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/>. */
24 #include "target-dcache.h"
36 #include "exceptions.h"
37 #include "target-descriptions.h"
38 #include "gdbthread.h"
41 #include "inline-frame.h"
42 #include "tracepoint.h"
43 #include "gdb/fileio.h"
46 #include "target-debug.h"
48 static void target_info (char *, int);
50 static void generic_tls_error (void) ATTRIBUTE_NORETURN
;
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
*, const 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 struct address_space
*default_thread_address_space
82 (struct target_ops
*self
, ptid_t ptid
);
84 static void tcomplain (void) ATTRIBUTE_NORETURN
;
86 static int return_zero (struct target_ops
*);
88 static int return_zero_has_execution (struct target_ops
*, ptid_t
);
90 static void target_command (char *, int);
92 static struct target_ops
*find_default_run_target (char *);
94 static struct gdbarch
*default_thread_architecture (struct target_ops
*ops
,
97 static int dummy_find_memory_regions (struct target_ops
*self
,
98 find_memory_region_ftype ignore1
,
101 static char *dummy_make_corefile_notes (struct target_ops
*self
,
102 bfd
*ignore1
, int *ignore2
);
104 static char *default_pid_to_str (struct target_ops
*ops
, ptid_t ptid
);
106 static enum exec_direction_kind default_execution_direction
107 (struct target_ops
*self
);
109 static CORE_ADDR
default_target_decr_pc_after_break (struct target_ops
*ops
,
110 struct gdbarch
*gdbarch
);
112 static struct target_ops debug_target
;
114 #include "target-delegates.c"
116 static void init_dummy_target (void);
118 static void update_current_target (void);
120 /* Vector of existing target structures. */
121 typedef struct target_ops
*target_ops_p
;
122 DEF_VEC_P (target_ops_p
);
123 static VEC (target_ops_p
) *target_structs
;
125 /* The initial current target, so that there is always a semi-valid
128 static struct target_ops dummy_target
;
130 /* Top of target stack. */
132 static struct target_ops
*target_stack
;
134 /* The target structure we are currently using to talk to a process
135 or file or whatever "inferior" we have. */
137 struct target_ops current_target
;
139 /* Command list for target. */
141 static struct cmd_list_element
*targetlist
= NULL
;
143 /* Nonzero if we should trust readonly sections from the
144 executable when reading memory. */
146 static int trust_readonly
= 0;
148 /* Nonzero if we should show true memory content including
149 memory breakpoint inserted by gdb. */
151 static int show_memory_breakpoints
= 0;
153 /* These globals control whether GDB attempts to perform these
154 operations; they are useful for targets that need to prevent
155 inadvertant disruption, such as in non-stop mode. */
157 int may_write_registers
= 1;
159 int may_write_memory
= 1;
161 int may_insert_breakpoints
= 1;
163 int may_insert_tracepoints
= 1;
165 int may_insert_fast_tracepoints
= 1;
169 /* Non-zero if we want to see trace of target level stuff. */
171 static unsigned int targetdebug
= 0;
174 set_targetdebug (char *args
, int from_tty
, struct cmd_list_element
*c
)
176 update_current_target ();
180 show_targetdebug (struct ui_file
*file
, int from_tty
,
181 struct cmd_list_element
*c
, const char *value
)
183 fprintf_filtered (file
, _("Target debugging is %s.\n"), value
);
186 static void setup_target_debug (void);
188 /* The user just typed 'target' without the name of a target. */
191 target_command (char *arg
, int from_tty
)
193 fputs_filtered ("Argument required (target name). Try `help target'\n",
197 /* Default target_has_* methods for process_stratum targets. */
200 default_child_has_all_memory (struct target_ops
*ops
)
202 /* If no inferior selected, then we can't read memory here. */
203 if (ptid_equal (inferior_ptid
, null_ptid
))
210 default_child_has_memory (struct target_ops
*ops
)
212 /* If no inferior selected, then we can't read memory here. */
213 if (ptid_equal (inferior_ptid
, null_ptid
))
220 default_child_has_stack (struct target_ops
*ops
)
222 /* If no inferior selected, there's no stack. */
223 if (ptid_equal (inferior_ptid
, null_ptid
))
230 default_child_has_registers (struct target_ops
*ops
)
232 /* Can't read registers from no inferior. */
233 if (ptid_equal (inferior_ptid
, null_ptid
))
240 default_child_has_execution (struct target_ops
*ops
, ptid_t the_ptid
)
242 /* If there's no thread selected, then we can't make it run through
244 if (ptid_equal (the_ptid
, null_ptid
))
252 target_has_all_memory_1 (void)
254 struct target_ops
*t
;
256 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
257 if (t
->to_has_all_memory (t
))
264 target_has_memory_1 (void)
266 struct target_ops
*t
;
268 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
269 if (t
->to_has_memory (t
))
276 target_has_stack_1 (void)
278 struct target_ops
*t
;
280 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
281 if (t
->to_has_stack (t
))
288 target_has_registers_1 (void)
290 struct target_ops
*t
;
292 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
293 if (t
->to_has_registers (t
))
300 target_has_execution_1 (ptid_t the_ptid
)
302 struct target_ops
*t
;
304 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
305 if (t
->to_has_execution (t
, the_ptid
))
312 target_has_execution_current (void)
314 return target_has_execution_1 (inferior_ptid
);
317 /* Complete initialization of T. This ensures that various fields in
318 T are set, if needed by the target implementation. */
321 complete_target_initialization (struct target_ops
*t
)
323 /* Provide default values for all "must have" methods. */
325 if (t
->to_has_all_memory
== NULL
)
326 t
->to_has_all_memory
= return_zero
;
328 if (t
->to_has_memory
== NULL
)
329 t
->to_has_memory
= return_zero
;
331 if (t
->to_has_stack
== NULL
)
332 t
->to_has_stack
= return_zero
;
334 if (t
->to_has_registers
== NULL
)
335 t
->to_has_registers
= return_zero
;
337 if (t
->to_has_execution
== NULL
)
338 t
->to_has_execution
= return_zero_has_execution
;
340 /* These methods can be called on an unpushed target and so require
341 a default implementation if the target might plausibly be the
342 default run target. */
343 gdb_assert (t
->to_can_run
== NULL
|| (t
->to_can_async_p
!= NULL
344 && t
->to_supports_non_stop
!= NULL
));
346 install_delegators (t
);
349 /* This is used to implement the various target commands. */
352 open_target (char *args
, int from_tty
, struct cmd_list_element
*command
)
354 struct target_ops
*ops
= get_cmd_context (command
);
357 fprintf_unfiltered (gdb_stdlog
, "-> %s->to_open (...)\n",
360 ops
->to_open (args
, from_tty
);
363 fprintf_unfiltered (gdb_stdlog
, "<- %s->to_open (%s, %d)\n",
364 ops
->to_shortname
, args
, from_tty
);
367 /* Add possible target architecture T to the list and add a new
368 command 'target T->to_shortname'. Set COMPLETER as the command's
369 completer if not NULL. */
372 add_target_with_completer (struct target_ops
*t
,
373 completer_ftype
*completer
)
375 struct cmd_list_element
*c
;
377 complete_target_initialization (t
);
379 VEC_safe_push (target_ops_p
, target_structs
, t
);
381 if (targetlist
== NULL
)
382 add_prefix_cmd ("target", class_run
, target_command
, _("\
383 Connect to a target machine or process.\n\
384 The first argument is the type or protocol of the target machine.\n\
385 Remaining arguments are interpreted by the target protocol. For more\n\
386 information on the arguments for a particular protocol, type\n\
387 `help target ' followed by the protocol name."),
388 &targetlist
, "target ", 0, &cmdlist
);
389 c
= add_cmd (t
->to_shortname
, no_class
, NULL
, t
->to_doc
, &targetlist
);
390 set_cmd_sfunc (c
, open_target
);
391 set_cmd_context (c
, t
);
392 if (completer
!= NULL
)
393 set_cmd_completer (c
, completer
);
396 /* Add a possible target architecture to the list. */
399 add_target (struct target_ops
*t
)
401 add_target_with_completer (t
, NULL
);
407 add_deprecated_target_alias (struct target_ops
*t
, char *alias
)
409 struct cmd_list_element
*c
;
412 /* If we use add_alias_cmd, here, we do not get the deprecated warning,
414 c
= add_cmd (alias
, no_class
, NULL
, t
->to_doc
, &targetlist
);
415 set_cmd_sfunc (c
, open_target
);
416 set_cmd_context (c
, t
);
417 alt
= xstrprintf ("target %s", t
->to_shortname
);
418 deprecate_cmd (c
, alt
);
426 current_target
.to_kill (¤t_target
);
430 target_load (const char *arg
, int from_tty
)
432 target_dcache_invalidate ();
433 (*current_target
.to_load
) (¤t_target
, arg
, from_tty
);
437 target_terminal_inferior (void)
439 /* A background resume (``run&'') should leave GDB in control of the
440 terminal. Use target_can_async_p, not target_is_async_p, since at
441 this point the target is not async yet. However, if sync_execution
442 is not set, we know it will become async prior to resume. */
443 if (target_can_async_p () && !sync_execution
)
446 /* If GDB is resuming the inferior in the foreground, install
447 inferior's terminal modes. */
448 (*current_target
.to_terminal_inferior
) (¤t_target
);
454 target_supports_terminal_ours (void)
456 struct target_ops
*t
;
458 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
460 if (t
->to_terminal_ours
!= delegate_terminal_ours
461 && t
->to_terminal_ours
!= tdefault_terminal_ours
)
471 error (_("You can't do that when your target is `%s'"),
472 current_target
.to_shortname
);
478 error (_("You can't do that without a process to debug."));
482 default_terminal_info (struct target_ops
*self
, const char *args
, int from_tty
)
484 printf_unfiltered (_("No saved terminal information.\n"));
487 /* A default implementation for the to_get_ada_task_ptid target method.
489 This function builds the PTID by using both LWP and TID as part of
490 the PTID lwp and tid elements. The pid used is the pid of the
494 default_get_ada_task_ptid (struct target_ops
*self
, long lwp
, long tid
)
496 return ptid_build (ptid_get_pid (inferior_ptid
), lwp
, tid
);
499 static enum exec_direction_kind
500 default_execution_direction (struct target_ops
*self
)
502 if (!target_can_execute_reverse
)
504 else if (!target_can_async_p ())
507 gdb_assert_not_reached ("\
508 to_execution_direction must be implemented for reverse async");
511 /* Go through the target stack from top to bottom, copying over zero
512 entries in current_target, then filling in still empty entries. In
513 effect, we are doing class inheritance through the pushed target
516 NOTE: cagney/2003-10-17: The problem with this inheritance, as it
517 is currently implemented, is that it discards any knowledge of
518 which target an inherited method originally belonged to.
519 Consequently, new new target methods should instead explicitly and
520 locally search the target stack for the target that can handle the
524 update_current_target (void)
526 struct target_ops
*t
;
528 /* First, reset current's contents. */
529 memset (¤t_target
, 0, sizeof (current_target
));
531 /* Install the delegators. */
532 install_delegators (¤t_target
);
534 current_target
.to_stratum
= target_stack
->to_stratum
;
536 #define INHERIT(FIELD, TARGET) \
537 if (!current_target.FIELD) \
538 current_target.FIELD = (TARGET)->FIELD
540 /* Do not add any new INHERITs here. Instead, use the delegation
541 mechanism provided by make-target-delegates. */
542 for (t
= target_stack
; t
; t
= t
->beneath
)
544 INHERIT (to_shortname
, t
);
545 INHERIT (to_longname
, t
);
546 INHERIT (to_attach_no_wait
, t
);
547 INHERIT (to_have_steppable_watchpoint
, t
);
548 INHERIT (to_have_continuable_watchpoint
, t
);
549 INHERIT (to_has_thread_control
, t
);
553 /* Finally, position the target-stack beneath the squashed
554 "current_target". That way code looking for a non-inherited
555 target method can quickly and simply find it. */
556 current_target
.beneath
= target_stack
;
559 setup_target_debug ();
562 /* Push a new target type into the stack of the existing target accessors,
563 possibly superseding some of the existing accessors.
