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"
50 static void target_info (char *, int);
52 static void generic_tls_error (void) ATTRIBUTE_NORETURN
;
54 static void default_terminal_info (struct target_ops
*, const char *, int);
56 static int default_watchpoint_addr_within_range (struct target_ops
*,
57 CORE_ADDR
, CORE_ADDR
, int);
59 static int default_region_ok_for_hw_watchpoint (struct target_ops
*,
62 static void default_rcmd (struct target_ops
*, const char *, struct ui_file
*);
64 static ptid_t
default_get_ada_task_ptid (struct target_ops
*self
,
67 static int default_follow_fork (struct target_ops
*self
, int follow_child
,
70 static void default_mourn_inferior (struct target_ops
*self
);
72 static int default_search_memory (struct target_ops
*ops
,
74 ULONGEST search_space_len
,
75 const gdb_byte
*pattern
,
77 CORE_ADDR
*found_addrp
);
79 static int default_verify_memory (struct target_ops
*self
,
81 CORE_ADDR memaddr
, ULONGEST size
);
83 static struct address_space
*default_thread_address_space
84 (struct target_ops
*self
, ptid_t ptid
);
86 static void tcomplain (void) ATTRIBUTE_NORETURN
;
88 static int return_zero (struct target_ops
*);
90 static int return_zero_has_execution (struct target_ops
*, ptid_t
);
92 static void target_command (char *, int);
94 static struct target_ops
*find_default_run_target (char *);
96 static struct gdbarch
*default_thread_architecture (struct target_ops
*ops
,
99 static int dummy_find_memory_regions (struct target_ops
*self
,
100 find_memory_region_ftype ignore1
,
103 static char *dummy_make_corefile_notes (struct target_ops
*self
,
104 bfd
*ignore1
, int *ignore2
);
106 static char *default_pid_to_str (struct target_ops
*ops
, ptid_t ptid
);
108 static enum exec_direction_kind default_execution_direction
109 (struct target_ops
*self
);
111 static struct target_ops debug_target
;
113 #include "target-delegates.c"
115 static void init_dummy_target (void);
117 static void update_current_target (void);
119 /* Vector of existing target structures. */
120 typedef struct target_ops
*target_ops_p
;
121 DEF_VEC_P (target_ops_p
);
122 static VEC (target_ops_p
) *target_structs
;
124 /* The initial current target, so that there is always a semi-valid
127 static struct target_ops dummy_target
;
129 /* Top of target stack. */
131 static struct target_ops
*target_stack
;
133 /* The target structure we are currently using to talk to a process
134 or file or whatever "inferior" we have. */
136 struct target_ops current_target
;
138 /* Command list for target. */
140 static struct cmd_list_element
*targetlist
= NULL
;
142 /* Nonzero if we should trust readonly sections from the
143 executable when reading memory. */
145 static int trust_readonly
= 0;
147 /* Nonzero if we should show true memory content including
148 memory breakpoint inserted by gdb. */
150 static int show_memory_breakpoints
= 0;
152 /* These globals control whether GDB attempts to perform these
153 operations; they are useful for targets that need to prevent
154 inadvertant disruption, such as in non-stop mode. */
156 int may_write_registers
= 1;
158 int may_write_memory
= 1;
160 int may_insert_breakpoints
= 1;
162 int may_insert_tracepoints
= 1;
164 int may_insert_fast_tracepoints
= 1;
168 /* Non-zero if we want to see trace of target level stuff. */
170 static unsigned int targetdebug
= 0;
173 set_targetdebug (char *args
, int from_tty
, struct cmd_list_element
*c
)
175 update_current_target ();
179 show_targetdebug (struct ui_file
*file
, int from_tty
,
180 struct cmd_list_element
*c
, const char *value
)
182 fprintf_filtered (file
, _("Target debugging is %s.\n"), value
);
185 static void setup_target_debug (void);
187 /* The user just typed 'target' without the name of a target. */
190 target_command (char *arg
, int from_tty
)
192 fputs_filtered ("Argument required (target name). Try `help target'\n",
196 /* Default target_has_* methods for process_stratum targets. */
199 default_child_has_all_memory (struct target_ops
*ops
)
201 /* If no inferior selected, then we can't read memory here. */
202 if (ptid_equal (inferior_ptid
, null_ptid
))
209 default_child_has_memory (struct target_ops
*ops
)
211 /* If no inferior selected, then we can't read memory here. */
212 if (ptid_equal (inferior_ptid
, null_ptid
))
219 default_child_has_stack (struct target_ops
*ops
)
221 /* If no inferior selected, there's no stack. */
222 if (ptid_equal (inferior_ptid
, null_ptid
))
229 default_child_has_registers (struct target_ops
*ops
)
231 /* Can't read registers from no inferior. */
232 if (ptid_equal (inferior_ptid
, null_ptid
))
239 default_child_has_execution (struct target_ops
*ops
, ptid_t the_ptid
)
241 /* If there's no thread selected, then we can't make it run through
243 if (ptid_equal (the_ptid
, null_ptid
))
251 target_has_all_memory_1 (void)
253 struct target_ops
*t
;
255 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
256 if (t
->to_has_all_memory (t
))
263 target_has_memory_1 (void)
265 struct target_ops
*t
;
267 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
268 if (t
->to_has_memory (t
))
275 target_has_stack_1 (void)
277 struct target_ops
*t
;
279 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
280 if (t
->to_has_stack (t
))
287 target_has_registers_1 (void)
289 struct target_ops
*t
;
291 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
292 if (t
->to_has_registers (t
))
299 target_has_execution_1 (ptid_t the_ptid
)
301 struct target_ops
*t
;
303 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
304 if (t
->to_has_execution (t
, the_ptid
))
311 target_has_execution_current (void)
313 return target_has_execution_1 (inferior_ptid
);
316 /* Complete initialization of T. This ensures that various fields in
317 T are set, if needed by the target implementation. */
320 complete_target_initialization (struct target_ops
*t
)
322 /* Provide default values for all "must have" methods. */
324 if (t
->to_has_all_memory
== NULL
)
325 t
->to_has_all_memory
= return_zero
;
327 if (t
->to_has_memory
== NULL
)
328 t
->to_has_memory
= return_zero
;
330 if (t
->to_has_stack
== NULL
)
331 t
->to_has_stack
= return_zero
;
333 if (t
->to_has_registers
== NULL
)
334 t
->to_has_registers
= return_zero
;
336 if (t
->to_has_execution
== NULL
)
337 t
->to_has_execution
= return_zero_has_execution
;
339 /* These methods can be called on an unpushed target and so require
340 a default implementation if the target might plausibly be the
341 default run target. */
342 gdb_assert (t
->to_can_run
== NULL
|| (t
->to_can_async_p
!= NULL
343 && t
->to_supports_non_stop
!= NULL
));
345 install_delegators (t
);
348 /* This is used to implement the various target commands. */
351 open_target (char *args
, int from_tty
, struct cmd_list_element
*command
)
353 struct target_ops
*ops
= (struct target_ops
*) get_cmd_context (command
);
356 fprintf_unfiltered (gdb_stdlog
, "-> %s->to_open (...)\n",
359 ops
->to_open (args
, from_tty
);
362 fprintf_unfiltered (gdb_stdlog
, "<- %s->to_open (%s, %d)\n",
363 ops
->to_shortname
, args
, from_tty
);
366 /* Add possible target architecture T to the list and add a new
367 command 'target T->to_shortname'. Set COMPLETER as the command's
368 completer if not NULL. */
371 add_target_with_completer (struct target_ops
*t
,
372 completer_ftype
*completer
)
374 struct cmd_list_element
*c
;
376 complete_target_initialization (t
);
378 VEC_safe_push (target_ops_p
, target_structs
, t
);
380 if (targetlist
== NULL
)
381 add_prefix_cmd ("target", class_run
, target_command
, _("\
382 Connect to a target machine or process.\n\
383 The first argument is the type or protocol of the target machine.\n\
384 Remaining arguments are interpreted by the target protocol. For more\n\
385 information on the arguments for a particular protocol, type\n\
386 `help target ' followed by the protocol name."),
387 &targetlist
, "target ", 0, &cmdlist
);
388 c
= add_cmd (t
->to_shortname
, no_class
, NULL
, t
->to_doc
, &targetlist
);
389 set_cmd_sfunc (c
, open_target
);
390 set_cmd_context (c
, t
);
391 if (completer
!= NULL
)
392 set_cmd_completer (c
, completer
);
395 /* Add a possible target architecture to the list. */
398 add_target (struct target_ops
*t
)
400 add_target_with_completer (t
, NULL
);
406 add_deprecated_target_alias (struct target_ops
*t
, char *alias
)
408 struct cmd_list_element
*c
;
411 /* If we use add_alias_cmd, here, we do not get the deprecated warning,
413 c
= add_cmd (alias
, no_class
, NULL
, t
->to_doc
, &targetlist
);
414 set_cmd_sfunc (c
, open_target
);
415 set_cmd_context (c
, t
);
416 alt
= xstrprintf ("target %s", t
->to_shortname
);
417 deprecate_cmd (c
, alt
);
425 current_target
.to_kill (¤t_target
);
429 target_load (const char *arg
, int from_tty
)
431 target_dcache_invalidate ();
432 (*current_target
.to_load
) (¤t_target
, arg
, from_tty
);
435 /* Possible terminal states. */
439 /* The inferior's terminal settings are in effect. */
440 terminal_is_inferior
= 0,
442 /* Some of our terminal settings are in effect, enough to get
444 terminal_is_ours_for_output
= 1,
446 /* Our terminal settings are in effect, for output and input. */
450 static enum terminal_state terminal_state
= terminal_is_ours
;
455 target_terminal_init (void)
457 (*current_target
.to_terminal_init
) (¤t_target
);
459 terminal_state
= terminal_is_ours
;
465 target_terminal_is_inferior (void)
467 return (terminal_state
== terminal_is_inferior
);
473 target_terminal_is_ours (void)
475 return (terminal_state
== terminal_is_ours
);
481 target_terminal_inferior (void)
483 struct ui
*ui
= current_ui
;
485 /* A background resume (``run&'') should leave GDB in control of the
487 if (ui
->prompt_state
!= PROMPT_BLOCKED
)
490 /* Since we always run the inferior in the main console (unless "set
491 inferior-tty" is in effect), when some UI other than the main one
492 calls target_terminal_inferior/target_terminal_inferior, then we
493 leave the main UI's terminal settings as is. */
497 if (terminal_state
== terminal_is_inferior
)
500 /* If GDB is resuming the inferior in the foreground, install
501 inferior's terminal modes. */
502 (*current_target
.to_terminal_inferior
) (¤t_target
);
503 terminal_state
= terminal_is_inferior
;
505 /* If the user hit C-c before, pretend that it was hit right
507 if (check_quit_flag ())
508 target_pass_ctrlc ();
514 target_terminal_ours (void)
516 struct ui
*ui
= current_ui
;
518 /* See target_terminal_inferior. */
522 if (terminal_state
== terminal_is_ours
)
525 (*current_target
.to_terminal_ours
) (¤t_target
);
526 terminal_state
= terminal_is_ours
;
532 target_terminal_ours_for_output (void)
534 struct ui
*ui
= current_ui
;
536 /* See target_terminal_inferior. */
540 if (terminal_state
!= terminal_is_inferior
)
542 (*current_target
.to_terminal_ours_for_output
) (¤t_target
);
543 terminal_state
= terminal_is_ours_for_output
;
549 target_supports_terminal_ours (void)
551 struct target_ops
*t
;
553 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
555 if (t
->to_terminal_ours
!= delegate_terminal_ours
556 && t
->to_terminal_ours
!= tdefault_terminal_ours
)
563 /* Restore the terminal to its previous state (helper for
564 make_cleanup_restore_target_terminal). */
567 cleanup_restore_target_terminal (void *arg
)
569 enum terminal_state
*previous_state
= (enum terminal_state
*) arg
;
571 switch (*previous_state
)
573 case terminal_is_ours
:
574 target_terminal_ours ();
576 case terminal_is_ours_for_output
:
577 target_terminal_ours_for_output ();
579 case terminal_is_inferior
:
580 target_terminal_inferior ();
588 make_cleanup_restore_target_terminal (void)
590 enum terminal_state
*ts
= XNEW (enum terminal_state
);
592 *ts
= terminal_state
;
594 return make_cleanup_dtor (cleanup_restore_target_terminal
, ts
, xfree
);
600 error (_("You can't do that when your target is `%s'"),
601 current_target
.to_shortname
);
607 error (_("You can't do that without a process to debug."));
611 default_terminal_info (struct target_ops
*self
, const char *args
, int from_tty
)
613 printf_unfiltered (_("No saved terminal information.\n"));
616 /* A default implementation for the to_get_ada_task_ptid target method.
618 This function builds the PTID by using both LWP and TID as part of
619 the PTID lwp and tid elements. The pid used is the pid of the
623 default_get_ada_task_ptid (struct target_ops
*self
, long lwp
, long tid
)
625 return ptid_build (ptid_get_pid (inferior_ptid
), lwp
, tid
);
628 static enum exec_direction_kind
629 default_execution_direction (struct target_ops
*self
)
631 if (!target_can_execute_reverse
)
633 else if (!target_can_async_p ())
636 gdb_assert_not_reached ("\
637 to_execution_direction must be implemented for reverse async");
640 /* Go through the target stack from top to bottom, copying over zero
641 entries in current_target, then filling in still empty entries. In
642 effect, we are doing class inheritance through the pushed target
645 NOTE: cagney/2003-10-17: The problem with this inheritance, as it
646 is currently implemented, is that it discards any knowledge of
647 which target an inherited method originally belonged to.
