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 "target-descriptions.h"
37 #include "gdbthread.h"
40 #include "inline-frame.h"
41 #include "tracepoint.h"
42 #include "gdb/fileio.h"
45 #include "target-debug.h"
47 static void target_info (char *, int);
49 static void generic_tls_error (void) ATTRIBUTE_NORETURN
;
51 static void default_terminal_info (struct target_ops
*, const char *, int);
53 static int default_watchpoint_addr_within_range (struct target_ops
*,
54 CORE_ADDR
, CORE_ADDR
, int);
56 static int default_region_ok_for_hw_watchpoint (struct target_ops
*,
59 static void default_rcmd (struct target_ops
*, const char *, struct ui_file
*);
61 static ptid_t
default_get_ada_task_ptid (struct target_ops
*self
,
64 static int default_follow_fork (struct target_ops
*self
, int follow_child
,
67 static void default_mourn_inferior (struct target_ops
*self
);
69 static int default_search_memory (struct target_ops
*ops
,
71 ULONGEST search_space_len
,
72 const gdb_byte
*pattern
,
74 CORE_ADDR
*found_addrp
);
76 static int default_verify_memory (struct target_ops
*self
,
78 CORE_ADDR memaddr
, ULONGEST size
);
80 static struct address_space
*default_thread_address_space
81 (struct target_ops
*self
, ptid_t ptid
);
83 static void tcomplain (void) ATTRIBUTE_NORETURN
;
85 static int return_zero (struct target_ops
*);
87 static int return_zero_has_execution (struct target_ops
*, ptid_t
);
89 static void target_command (char *, int);
91 static struct target_ops
*find_default_run_target (char *);
93 static struct gdbarch
*default_thread_architecture (struct target_ops
*ops
,
96 static int dummy_find_memory_regions (struct target_ops
*self
,
97 find_memory_region_ftype ignore1
,
100 static char *dummy_make_corefile_notes (struct target_ops
*self
,
101 bfd
*ignore1
, int *ignore2
);
103 static char *default_pid_to_str (struct target_ops
*ops
, ptid_t ptid
);
105 static enum exec_direction_kind default_execution_direction
106 (struct target_ops
*self
);
108 static CORE_ADDR
default_target_decr_pc_after_break (struct target_ops
*ops
,
109 struct gdbarch
*gdbarch
);
111 static struct target_ops debug_target
;
113 #include "target-delegates.c"
115 static void init_dummy_target (void);
117 static void update_current_target (void);
119 /* Vector of existing target structures. */
120 typedef struct target_ops
*target_ops_p
;
121 DEF_VEC_P (target_ops_p
);
122 static VEC (target_ops_p
) *target_structs
;
124 /* The initial current target, so that there is always a semi-valid
127 static struct target_ops dummy_target
;
129 /* Top of target stack. */
131 static struct target_ops
*target_stack
;
133 /* The target structure we are currently using to talk to a process
134 or file or whatever "inferior" we have. */
136 struct target_ops current_target
;
138 /* Command list for target. */
140 static struct cmd_list_element
*targetlist
= NULL
;
142 /* Nonzero if we should trust readonly sections from the
143 executable when reading memory. */
145 static int trust_readonly
= 0;
147 /* Nonzero if we should show true memory content including
148 memory breakpoint inserted by gdb. */
150 static int show_memory_breakpoints
= 0;
152 /* These globals control whether GDB attempts to perform these
153 operations; they are useful for targets that need to prevent
154 inadvertant disruption, such as in non-stop mode. */
156 int may_write_registers
= 1;
158 int may_write_memory
= 1;
160 int may_insert_breakpoints
= 1;
162 int may_insert_tracepoints
= 1;
164 int may_insert_fast_tracepoints
= 1;
168 /* Non-zero if we want to see trace of target level stuff. */
170 static unsigned int targetdebug
= 0;
173 set_targetdebug (char *args
, int from_tty
, struct cmd_list_element
*c
)
175 update_current_target ();
179 show_targetdebug (struct ui_file
*file
, int from_tty
,
180 struct cmd_list_element
*c
, const char *value
)
182 fprintf_filtered (file
, _("Target debugging is %s.\n"), value
);
185 static void setup_target_debug (void);
187 /* The user just typed 'target' without the name of a target. */
190 target_command (char *arg
, int from_tty
)
192 fputs_filtered ("Argument required (target name). Try `help target'\n",
196 /* Default target_has_* methods for process_stratum targets. */
199 default_child_has_all_memory (struct target_ops
*ops
)
201 /* If no inferior selected, then we can't read memory here. */
202 if (ptid_equal (inferior_ptid
, null_ptid
))
209 default_child_has_memory (struct target_ops
*ops
)
211 /* If no inferior selected, then we can't read memory here. */
212 if (ptid_equal (inferior_ptid
, null_ptid
))
219 default_child_has_stack (struct target_ops
*ops
)
221 /* If no inferior selected, there's no stack. */
222 if (ptid_equal (inferior_ptid
, null_ptid
))
229 default_child_has_registers (struct target_ops
*ops
)
231 /* Can't read registers from no inferior. */
232 if (ptid_equal (inferior_ptid
, null_ptid
))
239 default_child_has_execution (struct target_ops
*ops
, ptid_t the_ptid
)
241 /* If there's no thread selected, then we can't make it run through
243 if (ptid_equal (the_ptid
, null_ptid
))
251 target_has_all_memory_1 (void)
253 struct target_ops
*t
;
255 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
256 if (t
->to_has_all_memory (t
))
263 target_has_memory_1 (void)
265 struct target_ops
*t
;
267 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
268 if (t
->to_has_memory (t
))
275 target_has_stack_1 (void)
277 struct target_ops
*t
;
279 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
280 if (t
->to_has_stack (t
))
287 target_has_registers_1 (void)
289 struct target_ops
*t
;
291 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
292 if (t
->to_has_registers (t
))
299 target_has_execution_1 (ptid_t the_ptid
)
301 struct target_ops
*t
;
303 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
304 if (t
->to_has_execution (t
, the_ptid
))
311 target_has_execution_current (void)
313 return target_has_execution_1 (inferior_ptid
);
316 /* Complete initialization of T. This ensures that various fields in
317 T are set, if needed by the target implementation. */
320 complete_target_initialization (struct target_ops
*t
)
322 /* Provide default values for all "must have" methods. */
324 if (t
->to_has_all_memory
== NULL
)
325 t
->to_has_all_memory
= return_zero
;
327 if (t
->to_has_memory
== NULL
)
328 t
->to_has_memory
= return_zero
;
330 if (t
->to_has_stack
== NULL
)
331 t
->to_has_stack
= return_zero
;
333 if (t
->to_has_registers
== NULL
)
334 t
->to_has_registers
= return_zero
;
336 if (t
->to_has_execution
== NULL
)
337 t
->to_has_execution
= return_zero_has_execution
;
339 /* These methods can be called on an unpushed target and so require
340 a default implementation if the target might plausibly be the
341 default run target. */
342 gdb_assert (t
->to_can_run
== NULL
|| (t
->to_can_async_p
!= NULL
343 && t
->to_supports_non_stop
!= NULL
));
345 install_delegators (t
);
348 /* This is used to implement the various target commands. */
351 open_target (char *args
, int from_tty
, struct cmd_list_element
*command
)
353 struct target_ops
*ops
= get_cmd_context (command
);
356 fprintf_unfiltered (gdb_stdlog
, "-> %s->to_open (...)\n",
359 ops
->to_open (args
, from_tty
);
362 fprintf_unfiltered (gdb_stdlog
, "<- %s->to_open (%s, %d)\n",
363 ops
->to_shortname
, args
, from_tty
);
366 /* Add possible target architecture T to the list and add a new
367 command 'target T->to_shortname'. Set COMPLETER as the command's
368 completer if not NULL. */
371 add_target_with_completer (struct target_ops
*t
,
372 completer_ftype
*completer
)
374 struct cmd_list_element
*c
;
376 complete_target_initialization (t
);
378 VEC_safe_push (target_ops_p
, target_structs
, t
);
380 if (targetlist
== NULL
)
381 add_prefix_cmd ("target", class_run
, target_command
, _("\
382 Connect to a target machine or process.\n\
383 The first argument is the type or protocol of the target machine.\n\
384 Remaining arguments are interpreted by the target protocol. For more\n\
385 information on the arguments for a particular protocol, type\n\
386 `help target ' followed by the protocol name."),
387 &targetlist
, "target ", 0, &cmdlist
);
388 c
= add_cmd (t
->to_shortname
, no_class
, NULL
, t
->to_doc
, &targetlist
);
389 set_cmd_sfunc (c
, open_target
);
390 set_cmd_context (c
, t
);
391 if (completer
!= NULL
)
392 set_cmd_completer (c
, completer
);
395 /* Add a possible target architecture to the list. */
398 add_target (struct target_ops
*t
)
400 add_target_with_completer (t
, NULL
);
406 add_deprecated_target_alias (struct target_ops
*t
, char *alias
)
408 struct cmd_list_element
*c
;
411 /* If we use add_alias_cmd, here, we do not get the deprecated warning,
413 c
= add_cmd (alias
, no_class
, NULL
, t
->to_doc
, &targetlist
);
414 set_cmd_sfunc (c
, open_target
);
415 set_cmd_context (c
, t
);
416 alt
= xstrprintf ("target %s", t
->to_shortname
);
417 deprecate_cmd (c
, alt
);
425 current_target
.to_kill (¤t_target
);
429 target_load (const char *arg
, int from_tty
)
431 target_dcache_invalidate ();
432 (*current_target
.to_load
) (¤t_target
, arg
, from_tty
);
436 target_terminal_inferior (void)
438 /* A background resume (``run&'') should leave GDB in control of the
439 terminal. Use target_can_async_p, not target_is_async_p, since at
440 this point the target is not async yet. However, if sync_execution
441 is not set, we know it will become async prior to resume. */
442 if (target_can_async_p () && !sync_execution
)
445 /* If GDB is resuming the inferior in the foreground, install
446 inferior's terminal modes. */
447 (*current_target
.to_terminal_inferior
) (¤t_target
);
453 target_supports_terminal_ours (void)
455 struct target_ops
*t
;
457 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
459 if (t
->to_terminal_ours
!= delegate_terminal_ours
460 && t
->to_terminal_ours
!= tdefault_terminal_ours
)
470 error (_("You can't do that when your target is `%s'"),
471 current_target
.to_shortname
);
477 error (_("You can't do that without a process to debug."));
481 default_terminal_info (struct target_ops
*self
, const char *args
, int from_tty
)
483 printf_unfiltered (_("No saved terminal information.\n"));
486 /* A default implementation for the to_get_ada_task_ptid target method.
488 This function builds the PTID by using both LWP and TID as part of
489 the PTID lwp and tid elements. The pid used is the pid of the
493 default_get_ada_task_ptid (struct target_ops
*self
, long lwp
, long tid
)
495 return ptid_build (ptid_get_pid (inferior_ptid
), lwp
, tid
);
498 static enum exec_direction_kind
499 default_execution_direction (struct target_ops
*self
)
501 if (!target_can_execute_reverse
)
503 else if (!target_can_async_p ())
506 gdb_assert_not_reached ("\
507 to_execution_direction must be implemented for reverse async");
510 /* Go through the target stack from top to bottom, copying over zero
511 entries in current_target, then filling in still empty entries. In
512 effect, we are doing class inheritance through the pushed target
515 NOTE: cagney/2003-10-17: The problem with this inheritance, as it
516 is currently implemented, is that it discards any knowledge of
517 which target an inherited method originally belonged to.
518 Consequently, new new target methods should instead explicitly and
519 locally search the target stack for the target that can handle the
523 update_current_target (void)
525 struct target_ops
*t
;
527 /* First, reset current's contents. */
528 memset (¤t_target
, 0, sizeof (current_target
));
530 /* Install the delegators. */
531 install_delegators (¤t_target
);
533 current_target
.to_stratum
= target_stack
->to_stratum
;
535 #define INHERIT(FIELD, TARGET) \
536 if (!current_target.FIELD) \
537 current_target.FIELD = (TARGET)->FIELD
539 /* Do not add any new INHERITs here. Instead, use the delegation
540 mechanism provided by make-target-delegates. */
541 for (t
= target_stack
; t
; t
= t
->beneath
)
543 INHERIT (to_shortname
, t
);
544 INHERIT (to_longname
, t
);
545 INHERIT (to_attach_no_wait
, t
);
546 INHERIT (to_have_steppable_watchpoint
, t
);
547 INHERIT (to_have_continuable_watchpoint
, t
);
548 INHERIT (to_has_thread_control
, t
);
552 /* Finally, position the target-stack beneath the squashed
553 "current_target". That way code looking for a non-inherited
554 target method can quickly and simply find it. */
555 current_target
.beneath
= target_stack
;
558 setup_target_debug ();
561 /* Push a new target type into the stack of the existing target accessors,
562 possibly superseding some of the existing accessors.
