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/>. */
25 #include "target-dcache.h"
37 #include "exceptions.h"
38 #include "target-descriptions.h"
39 #include "gdbthread.h"
42 #include "inline-frame.h"
43 #include "tracepoint.h"
44 #include "gdb/fileio.h"
47 #include "target-debug.h"
49 static void target_info (char *, int);
51 static void generic_tls_error (void) ATTRIBUTE_NORETURN
;
53 static void default_terminal_info (struct target_ops
*, const char *, int);
55 static int default_watchpoint_addr_within_range (struct target_ops
*,
56 CORE_ADDR
, CORE_ADDR
, int);
58 static int default_region_ok_for_hw_watchpoint (struct target_ops
*,
61 static void default_rcmd (struct target_ops
*, const char *, struct ui_file
*);
63 static ptid_t
default_get_ada_task_ptid (struct target_ops
*self
,
66 static int default_follow_fork (struct target_ops
*self
, int follow_child
,
69 static void default_mourn_inferior (struct target_ops
*self
);
71 static int default_search_memory (struct target_ops
*ops
,
73 ULONGEST search_space_len
,
74 const gdb_byte
*pattern
,
76 CORE_ADDR
*found_addrp
);
78 static int default_verify_memory (struct target_ops
*self
,
80 CORE_ADDR memaddr
, ULONGEST size
);
82 static struct address_space
*default_thread_address_space
83 (struct target_ops
*self
, ptid_t ptid
);
85 static void tcomplain (void) ATTRIBUTE_NORETURN
;
87 static int return_zero (struct target_ops
*);
89 static int return_zero_has_execution (struct target_ops
*, ptid_t
);
91 static void target_command (char *, int);
93 static struct target_ops
*find_default_run_target (char *);
95 static struct gdbarch
*default_thread_architecture (struct target_ops
*ops
,
98 static int dummy_find_memory_regions (struct target_ops
*self
,
99 find_memory_region_ftype ignore1
,
102 static char *dummy_make_corefile_notes (struct target_ops
*self
,
103 bfd
*ignore1
, int *ignore2
);
105 static char *default_pid_to_str (struct target_ops
*ops
, ptid_t ptid
);
107 static enum exec_direction_kind default_execution_direction
108 (struct target_ops
*self
);
110 static CORE_ADDR
default_target_decr_pc_after_break (struct target_ops
*ops
,
111 struct gdbarch
*gdbarch
);
113 static struct target_ops debug_target
;
115 #include "target-delegates.c"
117 static void init_dummy_target (void);
119 static void update_current_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;
178 set_targetdebug (char *args
, int from_tty
, struct cmd_list_element
*c
)
180 update_current_target ();
184 show_targetdebug (struct ui_file
*file
, int from_tty
,
185 struct cmd_list_element
*c
, const char *value
)
187 fprintf_filtered (file
, _("Target debugging is %s.\n"), value
);
190 static void setup_target_debug (void);
192 /* The user just typed 'target' without the name of a target. */
195 target_command (char *arg
, int from_tty
)
197 fputs_filtered ("Argument required (target name). Try `help target'\n",
201 /* Default target_has_* methods for process_stratum targets. */
204 default_child_has_all_memory (struct target_ops
*ops
)
206 /* If no inferior selected, then we can't read memory here. */
207 if (ptid_equal (inferior_ptid
, null_ptid
))
214 default_child_has_memory (struct target_ops
*ops
)
216 /* If no inferior selected, then we can't read memory here. */
217 if (ptid_equal (inferior_ptid
, null_ptid
))
224 default_child_has_stack (struct target_ops
*ops
)
226 /* If no inferior selected, there's no stack. */
227 if (ptid_equal (inferior_ptid
, null_ptid
))
234 default_child_has_registers (struct target_ops
*ops
)
236 /* Can't read registers from no inferior. */
237 if (ptid_equal (inferior_ptid
, null_ptid
))
244 default_child_has_execution (struct target_ops
*ops
, ptid_t the_ptid
)
246 /* If there's no thread selected, then we can't make it run through
248 if (ptid_equal (the_ptid
, null_ptid
))
256 target_has_all_memory_1 (void)
258 struct target_ops
*t
;
260 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
261 if (t
->to_has_all_memory (t
))
268 target_has_memory_1 (void)
270 struct target_ops
*t
;
272 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
273 if (t
->to_has_memory (t
))
280 target_has_stack_1 (void)
282 struct target_ops
*t
;
284 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
285 if (t
->to_has_stack (t
))
292 target_has_registers_1 (void)
294 struct target_ops
*t
;
296 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
297 if (t
->to_has_registers (t
))
304 target_has_execution_1 (ptid_t the_ptid
)
306 struct target_ops
*t
;
308 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
309 if (t
->to_has_execution (t
, the_ptid
))
316 target_has_execution_current (void)
318 return target_has_execution_1 (inferior_ptid
);
321 /* Complete initialization of T. This ensures that various fields in
322 T are set, if needed by the target implementation. */
325 complete_target_initialization (struct target_ops
*t
)
327 /* Provide default values for all "must have" methods. */
329 if (t
->to_has_all_memory
== NULL
)
330 t
->to_has_all_memory
= return_zero
;
332 if (t
->to_has_memory
== NULL
)
333 t
->to_has_memory
= return_zero
;
335 if (t
->to_has_stack
== NULL
)
336 t
->to_has_stack
= return_zero
;
338 if (t
->to_has_registers
== NULL
)
339 t
->to_has_registers
= return_zero
;
341 if (t
->to_has_execution
== NULL
)
342 t
->to_has_execution
= return_zero_has_execution
;
344 /* These methods can be called on an unpushed target and so require
345 a default implementation if the target might plausibly be the
346 default run target. */
347 gdb_assert (t
->to_can_run
== NULL
|| (t
->to_can_async_p
!= NULL
348 && t
->to_supports_non_stop
!= NULL
));
350 install_delegators (t
);
353 /* This is used to implement the various target commands. */
356 open_target (char *args
, int from_tty
, struct cmd_list_element
*command
)
358 struct target_ops
*ops
= get_cmd_context (command
);
361 fprintf_unfiltered (gdb_stdlog
, "-> %s->to_open (...)\n",
364 ops
->to_open (args
, from_tty
);
367 fprintf_unfiltered (gdb_stdlog
, "<- %s->to_open (%s, %d)\n",
368 ops
->to_shortname
, args
, from_tty
);
371 /* Add possible target architecture T to the list and add a new
372 command 'target T->to_shortname'. Set COMPLETER as the command's
373 completer if not NULL. */
376 add_target_with_completer (struct target_ops
*t
,
377 completer_ftype
*completer
)
379 struct cmd_list_element
*c
;
381 complete_target_initialization (t
);
385 target_struct_allocsize
= DEFAULT_ALLOCSIZE
;
386 target_structs
= (struct target_ops
**) xmalloc
387 (target_struct_allocsize
* sizeof (*target_structs
));
389 if (target_struct_size
>= target_struct_allocsize
)
391 target_struct_allocsize
*= 2;
392 target_structs
= (struct target_ops
**)
393 xrealloc ((char *) target_structs
,
394 target_struct_allocsize
* sizeof (*target_structs
));
396 target_structs
[target_struct_size
++] = t
;
398 if (targetlist
== NULL
)
399 add_prefix_cmd ("target", class_run
, target_command
, _("\
400 Connect to a target machine or process.\n\
401 The first argument is the type or protocol of the target machine.\n\
402 Remaining arguments are interpreted by the target protocol. For more\n\
403 information on the arguments for a particular protocol, type\n\
404 `help target ' followed by the protocol name."),
405 &targetlist
, "target ", 0, &cmdlist
);
406 c
= add_cmd (t
->to_shortname
, no_class
, NULL
, t
->to_doc
, &targetlist
);
407 set_cmd_sfunc (c
, open_target
);
408 set_cmd_context (c
, t
);
409 if (completer
!= NULL
)
410 set_cmd_completer (c
, completer
);
413 /* Add a possible target architecture to the list. */
416 add_target (struct target_ops
*t
)
418 add_target_with_completer (t
, NULL
);
424 add_deprecated_target_alias (struct target_ops
*t
, char *alias
)
426 struct cmd_list_element
*c
;
429 /* If we use add_alias_cmd, here, we do not get the deprecated warning,
431 c
= add_cmd (alias
, no_class
, NULL
, t
->to_doc
, &targetlist
);
432 set_cmd_sfunc (c
, open_target
);
433 set_cmd_context (c
, t
);
434 alt
= xstrprintf ("target %s", t
->to_shortname
);
435 deprecate_cmd (c
, alt
);
443 current_target
.to_kill (¤t_target
);
447 target_load (const char *arg
, int from_tty
)
449 target_dcache_invalidate ();
450 (*current_target
.to_load
) (¤t_target
, arg
, from_tty
);
454 target_terminal_inferior (void)
456 /* A background resume (``run&'') should leave GDB in control of the
457 terminal. Use target_can_async_p, not target_is_async_p, since at
458 this point the target is not async yet. However, if sync_execution
459 is not set, we know it will become async prior to resume. */
460 if (target_can_async_p () && !sync_execution
)
463 /* If GDB is resuming the inferior in the foreground, install
464 inferior's terminal modes. */
465 (*current_target
.to_terminal_inferior
) (¤t_target
);
471 target_supports_terminal_ours (void)
473 struct target_ops
*t
;
475 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
477 if (t
->to_terminal_ours
!= delegate_terminal_ours
478 && t
->to_terminal_ours
!= tdefault_terminal_ours
)
488 error (_("You can't do that when your target is `%s'"),
489 current_target
.to_shortname
);
495 error (_("You can't do that without a process to debug."));
499 default_terminal_info (struct target_ops
*self
, const char *args
, int from_tty
)
501 printf_unfiltered (_("No saved terminal information.\n"));
504 /* A default implementation for the to_get_ada_task_ptid target method.
506 This function builds the PTID by using both LWP and TID as part of
507 the PTID lwp and tid elements. The pid used is the pid of the
511 default_get_ada_task_ptid (struct target_ops
*self
, long lwp
, long tid
)
513 return ptid_build (ptid_get_pid (inferior_ptid
), lwp
, tid
);
516 static enum exec_direction_kind
517 default_execution_direction (struct target_ops
*self
)
519 if (!target_can_execute_reverse
)
521 else if (!target_can_async_p ())
524 gdb_assert_not_reached ("\
525 to_execution_direction must be implemented for reverse async");
528 /* Go through the target stack from top to bottom, copying over zero
529 entries in current_target, then filling in still empty entries. In
530 effect, we are doing class inheritance through the pushed target
533 NOTE: cagney/2003-10-17: The problem with this inheritance, as it
534 is currently implemented, is that it discards any knowledge of
535 which target an inherited method originally belonged to.
536 Consequently, new new target methods should instead explicitly and
537 locally search the target stack for the target that can handle the
541 update_current_target (void)
543 struct target_ops
*t
;
545 /* First, reset current's contents. */
546 memset (¤t_target
, 0, sizeof (current_target
));
548 /* Install the delegators. */
549 install_delegators (¤t_target
);
551 current_target
.to_stratum
= target_stack
->to_stratum
;
553 #define INHERIT(FIELD, TARGET) \
554 if (!current_target.FIELD) \
555 current_target.FIELD = (TARGET)->FIELD
557 /* Do not add any new INHERITs here. Instead, use the delegation
558 mechanism provided by make-target-delegates. */
559 for (t
= target_stack
; t
; t
= t
->beneath
)
561 INHERIT (to_shortname
, t
);
562 INHERIT (to_longname
, t
);
563 INHERIT (to_attach_no_wait
, t
);
564 INHERIT (to_have_steppable_watchpoint
, t
);
565 INHERIT (to_have_continuable_watchpoint
, t
);
566 INHERIT (to_has_thread_control
, t
);
570 /* Finally, position the target-stack beneath the squashed
571 "current_target". That way code looking for a non-inherited
572 target method can quickly and simply find it. */
573 current_target
.beneath
= target_stack
;
576 setup_target_debug ();
579 /* Push a new target type into the stack of the existing target accessors,
580 possibly superseding some of the existing accessors.
