1 /* Select target systems and architectures at runtime for GDB.
3 Copyright (C) 1990-2014 Free Software Foundation, Inc.
5 Contributed by Cygnus Support.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
26 #include "target-dcache.h"
37 #include "gdb_assert.h"
39 #include "exceptions.h"
40 #include "target-descriptions.h"
41 #include "gdbthread.h"
44 #include "inline-frame.h"
45 #include "tracepoint.h"
46 #include "gdb/fileio.h"
49 #include "target-debug.h"
51 static void target_info (char *, int);
53 static void generic_tls_error (void) ATTRIBUTE_NORETURN
;
55 static void default_terminal_info (struct target_ops
*, const char *, int);
57 static int default_watchpoint_addr_within_range (struct target_ops
*,
58 CORE_ADDR
, CORE_ADDR
, int);
60 static int default_region_ok_for_hw_watchpoint (struct target_ops
*,
63 static void default_rcmd (struct target_ops
*, const char *, struct ui_file
*);
65 static ptid_t
default_get_ada_task_ptid (struct target_ops
*self
,
68 static int default_follow_fork (struct target_ops
*self
, int follow_child
,
71 static void default_mourn_inferior (struct target_ops
*self
);
73 static int default_search_memory (struct target_ops
*ops
,
75 ULONGEST search_space_len
,
76 const gdb_byte
*pattern
,
78 CORE_ADDR
*found_addrp
);
80 static int default_verify_memory (struct target_ops
*self
,
82 CORE_ADDR memaddr
, ULONGEST size
);
84 static struct address_space
*default_thread_address_space
85 (struct target_ops
*self
, ptid_t ptid
);
87 static void tcomplain (void) ATTRIBUTE_NORETURN
;
89 static int return_zero (struct target_ops
*);
91 static int return_zero_has_execution (struct target_ops
*, ptid_t
);
93 static void target_command (char *, int);
95 static struct target_ops
*find_default_run_target (char *);
97 static struct gdbarch
*default_thread_architecture (struct target_ops
*ops
,
100 static int dummy_find_memory_regions (struct target_ops
*self
,
101 find_memory_region_ftype ignore1
,
104 static char *dummy_make_corefile_notes (struct target_ops
*self
,
105 bfd
*ignore1
, int *ignore2
);
107 static char *default_pid_to_str (struct target_ops
*ops
, ptid_t ptid
);
109 static enum exec_direction_kind default_execution_direction
110 (struct target_ops
*self
);
112 static CORE_ADDR
default_target_decr_pc_after_break (struct target_ops
*ops
,
113 struct gdbarch
*gdbarch
);
115 static struct target_ops debug_target
;
117 #include "target-delegates.c"
119 static void init_dummy_target (void);
121 /* Pointer to array of target architecture structures; the size of the
122 array; the current index into the array; the allocated size of the
124 struct target_ops
**target_structs
;
125 unsigned target_struct_size
;
126 unsigned target_struct_allocsize
;
127 #define DEFAULT_ALLOCSIZE 10
129 /* The initial current target, so that there is always a semi-valid
132 static struct target_ops dummy_target
;
134 /* Top of target stack. */
136 static struct target_ops
*target_stack
;
138 /* The target structure we are currently using to talk to a process
139 or file or whatever "inferior" we have. */
141 struct target_ops current_target
;
143 /* Command list for target. */
145 static struct cmd_list_element
*targetlist
= NULL
;
147 /* Nonzero if we should trust readonly sections from the
148 executable when reading memory. */
150 static int trust_readonly
= 0;
152 /* Nonzero if we should show true memory content including
153 memory breakpoint inserted by gdb. */
155 static int show_memory_breakpoints
= 0;
157 /* These globals control whether GDB attempts to perform these
158 operations; they are useful for targets that need to prevent
159 inadvertant disruption, such as in non-stop mode. */
161 int may_write_registers
= 1;
163 int may_write_memory
= 1;
165 int may_insert_breakpoints
= 1;
167 int may_insert_tracepoints
= 1;
169 int may_insert_fast_tracepoints
= 1;
173 /* Non-zero if we want to see trace of target level stuff. */
175 static unsigned int targetdebug
= 0;
177 show_targetdebug (struct ui_file
*file
, int from_tty
,
178 struct cmd_list_element
*c
, const char *value
)
180 fprintf_filtered (file
, _("Target debugging is %s.\n"), value
);
183 static void setup_target_debug (void);
185 /* The user just typed 'target' without the name of a target. */
188 target_command (char *arg
, int from_tty
)
190 fputs_filtered ("Argument required (target name). Try `help target'\n",
194 /* Default target_has_* methods for process_stratum targets. */
197 default_child_has_all_memory (struct target_ops
*ops
)
199 /* If no inferior selected, then we can't read memory here. */
200 if (ptid_equal (inferior_ptid
, null_ptid
))
207 default_child_has_memory (struct target_ops
*ops
)
209 /* If no inferior selected, then we can't read memory here. */
210 if (ptid_equal (inferior_ptid
, null_ptid
))
217 default_child_has_stack (struct target_ops
*ops
)
219 /* If no inferior selected, there's no stack. */
220 if (ptid_equal (inferior_ptid
, null_ptid
))
227 default_child_has_registers (struct target_ops
*ops
)
229 /* Can't read registers from no inferior. */
230 if (ptid_equal (inferior_ptid
, null_ptid
))
237 default_child_has_execution (struct target_ops
*ops
, ptid_t the_ptid
)
239 /* If there's no thread selected, then we can't make it run through
241 if (ptid_equal (the_ptid
, null_ptid
))
249 target_has_all_memory_1 (void)
251 struct target_ops
*t
;
253 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
254 if (t
->to_has_all_memory (t
))
261 target_has_memory_1 (void)
263 struct target_ops
*t
;
265 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
266 if (t
->to_has_memory (t
))
273 target_has_stack_1 (void)
275 struct target_ops
*t
;
277 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
278 if (t
->to_has_stack (t
))
285 target_has_registers_1 (void)
287 struct target_ops
*t
;
289 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
290 if (t
->to_has_registers (t
))
297 target_has_execution_1 (ptid_t the_ptid
)
299 struct target_ops
*t
;
301 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
302 if (t
->to_has_execution (t
, the_ptid
))
309 target_has_execution_current (void)
311 return target_has_execution_1 (inferior_ptid
);
314 /* Complete initialization of T. This ensures that various fields in
315 T are set, if needed by the target implementation. */
318 complete_target_initialization (struct target_ops
*t
)
320 /* Provide default values for all "must have" methods. */
322 if (t
->to_has_all_memory
== NULL
)
323 t
->to_has_all_memory
= return_zero
;
325 if (t
->to_has_memory
== NULL
)
326 t
->to_has_memory
= return_zero
;
328 if (t
->to_has_stack
== NULL
)
329 t
->to_has_stack
= return_zero
;
331 if (t
->to_has_registers
== NULL
)
332 t
->to_has_registers
= return_zero
;
334 if (t
->to_has_execution
== NULL
)
335 t
->to_has_execution
= return_zero_has_execution
;
337 /* These methods can be called on an unpushed target and so require
338 a default implementation if the target might plausibly be the
339 default run target. */
340 gdb_assert (t
->to_can_run
== NULL
|| (t
->to_can_async_p
!= NULL
341 && t
->to_supports_non_stop
!= NULL
));
343 install_delegators (t
);
346 /* This is used to implement the various target commands. */
349 open_target (char *args
, int from_tty
, struct cmd_list_element
*command
)
351 struct target_ops
*ops
= get_cmd_context (command
);
354 fprintf_unfiltered (gdb_stdlog
, "-> %s->to_open (...)\n",
357 ops
->to_open (args
, from_tty
);
360 fprintf_unfiltered (gdb_stdlog
, "<- %s->to_open (%s, %d)\n",
361 ops
->to_shortname
, args
, from_tty
);
364 /* Add possible target architecture T to the list and add a new
365 command 'target T->to_shortname'. Set COMPLETER as the command's
366 completer if not NULL. */
369 add_target_with_completer (struct target_ops
*t
,
370 completer_ftype
*completer
)
372 struct cmd_list_element
*c
;
374 complete_target_initialization (t
);
378 target_struct_allocsize
= DEFAULT_ALLOCSIZE
;
379 target_structs
= (struct target_ops
**) xmalloc
380 (target_struct_allocsize
* sizeof (*target_structs
));
382 if (target_struct_size
>= target_struct_allocsize
)
384 target_struct_allocsize
*= 2;
385 target_structs
= (struct target_ops
**)
386 xrealloc ((char *) target_structs
,
387 target_struct_allocsize
* sizeof (*target_structs
));
389 target_structs
[target_struct_size
++] = t
;
391 if (targetlist
== NULL
)
392 add_prefix_cmd ("target", class_run
, target_command
, _("\
393 Connect to a target machine or process.\n\
394 The first argument is the type or protocol of the target machine.\n\
395 Remaining arguments are interpreted by the target protocol. For more\n\
396 information on the arguments for a particular protocol, type\n\
397 `help target ' followed by the protocol name."),
398 &targetlist
, "target ", 0, &cmdlist
);
399 c
= add_cmd (t
->to_shortname
, no_class
, NULL
, t
->to_doc
, &targetlist
);
400 set_cmd_sfunc (c
, open_target
);
401 set_cmd_context (c
, t
);
402 if (completer
!= NULL
)
403 set_cmd_completer (c
, completer
);
406 /* Add a possible target architecture to the list. */
409 add_target (struct target_ops
*t
)
411 add_target_with_completer (t
, NULL
);
417 add_deprecated_target_alias (struct target_ops
*t
, char *alias
)
419 struct cmd_list_element
*c
;
422 /* If we use add_alias_cmd, here, we do not get the deprecated warning,
424 c
= add_cmd (alias
, no_class
, NULL
, t
->to_doc
, &targetlist
);
425 set_cmd_sfunc (c
, open_target
);
426 set_cmd_context (c
, t
);
427 alt
= xstrprintf ("target %s", t
->to_shortname
);
428 deprecate_cmd (c
, alt
);
436 current_target
.to_kill (¤t_target
);
440 target_load (const char *arg
, int from_tty
)
442 target_dcache_invalidate ();
443 (*current_target
.to_load
) (¤t_target
, arg
, from_tty
);
447 target_terminal_inferior (void)
449 /* A background resume (``run&'') should leave GDB in control of the
450 terminal. Use target_can_async_p, not target_is_async_p, since at
451 this point the target is not async yet. However, if sync_execution
452 is not set, we know it will become async prior to resume. */
453 if (target_can_async_p () && !sync_execution
)
456 /* If GDB is resuming the inferior in the foreground, install
457 inferior's terminal modes. */
458 (*current_target
.to_terminal_inferior
) (¤t_target
);
464 target_supports_terminal_ours (void)
466 struct target_ops
*t
;
468 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
470 if (t
->to_terminal_ours
!= delegate_terminal_ours
471 && t
->to_terminal_ours
!= tdefault_terminal_ours
)
481 error (_("You can't do that when your target is `%s'"),
482 current_target
.to_shortname
);
488 error (_("You can't do that without a process to debug."));
492 default_terminal_info (struct target_ops
*self
, const char *args
, int from_tty
)
494 printf_unfiltered (_("No saved terminal information.\n"));
497 /* A default implementation for the to_get_ada_task_ptid target method.
499 This function builds the PTID by using both LWP and TID as part of
500 the PTID lwp and tid elements. The pid used is the pid of the
504 default_get_ada_task_ptid (struct target_ops
*self
, long lwp
, long tid
)
506 return ptid_build (ptid_get_pid (inferior_ptid
), lwp
, tid
);
509 static enum exec_direction_kind
510 default_execution_direction (struct target_ops
*self
)
512 if (!target_can_execute_reverse
)
514 else if (!target_can_async_p ())
517 gdb_assert_not_reached ("\
518 to_execution_direction must be implemented for reverse async");
521 /* Go through the target stack from top to bottom, copying over zero
522 entries in current_target, then filling in still empty entries. In
523 effect, we are doing class inheritance through the pushed target
526 NOTE: cagney/2003-10-17: The problem with this inheritance, as it
527 is currently implemented, is that it discards any knowledge of
528 which target an inherited method originally belonged to.
