1 /* Select target systems and architectures at runtime for GDB.
3 Copyright (C) 1990-2014 Free Software Foundation, Inc.
5 Contributed by Cygnus Support.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
24 #include "target-dcache.h"
36 #include "exceptions.h"
37 #include "target-descriptions.h"
38 #include "gdbthread.h"
41 #include "inline-frame.h"
42 #include "tracepoint.h"
43 #include "gdb/fileio.h"
46 #include "target-debug.h"
48 static void target_info (char *, int);
50 static void generic_tls_error (void) ATTRIBUTE_NORETURN
;
52 static void default_terminal_info (struct target_ops
*, const char *, int);
54 static int default_watchpoint_addr_within_range (struct target_ops
*,
55 CORE_ADDR
, CORE_ADDR
, int);
57 static int default_region_ok_for_hw_watchpoint (struct target_ops
*,
60 static void default_rcmd (struct target_ops
*, const char *, struct ui_file
*);
62 static ptid_t
default_get_ada_task_ptid (struct target_ops
*self
,
65 static int default_follow_fork (struct target_ops
*self
, int follow_child
,
68 static void default_mourn_inferior (struct target_ops
*self
);
70 static int default_search_memory (struct target_ops
*ops
,
72 ULONGEST search_space_len
,
73 const gdb_byte
*pattern
,
75 CORE_ADDR
*found_addrp
);
77 static int default_verify_memory (struct target_ops
*self
,
79 CORE_ADDR memaddr
, ULONGEST size
);
81 static struct address_space
*default_thread_address_space
82 (struct target_ops
*self
, ptid_t ptid
);
84 static void tcomplain (void) ATTRIBUTE_NORETURN
;
86 static int return_zero (struct target_ops
*);
88 static int return_zero_has_execution (struct target_ops
*, ptid_t
);
90 static void target_command (char *, int);
92 static struct target_ops
*find_default_run_target (char *);
94 static struct gdbarch
*default_thread_architecture (struct target_ops
*ops
,
97 static int dummy_find_memory_regions (struct target_ops
*self
,
98 find_memory_region_ftype ignore1
,
101 static char *dummy_make_corefile_notes (struct target_ops
*self
,
102 bfd
*ignore1
, int *ignore2
);
104 static char *default_pid_to_str (struct target_ops
*ops
, ptid_t ptid
);
106 static enum exec_direction_kind default_execution_direction
107 (struct target_ops
*self
);
109 static CORE_ADDR
default_target_decr_pc_after_break (struct target_ops
*ops
,
110 struct gdbarch
*gdbarch
);
112 static struct target_ops debug_target
;
114 #include "target-delegates.c"
116 static void init_dummy_target (void);
118 static void update_current_target (void);
120 /* Vector of existing target structures. */
121 typedef struct target_ops
*target_ops_p
;
122 DEF_VEC_P (target_ops_p
);
123 static VEC (target_ops_p
) *target_structs
;
125 /* The initial current target, so that there is always a semi-valid
128 static struct target_ops dummy_target
;
130 /* Top of target stack. */
132 static struct target_ops
*target_stack
;
134 /* The target structure we are currently using to talk to a process
135 or file or whatever "inferior" we have. */
137 struct target_ops current_target
;
139 /* Command list for target. */
141 static struct cmd_list_element
*targetlist
= NULL
;
143 /* Nonzero if we should trust readonly sections from the
144 executable when reading memory. */
146 static int trust_readonly
= 0;
148 /* Nonzero if we should show true memory content including
149 memory breakpoint inserted by gdb. */
151 static int show_memory_breakpoints
= 0;
153 /* These globals control whether GDB attempts to perform these
154 operations; they are useful for targets that need to prevent
155 inadvertant disruption, such as in non-stop mode. */
157 int may_write_registers
= 1;
159 int may_write_memory
= 1;
161 int may_insert_breakpoints
= 1;
163 int may_insert_tracepoints
= 1;
165 int may_insert_fast_tracepoints
= 1;
169 /* Non-zero if we want to see trace of target level stuff. */
171 static unsigned int targetdebug
= 0;
174 set_targetdebug (char *args
, int from_tty
, struct cmd_list_element
*c
)
176 update_current_target ();
180 show_targetdebug (struct ui_file
*file
, int from_tty
,
181 struct cmd_list_element
*c
, const char *value
)
183 fprintf_filtered (file
, _("Target debugging is %s.\n"), value
);
186 static void setup_target_debug (void);
188 /* The user just typed 'target' without the name of a target. */
191 target_command (char *arg
, int from_tty
)
193 fputs_filtered ("Argument required (target name). Try `help target'\n",
197 /* Default target_has_* methods for process_stratum targets. */
200 default_child_has_all_memory (struct target_ops
*ops
)
202 /* If no inferior selected, then we can't read memory here. */
203 if (ptid_equal (inferior_ptid
, null_ptid
))
210 default_child_has_memory (struct target_ops
*ops
)
212 /* If no inferior selected, then we can't read memory here. */
213 if (ptid_equal (inferior_ptid
, null_ptid
))
220 default_child_has_stack (struct target_ops
*ops
)
222 /* If no inferior selected, there's no stack. */
223 if (ptid_equal (inferior_ptid
, null_ptid
))
230 default_child_has_registers (struct target_ops
*ops
)
232 /* Can't read registers from no inferior. */
233 if (ptid_equal (inferior_ptid
, null_ptid
))
240 default_child_has_execution (struct target_ops
*ops
, ptid_t the_ptid
)
242 /* If there's no thread selected, then we can't make it run through
244 if (ptid_equal (the_ptid
, null_ptid
))
252 target_has_all_memory_1 (void)
254 struct target_ops
*t
;
256 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
257 if (t
->to_has_all_memory (t
))
264 target_has_memory_1 (void)
266 struct target_ops
*t
;
268 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
269 if (t
->to_has_memory (t
))
276 target_has_stack_1 (void)
278 struct target_ops
*t
;
280 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
281 if (t
->to_has_stack (t
))
288 target_has_registers_1 (void)
290 struct target_ops
*t
;
292 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
293 if (t
->to_has_registers (t
))
300 target_has_execution_1 (ptid_t the_ptid
)
302 struct target_ops
*t
;
304 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
305 if (t
->to_has_execution (t
, the_ptid
))
312 target_has_execution_current (void)
314 return target_has_execution_1 (inferior_ptid
);
317 /* Complete initialization of T. This ensures that various fields in
318 T are set, if needed by the target implementation. */
321 complete_target_initialization (struct target_ops
*t
)
323 /* Provide default values for all "must have" methods. */
325 if (t
->to_has_all_memory
== NULL
)
326 t
->to_has_all_memory
= return_zero
;
328 if (t
->to_has_memory
== NULL
)
329 t
->to_has_memory
= return_zero
;
331 if (t
->to_has_stack
== NULL
)
332 t
->to_has_stack
= return_zero
;
334 if (t
->to_has_registers
== NULL
)
335 t
->to_has_registers
= return_zero
;
337 if (t
->to_has_execution
== NULL
)
338 t
->to_has_execution
= return_zero_has_execution
;
340 /* These methods can be called on an unpushed target and so require
341 a default implementation if the target might plausibly be the
342 default run target. */
343 gdb_assert (t
->to_can_run
== NULL
|| (t
->to_can_async_p
!= NULL
344 && t
->to_supports_non_stop
!= NULL
));
346 install_delegators (t
);
349 /* This is used to implement the various target commands. */
352 open_target (char *args
, int from_tty
, struct cmd_list_element
*command
)
354 struct target_ops
*ops
= get_cmd_context (command
);
357 fprintf_unfiltered (gdb_stdlog
, "-> %s->to_open (...)\n",
360 ops
->to_open (args
, from_tty
);
363 fprintf_unfiltered (gdb_stdlog
, "<- %s->to_open (%s, %d)\n",
364 ops
->to_shortname
, args
, from_tty
);
367 /* Add possible target architecture T to the list and add a new
368 command 'target T->to_shortname'. Set COMPLETER as the command's
369 completer if not NULL. */
372 add_target_with_completer (struct target_ops
*t
,
373 completer_ftype
*completer
)
375 struct cmd_list_element
*c
;
377 complete_target_initialization (t
);
379 VEC_safe_push (target_ops_p
, target_structs
, t
);
381 if (targetlist
== NULL
)
382 add_prefix_cmd ("target", class_run
, target_command
, _("\
383 Connect to a target machine or process.\n\
384 The first argument is the type or protocol of the target machine.\n\
385 Remaining arguments are interpreted by the target protocol. For more\n\
386 information on the arguments for a particular protocol, type\n\
387 `help target ' followed by the protocol name."),
388 &targetlist
, "target ", 0, &cmdlist
);
389 c
= add_cmd (t
->to_shortname
, no_class
, NULL
, t
->to_doc
, &targetlist
);
390 set_cmd_sfunc (c
, open_target
);
391 set_cmd_context (c
, t
);
392 if (completer
!= NULL
)
393 set_cmd_completer (c
, completer
);
396 /* Add a possible target architecture to the list. */
399 add_target (struct target_ops
*t
)
401 add_target_with_completer (t
, NULL
);
407 add_deprecated_target_alias (struct target_ops
*t
, char *alias
)
409 struct cmd_list_element
*c
;
412 /* If we use add_alias_cmd, here, we do not get the deprecated warning,
414 c
= add_cmd (alias
, no_class
, NULL
, t
->to_doc
, &targetlist
);
415 set_cmd_sfunc (c
, open_target
);
416 set_cmd_context (c
, t
);
417 alt
= xstrprintf ("target %s", t
->to_shortname
);
418 deprecate_cmd (c
, alt
);
426 current_target
.to_kill (¤t_target
);
430 target_load (const char *arg
, int from_tty
)
432 target_dcache_invalidate ();
433 (*current_target
.to_load
) (¤t_target
, arg
, from_tty
);
437 target_terminal_inferior (void)
439 /* A background resume (``run&'') should leave GDB in control of the
440 terminal. Use target_can_async_p, not target_is_async_p, since at
441 this point the target is not async yet. However, if sync_execution
442 is not set, we know it will become async prior to resume. */
443 if (target_can_async_p () && !sync_execution
)
446 /* If GDB is resuming the inferior in the foreground, install
447 inferior's terminal modes. */
448 (*current_target
.to_terminal_inferior
) (¤t_target
);
454 target_supports_terminal_ours (void)
456 struct target_ops
*t
;
458 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
460 if (t
->to_terminal_ours
!= delegate_terminal_ours
461 && t
->to_terminal_ours
!= tdefault_terminal_ours
)
471 error (_("You can't do that when your target is `%s'"),
472 current_target
.to_shortname
);
478 error (_("You can't do that without a process to debug."));
482 default_terminal_info (struct target_ops
*self
, const char *args
, int from_tty
)
484 printf_unfiltered (_("No saved terminal information.\n"));
487 /* A default implementation for the to_get_ada_task_ptid target method.
489 This function builds the PTID by using both LWP and TID as part of
490 the PTID lwp and tid elements. The pid used is the pid of the
494 default_get_ada_task_ptid (struct target_ops
*self
, long lwp
, long tid
)
496 return ptid_build (ptid_get_pid (inferior_ptid
), lwp
, tid
);
499 static enum exec_direction_kind
500 default_execution_direction (struct target_ops
*self
)
502 if (!target_can_execute_reverse
)
504 else if (!target_can_async_p ())
507 gdb_assert_not_reached ("\
508 to_execution_direction must be implemented for reverse async");
511 /* Go through the target stack from top to bottom, copying over zero
512 entries in current_target, then filling in still empty entries. In
513 effect, we are doing class inheritance through the pushed target
516 NOTE: cagney/2003-10-17: The problem with this inheritance, as it
517 is currently implemented, is that it discards any knowledge of
518 which target an inherited method originally belonged to.
