running a program, attaching, or connecting to a target.
2131 It cleans up any state from previous invocations which might
2132 change between runs. This is a subset of what target_preopen
2133 resets (things which might change between targets). */
2136 target_pre_inferior (int from_tty
)
2138 /* Clear out solib state. Otherwise the solib state of the previous
2139 inferior might have survived and is entirely wrong for the new
2140 target. This has been observed on GNU/Linux using glibc 2.3. How
2152 Cannot access memory at address 0xdeadbeef
2155 /* In some OSs, the shared library list is the same/global/shared
2156 across inferiors. If code is shared between processes, so are
2157 memory regions and features. */
2158 if (!gdbarch_has_global_solist (target_gdbarch ()))
2160 no_shared_libraries (NULL
, from_tty
);
2162 invalidate_target_mem_regions ();
2164 target_clear_description ();
2167 /* attach_flag may be set if the previous process associated with
2168 the inferior was attached to. */
2169 current_inferior ()->attach_flag
= 0;
2171 current_inferior ()->highest_thread_num
= 0;
2173 agent_capability_invalidate ();
2176 /* Callback for iterate_over_inferiors. Gets rid of the given
2180 dispose_inferior (struct inferior
*inf
, void *args
)
2182 struct thread_info
*thread
;
2184 thread
= any_thread_of_process (inf
->pid
);
2187 switch_to_thread (thread
->ptid
);
2189 /* Core inferiors actually should be detached, not killed. */
2190 if (target_has_execution
)
2193 target_detach (NULL
, 0);
2199 /* This is to be called by the open routine before it does
2203 target_preopen (int from_tty
)
2207 if (have_inferiors ())
2210 || !have_live_inferiors ()
2211 || query (_("A program is being debugged already. Kill it? ")))
2212 iterate_over_inferiors (dispose_inferior
, NULL
);
2214 error (_("Program not killed."));
2217 /* Calling target_kill may remove the target from the stack. But if
2218 it doesn't (which seems like a win for UDI), remove it now. */
2219 /* Leave the exec target, though. The user may be switching from a
2220 live process to a core of the same program. */
2221 pop_all_targets_above (file_stratum
);
2223 target_pre_inferior (from_tty
);
2226 /* Detach a target after doing deferred register stores. */
2229 target_detach (const char *args
, int from_tty
)
2231 if (gdbarch_has_global_breakpoints (target_gdbarch ()))
2232 /* Don't remove global breakpoints here. They're removed on
2233 disconnection from the target. */
2236 /* If we're in breakpoints-always-inserted mode, have to remove
2237 them before detaching. */
2238 remove_breakpoints_pid (ptid_get_pid (inferior_ptid
));
2240 prepare_for_detach ();
2242 current_target
.to_detach (¤t_target
, args
, from_tty
);
2246 target_disconnect (const char *args
, int from_tty
)
2248 /* If we're in breakpoints-always-inserted mode or if breakpoints
2249 are global across processes, we have to remove them before
2251 remove_breakpoints ();
2253 current_target
.to_disconnect (¤t_target
, args
, from_tty
);
2257 target_wait (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
2259 return (current_target
.to_wait
) (¤t_target
, ptid
, status
, options
);
2265 default_target_wait (struct target_ops
*ops
,
2266 ptid_t ptid
, struct target_waitstatus
*status
,
2269 status
->kind
= TARGET_WAITKIND_IGNORE
;
2270 return minus_one_ptid
;
2274 target_pid_to_str (ptid_t ptid
)
2276 return (*current_target
.to_pid_to_str
) (¤t_target
, ptid
);
2280 target_thread_name (struct thread_info
*info
)
2282 return current_target
.to_thread_name (¤t_target
, info
);
2286 target_resume (ptid_t ptid
, int step
, enum gdb_signal signal
)
2288 target_dcache_invalidate ();
2290 current_target
.to_resume (¤t_target
, ptid
, step
, signal
);
2292 registers_changed_ptid (ptid
);
2293 /* We only set the internal executing state here. The user/frontend
2294 running state is set at a higher level. */
2295 set_executing (ptid
, 1);
2296 clear_inline_frame_state (ptid
);
2300 target_pass_signals (int numsigs
, unsigned char *pass_signals
)
2302 (*current_target
.to_pass_signals
) (¤t_target
, numsigs
, pass_signals
);
2306 target_program_signals (int numsigs
, unsigned char *program_signals
)
2308 (*current_target
.to_program_signals
) (¤t_target
,
2309 numsigs
, program_signals
);
2313 default_follow_fork (struct target_ops
*self
, int follow_child
,
2316 /* Some target returned a fork event, but did not know how to follow it. */
2317 internal_error (__FILE__
, __LINE__
,
2318 _("could not find a target to follow fork"));
2321 /* Look through the list of possible targets for a target that can
2325 target_follow_fork (int follow_child
, int detach_fork
)
2327 return current_target
.to_follow_fork (¤t_target
,
2328 follow_child
, detach_fork
);
2331 /* Target wrapper for follow exec hook. */
2334 target_follow_exec (struct inferior
*inf
, char *execd_pathname
)
2336 current_target
.to_follow_exec (¤t_target
, inf
, execd_pathname
);
2340 default_mourn_inferior (struct target_ops
*self
)
2342 internal_error (__FILE__
, __LINE__
,
2343 _("could not find a target to follow mourn inferior"));
2347 target_mourn_inferior (void)
2349 current_target
.to_mourn_inferior (¤t_target
);
2351 /* We no longer need to keep handles on any of the object files.
2352 Make sure to release them to avoid unnecessarily locking any
2353 of them while we're not actually debugging. */
2354 bfd_cache_close_all ();
2357 /* Look for a target which can describe architectural features, starting
2358 from TARGET. If we find one, return its description. */
2360 const struct target_desc
*
2361 target_read_description (struct target_ops
*target
)
2363 return target
->to_read_description (target
);
2366 /* This implements a basic search of memory, reading target memory and
2367 performing the search here (as opposed to performing the search in on the
2368 target side with, for example, gdbserver). */
2371 simple_search_memory (struct target_ops
*ops
,
2372 CORE_ADDR start_addr
, ULONGEST search_space_len
,
2373 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2374 CORE_ADDR
*found_addrp
)
2376 /* NOTE: also defined in find.c testcase. */
2377 #define SEARCH_CHUNK_SIZE 16000
2378 const unsigned chunk_size
= SEARCH_CHUNK_SIZE
;
2379 /* Buffer to hold memory contents for searching. */
2380 gdb_byte
*search_buf
;
2381 unsigned search_buf_size
;
2382 struct cleanup
*old_cleanups
;
2384 search_buf_size
= chunk_size
+ pattern_len
- 1;
2386 /* No point in trying to allocate a buffer larger than the search space. */
2387 if (search_space_len
< search_buf_size
)
2388 search_buf_size
= search_space_len
;
2390 search_buf
= (gdb_byte
*) malloc (search_buf_size
);
2391 if (search_buf
== NULL
)
2392 error (_("Unable to allocate memory to perform the search."));
2393 old_cleanups
= make_cleanup (free_current_contents
, &search_buf
);
2395 /* Prime the search buffer. */
2397 if (target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2398 search_buf
, start_addr
, search_buf_size
) != search_buf_size
)
2400 warning (_("Unable to access %s bytes of target "
2401 "memory at %s, halting search."),
2402 pulongest (search_buf_size
), hex_string (start_addr
));
2403 do_cleanups (old_cleanups
);
2407 /* Perform the search.