529 Consequently, new new target methods should instead explicitly and
530 locally search the target stack for the target that can handle the
534 update_current_target (void)
536 struct target_ops
*t
;
538 /* First, reset current's contents. */
539 memset (¤t_target
, 0, sizeof (current_target
));
541 /* Install the delegators. */
542 install_delegators (¤t_target
);
544 current_target
.to_stratum
= target_stack
->to_stratum
;
546 #define INHERIT(FIELD, TARGET) \
547 if (!current_target.FIELD) \
548 current_target.FIELD = (TARGET)->FIELD
550 /* Do not add any new INHERITs here. Instead, use the delegation
551 mechanism provided by make-target-delegates. */
552 for (t
= target_stack
; t
; t
= t
->beneath
)
554 INHERIT (to_shortname
, t
);
555 INHERIT (to_longname
, t
);
556 INHERIT (to_attach_no_wait
, t
);
557 INHERIT (to_have_steppable_watchpoint
, t
);
558 INHERIT (to_have_continuable_watchpoint
, t
);
559 INHERIT (to_has_thread_control
, t
);
563 /* Finally, position the target-stack beneath the squashed
564 "current_target". That way code looking for a non-inherited
565 target method can quickly and simply find it. */
566 current_target
.beneath
= target_stack
;
569 setup_target_debug ();
572 /* Push a new target type into the stack of the existing target accessors,
573 possibly superseding some of the existing accessors.
575 Rather than allow an empty stack, we always have the dummy target at
576 the bottom stratum, so we can call the function vectors without
580 push_target (struct target_ops
*t
)
582 struct target_ops
**cur
;
584 /* Check magic number. If wrong, it probably means someone changed
585 the struct definition, but not all the places that initialize one. */
586 if (t
->to_magic
!= OPS_MAGIC
)
588 fprintf_unfiltered (gdb_stderr
,
589 "Magic number of %s target struct wrong\n",
591 internal_error (__FILE__
, __LINE__
,
592 _("failed internal consistency check"));
595 /* Find the proper stratum to install this target in. */
596 for (cur
= &target_stack
; (*cur
) != NULL
; cur
= &(*cur
)->beneath
)
598 if ((int) (t
->to_stratum
) >= (int) (*cur
)->to_stratum
)
602 /* If there's already targets at this stratum, remove them. */
603 /* FIXME: cagney/2003-10-15: I think this should be popping all
604 targets to CUR, and not just those at this stratum level. */
605 while ((*cur
) != NULL
&& t
->to_stratum
== (*cur
)->to_stratum
)
607 /* There's already something at this stratum level. Close it,
608 and un-hook it from the stack. */
609 struct target_ops
*tmp
= (*cur
);
611 (*cur
) = (*cur
)->beneath
;
616 /* We have removed all targets in our stratum, now add the new one. */
620 update_current_target ();
623 /* Remove a target_ops vector from the stack, wherever it may be.
624 Return how many times it was removed (0 or 1). */
627 unpush_target (struct target_ops
*t
)
629 struct target_ops
**cur
;
630 struct target_ops
*tmp
;
632 if (t
->to_stratum
== dummy_stratum
)
633 internal_error (__FILE__
, __LINE__
,
634 _("Attempt to unpush the dummy target"));
636 /* Look for the specified target. Note that we assume that a target
637 can only occur once in the target stack. */
639 for (cur
= &target_stack
; (*cur
) != NULL
; cur
= &(*cur
)->beneath
)
645 /* If we don't find target_ops, quit. Only open targets should be
650 /* Unchain the target. */
652 (*cur
) = (*cur
)->beneath
;
655 update_current_target ();
657 /* Finally close the target. Note we do this after unchaining, so
658 any target method calls from within the target_close
659 implementation don't end up in T anymore. */
666 pop_all_targets_above (enum strata above_stratum
)
668 while ((int) (current_target
.to_stratum
) > (int) above_stratum
)
670 if (!unpush_target (target_stack
))
672 fprintf_unfiltered (gdb_stderr
,
673 "pop_all_targets couldn't find target %s\n",
674 target_stack
->to_shortname
);
675 internal_error (__FILE__
, __LINE__
,
676 _("failed internal consistency check"));
683 pop_all_targets (void)
685 pop_all_targets_above (dummy_stratum
);
688 /* Return 1 if T is now pushed in the target stack. Return 0 otherwise. */
691 target_is_pushed (struct target_ops
*t
)
693 struct target_ops
*cur
;
695 /* Check magic number. If wrong, it probably means someone changed
696 the struct definition, but not all the places that initialize one. */
697 if (t
->to_magic
!= OPS_MAGIC
)
699 fprintf_unfiltered (gdb_stderr
,
700 "Magic number of %s target struct wrong\n",
702 internal_error (__FILE__
, __LINE__
,
703 _("failed internal consistency check"));
706 for (cur
= target_stack
; cur
!= NULL
; cur
= cur
->beneath
)
713 /* Default implementation of to_get_thread_local_address. */
716 generic_tls_error (void)
718 throw_error (TLS_GENERIC_ERROR
,
719 _("Cannot find thread-local variables on this target"));
722 /* Using the objfile specified in OBJFILE, find the address for the
723 current thread's thread-local storage with offset OFFSET. */
725 target_translate_tls_address (struct objfile
*objfile
, CORE_ADDR offset
)
727 volatile CORE_ADDR addr
= 0;
728 struct target_ops
*target
= ¤t_target
;
730 if (gdbarch_fetch_tls_load_module_address_p (target_gdbarch ()))
732 ptid_t ptid
= inferior_ptid
;
733 volatile struct gdb_exception ex
;
735 TRY_CATCH (ex
, RETURN_MASK_ALL
)
739 /* Fetch the load module address for this objfile. */
740 lm_addr
= gdbarch_fetch_tls_load_module_address (target_gdbarch (),
743 addr
= target
->to_get_thread_local_address (target
, ptid
,
746 /* If an error occurred, print TLS related messages here. Otherwise,
747 throw the error to some higher catcher. */
750 int objfile_is_library
= (objfile
->flags
& OBJF_SHARED
);
754 case TLS_NO_LIBRARY_SUPPORT_ERROR
:
755 error (_("Cannot find thread-local variables "
756 "in this thread library."));
758 case TLS_LOAD_MODULE_NOT_FOUND_ERROR
:
759 if (objfile_is_library
)
760 error (_("Cannot find shared library `%s' in dynamic"
761 " linker's load module list"), objfile_name (objfile
));
763 error (_("Cannot find executable file `%s' in dynamic"
764 " linker's load module list"), objfile_name (objfile
));
766 case TLS_NOT_ALLOCATED_YET_ERROR
:
767 if (objfile_is_library
)
768 error (_("The inferior has not yet allocated storage for"
769 " thread-local variables in\n"
770 "the shared library `%s'\n"
772 objfile_name (objfile
), target_pid_to_str (ptid
));
774 error (_("The inferior has not yet allocated storage for"
775 " thread-local variables in\n"
776 "the executable `%s'\n"
778 objfile_name (objfile
), target_pid_to_str (ptid
));
780 case TLS_GENERIC_ERROR
:
781 if (objfile_is_library
)
782 error (_("Cannot find thread-local storage for %s, "
783 "shared library %s:\n%s"),
784 target_pid_to_str (ptid
),
785 objfile_name (objfile
), ex
.message
);
787 error (_("Cannot find thread-local storage for %s, "
788 "executable file %s:\n%s"),
789 target_pid_to_str (ptid
),
790 objfile_name (objfile
), ex
.message
);
793 throw_exception (ex
);
798 /* It wouldn't be wrong here to try a gdbarch method, too; finding
799 TLS is an ABI-specific thing. But we don't do that yet. */
801 error (_("Cannot find thread-local variables on this target"));
807 target_xfer_status_to_string (enum target_xfer_status status
)
809 #define CASE(X) case X: return #X
812 CASE(TARGET_XFER_E_IO
);
813 CASE(TARGET_XFER_UNAVAILABLE
);
822 #define MIN(A, B) (((A) <= (B)) ? (A) : (B))
824 /* target_read_string -- read a null terminated string, up to LEN bytes,
825 from MEMADDR in target. Set *ERRNOP to the errno code, or 0 if successful.
826 Set *STRING to a pointer to malloc'd memory containing the data; the caller
827 is responsible for freeing it. Return the number of bytes successfully
831 target_read_string (CORE_ADDR memaddr
, char **string
, int len
, int *errnop
)
837 int buffer_allocated
;
839 unsigned int nbytes_read
= 0;
843 /* Small for testing. */
844 buffer_allocated
= 4;
845 buffer
= xmalloc (buffer_allocated
);
850 tlen
= MIN (len
, 4 - (memaddr
& 3));
851 offset
= memaddr
& 3;
853 errcode
= target_read_memory (memaddr
& ~3, buf
, sizeof buf
);
856 /* The transfer request might have crossed the boundary to an
857 unallocated region of memory. Retry the transfer, requesting
861 errcode
= target_read_memory (memaddr
, buf
, 1);
866 if (bufptr
- buffer
+ tlen
> buffer_allocated
)
870 bytes
= bufptr
- buffer
;
871 buffer_allocated
*= 2;
872 buffer
= xrealloc (buffer
, buffer_allocated
);
873 bufptr
= buffer
+ bytes
;
876 for (i
= 0; i
< tlen
; i
++)
878 *bufptr
++ = buf
[i
+ offset
];
879 if (buf
[i
+ offset
] == '\000')
881 nbytes_read
+= i
+ 1;
897 struct target_section_table
*
898 target_get_section_table (struct target_ops
*target
)
900 return (*target
->to_get_section_table
) (target
);
903 /* Find a section containing ADDR. */
905 struct target_section
*
906 target_section_by_addr (struct target_ops
*target
, CORE_ADDR addr
)
908 struct target_section_table
*table
= target_get_section_table (target
);
909 struct target_section
*secp
;
914 for (secp
= table
->sections
; secp
< table
->sections_end
; secp
++)
916 if (addr
>= secp
->addr
&& addr
< secp
->endaddr
)
922 /* Read memory from more than one valid target. A core file, for
923 instance, could have some of memory but delegate other bits to
924 the target below it. So, we must manually try all targets. */
926 static enum target_xfer_status
927 raw_memory_xfer_partial (struct target_ops
*ops
, gdb_byte
*readbuf
,
928 const gdb_byte
*writebuf
, ULONGEST memaddr
, LONGEST len
,
929 ULONGEST
*xfered_len
)
931 enum target_xfer_status res
;
935 res
= ops
->to_xfer_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
936 readbuf
, writebuf
, memaddr
, len
,
938 if (res
== TARGET_XFER_OK
)
941 /* Stop if the target reports that the memory is not available. */
942 if (res
== TARGET_XFER_UNAVAILABLE
)
945 /* We want to continue past core files to executables, but not
946 past a running target's memory. */
947 if (ops
->to_has_all_memory (ops
))
954 /* The cache works at the raw memory level. Make sure the cache
955 gets updated with raw contents no matter what kind of memory
956 object was originally being written. Note we do write-through
957 first, so that if it fails, we don't write to the cache contents
958 that never made it to the target. */
960 && !ptid_equal (inferior_ptid
, null_ptid
)
961 && target_dcache_init_p ()
962 && (stack_cache_enabled_p () || code_cache_enabled_p ()))
964 DCACHE
*dcache
= target_dcache_get ();
966 /* Note that writing to an area of memory which wasn't present
967 in the cache doesn't cause it to be loaded in. */
968 dcache_update (dcache
, res
, memaddr
, writebuf
, *xfered_len
);
974 /* Perform a partial memory transfer.