565 Rather than allow an empty stack, we always have the dummy target at
566 the bottom stratum, so we can call the function vectors without
570 push_target (struct target_ops
*t
)
572 struct target_ops
**cur
;
574 /* Check magic number. If wrong, it probably means someone changed
575 the struct definition, but not all the places that initialize one. */
576 if (t
->to_magic
!= OPS_MAGIC
)
578 fprintf_unfiltered (gdb_stderr
,
579 "Magic number of %s target struct wrong\n",
581 internal_error (__FILE__
, __LINE__
,
582 _("failed internal consistency check"));
585 /* Find the proper stratum to install this target in. */
586 for (cur
= &target_stack
; (*cur
) != NULL
; cur
= &(*cur
)->beneath
)
588 if ((int) (t
->to_stratum
) >= (int) (*cur
)->to_stratum
)
592 /* If there's already targets at this stratum, remove them. */
593 /* FIXME: cagney/2003-10-15: I think this should be popping all
594 targets to CUR, and not just those at this stratum level. */
595 while ((*cur
) != NULL
&& t
->to_stratum
== (*cur
)->to_stratum
)
597 /* There's already something at this stratum level. Close it,
598 and un-hook it from the stack. */
599 struct target_ops
*tmp
= (*cur
);
601 (*cur
) = (*cur
)->beneath
;
606 /* We have removed all targets in our stratum, now add the new one. */
610 update_current_target ();
613 /* Remove a target_ops vector from the stack, wherever it may be.
614 Return how many times it was removed (0 or 1). */
617 unpush_target (struct target_ops
*t
)
619 struct target_ops
**cur
;
620 struct target_ops
*tmp
;
622 if (t
->to_stratum
== dummy_stratum
)
623 internal_error (__FILE__
, __LINE__
,
624 _("Attempt to unpush the dummy target"));
626 /* Look for the specified target. Note that we assume that a target
627 can only occur once in the target stack. */
629 for (cur
= &target_stack
; (*cur
) != NULL
; cur
= &(*cur
)->beneath
)
635 /* If we don't find target_ops, quit. Only open targets should be
640 /* Unchain the target. */
642 (*cur
) = (*cur
)->beneath
;
645 update_current_target ();
647 /* Finally close the target. Note we do this after unchaining, so
648 any target method calls from within the target_close
649 implementation don't end up in T anymore. */
656 pop_all_targets_above (enum strata above_stratum
)
658 while ((int) (current_target
.to_stratum
) > (int) above_stratum
)
660 if (!unpush_target (target_stack
))
662 fprintf_unfiltered (gdb_stderr
,
663 "pop_all_targets couldn't find target %s\n",
664 target_stack
->to_shortname
);
665 internal_error (__FILE__
, __LINE__
,
666 _("failed internal consistency check"));
673 pop_all_targets (void)
675 pop_all_targets_above (dummy_stratum
);
678 /* Return 1 if T is now pushed in the target stack. Return 0 otherwise. */
681 target_is_pushed (struct target_ops
*t
)
683 struct target_ops
*cur
;
685 /* Check magic number. If wrong, it probably means someone changed
686 the struct definition, but not all the places that initialize one. */
687 if (t
->to_magic
!= OPS_MAGIC
)
689 fprintf_unfiltered (gdb_stderr
,
690 "Magic number of %s target struct wrong\n",
692 internal_error (__FILE__
, __LINE__
,
693 _("failed internal consistency check"));
696 for (cur
= target_stack
; cur
!= NULL
; cur
= cur
->beneath
)
703 /* Default implementation of to_get_thread_local_address. */
706 generic_tls_error (void)
708 throw_error (TLS_GENERIC_ERROR
,
709 _("Cannot find thread-local variables on this target"));
712 /* Using the objfile specified in OBJFILE, find the address for the
713 current thread's thread-local storage with offset OFFSET. */
715 target_translate_tls_address (struct objfile
*objfile
, CORE_ADDR offset
)
717 volatile CORE_ADDR addr
= 0;
718 struct target_ops
*target
= ¤t_target
;
720 if (gdbarch_fetch_tls_load_module_address_p (target_gdbarch ()))
722 ptid_t ptid
= inferior_ptid
;
723 volatile struct gdb_exception ex
;
725 TRY_CATCH (ex
, RETURN_MASK_ALL
)
729 /* Fetch the load module address for this objfile. */
730 lm_addr
= gdbarch_fetch_tls_load_module_address (target_gdbarch (),
733 addr
= target
->to_get_thread_local_address (target
, ptid
,
736 /* If an error occurred, print TLS related messages here. Otherwise,
737 throw the error to some higher catcher. */
740 int objfile_is_library
= (objfile
->flags
& OBJF_SHARED
);
744 case TLS_NO_LIBRARY_SUPPORT_ERROR
:
745 error (_("Cannot find thread-local variables "
746 "in this thread library."));
748 case TLS_LOAD_MODULE_NOT_FOUND_ERROR
:
749 if (objfile_is_library
)
750 error (_("Cannot find shared library `%s' in dynamic"
751 " linker's load module list"), objfile_name (objfile
));
753 error (_("Cannot find executable file `%s' in dynamic"
754 " linker's load module list"), objfile_name (objfile
));
756 case TLS_NOT_ALLOCATED_YET_ERROR
:
757 if (objfile_is_library
)
758 error (_("The inferior has not yet allocated storage for"
759 " thread-local variables in\n"
760 "the shared library `%s'\n"
762 objfile_name (objfile
), target_pid_to_str (ptid
));
764 error (_("The inferior has not yet allocated storage for"
765 " thread-local variables in\n"
766 "the executable `%s'\n"
768 objfile_name (objfile
), target_pid_to_str (ptid
));
770 case TLS_GENERIC_ERROR
:
771 if (objfile_is_library
)
772 error (_("Cannot find thread-local storage for %s, "
773 "shared library %s:\n%s"),
774 target_pid_to_str (ptid
),
775 objfile_name (objfile
), ex
.message
);
777 error (_("Cannot find thread-local storage for %s, "
778 "executable file %s:\n%s"),
779 target_pid_to_str (ptid
),
780 objfile_name (objfile
), ex
.message
);
783 throw_exception (ex
);
788 /* It wouldn't be wrong here to try a gdbarch method, too; finding
789 TLS is an ABI-specific thing. But we don't do that yet. */
791 error (_("Cannot find thread-local variables on this target"));
797 target_xfer_status_to_string (enum target_xfer_status status
)
799 #define CASE(X) case X: return #X
802 CASE(TARGET_XFER_E_IO
);
803 CASE(TARGET_XFER_UNAVAILABLE
);
812 #define MIN(A, B) (((A) <= (B)) ? (A) : (B))
814 /* target_read_string -- read a null terminated string, up to LEN bytes,
815 from MEMADDR in target. Set *ERRNOP to the errno code, or 0 if successful.
816 Set *STRING to a pointer to malloc'd memory containing the data; the caller
817 is responsible for freeing it. Return the number of bytes successfully
821 target_read_string (CORE_ADDR memaddr
, char **string
, int len
, int *errnop
)
827 int buffer_allocated
;
829 unsigned int nbytes_read
= 0;
833 /* Small for testing. */
834 buffer_allocated
= 4;
835 buffer
= xmalloc (buffer_allocated
);
840 tlen
= MIN (len
, 4 - (memaddr
& 3));
841 offset
= memaddr
& 3;
843 errcode
= target_read_memory (memaddr
& ~3, buf
, sizeof buf
);
846 /* The transfer request might have crossed the boundary to an
847 unallocated region of memory. Retry the transfer, requesting
851 errcode
= target_read_memory (memaddr
, buf
, 1);
856 if (bufptr
- buffer
+ tlen
> buffer_allocated
)
860 bytes
= bufptr
- buffer
;
861 buffer_allocated
*= 2;
862 buffer
= xrealloc (buffer
, buffer_allocated
);
863 bufptr
= buffer
+ bytes
;
866 for (i
= 0; i
< tlen
; i
++)
868 *bufptr
++ = buf
[i
+ offset
];
869 if (buf
[i
+ offset
] == '\000')
871 nbytes_read
+= i
+ 1;
887 struct target_section_table
*
888 target_get_section_table (struct target_ops
*target
)
890 return (*target
->to_get_section_table
) (target
);
893 /* Find a section containing ADDR. */
895 struct target_section
*
896 target_section_by_addr (struct target_ops
*target
, CORE_ADDR addr
)
898 struct target_section_table
*table
= target_get_section_table (target
);
899 struct target_section
*secp
;
904 for (secp
= table
->sections
; secp
< table
->sections_end
; secp
++)
906 if (addr
>= secp
->addr
&& addr
< secp
->endaddr
)
913 /* Helper for the memory xfer routines. Checks the attributes of the
914 memory region of MEMADDR against the read or write being attempted.
915 If the access is permitted returns true, otherwise returns false.
916 REGION_P is an optional output parameter. If not-NULL, it is
917 filled with a pointer to the memory region of MEMADDR. REG_LEN
918 returns LEN trimmed to the end of the region. This is how much the
919 caller can continue requesting, if the access is permitted. A
920 single xfer request must not straddle memory region boundaries. */
923 memory_xfer_check_region (gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
924 ULONGEST memaddr
, ULONGEST len
, ULONGEST
*reg_len
,
925 struct mem_region
**region_p
)
927 struct mem_region
*region
;
929 region
= lookup_mem_region (memaddr
);
931 if (region_p
!= NULL
)
934 switch (region
->attrib
.mode
)
937 if (writebuf
!= NULL
)
947 /* We only support writing to flash during "load" for now. */
948 if (writebuf
!= NULL
)
949 error (_("Writing to flash memory forbidden in this context"));
956 /* region->hi == 0 means there's no upper bound. */
957 if (memaddr
+ len
< region
->hi
|| region
->hi
== 0)
960 *reg_len
= region
->hi
- memaddr
;
965 /* Read memory from more than one valid target. A core file, for
966 instance, could have some of memory but delegate other bits to
967 the target below it. So, we must manually try all targets. */
969 static enum target_xfer_status
970 raw_memory_xfer_partial (struct target_ops
*ops
, gdb_byte
*readbuf
,
971 const gdb_byte
*writebuf
, ULONGEST memaddr
, LONGEST len
,
972 ULONGEST
*xfered_len
)
974 enum target_xfer_status res
;
978 res
= ops
->to_xfer_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
979 readbuf
, writebuf
, memaddr
, len
,
981 if (res
== TARGET_XFER_OK
)
984 /* Stop if the target reports that the memory is not available. */
985 if (res
== TARGET_XFER_UNAVAILABLE
)
988 /* We want to continue past core files to executables, but not
989 past a running target's memory. */
990 if (ops
->to_has_all_memory (ops
))
997 /* The cache works at the raw memory level. Make sure the cache
998 gets updated with raw contents no matter what kind of memory
999 object was originally being written. Note we do write-through
1000 first, so that if it fails, we don't write to the cache contents
1001 that never made it to the target. */
1002 if (writebuf
!= NULL
1003 && !ptid_equal (inferior_ptid
, null_ptid
)
1004 && target_dcache_init_p ()
1005 && (stack_cache_enabled_p () || code_cache_enabled_p ()))
1007 DCACHE
*dcache
= target_dcache_get ();
1009 /* Note that writing to an area of memory which wasn't present
1010 in the cache doesn't cause it to be loaded in. */
1011 dcache_update (dcache
, res
, memaddr
, writebuf
, *xfered_len
);
1017 /* Perform a partial memory transfer.
