1 /* Select target systems and architectures at runtime for GDB.
3 Copyright (C) 1990-2014 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/>. */
26 #include "target-dcache.h"
36 #include "gdb_assert.h"
38 #include "exceptions.h"
39 #include "target-descriptions.h"
40 #include "gdbthread.h"
43 #include "inline-frame.h"
44 #include "tracepoint.h"
45 #include "gdb/fileio.h"
49 static void target_info (char *, int);
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
*, 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 void tcomplain (void) ATTRIBUTE_NORETURN
;
82 static int return_zero (struct target_ops
*);
84 static int return_zero_has_execution (struct target_ops
*, ptid_t
);
86 static void target_command (char *, int);
88 static struct target_ops
*find_default_run_target (char *);
90 static struct gdbarch
*default_thread_architecture (struct target_ops
*ops
,
93 static int dummy_find_memory_regions (struct target_ops
*self
,
94 find_memory_region_ftype ignore1
,
97 static char *dummy_make_corefile_notes (struct target_ops
*self
,
98 bfd
*ignore1
, int *ignore2
);
100 static char *default_pid_to_str (struct target_ops
*ops
, ptid_t ptid
);
102 static enum exec_direction_kind default_execution_direction
103 (struct target_ops
*self
);
105 static CORE_ADDR
default_target_decr_pc_after_break (struct target_ops
*ops
,
106 struct gdbarch
*gdbarch
);
108 #include "target-delegates.c"
110 static void init_dummy_target (void);
112 static struct target_ops debug_target
;
114 static void debug_to_open (char *, int);
116 static void debug_to_prepare_to_store (struct target_ops
*self
,
119 static void debug_to_files_info (struct target_ops
*);
121 static int debug_to_insert_breakpoint (struct target_ops
*, struct gdbarch
*,
122 struct bp_target_info
*);
124 static int debug_to_remove_breakpoint (struct target_ops
*, struct gdbarch
*,
125 struct bp_target_info
*);
127 static int debug_to_can_use_hw_breakpoint (struct target_ops
*self
,
130 static int debug_to_insert_hw_breakpoint (struct target_ops
*self
,
132 struct bp_target_info
*);
134 static int debug_to_remove_hw_breakpoint (struct target_ops
*self
,
136 struct bp_target_info
*);
138 static int debug_to_insert_watchpoint (struct target_ops
*self
,
140 struct expression
*);
142 static int debug_to_remove_watchpoint (struct target_ops
*self
,
144 struct expression
*);
146 static int debug_to_stopped_data_address (struct target_ops
*, CORE_ADDR
*);
148 static int debug_to_watchpoint_addr_within_range (struct target_ops
*,
149 CORE_ADDR
, CORE_ADDR
, int);
151 static int debug_to_region_ok_for_hw_watchpoint (struct target_ops
*self
,
154 static int debug_to_can_accel_watchpoint_condition (struct target_ops
*self
,
156 struct expression
*);
158 static void debug_to_terminal_init (struct target_ops
*self
);
160 static void debug_to_terminal_inferior (struct target_ops
*self
);
162 static void debug_to_terminal_ours_for_output (struct target_ops
*self
);
164 static void debug_to_terminal_save_ours (struct target_ops
*self
);
166 static void debug_to_terminal_ours (struct target_ops
*self
);
168 static void debug_to_load (struct target_ops
*self
, char *, int);
170 static int debug_to_can_run (struct target_ops
*self
);
172 static void debug_to_stop (struct target_ops
*self
, ptid_t
);
174 /* Pointer to array of target architecture structures; the size of the
175 array; the current index into the array; the allocated size of the
177 struct target_ops
**target_structs
;
178 unsigned target_struct_size
;
179 unsigned target_struct_allocsize
;
180 #define DEFAULT_ALLOCSIZE 10
182 /* The initial current target, so that there is always a semi-valid
185 static struct target_ops dummy_target
;
187 /* Top of target stack. */
189 static struct target_ops
*target_stack
;
191 /* The target structure we are currently using to talk to a process
192 or file or whatever "inferior" we have. */
194 struct target_ops current_target
;
196 /* Command list for target. */
198 static struct cmd_list_element
*targetlist
= NULL
;
200 /* Nonzero if we should trust readonly sections from the
201 executable when reading memory. */
203 static int trust_readonly
= 0;
205 /* Nonzero if we should show true memory content including
206 memory breakpoint inserted by gdb. */
208 static int show_memory_breakpoints
= 0;
210 /* These globals control whether GDB attempts to perform these
211 operations; they are useful for targets that need to prevent
212 inadvertant disruption, such as in non-stop mode. */
214 int may_write_registers
= 1;
216 int may_write_memory
= 1;
218 int may_insert_breakpoints
= 1;
220 int may_insert_tracepoints
= 1;
222 int may_insert_fast_tracepoints
= 1;
226 /* Non-zero if we want to see trace of target level stuff. */
228 static unsigned int targetdebug
= 0;
230 show_targetdebug (struct ui_file
*file
, int from_tty
,
231 struct cmd_list_element
*c
, const char *value
)
233 fprintf_filtered (file
, _("Target debugging is %s.\n"), value
);
236 static void setup_target_debug (void);
238 /* The user just typed 'target' without the name of a target. */
241 target_command (char *arg
, int from_tty
)
243 fputs_filtered ("Argument required (target name). Try `help target'\n",
247 /* Default target_has_* methods for process_stratum targets. */
250 default_child_has_all_memory (struct target_ops
*ops
)
252 /* If no inferior selected, then we can't read memory here. */
253 if (ptid_equal (inferior_ptid
, null_ptid
))
260 default_child_has_memory (struct target_ops
*ops
)
262 /* If no inferior selected, then we can't read memory here. */
263 if (ptid_equal (inferior_ptid
, null_ptid
))
270 default_child_has_stack (struct target_ops
*ops
)
272 /* If no inferior selected, there's no stack. */
273 if (ptid_equal (inferior_ptid
, null_ptid
))
280 default_child_has_registers (struct target_ops
*ops
)
282 /* Can't read registers from no inferior. */
283 if (ptid_equal (inferior_ptid
, null_ptid
))
290 default_child_has_execution (struct target_ops
*ops
, ptid_t the_ptid
)
292 /* If there's no thread selected, then we can't make it run through
294 if (ptid_equal (the_ptid
, null_ptid
))
302 target_has_all_memory_1 (void)
304 struct target_ops
*t
;
306 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
307 if (t
->to_has_all_memory (t
))
314 target_has_memory_1 (void)
316 struct target_ops
*t
;
318 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
319 if (t
->to_has_memory (t
))
326 target_has_stack_1 (void)
328 struct target_ops
*t
;
330 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
331 if (t
->to_has_stack (t
))
338 target_has_registers_1 (void)
340 struct target_ops
*t
;
342 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
343 if (t
->to_has_registers (t
))
350 target_has_execution_1 (ptid_t the_ptid
)
352 struct target_ops
*t
;
354 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
355 if (t
->to_has_execution (t
, the_ptid
))
362 target_has_execution_current (void)
364 return target_has_execution_1 (inferior_ptid
);
367 /* Complete initialization of T. This ensures that various fields in
368 T are set, if needed by the target implementation. */
371 complete_target_initialization (struct target_ops
*t
)
373 /* Provide default values for all "must have" methods. */
375 if (t
->to_has_all_memory
== NULL
)
376 t
->to_has_all_memory
= return_zero
;
378 if (t
->to_has_memory
== NULL
)
379 t
->to_has_memory
= return_zero
;
381 if (t
->to_has_stack
== NULL
)
382 t
->to_has_stack
= return_zero
;
384 if (t
->to_has_registers
== NULL
)
385 t
->to_has_registers
= return_zero
;
387 if (t
->to_has_execution
== NULL
)
388 t
->to_has_execution
= return_zero_has_execution
;
390 /* These methods can be called on an unpushed target and so require
391 a default implementation if the target might plausibly be the
392 default run target. */
393 gdb_assert (t
->to_can_run
== NULL
|| (t
->to_can_async_p
!= NULL
394 && t
->to_supports_non_stop
!= NULL
));
396 install_delegators (t
);
399 /* Add possible target architecture T to the list and add a new
400 command 'target T->to_shortname'. Set COMPLETER as the command's
401 completer if not NULL. */
404 add_target_with_completer (struct target_ops
*t
,
405 completer_ftype
*completer
)
407 struct cmd_list_element
*c
;
409 complete_target_initialization (t
);
413 target_struct_allocsize
= DEFAULT_ALLOCSIZE
;
414 target_structs
= (struct target_ops
**) xmalloc
415 (target_struct_allocsize
* sizeof (*target_structs
));
417 if (target_struct_size
>= target_struct_allocsize
)
419 target_struct_allocsize
*= 2;
420 target_structs
= (struct target_ops
**)
421 xrealloc ((char *) target_structs
,
422 target_struct_allocsize
* sizeof (*target_structs
));
424 target_structs
[target_struct_size
++] = t
;
426 if (targetlist
== NULL
)
427 add_prefix_cmd ("target", class_run
, target_command
, _("\
428 Connect to a target machine or process.\n\
429 The first argument is the type or protocol of the target machine.\n\
430 Remaining arguments are interpreted by the target protocol. For more\n\
431 information on the arguments for a particular protocol, type\n\
432 `help target ' followed by the protocol name."),
433 &targetlist
, "target ", 0, &cmdlist
);
434 c
= add_cmd (t
->to_shortname
, no_class
, t
->to_open
, t
->to_doc
,
436 if (completer
!= NULL
)
437 set_cmd_completer (c
, completer
);
440 /* Add a possible target architecture to the list. */
443 add_target (struct target_ops
*t
)
445 add_target_with_completer (t
, NULL
);
451 add_deprecated_target_alias (struct target_ops
*t
, char *alias
)
453 struct cmd_list_element
*c
;
456 /* If we use add_alias_cmd, here, we do not get the deprecated warning,
458 c
= add_cmd (alias
, no_class
, t
->to_open
, t
->to_doc
, &targetlist
);
459 alt
= xstrprintf ("target %s", t
->to_shortname
);
460 deprecate_cmd (c
, alt
);
469 fprintf_unfiltered (gdb_stdlog
, "target_kill ()\n");
471 current_target
.to_kill (¤t_target
);
475 target_load (char *arg
, int from_tty
)
477 target_dcache_invalidate ();
478 (*current_target
.to_load
) (¤t_target
, arg
, from_tty
);
482 target_terminal_inferior (void)
484 /* A background resume (``run&'') should leave GDB in control of the
485 terminal. Use target_can_async_p, not target_is_async_p, since at
486 this point the target is not async yet. However, if sync_execution
487 is not set, we know it will become async prior to resume. */
488 if (target_can_async_p () && !sync_execution
)
491 /* If GDB is resuming the inferior in the foreground, install
492 inferior's terminal modes. */
493 (*current_target
.to_terminal_inferior
) (¤t_target
);
499 error (_("You can't do that when your target is `%s'"),
500 current_target
.to_shortname
);
506 error (_("You can't do that without a process to debug."));
510 default_terminal_info (struct target_ops
*self
, const char *args
, int from_tty
)
512 printf_unfiltered (_("No saved terminal information.\n"));
515 /* A default implementation for the to_get_ada_task_ptid target method.
517 This function builds the PTID by using both LWP and TID as part of
518 the PTID lwp and tid elements. The pid used is the pid of the
522 default_get_ada_task_ptid (struct target_ops
*self
, long lwp
, long tid
)
524 return ptid_build (ptid_get_pid (inferior_ptid
), lwp
, tid
);
527 static enum exec_direction_kind
528 default_execution_direction (struct target_ops
*self
)
530 if (!target_can_execute_reverse
)
532 else if (!target_can_async_p ())
535 gdb_assert_not_reached ("\
536 to_execution_direction must be implemented for reverse async");
539 /* Go through the target stack from top to bottom, copying over zero
540 entries in current_target, then filling in still empty entries. In
541 effect, we are doing class inheritance through the pushed target
544 NOTE: cagney/2003-10-17: The problem with this inheritance, as it
545 is currently implemented, is that it discards any knowledge of
546 which target an inherited method originally belonged to.
547 Consequently, new new target methods should instead explicitly and
548 locally search the target stack for the target that can handle the
552 update_current_target (void)
554 struct target_ops
*t
;
556 /* First, reset current's contents. */
557 memset (¤t_target
, 0, sizeof (current_target
));
559 /* Install the delegators. */
560 install_delegators (¤t_target
);
562 current_target
.to_stratum
= target_stack
->to_stratum
;
564 #define INHERIT(FIELD, TARGET) \
565 if (!current_target.FIELD) \
566 current_target.FIELD = (TARGET)->FIELD
568 /* Do not add any new INHERITs here. Instead, use the delegation
569 mechanism provided by make-target-delegates. */
570 for (t
= target_stack
; t
; t
= t
->beneath
)
572 INHERIT (to_shortname
, t
);
573 INHERIT (to_longname
, t
);
574 INHERIT (to_attach_no_wait
, t
);
575 INHERIT (to_have_steppable_watchpoint
, t
);
576 INHERIT (to_have_continuable_watchpoint
, t
);
577 INHERIT (to_has_thread_control
, t
);
581 /* Finally, position the target-stack beneath the squashed
582 "current_target". That way code looking for a non-inherited
583 target method can quickly and simply find it. */
584 current_target
.beneath
= target_stack
;
587 setup_target_debug ();
590 /* Push a new target type into the stack of the existing target accessors,
591 possibly superseding some of the existing accessors.
593 Rather than allow an empty stack, we always have the dummy target at
594 the bottom stratum, so we can call the function vectors without
598 push_target (struct target_ops
*t
)
600 struct target_ops
**cur
;
602 /* Check magic number. If wrong, it probably means someone changed
603 the struct definition, but not all the places that initialize one. */
604 if (t
->to_magic
!= OPS_MAGIC
)
606 fprintf_unfiltered (gdb_stderr
,
607 "Magic number of %s target struct wrong\n",
609 internal_error (__FILE__
, __LINE__
,
610 _("failed internal consistency check"));
613 /* Find the proper stratum to install this target in. */
614 for (cur
= &target_stack
; (*cur
) != NULL
; cur
= &(*cur
)->beneath
)
616 if ((int) (t
->to_stratum
) >= (int) (*cur
)->to_stratum
)
620 /* If there's already targets at this stratum, remove them. */
621 /* FIXME: cagney/2003-10-15: I think this should be popping all
622 targets to CUR, and not just those at this stratum level. */
623 while ((*cur
) != NULL
&& t
->to_stratum
== (*cur
)->to_stratum
)
625 /* There's already something at this stratum level. Close it,
626 and un-hook it from the stack. */
627 struct target_ops
*tmp
= (*cur
);
629 (*cur
) = (*cur
)->beneath
;
634 /* We have removed all targets in our stratum, now add the new one. */
638 update_current_target ();
641 /* Remove a target_ops vector from the stack, wherever it may be.
