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
= 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
;
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
= 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
= xmalloc (sizeof (*ts
));
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. */
750 pop_all_targets_above (enum strata above_stratum
)
752 while ((int) (current_target
.to_stratum
) > (int) above_stratum
)
754 if (!unpush_target (target_stack
))
756 fprintf_unfiltered (gdb_stderr
,
757 "pop_all_targets couldn't find target %s\n",
758 target_stack
->to_shortname
);
759 internal_error (__FILE__
, __LINE__
,
760 _("failed internal consistency check"));
767 pop_all_targets (void)
769 pop_all_targets_above (dummy_stratum
);
772 /* Return 1 if T is now pushed in the target stack. Return 0 otherwise. */
775 target_is_pushed (struct target_ops
*t
)
777 struct target_ops
*cur
;
779 /* Check magic number. If wrong, it probably means someone changed
780 the struct definition, but not all the places that initialize one. */
781 if (t
->to_magic
!= OPS_MAGIC
)
783 fprintf_unfiltered (gdb_stderr
,
784 "Magic number of %s target struct wrong\n",
786 internal_error (__FILE__
, __LINE__
,
787 _("failed internal consistency check"));
790 for (cur
= target_stack
; cur
!= NULL
; cur
= cur
->beneath
)
797 /* Default implementation of to_get_thread_local_address. */
800 generic_tls_error (void)
802 throw_error (TLS_GENERIC_ERROR
,
803 _("Cannot find thread-local variables on this target"));
806 /* Using the objfile specified in OBJFILE, find the address for the
807 current thread's thread-local storage with offset OFFSET. */
809 target_translate_tls_address (struct objfile
*objfile
, CORE_ADDR offset
)
811 volatile CORE_ADDR addr
= 0;
812 struct target_ops
*target
= ¤t_target
;
814 if (gdbarch_fetch_tls_load_module_address_p (target_gdbarch ()))
816 ptid_t ptid
= inferior_ptid
;
822 /* Fetch the load module address for this objfile. */
823 lm_addr
= gdbarch_fetch_tls_load_module_address (target_gdbarch (),
826 addr
= target
->to_get_thread_local_address (target
, ptid
,
829 /* If an error occurred, print TLS related messages here. Otherwise,
830 throw the error to some higher catcher. */
831 CATCH (ex
, RETURN_MASK_ALL
)
833 int objfile_is_library
= (objfile
->flags
& OBJF_SHARED
);
837 case TLS_NO_LIBRARY_SUPPORT_ERROR
:
838 error (_("Cannot find thread-local variables "
839 "in this thread library."));
841 case TLS_LOAD_MODULE_NOT_FOUND_ERROR
:
842 if (objfile_is_library
)
843 error (_("Cannot find shared library `%s' in dynamic"
844 " linker's load module list"), objfile_name (objfile
));
846 error (_("Cannot find executable file `%s' in dynamic"
847 " linker's load module list"), objfile_name (objfile
));
849 case TLS_NOT_ALLOCATED_YET_ERROR
:
850 if (objfile_is_library
)
851 error (_("The inferior has not yet allocated storage for"
852 " thread-local variables in\n"
853 "the shared library `%s'\n"
855 objfile_name (objfile
), target_pid_to_str (ptid
));
857 error (_("The inferior has not yet allocated storage for"
858 " thread-local variables in\n"
859 "the executable `%s'\n"
861 objfile_name (objfile
), target_pid_to_str (ptid
));
863 case TLS_GENERIC_ERROR
:
864 if (objfile_is_library
)
865 error (_("Cannot find thread-local storage for %s, "
866 "shared library %s:\n%s"),
867 target_pid_to_str (ptid
),
868 objfile_name (objfile
), ex
.message
);
870 error (_("Cannot find thread-local storage for %s, "
871 "executable file %s:\n%s"),
872 target_pid_to_str (ptid
),
873 objfile_name (objfile
), ex
.message
);
876 throw_exception (ex
);
882 /* It wouldn't be wrong here to try a gdbarch method, too; finding
883 TLS is an ABI-specific thing. But we don't do that yet. */
885 error (_("Cannot find thread-local variables on this target"));
891 target_xfer_status_to_string (enum target_xfer_status status
)
893 #define CASE(X) case X: return #X
896 CASE(TARGET_XFER_E_IO
);
897 CASE(TARGET_XFER_UNAVAILABLE
);
906 #define MIN(A, B) (((A) <= (B)) ? (A) : (B))
908 /* target_read_string -- read a null terminated string, up to LEN bytes,
909 from MEMADDR in target. Set *ERRNOP to the errno code, or 0 if successful.
910 Set *STRING to a pointer to malloc'd memory containing the data; the caller
911 is responsible for freeing it. Return the number of bytes successfully
915 target_read_string (CORE_ADDR memaddr
, char **string
, int len
, int *errnop
)
921 int buffer_allocated
;
923 unsigned int nbytes_read
= 0;
927 /* Small for testing. */
928 buffer_allocated
= 4;
929 buffer
= xmalloc (buffer_allocated
);
934 tlen
= MIN (len
, 4 - (memaddr
& 3));
935 offset
= memaddr
& 3;
937 errcode
= target_read_memory (memaddr
& ~3, buf
, sizeof buf
);
940 /* The transfer request might have crossed the boundary to an
941 unallocated region of memory. Retry the transfer, requesting
945 errcode
= target_read_memory (memaddr
, buf
, 1);
950 if (bufptr
- buffer
+ tlen
> buffer_allocated
)
954 bytes
= bufptr
- buffer
;
955 buffer_allocated
*= 2;
956 buffer
= xrealloc (buffer
, buffer_allocated
);
957 bufptr
= buffer
+ bytes
;
960 for (i
= 0; i
< tlen
; i
++)
962 *bufptr
++ = buf
[i
+ offset
];
963 if (buf
[i
+ offset
] == '\000')
965 nbytes_read
+= i
+ 1;
981 struct target_section_table
*
982 target_get_section_table (struct target_ops
*target
)
984 return (*target
->to_get_section_table
) (target
);
987 /* Find a section containing ADDR. */
989 struct target_section
*
990 target_section_by_addr (struct target_ops
*target
, CORE_ADDR addr
)
992 struct target_section_table
*table
= target_get_section_table (target
);
993 struct target_section
*secp
;
998 for (secp
= table
->sections
; secp
< table
->sections_end
; secp
++)
1000 if (addr
>= secp
->addr
&& addr
< secp
->endaddr
)
1007 /* Helper for the memory xfer routines. Checks the attributes of the
1008 memory region of MEMADDR against the read or write being attempted.
1009 If the access is permitted returns true, otherwise returns false.
1010 REGION_P is an optional output parameter. If not-NULL, it is
1011 filled with a pointer to the memory region of MEMADDR. REG_LEN
1012 returns LEN trimmed to the end of the region. This is how much the
1013 caller can continue requesting, if the access is permitted. A
1014 single xfer request must not straddle memory region boundaries. */
1017 memory_xfer_check_region (gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1018 ULONGEST memaddr
, ULONGEST len
, ULONGEST
*reg_len
,
1019 struct mem_region
**region_p
)
1021 struct mem_region
*region
;
1023 region
= lookup_mem_region (memaddr
);
1025 if (region_p
!= NULL
)
1028 switch (region
->attrib
.mode
)
1031 if (writebuf
!= NULL
)
1036 if (readbuf
!= NULL
)
1041 /* We only support writing to flash during "load" for now. */
1042 if (writebuf
!= NULL
)
1043 error (_("Writing to flash memory forbidden in this context"));
1050 /* region->hi == 0 means there's no upper bound. */
1051 if (memaddr
+ len
< region
->hi
|| region
->hi
== 0)
1054 *reg_len
= region
->hi
- memaddr
;
1059 /* Read memory from more than one valid target. A core file, for
1060 instance, could have some of memory but delegate other bits to
1061 the target below it. So, we must manually try all targets. */
1063 static enum target_xfer_status
1064 raw_memory_xfer_partial (struct target_ops
*ops
, gdb_byte
*readbuf
,
1065 const gdb_byte
*writebuf
, ULONGEST memaddr
, LONGEST len
,
1066 ULONGEST
*xfered_len
)
1068 enum target_xfer_status res
;
1072 res
= ops
->to_xfer_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1073 readbuf
, writebuf
, memaddr
, len
,
1075 if (res
== TARGET_XFER_OK
)
1078 /* Stop if the target reports that the memory is not available. */
1079 if (res
== TARGET_XFER_UNAVAILABLE
)
1082 /* We want to continue past core files to executables, but not
1083 past a running target's memory. */
1084 if (ops
->to_has_all_memory (ops
))
1089 while (ops
!= NULL
);
1091 /* The cache works at the raw memory level. Make sure the cache
1092 gets updated with raw contents no matter what kind of memory
1093 object was originally being written. Note we do write-through
1094 first, so that if it fails, we don't write to the cache contents
1095 that never made it to the target. */
1096 if (writebuf
!= NULL
1097 && !ptid_equal (inferior_ptid
, null_ptid
)
1098 && target_dcache_init_p ()
1099 && (stack_cache_enabled_p () || code_cache_enabled_p ()))
1101 DCACHE
*dcache
= target_dcache_get ();
1103 /* Note that writing to an area of memory which wasn't present
1104 in the cache doesn't cause it to be loaded in. */
1105 dcache_update (dcache
, res
, memaddr
, writebuf
, *xfered_len
);
1111 /* Perform a partial memory transfer.