1018 For docs see target.h, to_xfer_partial. */
1020 static enum target_xfer_status
1021 memory_xfer_partial_1 (struct target_ops
*ops
, enum target_object object
,
1022 gdb_byte
*readbuf
, const gdb_byte
*writebuf
, ULONGEST memaddr
,
1023 ULONGEST len
, ULONGEST
*xfered_len
)
1025 enum target_xfer_status res
;
1027 struct mem_region
*region
;
1028 struct inferior
*inf
;
1030 /* For accesses to unmapped overlay sections, read directly from
1031 files. Must do this first, as MEMADDR may need adjustment. */
1032 if (readbuf
!= NULL
&& overlay_debugging
)
1034 struct obj_section
*section
= find_pc_overlay (memaddr
);
1036 if (pc_in_unmapped_range (memaddr
, section
))
1038 struct target_section_table
*table
1039 = target_get_section_table (ops
);
1040 const char *section_name
= section
->the_bfd_section
->name
;
1042 memaddr
= overlay_mapped_address (memaddr
, section
);
1043 return section_table_xfer_memory_partial (readbuf
, writebuf
,
1044 memaddr
, len
, xfered_len
,
1046 table
->sections_end
,
1051 /* Try the executable files, if "trust-readonly-sections" is set. */
1052 if (readbuf
!= NULL
&& trust_readonly
)
1054 struct target_section
*secp
;
1055 struct target_section_table
*table
;
1057 secp
= target_section_by_addr (ops
, memaddr
);
1059 && (bfd_get_section_flags (secp
->the_bfd_section
->owner
,
1060 secp
->the_bfd_section
)
1063 table
= target_get_section_table (ops
);
1064 return section_table_xfer_memory_partial (readbuf
, writebuf
,
1065 memaddr
, len
, xfered_len
,
1067 table
->sections_end
,
1072 /* Try GDB's internal data cache. */
1074 if (!memory_xfer_check_region (readbuf
, writebuf
, memaddr
, len
, ®_len
,
1076 return TARGET_XFER_E_IO
;
1078 if (!ptid_equal (inferior_ptid
, null_ptid
))
1079 inf
= find_inferior_pid (ptid_get_pid (inferior_ptid
));
1085 /* The dcache reads whole cache lines; that doesn't play well
1086 with reading from a trace buffer, because reading outside of
1087 the collected memory range fails. */
1088 && get_traceframe_number () == -1
1089 && (region
->attrib
.cache
1090 || (stack_cache_enabled_p () && object
== TARGET_OBJECT_STACK_MEMORY
)
1091 || (code_cache_enabled_p () && object
== TARGET_OBJECT_CODE_MEMORY
)))
1093 DCACHE
*dcache
= target_dcache_get_or_init ();
1095 return dcache_read_memory_partial (ops
, dcache
, memaddr
, readbuf
,
1096 reg_len
, xfered_len
);
1099 /* If none of those methods found the memory we wanted, fall back
1100 to a target partial transfer. Normally a single call to
1101 to_xfer_partial is enough; if it doesn't recognize an object
1102 it will call the to_xfer_partial of the next target down.
1103 But for memory this won't do. Memory is the only target
1104 object which can be read from more than one valid target.
1105 A core file, for instance, could have some of memory but
1106 delegate other bits to the target below it. So, we must
1107 manually try all targets. */
1109 res
= raw_memory_xfer_partial (ops
, readbuf
, writebuf
, memaddr
, reg_len
,
1112 /* If we still haven't got anything, return the last error. We
1117 /* Perform a partial memory transfer. For docs see target.h,
1120 static enum target_xfer_status
1121 memory_xfer_partial (struct target_ops
*ops
, enum target_object object
,
1122 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1123 ULONGEST memaddr
, ULONGEST len
, ULONGEST
*xfered_len
)
1125 enum target_xfer_status res
;
1127 /* Zero length requests are ok and require no work. */
1129 return TARGET_XFER_EOF
;
1131 /* Fill in READBUF with breakpoint shadows, or WRITEBUF with
1132 breakpoint insns, thus hiding out from higher layers whether
1133 there are software breakpoints inserted in the code stream. */
1134 if (readbuf
!= NULL
)
1136 res
= memory_xfer_partial_1 (ops
, object
, readbuf
, NULL
, memaddr
, len
,
1139 if (res
== TARGET_XFER_OK
&& !show_memory_breakpoints
)
1140 breakpoint_xfer_memory (readbuf
, NULL
, NULL
, memaddr
, *xfered_len
);
1145 struct cleanup
*old_chain
;
1147 /* A large write request is likely to be partially satisfied
1148 by memory_xfer_partial_1. We will continually malloc
1149 and free a copy of the entire write request for breakpoint
1150 shadow handling even though we only end up writing a small
1151 subset of it. Cap writes to 4KB to mitigate this. */
1152 len
= min (4096, len
);
1154 buf
= xmalloc (len
);
1155 old_chain
= make_cleanup (xfree
, buf
);
1156 memcpy (buf
, writebuf
, len
);
1158 breakpoint_xfer_memory (NULL
, buf
, writebuf
, memaddr
, len
);
1159 res
= memory_xfer_partial_1 (ops
, object
, NULL
, buf
, memaddr
, len
,
1162 do_cleanups (old_chain
);
1169 restore_show_memory_breakpoints (void *arg
)
1171 show_memory_breakpoints
= (uintptr_t) arg
;
1175 make_show_memory_breakpoints_cleanup (int show
)
1177 int current
= show_memory_breakpoints
;
1179 show_memory_breakpoints
= show
;
1180 return make_cleanup (restore_show_memory_breakpoints
,
1181 (void *) (uintptr_t) current
);
1184 /* For docs see target.h, to_xfer_partial. */
1186 enum target_xfer_status
1187 target_xfer_partial (struct target_ops
*ops
,
1188 enum target_object object
, const char *annex
,
1189 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1190 ULONGEST offset
, ULONGEST len
,
1191 ULONGEST
*xfered_len
)
1193 enum target_xfer_status retval
;
1195 gdb_assert (ops
->to_xfer_partial
!= NULL
);
1197 /* Transfer is done when LEN is zero. */
1199 return TARGET_XFER_EOF
;
1201 if (writebuf
&& !may_write_memory
)
1202 error (_("Writing to memory is not allowed (addr %s, len %s)"),
1203 core_addr_to_string_nz (offset
), plongest (len
));
1207 /* If this is a memory transfer, let the memory-specific code
1208 have a look at it instead. Memory transfers are more
1210 if (object
== TARGET_OBJECT_MEMORY
|| object
== TARGET_OBJECT_STACK_MEMORY
1211 || object
== TARGET_OBJECT_CODE_MEMORY
)
1212 retval
= memory_xfer_partial (ops
, object
, readbuf
,
1213 writebuf
, offset
, len
, xfered_len
);
1214 else if (object
== TARGET_OBJECT_RAW_MEMORY
)
1216 /* Skip/avoid accessing the target if the memory region
1217 attributes block the access. Check this here instead of in
1218 raw_memory_xfer_partial as otherwise we'd end up checking
1219 this twice in the case of the memory_xfer_partial path is
1220 taken; once before checking the dcache, and another in the
1221 tail call to raw_memory_xfer_partial. */
1222 if (!memory_xfer_check_region (readbuf
, writebuf
, offset
, len
, &len
,
1224 return TARGET_XFER_E_IO
;
1226 /* Request the normal memory object from other layers. */
1227 retval
= raw_memory_xfer_partial (ops
, readbuf
, writebuf
, offset
, len
,
1231 retval
= ops
->to_xfer_partial (ops
, object
, annex
, readbuf
,
1232 writebuf
, offset
, len
, xfered_len
);
1236 const unsigned char *myaddr
= NULL
;
1238 fprintf_unfiltered (gdb_stdlog
,
1239 "%s:target_xfer_partial "
1240 "(%d, %s, %s, %s, %s, %s) = %d, %s",
1243 (annex
? annex
: "(null)"),
1244 host_address_to_string (readbuf
),
1245 host_address_to_string (writebuf
),
1246 core_addr_to_string_nz (offset
),
1247 pulongest (len
), retval
,
1248 pulongest (*xfered_len
));
1254 if (retval
== TARGET_XFER_OK
&& myaddr
!= NULL
)
1258 fputs_unfiltered (", bytes =", gdb_stdlog
);
1259 for (i
= 0; i
< *xfered_len
; i
++)
1261 if ((((intptr_t) &(myaddr
[i
])) & 0xf) == 0)
1263 if (targetdebug
< 2 && i
> 0)
1265 fprintf_unfiltered (gdb_stdlog
, " ...");
1268 fprintf_unfiltered (gdb_stdlog
, "\n");
1271 fprintf_unfiltered (gdb_stdlog
, " %02x", myaddr
[i
] & 0xff);
1275 fputc_unfiltered ('\n', gdb_stdlog
);
1278 /* Check implementations of to_xfer_partial update *XFERED_LEN
1279 properly. Do assertion after printing debug messages, so that we
1280 can find more clues on assertion failure from debugging messages. */
1281 if (retval
== TARGET_XFER_OK
|| retval
== TARGET_XFER_UNAVAILABLE
)
1282 gdb_assert (*xfered_len
> 0);
1287 /* Read LEN bytes of target memory at address MEMADDR, placing the
1288 results in GDB's memory at MYADDR. Returns either 0 for success or
1289 TARGET_XFER_E_IO if any error occurs.
1291 If an error occurs, no guarantee is made about the contents of the data at
1292 MYADDR. In particular, the caller should not depend upon partial reads
1293 filling the buffer with good data. There is no way for the caller to know
1294 how much good data might have been transfered anyway. Callers that can
1295 deal with partial reads should call target_read (which will retry until
1296 it makes no progress, and then return how much was transferred). */
1299 target_read_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1301 /* Dispatch to the topmost target, not the flattened current_target.
1302 Memory accesses check target->to_has_(all_)memory, and the
1303 flattened target doesn't inherit those. */
1304 if (target_read (current_target
.beneath
, TARGET_OBJECT_MEMORY
, NULL
,
1305 myaddr
, memaddr
, len
) == len
)
1308 return TARGET_XFER_E_IO
;
1311 /* See target/target.h. */
1314 target_read_uint32 (CORE_ADDR memaddr
, uint32_t *result
)
1319 r
= target_read_memory (memaddr
, buf
, sizeof buf
);
1322 *result
= extract_unsigned_integer (buf
, sizeof buf
,
1323 gdbarch_byte_order (target_gdbarch ()));
1327 /* Like target_read_memory, but specify explicitly that this is a read
1328 from the target's raw memory. That is, this read bypasses the
1329 dcache, breakpoint shadowing, etc. */
1332 target_read_raw_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1334 /* See comment in target_read_memory about why the request starts at
1335 current_target.beneath. */
1336 if (target_read (current_target
.beneath
, TARGET_OBJECT_RAW_MEMORY
, NULL
,
1337 myaddr
, memaddr
, len
) == len
)
1340 return TARGET_XFER_E_IO
;
1343 /* Like target_read_memory, but specify explicitly that this is a read from
1344 the target's stack. This may trigger different cache behavior. */
1347 target_read_stack (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1349 /* See comment in target_read_memory about why the request starts at
1350 current_target.beneath. */
1351 if (target_read (current_target
.beneath
, TARGET_OBJECT_STACK_MEMORY
, NULL
,
1352 myaddr
, memaddr
, len
) == len
)
1355 return TARGET_XFER_E_IO
;
1358 /* Like target_read_memory, but specify explicitly that this is a read from
1359 the target's code. This may trigger different cache behavior. */
1362 target_read_code (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1364 /* See comment in target_read_memory about why the request starts at
1365 current_target.beneath. */
1366 if (target_read (current_target
.beneath
, TARGET_OBJECT_CODE_MEMORY
, NULL
,
1367 myaddr
, memaddr
, len
) == len
)
1370 return TARGET_XFER_E_IO
;
1373 /* Write LEN bytes from MYADDR to target memory at address MEMADDR.