582 Rather than allow an empty stack, we always have the dummy target at
583 the bottom stratum, so we can call the function vectors without
587 push_target (struct target_ops
*t
)
589 struct target_ops
**cur
;
591 /* Check magic number. If wrong, it probably means someone changed
592 the struct definition, but not all the places that initialize one. */
593 if (t
->to_magic
!= OPS_MAGIC
)
595 fprintf_unfiltered (gdb_stderr
,
596 "Magic number of %s target struct wrong\n",
598 internal_error (__FILE__
, __LINE__
,
599 _("failed internal consistency check"));
602 /* Find the proper stratum to install this target in. */
603 for (cur
= &target_stack
; (*cur
) != NULL
; cur
= &(*cur
)->beneath
)
605 if ((int) (t
->to_stratum
) >= (int) (*cur
)->to_stratum
)
609 /* If there's already targets at this stratum, remove them. */
610 /* FIXME: cagney/2003-10-15: I think this should be popping all
611 targets to CUR, and not just those at this stratum level. */
612 while ((*cur
) != NULL
&& t
->to_stratum
== (*cur
)->to_stratum
)
614 /* There's already something at this stratum level. Close it,
615 and un-hook it from the stack. */
616 struct target_ops
*tmp
= (*cur
);
618 (*cur
) = (*cur
)->beneath
;
623 /* We have removed all targets in our stratum, now add the new one. */
627 update_current_target ();
630 /* Remove a target_ops vector from the stack, wherever it may be.
631 Return how many times it was removed (0 or 1). */
634 unpush_target (struct target_ops
*t
)
636 struct target_ops
**cur
;
637 struct target_ops
*tmp
;
639 if (t
->to_stratum
== dummy_stratum
)
640 internal_error (__FILE__
, __LINE__
,
641 _("Attempt to unpush the dummy target"));
643 /* Look for the specified target. Note that we assume that a target
644 can only occur once in the target stack. */
646 for (cur
= &target_stack
; (*cur
) != NULL
; cur
= &(*cur
)->beneath
)
652 /* If we don't find target_ops, quit. Only open targets should be
657 /* Unchain the target. */
659 (*cur
) = (*cur
)->beneath
;
662 update_current_target ();
664 /* Finally close the target. Note we do this after unchaining, so
665 any target method calls from within the target_close
666 implementation don't end up in T anymore. */
673 pop_all_targets_above (enum strata above_stratum
)
675 while ((int) (current_target
.to_stratum
) > (int) above_stratum
)
677 if (!unpush_target (target_stack
))
679 fprintf_unfiltered (gdb_stderr
,
680 "pop_all_targets couldn't find target %s\n",
681 target_stack
->to_shortname
);
682 internal_error (__FILE__
, __LINE__
,
683 _("failed internal consistency check"));
690 pop_all_targets (void)
692 pop_all_targets_above (dummy_stratum
);
695 /* Return 1 if T is now pushed in the target stack. Return 0 otherwise. */
698 target_is_pushed (struct target_ops
*t
)
700 struct target_ops
*cur
;
702 /* Check magic number. If wrong, it probably means someone changed
703 the struct definition, but not all the places that initialize one. */
704 if (t
->to_magic
!= OPS_MAGIC
)
706 fprintf_unfiltered (gdb_stderr
,
707 "Magic number of %s target struct wrong\n",
709 internal_error (__FILE__
, __LINE__
,
710 _("failed internal consistency check"));
713 for (cur
= target_stack
; cur
!= NULL
; cur
= cur
->beneath
)
720 /* Default implementation of to_get_thread_local_address. */
723 generic_tls_error (void)
725 throw_error (TLS_GENERIC_ERROR
,
726 _("Cannot find thread-local variables on this target"));
729 /* Using the objfile specified in OBJFILE, find the address for the
730 current thread's thread-local storage with offset OFFSET. */
732 target_translate_tls_address (struct objfile
*objfile
, CORE_ADDR offset
)
734 volatile CORE_ADDR addr
= 0;
735 struct target_ops
*target
= ¤t_target
;
737 if (gdbarch_fetch_tls_load_module_address_p (target_gdbarch ()))
739 ptid_t ptid
= inferior_ptid
;
740 volatile struct gdb_exception ex
;
742 TRY_CATCH (ex
, RETURN_MASK_ALL
)
746 /* Fetch the load module address for this objfile. */
747 lm_addr
= gdbarch_fetch_tls_load_module_address (target_gdbarch (),
750 addr
= target
->to_get_thread_local_address (target
, ptid
,
753 /* If an error occurred, print TLS related messages here. Otherwise,
754 throw the error to some higher catcher. */
757 int objfile_is_library
= (objfile
->flags
& OBJF_SHARED
);
761 case TLS_NO_LIBRARY_SUPPORT_ERROR
:
762 error (_("Cannot find thread-local variables "
763 "in this thread library."));
765 case TLS_LOAD_MODULE_NOT_FOUND_ERROR
:
766 if (objfile_is_library
)
767 error (_("Cannot find shared library `%s' in dynamic"
768 " linker's load module list"), objfile_name (objfile
));
770 error (_("Cannot find executable file `%s' in dynamic"
771 " linker's load module list"), objfile_name (objfile
));
773 case TLS_NOT_ALLOCATED_YET_ERROR
:
774 if (objfile_is_library
)
775 error (_("The inferior has not yet allocated storage for"
776 " thread-local variables in\n"
777 "the shared library `%s'\n"
779 objfile_name (objfile
), target_pid_to_str (ptid
));
781 error (_("The inferior has not yet allocated storage for"
782 " thread-local variables in\n"
783 "the executable `%s'\n"
785 objfile_name (objfile
), target_pid_to_str (ptid
));
787 case TLS_GENERIC_ERROR
:
788 if (objfile_is_library
)
789 error (_("Cannot find thread-local storage for %s, "
790 "shared library %s:\n%s"),
791 target_pid_to_str (ptid
),
792 objfile_name (objfile
), ex
.message
);
794 error (_("Cannot find thread-local storage for %s, "
795 "executable file %s:\n%s"),
796 target_pid_to_str (ptid
),
797 objfile_name (objfile
), ex
.message
);
800 throw_exception (ex
);
805 /* It wouldn't be wrong here to try a gdbarch method, too; finding
806 TLS is an ABI-specific thing. But we don't do that yet. */
808 error (_("Cannot find thread-local variables on this target"));
814 target_xfer_status_to_string (enum target_xfer_status status
)
816 #define CASE(X) case X: return #X
819 CASE(TARGET_XFER_E_IO
);
820 CASE(TARGET_XFER_UNAVAILABLE
);
829 #define MIN(A, B) (((A) <= (B)) ? (A) : (B))
831 /* target_read_string -- read a null terminated string, up to LEN bytes,
832 from MEMADDR in target. Set *ERRNOP to the errno code, or 0 if successful.
833 Set *STRING to a pointer to malloc'd memory containing the data; the caller
834 is responsible for freeing it. Return the number of bytes successfully
838 target_read_string (CORE_ADDR memaddr
, char **string
, int len
, int *errnop
)
844 int buffer_allocated
;
846 unsigned int nbytes_read
= 0;
850 /* Small for testing. */
851 buffer_allocated
= 4;
852 buffer
= xmalloc (buffer_allocated
);
857 tlen
= MIN (len
, 4 - (memaddr
& 3));
858 offset
= memaddr
& 3;
860 errcode
= target_read_memory (memaddr
& ~3, buf
, sizeof buf
);
863 /* The transfer request might have crossed the boundary to an
864 unallocated region of memory. Retry the transfer, requesting
868 errcode
= target_read_memory (memaddr
, buf
, 1);
873 if (bufptr
- buffer
+ tlen
> buffer_allocated
)
877 bytes
= bufptr
- buffer
;
878 buffer_allocated
*= 2;
879 buffer
= xrealloc (buffer
, buffer_allocated
);
880 bufptr
= buffer
+ bytes
;
883 for (i
= 0; i
< tlen
; i
++)
885 *bufptr
++ = buf
[i
+ offset
];
886 if (buf
[i
+ offset
] == '\000')
888 nbytes_read
+= i
+ 1;
904 struct target_section_table
*
905 target_get_section_table (struct target_ops
*target
)
907 return (*target
->to_get_section_table
) (target
);
910 /* Find a section containing ADDR. */
912 struct target_section
*
913 target_section_by_addr (struct target_ops
*target
, CORE_ADDR addr
)
915 struct target_section_table
*table
= target_get_section_table (target
);
916 struct target_section
*secp
;
921 for (secp
= table
->sections
; secp
< table
->sections_end
; secp
++)
923 if (addr
>= secp
->addr
&& addr
< secp
->endaddr
)
929 /* Read memory from more than one valid target. A core file, for
930 instance, could have some of memory but delegate other bits to
931 the target below it. So, we must manually try all targets. */
933 static enum target_xfer_status
934 raw_memory_xfer_partial (struct target_ops
*ops
, gdb_byte
*readbuf
,
935 const gdb_byte
*writebuf
, ULONGEST memaddr
, LONGEST len
,
936 ULONGEST
*xfered_len
)
938 enum target_xfer_status res
;
942 res
= ops
->to_xfer_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
943 readbuf
, writebuf
, memaddr
, len
,
945 if (res
== TARGET_XFER_OK
)
948 /* Stop if the target reports that the memory is not available. */
949 if (res
== TARGET_XFER_UNAVAILABLE
)
952 /* We want to continue past core files to executables, but not
953 past a running target's memory. */
954 if (ops
->to_has_all_memory (ops
))
961 /* The cache works at the raw memory level. Make sure the cache
962 gets updated with raw contents no matter what kind of memory
963 object was originally being written. Note we do write-through
964 first, so that if it fails, we don't write to the cache contents
965 that never made it to the target. */
967 && !ptid_equal (inferior_ptid
, null_ptid
)
968 && target_dcache_init_p ()
969 && (stack_cache_enabled_p () || code_cache_enabled_p ()))
971 DCACHE
*dcache
= target_dcache_get ();
973 /* Note that writing to an area of memory which wasn't present
974 in the cache doesn't cause it to be loaded in. */
975 dcache_update (dcache
, res
, memaddr
, writebuf
, *xfered_len
);
981 /* Perform a partial memory transfer.