642 Return how many times it was removed (0 or 1). */
645 unpush_target (struct target_ops
*t
)
647 struct target_ops
**cur
;
648 struct target_ops
*tmp
;
650 if (t
->to_stratum
== dummy_stratum
)
651 internal_error (__FILE__
, __LINE__
,
652 _("Attempt to unpush the dummy target"));
654 /* Look for the specified target. Note that we assume that a target
655 can only occur once in the target stack. */
657 for (cur
= &target_stack
; (*cur
) != NULL
; cur
= &(*cur
)->beneath
)
663 /* If we don't find target_ops, quit. Only open targets should be
668 /* Unchain the target. */
670 (*cur
) = (*cur
)->beneath
;
673 update_current_target ();
675 /* Finally close the target. Note we do this after unchaining, so
676 any target method calls from within the target_close
677 implementation don't end up in T anymore. */
684 pop_all_targets_above (enum strata above_stratum
)
686 while ((int) (current_target
.to_stratum
) > (int) above_stratum
)
688 if (!unpush_target (target_stack
))
690 fprintf_unfiltered (gdb_stderr
,
691 "pop_all_targets couldn't find target %s\n",
692 target_stack
->to_shortname
);
693 internal_error (__FILE__
, __LINE__
,
694 _("failed internal consistency check"));
701 pop_all_targets (void)
703 pop_all_targets_above (dummy_stratum
);
706 /* Return 1 if T is now pushed in the target stack. Return 0 otherwise. */
709 target_is_pushed (struct target_ops
*t
)
711 struct target_ops
**cur
;
713 /* Check magic number. If wrong, it probably means someone changed
714 the struct definition, but not all the places that initialize one. */
715 if (t
->to_magic
!= OPS_MAGIC
)
717 fprintf_unfiltered (gdb_stderr
,
718 "Magic number of %s target struct wrong\n",
720 internal_error (__FILE__
, __LINE__
,
721 _("failed internal consistency check"));
724 for (cur
= &target_stack
; (*cur
) != NULL
; cur
= &(*cur
)->beneath
)
731 /* Using the objfile specified in OBJFILE, find the address for the
732 current thread's thread-local storage with offset OFFSET. */
734 target_translate_tls_address (struct objfile
*objfile
, CORE_ADDR offset
)
736 volatile CORE_ADDR addr
= 0;
737 struct target_ops
*target
;
739 for (target
= current_target
.beneath
;
741 target
= target
->beneath
)
743 if (target
->to_get_thread_local_address
!= NULL
)
748 && gdbarch_fetch_tls_load_module_address_p (target_gdbarch ()))
750 ptid_t ptid
= inferior_ptid
;
751 volatile struct gdb_exception ex
;
753 TRY_CATCH (ex
, RETURN_MASK_ALL
)
757 /* Fetch the load module address for this objfile. */
758 lm_addr
= gdbarch_fetch_tls_load_module_address (target_gdbarch (),
761 addr
= target
->to_get_thread_local_address (target
, ptid
,
764 /* If an error occurred, print TLS related messages here. Otherwise,
765 throw the error to some higher catcher. */
768 int objfile_is_library
= (objfile
->flags
& OBJF_SHARED
);
772 case TLS_NO_LIBRARY_SUPPORT_ERROR
:
773 error (_("Cannot find thread-local variables "
774 "in this thread library."));
776 case TLS_LOAD_MODULE_NOT_FOUND_ERROR
:
777 if (objfile_is_library
)
778 error (_("Cannot find shared library `%s' in dynamic"
779 " linker's load module list"), objfile_name (objfile
));
781 error (_("Cannot find executable file `%s' in dynamic"
782 " linker's load module list"), objfile_name (objfile
));
784 case TLS_NOT_ALLOCATED_YET_ERROR
:
785 if (objfile_is_library
)
786 error (_("The inferior has not yet allocated storage for"
787 " thread-local variables in\n"
788 "the shared library `%s'\n"
790 objfile_name (objfile
), target_pid_to_str (ptid
));
792 error (_("The inferior has not yet allocated storage for"
793 " thread-local variables in\n"
794 "the executable `%s'\n"
796 objfile_name (objfile
), target_pid_to_str (ptid
));
798 case TLS_GENERIC_ERROR
:
799 if (objfile_is_library
)
800 error (_("Cannot find thread-local storage for %s, "
801 "shared library %s:\n%s"),
802 target_pid_to_str (ptid
),
803 objfile_name (objfile
), ex
.message
);
805 error (_("Cannot find thread-local storage for %s, "
806 "executable file %s:\n%s"),
807 target_pid_to_str (ptid
),
808 objfile_name (objfile
), ex
.message
);
811 throw_exception (ex
);
816 /* It wouldn't be wrong here to try a gdbarch method, too; finding
817 TLS is an ABI-specific thing. But we don't do that yet. */
819 error (_("Cannot find thread-local variables on this target"));
825 target_xfer_status_to_string (enum target_xfer_status status
)
827 #define CASE(X) case X: return #X
830 CASE(TARGET_XFER_E_IO
);
831 CASE(TARGET_XFER_UNAVAILABLE
);
840 #define MIN(A, B) (((A) <= (B)) ? (A) : (B))
842 /* target_read_string -- read a null terminated string, up to LEN bytes,
843 from MEMADDR in target. Set *ERRNOP to the errno code, or 0 if successful.
844 Set *STRING to a pointer to malloc'd memory containing the data; the caller
845 is responsible for freeing it. Return the number of bytes successfully
849 target_read_string (CORE_ADDR memaddr
, char **string
, int len
, int *errnop
)
855 int buffer_allocated
;
857 unsigned int nbytes_read
= 0;
861 /* Small for testing. */
862 buffer_allocated
= 4;
863 buffer
= xmalloc (buffer_allocated
);
868 tlen
= MIN (len
, 4 - (memaddr
& 3));
869 offset
= memaddr
& 3;
871 errcode
= target_read_memory (memaddr
& ~3, buf
, sizeof buf
);
874 /* The transfer request might have crossed the boundary to an
875 unallocated region of memory. Retry the transfer, requesting
879 errcode
= target_read_memory (memaddr
, buf
, 1);
884 if (bufptr
- buffer
+ tlen
> buffer_allocated
)
888 bytes
= bufptr
- buffer
;
889 buffer_allocated
*= 2;
890 buffer
= xrealloc (buffer
, buffer_allocated
);
891 bufptr
= buffer
+ bytes
;
894 for (i
= 0; i
< tlen
; i
++)
896 *bufptr
++ = buf
[i
+ offset
];
897 if (buf
[i
+ offset
] == '\000')
899 nbytes_read
+= i
+ 1;
915 struct target_section_table
*
916 target_get_section_table (struct target_ops
*target
)
919 fprintf_unfiltered (gdb_stdlog
, "target_get_section_table ()\n");
921 return (*target
->to_get_section_table
) (target
);
924 /* Find a section containing ADDR. */
926 struct target_section
*
927 target_section_by_addr (struct target_ops
*target
, CORE_ADDR addr
)
929 struct target_section_table
*table
= target_get_section_table (target
);
930 struct target_section
*secp
;
935 for (secp
= table
->sections
; secp
< table
->sections_end
; secp
++)
937 if (addr
>= secp
->addr
&& addr
< secp
->endaddr
)
943 /* Read memory from more than one valid target. A core file, for
944 instance, could have some of memory but delegate other bits to
945 the target below it. So, we must manually try all targets. */
947 static enum target_xfer_status
948 raw_memory_xfer_partial (struct target_ops
*ops
, gdb_byte
*readbuf
,
949 const gdb_byte
*writebuf
, ULONGEST memaddr
, LONGEST len
,
950 ULONGEST
*xfered_len
)
952 enum target_xfer_status res
;
956 res
= ops
->to_xfer_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
957 readbuf
, writebuf
, memaddr
, len
,
959 if (res
== TARGET_XFER_OK
)
962 /* Stop if the target reports that the memory is not available. */
963 if (res
== TARGET_XFER_UNAVAILABLE
)
966 /* We want to continue past core files to executables, but not
967 past a running target's memory. */
968 if (ops
->to_has_all_memory (ops
))
975 /* The cache works at the raw memory level. Make sure the cache
976 gets updated with raw contents no matter what kind of memory
977 object was originally being written. Note we do write-through
978 first, so that if it fails, we don't write to the cache contents
979 that never made it to the target. */
981 && !ptid_equal (inferior_ptid
, null_ptid
)
982 && target_dcache_init_p ()
983 && (stack_cache_enabled_p () || code_cache_enabled_p ()))
985 DCACHE
*dcache
= target_dcache_get ();
987 /* Note that writing to an area of memory which wasn't present
988 in the cache doesn't cause it to be loaded in. */
989 dcache_update (dcache
, res
, memaddr
, writebuf
, *xfered_len
);
995 /* Perform a partial memory transfer.
996 For docs see target.h, to_xfer_partial. */
998 static enum target_xfer_status
999 memory_xfer_partial_1 (struct target_ops
*ops
, enum target_object object
,
1000 gdb_byte
*readbuf
, const gdb_byte
*writebuf
, ULONGEST memaddr
,
1001 ULONGEST len
, ULONGEST
*xfered_len
)
1003 enum target_xfer_status res
;
1005 struct mem_region
*region
;
1006 struct inferior
*inf
;
1008 /* For accesses to unmapped overlay sections, read directly from
1009 files. Must do this first, as MEMADDR may need adjustment. */
1010 if (readbuf
!= NULL
&& overlay_debugging
)
1012 struct obj_section
*section
= find_pc_overlay (memaddr
);
1014 if (pc_in_unmapped_range (memaddr
, section
))
1016 struct target_section_table
*table
1017 = target_get_section_table (ops
);
1018 const char *section_name
= section
->the_bfd_section
->name
;
1020 memaddr
= overlay_mapped_address (memaddr
, section
);
1021 return section_table_xfer_memory_partial (readbuf
, writebuf
,
1022 memaddr
, len
, xfered_len
,
1024 table
->sections_end
,
1029 /* Try the executable files, if "trust-readonly-sections" is set. */
1030 if (readbuf
!= NULL
&& trust_readonly
)
1032 struct target_section
*secp
;
1033 struct target_section_table
*table
;
1035 secp
= target_section_by_addr (ops
, memaddr
);
1037 && (bfd_get_section_flags (secp
->the_bfd_section
->owner
,
1038 secp
->the_bfd_section
)
1041 table
= target_get_section_table (ops
);
1042 return section_table_xfer_memory_partial (readbuf
, writebuf
,
1043 memaddr
, len
, xfered_len
,
1045 table
->sections_end
,
1050 /* Try GDB's internal data cache. */
1051 region
= lookup_mem_region (memaddr
);
1052 /* region->hi == 0 means there's no upper bound. */
1053 if (memaddr
+ len
< region
->hi
|| region
->hi
== 0)
1056 reg_len
= region
->hi
- memaddr
;
1058 switch (region
->attrib
.mode
)
1061 if (writebuf
!= NULL
)
1062 return TARGET_XFER_E_IO
;
1066 if (readbuf
!= NULL
)
1067 return TARGET_XFER_E_IO
;
1071 /* We only support writing to flash during "load" for now. */
1072 if (writebuf
!= NULL
)
1073 error (_("Writing to flash memory forbidden in this context"));
1077 return TARGET_XFER_E_IO
;
1080 if (!ptid_equal (inferior_ptid
, null_ptid
))
1081 inf
= find_inferior_pid (ptid_get_pid (inferior_ptid
));
1087 /* The dcache reads whole cache lines; that doesn't play well
1088 with reading from a trace buffer, because reading outside of
1089 the collected memory range fails. */
1090 && get_traceframe_number () == -1
1091 && (region
->attrib
.cache
1092 || (stack_cache_enabled_p () && object
== TARGET_OBJECT_STACK_MEMORY
)
1093 || (code_cache_enabled_p () && object
== TARGET_OBJECT_CODE_MEMORY
)))
1095 DCACHE
*dcache
= target_dcache_get_or_init ();
1097 return dcache_read_memory_partial (ops
, dcache
, memaddr
, readbuf
,
1098 reg_len
, xfered_len
);
1101 /* If none of those methods found the memory we wanted, fall back
1102 to a target partial transfer. Normally a single call to
1103 to_xfer_partial is enough; if it doesn't recognize an object
1104 it will call the to_xfer_partial of the next target down.
1105 But for memory this won't do. Memory is the only target
1106 object which can be read from more than one valid target.
