1 /* Select target systems and architectures at runtime for GDB.
3 Copyright (C) 1990-2016 Free Software Foundation, Inc.
5 Contributed by Cygnus Support.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
24 #include "target-dcache.h"
36 #include "target-descriptions.h"
37 #include "gdbthread.h"
40 #include "inline-frame.h"
41 #include "tracepoint.h"
42 #include "gdb/fileio.h"
45 #include "target-debug.h"
47 static void target_info (char *, int);
49 static void generic_tls_error (void) ATTRIBUTE_NORETURN
;
51 static void default_terminal_info (struct target_ops
*, const char *, int);
53 static int default_watchpoint_addr_within_range (struct target_ops
*,
54 CORE_ADDR
, CORE_ADDR
, int);
56 static int default_region_ok_for_hw_watchpoint (struct target_ops
*,
59 static void default_rcmd (struct target_ops
*, const char *, struct ui_file
*);
61 static ptid_t
default_get_ada_task_ptid (struct target_ops
*self
,
64 static int default_follow_fork (struct target_ops
*self
, int follow_child
,
67 static void default_mourn_inferior (struct target_ops
*self
);
69 static int default_search_memory (struct target_ops
*ops
,
71 ULONGEST search_space_len
,
72 const gdb_byte
*pattern
,
74 CORE_ADDR
*found_addrp
);
76 static int default_verify_memory (struct target_ops
*self
,
78 CORE_ADDR memaddr
, ULONGEST size
);
80 static struct address_space
*default_thread_address_space
81 (struct target_ops
*self
, ptid_t ptid
);
83 static void tcomplain (void) ATTRIBUTE_NORETURN
;
85 static int return_zero (struct target_ops
*);
87 static int return_zero_has_execution (struct target_ops
*, ptid_t
);
89 static void target_command (char *, int);
91 static struct target_ops
*find_default_run_target (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 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 (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 (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 (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
, NULL
, 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
, 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
, NULL
, 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
);
432 /* Possible terminal states. */
436 /* The inferior's terminal settings are in effect. */
437 terminal_is_inferior
= 0,
439 /* Some of our terminal settings are in effect, enough to get
441 terminal_is_ours_for_output
= 1,
443 /* Our terminal settings are in effect, for output and input. */
447 static enum terminal_state terminal_state
= terminal_is_ours
;
452 target_terminal_init (void)
454 (*current_target
.to_terminal_init
) (¤t_target
);
456 terminal_state
= terminal_is_ours
;
462 target_terminal_is_inferior (void)
464 return (terminal_state
== terminal_is_inferior
);
470 target_terminal_is_ours (void)
472 return (terminal_state
== terminal_is_ours
);
478 target_terminal_inferior (void)
480 /* A background resume (``run&'') should leave GDB in control of the
481 terminal. Use target_can_async_p, not target_is_async_p, since at
482 this point the target is not async yet. However, if sync_execution
483 is not set, we know it will become async prior to resume. */
484 if (target_can_async_p () && !sync_execution
)
487 if (terminal_state
== terminal_is_inferior
)
490 /* If GDB is resuming the inferior in the foreground, install
491 inferior's terminal modes. */
492 (*current_target
.to_terminal_inferior
) (¤t_target
);
493 terminal_state
= terminal_is_inferior
;
499 target_terminal_ours (void)
501 if (terminal_state
== terminal_is_ours
)
504 (*current_target
.to_terminal_ours
) (¤t_target
);
505 terminal_state
= terminal_is_ours
;
511 target_terminal_ours_for_output (void)
513 if (terminal_state
!= terminal_is_inferior
)
515 (*current_target
.to_terminal_ours_for_output
) (¤t_target
);
516 terminal_state
= terminal_is_ours_for_output
;
522 target_supports_terminal_ours (void)
524 struct target_ops
*t
;
526 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
528 if (t
->to_terminal_ours
!= delegate_terminal_ours
529 && t
->to_terminal_ours
!= tdefault_terminal_ours
)
536 /* Restore the terminal to its previous state (helper for
537 make_cleanup_restore_target_terminal). */
540 cleanup_restore_target_terminal (void *arg
)
542 enum terminal_state
*previous_state
= (enum terminal_state
*) arg
;
544 switch (*previous_state
)
546 case terminal_is_ours
:
547 target_terminal_ours ();
549 case terminal_is_ours_for_output
:
550 target_terminal_ours_for_output ();
552 case terminal_is_inferior
:
553 target_terminal_inferior ();
561 make_cleanup_restore_target_terminal (void)
563 enum terminal_state
*ts
= XNEW (enum terminal_state
);
565 *ts
= terminal_state
;
567 return make_cleanup_dtor (cleanup_restore_target_terminal
, ts
, xfree
);
573 error (_("You can't do that when your target is `%s'"),
574 current_target
.to_shortname
);
580 error (_("You can't do that without a process to debug."));
584 default_terminal_info (struct target_ops
*self
, const char *args
, int from_tty
)
586 printf_unfiltered (_("No saved terminal information.\n"));
589 /* A default implementation for the to_get_ada_task_ptid target method.
591 This function builds the PTID by using both LWP and TID as part of
592 the PTID lwp and tid elements. The pid used is the pid of the
596 default_get_ada_task_ptid (struct target_ops
*self
, long lwp
, long tid
)
598 return ptid_build (ptid_get_pid (inferior_ptid
), lwp
, tid
);
601 static enum exec_direction_kind
602 default_execution_direction (struct target_ops
*self
)
604 if (!target_can_execute_reverse
)
606 else if (!target_can_async_p ())
609 gdb_assert_not_reached ("\
610 to_execution_direction must be implemented for reverse async");
613 /* Go through the target stack from top to bottom, copying over zero
614 entries in current_target, then filling in still empty entries. In
615 effect, we are doing class inheritance through the pushed target
618 NOTE: cagney/2003-10-17: The problem with this inheritance, as it
619 is currently implemented, is that it discards any knowledge of
620 which target an inherited method originally belonged to.
621 Consequently, new new target methods should instead explicitly and
622 locally search the target stack for the target that can handle the
626 update_current_target (void)
628 struct target_ops
*t
;
630 /* First, reset current's contents. */
631 memset (¤t_target
, 0, sizeof (current_target
));
633 /* Install the delegators. */
634 install_delegators (¤t_target
);
636 current_target
.to_stratum
= target_stack
->to_stratum
;
638 #define INHERIT(FIELD, TARGET) \
639 if (!current_target.FIELD) \
640 current_target.FIELD = (TARGET)->FIELD
642 /* Do not add any new INHERITs here. Instead, use the delegation
643 mechanism provided by make-target-delegates. */
644 for (t
= target_stack
; t
; t
= t
->beneath
)
646 INHERIT (to_shortname
, t
);
647 INHERIT (to_longname
, t
);
648 INHERIT (to_attach_no_wait
, t
);
649 INHERIT (to_have_steppable_watchpoint
, t
);
650 INHERIT (to_have_continuable_watchpoint
, t
);
651 INHERIT (to_has_thread_control
, t
);
655 /* Finally, position the target-stack beneath the squashed
656 "current_target". That way code looking for a non-inherited
657 target method can quickly and simply find it. */
658 current_target
.beneath
= target_stack
;
661 setup_target_debug ();
664 /* Push a new target type into the stack of the existing target accessors,
665 possibly superseding some of the existing accessors.
667 Rather than allow an empty stack, we always have the dummy target at
668 the bottom stratum, so we can call the function vectors without
672 push_target (struct target_ops
*t
)
674 struct target_ops
**cur
;
676 /* Check magic number. If wrong, it probably means someone changed
677 the struct definition, but not all the places that initialize one. */
678 if (t
->to_magic
!= OPS_MAGIC
)
680 fprintf_unfiltered (gdb_stderr
,
681 "Magic number of %s target struct wrong\n",
683 internal_error (__FILE__
, __LINE__
,
684 _("failed internal consistency check"));
687 /* Find the proper stratum to install this target in. */
688 for (cur
= &target_stack
; (*cur
) != NULL
; cur
= &(*cur
)->beneath
)
690 if ((int) (t
->to_stratum
) >= (int) (*cur
)->to_stratum
)
694 /* If there's already targets at this stratum, remove them. */
695 /* FIXME: cagney/2003-10-15: I think this should be popping all
696 targets to CUR, and not just those at this stratum level. */
697 while ((*cur
) != NULL
&& t
->to_stratum
== (*cur
)->to_stratum
)
699 /* There's already something at this stratum level. Close it,
700 and un-hook it from the stack. */
701 struct target_ops
*tmp
= (*cur
);
703 (*cur
) = (*cur
)->beneath
;
708 /* We have removed all targets in our stratum, now add the new one. */
712 update_current_target ();
715 /* Remove a target_ops vector from the stack, wherever it may be.
716 Return how many times it was removed (0 or 1). */
719 unpush_target (struct target_ops
*t
)
721 struct target_ops
**cur
;
722 struct target_ops
*tmp
;
724 if (t
->to_stratum
== dummy_stratum
)
725 internal_error (__FILE__
, __LINE__
,
726 _("Attempt to unpush the dummy target"));
728 /* Look for the specified target. Note that we assume that a target
729 can only occur once in the target stack. */
731 for (cur
= &target_stack
; (*cur
) != NULL
; cur
= &(*cur
)->beneath
)
737 /* If we don't find target_ops, quit. Only open targets should be
742 /* Unchain the target. */
744 (*cur
) = (*cur
)->beneath
;
747 update_current_target ();
749 /* Finally close the target. Note we do this after unchaining, so
750 any target method calls from within the target_close
751 implementation don't end up in T anymore. */
757 /* Unpush TARGET and assert that it worked. */
760 unpush_target_and_assert (struct target_ops
*target
)
762 if (!unpush_target (target
))
764 fprintf_unfiltered (gdb_stderr
,
765 "pop_all_targets couldn't find target %s\n",
766 target
->to_shortname
);
767 internal_error (__FILE__
, __LINE__
,
768 _("failed internal consistency check"));
773 pop_all_targets_above (enum strata above_stratum
)
775 while ((int) (current_target
.to_stratum
) > (int) above_stratum
)
776 unpush_target_and_assert (target_stack
);
782 pop_all_targets_at_and_above (enum strata stratum
)
784 while ((int) (current_target
.to_stratum
) >= (int) stratum
)
785 unpush_target_and_assert (target_stack
);
789 pop_all_targets (void)
791 pop_all_targets_above (dummy_stratum
);
794 /* Return 1 if T is now pushed in the target stack. Return 0 otherwise. */
797 target_is_pushed (struct target_ops
*t
)
799 struct target_ops
*cur
;
801 /* Check magic number. If wrong, it probably means someone changed
802 the struct definition, but not all the places that initialize one. */
803 if (t
->to_magic
!= OPS_MAGIC
)
805 fprintf_unfiltered (gdb_stderr
,
806 "Magic number of %s target struct wrong\n",
808 internal_error (__FILE__
, __LINE__
,
809 _("failed internal consistency check"));
812 for (cur
= target_stack
; cur
!= NULL
; cur
= cur
->beneath
)
819 /* Default implementation of to_get_thread_local_address. */
822 generic_tls_error (void)
824 throw_error (TLS_GENERIC_ERROR
,
825 _("Cannot find thread-local variables on this target"));
828 /* Using the objfile specified in OBJFILE, find the address for the
829 current thread's thread-local storage with offset OFFSET. */
831 target_translate_tls_address (struct objfile
*objfile
, CORE_ADDR offset
)
833 volatile CORE_ADDR addr
= 0;
834 struct target_ops
*target
= ¤t_target
;
836 if (gdbarch_fetch_tls_load_module_address_p (target_gdbarch ()))
838 ptid_t ptid
= inferior_ptid
;
844 /* Fetch the load module address for this objfile. */
845 lm_addr
= gdbarch_fetch_tls_load_module_address (target_gdbarch (),
848 addr
= target
->to_get_thread_local_address (target
, ptid
,
851 /* If an error occurred, print TLS related messages here. Otherwise,
852 throw the error to some higher catcher. */
853 CATCH (ex
, RETURN_MASK_ALL
)
855 int objfile_is_library
= (objfile
->flags
& OBJF_SHARED
);
859 case TLS_NO_LIBRARY_SUPPORT_ERROR
:
860 error (_("Cannot find thread-local variables "
861 "in this thread library."));
863 case TLS_LOAD_MODULE_NOT_FOUND_ERROR
:
864 if (objfile_is_library
)
865 error (_("Cannot find shared library `%s' in dynamic"
866 " linker's load module list"), objfile_name (objfile
));
868 error (_("Cannot find executable file `%s' in dynamic"
869 " linker's load module list"), objfile_name (objfile
));
871 case TLS_NOT_ALLOCATED_YET_ERROR
:
872 if (objfile_is_library
)
873 error (_("The inferior has not yet allocated storage for"
874 " thread-local variables in\n"
875 "the shared library `%s'\n"
877 objfile_name (objfile
), target_pid_to_str (ptid
));
879 error (_("The inferior has not yet allocated storage for"
880 " thread-local variables in\n"
881 "the executable `%s'\n"
883 objfile_name (objfile
), target_pid_to_str (ptid
));
885 case TLS_GENERIC_ERROR
:
886 if (objfile_is_library
)
887 error (_("Cannot find thread-local storage for %s, "
888 "shared library %s:\n%s"),
889 target_pid_to_str (ptid
),
890 objfile_name (objfile
), ex
.message
);
892 error (_("Cannot find thread-local storage for %s, "
893 "executable file %s:\n%s"),
894 target_pid_to_str (ptid
),
895 objfile_name (objfile
), ex
.message
);
898 throw_exception (ex
);
904 /* It wouldn't be wrong here to try a gdbarch method, too; finding
905 TLS is an ABI-specific thing. But we don't do that yet. */
907 error (_("Cannot find thread-local variables on this target"));
913 target_xfer_status_to_string (enum target_xfer_status status
)
915 #define CASE(X) case X: return #X
918 CASE(TARGET_XFER_E_IO
);
919 CASE(TARGET_XFER_UNAVAILABLE
);
928 #define MIN(A, B) (((A) <= (B)) ? (A) : (B))
930 /* target_read_string -- read a null terminated string, up to LEN bytes,
931 from MEMADDR in target. Set *ERRNOP to the errno code, or 0 if successful.
