1 /* Select target systems and architectures at runtime for GDB.
3 Copyright (C) 1990-2018 Free Software Foundation, Inc.
5 Contributed by Cygnus Support.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
24 #include "target-dcache.h"
36 #include "target-descriptions.h"
37 #include "gdbthread.h"
40 #include "inline-frame.h"
41 #include "tracepoint.h"
42 #include "gdb/fileio.h"
45 #include "target-debug.h"
47 #include "event-top.h"
49 #include "byte-vector.h"
51 static void generic_tls_error (void) ATTRIBUTE_NORETURN
;
53 static void default_terminal_info (struct target_ops
*, const char *, int);
55 static int default_watchpoint_addr_within_range (struct target_ops
*,
56 CORE_ADDR
, CORE_ADDR
, int);
58 static int default_region_ok_for_hw_watchpoint (struct target_ops
*,
61 static void default_rcmd (struct target_ops
*, const char *, struct ui_file
*);
63 static ptid_t
default_get_ada_task_ptid (struct target_ops
*self
,
66 static int default_follow_fork (struct target_ops
*self
, int follow_child
,
69 static void default_mourn_inferior (struct target_ops
*self
);
71 static int default_search_memory (struct target_ops
*ops
,
73 ULONGEST search_space_len
,
74 const gdb_byte
*pattern
,
76 CORE_ADDR
*found_addrp
);
78 static int default_verify_memory (struct target_ops
*self
,
80 CORE_ADDR memaddr
, ULONGEST size
);
82 static struct address_space
*default_thread_address_space
83 (struct target_ops
*self
, ptid_t ptid
);
85 static void tcomplain (void) ATTRIBUTE_NORETURN
;
87 static int return_zero (struct target_ops
*);
89 static int return_zero_has_execution (struct target_ops
*, ptid_t
);
91 static struct target_ops
*find_default_run_target (const char *);
93 static struct gdbarch
*default_thread_architecture (struct target_ops
*ops
,
96 static int dummy_find_memory_regions (struct target_ops
*self
,
97 find_memory_region_ftype ignore1
,
100 static char *dummy_make_corefile_notes (struct target_ops
*self
,
101 bfd
*ignore1
, int *ignore2
);
103 static const char *default_pid_to_str (struct target_ops
*ops
, ptid_t ptid
);
105 static enum exec_direction_kind default_execution_direction
106 (struct target_ops
*self
);
108 static struct target_ops debug_target
;
110 #include "target-delegates.c"
112 static void init_dummy_target (void);
114 static void update_current_target (void);
116 /* Vector of existing target structures. */
117 typedef struct target_ops
*target_ops_p
;
118 DEF_VEC_P (target_ops_p
);
119 static VEC (target_ops_p
) *target_structs
;
121 /* The initial current target, so that there is always a semi-valid
124 static struct target_ops dummy_target
;
126 /* Top of target stack. */
128 static struct target_ops
*target_stack
;
130 /* The target structure we are currently using to talk to a process
131 or file or whatever "inferior" we have. */
133 struct target_ops current_target
;
135 /* Command list for target. */
137 static struct cmd_list_element
*targetlist
= NULL
;
139 /* Nonzero if we should trust readonly sections from the
140 executable when reading memory. */
142 static int trust_readonly
= 0;
144 /* Nonzero if we should show true memory content including
145 memory breakpoint inserted by gdb. */
147 static int show_memory_breakpoints
= 0;
149 /* These globals control whether GDB attempts to perform these
150 operations; they are useful for targets that need to prevent
151 inadvertant disruption, such as in non-stop mode. */
153 int may_write_registers
= 1;
155 int may_write_memory
= 1;
157 int may_insert_breakpoints
= 1;
159 int may_insert_tracepoints
= 1;
161 int may_insert_fast_tracepoints
= 1;
165 /* Non-zero if we want to see trace of target level stuff. */
167 static unsigned int targetdebug
= 0;
170 set_targetdebug (const char *args
, int from_tty
, struct cmd_list_element
*c
)
172 update_current_target ();
176 show_targetdebug (struct ui_file
*file
, int from_tty
,
177 struct cmd_list_element
*c
, const char *value
)
179 fprintf_filtered (file
, _("Target debugging is %s.\n"), value
);
182 static void setup_target_debug (void);
184 /* The user just typed 'target' without the name of a target. */
187 target_command (const char *arg
, int from_tty
)
189 fputs_filtered ("Argument required (target name). Try `help target'\n",
193 /* Default target_has_* methods for process_stratum targets. */
196 default_child_has_all_memory (struct target_ops
*ops
)
198 /* If no inferior selected, then we can't read memory here. */
199 if (ptid_equal (inferior_ptid
, null_ptid
))
206 default_child_has_memory (struct target_ops
*ops
)
208 /* If no inferior selected, then we can't read memory here. */
209 if (ptid_equal (inferior_ptid
, null_ptid
))
216 default_child_has_stack (struct target_ops
*ops
)
218 /* If no inferior selected, there's no stack. */
219 if (ptid_equal (inferior_ptid
, null_ptid
))
226 default_child_has_registers (struct target_ops
*ops
)
228 /* Can't read registers from no inferior. */
229 if (ptid_equal (inferior_ptid
, null_ptid
))
236 default_child_has_execution (struct target_ops
*ops
, ptid_t the_ptid
)
238 /* If there's no thread selected, then we can't make it run through
240 if (ptid_equal (the_ptid
, null_ptid
))
248 target_has_all_memory_1 (void)
250 struct target_ops
*t
;
252 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
253 if (t
->to_has_all_memory (t
))
260 target_has_memory_1 (void)
262 struct target_ops
*t
;
264 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
265 if (t
->to_has_memory (t
))
272 target_has_stack_1 (void)
274 struct target_ops
*t
;
276 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
277 if (t
->to_has_stack (t
))
284 target_has_registers_1 (void)
286 struct target_ops
*t
;
288 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
289 if (t
->to_has_registers (t
))
296 target_has_execution_1 (ptid_t the_ptid
)
298 struct target_ops
*t
;
300 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
301 if (t
->to_has_execution (t
, the_ptid
))
308 target_has_execution_current (void)
310 return target_has_execution_1 (inferior_ptid
);
313 /* Complete initialization of T. This ensures that various fields in
314 T are set, if needed by the target implementation. */
317 complete_target_initialization (struct target_ops
*t
)
319 /* Provide default values for all "must have" methods. */
321 if (t
->to_has_all_memory
== NULL
)
322 t
->to_has_all_memory
= return_zero
;
324 if (t
->to_has_memory
== NULL
)
325 t
->to_has_memory
= return_zero
;
327 if (t
->to_has_stack
== NULL
)
328 t
->to_has_stack
= return_zero
;
330 if (t
->to_has_registers
== NULL
)
331 t
->to_has_registers
= return_zero
;
333 if (t
->to_has_execution
== NULL
)
334 t
->to_has_execution
= return_zero_has_execution
;
336 /* These methods can be called on an unpushed target and so require
337 a default implementation if the target might plausibly be the
338 default run target. */
339 gdb_assert (t
->to_can_run
== NULL
|| (t
->to_can_async_p
!= NULL
340 && t
->to_supports_non_stop
!= NULL
));
342 install_delegators (t
);
345 /* This is used to implement the various target commands. */
348 open_target (const char *args
, int from_tty
, struct cmd_list_element
*command
)
350 struct target_ops
*ops
= (struct target_ops
*) get_cmd_context (command
);
353 fprintf_unfiltered (gdb_stdlog
, "-> %s->to_open (...)\n",
356 ops
->to_open (args
, from_tty
);
359 fprintf_unfiltered (gdb_stdlog
, "<- %s->to_open (%s, %d)\n",
360 ops
->to_shortname
, args
, from_tty
);
363 /* Add possible target architecture T to the list and add a new
364 command 'target T->to_shortname'. Set COMPLETER as the command's
365 completer if not NULL. */
368 add_target_with_completer (struct target_ops
*t
,
369 completer_ftype
*completer
)
371 struct cmd_list_element
*c
;
373 complete_target_initialization (t
);
375 VEC_safe_push (target_ops_p
, target_structs
, t
);
377 if (targetlist
== NULL
)
378 add_prefix_cmd ("target", class_run
, target_command
, _("\
379 Connect to a target machine or process.\n\
380 The first argument is the type or protocol of the target machine.\n\
381 Remaining arguments are interpreted by the target protocol. For more\n\
382 information on the arguments for a particular protocol, type\n\
383 `help target ' followed by the protocol name."),
384 &targetlist
, "target ", 0, &cmdlist
);
385 c
= add_cmd (t
->to_shortname
, no_class
, t
->to_doc
, &targetlist
);
386 set_cmd_sfunc (c
, open_target
);
387 set_cmd_context (c
, t
);
388 if (completer
!= NULL
)
389 set_cmd_completer (c
, completer
);
392 /* Add a possible target architecture to the list. */
395 add_target (struct target_ops
*t
)
397 add_target_with_completer (t
, NULL
);
403 add_deprecated_target_alias (struct target_ops
*t
, const char *alias
)
405 struct cmd_list_element
*c
;
408 /* If we use add_alias_cmd, here, we do not get the deprecated warning,
410 c
= add_cmd (alias
, no_class
, t
->to_doc
, &targetlist
);
411 set_cmd_sfunc (c
, open_target
);
412 set_cmd_context (c
, t
);
413 alt
= xstrprintf ("target %s", t
->to_shortname
);
414 deprecate_cmd (c
, alt
);
422 current_target
.to_kill (¤t_target
);
426 target_load (const char *arg
, int from_tty
)
428 target_dcache_invalidate ();
429 (*current_target
.to_load
) (¤t_target
, arg
, from_tty
);
434 enum target_terminal::terminal_state
target_terminal::terminal_state
435 = target_terminal::terminal_is_ours
;
437 /* See target/target.h. */
440 target_terminal::init (void)
442 (*current_target
.to_terminal_init
) (¤t_target
);
444 terminal_state
= terminal_is_ours
;
447 /* See target/target.h. */
450 target_terminal::inferior (void)
452 struct ui
*ui
= current_ui
;
454 /* A background resume (``run&'') should leave GDB in control of the
456 if (ui
->prompt_state
!= PROMPT_BLOCKED
)
459 /* Since we always run the inferior in the main console (unless "set
460 inferior-tty" is in effect), when some UI other than the main one
461 calls target_terminal::inferior, then we leave the main UI's
462 terminal settings as is. */
466 if (terminal_state
== terminal_is_inferior
)
469 /* If GDB is resuming the inferior in the foreground, install
470 inferior's terminal modes. */
471 (*current_target
.to_terminal_inferior
) (¤t_target
);
472 terminal_state
= terminal_is_inferior
;
474 /* If the user hit C-c before, pretend that it was hit right
476 if (check_quit_flag ())
477 target_pass_ctrlc ();
480 /* See target/target.h. */
483 target_terminal::ours ()
485 struct ui
*ui
= current_ui
;
487 /* See target_terminal::inferior. */
491 if (terminal_state
== terminal_is_ours
)
494 (*current_target
.to_terminal_ours
) (¤t_target
);
495 terminal_state
= terminal_is_ours
;
498 /* See target/target.h. */
501 target_terminal::ours_for_output ()
503 struct ui
*ui
= current_ui
;
505 /* See target_terminal::inferior. */
509 if (terminal_state
!= terminal_is_inferior
)
511 (*current_target
.to_terminal_ours_for_output
) (¤t_target
);
512 terminal_state
= terminal_is_ours_for_output
;
515 /* See target/target.h. */
518 target_terminal::info (const char *arg
, int from_tty
)
520 (*current_target
.to_terminal_info
) (¤t_target
, arg
, from_tty
);
526 target_supports_terminal_ours (void)
528 struct target_ops
*t
;
530 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
532 if (t
->to_terminal_ours
!= delegate_terminal_ours
533 && t
->to_terminal_ours
!= tdefault_terminal_ours
)
543 error (_("You can't do that when your target is `%s'"),
544 current_target
.to_shortname
);
550 error (_("You can't do that without a process to debug."));
554 default_terminal_info (struct target_ops
*self
, const char *args
, int from_tty
)
556 printf_unfiltered (_("No saved terminal information.\n"));
559 /* A default implementation for the to_get_ada_task_ptid target method.
561 This function builds the PTID by using both LWP and TID as part of
562 the PTID lwp and tid elements. The pid used is the pid of the
566 default_get_ada_task_ptid (struct target_ops
*self
, long lwp
, long tid
)
568 return ptid_build (ptid_get_pid (inferior_ptid
), lwp
, tid
);
571 static enum exec_direction_kind
572 default_execution_direction (struct target_ops
*self
)
574 if (!target_can_execute_reverse
)
576 else if (!target_can_async_p ())
579 gdb_assert_not_reached ("\
580 to_execution_direction must be implemented for reverse async");
583 /* Go through the target stack from top to bottom, copying over zero
584 entries in current_target, then filling in still empty entries. In
585 effect, we are doing class inheritance through the pushed target
588 NOTE: cagney/2003-10-17: The problem with this inheritance, as it
589 is currently implemented, is that it discards any knowledge of
590 which target an inherited method originally belonged to.
591 Consequently, new new target methods should instead explicitly and
592 locally search the target stack for the target that can handle the
596 update_current_target (void)
598 struct target_ops
*t
;
600 /* First, reset current's contents. */
601 memset (¤t_target
, 0, sizeof (current_target
));
603 /* Install the delegators. */
604 install_delegators (¤t_target
);
606 current_target
.to_stratum
= target_stack
->to_stratum
;
608 #define INHERIT(FIELD, TARGET) \
609 if (!current_target.FIELD) \
610 current_target.FIELD = (TARGET)->FIELD
612 /* Do not add any new INHERITs here. Instead, use the delegation
613 mechanism provided by make-target-delegates. */
614 for (t
= target_stack
; t
; t
= t
->beneath
)
616 INHERIT (to_shortname
, t
);
617 INHERIT (to_longname
, t
);
618 INHERIT (to_attach_no_wait
, t
);
619 INHERIT (to_have_steppable_watchpoint
, t
);
620 INHERIT (to_have_continuable_watchpoint
, t
);
621 INHERIT (to_has_thread_control
, t
);
625 /* Finally, position the target-stack beneath the squashed
626 "current_target". That way code looking for a non-inherited
627 target method can quickly and simply find it. */
628 current_target
.beneath
= target_stack
;
631 setup_target_debug ();
634 /* Push a new target type into the stack of the existing target accessors,
635 possibly superseding some of the existing accessors.