1107 A core file, for instance, could have some of memory but
1108 delegate other bits to the target below it. So, we must
1109 manually try all targets. */
1111 res
= raw_memory_xfer_partial (ops
, readbuf
, writebuf
, memaddr
, reg_len
,
1114 /* If we still haven't got anything, return the last error. We
1119 /* Perform a partial memory transfer. For docs see target.h,
1122 static enum target_xfer_status
1123 memory_xfer_partial (struct target_ops
*ops
, enum target_object object
,
1124 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1125 ULONGEST memaddr
, ULONGEST len
, ULONGEST
*xfered_len
)
1127 enum target_xfer_status res
;
1129 /* Zero length requests are ok and require no work. */
1131 return TARGET_XFER_EOF
;
1133 /* Fill in READBUF with breakpoint shadows, or WRITEBUF with
1134 breakpoint insns, thus hiding out from higher layers whether
1135 there are software breakpoints inserted in the code stream. */
1136 if (readbuf
!= NULL
)
1138 res
= memory_xfer_partial_1 (ops
, object
, readbuf
, NULL
, memaddr
, len
,
1141 if (res
== TARGET_XFER_OK
&& !show_memory_breakpoints
)
1142 breakpoint_xfer_memory (readbuf
, NULL
, NULL
, memaddr
, *xfered_len
);
1147 struct cleanup
*old_chain
;
1149 /* A large write request is likely to be partially satisfied
1150 by memory_xfer_partial_1. We will continually malloc
1151 and free a copy of the entire write request for breakpoint
1152 shadow handling even though we only end up writing a small
1153 subset of it. Cap writes to 4KB to mitigate this. */
1154 len
= min (4096, len
);
1156 buf
= xmalloc (len
);
1157 old_chain
= make_cleanup (xfree
, buf
);
1158 memcpy (buf
, writebuf
, len
);
1160 breakpoint_xfer_memory (NULL
, buf
, writebuf
, memaddr
, len
);
1161 res
= memory_xfer_partial_1 (ops
, object
, NULL
, buf
, memaddr
, len
,
1164 do_cleanups (old_chain
);
1171 restore_show_memory_breakpoints (void *arg
)
1173 show_memory_breakpoints
= (uintptr_t) arg
;
1177 make_show_memory_breakpoints_cleanup (int show
)
1179 int current
= show_memory_breakpoints
;
1181 show_memory_breakpoints
= show
;
1182 return make_cleanup (restore_show_memory_breakpoints
,
1183 (void *) (uintptr_t) current
);
1186 /* For docs see target.h, to_xfer_partial. */
1188 enum target_xfer_status
1189 target_xfer_partial (struct target_ops
*ops
,
1190 enum target_object object
, const char *annex
,
1191 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1192 ULONGEST offset
, ULONGEST len
,
1193 ULONGEST
*xfered_len
)
1195 enum target_xfer_status retval
;
1197 gdb_assert (ops
->to_xfer_partial
!= NULL
);
1199 /* Transfer is done when LEN is zero. */
1201 return TARGET_XFER_EOF
;
1203 if (writebuf
&& !may_write_memory
)
1204 error (_("Writing to memory is not allowed (addr %s, len %s)"),
1205 core_addr_to_string_nz (offset
), plongest (len
));
1209 /* If this is a memory transfer, let the memory-specific code
1210 have a look at it instead. Memory transfers are more
1212 if (object
== TARGET_OBJECT_MEMORY
|| object
== TARGET_OBJECT_STACK_MEMORY
1213 || object
== TARGET_OBJECT_CODE_MEMORY
)
1214 retval
= memory_xfer_partial (ops
, object
, readbuf
,
1215 writebuf
, offset
, len
, xfered_len
);
1216 else if (object
== TARGET_OBJECT_RAW_MEMORY
)
1218 /* Request the normal memory object from other layers. */
1219 retval
= raw_memory_xfer_partial (ops
, readbuf
, writebuf
, offset
, len
,
1223 retval
= ops
->to_xfer_partial (ops
, object
, annex
, readbuf
,
1224 writebuf
, offset
, len
, xfered_len
);
1228 const unsigned char *myaddr
= NULL
;
1230 fprintf_unfiltered (gdb_stdlog
,
1231 "%s:target_xfer_partial "
1232 "(%d, %s, %s, %s, %s, %s) = %d, %s",
1235 (annex
? annex
: "(null)"),
1236 host_address_to_string (readbuf
),
1237 host_address_to_string (writebuf
),
1238 core_addr_to_string_nz (offset
),
1239 pulongest (len
), retval
,
1240 pulongest (*xfered_len
));
1246 if (retval
== TARGET_XFER_OK
&& myaddr
!= NULL
)
1250 fputs_unfiltered (", bytes =", gdb_stdlog
);
1251 for (i
= 0; i
< *xfered_len
; i
++)
1253 if ((((intptr_t) &(myaddr
[i
])) & 0xf) == 0)
1255 if (targetdebug
< 2 && i
> 0)
1257 fprintf_unfiltered (gdb_stdlog
, " ...");
1260 fprintf_unfiltered (gdb_stdlog
, "\n");
1263 fprintf_unfiltered (gdb_stdlog
, " %02x", myaddr
[i
] & 0xff);
1267 fputc_unfiltered ('\n', gdb_stdlog
);
1270 /* Check implementations of to_xfer_partial update *XFERED_LEN
1271 properly. Do assertion after printing debug messages, so that we
1272 can find more clues on assertion failure from debugging messages. */
1273 if (retval
== TARGET_XFER_OK
|| retval
== TARGET_XFER_UNAVAILABLE
)
1274 gdb_assert (*xfered_len
> 0);
1279 /* Read LEN bytes of target memory at address MEMADDR, placing the
1280 results in GDB's memory at MYADDR. Returns either 0 for success or
1281 TARGET_XFER_E_IO if any error occurs.
1283 If an error occurs, no guarantee is made about the contents of the data at
1284 MYADDR. In particular, the caller should not depend upon partial reads
1285 filling the buffer with good data. There is no way for the caller to know
1286 how much good data might have been transfered anyway. Callers that can
1287 deal with partial reads should call target_read (which will retry until
1288 it makes no progress, and then return how much was transferred). */
1291 target_read_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1293 /* Dispatch to the topmost target, not the flattened current_target.
1294 Memory accesses check target->to_has_(all_)memory, and the
1295 flattened target doesn't inherit those. */
1296 if (target_read (current_target
.beneath
, TARGET_OBJECT_MEMORY
, NULL
,
1297 myaddr
, memaddr
, len
) == len
)
1300 return TARGET_XFER_E_IO
;
1303 /* Like target_read_memory, but specify explicitly that this is a read
1304 from the target's raw memory. That is, this read bypasses the
1305 dcache, breakpoint shadowing, etc. */
1308 target_read_raw_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1310 /* See comment in target_read_memory about why the request starts at
1311 current_target.beneath. */
1312 if (target_read (current_target
.beneath
, TARGET_OBJECT_RAW_MEMORY
, NULL
,
1313 myaddr
, memaddr
, len
) == len
)
1316 return TARGET_XFER_E_IO
;
1319 /* Like target_read_memory, but specify explicitly that this is a read from
1320 the target's stack. This may trigger different cache behavior. */
1323 target_read_stack (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1325 /* See comment in target_read_memory about why the request starts at
1326 current_target.beneath. */
1327 if (target_read (current_target
.beneath
, TARGET_OBJECT_STACK_MEMORY
, NULL
,
1328 myaddr
, memaddr
, len
) == len
)
1331 return TARGET_XFER_E_IO
;
1334 /* Like target_read_memory, but specify explicitly that this is a read from
1335 the target's code. This may trigger different cache behavior. */
1338 target_read_code (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1340 /* See comment in target_read_memory about why the request starts at
1341 current_target.beneath. */
1342 if (target_read (current_target
.beneath
, TARGET_OBJECT_CODE_MEMORY
, NULL
,
1343 myaddr
, memaddr
, len
) == len
)
1346 return TARGET_XFER_E_IO
;
1349 /* Write LEN bytes from MYADDR to target memory at address MEMADDR.
1350 Returns either 0 for success or TARGET_XFER_E_IO if any
1351 error occurs. If an error occurs, no guarantee is made about how
1352 much data got written. Callers that can deal with partial writes
1353 should call target_write. */
1356 target_write_memory (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ssize_t len
)
1358 /* See comment in target_read_memory about why the request starts at
1359 current_target.beneath. */
1360 if (target_write (current_target
.beneath
, TARGET_OBJECT_MEMORY
, NULL
,
1361 myaddr
, memaddr
, len
) == len
)
1364 return TARGET_XFER_E_IO
;
1367 /* Write LEN bytes from MYADDR to target raw memory at address
1368 MEMADDR. Returns either 0 for success or TARGET_XFER_E_IO
1369 if any error occurs. If an error occurs, no guarantee is made
1370 about how much data got written. Callers that can deal with
1371 partial writes should call target_write. */
1374 target_write_raw_memory (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ssize_t len
)
1376 /* See comment in target_read_memory about why the request starts at
1377 current_target.beneath. */
1378 if (target_write (current_target
.beneath
, TARGET_OBJECT_RAW_MEMORY
, NULL
,
1379 myaddr
, memaddr
, len
) == len
)
1382 return TARGET_XFER_E_IO
;
1385 /* Fetch the target's memory map. */
1388 target_memory_map (void)
1390 VEC(mem_region_s
) *result
;
1391 struct mem_region
*last_one
, *this_one
;
1393 struct target_ops
*t
;
1396 fprintf_unfiltered (gdb_stdlog
, "target_memory_map ()\n");
1398 result
= current_target
.to_memory_map (¤t_target
);
1402 qsort (VEC_address (mem_region_s
, result
),
1403 VEC_length (mem_region_s
, result
),
1404 sizeof (struct mem_region
), mem_region_cmp
);
1406 /* Check that regions do not overlap. Simultaneously assign
1407 a numbering for the "mem" commands to use to refer to
1410 for (ix
= 0; VEC_iterate (mem_region_s
, result
, ix
, this_one
); ix
++)
1412 this_one
->number
= ix
;
1414 if (last_one
&& last_one
->hi
> this_one
->lo
)
1416 warning (_("Overlapping regions in memory map: ignoring"));
1417 VEC_free (mem_region_s
, result
);
1420 last_one
= this_one
;
1427 target_flash_erase (ULONGEST address
, LONGEST length
)
1430 fprintf_unfiltered (gdb_stdlog
, "target_flash_erase (%s, %s)\n",
1431 hex_string (address
), phex (length
, 0));
1432 current_target
.to_flash_erase (¤t_target
, address
, length
);
1436 target_flash_done (void)
1439 fprintf_unfiltered (gdb_stdlog
, "target_flash_done\n");
1440 current_target
.to_flash_done (¤t_target
);
1444 show_trust_readonly (struct ui_file
*file
, int from_tty
,
1445 struct cmd_list_element
*c
, const char *value
)
1447 fprintf_filtered (file
,
1448 _("Mode for reading from readonly sections is %s.\n"),
1452 /* Target vector read/write partial wrapper functions. */
1454 static enum target_xfer_status
1455 target_read_partial (struct target_ops
*ops
,
1456 enum target_object object
,
1457 const char *annex
, gdb_byte
*buf
,
1458 ULONGEST offset
, ULONGEST len
,
1459 ULONGEST
*xfered_len
)
1461 return target_xfer_partial (ops
, object
, annex
, buf
, NULL
, offset
, len
,
1465 static enum target_xfer_status
1466 target_write_partial (struct target_ops
*ops
,
1467 enum target_object object
,
1468 const char *annex
, const gdb_byte
*buf
,
1469 ULONGEST offset
, LONGEST len
, ULONGEST
*xfered_len
)
1471 return target_xfer_partial (ops
, object
, annex
, NULL
, buf
, offset
, len
,
1475 /* Wrappers to perform the full transfer. */
1477 /* For docs on target_read see target.h. */
1480 target_read (struct target_ops
*ops
,
1481 enum target_object object
,
1482 const char *annex
, gdb_byte
*buf
,
1483 ULONGEST offset
, LONGEST len
)
1487 while (xfered
< len
)
1489 ULONGEST xfered_len
;
1490 enum target_xfer_status status
;
1492 status
= target_read_partial (ops
, object
, annex
,
1493 (gdb_byte
*) buf
+ xfered
,
1494 offset
+ xfered
, len
- xfered
,
1497 /* Call an observer, notifying them of the xfer progress? */
1498 if (status
== TARGET_XFER_EOF
)
1500 else if (status
== TARGET_XFER_OK
)
1502 xfered
+= xfered_len
;
1512 /* Assuming that the entire [begin, end) range of memory cannot be
1513 read, try to read whatever subrange is possible to read.
1515 The function returns, in RESULT, either zero or one memory block.
1516 If there's a readable subrange at the beginning, it is completely
1517 read and returned. Any further readable subrange will not be read.
1518 Otherwise, if there's a readable subrange at the end, it will be
1519 completely read and returned. Any readable subranges before it
1520 (obviously, not starting at the beginning), will be ignored. In
1521 other cases -- either no readable subrange, or readable subrange(s)
1522 that is neither at the beginning, or end, nothing is returned.
1524 The purpose of this function is to handle a read across a boundary
1525 of accessible memory in a case when memory map is not available.
1526 The above restrictions are fine for this case, but will give
1527 incorrect results if the memory is 'patchy'. However, supporting
1528 'patchy' memory would require trying to read every single byte,
1529 and it seems unacceptable solution. Explicit memory map is
1530 recommended for this case -- and target_read_memory_robust will
1531 take care of reading multiple ranges then. */
1534 read_whatever_is_readable (struct target_ops
*ops
,
1535 ULONGEST begin
, ULONGEST end
,
1536 VEC(memory_read_result_s
) **result
)
1538 gdb_byte
*buf
= xmalloc (end
- begin
);
1539 ULONGEST current_begin
= begin
;
1540 ULONGEST current_end
= end
;
1542 memory_read_result_s r
;
1543 ULONGEST xfered_len
;
1545 /* If we previously failed to read 1 byte, nothing can be done here. */
1546 if (end
- begin
<= 1)
1552 /* Check that either first or the last byte is readable, and give up
1553 if not. This heuristic is meant to permit reading accessible memory
1554 at the boundary of accessible region. */
1555 if (target_read_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1556 buf
, begin
, 1, &xfered_len
) == TARGET_XFER_OK
)
1561 else if (target_read_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1562 buf
+ (end
-begin
) - 1, end
- 1, 1,
1563 &xfered_len
) == TARGET_XFER_OK
)
1574 /* Loop invariant is that the [current_begin, current_end) was previously
1575 found to be not readable as a whole.
1577 Note loop condition -- if the range has 1 byte, we can't divide the range
1578 so there's no point trying further. */
1579 while (current_end
- current_begin
> 1)
1581 ULONGEST first_half_begin
, first_half_end
;
1582 ULONGEST second_half_begin
, second_half_end
;
1584 ULONGEST middle
= current_begin
+ (current_end
- current_begin
)/2;
1588 first_half_begin
= current_begin
;
1589 first_half_end
= middle
;
1590 second_half_begin
= middle
;
1591 second_half_end
= current_end
;
1595 first_half_begin
= middle
;
1596 first_half_end
= current_end
;
1597 second_half_begin
= current_begin
;
1598 second_half_end
= middle
;
1601 xfer
= target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1602 buf
+ (first_half_begin
- begin
),
1604 first_half_end
- first_half_begin
);
1606 if (xfer
== first_half_end
- first_half_begin
)
1608 /* This half reads up fine. So, the error must be in the
1610 current_begin
= second_half_begin
;
1611 current_end
= second_half_end
;
1615 /* This half is not readable. Because we've tried one byte, we
1616 know some part of this half if actually redable. Go to the next
1617 iteration to divide again and try to read.