975 For docs see target.h, to_xfer_partial. */
977 static enum target_xfer_status
978 memory_xfer_partial_1 (struct target_ops
*ops
, enum target_object object
,
979 gdb_byte
*readbuf
, const gdb_byte
*writebuf
, ULONGEST memaddr
,
980 ULONGEST len
, ULONGEST
*xfered_len
)
982 enum target_xfer_status res
;
984 struct mem_region
*region
;
985 struct inferior
*inf
;
987 /* For accesses to unmapped overlay sections, read directly from
988 files. Must do this first, as MEMADDR may need adjustment. */
989 if (readbuf
!= NULL
&& overlay_debugging
)
991 struct obj_section
*section
= find_pc_overlay (memaddr
);
993 if (pc_in_unmapped_range (memaddr
, section
))
995 struct target_section_table
*table
996 = target_get_section_table (ops
);
997 const char *section_name
= section
->the_bfd_section
->name
;
999 memaddr
= overlay_mapped_address (memaddr
, section
);
1000 return section_table_xfer_memory_partial (readbuf
, writebuf
,
1001 memaddr
, len
, xfered_len
,
1003 table
->sections_end
,
1008 /* Try the executable files, if "trust-readonly-sections" is set. */
1009 if (readbuf
!= NULL
&& trust_readonly
)
1011 struct target_section
*secp
;
1012 struct target_section_table
*table
;
1014 secp
= target_section_by_addr (ops
, memaddr
);
1016 && (bfd_get_section_flags (secp
->the_bfd_section
->owner
,
1017 secp
->the_bfd_section
)
1020 table
= target_get_section_table (ops
);
1021 return section_table_xfer_memory_partial (readbuf
, writebuf
,
1022 memaddr
, len
, xfered_len
,
1024 table
->sections_end
,
1029 /* Try GDB's internal data cache. */
1030 region
= lookup_mem_region (memaddr
);
1031 /* region->hi == 0 means there's no upper bound. */
1032 if (memaddr
+ len
< region
->hi
|| region
->hi
== 0)
1035 reg_len
= region
->hi
- memaddr
;
1037 switch (region
->attrib
.mode
)
1040 if (writebuf
!= NULL
)
1041 return TARGET_XFER_E_IO
;
1045 if (readbuf
!= NULL
)
1046 return TARGET_XFER_E_IO
;
1050 /* We only support writing to flash during "load" for now. */
1051 if (writebuf
!= NULL
)
1052 error (_("Writing to flash memory forbidden in this context"));
1056 return TARGET_XFER_E_IO
;
1059 if (!ptid_equal (inferior_ptid
, null_ptid
))
1060 inf
= find_inferior_pid (ptid_get_pid (inferior_ptid
));
1066 /* The dcache reads whole cache lines; that doesn't play well
1067 with reading from a trace buffer, because reading outside of
1068 the collected memory range fails. */
1069 && get_traceframe_number () == -1
1070 && (region
->attrib
.cache
1071 || (stack_cache_enabled_p () && object
== TARGET_OBJECT_STACK_MEMORY
)
1072 || (code_cache_enabled_p () && object
== TARGET_OBJECT_CODE_MEMORY
)))
1074 DCACHE
*dcache
= target_dcache_get_or_init ();
1076 return dcache_read_memory_partial (ops
, dcache
, memaddr
, readbuf
,
1077 reg_len
, xfered_len
);
1080 /* If none of those methods found the memory we wanted, fall back
1081 to a target partial transfer. Normally a single call to
1082 to_xfer_partial is enough; if it doesn't recognize an object
1083 it will call the to_xfer_partial of the next target down.
1084 But for memory this won't do. Memory is the only target
1085 object which can be read from more than one valid target.
1086 A core file, for instance, could have some of memory but
1087 delegate other bits to the target below it. So, we must
1088 manually try all targets. */
1090 res
= raw_memory_xfer_partial (ops
, readbuf
, writebuf
, memaddr
, reg_len
,
1093 /* If we still haven't got anything, return the last error. We
1098 /* Perform a partial memory transfer. For docs see target.h,
1101 static enum target_xfer_status
1102 memory_xfer_partial (struct target_ops
*ops
, enum target_object object
,
1103 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1104 ULONGEST memaddr
, ULONGEST len
, ULONGEST
*xfered_len
)
1106 enum target_xfer_status res
;
1108 /* Zero length requests are ok and require no work. */
1110 return TARGET_XFER_EOF
;
1112 /* Fill in READBUF with breakpoint shadows, or WRITEBUF with
1113 breakpoint insns, thus hiding out from higher layers whether
1114 there are software breakpoints inserted in the code stream. */
1115 if (readbuf
!= NULL
)
1117 res
= memory_xfer_partial_1 (ops
, object
, readbuf
, NULL
, memaddr
, len
,
1120 if (res
== TARGET_XFER_OK
&& !show_memory_breakpoints
)
1121 breakpoint_xfer_memory (readbuf
, NULL
, NULL
, memaddr
, *xfered_len
);
1126 struct cleanup
*old_chain
;
1128 /* A large write request is likely to be partially satisfied
1129 by memory_xfer_partial_1. We will continually malloc
1130 and free a copy of the entire write request for breakpoint
1131 shadow handling even though we only end up writing a small
1132 subset of it. Cap writes to 4KB to mitigate this. */
1133 len
= min (4096, len
);
1135 buf
= xmalloc (len
);
1136 old_chain
= make_cleanup (xfree
, buf
);
1137 memcpy (buf
, writebuf
, len
);
1139 breakpoint_xfer_memory (NULL
, buf
, writebuf
, memaddr
, len
);
1140 res
= memory_xfer_partial_1 (ops
, object
, NULL
, buf
, memaddr
, len
,
1143 do_cleanups (old_chain
);
1150 restore_show_memory_breakpoints (void *arg
)
1152 show_memory_breakpoints
= (uintptr_t) arg
;
1156 make_show_memory_breakpoints_cleanup (int show
)
1158 int current
= show_memory_breakpoints
;
1160 show_memory_breakpoints
= show
;
1161 return make_cleanup (restore_show_memory_breakpoints
,
1162 (void *) (uintptr_t) current
);
1165 /* For docs see target.h, to_xfer_partial. */
1167 enum target_xfer_status
1168 target_xfer_partial (struct target_ops
*ops
,
1169 enum target_object object
, const char *annex
,
1170 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1171 ULONGEST offset
, ULONGEST len
,
1172 ULONGEST
*xfered_len
)
1174 enum target_xfer_status retval
;
1176 gdb_assert (ops
->to_xfer_partial
!= NULL
);
1178 /* Transfer is done when LEN is zero. */
1180 return TARGET_XFER_EOF
;
1182 if (writebuf
&& !may_write_memory
)
1183 error (_("Writing to memory is not allowed (addr %s, len %s)"),
1184 core_addr_to_string_nz (offset
), plongest (len
));
1188 /* If this is a memory transfer, let the memory-specific code
1189 have a look at it instead. Memory transfers are more
1191 if (object
== TARGET_OBJECT_MEMORY
|| object
== TARGET_OBJECT_STACK_MEMORY
1192 || object
== TARGET_OBJECT_CODE_MEMORY
)
1193 retval
= memory_xfer_partial (ops
, object
, readbuf
,
1194 writebuf
, offset
, len
, xfered_len
);
1195 else if (object
== TARGET_OBJECT_RAW_MEMORY
)
1197 /* Request the normal memory object from other layers. */
1198 retval
= raw_memory_xfer_partial (ops
, readbuf
, writebuf
, offset
, len
,
1202 retval
= ops
->to_xfer_partial (ops
, object
, annex
, readbuf
,
1203 writebuf
, offset
, len
, xfered_len
);
1207 const unsigned char *myaddr
= NULL
;
1209 fprintf_unfiltered (gdb_stdlog
,
1210 "%s:target_xfer_partial "
1211 "(%d, %s, %s, %s, %s, %s) = %d, %s",
1214 (annex
? annex
: "(null)"),
1215 host_address_to_string (readbuf
),
1216 host_address_to_string (writebuf
),
1217 core_addr_to_string_nz (offset
),
1218 pulongest (len
), retval
,
1219 pulongest (*xfered_len
));
1225 if (retval
== TARGET_XFER_OK
&& myaddr
!= NULL
)
1229 fputs_unfiltered (", bytes =", gdb_stdlog
);
1230 for (i
= 0; i
< *xfered_len
; i
++)
1232 if ((((intptr_t) &(myaddr
[i
])) & 0xf) == 0)
1234 if (targetdebug
< 2 && i
> 0)
1236 fprintf_unfiltered (gdb_stdlog
, " ...");
1239 fprintf_unfiltered (gdb_stdlog
, "\n");
1242 fprintf_unfiltered (gdb_stdlog
, " %02x", myaddr
[i
] & 0xff);
1246 fputc_unfiltered ('\n', gdb_stdlog
);
1249 /* Check implementations of to_xfer_partial update *XFERED_LEN
1250 properly. Do assertion after printing debug messages, so that we
1251 can find more clues on assertion failure from debugging messages. */
1252 if (retval
== TARGET_XFER_OK
|| retval
== TARGET_XFER_UNAVAILABLE
)
1253 gdb_assert (*xfered_len
> 0);
1258 /* Read LEN bytes of target memory at address MEMADDR, placing the
1259 results in GDB's memory at MYADDR. Returns either 0 for success or
1260 TARGET_XFER_E_IO if any error occurs.
1262 If an error occurs, no guarantee is made about the contents of the data at
1263 MYADDR. In particular, the caller should not depend upon partial reads
1264 filling the buffer with good data. There is no way for the caller to know
1265 how much good data might have been transfered anyway. Callers that can
1266 deal with partial reads should call target_read (which will retry until
1267 it makes no progress, and then return how much was transferred). */
1270 target_read_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1272 /* Dispatch to the topmost target, not the flattened current_target.
1273 Memory accesses check target->to_has_(all_)memory, and the
1274 flattened target doesn't inherit those. */
1275 if (target_read (current_target
.beneath
, TARGET_OBJECT_MEMORY
, NULL
,
1276 myaddr
, memaddr
, len
) == len
)
1279 return TARGET_XFER_E_IO
;
1282 /* Like target_read_memory, but specify explicitly that this is a read
1283 from the target's raw memory. That is, this read bypasses the
1284 dcache, breakpoint shadowing, etc. */
1287 target_read_raw_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1289 /* See comment in target_read_memory about why the request starts at
1290 current_target.beneath. */
1291 if (target_read (current_target
.beneath
, TARGET_OBJECT_RAW_MEMORY
, NULL
,
1292 myaddr
, memaddr
, len
) == len
)
1295 return TARGET_XFER_E_IO
;
1298 /* Like target_read_memory, but specify explicitly that this is a read from
1299 the target's stack. This may trigger different cache behavior. */
1302 target_read_stack (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1304 /* See comment in target_read_memory about why the request starts at
1305 current_target.beneath. */
1306 if (target_read (current_target
.beneath
, TARGET_OBJECT_STACK_MEMORY
, NULL
,
1307 myaddr
, memaddr
, len
) == len
)
1310 return TARGET_XFER_E_IO
;
1313 /* Like target_read_memory, but specify explicitly that this is a read from
1314 the target's code. This may trigger different cache behavior. */
1317 target_read_code (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1319 /* See comment in target_read_memory about why the request starts at
1320 current_target.beneath. */
1321 if (target_read (current_target
.beneath
, TARGET_OBJECT_CODE_MEMORY
, NULL
,
1322 myaddr
, memaddr
, len
) == len
)
1325 return TARGET_XFER_E_IO
;
1328 /* Write LEN bytes from MYADDR to target memory at address MEMADDR.
