1 /* Select target systems and architectures at runtime for GDB.
3 Copyright (C) 1990-2016 Free Software Foundation, Inc.
5 Contributed by Cygnus Support.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
24 #include "target-dcache.h"
36 #include "target-descriptions.h"
37 #include "gdbthread.h"
40 #include "inline-frame.h"
41 #include "tracepoint.h"
42 #include "gdb/fileio.h"
45 #include "target-debug.h"
47 #include "event-top.h"
49 static void target_info (char *, int);
51 static void generic_tls_error (void) ATTRIBUTE_NORETURN
;
53 static void default_terminal_info (struct target_ops
*, const char *, int);
55 static int default_watchpoint_addr_within_range (struct target_ops
*,
56 CORE_ADDR
, CORE_ADDR
, int);
58 static int default_region_ok_for_hw_watchpoint (struct target_ops
*,
61 static void default_rcmd (struct target_ops
*, const char *, struct ui_file
*);
63 static ptid_t
default_get_ada_task_ptid (struct target_ops
*self
,
66 static int default_follow_fork (struct target_ops
*self
, int follow_child
,
69 static void default_mourn_inferior (struct target_ops
*self
);
71 static int default_search_memory (struct target_ops
*ops
,
73 ULONGEST search_space_len
,
74 const gdb_byte
*pattern
,
76 CORE_ADDR
*found_addrp
);
78 static int default_verify_memory (struct target_ops
*self
,
80 CORE_ADDR memaddr
, ULONGEST size
);
82 static struct address_space
*default_thread_address_space
83 (struct target_ops
*self
, ptid_t ptid
);
85 static void tcomplain (void) ATTRIBUTE_NORETURN
;
87 static int return_zero (struct target_ops
*);
89 static int return_zero_has_execution (struct target_ops
*, ptid_t
);
91 static void target_command (char *, int);
93 static struct target_ops
*find_default_run_target (char *);
95 static struct gdbarch
*default_thread_architecture (struct target_ops
*ops
,
98 static int dummy_find_memory_regions (struct target_ops
*self
,
99 find_memory_region_ftype ignore1
,
102 static char *dummy_make_corefile_notes (struct target_ops
*self
,
103 bfd
*ignore1
, int *ignore2
);
105 static char *default_pid_to_str (struct target_ops
*ops
, ptid_t ptid
);
107 static enum exec_direction_kind default_execution_direction
108 (struct target_ops
*self
);
110 static struct target_ops debug_target
;
112 #include "target-delegates.c"
114 static void init_dummy_target (void);
116 static void update_current_target (void);
118 /* Vector of existing target structures. */
119 typedef struct target_ops
*target_ops_p
;
120 DEF_VEC_P (target_ops_p
);
121 static VEC (target_ops_p
) *target_structs
;
123 /* The initial current target, so that there is always a semi-valid
126 static struct target_ops dummy_target
;
128 /* Top of target stack. */
130 static struct target_ops
*target_stack
;
132 /* The target structure we are currently using to talk to a process
133 or file or whatever "inferior" we have. */
135 struct target_ops current_target
;
137 /* Command list for target. */
139 static struct cmd_list_element
*targetlist
= NULL
;
141 /* Nonzero if we should trust readonly sections from the
142 executable when reading memory. */
144 static int trust_readonly
= 0;
146 /* Nonzero if we should show true memory content including
147 memory breakpoint inserted by gdb. */
149 static int show_memory_breakpoints
= 0;
151 /* These globals control whether GDB attempts to perform these
152 operations; they are useful for targets that need to prevent
153 inadvertant disruption, such as in non-stop mode. */
155 int may_write_registers
= 1;
157 int may_write_memory
= 1;
159 int may_insert_breakpoints
= 1;
161 int may_insert_tracepoints
= 1;
163 int may_insert_fast_tracepoints
= 1;
167 /* Non-zero if we want to see trace of target level stuff. */
169 static unsigned int targetdebug
= 0;
172 set_targetdebug (char *args
, int from_tty
, struct cmd_list_element
*c
)
174 update_current_target ();
178 show_targetdebug (struct ui_file
*file
, int from_tty
,
179 struct cmd_list_element
*c
, const char *value
)
181 fprintf_filtered (file
, _("Target debugging is %s.\n"), value
);
184 static void setup_target_debug (void);
186 /* The user just typed 'target' without the name of a target. */
189 target_command (char *arg
, int from_tty
)
191 fputs_filtered ("Argument required (target name). Try `help target'\n",
195 /* Default target_has_* methods for process_stratum targets. */
198 default_child_has_all_memory (struct target_ops
*ops
)
200 /* If no inferior selected, then we can't read memory here. */
201 if (ptid_equal (inferior_ptid
, null_ptid
))
208 default_child_has_memory (struct target_ops
*ops
)
210 /* If no inferior selected, then we can't read memory here. */
211 if (ptid_equal (inferior_ptid
, null_ptid
))
218 default_child_has_stack (struct target_ops
*ops
)
220 /* If no inferior selected, there's no stack. */
221 if (ptid_equal (inferior_ptid
, null_ptid
))
228 default_child_has_registers (struct target_ops
*ops
)
230 /* Can't read registers from no inferior. */
231 if (ptid_equal (inferior_ptid
, null_ptid
))
238 default_child_has_execution (struct target_ops
*ops
, ptid_t the_ptid
)
240 /* If there's no thread selected, then we can't make it run through
242 if (ptid_equal (the_ptid
, null_ptid
))
250 target_has_all_memory_1 (void)
252 struct target_ops
*t
;
254 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
255 if (t
->to_has_all_memory (t
))
262 target_has_memory_1 (void)
264 struct target_ops
*t
;
266 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
267 if (t
->to_has_memory (t
))
274 target_has_stack_1 (void)
276 struct target_ops
*t
;
278 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
279 if (t
->to_has_stack (t
))
286 target_has_registers_1 (void)
288 struct target_ops
*t
;
290 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
291 if (t
->to_has_registers (t
))
298 target_has_execution_1 (ptid_t the_ptid
)
300 struct target_ops
*t
;
302 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
303 if (t
->to_has_execution (t
, the_ptid
))
310 target_has_execution_current (void)
312 return target_has_execution_1 (inferior_ptid
);
315 /* Complete initialization of T. This ensures that various fields in
316 T are set, if needed by the target implementation. */
319 complete_target_initialization (struct target_ops
*t
)
321 /* Provide default values for all "must have" methods. */
323 if (t
->to_has_all_memory
== NULL
)
324 t
->to_has_all_memory
= return_zero
;
326 if (t
->to_has_memory
== NULL
)
327 t
->to_has_memory
= return_zero
;
329 if (t
->to_has_stack
== NULL
)
330 t
->to_has_stack
= return_zero
;
332 if (t
->to_has_registers
== NULL
)
333 t
->to_has_registers
= return_zero
;
335 if (t
->to_has_execution
== NULL
)
336 t
->to_has_execution
= return_zero_has_execution
;
338 /* These methods can be called on an unpushed target and so require
339 a default implementation if the target might plausibly be the
340 default run target. */
341 gdb_assert (t
->to_can_run
== NULL
|| (t
->to_can_async_p
!= NULL
342 && t
->to_supports_non_stop
!= NULL
));
344 install_delegators (t
);
347 /* This is used to implement the various target commands. */
350 open_target (char *args
, int from_tty
, struct cmd_list_element
*command
)
352 struct target_ops
*ops
= (struct target_ops
*) get_cmd_context (command
);
355 fprintf_unfiltered (gdb_stdlog
, "-> %s->to_open (...)\n",
358 ops
->to_open (args
, from_tty
);
361 fprintf_unfiltered (gdb_stdlog
, "<- %s->to_open (%s, %d)\n",
362 ops
->to_shortname
, args
, from_tty
);
365 /* Add possible target architecture T to the list and add a new
366 command 'target T->to_shortname'. Set COMPLETER as the command's
367 completer if not NULL. */
370 add_target_with_completer (struct target_ops
*t
,
371 completer_ftype
*completer
)
373 struct cmd_list_element
*c
;
375 complete_target_initialization (t
);
377 VEC_safe_push (target_ops_p
, target_structs
, t
);
379 if (targetlist
== NULL
)
380 add_prefix_cmd ("target", class_run
, target_command
, _("\
381 Connect to a target machine or process.\n\
382 The first argument is the type or protocol of the target machine.\n\
383 Remaining arguments are interpreted by the target protocol. For more\n\
384 information on the arguments for a particular protocol, type\n\
385 `help target ' followed by the protocol name."),
386 &targetlist
, "target ", 0, &cmdlist
);
387 c
= add_cmd (t
->to_shortname
, no_class
, NULL
, t
->to_doc
, &targetlist
);
388 set_cmd_sfunc (c
, open_target
);
389 set_cmd_context (c
, t
);
390 if (completer
!= NULL
)
391 set_cmd_completer (c
, completer
);
394 /* Add a possible target architecture to the list. */
397 add_target (struct target_ops
*t
)
399 add_target_with_completer (t
, NULL
);
405 add_deprecated_target_alias (struct target_ops
*t
, char *alias
)
407 struct cmd_list_element
*c
;
410 /* If we use add_alias_cmd, here, we do not get the deprecated warning,
412 c
= add_cmd (alias
, no_class
, NULL
, t
->to_doc
, &targetlist
);
413 set_cmd_sfunc (c
, open_target
);
414 set_cmd_context (c
, t
);
415 alt
= xstrprintf ("target %s", t
->to_shortname
);
416 deprecate_cmd (c
, alt
);
424 current_target
.to_kill (¤t_target
);
428 target_load (const char *arg
, int from_tty
)
430 target_dcache_invalidate ();
431 (*current_target
.to_load
) (¤t_target
, arg
, from_tty
);
434 /* Possible terminal states. */
438 /* The inferior's terminal settings are in effect. */
439 terminal_is_inferior
= 0,
441 /* Some of our terminal settings are in effect, enough to get
443 terminal_is_ours_for_output
= 1,
445 /* Our terminal settings are in effect, for output and input. */
449 static enum terminal_state terminal_state
= terminal_is_ours
;
454 target_terminal_init (void)
456 (*current_target
.to_terminal_init
) (¤t_target
);
458 terminal_state
= terminal_is_ours
;
464 target_terminal_is_inferior (void)
466 return (terminal_state
== terminal_is_inferior
);
472 target_terminal_is_ours (void)
474 return (terminal_state
== terminal_is_ours
);
480 target_terminal_inferior (void)
482 struct ui
*ui
= current_ui
;
484 /* A background resume (``run&'') should leave GDB in control of the
486 if (ui
->prompt_state
!= PROMPT_BLOCKED
)
489 /* Since we always run the inferior in the main console (unless "set
490 inferior-tty" is in effect), when some UI other than the main one
491 calls target_terminal_inferior/target_terminal_inferior, then we
492 leave the main UI's terminal settings as is. */
496 if (terminal_state
== terminal_is_inferior
)
499 /* If GDB is resuming the inferior in the foreground, install
500 inferior's terminal modes. */
501 (*current_target
.to_terminal_inferior
) (¤t_target
);
502 terminal_state
= terminal_is_inferior
;
504 /* If the user hit C-c before, pretend that it was hit right
506 if (check_quit_flag ())
507 target_pass_ctrlc ();
513 target_terminal_ours (void)
515 struct ui
*ui
= current_ui
;
517 /* See target_terminal_inferior. */
521 if (terminal_state
== terminal_is_ours
)
524 (*current_target
.to_terminal_ours
) (¤t_target
);
525 terminal_state
= terminal_is_ours
;
531 target_terminal_ours_for_output (void)
533 struct ui
*ui
= current_ui
;
535 /* See target_terminal_inferior. */
539 if (terminal_state
!= terminal_is_inferior
)
541 (*current_target
.to_terminal_ours_for_output
) (¤t_target
);
542 terminal_state
= terminal_is_ours_for_output
;
548 target_supports_terminal_ours (void)
550 struct target_ops
*t
;
552 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
554 if (t
->to_terminal_ours
!= delegate_terminal_ours
555 && t
->to_terminal_ours
!= tdefault_terminal_ours
)
562 /* Restore the terminal to its previous state (helper for
563 make_cleanup_restore_target_terminal). */
566 cleanup_restore_target_terminal (void *arg
)
568 enum terminal_state
*previous_state
= (enum terminal_state
*) arg
;
570 switch (*previous_state
)
572 case terminal_is_ours
:
573 target_terminal_ours ();
575 case terminal_is_ours_for_output
:
576 target_terminal_ours_for_output ();
578 case terminal_is_inferior
:
579 target_terminal_inferior ();
587 make_cleanup_restore_target_terminal (void)
589 enum terminal_state
*ts
= XNEW (enum terminal_state
);
591 *ts
= terminal_state
;
593 return make_cleanup_dtor (cleanup_restore_target_terminal
, ts
, xfree
);
599 error (_("You can't do that when your target is `%s'"),
600 current_target
.to_shortname
);
606 error (_("You can't do that without a process to debug."));
610 default_terminal_info (struct target_ops
*self
, const char *args
, int from_tty
)
612 printf_unfiltered (_("No saved terminal information.\n"));
615 /* A default implementation for the to_get_ada_task_ptid target method.
617 This function builds the PTID by using both LWP and TID as part of
618 the PTID lwp and tid elements. The pid used is the pid of the
622 default_get_ada_task_ptid (struct target_ops
*self
, long lwp
, long tid
)
624 return ptid_build (ptid_get_pid (inferior_ptid
), lwp
, tid
);
627 static enum exec_direction_kind
628 default_execution_direction (struct target_ops
*self
)
630 if (!target_can_execute_reverse
)
632 else if (!target_can_async_p ())
635 gdb_assert_not_reached ("\
636 to_execution_direction must be implemented for reverse async");
639 /* Go through the target stack from top to bottom, copying over zero
640 entries in current_target, then filling in still empty entries. In
641 effect, we are doing class inheritance through the pushed target
644 NOTE: cagney/2003-10-17: The problem with this inheritance, as it
645 is currently implemented, is that it discards any knowledge of
646 which target an inherited method originally belonged to.