1619 We don't handle the other half, because this function only tries
1620 to read a single readable subrange. */
1621 current_begin
= first_half_begin
;
1622 current_end
= first_half_end
;
1628 /* The [begin, current_begin) range has been read. */
1630 r
.end
= current_begin
;
1635 /* The [current_end, end) range has been read. */
1636 LONGEST rlen
= end
- current_end
;
1638 r
.data
= xmalloc (rlen
);
1639 memcpy (r
.data
, buf
+ current_end
- begin
, rlen
);
1640 r
.begin
= current_end
;
1644 VEC_safe_push(memory_read_result_s
, (*result
), &r
);
1648 free_memory_read_result_vector (void *x
)
1650 VEC(memory_read_result_s
) *v
= x
;
1651 memory_read_result_s
*current
;
1654 for (ix
= 0; VEC_iterate (memory_read_result_s
, v
, ix
, current
); ++ix
)
1656 xfree (current
->data
);
1658 VEC_free (memory_read_result_s
, v
);
1661 VEC(memory_read_result_s
) *
1662 read_memory_robust (struct target_ops
*ops
, ULONGEST offset
, LONGEST len
)
1664 VEC(memory_read_result_s
) *result
= 0;
1667 while (xfered
< len
)
1669 struct mem_region
*region
= lookup_mem_region (offset
+ xfered
);
1672 /* If there is no explicit region, a fake one should be created. */
1673 gdb_assert (region
);
1675 if (region
->hi
== 0)
1676 rlen
= len
- xfered
;
1678 rlen
= region
->hi
- offset
;
1680 if (region
->attrib
.mode
== MEM_NONE
|| region
->attrib
.mode
== MEM_WO
)
1682 /* Cannot read this region. Note that we can end up here only
1683 if the region is explicitly marked inaccessible, or
1684 'inaccessible-by-default' is in effect. */
1689 LONGEST to_read
= min (len
- xfered
, rlen
);
1690 gdb_byte
*buffer
= (gdb_byte
*)xmalloc (to_read
);
1692 LONGEST xfer
= target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1693 (gdb_byte
*) buffer
,
1694 offset
+ xfered
, to_read
);
1695 /* Call an observer, notifying them of the xfer progress? */
1698 /* Got an error reading full chunk. See if maybe we can read
1701 read_whatever_is_readable (ops
, offset
+ xfered
,
1702 offset
+ xfered
+ to_read
, &result
);
1707 struct memory_read_result r
;
1709 r
.begin
= offset
+ xfered
;
1710 r
.end
= r
.begin
+ xfer
;
1711 VEC_safe_push (memory_read_result_s
, result
, &r
);
1721 /* An alternative to target_write with progress callbacks. */
1724 target_write_with_progress (struct target_ops
*ops
,
1725 enum target_object object
,
1726 const char *annex
, const gdb_byte
*buf
,
1727 ULONGEST offset
, LONGEST len
,
1728 void (*progress
) (ULONGEST
, void *), void *baton
)
1732 /* Give the progress callback a chance to set up. */
1734 (*progress
) (0, baton
);
1736 while (xfered
< len
)
1738 ULONGEST xfered_len
;
1739 enum target_xfer_status status
;
1741 status
= target_write_partial (ops
, object
, annex
,
1742 (gdb_byte
*) buf
+ xfered
,
1743 offset
+ xfered
, len
- xfered
,
1746 if (status
!= TARGET_XFER_OK
)
1747 return status
== TARGET_XFER_EOF
? xfered
: -1;
1750 (*progress
) (xfered_len
, baton
);
1752 xfered
+= xfered_len
;
1758 /* For docs on target_write see target.h. */
1761 target_write (struct target_ops
*ops
,
1762 enum target_object object
,
1763 const char *annex
, const gdb_byte
*buf
,
1764 ULONGEST offset
, LONGEST len
)
1766 return target_write_with_progress (ops
, object
, annex
, buf
, offset
, len
,
1770 /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return
1771 the size of the transferred data. PADDING additional bytes are
1772 available in *BUF_P. This is a helper function for
1773 target_read_alloc; see the declaration of that function for more
1777 target_read_alloc_1 (struct target_ops
*ops
, enum target_object object
,
1778 const char *annex
, gdb_byte
**buf_p
, int padding
)
1780 size_t buf_alloc
, buf_pos
;
1783 /* This function does not have a length parameter; it reads the
1784 entire OBJECT). Also, it doesn't support objects fetched partly
1785 from one target and partly from another (in a different stratum,
1786 e.g. a core file and an executable). Both reasons make it
1787 unsuitable for reading memory. */
1788 gdb_assert (object
!= TARGET_OBJECT_MEMORY
);
1790 /* Start by reading up to 4K at a time. The target will throttle
1791 this number down if necessary. */
1793 buf
= xmalloc (buf_alloc
);
1797 ULONGEST xfered_len
;
1798 enum target_xfer_status status
;
1800 status
= target_read_partial (ops
, object
, annex
, &buf
[buf_pos
],
1801 buf_pos
, buf_alloc
- buf_pos
- padding
,
1804 if (status
== TARGET_XFER_EOF
)
1806 /* Read all there was. */
1813 else if (status
!= TARGET_XFER_OK
)
1815 /* An error occurred. */
1817 return TARGET_XFER_E_IO
;
1820 buf_pos
+= xfered_len
;
1822 /* If the buffer is filling up, expand it. */
1823 if (buf_alloc
< buf_pos
* 2)
1826 buf
= xrealloc (buf
, buf_alloc
);
1833 /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return
1834 the size of the transferred data. See the declaration in "target.h"
1835 function for more information about the return value. */
1838 target_read_alloc (struct target_ops
*ops
, enum target_object object
,
1839 const char *annex
, gdb_byte
**buf_p
)
1841 return target_read_alloc_1 (ops
, object
, annex
, buf_p
, 0);
1844 /* Read OBJECT/ANNEX using OPS. The result is NUL-terminated and
1845 returned as a string, allocated using xmalloc. If an error occurs
1846 or the transfer is unsupported, NULL is returned. Empty objects
1847 are returned as allocated but empty strings. A warning is issued
1848 if the result contains any embedded NUL bytes. */
1851 target_read_stralloc (struct target_ops
*ops
, enum target_object object
,
1856 LONGEST i
, transferred
;
1858 transferred
= target_read_alloc_1 (ops
, object
, annex
, &buffer
, 1);
1859 bufstr
= (char *) buffer
;
1861 if (transferred
< 0)
1864 if (transferred
== 0)
1865 return xstrdup ("");
1867 bufstr
[transferred
] = 0;
1869 /* Check for embedded NUL bytes; but allow trailing NULs. */
1870 for (i
= strlen (bufstr
); i
< transferred
; i
++)
1873 warning (_("target object %d, annex %s, "
1874 "contained unexpected null characters"),
1875 (int) object
, annex
? annex
: "(none)");
1882 /* Memory transfer methods. */
1885 get_target_memory (struct target_ops
*ops
, CORE_ADDR addr
, gdb_byte
*buf
,
1888 /* This method is used to read from an alternate, non-current
1889 target. This read must bypass the overlay support (as symbols
1890 don't match this target), and GDB's internal cache (wrong cache
1891 for this target). */
1892 if (target_read (ops
, TARGET_OBJECT_RAW_MEMORY
, NULL
, buf
, addr
, len
)
1894 memory_error (TARGET_XFER_E_IO
, addr
);
1898 get_target_memory_unsigned (struct target_ops
*ops
, CORE_ADDR addr
,
1899 int len
, enum bfd_endian byte_order
)
1901 gdb_byte buf
[sizeof (ULONGEST
)];
1903 gdb_assert (len
<= sizeof (buf
));
1904 get_target_memory (ops
, addr
, buf
, len
);
1905 return extract_unsigned_integer (buf
, len
, byte_order
);
1911 target_insert_breakpoint (struct gdbarch
*gdbarch
,
1912 struct bp_target_info
*bp_tgt
)
1914 if (!may_insert_breakpoints
)
1916 warning (_("May not insert breakpoints"));
1920 return current_target
.to_insert_breakpoint (¤t_target
,
1927 target_remove_breakpoint (struct gdbarch
*gdbarch
,
1928 struct bp_target_info
*bp_tgt
)
1930 /* This is kind of a weird case to handle, but the permission might
1931 have been changed after breakpoints were inserted - in which case
1932 we should just take the user literally and assume that any
1933 breakpoints should be left in place. */
1934 if (!may_insert_breakpoints
)
1936 warning (_("May not remove breakpoints"));
1940 return current_target
.to_remove_breakpoint (¤t_target
,
1945 target_info (char *args
, int from_tty
)
1947 struct target_ops
*t
;
1948 int has_all_mem
= 0;
1950 if (symfile_objfile
!= NULL
)
1951 printf_unfiltered (_("Symbols from \"%s\".\n"),
1952 objfile_name (symfile_objfile
));
1954 for (t
= target_stack
; t
!= NULL
; t
= t
->beneath
)
1956 if (!(*t
->to_has_memory
) (t
))
1959 if ((int) (t
->to_stratum
) <= (int) dummy_stratum
)
1962 printf_unfiltered (_("\tWhile running this, "
1963 "GDB does not access memory from...\n"));
1964 printf_unfiltered ("%s:\n", t
->to_longname
);
1965 (t
->to_files_info
) (t
);
1966 has_all_mem
= (*t
->to_has_all_memory
) (t
);
1970 /* This function is called before any new inferior is created, e.g.
1971 by running a program, attaching, or connecting to a target.
1972 It cleans up any state from previous invocations which might
1973 change between runs. This is a subset of what target_preopen
1974 resets (things which might change between targets). */
1977 target_pre_inferior (int from_tty
)
1979 /* Clear out solib state. Otherwise the solib state of the previous
1980 inferior might have survived and is entirely wrong for the new
1981 target. This has been observed on GNU/Linux using glibc 2.3. How
1993 Cannot access memory at address 0xdeadbeef
1996 /* In some OSs, the shared library list is the same/global/shared
1997 across inferiors. If code is shared between processes, so are
1998 memory regions and features. */
1999 if (!gdbarch_has_global_solist (target_gdbarch ()))
2001 no_shared_libraries (NULL
, from_tty
);
2003 invalidate_target_mem_regions ();
2005 target_clear_description ();
2008 agent_capability_invalidate ();
2011 /* Callback for iterate_over_inferiors. Gets rid of the given
2015 dispose_inferior (struct inferior
*inf
, void *args
)
2017 struct thread_info
*thread
;
2019 thread
= any_thread_of_process (inf
->pid
);
2022 switch_to_thread (thread
->ptid
);
2024 /* Core inferiors actually should be detached, not killed. */
2025 if (target_has_execution
)
2028 target_detach (NULL
, 0);
2034 /* This is to be called by the open routine before it does
2038 target_preopen (int from_tty
)
2042 if (have_inferiors ())
2045 || !have_live_inferiors ()
2046 || query (_("A program is being debugged already. Kill it? ")))
2047 iterate_over_inferiors (dispose_inferior
, NULL
);
2049 error (_("Program not killed."));
2052 /* Calling target_kill may remove the target from the stack. But if
2053 it doesn't (which seems like a win for UDI), remove it now. */
2054 /* Leave the exec target, though. The user may be switching from a
2055 live process to a core of the same program. */
2056 pop_all_targets_above (file_stratum
);
2058 target_pre_inferior (from_tty
);
2061 /* Detach a target after doing deferred register stores. */
2064 target_detach (const char *args
, int from_tty
)
2066 struct target_ops
* t
;
2068 if (gdbarch_has_global_breakpoints (target_gdbarch ()))
2069 /* Don't remove global breakpoints here. They're removed on
2070 disconnection from the target. */
2073 /* If we're in breakpoints-always-inserted mode, have to remove
2074 them before detaching. */
2075 remove_breakpoints_pid (ptid_get_pid (inferior_ptid
));
2077 prepare_for_detach ();
2079 current_target
.to_detach (¤t_target
, args
, from_tty
);
2081 fprintf_unfiltered (gdb_stdlog
, "target_detach (%s, %d)\n",
2086 target_disconnect (char *args
, int from_tty
)
2088 /* If we're in breakpoints-always-inserted mode or if breakpoints
2089 are global across processes, we have to remove them before
2091 remove_breakpoints ();
2094 fprintf_unfiltered (gdb_stdlog
, "target_disconnect (%s, %d)\n",
2096 current_target
.to_disconnect (¤t_target
, args
, from_tty
);
2100 target_wait (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
2102 struct target_ops
*t
;
2103 ptid_t retval
= (current_target
.to_wait
) (¤t_target
, ptid
,
2108 char *status_string
;
2109 char *options_string
;
2111 status_string
= target_waitstatus_to_string (status
);
2112 options_string
= target_options_to_string (options
);
2113 fprintf_unfiltered (gdb_stdlog
,
2114 "target_wait (%d, status, options={%s})"
2116 ptid_get_pid (ptid
), options_string
,
2117 ptid_get_pid (retval
), status_string
);
2118 xfree (status_string
);
2119 xfree (options_string
);
2126 target_pid_to_str (ptid_t ptid
)
2128 return (*current_target
.to_pid_to_str
) (¤t_target
, ptid
);
2132 target_thread_name (struct thread_info
*info
)
2134 return current_target
.to_thread_name (¤t_target
, info
);
2138 target_resume (ptid_t ptid
, int step
, enum gdb_signal signal
)
2140 struct target_ops
*t
;
2142 target_dcache_invalidate ();
2144 current_target
.to_resume (¤t_target
, ptid
, step
, signal
);
2146 fprintf_unfiltered (gdb_stdlog
, "target_resume (%d, %s, %s)\n",
2147 ptid_get_pid (ptid
),
2148 step
? "step" : "continue",
2149 gdb_signal_to_name (signal
));
2151 registers_changed_ptid (ptid
);
2152 set_executing (ptid
, 1);
2153 set_running (ptid
, 1);
2154 clear_inline_frame_state (ptid
);
2158 target_pass_signals (int numsigs
, unsigned char *pass_signals
)
2164 fprintf_unfiltered (gdb_stdlog
, "target_pass_signals (%d, {",
2167 for (i
= 0; i
< numsigs
; i
++)
2168 if (pass_signals
[i
])
2169 fprintf_unfiltered (gdb_stdlog
, " %s",
2170 gdb_signal_to_name (i
));
2172 fprintf_unfiltered (gdb_stdlog
, " })\n");
2175 (*current_target
.to_pass_signals
) (¤t_target
, numsigs
, pass_signals
);
2179 target_program_signals (int numsigs
, unsigned char *program_signals
)
2185 fprintf_unfiltered (gdb_stdlog
, "target_program_signals (%d, {",
2188 for (i
= 0; i
< numsigs
; i
++)
2189 if (program_signals
[i
])
2190 fprintf_unfiltered (gdb_stdlog
, " %s",
2191 gdb_signal_to_name (i
));
2193 fprintf_unfiltered (gdb_stdlog
, " })\n");
2196 (*current_target
.to_program_signals
) (¤t_target
,
2197 numsigs
, program_signals
);
2201 default_follow_fork (struct target_ops
*self
, int follow_child
,
2204 /* Some target returned a fork event, but did not know how to follow it. */
2205 internal_error (__FILE__
, __LINE__
,
2206 _("could not find a target to follow fork"));
2209 /* Look through the list of possible targets for a target that can
2213 target_follow_fork (int follow_child
, int detach_fork
)
2215 int retval
= current_target
.to_follow_fork (¤t_target
,
2216 follow_child
, detach_fork
);
2219 fprintf_unfiltered (gdb_stdlog
,
2220 "target_follow_fork (%d, %d) = %d\n",
2221 follow_child
, detach_fork
, retval
);
2226 default_mourn_inferior (struct target_ops
*self
)
2228 internal_error (__FILE__
, __LINE__
,
2229 _("could not find a target to follow mourn inferior"));
2233 target_mourn_inferior (void)
2235 current_target
.to_mourn_inferior (¤t_target
);
2237 fprintf_unfiltered (gdb_stdlog
, "target_mourn_inferior ()\n");
2239 /* We no longer need to keep handles on any of the object files.
