1 /* Select target systems and architectures at runtime for GDB.
3 Copyright (C) 1990-2015 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_inferior (void)
472 /* A background resume (``run&'') should leave GDB in control of the
473 terminal. Use target_can_async_p, not target_is_async_p, since at
474 this point the target is not async yet. However, if sync_execution
475 is not set, we know it will become async prior to resume. */
476 if (target_can_async_p () && !sync_execution
)
479 if (terminal_state
== terminal_is_inferior
)
482 /* If GDB is resuming the inferior in the foreground, install
483 inferior's terminal modes. */
484 (*current_target
.to_terminal_inferior
) (¤t_target
);
485 terminal_state
= terminal_is_inferior
;
491 target_terminal_ours (void)
493 if (terminal_state
== terminal_is_ours
)
496 (*current_target
.to_terminal_ours
) (¤t_target
);
497 terminal_state
= terminal_is_ours
;
503 target_terminal_ours_for_output (void)
505 if (terminal_state
!= terminal_is_inferior
)
507 (*current_target
.to_terminal_ours_for_output
) (¤t_target
);
508 terminal_state
= terminal_is_ours_for_output
;
514 target_supports_terminal_ours (void)
516 struct target_ops
*t
;
518 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
520 if (t
->to_terminal_ours
!= delegate_terminal_ours
521 && t
->to_terminal_ours
!= tdefault_terminal_ours
)
528 /* Restore the terminal to its previous state (helper for
529 make_cleanup_restore_target_terminal). */
532 cleanup_restore_target_terminal (void *arg
)
534 enum terminal_state
*previous_state
= (enum terminal_state
*) arg
;
536 switch (*previous_state
)
538 case terminal_is_ours
:
539 target_terminal_ours ();
541 case terminal_is_ours_for_output
:
542 target_terminal_ours_for_output ();
544 case terminal_is_inferior
:
545 target_terminal_inferior ();
553 make_cleanup_restore_target_terminal (void)
555 enum terminal_state
*ts
= XNEW (enum terminal_state
);
557 *ts
= terminal_state
;
559 return make_cleanup_dtor (cleanup_restore_target_terminal
, ts
, xfree
);
565 error (_("You can't do that when your target is `%s'"),
566 current_target
.to_shortname
);
572 error (_("You can't do that without a process to debug."));
576 default_terminal_info (struct target_ops
*self
, const char *args
, int from_tty
)
578 printf_unfiltered (_("No saved terminal information.\n"));
581 /* A default implementation for the to_get_ada_task_ptid target method.
583 This function builds the PTID by using both LWP and TID as part of
584 the PTID lwp and tid elements. The pid used is the pid of the
588 default_get_ada_task_ptid (struct target_ops
*self
, long lwp
, long tid
)
590 return ptid_build (ptid_get_pid (inferior_ptid
), lwp
, tid
);
593 static enum exec_direction_kind
594 default_execution_direction (struct target_ops
*self
)
596 if (!target_can_execute_reverse
)
598 else if (!target_can_async_p ())
601 gdb_assert_not_reached ("\
602 to_execution_direction must be implemented for reverse async");
605 /* Go through the target stack from top to bottom, copying over zero
606 entries in current_target, then filling in still empty entries. In
607 effect, we are doing class inheritance through the pushed target
610 NOTE: cagney/2003-10-17: The problem with this inheritance, as it
611 is currently implemented, is that it discards any knowledge of
612 which target an inherited method originally belonged to.
613 Consequently, new new target methods should instead explicitly and
614 locally search the target stack for the target that can handle the
618 update_current_target (void)
620 struct target_ops
*t
;
622 /* First, reset current's contents. */
623 memset (¤t_target
, 0, sizeof (current_target
));
625 /* Install the delegators. */
626 install_delegators (¤t_target
);
628 current_target
.to_stratum
= target_stack
->to_stratum
;
630 #define INHERIT(FIELD, TARGET) \
631 if (!current_target.FIELD) \
632 current_target.FIELD = (TARGET)->FIELD
634 /* Do not add any new INHERITs here. Instead, use the delegation
635 mechanism provided by make-target-delegates. */
636 for (t
= target_stack
; t
; t
= t
->beneath
)
638 INHERIT (to_shortname
, t
);
639 INHERIT (to_longname
, t
);
640 INHERIT (to_attach_no_wait
, t
);
641 INHERIT (to_have_steppable_watchpoint
, t
);
642 INHERIT (to_have_continuable_watchpoint
, t
);
643 INHERIT (to_has_thread_control
, t
);
647 /* Finally, position the target-stack beneath the squashed
648 "current_target". That way code looking for a non-inherited
649 target method can quickly and simply find it. */
650 current_target
.beneath
= target_stack
;
653 setup_target_debug ();
656 /* Push a new target type into the stack of the existing target accessors,
657 possibly superseding some of the existing accessors.
659 Rather than allow an empty stack, we always have the dummy target at
660 the bottom stratum, so we can call the function vectors without
664 push_target (struct target_ops
*t
)
666 struct target_ops
**cur
;
668 /* Check magic number. If wrong, it probably means someone changed
669 the struct definition, but not all the places that initialize one. */
670 if (t
->to_magic
!= OPS_MAGIC
)
672 fprintf_unfiltered (gdb_stderr
,
673 "Magic number of %s target struct wrong\n",
675 internal_error (__FILE__
, __LINE__
,
676 _("failed internal consistency check"));
679 /* Find the proper stratum to install this target in. */
680 for (cur
= &target_stack
; (*cur
) != NULL
; cur
= &(*cur
)->beneath
)
682 if ((int) (t
->to_stratum
) >= (int) (*cur
)->to_stratum
)
686 /* If there's already targets at this stratum, remove them. */
687 /* FIXME: cagney/2003-10-15: I think this should be popping all
688 targets to CUR, and not just those at this stratum level. */
689 while ((*cur
) != NULL
&& t
->to_stratum
== (*cur
)->to_stratum
)
691 /* There's already something at this stratum level. Close it,
692 and un-hook it from the stack. */
693 struct target_ops
*tmp
= (*cur
);
695 (*cur
) = (*cur
)->beneath
;
700 /* We have removed all targets in our stratum, now add the new one. */
704 update_current_target ();
707 /* Remove a target_ops vector from the stack, wherever it may be.
708 Return how many times it was removed (0 or 1). */
711 unpush_target (struct target_ops
*t
)
713 struct target_ops
**cur
;
714 struct target_ops
*tmp
;
716 if (t
->to_stratum
== dummy_stratum
)
717 internal_error (__FILE__
, __LINE__
,
718 _("Attempt to unpush the dummy target"));
720 /* Look for the specified target. Note that we assume that a target
721 can only occur once in the target stack. */
723 for (cur
= &target_stack
; (*cur
) != NULL
; cur
= &(*cur
)->beneath
)
729 /* If we don't find target_ops, quit. Only open targets should be
734 /* Unchain the target. */
736 (*cur
) = (*cur
)->beneath
;
739 update_current_target ();
741 /* Finally close the target. Note we do this after unchaining, so
742 any target method calls from within the target_close
743 implementation don't end up in T anymore. */
749 /* Unpush TARGET and assert that it worked. */
752 unpush_target_and_assert (struct target_ops
*target
)
754 if (!unpush_target (target
))
756 fprintf_unfiltered (gdb_stderr
,
757 "pop_all_targets couldn't find target %s\n",
758 target
->to_shortname
);
759 internal_error (__FILE__
, __LINE__
,
760 _("failed internal consistency check"));
765 pop_all_targets_above (enum strata above_stratum
)
767 while ((int) (current_target
.to_stratum
) > (int) above_stratum
)
768 unpush_target_and_assert (target_stack
);
774 pop_all_targets_at_and_above (enum strata stratum
)
776 while ((int) (current_target
.to_stratum
) >= (int) stratum
)
777 unpush_target_and_assert (target_stack
);
781 pop_all_targets (void)
783 pop_all_targets_above (dummy_stratum
);
786 /* Return 1 if T is now pushed in the target stack. Return 0 otherwise. */
789 target_is_pushed (struct target_ops
*t
)
791 struct target_ops
*cur
;
793 /* Check magic number. If wrong, it probably means someone changed
794 the struct definition, but not all the places that initialize one. */
795 if (t
->to_magic
!= OPS_MAGIC
)
797 fprintf_unfiltered (gdb_stderr
,
798 "Magic number of %s target struct wrong\n",
800 internal_error (__FILE__
, __LINE__
,
801 _("failed internal consistency check"));
804 for (cur
= target_stack
; cur
!= NULL
; cur
= cur
->beneath
)
811 /* Default implementation of to_get_thread_local_address. */
814 generic_tls_error (void)
816 throw_error (TLS_GENERIC_ERROR
,
817 _("Cannot find thread-local variables on this target"));
820 /* Using the objfile specified in OBJFILE, find the address for the
821 current thread's thread-local storage with offset OFFSET. */
823 target_translate_tls_address (struct objfile
*objfile
, CORE_ADDR offset
)
825 volatile CORE_ADDR addr
= 0;
826 struct target_ops
*target
= ¤t_target
;
828 if (gdbarch_fetch_tls_load_module_address_p (target_gdbarch ()))
830 ptid_t ptid
= inferior_ptid
;
836 /* Fetch the load module address for this objfile. */
837 lm_addr
= gdbarch_fetch_tls_load_module_address (target_gdbarch (),
840 addr
= target
->to_get_thread_local_address (target
, ptid
,
843 /* If an error occurred, print TLS related messages here. Otherwise,
844 throw the error to some higher catcher. */
845 CATCH (ex
, RETURN_MASK_ALL
)
847 int objfile_is_library
= (objfile
->flags
& OBJF_SHARED
);
851 case TLS_NO_LIBRARY_SUPPORT_ERROR
:
852 error (_("Cannot find thread-local variables "
853 "in this thread library."));
855 case TLS_LOAD_MODULE_NOT_FOUND_ERROR
:
856 if (objfile_is_library
)
857 error (_("Cannot find shared library `%s' in dynamic"
858 " linker's load module list"), objfile_name (objfile
));
860 error (_("Cannot find executable file `%s' in dynamic"
861 " linker's load module list"), objfile_name (objfile
));
863 case TLS_NOT_ALLOCATED_YET_ERROR
:
864 if (objfile_is_library
)
865 error (_("The inferior has not yet allocated storage for"
866 " thread-local variables in\n"
867 "the shared library `%s'\n"
869 objfile_name (objfile
), target_pid_to_str (ptid
));
871 error (_("The inferior has not yet allocated storage for"
872 " thread-local variables in\n"
873 "the executable `%s'\n"
875 objfile_name (objfile
), target_pid_to_str (ptid
));
877 case TLS_GENERIC_ERROR
:
878 if (objfile_is_library
)
879 error (_("Cannot find thread-local storage for %s, "
880 "shared library %s:\n%s"),
881 target_pid_to_str (ptid
),
882 objfile_name (objfile
), ex
.message
);
884 error (_("Cannot find thread-local storage for %s, "
885 "executable file %s:\n%s"),
886 target_pid_to_str (ptid
),
887 objfile_name (objfile
), ex
.message
);
890 throw_exception (ex
);
896 /* It wouldn't be wrong here to try a gdbarch method, too; finding
897 TLS is an ABI-specific thing. But we don't do that yet. */
899 error (_("Cannot find thread-local variables on this target"));
905 target_xfer_status_to_string (enum target_xfer_status status
)
907 #define CASE(X) case X: return #X
910 CASE(TARGET_XFER_E_IO
);
911 CASE(TARGET_XFER_UNAVAILABLE
);
920 #define MIN(A, B) (((A) <= (B)) ? (A) : (B))
922 /* target_read_string -- read a null terminated string, up to LEN bytes,
923 from MEMADDR in target. Set *ERRNOP to the errno code, or 0 if successful.
