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
);
435 /* Possible terminal states. */
439 /* The inferior's terminal settings are in effect. */
440 terminal_is_inferior
= 0,
442 /* Some of our terminal settings are in effect, enough to get
444 terminal_is_ours_for_output
= 1,
446 /* Our terminal settings are in effect, for output and input. */
450 static enum terminal_state terminal_state
;
455 target_terminal_init (void)
457 (*current_target
.to_terminal_init
) (¤t_target
);
459 terminal_state
= terminal_is_ours
;
465 target_terminal_is_inferior (void)
467 return (terminal_state
== terminal_is_inferior
);
473 target_terminal_inferior (void)
475 /* A background resume (``run&'') should leave GDB in control of the
476 terminal. Use target_can_async_p, not target_is_async_p, since at
477 this point the target is not async yet. However, if sync_execution
478 is not set, we know it will become async prior to resume. */
479 if (target_can_async_p () && !sync_execution
)
482 if (terminal_state
== terminal_is_inferior
)
485 /* If GDB is resuming the inferior in the foreground, install
486 inferior's terminal modes. */
487 (*current_target
.to_terminal_inferior
) (¤t_target
);
488 terminal_state
= terminal_is_inferior
;
494 target_terminal_ours (void)
496 if (terminal_state
== terminal_is_ours
)
499 (*current_target
.to_terminal_ours
) (¤t_target
);
500 terminal_state
= terminal_is_ours
;
506 target_terminal_ours_for_output (void)
508 if (terminal_state
!= terminal_is_inferior
)
510 (*current_target
.to_terminal_ours_for_output
) (¤t_target
);
511 terminal_state
= terminal_is_ours_for_output
;
517 target_supports_terminal_ours (void)
519 struct target_ops
*t
;
521 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
523 if (t
->to_terminal_ours
!= delegate_terminal_ours
524 && t
->to_terminal_ours
!= tdefault_terminal_ours
)
534 error (_("You can't do that when your target is `%s'"),
535 current_target
.to_shortname
);
541 error (_("You can't do that without a process to debug."));
545 default_terminal_info (struct target_ops
*self
, const char *args
, int from_tty
)
547 printf_unfiltered (_("No saved terminal information.\n"));
550 /* A default implementation for the to_get_ada_task_ptid target method.
552 This function builds the PTID by using both LWP and TID as part of
553 the PTID lwp and tid elements. The pid used is the pid of the
557 default_get_ada_task_ptid (struct target_ops
*self
, long lwp
, long tid
)
559 return ptid_build (ptid_get_pid (inferior_ptid
), lwp
, tid
);
562 static enum exec_direction_kind
563 default_execution_direction (struct target_ops
*self
)
565 if (!target_can_execute_reverse
)
567 else if (!target_can_async_p ())
570 gdb_assert_not_reached ("\
571 to_execution_direction must be implemented for reverse async");
574 /* Go through the target stack from top to bottom, copying over zero
575 entries in current_target, then filling in still empty entries. In
576 effect, we are doing class inheritance through the pushed target
579 NOTE: cagney/2003-10-17: The problem with this inheritance, as it
580 is currently implemented, is that it discards any knowledge of
581 which target an inherited method originally belonged to.
582 Consequently, new new target methods should instead explicitly and
583 locally search the target stack for the target that can handle the
587 update_current_target (void)
589 struct target_ops
*t
;
591 /* First, reset current's contents. */
592 memset (¤t_target
, 0, sizeof (current_target
));
594 /* Install the delegators. */
595 install_delegators (¤t_target
);
597 current_target
.to_stratum
= target_stack
->to_stratum
;
599 #define INHERIT(FIELD, TARGET) \
600 if (!current_target.FIELD) \
601 current_target.FIELD = (TARGET)->FIELD
603 /* Do not add any new INHERITs here. Instead, use the delegation
604 mechanism provided by make-target-delegates. */
605 for (t
= target_stack
; t
; t
= t
->beneath
)
607 INHERIT (to_shortname
, t
);
608 INHERIT (to_longname
, t
);
609 INHERIT (to_attach_no_wait
, t
);
610 INHERIT (to_have_steppable_watchpoint
, t
);
611 INHERIT (to_have_continuable_watchpoint
, t
);
612 INHERIT (to_has_thread_control
, t
);
616 /* Finally, position the target-stack beneath the squashed
617 "current_target". That way code looking for a non-inherited
618 target method can quickly and simply find it. */
619 current_target
.beneath
= target_stack
;
622 setup_target_debug ();
625 /* Push a new target type into the stack of the existing target accessors,
626 possibly superseding some of the existing accessors.
628 Rather than allow an empty stack, we always have the dummy target at
629 the bottom stratum, so we can call the function vectors without
633 push_target (struct target_ops
*t
)
635 struct target_ops
**cur
;
637 /* Check magic number. If wrong, it probably means someone changed
638 the struct definition, but not all the places that initialize one. */
639 if (t
->to_magic
!= OPS_MAGIC
)
641 fprintf_unfiltered (gdb_stderr
,
642 "Magic number of %s target struct wrong\n",
644 internal_error (__FILE__
, __LINE__
,
645 _("failed internal consistency check"));
648 /* Find the proper stratum to install this target in. */
649 for (cur
= &target_stack
; (*cur
) != NULL
; cur
= &(*cur
)->beneath
)
651 if ((int) (t
->to_stratum
) >= (int) (*cur
)->to_stratum
)
655 /* If there's already targets at this stratum, remove them. */
656 /* FIXME: cagney/2003-10-15: I think this should be popping all
657 targets to CUR, and not just those at this stratum level. */
658 while ((*cur
) != NULL
&& t
->to_stratum
== (*cur
)->to_stratum
)
660 /* There's already something at this stratum level. Close it,
661 and un-hook it from the stack. */
662 struct target_ops
*tmp
= (*cur
);
664 (*cur
) = (*cur
)->beneath
;
669 /* We have removed all targets in our stratum, now add the new one. */
673 update_current_target ();
676 /* Remove a target_ops vector from the stack, wherever it may be.