1112 For docs see target.h, to_xfer_partial. */
1114 static enum target_xfer_status
1115 memory_xfer_partial_1 (struct target_ops
*ops
, enum target_object object
,
1116 gdb_byte
*readbuf
, const gdb_byte
*writebuf
, ULONGEST memaddr
,
1117 ULONGEST len
, ULONGEST
*xfered_len
)
1119 enum target_xfer_status res
;
1121 struct mem_region
*region
;
1122 struct inferior
*inf
;
1124 /* For accesses to unmapped overlay sections, read directly from
1125 files. Must do this first, as MEMADDR may need adjustment. */
1126 if (readbuf
!= NULL
&& overlay_debugging
)
1128 struct obj_section
*section
= find_pc_overlay (memaddr
);
1130 if (pc_in_unmapped_range (memaddr
, section
))
1132 struct target_section_table
*table
1133 = target_get_section_table (ops
);
1134 const char *section_name
= section
->the_bfd_section
->name
;
1136 memaddr
= overlay_mapped_address (memaddr
, section
);
1137 return section_table_xfer_memory_partial (readbuf
, writebuf
,
1138 memaddr
, len
, xfered_len
,
1140 table
->sections_end
,
1145 /* Try the executable files, if "trust-readonly-sections" is set. */
1146 if (readbuf
!= NULL
&& trust_readonly
)
1148 struct target_section
*secp
;
1149 struct target_section_table
*table
;
1151 secp
= target_section_by_addr (ops
, memaddr
);
1153 && (bfd_get_section_flags (secp
->the_bfd_section
->owner
,
1154 secp
->the_bfd_section
)
1157 table
= target_get_section_table (ops
);
1158 return section_table_xfer_memory_partial (readbuf
, writebuf
,
1159 memaddr
, len
, xfered_len
,
1161 table
->sections_end
,
1166 /* Try GDB's internal data cache. */
1168 if (!memory_xfer_check_region (readbuf
, writebuf
, memaddr
, len
, ®_len
,
1170 return TARGET_XFER_E_IO
;
1172 if (!ptid_equal (inferior_ptid
, null_ptid
))
1173 inf
= find_inferior_ptid (inferior_ptid
);
1179 /* The dcache reads whole cache lines; that doesn't play well
1180 with reading from a trace buffer, because reading outside of
1181 the collected memory range fails. */
1182 && get_traceframe_number () == -1
1183 && (region
->attrib
.cache
1184 || (stack_cache_enabled_p () && object
== TARGET_OBJECT_STACK_MEMORY
)
1185 || (code_cache_enabled_p () && object
== TARGET_OBJECT_CODE_MEMORY
)))
1187 DCACHE
*dcache
= target_dcache_get_or_init ();
1189 return dcache_read_memory_partial (ops
, dcache
, memaddr
, readbuf
,
1190 reg_len
, xfered_len
);
1193 /* If none of those methods found the memory we wanted, fall back
1194 to a target partial transfer. Normally a single call to
1195 to_xfer_partial is enough; if it doesn't recognize an object
1196 it will call the to_xfer_partial of the next target down.
1197 But for memory this won't do. Memory is the only target
1198 object which can be read from more than one valid target.
1199 A core file, for instance, could have some of memory but
1200 delegate other bits to the target below it. So, we must
1201 manually try all targets. */
1203 res
= raw_memory_xfer_partial (ops
, readbuf
, writebuf
, memaddr
, reg_len
,
1206 /* If we still haven't got anything, return the last error. We
1211 /* Perform a partial memory transfer. For docs see target.h,
1214 static enum target_xfer_status
1215 memory_xfer_partial (struct target_ops
*ops
, enum target_object object
,
1216 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1217 ULONGEST memaddr
, ULONGEST len
, ULONGEST
*xfered_len
)
1219 enum target_xfer_status res
;
1221 /* Zero length requests are ok and require no work. */
1223 return TARGET_XFER_EOF
;
1225 /* Fill in READBUF with breakpoint shadows, or WRITEBUF with
1226 breakpoint insns, thus hiding out from higher layers whether
1227 there are software breakpoints inserted in the code stream. */
1228 if (readbuf
!= NULL
)
1230 res
= memory_xfer_partial_1 (ops
, object
, readbuf
, NULL
, memaddr
, len
,
1233 if (res
== TARGET_XFER_OK
&& !show_memory_breakpoints
)
1234 breakpoint_xfer_memory (readbuf
, NULL
, NULL
, memaddr
, *xfered_len
);
1239 struct cleanup
*old_chain
;
1241 /* A large write request is likely to be partially satisfied
1242 by memory_xfer_partial_1. We will continually malloc
1243 and free a copy of the entire write request for breakpoint
1244 shadow handling even though we only end up writing a small
1245 subset of it. Cap writes to 4KB to mitigate this. */
1246 len
= min (4096, len
);
1248 buf
= xmalloc (len
);
1249 old_chain
= make_cleanup (xfree
, buf
);
1250 memcpy (buf
, writebuf
, len
);
1252 breakpoint_xfer_memory (NULL
, buf
, writebuf
, memaddr
, len
);
1253 res
= memory_xfer_partial_1 (ops
, object
, NULL
, buf
, memaddr
, len
,
1256 do_cleanups (old_chain
);
1263 restore_show_memory_breakpoints (void *arg
)
1265 show_memory_breakpoints
= (uintptr_t) arg
;
1269 make_show_memory_breakpoints_cleanup (int show
)
1271 int current
= show_memory_breakpoints
;
1273 show_memory_breakpoints
= show
;
1274 return make_cleanup (restore_show_memory_breakpoints
,
1275 (void *) (uintptr_t) current
);
1278 /* For docs see target.h, to_xfer_partial. */
1280 enum target_xfer_status
1281 target_xfer_partial (struct target_ops
*ops
,
1282 enum target_object object
, const char *annex
,
1283 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1284 ULONGEST offset
, ULONGEST len
,
1285 ULONGEST
*xfered_len
)
1287 enum target_xfer_status retval
;
1289 gdb_assert (ops
->to_xfer_partial
!= NULL
);
1291 /* Transfer is done when LEN is zero. */
1293 return TARGET_XFER_EOF
;
1295 if (writebuf
&& !may_write_memory
)
1296 error (_("Writing to memory is not allowed (addr %s, len %s)"),
1297 core_addr_to_string_nz (offset
), plongest (len
));
1301 /* If this is a memory transfer, let the memory-specific code
1302 have a look at it instead. Memory transfers are more
1304 if (object
== TARGET_OBJECT_MEMORY
|| object
== TARGET_OBJECT_STACK_MEMORY
1305 || object
== TARGET_OBJECT_CODE_MEMORY
)
1306 retval
= memory_xfer_partial (ops
, object
, readbuf
,
1307 writebuf
, offset
, len
, xfered_len
);
1308 else if (object
== TARGET_OBJECT_RAW_MEMORY
)
1310 /* Skip/avoid accessing the target if the memory region
1311 attributes block the access. Check this here instead of in
1312 raw_memory_xfer_partial as otherwise we'd end up checking
1313 this twice in the case of the memory_xfer_partial path is
1314 taken; once before checking the dcache, and another in the
1315 tail call to raw_memory_xfer_partial. */
1316 if (!memory_xfer_check_region (readbuf
, writebuf
, offset
, len
, &len
,
1318 return TARGET_XFER_E_IO
;
1320 /* Request the normal memory object from other layers. */
1321 retval
= raw_memory_xfer_partial (ops
, readbuf
, writebuf
, offset
, len
,
1325 retval
= ops
->to_xfer_partial (ops
, object
, annex
, readbuf
,
1326 writebuf
, offset
, len
, xfered_len
);
1330 const unsigned char *myaddr
= NULL
;
1332 fprintf_unfiltered (gdb_stdlog
,
1333 "%s:target_xfer_partial "
1334 "(%d, %s, %s, %s, %s, %s) = %d, %s",
1337 (annex
? annex
: "(null)"),
1338 host_address_to_string (readbuf
),
1339 host_address_to_string (writebuf
),
1340 core_addr_to_string_nz (offset
),
1341 pulongest (len
), retval
,
1342 pulongest (*xfered_len
));
1348 if (retval
== TARGET_XFER_OK
&& myaddr
!= NULL
)
1352 fputs_unfiltered (", bytes =", gdb_stdlog
);
1353 for (i
= 0; i
< *xfered_len
; i
++)
1355 if ((((intptr_t) &(myaddr
[i
])) & 0xf) == 0)
1357 if (targetdebug
< 2 && i
> 0)
1359 fprintf_unfiltered (gdb_stdlog
, " ...");
1362 fprintf_unfiltered (gdb_stdlog
, "\n");
1365 fprintf_unfiltered (gdb_stdlog
, " %02x", myaddr
[i
] & 0xff);
1369 fputc_unfiltered ('\n', gdb_stdlog
);
1372 /* Check implementations of to_xfer_partial update *XFERED_LEN
1373 properly. Do assertion after printing debug messages, so that we
1374 can find more clues on assertion failure from debugging messages. */
1375 if (retval
== TARGET_XFER_OK
|| retval
== TARGET_XFER_UNAVAILABLE
)
1376 gdb_assert (*xfered_len
> 0);
1381 /* Read LEN bytes of target memory at address MEMADDR, placing the
1382 results in GDB's memory at MYADDR. Returns either 0 for success or
1383 TARGET_XFER_E_IO if any error occurs.
1385 If an error occurs, no guarantee is made about the contents of the data at
1386 MYADDR. In particular, the caller should not depend upon partial reads
1387 filling the buffer with good data. There is no way for the caller to know
1388 how much good data might have been transfered anyway. Callers that can
1389 deal with partial reads should call target_read (which will retry until
1390 it makes no progress, and then return how much was transferred). */
1393 target_read_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1395 /* Dispatch to the topmost target, not the flattened current_target.
1396 Memory accesses check target->to_has_(all_)memory, and the
1397 flattened target doesn't inherit those. */
1398 if (target_read (current_target
.beneath
, TARGET_OBJECT_MEMORY
, NULL
,
1399 myaddr
, memaddr
, len
) == len
)
1402 return TARGET_XFER_E_IO
;
1405 /* See target/target.h. */
1408 target_read_uint32 (CORE_ADDR memaddr
, uint32_t *result
)
1413 r
= target_read_memory (memaddr
, buf
, sizeof buf
);
1416 *result
= extract_unsigned_integer (buf
, sizeof buf
,
1417 gdbarch_byte_order (target_gdbarch ()));
1421 /* Like target_read_memory, but specify explicitly that this is a read
1422 from the target's raw memory. That is, this read bypasses the
1423 dcache, breakpoint shadowing, etc. */
1426 target_read_raw_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1428 /* See comment in target_read_memory about why the request starts at
1429 current_target.beneath. */
1430 if (target_read (current_target
.beneath
, TARGET_OBJECT_RAW_MEMORY
, NULL
,
1431 myaddr
, memaddr
, len
) == len
)
1434 return TARGET_XFER_E_IO
;
1437 /* Like target_read_memory, but specify explicitly that this is a read from
1438 the target's stack. This may trigger different cache behavior. */
1441 target_read_stack (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1443 /* See comment in target_read_memory about why the request starts at
1444 current_target.beneath. */
1445 if (target_read (current_target
.beneath
, TARGET_OBJECT_STACK_MEMORY
, NULL
,
1446 myaddr
, memaddr
, len
) == len
)
1449 return TARGET_XFER_E_IO
;
1452 /* Like target_read_memory, but specify explicitly that this is a read from
1453 the target's code. This may trigger different cache behavior. */
1456 target_read_code (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1458 /* See comment in target_read_memory about why the request starts at
1459 current_target.beneath. */
1460 if (target_read (current_target
.beneath
, TARGET_OBJECT_CODE_MEMORY
, NULL
,
1461 myaddr
, memaddr
, len
) == len
)
1464 return TARGET_XFER_E_IO
;
1467 /* Write LEN bytes from MYADDR to target memory at address MEMADDR.