647 Consequently, new new target methods should instead explicitly and
648 locally search the target stack for the target that can handle the
652 update_current_target (void)
654 struct target_ops
*t
;
656 /* First, reset current's contents. */
657 memset (¤t_target
, 0, sizeof (current_target
));
659 /* Install the delegators. */
660 install_delegators (¤t_target
);
662 current_target
.to_stratum
= target_stack
->to_stratum
;
664 #define INHERIT(FIELD, TARGET) \
665 if (!current_target.FIELD) \
666 current_target.FIELD = (TARGET)->FIELD
668 /* Do not add any new INHERITs here. Instead, use the delegation
669 mechanism provided by make-target-delegates. */
670 for (t
= target_stack
; t
; t
= t
->beneath
)
672 INHERIT (to_shortname
, t
);
673 INHERIT (to_longname
, t
);
674 INHERIT (to_attach_no_wait
, t
);
675 INHERIT (to_have_steppable_watchpoint
, t
);
676 INHERIT (to_have_continuable_watchpoint
, t
);
677 INHERIT (to_has_thread_control
, t
);
681 /* Finally, position the target-stack beneath the squashed
682 "current_target". That way code looking for a non-inherited
683 target method can quickly and simply find it. */
684 current_target
.beneath
= target_stack
;
687 setup_target_debug ();
690 /* Push a new target type into the stack of the existing target accessors,
691 possibly superseding some of the existing accessors.
693 Rather than allow an empty stack, we always have the dummy target at
694 the bottom stratum, so we can call the function vectors without
698 push_target (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 /* Find the proper stratum to install this target in. */
714 for (cur
= &target_stack
; (*cur
) != NULL
; cur
= &(*cur
)->beneath
)
716 if ((int) (t
->to_stratum
) >= (int) (*cur
)->to_stratum
)
720 /* If there's already targets at this stratum, remove them. */
721 /* FIXME: cagney/2003-10-15: I think this should be popping all
722 targets to CUR, and not just those at this stratum level. */
723 while ((*cur
) != NULL
&& t
->to_stratum
== (*cur
)->to_stratum
)
725 /* There's already something at this stratum level. Close it,
726 and un-hook it from the stack. */
727 struct target_ops
*tmp
= (*cur
);
729 (*cur
) = (*cur
)->beneath
;
734 /* We have removed all targets in our stratum, now add the new one. */
738 update_current_target ();
741 /* Remove a target_ops vector from the stack, wherever it may be.
742 Return how many times it was removed (0 or 1). */
745 unpush_target (struct target_ops
*t
)
747 struct target_ops
**cur
;
748 struct target_ops
*tmp
;
750 if (t
->to_stratum
== dummy_stratum
)
751 internal_error (__FILE__
, __LINE__
,
752 _("Attempt to unpush the dummy target"));
754 /* Look for the specified target. Note that we assume that a target
755 can only occur once in the target stack. */
757 for (cur
= &target_stack
; (*cur
) != NULL
; cur
= &(*cur
)->beneath
)
763 /* If we don't find target_ops, quit. Only open targets should be
768 /* Unchain the target. */
770 (*cur
) = (*cur
)->beneath
;
773 update_current_target ();
775 /* Finally close the target. Note we do this after unchaining, so
776 any target method calls from within the target_close
777 implementation don't end up in T anymore. */
783 /* Unpush TARGET and assert that it worked. */
786 unpush_target_and_assert (struct target_ops
*target
)
788 if (!unpush_target (target
))
790 fprintf_unfiltered (gdb_stderr
,
791 "pop_all_targets couldn't find target %s\n",
792 target
->to_shortname
);
793 internal_error (__FILE__
, __LINE__
,
794 _("failed internal consistency check"));
799 pop_all_targets_above (enum strata above_stratum
)
801 while ((int) (current_target
.to_stratum
) > (int) above_stratum
)
802 unpush_target_and_assert (target_stack
);
808 pop_all_targets_at_and_above (enum strata stratum
)
810 while ((int) (current_target
.to_stratum
) >= (int) stratum
)
811 unpush_target_and_assert (target_stack
);
815 pop_all_targets (void)
817 pop_all_targets_above (dummy_stratum
);
820 /* Return 1 if T is now pushed in the target stack. Return 0 otherwise. */
823 target_is_pushed (struct target_ops
*t
)
825 struct target_ops
*cur
;
827 /* Check magic number. If wrong, it probably means someone changed
828 the struct definition, but not all the places that initialize one. */
829 if (t
->to_magic
!= OPS_MAGIC
)
831 fprintf_unfiltered (gdb_stderr
,
832 "Magic number of %s target struct wrong\n",
834 internal_error (__FILE__
, __LINE__
,
835 _("failed internal consistency check"));
838 for (cur
= target_stack
; cur
!= NULL
; cur
= cur
->beneath
)
845 /* Default implementation of to_get_thread_local_address. */
848 generic_tls_error (void)
850 throw_error (TLS_GENERIC_ERROR
,
851 _("Cannot find thread-local variables on this target"));
854 /* Using the objfile specified in OBJFILE, find the address for the
855 current thread's thread-local storage with offset OFFSET. */
857 target_translate_tls_address (struct objfile
*objfile
, CORE_ADDR offset
)
859 volatile CORE_ADDR addr
= 0;
860 struct target_ops
*target
= ¤t_target
;
862 if (gdbarch_fetch_tls_load_module_address_p (target_gdbarch ()))
864 ptid_t ptid
= inferior_ptid
;
870 /* Fetch the load module address for this objfile. */
871 lm_addr
= gdbarch_fetch_tls_load_module_address (target_gdbarch (),
874 addr
= target
->to_get_thread_local_address (target
, ptid
,
877 /* If an error occurred, print TLS related messages here. Otherwise,
878 throw the error to some higher catcher. */
879 CATCH (ex
, RETURN_MASK_ALL
)
881 int objfile_is_library
= (objfile
->flags
& OBJF_SHARED
);
885 case TLS_NO_LIBRARY_SUPPORT_ERROR
:
886 error (_("Cannot find thread-local variables "
887 "in this thread library."));
889 case TLS_LOAD_MODULE_NOT_FOUND_ERROR
:
890 if (objfile_is_library
)
891 error (_("Cannot find shared library `%s' in dynamic"
892 " linker's load module list"), objfile_name (objfile
));
894 error (_("Cannot find executable file `%s' in dynamic"
895 " linker's load module list"), objfile_name (objfile
));
897 case TLS_NOT_ALLOCATED_YET_ERROR
:
898 if (objfile_is_library
)
899 error (_("The inferior has not yet allocated storage for"
900 " thread-local variables in\n"
901 "the shared library `%s'\n"
903 objfile_name (objfile
), target_pid_to_str (ptid
));
905 error (_("The inferior has not yet allocated storage for"
906 " thread-local variables in\n"
907 "the executable `%s'\n"
909 objfile_name (objfile
), target_pid_to_str (ptid
));
911 case TLS_GENERIC_ERROR
:
912 if (objfile_is_library
)
913 error (_("Cannot find thread-local storage for %s, "
914 "shared library %s:\n%s"),
915 target_pid_to_str (ptid
),
916 objfile_name (objfile
), ex
.message
);
918 error (_("Cannot find thread-local storage for %s, "
919 "executable file %s:\n%s"),
920 target_pid_to_str (ptid
),
921 objfile_name (objfile
), ex
.message
);
924 throw_exception (ex
);
930 /* It wouldn't be wrong here to try a gdbarch method, too; finding
931 TLS is an ABI-specific thing. But we don't do that yet. */
933 error (_("Cannot find thread-local variables on this target"));
939 target_xfer_status_to_string (enum target_xfer_status status
)
941 #define CASE(X) case X: return #X
944 CASE(TARGET_XFER_E_IO
);
945 CASE(TARGET_XFER_UNAVAILABLE
);
954 #define MIN(A, B) (((A) <= (B)) ? (A) : (B))
956 /* target_read_string -- read a null terminated string, up to LEN bytes,
957 from MEMADDR in target. Set *ERRNOP to the errno code, or 0 if successful.
958 Set *STRING to a pointer to malloc'd memory containing the data; the caller
959 is responsible for freeing it. Return the number of bytes successfully
963 target_read_string (CORE_ADDR memaddr
, char **string
, int len
, int *errnop
)
969 int buffer_allocated
;
971 unsigned int nbytes_read
= 0;
975 /* Small for testing. */
976 buffer_allocated
= 4;
977 buffer
= (char *) xmalloc (buffer_allocated
);
982 tlen
= MIN (len
, 4 - (memaddr
& 3));
983 offset
= memaddr
& 3;
985 errcode
= target_read_memory (memaddr
& ~3, buf
, sizeof buf
);
988 /* The transfer request might have crossed the boundary to an
989 unallocated region of memory. Retry the transfer, requesting
993 errcode
= target_read_memory (memaddr
, buf
, 1);
998 if (bufptr
- buffer
+ tlen
> buffer_allocated
)
1002 bytes
= bufptr
- buffer
;
1003 buffer_allocated
*= 2;
1004 buffer
= (char *) xrealloc (buffer
, buffer_allocated
);
1005 bufptr
= buffer
+ bytes
;
1008 for (i
= 0; i
< tlen
; i
++)
1010 *bufptr
++ = buf
[i
+ offset
];
1011 if (buf
[i
+ offset
] == '\000')
1013 nbytes_read
+= i
+ 1;
1020 nbytes_read
+= tlen
;
1029 struct target_section_table
*
1030 target_get_section_table (struct target_ops
*target
)
1032 return (*target
->to_get_section_table
) (target
);
1035 /* Find a section containing ADDR. */
1037 struct target_section
*
1038 target_section_by_addr (struct target_ops
*target
, CORE_ADDR addr
)
1040 struct target_section_table
*table
= target_get_section_table (target
);
1041 struct target_section
*secp
;
1046 for (secp
= table
->sections
; secp
< table
->sections_end
; secp
++)
1048 if (addr
>= secp
->addr
&& addr
< secp
->endaddr
)
1055 /* Helper for the memory xfer routines. Checks the attributes of the
1056 memory region of MEMADDR against the read or write being attempted.
1057 If the access is permitted returns true, otherwise returns false.
1058 REGION_P is an optional output parameter. If not-NULL, it is
1059 filled with a pointer to the memory region of MEMADDR. REG_LEN
1060 returns LEN trimmed to the end of the region. This is how much the
1061 caller can continue requesting, if the access is permitted. A
1062 single xfer request must not straddle memory region boundaries. */
1065 memory_xfer_check_region (gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1066 ULONGEST memaddr
, ULONGEST len
, ULONGEST
*reg_len
,
1067 struct mem_region
**region_p
)
1069 struct mem_region
*region
;
1071 region
= lookup_mem_region (memaddr
);
1073 if (region_p
!= NULL
)
1076 switch (region
->attrib
.mode
)
1079 if (writebuf
!= NULL
)
1084 if (readbuf
!= NULL
)
1089 /* We only support writing to flash during "load" for now. */
1090 if (writebuf
!= NULL
)
1091 error (_("Writing to flash memory forbidden in this context"));
1098 /* region->hi == 0 means there's no upper bound. */
1099 if (memaddr
+ len
< region
->hi
|| region
->hi
== 0)
1102 *reg_len
= region
->hi
- memaddr
;
1107 /* Read memory from more than one valid target. A core file, for
1108 instance, could have some of memory but delegate other bits to
1109 the target below it. So, we must manually try all targets. */
1111 enum target_xfer_status
1112 raw_memory_xfer_partial (struct target_ops
*ops
, gdb_byte
*readbuf
,
1113 const gdb_byte
*writebuf
, ULONGEST memaddr
, LONGEST len
,
1114 ULONGEST
*xfered_len
)
1116 enum target_xfer_status res
;
1120 res
= ops
->to_xfer_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1121 readbuf
, writebuf
, memaddr
, len
,
1123 if (res
== TARGET_XFER_OK
)
1126 /* Stop if the target reports that the memory is not available. */
1127 if (res
== TARGET_XFER_UNAVAILABLE
)
1130 /* We want to continue past core files to executables, but not
1131 past a running target's memory. */
1132 if (ops
->to_has_all_memory (ops
))
1137 while (ops
!= NULL
);
1139 /* The cache works at the raw memory level. Make sure the cache
1140 gets updated with raw contents no matter what kind of memory
1141 object was originally being written. Note we do write-through
1142 first, so that if it fails, we don't write to the cache contents
1143 that never made it to the target. */
1144 if (writebuf
!= NULL
1145 && !ptid_equal (inferior_ptid
, null_ptid
)
1146 && target_dcache_init_p ()
1147 && (stack_cache_enabled_p () || code_cache_enabled_p ()))
1149 DCACHE
*dcache
= target_dcache_get ();
1151 /* Note that writing to an area of memory which wasn't present
1152 in the cache doesn't cause it to be loaded in. */
1153 dcache_update (dcache
, res
, memaddr
, writebuf
, *xfered_len
);
1159 /* Perform a partial memory transfer.