637 Rather than allow an empty stack, we always have the dummy target at
638 the bottom stratum, so we can call the function vectors without
642 push_target (struct target_ops
*t
)
644 struct target_ops
**cur
;
646 /* Check magic number. If wrong, it probably means someone changed
647 the struct definition, but not all the places that initialize one. */
648 if (t
->to_magic
!= OPS_MAGIC
)
650 fprintf_unfiltered (gdb_stderr
,
651 "Magic number of %s target struct wrong\n",
653 internal_error (__FILE__
, __LINE__
,
654 _("failed internal consistency check"));
657 /* Find the proper stratum to install this target in. */
658 for (cur
= &target_stack
; (*cur
) != NULL
; cur
= &(*cur
)->beneath
)
660 if ((int) (t
->to_stratum
) >= (int) (*cur
)->to_stratum
)
664 /* If there's already targets at this stratum, remove them. */
665 /* FIXME: cagney/2003-10-15: I think this should be popping all
666 targets to CUR, and not just those at this stratum level. */
667 while ((*cur
) != NULL
&& t
->to_stratum
== (*cur
)->to_stratum
)
669 /* There's already something at this stratum level. Close it,
670 and un-hook it from the stack. */
671 struct target_ops
*tmp
= (*cur
);
673 (*cur
) = (*cur
)->beneath
;
678 /* We have removed all targets in our stratum, now add the new one. */
682 update_current_target ();
685 /* Remove a target_ops vector from the stack, wherever it may be.
686 Return how many times it was removed (0 or 1). */
689 unpush_target (struct target_ops
*t
)
691 struct target_ops
**cur
;
692 struct target_ops
*tmp
;
694 if (t
->to_stratum
== dummy_stratum
)
695 internal_error (__FILE__
, __LINE__
,
696 _("Attempt to unpush the dummy target"));
698 /* Look for the specified target. Note that we assume that a target
699 can only occur once in the target stack. */
701 for (cur
= &target_stack
; (*cur
) != NULL
; cur
= &(*cur
)->beneath
)
707 /* If we don't find target_ops, quit. Only open targets should be
712 /* Unchain the target. */
714 (*cur
) = (*cur
)->beneath
;
717 update_current_target ();
719 /* Finally close the target. Note we do this after unchaining, so
720 any target method calls from within the target_close
721 implementation don't end up in T anymore. */
727 /* Unpush TARGET and assert that it worked. */
730 unpush_target_and_assert (struct target_ops
*target
)
732 if (!unpush_target (target
))
734 fprintf_unfiltered (gdb_stderr
,
735 "pop_all_targets couldn't find target %s\n",
736 target
->to_shortname
);
737 internal_error (__FILE__
, __LINE__
,
738 _("failed internal consistency check"));
743 pop_all_targets_above (enum strata above_stratum
)
745 while ((int) (current_target
.to_stratum
) > (int) above_stratum
)
746 unpush_target_and_assert (target_stack
);
752 pop_all_targets_at_and_above (enum strata stratum
)
754 while ((int) (current_target
.to_stratum
) >= (int) stratum
)
755 unpush_target_and_assert (target_stack
);
759 pop_all_targets (void)
761 pop_all_targets_above (dummy_stratum
);
764 /* Return 1 if T is now pushed in the target stack. Return 0 otherwise. */
767 target_is_pushed (struct target_ops
*t
)
769 struct target_ops
*cur
;
771 /* Check magic number. If wrong, it probably means someone changed
772 the struct definition, but not all the places that initialize one. */
773 if (t
->to_magic
!= OPS_MAGIC
)
775 fprintf_unfiltered (gdb_stderr
,
776 "Magic number of %s target struct wrong\n",
778 internal_error (__FILE__
, __LINE__
,
779 _("failed internal consistency check"));
782 for (cur
= target_stack
; cur
!= NULL
; cur
= cur
->beneath
)
789 /* Default implementation of to_get_thread_local_address. */
792 generic_tls_error (void)
794 throw_error (TLS_GENERIC_ERROR
,
795 _("Cannot find thread-local variables on this target"));
798 /* Using the objfile specified in OBJFILE, find the address for the
799 current thread's thread-local storage with offset OFFSET. */
801 target_translate_tls_address (struct objfile
*objfile
, CORE_ADDR offset
)
803 volatile CORE_ADDR addr
= 0;
804 struct target_ops
*target
= ¤t_target
;
806 if (gdbarch_fetch_tls_load_module_address_p (target_gdbarch ()))
808 ptid_t ptid
= inferior_ptid
;
814 /* Fetch the load module address for this objfile. */
815 lm_addr
= gdbarch_fetch_tls_load_module_address (target_gdbarch (),
818 addr
= target
->to_get_thread_local_address (target
, ptid
,
821 /* If an error occurred, print TLS related messages here. Otherwise,
822 throw the error to some higher catcher. */
823 CATCH (ex
, RETURN_MASK_ALL
)
825 int objfile_is_library
= (objfile
->flags
& OBJF_SHARED
);
829 case TLS_NO_LIBRARY_SUPPORT_ERROR
:
830 error (_("Cannot find thread-local variables "
831 "in this thread library."));
833 case TLS_LOAD_MODULE_NOT_FOUND_ERROR
:
834 if (objfile_is_library
)
835 error (_("Cannot find shared library `%s' in dynamic"
836 " linker's load module list"), objfile_name (objfile
));
838 error (_("Cannot find executable file `%s' in dynamic"
839 " linker's load module list"), objfile_name (objfile
));
841 case TLS_NOT_ALLOCATED_YET_ERROR
:
842 if (objfile_is_library
)
843 error (_("The inferior has not yet allocated storage for"
844 " thread-local variables in\n"
845 "the shared library `%s'\n"
847 objfile_name (objfile
), target_pid_to_str (ptid
));
849 error (_("The inferior has not yet allocated storage for"
850 " thread-local variables in\n"
851 "the executable `%s'\n"
853 objfile_name (objfile
), target_pid_to_str (ptid
));
855 case TLS_GENERIC_ERROR
:
856 if (objfile_is_library
)
857 error (_("Cannot find thread-local storage for %s, "
858 "shared library %s:\n%s"),
859 target_pid_to_str (ptid
),
860 objfile_name (objfile
), ex
.message
);
862 error (_("Cannot find thread-local storage for %s, "
863 "executable file %s:\n%s"),
864 target_pid_to_str (ptid
),
865 objfile_name (objfile
), ex
.message
);
868 throw_exception (ex
);
874 /* It wouldn't be wrong here to try a gdbarch method, too; finding
875 TLS is an ABI-specific thing. But we don't do that yet. */
877 error (_("Cannot find thread-local variables on this target"));
883 target_xfer_status_to_string (enum target_xfer_status status
)
885 #define CASE(X) case X: return #X
888 CASE(TARGET_XFER_E_IO
);
889 CASE(TARGET_XFER_UNAVAILABLE
);
898 #define MIN(A, B) (((A) <= (B)) ? (A) : (B))
900 /* target_read_string -- read a null terminated string, up to LEN bytes,
901 from MEMADDR in target. Set *ERRNOP to the errno code, or 0 if successful.
902 Set *STRING to a pointer to malloc'd memory containing the data; the caller
903 is responsible for freeing it. Return the number of bytes successfully
907 target_read_string (CORE_ADDR memaddr
, char **string
, int len
, int *errnop
)
913 int buffer_allocated
;
915 unsigned int nbytes_read
= 0;
919 /* Small for testing. */
920 buffer_allocated
= 4;
921 buffer
= (char *) xmalloc (buffer_allocated
);
926 tlen
= MIN (len
, 4 - (memaddr
& 3));
927 offset
= memaddr
& 3;
929 errcode
= target_read_memory (memaddr
& ~3, buf
, sizeof buf
);
932 /* The transfer request might have crossed the boundary to an
933 unallocated region of memory. Retry the transfer, requesting
937 errcode
= target_read_memory (memaddr
, buf
, 1);
942 if (bufptr
- buffer
+ tlen
> buffer_allocated
)
946 bytes
= bufptr
- buffer
;
947 buffer_allocated
*= 2;
948 buffer
= (char *) xrealloc (buffer
, buffer_allocated
);
949 bufptr
= buffer
+ bytes
;
952 for (i
= 0; i
< tlen
; i
++)
954 *bufptr
++ = buf
[i
+ offset
];
955 if (buf
[i
+ offset
] == '\000')
957 nbytes_read
+= i
+ 1;
973 struct target_section_table
*
974 target_get_section_table (struct target_ops
*target
)
976 return (*target
->to_get_section_table
) (target
);
979 /* Find a section containing ADDR. */
981 struct target_section
*
982 target_section_by_addr (struct target_ops
*target
, CORE_ADDR addr
)
984 struct target_section_table
*table
= target_get_section_table (target
);
985 struct target_section
*secp
;
990 for (secp
= table
->sections
; secp
< table
->sections_end
; secp
++)
992 if (addr
>= secp
->addr
&& addr
< secp
->endaddr
)
999 /* Helper for the memory xfer routines. Checks the attributes of the
1000 memory region of MEMADDR against the read or write being attempted.
1001 If the access is permitted returns true, otherwise returns false.
1002 REGION_P is an optional output parameter. If not-NULL, it is
1003 filled with a pointer to the memory region of MEMADDR. REG_LEN
1004 returns LEN trimmed to the end of the region. This is how much the
1005 caller can continue requesting, if the access is permitted. A
1006 single xfer request must not straddle memory region boundaries. */
1009 memory_xfer_check_region (gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1010 ULONGEST memaddr
, ULONGEST len
, ULONGEST
*reg_len
,
1011 struct mem_region
**region_p
)
1013 struct mem_region
*region
;
1015 region
= lookup_mem_region (memaddr
);
1017 if (region_p
!= NULL
)
1020 switch (region
->attrib
.mode
)
1023 if (writebuf
!= NULL
)
1028 if (readbuf
!= NULL
)
1033 /* We only support writing to flash during "load" for now. */
1034 if (writebuf
!= NULL
)
1035 error (_("Writing to flash memory forbidden in this context"));
1042 /* region->hi == 0 means there's no upper bound. */
1043 if (memaddr
+ len
< region
->hi
|| region
->hi
== 0)
1046 *reg_len
= region
->hi
- memaddr
;
1051 /* Read memory from more than one valid target. A core file, for
1052 instance, could have some of memory but delegate other bits to
1053 the target below it. So, we must manually try all targets. */
1055 enum target_xfer_status
1056 raw_memory_xfer_partial (struct target_ops
*ops
, gdb_byte
*readbuf
,
1057 const gdb_byte
*writebuf
, ULONGEST memaddr
, LONGEST len
,
1058 ULONGEST
*xfered_len
)
1060 enum target_xfer_status res
;
1064 res
= ops
->to_xfer_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1065 readbuf
, writebuf
, memaddr
, len
,
1067 if (res
== TARGET_XFER_OK
)
1070 /* Stop if the target reports that the memory is not available. */
1071 if (res
== TARGET_XFER_UNAVAILABLE
)
1074 /* We want to continue past core files to executables, but not
1075 past a running target's memory. */
1076 if (ops
->to_has_all_memory (ops
))
1081 while (ops
!= NULL
);
1083 /* The cache works at the raw memory level. Make sure the cache
1084 gets updated with raw contents no matter what kind of memory
1085 object was originally being written. Note we do write-through
1086 first, so that if it fails, we don't write to the cache contents
1087 that never made it to the target. */
1088 if (writebuf
!= NULL
1089 && !ptid_equal (inferior_ptid
, null_ptid
)
1090 && target_dcache_init_p ()
1091 && (stack_cache_enabled_p () || code_cache_enabled_p ()))
1093 DCACHE
*dcache
= target_dcache_get ();
1095 /* Note that writing to an area of memory which wasn't present
1096 in the cache doesn't cause it to be loaded in. */
1097 dcache_update (dcache
, res
, memaddr
, writebuf
, *xfered_len
);
1103 /* Perform a partial memory transfer.