932 Set *STRING to a pointer to malloc'd memory containing the data; the caller
933 is responsible for freeing it. Return the number of bytes successfully
937 target_read_string (CORE_ADDR memaddr
, char **string
, int len
, int *errnop
)
943 int buffer_allocated
;
945 unsigned int nbytes_read
= 0;
949 /* Small for testing. */
950 buffer_allocated
= 4;
951 buffer
= (char *) xmalloc (buffer_allocated
);
956 tlen
= MIN (len
, 4 - (memaddr
& 3));
957 offset
= memaddr
& 3;
959 errcode
= target_read_memory (memaddr
& ~3, buf
, sizeof buf
);
962 /* The transfer request might have crossed the boundary to an
963 unallocated region of memory. Retry the transfer, requesting
967 errcode
= target_read_memory (memaddr
, buf
, 1);
972 if (bufptr
- buffer
+ tlen
> buffer_allocated
)
976 bytes
= bufptr
- buffer
;
977 buffer_allocated
*= 2;
978 buffer
= (char *) xrealloc (buffer
, buffer_allocated
);
979 bufptr
= buffer
+ bytes
;
982 for (i
= 0; i
< tlen
; i
++)
984 *bufptr
++ = buf
[i
+ offset
];
985 if (buf
[i
+ offset
] == '\000')
987 nbytes_read
+= i
+ 1;
1003 struct target_section_table
*
1004 target_get_section_table (struct target_ops
*target
)
1006 return (*target
->to_get_section_table
) (target
);
1009 /* Find a section containing ADDR. */
1011 struct target_section
*
1012 target_section_by_addr (struct target_ops
*target
, CORE_ADDR addr
)
1014 struct target_section_table
*table
= target_get_section_table (target
);
1015 struct target_section
*secp
;
1020 for (secp
= table
->sections
; secp
< table
->sections_end
; secp
++)
1022 if (addr
>= secp
->addr
&& addr
< secp
->endaddr
)
1029 /* Helper for the memory xfer routines. Checks the attributes of the
1030 memory region of MEMADDR against the read or write being attempted.
1031 If the access is permitted returns true, otherwise returns false.
1032 REGION_P is an optional output parameter. If not-NULL, it is
1033 filled with a pointer to the memory region of MEMADDR. REG_LEN
1034 returns LEN trimmed to the end of the region. This is how much the
1035 caller can continue requesting, if the access is permitted. A
1036 single xfer request must not straddle memory region boundaries. */
1039 memory_xfer_check_region (gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1040 ULONGEST memaddr
, ULONGEST len
, ULONGEST
*reg_len
,
1041 struct mem_region
**region_p
)
1043 struct mem_region
*region
;
1045 region
= lookup_mem_region (memaddr
);
1047 if (region_p
!= NULL
)
1050 switch (region
->attrib
.mode
)
1053 if (writebuf
!= NULL
)
1058 if (readbuf
!= NULL
)
1063 /* We only support writing to flash during "load" for now. */
1064 if (writebuf
!= NULL
)
1065 error (_("Writing to flash memory forbidden in this context"));
1072 /* region->hi == 0 means there's no upper bound. */
1073 if (memaddr
+ len
< region
->hi
|| region
->hi
== 0)
1076 *reg_len
= region
->hi
- memaddr
;
1081 /* Read memory from more than one valid target. A core file, for
1082 instance, could have some of memory but delegate other bits to
1083 the target below it. So, we must manually try all targets. */
1085 enum target_xfer_status
1086 raw_memory_xfer_partial (struct target_ops
*ops
, gdb_byte
*readbuf
,
1087 const gdb_byte
*writebuf
, ULONGEST memaddr
, LONGEST len
,
1088 ULONGEST
*xfered_len
)
1090 enum target_xfer_status res
;
1094 res
= ops
->to_xfer_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1095 readbuf
, writebuf
, memaddr
, len
,
1097 if (res
== TARGET_XFER_OK
)
1100 /* Stop if the target reports that the memory is not available. */
1101 if (res
== TARGET_XFER_UNAVAILABLE
)
1104 /* We want to continue past core files to executables, but not
1105 past a running target's memory. */
1106 if (ops
->to_has_all_memory (ops
))
1111 while (ops
!= NULL
);
1113 /* The cache works at the raw memory level. Make sure the cache
1114 gets updated with raw contents no matter what kind of memory
1115 object was originally being written. Note we do write-through
1116 first, so that if it fails, we don't write to the cache contents
1117 that never made it to the target. */
1118 if (writebuf
!= NULL
1119 && !ptid_equal (inferior_ptid
, null_ptid
)
1120 && target_dcache_init_p ()
1121 && (stack_cache_enabled_p () || code_cache_enabled_p ()))
1123 DCACHE
*dcache
= target_dcache_get ();
1125 /* Note that writing to an area of memory which wasn't present
1126 in the cache doesn't cause it to be loaded in. */
1127 dcache_update (dcache
, res
, memaddr
, writebuf
, *xfered_len
);
1133 /* Perform a partial memory transfer.
1134 For docs see target.h, to_xfer_partial. */
1136 static enum target_xfer_status
1137 memory_xfer_partial_1 (struct target_ops
*ops
, enum target_object object
,
1138 gdb_byte
*readbuf
, const gdb_byte
*writebuf
, ULONGEST memaddr
,
1139 ULONGEST len
, ULONGEST
*xfered_len
)
1141 enum target_xfer_status res
;
1143 struct mem_region
*region
;
1144 struct inferior
*inf
;
1146 /* For accesses to unmapped overlay sections, read directly from
1147 files. Must do this first, as MEMADDR may need adjustment. */
1148 if (readbuf
!= NULL
&& overlay_debugging
)
1150 struct obj_section
*section
= find_pc_overlay (memaddr
);
1152 if (pc_in_unmapped_range (memaddr
, section
))
1154 struct target_section_table
*table
1155 = target_get_section_table (ops
);
1156 const char *section_name
= section
->the_bfd_section
->name
;
1158 memaddr
= overlay_mapped_address (memaddr
, section
);
1159 return section_table_xfer_memory_partial (readbuf
, writebuf
,
1160 memaddr
, len
, xfered_len
,
1162 table
->sections_end
,
1167 /* Try the executable files, if "trust-readonly-sections" is set. */
1168 if (readbuf
!= NULL
&& trust_readonly
)
1170 struct target_section
*secp
;
1171 struct target_section_table
*table
;
1173 secp
= target_section_by_addr (ops
, memaddr
);
1175 && (bfd_get_section_flags (secp
->the_bfd_section
->owner
,
1176 secp
->the_bfd_section
)
1179 table
= target_get_section_table (ops
);
1180 return section_table_xfer_memory_partial (readbuf
, writebuf
,
1181 memaddr
, len
, xfered_len
,
1183 table
->sections_end
,
1188 /* Try GDB's internal data cache. */
1190 if (!memory_xfer_check_region (readbuf
, writebuf
, memaddr
, len
, ®_len
,
1192 return TARGET_XFER_E_IO
;
1194 if (!ptid_equal (inferior_ptid
, null_ptid
))
1195 inf
= find_inferior_ptid (inferior_ptid
);
1201 /* The dcache reads whole cache lines; that doesn't play well
1202 with reading from a trace buffer, because reading outside of
1203 the collected memory range fails. */
1204 && get_traceframe_number () == -1
1205 && (region
->attrib
.cache
1206 || (stack_cache_enabled_p () && object
== TARGET_OBJECT_STACK_MEMORY
)
1207 || (code_cache_enabled_p () && object
== TARGET_OBJECT_CODE_MEMORY
)))
1209 DCACHE
*dcache
= target_dcache_get_or_init ();
1211 return dcache_read_memory_partial (ops
, dcache
, memaddr
, readbuf
,
1212 reg_len
, xfered_len
);
1215 /* If none of those methods found the memory we wanted, fall back
1216 to a target partial transfer. Normally a single call to
1217 to_xfer_partial is enough; if it doesn't recognize an object
1218 it will call the to_xfer_partial of the next target down.
1219 But for memory this won't do. Memory is the only target
1220 object which can be read from more than one valid target.