1160 For docs see target.h, to_xfer_partial. */
1162 static enum target_xfer_status
1163 memory_xfer_partial_1 (struct target_ops
*ops
, enum target_object object
,
1164 gdb_byte
*readbuf
, const gdb_byte
*writebuf
, ULONGEST memaddr
,
1165 ULONGEST len
, ULONGEST
*xfered_len
)
1167 enum target_xfer_status res
;
1169 struct mem_region
*region
;
1170 struct inferior
*inf
;
1172 /* For accesses to unmapped overlay sections, read directly from
1173 files. Must do this first, as MEMADDR may need adjustment. */
1174 if (readbuf
!= NULL
&& overlay_debugging
)
1176 struct obj_section
*section
= find_pc_overlay (memaddr
);
1178 if (pc_in_unmapped_range (memaddr
, section
))
1180 struct target_section_table
*table
1181 = target_get_section_table (ops
);
1182 const char *section_name
= section
->the_bfd_section
->name
;
1184 memaddr
= overlay_mapped_address (memaddr
, section
);
1185 return section_table_xfer_memory_partial (readbuf
, writebuf
,
1186 memaddr
, len
, xfered_len
,
1188 table
->sections_end
,
1193 /* Try the executable files, if "trust-readonly-sections" is set. */
1194 if (readbuf
!= NULL
&& trust_readonly
)
1196 struct target_section
*secp
;
1197 struct target_section_table
*table
;
1199 secp
= target_section_by_addr (ops
, memaddr
);
1201 && (bfd_get_section_flags (secp
->the_bfd_section
->owner
,
1202 secp
->the_bfd_section
)
1205 table
= target_get_section_table (ops
);
1206 return section_table_xfer_memory_partial (readbuf
, writebuf
,
1207 memaddr
, len
, xfered_len
,
1209 table
->sections_end
,
1214 /* Try GDB's internal data cache. */
1216 if (!memory_xfer_check_region (readbuf
, writebuf
, memaddr
, len
, ®_len
,
1218 return TARGET_XFER_E_IO
;
1220 if (!ptid_equal (inferior_ptid
, null_ptid
))
1221 inf
= find_inferior_ptid (inferior_ptid
);
1227 /* The dcache reads whole cache lines; that doesn't play well
1228 with reading from a trace buffer, because reading outside of
1229 the collected memory range fails. */
1230 && get_traceframe_number () == -1
1231 && (region
->attrib
.cache
1232 || (stack_cache_enabled_p () && object
== TARGET_OBJECT_STACK_MEMORY
)
1233 || (code_cache_enabled_p () && object
== TARGET_OBJECT_CODE_MEMORY
)))
1235 DCACHE
*dcache
= target_dcache_get_or_init ();
1237 return dcache_read_memory_partial (ops
, dcache
, memaddr
, readbuf
,
1238 reg_len
, xfered_len
);
1241 /* If none of those methods found the memory we wanted, fall back
1242 to a target partial transfer. Normally a single call to
1243 to_xfer_partial is enough; if it doesn't recognize an object
1244 it will call the to_xfer_partial of the next target down.
1245 But for memory this won't do. Memory is the only target
1246 object which can be read from more than one valid target.
1247 A core file, for instance, could have some of memory but
1248 delegate other bits to the target below it. So, we must
1249 manually try all targets. */
1251 res
= raw_memory_xfer_partial (ops
, readbuf
, writebuf
, memaddr
, reg_len
,
1254 /* If we still haven't got anything, return the last error. We
1259 /* Perform a partial memory transfer. For docs see target.h,
1262 static enum target_xfer_status
1263 memory_xfer_partial (struct target_ops
*ops
, enum target_object object
,
1264 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1265 ULONGEST memaddr
, ULONGEST len
, ULONGEST
*xfered_len
)
1267 enum target_xfer_status res
;
1269 /* Zero length requests are ok and require no work. */
1271 return TARGET_XFER_EOF
;
1273 /* Fill in READBUF with breakpoint shadows, or WRITEBUF with
1274 breakpoint insns, thus hiding out from higher layers whether
1275 there are software breakpoints inserted in the code stream. */
1276 if (readbuf
!= NULL
)
1278 res
= memory_xfer_partial_1 (ops
, object
, readbuf
, NULL
, memaddr
, len
,
1281 if (res
== TARGET_XFER_OK
&& !show_memory_breakpoints
)
1282 breakpoint_xfer_memory (readbuf
, NULL
, NULL
, memaddr
, *xfered_len
);
1287 struct cleanup
*old_chain
;
1289 /* A large write request is likely to be partially satisfied
1290 by memory_xfer_partial_1. We will continually malloc
1291 and free a copy of the entire write request for breakpoint
1292 shadow handling even though we only end up writing a small
1293 subset of it. Cap writes to a limit specified by the target
1294 to mitigate this. */
1295 len
= min (ops
->to_get_memory_xfer_limit (ops
), len
);
1297 buf
= (gdb_byte
*) xmalloc (len
);
1298 old_chain
= make_cleanup (xfree
, buf
);
1299 memcpy (buf
, writebuf
, len
);
1301 breakpoint_xfer_memory (NULL
, buf
, writebuf
, memaddr
, len
);
1302 res
= memory_xfer_partial_1 (ops
, object
, NULL
, buf
, memaddr
, len
,
1305 do_cleanups (old_chain
);
1312 restore_show_memory_breakpoints (void *arg
)
1314 show_memory_breakpoints
= (uintptr_t) arg
;
1318 make_show_memory_breakpoints_cleanup (int show
)
1320 int current
= show_memory_breakpoints
;
1322 show_memory_breakpoints
= show
;
1323 return make_cleanup (restore_show_memory_breakpoints
,
1324 (void *) (uintptr_t) current
);
1327 /* For docs see target.h, to_xfer_partial. */
1329 enum target_xfer_status
1330 target_xfer_partial (struct target_ops
*ops
,
1331 enum target_object object
, const char *annex
,
1332 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1333 ULONGEST offset
, ULONGEST len
,
1334 ULONGEST
*xfered_len
)
1336 enum target_xfer_status retval
;
1338 gdb_assert (ops
->to_xfer_partial
!= NULL
);
1340 /* Transfer is done when LEN is zero. */
1342 return TARGET_XFER_EOF
;
1344 if (writebuf
&& !may_write_memory
)
1345 error (_("Writing to memory is not allowed (addr %s, len %s)"),
1346 core_addr_to_string_nz (offset
), plongest (len
));
1350 /* If this is a memory transfer, let the memory-specific code
1351 have a look at it instead. Memory transfers are more
1353 if (object
== TARGET_OBJECT_MEMORY
|| object
== TARGET_OBJECT_STACK_MEMORY
1354 || object
== TARGET_OBJECT_CODE_MEMORY
)
1355 retval
= memory_xfer_partial (ops
, object
, readbuf
,
1356 writebuf
, offset
, len
, xfered_len
);
1357 else if (object
== TARGET_OBJECT_RAW_MEMORY
)
1359 /* Skip/avoid accessing the target if the memory region
1360 attributes block the access. Check this here instead of in
1361 raw_memory_xfer_partial as otherwise we'd end up checking
1362 this twice in the case of the memory_xfer_partial path is
1363 taken; once before checking the dcache, and another in the
1364 tail call to raw_memory_xfer_partial. */
1365 if (!memory_xfer_check_region (readbuf
, writebuf
, offset
, len
, &len
,
1367 return TARGET_XFER_E_IO
;
1369 /* Request the normal memory object from other layers. */
1370 retval
= raw_memory_xfer_partial (ops
, readbuf
, writebuf
, offset
, len
,
1374 retval
= ops
->to_xfer_partial (ops
, object
, annex
, readbuf
,
1375 writebuf
, offset
, len
, xfered_len
);
1379 const unsigned char *myaddr
= NULL
;
1381 fprintf_unfiltered (gdb_stdlog
,
1382 "%s:target_xfer_partial "
1383 "(%d, %s, %s, %s, %s, %s) = %d, %s",
1386 (annex
? annex
: "(null)"),
1387 host_address_to_string (readbuf
),
1388 host_address_to_string (writebuf
),
1389 core_addr_to_string_nz (offset
),
1390 pulongest (len
), retval
,
1391 pulongest (*xfered_len
));
1397 if (retval
== TARGET_XFER_OK
&& myaddr
!= NULL
)
1401 fputs_unfiltered (", bytes =", gdb_stdlog
);
1402 for (i
= 0; i
< *xfered_len
; i
++)
1404 if ((((intptr_t) &(myaddr
[i
])) & 0xf) == 0)
1406 if (targetdebug
< 2 && i
> 0)
1408 fprintf_unfiltered (gdb_stdlog
, " ...");
1411 fprintf_unfiltered (gdb_stdlog
, "\n");
1414 fprintf_unfiltered (gdb_stdlog
, " %02x", myaddr
[i
] & 0xff);
1418 fputc_unfiltered ('\n', gdb_stdlog
);
1421 /* Check implementations of to_xfer_partial update *XFERED_LEN
1422 properly. Do assertion after printing debug messages, so that we
1423 can find more clues on assertion failure from debugging messages. */
1424 if (retval
== TARGET_XFER_OK
|| retval
== TARGET_XFER_UNAVAILABLE
)
1425 gdb_assert (*xfered_len
> 0);
1430 /* Read LEN bytes of target memory at address MEMADDR, placing the
1431 results in GDB's memory at MYADDR. Returns either 0 for success or
1432 -1 if any error occurs.
1434 If an error occurs, no guarantee is made about the contents of the data at
1435 MYADDR. In particular, the caller should not depend upon partial reads
1436 filling the buffer with good data. There is no way for the caller to know
1437 how much good data might have been transfered anyway. Callers that can
1438 deal with partial reads should call target_read (which will retry until
1439 it makes no progress, and then return how much was transferred). */
1442 target_read_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1444 /* Dispatch to the topmost target, not the flattened current_target.
1445 Memory accesses check target->to_has_(all_)memory, and the
1446 flattened target doesn't inherit those. */
1447 if (target_read (current_target
.beneath
, TARGET_OBJECT_MEMORY
, NULL
,
1448 myaddr
, memaddr
, len
) == len
)
1454 /* See target/target.h. */
1457 target_read_uint32 (CORE_ADDR memaddr
, uint32_t *result
)
1462 r
= target_read_memory (memaddr
, buf
, sizeof buf
);
1465 *result
= extract_unsigned_integer (buf
, sizeof buf
,
1466 gdbarch_byte_order (target_gdbarch ()));
1470 /* Like target_read_memory, but specify explicitly that this is a read
1471 from the target's raw memory. That is, this read bypasses the
1472 dcache, breakpoint shadowing, etc. */
1475 target_read_raw_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1477 /* See comment in target_read_memory about why the request starts at
1478 current_target.beneath. */
1479 if (target_read (current_target
.beneath
, TARGET_OBJECT_RAW_MEMORY
, NULL
,
1480 myaddr
, memaddr
, len
) == len
)
1486 /* Like target_read_memory, but specify explicitly that this is a read from
1487 the target's stack. This may trigger different cache behavior. */
1490 target_read_stack (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1492 /* See comment in target_read_memory about why the request starts at
1493 current_target.beneath. */
1494 if (target_read (current_target
.beneath
, TARGET_OBJECT_STACK_MEMORY
, NULL
,
1495 myaddr
, memaddr
, len
) == len
)
1501 /* Like target_read_memory, but specify explicitly that this is a read from
1502 the target's code. This may trigger different cache behavior. */
1505 target_read_code (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1507 /* See comment in target_read_memory about why the request starts at
1508 current_target.beneath. */
1509 if (target_read (current_target
.beneath
, TARGET_OBJECT_CODE_MEMORY
, NULL
,
1510 myaddr
, memaddr
, len
) == len
)
1516 /* Write LEN bytes from MYADDR to target memory at address MEMADDR.
1517 Returns either 0 for success or -1 if any error occurs. If an
1518 error occurs, no guarantee is made about how much data got written.
1519 Callers that can deal with partial writes should call
1523 target_write_memory (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ssize_t len
)
1525 /* See comment in target_read_memory about why the request starts at
1526 current_target.beneath. */
1527 if (target_write (current_target
.beneath
, TARGET_OBJECT_MEMORY
, NULL
,
1528 myaddr
, memaddr
, len
) == len
)