677 Return how many times it was removed (0 or 1). */
680 unpush_target (struct target_ops
*t
)
682 struct target_ops
**cur
;
683 struct target_ops
*tmp
;
685 if (t
->to_stratum
== dummy_stratum
)
686 internal_error (__FILE__
, __LINE__
,
687 _("Attempt to unpush the dummy target"));
689 /* Look for the specified target. Note that we assume that a target
690 can only occur once in the target stack. */
692 for (cur
= &target_stack
; (*cur
) != NULL
; cur
= &(*cur
)->beneath
)
698 /* If we don't find target_ops, quit. Only open targets should be
703 /* Unchain the target. */
705 (*cur
) = (*cur
)->beneath
;
708 update_current_target ();
710 /* Finally close the target. Note we do this after unchaining, so
711 any target method calls from within the target_close
712 implementation don't end up in T anymore. */
719 pop_all_targets_above (enum strata above_stratum
)
721 while ((int) (current_target
.to_stratum
) > (int) above_stratum
)
723 if (!unpush_target (target_stack
))
725 fprintf_unfiltered (gdb_stderr
,
726 "pop_all_targets couldn't find target %s\n",
727 target_stack
->to_shortname
);
728 internal_error (__FILE__
, __LINE__
,
729 _("failed internal consistency check"));
736 pop_all_targets (void)
738 pop_all_targets_above (dummy_stratum
);
741 /* Return 1 if T is now pushed in the target stack. Return 0 otherwise. */
744 target_is_pushed (struct target_ops
*t
)
746 struct target_ops
*cur
;
748 /* Check magic number. If wrong, it probably means someone changed
749 the struct definition, but not all the places that initialize one. */
750 if (t
->to_magic
!= OPS_MAGIC
)
752 fprintf_unfiltered (gdb_stderr
,
753 "Magic number of %s target struct wrong\n",
755 internal_error (__FILE__
, __LINE__
,
756 _("failed internal consistency check"));
759 for (cur
= target_stack
; cur
!= NULL
; cur
= cur
->beneath
)
766 /* Default implementation of to_get_thread_local_address. */
769 generic_tls_error (void)
771 throw_error (TLS_GENERIC_ERROR
,
772 _("Cannot find thread-local variables on this target"));
775 /* Using the objfile specified in OBJFILE, find the address for the
776 current thread's thread-local storage with offset OFFSET. */
778 target_translate_tls_address (struct objfile
*objfile
, CORE_ADDR offset
)
780 volatile CORE_ADDR addr
= 0;
781 struct target_ops
*target
= ¤t_target
;
783 if (gdbarch_fetch_tls_load_module_address_p (target_gdbarch ()))
785 ptid_t ptid
= inferior_ptid
;
786 volatile struct gdb_exception ex
;
788 TRY_CATCH (ex
, RETURN_MASK_ALL
)
792 /* Fetch the load module address for this objfile. */
793 lm_addr
= gdbarch_fetch_tls_load_module_address (target_gdbarch (),
796 addr
= target
->to_get_thread_local_address (target
, ptid
,
799 /* If an error occurred, print TLS related messages here. Otherwise,
800 throw the error to some higher catcher. */
803 int objfile_is_library
= (objfile
->flags
& OBJF_SHARED
);
807 case TLS_NO_LIBRARY_SUPPORT_ERROR
:
808 error (_("Cannot find thread-local variables "
809 "in this thread library."));
811 case TLS_LOAD_MODULE_NOT_FOUND_ERROR
:
812 if (objfile_is_library
)
813 error (_("Cannot find shared library `%s' in dynamic"
814 " linker's load module list"), objfile_name (objfile
));
816 error (_("Cannot find executable file `%s' in dynamic"
817 " linker's load module list"), objfile_name (objfile
));
819 case TLS_NOT_ALLOCATED_YET_ERROR
:
820 if (objfile_is_library
)
821 error (_("The inferior has not yet allocated storage for"
822 " thread-local variables in\n"
823 "the shared library `%s'\n"
825 objfile_name (objfile
), target_pid_to_str (ptid
));
827 error (_("The inferior has not yet allocated storage for"
828 " thread-local variables in\n"
829 "the executable `%s'\n"
831 objfile_name (objfile
), target_pid_to_str (ptid
));
833 case TLS_GENERIC_ERROR
:
834 if (objfile_is_library
)
835 error (_("Cannot find thread-local storage for %s, "
836 "shared library %s:\n%s"),
837 target_pid_to_str (ptid
),
838 objfile_name (objfile
), ex
.message
);
840 error (_("Cannot find thread-local storage for %s, "
841 "executable file %s:\n%s"),
842 target_pid_to_str (ptid
),
843 objfile_name (objfile
), ex
.message
);
846 throw_exception (ex
);
851 /* It wouldn't be wrong here to try a gdbarch method, too; finding
852 TLS is an ABI-specific thing. But we don't do that yet. */
854 error (_("Cannot find thread-local variables on this target"));
860 target_xfer_status_to_string (enum target_xfer_status status
)
862 #define CASE(X) case X: return #X
865 CASE(TARGET_XFER_E_IO
);
866 CASE(TARGET_XFER_UNAVAILABLE
);
875 #define MIN(A, B) (((A) <= (B)) ? (A) : (B))
877 /* target_read_string -- read a null terminated string, up to LEN bytes,
878 from MEMADDR in target. Set *ERRNOP to the errno code, or 0 if successful.