1468 Returns either 0 for success or TARGET_XFER_E_IO if any
1469 error occurs. If an error occurs, no guarantee is made about how
1470 much data got written. Callers that can deal with partial writes
1471 should call target_write. */
1474 target_write_memory (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ssize_t len
)
1476 /* See comment in target_read_memory about why the request starts at
1477 current_target.beneath. */
1478 if (target_write (current_target
.beneath
, TARGET_OBJECT_MEMORY
, NULL
,
1479 myaddr
, memaddr
, len
) == len
)
1482 return TARGET_XFER_E_IO
;
1485 /* Write LEN bytes from MYADDR to target raw memory at address
1486 MEMADDR. Returns either 0 for success or TARGET_XFER_E_IO
1487 if any error occurs. If an error occurs, no guarantee is made
1488 about how much data got written. Callers that can deal with
1489 partial writes should call target_write. */
1492 target_write_raw_memory (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ssize_t len
)
1494 /* See comment in target_read_memory about why the request starts at
1495 current_target.beneath. */
1496 if (target_write (current_target
.beneath
, TARGET_OBJECT_RAW_MEMORY
, NULL
,
1497 myaddr
, memaddr
, len
) == len
)
1500 return TARGET_XFER_E_IO
;
1503 /* Fetch the target's memory map. */
1506 target_memory_map (void)
1508 VEC(mem_region_s
) *result
;
1509 struct mem_region
*last_one
, *this_one
;
1511 struct target_ops
*t
;
1513 result
= current_target
.to_memory_map (¤t_target
);
1517 qsort (VEC_address (mem_region_s
, result
),
1518 VEC_length (mem_region_s
, result
),
1519 sizeof (struct mem_region
), mem_region_cmp
);
1521 /* Check that regions do not overlap. Simultaneously assign
1522 a numbering for the "mem" commands to use to refer to
1525 for (ix
= 0; VEC_iterate (mem_region_s
, result
, ix
, this_one
); ix
++)
1527 this_one
->number
= ix
;
1529 if (last_one
&& last_one
->hi
> this_one
->lo
)
1531 warning (_("Overlapping regions in memory map: ignoring"));
1532 VEC_free (mem_region_s
, result
);
1535 last_one
= this_one
;
1542 target_flash_erase (ULONGEST address
, LONGEST length
)
1544 current_target
.to_flash_erase (¤t_target
, address
, length
);
1548 target_flash_done (void)
1550 current_target
.to_flash_done (¤t_target
);
1554 show_trust_readonly (struct ui_file
*file
, int from_tty
,
1555 struct cmd_list_element
*c
, const char *value
)
1557 fprintf_filtered (file
,
1558 _("Mode for reading from readonly sections is %s.\n"),
1562 /* Target vector read/write partial wrapper functions. */
1564 static enum target_xfer_status
1565 target_read_partial (struct target_ops
*ops
,
1566 enum target_object object
,
1567 const char *annex
, gdb_byte
*buf
,
1568 ULONGEST offset
, ULONGEST len
,
1569 ULONGEST
*xfered_len
)
1571 return target_xfer_partial (ops
, object
, annex
, buf
, NULL
, offset
, len
,
1575 static enum target_xfer_status
1576 target_write_partial (struct target_ops
*ops
,
1577 enum target_object object
,
1578 const char *annex
, const gdb_byte
*buf
,
1579 ULONGEST offset
, LONGEST len
, ULONGEST
*xfered_len
)
1581 return target_xfer_partial (ops
, object
, annex
, NULL
, buf
, offset
, len
,
1585 /* Wrappers to perform the full transfer. */
1587 /* For docs on target_read see target.h. */
1590 target_read (struct target_ops
*ops
,
1591 enum target_object object
,
1592 const char *annex
, gdb_byte
*buf
,
1593 ULONGEST offset
, LONGEST len
)
1595 LONGEST xfered_total
= 0;
1598 /* If we are reading from a memory object, find the length of an addressable
1599 unit for that architecture. */
1600 if (object
== TARGET_OBJECT_MEMORY
1601 || object
== TARGET_OBJECT_STACK_MEMORY
1602 || object
== TARGET_OBJECT_CODE_MEMORY
1603 || object
== TARGET_OBJECT_RAW_MEMORY
)
1604 unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
1606 while (xfered_total
< len
)
1608 ULONGEST xfered_partial
;
1609 enum target_xfer_status status
;
1611 status
= target_read_partial (ops
, object
, annex
,
1612 buf
+ xfered_total
* unit_size
,
1613 offset
+ xfered_total
, len
- xfered_total
,
1616 /* Call an observer, notifying them of the xfer progress? */
1617 if (status
== TARGET_XFER_EOF
)
1618 return xfered_total
;
1619 else if (status
== TARGET_XFER_OK
)
1621 xfered_total
+= xfered_partial
;
1625 return TARGET_XFER_E_IO
;
1631 /* Assuming that the entire [begin, end) range of memory cannot be
1632 read, try to read whatever subrange is possible to read.
1634 The function returns, in RESULT, either zero or one memory block.
1635 If there's a readable subrange at the beginning, it is completely
1636 read and returned. Any further readable subrange will not be read.
1637 Otherwise, if there's a readable subrange at the end, it will be
1638 completely read and returned. Any readable subranges before it
1639 (obviously, not starting at the beginning), will be ignored. In
1640 other cases -- either no readable subrange, or readable subrange(s)
1641 that is neither at the beginning, or end, nothing is returned.
1643 The purpose of this function is to handle a read across a boundary
1644 of accessible memory in a case when memory map is not available.
1645 The above restrictions are fine for this case, but will give
1646 incorrect results if the memory is 'patchy'. However, supporting
1647 'patchy' memory would require trying to read every single byte,
1648 and it seems unacceptable solution. Explicit memory map is
1649 recommended for this case -- and target_read_memory_robust will
1650 take care of reading multiple ranges then. */
1653 read_whatever_is_readable (struct target_ops
*ops
,
1654 const ULONGEST begin
, const ULONGEST end
,
1656 VEC(memory_read_result_s
) **result
)
1658 gdb_byte
*buf
= xmalloc (end
- begin
);
1659 ULONGEST current_begin
= begin
;
1660 ULONGEST current_end
= end
;
1662 memory_read_result_s r
;
1663 ULONGEST xfered_len
;
1665 /* If we previously failed to read 1 byte, nothing can be done here. */
1666 if (end
- begin
<= 1)
1672 /* Check that either first or the last byte is readable, and give up
1673 if not. This heuristic is meant to permit reading accessible memory
1674 at the boundary of accessible region. */
1675 if (target_read_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1676 buf
, begin
, 1, &xfered_len
) == TARGET_XFER_OK
)
1681 else if (target_read_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1682 buf
+ (end
- begin
) - 1, end
- 1, 1,
1683 &xfered_len
) == TARGET_XFER_OK
)
1694 /* Loop invariant is that the [current_begin, current_end) was previously
1695 found to be not readable as a whole.
1697 Note loop condition -- if the range has 1 byte, we can't divide the range
1698 so there's no point trying further. */
1699 while (current_end
- current_begin
> 1)
1701 ULONGEST first_half_begin
, first_half_end
;
1702 ULONGEST second_half_begin
, second_half_end
;
1704 ULONGEST middle
= current_begin
+ (current_end
- current_begin
) / 2;
1708 first_half_begin
= current_begin
;
1709 first_half_end
= middle
;
1710 second_half_begin
= middle
;
1711 second_half_end
= current_end
;
1715 first_half_begin
= middle
;
1716 first_half_end
= current_end
;
1717 second_half_begin
= current_begin
;
1718 second_half_end
= middle
;
1721 xfer
= target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1722 buf
+ (first_half_begin
- begin
) * unit_size
,
1724 first_half_end
- first_half_begin
);
1726 if (xfer
== first_half_end
- first_half_begin
)
1728 /* This half reads up fine. So, the error must be in the
1730 current_begin
= second_half_begin
;
1731 current_end
= second_half_end
;
1735 /* This half is not readable. Because we've tried one byte, we
1736 know some part of this half if actually readable. Go to the next
1737 iteration to divide again and try to read.