924 Set *STRING to a pointer to malloc'd memory containing the data; the caller
925 is responsible for freeing it. Return the number of bytes successfully
929 target_read_string (CORE_ADDR memaddr
, char **string
, int len
, int *errnop
)
935 int buffer_allocated
;
937 unsigned int nbytes_read
= 0;
941 /* Small for testing. */
942 buffer_allocated
= 4;
943 buffer
= (char *) xmalloc (buffer_allocated
);
948 tlen
= MIN (len
, 4 - (memaddr
& 3));
949 offset
= memaddr
& 3;
951 errcode
= target_read_memory (memaddr
& ~3, buf
, sizeof buf
);
954 /* The transfer request might have crossed the boundary to an
955 unallocated region of memory. Retry the transfer, requesting
959 errcode
= target_read_memory (memaddr
, buf
, 1);
964 if (bufptr
- buffer
+ tlen
> buffer_allocated
)
968 bytes
= bufptr
- buffer
;
969 buffer_allocated
*= 2;
970 buffer
= (char *) xrealloc (buffer
, buffer_allocated
);
971 bufptr
= buffer
+ bytes
;
974 for (i
= 0; i
< tlen
; i
++)
976 *bufptr
++ = buf
[i
+ offset
];
977 if (buf
[i
+ offset
] == '\000')
979 nbytes_read
+= i
+ 1;
995 struct target_section_table
*
996 target_get_section_table (struct target_ops
*target
)
998 return (*target
->to_get_section_table
) (target
);
1001 /* Find a section containing ADDR. */
1003 struct target_section
*
1004 target_section_by_addr (struct target_ops
*target
, CORE_ADDR addr
)
1006 struct target_section_table
*table
= target_get_section_table (target
);
1007 struct target_section
*secp
;
1012 for (secp
= table
->sections
; secp
< table
->sections_end
; secp
++)
1014 if (addr
>= secp
->addr
&& addr
< secp
->endaddr
)
1021 /* Helper for the memory xfer routines. Checks the attributes of the
1022 memory region of MEMADDR against the read or write being attempted.
1023 If the access is permitted returns true, otherwise returns false.
1024 REGION_P is an optional output parameter. If not-NULL, it is
1025 filled with a pointer to the memory region of MEMADDR. REG_LEN
1026 returns LEN trimmed to the end of the region. This is how much the
1027 caller can continue requesting, if the access is permitted. A
1028 single xfer request must not straddle memory region boundaries. */
1031 memory_xfer_check_region (gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1032 ULONGEST memaddr
, ULONGEST len
, ULONGEST
*reg_len
,
1033 struct mem_region
**region_p
)
1035 struct mem_region
*region
;
1037 region
= lookup_mem_region (memaddr
);
1039 if (region_p
!= NULL
)
1042 switch (region
->attrib
.mode
)
1045 if (writebuf
!= NULL
)
1050 if (readbuf
!= NULL
)
1055 /* We only support writing to flash during "load" for now. */
1056 if (writebuf
!= NULL
)
1057 error (_("Writing to flash memory forbidden in this context"));
1064 /* region->hi == 0 means there's no upper bound. */
1065 if (memaddr
+ len
< region
->hi
|| region
->hi
== 0)
1068 *reg_len
= region
->hi
- memaddr
;
1073 /* Read memory from more than one valid target. A core file, for
1074 instance, could have some of memory but delegate other bits to
1075 the target below it. So, we must manually try all targets. */
1077 enum target_xfer_status
1078 raw_memory_xfer_partial (struct target_ops
*ops
, gdb_byte
*readbuf
,
1079 const gdb_byte
*writebuf
, ULONGEST memaddr
, LONGEST len
,
1080 ULONGEST
*xfered_len
)
1082 enum target_xfer_status res
;
1086 res
= ops
->to_xfer_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1087 readbuf
, writebuf
, memaddr
, len
,
1089 if (res
== TARGET_XFER_OK
)
1092 /* Stop if the target reports that the memory is not available. */
1093 if (res
== TARGET_XFER_UNAVAILABLE
)
1096 /* We want to continue past core files to executables, but not
1097 past a running target's memory. */
1098 if (ops
->to_has_all_memory (ops
))
1103 while (ops
!= NULL
);
1105 /* The cache works at the raw memory level. Make sure the cache
1106 gets updated with raw contents no matter what kind of memory
1107 object was originally being written. Note we do write-through
1108 first, so that if it fails, we don't write to the cache contents
1109 that never made it to the target. */
1110 if (writebuf
!= NULL
1111 && !ptid_equal (inferior_ptid
, null_ptid
)
1112 && target_dcache_init_p ()
1113 && (stack_cache_enabled_p () || code_cache_enabled_p ()))
1115 DCACHE
*dcache
= target_dcache_get ();
1117 /* Note that writing to an area of memory which wasn't present
1118 in the cache doesn't cause it to be loaded in. */
1119 dcache_update (dcache
, res
, memaddr
, writebuf
, *xfered_len
);
1125 /* Perform a partial memory transfer.
1126 For docs see target.h, to_xfer_partial. */
1128 static enum target_xfer_status
1129 memory_xfer_partial_1 (struct target_ops
*ops
, enum target_object object
,
1130 gdb_byte
*readbuf
, const gdb_byte
*writebuf
, ULONGEST memaddr
,
1131 ULONGEST len
, ULONGEST
*xfered_len
)
1133 enum target_xfer_status res
;
1135 struct mem_region
*region
;
1136 struct inferior
*inf
;
1138 /* For accesses to unmapped overlay sections, read directly from
1139 files. Must do this first, as MEMADDR may need adjustment. */
1140 if (readbuf
!= NULL
&& overlay_debugging
)
1142 struct obj_section
*section
= find_pc_overlay (memaddr
);
1144 if (pc_in_unmapped_range (memaddr
, section
))
1146 struct target_section_table
*table
1147 = target_get_section_table (ops
);
1148 const char *section_name
= section
->the_bfd_section
->name
;
1150 memaddr
= overlay_mapped_address (memaddr
, section
);
1151 return section_table_xfer_memory_partial (readbuf
, writebuf
,
1152 memaddr
, len
, xfered_len
,
1154 table
->sections_end
,
1159 /* Try the executable files, if "trust-readonly-sections" is set. */
1160 if (readbuf
!= NULL
&& trust_readonly
)
1162 struct target_section
*secp
;
1163 struct target_section_table
*table
;
1165 secp
= target_section_by_addr (ops
, memaddr
);
1167 && (bfd_get_section_flags (secp
->the_bfd_section
->owner
,
1168 secp
->the_bfd_section
)
1171 table
= target_get_section_table (ops
);
1172 return section_table_xfer_memory_partial (readbuf
, writebuf
,
1173 memaddr
, len
, xfered_len
,
1175 table
->sections_end
,
1180 /* Try GDB's internal data cache. */
1182 if (!memory_xfer_check_region (readbuf
, writebuf
, memaddr
, len
, ®_len
,
1184 return TARGET_XFER_E_IO
;
1186 if (!ptid_equal (inferior_ptid
, null_ptid
))
1187 inf
= find_inferior_ptid (inferior_ptid
);
1193 /* The dcache reads whole cache lines; that doesn't play well
1194 with reading from a trace buffer, because reading outside of
1195 the collected memory range fails. */
1196 && get_traceframe_number () == -1
1197 && (region
->attrib
.cache
1198 || (stack_cache_enabled_p () && object
== TARGET_OBJECT_STACK_MEMORY
)
1199 || (code_cache_enabled_p () && object
== TARGET_OBJECT_CODE_MEMORY
)))
1201 DCACHE
*dcache
= target_dcache_get_or_init ();
1203 return dcache_read_memory_partial (ops
, dcache
, memaddr
, readbuf
,
1204 reg_len
, xfered_len
);
1207 /* If none of those methods found the memory we wanted, fall back
1208 to a target partial transfer. Normally a single call to
1209 to_xfer_partial is enough; if it doesn't recognize an object
1210 it will call the to_xfer_partial of the next target down.
1211 But for memory this won't do. Memory is the only target
1212 object which can be read from more than one valid target.
1213 A core file, for instance, could have some of memory but
1214 delegate other bits to the target below it. So, we must
1215 manually try all targets. */
1217 res
= raw_memory_xfer_partial (ops
, readbuf
, writebuf
, memaddr
, reg_len
,
1220 /* If we still haven't got anything, return the last error. We
1225 /* Perform a partial memory transfer. For docs see target.h,
1228 static enum target_xfer_status
1229 memory_xfer_partial (struct target_ops
*ops
, enum target_object object
,
1230 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1231 ULONGEST memaddr
, ULONGEST len
, ULONGEST
*xfered_len
)
1233 enum target_xfer_status res
;
1235 /* Zero length requests are ok and require no work. */
1237 return TARGET_XFER_EOF
;
1239 /* Fill in READBUF with breakpoint shadows, or WRITEBUF with
1240 breakpoint insns, thus hiding out from higher layers whether
1241 there are software breakpoints inserted in the code stream. */
1242 if (readbuf
!= NULL
)
1244 res
= memory_xfer_partial_1 (ops
, object
, readbuf
, NULL
, memaddr
, len
,
1247 if (res
== TARGET_XFER_OK
&& !show_memory_breakpoints
)
1248 breakpoint_xfer_memory (readbuf
, NULL
, NULL
, memaddr
, *xfered_len
);
1253 struct cleanup
*old_chain
;
1255 /* A large write request is likely to be partially satisfied
1256 by memory_xfer_partial_1. We will continually malloc
1257 and free a copy of the entire write request for breakpoint
1258 shadow handling even though we only end up writing a small
1259 subset of it. Cap writes to 4KB to mitigate this. */
1260 len
= min (4096, len
);
1262 buf
= (gdb_byte
*) xmalloc (len
);
1263 old_chain
= make_cleanup (xfree
, buf
);
1264 memcpy (buf
, writebuf
, len
);
1266 breakpoint_xfer_memory (NULL
, buf
, writebuf
, memaddr
, len
);
1267 res
= memory_xfer_partial_1 (ops
, object
, NULL
, buf
, memaddr
, len
,
1270 do_cleanups (old_chain
);
1277 restore_show_memory_breakpoints (void *arg
)
1279 show_memory_breakpoints
= (uintptr_t) arg
;
1283 make_show_memory_breakpoints_cleanup (int show
)
1285 int current
= show_memory_breakpoints
;
1287 show_memory_breakpoints
= show
;
1288 return make_cleanup (restore_show_memory_breakpoints
,
1289 (void *) (uintptr_t) current
);
1292 /* For docs see target.h, to_xfer_partial. */
1294 enum target_xfer_status
1295 target_xfer_partial (struct target_ops
*ops
,
1296 enum target_object object
, const char *annex
,
1297 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1298 ULONGEST offset
, ULONGEST len
,
1299 ULONGEST
*xfered_len
)
1301 enum target_xfer_status retval
;
1303 gdb_assert (ops
->to_xfer_partial
!= NULL
);
1305 /* Transfer is done when LEN is zero. */
1307 return TARGET_XFER_EOF
;
1309 if (writebuf
&& !may_write_memory
)
1310 error (_("Writing to memory is not allowed (addr %s, len %s)"),
1311 core_addr_to_string_nz (offset
), plongest (len
));
1315 /* If this is a memory transfer, let the memory-specific code
1316 have a look at it instead. Memory transfers are more
1318 if (object
== TARGET_OBJECT_MEMORY
|| object
== TARGET_OBJECT_STACK_MEMORY
1319 || object
== TARGET_OBJECT_CODE_MEMORY
)
1320 retval
= memory_xfer_partial (ops
, object
, readbuf
,
1321 writebuf
, offset
, len
, xfered_len
);
1322 else if (object
== TARGET_OBJECT_RAW_MEMORY
)
1324 /* Skip/avoid accessing the target if the memory region
1325 attributes block the access. Check this here instead of in
1326 raw_memory_xfer_partial as otherwise we'd end up checking
1327 this twice in the case of the memory_xfer_partial path is
1328 taken; once before checking the dcache, and another in the
1329 tail call to raw_memory_xfer_partial. */
1330 if (!memory_xfer_check_region (readbuf
, writebuf
, offset
, len
, &len
,
1332 return TARGET_XFER_E_IO
;
1334 /* Request the normal memory object from other layers. */
1335 retval
= raw_memory_xfer_partial (ops
, readbuf
, writebuf
, offset
, len
,
1339 retval
= ops
->to_xfer_partial (ops
, object
, annex
, readbuf
,
1340 writebuf
, offset
, len
, xfered_len
);
1344 const unsigned char *myaddr
= NULL
;
1346 fprintf_unfiltered (gdb_stdlog
,
1347 "%s:target_xfer_partial "
1348 "(%d, %s, %s, %s, %s, %s) = %d, %s",
1351 (annex
? annex
: "(null)"),
1352 host_address_to_string (readbuf
),
1353 host_address_to_string (writebuf
),
1354 core_addr_to_string_nz (offset
),
1355 pulongest (len
), retval
,
1356 pulongest (*xfered_len
));
1362 if (retval
== TARGET_XFER_OK
&& myaddr
!= NULL
)
1366 fputs_unfiltered (", bytes =", gdb_stdlog
);
1367 for (i
= 0; i
< *xfered_len
; i
++)
1369 if ((((intptr_t) &(myaddr
[i
])) & 0xf) == 0)
1371 if (targetdebug
< 2 && i
> 0)
1373 fprintf_unfiltered (gdb_stdlog
, " ...");
1376 fprintf_unfiltered (gdb_stdlog
, "\n");
1379 fprintf_unfiltered (gdb_stdlog
, " %02x", myaddr
[i
] & 0xff);
1383 fputc_unfiltered ('\n', gdb_stdlog
);
1386 /* Check implementations of to_xfer_partial update *XFERED_LEN
1387 properly. Do assertion after printing debug messages, so that we
1388 can find more clues on assertion failure from debugging messages. */
1389 if (retval
== TARGET_XFER_OK
|| retval
== TARGET_XFER_UNAVAILABLE
)
1390 gdb_assert (*xfered_len
> 0);
1395 /* Read LEN bytes of target memory at address MEMADDR, placing the
1396 results in GDB's memory at MYADDR. Returns either 0 for success or
1397 -1 if any error occurs.