1374 Returns either 0 for success or TARGET_XFER_E_IO if any
1375 error occurs. If an error occurs, no guarantee is made about how
1376 much data got written. Callers that can deal with partial writes
1377 should call target_write. */
1380 target_write_memory (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ssize_t len
)
1382 /* See comment in target_read_memory about why the request starts at
1383 current_target.beneath. */
1384 if (target_write (current_target
.beneath
, TARGET_OBJECT_MEMORY
, NULL
,
1385 myaddr
, memaddr
, len
) == len
)
1388 return TARGET_XFER_E_IO
;
1391 /* Write LEN bytes from MYADDR to target raw memory at address
1392 MEMADDR. Returns either 0 for success or TARGET_XFER_E_IO
1393 if any error occurs. If an error occurs, no guarantee is made
1394 about how much data got written. Callers that can deal with
1395 partial writes should call target_write. */
1398 target_write_raw_memory (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ssize_t len
)
1400 /* See comment in target_read_memory about why the request starts at
1401 current_target.beneath. */
1402 if (target_write (current_target
.beneath
, TARGET_OBJECT_RAW_MEMORY
, NULL
,
1403 myaddr
, memaddr
, len
) == len
)
1406 return TARGET_XFER_E_IO
;
1409 /* Fetch the target's memory map. */
1412 target_memory_map (void)
1414 VEC(mem_region_s
) *result
;
1415 struct mem_region
*last_one
, *this_one
;
1417 struct target_ops
*t
;
1419 result
= current_target
.to_memory_map (¤t_target
);
1423 qsort (VEC_address (mem_region_s
, result
),
1424 VEC_length (mem_region_s
, result
),
1425 sizeof (struct mem_region
), mem_region_cmp
);
1427 /* Check that regions do not overlap. Simultaneously assign
1428 a numbering for the "mem" commands to use to refer to
1431 for (ix
= 0; VEC_iterate (mem_region_s
, result
, ix
, this_one
); ix
++)
1433 this_one
->number
= ix
;
1435 if (last_one
&& last_one
->hi
> this_one
->lo
)
1437 warning (_("Overlapping regions in memory map: ignoring"));
1438 VEC_free (mem_region_s
, result
);
1441 last_one
= this_one
;
1448 target_flash_erase (ULONGEST address
, LONGEST length
)
1450 current_target
.to_flash_erase (¤t_target
, address
, length
);
1454 target_flash_done (void)
1456 current_target
.to_flash_done (¤t_target
);
1460 show_trust_readonly (struct ui_file
*file
, int from_tty
,
1461 struct cmd_list_element
*c
, const char *value
)
1463 fprintf_filtered (file
,
1464 _("Mode for reading from readonly sections is %s.\n"),
1468 /* Target vector read/write partial wrapper functions. */
1470 static enum target_xfer_status
1471 target_read_partial (struct target_ops
*ops
,
1472 enum target_object object
,
1473 const char *annex
, gdb_byte
*buf
,
1474 ULONGEST offset
, ULONGEST len
,
1475 ULONGEST
*xfered_len
)
1477 return target_xfer_partial (ops
, object
, annex
, buf
, NULL
, offset
, len
,
1481 static enum target_xfer_status
1482 target_write_partial (struct target_ops
*ops
,
1483 enum target_object object
,
1484 const char *annex
, const gdb_byte
*buf
,
1485 ULONGEST offset
, LONGEST len
, ULONGEST
*xfered_len
)
1487 return target_xfer_partial (ops
, object
, annex
, NULL
, buf
, offset
, len
,
1491 /* Wrappers to perform the full transfer. */
1493 /* For docs on target_read see target.h. */
1496 target_read (struct target_ops
*ops
,
1497 enum target_object object
,
1498 const char *annex
, gdb_byte
*buf
,
1499 ULONGEST offset
, LONGEST len
)
1503 while (xfered
< len
)
1505 ULONGEST xfered_len
;
1506 enum target_xfer_status status
;
1508 status
= target_read_partial (ops
, object
, annex
,
1509 (gdb_byte
*) buf
+ xfered
,
1510 offset
+ xfered
, len
- xfered
,
1513 /* Call an observer, notifying them of the xfer progress? */
1514 if (status
== TARGET_XFER_EOF
)
1516 else if (status
== TARGET_XFER_OK
)
1518 xfered
+= xfered_len
;
1528 /* Assuming that the entire [begin, end) range of memory cannot be
1529 read, try to read whatever subrange is possible to read.
1531 The function returns, in RESULT, either zero or one memory block.
1532 If there's a readable subrange at the beginning, it is completely
1533 read and returned. Any further readable subrange will not be read.
1534 Otherwise, if there's a readable subrange at the end, it will be
1535 completely read and returned. Any readable subranges before it
1536 (obviously, not starting at the beginning), will be ignored. In
1537 other cases -- either no readable subrange, or readable subrange(s)
1538 that is neither at the beginning, or end, nothing is returned.
1540 The purpose of this function is to handle a read across a boundary
1541 of accessible memory in a case when memory map is not available.
1542 The above restrictions are fine for this case, but will give
1543 incorrect results if the memory is 'patchy'. However, supporting
1544 'patchy' memory would require trying to read every single byte,
1545 and it seems unacceptable solution. Explicit memory map is
1546 recommended for this case -- and target_read_memory_robust will
1547 take care of reading multiple ranges then. */
1550 read_whatever_is_readable (struct target_ops
*ops
,
1551 ULONGEST begin
, ULONGEST end
,
1552 VEC(memory_read_result_s
) **result
)
1554 gdb_byte
*buf
= xmalloc (end
- begin
);
1555 ULONGEST current_begin
= begin
;
1556 ULONGEST current_end
= end
;
1558 memory_read_result_s r
;
1559 ULONGEST xfered_len
;
1561 /* If we previously failed to read 1 byte, nothing can be done here. */
1562 if (end
- begin
<= 1)
1568 /* Check that either first or the last byte is readable, and give up
1569 if not. This heuristic is meant to permit reading accessible memory
1570 at the boundary of accessible region. */
1571 if (target_read_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1572 buf
, begin
, 1, &xfered_len
) == TARGET_XFER_OK
)
1577 else if (target_read_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1578 buf
+ (end
-begin
) - 1, end
- 1, 1,
1579 &xfered_len
) == TARGET_XFER_OK
)
1590 /* Loop invariant is that the [current_begin, current_end) was previously
1591 found to be not readable as a whole.
1593 Note loop condition -- if the range has 1 byte, we can't divide the range
1594 so there's no point trying further. */
1595 while (current_end
- current_begin
> 1)
1597 ULONGEST first_half_begin
, first_half_end
;
1598 ULONGEST second_half_begin
, second_half_end
;
1600 ULONGEST middle
= current_begin
+ (current_end
- current_begin
)/2;
1604 first_half_begin
= current_begin
;
1605 first_half_end
= middle
;
1606 second_half_begin
= middle
;
1607 second_half_end
= current_end
;
1611 first_half_begin
= middle
;
1612 first_half_end
= current_end
;
1613 second_half_begin
= current_begin
;
1614 second_half_end
= middle
;
1617 xfer
= target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1618 buf
+ (first_half_begin
- begin
),
1620 first_half_end
- first_half_begin
);
1622 if (xfer
== first_half_end
- first_half_begin
)
1624 /* This half reads up fine. So, the error must be in the
1626 current_begin
= second_half_begin
;
1627 current_end
= second_half_end
;
1631 /* This half is not readable. Because we've tried one byte, we
1632 know some part of this half if actually redable. Go to the next
1633 iteration to divide again and try to read.
1635 We don't handle the other half, because this function only tries
1636 to read a single readable subrange. */
1637 current_begin
= first_half_begin
;
1638 current_end
= first_half_end
;
1644 /* The [begin, current_begin) range has been read. */
1646 r
.end
= current_begin
;
1651 /* The [current_end, end) range has been read. */
1652 LONGEST rlen
= end
- current_end
;
1654 r
.data
= xmalloc (rlen
);
1655 memcpy (r
.data
, buf
+ current_end
- begin
, rlen
);
1656 r
.begin
= current_end
;
1660 VEC_safe_push(memory_read_result_s
, (*result
), &r
);
1664 free_memory_read_result_vector (void *x
)
1666 VEC(memory_read_result_s
) *v
= x
;
1667 memory_read_result_s
*current
;
1670 for (ix
= 0; VEC_iterate (memory_read_result_s
, v
, ix
, current
); ++ix
)
1672 xfree (current
->data
);
1674 VEC_free (memory_read_result_s
, v
);
1677 VEC(memory_read_result_s
) *
1678 read_memory_robust (struct target_ops
*ops
, ULONGEST offset
, LONGEST len
)
1680 VEC(memory_read_result_s
) *result
= 0;
1683 while (xfered
< len
)
1685 struct mem_region
*region
= lookup_mem_region (offset
+ xfered
);
1688 /* If there is no explicit region, a fake one should be created. */
1689 gdb_assert (region
);
1691 if (region
->hi
== 0)
1692 rlen
= len
- xfered
;
1694 rlen
= region
->hi
- offset
;
1696 if (region
->attrib
.mode
== MEM_NONE
|| region
->attrib
.mode
== MEM_WO
)
1698 /* Cannot read this region. Note that we can end up here only
1699 if the region is explicitly marked inaccessible, or
1700 'inaccessible-by-default' is in effect. */
1705 LONGEST to_read
= min (len
- xfered
, rlen
);
1706 gdb_byte
*buffer
= (gdb_byte
*)xmalloc (to_read
);
1708 LONGEST xfer
= target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1709 (gdb_byte
*) buffer
,
1710 offset
+ xfered
, to_read
);
1711 /* Call an observer, notifying them of the xfer progress? */
1714 /* Got an error reading full chunk. See if maybe we can read
1717 read_whatever_is_readable (ops
, offset
+ xfered
,
1718 offset
+ xfered
+ to_read
, &result
);
1723 struct memory_read_result r
;
1725 r
.begin
= offset
+ xfered
;
1726 r
.end
= r
.begin
+ xfer
;
1727 VEC_safe_push (memory_read_result_s
, result
, &r
);
1737 /* An alternative to target_write with progress callbacks. */
1740 target_write_with_progress (struct target_ops
*ops
,
1741 enum target_object object
,
1742 const char *annex
, const gdb_byte
*buf
,
1743 ULONGEST offset
, LONGEST len
,
1744 void (*progress
) (ULONGEST
, void *), void *baton
)
1748 /* Give the progress callback a chance to set up. */
1750 (*progress
) (0, baton
);
1752 while (xfered
< len
)
1754 ULONGEST xfered_len
;
1755 enum target_xfer_status status
;
1757 status
= target_write_partial (ops
, object
, annex
,
1758 (gdb_byte
*) buf
+ xfered
,
1759 offset
+ xfered
, len
- xfered
,
1762 if (status
!= TARGET_XFER_OK
)
1763 return status
== TARGET_XFER_EOF
? xfered
: -1;
1766 (*progress
) (xfered_len
, baton
);
1768 xfered
+= xfered_len
;
1774 /* For docs on target_write see target.h. */
1777 target_write (struct target_ops
*ops
,
1778 enum target_object object
,
1779 const char *annex
, const gdb_byte
*buf
,
1780 ULONGEST offset
, LONGEST len
)
1782 return target_write_with_progress (ops
, object
, annex
, buf
, offset
, len
,
1786 /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return
1787 the size of the transferred data. PADDING additional bytes are
1788 available in *BUF_P. This is a helper function for
1789 target_read_alloc; see the declaration of that function for more
1793 target_read_alloc_1 (struct target_ops
*ops
, enum target_object object
,
1794 const char *annex
, gdb_byte
**buf_p
, int padding
)
1796 size_t buf_alloc
, buf_pos
;
1799 /* This function does not have a length parameter; it reads the
1800 entire OBJECT). Also, it doesn't support objects fetched partly
1801 from one target and partly from another (in a different stratum,
1802 e.g. a core file and an executable). Both reasons make it
1803 unsuitable for reading memory. */
1804 gdb_assert (object
!= TARGET_OBJECT_MEMORY
);
1806 /* Start by reading up to 4K at a time. The target will throttle
1807 this number down if necessary. */
1809 buf
= xmalloc (buf_alloc
);
1813 ULONGEST xfered_len
;
1814 enum target_xfer_status status
;
1816 status
= target_read_partial (ops
, object
, annex
, &buf
[buf_pos
],
1817 buf_pos
, buf_alloc
- buf_pos
- padding
,
1820 if (status
== TARGET_XFER_EOF
)
1822 /* Read all there was. */
1829 else if (status
!= TARGET_XFER_OK
)
1831 /* An error occurred. */
1833 return TARGET_XFER_E_IO
;
1836 buf_pos
+= xfered_len
;
1838 /* If the buffer is filling up, expand it. */
1839 if (buf_alloc
< buf_pos
* 2)
1842 buf
= xrealloc (buf
, buf_alloc
);
1849 /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return
1850 the size of the transferred data. See the declaration in "target.h"
1851 function for more information about the return value. */
1854 target_read_alloc (struct target_ops
*ops
, enum target_object object
,
1855 const char *annex
, gdb_byte
**buf_p
)
1857 return target_read_alloc_1 (ops
, object
, annex
, buf_p
, 0);
1860 /* Read OBJECT/ANNEX using OPS. The result is NUL-terminated and
1861 returned as a string, allocated using xmalloc. If an error occurs
1862 or the transfer is unsupported, NULL is returned. Empty objects
1863 are returned as allocated but empty strings. A warning is issued
1864 if the result contains any embedded NUL bytes. */
1867 target_read_stralloc (struct target_ops
*ops
, enum target_object object
,
1872 LONGEST i
, transferred
;
1874 transferred
= target_read_alloc_1 (ops
, object
, annex
, &buffer
, 1);
1875 bufstr
= (char *) buffer
;
1877 if (transferred
< 0)
1880 if (transferred
== 0)
1881 return xstrdup ("");
1883 bufstr
[transferred
] = 0;
1885 /* Check for embedded NUL bytes; but allow trailing NULs. */
1886 for (i
= strlen (bufstr
); i
< transferred
; i
++)
1889 warning (_("target object %d, annex %s, "
1890 "contained unexpected null characters"),
1891 (int) object
, annex
? annex
: "(none)");
1898 /* Memory transfer methods. */
1901 get_target_memory (struct target_ops
*ops
, CORE_ADDR addr
, gdb_byte
*buf
,
1904 /* This method is used to read from an alternate, non-current
1905 target. This read must bypass the overlay support (as symbols
1906 don't match this target), and GDB's internal cache (wrong cache
1907 for this target). */
1908 if (target_read (ops
, TARGET_OBJECT_RAW_MEMORY
, NULL
, buf
, addr
, len
)
1910 memory_error (TARGET_XFER_E_IO
, addr
);
1914 get_target_memory_unsigned (struct target_ops
*ops
, CORE_ADDR addr
,
1915 int len
, enum bfd_endian byte_order
)
1917 gdb_byte buf
[sizeof (ULONGEST
)];
1919 gdb_assert (len
<= sizeof (buf
));
1920 get_target_memory (ops
, addr
, buf
, len
);
1921 return extract_unsigned_integer (buf
, len
, byte_order
);
1927 target_insert_breakpoint (struct gdbarch
*gdbarch
,
1928 struct bp_target_info
*bp_tgt
)
1930 if (!may_insert_breakpoints
)
1932 warning (_("May not insert breakpoints"));
1936 return current_target
.to_insert_breakpoint (¤t_target
,
1943 target_remove_breakpoint (struct gdbarch
*gdbarch
,
1944 struct bp_target_info
*bp_tgt
)
1946 /* This is kind of a weird case to handle, but the permission might
1947 have been changed after breakpoints were inserted - in which case
1948 we should just take the user literally and assume that any
1949 breakpoints should be left in place. */
1950 if (!may_insert_breakpoints
)
1952 warning (_("May not remove breakpoints"));
1956 return current_target
.to_remove_breakpoint (¤t_target
,
1961 target_info (char *args
, int from_tty
)
1963 struct target_ops
*t
;
1964 int has_all_mem
= 0;
1966 if (symfile_objfile
!= NULL
)
1967 printf_unfiltered (_("Symbols from \"%s\".\n"),
1968 objfile_name (symfile_objfile
));
1970 for (t
= target_stack
; t
!= NULL
; t
= t
->beneath
)
1972 if (!(*t
->to_has_memory
) (t
))
1975 if ((int) (t
->to_stratum
) <= (int) dummy_stratum
)
1978 printf_unfiltered (_("\tWhile running this, "
1979 "GDB does not access memory from...\n"));
1980 printf_unfiltered ("%s:\n", t
->to_longname
);
1981 (t
->to_files_info
) (t
);
1982 has_all_mem
= (*t
->to_has_all_memory
) (t
);
1986 /* This function is called before any new inferior is created, e.g.