648 Consequently, new new target methods should instead explicitly and
649 locally search the target stack for the target that can handle the
653 update_current_target (void)
655 struct target_ops
*t
;
657 /* First, reset current's contents. */
658 memset (¤t_target
, 0, sizeof (current_target
));
660 /* Install the delegators. */
661 install_delegators (¤t_target
);
663 current_target
.to_stratum
= target_stack
->to_stratum
;
665 #define INHERIT(FIELD, TARGET) \
666 if (!current_target.FIELD) \
667 current_target.FIELD = (TARGET)->FIELD
669 /* Do not add any new INHERITs here. Instead, use the delegation
670 mechanism provided by make-target-delegates. */
671 for (t
= target_stack
; t
; t
= t
->beneath
)
673 INHERIT (to_shortname
, t
);
674 INHERIT (to_longname
, t
);
675 INHERIT (to_attach_no_wait
, t
);
676 INHERIT (to_have_steppable_watchpoint
, t
);
677 INHERIT (to_have_continuable_watchpoint
, t
);
678 INHERIT (to_has_thread_control
, t
);
682 /* Finally, position the target-stack beneath the squashed
683 "current_target". That way code looking for a non-inherited
684 target method can quickly and simply find it. */
685 current_target
.beneath
= target_stack
;
688 setup_target_debug ();
691 /* Push a new target type into the stack of the existing target accessors,
692 possibly superseding some of the existing accessors.
694 Rather than allow an empty stack, we always have the dummy target at
695 the bottom stratum, so we can call the function vectors without
699 push_target (struct target_ops
*t
)
701 struct target_ops
**cur
;
703 /* Check magic number. If wrong, it probably means someone changed
704 the struct definition, but not all the places that initialize one. */
705 if (t
->to_magic
!= OPS_MAGIC
)
707 fprintf_unfiltered (gdb_stderr
,
708 "Magic number of %s target struct wrong\n",
710 internal_error (__FILE__
, __LINE__
,
711 _("failed internal consistency check"));
714 /* Find the proper stratum to install this target in. */
715 for (cur
= &target_stack
; (*cur
) != NULL
; cur
= &(*cur
)->beneath
)
717 if ((int) (t
->to_stratum
) >= (int) (*cur
)->to_stratum
)
721 /* If there's already targets at this stratum, remove them. */
722 /* FIXME: cagney/2003-10-15: I think this should be popping all
723 targets to CUR, and not just those at this stratum level. */
724 while ((*cur
) != NULL
&& t
->to_stratum
== (*cur
)->to_stratum
)
726 /* There's already something at this stratum level. Close it,
727 and un-hook it from the stack. */
728 struct target_ops
*tmp
= (*cur
);
730 (*cur
) = (*cur
)->beneath
;
735 /* We have removed all targets in our stratum, now add the new one. */
739 update_current_target ();
742 /* Remove a target_ops vector from the stack, wherever it may be.
743 Return how many times it was removed (0 or 1). */
746 unpush_target (struct target_ops
*t
)
748 struct target_ops
**cur
;
749 struct target_ops
*tmp
;
751 if (t
->to_stratum
== dummy_stratum
)
752 internal_error (__FILE__
, __LINE__
,
753 _("Attempt to unpush the dummy target"));
755 /* Look for the specified target. Note that we assume that a target
756 can only occur once in the target stack. */
758 for (cur
= &target_stack
; (*cur
) != NULL
; cur
= &(*cur
)->beneath
)
764 /* If we don't find target_ops, quit. Only open targets should be
769 /* Unchain the target. */
771 (*cur
) = (*cur
)->beneath
;
774 update_current_target ();
776 /* Finally close the target. Note we do this after unchaining, so
777 any target method calls from within the target_close
778 implementation don't end up in T anymore. */
784 /* Unpush TARGET and assert that it worked. */
787 unpush_target_and_assert (struct target_ops
*target
)
789 if (!unpush_target (target
))
791 fprintf_unfiltered (gdb_stderr
,
792 "pop_all_targets couldn't find target %s\n",
793 target
->to_shortname
);
794 internal_error (__FILE__
, __LINE__
,
795 _("failed internal consistency check"));
800 pop_all_targets_above (enum strata above_stratum
)
802 while ((int) (current_target
.to_stratum
) > (int) above_stratum
)
803 unpush_target_and_assert (target_stack
);
809 pop_all_targets_at_and_above (enum strata stratum
)
811 while ((int) (current_target
.to_stratum
) >= (int) stratum
)
812 unpush_target_and_assert (target_stack
);
816 pop_all_targets (void)
818 pop_all_targets_above (dummy_stratum
);
821 /* Return 1 if T is now pushed in the target stack. Return 0 otherwise. */
824 target_is_pushed (struct target_ops
*t
)
826 struct target_ops
*cur
;
828 /* Check magic number. If wrong, it probably means someone changed
829 the struct definition, but not all the places that initialize one. */
830 if (t
->to_magic
!= OPS_MAGIC
)
832 fprintf_unfiltered (gdb_stderr
,
833 "Magic number of %s target struct wrong\n",
835 internal_error (__FILE__
, __LINE__
,
836 _("failed internal consistency check"));
839 for (cur
= target_stack
; cur
!= NULL
; cur
= cur
->beneath
)
846 /* Default implementation of to_get_thread_local_address. */
849 generic_tls_error (void)
851 throw_error (TLS_GENERIC_ERROR
,
852 _("Cannot find thread-local variables on this target"));
855 /* Using the objfile specified in OBJFILE, find the address for the
856 current thread's thread-local storage with offset OFFSET. */
858 target_translate_tls_address (struct objfile
*objfile
, CORE_ADDR offset
)
860 volatile CORE_ADDR addr
= 0;
861 struct target_ops
*target
= ¤t_target
;
863 if (gdbarch_fetch_tls_load_module_address_p (target_gdbarch ()))
865 ptid_t ptid
= inferior_ptid
;
871 /* Fetch the load module address for this objfile. */
872 lm_addr
= gdbarch_fetch_tls_load_module_address (target_gdbarch (),
875 addr
= target
->to_get_thread_local_address (target
, ptid
,
878 /* If an error occurred, print TLS related messages here. Otherwise,
879 throw the error to some higher catcher. */
880 CATCH (ex
, RETURN_MASK_ALL
)
882 int objfile_is_library
= (objfile
->flags
& OBJF_SHARED
);
886 case TLS_NO_LIBRARY_SUPPORT_ERROR
:
887 error (_("Cannot find thread-local variables "
888 "in this thread library."));
890 case TLS_LOAD_MODULE_NOT_FOUND_ERROR
:
891 if (objfile_is_library
)
892 error (_("Cannot find shared library `%s' in dynamic"
893 " linker's load module list"), objfile_name (objfile
));
895 error (_("Cannot find executable file `%s' in dynamic"
896 " linker's load module list"), objfile_name (objfile
));
898 case TLS_NOT_ALLOCATED_YET_ERROR
:
899 if (objfile_is_library
)
900 error (_("The inferior has not yet allocated storage for"
901 " thread-local variables in\n"
902 "the shared library `%s'\n"
904 objfile_name (objfile
), target_pid_to_str (ptid
));
906 error (_("The inferior has not yet allocated storage for"
907 " thread-local variables in\n"
908 "the executable `%s'\n"
910 objfile_name (objfile
), target_pid_to_str (ptid
));
912 case TLS_GENERIC_ERROR
:
913 if (objfile_is_library
)
914 error (_("Cannot find thread-local storage for %s, "
915 "shared library %s:\n%s"),
916 target_pid_to_str (ptid
),
917 objfile_name (objfile
), ex
.message
);
919 error (_("Cannot find thread-local storage for %s, "
920 "executable file %s:\n%s"),
921 target_pid_to_str (ptid
),
922 objfile_name (objfile
), ex
.message
);
925 throw_exception (ex
);
931 /* It wouldn't be wrong here to try a gdbarch method, too; finding
932 TLS is an ABI-specific thing. But we don't do that yet. */
934 error (_("Cannot find thread-local variables on this target"));
940 target_xfer_status_to_string (enum target_xfer_status status
)
942 #define CASE(X) case X: return #X
945 CASE(TARGET_XFER_E_IO
);
946 CASE(TARGET_XFER_UNAVAILABLE
);
955 #define MIN(A, B) (((A) <= (B)) ? (A) : (B))
957 /* target_read_string -- read a null terminated string, up to LEN bytes,
958 from MEMADDR in target. Set *ERRNOP to the errno code, or 0 if successful.
959 Set *STRING to a pointer to malloc'd memory containing the data; the caller
960 is responsible for freeing it. Return the number of bytes successfully
964 target_read_string (CORE_ADDR memaddr
, char **string
, int len
, int *errnop
)
970 int buffer_allocated
;
972 unsigned int nbytes_read
= 0;
976 /* Small for testing. */
977 buffer_allocated
= 4;
978 buffer
= (char *) xmalloc (buffer_allocated
);
983 tlen
= MIN (len
, 4 - (memaddr
& 3));
984 offset
= memaddr
& 3;
986 errcode
= target_read_memory (memaddr
& ~3, buf
, sizeof buf
);
989 /* The transfer request might have crossed the boundary to an
990 unallocated region of memory. Retry the transfer, requesting
994 errcode
= target_read_memory (memaddr
, buf
, 1);
999 if (bufptr
- buffer
+ tlen
> buffer_allocated
)
1003 bytes
= bufptr
- buffer
;
1004 buffer_allocated
*= 2;
1005 buffer
= (char *) xrealloc (buffer
, buffer_allocated
);
1006 bufptr
= buffer
+ bytes
;
1009 for (i
= 0; i
< tlen
; i
++)
1011 *bufptr
++ = buf
[i
+ offset
];
1012 if (buf
[i
+ offset
] == '\000')
1014 nbytes_read
+= i
+ 1;
1021 nbytes_read
+= tlen
;
1030 struct target_section_table
*
1031 target_get_section_table (struct target_ops
*target
)
1033 return (*target
->to_get_section_table
) (target
);
1036 /* Find a section containing ADDR. */
1038 struct target_section
*
1039 target_section_by_addr (struct target_ops
*target
, CORE_ADDR addr
)
1041 struct target_section_table
*table
= target_get_section_table (target
);
1042 struct target_section
*secp
;
1047 for (secp
= table
->sections
; secp
< table
->sections_end
; secp
++)
1049 if (addr
>= secp
->addr
&& addr
< secp
->endaddr
)
1056 /* Helper for the memory xfer routines. Checks the attributes of the
1057 memory region of MEMADDR against the read or write being attempted.
1058 If the access is permitted returns true, otherwise returns false.
1059 REGION_P is an optional output parameter. If not-NULL, it is
1060 filled with a pointer to the memory region of MEMADDR. REG_LEN
1061 returns LEN trimmed to the end of the region. This is how much the
1062 caller can continue requesting, if the access is permitted. A
1063 single xfer request must not straddle memory region boundaries. */
1066 memory_xfer_check_region (gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1067 ULONGEST memaddr
, ULONGEST len
, ULONGEST
*reg_len
,
1068 struct mem_region
**region_p
)
1070 struct mem_region
*region
;
1072 region
= lookup_mem_region (memaddr
);
1074 if (region_p
!= NULL
)
1077 switch (region
->attrib
.mode
)
1080 if (writebuf
!= NULL
)
1085 if (readbuf
!= NULL
)
1090 /* We only support writing to flash during "load" for now. */
1091 if (writebuf
!= NULL
)
1092 error (_("Writing to flash memory forbidden in this context"));
1099 /* region->hi == 0 means there's no upper bound. */
1100 if (memaddr
+ len
< region
->hi
|| region
->hi
== 0)
1103 *reg_len
= region
->hi
- memaddr
;
1108 /* Read memory from more than one valid target. A core file, for
1109 instance, could have some of memory but delegate other bits to
1110 the target below it. So, we must manually try all targets. */
1112 enum target_xfer_status
1113 raw_memory_xfer_partial (struct target_ops
*ops
, gdb_byte
*readbuf
,
1114 const gdb_byte
*writebuf
, ULONGEST memaddr
, LONGEST len
,
1115 ULONGEST
*xfered_len
)
1117 enum target_xfer_status res
;
1121 res
= ops
->to_xfer_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1122 readbuf
, writebuf
, memaddr
, len
,
1124 if (res
== TARGET_XFER_OK
)
1127 /* Stop if the target reports that the memory is not available. */
1128 if (res
== TARGET_XFER_UNAVAILABLE
)
1131 /* We want to continue past core files to executables, but not
1132 past a running target's memory. */
1133 if (ops
->to_has_all_memory (ops
))
1138 while (ops
!= NULL
);
1140 /* The cache works at the raw memory level. Make sure the cache
1141 gets updated with raw contents no matter what kind of memory
1142 object was originally being written. Note we do write-through
1143 first, so that if it fails, we don't write to the cache contents
1144 that never made it to the target. */
1145 if (writebuf
!= NULL
1146 && !ptid_equal (inferior_ptid
, null_ptid
)
1147 && target_dcache_init_p ()
1148 && (stack_cache_enabled_p () || code_cache_enabled_p ()))
1150 DCACHE
*dcache
= target_dcache_get ();
1152 /* Note that writing to an area of memory which wasn't present
1153 in the cache doesn't cause it to be loaded in. */
1154 dcache_update (dcache
, res
, memaddr
, writebuf
, *xfered_len
);
1160 /* Perform a partial memory transfer.