2409 The loop is kept simple by allocating [N + pattern-length - 1] bytes.
2410 When we've scanned N bytes we copy the trailing bytes to the start and
2411 read in another N bytes. */
2413 while (search_space_len
>= pattern_len
)
2415 gdb_byte
*found_ptr
;
2416 unsigned nr_search_bytes
= min (search_space_len
, search_buf_size
);
2418 found_ptr
= (gdb_byte
*) memmem (search_buf
, nr_search_bytes
,
2419 pattern
, pattern_len
);
2421 if (found_ptr
!= NULL
)
2423 CORE_ADDR found_addr
= start_addr
+ (found_ptr
- search_buf
);
2425 *found_addrp
= found_addr
;
2426 do_cleanups (old_cleanups
);
2430 /* Not found in this chunk, skip to next chunk. */
2432 /* Don't let search_space_len wrap here, it's unsigned. */
2433 if (search_space_len
>= chunk_size
)
2434 search_space_len
-= chunk_size
;
2436 search_space_len
= 0;
2438 if (search_space_len
>= pattern_len
)
2440 unsigned keep_len
= search_buf_size
- chunk_size
;
2441 CORE_ADDR read_addr
= start_addr
+ chunk_size
+ keep_len
;
2444 /* Copy the trailing part of the previous iteration to the front
2445 of the buffer for the next iteration. */
2446 gdb_assert (keep_len
== pattern_len
- 1);
2447 memcpy (search_buf
, search_buf
+ chunk_size
, keep_len
);
2449 nr_to_read
= min (search_space_len
- keep_len
, chunk_size
);
2451 if (target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2452 search_buf
+ keep_len
, read_addr
,
2453 nr_to_read
) != nr_to_read
)
2455 warning (_("Unable to access %s bytes of target "
2456 "memory at %s, halting search."),
2457 plongest (nr_to_read
),
2458 hex_string (read_addr
));
2459 do_cleanups (old_cleanups
);
2463 start_addr
+= chunk_size
;
2469 do_cleanups (old_cleanups
);
2473 /* Default implementation of memory-searching. */
2476 default_search_memory (struct target_ops
*self
,
2477 CORE_ADDR start_addr
, ULONGEST search_space_len
,
2478 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2479 CORE_ADDR
*found_addrp
)
2481 /* Start over from the top of the target stack. */
2482 return simple_search_memory (current_target
.beneath
,
2483 start_addr
, search_space_len
,
2484 pattern
, pattern_len
, found_addrp
);
2487 /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the
2488 sequence of bytes in PATTERN with length PATTERN_LEN.
2490 The result is 1 if found, 0 if not found, and -1 if there was an error
2491 requiring halting of the search (e.g. memory read error).
2492 If the pattern is found the address is recorded in FOUND_ADDRP. */
2495 target_search_memory (CORE_ADDR start_addr
, ULONGEST search_space_len
,
2496 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2497 CORE_ADDR
*found_addrp
)
2499 return current_target
.to_search_memory (¤t_target
, start_addr
,
2501 pattern
, pattern_len
, found_addrp
);
2504 /* Look through the currently pushed targets. If none of them will
2505 be able to restart the currently running process, issue an error
2509 target_require_runnable (void)
2511 struct target_ops
*t
;
2513 for (t
= target_stack
; t
!= NULL
; t
= t
->beneath
)
2515 /* If this target knows how to create a new program, then
2516 assume we will still be able to after killing the current
2517 one. Either killing and mourning will not pop T, or else
2518 find_default_run_target will find it again. */
2519 if (t
->to_create_inferior
!= NULL
)
2522 /* Do not worry about targets at certain strata that can not
2523 create inferiors. Assume they will be pushed again if
2524 necessary, and continue to the process_stratum. */
2525 if (t
->to_stratum
== thread_stratum
2526 || t
->to_stratum
== record_stratum
2527 || t
->to_stratum
== arch_stratum
)
2530 error (_("The \"%s\" target does not support \"run\". "
2531 "Try \"help target\" or \"continue\"."),
2535 /* This function is only called if the target is running. In that
2536 case there should have been a process_stratum target and it
2537 should either know how to create inferiors, or not... */
2538 internal_error (__FILE__
, __LINE__
, _("No targets found"));
2541 /* Whether GDB is allowed to fall back to the default run target for
2542 "run", "attach", etc. when no target is connected yet. */
2543 static int auto_connect_native_target
= 1;
2546 show_auto_connect_native_target (struct ui_file
*file
, int from_tty
,
2547 struct cmd_list_element
*c
, const char *value
)
2549 fprintf_filtered (file
,
2550 _("Whether GDB may automatically connect to the "
2551 "native target is %s.\n"),
2555 /* Look through the list of possible targets for a target that can
2556 execute a run or attach command without any other data. This is
2557 used to locate the default process stratum.