1399 If an error occurs, no guarantee is made about the contents of the data at
1400 MYADDR. In particular, the caller should not depend upon partial reads
1401 filling the buffer with good data. There is no way for the caller to know
1402 how much good data might have been transfered anyway. Callers that can
1403 deal with partial reads should call target_read (which will retry until
1404 it makes no progress, and then return how much was transferred). */
1407 target_read_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1409 /* Dispatch to the topmost target, not the flattened current_target.
1410 Memory accesses check target->to_has_(all_)memory, and the
1411 flattened target doesn't inherit those. */
1412 if (target_read (current_target
.beneath
, TARGET_OBJECT_MEMORY
, NULL
,
1413 myaddr
, memaddr
, len
) == len
)
1419 /* See target/target.h. */
1422 target_read_uint32 (CORE_ADDR memaddr
, uint32_t *result
)
1427 r
= target_read_memory (memaddr
, buf
, sizeof buf
);
1430 *result
= extract_unsigned_integer (buf
, sizeof buf
,
1431 gdbarch_byte_order (target_gdbarch ()));
1435 /* Like target_read_memory, but specify explicitly that this is a read
1436 from the target's raw memory. That is, this read bypasses the
1437 dcache, breakpoint shadowing, etc. */
1440 target_read_raw_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1442 /* See comment in target_read_memory about why the request starts at
1443 current_target.beneath. */
1444 if (target_read (current_target
.beneath
, TARGET_OBJECT_RAW_MEMORY
, NULL
,
1445 myaddr
, memaddr
, len
) == len
)
1451 /* Like target_read_memory, but specify explicitly that this is a read from
1452 the target's stack. This may trigger different cache behavior. */
1455 target_read_stack (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1457 /* See comment in target_read_memory about why the request starts at
1458 current_target.beneath. */
1459 if (target_read (current_target
.beneath
, TARGET_OBJECT_STACK_MEMORY
, NULL
,
1460 myaddr
, memaddr
, len
) == len
)
1466 /* Like target_read_memory, but specify explicitly that this is a read from
1467 the target's code. This may trigger different cache behavior. */
1470 target_read_code (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1472 /* See comment in target_read_memory about why the request starts at
1473 current_target.beneath. */
1474 if (target_read (current_target
.beneath
, TARGET_OBJECT_CODE_MEMORY
, NULL
,
1475 myaddr
, memaddr
, len
) == len
)
1481 /* Write LEN bytes from MYADDR to target memory at address MEMADDR.
1482 Returns either 0 for success or -1 if any error occurs. If an
1483 error occurs, no guarantee is made about how much data got written.
1484 Callers that can deal with partial writes should call
1488 target_write_memory (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ssize_t len
)
1490 /* See comment in target_read_memory about why the request starts at
1491 current_target.beneath. */
1492 if (target_write (current_target
.beneath
, TARGET_OBJECT_MEMORY
, NULL
,
1493 myaddr
, memaddr
, len
) == len
)
1499 /* Write LEN bytes from MYADDR to target raw memory at address
1500 MEMADDR. Returns either 0 for success or -1 if any error occurs.
1501 If an error occurs, no guarantee is made about how much data got
1502 written. Callers that can deal with partial writes should call
1506 target_write_raw_memory (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ssize_t len
)
1508 /* See comment in target_read_memory about why the request starts at
1509 current_target.beneath. */
1510 if (target_write (current_target
.beneath
, TARGET_OBJECT_RAW_MEMORY
, NULL
,
1511 myaddr
, memaddr
, len
) == len
)
1517 /* Fetch the target's memory map. */
1520 target_memory_map (void)
1522 VEC(mem_region_s
) *result
;
1523 struct mem_region
*last_one
, *this_one
;
1525 struct target_ops
*t
;
1527 result
= current_target
.to_memory_map (¤t_target
);
1531 qsort (VEC_address (mem_region_s
, result
),
1532 VEC_length (mem_region_s
, result
),
1533 sizeof (struct mem_region
), mem_region_cmp
);
1535 /* Check that regions do not overlap. Simultaneously assign
1536 a numbering for the "mem" commands to use to refer to
1539 for (ix
= 0; VEC_iterate (mem_region_s
, result
, ix
, this_one
); ix
++)
1541 this_one
->number
= ix
;
1543 if (last_one
&& last_one
->hi
> this_one
->lo
)
1545 warning (_("Overlapping regions in memory map: ignoring"));
1546 VEC_free (mem_region_s
, result
);
1549 last_one
= this_one
;
1556 target_flash_erase (ULONGEST address
, LONGEST length
)
1558 current_target
.to_flash_erase (¤t_target
, address
, length
);
1562 target_flash_done (void)
1564 current_target
.to_flash_done (¤t_target
);
1568 show_trust_readonly (struct ui_file
*file
, int from_tty
,
1569 struct cmd_list_element
*c
, const char *value
)
1571 fprintf_filtered (file
,
1572 _("Mode for reading from readonly sections is %s.\n"),
1576 /* Target vector read/write partial wrapper functions. */
1578 static enum target_xfer_status
1579 target_read_partial (struct target_ops
*ops
,
1580 enum target_object object
,
1581 const char *annex
, gdb_byte
*buf
,
1582 ULONGEST offset
, ULONGEST len
,
1583 ULONGEST
*xfered_len
)
1585 return target_xfer_partial (ops
, object
, annex
, buf
, NULL
, offset
, len
,
1589 static enum target_xfer_status
1590 target_write_partial (struct target_ops
*ops
,
1591 enum target_object object
,
1592 const char *annex
, const gdb_byte
*buf
,
1593 ULONGEST offset
, LONGEST len
, ULONGEST
*xfered_len
)
1595 return target_xfer_partial (ops
, object
, annex
, NULL
, buf
, offset
, len
,
1599 /* Wrappers to perform the full transfer. */
1601 /* For docs on target_read see target.h. */
1604 target_read (struct target_ops
*ops
,
1605 enum target_object object
,
1606 const char *annex
, gdb_byte
*buf
,
1607 ULONGEST offset
, LONGEST len
)
1609 LONGEST xfered_total
= 0;
1612 /* If we are reading from a memory object, find the length of an addressable
1613 unit for that architecture. */
1614 if (object
== TARGET_OBJECT_MEMORY
1615 || object
== TARGET_OBJECT_STACK_MEMORY
1616 || object
== TARGET_OBJECT_CODE_MEMORY
1617 || object
== TARGET_OBJECT_RAW_MEMORY
)
1618 unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
1620 while (xfered_total
< len
)
1622 ULONGEST xfered_partial
;
1623 enum target_xfer_status status
;
1625 status
= target_read_partial (ops
, object
, annex
,
1626 buf
+ xfered_total
* unit_size
,
1627 offset
+ xfered_total
, len
- xfered_total
,
1630 /* Call an observer, notifying them of the xfer progress? */
1631 if (status
== TARGET_XFER_EOF
)
1632 return xfered_total
;
1633 else if (status
== TARGET_XFER_OK
)
1635 xfered_total
+= xfered_partial
;
1639 return TARGET_XFER_E_IO
;
1645 /* Assuming that the entire [begin, end) range of memory cannot be
1646 read, try to read whatever subrange is possible to read.
1648 The function returns, in RESULT, either zero or one memory block.
1649 If there's a readable subrange at the beginning, it is completely
1650 read and returned. Any further readable subrange will not be read.
1651 Otherwise, if there's a readable subrange at the end, it will be
1652 completely read and returned. Any readable subranges before it
1653 (obviously, not starting at the beginning), will be ignored. In
1654 other cases -- either no readable subrange, or readable subrange(s)
1655 that is neither at the beginning, or end, nothing is returned.
1657 The purpose of this function is to handle a read across a boundary
1658 of accessible memory in a case when memory map is not available.
1659 The above restrictions are fine for this case, but will give
1660 incorrect results if the memory is 'patchy'. However, supporting
1661 'patchy' memory would require trying to read every single byte,
1662 and it seems unacceptable solution. Explicit memory map is
1663 recommended for this case -- and target_read_memory_robust will
1664 take care of reading multiple ranges then. */
1667 read_whatever_is_readable (struct target_ops
*ops
,
1668 const ULONGEST begin
, const ULONGEST end
,
1670 VEC(memory_read_result_s
) **result
)
1672 gdb_byte
*buf
= (gdb_byte
*) xmalloc (end
- begin
);
1673 ULONGEST current_begin
= begin
;
1674 ULONGEST current_end
= end
;
1676 memory_read_result_s r
;
1677 ULONGEST xfered_len
;
1679 /* If we previously failed to read 1 byte, nothing can be done here. */
1680 if (end
- begin
<= 1)
1686 /* Check that either first or the last byte is readable, and give up
1687 if not. This heuristic is meant to permit reading accessible memory
1688 at the boundary of accessible region. */
1689 if (target_read_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1690 buf
, begin
, 1, &xfered_len
) == TARGET_XFER_OK
)
1695 else if (target_read_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1696 buf
+ (end
- begin
) - 1, end
- 1, 1,
1697 &xfered_len
) == TARGET_XFER_OK
)
1708 /* Loop invariant is that the [current_begin, current_end) was previously
1709 found to be not readable as a whole.
1711 Note loop condition -- if the range has 1 byte, we can't divide the range
1712 so there's no point trying further. */
1713 while (current_end
- current_begin
> 1)
1715 ULONGEST first_half_begin
, first_half_end
;
1716 ULONGEST second_half_begin
, second_half_end
;
1718 ULONGEST middle
= current_begin
+ (current_end
- current_begin
) / 2;
1722 first_half_begin
= current_begin
;
1723 first_half_end
= middle
;
1724 second_half_begin
= middle
;
1725 second_half_end
= current_end
;
1729 first_half_begin
= middle
;
1730 first_half_end
= current_end
;
1731 second_half_begin
= current_begin
;
1732 second_half_end
= middle
;
1735 xfer
= target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1736 buf
+ (first_half_begin
- begin
) * unit_size
,
1738 first_half_end
- first_half_begin
);
1740 if (xfer
== first_half_end
- first_half_begin
)
1742 /* This half reads up fine. So, the error must be in the
1744 current_begin
= second_half_begin
;
1745 current_end
= second_half_end
;
1749 /* This half is not readable. Because we've tried one byte, we
1750 know some part of this half if actually readable. Go to the next
1751 iteration to divide again and try to read.