564 Rather than allow an empty stack, we always have the dummy target at
565 the bottom stratum, so we can call the function vectors without
569 push_target (struct target_ops
*t
)
571 struct target_ops
**cur
;
573 /* Check magic number. If wrong, it probably means someone changed
574 the struct definition, but not all the places that initialize one. */
575 if (t
->to_magic
!= OPS_MAGIC
)
577 fprintf_unfiltered (gdb_stderr
,
578 "Magic number of %s target struct wrong\n",
580 internal_error (__FILE__
, __LINE__
,
581 _("failed internal consistency check"));
584 /* Find the proper stratum to install this target in. */
585 for (cur
= &target_stack
; (*cur
) != NULL
; cur
= &(*cur
)->beneath
)
587 if ((int) (t
->to_stratum
) >= (int) (*cur
)->to_stratum
)
591 /* If there's already targets at this stratum, remove them. */
592 /* FIXME: cagney/2003-10-15: I think this should be popping all
593 targets to CUR, and not just those at this stratum level. */
594 while ((*cur
) != NULL
&& t
->to_stratum
== (*cur
)->to_stratum
)
596 /* There's already something at this stratum level. Close it,
597 and un-hook it from the stack. */
598 struct target_ops
*tmp
= (*cur
);
600 (*cur
) = (*cur
)->beneath
;
605 /* We have removed all targets in our stratum, now add the new one. */
609 update_current_target ();
612 /* Remove a target_ops vector from the stack, wherever it may be.
613 Return how many times it was removed (0 or 1). */
616 unpush_target (struct target_ops
*t
)
618 struct target_ops
**cur
;
619 struct target_ops
*tmp
;
621 if (t
->to_stratum
== dummy_stratum
)
622 internal_error (__FILE__
, __LINE__
,
623 _("Attempt to unpush the dummy target"));
625 /* Look for the specified target. Note that we assume that a target
626 can only occur once in the target stack. */
628 for (cur
= &target_stack
; (*cur
) != NULL
; cur
= &(*cur
)->beneath
)
634 /* If we don't find target_ops, quit. Only open targets should be
639 /* Unchain the target. */
641 (*cur
) = (*cur
)->beneath
;
644 update_current_target ();
646 /* Finally close the target. Note we do this after unchaining, so
647 any target method calls from within the target_close
648 implementation don't end up in T anymore. */
655 pop_all_targets_above (enum strata above_stratum
)
657 while ((int) (current_target
.to_stratum
) > (int) above_stratum
)
659 if (!unpush_target (target_stack
))
661 fprintf_unfiltered (gdb_stderr
,
662 "pop_all_targets couldn't find target %s\n",
663 target_stack
->to_shortname
);
664 internal_error (__FILE__
, __LINE__
,
665 _("failed internal consistency check"));
672 pop_all_targets (void)
674 pop_all_targets_above (dummy_stratum
);
677 /* Return 1 if T is now pushed in the target stack. Return 0 otherwise. */
680 target_is_pushed (struct target_ops
*t
)
682 struct target_ops
*cur
;
684 /* Check magic number. If wrong, it probably means someone changed
685 the struct definition, but not all the places that initialize one. */
686 if (t
->to_magic
!= OPS_MAGIC
)
688 fprintf_unfiltered (gdb_stderr
,
689 "Magic number of %s target struct wrong\n",
691 internal_error (__FILE__
, __LINE__
,
692 _("failed internal consistency check"));
695 for (cur
= target_stack
; cur
!= NULL
; cur
= cur
->beneath
)
702 /* Default implementation of to_get_thread_local_address. */
705 generic_tls_error (void)
707 throw_error (TLS_GENERIC_ERROR
,
708 _("Cannot find thread-local variables on this target"));
711 /* Using the objfile specified in OBJFILE, find the address for the
712 current thread's thread-local storage with offset OFFSET. */
714 target_translate_tls_address (struct objfile
*objfile
, CORE_ADDR offset
)
716 volatile CORE_ADDR addr
= 0;
717 struct target_ops
*target
= ¤t_target
;
719 if (gdbarch_fetch_tls_load_module_address_p (target_gdbarch ()))
721 ptid_t ptid
= inferior_ptid
;
722 volatile struct gdb_exception ex
;
724 TRY_CATCH (ex
, RETURN_MASK_ALL
)
728 /* Fetch the load module address for this objfile. */
729 lm_addr
= gdbarch_fetch_tls_load_module_address (target_gdbarch (),
732 addr
= target
->to_get_thread_local_address (target
, ptid
,
735 /* If an error occurred, print TLS related messages here. Otherwise,
736 throw the error to some higher catcher. */
739 int objfile_is_library
= (objfile
->flags
& OBJF_SHARED
);
743 case TLS_NO_LIBRARY_SUPPORT_ERROR
:
744 error (_("Cannot find thread-local variables "
745 "in this thread library."));
747 case TLS_LOAD_MODULE_NOT_FOUND_ERROR
:
748 if (objfile_is_library
)
749 error (_("Cannot find shared library `%s' in dynamic"
750 " linker's load module list"), objfile_name (objfile
));
752 error (_("Cannot find executable file `%s' in dynamic"
753 " linker's load module list"), objfile_name (objfile
));
755 case TLS_NOT_ALLOCATED_YET_ERROR
:
756 if (objfile_is_library
)
757 error (_("The inferior has not yet allocated storage for"
758 " thread-local variables in\n"
759 "the shared library `%s'\n"
761 objfile_name (objfile
), target_pid_to_str (ptid
));
763 error (_("The inferior has not yet allocated storage for"
764 " thread-local variables in\n"
765 "the executable `%s'\n"
767 objfile_name (objfile
), target_pid_to_str (ptid
));
769 case TLS_GENERIC_ERROR
:
770 if (objfile_is_library
)
771 error (_("Cannot find thread-local storage for %s, "
772 "shared library %s:\n%s"),
773 target_pid_to_str (ptid
),
774 objfile_name (objfile
), ex
.message
);
776 error (_("Cannot find thread-local storage for %s, "
777 "executable file %s:\n%s"),
778 target_pid_to_str (ptid
),
779 objfile_name (objfile
), ex
.message
);
782 throw_exception (ex
);
787 /* It wouldn't be wrong here to try a gdbarch method, too; finding
788 TLS is an ABI-specific thing. But we don't do that yet. */
790 error (_("Cannot find thread-local variables on this target"));
796 target_xfer_status_to_string (enum target_xfer_status status
)
798 #define CASE(X) case X: return #X
801 CASE(TARGET_XFER_E_IO
);
802 CASE(TARGET_XFER_UNAVAILABLE
);
811 #define MIN(A, B) (((A) <= (B)) ? (A) : (B))
813 /* target_read_string -- read a null terminated string, up to LEN bytes,
814 from MEMADDR in target. Set *ERRNOP to the errno code, or 0 if successful.
815 Set *STRING to a pointer to malloc'd memory containing the data; the caller
816 is responsible for freeing it. Return the number of bytes successfully
820 target_read_string (CORE_ADDR memaddr
, char **string
, int len
, int *errnop
)
826 int buffer_allocated
;
828 unsigned int nbytes_read
= 0;
832 /* Small for testing. */
833 buffer_allocated
= 4;
834 buffer
= xmalloc (buffer_allocated
);
839 tlen
= MIN (len
, 4 - (memaddr
& 3));
840 offset
= memaddr
& 3;
842 errcode
= target_read_memory (memaddr
& ~3, buf
, sizeof buf
);
845 /* The transfer request might have crossed the boundary to an
846 unallocated region of memory. Retry the transfer, requesting
850 errcode
= target_read_memory (memaddr
, buf
, 1);
855 if (bufptr
- buffer
+ tlen
> buffer_allocated
)
859 bytes
= bufptr
- buffer
;
860 buffer_allocated
*= 2;
861 buffer
= xrealloc (buffer
, buffer_allocated
);
862 bufptr
= buffer
+ bytes
;
865 for (i
= 0; i
< tlen
; i
++)
867 *bufptr
++ = buf
[i
+ offset
];
868 if (buf
[i
+ offset
] == '\000')
870 nbytes_read
+= i
+ 1;
886 struct target_section_table
*
887 target_get_section_table (struct target_ops
*target
)
889 return (*target
->to_get_section_table
) (target
);
892 /* Find a section containing ADDR. */
894 struct target_section
*
895 target_section_by_addr (struct target_ops
*target
, CORE_ADDR addr
)
897 struct target_section_table
*table
= target_get_section_table (target
);
898 struct target_section
*secp
;
903 for (secp
= table
->sections
; secp
< table
->sections_end
; secp
++)
905 if (addr
>= secp
->addr
&& addr
< secp
->endaddr
)
912 /* Helper for the memory xfer routines. Checks the attributes of the
913 memory region of MEMADDR against the read or write being attempted.
914 If the access is permitted returns true, otherwise returns false.
915 REGION_P is an optional output parameter. If not-NULL, it is
916 filled with a pointer to the memory region of MEMADDR. REG_LEN
917 returns LEN trimmed to the end of the region. This is how much the
918 caller can continue requesting, if the access is permitted. A
919 single xfer request must not straddle memory region boundaries. */
922 memory_xfer_check_region (gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
923 ULONGEST memaddr
, ULONGEST len
, ULONGEST
*reg_len
,
924 struct mem_region
**region_p
)
926 struct mem_region
*region
;
928 region
= lookup_mem_region (memaddr
);
930 if (region_p
!= NULL
)
933 switch (region
->attrib
.mode
)
936 if (writebuf
!= NULL
)
946 /* We only support writing to flash during "load" for now. */
947 if (writebuf
!= NULL
)
948 error (_("Writing to flash memory forbidden in this context"));
955 /* region->hi == 0 means there's no upper bound. */
956 if (memaddr
+ len
< region
->hi
|| region
->hi
== 0)
959 *reg_len
= region
->hi
- memaddr
;
964 /* Read memory from more than one valid target. A core file, for
965 instance, could have some of memory but delegate other bits to
966 the target below it. So, we must manually try all targets. */
968 static enum target_xfer_status
969 raw_memory_xfer_partial (struct target_ops
*ops
, gdb_byte
*readbuf
,
970 const gdb_byte
*writebuf
, ULONGEST memaddr
, LONGEST len
,
971 ULONGEST
*xfered_len
)
973 enum target_xfer_status res
;
977 res
= ops
->to_xfer_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
978 readbuf
, writebuf
, memaddr
, len
,
980 if (res
== TARGET_XFER_OK
)
983 /* Stop if the target reports that the memory is not available. */
984 if (res
== TARGET_XFER_UNAVAILABLE
)
987 /* We want to continue past core files to executables, but not
988 past a running target's memory. */
989 if (ops
->to_has_all_memory (ops
))
996 /* The cache works at the raw memory level. Make sure the cache
997 gets updated with raw contents no matter what kind of memory
998 object was originally being written. Note we do write-through
999 first, so that if it fails, we don't write to the cache contents
1000 that never made it to the target. */
1001 if (writebuf
!= NULL
1002 && !ptid_equal (inferior_ptid
, null_ptid
)
1003 && target_dcache_init_p ()
1004 && (stack_cache_enabled_p () || code_cache_enabled_p ()))
1006 DCACHE
*dcache
= target_dcache_get ();
1008 /* Note that writing to an area of memory which wasn't present
1009 in the cache doesn't cause it to be loaded in. */
1010 dcache_update (dcache
, res
, memaddr
, writebuf
, *xfered_len
);
1016 /* Perform a partial memory transfer.