1329 Returns either 0 for success or TARGET_XFER_E_IO if any
1330 error occurs. If an error occurs, no guarantee is made about how
1331 much data got written. Callers that can deal with partial writes
1332 should call target_write. */
1335 target_write_memory (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ssize_t len
)
1337 /* See comment in target_read_memory about why the request starts at
1338 current_target.beneath. */
1339 if (target_write (current_target
.beneath
, TARGET_OBJECT_MEMORY
, NULL
,
1340 myaddr
, memaddr
, len
) == len
)
1343 return TARGET_XFER_E_IO
;
1346 /* Write LEN bytes from MYADDR to target raw memory at address
1347 MEMADDR. Returns either 0 for success or TARGET_XFER_E_IO
1348 if any error occurs. If an error occurs, no guarantee is made
1349 about how much data got written. Callers that can deal with
1350 partial writes should call target_write. */
1353 target_write_raw_memory (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ssize_t len
)
1355 /* See comment in target_read_memory about why the request starts at
1356 current_target.beneath. */
1357 if (target_write (current_target
.beneath
, TARGET_OBJECT_RAW_MEMORY
, NULL
,
1358 myaddr
, memaddr
, len
) == len
)
1361 return TARGET_XFER_E_IO
;
1364 /* Fetch the target's memory map. */
1367 target_memory_map (void)
1369 VEC(mem_region_s
) *result
;
1370 struct mem_region
*last_one
, *this_one
;
1372 struct target_ops
*t
;
1374 result
= current_target
.to_memory_map (¤t_target
);
1378 qsort (VEC_address (mem_region_s
, result
),
1379 VEC_length (mem_region_s
, result
),
1380 sizeof (struct mem_region
), mem_region_cmp
);
1382 /* Check that regions do not overlap. Simultaneously assign
1383 a numbering for the "mem" commands to use to refer to
1386 for (ix
= 0; VEC_iterate (mem_region_s
, result
, ix
, this_one
); ix
++)
1388 this_one
->number
= ix
;
1390 if (last_one
&& last_one
->hi
> this_one
->lo
)
1392 warning (_("Overlapping regions in memory map: ignoring"));
1393 VEC_free (mem_region_s
, result
);
1396 last_one
= this_one
;
1403 target_flash_erase (ULONGEST address
, LONGEST length
)
1405 current_target
.to_flash_erase (¤t_target
, address
, length
);
1409 target_flash_done (void)
1411 current_target
.to_flash_done (¤t_target
);
1415 show_trust_readonly (struct ui_file
*file
, int from_tty
,
1416 struct cmd_list_element
*c
, const char *value
)
1418 fprintf_filtered (file
,
1419 _("Mode for reading from readonly sections is %s.\n"),
1423 /* Target vector read/write partial wrapper functions. */
1425 static enum target_xfer_status
1426 target_read_partial (struct target_ops
*ops
,
1427 enum target_object object
,
1428 const char *annex
, gdb_byte
*buf
,
1429 ULONGEST offset
, ULONGEST len
,
1430 ULONGEST
*xfered_len
)
1432 return target_xfer_partial (ops
, object
, annex
, buf
, NULL
, offset
, len
,
1436 static enum target_xfer_status
1437 target_write_partial (struct target_ops
*ops
,
1438 enum target_object object
,
1439 const char *annex
, const gdb_byte
*buf
,
1440 ULONGEST offset
, LONGEST len
, ULONGEST
*xfered_len
)
1442 return target_xfer_partial (ops
, object
, annex
, NULL
, buf
, offset
, len
,
1446 /* Wrappers to perform the full transfer. */
1448 /* For docs on target_read see target.h. */
1451 target_read (struct target_ops
*ops
,
1452 enum target_object object
,
1453 const char *annex
, gdb_byte
*buf
,
1454 ULONGEST offset
, LONGEST len
)
1458 while (xfered
< len
)
1460 ULONGEST xfered_len
;
1461 enum target_xfer_status status
;
1463 status
= target_read_partial (ops
, object
, annex
,
1464 (gdb_byte
*) buf
+ xfered
,
1465 offset
+ xfered
, len
- xfered
,
1468 /* Call an observer, notifying them of the xfer progress? */
1469 if (status
== TARGET_XFER_EOF
)
1471 else if (status
== TARGET_XFER_OK
)
1473 xfered
+= xfered_len
;
1483 /* Assuming that the entire [begin, end) range of memory cannot be
1484 read, try to read whatever subrange is possible to read.
1486 The function returns, in RESULT, either zero or one memory block.
1487 If there's a readable subrange at the beginning, it is completely
1488 read and returned. Any further readable subrange will not be read.
1489 Otherwise, if there's a readable subrange at the end, it will be
1490 completely read and returned. Any readable subranges before it
1491 (obviously, not starting at the beginning), will be ignored. In
1492 other cases -- either no readable subrange, or readable subrange(s)
1493 that is neither at the beginning, or end, nothing is returned.
1495 The purpose of this function is to handle a read across a boundary
1496 of accessible memory in a case when memory map is not available.
1497 The above restrictions are fine for this case, but will give
1498 incorrect results if the memory is 'patchy'. However, supporting
1499 'patchy' memory would require trying to read every single byte,
1500 and it seems unacceptable solution. Explicit memory map is
1501 recommended for this case -- and target_read_memory_robust will
1502 take care of reading multiple ranges then. */
1505 read_whatever_is_readable (struct target_ops
*ops
,
1506 ULONGEST begin
, ULONGEST end
,
1507 VEC(memory_read_result_s
) **result
)
1509 gdb_byte
*buf
= xmalloc (end
- begin
);
1510 ULONGEST current_begin
= begin
;
1511 ULONGEST current_end
= end
;
1513 memory_read_result_s r
;
1514 ULONGEST xfered_len
;
1516 /* If we previously failed to read 1 byte, nothing can be done here. */
1517 if (end
- begin
<= 1)
1523 /* Check that either first or the last byte is readable, and give up
1524 if not. This heuristic is meant to permit reading accessible memory
1525 at the boundary of accessible region. */
1526 if (target_read_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1527 buf
, begin
, 1, &xfered_len
) == TARGET_XFER_OK
)
1532 else if (target_read_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1533 buf
+ (end
-begin
) - 1, end
- 1, 1,
1534 &xfered_len
) == TARGET_XFER_OK
)
1545 /* Loop invariant is that the [current_begin, current_end) was previously
1546 found to be not readable as a whole.
1548 Note loop condition -- if the range has 1 byte, we can't divide the range
1549 so there's no point trying further. */
1550 while (current_end
- current_begin
> 1)
1552 ULONGEST first_half_begin
, first_half_end
;
1553 ULONGEST second_half_begin
, second_half_end
;
1555 ULONGEST middle
= current_begin
+ (current_end
- current_begin
)/2;
1559 first_half_begin
= current_begin
;
1560 first_half_end
= middle
;
1561 second_half_begin
= middle
;
1562 second_half_end
= current_end
;
1566 first_half_begin
= middle
;
1567 first_half_end
= current_end
;
1568 second_half_begin
= current_begin
;
1569 second_half_end
= middle
;
1572 xfer
= target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1573 buf
+ (first_half_begin
- begin
),
1575 first_half_end
- first_half_begin
);
1577 if (xfer
== first_half_end
- first_half_begin
)
1579 /* This half reads up fine. So, the error must be in the
1581 current_begin
= second_half_begin
;
1582 current_end
= second_half_end
;
1586 /* This half is not readable. Because we've tried one byte, we
1587 know some part of this half if actually redable. Go to the next
1588 iteration to divide again and try to read.
1590 We don't handle the other half, because this function only tries
1591 to read a single readable subrange. */
1592 current_begin
= first_half_begin
;
1593 current_end
= first_half_end
;
1599 /* The [begin, current_begin) range has been read. */
1601 r
.end
= current_begin
;
1606 /* The [current_end, end) range has been read. */
1607 LONGEST rlen
= end
- current_end
;
1609 r
.data
= xmalloc (rlen
);
1610 memcpy (r
.data
, buf
+ current_end
- begin
, rlen
);
1611 r
.begin
= current_end
;
1615 VEC_safe_push(memory_read_result_s
, (*result
), &r
);
1619 free_memory_read_result_vector (void *x
)
1621 VEC(memory_read_result_s
) *v
= x
;
1622 memory_read_result_s
*current
;
1625 for (ix
= 0; VEC_iterate (memory_read_result_s
, v
, ix
, current
); ++ix
)
1627 xfree (current
->data
);
1629 VEC_free (memory_read_result_s
, v
);
1632 VEC(memory_read_result_s
) *
1633 read_memory_robust (struct target_ops
*ops
, ULONGEST offset
, LONGEST len
)
1635 VEC(memory_read_result_s
) *result
= 0;
1638 while (xfered
< len
)
1640 struct mem_region
*region
= lookup_mem_region (offset
+ xfered
);
1643 /* If there is no explicit region, a fake one should be created. */
1644 gdb_assert (region
);
1646 if (region
->hi
== 0)
1647 rlen
= len
- xfered
;
1649 rlen
= region
->hi
- offset
;
1651 if (region
->attrib
.mode
== MEM_NONE
|| region
->attrib
.mode
== MEM_WO
)
1653 /* Cannot read this region. Note that we can end up here only
1654 if the region is explicitly marked inaccessible, or
1655 'inaccessible-by-default' is in effect. */
1660 LONGEST to_read
= min (len
- xfered
, rlen
);
1661 gdb_byte
*buffer
= (gdb_byte
*)xmalloc (to_read
);
1663 LONGEST xfer
= target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1664 (gdb_byte
*) buffer
,
1665 offset
+ xfered
, to_read
);
1666 /* Call an observer, notifying them of the xfer progress? */
1669 /* Got an error reading full chunk. See if maybe we can read
1672 read_whatever_is_readable (ops
, offset
+ xfered
,
1673 offset
+ xfered
+ to_read
, &result
);
1678 struct memory_read_result r
;
1680 r
.begin
= offset
+ xfered
;
1681 r
.end
= r
.begin
+ xfer
;
1682 VEC_safe_push (memory_read_result_s
, result
, &r
);
1692 /* An alternative to target_write with progress callbacks. */
1695 target_write_with_progress (struct target_ops
*ops
,
1696 enum target_object object
,
1697 const char *annex
, const gdb_byte
*buf
,
1698 ULONGEST offset
, LONGEST len
,
1699 void (*progress
) (ULONGEST
, void *), void *baton
)
1703 /* Give the progress callback a chance to set up. */
1705 (*progress
) (0, baton
);
1707 while (xfered
< len
)
1709 ULONGEST xfered_len
;
1710 enum target_xfer_status status
;
1712 status
= target_write_partial (ops
, object
, annex
,
1713 (gdb_byte
*) buf
+ xfered
,
1714 offset
+ xfered
, len
- xfered
,
1717 if (status
!= TARGET_XFER_OK
)
1718 return status
== TARGET_XFER_EOF
? xfered
: -1;
1721 (*progress
) (xfered_len
, baton
);
1723 xfered
+= xfered_len
;
1729 /* For docs on target_write see target.h. */
1732 target_write (struct target_ops
*ops
,
1733 enum target_object object
,
1734 const char *annex
, const gdb_byte
*buf
,
1735 ULONGEST offset
, LONGEST len
)
1737 return target_write_with_progress (ops
, object
, annex
, buf
, offset
, len
,
1741 /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return
1742 the size of the transferred data. PADDING additional bytes are
1743 available in *BUF_P. This is a helper function for
1744 target_read_alloc; see the declaration of that function for more
1748 target_read_alloc_1 (struct target_ops
*ops
, enum target_object object
,
1749 const char *annex
, gdb_byte
**buf_p
, int padding
)
1751 size_t buf_alloc
, buf_pos
;
1754 /* This function does not have a length parameter; it reads the
1755 entire OBJECT). Also, it doesn't support objects fetched partly
1756 from one target and partly from another (in a different stratum,
1757 e.g. a core file and an executable). Both reasons make it
1758 unsuitable for reading memory. */
1759 gdb_assert (object
!= TARGET_OBJECT_MEMORY
);
1761 /* Start by reading up to 4K at a time. The target will throttle
1762 this number down if necessary. */
1764 buf
= xmalloc (buf_alloc
);
1768 ULONGEST xfered_len
;
1769 enum target_xfer_status status
;
1771 status
= target_read_partial (ops
, object
, annex
, &buf
[buf_pos
],
1772 buf_pos
, buf_alloc
- buf_pos
- padding
,
1775 if (status
== TARGET_XFER_EOF
)
1777 /* Read all there was. */
1784 else if (status
!= TARGET_XFER_OK
)
1786 /* An error occurred. */
1788 return TARGET_XFER_E_IO
;
1791 buf_pos
+= xfered_len
;
1793 /* If the buffer is filling up, expand it. */
1794 if (buf_alloc
< buf_pos
* 2)
1797 buf
= xrealloc (buf
, buf_alloc
);
1804 /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return
1805 the size of the transferred data. See the declaration in "target.h"
1806 function for more information about the return value. */
1809 target_read_alloc (struct target_ops
*ops
, enum target_object object
,
1810 const char *annex
, gdb_byte
**buf_p
)
1812 return target_read_alloc_1 (ops
, object
, annex
, buf_p
, 0);
1815 /* Read OBJECT/ANNEX using OPS. The result is NUL-terminated and
1816 returned as a string, allocated using xmalloc. If an error occurs
1817 or the transfer is unsupported, NULL is returned. Empty objects
1818 are returned as allocated but empty strings. A warning is issued
1819 if the result contains any embedded NUL bytes. */
1822 target_read_stralloc (struct target_ops
*ops
, enum target_object object
,
1827 LONGEST i
, transferred
;
1829 transferred
= target_read_alloc_1 (ops
, object
, annex
, &buffer
, 1);
1830 bufstr
= (char *) buffer
;
1832 if (transferred
< 0)
1835 if (transferred
== 0)
1836 return xstrdup ("");
1838 bufstr
[transferred
] = 0;
1840 /* Check for embedded NUL bytes; but allow trailing NULs. */
1841 for (i
= strlen (bufstr
); i
< transferred
; i
++)
1844 warning (_("target object %d, annex %s, "
1845 "contained unexpected null characters"),
1846 (int) object
, annex
? annex
: "(none)");
1853 /* Memory transfer methods. */
1856 get_target_memory (struct target_ops
*ops
, CORE_ADDR addr
, gdb_byte
*buf
,
1859 /* This method is used to read from an alternate, non-current
1860 target. This read must bypass the overlay support (as symbols
1861 don't match this target), and GDB's internal cache (wrong cache
1862 for this target). */
1863 if (target_read (ops
, TARGET_OBJECT_RAW_MEMORY
, NULL
, buf
, addr
, len
)
1865 memory_error (TARGET_XFER_E_IO
, addr
);
1869 get_target_memory_unsigned (struct target_ops
*ops
, CORE_ADDR addr
,
1870 int len
, enum bfd_endian byte_order
)
1872 gdb_byte buf
[sizeof (ULONGEST
)];
1874 gdb_assert (len
<= sizeof (buf
));
1875 get_target_memory (ops
, addr
, buf
, len
);
1876 return extract_unsigned_integer (buf
, len
, byte_order
);
1882 target_insert_breakpoint (struct gdbarch
*gdbarch
,
1883 struct bp_target_info
*bp_tgt
)
1885 if (!may_insert_breakpoints
)
1887 warning (_("May not insert breakpoints"));
1891 return current_target
.to_insert_breakpoint (¤t_target
,
1898 target_remove_breakpoint (struct gdbarch
*gdbarch
,
1899 struct bp_target_info
*bp_tgt
)
1901 /* This is kind of a weird case to handle, but the permission might
1902 have been changed after breakpoints were inserted - in which case
1903 we should just take the user literally and assume that any
1904 breakpoints should be left in place. */
1905 if (!may_insert_breakpoints
)
1907 warning (_("May not remove breakpoints"));
1911 return current_target
.to_remove_breakpoint (¤t_target
,
1916 target_info (char *args
, int from_tty
)
1918 struct target_ops
*t
;
1919 int has_all_mem
= 0;
1921 if (symfile_objfile
!= NULL
)
1922 printf_unfiltered (_("Symbols from \"%s\".\n"),
1923 objfile_name (symfile_objfile
));
1925 for (t
= target_stack
; t
!= NULL
; t
= t
->beneath
)
1927 if (!(*t
->to_has_memory
) (t
))
1930 if ((int) (t
->to_stratum
) <= (int) dummy_stratum
)
1933 printf_unfiltered (_("\tWhile running this, "
1934 "GDB does not access memory from...\n"));
1935 printf_unfiltered ("%s:\n", t
->to_longname
);
1936 (t
->to_files_info
) (t
);
1937 has_all_mem
= (*t
->to_has_all_memory
) (t
);
1941 /* This function is called before any new inferior is created, e.g.