1534 /* Write LEN bytes from MYADDR to target raw memory at address
1535 MEMADDR. Returns either 0 for success or -1 if any error occurs.
1536 If an error occurs, no guarantee is made about how much data got
1537 written. Callers that can deal with partial writes should call
1541 target_write_raw_memory (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ssize_t len
)
1543 /* See comment in target_read_memory about why the request starts at
1544 current_target.beneath. */
1545 if (target_write (current_target
.beneath
, TARGET_OBJECT_RAW_MEMORY
, NULL
,
1546 myaddr
, memaddr
, len
) == len
)
1552 /* Fetch the target's memory map. */
1555 target_memory_map (void)
1557 VEC(mem_region_s
) *result
;
1558 struct mem_region
*last_one
, *this_one
;
1560 result
= current_target
.to_memory_map (¤t_target
);
1564 qsort (VEC_address (mem_region_s
, result
),
1565 VEC_length (mem_region_s
, result
),
1566 sizeof (struct mem_region
), mem_region_cmp
);
1568 /* Check that regions do not overlap. Simultaneously assign
1569 a numbering for the "mem" commands to use to refer to
1572 for (ix
= 0; VEC_iterate (mem_region_s
, result
, ix
, this_one
); ix
++)
1574 this_one
->number
= ix
;
1576 if (last_one
&& last_one
->hi
> this_one
->lo
)
1578 warning (_("Overlapping regions in memory map: ignoring"));
1579 VEC_free (mem_region_s
, result
);
1582 last_one
= this_one
;
1589 target_flash_erase (ULONGEST address
, LONGEST length
)
1591 current_target
.to_flash_erase (¤t_target
, address
, length
);
1595 target_flash_done (void)
1597 current_target
.to_flash_done (¤t_target
);
1601 show_trust_readonly (struct ui_file
*file
, int from_tty
,
1602 struct cmd_list_element
*c
, const char *value
)
1604 fprintf_filtered (file
,
1605 _("Mode for reading from readonly sections is %s.\n"),
1609 /* Target vector read/write partial wrapper functions. */
1611 static enum target_xfer_status
1612 target_read_partial (struct target_ops
*ops
,
1613 enum target_object object
,
1614 const char *annex
, gdb_byte
*buf
,
1615 ULONGEST offset
, ULONGEST len
,
1616 ULONGEST
*xfered_len
)
1618 return target_xfer_partial (ops
, object
, annex
, buf
, NULL
, offset
, len
,
1622 static enum target_xfer_status
1623 target_write_partial (struct target_ops
*ops
,
1624 enum target_object object
,
1625 const char *annex
, const gdb_byte
*buf
,
1626 ULONGEST offset
, LONGEST len
, ULONGEST
*xfered_len
)
1628 return target_xfer_partial (ops
, object
, annex
, NULL
, buf
, offset
, len
,
1632 /* Wrappers to perform the full transfer. */
1634 /* For docs on target_read see target.h. */
1637 target_read (struct target_ops
*ops
,
1638 enum target_object object
,
1639 const char *annex
, gdb_byte
*buf
,
1640 ULONGEST offset
, LONGEST len
)
1642 LONGEST xfered_total
= 0;
1645 /* If we are reading from a memory object, find the length of an addressable
1646 unit for that architecture. */
1647 if (object
== TARGET_OBJECT_MEMORY
1648 || object
== TARGET_OBJECT_STACK_MEMORY
1649 || object
== TARGET_OBJECT_CODE_MEMORY
1650 || object
== TARGET_OBJECT_RAW_MEMORY
)
1651 unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
1653 while (xfered_total
< len
)
1655 ULONGEST xfered_partial
;
1656 enum target_xfer_status status
;
1658 status
= target_read_partial (ops
, object
, annex
,
1659 buf
+ xfered_total
* unit_size
,
1660 offset
+ xfered_total
, len
- xfered_total
,
1663 /* Call an observer, notifying them of the xfer progress? */
1664 if (status
== TARGET_XFER_EOF
)
1665 return xfered_total
;
1666 else if (status
== TARGET_XFER_OK
)
1668 xfered_total
+= xfered_partial
;
1672 return TARGET_XFER_E_IO
;
1678 /* Assuming that the entire [begin, end) range of memory cannot be
1679 read, try to read whatever subrange is possible to read.
1681 The function returns, in RESULT, either zero or one memory block.
1682 If there's a readable subrange at the beginning, it is completely
1683 read and returned. Any further readable subrange will not be read.
1684 Otherwise, if there's a readable subrange at the end, it will be
1685 completely read and returned. Any readable subranges before it
1686 (obviously, not starting at the beginning), will be ignored. In
1687 other cases -- either no readable subrange, or readable subrange(s)
1688 that is neither at the beginning, or end, nothing is returned.
1690 The purpose of this function is to handle a read across a boundary
1691 of accessible memory in a case when memory map is not available.
1692 The above restrictions are fine for this case, but will give
1693 incorrect results if the memory is 'patchy'. However, supporting
1694 'patchy' memory would require trying to read every single byte,
1695 and it seems unacceptable solution. Explicit memory map is
1696 recommended for this case -- and target_read_memory_robust will
1697 take care of reading multiple ranges then. */
1700 read_whatever_is_readable (struct target_ops
*ops
,
1701 const ULONGEST begin
, const ULONGEST end
,
1703 VEC(memory_read_result_s
) **result
)
1705 gdb_byte
*buf
= (gdb_byte
*) xmalloc (end
- begin
);
1706 ULONGEST current_begin
= begin
;
1707 ULONGEST current_end
= end
;
1709 memory_read_result_s r
;
1710 ULONGEST xfered_len
;
1712 /* If we previously failed to read 1 byte, nothing can be done here. */
1713 if (end
- begin
<= 1)
1719 /* Check that either first or the last byte is readable, and give up
1720 if not. This heuristic is meant to permit reading accessible memory
1721 at the boundary of accessible region. */
1722 if (target_read_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1723 buf
, begin
, 1, &xfered_len
) == TARGET_XFER_OK
)
1728 else if (target_read_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1729 buf
+ (end
- begin
) - 1, end
- 1, 1,
1730 &xfered_len
) == TARGET_XFER_OK
)
1741 /* Loop invariant is that the [current_begin, current_end) was previously
1742 found to be not readable as a whole.
1744 Note loop condition -- if the range has 1 byte, we can't divide the range
1745 so there's no point trying further. */
1746 while (current_end
- current_begin
> 1)
1748 ULONGEST first_half_begin
, first_half_end
;
1749 ULONGEST second_half_begin
, second_half_end
;
1751 ULONGEST middle
= current_begin
+ (current_end
- current_begin
) / 2;
1755 first_half_begin
= current_begin
;
1756 first_half_end
= middle
;
1757 second_half_begin
= middle
;
1758 second_half_end
= current_end
;
1762 first_half_begin
= middle
;
1763 first_half_end
= current_end
;
1764 second_half_begin
= current_begin
;
1765 second_half_end
= middle
;
1768 xfer
= target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1769 buf
+ (first_half_begin
- begin
) * unit_size
,
1771 first_half_end
- first_half_begin
);
1773 if (xfer
== first_half_end
- first_half_begin
)
1775 /* This half reads up fine. So, the error must be in the
1777 current_begin
= second_half_begin
;
1778 current_end
= second_half_end
;
1782 /* This half is not readable. Because we've tried one byte, we
1783 know some part of this half if actually readable. Go to the next
1784 iteration to divide again and try to read.
1786 We don't handle the other half, because this function only tries
1787 to read a single readable subrange. */
1788 current_begin
= first_half_begin
;
1789 current_end
= first_half_end
;
1795 /* The [begin, current_begin) range has been read. */
1797 r
.end
= current_begin
;
1802 /* The [current_end, end) range has been read. */
1803 LONGEST region_len
= end
- current_end
;
1805 r
.data
= (gdb_byte
*) xmalloc (region_len
* unit_size
);
1806 memcpy (r
.data
, buf
+ (current_end
- begin
) * unit_size
,
1807 region_len
* unit_size
);
1808 r
.begin
= current_end
;
1812 VEC_safe_push(memory_read_result_s
, (*result
), &r
);
1816 free_memory_read_result_vector (void *x
)
1818 VEC(memory_read_result_s
) **v
= (VEC(memory_read_result_s
) **) x
;
1819 memory_read_result_s
*current
;
1822 for (ix
= 0; VEC_iterate (memory_read_result_s
, *v
, ix
, current
); ++ix
)
1824 xfree (current
->data
);
1826 VEC_free (memory_read_result_s
, *v
);
1829 VEC(memory_read_result_s
) *
1830 read_memory_robust (struct target_ops
*ops
,
1831 const ULONGEST offset
, const LONGEST len
)
1833 VEC(memory_read_result_s
) *result
= 0;
1834 int unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
1835 struct cleanup
*cleanup
= make_cleanup (free_memory_read_result_vector
,
1838 LONGEST xfered_total
= 0;
1839 while (xfered_total
< len
)
1841 struct mem_region
*region
= lookup_mem_region (offset
+ xfered_total
);
1844 /* If there is no explicit region, a fake one should be created. */
1845 gdb_assert (region
);
1847 if (region
->hi
== 0)
1848 region_len
= len
- xfered_total
;
1850 region_len
= region
->hi
- offset
;
1852 if (region
->attrib
.mode
== MEM_NONE
|| region
->attrib
.mode
== MEM_WO
)
1854 /* Cannot read this region. Note that we can end up here only
1855 if the region is explicitly marked inaccessible, or
1856 'inaccessible-by-default' is in effect. */
1857 xfered_total
+= region_len
;
1861 LONGEST to_read
= min (len
- xfered_total
, region_len
);
1862 gdb_byte
*buffer
= (gdb_byte
*) xmalloc (to_read
* unit_size
);
1863 struct cleanup
*inner_cleanup
= make_cleanup (xfree
, buffer
);
1865 LONGEST xfered_partial
=
1866 target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1867 (gdb_byte
*) buffer
,
1868 offset
+ xfered_total
, to_read
);
1869 /* Call an observer, notifying them of the xfer progress? */
1870 if (xfered_partial
<= 0)
1872 /* Got an error reading full chunk. See if maybe we can read
1874 do_cleanups (inner_cleanup
);
1875 read_whatever_is_readable (ops
, offset
+ xfered_total
,
1876 offset
+ xfered_total
+ to_read
,
1877 unit_size
, &result
);
1878 xfered_total
+= to_read
;
1882 struct memory_read_result r
;
1884 discard_cleanups (inner_cleanup
);
1886 r
.begin
= offset
+ xfered_total
;
1887 r
.end
= r
.begin
+ xfered_partial
;
1888 VEC_safe_push (memory_read_result_s
, result
, &r
);
1889 xfered_total
+= xfered_partial
;
1895 discard_cleanups (cleanup
);
1900 /* An alternative to target_write with progress callbacks. */
1903 target_write_with_progress (struct target_ops
*ops
,
1904 enum target_object object
,
1905 const char *annex
, const gdb_byte
*buf
,
1906 ULONGEST offset
, LONGEST len
,
1907 void (*progress
) (ULONGEST
, void *), void *baton
)
1909 LONGEST xfered_total
= 0;
1912 /* If we are writing to a memory object, find the length of an addressable
1913 unit for that architecture. */
1914 if (object
== TARGET_OBJECT_MEMORY
1915 || object
== TARGET_OBJECT_STACK_MEMORY
1916 || object
== TARGET_OBJECT_CODE_MEMORY
1917 || object
== TARGET_OBJECT_RAW_MEMORY
)
1918 unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
1920 /* Give the progress callback a chance to set up. */
1922 (*progress
) (0, baton
);
1924 while (xfered_total
< len
)
1926 ULONGEST xfered_partial
;
1927 enum target_xfer_status status
;
1929 status
= target_write_partial (ops
, object
, annex
,
1930 buf
+ xfered_total
* unit_size
,
1931 offset
+ xfered_total
, len
- xfered_total
,
1934 if (status
!= TARGET_XFER_OK
)
1935 return status
== TARGET_XFER_EOF
? xfered_total
: TARGET_XFER_E_IO
;
1938 (*progress
) (xfered_partial
, baton
);
1940 xfered_total
+= xfered_partial
;
1946 /* For docs on target_write see target.h. */
1949 target_write (struct target_ops
*ops
,
1950 enum target_object object
,
1951 const char *annex
, const gdb_byte
*buf
,
1952 ULONGEST offset
, LONGEST len
)
1954 return target_write_with_progress (ops
, object
, annex
, buf
, offset
, len
,
1958 /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return
1959 the size of the transferred data. PADDING additional bytes are
1960 available in *BUF_P. This is a helper function for
1961 target_read_alloc; see the declaration of that function for more
1965 target_read_alloc_1 (struct target_ops
*ops
, enum target_object object
,
1966 const char *annex
, gdb_byte
**buf_p
, int padding
)
1968 size_t buf_alloc
, buf_pos
;
1971 /* This function does not have a length parameter; it reads the
1972 entire OBJECT). Also, it doesn't support objects fetched partly
1973 from one target and partly from another (in a different stratum,
1974 e.g. a core file and an executable). Both reasons make it
1975 unsuitable for reading memory. */
1976 gdb_assert (object
!= TARGET_OBJECT_MEMORY
);
1978 /* Start by reading up to 4K at a time. The target will throttle
1979 this number down if necessary. */
1981 buf
= (gdb_byte
*) xmalloc (buf_alloc
);
1985 ULONGEST xfered_len
;
1986 enum target_xfer_status status
;
1988 status
= target_read_partial (ops
, object
, annex
, &buf
[buf_pos
],
1989 buf_pos
, buf_alloc
- buf_pos
- padding
,
1992 if (status
== TARGET_XFER_EOF
)
1994 /* Read all there was. */
2001 else if (status
!= TARGET_XFER_OK
)
2003 /* An error occurred. */
2005 return TARGET_XFER_E_IO
;
2008 buf_pos
+= xfered_len
;
2010 /* If the buffer is filling up, expand it. */
2011 if (buf_alloc
< buf_pos
* 2)
2014 buf
= (gdb_byte
*) xrealloc (buf
, buf_alloc
);
2021 /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return
2022 the size of the transferred data. See the declaration in "target.h"
2023 function for more information about the return value. */
2026 target_read_alloc (struct target_ops
*ops
, enum target_object object
,
2027 const char *annex
, gdb_byte
**buf_p
)
2029 return target_read_alloc_1 (ops
, object
, annex
, buf_p
, 0);
2032 /* Read OBJECT/ANNEX using OPS. The result is NUL-terminated and
2033 returned as a string, allocated using xmalloc. If an error occurs
2034 or the transfer is unsupported, NULL is returned. Empty objects
2035 are returned as allocated but empty strings. A warning is issued
2036 if the result contains any embedded NUL bytes. */
2039 target_read_stralloc (struct target_ops
*ops
, enum target_object object
,
2044 LONGEST i
, transferred
;
2046 transferred
= target_read_alloc_1 (ops
, object
, annex
, &buffer
, 1);
2047 bufstr
= (char *) buffer
;
2049 if (transferred
< 0)
2052 if (transferred
== 0)
2053 return xstrdup ("");
2055 bufstr
[transferred
] = 0;
2057 /* Check for embedded NUL bytes; but allow trailing NULs. */
2058 for (i
= strlen (bufstr
); i
< transferred
; i
++)
2061 warning (_("target object %d, annex %s, "
2062 "contained unexpected null characters"),
2063 (int) object
, annex
? annex
: "(none)");
2070 /* Memory transfer methods. */
2073 get_target_memory (struct target_ops
*ops
, CORE_ADDR addr
, gdb_byte
*buf
,
2076 /* This method is used to read from an alternate, non-current
2077 target. This read must bypass the overlay support (as symbols
2078 don't match this target), and GDB's internal cache (wrong cache
2079 for this target). */
2080 if (target_read (ops
, TARGET_OBJECT_RAW_MEMORY
, NULL
, buf
, addr
, len
)
2082 memory_error (TARGET_XFER_E_IO
, addr
);
2086 get_target_memory_unsigned (struct target_ops
*ops
, CORE_ADDR addr
,
2087 int len
, enum bfd_endian byte_order
)
2089 gdb_byte buf
[sizeof (ULONGEST
)];
2091 gdb_assert (len
<= sizeof (buf
));
2092 get_target_memory (ops
, addr
, buf
, len
);
2093 return extract_unsigned_integer (buf
, len
, byte_order
);
2099 target_insert_breakpoint (struct gdbarch
*gdbarch
,
2100 struct bp_target_info
*bp_tgt
)
2102 if (!may_insert_breakpoints
)
2104 warning (_("May not insert breakpoints"));
2108 return current_target
.to_insert_breakpoint (¤t_target
,
2115 target_remove_breakpoint (struct gdbarch
*gdbarch
,
2116 struct bp_target_info
*bp_tgt
,
2117 enum remove_bp_reason reason
)
2119 /* This is kind of a weird case to handle, but the permission might
2120 have been changed after breakpoints were inserted - in which case
2121 we should just take the user literally and assume that any
2122 breakpoints should be left in place. */
2123 if (!may_insert_breakpoints
)
2125 warning (_("May not remove breakpoints"));
2129 return current_target
.to_remove_breakpoint (¤t_target
,
2130 gdbarch
, bp_tgt
, reason
);
2134 target_info (char *args
, int from_tty
)
2136 struct target_ops
*t
;
2137 int has_all_mem
= 0;
2139 if (symfile_objfile
!= NULL
)
2140 printf_unfiltered (_("Symbols from \"%s\".\n"),
2141 objfile_name (symfile_objfile
));
2143 for (t
= target_stack
; t
!= NULL
; t
= t
->beneath
)
2145 if (!(*t
->to_has_memory
) (t
))
2148 if ((int) (t
->to_stratum
) <= (int) dummy_stratum
)
2151 printf_unfiltered (_("\tWhile running this, "
2152 "GDB does not access memory from...\n"));
2153 printf_unfiltered ("%s:\n", t
->to_longname
);
2154 (t
->to_files_info
) (t
);
2155 has_all_mem
= (*t
->to_has_all_memory
) (t
);
2159 /* This function is called before any new inferior is created, e.g.