519 Consequently, new new target methods should instead explicitly and
520 locally search the target stack for the target that can handle the
524 update_current_target (void)
526 struct target_ops
*t
;
528 /* First, reset current's contents. */
529 memset (¤t_target
, 0, sizeof (current_target
));
531 /* Install the delegators. */
532 install_delegators (¤t_target
);
534 current_target
.to_stratum
= target_stack
->to_stratum
;
536 #define INHERIT(FIELD, TARGET) \
537 if (!current_target.FIELD) \
538 current_target.FIELD = (TARGET)->FIELD
540 /* Do not add any new INHERITs here. Instead, use the delegation
541 mechanism provided by make-target-delegates. */
542 for (t
= target_stack
; t
; t
= t
->beneath
)
544 INHERIT (to_shortname
, t
);
545 INHERIT (to_longname
, t
);
546 INHERIT (to_attach_no_wait
, t
);
547 INHERIT (to_have_steppable_watchpoint
, t
);
548 INHERIT (to_have_continuable_watchpoint
, t
);
549 INHERIT (to_has_thread_control
, t
);
553 /* Finally, position the target-stack beneath the squashed
554 "current_target". That way code looking for a non-inherited
555 target method can quickly and simply find it. */
556 current_target
.beneath
= target_stack
;
559 setup_target_debug ();
562 /* Push a new target type into the stack of the existing target accessors,
563 possibly superseding some of the existing accessors.
565 Rather than allow an empty stack, we always have the dummy target at
566 the bottom stratum, so we can call the function vectors without
570 push_target (struct target_ops
*t
)
572 struct target_ops
**cur
;
574 /* Check magic number. If wrong, it probably means someone changed
575 the struct definition, but not all the places that initialize one. */
576 if (t
->to_magic
!= OPS_MAGIC
)
578 fprintf_unfiltered (gdb_stderr
,
579 "Magic number of %s target struct wrong\n",
581 internal_error (__FILE__
, __LINE__
,
582 _("failed internal consistency check"));
585 /* Find the proper stratum to install this target in. */
586 for (cur
= &target_stack
; (*cur
) != NULL
; cur
= &(*cur
)->beneath
)
588 if ((int) (t
->to_stratum
) >= (int) (*cur
)->to_stratum
)
592 /* If there's already targets at this stratum, remove them. */
593 /* FIXME: cagney/2003-10-15: I think this should be popping all
594 targets to CUR, and not just those at this stratum level. */
595 while ((*cur
) != NULL
&& t
->to_stratum
== (*cur
)->to_stratum
)
597 /* There's already something at this stratum level. Close it,
598 and un-hook it from the stack. */
599 struct target_ops
*tmp
= (*cur
);
601 (*cur
) = (*cur
)->beneath
;
606 /* We have removed all targets in our stratum, now add the new one. */
610 update_current_target ();
613 /* Remove a target_ops vector from the stack, wherever it may be.
614 Return how many times it was removed (0 or 1). */
617 unpush_target (struct target_ops
*t
)
619 struct target_ops
**cur
;
620 struct target_ops
*tmp
;
622 if (t
->to_stratum
== dummy_stratum
)
623 internal_error (__FILE__
, __LINE__
,
624 _("Attempt to unpush the dummy target"));
626 /* Look for the specified target. Note that we assume that a target
627 can only occur once in the target stack. */
629 for (cur
= &target_stack
; (*cur
) != NULL
; cur
= &(*cur
)->beneath
)
635 /* If we don't find target_ops, quit. Only open targets should be
640 /* Unchain the target. */
642 (*cur
) = (*cur
)->beneath
;
645 update_current_target ();
647 /* Finally close the target. Note we do this after unchaining, so
648 any target method calls from within the target_close
649 implementation don't end up in T anymore. */
656 pop_all_targets_above (enum strata above_stratum
)
658 while ((int) (current_target
.to_stratum
) > (int) above_stratum
)
660 if (!unpush_target (target_stack
))
662 fprintf_unfiltered (gdb_stderr
,
663 "pop_all_targets couldn't find target %s\n",
664 target_stack
->to_shortname
);
665 internal_error (__FILE__
, __LINE__
,
666 _("failed internal consistency check"));
673 pop_all_targets (void)
675 pop_all_targets_above (dummy_stratum
);
678 /* Return 1 if T is now pushed in the target stack. Return 0 otherwise. */
681 target_is_pushed (struct target_ops
*t
)
683 struct target_ops
*cur
;
685 /* Check magic number. If wrong, it probably means someone changed
686 the struct definition, but not all the places that initialize one. */
687 if (t
->to_magic
!= OPS_MAGIC
)
689 fprintf_unfiltered (gdb_stderr
,
690 "Magic number of %s target struct wrong\n",
692 internal_error (__FILE__
, __LINE__
,
693 _("failed internal consistency check"));
696 for (cur
= target_stack
; cur
!= NULL
; cur
= cur
->beneath
)
703 /* Default implementation of to_get_thread_local_address. */
706 generic_tls_error (void)
708 throw_error (TLS_GENERIC_ERROR
,
709 _("Cannot find thread-local variables on this target"));
712 /* Using the objfile specified in OBJFILE, find the address for the
713 current thread's thread-local storage with offset OFFSET. */
715 target_translate_tls_address (struct objfile
*objfile
, CORE_ADDR offset
)
717 volatile CORE_ADDR addr
= 0;
718 struct target_ops
*target
= ¤t_target
;
720 if (gdbarch_fetch_tls_load_module_address_p (target_gdbarch ()))
722 ptid_t ptid
= inferior_ptid
;
723 volatile struct gdb_exception ex
;
725 TRY_CATCH (ex
, RETURN_MASK_ALL
)
729 /* Fetch the load module address for this objfile. */
730 lm_addr
= gdbarch_fetch_tls_load_module_address (target_gdbarch (),
733 addr
= target
->to_get_thread_local_address (target
, ptid
,
736 /* If an error occurred, print TLS related messages here. Otherwise,
737 throw the error to some higher catcher. */
740 int objfile_is_library
= (objfile
->flags
& OBJF_SHARED
);
744 case TLS_NO_LIBRARY_SUPPORT_ERROR
:
745 error (_("Cannot find thread-local variables "
746 "in this thread library."));
748 case TLS_LOAD_MODULE_NOT_FOUND_ERROR
:
749 if (objfile_is_library
)
750 error (_("Cannot find shared library `%s' in dynamic"
751 " linker's load module list"), objfile_name (objfile
));
753 error (_("Cannot find executable file `%s' in dynamic"
754 " linker's load module list"), objfile_name (objfile
));
756 case TLS_NOT_ALLOCATED_YET_ERROR
:
757 if (objfile_is_library
)
758 error (_("The inferior has not yet allocated storage for"
759 " thread-local variables in\n"
760 "the shared library `%s'\n"
762 objfile_name (objfile
), target_pid_to_str (ptid
));
764 error (_("The inferior has not yet allocated storage for"
765 " thread-local variables in\n"
766 "the executable `%s'\n"
768 objfile_name (objfile
), target_pid_to_str (ptid
));
770 case TLS_GENERIC_ERROR
:
771 if (objfile_is_library
)
772 error (_("Cannot find thread-local storage for %s, "
773 "shared library %s:\n%s"),
774 target_pid_to_str (ptid
),
775 objfile_name (objfile
), ex
.message
);
777 error (_("Cannot find thread-local storage for %s, "
778 "executable file %s:\n%s"),
779 target_pid_to_str (ptid
),
780 objfile_name (objfile
), ex
.message
);
783 throw_exception (ex
);
788 /* It wouldn't be wrong here to try a gdbarch method, too; finding
789 TLS is an ABI-specific thing. But we don't do that yet. */
791 error (_("Cannot find thread-local variables on this target"));
797 target_xfer_status_to_string (enum target_xfer_status status
)
799 #define CASE(X) case X: return #X
802 CASE(TARGET_XFER_E_IO
);
803 CASE(TARGET_XFER_UNAVAILABLE
);
812 #define MIN(A, B) (((A) <= (B)) ? (A) : (B))
814 /* target_read_string -- read a null terminated string, up to LEN bytes,
815 from MEMADDR in target. Set *ERRNOP to the errno code, or 0 if successful.
816 Set *STRING to a pointer to malloc'd memory containing the data; the caller
817 is responsible for freeing it. Return the number of bytes successfully
821 target_read_string (CORE_ADDR memaddr
, char **string
, int len
, int *errnop
)
827 int buffer_allocated
;
829 unsigned int nbytes_read
= 0;
833 /* Small for testing. */
834 buffer_allocated
= 4;
835 buffer
= xmalloc (buffer_allocated
);
840 tlen
= MIN (len
, 4 - (memaddr
& 3));
841 offset
= memaddr
& 3;
843 errcode
= target_read_memory (memaddr
& ~3, buf
, sizeof buf
);
846 /* The transfer request might have crossed the boundary to an
847 unallocated region of memory. Retry the transfer, requesting
851 errcode
= target_read_memory (memaddr
, buf
, 1);
856 if (bufptr
- buffer
+ tlen
> buffer_allocated
)
860 bytes
= bufptr
- buffer
;
861 buffer_allocated
*= 2;
862 buffer
= xrealloc (buffer
, buffer_allocated
);
863 bufptr
= buffer
+ bytes
;
866 for (i
= 0; i
< tlen
; i
++)
868 *bufptr
++ = buf
[i
+ offset
];
869 if (buf
[i
+ offset
] == '\000')
871 nbytes_read
+= i
+ 1;
887 struct target_section_table
*
888 target_get_section_table (struct target_ops
*target
)
890 return (*target
->to_get_section_table
) (target
);
893 /* Find a section containing ADDR. */
895 struct target_section
*
896 target_section_by_addr (struct target_ops
*target
, CORE_ADDR addr
)
898 struct target_section_table
*table
= target_get_section_table (target
);
899 struct target_section
*secp
;
904 for (secp
= table
->sections
; secp
< table
->sections_end
; secp
++)
906 if (addr
>= secp
->addr
&& addr
< secp
->endaddr
)
912 /* Read memory from more than one valid target. A core file, for
913 instance, could have some of memory but delegate other bits to
914 the target below it. So, we must manually try all targets. */
916 static enum target_xfer_status
917 raw_memory_xfer_partial (struct target_ops
*ops
, gdb_byte
*readbuf
,
918 const gdb_byte
*writebuf
, ULONGEST memaddr
, LONGEST len
,
919 ULONGEST
*xfered_len
)
921 enum target_xfer_status res
;
925 res
= ops
->to_xfer_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
926 readbuf
, writebuf
, memaddr
, len
,
928 if (res
== TARGET_XFER_OK
)
931 /* Stop if the target reports that the memory is not available. */
932 if (res
== TARGET_XFER_UNAVAILABLE
)
935 /* We want to continue past core files to executables, but not
936 past a running target's memory. */
937 if (ops
->to_has_all_memory (ops
))
944 /* The cache works at the raw memory level. Make sure the cache
945 gets updated with raw contents no matter what kind of memory
946 object was originally being written. Note we do write-through
947 first, so that if it fails, we don't write to the cache contents
948 that never made it to the target. */
950 && !ptid_equal (inferior_ptid
, null_ptid
)
951 && target_dcache_init_p ()
952 && (stack_cache_enabled_p () || code_cache_enabled_p ()))
954 DCACHE
*dcache
= target_dcache_get ();
956 /* Note that writing to an area of memory which wasn't present
957 in the cache doesn't cause it to be loaded in. */
958 dcache_update (dcache
, res
, memaddr
, writebuf
, *xfered_len
);
964 /* Perform a partial memory transfer.