1017 For docs see target.h, to_xfer_partial. */
1019 static enum target_xfer_status
1020 memory_xfer_partial_1 (struct target_ops
*ops
, enum target_object object
,
1021 gdb_byte
*readbuf
, const gdb_byte
*writebuf
, ULONGEST memaddr
,
1022 ULONGEST len
, ULONGEST
*xfered_len
)
1024 enum target_xfer_status res
;
1026 struct mem_region
*region
;
1027 struct inferior
*inf
;
1029 /* For accesses to unmapped overlay sections, read directly from
1030 files. Must do this first, as MEMADDR may need adjustment. */
1031 if (readbuf
!= NULL
&& overlay_debugging
)
1033 struct obj_section
*section
= find_pc_overlay (memaddr
);
1035 if (pc_in_unmapped_range (memaddr
, section
))
1037 struct target_section_table
*table
1038 = target_get_section_table (ops
);
1039 const char *section_name
= section
->the_bfd_section
->name
;
1041 memaddr
= overlay_mapped_address (memaddr
, section
);
1042 return section_table_xfer_memory_partial (readbuf
, writebuf
,
1043 memaddr
, len
, xfered_len
,
1045 table
->sections_end
,
1050 /* Try the executable files, if "trust-readonly-sections" is set. */
1051 if (readbuf
!= NULL
&& trust_readonly
)
1053 struct target_section
*secp
;
1054 struct target_section_table
*table
;
1056 secp
= target_section_by_addr (ops
, memaddr
);
1058 && (bfd_get_section_flags (secp
->the_bfd_section
->owner
,
1059 secp
->the_bfd_section
)
1062 table
= target_get_section_table (ops
);
1063 return section_table_xfer_memory_partial (readbuf
, writebuf
,
1064 memaddr
, len
, xfered_len
,
1066 table
->sections_end
,
1071 /* Try GDB's internal data cache. */
1073 if (!memory_xfer_check_region (readbuf
, writebuf
, memaddr
, len
, ®_len
,
1075 return TARGET_XFER_E_IO
;
1077 if (!ptid_equal (inferior_ptid
, null_ptid
))
1078 inf
= find_inferior_pid (ptid_get_pid (inferior_ptid
));
1084 /* The dcache reads whole cache lines; that doesn't play well
1085 with reading from a trace buffer, because reading outside of
1086 the collected memory range fails. */
1087 && get_traceframe_number () == -1
1088 && (region
->attrib
.cache
1089 || (stack_cache_enabled_p () && object
== TARGET_OBJECT_STACK_MEMORY
)
1090 || (code_cache_enabled_p () && object
== TARGET_OBJECT_CODE_MEMORY
)))
1092 DCACHE
*dcache
= target_dcache_get_or_init ();
1094 return dcache_read_memory_partial (ops
, dcache
, memaddr
, readbuf
,
1095 reg_len
, xfered_len
);
1098 /* If none of those methods found the memory we wanted, fall back
1099 to a target partial transfer. Normally a single call to
1100 to_xfer_partial is enough; if it doesn't recognize an object
1101 it will call the to_xfer_partial of the next target down.
1102 But for memory this won't do. Memory is the only target
1103 object which can be read from more than one valid target.
1104 A core file, for instance, could have some of memory but
1105 delegate other bits to the target below it. So, we must
1106 manually try all targets. */
1108 res
= raw_memory_xfer_partial (ops
, readbuf
, writebuf
, memaddr
, reg_len
,
1111 /* If we still haven't got anything, return the last error. We
1116 /* Perform a partial memory transfer. For docs see target.h,
1119 static enum target_xfer_status
1120 memory_xfer_partial (struct target_ops
*ops
, enum target_object object
,
1121 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1122 ULONGEST memaddr
, ULONGEST len
, ULONGEST
*xfered_len
)
1124 enum target_xfer_status res
;
1126 /* Zero length requests are ok and require no work. */
1128 return TARGET_XFER_EOF
;
1130 /* Fill in READBUF with breakpoint shadows, or WRITEBUF with
1131 breakpoint insns, thus hiding out from higher layers whether
1132 there are software breakpoints inserted in the code stream. */
1133 if (readbuf
!= NULL
)
1135 res
= memory_xfer_partial_1 (ops
, object
, readbuf
, NULL
, memaddr
, len
,
1138 if (res
== TARGET_XFER_OK
&& !show_memory_breakpoints
)
1139 breakpoint_xfer_memory (readbuf
, NULL
, NULL
, memaddr
, *xfered_len
);
1144 struct cleanup
*old_chain
;
1146 /* A large write request is likely to be partially satisfied
1147 by memory_xfer_partial_1. We will continually malloc
1148 and free a copy of the entire write request for breakpoint
1149 shadow handling even though we only end up writing a small
1150 subset of it. Cap writes to 4KB to mitigate this. */
1151 len
= min (4096, len
);
1153 buf
= xmalloc (len
);
1154 old_chain
= make_cleanup (xfree
, buf
);
1155 memcpy (buf
, writebuf
, len
);
1157 breakpoint_xfer_memory (NULL
, buf
, writebuf
, memaddr
, len
);
1158 res
= memory_xfer_partial_1 (ops
, object
, NULL
, buf
, memaddr
, len
,
1161 do_cleanups (old_chain
);
1168 restore_show_memory_breakpoints (void *arg
)
1170 show_memory_breakpoints
= (uintptr_t) arg
;
1174 make_show_memory_breakpoints_cleanup (int show
)
1176 int current
= show_memory_breakpoints
;
1178 show_memory_breakpoints
= show
;
1179 return make_cleanup (restore_show_memory_breakpoints
,
1180 (void *) (uintptr_t) current
);
1183 /* For docs see target.h, to_xfer_partial. */
1185 enum target_xfer_status
1186 target_xfer_partial (struct target_ops
*ops
,
1187 enum target_object object
, const char *annex
,
1188 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1189 ULONGEST offset
, ULONGEST len
,
1190 ULONGEST
*xfered_len
)
1192 enum target_xfer_status retval
;
1194 gdb_assert (ops
->to_xfer_partial
!= NULL
);
1196 /* Transfer is done when LEN is zero. */
1198 return TARGET_XFER_EOF
;
1200 if (writebuf
&& !may_write_memory
)
1201 error (_("Writing to memory is not allowed (addr %s, len %s)"),
1202 core_addr_to_string_nz (offset
), plongest (len
));
1206 /* If this is a memory transfer, let the memory-specific code
1207 have a look at it instead. Memory transfers are more
1209 if (object
== TARGET_OBJECT_MEMORY
|| object
== TARGET_OBJECT_STACK_MEMORY
1210 || object
== TARGET_OBJECT_CODE_MEMORY
)
1211 retval
= memory_xfer_partial (ops
, object
, readbuf
,
1212 writebuf
, offset
, len
, xfered_len
);
1213 else if (object
== TARGET_OBJECT_RAW_MEMORY
)
1215 /* Skip/avoid accessing the target if the memory region
1216 attributes block the access. Check this here instead of in
1217 raw_memory_xfer_partial as otherwise we'd end up checking
1218 this twice in the case of the memory_xfer_partial path is
1219 taken; once before checking the dcache, and another in the
1220 tail call to raw_memory_xfer_partial. */
1221 if (!memory_xfer_check_region (readbuf
, writebuf
, offset
, len
, &len
,
1223 return TARGET_XFER_E_IO
;
1225 /* Request the normal memory object from other layers. */
1226 retval
= raw_memory_xfer_partial (ops
, readbuf
, writebuf
, offset
, len
,
1230 retval
= ops
->to_xfer_partial (ops
, object
, annex
, readbuf
,
1231 writebuf
, offset
, len
, xfered_len
);
1235 const unsigned char *myaddr
= NULL
;
1237 fprintf_unfiltered (gdb_stdlog
,
1238 "%s:target_xfer_partial "
1239 "(%d, %s, %s, %s, %s, %s) = %d, %s",
1242 (annex
? annex
: "(null)"),
1243 host_address_to_string (readbuf
),
1244 host_address_to_string (writebuf
),
1245 core_addr_to_string_nz (offset
),
1246 pulongest (len
), retval
,
1247 pulongest (*xfered_len
));
1253 if (retval
== TARGET_XFER_OK
&& myaddr
!= NULL
)
1257 fputs_unfiltered (", bytes =", gdb_stdlog
);
1258 for (i
= 0; i
< *xfered_len
; i
++)
1260 if ((((intptr_t) &(myaddr
[i
])) & 0xf) == 0)
1262 if (targetdebug
< 2 && i
> 0)
1264 fprintf_unfiltered (gdb_stdlog
, " ...");
1267 fprintf_unfiltered (gdb_stdlog
, "\n");
1270 fprintf_unfiltered (gdb_stdlog
, " %02x", myaddr
[i
] & 0xff);
1274 fputc_unfiltered ('\n', gdb_stdlog
);
1277 /* Check implementations of to_xfer_partial update *XFERED_LEN
1278 properly. Do assertion after printing debug messages, so that we
1279 can find more clues on assertion failure from debugging messages. */
1280 if (retval
== TARGET_XFER_OK
|| retval
== TARGET_XFER_UNAVAILABLE
)
1281 gdb_assert (*xfered_len
> 0);
1286 /* Read LEN bytes of target memory at address MEMADDR, placing the
1287 results in GDB's memory at MYADDR. Returns either 0 for success or
1288 TARGET_XFER_E_IO if any error occurs.
1290 If an error occurs, no guarantee is made about the contents of the data at
1291 MYADDR. In particular, the caller should not depend upon partial reads
1292 filling the buffer with good data. There is no way for the caller to know
1293 how much good data might have been transfered anyway. Callers that can
1294 deal with partial reads should call target_read (which will retry until
1295 it makes no progress, and then return how much was transferred). */
1298 target_read_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1300 /* Dispatch to the topmost target, not the flattened current_target.
1301 Memory accesses check target->to_has_(all_)memory, and the
1302 flattened target doesn't inherit those. */
1303 if (target_read (current_target
.beneath
, TARGET_OBJECT_MEMORY
, NULL
,
1304 myaddr
, memaddr
, len
) == len
)
1307 return TARGET_XFER_E_IO
;
1310 /* See target/target.h. */
1313 target_read_uint32 (CORE_ADDR memaddr
, uint32_t *result
)
1318 r
= target_read_memory (memaddr
, buf
, sizeof buf
);
1321 *result
= extract_unsigned_integer (buf
, sizeof buf
,
1322 gdbarch_byte_order (target_gdbarch ()));
1326 /* Like target_read_memory, but specify explicitly that this is a read
1327 from the target's raw memory. That is, this read bypasses the
1328 dcache, breakpoint shadowing, etc. */
1331 target_read_raw_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1333 /* See comment in target_read_memory about why the request starts at
1334 current_target.beneath. */
1335 if (target_read (current_target
.beneath
, TARGET_OBJECT_RAW_MEMORY
, NULL
,
1336 myaddr
, memaddr
, len
) == len
)
1339 return TARGET_XFER_E_IO
;
1342 /* Like target_read_memory, but specify explicitly that this is a read from
1343 the target's stack. This may trigger different cache behavior. */
1346 target_read_stack (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1348 /* See comment in target_read_memory about why the request starts at
1349 current_target.beneath. */
1350 if (target_read (current_target
.beneath
, TARGET_OBJECT_STACK_MEMORY
, NULL
,
1351 myaddr
, memaddr
, len
) == len
)
1354 return TARGET_XFER_E_IO
;
1357 /* Like target_read_memory, but specify explicitly that this is a read from
1358 the target's code. This may trigger different cache behavior. */
1361 target_read_code (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1363 /* See comment in target_read_memory about why the request starts at
1364 current_target.beneath. */
1365 if (target_read (current_target
.beneath
, TARGET_OBJECT_CODE_MEMORY
, NULL
,
1366 myaddr
, memaddr
, len
) == len
)
1369 return TARGET_XFER_E_IO
;
1372 /* Write LEN bytes from MYADDR to target memory at address MEMADDR.