1161 For docs see target.h, to_xfer_partial. */
1163 static enum target_xfer_status
1164 memory_xfer_partial_1 (struct target_ops
*ops
, enum target_object object
,
1165 gdb_byte
*readbuf
, const gdb_byte
*writebuf
, ULONGEST memaddr
,
1166 ULONGEST len
, ULONGEST
*xfered_len
)
1168 enum target_xfer_status res
;
1170 struct mem_region
*region
;
1171 struct inferior
*inf
;
1173 /* For accesses to unmapped overlay sections, read directly from
1174 files. Must do this first, as MEMADDR may need adjustment. */
1175 if (readbuf
!= NULL
&& overlay_debugging
)
1177 struct obj_section
*section
= find_pc_overlay (memaddr
);
1179 if (pc_in_unmapped_range (memaddr
, section
))
1181 struct target_section_table
*table
1182 = target_get_section_table (ops
);
1183 const char *section_name
= section
->the_bfd_section
->name
;
1185 memaddr
= overlay_mapped_address (memaddr
, section
);
1186 return section_table_xfer_memory_partial (readbuf
, writebuf
,
1187 memaddr
, len
, xfered_len
,
1189 table
->sections_end
,
1194 /* Try the executable files, if "trust-readonly-sections" is set. */
1195 if (readbuf
!= NULL
&& trust_readonly
)
1197 struct target_section
*secp
;
1198 struct target_section_table
*table
;
1200 secp
= target_section_by_addr (ops
, memaddr
);
1202 && (bfd_get_section_flags (secp
->the_bfd_section
->owner
,
1203 secp
->the_bfd_section
)
1206 table
= target_get_section_table (ops
);
1207 return section_table_xfer_memory_partial (readbuf
, writebuf
,
1208 memaddr
, len
, xfered_len
,
1210 table
->sections_end
,
1215 /* Try GDB's internal data cache. */
1217 if (!memory_xfer_check_region (readbuf
, writebuf
, memaddr
, len
, ®_len
,
1219 return TARGET_XFER_E_IO
;
1221 if (!ptid_equal (inferior_ptid
, null_ptid
))
1222 inf
= find_inferior_ptid (inferior_ptid
);
1228 /* The dcache reads whole cache lines; that doesn't play well
1229 with reading from a trace buffer, because reading outside of
1230 the collected memory range fails. */
1231 && get_traceframe_number () == -1
1232 && (region
->attrib
.cache
1233 || (stack_cache_enabled_p () && object
== TARGET_OBJECT_STACK_MEMORY
)
1234 || (code_cache_enabled_p () && object
== TARGET_OBJECT_CODE_MEMORY
)))
1236 DCACHE
*dcache
= target_dcache_get_or_init ();
1238 return dcache_read_memory_partial (ops
, dcache
, memaddr
, readbuf
,
1239 reg_len
, xfered_len
);
1242 /* If none of those methods found the memory we wanted, fall back
1243 to a target partial transfer. Normally a single call to
1244 to_xfer_partial is enough; if it doesn't recognize an object
1245 it will call the to_xfer_partial of the next target down.
1246 But for memory this won't do. Memory is the only target
1247 object which can be read from more than one valid target.
1248 A core file, for instance, could have some of memory but
1249 delegate other bits to the target below it. So, we must
1250 manually try all targets. */
1252 res
= raw_memory_xfer_partial (ops
, readbuf
, writebuf
, memaddr
, reg_len
,
1255 /* If we still haven't got anything, return the last error. We
1260 /* Perform a partial memory transfer. For docs see target.h,
1263 static enum target_xfer_status
1264 memory_xfer_partial (struct target_ops
*ops
, enum target_object object
,
1265 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1266 ULONGEST memaddr
, ULONGEST len
, ULONGEST
*xfered_len
)
1268 enum target_xfer_status res
;
1270 /* Zero length requests are ok and require no work. */
1272 return TARGET_XFER_EOF
;
1274 /* Fill in READBUF with breakpoint shadows, or WRITEBUF with
1275 breakpoint insns, thus hiding out from higher layers whether
1276 there are software breakpoints inserted in the code stream. */
1277 if (readbuf
!= NULL
)
1279 res
= memory_xfer_partial_1 (ops
, object
, readbuf
, NULL
, memaddr
, len
,
1282 if (res
== TARGET_XFER_OK
&& !show_memory_breakpoints
)
1283 breakpoint_xfer_memory (readbuf
, NULL
, NULL
, memaddr
, *xfered_len
);
1288 struct cleanup
*old_chain
;
1290 /* A large write request is likely to be partially satisfied
1291 by memory_xfer_partial_1. We will continually malloc
1292 and free a copy of the entire write request for breakpoint
1293 shadow handling even though we only end up writing a small
1294 subset of it. Cap writes to a limit specified by the target
1295 to mitigate this. */
1296 len
= std::min (ops
->to_get_memory_xfer_limit (ops
), len
);
1298 buf
= (gdb_byte
*) xmalloc (len
);
1299 old_chain
= make_cleanup (xfree
, buf
);
1300 memcpy (buf
, writebuf
, len
);
1302 breakpoint_xfer_memory (NULL
, buf
, writebuf
, memaddr
, len
);
1303 res
= memory_xfer_partial_1 (ops
, object
, NULL
, buf
, memaddr
, len
,
1306 do_cleanups (old_chain
);
1313 restore_show_memory_breakpoints (void *arg
)
1315 show_memory_breakpoints
= (uintptr_t) arg
;
1319 make_show_memory_breakpoints_cleanup (int show
)
1321 int current
= show_memory_breakpoints
;
1323 show_memory_breakpoints
= show
;
1324 return make_cleanup (restore_show_memory_breakpoints
,
1325 (void *) (uintptr_t) current
);
1328 /* For docs see target.h, to_xfer_partial. */
1330 enum target_xfer_status
1331 target_xfer_partial (struct target_ops
*ops
,
1332 enum target_object object
, const char *annex
,
1333 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1334 ULONGEST offset
, ULONGEST len
,
1335 ULONGEST
*xfered_len
)
1337 enum target_xfer_status retval
;
1339 gdb_assert (ops
->to_xfer_partial
!= NULL
);
1341 /* Transfer is done when LEN is zero. */
1343 return TARGET_XFER_EOF
;
1345 if (writebuf
&& !may_write_memory
)
1346 error (_("Writing to memory is not allowed (addr %s, len %s)"),
1347 core_addr_to_string_nz (offset
), plongest (len
));
1351 /* If this is a memory transfer, let the memory-specific code
1352 have a look at it instead. Memory transfers are more
1354 if (object
== TARGET_OBJECT_MEMORY
|| object
== TARGET_OBJECT_STACK_MEMORY
1355 || object
== TARGET_OBJECT_CODE_MEMORY
)
1356 retval
= memory_xfer_partial (ops
, object
, readbuf
,
1357 writebuf
, offset
, len
, xfered_len
);
1358 else if (object
== TARGET_OBJECT_RAW_MEMORY
)
1360 /* Skip/avoid accessing the target if the memory region
1361 attributes block the access. Check this here instead of in
1362 raw_memory_xfer_partial as otherwise we'd end up checking
1363 this twice in the case of the memory_xfer_partial path is
1364 taken; once before checking the dcache, and another in the
1365 tail call to raw_memory_xfer_partial. */
1366 if (!memory_xfer_check_region (readbuf
, writebuf
, offset
, len
, &len
,
1368 return TARGET_XFER_E_IO
;
1370 /* Request the normal memory object from other layers. */
1371 retval
= raw_memory_xfer_partial (ops
, readbuf
, writebuf
, offset
, len
,
1375 retval
= ops
->to_xfer_partial (ops
, object
, annex
, readbuf
,
1376 writebuf
, offset
, len
, xfered_len
);
1380 const unsigned char *myaddr
= NULL
;
1382 fprintf_unfiltered (gdb_stdlog
,
1383 "%s:target_xfer_partial "
1384 "(%d, %s, %s, %s, %s, %s) = %d, %s",
1387 (annex
? annex
: "(null)"),
1388 host_address_to_string (readbuf
),
1389 host_address_to_string (writebuf
),
1390 core_addr_to_string_nz (offset
),
1391 pulongest (len
), retval
,
1392 pulongest (*xfered_len
));
1398 if (retval
== TARGET_XFER_OK
&& myaddr
!= NULL
)
1402 fputs_unfiltered (", bytes =", gdb_stdlog
);
1403 for (i
= 0; i
< *xfered_len
; i
++)
1405 if ((((intptr_t) &(myaddr
[i
])) & 0xf) == 0)
1407 if (targetdebug
< 2 && i
> 0)
1409 fprintf_unfiltered (gdb_stdlog
, " ...");
1412 fprintf_unfiltered (gdb_stdlog
, "\n");
1415 fprintf_unfiltered (gdb_stdlog
, " %02x", myaddr
[i
] & 0xff);
1419 fputc_unfiltered ('\n', gdb_stdlog
);
1422 /* Check implementations of to_xfer_partial update *XFERED_LEN
1423 properly. Do assertion after printing debug messages, so that we
1424 can find more clues on assertion failure from debugging messages. */
1425 if (retval
== TARGET_XFER_OK
|| retval
== TARGET_XFER_UNAVAILABLE
)
1426 gdb_assert (*xfered_len
> 0);
1431 /* Read LEN bytes of target memory at address MEMADDR, placing the
1432 results in GDB's memory at MYADDR. Returns either 0 for success or
1433 -1 if any error occurs.
1435 If an error occurs, no guarantee is made about the contents of the data at
1436 MYADDR. In particular, the caller should not depend upon partial reads
1437 filling the buffer with good data. There is no way for the caller to know
1438 how much good data might have been transfered anyway. Callers that can
1439 deal with partial reads should call target_read (which will retry until
1440 it makes no progress, and then return how much was transferred). */
1443 target_read_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1445 /* Dispatch to the topmost target, not the flattened current_target.
1446 Memory accesses check target->to_has_(all_)memory, and the
1447 flattened target doesn't inherit those. */
1448 if (target_read (current_target
.beneath
, TARGET_OBJECT_MEMORY
, NULL
,
1449 myaddr
, memaddr
, len
) == len
)
1455 /* See target/target.h. */
1458 target_read_uint32 (CORE_ADDR memaddr
, uint32_t *result
)
1463 r
= target_read_memory (memaddr
, buf
, sizeof buf
);
1466 *result
= extract_unsigned_integer (buf
, sizeof buf
,
1467 gdbarch_byte_order (target_gdbarch ()));
1471 /* Like target_read_memory, but specify explicitly that this is a read
1472 from the target's raw memory. That is, this read bypasses the
1473 dcache, breakpoint shadowing, etc. */
1476 target_read_raw_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1478 /* See comment in target_read_memory about why the request starts at
1479 current_target.beneath. */
1480 if (target_read (current_target
.beneath
, TARGET_OBJECT_RAW_MEMORY
, NULL
,
1481 myaddr
, memaddr
, len
) == len
)
1487 /* Like target_read_memory, but specify explicitly that this is a read from
1488 the target's stack. This may trigger different cache behavior. */
1491 target_read_stack (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1493 /* See comment in target_read_memory about why the request starts at
1494 current_target.beneath. */
1495 if (target_read (current_target
.beneath
, TARGET_OBJECT_STACK_MEMORY
, NULL
,
1496 myaddr
, memaddr
, len
) == len
)
1502 /* Like target_read_memory, but specify explicitly that this is a read from
1503 the target's code. This may trigger different cache behavior. */
1506 target_read_code (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1508 /* See comment in target_read_memory about why the request starts at
1509 current_target.beneath. */
1510 if (target_read (current_target
.beneath
, TARGET_OBJECT_CODE_MEMORY
, NULL
,
1511 myaddr
, memaddr
, len
) == len
)
1517 /* Write LEN bytes from MYADDR to target memory at address MEMADDR.
1518 Returns either 0 for success or -1 if any error occurs. If an
1519 error occurs, no guarantee is made about how much data got written.
1520 Callers that can deal with partial writes should call
1524 target_write_memory (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ssize_t len
)
1526 /* See comment in target_read_memory about why the request starts at
1527 current_target.beneath. */
1528 if (target_write (current_target
.beneath
, TARGET_OBJECT_MEMORY
, NULL
,
1529 myaddr
, memaddr
, len
) == len
)