1221 A core file, for instance, could have some of memory but
1222 delegate other bits to the target below it. So, we must
1223 manually try all targets. */
1225 res
= raw_memory_xfer_partial (ops
, readbuf
, writebuf
, memaddr
, reg_len
,
1228 /* If we still haven't got anything, return the last error. We
1233 /* Perform a partial memory transfer. For docs see target.h,
1236 static enum target_xfer_status
1237 memory_xfer_partial (struct target_ops
*ops
, enum target_object object
,
1238 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1239 ULONGEST memaddr
, ULONGEST len
, ULONGEST
*xfered_len
)
1241 enum target_xfer_status res
;
1243 /* Zero length requests are ok and require no work. */
1245 return TARGET_XFER_EOF
;
1247 /* Fill in READBUF with breakpoint shadows, or WRITEBUF with
1248 breakpoint insns, thus hiding out from higher layers whether
1249 there are software breakpoints inserted in the code stream. */
1250 if (readbuf
!= NULL
)
1252 res
= memory_xfer_partial_1 (ops
, object
, readbuf
, NULL
, memaddr
, len
,
1255 if (res
== TARGET_XFER_OK
&& !show_memory_breakpoints
)
1256 breakpoint_xfer_memory (readbuf
, NULL
, NULL
, memaddr
, *xfered_len
);
1261 struct cleanup
*old_chain
;
1263 /* A large write request is likely to be partially satisfied
1264 by memory_xfer_partial_1. We will continually malloc
1265 and free a copy of the entire write request for breakpoint
1266 shadow handling even though we only end up writing a small
1267 subset of it. Cap writes to 4KB to mitigate this. */
1268 len
= min (4096, len
);
1270 buf
= (gdb_byte
*) xmalloc (len
);
1271 old_chain
= make_cleanup (xfree
, buf
);
1272 memcpy (buf
, writebuf
, len
);
1274 breakpoint_xfer_memory (NULL
, buf
, writebuf
, memaddr
, len
);
1275 res
= memory_xfer_partial_1 (ops
, object
, NULL
, buf
, memaddr
, len
,
1278 do_cleanups (old_chain
);
1285 restore_show_memory_breakpoints (void *arg
)
1287 show_memory_breakpoints
= (uintptr_t) arg
;
1291 make_show_memory_breakpoints_cleanup (int show
)
1293 int current
= show_memory_breakpoints
;
1295 show_memory_breakpoints
= show
;
1296 return make_cleanup (restore_show_memory_breakpoints
,
1297 (void *) (uintptr_t) current
);
1300 /* For docs see target.h, to_xfer_partial. */
1302 enum target_xfer_status
1303 target_xfer_partial (struct target_ops
*ops
,
1304 enum target_object object
, const char *annex
,
1305 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1306 ULONGEST offset
, ULONGEST len
,
1307 ULONGEST
*xfered_len
)
1309 enum target_xfer_status retval
;
1311 gdb_assert (ops
->to_xfer_partial
!= NULL
);
1313 /* Transfer is done when LEN is zero. */
1315 return TARGET_XFER_EOF
;
1317 if (writebuf
&& !may_write_memory
)
1318 error (_("Writing to memory is not allowed (addr %s, len %s)"),
1319 core_addr_to_string_nz (offset
), plongest (len
));
1323 /* If this is a memory transfer, let the memory-specific code
1324 have a look at it instead. Memory transfers are more
1326 if (object
== TARGET_OBJECT_MEMORY
|| object
== TARGET_OBJECT_STACK_MEMORY
1327 || object
== TARGET_OBJECT_CODE_MEMORY
)
1328 retval
= memory_xfer_partial (ops
, object
, readbuf
,
1329 writebuf
, offset
, len
, xfered_len
);
1330 else if (object
== TARGET_OBJECT_RAW_MEMORY
)
1332 /* Skip/avoid accessing the target if the memory region
1333 attributes block the access. Check this here instead of in
1334 raw_memory_xfer_partial as otherwise we'd end up checking
1335 this twice in the case of the memory_xfer_partial path is
1336 taken; once before checking the dcache, and another in the
1337 tail call to raw_memory_xfer_partial. */
1338 if (!memory_xfer_check_region (readbuf
, writebuf
, offset
, len
, &len
,
1340 return TARGET_XFER_E_IO
;
1342 /* Request the normal memory object from other layers. */
1343 retval
= raw_memory_xfer_partial (ops
, readbuf
, writebuf
, offset
, len
,
1347 retval
= ops
->to_xfer_partial (ops
, object
, annex
, readbuf
,
1348 writebuf
, offset
, len
, xfered_len
);
1352 const unsigned char *myaddr
= NULL
;
1354 fprintf_unfiltered (gdb_stdlog
,
1355 "%s:target_xfer_partial "
1356 "(%d, %s, %s, %s, %s, %s) = %d, %s",
1359 (annex
? annex
: "(null)"),
1360 host_address_to_string (readbuf
),
1361 host_address_to_string (writebuf
),
1362 core_addr_to_string_nz (offset
),
1363 pulongest (len
), retval
,
1364 pulongest (*xfered_len
));
1370 if (retval
== TARGET_XFER_OK
&& myaddr
!= NULL
)
1374 fputs_unfiltered (", bytes =", gdb_stdlog
);
1375 for (i
= 0; i
< *xfered_len
; i
++)
1377 if ((((intptr_t) &(myaddr
[i
])) & 0xf) == 0)
1379 if (targetdebug
< 2 && i
> 0)
1381 fprintf_unfiltered (gdb_stdlog
, " ...");
1384 fprintf_unfiltered (gdb_stdlog
, "\n");
1387 fprintf_unfiltered (gdb_stdlog
, " %02x", myaddr
[i
] & 0xff);
1391 fputc_unfiltered ('\n', gdb_stdlog
);
1394 /* Check implementations of to_xfer_partial update *XFERED_LEN
1395 properly. Do assertion after printing debug messages, so that we
1396 can find more clues on assertion failure from debugging messages. */
1397 if (retval
== TARGET_XFER_OK
|| retval
== TARGET_XFER_UNAVAILABLE
)
1398 gdb_assert (*xfered_len
> 0);
1403 /* Read LEN bytes of target memory at address MEMADDR, placing the
1404 results in GDB's memory at MYADDR. Returns either 0 for success or
1405 -1 if any error occurs.
1407 If an error occurs, no guarantee is made about the contents of the data at
1408 MYADDR. In particular, the caller should not depend upon partial reads
1409 filling the buffer with good data. There is no way for the caller to know
1410 how much good data might have been transfered anyway. Callers that can
1411 deal with partial reads should call target_read (which will retry until
1412 it makes no progress, and then return how much was transferred). */
1415 target_read_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1417 /* Dispatch to the topmost target, not the flattened current_target.
1418 Memory accesses check target->to_has_(all_)memory, and the
1419 flattened target doesn't inherit those. */
1420 if (target_read (current_target
.beneath
, TARGET_OBJECT_MEMORY
, NULL
,
1421 myaddr
, memaddr
, len
) == len
)
1427 /* See target/target.h. */
1430 target_read_uint32 (CORE_ADDR memaddr
, uint32_t *result
)
1435 r
= target_read_memory (memaddr
, buf
, sizeof buf
);
1438 *result
= extract_unsigned_integer (buf
, sizeof buf
,
1439 gdbarch_byte_order (target_gdbarch ()));
1443 /* Like target_read_memory, but specify explicitly that this is a read
1444 from the target's raw memory. That is, this read bypasses the
1445 dcache, breakpoint shadowing, etc. */
1448 target_read_raw_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1450 /* See comment in target_read_memory about why the request starts at
1451 current_target.beneath. */
1452 if (target_read (current_target
.beneath
, TARGET_OBJECT_RAW_MEMORY
, NULL
,
1453 myaddr
, memaddr
, len
) == len
)
1459 /* Like target_read_memory, but specify explicitly that this is a read from
1460 the target's stack. This may trigger different cache behavior. */
1463 target_read_stack (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1465 /* See comment in target_read_memory about why the request starts at
1466 current_target.beneath. */
1467 if (target_read (current_target
.beneath
, TARGET_OBJECT_STACK_MEMORY
, NULL
,
1468 myaddr
, memaddr
, len
) == len
)
1474 /* Like target_read_memory, but specify explicitly that this is a read from
1475 the target's code. This may trigger different cache behavior. */
1478 target_read_code (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1480 /* See comment in target_read_memory about why the request starts at
1481 current_target.beneath. */
1482 if (target_read (current_target
.beneath
, TARGET_OBJECT_CODE_MEMORY
, NULL
,
1483 myaddr
, memaddr
, len
) == len
)
1489 /* Write LEN bytes from MYADDR to target memory at address MEMADDR.
1490 Returns either 0 for success or -1 if any error occurs. If an
1491 error occurs, no guarantee is made about how much data got written.
1492 Callers that can deal with partial writes should call
1496 target_write_memory (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ssize_t len
)
1498 /* See comment in target_read_memory about why the request starts at
1499 current_target.beneath. */
1500 if (target_write (current_target
.beneath
, TARGET_OBJECT_MEMORY
, NULL
,
1501 myaddr
, memaddr
, len
) == len
)
1507 /* Write LEN bytes from MYADDR to target raw memory at address
1508 MEMADDR. Returns either 0 for success or -1 if any error occurs.
1509 If an error occurs, no guarantee is made about how much data got
1510 written. Callers that can deal with partial writes should call
1514 target_write_raw_memory (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ssize_t len
)
1516 /* See comment in target_read_memory about why the request starts at
1517 current_target.beneath. */
1518 if (target_write (current_target
.beneath
, TARGET_OBJECT_RAW_MEMORY
, NULL
,
1519 myaddr
, memaddr
, len
) == len
)
1525 /* Fetch the target's memory map. */
1528 target_memory_map (void)
1530 VEC(mem_region_s
) *result
;
1531 struct mem_region
*last_one
, *this_one
;
1533 struct target_ops
*t
;
1535 result
= current_target
.to_memory_map (¤t_target
);
1539 qsort (VEC_address (mem_region_s
, result
),
1540 VEC_length (mem_region_s
, result
),
1541 sizeof (struct mem_region
), mem_region_cmp
);
1543 /* Check that regions do not overlap. Simultaneously assign
1544 a numbering for the "mem" commands to use to refer to
1547 for (ix
= 0; VEC_iterate (mem_region_s
, result
, ix
, this_one
); ix
++)
1549 this_one
->number
= ix
;
1551 if (last_one
&& last_one
->hi
> this_one
->lo
)
1553 warning (_("Overlapping regions in memory map: ignoring"));
1554 VEC_free (mem_region_s
, result
);
1557 last_one
= this_one
;
1564 target_flash_erase (ULONGEST address
, LONGEST length
)
1566 current_target
.to_flash_erase (¤t_target
, address
, length
);
1570 target_flash_done (void)
1572 current_target
.to_flash_done (¤t_target
);
1576 show_trust_readonly (struct ui_file
*file
, int from_tty
,
1577 struct cmd_list_element
*c
, const char *value
)
1579 fprintf_filtered (file
,
1580 _("Mode for reading from readonly sections is %s.\n"),
1584 /* Target vector read/write partial wrapper functions. */
1586 static enum target_xfer_status
1587 target_read_partial (struct target_ops
*ops
,
1588 enum target_object object
,
1589 const char *annex
, gdb_byte
*buf
,
1590 ULONGEST offset
, ULONGEST len
,
1591 ULONGEST
*xfered_len
)
1593 return target_xfer_partial (ops
, object
, annex
, buf
, NULL
, offset
, len
,
1597 static enum target_xfer_status
1598 target_write_partial (struct target_ops
*ops
,
1599 enum target_object object
,
1600 const char *annex
, const gdb_byte
*buf
,
1601 ULONGEST offset
, LONGEST len
, ULONGEST
*xfered_len
)
1603 return target_xfer_partial (ops
, object
, annex
, NULL
, buf
, offset
, len
,
1607 /* Wrappers to perform the full transfer. */
1609 /* For docs on target_read see target.h. */
1612 target_read (struct target_ops
*ops
,
1613 enum target_object object
,
1614 const char *annex
, gdb_byte
*buf
,
1615 ULONGEST offset
, LONGEST len
)
1617 LONGEST xfered_total
= 0;
1620 /* If we are reading from a memory object, find the length of an addressable
1621 unit for that architecture. */
1622 if (object
== TARGET_OBJECT_MEMORY
1623 || object
== TARGET_OBJECT_STACK_MEMORY
1624 || object
== TARGET_OBJECT_CODE_MEMORY
1625 || object
== TARGET_OBJECT_RAW_MEMORY
)
1626 unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
1628 while (xfered_total
< len
)
1630 ULONGEST xfered_partial
;
1631 enum target_xfer_status status
;
1633 status
= target_read_partial (ops
, object
, annex
,
1634 buf
+ xfered_total
* unit_size
,
1635 offset
+ xfered_total
, len
- xfered_total
,
1638 /* Call an observer, notifying them of the xfer progress? */
1639 if (status
== TARGET_XFER_EOF
)
1640 return xfered_total
;
1641 else if (status
== TARGET_XFER_OK
)
1643 xfered_total
+= xfered_partial
;
1647 return TARGET_XFER_E_IO
;
1653 /* Assuming that the entire [begin, end) range of memory cannot be
1654 read, try to read whatever subrange is possible to read.
1656 The function returns, in RESULT, either zero or one memory block.
1657 If there's a readable subrange at the beginning, it is completely
1658 read and returned. Any further readable subrange will not be read.
1659 Otherwise, if there's a readable subrange at the end, it will be
1660 completely read and returned. Any readable subranges before it
1661 (obviously, not starting at the beginning), will be ignored. In
1662 other cases -- either no readable subrange, or readable subrange(s)
1663 that is neither at the beginning, or end, nothing is returned.
1665 The purpose of this function is to handle a read across a boundary
1666 of accessible memory in a case when memory map is not available.
1667 The above restrictions are fine for this case, but will give
1668 incorrect results if the memory is 'patchy'. However, supporting
1669 'patchy' memory would require trying to read every single byte,
1670 and it seems unacceptable solution. Explicit memory map is
1671 recommended for this case -- and target_read_memory_robust will
1672 take care of reading multiple ranges then. */
1675 read_whatever_is_readable (struct target_ops
*ops
,
1676 const ULONGEST begin
, const ULONGEST end
,
1678 VEC(memory_read_result_s
) **result
)
1680 gdb_byte
*buf
= (gdb_byte
*) xmalloc (end
- begin
);
1681 ULONGEST current_begin
= begin
;
1682 ULONGEST current_end
= end
;
1684 memory_read_result_s r
;
1685 ULONGEST xfered_len
;
1687 /* If we previously failed to read 1 byte, nothing can be done here. */
1688 if (end
- begin
<= 1)
1694 /* Check that either first or the last byte is readable, and give up
1695 if not. This heuristic is meant to permit reading accessible memory
1696 at the boundary of accessible region. */
1697 if (target_read_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1698 buf
, begin
, 1, &xfered_len
) == TARGET_XFER_OK
)
1703 else if (target_read_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1704 buf
+ (end
- begin
) - 1, end
- 1, 1,
1705 &xfered_len
) == TARGET_XFER_OK
)
1716 /* Loop invariant is that the [current_begin, current_end) was previously
1717 found to be not readable as a whole.