1104 For docs see target.h, to_xfer_partial. */
1106 static enum target_xfer_status
1107 memory_xfer_partial_1 (struct target_ops
*ops
, enum target_object object
,
1108 gdb_byte
*readbuf
, const gdb_byte
*writebuf
, ULONGEST memaddr
,
1109 ULONGEST len
, ULONGEST
*xfered_len
)
1111 enum target_xfer_status res
;
1113 struct mem_region
*region
;
1114 struct inferior
*inf
;
1116 /* For accesses to unmapped overlay sections, read directly from
1117 files. Must do this first, as MEMADDR may need adjustment. */
1118 if (readbuf
!= NULL
&& overlay_debugging
)
1120 struct obj_section
*section
= find_pc_overlay (memaddr
);
1122 if (pc_in_unmapped_range (memaddr
, section
))
1124 struct target_section_table
*table
1125 = target_get_section_table (ops
);
1126 const char *section_name
= section
->the_bfd_section
->name
;
1128 memaddr
= overlay_mapped_address (memaddr
, section
);
1129 return section_table_xfer_memory_partial (readbuf
, writebuf
,
1130 memaddr
, len
, xfered_len
,
1132 table
->sections_end
,
1137 /* Try the executable files, if "trust-readonly-sections" is set. */
1138 if (readbuf
!= NULL
&& trust_readonly
)
1140 struct target_section
*secp
;
1141 struct target_section_table
*table
;
1143 secp
= target_section_by_addr (ops
, memaddr
);
1145 && (bfd_get_section_flags (secp
->the_bfd_section
->owner
,
1146 secp
->the_bfd_section
)
1149 table
= target_get_section_table (ops
);
1150 return section_table_xfer_memory_partial (readbuf
, writebuf
,
1151 memaddr
, len
, xfered_len
,
1153 table
->sections_end
,
1158 /* Try GDB's internal data cache. */
1160 if (!memory_xfer_check_region (readbuf
, writebuf
, memaddr
, len
, ®_len
,
1162 return TARGET_XFER_E_IO
;
1164 if (!ptid_equal (inferior_ptid
, null_ptid
))
1165 inf
= find_inferior_ptid (inferior_ptid
);
1171 /* The dcache reads whole cache lines; that doesn't play well
1172 with reading from a trace buffer, because reading outside of
1173 the collected memory range fails. */
1174 && get_traceframe_number () == -1
1175 && (region
->attrib
.cache
1176 || (stack_cache_enabled_p () && object
== TARGET_OBJECT_STACK_MEMORY
)
1177 || (code_cache_enabled_p () && object
== TARGET_OBJECT_CODE_MEMORY
)))
1179 DCACHE
*dcache
= target_dcache_get_or_init ();
1181 return dcache_read_memory_partial (ops
, dcache
, memaddr
, readbuf
,
1182 reg_len
, xfered_len
);
1185 /* If none of those methods found the memory we wanted, fall back
1186 to a target partial transfer. Normally a single call to
1187 to_xfer_partial is enough; if it doesn't recognize an object
1188 it will call the to_xfer_partial of the next target down.
1189 But for memory this won't do. Memory is the only target
1190 object which can be read from more than one valid target.
1191 A core file, for instance, could have some of memory but
1192 delegate other bits to the target below it. So, we must
1193 manually try all targets. */
1195 res
= raw_memory_xfer_partial (ops
, readbuf
, writebuf
, memaddr
, reg_len
,
1198 /* If we still haven't got anything, return the last error. We
1203 /* Perform a partial memory transfer. For docs see target.h,
1206 static enum target_xfer_status
1207 memory_xfer_partial (struct target_ops
*ops
, enum target_object object
,
1208 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1209 ULONGEST memaddr
, ULONGEST len
, ULONGEST
*xfered_len
)
1211 enum target_xfer_status res
;
1213 /* Zero length requests are ok and require no work. */
1215 return TARGET_XFER_EOF
;
1217 memaddr
= address_significant (target_gdbarch (), memaddr
);
1219 /* Fill in READBUF with breakpoint shadows, or WRITEBUF with
1220 breakpoint insns, thus hiding out from higher layers whether
1221 there are software breakpoints inserted in the code stream. */
1222 if (readbuf
!= NULL
)
1224 res
= memory_xfer_partial_1 (ops
, object
, readbuf
, NULL
, memaddr
, len
,
1227 if (res
== TARGET_XFER_OK
&& !show_memory_breakpoints
)
1228 breakpoint_xfer_memory (readbuf
, NULL
, NULL
, memaddr
, *xfered_len
);
1232 /* A large write request is likely to be partially satisfied
1233 by memory_xfer_partial_1. We will continually malloc
1234 and free a copy of the entire write request for breakpoint
1235 shadow handling even though we only end up writing a small
1236 subset of it. Cap writes to a limit specified by the target
1237 to mitigate this. */
1238 len
= std::min (ops
->to_get_memory_xfer_limit (ops
), len
);
1240 gdb::byte_vector
buf (writebuf
, writebuf
+ len
);
1241 breakpoint_xfer_memory (NULL
, buf
.data (), writebuf
, memaddr
, len
);
1242 res
= memory_xfer_partial_1 (ops
, object
, NULL
, buf
.data (), memaddr
, len
,
1249 scoped_restore_tmpl
<int>
1250 make_scoped_restore_show_memory_breakpoints (int show
)
1252 return make_scoped_restore (&show_memory_breakpoints
, show
);
1255 /* For docs see target.h, to_xfer_partial. */
1257 enum target_xfer_status
1258 target_xfer_partial (struct target_ops
*ops
,
1259 enum target_object object
, const char *annex
,
1260 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1261 ULONGEST offset
, ULONGEST len
,
1262 ULONGEST
*xfered_len
)
1264 enum target_xfer_status retval
;
1266 gdb_assert (ops
->to_xfer_partial
!= NULL
);
1268 /* Transfer is done when LEN is zero. */
1270 return TARGET_XFER_EOF
;
1272 if (writebuf
&& !may_write_memory
)
1273 error (_("Writing to memory is not allowed (addr %s, len %s)"),
1274 core_addr_to_string_nz (offset
), plongest (len
));
1278 /* If this is a memory transfer, let the memory-specific code
1279 have a look at it instead. Memory transfers are more
1281 if (object
== TARGET_OBJECT_MEMORY
|| object
== TARGET_OBJECT_STACK_MEMORY
1282 || object
== TARGET_OBJECT_CODE_MEMORY
)
1283 retval
= memory_xfer_partial (ops
, object
, readbuf
,
1284 writebuf
, offset
, len
, xfered_len
);
1285 else if (object
== TARGET_OBJECT_RAW_MEMORY
)
1287 /* Skip/avoid accessing the target if the memory region
1288 attributes block the access. Check this here instead of in
1289 raw_memory_xfer_partial as otherwise we'd end up checking
1290 this twice in the case of the memory_xfer_partial path is
1291 taken; once before checking the dcache, and another in the
1292 tail call to raw_memory_xfer_partial. */
1293 if (!memory_xfer_check_region (readbuf
, writebuf
, offset
, len
, &len
,
1295 return TARGET_XFER_E_IO
;
1297 /* Request the normal memory object from other layers. */
1298 retval
= raw_memory_xfer_partial (ops
, readbuf
, writebuf
, offset
, len
,
1302 retval
= ops
->to_xfer_partial (ops
, object
, annex
, readbuf
,
1303 writebuf
, offset
, len
, xfered_len
);
1307 const unsigned char *myaddr
= NULL
;
1309 fprintf_unfiltered (gdb_stdlog
,
1310 "%s:target_xfer_partial "
1311 "(%d, %s, %s, %s, %s, %s) = %d, %s",
1314 (annex
? annex
: "(null)"),
1315 host_address_to_string (readbuf
),
1316 host_address_to_string (writebuf
),
1317 core_addr_to_string_nz (offset
),
1318 pulongest (len
), retval
,
1319 pulongest (*xfered_len
));
1325 if (retval
== TARGET_XFER_OK
&& myaddr
!= NULL
)
1329 fputs_unfiltered (", bytes =", gdb_stdlog
);
1330 for (i
= 0; i
< *xfered_len
; i
++)
1332 if ((((intptr_t) &(myaddr
[i
])) & 0xf) == 0)
1334 if (targetdebug
< 2 && i
> 0)
1336 fprintf_unfiltered (gdb_stdlog
, " ...");
1339 fprintf_unfiltered (gdb_stdlog
, "\n");
1342 fprintf_unfiltered (gdb_stdlog
, " %02x", myaddr
[i
] & 0xff);
1346 fputc_unfiltered ('\n', gdb_stdlog
);
1349 /* Check implementations of to_xfer_partial update *XFERED_LEN
1350 properly. Do assertion after printing debug messages, so that we
1351 can find more clues on assertion failure from debugging messages. */
1352 if (retval
== TARGET_XFER_OK
|| retval
== TARGET_XFER_UNAVAILABLE
)
1353 gdb_assert (*xfered_len
> 0);
1358 /* Read LEN bytes of target memory at address MEMADDR, placing the
1359 results in GDB's memory at MYADDR. Returns either 0 for success or
1360 -1 if any error occurs.
1362 If an error occurs, no guarantee is made about the contents of the data at
1363 MYADDR. In particular, the caller should not depend upon partial reads
1364 filling the buffer with good data. There is no way for the caller to know
1365 how much good data might have been transfered anyway. Callers that can
1366 deal with partial reads should call target_read (which will retry until
1367 it makes no progress, and then return how much was transferred). */
1370 target_read_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1372 /* Dispatch to the topmost target, not the flattened current_target.
1373 Memory accesses check target->to_has_(all_)memory, and the
1374 flattened target doesn't inherit those. */
1375 if (target_read (current_target
.beneath
, TARGET_OBJECT_MEMORY
, NULL
,
1376 myaddr
, memaddr
, len
) == len
)
1382 /* See target/target.h. */
1385 target_read_uint32 (CORE_ADDR memaddr
, uint32_t *result
)
1390 r
= target_read_memory (memaddr
, buf
, sizeof buf
);
1393 *result
= extract_unsigned_integer (buf
, sizeof buf
,
1394 gdbarch_byte_order (target_gdbarch ()));
1398 /* Like target_read_memory, but specify explicitly that this is a read
1399 from the target's raw memory. That is, this read bypasses the
1400 dcache, breakpoint shadowing, etc. */
1403 target_read_raw_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1405 /* See comment in target_read_memory about why the request starts at
1406 current_target.beneath. */
1407 if (target_read (current_target
.beneath
, TARGET_OBJECT_RAW_MEMORY
, NULL
,
1408 myaddr
, memaddr
, len
) == len
)
1414 /* Like target_read_memory, but specify explicitly that this is a read from
1415 the target's stack. This may trigger different cache behavior. */
1418 target_read_stack (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1420 /* See comment in target_read_memory about why the request starts at
1421 current_target.beneath. */
1422 if (target_read (current_target
.beneath
, TARGET_OBJECT_STACK_MEMORY
, NULL
,
1423 myaddr
, memaddr
, len
) == len
)
1429 /* Like target_read_memory, but specify explicitly that this is a read from
1430 the target's code. This may trigger different cache behavior. */
1433 target_read_code (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1435 /* See comment in target_read_memory about why the request starts at
1436 current_target.beneath. */
1437 if (target_read (current_target
.beneath
, TARGET_OBJECT_CODE_MEMORY
, NULL
,
1438 myaddr
, memaddr
, len
) == len
)
1444 /* Write LEN bytes from MYADDR to target memory at address MEMADDR.
1445 Returns either 0 for success or -1 if any error occurs. If an
1446 error occurs, no guarantee is made about how much data got written.
1447 Callers that can deal with partial writes should call
1451 target_write_memory (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ssize_t len
)
1453 /* See comment in target_read_memory about why the request starts at
1454 current_target.beneath. */
1455 if (target_write (current_target
.beneath
, TARGET_OBJECT_MEMORY
, NULL
,
1456 myaddr
, memaddr
, len
) == len
)
1462 /* Write LEN bytes from MYADDR to target raw memory at address
1463 MEMADDR. Returns either 0 for success or -1 if any error occurs.
1464 If an error occurs, no guarantee is made about how much data got
1465 written. Callers that can deal with partial writes should call
1469 target_write_raw_memory (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ssize_t len
)
1471 /* See comment in target_read_memory about why the request starts at
1472 current_target.beneath. */
1473 if (target_write (current_target
.beneath
, TARGET_OBJECT_RAW_MEMORY
, NULL
,
1474 myaddr
, memaddr
, len
) == len
)
1480 /* Fetch the target's memory map. */
1482 std::vector
<mem_region
>
1483 target_memory_map (void)
1485 std::vector
<mem_region
> result
1486 = current_target
.to_memory_map (¤t_target
);
1487 if (result
.empty ())
1490 std::sort (result
.begin (), result
.end ());
1492 /* Check that regions do not overlap. Simultaneously assign
1493 a numbering for the "mem" commands to use to refer to
1495 mem_region
*last_one
= NULL
;
1496 for (size_t ix
= 0; ix
< result
.size (); ix
++)
1498 mem_region
*this_one
= &result
[ix
];
1499 this_one
->number
= ix
;
1501 if (last_one
!= NULL
&& last_one
->hi
> this_one
->lo
)
1503 warning (_("Overlapping regions in memory map: ignoring"));
1504 return std::vector
<mem_region
> ();
1507 last_one
= this_one
;
1514 target_flash_erase (ULONGEST address
, LONGEST length
)
1516 current_target
.to_flash_erase (¤t_target
, address
, length
);
1520 target_flash_done (void)
1522 current_target
.to_flash_done (¤t_target
);
1526 show_trust_readonly (struct ui_file
*file
, int from_tty
,
1527 struct cmd_list_element
*c
, const char *value
)
1529 fprintf_filtered (file
,
1530 _("Mode for reading from readonly sections is %s.\n"),
1534 /* Target vector read/write partial wrapper functions. */
1536 static enum target_xfer_status
1537 target_read_partial (struct target_ops
*ops
,
1538 enum target_object object
,
1539 const char *annex
, gdb_byte
*buf
,
1540 ULONGEST offset
, ULONGEST len
,
1541 ULONGEST
*xfered_len
)
1543 return target_xfer_partial (ops
, object
, annex
, buf
, NULL
, offset
, len
,
1547 static enum target_xfer_status
1548 target_write_partial (struct target_ops
*ops
,
1549 enum target_object object
,
1550 const char *annex
, const gdb_byte
*buf
,
1551 ULONGEST offset
, LONGEST len
, ULONGEST
*xfered_len
)
1553 return target_xfer_partial (ops
, object
, annex
, NULL
, buf
, offset
, len
,
1557 /* Wrappers to perform the full transfer. */
1559 /* For docs on target_read see target.h. */
1562 target_read (struct target_ops
*ops
,
1563 enum target_object object
,
1564 const char *annex
, gdb_byte
*buf
,
1565 ULONGEST offset
, LONGEST len
)
1567 LONGEST xfered_total
= 0;
1570 /* If we are reading from a memory object, find the length of an addressable
1571 unit for that architecture. */
1572 if (object
== TARGET_OBJECT_MEMORY
1573 || object
== TARGET_OBJECT_STACK_MEMORY
1574 || object
== TARGET_OBJECT_CODE_MEMORY
1575 || object
== TARGET_OBJECT_RAW_MEMORY
)
1576 unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
1578 while (xfered_total
< len
)
1580 ULONGEST xfered_partial
;
1581 enum target_xfer_status status
;
1583 status
= target_read_partial (ops
, object
, annex
,
1584 buf
+ xfered_total
* unit_size
,
1585 offset
+ xfered_total
, len
- xfered_total
,
1588 /* Call an observer, notifying them of the xfer progress? */
1589 if (status
== TARGET_XFER_EOF
)
1590 return xfered_total
;
1591 else if (status
== TARGET_XFER_OK
)
1593 xfered_total
+= xfered_partial
;
1597 return TARGET_XFER_E_IO
;
1603 /* Assuming that the entire [begin, end) range of memory cannot be
1604 read, try to read whatever subrange is possible to read.