982 For docs see target.h, to_xfer_partial. */
984 static enum target_xfer_status
985 memory_xfer_partial_1 (struct target_ops
*ops
, enum target_object object
,
986 gdb_byte
*readbuf
, const gdb_byte
*writebuf
, ULONGEST memaddr
,
987 ULONGEST len
, ULONGEST
*xfered_len
)
989 enum target_xfer_status res
;
991 struct mem_region
*region
;
992 struct inferior
*inf
;
994 /* For accesses to unmapped overlay sections, read directly from
995 files. Must do this first, as MEMADDR may need adjustment. */
996 if (readbuf
!= NULL
&& overlay_debugging
)
998 struct obj_section
*section
= find_pc_overlay (memaddr
);
1000 if (pc_in_unmapped_range (memaddr
, section
))
1002 struct target_section_table
*table
1003 = target_get_section_table (ops
);
1004 const char *section_name
= section
->the_bfd_section
->name
;
1006 memaddr
= overlay_mapped_address (memaddr
, section
);
1007 return section_table_xfer_memory_partial (readbuf
, writebuf
,
1008 memaddr
, len
, xfered_len
,
1010 table
->sections_end
,
1015 /* Try the executable files, if "trust-readonly-sections" is set. */
1016 if (readbuf
!= NULL
&& trust_readonly
)
1018 struct target_section
*secp
;
1019 struct target_section_table
*table
;
1021 secp
= target_section_by_addr (ops
, memaddr
);
1023 && (bfd_get_section_flags (secp
->the_bfd_section
->owner
,
1024 secp
->the_bfd_section
)
1027 table
= target_get_section_table (ops
);
1028 return section_table_xfer_memory_partial (readbuf
, writebuf
,
1029 memaddr
, len
, xfered_len
,
1031 table
->sections_end
,
1036 /* Try GDB's internal data cache. */
1037 region
= lookup_mem_region (memaddr
);
1038 /* region->hi == 0 means there's no upper bound. */
1039 if (memaddr
+ len
< region
->hi
|| region
->hi
== 0)
1042 reg_len
= region
->hi
- memaddr
;
1044 switch (region
->attrib
.mode
)
1047 if (writebuf
!= NULL
)
1048 return TARGET_XFER_E_IO
;
1052 if (readbuf
!= NULL
)
1053 return TARGET_XFER_E_IO
;
1057 /* We only support writing to flash during "load" for now. */
1058 if (writebuf
!= NULL
)
1059 error (_("Writing to flash memory forbidden in this context"));
1063 return TARGET_XFER_E_IO
;
1066 if (!ptid_equal (inferior_ptid
, null_ptid
))
1067 inf
= find_inferior_pid (ptid_get_pid (inferior_ptid
));
1073 /* The dcache reads whole cache lines; that doesn't play well
1074 with reading from a trace buffer, because reading outside of
1075 the collected memory range fails. */
1076 && get_traceframe_number () == -1
1077 && (region
->attrib
.cache
1078 || (stack_cache_enabled_p () && object
== TARGET_OBJECT_STACK_MEMORY
)
1079 || (code_cache_enabled_p () && object
== TARGET_OBJECT_CODE_MEMORY
)))
1081 DCACHE
*dcache
= target_dcache_get_or_init ();
1083 return dcache_read_memory_partial (ops
, dcache
, memaddr
, readbuf
,
1084 reg_len
, xfered_len
);
1087 /* If none of those methods found the memory we wanted, fall back
1088 to a target partial transfer. Normally a single call to
1089 to_xfer_partial is enough; if it doesn't recognize an object
1090 it will call the to_xfer_partial of the next target down.
1091 But for memory this won't do. Memory is the only target
1092 object which can be read from more than one valid target.
1093 A core file, for instance, could have some of memory but
1094 delegate other bits to the target below it. So, we must
1095 manually try all targets. */
1097 res
= raw_memory_xfer_partial (ops
, readbuf
, writebuf
, memaddr
, reg_len
,
1100 /* If we still haven't got anything, return the last error. We
1105 /* Perform a partial memory transfer. For docs see target.h,
1108 static enum target_xfer_status
1109 memory_xfer_partial (struct target_ops
*ops
, enum target_object object
,
1110 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1111 ULONGEST memaddr
, ULONGEST len
, ULONGEST
*xfered_len
)
1113 enum target_xfer_status res
;
1115 /* Zero length requests are ok and require no work. */
1117 return TARGET_XFER_EOF
;
1119 /* Fill in READBUF with breakpoint shadows, or WRITEBUF with
1120 breakpoint insns, thus hiding out from higher layers whether
1121 there are software breakpoints inserted in the code stream. */
1122 if (readbuf
!= NULL
)
1124 res
= memory_xfer_partial_1 (ops
, object
, readbuf
, NULL
, memaddr
, len
,
1127 if (res
== TARGET_XFER_OK
&& !show_memory_breakpoints
)
1128 breakpoint_xfer_memory (readbuf
, NULL
, NULL
, memaddr
, *xfered_len
);
1133 struct cleanup
*old_chain
;
1135 /* A large write request is likely to be partially satisfied
1136 by memory_xfer_partial_1. We will continually malloc
1137 and free a copy of the entire write request for breakpoint
1138 shadow handling even though we only end up writing a small
1139 subset of it. Cap writes to 4KB to mitigate this. */
1140 len
= min (4096, len
);
1142 buf
= xmalloc (len
);
1143 old_chain
= make_cleanup (xfree
, buf
);
1144 memcpy (buf
, writebuf
, len
);
1146 breakpoint_xfer_memory (NULL
, buf
, writebuf
, memaddr
, len
);
1147 res
= memory_xfer_partial_1 (ops
, object
, NULL
, buf
, memaddr
, len
,
1150 do_cleanups (old_chain
);
1157 restore_show_memory_breakpoints (void *arg
)
1159 show_memory_breakpoints
= (uintptr_t) arg
;
1163 make_show_memory_breakpoints_cleanup (int show
)
1165 int current
= show_memory_breakpoints
;
1167 show_memory_breakpoints
= show
;
1168 return make_cleanup (restore_show_memory_breakpoints
,
1169 (void *) (uintptr_t) current
);
1172 /* For docs see target.h, to_xfer_partial. */
1174 enum target_xfer_status
1175 target_xfer_partial (struct target_ops
*ops
,
1176 enum target_object object
, const char *annex
,
1177 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1178 ULONGEST offset
, ULONGEST len
,
1179 ULONGEST
*xfered_len
)
1181 enum target_xfer_status retval
;
1183 gdb_assert (ops
->to_xfer_partial
!= NULL
);
1185 /* Transfer is done when LEN is zero. */
1187 return TARGET_XFER_EOF
;
1189 if (writebuf
&& !may_write_memory
)
1190 error (_("Writing to memory is not allowed (addr %s, len %s)"),
1191 core_addr_to_string_nz (offset
), plongest (len
));
1195 /* If this is a memory transfer, let the memory-specific code
1196 have a look at it instead. Memory transfers are more
1198 if (object
== TARGET_OBJECT_MEMORY
|| object
== TARGET_OBJECT_STACK_MEMORY
1199 || object
== TARGET_OBJECT_CODE_MEMORY
)
1200 retval
= memory_xfer_partial (ops
, object
, readbuf
,
1201 writebuf
, offset
, len
, xfered_len
);
1202 else if (object
== TARGET_OBJECT_RAW_MEMORY
)
1204 /* Request the normal memory object from other layers. */
1205 retval
= raw_memory_xfer_partial (ops
, readbuf
, writebuf
, offset
, len
,
1209 retval
= ops
->to_xfer_partial (ops
, object
, annex
, readbuf
,
1210 writebuf
, offset
, len
, xfered_len
);
1214 const unsigned char *myaddr
= NULL
;
1216 fprintf_unfiltered (gdb_stdlog
,
1217 "%s:target_xfer_partial "
1218 "(%d, %s, %s, %s, %s, %s) = %d, %s",
1221 (annex
? annex
: "(null)"),
1222 host_address_to_string (readbuf
),
1223 host_address_to_string (writebuf
),
1224 core_addr_to_string_nz (offset
),
1225 pulongest (len
), retval
,
1226 pulongest (*xfered_len
));
1232 if (retval
== TARGET_XFER_OK
&& myaddr
!= NULL
)
1236 fputs_unfiltered (", bytes =", gdb_stdlog
);
1237 for (i
= 0; i
< *xfered_len
; i
++)
1239 if ((((intptr_t) &(myaddr
[i
])) & 0xf) == 0)
1241 if (targetdebug
< 2 && i
> 0)
1243 fprintf_unfiltered (gdb_stdlog
, " ...");
1246 fprintf_unfiltered (gdb_stdlog
, "\n");
1249 fprintf_unfiltered (gdb_stdlog
, " %02x", myaddr
[i
] & 0xff);
1253 fputc_unfiltered ('\n', gdb_stdlog
);
1256 /* Check implementations of to_xfer_partial update *XFERED_LEN
1257 properly. Do assertion after printing debug messages, so that we
1258 can find more clues on assertion failure from debugging messages. */
1259 if (retval
== TARGET_XFER_OK
|| retval
== TARGET_XFER_UNAVAILABLE
)
1260 gdb_assert (*xfered_len
> 0);
1265 /* Read LEN bytes of target memory at address MEMADDR, placing the
1266 results in GDB's memory at MYADDR. Returns either 0 for success or
1267 TARGET_XFER_E_IO if any error occurs.
1269 If an error occurs, no guarantee is made about the contents of the data at
1270 MYADDR. In particular, the caller should not depend upon partial reads
1271 filling the buffer with good data. There is no way for the caller to know
1272 how much good data might have been transfered anyway. Callers that can
1273 deal with partial reads should call target_read (which will retry until
1274 it makes no progress, and then return how much was transferred). */
1277 target_read_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1279 /* Dispatch to the topmost target, not the flattened current_target.
1280 Memory accesses check target->to_has_(all_)memory, and the
1281 flattened target doesn't inherit those. */
1282 if (target_read (current_target
.beneath
, TARGET_OBJECT_MEMORY
, NULL
,
1283 myaddr
, memaddr
, len
) == len
)
1286 return TARGET_XFER_E_IO
;
1289 /* Like target_read_memory, but specify explicitly that this is a read
1290 from the target's raw memory. That is, this read bypasses the
1291 dcache, breakpoint shadowing, etc. */
1294 target_read_raw_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1296 /* See comment in target_read_memory about why the request starts at
1297 current_target.beneath. */
1298 if (target_read (current_target
.beneath
, TARGET_OBJECT_RAW_MEMORY
, NULL
,
1299 myaddr
, memaddr
, len
) == len
)
1302 return TARGET_XFER_E_IO
;
1305 /* Like target_read_memory, but specify explicitly that this is a read from
1306 the target's stack. This may trigger different cache behavior. */
1309 target_read_stack (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1311 /* See comment in target_read_memory about why the request starts at
1312 current_target.beneath. */
1313 if (target_read (current_target
.beneath
, TARGET_OBJECT_STACK_MEMORY
, NULL
,
1314 myaddr
, memaddr
, len
) == len
)
1317 return TARGET_XFER_E_IO
;
1320 /* Like target_read_memory, but specify explicitly that this is a read from
1321 the target's code. This may trigger different cache behavior. */
1324 target_read_code (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1326 /* See comment in target_read_memory about why the request starts at
1327 current_target.beneath. */
1328 if (target_read (current_target
.beneath
, TARGET_OBJECT_CODE_MEMORY
, NULL
,
1329 myaddr
, memaddr
, len
) == len
)
1332 return TARGET_XFER_E_IO
;
1335 /* Write LEN bytes from MYADDR to target memory at address MEMADDR.