1719 Note loop condition -- if the range has 1 byte, we can't divide the range
1720 so there's no point trying further. */
1721 while (current_end
- current_begin
> 1)
1723 ULONGEST first_half_begin
, first_half_end
;
1724 ULONGEST second_half_begin
, second_half_end
;
1726 ULONGEST middle
= current_begin
+ (current_end
- current_begin
) / 2;
1730 first_half_begin
= current_begin
;
1731 first_half_end
= middle
;
1732 second_half_begin
= middle
;
1733 second_half_end
= current_end
;
1737 first_half_begin
= middle
;
1738 first_half_end
= current_end
;
1739 second_half_begin
= current_begin
;
1740 second_half_end
= middle
;
1743 xfer
= target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1744 buf
+ (first_half_begin
- begin
) * unit_size
,
1746 first_half_end
- first_half_begin
);
1748 if (xfer
== first_half_end
- first_half_begin
)
1750 /* This half reads up fine. So, the error must be in the
1752 current_begin
= second_half_begin
;
1753 current_end
= second_half_end
;
1757 /* This half is not readable. Because we've tried one byte, we
1758 know some part of this half if actually readable. Go to the next
1759 iteration to divide again and try to read.
1761 We don't handle the other half, because this function only tries
1762 to read a single readable subrange. */
1763 current_begin
= first_half_begin
;
1764 current_end
= first_half_end
;
1770 /* The [begin, current_begin) range has been read. */
1772 r
.end
= current_begin
;
1777 /* The [current_end, end) range has been read. */
1778 LONGEST region_len
= end
- current_end
;
1780 r
.data
= (gdb_byte
*) xmalloc (region_len
* unit_size
);
1781 memcpy (r
.data
, buf
+ (current_end
- begin
) * unit_size
,
1782 region_len
* unit_size
);
1783 r
.begin
= current_end
;
1787 VEC_safe_push(memory_read_result_s
, (*result
), &r
);
1791 free_memory_read_result_vector (void *x
)
1793 VEC(memory_read_result_s
) *v
= (VEC(memory_read_result_s
) *) x
;
1794 memory_read_result_s
*current
;
1797 for (ix
= 0; VEC_iterate (memory_read_result_s
, v
, ix
, current
); ++ix
)
1799 xfree (current
->data
);
1801 VEC_free (memory_read_result_s
, v
);
1804 VEC(memory_read_result_s
) *
1805 read_memory_robust (struct target_ops
*ops
,
1806 const ULONGEST offset
, const LONGEST len
)
1808 VEC(memory_read_result_s
) *result
= 0;
1809 int unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
1811 LONGEST xfered_total
= 0;
1812 while (xfered_total
< len
)
1814 struct mem_region
*region
= lookup_mem_region (offset
+ xfered_total
);
1817 /* If there is no explicit region, a fake one should be created. */
1818 gdb_assert (region
);
1820 if (region
->hi
== 0)
1821 region_len
= len
- xfered_total
;
1823 region_len
= region
->hi
- offset
;
1825 if (region
->attrib
.mode
== MEM_NONE
|| region
->attrib
.mode
== MEM_WO
)
1827 /* Cannot read this region. Note that we can end up here only
1828 if the region is explicitly marked inaccessible, or
1829 'inaccessible-by-default' is in effect. */
1830 xfered_total
+= region_len
;
1834 LONGEST to_read
= min (len
- xfered_total
, region_len
);
1835 gdb_byte
*buffer
= (gdb_byte
*) xmalloc (to_read
* unit_size
);
1837 LONGEST xfered_partial
=
1838 target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1839 (gdb_byte
*) buffer
,
1840 offset
+ xfered_total
, to_read
);
1841 /* Call an observer, notifying them of the xfer progress? */
1842 if (xfered_partial
<= 0)
1844 /* Got an error reading full chunk. See if maybe we can read
1847 read_whatever_is_readable (ops
, offset
+ xfered_total
,
1848 offset
+ xfered_total
+ to_read
,
1849 unit_size
, &result
);
1850 xfered_total
+= to_read
;
1854 struct memory_read_result r
;
1856 r
.begin
= offset
+ xfered_total
;
1857 r
.end
= r
.begin
+ xfered_partial
;
1858 VEC_safe_push (memory_read_result_s
, result
, &r
);
1859 xfered_total
+= xfered_partial
;
1868 /* An alternative to target_write with progress callbacks. */
1871 target_write_with_progress (struct target_ops
*ops
,
1872 enum target_object object
,
1873 const char *annex
, const gdb_byte
*buf
,
1874 ULONGEST offset
, LONGEST len
,
1875 void (*progress
) (ULONGEST
, void *), void *baton
)
1877 LONGEST xfered_total
= 0;
1880 /* If we are writing to a memory object, find the length of an addressable
1881 unit for that architecture. */
1882 if (object
== TARGET_OBJECT_MEMORY
1883 || object
== TARGET_OBJECT_STACK_MEMORY
1884 || object
== TARGET_OBJECT_CODE_MEMORY
1885 || object
== TARGET_OBJECT_RAW_MEMORY
)
1886 unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
1888 /* Give the progress callback a chance to set up. */
1890 (*progress
) (0, baton
);
1892 while (xfered_total
< len
)
1894 ULONGEST xfered_partial
;
1895 enum target_xfer_status status
;
1897 status
= target_write_partial (ops
, object
, annex
,
1898 buf
+ xfered_total
* unit_size
,
1899 offset
+ xfered_total
, len
- xfered_total
,
1902 if (status
!= TARGET_XFER_OK
)
1903 return status
== TARGET_XFER_EOF
? xfered_total
: TARGET_XFER_E_IO
;
1906 (*progress
) (xfered_partial
, baton
);
1908 xfered_total
+= xfered_partial
;
1914 /* For docs on target_write see target.h. */
1917 target_write (struct target_ops
*ops
,
1918 enum target_object object
,
1919 const char *annex
, const gdb_byte
*buf
,
1920 ULONGEST offset
, LONGEST len
)
1922 return target_write_with_progress (ops
, object
, annex
, buf
, offset
, len
,
1926 /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return
1927 the size of the transferred data. PADDING additional bytes are
1928 available in *BUF_P. This is a helper function for
1929 target_read_alloc; see the declaration of that function for more
1933 target_read_alloc_1 (struct target_ops
*ops
, enum target_object object
,
1934 const char *annex
, gdb_byte
**buf_p
, int padding
)
1936 size_t buf_alloc
, buf_pos
;
1939 /* This function does not have a length parameter; it reads the
1940 entire OBJECT). Also, it doesn't support objects fetched partly
1941 from one target and partly from another (in a different stratum,
1942 e.g. a core file and an executable). Both reasons make it
1943 unsuitable for reading memory. */
1944 gdb_assert (object
!= TARGET_OBJECT_MEMORY
);
1946 /* Start by reading up to 4K at a time. The target will throttle
1947 this number down if necessary. */
1949 buf
= (gdb_byte
*) xmalloc (buf_alloc
);
1953 ULONGEST xfered_len
;
1954 enum target_xfer_status status
;
1956 status
= target_read_partial (ops
, object
, annex
, &buf
[buf_pos
],
1957 buf_pos
, buf_alloc
- buf_pos
- padding
,
1960 if (status
== TARGET_XFER_EOF
)
1962 /* Read all there was. */
1969 else if (status
!= TARGET_XFER_OK
)
1971 /* An error occurred. */
1973 return TARGET_XFER_E_IO
;
1976 buf_pos
+= xfered_len
;
1978 /* If the buffer is filling up, expand it. */
1979 if (buf_alloc
< buf_pos
* 2)
1982 buf
= (gdb_byte
*) xrealloc (buf
, buf_alloc
);
1989 /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return
1990 the size of the transferred data. See the declaration in "target.h"
1991 function for more information about the return value. */
1994 target_read_alloc (struct target_ops
*ops
, enum target_object object
,
1995 const char *annex
, gdb_byte
**buf_p
)
1997 return target_read_alloc_1 (ops
, object
, annex
, buf_p
, 0);
2000 /* Read OBJECT/ANNEX using OPS. The result is NUL-terminated and
2001 returned as a string, allocated using xmalloc. If an error occurs
2002 or the transfer is unsupported, NULL is returned. Empty objects
2003 are returned as allocated but empty strings. A warning is issued
2004 if the result contains any embedded NUL bytes. */
2007 target_read_stralloc (struct target_ops
*ops
, enum target_object object
,
2012 LONGEST i
, transferred
;
2014 transferred
= target_read_alloc_1 (ops
, object
, annex
, &buffer
, 1);
2015 bufstr
= (char *) buffer
;
2017 if (transferred
< 0)
2020 if (transferred
== 0)
2021 return xstrdup ("");
2023 bufstr
[transferred
] = 0;
2025 /* Check for embedded NUL bytes; but allow trailing NULs. */
2026 for (i
= strlen (bufstr
); i
< transferred
; i
++)
2029 warning (_("target object %d, annex %s, "
2030 "contained unexpected null characters"),
2031 (int) object
, annex
? annex
: "(none)");
2038 /* Memory transfer methods. */
2041 get_target_memory (struct target_ops
*ops
, CORE_ADDR addr
, gdb_byte
*buf
,
2044 /* This method is used to read from an alternate, non-current
2045 target. This read must bypass the overlay support (as symbols
2046 don't match this target), and GDB's internal cache (wrong cache
2047 for this target). */
2048 if (target_read (ops
, TARGET_OBJECT_RAW_MEMORY
, NULL
, buf
, addr
, len
)
2050 memory_error (TARGET_XFER_E_IO
, addr
);
2054 get_target_memory_unsigned (struct target_ops
*ops
, CORE_ADDR addr
,
2055 int len
, enum bfd_endian byte_order
)
2057 gdb_byte buf
[sizeof (ULONGEST
)];
2059 gdb_assert (len
<= sizeof (buf
));
2060 get_target_memory (ops
, addr
, buf
, len
);
2061 return extract_unsigned_integer (buf
, len
, byte_order
);
2067 target_insert_breakpoint (struct gdbarch
*gdbarch
,
2068 struct bp_target_info
*bp_tgt
)
2070 if (!may_insert_breakpoints
)
2072 warning (_("May not insert breakpoints"));
2076 return current_target
.to_insert_breakpoint (¤t_target
,
2083 target_remove_breakpoint (struct gdbarch
*gdbarch
,
2084 struct bp_target_info
*bp_tgt
)
2086 /* This is kind of a weird case to handle, but the permission might
2087 have been changed after breakpoints were inserted - in which case
2088 we should just take the user literally and assume that any
2089 breakpoints should be left in place. */
2090 if (!may_insert_breakpoints
)
2092 warning (_("May not remove breakpoints"));
2096 return current_target
.to_remove_breakpoint (¤t_target
,
2101 target_info (char *args
, int from_tty
)
2103 struct target_ops
*t
;
2104 int has_all_mem
= 0;
2106 if (symfile_objfile
!= NULL
)
2107 printf_unfiltered (_("Symbols from \"%s\".\n"),
2108 objfile_name (symfile_objfile
));
2110 for (t
= target_stack
; t
!= NULL
; t
= t
->beneath
)
2112 if (!(*t
->to_has_memory
) (t
))
2115 if ((int) (t
->to_stratum
) <= (int) dummy_stratum
)
2118 printf_unfiltered (_("\tWhile running this, "
2119 "GDB does not access memory from...\n"));
2120 printf_unfiltered ("%s:\n", t
->to_longname
);
2121 (t
->to_files_info
) (t
);
2122 has_all_mem
= (*t
->to_has_all_memory
) (t
);
2126 /* This function is called before any new inferior is created, e.g.
2127 by running a program, attaching, or connecting to a target.
