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"
37 #include "gdb_assert.h"
39 #include "exceptions.h"
40 #include "target-descriptions.h"
41 #include "gdbthread.h"
44 #include "inline-frame.h"
45 #include "tracepoint.h"
46 #include "gdb/fileio.h"
50 static void target_info (char *, int);
52 static void default_terminal_info (struct target_ops
*, const char *, int);
54 static int default_watchpoint_addr_within_range (struct target_ops
*,
55 CORE_ADDR
, CORE_ADDR
, int);
57 static int default_region_ok_for_hw_watchpoint (struct target_ops
*,
60 static void default_rcmd (struct target_ops
*, char *, struct ui_file
*);
62 static ptid_t
default_get_ada_task_ptid (struct target_ops
*self
,
65 static int default_follow_fork (struct target_ops
*self
, int follow_child
,
68 static void default_mourn_inferior (struct target_ops
*self
);
70 static int default_search_memory (struct target_ops
*ops
,
72 ULONGEST search_space_len
,
73 const gdb_byte
*pattern
,
75 CORE_ADDR
*found_addrp
);
77 static int default_verify_memory (struct target_ops
*self
,
79 CORE_ADDR memaddr
, ULONGEST size
);
81 static void tcomplain (void) ATTRIBUTE_NORETURN
;
83 static int return_zero (struct target_ops
*);
85 static int return_zero_has_execution (struct target_ops
*, ptid_t
);
87 static void target_command (char *, int);
89 static struct target_ops
*find_default_run_target (char *);
91 static struct gdbarch
*default_thread_architecture (struct target_ops
*ops
,
94 static int dummy_find_memory_regions (struct target_ops
*self
,
95 find_memory_region_ftype ignore1
,
98 static char *dummy_make_corefile_notes (struct target_ops
*self
,
99 bfd
*ignore1
, int *ignore2
);
101 static char *default_pid_to_str (struct target_ops
*ops
, ptid_t ptid
);
103 static enum exec_direction_kind default_execution_direction
104 (struct target_ops
*self
);
106 static CORE_ADDR
default_target_decr_pc_after_break (struct target_ops
*ops
,
107 struct gdbarch
*gdbarch
);
109 #include "target-delegates.c"
111 static void init_dummy_target (void);
113 static struct target_ops debug_target
;
115 static void debug_to_open (char *, int);
117 static void debug_to_prepare_to_store (struct target_ops
*self
,
120 static void debug_to_files_info (struct target_ops
*);
122 static int debug_to_insert_breakpoint (struct target_ops
*, struct gdbarch
*,
123 struct bp_target_info
*);
125 static int debug_to_remove_breakpoint (struct target_ops
*, struct gdbarch
*,
126 struct bp_target_info
*);
128 static int debug_to_can_use_hw_breakpoint (struct target_ops
*self
,
131 static int debug_to_insert_hw_breakpoint (struct target_ops
*self
,
133 struct bp_target_info
*);
135 static int debug_to_remove_hw_breakpoint (struct target_ops
*self
,
137 struct bp_target_info
*);
139 static int debug_to_insert_watchpoint (struct target_ops
*self
,
141 struct expression
*);
143 static int debug_to_remove_watchpoint (struct target_ops
*self
,
145 struct expression
*);
147 static int debug_to_stopped_data_address (struct target_ops
*, CORE_ADDR
*);
149 static int debug_to_watchpoint_addr_within_range (struct target_ops
*,
150 CORE_ADDR
, CORE_ADDR
, int);
152 static int debug_to_region_ok_for_hw_watchpoint (struct target_ops
*self
,
155 static int debug_to_can_accel_watchpoint_condition (struct target_ops
*self
,
157 struct expression
*);
159 static void debug_to_terminal_init (struct target_ops
*self
);
161 static void debug_to_terminal_inferior (struct target_ops
*self
);
163 static void debug_to_terminal_ours_for_output (struct target_ops
*self
);
165 static void debug_to_terminal_save_ours (struct target_ops
*self
);
167 static void debug_to_terminal_ours (struct target_ops
*self
);
169 static void debug_to_load (struct target_ops
*self
, char *, int);
171 static int debug_to_can_run (struct target_ops
*self
);
173 static void debug_to_stop (struct target_ops
*self
, ptid_t
);
175 /* Pointer to array of target architecture structures; the size of the
176 array; the current index into the array; the allocated size of the
178 struct target_ops
**target_structs
;
179 unsigned target_struct_size
;
180 unsigned target_struct_allocsize
;
181 #define DEFAULT_ALLOCSIZE 10
183 /* The initial current target, so that there is always a semi-valid
186 static struct target_ops dummy_target
;
188 /* Top of target stack. */
190 static struct target_ops
*target_stack
;
192 /* The target structure we are currently using to talk to a process
193 or file or whatever "inferior" we have. */
195 struct target_ops current_target
;
197 /* Command list for target. */
199 static struct cmd_list_element
*targetlist
= NULL
;
201 /* Nonzero if we should trust readonly sections from the
202 executable when reading memory. */
204 static int trust_readonly
= 0;
206 /* Nonzero if we should show true memory content including
207 memory breakpoint inserted by gdb. */
209 static int show_memory_breakpoints
= 0;
211 /* These globals control whether GDB attempts to perform these
212 operations; they are useful for targets that need to prevent
213 inadvertant disruption, such as in non-stop mode. */
215 int may_write_registers
= 1;
217 int may_write_memory
= 1;
219 int may_insert_breakpoints
= 1;
221 int may_insert_tracepoints
= 1;
223 int may_insert_fast_tracepoints
= 1;
227 /* Non-zero if we want to see trace of target level stuff. */
229 static unsigned int targetdebug
= 0;
231 show_targetdebug (struct ui_file
*file
, int from_tty
,
232 struct cmd_list_element
*c
, const char *value
)
234 fprintf_filtered (file
, _("Target debugging is %s.\n"), value
);
237 static void setup_target_debug (void);
239 /* The user just typed 'target' without the name of a target. */
242 target_command (char *arg
, int from_tty
)
244 fputs_filtered ("Argument required (target name). Try `help target'\n",
248 /* Default target_has_* methods for process_stratum targets. */
251 default_child_has_all_memory (struct target_ops
*ops
)
253 /* If no inferior selected, then we can't read memory here. */
254 if (ptid_equal (inferior_ptid
, null_ptid
))
261 default_child_has_memory (struct target_ops
*ops
)
263 /* If no inferior selected, then we can't read memory here. */
264 if (ptid_equal (inferior_ptid
, null_ptid
))
271 default_child_has_stack (struct target_ops
*ops
)
273 /* If no inferior selected, there's no stack. */
274 if (ptid_equal (inferior_ptid
, null_ptid
))
281 default_child_has_registers (struct target_ops
*ops
)
283 /* Can't read registers from no inferior. */
284 if (ptid_equal (inferior_ptid
, null_ptid
))
291 default_child_has_execution (struct target_ops
*ops
, ptid_t the_ptid
)
293 /* If there's no thread selected, then we can't make it run through
295 if (ptid_equal (the_ptid
, null_ptid
))
303 target_has_all_memory_1 (void)
305 struct target_ops
*t
;
307 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
308 if (t
->to_has_all_memory (t
))
315 target_has_memory_1 (void)
317 struct target_ops
*t
;
319 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
320 if (t
->to_has_memory (t
))
327 target_has_stack_1 (void)
329 struct target_ops
*t
;
331 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
332 if (t
->to_has_stack (t
))
339 target_has_registers_1 (void)
341 struct target_ops
*t
;
343 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
344 if (t
->to_has_registers (t
))
351 target_has_execution_1 (ptid_t the_ptid
)
353 struct target_ops
*t
;
355 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
356 if (t
->to_has_execution (t
, the_ptid
))
363 target_has_execution_current (void)
365 return target_has_execution_1 (inferior_ptid
);
368 /* Complete initialization of T. This ensures that various fields in
369 T are set, if needed by the target implementation. */
372 complete_target_initialization (struct target_ops
*t
)
374 /* Provide default values for all "must have" methods. */
376 if (t
->to_has_all_memory
== NULL
)
377 t
->to_has_all_memory
= return_zero
;
379 if (t
->to_has_memory
== NULL
)
380 t
->to_has_memory
= return_zero
;
382 if (t
->to_has_stack
== NULL
)
383 t
->to_has_stack
= return_zero
;
385 if (t
->to_has_registers
== NULL
)
386 t
->to_has_registers
= return_zero
;
388 if (t
->to_has_execution
== NULL
)
389 t
->to_has_execution
= return_zero_has_execution
;
391 /* These methods can be called on an unpushed target and so require
392 a default implementation if the target might plausibly be the
393 default run target. */
394 gdb_assert (t
->to_can_run
== NULL
|| (t
->to_can_async_p
!= NULL
395 && t
->to_supports_non_stop
!= NULL
));
397 install_delegators (t
);
400 /* Add possible target architecture T to the list and add a new
401 command 'target T->to_shortname'. Set COMPLETER as the command's
402 completer if not NULL. */
405 add_target_with_completer (struct target_ops
*t
,
406 completer_ftype
*completer
)
408 struct cmd_list_element
*c
;
410 complete_target_initialization (t
);
414 target_struct_allocsize
= DEFAULT_ALLOCSIZE
;
415 target_structs
= (struct target_ops
**) xmalloc
416 (target_struct_allocsize
* sizeof (*target_structs
));
418 if (target_struct_size
>= target_struct_allocsize
)
420 target_struct_allocsize
*= 2;
421 target_structs
= (struct target_ops
**)
422 xrealloc ((char *) target_structs
,
423 target_struct_allocsize
* sizeof (*target_structs
));
425 target_structs
[target_struct_size
++] = t
;
427 if (targetlist
== NULL
)
428 add_prefix_cmd ("target", class_run
, target_command
, _("\
429 Connect to a target machine or process.\n\
430 The first argument is the type or protocol of the target machine.\n\
431 Remaining arguments are interpreted by the target protocol. For more\n\
432 information on the arguments for a particular protocol, type\n\
433 `help target ' followed by the protocol name."),
434 &targetlist
, "target ", 0, &cmdlist
);
435 c
= add_cmd (t
->to_shortname
, no_class
, t
->to_open
, t
->to_doc
,
437 if (completer
!= NULL
)
438 set_cmd_completer (c
, completer
);
441 /* Add a possible target architecture to the list. */
444 add_target (struct target_ops
*t
)
446 add_target_with_completer (t
, NULL
);
452 add_deprecated_target_alias (struct target_ops
*t
, char *alias
)
454 struct cmd_list_element
*c
;
457 /* If we use add_alias_cmd, here, we do not get the deprecated warning,
459 c
= add_cmd (alias
, no_class
, t
->to_open
, t
->to_doc
, &targetlist
);
460 alt
= xstrprintf ("target %s", t
->to_shortname
);
461 deprecate_cmd (c
, alt
);
470 fprintf_unfiltered (gdb_stdlog
, "target_kill ()\n");
472 current_target
.to_kill (¤t_target
);
476 target_load (char *arg
, int from_tty
)
478 target_dcache_invalidate ();
479 (*current_target
.to_load
) (¤t_target
, arg
, from_tty
);
483 target_terminal_inferior (void)
485 /* A background resume (``run&'') should leave GDB in control of the
486 terminal. Use target_can_async_p, not target_is_async_p, since at
487 this point the target is not async yet. However, if sync_execution
488 is not set, we know it will become async prior to resume. */
489 if (target_can_async_p () && !sync_execution
)
492 /* If GDB is resuming the inferior in the foreground, install
493 inferior's terminal modes. */
494 (*current_target
.to_terminal_inferior
) (¤t_target
);
500 error (_("You can't do that when your target is `%s'"),
501 current_target
.to_shortname
);
507 error (_("You can't do that without a process to debug."));
511 default_terminal_info (struct target_ops
*self
, const char *args
, int from_tty
)
513 printf_unfiltered (_("No saved terminal information.\n"));
516 /* A default implementation for the to_get_ada_task_ptid target method.
518 This function builds the PTID by using both LWP and TID as part of
519 the PTID lwp and tid elements. The pid used is the pid of the
523 default_get_ada_task_ptid (struct target_ops
*self
, long lwp
, long tid
)
525 return ptid_build (ptid_get_pid (inferior_ptid
), lwp
, tid
);
528 static enum exec_direction_kind
529 default_execution_direction (struct target_ops
*self
)
531 if (!target_can_execute_reverse
)
533 else if (!target_can_async_p ())
536 gdb_assert_not_reached ("\
537 to_execution_direction must be implemented for reverse async");
540 /* Go through the target stack from top to bottom, copying over zero
541 entries in current_target, then filling in still empty entries. In
542 effect, we are doing class inheritance through the pushed target
545 NOTE: cagney/2003-10-17: The problem with this inheritance, as it
546 is currently implemented, is that it discards any knowledge of
547 which target an inherited method originally belonged to.
548 Consequently, new new target methods should instead explicitly and
549 locally search the target stack for the target that can handle the
553 update_current_target (void)
555 struct target_ops
*t
;
557 /* First, reset current's contents. */
558 memset (¤t_target
, 0, sizeof (current_target
));
560 /* Install the delegators. */
561 install_delegators (¤t_target
);
563 current_target
.to_stratum
= target_stack
->to_stratum
;
565 #define INHERIT(FIELD, TARGET) \
566 if (!current_target.FIELD) \
567 current_target.FIELD = (TARGET)->FIELD
569 /* Do not add any new INHERITs here. Instead, use the delegation
570 mechanism provided by make-target-delegates. */
571 for (t
= target_stack
; t
; t
= t
->beneath
)
573 INHERIT (to_shortname
, t
);
574 INHERIT (to_longname
, t
);
575 INHERIT (to_attach_no_wait
, t
);
576 INHERIT (to_have_steppable_watchpoint
, t
);
577 INHERIT (to_have_continuable_watchpoint
, t
);
578 INHERIT (to_has_thread_control
, t
);
582 /* Finally, position the target-stack beneath the squashed
583 "current_target". That way code looking for a non-inherited
584 target method can quickly and simply find it. */
585 current_target
.beneath
= target_stack
;
588 setup_target_debug ();
591 /* Push a new target type into the stack of the existing target accessors,
592 possibly superseding some of the existing accessors.