879 Set *STRING to a pointer to malloc'd memory containing the data; the caller
880 is responsible for freeing it. Return the number of bytes successfully
884 target_read_string (CORE_ADDR memaddr
, char **string
, int len
, int *errnop
)
890 int buffer_allocated
;
892 unsigned int nbytes_read
= 0;
896 /* Small for testing. */
897 buffer_allocated
= 4;
898 buffer
= xmalloc (buffer_allocated
);
903 tlen
= MIN (len
, 4 - (memaddr
& 3));
904 offset
= memaddr
& 3;
906 errcode
= target_read_memory (memaddr
& ~3, buf
, sizeof buf
);
909 /* The transfer request might have crossed the boundary to an
910 unallocated region of memory. Retry the transfer, requesting
914 errcode
= target_read_memory (memaddr
, buf
, 1);
919 if (bufptr
- buffer
+ tlen
> buffer_allocated
)
923 bytes
= bufptr
- buffer
;
924 buffer_allocated
*= 2;
925 buffer
= xrealloc (buffer
, buffer_allocated
);
926 bufptr
= buffer
+ bytes
;
929 for (i
= 0; i
< tlen
; i
++)
931 *bufptr
++ = buf
[i
+ offset
];
932 if (buf
[i
+ offset
] == '\000')
934 nbytes_read
+= i
+ 1;
950 struct target_section_table
*
951 target_get_section_table (struct target_ops
*target
)
953 return (*target
->to_get_section_table
) (target
);
956 /* Find a section containing ADDR. */
958 struct target_section
*
959 target_section_by_addr (struct target_ops
*target
, CORE_ADDR addr
)
961 struct target_section_table
*table
= target_get_section_table (target
);
962 struct target_section
*secp
;
967 for (secp
= table
->sections
; secp
< table
->sections_end
; secp
++)
969 if (addr
>= secp
->addr
&& addr
< secp
->endaddr
)
976 /* Helper for the memory xfer routines. Checks the attributes of the
977 memory region of MEMADDR against the read or write being attempted.
978 If the access is permitted returns true, otherwise returns false.
979 REGION_P is an optional output parameter. If not-NULL, it is
980 filled with a pointer to the memory region of MEMADDR. REG_LEN
981 returns LEN trimmed to the end of the region. This is how much the
982 caller can continue requesting, if the access is permitted. A
983 single xfer request must not straddle memory region boundaries. */
986 memory_xfer_check_region (gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
987 ULONGEST memaddr
, ULONGEST len
, ULONGEST
*reg_len
,
988 struct mem_region
**region_p
)
990 struct mem_region
*region
;
992 region
= lookup_mem_region (memaddr
);
994 if (region_p
!= NULL
)
997 switch (region
->attrib
.mode
)
1000 if (writebuf
!= NULL
)
1005 if (readbuf
!= NULL
)
1010 /* We only support writing to flash during "load" for now. */
1011 if (writebuf
!= NULL
)
1012 error (_("Writing to flash memory forbidden in this context"));
1019 /* region->hi == 0 means there's no upper bound. */
1020 if (memaddr
+ len
< region
->hi
|| region
->hi
== 0)
1023 *reg_len
= region
->hi
- memaddr
;
1028 /* Read memory from more than one valid target. A core file, for
1029 instance, could have some of memory but delegate other bits to
1030 the target below it. So, we must manually try all targets. */
1032 static enum target_xfer_status
1033 raw_memory_xfer_partial (struct target_ops
*ops
, gdb_byte
*readbuf
,
1034 const gdb_byte
*writebuf
, ULONGEST memaddr
, LONGEST len
,
1035 ULONGEST
*xfered_len
)
1037 enum target_xfer_status res
;
1041 res
= ops
->to_xfer_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1042 readbuf
, writebuf
, memaddr
, len
,
1044 if (res
== TARGET_XFER_OK
)
1047 /* Stop if the target reports that the memory is not available. */
1048 if (res
== TARGET_XFER_UNAVAILABLE
)
1051 /* We want to continue past core files to executables, but not
1052 past a running target's memory. */
1053 if (ops
->to_has_all_memory (ops
))
1058 while (ops
!= NULL
);
1060 /* The cache works at the raw memory level. Make sure the cache
1061 gets updated with raw contents no matter what kind of memory
1062 object was originally being written. Note we do write-through
1063 first, so that if it fails, we don't write to the cache contents
1064 that never made it to the target. */
1065 if (writebuf
!= NULL
1066 && !ptid_equal (inferior_ptid
, null_ptid
)
1067 && target_dcache_init_p ()
1068 && (stack_cache_enabled_p () || code_cache_enabled_p ()))
1070 DCACHE
*dcache
= target_dcache_get ();
1072 /* Note that writing to an area of memory which wasn't present
1073 in the cache doesn't cause it to be loaded in. */
1074 dcache_update (dcache
, res
, memaddr
, writebuf
, *xfered_len
);
1080 /* Perform a partial memory transfer.
1081 For docs see target.h, to_xfer_partial. */
1083 static enum target_xfer_status
1084 memory_xfer_partial_1 (struct target_ops
*ops
, enum target_object object
,
1085 gdb_byte
*readbuf
, const gdb_byte
*writebuf
, ULONGEST memaddr
,
1086 ULONGEST len
, ULONGEST
*xfered_len
)
1088 enum target_xfer_status res
;
1090 struct mem_region
*region
;
1091 struct inferior
*inf
;
1093 /* For accesses to unmapped overlay sections, read directly from
1094 files. Must do this first, as MEMADDR may need adjustment. */
1095 if (readbuf
!= NULL
&& overlay_debugging
)
1097 struct obj_section
*section
= find_pc_overlay (memaddr
);
1099 if (pc_in_unmapped_range (memaddr
, section
))
1101 struct target_section_table
*table
1102 = target_get_section_table (ops
);
1103 const char *section_name
= section
->the_bfd_section
->name
;
1105 memaddr
= overlay_mapped_address (memaddr
, section
);
1106 return section_table_xfer_memory_partial (readbuf
, writebuf
,
1107 memaddr
, len
, xfered_len
,
1109 table
->sections_end
,
1114 /* Try the executable files, if "trust-readonly-sections" is set. */
1115 if (readbuf
!= NULL
&& trust_readonly
)
1117 struct target_section
*secp
;
1118 struct target_section_table
*table
;
1120 secp
= target_section_by_addr (ops
, memaddr
);
1122 && (bfd_get_section_flags (secp
->the_bfd_section
->owner
,
1123 secp
->the_bfd_section
)
1126 table
= target_get_section_table (ops
);
1127 return section_table_xfer_memory_partial (readbuf
, writebuf
,
1128 memaddr
, len
, xfered_len
,
1130 table
->sections_end
,
1135 /* Try GDB's internal data cache. */
1137 if (!memory_xfer_check_region (readbuf
, writebuf
, memaddr
, len
, ®_len
,
1139 return TARGET_XFER_E_IO
;
1141 if (!ptid_equal (inferior_ptid
, null_ptid
))
1142 inf
= find_inferior_pid (ptid_get_pid (inferior_ptid
));
1148 /* The dcache reads whole cache lines; that doesn't play well
1149 with reading from a trace buffer, because reading outside of
1150 the collected memory range fails. */
1151 && get_traceframe_number () == -1
1152 && (region
->attrib
.cache
1153 || (stack_cache_enabled_p () && object
== TARGET_OBJECT_STACK_MEMORY
)
1154 || (code_cache_enabled_p () && object
== TARGET_OBJECT_CODE_MEMORY
)))
1156 DCACHE
*dcache
= target_dcache_get_or_init ();
1158 return dcache_read_memory_partial (ops
, dcache
, memaddr
, readbuf
,
1159 reg_len
, xfered_len
);
1162 /* If none of those methods found the memory we wanted, fall back
1163 to a target partial transfer. Normally a single call to
1164 to_xfer_partial is enough; if it doesn't recognize an object
1165 it will call the to_xfer_partial of the next target down.