1606 The function returns, in RESULT, either zero or one memory block.
1607 If there's a readable subrange at the beginning, it is completely
1608 read and returned. Any further readable subrange will not be read.
1609 Otherwise, if there's a readable subrange at the end, it will be
1610 completely read and returned. Any readable subranges before it
1611 (obviously, not starting at the beginning), will be ignored. In
1612 other cases -- either no readable subrange, or readable subrange(s)
1613 that is neither at the beginning, or end, nothing is returned.
1615 The purpose of this function is to handle a read across a boundary
1616 of accessible memory in a case when memory map is not available.
1617 The above restrictions are fine for this case, but will give
1618 incorrect results if the memory is 'patchy'. However, supporting
1619 'patchy' memory would require trying to read every single byte,
1620 and it seems unacceptable solution. Explicit memory map is
1621 recommended for this case -- and target_read_memory_robust will
1622 take care of reading multiple ranges then. */
1625 read_whatever_is_readable (struct target_ops
*ops
,
1626 const ULONGEST begin
, const ULONGEST end
,
1628 std::vector
<memory_read_result
> *result
)
1630 ULONGEST current_begin
= begin
;
1631 ULONGEST current_end
= end
;
1633 ULONGEST xfered_len
;
1635 /* If we previously failed to read 1 byte, nothing can be done here. */
1636 if (end
- begin
<= 1)
1639 gdb::unique_xmalloc_ptr
<gdb_byte
> buf ((gdb_byte
*) xmalloc (end
- begin
));
1641 /* Check that either first or the last byte is readable, and give up
1642 if not. This heuristic is meant to permit reading accessible memory
1643 at the boundary of accessible region. */
1644 if (target_read_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1645 buf
.get (), begin
, 1, &xfered_len
) == TARGET_XFER_OK
)
1650 else if (target_read_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1651 buf
.get () + (end
- begin
) - 1, end
- 1, 1,
1652 &xfered_len
) == TARGET_XFER_OK
)
1660 /* Loop invariant is that the [current_begin, current_end) was previously
1661 found to be not readable as a whole.
1663 Note loop condition -- if the range has 1 byte, we can't divide the range
1664 so there's no point trying further. */
1665 while (current_end
- current_begin
> 1)
1667 ULONGEST first_half_begin
, first_half_end
;
1668 ULONGEST second_half_begin
, second_half_end
;
1670 ULONGEST middle
= current_begin
+ (current_end
- current_begin
) / 2;
1674 first_half_begin
= current_begin
;
1675 first_half_end
= middle
;
1676 second_half_begin
= middle
;
1677 second_half_end
= current_end
;
1681 first_half_begin
= middle
;
1682 first_half_end
= current_end
;
1683 second_half_begin
= current_begin
;
1684 second_half_end
= middle
;
1687 xfer
= target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1688 buf
.get () + (first_half_begin
- begin
) * unit_size
,
1690 first_half_end
- first_half_begin
);
1692 if (xfer
== first_half_end
- first_half_begin
)
1694 /* This half reads up fine. So, the error must be in the
1696 current_begin
= second_half_begin
;
1697 current_end
= second_half_end
;
1701 /* This half is not readable. Because we've tried one byte, we
1702 know some part of this half if actually readable. Go to the next
1703 iteration to divide again and try to read.
1705 We don't handle the other half, because this function only tries
1706 to read a single readable subrange. */
1707 current_begin
= first_half_begin
;
1708 current_end
= first_half_end
;
1714 /* The [begin, current_begin) range has been read. */
1715 result
->emplace_back (begin
, current_end
, std::move (buf
));
1719 /* The [current_end, end) range has been read. */
1720 LONGEST region_len
= end
- current_end
;
1722 gdb::unique_xmalloc_ptr
<gdb_byte
> data
1723 ((gdb_byte
*) xmalloc (region_len
* unit_size
));
1724 memcpy (data
.get (), buf
.get () + (current_end
- begin
) * unit_size
,
1725 region_len
* unit_size
);
1726 result
->emplace_back (current_end
, end
, std::move (data
));
1730 std::vector
<memory_read_result
>
1731 read_memory_robust (struct target_ops
*ops
,
1732 const ULONGEST offset
, const LONGEST len
)
1734 std::vector
<memory_read_result
> result
;
1735 int unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
1737 LONGEST xfered_total
= 0;
1738 while (xfered_total
< len
)
1740 struct mem_region
*region
= lookup_mem_region (offset
+ xfered_total
);
1743 /* If there is no explicit region, a fake one should be created. */
1744 gdb_assert (region
);
1746 if (region
->hi
== 0)
1747 region_len
= len
- xfered_total
;
1749 region_len
= region
->hi
- offset
;
1751 if (region
->attrib
.mode
== MEM_NONE
|| region
->attrib
.mode
== MEM_WO
)
1753 /* Cannot read this region. Note that we can end up here only
1754 if the region is explicitly marked inaccessible, or
1755 'inaccessible-by-default' is in effect. */
1756 xfered_total
+= region_len
;
1760 LONGEST to_read
= std::min (len
- xfered_total
, region_len
);
1761 gdb::unique_xmalloc_ptr
<gdb_byte
> buffer
1762 ((gdb_byte
*) xmalloc (to_read
* unit_size
));
1764 LONGEST xfered_partial
=
1765 target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
, buffer
.get (),
1766 offset
+ xfered_total
, to_read
);
1767 /* Call an observer, notifying them of the xfer progress? */
1768 if (xfered_partial
<= 0)
1770 /* Got an error reading full chunk. See if maybe we can read
1772 read_whatever_is_readable (ops
, offset
+ xfered_total
,
1773 offset
+ xfered_total
+ to_read
,
1774 unit_size
, &result
);
1775 xfered_total
+= to_read
;
1779 result
.emplace_back (offset
+ xfered_total
,
1780 offset
+ xfered_total
+ xfered_partial
,
1781 std::move (buffer
));
1782 xfered_total
+= xfered_partial
;
1792 /* An alternative to target_write with progress callbacks. */
1795 target_write_with_progress (struct target_ops
*ops
,
1796 enum target_object object
,
1797 const char *annex
, const gdb_byte
*buf
,
1798 ULONGEST offset
, LONGEST len
,
1799 void (*progress
) (ULONGEST
, void *), void *baton
)
1801 LONGEST xfered_total
= 0;
1804 /* If we are writing to a memory object, find the length of an addressable
1805 unit for that architecture. */
1806 if (object
== TARGET_OBJECT_MEMORY
1807 || object
== TARGET_OBJECT_STACK_MEMORY
1808 || object
== TARGET_OBJECT_CODE_MEMORY
1809 || object
== TARGET_OBJECT_RAW_MEMORY
)
1810 unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
1812 /* Give the progress callback a chance to set up. */
1814 (*progress
) (0, baton
);
1816 while (xfered_total
< len
)
1818 ULONGEST xfered_partial
;
1819 enum target_xfer_status status
;
1821 status
= target_write_partial (ops
, object
, annex
,
1822 buf
+ xfered_total
* unit_size
,
1823 offset
+ xfered_total
, len
- xfered_total
,
1826 if (status
!= TARGET_XFER_OK
)
1827 return status
== TARGET_XFER_EOF
? xfered_total
: TARGET_XFER_E_IO
;
1830 (*progress
) (xfered_partial
, baton
);
1832 xfered_total
+= xfered_partial
;
1838 /* For docs on target_write see target.h. */
1841 target_write (struct target_ops
*ops
,
1842 enum target_object object
,
1843 const char *annex
, const gdb_byte
*buf
,
1844 ULONGEST offset
, LONGEST len
)
1846 return target_write_with_progress (ops
, object
, annex
, buf
, offset
, len
,
1850 /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return
1851 the size of the transferred data. PADDING additional bytes are
1852 available in *BUF_P. This is a helper function for
1853 target_read_alloc; see the declaration of that function for more
1857 target_read_alloc_1 (struct target_ops
*ops
, enum target_object object
,
1858 const char *annex
, gdb_byte
**buf_p
, int padding
)
1860 size_t buf_alloc
, buf_pos
;
1863 /* This function does not have a length parameter; it reads the
1864 entire OBJECT). Also, it doesn't support objects fetched partly
1865 from one target and partly from another (in a different stratum,
1866 e.g. a core file and an executable). Both reasons make it
1867 unsuitable for reading memory. */
1868 gdb_assert (object
!= TARGET_OBJECT_MEMORY
);
1870 /* Start by reading up to 4K at a time. The target will throttle
1871 this number down if necessary. */
1873 buf
= (gdb_byte
*) xmalloc (buf_alloc
);
1877 ULONGEST xfered_len
;
1878 enum target_xfer_status status
;
1880 status
= target_read_partial (ops
, object
, annex
, &buf
[buf_pos
],
1881 buf_pos
, buf_alloc
- buf_pos
- padding
,
1884 if (status
== TARGET_XFER_EOF
)
1886 /* Read all there was. */
1893 else if (status
!= TARGET_XFER_OK
)
1895 /* An error occurred. */
1897 return TARGET_XFER_E_IO
;
1900 buf_pos
+= xfered_len
;
1902 /* If the buffer is filling up, expand it. */
1903 if (buf_alloc
< buf_pos
* 2)
1906 buf
= (gdb_byte
*) xrealloc (buf
, buf_alloc
);
1913 /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return
1914 the size of the transferred data. See the declaration in "target.h"
1915 function for more information about the return value. */
1918 target_read_alloc (struct target_ops
*ops
, enum target_object object
,
1919 const char *annex
, gdb_byte
**buf_p
)
1921 return target_read_alloc_1 (ops
, object
, annex
, buf_p
, 0);
1926 gdb::unique_xmalloc_ptr
<char>
1927 target_read_stralloc (struct target_ops
*ops
, enum target_object object
,
1932 LONGEST i
, transferred
;
1934 transferred
= target_read_alloc_1 (ops
, object
, annex
, &buffer
, 1);
1935 bufstr
= (char *) buffer
;
1937 if (transferred
< 0)
1940 if (transferred
== 0)
1941 return gdb::unique_xmalloc_ptr
<char> (xstrdup (""));
1943 bufstr
[transferred
] = 0;
1945 /* Check for embedded NUL bytes; but allow trailing NULs. */
1946 for (i
= strlen (bufstr
); i
< transferred
; i
++)
1949 warning (_("target object %d, annex %s, "
1950 "contained unexpected null characters"),
1951 (int) object
, annex
? annex
: "(none)");
1955 return gdb::unique_xmalloc_ptr
<char> (bufstr
);
1958 /* Memory transfer methods. */
1961 get_target_memory (struct target_ops
*ops
, CORE_ADDR addr
, gdb_byte
*buf
,
1964 /* This method is used to read from an alternate, non-current
1965 target. This read must bypass the overlay support (as symbols
1966 don't match this target), and GDB's internal cache (wrong cache
1967 for this target). */
1968 if (target_read (ops
, TARGET_OBJECT_RAW_MEMORY
, NULL
, buf
, addr
, len
)
1970 memory_error (TARGET_XFER_E_IO
, addr
);
1974 get_target_memory_unsigned (struct target_ops
*ops
, CORE_ADDR addr
,
1975 int len
, enum bfd_endian byte_order
)
1977 gdb_byte buf
[sizeof (ULONGEST
)];
1979 gdb_assert (len
<= sizeof (buf
));
1980 get_target_memory (ops
, addr
, buf
, len
);
1981 return extract_unsigned_integer (buf
, len
, byte_order
);
1987 target_insert_breakpoint (struct gdbarch
*gdbarch
,
1988 struct bp_target_info
*bp_tgt
)
1990 if (!may_insert_breakpoints
)
1992 warning (_("May not insert breakpoints"));
1996 return current_target
.to_insert_breakpoint (¤t_target
,
2003 target_remove_breakpoint (struct gdbarch
*gdbarch
,
2004 struct bp_target_info
*bp_tgt
,
2005 enum remove_bp_reason reason
)
2007 /* This is kind of a weird case to handle, but the permission might
2008 have been changed after breakpoints were inserted - in which case
2009 we should just take the user literally and assume that any
2010 breakpoints should be left in place. */
2011 if (!may_insert_breakpoints
)
2013 warning (_("May not remove breakpoints"));
2017 return current_target
.to_remove_breakpoint (¤t_target
,
2018 gdbarch
, bp_tgt
, reason
);
2022 info_target_command (const char *args
, int from_tty
)
2024 struct target_ops
*t
;
2025 int has_all_mem
= 0;
2027 if (symfile_objfile
!= NULL
)
2028 printf_unfiltered (_("Symbols from \"%s\".\n"),
2029 objfile_name (symfile_objfile
));
2031 for (t
= target_stack
; t
!= NULL
; t
= t
->beneath
)
2033 if (!(*t
->to_has_memory
) (t
))
2036 if ((int) (t
->to_stratum
) <= (int) dummy_stratum
)
2039 printf_unfiltered (_("\tWhile running this, "
2040 "GDB does not access memory from...\n"));
2041 printf_unfiltered ("%s:\n", t
->to_longname
);
2042 (t
->to_files_info
) (t
);
2043 has_all_mem
= (*t
->to_has_all_memory
) (t
);
2047 /* This function is called before any new inferior is created, e.g.