1336 Returns either 0 for success or TARGET_XFER_E_IO if any
1337 error occurs. If an error occurs, no guarantee is made about how
1338 much data got written. Callers that can deal with partial writes
1339 should call target_write. */
1342 target_write_memory (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ssize_t len
)
1344 /* See comment in target_read_memory about why the request starts at
1345 current_target.beneath. */
1346 if (target_write (current_target
.beneath
, TARGET_OBJECT_MEMORY
, NULL
,
1347 myaddr
, memaddr
, len
) == len
)
1350 return TARGET_XFER_E_IO
;
1353 /* Write LEN bytes from MYADDR to target raw memory at address
1354 MEMADDR. Returns either 0 for success or TARGET_XFER_E_IO
1355 if any error occurs. If an error occurs, no guarantee is made
1356 about how much data got written. Callers that can deal with
1357 partial writes should call target_write. */
1360 target_write_raw_memory (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ssize_t len
)
1362 /* See comment in target_read_memory about why the request starts at
1363 current_target.beneath. */
1364 if (target_write (current_target
.beneath
, TARGET_OBJECT_RAW_MEMORY
, NULL
,
1365 myaddr
, memaddr
, len
) == len
)
1368 return TARGET_XFER_E_IO
;
1371 /* Fetch the target's memory map. */
1374 target_memory_map (void)
1376 VEC(mem_region_s
) *result
;
1377 struct mem_region
*last_one
, *this_one
;
1379 struct target_ops
*t
;
1381 result
= current_target
.to_memory_map (¤t_target
);
1385 qsort (VEC_address (mem_region_s
, result
),
1386 VEC_length (mem_region_s
, result
),
1387 sizeof (struct mem_region
), mem_region_cmp
);
1389 /* Check that regions do not overlap. Simultaneously assign
1390 a numbering for the "mem" commands to use to refer to
1393 for (ix
= 0; VEC_iterate (mem_region_s
, result
, ix
, this_one
); ix
++)
1395 this_one
->number
= ix
;
1397 if (last_one
&& last_one
->hi
> this_one
->lo
)
1399 warning (_("Overlapping regions in memory map: ignoring"));
1400 VEC_free (mem_region_s
, result
);
1403 last_one
= this_one
;
1410 target_flash_erase (ULONGEST address
, LONGEST length
)
1412 current_target
.to_flash_erase (¤t_target
, address
, length
);
1416 target_flash_done (void)
1418 current_target
.to_flash_done (¤t_target
);
1422 show_trust_readonly (struct ui_file
*file
, int from_tty
,
1423 struct cmd_list_element
*c
, const char *value
)
1425 fprintf_filtered (file
,
1426 _("Mode for reading from readonly sections is %s.\n"),
1430 /* Target vector read/write partial wrapper functions. */
1432 static enum target_xfer_status
1433 target_read_partial (struct target_ops
*ops
,
1434 enum target_object object
,
1435 const char *annex
, gdb_byte
*buf
,
1436 ULONGEST offset
, ULONGEST len
,
1437 ULONGEST
*xfered_len
)
1439 return target_xfer_partial (ops
, object
, annex
, buf
, NULL
, offset
, len
,
1443 static enum target_xfer_status
1444 target_write_partial (struct target_ops
*ops
,
1445 enum target_object object
,
1446 const char *annex
, const gdb_byte
*buf
,
1447 ULONGEST offset
, LONGEST len
, ULONGEST
*xfered_len
)
1449 return target_xfer_partial (ops
, object
, annex
, NULL
, buf
, offset
, len
,
1453 /* Wrappers to perform the full transfer. */
1455 /* For docs on target_read see target.h. */
1458 target_read (struct target_ops
*ops
,
1459 enum target_object object
,
1460 const char *annex
, gdb_byte
*buf
,
1461 ULONGEST offset
, LONGEST len
)
1465 while (xfered
< len
)
1467 ULONGEST xfered_len
;
1468 enum target_xfer_status status
;
1470 status
= target_read_partial (ops
, object
, annex
,
1471 (gdb_byte
*) buf
+ xfered
,
1472 offset
+ xfered
, len
- xfered
,
1475 /* Call an observer, notifying them of the xfer progress? */
1476 if (status
== TARGET_XFER_EOF
)
1478 else if (status
== TARGET_XFER_OK
)
1480 xfered
+= xfered_len
;
1490 /* Assuming that the entire [begin, end) range of memory cannot be
1491 read, try to read whatever subrange is possible to read.
1493 The function returns, in RESULT, either zero or one memory block.
1494 If there's a readable subrange at the beginning, it is completely
1495 read and returned. Any further readable subrange will not be read.
1496 Otherwise, if there's a readable subrange at the end, it will be
1497 completely read and returned. Any readable subranges before it
1498 (obviously, not starting at the beginning), will be ignored. In
1499 other cases -- either no readable subrange, or readable subrange(s)
1500 that is neither at the beginning, or end, nothing is returned.
1502 The purpose of this function is to handle a read across a boundary
1503 of accessible memory in a case when memory map is not available.
1504 The above restrictions are fine for this case, but will give
1505 incorrect results if the memory is 'patchy'. However, supporting
1506 'patchy' memory would require trying to read every single byte,
1507 and it seems unacceptable solution. Explicit memory map is
1508 recommended for this case -- and target_read_memory_robust will
1509 take care of reading multiple ranges then. */
1512 read_whatever_is_readable (struct target_ops
*ops
,
1513 ULONGEST begin
, ULONGEST end
,
1514 VEC(memory_read_result_s
) **result
)
1516 gdb_byte
*buf
= xmalloc (end
- begin
);
1517 ULONGEST current_begin
= begin
;
1518 ULONGEST current_end
= end
;
1520 memory_read_result_s r
;
1521 ULONGEST xfered_len
;
1523 /* If we previously failed to read 1 byte, nothing can be done here. */
1524 if (end
- begin
<= 1)
1530 /* Check that either first or the last byte is readable, and give up
1531 if not. This heuristic is meant to permit reading accessible memory
1532 at the boundary of accessible region. */
1533 if (target_read_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1534 buf
, begin
, 1, &xfered_len
) == TARGET_XFER_OK
)
1539 else if (target_read_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1540 buf
+ (end
-begin
) - 1, end
- 1, 1,
1541 &xfered_len
) == TARGET_XFER_OK
)
1552 /* Loop invariant is that the [current_begin, current_end) was previously
1553 found to be not readable as a whole.
1555 Note loop condition -- if the range has 1 byte, we can't divide the range
1556 so there's no point trying further. */
1557 while (current_end
- current_begin
> 1)
1559 ULONGEST first_half_begin
, first_half_end
;
1560 ULONGEST second_half_begin
, second_half_end
;
1562 ULONGEST middle
= current_begin
+ (current_end
- current_begin
)/2;
1566 first_half_begin
= current_begin
;
1567 first_half_end
= middle
;
1568 second_half_begin
= middle
;
1569 second_half_end
= current_end
;
1573 first_half_begin
= middle
;
1574 first_half_end
= current_end
;
1575 second_half_begin
= current_begin
;
1576 second_half_end
= middle
;
1579 xfer
= target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1580 buf
+ (first_half_begin
- begin
),
1582 first_half_end
- first_half_begin
);
1584 if (xfer
== first_half_end
- first_half_begin
)
1586 /* This half reads up fine. So, the error must be in the
1588 current_begin
= second_half_begin
;
1589 current_end
= second_half_end
;
1593 /* This half is not readable. Because we've tried one byte, we
1594 know some part of this half if actually redable. Go to the next
1595 iteration to divide again and try to read.
1597 We don't handle the other half, because this function only tries
1598 to read a single readable subrange. */
1599 current_begin
= first_half_begin
;
1600 current_end
= first_half_end
;
1606 /* The [begin, current_begin) range has been read. */
1608 r
.end
= current_begin
;
1613 /* The [current_end, end) range has been read. */
1614 LONGEST rlen
= end
- current_end
;
1616 r
.data
= xmalloc (rlen
);
1617 memcpy (r
.data
, buf
+ current_end
- begin
, rlen
);
1618 r
.begin
= current_end
;
1622 VEC_safe_push(memory_read_result_s
, (*result
), &r
);
1626 free_memory_read_result_vector (void *x
)
1628 VEC(memory_read_result_s
) *v
= x
;
1629 memory_read_result_s
*current
;
1632 for (ix
= 0; VEC_iterate (memory_read_result_s
, v
, ix
, current
); ++ix
)
1634 xfree (current
->data
);
1636 VEC_free (memory_read_result_s
, v
);
1639 VEC(memory_read_result_s
) *
1640 read_memory_robust (struct target_ops
*ops
, ULONGEST offset
, LONGEST len
)
1642 VEC(memory_read_result_s
) *result
= 0;
1645 while (xfered
< len
)
1647 struct mem_region
*region
= lookup_mem_region (offset
+ xfered
);
1650 /* If there is no explicit region, a fake one should be created. */
1651 gdb_assert (region
);
1653 if (region
->hi
== 0)
1654 rlen
= len
- xfered
;
1656 rlen
= region
->hi
- offset
;
1658 if (region
->attrib
.mode
== MEM_NONE
|| region
->attrib
.mode
== MEM_WO
)
1660 /* Cannot read this region. Note that we can end up here only
1661 if the region is explicitly marked inaccessible, or
1662 'inaccessible-by-default' is in effect. */
1667 LONGEST to_read
= min (len
- xfered
, rlen
);
1668 gdb_byte
*buffer
= (gdb_byte
*)xmalloc (to_read
);
1670 LONGEST xfer
= target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1671 (gdb_byte
*) buffer
,
1672 offset
+ xfered
, to_read
);
1673 /* Call an observer, notifying them of the xfer progress? */
1676 /* Got an error reading full chunk. See if maybe we can read
1679 read_whatever_is_readable (ops
, offset
+ xfered
,
1680 offset
+ xfered
+ to_read
, &result
);
1685 struct memory_read_result r
;
1687 r
.begin
= offset
+ xfered
;
1688 r
.end
= r
.begin
+ xfer
;
1689 VEC_safe_push (memory_read_result_s
, result
, &r
);
1699 /* An alternative to target_write with progress callbacks. */
1702 target_write_with_progress (struct target_ops
*ops
,
1703 enum target_object object
,
1704 const char *annex
, const gdb_byte
*buf
,
1705 ULONGEST offset
, LONGEST len
,
1706 void (*progress
) (ULONGEST
, void *), void *baton
)
1710 /* Give the progress callback a chance to set up. */
1712 (*progress
) (0, baton
);
1714 while (xfered
< len
)
1716 ULONGEST xfered_len
;
1717 enum target_xfer_status status
;
1719 status
= target_write_partial (ops
, object
, annex
,
1720 (gdb_byte
*) buf
+ xfered
,
1721 offset
+ xfered
, len
- xfered
,
1724 if (status
!= TARGET_XFER_OK
)
1725 return status
== TARGET_XFER_EOF
? xfered
: -1;
1728 (*progress
) (xfered_len
, baton
);
1730 xfered
+= xfered_len
;
1736 /* For docs on target_write see target.h. */
1739 target_write (struct target_ops
*ops
,
1740 enum target_object object
,
1741 const char *annex
, const gdb_byte
*buf
,
1742 ULONGEST offset
, LONGEST len
)
1744 return target_write_with_progress (ops
, object
, annex
, buf
, offset
, len
,
1748 /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return
1749 the size of the transferred data. PADDING additional bytes are
1750 available in *BUF_P. This is a helper function for
1751 target_read_alloc; see the declaration of that function for more
1755 target_read_alloc_1 (struct target_ops
*ops
, enum target_object object
,
1756 const char *annex
, gdb_byte
**buf_p
, int padding
)
1758 size_t buf_alloc
, buf_pos
;
1761 /* This function does not have a length parameter; it reads the
1762 entire OBJECT). Also, it doesn't support objects fetched partly
1763 from one target and partly from another (in a different stratum,
1764 e.g. a core file and an executable). Both reasons make it
1765 unsuitable for reading memory. */
1766 gdb_assert (object
!= TARGET_OBJECT_MEMORY
);
1768 /* Start by reading up to 4K at a time. The target will throttle
1769 this number down if necessary. */
1771 buf
= xmalloc (buf_alloc
);
1775 ULONGEST xfered_len
;
1776 enum target_xfer_status status
;
1778 status
= target_read_partial (ops
, object
, annex
, &buf
[buf_pos
],
1779 buf_pos
, buf_alloc
- buf_pos
- padding
,
1782 if (status
== TARGET_XFER_EOF
)
1784 /* Read all there was. */
1791 else if (status
!= TARGET_XFER_OK
)
1793 /* An error occurred. */
1795 return TARGET_XFER_E_IO
;
1798 buf_pos
+= xfered_len
;
1800 /* If the buffer is filling up, expand it. */
1801 if (buf_alloc
< buf_pos
* 2)
1804 buf
= xrealloc (buf
, buf_alloc
);
1811 /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return
1812 the size of the transferred data. See the declaration in "target.h"
1813 function for more information about the return value. */
1816 target_read_alloc (struct target_ops
*ops
, enum target_object object
,
1817 const char *annex
, gdb_byte
**buf_p
)
1819 return target_read_alloc_1 (ops
, object
, annex
, buf_p
, 0);
1822 /* Read OBJECT/ANNEX using OPS. The result is NUL-terminated and
1823 returned as a string, allocated using xmalloc. If an error occurs
1824 or the transfer is unsupported, NULL is returned. Empty objects
1825 are returned as allocated but empty strings. A warning is issued
1826 if the result contains any embedded NUL bytes. */
1829 target_read_stralloc (struct target_ops
*ops
, enum target_object object
,
1834 LONGEST i
, transferred
;
1836 transferred
= target_read_alloc_1 (ops
, object
, annex
, &buffer
, 1);
1837 bufstr
= (char *) buffer
;
1839 if (transferred
< 0)
1842 if (transferred
== 0)
1843 return xstrdup ("");
1845 bufstr
[transferred
] = 0;
1847 /* Check for embedded NUL bytes; but allow trailing NULs. */
1848 for (i
= strlen (bufstr
); i
< transferred
; i
++)
1851 warning (_("target object %d, annex %s, "
1852 "contained unexpected null characters"),
1853 (int) object
, annex
? annex
: "(none)");
1860 /* Memory transfer methods. */
1863 get_target_memory (struct target_ops
*ops
, CORE_ADDR addr
, gdb_byte
*buf
,
1866 /* This method is used to read from an alternate, non-current
1867 target. This read must bypass the overlay support (as symbols
1868 don't match this target), and GDB's internal cache (wrong cache
1869 for this target). */
1870 if (target_read (ops
, TARGET_OBJECT_RAW_MEMORY
, NULL
, buf
, addr
, len
)
1872 memory_error (TARGET_XFER_E_IO
, addr
);
1876 get_target_memory_unsigned (struct target_ops
*ops
, CORE_ADDR addr
,
1877 int len
, enum bfd_endian byte_order
)
1879 gdb_byte buf
[sizeof (ULONGEST
)];
1881 gdb_assert (len
<= sizeof (buf
));
1882 get_target_memory (ops
, addr
, buf
, len
);
1883 return extract_unsigned_integer (buf
, len
, byte_order
);
1889 target_insert_breakpoint (struct gdbarch
*gdbarch
,
1890 struct bp_target_info
*bp_tgt
)
1892 if (!may_insert_breakpoints
)
1894 warning (_("May not insert breakpoints"));
1898 return current_target
.to_insert_breakpoint (¤t_target
,
1905 target_remove_breakpoint (struct gdbarch
*gdbarch
,
1906 struct bp_target_info
*bp_tgt
)
1908 /* This is kind of a weird case to handle, but the permission might
1909 have been changed after breakpoints were inserted - in which case
1910 we should just take the user literally and assume that any
1911 breakpoints should be left in place. */
1912 if (!may_insert_breakpoints
)
1914 warning (_("May not remove breakpoints"));
1918 return current_target
.to_remove_breakpoint (¤t_target
,
1923 target_info (char *args
, int from_tty
)
1925 struct target_ops
*t
;
1926 int has_all_mem
= 0;
1928 if (symfile_objfile
!= NULL
)
1929 printf_unfiltered (_("Symbols from \"%s\".\n"),
1930 objfile_name (symfile_objfile
));
1932 for (t
= target_stack
; t
!= NULL
; t
= t
->beneath
)
1934 if (!(*t
->to_has_memory
) (t
))
1937 if ((int) (t
->to_stratum
) <= (int) dummy_stratum
)
1940 printf_unfiltered (_("\tWhile running this, "
1941 "GDB does not access memory from...\n"));
1942 printf_unfiltered ("%s:\n", t
->to_longname
);
1943 (t
->to_files_info
) (t
);
1944 has_all_mem
= (*t
->to_has_all_memory
) (t
);
1948 /* This function is called before any new inferior is created, e.g.