1166 But for memory this won't do. Memory is the only target
1167 object which can be read from more than one valid target.
1168 A core file, for instance, could have some of memory but
1169 delegate other bits to the target below it. So, we must
1170 manually try all targets. */
1172 res
= raw_memory_xfer_partial (ops
, readbuf
, writebuf
, memaddr
, reg_len
,
1175 /* If we still haven't got anything, return the last error. We
1180 /* Perform a partial memory transfer. For docs see target.h,
1183 static enum target_xfer_status
1184 memory_xfer_partial (struct target_ops
*ops
, enum target_object object
,
1185 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1186 ULONGEST memaddr
, ULONGEST len
, ULONGEST
*xfered_len
)
1188 enum target_xfer_status res
;
1190 /* Zero length requests are ok and require no work. */
1192 return TARGET_XFER_EOF
;
1194 /* Fill in READBUF with breakpoint shadows, or WRITEBUF with
1195 breakpoint insns, thus hiding out from higher layers whether
1196 there are software breakpoints inserted in the code stream. */
1197 if (readbuf
!= NULL
)
1199 res
= memory_xfer_partial_1 (ops
, object
, readbuf
, NULL
, memaddr
, len
,
1202 if (res
== TARGET_XFER_OK
&& !show_memory_breakpoints
)
1203 breakpoint_xfer_memory (readbuf
, NULL
, NULL
, memaddr
, *xfered_len
);
1208 struct cleanup
*old_chain
;
1210 /* A large write request is likely to be partially satisfied
1211 by memory_xfer_partial_1. We will continually malloc
1212 and free a copy of the entire write request for breakpoint
1213 shadow handling even though we only end up writing a small
1214 subset of it. Cap writes to 4KB to mitigate this. */
1215 len
= min (4096, len
);
1217 buf
= xmalloc (len
);
1218 old_chain
= make_cleanup (xfree
, buf
);
1219 memcpy (buf
, writebuf
, len
);
1221 breakpoint_xfer_memory (NULL
, buf
, writebuf
, memaddr
, len
);
1222 res
= memory_xfer_partial_1 (ops
, object
, NULL
, buf
, memaddr
, len
,
1225 do_cleanups (old_chain
);
1232 restore_show_memory_breakpoints (void *arg
)
1234 show_memory_breakpoints
= (uintptr_t) arg
;
1238 make_show_memory_breakpoints_cleanup (int show
)
1240 int current
= show_memory_breakpoints
;
1242 show_memory_breakpoints
= show
;
1243 return make_cleanup (restore_show_memory_breakpoints
,
1244 (void *) (uintptr_t) current
);
1247 /* For docs see target.h, to_xfer_partial. */
1249 enum target_xfer_status
1250 target_xfer_partial (struct target_ops
*ops
,
1251 enum target_object object
, const char *annex
,
1252 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1253 ULONGEST offset
, ULONGEST len
,
1254 ULONGEST
*xfered_len
)
1256 enum target_xfer_status retval
;
1258 gdb_assert (ops
->to_xfer_partial
!= NULL
);
1260 /* Transfer is done when LEN is zero. */
1262 return TARGET_XFER_EOF
;
1264 if (writebuf
&& !may_write_memory
)
1265 error (_("Writing to memory is not allowed (addr %s, len %s)"),
1266 core_addr_to_string_nz (offset
), plongest (len
));
1270 /* If this is a memory transfer, let the memory-specific code
1271 have a look at it instead. Memory transfers are more
1273 if (object
== TARGET_OBJECT_MEMORY
|| object
== TARGET_OBJECT_STACK_MEMORY
1274 || object
== TARGET_OBJECT_CODE_MEMORY
)
1275 retval
= memory_xfer_partial (ops
, object
, readbuf
,
1276 writebuf
, offset
, len
, xfered_len
);
1277 else if (object
== TARGET_OBJECT_RAW_MEMORY
)
1279 /* Skip/avoid accessing the target if the memory region
1280 attributes block the access. Check this here instead of in
1281 raw_memory_xfer_partial as otherwise we'd end up checking
1282 this twice in the case of the memory_xfer_partial path is
1283 taken; once before checking the dcache, and another in the
1284 tail call to raw_memory_xfer_partial. */
1285 if (!memory_xfer_check_region (readbuf
, writebuf
, offset
, len
, &len
,
1287 return TARGET_XFER_E_IO
;
1289 /* Request the normal memory object from other layers. */
1290 retval
= raw_memory_xfer_partial (ops
, readbuf
, writebuf
, offset
, len
,
1294 retval
= ops
->to_xfer_partial (ops
, object
, annex
, readbuf
,
1295 writebuf
, offset
, len
, xfered_len
);
1299 const unsigned char *myaddr
= NULL
;
1301 fprintf_unfiltered (gdb_stdlog
,
1302 "%s:target_xfer_partial "
1303 "(%d, %s, %s, %s, %s, %s) = %d, %s",
1306 (annex
? annex
: "(null)"),
1307 host_address_to_string (readbuf
),
1308 host_address_to_string (writebuf
),
1309 core_addr_to_string_nz (offset
),
1310 pulongest (len
), retval
,
1311 pulongest (*xfered_len
));
1317 if (retval
== TARGET_XFER_OK
&& myaddr
!= NULL
)
1321 fputs_unfiltered (", bytes =", gdb_stdlog
);
1322 for (i
= 0; i
< *xfered_len
; i
++)
1324 if ((((intptr_t) &(myaddr
[i
])) & 0xf) == 0)
1326 if (targetdebug
< 2 && i
> 0)
1328 fprintf_unfiltered (gdb_stdlog
, " ...");
1331 fprintf_unfiltered (gdb_stdlog
, "\n");
1334 fprintf_unfiltered (gdb_stdlog
, " %02x", myaddr
[i
] & 0xff);
1338 fputc_unfiltered ('\n', gdb_stdlog
);
1341 /* Check implementations of to_xfer_partial update *XFERED_LEN
1342 properly. Do assertion after printing debug messages, so that we
1343 can find more clues on assertion failure from debugging messages. */
1344 if (retval
== TARGET_XFER_OK
|| retval
== TARGET_XFER_UNAVAILABLE
)
1345 gdb_assert (*xfered_len
> 0);