2048 by running a program, attaching, or connecting to a target.
2049 It cleans up any state from previous invocations which might
2050 change between runs. This is a subset of what target_preopen
2051 resets (things which might change between targets). */
2054 target_pre_inferior (int from_tty
)
2056 /* Clear out solib state. Otherwise the solib state of the previous
2057 inferior might have survived and is entirely wrong for the new
2058 target. This has been observed on GNU/Linux using glibc 2.3. How
2070 Cannot access memory at address 0xdeadbeef
2073 /* In some OSs, the shared library list is the same/global/shared
2074 across inferiors. If code is shared between processes, so are
2075 memory regions and features. */
2076 if (!gdbarch_has_global_solist (target_gdbarch ()))
2078 no_shared_libraries (NULL
, from_tty
);
2080 invalidate_target_mem_regions ();
2082 target_clear_description ();
2085 /* attach_flag may be set if the previous process associated with
2086 the inferior was attached to. */
2087 current_inferior ()->attach_flag
= 0;
2089 current_inferior ()->highest_thread_num
= 0;
2091 agent_capability_invalidate ();
2094 /* Callback for iterate_over_inferiors. Gets rid of the given
2098 dispose_inferior (struct inferior
*inf
, void *args
)
2100 struct thread_info
*thread
;
2102 thread
= any_thread_of_process (inf
->pid
);
2105 switch_to_thread (thread
->ptid
);
2107 /* Core inferiors actually should be detached, not killed. */
2108 if (target_has_execution
)
2111 target_detach (inf
, 0);
2117 /* This is to be called by the open routine before it does
2121 target_preopen (int from_tty
)
2125 if (have_inferiors ())
2128 || !have_live_inferiors ()
2129 || query (_("A program is being debugged already. Kill it? ")))
2130 iterate_over_inferiors (dispose_inferior
, NULL
);
2132 error (_("Program not killed."));
2135 /* Calling target_kill may remove the target from the stack. But if
2136 it doesn't (which seems like a win for UDI), remove it now. */
2137 /* Leave the exec target, though. The user may be switching from a
2138 live process to a core of the same program. */
2139 pop_all_targets_above (file_stratum
);
2141 target_pre_inferior (from_tty
);
2147 target_detach (inferior
*inf
, int from_tty
)
2149 /* As long as some to_detach implementations rely on the current_inferior
2150 (either directly, or indirectly, like through target_gdbarch or by
2151 reading memory), INF needs to be the current inferior. When that
2152 requirement will become no longer true, then we can remove this
2154 gdb_assert (inf
== current_inferior ());
2156 if (gdbarch_has_global_breakpoints (target_gdbarch ()))
2157 /* Don't remove global breakpoints here. They're removed on
2158 disconnection from the target. */
2161 /* If we're in breakpoints-always-inserted mode, have to remove
2162 them before detaching. */
2163 remove_breakpoints_pid (ptid_get_pid (inferior_ptid
));
2165 prepare_for_detach ();
2167 current_target
.to_detach (¤t_target
, inf
, from_tty
);
2171 target_disconnect (const char *args
, int from_tty
)
2173 /* If we're in breakpoints-always-inserted mode or if breakpoints
2174 are global across processes, we have to remove them before
2176 remove_breakpoints ();
2178 current_target
.to_disconnect (¤t_target
, args
, from_tty
);
2181 /* See target/target.h. */
2184 target_wait (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
2186 return (current_target
.to_wait
) (¤t_target
, ptid
, status
, options
);
2192 default_target_wait (struct target_ops
*ops
,
2193 ptid_t ptid
, struct target_waitstatus
*status
,
2196 status
->kind
= TARGET_WAITKIND_IGNORE
;
2197 return minus_one_ptid
;
2201 target_pid_to_str (ptid_t ptid
)
2203 return (*current_target
.to_pid_to_str
) (¤t_target
, ptid
);
2207 target_thread_name (struct thread_info
*info
)
2209 return current_target
.to_thread_name (¤t_target
, info
);
2212 struct thread_info
*
2213 target_thread_handle_to_thread_info (const gdb_byte
*thread_handle
,
2215 struct inferior
*inf
)
2217 return current_target
.to_thread_handle_to_thread_info
2218 (¤t_target
, thread_handle
, handle_len
, inf
);
2222 target_resume (ptid_t ptid
, int step
, enum gdb_signal signal
)
2224 target_dcache_invalidate ();
2226 current_target
.to_resume (¤t_target
, ptid
, step
, signal
);
2228 registers_changed_ptid (ptid
);
2229 /* We only set the internal executing state here. The user/frontend
2230 running state is set at a higher level. */
2231 set_executing (ptid
, 1);
2232 clear_inline_frame_state (ptid
);
2235 /* If true, target_commit_resume is a nop. */
2236 static int defer_target_commit_resume
;
2241 target_commit_resume (void)
2243 if (defer_target_commit_resume
)
2246 current_target
.to_commit_resume (¤t_target
);
2251 scoped_restore_tmpl
<int>
2252 make_scoped_defer_target_commit_resume ()
2254 return make_scoped_restore (&defer_target_commit_resume
, 1);
2258 target_pass_signals (int numsigs
, unsigned char *pass_signals
)
2260 (*current_target
.to_pass_signals
) (¤t_target
, numsigs
, pass_signals
);
2264 target_program_signals (int numsigs
, unsigned char *program_signals
)
2266 (*current_target
.to_program_signals
) (¤t_target
,
2267 numsigs
, program_signals
);
2271 default_follow_fork (struct target_ops
*self
, int follow_child
,
2274 /* Some target returned a fork event, but did not know how to follow it. */
2275 internal_error (__FILE__
, __LINE__
,
2276 _("could not find a target to follow fork"));
2279 /* Look through the list of possible targets for a target that can
2283 target_follow_fork (int follow_child
, int detach_fork
)
2285 return current_target
.to_follow_fork (¤t_target
,
2286 follow_child
, detach_fork
);
2289 /* Target wrapper for follow exec hook. */
2292 target_follow_exec (struct inferior
*inf
, char *execd_pathname
)
2294 current_target
.to_follow_exec (¤t_target
, inf
, execd_pathname
);
2298 default_mourn_inferior (struct target_ops
*self
)
2300 internal_error (__FILE__
, __LINE__
,
2301 _("could not find a target to follow mourn inferior"));
2305 target_mourn_inferior (ptid_t ptid
)
2307 gdb_assert (ptid_equal (ptid
, inferior_ptid
));
2308 current_target
.to_mourn_inferior (¤t_target
);
2310 /* We no longer need to keep handles on any of the object files.
2311 Make sure to release them to avoid unnecessarily locking any
2312 of them while we're not actually debugging. */
2313 bfd_cache_close_all ();
2316 /* Look for a target which can describe architectural features, starting
2317 from TARGET. If we find one, return its description. */
2319 const struct target_desc
*
2320 target_read_description (struct target_ops
*target
)
2322 return target
->to_read_description (target
);
2325 /* This implements a basic search of memory, reading target memory and
2326 performing the search here (as opposed to performing the search in on the
2327 target side with, for example, gdbserver). */
2330 simple_search_memory (struct target_ops
*ops
,
2331 CORE_ADDR start_addr
, ULONGEST search_space_len
,
2332 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2333 CORE_ADDR
*found_addrp
)
2335 /* NOTE: also defined in find.c testcase. */
2336 #define SEARCH_CHUNK_SIZE 16000
2337 const unsigned chunk_size
= SEARCH_CHUNK_SIZE
;
2338 /* Buffer to hold memory contents for searching. */
2339 unsigned search_buf_size
;
2341 search_buf_size
= chunk_size
+ pattern_len
- 1;
2343 /* No point in trying to allocate a buffer larger than the search space. */
2344 if (search_space_len
< search_buf_size
)
2345 search_buf_size
= search_space_len
;
2347 gdb::byte_vector
search_buf (search_buf_size
);
2349 /* Prime the search buffer. */
2351 if (target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2352 search_buf
.data (), start_addr
, search_buf_size
)
2355 warning (_("Unable to access %s bytes of target "
2356 "memory at %s, halting search."),
2357 pulongest (search_buf_size
), hex_string (start_addr
));
2361 /* Perform the search.
2363 The loop is kept simple by allocating [N + pattern-length - 1] bytes.
2364 When we've scanned N bytes we copy the trailing bytes to the start and
2365 read in another N bytes. */
2367 while (search_space_len
>= pattern_len
)
2369 gdb_byte
*found_ptr
;
2370 unsigned nr_search_bytes
2371 = std::min (search_space_len
, (ULONGEST
) search_buf_size
);
2373 found_ptr
= (gdb_byte
*) memmem (search_buf
.data (), nr_search_bytes
,
2374 pattern
, pattern_len
);
2376 if (found_ptr
!= NULL
)
2378 CORE_ADDR found_addr
= start_addr
+ (found_ptr
- search_buf
.data ());
2380 *found_addrp
= found_addr
;
2384 /* Not found in this chunk, skip to next chunk. */
2386 /* Don't let search_space_len wrap here, it's unsigned. */
2387 if (search_space_len
>= chunk_size
)
2388 search_space_len
-= chunk_size
;
2390 search_space_len
= 0;
2392 if (search_space_len
>= pattern_len
)
2394 unsigned keep_len
= search_buf_size
- chunk_size
;
2395 CORE_ADDR read_addr
= start_addr
+ chunk_size
+ keep_len
;
2398 /* Copy the trailing part of the previous iteration to the front
2399 of the buffer for the next iteration. */
2400 gdb_assert (keep_len
== pattern_len
- 1);
2401 memcpy (&search_buf
[0], &search_buf
[chunk_size
], keep_len
);
2403 nr_to_read
= std::min (search_space_len
- keep_len
,
2404 (ULONGEST
) chunk_size
);
2406 if (target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2407 &search_buf
[keep_len
], read_addr
,
2408 nr_to_read
) != nr_to_read
)
2410 warning (_("Unable to access %s bytes of target "
2411 "memory at %s, halting search."),
2412 plongest (nr_to_read
),
2413 hex_string (read_addr
));
2417 start_addr
+= chunk_size
;
2426 /* Default implementation of memory-searching. */
2429 default_search_memory (struct target_ops
*self
,
2430 CORE_ADDR start_addr
, ULONGEST search_space_len
,
2431 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2432 CORE_ADDR
*found_addrp
)
2434 /* Start over from the top of the target stack. */
2435 return simple_search_memory (current_target
.beneath
,
2436 start_addr
, search_space_len
,
2437 pattern
, pattern_len
, found_addrp
);
2440 /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the
2441 sequence of bytes in PATTERN with length PATTERN_LEN.
2443 The result is 1 if found, 0 if not found, and -1 if there was an error
2444 requiring halting of the search (e.g. memory read error).
2445 If the pattern is found the address is recorded in FOUND_ADDRP. */
2448 target_search_memory (CORE_ADDR start_addr
, ULONGEST search_space_len
,
2449 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2450 CORE_ADDR
*found_addrp
)
2452 return current_target
.to_search_memory (¤t_target
, start_addr
,
2454 pattern
, pattern_len
, found_addrp
);
2457 /* Look through the currently pushed targets. If none of them will
2458 be able to restart the currently running process, issue an error
2462 target_require_runnable (void)
2464 struct target_ops
*t
;
2466 for (t
= target_stack
; t
!= NULL
; t
= t
->beneath
)
2468 /* If this target knows how to create a new program, then
2469 assume we will still be able to after killing the current
2470 one. Either killing and mourning will not pop T, or else
2471 find_default_run_target will find it again. */
2472 if (t
->to_create_inferior
!= NULL
)
2475 /* Do not worry about targets at certain strata that can not
2476 create inferiors. Assume they will be pushed again if
2477 necessary, and continue to the process_stratum. */
2478 if (t
->to_stratum
== thread_stratum
2479 || t
->to_stratum
== record_stratum
2480 || t
->to_stratum
== arch_stratum
)
2483 error (_("The \"%s\" target does not support \"run\". "
2484 "Try \"help target\" or \"continue\"."),
2488 /* This function is only called if the target is running. In that
2489 case there should have been a process_stratum target and it
2490 should either know how to create inferiors, or not... */
2491 internal_error (__FILE__
, __LINE__
, _("No targets found"));
2494 /* Whether GDB is allowed to fall back to the default run target for
2495 "run", "attach", etc. when no target is connected yet. */
2496 static int auto_connect_native_target
= 1;
2499 show_auto_connect_native_target (struct ui_file
*file
, int from_tty
,
2500 struct cmd_list_element
*c
, const char *value
)
2502 fprintf_filtered (file
,
2503 _("Whether GDB may automatically connect to the "
2504 "native target is %s.\n"),
2508 /* Look through the list of possible targets for a target that can
2509 execute a run or attach command without any other data. This is
2510 used to locate the default process stratum.