2240 Make sure to release them to avoid unnecessarily locking any
2241 of them while we're not actually debugging. */
2242 bfd_cache_close_all ();
2245 /* Look for a target which can describe architectural features, starting
2246 from TARGET. If we find one, return its description. */
2248 const struct target_desc
*
2249 target_read_description (struct target_ops
*target
)
2251 return target
->to_read_description (target
);
2254 /* This implements a basic search of memory, reading target memory and
2255 performing the search here (as opposed to performing the search in on the
2256 target side with, for example, gdbserver). */
2259 simple_search_memory (struct target_ops
*ops
,
2260 CORE_ADDR start_addr
, ULONGEST search_space_len
,
2261 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2262 CORE_ADDR
*found_addrp
)
2264 /* NOTE: also defined in find.c testcase. */
2265 #define SEARCH_CHUNK_SIZE 16000
2266 const unsigned chunk_size
= SEARCH_CHUNK_SIZE
;
2267 /* Buffer to hold memory contents for searching. */
2268 gdb_byte
*search_buf
;
2269 unsigned search_buf_size
;
2270 struct cleanup
*old_cleanups
;
2272 search_buf_size
= chunk_size
+ pattern_len
- 1;
2274 /* No point in trying to allocate a buffer larger than the search space. */
2275 if (search_space_len
< search_buf_size
)
2276 search_buf_size
= search_space_len
;
2278 search_buf
= malloc (search_buf_size
);
2279 if (search_buf
== NULL
)
2280 error (_("Unable to allocate memory to perform the search."));
2281 old_cleanups
= make_cleanup (free_current_contents
, &search_buf
);
2283 /* Prime the search buffer. */
2285 if (target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2286 search_buf
, start_addr
, search_buf_size
) != search_buf_size
)
2288 warning (_("Unable to access %s bytes of target "
2289 "memory at %s, halting search."),
2290 pulongest (search_buf_size
), hex_string (start_addr
));
2291 do_cleanups (old_cleanups
);
2295 /* Perform the search.
2297 The loop is kept simple by allocating [N + pattern-length - 1] bytes.
2298 When we've scanned N bytes we copy the trailing bytes to the start and
2299 read in another N bytes. */
2301 while (search_space_len
>= pattern_len
)
2303 gdb_byte
*found_ptr
;
2304 unsigned nr_search_bytes
= min (search_space_len
, search_buf_size
);
2306 found_ptr
= memmem (search_buf
, nr_search_bytes
,
2307 pattern
, pattern_len
);
2309 if (found_ptr
!= NULL
)
2311 CORE_ADDR found_addr
= start_addr
+ (found_ptr
- search_buf
);
2313 *found_addrp
= found_addr
;
2314 do_cleanups (old_cleanups
);
2318 /* Not found in this chunk, skip to next chunk. */
2320 /* Don't let search_space_len wrap here, it's unsigned. */
2321 if (search_space_len
>= chunk_size
)
2322 search_space_len
-= chunk_size
;
2324 search_space_len
= 0;
2326 if (search_space_len
>= pattern_len
)
2328 unsigned keep_len
= search_buf_size
- chunk_size
;
2329 CORE_ADDR read_addr
= start_addr
+ chunk_size
+ keep_len
;
2332 /* Copy the trailing part of the previous iteration to the front
2333 of the buffer for the next iteration. */
2334 gdb_assert (keep_len
== pattern_len
- 1);
2335 memcpy (search_buf
, search_buf
+ chunk_size
, keep_len
);
2337 nr_to_read
= min (search_space_len
- keep_len
, chunk_size
);
2339 if (target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2340 search_buf
+ keep_len
, read_addr
,
2341 nr_to_read
) != nr_to_read
)
2343 warning (_("Unable to access %s bytes of target "
2344 "memory at %s, halting search."),
2345 plongest (nr_to_read
),
2346 hex_string (read_addr
));
2347 do_cleanups (old_cleanups
);
2351 start_addr
+= chunk_size
;
2357 do_cleanups (old_cleanups
);
2361 /* Default implementation of memory-searching. */
2364 default_search_memory (struct target_ops
*self
,
2365 CORE_ADDR start_addr
, ULONGEST search_space_len
,
2366 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2367 CORE_ADDR
*found_addrp
)
2369 /* Start over from the top of the target stack. */
2370 return simple_search_memory (current_target
.beneath
,
2371 start_addr
, search_space_len
,
2372 pattern
, pattern_len
, found_addrp
);
2375 /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the
2376 sequence of bytes in PATTERN with length PATTERN_LEN.
2378 The result is 1 if found, 0 if not found, and -1 if there was an error
2379 requiring halting of the search (e.g. memory read error).
2380 If the pattern is found the address is recorded in FOUND_ADDRP. */
2383 target_search_memory (CORE_ADDR start_addr
, ULONGEST search_space_len
,
2384 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2385 CORE_ADDR
*found_addrp
)
2390 fprintf_unfiltered (gdb_stdlog
, "target_search_memory (%s, ...)\n",
2391 hex_string (start_addr
));
2393 found
= current_target
.to_search_memory (¤t_target
, start_addr
,
2395 pattern
, pattern_len
, found_addrp
);
2398 fprintf_unfiltered (gdb_stdlog
, " = %d\n", found
);
2403 /* Look through the currently pushed targets. If none of them will
2404 be able to restart the currently running process, issue an error
2408 target_require_runnable (void)
2410 struct target_ops
*t
;
2412 for (t
= target_stack
; t
!= NULL
; t
= t
->beneath
)
2414 /* If this target knows how to create a new program, then
2415 assume we will still be able to after killing the current
2416 one. Either killing and mourning will not pop T, or else
2417 find_default_run_target will find it again. */
2418 if (t
->to_create_inferior
!= NULL
)
2421 /* Do not worry about thread_stratum targets that can not
2422 create inferiors. Assume they will be pushed again if
2423 necessary, and continue to the process_stratum. */
2424 if (t
->to_stratum
== thread_stratum
2425 || t
->to_stratum
== arch_stratum
)
2428 error (_("The \"%s\" target does not support \"run\". "
2429 "Try \"help target\" or \"continue\"."),
2433 /* This function is only called if the target is running. In that
2434 case there should have been a process_stratum target and it
2435 should either know how to create inferiors, or not... */
2436 internal_error (__FILE__
, __LINE__
, _("No targets found"));
2439 /* Whether GDB is allowed to fall back to the default run target for
2440 "run", "attach", etc. when no target is connected yet. */
2441 static int auto_connect_native_target
= 1;
2444 show_auto_connect_native_target (struct ui_file
*file
, int from_tty
,
2445 struct cmd_list_element
*c
, const char *value
)
2447 fprintf_filtered (file
,
2448 _("Whether GDB may automatically connect to the "
2449 "native target is %s.\n"),
2453 /* Look through the list of possible targets for a target that can
2454 execute a run or attach command without any other data. This is
2455 used to locate the default process stratum.
2457 If DO_MESG is not NULL, the result is always valid (error() is
2458 called for errors); else, return NULL on error. */
2460 static struct target_ops
*
2461 find_default_run_target (char *do_mesg
)
2463 struct target_ops
*runable
= NULL
;
2465 if (auto_connect_native_target
)
2467 struct target_ops
**t
;
2470 for (t
= target_structs
; t
< target_structs
+ target_struct_size
;
2473 if ((*t
)->to_can_run
!= delegate_can_run
&& target_can_run (*t
))
2484 if (runable
== NULL
)
2487 error (_("Don't know how to %s. Try \"help target\"."), do_mesg
);
2498 find_attach_target (void)
2500 struct target_ops
*t
;
2502 /* If a target on the current stack can attach, use it. */
2503 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2505 if (t
->to_attach
!= NULL
)
2509 /* Otherwise, use the default run target for attaching. */
2511 t
= find_default_run_target ("attach");
2519 find_run_target (void)
2521 struct target_ops
*t
;
2523 /* If a target on the current stack can attach, use it. */
2524 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2526 if (t
->to_create_inferior
!= NULL
)
2530 /* Otherwise, use the default run target. */
2532 t
= find_default_run_target ("run");
2537 /* Implement the "info proc" command. */
2540 target_info_proc (char *args
, enum info_proc_what what
)
2542 struct target_ops
*t
;
2544 /* If we're already connected to something that can get us OS
2545 related data, use it. Otherwise, try using the native
2547 if (current_target
.to_stratum
>= process_stratum
)
2548 t
= current_target
.beneath
;
2550 t
= find_default_run_target (NULL
);
2552 for (; t
!= NULL
; t
= t
->beneath
)
2554 if (t
->to_info_proc
!= NULL
)
2556 t
->to_info_proc (t
, args
, what
);
2559 fprintf_unfiltered (gdb_stdlog
,
2560 "target_info_proc (\"%s\", %d)\n", args
, what
);
2570 find_default_supports_disable_randomization (struct target_ops
*self
)
2572 struct target_ops
*t
;
2574 t
= find_default_run_target (NULL
);
2575 if (t
&& t
->to_supports_disable_randomization
)
2576 return (t
->to_supports_disable_randomization
) (t
);
2581 target_supports_disable_randomization (void)
2583 struct target_ops
*t
;
2585 for (t
= ¤t_target
; t
!= NULL
; t
= t
->beneath
)
2586 if (t
->to_supports_disable_randomization
)
2587 return t
->to_supports_disable_randomization (t
);
2593 target_get_osdata (const char *type
)
2595 struct target_ops
*t
;
2597 /* If we're already connected to something that can get us OS
2598 related data, use it. Otherwise, try using the native
2600 if (current_target
.to_stratum
>= process_stratum
)
2601 t
= current_target
.beneath
;
2603 t
= find_default_run_target ("get OS data");
2608 return target_read_stralloc (t
, TARGET_OBJECT_OSDATA
, type
);
2611 /* Determine the current address space of thread PTID. */
2613 struct address_space
*
2614 target_thread_address_space (ptid_t ptid
)
2616 struct address_space
*aspace
;
2617 struct inferior
*inf
;
2618 struct target_ops
*t
;
2620 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2622 if (t
->to_thread_address_space
!= NULL
)
2624 aspace
= t
->to_thread_address_space (t
, ptid
);
2625 gdb_assert (aspace
);
2628 fprintf_unfiltered (gdb_stdlog
,
2629 "target_thread_address_space (%s) = %d\n",
2630 target_pid_to_str (ptid
),
2631 address_space_num (aspace
));
2636 /* Fall-back to the "main" address space of the inferior. */
2637 inf
= find_inferior_pid (ptid_get_pid (ptid
));
2639 if (inf
== NULL
|| inf
->aspace
== NULL
)
2640 internal_error (__FILE__
, __LINE__
,
2641 _("Can't determine the current "
2642 "address space of thread %s\n"),
2643 target_pid_to_str (ptid
));
2649 /* Target file operations. */
2651 static struct target_ops
*
2652 default_fileio_target (void)
2654 /* If we're already connected to something that can perform
2655 file I/O, use it. Otherwise, try using the native target. */
2656 if (current_target
.to_stratum
>= process_stratum
)
2657 return current_target
.beneath
;
2659 return find_default_run_target ("file I/O");
2662 /* Open FILENAME on the target, using FLAGS and MODE. Return a
2663 target file descriptor, or -1 if an error occurs (and set
2666 target_fileio_open (const char *filename
, int flags
, int mode
,
2669 struct target_ops
*t
;
2671 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
2673 if (t
->to_fileio_open
!= NULL
)
2675 int fd
= t
->to_fileio_open (t
, filename
, flags
, mode
, target_errno
);
2678 fprintf_unfiltered (gdb_stdlog
,
2679 "target_fileio_open (%s,0x%x,0%o) = %d (%d)\n",
2680 filename
, flags
, mode
,
2681 fd
, fd
!= -1 ? 0 : *target_errno
);
2686 *target_errno
= FILEIO_ENOSYS
;
2690 /* Write up to LEN bytes from WRITE_BUF to FD on the target.
2691 Return the number of bytes written, or -1 if an error occurs
2692 (and set *TARGET_ERRNO). */
2694 target_fileio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
2695 ULONGEST offset
, int *target_errno
)
2697 struct target_ops
*t
;
2699 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
2701 if (t
->to_fileio_pwrite
!= NULL
)
2703 int ret
= t
->to_fileio_pwrite (t
, fd
, write_buf
, len
, offset
,
2707 fprintf_unfiltered (gdb_stdlog
,
2708 "target_fileio_pwrite (%d,...,%d,%s) "
2710 fd
, len
, pulongest (offset
),
2711 ret
, ret
!= -1 ? 0 : *target_errno
);
2716 *target_errno
= FILEIO_ENOSYS
;
2720 /* Read up to LEN bytes FD on the target into READ_BUF.