1535 /* Write LEN bytes from MYADDR to target raw memory at address
1536 MEMADDR. Returns either 0 for success or -1 if any error occurs.
1537 If an error occurs, no guarantee is made about how much data got
1538 written. Callers that can deal with partial writes should call
1542 target_write_raw_memory (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ssize_t len
)
1544 /* See comment in target_read_memory about why the request starts at
1545 current_target.beneath. */
1546 if (target_write (current_target
.beneath
, TARGET_OBJECT_RAW_MEMORY
, NULL
,
1547 myaddr
, memaddr
, len
) == len
)
1553 /* Fetch the target's memory map. */
1556 target_memory_map (void)
1558 VEC(mem_region_s
) *result
;
1559 struct mem_region
*last_one
, *this_one
;
1561 result
= current_target
.to_memory_map (¤t_target
);
1565 qsort (VEC_address (mem_region_s
, result
),
1566 VEC_length (mem_region_s
, result
),
1567 sizeof (struct mem_region
), mem_region_cmp
);
1569 /* Check that regions do not overlap. Simultaneously assign
1570 a numbering for the "mem" commands to use to refer to
1573 for (ix
= 0; VEC_iterate (mem_region_s
, result
, ix
, this_one
); ix
++)
1575 this_one
->number
= ix
;
1577 if (last_one
&& last_one
->hi
> this_one
->lo
)
1579 warning (_("Overlapping regions in memory map: ignoring"));
1580 VEC_free (mem_region_s
, result
);
1583 last_one
= this_one
;
1590 target_flash_erase (ULONGEST address
, LONGEST length
)
1592 current_target
.to_flash_erase (¤t_target
, address
, length
);
1596 target_flash_done (void)
1598 current_target
.to_flash_done (¤t_target
);
1602 show_trust_readonly (struct ui_file
*file
, int from_tty
,
1603 struct cmd_list_element
*c
, const char *value
)
1605 fprintf_filtered (file
,
1606 _("Mode for reading from readonly sections is %s.\n"),
1610 /* Target vector read/write partial wrapper functions. */
1612 static enum target_xfer_status
1613 target_read_partial (struct target_ops
*ops
,
1614 enum target_object object
,
1615 const char *annex
, gdb_byte
*buf
,
1616 ULONGEST offset
, ULONGEST len
,
1617 ULONGEST
*xfered_len
)
1619 return target_xfer_partial (ops
, object
, annex
, buf
, NULL
, offset
, len
,
1623 static enum target_xfer_status
1624 target_write_partial (struct target_ops
*ops
,
1625 enum target_object object
,
1626 const char *annex
, const gdb_byte
*buf
,
1627 ULONGEST offset
, LONGEST len
, ULONGEST
*xfered_len
)
1629 return target_xfer_partial (ops
, object
, annex
, NULL
, buf
, offset
, len
,
1633 /* Wrappers to perform the full transfer. */
1635 /* For docs on target_read see target.h. */
1638 target_read (struct target_ops
*ops
,
1639 enum target_object object
,
1640 const char *annex
, gdb_byte
*buf
,
1641 ULONGEST offset
, LONGEST len
)
1643 LONGEST xfered_total
= 0;
1646 /* If we are reading from a memory object, find the length of an addressable
1647 unit for that architecture. */
1648 if (object
== TARGET_OBJECT_MEMORY
1649 || object
== TARGET_OBJECT_STACK_MEMORY
1650 || object
== TARGET_OBJECT_CODE_MEMORY
1651 || object
== TARGET_OBJECT_RAW_MEMORY
)
1652 unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
1654 while (xfered_total
< len
)
1656 ULONGEST xfered_partial
;
1657 enum target_xfer_status status
;
1659 status
= target_read_partial (ops
, object
, annex
,
1660 buf
+ xfered_total
* unit_size
,
1661 offset
+ xfered_total
, len
- xfered_total
,
1664 /* Call an observer, notifying them of the xfer progress? */
1665 if (status
== TARGET_XFER_EOF
)
1666 return xfered_total
;
1667 else if (status
== TARGET_XFER_OK
)
1669 xfered_total
+= xfered_partial
;
1673 return TARGET_XFER_E_IO
;
1679 /* Assuming that the entire [begin, end) range of memory cannot be
1680 read, try to read whatever subrange is possible to read.
1682 The function returns, in RESULT, either zero or one memory block.
1683 If there's a readable subrange at the beginning, it is completely
1684 read and returned. Any further readable subrange will not be read.
1685 Otherwise, if there's a readable subrange at the end, it will be
1686 completely read and returned. Any readable subranges before it
1687 (obviously, not starting at the beginning), will be ignored. In
1688 other cases -- either no readable subrange, or readable subrange(s)
1689 that is neither at the beginning, or end, nothing is returned.
1691 The purpose of this function is to handle a read across a boundary
1692 of accessible memory in a case when memory map is not available.
1693 The above restrictions are fine for this case, but will give
1694 incorrect results if the memory is 'patchy'. However, supporting
1695 'patchy' memory would require trying to read every single byte,
1696 and it seems unacceptable solution. Explicit memory map is
1697 recommended for this case -- and target_read_memory_robust will
1698 take care of reading multiple ranges then. */
1701 read_whatever_is_readable (struct target_ops
*ops
,
1702 const ULONGEST begin
, const ULONGEST end
,
1704 VEC(memory_read_result_s
) **result
)
1706 gdb_byte
*buf
= (gdb_byte
*) xmalloc (end
- begin
);
1707 ULONGEST current_begin
= begin
;
1708 ULONGEST current_end
= end
;
1710 memory_read_result_s r
;
1711 ULONGEST xfered_len
;
1713 /* If we previously failed to read 1 byte, nothing can be done here. */
1714 if (end
- begin
<= 1)
1720 /* Check that either first or the last byte is readable, and give up
1721 if not. This heuristic is meant to permit reading accessible memory
1722 at the boundary of accessible region. */
1723 if (target_read_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1724 buf
, begin
, 1, &xfered_len
) == TARGET_XFER_OK
)
1729 else if (target_read_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1730 buf
+ (end
- begin
) - 1, end
- 1, 1,
1731 &xfered_len
) == TARGET_XFER_OK
)
1742 /* Loop invariant is that the [current_begin, current_end) was previously
1743 found to be not readable as a whole.
1745 Note loop condition -- if the range has 1 byte, we can't divide the range
1746 so there's no point trying further. */
1747 while (current_end
- current_begin
> 1)
1749 ULONGEST first_half_begin
, first_half_end
;
1750 ULONGEST second_half_begin
, second_half_end
;
1752 ULONGEST middle
= current_begin
+ (current_end
- current_begin
) / 2;
1756 first_half_begin
= current_begin
;
1757 first_half_end
= middle
;
1758 second_half_begin
= middle
;
1759 second_half_end
= current_end
;
1763 first_half_begin
= middle
;
1764 first_half_end
= current_end
;
1765 second_half_begin
= current_begin
;
1766 second_half_end
= middle
;
1769 xfer
= target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1770 buf
+ (first_half_begin
- begin
) * unit_size
,
1772 first_half_end
- first_half_begin
);
1774 if (xfer
== first_half_end
- first_half_begin
)
1776 /* This half reads up fine. So, the error must be in the
1778 current_begin
= second_half_begin
;
1779 current_end
= second_half_end
;
1783 /* This half is not readable. Because we've tried one byte, we
1784 know some part of this half if actually readable. Go to the next
1785 iteration to divide again and try to read.
1787 We don't handle the other half, because this function only tries
1788 to read a single readable subrange. */
1789 current_begin
= first_half_begin
;
1790 current_end
= first_half_end
;
1796 /* The [begin, current_begin) range has been read. */
1798 r
.end
= current_begin
;
1803 /* The [current_end, end) range has been read. */
1804 LONGEST region_len
= end
- current_end
;
1806 r
.data
= (gdb_byte
*) xmalloc (region_len
* unit_size
);
1807 memcpy (r
.data
, buf
+ (current_end
- begin
) * unit_size
,
1808 region_len
* unit_size
);
1809 r
.begin
= current_end
;
1813 VEC_safe_push(memory_read_result_s
, (*result
), &r
);
1817 free_memory_read_result_vector (void *x
)
1819 VEC(memory_read_result_s
) **v
= (VEC(memory_read_result_s
) **) x
;
1820 memory_read_result_s
*current
;
1823 for (ix
= 0; VEC_iterate (memory_read_result_s
, *v
, ix
, current
); ++ix
)
1825 xfree (current
->data
);
1827 VEC_free (memory_read_result_s
, *v
);
1830 VEC(memory_read_result_s
) *
1831 read_memory_robust (struct target_ops
*ops
,
1832 const ULONGEST offset
, const LONGEST len
)
1834 VEC(memory_read_result_s
) *result
= 0;
1835 int unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
1836 struct cleanup
*cleanup
= make_cleanup (free_memory_read_result_vector
,
1839 LONGEST xfered_total
= 0;
1840 while (xfered_total
< len
)
1842 struct mem_region
*region
= lookup_mem_region (offset
+ xfered_total
);
1845 /* If there is no explicit region, a fake one should be created. */
1846 gdb_assert (region
);
1848 if (region
->hi
== 0)
1849 region_len
= len
- xfered_total
;
1851 region_len
= region
->hi
- offset
;
1853 if (region
->attrib
.mode
== MEM_NONE
|| region
->attrib
.mode
== MEM_WO
)
1855 /* Cannot read this region. Note that we can end up here only
1856 if the region is explicitly marked inaccessible, or
1857 'inaccessible-by-default' is in effect. */
1858 xfered_total
+= region_len
;
1862 LONGEST to_read
= std::min (len
- xfered_total
, region_len
);
1863 gdb_byte
*buffer
= (gdb_byte
*) xmalloc (to_read
* unit_size
);
1864 struct cleanup
*inner_cleanup
= make_cleanup (xfree
, buffer
);
1866 LONGEST xfered_partial
=
1867 target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1868 (gdb_byte
*) buffer
,
1869 offset
+ xfered_total
, to_read
);
1870 /* Call an observer, notifying them of the xfer progress? */
1871 if (xfered_partial
<= 0)
1873 /* Got an error reading full chunk. See if maybe we can read
1875 do_cleanups (inner_cleanup
);
1876 read_whatever_is_readable (ops
, offset
+ xfered_total
,
1877 offset
+ xfered_total
+ to_read
,
1878 unit_size
, &result
);
1879 xfered_total
+= to_read
;
1883 struct memory_read_result r
;
1885 discard_cleanups (inner_cleanup
);
1887 r
.begin
= offset
+ xfered_total
;
1888 r
.end
= r
.begin
+ xfered_partial
;
1889 VEC_safe_push (memory_read_result_s
, result
, &r
);
1890 xfered_total
+= xfered_partial
;
1896 discard_cleanups (cleanup
);
1901 /* An alternative to target_write with progress callbacks. */
1904 target_write_with_progress (struct target_ops
*ops
,
1905 enum target_object object
,
1906 const char *annex
, const gdb_byte
*buf
,
1907 ULONGEST offset
, LONGEST len
,
1908 void (*progress
) (ULONGEST
, void *), void *baton
)
1910 LONGEST xfered_total
= 0;
1913 /* If we are writing to a memory object, find the length of an addressable
1914 unit for that architecture. */
1915 if (object
== TARGET_OBJECT_MEMORY
1916 || object
== TARGET_OBJECT_STACK_MEMORY
1917 || object
== TARGET_OBJECT_CODE_MEMORY
1918 || object
== TARGET_OBJECT_RAW_MEMORY
)
1919 unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
1921 /* Give the progress callback a chance to set up. */
1923 (*progress
) (0, baton
);
1925 while (xfered_total
< len
)
1927 ULONGEST xfered_partial
;
1928 enum target_xfer_status status
;
1930 status
= target_write_partial (ops
, object
, annex
,
1931 buf
+ xfered_total
* unit_size
,
1932 offset
+ xfered_total
, len
- xfered_total
,
1935 if (status
!= TARGET_XFER_OK
)
1936 return status
== TARGET_XFER_EOF
? xfered_total
: TARGET_XFER_E_IO
;
1939 (*progress
) (xfered_partial
, baton
);
1941 xfered_total
+= xfered_partial
;
1947 /* For docs on target_write see target.h. */
1950 target_write (struct target_ops
*ops
,
1951 enum target_object object
,
1952 const char *annex
, const gdb_byte
*buf
,
1953 ULONGEST offset
, LONGEST len
)
1955 return target_write_with_progress (ops
, object
, annex
, buf
, offset
, len
,
1959 /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return
1960 the size of the transferred data. PADDING additional bytes are
1961 available in *BUF_P. This is a helper function for
1962 target_read_alloc; see the declaration of that function for more
1966 target_read_alloc_1 (struct target_ops
*ops
, enum target_object object
,
1967 const char *annex
, gdb_byte
**buf_p
, int padding
)
1969 size_t buf_alloc
, buf_pos
;
1972 /* This function does not have a length parameter; it reads the
1973 entire OBJECT). Also, it doesn't support objects fetched partly
1974 from one target and partly from another (in a different stratum,
1975 e.g. a core file and an executable). Both reasons make it
1976 unsuitable for reading memory. */
1977 gdb_assert (object
!= TARGET_OBJECT_MEMORY
);
1979 /* Start by reading up to 4K at a time. The target will throttle
1980 this number down if necessary. */
1982 buf
= (gdb_byte
*) xmalloc (buf_alloc
);
1986 ULONGEST xfered_len
;
1987 enum target_xfer_status status
;
1989 status
= target_read_partial (ops
, object
, annex
, &buf
[buf_pos
],
1990 buf_pos
, buf_alloc
- buf_pos
- padding
,
1993 if (status
== TARGET_XFER_EOF
)
1995 /* Read all there was. */
2002 else if (status
!= TARGET_XFER_OK
)
2004 /* An error occurred. */
2006 return TARGET_XFER_E_IO
;
2009 buf_pos
+= xfered_len
;
2011 /* If the buffer is filling up, expand it. */
2012 if (buf_alloc
< buf_pos
* 2)
2015 buf
= (gdb_byte
*) xrealloc (buf
, buf_alloc
);
2022 /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return
2023 the size of the transferred data. See the declaration in "target.h"
2024 function for more information about the return value. */
2027 target_read_alloc (struct target_ops
*ops
, enum target_object object
,
2028 const char *annex
, gdb_byte
**buf_p
)
2030 return target_read_alloc_1 (ops
, object
, annex
, buf_p
, 0);
2033 /* Read OBJECT/ANNEX using OPS. The result is NUL-terminated and
2034 returned as a string, allocated using xmalloc. If an error occurs
2035 or the transfer is unsupported, NULL is returned. Empty objects
2036 are returned as allocated but empty strings. A warning is issued
2037 if the result contains any embedded NUL bytes. */
2040 target_read_stralloc (struct target_ops
*ops
, enum target_object object
,
2045 LONGEST i
, transferred
;
2047 transferred
= target_read_alloc_1 (ops
, object
, annex
, &buffer
, 1);
2048 bufstr
= (char *) buffer
;
2050 if (transferred
< 0)
2053 if (transferred
== 0)
2054 return xstrdup ("");
2056 bufstr
[transferred
] = 0;
2058 /* Check for embedded NUL bytes; but allow trailing NULs. */
2059 for (i
= strlen (bufstr
); i
< transferred
; i
++)
2062 warning (_("target object %d, annex %s, "
2063 "contained unexpected null characters"),
2064 (int) object
, annex
? annex
: "(none)");
2071 /* Memory transfer methods. */
2074 get_target_memory (struct target_ops
*ops
, CORE_ADDR addr
, gdb_byte
*buf
,
2077 /* This method is used to read from an alternate, non-current
2078 target. This read must bypass the overlay support (as symbols
2079 don't match this target), and GDB's internal cache (wrong cache
2080 for this target). */
2081 if (target_read (ops
, TARGET_OBJECT_RAW_MEMORY
, NULL
, buf
, addr
, len
)
2083 memory_error (TARGET_XFER_E_IO
, addr
);
2087 get_target_memory_unsigned (struct target_ops
*ops
, CORE_ADDR addr
,
2088 int len
, enum bfd_endian byte_order
)
2090 gdb_byte buf
[sizeof (ULONGEST
)];
2092 gdb_assert (len
<= sizeof (buf
));
2093 get_target_memory (ops
, addr
, buf
, len
);
2094 return extract_unsigned_integer (buf
, len
, byte_order
);
2100 target_insert_breakpoint (struct gdbarch
*gdbarch
,
2101 struct bp_target_info
*bp_tgt
)
2103 if (!may_insert_breakpoints
)
2105 warning (_("May not insert breakpoints"));
2109 return current_target
.to_insert_breakpoint (¤t_target
,
2116 target_remove_breakpoint (struct gdbarch
*gdbarch
,
2117 struct bp_target_info
*bp_tgt
,
2118 enum remove_bp_reason reason
)
2120 /* This is kind of a weird case to handle, but the permission might
2121 have been changed after breakpoints were inserted - in which case
2122 we should just take the user literally and assume that any
2123 breakpoints should be left in place. */
2124 if (!may_insert_breakpoints
)
2126 warning (_("May not remove breakpoints"));
2130 return current_target
.to_remove_breakpoint (¤t_target
,
2131 gdbarch
, bp_tgt
, reason
);
2135 target_info (char *args
, int from_tty
)
2137 struct target_ops
*t
;
2138 int has_all_mem
= 0;
2140 if (symfile_objfile
!= NULL
)
2141 printf_unfiltered (_("Symbols from \"%s\".\n"),
2142 objfile_name (symfile_objfile
));
2144 for (t
= target_stack
; t
!= NULL
; t
= t
->beneath
)
2146 if (!(*t
->to_has_memory
) (t
))
2149 if ((int) (t
->to_stratum
) <= (int) dummy_stratum
)
2152 printf_unfiltered (_("\tWhile running this, "
2153 "GDB does not access memory from...\n"));
2154 printf_unfiltered ("%s:\n", t
->to_longname
);
2155 (t
->to_files_info
) (t
);
2156 has_all_mem
= (*t
->to_has_all_memory
) (t
);
2160 /* This function is called before any new inferior is created, e.g.