965 For docs see target.h, to_xfer_partial. */
967 static enum target_xfer_status
968 memory_xfer_partial_1 (struct target_ops
*ops
, enum target_object object
,
969 gdb_byte
*readbuf
, const gdb_byte
*writebuf
, ULONGEST memaddr
,
970 ULONGEST len
, ULONGEST
*xfered_len
)
972 enum target_xfer_status res
;
974 struct mem_region
*region
;
975 struct inferior
*inf
;
977 /* For accesses to unmapped overlay sections, read directly from
978 files. Must do this first, as MEMADDR may need adjustment. */
979 if (readbuf
!= NULL
&& overlay_debugging
)
981 struct obj_section
*section
= find_pc_overlay (memaddr
);
983 if (pc_in_unmapped_range (memaddr
, section
))
985 struct target_section_table
*table
986 = target_get_section_table (ops
);
987 const char *section_name
= section
->the_bfd_section
->name
;
989 memaddr
= overlay_mapped_address (memaddr
, section
);
990 return section_table_xfer_memory_partial (readbuf
, writebuf
,
991 memaddr
, len
, xfered_len
,
998 /* Try the executable files, if "trust-readonly-sections" is set. */
999 if (readbuf
!= NULL
&& trust_readonly
)
1001 struct target_section
*secp
;
1002 struct target_section_table
*table
;
1004 secp
= target_section_by_addr (ops
, memaddr
);
1006 && (bfd_get_section_flags (secp
->the_bfd_section
->owner
,
1007 secp
->the_bfd_section
)
1010 table
= target_get_section_table (ops
);
1011 return section_table_xfer_memory_partial (readbuf
, writebuf
,
1012 memaddr
, len
, xfered_len
,
1014 table
->sections_end
,
1019 /* Try GDB's internal data cache. */
1020 region
= lookup_mem_region (memaddr
);
1021 /* region->hi == 0 means there's no upper bound. */
1022 if (memaddr
+ len
< region
->hi
|| region
->hi
== 0)
1025 reg_len
= region
->hi
- memaddr
;
1027 switch (region
->attrib
.mode
)
1030 if (writebuf
!= NULL
)
1031 return TARGET_XFER_E_IO
;
1035 if (readbuf
!= NULL
)
1036 return TARGET_XFER_E_IO
;
1040 /* We only support writing to flash during "load" for now. */
1041 if (writebuf
!= NULL
)
1042 error (_("Writing to flash memory forbidden in this context"));
1046 return TARGET_XFER_E_IO
;
1049 if (!ptid_equal (inferior_ptid
, null_ptid
))
1050 inf
= find_inferior_pid (ptid_get_pid (inferior_ptid
));
1056 /* The dcache reads whole cache lines; that doesn't play well
1057 with reading from a trace buffer, because reading outside of
1058 the collected memory range fails. */
1059 && get_traceframe_number () == -1
1060 && (region
->attrib
.cache
1061 || (stack_cache_enabled_p () && object
== TARGET_OBJECT_STACK_MEMORY
)
1062 || (code_cache_enabled_p () && object
== TARGET_OBJECT_CODE_MEMORY
)))
1064 DCACHE
*dcache
= target_dcache_get_or_init ();
1066 return dcache_read_memory_partial (ops
, dcache
, memaddr
, readbuf
,
1067 reg_len
, xfered_len
);
1070 /* If none of those methods found the memory we wanted, fall back
1071 to a target partial transfer. Normally a single call to
1072 to_xfer_partial is enough; if it doesn't recognize an object
1073 it will call the to_xfer_partial of the next target down.
1074 But for memory this won't do. Memory is the only target
1075 object which can be read from more than one valid target.
1076 A core file, for instance, could have some of memory but
1077 delegate other bits to the target below it. So, we must
1078 manually try all targets. */
1080 res
= raw_memory_xfer_partial (ops
, readbuf
, writebuf
, memaddr
, reg_len
,
1083 /* If we still haven't got anything, return the last error. We
1088 /* Perform a partial memory transfer. For docs see target.h,
1091 static enum target_xfer_status
1092 memory_xfer_partial (struct target_ops
*ops
, enum target_object object
,
1093 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1094 ULONGEST memaddr
, ULONGEST len
, ULONGEST
*xfered_len
)
1096 enum target_xfer_status res
;
1098 /* Zero length requests are ok and require no work. */
1100 return TARGET_XFER_EOF
;
1102 /* Fill in READBUF with breakpoint shadows, or WRITEBUF with
1103 breakpoint insns, thus hiding out from higher layers whether
1104 there are software breakpoints inserted in the code stream. */
1105 if (readbuf
!= NULL
)
1107 res
= memory_xfer_partial_1 (ops
, object
, readbuf
, NULL
, memaddr
, len
,
1110 if (res
== TARGET_XFER_OK
&& !show_memory_breakpoints
)
1111 breakpoint_xfer_memory (readbuf
, NULL
, NULL
, memaddr
, *xfered_len
);
1116 struct cleanup
*old_chain
;
1118 /* A large write request is likely to be partially satisfied
1119 by memory_xfer_partial_1. We will continually malloc
1120 and free a copy of the entire write request for breakpoint
1121 shadow handling even though we only end up writing a small
1122 subset of it. Cap writes to 4KB to mitigate this. */
1123 len
= min (4096, len
);
1125 buf
= xmalloc (len
);
1126 old_chain
= make_cleanup (xfree
, buf
);
1127 memcpy (buf
, writebuf
, len
);
1129 breakpoint_xfer_memory (NULL
, buf
, writebuf
, memaddr
, len
);
1130 res
= memory_xfer_partial_1 (ops
, object
, NULL
, buf
, memaddr
, len
,
1133 do_cleanups (old_chain
);
1140 restore_show_memory_breakpoints (void *arg
)
1142 show_memory_breakpoints
= (uintptr_t) arg
;
1146 make_show_memory_breakpoints_cleanup (int show
)
1148 int current
= show_memory_breakpoints
;
1150 show_memory_breakpoints
= show
;
1151 return make_cleanup (restore_show_memory_breakpoints
,
1152 (void *) (uintptr_t) current
);
1155 /* For docs see target.h, to_xfer_partial. */
1157 enum target_xfer_status
1158 target_xfer_partial (struct target_ops
*ops
,
1159 enum target_object object
, const char *annex
,
1160 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1161 ULONGEST offset
, ULONGEST len
,
1162 ULONGEST
*xfered_len
)
1164 enum target_xfer_status retval
;
1166 gdb_assert (ops
->to_xfer_partial
!= NULL
);
1168 /* Transfer is done when LEN is zero. */
1170 return TARGET_XFER_EOF
;
1172 if (writebuf
&& !may_write_memory
)
1173 error (_("Writing to memory is not allowed (addr %s, len %s)"),
1174 core_addr_to_string_nz (offset
), plongest (len
));
1178 /* If this is a memory transfer, let the memory-specific code
1179 have a look at it instead. Memory transfers are more
1181 if (object
== TARGET_OBJECT_MEMORY
|| object
== TARGET_OBJECT_STACK_MEMORY
1182 || object
== TARGET_OBJECT_CODE_MEMORY
)
1183 retval
= memory_xfer_partial (ops
, object
, readbuf
,
1184 writebuf
, offset
, len
, xfered_len
);
1185 else if (object
== TARGET_OBJECT_RAW_MEMORY
)
1187 /* Request the normal memory object from other layers. */
1188 retval
= raw_memory_xfer_partial (ops
, readbuf
, writebuf
, offset
, len
,
1192 retval
= ops
->to_xfer_partial (ops
, object
, annex
, readbuf
,
1193 writebuf
, offset
, len
, xfered_len
);
1197 const unsigned char *myaddr
= NULL
;
1199 fprintf_unfiltered (gdb_stdlog
,
1200 "%s:target_xfer_partial "
1201 "(%d, %s, %s, %s, %s, %s) = %d, %s",
1204 (annex
? annex
: "(null)"),
1205 host_address_to_string (readbuf
),
1206 host_address_to_string (writebuf
),
1207 core_addr_to_string_nz (offset
),
1208 pulongest (len
), retval
,
1209 pulongest (*xfered_len
));
1215 if (retval
== TARGET_XFER_OK
&& myaddr
!= NULL
)
1219 fputs_unfiltered (", bytes =", gdb_stdlog
);
1220 for (i
= 0; i
< *xfered_len
; i
++)
1222 if ((((intptr_t) &(myaddr
[i
])) & 0xf) == 0)
1224 if (targetdebug
< 2 && i
> 0)
1226 fprintf_unfiltered (gdb_stdlog
, " ...");
1229 fprintf_unfiltered (gdb_stdlog
, "\n");
1232 fprintf_unfiltered (gdb_stdlog
, " %02x", myaddr
[i
] & 0xff);
1236 fputc_unfiltered ('\n', gdb_stdlog
);
1239 /* Check implementations of to_xfer_partial update *XFERED_LEN
1240 properly. Do assertion after printing debug messages, so that we
1241 can find more clues on assertion failure from debugging messages. */
1242 if (retval
== TARGET_XFER_OK
|| retval
== TARGET_XFER_UNAVAILABLE
)
1243 gdb_assert (*xfered_len
> 0);
1248 /* Read LEN bytes of target memory at address MEMADDR, placing the
1249 results in GDB's memory at MYADDR. Returns either 0 for success or
1250 TARGET_XFER_E_IO if any error occurs.
1252 If an error occurs, no guarantee is made about the contents of the data at
1253 MYADDR. In particular, the caller should not depend upon partial reads
1254 filling the buffer with good data. There is no way for the caller to know
1255 how much good data might have been transfered anyway. Callers that can
1256 deal with partial reads should call target_read (which will retry until
1257 it makes no progress, and then return how much was transferred). */
1260 target_read_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1262 /* Dispatch to the topmost target, not the flattened current_target.
1263 Memory accesses check target->to_has_(all_)memory, and the
1264 flattened target doesn't inherit those. */
1265 if (target_read (current_target
.beneath
, TARGET_OBJECT_MEMORY
, NULL
,
1266 myaddr
, memaddr
, len
) == len
)
1269 return TARGET_XFER_E_IO
;
1272 /* Like target_read_memory, but specify explicitly that this is a read
1273 from the target's raw memory. That is, this read bypasses the
1274 dcache, breakpoint shadowing, etc. */
1277 target_read_raw_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1279 /* See comment in target_read_memory about why the request starts at
1280 current_target.beneath. */
1281 if (target_read (current_target
.beneath
, TARGET_OBJECT_RAW_MEMORY
, NULL
,
1282 myaddr
, memaddr
, len
) == len
)
1285 return TARGET_XFER_E_IO
;
1288 /* Like target_read_memory, but specify explicitly that this is a read from
1289 the target's stack. This may trigger different cache behavior. */
1292 target_read_stack (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1294 /* See comment in target_read_memory about why the request starts at
1295 current_target.beneath. */
1296 if (target_read (current_target
.beneath
, TARGET_OBJECT_STACK_MEMORY
, NULL
,
1297 myaddr
, memaddr
, len
) == len
)
1300 return TARGET_XFER_E_IO
;
1303 /* Like target_read_memory, but specify explicitly that this is a read from
1304 the target's code. This may trigger different cache behavior. */
1307 target_read_code (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1309 /* See comment in target_read_memory about why the request starts at
1310 current_target.beneath. */
1311 if (target_read (current_target
.beneath
, TARGET_OBJECT_CODE_MEMORY
, NULL
,
1312 myaddr
, memaddr
, len
) == len
)
1315 return TARGET_XFER_E_IO
;
1318 /* Write LEN bytes from MYADDR to target memory at address MEMADDR.
