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
);
2286 /* See target/target.h. */
2289 target_wait (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
2291 return (current_target
.to_wait
) (¤t_target
, ptid
, status
, options
);
2297 default_target_wait (struct target_ops
*ops
,
2298 ptid_t ptid
, struct target_waitstatus
*status
,
2301 status
->kind
= TARGET_WAITKIND_IGNORE
;
2302 return minus_one_ptid
;
2306 target_pid_to_str (ptid_t ptid
)
2308 return (*current_target
.to_pid_to_str
) (¤t_target
, ptid
);
2312 target_thread_name (struct thread_info
*info
)
2314 return current_target
.to_thread_name (¤t_target
, info
);
2318 target_resume (ptid_t ptid
, int step
, enum gdb_signal signal
)
2320 target_dcache_invalidate ();
2322 current_target
.to_resume (¤t_target
, ptid
, step
, signal
);
2324 registers_changed_ptid (ptid
);
2325 /* We only set the internal executing state here. The user/frontend
2326 running state is set at a higher level. */
2327 set_executing (ptid
, 1);
2328 clear_inline_frame_state (ptid
);
2332 target_pass_signals (int numsigs
, unsigned char *pass_signals
)
2334 (*current_target
.to_pass_signals
) (¤t_target
, numsigs
, pass_signals
);
2338 target_program_signals (int numsigs
, unsigned char *program_signals
)
2340 (*current_target
.to_program_signals
) (¤t_target
,
2341 numsigs
, program_signals
);
2345 default_follow_fork (struct target_ops
*self
, int follow_child
,
2348 /* Some target returned a fork event, but did not know how to follow it. */
2349 internal_error (__FILE__
, __LINE__
,
2350 _("could not find a target to follow fork"));
2353 /* Look through the list of possible targets for a target that can
2357 target_follow_fork (int follow_child
, int detach_fork
)
2359 return current_target
.to_follow_fork (¤t_target
,
2360 follow_child
, detach_fork
);
2363 /* Target wrapper for follow exec hook. */
2366 target_follow_exec (struct inferior
*inf
, char *execd_pathname
)
2368 current_target
.to_follow_exec (¤t_target
, inf
, execd_pathname
);
2372 default_mourn_inferior (struct target_ops
*self
)
2374 internal_error (__FILE__
, __LINE__
,
2375 _("could not find a target to follow mourn inferior"));
2379 target_mourn_inferior (void)
2381 current_target
.to_mourn_inferior (¤t_target
);
2383 /* We no longer need to keep handles on any of the object files.
2384 Make sure to release them to avoid unnecessarily locking any
2385 of them while we're not actually debugging. */
2386 bfd_cache_close_all ();
2389 /* Look for a target which can describe architectural features, starting
2390 from TARGET. If we find one, return its description. */
2392 const struct target_desc
*
2393 target_read_description (struct target_ops
*target
)
2395 return target
->to_read_description (target
);
2398 /* This implements a basic search of memory, reading target memory and
2399 performing the search here (as opposed to performing the search in on the
2400 target side with, for example, gdbserver). */
2403 simple_search_memory (struct target_ops
*ops
,
2404 CORE_ADDR start_addr
, ULONGEST search_space_len
,
2405 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2406 CORE_ADDR
*found_addrp
)
2408 /* NOTE: also defined in find.c testcase. */
2409 #define SEARCH_CHUNK_SIZE 16000
2410 const unsigned chunk_size
= SEARCH_CHUNK_SIZE
;
2411 /* Buffer to hold memory contents for searching. */
2412 gdb_byte
*search_buf
;
2413 unsigned search_buf_size
;
2414 struct cleanup
*old_cleanups
;
2416 search_buf_size
= chunk_size
+ pattern_len
- 1;
2418 /* No point in trying to allocate a buffer larger than the search space. */
2419 if (search_space_len
< search_buf_size
)
2420 search_buf_size
= search_space_len
;
2422 search_buf
= (gdb_byte
*) malloc (search_buf_size
);
2423 if (search_buf
== NULL
)
2424 error (_("Unable to allocate memory to perform the search."));
2425 old_cleanups
= make_cleanup (free_current_contents
, &search_buf
);
2427 /* Prime the search buffer. */
2429 if (target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2430 search_buf
, start_addr
, search_buf_size
) != search_buf_size
)
2432 warning (_("Unable to access %s bytes of target "
2433 "memory at %s, halting search."),
2434 pulongest (search_buf_size
), hex_string (start_addr
));
2435 do_cleanups (old_cleanups
);
2439 /* Perform the search.
2441 The loop is kept simple by allocating [N + pattern-length - 1] bytes.
2442 When we've scanned N bytes we copy the trailing bytes to the start and
2443 read in another N bytes. */
2445 while (search_space_len
>= pattern_len
)
2447 gdb_byte
*found_ptr
;
2448 unsigned nr_search_bytes
= min (search_space_len
, search_buf_size
);
2450 found_ptr
= (gdb_byte
*) memmem (search_buf
, nr_search_bytes
,
2451 pattern
, pattern_len
);
2453 if (found_ptr
!= NULL
)
2455 CORE_ADDR found_addr
= start_addr
+ (found_ptr
- search_buf
);
2457 *found_addrp
= found_addr
;
2458 do_cleanups (old_cleanups
);
2462 /* Not found in this chunk, skip to next chunk. */
2464 /* Don't let search_space_len wrap here, it's unsigned. */
2465 if (search_space_len
>= chunk_size
)
2466 search_space_len
-= chunk_size
;
2468 search_space_len
= 0;
2470 if (search_space_len
>= pattern_len
)
2472 unsigned keep_len
= search_buf_size
- chunk_size
;
2473 CORE_ADDR read_addr
= start_addr
+ chunk_size
+ keep_len
;
2476 /* Copy the trailing part of the previous iteration to the front
2477 of the buffer for the next iteration. */
2478 gdb_assert (keep_len
== pattern_len
- 1);
2479 memcpy (search_buf
, search_buf
+ chunk_size
, keep_len
);
2481 nr_to_read
= min (search_space_len
- keep_len
, chunk_size
);
2483 if (target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2484 search_buf
+ keep_len
, read_addr
,
2485 nr_to_read
) != nr_to_read
)
2487 warning (_("Unable to access %s bytes of target "
2488 "memory at %s, halting search."),
2489 plongest (nr_to_read
),
2490 hex_string (read_addr
));
2491 do_cleanups (old_cleanups
);
2495 start_addr
+= chunk_size
;
2501 do_cleanups (old_cleanups
);
2505 /* Default implementation of memory-searching. */
2508 default_search_memory (struct target_ops
*self
,
2509 CORE_ADDR start_addr
, ULONGEST search_space_len
,
2510 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2511 CORE_ADDR
*found_addrp
)
2513 /* Start over from the top of the target stack. */
2514 return simple_search_memory (current_target
.beneath
,
2515 start_addr
, search_space_len
,
2516 pattern
, pattern_len
, found_addrp
);
2519 /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the
2520 sequence of bytes in PATTERN with length PATTERN_LEN.