1373 Returns either 0 for success or TARGET_XFER_E_IO if any
1374 error occurs. If an error occurs, no guarantee is made about how
1375 much data got written. Callers that can deal with partial writes
1376 should call target_write. */
1379 target_write_memory (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ssize_t len
)
1381 /* See comment in target_read_memory about why the request starts at
1382 current_target.beneath. */
1383 if (target_write (current_target
.beneath
, TARGET_OBJECT_MEMORY
, NULL
,
1384 myaddr
, memaddr
, len
) == len
)
1387 return TARGET_XFER_E_IO
;
1390 /* Write LEN bytes from MYADDR to target raw memory at address
1391 MEMADDR. Returns either 0 for success or TARGET_XFER_E_IO
1392 if any error occurs. If an error occurs, no guarantee is made
1393 about how much data got written. Callers that can deal with
1394 partial writes should call target_write. */
1397 target_write_raw_memory (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ssize_t len
)
1399 /* See comment in target_read_memory about why the request starts at
1400 current_target.beneath. */
1401 if (target_write (current_target
.beneath
, TARGET_OBJECT_RAW_MEMORY
, NULL
,
1402 myaddr
, memaddr
, len
) == len
)
1405 return TARGET_XFER_E_IO
;
1408 /* Fetch the target's memory map. */
1411 target_memory_map (void)
1413 VEC(mem_region_s
) *result
;
1414 struct mem_region
*last_one
, *this_one
;
1416 struct target_ops
*t
;
1418 result
= current_target
.to_memory_map (¤t_target
);
1422 qsort (VEC_address (mem_region_s
, result
),
1423 VEC_length (mem_region_s
, result
),
1424 sizeof (struct mem_region
), mem_region_cmp
);
1426 /* Check that regions do not overlap. Simultaneously assign
1427 a numbering for the "mem" commands to use to refer to
1430 for (ix
= 0; VEC_iterate (mem_region_s
, result
, ix
, this_one
); ix
++)
1432 this_one
->number
= ix
;
1434 if (last_one
&& last_one
->hi
> this_one
->lo
)
1436 warning (_("Overlapping regions in memory map: ignoring"));
1437 VEC_free (mem_region_s
, result
);
1440 last_one
= this_one
;
1447 target_flash_erase (ULONGEST address
, LONGEST length
)
1449 current_target
.to_flash_erase (¤t_target
, address
, length
);
1453 target_flash_done (void)
1455 current_target
.to_flash_done (¤t_target
);
1459 show_trust_readonly (struct ui_file
*file
, int from_tty
,
1460 struct cmd_list_element
*c
, const char *value
)
1462 fprintf_filtered (file
,
1463 _("Mode for reading from readonly sections is %s.\n"),
1467 /* Target vector read/write partial wrapper functions. */
1469 static enum target_xfer_status
1470 target_read_partial (struct target_ops
*ops
,
1471 enum target_object object
,
1472 const char *annex
, gdb_byte
*buf
,
1473 ULONGEST offset
, ULONGEST len
,
1474 ULONGEST
*xfered_len
)
1476 return target_xfer_partial (ops
, object
, annex
, buf
, NULL
, offset
, len
,
1480 static enum target_xfer_status
1481 target_write_partial (struct target_ops
*ops
,
1482 enum target_object object
,
1483 const char *annex
, const gdb_byte
*buf
,
1484 ULONGEST offset
, LONGEST len
, ULONGEST
*xfered_len
)
1486 return target_xfer_partial (ops
, object
, annex
, NULL
, buf
, offset
, len
,
1490 /* Wrappers to perform the full transfer. */
1492 /* For docs on target_read see target.h. */
1495 target_read (struct target_ops
*ops
,
1496 enum target_object object
,
1497 const char *annex
, gdb_byte
*buf
,
1498 ULONGEST offset
, LONGEST len
)
1502 while (xfered
< len
)
1504 ULONGEST xfered_len
;
1505 enum target_xfer_status status
;
1507 status
= target_read_partial (ops
, object
, annex
,
1508 (gdb_byte
*) buf
+ xfered
,
1509 offset
+ xfered
, len
- xfered
,
1512 /* Call an observer, notifying them of the xfer progress? */
1513 if (status
== TARGET_XFER_EOF
)
1515 else if (status
== TARGET_XFER_OK
)
1517 xfered
+= xfered_len
;
1527 /* Assuming that the entire [begin, end) range of memory cannot be
1528 read, try to read whatever subrange is possible to read.
1530 The function returns, in RESULT, either zero or one memory block.
1531 If there's a readable subrange at the beginning, it is completely
1532 read and returned. Any further readable subrange will not be read.
1533 Otherwise, if there's a readable subrange at the end, it will be
1534 completely read and returned. Any readable subranges before it
1535 (obviously, not starting at the beginning), will be ignored. In
1536 other cases -- either no readable subrange, or readable subrange(s)
1537 that is neither at the beginning, or end, nothing is returned.
1539 The purpose of this function is to handle a read across a boundary
1540 of accessible memory in a case when memory map is not available.
1541 The above restrictions are fine for this case, but will give
1542 incorrect results if the memory is 'patchy'. However, supporting
1543 'patchy' memory would require trying to read every single byte,
1544 and it seems unacceptable solution. Explicit memory map is
1545 recommended for this case -- and target_read_memory_robust will
1546 take care of reading multiple ranges then. */
1549 read_whatever_is_readable (struct target_ops
*ops
,
1550 ULONGEST begin
, ULONGEST end
,
1551 VEC(memory_read_result_s
) **result
)
1553 gdb_byte
*buf
= xmalloc (end
- begin
);
1554 ULONGEST current_begin
= begin
;
1555 ULONGEST current_end
= end
;
1557 memory_read_result_s r
;
1558 ULONGEST xfered_len
;
1560 /* If we previously failed to read 1 byte, nothing can be done here. */
1561 if (end
- begin
<= 1)
1567 /* Check that either first or the last byte is readable, and give up
1568 if not. This heuristic is meant to permit reading accessible memory
1569 at the boundary of accessible region. */
1570 if (target_read_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1571 buf
, begin
, 1, &xfered_len
) == TARGET_XFER_OK
)
1576 else if (target_read_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1577 buf
+ (end
-begin
) - 1, end
- 1, 1,
1578 &xfered_len
) == TARGET_XFER_OK
)
1589 /* Loop invariant is that the [current_begin, current_end) was previously
1590 found to be not readable as a whole.
1592 Note loop condition -- if the range has 1 byte, we can't divide the range
1593 so there's no point trying further. */
1594 while (current_end
- current_begin
> 1)
1596 ULONGEST first_half_begin
, first_half_end
;
1597 ULONGEST second_half_begin
, second_half_end
;
1599 ULONGEST middle
= current_begin
+ (current_end
- current_begin
)/2;
1603 first_half_begin
= current_begin
;
1604 first_half_end
= middle
;
1605 second_half_begin
= middle
;
1606 second_half_end
= current_end
;
1610 first_half_begin
= middle
;
1611 first_half_end
= current_end
;
1612 second_half_begin
= current_begin
;
1613 second_half_end
= middle
;
1616 xfer
= target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1617 buf
+ (first_half_begin
- begin
),
1619 first_half_end
- first_half_begin
);
1621 if (xfer
== first_half_end
- first_half_begin
)
1623 /* This half reads up fine. So, the error must be in the
1625 current_begin
= second_half_begin
;
1626 current_end
= second_half_end
;
1630 /* This half is not readable. Because we've tried one byte, we
1631 know some part of this half if actually redable. Go to the next
1632 iteration to divide again and try to read.
1634 We don't handle the other half, because this function only tries
1635 to read a single readable subrange. */
1636 current_begin
= first_half_begin
;
1637 current_end
= first_half_end
;
1643 /* The [begin, current_begin) range has been read. */
1645 r
.end
= current_begin
;
1650 /* The [current_end, end) range has been read. */
1651 LONGEST rlen
= end
- current_end
;
1653 r
.data
= xmalloc (rlen
);
1654 memcpy (r
.data
, buf
+ current_end
- begin
, rlen
);
1655 r
.begin
= current_end
;
1659 VEC_safe_push(memory_read_result_s
, (*result
), &r
);
1663 free_memory_read_result_vector (void *x
)
1665 VEC(memory_read_result_s
) *v
= x
;
1666 memory_read_result_s
*current
;
1669 for (ix
= 0; VEC_iterate (memory_read_result_s
, v
, ix
, current
); ++ix
)
1671 xfree (current
->data
);
1673 VEC_free (memory_read_result_s
, v
);
1676 VEC(memory_read_result_s
) *
1677 read_memory_robust (struct target_ops
*ops
, ULONGEST offset
, LONGEST len
)
1679 VEC(memory_read_result_s
) *result
= 0;
1682 while (xfered
< len
)
1684 struct mem_region
*region
= lookup_mem_region (offset
+ xfered
);
1687 /* If there is no explicit region, a fake one should be created. */
1688 gdb_assert (region
);
1690 if (region
->hi
== 0)
1691 rlen
= len
- xfered
;
1693 rlen
= region
->hi
- offset
;
1695 if (region
->attrib
.mode
== MEM_NONE
|| region
->attrib
.mode
== MEM_WO
)
1697 /* Cannot read this region. Note that we can end up here only
1698 if the region is explicitly marked inaccessible, or
1699 'inaccessible-by-default' is in effect. */
1704 LONGEST to_read
= min (len
- xfered
, rlen
);
1705 gdb_byte
*buffer
= (gdb_byte
*)xmalloc (to_read
);
1707 LONGEST xfer
= target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1708 (gdb_byte
*) buffer
,
1709 offset
+ xfered
, to_read
);
1710 /* Call an observer, notifying them of the xfer progress? */
1713 /* Got an error reading full chunk. See if maybe we can read
1716 read_whatever_is_readable (ops
, offset
+ xfered
,
1717 offset
+ xfered
+ to_read
, &result
);
1722 struct memory_read_result r
;
1724 r
.begin
= offset
+ xfered
;
1725 r
.end
= r
.begin
+ xfer
;
1726 VEC_safe_push (memory_read_result_s
, result
, &r
);
1736 /* An alternative to target_write with progress callbacks. */
1739 target_write_with_progress (struct target_ops
*ops
,
1740 enum target_object object
,
1741 const char *annex
, const gdb_byte
*buf
,
1742 ULONGEST offset
, LONGEST len
,
1743 void (*progress
) (ULONGEST
, void *), void *baton
)
1747 /* Give the progress callback a chance to set up. */
1749 (*progress
) (0, baton
);
1751 while (xfered
< len
)
1753 ULONGEST xfered_len
;
1754 enum target_xfer_status status
;
1756 status
= target_write_partial (ops
, object
, annex
,
1757 (gdb_byte
*) buf
+ xfered
,
1758 offset
+ xfered
, len
- xfered
,
1761 if (status
!= TARGET_XFER_OK
)
1762 return status
== TARGET_XFER_EOF
? xfered
: -1;
1765 (*progress
) (xfered_len
, baton
);
1767 xfered
+= xfered_len
;
1773 /* For docs on target_write see target.h. */
1776 target_write (struct target_ops
*ops
,
1777 enum target_object object
,
1778 const char *annex
, const gdb_byte
*buf
,
1779 ULONGEST offset
, LONGEST len
)
1781 return target_write_with_progress (ops
, object
, annex
, buf
, offset
, len
,
1785 /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return
1786 the size of the transferred data. PADDING additional bytes are
1787 available in *BUF_P. This is a helper function for
1788 target_read_alloc; see the declaration of that function for more
1792 target_read_alloc_1 (struct target_ops
*ops
, enum target_object object
,
1793 const char *annex
, gdb_byte
**buf_p
, int padding
)
1795 size_t buf_alloc
, buf_pos
;
1798 /* This function does not have a length parameter; it reads the
1799 entire OBJECT). Also, it doesn't support objects fetched partly
1800 from one target and partly from another (in a different stratum,
1801 e.g. a core file and an executable). Both reasons make it
1802 unsuitable for reading memory. */
1803 gdb_assert (object
!= TARGET_OBJECT_MEMORY
);
1805 /* Start by reading up to 4K at a time. The target will throttle
1806 this number down if necessary. */
1808 buf
= xmalloc (buf_alloc
);
1812 ULONGEST xfered_len
;
1813 enum target_xfer_status status
;
1815 status
= target_read_partial (ops
, object
, annex
, &buf
[buf_pos
],
1816 buf_pos
, buf_alloc
- buf_pos
- padding
,
1819 if (status
== TARGET_XFER_EOF
)
1821 /* Read all there was. */
1828 else if (status
!= TARGET_XFER_OK
)
1830 /* An error occurred. */
1832 return TARGET_XFER_E_IO
;
1835 buf_pos
+= xfered_len
;
1837 /* If the buffer is filling up, expand it. */
1838 if (buf_alloc
< buf_pos
* 2)
1841 buf
= xrealloc (buf
, buf_alloc
);
1848 /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return
1849 the size of the transferred data. See the declaration in "target.h"
1850 function for more information about the return value. */
1853 target_read_alloc (struct target_ops
*ops
, enum target_object object
,