2559 If DO_MESG is not NULL, the result is always valid (error() is
2560 called for errors); else, return NULL on error. */
2562 static struct target_ops
*
2563 find_default_run_target (char *do_mesg
)
2565 struct target_ops
*runable
= NULL
;
2567 if (auto_connect_native_target
)
2569 struct target_ops
*t
;
2573 for (i
= 0; VEC_iterate (target_ops_p
, target_structs
, i
, t
); ++i
)
2575 if (t
->to_can_run
!= delegate_can_run
&& target_can_run (t
))
2586 if (runable
== NULL
)
2589 error (_("Don't know how to %s. Try \"help target\"."), do_mesg
);
2600 find_attach_target (void)
2602 struct target_ops
*t
;
2604 /* If a target on the current stack can attach, use it. */
2605 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2607 if (t
->to_attach
!= NULL
)
2611 /* Otherwise, use the default run target for attaching. */
2613 t
= find_default_run_target ("attach");
2621 find_run_target (void)
2623 struct target_ops
*t
;
2625 /* If a target on the current stack can attach, use it. */
2626 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2628 if (t
->to_create_inferior
!= NULL
)
2632 /* Otherwise, use the default run target. */
2634 t
= find_default_run_target ("run");
2639 /* Implement the "info proc" command. */
2642 target_info_proc (const char *args
, enum info_proc_what what
)
2644 struct target_ops
*t
;
2646 /* If we're already connected to something that can get us OS
2647 related data, use it. Otherwise, try using the native
2649 if (current_target
.to_stratum
>= process_stratum
)
2650 t
= current_target
.beneath
;
2652 t
= find_default_run_target (NULL
);
2654 for (; t
!= NULL
; t
= t
->beneath
)
2656 if (t
->to_info_proc
!= NULL
)
2658 t
->to_info_proc (t
, args
, what
);
2661 fprintf_unfiltered (gdb_stdlog
,
2662 "target_info_proc (\"%s\", %d)\n", args
, what
);
2672 find_default_supports_disable_randomization (struct target_ops
*self
)
2674 struct target_ops
*t
;
2676 t
= find_default_run_target (NULL
);
2677 if (t
&& t
->to_supports_disable_randomization
)
2678 return (t
->to_supports_disable_randomization
) (t
);
2683 target_supports_disable_randomization (void)
2685 struct target_ops
*t
;
2687 for (t
= ¤t_target
; t
!= NULL
; t
= t
->beneath
)
2688 if (t
->to_supports_disable_randomization
)
2689 return t
->to_supports_disable_randomization (t
);
2695 target_get_osdata (const char *type
)
2697 struct target_ops
*t
;
2699 /* If we're already connected to something that can get us OS
2700 related data, use it. Otherwise, try using the native
2702 if (current_target
.to_stratum
>= process_stratum
)
2703 t
= current_target
.beneath
;
2705 t
= find_default_run_target ("get OS data");
2710 return target_read_stralloc (t
, TARGET_OBJECT_OSDATA
, type
);
2713 static struct address_space
*
2714 default_thread_address_space (struct target_ops
*self
, ptid_t ptid
)
2716 struct inferior
*inf
;
2718 /* Fall-back to the "main" address space of the inferior. */
2719 inf
= find_inferior_ptid (ptid
);
2721 if (inf
== NULL
|| inf
->aspace
== NULL
)
2722 internal_error (__FILE__
, __LINE__
,
2723 _("Can't determine the current "
2724 "address space of thread %s\n"),
2725 target_pid_to_str (ptid
));
2730 /* Determine the current address space of thread PTID. */
2732 struct address_space
*
2733 target_thread_address_space (ptid_t ptid
)
2735 struct address_space
*aspace
;
2737 aspace
= current_target
.to_thread_address_space (¤t_target
, ptid
);
2738 gdb_assert (aspace
!= NULL
);
2744 /* Target file operations. */
2746 static struct target_ops
*
2747 default_fileio_target (void)
2749 /* If we're already connected to something that can perform
2750 file I/O, use it. Otherwise, try using the native target. */
2751 if (current_target
.to_stratum
>= process_stratum
)
2752 return current_target
.beneath
;
2754 return find_default_run_target ("file I/O");
2757 /* File handle for target file operations. */
2761 /* The target on which this file is open. */
2762 struct target_ops
*t
;
2764 /* The file descriptor on the target. */
2768 DEF_VEC_O (fileio_fh_t
);
2770 /* Vector of currently open file handles. The value returned by
2771 target_fileio_open and passed as the FD argument to other
2772 target_fileio_* functions is an index into this vector. This
2773 vector's entries are never freed; instead, files are marked as
2774 closed, and the handle becomes available for reuse. */
2775 static VEC (fileio_fh_t
) *fileio_fhandles
;
2777 /* Macro to check whether a fileio_fh_t represents a closed file. */
2778 #define is_closed_fileio_fh(fd) ((fd) < 0)
2780 /* Index into fileio_fhandles of the lowest handle that might be
2781 closed. This permits handle reuse without searching the whole
2782 list each time a new file is opened. */
2783 static int lowest_closed_fd
;
2785 /* Acquire a target fileio file descriptor. */
2788 acquire_fileio_fd (struct target_ops
*t
, int fd
)
2792 gdb_assert (!is_closed_fileio_fh (fd
));
2794 /* Search for closed handles to reuse. */
2796 VEC_iterate (fileio_fh_t
, fileio_fhandles
,
2797 lowest_closed_fd
, fh
);
2799 if (is_closed_fileio_fh (fh
->fd
))
2802 /* Push a new handle if no closed handles were found. */
2803 if (lowest_closed_fd
== VEC_length (fileio_fh_t
, fileio_fhandles
))
2804 fh
= VEC_safe_push (fileio_fh_t
, fileio_fhandles
, NULL
);
2806 /* Fill in the handle. */
2810 /* Return its index, and start the next lookup at
2812 return lowest_closed_fd
++;
2815 /* Release a target fileio file descriptor. */
2818 release_fileio_fd (int fd
, fileio_fh_t
*fh
)
2821 lowest_closed_fd
= min (lowest_closed_fd
, fd
);
2824 /* Return a pointer to the fileio_fhandle_t corresponding to FD. */
2826 #define fileio_fd_to_fh(fd) \
2827 VEC_index (fileio_fh_t, fileio_fhandles, (fd))
2829 /* Helper for target_fileio_open and
2830 target_fileio_open_warn_if_slow. */
2833 target_fileio_open_1 (struct inferior
*inf
, const char *filename
,
2834 int flags
, int mode
, int warn_if_slow
,
2837 struct target_ops
*t
;
2839 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
2841 if (t
->to_fileio_open
!= NULL
)
2843 int fd
= t
->to_fileio_open (t
, inf
, filename
, flags
, mode
,
2844 warn_if_slow
, target_errno
);
2849 fd
= acquire_fileio_fd (t
, fd
);