1319 Returns either 0 for success or TARGET_XFER_E_IO if any
1320 error occurs. If an error occurs, no guarantee is made about how
1321 much data got written. Callers that can deal with partial writes
1322 should call target_write. */
1325 target_write_memory (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ssize_t len
)
1327 /* See comment in target_read_memory about why the request starts at
1328 current_target.beneath. */
1329 if (target_write (current_target
.beneath
, TARGET_OBJECT_MEMORY
, NULL
,
1330 myaddr
, memaddr
, len
) == len
)
1333 return TARGET_XFER_E_IO
;
1336 /* Write LEN bytes from MYADDR to target raw memory at address
1337 MEMADDR. Returns either 0 for success or TARGET_XFER_E_IO
1338 if any error occurs. If an error occurs, no guarantee is made
1339 about how much data got written. Callers that can deal with
1340 partial writes should call target_write. */
1343 target_write_raw_memory (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ssize_t len
)
1345 /* See comment in target_read_memory about why the request starts at
1346 current_target.beneath. */
1347 if (target_write (current_target
.beneath
, TARGET_OBJECT_RAW_MEMORY
, NULL
,
1348 myaddr
, memaddr
, len
) == len
)
1351 return TARGET_XFER_E_IO
;
1354 /* Fetch the target's memory map. */
1357 target_memory_map (void)
1359 VEC(mem_region_s
) *result
;
1360 struct mem_region
*last_one
, *this_one
;
1362 struct target_ops
*t
;
1364 result
= current_target
.to_memory_map (¤t_target
);
1368 qsort (VEC_address (mem_region_s
, result
),
1369 VEC_length (mem_region_s
, result
),
1370 sizeof (struct mem_region
), mem_region_cmp
);
1372 /* Check that regions do not overlap. Simultaneously assign
1373 a numbering for the "mem" commands to use to refer to
1376 for (ix
= 0; VEC_iterate (mem_region_s
, result
, ix
, this_one
); ix
++)
1378 this_one
->number
= ix
;
1380 if (last_one
&& last_one
->hi
> this_one
->lo
)
1382 warning (_("Overlapping regions in memory map: ignoring"));
1383 VEC_free (mem_region_s
, result
);
1386 last_one
= this_one
;
1393 target_flash_erase (ULONGEST address
, LONGEST length
)
1395 current_target
.to_flash_erase (¤t_target
, address
, length
);
1399 target_flash_done (void)
1401 current_target
.to_flash_done (¤t_target
);
1405 show_trust_readonly (struct ui_file
*file
, int from_tty
,
1406 struct cmd_list_element
*c
, const char *value
)
1408 fprintf_filtered (file
,
1409 _("Mode for reading from readonly sections is %s.\n"),
1413 /* Target vector read/write partial wrapper functions. */
1415 static enum target_xfer_status
1416 target_read_partial (struct target_ops
*ops
,
1417 enum target_object object
,
1418 const char *annex
, gdb_byte
*buf
,
1419 ULONGEST offset
, ULONGEST len
,
1420 ULONGEST
*xfered_len
)
1422 return target_xfer_partial (ops
, object
, annex
, buf
, NULL
, offset
, len
,
1426 static enum target_xfer_status
1427 target_write_partial (struct target_ops
*ops
,
1428 enum target_object object
,
1429 const char *annex
, const gdb_byte
*buf
,
1430 ULONGEST offset
, LONGEST len
, ULONGEST
*xfered_len
)
1432 return target_xfer_partial (ops
, object
, annex
, NULL
, buf
, offset
, len
,
1436 /* Wrappers to perform the full transfer. */
1438 /* For docs on target_read see target.h. */
1441 target_read (struct target_ops
*ops
,
1442 enum target_object object
,
1443 const char *annex
, gdb_byte
*buf
,
1444 ULONGEST offset
, LONGEST len
)
1448 while (xfered
< len
)
1450 ULONGEST xfered_len
;
1451 enum target_xfer_status status
;
1453 status
= target_read_partial (ops
, object
, annex
,
1454 (gdb_byte
*) buf
+ xfered
,
1455 offset
+ xfered
, len
- xfered
,
1458 /* Call an observer, notifying them of the xfer progress? */
1459 if (status
== TARGET_XFER_EOF
)
1461 else if (status
== TARGET_XFER_OK
)
1463 xfered
+= xfered_len
;
1473 /* Assuming that the entire [begin, end) range of memory cannot be
1474 read, try to read whatever subrange is possible to read.
1476 The function returns, in RESULT, either zero or one memory block.
1477 If there's a readable subrange at the beginning, it is completely
1478 read and returned. Any further readable subrange will not be read.
1479 Otherwise, if there's a readable subrange at the end, it will be
1480 completely read and returned. Any readable subranges before it
1481 (obviously, not starting at the beginning), will be ignored. In
1482 other cases -- either no readable subrange, or readable subrange(s)
1483 that is neither at the beginning, or end, nothing is returned.
1485 The purpose of this function is to handle a read across a boundary
1486 of accessible memory in a case when memory map is not available.
1487 The above restrictions are fine for this case, but will give
1488 incorrect results if the memory is 'patchy'. However, supporting
1489 'patchy' memory would require trying to read every single byte,
1490 and it seems unacceptable solution. Explicit memory map is
1491 recommended for this case -- and target_read_memory_robust will
1492 take care of reading multiple ranges then. */
1495 read_whatever_is_readable (struct target_ops
*ops
,
1496 ULONGEST begin
, ULONGEST end
,
1497 VEC(memory_read_result_s
) **result
)
1499 gdb_byte
*buf
= xmalloc (end
- begin
);
1500 ULONGEST current_begin
= begin
;
1501 ULONGEST current_end
= end
;
1503 memory_read_result_s r
;
1504 ULONGEST xfered_len
;
1506 /* If we previously failed to read 1 byte, nothing can be done here. */
1507 if (end
- begin
<= 1)
1513 /* Check that either first or the last byte is readable, and give up
1514 if not. This heuristic is meant to permit reading accessible memory
1515 at the boundary of accessible region. */
1516 if (target_read_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1517 buf
, begin
, 1, &xfered_len
) == TARGET_XFER_OK
)
1522 else if (target_read_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1523 buf
+ (end
-begin
) - 1, end
- 1, 1,
1524 &xfered_len
) == TARGET_XFER_OK
)
1535 /* Loop invariant is that the [current_begin, current_end) was previously
1536 found to be not readable as a whole.
1538 Note loop condition -- if the range has 1 byte, we can't divide the range
1539 so there's no point trying further. */
1540 while (current_end
- current_begin
> 1)
1542 ULONGEST first_half_begin
, first_half_end
;
1543 ULONGEST second_half_begin
, second_half_end
;
1545 ULONGEST middle
= current_begin
+ (current_end
- current_begin
)/2;
1549 first_half_begin
= current_begin
;
1550 first_half_end
= middle
;
1551 second_half_begin
= middle
;
1552 second_half_end
= current_end
;
1556 first_half_begin
= middle
;
1557 first_half_end
= current_end
;
1558 second_half_begin
= current_begin
;
1559 second_half_end
= middle
;
1562 xfer
= target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1563 buf
+ (first_half_begin
- begin
),
1565 first_half_end
- first_half_begin
);
1567 if (xfer
== first_half_end
- first_half_begin
)
1569 /* This half reads up fine. So, the error must be in the
1571 current_begin
= second_half_begin
;
1572 current_end
= second_half_end
;
1576 /* This half is not readable. Because we've tried one byte, we
1577 know some part of this half if actually redable. Go to the next
1578 iteration to divide again and try to read.
1580 We don't handle the other half, because this function only tries
1581 to read a single readable subrange. */
1582 current_begin
= first_half_begin
;
1583 current_end
= first_half_end
;
1589 /* The [begin, current_begin) range has been read. */
1591 r
.end
= current_begin
;
1596 /* The [current_end, end) range has been read. */
1597 LONGEST rlen
= end
- current_end
;
1599 r
.data
= xmalloc (rlen
);
1600 memcpy (r
.data
, buf
+ current_end
- begin
, rlen
);
1601 r
.begin
= current_end
;
1605 VEC_safe_push(memory_read_result_s
, (*result
), &r
);
1609 free_memory_read_result_vector (void *x
)
1611 VEC(memory_read_result_s
) *v
= x
;
1612 memory_read_result_s
*current
;
1615 for (ix
= 0; VEC_iterate (memory_read_result_s
, v
, ix
, current
); ++ix
)
1617 xfree (current
->data
);
1619 VEC_free (memory_read_result_s
, v
);
1622 VEC(memory_read_result_s
) *
1623 read_memory_robust (struct target_ops
*ops
, ULONGEST offset
, LONGEST len
)
1625 VEC(memory_read_result_s
) *result
= 0;
1628 while (xfered
< len
)
1630 struct mem_region
*region
= lookup_mem_region (offset
+ xfered
);
1633 /* If there is no explicit region, a fake one should be created. */
1634 gdb_assert (region
);
1636 if (region
->hi
== 0)
1637 rlen
= len
- xfered
;
1639 rlen
= region
->hi
- offset
;
1641 if (region
->attrib
.mode
== MEM_NONE
|| region
->attrib
.mode
== MEM_WO
)
1643 /* Cannot read this region. Note that we can end up here only
1644 if the region is explicitly marked inaccessible, or
1645 'inaccessible-by-default' is in effect. */
1650 LONGEST to_read
= min (len
- xfered
, rlen
);
1651 gdb_byte
*buffer
= (gdb_byte
*)xmalloc (to_read
);
1653 LONGEST xfer
= target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1654 (gdb_byte
*) buffer
,
1655 offset
+ xfered
, to_read
);
1656 /* Call an observer, notifying them of the xfer progress? */
1659 /* Got an error reading full chunk. See if maybe we can read
1662 read_whatever_is_readable (ops
, offset
+ xfered
,
1663 offset
+ xfered
+ to_read
, &result
);
1668 struct memory_read_result r
;
1670 r
.begin
= offset
+ xfered
;
1671 r
.end
= r
.begin
+ xfer
;
1672 VEC_safe_push (memory_read_result_s
, result
, &r
);
1682 /* An alternative to target_write with progress callbacks. */
1685 target_write_with_progress (struct target_ops
*ops
,
1686 enum target_object object
,
1687 const char *annex
, const gdb_byte
*buf
,
1688 ULONGEST offset
, LONGEST len
,
1689 void (*progress
) (ULONGEST
, void *), void *baton
)
1693 /* Give the progress callback a chance to set up. */
1695 (*progress
) (0, baton
);
1697 while (xfered
< len
)
1699 ULONGEST xfered_len
;
1700 enum target_xfer_status status
;
1702 status
= target_write_partial (ops
, object
, annex
,
1703 (gdb_byte
*) buf
+ xfered
,
1704 offset
+ xfered
, len
- xfered
,
1707 if (status
!= TARGET_XFER_OK
)
1708 return status
== TARGET_XFER_EOF
? xfered
: -1;
1711 (*progress
) (xfered_len
, baton
);
1713 xfered
+= xfered_len
;
1719 /* For docs on target_write see target.h. */
1722 target_write (struct target_ops
*ops
,
1723 enum target_object object
,
1724 const char *annex
, const gdb_byte
*buf
,
1725 ULONGEST offset
, LONGEST len
)
1727 return target_write_with_progress (ops
, object
, annex
, buf
, offset
, len
,
1731 /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return
1732 the size of the transferred data. PADDING additional bytes are
1733 available in *BUF_P. This is a helper function for
1734 target_read_alloc; see the declaration of that function for more
1738 target_read_alloc_1 (struct target_ops
*ops
, enum target_object object
,
1739 const char *annex
, gdb_byte
**buf_p
, int padding
)
1741 size_t buf_alloc
, buf_pos
;
1744 /* This function does not have a length parameter; it reads the
1745 entire OBJECT). Also, it doesn't support objects fetched partly
1746 from one target and partly from another (in a different stratum,
1747 e.g. a core file and an executable). Both reasons make it
1748 unsuitable for reading memory. */
1749 gdb_assert (object
!= TARGET_OBJECT_MEMORY
);
1751 /* Start by reading up to 4K at a time. The target will throttle
1752 this number down if necessary. */
1754 buf
= xmalloc (buf_alloc
);
1758 ULONGEST xfered_len
;
1759 enum target_xfer_status status
;
1761 status
= target_read_partial (ops
, object
, annex
, &buf
[buf_pos
],
1762 buf_pos
, buf_alloc
- buf_pos
- padding
,
1765 if (status
== TARGET_XFER_EOF
)
1767 /* Read all there was. */
1774 else if (status
!= TARGET_XFER_OK
)
1776 /* An error occurred. */
1778 return TARGET_XFER_E_IO
;
1781 buf_pos
+= xfered_len
;
1783 /* If the buffer is filling up, expand it. */
1784 if (buf_alloc
< buf_pos
* 2)
1787 buf
= xrealloc (buf
, buf_alloc
);
1794 /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return
1795 the size of the transferred data. See the declaration in "target.h"
1796 function for more information about the return value. */
1799 target_read_alloc (struct target_ops
*ops
, enum target_object object
,
1800 const char *annex
, gdb_byte
**buf_p
)
1802 return target_read_alloc_1 (ops
, object
, annex
, buf_p
, 0);
1805 /* Read OBJECT/ANNEX using OPS. The result is NUL-terminated and
1806 returned as a string, allocated using xmalloc. If an error occurs
1807 or the transfer is unsupported, NULL is returned. Empty objects
1808 are returned as allocated but empty strings. A warning is issued
1809 if the result contains any embedded NUL bytes. */
1812 target_read_stralloc (struct target_ops
*ops
, enum target_object object
,
1817 LONGEST i
, transferred
;
1819 transferred
= target_read_alloc_1 (ops
, object
, annex
, &buffer
, 1);
1820 bufstr
= (char *) buffer
;
1822 if (transferred
< 0)
1825 if (transferred
== 0)
1826 return xstrdup ("");
1828 bufstr
[transferred
] = 0;
1830 /* Check for embedded NUL bytes; but allow trailing NULs. */
1831 for (i
= strlen (bufstr
); i
< transferred
; i
++)
1834 warning (_("target object %d, annex %s, "
1835 "contained unexpected null characters"),
1836 (int) object
, annex
? annex
: "(none)");
1843 /* Memory transfer methods. */
1846 get_target_memory (struct target_ops
*ops
, CORE_ADDR addr
, gdb_byte
*buf
,
1849 /* This method is used to read from an alternate, non-current
1850 target. This read must bypass the overlay support (as symbols
1851 don't match this target), and GDB's internal cache (wrong cache
1852 for this target). */
1853 if (target_read (ops
, TARGET_OBJECT_RAW_MEMORY
, NULL
, buf
, addr
, len
)
1855 memory_error (TARGET_XFER_E_IO
, addr
);
1859 get_target_memory_unsigned (struct target_ops
*ops
, CORE_ADDR addr
,
1860 int len
, enum bfd_endian byte_order
)
1862 gdb_byte buf
[sizeof (ULONGEST
)];
1864 gdb_assert (len
<= sizeof (buf
));
1865 get_target_memory (ops
, addr
, buf
, len
);
1866 return extract_unsigned_integer (buf
, len
, byte_order
);
1872 target_insert_breakpoint (struct gdbarch
*gdbarch
,
1873 struct bp_target_info
*bp_tgt
)
1875 if (!may_insert_breakpoints
)
1877 warning (_("May not insert breakpoints"));
1881 return current_target
.to_insert_breakpoint (¤t_target
,
1888 target_remove_breakpoint (struct gdbarch
*gdbarch
,
1889 struct bp_target_info
*bp_tgt
)
1891 /* This is kind of a weird case to handle, but the permission might
1892 have been changed after breakpoints were inserted - in which case
1893 we should just take the user literally and assume that any
1894 breakpoints should be left in place. */
1895 if (!may_insert_breakpoints
)
1897 warning (_("May not remove breakpoints"));
1901 return current_target
.to_remove_breakpoint (¤t_target
,
1906 target_info (char *args
, int from_tty
)
1908 struct target_ops
*t
;
1909 int has_all_mem
= 0;
1911 if (symfile_objfile
!= NULL
)
1912 printf_unfiltered (_("Symbols from \"%s\".\n"),
1913 objfile_name (symfile_objfile
));
1915 for (t
= target_stack
; t
!= NULL
; t
= t
->beneath
)
1917 if (!(*t
->to_has_memory
) (t
))
1920 if ((int) (t
->to_stratum
) <= (int) dummy_stratum
)
1923 printf_unfiltered (_("\tWhile running this, "
1924 "GDB does not access memory from...\n"));
1925 printf_unfiltered ("%s:\n", t
->to_longname
);
1926 (t
->to_files_info
) (t
);
1927 has_all_mem
= (*t
->to_has_all_memory
) (t
);
1931 /* This function is called before any new inferior is created, e.g.