2160 by running a program, attaching, or connecting to a target.
2161 It cleans up any state from previous invocations which might
2162 change between runs. This is a subset of what target_preopen
2163 resets (things which might change between targets). */
2166 target_pre_inferior (int from_tty
)
2168 /* Clear out solib state. Otherwise the solib state of the previous
2169 inferior might have survived and is entirely wrong for the new
2170 target. This has been observed on GNU/Linux using glibc 2.3. How
2182 Cannot access memory at address 0xdeadbeef
2185 /* In some OSs, the shared library list is the same/global/shared
2186 across inferiors. If code is shared between processes, so are
2187 memory regions and features. */
2188 if (!gdbarch_has_global_solist (target_gdbarch ()))
2190 no_shared_libraries (NULL
, from_tty
);
2192 invalidate_target_mem_regions ();
2194 target_clear_description ();
2197 /* attach_flag may be set if the previous process associated with
2198 the inferior was attached to. */
2199 current_inferior ()->attach_flag
= 0;
2201 current_inferior ()->highest_thread_num
= 0;
2203 agent_capability_invalidate ();
2206 /* Callback for iterate_over_inferiors. Gets rid of the given
2210 dispose_inferior (struct inferior
*inf
, void *args
)
2212 struct thread_info
*thread
;
2214 thread
= any_thread_of_process (inf
->pid
);
2217 switch_to_thread (thread
->ptid
);
2219 /* Core inferiors actually should be detached, not killed. */
2220 if (target_has_execution
)
2223 target_detach (NULL
, 0);
2229 /* This is to be called by the open routine before it does
2233 target_preopen (int from_tty
)
2237 if (have_inferiors ())
2240 || !have_live_inferiors ()
2241 || query (_("A program is being debugged already. Kill it? ")))
2242 iterate_over_inferiors (dispose_inferior
, NULL
);
2244 error (_("Program not killed."));
2247 /* Calling target_kill may remove the target from the stack. But if
2248 it doesn't (which seems like a win for UDI), remove it now. */
2249 /* Leave the exec target, though. The user may be switching from a
2250 live process to a core of the same program. */
2251 pop_all_targets_above (file_stratum
);
2253 target_pre_inferior (from_tty
);
2256 /* Detach a target after doing deferred register stores. */
2259 target_detach (const char *args
, int from_tty
)
2261 if (gdbarch_has_global_breakpoints (target_gdbarch ()))
2262 /* Don't remove global breakpoints here. They're removed on
2263 disconnection from the target. */
2266 /* If we're in breakpoints-always-inserted mode, have to remove
2267 them before detaching. */
2268 remove_breakpoints_pid (ptid_get_pid (inferior_ptid
));
2270 prepare_for_detach ();
2272 current_target
.to_detach (¤t_target
, args
, from_tty
);
2276 target_disconnect (const char *args
, int from_tty
)
2278 /* If we're in breakpoints-always-inserted mode or if breakpoints
2279 are global across processes, we have to remove them before
2281 remove_breakpoints ();
2283 current_target
.to_disconnect (¤t_target
, args
, from_tty
);
2287 target_wait (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
2289 return (current_target
.to_wait
) (¤t_target
, ptid
, status
, options
);
2295 default_target_wait (struct target_ops
*ops
,
2296 ptid_t ptid
, struct target_waitstatus
*status
,
2299 status
->kind
= TARGET_WAITKIND_IGNORE
;
2300 return minus_one_ptid
;
2304 target_pid_to_str (ptid_t ptid
)
2306 return (*current_target
.to_pid_to_str
) (¤t_target
, ptid
);
2310 target_thread_name (struct thread_info
*info
)
2312 return current_target
.to_thread_name (¤t_target
, info
);
2316 target_resume (ptid_t ptid
, int step
, enum gdb_signal signal
)
2318 target_dcache_invalidate ();
2320 current_target
.to_resume (¤t_target
, ptid
, step
, signal
);
2322 registers_changed_ptid (ptid
);
2323 /* We only set the internal executing state here. The user/frontend
2324 running state is set at a higher level. */
2325 set_executing (ptid
, 1);
2326 clear_inline_frame_state (ptid
);
2330 target_pass_signals (int numsigs
, unsigned char *pass_signals
)
2332 (*current_target
.to_pass_signals
) (¤t_target
, numsigs
, pass_signals
);
2336 target_program_signals (int numsigs
, unsigned char *program_signals
)
2338 (*current_target
.to_program_signals
) (¤t_target
,
2339 numsigs
, program_signals
);
2343 default_follow_fork (struct target_ops
*self
, int follow_child
,
2346 /* Some target returned a fork event, but did not know how to follow it. */
2347 internal_error (__FILE__
, __LINE__
,
2348 _("could not find a target to follow fork"));
2351 /* Look through the list of possible targets for a target that can
2355 target_follow_fork (int follow_child
, int detach_fork
)
2357 return current_target
.to_follow_fork (¤t_target
,
2358 follow_child
, detach_fork
);
2361 /* Target wrapper for follow exec hook. */
2364 target_follow_exec (struct inferior
*inf
, char *execd_pathname
)
2366 current_target
.to_follow_exec (¤t_target
, inf
, execd_pathname
);
2370 default_mourn_inferior (struct target_ops
*self
)
2372 internal_error (__FILE__
, __LINE__
,
2373 _("could not find a target to follow mourn inferior"));
2377 target_mourn_inferior (void)
2379 current_target
.to_mourn_inferior (¤t_target
);
2381 /* We no longer need to keep handles on any of the object files.
2382 Make sure to release them to avoid unnecessarily locking any
2383 of them while we're not actually debugging. */
2384 bfd_cache_close_all ();
2387 /* Look for a target which can describe architectural features, starting
2388 from TARGET. If we find one, return its description. */
2390 const struct target_desc
*
2391 target_read_description (struct target_ops
*target
)
2393 return target
->to_read_description (target
);
2396 /* This implements a basic search of memory, reading target memory and
2397 performing the search here (as opposed to performing the search in on the
2398 target side with, for example, gdbserver). */
2401 simple_search_memory (struct target_ops
*ops
,
2402 CORE_ADDR start_addr
, ULONGEST search_space_len
,
2403 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2404 CORE_ADDR
*found_addrp
)
2406 /* NOTE: also defined in find.c testcase. */
2407 #define SEARCH_CHUNK_SIZE 16000
2408 const unsigned chunk_size
= SEARCH_CHUNK_SIZE
;
2409 /* Buffer to hold memory contents for searching. */
2410 gdb_byte
*search_buf
;
2411 unsigned search_buf_size
;
2412 struct cleanup
*old_cleanups
;
2414 search_buf_size
= chunk_size
+ pattern_len
- 1;
2416 /* No point in trying to allocate a buffer larger than the search space. */
2417 if (search_space_len
< search_buf_size
)
2418 search_buf_size
= search_space_len
;
2420 search_buf
= (gdb_byte
*) malloc (search_buf_size
);
2421 if (search_buf
== NULL
)
2422 error (_("Unable to allocate memory to perform the search."));
2423 old_cleanups
= make_cleanup (free_current_contents
, &search_buf
);
2425 /* Prime the search buffer. */
2427 if (target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2428 search_buf
, start_addr
, search_buf_size
) != search_buf_size
)
2430 warning (_("Unable to access %s bytes of target "
2431 "memory at %s, halting search."),
2432 pulongest (search_buf_size
), hex_string (start_addr
));
2433 do_cleanups (old_cleanups
);
2437 /* Perform the search.
2439 The loop is kept simple by allocating [N + pattern-length - 1] bytes.
2440 When we've scanned N bytes we copy the trailing bytes to the start and
2441 read in another N bytes. */
2443 while (search_space_len
>= pattern_len
)
2445 gdb_byte
*found_ptr
;
2446 unsigned nr_search_bytes
= min (search_space_len
, search_buf_size
);
2448 found_ptr
= (gdb_byte
*) memmem (search_buf
, nr_search_bytes
,
2449 pattern
, pattern_len
);
2451 if (found_ptr
!= NULL
)
2453 CORE_ADDR found_addr
= start_addr
+ (found_ptr
- search_buf
);
2455 *found_addrp
= found_addr
;
2456 do_cleanups (old_cleanups
);
2460 /* Not found in this chunk, skip to next chunk. */
2462 /* Don't let search_space_len wrap here, it's unsigned. */
2463 if (search_space_len
>= chunk_size
)
2464 search_space_len
-= chunk_size
;
2466 search_space_len
= 0;
2468 if (search_space_len
>= pattern_len
)
2470 unsigned keep_len
= search_buf_size
- chunk_size
;
2471 CORE_ADDR read_addr
= start_addr
+ chunk_size
+ keep_len
;
2474 /* Copy the trailing part of the previous iteration to the front
2475 of the buffer for the next iteration. */
2476 gdb_assert (keep_len
== pattern_len
- 1);
2477 memcpy (search_buf
, search_buf
+ chunk_size
, keep_len
);
2479 nr_to_read
= min (search_space_len
- keep_len
, chunk_size
);
2481 if (target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2482 search_buf
+ keep_len
, read_addr
,
2483 nr_to_read
) != nr_to_read
)
2485 warning (_("Unable to access %s bytes of target "
2486 "memory at %s, halting search."),
2487 plongest (nr_to_read
),
2488 hex_string (read_addr
));
2489 do_cleanups (old_cleanups
);
2493 start_addr
+= chunk_size
;
2499 do_cleanups (old_cleanups
);
2503 /* Default implementation of memory-searching. */
2506 default_search_memory (struct target_ops
*self
,
2507 CORE_ADDR start_addr
, ULONGEST search_space_len
,
2508 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2509 CORE_ADDR
*found_addrp
)
2511 /* Start over from the top of the target stack. */
2512 return simple_search_memory (current_target
.beneath
,
2513 start_addr
, search_space_len
,
2514 pattern
, pattern_len
, found_addrp
);
2517 /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the
2518 sequence of bytes in PATTERN with length PATTERN_LEN.
2520 The result is 1 if found, 0 if not found, and -1 if there was an error
2521 requiring halting of the search (e.g. memory read error).
2522 If the pattern is found the address is recorded in FOUND_ADDRP. */
2525 target_search_memory (CORE_ADDR start_addr
, ULONGEST search_space_len
,
2526 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2527 CORE_ADDR
*found_addrp
)
2529 return current_target
.to_search_memory (¤t_target
, start_addr
,
2531 pattern
, pattern_len
, found_addrp
);
2534 /* Look through the currently pushed targets. If none of them will
2535 be able to restart the currently running process, issue an error
2539 target_require_runnable (void)
2541 struct target_ops
*t
;
2543 for (t
= target_stack
; t
!= NULL
; t
= t
->beneath
)
2545 /* If this target knows how to create a new program, then
2546 assume we will still be able to after killing the current
2547 one. Either killing and mourning will not pop T, or else
2548 find_default_run_target will find it again. */
2549 if (t
->to_create_inferior
!= NULL
)
2552 /* Do not worry about targets at certain strata that can not
2553 create inferiors. Assume they will be pushed again if
2554 necessary, and continue to the process_stratum. */
2555 if (t
->to_stratum
== thread_stratum
2556 || t
->to_stratum
== record_stratum
2557 || t
->to_stratum
== arch_stratum
)
2560 error (_("The \"%s\" target does not support \"run\". "
2561 "Try \"help target\" or \"continue\"."),
2565 /* This function is only called if the target is running. In that
2566 case there should have been a process_stratum target and it
2567 should either know how to create inferiors, or not... */
2568 internal_error (__FILE__
, __LINE__
, _("No targets found"));
2571 /* Whether GDB is allowed to fall back to the default run target for
2572 "run", "attach", etc. when no target is connected yet. */
2573 static int auto_connect_native_target
= 1;
2576 show_auto_connect_native_target (struct ui_file
*file
, int from_tty
,
2577 struct cmd_list_element
*c
, const char *value
)
2579 fprintf_filtered (file
,
2580 _("Whether GDB may automatically connect to the "
2581 "native target is %s.\n"),
2585 /* Look through the list of possible targets for a target that can
2586 execute a run or attach command without any other data. This is
2587 used to locate the default process stratum.