1987 by running a program, attaching, or connecting to a target.
1988 It cleans up any state from previous invocations which might
1989 change between runs. This is a subset of what target_preopen
1990 resets (things which might change between targets). */
1993 target_pre_inferior (int from_tty
)
1995 /* Clear out solib state. Otherwise the solib state of the previous
1996 inferior might have survived and is entirely wrong for the new
1997 target. This has been observed on GNU/Linux using glibc 2.3. How
2009 Cannot access memory at address 0xdeadbeef
2012 /* In some OSs, the shared library list is the same/global/shared
2013 across inferiors. If code is shared between processes, so are
2014 memory regions and features. */
2015 if (!gdbarch_has_global_solist (target_gdbarch ()))
2017 no_shared_libraries (NULL
, from_tty
);
2019 invalidate_target_mem_regions ();
2021 target_clear_description ();
2024 agent_capability_invalidate ();
2027 /* Callback for iterate_over_inferiors. Gets rid of the given
2031 dispose_inferior (struct inferior
*inf
, void *args
)
2033 struct thread_info
*thread
;
2035 thread
= any_thread_of_process (inf
->pid
);
2038 switch_to_thread (thread
->ptid
);
2040 /* Core inferiors actually should be detached, not killed. */
2041 if (target_has_execution
)
2044 target_detach (NULL
, 0);
2050 /* This is to be called by the open routine before it does
2054 target_preopen (int from_tty
)
2058 if (have_inferiors ())
2061 || !have_live_inferiors ()
2062 || query (_("A program is being debugged already. Kill it? ")))
2063 iterate_over_inferiors (dispose_inferior
, NULL
);
2065 error (_("Program not killed."));
2068 /* Calling target_kill may remove the target from the stack. But if
2069 it doesn't (which seems like a win for UDI), remove it now. */
2070 /* Leave the exec target, though. The user may be switching from a
2071 live process to a core of the same program. */
2072 pop_all_targets_above (file_stratum
);
2074 target_pre_inferior (from_tty
);
2077 /* Detach a target after doing deferred register stores. */
2080 target_detach (const char *args
, int from_tty
)
2082 struct target_ops
* t
;
2084 if (gdbarch_has_global_breakpoints (target_gdbarch ()))
2085 /* Don't remove global breakpoints here. They're removed on
2086 disconnection from the target. */
2089 /* If we're in breakpoints-always-inserted mode, have to remove
2090 them before detaching. */
2091 remove_breakpoints_pid (ptid_get_pid (inferior_ptid
));
2093 prepare_for_detach ();
2095 current_target
.to_detach (¤t_target
, args
, from_tty
);
2099 target_disconnect (const char *args
, int from_tty
)
2101 /* If we're in breakpoints-always-inserted mode or if breakpoints
2102 are global across processes, we have to remove them before
2104 remove_breakpoints ();
2106 current_target
.to_disconnect (¤t_target
, args
, from_tty
);
2110 target_wait (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
2112 return (current_target
.to_wait
) (¤t_target
, ptid
, status
, options
);
2116 target_pid_to_str (ptid_t ptid
)
2118 return (*current_target
.to_pid_to_str
) (¤t_target
, ptid
);
2122 target_thread_name (struct thread_info
*info
)
2124 return current_target
.to_thread_name (¤t_target
, info
);
2128 target_resume (ptid_t ptid
, int step
, enum gdb_signal signal
)
2130 struct target_ops
*t
;
2132 target_dcache_invalidate ();
2134 current_target
.to_resume (¤t_target
, ptid
, step
, signal
);
2136 registers_changed_ptid (ptid
);
2137 /* We only set the internal executing state here. The user/frontend
2138 running state is set at a higher level. */
2139 set_executing (ptid
, 1);
2140 clear_inline_frame_state (ptid
);
2144 target_pass_signals (int numsigs
, unsigned char *pass_signals
)
2146 (*current_target
.to_pass_signals
) (¤t_target
, numsigs
, pass_signals
);
2150 target_program_signals (int numsigs
, unsigned char *program_signals
)
2152 (*current_target
.to_program_signals
) (¤t_target
,
2153 numsigs
, program_signals
);
2157 default_follow_fork (struct target_ops
*self
, int follow_child
,
2160 /* Some target returned a fork event, but did not know how to follow it. */
2161 internal_error (__FILE__
, __LINE__
,
2162 _("could not find a target to follow fork"));
2165 /* Look through the list of possible targets for a target that can
2169 target_follow_fork (int follow_child
, int detach_fork
)
2171 return current_target
.to_follow_fork (¤t_target
,
2172 follow_child
, detach_fork
);
2176 default_mourn_inferior (struct target_ops
*self
)
2178 internal_error (__FILE__
, __LINE__
,
2179 _("could not find a target to follow mourn inferior"));
2183 target_mourn_inferior (void)
2185 current_target
.to_mourn_inferior (¤t_target
);
2187 /* We no longer need to keep handles on any of the object files.
2188 Make sure to release them to avoid unnecessarily locking any
2189 of them while we're not actually debugging. */
2190 bfd_cache_close_all ();
2193 /* Look for a target which can describe architectural features, starting
2194 from TARGET. If we find one, return its description. */
2196 const struct target_desc
*
2197 target_read_description (struct target_ops
*target
)
2199 return target
->to_read_description (target
);
2202 /* This implements a basic search of memory, reading target memory and
2203 performing the search here (as opposed to performing the search in on the
2204 target side with, for example, gdbserver). */
2207 simple_search_memory (struct target_ops
*ops
,
2208 CORE_ADDR start_addr
, ULONGEST search_space_len
,
2209 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2210 CORE_ADDR
*found_addrp
)
2212 /* NOTE: also defined in find.c testcase. */
2213 #define SEARCH_CHUNK_SIZE 16000
2214 const unsigned chunk_size
= SEARCH_CHUNK_SIZE
;
2215 /* Buffer to hold memory contents for searching. */
2216 gdb_byte
*search_buf
;
2217 unsigned search_buf_size
;
2218 struct cleanup
*old_cleanups
;
2220 search_buf_size
= chunk_size
+ pattern_len
- 1;
2222 /* No point in trying to allocate a buffer larger than the search space. */
2223 if (search_space_len
< search_buf_size
)
2224 search_buf_size
= search_space_len
;
2226 search_buf
= malloc (search_buf_size
);
2227 if (search_buf
== NULL
)
2228 error (_("Unable to allocate memory to perform the search."));
2229 old_cleanups
= make_cleanup (free_current_contents
, &search_buf
);
2231 /* Prime the search buffer. */
2233 if (target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2234 search_buf
, start_addr
, search_buf_size
) != search_buf_size
)
2236 warning (_("Unable to access %s bytes of target "
2237 "memory at %s, halting search."),
2238 pulongest (search_buf_size
), hex_string (start_addr
));
2239 do_cleanups (old_cleanups
);
2243 /* Perform the search.
2245 The loop is kept simple by allocating [N + pattern-length - 1] bytes.
2246 When we've scanned N bytes we copy the trailing bytes to the start and
2247 read in another N bytes. */
2249 while (search_space_len
>= pattern_len
)
2251 gdb_byte
*found_ptr
;
2252 unsigned nr_search_bytes
= min (search_space_len
, search_buf_size
);
2254 found_ptr
= memmem (search_buf
, nr_search_bytes
,
2255 pattern
, pattern_len
);
2257 if (found_ptr
!= NULL
)
2259 CORE_ADDR found_addr
= start_addr
+ (found_ptr
- search_buf
);
2261 *found_addrp
= found_addr
;
2262 do_cleanups (old_cleanups
);
2266 /* Not found in this chunk, skip to next chunk. */
2268 /* Don't let search_space_len wrap here, it's unsigned. */
2269 if (search_space_len
>= chunk_size
)
2270 search_space_len
-= chunk_size
;
2272 search_space_len
= 0;
2274 if (search_space_len
>= pattern_len
)
2276 unsigned keep_len
= search_buf_size
- chunk_size
;
2277 CORE_ADDR read_addr
= start_addr
+ chunk_size
+ keep_len
;
2280 /* Copy the trailing part of the previous iteration to the front
2281 of the buffer for the next iteration. */
2282 gdb_assert (keep_len
== pattern_len
- 1);
2283 memcpy (search_buf
, search_buf
+ chunk_size
, keep_len
);
2285 nr_to_read
= min (search_space_len
- keep_len
, chunk_size
);
2287 if (target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2288 search_buf
+ keep_len
, read_addr
,
2289 nr_to_read
) != nr_to_read
)
2291 warning (_("Unable to access %s bytes of target "
2292 "memory at %s, halting search."),
2293 plongest (nr_to_read
),
2294 hex_string (read_addr
));
2295 do_cleanups (old_cleanups
);
2299 start_addr
+= chunk_size
;
2305 do_cleanups (old_cleanups
);
2309 /* Default implementation of memory-searching. */
2312 default_search_memory (struct target_ops
*self
,
2313 CORE_ADDR start_addr
, ULONGEST search_space_len
,
2314 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2315 CORE_ADDR
*found_addrp
)
2317 /* Start over from the top of the target stack. */
2318 return simple_search_memory (current_target
.beneath
,
2319 start_addr
, search_space_len
,
2320 pattern
, pattern_len
, found_addrp
);
2323 /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the
2324 sequence of bytes in PATTERN with length PATTERN_LEN.