2161 by running a program, attaching, or connecting to a target.
2162 It cleans up any state from previous invocations which might
2163 change between runs. This is a subset of what target_preopen
2164 resets (things which might change between targets). */
2167 target_pre_inferior (int from_tty
)
2169 /* Clear out solib state. Otherwise the solib state of the previous
2170 inferior might have survived and is entirely wrong for the new
2171 target. This has been observed on GNU/Linux using glibc 2.3. How
2183 Cannot access memory at address 0xdeadbeef
2186 /* In some OSs, the shared library list is the same/global/shared
2187 across inferiors. If code is shared between processes, so are
2188 memory regions and features. */
2189 if (!gdbarch_has_global_solist (target_gdbarch ()))
2191 no_shared_libraries (NULL
, from_tty
);
2193 invalidate_target_mem_regions ();
2195 target_clear_description ();
2198 /* attach_flag may be set if the previous process associated with
2199 the inferior was attached to. */
2200 current_inferior ()->attach_flag
= 0;
2202 current_inferior ()->highest_thread_num
= 0;
2204 agent_capability_invalidate ();
2207 /* Callback for iterate_over_inferiors. Gets rid of the given
2211 dispose_inferior (struct inferior
*inf
, void *args
)
2213 struct thread_info
*thread
;
2215 thread
= any_thread_of_process (inf
->pid
);
2218 switch_to_thread (thread
->ptid
);
2220 /* Core inferiors actually should be detached, not killed. */
2221 if (target_has_execution
)
2224 target_detach (NULL
, 0);
2230 /* This is to be called by the open routine before it does
2234 target_preopen (int from_tty
)
2238 if (have_inferiors ())
2241 || !have_live_inferiors ()
2242 || query (_("A program is being debugged already. Kill it? ")))
2243 iterate_over_inferiors (dispose_inferior
, NULL
);
2245 error (_("Program not killed."));
2248 /* Calling target_kill may remove the target from the stack. But if
2249 it doesn't (which seems like a win for UDI), remove it now. */
2250 /* Leave the exec target, though. The user may be switching from a
2251 live process to a core of the same program. */
2252 pop_all_targets_above (file_stratum
);
2254 target_pre_inferior (from_tty
);
2257 /* Detach a target after doing deferred register stores. */
2260 target_detach (const char *args
, int from_tty
)
2262 if (gdbarch_has_global_breakpoints (target_gdbarch ()))
2263 /* Don't remove global breakpoints here. They're removed on
2264 disconnection from the target. */
2267 /* If we're in breakpoints-always-inserted mode, have to remove
2268 them before detaching. */
2269 remove_breakpoints_pid (ptid_get_pid (inferior_ptid
));
2271 prepare_for_detach ();
2273 current_target
.to_detach (¤t_target
, args
, from_tty
);
2277 target_disconnect (const char *args
, int from_tty
)
2279 /* If we're in breakpoints-always-inserted mode or if breakpoints
2280 are global across processes, we have to remove them before
2282 remove_breakpoints ();
2284 current_target
.to_disconnect (¤t_target
, args
, from_tty
);
2287 /* See target/target.h. */
2290 target_wait (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
2292 return (current_target
.to_wait
) (¤t_target
, ptid
, status
, options
);
2298 default_target_wait (struct target_ops
*ops
,
2299 ptid_t ptid
, struct target_waitstatus
*status
,
2302 status
->kind
= TARGET_WAITKIND_IGNORE
;
2303 return minus_one_ptid
;
2307 target_pid_to_str (ptid_t ptid
)
2309 return (*current_target
.to_pid_to_str
) (¤t_target
, ptid
);
2313 target_thread_name (struct thread_info
*info
)
2315 return current_target
.to_thread_name (¤t_target
, info
);
2319 target_resume (ptid_t ptid
, int step
, enum gdb_signal signal
)
2321 target_dcache_invalidate ();
2323 current_target
.to_resume (¤t_target
, ptid
, step
, signal
);
2325 registers_changed_ptid (ptid
);
2326 /* We only set the internal executing state here. The user/frontend
2327 running state is set at a higher level. */
2328 set_executing (ptid
, 1);
2329 clear_inline_frame_state (ptid
);
2333 target_pass_signals (int numsigs
, unsigned char *pass_signals
)
2335 (*current_target
.to_pass_signals
) (¤t_target
, numsigs
, pass_signals
);
2339 target_program_signals (int numsigs
, unsigned char *program_signals
)
2341 (*current_target
.to_program_signals
) (¤t_target
,
2342 numsigs
, program_signals
);
2346 default_follow_fork (struct target_ops
*self
, int follow_child
,
2349 /* Some target returned a fork event, but did not know how to follow it. */
2350 internal_error (__FILE__
, __LINE__
,
2351 _("could not find a target to follow fork"));
2354 /* Look through the list of possible targets for a target that can
2358 target_follow_fork (int follow_child
, int detach_fork
)
2360 return current_target
.to_follow_fork (¤t_target
,
2361 follow_child
, detach_fork
);
2364 /* Target wrapper for follow exec hook. */
2367 target_follow_exec (struct inferior
*inf
, char *execd_pathname
)
2369 current_target
.to_follow_exec (¤t_target
, inf
, execd_pathname
);
2373 default_mourn_inferior (struct target_ops
*self
)
2375 internal_error (__FILE__
, __LINE__
,
2376 _("could not find a target to follow mourn inferior"));
2380 target_mourn_inferior (ptid_t ptid
)
2382 gdb_assert (ptid_equal (ptid
, inferior_ptid
));
2383 current_target
.to_mourn_inferior (¤t_target
);
2385 /* We no longer need to keep handles on any of the object files.
2386 Make sure to release them to avoid unnecessarily locking any
2387 of them while we're not actually debugging. */
2388 bfd_cache_close_all ();
2391 /* Look for a target which can describe architectural features, starting
2392 from TARGET. If we find one, return its description. */
2394 const struct target_desc
*
2395 target_read_description (struct target_ops
*target
)
2397 return target
->to_read_description (target
);
2400 /* This implements a basic search of memory, reading target memory and
2401 performing the search here (as opposed to performing the search in on the
2402 target side with, for example, gdbserver). */
2405 simple_search_memory (struct target_ops
*ops
,
2406 CORE_ADDR start_addr
, ULONGEST search_space_len
,
2407 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2408 CORE_ADDR
*found_addrp
)
2410 /* NOTE: also defined in find.c testcase. */
2411 #define SEARCH_CHUNK_SIZE 16000
2412 const unsigned chunk_size
= SEARCH_CHUNK_SIZE
;
2413 /* Buffer to hold memory contents for searching. */
2414 gdb_byte
*search_buf
;
2415 unsigned search_buf_size
;
2416 struct cleanup
*old_cleanups
;
2418 search_buf_size
= chunk_size
+ pattern_len
- 1;
2420 /* No point in trying to allocate a buffer larger than the search space. */
2421 if (search_space_len
< search_buf_size
)
2422 search_buf_size
= search_space_len
;
2424 search_buf
= (gdb_byte
*) malloc (search_buf_size
);
2425 if (search_buf
== NULL
)
2426 error (_("Unable to allocate memory to perform the search."));
2427 old_cleanups
= make_cleanup (free_current_contents
, &search_buf
);
2429 /* Prime the search buffer. */
2431 if (target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2432 search_buf
, start_addr
, search_buf_size
) != search_buf_size
)
2434 warning (_("Unable to access %s bytes of target "
2435 "memory at %s, halting search."),
2436 pulongest (search_buf_size
), hex_string (start_addr
));
2437 do_cleanups (old_cleanups
);
2441 /* Perform the search.
2443 The loop is kept simple by allocating [N + pattern-length - 1] bytes.
2444 When we've scanned N bytes we copy the trailing bytes to the start and
2445 read in another N bytes. */
2447 while (search_space_len
>= pattern_len
)
2449 gdb_byte
*found_ptr
;
2450 unsigned nr_search_bytes
2451 = std::min (search_space_len
, (ULONGEST
) search_buf_size
);
2453 found_ptr
= (gdb_byte
*) memmem (search_buf
, nr_search_bytes
,
2454 pattern
, pattern_len
);
2456 if (found_ptr
!= NULL
)
2458 CORE_ADDR found_addr
= start_addr
+ (found_ptr
- search_buf
);
2460 *found_addrp
= found_addr
;
2461 do_cleanups (old_cleanups
);
2465 /* Not found in this chunk, skip to next chunk. */
2467 /* Don't let search_space_len wrap here, it's unsigned. */
2468 if (search_space_len
>= chunk_size
)
2469 search_space_len
-= chunk_size
;
2471 search_space_len
= 0;
2473 if (search_space_len
>= pattern_len
)
2475 unsigned keep_len
= search_buf_size
- chunk_size
;
2476 CORE_ADDR read_addr
= start_addr
+ chunk_size
+ keep_len
;
2479 /* Copy the trailing part of the previous iteration to the front
2480 of the buffer for the next iteration. */
2481 gdb_assert (keep_len
== pattern_len
- 1);
2482 memcpy (search_buf
, search_buf
+ chunk_size
, keep_len
);
2484 nr_to_read
= std::min (search_space_len
- keep_len
,
2485 (ULONGEST
) chunk_size
);
2487 if (target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2488 search_buf
+ keep_len
, read_addr
,
2489 nr_to_read
) != nr_to_read
)
2491 warning (_("Unable to access %s bytes of target "
2492 "memory at %s, halting search."),
2493 plongest (nr_to_read
),
2494 hex_string (read_addr
));
2495 do_cleanups (old_cleanups
);
2499 start_addr
+= chunk_size
;
2505 do_cleanups (old_cleanups
);
2509 /* Default implementation of memory-searching. */
2512 default_search_memory (struct target_ops
*self
,
2513 CORE_ADDR start_addr
, ULONGEST search_space_len
,
2514 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2515 CORE_ADDR
*found_addrp
)
2517 /* Start over from the top of the target stack. */
2518 return simple_search_memory (current_target
.beneath
,
2519 start_addr
, search_space_len
,
2520 pattern
, pattern_len
, found_addrp
);
2523 /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the
2524 sequence of bytes in PATTERN with length PATTERN_LEN.
2526 The result is 1 if found, 0 if not found, and -1 if there was an error
2527 requiring halting of the search (e.g. memory read error).
2528 If the pattern is found the address is recorded in FOUND_ADDRP. */
2531 target_search_memory (CORE_ADDR start_addr
, ULONGEST search_space_len
,
2532 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2533 CORE_ADDR
*found_addrp
)
2535 return current_target
.to_search_memory (¤t_target
, start_addr
,
2537 pattern
, pattern_len
, found_addrp
);
2540 /* Look through the currently pushed targets. If none of them will
2541 be able to restart the currently running process, issue an error
2545 target_require_runnable (void)
2547 struct target_ops
*t
;
2549 for (t
= target_stack
; t
!= NULL
; t
= t
->beneath
)
2551 /* If this target knows how to create a new program, then
2552 assume we will still be able to after killing the current
2553 one. Either killing and mourning will not pop T, or else
2554 find_default_run_target will find it again. */
2555 if (t
->to_create_inferior
!= NULL
)
2558 /* Do not worry about targets at certain strata that can not
2559 create inferiors. Assume they will be pushed again if
2560 necessary, and continue to the process_stratum. */
2561 if (t
->to_stratum
== thread_stratum
2562 || t
->to_stratum
== record_stratum
2563 || t
->to_stratum
== arch_stratum
)
2566 error (_("The \"%s\" target does not support \"run\". "
2567 "Try \"help target\" or \"continue\"."),
2571 /* This function is only called if the target is running. In that
2572 case there should have been a process_stratum target and it
2573 should either know how to create inferiors, or not... */
2574 internal_error (__FILE__
, __LINE__
, _("No targets found"));
2577 /* Whether GDB is allowed to fall back to the default run target for
2578 "run", "attach", etc. when no target is connected yet. */
2579 static int auto_connect_native_target
= 1;
2582 show_auto_connect_native_target (struct ui_file
*file
, int from_tty
,
2583 struct cmd_list_element
*c
, const char *value
)
2585 fprintf_filtered (file
,
2586 _("Whether GDB may automatically connect to the "
2587 "native target is %s.\n"),
2591 /* Look through the list of possible targets for a target that can
2592 execute a run or attach command without any other data. This is
2593 used to locate the default process stratum.