2522 The result is 1 if found, 0 if not found, and -1 if there was an error
2523 requiring halting of the search (e.g. memory read error).
2524 If the pattern is found the address is recorded in FOUND_ADDRP. */
2527 target_search_memory (CORE_ADDR start_addr
, ULONGEST search_space_len
,
2528 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2529 CORE_ADDR
*found_addrp
)
2531 return current_target
.to_search_memory (¤t_target
, start_addr
,
2533 pattern
, pattern_len
, found_addrp
);
2536 /* Look through the currently pushed targets. If none of them will
2537 be able to restart the currently running process, issue an error
2541 target_require_runnable (void)
2543 struct target_ops
*t
;
2545 for (t
= target_stack
; t
!= NULL
; t
= t
->beneath
)
2547 /* If this target knows how to create a new program, then
2548 assume we will still be able to after killing the current
2549 one. Either killing and mourning will not pop T, or else
2550 find_default_run_target will find it again. */
2551 if (t
->to_create_inferior
!= NULL
)
2554 /* Do not worry about targets at certain strata that can not
2555 create inferiors. Assume they will be pushed again if
2556 necessary, and continue to the process_stratum. */
2557 if (t
->to_stratum
== thread_stratum
2558 || t
->to_stratum
== record_stratum
2559 || t
->to_stratum
== arch_stratum
)
2562 error (_("The \"%s\" target does not support \"run\". "
2563 "Try \"help target\" or \"continue\"."),
2567 /* This function is only called if the target is running. In that
2568 case there should have been a process_stratum target and it
2569 should either know how to create inferiors, or not... */
2570 internal_error (__FILE__
, __LINE__
, _("No targets found"));
2573 /* Whether GDB is allowed to fall back to the default run target for
2574 "run", "attach", etc. when no target is connected yet. */
2575 static int auto_connect_native_target
= 1;
2578 show_auto_connect_native_target (struct ui_file
*file
, int from_tty
,
2579 struct cmd_list_element
*c
, const char *value
)
2581 fprintf_filtered (file
,
2582 _("Whether GDB may automatically connect to the "
2583 "native target is %s.\n"),
2587 /* Look through the list of possible targets for a target that can
2588 execute a run or attach command without any other data. This is
2589 used to locate the default process stratum.
2591 If DO_MESG is not NULL, the result is always valid (error() is
2592 called for errors); else, return NULL on error. */
2594 static struct target_ops
*
2595 find_default_run_target (char *do_mesg
)
2597 struct target_ops
*runable
= NULL
;
2599 if (auto_connect_native_target
)
2601 struct target_ops
*t
;
2605 for (i
= 0; VEC_iterate (target_ops_p
, target_structs
, i
, t
); ++i
)
2607 if (t
->to_can_run
!= delegate_can_run
&& target_can_run (t
))
2618 if (runable
== NULL
)
2621 error (_("Don't know how to %s. Try \"help target\"."), do_mesg
);
2632 find_attach_target (void)
2634 struct target_ops
*t
;
2636 /* If a target on the current stack can attach, use it. */
2637 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2639 if (t
->to_attach
!= NULL
)
2643 /* Otherwise, use the default run target for attaching. */
2645 t
= find_default_run_target ("attach");
2653 find_run_target (void)
2655 struct target_ops
*t
;
2657 /* If a target on the current stack can attach, use it. */
2658 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2660 if (t
->to_create_inferior
!= NULL
)
2664 /* Otherwise, use the default run target. */
2666 t
= find_default_run_target ("run");
2671 /* Implement the "info proc" command. */
2674 target_info_proc (const char *args
, enum info_proc_what what
)
2676 struct target_ops
*t
;
2678 /* If we're already connected to something that can get us OS
2679 related data, use it. Otherwise, try using the native
2681 if (current_target
.to_stratum
>= process_stratum
)
2682 t
= current_target
.beneath
;
2684 t
= find_default_run_target (NULL
);
2686 for (; t
!= NULL
; t
= t
->beneath
)
2688 if (t
->to_info_proc
!= NULL
)
2690 t
->to_info_proc (t
, args
, what
);
2693 fprintf_unfiltered (gdb_stdlog
,
2694 "target_info_proc (\"%s\", %d)\n", args
, what
);
2704 find_default_supports_disable_randomization (struct target_ops
*self
)
2706 struct target_ops
*t
;
2708 t
= find_default_run_target (NULL
);
2709 if (t
&& t
->to_supports_disable_randomization
)
2710 return (t
->to_supports_disable_randomization
) (t
);
2715 target_supports_disable_randomization (void)
2717 struct target_ops
*t
;
2719 for (t
= ¤t_target
; t
!= NULL
; t
= t
->beneath
)
2720 if (t
->to_supports_disable_randomization
)
2721 return t
->to_supports_disable_randomization (t
);
2727 target_get_osdata (const char *type
)
2729 struct target_ops
*t
;
2731 /* If we're already connected to something that can get us OS
2732 related data, use it. Otherwise, try using the native
2734 if (current_target
.to_stratum
>= process_stratum
)