2326 The result is 1 if found, 0 if not found, and -1 if there was an error
2327 requiring halting of the search (e.g. memory read error).
2328 If the pattern is found the address is recorded in FOUND_ADDRP. */
2331 target_search_memory (CORE_ADDR start_addr
, ULONGEST search_space_len
,
2332 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2333 CORE_ADDR
*found_addrp
)
2335 return current_target
.to_search_memory (¤t_target
, start_addr
,
2337 pattern
, pattern_len
, found_addrp
);
2340 /* Look through the currently pushed targets. If none of them will
2341 be able to restart the currently running process, issue an error
2345 target_require_runnable (void)
2347 struct target_ops
*t
;
2349 for (t
= target_stack
; t
!= NULL
; t
= t
->beneath
)
2351 /* If this target knows how to create a new program, then
2352 assume we will still be able to after killing the current
2353 one. Either killing and mourning will not pop T, or else
2354 find_default_run_target will find it again. */
2355 if (t
->to_create_inferior
!= NULL
)
2358 /* Do not worry about targets at certain strata that can not
2359 create inferiors. Assume they will be pushed again if
2360 necessary, and continue to the process_stratum. */
2361 if (t
->to_stratum
== thread_stratum
2362 || t
->to_stratum
== record_stratum
2363 || t
->to_stratum
== arch_stratum
)
2366 error (_("The \"%s\" target does not support \"run\". "
2367 "Try \"help target\" or \"continue\"."),
2371 /* This function is only called if the target is running. In that
2372 case there should have been a process_stratum target and it
2373 should either know how to create inferiors, or not... */
2374 internal_error (__FILE__
, __LINE__
, _("No targets found"));
2377 /* Whether GDB is allowed to fall back to the default run target for
2378 "run", "attach", etc. when no target is connected yet. */
2379 static int auto_connect_native_target
= 1;
2382 show_auto_connect_native_target (struct ui_file
*file
, int from_tty
,
2383 struct cmd_list_element
*c
, const char *value
)
2385 fprintf_filtered (file
,
2386 _("Whether GDB may automatically connect to the "
2387 "native target is %s.\n"),
2391 /* Look through the list of possible targets for a target that can
2392 execute a run or attach command without any other data. This is
2393 used to locate the default process stratum.
2395 If DO_MESG is not NULL, the result is always valid (error() is
2396 called for errors); else, return NULL on error. */
2398 static struct target_ops
*
2399 find_default_run_target (char *do_mesg
)
2401 struct target_ops
*runable
= NULL
;
2403 if (auto_connect_native_target
)
2405 struct target_ops
*t
;
2409 for (i
= 0; VEC_iterate (target_ops_p
, target_structs
, i
, t
); ++i
)
2411 if (t
->to_can_run
!= delegate_can_run
&& target_can_run (t
))
2422 if (runable
== NULL
)
2425 error (_("Don't know how to %s. Try \"help target\"."), do_mesg
);
2436 find_attach_target (void)
2438 struct target_ops
*t
;
2440 /* If a target on the current stack can attach, use it. */
2441 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2443 if (t
->to_attach
!= NULL
)
2447 /* Otherwise, use the default run target for attaching. */
2449 t
= find_default_run_target ("attach");
2457 find_run_target (void)
2459 struct target_ops
*t
;
2461 /* If a target on the current stack can attach, use it. */
2462 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2464 if (t
->to_create_inferior
!= NULL
)
2468 /* Otherwise, use the default run target. */
2470 t
= find_default_run_target ("run");
2475 /* Implement the "info proc" command. */
2478 target_info_proc (const char *args
, enum info_proc_what what
)
2480 struct target_ops
*t
;
2482 /* If we're already connected to something that can get us OS
2483 related data, use it. Otherwise, try using the native
2485 if (current_target
.to_stratum
>= process_stratum
)
2486 t
= current_target
.beneath
;
2488 t
= find_default_run_target (NULL
);
2490 for (; t
!= NULL
; t
= t
->beneath
)
2492 if (t
->to_info_proc
!= NULL
)
2494 t
->to_info_proc (t
, args
, what
);
2497 fprintf_unfiltered (gdb_stdlog
,
2498 "target_info_proc (\"%s\", %d)\n", args
, what
);
2508 find_default_supports_disable_randomization (struct target_ops
*self
)
2510 struct target_ops
*t
;
2512 t
= find_default_run_target (NULL
);
2513 if (t
&& t
->to_supports_disable_randomization
)
2514 return (t
->to_supports_disable_randomization
) (t
);
2519 target_supports_disable_randomization (void)
2521 struct target_ops
*t
;
2523 for (t
= ¤t_target
; t
!= NULL
; t
= t
->beneath
)
2524 if (t
->to_supports_disable_randomization
)
2525 return t
->to_supports_disable_randomization (t
);
2531 target_get_osdata (const char *type
)
2533 struct target_ops
*t
;
2535 /* If we're already connected to something that can get us OS
2536 related data, use it. Otherwise, try using the native
2538 if (current_target
.to_stratum
>= process_stratum
)
2539 t
= current_target
.beneath
;
2541 t
= find_default_run_target ("get OS data");
2546 return target_read_stralloc (t
, TARGET_OBJECT_OSDATA
, type
);
2549 static struct address_space
*
2550 default_thread_address_space (struct target_ops
*self
, ptid_t ptid
)
2552 struct inferior
*inf
;
2554 /* Fall-back to the "main" address space of the inferior. */
2555 inf
= find_inferior_pid (ptid_get_pid (ptid
));
2557 if (inf
== NULL
|| inf
->aspace
== NULL
)
2558 internal_error (__FILE__
, __LINE__
,
2559 _("Can't determine the current "
2560 "address space of thread %s\n"),
2561 target_pid_to_str (ptid
));
2566 /* Determine the current address space of thread PTID. */
2568 struct address_space
*
2569 target_thread_address_space (ptid_t ptid
)
2571 struct address_space
*aspace
;
2573 aspace
= current_target
.to_thread_address_space (¤t_target
, ptid
);
2574 gdb_assert (aspace
!= NULL
);
2580 /* Target file operations. */
2582 static struct target_ops
*
2583 default_fileio_target (void)
2585 /* If we're already connected to something that can perform
2586 file I/O, use it. Otherwise, try using the native target. */
2587 if (current_target
.to_stratum
>= process_stratum
)
2588 return current_target
.beneath
;
2590 return find_default_run_target ("file I/O");
2593 /* Open FILENAME on the target, using FLAGS and MODE. Return a
2594 target file descriptor, or -1 if an error occurs (and set
2597 target_fileio_open (const char *filename
, int flags
, int mode
,
2600 struct target_ops
*t
;
2602 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
2604 if (t
->to_fileio_open
!= NULL
)
2606 int fd
= t
->to_fileio_open (t
, filename
, flags
, mode
, target_errno
);
2609 fprintf_unfiltered (gdb_stdlog
,
2610 "target_fileio_open (%s,0x%x,0%o) = %d (%d)\n",
2611 filename
, flags
, mode
,
2612 fd
, fd
!= -1 ? 0 : *target_errno
);
2617 *target_errno
= FILEIO_ENOSYS
;
2621 /* Write up to LEN bytes from WRITE_BUF to FD on the target.
2622 Return the number of bytes written, or -1 if an error occurs
2623 (and set *TARGET_ERRNO). */
2625 target_fileio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
2626 ULONGEST offset
, int *target_errno
)
2628 struct target_ops
*t
;
2630 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
2632 if (t
->to_fileio_pwrite
!= NULL
)
2634 int ret
= t
->to_fileio_pwrite (t
, fd
, write_buf
, len
, offset
,
2638 fprintf_unfiltered (gdb_stdlog
,
2639 "target_fileio_pwrite (%d,...,%d,%s) "
2641 fd
, len
, pulongest (offset
),
2642 ret
, ret
!= -1 ? 0 : *target_errno
);
2647 *target_errno
= FILEIO_ENOSYS
;
2651 /* Read up to LEN bytes FD on the target into READ_BUF.
2652 Return the number of bytes read, or -1 if an error occurs
2653 (and set *TARGET_ERRNO). */
2655 target_fileio_pread (int fd
, gdb_byte
*read_buf
, int len
,
2656 ULONGEST offset
, int *target_errno
)
2658 struct target_ops
*t
;
2660 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
2662 if (t
->to_fileio_pread
!= NULL
)
2664 int ret
= t
->to_fileio_pread (t
, fd
, read_buf
, len
, offset
,
2668 fprintf_unfiltered (gdb_stdlog
,
2669 "target_fileio_pread (%d,...,%d,%s) "
2671 fd
, len
, pulongest (offset
),
2672 ret
, ret
!= -1 ? 0 : *target_errno
);
2677 *target_errno
= FILEIO_ENOSYS
;
2681 /* Close FD on the target. Return 0, or -1 if an error occurs
2682 (and set *TARGET_ERRNO). */
2684 target_fileio_close (int fd
, int *target_errno
)
2686 struct target_ops
*t
;
2688 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
2690 if (t
->to_fileio_close
!= NULL
)
2692 int ret
= t
->to_fileio_close (t
, fd
, target_errno
);
2695 fprintf_unfiltered (gdb_stdlog
,
2696 "target_fileio_close (%d) = %d (%d)\n",
2697 fd
, ret
, ret
!= -1 ? 0 : *target_errno
);
2702 *target_errno
= FILEIO_ENOSYS
;
2706 /* Unlink FILENAME on the target. Return 0, or -1 if an error
2707 occurs (and set *TARGET_ERRNO). */
2709 target_fileio_unlink (const char *filename
, int *target_errno
)
2711 struct target_ops
*t
;
2713 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
2715 if (t
->to_fileio_unlink
!= NULL
)
2717 int ret
= t
->to_fileio_unlink (t
, filename
, target_errno
);
2720 fprintf_unfiltered (gdb_stdlog
,
2721 "target_fileio_unlink (%s) = %d (%d)\n",
2722 filename
, ret
, ret
!= -1 ? 0 : *target_errno
);
2727 *target_errno
= FILEIO_ENOSYS
;
2731 /* Read value of symbolic link FILENAME on the target. Return a
2732 null-terminated string allocated via xmalloc, or NULL if an error
2733 occurs (and set *TARGET_ERRNO). */
2735 target_fileio_readlink (const char *filename
, int *target_errno
)
2737 struct target_ops
*t
;
2739 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
2741 if (t
->to_fileio_readlink
!= NULL
)
2743 char *ret
= t
->to_fileio_readlink (t
, filename
, target_errno
);
2746 fprintf_unfiltered (gdb_stdlog
,
2747 "target_fileio_readlink (%s) = %s (%d)\n",
2748 filename
, ret
? ret
: "(nil)",
2749 ret
? 0 : *target_errno
);
2754 *target_errno
= FILEIO_ENOSYS
;
2759 target_fileio_close_cleanup (void *opaque
)
2761 int fd
= *(int *) opaque
;
2764 target_fileio_close (fd
, &target_errno
);
2767 /* Read target file FILENAME. Store the result in *BUF_P and
2768 return the size of the transferred data. PADDING additional bytes are
2769 available in *BUF_P. This is a helper function for
2770 target_fileio_read_alloc; see the declaration of that function for more
2774 target_fileio_read_alloc_1 (const char *filename
,
2775 gdb_byte
**buf_p
, int padding
)
2777 struct cleanup
*close_cleanup
;
2778 size_t buf_alloc
, buf_pos
;
2784 fd
= target_fileio_open (filename
, FILEIO_O_RDONLY
, 0700, &target_errno
);
2788 close_cleanup
= make_cleanup (target_fileio_close_cleanup
, &fd
);
2790 /* Start by reading up to 4K at a time. The target will throttle
2791 this number down if necessary. */
2793 buf
= xmalloc (buf_alloc
);
2797 n
= target_fileio_pread (fd
, &buf
[buf_pos
],
2798 buf_alloc
- buf_pos
- padding
, buf_pos
,
2802 /* An error occurred. */
2803 do_cleanups (close_cleanup
);
2809 /* Read all there was. */
2810 do_cleanups (close_cleanup
);
2820 /* If the buffer is filling up, expand it. */
2821 if (buf_alloc
< buf_pos
* 2)
2824 buf
= xrealloc (buf
, buf_alloc
);
2831 /* Read target file FILENAME. Store the result in *BUF_P and return
2832 the size of the transferred data. See the declaration in "target.h"
2833 function for more information about the return value. */
2836 target_fileio_read_alloc (const char *filename
, gdb_byte
**buf_p
)
2838 return target_fileio_read_alloc_1 (filename
, buf_p
, 0);
2841 /* Read target file FILENAME. The result is NUL-terminated and
2842 returned as a string, allocated using xmalloc. If an error occurs
2843 or the transfer is unsupported, NULL is returned. Empty objects
2844 are returned as allocated but empty strings. A warning is issued
2845 if the result contains any embedded NUL bytes. */
2848 target_fileio_read_stralloc (const char *filename
)
2852 LONGEST i
, transferred
;
2854 transferred
= target_fileio_read_alloc_1 (filename
, &buffer
, 1);
2855 bufstr
= (char *) buffer
;
2857 if (transferred
< 0)
2860 if (transferred
== 0)
2861 return xstrdup ("");
2863 bufstr
[transferred
] = 0;
2865 /* Check for embedded NUL bytes; but allow trailing NULs. */
2866 for (i
= strlen (bufstr
); i
< transferred
; i
++)
2869 warning (_("target file %s "
2870 "contained unexpected null characters"),
2880 default_region_ok_for_hw_watchpoint (struct target_ops
*self
,
2881 CORE_ADDR addr
, int len
)
2883 return (len
<= gdbarch_ptr_bit (target_gdbarch ()) / TARGET_CHAR_BIT
);
2887 default_watchpoint_addr_within_range (struct target_ops
*target
,
2889 CORE_ADDR start
, int length
)
2891 return addr
>= start
&& addr
< start
+ length
;
2894 static struct gdbarch
*
2895 default_thread_architecture (struct target_ops
*ops
, ptid_t ptid
)
2897 return target_gdbarch ();
2901 return_zero (struct target_ops
*ignore
)
2907 return_zero_has_execution (struct target_ops
*ignore
, ptid_t ignore2
)
2913 * Find the next target down the stack from the specified target.