2852 fprintf_unfiltered (gdb_stdlog
,
2853 "target_fileio_open (%d,%s,0x%x,0%o,%d)"
2855 inf
== NULL
? 0 : inf
->num
,
2856 filename
, flags
, mode
,
2858 fd
!= -1 ? 0 : *target_errno
);
2863 *target_errno
= FILEIO_ENOSYS
;
2870 target_fileio_open (struct inferior
*inf
, const char *filename
,
2871 int flags
, int mode
, int *target_errno
)
2873 return target_fileio_open_1 (inf
, filename
, flags
, mode
, 0,
2880 target_fileio_open_warn_if_slow (struct inferior
*inf
,
2881 const char *filename
,
2882 int flags
, int mode
, int *target_errno
)
2884 return target_fileio_open_1 (inf
, filename
, flags
, mode
, 1,
2891 target_fileio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
2892 ULONGEST offset
, int *target_errno
)
2894 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
2897 if (is_closed_fileio_fh (fh
->fd
))
2898 *target_errno
= EBADF
;
2900 ret
= fh
->t
->to_fileio_pwrite (fh
->t
, fh
->fd
, write_buf
,
2901 len
, offset
, target_errno
);
2904 fprintf_unfiltered (gdb_stdlog
,
2905 "target_fileio_pwrite (%d,...,%d,%s) "
2907 fd
, len
, pulongest (offset
),
2908 ret
, ret
!= -1 ? 0 : *target_errno
);
2915 target_fileio_pread (int fd
, gdb_byte
*read_buf
, int len
,
2916 ULONGEST offset
, int *target_errno
)
2918 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
2921 if (is_closed_fileio_fh (fh
->fd
))
2922 *target_errno
= EBADF
;
2924 ret
= fh
->t
->to_fileio_pread (fh
->t
, fh
->fd
, read_buf
,
2925 len
, offset
, target_errno
);
2928 fprintf_unfiltered (gdb_stdlog
,
2929 "target_fileio_pread (%d,...,%d,%s) "
2931 fd
, len
, pulongest (offset
),
2932 ret
, ret
!= -1 ? 0 : *target_errno
);
2939 target_fileio_fstat (int fd
, struct stat
*sb
, int *target_errno
)
2941 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
2944 if (is_closed_fileio_fh (fh
->fd
))
2945 *target_errno
= EBADF
;
2947 ret
= fh
->t
->to_fileio_fstat (fh
->t
, fh
->fd
, sb
, target_errno
);
2950 fprintf_unfiltered (gdb_stdlog
,
2951 "target_fileio_fstat (%d) = %d (%d)\n",
2952 fd
, ret
, ret
!= -1 ? 0 : *target_errno
);
2959 target_fileio_close (int fd
, int *target_errno
)
2961 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
2964 if (is_closed_fileio_fh (fh
->fd
))
2965 *target_errno
= EBADF
;
2968 ret
= fh
->t
->to_fileio_close (fh
->t
, fh
->fd
, target_errno
);
2969 release_fileio_fd (fd
, fh
);
2973 fprintf_unfiltered (gdb_stdlog
,
2974 "target_fileio_close (%d) = %d (%d)\n",
2975 fd
, ret
, ret
!= -1 ? 0 : *target_errno
);
2982 target_fileio_unlink (struct inferior
*inf
, const char *filename
,
2985 struct target_ops
*t
;
2987 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
2989 if (t
->to_fileio_unlink
!= NULL
)
2991 int ret
= t
->to_fileio_unlink (t
, inf
, filename
,
2995 fprintf_unfiltered (gdb_stdlog
,
2996 "target_fileio_unlink (%d,%s)"
2998 inf
== NULL
? 0 : inf
->num
, filename
,
2999 ret
, ret
!= -1 ? 0 : *target_errno
);
3004 *target_errno
= FILEIO_ENOSYS
;
3011 target_fileio_readlink (struct inferior
*inf
, const char *filename
,
3014 struct target_ops
*t
;
3016 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
3018 if (t
->to_fileio_readlink
!= NULL
)
3020 char *ret
= t
->to_fileio_readlink (t
, inf
, filename
,
3024 fprintf_unfiltered (gdb_stdlog
,
3025 "target_fileio_readlink (%d,%s)"
3027 inf
== NULL
? 0 : inf
->num
,
3028 filename
, ret
? ret
: "(nil)",
3029 ret
? 0 : *target_errno
);
3034 *target_errno
= FILEIO_ENOSYS
;
3039 target_fileio_close_cleanup (void *opaque
)
3041 int fd
= *(int *) opaque
;
3044 target_fileio_close (fd
, &target_errno
);
3047 /* Read target file FILENAME, in the filesystem as seen by INF. If
3048 INF is NULL, use the filesystem seen by the debugger (GDB or, for
3049 remote targets, the remote stub). Store the result in *BUF_P and
3050 return the size of the transferred data. PADDING additional bytes
3051 are available in *BUF_P. This is a helper function for
3052 target_fileio_read_alloc; see the declaration of that function for
3053 more information. */
3056 target_fileio_read_alloc_1 (struct inferior
*inf
, const char *filename
,
3057 gdb_byte
**buf_p
, int padding
)
3059 struct cleanup
*close_cleanup
;
3060 size_t buf_alloc
, buf_pos
;
3066 fd
= target_fileio_open (inf
, filename
, FILEIO_O_RDONLY
, 0700,
3071 close_cleanup
= make_cleanup (target_fileio_close_cleanup
, &fd
);
3073 /* Start by reading up to 4K at a time. The target will throttle
3074 this number down if necessary. */
3076 buf
= (gdb_byte
*) xmalloc (buf_alloc
);
3080 n
= target_fileio_pread (fd
, &buf
[buf_pos
],
3081 buf_alloc
- buf_pos
- padding
, buf_pos
,
3085 /* An error occurred. */
3086 do_cleanups (close_cleanup
);
3092 /* Read all there was. */
3093 do_cleanups (close_cleanup
);
3103 /* If the buffer is filling up, expand it. */
3104 if (buf_alloc
< buf_pos
* 2)
3107 buf
= (gdb_byte
*) xrealloc (buf
, buf_alloc
);
3117 target_fileio_read_alloc (struct inferior
*inf
, const char *filename
,
3120 return target_fileio_read_alloc_1 (inf
, filename
, buf_p
, 0);
3126 target_fileio_read_stralloc (struct inferior
*inf
, const char *filename
)
3130 LONGEST i
, transferred
;
3132 transferred
= target_fileio_read_alloc_1 (inf
, filename
, &buffer
, 1);
3133 bufstr
= (char *) buffer
;
3135 if (transferred
< 0)
3138 if (transferred
== 0)
3139 return xstrdup ("");
3141 bufstr
[transferred
] = 0;
3143 /* Check for embedded NUL bytes; but allow trailing NULs. */
3144 for (i
= strlen (bufstr
); i
< transferred
; i
++)
3147 warning (_("target file %s "
3148 "contained unexpected null characters"),
3158 default_region_ok_for_hw_watchpoint (struct target_ops
*self
,
3159 CORE_ADDR addr
, int len
)
3161 return (len
<= gdbarch_ptr_bit (target_gdbarch ()) / TARGET_CHAR_BIT
);
3165 default_watchpoint_addr_within_range (struct target_ops
*target
,
3167 CORE_ADDR start
, int length
)
3169 return addr
>= start
&& addr
< start
+ length
;
3172 static struct gdbarch
*
3173 default_thread_architecture (struct target_ops
*ops
, ptid_t ptid
)
3175 return target_gdbarch ();
3179 return_zero (struct target_ops
*ignore
)
3185 return_zero_has_execution (struct target_ops
*ignore
, ptid_t ignore2
)
3191 * Find the next target down the stack from the specified target.