2735 t
= current_target
.beneath
;
2737 t
= find_default_run_target ("get OS data");
2742 return target_read_stralloc (t
, TARGET_OBJECT_OSDATA
, type
);
2745 static struct address_space
*
2746 default_thread_address_space (struct target_ops
*self
, ptid_t ptid
)
2748 struct inferior
*inf
;
2750 /* Fall-back to the "main" address space of the inferior. */
2751 inf
= find_inferior_ptid (ptid
);
2753 if (inf
== NULL
|| inf
->aspace
== NULL
)
2754 internal_error (__FILE__
, __LINE__
,
2755 _("Can't determine the current "
2756 "address space of thread %s\n"),
2757 target_pid_to_str (ptid
));
2762 /* Determine the current address space of thread PTID. */
2764 struct address_space
*
2765 target_thread_address_space (ptid_t ptid
)
2767 struct address_space
*aspace
;
2769 aspace
= current_target
.to_thread_address_space (¤t_target
, ptid
);
2770 gdb_assert (aspace
!= NULL
);
2776 /* Target file operations. */
2778 static struct target_ops
*
2779 default_fileio_target (void)
2781 /* If we're already connected to something that can perform
2782 file I/O, use it. Otherwise, try using the native target. */
2783 if (current_target
.to_stratum
>= process_stratum
)
2784 return current_target
.beneath
;
2786 return find_default_run_target ("file I/O");
2789 /* File handle for target file operations. */
2793 /* The target on which this file is open. */
2794 struct target_ops
*t
;
2796 /* The file descriptor on the target. */
2800 DEF_VEC_O (fileio_fh_t
);
2802 /* Vector of currently open file handles. The value returned by
2803 target_fileio_open and passed as the FD argument to other
2804 target_fileio_* functions is an index into this vector. This
2805 vector's entries are never freed; instead, files are marked as
2806 closed, and the handle becomes available for reuse. */
2807 static VEC (fileio_fh_t
) *fileio_fhandles
;
2809 /* Macro to check whether a fileio_fh_t represents a closed file. */
2810 #define is_closed_fileio_fh(fd) ((fd) < 0)
2812 /* Index into fileio_fhandles of the lowest handle that might be
2813 closed. This permits handle reuse without searching the whole
2814 list each time a new file is opened. */
2815 static int lowest_closed_fd
;
2817 /* Acquire a target fileio file descriptor. */
2820 acquire_fileio_fd (struct target_ops
*t
, int fd
)
2824 gdb_assert (!is_closed_fileio_fh (fd
));
2826 /* Search for closed handles to reuse. */
2828 VEC_iterate (fileio_fh_t
, fileio_fhandles
,
2829 lowest_closed_fd
, fh
);
2831 if (is_closed_fileio_fh (fh
->fd
))
2834 /* Push a new handle if no closed handles were found. */
2835 if (lowest_closed_fd
== VEC_length (fileio_fh_t
, fileio_fhandles
))
2836 fh
= VEC_safe_push (fileio_fh_t
, fileio_fhandles
, NULL
);
2838 /* Fill in the handle. */
2842 /* Return its index, and start the next lookup at
2844 return lowest_closed_fd
++;
2847 /* Release a target fileio file descriptor. */
2850 release_fileio_fd (int fd
, fileio_fh_t
*fh
)
2853 lowest_closed_fd
= min (lowest_closed_fd
, fd
);
2856 /* Return a pointer to the fileio_fhandle_t corresponding to FD. */
2858 #define fileio_fd_to_fh(fd) \
2859 VEC_index (fileio_fh_t, fileio_fhandles, (fd))
2861 /* Helper for target_fileio_open and
2862 target_fileio_open_warn_if_slow. */
2865 target_fileio_open_1 (struct inferior
*inf
, const char *filename
,
2866 int flags
, int mode
, int warn_if_slow
,
2869 struct target_ops
*t
;
2871 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
2873 if (t
->to_fileio_open
!= NULL
)
2875 int fd
= t
->to_fileio_open (t
, inf
, filename
, flags
, mode
,
2876 warn_if_slow
, target_errno
);
2881 fd
= acquire_fileio_fd (t
, fd
);
2884 fprintf_unfiltered (gdb_stdlog
,
2885 "target_fileio_open (%d,%s,0x%x,0%o,%d)"
2887 inf
== NULL
? 0 : inf
->num
,
2888 filename
, flags
, mode
,
2890 fd
!= -1 ? 0 : *target_errno
);
2895 *target_errno
= FILEIO_ENOSYS
;
2902 target_fileio_open (struct inferior
*inf
, const char *filename
,
2903 int flags
, int mode
, int *target_errno
)
2905 return target_fileio_open_1 (inf
, filename
, flags
, mode
, 0,
2912 target_fileio_open_warn_if_slow (struct inferior
*inf
,
2913 const char *filename
,
2914 int flags
, int mode
, int *target_errno
)
2916 return target_fileio_open_1 (inf
, filename
, flags
, mode
, 1,
2923 target_fileio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
2924 ULONGEST offset
, int *target_errno
)
2926 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
2929 if (is_closed_fileio_fh (fh
->fd
))
2930 *target_errno
= EBADF
;
2932 ret
= fh
->t
->to_fileio_pwrite (fh
->t
, fh
->fd
, write_buf
,
2933 len
, offset
, target_errno
);
2936 fprintf_unfiltered (gdb_stdlog
,
2937 "target_fileio_pwrite (%d,...,%d,%s) "
2939 fd
, len
, pulongest (offset
),
2940 ret
, ret
!= -1 ? 0 : *target_errno
);
2947 target_fileio_pread (int fd
, gdb_byte
*read_buf
, int len
,
2948 ULONGEST offset
, int *target_errno
)
2950 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