2917 find_target_beneath (struct target_ops
*t
)
2925 find_target_at (enum strata stratum
)
2927 struct target_ops
*t
;
2929 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2930 if (t
->to_stratum
== stratum
)
2937 /* The inferior process has died. Long live the inferior! */
2940 generic_mourn_inferior (void)
2944 ptid
= inferior_ptid
;
2945 inferior_ptid
= null_ptid
;
2947 /* Mark breakpoints uninserted in case something tries to delete a
2948 breakpoint while we delete the inferior's threads (which would
2949 fail, since the inferior is long gone). */
2950 mark_breakpoints_out ();
2952 if (!ptid_equal (ptid
, null_ptid
))
2954 int pid
= ptid_get_pid (ptid
);
2955 exit_inferior (pid
);
2958 /* Note this wipes step-resume breakpoints, so needs to be done
2959 after exit_inferior, which ends up referencing the step-resume
2960 breakpoints through clear_thread_inferior_resources. */
2961 breakpoint_init_inferior (inf_exited
);
2963 registers_changed ();
2965 reopen_exec_file ();
2966 reinit_frame_cache ();
2968 if (deprecated_detach_hook
)
2969 deprecated_detach_hook ();
2972 /* Convert a normal process ID to a string. Returns the string in a
2976 normal_pid_to_str (ptid_t ptid
)
2978 static char buf
[32];
2980 xsnprintf (buf
, sizeof buf
, "process %d", ptid_get_pid (ptid
));
2985 default_pid_to_str (struct target_ops
*ops
, ptid_t ptid
)
2987 return normal_pid_to_str (ptid
);
2990 /* Error-catcher for target_find_memory_regions. */
2992 dummy_find_memory_regions (struct target_ops
*self
,
2993 find_memory_region_ftype ignore1
, void *ignore2
)
2995 error (_("Command not implemented for this target."));
2999 /* Error-catcher for target_make_corefile_notes. */
3001 dummy_make_corefile_notes (struct target_ops
*self
,
3002 bfd
*ignore1
, int *ignore2
)
3004 error (_("Command not implemented for this target."));
3008 /* Set up the handful of non-empty slots needed by the dummy target
3012 init_dummy_target (void)
3014 dummy_target
.to_shortname
= "None";
3015 dummy_target
.to_longname
= "None";
3016 dummy_target
.to_doc
= "";
3017 dummy_target
.to_supports_disable_randomization
3018 = find_default_supports_disable_randomization
;
3019 dummy_target
.to_stratum
= dummy_stratum
;
3020 dummy_target
.to_has_all_memory
= return_zero
;
3021 dummy_target
.to_has_memory
= return_zero
;
3022 dummy_target
.to_has_stack
= return_zero
;
3023 dummy_target
.to_has_registers
= return_zero
;
3024 dummy_target
.to_has_execution
= return_zero_has_execution
;
3025 dummy_target
.to_magic
= OPS_MAGIC
;
3027 install_dummy_methods (&dummy_target
);
3032 target_close (struct target_ops
*targ
)
3034 gdb_assert (!target_is_pushed (targ
));
3036 if (targ
->to_xclose
!= NULL
)
3037 targ
->to_xclose (targ
);
3038 else if (targ
->to_close
!= NULL
)
3039 targ
->to_close (targ
);
3042 fprintf_unfiltered (gdb_stdlog
, "target_close ()\n");
3046 target_thread_alive (ptid_t ptid
)
3048 return current_target
.to_thread_alive (¤t_target
, ptid
);
3052 target_find_new_threads (void)
3054 current_target
.to_find_new_threads (¤t_target
);
3058 target_stop (ptid_t ptid
)
3062 warning (_("May not interrupt or stop the target, ignoring attempt"));
3066 (*current_target
.to_stop
) (¤t_target
, ptid
);
3069 /* See target/target.h. */
3072 target_stop_and_wait (ptid_t ptid
)
3074 struct target_waitstatus status
;
3075 int was_non_stop
= non_stop
;
3080 memset (&status
, 0, sizeof (status
));
3081 target_wait (ptid
, &status
, 0);
3083 non_stop
= was_non_stop
;
3086 /* See target/target.h. */
3089 target_continue_no_signal (ptid_t ptid
)
3091 target_resume (ptid
, 0, GDB_SIGNAL_0
);
3094 /* Concatenate ELEM to LIST, a comma separate list, and return the
3095 result. The LIST incoming argument is released. */
3098 str_comma_list_concat_elem (char *list
, const char *elem
)
3101 return xstrdup (elem
);
3103 return reconcat (list
, list
, ", ", elem
, (char *) NULL
);
3106 /* Helper for target_options_to_string. If OPT is present in
3107 TARGET_OPTIONS, append the OPT_STR (string version of OPT) in RET.
3108 Returns the new resulting string. OPT is removed from
3112 do_option (int *target_options
, char *ret
,
3113 int opt
, char *opt_str
)
3115 if ((*target_options
& opt
) != 0)
3117 ret
= str_comma_list_concat_elem (ret
, opt_str
);
3118 *target_options
&= ~opt
;
3125 target_options_to_string (int target_options
)
3129 #define DO_TARG_OPTION(OPT) \
3130 ret = do_option (&target_options, ret, OPT, #OPT)
3132 DO_TARG_OPTION (TARGET_WNOHANG
);
3134 if (target_options
!= 0)
3135 ret
= str_comma_list_concat_elem (ret
, "unknown???");
3143 debug_print_register (const char * func
,
3144 struct regcache
*regcache
, int regno
)
3146 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
3148 fprintf_unfiltered (gdb_stdlog
, "%s ", func
);
3149 if (regno
>= 0 && regno
< gdbarch_num_regs (gdbarch
)
3150 && gdbarch_register_name (gdbarch
, regno
) != NULL
3151 && gdbarch_register_name (gdbarch
, regno
)[0] != '\0')
3152 fprintf_unfiltered (gdb_stdlog
, "(%s)",
3153 gdbarch_register_name (gdbarch
, regno
));
3155 fprintf_unfiltered (gdb_stdlog
, "(%d)", regno
);
3156 if (regno
>= 0 && regno
< gdbarch_num_regs (gdbarch
))
3158 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
3159 int i
, size
= register_size (gdbarch
, regno
);
3160 gdb_byte buf
[MAX_REGISTER_SIZE
];
3162 regcache_raw_collect (regcache
, regno
, buf
);
3163 fprintf_unfiltered (gdb_stdlog
, " = ");
3164 for (i
= 0; i
< size
; i
++)
3166 fprintf_unfiltered (gdb_stdlog
, "%02x", buf
[i
]);
3168 if (size
<= sizeof (LONGEST
))
3170 ULONGEST val
= extract_unsigned_integer (buf
, size
, byte_order
);
3172 fprintf_unfiltered (gdb_stdlog
, " %s %s",
3173 core_addr_to_string_nz (val
), plongest (val
));
3176 fprintf_unfiltered (gdb_stdlog
, "\n");
3180 target_fetch_registers (struct regcache
*regcache
, int regno
)
3182 current_target
.to_fetch_registers (¤t_target
, regcache
, regno
);
3184 debug_print_register ("target_fetch_registers", regcache
, regno
);
3188 target_store_registers (struct regcache
*regcache
, int regno
)
3190 struct target_ops
*t
;
3192 if (!may_write_registers
)
3193 error (_("Writing to registers is not allowed (regno %d)"), regno
);
3195 current_target
.to_store_registers (¤t_target
, regcache
, regno
);
3198 debug_print_register ("target_store_registers", regcache
, regno
);
3203 target_core_of_thread (ptid_t ptid
)
3205 return current_target
.to_core_of_thread (¤t_target
, ptid
);
3209 simple_verify_memory (struct target_ops
*ops
,
3210 const gdb_byte
*data
, CORE_ADDR lma
, ULONGEST size
)
3212 LONGEST total_xfered
= 0;
3214 while (total_xfered
< size
)
3216 ULONGEST xfered_len
;
3217 enum target_xfer_status status
;
3219 ULONGEST howmuch
= min (sizeof (buf
), size
- total_xfered
);
3221 status
= target_xfer_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
3222 buf
, NULL
, lma
+ total_xfered
, howmuch
,
3224 if (status
== TARGET_XFER_OK
3225 && memcmp (data
+ total_xfered
, buf
, xfered_len
) == 0)
3227 total_xfered
+= xfered_len
;
3236 /* Default implementation of memory verification. */
3239 default_verify_memory (struct target_ops
*self
,
3240 const gdb_byte
*data
, CORE_ADDR memaddr
, ULONGEST size
)
3242 /* Start over from the top of the target stack. */
3243 return simple_verify_memory (current_target
.beneath
,
3244 data
, memaddr
, size
);
3248 target_verify_memory (const gdb_byte
*data
, CORE_ADDR memaddr
, ULONGEST size
)
3250 return current_target
.to_verify_memory (¤t_target
,
3251 data
, memaddr
, size
);
3254 /* The documentation for this function is in its prototype declaration in
3258 target_insert_mask_watchpoint (CORE_ADDR addr
, CORE_ADDR mask
, int rw
)
3260 return current_target
.to_insert_mask_watchpoint (¤t_target
,
3264 /* The documentation for this function is in its prototype declaration in
3268 target_remove_mask_watchpoint (CORE_ADDR addr
, CORE_ADDR mask
, int rw
)
3270 return current_target
.to_remove_mask_watchpoint (¤t_target
,
3274 /* The documentation for this function is in its prototype declaration
3278 target_masked_watch_num_registers (CORE_ADDR addr
, CORE_ADDR mask
)
3280 return current_target
.to_masked_watch_num_registers (¤t_target
,
3284 /* The documentation for this function is in its prototype declaration
3288 target_ranged_break_num_registers (void)
3290 return current_target
.to_ranged_break_num_registers (¤t_target
);
3295 struct btrace_target_info
*
3296 target_enable_btrace (ptid_t ptid
)
3298 return current_target
.to_enable_btrace (¤t_target
, ptid
);
3304 target_disable_btrace (struct btrace_target_info
*btinfo
)
3306 current_target
.to_disable_btrace (¤t_target
, btinfo
);
3312 target_teardown_btrace (struct btrace_target_info
*btinfo
)
3314 current_target
.to_teardown_btrace (¤t_target
, btinfo
);
3320 target_read_btrace (VEC (btrace_block_s
) **btrace
,
3321 struct btrace_target_info
*btinfo
,
3322 enum btrace_read_type type
)
3324 return current_target
.to_read_btrace (¤t_target
, btrace
, btinfo
, type
);
3330 target_stop_recording (void)
3332 current_target
.to_stop_recording (¤t_target
);
3338 target_save_record (const char *filename
)
3340 current_target
.to_save_record (¤t_target
, filename
);
3346 target_supports_delete_record (void)
3348 struct target_ops
*t
;
3350 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3351 if (t
->to_delete_record
!= delegate_delete_record
3352 && t
->to_delete_record
!= tdefault_delete_record
)
3361 target_delete_record (void)
3363 current_target
.to_delete_record (¤t_target
);
3369 target_record_is_replaying (void)
3371 return current_target
.to_record_is_replaying (¤t_target
);
3377 target_goto_record_begin (void)
3379 current_target
.to_goto_record_begin (¤t_target
);
3385 target_goto_record_end (void)
3387 current_target
.to_goto_record_end (¤t_target
);
3393 target_goto_record (ULONGEST insn
)
3395 current_target
.to_goto_record (¤t_target
, insn
);
3401 target_insn_history (int size
, int flags
)
3403 current_target
.to_insn_history (¤t_target