3195 find_target_beneath (struct target_ops
*t
)
3203 find_target_at (enum strata stratum
)
3205 struct target_ops
*t
;
3207 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3208 if (t
->to_stratum
== stratum
)
3215 /* The inferior process has died. Long live the inferior! */
3218 generic_mourn_inferior (void)
3222 ptid
= inferior_ptid
;
3223 inferior_ptid
= null_ptid
;
3225 /* Mark breakpoints uninserted in case something tries to delete a
3226 breakpoint while we delete the inferior's threads (which would
3227 fail, since the inferior is long gone). */
3228 mark_breakpoints_out ();
3230 if (!ptid_equal (ptid
, null_ptid
))
3232 int pid
= ptid_get_pid (ptid
);
3233 exit_inferior (pid
);
3236 /* Note this wipes step-resume breakpoints, so needs to be done
3237 after exit_inferior, which ends up referencing the step-resume
3238 breakpoints through clear_thread_inferior_resources. */
3239 breakpoint_init_inferior (inf_exited
);
3241 registers_changed ();
3243 reopen_exec_file ();
3244 reinit_frame_cache ();
3246 if (deprecated_detach_hook
)
3247 deprecated_detach_hook ();
3250 /* Convert a normal process ID to a string. Returns the string in a
3254 normal_pid_to_str (ptid_t ptid
)
3256 static char buf
[32];
3258 xsnprintf (buf
, sizeof buf
, "process %d", ptid_get_pid (ptid
));
3263 default_pid_to_str (struct target_ops
*ops
, ptid_t ptid
)
3265 return normal_pid_to_str (ptid
);
3268 /* Error-catcher for target_find_memory_regions. */
3270 dummy_find_memory_regions (struct target_ops
*self
,
3271 find_memory_region_ftype ignore1
, void *ignore2
)
3273 error (_("Command not implemented for this target."));
3277 /* Error-catcher for target_make_corefile_notes. */
3279 dummy_make_corefile_notes (struct target_ops
*self
,
3280 bfd
*ignore1
, int *ignore2
)
3282 error (_("Command not implemented for this target."));
3286 /* Set up the handful of non-empty slots needed by the dummy target
3290 init_dummy_target (void)
3292 dummy_target
.to_shortname
= "None";
3293 dummy_target
.to_longname
= "None";
3294 dummy_target
.to_doc
= "";
3295 dummy_target
.to_supports_disable_randomization
3296 = find_default_supports_disable_randomization
;
3297 dummy_target
.to_stratum
= dummy_stratum
;
3298 dummy_target
.to_has_all_memory
= return_zero
;
3299 dummy_target
.to_has_memory
= return_zero
;
3300 dummy_target
.to_has_stack
= return_zero
;
3301 dummy_target
.to_has_registers
= return_zero
;
3302 dummy_target
.to_has_execution
= return_zero_has_execution
;
3303 dummy_target
.to_magic
= OPS_MAGIC
;
3305 install_dummy_methods (&dummy_target
);
3310 target_close (struct target_ops
*targ
)
3312 gdb_assert (!target_is_pushed (targ
));
3314 if (targ
->to_xclose
!= NULL
)
3315 targ
->to_xclose (targ
);
3316 else if (targ
->to_close
!= NULL
)
3317 targ
->to_close (targ
);
3320 fprintf_unfiltered (gdb_stdlog
, "target_close ()\n");
3324 target_thread_alive (ptid_t ptid
)
3326 return current_target
.to_thread_alive (¤t_target
, ptid
);
3330 target_update_thread_list (void)
3332 current_target
.to_update_thread_list (¤t_target
);
3336 target_stop (ptid_t ptid
)
3340 warning (_("May not interrupt or stop the target, ignoring attempt"));
3344 (*current_target
.to_stop
) (¤t_target
, ptid
);
3348 target_interrupt (ptid_t ptid
)
3352 warning (_("May not interrupt or stop the target, ignoring attempt"));
3356 (*current_target
.to_interrupt
) (¤t_target
, ptid
);
3362 target_pass_ctrlc (void)
3364 (*current_target
.to_pass_ctrlc
) (¤t_target
);
3370 default_target_pass_ctrlc (struct target_ops
*ops
)
3372 target_interrupt (inferior_ptid
);
3375 /* See target/target.h. */
3378 target_stop_and_wait (ptid_t ptid
)
3380 struct target_waitstatus status
;
3381 int was_non_stop
= non_stop
;
3386 memset (&status
, 0, sizeof (status
));
3387 target_wait (ptid
, &status
, 0);
3389 non_stop
= was_non_stop
;
3392 /* See target/target.h. */
3395 target_continue_no_signal (ptid_t ptid
)
3397 target_resume (ptid
, 0, GDB_SIGNAL_0
);
3400 /* Concatenate ELEM to LIST, a comma separate list, and return the
3401 result. The LIST incoming argument is released. */
3404 str_comma_list_concat_elem (char *list
, const char *elem
)
3407 return xstrdup (elem
);
3409 return reconcat (list
, list
, ", ", elem
, (char *) NULL
);