1753 We don't handle the other half, because this function only tries
1754 to read a single readable subrange. */
1755 current_begin
= first_half_begin
;
1756 current_end
= first_half_end
;
1762 /* The [begin, current_begin) range has been read. */
1764 r
.end
= current_begin
;
1769 /* The [current_end, end) range has been read. */
1770 LONGEST region_len
= end
- current_end
;
1772 r
.data
= (gdb_byte
*) xmalloc (region_len
* unit_size
);
1773 memcpy (r
.data
, buf
+ (current_end
- begin
) * unit_size
,
1774 region_len
* unit_size
);
1775 r
.begin
= current_end
;
1779 VEC_safe_push(memory_read_result_s
, (*result
), &r
);
1783 free_memory_read_result_vector (void *x
)
1785 VEC(memory_read_result_s
) *v
= (VEC(memory_read_result_s
) *) x
;
1786 memory_read_result_s
*current
;
1789 for (ix
= 0; VEC_iterate (memory_read_result_s
, v
, ix
, current
); ++ix
)
1791 xfree (current
->data
);
1793 VEC_free (memory_read_result_s
, v
);
1796 VEC(memory_read_result_s
) *
1797 read_memory_robust (struct target_ops
*ops
,
1798 const ULONGEST offset
, const LONGEST len
)
1800 VEC(memory_read_result_s
) *result
= 0;
1801 int unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
1803 LONGEST xfered_total
= 0;
1804 while (xfered_total
< len
)
1806 struct mem_region
*region
= lookup_mem_region (offset
+ xfered_total
);
1809 /* If there is no explicit region, a fake one should be created. */
1810 gdb_assert (region
);
1812 if (region
->hi
== 0)
1813 region_len
= len
- xfered_total
;
1815 region_len
= region
->hi
- offset
;
1817 if (region
->attrib
.mode
== MEM_NONE
|| region
->attrib
.mode
== MEM_WO
)
1819 /* Cannot read this region. Note that we can end up here only
1820 if the region is explicitly marked inaccessible, or
1821 'inaccessible-by-default' is in effect. */
1822 xfered_total
+= region_len
;
1826 LONGEST to_read
= min (len
- xfered_total
, region_len
);
1827 gdb_byte
*buffer
= (gdb_byte
*) xmalloc (to_read
* unit_size
);
1829 LONGEST xfered_partial
=
1830 target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1831 (gdb_byte
*) buffer
,
1832 offset
+ xfered_total
, to_read
);
1833 /* Call an observer, notifying them of the xfer progress? */
1834 if (xfered_partial
<= 0)
1836 /* Got an error reading full chunk. See if maybe we can read
1839 read_whatever_is_readable (ops
, offset
+ xfered_total
,
1840 offset
+ xfered_total
+ to_read
,
1841 unit_size
, &result
);
1842 xfered_total
+= to_read
;
1846 struct memory_read_result r
;
1848 r
.begin
= offset
+ xfered_total
;
1849 r
.end
= r
.begin
+ xfered_partial
;
1850 VEC_safe_push (memory_read_result_s
, result
, &r
);
1851 xfered_total
+= xfered_partial
;
1860 /* An alternative to target_write with progress callbacks. */
1863 target_write_with_progress (struct target_ops
*ops
,
1864 enum target_object object
,
1865 const char *annex
, const gdb_byte
*buf
,
1866 ULONGEST offset
, LONGEST len
,
1867 void (*progress
) (ULONGEST
, void *), void *baton
)
1869 LONGEST xfered_total
= 0;
1872 /* If we are writing to a memory object, find the length of an addressable
1873 unit for that architecture. */
1874 if (object
== TARGET_OBJECT_MEMORY
1875 || object
== TARGET_OBJECT_STACK_MEMORY
1876 || object
== TARGET_OBJECT_CODE_MEMORY
1877 || object
== TARGET_OBJECT_RAW_MEMORY
)
1878 unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
1880 /* Give the progress callback a chance to set up. */
1882 (*progress
) (0, baton
);
1884 while (xfered_total
< len
)
1886 ULONGEST xfered_partial
;
1887 enum target_xfer_status status
;
1889 status
= target_write_partial (ops
, object
, annex
,
1890 buf
+ xfered_total
* unit_size
,
1891 offset
+ xfered_total
, len
- xfered_total
,
1894 if (status
!= TARGET_XFER_OK
)
1895 return status
== TARGET_XFER_EOF
? xfered_total
: TARGET_XFER_E_IO
;
1898 (*progress
) (xfered_partial
, baton
);
1900 xfered_total
+= xfered_partial
;
1906 /* For docs on target_write see target.h. */
1909 target_write (struct target_ops
*ops
,
1910 enum target_object object
,
1911 const char *annex
, const gdb_byte
*buf
,
1912 ULONGEST offset
, LONGEST len
)
1914 return target_write_with_progress (ops
, object
, annex
, buf
, offset
, len
,
1918 /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return
1919 the size of the transferred data. PADDING additional bytes are
1920 available in *BUF_P. This is a helper function for
1921 target_read_alloc; see the declaration of that function for more
1925 target_read_alloc_1 (struct target_ops
*ops
, enum target_object object
,
1926 const char *annex
, gdb_byte
**buf_p
, int padding
)
1928 size_t buf_alloc
, buf_pos
;
1931 /* This function does not have a length parameter; it reads the
1932 entire OBJECT). Also, it doesn't support objects fetched partly
1933 from one target and partly from another (in a different stratum,
1934 e.g. a core file and an executable). Both reasons make it
1935 unsuitable for reading memory. */
1936 gdb_assert (object
!= TARGET_OBJECT_MEMORY
);
1938 /* Start by reading up to 4K at a time. The target will throttle
1939 this number down if necessary. */
1941 buf
= (gdb_byte
*) xmalloc (buf_alloc
);
1945 ULONGEST xfered_len
;
1946 enum target_xfer_status status
;
1948 status
= target_read_partial (ops
, object
, annex
, &buf
[buf_pos
],
1949 buf_pos
, buf_alloc
- buf_pos
- padding
,
1952 if (status
== TARGET_XFER_EOF
)
1954 /* Read all there was. */
1961 else if (status
!= TARGET_XFER_OK
)
1963 /* An error occurred. */
1965 return TARGET_XFER_E_IO
;
1968 buf_pos
+= xfered_len
;
1970 /* If the buffer is filling up, expand it. */
1971 if (buf_alloc
< buf_pos
* 2)
1974 buf
= (gdb_byte
*) xrealloc (buf
, buf_alloc
);
1981 /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return
1982 the size of the transferred data. See the declaration in "target.h"
1983 function for more information about the return value. */
1986 target_read_alloc (struct target_ops
*ops
, enum target_object object
,
1987 const char *annex
, gdb_byte
**buf_p
)
1989 return target_read_alloc_1 (ops
, object
, annex
, buf_p
, 0);
1992 /* Read OBJECT/ANNEX using OPS. The result is NUL-terminated and
1993 returned as a string, allocated using xmalloc. If an error occurs
1994 or the transfer is unsupported, NULL is returned. Empty objects
1995 are returned as allocated but empty strings. A warning is issued
1996 if the result contains any embedded NUL bytes. */
1999 target_read_stralloc (struct target_ops
*ops
, enum target_object object
,
2004 LONGEST i
, transferred
;
2006 transferred
= target_read_alloc_1 (ops
, object
, annex
, &buffer
, 1);
2007 bufstr
= (char *) buffer
;
2009 if (transferred
< 0)
2012 if (transferred
== 0)
2013 return xstrdup ("");
2015 bufstr
[transferred
] = 0;
2017 /* Check for embedded NUL bytes; but allow trailing NULs. */
2018 for (i
= strlen (bufstr
); i
< transferred
; i
++)
2021 warning (_("target object %d, annex %s, "
2022 "contained unexpected null characters"),
2023 (int) object
, annex
? annex
: "(none)");
2030 /* Memory transfer methods. */
2033 get_target_memory (struct target_ops
*ops
, CORE_ADDR addr
, gdb_byte
*buf
,
2036 /* This method is used to read from an alternate, non-current
2037 target. This read must bypass the overlay support (as symbols
2038 don't match this target), and GDB's internal cache (wrong cache
2039 for this target). */
2040 if (target_read (ops
, TARGET_OBJECT_RAW_MEMORY
, NULL
, buf
, addr
, len
)
2042 memory_error (TARGET_XFER_E_IO
, addr
);
2046 get_target_memory_unsigned (struct target_ops
*ops
, CORE_ADDR addr
,
2047 int len
, enum bfd_endian byte_order
)
2049 gdb_byte buf
[sizeof (ULONGEST
)];
2051 gdb_assert (len
<= sizeof (buf
));
2052 get_target_memory (ops
, addr
, buf
, len
);
2053 return extract_unsigned_integer (buf
, len
, byte_order
);
2059 target_insert_breakpoint (struct gdbarch
*gdbarch
,
2060 struct bp_target_info
*bp_tgt
)
2062 if (!may_insert_breakpoints
)
2064 warning (_("May not insert breakpoints"));
2068 return current_target
.to_insert_breakpoint (¤t_target
,
2075 target_remove_breakpoint (struct gdbarch
*gdbarch
,
2076 struct bp_target_info
*bp_tgt
)
2078 /* This is kind of a weird case to handle, but the permission might
2079 have been changed after breakpoints were inserted - in which case
2080 we should just take the user literally and assume that any
2081 breakpoints should be left in place. */
2082 if (!may_insert_breakpoints
)
2084 warning (_("May not remove breakpoints"));
2088 return current_target
.to_remove_breakpoint (¤t_target
,
2093 target_info (char *args
, int from_tty
)
2095 struct target_ops
*t
;
2096 int has_all_mem
= 0;
2098 if (symfile_objfile
!= NULL
)
2099 printf_unfiltered (_("Symbols from \"%s\".\n"),
2100 objfile_name (symfile_objfile
));
2102 for (t
= target_stack
; t
!= NULL
; t
= t
->beneath
)
2104 if (!(*t
->to_has_memory
) (t
))
2107 if ((int) (t
->to_stratum
) <= (int) dummy_stratum
)
2110 printf_unfiltered (_("\tWhile running this, "
2111 "GDB does not access memory from...\n"));
2112 printf_unfiltered ("%s:\n", t
->to_longname
);
2113 (t
->to_files_info
) (t
);
2114 has_all_mem
= (*t
->to_has_all_memory
) (t
);
2118 /* This function is called before any new inferior is created, e.g.
2119 by running a program, attaching, or connecting to a target.