1350 /* Read LEN bytes of target memory at address MEMADDR, placing the
1351 results in GDB's memory at MYADDR. Returns either 0 for success or
1352 TARGET_XFER_E_IO if any error occurs.
1354 If an error occurs, no guarantee is made about the contents of the data at
1355 MYADDR. In particular, the caller should not depend upon partial reads
1356 filling the buffer with good data. There is no way for the caller to know
1357 how much good data might have been transfered anyway. Callers that can
1358 deal with partial reads should call target_read (which will retry until
1359 it makes no progress, and then return how much was transferred). */
1362 target_read_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1364 /* Dispatch to the topmost target, not the flattened current_target.
1365 Memory accesses check target->to_has_(all_)memory, and the
1366 flattened target doesn't inherit those. */
1367 if (target_read (current_target
.beneath
, TARGET_OBJECT_MEMORY
, NULL
,
1368 myaddr
, memaddr
, len
) == len
)
1371 return TARGET_XFER_E_IO
;
1374 /* See target/target.h. */
1377 target_read_uint32 (CORE_ADDR memaddr
, uint32_t *result
)
1382 r
= target_read_memory (memaddr
, buf
, sizeof buf
);
1385 *result
= extract_unsigned_integer (buf
, sizeof buf
,
1386 gdbarch_byte_order (target_gdbarch ()));
1390 /* Like target_read_memory, but specify explicitly that this is a read
1391 from the target's raw memory. That is, this read bypasses the
1392 dcache, breakpoint shadowing, etc. */
1395 target_read_raw_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1397 /* See comment in target_read_memory about why the request starts at
1398 current_target.beneath. */
1399 if (target_read (current_target
.beneath
, TARGET_OBJECT_RAW_MEMORY
, NULL
,
1400 myaddr
, memaddr
, len
) == len
)
1403 return TARGET_XFER_E_IO
;
1406 /* Like target_read_memory, but specify explicitly that this is a read from
1407 the target's stack. This may trigger different cache behavior. */
1410 target_read_stack (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1412 /* See comment in target_read_memory about why the request starts at
1413 current_target.beneath. */
1414 if (target_read (current_target
.beneath
, TARGET_OBJECT_STACK_MEMORY
, NULL
,
1415 myaddr
, memaddr
, len
) == len
)
1418 return TARGET_XFER_E_IO
;
1421 /* Like target_read_memory, but specify explicitly that this is a read from
1422 the target's code. This may trigger different cache behavior. */
1425 target_read_code (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1427 /* See comment in target_read_memory about why the request starts at
1428 current_target.beneath. */
1429 if (target_read (current_target
.beneath
, TARGET_OBJECT_CODE_MEMORY
, NULL
,
1430 myaddr
, memaddr
, len
) == len
)
1433 return TARGET_XFER_E_IO
;
1436 /* Write LEN bytes from MYADDR to target memory at address MEMADDR.