3412 /* Helper for target_options_to_string. If OPT is present in
3413 TARGET_OPTIONS, append the OPT_STR (string version of OPT) in RET.
3414 Returns the new resulting string. OPT is removed from
3418 do_option (int *target_options
, char *ret
,
3419 int opt
, char *opt_str
)
3421 if ((*target_options
& opt
) != 0)
3423 ret
= str_comma_list_concat_elem (ret
, opt_str
);
3424 *target_options
&= ~opt
;
3431 target_options_to_string (int target_options
)
3435 #define DO_TARG_OPTION(OPT) \
3436 ret = do_option (&target_options, ret, OPT, #OPT)
3438 DO_TARG_OPTION (TARGET_WNOHANG
);
3440 if (target_options
!= 0)
3441 ret
= str_comma_list_concat_elem (ret
, "unknown???");
3449 debug_print_register (const char * func
,
3450 struct regcache
*regcache
, int regno
)
3452 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
3454 fprintf_unfiltered (gdb_stdlog
, "%s ", func
);
3455 if (regno
>= 0 && regno
< gdbarch_num_regs (gdbarch
)
3456 && gdbarch_register_name (gdbarch
, regno
) != NULL
3457 && gdbarch_register_name (gdbarch
, regno
)[0] != '\0')
3458 fprintf_unfiltered (gdb_stdlog
, "(%s)",
3459 gdbarch_register_name (gdbarch
, regno
));
3461 fprintf_unfiltered (gdb_stdlog
, "(%d)", regno
);
3462 if (regno
>= 0 && regno
< gdbarch_num_regs (gdbarch
))
3464 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
3465 int i
, size
= register_size (gdbarch
, regno
);
3466 gdb_byte buf
[MAX_REGISTER_SIZE
];
3468 regcache_raw_collect (regcache
, regno
, buf
);
3469 fprintf_unfiltered (gdb_stdlog
, " = ");
3470 for (i
= 0; i
< size
; i
++)
3472 fprintf_unfiltered (gdb_stdlog
, "%02x", buf
[i
]);
3474 if (size
<= sizeof (LONGEST
))
3476 ULONGEST val
= extract_unsigned_integer (buf
, size
, byte_order
);
3478 fprintf_unfiltered (gdb_stdlog
, " %s %s",
3479 core_addr_to_string_nz (val
), plongest (val
));
3482 fprintf_unfiltered (gdb_stdlog
, "\n");
3486 target_fetch_registers (struct regcache
*regcache
, int regno
)
3488 current_target
.to_fetch_registers (¤t_target
, regcache
, regno
);
3490 debug_print_register ("target_fetch_registers", regcache
, regno
);
3494 target_store_registers (struct regcache
*regcache
, int regno
)
3496 if (!may_write_registers
)
3497 error (_("Writing to registers is not allowed (regno %d)"), regno
);
3499 current_target
.to_store_registers (¤t_target
, regcache
, regno
);
3502 debug_print_register ("target_store_registers", regcache
, regno
);
3507 target_core_of_thread (ptid_t ptid
)
3509 return current_target
.to_core_of_thread (¤t_target
, ptid
);
3513 simple_verify_memory (struct target_ops
*ops
,
3514 const gdb_byte
*data
, CORE_ADDR lma
, ULONGEST size
)
3516 LONGEST total_xfered
= 0;
3518 while (total_xfered
< size
)
3520 ULONGEST xfered_len
;
3521 enum target_xfer_status status
;
3523 ULONGEST howmuch
= min (sizeof (buf
), size
- total_xfered
);
3525 status
= target_xfer_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
3526 buf
, NULL
, lma
+ total_xfered
, howmuch
,
3528 if (status
== TARGET_XFER_OK
3529 && memcmp (data
+ total_xfered
, buf
, xfered_len
) == 0)
3531 total_xfered
+= xfered_len
;
3540 /* Default implementation of memory verification. */
3543 default_verify_memory (struct target_ops
*self
,
3544 const gdb_byte
*data
, CORE_ADDR memaddr
, ULONGEST size
)
3546 /* Start over from the top of the target stack. */
3547 return simple_verify_memory (current_target
.beneath
,
3548 data
, memaddr
, size
);
3552 target_verify_memory (const gdb_byte
*data
, CORE_ADDR memaddr
, ULONGEST size
)
3554 return current_target
.to_verify_memory (¤t_target
,
3555 data
, memaddr
, size
);
3558 /* The documentation for this function is in its prototype declaration in
3562 target_insert_mask_watchpoint (CORE_ADDR addr
, CORE_ADDR mask
,
3563 enum target_hw_bp_type rw
)
3565 return current_target
.to_insert_mask_watchpoint (¤t_target
,
3569 /* The documentation for this function is in its prototype declaration in
3573 target_remove_mask_watchpoint (CORE_ADDR addr
, CORE_ADDR mask
,
3574 enum target_hw_bp_type rw
)
3576 return current_target
.to_remove_mask_watchpoint (¤t_target
,
3580 /* The documentation for this function is in its prototype declaration
3584 target_masked_watch_num_registers (CORE_ADDR addr
, CORE_ADDR mask
)
3586 return current_target
.to_masked_watch_num_registers (¤t_target
,
3590 /* The documentation for this function is in its prototype declaration
3594 target_ranged_break_num_registers (void)
3596 return current_target
.to_ranged_break_num_registers (¤t_target
);
3602 target_supports_btrace (enum btrace_format format
)
3604 return current_target
.to_supports_btrace (¤t_target
, format
);
3609 struct btrace_target_info
*
3610 target_enable_btrace (ptid_t ptid
, const struct btrace_config
*conf
)
3612 return current_target
.to_enable_btrace (¤t_target
, ptid
, conf
);
3618 target_disable_btrace (struct btrace_target_info
*btinfo
)
3620 current_target
.to_disable_btrace (¤t_target
, btinfo
);
3626 target_teardown_btrace (struct btrace_target_info
*btinfo
)
3628 current_target
.to_teardown_btrace (¤t_target
, btinfo
);
3634 target_read_btrace (struct btrace_data
*btrace
,
3635 struct btrace_target_info
*btinfo
,
3636 enum btrace_read_type type
)
3638 return current_target
.to_read_btrace (¤t_target
, btrace
, btinfo
, type
);
3643 const struct btrace_config
*
3644 target_btrace_conf (const struct btrace_target_info
*btinfo
)
3646 return current_target
.to_btrace_conf (¤t_target
, btinfo
);
3652 target_stop_recording (void)
3654 current_target
.to_stop_recording (¤t_target
);
3660 target_save_record (const char *filename
)
3662 current_target
.to_save_record (¤t_target
, filename
);
3668 target_supports_delete_record (void)
3670 struct target_ops
*t
;
3672 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3673 if (t
->to_delete_record
!= delegate_delete_record
3674 && t
->to_delete_record
!= tdefault_delete_record
)
3683 target_delete_record (void)
3685 current_target
.to_delete_record (¤t_target
);
3691 target_record_is_replaying (ptid_t ptid
)
3693 return current_target
.to_record_is_replaying (¤t_target
, ptid
);
3699 target_record_will_replay (ptid_t ptid
, int dir
)
3701 return current_target
.to_record_will_replay (¤t_target
, ptid
, dir
);
3707 target_record_stop_replaying (void)