2128 It cleans up any state from previous invocations which might
2129 change between runs. This is a subset of what target_preopen
2130 resets (things which might change between targets). */
2133 target_pre_inferior (int from_tty
)
2135 /* Clear out solib state. Otherwise the solib state of the previous
2136 inferior might have survived and is entirely wrong for the new
2137 target. This has been observed on GNU/Linux using glibc 2.3. How
2149 Cannot access memory at address 0xdeadbeef
2152 /* In some OSs, the shared library list is the same/global/shared
2153 across inferiors. If code is shared between processes, so are
2154 memory regions and features. */
2155 if (!gdbarch_has_global_solist (target_gdbarch ()))
2157 no_shared_libraries (NULL
, from_tty
);
2159 invalidate_target_mem_regions ();
2161 target_clear_description ();
2164 /* attach_flag may be set if the previous process associated with
2165 the inferior was attached to. */
2166 current_inferior ()->attach_flag
= 0;
2168 current_inferior ()->highest_thread_num
= 0;
2170 agent_capability_invalidate ();
2173 /* Callback for iterate_over_inferiors. Gets rid of the given
2177 dispose_inferior (struct inferior
*inf
, void *args
)
2179 struct thread_info
*thread
;
2181 thread
= any_thread_of_process (inf
->pid
);
2184 switch_to_thread (thread
->ptid
);
2186 /* Core inferiors actually should be detached, not killed. */
2187 if (target_has_execution
)
2190 target_detach (NULL
, 0);
2196 /* This is to be called by the open routine before it does
2200 target_preopen (int from_tty
)
2204 if (have_inferiors ())
2207 || !have_live_inferiors ()
2208 || query (_("A program is being debugged already. Kill it? ")))
2209 iterate_over_inferiors (dispose_inferior
, NULL
);
2211 error (_("Program not killed."));
2214 /* Calling target_kill may remove the target from the stack. But if
2215 it doesn't (which seems like a win for UDI), remove it now. */
2216 /* Leave the exec target, though. The user may be switching from a
2217 live process to a core of the same program. */
2218 pop_all_targets_above (file_stratum
);
2220 target_pre_inferior (from_tty
);
2223 /* Detach a target after doing deferred register stores. */
2226 target_detach (const char *args
, int from_tty
)
2228 struct target_ops
* t
;
2230 if (gdbarch_has_global_breakpoints (target_gdbarch ()))
2231 /* Don't remove global breakpoints here. They're removed on
2232 disconnection from the target. */
2235 /* If we're in breakpoints-always-inserted mode, have to remove
2236 them before detaching. */
2237 remove_breakpoints_pid (ptid_get_pid (inferior_ptid
));
2239 prepare_for_detach ();
2241 current_target
.to_detach (¤t_target
, args
, from_tty
);
2245 target_disconnect (const char *args
, int from_tty
)
2247 /* If we're in breakpoints-always-inserted mode or if breakpoints
2248 are global across processes, we have to remove them before
2250 remove_breakpoints ();
2252 current_target
.to_disconnect (¤t_target
, args
, from_tty
);
2256 target_wait (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
2258 return (current_target
.to_wait
) (¤t_target
, ptid
, status
, options
);
2264 default_target_wait (struct target_ops
*ops
,
2265 ptid_t ptid
, struct target_waitstatus
*status
,
2268 status
->kind
= TARGET_WAITKIND_IGNORE
;
2269 return minus_one_ptid
;
2273 target_pid_to_str (ptid_t ptid
)
2275 return (*current_target
.to_pid_to_str
) (¤t_target
, ptid
);
2279 target_thread_name (struct thread_info
*info
)
2281 return current_target
.to_thread_name (¤t_target
, info
);
2285 target_resume (ptid_t ptid
, int step
, enum gdb_signal signal
)
2287 struct target_ops
*t
;
2289 target_dcache_invalidate ();
2291 current_target
.to_resume (¤t_target
, ptid
, step
, signal
);
2293 registers_changed_ptid (ptid
);
2294 /* We only set the internal executing state here. The user/frontend
2295 running state is set at a higher level. */
2296 set_executing (ptid
, 1);
2297 clear_inline_frame_state (ptid
);
2301 target_pass_signals (int numsigs
, unsigned char *pass_signals
)
2303 (*current_target
.to_pass_signals
) (¤t_target
, numsigs
, pass_signals
);
2307 target_program_signals (int numsigs
, unsigned char *program_signals
)
2309 (*current_target
.to_program_signals
) (¤t_target
,
2310 numsigs
, program_signals
);
2314 default_follow_fork (struct target_ops
*self
, int follow_child
,
2317 /* Some target returned a fork event, but did not know how to follow it. */
2318 internal_error (__FILE__
, __LINE__
,
2319 _("could not find a target to follow fork"));
2322 /* Look through the list of possible targets for a target that can
2326 target_follow_fork (int follow_child
, int detach_fork
)
2328 return current_target
.to_follow_fork (¤t_target
,
2329 follow_child
, detach_fork
);
2332 /* Target wrapper for follow exec hook. */
2335 target_follow_exec (struct inferior
*inf
, char *execd_pathname
)
2337 current_target
.to_follow_exec (¤t_target
, inf
, execd_pathname
);
2341 default_mourn_inferior (struct target_ops
*self
)
2343 internal_error (__FILE__
, __LINE__
,
2344 _("could not find a target to follow mourn inferior"));
2348 target_mourn_inferior (void)
2350 current_target
.to_mourn_inferior (¤t_target
);
2352 /* We no longer need to keep handles on any of the object files.
2353 Make sure to release them to avoid unnecessarily locking any
2354 of them while we're not actually debugging. */
2355 bfd_cache_close_all ();
2358 /* Look for a target which can describe architectural features, starting
2359 from TARGET. If we find one, return its description. */
2361 const struct target_desc
*
2362 target_read_description (struct target_ops
*target
)
2364 return target
->to_read_description (target
);
2367 /* This implements a basic search of memory, reading target memory and
2368 performing the search here (as opposed to performing the search in on the
2369 target side with, for example, gdbserver). */
2372 simple_search_memory (struct target_ops
*ops
,
2373 CORE_ADDR start_addr
, ULONGEST search_space_len
,
2374 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2375 CORE_ADDR
*found_addrp
)
2377 /* NOTE: also defined in find.c testcase. */
2378 #define SEARCH_CHUNK_SIZE 16000
2379 const unsigned chunk_size
= SEARCH_CHUNK_SIZE
;
2380 /* Buffer to hold memory contents for searching. */
2381 gdb_byte
*search_buf
;
2382 unsigned search_buf_size
;
2383 struct cleanup
*old_cleanups
;
2385 search_buf_size
= chunk_size
+ pattern_len
- 1;
2387 /* No point in trying to allocate a buffer larger than the search space. */
2388 if (search_space_len
< search_buf_size
)
2389 search_buf_size
= search_space_len
;
2391 search_buf
= (gdb_byte
*) malloc (search_buf_size
);
2392 if (search_buf
== NULL
)
2393 error (_("Unable to allocate memory to perform the search."));
2394 old_cleanups
= make_cleanup (free_current_contents
, &search_buf
);
2396 /* Prime the search buffer. */
2398 if (target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2399 search_buf
, start_addr
, search_buf_size
) != search_buf_size
)
2401 warning (_("Unable to access %s bytes of target "
2402 "memory at %s, halting search."),
2403 pulongest (search_buf_size
), hex_string (start_addr
));
2404 do_cleanups (old_cleanups
);
2408 /* Perform the search.
2410 The loop is kept simple by allocating [N + pattern-length - 1] bytes.
2411 When we've scanned N bytes we copy the trailing bytes to the start and
2412 read in another N bytes. */
2414 while (search_space_len
>= pattern_len
)
2416 gdb_byte
*found_ptr
;
2417 unsigned nr_search_bytes
= min (search_space_len
, search_buf_size
);
2419 found_ptr
= (gdb_byte
*) memmem (search_buf
, nr_search_bytes
,
2420 pattern
, pattern_len
);
2422 if (found_ptr
!= NULL
)
2424 CORE_ADDR found_addr
= start_addr
+ (found_ptr
- search_buf
);
2426 *found_addrp
= found_addr
;
2427 do_cleanups (old_cleanups
);
2431 /* Not found in this chunk, skip to next chunk. */
2433 /* Don't let search_space_len wrap here, it's unsigned. */
2434 if (search_space_len
>= chunk_size
)
2435 search_space_len
-= chunk_size
;
2437 search_space_len
= 0;
2439 if (search_space_len
>= pattern_len
)
2441 unsigned keep_len
= search_buf_size
- chunk_size
;
2442 CORE_ADDR read_addr
= start_addr
+ chunk_size
+ keep_len
;
2445 /* Copy the trailing part of the previous iteration to the front
2446 of the buffer for the next iteration. */
2447 gdb_assert (keep_len
== pattern_len
- 1);
2448 memcpy (search_buf
, search_buf
+ chunk_size
, keep_len
);
2450 nr_to_read
= min (search_space_len
- keep_len
, chunk_size
);
2452 if (target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2453 search_buf
+ keep_len
, read_addr
,
2454 nr_to_read
) != nr_to_read
)
2456 warning (_("Unable to access %s bytes of target "
2457 "memory at %s, halting search."),
2458 plongest (nr_to_read
),
2459 hex_string (read_addr
));
2460 do_cleanups (old_cleanups
);
2464 start_addr
+= chunk_size
;
2470 do_cleanups (old_cleanups
);
2474 /* Default implementation of memory-searching. */
2477 default_search_memory (struct target_ops
*self
,
2478 CORE_ADDR start_addr
, ULONGEST search_space_len
,
2479 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2480 CORE_ADDR
*found_addrp
)
2482 /* Start over from the top of the target stack. */
2483 return simple_search_memory (current_target
.beneath
,
2484 start_addr
, search_space_len
,
2485 pattern
, pattern_len
, found_addrp
);
2488 /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the
2489 sequence of bytes in PATTERN with length PATTERN_LEN.
2491 The result is 1 if found, 0 if not found, and -1 if there was an error
2492 requiring halting of the search (e.g. memory read error).
2493 If the pattern is found the address is recorded in FOUND_ADDRP. */
2496 target_search_memory (CORE_ADDR start_addr
, ULONGEST search_space_len
,
2497 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2498 CORE_ADDR
*found_addrp
)
2500 return current_target
.to_search_memory (¤t_target
, start_addr
,
2502 pattern
, pattern_len
, found_addrp
);
2505 /* Look through the currently pushed targets. If none of them will
2506 be able to restart the currently running process, issue an error
2510 target_require_runnable (void)
2512 struct target_ops
*t
;
2514 for (t
= target_stack
; t
!= NULL
; t
= t
->beneath
)
2516 /* If this target knows how to create a new program, then
2517 assume we will still be able to after killing the current
2518 one. Either killing and mourning will not pop T, or else
2519 find_default_run_target will find it again. */
2520 if (t
->to_create_inferior
!= NULL
)
2523 /* Do not worry about targets at certain strata that can not
2524 create inferiors. Assume they will be pushed again if
2525 necessary, and continue to the process_stratum. */
2526 if (t
->to_stratum
== thread_stratum
2527 || t
->to_stratum
== record_stratum
2528 || t
->to_stratum
== arch_stratum
)
2531 error (_("The \"%s\" target does not support \"run\". "
2532 "Try \"help target\" or \"continue\"."),
2536 /* This function is only called if the target is running. In that
2537 case there should have been a process_stratum target and it
2538 should either know how to create inferiors, or not... */
2539 internal_error (__FILE__
, __LINE__
, _("No targets found"));
2542 /* Whether GDB is allowed to fall back to the default run target for
2543 "run", "attach", etc. when no target is connected yet. */
2544 static int auto_connect_native_target
= 1;
2547 show_auto_connect_native_target (struct ui_file
*file
, int from_tty
,
2548 struct cmd_list_element
*c
, const char *value
)
2550 fprintf_filtered (file
,
2551 _("Whether GDB may automatically connect to the "
2552 "native target is %s.\n"),
2556 /* Look through the list of possible targets for a target that can
2557 execute a run or attach command without any other data. This is
2558 used to locate the default process stratum.