1739 We don't handle the other half, because this function only tries
1740 to read a single readable subrange. */
1741 current_begin
= first_half_begin
;
1742 current_end
= first_half_end
;
1748 /* The [begin, current_begin) range has been read. */
1750 r
.end
= current_begin
;
1755 /* The [current_end, end) range has been read. */
1756 LONGEST region_len
= end
- current_end
;
1758 r
.data
= xmalloc (region_len
* unit_size
);
1759 memcpy (r
.data
, buf
+ (current_end
- begin
) * unit_size
,
1760 region_len
* unit_size
);
1761 r
.begin
= current_end
;
1765 VEC_safe_push(memory_read_result_s
, (*result
), &r
);
1769 free_memory_read_result_vector (void *x
)
1771 VEC(memory_read_result_s
) *v
= x
;
1772 memory_read_result_s
*current
;
1775 for (ix
= 0; VEC_iterate (memory_read_result_s
, v
, ix
, current
); ++ix
)
1777 xfree (current
->data
);
1779 VEC_free (memory_read_result_s
, v
);
1782 VEC(memory_read_result_s
) *
1783 read_memory_robust (struct target_ops
*ops
,
1784 const ULONGEST offset
, const LONGEST len
)
1786 VEC(memory_read_result_s
) *result
= 0;
1787 int unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
1789 LONGEST xfered_total
= 0;
1790 while (xfered_total
< len
)
1792 struct mem_region
*region
= lookup_mem_region (offset
+ xfered_total
);
1795 /* If there is no explicit region, a fake one should be created. */
1796 gdb_assert (region
);
1798 if (region
->hi
== 0)
1799 region_len
= len
- xfered_total
;
1801 region_len
= region
->hi
- offset
;
1803 if (region
->attrib
.mode
== MEM_NONE
|| region
->attrib
.mode
== MEM_WO
)
1805 /* Cannot read this region. Note that we can end up here only
1806 if the region is explicitly marked inaccessible, or
1807 'inaccessible-by-default' is in effect. */
1808 xfered_total
+= region_len
;
1812 LONGEST to_read
= min (len
- xfered_total
, region_len
);
1813 gdb_byte
*buffer
= (gdb_byte
*) xmalloc (to_read
* unit_size
);
1815 LONGEST xfered_partial
=
1816 target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1817 (gdb_byte
*) buffer
,
1818 offset
+ xfered_total
, to_read
);
1819 /* Call an observer, notifying them of the xfer progress? */
1820 if (xfered_partial
<= 0)
1822 /* Got an error reading full chunk. See if maybe we can read
1825 read_whatever_is_readable (ops
, offset
+ xfered_total
, unit_size
,
1826 offset
+ xfered_total
+ to_read
, &result
);
1827 xfered_total
+= to_read
;
1831 struct memory_read_result r
;
1833 r
.begin
= offset
+ xfered_total
;
1834 r
.end
= r
.begin
+ xfered_partial
;
1835 VEC_safe_push (memory_read_result_s
, result
, &r
);
1836 xfered_total
+= xfered_partial
;
1845 /* An alternative to target_write with progress callbacks. */
1848 target_write_with_progress (struct target_ops
*ops
,
1849 enum target_object object
,
1850 const char *annex
, const gdb_byte
*buf
,
1851 ULONGEST offset
, LONGEST len
,
1852 void (*progress
) (ULONGEST
, void *), void *baton
)
1854 LONGEST xfered_total
= 0;
1857 /* If we are writing to a memory object, find the length of an addressable
1858 unit for that architecture. */
1859 if (object
== TARGET_OBJECT_MEMORY
1860 || object
== TARGET_OBJECT_STACK_MEMORY
1861 || object
== TARGET_OBJECT_CODE_MEMORY
1862 || object
== TARGET_OBJECT_RAW_MEMORY
)
1863 unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
1865 /* Give the progress callback a chance to set up. */
1867 (*progress
) (0, baton
);
1869 while (xfered_total
< len
)
1871 ULONGEST xfered_partial
;
1872 enum target_xfer_status status
;
1874 status
= target_write_partial (ops
, object
, annex
,
1875 buf
+ xfered_total
* unit_size
,
1876 offset
+ xfered_total
, len
- xfered_total
,
1879 if (status
!= TARGET_XFER_OK
)
1880 return status
== TARGET_XFER_EOF
? xfered_total
: TARGET_XFER_E_IO
;
1883 (*progress
) (xfered_partial
, baton
);
1885 xfered_total
+= xfered_partial
;
1891 /* For docs on target_write see target.h. */
1894 target_write (struct target_ops
*ops
,
1895 enum target_object object
,
1896 const char *annex
, const gdb_byte
*buf
,
1897 ULONGEST offset
, LONGEST len
)
1899 return target_write_with_progress (ops
, object
, annex
, buf
, offset
, len
,
1903 /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return
1904 the size of the transferred data. PADDING additional bytes are
1905 available in *BUF_P. This is a helper function for
1906 target_read_alloc; see the declaration of that function for more
1910 target_read_alloc_1 (struct target_ops
*ops
, enum target_object object
,
1911 const char *annex
, gdb_byte
**buf_p
, int padding
)
1913 size_t buf_alloc
, buf_pos
;
1916 /* This function does not have a length parameter; it reads the
1917 entire OBJECT). Also, it doesn't support objects fetched partly
1918 from one target and partly from another (in a different stratum,
1919 e.g. a core file and an executable). Both reasons make it
1920 unsuitable for reading memory. */
1921 gdb_assert (object
!= TARGET_OBJECT_MEMORY
);
1923 /* Start by reading up to 4K at a time. The target will throttle
1924 this number down if necessary. */
1926 buf
= xmalloc (buf_alloc
);
1930 ULONGEST xfered_len
;
1931 enum target_xfer_status status
;
1933 status
= target_read_partial (ops
, object
, annex
, &buf
[buf_pos
],
1934 buf_pos
, buf_alloc
- buf_pos
- padding
,
1937 if (status
== TARGET_XFER_EOF
)
1939 /* Read all there was. */
1946 else if (status
!= TARGET_XFER_OK
)
1948 /* An error occurred. */
1950 return TARGET_XFER_E_IO
;
1953 buf_pos
+= xfered_len
;
1955 /* If the buffer is filling up, expand it. */
1956 if (buf_alloc
< buf_pos
* 2)
1959 buf
= xrealloc (buf
, buf_alloc
);
1966 /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return
1967 the size of the transferred data. See the declaration in "target.h"
1968 function for more information about the return value. */
1971 target_read_alloc (struct target_ops
*ops
, enum target_object object
,
1972 const char *annex
, gdb_byte
**buf_p
)
1974 return target_read_alloc_1 (ops
, object
, annex
, buf_p
, 0);
1977 /* Read OBJECT/ANNEX using OPS. The result is NUL-terminated and
1978 returned as a string, allocated using xmalloc. If an error occurs
1979 or the transfer is unsupported, NULL is returned. Empty objects
1980 are returned as allocated but empty strings. A warning is issued
1981 if the result contains any embedded NUL bytes. */
1984 target_read_stralloc (struct target_ops
*ops
, enum target_object object
,
1989 LONGEST i
, transferred
;
1991 transferred
= target_read_alloc_1 (ops
, object
, annex
, &buffer
, 1);
1992 bufstr
= (char *) buffer
;
1994 if (transferred
< 0)
1997 if (transferred
== 0)
1998 return xstrdup ("");
2000 bufstr
[transferred
] = 0;
2002 /* Check for embedded NUL bytes; but allow trailing NULs. */
2003 for (i
= strlen (bufstr
); i
< transferred
; i
++)
2006 warning (_("target object %d, annex %s, "
2007 "contained unexpected null characters"),
2008 (int) object
, annex
? annex
: "(none)");
2015 /* Memory transfer methods. */
2018 get_target_memory (struct target_ops
*ops
, CORE_ADDR addr
, gdb_byte
*buf
,
2021 /* This method is used to read from an alternate, non-current
2022 target. This read must bypass the overlay support (as symbols
2023 don't match this target), and GDB's internal cache (wrong cache
2024 for this target). */
2025 if (target_read (ops
, TARGET_OBJECT_RAW_MEMORY
, NULL
, buf
, addr
, len
)
2027 memory_error (TARGET_XFER_E_IO
, addr
);
2031 get_target_memory_unsigned (struct target_ops
*ops
, CORE_ADDR addr
,
2032 int len
, enum bfd_endian byte_order
)
2034 gdb_byte buf
[sizeof (ULONGEST
)];
2036 gdb_assert (len
<= sizeof (buf
));
2037 get_target_memory (ops
, addr
, buf
, len
);
2038 return extract_unsigned_integer (buf
, len
, byte_order
);
2044 target_insert_breakpoint (struct gdbarch
*gdbarch
,
2045 struct bp_target_info
*bp_tgt
)
2047 if (!may_insert_breakpoints
)
2049 warning (_("May not insert breakpoints"));
2053 return current_target
.to_insert_breakpoint (¤t_target
,
2060 target_remove_breakpoint (struct gdbarch
*gdbarch
,
2061 struct bp_target_info
*bp_tgt
)
2063 /* This is kind of a weird case to handle, but the permission might
2064 have been changed after breakpoints were inserted - in which case
2065 we should just take the user literally and assume that any
2066 breakpoints should be left in place. */
2067 if (!may_insert_breakpoints
)
2069 warning (_("May not remove breakpoints"));
2073 return current_target
.to_remove_breakpoint (¤t_target
,
2078 target_info (char *args
, int from_tty
)
2080 struct target_ops
*t
;
2081 int has_all_mem
= 0;
2083 if (symfile_objfile
!= NULL
)
2084 printf_unfiltered (_("Symbols from \"%s\".\n"),
2085 objfile_name (symfile_objfile
));
2087 for (t
= target_stack
; t
!= NULL
; t
= t
->beneath
)
2089 if (!(*t
->to_has_memory
) (t
))
2092 if ((int) (t
->to_stratum
) <= (int) dummy_stratum
)
2095 printf_unfiltered (_("\tWhile running this, "
2096 "GDB does not access memory from...\n"));
2097 printf_unfiltered ("%s:\n", t
->to_longname
);
2098 (t
->to_files_info
) (t
);
2099 has_all_mem
= (*t
->to_has_all_memory
) (t
);
2103 /* This function is called before any new inferior is created, e.g.
2104 by running a program, attaching, or connecting to a target.
2105 It cleans up any state from previous invocations which might
2106 change between runs. This is a subset of what target_preopen
2107 resets (things which might change between targets). */
2110 target_pre_inferior (int from_tty
)
2112 /* Clear out solib state. Otherwise the solib state of the previous
2113 inferior might have survived and is entirely wrong for the new
2114 target. This has been observed on GNU/Linux using glibc 2.3. How
2126 Cannot access memory at address 0xdeadbeef
2129 /* In some OSs, the shared library list is the same/global/shared
2130 across inferiors. If code is shared between processes, so are
2131 memory regions and features. */
2132 if (!gdbarch_has_global_solist (target_gdbarch ()))
2134 no_shared_libraries (NULL
, from_tty
);
2136 invalidate_target_mem_regions ();
2138 target_clear_description ();
2141 agent_capability_invalidate ();
2144 /* Callback for iterate_over_inferiors. Gets rid of the given
2148 dispose_inferior (struct inferior
*inf
, void *args
)
2150 struct thread_info
*thread
;
2152 thread
= any_thread_of_process (inf
->pid
);
2155 switch_to_thread (thread
->ptid
);
2157 /* Core inferiors actually should be detached, not killed. */
2158 if (target_has_execution
)
2161 target_detach (NULL
, 0);
2167 /* This is to be called by the open routine before it does
2171 target_preopen (int from_tty
)
2175 if (have_inferiors ())
2178 || !have_live_inferiors ()
2179 || query (_("A program is being debugged already. Kill it? ")))
2180 iterate_over_inferiors (dispose_inferior
, NULL
);
2182 error (_("Program not killed."));
2185 /* Calling target_kill may remove the target from the stack. But if
2186 it doesn't (which seems like a win for UDI), remove it now. */
2187 /* Leave the exec target, though. The user may be switching from a
2188 live process to a core of the same program. */
2189 pop_all_targets_above (file_stratum
);
2191 target_pre_inferior (from_tty
);
2194 /* Detach a target after doing deferred register stores. */
2197 target_detach (const char *args
, int from_tty
)
2199 struct target_ops
* t
;
2201 if (gdbarch_has_global_breakpoints (target_gdbarch ()))
2202 /* Don't remove global breakpoints here. They're removed on
2203 disconnection from the target. */
2206 /* If we're in breakpoints-always-inserted mode, have to remove
2207 them before detaching. */
2208 remove_breakpoints_pid (ptid_get_pid (inferior_ptid
));
2210 prepare_for_detach ();
2212 current_target
.to_detach (¤t_target
, args
, from_tty
);
2216 target_disconnect (const char *args
, int from_tty
)
2218 /* If we're in breakpoints-always-inserted mode or if breakpoints
2219 are global across processes, we have to remove them before
2221 remove_breakpoints ();
2223 current_target
.to_disconnect (¤t_target
, args
, from_tty
);
2227 target_wait (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
2229 return (current_target
.to_wait
) (¤t_target
, ptid
, status
, options
);
2233 target_pid_to_str (ptid_t ptid
)
2235 return (*current_target
.to_pid_to_str
) (¤t_target
, ptid
);
2239 target_thread_name (struct thread_info
*info
)
2241 return current_target
.to_thread_name (¤t_target
, info
);
2245 target_resume (ptid_t ptid
, int step
, enum gdb_signal signal
)
2247 struct target_ops
*t
;
2249 target_dcache_invalidate ();
2251 current_target
.to_resume (¤t_target
, ptid
, step
, signal
);
2253 registers_changed_ptid (ptid
);
2254 /* We only set the internal executing state here. The user/frontend
2255 running state is set at a higher level. */
2256 set_executing (ptid
, 1);
2257 clear_inline_frame_state (ptid
);
2261 target_pass_signals (int numsigs
, unsigned char *pass_signals
)
2263 (*current_target
.to_pass_signals
) (¤t_target
, numsigs
, pass_signals
);
2267 target_program_signals (int numsigs
, unsigned char *program_signals
)
2269 (*current_target
.to_program_signals
) (¤t_target
,
2270 numsigs
, program_signals
);
2274 default_follow_fork (struct target_ops
*self
, int follow_child
,
2277 /* Some target returned a fork event, but did not know how to follow it. */
2278 internal_error (__FILE__
, __LINE__
,
2279 _("could not find a target to follow fork"));
2282 /* Look through the list of possible targets for a target that can
2286 target_follow_fork (int follow_child
, int detach_fork
)
2288 return current_target
.to_follow_fork (¤t_target
,
2289 follow_child
, detach_fork
);
2293 default_mourn_inferior (struct target_ops
*self
)
2295 internal_error (__FILE__
, __LINE__
,
2296 _("could not find a target to follow mourn inferior"));
2300 target_mourn_inferior (void)
2302 current_target
.to_mourn_inferior (¤t_target
);
2304 /* We no longer need to keep handles on any of the object files.