1949 by running a program, attaching, or connecting to a target.
1950 It cleans up any state from previous invocations which might
1951 change between runs. This is a subset of what target_preopen
1952 resets (things which might change between targets). */
1955 target_pre_inferior (int from_tty
)
1957 /* Clear out solib state. Otherwise the solib state of the previous
1958 inferior might have survived and is entirely wrong for the new
1959 target. This has been observed on GNU/Linux using glibc 2.3. How
1971 Cannot access memory at address 0xdeadbeef
1974 /* In some OSs, the shared library list is the same/global/shared
1975 across inferiors. If code is shared between processes, so are
1976 memory regions and features. */
1977 if (!gdbarch_has_global_solist (target_gdbarch ()))
1979 no_shared_libraries (NULL
, from_tty
);
1981 invalidate_target_mem_regions ();
1983 target_clear_description ();
1986 agent_capability_invalidate ();
1989 /* Callback for iterate_over_inferiors. Gets rid of the given
1993 dispose_inferior (struct inferior
*inf
, void *args
)
1995 struct thread_info
*thread
;
1997 thread
= any_thread_of_process (inf
->pid
);
2000 switch_to_thread (thread
->ptid
);
2002 /* Core inferiors actually should be detached, not killed. */
2003 if (target_has_execution
)
2006 target_detach (NULL
, 0);
2012 /* This is to be called by the open routine before it does
2016 target_preopen (int from_tty
)
2020 if (have_inferiors ())
2023 || !have_live_inferiors ()
2024 || query (_("A program is being debugged already. Kill it? ")))
2025 iterate_over_inferiors (dispose_inferior
, NULL
);
2027 error (_("Program not killed."));
2030 /* Calling target_kill may remove the target from the stack. But if
2031 it doesn't (which seems like a win for UDI), remove it now. */
2032 /* Leave the exec target, though. The user may be switching from a
2033 live process to a core of the same program. */
2034 pop_all_targets_above (file_stratum
);
2036 target_pre_inferior (from_tty
);
2039 /* Detach a target after doing deferred register stores. */
2042 target_detach (const char *args
, int from_tty
)
2044 struct target_ops
* t
;
2046 if (gdbarch_has_global_breakpoints (target_gdbarch ()))
2047 /* Don't remove global breakpoints here. They're removed on
2048 disconnection from the target. */
2051 /* If we're in breakpoints-always-inserted mode, have to remove
2052 them before detaching. */
2053 remove_breakpoints_pid (ptid_get_pid (inferior_ptid
));
2055 prepare_for_detach ();
2057 current_target
.to_detach (¤t_target
, args
, from_tty
);
2061 target_disconnect (const char *args
, int from_tty
)
2063 /* If we're in breakpoints-always-inserted mode or if breakpoints
2064 are global across processes, we have to remove them before
2066 remove_breakpoints ();
2068 current_target
.to_disconnect (¤t_target
, args
, from_tty
);
2072 target_wait (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
2074 return (current_target
.to_wait
) (¤t_target
, ptid
, status
, options
);
2078 target_pid_to_str (ptid_t ptid
)
2080 return (*current_target
.to_pid_to_str
) (¤t_target
, ptid
);
2084 target_thread_name (struct thread_info
*info
)
2086 return current_target
.to_thread_name (¤t_target
, info
);
2090 target_resume (ptid_t ptid
, int step
, enum gdb_signal signal
)
2092 struct target_ops
*t
;
2094 target_dcache_invalidate ();
2096 current_target
.to_resume (¤t_target
, ptid
, step
, signal
);
2098 registers_changed_ptid (ptid
);
2099 /* We only set the internal executing state here. The user/frontend
2100 running state is set at a higher level. */
2101 set_executing (ptid
, 1);
2102 clear_inline_frame_state (ptid
);
2106 target_pass_signals (int numsigs
, unsigned char *pass_signals
)
2108 (*current_target
.to_pass_signals
) (¤t_target
, numsigs
, pass_signals
);
2112 target_program_signals (int numsigs
, unsigned char *program_signals
)
2114 (*current_target
.to_program_signals
) (¤t_target
,
2115 numsigs
, program_signals
);
2119 default_follow_fork (struct target_ops
*self
, int follow_child
,
2122 /* Some target returned a fork event, but did not know how to follow it. */
2123 internal_error (__FILE__
, __LINE__
,
2124 _("could not find a target to follow fork"));
2127 /* Look through the list of possible targets for a target that can
2131 target_follow_fork (int follow_child
, int detach_fork
)
2133 return current_target
.to_follow_fork (¤t_target
,
2134 follow_child
, detach_fork
);
2138 default_mourn_inferior (struct target_ops
*self
)
2140 internal_error (__FILE__
, __LINE__
,
2141 _("could not find a target to follow mourn inferior"));
2145 target_mourn_inferior (void)
2147 current_target
.to_mourn_inferior (¤t_target
);
2149 /* We no longer need to keep handles on any of the object files.
2150 Make sure to release them to avoid unnecessarily locking any
2151 of them while we're not actually debugging. */
2152 bfd_cache_close_all ();
2155 /* Look for a target which can describe architectural features, starting
2156 from TARGET. If we find one, return its description. */
2158 const struct target_desc
*
2159 target_read_description (struct target_ops
*target
)
2161 return target
->to_read_description (target
);
2164 /* This implements a basic search of memory, reading target memory and
2165 performing the search here (as opposed to performing the search in on the
2166 target side with, for example, gdbserver). */
2169 simple_search_memory (struct target_ops
*ops
,
2170 CORE_ADDR start_addr
, ULONGEST search_space_len
,
2171 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2172 CORE_ADDR
*found_addrp
)
2174 /* NOTE: also defined in find.c testcase. */
2175 #define SEARCH_CHUNK_SIZE 16000
2176 const unsigned chunk_size
= SEARCH_CHUNK_SIZE
;
2177 /* Buffer to hold memory contents for searching. */
2178 gdb_byte
*search_buf
;
2179 unsigned search_buf_size
;
2180 struct cleanup
*old_cleanups
;
2182 search_buf_size
= chunk_size
+ pattern_len
- 1;
2184 /* No point in trying to allocate a buffer larger than the search space. */
2185 if (search_space_len
< search_buf_size
)
2186 search_buf_size
= search_space_len
;
2188 search_buf
= malloc (search_buf_size
);
2189 if (search_buf
== NULL
)
2190 error (_("Unable to allocate memory to perform the search."));
2191 old_cleanups
= make_cleanup (free_current_contents
, &search_buf
);
2193 /* Prime the search buffer. */
2195 if (target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2196 search_buf
, start_addr
, search_buf_size
) != search_buf_size
)
2198 warning (_("Unable to access %s bytes of target "
2199 "memory at %s, halting search."),
2200 pulongest (search_buf_size
), hex_string (start_addr
));
2201 do_cleanups (old_cleanups
);
2205 /* Perform the search.
2207 The loop is kept simple by allocating [N + pattern-length - 1] bytes.
2208 When we've scanned N bytes we copy the trailing bytes to the start and
2209 read in another N bytes. */
2211 while (search_space_len
>= pattern_len
)
2213 gdb_byte
*found_ptr
;
2214 unsigned nr_search_bytes
= min (search_space_len
, search_buf_size
);
2216 found_ptr
= memmem (search_buf
, nr_search_bytes
,
2217 pattern
, pattern_len
);
2219 if (found_ptr
!= NULL
)
2221 CORE_ADDR found_addr
= start_addr
+ (found_ptr
- search_buf
);
2223 *found_addrp
= found_addr
;
2224 do_cleanups (old_cleanups
);
2228 /* Not found in this chunk, skip to next chunk. */
2230 /* Don't let search_space_len wrap here, it's unsigned. */
2231 if (search_space_len
>= chunk_size
)
2232 search_space_len
-= chunk_size
;
2234 search_space_len
= 0;
2236 if (search_space_len
>= pattern_len
)
2238 unsigned keep_len
= search_buf_size
- chunk_size
;
2239 CORE_ADDR read_addr
= start_addr
+ chunk_size
+ keep_len
;
2242 /* Copy the trailing part of the previous iteration to the front
2243 of the buffer for the next iteration. */
2244 gdb_assert (keep_len
== pattern_len
- 1);
2245 memcpy (search_buf
, search_buf
+ chunk_size
, keep_len
);
2247 nr_to_read
= min (search_space_len
- keep_len
, chunk_size
);
2249 if (target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2250 search_buf
+ keep_len
, read_addr
,
2251 nr_to_read
) != nr_to_read
)
2253 warning (_("Unable to access %s bytes of target "
2254 "memory at %s, halting search."),
2255 plongest (nr_to_read
),
2256 hex_string (read_addr
));
2257 do_cleanups (old_cleanups
);
2261 start_addr
+= chunk_size
;
2267 do_cleanups (old_cleanups
);
2271 /* Default implementation of memory-searching. */
2274 default_search_memory (struct target_ops
*self
,
2275 CORE_ADDR start_addr
, ULONGEST search_space_len
,
2276 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2277 CORE_ADDR
*found_addrp
)
2279 /* Start over from the top of the target stack. */
2280 return simple_search_memory (current_target
.beneath
,
2281 start_addr
, search_space_len
,
2282 pattern
, pattern_len
, found_addrp
);
2285 /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the
2286 sequence of bytes in PATTERN with length PATTERN_LEN.