594 Rather than allow an empty stack, we always have the dummy target at
595 the bottom stratum, so we can call the function vectors without
599 push_target (struct target_ops
*t
)
601 struct target_ops
**cur
;
603 /* Check magic number. If wrong, it probably means someone changed
604 the struct definition, but not all the places that initialize one. */
605 if (t
->to_magic
!= OPS_MAGIC
)
607 fprintf_unfiltered (gdb_stderr
,
608 "Magic number of %s target struct wrong\n",
610 internal_error (__FILE__
, __LINE__
,
611 _("failed internal consistency check"));
614 /* Find the proper stratum to install this target in. */
615 for (cur
= &target_stack
; (*cur
) != NULL
; cur
= &(*cur
)->beneath
)
617 if ((int) (t
->to_stratum
) >= (int) (*cur
)->to_stratum
)
621 /* If there's already targets at this stratum, remove them. */
622 /* FIXME: cagney/2003-10-15: I think this should be popping all
623 targets to CUR, and not just those at this stratum level. */
624 while ((*cur
) != NULL
&& t
->to_stratum
== (*cur
)->to_stratum
)
626 /* There's already something at this stratum level. Close it,
627 and un-hook it from the stack. */
628 struct target_ops
*tmp
= (*cur
);
630 (*cur
) = (*cur
)->beneath
;
635 /* We have removed all targets in our stratum, now add the new one. */
639 update_current_target ();
642 /* Remove a target_ops vector from the stack, wherever it may be.
643 Return how many times it was removed (0 or 1). */
646 unpush_target (struct target_ops
*t
)
648 struct target_ops
**cur
;
649 struct target_ops
*tmp
;
651 if (t
->to_stratum
== dummy_stratum
)
652 internal_error (__FILE__
, __LINE__
,
653 _("Attempt to unpush the dummy target"));
655 /* Look for the specified target. Note that we assume that a target
656 can only occur once in the target stack. */
658 for (cur
= &target_stack
; (*cur
) != NULL
; cur
= &(*cur
)->beneath
)
664 /* If we don't find target_ops, quit. Only open targets should be
669 /* Unchain the target. */
671 (*cur
) = (*cur
)->beneath
;
674 update_current_target ();
676 /* Finally close the target. Note we do this after unchaining, so
677 any target method calls from within the target_close
678 implementation don't end up in T anymore. */
685 pop_all_targets_above (enum strata above_stratum
)
687 while ((int) (current_target
.to_stratum
) > (int) above_stratum
)
689 if (!unpush_target (target_stack
))
691 fprintf_unfiltered (gdb_stderr
,
692 "pop_all_targets couldn't find target %s\n",
693 target_stack
->to_shortname
);
694 internal_error (__FILE__
, __LINE__
,
695 _("failed internal consistency check"));
702 pop_all_targets (void)
704 pop_all_targets_above (dummy_stratum
);
707 /* Return 1 if T is now pushed in the target stack. Return 0 otherwise. */
710 target_is_pushed (struct target_ops
*t
)
712 struct target_ops
**cur
;
714 /* Check magic number. If wrong, it probably means someone changed
715 the struct definition, but not all the places that initialize one. */
716 if (t
->to_magic
!= OPS_MAGIC
)
718 fprintf_unfiltered (gdb_stderr
,
719 "Magic number of %s target struct wrong\n",
721 internal_error (__FILE__
, __LINE__
,
722 _("failed internal consistency check"));
725 for (cur
= &target_stack
; (*cur
) != NULL
; cur
= &(*cur
)->beneath
)
732 /* Using the objfile specified in OBJFILE, find the address for the
733 current thread's thread-local storage with offset OFFSET. */
735 target_translate_tls_address (struct objfile
*objfile
, CORE_ADDR offset
)
737 volatile CORE_ADDR addr
= 0;
738 struct target_ops
*target
;
740 for (target
= current_target
.beneath
;
742 target
= target
->beneath
)
744 if (target
->to_get_thread_local_address
!= NULL
)
749 && gdbarch_fetch_tls_load_module_address_p (target_gdbarch ()))
751 ptid_t ptid
= inferior_ptid
;
752 volatile struct gdb_exception ex
;
754 TRY_CATCH (ex
, RETURN_MASK_ALL
)
758 /* Fetch the load module address for this objfile. */
759 lm_addr
= gdbarch_fetch_tls_load_module_address (target_gdbarch (),
762 addr
= target
->to_get_thread_local_address (target
, ptid
,
765 /* If an error occurred, print TLS related messages here. Otherwise,
766 throw the error to some higher catcher. */
769 int objfile_is_library
= (objfile
->flags
& OBJF_SHARED
);
773 case TLS_NO_LIBRARY_SUPPORT_ERROR
:
774 error (_("Cannot find thread-local variables "
775 "in this thread library."));
777 case TLS_LOAD_MODULE_NOT_FOUND_ERROR
:
778 if (objfile_is_library
)
779 error (_("Cannot find shared library `%s' in dynamic"
780 " linker's load module list"), objfile_name (objfile
));
782 error (_("Cannot find executable file `%s' in dynamic"
783 " linker's load module list"), objfile_name (objfile
));
785 case TLS_NOT_ALLOCATED_YET_ERROR
:
786 if (objfile_is_library
)
787 error (_("The inferior has not yet allocated storage for"
788 " thread-local variables in\n"
789 "the shared library `%s'\n"
791 objfile_name (objfile
), target_pid_to_str (ptid
));
793 error (_("The inferior has not yet allocated storage for"
794 " thread-local variables in\n"
795 "the executable `%s'\n"
797 objfile_name (objfile
), target_pid_to_str (ptid
));
799 case TLS_GENERIC_ERROR
:
800 if (objfile_is_library
)
801 error (_("Cannot find thread-local storage for %s, "
802 "shared library %s:\n%s"),
803 target_pid_to_str (ptid
),
804 objfile_name (objfile
), ex
.message
);
806 error (_("Cannot find thread-local storage for %s, "
807 "executable file %s:\n%s"),
808 target_pid_to_str (ptid
),
809 objfile_name (objfile
), ex
.message
);
812 throw_exception (ex
);
817 /* It wouldn't be wrong here to try a gdbarch method, too; finding
818 TLS is an ABI-specific thing. But we don't do that yet. */
820 error (_("Cannot find thread-local variables on this target"));
826 target_xfer_status_to_string (enum target_xfer_status status
)
828 #define CASE(X) case X: return #X
831 CASE(TARGET_XFER_E_IO
);
832 CASE(TARGET_XFER_UNAVAILABLE
);
841 #define MIN(A, B) (((A) <= (B)) ? (A) : (B))
843 /* target_read_string -- read a null terminated string, up to LEN bytes,
844 from MEMADDR in target. Set *ERRNOP to the errno code, or 0 if successful.
845 Set *STRING to a pointer to malloc'd memory containing the data; the caller
846 is responsible for freeing it. Return the number of bytes successfully
850 target_read_string (CORE_ADDR memaddr
, char **string
, int len
, int *errnop
)
856 int buffer_allocated
;
858 unsigned int nbytes_read
= 0;
862 /* Small for testing. */
863 buffer_allocated
= 4;
864 buffer
= xmalloc (buffer_allocated
);
869 tlen
= MIN (len
, 4 - (memaddr
& 3));
870 offset
= memaddr
& 3;
872 errcode
= target_read_memory (memaddr
& ~3, buf
, sizeof buf
);
875 /* The transfer request might have crossed the boundary to an
876 unallocated region of memory. Retry the transfer, requesting
880 errcode
= target_read_memory (memaddr
, buf
, 1);
885 if (bufptr
- buffer
+ tlen
> buffer_allocated
)
889 bytes
= bufptr
- buffer
;
890 buffer_allocated
*= 2;
891 buffer
= xrealloc (buffer
, buffer_allocated
);
892 bufptr
= buffer
+ bytes
;
895 for (i
= 0; i
< tlen
; i
++)
897 *bufptr
++ = buf
[i
+ offset
];
898 if (buf
[i
+ offset
] == '\000')
900 nbytes_read
+= i
+ 1;
916 struct target_section_table
*
917 target_get_section_table (struct target_ops
*target
)
920 fprintf_unfiltered (gdb_stdlog
, "target_get_section_table ()\n");
922 return (*target
->to_get_section_table
) (target
);
925 /* Find a section containing ADDR. */
927 struct target_section
*
928 target_section_by_addr (struct target_ops
*target
, CORE_ADDR addr
)
930 struct target_section_table
*table
= target_get_section_table (target
);
931 struct target_section
*secp
;
936 for (secp
= table
->sections
; secp
< table
->sections_end
; secp
++)
938 if (addr
>= secp
->addr
&& addr
< secp
->endaddr
)
944 /* Read memory from more than one valid target. A core file, for
945 instance, could have some of memory but delegate other bits to
946 the target below it. So, we must manually try all targets. */
948 static enum target_xfer_status
949 raw_memory_xfer_partial (struct target_ops
*ops
, gdb_byte
*readbuf
,
950 const gdb_byte
*writebuf
, ULONGEST memaddr
, LONGEST len
,
951 ULONGEST
*xfered_len
)
953 enum target_xfer_status res
;
957 res
= ops
->to_xfer_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
958 readbuf
, writebuf
, memaddr
, len
,
960 if (res
== TARGET_XFER_OK
)
963 /* Stop if the target reports that the memory is not available. */
964 if (res
== TARGET_XFER_UNAVAILABLE
)
967 /* We want to continue past core files to executables, but not
968 past a running target's memory. */
969 if (ops
->to_has_all_memory (ops
))
976 /* The cache works at the raw memory level. Make sure the cache
977 gets updated with raw contents no matter what kind of memory
978 object was originally being written. Note we do write-through
979 first, so that if it fails, we don't write to the cache contents
980 that never made it to the target. */
982 && !ptid_equal (inferior_ptid
, null_ptid
)
983 && target_dcache_init_p ()
984 && (stack_cache_enabled_p () || code_cache_enabled_p ()))
986 DCACHE
*dcache
= target_dcache_get ();
988 /* Note that writing to an area of memory which wasn't present
989 in the cache doesn't cause it to be loaded in. */
990 dcache_update (dcache
, res
, memaddr
, writebuf
, *xfered_len
);
996 /* Perform a partial memory transfer.
997 For docs see target.h, to_xfer_partial. */
999 static enum target_xfer_status
1000 memory_xfer_partial_1 (struct target_ops
*ops
, enum target_object object
,
1001 gdb_byte
*readbuf
, const gdb_byte
*writebuf
, ULONGEST memaddr
,
1002 ULONGEST len
, ULONGEST
*xfered_len
)
1004 enum target_xfer_status res
;
1006 struct mem_region
*region
;
1007 struct inferior
*inf
;
1009 /* For accesses to unmapped overlay sections, read directly from
1010 files. Must do this first, as MEMADDR may need adjustment. */
1011 if (readbuf
!= NULL
&& overlay_debugging
)
1013 struct obj_section
*section
= find_pc_overlay (memaddr
);
1015 if (pc_in_unmapped_range (memaddr
, section
))
1017 struct target_section_table
*table
1018 = target_get_section_table (ops
);
1019 const char *section_name
= section
->the_bfd_section
->name
;
1021 memaddr
= overlay_mapped_address (memaddr
, section
);
1022 return section_table_xfer_memory_partial (readbuf
, writebuf
,
1023 memaddr
, len
, xfered_len
,
1025 table
->sections_end
,
1030 /* Try the executable files, if "trust-readonly-sections" is set. */
1031 if (readbuf
!= NULL
&& trust_readonly
)
1033 struct target_section
*secp
;
1034 struct target_section_table
*table
;
1036 secp
= target_section_by_addr (ops
, memaddr
);
1038 && (bfd_get_section_flags (secp
->the_bfd_section
->owner
,
1039 secp
->the_bfd_section
)
1042 table
= target_get_section_table (ops
);
1043 return section_table_xfer_memory_partial (readbuf
, writebuf
,
1044 memaddr
, len
, xfered_len
,
1046 table
->sections_end
,
1051 /* Try GDB's internal data cache. */
1052 region
= lookup_mem_region (memaddr
);
1053 /* region->hi == 0 means there's no upper bound. */
1054 if (memaddr
+ len
< region
->hi
|| region
->hi
== 0)
1057 reg_len
= region
->hi
- memaddr
;
1059 switch (region
->attrib
.mode
)
1062 if (writebuf
!= NULL
)
1063 return TARGET_XFER_E_IO
;
1067 if (readbuf
!= NULL
)
1068 return TARGET_XFER_E_IO
;
1072 /* We only support writing to flash during "load" for now. */
1073 if (writebuf
!= NULL
)
1074 error (_("Writing to flash memory forbidden in this context"));
1078 return TARGET_XFER_E_IO
;
1081 if (!ptid_equal (inferior_ptid
, null_ptid
))
1082 inf
= find_inferior_pid (ptid_get_pid (inferior_ptid
));
1088 /* The dcache reads whole cache lines; that doesn't play well
1089 with reading from a trace buffer, because reading outside of
1090 the collected memory range fails. */
1091 && get_traceframe_number () == -1
1092 && (region
->attrib
.cache
1093 || (stack_cache_enabled_p () && object
== TARGET_OBJECT_STACK_MEMORY
)
1094 || (code_cache_enabled_p () && object
== TARGET_OBJECT_CODE_MEMORY
)))
1096 DCACHE
*dcache
= target_dcache_get_or_init ();
1098 return dcache_read_memory_partial (ops
, dcache
, memaddr
, readbuf
,
1099 reg_len
, xfered_len
);
1102 /* If none of those methods found the memory we wanted, fall back
1103 to a target partial transfer. Normally a single call to
1104 to_xfer_partial is enough; if it doesn't recognize an object
1105 it will call the to_xfer_partial of the next target down.
1106 But for memory this won't do. Memory is the only target
1107 object which can be read from more than one valid target.