2305 Make sure to release them to avoid unnecessarily locking any
2306 of them while we're not actually debugging. */
2307 bfd_cache_close_all ();
2310 /* Look for a target which can describe architectural features, starting
2311 from TARGET. If we find one, return its description. */
2313 const struct target_desc
*
2314 target_read_description (struct target_ops
*target
)
2316 return target
->to_read_description (target
);
2319 /* This implements a basic search of memory, reading target memory and
2320 performing the search here (as opposed to performing the search in on the
2321 target side with, for example, gdbserver). */
2324 simple_search_memory (struct target_ops
*ops
,
2325 CORE_ADDR start_addr
, ULONGEST search_space_len
,
2326 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2327 CORE_ADDR
*found_addrp
)
2329 /* NOTE: also defined in find.c testcase. */
2330 #define SEARCH_CHUNK_SIZE 16000
2331 const unsigned chunk_size
= SEARCH_CHUNK_SIZE
;
2332 /* Buffer to hold memory contents for searching. */
2333 gdb_byte
*search_buf
;
2334 unsigned search_buf_size
;
2335 struct cleanup
*old_cleanups
;
2337 search_buf_size
= chunk_size
+ pattern_len
- 1;
2339 /* No point in trying to allocate a buffer larger than the search space. */
2340 if (search_space_len
< search_buf_size
)
2341 search_buf_size
= search_space_len
;
2343 search_buf
= malloc (search_buf_size
);
2344 if (search_buf
== NULL
)
2345 error (_("Unable to allocate memory to perform the search."));
2346 old_cleanups
= make_cleanup (free_current_contents
, &search_buf
);
2348 /* Prime the search buffer. */
2350 if (target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2351 search_buf
, start_addr
, search_buf_size
) != search_buf_size
)
2353 warning (_("Unable to access %s bytes of target "
2354 "memory at %s, halting search."),
2355 pulongest (search_buf_size
), hex_string (start_addr
));
2356 do_cleanups (old_cleanups
);
2360 /* Perform the search.
2362 The loop is kept simple by allocating [N + pattern-length - 1] bytes.
2363 When we've scanned N bytes we copy the trailing bytes to the start and
2364 read in another N bytes. */
2366 while (search_space_len
>= pattern_len
)
2368 gdb_byte
*found_ptr
;
2369 unsigned nr_search_bytes
= min (search_space_len
, search_buf_size
);
2371 found_ptr
= memmem (search_buf
, nr_search_bytes
,
2372 pattern
, pattern_len
);
2374 if (found_ptr
!= NULL
)
2376 CORE_ADDR found_addr
= start_addr
+ (found_ptr
- search_buf
);
2378 *found_addrp
= found_addr
;
2379 do_cleanups (old_cleanups
);
2383 /* Not found in this chunk, skip to next chunk. */
2385 /* Don't let search_space_len wrap here, it's unsigned. */
2386 if (search_space_len
>= chunk_size
)
2387 search_space_len
-= chunk_size
;
2389 search_space_len
= 0;
2391 if (search_space_len
>= pattern_len
)
2393 unsigned keep_len
= search_buf_size
- chunk_size
;
2394 CORE_ADDR read_addr
= start_addr
+ chunk_size
+ keep_len
;
2397 /* Copy the trailing part of the previous iteration to the front
2398 of the buffer for the next iteration. */
2399 gdb_assert (keep_len
== pattern_len
- 1);
2400 memcpy (search_buf
, search_buf
+ chunk_size
, keep_len
);
2402 nr_to_read
= min (search_space_len
- keep_len
, chunk_size
);
2404 if (target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2405 search_buf
+ keep_len
, read_addr
,
2406 nr_to_read
) != nr_to_read
)
2408 warning (_("Unable to access %s bytes of target "
2409 "memory at %s, halting search."),
2410 plongest (nr_to_read
),
2411 hex_string (read_addr
));
2412 do_cleanups (old_cleanups
);
2416 start_addr
+= chunk_size
;
2422 do_cleanups (old_cleanups
);
2426 /* Default implementation of memory-searching. */
2429 default_search_memory (struct target_ops
*self
,
2430 CORE_ADDR start_addr
, ULONGEST search_space_len
,
2431 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2432 CORE_ADDR
*found_addrp
)
2434 /* Start over from the top of the target stack. */
2435 return simple_search_memory (current_target
.beneath
,
2436 start_addr
, search_space_len
,
2437 pattern
, pattern_len
, found_addrp
);
2440 /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the
2441 sequence of bytes in PATTERN with length PATTERN_LEN.
2443 The result is 1 if found, 0 if not found, and -1 if there was an error
2444 requiring halting of the search (e.g. memory read error).
2445 If the pattern is found the address is recorded in FOUND_ADDRP. */
2448 target_search_memory (CORE_ADDR start_addr
, ULONGEST search_space_len
,
2449 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2450 CORE_ADDR
*found_addrp
)
2452 return current_target
.to_search_memory (¤t_target
, start_addr
,
2454 pattern
, pattern_len
, found_addrp
);
2457 /* Look through the currently pushed targets. If none of them will
2458 be able to restart the currently running process, issue an error
2462 target_require_runnable (void)
2464 struct target_ops
*t
;
2466 for (t
= target_stack
; t
!= NULL
; t
= t
->beneath
)
2468 /* If this target knows how to create a new program, then
2469 assume we will still be able to after killing the current
2470 one. Either killing and mourning will not pop T, or else
2471 find_default_run_target will find it again. */
2472 if (t
->to_create_inferior
!= NULL
)
2475 /* Do not worry about targets at certain strata that can not
2476 create inferiors. Assume they will be pushed again if
2477 necessary, and continue to the process_stratum. */
2478 if (t
->to_stratum
== thread_stratum
2479 || t
->to_stratum
== record_stratum
2480 || t
->to_stratum
== arch_stratum
)
2483 error (_("The \"%s\" target does not support \"run\". "
2484 "Try \"help target\" or \"continue\"."),
2488 /* This function is only called if the target is running. In that
2489 case there should have been a process_stratum target and it
2490 should either know how to create inferiors, or not... */
2491 internal_error (__FILE__
, __LINE__
, _("No targets found"));
2494 /* Whether GDB is allowed to fall back to the default run target for
2495 "run", "attach", etc. when no target is connected yet. */
2496 static int auto_connect_native_target
= 1;
2499 show_auto_connect_native_target (struct ui_file
*file
, int from_tty
,
2500 struct cmd_list_element
*c
, const char *value
)
2502 fprintf_filtered (file
,
2503 _("Whether GDB may automatically connect to the "
2504 "native target is %s.\n"),
2508 /* Look through the list of possible targets for a target that can
2509 execute a run or attach command without any other data. This is
2510 used to locate the default process stratum.