1437 Returns either 0 for success or TARGET_XFER_E_IO if any
1438 error occurs. If an error occurs, no guarantee is made about how
1439 much data got written. Callers that can deal with partial writes
1440 should call target_write. */
1443 target_write_memory (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ssize_t len
)
1445 /* See comment in target_read_memory about why the request starts at
1446 current_target.beneath. */
1447 if (target_write (current_target
.beneath
, TARGET_OBJECT_MEMORY
, NULL
,
1448 myaddr
, memaddr
, len
) == len
)
1451 return TARGET_XFER_E_IO
;
1454 /* Write LEN bytes from MYADDR to target raw memory at address
1455 MEMADDR. Returns either 0 for success or TARGET_XFER_E_IO
1456 if any error occurs. If an error occurs, no guarantee is made
1457 about how much data got written. Callers that can deal with
1458 partial writes should call target_write. */
1461 target_write_raw_memory (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ssize_t len
)
1463 /* See comment in target_read_memory about why the request starts at
1464 current_target.beneath. */
1465 if (target_write (current_target
.beneath
, TARGET_OBJECT_RAW_MEMORY
, NULL
,
1466 myaddr
, memaddr
, len
) == len
)
1469 return TARGET_XFER_E_IO
;
1472 /* Fetch the target's memory map. */
1475 target_memory_map (void)
1477 VEC(mem_region_s
) *result
;
1478 struct mem_region
*last_one
, *this_one
;
1480 struct target_ops
*t
;
1482 result
= current_target
.to_memory_map (¤t_target
);
1486 qsort (VEC_address (mem_region_s
, result
),
1487 VEC_length (mem_region_s
, result
),
1488 sizeof (struct mem_region
), mem_region_cmp
);
1490 /* Check that regions do not overlap. Simultaneously assign
1491 a numbering for the "mem" commands to use to refer to
1494 for (ix
= 0; VEC_iterate (mem_region_s
, result
, ix
, this_one
); ix
++)
1496 this_one
->number
= ix
;
1498 if (last_one
&& last_one
->hi
> this_one
->lo
)
1500 warning (_("Overlapping regions in memory map: ignoring"));
1501 VEC_free (mem_region_s
, result
);
1504 last_one
= this_one
;
1511 target_flash_erase (ULONGEST address
, LONGEST length
)
1513 current_target
.to_flash_erase (¤t_target
, address
, length
);
1517 target_flash_done (void)
1519 current_target
.to_flash_done (¤t_target
);
1523 show_trust_readonly (struct ui_file
*file
, int from_tty
,
1524 struct cmd_list_element
*c
, const char *value
)
1526 fprintf_filtered (file
,
1527 _("Mode for reading from readonly sections is %s.\n"),
1531 /* Target vector read/write partial wrapper functions. */
1533 static enum target_xfer_status
1534 target_read_partial (struct target_ops
*ops
,
1535 enum target_object object
,
1536 const char *annex
, gdb_byte
*buf
,
1537 ULONGEST offset
, ULONGEST len
,
1538 ULONGEST
*xfered_len
)
1540 return target_xfer_partial (ops
, object
, annex
, buf
, NULL
, offset
, len
,
1544 static enum target_xfer_status
1545 target_write_partial (struct target_ops
*ops
,
1546 enum target_object object
,
1547 const char *annex
, const gdb_byte
*buf
,
1548 ULONGEST offset
, LONGEST len
, ULONGEST
*xfered_len
)
1550 return target_xfer_partial (ops
, object
, annex
, NULL
, buf
, offset
, len
,
1554 /* Wrappers to perform the full transfer. */
1556 /* For docs on target_read see target.h. */
1559 target_read (struct target_ops
*ops
,
1560 enum target_object object
,
1561 const char *annex
, gdb_byte
*buf
,
1562 ULONGEST offset
, LONGEST len
)
1566 while (xfered
< len
)
1568 ULONGEST xfered_len
;
1569 enum target_xfer_status status
;
1571 status
= target_read_partial (ops
, object
, annex
,
1572 (gdb_byte
*) buf
+ xfered
,
1573 offset
+ xfered
, len
- xfered
,
1576 /* Call an observer, notifying them of the xfer progress? */
1577 if (status
== TARGET_XFER_EOF
)
1579 else if (status
== TARGET_XFER_OK
)
1581 xfered
+= xfered_len
;
1591 /* Assuming that the entire [begin, end) range of memory cannot be
1592 read, try to read whatever subrange is possible to read.
1594 The function returns, in RESULT, either zero or one memory block.
1595 If there's a readable subrange at the beginning, it is completely
1596 read and returned. Any further readable subrange will not be read.
1597 Otherwise, if there's a readable subrange at the end, it will be
1598 completely read and returned. Any readable subranges before it
1599 (obviously, not starting at the beginning), will be ignored. In
1600 other cases -- either no readable subrange, or readable subrange(s)
1601 that is neither at the beginning, or end, nothing is returned.
1603 The purpose of this function is to handle a read across a boundary
1604 of accessible memory in a case when memory map is not available.
1605 The above restrictions are fine for this case, but will give
1606 incorrect results if the memory is 'patchy'. However, supporting
1607 'patchy' memory would require trying to read every single byte,
1608 and it seems unacceptable solution. Explicit memory map is
1609 recommended for this case -- and target_read_memory_robust will
1610 take care of reading multiple ranges then. */
1613 read_whatever_is_readable (struct target_ops
*ops
,
1614 ULONGEST begin
, ULONGEST end
,
1615 VEC(memory_read_result_s
) **result
)
1617 gdb_byte
*buf
= xmalloc (end
- begin
);
1618 ULONGEST current_begin
= begin
;
1619 ULONGEST current_end
= end
;
1621 memory_read_result_s r
;
1622 ULONGEST xfered_len
;
1624 /* If we previously failed to read 1 byte, nothing can be done here. */
1625 if (end
- begin
<= 1)
1631 /* Check that either first or the last byte is readable, and give up
1632 if not. This heuristic is meant to permit reading accessible memory
1633 at the boundary of accessible region. */
1634 if (target_read_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1635 buf
, begin
, 1, &xfered_len
) == TARGET_XFER_OK
)
1640 else if (target_read_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1641 buf
+ (end
-begin
) - 1, end
- 1, 1,
1642 &xfered_len
) == TARGET_XFER_OK
)
1653 /* Loop invariant is that the [current_begin, current_end) was previously
1654 found to be not readable as a whole.
1656 Note loop condition -- if the range has 1 byte, we can't divide the range
1657 so there's no point trying further. */
1658 while (current_end
- current_begin
> 1)
1660 ULONGEST first_half_begin
, first_half_end
;
1661 ULONGEST second_half_begin
, second_half_end
;
1663 ULONGEST middle
= current_begin
+ (current_end
- current_begin
)/2;
1667 first_half_begin
= current_begin
;
1668 first_half_end
= middle
;
1669 second_half_begin
= middle
;
1670 second_half_end
= current_end
;
1674 first_half_begin
= middle
;
1675 first_half_end
= current_end
;
1676 second_half_begin
= current_begin
;
1677 second_half_end
= middle
;
1680 xfer
= target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1681 buf
+ (first_half_begin
- begin
),
1683 first_half_end
- first_half_begin
);
1685 if (xfer
== first_half_end
- first_half_begin
)
1687 /* This half reads up fine. So, the error must be in the
1689 current_begin
= second_half_begin
;
1690 current_end
= second_half_end
;
1694 /* This half is not readable. Because we've tried one byte, we
1695 know some part of this half if actually redable. Go to the next
1696 iteration to divide again and try to read.