1854 const char *annex
, gdb_byte
**buf_p
)
1856 return target_read_alloc_1 (ops
, object
, annex
, buf_p
, 0);
1859 /* Read OBJECT/ANNEX using OPS. The result is NUL-terminated and
1860 returned as a string, allocated using xmalloc. If an error occurs
1861 or the transfer is unsupported, NULL is returned. Empty objects
1862 are returned as allocated but empty strings. A warning is issued
1863 if the result contains any embedded NUL bytes. */
1866 target_read_stralloc (struct target_ops
*ops
, enum target_object object
,
1871 LONGEST i
, transferred
;
1873 transferred
= target_read_alloc_1 (ops
, object
, annex
, &buffer
, 1);
1874 bufstr
= (char *) buffer
;
1876 if (transferred
< 0)
1879 if (transferred
== 0)
1880 return xstrdup ("");
1882 bufstr
[transferred
] = 0;
1884 /* Check for embedded NUL bytes; but allow trailing NULs. */
1885 for (i
= strlen (bufstr
); i
< transferred
; i
++)
1888 warning (_("target object %d, annex %s, "
1889 "contained unexpected null characters"),
1890 (int) object
, annex
? annex
: "(none)");
1897 /* Memory transfer methods. */
1900 get_target_memory (struct target_ops
*ops
, CORE_ADDR addr
, gdb_byte
*buf
,
1903 /* This method is used to read from an alternate, non-current
1904 target. This read must bypass the overlay support (as symbols
1905 don't match this target), and GDB's internal cache (wrong cache
1906 for this target). */
1907 if (target_read (ops
, TARGET_OBJECT_RAW_MEMORY
, NULL
, buf
, addr
, len
)
1909 memory_error (TARGET_XFER_E_IO
, addr
);
1913 get_target_memory_unsigned (struct target_ops
*ops
, CORE_ADDR addr
,
1914 int len
, enum bfd_endian byte_order
)
1916 gdb_byte buf
[sizeof (ULONGEST
)];
1918 gdb_assert (len
<= sizeof (buf
));
1919 get_target_memory (ops
, addr
, buf
, len
);
1920 return extract_unsigned_integer (buf
, len
, byte_order
);
1926 target_insert_breakpoint (struct gdbarch
*gdbarch
,
1927 struct bp_target_info
*bp_tgt
)
1929 if (!may_insert_breakpoints
)
1931 warning (_("May not insert breakpoints"));
1935 return current_target
.to_insert_breakpoint (¤t_target
,
1942 target_remove_breakpoint (struct gdbarch
*gdbarch
,
1943 struct bp_target_info
*bp_tgt
)
1945 /* This is kind of a weird case to handle, but the permission might
1946 have been changed after breakpoints were inserted - in which case
1947 we should just take the user literally and assume that any
1948 breakpoints should be left in place. */
1949 if (!may_insert_breakpoints
)
1951 warning (_("May not remove breakpoints"));
1955 return current_target
.to_remove_breakpoint (¤t_target
,
1960 target_info (char *args
, int from_tty
)
1962 struct target_ops
*t
;
1963 int has_all_mem
= 0;
1965 if (symfile_objfile
!= NULL
)
1966 printf_unfiltered (_("Symbols from \"%s\".\n"),
1967 objfile_name (symfile_objfile
));
1969 for (t
= target_stack
; t
!= NULL
; t
= t
->beneath
)
1971 if (!(*t
->to_has_memory
) (t
))
1974 if ((int) (t
->to_stratum
) <= (int) dummy_stratum
)
1977 printf_unfiltered (_("\tWhile running this, "
1978 "GDB does not access memory from...\n"));
1979 printf_unfiltered ("%s:\n", t
->to_longname
);
1980 (t
->to_files_info
) (t
);
1981 has_all_mem
= (*t
->to_has_all_memory
) (t
);
1985 /* This function is called before any new inferior is created, e.g.
1986 by running a program, attaching, or connecting to a target.
1987 It cleans up any state from previous invocations which might
1988 change between runs. This is a subset of what target_preopen
1989 resets (things which might change between targets). */
1992 target_pre_inferior (int from_tty
)
1994 /* Clear out solib state. Otherwise the solib state of the previous
1995 inferior might have survived and is entirely wrong for the new
1996 target. This has been observed on GNU/Linux using glibc 2.3. How
2008 Cannot access memory at address 0xdeadbeef
2011 /* In some OSs, the shared library list is the same/global/shared
2012 across inferiors. If code is shared between processes, so are
2013 memory regions and features. */
2014 if (!gdbarch_has_global_solist (target_gdbarch ()))
2016 no_shared_libraries (NULL
, from_tty
);
2018 invalidate_target_mem_regions ();
2020 target_clear_description ();
2023 agent_capability_invalidate ();
2026 /* Callback for iterate_over_inferiors. Gets rid of the given
2030 dispose_inferior (struct inferior
*inf
, void *args
)
2032 struct thread_info
*thread
;
2034 thread
= any_thread_of_process (inf
->pid
);
2037 switch_to_thread (thread
->ptid
);
2039 /* Core inferiors actually should be detached, not killed. */
2040 if (target_has_execution
)
2043 target_detach (NULL
, 0);
2049 /* This is to be called by the open routine before it does
2053 target_preopen (int from_tty
)
2057 if (have_inferiors ())
2060 || !have_live_inferiors ()
2061 || query (_("A program is being debugged already. Kill it? ")))
2062 iterate_over_inferiors (dispose_inferior
, NULL
);
2064 error (_("Program not killed."));
2067 /* Calling target_kill may remove the target from the stack. But if
2068 it doesn't (which seems like a win for UDI), remove it now. */
2069 /* Leave the exec target, though. The user may be switching from a
2070 live process to a core of the same program. */
2071 pop_all_targets_above (file_stratum
);
2073 target_pre_inferior (from_tty
);
2076 /* Detach a target after doing deferred register stores. */
2079 target_detach (const char *args
, int from_tty
)
2081 struct target_ops
* t
;
2083 if (gdbarch_has_global_breakpoints (target_gdbarch ()))
2084 /* Don't remove global breakpoints here. They're removed on
2085 disconnection from the target. */
2088 /* If we're in breakpoints-always-inserted mode, have to remove
2089 them before detaching. */
2090 remove_breakpoints_pid (ptid_get_pid (inferior_ptid
));
2092 prepare_for_detach ();
2094 current_target
.to_detach (¤t_target
, args
, from_tty
);
2098 target_disconnect (const char *args
, int from_tty
)
2100 /* If we're in breakpoints-always-inserted mode or if breakpoints
2101 are global across processes, we have to remove them before
2103 remove_breakpoints ();
2105 current_target
.to_disconnect (¤t_target
, args
, from_tty
);
2109 target_wait (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
2111 return (current_target
.to_wait
) (¤t_target
, ptid
, status
, options
);
2115 target_pid_to_str (ptid_t ptid
)
2117 return (*current_target
.to_pid_to_str
) (¤t_target
, ptid
);
2121 target_thread_name (struct thread_info
*info
)
2123 return current_target
.to_thread_name (¤t_target
, info
);
2127 target_resume (ptid_t ptid
, int step
, enum gdb_signal signal
)
2129 struct target_ops
*t
;
2131 target_dcache_invalidate ();
2133 current_target
.to_resume (¤t_target
, ptid
, step
, signal
);
2135 registers_changed_ptid (ptid
);
2136 /* We only set the internal executing state here. The user/frontend
2137 running state is set at a higher level. */
2138 set_executing (ptid
, 1);
2139 clear_inline_frame_state (ptid
);
2143 target_pass_signals (int numsigs
, unsigned char *pass_signals
)
2145 (*current_target
.to_pass_signals
) (¤t_target
, numsigs
, pass_signals
);
2149 target_program_signals (int numsigs
, unsigned char *program_signals
)
2151 (*current_target
.to_program_signals
) (¤t_target
,
2152 numsigs
, program_signals
);
2156 default_follow_fork (struct target_ops
*self
, int follow_child
,
2159 /* Some target returned a fork event, but did not know how to follow it. */
2160 internal_error (__FILE__
, __LINE__
,
2161 _("could not find a target to follow fork"));
2164 /* Look through the list of possible targets for a target that can
2168 target_follow_fork (int follow_child
, int detach_fork
)
2170 return current_target
.to_follow_fork (¤t_target
,
2171 follow_child
, detach_fork
);
2175 default_mourn_inferior (struct target_ops
*self
)
2177 internal_error (__FILE__
, __LINE__
,
2178 _("could not find a target to follow mourn inferior"));
2182 target_mourn_inferior (void)
2184 current_target
.to_mourn_inferior (¤t_target
);
2186 /* We no longer need to keep handles on any of the object files.
2187 Make sure to release them to avoid unnecessarily locking any
2188 of them while we're not actually debugging. */
2189 bfd_cache_close_all ();
2192 /* Look for a target which can describe architectural features, starting
2193 from TARGET. If we find one, return its description. */
2195 const struct target_desc
*
2196 target_read_description (struct target_ops
*target
)
2198 return target
->to_read_description (target
);
2201 /* This implements a basic search of memory, reading target memory and
2202 performing the search here (as opposed to performing the search in on the
2203 target side with, for example, gdbserver). */
2206 simple_search_memory (struct target_ops
*ops
,
2207 CORE_ADDR start_addr
, ULONGEST search_space_len
,
2208 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2209 CORE_ADDR
*found_addrp
)
2211 /* NOTE: also defined in find.c testcase. */
2212 #define SEARCH_CHUNK_SIZE 16000
2213 const unsigned chunk_size
= SEARCH_CHUNK_SIZE
;
2214 /* Buffer to hold memory contents for searching. */
2215 gdb_byte
*search_buf
;
2216 unsigned search_buf_size
;
2217 struct cleanup
*old_cleanups
;
2219 search_buf_size
= chunk_size
+ pattern_len
- 1;
2221 /* No point in trying to allocate a buffer larger than the search space. */
2222 if (search_space_len
< search_buf_size
)
2223 search_buf_size
= search_space_len
;
2225 search_buf
= malloc (search_buf_size
);
2226 if (search_buf
== NULL
)
2227 error (_("Unable to allocate memory to perform the search."));
2228 old_cleanups
= make_cleanup (free_current_contents
, &search_buf
);
2230 /* Prime the search buffer. */
2232 if (target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2233 search_buf
, start_addr
, search_buf_size
) != search_buf_size
)
2235 warning (_("Unable to access %s bytes of target "
2236 "memory at %s, halting search."),
2237 pulongest (search_buf_size
), hex_string (start_addr
));
2238 do_cleanups (old_cleanups
);
2242 /* Perform the search.
2244 The loop is kept simple by allocating [N + pattern-length - 1] bytes.
2245 When we've scanned N bytes we copy the trailing bytes to the start and
2246 read in another N bytes. */
2248 while (search_space_len
>= pattern_len
)
2250 gdb_byte
*found_ptr
;
2251 unsigned nr_search_bytes
= min (search_space_len
, search_buf_size
);
2253 found_ptr
= memmem (search_buf
, nr_search_bytes
,
2254 pattern
, pattern_len
);
2256 if (found_ptr
!= NULL
)
2258 CORE_ADDR found_addr
= start_addr
+ (found_ptr
- search_buf
);
2260 *found_addrp
= found_addr
;
2261 do_cleanups (old_cleanups
);
2265 /* Not found in this chunk, skip to next chunk. */
2267 /* Don't let search_space_len wrap here, it's unsigned. */
2268 if (search_space_len
>= chunk_size
)
2269 search_space_len
-= chunk_size
;
2271 search_space_len
= 0;
2273 if (search_space_len
>= pattern_len
)
2275 unsigned keep_len
= search_buf_size
- chunk_size
;
2276 CORE_ADDR read_addr
= start_addr
+ chunk_size
+ keep_len
;
2279 /* Copy the trailing part of the previous iteration to the front
2280 of the buffer for the next iteration. */
2281 gdb_assert (keep_len
== pattern_len
- 1);
2282 memcpy (search_buf
, search_buf
+ chunk_size
, keep_len
);
2284 nr_to_read
= min (search_space_len
- keep_len
, chunk_size
);
2286 if (target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2287 search_buf
+ keep_len
, read_addr
,
2288 nr_to_read
) != nr_to_read
)
2290 warning (_("Unable to access %s bytes of target "
2291 "memory at %s, halting search."),
2292 plongest (nr_to_read
),
2293 hex_string (read_addr
));
2294 do_cleanups (old_cleanups
);
2298 start_addr
+= chunk_size
;
2304 do_cleanups (old_cleanups
);
2308 /* Default implementation of memory-searching. */
2311 default_search_memory (struct target_ops
*self
,
2312 CORE_ADDR start_addr
, ULONGEST search_space_len
,
2313 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2314 CORE_ADDR
*found_addrp
)
2316 /* Start over from the top of the target stack. */
2317 return simple_search_memory (current_target
.beneath
,
2318 start_addr
, search_space_len
,
2319 pattern
, pattern_len
, found_addrp
);
2322 /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the
2323 sequence of bytes in PATTERN with length PATTERN_LEN.