2953 if (is_closed_fileio_fh (fh
->fd
))
2954 *target_errno
= EBADF
;
2956 ret
= fh
->t
->to_fileio_pread (fh
->t
, fh
->fd
, read_buf
,
2957 len
, offset
, target_errno
);
2960 fprintf_unfiltered (gdb_stdlog
,
2961 "target_fileio_pread (%d,...,%d,%s) "
2963 fd
, len
, pulongest (offset
),
2964 ret
, ret
!= -1 ? 0 : *target_errno
);
2971 target_fileio_fstat (int fd
, struct stat
*sb
, int *target_errno
)
2973 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
2976 if (is_closed_fileio_fh (fh
->fd
))
2977 *target_errno
= EBADF
;
2979 ret
= fh
->t
->to_fileio_fstat (fh
->t
, fh
->fd
, sb
, target_errno
);
2982 fprintf_unfiltered (gdb_stdlog
,
2983 "target_fileio_fstat (%d) = %d (%d)\n",
2984 fd
, ret
, ret
!= -1 ? 0 : *target_errno
);
2991 target_fileio_close (int fd
, int *target_errno
)
2993 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
2996 if (is_closed_fileio_fh (fh
->fd
))
2997 *target_errno
= EBADF
;
3000 ret
= fh
->t
->to_fileio_close (fh
->t
, fh
->fd
, target_errno
);
3001 release_fileio_fd (fd
, fh
);
3005 fprintf_unfiltered (gdb_stdlog
,
3006 "target_fileio_close (%d) = %d (%d)\n",
3007 fd
, ret
, ret
!= -1 ? 0 : *target_errno
);
3014 target_fileio_unlink (struct inferior
*inf
, const char *filename
,
3017 struct target_ops
*t
;
3019 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
3021 if (t
->to_fileio_unlink
!= NULL
)
3023 int ret
= t
->to_fileio_unlink (t
, inf
, filename
,
3027 fprintf_unfiltered (gdb_stdlog
,
3028 "target_fileio_unlink (%d,%s)"
3030 inf
== NULL
? 0 : inf
->num
, filename
,
3031 ret
, ret
!= -1 ? 0 : *target_errno
);
3036 *target_errno
= FILEIO_ENOSYS
;
3043 target_fileio_readlink (struct inferior
*inf
, const char *filename
,
3046 struct target_ops
*t
;
3048 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
3050 if (t
->to_fileio_readlink
!= NULL
)
3052 char *ret
= t
->to_fileio_readlink (t
, inf
, filename
,
3056 fprintf_unfiltered (gdb_stdlog
,
3057 "target_fileio_readlink (%d,%s)"
3059 inf
== NULL
? 0 : inf
->num
,
3060 filename
, ret
? ret
: "(nil)",
3061 ret
? 0 : *target_errno
);
3066 *target_errno
= FILEIO_ENOSYS
;
3071 target_fileio_close_cleanup (void *opaque
)
3073 int fd
= *(int *) opaque
;
3076 target_fileio_close (fd
, &target_errno
);
3079 /* Read target file FILENAME, in the filesystem as seen by INF. If
3080 INF is NULL, use the filesystem seen by the debugger (GDB or, for
3081 remote targets, the remote stub). Store the result in *BUF_P and
3082 return the size of the transferred data. PADDING additional bytes
3083 are available in *BUF_P. This is a helper function for
3084 target_fileio_read_alloc; see the declaration of that function for
3085 more information. */
3088 target_fileio_read_alloc_1 (struct inferior
*inf
, const char *filename
,
3089 gdb_byte
**buf_p
, int padding
)
3091 struct cleanup
*close_cleanup
;
3092 size_t buf_alloc
, buf_pos
;
3098 fd
= target_fileio_open (inf
, filename
, FILEIO_O_RDONLY
, 0700,
3103 close_cleanup
= make_cleanup (target_fileio_close_cleanup
, &fd
);
3105 /* Start by reading up to 4K at a time. The target will throttle
3106 this number down if necessary. */
3108 buf
= (gdb_byte
*) xmalloc (buf_alloc
);
3112 n
= target_fileio_pread (fd
, &buf
[buf_pos
],
3113 buf_alloc
- buf_pos
- padding
, buf_pos
,
3117 /* An error occurred. */
3118 do_cleanups (close_cleanup
);
3124 /* Read all there was. */
3125 do_cleanups (close_cleanup
);
3135 /* If the buffer is filling up, expand it. */
3136 if (buf_alloc
< buf_pos
* 2)
3139 buf
= (gdb_byte
*) xrealloc (buf
, buf_alloc
);
3149 target_fileio_read_alloc (struct inferior
*inf
, const char *filename
,
3152 return target_fileio_read_alloc_1 (inf
, filename
, buf_p
, 0);
3158 target_fileio_read_stralloc (struct inferior
*inf
, const char *filename
)
3162 LONGEST i
, transferred
;
3164 transferred
= target_fileio_read_alloc_1 (inf
, filename
, &buffer
, 1);
3165 bufstr
= (char *) buffer
;
3167 if (transferred
< 0)
3170 if (transferred
== 0)
3171 return xstrdup ("");
3173 bufstr
[transferred
] = 0;
3175 /* Check for embedded NUL bytes; but allow trailing NULs. */
3176 for (i
= strlen (bufstr
); i
< transferred
; i
++)
3179 warning (_("target file %s "
3180 "contained unexpected null characters"),
3190 default_region_ok_for_hw_watchpoint (struct target_ops
*self
,
3191 CORE_ADDR addr
, int len
)
3193 return (len
<= gdbarch_ptr_bit (target_gdbarch ()) / TARGET_CHAR_BIT
);
3197 default_watchpoint_addr_within_range (struct target_ops
*target
,
3199 CORE_ADDR start
, int length
)
3201 return addr
>= start
&& addr
< start
+ length
;
3204 static struct gdbarch
*
3205 default_thread_architecture (struct target_ops
*ops
, ptid_t ptid
)
3207 return target_gdbarch ();
3211 return_zero (struct target_ops
*ignore
)
3217 return_zero_has_execution (struct target_ops
*ignore
, ptid_t ignore2
)
3223 * Find the next target down the stack from the specified target.