2721 Return the number of bytes read, or -1 if an error occurs
2722 (and set *TARGET_ERRNO). */
2724 target_fileio_pread (int fd
, gdb_byte
*read_buf
, int len
,
2725 ULONGEST offset
, int *target_errno
)
2727 struct target_ops
*t
;
2729 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
2731 if (t
->to_fileio_pread
!= NULL
)
2733 int ret
= t
->to_fileio_pread (t
, fd
, read_buf
, len
, offset
,
2737 fprintf_unfiltered (gdb_stdlog
,
2738 "target_fileio_pread (%d,...,%d,%s) "
2740 fd
, len
, pulongest (offset
),
2741 ret
, ret
!= -1 ? 0 : *target_errno
);
2746 *target_errno
= FILEIO_ENOSYS
;
2750 /* Close FD on the target. Return 0, or -1 if an error occurs
2751 (and set *TARGET_ERRNO). */
2753 target_fileio_close (int fd
, int *target_errno
)
2755 struct target_ops
*t
;
2757 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
2759 if (t
->to_fileio_close
!= NULL
)
2761 int ret
= t
->to_fileio_close (t
, fd
, target_errno
);
2764 fprintf_unfiltered (gdb_stdlog
,
2765 "target_fileio_close (%d) = %d (%d)\n",
2766 fd
, ret
, ret
!= -1 ? 0 : *target_errno
);
2771 *target_errno
= FILEIO_ENOSYS
;
2775 /* Unlink FILENAME on the target. Return 0, or -1 if an error
2776 occurs (and set *TARGET_ERRNO). */
2778 target_fileio_unlink (const char *filename
, int *target_errno
)
2780 struct target_ops
*t
;
2782 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
2784 if (t
->to_fileio_unlink
!= NULL
)
2786 int ret
= t
->to_fileio_unlink (t
, filename
, target_errno
);
2789 fprintf_unfiltered (gdb_stdlog
,
2790 "target_fileio_unlink (%s) = %d (%d)\n",
2791 filename
, ret
, ret
!= -1 ? 0 : *target_errno
);
2796 *target_errno
= FILEIO_ENOSYS
;
2800 /* Read value of symbolic link FILENAME on the target. Return a
2801 null-terminated string allocated via xmalloc, or NULL if an error
2802 occurs (and set *TARGET_ERRNO). */
2804 target_fileio_readlink (const char *filename
, int *target_errno
)
2806 struct target_ops
*t
;
2808 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
2810 if (t
->to_fileio_readlink
!= NULL
)
2812 char *ret
= t
->to_fileio_readlink (t
, filename
, target_errno
);
2815 fprintf_unfiltered (gdb_stdlog
,
2816 "target_fileio_readlink (%s) = %s (%d)\n",
2817 filename
, ret
? ret
: "(nil)",
2818 ret
? 0 : *target_errno
);
2823 *target_errno
= FILEIO_ENOSYS
;
2828 target_fileio_close_cleanup (void *opaque
)
2830 int fd
= *(int *) opaque
;
2833 target_fileio_close (fd
, &target_errno
);
2836 /* Read target file FILENAME. Store the result in *BUF_P and
2837 return the size of the transferred data. PADDING additional bytes are
2838 available in *BUF_P. This is a helper function for
2839 target_fileio_read_alloc; see the declaration of that function for more
2843 target_fileio_read_alloc_1 (const char *filename
,
2844 gdb_byte
**buf_p
, int padding
)
2846 struct cleanup
*close_cleanup
;
2847 size_t buf_alloc
, buf_pos
;
2853 fd
= target_fileio_open (filename
, FILEIO_O_RDONLY
, 0700, &target_errno
);
2857 close_cleanup
= make_cleanup (target_fileio_close_cleanup
, &fd
);
2859 /* Start by reading up to 4K at a time. The target will throttle
2860 this number down if necessary. */
2862 buf
= xmalloc (buf_alloc
);
2866 n
= target_fileio_pread (fd
, &buf
[buf_pos
],
2867 buf_alloc
- buf_pos
- padding
, buf_pos
,
2871 /* An error occurred. */
2872 do_cleanups (close_cleanup
);
2878 /* Read all there was. */
2879 do_cleanups (close_cleanup
);
2889 /* If the buffer is filling up, expand it. */
2890 if (buf_alloc
< buf_pos
* 2)
2893 buf
= xrealloc (buf
, buf_alloc
);
2900 /* Read target file FILENAME. Store the result in *BUF_P and return
2901 the size of the transferred data. See the declaration in "target.h"
2902 function for more information about the return value. */
2905 target_fileio_read_alloc (const char *filename
, gdb_byte
**buf_p
)
2907 return target_fileio_read_alloc_1 (filename
, buf_p
, 0);
2910 /* Read target file FILENAME. The result is NUL-terminated and
2911 returned as a string, allocated using xmalloc. If an error occurs
2912 or the transfer is unsupported, NULL is returned. Empty objects
2913 are returned as allocated but empty strings. A warning is issued
2914 if the result contains any embedded NUL bytes. */
2917 target_fileio_read_stralloc (const char *filename
)
2921 LONGEST i
, transferred
;
2923 transferred
= target_fileio_read_alloc_1 (filename
, &buffer
, 1);
2924 bufstr
= (char *) buffer
;
2926 if (transferred
< 0)
2929 if (transferred
== 0)
2930 return xstrdup ("");
2932 bufstr
[transferred
] = 0;
2934 /* Check for embedded NUL bytes; but allow trailing NULs. */
2935 for (i
= strlen (bufstr
); i
< transferred
; i
++)
2938 warning (_("target file %s "
2939 "contained unexpected null characters"),
2949 default_region_ok_for_hw_watchpoint (struct target_ops
*self
,
2950 CORE_ADDR addr
, int len
)
2952 return (len
<= gdbarch_ptr_bit (target_gdbarch ()) / TARGET_CHAR_BIT
);
2956 default_watchpoint_addr_within_range (struct target_ops
*target
,
2958 CORE_ADDR start
, int length
)
2960 return addr
>= start
&& addr
< start
+ length
;
2963 static struct gdbarch
*
2964 default_thread_architecture (struct target_ops
*ops
, ptid_t ptid
)
2966 return target_gdbarch ();
2970 return_zero (struct target_ops
*ignore
)
2976 return_zero_has_execution (struct target_ops
*ignore
, ptid_t ignore2
)
2982 * Find the next target down the stack from the specified target.
2986 find_target_beneath (struct target_ops
*t
)
2994 find_target_at (enum strata stratum
)
2996 struct target_ops
*t
;
2998 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2999 if (t
->to_stratum
== stratum
)
3006 /* The inferior process has died. Long live the inferior! */
3009 generic_mourn_inferior (void)
3013 ptid
= inferior_ptid
;
3014 inferior_ptid
= null_ptid
;
3016 /* Mark breakpoints uninserted in case something tries to delete a
3017 breakpoint while we delete the inferior's threads (which would
3018 fail, since the inferior is long gone). */
3019 mark_breakpoints_out ();
3021 if (!ptid_equal (ptid
, null_ptid
))
3023 int pid
= ptid_get_pid (ptid
);
3024 exit_inferior (pid
);
3027 /* Note this wipes step-resume breakpoints, so needs to be done
3028 after exit_inferior, which ends up referencing the step-resume
3029 breakpoints through clear_thread_inferior_resources. */
3030 breakpoint_init_inferior (inf_exited
);
3032 registers_changed ();
3034 reopen_exec_file ();
3035 reinit_frame_cache ();
3037 if (deprecated_detach_hook
)
3038 deprecated_detach_hook ();
3041 /* Convert a normal process ID to a string. Returns the string in a
3045 normal_pid_to_str (ptid_t ptid
)
3047 static char buf
[32];
3049 xsnprintf (buf
, sizeof buf
, "process %d", ptid_get_pid (ptid
));
3054 default_pid_to_str (struct target_ops
*ops
, ptid_t ptid
)
3056 return normal_pid_to_str (ptid
);
3059 /* Error-catcher for target_find_memory_regions. */
3061 dummy_find_memory_regions (struct target_ops
*self
,
3062 find_memory_region_ftype ignore1
, void *ignore2
)
3064 error (_("Command not implemented for this target."));
3068 /* Error-catcher for target_make_corefile_notes. */
3070 dummy_make_corefile_notes (struct target_ops
*self
,
3071 bfd
*ignore1
, int *ignore2
)
3073 error (_("Command not implemented for this target."));
3077 /* Set up the handful of non-empty slots needed by the dummy target
3081 init_dummy_target (void)
3083 dummy_target
.to_shortname
= "None";
3084 dummy_target
.to_longname
= "None";
3085 dummy_target
.to_doc
= "";
3086 dummy_target
.to_supports_disable_randomization
3087 = find_default_supports_disable_randomization
;
3088 dummy_target
.to_stratum
= dummy_stratum
;
3089 dummy_target
.to_has_all_memory
= return_zero
;
3090 dummy_target
.to_has_memory
= return_zero
;
3091 dummy_target
.to_has_stack
= return_zero
;
3092 dummy_target
.to_has_registers
= return_zero
;
3093 dummy_target
.to_has_execution
= return_zero_has_execution
;
3094 dummy_target
.to_magic
= OPS_MAGIC
;
3096 install_dummy_methods (&dummy_target
);
3100 debug_to_open (char *args
, int from_tty
)
3102 debug_target
.to_open (args
, from_tty
);
3104 fprintf_unfiltered (gdb_stdlog
, "target_open (%s, %d)\n", args
, from_tty
);
3108 target_close (struct target_ops
*targ
)
3110 gdb_assert (!target_is_pushed (targ
));
3112 if (targ
->to_xclose
!= NULL
)
3113 targ
->to_xclose (targ
);
3114 else if (targ
->to_close
!= NULL
)
3115 targ
->to_close (targ
);
3118 fprintf_unfiltered (gdb_stdlog
, "target_close ()\n");
3122 target_thread_alive (ptid_t ptid
)
3126 retval
= current_target
.to_thread_alive (¤t_target
, ptid
);
3128 fprintf_unfiltered (gdb_stdlog
, "target_thread_alive (%d) = %d\n",
3129 ptid_get_pid (ptid
), retval
);
3135 target_find_new_threads (void)
3137 current_target
.to_find_new_threads (¤t_target
);
3139 fprintf_unfiltered (gdb_stdlog
, "target_find_new_threads ()\n");
3143 target_stop (ptid_t ptid
)
3147 warning (_("May not interrupt or stop the target, ignoring attempt"));
3151 (*current_target
.to_stop
) (¤t_target
, ptid
);
3155 debug_to_post_attach (struct target_ops
*self
, int pid
)
3157 debug_target
.to_post_attach (&debug_target
, pid
);
3159 fprintf_unfiltered (gdb_stdlog
, "target_post_attach (%d)\n", pid
);
3162 /* Concatenate ELEM to LIST, a comma separate list, and return the
3163 result. The LIST incoming argument is released. */
3166 str_comma_list_concat_elem (char *list
, const char *elem
)
3169 return xstrdup (elem
);
3171 return reconcat (list
, list
, ", ", elem
, (char *) NULL
);
3174 /* Helper for target_options_to_string. If OPT is present in
3175 TARGET_OPTIONS, append the OPT_STR (string version of OPT) in RET.
3176 Returns the new resulting string. OPT is removed from
3180 do_option (int *target_options
, char *ret
,
3181 int opt
, char *opt_str
)
3183 if ((*target_options
& opt
) != 0)
3185 ret
= str_comma_list_concat_elem (ret
, opt_str
);
3186 *target_options
&= ~opt
;
3193 target_options_to_string (int target_options
)
3197 #define DO_TARG_OPTION(OPT) \
3198 ret = do_option (&target_options, ret, OPT, #OPT)
3200 DO_TARG_OPTION (TARGET_WNOHANG
);
3202 if (target_options
!= 0)
3203 ret
= str_comma_list_concat_elem (ret
, "unknown???");
3211 debug_print_register (const char * func
,
3212 struct regcache
*regcache
, int regno
)
3214 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
3216 fprintf_unfiltered (gdb_stdlog
, "%s ", func
);
3217 if (regno
>= 0 && regno
< gdbarch_num_regs (gdbarch
)
3218 && gdbarch_register_name (gdbarch
, regno
) != NULL
3219 && gdbarch_register_name (gdbarch
, regno
)[0] != '\0')
3220 fprintf_unfiltered (gdb_stdlog
, "(%s)",
3221 gdbarch_register_name (gdbarch
, regno
));
3223 fprintf_unfiltered (gdb_stdlog
, "(%d)", regno
);
3224 if (regno
>= 0 && regno
< gdbarch_num_regs (gdbarch
))
3226 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
3227 int i
, size
= register_size (gdbarch
, regno
);
3228 gdb_byte buf
[MAX_REGISTER_SIZE
];
3230 regcache_raw_collect (regcache
, regno
, buf
);
3231 fprintf_unfiltered (gdb_stdlog
, " = ");
3232 for (i
= 0; i
< size
; i
++)
3234 fprintf_unfiltered (gdb_stdlog
, "%02x", buf
[i
]);
3236 if (size
<= sizeof (LONGEST
))
3238 ULONGEST val
= extract_unsigned_integer (buf
, size
, byte_order
);
3240 fprintf_unfiltered (gdb_stdlog
, " %s %s",
3241 core_addr_to_string_nz (val
), plongest (val
));
3244 fprintf_unfiltered (gdb_stdlog
, "\n");
3248 target_fetch_registers (struct regcache
*regcache
, int regno
)
3250 current_target
.to_fetch_registers (¤t_target
, regcache
, regno
);
3252 debug_print_register ("target_fetch_registers", regcache
, regno
);
3256 target_store_registers (struct regcache
*regcache
, int regno
)
3258 struct target_ops
*t
;
3260 if (!may_write_registers
)
3261 error (_("Writing to registers is not allowed (regno %d)"), regno
);
3263 current_target
.to_store_registers (¤t_target
, regcache
, regno
);
3266 debug_print_register ("target_store_registers", regcache
, regno
);
3271 target_core_of_thread (ptid_t ptid
)
3273 int retval
= current_target
.to_core_of_thread (¤t_target
, ptid
);
3276 fprintf_unfiltered (gdb_stdlog
,
3277 "target_core_of_thread (%d) = %d\n",
3278 ptid_get_pid (ptid
), retval
);
3283 simple_verify_memory (struct target_ops
*ops
,
3284 const gdb_byte
*data
, CORE_ADDR lma
, ULONGEST size
)
3286 LONGEST total_xfered
= 0;
3288 while (total_xfered
< size
)
3290 ULONGEST xfered_len
;
3291 enum target_xfer_status status
;
3293 ULONGEST howmuch
= min (sizeof (buf
), size
- total_xfered
);
3295 status
= target_xfer_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
3296 buf
, NULL
, lma
+ total_xfered
, howmuch
,
3298 if (status
== TARGET_XFER_OK
3299 && memcmp (data
+ total_xfered
, buf
, xfered_len
) == 0)
3301 total_xfered
+= xfered_len
;
3310 /* Default implementation of memory verification. */