1942 by running a program, attaching, or connecting to a target.
1943 It cleans up any state from previous invocations which might
1944 change between runs. This is a subset of what target_preopen
1945 resets (things which might change between targets). */
1948 target_pre_inferior (int from_tty
)
1950 /* Clear out solib state. Otherwise the solib state of the previous
1951 inferior might have survived and is entirely wrong for the new
1952 target. This has been observed on GNU/Linux using glibc 2.3. How
1964 Cannot access memory at address 0xdeadbeef
1967 /* In some OSs, the shared library list is the same/global/shared
1968 across inferiors. If code is shared between processes, so are
1969 memory regions and features. */
1970 if (!gdbarch_has_global_solist (target_gdbarch ()))
1972 no_shared_libraries (NULL
, from_tty
);
1974 invalidate_target_mem_regions ();
1976 target_clear_description ();
1979 agent_capability_invalidate ();
1982 /* Callback for iterate_over_inferiors. Gets rid of the given
1986 dispose_inferior (struct inferior
*inf
, void *args
)
1988 struct thread_info
*thread
;
1990 thread
= any_thread_of_process (inf
->pid
);
1993 switch_to_thread (thread
->ptid
);
1995 /* Core inferiors actually should be detached, not killed. */
1996 if (target_has_execution
)
1999 target_detach (NULL
, 0);
2005 /* This is to be called by the open routine before it does
2009 target_preopen (int from_tty
)
2013 if (have_inferiors ())
2016 || !have_live_inferiors ()
2017 || query (_("A program is being debugged already. Kill it? ")))
2018 iterate_over_inferiors (dispose_inferior
, NULL
);
2020 error (_("Program not killed."));
2023 /* Calling target_kill may remove the target from the stack. But if
2024 it doesn't (which seems like a win for UDI), remove it now. */
2025 /* Leave the exec target, though. The user may be switching from a
2026 live process to a core of the same program. */
2027 pop_all_targets_above (file_stratum
);
2029 target_pre_inferior (from_tty
);
2032 /* Detach a target after doing deferred register stores. */
2035 target_detach (const char *args
, int from_tty
)
2037 struct target_ops
* t
;
2039 if (gdbarch_has_global_breakpoints (target_gdbarch ()))
2040 /* Don't remove global breakpoints here. They're removed on
2041 disconnection from the target. */
2044 /* If we're in breakpoints-always-inserted mode, have to remove
2045 them before detaching. */
2046 remove_breakpoints_pid (ptid_get_pid (inferior_ptid
));
2048 prepare_for_detach ();
2050 current_target
.to_detach (¤t_target
, args
, from_tty
);
2054 target_disconnect (const char *args
, int from_tty
)
2056 /* If we're in breakpoints-always-inserted mode or if breakpoints
2057 are global across processes, we have to remove them before
2059 remove_breakpoints ();
2061 current_target
.to_disconnect (¤t_target
, args
, from_tty
);
2065 target_wait (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
2067 return (current_target
.to_wait
) (¤t_target
, ptid
, status
, options
);
2071 target_pid_to_str (ptid_t ptid
)
2073 return (*current_target
.to_pid_to_str
) (¤t_target
, ptid
);
2077 target_thread_name (struct thread_info
*info
)
2079 return current_target
.to_thread_name (¤t_target
, info
);
2083 target_resume (ptid_t ptid
, int step
, enum gdb_signal signal
)
2085 struct target_ops
*t
;
2087 target_dcache_invalidate ();
2089 current_target
.to_resume (¤t_target
, ptid
, step
, signal
);
2091 registers_changed_ptid (ptid
);
2092 /* We only set the internal executing state here. The user/frontend
2093 running state is set at a higher level. */
2094 set_executing (ptid
, 1);
2095 clear_inline_frame_state (ptid
);
2099 target_pass_signals (int numsigs
, unsigned char *pass_signals
)
2101 (*current_target
.to_pass_signals
) (¤t_target
, numsigs
, pass_signals
);
2105 target_program_signals (int numsigs
, unsigned char *program_signals
)
2107 (*current_target
.to_program_signals
) (¤t_target
,
2108 numsigs
, program_signals
);
2112 default_follow_fork (struct target_ops
*self
, int follow_child
,
2115 /* Some target returned a fork event, but did not know how to follow it. */
2116 internal_error (__FILE__
, __LINE__
,
2117 _("could not find a target to follow fork"));
2120 /* Look through the list of possible targets for a target that can
2124 target_follow_fork (int follow_child
, int detach_fork
)
2126 return current_target
.to_follow_fork (¤t_target
,
2127 follow_child
, detach_fork
);
2131 default_mourn_inferior (struct target_ops
*self
)
2133 internal_error (__FILE__
, __LINE__
,
2134 _("could not find a target to follow mourn inferior"));
2138 target_mourn_inferior (void)
2140 current_target
.to_mourn_inferior (¤t_target
);
2142 /* We no longer need to keep handles on any of the object files.
2143 Make sure to release them to avoid unnecessarily locking any
2144 of them while we're not actually debugging. */
2145 bfd_cache_close_all ();
2148 /* Look for a target which can describe architectural features, starting
2149 from TARGET. If we find one, return its description. */
2151 const struct target_desc
*
2152 target_read_description (struct target_ops
*target
)
2154 return target
->to_read_description (target
);
2157 /* This implements a basic search of memory, reading target memory and
2158 performing the search here (as opposed to performing the search in on the
2159 target side with, for example, gdbserver). */
2162 simple_search_memory (struct target_ops
*ops
,
2163 CORE_ADDR start_addr
, ULONGEST search_space_len
,
2164 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2165 CORE_ADDR
*found_addrp
)
2167 /* NOTE: also defined in find.c testcase. */
2168 #define SEARCH_CHUNK_SIZE 16000
2169 const unsigned chunk_size
= SEARCH_CHUNK_SIZE
;
2170 /* Buffer to hold memory contents for searching. */
2171 gdb_byte
*search_buf
;
2172 unsigned search_buf_size
;
2173 struct cleanup
*old_cleanups
;
2175 search_buf_size
= chunk_size
+ pattern_len
- 1;
2177 /* No point in trying to allocate a buffer larger than the search space. */
2178 if (search_space_len
< search_buf_size
)
2179 search_buf_size
= search_space_len
;
2181 search_buf
= malloc (search_buf_size
);
2182 if (search_buf
== NULL
)
2183 error (_("Unable to allocate memory to perform the search."));
2184 old_cleanups
= make_cleanup (free_current_contents
, &search_buf
);
2186 /* Prime the search buffer. */
2188 if (target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2189 search_buf
, start_addr
, search_buf_size
) != search_buf_size
)
2191 warning (_("Unable to access %s bytes of target "
2192 "memory at %s, halting search."),
2193 pulongest (search_buf_size
), hex_string (start_addr
));
2194 do_cleanups (old_cleanups
);
2198 /* Perform the search.
2200 The loop is kept simple by allocating [N + pattern-length - 1] bytes.
2201 When we've scanned N bytes we copy the trailing bytes to the start and
2202 read in another N bytes. */
2204 while (search_space_len
>= pattern_len
)
2206 gdb_byte
*found_ptr
;
2207 unsigned nr_search_bytes
= min (search_space_len
, search_buf_size
);
2209 found_ptr
= memmem (search_buf
, nr_search_bytes
,
2210 pattern
, pattern_len
);
2212 if (found_ptr
!= NULL
)
2214 CORE_ADDR found_addr
= start_addr
+ (found_ptr
- search_buf
);
2216 *found_addrp
= found_addr
;
2217 do_cleanups (old_cleanups
);
2221 /* Not found in this chunk, skip to next chunk. */
2223 /* Don't let search_space_len wrap here, it's unsigned. */
2224 if (search_space_len
>= chunk_size
)
2225 search_space_len
-= chunk_size
;
2227 search_space_len
= 0;
2229 if (search_space_len
>= pattern_len
)
2231 unsigned keep_len
= search_buf_size
- chunk_size
;
2232 CORE_ADDR read_addr
= start_addr
+ chunk_size
+ keep_len
;
2235 /* Copy the trailing part of the previous iteration to the front
2236 of the buffer for the next iteration. */
2237 gdb_assert (keep_len
== pattern_len
- 1);
2238 memcpy (search_buf
, search_buf
+ chunk_size
, keep_len
);
2240 nr_to_read
= min (search_space_len
- keep_len
, chunk_size
);
2242 if (target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2243 search_buf
+ keep_len
, read_addr
,
2244 nr_to_read
) != nr_to_read
)
2246 warning (_("Unable to access %s bytes of target "
2247 "memory at %s, halting search."),
2248 plongest (nr_to_read
),
2249 hex_string (read_addr
));
2250 do_cleanups (old_cleanups
);
2254 start_addr
+= chunk_size
;
2260 do_cleanups (old_cleanups
);
2264 /* Default implementation of memory-searching. */
2267 default_search_memory (struct target_ops
*self
,
2268 CORE_ADDR start_addr
, ULONGEST search_space_len
,
2269 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2270 CORE_ADDR
*found_addrp
)
2272 /* Start over from the top of the target stack. */
2273 return simple_search_memory (current_target
.beneath
,
2274 start_addr
, search_space_len
,
2275 pattern
, pattern_len
, found_addrp
);
2278 /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the
2279 sequence of bytes in PATTERN with length PATTERN_LEN.