2595 If DO_MESG is not NULL, the result is always valid (error() is
2596 called for errors); else, return NULL on error. */
2598 static struct target_ops
*
2599 find_default_run_target (char *do_mesg
)
2601 struct target_ops
*runable
= NULL
;
2603 if (auto_connect_native_target
)
2605 struct target_ops
*t
;
2609 for (i
= 0; VEC_iterate (target_ops_p
, target_structs
, i
, t
); ++i
)
2611 if (t
->to_can_run
!= delegate_can_run
&& target_can_run (t
))
2622 if (runable
== NULL
)
2625 error (_("Don't know how to %s. Try \"help target\"."), do_mesg
);
2636 find_attach_target (void)
2638 struct target_ops
*t
;
2640 /* If a target on the current stack can attach, use it. */
2641 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2643 if (t
->to_attach
!= NULL
)
2647 /* Otherwise, use the default run target for attaching. */
2649 t
= find_default_run_target ("attach");
2657 find_run_target (void)
2659 struct target_ops
*t
;
2661 /* If a target on the current stack can attach, use it. */
2662 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2664 if (t
->to_create_inferior
!= NULL
)
2668 /* Otherwise, use the default run target. */
2670 t
= find_default_run_target ("run");
2675 /* Implement the "info proc" command. */
2678 target_info_proc (const char *args
, enum info_proc_what what
)
2680 struct target_ops
*t
;
2682 /* If we're already connected to something that can get us OS
2683 related data, use it. Otherwise, try using the native
2685 if (current_target
.to_stratum
>= process_stratum
)
2686 t
= current_target
.beneath
;
2688 t
= find_default_run_target (NULL
);
2690 for (; t
!= NULL
; t
= t
->beneath
)
2692 if (t
->to_info_proc
!= NULL
)
2694 t
->to_info_proc (t
, args
, what
);
2697 fprintf_unfiltered (gdb_stdlog
,
2698 "target_info_proc (\"%s\", %d)\n", args
, what
);
2708 find_default_supports_disable_randomization (struct target_ops
*self
)
2710 struct target_ops
*t
;
2712 t
= find_default_run_target (NULL
);
2713 if (t
&& t
->to_supports_disable_randomization
)
2714 return (t
->to_supports_disable_randomization
) (t
);
2719 target_supports_disable_randomization (void)
2721 struct target_ops
*t
;
2723 for (t
= ¤t_target
; t
!= NULL
; t
= t
->beneath
)
2724 if (t
->to_supports_disable_randomization
)
2725 return t
->to_supports_disable_randomization (t
);
2731 target_get_osdata (const char *type
)
2733 struct target_ops
*t
;
2735 /* If we're already connected to something that can get us OS
2736 related data, use it. Otherwise, try using the native
2738 if (current_target
.to_stratum
>= process_stratum
)
2739 t
= current_target
.beneath
;
2741 t
= find_default_run_target ("get OS data");
2746 return target_read_stralloc (t
, TARGET_OBJECT_OSDATA
, type
);
2749 static struct address_space
*
2750 default_thread_address_space (struct target_ops
*self
, ptid_t ptid
)
2752 struct inferior
*inf
;
2754 /* Fall-back to the "main" address space of the inferior. */
2755 inf
= find_inferior_ptid (ptid
);
2757 if (inf
== NULL
|| inf
->aspace
== NULL
)
2758 internal_error (__FILE__
, __LINE__
,
2759 _("Can't determine the current "
2760 "address space of thread %s\n"),
2761 target_pid_to_str (ptid
));
2766 /* Determine the current address space of thread PTID. */
2768 struct address_space
*
2769 target_thread_address_space (ptid_t ptid
)
2771 struct address_space
*aspace
;
2773 aspace
= current_target
.to_thread_address_space (¤t_target
, ptid
);
2774 gdb_assert (aspace
!= NULL
);
2780 /* Target file operations. */
2782 static struct target_ops
*
2783 default_fileio_target (void)
2785 /* If we're already connected to something that can perform
2786 file I/O, use it. Otherwise, try using the native target. */
2787 if (current_target
.to_stratum
>= process_stratum
)
2788 return current_target
.beneath
;
2790 return find_default_run_target ("file I/O");
2793 /* File handle for target file operations. */
2797 /* The target on which this file is open. */
2798 struct target_ops
*t
;
2800 /* The file descriptor on the target. */
2804 DEF_VEC_O (fileio_fh_t
);
2806 /* Vector of currently open file handles. The value returned by
2807 target_fileio_open and passed as the FD argument to other
2808 target_fileio_* functions is an index into this vector. This
2809 vector's entries are never freed; instead, files are marked as
2810 closed, and the handle becomes available for reuse. */
2811 static VEC (fileio_fh_t
) *fileio_fhandles
;
2813 /* Macro to check whether a fileio_fh_t represents a closed file. */
2814 #define is_closed_fileio_fh(fd) ((fd) < 0)
2816 /* Index into fileio_fhandles of the lowest handle that might be
2817 closed. This permits handle reuse without searching the whole
2818 list each time a new file is opened. */
2819 static int lowest_closed_fd
;
2821 /* Acquire a target fileio file descriptor. */
2824 acquire_fileio_fd (struct target_ops
*t
, int fd
)
2828 gdb_assert (!is_closed_fileio_fh (fd
));
2830 /* Search for closed handles to reuse. */
2832 VEC_iterate (fileio_fh_t
, fileio_fhandles
,
2833 lowest_closed_fd
, fh
);
2835 if (is_closed_fileio_fh (fh
->fd
))
2838 /* Push a new handle if no closed handles were found. */
2839 if (lowest_closed_fd
== VEC_length (fileio_fh_t
, fileio_fhandles
))
2840 fh
= VEC_safe_push (fileio_fh_t
, fileio_fhandles
, NULL
);
2842 /* Fill in the handle. */
2846 /* Return its index, and start the next lookup at
2848 return lowest_closed_fd
++;
2851 /* Release a target fileio file descriptor. */
2854 release_fileio_fd (int fd
, fileio_fh_t
*fh
)
2857 lowest_closed_fd
= std::min (lowest_closed_fd
, fd
);
2860 /* Return a pointer to the fileio_fhandle_t corresponding to FD. */
2862 #define fileio_fd_to_fh(fd) \
2863 VEC_index (fileio_fh_t, fileio_fhandles, (fd))
2865 /* Helper for target_fileio_open and
2866 target_fileio_open_warn_if_slow. */
2869 target_fileio_open_1 (struct inferior
*inf
, const char *filename
,
2870 int flags
, int mode
, int warn_if_slow
,
2873 struct target_ops
*t
;
2875 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
2877 if (t
->to_fileio_open
!= NULL
)
2879 int fd
= t
->to_fileio_open (t
, inf
, filename
, flags
, mode
,
2880 warn_if_slow
, target_errno
);
2885 fd
= acquire_fileio_fd (t
, fd
);
2888 fprintf_unfiltered (gdb_stdlog
,
2889 "target_fileio_open (%d,%s,0x%x,0%o,%d)"
2891 inf
== NULL
? 0 : inf
->num
,
2892 filename
, flags
, mode
,
2894 fd
!= -1 ? 0 : *target_errno
);
2899 *target_errno
= FILEIO_ENOSYS
;
2906 target_fileio_open (struct inferior
*inf
, const char *filename
,
2907 int flags
, int mode
, int *target_errno
)
2909 return target_fileio_open_1 (inf
, filename
, flags
, mode
, 0,
2916 target_fileio_open_warn_if_slow (struct inferior
*inf
,
2917 const char *filename
,
2918 int flags
, int mode
, int *target_errno
)
2920 return target_fileio_open_1 (inf
, filename
, flags
, mode
, 1,
2927 target_fileio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
2928 ULONGEST offset
, int *target_errno
)
2930 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
2933 if (is_closed_fileio_fh (fh
->fd
))
2934 *target_errno
= EBADF
;
2936 ret
= fh
->t
->to_fileio_pwrite (fh
->t
, fh
->fd
, write_buf
,
2937 len
, offset
, target_errno
);
2940 fprintf_unfiltered (gdb_stdlog
,
2941 "target_fileio_pwrite (%d,...,%d,%s) "
2943 fd
, len
, pulongest (offset
),
2944 ret
, ret
!= -1 ? 0 : *target_errno
);
2951 target_fileio_pread (int fd
, gdb_byte
*read_buf
, int len
,
2952 ULONGEST offset
, int *target_errno
)
2954 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
2957 if (is_closed_fileio_fh (fh
->fd
))
2958 *target_errno
= EBADF
;
2960 ret
= fh
->t
->to_fileio_pread (fh
->t
, fh
->fd
, read_buf
,
2961 len
, offset
, target_errno
);
2964 fprintf_unfiltered (gdb_stdlog
,
2965 "target_fileio_pread (%d,...,%d,%s) "
2967 fd
, len
, pulongest (offset
),
2968 ret
, ret
!= -1 ? 0 : *target_errno
);
2975 target_fileio_fstat (int fd
, struct stat
*sb
, int *target_errno
)
2977 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
2980 if (is_closed_fileio_fh (fh
->fd
))
2981 *target_errno
= EBADF
;
2983 ret
= fh
->t
->to_fileio_fstat (fh
->t
, fh
->fd
, sb
, target_errno
);
2986 fprintf_unfiltered (gdb_stdlog
,
2987 "target_fileio_fstat (%d) = %d (%d)\n",
2988 fd
, ret
, ret
!= -1 ? 0 : *target_errno
);
2995 target_fileio_close (int fd
, int *target_errno
)
2997 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
3000 if (is_closed_fileio_fh (fh
->fd
))
3001 *target_errno
= EBADF
;
3004 ret
= fh
->t
->to_fileio_close (fh
->t
, fh
->fd
, target_errno
);
3005 release_fileio_fd (fd
, fh
);
3009 fprintf_unfiltered (gdb_stdlog
,
3010 "target_fileio_close (%d) = %d (%d)\n",
3011 fd
, ret
, ret
!= -1 ? 0 : *target_errno
);
3018 target_fileio_unlink (struct inferior
*inf
, const char *filename
,
3021 struct target_ops
*t
;
3023 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
3025 if (t
->to_fileio_unlink
!= NULL
)
3027 int ret
= t
->to_fileio_unlink (t
, inf
, filename
,
3031 fprintf_unfiltered (gdb_stdlog
,
3032 "target_fileio_unlink (%d,%s)"
3034 inf
== NULL
? 0 : inf
->num
, filename
,
3035 ret
, ret
!= -1 ? 0 : *target_errno
);
3040 *target_errno
= FILEIO_ENOSYS
;
3047 target_fileio_readlink (struct inferior
*inf
, const char *filename
,
3050 struct target_ops
*t
;
3052 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
3054 if (t
->to_fileio_readlink
!= NULL
)
3056 char *ret
= t
->to_fileio_readlink (t
, inf
, filename
,
3060 fprintf_unfiltered (gdb_stdlog
,
3061 "target_fileio_readlink (%d,%s)"
3063 inf
== NULL
? 0 : inf
->num
,
3064 filename
, ret
? ret
: "(nil)",
3065 ret
? 0 : *target_errno
);
3070 *target_errno
= FILEIO_ENOSYS
;
3075 target_fileio_close_cleanup (void *opaque
)
3077 int fd
= *(int *) opaque
;
3080 target_fileio_close (fd
, &target_errno
);
3083 /* Read target file FILENAME, in the filesystem as seen by INF. If
3084 INF is NULL, use the filesystem seen by the debugger (GDB or, for
3085 remote targets, the remote stub). Store the result in *BUF_P and
3086 return the size of the transferred data. PADDING additional bytes
3087 are available in *BUF_P. This is a helper function for
3088 target_fileio_read_alloc; see the declaration of that function for
3089 more information. */
3092 target_fileio_read_alloc_1 (struct inferior
*inf
, const char *filename
,
3093 gdb_byte
**buf_p
, int padding
)
3095 struct cleanup
*close_cleanup
;
3096 size_t buf_alloc
, buf_pos
;
3102 fd
= target_fileio_open (inf
, filename
, FILEIO_O_RDONLY
, 0700,
3107 close_cleanup
= make_cleanup (target_fileio_close_cleanup
, &fd
);
3109 /* Start by reading up to 4K at a time. The target will throttle
3110 this number down if necessary. */
3112 buf
= (gdb_byte
*) xmalloc (buf_alloc
);
3116 n
= target_fileio_pread (fd
, &buf
[buf_pos
],
3117 buf_alloc
- buf_pos
- padding
, buf_pos
,
3121 /* An error occurred. */
3122 do_cleanups (close_cleanup
);
3128 /* Read all there was. */
3129 do_cleanups (close_cleanup
);
3139 /* If the buffer is filling up, expand it. */
3140 if (buf_alloc
< buf_pos
* 2)
3143 buf
= (gdb_byte
*) xrealloc (buf
, buf_alloc
);
3153 target_fileio_read_alloc (struct inferior
*inf
, const char *filename
,
3156 return target_fileio_read_alloc_1 (inf
, filename
, buf_p
, 0);
3162 target_fileio_read_stralloc (struct inferior
*inf
, const char *filename
)
3166 LONGEST i
, transferred
;
3168 transferred
= target_fileio_read_alloc_1 (inf
, filename
, &buffer
, 1);
3169 bufstr
= (char *) buffer
;
3171 if (transferred
< 0)
3174 if (transferred
== 0)
3175 return xstrdup ("");
3177 bufstr
[transferred
] = 0;
3179 /* Check for embedded NUL bytes; but allow trailing NULs. */
3180 for (i
= strlen (bufstr
); i
< transferred
; i
++)
3183 warning (_("target file %s "
3184 "contained unexpected null characters"),
3194 default_region_ok_for_hw_watchpoint (struct target_ops
*self
,
3195 CORE_ADDR addr
, int len
)
3197 return (len
<= gdbarch_ptr_bit (target_gdbarch ()) / TARGET_CHAR_BIT
);
3201 default_watchpoint_addr_within_range (struct target_ops
*target
,
3203 CORE_ADDR start
, int length
)
3205 return addr
>= start
&& addr
< start
+ length
;
3208 static struct gdbarch
*
3209 default_thread_architecture (struct target_ops
*ops
, ptid_t ptid
)
3211 return target_gdbarch ();
3215 return_zero (struct target_ops
*ignore
)
3221 return_zero_has_execution (struct target_ops
*ignore
, ptid_t ignore2
)
3227 * Find the next target down the stack from the specified target.