3313 default_verify_memory (struct target_ops
*self
,
3314 const gdb_byte
*data
, CORE_ADDR memaddr
, ULONGEST size
)
3316 /* Start over from the top of the target stack. */
3317 return simple_verify_memory (current_target
.beneath
,
3318 data
, memaddr
, size
);
3322 target_verify_memory (const gdb_byte
*data
, CORE_ADDR memaddr
, ULONGEST size
)
3324 int retval
= current_target
.to_verify_memory (¤t_target
,
3325 data
, memaddr
, size
);
3328 fprintf_unfiltered (gdb_stdlog
,
3329 "target_verify_memory (%s, %s) = %d\n",
3330 paddress (target_gdbarch (), memaddr
),
3336 /* The documentation for this function is in its prototype declaration in
3340 target_insert_mask_watchpoint (CORE_ADDR addr
, CORE_ADDR mask
, int rw
)
3344 ret
= current_target
.to_insert_mask_watchpoint (¤t_target
,
3348 fprintf_unfiltered (gdb_stdlog
, "\
3349 target_insert_mask_watchpoint (%s, %s, %d) = %d\n",
3350 core_addr_to_string (addr
),
3351 core_addr_to_string (mask
), rw
, ret
);
3356 /* The documentation for this function is in its prototype declaration in
3360 target_remove_mask_watchpoint (CORE_ADDR addr
, CORE_ADDR mask
, int rw
)
3364 ret
= current_target
.to_remove_mask_watchpoint (¤t_target
,
3368 fprintf_unfiltered (gdb_stdlog
, "\
3369 target_remove_mask_watchpoint (%s, %s, %d) = %d\n",
3370 core_addr_to_string (addr
),
3371 core_addr_to_string (mask
), rw
, ret
);
3376 /* The documentation for this function is in its prototype declaration
3380 target_masked_watch_num_registers (CORE_ADDR addr
, CORE_ADDR mask
)
3382 return current_target
.to_masked_watch_num_registers (¤t_target
,
3386 /* The documentation for this function is in its prototype declaration
3390 target_ranged_break_num_registers (void)
3392 return current_target
.to_ranged_break_num_registers (¤t_target
);
3397 struct btrace_target_info
*
3398 target_enable_btrace (ptid_t ptid
)
3400 return current_target
.to_enable_btrace (¤t_target
, ptid
);
3406 target_disable_btrace (struct btrace_target_info
*btinfo
)
3408 current_target
.to_disable_btrace (¤t_target
, btinfo
);
3414 target_teardown_btrace (struct btrace_target_info
*btinfo
)
3416 current_target
.to_teardown_btrace (¤t_target
, btinfo
);
3422 target_read_btrace (VEC (btrace_block_s
) **btrace
,
3423 struct btrace_target_info
*btinfo
,
3424 enum btrace_read_type type
)
3426 return current_target
.to_read_btrace (¤t_target
, btrace
, btinfo
, type
);
3432 target_stop_recording (void)
3434 current_target
.to_stop_recording (¤t_target
);
3440 target_info_record (void)
3442 struct target_ops
*t
;
3444 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3445 if (t
->to_info_record
!= NULL
)
3447 t
->to_info_record (t
);
3457 target_save_record (const char *filename
)
3459 current_target
.to_save_record (¤t_target
, filename
);
3465 target_supports_delete_record (void)
3467 struct target_ops
*t
;
3469 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3470 if (t
->to_delete_record
!= NULL
)
3479 target_delete_record (void)
3481 current_target
.to_delete_record (¤t_target
);
3487 target_record_is_replaying (void)
3489 return current_target
.to_record_is_replaying (¤t_target
);
3495 target_goto_record_begin (void)
3497 current_target
.to_goto_record_begin (¤t_target
);
3503 target_goto_record_end (void)
3505 current_target
.to_goto_record_end (¤t_target
);
3511 target_goto_record (ULONGEST insn
)
3513 current_target
.to_goto_record (¤t_target
, insn
);
3519 target_insn_history (int size
, int flags
)
3521 current_target
.to_insn_history (¤t_target
, size
, flags
);
3527 target_insn_history_from (ULONGEST from
, int size
, int flags
)
3529 current_target
.to_insn_history_from (¤t_target
, from
, size
, flags
);
3535 target_insn_history_range (ULONGEST begin
, ULONGEST end
, int flags
)
3537 current_target
.to_insn_history_range (¤t_target
, begin
, end
, flags
);
3543 target_call_history (int size
, int flags
)
3545 current_target
.to_call_history (¤t_target
, size
, flags
);
3551 target_call_history_from (ULONGEST begin
, int size
, int flags
)
3553 current_target
.to_call_history_from (¤t_target
, begin
, size
, flags
);
3559 target_call_history_range (ULONGEST begin
, ULONGEST end
, int flags
)
3561 current_target
.to_call_history_range (¤t_target
, begin
, end
, flags
);
3565 debug_to_prepare_to_store (struct target_ops
*self
, struct regcache
*regcache
)
3567 debug_target
.to_prepare_to_store (&debug_target
, regcache
);
3569 fprintf_unfiltered (gdb_stdlog
, "target_prepare_to_store ()\n");
3574 const struct frame_unwind
*
3575 target_get_unwinder (void)
3577 return current_target
.to_get_unwinder (¤t_target
);
3582 const struct frame_unwind
*
3583 target_get_tailcall_unwinder (void)
3585 return current_target
.to_get_tailcall_unwinder (¤t_target
);
3588 /* Default implementation of to_decr_pc_after_break. */
3591 default_target_decr_pc_after_break (struct target_ops
*ops
,
3592 struct gdbarch
*gdbarch
)
3594 return gdbarch_decr_pc_after_break (gdbarch
);
3600 target_decr_pc_after_break (struct gdbarch
*gdbarch
)
3602 return current_target
.to_decr_pc_after_break (¤t_target
, gdbarch
);
3606 debug_to_files_info (struct target_ops
*target
)
3608 debug_target
.to_files_info (target
);
3610 fprintf_unfiltered (gdb_stdlog
, "target_files_info (xxx)\n");
3614 debug_to_insert_breakpoint (struct target_ops
*ops
, struct gdbarch
*gdbarch
,
3615 struct bp_target_info
*bp_tgt
)
3619 retval
= debug_target
.to_insert_breakpoint (&debug_target
, gdbarch
, bp_tgt
);
3621 fprintf_unfiltered (gdb_stdlog
,
3622 "target_insert_breakpoint (%s, xxx) = %ld\n",
3623 core_addr_to_string (bp_tgt
->placed_address
),
3624 (unsigned long) retval
);
3629 debug_to_remove_breakpoint (struct target_ops
*ops
, struct gdbarch
*gdbarch
,
3630 struct bp_target_info
*bp_tgt
)
3634 retval
= debug_target
.to_remove_breakpoint (&debug_target
, gdbarch
, bp_tgt
);
3636 fprintf_unfiltered (gdb_stdlog
,
3637 "target_remove_breakpoint (%s, xxx) = %ld\n",
3638 core_addr_to_string (bp_tgt
->placed_address
),
3639 (unsigned long) retval
);
3644 debug_to_can_use_hw_breakpoint (struct target_ops
*self
,
3645 int type
, int cnt
, int from_tty
)
3649 retval
= debug_target
.to_can_use_hw_breakpoint (&debug_target
,
3650 type
, cnt
, from_tty
);
3652 fprintf_unfiltered (gdb_stdlog
,
3653 "target_can_use_hw_breakpoint (%ld, %ld, %ld) = %ld\n",
3654 (unsigned long) type
,
3655 (unsigned long) cnt
,
3656 (unsigned long) from_tty
,
3657 (unsigned long) retval
);
3662 debug_to_region_ok_for_hw_watchpoint (struct target_ops
*self
,
3663 CORE_ADDR addr
, int len
)
3667 retval
= debug_target
.to_region_ok_for_hw_watchpoint (&debug_target
,
3670 fprintf_unfiltered (gdb_stdlog
,
3671 "target_region_ok_for_hw_watchpoint (%s, %ld) = %s\n",
3672 core_addr_to_string (addr
), (unsigned long) len
,
3673 core_addr_to_string (retval
));
3678 debug_to_can_accel_watchpoint_condition (struct target_ops
*self
,
3679 CORE_ADDR addr
, int len
, int rw
,
3680 struct expression
*cond
)
3684 retval
= debug_target
.to_can_accel_watchpoint_condition (&debug_target
,
3688 fprintf_unfiltered (gdb_stdlog
,
3689 "target_can_accel_watchpoint_condition "
3690 "(%s, %d, %d, %s) = %ld\n",
3691 core_addr_to_string (addr
), len
, rw
,
3692 host_address_to_string (cond
), (unsigned long) retval
);
3697 debug_to_stopped_by_watchpoint (struct target_ops
*ops
)
3701 retval
= debug_target
.to_stopped_by_watchpoint (&debug_target
);
3703 fprintf_unfiltered (gdb_stdlog
,
3704 "target_stopped_by_watchpoint () = %ld\n",
3705 (unsigned long) retval
);
3710 debug_to_stopped_data_address (struct target_ops
*target
, CORE_ADDR
*addr
)
3714 retval
= debug_target
.to_stopped_data_address (target
, addr
);
3716 fprintf_unfiltered (gdb_stdlog
,
3717 "target_stopped_data_address ([%s]) = %ld\n",
3718 core_addr_to_string (*addr
),
3719 (unsigned long)retval
);
3724 debug_to_watchpoint_addr_within_range (struct target_ops
*target
,
3726 CORE_ADDR start
, int length
)
3730 retval
= debug_target
.to_watchpoint_addr_within_range (target
, addr
,
3733 fprintf_filtered (gdb_stdlog
,
3734 "target_watchpoint_addr_within_range (%s, %s, %d) = %d\n",
3735 core_addr_to_string (addr
), core_addr_to_string (start
),
3741 debug_to_insert_hw_breakpoint (struct target_ops
*self
,
3742 struct gdbarch
*gdbarch
,
3743 struct bp_target_info
*bp_tgt
)
3747 retval
= debug_target
.to_insert_hw_breakpoint (&debug_target
,
3750 fprintf_unfiltered (gdb_stdlog
,
3751 "target_insert_hw_breakpoint (%s, xxx) = %ld\n",
3752 core_addr_to_string (bp_tgt
->placed_address
),
3753 (unsigned long) retval
);
3758 debug_to_remove_hw_breakpoint (struct target_ops
*self
,
3759 struct gdbarch
*gdbarch
,
3760 struct bp_target_info
*bp_tgt
)
3764 retval
= debug_target
.to_remove_hw_breakpoint (&debug_target
,
3767 fprintf_unfiltered (gdb_stdlog
,
3768 "target_remove_hw_breakpoint (%s, xxx) = %ld\n",
3769 core_addr_to_string (bp_tgt
->placed_address
),
3770 (unsigned long) retval
);
3775 debug_to_insert_watchpoint (struct target_ops
*self
,
3776 CORE_ADDR addr
, int len
, int type
,
3777 struct expression
*cond
)
3781 retval
= debug_target
.to_insert_watchpoint (&debug_target
,
3782 addr
, len
, type
, cond
);
3784 fprintf_unfiltered (gdb_stdlog
,
3785 "target_insert_watchpoint (%s, %d, %d, %s) = %ld\n",
3786 core_addr_to_string (addr
), len
, type
,
3787 host_address_to_string (cond
), (unsigned long) retval
);
3792 debug_to_remove_watchpoint (struct target_ops
*self
,
3793 CORE_ADDR addr
, int len
, int type
,
3794 struct expression
*cond
)
3798 retval
= debug_target
.to_remove_watchpoint (&debug_target
,
3799 addr
, len
, type
, cond
);
3801 fprintf_unfiltered (gdb_stdlog
,
3802 "target_remove_watchpoint (%s, %d, %d, %s) = %ld\n",
3803 core_addr_to_string (addr
), len
, type
,
3804 host_address_to_string (cond
), (unsigned long) retval
);
3809 debug_to_terminal_init (struct target_ops
*self
)
3811 debug_target
.to_terminal_init (&debug_target
);
3813 fprintf_unfiltered (gdb_stdlog
, "target_terminal_init ()\n");
3817 debug_to_terminal_inferior (struct target_ops
*self
)
3819 debug_target
.to_terminal_inferior (&debug_target
);
3821 fprintf_unfiltered (gdb_stdlog
, "target_terminal_inferior ()\n");
3825 debug_to_terminal_ours_for_output (struct target_ops
*self
)
3827 debug_target
.to_terminal_ours_for_output (&debug_target
);
3829 fprintf_unfiltered (gdb_stdlog
, "target_terminal_ours_for_output ()\n");
3833 debug_to_terminal_ours (struct target_ops
*self
)
3835 debug_target
.to_terminal_ours (&debug_target
);
3837 fprintf_unfiltered (gdb_stdlog
, "target_terminal_ours ()\n");
3841 debug_to_terminal_save_ours (struct target_ops
*self
)
3843 debug_target
.to_terminal_save_ours (&debug_target
);
3845 fprintf_unfiltered (gdb_stdlog
, "target_terminal_save_ours ()\n");
3849 debug_to_terminal_info (struct target_ops
*self
,
3850 const char *arg
, int from_tty
)
3852 debug_target
.to_terminal_info (&debug_target
, arg
, from_tty
);
3854 fprintf_unfiltered (gdb_stdlog
, "target_terminal_info (%s, %d)\n", arg
,
3859 debug_to_load (struct target_ops
*self
, char *args
, int from_tty
)
3861 debug_target
.to_load (&debug_target
, args
, from_tty
);
3863 fprintf_unfiltered (gdb_stdlog
, "target_load (%s, %d)\n", args
, from_tty
);
3867 debug_to_post_startup_inferior (struct target_ops
*self
, ptid_t ptid
)
3869 debug_target
.to_post_startup_inferior (&debug_target
, ptid
);
3871 fprintf_unfiltered (gdb_stdlog
, "target_post_startup_inferior (%d)\n",
3872 ptid_get_pid (ptid
));
3876 debug_to_insert_fork_catchpoint (struct target_ops
*self
, int pid
)
3880 retval
= debug_target
.to_insert_fork_catchpoint (&debug_target
, pid
);
3882 fprintf_unfiltered (gdb_stdlog
, "target_insert_fork_catchpoint (%d) = %d\n",
3889 debug_to_remove_fork_catchpoint (struct target_ops
*self
, int pid
)
3893 retval
= debug_target
.to_remove_fork_catchpoint (&debug_target
, pid
);
3895 fprintf_unfiltered (gdb_stdlog
, "target_remove_fork_catchpoint (%d) = %d\n",
3902 debug_to_insert_vfork_catchpoint (struct target_ops
*self
, int pid
)
3906 retval
= debug_target
.to_insert_vfork_catchpoint (&debug_target
, pid
);
3908 fprintf_unfiltered (gdb_stdlog
, "target_insert_vfork_catchpoint (%d) = %d\n",
3915 debug_to_remove_vfork_catchpoint (struct target_ops
*self
, int pid
)
3919 retval
= debug_target
.to_remove_vfork_catchpoint (&debug_target
, pid
);
3921 fprintf_unfiltered (gdb_stdlog
, "target_remove_vfork_catchpoint (%d) = %d\n",
3928 debug_to_insert_exec_catchpoint (struct target_ops
*self
, int pid
)
3932 retval
= debug_target
.to_insert_exec_catchpoint (&debug_target
, pid
);
3934 fprintf_unfiltered (gdb_stdlog
, "target_insert_exec_catchpoint (%d) = %d\n",
3941 debug_to_remove_exec_catchpoint (struct target_ops
*self