2281 The result is 1 if found, 0 if not found, and -1 if there was an error
2282 requiring halting of the search (e.g. memory read error).
2283 If the pattern is found the address is recorded in FOUND_ADDRP. */
2286 target_search_memory (CORE_ADDR start_addr
, ULONGEST search_space_len
,
2287 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2288 CORE_ADDR
*found_addrp
)
2290 return current_target
.to_search_memory (¤t_target
, start_addr
,
2292 pattern
, pattern_len
, found_addrp
);
2295 /* Look through the currently pushed targets. If none of them will
2296 be able to restart the currently running process, issue an error
2300 target_require_runnable (void)
2302 struct target_ops
*t
;
2304 for (t
= target_stack
; t
!= NULL
; t
= t
->beneath
)
2306 /* If this target knows how to create a new program, then
2307 assume we will still be able to after killing the current
2308 one. Either killing and mourning will not pop T, or else
2309 find_default_run_target will find it again. */
2310 if (t
->to_create_inferior
!= NULL
)
2313 /* Do not worry about targets at certain strata that can not
2314 create inferiors. Assume they will be pushed again if
2315 necessary, and continue to the process_stratum. */
2316 if (t
->to_stratum
== thread_stratum
2317 || t
->to_stratum
== record_stratum
2318 || t
->to_stratum
== arch_stratum
)
2321 error (_("The \"%s\" target does not support \"run\". "
2322 "Try \"help target\" or \"continue\"."),
2326 /* This function is only called if the target is running. In that
2327 case there should have been a process_stratum target and it
2328 should either know how to create inferiors, or not... */
2329 internal_error (__FILE__
, __LINE__
, _("No targets found"));
2332 /* Whether GDB is allowed to fall back to the default run target for
2333 "run", "attach", etc. when no target is connected yet. */
2334 static int auto_connect_native_target
= 1;
2337 show_auto_connect_native_target (struct ui_file
*file
, int from_tty
,
2338 struct cmd_list_element
*c
, const char *value
)
2340 fprintf_filtered (file
,
2341 _("Whether GDB may automatically connect to the "
2342 "native target is %s.\n"),
2346 /* Look through the list of possible targets for a target that can
2347 execute a run or attach command without any other data. This is
2348 used to locate the default process stratum.
2350 If DO_MESG is not NULL, the result is always valid (error() is
2351 called for errors); else, return NULL on error. */
2353 static struct target_ops
*
2354 find_default_run_target (char *do_mesg
)
2356 struct target_ops
*runable
= NULL
;
2358 if (auto_connect_native_target
)
2360 struct target_ops
**t
;
2363 for (t
= target_structs
; t
< target_structs
+ target_struct_size
;
2366 if ((*t
)->to_can_run
!= delegate_can_run
&& target_can_run (*t
))
2377 if (runable
== NULL
)
2380 error (_("Don't know how to %s. Try \"help target\"."), do_mesg
);
2391 find_attach_target (void)
2393 struct target_ops
*t
;
2395 /* If a target on the current stack can attach, use it. */
2396 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2398 if (t
->to_attach
!= NULL
)
2402 /* Otherwise, use the default run target for attaching. */
2404 t
= find_default_run_target ("attach");
2412 find_run_target (void)
2414 struct target_ops
*t
;
2416 /* If a target on the current stack can attach, use it. */
2417 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2419 if (t
->to_create_inferior
!= NULL
)
2423 /* Otherwise, use the default run target. */
2425 t
= find_default_run_target ("run");
2430 /* Implement the "info proc" command. */
2433 target_info_proc (const char *args
, enum info_proc_what what
)
2435 struct target_ops
*t
;
2437 /* If we're already connected to something that can get us OS
2438 related data, use it. Otherwise, try using the native
2440 if (current_target
.to_stratum
>= process_stratum
)
2441 t
= current_target
.beneath
;
2443 t
= find_default_run_target (NULL
);
2445 for (; t
!= NULL
; t
= t
->beneath
)
2447 if (t
->to_info_proc
!= NULL
)
2449 t
->to_info_proc (t
, args
, what
);
2452 fprintf_unfiltered (gdb_stdlog
,
2453 "target_info_proc (\"%s\", %d)\n", args
, what
);
2463 find_default_supports_disable_randomization (struct target_ops
*self
)
2465 struct target_ops
*t
;
2467 t
= find_default_run_target (NULL
);
2468 if (t
&& t
->to_supports_disable_randomization
)
2469 return (t
->to_supports_disable_randomization
) (t
);
2474 target_supports_disable_randomization (void)
2476 struct target_ops
*t
;
2478 for (t
= ¤t_target
; t
!= NULL
; t
= t
->beneath
)
2479 if (t
->to_supports_disable_randomization
)
2480 return t
->to_supports_disable_randomization (t
);
2486 target_get_osdata (const char *type
)
2488 struct target_ops
*t
;
2490 /* If we're already connected to something that can get us OS
2491 related data, use it. Otherwise, try using the native
2493 if (current_target
.to_stratum
>= process_stratum
)
2494 t
= current_target
.beneath
;
2496 t
= find_default_run_target ("get OS data");
2501 return target_read_stralloc (t
, TARGET_OBJECT_OSDATA
, type
);
2504 static struct address_space
*
2505 default_thread_address_space (struct target_ops
*self
, ptid_t ptid
)
2507 struct inferior
*inf
;
2509 /* Fall-back to the "main" address space of the inferior. */
2510 inf
= find_inferior_pid (ptid_get_pid (ptid
));
2512 if (inf
== NULL
|| inf
->aspace
== NULL
)
2513 internal_error (__FILE__
, __LINE__
,
2514 _("Can't determine the current "
2515 "address space of thread %s\n"),
2516 target_pid_to_str (ptid
));
2521 /* Determine the current address space of thread PTID. */
2523 struct address_space
*
2524 target_thread_address_space (ptid_t ptid
)
2526 struct address_space
*aspace
;
2528 aspace
= current_target
.to_thread_address_space (¤t_target
, ptid
);
2529 gdb_assert (aspace
!= NULL
);
2535 /* Target file operations. */
2537 static struct target_ops
*
2538 default_fileio_target (void)
2540 /* If we're already connected to something that can perform
2541 file I/O, use it. Otherwise, try using the native target. */
2542 if (current_target
.to_stratum
>= process_stratum
)
2543 return current_target
.beneath
;
2545 return find_default_run_target ("file I/O");
2548 /* Open FILENAME on the target, using FLAGS and MODE. Return a
2549 target file descriptor, or -1 if an error occurs (and set
2552 target_fileio_open (const char *filename
, int flags
, int mode
,
2555 struct target_ops
*t
;
2557 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
2559 if (t
->to_fileio_open
!= NULL
)
2561 int fd
= t
->to_fileio_open (t
, filename
, flags
, mode
, target_errno
);
2564 fprintf_unfiltered (gdb_stdlog
,
2565 "target_fileio_open (%s,0x%x,0%o) = %d (%d)\n",
2566 filename
, flags
, mode
,
2567 fd
, fd
!= -1 ? 0 : *target_errno
);
2572 *target_errno
= FILEIO_ENOSYS
;
2576 /* Write up to LEN bytes from WRITE_BUF to FD on the target.
2577 Return the number of bytes written, or -1 if an error occurs
2578 (and set *TARGET_ERRNO). */
2580 target_fileio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
2581 ULONGEST offset
, int *target_errno
)
2583 struct target_ops
*t
;
2585 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
2587 if (t
->to_fileio_pwrite
!= NULL
)
2589 int ret
= t
->to_fileio_pwrite (t
, fd
, write_buf
, len
, offset
,
2593 fprintf_unfiltered (gdb_stdlog
,
2594 "target_fileio_pwrite (%d,...,%d,%s) "
2596 fd
, len
, pulongest (offset
),
2597 ret
, ret
!= -1 ? 0 : *target_errno
);
2602 *target_errno
= FILEIO_ENOSYS
;
2606 /* Read up to LEN bytes FD on the target into READ_BUF.
2607 Return the number of bytes read, or -1 if an error occurs
2608 (and set *TARGET_ERRNO). */
2610 target_fileio_pread (int fd
, gdb_byte
*read_buf
, int len
,
2611 ULONGEST offset
, int *target_errno
)
2613 struct target_ops
*t
;
2615 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
2617 if (t
->to_fileio_pread
!= NULL
)
2619 int ret
= t
->to_fileio_pread (t
, fd
, read_buf
, len
, offset
,
2623 fprintf_unfiltered (gdb_stdlog
,
2624 "target_fileio_pread (%d,...,%d,%s) "
2626 fd
, len
, pulongest (offset
),
2627 ret
, ret
!= -1 ? 0 : *target_errno
);
2632 *target_errno
= FILEIO_ENOSYS
;
2636 /* Close FD on the target. Return 0, or -1 if an error occurs
2637 (and set *TARGET_ERRNO). */
2639 target_fileio_close (int fd
, int *target_errno
)
2641 struct target_ops
*t
;
2643 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
2645 if (t
->to_fileio_close
!= NULL
)
2647 int ret
= t
->to_fileio_close (t
, fd
, target_errno
);
2650 fprintf_unfiltered (gdb_stdlog
,
2651 "target_fileio_close (%d) = %d (%d)\n",
2652 fd
, ret
, ret
!= -1 ? 0 : *target_errno
);
2657 *target_errno
= FILEIO_ENOSYS
;
2661 /* Unlink FILENAME on the target. Return 0, or -1 if an error
2662 occurs (and set *TARGET_ERRNO). */
2664 target_fileio_unlink (const char *filename
, int *target_errno
)
2666 struct target_ops
*t
;
2668 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
2670 if (t
->to_fileio_unlink
!= NULL
)
2672 int ret
= t
->to_fileio_unlink (t
, filename
, target_errno
);
2675 fprintf_unfiltered (gdb_stdlog
,
2676 "target_fileio_unlink (%s) = %d (%d)\n",
2677 filename
, ret
, ret
!= -1 ? 0 : *target_errno
);
2682 *target_errno
= FILEIO_ENOSYS
;
2686 /* Read value of symbolic link FILENAME on the target. Return a
2687 null-terminated string allocated via xmalloc, or NULL if an error
2688 occurs (and set *TARGET_ERRNO). */
2690 target_fileio_readlink (const char *filename
, int *target_errno
)
2692 struct target_ops
*t
;
2694 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
2696 if (t
->to_fileio_readlink
!= NULL
)
2698 char *ret
= t
->to_fileio_readlink (t
, filename
, target_errno
);
2701 fprintf_unfiltered (gdb_stdlog
,
2702 "target_fileio_readlink (%s) = %s (%d)\n",
2703 filename
, ret
? ret
: "(nil)",
2704 ret
? 0 : *target_errno
);
2709 *target_errno
= FILEIO_ENOSYS
;
2714 target_fileio_close_cleanup (void *opaque
)
2716 int fd
= *(int *) opaque
;
2719 target_fileio_close (fd
, &target_errno
);
2722 /* Read target file FILENAME. Store the result in *BUF_P and
2723 return the size of the transferred data. PADDING additional bytes are
2724 available in *BUF_P. This is a helper function for
2725 target_fileio_read_alloc; see the declaration of that function for more
2729 target_fileio_read_alloc_1 (const char *filename
,
2730 gdb_byte
**buf_p
, int padding
)
2732 struct cleanup
*close_cleanup
;
2733 size_t buf_alloc
, buf_pos
;
2739 fd
= target_fileio_open (filename
, FILEIO_O_RDONLY
, 0700, &target_errno
);
2743 close_cleanup
= make_cleanup (target_fileio_close_cleanup
, &fd
);
2745 /* Start by reading up to 4K at a time. The target will throttle
2746 this number down if necessary. */
2748 buf
= xmalloc (buf_alloc
);
2752 n
= target_fileio_pread (fd
, &buf
[buf_pos
],
2753 buf_alloc
- buf_pos
- padding
, buf_pos
,
2757 /* An error occurred. */
2758 do_cleanups (close_cleanup
);
2764 /* Read all there was. */
2765 do_cleanups (close_cleanup
);
2775 /* If the buffer is filling up, expand it. */
2776 if (buf_alloc
< buf_pos
* 2)
2779 buf
= xrealloc (buf
, buf_alloc
);
2786 /* Read target file FILENAME. Store the result in *BUF_P and return
2787 the size of the transferred data. See the declaration in "target.h"
2788 function for more information about the return value. */
2791 target_fileio_read_alloc (const char *filename
, gdb_byte
**buf_p
)
2793 return target_fileio_read_alloc_1 (filename
, buf_p
, 0);
2796 /* Read target file FILENAME. The result is NUL-terminated and
2797 returned as a string, allocated using xmalloc. If an error occurs
2798 or the transfer is unsupported, NULL is returned. Empty objects
2799 are returned as allocated but empty strings. A warning is issued
2800 if the result contains any embedded NUL bytes. */
2803 target_fileio_read_stralloc (const char *filename
)
2807 LONGEST i
, transferred
;
2809 transferred
= target_fileio_read_alloc_1 (filename
, &buffer
, 1);
2810 bufstr
= (char *) buffer
;
2812 if (transferred
< 0)
2815 if (transferred
== 0)
2816 return xstrdup ("");
2818 bufstr
[transferred
] = 0;
2820 /* Check for embedded NUL bytes; but allow trailing NULs. */
2821 for (i
= strlen (bufstr
); i
< transferred
; i
++)
2824 warning (_("target file %s "
2825 "contained unexpected null characters"),
2835 default_region_ok_for_hw_watchpoint (struct target_ops
*self
,
2836 CORE_ADDR addr
, int len
)
2838 return (len
<= gdbarch_ptr_bit (target_gdbarch ()) / TARGET_CHAR_BIT
);
2842 default_watchpoint_addr_within_range (struct target_ops
*target
,
2844 CORE_ADDR start
, int length
)
2846 return addr
>= start
&& addr
< start
+ length
;
2849 static struct gdbarch
*
2850 default_thread_architecture (struct target_ops
*ops
, ptid_t ptid
)
2852 return target_gdbarch ();
2856 return_zero (struct target_ops
*ignore
)
2862 return_zero_has_execution (struct target_ops
*ignore
, ptid_t ignore2
)
2868 * Find the next target down the stack from the specified target.