1108 A core file, for instance, could have some of memory but
1109 delegate other bits to the target below it. So, we must
1110 manually try all targets. */
1112 res
= raw_memory_xfer_partial (ops
, readbuf
, writebuf
, memaddr
, reg_len
,
1115 /* If we still haven't got anything, return the last error. We
1120 /* Perform a partial memory transfer. For docs see target.h,
1123 static enum target_xfer_status
1124 memory_xfer_partial (struct target_ops
*ops
, enum target_object object
,
1125 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1126 ULONGEST memaddr
, ULONGEST len
, ULONGEST
*xfered_len
)
1128 enum target_xfer_status res
;
1130 /* Zero length requests are ok and require no work. */
1132 return TARGET_XFER_EOF
;
1134 /* Fill in READBUF with breakpoint shadows, or WRITEBUF with
1135 breakpoint insns, thus hiding out from higher layers whether
1136 there are software breakpoints inserted in the code stream. */
1137 if (readbuf
!= NULL
)
1139 res
= memory_xfer_partial_1 (ops
, object
, readbuf
, NULL
, memaddr
, len
,
1142 if (res
== TARGET_XFER_OK
&& !show_memory_breakpoints
)
1143 breakpoint_xfer_memory (readbuf
, NULL
, NULL
, memaddr
, *xfered_len
);
1148 struct cleanup
*old_chain
;
1150 /* A large write request is likely to be partially satisfied
1151 by memory_xfer_partial_1. We will continually malloc
1152 and free a copy of the entire write request for breakpoint
1153 shadow handling even though we only end up writing a small
1154 subset of it. Cap writes to 4KB to mitigate this. */
1155 len
= min (4096, len
);
1157 buf
= xmalloc (len
);
1158 old_chain
= make_cleanup (xfree
, buf
);
1159 memcpy (buf
, writebuf
, len
);
1161 breakpoint_xfer_memory (NULL
, buf
, writebuf
, memaddr
, len
);
1162 res
= memory_xfer_partial_1 (ops
, object
, NULL
, buf
, memaddr
, len
,
1165 do_cleanups (old_chain
);
1172 restore_show_memory_breakpoints (void *arg
)
1174 show_memory_breakpoints
= (uintptr_t) arg
;
1178 make_show_memory_breakpoints_cleanup (int show
)
1180 int current
= show_memory_breakpoints
;
1182 show_memory_breakpoints
= show
;
1183 return make_cleanup (restore_show_memory_breakpoints
,
1184 (void *) (uintptr_t) current
);
1187 /* For docs see target.h, to_xfer_partial. */
1189 enum target_xfer_status
1190 target_xfer_partial (struct target_ops
*ops
,
1191 enum target_object object
, const char *annex
,
1192 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1193 ULONGEST offset
, ULONGEST len
,
1194 ULONGEST
*xfered_len
)
1196 enum target_xfer_status retval
;
1198 gdb_assert (ops
->to_xfer_partial
!= NULL
);
1200 /* Transfer is done when LEN is zero. */
1202 return TARGET_XFER_EOF
;
1204 if (writebuf
&& !may_write_memory
)
1205 error (_("Writing to memory is not allowed (addr %s, len %s)"),
1206 core_addr_to_string_nz (offset
), plongest (len
));
1210 /* If this is a memory transfer, let the memory-specific code
1211 have a look at it instead. Memory transfers are more
1213 if (object
== TARGET_OBJECT_MEMORY
|| object
== TARGET_OBJECT_STACK_MEMORY
1214 || object
== TARGET_OBJECT_CODE_MEMORY
)
1215 retval
= memory_xfer_partial (ops
, object
, readbuf
,
1216 writebuf
, offset
, len
, xfered_len
);
1217 else if (object
== TARGET_OBJECT_RAW_MEMORY
)
1219 /* Request the normal memory object from other layers. */
1220 retval
= raw_memory_xfer_partial (ops
, readbuf
, writebuf
, offset
, len
,
1224 retval
= ops
->to_xfer_partial (ops
, object
, annex
, readbuf
,
1225 writebuf
, offset
, len
, xfered_len
);
1229 const unsigned char *myaddr
= NULL
;
1231 fprintf_unfiltered (gdb_stdlog
,
1232 "%s:target_xfer_partial "
1233 "(%d, %s, %s, %s, %s, %s) = %d, %s",
1236 (annex
? annex
: "(null)"),
1237 host_address_to_string (readbuf
),
1238 host_address_to_string (writebuf
),
1239 core_addr_to_string_nz (offset
),
1240 pulongest (len
), retval
,
1241 pulongest (*xfered_len
));
1247 if (retval
== TARGET_XFER_OK
&& myaddr
!= NULL
)
1251 fputs_unfiltered (", bytes =", gdb_stdlog
);
1252 for (i
= 0; i
< *xfered_len
; i
++)
1254 if ((((intptr_t) &(myaddr
[i
])) & 0xf) == 0)
1256 if (targetdebug
< 2 && i
> 0)
1258 fprintf_unfiltered (gdb_stdlog
, " ...");
1261 fprintf_unfiltered (gdb_stdlog
, "\n");
1264 fprintf_unfiltered (gdb_stdlog
, " %02x", myaddr
[i
] & 0xff);
1268 fputc_unfiltered ('\n', gdb_stdlog
);
1271 /* Check implementations of to_xfer_partial update *XFERED_LEN
1272 properly. Do assertion after printing debug messages, so that we
1273 can find more clues on assertion failure from debugging messages. */
1274 if (retval
== TARGET_XFER_OK
|| retval
== TARGET_XFER_UNAVAILABLE
)
1275 gdb_assert (*xfered_len
> 0);
1280 /* Read LEN bytes of target memory at address MEMADDR, placing the
1281 results in GDB's memory at MYADDR. Returns either 0 for success or
1282 TARGET_XFER_E_IO if any error occurs.
1284 If an error occurs, no guarantee is made about the contents of the data at
1285 MYADDR. In particular, the caller should not depend upon partial reads
1286 filling the buffer with good data. There is no way for the caller to know
1287 how much good data might have been transfered anyway. Callers that can
1288 deal with partial reads should call target_read (which will retry until
1289 it makes no progress, and then return how much was transferred). */
1292 target_read_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1294 /* Dispatch to the topmost target, not the flattened current_target.
1295 Memory accesses check target->to_has_(all_)memory, and the
1296 flattened target doesn't inherit those. */
1297 if (target_read (current_target
.beneath
, TARGET_OBJECT_MEMORY
, NULL
,
1298 myaddr
, memaddr
, len
) == len
)
1301 return TARGET_XFER_E_IO
;
1304 /* Like target_read_memory, but specify explicitly that this is a read
1305 from the target's raw memory. That is, this read bypasses the
1306 dcache, breakpoint shadowing, etc. */
1309 target_read_raw_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1311 /* See comment in target_read_memory about why the request starts at
1312 current_target.beneath. */
1313 if (target_read (current_target
.beneath
, TARGET_OBJECT_RAW_MEMORY
, NULL
,
1314 myaddr
, memaddr
, len
) == len
)
1317 return TARGET_XFER_E_IO
;
1320 /* Like target_read_memory, but specify explicitly that this is a read from
1321 the target's stack. This may trigger different cache behavior. */
1324 target_read_stack (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1326 /* See comment in target_read_memory about why the request starts at
1327 current_target.beneath. */
1328 if (target_read (current_target
.beneath
, TARGET_OBJECT_STACK_MEMORY
, NULL
,
1329 myaddr
, memaddr
, len
) == len
)
1332 return TARGET_XFER_E_IO
;
1335 /* Like target_read_memory, but specify explicitly that this is a read from
1336 the target's code. This may trigger different cache behavior. */
1339 target_read_code (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1341 /* See comment in target_read_memory about why the request starts at
1342 current_target.beneath. */
1343 if (target_read (current_target
.beneath
, TARGET_OBJECT_CODE_MEMORY
, NULL
,
1344 myaddr
, memaddr
, len
) == len
)
1347 return TARGET_XFER_E_IO
;
1350 /* Write LEN bytes from MYADDR to target memory at address MEMADDR.
1351 Returns either 0 for success or TARGET_XFER_E_IO if any
1352 error occurs. If an error occurs, no guarantee is made about how
1353 much data got written. Callers that can deal with partial writes
1354 should call target_write. */
1357 target_write_memory (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ssize_t len
)
1359 /* See comment in target_read_memory about why the request starts at
1360 current_target.beneath. */
1361 if (target_write (current_target
.beneath
, TARGET_OBJECT_MEMORY
, NULL
,
1362 myaddr
, memaddr
, len
) == len
)
1365 return TARGET_XFER_E_IO
;
1368 /* Write LEN bytes from MYADDR to target raw memory at address
1369 MEMADDR. Returns either 0 for success or TARGET_XFER_E_IO
1370 if any error occurs. If an error occurs, no guarantee is made
1371 about how much data got written. Callers that can deal with
1372 partial writes should call target_write. */
1375 target_write_raw_memory (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ssize_t len
)
1377 /* See comment in target_read_memory about why the request starts at
1378 current_target.beneath. */
1379 if (target_write (current_target
.beneath
, TARGET_OBJECT_RAW_MEMORY
, NULL
,
1380 myaddr
, memaddr
, len
) == len
)
1383 return TARGET_XFER_E_IO
;
1386 /* Fetch the target's memory map. */
1389 target_memory_map (void)
1391 VEC(mem_region_s
) *result
;
1392 struct mem_region
*last_one
, *this_one
;
1394 struct target_ops
*t
;
1397 fprintf_unfiltered (gdb_stdlog
, "target_memory_map ()\n");
1399 result
= current_target
.to_memory_map (¤t_target
);
1403 qsort (VEC_address (mem_region_s
, result
),
1404 VEC_length (mem_region_s
, result
),
1405 sizeof (struct mem_region
), mem_region_cmp
);
1407 /* Check that regions do not overlap. Simultaneously assign
1408 a numbering for the "mem" commands to use to refer to
1411 for (ix
= 0; VEC_iterate (mem_region_s
, result
, ix
, this_one
); ix
++)
1413 this_one
->number
= ix
;
1415 if (last_one
&& last_one
->hi
> this_one
->lo
)
1417 warning (_("Overlapping regions in memory map: ignoring"));
1418 VEC_free (mem_region_s
, result
);
1421 last_one
= this_one
;
1428 target_flash_erase (ULONGEST address
, LONGEST length
)
1431 fprintf_unfiltered (gdb_stdlog
, "target_flash_erase (%s, %s)\n",
1432 hex_string (address
), phex (length
, 0));
1433 current_target
.to_flash_erase (¤t_target
, address
, length
);
1437 target_flash_done (void)
1440 fprintf_unfiltered (gdb_stdlog
, "target_flash_done\n");
1441 current_target
.to_flash_done (¤t_target
);
1445 show_trust_readonly (struct ui_file
*file
, int from_tty
,
1446 struct cmd_list_element
*c
, const char *value
)
1448 fprintf_filtered (file
,
1449 _("Mode for reading from readonly sections is %s.\n"),
1453 /* Target vector read/write partial wrapper functions. */
1455 static enum target_xfer_status
1456 target_read_partial (struct target_ops
*ops
,
1457 enum target_object object
,
1458 const char *annex
, gdb_byte
*buf
,
1459 ULONGEST offset
, ULONGEST len
,
1460 ULONGEST
*xfered_len
)
1462 return target_xfer_partial (ops
, object
, annex
, buf
, NULL
, offset
, len
,
1466 static enum target_xfer_status
1467 target_write_partial (struct target_ops
*ops
,
1468 enum target_object object
,
1469 const char *annex
, const gdb_byte
*buf
,
1470 ULONGEST offset
, LONGEST len
, ULONGEST
*xfered_len
)
1472 return target_xfer_partial (ops
, object
, annex
, NULL
, buf
, offset
, len
,
1476 /* Wrappers to perform the full transfer. */
1478 /* For docs on target_read see target.h. */
1481 target_read (struct target_ops
*ops
,
1482 enum target_object object
,
1483 const char *annex
, gdb_byte
*buf
,
1484 ULONGEST offset
, LONGEST len
)
1488 while (xfered
< len
)
1490 ULONGEST xfered_len
;
1491 enum target_xfer_status status
;
1493 status
= target_read_partial (ops
, object
, annex
,
1494 (gdb_byte
*) buf
+ xfered
,
1495 offset
+ xfered
, len
- xfered
,
1498 /* Call an observer, notifying them of the xfer progress? */
1499 if (status
== TARGET_XFER_EOF
)
1501 else if (status
== TARGET_XFER_OK
)
1503 xfered
+= xfered_len
;
1513 /* Assuming that the entire [begin, end) range of memory cannot be
1514 read, try to read whatever subrange is possible to read.
1516 The function returns, in RESULT, either zero or one memory block.
1517 If there's a readable subrange at the beginning, it is completely
1518 read and returned. Any further readable subrange will not be read.
1519 Otherwise, if there's a readable subrange at the end, it will be
1520 completely read and returned. Any readable subranges before it
1521 (obviously, not starting at the beginning), will be ignored. In
1522 other cases -- either no readable subrange, or readable subrange(s)
1523 that is neither at the beginning, or end, nothing is returned.
1525 The purpose of this function is to handle a read across a boundary
1526 of accessible memory in a case when memory map is not available.
1527 The above restrictions are fine for this case, but will give
1528 incorrect results if the memory is 'patchy'. However, supporting
1529 'patchy' memory would require trying to read every single byte,
1530 and it seems unacceptable solution. Explicit memory map is
1531 recommended for this case -- and target_read_memory_robust will
1532 take care of reading multiple ranges then. */
1535 read_whatever_is_readable (struct target_ops
*ops
,
1536 ULONGEST begin
, ULONGEST end
,
1537 VEC(memory_read_result_s
) **result
)
1539 gdb_byte
*buf
= xmalloc (end
- begin
);
1540 ULONGEST current_begin
= begin
;
1541 ULONGEST current_end
= end
;
1543 memory_read_result_s r
;
1544 ULONGEST xfered_len
;
1546 /* If we previously failed to read 1 byte, nothing can be done here. */
1547 if (end
- begin
<= 1)
1553 /* Check that either first or the last byte is readable, and give up
1554 if not. This heuristic is meant to permit reading accessible memory
1555 at the boundary of accessible region. */
1556 if (target_read_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1557 buf
, begin
, 1, &xfered_len
) == TARGET_XFER_OK
)
1562 else if (target_read_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1563 buf
+ (end
-begin
) - 1, end
- 1, 1,
1564 &xfered_len
) == TARGET_XFER_OK
)
1575 /* Loop invariant is that the [current_begin, current_end) was previously
1576 found to be not readable as a whole.
1578 Note loop condition -- if the range has 1 byte, we can't divide the range
1579 so there's no point trying further. */
1580 while (current_end
- current_begin
> 1)
1582 ULONGEST first_half_begin
, first_half_end
;
1583 ULONGEST second_half_begin
, second_half_end
;
1585 ULONGEST middle
= current_begin
+ (current_end
- current_begin
)/2;
1589 first_half_begin
= current_begin
;
1590 first_half_end
= middle
;
1591 second_half_begin
= middle
;
1592 second_half_end
= current_end
;
1596 first_half_begin
= middle
;
1597 first_half_end
= current_end
;
1598 second_half_begin
= current_begin
;
1599 second_half_end
= middle
;
1602 xfer
= target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1603 buf
+ (first_half_begin
- begin
),
1605 first_half_end
- first_half_begin
);
1607 if (xfer
== first_half_end
- first_half_begin
)
1609 /* This half reads up fine. So, the error must be in the
1611 current_begin
= second_half_begin
;
1612 current_end
= second_half_end
;
1616 /* This half is not readable. Because we've tried one byte, we
1617 know some part of this half if actually redable. Go to the next
1618 iteration to divide again and try to read.