2560 If DO_MESG is not NULL, the result is always valid (error() is
2561 called for errors); else, return NULL on error. */
2563 static struct target_ops
*
2564 find_default_run_target (char *do_mesg
)
2566 struct target_ops
*runable
= NULL
;
2568 if (auto_connect_native_target
)
2570 struct target_ops
*t
;
2574 for (i
= 0; VEC_iterate (target_ops_p
, target_structs
, i
, t
); ++i
)
2576 if (t
->to_can_run
!= delegate_can_run
&& target_can_run (t
))
2587 if (runable
== NULL
)
2590 error (_("Don't know how to %s. Try \"help target\"."), do_mesg
);
2601 find_attach_target (void)
2603 struct target_ops
*t
;
2605 /* If a target on the current stack can attach, use it. */
2606 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2608 if (t
->to_attach
!= NULL
)
2612 /* Otherwise, use the default run target for attaching. */
2614 t
= find_default_run_target ("attach");
2622 find_run_target (void)
2624 struct target_ops
*t
;
2626 /* If a target on the current stack can attach, use it. */
2627 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2629 if (t
->to_create_inferior
!= NULL
)
2633 /* Otherwise, use the default run target. */
2635 t
= find_default_run_target ("run");
2640 /* Implement the "info proc" command. */
2643 target_info_proc (const char *args
, enum info_proc_what what
)
2645 struct target_ops
*t
;
2647 /* If we're already connected to something that can get us OS
2648 related data, use it. Otherwise, try using the native
2650 if (current_target
.to_stratum
>= process_stratum
)
2651 t
= current_target
.beneath
;
2653 t
= find_default_run_target (NULL
);
2655 for (; t
!= NULL
; t
= t
->beneath
)
2657 if (t
->to_info_proc
!= NULL
)
2659 t
->to_info_proc (t
, args
, what
);
2662 fprintf_unfiltered (gdb_stdlog
,
2663 "target_info_proc (\"%s\", %d)\n", args
, what
);
2673 find_default_supports_disable_randomization (struct target_ops
*self
)
2675 struct target_ops
*t
;
2677 t
= find_default_run_target (NULL
);
2678 if (t
&& t
->to_supports_disable_randomization
)
2679 return (t
->to_supports_disable_randomization
) (t
);
2684 target_supports_disable_randomization (void)
2686 struct target_ops
*t
;
2688 for (t
= ¤t_target
; t
!= NULL
; t
= t
->beneath
)
2689 if (t
->to_supports_disable_randomization
)
2690 return t
->to_supports_disable_randomization (t
);
2696 target_get_osdata (const char *type
)
2698 struct target_ops
*t
;
2700 /* If we're already connected to something that can get us OS
2701 related data, use it. Otherwise, try using the native
2703 if (current_target
.to_stratum
>= process_stratum
)
2704 t
= current_target
.beneath
;
2706 t
= find_default_run_target ("get OS data");
2711 return target_read_stralloc (t
, TARGET_OBJECT_OSDATA
, type
);
2714 static struct address_space
*
2715 default_thread_address_space (struct target_ops
*self
, ptid_t ptid
)
2717 struct inferior
*inf
;
2719 /* Fall-back to the "main" address space of the inferior. */
2720 inf
= find_inferior_ptid (ptid
);
2722 if (inf
== NULL
|| inf
->aspace
== NULL
)
2723 internal_error (__FILE__
, __LINE__
,
2724 _("Can't determine the current "
2725 "address space of thread %s\n"),
2726 target_pid_to_str (ptid
));
2731 /* Determine the current address space of thread PTID. */
2733 struct address_space
*
2734 target_thread_address_space (ptid_t ptid
)
2736 struct address_space
*aspace
;
2738 aspace
= current_target
.to_thread_address_space (¤t_target
, ptid
);
2739 gdb_assert (aspace
!= NULL
);
2745 /* Target file operations. */
2747 static struct target_ops
*
2748 default_fileio_target (void)
2750 /* If we're already connected to something that can perform
2751 file I/O, use it. Otherwise, try using the native target. */
2752 if (current_target
.to_stratum
>= process_stratum
)
2753 return current_target
.beneath
;
2755 return find_default_run_target ("file I/O");
2758 /* File handle for target file operations. */
2762 /* The target on which this file is open. */
2763 struct target_ops
*t
;
2765 /* The file descriptor on the target. */
2769 DEF_VEC_O (fileio_fh_t
);
2771 /* Vector of currently open file handles. The value returned by
2772 target_fileio_open and passed as the FD argument to other
2773 target_fileio_* functions is an index into this vector. This
2774 vector's entries are never freed; instead, files are marked as
2775 closed, and the handle becomes available for reuse. */
2776 static VEC (fileio_fh_t
) *fileio_fhandles
;
2778 /* Macro to check whether a fileio_fh_t represents a closed file. */
2779 #define is_closed_fileio_fh(fd) ((fd) < 0)
2781 /* Index into fileio_fhandles of the lowest handle that might be
2782 closed. This permits handle reuse without searching the whole
2783 list each time a new file is opened. */
2784 static int lowest_closed_fd
;
2786 /* Acquire a target fileio file descriptor. */
2789 acquire_fileio_fd (struct target_ops
*t
, int fd
)
2791 fileio_fh_t
*fh
, buf
;
2793 gdb_assert (!is_closed_fileio_fh (fd
));
2795 /* Search for closed handles to reuse. */
2797 VEC_iterate (fileio_fh_t
, fileio_fhandles
,
2798 lowest_closed_fd
, fh
);
2800 if (is_closed_fileio_fh (fh
->fd
))
2803 /* Push a new handle if no closed handles were found. */
2804 if (lowest_closed_fd
== VEC_length (fileio_fh_t
, fileio_fhandles
))
2805 fh
= VEC_safe_push (fileio_fh_t
, fileio_fhandles
, NULL
);
2807 /* Fill in the handle. */
2811 /* Return its index, and start the next lookup at
2813 return lowest_closed_fd
++;
2816 /* Release a target fileio file descriptor. */
2819 release_fileio_fd (int fd
, fileio_fh_t
*fh
)
2822 lowest_closed_fd
= min (lowest_closed_fd
, fd
);
2825 /* Return a pointer to the fileio_fhandle_t corresponding to FD. */
2827 #define fileio_fd_to_fh(fd) \
2828 VEC_index (fileio_fh_t, fileio_fhandles, (fd))
2830 /* Helper for target_fileio_open and
2831 target_fileio_open_warn_if_slow. */
2834 target_fileio_open_1 (struct inferior
*inf
, const char *filename
,
2835 int flags
, int mode
, int warn_if_slow
,
2838 struct target_ops
*t
;
2840 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
2842 if (t
->to_fileio_open
!= NULL
)
2844 int fd
= t
->to_fileio_open (t
, inf
, filename
, flags
, mode
,
2845 warn_if_slow
, target_errno
);
2850 fd
= acquire_fileio_fd (t
, fd
);
2853 fprintf_unfiltered (gdb_stdlog
,
2854 "target_fileio_open (%d,%s,0x%x,0%o,%d)"
2856 inf
== NULL
? 0 : inf
->num
,
2857 filename
, flags
, mode
,
2859 fd
!= -1 ? 0 : *target_errno
);
2864 *target_errno
= FILEIO_ENOSYS
;
2871 target_fileio_open (struct inferior
*inf
, const char *filename
,
2872 int flags
, int mode
, int *target_errno
)
2874 return target_fileio_open_1 (inf
, filename
, flags
, mode
, 0,
2881 target_fileio_open_warn_if_slow (struct inferior
*inf
,
2882 const char *filename
,
2883 int flags
, int mode
, int *target_errno
)
2885 return target_fileio_open_1 (inf
, filename
, flags
, mode
, 1,
2892 target_fileio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
2893 ULONGEST offset
, int *target_errno
)
2895 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
2898 if (is_closed_fileio_fh (fh
->fd
))
2899 *target_errno
= EBADF
;
2901 ret
= fh
->t
->to_fileio_pwrite (fh
->t
, fh
->fd
, write_buf
,
2902 len
, offset
, target_errno
);
2905 fprintf_unfiltered (gdb_stdlog
,
2906 "target_fileio_pwrite (%d,...,%d,%s) "
2908 fd
, len
, pulongest (offset
),
2909 ret
, ret
!= -1 ? 0 : *target_errno
);
2916 target_fileio_pread (int fd
, gdb_byte
*read_buf
, int len
,
2917 ULONGEST offset
, int *target_errno
)
2919 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
2922 if (is_closed_fileio_fh (fh
->fd
))
2923 *target_errno
= EBADF
;
2925 ret
= fh
->t
->to_fileio_pread (fh
->t
, fh
->fd
, read_buf
,
2926 len
, offset
, target_errno
);
2929 fprintf_unfiltered (gdb_stdlog
,
2930 "target_fileio_pread (%d,...,%d,%s) "
2932 fd
, len
, pulongest (offset
),
2933 ret
, ret
!= -1 ? 0 : *target_errno
);
2940 target_fileio_fstat (int fd
, struct stat
*sb
, int *target_errno
)
2942 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
2945 if (is_closed_fileio_fh (fh
->fd
))
2946 *target_errno
= EBADF
;
2948 ret
= fh
->t
->to_fileio_fstat (fh
->t
, fh
->fd
, sb
, target_errno
);
2951 fprintf_unfiltered (gdb_stdlog
,
2952 "target_fileio_fstat (%d) = %d (%d)\n",
2953 fd
, ret
, ret
!= -1 ? 0 : *target_errno
);
2960 target_fileio_close (int fd
, int *target_errno
)
2962 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
2965 if (is_closed_fileio_fh (fh
->fd
))
2966 *target_errno
= EBADF
;
2969 ret
= fh
->t
->to_fileio_close (fh
->t
, fh
->fd
, target_errno
);
2970 release_fileio_fd (fd
, fh
);
2974 fprintf_unfiltered (gdb_stdlog
,
2975 "target_fileio_close (%d) = %d (%d)\n",
2976 fd
, ret
, ret
!= -1 ? 0 : *target_errno
);
2983 target_fileio_unlink (struct inferior
*inf
, const char *filename
,
2986 struct target_ops
*t
;
2988 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
2990 if (t
->to_fileio_unlink
!= NULL
)
2992 int ret
= t
->to_fileio_unlink (t
, inf
, filename
,
2996 fprintf_unfiltered (gdb_stdlog
,
2997 "target_fileio_unlink (%d,%s)"
2999 inf
== NULL
? 0 : inf
->num
, filename
,
3000 ret
, ret
!= -1 ? 0 : *target_errno
);
3005 *target_errno
= FILEIO_ENOSYS
;
3012 target_fileio_readlink (struct inferior
*inf
, const char *filename
,
3015 struct target_ops
*t
;
3017 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
3019 if (t
->to_fileio_readlink
!= NULL
)
3021 char *ret
= t
->to_fileio_readlink (t
, inf
, filename
,
3025 fprintf_unfiltered (gdb_stdlog
,
3026 "target_fileio_readlink (%d,%s)"
3028 inf
== NULL
? 0 : inf
->num
,
3029 filename
, ret
? ret
: "(nil)",
3030 ret
? 0 : *target_errno
);
3035 *target_errno
= FILEIO_ENOSYS
;
3040 target_fileio_close_cleanup (void *opaque
)
3042 int fd
= *(int *) opaque
;
3045 target_fileio_close (fd
, &target_errno
);
3048 /* Read target file FILENAME, in the filesystem as seen by INF. If
3049 INF is NULL, use the filesystem seen by the debugger (GDB or, for
3050 remote targets, the remote stub). Store the result in *BUF_P and
3051 return the size of the transferred data. PADDING additional bytes
3052 are available in *BUF_P. This is a helper function for
3053 target_fileio_read_alloc; see the declaration of that function for
3054 more information. */
3057 target_fileio_read_alloc_1 (struct inferior
*inf
, const char *filename
,
3058 gdb_byte
**buf_p
, int padding
)
3060 struct cleanup
*close_cleanup
;
3061 size_t buf_alloc
, buf_pos
;
3067 fd
= target_fileio_open (inf
, filename
, FILEIO_O_RDONLY
, 0700,
3072 close_cleanup
= make_cleanup (target_fileio_close_cleanup
, &fd
);
3074 /* Start by reading up to 4K at a time. The target will throttle
3075 this number down if necessary. */
3077 buf
= (gdb_byte
*) xmalloc (buf_alloc
);
3081 n
= target_fileio_pread (fd
, &buf
[buf_pos
],
3082 buf_alloc
- buf_pos
- padding
, buf_pos
,
3086 /* An error occurred. */
3087 do_cleanups (close_cleanup
);
3093 /* Read all there was. */
3094 do_cleanups (close_cleanup
);
3104 /* If the buffer is filling up, expand it. */
3105 if (buf_alloc
< buf_pos
* 2)
3108 buf
= (gdb_byte
*) xrealloc (buf
, buf_alloc
);
3118 target_fileio_read_alloc (struct inferior
*inf
, const char *filename
,
3121 return target_fileio_read_alloc_1 (inf
, filename
, buf_p
, 0);
3127 target_fileio_read_stralloc (struct inferior
*inf
, const char *filename
)
3131 LONGEST i
, transferred
;
3133 transferred
= target_fileio_read_alloc_1 (inf
, filename
, &buffer
, 1);
3134 bufstr
= (char *) buffer
;
3136 if (transferred
< 0)
3139 if (transferred
== 0)
3140 return xstrdup ("");
3142 bufstr
[transferred
] = 0;
3144 /* Check for embedded NUL bytes; but allow trailing NULs. */
3145 for (i
= strlen (bufstr
); i
< transferred
; i
++)
3148 warning (_("target file %s "
3149 "contained unexpected null characters"),
3159 default_region_ok_for_hw_watchpoint (struct target_ops
*self
,
3160 CORE_ADDR addr
, int len
)
3162 return (len
<= gdbarch_ptr_bit (target_gdbarch ()) / TARGET_CHAR_BIT
);
3166 default_watchpoint_addr_within_range (struct target_ops
*target
,
3168 CORE_ADDR start
, int length
)
3170 return addr
>= start
&& addr
< start
+ length
;
3173 static struct gdbarch
*
3174 default_thread_architecture (struct target_ops
*ops
, ptid_t ptid
)
3176 return target_gdbarch ();
3180 return_zero (struct target_ops
*ignore
)
3186 return_zero_has_execution (struct target_ops
*ignore
, ptid_t ignore2
)
3192 * Find the next target down the stack from the specified target.