2512 If DO_MESG is not NULL, the result is always valid (error() is
2513 called for errors); else, return NULL on error. */
2515 static struct target_ops
*
2516 find_default_run_target (char *do_mesg
)
2518 struct target_ops
*runable
= NULL
;
2520 if (auto_connect_native_target
)
2522 struct target_ops
*t
;
2526 for (i
= 0; VEC_iterate (target_ops_p
, target_structs
, i
, t
); ++i
)
2528 if (t
->to_can_run
!= delegate_can_run
&& target_can_run (t
))
2539 if (runable
== NULL
)
2542 error (_("Don't know how to %s. Try \"help target\"."), do_mesg
);
2553 find_attach_target (void)
2555 struct target_ops
*t
;
2557 /* If a target on the current stack can attach, use it. */
2558 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2560 if (t
->to_attach
!= NULL
)
2564 /* Otherwise, use the default run target for attaching. */
2566 t
= find_default_run_target ("attach");
2574 find_run_target (void)
2576 struct target_ops
*t
;
2578 /* If a target on the current stack can attach, use it. */
2579 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2581 if (t
->to_create_inferior
!= NULL
)
2585 /* Otherwise, use the default run target. */
2587 t
= find_default_run_target ("run");
2592 /* Implement the "info proc" command. */
2595 target_info_proc (const char *args
, enum info_proc_what what
)
2597 struct target_ops
*t
;
2599 /* If we're already connected to something that can get us OS
2600 related data, use it. Otherwise, try using the native
2602 if (current_target
.to_stratum
>= process_stratum
)
2603 t
= current_target
.beneath
;
2605 t
= find_default_run_target (NULL
);
2607 for (; t
!= NULL
; t
= t
->beneath
)
2609 if (t
->to_info_proc
!= NULL
)
2611 t
->to_info_proc (t
, args
, what
);
2614 fprintf_unfiltered (gdb_stdlog
,
2615 "target_info_proc (\"%s\", %d)\n", args
, what
);
2625 find_default_supports_disable_randomization (struct target_ops
*self
)
2627 struct target_ops
*t
;
2629 t
= find_default_run_target (NULL
);
2630 if (t
&& t
->to_supports_disable_randomization
)
2631 return (t
->to_supports_disable_randomization
) (t
);
2636 target_supports_disable_randomization (void)
2638 struct target_ops
*t
;
2640 for (t
= ¤t_target
; t
!= NULL
; t
= t
->beneath
)
2641 if (t
->to_supports_disable_randomization
)
2642 return t
->to_supports_disable_randomization (t
);
2648 target_get_osdata (const char *type
)
2650 struct target_ops
*t
;
2652 /* If we're already connected to something that can get us OS
2653 related data, use it. Otherwise, try using the native
2655 if (current_target
.to_stratum
>= process_stratum
)
2656 t
= current_target
.beneath
;
2658 t
= find_default_run_target ("get OS data");
2663 return target_read_stralloc (t
, TARGET_OBJECT_OSDATA
, type
);
2666 static struct address_space
*
2667 default_thread_address_space (struct target_ops
*self
, ptid_t ptid
)
2669 struct inferior
*inf
;
2671 /* Fall-back to the "main" address space of the inferior. */
2672 inf
= find_inferior_ptid (ptid
);
2674 if (inf
== NULL
|| inf
->aspace
== NULL
)
2675 internal_error (__FILE__
, __LINE__
,
2676 _("Can't determine the current "
2677 "address space of thread %s\n"),
2678 target_pid_to_str (ptid
));
2683 /* Determine the current address space of thread PTID. */
2685 struct address_space
*
2686 target_thread_address_space (ptid_t ptid
)
2688 struct address_space
*aspace
;
2690 aspace
= current_target
.to_thread_address_space (¤t_target
, ptid
);
2691 gdb_assert (aspace
!= NULL
);
2697 /* Target file operations. */
2699 static struct target_ops
*
2700 default_fileio_target (void)
2702 /* If we're already connected to something that can perform
2703 file I/O, use it. Otherwise, try using the native target. */
2704 if (current_target
.to_stratum
>= process_stratum
)
2705 return current_target
.beneath
;
2707 return find_default_run_target ("file I/O");
2710 /* File handle for target file operations. */
2714 /* The target on which this file is open. */
2715 struct target_ops
*t
;
2717 /* The file descriptor on the target. */
2721 DEF_VEC_O (fileio_fh_t
);
2723 /* Vector of currently open file handles. The value returned by
2724 target_fileio_open and passed as the FD argument to other
2725 target_fileio_* functions is an index into this vector. This
2726 vector's entries are never freed; instead, files are marked as
2727 closed, and the handle becomes available for reuse. */
2728 static VEC (fileio_fh_t
) *fileio_fhandles
;
2730 /* Macro to check whether a fileio_fh_t represents a closed file. */
2731 #define is_closed_fileio_fh(fd) ((fd) < 0)
2733 /* Index into fileio_fhandles of the lowest handle that might be
2734 closed. This permits handle reuse without searching the whole
2735 list each time a new file is opened. */
2736 static int lowest_closed_fd
;
2738 /* Acquire a target fileio file descriptor. */
2741 acquire_fileio_fd (struct target_ops
*t
, int fd
)
2743 fileio_fh_t
*fh
, buf
;
2745 gdb_assert (!is_closed_fileio_fh (fd
));
2747 /* Search for closed handles to reuse. */
2749 VEC_iterate (fileio_fh_t
, fileio_fhandles
,
2750 lowest_closed_fd
, fh
);
2752 if (is_closed_fileio_fh (fh
->fd
))
2755 /* Push a new handle if no closed handles were found. */
2756 if (lowest_closed_fd
== VEC_length (fileio_fh_t
, fileio_fhandles
))
2757 fh
= VEC_safe_push (fileio_fh_t
, fileio_fhandles
, NULL
);
2759 /* Fill in the handle. */
2763 /* Return its index, and start the next lookup at
2765 return lowest_closed_fd
++;
2768 /* Release a target fileio file descriptor. */
2771 release_fileio_fd (int fd
, fileio_fh_t
*fh
)
2774 lowest_closed_fd
= min (lowest_closed_fd
, fd
);
2777 /* Return a pointer to the fileio_fhandle_t corresponding to FD. */
2779 #define fileio_fd_to_fh(fd) \
2780 VEC_index (fileio_fh_t, fileio_fhandles, (fd))
2785 target_fileio_open (struct inferior
*inf
, const char *filename
,
2786 int flags
, int mode
, int *target_errno
)
2788 struct target_ops
*t
;
2790 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
2792 if (t
->to_fileio_open
!= NULL
)
2794 int fd
= t
->to_fileio_open (t
, inf
, filename
, flags
, mode
,
2800 fd
= acquire_fileio_fd (t
, fd
);
2803 fprintf_unfiltered (gdb_stdlog
,
2804 "target_fileio_open (%d,%s,0x%x,0%o)"
2806 inf
== NULL
? 0 : inf
->num
,
2807 filename
, flags
, mode
,
2808 fd
, fd
!= -1 ? 0 : *target_errno
);
2813 *target_errno
= FILEIO_ENOSYS
;
2820 target_fileio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
2821 ULONGEST offset
, int *target_errno
)
2823 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
2826 if (is_closed_fileio_fh (fh
->fd
))
2827 *target_errno
= EBADF
;
2829 ret
= fh
->t
->to_fileio_pwrite (fh
->t
, fh
->fd
, write_buf
,
2830 len
, offset
, target_errno
);
2833 fprintf_unfiltered (gdb_stdlog
,
2834 "target_fileio_pwrite (%d,...,%d,%s) "
2836 fd
, len
, pulongest (offset
),
2837 ret
, ret
!= -1 ? 0 : *target_errno
);
2844 target_fileio_pread (int fd
, gdb_byte
*read_buf
, int len
,
2845 ULONGEST offset
, int *target_errno
)
2847 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
2850 if (is_closed_fileio_fh (fh
->fd
))
2851 *target_errno
= EBADF
;
2853 ret
= fh
->t
->to_fileio_pread (fh
->t
, fh
->fd
, read_buf
,
2854 len
, offset
, target_errno
);
2857 fprintf_unfiltered (gdb_stdlog
,
2858 "target_fileio_pread (%d,...,%d,%s) "
2860 fd
, len
, pulongest (offset
),
2861 ret
, ret
!= -1 ? 0 : *target_errno
);
2868 target_fileio_fstat (int fd
, struct stat
*sb
, int *target_errno
)
2870 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
2873 if (is_closed_fileio_fh (fh
->fd
))
2874 *target_errno
= EBADF
;
2876 ret
= fh
->t
->to_fileio_fstat (fh
->t
, fh
->fd
, sb
, target_errno
);
2879 fprintf_unfiltered (gdb_stdlog
,
2880 "target_fileio_fstat (%d) = %d (%d)\n",
2881 fd
, ret
, ret
!= -1 ? 0 : *target_errno
);
2888 target_fileio_close (int fd
, int *target_errno
)
2890 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
2893 if (is_closed_fileio_fh (fh
->fd
))
2894 *target_errno
= EBADF
;
2897 ret
= fh
->t
->to_fileio_close (fh
->t
, fh
->fd
, target_errno
);
2898 release_fileio_fd (fd
, fh
);
2902 fprintf_unfiltered (gdb_stdlog
,
2903 "target_fileio_close (%d) = %d (%d)\n",
2904 fd
, ret
, ret
!= -1 ? 0 : *target_errno
);
2911 target_fileio_unlink (struct inferior
*inf
, const char *filename
,
2914 struct target_ops
*t
;
2916 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
2918 if (t
->to_fileio_unlink
!= NULL
)
2920 int ret
= t
->to_fileio_unlink (t
, inf
, filename
,
2924 fprintf_unfiltered (gdb_stdlog
,
2925 "target_fileio_unlink (%d,%s)"
2927 inf
== NULL
? 0 : inf
->num
, filename
,
2928 ret
, ret
!= -1 ? 0 : *target_errno
);
2933 *target_errno
= FILEIO_ENOSYS
;
2940 target_fileio_readlink (struct inferior
*inf
, const char *filename
,
2943 struct target_ops
*t
;
2945 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
2947 if (t
->to_fileio_readlink
!= NULL
)
2949 char *ret
= t
->to_fileio_readlink (t
, inf
, filename
,
2953 fprintf_unfiltered (gdb_stdlog
,
2954 "target_fileio_readlink (%d,%s)"
2956 inf
== NULL
? 0 : inf
->num
,
2957 filename
, ret
? ret
: "(nil)",
2958 ret
? 0 : *target_errno
);
2963 *target_errno
= FILEIO_ENOSYS
;
2968 target_fileio_close_cleanup (void *opaque
)
2970 int fd
= *(int *) opaque
;
2973 target_fileio_close (fd
, &target_errno
);
2976 /* Read target file FILENAME, in the filesystem as seen by INF. If
2977 INF is NULL, use the filesystem seen by the debugger (GDB or, for
2978 remote targets, the remote stub). Store the result in *BUF_P and
2979 return the size of the transferred data. PADDING additional bytes
2980 are available in *BUF_P. This is a helper function for
2981 target_fileio_read_alloc; see the declaration of that function for
2982 more information. */
2985 target_fileio_read_alloc_1 (struct inferior
*inf
, const char *filename
,
2986 gdb_byte
**buf_p
, int padding
)
2988 struct cleanup
*close_cleanup
;
2989 size_t buf_alloc
, buf_pos
;
2995 fd
= target_fileio_open (inf
, filename
, FILEIO_O_RDONLY
, 0700,
3000 close_cleanup
= make_cleanup (target_fileio_close_cleanup
, &fd
);
3002 /* Start by reading up to 4K at a time. The target will throttle
3003 this number down if necessary. */
3005 buf
= xmalloc (buf_alloc
);
3009 n
= target_fileio_pread (fd
, &buf
[buf_pos
],
3010 buf_alloc
- buf_pos
- padding
, buf_pos
,
3014 /* An error occurred. */
3015 do_cleanups (close_cleanup
);
3021 /* Read all there was. */
3022 do_cleanups (close_cleanup
);
3032 /* If the buffer is filling up, expand it. */
3033 if (buf_alloc
< buf_pos
* 2)
3036 buf
= xrealloc (buf
, buf_alloc
);
3046 target_fileio_read_alloc (struct inferior
*inf
, const char *filename
,
3049 return target_fileio_read_alloc_1 (inf
, filename
, buf_p
, 0);
3055 target_fileio_read_stralloc (struct inferior
*inf
, const char *filename
)
3059 LONGEST i
, transferred
;
3061 transferred
= target_fileio_read_alloc_1 (inf
, filename
, &buffer
, 1);
3062 bufstr
= (char *) buffer
;
3064 if (transferred
< 0)
3067 if (transferred
== 0)
3068 return xstrdup ("");
3070 bufstr
[transferred
] = 0;
3072 /* Check for embedded NUL bytes; but allow trailing NULs. */
3073 for (i
= strlen (bufstr
); i
< transferred
; i
++)
3076 warning (_("target file %s "
3077 "contained unexpected null characters"),
3087 default_region_ok_for_hw_watchpoint (struct target_ops
*self
,
3088 CORE_ADDR addr
, int len
)
3090 return (len
<= gdbarch_ptr_bit (target_gdbarch ()) / TARGET_CHAR_BIT
);
3094 default_watchpoint_addr_within_range (struct target_ops
*target
,
3096 CORE_ADDR start
, int length
)
3098 return addr
>= start
&& addr
< start
+ length
;
3101 static struct gdbarch
*
3102 default_thread_architecture (struct target_ops
*ops
, ptid_t ptid
)
3104 return target_gdbarch ();
3108 return_zero (struct target_ops
*ignore
)
3114 return_zero_has_execution (struct target_ops
*ignore
, ptid_t ignore2
)
3120 * Find the next target down the stack from the specified target.