1932 by running a program, attaching, or connecting to a target.
1933 It cleans up any state from previous invocations which might
1934 change between runs. This is a subset of what target_preopen
1935 resets (things which might change between targets). */
1938 target_pre_inferior (int from_tty
)
1940 /* Clear out solib state. Otherwise the solib state of the previous
1941 inferior might have survived and is entirely wrong for the new
1942 target. This has been observed on GNU/Linux using glibc 2.3. How
1954 Cannot access memory at address 0xdeadbeef
1957 /* In some OSs, the shared library list is the same/global/shared
1958 across inferiors. If code is shared between processes, so are
1959 memory regions and features. */
1960 if (!gdbarch_has_global_solist (target_gdbarch ()))
1962 no_shared_libraries (NULL
, from_tty
);
1964 invalidate_target_mem_regions ();
1966 target_clear_description ();
1969 agent_capability_invalidate ();
1972 /* Callback for iterate_over_inferiors. Gets rid of the given
1976 dispose_inferior (struct inferior
*inf
, void *args
)
1978 struct thread_info
*thread
;
1980 thread
= any_thread_of_process (inf
->pid
);
1983 switch_to_thread (thread
->ptid
);
1985 /* Core inferiors actually should be detached, not killed. */
1986 if (target_has_execution
)
1989 target_detach (NULL
, 0);
1995 /* This is to be called by the open routine before it does
1999 target_preopen (int from_tty
)
2003 if (have_inferiors ())
2006 || !have_live_inferiors ()
2007 || query (_("A program is being debugged already. Kill it? ")))
2008 iterate_over_inferiors (dispose_inferior
, NULL
);
2010 error (_("Program not killed."));
2013 /* Calling target_kill may remove the target from the stack. But if
2014 it doesn't (which seems like a win for UDI), remove it now. */
2015 /* Leave the exec target, though. The user may be switching from a
2016 live process to a core of the same program. */
2017 pop_all_targets_above (file_stratum
);
2019 target_pre_inferior (from_tty
);
2022 /* Detach a target after doing deferred register stores. */
2025 target_detach (const char *args
, int from_tty
)
2027 struct target_ops
* t
;
2029 if (gdbarch_has_global_breakpoints (target_gdbarch ()))
2030 /* Don't remove global breakpoints here. They're removed on
2031 disconnection from the target. */
2034 /* If we're in breakpoints-always-inserted mode, have to remove
2035 them before detaching. */
2036 remove_breakpoints_pid (ptid_get_pid (inferior_ptid
));
2038 prepare_for_detach ();
2040 current_target
.to_detach (¤t_target
, args
, from_tty
);
2044 target_disconnect (const char *args
, int from_tty
)
2046 /* If we're in breakpoints-always-inserted mode or if breakpoints
2047 are global across processes, we have to remove them before
2049 remove_breakpoints ();
2051 current_target
.to_disconnect (¤t_target
, args
, from_tty
);
2055 target_wait (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
2057 return (current_target
.to_wait
) (¤t_target
, ptid
, status
, options
);
2061 target_pid_to_str (ptid_t ptid
)
2063 return (*current_target
.to_pid_to_str
) (¤t_target
, ptid
);
2067 target_thread_name (struct thread_info
*info
)
2069 return current_target
.to_thread_name (¤t_target
, info
);
2073 target_resume (ptid_t ptid
, int step
, enum gdb_signal signal
)
2075 struct target_ops
*t
;
2077 target_dcache_invalidate ();
2079 current_target
.to_resume (¤t_target
, ptid
, step
, signal
);
2081 registers_changed_ptid (ptid
);
2082 /* We only set the internal executing state here. The user/frontend
2083 running state is set at a higher level. */
2084 set_executing (ptid
, 1);
2085 clear_inline_frame_state (ptid
);
2089 target_pass_signals (int numsigs
, unsigned char *pass_signals
)
2091 (*current_target
.to_pass_signals
) (¤t_target
, numsigs
, pass_signals
);
2095 target_program_signals (int numsigs
, unsigned char *program_signals
)
2097 (*current_target
.to_program_signals
) (¤t_target
,
2098 numsigs
, program_signals
);
2102 default_follow_fork (struct target_ops
*self
, int follow_child
,
2105 /* Some target returned a fork event, but did not know how to follow it. */
2106 internal_error (__FILE__
, __LINE__
,
2107 _("could not find a target to follow fork"));
2110 /* Look through the list of possible targets for a target that can
2114 target_follow_fork (int follow_child
, int detach_fork
)
2116 return current_target
.to_follow_fork (¤t_target
,
2117 follow_child
, detach_fork
);
2121 default_mourn_inferior (struct target_ops
*self
)
2123 internal_error (__FILE__
, __LINE__
,
2124 _("could not find a target to follow mourn inferior"));
2128 target_mourn_inferior (void)
2130 current_target
.to_mourn_inferior (¤t_target
);
2132 /* We no longer need to keep handles on any of the object files.
2133 Make sure to release them to avoid unnecessarily locking any
2134 of them while we're not actually debugging. */
2135 bfd_cache_close_all ();
2138 /* Look for a target which can describe architectural features, starting
2139 from TARGET. If we find one, return its description. */
2141 const struct target_desc
*
2142 target_read_description (struct target_ops
*target
)
2144 return target
->to_read_description (target
);
2147 /* This implements a basic search of memory, reading target memory and
2148 performing the search here (as opposed to performing the search in on the
2149 target side with, for example, gdbserver). */
2152 simple_search_memory (struct target_ops
*ops
,
2153 CORE_ADDR start_addr
, ULONGEST search_space_len
,
2154 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2155 CORE_ADDR
*found_addrp
)
2157 /* NOTE: also defined in find.c testcase. */
2158 #define SEARCH_CHUNK_SIZE 16000
2159 const unsigned chunk_size
= SEARCH_CHUNK_SIZE
;
2160 /* Buffer to hold memory contents for searching. */
2161 gdb_byte
*search_buf
;
2162 unsigned search_buf_size
;
2163 struct cleanup
*old_cleanups
;
2165 search_buf_size
= chunk_size
+ pattern_len
- 1;
2167 /* No point in trying to allocate a buffer larger than the search space. */
2168 if (search_space_len
< search_buf_size
)
2169 search_buf_size
= search_space_len
;
2171 search_buf
= malloc (search_buf_size
);
2172 if (search_buf
== NULL
)
2173 error (_("Unable to allocate memory to perform the search."));
2174 old_cleanups
= make_cleanup (free_current_contents
, &search_buf
);
2176 /* Prime the search buffer. */
2178 if (target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2179 search_buf
, start_addr
, search_buf_size
) != search_buf_size
)
2181 warning (_("Unable to access %s bytes of target "
2182 "memory at %s, halting search."),
2183 pulongest (search_buf_size
), hex_string (start_addr
));
2184 do_cleanups (old_cleanups
);
2188 /* Perform the search.
2190 The loop is kept simple by allocating [N + pattern-length - 1] bytes.
2191 When we've scanned N bytes we copy the trailing bytes to the start and
2192 read in another N bytes. */
2194 while (search_space_len
>= pattern_len
)
2196 gdb_byte
*found_ptr
;
2197 unsigned nr_search_bytes
= min (search_space_len
, search_buf_size
);
2199 found_ptr
= memmem (search_buf
, nr_search_bytes
,
2200 pattern
, pattern_len
);
2202 if (found_ptr
!= NULL
)
2204 CORE_ADDR found_addr
= start_addr
+ (found_ptr
- search_buf
);
2206 *found_addrp
= found_addr
;
2207 do_cleanups (old_cleanups
);
2211 /* Not found in this chunk, skip to next chunk. */
2213 /* Don't let search_space_len wrap here, it's unsigned. */
2214 if (search_space_len
>= chunk_size
)
2215 search_space_len
-= chunk_size
;
2217 search_space_len
= 0;
2219 if (search_space_len
>= pattern_len
)
2221 unsigned keep_len
= search_buf_size
- chunk_size
;
2222 CORE_ADDR read_addr
= start_addr
+ chunk_size
+ keep_len
;
2225 /* Copy the trailing part of the previous iteration to the front
2226 of the buffer for the next iteration. */
2227 gdb_assert (keep_len
== pattern_len
- 1);
2228 memcpy (search_buf
, search_buf
+ chunk_size
, keep_len
);
2230 nr_to_read
= min (search_space_len
- keep_len
, chunk_size
);
2232 if (target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2233 search_buf
+ keep_len
, read_addr
,
2234 nr_to_read
) != nr_to_read
)
2236 warning (_("Unable to access %s bytes of target "
2237 "memory at %s, halting search."),
2238 plongest (nr_to_read
),
2239 hex_string (read_addr
));
2240 do_cleanups (old_cleanups
);
2244 start_addr
+= chunk_size
;
2250 do_cleanups (old_cleanups
);
2254 /* Default implementation of memory-searching. */
2257 default_search_memory (struct target_ops
*self
,
2258 CORE_ADDR start_addr
, ULONGEST search_space_len
,
2259 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2260 CORE_ADDR
*found_addrp
)
2262 /* Start over from the top of the target stack. */
2263 return simple_search_memory (current_target
.beneath
,
2264 start_addr
, search_space_len
,
2265 pattern
, pattern_len
, found_addrp
);
2268 /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the
2269 sequence of bytes in PATTERN with length PATTERN_LEN.