2120 It cleans up any state from previous invocations which might
2121 change between runs. This is a subset of what target_preopen
2122 resets (things which might change between targets). */
2125 target_pre_inferior (int from_tty
)
2127 /* Clear out solib state. Otherwise the solib state of the previous
2128 inferior might have survived and is entirely wrong for the new
2129 target. This has been observed on GNU/Linux using glibc 2.3. How
2141 Cannot access memory at address 0xdeadbeef
2144 /* In some OSs, the shared library list is the same/global/shared
2145 across inferiors. If code is shared between processes, so are
2146 memory regions and features. */
2147 if (!gdbarch_has_global_solist (target_gdbarch ()))
2149 no_shared_libraries (NULL
, from_tty
);
2151 invalidate_target_mem_regions ();
2153 target_clear_description ();
2156 /* attach_flag may be set if the previous process associated with
2157 the inferior was attached to. */
2158 current_inferior ()->attach_flag
= 0;
2160 agent_capability_invalidate ();
2163 /* Callback for iterate_over_inferiors. Gets rid of the given
2167 dispose_inferior (struct inferior
*inf
, void *args
)
2169 struct thread_info
*thread
;
2171 thread
= any_thread_of_process (inf
->pid
);
2174 switch_to_thread (thread
->ptid
);
2176 /* Core inferiors actually should be detached, not killed. */
2177 if (target_has_execution
)
2180 target_detach (NULL
, 0);
2186 /* This is to be called by the open routine before it does
2190 target_preopen (int from_tty
)
2194 if (have_inferiors ())
2197 || !have_live_inferiors ()
2198 || query (_("A program is being debugged already. Kill it? ")))
2199 iterate_over_inferiors (dispose_inferior
, NULL
);
2201 error (_("Program not killed."));
2204 /* Calling target_kill may remove the target from the stack. But if
2205 it doesn't (which seems like a win for UDI), remove it now. */
2206 /* Leave the exec target, though. The user may be switching from a
2207 live process to a core of the same program. */
2208 pop_all_targets_above (file_stratum
);
2210 target_pre_inferior (from_tty
);
2213 /* Detach a target after doing deferred register stores. */
2216 target_detach (const char *args
, int from_tty
)
2218 struct target_ops
* t
;
2220 if (gdbarch_has_global_breakpoints (target_gdbarch ()))
2221 /* Don't remove global breakpoints here. They're removed on
2222 disconnection from the target. */
2225 /* If we're in breakpoints-always-inserted mode, have to remove
2226 them before detaching. */
2227 remove_breakpoints_pid (ptid_get_pid (inferior_ptid
));
2229 prepare_for_detach ();
2231 current_target
.to_detach (¤t_target
, args
, from_tty
);
2235 target_disconnect (const char *args
, int from_tty
)
2237 /* If we're in breakpoints-always-inserted mode or if breakpoints
2238 are global across processes, we have to remove them before
2240 remove_breakpoints ();
2242 current_target
.to_disconnect (¤t_target
, args
, from_tty
);
2246 target_wait (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
2248 return (current_target
.to_wait
) (¤t_target
, ptid
, status
, options
);
2254 default_target_wait (struct target_ops
*ops
,
2255 ptid_t ptid
, struct target_waitstatus
*status
,
2258 status
->kind
= TARGET_WAITKIND_IGNORE
;
2259 return minus_one_ptid
;
2263 target_pid_to_str (ptid_t ptid
)
2265 return (*current_target
.to_pid_to_str
) (¤t_target
, ptid
);
2269 target_thread_name (struct thread_info
*info
)
2271 return current_target
.to_thread_name (¤t_target
, info
);
2275 target_resume (ptid_t ptid
, int step
, enum gdb_signal signal
)
2277 struct target_ops
*t
;
2279 target_dcache_invalidate ();
2281 current_target
.to_resume (¤t_target
, ptid
, step
, signal
);
2283 registers_changed_ptid (ptid
);
2284 /* We only set the internal executing state here. The user/frontend
2285 running state is set at a higher level. */
2286 set_executing (ptid
, 1);
2287 clear_inline_frame_state (ptid
);
2291 target_pass_signals (int numsigs
, unsigned char *pass_signals
)
2293 (*current_target
.to_pass_signals
) (¤t_target
, numsigs
, pass_signals
);
2297 target_program_signals (int numsigs
, unsigned char *program_signals
)
2299 (*current_target
.to_program_signals
) (¤t_target
,
2300 numsigs
, program_signals
);
2304 default_follow_fork (struct target_ops
*self
, int follow_child
,
2307 /* Some target returned a fork event, but did not know how to follow it. */
2308 internal_error (__FILE__
, __LINE__
,
2309 _("could not find a target to follow fork"));
2312 /* Look through the list of possible targets for a target that can
2316 target_follow_fork (int follow_child
, int detach_fork
)
2318 return current_target
.to_follow_fork (¤t_target
,
2319 follow_child
, detach_fork
);
2322 /* Target wrapper for follow exec hook. */
2325 target_follow_exec (struct inferior
*inf
, char *execd_pathname
)
2327 current_target
.to_follow_exec (¤t_target
, inf
, execd_pathname
);
2331 default_mourn_inferior (struct target_ops
*self
)
2333 internal_error (__FILE__
, __LINE__
,
2334 _("could not find a target to follow mourn inferior"));
2338 target_mourn_inferior (void)
2340 current_target
.to_mourn_inferior (¤t_target
);
2342 /* We no longer need to keep handles on any of the object files.
2343 Make sure to release them to avoid unnecessarily locking any
2344 of them while we're not actually debugging. */
2345 bfd_cache_close_all ();
2348 /* Look for a target which can describe architectural features, starting
2349 from TARGET. If we find one, return its description. */
2351 const struct target_desc
*
2352 target_read_description (struct target_ops
*target
)
2354 return target
->to_read_description (target
);
2357 /* This implements a basic search of memory, reading target memory and
2358 performing the search here (as opposed to performing the search in on the
2359 target side with, for example, gdbserver). */
2362 simple_search_memory (struct target_ops
*ops
,
2363 CORE_ADDR start_addr
, ULONGEST search_space_len
,
2364 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2365 CORE_ADDR
*found_addrp
)
2367 /* NOTE: also defined in find.c testcase. */
2368 #define SEARCH_CHUNK_SIZE 16000
2369 const unsigned chunk_size
= SEARCH_CHUNK_SIZE
;
2370 /* Buffer to hold memory contents for searching. */
2371 gdb_byte
*search_buf
;
2372 unsigned search_buf_size
;
2373 struct cleanup
*old_cleanups
;
2375 search_buf_size
= chunk_size
+ pattern_len
- 1;
2377 /* No point in trying to allocate a buffer larger than the search space. */
2378 if (search_space_len
< search_buf_size
)
2379 search_buf_size
= search_space_len
;
2381 search_buf
= (gdb_byte
*) malloc (search_buf_size
);
2382 if (search_buf
== NULL
)
2383 error (_("Unable to allocate memory to perform the search."));
2384 old_cleanups
= make_cleanup (free_current_contents
, &search_buf
);
2386 /* Prime the search buffer. */
2388 if (target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2389 search_buf
, start_addr
, search_buf_size
) != search_buf_size
)
2391 warning (_("Unable to access %s bytes of target "
2392 "memory at %s, halting search."),
2393 pulongest (search_buf_size
), hex_string (start_addr
));
2394 do_cleanups (old_cleanups
);
2398 /* Perform the search.
2400 The loop is kept simple by allocating [N + pattern-length - 1] bytes.
2401 When we've scanned N bytes we copy the trailing bytes to the start and
2402 read in another N bytes. */
2404 while (search_space_len
>= pattern_len
)
2406 gdb_byte
*found_ptr
;
2407 unsigned nr_search_bytes
= min (search_space_len
, search_buf_size
);
2409 found_ptr
= (gdb_byte
*) memmem (search_buf
, nr_search_bytes
,
2410 pattern
, pattern_len
);
2412 if (found_ptr
!= NULL
)
2414 CORE_ADDR found_addr
= start_addr
+ (found_ptr
- search_buf
);
2416 *found_addrp
= found_addr
;
2417 do_cleanups (old_cleanups
);
2421 /* Not found in this chunk, skip to next chunk. */
2423 /* Don't let search_space_len wrap here, it's unsigned. */
2424 if (search_space_len
>= chunk_size
)
2425 search_space_len
-= chunk_size
;
2427 search_space_len
= 0;
2429 if (search_space_len
>= pattern_len
)
2431 unsigned keep_len
= search_buf_size
- chunk_size
;
2432 CORE_ADDR read_addr
= start_addr
+ chunk_size
+ keep_len
;
2435 /* Copy the trailing part of the previous iteration to the front
2436 of the buffer for the next iteration. */
2437 gdb_assert (keep_len
== pattern_len
- 1);
2438 memcpy (search_buf
, search_buf
+ chunk_size
, keep_len
);
2440 nr_to_read
= min (search_space_len
- keep_len
, chunk_size
);
2442 if (target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2443 search_buf
+ keep_len
, read_addr
,
2444 nr_to_read
) != nr_to_read
)
2446 warning (_("Unable to access %s bytes of target "
2447 "memory at %s, halting search."),
2448 plongest (nr_to_read
),
2449 hex_string (read_addr
));
2450 do_cleanups (old_cleanups
);
2454 start_addr
+= chunk_size
;
2460 do_cleanups (old_cleanups
);
2464 /* Default implementation of memory-searching. */
2467 default_search_memory (struct target_ops
*self
,
2468 CORE_ADDR start_addr
, ULONGEST search_space_len
,
2469 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2470 CORE_ADDR
*found_addrp
)
2472 /* Start over from the top of the target stack. */
2473 return simple_search_memory (current_target
.beneath
,
2474 start_addr
, search_space_len
,
2475 pattern
, pattern_len
, found_addrp
);
2478 /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the
2479 sequence of bytes in PATTERN with length PATTERN_LEN.
2481 The result is 1 if found, 0 if not found, and -1 if there was an error
2482 requiring halting of the search (e.g. memory read error).
2483 If the pattern is found the address is recorded in FOUND_ADDRP. */
2486 target_search_memory (CORE_ADDR start_addr
, ULONGEST search_space_len
,
2487 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2488 CORE_ADDR
*found_addrp
)
2490 return current_target
.to_search_memory (¤t_target
, start_addr
,
2492 pattern
, pattern_len
, found_addrp
);
2495 /* Look through the currently pushed targets. If none of them will
2496 be able to restart the currently running process, issue an error
2500 target_require_runnable (void)
2502 struct target_ops
*t
;
2504 for (t
= target_stack
; t
!= NULL
; t
= t
->beneath
)
2506 /* If this target knows how to create a new program, then
2507 assume we will still be able to after killing the current
2508 one. Either killing and mourning will not pop T, or else
2509 find_default_run_target will find it again. */
2510 if (t
->to_create_inferior
!= NULL
)
2513 /* Do not worry about targets at certain strata that can not
2514 create inferiors. Assume they will be pushed again if
2515 necessary, and continue to the process_stratum. */
2516 if (t
->to_stratum
== thread_stratum
2517 || t
->to_stratum
== record_stratum
2518 || t
->to_stratum
== arch_stratum
)
2521 error (_("The \"%s\" target does not support \"run\". "
2522 "Try \"help target\" or \"continue\"."),
2526 /* This function is only called if the target is running. In that
2527 case there should have been a process_stratum target and it
2528 should either know how to create inferiors, or not... */
2529 internal_error (__FILE__
, __LINE__
, _("No targets found"));
2532 /* Whether GDB is allowed to fall back to the default run target for
2533 "run", "attach", etc. when no target is connected yet. */
2534 static int auto_connect_native_target
= 1;
2537 show_auto_connect_native_target (struct ui_file
*file
, int from_tty
,
2538 struct cmd_list_element
*c
, const char *value
)
2540 fprintf_filtered (file
,
2541 _("Whether GDB may automatically connect to the "
2542 "native target is %s.\n"),
2546 /* Look through the list of possible targets for a target that can
2547 execute a run or attach command without any other data. This is
2548 used to locate the default process stratum.