3231 find_target_beneath (struct target_ops
*t
)
3239 find_target_at (enum strata stratum
)
3241 struct target_ops
*t
;
3243 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3244 if (t
->to_stratum
== stratum
)
3255 target_announce_detach (int from_tty
)
3263 exec_file
= get_exec_file (0);
3264 if (exec_file
== NULL
)
3267 pid
= ptid_get_pid (inferior_ptid
);
3268 printf_unfiltered (_("Detaching from program: %s, %s\n"), exec_file
,
3269 target_pid_to_str (pid_to_ptid (pid
)));
3270 gdb_flush (gdb_stdout
);
3273 /* The inferior process has died. Long live the inferior! */
3276 generic_mourn_inferior (void)
3280 ptid
= inferior_ptid
;
3281 inferior_ptid
= null_ptid
;
3283 /* Mark breakpoints uninserted in case something tries to delete a
3284 breakpoint while we delete the inferior's threads (which would
3285 fail, since the inferior is long gone). */
3286 mark_breakpoints_out ();
3288 if (!ptid_equal (ptid
, null_ptid
))
3290 int pid
= ptid_get_pid (ptid
);
3291 exit_inferior (pid
);
3294 /* Note this wipes step-resume breakpoints, so needs to be done
3295 after exit_inferior, which ends up referencing the step-resume
3296 breakpoints through clear_thread_inferior_resources. */
3297 breakpoint_init_inferior (inf_exited
);
3299 registers_changed ();
3301 reopen_exec_file ();
3302 reinit_frame_cache ();
3304 if (deprecated_detach_hook
)
3305 deprecated_detach_hook ();
3308 /* Convert a normal process ID to a string. Returns the string in a
3312 normal_pid_to_str (ptid_t ptid
)
3314 static char buf
[32];
3316 xsnprintf (buf
, sizeof buf
, "process %d", ptid_get_pid (ptid
));
3321 default_pid_to_str (struct target_ops
*ops
, ptid_t ptid
)
3323 return normal_pid_to_str (ptid
);
3326 /* Error-catcher for target_find_memory_regions. */
3328 dummy_find_memory_regions (struct target_ops
*self
,
3329 find_memory_region_ftype ignore1
, void *ignore2
)
3331 error (_("Command not implemented for this target."));
3335 /* Error-catcher for target_make_corefile_notes. */
3337 dummy_make_corefile_notes (struct target_ops
*self
,
3338 bfd
*ignore1
, int *ignore2
)
3340 error (_("Command not implemented for this target."));
3344 /* Set up the handful of non-empty slots needed by the dummy target
3348 init_dummy_target (void)
3350 dummy_target
.to_shortname
= "None";
3351 dummy_target
.to_longname
= "None";
3352 dummy_target
.to_doc
= "";
3353 dummy_target
.to_supports_disable_randomization
3354 = find_default_supports_disable_randomization
;
3355 dummy_target
.to_stratum
= dummy_stratum
;
3356 dummy_target
.to_has_all_memory
= return_zero
;
3357 dummy_target
.to_has_memory
= return_zero
;
3358 dummy_target
.to_has_stack
= return_zero
;
3359 dummy_target
.to_has_registers
= return_zero
;
3360 dummy_target
.to_has_execution
= return_zero_has_execution
;
3361 dummy_target
.to_magic
= OPS_MAGIC
;
3363 install_dummy_methods (&dummy_target
);
3368 target_close (struct target_ops
*targ
)
3370 gdb_assert (!target_is_pushed (targ
));
3372 if (targ
->to_xclose
!= NULL
)
3373 targ
->to_xclose (targ
);
3374 else if (targ
->to_close
!= NULL
)
3375 targ
->to_close (targ
);
3378 fprintf_unfiltered (gdb_stdlog
, "target_close ()\n");
3382 target_thread_alive (ptid_t ptid
)
3384 return current_target
.to_thread_alive (¤t_target
, ptid
);
3388 target_update_thread_list (void)
3390 current_target
.to_update_thread_list (¤t_target
);
3394 target_stop (ptid_t ptid
)
3398 warning (_("May not interrupt or stop the target, ignoring attempt"));
3402 (*current_target
.to_stop
) (¤t_target
, ptid
);
3406 target_interrupt (ptid_t ptid
)
3410 warning (_("May not interrupt or stop the target, ignoring attempt"));
3414 (*current_target
.to_interrupt
) (¤t_target
, ptid
);
3420 target_pass_ctrlc (void)
3422 (*current_target
.to_pass_ctrlc
) (¤t_target
);
3428 default_target_pass_ctrlc (struct target_ops
*ops
)
3430 target_interrupt (inferior_ptid
);
3433 /* See target/target.h. */
3436 target_stop_and_wait (ptid_t ptid
)
3438 struct target_waitstatus status
;
3439 int was_non_stop
= non_stop
;
3444 memset (&status
, 0, sizeof (status
));
3445 target_wait (ptid
, &status
, 0);
3447 non_stop
= was_non_stop
;
3450 /* See target/target.h. */
3453 target_continue_no_signal (ptid_t ptid
)
3455 target_resume (ptid
, 0, GDB_SIGNAL_0
);
3458 /* See target/target.h. */
3461 target_continue (ptid_t ptid
, enum gdb_signal signal
)
3463 target_resume (ptid
, 0, signal
);
3466 /* Concatenate ELEM to LIST, a comma separate list, and return the
3467 result. The LIST incoming argument is released. */
3470 str_comma_list_concat_elem (char *list
, const char *elem
)
3473 return xstrdup (elem
);
3475 return reconcat (list
, list
, ", ", elem
, (char *) NULL
);
3478 /* Helper for target_options_to_string. If OPT is present in
3479 TARGET_OPTIONS, append the OPT_STR (string version of OPT) in RET.
3480 Returns the new resulting string. OPT is removed from
3484 do_option (int *target_options
, char *ret
,
3485 int opt
, char *opt_str
)
3487 if ((*target_options
& opt
) != 0)
3489 ret
= str_comma_list_concat_elem (ret
, opt_str
);
3490 *target_options
&= ~opt
;
3497 target_options_to_string (int target_options
)
3501 #define DO_TARG_OPTION(OPT) \
3502 ret = do_option (&target_options, ret, OPT, #OPT)
3504 DO_TARG_OPTION (TARGET_WNOHANG
);
3506 if (target_options
!= 0)
3507 ret
= str_comma_list_concat_elem (ret
, "unknown???");
3515 debug_print_register (const char * func
,
3516 struct regcache
*regcache
, int regno
)
3518 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
3520 fprintf_unfiltered (gdb_stdlog
, "%s ", func
);
3521 if (regno
>= 0 && regno
< gdbarch_num_regs (gdbarch
)
3522 && gdbarch_register_name (gdbarch
, regno
) != NULL
3523 && gdbarch_register_name (gdbarch
, regno
)[0] != '\0')
3524 fprintf_unfiltered (gdb_stdlog
, "(%s)",
3525 gdbarch_register_name (gdbarch
, regno
));
3527 fprintf_unfiltered (gdb_stdlog
, "(%d)", regno
);
3528 if (regno
>= 0 && regno
< gdbarch_num_regs (gdbarch
))
3530 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
3531 int i
, size
= register_size (gdbarch
, regno
);
3532 gdb_byte buf
[MAX_REGISTER_SIZE
];
3534 regcache_raw_collect (regcache
, regno
, buf
);
3535 fprintf_unfiltered (gdb_stdlog
, " = ");
3536 for (i
= 0; i
< size
; i
++)
3538 fprintf_unfiltered (gdb_stdlog
, "%02x", buf
[i
]);
3540 if (size
<= sizeof (LONGEST
))
3542 ULONGEST val
= extract_unsigned_integer (buf
, size
, byte_order
);
3544 fprintf_unfiltered (gdb_stdlog
, " %s %s",
3545 core_addr_to_string_nz (val
), plongest (val
));
3548 fprintf_unfiltered (gdb_stdlog
, "\n");
3552 target_fetch_registers (struct regcache
*regcache
, int regno
)
3554 current_target
.to_fetch_registers (¤t_target
, regcache
, regno
);
3556 debug_print_register ("target_fetch_registers", regcache
, regno
);
3560 target_store_registers (struct regcache
*regcache
, int regno
)
3562 if (!may_write_registers
)
3563 error (_("Writing to registers is not allowed (regno %d)"), regno
);
3565 current_target
.to_store_registers (¤t_target
, regcache
, regno
);
3568 debug_print_register ("target_store_registers", regcache
, regno
);
3573 target_core_of_thread (ptid_t ptid
)
3575 return current_target
.to_core_of_thread (¤t_target
, ptid
);
3579 simple_verify_memory (struct target_ops
*ops
,
3580 const gdb_byte
*data
, CORE_ADDR lma
, ULONGEST size
)
3582 LONGEST total_xfered
= 0;
3584 while (total_xfered
< size
)
3586 ULONGEST xfered_len
;
3587 enum target_xfer_status status
;
3589 ULONGEST howmuch
= std::min
<ULONGEST
> (sizeof (buf
), size
- total_xfered
);
3591 status
= target_xfer_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
3592 buf
, NULL
, lma
+ total_xfered
, howmuch
,
3594 if (status
== TARGET_XFER_OK
3595 && memcmp (data
+ total_xfered
, buf
, xfered_len
) == 0)
3597 total_xfered
+= xfered_len
;
3606 /* Default implementation of memory verification. */
3609 default_verify_memory (struct target_ops
*self
,
3610 const gdb_byte
*data
, CORE_ADDR memaddr
, ULONGEST size
)
3612 /* Start over from the top of the target stack. */
3613 return simple_verify_memory (current_target
.beneath
,
3614 data
, memaddr
, size
);
3618 target_verify_memory (const gdb_byte
*data
, CORE_ADDR memaddr
, ULONGEST size
)
3620 return current_target
.to_verify_memory (¤t_target
,
3621 data
, memaddr
, size
);
3624 /* The documentation for this function is in its prototype declaration in
3628 target_insert_mask_watchpoint (CORE_ADDR addr
, CORE_ADDR mask
,
3629 enum target_hw_bp_type rw
)
3631 return current_target
.to_insert_mask_watchpoint (¤t_target
,
3635 /* The documentation for this function is in its prototype declaration in
3639 target_remove_mask_watchpoint (CORE_ADDR addr
, CORE_ADDR mask
,
3640 enum target_hw_bp_type rw
)
3642 return current_target
.to_remove_mask_watchpoint (¤t_target
,
3646 /* The documentation for this function is in its prototype declaration
3650 target_masked_watch_num_registers (CORE_ADDR addr
, CORE_ADDR mask
)
3652 return current_target
.to_masked_watch_num_registers (¤t_target
,
3656 /* The documentation for this function is in its prototype declaration
3660 target_ranged_break_num_registers (void)
3662 return current_target
.to_ranged_break_num_registers (¤t_target
);
3668 target_supports_btrace (enum btrace_format format
)
3670 return current_target
.to_supports_btrace (¤t_target
, format
);
3675 struct btrace_target_info
*
3676 target_enable_btrace (ptid_t ptid
, const struct btrace_config
*conf
)
3678 return current_target
.to_enable_btrace (¤t_target
, ptid
, conf
);
3684 target_disable_btrace (struct btrace_target_info
*btinfo
)
3686 current_target
.to_disable_btrace (¤t_target
, btinfo
);
3692 target_teardown_btrace (struct btrace_target_info
*btinfo
)
3694 current_target
.to_teardown_btrace (¤t_target
, btinfo
);
3700 target_read_btrace (struct btrace_data
*btrace
,
3701 struct btrace_target_info
*btinfo
,
3702 enum btrace_read_type type
)
3704 return current_target
.to_read_btrace (¤t_target
, btrace
, btinfo
, type
);
3709 const struct btrace_config
*
3710 target_btrace_conf (const struct btrace_target_info
*btinfo
)
3712 return current_target
.to_btrace_conf (¤t_target
, btinfo
);
3718 target_stop_recording (void)
3720 current_target
.to_stop_recording (¤t_target
);
3726 target_save_record (const char *filename
)
3728 current_target
.to_save_record (¤t_target
, filename
);
3734 target_supports_delete_record (void)
3736 struct target_ops
*t
;
3738 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3739 if (t
->to_delete_record
!= delegate_delete_record
3740 && t
->to_delete_record
!= tdefault_delete_record
)
3749 target_delete_record (void)
3751 current_target
.to_delete_record (¤t_target
);
3757 target_record_is_replaying (ptid_t ptid
)
3759 return current_target
.to_record_is_replaying (¤t_target
, ptid
);
3765 target_record_will_replay (ptid_t ptid
, int dir
)
3767 return current_target
.to_record_will_replay (¤t_target
, ptid
, dir
);
3773 target_record_stop_replaying (void)
3775 current_target
.to_record_stop_replaying (¤t_target
);
3781 target_goto_record_begin (void)
3783 current_target
.to_goto_record_begin (¤t_target
);
3789 target_goto_record_end (void)
3791 current_target
.to_goto_record_end (¤t_target
);
3797 target_goto_record (ULONGEST insn
)
3799 current_target
.to_goto_record (¤t_target
, insn
);
3805 target_insn_history (int size
, int flags
)
3807 current_target
.to_insn_history (¤t_target
, size
, flags
);
3813 target_insn_history_from (ULONGEST from
, int size
, int flags
)
3815 current_target
.to_insn_history_from (¤t_target
, from
, size
, flags
);
3821 target_insn_history_range (ULONGEST begin
, ULONGEST end
, int flags
)
3823 current_target
.to_insn_history_range (¤t_target
, begin
, end