2288 The result is 1 if found, 0 if not found, and -1 if there was an error
2289 requiring halting of the search (e.g. memory read error).
2290 If the pattern is found the address is recorded in FOUND_ADDRP. */
2293 target_search_memory (CORE_ADDR start_addr
, ULONGEST search_space_len
,
2294 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2295 CORE_ADDR
*found_addrp
)
2297 return current_target
.to_search_memory (¤t_target
, start_addr
,
2299 pattern
, pattern_len
, found_addrp
);
2302 /* Look through the currently pushed targets. If none of them will
2303 be able to restart the currently running process, issue an error
2307 target_require_runnable (void)
2309 struct target_ops
*t
;
2311 for (t
= target_stack
; t
!= NULL
; t
= t
->beneath
)
2313 /* If this target knows how to create a new program, then
2314 assume we will still be able to after killing the current
2315 one. Either killing and mourning will not pop T, or else
2316 find_default_run_target will find it again. */
2317 if (t
->to_create_inferior
!= NULL
)
2320 /* Do not worry about targets at certain strata that can not
2321 create inferiors. Assume they will be pushed again if
2322 necessary, and continue to the process_stratum. */
2323 if (t
->to_stratum
== thread_stratum
2324 || t
->to_stratum
== record_stratum
2325 || t
->to_stratum
== arch_stratum
)
2328 error (_("The \"%s\" target does not support \"run\". "
2329 "Try \"help target\" or \"continue\"."),
2333 /* This function is only called if the target is running. In that
2334 case there should have been a process_stratum target and it
2335 should either know how to create inferiors, or not... */
2336 internal_error (__FILE__
, __LINE__
, _("No targets found"));
2339 /* Whether GDB is allowed to fall back to the default run target for
2340 "run", "attach", etc. when no target is connected yet. */
2341 static int auto_connect_native_target
= 1;
2344 show_auto_connect_native_target (struct ui_file
*file
, int from_tty
,
2345 struct cmd_list_element
*c
, const char *value
)
2347 fprintf_filtered (file
,
2348 _("Whether GDB may automatically connect to the "
2349 "native target is %s.\n"),
2353 /* Look through the list of possible targets for a target that can
2354 execute a run or attach command without any other data. This is
2355 used to locate the default process stratum.
2357 If DO_MESG is not NULL, the result is always valid (error() is
2358 called for errors); else, return NULL on error. */
2360 static struct target_ops
*
2361 find_default_run_target (char *do_mesg
)
2363 struct target_ops
*runable
= NULL
;
2365 if (auto_connect_native_target
)
2367 struct target_ops
**t
;
2370 for (t
= target_structs
; t
< target_structs
+ target_struct_size
;
2373 if ((*t
)->to_can_run
!= delegate_can_run
&& target_can_run (*t
))
2384 if (runable
== NULL
)
2387 error (_("Don't know how to %s. Try \"help target\"."), do_mesg
);
2398 find_attach_target (void)
2400 struct target_ops
*t
;
2402 /* If a target on the current stack can attach, use it. */
2403 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2405 if (t
->to_attach
!= NULL
)
2409 /* Otherwise, use the default run target for attaching. */
2411 t
= find_default_run_target ("attach");
2419 find_run_target (void)
2421 struct target_ops
*t
;
2423 /* If a target on the current stack can attach, use it. */
2424 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2426 if (t
->to_create_inferior
!= NULL
)
2430 /* Otherwise, use the default run target. */
2432 t
= find_default_run_target ("run");
2437 /* Implement the "info proc" command. */
2440 target_info_proc (const char *args
, enum info_proc_what what
)
2442 struct target_ops
*t
;
2444 /* If we're already connected to something that can get us OS
2445 related data, use it. Otherwise, try using the native
2447 if (current_target
.to_stratum
>= process_stratum
)
2448 t
= current_target
.beneath
;
2450 t
= find_default_run_target (NULL
);
2452 for (; t
!= NULL
; t
= t
->beneath
)
2454 if (t
->to_info_proc
!= NULL
)
2456 t
->to_info_proc (t
, args
, what
);
2459 fprintf_unfiltered (gdb_stdlog
,
2460 "target_info_proc (\"%s\", %d)\n", args
, what
);
2470 find_default_supports_disable_randomization (struct target_ops
*self
)
2472 struct target_ops
*t
;
2474 t
= find_default_run_target (NULL
);
2475 if (t
&& t
->to_supports_disable_randomization
)
2476 return (t
->to_supports_disable_randomization
) (t
);
2481 target_supports_disable_randomization (void)
2483 struct target_ops
*t
;
2485 for (t
= ¤t_target
; t
!= NULL
; t
= t
->beneath
)
2486 if (t
->to_supports_disable_randomization
)
2487 return t
->to_supports_disable_randomization (t
);
2493 target_get_osdata (const char *type
)
2495 struct target_ops
*t
;
2497 /* If we're already connected to something that can get us OS
2498 related data, use it. Otherwise, try using the native
2500 if (current_target
.to_stratum
>= process_stratum
)
2501 t
= current_target
.beneath
;
2503 t
= find_default_run_target ("get OS data");
2508 return target_read_stralloc (t
, TARGET_OBJECT_OSDATA
, type
);
2511 static struct address_space
*
2512 default_thread_address_space (struct target_ops
*self
, ptid_t ptid
)
2514 struct inferior
*inf
;
2516 /* Fall-back to the "main" address space of the inferior. */
2517 inf
= find_inferior_pid (ptid_get_pid (ptid
));
2519 if (inf
== NULL
|| inf
->aspace
== NULL
)
2520 internal_error (__FILE__
, __LINE__
,
2521 _("Can't determine the current "
2522 "address space of thread %s\n"),
2523 target_pid_to_str (ptid
));
2528 /* Determine the current address space of thread PTID. */
2530 struct address_space
*
2531 target_thread_address_space (ptid_t ptid
)
2533 struct address_space
*aspace
;
2535 aspace
= current_target
.to_thread_address_space (¤t_target
, ptid
);
2536 gdb_assert (aspace
!= NULL
);
2542 /* Target file operations. */
2544 static struct target_ops
*
2545 default_fileio_target (void)
2547 /* If we're already connected to something that can perform
2548 file I/O, use it. Otherwise, try using the native target. */
2549 if (current_target
.to_stratum
>= process_stratum
)
2550 return current_target
.beneath
;
2552 return find_default_run_target ("file I/O");
2555 /* Open FILENAME on the target, using FLAGS and MODE. Return a
2556 target file descriptor, or -1 if an error occurs (and set
2559 target_fileio_open (const char *filename
, int flags
, int mode
,
2562 struct target_ops
*t
;
2564 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
2566 if (t
->to_fileio_open
!= NULL
)
2568 int fd
= t
->to_fileio_open (t
, filename
, flags
, mode
, target_errno
);
2571 fprintf_unfiltered (gdb_stdlog
,
2572 "target_fileio_open (%s,0x%x,0%o) = %d (%d)\n",
2573 filename
, flags
, mode
,
2574 fd
, fd
!= -1 ? 0 : *target_errno
);
2579 *target_errno
= FILEIO_ENOSYS
;
2583 /* Write up to LEN bytes from WRITE_BUF to FD on the target.
2584 Return the number of bytes written, or -1 if an error occurs
2585 (and set *TARGET_ERRNO). */
2587 target_fileio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
2588 ULONGEST offset
, int *target_errno
)
2590 struct target_ops
*t
;
2592 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
2594 if (t
->to_fileio_pwrite
!= NULL
)
2596 int ret
= t
->to_fileio_pwrite (t
, fd
, write_buf
, len
, offset
,
2600 fprintf_unfiltered (gdb_stdlog
,
2601 "target_fileio_pwrite (%d,...,%d,%s) "
2603 fd
, len
, pulongest (offset
),
2604 ret
, ret
!= -1 ? 0 : *target_errno
);
2609 *target_errno
= FILEIO_ENOSYS
;
2613 /* Read up to LEN bytes FD on the target into READ_BUF.
2614 Return the number of bytes read, or -1 if an error occurs
2615 (and set *TARGET_ERRNO). */
2617 target_fileio_pread (int fd
, gdb_byte
*read_buf
, int len
,
2618 ULONGEST offset
, int *target_errno
)
2620 struct target_ops
*t
;
2622 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
2624 if (t
->to_fileio_pread
!= NULL
)
2626 int ret
= t
->to_fileio_pread (t
, fd
, read_buf
, len
, offset
,
2630 fprintf_unfiltered (gdb_stdlog
,
2631 "target_fileio_pread (%d,...,%d,%s) "
2633 fd
, len
, pulongest (offset
),
2634 ret
, ret
!= -1 ? 0 : *target_errno
);
2639 *target_errno
= FILEIO_ENOSYS
;
2643 /* Close FD on the target. Return 0, or -1 if an error occurs
2644 (and set *TARGET_ERRNO). */
2646 target_fileio_close (int fd
, int *target_errno
)
2648 struct target_ops
*t
;
2650 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
2652 if (t
->to_fileio_close
!= NULL
)
2654 int ret
= t
->to_fileio_close (t
, fd
, target_errno
);
2657 fprintf_unfiltered (gdb_stdlog
,
2658 "target_fileio_close (%d) = %d (%d)\n",
2659 fd
, ret
, ret
!= -1 ? 0 : *target_errno
);
2664 *target_errno
= FILEIO_ENOSYS
;
2668 /* Unlink FILENAME on the target. Return 0, or -1 if an error
2669 occurs (and set *TARGET_ERRNO). */
2671 target_fileio_unlink (const char *filename
, int *target_errno
)
2673 struct target_ops
*t
;
2675 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
2677 if (t
->to_fileio_unlink
!= NULL
)
2679 int ret
= t
->to_fileio_unlink (t
, filename
, target_errno
);
2682 fprintf_unfiltered (gdb_stdlog
,
2683 "target_fileio_unlink (%s) = %d (%d)\n",
2684 filename
, ret
, ret
!= -1 ? 0 : *target_errno
);
2689 *target_errno
= FILEIO_ENOSYS
;
2693 /* Read value of symbolic link FILENAME on the target. Return a
2694 null-terminated string allocated via xmalloc, or NULL if an error
2695 occurs (and set *TARGET_ERRNO). */
2697 target_fileio_readlink (const char *filename
, int *target_errno
)
2699 struct target_ops
*t
;
2701 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
2703 if (t
->to_fileio_readlink
!= NULL
)
2705 char *ret
= t
->to_fileio_readlink (t
, filename
, target_errno
);
2708 fprintf_unfiltered (gdb_stdlog
,
2709 "target_fileio_readlink (%s) = %s (%d)\n",
2710 filename
, ret
? ret
: "(nil)",
2711 ret
? 0 : *target_errno
);
2716 *target_errno
= FILEIO_ENOSYS
;
2721 target_fileio_close_cleanup (void *opaque
)
2723 int fd
= *(int *) opaque
;
2726 target_fileio_close (fd
, &target_errno
);
2729 /* Read target file FILENAME. Store the result in *BUF_P and
2730 return the size of the transferred data. PADDING additional bytes are
2731 available in *BUF_P. This is a helper function for
2732 target_fileio_read_alloc; see the declaration of that function for more
2736 target_fileio_read_alloc_1 (const char *filename
,
2737 gdb_byte
**buf_p
, int padding
)
2739 struct cleanup
*close_cleanup
;
2740 size_t buf_alloc
, buf_pos
;
2746 fd
= target_fileio_open (filename
, FILEIO_O_RDONLY
, 0700, &target_errno
);
2750 close_cleanup
= make_cleanup (target_fileio_close_cleanup
, &fd
);
2752 /* Start by reading up to 4K at a time. The target will throttle
2753 this number down if necessary. */
2755 buf
= xmalloc (buf_alloc
);
2759 n
= target_fileio_pread (fd
, &buf
[buf_pos
],
2760 buf_alloc
- buf_pos
- padding
, buf_pos
,
2764 /* An error occurred. */
2765 do_cleanups (close_cleanup
);
2771 /* Read all there was. */
2772 do_cleanups (close_cleanup
);
2782 /* If the buffer is filling up, expand it. */
2783 if (buf_alloc
< buf_pos
* 2)
2786 buf
= xrealloc (buf
, buf_alloc
);
2793 /* Read target file FILENAME. Store the result in *BUF_P and return
2794 the size of the transferred data. See the declaration in "target.h"
2795 function for more information about the return value. */
2798 target_fileio_read_alloc (const char *filename
, gdb_byte
**buf_p
)
2800 return target_fileio_read_alloc_1 (filename
, buf_p
, 0);
2803 /* Read target file FILENAME. The result is NUL-terminated and
2804 returned as a string, allocated using xmalloc. If an error occurs
2805 or the transfer is unsupported, NULL is returned. Empty objects
2806 are returned as allocated but empty strings. A warning is issued
2807 if the result contains any embedded NUL bytes. */
2810 target_fileio_read_stralloc (const char *filename
)
2814 LONGEST i
, transferred
;
2816 transferred
= target_fileio_read_alloc_1 (filename
, &buffer
, 1);
2817 bufstr
= (char *) buffer
;
2819 if (transferred
< 0)
2822 if (transferred
== 0)
2823 return xstrdup ("");
2825 bufstr
[transferred
] = 0;
2827 /* Check for embedded NUL bytes; but allow trailing NULs. */
2828 for (i
= strlen (bufstr
); i
< transferred
; i
++)
2831 warning (_("target file %s "
2832 "contained unexpected null characters"),
2842 default_region_ok_for_hw_watchpoint (struct target_ops
*self
,
2843 CORE_ADDR addr
, int len
)
2845 return (len
<= gdbarch_ptr_bit (target_gdbarch ()) / TARGET_CHAR_BIT
);
2849 default_watchpoint_addr_within_range (struct target_ops
*target
,
2851 CORE_ADDR start
, int length
)
2853 return addr
>= start
&& addr
< start
+ length
;
2856 static struct gdbarch
*
2857 default_thread_architecture (struct target_ops
*ops
, ptid_t ptid
)
2859 return target_gdbarch ();
2863 return_zero (struct target_ops
*ignore
)
2869 return_zero_has_execution (struct target_ops
*ignore
, ptid_t ignore2
)
2875 * Find the next target down the stack from the specified target.