2325 The result is 1 if found, 0 if not found, and -1 if there was an error
2326 requiring halting of the search (e.g. memory read error).
2327 If the pattern is found the address is recorded in FOUND_ADDRP. */
2330 target_search_memory (CORE_ADDR start_addr
, ULONGEST search_space_len
,
2331 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2332 CORE_ADDR
*found_addrp
)
2334 return current_target
.to_search_memory (¤t_target
, start_addr
,
2336 pattern
, pattern_len
, found_addrp
);
2339 /* Look through the currently pushed targets. If none of them will
2340 be able to restart the currently running process, issue an error
2344 target_require_runnable (void)
2346 struct target_ops
*t
;
2348 for (t
= target_stack
; t
!= NULL
; t
= t
->beneath
)
2350 /* If this target knows how to create a new program, then
2351 assume we will still be able to after killing the current
2352 one. Either killing and mourning will not pop T, or else
2353 find_default_run_target will find it again. */
2354 if (t
->to_create_inferior
!= NULL
)
2357 /* Do not worry about targets at certain strata that can not
2358 create inferiors. Assume they will be pushed again if
2359 necessary, and continue to the process_stratum. */
2360 if (t
->to_stratum
== thread_stratum
2361 || t
->to_stratum
== record_stratum
2362 || t
->to_stratum
== arch_stratum
)
2365 error (_("The \"%s\" target does not support \"run\". "
2366 "Try \"help target\" or \"continue\"."),
2370 /* This function is only called if the target is running. In that
2371 case there should have been a process_stratum target and it
2372 should either know how to create inferiors, or not... */
2373 internal_error (__FILE__
, __LINE__
, _("No targets found"));
2376 /* Whether GDB is allowed to fall back to the default run target for
2377 "run", "attach", etc. when no target is connected yet. */
2378 static int auto_connect_native_target
= 1;
2381 show_auto_connect_native_target (struct ui_file
*file
, int from_tty
,
2382 struct cmd_list_element
*c
, const char *value
)
2384 fprintf_filtered (file
,
2385 _("Whether GDB may automatically connect to the "
2386 "native target is %s.\n"),
2390 /* Look through the list of possible targets for a target that can
2391 execute a run or attach command without any other data. This is
2392 used to locate the default process stratum.
2394 If DO_MESG is not NULL, the result is always valid (error() is
2395 called for errors); else, return NULL on error. */
2397 static struct target_ops
*
2398 find_default_run_target (char *do_mesg
)
2400 struct target_ops
*runable
= NULL
;
2402 if (auto_connect_native_target
)
2404 struct target_ops
*t
;
2408 for (i
= 0; VEC_iterate (target_ops_p
, target_structs
, i
, t
); ++i
)
2410 if (t
->to_can_run
!= delegate_can_run
&& target_can_run (t
))
2421 if (runable
== NULL
)
2424 error (_("Don't know how to %s. Try \"help target\"."), do_mesg
);
2435 find_attach_target (void)
2437 struct target_ops
*t
;
2439 /* If a target on the current stack can attach, use it. */
2440 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2442 if (t
->to_attach
!= NULL
)
2446 /* Otherwise, use the default run target for attaching. */
2448 t
= find_default_run_target ("attach");
2456 find_run_target (void)
2458 struct target_ops
*t
;
2460 /* If a target on the current stack can attach, use it. */
2461 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2463 if (t
->to_create_inferior
!= NULL
)
2467 /* Otherwise, use the default run target. */
2469 t
= find_default_run_target ("run");
2474 /* Implement the "info proc" command. */
2477 target_info_proc (const char *args
, enum info_proc_what what
)
2479 struct target_ops
*t
;
2481 /* If we're already connected to something that can get us OS
2482 related data, use it. Otherwise, try using the native
2484 if (current_target
.to_stratum
>= process_stratum
)
2485 t
= current_target
.beneath
;
2487 t
= find_default_run_target (NULL
);
2489 for (; t
!= NULL
; t
= t
->beneath
)
2491 if (t
->to_info_proc
!= NULL
)
2493 t
->to_info_proc (t
, args
, what
);
2496 fprintf_unfiltered (gdb_stdlog
,
2497 "target_info_proc (\"%s\", %d)\n", args
, what
);
2507 find_default_supports_disable_randomization (struct target_ops
*self
)
2509 struct target_ops
*t
;
2511 t
= find_default_run_target (NULL
);
2512 if (t
&& t
->to_supports_disable_randomization
)
2513 return (t
->to_supports_disable_randomization
) (t
);
2518 target_supports_disable_randomization (void)
2520 struct target_ops
*t
;
2522 for (t
= ¤t_target
; t
!= NULL
; t
= t
->beneath
)
2523 if (t
->to_supports_disable_randomization
)
2524 return t
->to_supports_disable_randomization (t
);
2530 target_get_osdata (const char *type
)
2532 struct target_ops
*t
;
2534 /* If we're already connected to something that can get us OS
2535 related data, use it. Otherwise, try using the native
2537 if (current_target
.to_stratum
>= process_stratum
)
2538 t
= current_target
.beneath
;
2540 t
= find_default_run_target ("get OS data");
2545 return target_read_stralloc (t
, TARGET_OBJECT_OSDATA
, type
);
2548 static struct address_space
*
2549 default_thread_address_space (struct target_ops
*self
, ptid_t ptid
)
2551 struct inferior
*inf
;
2553 /* Fall-back to the "main" address space of the inferior. */
2554 inf
= find_inferior_pid (ptid_get_pid (ptid
));
2556 if (inf
== NULL
|| inf
->aspace
== NULL
)
2557 internal_error (__FILE__
, __LINE__
,
2558 _("Can't determine the current "
2559 "address space of thread %s\n"),
2560 target_pid_to_str (ptid
));
2565 /* Determine the current address space of thread PTID. */
2567 struct address_space
*
2568 target_thread_address_space (ptid_t ptid
)
2570 struct address_space
*aspace
;
2572 aspace
= current_target
.to_thread_address_space (¤t_target
, ptid
);
2573 gdb_assert (aspace
!= NULL
);
2579 /* Target file operations. */
2581 static struct target_ops
*
2582 default_fileio_target (void)
2584 /* If we're already connected to something that can perform
2585 file I/O, use it. Otherwise, try using the native target. */
2586 if (current_target
.to_stratum
>= process_stratum
)
2587 return current_target
.beneath
;
2589 return find_default_run_target ("file I/O");
2592 /* Open FILENAME on the target, using FLAGS and MODE. Return a
2593 target file descriptor, or -1 if an error occurs (and set
2596 target_fileio_open (const char *filename
, int flags
, int mode
,
2599 struct target_ops
*t
;
2601 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
2603 if (t
->to_fileio_open
!= NULL
)
2605 int fd
= t
->to_fileio_open (t
, filename
, flags
, mode
, target_errno
);
2608 fprintf_unfiltered (gdb_stdlog
,
2609 "target_fileio_open (%s,0x%x,0%o) = %d (%d)\n",
2610 filename
, flags
, mode
,
2611 fd
, fd
!= -1 ? 0 : *target_errno
);
2616 *target_errno
= FILEIO_ENOSYS
;
2620 /* Write up to LEN bytes from WRITE_BUF to FD on the target.
2621 Return the number of bytes written, or -1 if an error occurs
2622 (and set *TARGET_ERRNO). */
2624 target_fileio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
2625 ULONGEST offset
, int *target_errno
)
2627 struct target_ops
*t
;
2629 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
2631 if (t
->to_fileio_pwrite
!= NULL
)
2633 int ret
= t
->to_fileio_pwrite (t
, fd
, write_buf
, len
, offset
,
2637 fprintf_unfiltered (gdb_stdlog
,
2638 "target_fileio_pwrite (%d,...,%d,%s) "
2640 fd
, len
, pulongest (offset
),
2641 ret
, ret
!= -1 ? 0 : *target_errno
);
2646 *target_errno
= FILEIO_ENOSYS
;
2650 /* Read up to LEN bytes FD on the target into READ_BUF.
2651 Return the number of bytes read, or -1 if an error occurs
2652 (and set *TARGET_ERRNO). */
2654 target_fileio_pread (int fd
, gdb_byte
*read_buf
, int len
,
2655 ULONGEST offset
, int *target_errno
)
2657 struct target_ops
*t
;
2659 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
2661 if (t
->to_fileio_pread
!= NULL
)
2663 int ret
= t
->to_fileio_pread (t
, fd
, read_buf
, len
, offset
,
2667 fprintf_unfiltered (gdb_stdlog
,
2668 "target_fileio_pread (%d,...,%d,%s) "
2670 fd
, len
, pulongest (offset
),
2671 ret
, ret
!= -1 ? 0 : *target_errno
);
2676 *target_errno
= FILEIO_ENOSYS
;
2680 /* Close FD on the target. Return 0, or -1 if an error occurs
2681 (and set *TARGET_ERRNO). */
2683 target_fileio_close (int fd
, int *target_errno
)
2685 struct target_ops
*t
;
2687 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
2689 if (t
->to_fileio_close
!= NULL
)
2691 int ret
= t
->to_fileio_close (t
, fd
, target_errno
);
2694 fprintf_unfiltered (gdb_stdlog
,
2695 "target_fileio_close (%d) = %d (%d)\n",
2696 fd
, ret
, ret
!= -1 ? 0 : *target_errno
);
2701 *target_errno
= FILEIO_ENOSYS
;
2705 /* Unlink FILENAME on the target. Return 0, or -1 if an error
2706 occurs (and set *TARGET_ERRNO). */
2708 target_fileio_unlink (const char *filename
, int *target_errno
)
2710 struct target_ops
*t
;
2712 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
2714 if (t
->to_fileio_unlink
!= NULL
)
2716 int ret
= t
->to_fileio_unlink (t
, filename
, target_errno
);
2719 fprintf_unfiltered (gdb_stdlog
,
2720 "target_fileio_unlink (%s) = %d (%d)\n",
2721 filename
, ret
, ret
!= -1 ? 0 : *target_errno
);
2726 *target_errno
= FILEIO_ENOSYS
;
2730 /* Read value of symbolic link FILENAME on the target. Return a
2731 null-terminated string allocated via xmalloc, or NULL if an error
2732 occurs (and set *TARGET_ERRNO). */
2734 target_fileio_readlink (const char *filename
, int *target_errno
)
2736 struct target_ops
*t
;
2738 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
2740 if (t
->to_fileio_readlink
!= NULL
)
2742 char *ret
= t
->to_fileio_readlink (t
, filename
, target_errno
);
2745 fprintf_unfiltered (gdb_stdlog
,
2746 "target_fileio_readlink (%s) = %s (%d)\n",
2747 filename
, ret
? ret
: "(nil)",
2748 ret
? 0 : *target_errno
);
2753 *target_errno
= FILEIO_ENOSYS
;
2758 target_fileio_close_cleanup (void *opaque
)
2760 int fd
= *(int *) opaque
;
2763 target_fileio_close (fd
, &target_errno
);
2766 /* Read target file FILENAME. Store the result in *BUF_P and
2767 return the size of the transferred data. PADDING additional bytes are
2768 available in *BUF_P. This is a helper function for
2769 target_fileio_read_alloc; see the declaration of that function for more
2773 target_fileio_read_alloc_1 (const char *filename
,
2774 gdb_byte
**buf_p
, int padding
)
2776 struct cleanup
*close_cleanup
;
2777 size_t buf_alloc
, buf_pos
;
2783 fd
= target_fileio_open (filename
, FILEIO_O_RDONLY
, 0700, &target_errno
);
2787 close_cleanup
= make_cleanup (target_fileio_close_cleanup
, &fd
);
2789 /* Start by reading up to 4K at a time. The target will throttle
2790 this number down if necessary. */
2792 buf
= xmalloc (buf_alloc
);
2796 n
= target_fileio_pread (fd
, &buf
[buf_pos
],
2797 buf_alloc
- buf_pos
- padding
, buf_pos
,
2801 /* An error occurred. */
2802 do_cleanups (close_cleanup
);
2808 /* Read all there was. */
2809 do_cleanups (close_cleanup
);
2819 /* If the buffer is filling up, expand it. */
2820 if (buf_alloc
< buf_pos
* 2)
2823 buf
= xrealloc (buf
, buf_alloc
);
2830 /* Read target file FILENAME. Store the result in *BUF_P and return
2831 the size of the transferred data. See the declaration in "target.h"
2832 function for more information about the return value. */
2835 target_fileio_read_alloc (const char *filename
, gdb_byte
**buf_p
)
2837 return target_fileio_read_alloc_1 (filename
, buf_p
, 0);
2840 /* Read target file FILENAME. The result is NUL-terminated and
2841 returned as a string, allocated using xmalloc. If an error occurs
2842 or the transfer is unsupported, NULL is returned. Empty objects
2843 are returned as allocated but empty strings. A warning is issued
2844 if the result contains any embedded NUL bytes. */
2847 target_fileio_read_stralloc (const char *filename
)
2851 LONGEST i
, transferred
;
2853 transferred
= target_fileio_read_alloc_1 (filename
, &buffer
, 1);
2854 bufstr
= (char *) buffer
;
2856 if (transferred
< 0)
2859 if (transferred
== 0)
2860 return xstrdup ("");
2862 bufstr
[transferred
] = 0;
2864 /* Check for embedded NUL bytes; but allow trailing NULs. */
2865 for (i
= strlen (bufstr
); i
< transferred
; i
++)
2868 warning (_("target file %s "
2869 "contained unexpected null characters"),
2879 default_region_ok_for_hw_watchpoint (struct target_ops
*self
,
2880 CORE_ADDR addr
, int len
)
2882 return (len
<= gdbarch_ptr_bit (target_gdbarch ()) / TARGET_CHAR_BIT
);
2886 default_watchpoint_addr_within_range (struct target_ops
*target
,
2888 CORE_ADDR start
, int length
)
2890 return addr
>= start
&& addr
< start
+ length
;
2893 static struct gdbarch
*
2894 default_thread_architecture (struct target_ops
*ops
, ptid_t ptid
)
2896 return target_gdbarch ();
2900 return_zero (struct target_ops
*ignore
)
2906 return_zero_has_execution (struct target_ops
*ignore
, ptid_t ignore2
)
2912 * Find the next target down the stack from the specified target.