2512 If DO_MESG is not NULL, the result is always valid (error() is
2513 called for errors); else, return NULL on error. */
2515 static struct target_ops
*
2516 find_default_run_target (const char *do_mesg
)
2518 struct target_ops
*runable
= NULL
;
2520 if (auto_connect_native_target
)
2522 struct target_ops
*t
;
2526 for (i
= 0; VEC_iterate (target_ops_p
, target_structs
, i
, t
); ++i
)
2528 if (t
->to_can_run
!= delegate_can_run
&& target_can_run (t
))
2539 if (runable
== NULL
)
2542 error (_("Don't know how to %s. Try \"help target\"."), do_mesg
);
2553 find_attach_target (void)
2555 struct target_ops
*t
;
2557 /* If a target on the current stack can attach, use it. */
2558 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2560 if (t
->to_attach
!= NULL
)
2564 /* Otherwise, use the default run target for attaching. */
2566 t
= find_default_run_target ("attach");
2574 find_run_target (void)
2576 struct target_ops
*t
;
2578 /* If a target on the current stack can attach, use it. */
2579 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2581 if (t
->to_create_inferior
!= NULL
)
2585 /* Otherwise, use the default run target. */
2587 t
= find_default_run_target ("run");
2592 /* Implement the "info proc" command. */
2595 target_info_proc (const char *args
, enum info_proc_what what
)
2597 struct target_ops
*t
;
2599 /* If we're already connected to something that can get us OS
2600 related data, use it. Otherwise, try using the native
2602 if (current_target
.to_stratum
>= process_stratum
)
2603 t
= current_target
.beneath
;
2605 t
= find_default_run_target (NULL
);
2607 for (; t
!= NULL
; t
= t
->beneath
)
2609 if (t
->to_info_proc
!= NULL
)
2611 t
->to_info_proc (t
, args
, what
);
2614 fprintf_unfiltered (gdb_stdlog
,
2615 "target_info_proc (\"%s\", %d)\n", args
, what
);
2625 find_default_supports_disable_randomization (struct target_ops
*self
)
2627 struct target_ops
*t
;
2629 t
= find_default_run_target (NULL
);
2630 if (t
&& t
->to_supports_disable_randomization
)
2631 return (t
->to_supports_disable_randomization
) (t
);
2636 target_supports_disable_randomization (void)
2638 struct target_ops
*t
;
2640 for (t
= ¤t_target
; t
!= NULL
; t
= t
->beneath
)
2641 if (t
->to_supports_disable_randomization
)
2642 return t
->to_supports_disable_randomization (t
);
2647 /* See target/target.h. */
2650 target_supports_multi_process (void)
2652 return (*current_target
.to_supports_multi_process
) (¤t_target
);
2657 gdb::unique_xmalloc_ptr
<char>
2658 target_get_osdata (const char *type
)
2660 struct target_ops
*t
;
2662 /* If we're already connected to something that can get us OS
2663 related data, use it. Otherwise, try using the native
2665 if (current_target
.to_stratum
>= process_stratum
)
2666 t
= current_target
.beneath
;
2668 t
= find_default_run_target ("get OS data");
2673 return target_read_stralloc (t
, TARGET_OBJECT_OSDATA
, type
);
2676 static struct address_space
*
2677 default_thread_address_space (struct target_ops
*self
, ptid_t ptid
)
2679 struct inferior
*inf
;
2681 /* Fall-back to the "main" address space of the inferior. */
2682 inf
= find_inferior_ptid (ptid
);
2684 if (inf
== NULL
|| inf
->aspace
== NULL
)
2685 internal_error (__FILE__
, __LINE__
,
2686 _("Can't determine the current "
2687 "address space of thread %s\n"),
2688 target_pid_to_str (ptid
));
2693 /* Determine the current address space of thread PTID. */
2695 struct address_space
*
2696 target_thread_address_space (ptid_t ptid
)
2698 struct address_space
*aspace
;
2700 aspace
= current_target
.to_thread_address_space (¤t_target
, ptid
);
2701 gdb_assert (aspace
!= NULL
);
2707 /* Target file operations. */
2709 static struct target_ops
*
2710 default_fileio_target (void)
2712 /* If we're already connected to something that can perform
2713 file I/O, use it. Otherwise, try using the native target. */
2714 if (current_target
.to_stratum
>= process_stratum
)
2715 return current_target
.beneath
;
2717 return find_default_run_target ("file I/O");
2720 /* File handle for target file operations. */
2724 /* The target on which this file is open. */
2725 struct target_ops
*t
;
2727 /* The file descriptor on the target. */
2731 DEF_VEC_O (fileio_fh_t
);
2733 /* Vector of currently open file handles. The value returned by
2734 target_fileio_open and passed as the FD argument to other
2735 target_fileio_* functions is an index into this vector. This
2736 vector's entries are never freed; instead, files are marked as
2737 closed, and the handle becomes available for reuse. */
2738 static VEC (fileio_fh_t
) *fileio_fhandles
;
2740 /* Macro to check whether a fileio_fh_t represents a closed file. */
2741 #define is_closed_fileio_fh(fd) ((fd) < 0)
2743 /* Index into fileio_fhandles of the lowest handle that might be
2744 closed. This permits handle reuse without searching the whole
2745 list each time a new file is opened. */
2746 static int lowest_closed_fd
;
2748 /* Acquire a target fileio file descriptor. */
2751 acquire_fileio_fd (struct target_ops
*t
, int fd
)
2755 gdb_assert (!is_closed_fileio_fh (fd
));
2757 /* Search for closed handles to reuse. */
2759 VEC_iterate (fileio_fh_t
, fileio_fhandles
,
2760 lowest_closed_fd
, fh
);
2762 if (is_closed_fileio_fh (fh
->fd
))
2765 /* Push a new handle if no closed handles were found. */
2766 if (lowest_closed_fd
== VEC_length (fileio_fh_t
, fileio_fhandles
))
2767 fh
= VEC_safe_push (fileio_fh_t
, fileio_fhandles
, NULL
);
2769 /* Fill in the handle. */
2773 /* Return its index, and start the next lookup at
2775 return lowest_closed_fd
++;
2778 /* Release a target fileio file descriptor. */
2781 release_fileio_fd (int fd
, fileio_fh_t
*fh
)
2784 lowest_closed_fd
= std::min (lowest_closed_fd
, fd
);
2787 /* Return a pointer to the fileio_fhandle_t corresponding to FD. */
2789 #define fileio_fd_to_fh(fd) \
2790 VEC_index (fileio_fh_t, fileio_fhandles, (fd))
2792 /* Helper for target_fileio_open and
2793 target_fileio_open_warn_if_slow. */
2796 target_fileio_open_1 (struct inferior
*inf
, const char *filename
,
2797 int flags
, int mode
, int warn_if_slow
,
2800 struct target_ops
*t
;
2802 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
2804 if (t
->to_fileio_open
!= NULL
)
2806 int fd
= t
->to_fileio_open (t
, inf
, filename
, flags
, mode
,
2807 warn_if_slow
, target_errno
);
2812 fd
= acquire_fileio_fd (t
, fd
);
2815 fprintf_unfiltered (gdb_stdlog
,
2816 "target_fileio_open (%d,%s,0x%x,0%o,%d)"
2818 inf
== NULL
? 0 : inf
->num
,
2819 filename
, flags
, mode
,
2821 fd
!= -1 ? 0 : *target_errno
);
2826 *target_errno
= FILEIO_ENOSYS
;
2833 target_fileio_open (struct inferior
*inf
, const char *filename
,
2834 int flags
, int mode
, int *target_errno
)
2836 return target_fileio_open_1 (inf
, filename
, flags
, mode
, 0,
2843 target_fileio_open_warn_if_slow (struct inferior
*inf
,
2844 const char *filename
,
2845 int flags
, int mode
, int *target_errno
)
2847 return target_fileio_open_1 (inf
, filename
, flags
, mode
, 1,
2854 target_fileio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
2855 ULONGEST offset
, int *target_errno
)
2857 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
2860 if (is_closed_fileio_fh (fh
->fd
))
2861 *target_errno
= EBADF
;
2863 ret
= fh
->t
->to_fileio_pwrite (fh
->t
, fh
->fd
, write_buf
,
2864 len
, offset
, target_errno
);
2867 fprintf_unfiltered (gdb_stdlog
,
2868 "target_fileio_pwrite (%d,...,%d,%s) "
2870 fd
, len
, pulongest (offset
),
2871 ret
, ret
!= -1 ? 0 : *target_errno
);
2878 target_fileio_pread (int fd
, gdb_byte
*read_buf
, int len
,
2879 ULONGEST offset
, int *target_errno
)
2881 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
2884 if (is_closed_fileio_fh (fh
->fd
))
2885 *target_errno
= EBADF
;
2887 ret
= fh
->t
->to_fileio_pread (fh
->t
, fh
->fd
, read_buf
,
2888 len
, offset
, target_errno
);
2891 fprintf_unfiltered (gdb_stdlog
,
2892 "target_fileio_pread (%d,...,%d,%s) "
2894 fd
, len
, pulongest (offset
),
2895 ret
, ret
!= -1 ? 0 : *target_errno
);
2902 target_fileio_fstat (int fd
, struct stat
*sb
, int *target_errno
)
2904 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
2907 if (is_closed_fileio_fh (fh
->fd
))
2908 *target_errno
= EBADF
;
2910 ret
= fh
->t
->to_fileio_fstat (fh
->t
, fh
->fd
, sb
, target_errno
);
2913 fprintf_unfiltered (gdb_stdlog
,
2914 "target_fileio_fstat (%d) = %d (%d)\n",
2915 fd
, ret
, ret
!= -1 ? 0 : *target_errno
);
2922 target_fileio_close (int fd
, int *target_errno
)
2924 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
2927 if (is_closed_fileio_fh (fh
->fd
))
2928 *target_errno
= EBADF
;
2931 ret
= fh
->t
->to_fileio_close (fh
->t
, fh
->fd
, target_errno
);
2932 release_fileio_fd (fd
, fh
);
2936 fprintf_unfiltered (gdb_stdlog
,
2937 "target_fileio_close (%d) = %d (%d)\n",
2938 fd
, ret
, ret
!= -1 ? 0 : *target_errno
);
2945 target_fileio_unlink (struct inferior
*inf
, const char *filename
,
2948 struct target_ops
*t
;
2950 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
2952 if (t
->to_fileio_unlink
!= NULL
)
2954 int ret
= t
->to_fileio_unlink (t
, inf
, filename
,
2958 fprintf_unfiltered (gdb_stdlog
,
2959 "target_fileio_unlink (%d,%s)"
2961 inf
== NULL
? 0 : inf
->num
, filename
,
2962 ret
, ret
!= -1 ? 0 : *target_errno
);
2967 *target_errno
= FILEIO_ENOSYS
;
2974 target_fileio_readlink (struct inferior
*inf
, const char *filename
,
2977 struct target_ops
*t
;
2979 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
2981 if (t
->to_fileio_readlink
!= NULL
)
2983 char *ret
= t
->to_fileio_readlink (t
, inf
, filename
,
2987 fprintf_unfiltered (gdb_stdlog
,
2988 "target_fileio_readlink (%d,%s)"
2990 inf
== NULL
? 0 : inf
->num
,
2991 filename
, ret
? ret
: "(nil)",
2992 ret
? 0 : *target_errno
);
2997 *target_errno
= FILEIO_ENOSYS
;
3002 target_fileio_close_cleanup (void *opaque
)
3004 int fd
= *(int *) opaque
;
3007 target_fileio_close (fd
, &target_errno
);
3010 /* Read target file FILENAME, in the filesystem as seen by INF. If
3011 INF is NULL, use the filesystem seen by the debugger (GDB or, for
3012 remote targets, the remote stub). Store the result in *BUF_P and
3013 return the size of the transferred data. PADDING additional bytes
3014 are available in *BUF_P. This is a helper function for
3015 target_fileio_read_alloc; see the declaration of that function for
3016 more information. */
3019 target_fileio_read_alloc_1 (struct inferior
*inf
, const char *filename
,
3020 gdb_byte
**buf_p
, int padding
)
3022 struct cleanup
*close_cleanup
;
3023 size_t buf_alloc
, buf_pos
;
3029 fd
= target_fileio_open (inf
, filename
, FILEIO_O_RDONLY
, 0700,
3034 close_cleanup
= make_cleanup (target_fileio_close_cleanup
, &fd
);
3036 /* Start by reading up to 4K at a time. The target will throttle
3037 this number down if necessary. */
3039 buf
= (gdb_byte
*) xmalloc (buf_alloc
);
3043 n
= target_fileio_pread (fd
, &buf
[buf_pos
],
3044 buf_alloc
- buf_pos
- padding
, buf_pos
,
3048 /* An error occurred. */
3049 do_cleanups (close_cleanup
);
3055 /* Read all there was. */
3056 do_cleanups (close_cleanup
);
3066 /* If the buffer is filling up, expand it. */
3067 if (buf_alloc
< buf_pos
* 2)
3070 buf
= (gdb_byte
*) xrealloc (buf
, buf_alloc
);
3080 target_fileio_read_alloc (struct inferior
*inf
, const char *filename
,
3083 return target_fileio_read_alloc_1 (inf
, filename
, buf_p
, 0);
3088 gdb::unique_xmalloc_ptr
<char>
3089 target_fileio_read_stralloc (struct inferior
*inf
, const char *filename
)
3093 LONGEST i
, transferred
;
3095 transferred
= target_fileio_read_alloc_1 (inf
, filename
, &buffer
, 1);
3096 bufstr
= (char *) buffer
;
3098 if (transferred
< 0)
3099 return gdb::unique_xmalloc_ptr
<char> (nullptr);
3101 if (transferred
== 0)
3102 return gdb::unique_xmalloc_ptr
<char> (xstrdup (""));
3104 bufstr
[transferred
] = 0;
3106 /* Check for embedded NUL bytes; but allow trailing NULs. */
3107 for (i
= strlen (bufstr
); i
< transferred
; i
++)
3110 warning (_("target file %s "
3111 "contained unexpected null characters"),
3116 return gdb::unique_xmalloc_ptr
<char> (bufstr
);
3121 default_region_ok_for_hw_watchpoint (struct target_ops
*self
,
3122 CORE_ADDR addr
, int len
)
3124 return (len
<= gdbarch_ptr_bit (target_gdbarch ()) / TARGET_CHAR_BIT
);
3128 default_watchpoint_addr_within_range (struct target_ops
*target
,
3130 CORE_ADDR start
, int length
)
3132 return addr
>= start
&& addr
< start
+ length
;
3135 static struct gdbarch
*
3136 default_thread_architecture (struct target_ops
*ops
, ptid_t ptid
)
3138 inferior
*inf
= find_inferior_ptid (ptid
);
3139 gdb_assert (inf
!= NULL
);
3140 return inf
->gdbarch
;
3144 return_zero (struct target_ops
*ignore
)
3150 return_zero_has_execution (struct target_ops
*ignore
, ptid_t ignore2
)
3156 * Find the next target down the stack from the specified target.