2271 The result is 1 if found, 0 if not found, and -1 if there was an error
2272 requiring halting of the search (e.g. memory read error).
2273 If the pattern is found the address is recorded in FOUND_ADDRP. */
2276 target_search_memory (CORE_ADDR start_addr
, ULONGEST search_space_len
,
2277 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2278 CORE_ADDR
*found_addrp
)
2280 return current_target
.to_search_memory (¤t_target
, start_addr
,
2282 pattern
, pattern_len
, found_addrp
);
2285 /* Look through the currently pushed targets. If none of them will
2286 be able to restart the currently running process, issue an error
2290 target_require_runnable (void)
2292 struct target_ops
*t
;
2294 for (t
= target_stack
; t
!= NULL
; t
= t
->beneath
)
2296 /* If this target knows how to create a new program, then
2297 assume we will still be able to after killing the current
2298 one. Either killing and mourning will not pop T, or else
2299 find_default_run_target will find it again. */
2300 if (t
->to_create_inferior
!= NULL
)
2303 /* Do not worry about targets at certain strata that can not
2304 create inferiors. Assume they will be pushed again if
2305 necessary, and continue to the process_stratum. */
2306 if (t
->to_stratum
== thread_stratum
2307 || t
->to_stratum
== record_stratum
2308 || t
->to_stratum
== arch_stratum
)
2311 error (_("The \"%s\" target does not support \"run\". "
2312 "Try \"help target\" or \"continue\"."),
2316 /* This function is only called if the target is running. In that
2317 case there should have been a process_stratum target and it
2318 should either know how to create inferiors, or not... */
2319 internal_error (__FILE__
, __LINE__
, _("No targets found"));
2322 /* Whether GDB is allowed to fall back to the default run target for
2323 "run", "attach", etc. when no target is connected yet. */
2324 static int auto_connect_native_target
= 1;
2327 show_auto_connect_native_target (struct ui_file
*file
, int from_tty
,
2328 struct cmd_list_element
*c
, const char *value
)
2330 fprintf_filtered (file
,
2331 _("Whether GDB may automatically connect to the "
2332 "native target is %s.\n"),
2336 /* Look through the list of possible targets for a target that can
2337 execute a run or attach command without any other data. This is
2338 used to locate the default process stratum.
2340 If DO_MESG is not NULL, the result is always valid (error() is
2341 called for errors); else, return NULL on error. */
2343 static struct target_ops
*
2344 find_default_run_target (char *do_mesg
)
2346 struct target_ops
*runable
= NULL
;
2348 if (auto_connect_native_target
)
2350 struct target_ops
*t
;
2354 for (i
= 0; VEC_iterate (target_ops_p
, target_structs
, i
, t
); ++i
)
2356 if (t
->to_can_run
!= delegate_can_run
&& target_can_run (t
))
2367 if (runable
== NULL
)
2370 error (_("Don't know how to %s. Try \"help target\"."), do_mesg
);
2381 find_attach_target (void)
2383 struct target_ops
*t
;
2385 /* If a target on the current stack can attach, use it. */
2386 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2388 if (t
->to_attach
!= NULL
)
2392 /* Otherwise, use the default run target for attaching. */
2394 t
= find_default_run_target ("attach");
2402 find_run_target (void)
2404 struct target_ops
*t
;
2406 /* If a target on the current stack can attach, use it. */
2407 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2409 if (t
->to_create_inferior
!= NULL
)
2413 /* Otherwise, use the default run target. */
2415 t
= find_default_run_target ("run");
2420 /* Implement the "info proc" command. */
2423 target_info_proc (const char *args
, enum info_proc_what what
)
2425 struct target_ops
*t
;
2427 /* If we're already connected to something that can get us OS
2428 related data, use it. Otherwise, try using the native
2430 if (current_target
.to_stratum
>= process_stratum
)
2431 t
= current_target
.beneath
;
2433 t
= find_default_run_target (NULL
);
2435 for (; t
!= NULL
; t
= t
->beneath
)
2437 if (t
->to_info_proc
!= NULL
)
2439 t
->to_info_proc (t
, args
, what
);
2442 fprintf_unfiltered (gdb_stdlog
,
2443 "target_info_proc (\"%s\", %d)\n", args
, what
);
2453 find_default_supports_disable_randomization (struct target_ops
*self
)
2455 struct target_ops
*t
;
2457 t
= find_default_run_target (NULL
);
2458 if (t
&& t
->to_supports_disable_randomization
)
2459 return (t
->to_supports_disable_randomization
) (t
);
2464 target_supports_disable_randomization (void)
2466 struct target_ops
*t
;
2468 for (t
= ¤t_target
; t
!= NULL
; t
= t
->beneath
)
2469 if (t
->to_supports_disable_randomization
)
2470 return t
->to_supports_disable_randomization (t
);
2476 target_get_osdata (const char *type
)
2478 struct target_ops
*t
;
2480 /* If we're already connected to something that can get us OS
2481 related data, use it. Otherwise, try using the native
2483 if (current_target
.to_stratum
>= process_stratum
)
2484 t
= current_target
.beneath
;
2486 t
= find_default_run_target ("get OS data");
2491 return target_read_stralloc (t
, TARGET_OBJECT_OSDATA
, type
);
2494 static struct address_space
*
2495 default_thread_address_space (struct target_ops
*self
, ptid_t ptid
)
2497 struct inferior
*inf
;
2499 /* Fall-back to the "main" address space of the inferior. */
2500 inf
= find_inferior_pid (ptid_get_pid (ptid
));
2502 if (inf
== NULL
|| inf
->aspace
== NULL
)
2503 internal_error (__FILE__
, __LINE__
,
2504 _("Can't determine the current "
2505 "address space of thread %s\n"),
2506 target_pid_to_str (ptid
));
2511 /* Determine the current address space of thread PTID. */
2513 struct address_space
*
2514 target_thread_address_space (ptid_t ptid
)
2516 struct address_space
*aspace
;
2518 aspace
= current_target
.to_thread_address_space (¤t_target
, ptid
);
2519 gdb_assert (aspace
!= NULL
);
2525 /* Target file operations. */
2527 static struct target_ops
*
2528 default_fileio_target (void)
2530 /* If we're already connected to something that can perform
2531 file I/O, use it. Otherwise, try using the native target. */
2532 if (current_target
.to_stratum
>= process_stratum
)
2533 return current_target
.beneath
;
2535 return find_default_run_target ("file I/O");
2538 /* Open FILENAME on the target, using FLAGS and MODE. Return a
2539 target file descriptor, or -1 if an error occurs (and set
2542 target_fileio_open (const char *filename
, int flags
, int mode
,
2545 struct target_ops
*t
;
2547 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
2549 if (t
->to_fileio_open
!= NULL
)
2551 int fd
= t
->to_fileio_open (t
, filename
, flags
, mode
, target_errno
);
2554 fprintf_unfiltered (gdb_stdlog
,
2555 "target_fileio_open (%s,0x%x,0%o) = %d (%d)\n",
2556 filename
, flags
, mode
,
2557 fd
, fd
!= -1 ? 0 : *target_errno
);
2562 *target_errno
= FILEIO_ENOSYS
;
2566 /* Write up to LEN bytes from WRITE_BUF to FD on the target.
2567 Return the number of bytes written, or -1 if an error occurs
2568 (and set *TARGET_ERRNO). */
2570 target_fileio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
2571 ULONGEST offset
, int *target_errno
)
2573 struct target_ops
*t
;
2575 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
2577 if (t
->to_fileio_pwrite
!= NULL
)
2579 int ret
= t
->to_fileio_pwrite (t
, fd
, write_buf
, len
, offset
,
2583 fprintf_unfiltered (gdb_stdlog
,
2584 "target_fileio_pwrite (%d,...,%d,%s) "
2586 fd
, len
, pulongest (offset
),
2587 ret
, ret
!= -1 ? 0 : *target_errno
);
2592 *target_errno
= FILEIO_ENOSYS
;
2596 /* Read up to LEN bytes FD on the target into READ_BUF.
2597 Return the number of bytes read, or -1 if an error occurs
2598 (and set *TARGET_ERRNO). */
2600 target_fileio_pread (int fd
, gdb_byte
*read_buf
, int len
,
2601 ULONGEST offset
, int *target_errno
)
2603 struct target_ops
*t
;
2605 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
2607 if (t
->to_fileio_pread
!= NULL
)
2609 int ret
= t
->to_fileio_pread (t
, fd
, read_buf
, len
, offset
,
2613 fprintf_unfiltered (gdb_stdlog
,
2614 "target_fileio_pread (%d,...,%d,%s) "
2616 fd
, len
, pulongest (offset
),
2617 ret
, ret
!= -1 ? 0 : *target_errno
);
2622 *target_errno
= FILEIO_ENOSYS
;
2626 /* Close FD on the target. Return 0, or -1 if an error occurs
2627 (and set *TARGET_ERRNO). */
2629 target_fileio_close (int fd
, int *target_errno
)
2631 struct target_ops
*t
;
2633 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
2635 if (t
->to_fileio_close
!= NULL
)
2637 int ret
= t
->to_fileio_close (t
, fd
, target_errno
);
2640 fprintf_unfiltered (gdb_stdlog
,
2641 "target_fileio_close (%d) = %d (%d)\n",
2642 fd
, ret
, ret
!= -1 ? 0 : *target_errno
);
2647 *target_errno
= FILEIO_ENOSYS
;
2651 /* Unlink FILENAME on the target. Return 0, or -1 if an error
2652 occurs (and set *TARGET_ERRNO). */
2654 target_fileio_unlink (const char *filename
, int *target_errno
)
2656 struct target_ops
*t
;
2658 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
2660 if (t
->to_fileio_unlink
!= NULL
)
2662 int ret
= t
->to_fileio_unlink (t
, filename
, target_errno
);
2665 fprintf_unfiltered (gdb_stdlog
,
2666 "target_fileio_unlink (%s) = %d (%d)\n",
2667 filename
, ret
, ret
!= -1 ? 0 : *target_errno
);
2672 *target_errno
= FILEIO_ENOSYS
;
2676 /* Read value of symbolic link FILENAME on the target. Return a
2677 null-terminated string allocated via xmalloc, or NULL if an error
2678 occurs (and set *TARGET_ERRNO). */
2680 target_fileio_readlink (const char *filename
, int *target_errno
)
2682 struct target_ops
*t
;
2684 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
2686 if (t
->to_fileio_readlink
!= NULL
)
2688 char *ret
= t
->to_fileio_readlink (t
, filename
, target_errno
);
2691 fprintf_unfiltered (gdb_stdlog
,
2692 "target_fileio_readlink (%s) = %s (%d)\n",
2693 filename
, ret
? ret
: "(nil)",
2694 ret
? 0 : *target_errno
);
2699 *target_errno
= FILEIO_ENOSYS
;
2704 target_fileio_close_cleanup (void *opaque
)
2706 int fd
= *(int *) opaque
;
2709 target_fileio_close (fd
, &target_errno
);
2712 /* Read target file FILENAME. Store the result in *BUF_P and
2713 return the size of the transferred data. PADDING additional bytes are
2714 available in *BUF_P. This is a helper function for
2715 target_fileio_read_alloc; see the declaration of that function for more
2719 target_fileio_read_alloc_1 (const char *filename
,
2720 gdb_byte
**buf_p
, int padding
)
2722 struct cleanup
*close_cleanup
;
2723 size_t buf_alloc
, buf_pos
;
2729 fd
= target_fileio_open (filename
, FILEIO_O_RDONLY
, 0700, &target_errno
);
2733 close_cleanup
= make_cleanup (target_fileio_close_cleanup
, &fd
);
2735 /* Start by reading up to 4K at a time. The target will throttle
2736 this number down if necessary. */
2738 buf
= xmalloc (buf_alloc
);
2742 n
= target_fileio_pread (fd
, &buf
[buf_pos
],
2743 buf_alloc
- buf_pos
- padding
, buf_pos
,
2747 /* An error occurred. */
2748 do_cleanups (close_cleanup
);
2754 /* Read all there was. */
2755 do_cleanups (close_cleanup
);
2765 /* If the buffer is filling up, expand it. */
2766 if (buf_alloc
< buf_pos
* 2)
2769 buf
= xrealloc (buf
, buf_alloc
);
2776 /* Read target file FILENAME. Store the result in *BUF_P and return
2777 the size of the transferred data. See the declaration in "target.h"
2778 function for more information about the return value. */
2781 target_fileio_read_alloc (const char *filename
, gdb_byte
**buf_p
)
2783 return target_fileio_read_alloc_1 (filename
, buf_p
, 0);
2786 /* Read target file FILENAME. The result is NUL-terminated and
2787 returned as a string, allocated using xmalloc. If an error occurs
2788 or the transfer is unsupported, NULL is returned. Empty objects
2789 are returned as allocated but empty strings. A warning is issued
2790 if the result contains any embedded NUL bytes. */
2793 target_fileio_read_stralloc (const char *filename
)
2797 LONGEST i
, transferred
;
2799 transferred
= target_fileio_read_alloc_1 (filename
, &buffer
, 1);
2800 bufstr
= (char *) buffer
;
2802 if (transferred
< 0)
2805 if (transferred
== 0)
2806 return xstrdup ("");
2808 bufstr
[transferred
] = 0;
2810 /* Check for embedded NUL bytes; but allow trailing NULs. */
2811 for (i
= strlen (bufstr
); i
< transferred
; i
++)
2814 warning (_("target file %s "
2815 "contained unexpected null characters"),
2825 default_region_ok_for_hw_watchpoint (struct target_ops
*self
,
2826 CORE_ADDR addr
, int len
)
2828 return (len
<= gdbarch_ptr_bit (target_gdbarch ()) / TARGET_CHAR_BIT
);
2832 default_watchpoint_addr_within_range (struct target_ops
*target
,
2834 CORE_ADDR start
, int length
)
2836 return addr
>= start
&& addr
< start
+ length
;
2839 static struct gdbarch
*
2840 default_thread_architecture (struct target_ops
*ops
, ptid_t ptid
)
2842 return target_gdbarch ();
2846 return_zero (struct target_ops
*ignore
)
2852 return_zero_has_execution (struct target_ops
*ignore
, ptid_t ignore2
)
2858 * Find the next target down the stack from the specified target.