1620 We don't handle the other half, because this function only tries
1621 to read a single readable subrange. */
1622 current_begin
= first_half_begin
;
1623 current_end
= first_half_end
;
1629 /* The [begin, current_begin) range has been read. */
1631 r
.end
= current_begin
;
1636 /* The [current_end, end) range has been read. */
1637 LONGEST rlen
= end
- current_end
;
1639 r
.data
= xmalloc (rlen
);
1640 memcpy (r
.data
, buf
+ current_end
- begin
, rlen
);
1641 r
.begin
= current_end
;
1645 VEC_safe_push(memory_read_result_s
, (*result
), &r
);
1649 free_memory_read_result_vector (void *x
)
1651 VEC(memory_read_result_s
) *v
= x
;
1652 memory_read_result_s
*current
;
1655 for (ix
= 0; VEC_iterate (memory_read_result_s
, v
, ix
, current
); ++ix
)
1657 xfree (current
->data
);
1659 VEC_free (memory_read_result_s
, v
);
1662 VEC(memory_read_result_s
) *
1663 read_memory_robust (struct target_ops
*ops
, ULONGEST offset
, LONGEST len
)
1665 VEC(memory_read_result_s
) *result
= 0;
1668 while (xfered
< len
)
1670 struct mem_region
*region
= lookup_mem_region (offset
+ xfered
);
1673 /* If there is no explicit region, a fake one should be created. */
1674 gdb_assert (region
);
1676 if (region
->hi
== 0)
1677 rlen
= len
- xfered
;
1679 rlen
= region
->hi
- offset
;
1681 if (region
->attrib
.mode
== MEM_NONE
|| region
->attrib
.mode
== MEM_WO
)
1683 /* Cannot read this region. Note that we can end up here only
1684 if the region is explicitly marked inaccessible, or
1685 'inaccessible-by-default' is in effect. */
1690 LONGEST to_read
= min (len
- xfered
, rlen
);
1691 gdb_byte
*buffer
= (gdb_byte
*)xmalloc (to_read
);
1693 LONGEST xfer
= target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1694 (gdb_byte
*) buffer
,
1695 offset
+ xfered
, to_read
);
1696 /* Call an observer, notifying them of the xfer progress? */
1699 /* Got an error reading full chunk. See if maybe we can read
1702 read_whatever_is_readable (ops
, offset
+ xfered
,
1703 offset
+ xfered
+ to_read
, &result
);
1708 struct memory_read_result r
;
1710 r
.begin
= offset
+ xfered
;
1711 r
.end
= r
.begin
+ xfer
;
1712 VEC_safe_push (memory_read_result_s
, result
, &r
);
1722 /* An alternative to target_write with progress callbacks. */
1725 target_write_with_progress (struct target_ops
*ops
,
1726 enum target_object object
,
1727 const char *annex
, const gdb_byte
*buf
,
1728 ULONGEST offset
, LONGEST len
,
1729 void (*progress
) (ULONGEST
, void *), void *baton
)
1733 /* Give the progress callback a chance to set up. */
1735 (*progress
) (0, baton
);
1737 while (xfered
< len
)
1739 ULONGEST xfered_len
;
1740 enum target_xfer_status status
;
1742 status
= target_write_partial (ops
, object
, annex
,
1743 (gdb_byte
*) buf
+ xfered
,
1744 offset
+ xfered
, len
- xfered
,
1747 if (status
!= TARGET_XFER_OK
)
1748 return status
== TARGET_XFER_EOF
? xfered
: -1;
1751 (*progress
) (xfered_len
, baton
);
1753 xfered
+= xfered_len
;
1759 /* For docs on target_write see target.h. */
1762 target_write (struct target_ops
*ops
,
1763 enum target_object object
,
1764 const char *annex
, const gdb_byte
*buf
,
1765 ULONGEST offset
, LONGEST len
)
1767 return target_write_with_progress (ops
, object
, annex
, buf
, offset
, len
,
1771 /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return
1772 the size of the transferred data. PADDING additional bytes are
1773 available in *BUF_P. This is a helper function for
1774 target_read_alloc; see the declaration of that function for more
1778 target_read_alloc_1 (struct target_ops
*ops
, enum target_object object
,
1779 const char *annex
, gdb_byte
**buf_p
, int padding
)
1781 size_t buf_alloc
, buf_pos
;
1784 /* This function does not have a length parameter; it reads the
1785 entire OBJECT). Also, it doesn't support objects fetched partly
1786 from one target and partly from another (in a different stratum,
1787 e.g. a core file and an executable). Both reasons make it
1788 unsuitable for reading memory. */
1789 gdb_assert (object
!= TARGET_OBJECT_MEMORY
);
1791 /* Start by reading up to 4K at a time. The target will throttle
1792 this number down if necessary. */
1794 buf
= xmalloc (buf_alloc
);
1798 ULONGEST xfered_len
;
1799 enum target_xfer_status status
;
1801 status
= target_read_partial (ops
, object
, annex
, &buf
[buf_pos
],
1802 buf_pos
, buf_alloc
- buf_pos
- padding
,
1805 if (status
== TARGET_XFER_EOF
)
1807 /* Read all there was. */
1814 else if (status
!= TARGET_XFER_OK
)
1816 /* An error occurred. */
1818 return TARGET_XFER_E_IO
;
1821 buf_pos
+= xfered_len
;
1823 /* If the buffer is filling up, expand it. */
1824 if (buf_alloc
< buf_pos
* 2)
1827 buf
= xrealloc (buf
, buf_alloc
);
1834 /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return
1835 the size of the transferred data. See the declaration in "target.h"
1836 function for more information about the return value. */
1839 target_read_alloc (struct target_ops
*ops
, enum target_object object
,
1840 const char *annex
, gdb_byte
**buf_p
)
1842 return target_read_alloc_1 (ops
, object
, annex
, buf_p
, 0);
1845 /* Read OBJECT/ANNEX using OPS. The result is NUL-terminated and
1846 returned as a string, allocated using xmalloc. If an error occurs
1847 or the transfer is unsupported, NULL is returned. Empty objects
1848 are returned as allocated but empty strings. A warning is issued
1849 if the result contains any embedded NUL bytes. */
1852 target_read_stralloc (struct target_ops
*ops
, enum target_object object
,
1857 LONGEST i
, transferred
;
1859 transferred
= target_read_alloc_1 (ops
, object
, annex
, &buffer
, 1);
1860 bufstr
= (char *) buffer
;
1862 if (transferred
< 0)
1865 if (transferred
== 0)
1866 return xstrdup ("");
1868 bufstr
[transferred
] = 0;
1870 /* Check for embedded NUL bytes; but allow trailing NULs. */
1871 for (i
= strlen (bufstr
); i
< transferred
; i
++)
1874 warning (_("target object %d, annex %s, "
1875 "contained unexpected null characters"),
1876 (int) object
, annex
? annex
: "(none)");
1883 /* Memory transfer methods. */
1886 get_target_memory (struct target_ops
*ops
, CORE_ADDR addr
, gdb_byte
*buf
,
1889 /* This method is used to read from an alternate, non-current
1890 target. This read must bypass the overlay support (as symbols
1891 don't match this target), and GDB's internal cache (wrong cache
1892 for this target). */
1893 if (target_read (ops
, TARGET_OBJECT_RAW_MEMORY
, NULL
, buf
, addr
, len
)
1895 memory_error (TARGET_XFER_E_IO
, addr
);
1899 get_target_memory_unsigned (struct target_ops
*ops
, CORE_ADDR addr
,
1900 int len
, enum bfd_endian byte_order
)
1902 gdb_byte buf
[sizeof (ULONGEST
)];
1904 gdb_assert (len
<= sizeof (buf
));
1905 get_target_memory (ops
, addr
, buf
, len
);
1906 return extract_unsigned_integer (buf
, len
, byte_order
);
1912 target_insert_breakpoint (struct gdbarch
*gdbarch
,
1913 struct bp_target_info
*bp_tgt
)
1915 if (!may_insert_breakpoints
)
1917 warning (_("May not insert breakpoints"));
1921 return current_target
.to_insert_breakpoint (¤t_target
,
1928 target_remove_breakpoint (struct gdbarch
*gdbarch
,
1929 struct bp_target_info
*bp_tgt
)
1931 /* This is kind of a weird case to handle, but the permission might
1932 have been changed after breakpoints were inserted - in which case
1933 we should just take the user literally and assume that any
1934 breakpoints should be left in place. */
1935 if (!may_insert_breakpoints
)
1937 warning (_("May not remove breakpoints"));
1941 return current_target
.to_remove_breakpoint (¤t_target
,
1946 target_info (char *args
, int from_tty
)
1948 struct target_ops
*t
;
1949 int has_all_mem
= 0;
1951 if (symfile_objfile
!= NULL
)
1952 printf_unfiltered (_("Symbols from \"%s\".\n"),
1953 objfile_name (symfile_objfile
));
1955 for (t
= target_stack
; t
!= NULL
; t
= t
->beneath
)
1957 if (!(*t
->to_has_memory
) (t
))
1960 if ((int) (t
->to_stratum
) <= (int) dummy_stratum
)
1963 printf_unfiltered (_("\tWhile running this, "
1964 "GDB does not access memory from...\n"));
1965 printf_unfiltered ("%s:\n", t
->to_longname
);
1966 (t
->to_files_info
) (t
);
1967 has_all_mem
= (*t
->to_has_all_memory
) (t
);
1971 /* This function is called before any new inferior is created, e.g.
1972 by running a program, attaching, or connecting to a target.
1973 It cleans up any state from previous invocations which might
1974 change between runs. This is a subset of what target_preopen
1975 resets (things which might change between targets). */
1978 target_pre_inferior (int from_tty
)
1980 /* Clear out solib state. Otherwise the solib state of the previous
1981 inferior might have survived and is entirely wrong for the new
1982 target. This has been observed on GNU/Linux using glibc 2.3. How
1994 Cannot access memory at address 0xdeadbeef
1997 /* In some OSs, the shared library list is the same/global/shared
1998 across inferiors. If code is shared between processes, so are
1999 memory regions and features. */
2000 if (!gdbarch_has_global_solist (target_gdbarch ()))
2002 no_shared_libraries (NULL
, from_tty
);
2004 invalidate_target_mem_regions ();
2006 target_clear_description ();
2009 agent_capability_invalidate ();
2012 /* Callback for iterate_over_inferiors. Gets rid of the given
2016 dispose_inferior (struct inferior
*inf
, void *args
)
2018 struct thread_info
*thread
;
2020 thread
= any_thread_of_process (inf
->pid
);
2023 switch_to_thread (thread
->ptid
);
2025 /* Core inferiors actually should be detached, not killed. */
2026 if (target_has_execution
)
2029 target_detach (NULL
, 0);
2035 /* This is to be called by the open routine before it does
2039 target_preopen (int from_tty
)
2043 if (have_inferiors ())
2046 || !have_live_inferiors ()
2047 || query (_("A program is being debugged already. Kill it? ")))
2048 iterate_over_inferiors (dispose_inferior
, NULL
);
2050 error (_("Program not killed."));
2053 /* Calling target_kill may remove the target from the stack. But if
2054 it doesn't (which seems like a win for UDI), remove it now. */
2055 /* Leave the exec target, though. The user may be switching from a
2056 live process to a core of the same program. */
2057 pop_all_targets_above (file_stratum
);
2059 target_pre_inferior (from_tty
);
2062 /* Detach a target after doing deferred register stores. */
2065 target_detach (const char *args
, int from_tty
)
2067 struct target_ops
* t
;
2069 if (gdbarch_has_global_breakpoints (target_gdbarch ()))
2070 /* Don't remove global breakpoints here. They're removed on
2071 disconnection from the target. */
2074 /* If we're in breakpoints-always-inserted mode, have to remove
2075 them before detaching. */
2076 remove_breakpoints_pid (ptid_get_pid (inferior_ptid
));
2078 prepare_for_detach ();
2080 current_target
.to_detach (¤t_target
, args
, from_tty
);
2082 fprintf_unfiltered (gdb_stdlog
, "target_detach (%s, %d)\n",
2087 target_disconnect (char *args
, int from_tty
)
2089 /* If we're in breakpoints-always-inserted mode or if breakpoints
2090 are global across processes, we have to remove them before
2092 remove_breakpoints ();
2095 fprintf_unfiltered (gdb_stdlog
, "target_disconnect (%s, %d)\n",
2097 current_target
.to_disconnect (¤t_target
, args
, from_tty
);
2101 target_wait (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
2103 struct target_ops
*t
;
2104 ptid_t retval
= (current_target
.to_wait
) (¤t_target
, ptid
,
2109 char *status_string
;
2110 char *options_string
;
2112 status_string
= target_waitstatus_to_string (status
);
2113 options_string
= target_options_to_string (options
);
2114 fprintf_unfiltered (gdb_stdlog
,
2115 "target_wait (%d, status, options={%s})"
2117 ptid_get_pid (ptid
), options_string
,
2118 ptid_get_pid (retval
), status_string
);
2119 xfree (status_string
);
2120 xfree (options_string
);
2127 target_pid_to_str (ptid_t ptid
)
2129 return (*current_target
.to_pid_to_str
) (¤t_target
, ptid
);
2133 target_thread_name (struct thread_info
*info
)
2135 return current_target
.to_thread_name (¤t_target
, info
);
2139 target_resume (ptid_t ptid
, int step
, enum gdb_signal signal
)
2141 struct target_ops
*t
;
2143 target_dcache_invalidate ();
2145 current_target
.to_resume (¤t_target
, ptid
, step
, signal
);
2147 fprintf_unfiltered (gdb_stdlog
, "target_resume (%d, %s, %s)\n",
2148 ptid_get_pid (ptid
),
2149 step
? "step" : "continue",
2150 gdb_signal_to_name (signal
));
2152 registers_changed_ptid (ptid
);
2153 set_executing (ptid
, 1);
2154 set_running (ptid
, 1);
2155 clear_inline_frame_state (ptid
);
2159 target_pass_signals (int numsigs
, unsigned char *pass_signals
)
2165 fprintf_unfiltered (gdb_stdlog
, "target_pass_signals (%d, {",
2168 for (i
= 0; i
< numsigs
; i
++)
2169 if (pass_signals
[i
])
2170 fprintf_unfiltered (gdb_stdlog
, " %s",
2171 gdb_signal_to_name (i
));
2173 fprintf_unfiltered (gdb_stdlog
, " })\n");
2176 (*current_target
.to_pass_signals
) (¤t_target
, numsigs
, pass_signals
);
2180 target_program_signals (int numsigs
, unsigned char *program_signals
)
2186 fprintf_unfiltered (gdb_stdlog
, "target_program_signals (%d, {",
2189 for (i
= 0; i
< numsigs
; i
++)
2190 if (program_signals
[i
])
2191 fprintf_unfiltered (gdb_stdlog
, " %s",
2192 gdb_signal_to_name (i
));
2194 fprintf_unfiltered (gdb_stdlog
, " })\n");
2197 (*current_target
.to_program_signals
) (¤t_target
,
2198 numsigs
, program_signals
);
2202 default_follow_fork (struct target_ops
*self
, int follow_child
,
2205 /* Some target returned a fork event, but did not know how to follow it. */
2206 internal_error (__FILE__
, __LINE__
,
2207 _("could not find a target to follow fork"));
2210 /* Look through the list of possible targets for a target that can
2214 target_follow_fork (int follow_child
, int detach_fork
)
2216 int retval
= current_target
.to_follow_fork (¤t_target
,
2217 follow_child
, detach_fork
);
2220 fprintf_unfiltered (gdb_stdlog
,
2221 "target_follow_fork (%d, %d) = %d\n",
2222 follow_child
, detach_fork
, retval
);
2227 default_mourn_inferior (struct target_ops
*self
)
2229 internal_error (__FILE__
, __LINE__
,
2230 _("could not find a target to follow mourn inferior"));
2234 target_mourn_inferior (void)
2236 current_target
.to_mourn_inferior (¤t_target
);
2238 fprintf_unfiltered (gdb_stdlog
, "target_mourn_inferior ()\n");
2240 /* We no longer need to keep handles on any of the object files.