2916 find_target_beneath (struct target_ops
*t
)
2924 find_target_at (enum strata stratum
)
2926 struct target_ops
*t
;
2928 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2929 if (t
->to_stratum
== stratum
)
2936 /* The inferior process has died. Long live the inferior! */
2939 generic_mourn_inferior (void)
2943 ptid
= inferior_ptid
;
2944 inferior_ptid
= null_ptid
;
2946 /* Mark breakpoints uninserted in case something tries to delete a
2947 breakpoint while we delete the inferior's threads (which would
2948 fail, since the inferior is long gone). */
2949 mark_breakpoints_out ();
2951 if (!ptid_equal (ptid
, null_ptid
))
2953 int pid
= ptid_get_pid (ptid
);
2954 exit_inferior (pid
);
2957 /* Note this wipes step-resume breakpoints, so needs to be done
2958 after exit_inferior, which ends up referencing the step-resume
2959 breakpoints through clear_thread_inferior_resources. */
2960 breakpoint_init_inferior (inf_exited
);
2962 registers_changed ();
2964 reopen_exec_file ();
2965 reinit_frame_cache ();
2967 if (deprecated_detach_hook
)
2968 deprecated_detach_hook ();
2971 /* Convert a normal process ID to a string. Returns the string in a
2975 normal_pid_to_str (ptid_t ptid
)
2977 static char buf
[32];
2979 xsnprintf (buf
, sizeof buf
, "process %d", ptid_get_pid (ptid
));
2984 default_pid_to_str (struct target_ops
*ops
, ptid_t ptid
)
2986 return normal_pid_to_str (ptid
);
2989 /* Error-catcher for target_find_memory_regions. */
2991 dummy_find_memory_regions (struct target_ops
*self
,
2992 find_memory_region_ftype ignore1
, void *ignore2
)
2994 error (_("Command not implemented for this target."));
2998 /* Error-catcher for target_make_corefile_notes. */
3000 dummy_make_corefile_notes (struct target_ops
*self
,
3001 bfd
*ignore1
, int *ignore2
)
3003 error (_("Command not implemented for this target."));
3007 /* Set up the handful of non-empty slots needed by the dummy target
3011 init_dummy_target (void)
3013 dummy_target
.to_shortname
= "None";
3014 dummy_target
.to_longname
= "None";
3015 dummy_target
.to_doc
= "";
3016 dummy_target
.to_supports_disable_randomization
3017 = find_default_supports_disable_randomization
;
3018 dummy_target
.to_stratum
= dummy_stratum
;
3019 dummy_target
.to_has_all_memory
= return_zero
;
3020 dummy_target
.to_has_memory
= return_zero
;
3021 dummy_target
.to_has_stack
= return_zero
;
3022 dummy_target
.to_has_registers
= return_zero
;
3023 dummy_target
.to_has_execution
= return_zero_has_execution
;
3024 dummy_target
.to_magic
= OPS_MAGIC
;
3026 install_dummy_methods (&dummy_target
);
3031 target_close (struct target_ops
*targ
)
3033 gdb_assert (!target_is_pushed (targ
));
3035 if (targ
->to_xclose
!= NULL
)
3036 targ
->to_xclose (targ
);
3037 else if (targ
->to_close
!= NULL
)
3038 targ
->to_close (targ
);
3041 fprintf_unfiltered (gdb_stdlog
, "target_close ()\n");
3045 target_thread_alive (ptid_t ptid
)
3047 return current_target
.to_thread_alive (¤t_target
, ptid
);
3051 target_update_thread_list (void)
3053 current_target
.to_update_thread_list (¤t_target
);
3057 target_stop (ptid_t ptid
)
3061 warning (_("May not interrupt or stop the target, ignoring attempt"));
3065 (*current_target
.to_stop
) (¤t_target
, ptid
);
3068 /* See target/target.h. */
3071 target_stop_and_wait (ptid_t ptid
)
3073 struct target_waitstatus status
;
3074 int was_non_stop
= non_stop
;
3079 memset (&status
, 0, sizeof (status
));
3080 target_wait (ptid
, &status
, 0);
3082 non_stop
= was_non_stop
;
3085 /* See target/target.h. */
3088 target_continue_no_signal (ptid_t ptid
)
3090 target_resume (ptid
, 0, GDB_SIGNAL_0
);
3093 /* Concatenate ELEM to LIST, a comma separate list, and return the
3094 result. The LIST incoming argument is released. */
3097 str_comma_list_concat_elem (char *list
, const char *elem
)
3100 return xstrdup (elem
);
3102 return reconcat (list
, list
, ", ", elem
, (char *) NULL
);
3105 /* Helper for target_options_to_string. If OPT is present in
3106 TARGET_OPTIONS, append the OPT_STR (string version of OPT) in RET.
3107 Returns the new resulting string. OPT is removed from
3111 do_option (int *target_options
, char *ret
,
3112 int opt
, char *opt_str
)
3114 if ((*target_options
& opt
) != 0)
3116 ret
= str_comma_list_concat_elem (ret
, opt_str
);
3117 *target_options
&= ~opt
;
3124 target_options_to_string (int target_options
)
3128 #define DO_TARG_OPTION(OPT) \
3129 ret = do_option (&target_options, ret, OPT, #OPT)
3131 DO_TARG_OPTION (TARGET_WNOHANG
);
3133 if (target_options
!= 0)
3134 ret
= str_comma_list_concat_elem (ret
, "unknown???");
3142 debug_print_register (const char * func
,
3143 struct regcache
*regcache
, int regno
)
3145 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
3147 fprintf_unfiltered (gdb_stdlog
, "%s ", func
);
3148 if (regno
>= 0 && regno
< gdbarch_num_regs (gdbarch
)
3149 && gdbarch_register_name (gdbarch
, regno
) != NULL
3150 && gdbarch_register_name (gdbarch
, regno
)[0] != '\0')
3151 fprintf_unfiltered (gdb_stdlog
, "(%s)",
3152 gdbarch_register_name (gdbarch
, regno
));
3154 fprintf_unfiltered (gdb_stdlog
, "(%d)", regno
);
3155 if (regno
>= 0 && regno
< gdbarch_num_regs (gdbarch
))
3157 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
3158 int i
, size
= register_size (gdbarch
, regno
);
3159 gdb_byte buf
[MAX_REGISTER_SIZE
];
3161 regcache_raw_collect (regcache
, regno
, buf
);
3162 fprintf_unfiltered (gdb_stdlog
, " = ");
3163 for (i
= 0; i
< size
; i
++)
3165 fprintf_unfiltered (gdb_stdlog
, "%02x", buf
[i
]);
3167 if (size
<= sizeof (LONGEST
))
3169 ULONGEST val
= extract_unsigned_integer (buf
, size
, byte_order
);
3171 fprintf_unfiltered (gdb_stdlog
, " %s %s",
3172 core_addr_to_string_nz (val
), plongest (val
));
3175 fprintf_unfiltered (gdb_stdlog
, "\n");
3179 target_fetch_registers (struct regcache
*regcache
, int regno
)
3181 current_target
.to_fetch_registers (¤t_target
, regcache
, regno
);
3183 debug_print_register ("target_fetch_registers", regcache
, regno
);
3187 target_store_registers (struct regcache
*regcache
, int regno
)
3189 struct target_ops
*t
;
3191 if (!may_write_registers
)
3192 error (_("Writing to registers is not allowed (regno %d)"), regno
);
3194 current_target
.to_store_registers (¤t_target
, regcache
, regno
);
3197 debug_print_register ("target_store_registers", regcache
, regno
);
3202 target_core_of_thread (ptid_t ptid
)
3204 return current_target
.to_core_of_thread (¤t_target
, ptid
);
3208 simple_verify_memory (struct target_ops
*ops
,
3209 const gdb_byte
*data
, CORE_ADDR lma
, ULONGEST size
)
3211 LONGEST total_xfered
= 0;
3213 while (total_xfered
< size
)
3215 ULONGEST xfered_len
;
3216 enum target_xfer_status status
;
3218 ULONGEST howmuch
= min (sizeof (buf
), size
- total_xfered
);
3220 status
= target_xfer_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
3221 buf
, NULL
, lma
+ total_xfered
, howmuch
,
3223 if (status
== TARGET_XFER_OK
3224 && memcmp (data
+ total_xfered
, buf
, xfered_len
) == 0)
3226 total_xfered
+= xfered_len
;
3235 /* Default implementation of memory verification. */
3238 default_verify_memory (struct target_ops
*self
,
3239 const gdb_byte
*data
, CORE_ADDR memaddr
, ULONGEST size
)
3241 /* Start over from the top of the target stack. */
3242 return simple_verify_memory (current_target
.beneath
,
3243 data
, memaddr
, size
);
3247 target_verify_memory (const gdb_byte
*data
, CORE_ADDR memaddr
, ULONGEST size
)
3249 return current_target
.to_verify_memory (¤t_target
,
3250 data
, memaddr
, size
);
3253 /* The documentation for this function is in its prototype declaration in
3257 target_insert_mask_watchpoint (CORE_ADDR addr
, CORE_ADDR mask
, int rw
)
3259 return current_target
.to_insert_mask_watchpoint (¤t_target
,
3263 /* The documentation for this function is in its prototype declaration in
3267 target_remove_mask_watchpoint (CORE_ADDR addr
, CORE_ADDR mask
, int rw
)
3269 return current_target
.to_remove_mask_watchpoint (¤t_target
,
3273 /* The documentation for this function is in its prototype declaration
3277 target_masked_watch_num_registers (CORE_ADDR addr
, CORE_ADDR mask
)
3279 return current_target
.to_masked_watch_num_registers (¤t_target
,
3283 /* The documentation for this function is in its prototype declaration
3287 target_ranged_break_num_registers (void)
3289 return current_target
.to_ranged_break_num_registers (¤t_target
);
3294 struct btrace_target_info
*
3295 target_enable_btrace (ptid_t ptid
)
3297 return current_target
.to_enable_btrace (¤t_target
, ptid
);
3303 target_disable_btrace (struct btrace_target_info
*btinfo
)
3305 current_target
.to_disable_btrace (¤t_target
, btinfo
);
3311 target_teardown_btrace (struct btrace_target_info
*btinfo
)
3313 current_target
.to_teardown_btrace (¤t_target
, btinfo
);
3319 target_read_btrace (VEC (btrace_block_s
) **btrace
,
3320 struct btrace_target_info
*btinfo
,
3321 enum btrace_read_type type
)
3323 return current_target
.to_read_btrace (¤t_target
, btrace
, btinfo
, type
);
3329 target_stop_recording (void)
3331 current_target
.to_stop_recording (¤t_target
);
3337 target_save_record (const char *filename
)
3339 current_target
.to_save_record (¤t_target
, filename
);
3345 target_supports_delete_record (void)
3347 struct target_ops
*t
;
3349 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3350 if (t
->to_delete_record
!= delegate_delete_record
3351 && t
->to_delete_record
!= tdefault_delete_record
)
3360 target_delete_record (void)
3362 current_target
.to_delete_record (¤t_target
);
3368 target_record_is_replaying (void)
3370 return current_target
.to_record_is_replaying (¤t_target
);
3376 target_goto_record_begin (void)
3378 current_target
.to_goto_record_begin (¤t_target
);
3384 target_goto_record_end (void)
3386 current_target
.to_goto_record_end (¤t_target
);
3392 target_goto_record (ULONGEST insn
)
3394 current_target
.to_goto_record (¤t_target
, insn
);
3400 target_insn_history (int size
, int flags
)
3402 current_target
.to_insn_history (¤t_target