3196 find_target_beneath (struct target_ops
*t
)
3204 find_target_at (enum strata stratum
)
3206 struct target_ops
*t
;
3208 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3209 if (t
->to_stratum
== stratum
)
3216 /* The inferior process has died. Long live the inferior! */
3219 generic_mourn_inferior (void)
3223 ptid
= inferior_ptid
;
3224 inferior_ptid
= null_ptid
;
3226 /* Mark breakpoints uninserted in case something tries to delete a
3227 breakpoint while we delete the inferior's threads (which would
3228 fail, since the inferior is long gone). */
3229 mark_breakpoints_out ();
3231 if (!ptid_equal (ptid
, null_ptid
))
3233 int pid
= ptid_get_pid (ptid
);
3234 exit_inferior (pid
);
3237 /* Note this wipes step-resume breakpoints, so needs to be done
3238 after exit_inferior, which ends up referencing the step-resume
3239 breakpoints through clear_thread_inferior_resources. */
3240 breakpoint_init_inferior (inf_exited
);
3242 registers_changed ();
3244 reopen_exec_file ();
3245 reinit_frame_cache ();
3247 if (deprecated_detach_hook
)
3248 deprecated_detach_hook ();
3251 /* Convert a normal process ID to a string. Returns the string in a
3255 normal_pid_to_str (ptid_t ptid
)
3257 static char buf
[32];
3259 xsnprintf (buf
, sizeof buf
, "process %d", ptid_get_pid (ptid
));
3264 default_pid_to_str (struct target_ops
*ops
, ptid_t ptid
)
3266 return normal_pid_to_str (ptid
);
3269 /* Error-catcher for target_find_memory_regions. */
3271 dummy_find_memory_regions (struct target_ops
*self
,
3272 find_memory_region_ftype ignore1
, void *ignore2
)
3274 error (_("Command not implemented for this target."));
3278 /* Error-catcher for target_make_corefile_notes. */
3280 dummy_make_corefile_notes (struct target_ops
*self
,
3281 bfd
*ignore1
, int *ignore2
)
3283 error (_("Command not implemented for this target."));
3287 /* Set up the handful of non-empty slots needed by the dummy target
3291 init_dummy_target (void)
3293 dummy_target
.to_shortname
= "None";
3294 dummy_target
.to_longname
= "None";
3295 dummy_target
.to_doc
= "";
3296 dummy_target
.to_supports_disable_randomization
3297 = find_default_supports_disable_randomization
;
3298 dummy_target
.to_stratum
= dummy_stratum
;
3299 dummy_target
.to_has_all_memory
= return_zero
;
3300 dummy_target
.to_has_memory
= return_zero
;
3301 dummy_target
.to_has_stack
= return_zero
;
3302 dummy_target
.to_has_registers
= return_zero
;
3303 dummy_target
.to_has_execution
= return_zero_has_execution
;
3304 dummy_target
.to_magic
= OPS_MAGIC
;
3306 install_dummy_methods (&dummy_target
);
3311 target_close (struct target_ops
*targ
)
3313 gdb_assert (!target_is_pushed (targ
));
3315 if (targ
->to_xclose
!= NULL
)
3316 targ
->to_xclose (targ
);
3317 else if (targ
->to_close
!= NULL
)
3318 targ
->to_close (targ
);
3321 fprintf_unfiltered (gdb_stdlog
, "target_close ()\n");
3325 target_thread_alive (ptid_t ptid
)
3327 return current_target
.to_thread_alive (¤t_target
, ptid
);
3331 target_update_thread_list (void)
3333 current_target
.to_update_thread_list (¤t_target
);
3337 target_stop (ptid_t ptid
)
3341 warning (_("May not interrupt or stop the target, ignoring attempt"));
3345 (*current_target
.to_stop
) (¤t_target
, ptid
);
3349 target_interrupt (ptid_t ptid
)
3353 warning (_("May not interrupt or stop the target, ignoring attempt"));
3357 (*current_target
.to_interrupt
) (¤t_target
, ptid
);
3363 target_check_pending_interrupt (void)
3365 (*current_target
.to_check_pending_interrupt
) (¤t_target
);
3368 /* See target/target.h. */
3371 target_stop_and_wait (ptid_t ptid
)
3373 struct target_waitstatus status
;
3374 int was_non_stop
= non_stop
;
3379 memset (&status
, 0, sizeof (status
));
3380 target_wait (ptid
, &status
, 0);
3382 non_stop
= was_non_stop
;
3385 /* See target/target.h. */
3388 target_continue_no_signal (ptid_t ptid
)
3390 target_resume (ptid
, 0, GDB_SIGNAL_0
);
3393 /* Concatenate ELEM to LIST, a comma separate list, and return the
3394 result. The LIST incoming argument is released. */
3397 str_comma_list_concat_elem (char *list
, const char *elem
)
3400 return xstrdup (elem
);
3402 return reconcat (list
, list
, ", ", elem
, (char *) NULL
);
3405 /* Helper for target_options_to_string. If OPT is present in
3406 TARGET_OPTIONS, append the OPT_STR (string version of OPT) in RET.
3407 Returns the new resulting string. OPT is removed from
3411 do_option (int *target_options
, char *ret
,
3412 int opt
, char *opt_str
)
3414 if ((*target_options
& opt
) != 0)
3416 ret
= str_comma_list_concat_elem (ret
, opt_str
);
3417 *target_options
&= ~opt
;
3424 target_options_to_string (int target_options
)
3428 #define DO_TARG_OPTION(OPT) \
3429 ret = do_option (&target_options, ret, OPT, #OPT)
3431 DO_TARG_OPTION (TARGET_WNOHANG
);
3433 if (target_options
!= 0)
3434 ret
= str_comma_list_concat_elem (ret
, "unknown???");
3442 debug_print_register (const char * func
,
3443 struct regcache
*regcache
, int regno
)
3445 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
3447 fprintf_unfiltered (gdb_stdlog
, "%s ", func
);
3448 if (regno
>= 0 && regno
< gdbarch_num_regs (gdbarch
)
3449 && gdbarch_register_name (gdbarch
, regno
) != NULL
3450 && gdbarch_register_name (gdbarch
, regno
)[0] != '\0')
3451 fprintf_unfiltered (gdb_stdlog
, "(%s)",
3452 gdbarch_register_name (gdbarch
, regno
));
3454 fprintf_unfiltered (gdb_stdlog
, "(%d)", regno
);
3455 if (regno
>= 0 && regno
< gdbarch_num_regs (gdbarch
))
3457 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
3458 int i
, size
= register_size (gdbarch
, regno
);
3459 gdb_byte buf
[MAX_REGISTER_SIZE
];
3461 regcache_raw_collect (regcache
, regno
, buf
);
3462 fprintf_unfiltered (gdb_stdlog
, " = ");
3463 for (i
= 0; i
< size
; i
++)
3465 fprintf_unfiltered (gdb_stdlog
, "%02x", buf
[i
]);
3467 if (size
<= sizeof (LONGEST
))
3469 ULONGEST val
= extract_unsigned_integer (buf
, size
, byte_order
);
3471 fprintf_unfiltered (gdb_stdlog
, " %s %s",
3472 core_addr_to_string_nz (val
), plongest (val
));
3475 fprintf_unfiltered (gdb_stdlog
, "\n");
3479 target_fetch_registers (struct regcache
*regcache
, int regno
)
3481 current_target
.to_fetch_registers (¤t_target
, regcache
, regno
);
3483 debug_print_register ("target_fetch_registers", regcache
, regno
);
3487 target_store_registers (struct regcache
*regcache
, int regno
)
3489 struct target_ops
*t
;
3491 if (!may_write_registers
)
3492 error (_("Writing to registers is not allowed (regno %d)"), regno
);
3494 current_target
.to_store_registers (¤t_target
, regcache
, regno
);
3497 debug_print_register ("target_store_registers", regcache
, regno
);
3502 target_core_of_thread (ptid_t ptid
)
3504 return current_target
.to_core_of_thread (¤t_target
, ptid
);
3508 simple_verify_memory (struct target_ops
*ops
,
3509 const gdb_byte
*data
, CORE_ADDR lma
, ULONGEST size
)
3511 LONGEST total_xfered
= 0;
3513 while (total_xfered
< size
)
3515 ULONGEST xfered_len
;
3516 enum target_xfer_status status
;
3518 ULONGEST howmuch
= min (sizeof (buf
), size
- total_xfered
);
3520 status
= target_xfer_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
3521 buf
, NULL
, lma
+ total_xfered
, howmuch
,
3523 if (status
== TARGET_XFER_OK
3524 && memcmp (data
+ total_xfered
, buf
, xfered_len
) == 0)
3526 total_xfered
+= xfered_len
;
3535 /* Default implementation of memory verification. */
3538 default_verify_memory (struct target_ops
*self
,
3539 const gdb_byte
*data
, CORE_ADDR memaddr
, ULONGEST size
)
3541 /* Start over from the top of the target stack. */
3542 return simple_verify_memory (current_target
.beneath
,
3543 data
, memaddr
, size
);
3547 target_verify_memory (const gdb_byte
*data
, CORE_ADDR memaddr
, ULONGEST size
)
3549 return current_target
.to_verify_memory (¤t_target
,
3550 data
, memaddr
, size
);
3553 /* The documentation for this function is in its prototype declaration in
3557 target_insert_mask_watchpoint (CORE_ADDR addr
, CORE_ADDR mask
,
3558 enum target_hw_bp_type rw
)
3560 return current_target
.to_insert_mask_watchpoint (¤t_target
,
3564 /* The documentation for this function is in its prototype declaration in
3568 target_remove_mask_watchpoint (CORE_ADDR addr
, CORE_ADDR mask
,
3569 enum target_hw_bp_type rw
)
3571 return current_target
.to_remove_mask_watchpoint (¤t_target
,
3575 /* The documentation for this function is in its prototype declaration
3579 target_masked_watch_num_registers (CORE_ADDR addr
, CORE_ADDR mask
)
3581 return current_target
.to_masked_watch_num_registers (¤t_target
,
3585 /* The documentation for this function is in its prototype declaration
3589 target_ranged_break_num_registers (void)
3591 return current_target
.to_ranged_break_num_registers (¤t_target
);
3597 target_supports_btrace (enum btrace_format format
)
3599 return current_target
.to_supports_btrace (¤t_target
, format
);
3604 struct btrace_target_info
*
3605 target_enable_btrace (ptid_t ptid
, const struct btrace_config
*conf
)
3607 return current_target
.to_enable_btrace (¤t_target
, ptid
, conf
);
3613 target_disable_btrace (struct btrace_target_info
*btinfo
)
3615 current_target
.to_disable_btrace (¤t_target
, btinfo
);
3621 target_teardown_btrace (struct btrace_target_info
*btinfo
)
3623 current_target
.to_teardown_btrace (¤t_target
, btinfo
);
3629 target_read_btrace (struct btrace_data
*btrace
,
3630 struct btrace_target_info
*btinfo
,
3631 enum btrace_read_type type
)
3633 return current_target
.to_read_btrace (¤t_target
, btrace
, btinfo
, type
);
3638 const struct btrace_config
*
3639 target_btrace_conf (const struct btrace_target_info
*btinfo
)
3641 return current_target
.to_btrace_conf (¤t_target
, btinfo
);
3647 target_stop_recording (void)
3649 current_target
.to_stop_recording (¤t_target
);
3655 target_save_record (const char *filename
)
3657 current_target
.to_save_record (¤t_target
, filename
);
3663 target_supports_delete_record (void)
3665 struct target_ops
*t
;
3667 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3668 if (t
->to_delete_record
!= delegate_delete_record
3669 && t
->to_delete_record
!= tdefault_delete_record
)
3678 target_delete_record (void)
3680 current_target
.to_delete_record (¤t_target
);
3686 target_record_is_replaying (ptid_t ptid
)
3688 return current_target
.to_record_is_replaying (¤t_target
, ptid
);
3694 target_record_will_replay (ptid_t ptid
, int dir
)
3696 return current_target
.to_record_will_replay (¤t_target
, ptid
, dir
);
3702 target_record_stop_replaying (void)
3704 current_target
.to_record_stop_replaying (¤t_target
);
3710 target_goto_record_begin (void)
3712 current_target
.to_goto_record_begin (¤t_target
);
3718 target_goto_record_end (void)
3720 current_target
.to_goto_record_end (¤t_target
);
3726 target_goto_record (ULONGEST insn
)
3728 current_target
.to_goto_record (¤t_target
, insn
);
3734 target_insn_history (int size
, int flags
)
3736 current_target
.to_insn_history (¤t_target
, size
, flags
);
3742 target_insn_history_from (ULONGEST from
, int size
, int flags
)
3744 current_target
.to_insn_history_from (¤t_target
, from
, size
, flags
);
3750 target_insn_history_range (ULONGEST begin
, ULONGEST end
, int flags
)
3752 current_target
.to_insn_history_range (¤t_target
, begin
, end
, flags
);
3758 target_call_history (int size
, int flags
)
3760 current_target
.to_call_history (¤t_target
, size
, flags
);
3766 target_call_history_from (ULONGEST begin
, int size
, int flags
)
3768 current_target
.to_call_history_from (¤t_target