, int pid
)
3945 retval
= debug_target
.to_remove_exec_catchpoint (&debug_target
, pid
);
3947 fprintf_unfiltered (gdb_stdlog
, "target_remove_exec_catchpoint (%d) = %d\n",
3954 debug_to_has_exited (struct target_ops
*self
,
3955 int pid
, int wait_status
, int *exit_status
)
3959 has_exited
= debug_target
.to_has_exited (&debug_target
,
3960 pid
, wait_status
, exit_status
);
3962 fprintf_unfiltered (gdb_stdlog
, "target_has_exited (%d, %d, %d) = %d\n",
3963 pid
, wait_status
, *exit_status
, has_exited
);
3969 debug_to_can_run (struct target_ops
*self
)
3973 retval
= debug_target
.to_can_run (&debug_target
);
3975 fprintf_unfiltered (gdb_stdlog
, "target_can_run () = %d\n", retval
);
3980 static struct gdbarch
*
3981 debug_to_thread_architecture (struct target_ops
*ops
, ptid_t ptid
)
3983 struct gdbarch
*retval
;
3985 retval
= debug_target
.to_thread_architecture (ops
, ptid
);
3987 fprintf_unfiltered (gdb_stdlog
,
3988 "target_thread_architecture (%s) = %s [%s]\n",
3989 target_pid_to_str (ptid
),
3990 host_address_to_string (retval
),
3991 gdbarch_bfd_arch_info (retval
)->printable_name
);
3996 debug_to_stop (struct target_ops
*self
, ptid_t ptid
)
3998 debug_target
.to_stop (&debug_target
, ptid
);
4000 fprintf_unfiltered (gdb_stdlog
, "target_stop (%s)\n",
4001 target_pid_to_str (ptid
));
4005 debug_to_rcmd (struct target_ops
*self
, char *command
,
4006 struct ui_file
*outbuf
)
4008 debug_target
.to_rcmd (&debug_target
, command
, outbuf
);
4009 fprintf_unfiltered (gdb_stdlog
, "target_rcmd (%s, ...)\n", command
);
4013 debug_to_pid_to_exec_file (struct target_ops
*self
, int pid
)
4017 exec_file
= debug_target
.to_pid_to_exec_file (&debug_target
, pid
);
4019 fprintf_unfiltered (gdb_stdlog
, "target_pid_to_exec_file (%d) = %s\n",
4026 setup_target_debug (void)
4028 memcpy (&debug_target
, ¤t_target
, sizeof debug_target
);
4030 current_target
.to_open
= debug_to_open
;
4031 current_target
.to_post_attach
= debug_to_post_attach
;
4032 current_target
.to_prepare_to_store
= debug_to_prepare_to_store
;
4033 current_target
.to_files_info
= debug_to_files_info
;
4034 current_target
.to_insert_breakpoint
= debug_to_insert_breakpoint
;
4035 current_target
.to_remove_breakpoint
= debug_to_remove_breakpoint
;
4036 current_target
.to_can_use_hw_breakpoint
= debug_to_can_use_hw_breakpoint
;
4037 current_target
.to_insert_hw_breakpoint
= debug_to_insert_hw_breakpoint
;
4038 current_target
.to_remove_hw_breakpoint
= debug_to_remove_hw_breakpoint
;
4039 current_target
.to_insert_watchpoint
= debug_to_insert_watchpoint
;
4040 current_target
.to_remove_watchpoint
= debug_to_remove_watchpoint
;
4041 current_target
.to_stopped_by_watchpoint
= debug_to_stopped_by_watchpoint
;
4042 current_target
.to_stopped_data_address
= debug_to_stopped_data_address
;
4043 current_target
.to_watchpoint_addr_within_range
4044 = debug_to_watchpoint_addr_within_range
;
4045 current_target
.to_region_ok_for_hw_watchpoint
4046 = debug_to_region_ok_for_hw_watchpoint
;
4047 current_target
.to_can_accel_watchpoint_condition
4048 = debug_to_can_accel_watchpoint_condition
;
4049 current_target
.to_terminal_init
= debug_to_terminal_init
;
4050 current_target
.to_terminal_inferior
= debug_to_terminal_inferior
;
4051 current_target
.to_terminal_ours_for_output
4052 = debug_to_terminal_ours_for_output
;
4053 current_target
.to_terminal_ours
= debug_to_terminal_ours
;
4054 current_target
.to_terminal_save_ours
= debug_to_terminal_save_ours
;
4055 current_target
.to_terminal_info
= debug_to_terminal_info
;
4056 current_target
.to_load
= debug_to_load
;
4057 current_target
.to_post_startup_inferior
= debug_to_post_startup_inferior
;
4058 current_target
.to_insert_fork_catchpoint
= debug_to_insert_fork_catchpoint
;
4059 current_target
.to_remove_fork_catchpoint
= debug_to_remove_fork_catchpoint
;
4060 current_target
.to_insert_vfork_catchpoint
= debug_to_insert_vfork_catchpoint
;
4061 current_target
.to_remove_vfork_catchpoint
= debug_to_remove_vfork_catchpoint
;
4062 current_target
.to_insert_exec_catchpoint
= debug_to_insert_exec_catchpoint
;
4063 current_target
.to_remove_exec_catchpoint
= debug_to_remove_exec_catchpoint
;
4064 current_target
.to_has_exited
= debug_to_has_exited
;
4065 current_target
.to_can_run
= debug_to_can_run
;
4066 current_target
.to_stop
= debug_to_stop
;
4067 current_target
.to_rcmd
= debug_to_rcmd
;
4068 current_target
.to_pid_to_exec_file
= debug_to_pid_to_exec_file
;
4069 current_target
.to_thread_architecture
= debug_to_thread_architecture
;
4073 static char targ_desc
[] =
4074 "Names of targets and files being debugged.\nShows the entire \
4075 stack of targets currently in use (including the exec-file,\n\
4076 core-file, and process, if any), as well as the symbol file name.";
4079 default_rcmd (struct target_ops
*self
, char *command
, struct ui_file
*output
)
4081 error (_("\"monitor\" command not supported by this target."));
4085 do_monitor_command (char *cmd
,
4088 target_rcmd (cmd
, gdb_stdtarg
);
4091 /* Print the name of each layers of our target stack. */
4094 maintenance_print_target_stack (char *cmd
, int from_tty
)
4096 struct target_ops
*t
;
4098 printf_filtered (_("The current target stack is:\n"));
4100 for (t
= target_stack
; t
!= NULL
; t
= t
->beneath
)
4102 printf_filtered (" - %s (%s)\n", t
->to_shortname
, t
->to_longname
);
4106 /* Controls if async mode is permitted. */
4107 int target_async_permitted
= 0;
4109 /* The set command writes to this variable. If the inferior is
4110 executing, target_async_permitted is *not* updated. */
4111 static int target_async_permitted_1
= 0;
4114 set_target_async_command (char *args
, int from_tty
,
4115 struct cmd_list_element
*c
)
4117 if (have_live_inferiors ())
4119 target_async_permitted_1
= target_async_permitted
;
4120 error (_("Cannot change this setting while the inferior is running."));
4123 target_async_permitted
= target_async_permitted_1
;
4127 show_target_async_command (struct ui_file
*file
, int from_tty
,
4128 struct cmd_list_element
*c
,
4131 fprintf_filtered (file
,
4132 _("Controlling the inferior in "
4133 "asynchronous mode is %s.\n"), value
);
4136 /* Temporary copies of permission settings. */
4138 static int may_write_registers_1
= 1;
4139 static int may_write_memory_1
= 1;
4140 static int may_insert_breakpoints_1
= 1;
4141 static int may_insert_tracepoints_1
= 1;
4142 static int may_insert_fast_tracepoints_1
= 1;
4143 static int may_stop_1
= 1;
4145 /* Make the user-set values match the real values again. */
4148 update_target_permissions (void)
4150 may_write_registers_1
= may_write_registers
;
4151 may_write_memory_1
= may_write_memory
;
4152 may_insert_breakpoints_1
= may_insert_breakpoints
;
4153 may_insert_tracepoints_1
= may_insert_tracepoints
;
4154 may_insert_fast_tracepoints_1
= may_insert_fast_tracepoints
;
4155 may_stop_1
= may_stop
;
4158 /* The one function handles (most of) the permission flags in the same
4162 set_target_permissions (char *args
, int from_tty
,
4163 struct cmd_list_element
*c
)
4165 if (target_has_execution
)
4167 update_target_permissions ();
4168 error (_("Cannot change this setting while the inferior is running."));
4171 /* Make the real values match the user-changed values. */
4172 may_write_registers
= may_write_registers_1
;
4173 may_insert_breakpoints
= may_insert_breakpoints_1
;
4174 may_insert_tracepoints
= may_insert_tracepoints_1
;
4175 may_insert_fast_tracepoints
= may_insert_fast_tracepoints_1
;
4176 may_stop
= may_stop_1
;
4177 update_observer_mode ();
4180 /* Set memory write permission independently of observer mode. */
4183 set_write_memory_permission (char *args
, int from_tty
,
4184 struct cmd_list_element
*c
)
4186 /* Make the real values match the user-changed values. */
4187 may_write_memory
= may_write_memory_1
;
4188 update_observer_mode ();
4193 initialize_targets (void)
4195 init_dummy_target ();
4196 push_target (&dummy_target
);
4198 add_info ("target", target_info
, targ_desc
);
4199 add_info ("files", target_info
, targ_desc
);
4201 add_setshow_zuinteger_cmd ("target", class_maintenance
, &targetdebug
, _("\
4202 Set target debugging."), _("\
4203 Show target debugging."), _("\
4204 When non-zero, target debugging is enabled. Higher numbers are more\n\
4205 verbose. Changes do not take effect until the next \"run\" or \"target\"\n\
4209 &setdebuglist
, &showdebuglist
);
4211 add_setshow_boolean_cmd ("trust-readonly-sections", class_support
,
4212 &trust_readonly
, _("\
4213 Set mode for reading from readonly sections."), _("\
4214 Show mode for reading from readonly sections."), _("\
4215 When this mode is on, memory reads from readonly sections (such as .text)\n\
4216 will be read from the object file instead of from the target. This will\n\
4217 result in significant performance improvement for remote targets."),
4219 show_trust_readonly
,
4220 &setlist
, &showlist
);
4222 add_com ("monitor", class_obscure
, do_monitor_command
,
4223 _("Send a command to the remote monitor (remote targets only)."));
4225 add_cmd ("target-stack", class_maintenance
, maintenance_print_target_stack
,
4226 _("Print the name of each layer of the internal target stack."),
4227 &maintenanceprintlist
);
4229 add_setshow_boolean_cmd ("target-async", no_class
,
4230 &target_async_permitted_1
, _("\
4231 Set whether gdb controls the inferior in asynchronous mode."), _("\
4232 Show whether gdb controls the inferior in asynchronous mode."), _("\
4233 Tells gdb whether to control the inferior in asynchronous mode."),
4234 set_target_async_command
,
4235 show_target_async_command
,
4239 add_setshow_boolean_cmd ("may-write-registers", class_support
,
4240 &may_write_registers_1
, _("\
4241 Set permission to write into registers."), _("\
4242 Show permission to write into registers."), _("\
4243 When this permission is on, GDB may write into the target's registers.\n\
4244 Otherwise, any sort of write attempt will result in an error."),
4245 set_target_permissions
, NULL
,
4246 &setlist
, &showlist
);
4248 add_setshow_boolean_cmd ("may-write-memory", class_support
,
4249 &may_write_memory_1
, _("\
4250 Set permission to write into target memory."), _("\
4251 Show permission to write into target memory."), _("\
4252 When this permission is on, GDB may write into the target's memory.\n\
4253 Otherwise, any sort of write attempt will result in an error."),
4254 set_write_memory_permission
, NULL
,
4255 &setlist
, &showlist
);
4257 add_setshow_boolean_cmd ("may-insert-breakpoints", class_support
,
4258 &may_insert_breakpoints_1
, _("\
4259 Set permission to insert breakpoints in the target."), _("\
4260 Show permission to insert breakpoints in the target."), _("\
4261 When this permission is on, GDB may insert breakpoints in the program.\n\
4262 Otherwise, any sort of insertion attempt will result in an error."),
4263 set_target_permissions
, NULL
,
4264 &setlist
, &showlist
);
4266 add_setshow_boolean_cmd ("may-insert-tracepoints", class_support
,
4267 &may_insert_tracepoints_1
, _("\
4268 Set permission to insert tracepoints in the target."), _("\
4269 Show permission to insert tracepoints in the target."), _("\
4270 When this permission is on, GDB may insert tracepoints in the program.\n\
4271 Otherwise, any sort of insertion attempt will result in an error."),
4272 set_target_permissions
, NULL
,
4273 &setlist
, &showlist
);
4275 add_setshow_boolean_cmd ("may-insert-fast-tracepoints", class_support
,
4276 &may_insert_fast_tracepoints_1
, _("\
4277 Set permission to insert fast tracepoints in the target."), _("\
4278 Show permission to insert fast tracepoints in the target."), _("\
4279 When this permission is on, GDB may insert fast tracepoints.\n\
4280 Otherwise, any sort of insertion attempt will result in an error."),
4281 set_target_permissions
, NULL
,
4282 &setlist
, &showlist
);
4284 add_setshow_boolean_cmd ("may-interrupt", class_support
,
4286 Set permission to interrupt or signal the target."), _("\
4287 Show permission to interrupt or signal the target."), _("\
4288 When this permission is on, GDB may interrupt/stop the target's execution.\n\
4289 Otherwise, any attempt to interrupt or stop will be ignored."),
4290 set_target_permissions
, NULL
,
4291 &setlist
, &showlist
);
4293 add_setshow_boolean_cmd ("auto-connect-native-target", class_support
,
4294 &auto_connect_native_target
, _("\
4295 Set whether GDB may automatically connect to the native target."), _("\
4296 Show whether GDB may automatically connect to the native target."), _("\
4297 When on, and GDB is not connected to a target yet, GDB\n\
4298 attempts \"run\" and other commands with the native target."),
4299 NULL
, show_auto_connect_native_target
,
4300 &setlist
, &showlist
);