3160 find_target_beneath (struct target_ops
*t
)
3168 find_target_at (enum strata stratum
)
3170 struct target_ops
*t
;
3172 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3173 if (t
->to_stratum
== stratum
)
3184 target_announce_detach (int from_tty
)
3187 const char *exec_file
;
3192 exec_file
= get_exec_file (0);
3193 if (exec_file
== NULL
)
3196 pid
= ptid_get_pid (inferior_ptid
);
3197 printf_unfiltered (_("Detaching from program: %s, %s\n"), exec_file
,
3198 target_pid_to_str (pid_to_ptid (pid
)));
3199 gdb_flush (gdb_stdout
);
3202 /* The inferior process has died. Long live the inferior! */
3205 generic_mourn_inferior (void)
3209 ptid
= inferior_ptid
;
3210 inferior_ptid
= null_ptid
;
3212 /* Mark breakpoints uninserted in case something tries to delete a
3213 breakpoint while we delete the inferior's threads (which would
3214 fail, since the inferior is long gone). */
3215 mark_breakpoints_out ();
3217 if (!ptid_equal (ptid
, null_ptid
))
3219 int pid
= ptid_get_pid (ptid
);
3220 exit_inferior (pid
);
3223 /* Note this wipes step-resume breakpoints, so needs to be done
3224 after exit_inferior, which ends up referencing the step-resume
3225 breakpoints through clear_thread_inferior_resources. */
3226 breakpoint_init_inferior (inf_exited
);
3228 registers_changed ();
3230 reopen_exec_file ();
3231 reinit_frame_cache ();
3233 if (deprecated_detach_hook
)
3234 deprecated_detach_hook ();
3237 /* Convert a normal process ID to a string. Returns the string in a
3241 normal_pid_to_str (ptid_t ptid
)
3243 static char buf
[32];
3245 xsnprintf (buf
, sizeof buf
, "process %d", ptid_get_pid (ptid
));
3250 default_pid_to_str (struct target_ops
*ops
, ptid_t ptid
)
3252 return normal_pid_to_str (ptid
);
3255 /* Error-catcher for target_find_memory_regions. */
3257 dummy_find_memory_regions (struct target_ops
*self
,
3258 find_memory_region_ftype ignore1
, void *ignore2
)
3260 error (_("Command not implemented for this target."));
3264 /* Error-catcher for target_make_corefile_notes. */
3266 dummy_make_corefile_notes (struct target_ops
*self
,
3267 bfd
*ignore1
, int *ignore2
)
3269 error (_("Command not implemented for this target."));
3273 /* Set up the handful of non-empty slots needed by the dummy target
3277 init_dummy_target (void)
3279 dummy_target
.to_shortname
= "None";
3280 dummy_target
.to_longname
= "None";
3281 dummy_target
.to_doc
= "";
3282 dummy_target
.to_supports_disable_randomization
3283 = find_default_supports_disable_randomization
;
3284 dummy_target
.to_stratum
= dummy_stratum
;
3285 dummy_target
.to_has_all_memory
= return_zero
;
3286 dummy_target
.to_has_memory
= return_zero
;
3287 dummy_target
.to_has_stack
= return_zero
;
3288 dummy_target
.to_has_registers
= return_zero
;
3289 dummy_target
.to_has_execution
= return_zero_has_execution
;
3290 dummy_target
.to_magic
= OPS_MAGIC
;
3292 install_dummy_methods (&dummy_target
);
3297 target_close (struct target_ops
*targ
)
3299 gdb_assert (!target_is_pushed (targ
));
3301 if (targ
->to_xclose
!= NULL
)
3302 targ
->to_xclose (targ
);
3303 else if (targ
->to_close
!= NULL
)
3304 targ
->to_close (targ
);
3307 fprintf_unfiltered (gdb_stdlog
, "target_close ()\n");
3311 target_thread_alive (ptid_t ptid
)
3313 return current_target
.to_thread_alive (¤t_target
, ptid
);
3317 target_update_thread_list (void)
3319 current_target
.to_update_thread_list (¤t_target
);
3323 target_stop (ptid_t ptid
)
3327 warning (_("May not interrupt or stop the target, ignoring attempt"));
3331 (*current_target
.to_stop
) (¤t_target
, ptid
);
3335 target_interrupt (ptid_t ptid
)
3339 warning (_("May not interrupt or stop the target, ignoring attempt"));
3343 (*current_target
.to_interrupt
) (¤t_target
, ptid
);
3349 target_pass_ctrlc (void)
3351 (*current_target
.to_pass_ctrlc
) (¤t_target
);
3357 default_target_pass_ctrlc (struct target_ops
*ops
)
3359 target_interrupt (inferior_ptid
);
3362 /* See target/target.h. */
3365 target_stop_and_wait (ptid_t ptid
)
3367 struct target_waitstatus status
;
3368 int was_non_stop
= non_stop
;
3373 memset (&status
, 0, sizeof (status
));
3374 target_wait (ptid
, &status
, 0);
3376 non_stop
= was_non_stop
;
3379 /* See target/target.h. */
3382 target_continue_no_signal (ptid_t ptid
)
3384 target_resume (ptid
, 0, GDB_SIGNAL_0
);
3387 /* See target/target.h. */
3390 target_continue (ptid_t ptid
, enum gdb_signal signal
)
3392 target_resume (ptid
, 0, signal
);
3395 /* Concatenate ELEM to LIST, a comma separate list, and return the
3396 result. The LIST incoming argument is released. */
3399 str_comma_list_concat_elem (char *list
, const char *elem
)
3402 return xstrdup (elem
);
3404 return reconcat (list
, list
, ", ", elem
, (char *) NULL
);
3407 /* Helper for target_options_to_string. If OPT is present in
3408 TARGET_OPTIONS, append the OPT_STR (string version of OPT) in RET.
3409 Returns the new resulting string. OPT is removed from
3413 do_option (int *target_options
, char *ret
,
3414 int opt
, const char *opt_str
)
3416 if ((*target_options
& opt
) != 0)
3418 ret
= str_comma_list_concat_elem (ret
, opt_str
);
3419 *target_options
&= ~opt
;
3426 target_options_to_string (int target_options
)
3430 #define DO_TARG_OPTION(OPT) \
3431 ret = do_option (&target_options, ret, OPT, #OPT)
3433 DO_TARG_OPTION (TARGET_WNOHANG
);
3435 if (target_options
!= 0)
3436 ret
= str_comma_list_concat_elem (ret
, "unknown???");
3444 target_fetch_registers (struct regcache
*regcache
, int regno
)
3446 current_target
.to_fetch_registers (¤t_target
, regcache
, regno
);
3448 regcache
->debug_print_register ("target_fetch_registers", regno
);
3452 target_store_registers (struct regcache
*regcache
, int regno
)
3454 if (!may_write_registers
)
3455 error (_("Writing to registers is not allowed (regno %d)"), regno
);
3457 current_target
.to_store_registers (¤t_target
, regcache
, regno
);
3460 regcache
->debug_print_register ("target_store_registers", regno
);
3465 target_core_of_thread (ptid_t ptid
)
3467 return current_target
.to_core_of_thread (¤t_target
, ptid
);
3471 simple_verify_memory (struct target_ops
*ops
,
3472 const gdb_byte
*data
, CORE_ADDR lma
, ULONGEST size
)
3474 LONGEST total_xfered
= 0;
3476 while (total_xfered
< size
)
3478 ULONGEST xfered_len
;
3479 enum target_xfer_status status
;
3481 ULONGEST howmuch
= std::min
<ULONGEST
> (sizeof (buf
), size
- total_xfered
);
3483 status
= target_xfer_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
3484 buf
, NULL
, lma
+ total_xfered
, howmuch
,
3486 if (status
== TARGET_XFER_OK
3487 && memcmp (data
+ total_xfered
, buf
, xfered_len
) == 0)
3489 total_xfered
+= xfered_len
;
3498 /* Default implementation of memory verification. */
3501 default_verify_memory (struct target_ops
*self
,
3502 const gdb_byte
*data
, CORE_ADDR memaddr
, ULONGEST size
)
3504 /* Start over from the top of the target stack. */
3505 return simple_verify_memory (current_target
.beneath
,
3506 data
, memaddr
, size
);
3510 target_verify_memory (const gdb_byte
*data
, CORE_ADDR memaddr
, ULONGEST size
)
3512 return current_target
.to_verify_memory (¤t_target
,
3513 data
, memaddr
, size
);
3516 /* The documentation for this function is in its prototype declaration in
3520 target_insert_mask_watchpoint (CORE_ADDR addr
, CORE_ADDR mask
,
3521 enum target_hw_bp_type rw
)
3523 return current_target
.to_insert_mask_watchpoint (¤t_target
,
3527 /* The documentation for this function is in its prototype declaration in
3531 target_remove_mask_watchpoint (CORE_ADDR addr
, CORE_ADDR mask
,
3532 enum target_hw_bp_type rw
)
3534 return current_target
.to_remove_mask_watchpoint (¤t_target
,
3538 /* The documentation for this function is in its prototype declaration
3542 target_masked_watch_num_registers (CORE_ADDR addr
, CORE_ADDR mask
)
3544 return current_target
.to_masked_watch_num_registers (¤t_target
,
3548 /* The documentation for this function is in its prototype declaration
3552 target_ranged_break_num_registers (void)
3554 return current_target
.to_ranged_break_num_registers (¤t_target
);
3560 target_supports_btrace (enum btrace_format format
)
3562 return current_target
.to_supports_btrace (¤t_target
, format
);
3567 struct btrace_target_info
*
3568 target_enable_btrace (ptid_t ptid
, const struct btrace_config
*conf
)
3570 return current_target
.to_enable_btrace (¤t_target
, ptid
, conf
);
3576 target_disable_btrace (struct btrace_target_info
*btinfo
)
3578 current_target
.to_disable_btrace (¤t_target
, btinfo
);
3584 target_teardown_btrace (struct btrace_target_info
*btinfo
)
3586 current_target
.to_teardown_btrace (¤t_target
, btinfo
);
3592 target_read_btrace (struct btrace_data
*btrace
,
3593 struct btrace_target_info
*btinfo
,
3594 enum btrace_read_type type
)
3596 return current_target
.to_read_btrace (¤t_target
, btrace
, btinfo
, type
);
3601 const struct btrace_config
*
3602 target_btrace_conf (const struct btrace_target_info
*btinfo
)
3604 return current_target
.to_btrace_conf (¤t_target
, btinfo
);
3610 target_stop_recording (void)
3612 current_target
.to_stop_recording (¤t_target
);
3618 target_save_record (const char *filename
)
3620 current_target
.to_save_record (¤t_target
, filename
);
3626 target_supports_delete_record (void)
3628 struct target_ops
*t
;
3630 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3631 if (t
->to_delete_record
!= delegate_delete_record
3632 && t
->to_delete_record
!= tdefault_delete_record
)
3641 target_delete_record (void)
3643 current_target
.to_delete_record (¤t_target
);
3649 target_record_method (ptid_t ptid
)
3651 return current_target
.to_record_method (¤t_target
, ptid
);
3657 target_record_is_replaying (ptid_t ptid
)
3659 return current_target
.to_record_is_replaying (¤t_target
, ptid
);
3665 target_record_will_replay (ptid_t ptid
, int dir
)
3667 return current_target
.to_record_will_replay (¤t_target
, ptid
, dir
);
3673 target_record_stop_replaying (void)
3675 current_target
.to_record_stop_replaying (¤t_target
);
3681 target_goto_record_begin (void)
3683 current_target
.to_goto_record_begin (¤t_target
);
3689 target_goto_record_end (void)
3691 current_target
.to_goto_record_end (¤t_target
);
3697 target_goto_record (ULONGEST insn
)
3699 current_target
.to_goto_record (¤t_target
, insn
);
3705 target_insn_history (int size
, gdb_disassembly_flags flags
)
3707 current_target
.to_insn_history (¤t_target
, size
, flags
);
3713 target_insn_history_from (ULONGEST from
, int size
,
3714 gdb_disassembly_flags flags
)
3716 current_target
.to_insn_history_from (¤t_target
, from
, size
, flags
);
3722 target_insn_history_range (ULONGEST begin
, ULONGEST end
,
3723 gdb_disassembly_flags flags
)
3725 current_target
.to_insn_history_range (¤t_target
, begin
, end
, flags
);
3731 target_call_history (int size
, int flags
)
3733 current_target
.to_call_history (¤t_target
, size
, flags
);
3739 target_call_history_from (ULONGEST begin
, int size
, int flags
)
3741 current_target
.to_call_history_from (¤t_target
, begin
, size
, flags
);
3747 target_call_history_range (ULONGEST begin
, ULONGEST end
, int flags
)
3749 current_target
.to_call_history_range (¤t_target
, begin
, end
, flags
);
3754 const struct frame_unwind
*
3755 target_get_unwinder (void)
3757 return current_target
.to_get_unwinder (¤t_target
);
3762 const struct frame_unwind
*
3763 target_get_tailcall_unwinder (void)
3765 return current_target
.to_get_tailcall_unwinder (¤t_target
);
3771 target_prepare_to_generate_core (void)
3773 current_target
.to_prepare_to_generate_core (¤t_target
);
3779 target_done_generating_core (void)
3781 current_target
.to_done_generating_core (¤t_target
);
3785 setup_target_debug (void)
3787 memcpy (&debug_target
, ¤t_target
, sizeof debug_target
);
3789 init_debug_target (¤t_target
);
3793 static char targ_desc
[] =
3794 "Names of targets and files being debugged.\nShows the entire \
3795 stack of targets currently in use (including the exec-file,\n\
3796 core-file, and process, if any), as well as the symbol file name.";
3799 default_rcmd (struct target_ops
*self
, const char *command
,
3800 struct ui_file
*output
)
3802 error (_("\"monitor\" command not supported by this target."));
3806 do_monitor_command (const char *cmd
, int from_tty
)
3808 target_rcmd (cmd
, gdb_stdtarg
);
3811 /* Erases all the memory regions marked as flash. CMD and FROM_TTY are