, begin
, size
, flags
);
3774 target_call_history_range (ULONGEST begin
, ULONGEST end
, int flags
)
3776 current_target
.to_call_history_range (¤t_target
, begin
, end
, flags
);
3781 const struct frame_unwind
*
3782 target_get_unwinder (void)
3784 return current_target
.to_get_unwinder (¤t_target
);
3789 const struct frame_unwind
*
3790 target_get_tailcall_unwinder (void)
3792 return current_target
.to_get_tailcall_unwinder (¤t_target
);
3798 target_prepare_to_generate_core (void)
3800 current_target
.to_prepare_to_generate_core (¤t_target
);
3806 target_done_generating_core (void)
3808 current_target
.to_done_generating_core (¤t_target
);
3812 setup_target_debug (void)
3814 memcpy (&debug_target
, ¤t_target
, sizeof debug_target
);
3816 init_debug_target (¤t_target
);
3820 static char targ_desc
[] =
3821 "Names of targets and files being debugged.\nShows the entire \
3822 stack of targets currently in use (including the exec-file,\n\
3823 core-file, and process, if any), as well as the symbol file name.";
3826 default_rcmd (struct target_ops
*self
, const char *command
,
3827 struct ui_file
*output
)
3829 error (_("\"monitor\" command not supported by this target."));
3833 do_monitor_command (char *cmd
,
3836 target_rcmd (cmd
, gdb_stdtarg
);
3839 /* Print the name of each layers of our target stack. */
3842 maintenance_print_target_stack (char *cmd
, int from_tty
)
3844 struct target_ops
*t
;
3846 printf_filtered (_("The current target stack is:\n"));
3848 for (t
= target_stack
; t
!= NULL
; t
= t
->beneath
)
3850 printf_filtered (" - %s (%s)\n", t
->to_shortname
, t
->to_longname
);
3857 target_async (int enable
)
3859 infrun_async (enable
);
3860 current_target
.to_async (¤t_target
, enable
);
3866 target_thread_events (int enable
)
3868 current_target
.to_thread_events (¤t_target
, enable
);
3871 /* Controls if targets can report that they can/are async. This is
3872 just for maintainers to use when debugging gdb. */
3873 int target_async_permitted
= 1;
3875 /* The set command writes to this variable. If the inferior is
3876 executing, target_async_permitted is *not* updated. */
3877 static int target_async_permitted_1
= 1;
3880 maint_set_target_async_command (char *args
, int from_tty
,
3881 struct cmd_list_element
*c
)
3883 if (have_live_inferiors ())
3885 target_async_permitted_1
= target_async_permitted
;
3886 error (_("Cannot change this setting while the inferior is running."));
3889 target_async_permitted
= target_async_permitted_1
;
3893 maint_show_target_async_command (struct ui_file
*file
, int from_tty
,
3894 struct cmd_list_element
*c
,
3897 fprintf_filtered (file
,
3898 _("Controlling the inferior in "
3899 "asynchronous mode is %s.\n"), value
);
3902 /* Return true if the target operates in non-stop mode even with "set
3906 target_always_non_stop_p (void)
3908 return current_target
.to_always_non_stop_p (¤t_target
);
3914 target_is_non_stop_p (void)
3917 || target_non_stop_enabled
== AUTO_BOOLEAN_TRUE
3918 || (target_non_stop_enabled
== AUTO_BOOLEAN_AUTO
3919 && target_always_non_stop_p ()));
3922 /* Controls if targets can report that they always run in non-stop
3923 mode. This is just for maintainers to use when debugging gdb. */
3924 enum auto_boolean target_non_stop_enabled
= AUTO_BOOLEAN_AUTO
;
3926 /* The set command writes to this variable. If the inferior is
3927 executing, target_non_stop_enabled is *not* updated. */
3928 static enum auto_boolean target_non_stop_enabled_1
= AUTO_BOOLEAN_AUTO
;
3930 /* Implementation of "maint set target-non-stop". */
3933 maint_set_target_non_stop_command (char *args
, int from_tty
,
3934 struct cmd_list_element
*c
)
3936 if (have_live_inferiors ())
3938 target_non_stop_enabled_1
= target_non_stop_enabled
;
3939 error (_("Cannot change this setting while the inferior is running."));
3942 target_non_stop_enabled
= target_non_stop_enabled_1
;
3945 /* Implementation of "maint show target-non-stop". */
3948 maint_show_target_non_stop_command (struct ui_file
*file
, int from_tty
,
3949 struct cmd_list_element
*c
,
3952 if (target_non_stop_enabled
== AUTO_BOOLEAN_AUTO
)
3953 fprintf_filtered (file
,
3954 _("Whether the target is always in non-stop mode "
3955 "is %s (currently %s).\n"), value
,
3956 target_always_non_stop_p () ? "on" : "off");
3958 fprintf_filtered (file
,
3959 _("Whether the target is always in non-stop mode "
3960 "is %s.\n"), value
);
3963 /* Temporary copies of permission settings. */
3965 static int may_write_registers_1
= 1;
3966 static int may_write_memory_1
= 1;
3967 static int may_insert_breakpoints_1
= 1;
3968 static int may_insert_tracepoints_1
= 1;
3969 static int may_insert_fast_tracepoints_1
= 1;
3970 static int may_stop_1
= 1;
3972 /* Make the user-set values match the real values again. */
3975 update_target_permissions (void)
3977 may_write_registers_1
= may_write_registers
;
3978 may_write_memory_1
= may_write_memory
;
3979 may_insert_breakpoints_1
= may_insert_breakpoints
;
3980 may_insert_tracepoints_1
= may_insert_tracepoints
;
3981 may_insert_fast_tracepoints_1
= may_insert_fast_tracepoints
;
3982 may_stop_1
= may_stop
;
3985 /* The one function handles (most of) the permission flags in the same
3989 set_target_permissions (char *args
, int from_tty
,
3990 struct cmd_list_element
*c
)
3992 if (target_has_execution
)
3994 update_target_permissions ();
3995 error (_("Cannot change this setting while the inferior is running."));
3998 /* Make the real values match the user-changed values. */
3999 may_write_registers
= may_write_registers_1
;
4000 may_insert_breakpoints
= may_insert_breakpoints_1
;
4001 may_insert_tracepoints
= may_insert_tracepoints_1
;
4002 may_insert_fast_tracepoints
= may_insert_fast_tracepoints_1
;
4003 may_stop
= may_stop_1
;
4004 update_observer_mode ();
4007 /* Set memory write permission independently of observer mode. */
4010 set_write_memory_permission (char *args
, int from_tty
,
4011 struct cmd_list_element
*c
)
4013 /* Make the real values match the user-changed values. */
4014 may_write_memory
= may_write_memory_1
;
4015 update_observer_mode ();
4020 initialize_targets (void)
4022 init_dummy_target ();
4023 push_target (&dummy_target
);
4025 add_info ("target", target_info
, targ_desc
);
4026 add_info ("files", target_info
, targ_desc
);
4028 add_setshow_zuinteger_cmd ("target", class_maintenance
, &targetdebug
, _("\
4029 Set target debugging."), _("\
4030 Show target debugging."), _("\
4031 When non-zero, target debugging is enabled. Higher numbers are more\n\
4035 &setdebuglist
, &showdebuglist
);
4037 add_setshow_boolean_cmd ("trust-readonly-sections", class_support
,
4038 &trust_readonly
, _("\
4039 Set mode for reading from readonly sections."), _("\
4040 Show mode for reading from readonly sections."), _("\
4041 When this mode is on, memory reads from readonly sections (such as .text)\n\
4042 will be read from the object file instead of from the target. This will\n\
4043 result in significant performance improvement for remote targets."),
4045 show_trust_readonly
,
4046 &setlist
, &showlist
);
4048 add_com ("monitor", class_obscure
, do_monitor_command
,
4049 _("Send a command to the remote monitor (remote targets only)."));
4051 add_cmd ("target-stack", class_maintenance
, maintenance_print_target_stack
,
4052 _("Print the name of each layer of the internal target stack."),
4053 &maintenanceprintlist
);
4055 add_setshow_boolean_cmd ("target-async", no_class
,
4056 &target_async_permitted_1
, _("\
4057 Set whether gdb controls the inferior in asynchronous mode."), _("\
4058 Show whether gdb controls the inferior in asynchronous mode."), _("\
4059 Tells gdb whether to control the inferior in asynchronous mode."),
4060 maint_set_target_async_command
,
4061 maint_show_target_async_command
,
4062 &maintenance_set_cmdlist
,
4063 &maintenance_show_cmdlist
);
4065 add_setshow_auto_boolean_cmd ("target-non-stop", no_class
,
4066 &target_non_stop_enabled_1
, _("\
4067 Set whether gdb always controls the inferior in non-stop mode."), _("\
4068 Show whether gdb always controls the inferior in non-stop mode."), _("\
4069 Tells gdb whether to control the inferior in non-stop mode."),
4070 maint_set_target_non_stop_command
,
4071 maint_show_target_non_stop_command
,
4072 &maintenance_set_cmdlist
,
4073 &maintenance_show_cmdlist
);
4075 add_setshow_boolean_cmd ("may-write-registers", class_support
,
4076 &may_write_registers_1
, _("\
4077 Set permission to write into registers."), _("\
4078 Show permission to write into registers."), _("\
4079 When this permission is on, GDB may write into the target's registers.\n\
4080 Otherwise, any sort of write attempt will result in an error."),
4081 set_target_permissions
, NULL
,
4082 &setlist
, &showlist
);
4084 add_setshow_boolean_cmd ("may-write-memory", class_support
,
4085 &may_write_memory_1
, _("\
4086 Set permission to write into target memory."), _("\
4087 Show permission to write into target memory."), _("\
4088 When this permission is on, GDB may write into the target's memory.\n\
4089 Otherwise, any sort of write attempt will result in an error."),
4090 set_write_memory_permission
, NULL
,
4091 &setlist
, &showlist
);
4093 add_setshow_boolean_cmd ("may-insert-breakpoints", class_support
,
4094 &may_insert_breakpoints_1
, _("\
4095 Set permission to insert breakpoints in the target."), _("\
4096 Show permission to insert breakpoints in the target."), _("\
4097 When this permission is on, GDB may insert breakpoints in the program.\n\
4098 Otherwise, any sort of insertion attempt will result in an error."),
4099 set_target_permissions
, NULL
,
4100 &setlist
, &showlist
);
4102 add_setshow_boolean_cmd ("may-insert-tracepoints", class_support
,
4103 &may_insert_tracepoints_1
, _("\
4104 Set permission to insert tracepoints in the target."), _("\
4105 Show permission to insert tracepoints in the target."), _("\
4106 When this permission is on, GDB may insert tracepoints in the program.\n\
4107 Otherwise, any sort of insertion attempt will result in an error."),
4108 set_target_permissions
, NULL
,
4109 &setlist
, &showlist
);
4111 add_setshow_boolean_cmd ("may-insert-fast-tracepoints", class_support
,
4112 &may_insert_fast_tracepoints_1
, _("\
4113 Set permission to insert fast tracepoints in the target."), _("\
4114 Show permission to insert fast tracepoints in the target."), _("\
4115 When this permission is on, GDB may insert fast tracepoints.\n\
4116 Otherwise, any sort of insertion attempt will result in an error."),
4117 set_target_permissions
, NULL
,
4118 &setlist
, &showlist
);
4120 add_setshow_boolean_cmd ("may-interrupt", class_support
,
4122 Set permission to interrupt or signal the target."), _("\
4123 Show permission to interrupt or signal the target."), _("\
4124 When this permission is on, GDB may interrupt/stop the target's execution.\n\
4125 Otherwise, any attempt to interrupt or stop will be ignored."),
4126 set_target_permissions
, NULL
,
4127 &setlist
, &showlist
);
4129 add_setshow_boolean_cmd ("auto-connect-native-target", class_support
,
4130 &auto_connect_native_target
, _("\
4131 Set whether GDB may automatically connect to the native target."), _("\
4132 Show whether GDB may automatically connect to the native target."), _("\
4133 When on, and GDB is not connected to a target yet, GDB\n\
4134 attempts \"run\" and other commands with the native target."),
4135 NULL
, show_auto_connect_native_target
,
4136 &setlist
, &showlist
);