2589 If DO_MESG is not NULL, the result is always valid (error() is
2590 called for errors); else, return NULL on error. */
2592 static struct target_ops
*
2593 find_default_run_target (char *do_mesg
)
2595 struct target_ops
*runable
= NULL
;
2597 if (auto_connect_native_target
)
2599 struct target_ops
*t
;
2603 for (i
= 0; VEC_iterate (target_ops_p
, target_structs
, i
, t
); ++i
)
2605 if (t
->to_can_run
!= delegate_can_run
&& target_can_run (t
))
2616 if (runable
== NULL
)
2619 error (_("Don't know how to %s. Try \"help target\"."), do_mesg
);
2630 find_attach_target (void)
2632 struct target_ops
*t
;
2634 /* If a target on the current stack can attach, use it. */
2635 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2637 if (t
->to_attach
!= NULL
)
2641 /* Otherwise, use the default run target for attaching. */
2643 t
= find_default_run_target ("attach");
2651 find_run_target (void)
2653 struct target_ops
*t
;
2655 /* If a target on the current stack can attach, use it. */
2656 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2658 if (t
->to_create_inferior
!= NULL
)
2662 /* Otherwise, use the default run target. */
2664 t
= find_default_run_target ("run");
2669 /* Implement the "info proc" command. */
2672 target_info_proc (const char *args
, enum info_proc_what what
)
2674 struct target_ops
*t
;
2676 /* If we're already connected to something that can get us OS
2677 related data, use it. Otherwise, try using the native
2679 if (current_target
.to_stratum
>= process_stratum
)
2680 t
= current_target
.beneath
;
2682 t
= find_default_run_target (NULL
);
2684 for (; t
!= NULL
; t
= t
->beneath
)
2686 if (t
->to_info_proc
!= NULL
)
2688 t
->to_info_proc (t
, args
, what
);
2691 fprintf_unfiltered (gdb_stdlog
,
2692 "target_info_proc (\"%s\", %d)\n", args
, what
);
2702 find_default_supports_disable_randomization (struct target_ops
*self
)
2704 struct target_ops
*t
;
2706 t
= find_default_run_target (NULL
);
2707 if (t
&& t
->to_supports_disable_randomization
)
2708 return (t
->to_supports_disable_randomization
) (t
);
2713 target_supports_disable_randomization (void)
2715 struct target_ops
*t
;
2717 for (t
= ¤t_target
; t
!= NULL
; t
= t
->beneath
)
2718 if (t
->to_supports_disable_randomization
)
2719 return t
->to_supports_disable_randomization (t
);
2725 target_get_osdata (const char *type
)
2727 struct target_ops
*t
;
2729 /* If we're already connected to something that can get us OS
2730 related data, use it. Otherwise, try using the native
2732 if (current_target
.to_stratum
>= process_stratum
)
2733 t
= current_target
.beneath
;
2735 t
= find_default_run_target ("get OS data");
2740 return target_read_stralloc (t
, TARGET_OBJECT_OSDATA
, type
);
2743 static struct address_space
*
2744 default_thread_address_space (struct target_ops
*self
, ptid_t ptid
)
2746 struct inferior
*inf
;
2748 /* Fall-back to the "main" address space of the inferior. */
2749 inf
= find_inferior_ptid (ptid
);
2751 if (inf
== NULL
|| inf
->aspace
== NULL
)
2752 internal_error (__FILE__
, __LINE__
,
2753 _("Can't determine the current "
2754 "address space of thread %s\n"),
2755 target_pid_to_str (ptid
));
2760 /* Determine the current address space of thread PTID. */
2762 struct address_space
*
2763 target_thread_address_space (ptid_t ptid
)
2765 struct address_space
*aspace
;
2767 aspace
= current_target
.to_thread_address_space (¤t_target
, ptid
);
2768 gdb_assert (aspace
!= NULL
);
2774 /* Target file operations. */
2776 static struct target_ops
*
2777 default_fileio_target (void)
2779 /* If we're already connected to something that can perform
2780 file I/O, use it. Otherwise, try using the native target. */
2781 if (current_target
.to_stratum
>= process_stratum
)
2782 return current_target
.beneath
;
2784 return find_default_run_target ("file I/O");
2787 /* File handle for target file operations. */
2791 /* The target on which this file is open. */
2792 struct target_ops
*t
;
2794 /* The file descriptor on the target. */
2798 DEF_VEC_O (fileio_fh_t
);
2800 /* Vector of currently open file handles. The value returned by
2801 target_fileio_open and passed as the FD argument to other
2802 target_fileio_* functions is an index into this vector. This
2803 vector's entries are never freed; instead, files are marked as
2804 closed, and the handle becomes available for reuse. */
2805 static VEC (fileio_fh_t
) *fileio_fhandles
;
2807 /* Macro to check whether a fileio_fh_t represents a closed file. */
2808 #define is_closed_fileio_fh(fd) ((fd) < 0)
2810 /* Index into fileio_fhandles of the lowest handle that might be
2811 closed. This permits handle reuse without searching the whole
2812 list each time a new file is opened. */
2813 static int lowest_closed_fd
;
2815 /* Acquire a target fileio file descriptor. */
2818 acquire_fileio_fd (struct target_ops
*t
, int fd
)
2822 gdb_assert (!is_closed_fileio_fh (fd
));
2824 /* Search for closed handles to reuse. */
2826 VEC_iterate (fileio_fh_t
, fileio_fhandles
,
2827 lowest_closed_fd
, fh
);
2829 if (is_closed_fileio_fh (fh
->fd
))
2832 /* Push a new handle if no closed handles were found. */
2833 if (lowest_closed_fd
== VEC_length (fileio_fh_t
, fileio_fhandles
))
2834 fh
= VEC_safe_push (fileio_fh_t
, fileio_fhandles
, NULL
);
2836 /* Fill in the handle. */
2840 /* Return its index, and start the next lookup at
2842 return lowest_closed_fd
++;
2845 /* Release a target fileio file descriptor. */
2848 release_fileio_fd (int fd
, fileio_fh_t
*fh
)
2851 lowest_closed_fd
= min (lowest_closed_fd
, fd
);
2854 /* Return a pointer to the fileio_fhandle_t corresponding to FD. */
2856 #define fileio_fd_to_fh(fd) \
2857 VEC_index (fileio_fh_t, fileio_fhandles, (fd))
2859 /* Helper for target_fileio_open and
2860 target_fileio_open_warn_if_slow. */
2863 target_fileio_open_1 (struct inferior
*inf
, const char *filename
,
2864 int flags
, int mode
, int warn_if_slow
,
2867 struct target_ops
*t
;
2869 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
2871 if (t
->to_fileio_open
!= NULL
)
2873 int fd
= t
->to_fileio_open (t
, inf
, filename
, flags
, mode
,
2874 warn_if_slow
, target_errno
);
2879 fd
= acquire_fileio_fd (t
, fd
);
2882 fprintf_unfiltered (gdb_stdlog
,
2883 "target_fileio_open (%d,%s,0x%x,0%o,%d)"
2885 inf
== NULL
? 0 : inf
->num
,
2886 filename
, flags
, mode
,
2888 fd
!= -1 ? 0 : *target_errno
);
2893 *target_errno
= FILEIO_ENOSYS
;
2900 target_fileio_open (struct inferior
*inf
, const char *filename
,
2901 int flags
, int mode
, int *target_errno
)
2903 return target_fileio_open_1 (inf
, filename
, flags
, mode
, 0,
2910 target_fileio_open_warn_if_slow (struct inferior
*inf
,
2911 const char *filename
,
2912 int flags
, int mode
, int *target_errno
)
2914 return target_fileio_open_1 (inf
, filename
, flags
, mode
, 1,
2921 target_fileio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
2922 ULONGEST offset
, int *target_errno
)
2924 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
2927 if (is_closed_fileio_fh (fh
->fd
))
2928 *target_errno
= EBADF
;
2930 ret
= fh
->t
->to_fileio_pwrite (fh
->t
, fh
->fd
, write_buf
,
2931 len
, offset
, target_errno
);
2934 fprintf_unfiltered (gdb_stdlog
,
2935 "target_fileio_pwrite (%d,...,%d,%s) "
2937 fd
, len
, pulongest (offset
),
2938 ret
, ret
!= -1 ? 0 : *target_errno
);
2945 target_fileio_pread (int fd
, gdb_byte
*read_buf
, int len
,
2946 ULONGEST offset
, int *target_errno
)
2948 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
2951 if (is_closed_fileio_fh (fh
->fd
))
2952 *target_errno
= EBADF
;
2954 ret
= fh
->t
->to_fileio_pread (fh
->t
, fh
->fd
, read_buf
,
2955 len
, offset
, target_errno
);
2958 fprintf_unfiltered (gdb_stdlog
,
2959 "target_fileio_pread (%d,...,%d,%s) "
2961 fd
, len
, pulongest (offset
),
2962 ret
, ret
!= -1 ? 0 : *target_errno
);
2969 target_fileio_fstat (int fd
, struct stat
*sb
, int *target_errno
)
2971 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
2974 if (is_closed_fileio_fh (fh
->fd
))
2975 *target_errno
= EBADF
;
2977 ret
= fh
->t
->to_fileio_fstat (fh
->t
, fh
->fd
, sb
, target_errno
);
2980 fprintf_unfiltered (gdb_stdlog
,
2981 "target_fileio_fstat (%d) = %d (%d)\n",
2982 fd
, ret
, ret
!= -1 ? 0 : *target_errno
);
2989 target_fileio_close (int fd
, int *target_errno
)
2991 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
2994 if (is_closed_fileio_fh (fh
->fd
))
2995 *target_errno
= EBADF
;
2998 ret
= fh
->t
->to_fileio_close (fh
->t
, fh
->fd
, target_errno
);
2999 release_fileio_fd (fd
, fh
);
3003 fprintf_unfiltered (gdb_stdlog
,
3004 "target_fileio_close (%d) = %d (%d)\n",
3005 fd
, ret
, ret
!= -1 ? 0 : *target_errno
);
3012 target_fileio_unlink (struct inferior
*inf
, const char *filename
,
3015 struct target_ops
*t
;
3017 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
3019 if (t
->to_fileio_unlink
!= NULL
)
3021 int ret
= t
->to_fileio_unlink (t
, inf
, filename
,
3025 fprintf_unfiltered (gdb_stdlog
,
3026 "target_fileio_unlink (%d,%s)"
3028 inf
== NULL
? 0 : inf
->num
, filename
,
3029 ret
, ret
!= -1 ? 0 : *target_errno
);
3034 *target_errno
= FILEIO_ENOSYS
;
3041 target_fileio_readlink (struct inferior
*inf
, const char *filename
,
3044 struct target_ops
*t
;
3046 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
3048 if (t
->to_fileio_readlink
!= NULL
)
3050 char *ret
= t
->to_fileio_readlink (t
, inf
, filename
,
3054 fprintf_unfiltered (gdb_stdlog
,
3055 "target_fileio_readlink (%d,%s)"
3057 inf
== NULL
? 0 : inf
->num
,
3058 filename
, ret
? ret
: "(nil)",
3059 ret
? 0 : *target_errno
);
3064 *target_errno
= FILEIO_ENOSYS
;
3069 target_fileio_close_cleanup (void *opaque
)
3071 int fd
= *(int *) opaque
;
3074 target_fileio_close (fd
, &target_errno
);
3077 /* Read target file FILENAME, in the filesystem as seen by INF. If
3078 INF is NULL, use the filesystem seen by the debugger (GDB or, for
3079 remote targets, the remote stub). Store the result in *BUF_P and
3080 return the size of the transferred data. PADDING additional bytes
3081 are available in *BUF_P. This is a helper function for
3082 target_fileio_read_alloc; see the declaration of that function for
3083 more information. */
3086 target_fileio_read_alloc_1 (struct inferior
*inf
, const char *filename
,
3087 gdb_byte
**buf_p
, int padding
)
3089 struct cleanup
*close_cleanup
;
3090 size_t buf_alloc
, buf_pos
;
3096 fd
= target_fileio_open (inf
, filename
, FILEIO_O_RDONLY
, 0700,
3101 close_cleanup
= make_cleanup (target_fileio_close_cleanup
, &fd
);
3103 /* Start by reading up to 4K at a time. The target will throttle
3104 this number down if necessary. */
3106 buf
= (gdb_byte
*) xmalloc (buf_alloc
);
3110 n
= target_fileio_pread (fd
, &buf
[buf_pos
],
3111 buf_alloc
- buf_pos
- padding
, buf_pos
,
3115 /* An error occurred. */
3116 do_cleanups (close_cleanup
);
3122 /* Read all there was. */
3123 do_cleanups (close_cleanup
);
3133 /* If the buffer is filling up, expand it. */
3134 if (buf_alloc
< buf_pos
* 2)
3137 buf
= (gdb_byte
*) xrealloc (buf
, buf_alloc
);
3147 target_fileio_read_alloc (struct inferior
*inf
, const char *filename
,
3150 return target_fileio_read_alloc_1 (inf
, filename
, buf_p
, 0);
3156 target_fileio_read_stralloc (struct inferior
*inf
, const char *filename
)
3160 LONGEST i
, transferred
;
3162 transferred
= target_fileio_read_alloc_1 (inf
, filename
, &buffer
, 1);
3163 bufstr
= (char *) buffer
;
3165 if (transferred
< 0)
3168 if (transferred
== 0)
3169 return xstrdup ("");
3171 bufstr
[transferred
] = 0;
3173 /* Check for embedded NUL bytes; but allow trailing NULs. */
3174 for (i
= strlen (bufstr
); i
< transferred
; i
++)
3177 warning (_("target file %s "
3178 "contained unexpected null characters"),
3188 default_region_ok_for_hw_watchpoint (struct target_ops
*self
,
3189 CORE_ADDR addr
, int len
)
3191 return (len
<= gdbarch_ptr_bit (target_gdbarch ()) / TARGET_CHAR_BIT
);
3195 default_watchpoint_addr_within_range (struct target_ops
*target
,
3197 CORE_ADDR start
, int length
)
3199 return addr
>= start
&& addr
< start
+ length
;
3202 static struct gdbarch
*
3203 default_thread_architecture (struct target_ops
*ops
, ptid_t ptid
)
3205 return target_gdbarch ();
3209 return_zero (struct target_ops
*ignore
)
3215 return_zero_has_execution (struct target_ops
*ignore
, ptid_t ignore2
)
3221 * Find the next target down the stack from the specified target.