2862 find_target_beneath (struct target_ops
*t
)
2870 find_target_at (enum strata stratum
)
2872 struct target_ops
*t
;
2874 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2875 if (t
->to_stratum
== stratum
)
2882 /* The inferior process has died. Long live the inferior! */
2885 generic_mourn_inferior (void)
2889 ptid
= inferior_ptid
;
2890 inferior_ptid
= null_ptid
;
2892 /* Mark breakpoints uninserted in case something tries to delete a
2893 breakpoint while we delete the inferior's threads (which would
2894 fail, since the inferior is long gone). */
2895 mark_breakpoints_out ();
2897 if (!ptid_equal (ptid
, null_ptid
))
2899 int pid
= ptid_get_pid (ptid
);
2900 exit_inferior (pid
);
2903 /* Note this wipes step-resume breakpoints, so needs to be done
2904 after exit_inferior, which ends up referencing the step-resume
2905 breakpoints through clear_thread_inferior_resources. */
2906 breakpoint_init_inferior (inf_exited
);
2908 registers_changed ();
2910 reopen_exec_file ();
2911 reinit_frame_cache ();
2913 if (deprecated_detach_hook
)
2914 deprecated_detach_hook ();
2917 /* Convert a normal process ID to a string. Returns the string in a
2921 normal_pid_to_str (ptid_t ptid
)
2923 static char buf
[32];
2925 xsnprintf (buf
, sizeof buf
, "process %d", ptid_get_pid (ptid
));
2930 default_pid_to_str (struct target_ops
*ops
, ptid_t ptid
)
2932 return normal_pid_to_str (ptid
);
2935 /* Error-catcher for target_find_memory_regions. */
2937 dummy_find_memory_regions (struct target_ops
*self
,
2938 find_memory_region_ftype ignore1
, void *ignore2
)
2940 error (_("Command not implemented for this target."));
2944 /* Error-catcher for target_make_corefile_notes. */
2946 dummy_make_corefile_notes (struct target_ops
*self
,
2947 bfd
*ignore1
, int *ignore2
)
2949 error (_("Command not implemented for this target."));
2953 /* Set up the handful of non-empty slots needed by the dummy target
2957 init_dummy_target (void)
2959 dummy_target
.to_shortname
= "None";
2960 dummy_target
.to_longname
= "None";
2961 dummy_target
.to_doc
= "";
2962 dummy_target
.to_supports_disable_randomization
2963 = find_default_supports_disable_randomization
;
2964 dummy_target
.to_stratum
= dummy_stratum
;
2965 dummy_target
.to_has_all_memory
= return_zero
;
2966 dummy_target
.to_has_memory
= return_zero
;
2967 dummy_target
.to_has_stack
= return_zero
;
2968 dummy_target
.to_has_registers
= return_zero
;
2969 dummy_target
.to_has_execution
= return_zero_has_execution
;
2970 dummy_target
.to_magic
= OPS_MAGIC
;
2972 install_dummy_methods (&dummy_target
);
2977 target_close (struct target_ops
*targ
)
2979 gdb_assert (!target_is_pushed (targ
));
2981 if (targ
->to_xclose
!= NULL
)
2982 targ
->to_xclose (targ
);
2983 else if (targ
->to_close
!= NULL
)
2984 targ
->to_close (targ
);
2987 fprintf_unfiltered (gdb_stdlog
, "target_close ()\n");
2991 target_thread_alive (ptid_t ptid
)
2993 return current_target
.to_thread_alive (¤t_target
, ptid
);
2997 target_find_new_threads (void)
2999 current_target
.to_find_new_threads (¤t_target
);
3003 target_stop (ptid_t ptid
)
3007 warning (_("May not interrupt or stop the target, ignoring attempt"));
3011 (*current_target
.to_stop
) (¤t_target
, ptid
);
3014 /* Concatenate ELEM to LIST, a comma separate list, and return the
3015 result. The LIST incoming argument is released. */
3018 str_comma_list_concat_elem (char *list
, const char *elem
)
3021 return xstrdup (elem
);
3023 return reconcat (list
, list
, ", ", elem
, (char *) NULL
);
3026 /* Helper for target_options_to_string. If OPT is present in
3027 TARGET_OPTIONS, append the OPT_STR (string version of OPT) in RET.
3028 Returns the new resulting string. OPT is removed from
3032 do_option (int *target_options
, char *ret
,
3033 int opt
, char *opt_str
)
3035 if ((*target_options
& opt
) != 0)
3037 ret
= str_comma_list_concat_elem (ret
, opt_str
);
3038 *target_options
&= ~opt
;
3045 target_options_to_string (int target_options
)
3049 #define DO_TARG_OPTION(OPT) \
3050 ret = do_option (&target_options, ret, OPT, #OPT)
3052 DO_TARG_OPTION (TARGET_WNOHANG
);
3054 if (target_options
!= 0)
3055 ret
= str_comma_list_concat_elem (ret
, "unknown???");
3063 debug_print_register (const char * func
,
3064 struct regcache
*regcache
, int regno
)
3066 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
3068 fprintf_unfiltered (gdb_stdlog
, "%s ", func
);
3069 if (regno
>= 0 && regno
< gdbarch_num_regs (gdbarch
)
3070 && gdbarch_register_name (gdbarch
, regno
) != NULL
3071 && gdbarch_register_name (gdbarch
, regno
)[0] != '\0')
3072 fprintf_unfiltered (gdb_stdlog
, "(%s)",
3073 gdbarch_register_name (gdbarch
, regno
));
3075 fprintf_unfiltered (gdb_stdlog
, "(%d)", regno
);
3076 if (regno
>= 0 && regno
< gdbarch_num_regs (gdbarch
))
3078 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
3079 int i
, size
= register_size (gdbarch
, regno
);
3080 gdb_byte buf
[MAX_REGISTER_SIZE
];
3082 regcache_raw_collect (regcache
, regno
, buf
);
3083 fprintf_unfiltered (gdb_stdlog
, " = ");
3084 for (i
= 0; i
< size
; i
++)
3086 fprintf_unfiltered (gdb_stdlog
, "%02x", buf
[i
]);
3088 if (size
<= sizeof (LONGEST
))
3090 ULONGEST val
= extract_unsigned_integer (buf
, size
, byte_order
);
3092 fprintf_unfiltered (gdb_stdlog
, " %s %s",
3093 core_addr_to_string_nz (val
), plongest (val
));
3096 fprintf_unfiltered (gdb_stdlog
, "\n");
3100 target_fetch_registers (struct regcache
*regcache
, int regno
)
3102 current_target
.to_fetch_registers (¤t_target
, regcache
, regno
);
3104 debug_print_register ("target_fetch_registers", regcache
, regno
);
3108 target_store_registers (struct regcache
*regcache
, int regno
)
3110 struct target_ops
*t
;
3112 if (!may_write_registers
)
3113 error (_("Writing to registers is not allowed (regno %d)"), regno
);
3115 current_target
.to_store_registers (¤t_target
, regcache
, regno
);
3118 debug_print_register ("target_store_registers", regcache
, regno
);
3123 target_core_of_thread (ptid_t ptid
)
3125 return current_target
.to_core_of_thread (¤t_target
, ptid
);
3129 simple_verify_memory (struct target_ops
*ops
,
3130 const gdb_byte
*data
, CORE_ADDR lma
, ULONGEST size
)
3132 LONGEST total_xfered
= 0;
3134 while (total_xfered
< size
)
3136 ULONGEST xfered_len
;
3137 enum target_xfer_status status
;
3139 ULONGEST howmuch
= min (sizeof (buf
), size
- total_xfered
);
3141 status
= target_xfer_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
3142 buf
, NULL
, lma
+ total_xfered
, howmuch
,
3144 if (status
== TARGET_XFER_OK
3145 && memcmp (data
+ total_xfered
, buf
, xfered_len
) == 0)
3147 total_xfered
+= xfered_len
;
3156 /* Default implementation of memory verification. */
3159 default_verify_memory (struct target_ops
*self
,
3160 const gdb_byte
*data
, CORE_ADDR memaddr
, ULONGEST size
)
3162 /* Start over from the top of the target stack. */
3163 return simple_verify_memory (current_target
.beneath
,
3164 data
, memaddr
, size
);
3168 target_verify_memory (const gdb_byte
*data
, CORE_ADDR memaddr
, ULONGEST size
)
3170 return current_target
.to_verify_memory (¤t_target
,
3171 data
, memaddr
, size
);
3174 /* The documentation for this function is in its prototype declaration in
3178 target_insert_mask_watchpoint (CORE_ADDR addr
, CORE_ADDR mask
, int rw
)
3180 return current_target
.to_insert_mask_watchpoint (¤t_target
,
3184 /* The documentation for this function is in its prototype declaration in
3188 target_remove_mask_watchpoint (CORE_ADDR addr
, CORE_ADDR mask
, int rw
)
3190 return current_target
.to_remove_mask_watchpoint (¤t_target
,
3194 /* The documentation for this function is in its prototype declaration
3198 target_masked_watch_num_registers (CORE_ADDR addr
, CORE_ADDR mask
)
3200 return current_target
.to_masked_watch_num_registers (¤t_target
,
3204 /* The documentation for this function is in its prototype declaration
3208 target_ranged_break_num_registers (void)
3210 return current_target
.to_ranged_break_num_registers (¤t_target
);
3215 struct btrace_target_info
*
3216 target_enable_btrace (ptid_t ptid
)
3218 return current_target
.to_enable_btrace (¤t_target
, ptid
);
3224 target_disable_btrace (struct btrace_target_info
*btinfo
)
3226 current_target
.to_disable_btrace (¤t_target
, btinfo
);
3232 target_teardown_btrace (struct btrace_target_info
*btinfo
)
3234 current_target
.to_teardown_btrace (¤t_target
, btinfo
);
3240 target_read_btrace (VEC (btrace_block_s
) **btrace
,
3241 struct btrace_target_info
*btinfo
,
3242 enum btrace_read_type type
)
3244 return current_target
.to_read_btrace (¤t_target
, btrace
, btinfo
, type
);
3250 target_stop_recording (void)
3252 current_target
.to_stop_recording (¤t_target
);
3258 target_save_record (const char *filename
)
3260 current_target
.to_save_record (¤t_target
, filename
);
3266 target_supports_delete_record (void)
3268 struct target_ops
*t
;
3270 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3271 if (t
->to_delete_record
!= delegate_delete_record
3272 && t
->to_delete_record
!= tdefault_delete_record
)
3281 target_delete_record (void)
3283 current_target
.to_delete_record (¤t_target
);
3289 target_record_is_replaying (void)
3291 return current_target
.to_record_is_replaying (¤t_target
);
3297 target_goto_record_begin (void)
3299 current_target
.to_goto_record_begin (¤t_target
);
3305 target_goto_record_end (void)
3307 current_target
.to_goto_record_end (¤t_target
);
3313 target_goto_record (ULONGEST insn
)
3315 current_target
.to_goto_record (¤t_target
, insn
);
3321 target_insn_history (int size
, int flags
)
3323 current_target
.to_insn_history (¤t_target
, size
, flags
);
3329 target_insn_history_from (ULONGEST from
, int size
, int flags
)
3331 current_target
.to_insn_history_from (¤t_target
, from
, size
, flags
);
3337 target_insn_history_range (ULONGEST begin