1698 We don't handle the other half, because this function only tries
1699 to read a single readable subrange. */
1700 current_begin
= first_half_begin
;
1701 current_end
= first_half_end
;
1707 /* The [begin, current_begin) range has been read. */
1709 r
.end
= current_begin
;
1714 /* The [current_end, end) range has been read. */
1715 LONGEST rlen
= end
- current_end
;
1717 r
.data
= xmalloc (rlen
);
1718 memcpy (r
.data
, buf
+ current_end
- begin
, rlen
);
1719 r
.begin
= current_end
;
1723 VEC_safe_push(memory_read_result_s
, (*result
), &r
);
1727 free_memory_read_result_vector (void *x
)
1729 VEC(memory_read_result_s
) *v
= x
;
1730 memory_read_result_s
*current
;
1733 for (ix
= 0; VEC_iterate (memory_read_result_s
, v
, ix
, current
); ++ix
)
1735 xfree (current
->data
);
1737 VEC_free (memory_read_result_s
, v
);
1740 VEC(memory_read_result_s
) *
1741 read_memory_robust (struct target_ops
*ops
, ULONGEST offset
, LONGEST len
)
1743 VEC(memory_read_result_s
) *result
= 0;
1746 while (xfered
< len
)
1748 struct mem_region
*region
= lookup_mem_region (offset
+ xfered
);
1751 /* If there is no explicit region, a fake one should be created. */
1752 gdb_assert (region
);
1754 if (region
->hi
== 0)
1755 rlen
= len
- xfered
;
1757 rlen
= region
->hi
- offset
;
1759 if (region
->attrib
.mode
== MEM_NONE
|| region
->attrib
.mode
== MEM_WO
)
1761 /* Cannot read this region. Note that we can end up here only
1762 if the region is explicitly marked inaccessible, or
1763 'inaccessible-by-default' is in effect. */
1768 LONGEST to_read
= min (len
- xfered
, rlen
);
1769 gdb_byte
*buffer
= (gdb_byte
*)xmalloc (to_read
);
1771 LONGEST xfer
= target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1772 (gdb_byte
*) buffer
,
1773 offset
+ xfered
, to_read
);
1774 /* Call an observer, notifying them of the xfer progress? */
1777 /* Got an error reading full chunk. See if maybe we can read
1780 read_whatever_is_readable (ops
, offset
+ xfered
,
1781 offset
+ xfered
+ to_read
, &result
);
1786 struct memory_read_result r
;
1788 r
.begin
= offset
+ xfered
;
1789 r
.end
= r
.begin
+ xfer
;
1790 VEC_safe_push (memory_read_result_s
, result
, &r
);
1800 /* An alternative to target_write with progress callbacks. */
1803 target_write_with_progress (struct target_ops
*ops
,
1804 enum target_object object
,
1805 const char *annex
, const gdb_byte
*buf
,
1806 ULONGEST offset
, LONGEST len
,
1807 void (*progress
) (ULONGEST
, void *), void *baton
)
1811 /* Give the progress callback a chance to set up. */
1813 (*progress
) (0, baton
);
1815 while (xfered
< len
)
1817 ULONGEST xfered_len
;
1818 enum target_xfer_status status
;
1820 status
= target_write_partial (ops
, object
, annex
,
1821 (gdb_byte
*) buf
+ xfered
,
1822 offset
+ xfered
, len
- xfered
,
1825 if (status
!= TARGET_XFER_OK
)
1826 return status
== TARGET_XFER_EOF
? xfered
: -1;
1829 (*progress
) (xfered_len
, baton
);
1831 xfered
+= xfered_len
;
1837 /* For docs on target_write see target.h. */
1840 target_write (struct target_ops
*ops
,
1841 enum target_object object
,
1842 const char *annex
, const gdb_byte
*buf
,
1843 ULONGEST offset
, LONGEST len
)
1845 return target_write_with_progress (ops
, object
, annex
, buf
, offset
, len
,
1849 /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return
1850 the size of the transferred data. PADDING additional bytes are
1851 available in *BUF_P. This is a helper function for
1852 target_read_alloc; see the declaration of that function for more
1856 target_read_alloc_1 (struct target_ops
*ops
, enum target_object object
,
1857 const char *annex
, gdb_byte
**buf_p
, int padding
)
1859 size_t buf_alloc
, buf_pos
;
1862 /* This function does not have a length parameter; it reads the
1863 entire OBJECT). Also, it doesn't support objects fetched partly
1864 from one target and partly from another (in a different stratum,
1865 e.g. a core file and an executable). Both reasons make it
1866 unsuitable for reading memory. */
1867 gdb_assert (object
!= TARGET_OBJECT_MEMORY
);
1869 /* Start by reading up to 4K at a time. The target will throttle
1870 this number down if necessary. */
1872 buf
= xmalloc (buf_alloc
);
1876 ULONGEST xfered_len
;
1877 enum target_xfer_status status
;
1879 status
= target_read_partial (ops
, object
, annex
, &buf
[buf_pos
],
1880 buf_pos
, buf_alloc
- buf_pos
- padding
,
1883 if (status
== TARGET_XFER_EOF
)
1885 /* Read all there was. */
1892 else if (status
!= TARGET_XFER_OK
)
1894 /* An error occurred. */
1896 return TARGET_XFER_E_IO
;
1899 buf_pos
+= xfered_len
;
1901 /* If the buffer is filling up, expand it. */
1902 if (buf_alloc
< buf_pos
* 2)
1905 buf
= xrealloc (buf
, buf_alloc
);
1912 /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return
1913 the size of the transferred data. See the declaration in "target.h"
1914 function for more information about the return value. */
1917 target_read_alloc (struct target_ops
*ops
, enum target_object object
,
1918 const char *annex
, gdb_byte
**buf_p
)
1920 return target_read_alloc_1 (ops
, object
, annex
, buf_p
, 0);
1923 /* Read OBJECT/ANNEX using OPS. The result is NUL-terminated and
1924 returned as a string, allocated using xmalloc. If an error occurs
1925 or the transfer is unsupported, NULL is returned. Empty objects
1926 are returned as allocated but empty strings. A warning is issued