3225 find_target_beneath (struct target_ops
*t
)
3233 find_target_at (enum strata stratum
)
3235 struct target_ops
*t
;
3237 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3238 if (t
->to_stratum
== stratum
)
3249 target_announce_detach (int from_tty
)
3257 exec_file
= get_exec_file (0);
3258 if (exec_file
== NULL
)
3261 pid
= ptid_get_pid (inferior_ptid
);
3262 printf_unfiltered (_("Detaching from program: %s, %s\n"), exec_file
,
3263 target_pid_to_str (pid_to_ptid (pid
)));
3264 gdb_flush (gdb_stdout
);
3267 /* The inferior process has died. Long live the inferior! */
3270 generic_mourn_inferior (void)
3274 ptid
= inferior_ptid
;
3275 inferior_ptid
= null_ptid
;
3277 /* Mark breakpoints uninserted in case something tries to delete a
3278 breakpoint while we delete the inferior's threads (which would
3279 fail, since the inferior is long gone). */
3280 mark_breakpoints_out ();
3282 if (!ptid_equal (ptid
, null_ptid
))
3284 int pid
= ptid_get_pid (ptid
);
3285 exit_inferior (pid
);
3288 /* Note this wipes step-resume breakpoints, so needs to be done
3289 after exit_inferior, which ends up referencing the step-resume
3290 breakpoints through clear_thread_inferior_resources. */
3291 breakpoint_init_inferior (inf_exited
);
3293 registers_changed ();
3295 reopen_exec_file ();
3296 reinit_frame_cache ();
3298 if (deprecated_detach_hook
)
3299 deprecated_detach_hook ();
3302 /* Convert a normal process ID to a string. Returns the string in a
3306 normal_pid_to_str (ptid_t ptid
)
3308 static char buf
[32];
3310 xsnprintf (buf
, sizeof buf
, "process %d", ptid_get_pid (ptid
));
3315 default_pid_to_str (struct target_ops
*ops
, ptid_t ptid
)
3317 return normal_pid_to_str (ptid
);
3320 /* Error-catcher for target_find_memory_regions. */
3322 dummy_find_memory_regions (struct target_ops
*self
,
3323 find_memory_region_ftype ignore1
, void *ignore2
)
3325 error (_("Command not implemented for this target."));
3329 /* Error-catcher for target_make_corefile_notes. */
3331 dummy_make_corefile_notes (struct target_ops
*self
,
3332 bfd
*ignore1
, int *ignore2
)
3334 error (_("Command not implemented for this target."));
3338 /* Set up the handful of non-empty slots needed by the dummy target
3342 init_dummy_target (void)
3344 dummy_target
.to_shortname
= "None";
3345 dummy_target
.to_longname
= "None";
3346 dummy_target
.to_doc
= "";
3347 dummy_target
.to_supports_disable_randomization
3348 = find_default_supports_disable_randomization
;
3349 dummy_target
.to_stratum
= dummy_stratum
;
3350 dummy_target
.to_has_all_memory
= return_zero
;
3351 dummy_target
.to_has_memory
= return_zero
;
3352 dummy_target
.to_has_stack
= return_zero
;
3353 dummy_target
.to_has_registers
= return_zero
;
3354 dummy_target
.to_has_execution
= return_zero_has_execution
;
3355 dummy_target
.to_magic
= OPS_MAGIC
;
3357 install_dummy_methods (&dummy_target
);
3362 target_close (struct target_ops
*targ
)
3364 gdb_assert (!target_is_pushed (targ
));
3366 if (targ
->to_xclose
!= NULL
)
3367 targ
->to_xclose (targ
);
3368 else if (targ
->to_close
!= NULL
)
3369 targ
->to_close (targ
);
3372 fprintf_unfiltered (gdb_stdlog
, "target_close ()\n");
3376 target_thread_alive (ptid_t ptid
)
3378 return current_target
.to_thread_alive (¤t_target
, ptid
);
3382 target_update_thread_list (void)
3384 current_target
.to_update_thread_list (¤t_target
);
3388 target_stop (ptid_t ptid
)
3392 warning (_("May not interrupt or stop the target, ignoring attempt"));
3396 (*current_target
.to_stop
) (¤t_target
, ptid
);
3400 target_interrupt (ptid_t ptid
)
3404 warning (_("May not interrupt or stop the target, ignoring attempt"));
3408 (*current_target
.to_interrupt
) (¤t_target
, ptid
);
3414 target_pass_ctrlc (void)
3416 (*current_target
.to_pass_ctrlc
) (¤t_target
);
3422 default_target_pass_ctrlc (struct target_ops
*ops
)
3424 target_interrupt (inferior_ptid
);
3427 /* See target/target.h. */
3430 target_stop_and_wait (ptid_t ptid
)
3432 struct target_waitstatus status
;
3433 int was_non_stop
= non_stop
;
3438 memset (&status
, 0, sizeof (status
));
3439 target_wait (ptid
, &status
, 0);
3441 non_stop
= was_non_stop
;
3444 /* See target/target.h. */
3447 target_continue_no_signal (ptid_t ptid
)
3449 target_resume (ptid
, 0, GDB_SIGNAL_0
);
3452 /* See target/target.h. */
3455 target_continue (ptid_t ptid
, enum gdb_signal signal
)
3457 target_resume (ptid
, 0, signal
);
3460 /* Concatenate ELEM to LIST, a comma separate list, and return the
3461 result. The LIST incoming argument is released. */
3464 str_comma_list_concat_elem (char *list
, const char *elem
)
3467 return xstrdup (elem
);
3469 return reconcat (list
, list
, ", ", elem
, (char *) NULL
);
3472 /* Helper for target_options_to_string. If OPT is present in
3473 TARGET_OPTIONS, append the OPT_STR (string version of OPT) in RET.
3474 Returns the new resulting string. OPT is removed from
3478 do_option (int *target_options
, char *ret
,
3479 int opt
, char *opt_str
)
3481 if ((*target_options
& opt
) != 0)
3483 ret
= str_comma_list_concat_elem (ret
, opt_str
);
3484 *target_options
&= ~opt
;
3491 target_options_to_string (int target_options
)
3495 #define DO_TARG_OPTION(OPT) \
3496 ret = do_option (&target_options, ret, OPT, #OPT)
3498 DO_TARG_OPTION (TARGET_WNOHANG
);
3500 if (target_options
!= 0)
3501 ret
= str_comma_list_concat_elem (ret
, "unknown???");
3509 debug_print_register (const char * func
,
3510 struct regcache
*regcache
, int regno
)
3512 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
3514 fprintf_unfiltered (gdb_stdlog
, "%s ", func
);
3515 if (regno
>= 0 && regno
< gdbarch_num_regs (gdbarch
)
3516 && gdbarch_register_name (gdbarch
, regno
) != NULL
3517 && gdbarch_register_name (gdbarch
, regno
)[0] != '\0')
3518 fprintf_unfiltered (gdb_stdlog
, "(%s)",
3519 gdbarch_register_name (gdbarch
, regno
));
3521 fprintf_unfiltered (gdb_stdlog
, "(%d)", regno
);
3522 if (regno
>= 0 && regno
< gdbarch_num_regs (gdbarch
))
3524 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
3525 int i
, size
= register_size (gdbarch
, regno
);
3526 gdb_byte buf
[MAX_REGISTER_SIZE
];
3528 regcache_raw_collect (regcache
, regno
, buf
);
3529 fprintf_unfiltered (gdb_stdlog
, " = ");
3530 for (i
= 0; i
< size
; i
++)
3532 fprintf_unfiltered (gdb_stdlog
, "%02x", buf
[i
]);
3534 if (size
<= sizeof (LONGEST
))
3536 ULONGEST val
= extract_unsigned_integer (buf
, size
, byte_order
);
3538 fprintf_unfiltered (gdb_stdlog
, " %s %s",
3539 core_addr_to_string_nz (val
), plongest (val
));
3542 fprintf_unfiltered (gdb_stdlog
, "\n");
3546 target_fetch_registers (struct regcache
*regcache
, int regno
)
3548 current_target
.to_fetch_registers (¤t_target
, regcache
, regno
);
3550 debug_print_register ("target_fetch_registers", regcache
, regno
);
3554 target_store_registers (struct regcache
*regcache
, int regno
)
3556 if (!may_write_registers
)
3557 error (_("Writing to registers is not allowed (regno %d)"), regno
);
3559 current_target
.to_store_registers (¤t_target
, regcache
, regno
);
3562 debug_print_register ("target_store_registers", regcache
, regno
);
3567 target_core_of_thread (ptid_t ptid
)
3569 return current_target
.to_core_of_thread (¤t_target
, ptid
);
3573 simple_verify_memory (struct target_ops
*ops
,
3574 const gdb_byte
*data
, CORE_ADDR lma
, ULONGEST size
)
3576 LONGEST total_xfered
= 0;
3578 while (total_xfered
< size
)
3580 ULONGEST xfered_len
;
3581 enum target_xfer_status status
;
3583 ULONGEST howmuch
= min (sizeof (buf
), size
- total_xfered
);
3585 status
= target_xfer_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
3586 buf
, NULL
, lma
+ total_xfered
, howmuch
,
3588 if (status
== TARGET_XFER_OK
3589 && memcmp (data
+ total_xfered
, buf
, xfered_len
) == 0)
3591 total_xfered
+= xfered_len
;
3600 /* Default implementation of memory verification. */
3603 default_verify_memory (struct target_ops
*self
,
3604 const gdb_byte
*data
, CORE_ADDR memaddr
, ULONGEST size
)
3606 /* Start over from the top of the target stack. */
3607 return simple_verify_memory (current_target
.beneath
,
3608 data
, memaddr
, size
);
3612 target_verify_memory (const gdb_byte
*data
, CORE_ADDR memaddr
, ULONGEST size
)
3614 return current_target
.to_verify_memory (¤t_target
,
3615 data
, memaddr
, size
);
3618 /* The documentation for this function is in its prototype declaration in
3622 target_insert_mask_watchpoint (CORE_ADDR addr
, CORE_ADDR mask
,
3623 enum target_hw_bp_type rw
)
3625 return current_target
.to_insert_mask_watchpoint (¤t_target
,
3629 /* The documentation for this function is in its prototype declaration in
3633 target_remove_mask_watchpoint (CORE_ADDR addr
, CORE_ADDR mask
,
3634 enum target_hw_bp_type rw
)
3636 return current_target
.to_remove_mask_watchpoint (¤t_target
,
3640 /* The documentation for this function is in its prototype declaration
3644 target_masked_watch_num_registers (CORE_ADDR addr
, CORE_ADDR mask
)
3646 return current_target
.to_masked_watch_num_registers (¤t_target
,
3650 /* The documentation for this function is in its prototype declaration
3654 target_ranged_break_num_registers (void)
3656 return current_target
.to_ranged_break_num_registers (¤t_target
);
3662 target_supports_btrace (enum btrace_format format
)
3664 return current_target
.to_supports_btrace (¤t_target
, format
);
3669 struct btrace_target_info
*
3670 target_enable_btrace (ptid_t ptid
, const struct btrace_config
*conf
)
3672 return current_target
.to_enable_btrace (¤t_target
, ptid
, conf
);
3678 target_disable_btrace (struct btrace_target_info
*btinfo
)
3680 current_target
.to_disable_btrace (¤t_target
, btinfo
);
3686 target_teardown_btrace (struct btrace_target_info
*btinfo
)
3688 current_target
.to_teardown_btrace (¤t_target
, btinfo
);
3694 target_read_btrace (struct btrace_data
*btrace
,
3695 struct btrace_target_info
*btinfo
,
3696 enum btrace_read_type type
)
3698 return current_target
.to_read_btrace (¤t_target
, btrace
, btinfo
, type
);
3703 const struct btrace_config
*
3704 target_btrace_conf (const struct btrace_target_info
*btinfo
)
3706 return current_target
.to_btrace_conf (¤t_target
, btinfo
);
3712 target_stop_recording (void)
3714 current_target
.to_stop_recording (¤t_target
);
3720 target_save_record (const char *filename
)
3722 current_target
.to_save_record (¤t_target
, filename
);
3728 target_supports_delete_record (void)
3730 struct target_ops
*t
;
3732 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3733 if (t
->to_delete_record
!= delegate_delete_record
3734 && t
->to_delete_record
!= tdefault_delete_record
)
3743 target_delete_record (void)
3745 current_target
.to_delete_record (¤t_target
);
3751 target_record_is_replaying (ptid_t ptid
)
3753 return current_target
.to_record_is_replaying (¤t_target
, ptid
);
3759 target_record_will_replay (ptid_t ptid
, int dir
)
3761 return current_target
.to_record_will_replay (¤t_target
, ptid
, dir
);
3767 target_record_stop_replaying (void)
3769 current_target
.to_record_stop_replaying (¤t_target
);
3775 target_goto_record_begin (void)
3777 current_target
.to_goto_record_begin (¤t_target
);
3783 target_goto_record_end (void)
3785 current_target
.to_goto_record_end (¤t_target
);
3791 target_goto_record (ULONGEST insn
)
3793 current_target
.to_goto_record (¤t_target
, insn
);
3799 target_insn_history (int size
, int flags
)
3801 current_target
.to_insn_history (¤t_target
, size
, flags
);
3807 target_insn_history_from (ULONGEST from
, int size
, int flags
)
3809 current_target
.to_insn_history_from (¤t_target
, from
, size
, flags
);
3815 target_insn_history_range (ULONGEST begin
, ULONGEST end
, int flags
)
3817 current_target
.to_insn_history_range (¤t_target
, begin
, end
, flags