3709 current_target
.to_record_stop_replaying (¤t_target
);
3715 target_goto_record_begin (void)
3717 current_target
.to_goto_record_begin (¤t_target
);
3723 target_goto_record_end (void)
3725 current_target
.to_goto_record_end (¤t_target
);
3731 target_goto_record (ULONGEST insn
)
3733 current_target
.to_goto_record (¤t_target
, insn
);
3739 target_insn_history (int size
, int flags
)
3741 current_target
.to_insn_history (¤t_target
, size
, flags
);
3747 target_insn_history_from (ULONGEST from
, int size
, int flags
)
3749 current_target
.to_insn_history_from (¤t_target
, from
, size
, flags
);
3755 target_insn_history_range (ULONGEST begin
, ULONGEST end
, int flags
)
3757 current_target
.to_insn_history_range (¤t_target
, begin
, end
, flags
);
3763 target_call_history (int size
, int flags
)
3765 current_target
.to_call_history (¤t_target
, size
, flags
);
3771 target_call_history_from (ULONGEST begin
, int size
, int flags
)
3773 current_target
.to_call_history_from (¤t_target
, begin
, size
, flags
);
3779 target_call_history_range (ULONGEST begin
, ULONGEST end
, int flags
)
3781 current_target
.to_call_history_range (¤t_target
, begin
, end
, flags
);
3786 const struct frame_unwind
*
3787 target_get_unwinder (void)
3789 return current_target
.to_get_unwinder (¤t_target
);
3794 const struct frame_unwind
*
3795 target_get_tailcall_unwinder (void)
3797 return current_target
.to_get_tailcall_unwinder (¤t_target
);
3803 target_prepare_to_generate_core (void)
3805 current_target
.to_prepare_to_generate_core (¤t_target
);
3811 target_done_generating_core (void)
3813 current_target
.to_done_generating_core (¤t_target
);
3817 setup_target_debug (void)
3819 memcpy (&debug_target
, ¤t_target
, sizeof debug_target
);
3821 init_debug_target (¤t_target
);
3825 static char targ_desc
[] =
3826 "Names of targets and files being debugged.\nShows the entire \
3827 stack of targets currently in use (including the exec-file,\n\
3828 core-file, and process, if any), as well as the symbol file name.";
3831 default_rcmd (struct target_ops
*self
, const char *command
,
3832 struct ui_file
*output
)
3834 error (_("\"monitor\" command not supported by this target."));
3838 do_monitor_command (char *cmd
,
3841 target_rcmd (cmd
, gdb_stdtarg
);
3844 /* Print the name of each layers of our target stack. */
3847 maintenance_print_target_stack (char *cmd
, int from_tty
)
3849 struct target_ops
*t
;
3851 printf_filtered (_("The current target stack is:\n"));
3853 for (t
= target_stack
; t
!= NULL
; t
= t
->beneath
)
3855 printf_filtered (" - %s (%s)\n", t
->to_shortname
, t
->to_longname
);
3862 target_async (int enable
)
3864 infrun_async (enable
);
3865 current_target
.to_async (¤t_target
, enable
);
3871 target_thread_events (int enable
)
3873 current_target
.to_thread_events (¤t_target
, enable
);
3876 /* Controls if targets can report that they can/are async. This is
3877 just for maintainers to use when debugging gdb. */
3878 int target_async_permitted
= 1;
3880 /* The set command writes to this variable. If the inferior is
3881 executing, target_async_permitted is *not* updated. */
3882 static int target_async_permitted_1
= 1;
3885 maint_set_target_async_command (char *args
, int from_tty
,
3886 struct cmd_list_element
*c
)
3888 if (have_live_inferiors ())
3890 target_async_permitted_1
= target_async_permitted
;
3891 error (_("Cannot change this setting while the inferior is running."));
3894 target_async_permitted
= target_async_permitted_1
;
3898 maint_show_target_async_command (struct ui_file
*file
, int from_tty
,
3899 struct cmd_list_element
*c
,
3902 fprintf_filtered (file
,
3903 _("Controlling the inferior in "
3904 "asynchronous mode is %s.\n"), value
);
3907 /* Return true if the target operates in non-stop mode even with "set
3911 target_always_non_stop_p (void)
3913 return current_target
.to_always_non_stop_p (¤t_target
);
3919 target_is_non_stop_p (void)
3922 || target_non_stop_enabled
== AUTO_BOOLEAN_TRUE
3923 || (target_non_stop_enabled
== AUTO_BOOLEAN_AUTO
3924 && target_always_non_stop_p ()));
3927 /* Controls if targets can report that they always run in non-stop
3928 mode. This is just for maintainers to use when debugging gdb. */
3929 enum auto_boolean target_non_stop_enabled
= AUTO_BOOLEAN_AUTO
;
3931 /* The set command writes to this variable. If the inferior is
3932 executing, target_non_stop_enabled is *not* updated. */
3933 static enum auto_boolean target_non_stop_enabled_1
= AUTO_BOOLEAN_AUTO
;
3935 /* Implementation of "maint set target-non-stop". */
3938 maint_set_target_non_stop_command (char *args
, int from_tty
,
3939 struct cmd_list_element
*c
)
3941 if (have_live_inferiors ())
3943 target_non_stop_enabled_1
= target_non_stop_enabled
;
3944 error (_("Cannot change this setting while the inferior is running."));
3947 target_non_stop_enabled
= target_non_stop_enabled_1
;
3950 /* Implementation of "maint show target-non-stop". */
3953 maint_show_target_non_stop_command (struct ui_file
*file
, int from_tty
,
3954 struct cmd_list_element
*c
,
3957 if (target_non_stop_enabled
== AUTO_BOOLEAN_AUTO
)
3958 fprintf_filtered (file
,
3959 _("Whether the target is always in non-stop mode "
3960 "is %s (currently %s).\n"), value
,
3961 target_always_non_stop_p () ? "on" : "off");
3963 fprintf_filtered (file
,
3964 _("Whether the target is always in non-stop mode "
3965 "is %s.\n"), value
);
3968 /* Temporary copies of permission settings. */
3970 static int may_write_registers_1
= 1;
3971 static int may_write_memory_1
= 1;
3972 static int may_insert_breakpoints_1
= 1;
3973 static int may_insert_tracepoints_1
= 1;
3974 static int may_insert_fast_tracepoints_1
= 1;
3975 static int may_stop_1
= 1;
3977 /* Make the user-set values match the real values again. */
3980 update_target_permissions (void)
3982 may_write_registers_1
= may_write_registers
;
3983 may_write_memory_1
= may_write_memory
;
3984 may_insert_breakpoints_1
= may_insert_breakpoints
;
3985 may_insert_tracepoints_1
= may_insert_tracepoints
;
3986 may_insert_fast_tracepoints_1
= may_insert_fast_tracepoints
;
3987 may_stop_1
= may_stop
;
3990 /* The one function handles (most of) the permission flags in the same
3994 set_target_permissions (char *args