3227 find_target_beneath (struct target_ops
*t
)
3235 find_target_at (enum strata stratum
)
3237 struct target_ops
*t
;
3239 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3240 if (t
->to_stratum
== stratum
)
3251 target_announce_detach (int from_tty
)
3259 exec_file
= get_exec_file (0);
3260 if (exec_file
== NULL
)
3263 pid
= ptid_get_pid (inferior_ptid
);
3264 printf_unfiltered (_("Detaching from program: %s, %s\n"), exec_file
,
3265 target_pid_to_str (pid_to_ptid (pid
)));
3266 gdb_flush (gdb_stdout
);
3269 /* The inferior process has died. Long live the inferior! */
3272 generic_mourn_inferior (void)
3276 ptid
= inferior_ptid
;
3277 inferior_ptid
= null_ptid
;
3279 /* Mark breakpoints uninserted in case something tries to delete a
3280 breakpoint while we delete the inferior's threads (which would
3281 fail, since the inferior is long gone). */
3282 mark_breakpoints_out ();
3284 if (!ptid_equal (ptid
, null_ptid
))
3286 int pid
= ptid_get_pid (ptid
);
3287 exit_inferior (pid
);
3290 /* Note this wipes step-resume breakpoints, so needs to be done
3291 after exit_inferior, which ends up referencing the step-resume
3292 breakpoints through clear_thread_inferior_resources. */
3293 breakpoint_init_inferior (inf_exited
);
3295 registers_changed ();
3297 reopen_exec_file ();
3298 reinit_frame_cache ();
3300 if (deprecated_detach_hook
)
3301 deprecated_detach_hook ();
3304 /* Convert a normal process ID to a string. Returns the string in a
3308 normal_pid_to_str (ptid_t ptid
)
3310 static char buf
[32];
3312 xsnprintf (buf
, sizeof buf
, "process %d", ptid_get_pid (ptid
));
3317 default_pid_to_str (struct target_ops
*ops
, ptid_t ptid
)
3319 return normal_pid_to_str (ptid
);
3322 /* Error-catcher for target_find_memory_regions. */
3324 dummy_find_memory_regions (struct target_ops
*self
,
3325 find_memory_region_ftype ignore1
, void *ignore2
)
3327 error (_("Command not implemented for this target."));
3331 /* Error-catcher for target_make_corefile_notes. */
3333 dummy_make_corefile_notes (struct target_ops
*self
,
3334 bfd
*ignore1
, int *ignore2
)
3336 error (_("Command not implemented for this target."));
3340 /* Set up the handful of non-empty slots needed by the dummy target
3344 init_dummy_target (void)
3346 dummy_target
.to_shortname
= "None";
3347 dummy_target
.to_longname
= "None";
3348 dummy_target
.to_doc
= "";
3349 dummy_target
.to_supports_disable_randomization
3350 = find_default_supports_disable_randomization
;
3351 dummy_target
.to_stratum
= dummy_stratum
;
3352 dummy_target
.to_has_all_memory
= return_zero
;
3353 dummy_target
.to_has_memory
= return_zero
;
3354 dummy_target
.to_has_stack
= return_zero
;
3355 dummy_target
.to_has_registers
= return_zero
;
3356 dummy_target
.to_has_execution
= return_zero_has_execution
;
3357 dummy_target
.to_magic
= OPS_MAGIC
;
3359 install_dummy_methods (&dummy_target
);
3364 target_close (struct target_ops
*targ
)
3366 gdb_assert (!target_is_pushed (targ
));
3368 if (targ
->to_xclose
!= NULL
)
3369 targ
->to_xclose (targ
);
3370 else if (targ
->to_close
!= NULL
)
3371 targ
->to_close (targ
);
3374 fprintf_unfiltered (gdb_stdlog
, "target_close ()\n");
3378 target_thread_alive (ptid_t ptid
)
3380 return current_target
.to_thread_alive (¤t_target
, ptid
);
3384 target_update_thread_list (void)
3386 current_target
.to_update_thread_list (¤t_target
);
3390 target_stop (ptid_t ptid
)
3394 warning (_("May not interrupt or stop the target, ignoring attempt"));
3398 (*current_target
.to_stop
) (¤t_target
, ptid
);
3402 target_interrupt (ptid_t ptid
)
3406 warning (_("May not interrupt or stop the target, ignoring attempt"));
3410 (*current_target
.to_interrupt
) (¤t_target
, ptid
);
3416 target_pass_ctrlc (void)
3418 (*current_target
.to_pass_ctrlc
) (¤t_target
);
3424 default_target_pass_ctrlc (struct target_ops
*ops
)
3426 target_interrupt (inferior_ptid
);
3429 /* See target/target.h. */
3432 target_stop_and_wait (ptid_t ptid
)
3434 struct target_waitstatus status
;
3435 int was_non_stop
= non_stop
;
3440 memset (&status
, 0, sizeof (status
));
3441 target_wait (ptid
, &status
, 0);
3443 non_stop
= was_non_stop
;
3446 /* See target/target.h. */
3449 target_continue_no_signal (ptid_t ptid
)
3451 target_resume (ptid
, 0, GDB_SIGNAL_0
);
3454 /* See target/target.h. */
3457 target_continue (ptid_t ptid
, enum gdb_signal signal
)
3459 target_resume (ptid
, 0, signal
);
3462 /* Concatenate ELEM to LIST, a comma separate list, and return the
3463 result. The LIST incoming argument is released. */
3466 str_comma_list_concat_elem (char *list
, const char *elem
)
3469 return xstrdup (elem
);
3471 return reconcat (list
, list
, ", ", elem
, (char *) NULL
);