);
3823 target_call_history (int size
, int flags
)
3825 current_target
.to_call_history (¤t_target
, size
, flags
);
3831 target_call_history_from (ULONGEST begin
, int size
, int flags
)
3833 current_target
.to_call_history_from (¤t_target
, begin
, size
, flags
);
3839 target_call_history_range (ULONGEST begin
, ULONGEST end
, int flags
)
3841 current_target
.to_call_history_range (¤t_target
, begin
, end
, flags
);
3846 const struct frame_unwind
*
3847 target_get_unwinder (void)
3849 return current_target
.to_get_unwinder (¤t_target
);
3854 const struct frame_unwind
*
3855 target_get_tailcall_unwinder (void)
3857 return current_target
.to_get_tailcall_unwinder (¤t_target
);
3863 target_prepare_to_generate_core (void)
3865 current_target
.to_prepare_to_generate_core (¤t_target
);
3871 target_done_generating_core (void)
3873 current_target
.to_done_generating_core (¤t_target
);
3877 setup_target_debug (void)
3879 memcpy (&debug_target
, ¤t_target
, sizeof debug_target
);
3881 init_debug_target (¤t_target
);
3885 static char targ_desc
[] =
3886 "Names of targets and files being debugged.\nShows the entire \
3887 stack of targets currently in use (including the exec-file,\n\
3888 core-file, and process, if any), as well as the symbol file name.";
3891 default_rcmd (struct target_ops
*self
, const char *command
,
3892 struct ui_file
*output
)
3894 error (_("\"monitor\" command not supported by this target."));
3898 do_monitor_command (char *cmd
,
3901 target_rcmd (cmd
, gdb_stdtarg
);
3904 /* Print the name of each layers of our target stack. */
3907 maintenance_print_target_stack (char *cmd
, int from_tty
)
3909 struct target_ops
*t
;
3911 printf_filtered (_("The current target stack is:\n"));
3913 for (t
= target_stack
; t
!= NULL
; t
= t
->beneath
)
3915 printf_filtered (" - %s (%s)\n", t
->to_shortname
, t
->to_longname
);
3922 target_async (int enable
)
3924 infrun_async (enable
);
3925 current_target
.to_async (¤t_target
, enable
);
3931 target_thread_events (int enable
)
3933 current_target
.to_thread_events (¤t_target
, enable
);
3936 /* Controls if targets can report that they can/are async. This is
3937 just for maintainers to use when debugging gdb. */
3938 int target_async_permitted
= 1;
3940 /* The set command writes to this variable. If the inferior is
3941 executing, target_async_permitted is *not* updated. */
3942 static int target_async_permitted_1
= 1;
3945 maint_set_target_async_command (char *args
, int from_tty
,
3946 struct cmd_list_element
*c
)
3948 if (have_live_inferiors ())
3950 target_async_permitted_1
= target_async_permitted
;
3951 error (_("Cannot change this setting while the inferior is running."));
3954 target_async_permitted
= target_async_permitted_1
;
3958 maint_show_target_async_command (struct ui_file
*file
, int from_tty
,
3959 struct cmd_list_element
*c
,
3962 fprintf_filtered (file
,
3963 _("Controlling the inferior in "
3964 "asynchronous mode is %s.\n"), value
);
3967 /* Return true if the target operates in non-stop mode even with "set
3971 target_always_non_stop_p (void)
3973 return current_target
.to_always_non_stop_p (¤t_target
);
3979 target_is_non_stop_p (void)
3982 || target_non_stop_enabled
== AUTO_BOOLEAN_TRUE
3983 || (target_non_stop_enabled
== AUTO_BOOLEAN_AUTO
3984 && target_always_non_stop_p ()));
3987 /* Controls if targets can report that they always run in non-stop
3988 mode. This is just for maintainers to use when debugging gdb. */
3989 enum auto_boolean target_non_stop_enabled
= AUTO_BOOLEAN_AUTO
;
3991 /* The set command writes to this variable. If the inferior is
3992 executing, target_non_stop_enabled is *not* updated. */
3993 static enum auto_boolean target_non_stop_enabled_1
= AUTO_BOOLEAN_AUTO
;
3995 /* Implementation of "maint set target-non-stop". */
3998 maint_set_target_non_stop_command (char *args
, int from_tty
,
3999 struct cmd_list_element
*c
)
4001 if (have_live_inferiors ())
4003 target_non_stop_enabled_1
= target_non_stop_enabled
;
4004 error (_("Cannot change this setting while the inferior is running."));
4007 target_non_stop_enabled
= target_non_stop_enabled_1
;
4010 /* Implementation of "maint show target-non-stop". */
4013 maint_show_target_non_stop_command (struct ui_file
*file
, int from_tty
,
4014 struct cmd_list_element
*c
,
4017 if (target_non_stop_enabled
== AUTO_BOOLEAN_AUTO
)
4018 fprintf_filtered (file
,
4019 _("Whether the target is always in non-stop mode "
4020 "is %s (currently %s).\n"), value
,
4021 target_always_non_stop_p () ? "on" : "off");
4023 fprintf_filtered (file
,
4024 _("Whether the target is always in non-stop mode "
4025 "is %s.\n"), value
);
4028 /* Temporary copies of permission settings. */
4030 static int may_write_registers_1
= 1;
4031 static int may_write_memory_1
= 1;
4032 static int may_insert_breakpoints_1
= 1;
4033 static int may_insert_tracepoints_1
= 1;
4034 static int may_insert_fast_tracepoints_1
= 1;
4035 static int may_stop_1
= 1;
4037 /* Make the user-set values match the real values again. */
4040 update_target_permissions (void)
4042 may_write_registers_1
= may_write_registers
;
4043 may_write_memory_1
= may_write_memory
;
4044 may_insert_breakpoints_1
= may_insert_breakpoints
;
4045 may_insert_tracepoints_1
= may_insert_tracepoints
;
4046 may_insert_fast_tracepoints_1
= may_insert_fast_tracepoints
;
4047 may_stop_1
= may_stop
;
4050 /* The one function handles (most of) the permission flags in the same
4054 set_target_permissions (char *args
, int from_tty
,
4055 struct cmd_list_element
*c
)
4057 if (target_has_execution
)
4059 update_target_permissions ();
4060 error (_("Cannot change this setting while the inferior is running."));
4063 /* Make the real values match the user-changed values. */
4064 may_write_registers
= may_write_registers_1
;
4065 may_insert_breakpoints
= may_insert_breakpoints_1
;
4066 may_insert_tracepoints
= may_insert_tracepoints_1
;
4067 may_insert_fast_tracepoints
= may_insert_fast_tracepoints_1
;
4068 may_stop
= may_stop_1
;
4069 update_observer_mode ();
4072 /* Set memory write permission independently of observer mode. */
4075 set_write_memory_permission (char *args
, int from_tty
,
4076 struct cmd_list_element
*c
)
4078 /* Make the real values match the user-changed values. */
4079 may_write_memory
= may_write_memory_1
;
4080 update_observer_mode ();
4085 initialize_targets (void)
4087 init_dummy_target ();
4088 push_target (&dummy_target
);
4090 add_info ("target", target_info
, targ_desc
);
4091 add_info ("files", target_info
, targ_desc
);
4093 add_setshow_zuinteger_cmd ("target", class_maintenance
, &targetdebug
, _("\
4094 Set target debugging."), _("\
4095 Show target debugging."), _("\
4096 When non-zero, target debugging is enabled. Higher numbers are more\n\
4100 &setdebuglist
, &showdebuglist
);
4102 add_setshow_boolean_cmd ("trust-readonly-sections", class_support
,
4103 &trust_readonly
, _("\
4104 Set mode for reading from readonly sections."), _("\
4105 Show mode for reading from readonly sections."), _("\
4106 When this mode is on, memory reads from readonly sections (such as .text)\n\
4107 will be read from the object file instead of from the target. This will\n\
4108 result in significant performance improvement for remote targets."),
4110 show_trust_readonly
,
4111 &setlist
, &showlist
);
4113 add_com ("monitor", class_obscure
, do_monitor_command
,
4114 _("Send a command to the remote monitor (remote targets only)."));
4116 add_cmd ("target-stack", class_maintenance
, maintenance_print_target_stack
,
4117 _("Print the name of each layer of the internal target stack."),
4118 &maintenanceprintlist
);
4120 add_setshow_boolean_cmd ("target-async", no_class
,
4121 &target_async_permitted_1
, _("\
4122 Set whether gdb controls the inferior in asynchronous mode."), _("\
4123 Show whether gdb controls the inferior in asynchronous mode."), _("\
4124 Tells gdb whether to control the inferior in asynchronous mode."),
4125 maint_set_target_async_command
,
4126 maint_show_target_async_command
,
4127 &maintenance_set_cmdlist
,
4128 &maintenance_show_cmdlist
);
4130 add_setshow_auto_boolean_cmd ("target-non-stop", no_class
,
4131 &target_non_stop_enabled_1
, _("\
4132 Set whether gdb always controls the inferior in non-stop mode."), _("\
4133 Show whether gdb always controls the inferior in non-stop mode."), _("\
4134 Tells gdb whether to control the inferior in non-stop mode."),
4135 maint_set_target_non_stop_command
,
4136 maint_show_target_non_stop_command
,
4137 &maintenance_set_cmdlist
,
4138 &maintenance_show_cmdlist
);
4140 add_setshow_boolean_cmd ("may-write-registers", class_support
,
4141 &may_write_registers_1
, _("\
4142 Set permission to write into registers."), _("\
4143 Show permission to write into registers."), _("\
4144 When this permission is on, GDB may write into the target's registers.\n\
4145 Otherwise, any sort of write attempt will result in an error."),
4146 set_target_permissions
, NULL
,
4147 &setlist
, &showlist
);
4149 add_setshow_boolean_cmd ("may-write-memory", class_support
,
4150 &may_write_memory_1
, _("\
4151 Set permission to write into target memory."), _("\
4152 Show permission to write into target memory."), _("\
4153 When this permission is on, GDB may write into the target's memory.\n\
4154 Otherwise, any sort of write attempt will result in an error."),
4155 set_write_memory_permission
, NULL
,
4156 &setlist
, &showlist
);
4158 add_setshow_boolean_cmd ("may-insert-breakpoints", class_support
,
4159 &may_insert_breakpoints_1
, _("\
4160 Set permission to insert breakpoints in the target."), _("\
4161 Show permission to insert breakpoints in the target."), _("\
4162 When this permission is on, GDB may insert breakpoints in the program.\n\
4163 Otherwise, any sort of insertion attempt will result in an error."),
4164 set_target_permissions
, NULL
,
4165 &setlist
, &showlist
);
4167 add_setshow_boolean_cmd ("may-insert-tracepoints", class_support
,
4168 &may_insert_tracepoints_1
, _("\
4169 Set permission to insert tracepoints in the target."), _("\
4170 Show permission to insert tracepoints in the target."), _("\
4171 When this permission is on, GDB may insert tracepoints in the program.\n\
4172 Otherwise, any sort of insertion attempt will result in an error."),
4173 set_target_permissions
, NULL
,
4174 &setlist
, &showlist
);
4176 add_setshow_boolean_cmd ("may-insert-fast-tracepoints", class_support
,
4177 &may_insert_fast_tracepoints_1
, _("\
4178 Set permission to insert fast tracepoints in the target."), _("\
4179 Show permission to insert fast tracepoints in the target."), _("\
4180 When this permission is on, GDB may insert fast tracepoints.\n\
4181 Otherwise, any sort of insertion attempt will result in an error."),
4182 set_target_permissions
, NULL
,
4183 &setlist
, &showlist
);
4185 add_setshow_boolean_cmd ("may-interrupt", class_support
,
4187 Set permission to interrupt or signal the target."), _("\
4188 Show permission to interrupt or signal the target."), _("\
4189 When this permission is on, GDB may interrupt/stop the target's execution.\n\
4190 Otherwise, any attempt to interrupt or stop will be ignored."),
4191 set_target_permissions
, NULL
,
4192 &setlist
, &showlist
);
4194 add_setshow_boolean_cmd ("auto-connect-native-target", class_support
,
4195 &auto_connect_native_target
, _("\
4196 Set whether GDB may automatically connect to the native target."), _("\
4197 Show whether GDB may automatically connect to the native target."), _("\
4198 When on, and GDB is not connected to a target yet, GDB\n\
4199 attempts \"run\" and other commands with the native target."),
4200 NULL
, show_auto_connect_native_target
,
4201 &setlist
, &showlist
);