3124 find_target_beneath (struct target_ops
*t
)
3132 find_target_at (enum strata stratum
)
3134 struct target_ops
*t
;
3136 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3137 if (t
->to_stratum
== stratum
)
3144 /* The inferior process has died. Long live the inferior! */
3147 generic_mourn_inferior (void)
3151 ptid
= inferior_ptid
;
3152 inferior_ptid
= null_ptid
;
3154 /* Mark breakpoints uninserted in case something tries to delete a
3155 breakpoint while we delete the inferior's threads (which would
3156 fail, since the inferior is long gone). */
3157 mark_breakpoints_out ();
3159 if (!ptid_equal (ptid
, null_ptid
))
3161 int pid
= ptid_get_pid (ptid
);
3162 exit_inferior (pid
);
3165 /* Note this wipes step-resume breakpoints, so needs to be done
3166 after exit_inferior, which ends up referencing the step-resume
3167 breakpoints through clear_thread_inferior_resources. */
3168 breakpoint_init_inferior (inf_exited
);
3170 registers_changed ();
3172 reopen_exec_file ();
3173 reinit_frame_cache ();
3175 if (deprecated_detach_hook
)
3176 deprecated_detach_hook ();
3179 /* Convert a normal process ID to a string. Returns the string in a
3183 normal_pid_to_str (ptid_t ptid
)
3185 static char buf
[32];
3187 xsnprintf (buf
, sizeof buf
, "process %d", ptid_get_pid (ptid
));
3192 default_pid_to_str (struct target_ops
*ops
, ptid_t ptid
)
3194 return normal_pid_to_str (ptid
);
3197 /* Error-catcher for target_find_memory_regions. */
3199 dummy_find_memory_regions (struct target_ops
*self
,
3200 find_memory_region_ftype ignore1
, void *ignore2
)
3202 error (_("Command not implemented for this target."));
3206 /* Error-catcher for target_make_corefile_notes. */
3208 dummy_make_corefile_notes (struct target_ops
*self
,
3209 bfd
*ignore1
, int *ignore2
)
3211 error (_("Command not implemented for this target."));
3215 /* Set up the handful of non-empty slots needed by the dummy target
3219 init_dummy_target (void)
3221 dummy_target
.to_shortname
= "None";
3222 dummy_target
.to_longname
= "None";
3223 dummy_target
.to_doc
= "";
3224 dummy_target
.to_supports_disable_randomization
3225 = find_default_supports_disable_randomization
;
3226 dummy_target
.to_stratum
= dummy_stratum
;
3227 dummy_target
.to_has_all_memory
= return_zero
;
3228 dummy_target
.to_has_memory
= return_zero
;
3229 dummy_target
.to_has_stack
= return_zero
;
3230 dummy_target
.to_has_registers
= return_zero
;
3231 dummy_target
.to_has_execution
= return_zero_has_execution
;
3232 dummy_target
.to_magic
= OPS_MAGIC
;
3234 install_dummy_methods (&dummy_target
);
3239 target_close (struct target_ops
*targ
)
3241 gdb_assert (!target_is_pushed (targ
));
3243 if (targ
->to_xclose
!= NULL
)
3244 targ
->to_xclose (targ
);
3245 else if (targ
->to_close
!= NULL
)
3246 targ
->to_close (targ
);
3249 fprintf_unfiltered (gdb_stdlog
, "target_close ()\n");
3253 target_thread_alive (ptid_t ptid
)
3255 return current_target
.to_thread_alive (¤t_target
, ptid
);
3259 target_update_thread_list (void)
3261 current_target
.to_update_thread_list (¤t_target
);
3265 target_stop (ptid_t ptid
)
3269 warning (_("May not interrupt or stop the target, ignoring attempt"));
3273 (*current_target
.to_stop
) (¤t_target
, ptid
);
3276 /* See target/target.h. */
3279 target_stop_and_wait (ptid_t ptid
)
3281 struct target_waitstatus status
;
3282 int was_non_stop
= non_stop
;
3287 memset (&status
, 0, sizeof (status
));
3288 target_wait (ptid
, &status
, 0);
3290 non_stop
= was_non_stop
;
3293 /* See target/target.h. */
3296 target_continue_no_signal (ptid_t ptid
)
3298 target_resume (ptid
, 0, GDB_SIGNAL_0
);
3301 /* Concatenate ELEM to LIST, a comma separate list, and return the
3302 result. The LIST incoming argument is released. */
3305 str_comma_list_concat_elem (char *list
, const char *elem
)
3308 return xstrdup (elem
);
3310 return reconcat (list
, list
, ", ", elem
, (char *) NULL
);
3313 /* Helper for target_options_to_string. If OPT is present in
3314 TARGET_OPTIONS, append the OPT_STR (string version of OPT) in RET.
3315 Returns the new resulting string. OPT is removed from
3319 do_option (int *target_options
, char *ret
,
3320 int opt
, char *opt_str
)
3322 if ((*target_options
& opt
) != 0)
3324 ret
= str_comma_list_concat_elem (ret
, opt_str
);
3325 *target_options
&= ~opt
;
3332 target_options_to_string (int target_options
)
3336 #define DO_TARG_OPTION(OPT) \
3337 ret = do_option (&target_options, ret, OPT, #OPT)
3339 DO_TARG_OPTION (TARGET_WNOHANG
);
3341 if (target_options
!= 0)
3342 ret
= str_comma_list_concat_elem (ret
, "unknown???");
3350 debug_print_register (const char * func
,
3351 struct regcache
*regcache
, int regno
)
3353 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
3355 fprintf_unfiltered (gdb_stdlog
, "%s ", func
);
3356 if (regno
>= 0 && regno
< gdbarch_num_regs (gdbarch
)
3357 && gdbarch_register_name (gdbarch
, regno
) != NULL
3358 && gdbarch_register_name (gdbarch
, regno
)[0] != '\0')
3359 fprintf_unfiltered (gdb_stdlog
, "(%s)",
3360 gdbarch_register_name (gdbarch
, regno
));
3362 fprintf_unfiltered (gdb_stdlog
, "(%d)", regno
);
3363 if (regno
>= 0 && regno
< gdbarch_num_regs (gdbarch
))
3365 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
3366 int i
, size
= register_size (gdbarch
, regno
);
3367 gdb_byte buf
[MAX_REGISTER_SIZE
];
3369 regcache_raw_collect (regcache
, regno
, buf
);
3370 fprintf_unfiltered (gdb_stdlog
, " = ");
3371 for (i
= 0; i
< size
; i
++)
3373 fprintf_unfiltered (gdb_stdlog
, "%02x", buf
[i
]);
3375 if (size
<= sizeof (LONGEST
))
3377 ULONGEST val
= extract_unsigned_integer (buf
, size
, byte_order
);
3379 fprintf_unfiltered (gdb_stdlog
, " %s %s",
3380 core_addr_to_string_nz (val
), plongest (val
));
3383 fprintf_unfiltered (gdb_stdlog
, "\n");
3387 target_fetch_registers (struct regcache
*regcache
, int regno
)
3389 current_target
.to_fetch_registers (¤t_target
, regcache
, regno
);
3391 debug_print_register ("target_fetch_registers", regcache
, regno
);
3395 target_store_registers (struct regcache
*regcache
, int regno
)
3397 struct target_ops
*t
;
3399 if (!may_write_registers
)
3400 error (_("Writing to registers is not allowed (regno %d)"), regno
);
3402 current_target
.to_store_registers (¤t_target
, regcache
, regno
);
3405 debug_print_register ("target_store_registers", regcache
, regno
);
3410 target_core_of_thread (ptid_t ptid
)
3412 return current_target
.to_core_of_thread (¤t_target
, ptid
);
3416 simple_verify_memory (struct target_ops
*ops
,
3417 const gdb_byte
*data
, CORE_ADDR lma
, ULONGEST size
)
3419 LONGEST total_xfered
= 0;
3421 while (total_xfered
< size
)
3423 ULONGEST xfered_len
;
3424 enum target_xfer_status status
;
3426 ULONGEST howmuch
= min (sizeof (buf
), size
- total_xfered
);
3428 status
= target_xfer_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
3429 buf
, NULL
, lma
+ total_xfered
, howmuch
,
3431 if (status
== TARGET_XFER_OK
3432 && memcmp (data
+ total_xfered
, buf
, xfered_len
) == 0)
3434 total_xfered
+= xfered_len
;
3443 /* Default implementation of memory verification. */
3446 default_verify_memory (struct target_ops
*self
,
3447 const gdb_byte
*data
, CORE_ADDR memaddr
, ULONGEST size
)
3449 /* Start over from the top of the target stack. */
3450 return simple_verify_memory (current_target
.beneath
,
3451 data
, memaddr
, size
);
3455 target_verify_memory (const gdb_byte
*data
, CORE_ADDR memaddr
, ULONGEST size
)
3457 return current_target
.to_verify_memory (¤t_target
,
3458 data
, memaddr
, size
);
3461 /* The documentation for this function is in its prototype declaration in
3465 target_insert_mask_watchpoint (CORE_ADDR addr
, CORE_ADDR mask
, int rw
)
3467 return current_target
.to_insert_mask_watchpoint (¤t_target
,
3471 /* The documentation for this function is in its prototype declaration in
3475 target_remove_mask_watchpoint (CORE_ADDR addr
, CORE_ADDR mask
, int rw
)
3477 return current_target
.to_remove_mask_watchpoint (¤t_target
,
3481 /* The documentation for this function is in its prototype declaration
3485 target_masked_watch_num_registers (CORE_ADDR addr
, CORE_ADDR mask
)
3487 return current_target
.to_masked_watch_num_registers (¤t_target
,
3491 /* The documentation for this function is in its prototype declaration
3495 target_ranged_break_num_registers (void)
3497 return current_target
.to_ranged_break_num_registers (¤t_target
);
3503 target_supports_btrace (enum btrace_format format
)
3505 return current_target
.to_supports_btrace (¤t_target
, format
);
3510 struct btrace_target_info
*
3511 target_enable_btrace (ptid_t ptid
, const struct btrace_config
*conf
)
3513 return current_target
.to_enable_btrace (¤t_target
, ptid
, conf
);
3519 target_disable_btrace (struct btrace_target_info
*btinfo
)
3521 current_target
.to_disable_btrace (¤t_target
, btinfo
);
3527 target_teardown_btrace (struct btrace_target_info
*btinfo
)
3529 current_target
.to_teardown_btrace (¤t_target
, btinfo
);
3535 target_read_btrace (struct btrace_data
*btrace
,
3536 struct btrace_target_info
*btinfo
,
3537 enum btrace_read_type type
)
3539 return current_target
.to_read_btrace (¤t_target
, btrace
, btinfo
, type
);
3544 const struct btrace_config
*
3545 target_btrace_conf (const struct btrace_target_info
*btinfo
)
3547 return current_target
.to_btrace_conf (¤t_target
, btinfo
);
3553 target_stop_recording (void)
3555 current_target
.to_stop_recording (¤t_target
);
3561 target_save_record (const char *filename
)
3563 current_target
.to_save_record (¤t_target
, filename
);
3569 target_supports_delete_record (void)
3571 struct target_ops
*t
;
3573 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3574 if (t
->to_delete_record
!= delegate_delete_record
3575 && t
->to_delete_record
!= tdefault_delete_record
)
3584 target_delete_record (void)
3586 current_target
.to_delete_record (¤t_target
);
3592 target_record_is_replaying (void)
3594 return current_target
.to_record_is_replaying (¤t_target
);
3600 target_goto_record_begin (void)