3474 /* Helper for target_options_to_string. If OPT is present in
3475 TARGET_OPTIONS, append the OPT_STR (string version of OPT) in RET.
3476 Returns the new resulting string. OPT is removed from
3480 do_option (int *target_options
, char *ret
,
3481 int opt
, char *opt_str
)
3483 if ((*target_options
& opt
) != 0)
3485 ret
= str_comma_list_concat_elem (ret
, opt_str
);
3486 *target_options
&= ~opt
;
3493 target_options_to_string (int target_options
)
3497 #define DO_TARG_OPTION(OPT) \
3498 ret = do_option (&target_options, ret, OPT, #OPT)
3500 DO_TARG_OPTION (TARGET_WNOHANG
);
3502 if (target_options
!= 0)
3503 ret
= str_comma_list_concat_elem (ret
, "unknown???");
3511 debug_print_register (const char * func
,
3512 struct regcache
*regcache
, int regno
)
3514 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
3516 fprintf_unfiltered (gdb_stdlog
, "%s ", func
);
3517 if (regno
>= 0 && regno
< gdbarch_num_regs (gdbarch
)
3518 && gdbarch_register_name (gdbarch
, regno
) != NULL
3519 && gdbarch_register_name (gdbarch
, regno
)[0] != '\0')
3520 fprintf_unfiltered (gdb_stdlog
, "(%s)",
3521 gdbarch_register_name (gdbarch
, regno
));
3523 fprintf_unfiltered (gdb_stdlog
, "(%d)", regno
);
3524 if (regno
>= 0 && regno
< gdbarch_num_regs (gdbarch
))
3526 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
3527 int i
, size
= register_size (gdbarch
, regno
);
3528 gdb_byte buf
[MAX_REGISTER_SIZE
];
3530 regcache_raw_collect (regcache
, regno
, buf
);
3531 fprintf_unfiltered (gdb_stdlog
, " = ");
3532 for (i
= 0; i
< size
; i
++)
3534 fprintf_unfiltered (gdb_stdlog
, "%02x", buf
[i
]);
3536 if (size
<= sizeof (LONGEST
))
3538 ULONGEST val
= extract_unsigned_integer (buf
, size
, byte_order
);
3540 fprintf_unfiltered (gdb_stdlog
, " %s %s",
3541 core_addr_to_string_nz (val
), plongest (val
));
3544 fprintf_unfiltered (gdb_stdlog
, "\n");
3548 target_fetch_registers (struct regcache
*regcache
, int regno
)
3550 current_target
.to_fetch_registers (¤t_target
, regcache
, regno
);
3552 debug_print_register ("target_fetch_registers", regcache
, regno
);
3556 target_store_registers (struct regcache
*regcache
, int regno
)
3558 if (!may_write_registers
)
3559 error (_("Writing to registers is not allowed (regno %d)"), regno
);
3561 current_target
.to_store_registers (¤t_target
, regcache
, regno
);
3564 debug_print_register ("target_store_registers", regcache
, regno
);
3569 target_core_of_thread (ptid_t ptid
)
3571 return current_target
.to_core_of_thread (¤t_target
, ptid
);
3575 simple_verify_memory (struct target_ops
*ops
,
3576 const gdb_byte
*data
, CORE_ADDR lma
, ULONGEST size
)
3578 LONGEST total_xfered
= 0;
3580 while (total_xfered
< size
)
3582 ULONGEST xfered_len
;
3583 enum target_xfer_status status
;
3585 ULONGEST howmuch
= min (sizeof (buf
), size
- total_xfered
);
3587 status
= target_xfer_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
3588 buf
, NULL
, lma
+ total_xfered
, howmuch
,
3590 if (status
== TARGET_XFER_OK
3591 && memcmp (data
+ total_xfered
, buf
, xfered_len
) == 0)
3593 total_xfered
+= xfered_len
;
3602 /* Default implementation of memory verification. */
3605 default_verify_memory (struct target_ops
*self
,
3606 const gdb_byte
*data
, CORE_ADDR memaddr
, ULONGEST size
)
3608 /* Start over from the top of the target stack. */
3609 return simple_verify_memory (current_target
.beneath
,
3610 data
, memaddr
, size
);
3614 target_verify_memory (const gdb_byte
*data
, CORE_ADDR memaddr
, ULONGEST size
)
3616 return current_target
.to_verify_memory (¤t_target
,
3617 data
, memaddr
, size
);
3620 /* The documentation for this function is in its prototype declaration in
3624 target_insert_mask_watchpoint (CORE_ADDR addr
, CORE_ADDR mask
,
3625 enum target_hw_bp_type rw
)
3627 return current_target
.to_insert_mask_watchpoint (¤t_target
,
3631 /* The documentation for this function is in its prototype declaration in
3635 target_remove_mask_watchpoint (CORE_ADDR addr
, CORE_ADDR mask
,
3636 enum target_hw_bp_type rw
)
3638 return current_target
.to_remove_mask_watchpoint (¤t_target
,
3642 /* The documentation for this function is in its prototype declaration
3646 target_masked_watch_num_registers (CORE_ADDR addr
, CORE_ADDR mask
)
3648 return current_target
.to_masked_watch_num_registers (¤t_target
,
3652 /* The documentation for this function is in its prototype declaration
3656 target_ranged_break_num_registers (void)
3658 return current_target
.to_ranged_break_num_registers (¤t_target
);
3664 target_supports_btrace (enum btrace_format format
)
3666 return current_target
.to_supports_btrace (¤t_target
, format
);
3671 struct btrace_target_info
*
3672 target_enable_btrace (ptid_t ptid
, const struct btrace_config
*conf
)
3674 return current_target
.to_enable_btrace (¤t_target
, ptid
, conf
);
3680 target_disable_btrace (struct btrace_target_info
*btinfo
)
3682 current_target
.to_disable_btrace (¤t_target
, btinfo
);
3688 target_teardown_btrace (struct btrace_target_info
*btinfo
)
3690 current_target
.to_teardown_btrace (¤t_target
, btinfo
);
3696 target_read_btrace (struct btrace_data
*btrace
,
3697 struct btrace_target_info
*btinfo
,
3698 enum btrace_read_type type
)
3700 return current_target
.to_read_btrace (¤t_target
, btrace
, btinfo
, type
);
3705 const struct btrace_config
*
3706 target_btrace_conf (const struct btrace_target_info
*btinfo
)
3708 return current_target
.to_btrace_conf (¤t_target
, btinfo
);
3714 target_stop_recording (void)
3716 current_target
.to_stop_recording (¤t_target
);
3722 target_save_record (const char *filename
)
3724 current_target
.to_save_record (¤t_target
, filename
);
3730 target_supports_delete_record (void)
3732 struct target_ops
*t
;
3734 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3735 if (t
->to_delete_record
!= delegate_delete_record
3736 && t
->to_delete_record
!= tdefault_delete_record
)
3745 target_delete_record (void)
3747 current_target
.to_delete_record (¤t_target
);
3753 target_record_is_replaying (ptid_t ptid
)
3755 return current_target
.to_record_is_replaying (¤t_target
, ptid
);
3761 target_record_will_replay (ptid_t ptid
, int dir
)
3763 return current_target
.to_record_will_replay (¤t_target
, ptid
, dir
);
3769 target_record_stop_replaying (void)