, int from_tty
,
3995 struct cmd_list_element
*c
)
3997 if (target_has_execution
)
3999 update_target_permissions ();
4000 error (_("Cannot change this setting while the inferior is running."));
4003 /* Make the real values match the user-changed values. */
4004 may_write_registers
= may_write_registers_1
;
4005 may_insert_breakpoints
= may_insert_breakpoints_1
;
4006 may_insert_tracepoints
= may_insert_tracepoints_1
;
4007 may_insert_fast_tracepoints
= may_insert_fast_tracepoints_1
;
4008 may_stop
= may_stop_1
;
4009 update_observer_mode ();
4012 /* Set memory write permission independently of observer mode. */
4015 set_write_memory_permission (char *args
, int from_tty
,
4016 struct cmd_list_element
*c
)
4018 /* Make the real values match the user-changed values. */
4019 may_write_memory
= may_write_memory_1
;
4020 update_observer_mode ();
4025 initialize_targets (void)
4027 init_dummy_target ();
4028 push_target (&dummy_target
);
4030 add_info ("target", target_info
, targ_desc
);
4031 add_info ("files", target_info
, targ_desc
);
4033 add_setshow_zuinteger_cmd ("target", class_maintenance
, &targetdebug
, _("\
4034 Set target debugging."), _("\
4035 Show target debugging."), _("\
4036 When non-zero, target debugging is enabled. Higher numbers are more\n\
4040 &setdebuglist
, &showdebuglist
);
4042 add_setshow_boolean_cmd ("trust-readonly-sections", class_support
,
4043 &trust_readonly
, _("\
4044 Set mode for reading from readonly sections."), _("\
4045 Show mode for reading from readonly sections."), _("\
4046 When this mode is on, memory reads from readonly sections (such as .text)\n\
4047 will be read from the object file instead of from the target. This will\n\
4048 result in significant performance improvement for remote targets."),
4050 show_trust_readonly
,
4051 &setlist
, &showlist
);
4053 add_com ("monitor", class_obscure
, do_monitor_command
,
4054 _("Send a command to the remote monitor (remote targets only)."));
4056 add_cmd ("target-stack", class_maintenance
, maintenance_print_target_stack
,
4057 _("Print the name of each layer of the internal target stack."),
4058 &maintenanceprintlist
);
4060 add_setshow_boolean_cmd ("target-async", no_class
,
4061 &target_async_permitted_1
, _("\
4062 Set whether gdb controls the inferior in asynchronous mode."), _("\
4063 Show whether gdb controls the inferior in asynchronous mode."), _("\
4064 Tells gdb whether to control the inferior in asynchronous mode."),
4065 maint_set_target_async_command
,
4066 maint_show_target_async_command
,
4067 &maintenance_set_cmdlist
,
4068 &maintenance_show_cmdlist
);
4070 add_setshow_auto_boolean_cmd ("target-non-stop", no_class
,
4071 &target_non_stop_enabled_1
, _("\
4072 Set whether gdb always controls the inferior in non-stop mode."), _("\
4073 Show whether gdb always controls the inferior in non-stop mode."), _("\
4074 Tells gdb whether to control the inferior in non-stop mode."),
4075 maint_set_target_non_stop_command
,
4076 maint_show_target_non_stop_command
,
4077 &maintenance_set_cmdlist
,
4078 &maintenance_show_cmdlist
);
4080 add_setshow_boolean_cmd ("may-write-registers", class_support
,
4081 &may_write_registers_1
, _("\
4082 Set permission to write into registers."), _("\
4083 Show permission to write into registers."), _("\
4084 When this permission is on, GDB may write into the target's registers.\n\
4085 Otherwise, any sort of write attempt will result in an error."),
4086 set_target_permissions
, NULL
,
4087 &setlist
, &showlist
);
4089 add_setshow_boolean_cmd ("may-write-memory", class_support
,
4090 &may_write_memory_1
, _("\
4091 Set permission to write into target memory."), _("\
4092 Show permission to write into target memory."), _("\
4093 When this permission is on, GDB may write into the target's memory.\n\
4094 Otherwise, any sort of write attempt will result in an error."),
4095 set_write_memory_permission
, NULL
,
4096 &setlist
, &showlist
);
4098 add_setshow_boolean_cmd ("may-insert-breakpoints", class_support
,
4099 &may_insert_breakpoints_1
, _("\
4100 Set permission to insert breakpoints in the target."), _("\
4101 Show permission to insert breakpoints in the target."), _("\
4102 When this permission is on, GDB may insert breakpoints in the program.\n\
4103 Otherwise, any sort of insertion attempt will result in an error."),
4104 set_target_permissions
, NULL
,
4105 &setlist
, &showlist
);
4107 add_setshow_boolean_cmd ("may-insert-tracepoints", class_support
,
4108 &may_insert_tracepoints_1
, _("\
4109 Set permission to insert tracepoints in the target."), _("\
4110 Show permission to insert tracepoints in the target."), _("\
4111 When this permission is on, GDB may insert tracepoints in the program.\n\
4112 Otherwise, any sort of insertion attempt will result in an error."),
4113 set_target_permissions
, NULL
,
4114 &setlist
, &showlist
);
4116 add_setshow_boolean_cmd ("may-insert-fast-tracepoints", class_support
,
4117 &may_insert_fast_tracepoints_1
, _("\
4118 Set permission to insert fast tracepoints in the target."), _("\
4119 Show permission to insert fast tracepoints in the target."), _("\
4120 When this permission is on, GDB may insert fast tracepoints.\n\
4121 Otherwise, any sort of insertion attempt will result in an error."),
4122 set_target_permissions
, NULL
,
4123 &setlist
, &showlist
);
4125 add_setshow_boolean_cmd ("may-interrupt", class_support
,
4127 Set permission to interrupt or signal the target."), _("\
4128 Show permission to interrupt or signal the target."), _("\
4129 When this permission is on, GDB may interrupt/stop the target's execution.\n\
4130 Otherwise, any attempt to interrupt or stop will be ignored."),
4131 set_target_permissions
, NULL
,
4132 &setlist
, &showlist
);
4134 add_setshow_boolean_cmd ("auto-connect-native-target", class_support
,
4135 &auto_connect_native_target
, _("\
4136 Set whether GDB may automatically connect to the native target."), _("\
4137 Show whether GDB may automatically connect to the native target."), _("\
4138 When on, and GDB is not connected to a target yet, GDB\n\
4139 attempts \"run\" and other commands with the native target."),
4140 NULL
, show_auto_connect_native_target
,
4141 &setlist
, &showlist
);