2550 If DO_MESG is not NULL, the result is always valid (error() is
2551 called for errors); else, return NULL on error. */
2553 static struct target_ops
*
2554 find_default_run_target (char *do_mesg
)
2556 struct target_ops
*runable
= NULL
;
2558 if (auto_connect_native_target
)
2560 struct target_ops
*t
;
2564 for (i
= 0; VEC_iterate (target_ops_p
, target_structs
, i
, t
); ++i
)
2566 if (t
->to_can_run
!= delegate_can_run
&& target_can_run (t
))
2577 if (runable
== NULL
)
2580 error (_("Don't know how to %s. Try \"help target\"."), do_mesg
);
2591 find_attach_target (void)
2593 struct target_ops
*t
;
2595 /* If a target on the current stack can attach, use it. */
2596 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2598 if (t
->to_attach
!= NULL
)
2602 /* Otherwise, use the default run target for attaching. */
2604 t
= find_default_run_target ("attach");
2612 find_run_target (void)
2614 struct target_ops
*t
;
2616 /* If a target on the current stack can attach, use it. */
2617 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2619 if (t
->to_create_inferior
!= NULL
)
2623 /* Otherwise, use the default run target. */
2625 t
= find_default_run_target ("run");
2630 /* Implement the "info proc" command. */
2633 target_info_proc (const char *args
, enum info_proc_what what
)
2635 struct target_ops
*t
;
2637 /* If we're already connected to something that can get us OS
2638 related data, use it. Otherwise, try using the native
2640 if (current_target
.to_stratum
>= process_stratum
)
2641 t
= current_target
.beneath
;
2643 t
= find_default_run_target (NULL
);
2645 for (; t
!= NULL
; t
= t
->beneath
)
2647 if (t
->to_info_proc
!= NULL
)
2649 t
->to_info_proc (t
, args
, what
);
2652 fprintf_unfiltered (gdb_stdlog
,
2653 "target_info_proc (\"%s\", %d)\n", args
, what
);
2663 find_default_supports_disable_randomization (struct target_ops
*self
)
2665 struct target_ops
*t
;
2667 t
= find_default_run_target (NULL
);
2668 if (t
&& t
->to_supports_disable_randomization
)
2669 return (t
->to_supports_disable_randomization
) (t
);
2674 target_supports_disable_randomization (void)
2676 struct target_ops
*t
;
2678 for (t
= ¤t_target
; t
!= NULL
; t
= t
->beneath
)
2679 if (t
->to_supports_disable_randomization
)
2680 return t
->to_supports_disable_randomization (t
);
2686 target_get_osdata (const char *type
)
2688 struct target_ops
*t
;
2690 /* If we're already connected to something that can get us OS
2691 related data, use it. Otherwise, try using the native
2693 if (current_target
.to_stratum
>= process_stratum
)
2694 t
= current_target
.beneath
;
2696 t
= find_default_run_target ("get OS data");
2701 return target_read_stralloc (t
, TARGET_OBJECT_OSDATA
, type
);
2704 static struct address_space
*
2705 default_thread_address_space (struct target_ops
*self
, ptid_t ptid
)
2707 struct inferior
*inf
;
2709 /* Fall-back to the "main" address space of the inferior. */
2710 inf
= find_inferior_ptid (ptid
);
2712 if (inf
== NULL
|| inf
->aspace
== NULL
)
2713 internal_error (__FILE__
, __LINE__
,
2714 _("Can't determine the current "
2715 "address space of thread %s\n"),
2716 target_pid_to_str (ptid
));
2721 /* Determine the current address space of thread PTID. */
2723 struct address_space
*
2724 target_thread_address_space (ptid_t ptid
)
2726 struct address_space
*aspace
;
2728 aspace
= current_target
.to_thread_address_space (¤t_target
, ptid
);
2729 gdb_assert (aspace
!= NULL
);
2735 /* Target file operations. */
2737 static struct target_ops
*
2738 default_fileio_target (void)
2740 /* If we're already connected to something that can perform
2741 file I/O, use it. Otherwise, try using the native target. */
2742 if (current_target
.to_stratum
>= process_stratum
)
2743 return current_target
.beneath
;
2745 return find_default_run_target ("file I/O");
2748 /* File handle for target file operations. */
2752 /* The target on which this file is open. */
2753 struct target_ops
*t
;
2755 /* The file descriptor on the target. */
2759 DEF_VEC_O (fileio_fh_t
);
2761 /* Vector of currently open file handles. The value returned by
2762 target_fileio_open and passed as the FD argument to other
2763 target_fileio_* functions is an index into this vector. This
2764 vector's entries are never freed; instead, files are marked as
2765 closed, and the handle becomes available for reuse. */
2766 static VEC (fileio_fh_t
) *fileio_fhandles
;
2768 /* Macro to check whether a fileio_fh_t represents a closed file. */
2769 #define is_closed_fileio_fh(fd) ((fd) < 0)
2771 /* Index into fileio_fhandles of the lowest handle that might be
2772 closed. This permits handle reuse without searching the whole
2773 list each time a new file is opened. */
2774 static int lowest_closed_fd
;
2776 /* Acquire a target fileio file descriptor. */
2779 acquire_fileio_fd (struct target_ops
*t
, int fd
)
2781 fileio_fh_t
*fh
, buf
;
2783 gdb_assert (!is_closed_fileio_fh (fd
));
2785 /* Search for closed handles to reuse. */
2787 VEC_iterate (fileio_fh_t
, fileio_fhandles
,
2788 lowest_closed_fd
, fh
);
2790 if (is_closed_fileio_fh (fh
->fd
))
2793 /* Push a new handle if no closed handles were found. */
2794 if (lowest_closed_fd
== VEC_length (fileio_fh_t
, fileio_fhandles
))
2795 fh
= VEC_safe_push (fileio_fh_t
, fileio_fhandles
, NULL
);
2797 /* Fill in the handle. */
2801 /* Return its index, and start the next lookup at
2803 return lowest_closed_fd
++;
2806 /* Release a target fileio file descriptor. */
2809 release_fileio_fd (int fd
, fileio_fh_t
*fh
)
2812 lowest_closed_fd
= min (lowest_closed_fd
, fd
);
2815 /* Return a pointer to the fileio_fhandle_t corresponding to FD. */
2817 #define fileio_fd_to_fh(fd) \
2818 VEC_index (fileio_fh_t, fileio_fhandles, (fd))
2820 /* Helper for target_fileio_open and
2821 target_fileio_open_warn_if_slow. */
2824 target_fileio_open_1 (struct inferior
*inf
, const char *filename
,
2825 int flags
, int mode
, int warn_if_slow
,
2828 struct target_ops
*t
;
2830 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
2832 if (t
->to_fileio_open
!= NULL
)
2834 int fd
= t
->to_fileio_open (t
, inf
, filename
, flags
, mode
,
2835 warn_if_slow
, target_errno
);
2840 fd
= acquire_fileio_fd (t
, fd
);
2843 fprintf_unfiltered (gdb_stdlog
,
2844 "target_fileio_open (%d,%s,0x%x,0%o,%d)"
2846 inf
== NULL
? 0 : inf
->num
,
2847 filename
, flags
, mode
,
2849 fd
!= -1 ? 0 : *target_errno
);
2854 *target_errno
= FILEIO_ENOSYS
;
2861 target_fileio_open (struct inferior
*inf
, const char *filename
,
2862 int flags
, int mode
, int *target_errno
)
2864 return target_fileio_open_1 (inf
, filename
, flags
, mode
, 0,
2871 target_fileio_open_warn_if_slow (struct inferior
*inf
,
2872 const char *filename
,
2873 int flags
, int mode
, int *target_errno
)
2875 return target_fileio_open_1 (inf
, filename
, flags
, mode
, 1,
2882 target_fileio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
2883 ULONGEST offset
, int *target_errno
)
2885 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
2888 if (is_closed_fileio_fh (fh
->fd
))
2889 *target_errno
= EBADF
;
2891 ret
= fh
->t
->to_fileio_pwrite (fh
->t
, fh
->fd
, write_buf
,
2892 len
, offset
, target_errno
);
2895 fprintf_unfiltered (gdb_stdlog
,
2896 "target_fileio_pwrite (%d,...,%d,%s) "
2898 fd
, len
, pulongest (offset
),
2899 ret
, ret
!= -1 ? 0 : *target_errno
);
2906 target_fileio_pread (int fd
, gdb_byte
*read_buf
, int len
,
2907 ULONGEST offset
, int *target_errno
)
2909 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
2912 if (is_closed_fileio_fh (fh
->fd
))
2913 *target_errno
= EBADF
;
2915 ret
= fh
->t
->to_fileio_pread (fh
->t
, fh
->fd
, read_buf
,
2916 len
, offset
, target_errno
);
2919 fprintf_unfiltered (gdb_stdlog
,
2920 "target_fileio_pread (%d,...,%d,%s) "
2922 fd
, len
, pulongest (offset
),
2923 ret
, ret
!= -1 ? 0 : *target_errno
);
2930 target_fileio_fstat (int fd
, struct stat
*sb
, int *target_errno
)
2932 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
2935 if (is_closed_fileio_fh (fh
->fd
))
2936 *target_errno
= EBADF
;
2938 ret
= fh
->t
->to_fileio_fstat (fh
->t
, fh
->fd
, sb
, target_errno
);
2941 fprintf_unfiltered (gdb_stdlog
,
2942 "target_fileio_fstat (%d) = %d (%d)\n",
2943 fd
, ret
, ret
!= -1 ? 0 : *target_errno
);
2950 target_fileio_close (int fd
, int *target_errno
)
2952 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
2955 if (is_closed_fileio_fh (fh
->fd
))
2956 *target_errno
= EBADF
;
2959 ret
= fh
->t
->to_fileio_close (fh
->t
, fh
->fd
, target_errno
);
2960 release_fileio_fd (fd
, fh
);
2964 fprintf_unfiltered (gdb_stdlog
,
2965 "target_fileio_close (%d) = %d (%d)\n",
2966 fd
, ret
, ret
!= -1 ? 0 : *target_errno
);
2973 target_fileio_unlink (struct inferior
*inf
, const char *filename
,
2976 struct target_ops
*t
;
2978 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
2980 if (t
->to_fileio_unlink
!= NULL
)
2982 int ret
= t
->to_fileio_unlink (t
, inf
, filename
,
2986 fprintf_unfiltered (gdb_stdlog
,
2987 "target_fileio_unlink (%d,%s)"
2989 inf
== NULL
? 0 : inf
->num
, filename
,
2990 ret
, ret
!= -1 ? 0 : *target_errno
);
2995 *target_errno
= FILEIO_ENOSYS
;
3002 target_fileio_readlink (struct inferior
*inf
, const char *filename
,
3005 struct target_ops
*t
;
3007 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
3009 if (t
->to_fileio_readlink
!= NULL
)
3011 char *ret
= t
->to_fileio_readlink (t
, inf
, filename
,
3015 fprintf_unfiltered (gdb_stdlog
,
3016 "target_fileio_readlink (%d,%s)"
3018 inf
== NULL
? 0 : inf
->num
,
3019 filename
, ret
? ret
: "(nil)",
3020 ret
? 0 : *target_errno
);
3025 *target_errno
= FILEIO_ENOSYS
;
3030 target_fileio_close_cleanup (void *opaque
)
3032 int fd
= *(int *) opaque
;
3035 target_fileio_close (fd
, &target_errno
);
3038 /* Read target file FILENAME, in the filesystem as seen by INF. If
3039 INF is NULL, use the filesystem seen by the debugger (GDB or, for
3040 remote targets, the remote stub). Store the result in *BUF_P and
3041 return the size of the transferred data. PADDING additional bytes
3042 are available in *BUF_P. This is a helper function for
3043 target_fileio_read_alloc; see the declaration of that function for
3044 more information. */
3047 target_fileio_read_alloc_1 (struct inferior
*inf
, const char *filename
,
3048 gdb_byte
**buf_p
, int padding
)
3050 struct cleanup
*close_cleanup
;
3051 size_t buf_alloc
, buf_pos
;
3057 fd
= target_fileio_open (inf
, filename
, FILEIO_O_RDONLY
, 0700,
3062 close_cleanup
= make_cleanup (target_fileio_close_cleanup
, &fd
);
3064 /* Start by reading up to 4K at a time. The target will throttle
3065 this number down if necessary. */
3067 buf
= (gdb_byte
*) xmalloc (buf_alloc
);
3071 n
= target_fileio_pread (fd
, &buf
[buf_pos
],
3072 buf_alloc
- buf_pos
- padding
, buf_pos
,
3076 /* An error occurred. */
3077 do_cleanups (close_cleanup
);
3083 /* Read all there was. */
3084 do_cleanups (close_cleanup
);
3094 /* If the buffer is filling up, expand it. */
3095 if (buf_alloc
< buf_pos
* 2)
3098 buf
= (gdb_byte
*) xrealloc (buf
, buf_alloc
);
3108 target_fileio_read_alloc (struct inferior
*inf
, const char *filename
,
3111 return target_fileio_read_alloc_1 (inf
, filename
, buf_p
, 0);
3117 target_fileio_read_stralloc (struct inferior
*inf
, const char *filename
)
3121 LONGEST i
, transferred
;
3123 transferred
= target_fileio_read_alloc_1 (inf
, filename
, &buffer
, 1);
3124 bufstr
= (char *) buffer
;
3126 if (transferred
< 0)
3129 if (transferred
== 0)
3130 return xstrdup ("");
3132 bufstr
[transferred
] = 0;
3134 /* Check for embedded NUL bytes; but allow trailing NULs. */
3135 for (i
= strlen (bufstr
); i
< transferred
; i
++)
3138 warning (_("target file %s "
3139 "contained unexpected null characters"),
3149 default_region_ok_for_hw_watchpoint (struct target_ops
*self
,
3150 CORE_ADDR addr
, int len
)
3152 return (len
<= gdbarch_ptr_bit (target_gdbarch ()) / TARGET_CHAR_BIT
);
3156 default_watchpoint_addr_within_range (struct target_ops
*target
,
3158 CORE_ADDR start
, int length
)
3160 return addr
>= start
&& addr
< start
+ length
;
3163 static struct gdbarch
*
3164 default_thread_architecture (struct target_ops
*ops
, ptid_t ptid
)
3166 return target_gdbarch ();
3170 return_zero (struct target_ops
*ignore
)
3176 return_zero_has_execution (struct target_ops
*ignore
, ptid_t ignore2
)
3182 * Find the next target down the stack from the specified target.