2872 find_target_beneath (struct target_ops
*t
)
2880 find_target_at (enum strata stratum
)
2882 struct target_ops
*t
;
2884 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2885 if (t
->to_stratum
== stratum
)
2892 /* The inferior process has died. Long live the inferior! */
2895 generic_mourn_inferior (void)
2899 ptid
= inferior_ptid
;
2900 inferior_ptid
= null_ptid
;
2902 /* Mark breakpoints uninserted in case something tries to delete a
2903 breakpoint while we delete the inferior's threads (which would
2904 fail, since the inferior is long gone). */
2905 mark_breakpoints_out ();
2907 if (!ptid_equal (ptid
, null_ptid
))
2909 int pid
= ptid_get_pid (ptid
);
2910 exit_inferior (pid
);
2913 /* Note this wipes step-resume breakpoints, so needs to be done
2914 after exit_inferior, which ends up referencing the step-resume
2915 breakpoints through clear_thread_inferior_resources. */
2916 breakpoint_init_inferior (inf_exited
);
2918 registers_changed ();
2920 reopen_exec_file ();
2921 reinit_frame_cache ();
2923 if (deprecated_detach_hook
)
2924 deprecated_detach_hook ();
2927 /* Convert a normal process ID to a string. Returns the string in a
2931 normal_pid_to_str (ptid_t ptid
)
2933 static char buf
[32];
2935 xsnprintf (buf
, sizeof buf
, "process %d", ptid_get_pid (ptid
));
2940 default_pid_to_str (struct target_ops
*ops
, ptid_t ptid
)
2942 return normal_pid_to_str (ptid
);
2945 /* Error-catcher for target_find_memory_regions. */
2947 dummy_find_memory_regions (struct target_ops
*self
,
2948 find_memory_region_ftype ignore1
, void *ignore2
)
2950 error (_("Command not implemented for this target."));
2954 /* Error-catcher for target_make_corefile_notes. */
2956 dummy_make_corefile_notes (struct target_ops
*self
,
2957 bfd
*ignore1
, int *ignore2
)
2959 error (_("Command not implemented for this target."));
2963 /* Set up the handful of non-empty slots needed by the dummy target
2967 init_dummy_target (void)
2969 dummy_target
.to_shortname
= "None";
2970 dummy_target
.to_longname
= "None";
2971 dummy_target
.to_doc
= "";
2972 dummy_target
.to_supports_disable_randomization
2973 = find_default_supports_disable_randomization
;
2974 dummy_target
.to_stratum
= dummy_stratum
;
2975 dummy_target
.to_has_all_memory
= return_zero
;
2976 dummy_target
.to_has_memory
= return_zero
;
2977 dummy_target
.to_has_stack
= return_zero
;
2978 dummy_target
.to_has_registers
= return_zero
;
2979 dummy_target
.to_has_execution
= return_zero_has_execution
;
2980 dummy_target
.to_magic
= OPS_MAGIC
;
2982 install_dummy_methods (&dummy_target
);
2987 target_close (struct target_ops
*targ
)
2989 gdb_assert (!target_is_pushed (targ
));
2991 if (targ
->to_xclose
!= NULL
)
2992 targ
->to_xclose (targ
);
2993 else if (targ
->to_close
!= NULL
)
2994 targ
->to_close (targ
);
2997 fprintf_unfiltered (gdb_stdlog
, "target_close ()\n");
3001 target_thread_alive (ptid_t ptid
)
3003 return current_target
.to_thread_alive (¤t_target
, ptid
);
3007 target_find_new_threads (void)
3009 current_target
.to_find_new_threads (¤t_target
);
3013 target_stop (ptid_t ptid
)
3017 warning (_("May not interrupt or stop the target, ignoring attempt"));
3021 (*current_target
.to_stop
) (¤t_target
, ptid
);
3024 /* Concatenate ELEM to LIST, a comma separate list, and return the
3025 result. The LIST incoming argument is released. */
3028 str_comma_list_concat_elem (char *list
, const char *elem
)
3031 return xstrdup (elem
);
3033 return reconcat (list
, list
, ", ", elem
, (char *) NULL
);
3036 /* Helper for target_options_to_string. If OPT is present in
3037 TARGET_OPTIONS, append the OPT_STR (string version of OPT) in RET.
3038 Returns the new resulting string. OPT is removed from
3042 do_option (int *target_options
, char *ret
,
3043 int opt
, char *opt_str
)
3045 if ((*target_options
& opt
) != 0)
3047 ret
= str_comma_list_concat_elem (ret
, opt_str
);
3048 *target_options
&= ~opt
;
3055 target_options_to_string (int target_options
)
3059 #define DO_TARG_OPTION(OPT) \
3060 ret = do_option (&target_options, ret, OPT, #OPT)
3062 DO_TARG_OPTION (TARGET_WNOHANG
);
3064 if (target_options
!= 0)
3065 ret
= str_comma_list_concat_elem (ret
, "unknown???");
3073 debug_print_register (const char * func
,
3074 struct regcache
*regcache
, int regno
)
3076 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
3078 fprintf_unfiltered (gdb_stdlog
, "%s ", func
);
3079 if (regno
>= 0 && regno
< gdbarch_num_regs (gdbarch
)
3080 && gdbarch_register_name (gdbarch
, regno
) != NULL
3081 && gdbarch_register_name (gdbarch
, regno
)[0] != '\0')
3082 fprintf_unfiltered (gdb_stdlog
, "(%s)",
3083 gdbarch_register_name (gdbarch
, regno
));
3085 fprintf_unfiltered (gdb_stdlog
, "(%d)", regno
);
3086 if (regno
>= 0 && regno
< gdbarch_num_regs (gdbarch
))
3088 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
3089 int i
, size
= register_size (gdbarch
, regno
);
3090 gdb_byte buf
[MAX_REGISTER_SIZE
];
3092 regcache_raw_collect (regcache
, regno
, buf
);
3093 fprintf_unfiltered (gdb_stdlog
, " = ");
3094 for (i
= 0; i
< size
; i
++)
3096 fprintf_unfiltered (gdb_stdlog
, "%02x", buf
[i
]);
3098 if (size
<= sizeof (LONGEST
))
3100 ULONGEST val
= extract_unsigned_integer (buf
, size
, byte_order
);
3102 fprintf_unfiltered (gdb_stdlog
, " %s %s",
3103 core_addr_to_string_nz (val
), plongest (val
));
3106 fprintf_unfiltered (gdb_stdlog
, "\n");
3110 target_fetch_registers (struct regcache
*regcache
, int regno
)
3112 current_target
.to_fetch_registers (¤t_target
, regcache
, regno
);
3114 debug_print_register ("target_fetch_registers", regcache
, regno
);
3118 target_store_registers (struct regcache
*regcache
, int regno
)
3120 struct target_ops
*t
;
3122 if (!may_write_registers
)
3123 error (_("Writing to registers is not allowed (regno %d)"), regno
);
3125 current_target
.to_store_registers (¤t_target
, regcache
, regno
);
3128 debug_print_register ("target_store_registers", regcache
, regno
);
3133 target_core_of_thread (ptid_t ptid
)
3135 return current_target
.to_core_of_thread (¤t_target
, ptid
);
3139 simple_verify_memory (struct target_ops
*ops
,
3140 const gdb_byte
*data
, CORE_ADDR lma
, ULONGEST size
)
3142 LONGEST total_xfered
= 0;
3144 while (total_xfered
< size
)
3146 ULONGEST xfered_len
;
3147 enum target_xfer_status status
;
3149 ULONGEST howmuch
= min (sizeof (buf
), size
- total_xfered
);
3151 status
= target_xfer_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
3152 buf
, NULL
, lma
+ total_xfered
, howmuch
,
3154 if (status
== TARGET_XFER_OK
3155 && memcmp (data
+ total_xfered
, buf
, xfered_len
) == 0)
3157 total_xfered
+= xfered_len
;
3166 /* Default implementation of memory verification. */
3169 default_verify_memory (struct target_ops
*self
,
3170 const gdb_byte
*data
, CORE_ADDR memaddr
, ULONGEST size
)
3172 /* Start over from the top of the target stack. */
3173 return simple_verify_memory (current_target
.beneath
,
3174 data
, memaddr
, size
);
3178 target_verify_memory (const gdb_byte
*data
, CORE_ADDR memaddr
, ULONGEST size
)
3180 return current_target
.to_verify_memory (¤t_target
,
3181 data
, memaddr
, size
);
3184 /* The documentation for this function is in its prototype declaration in
3188 target_insert_mask_watchpoint (CORE_ADDR addr
, CORE_ADDR mask
, int rw
)
3190 return current_target
.to_insert_mask_watchpoint (¤t_target
,
3194 /* The documentation for this function is in its prototype declaration in
3198 target_remove_mask_watchpoint (CORE_ADDR addr
, CORE_ADDR mask
, int rw
)
3200 return current_target
.to_remove_mask_watchpoint (¤t_target
,
3204 /* The documentation for this function is in its prototype declaration
3208 target_masked_watch_num_registers (CORE_ADDR addr
, CORE_ADDR mask
)
3210 return current_target
.to_masked_watch_num_registers (¤t_target
,
3214 /* The documentation for this function is in its prototype declaration
3218 target_ranged_break_num_registers (void)
3220 return current_target
.to_ranged_break_num_registers (¤t_target
);
3225 struct btrace_target_info
*
3226 target_enable_btrace (ptid_t ptid
)
3228 return current_target
.to_enable_btrace (¤t_target
, ptid
);
3234 target_disable_btrace (struct btrace_target_info
*btinfo
)
3236 current_target
.to_disable_btrace (¤t_target
, btinfo
);
3242 target_teardown_btrace (struct btrace_target_info
*btinfo
)
3244 current_target
.to_teardown_btrace (¤t_target
, btinfo
);
3250 target_read_btrace (VEC (btrace_block_s
) **btrace
,
3251 struct btrace_target_info
*btinfo
,
3252 enum btrace_read_type type
)
3254 return current_target
.to_read_btrace (¤t_target
, btrace
, btinfo
, type
);
3260 target_stop_recording (void)
3262 current_target
.to_stop_recording (¤t_target
);
3268 target_save_record (const char *filename
)
3270 current_target
.to_save_record (¤t_target
, filename
);
3276 target_supports_delete_record (void)
3278 struct target_ops
*t
;
3280 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3281 if (t
->to_delete_record
!= delegate_delete_record
3282 && t
->to_delete_record
!= tdefault_delete_record
)
3291 target_delete_record (void)
3293 current_target
.to_delete_record (¤t_target
);
3299 target_record_is_replaying (void)
3301 return current_target
.to_record_is_replaying (¤t_target
);
3307 target_goto_record_begin (void)
3309 current_target
.to_goto_record_begin (¤t_target
);
3315 target_goto_record_end (void)
3317 current_target
.to_goto_record_end (¤t_target
);
3323 target_goto_record (ULONGEST insn
)
3325 current_target
.to_goto_record (¤t_target
, insn
);
3331 target_insn_history (int size
, int flags
)
3333 current_target
.to_insn_history (¤t_target
, size
, flags
);
3339 target_insn_history_from (ULONGEST from
, int size
, int flags
)
3341 current_target
.to_insn_history_from (¤t_target
, from
, size
, flags
);
3347 target_insn_history_range (ULONGEST begin
, ULONGEST end