, size
, flags
);
3409 target_insn_history_from (ULONGEST from
, int size
, int flags
)
3411 current_target
.to_insn_history_from (¤t_target
, from
, size
, flags
);
3417 target_insn_history_range (ULONGEST begin
, ULONGEST end
, int flags
)
3419 current_target
.to_insn_history_range (¤t_target
, begin
, end
, flags
);
3425 target_call_history (int size
, int flags
)
3427 current_target
.to_call_history (¤t_target
, size
, flags
);
3433 target_call_history_from (ULONGEST begin
, int size
, int flags
)
3435 current_target
.to_call_history_from (¤t_target
, begin
, size
, flags
);
3441 target_call_history_range (ULONGEST begin
, ULONGEST end
, int flags
)
3443 current_target
.to_call_history_range (¤t_target
, begin
, end
, flags
);
3448 const struct frame_unwind
*
3449 target_get_unwinder (void)
3451 return current_target
.to_get_unwinder (¤t_target
);
3456 const struct frame_unwind
*
3457 target_get_tailcall_unwinder (void)
3459 return current_target
.to_get_tailcall_unwinder (¤t_target
);
3462 /* Default implementation of to_decr_pc_after_break. */
3465 default_target_decr_pc_after_break (struct target_ops
*ops
,
3466 struct gdbarch
*gdbarch
)
3468 return gdbarch_decr_pc_after_break (gdbarch
);
3474 target_decr_pc_after_break (struct gdbarch
*gdbarch
)
3476 return current_target
.to_decr_pc_after_break (¤t_target
, gdbarch
);
3482 target_prepare_to_generate_core (void)
3484 current_target
.to_prepare_to_generate_core (¤t_target
);
3490 target_done_generating_core (void)
3492 current_target
.to_done_generating_core (¤t_target
);
3496 setup_target_debug (void)
3498 memcpy (&debug_target
, ¤t_target
, sizeof debug_target
);
3500 init_debug_target (¤t_target
);
3504 static char targ_desc
[] =
3505 "Names of targets and files being debugged.\nShows the entire \
3506 stack of targets currently in use (including the exec-file,\n\
3507 core-file, and process, if any), as well as the symbol file name.";
3510 default_rcmd (struct target_ops
*self
, const char *command
,
3511 struct ui_file
*output
)
3513 error (_("\"monitor\" command not supported by this target."));
3517 do_monitor_command (char *cmd
,
3520 target_rcmd (cmd
, gdb_stdtarg
);
3523 /* Print the name of each layers of our target stack. */
3526 maintenance_print_target_stack (char *cmd
, int from_tty
)
3528 struct target_ops
*t
;
3530 printf_filtered (_("The current target stack is:\n"));
3532 for (t
= target_stack
; t
!= NULL
; t
= t
->beneath
)
3534 printf_filtered (" - %s (%s)\n", t
->to_shortname
, t
->to_longname
);
3538 /* Controls if targets can report that they can/are async. This is
3539 just for maintainers to use when debugging gdb. */
3540 int target_async_permitted
= 1;
3542 /* The set command writes to this variable. If the inferior is
3543 executing, target_async_permitted is *not* updated. */
3544 static int target_async_permitted_1
= 1;
3547 maint_set_target_async_command (char *args
, int from_tty
,
3548 struct cmd_list_element
*c
)
3550 if (have_live_inferiors ())
3552 target_async_permitted_1
= target_async_permitted
;
3553 error (_("Cannot change this setting while the inferior is running."));
3556 target_async_permitted
= target_async_permitted_1
;
3560 maint_show_target_async_command (struct ui_file
*file
, int from_tty
,
3561 struct cmd_list_element
*c
,
3564 fprintf_filtered (file
,
3565 _("Controlling the inferior in "
3566 "asynchronous mode is %s.\n"), value
);
3569 /* Temporary copies of permission settings. */
3571 static int may_write_registers_1
= 1;
3572 static int may_write_memory_1
= 1;
3573 static int may_insert_breakpoints_1
= 1;
3574 static int may_insert_tracepoints_1
= 1;
3575 static int may_insert_fast_tracepoints_1
= 1;
3576 static int may_stop_1
= 1;
3578 /* Make the user-set values match the real values again. */
3581 update_target_permissions (void)
3583 may_write_registers_1
= may_write_registers
;
3584 may_write_memory_1
= may_write_memory
;
3585 may_insert_breakpoints_1
= may_insert_breakpoints
;
3586 may_insert_tracepoints_1
= may_insert_tracepoints
;
3587 may_insert_fast_tracepoints_1
= may_insert_fast_tracepoints
;
3588 may_stop_1
= may_stop
;
3591 /* The one function handles (most of) the permission flags in the same
3595 set_target_permissions (char *args
, int from_tty
,
3596 struct cmd_list_element
*c
)
3598 if (target_has_execution
)
3600 update_target_permissions ();
3601 error (_("Cannot change this setting while the inferior is running."));
3604 /* Make the real values match the user-changed values. */
3605 may_write_registers
= may_write_registers_1
;
3606 may_insert_breakpoints
= may_insert_breakpoints_1
;
3607 may_insert_tracepoints
= may_insert_tracepoints_1
;
3608 may_insert_fast_tracepoints
= may_insert_fast_tracepoints_1
;
3609 may_stop
= may_stop_1
;
3610 update_observer_mode ();
3613 /* Set memory write permission independently of observer mode. */
3616 set_write_memory_permission (char *args
, int from_tty
,
3617 struct cmd_list_element
*c
)
3619 /* Make the real values match the user-changed values. */
3620 may_write_memory
= may_write_memory_1
;
3621 update_observer_mode ();
3626 initialize_targets (void)
3628 init_dummy_target ();
3629 push_target (&dummy_target
);
3631 add_info ("target", target_info
, targ_desc
);
3632 add_info ("files", target_info
, targ_desc
);
3634 add_setshow_zuinteger_cmd ("target", class_maintenance
, &targetdebug
, _("\
3635 Set target debugging."), _("\
3636 Show target debugging."), _("\
3637 When non-zero, target debugging is enabled. Higher numbers are more\n\
3641 &setdebuglist
, &showdebuglist
);
3643 add_setshow_boolean_cmd ("trust-readonly-sections", class_support
,
3644 &trust_readonly
, _("\
3645 Set mode for reading from readonly sections."), _("\
3646 Show mode for reading from readonly sections."), _("\
3647 When this mode is on, memory reads from readonly sections (such as .text)\n\
3648 will be read from the object file instead of from the target. This will\n\
3649 result in significant performance improvement for remote targets."),
3651 show_trust_readonly
,
3652 &setlist
, &showlist
);
3654 add_com ("monitor", class_obscure
, do_monitor_command
,
3655 _("Send a command to the remote monitor (remote targets only)."));
3657 add_cmd ("target-stack", class_maintenance
, maintenance_print_target_stack
,
3658 _("Print the name of each layer of the internal target stack."),
3659 &maintenanceprintlist
);
3661 add_setshow_boolean_cmd ("target-async", no_class
,
3662 &target_async_permitted_1
, _("\
3663 Set whether gdb controls the inferior in asynchronous mode."), _("\
3664 Show whether gdb controls the inferior in asynchronous mode."), _("\
3665 Tells gdb whether to control the inferior in asynchronous mode."),
3666 maint_set_target_async_command
,
3667 maint_show_target_async_command
,
3668 &maintenance_set_cmdlist
,
3669 &maintenance_show_cmdlist
);
3671 add_setshow_boolean_cmd ("may-write-registers", class_support
,
3672 &may_write_registers_1
, _("\
3673 Set permission to write into registers."), _("\
3674 Show permission to write into registers."), _("\
3675 When this permission is on, GDB may write into the target's registers.\n\
3676 Otherwise, any sort of write attempt will result in an error."),
3677 set_target_permissions
, NULL
,
3678 &setlist
, &showlist
);
3680 add_setshow_boolean_cmd ("may-write-memory", class_support
,
3681 &may_write_memory_1
, _("\
3682 Set permission to write into target memory."), _("\
3683 Show permission to write into target memory."), _("\
3684 When this permission is on, GDB may write into the target's memory.\n\
3685 Otherwise, any sort of write attempt will result in an error."),
3686 set_write_memory_permission
, NULL
,
3687 &setlist
, &showlist
);
3689 add_setshow_boolean_cmd ("may-insert-breakpoints", class_support
,
3690 &may_insert_breakpoints_1
, _("\
3691 Set permission to insert breakpoints in the target."), _("\
3692 Show permission to insert breakpoints in the target."), _("\
3693 When this permission is on, GDB may insert breakpoints in the program.\n\
3694 Otherwise, any sort of insertion attempt will result in an error."),
3695 set_target_permissions
, NULL
,
3696 &setlist
, &showlist
);
3698 add_setshow_boolean_cmd ("may-insert-tracepoints", class_support
,
3699 &may_insert_tracepoints_1
, _("\
3700 Set permission to insert tracepoints in the target."), _("\
3701 Show permission to insert tracepoints in the target."), _("\
3702 When this permission is on, GDB may insert tracepoints in the program.\n\
3703 Otherwise, any sort of insertion attempt will result in an error."),
3704 set_target_permissions
, NULL
,
3705 &setlist
, &showlist
);
3707 add_setshow_boolean_cmd ("may-insert-fast-tracepoints", class_support
,
3708 &may_insert_fast_tracepoints_1
, _("\
3709 Set permission to insert fast tracepoints in the target."), _("\
3710 Show permission to insert fast tracepoints in the target."), _("\
3711 When this permission is on, GDB may insert fast tracepoints.\n\
3712 Otherwise, any sort of insertion attempt will result in an error."),
3713 set_target_permissions
, NULL
,
3714 &setlist
, &showlist
);
3716 add_setshow_boolean_cmd ("may-interrupt", class_support
,
3718 Set permission to interrupt or signal the target."), _("\
3719 Show permission to interrupt or signal the target."), _("\
3720 When this permission is on, GDB may interrupt/stop the target's execution.\n\
3721 Otherwise, any attempt to interrupt or stop will be ignored."),
3722 set_target_permissions
, NULL
,
3723 &setlist
, &showlist
);
3725 add_setshow_boolean_cmd ("auto-connect-native-target", class_support
,
3726 &auto_connect_native_target
, _("\
3727 Set whether GDB may automatically connect to the native target."), _("\
3728 Show whether GDB may automatically connect to the native target."), _("\
3729 When on, and GDB is not connected to a target yet, GDB\n\
3730 attempts \"run\" and other commands with the native target."),
3731 NULL
, show_auto_connect_native_target
,
3732 &setlist
, &showlist
);