2241 Make sure to release them to avoid unnecessarily locking any
2242 of them while we're not actually debugging. */
2243 bfd_cache_close_all ();
2246 /* Look for a target which can describe architectural features, starting
2247 from TARGET. If we find one, return its description. */
2249 const struct target_desc
*
2250 target_read_description (struct target_ops
*target
)
2252 return target
->to_read_description (target
);
2255 /* This implements a basic search of memory, reading target memory and
2256 performing the search here (as opposed to performing the search in on the
2257 target side with, for example, gdbserver). */
2260 simple_search_memory (struct target_ops
*ops
,
2261 CORE_ADDR start_addr
, ULONGEST search_space_len
,
2262 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2263 CORE_ADDR
*found_addrp
)
2265 /* NOTE: also defined in find.c testcase. */
2266 #define SEARCH_CHUNK_SIZE 16000
2267 const unsigned chunk_size
= SEARCH_CHUNK_SIZE
;
2268 /* Buffer to hold memory contents for searching. */
2269 gdb_byte
*search_buf
;
2270 unsigned search_buf_size
;
2271 struct cleanup
*old_cleanups
;
2273 search_buf_size
= chunk_size
+ pattern_len
- 1;
2275 /* No point in trying to allocate a buffer larger than the search space. */
2276 if (search_space_len
< search_buf_size
)
2277 search_buf_size
= search_space_len
;
2279 search_buf
= malloc (search_buf_size
);
2280 if (search_buf
== NULL
)
2281 error (_("Unable to allocate memory to perform the search."));
2282 old_cleanups
= make_cleanup (free_current_contents
, &search_buf
);
2284 /* Prime the search buffer. */
2286 if (target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2287 search_buf
, start_addr
, search_buf_size
) != search_buf_size
)
2289 warning (_("Unable to access %s bytes of target "
2290 "memory at %s, halting search."),
2291 pulongest (search_buf_size
), hex_string (start_addr
));
2292 do_cleanups (old_cleanups
);
2296 /* Perform the search.
2298 The loop is kept simple by allocating [N + pattern-length - 1] bytes.
2299 When we've scanned N bytes we copy the trailing bytes to the start and
2300 read in another N bytes. */
2302 while (search_space_len
>= pattern_len
)
2304 gdb_byte
*found_ptr
;
2305 unsigned nr_search_bytes
= min (search_space_len
, search_buf_size
);
2307 found_ptr
= memmem (search_buf
, nr_search_bytes
,
2308 pattern
, pattern_len
);
2310 if (found_ptr
!= NULL
)
2312 CORE_ADDR found_addr
= start_addr
+ (found_ptr
- search_buf
);
2314 *found_addrp
= found_addr
;
2315 do_cleanups (old_cleanups
);
2319 /* Not found in this chunk, skip to next chunk. */
2321 /* Don't let search_space_len wrap here, it's unsigned. */
2322 if (search_space_len
>= chunk_size
)
2323 search_space_len
-= chunk_size
;
2325 search_space_len
= 0;
2327 if (search_space_len
>= pattern_len
)
2329 unsigned keep_len
= search_buf_size
- chunk_size
;
2330 CORE_ADDR read_addr
= start_addr
+ chunk_size
+ keep_len
;
2333 /* Copy the trailing part of the previous iteration to the front
2334 of the buffer for the next iteration. */
2335 gdb_assert (keep_len
== pattern_len
- 1);
2336 memcpy (search_buf
, search_buf
+ chunk_size
, keep_len
);
2338 nr_to_read
= min (search_space_len
- keep_len
, chunk_size
);
2340 if (target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2341 search_buf
+ keep_len
, read_addr
,
2342 nr_to_read
) != nr_to_read
)
2344 warning (_("Unable to access %s bytes of target "
2345 "memory at %s, halting search."),
2346 plongest (nr_to_read
),
2347 hex_string (read_addr
));
2348 do_cleanups (old_cleanups
);
2352 start_addr
+= chunk_size
;
2358 do_cleanups (old_cleanups
);
2362 /* Default implementation of memory-searching. */
2365 default_search_memory (struct target_ops
*self
,
2366 CORE_ADDR start_addr
, ULONGEST search_space_len
,
2367 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2368 CORE_ADDR
*found_addrp
)
2370 /* Start over from the top of the target stack. */
2371 return simple_search_memory (current_target
.beneath
,
2372 start_addr
, search_space_len
,
2373 pattern
, pattern_len
, found_addrp
);
2376 /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the
2377 sequence of bytes in PATTERN with length PATTERN_LEN.
2379 The result is 1 if found, 0 if not found, and -1 if there was an error
2380 requiring halting of the search (e.g. memory read error).
2381 If the pattern is found the address is recorded in FOUND_ADDRP. */
2384 target_search_memory (CORE_ADDR start_addr
, ULONGEST search_space_len
,
2385 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2386 CORE_ADDR
*found_addrp
)
2391 fprintf_unfiltered (gdb_stdlog
, "target_search_memory (%s, ...)\n",
2392 hex_string (start_addr
));
2394 found
= current_target
.to_search_memory (¤t_target
, start_addr
,
2396 pattern
, pattern_len
, found_addrp
);
2399 fprintf_unfiltered (gdb_stdlog
, " = %d\n", found
);
2404 /* Look through the currently pushed targets. If none of them will
2405 be able to restart the currently running process, issue an error
2409 target_require_runnable (void)
2411 struct target_ops
*t
;
2413 for (t
= target_stack
; t
!= NULL
; t
= t
->beneath
)
2415 /* If this target knows how to create a new program, then
2416 assume we will still be able to after killing the current
2417 one. Either killing and mourning will not pop T, or else
2418 find_default_run_target will find it again. */
2419 if (t
->to_create_inferior
!= NULL
)
2422 /* Do not worry about thread_stratum targets that can not
2423 create inferiors. Assume they will be pushed again if
2424 necessary, and continue to the process_stratum. */
2425 if (t
->to_stratum
== thread_stratum
2426 || t
->to_stratum
== arch_stratum
)
2429 error (_("The \"%s\" target does not support \"run\". "
2430 "Try \"help target\" or \"continue\"."),
2434 /* This function is only called if the target is running. In that
2435 case there should have been a process_stratum target and it
2436 should either know how to create inferiors, or not... */
2437 internal_error (__FILE__
, __LINE__
, _("No targets found"));
2440 /* Whether GDB is allowed to fall back to the default run target for
2441 "run", "attach", etc. when no target is connected yet. */
2442 static int auto_connect_native_target
= 1;
2445 show_auto_connect_native_target (struct ui_file
*file
, int from_tty
,
2446 struct cmd_list_element
*c
, const char *value
)
2448 fprintf_filtered (file
,
2449 _("Whether GDB may automatically connect to the "
2450 "native target is %s.\n"),
2454 /* Look through the list of possible targets for a target that can
2455 execute a run or attach command without any other data. This is
2456 used to locate the default process stratum.
2458 If DO_MESG is not NULL, the result is always valid (error() is
2459 called for errors); else, return NULL on error. */
2461 static struct target_ops
*
2462 find_default_run_target (char *do_mesg
)
2464 struct target_ops
*runable
= NULL
;
2466 if (auto_connect_native_target
)
2468 struct target_ops
**t
;
2471 for (t
= target_structs
; t
< target_structs
+ target_struct_size
;
2474 if ((*t
)->to_can_run
!= delegate_can_run
&& target_can_run (*t
))
2485 if (runable
== NULL
)
2488 error (_("Don't know how to %s. Try \"help target\"."), do_mesg
);
2499 find_attach_target (void)
2501 struct target_ops
*t
;
2503 /* If a target on the current stack can attach, use it. */
2504 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2506 if (t
->to_attach
!= NULL
)
2510 /* Otherwise, use the default run target for attaching. */
2512 t
= find_default_run_target ("attach");
2520 find_run_target (void)
2522 struct target_ops
*t
;
2524 /* If a target on the current stack can attach, use it. */
2525 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2527 if (t
->to_create_inferior
!= NULL
)
2531 /* Otherwise, use the default run target. */
2533 t
= find_default_run_target ("run");
2538 /* Implement the "info proc" command. */
2541 target_info_proc (char *args
, enum info_proc_what what
)
2543 struct target_ops
*t
;
2545 /* If we're already connected to something that can get us OS
2546 related data, use it. Otherwise, try using the native
2548 if (current_target
.to_stratum
>= process_stratum
)
2549 t
= current_target
.beneath
;
2551 t
= find_default_run_target (NULL
);
2553 for (; t
!= NULL
; t
= t
->beneath
)
2555 if (t
->to_info_proc
!= NULL
)
2557 t
->to_info_proc (t
, args
, what
);
2560 fprintf_unfiltered (gdb_stdlog
,
2561 "target_info_proc (\"%s\", %d)\n", args
, what
);
2571 find_default_supports_disable_randomization (struct target_ops
*self
)
2573 struct target_ops
*t
;
2575 t
= find_default_run_target (NULL
);
2576 if (t
&& t
->to_supports_disable_randomization
)
2577 return (t
->to_supports_disable_randomization
) (t
);
2582 target_supports_disable_randomization (void)
2584 struct target_ops
*t
;
2586 for (t
= ¤t_target
; t
!= NULL
; t
= t
->beneath
)
2587 if (t
->to_supports_disable_randomization
)
2588 return t
->to_supports_disable_randomization (t
);
2594 target_get_osdata (const char *type
)
2596 struct target_ops
*t
;
2598 /* If we're already connected to something that can get us OS
2599 related data, use it. Otherwise, try using the native
2601 if (current_target
.to_stratum
>= process_stratum
)
2602 t
= current_target
.beneath
;
2604 t
= find_default_run_target ("get OS data");
2609 return target_read_stralloc (t
, TARGET_OBJECT_OSDATA
, type
);
2612 /* Determine the current address space of thread PTID. */
2614 struct address_space
*
2615 target_thread_address_space (ptid_t ptid
)
2617 struct address_space
*aspace
;
2618 struct inferior
*inf
;
2619 struct target_ops
*t
;
2621 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2623 if (t
->to_thread_address_space
!= NULL
)
2625 aspace
= t
->to_thread_address_space (t
, ptid
);
2626 gdb_assert (aspace
);
2629 fprintf_unfiltered (gdb_stdlog
,
2630 "target_thread_address_space (%s) = %d\n",
2631 target_pid_to_str (ptid
),
2632 address_space_num (aspace
));
2637 /* Fall-back to the "main" address space of the inferior. */
2638 inf
= find_inferior_pid (ptid_get_pid (ptid
));
2640 if (inf
== NULL
|| inf
->aspace
== NULL
)
2641 internal_error (__FILE__
, __LINE__
,
2642 _("Can't determine the current "
2643 "address space of thread %s\n"),
2644 target_pid_to_str (ptid
));
2650 /* Target file operations. */
2652 static struct target_ops
*
2653 default_fileio_target (void)
2655 /* If we're already connected to something that can perform
2656 file I/O, use it. Otherwise, try using the native target. */
2657 if (current_target
.to_stratum
>= process_stratum
)
2658 return current_target
.beneath
;
2660 return find_default_run_target ("file I/O");
2663 /* Open FILENAME on the target, using FLAGS and MODE. Return a
2664 target file descriptor, or -1 if an error occurs (and set
2667 target_fileio_open (const char *filename
, int flags
, int mode
,
2670 struct target_ops
*t
;
2672 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
2674 if (t
->to_fileio_open
!= NULL
)
2676 int fd
= t
->to_fileio_open (t
, filename
, flags
, mode
, target_errno
);
2679 fprintf_unfiltered (gdb_stdlog
,
2680 "target_fileio_open (%s,0x%x,0%o) = %d (%d)\n",
2681 filename
, flags
, mode
,
2682 fd
, fd
!= -1 ? 0 : *target_errno
);
2687 *target_errno
= FILEIO_ENOSYS
;
2691 /* Write up to LEN bytes from WRITE_BUF to FD on the target.
2692 Return the number of bytes written, or -1 if an error occurs
2693 (and set *TARGET_ERRNO). */
2695 target_fileio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
2696 ULONGEST offset
, int *target_errno
)
2698 struct target_ops
*t
;
2700 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
2702 if (t
->to_fileio_pwrite
!= NULL
)
2704 int ret
= t
->to_fileio_pwrite (t
, fd
, write_buf
, len
, offset
,
2708 fprintf_unfiltered (gdb_stdlog
,
2709 "target_fileio_pwrite (%d,...,%d,%s) "
2711 fd
, len
, pulongest (offset
),
2712 ret
, ret
!= -1 ? 0 : *target_errno
);
2717 *target_errno
= FILEIO_ENOSYS
;
2721 /* Read up to LEN bytes FD on the target into READ_BUF.