, flags
);
3829 target_call_history (int size
, int flags
)
3831 current_target
.to_call_history (¤t_target
, size
, flags
);
3837 target_call_history_from (ULONGEST begin
, int size
, int flags
)
3839 current_target
.to_call_history_from (¤t_target
, begin
, size
, flags
);
3845 target_call_history_range (ULONGEST begin
, ULONGEST end
, int flags
)
3847 current_target
.to_call_history_range (¤t_target
, begin
, end
, flags
);
3852 const struct frame_unwind
*
3853 target_get_unwinder (void)
3855 return current_target
.to_get_unwinder (¤t_target
);
3860 const struct frame_unwind
*
3861 target_get_tailcall_unwinder (void)
3863 return current_target
.to_get_tailcall_unwinder (¤t_target
);
3869 target_prepare_to_generate_core (void)
3871 current_target
.to_prepare_to_generate_core (¤t_target
);
3877 target_done_generating_core (void)
3879 current_target
.to_done_generating_core (¤t_target
);
3883 setup_target_debug (void)
3885 memcpy (&debug_target
, ¤t_target
, sizeof debug_target
);
3887 init_debug_target (¤t_target
);
3891 static char targ_desc
[] =
3892 "Names of targets and files being debugged.\nShows the entire \
3893 stack of targets currently in use (including the exec-file,\n\
3894 core-file, and process, if any), as well as the symbol file name.";
3897 default_rcmd (struct target_ops
*self
, const char *command
,
3898 struct ui_file
*output
)
3900 error (_("\"monitor\" command not supported by this target."));
3904 do_monitor_command (char *cmd
,
3907 target_rcmd (cmd
, gdb_stdtarg
);
3910 /* Print the name of each layers of our target stack. */
3913 maintenance_print_target_stack (char *cmd
, int from_tty
)
3915 struct target_ops
*t
;
3917 printf_filtered (_("The current target stack is:\n"));
3919 for (t
= target_stack
; t
!= NULL
; t
= t
->beneath
)
3921 printf_filtered (" - %s (%s)\n", t
->to_shortname
, t
->to_longname
);
3928 target_async (int enable
)
3930 infrun_async (enable
);
3931 current_target
.to_async (¤t_target
, enable
);
3937 target_thread_events (int enable
)
3939 current_target
.to_thread_events (¤t_target
, enable
);
3942 /* Controls if targets can report that they can/are async. This is
3943 just for maintainers to use when debugging gdb. */
3944 int target_async_permitted
= 1;
3946 /* The set command writes to this variable. If the inferior is
3947 executing, target_async_permitted is *not* updated. */
3948 static int target_async_permitted_1
= 1;
3951 maint_set_target_async_command (char *args
, int from_tty
,
3952 struct cmd_list_element
*c
)
3954 if (have_live_inferiors ())
3956 target_async_permitted_1
= target_async_permitted
;
3957 error (_("Cannot change this setting while the inferior is running."));
3960 target_async_permitted
= target_async_permitted_1
;
3964 maint_show_target_async_command (struct ui_file
*file
, int from_tty
,
3965 struct cmd_list_element
*c
,
3968 fprintf_filtered (file
,
3969 _("Controlling the inferior in "
3970 "asynchronous mode is %s.\n"), value
);
3973 /* Return true if the target operates in non-stop mode even with "set
3977 target_always_non_stop_p (void)
3979 return current_target
.to_always_non_stop_p (¤t_target
);
3985 target_is_non_stop_p (void)
3988 || target_non_stop_enabled
== AUTO_BOOLEAN_TRUE
3989 || (target_non_stop_enabled
== AUTO_BOOLEAN_AUTO
3990 && target_always_non_stop_p ()));
3993 /* Controls if targets can report that they always run in non-stop
3994 mode. This is just for maintainers to use when debugging gdb. */
3995 enum auto_boolean target_non_stop_enabled
= AUTO_BOOLEAN_AUTO
;
3997 /* The set command writes to this variable. If the inferior is
3998 executing, target_non_stop_enabled is *not* updated. */
3999 static enum auto_boolean target_non_stop_enabled_1
= AUTO_BOOLEAN_AUTO
;
4001 /* Implementation of "maint set target-non-stop". */
4004 maint_set_target_non_stop_command (char *args
, int from_tty
,
4005 struct cmd_list_element
*c
)
4007 if (have_live_inferiors ())
4009 target_non_stop_enabled_1
= target_non_stop_enabled
;
4010 error (_("Cannot change this setting while the inferior is running."));
4013 target_non_stop_enabled
= target_non_stop_enabled_1
;
4016 /* Implementation of "maint show target-non-stop". */
4019 maint_show_target_non_stop_command (struct ui_file
*file
, int from_tty
,
4020 struct cmd_list_element
*c
,
4023 if (target_non_stop_enabled
== AUTO_BOOLEAN_AUTO
)
4024 fprintf_filtered (file
,
4025 _("Whether the target is always in non-stop mode "
4026 "is %s (currently %s).\n"), value
,
4027 target_always_non_stop_p () ? "on" : "off");
4029 fprintf_filtered (file
,
4030 _("Whether the target is always in non-stop mode "
4031 "is %s.\n"), value
);
4034 /* Temporary copies of permission settings. */
4036 static int may_write_registers_1
= 1;
4037 static int may_write_memory_1
= 1;
4038 static int may_insert_breakpoints_1
= 1;
4039 static int may_insert_tracepoints_1
= 1;
4040 static int may_insert_fast_tracepoints_1
= 1;
4041 static int may_stop_1
= 1;
4043 /* Make the user-set values match the real values again. */
4046 update_target_permissions (void)
4048 may_write_registers_1
= may_write_registers
;
4049 may_write_memory_1
= may_write_memory
;
4050 may_insert_breakpoints_1
= may_insert_breakpoints
;
4051 may_insert_tracepoints_1
= may_insert_tracepoints
;
4052 may_insert_fast_tracepoints_1
= may_insert_fast_tracepoints
;
4053 may_stop_1
= may_stop
;
4056 /* The one function handles (most of) the permission flags in the same
4060 set_target_permissions (char *args
, int from_tty
,
4061 struct cmd_list_element
*c
)
4063 if (target_has_execution
)
4065 update_target_permissions ();
4066 error (_("Cannot change this setting while the inferior is running."));
4069 /* Make the real values match the user-changed values. */
4070 may_write_registers
= may_write_registers_1
;
4071 may_insert_breakpoints
= may_insert_breakpoints_1
;
4072 may_insert_tracepoints
= may_insert_tracepoints_1
;
4073 may_insert_fast_tracepoints
= may_insert_fast_tracepoints_1
;
4074 may_stop
= may_stop_1
;
4075 update_observer_mode ();
4078 /* Set memory write permission independently of observer mode. */
4081 set_write_memory_permission (char *args
, int from_tty
,
4082 struct cmd_list_element
*c
)
4084 /* Make the real values match the user-changed values. */
4085 may_write_memory
= may_write_memory_1
;
4086 update_observer_mode ();
4091 initialize_targets (void)
4093 init_dummy_target ();
4094 push_target (&dummy_target
);
4096 add_info ("target", target_info
, targ_desc
);
4097 add_info ("files", target_info
, targ_desc
);
4099 add_setshow_zuinteger_cmd ("target", class_maintenance
, &targetdebug
, _("\
4100 Set target debugging."), _("\
4101 Show target debugging."), _("\
4102 When non-zero, target debugging is enabled. Higher numbers are more\n\
4106 &setdebuglist
, &showdebuglist
);
4108 add_setshow_boolean_cmd ("trust-readonly-sections", class_support
,
4109 &trust_readonly
, _("\
4110 Set mode for reading from readonly sections."), _("\
4111 Show mode for reading from readonly sections."), _("\
4112 When this mode is on, memory reads from readonly sections (such as .text)\n\
4113 will be read from the object file instead of from the target. This will\n\
4114 result in significant performance improvement for remote targets."),
4116 show_trust_readonly
,
4117 &setlist
, &showlist
);
4119 add_com ("monitor", class_obscure
, do_monitor_command
,
4120 _("Send a command to the remote monitor (remote targets only)."));
4122 add_cmd ("target-stack", class_maintenance
, maintenance_print_target_stack
,
4123 _("Print the name of each layer of the internal target stack."),
4124 &maintenanceprintlist
);
4126 add_setshow_boolean_cmd ("target-async", no_class
,
4127 &target_async_permitted_1
, _("\
4128 Set whether gdb controls the inferior in asynchronous mode."), _("\
4129 Show whether gdb controls the inferior in asynchronous mode."), _("\
4130 Tells gdb whether to control the inferior in asynchronous mode."),
4131 maint_set_target_async_command
,
4132 maint_show_target_async_command
,
4133 &maintenance_set_cmdlist
,
4134 &maintenance_show_cmdlist
);
4136 add_setshow_auto_boolean_cmd ("target-non-stop", no_class
,
4137 &target_non_stop_enabled_1
, _("\
4138 Set whether gdb always controls the inferior in non-stop mode."), _("\
4139 Show whether gdb always controls the inferior in non-stop mode."), _("\
4140 Tells gdb whether to control the inferior in non-stop mode."),
4141 maint_set_target_non_stop_command
,
4142 maint_show_target_non_stop_command
,
4143 &maintenance_set_cmdlist
,
4144 &maintenance_show_cmdlist
);
4146 add_setshow_boolean_cmd ("may-write-registers", class_support
,
4147 &may_write_registers_1
, _("\
4148 Set permission to write into registers."), _("\
4149 Show permission to write into registers."), _("\
4150 When this permission is on, GDB may write into the target's registers.\n\
4151 Otherwise, any sort of write attempt will result in an error."),
4152 set_target_permissions
, NULL
,
4153 &setlist
, &showlist
);
4155 add_setshow_boolean_cmd ("may-write-memory", class_support
,
4156 &may_write_memory_1
, _("\
4157 Set permission to write into target memory."), _("\
4158 Show permission to write into target memory."), _("\
4159 When this permission is on, GDB may write into the target's memory.\n\
4160 Otherwise, any sort of write attempt will result in an error."),
4161 set_write_memory_permission
, NULL
,
4162 &setlist
, &showlist
);
4164 add_setshow_boolean_cmd ("may-insert-breakpoints", class_support
,
4165 &may_insert_breakpoints_1
, _("\
4166 Set permission to insert breakpoints in the target."), _("\
4167 Show permission to insert breakpoints in the target."), _("\
4168 When this permission is on, GDB may insert breakpoints in the program.\n\
4169 Otherwise, any sort of insertion attempt will result in an error."),
4170 set_target_permissions
, NULL
,
4171 &setlist
, &showlist
);
4173 add_setshow_boolean_cmd ("may-insert-tracepoints", class_support
,
4174 &may_insert_tracepoints_1
, _("\
4175 Set permission to insert tracepoints in the target."), _("\
4176 Show permission to insert tracepoints in the target."), _("\
4177 When this permission is on, GDB may insert tracepoints in the program.\n\
4178 Otherwise, any sort of insertion attempt will result in an error."),
4179 set_target_permissions
, NULL
,
4180 &setlist
, &showlist
);
4182 add_setshow_boolean_cmd ("may-insert-fast-tracepoints", class_support
,
4183 &may_insert_fast_tracepoints_1
, _("\
4184 Set permission to insert fast tracepoints in the target."), _("\
4185 Show permission to insert fast tracepoints in the target."), _("\
4186 When this permission is on, GDB may insert fast tracepoints.\n\
4187 Otherwise, any sort of insertion attempt will result in an error."),
4188 set_target_permissions
, NULL
,
4189 &setlist
, &showlist
);
4191 add_setshow_boolean_cmd ("may-interrupt", class_support
,
4193 Set permission to interrupt or signal the target."), _("\
4194 Show permission to interrupt or signal the target."), _("\
4195 When this permission is on, GDB may interrupt/stop the target's execution.\n\
4196 Otherwise, any attempt to interrupt or stop will be ignored."),
4197 set_target_permissions
, NULL
,
4198 &setlist
, &showlist
);
4200 add_setshow_boolean_cmd ("auto-connect-native-target", class_support
,
4201 &auto_connect_native_target
, _("\
4202 Set whether GDB may automatically connect to the native target."), _("\
4203 Show whether GDB may automatically connect to the native target."), _("\
4204 When on, and GDB is not connected to a target yet, GDB\n\
4205 attempts \"run\" and other commands with the native target."),
4206 NULL
, show_auto_connect_native_target
,
4207 &setlist
, &showlist
);