3186 find_target_beneath (struct target_ops
*t
)
3194 find_target_at (enum strata stratum
)
3196 struct target_ops
*t
;
3198 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3199 if (t
->to_stratum
== stratum
)
3206 /* The inferior process has died. Long live the inferior! */
3209 generic_mourn_inferior (void)
3213 ptid
= inferior_ptid
;
3214 inferior_ptid
= null_ptid
;
3216 /* Mark breakpoints uninserted in case something tries to delete a
3217 breakpoint while we delete the inferior's threads (which would
3218 fail, since the inferior is long gone). */
3219 mark_breakpoints_out ();
3221 if (!ptid_equal (ptid
, null_ptid
))
3223 int pid
= ptid_get_pid (ptid
);
3224 exit_inferior (pid
);
3227 /* Note this wipes step-resume breakpoints, so needs to be done
3228 after exit_inferior, which ends up referencing the step-resume
3229 breakpoints through clear_thread_inferior_resources. */
3230 breakpoint_init_inferior (inf_exited
);
3232 registers_changed ();
3234 reopen_exec_file ();
3235 reinit_frame_cache ();
3237 if (deprecated_detach_hook
)
3238 deprecated_detach_hook ();
3241 /* Convert a normal process ID to a string. Returns the string in a
3245 normal_pid_to_str (ptid_t ptid
)
3247 static char buf
[32];
3249 xsnprintf (buf
, sizeof buf
, "process %d", ptid_get_pid (ptid
));
3254 default_pid_to_str (struct target_ops
*ops
, ptid_t ptid
)
3256 return normal_pid_to_str (ptid
);
3259 /* Error-catcher for target_find_memory_regions. */
3261 dummy_find_memory_regions (struct target_ops
*self
,
3262 find_memory_region_ftype ignore1
, void *ignore2
)
3264 error (_("Command not implemented for this target."));
3268 /* Error-catcher for target_make_corefile_notes. */
3270 dummy_make_corefile_notes (struct target_ops
*self
,
3271 bfd
*ignore1
, int *ignore2
)
3273 error (_("Command not implemented for this target."));
3277 /* Set up the handful of non-empty slots needed by the dummy target
3281 init_dummy_target (void)
3283 dummy_target
.to_shortname
= "None";
3284 dummy_target
.to_longname
= "None";
3285 dummy_target
.to_doc
= "";
3286 dummy_target
.to_supports_disable_randomization
3287 = find_default_supports_disable_randomization
;
3288 dummy_target
.to_stratum
= dummy_stratum
;
3289 dummy_target
.to_has_all_memory
= return_zero
;
3290 dummy_target
.to_has_memory
= return_zero
;
3291 dummy_target
.to_has_stack
= return_zero
;
3292 dummy_target
.to_has_registers
= return_zero
;
3293 dummy_target
.to_has_execution
= return_zero_has_execution
;
3294 dummy_target
.to_magic
= OPS_MAGIC
;
3296 install_dummy_methods (&dummy_target
);
3301 target_close (struct target_ops
*targ
)
3303 gdb_assert (!target_is_pushed (targ
));
3305 if (targ
->to_xclose
!= NULL
)
3306 targ
->to_xclose (targ
);
3307 else if (targ
->to_close
!= NULL
)
3308 targ
->to_close (targ
);
3311 fprintf_unfiltered (gdb_stdlog
, "target_close ()\n");
3315 target_thread_alive (ptid_t ptid
)
3317 return current_target
.to_thread_alive (¤t_target
, ptid
);
3321 target_update_thread_list (void)
3323 current_target
.to_update_thread_list (¤t_target
);
3327 target_stop (ptid_t ptid
)
3331 warning (_("May not interrupt or stop the target, ignoring attempt"));
3335 (*current_target
.to_stop
) (¤t_target
, ptid
);
3339 target_interrupt (ptid_t ptid
)
3343 warning (_("May not interrupt or stop the target, ignoring attempt"));
3347 (*current_target
.to_interrupt
) (¤t_target
, ptid
);
3353 target_check_pending_interrupt (void)
3355 (*current_target
.to_check_pending_interrupt
) (¤t_target
);
3358 /* See target/target.h. */
3361 target_stop_and_wait (ptid_t ptid
)
3363 struct target_waitstatus status
;
3364 int was_non_stop
= non_stop
;
3369 memset (&status
, 0, sizeof (status
));
3370 target_wait (ptid
, &status
, 0);
3372 non_stop
= was_non_stop
;
3375 /* See target/target.h. */
3378 target_continue_no_signal (ptid_t ptid
)
3380 target_resume (ptid
, 0, GDB_SIGNAL_0
);
3383 /* Concatenate ELEM to LIST, a comma separate list, and return the
3384 result. The LIST incoming argument is released. */
3387 str_comma_list_concat_elem (char *list
, const char *elem
)
3390 return xstrdup (elem
);
3392 return reconcat (list
, list
, ", ", elem
, (char *) NULL
);
3395 /* Helper for target_options_to_string. If OPT is present in
3396 TARGET_OPTIONS, append the OPT_STR (string version of OPT) in RET.
3397 Returns the new resulting string. OPT is removed from
3401 do_option (int *target_options
, char *ret
,
3402 int opt
, char *opt_str
)
3404 if ((*target_options
& opt
) != 0)
3406 ret
= str_comma_list_concat_elem (ret
, opt_str
);
3407 *target_options
&= ~opt
;
3414 target_options_to_string (int target_options
)
3418 #define DO_TARG_OPTION(OPT) \
3419 ret = do_option (&target_options, ret, OPT, #OPT)
3421 DO_TARG_OPTION (TARGET_WNOHANG
);
3423 if (target_options
!= 0)
3424 ret
= str_comma_list_concat_elem (ret
, "unknown???");
3432 debug_print_register (const char * func
,
3433 struct regcache
*regcache
, int regno
)
3435 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
3437 fprintf_unfiltered (gdb_stdlog
, "%s ", func
);
3438 if (regno
>= 0 && regno
< gdbarch_num_regs (gdbarch
)
3439 && gdbarch_register_name (gdbarch
, regno
) != NULL
3440 && gdbarch_register_name (gdbarch
, regno
)[0] != '\0')
3441 fprintf_unfiltered (gdb_stdlog
, "(%s)",
3442 gdbarch_register_name (gdbarch
, regno
));
3444 fprintf_unfiltered (gdb_stdlog
, "(%d)", regno
);
3445 if (regno
>= 0 && regno
< gdbarch_num_regs (gdbarch
))
3447 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
3448 int i
, size
= register_size (gdbarch
, regno
);
3449 gdb_byte buf
[MAX_REGISTER_SIZE
];
3451 regcache_raw_collect (regcache
, regno
, buf
);
3452 fprintf_unfiltered (gdb_stdlog
, " = ");
3453 for (i
= 0; i
< size
; i
++)
3455 fprintf_unfiltered (gdb_stdlog
, "%02x", buf
[i
]);
3457 if (size
<= sizeof (LONGEST
))
3459 ULONGEST val
= extract_unsigned_integer (buf
, size
, byte_order
);
3461 fprintf_unfiltered (gdb_stdlog
, " %s %s",
3462 core_addr_to_string_nz (val
), plongest (val
));
3465 fprintf_unfiltered (gdb_stdlog
, "\n");
3469 target_fetch_registers (struct regcache
*regcache
, int regno
)
3471 current_target
.to_fetch_registers (¤t_target
, regcache
, regno
);
3473 debug_print_register ("target_fetch_registers", regcache
, regno
);
3477 target_store_registers (struct regcache
*regcache
, int regno
)
3479 struct target_ops
*t
;
3481 if (!may_write_registers
)
3482 error (_("Writing to registers is not allowed (regno %d)"), regno
);
3484 current_target
.to_store_registers (¤t_target
, regcache
, regno
);
3487 debug_print_register ("target_store_registers", regcache
, regno
);
3492 target_core_of_thread (ptid_t ptid
)
3494 return current_target
.to_core_of_thread (¤t_target
, ptid
);
3498 simple_verify_memory (struct target_ops
*ops
,
3499 const gdb_byte
*data
, CORE_ADDR lma
, ULONGEST size
)
3501 LONGEST total_xfered
= 0;
3503 while (total_xfered
< size
)
3505 ULONGEST xfered_len
;
3506 enum target_xfer_status status
;
3508 ULONGEST howmuch
= min (sizeof (buf
), size
- total_xfered
);
3510 status
= target_xfer_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
3511 buf
, NULL
, lma
+ total_xfered
, howmuch
,
3513 if (status
== TARGET_XFER_OK
3514 && memcmp (data
+ total_xfered
, buf
, xfered_len
) == 0)
3516 total_xfered
+= xfered_len
;
3525 /* Default implementation of memory verification. */
3528 default_verify_memory (struct target_ops
*self
,
3529 const gdb_byte
*data
, CORE_ADDR memaddr
, ULONGEST size
)
3531 /* Start over from the top of the target stack. */
3532 return simple_verify_memory (current_target
.beneath
,
3533 data
, memaddr
, size
);
3537 target_verify_memory (const gdb_byte
*data
, CORE_ADDR memaddr
, ULONGEST size
)
3539 return current_target
.to_verify_memory (¤t_target
,
3540 data
, memaddr
, size
);
3543 /* The documentation for this function is in its prototype declaration in
3547 target_insert_mask_watchpoint (CORE_ADDR addr
, CORE_ADDR mask
,
3548 enum target_hw_bp_type rw
)
3550 return current_target
.to_insert_mask_watchpoint (¤t_target
,
3554 /* The documentation for this function is in its prototype declaration in
3558 target_remove_mask_watchpoint (CORE_ADDR addr
, CORE_ADDR mask
,
3559 enum target_hw_bp_type rw
)
3561 return current_target
.to_remove_mask_watchpoint (¤t_target
,
3565 /* The documentation for this function is in its prototype declaration
3569 target_masked_watch_num_registers (CORE_ADDR addr
, CORE_ADDR mask
)
3571 return current_target
.to_masked_watch_num_registers (¤t_target
,
3575 /* The documentation for this function is in its prototype declaration
3579 target_ranged_break_num_registers (void)
3581 return current_target
.to_ranged_break_num_registers (¤t_target
);
3587 target_supports_btrace (enum btrace_format format
)
3589 return current_target
.to_supports_btrace (¤t_target
, format
);
3594 struct btrace_target_info
*
3595 target_enable_btrace (ptid_t ptid
, const struct btrace_config
*conf
)
3597 return current_target
.to_enable_btrace (¤t_target
, ptid
, conf
);
3603 target_disable_btrace (struct btrace_target_info
*btinfo
)
3605 current_target
.to_disable_btrace (¤t_target
, btinfo
);
3611 target_teardown_btrace (struct btrace_target_info
*btinfo
)
3613 current_target
.to_teardown_btrace (¤t_target
, btinfo
);
3619 target_read_btrace (struct btrace_data
*btrace
,
3620 struct btrace_target_info
*btinfo
,
3621 enum btrace_read_type type
)
3623 return current_target
.to_read_btrace (¤t_target
, btrace
, btinfo
, type
);
3628 const struct btrace_config
*
3629 target_btrace_conf (const struct btrace_target_info
*btinfo
)
3631 return current_target
.to_btrace_conf (¤t_target
, btinfo
);
3637 target_stop_recording (void)
3639 current_target
.to_stop_recording (¤t_target
);
3645 target_save_record (const char *filename
)
3647 current_target
.to_save_record (¤t_target
, filename
);
3653 target_supports_delete_record (void)
3655 struct target_ops
*t
;
3657 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3658 if (t
->to_delete_record
!= delegate_delete_record
3659 && t
->to_delete_record
!= tdefault_delete_record
)
3668 target_delete_record (void)
3670 current_target
.to_delete_record (¤t_target
);
3676 target_record_is_replaying (ptid_t ptid
)
3678 return current_target
.to_record_is_replaying (¤t_target
, ptid
);
3684 target_record_will_replay (ptid_t ptid
, int dir
)
3686 return current_target
.to_record_will_replay (¤t_target
, ptid
, dir
);
3692 target_record_stop_replaying (void)
3694 current_target
.to_record_stop_replaying (¤t_target
);
3700 target_goto_record_begin (void)
3702 current_target
.to_goto_record_begin (¤t_target
);
3708 target_goto_record_end (void)
3710 current_target
.to_goto_record_end (¤t_target
);
3716 target_goto_record (ULONGEST insn
)
3718 current_target
.to_goto_record (¤t_target
, insn
);
3724 target_insn_history (int size
, int flags
)
3726 current_target
.to_insn_history (¤t_target
, size
, flags
);
3732 target_insn_history_from (ULONGEST from
, int size
, int flags
)
3734 current_target
.to_insn_history_from (¤t_target
, from
, size
, flags
);
3740 target_insn_history_range (ULONGEST begin
, ULONGEST end
, int flags
)
3742 current_target
.to_insn_history_range (¤t_target
, begin
, end
, flags
);
3748 target_call_history (int size
, int flags
)
3750 current_target
.to_call_history (¤t_target
, size
, flags
);
3756 target_call_history_from (ULONGEST begin
, int size
, int flags
)
3758 current_target
.to_call_history_from (¤t_target