2722 Return the number of bytes read, or -1 if an error occurs
2723 (and set *TARGET_ERRNO). */
2725 target_fileio_pread (int fd
, gdb_byte
*read_buf
, int len
,
2726 ULONGEST offset
, int *target_errno
)
2728 struct target_ops
*t
;
2730 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
2732 if (t
->to_fileio_pread
!= NULL
)
2734 int ret
= t
->to_fileio_pread (t
, fd
, read_buf
, len
, offset
,
2738 fprintf_unfiltered (gdb_stdlog
,
2739 "target_fileio_pread (%d,...,%d,%s) "
2741 fd
, len
, pulongest (offset
),
2742 ret
, ret
!= -1 ? 0 : *target_errno
);
2747 *target_errno
= FILEIO_ENOSYS
;
2751 /* Close FD on the target. Return 0, or -1 if an error occurs
2752 (and set *TARGET_ERRNO). */
2754 target_fileio_close (int fd
, int *target_errno
)
2756 struct target_ops
*t
;
2758 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
2760 if (t
->to_fileio_close
!= NULL
)
2762 int ret
= t
->to_fileio_close (t
, fd
, target_errno
);
2765 fprintf_unfiltered (gdb_stdlog
,
2766 "target_fileio_close (%d) = %d (%d)\n",
2767 fd
, ret
, ret
!= -1 ? 0 : *target_errno
);
2772 *target_errno
= FILEIO_ENOSYS
;
2776 /* Unlink FILENAME on the target. Return 0, or -1 if an error
2777 occurs (and set *TARGET_ERRNO). */
2779 target_fileio_unlink (const char *filename
, int *target_errno
)
2781 struct target_ops
*t
;
2783 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
2785 if (t
->to_fileio_unlink
!= NULL
)
2787 int ret
= t
->to_fileio_unlink (t
, filename
, target_errno
);
2790 fprintf_unfiltered (gdb_stdlog
,
2791 "target_fileio_unlink (%s) = %d (%d)\n",
2792 filename
, ret
, ret
!= -1 ? 0 : *target_errno
);
2797 *target_errno
= FILEIO_ENOSYS
;
2801 /* Read value of symbolic link FILENAME on the target. Return a
2802 null-terminated string allocated via xmalloc, or NULL if an error
2803 occurs (and set *TARGET_ERRNO). */
2805 target_fileio_readlink (const char *filename
, int *target_errno
)
2807 struct target_ops
*t
;
2809 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
2811 if (t
->to_fileio_readlink
!= NULL
)
2813 char *ret
= t
->to_fileio_readlink (t
, filename
, target_errno
);
2816 fprintf_unfiltered (gdb_stdlog
,
2817 "target_fileio_readlink (%s) = %s (%d)\n",
2818 filename
, ret
? ret
: "(nil)",
2819 ret
? 0 : *target_errno
);
2824 *target_errno
= FILEIO_ENOSYS
;
2829 target_fileio_close_cleanup (void *opaque
)
2831 int fd
= *(int *) opaque
;
2834 target_fileio_close (fd
, &target_errno
);
2837 /* Read target file FILENAME. Store the result in *BUF_P and
2838 return the size of the transferred data. PADDING additional bytes are
2839 available in *BUF_P. This is a helper function for
2840 target_fileio_read_alloc; see the declaration of that function for more
2844 target_fileio_read_alloc_1 (const char *filename
,
2845 gdb_byte
**buf_p
, int padding
)
2847 struct cleanup
*close_cleanup
;
2848 size_t buf_alloc
, buf_pos
;
2854 fd
= target_fileio_open (filename
, FILEIO_O_RDONLY
, 0700, &target_errno
);
2858 close_cleanup
= make_cleanup (target_fileio_close_cleanup
, &fd
);
2860 /* Start by reading up to 4K at a time. The target will throttle
2861 this number down if necessary. */
2863 buf
= xmalloc (buf_alloc
);
2867 n
= target_fileio_pread (fd
, &buf
[buf_pos
],
2868 buf_alloc
- buf_pos
- padding
, buf_pos
,
2872 /* An error occurred. */
2873 do_cleanups (close_cleanup
);
2879 /* Read all there was. */
2880 do_cleanups (close_cleanup
);
2890 /* If the buffer is filling up, expand it. */
2891 if (buf_alloc
< buf_pos
* 2)
2894 buf
= xrealloc (buf
, buf_alloc
);
2901 /* Read target file FILENAME. Store the result in *BUF_P and return
2902 the size of the transferred data. See the declaration in "target.h"
2903 function for more information about the return value. */
2906 target_fileio_read_alloc (const char *filename
, gdb_byte
**buf_p
)
2908 return target_fileio_read_alloc_1 (filename
, buf_p
, 0);
2911 /* Read target file FILENAME. The result is NUL-terminated and
2912 returned as a string, allocated using xmalloc. If an error occurs
2913 or the transfer is unsupported, NULL is returned. Empty objects
2914 are returned as allocated but empty strings. A warning is issued
2915 if the result contains any embedded NUL bytes. */
2918 target_fileio_read_stralloc (const char *filename
)
2922 LONGEST i
, transferred
;
2924 transferred
= target_fileio_read_alloc_1 (filename
, &buffer
, 1);
2925 bufstr
= (char *) buffer
;
2927 if (transferred
< 0)
2930 if (transferred
== 0)
2931 return xstrdup ("");
2933 bufstr
[transferred
] = 0;
2935 /* Check for embedded NUL bytes; but allow trailing NULs. */
2936 for (i
= strlen (bufstr
); i
< transferred
; i
++)
2939 warning (_("target file %s "
2940 "contained unexpected null characters"),
2950 default_region_ok_for_hw_watchpoint (struct target_ops
*self
,
2951 CORE_ADDR addr
, int len
)
2953 return (len
<= gdbarch_ptr_bit (target_gdbarch ()) / TARGET_CHAR_BIT
);
2957 default_watchpoint_addr_within_range (struct target_ops
*target
,
2959 CORE_ADDR start
, int length
)
2961 return addr
>= start
&& addr
< start
+ length
;
2964 static struct gdbarch
*
2965 default_thread_architecture (struct target_ops
*ops
, ptid_t ptid
)
2967 return target_gdbarch ();
2971 return_zero (struct target_ops
*ignore
)
2977 return_zero_has_execution (struct target_ops
*ignore
, ptid_t ignore2
)
2983 * Find the next target down the stack from the specified target.
2987 find_target_beneath (struct target_ops
*t
)
2995 find_target_at (enum strata stratum
)
2997 struct target_ops
*t
;
2999 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3000 if (t
->to_stratum
== stratum
)
3007 /* The inferior process has died. Long live the inferior! */
3010 generic_mourn_inferior (void)
3014 ptid
= inferior_ptid
;
3015 inferior_ptid
= null_ptid
;
3017 /* Mark breakpoints uninserted in case something tries to delete a
3018 breakpoint while we delete the inferior's threads (which would
3019 fail, since the inferior is long gone). */
3020 mark_breakpoints_out ();
3022 if (!ptid_equal (ptid
, null_ptid
))
3024 int pid
= ptid_get_pid (ptid
);
3025 exit_inferior (pid
);
3028 /* Note this wipes step-resume breakpoints, so needs to be done
3029 after exit_inferior, which ends up referencing the step-resume
3030 breakpoints through clear_thread_inferior_resources. */
3031 breakpoint_init_inferior (inf_exited
);
3033 registers_changed ();
3035 reopen_exec_file ();
3036 reinit_frame_cache ();
3038 if (deprecated_detach_hook
)
3039 deprecated_detach_hook ();
3042 /* Convert a normal process ID to a string. Returns the string in a
3046 normal_pid_to_str (ptid_t ptid
)
3048 static char buf
[32];
3050 xsnprintf (buf
, sizeof buf
, "process %d", ptid_get_pid (ptid
));
3055 default_pid_to_str (struct target_ops
*ops
, ptid_t ptid
)
3057 return normal_pid_to_str (ptid
);
3060 /* Error-catcher for target_find_memory_regions. */
3062 dummy_find_memory_regions (struct target_ops
*self
,
3063 find_memory_region_ftype ignore1
, void *ignore2
)
3065 error (_("Command not implemented for this target."));
3069 /* Error-catcher for target_make_corefile_notes. */
3071 dummy_make_corefile_notes (struct target_ops
*self
,
3072 bfd
*ignore1
, int *ignore2
)
3074 error (_("Command not implemented for this target."));
3078 /* Set up the handful of non-empty slots needed by the dummy target
3082 init_dummy_target (void)
3084 dummy_target
.to_shortname
= "None";
3085 dummy_target
.to_longname
= "None";
3086 dummy_target
.to_doc
= "";
3087 dummy_target
.to_supports_disable_randomization
3088 = find_default_supports_disable_randomization
;
3089 dummy_target
.to_stratum
= dummy_stratum
;
3090 dummy_target
.to_has_all_memory
= return_zero
;
3091 dummy_target
.to_has_memory
= return_zero
;
3092 dummy_target
.to_has_stack
= return_zero
;
3093 dummy_target
.to_has_registers
= return_zero
;
3094 dummy_target
.to_has_execution
= return_zero_has_execution
;
3095 dummy_target
.to_magic
= OPS_MAGIC
;
3097 install_dummy_methods (&dummy_target
);
3101 debug_to_open (char *args
, int from_tty
)
3103 debug_target
.to_open (args
, from_tty
);
3105 fprintf_unfiltered (gdb_stdlog
, "target_open (%s, %d)\n", args
, from_tty
);
3109 target_close (struct target_ops
*targ
)
3111 gdb_assert (!target_is_pushed (targ
));
3113 if (targ
->to_xclose
!= NULL
)
3114 targ
->to_xclose (targ
);
3115 else if (targ
->to_close
!= NULL
)
3116 targ
->to_close (targ
);
3119 fprintf_unfiltered (gdb_stdlog
, "target_close ()\n");
3123 target_thread_alive (ptid_t ptid
)
3127 retval
= current_target
.to_thread_alive (¤t_target
, ptid
);
3129 fprintf_unfiltered (gdb_stdlog
, "target_thread_alive (%d) = %d\n",
3130 ptid_get_pid (ptid
), retval
);
3136 target_find_new_threads (void)
3138 current_target
.to_find_new_threads (¤t_target
);
3140 fprintf_unfiltered (gdb_stdlog
, "target_find_new_threads ()\n");
3144 target_stop (ptid_t ptid
)
3148 warning (_("May not interrupt or stop the target, ignoring attempt"));
3152 (*current_target
.to_stop
) (¤t_target
, ptid
);
3156 debug_to_post_attach (struct target_ops
*self
, int pid
)
3158 debug_target
.to_post_attach (&debug_target
, pid
);
3160 fprintf_unfiltered (gdb_stdlog
, "target_post_attach (%d)\n", pid
);
3163 /* Concatenate ELEM to LIST, a comma separate list, and return the
3164 result. The LIST incoming argument is released. */
3167 str_comma_list_concat_elem (char *list
, const char *elem
)
3170 return xstrdup (elem
);
3172 return reconcat (list
, list
, ", ", elem
, (char *) NULL
);