3602 current_target
.to_goto_record_begin (¤t_target
);
3608 target_goto_record_end (void)
3610 current_target
.to_goto_record_end (¤t_target
);
3616 target_goto_record (ULONGEST insn
)
3618 current_target
.to_goto_record (¤t_target
, insn
);
3624 target_insn_history (int size
, int flags
)
3626 current_target
.to_insn_history (¤t_target
, size
, flags
);
3632 target_insn_history_from (ULONGEST from
, int size
, int flags
)
3634 current_target
.to_insn_history_from (¤t_target
, from
, size
, flags
);
3640 target_insn_history_range (ULONGEST begin
, ULONGEST end
, int flags
)
3642 current_target
.to_insn_history_range (¤t_target
, begin
, end
, flags
);
3648 target_call_history (int size
, int flags
)
3650 current_target
.to_call_history (¤t_target
, size
, flags
);
3656 target_call_history_from (ULONGEST begin
, int size
, int flags
)
3658 current_target
.to_call_history_from (¤t_target
, begin
, size
, flags
);
3664 target_call_history_range (ULONGEST begin
, ULONGEST end
, int flags
)
3666 current_target
.to_call_history_range (¤t_target
, begin
, end
, flags
);
3671 const struct frame_unwind
*
3672 target_get_unwinder (void)
3674 return current_target
.to_get_unwinder (¤t_target
);
3679 const struct frame_unwind
*
3680 target_get_tailcall_unwinder (void)
3682 return current_target
.to_get_tailcall_unwinder (¤t_target
);
3688 target_prepare_to_generate_core (void)
3690 current_target
.to_prepare_to_generate_core (¤t_target
);
3696 target_done_generating_core (void)
3698 current_target
.to_done_generating_core (¤t_target
);
3702 setup_target_debug (void)
3704 memcpy (&debug_target
, ¤t_target
, sizeof debug_target
);
3706 init_debug_target (¤t_target
);
3710 static char targ_desc
[] =
3711 "Names of targets and files being debugged.\nShows the entire \
3712 stack of targets currently in use (including the exec-file,\n\
3713 core-file, and process, if any), as well as the symbol file name.";
3716 default_rcmd (struct target_ops
*self
, const char *command
,
3717 struct ui_file
*output
)
3719 error (_("\"monitor\" command not supported by this target."));
3723 do_monitor_command (char *cmd
,
3726 target_rcmd (cmd
, gdb_stdtarg
);
3729 /* Print the name of each layers of our target stack. */
3732 maintenance_print_target_stack (char *cmd
, int from_tty
)
3734 struct target_ops
*t
;
3736 printf_filtered (_("The current target stack is:\n"));
3738 for (t
= target_stack
; t
!= NULL
; t
= t
->beneath
)
3740 printf_filtered (" - %s (%s)\n", t
->to_shortname
, t
->to_longname
);
3744 /* Controls if targets can report that they can/are async. This is
3745 just for maintainers to use when debugging gdb. */
3746 int target_async_permitted
= 1;
3748 /* The set command writes to this variable. If the inferior is
3749 executing, target_async_permitted is *not* updated. */
3750 static int target_async_permitted_1
= 1;
3753 maint_set_target_async_command (char *args
, int from_tty
,
3754 struct cmd_list_element
*c
)
3756 if (have_live_inferiors ())
3758 target_async_permitted_1
= target_async_permitted
;
3759 error (_("Cannot change this setting while the inferior is running."));
3762 target_async_permitted
= target_async_permitted_1
;
3766 maint_show_target_async_command (struct ui_file
*file
, int from_tty
,
3767 struct cmd_list_element
*c
,
3770 fprintf_filtered (file
,
3771 _("Controlling the inferior in "
3772 "asynchronous mode is %s.\n"), value
);
3775 /* Temporary copies of permission settings. */
3777 static int may_write_registers_1
= 1;
3778 static int may_write_memory_1
= 1;
3779 static int may_insert_breakpoints_1
= 1;
3780 static int may_insert_tracepoints_1
= 1;
3781 static int may_insert_fast_tracepoints_1
= 1;
3782 static int may_stop_1
= 1;
3784 /* Make the user-set values match the real values again. */
3787 update_target_permissions (void)
3789 may_write_registers_1
= may_write_registers
;
3790 may_write_memory_1
= may_write_memory
;
3791 may_insert_breakpoints_1
= may_insert_breakpoints
;
3792 may_insert_tracepoints_1
= may_insert_tracepoints
;
3793 may_insert_fast_tracepoints_1
= may_insert_fast_tracepoints
;
3794 may_stop_1
= may_stop
;
3797 /* The one function handles (most of) the permission flags in the same
3801 set_target_permissions (char *args
, int from_tty
,
3802 struct cmd_list_element
*c
)
3804 if (target_has_execution
)
3806 update_target_permissions ();
3807 error (_("Cannot change this setting while the inferior is running."));
3810 /* Make the real values match the user-changed values. */
3811 may_write_registers
= may_write_registers_1
;
3812 may_insert_breakpoints
= may_insert_breakpoints_1
;
3813 may_insert_tracepoints
= may_insert_tracepoints_1
;
3814 may_insert_fast_tracepoints
= may_insert_fast_tracepoints_1
;
3815 may_stop
= may_stop_1
;
3816 update_observer_mode ();
3819 /* Set memory write permission independently of observer mode. */
3822 set_write_memory_permission (char *args
, int from_tty
,
3823 struct cmd_list_element
*c
)
3825 /* Make the real values match the user-changed values. */
3826 may_write_memory
= may_write_memory_1
;
3827 update_observer_mode ();
3832 initialize_targets (void)
3834 init_dummy_target ();
3835 push_target (&dummy_target
);
3837 add_info ("target", target_info
, targ_desc
);
3838 add_info ("files", target_info
, targ_desc
);
3840 add_setshow_zuinteger_cmd ("target", class_maintenance
, &targetdebug
, _("\
3841 Set target debugging."), _("\
3842 Show target debugging."), _("\
3843 When non-zero, target debugging is enabled. Higher numbers are more\n\
3847 &setdebuglist
, &showdebuglist
);
3849 add_setshow_boolean_cmd ("trust-readonly-sections", class_support
,
3850 &trust_readonly
, _("\
3851 Set mode for reading from readonly sections."), _("\
3852 Show mode for reading from readonly sections."), _("\
3853 When this mode is on, memory reads from readonly sections (such as .text)\n\
3854 will be read from the object file instead of from the target. This will\n\
3855 result in significant performance improvement for remote targets."),
3857 show_trust_readonly
,
3858 &setlist
, &showlist
);
3860 add_com ("monitor", class_obscure
, do_monitor_command
,
3861 _("Send a command to the remote monitor (remote targets only)."));
3863 add_cmd ("target-stack", class_maintenance
, maintenance_print_target_stack
,
3864 _("Print the name of each layer of the internal target stack."),
3865 &maintenanceprintlist
);
3867 add_setshow_boolean_cmd ("target-async", no_class
,
3868 &target_async_permitted_1
, _("\
3869 Set whether gdb controls the inferior in asynchronous mode."), _("\
3870 Show whether gdb controls the inferior in asynchronous mode."), _("\
3871 Tells gdb whether to control the inferior in asynchronous mode."),
3872 maint_set_target_async_command
,
3873 maint_show_target_async_command
,
3874 &maintenance_set_cmdlist
,
3875 &maintenance_show_cmdlist
);
3877 add_setshow_boolean_cmd ("may-write-registers", class_support
,
3878 &may_write_registers_1
, _("\
3879 Set permission to write into registers."), _("\
3880 Show permission to write into registers."), _("\
3881 When this permission is on, GDB may write into the target's registers.\n\
3882 Otherwise, any sort of write attempt will result in an error."),
3883 set_target_permissions
, NULL
,
3884 &setlist
, &showlist
);
3886 add_setshow_boolean_cmd ("may-write-memory", class_support
,
3887 &may_write_memory_1
, _("\
3888 Set permission to write into target memory."), _("\
3889 Show permission to write into target memory."), _("\
3890 When this permission is on, GDB may write into the target's memory.\n\
3891 Otherwise, any sort of write attempt will result in an error."),
3892 set_write_memory_permission
, NULL
,
3893 &setlist
, &showlist
);
3895 add_setshow_boolean_cmd ("may-insert-breakpoints", class_support
,
3896 &may_insert_breakpoints_1
, _("\
3897 Set permission to insert breakpoints in the target."), _("\
3898 Show permission to insert breakpoints in the target."), _("\
3899 When this permission is on, GDB may insert breakpoints in the program.\n\
3900 Otherwise, any sort of insertion attempt will result in an error."),
3901 set_target_permissions
, NULL
,
3902 &setlist
, &showlist
);
3904 add_setshow_boolean_cmd ("may-insert-tracepoints", class_support
,
3905 &may_insert_tracepoints_1
, _("\
3906 Set permission to insert tracepoints in the target."), _("\
3907 Show permission to insert tracepoints in the target."), _("\
3908 When this permission is on, GDB may insert tracepoints in the program.\n\
3909 Otherwise, any sort of insertion attempt will result in an error."),
3910 set_target_permissions
, NULL
,
3911 &setlist
, &showlist
);
3913 add_setshow_boolean_cmd ("may-insert-fast-tracepoints", class_support
,
3914 &may_insert_fast_tracepoints_1
, _("\
3915 Set permission to insert fast tracepoints in the target."), _("\
3916 Show permission to insert fast tracepoints in the target."), _("\
3917 When this permission is on, GDB may insert fast tracepoints.\n\
3918 Otherwise, any sort of insertion attempt will result in an error."),
3919 set_target_permissions
, NULL
,
3920 &setlist
, &showlist
);
3922 add_setshow_boolean_cmd ("may-interrupt", class_support
,
3924 Set permission to interrupt or signal the target."), _("\
3925 Show permission to interrupt or signal the target."), _("\
3926 When this permission is on, GDB may interrupt/stop the target's execution.\n\
3927 Otherwise, any attempt to interrupt or stop will be ignored."),
3928 set_target_permissions
, NULL
,
3929 &setlist
, &showlist
);
3931 add_setshow_boolean_cmd ("auto-connect-native-target", class_support
,
3932 &auto_connect_native_target
, _("\
3933 Set whether GDB may automatically connect to the native target."), _("\
3934 Show whether GDB may automatically connect to the native target."), _("\
3935 When on, and GDB is not connected to a target yet, GDB\n\
3936 attempts \"run\" and other commands with the native target."),
3937 NULL
, show_auto_connect_native_target
,
3938 &setlist
, &showlist
);