, int flags
)
3349 current_target
.to_insn_history_range (¤t_target
, begin
, end
, flags
);
3355 target_call_history (int size
, int flags
)
3357 current_target
.to_call_history (¤t_target
, size
, flags
);
3363 target_call_history_from (ULONGEST begin
, int size
, int flags
)
3365 current_target
.to_call_history_from (¤t_target
, begin
, size
, flags
);
3371 target_call_history_range (ULONGEST begin
, ULONGEST end
, int flags
)
3373 current_target
.to_call_history_range (¤t_target
, begin
, end
, flags
);
3378 const struct frame_unwind
*
3379 target_get_unwinder (void)
3381 return current_target
.to_get_unwinder (¤t_target
);
3386 const struct frame_unwind
*
3387 target_get_tailcall_unwinder (void)
3389 return current_target
.to_get_tailcall_unwinder (¤t_target
);
3392 /* Default implementation of to_decr_pc_after_break. */
3395 default_target_decr_pc_after_break (struct target_ops
*ops
,
3396 struct gdbarch
*gdbarch
)
3398 return gdbarch_decr_pc_after_break (gdbarch
);
3404 target_decr_pc_after_break (struct gdbarch
*gdbarch
)
3406 return current_target
.to_decr_pc_after_break (¤t_target
, gdbarch
);
3412 target_prepare_to_generate_core (void)
3414 current_target
.to_prepare_to_generate_core (¤t_target
);
3420 target_done_generating_core (void)
3422 current_target
.to_done_generating_core (¤t_target
);
3426 setup_target_debug (void)
3428 memcpy (&debug_target
, ¤t_target
, sizeof debug_target
);
3430 init_debug_target (¤t_target
);
3434 static char targ_desc
[] =
3435 "Names of targets and files being debugged.\nShows the entire \
3436 stack of targets currently in use (including the exec-file,\n\
3437 core-file, and process, if any), as well as the symbol file name.";
3440 default_rcmd (struct target_ops
*self
, const char *command
,
3441 struct ui_file
*output
)
3443 error (_("\"monitor\" command not supported by this target."));
3447 do_monitor_command (char *cmd
,
3450 target_rcmd (cmd
, gdb_stdtarg
);
3453 /* Print the name of each layers of our target stack. */
3456 maintenance_print_target_stack (char *cmd
, int from_tty
)
3458 struct target_ops
*t
;
3460 printf_filtered (_("The current target stack is:\n"));
3462 for (t
= target_stack
; t
!= NULL
; t
= t
->beneath
)
3464 printf_filtered (" - %s (%s)\n", t
->to_shortname
, t
->to_longname
);
3468 /* Controls if targets can report that they can/are async. This is
3469 just for maintainers to use when debugging gdb. */
3470 int target_async_permitted
= 1;
3472 /* The set command writes to this variable. If the inferior is
3473 executing, target_async_permitted is *not* updated. */
3474 static int target_async_permitted_1
= 1;
3477 maint_set_target_async_command (char *args
, int from_tty
,
3478 struct cmd_list_element
*c
)
3480 if (have_live_inferiors ())
3482 target_async_permitted_1
= target_async_permitted
;
3483 error (_("Cannot change this setting while the inferior is running."));
3486 target_async_permitted
= target_async_permitted_1
;
3490 maint_show_target_async_command (struct ui_file
*file
, int from_tty
,
3491 struct cmd_list_element
*c
,
3494 fprintf_filtered (file
,
3495 _("Controlling the inferior in "
3496 "asynchronous mode is %s.\n"), value
);
3499 /* Temporary copies of permission settings. */
3501 static int may_write_registers_1
= 1;
3502 static int may_write_memory_1
= 1;
3503 static int may_insert_breakpoints_1
= 1;
3504 static int may_insert_tracepoints_1
= 1;
3505 static int may_insert_fast_tracepoints_1
= 1;
3506 static int may_stop_1
= 1;
3508 /* Make the user-set values match the real values again. */
3511 update_target_permissions (void)
3513 may_write_registers_1
= may_write_registers
;
3514 may_write_memory_1
= may_write_memory
;
3515 may_insert_breakpoints_1
= may_insert_breakpoints
;
3516 may_insert_tracepoints_1
= may_insert_tracepoints
;
3517 may_insert_fast_tracepoints_1
= may_insert_fast_tracepoints
;
3518 may_stop_1
= may_stop
;
3521 /* The one function handles (most of) the permission flags in the same
3525 set_target_permissions (char *args
, int from_tty
,
3526 struct cmd_list_element
*c
)
3528 if (target_has_execution
)
3530 update_target_permissions ();
3531 error (_("Cannot change this setting while the inferior is running."));
3534 /* Make the real values match the user-changed values. */
3535 may_write_registers
= may_write_registers_1
;
3536 may_insert_breakpoints
= may_insert_breakpoints_1
;
3537 may_insert_tracepoints
= may_insert_tracepoints_1
;
3538 may_insert_fast_tracepoints
= may_insert_fast_tracepoints_1
;
3539 may_stop
= may_stop_1
;
3540 update_observer_mode ();
3543 /* Set memory write permission independently of observer mode. */
3546 set_write_memory_permission (char *args
, int from_tty
,
3547 struct cmd_list_element
*c
)
3549 /* Make the real values match the user-changed values. */
3550 may_write_memory
= may_write_memory_1
;
3551 update_observer_mode ();
3556 initialize_targets (void)
3558 init_dummy_target ();
3559 push_target (&dummy_target
);
3561 add_info ("target", target_info
, targ_desc
);
3562 add_info ("files", target_info
, targ_desc
);
3564 add_setshow_zuinteger_cmd ("target", class_maintenance
, &targetdebug
, _("\
3565 Set target debugging."), _("\
3566 Show target debugging."), _("\
3567 When non-zero, target debugging is enabled. Higher numbers are more\n\
3568 verbose. Changes do not take effect until the next \"run\" or \"target\"\n\
3572 &setdebuglist
, &showdebuglist
);
3574 add_setshow_boolean_cmd ("trust-readonly-sections", class_support
,
3575 &trust_readonly
, _("\
3576 Set mode for reading from readonly sections."), _("\
3577 Show mode for reading from readonly sections."), _("\
3578 When this mode is on, memory reads from readonly sections (such as .text)\n\
3579 will be read from the object file instead of from the target. This will\n\
3580 result in significant performance improvement for remote targets."),
3582 show_trust_readonly
,
3583 &setlist
, &showlist
);
3585 add_com ("monitor", class_obscure
, do_monitor_command
,
3586 _("Send a command to the remote monitor (remote targets only)."));
3588 add_cmd ("target-stack", class_maintenance
, maintenance_print_target_stack
,
3589 _("Print the name of each layer of the internal target stack."),
3590 &maintenanceprintlist
);
3592 add_setshow_boolean_cmd ("target-async", no_class
,
3593 &target_async_permitted_1
, _("\
3594 Set whether gdb controls the inferior in asynchronous mode."), _("\
3595 Show whether gdb controls the inferior in asynchronous mode."), _("\
3596 Tells gdb whether to control the inferior in asynchronous mode."),
3597 maint_set_target_async_command
,
3598 maint_show_target_async_command
,
3599 &maintenance_set_cmdlist
,
3600 &maintenance_show_cmdlist
);
3602 add_setshow_boolean_cmd ("may-write-registers", class_support
,
3603 &may_write_registers_1
, _("\
3604 Set permission to write into registers."), _("\
3605 Show permission to write into registers."), _("\
3606 When this permission is on, GDB may write into the target's registers.\n\
3607 Otherwise, any sort of write attempt will result in an error."),
3608 set_target_permissions
, NULL
,
3609 &setlist
, &showlist
);
3611 add_setshow_boolean_cmd ("may-write-memory", class_support
,
3612 &may_write_memory_1
, _("\
3613 Set permission to write into target memory."), _("\
3614 Show permission to write into target memory."), _("\
3615 When this permission is on, GDB may write into the target's memory.\n\
3616 Otherwise, any sort of write attempt will result in an error."),
3617 set_write_memory_permission
, NULL
,
3618 &setlist
, &showlist
);
3620 add_setshow_boolean_cmd ("may-insert-breakpoints", class_support
,
3621 &may_insert_breakpoints_1
, _("\
3622 Set permission to insert breakpoints in the target."), _("\
3623 Show permission to insert breakpoints in the target."), _("\
3624 When this permission is on, GDB may insert breakpoints in the program.\n\
3625 Otherwise, any sort of insertion attempt will result in an error."),
3626 set_target_permissions
, NULL
,
3627 &setlist
, &showlist
);
3629 add_setshow_boolean_cmd ("may-insert-tracepoints", class_support
,
3630 &may_insert_tracepoints_1
, _("\
3631 Set permission to insert tracepoints in the target."), _("\
3632 Show permission to insert tracepoints in the target."), _("\
3633 When this permission is on, GDB may insert tracepoints in the program.\n\
3634 Otherwise, any sort of insertion attempt will result in an error."),
3635 set_target_permissions
, NULL
,
3636 &setlist
, &showlist
);
3638 add_setshow_boolean_cmd ("may-insert-fast-tracepoints", class_support
,
3639 &may_insert_fast_tracepoints_1
, _("\
3640 Set permission to insert fast tracepoints in the target."), _("\
3641 Show permission to insert fast tracepoints in the target."), _("\
3642 When this permission is on, GDB may insert fast tracepoints.\n\
3643 Otherwise, any sort of insertion attempt will result in an error."),
3644 set_target_permissions
, NULL
,
3645 &setlist
, &showlist
);
3647 add_setshow_boolean_cmd ("may-interrupt", class_support
,
3649 Set permission to interrupt or signal the target."), _("\
3650 Show permission to interrupt or signal the target."), _("\
3651 When this permission is on, GDB may interrupt/stop the target's execution.\n\
3652 Otherwise, any attempt to interrupt or stop will be ignored."),
3653 set_target_permissions
, NULL
,
3654 &setlist
, &showlist
);
3656 add_setshow_boolean_cmd ("auto-connect-native-target", class_support
,
3657 &auto_connect_native_target
, _("\
3658 Set whether GDB may automatically connect to the native target."), _("\
3659 Show whether GDB may automatically connect to the native target."), _("\
3660 When on, and GDB is not connected to a target yet, GDB\n\
3661 attempts \"run\" and other commands with the native target."),
3662 NULL
, show_auto_connect_native_target
,
3663 &setlist
, &showlist
);