3175 /* Helper for target_options_to_string. If OPT is present in
3176 TARGET_OPTIONS, append the OPT_STR (string version of OPT) in RET.
3177 Returns the new resulting string. OPT is removed from
3181 do_option (int *target_options
, char *ret
,
3182 int opt
, char *opt_str
)
3184 if ((*target_options
& opt
) != 0)
3186 ret
= str_comma_list_concat_elem (ret
, opt_str
);
3187 *target_options
&= ~opt
;
3194 target_options_to_string (int target_options
)
3198 #define DO_TARG_OPTION(OPT) \
3199 ret = do_option (&target_options, ret, OPT, #OPT)
3201 DO_TARG_OPTION (TARGET_WNOHANG
);
3203 if (target_options
!= 0)
3204 ret
= str_comma_list_concat_elem (ret
, "unknown???");
3212 debug_print_register (const char * func
,
3213 struct regcache
*regcache
, int regno
)
3215 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
3217 fprintf_unfiltered (gdb_stdlog
, "%s ", func
);
3218 if (regno
>= 0 && regno
< gdbarch_num_regs (gdbarch
)
3219 && gdbarch_register_name (gdbarch
, regno
) != NULL
3220 && gdbarch_register_name (gdbarch
, regno
)[0] != '\0')
3221 fprintf_unfiltered (gdb_stdlog
, "(%s)",
3222 gdbarch_register_name (gdbarch
, regno
));
3224 fprintf_unfiltered (gdb_stdlog
, "(%d)", regno
);
3225 if (regno
>= 0 && regno
< gdbarch_num_regs (gdbarch
))
3227 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
3228 int i
, size
= register_size (gdbarch
, regno
);
3229 gdb_byte buf
[MAX_REGISTER_SIZE
];
3231 regcache_raw_collect (regcache
, regno
, buf
);
3232 fprintf_unfiltered (gdb_stdlog
, " = ");
3233 for (i
= 0; i
< size
; i
++)
3235 fprintf_unfiltered (gdb_stdlog
, "%02x", buf
[i
]);
3237 if (size
<= sizeof (LONGEST
))
3239 ULONGEST val
= extract_unsigned_integer (buf
, size
, byte_order
);
3241 fprintf_unfiltered (gdb_stdlog
, " %s %s",
3242 core_addr_to_string_nz (val
), plongest (val
));
3245 fprintf_unfiltered (gdb_stdlog
, "\n");
3249 target_fetch_registers (struct regcache
*regcache
, int regno
)
3251 current_target
.to_fetch_registers (¤t_target
, regcache
, regno
);
3253 debug_print_register ("target_fetch_registers", regcache
, regno
);
3257 target_store_registers (struct regcache
*regcache
, int regno
)
3259 struct target_ops
*t
;
3261 if (!may_write_registers
)
3262 error (_("Writing to registers is not allowed (regno %d)"), regno
);
3264 current_target
.to_store_registers (¤t_target
, regcache
, regno
);
3267 debug_print_register ("target_store_registers", regcache
, regno
);
3272 target_core_of_thread (ptid_t ptid
)
3274 int retval
= current_target
.to_core_of_thread (¤t_target
, ptid
);
3277 fprintf_unfiltered (gdb_stdlog
,
3278 "target_core_of_thread (%d) = %d\n",
3279 ptid_get_pid (ptid
), retval
);
3284 simple_verify_memory (struct target_ops
*ops
,
3285 const gdb_byte
*data
, CORE_ADDR lma
, ULONGEST size
)
3287 LONGEST total_xfered
= 0;
3289 while (total_xfered
< size
)
3291 ULONGEST xfered_len
;
3292 enum target_xfer_status status
;
3294 ULONGEST howmuch
= min (sizeof (buf
), size
- total_xfered
);
3296 status
= target_xfer_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
3297 buf
, NULL
, lma
+ total_xfered
, howmuch
,
3299 if (status
== TARGET_XFER_OK
3300 && memcmp (data
+ total_xfered
, buf
, xfered_len
) == 0)
3302 total_xfered
+= xfered_len
;
3311 /* Default implementation of memory verification. */
3314 default_verify_memory (struct target_ops
*self
,
3315 const gdb_byte
*data
, CORE_ADDR memaddr
, ULONGEST size
)
3317 /* Start over from the top of the target stack. */
3318 return simple_verify_memory (current_target
.beneath
,
3319 data
, memaddr
, size
);
3323 target_verify_memory (const gdb_byte
*data
, CORE_ADDR memaddr
, ULONGEST size
)
3325 int retval
= current_target
.to_verify_memory (¤t_target
,
3326 data
, memaddr
, size
);
3329 fprintf_unfiltered (gdb_stdlog
,
3330 "target_verify_memory (%s, %s) = %d\n",
3331 paddress (target_gdbarch (), memaddr
),
3337 /* The documentation for this function is in its prototype declaration in
3341 target_insert_mask_watchpoint (CORE_ADDR addr
, CORE_ADDR mask
, int rw
)
3345 ret
= current_target
.to_insert_mask_watchpoint (¤t_target
,
3349 fprintf_unfiltered (gdb_stdlog
, "\
3350 target_insert_mask_watchpoint (%s, %s, %d) = %d\n",
3351 core_addr_to_string (addr
),
3352 core_addr_to_string (mask
), rw
, ret
);
3357 /* The documentation for this function is in its prototype declaration in
3361 target_remove_mask_watchpoint (CORE_ADDR addr
, CORE_ADDR mask
, int rw
)
3365 ret
= current_target
.to_remove_mask_watchpoint (¤t_target
,
3369 fprintf_unfiltered (gdb_stdlog
, "\
3370 target_remove_mask_watchpoint (%s, %s, %d) = %d\n",
3371 core_addr_to_string (addr
),
3372 core_addr_to_string (mask
), rw
, ret
);
3377 /* The documentation for this function is in its prototype declaration
3381 target_masked_watch_num_registers (CORE_ADDR addr
, CORE_ADDR mask
)
3383 return current_target
.to_masked_watch_num_registers (¤t_target
,
3387 /* The documentation for this function is in its prototype declaration
3391 target_ranged_break_num_registers (void)
3393 return current_target
.to_ranged_break_num_registers (¤t_target
);
3398 struct btrace_target_info
*
3399 target_enable_btrace (ptid_t ptid
)
3401 return current_target
.to_enable_btrace (¤t_target
, ptid
);
3407 target_disable_btrace (struct btrace_target_info
*btinfo
)
3409 current_target
.to_disable_btrace (¤t_target
, btinfo
);
3415 target_teardown_btrace (struct btrace_target_info
*btinfo
)
3417 current_target
.to_teardown_btrace (¤t_target
, btinfo
);
3423 target_read_btrace (VEC (btrace_block_s
) **btrace
,
3424 struct btrace_target_info
*btinfo
,
3425 enum btrace_read_type type
)
3427 return current_target
.to_read_btrace (¤t_target
, btrace
, btinfo
, type
);
3433 target_stop_recording (void)
3435 current_target
.to_stop_recording (¤t_target
);
3441 target_info_record (void)
3443 struct target_ops
*t
;
3445 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3446 if (t
->to_info_record
!= NULL
)
3448 t
->to_info_record (t
);
3458 target_save_record (const char *filename
)
3460 current_target
.to_save_record (¤t_target
, filename
);
3466 target_supports_delete_record (void)
3468 struct target_ops
*t
;
3470 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3471 if (t
->to_delete_record
!= NULL
)
3480 target_delete_record (void)
3482 current_target
.to_delete_record (¤t_target
);
3488 target_record_is_replaying (void)
3490 return current_target
.to_record_is_replaying (¤t_target
);
3496 target_goto_record_begin (void)
3498 current_target
.to_goto_record_begin (¤t_target
);
3504 target_goto_record_end (void)
3506 current_target
.to_goto_record_end (¤t_target
);
3512 target_goto_record (ULONGEST insn
)
3514 current_target
.to_goto_record (¤t_target
, insn
);
3520 target_insn_history (int size
, int flags
)
3522 current_target
.to_insn_history (¤t_target
, size
, flags
);
3528 target_insn_history_from (ULONGEST from
, int size
, int flags
)
3530 current_target
.to_insn_history_from (¤t_target
, from
, size
, flags
);
3536 target_insn_history_range (ULONGEST begin
, ULONGEST end
, int flags
)
3538 current_target
.to_insn_history_range (¤t_target
, begin
, end
, flags
);
3544 target_call_history (int size
, int flags
)
3546 current_target
.to_call_history (¤t_target
, size
, flags
);
3552 target_call_history_from (ULONGEST begin
, int size
, int flags
)
3554 current_target
.to_call_history_from (¤t_target
, begin
, size
, flags
);
3560 target_call_history_range (ULONGEST begin
, ULONGEST end
, int flags
)
3562 current_target
.to_call_history_range (¤t_target
, begin
, end
, flags
);
3566 debug_to_prepare_to_store (struct target_ops
*self
, struct regcache
*regcache
)
3568 debug_target
.to_prepare_to_store (&debug_target
, regcache
);
3570 fprintf_unfiltered (gdb_stdlog
, "target_prepare_to_store ()\n");
3575 const struct frame_unwind
*
3576 target_get_unwinder (void)
3578 return current_target
.to_get_unwinder (¤t_target
);
3583 const struct frame_unwind
*
3584 target_get_tailcall_unwinder (void)
3586 return current_target
.to_get_tailcall_unwinder (¤t_target
);
3589 /* Default implementation of to_decr_pc_after_break. */
3592 default_target_decr_pc_after_break (struct target_ops
*ops
,
3593 struct gdbarch
*gdbarch
)
3595 return gdbarch_decr_pc_after_break (gdbarch
);
3601 target_decr_pc_after_break (struct gdbarch
*gdbarch
)
3603 return current_target
.to_decr_pc_after_break (¤t_target
, gdbarch
);
3607 debug_to_files_info (struct target_ops
*target
)
3609 debug_target
.to_files_info (target
);
3611 fprintf_unfiltered (gdb_stdlog
, "target_files_info (xxx)\n");
3615 debug_to_insert_breakpoint (struct target_ops
*ops
, struct gdbarch
*gdbarch
,
3616 struct bp_target_info
*bp_tgt
)
3620 retval
= debug_target
.to_insert_breakpoint (&debug_target
, gdbarch
, bp_tgt
);
3622 fprintf_unfiltered (gdb_stdlog
,
3623 "target_insert_breakpoint (%s, xxx) = %ld\n",
3624 core_addr_to_string (bp_tgt
->placed_address
),
3625 (unsigned long) retval
);
3630 debug_to_remove_breakpoint (struct target_ops
*ops
, struct gdbarch
*gdbarch
,
3631 struct bp_target_info
*bp_tgt
)
3635 retval
= debug_target
.to_remove_breakpoint (&debug_target
, gdbarch
, bp_tgt
);
3637 fprintf_unfiltered (gdb_stdlog
,
3638 "target_remove_breakpoint (%s, xxx) = %ld\n",
3639 core_addr_to_string (bp_tgt
->placed_address
),
3640 (unsigned long) retval
);
3645 debug_to_can_use_hw_breakpoint (struct target_ops
*self
,
3646 int type
, int cnt
, int from_tty
)
3650 retval
= debug_target
.to_can_use_hw_breakpoint (&debug_target
,
3651 type
, cnt
, from_tty
);
3653 fprintf_unfiltered (gdb_stdlog
,
3654 "target_can_use_hw_breakpoint (%ld, %ld, %ld) = %ld\n",
3655 (unsigned long) type
,
3656 (unsigned long) cnt
,
3657 (unsigned long) from_tty
,
3658 (unsigned long) retval
);
3663 debug_to_region_ok_for_hw_watchpoint (struct target_ops
*self
,
3664 CORE_ADDR addr
, int len
)
3668 retval
= debug_target
.to_region_ok_for_hw_watchpoint (&debug_target
,
3671 fprintf_unfiltered (gdb_stdlog
,
3672 "target_region_ok_for_hw_watchpoint (%s, %ld) = %s\n",
3673 core_addr_to_string (addr
), (unsigned long) len
,
3674 core_addr_to_string (retval
));
3679 debug_to_can_accel_watchpoint_condition (struct target_ops
*self
,
3680 CORE_ADDR addr
, int len
, int rw
,
3681 struct expression
*cond
)
3685 retval
= debug_target
.to_can_accel_watchpoint_condition (&debug_target
,
3689 fprintf_unfiltered (gdb_stdlog
,
3690 "target_can_accel_watchpoint_condition "
3691 "(%s, %d, %d, %s) = %ld\n",
3692 core_addr_to_string (addr
), len
, rw
,
3693 host_address_to_string (cond
), (unsigned long) retval
);
3698 debug_to_stopped_by_watchpoint (struct target_ops
*ops
)
3702 retval
= debug_target
.to_stopped_by_watchpoint (&debug_target
);
3704 fprintf_unfiltered (gdb_stdlog
,
3705 "target_stopped_by_watchpoint () = %ld\n",
3706 (unsigned long) retval
);
3711 debug_to_stopped_data_address (struct target_ops
*target
, CORE_ADDR
*addr
)
3715 retval
= debug_target
.to_stopped_data_address (target
, addr
);
3717 fprintf_unfiltered (gdb_stdlog
,
3718 "target_stopped_data_address ([%s]) = %ld\n",
3719 core_addr_to_string (*addr
),
3720 (unsigned long)retval
);
3725 debug_to_watchpoint_addr_within_range (struct target_ops
*target
,
3727 CORE_ADDR start
, int length
)
3731 retval
= debug_target
.to_watchpoint_addr_within_range (target
, addr
,
3734 fprintf_filtered (gdb_stdlog
,
3735 "target_watchpoint_addr_within_range (%s, %s, %d) = %d\n",
3736 core_addr_to_string (addr
), core_addr_to_string (start
),
3742 debug_to_insert_hw_breakpoint (struct target_ops
*self
,
3743 struct gdbarch
*gdbarch
,
3744 struct bp_target_info
*bp_tgt
)
3748 retval
= debug_target
.to_insert_hw_breakpoint (&debug_target
,
3751 fprintf_unfiltered (gdb_stdlog
,
3752 "target_insert_hw_breakpoint (%s, xxx) = %ld\n",
3753 core_addr_to_string (bp_tgt
->placed_address
),
3754 (unsigned long) retval
);
3759 debug_to_remove_hw_breakpoint (struct target_ops
*self
,
3760 struct gdbarch
*gdbarch
,
3761 struct bp_target_info
*bp_tgt
)
3765 retval
= debug_target
.to_remove_hw_breakpoint (&debug_target
,
3768 fprintf_unfiltered (gdb_stdlog
,
3769 "target_remove_hw_breakpoint (%s, xxx) = %ld\n",
3770 core_addr_to_string (bp_tgt
->placed_address
),
3771 (unsigned long) retval
);
3776 debug_to_insert_watchpoint (struct target_ops
*self
,
3777 CORE_ADDR addr
, int len
, int type
,
3778 struct expression
*cond
)
3782 retval
= debug_target
.to_insert_watchpoint (&debug_target
,
3783 addr
, len
, type
, cond
);
3785 fprintf_unfiltered (gdb_stdlog
,
3786 "target_insert_watchpoint (%s, %d, %d, %s) = %ld\n",
3787 core_addr_to_string (addr
), len
, type
,
3788 host_address_to_string (cond
), (unsigned long) retval
);
3793 debug_to_remove_watchpoint (struct target_ops
*self
,
3794 CORE_ADDR addr
, int len
, int type
,
3795 struct expression
*cond
)
3799 retval
= debug_target
.to_remove_watchpoint (&debug_target
,
3800 addr
, len
, type
, cond
);
3802 fprintf_unfiltered (gdb_stdlog
,
3803 "target_remove_watchpoint (%s, %d, %d, %s) = %ld\n",
3804 core_addr_to_string (addr
), len
, type
,
3805 host_address_to_string (cond
), (unsigned long) retval
);
3810 debug_to_terminal_init (struct target_ops
*self
)
3812 debug_target
.to_terminal_init (&debug_target
);
3814 fprintf_unfiltered (gdb_stdlog
, "target_terminal_init ()\n");
3818 debug_to_terminal_inferior (struct target_ops
*self
)
3820 debug_target
.to_terminal_inferior (&debug_target
);
3822 fprintf_unfiltered (gdb_stdlog
, "target_terminal_inferior ()\n");
3826 debug_to_terminal_ours_for_output (struct target_ops
*self
)
3828 debug_target
.to_terminal_ours_for_output (&debug_target
);
3830 fprintf_unfiltered (gdb_stdlog
, "target_terminal_ours_for_output ()\n");
3834 debug_to_terminal_ours (struct target_ops
*self
)
3836 debug_target
.to_terminal_ours (&debug_target
);
3838 fprintf_unfiltered (gdb_stdlog
, "target_terminal_ours ()\n");
3842 debug_to_terminal_save_ours (struct target_ops
*self
)
3844 debug_target
.to_terminal_save_ours (&debug_target
);
3846 fprintf_unfiltered (gdb_stdlog
, "target_terminal_save_ours ()\n");
3850 debug_to_terminal_info (struct target_ops
*self
,
3851 const char *arg
, int from_tty
)
3853 debug_target
.to_terminal_info (&debug_target
, arg
, from_tty
);
3855 fprintf_unfiltered (gdb_stdlog
, "target_terminal_info (%s, %d)\n", arg
,
3860 debug_to_load (struct target_ops
*self
, char *args
, int from_tty
)