3771 current_target
.to_record_stop_replaying (¤t_target
);
3777 target_goto_record_begin (void)
3779 current_target
.to_goto_record_begin (¤t_target
);
3785 target_goto_record_end (void)
3787 current_target
.to_goto_record_end (¤t_target
);
3793 target_goto_record (ULONGEST insn
)
3795 current_target
.to_goto_record (¤t_target
, insn
);
3801 target_insn_history (int size
, int flags
)
3803 current_target
.to_insn_history (¤t_target
, size
, flags
);
3809 target_insn_history_from (ULONGEST from
, int size
, int flags
)
3811 current_target
.to_insn_history_from (¤t_target
, from
, size
, flags
);
3817 target_insn_history_range (ULONGEST begin
, ULONGEST end
, int flags
)
3819 current_target
.to_insn_history_range (¤t_target
, begin
, end
, flags
);
3825 target_call_history (int size
, int flags
)
3827 current_target
.to_call_history (¤t_target
, size
, flags
);
3833 target_call_history_from (ULONGEST begin
, int size
, int flags
)
3835 current_target
.to_call_history_from (¤t_target
, begin
, size
, flags
);
3841 target_call_history_range (ULONGEST begin
, ULONGEST end
, int flags
)
3843 current_target
.to_call_history_range (¤t_target
, begin
, end
, flags
);
3848 const struct frame_unwind
*
3849 target_get_unwinder (void)
3851 return current_target
.to_get_unwinder (¤t_target
);
3856 const struct frame_unwind
*
3857 target_get_tailcall_unwinder (void)
3859 return current_target
.to_get_tailcall_unwinder (¤t_target
);
3865 target_prepare_to_generate_core (void)
3867 current_target
.to_prepare_to_generate_core (¤t_target
);
3873 target_done_generating_core (void)
3875 current_target
.to_done_generating_core (¤t_target
);
3879 setup_target_debug (void)
3881 memcpy (&debug_target
, ¤t_target
, sizeof debug_target
);
3883 init_debug_target (¤t_target
);
3887 static char targ_desc
[] =
3888 "Names of targets and files being debugged.\nShows the entire \
3889 stack of targets currently in use (including the exec-file,\n\
3890 core-file, and process, if any), as well as the symbol file name.";
3893 default_rcmd (struct target_ops
*self
, const char *command
,
3894 struct ui_file
*output
)
3896 error (_("\"monitor\" command not supported by this target."));
3900 do_monitor_command (char *cmd
,
3903 target_rcmd (cmd
, gdb_stdtarg
);
3906 /* Print the name of each layers of our target stack. */
3909 maintenance_print_target_stack (char *cmd
, int from_tty
)
3911 struct target_ops
*t
;
3913 printf_filtered (_("The current target stack is:\n"));
3915 for (t
= target_stack
; t
!= NULL
; t
= t
->beneath
)
3917 printf_filtered (" - %s (%s)\n", t
->to_shortname
, t
->to_longname
);
3924 target_async (int enable
)
3926 infrun_async (enable
);
3927 current_target
.to_async (¤t_target
, enable
);
3933 target_thread_events (int enable
)
3935 current_target
.to_thread_events (¤t_target
, enable
);
3938 /* Controls if targets can report that they can/are async. This is
3939 just for maintainers to use when debugging gdb. */
3940 int target_async_permitted
= 1;
3942 /* The set command writes to this variable. If the inferior is
3943 executing, target_async_permitted is *not* updated. */
3944 static int target_async_permitted_1
= 1;
3947 maint_set_target_async_command (char *args
, int from_tty
,
3948 struct cmd_list_element
*c
)
3950 if (have_live_inferiors ())
3952 target_async_permitted_1
= target_async_permitted
;
3953 error (_("Cannot change this setting while the inferior is running."));
3956 target_async_permitted
= target_async_permitted_1
;
3960 maint_show_target_async_command (struct ui_file
*file
, int from_tty
,
3961 struct cmd_list_element
*c
,
3964 fprintf_filtered (file
,
3965 _("Controlling the inferior in "
3966 "asynchronous mode is %s.\n"), value
);
3969 /* Return true if the target operates in non-stop mode even with "set
3973 target_always_non_stop_p (void)
3975 return current_target
.to_always_non_stop_p (¤t_target
);
3981 target_is_non_stop_p (void)
3984 || target_non_stop_enabled
== AUTO_BOOLEAN_TRUE
3985 || (target_non_stop_enabled
== AUTO_BOOLEAN_AUTO
3986 && target_always_non_stop_p ()));
3989 /* Controls if targets can report that they always run in non-stop
3990 mode. This is just for maintainers to use when debugging gdb. */
3991 enum auto_boolean target_non_stop_enabled
= AUTO_BOOLEAN_AUTO
;
3993 /* The set command writes to this variable. If the inferior is
3994 executing, target_non_stop_enabled is *not* updated. */
3995 static enum auto_boolean target_non_stop_enabled_1
= AUTO_BOOLEAN_AUTO
;
3997 /* Implementation of "maint set target-non-stop". */
4000 maint_set_target_non_stop_command (char *args
, int from_tty
,
4001 struct cmd_list_element
*c
)
4003 if (have_live_inferiors ())
4005 target_non_stop_enabled_1
= target_non_stop_enabled
;
4006 error (_("Cannot change this setting while the inferior is running."));
4009 target_non_stop_enabled
= target_non_stop_enabled_1
;
4012 /* Implementation of "maint show target-non-stop". */
4015 maint_show_target_non_stop_command (struct ui_file
*file
, int from_tty
,
4016 struct cmd_list_element
*c
,
4019 if (target_non_stop_enabled
== AUTO_BOOLEAN_AUTO
)
4020 fprintf_filtered (file
,
4021 _("Whether the target is always in non-stop mode "
4022 "is %s (currently %s).\n"), value
,
4023 target_always_non_stop_p () ? "on" : "off");
4025 fprintf_filtered (file
,
4026 _("Whether the target is always in non-stop mode "
4027 "is %s.\n"), value
);
4030 /* Temporary copies of permission settings. */
4032 static int may_write_registers_1
= 1;
4033 static int may_write_memory_1
= 1;
4034 static int may_insert_breakpoints_1
= 1;
4035 static int may_insert_tracepoints_1
= 1;
4036 static int may_insert_fast_tracepoints_1
= 1;
4037 static int may_stop_1
= 1;
4039 /* Make the user-set values match the real values again. */
4042 update_target_permissions (void)
4044 may_write_registers_1
= may_write_registers
;
4045 may_write_memory_1
= may_write_memory
;
4046 may_insert_breakpoints_1
= may_insert_breakpoints
;
4047 may_insert_tracepoints_1
= may_insert_tracepoints
;
4048 may_insert_fast_tracepoints_1
= may_insert_fast_tracepoints
;
4049 may_stop_1
= may_stop
;
4052 /* The one function handles (most of) the permission flags in the same
4056 set_target_permissions (char *args