2879 find_target_beneath (struct target_ops
*t
)
2887 find_target_at (enum strata stratum
)
2889 struct target_ops
*t
;
2891 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2892 if (t
->to_stratum
== stratum
)
2899 /* The inferior process has died. Long live the inferior! */
2902 generic_mourn_inferior (void)
2906 ptid
= inferior_ptid
;
2907 inferior_ptid
= null_ptid
;
2909 /* Mark breakpoints uninserted in case something tries to delete a
2910 breakpoint while we delete the inferior's threads (which would
2911 fail, since the inferior is long gone). */
2912 mark_breakpoints_out ();
2914 if (!ptid_equal (ptid
, null_ptid
))
2916 int pid
= ptid_get_pid (ptid
);
2917 exit_inferior (pid
);
2920 /* Note this wipes step-resume breakpoints, so needs to be done
2921 after exit_inferior, which ends up referencing the step-resume
2922 breakpoints through clear_thread_inferior_resources. */
2923 breakpoint_init_inferior (inf_exited
);
2925 registers_changed ();
2927 reopen_exec_file ();
2928 reinit_frame_cache ();
2930 if (deprecated_detach_hook
)
2931 deprecated_detach_hook ();
2934 /* Convert a normal process ID to a string. Returns the string in a
2938 normal_pid_to_str (ptid_t ptid
)
2940 static char buf
[32];
2942 xsnprintf (buf
, sizeof buf
, "process %d", ptid_get_pid (ptid
));
2947 default_pid_to_str (struct target_ops
*ops
, ptid_t ptid
)
2949 return normal_pid_to_str (ptid
);
2952 /* Error-catcher for target_find_memory_regions. */
2954 dummy_find_memory_regions (struct target_ops
*self
,
2955 find_memory_region_ftype ignore1
, void *ignore2
)
2957 error (_("Command not implemented for this target."));
2961 /* Error-catcher for target_make_corefile_notes. */
2963 dummy_make_corefile_notes (struct target_ops
*self
,
2964 bfd
*ignore1
, int *ignore2
)
2966 error (_("Command not implemented for this target."));
2970 /* Set up the handful of non-empty slots needed by the dummy target
2974 init_dummy_target (void)
2976 dummy_target
.to_shortname
= "None";
2977 dummy_target
.to_longname
= "None";
2978 dummy_target
.to_doc
= "";
2979 dummy_target
.to_supports_disable_randomization
2980 = find_default_supports_disable_randomization
;
2981 dummy_target
.to_stratum
= dummy_stratum
;
2982 dummy_target
.to_has_all_memory
= return_zero
;
2983 dummy_target
.to_has_memory
= return_zero
;
2984 dummy_target
.to_has_stack
= return_zero
;
2985 dummy_target
.to_has_registers
= return_zero
;
2986 dummy_target
.to_has_execution
= return_zero_has_execution
;
2987 dummy_target
.to_magic
= OPS_MAGIC
;
2989 install_dummy_methods (&dummy_target
);
2994 target_close (struct target_ops
*targ
)
2996 gdb_assert (!target_is_pushed (targ
));
2998 if (targ
->to_xclose
!= NULL
)
2999 targ
->to_xclose (targ
);
3000 else if (targ
->to_close
!= NULL
)
3001 targ
->to_close (targ
);
3004 fprintf_unfiltered (gdb_stdlog
, "target_close ()\n");
3008 target_thread_alive (ptid_t ptid
)
3010 return current_target
.to_thread_alive (¤t_target
, ptid
);
3014 target_find_new_threads (void)
3016 current_target
.to_find_new_threads (¤t_target
);
3020 target_stop (ptid_t ptid
)
3024 warning (_("May not interrupt or stop the target, ignoring attempt"));
3028 (*current_target
.to_stop
) (¤t_target
, ptid
);
3031 /* Concatenate ELEM to LIST, a comma separate list, and return the
3032 result. The LIST incoming argument is released. */
3035 str_comma_list_concat_elem (char *list
, const char *elem
)
3038 return xstrdup (elem
);
3040 return reconcat (list
, list
, ", ", elem
, (char *) NULL
);
3043 /* Helper for target_options_to_string. If OPT is present in
3044 TARGET_OPTIONS, append the OPT_STR (string version of OPT) in RET.
3045 Returns the new resulting string. OPT is removed from
3049 do_option (int *target_options
, char *ret
,
3050 int opt
, char *opt_str
)
3052 if ((*target_options
& opt
) != 0)
3054 ret
= str_comma_list_concat_elem (ret
, opt_str
);
3055 *target_options
&= ~opt
;
3062 target_options_to_string (int target_options
)
3066 #define DO_TARG_OPTION(OPT) \
3067 ret = do_option (&target_options, ret, OPT, #OPT)
3069 DO_TARG_OPTION (TARGET_WNOHANG
);
3071 if (target_options
!= 0)
3072 ret
= str_comma_list_concat_elem (ret
, "unknown???");
3080 debug_print_register (const char * func
,
3081 struct regcache
*regcache
, int regno
)
3083 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
3085 fprintf_unfiltered (gdb_stdlog
, "%s ", func
);
3086 if (regno
>= 0 && regno
< gdbarch_num_regs (gdbarch
)
3087 && gdbarch_register_name (gdbarch
, regno
) != NULL
3088 && gdbarch_register_name (gdbarch
, regno
)[0] != '\0')
3089 fprintf_unfiltered (gdb_stdlog
, "(%s)",
3090 gdbarch_register_name (gdbarch
, regno
));
3092 fprintf_unfiltered (gdb_stdlog
, "(%d)", regno
);
3093 if (regno
>= 0 && regno
< gdbarch_num_regs (gdbarch
))
3095 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
3096 int i
, size
= register_size (gdbarch
, regno
);
3097 gdb_byte buf
[MAX_REGISTER_SIZE
];
3099 regcache_raw_collect (regcache
, regno
, buf
);
3100 fprintf_unfiltered (gdb_stdlog
, " = ");
3101 for (i
= 0; i
< size
; i
++)
3103 fprintf_unfiltered (gdb_stdlog
, "%02x", buf
[i
]);
3105 if (size
<= sizeof (LONGEST
))
3107 ULONGEST val
= extract_unsigned_integer (buf
, size
, byte_order
);
3109 fprintf_unfiltered (gdb_stdlog
, " %s %s",
3110 core_addr_to_string_nz (val
), plongest (val
));
3113 fprintf_unfiltered (gdb_stdlog
, "\n");
3117 target_fetch_registers (struct regcache
*regcache
, int regno
)
3119 current_target
.to_fetch_registers (¤t_target
, regcache
, regno
);
3121 debug_print_register ("target_fetch_registers", regcache
, regno
);
3125 target_store_registers (struct regcache
*regcache
, int regno
)
3127 struct target_ops
*t
;
3129 if (!may_write_registers
)
3130 error (_("Writing to registers is not allowed (regno %d)"), regno
);
3132 current_target
.to_store_registers (¤t_target
, regcache
, regno
);
3135 debug_print_register ("target_store_registers", regcache
, regno
);
3140 target_core_of_thread (ptid_t ptid
)
3142 return current_target
.to_core_of_thread (¤t_target
, ptid
);
3146 simple_verify_memory (struct target_ops
*ops
,
3147 const gdb_byte
*data
, CORE_ADDR lma
, ULONGEST size
)
3149 LONGEST total_xfered
= 0;
3151 while (total_xfered
< size
)
3153 ULONGEST xfered_len
;
3154 enum target_xfer_status status
;
3156 ULONGEST howmuch
= min (sizeof (buf
), size
- total_xfered
);
3158 status
= target_xfer_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
3159 buf
, NULL
, lma
+ total_xfered
, howmuch
,
3161 if (status
== TARGET_XFER_OK
3162 && memcmp (data
+ total_xfered
, buf
, xfered_len
) == 0)
3164 total_xfered
+= xfered_len
;
3173 /* Default implementation of memory verification. */
3176 default_verify_memory (struct target_ops
*self
,
3177 const gdb_byte
*data
, CORE_ADDR memaddr
, ULONGEST size
)
3179 /* Start over from the top of the target stack. */
3180 return simple_verify_memory (current_target
.beneath
,
3181 data
, memaddr
, size
);
3185 target_verify_memory (const gdb_byte
*data
, CORE_ADDR memaddr
, ULONGEST size
)
3187 return current_target
.to_verify_memory (¤t_target
,
3188 data
, memaddr
, size
);
3191 /* The documentation for this function is in its prototype declaration in
3195 target_insert_mask_watchpoint (CORE_ADDR addr
, CORE_ADDR mask
, int rw
)
3197 return current_target
.to_insert_mask_watchpoint (¤t_target
,
3201 /* The documentation for this function is in its prototype declaration in
3205 target_remove_mask_watchpoint (CORE_ADDR addr
, CORE_ADDR mask
, int rw
)
3207 return current_target
.to_remove_mask_watchpoint (¤t_target
,
3211 /* The documentation for this function is in its prototype declaration
3215 target_masked_watch_num_registers (CORE_ADDR addr
, CORE_ADDR mask
)
3217 return current_target
.to_masked_watch_num_registers (¤t_target
,
3221 /* The documentation for this function is in its prototype declaration
3225 target_ranged_break_num_registers (void)
3227 return current_target
.to_ranged_break_num_registers (¤t_target
);
3232 struct btrace_target_info
*
3233 target_enable_btrace (ptid_t ptid
)
3235 return current_target
.to_enable_btrace (¤t_target
, ptid
);
3241 target_disable_btrace (struct btrace_target_info
*btinfo
)
3243 current_target
.to_disable_btrace (¤t_target
, btinfo
);
3249 target_teardown_btrace (struct btrace_target_info
*btinfo
)
3251 current_target
.to_teardown_btrace (¤t_target
, btinfo
);
3257 target_read_btrace (VEC (btrace_block_s
) **btrace
,
3258 struct btrace_target_info
*btinfo
,
3259 enum btrace_read_type type
)
3261 return current_target
.to_read_btrace (¤t_target
, btrace
, btinfo
, type
);
3267 target_stop_recording (void)
3269 current_target
.to_stop_recording (¤t_target
);
3275 target_save_record (const char *filename
)
3277 current_target
.to_save_record (¤t_target
, filename
);
3283 target_supports_delete_record (void)
3285 struct target_ops
*t
;
3287 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3288 if (t
->to_delete_record
!= delegate_delete_record
3289 && t
->to_delete_record
!= tdefault_delete_record
)
3298 target_delete_record (void)
3300 current_target
.to_delete_record (¤t_target
);
3306 target_record_is_replaying (void)
3308 return current_target
.to_record_is_replaying (¤t_target
);
3314 target_goto_record_begin (void)
3316 current_target
.to_goto_record_begin (¤t_target
);
3322 target_goto_record_end (void)
3324 current_target
.to_goto_record_end (¤t_target
);
3330 target_goto_record (ULONGEST insn
)
3332 current_target
.to_goto_record (¤t_target
, insn
);
3338 target_insn_history (int size
, int flags
)
3340 current_target
.to_insn_history (¤t_target
, size
, flags
);
3346 target_insn_history_from (ULONGEST from
, int size
, int flags
)
3348 current_target
.to_insn_history_from (¤t_target
, from
, size
, flags
);
3354 target_insn_history_range (ULONGEST begin