, size
, flags
);
3408 target_insn_history_from (ULONGEST from
, int size
, int flags
)
3410 current_target
.to_insn_history_from (¤t_target
, from
, size
, flags
);
3416 target_insn_history_range (ULONGEST begin
, ULONGEST end
, int flags
)
3418 current_target
.to_insn_history_range (¤t_target
, begin
, end
, flags
);
3424 target_call_history (int size
, int flags
)
3426 current_target
.to_call_history (¤t_target
, size
, flags
);
3432 target_call_history_from (ULONGEST begin
, int size
, int flags
)
3434 current_target
.to_call_history_from (¤t_target
, begin
, size
, flags
);
3440 target_call_history_range (ULONGEST begin
, ULONGEST end
, int flags
)
3442 current_target
.to_call_history_range (¤t_target
, begin
, end
, flags
);
3447 const struct frame_unwind
*
3448 target_get_unwinder (void)
3450 return current_target
.to_get_unwinder (¤t_target
);
3455 const struct frame_unwind
*
3456 target_get_tailcall_unwinder (void)
3458 return current_target
.to_get_tailcall_unwinder (¤t_target
);
3461 /* Default implementation of to_decr_pc_after_break. */
3464 default_target_decr_pc_after_break (struct target_ops
*ops
,
3465 struct gdbarch
*gdbarch
)
3467 return gdbarch_decr_pc_after_break (gdbarch
);
3473 target_decr_pc_after_break (struct gdbarch
*gdbarch
)
3475 return current_target
.to_decr_pc_after_break (¤t_target
, gdbarch
);
3481 target_prepare_to_generate_core (void)
3483 current_target
.to_prepare_to_generate_core (¤t_target
);
3489 target_done_generating_core (void)
3491 current_target
.to_done_generating_core (¤t_target
);
3495 setup_target_debug (void)
3497 memcpy (&debug_target
, ¤t_target
, sizeof debug_target
);
3499 init_debug_target (¤t_target
);
3503 static char targ_desc
[] =
3504 "Names of targets and files being debugged.\nShows the entire \
3505 stack of targets currently in use (including the exec-file,\n\
3506 core-file, and process, if any), as well as the symbol file name.";
3509 default_rcmd (struct target_ops
*self
, const char *command
,
3510 struct ui_file
*output
)
3512 error (_("\"monitor\" command not supported by this target."));
3516 do_monitor_command (char *cmd
,
3519 target_rcmd (cmd
, gdb_stdtarg
);
3522 /* Print the name of each layers of our target stack. */
3525 maintenance_print_target_stack (char *cmd
, int from_tty
)
3527 struct target_ops
*t
;
3529 printf_filtered (_("The current target stack is:\n"));
3531 for (t
= target_stack
; t
!= NULL
; t
= t
->beneath
)
3533 printf_filtered (" - %s (%s)\n", t
->to_shortname
, t
->to_longname
);
3537 /* Controls if targets can report that they can/are async. This is
3538 just for maintainers to use when debugging gdb. */
3539 int target_async_permitted
= 1;
3541 /* The set command writes to this variable. If the inferior is
3542 executing, target_async_permitted is *not* updated. */
3543 static int target_async_permitted_1
= 1;
3546 maint_set_target_async_command (char *args
, int from_tty
,
3547 struct cmd_list_element
*c
)
3549 if (have_live_inferiors ())
3551 target_async_permitted_1
= target_async_permitted
;
3552 error (_("Cannot change this setting while the inferior is running."));
3555 target_async_permitted
= target_async_permitted_1
;
3559 maint_show_target_async_command (struct ui_file
*file
, int from_tty
,
3560 struct cmd_list_element
*c
,
3563 fprintf_filtered (file
,
3564 _("Controlling the inferior in "
3565 "asynchronous mode is %s.\n"), value
);
3568 /* Temporary copies of permission settings. */
3570 static int may_write_registers_1
= 1;
3571 static int may_write_memory_1
= 1;
3572 static int may_insert_breakpoints_1
= 1;
3573 static int may_insert_tracepoints_1
= 1;
3574 static int may_insert_fast_tracepoints_1
= 1;
3575 static int may_stop_1
= 1;
3577 /* Make the user-set values match the real values again. */
3580 update_target_permissions (void)
3582 may_write_registers_1
= may_write_registers
;
3583 may_write_memory_1
= may_write_memory
;
3584 may_insert_breakpoints_1
= may_insert_breakpoints
;
3585 may_insert_tracepoints_1
= may_insert_tracepoints
;
3586 may_insert_fast_tracepoints_1
= may_insert_fast_tracepoints
;
3587 may_stop_1
= may_stop
;
3590 /* The one function handles (most of) the permission flags in the same
3594 set_target_permissions (char *args
, int from_tty
,
3595 struct cmd_list_element
*c
)
3597 if (target_has_execution
)
3599 update_target_permissions ();
3600 error (_("Cannot change this setting while the inferior is running."));
3603 /* Make the real values match the user-changed values. */
3604 may_write_registers
= may_write_registers_1
;
3605 may_insert_breakpoints
= may_insert_breakpoints_1
;
3606 may_insert_tracepoints
= may_insert_tracepoints_1
;
3607 may_insert_fast_tracepoints
= may_insert_fast_tracepoints_1
;
3608 may_stop
= may_stop_1
;
3609 update_observer_mode ();
3612 /* Set memory write permission independently of observer mode. */
3615 set_write_memory_permission (char *args
, int from_tty
,
3616 struct cmd_list_element
*c
)
3618 /* Make the real values match the user-changed values. */
3619 may_write_memory
= may_write_memory_1
;
3620 update_observer_mode ();
3625 initialize_targets (void)
3627 init_dummy_target ();
3628 push_target (&dummy_target
);
3630 add_info ("target", target_info
, targ_desc
);
3631 add_info ("files", target_info
, targ_desc
);
3633 add_setshow_zuinteger_cmd ("target", class_maintenance
, &targetdebug
, _("\
3634 Set target debugging."), _("\
3635 Show target debugging."), _("\
3636 When non-zero, target debugging is enabled. Higher numbers are more\n\
3640 &setdebuglist
, &showdebuglist
);
3642 add_setshow_boolean_cmd ("trust-readonly-sections", class_support
,
3643 &trust_readonly
, _("\
3644 Set mode for reading from readonly sections."), _("\
3645 Show mode for reading from readonly sections."), _("\
3646 When this mode is on, memory reads from readonly sections (such as .text)\n\
3647 will be read from the object file instead of from the target. This will\n\
3648 result in significant performance improvement for remote targets."),
3650 show_trust_readonly
,
3651 &setlist
, &showlist
);
3653 add_com ("monitor", class_obscure
, do_monitor_command
,
3654 _("Send a command to the remote monitor (remote targets only)."));
3656 add_cmd ("target-stack", class_maintenance
, maintenance_print_target_stack
,
3657 _("Print the name of each layer of the internal target stack."),
3658 &maintenanceprintlist
);
3660 add_setshow_boolean_cmd ("target-async", no_class
,
3661 &target_async_permitted_1
, _("\
3662 Set whether gdb controls the inferior in asynchronous mode."), _("\
3663 Show whether gdb controls the inferior in asynchronous mode."), _("\
3664 Tells gdb whether to control the inferior in asynchronous mode."),
3665 maint_set_target_async_command
,
3666 maint_show_target_async_command
,
3667 &maintenance_set_cmdlist
,
3668 &maintenance_show_cmdlist
);
3670 add_setshow_boolean_cmd ("may-write-registers", class_support
,
3671 &may_write_registers_1
, _("\
3672 Set permission to write into registers."), _("\
3673 Show permission to write into registers."), _("\
3674 When this permission is on, GDB may write into the target's registers.\n\
3675 Otherwise, any sort of write attempt will result in an error."),
3676 set_target_permissions
, NULL
,
3677 &setlist
, &showlist
);
3679 add_setshow_boolean_cmd ("may-write-memory", class_support
,
3680 &may_write_memory_1
, _("\
3681 Set permission to write into target memory."), _("\
3682 Show permission to write into target memory."), _("\
3683 When this permission is on, GDB may write into the target's memory.\n\
3684 Otherwise, any sort of write attempt will result in an error."),
3685 set_write_memory_permission
, NULL
,
3686 &setlist
, &showlist
);
3688 add_setshow_boolean_cmd ("may-insert-breakpoints", class_support
,
3689 &may_insert_breakpoints_1
, _("\
3690 Set permission to insert breakpoints in the target."), _("\
3691 Show permission to insert breakpoints in the target."), _("\
3692 When this permission is on, GDB may insert breakpoints in the program.\n\
3693 Otherwise, any sort of insertion attempt will result in an error."),
3694 set_target_permissions
, NULL
,
3695 &setlist
, &showlist
);
3697 add_setshow_boolean_cmd ("may-insert-tracepoints", class_support
,
3698 &may_insert_tracepoints_1
, _("\
3699 Set permission to insert tracepoints in the target."), _("\
3700 Show permission to insert tracepoints in the target."), _("\
3701 When this permission is on, GDB may insert tracepoints in the program.\n\
3702 Otherwise, any sort of insertion attempt will result in an error."),
3703 set_target_permissions
, NULL
,
3704 &setlist
, &showlist
);
3706 add_setshow_boolean_cmd ("may-insert-fast-tracepoints", class_support
,
3707 &may_insert_fast_tracepoints_1
, _("\
3708 Set permission to insert fast tracepoints in the target."), _("\
3709 Show permission to insert fast tracepoints in the target."), _("\
3710 When this permission is on, GDB may insert fast tracepoints.\n\
3711 Otherwise, any sort of insertion attempt will result in an error."),
3712 set_target_permissions
, NULL
,
3713 &setlist
, &showlist
);
3715 add_setshow_boolean_cmd ("may-interrupt", class_support
,
3717 Set permission to interrupt or signal the target."), _("\
3718 Show permission to interrupt or signal the target."), _("\
3719 When this permission is on, GDB may interrupt/stop the target's execution.\n\
3720 Otherwise, any attempt to interrupt or stop will be ignored."),
3721 set_target_permissions
, NULL
,
3722 &setlist
, &showlist
);
3724 add_setshow_boolean_cmd ("auto-connect-native-target", class_support
,
3725 &auto_connect_native_target
, _("\
3726 Set whether GDB may automatically connect to the native target."), _("\
3727 Show whether GDB may automatically connect to the native target."), _("\
3728 When on, and GDB is not connected to a target yet, GDB\n\
3729 attempts \"run\" and other commands with the native target."),
3730 NULL
, show_auto_connect_native_target
,
3731 &setlist
, &showlist
);