, int from_tty
,
4057 struct cmd_list_element
*c
)
4059 if (target_has_execution
)
4061 update_target_permissions ();
4062 error (_("Cannot change this setting while the inferior is running."));
4065 /* Make the real values match the user-changed values. */
4066 may_write_registers
= may_write_registers_1
;
4067 may_insert_breakpoints
= may_insert_breakpoints_1
;
4068 may_insert_tracepoints
= may_insert_tracepoints_1
;
4069 may_insert_fast_tracepoints
= may_insert_fast_tracepoints_1
;
4070 may_stop
= may_stop_1
;
4071 update_observer_mode ();
4074 /* Set memory write permission independently of observer mode. */
4077 set_write_memory_permission (char *args
, int from_tty
,
4078 struct cmd_list_element
*c
)
4080 /* Make the real values match the user-changed values. */
4081 may_write_memory
= may_write_memory_1
;
4082 update_observer_mode ();
4087 initialize_targets (void)
4089 init_dummy_target ();
4090 push_target (&dummy_target
);
4092 add_info ("target", target_info
, targ_desc
);
4093 add_info ("files", target_info
, targ_desc
);
4095 add_setshow_zuinteger_cmd ("target", class_maintenance
, &targetdebug
, _("\
4096 Set target debugging."), _("\
4097 Show target debugging."), _("\
4098 When non-zero, target debugging is enabled. Higher numbers are more\n\
4102 &setdebuglist
, &showdebuglist
);
4104 add_setshow_boolean_cmd ("trust-readonly-sections", class_support
,
4105 &trust_readonly
, _("\
4106 Set mode for reading from readonly sections."), _("\
4107 Show mode for reading from readonly sections."), _("\
4108 When this mode is on, memory reads from readonly sections (such as .text)\n\
4109 will be read from the object file instead of from the target. This will\n\
4110 result in significant performance improvement for remote targets."),
4112 show_trust_readonly
,
4113 &setlist
, &showlist
);
4115 add_com ("monitor", class_obscure
, do_monitor_command
,
4116 _("Send a command to the remote monitor (remote targets only)."));
4118 add_cmd ("target-stack", class_maintenance
, maintenance_print_target_stack
,
4119 _("Print the name of each layer of the internal target stack."),
4120 &maintenanceprintlist
);
4122 add_setshow_boolean_cmd ("target-async", no_class
,
4123 &target_async_permitted_1
, _("\
4124 Set whether gdb controls the inferior in asynchronous mode."), _("\
4125 Show whether gdb controls the inferior in asynchronous mode."), _("\
4126 Tells gdb whether to control the inferior in asynchronous mode."),
4127 maint_set_target_async_command
,
4128 maint_show_target_async_command
,
4129 &maintenance_set_cmdlist
,
4130 &maintenance_show_cmdlist
);
4132 add_setshow_auto_boolean_cmd ("target-non-stop", no_class
,
4133 &target_non_stop_enabled_1
, _("\
4134 Set whether gdb always controls the inferior in non-stop mode."), _("\
4135 Show whether gdb always controls the inferior in non-stop mode."), _("\
4136 Tells gdb whether to control the inferior in non-stop mode."),
4137 maint_set_target_non_stop_command
,
4138 maint_show_target_non_stop_command
,
4139 &maintenance_set_cmdlist
,
4140 &maintenance_show_cmdlist
);
4142 add_setshow_boolean_cmd ("may-write-registers", class_support
,
4143 &may_write_registers_1
, _("\
4144 Set permission to write into registers."), _("\
4145 Show permission to write into registers."), _("\
4146 When this permission is on, GDB may write into the target's registers.\n\
4147 Otherwise, any sort of write attempt will result in an error."),
4148 set_target_permissions
, NULL
,
4149 &setlist
, &showlist
);
4151 add_setshow_boolean_cmd ("may-write-memory", class_support
,
4152 &may_write_memory_1
, _("\
4153 Set permission to write into target memory."), _("\
4154 Show permission to write into target memory."), _("\
4155 When this permission is on, GDB may write into the target's memory.\n\
4156 Otherwise, any sort of write attempt will result in an error."),
4157 set_write_memory_permission
, NULL
,
4158 &setlist
, &showlist
);
4160 add_setshow_boolean_cmd ("may-insert-breakpoints", class_support
,
4161 &may_insert_breakpoints_1
, _("\
4162 Set permission to insert breakpoints in the target."), _("\
4163 Show permission to insert breakpoints in the target."), _("\
4164 When this permission is on, GDB may insert breakpoints in the program.\n\
4165 Otherwise, any sort of insertion attempt will result in an error."),
4166 set_target_permissions
, NULL
,
4167 &setlist
, &showlist
);
4169 add_setshow_boolean_cmd ("may-insert-tracepoints", class_support
,
4170 &may_insert_tracepoints_1
, _("\
4171 Set permission to insert tracepoints in the target."), _("\
4172 Show permission to insert tracepoints in the target."), _("\
4173 When this permission is on, GDB may insert tracepoints in the program.\n\
4174 Otherwise, any sort of insertion attempt will result in an error."),
4175 set_target_permissions
, NULL
,
4176 &setlist
, &showlist
);
4178 add_setshow_boolean_cmd ("may-insert-fast-tracepoints", class_support
,
4179 &may_insert_fast_tracepoints_1
, _("\
4180 Set permission to insert fast tracepoints in the target."), _("\
4181 Show permission to insert fast tracepoints in the target."), _("\
4182 When this permission is on, GDB may insert fast tracepoints.\n\
4183 Otherwise, any sort of insertion attempt will result in an error."),
4184 set_target_permissions
, NULL
,
4185 &setlist
, &showlist
);
4187 add_setshow_boolean_cmd ("may-interrupt", class_support
,
4189 Set permission to interrupt or signal the target."), _("\
4190 Show permission to interrupt or signal the target."), _("\
4191 When this permission is on, GDB may interrupt/stop the target's execution.\n\
4192 Otherwise, any attempt to interrupt or stop will be ignored."),
4193 set_target_permissions
, NULL
,
4194 &setlist
, &showlist
);
4196 add_setshow_boolean_cmd ("auto-connect-native-target", class_support
,
4197 &auto_connect_native_target
, _("\
4198 Set whether GDB may automatically connect to the native target."), _("\
4199 Show whether GDB may automatically connect to the native target."), _("\
4200 When on, and GDB is not connected to a target yet, GDB\n\
4201 attempts \"run\" and other commands with the native target."),
4202 NULL
, show_auto_connect_native_target
,
4203 &setlist
, &showlist
);