, ULONGEST end
, int flags
)
3356 current_target
.to_insn_history_range (¤t_target
, begin
, end
, flags
);
3362 target_call_history (int size
, int flags
)
3364 current_target
.to_call_history (¤t_target
, size
, flags
);
3370 target_call_history_from (ULONGEST begin
, int size
, int flags
)
3372 current_target
.to_call_history_from (¤t_target
, begin
, size
, flags
);
3378 target_call_history_range (ULONGEST begin
, ULONGEST end
, int flags
)
3380 current_target
.to_call_history_range (¤t_target
, begin
, end
, flags
);
3385 const struct frame_unwind
*
3386 target_get_unwinder (void)
3388 return current_target
.to_get_unwinder (¤t_target
);
3393 const struct frame_unwind
*
3394 target_get_tailcall_unwinder (void)
3396 return current_target
.to_get_tailcall_unwinder (¤t_target
);
3399 /* Default implementation of to_decr_pc_after_break. */
3402 default_target_decr_pc_after_break (struct target_ops
*ops
,
3403 struct gdbarch
*gdbarch
)
3405 return gdbarch_decr_pc_after_break (gdbarch
);
3411 target_decr_pc_after_break (struct gdbarch
*gdbarch
)
3413 return current_target
.to_decr_pc_after_break (¤t_target
, gdbarch
);
3419 target_prepare_to_generate_core (void)
3421 current_target
.to_prepare_to_generate_core (¤t_target
);
3427 target_done_generating_core (void)
3429 current_target
.to_done_generating_core (¤t_target
);
3433 setup_target_debug (void)
3435 memcpy (&debug_target
, ¤t_target
, sizeof debug_target
);
3437 init_debug_target (¤t_target
);
3441 static char targ_desc
[] =
3442 "Names of targets and files being debugged.\nShows the entire \
3443 stack of targets currently in use (including the exec-file,\n\
3444 core-file, and process, if any), as well as the symbol file name.";
3447 default_rcmd (struct target_ops
*self
, const char *command
,
3448 struct ui_file
*output
)
3450 error (_("\"monitor\" command not supported by this target."));
3454 do_monitor_command (char *cmd
,
3457 target_rcmd (cmd
, gdb_stdtarg
);
3460 /* Print the name of each layers of our target stack. */
3463 maintenance_print_target_stack (char *cmd
, int from_tty
)
3465 struct target_ops
*t
;
3467 printf_filtered (_("The current target stack is:\n"));
3469 for (t
= target_stack
; t
!= NULL
; t
= t
->beneath
)
3471 printf_filtered (" - %s (%s)\n", t
->to_shortname
, t
->to_longname
);
3475 /* Controls if targets can report that they can/are async. This is
3476 just for maintainers to use when debugging gdb. */
3477 int target_async_permitted
= 1;
3479 /* The set command writes to this variable. If the inferior is
3480 executing, target_async_permitted is *not* updated. */
3481 static int target_async_permitted_1
= 1;
3484 maint_set_target_async_command (char *args
, int from_tty
,
3485 struct cmd_list_element
*c
)
3487 if (have_live_inferiors ())
3489 target_async_permitted_1
= target_async_permitted
;
3490 error (_("Cannot change this setting while the inferior is running."));
3493 target_async_permitted
= target_async_permitted_1
;
3497 maint_show_target_async_command (struct ui_file
*file
, int from_tty
,
3498 struct cmd_list_element
*c
,
3501 fprintf_filtered (file
,
3502 _("Controlling the inferior in "
3503 "asynchronous mode is %s.\n"), value
);
3506 /* Temporary copies of permission settings. */
3508 static int may_write_registers_1
= 1;
3509 static int may_write_memory_1
= 1;
3510 static int may_insert_breakpoints_1
= 1;
3511 static int may_insert_tracepoints_1
= 1;
3512 static int may_insert_fast_tracepoints_1
= 1;
3513 static int may_stop_1
= 1;
3515 /* Make the user-set values match the real values again. */
3518 update_target_permissions (void)
3520 may_write_registers_1
= may_write_registers
;
3521 may_write_memory_1
= may_write_memory
;
3522 may_insert_breakpoints_1
= may_insert_breakpoints
;
3523 may_insert_tracepoints_1
= may_insert_tracepoints
;
3524 may_insert_fast_tracepoints_1
= may_insert_fast_tracepoints
;
3525 may_stop_1
= may_stop
;
3528 /* The one function handles (most of) the permission flags in the same
3532 set_target_permissions (char *args
, int from_tty
,
3533 struct cmd_list_element
*c
)
3535 if (target_has_execution
)
3537 update_target_permissions ();
3538 error (_("Cannot change this setting while the inferior is running."));
3541 /* Make the real values match the user-changed values. */
3542 may_write_registers
= may_write_registers_1
;
3543 may_insert_breakpoints
= may_insert_breakpoints_1
;
3544 may_insert_tracepoints
= may_insert_tracepoints_1
;
3545 may_insert_fast_tracepoints
= may_insert_fast_tracepoints_1
;
3546 may_stop
= may_stop_1
;
3547 update_observer_mode ();
3550 /* Set memory write permission independently of observer mode. */
3553 set_write_memory_permission (char *args
, int from_tty
,
3554 struct cmd_list_element
*c
)
3556 /* Make the real values match the user-changed values. */
3557 may_write_memory
= may_write_memory_1
;
3558 update_observer_mode ();
3563 initialize_targets (void)
3565 init_dummy_target ();
3566 push_target (&dummy_target
);
3568 add_info ("target", target_info
, targ_desc
);
3569 add_info ("files", target_info
, targ_desc
);
3571 add_setshow_zuinteger_cmd ("target", class_maintenance
, &targetdebug
, _("\
3572 Set target debugging."), _("\
3573 Show target debugging."), _("\
3574 When non-zero, target debugging is enabled. Higher numbers are more\n\
3578 &setdebuglist
, &showdebuglist
);
3580 add_setshow_boolean_cmd ("trust-readonly-sections", class_support
,
3581 &trust_readonly
, _("\
3582 Set mode for reading from readonly sections."), _("\
3583 Show mode for reading from readonly sections."), _("\
3584 When this mode is on, memory reads from readonly sections (such as .text)\n\
3585 will be read from the object file instead of from the target. This will\n\
3586 result in significant performance improvement for remote targets."),
3588 show_trust_readonly
,
3589 &setlist
, &showlist
);
3591 add_com ("monitor", class_obscure
, do_monitor_command
,
3592 _("Send a command to the remote monitor (remote targets only)."));
3594 add_cmd ("target-stack", class_maintenance
, maintenance_print_target_stack
,
3595 _("Print the name of each layer of the internal target stack."),
3596 &maintenanceprintlist
);
3598 add_setshow_boolean_cmd ("target-async", no_class
,
3599 &target_async_permitted_1
, _("\
3600 Set whether gdb controls the inferior in asynchronous mode."), _("\
3601 Show whether gdb controls the inferior in asynchronous mode."), _("\
3602 Tells gdb whether to control the inferior in asynchronous mode."),
3603 maint_set_target_async_command
,
3604 maint_show_target_async_command
,
3605 &maintenance_set_cmdlist
,
3606 &maintenance_show_cmdlist
);
3608 add_setshow_boolean_cmd ("may-write-registers", class_support
,
3609 &may_write_registers_1
, _("\
3610 Set permission to write into registers."), _("\
3611 Show permission to write into registers."), _("\
3612 When this permission is on, GDB may write into the target's registers.\n\
3613 Otherwise, any sort of write attempt will result in an error."),
3614 set_target_permissions
, NULL
,
3615 &setlist
, &showlist
);
3617 add_setshow_boolean_cmd ("may-write-memory", class_support
,
3618 &may_write_memory_1
, _("\
3619 Set permission to write into target memory."), _("\
3620 Show permission to write into target memory."), _("\
3621 When this permission is on, GDB may write into the target's memory.\n\
3622 Otherwise, any sort of write attempt will result in an error."),
3623 set_write_memory_permission
, NULL
,
3624 &setlist
, &showlist
);
3626 add_setshow_boolean_cmd ("may-insert-breakpoints", class_support
,
3627 &may_insert_breakpoints_1
, _("\
3628 Set permission to insert breakpoints in the target."), _("\
3629 Show permission to insert breakpoints in the target."), _("\
3630 When this permission is on, GDB may insert breakpoints in the program.\n\
3631 Otherwise, any sort of insertion attempt will result in an error."),
3632 set_target_permissions
, NULL
,
3633 &setlist
, &showlist
);
3635 add_setshow_boolean_cmd ("may-insert-tracepoints", class_support
,
3636 &may_insert_tracepoints_1
, _("\
3637 Set permission to insert tracepoints in the target."), _("\
3638 Show permission to insert tracepoints in the target."), _("\
3639 When this permission is on, GDB may insert tracepoints in the program.\n\
3640 Otherwise, any sort of insertion attempt will result in an error."),
3641 set_target_permissions
, NULL
,
3642 &setlist
, &showlist
);
3644 add_setshow_boolean_cmd ("may-insert-fast-tracepoints", class_support
,
3645 &may_insert_fast_tracepoints_1
, _("\
3646 Set permission to insert fast tracepoints in the target."), _("\
3647 Show permission to insert fast tracepoints in the target."), _("\
3648 When this permission is on, GDB may insert fast tracepoints.\n\
3649 Otherwise, any sort of insertion attempt will result in an error."),
3650 set_target_permissions
, NULL
,
3651 &setlist
, &showlist
);
3653 add_setshow_boolean_cmd ("may-interrupt", class_support
,
3655 Set permission to interrupt or signal the target."), _("\
3656 Show permission to interrupt or signal the target."), _("\
3657 When this permission is on, GDB may interrupt/stop the target's execution.\n\
3658 Otherwise, any attempt to interrupt or stop will be ignored."),
3659 set_target_permissions
, NULL
,
3660 &setlist
, &showlist
);
3662 add_setshow_boolean_cmd ("auto-connect-native-target", class_support
,
3663 &auto_connect_native_target
, _("\
3664 Set whether GDB may automatically connect to the native target."), _("\
3665 Show whether GDB may automatically connect to the native target."), _("\
3666 When on, and GDB is not connected to a target yet, GDB\n\
3667 attempts \"run\" and other commands with the native target."),
3668 NULL
, show_auto_connect_native_target
,
3669 &setlist
, &showlist
);