, ULONGEST end
, int flags
)
3339 current_target
.to_insn_history_range (¤t_target
, begin
, end
, flags
);
3345 target_call_history (int size
, int flags
)
3347 current_target
.to_call_history (¤t_target
, size
, flags
);
3353 target_call_history_from (ULONGEST begin
, int size
, int flags
)
3355 current_target
.to_call_history_from (¤t_target
, begin
, size
, flags
);
3361 target_call_history_range (ULONGEST begin
, ULONGEST end
, int flags
)
3363 current_target
.to_call_history_range (¤t_target
, begin
, end
, flags
);
3368 const struct frame_unwind
*
3369 target_get_unwinder (void)
3371 return current_target
.to_get_unwinder (¤t_target
);
3376 const struct frame_unwind
*
3377 target_get_tailcall_unwinder (void)
3379 return current_target
.to_get_tailcall_unwinder (¤t_target
);
3382 /* Default implementation of to_decr_pc_after_break. */
3385 default_target_decr_pc_after_break (struct target_ops
*ops
,
3386 struct gdbarch
*gdbarch
)
3388 return gdbarch_decr_pc_after_break (gdbarch
);
3394 target_decr_pc_after_break (struct gdbarch
*gdbarch
)
3396 return current_target
.to_decr_pc_after_break (¤t_target
, gdbarch
);
3402 target_prepare_to_generate_core (void)
3404 current_target
.to_prepare_to_generate_core (¤t_target
);
3410 target_done_generating_core (void)
3412 current_target
.to_done_generating_core (¤t_target
);
3416 setup_target_debug (void)
3418 memcpy (&debug_target
, ¤t_target
, sizeof debug_target
);
3420 init_debug_target (¤t_target
);
3424 static char targ_desc
[] =
3425 "Names of targets and files being debugged.\nShows the entire \
3426 stack of targets currently in use (including the exec-file,\n\
3427 core-file, and process, if any), as well as the symbol file name.";
3430 default_rcmd (struct target_ops
*self
, const char *command
,
3431 struct ui_file
*output
)
3433 error (_("\"monitor\" command not supported by this target."));
3437 do_monitor_command (char *cmd
,
3440 target_rcmd (cmd
, gdb_stdtarg
);
3443 /* Print the name of each layers of our target stack. */
3446 maintenance_print_target_stack (char *cmd
, int from_tty
)
3448 struct target_ops
*t
;
3450 printf_filtered (_("The current target stack is:\n"));
3452 for (t
= target_stack
; t
!= NULL
; t
= t
->beneath
)
3454 printf_filtered (" - %s (%s)\n", t
->to_shortname
, t
->to_longname
);
3458 /* Controls if targets can report that they can/are async. This is
3459 just for maintainers to use when debugging gdb. */
3460 int target_async_permitted
= 1;
3462 /* The set command writes to this variable. If the inferior is
3463 executing, target_async_permitted is *not* updated. */
3464 static int target_async_permitted_1
= 1;
3467 maint_set_target_async_command (char *args
, int from_tty
,
3468 struct cmd_list_element
*c
)
3470 if (have_live_inferiors ())
3472 target_async_permitted_1
= target_async_permitted
;
3473 error (_("Cannot change this setting while the inferior is running."));
3476 target_async_permitted
= target_async_permitted_1
;
3480 maint_show_target_async_command (struct ui_file
*file
, int from_tty
,
3481 struct cmd_list_element
*c
,
3484 fprintf_filtered (file
,
3485 _("Controlling the inferior in "
3486 "asynchronous mode is %s.\n"), value
);
3489 /* Temporary copies of permission settings. */
3491 static int may_write_registers_1
= 1;
3492 static int may_write_memory_1
= 1;
3493 static int may_insert_breakpoints_1
= 1;
3494 static int may_insert_tracepoints_1
= 1;
3495 static int may_insert_fast_tracepoints_1
= 1;
3496 static int may_stop_1
= 1;
3498 /* Make the user-set values match the real values again. */
3501 update_target_permissions (void)
3503 may_write_registers_1
= may_write_registers
;
3504 may_write_memory_1
= may_write_memory
;
3505 may_insert_breakpoints_1
= may_insert_breakpoints
;
3506 may_insert_tracepoints_1
= may_insert_tracepoints
;
3507 may_insert_fast_tracepoints_1
= may_insert_fast_tracepoints
;
3508 may_stop_1
= may_stop
;
3511 /* The one function handles (most of) the permission flags in the same
3515 set_target_permissions (char *args
, int from_tty
,
3516 struct cmd_list_element
*c
)
3518 if (target_has_execution
)
3520 update_target_permissions ();
3521 error (_("Cannot change this setting while the inferior is running."));
3524 /* Make the real values match the user-changed values. */
3525 may_write_registers
= may_write_registers_1
;
3526 may_insert_breakpoints
= may_insert_breakpoints_1
;
3527 may_insert_tracepoints
= may_insert_tracepoints_1
;
3528 may_insert_fast_tracepoints
= may_insert_fast_tracepoints_1
;
3529 may_stop
= may_stop_1
;
3530 update_observer_mode ();
3533 /* Set memory write permission independently of observer mode. */
3536 set_write_memory_permission (char *args
, int from_tty
,
3537 struct cmd_list_element
*c
)
3539 /* Make the real values match the user-changed values. */
3540 may_write_memory
= may_write_memory_1
;
3541 update_observer_mode ();
3546 initialize_targets (void)
3548 init_dummy_target ();
3549 push_target (&dummy_target
);
3551 add_info ("target", target_info
, targ_desc
);
3552 add_info ("files", target_info
, targ_desc
);
3554 add_setshow_zuinteger_cmd ("target", class_maintenance
, &targetdebug
, _("\
3555 Set target debugging."), _("\
3556 Show target debugging."), _("\
3557 When non-zero, target debugging is enabled. Higher numbers are more\n\
3561 &setdebuglist
, &showdebuglist
);
3563 add_setshow_boolean_cmd ("trust-readonly-sections", class_support
,
3564 &trust_readonly
, _("\
3565 Set mode for reading from readonly sections."), _("\
3566 Show mode for reading from readonly sections."), _("\
3567 When this mode is on, memory reads from readonly sections (such as .text)\n\
3568 will be read from the object file instead of from the target. This will\n\
3569 result in significant performance improvement for remote targets."),
3571 show_trust_readonly
,
3572 &setlist
, &showlist
);
3574 add_com ("monitor", class_obscure
, do_monitor_command
,
3575 _("Send a command to the remote monitor (remote targets only)."));
3577 add_cmd ("target-stack", class_maintenance
, maintenance_print_target_stack
,
3578 _("Print the name of each layer of the internal target stack."),
3579 &maintenanceprintlist
);
3581 add_setshow_boolean_cmd ("target-async", no_class
,
3582 &target_async_permitted_1
, _("\
3583 Set whether gdb controls the inferior in asynchronous mode."), _("\
3584 Show whether gdb controls the inferior in asynchronous mode."), _("\
3585 Tells gdb whether to control the inferior in asynchronous mode."),
3586 maint_set_target_async_command
,
3587 maint_show_target_async_command
,
3588 &maintenance_set_cmdlist
,
3589 &maintenance_show_cmdlist
);
3591 add_setshow_boolean_cmd ("may-write-registers", class_support
,
3592 &may_write_registers_1
, _("\
3593 Set permission to write into registers."), _("\
3594 Show permission to write into registers."), _("\
3595 When this permission is on, GDB may write into the target's registers.\n\
3596 Otherwise, any sort of write attempt will result in an error."),
3597 set_target_permissions
, NULL
,
3598 &setlist
, &showlist
);
3600 add_setshow_boolean_cmd ("may-write-memory", class_support
,
3601 &may_write_memory_1
, _("\
3602 Set permission to write into target memory."), _("\
3603 Show permission to write into target memory."), _("\
3604 When this permission is on, GDB may write into the target's memory.\n\
3605 Otherwise, any sort of write attempt will result in an error."),
3606 set_write_memory_permission
, NULL
,
3607 &setlist
, &showlist
);
3609 add_setshow_boolean_cmd ("may-insert-breakpoints", class_support
,
3610 &may_insert_breakpoints_1
, _("\
3611 Set permission to insert breakpoints in the target."), _("\
3612 Show permission to insert breakpoints in the target."), _("\
3613 When this permission is on, GDB may insert breakpoints in the program.\n\
3614 Otherwise, any sort of insertion attempt will result in an error."),
3615 set_target_permissions
, NULL
,
3616 &setlist
, &showlist
);
3618 add_setshow_boolean_cmd ("may-insert-tracepoints", class_support
,
3619 &may_insert_tracepoints_1
, _("\
3620 Set permission to insert tracepoints in the target."), _("\
3621 Show permission to insert tracepoints in the target."), _("\
3622 When this permission is on, GDB may insert tracepoints in the program.\n\
3623 Otherwise, any sort of insertion attempt will result in an error."),
3624 set_target_permissions
, NULL
,
3625 &setlist
, &showlist
);
3627 add_setshow_boolean_cmd ("may-insert-fast-tracepoints", class_support
,
3628 &may_insert_fast_tracepoints_1
, _("\
3629 Set permission to insert fast tracepoints in the target."), _("\
3630 Show permission to insert fast tracepoints in the target."), _("\
3631 When this permission is on, GDB may insert fast tracepoints.\n\
3632 Otherwise, any sort of insertion attempt will result in an error."),
3633 set_target_permissions
, NULL
,
3634 &setlist
, &showlist
);
3636 add_setshow_boolean_cmd ("may-interrupt", class_support
,
3638 Set permission to interrupt or signal the target."), _("\
3639 Show permission to interrupt or signal the target."), _("\
3640 When this permission is on, GDB may interrupt/stop the target's execution.\n\
3641 Otherwise, any attempt to interrupt or stop will be ignored."),
3642 set_target_permissions
, NULL
,
3643 &setlist
, &showlist
);
3645 add_setshow_boolean_cmd ("auto-connect-native-target", class_support
,
3646 &auto_connect_native_target
, _("\
3647 Set whether GDB may automatically connect to the native target."), _("\
3648 Show whether GDB may automatically connect to the native target."), _("\
3649 When on, and GDB is not connected to a target yet, GDB\n\
3650 attempts \"run\" and other commands with the native target."),
3651 NULL
, show_auto_connect_native_target
,
3652 &setlist
, &showlist
);