, begin
, size
, flags
);
3764 target_call_history_range (ULONGEST begin
, ULONGEST end
, int flags
)
3766 current_target
.to_call_history_range (¤t_target
, begin
, end
, flags
);
3771 const struct frame_unwind
*
3772 target_get_unwinder (void)
3774 return current_target
.to_get_unwinder (¤t_target
);
3779 const struct frame_unwind
*
3780 target_get_tailcall_unwinder (void)
3782 return current_target
.to_get_tailcall_unwinder (¤t_target
);
3788 target_prepare_to_generate_core (void)
3790 current_target
.to_prepare_to_generate_core (¤t_target
);
3796 target_done_generating_core (void)
3798 current_target
.to_done_generating_core (¤t_target
);
3802 setup_target_debug (void)
3804 memcpy (&debug_target
, ¤t_target
, sizeof debug_target
);
3806 init_debug_target (¤t_target
);
3810 static char targ_desc
[] =
3811 "Names of targets and files being debugged.\nShows the entire \
3812 stack of targets currently in use (including the exec-file,\n\
3813 core-file, and process, if any), as well as the symbol file name.";
3816 default_rcmd (struct target_ops
*self
, const char *command
,
3817 struct ui_file
*output
)
3819 error (_("\"monitor\" command not supported by this target."));
3823 do_monitor_command (char *cmd
,
3826 target_rcmd (cmd
, gdb_stdtarg
);
3829 /* Print the name of each layers of our target stack. */
3832 maintenance_print_target_stack (char *cmd
, int from_tty
)
3834 struct target_ops
*t
;
3836 printf_filtered (_("The current target stack is:\n"));
3838 for (t
= target_stack
; t
!= NULL
; t
= t
->beneath
)
3840 printf_filtered (" - %s (%s)\n", t
->to_shortname
, t
->to_longname
);
3847 target_async (int enable
)
3849 infrun_async (enable
);
3850 current_target
.to_async (¤t_target
, enable
);
3856 target_thread_events (int enable
)
3858 current_target
.to_thread_events (¤t_target
, enable
);
3861 /* Controls if targets can report that they can/are async. This is
3862 just for maintainers to use when debugging gdb. */
3863 int target_async_permitted
= 1;
3865 /* The set command writes to this variable. If the inferior is
3866 executing, target_async_permitted is *not* updated. */
3867 static int target_async_permitted_1
= 1;
3870 maint_set_target_async_command (char *args
, int from_tty
,
3871 struct cmd_list_element
*c
)
3873 if (have_live_inferiors ())
3875 target_async_permitted_1
= target_async_permitted
;
3876 error (_("Cannot change this setting while the inferior is running."));
3879 target_async_permitted
= target_async_permitted_1
;
3883 maint_show_target_async_command (struct ui_file
*file
, int from_tty
,
3884 struct cmd_list_element
*c
,
3887 fprintf_filtered (file
,
3888 _("Controlling the inferior in "
3889 "asynchronous mode is %s.\n"), value
);
3892 /* Return true if the target operates in non-stop mode even with "set
3896 target_always_non_stop_p (void)
3898 return current_target
.to_always_non_stop_p (¤t_target
);
3904 target_is_non_stop_p (void)
3907 || target_non_stop_enabled
== AUTO_BOOLEAN_TRUE
3908 || (target_non_stop_enabled
== AUTO_BOOLEAN_AUTO
3909 && target_always_non_stop_p ()));
3912 /* Controls if targets can report that they always run in non-stop
3913 mode. This is just for maintainers to use when debugging gdb. */
3914 enum auto_boolean target_non_stop_enabled
= AUTO_BOOLEAN_AUTO
;
3916 /* The set command writes to this variable. If the inferior is
3917 executing, target_non_stop_enabled is *not* updated. */
3918 static enum auto_boolean target_non_stop_enabled_1
= AUTO_BOOLEAN_AUTO
;
3920 /* Implementation of "maint set target-non-stop". */
3923 maint_set_target_non_stop_command (char *args
, int from_tty
,
3924 struct cmd_list_element
*c
)
3926 if (have_live_inferiors ())
3928 target_non_stop_enabled_1
= target_non_stop_enabled
;
3929 error (_("Cannot change this setting while the inferior is running."));
3932 target_non_stop_enabled
= target_non_stop_enabled_1
;
3935 /* Implementation of "maint show target-non-stop". */
3938 maint_show_target_non_stop_command (struct ui_file
*file
, int from_tty
,
3939 struct cmd_list_element
*c
,
3942 if (target_non_stop_enabled
== AUTO_BOOLEAN_AUTO
)
3943 fprintf_filtered (file
,
3944 _("Whether the target is always in non-stop mode "
3945 "is %s (currently %s).\n"), value
,
3946 target_always_non_stop_p () ? "on" : "off");
3948 fprintf_filtered (file
,
3949 _("Whether the target is always in non-stop mode "
3950 "is %s.\n"), value
);
3953 /* Temporary copies of permission settings. */
3955 static int may_write_registers_1
= 1;
3956 static int may_write_memory_1
= 1;
3957 static int may_insert_breakpoints_1
= 1;
3958 static int may_insert_tracepoints_1
= 1;
3959 static int may_insert_fast_tracepoints_1
= 1;
3960 static int may_stop_1
= 1;
3962 /* Make the user-set values match the real values again. */
3965 update_target_permissions (void)
3967 may_write_registers_1
= may_write_registers
;
3968 may_write_memory_1
= may_write_memory
;
3969 may_insert_breakpoints_1
= may_insert_breakpoints
;
3970 may_insert_tracepoints_1
= may_insert_tracepoints
;
3971 may_insert_fast_tracepoints_1
= may_insert_fast_tracepoints
;
3972 may_stop_1
= may_stop
;
3975 /* The one function handles (most of) the permission flags in the same
3979 set_target_permissions (char *args
, int from_tty
,
3980 struct cmd_list_element
*c
)
3982 if (target_has_execution
)
3984 update_target_permissions ();
3985 error (_("Cannot change this setting while the inferior is running."));
3988 /* Make the real values match the user-changed values. */
3989 may_write_registers
= may_write_registers_1
;
3990 may_insert_breakpoints
= may_insert_breakpoints_1
;
3991 may_insert_tracepoints
= may_insert_tracepoints_1
;
3992 may_insert_fast_tracepoints
= may_insert_fast_tracepoints_1
;
3993 may_stop
= may_stop_1
;
3994 update_observer_mode ();
3997 /* Set memory write permission independently of observer mode. */
4000 set_write_memory_permission (char *args
, int from_tty
,
4001 struct cmd_list_element
*c
)
4003 /* Make the real values match the user-changed values. */
4004 may_write_memory
= may_write_memory_1
;
4005 update_observer_mode ();
4010 initialize_targets (void)
4012 init_dummy_target ();
4013 push_target (&dummy_target
);
4015 add_info ("target", target_info
, targ_desc
);
4016 add_info ("files", target_info
, targ_desc
);
4018 add_setshow_zuinteger_cmd ("target", class_maintenance
, &targetdebug
, _("\
4019 Set target debugging."), _("\
4020 Show target debugging."), _("\
4021 When non-zero, target debugging is enabled. Higher numbers are more\n\
4025 &setdebuglist
, &showdebuglist
);
4027 add_setshow_boolean_cmd ("trust-readonly-sections", class_support
,
4028 &trust_readonly
, _("\
4029 Set mode for reading from readonly sections."), _("\
4030 Show mode for reading from readonly sections."), _("\
4031 When this mode is on, memory reads from readonly sections (such as .text)\n\
4032 will be read from the object file instead of from the target. This will\n\
4033 result in significant performance improvement for remote targets."),
4035 show_trust_readonly
,
4036 &setlist
, &showlist
);
4038 add_com ("monitor", class_obscure
, do_monitor_command
,
4039 _("Send a command to the remote monitor (remote targets only)."));
4041 add_cmd ("target-stack", class_maintenance
, maintenance_print_target_stack
,
4042 _("Print the name of each layer of the internal target stack."),
4043 &maintenanceprintlist
);
4045 add_setshow_boolean_cmd ("target-async", no_class
,
4046 &target_async_permitted_1
, _("\
4047 Set whether gdb controls the inferior in asynchronous mode."), _("\
4048 Show whether gdb controls the inferior in asynchronous mode."), _("\
4049 Tells gdb whether to control the inferior in asynchronous mode."),
4050 maint_set_target_async_command
,
4051 maint_show_target_async_command
,
4052 &maintenance_set_cmdlist
,
4053 &maintenance_show_cmdlist
);
4055 add_setshow_auto_boolean_cmd ("target-non-stop", no_class
,
4056 &target_non_stop_enabled_1
, _("\
4057 Set whether gdb always controls the inferior in non-stop mode."), _("\
4058 Show whether gdb always controls the inferior in non-stop mode."), _("\
4059 Tells gdb whether to control the inferior in non-stop mode."),
4060 maint_set_target_non_stop_command
,
4061 maint_show_target_non_stop_command
,
4062 &maintenance_set_cmdlist
,
4063 &maintenance_show_cmdlist
);
4065 add_setshow_boolean_cmd ("may-write-registers", class_support
,
4066 &may_write_registers_1
, _("\
4067 Set permission to write into registers."), _("\
4068 Show permission to write into registers."), _("\
4069 When this permission is on, GDB may write into the target's registers.\n\
4070 Otherwise, any sort of write attempt will result in an error."),
4071 set_target_permissions
, NULL
,
4072 &setlist
, &showlist
);
4074 add_setshow_boolean_cmd ("may-write-memory", class_support
,
4075 &may_write_memory_1
, _("\
4076 Set permission to write into target memory."), _("\
4077 Show permission to write into target memory."), _("\
4078 When this permission is on, GDB may write into the target's memory.\n\
4079 Otherwise, any sort of write attempt will result in an error."),
4080 set_write_memory_permission
, NULL
,
4081 &setlist
, &showlist
);
4083 add_setshow_boolean_cmd ("may-insert-breakpoints", class_support
,
4084 &may_insert_breakpoints_1
, _("\
4085 Set permission to insert breakpoints in the target."), _("\
4086 Show permission to insert breakpoints in the target."), _("\
4087 When this permission is on, GDB may insert breakpoints in the program.\n\
4088 Otherwise, any sort of insertion attempt will result in an error."),
4089 set_target_permissions
, NULL
,
4090 &setlist
, &showlist
);
4092 add_setshow_boolean_cmd ("may-insert-tracepoints", class_support
,
4093 &may_insert_tracepoints_1
, _("\
4094 Set permission to insert tracepoints in the target."), _("\
4095 Show permission to insert tracepoints in the target."), _("\
4096 When this permission is on, GDB may insert tracepoints in the program.\n\
4097 Otherwise, any sort of insertion attempt will result in an error."),
4098 set_target_permissions
, NULL
,
4099 &setlist
, &showlist
);
4101 add_setshow_boolean_cmd ("may-insert-fast-tracepoints", class_support
,
4102 &may_insert_fast_tracepoints_1
, _("\
4103 Set permission to insert fast tracepoints in the target."), _("\
4104 Show permission to insert fast tracepoints in the target."), _("\
4105 When this permission is on, GDB may insert fast tracepoints.\n\
4106 Otherwise, any sort of insertion attempt will result in an error."),
4107 set_target_permissions
, NULL
,
4108 &setlist
, &showlist
);
4110 add_setshow_boolean_cmd ("may-interrupt", class_support
,
4112 Set permission to interrupt or signal the target."), _("\
4113 Show permission to interrupt or signal the target."), _("\
4114 When this permission is on, GDB may interrupt/stop the target's execution.\n\
4115 Otherwise, any attempt to interrupt or stop will be ignored."),
4116 set_target_permissions
, NULL
,
4117 &setlist
, &showlist
);
4119 add_setshow_boolean_cmd ("auto-connect-native-target", class_support
,
4120 &auto_connect_native_target
, _("\
4121 Set whether GDB may automatically connect to the native target."), _("\
4122 Show whether GDB may automatically connect to the native target."), _("\
4123 When on, and GDB is not connected to a target yet, GDB\n\
4124 attempts \"run\" and other commands with the native target."),
4125 NULL
, show_auto_connect_native_target
,
4126 &setlist
, &showlist
);