3862 debug_target
.to_load (&debug_target
, args
, from_tty
);
3864 fprintf_unfiltered (gdb_stdlog
, "target_load (%s, %d)\n", args
, from_tty
);
3868 debug_to_post_startup_inferior (struct target_ops
*self
, ptid_t ptid
)
3870 debug_target
.to_post_startup_inferior (&debug_target
, ptid
);
3872 fprintf_unfiltered (gdb_stdlog
, "target_post_startup_inferior (%d)\n",
3873 ptid_get_pid (ptid
));
3877 debug_to_insert_fork_catchpoint (struct target_ops
*self
, int pid
)
3881 retval
= debug_target
.to_insert_fork_catchpoint (&debug_target
, pid
);
3883 fprintf_unfiltered (gdb_stdlog
, "target_insert_fork_catchpoint (%d) = %d\n",
3890 debug_to_remove_fork_catchpoint (struct target_ops
*self
, int pid
)
3894 retval
= debug_target
.to_remove_fork_catchpoint (&debug_target
, pid
);
3896 fprintf_unfiltered (gdb_stdlog
, "target_remove_fork_catchpoint (%d) = %d\n",
3903 debug_to_insert_vfork_catchpoint (struct target_ops
*self
, int pid
)
3907 retval
= debug_target
.to_insert_vfork_catchpoint (&debug_target
, pid
);
3909 fprintf_unfiltered (gdb_stdlog
, "target_insert_vfork_catchpoint (%d) = %d\n",
3916 debug_to_remove_vfork_catchpoint (struct target_ops
*self
, int pid
)
3920 retval
= debug_target
.to_remove_vfork_catchpoint (&debug_target
, pid
);
3922 fprintf_unfiltered (gdb_stdlog
, "target_remove_vfork_catchpoint (%d) = %d\n",
3929 debug_to_insert_exec_catchpoint (struct target_ops
*self
, int pid
)
3933 retval
= debug_target
.to_insert_exec_catchpoint (&debug_target
, pid
);
3935 fprintf_unfiltered (gdb_stdlog
, "target_insert_exec_catchpoint (%d) = %d\n",
3942 debug_to_remove_exec_catchpoint (struct target_ops
*self
, int pid
)
3946 retval
= debug_target
.to_remove_exec_catchpoint (&debug_target
, pid
);
3948 fprintf_unfiltered (gdb_stdlog
, "target_remove_exec_catchpoint (%d) = %d\n",
3955 debug_to_has_exited (struct target_ops
*self
,
3956 int pid
, int wait_status
, int *exit_status
)
3960 has_exited
= debug_target
.to_has_exited (&debug_target
,
3961 pid
, wait_status
, exit_status
);
3963 fprintf_unfiltered (gdb_stdlog
, "target_has_exited (%d, %d, %d) = %d\n",
3964 pid
, wait_status
, *exit_status
, has_exited
);
3970 debug_to_can_run (struct target_ops
*self
)
3974 retval
= debug_target
.to_can_run (&debug_target
);
3976 fprintf_unfiltered (gdb_stdlog
, "target_can_run () = %d\n", retval
);
3981 static struct gdbarch
*
3982 debug_to_thread_architecture (struct target_ops
*ops
, ptid_t ptid
)
3984 struct gdbarch
*retval
;
3986 retval
= debug_target
.to_thread_architecture (ops
, ptid
);
3988 fprintf_unfiltered (gdb_stdlog
,
3989 "target_thread_architecture (%s) = %s [%s]\n",
3990 target_pid_to_str (ptid
),
3991 host_address_to_string (retval
),
3992 gdbarch_bfd_arch_info (retval
)->printable_name
);
3997 debug_to_stop (struct target_ops
*self
, ptid_t ptid
)
3999 debug_target
.to_stop (&debug_target
, ptid
);
4001 fprintf_unfiltered (gdb_stdlog
, "target_stop (%s)\n",
4002 target_pid_to_str (ptid
));
4006 debug_to_rcmd (struct target_ops
*self
, char *command
,
4007 struct ui_file
*outbuf
)
4009 debug_target
.to_rcmd (&debug_target
, command
, outbuf
);
4010 fprintf_unfiltered (gdb_stdlog
, "target_rcmd (%s, ...)\n", command
);
4014 debug_to_pid_to_exec_file (struct target_ops
*self
, int pid
)
4018 exec_file
= debug_target
.to_pid_to_exec_file (&debug_target
, pid
);
4020 fprintf_unfiltered (gdb_stdlog
, "target_pid_to_exec_file (%d) = %s\n",
4027 setup_target_debug (void)
4029 memcpy (&debug_target
, ¤t_target
, sizeof debug_target
);
4031 current_target
.to_open
= debug_to_open
;
4032 current_target
.to_post_attach
= debug_to_post_attach
;
4033 current_target
.to_prepare_to_store
= debug_to_prepare_to_store
;
4034 current_target
.to_files_info
= debug_to_files_info
;
4035 current_target
.to_insert_breakpoint
= debug_to_insert_breakpoint
;
4036 current_target
.to_remove_breakpoint
= debug_to_remove_breakpoint
;
4037 current_target
.to_can_use_hw_breakpoint
= debug_to_can_use_hw_breakpoint
;
4038 current_target
.to_insert_hw_breakpoint
= debug_to_insert_hw_breakpoint
;
4039 current_target
.to_remove_hw_breakpoint
= debug_to_remove_hw_breakpoint
;
4040 current_target
.to_insert_watchpoint
= debug_to_insert_watchpoint
;
4041 current_target
.to_remove_watchpoint
= debug_to_remove_watchpoint
;
4042 current_target
.to_stopped_by_watchpoint
= debug_to_stopped_by_watchpoint
;
4043 current_target
.to_stopped_data_address
= debug_to_stopped_data_address
;
4044 current_target
.to_watchpoint_addr_within_range
4045 = debug_to_watchpoint_addr_within_range
;
4046 current_target
.to_region_ok_for_hw_watchpoint
4047 = debug_to_region_ok_for_hw_watchpoint
;
4048 current_target
.to_can_accel_watchpoint_condition
4049 = debug_to_can_accel_watchpoint_condition
;
4050 current_target
.to_terminal_init
= debug_to_terminal_init
;
4051 current_target
.to_terminal_inferior
= debug_to_terminal_inferior
;
4052 current_target
.to_terminal_ours_for_output
4053 = debug_to_terminal_ours_for_output
;
4054 current_target
.to_terminal_ours
= debug_to_terminal_ours
;
4055 current_target
.to_terminal_save_ours
= debug_to_terminal_save_ours
;
4056 current_target
.to_terminal_info
= debug_to_terminal_info
;
4057 current_target
.to_load
= debug_to_load
;
4058 current_target
.to_post_startup_inferior
= debug_to_post_startup_inferior
;
4059 current_target
.to_insert_fork_catchpoint
= debug_to_insert_fork_catchpoint
;
4060 current_target
.to_remove_fork_catchpoint
= debug_to_remove_fork_catchpoint
;
4061 current_target
.to_insert_vfork_catchpoint
= debug_to_insert_vfork_catchpoint
;
4062 current_target
.to_remove_vfork_catchpoint
= debug_to_remove_vfork_catchpoint
;
4063 current_target
.to_insert_exec_catchpoint
= debug_to_insert_exec_catchpoint
;
4064 current_target
.to_remove_exec_catchpoint
= debug_to_remove_exec_catchpoint
;
4065 current_target
.to_has_exited
= debug_to_has_exited
;
4066 current_target
.to_can_run
= debug_to_can_run
;
4067 current_target
.to_stop
= debug_to_stop
;
4068 current_target
.to_rcmd
= debug_to_rcmd
;
4069 current_target
.to_pid_to_exec_file
= debug_to_pid_to_exec_file
;
4070 current_target
.to_thread_architecture
= debug_to_thread_architecture
;
4074 static char targ_desc
[] =
4075 "Names of targets and files being debugged.\nShows the entire \
4076 stack of targets currently in use (including the exec-file,\n\
4077 core-file, and process, if any), as well as the symbol file name.";
4080 default_rcmd (struct target_ops
*self
, char *command
, struct ui_file
*output
)
4082 error (_("\"monitor\" command not supported by this target."));
4086 do_monitor_command (char *cmd
,
4089 target_rcmd (cmd
, gdb_stdtarg
);
4092 /* Print the name of each layers of our target stack. */
4095 maintenance_print_target_stack (char *cmd
, int from_tty
)
4097 struct target_ops
*t
;
4099 printf_filtered (_("The current target stack is:\n"));
4101 for (t
= target_stack
; t
!= NULL
; t
= t
->beneath
)
4103 printf_filtered (" - %s (%s)\n", t
->to_shortname
, t
->to_longname
);
4107 /* Controls if async mode is permitted. */
4108 int target_async_permitted
= 0;
4110 /* The set command writes to this variable. If the inferior is
4111 executing, target_async_permitted is *not* updated. */
4112 static int target_async_permitted_1
= 0;
4115 set_target_async_command (char *args
, int from_tty
,
4116 struct cmd_list_element
*c
)
4118 if (have_live_inferiors ())
4120 target_async_permitted_1
= target_async_permitted
;
4121 error (_("Cannot change this setting while the inferior is running."));
4124 target_async_permitted
= target_async_permitted_1
;
4128 show_target_async_command (struct ui_file
*file
, int from_tty
,
4129 struct cmd_list_element
*c
,
4132 fprintf_filtered (file
,
4133 _("Controlling the inferior in "
4134 "asynchronous mode is %s.\n"), value
);
4137 /* Temporary copies of permission settings. */
4139 static int may_write_registers_1
= 1;
4140 static int may_write_memory_1
= 1;
4141 static int may_insert_breakpoints_1
= 1;
4142 static int may_insert_tracepoints_1
= 1;
4143 static int may_insert_fast_tracepoints_1
= 1;
4144 static int may_stop_1
= 1;
4146 /* Make the user-set values match the real values again. */
4149 update_target_permissions (void)
4151 may_write_registers_1
= may_write_registers
;
4152 may_write_memory_1
= may_write_memory
;
4153 may_insert_breakpoints_1
= may_insert_breakpoints
;
4154 may_insert_tracepoints_1
= may_insert_tracepoints
;
4155 may_insert_fast_tracepoints_1
= may_insert_fast_tracepoints
;
4156 may_stop_1
= may_stop
;
4159 /* The one function handles (most of) the permission flags in the same
4163 set_target_permissions (char *args
, int from_tty
,
4164 struct cmd_list_element
*c
)
4166 if (target_has_execution
)
4168 update_target_permissions ();
4169 error (_("Cannot change this setting while the inferior is running."));
4172 /* Make the real values match the user-changed values. */
4173 may_write_registers
= may_write_registers_1
;
4174 may_insert_breakpoints
= may_insert_breakpoints_1
;
4175 may_insert_tracepoints
= may_insert_tracepoints_1
;
4176 may_insert_fast_tracepoints
= may_insert_fast_tracepoints_1
;
4177 may_stop
= may_stop_1
;
4178 update_observer_mode ();
4181 /* Set memory write permission independently of observer mode. */
4184 set_write_memory_permission (char *args
, int from_tty
,
4185 struct cmd_list_element
*c
)
4187 /* Make the real values match the user-changed values. */
4188 may_write_memory
= may_write_memory_1
;
4189 update_observer_mode ();
4194 initialize_targets (void)
4196 init_dummy_target ();
4197 push_target (&dummy_target
);
4199 add_info ("target", target_info
, targ_desc
);
4200 add_info ("files", target_info
, targ_desc
);
4202 add_setshow_zuinteger_cmd ("target", class_maintenance
, &targetdebug
, _("\
4203 Set target debugging."), _("\
4204 Show target debugging."), _("\
4205 When non-zero, target debugging is enabled. Higher numbers are more\n\
4206 verbose. Changes do not take effect until the next \"run\" or \"target\"\n\
4210 &setdebuglist
, &showdebuglist
);
4212 add_setshow_boolean_cmd ("trust-readonly-sections", class_support
,
4213 &trust_readonly
, _("\
4214 Set mode for reading from readonly sections."), _("\
4215 Show mode for reading from readonly sections."), _("\
4216 When this mode is on, memory reads from readonly sections (such as .text)\n\
4217 will be read from the object file instead of from the target. This will\n\
4218 result in significant performance improvement for remote targets."),
4220 show_trust_readonly
,
4221 &setlist
, &showlist
);
4223 add_com ("monitor", class_obscure
, do_monitor_command
,
4224 _("Send a command to the remote monitor (remote targets only)."));
4226 add_cmd ("target-stack", class_maintenance
, maintenance_print_target_stack
,
4227 _("Print the name of each layer of the internal target stack."),
4228 &maintenanceprintlist
);
4230 add_setshow_boolean_cmd ("target-async", no_class
,
4231 &target_async_permitted_1
, _("\
4232 Set whether gdb controls the inferior in asynchronous mode."), _("\
4233 Show whether gdb controls the inferior in asynchronous mode."), _("\
4234 Tells gdb whether to control the inferior in asynchronous mode."),
4235 set_target_async_command
,
4236 show_target_async_command
,
4240 add_setshow_boolean_cmd ("may-write-registers", class_support
,
4241 &may_write_registers_1
, _("\
4242 Set permission to write into registers."), _("\
4243 Show permission to write into registers."), _("\
4244 When this permission is on, GDB may write into the target's registers.\n\
4245 Otherwise, any sort of write attempt will result in an error."),
4246 set_target_permissions
, NULL
,
4247 &setlist
, &showlist
);
4249 add_setshow_boolean_cmd ("may-write-memory", class_support
,
4250 &may_write_memory_1
, _("\
4251 Set permission to write into target memory."), _("\
4252 Show permission to write into target memory."), _("\
4253 When this permission is on, GDB may write into the target's memory.\n\
4254 Otherwise, any sort of write attempt will result in an error."),
4255 set_write_memory_permission
, NULL
,
4256 &setlist
, &showlist
);
4258 add_setshow_boolean_cmd ("may-insert-breakpoints", class_support
,
4259 &may_insert_breakpoints_1
, _("\
4260 Set permission to insert breakpoints in the target."), _("\
4261 Show permission to insert breakpoints in the target."), _("\
4262 When this permission is on, GDB may insert breakpoints in the program.\n\
4263 Otherwise, any sort of insertion attempt will result in an error."),
4264 set_target_permissions
, NULL
,
4265 &setlist
, &showlist
);
4267 add_setshow_boolean_cmd ("may-insert-tracepoints", class_support
,
4268 &may_insert_tracepoints_1
, _("\
4269 Set permission to insert tracepoints in the target."), _("\
4270 Show permission to insert tracepoints in the target."), _("\
4271 When this permission is on, GDB may insert tracepoints in the program.\n\
4272 Otherwise, any sort of insertion attempt will result in an error."),
4273 set_target_permissions
, NULL
,
4274 &setlist
, &showlist
);
4276 add_setshow_boolean_cmd ("may-insert-fast-tracepoints", class_support
,
4277 &may_insert_fast_tracepoints_1
, _("\
4278 Set permission to insert fast tracepoints in the target."), _("\
4279 Show permission to insert fast tracepoints in the target."), _("\
4280 When this permission is on, GDB may insert fast tracepoints.\n\
4281 Otherwise, any sort of insertion attempt will result in an error."),
4282 set_target_permissions
, NULL
,
4283 &setlist
, &showlist
);
4285 add_setshow_boolean_cmd ("may-interrupt", class_support
,
4287 Set permission to interrupt or signal the target."), _("\
4288 Show permission to interrupt or signal the target."), _("\
4289 When this permission is on, GDB may interrupt/stop the target's execution.\n\
4290 Otherwise, any attempt to interrupt or stop will be ignored."),
4291 set_target_permissions
, NULL
,
4292 &setlist
, &showlist
);
4294 add_setshow_boolean_cmd ("auto-connect-native-target", class_support
,
4295 &auto_connect_native_target
, _("\
4296 Set whether GDB may automatically connect to the native target."), _("\
4297 Show whether GDB may automatically connect to the native target."), _("\
4298 When on, and GDB is not connected to a target yet, GDB\n\
4299 attempts \"run\" and other commands with the native target."),
4300 NULL
, show_auto_connect_native_target
,
4301 &setlist
, &showlist
);