3815 flash_erase_command (const char *cmd
, int from_tty
)
3817 /* Used to communicate termination of flash operations to the target. */
3818 bool found_flash_region
= false;
3819 struct gdbarch
*gdbarch
= target_gdbarch ();
3821 std::vector
<mem_region
> mem_regions
= target_memory_map ();
3823 /* Iterate over all memory regions. */
3824 for (const mem_region
&m
: mem_regions
)
3826 /* Is this a flash memory region? */
3827 if (m
.attrib
.mode
== MEM_FLASH
)
3829 found_flash_region
= true;
3830 target_flash_erase (m
.lo
, m
.hi
- m
.lo
);
3832 ui_out_emit_tuple
tuple_emitter (current_uiout
, "erased-regions");
3834 current_uiout
->message (_("Erasing flash memory region at address "));
3835 current_uiout
->field_fmt ("address", "%s", paddress (gdbarch
, m
.lo
));
3836 current_uiout
->message (", size = ");
3837 current_uiout
->field_fmt ("size", "%s", hex_string (m
.hi
- m
.lo
));
3838 current_uiout
->message ("\n");
3842 /* Did we do any flash operations? If so, we need to finalize them. */
3843 if (found_flash_region
)
3844 target_flash_done ();
3846 current_uiout
->message (_("No flash memory regions found.\n"));
3849 /* Print the name of each layers of our target stack. */
3852 maintenance_print_target_stack (const char *cmd
, int from_tty
)
3854 struct target_ops
*t
;
3856 printf_filtered (_("The current target stack is:\n"));
3858 for (t
= target_stack
; t
!= NULL
; t
= t
->beneath
)
3860 printf_filtered (" - %s (%s)\n", t
->to_shortname
, t
->to_longname
);
3867 target_async (int enable
)
3869 infrun_async (enable
);
3870 current_target
.to_async (¤t_target
, enable
);
3876 target_thread_events (int enable
)
3878 current_target
.to_thread_events (¤t_target
, enable
);
3881 /* Controls if targets can report that they can/are async. This is
3882 just for maintainers to use when debugging gdb. */
3883 int target_async_permitted
= 1;
3885 /* The set command writes to this variable. If the inferior is
3886 executing, target_async_permitted is *not* updated. */
3887 static int target_async_permitted_1
= 1;
3890 maint_set_target_async_command (const char *args
, int from_tty
,
3891 struct cmd_list_element
*c
)
3893 if (have_live_inferiors ())
3895 target_async_permitted_1
= target_async_permitted
;
3896 error (_("Cannot change this setting while the inferior is running."));
3899 target_async_permitted
= target_async_permitted_1
;
3903 maint_show_target_async_command (struct ui_file
*file
, int from_tty
,
3904 struct cmd_list_element
*c
,
3907 fprintf_filtered (file
,
3908 _("Controlling the inferior in "
3909 "asynchronous mode is %s.\n"), value
);
3912 /* Return true if the target operates in non-stop mode even with "set
3916 target_always_non_stop_p (void)
3918 return current_target
.to_always_non_stop_p (¤t_target
);
3924 target_is_non_stop_p (void)
3927 || target_non_stop_enabled
== AUTO_BOOLEAN_TRUE
3928 || (target_non_stop_enabled
== AUTO_BOOLEAN_AUTO
3929 && target_always_non_stop_p ()));
3932 /* Controls if targets can report that they always run in non-stop
3933 mode. This is just for maintainers to use when debugging gdb. */
3934 enum auto_boolean target_non_stop_enabled
= AUTO_BOOLEAN_AUTO
;
3936 /* The set command writes to this variable. If the inferior is
3937 executing, target_non_stop_enabled is *not* updated. */
3938 static enum auto_boolean target_non_stop_enabled_1
= AUTO_BOOLEAN_AUTO
;
3940 /* Implementation of "maint set target-non-stop". */
3943 maint_set_target_non_stop_command (const char *args
, int from_tty
,
3944 struct cmd_list_element
*c
)
3946 if (have_live_inferiors ())
3948 target_non_stop_enabled_1
= target_non_stop_enabled
;
3949 error (_("Cannot change this setting while the inferior is running."));
3952 target_non_stop_enabled
= target_non_stop_enabled_1
;
3955 /* Implementation of "maint show target-non-stop". */
3958 maint_show_target_non_stop_command (struct ui_file
*file
, int from_tty
,
3959 struct cmd_list_element
*c
,
3962 if (target_non_stop_enabled
== AUTO_BOOLEAN_AUTO
)
3963 fprintf_filtered (file
,
3964 _("Whether the target is always in non-stop mode "
3965 "is %s (currently %s).\n"), value
,
3966 target_always_non_stop_p () ? "on" : "off");
3968 fprintf_filtered (file
,
3969 _("Whether the target is always in non-stop mode "
3970 "is %s.\n"), value
);
3973 /* Temporary copies of permission settings. */
3975 static int may_write_registers_1
= 1;
3976 static int may_write_memory_1
= 1;
3977 static int may_insert_breakpoints_1
= 1;
3978 static int may_insert_tracepoints_1
= 1;
3979 static int may_insert_fast_tracepoints_1
= 1;
3980 static int may_stop_1
= 1;
3982 /* Make the user-set values match the real values again. */
3985 update_target_permissions (void)
3987 may_write_registers_1
= may_write_registers
;
3988 may_write_memory_1
= may_write_memory
;
3989 may_insert_breakpoints_1
= may_insert_breakpoints
;
3990 may_insert_tracepoints_1
= may_insert_tracepoints
;
3991 may_insert_fast_tracepoints_1
= may_insert_fast_tracepoints
;
3992 may_stop_1
= may_stop
;
3995 /* The one function handles (most of) the permission flags in the same
3999 set_target_permissions (const char *args
, int from_tty
,
4000 struct cmd_list_element
*c
)
4002 if (target_has_execution
)
4004 update_target_permissions ();
4005 error (_("Cannot change this setting while the inferior is running."));
4008 /* Make the real values match the user-changed values. */
4009 may_write_registers
= may_write_registers_1
;
4010 may_insert_breakpoints
= may_insert_breakpoints_1
;
4011 may_insert_tracepoints
= may_insert_tracepoints_1
;
4012 may_insert_fast_tracepoints
= may_insert_fast_tracepoints_1
;
4013 may_stop
= may_stop_1
;
4014 update_observer_mode ();
4017 /* Set memory write permission independently of observer mode. */
4020 set_write_memory_permission (const char *args
, int from_tty
,
4021 struct cmd_list_element
*c
)
4023 /* Make the real values match the user-changed values. */
4024 may_write_memory
= may_write_memory_1
;
4025 update_observer_mode ();
4029 namespace selftests
{
4032 test_target_has_registers (target_ops
*self
)
4038 test_target_has_stack (target_ops
*self
)
4044 test_target_has_memory (target_ops
*self
)
4050 test_target_prepare_to_store (target_ops
*self
, regcache
*regs
)
4055 test_target_store_registers (target_ops
*self
, regcache
*regs
, int regno
)
4059 test_target_ops::test_target_ops ()
4062 to_magic
= OPS_MAGIC
;
4063 to_stratum
= process_stratum
;
4064 to_has_memory
= test_target_has_memory
;
4065 to_has_stack
= test_target_has_stack
;
4066 to_has_registers
= test_target_has_registers
;
4067 to_prepare_to_store
= test_target_prepare_to_store
;
4068 to_store_registers
= test_target_store_registers
;
4070 complete_target_initialization (this);
4073 } // namespace selftests
4074 #endif /* GDB_SELF_TEST */
4077 initialize_targets (void)
4079 init_dummy_target ();
4080 push_target (&dummy_target
);
4082 add_info ("target", info_target_command
, targ_desc
);
4083 add_info ("files", info_target_command
, targ_desc
);
4085 add_setshow_zuinteger_cmd ("target", class_maintenance
, &targetdebug
, _("\
4086 Set target debugging."), _("\
4087 Show target debugging."), _("\
4088 When non-zero, target debugging is enabled. Higher numbers are more\n\
4092 &setdebuglist
, &showdebuglist
);
4094 add_setshow_boolean_cmd ("trust-readonly-sections", class_support
,
4095 &trust_readonly
, _("\
4096 Set mode for reading from readonly sections."), _("\
4097 Show mode for reading from readonly sections."), _("\
4098 When this mode is on, memory reads from readonly sections (such as .text)\n\
4099 will be read from the object file instead of from the target. This will\n\
4100 result in significant performance improvement for remote targets."),
4102 show_trust_readonly
,
4103 &setlist
, &showlist
);
4105 add_com ("monitor", class_obscure
, do_monitor_command
,
4106 _("Send a command to the remote monitor (remote targets only)."));
4108 add_cmd ("target-stack", class_maintenance
, maintenance_print_target_stack
,
4109 _("Print the name of each layer of the internal target stack."),
4110 &maintenanceprintlist
);
4112 add_setshow_boolean_cmd ("target-async", no_class
,
4113 &target_async_permitted_1
, _("\
4114 Set whether gdb controls the inferior in asynchronous mode."), _("\
4115 Show whether gdb controls the inferior in asynchronous mode."), _("\
4116 Tells gdb whether to control the inferior in asynchronous mode."),
4117 maint_set_target_async_command
,
4118 maint_show_target_async_command
,
4119 &maintenance_set_cmdlist
,
4120 &maintenance_show_cmdlist
);
4122 add_setshow_auto_boolean_cmd ("target-non-stop", no_class
,
4123 &target_non_stop_enabled_1
, _("\
4124 Set whether gdb always controls the inferior in non-stop mode."), _("\
4125 Show whether gdb always controls the inferior in non-stop mode."), _("\
4126 Tells gdb whether to control the inferior in non-stop mode."),
4127 maint_set_target_non_stop_command
,
4128 maint_show_target_non_stop_command
,
4129 &maintenance_set_cmdlist
,
4130 &maintenance_show_cmdlist
);
4132 add_setshow_boolean_cmd ("may-write-registers", class_support
,
4133 &may_write_registers_1
, _("\
4134 Set permission to write into registers."), _("\
4135 Show permission to write into registers."), _("\
4136 When this permission is on, GDB may write into the target's registers.\n\
4137 Otherwise, any sort of write attempt will result in an error."),
4138 set_target_permissions
, NULL
,
4139 &setlist
, &showlist
);
4141 add_setshow_boolean_cmd ("may-write-memory", class_support
,
4142 &may_write_memory_1
, _("\
4143 Set permission to write into target memory."), _("\
4144 Show permission to write into target memory."), _("\
4145 When this permission is on, GDB may write into the target's memory.\n\
4146 Otherwise, any sort of write attempt will result in an error."),
4147 set_write_memory_permission
, NULL
,
4148 &setlist
, &showlist
);
4150 add_setshow_boolean_cmd ("may-insert-breakpoints", class_support
,
4151 &may_insert_breakpoints_1
, _("\
4152 Set permission to insert breakpoints in the target."), _("\
4153 Show permission to insert breakpoints in the target."), _("\
4154 When this permission is on, GDB may insert breakpoints in the program.\n\
4155 Otherwise, any sort of insertion attempt will result in an error."),
4156 set_target_permissions
, NULL
,
4157 &setlist
, &showlist
);
4159 add_setshow_boolean_cmd ("may-insert-tracepoints", class_support
,
4160 &may_insert_tracepoints_1
, _("\
4161 Set permission to insert tracepoints in the target."), _("\
4162 Show permission to insert tracepoints in the target."), _("\
4163 When this permission is on, GDB may insert tracepoints in the program.\n\
4164 Otherwise, any sort of insertion attempt will result in an error."),
4165 set_target_permissions
, NULL
,
4166 &setlist
, &showlist
);
4168 add_setshow_boolean_cmd ("may-insert-fast-tracepoints", class_support
,
4169 &may_insert_fast_tracepoints_1
, _("\
4170 Set permission to insert fast tracepoints in the target."), _("\
4171 Show permission to insert fast tracepoints in the target."), _("\
4172 When this permission is on, GDB may insert fast tracepoints.\n\
4173 Otherwise, any sort of insertion attempt will result in an error."),
4174 set_target_permissions
, NULL
,
4175 &setlist
, &showlist
);
4177 add_setshow_boolean_cmd ("may-interrupt", class_support
,
4179 Set permission to interrupt or signal the target."), _("\
4180 Show permission to interrupt or signal the target."), _("\
4181 When this permission is on, GDB may interrupt/stop the target's execution.\n\
4182 Otherwise, any attempt to interrupt or stop will be ignored."),
4183 set_target_permissions
, NULL
,
4184 &setlist
, &showlist
);
4186 add_com ("flash-erase", no_class
, flash_erase_command
,
4187 _("Erase all flash memory regions."));
4189 add_setshow_boolean_cmd ("auto-connect-native-target", class_support
,
4190 &auto_connect_native_target
, _("\
4191 Set whether GDB may automatically connect to the native target."), _("\
4192 Show whether GDB may automatically connect to the native target."), _("\
4193 When on, and GDB is not connected to a target yet, GDB\n\
4194 attempts \"run\" and other commands with the native target."),
4195 NULL
, show_auto_connect_native_target
,
4196 &setlist
, &showlist
);