1927 if the result contains any embedded NUL bytes. */
1930 target_read_stralloc (struct target_ops
*ops
, enum target_object object
,
1935 LONGEST i
, transferred
;
1937 transferred
= target_read_alloc_1 (ops
, object
, annex
, &buffer
, 1);
1938 bufstr
= (char *) buffer
;
1940 if (transferred
< 0)
1943 if (transferred
== 0)
1944 return xstrdup ("");
1946 bufstr
[transferred
] = 0;
1948 /* Check for embedded NUL bytes; but allow trailing NULs. */
1949 for (i
= strlen (bufstr
); i
< transferred
; i
++)
1952 warning (_("target object %d, annex %s, "
1953 "contained unexpected null characters"),
1954 (int) object
, annex
? annex
: "(none)");
1961 /* Memory transfer methods. */
1964 get_target_memory (struct target_ops
*ops
, CORE_ADDR addr
, gdb_byte
*buf
,
1967 /* This method is used to read from an alternate, non-current
1968 target. This read must bypass the overlay support (as symbols
1969 don't match this target), and GDB's internal cache (wrong cache
1970 for this target). */
1971 if (target_read (ops
, TARGET_OBJECT_RAW_MEMORY
, NULL
, buf
, addr
, len
)
1973 memory_error (TARGET_XFER_E_IO
, addr
);
1977 get_target_memory_unsigned (struct target_ops
*ops
, CORE_ADDR addr
,
1978 int len
, enum bfd_endian byte_order
)
1980 gdb_byte buf
[sizeof (ULONGEST
)];
1982 gdb_assert (len
<= sizeof (buf
));
1983 get_target_memory (ops
, addr
, buf
, len
);
1984 return extract_unsigned_integer (buf
, len
, byte_order
);
1990 target_insert_breakpoint (struct gdbarch
*gdbarch
,
1991 struct bp_target_info
*bp_tgt
)
1993 if (!may_insert_breakpoints
)
1995 warning (_("May not insert breakpoints"));
1999 return current_target
.to_insert_breakpoint (¤t_target
,
2006 target_remove_breakpoint (struct gdbarch
*gdbarch
,
2007 struct bp_target_info
*bp_tgt
)
2009 /* This is kind of a weird case to handle, but the permission might
2010 have been changed after breakpoints were inserted - in which case
2011 we should just take the user literally and assume that any
2012 breakpoints should be left in place. */
2013 if (!may_insert_breakpoints
)
2015 warning (_("May not remove breakpoints"));
2019 return current_target
.to_remove_breakpoint (¤t_target
,
2024 target_info (char *args
, int from_tty
)
2026 struct target_ops
*t
;
2027 int has_all_mem
= 0;
2029 if (symfile_objfile
!= NULL
)
2030 printf_unfiltered (_("Symbols from \"%s\".\n"),
2031 objfile_name (symfile_objfile
));
2033 for (t
= target_stack
; t
!= NULL
; t
= t
->beneath
)
2035 if (!(*t
->to_has_memory
) (t
))
2038 if ((int) (t
->to_stratum
) <= (int) dummy_stratum
)
2041 printf_unfiltered (_("\tWhile running this, "
2042 "GDB does not access memory from...\n"));
2043 printf_unfiltered ("%s:\n", t
->to_longname
);
2044 (t
->to_files_info
) (t
);
2045 has_all_mem
= (*t
->to_has_all_memory
) (t
);
2049 /* This function is called before any new inferior is created, e.g.
2050 by running a program, attaching, or connecting to a target.
2051 It cleans up any state from previous invocations which might
2052 change between runs. This is a subset of what target_preopen
2053 resets (things which might change between targets). */
2056 target_pre_inferior (int from_tty
)
2058 /* Clear out solib state. Otherwise the solib state of the previous
2059 inferior might have survived and is entirely wrong for the new
2060 target. This has been observed on GNU/Linux using glibc 2.3. How
2072 Cannot access memory at address 0xdeadbeef
2075 /* In some OSs, the shared library list is the same/global/shared
2076 across inferiors. If code is shared between processes, so are
2077 memory regions and features. */
2078 if (!gdbarch_has_global_solist (target_gdbarch ()))
2080 no_shared_libraries (NULL
, from_tty
);
2082 invalidate_target_mem_regions ();
2084 target_clear_description ();
2087 agent_capability_invalidate ();
2090 /* Callback for iterate_over_inferiors. Gets rid of the given
2094 dispose_inferior (struct inferior
*inf
, void *args
)
2096 struct thread_info
*thread
;
2098 thread
= any_thread_of_process (inf
->pid
);
2101 switch_to_thread (thread
->ptid
);
2103 /* Core inferiors actually should be detached, not killed. */
2104 if (target_has_execution
)
2107 target_detach (NULL
, 0);
2113 /* This is to be called by the open routine before it does
2117 target_preopen (int from_tty
)
2121 if (have_inferiors ())
2124 || !have_live_inferiors ()
2125 || query (_("A program is being debugged already. Kill it? ")))
2126 iterate_over_inferiors (dispose_inferior
, NULL
);
2128 error (_("Program not killed."));
2131 /* Calling target_kill may remove the target from the stack. But if
2132 it doesn't (which seems like a win for UDI), remove it now. */
2133 /* Leave the exec target, though. The user may be switching from a
2134 live process to a core of the same program. */
2135 pop_all_targets_above (file_stratum
);
2137 target_pre_inferior (from_tty
);
2140 /* Detach a target after doing deferred register stores. */
2143 target_detach (const char *args
, int from_tty
)
2145 struct target_ops
* t
;
2147 if (gdbarch_has_global_breakpoints (target_gdbarch ()))
2148 /* Don't remove global breakpoints here. They're removed on
2149 disconnection from the target. */
2152 /* If we're in breakpoints-always-inserted mode, have to remove
2153 them before detaching. */
2154 remove_breakpoints_pid (ptid_get_pid (inferior_ptid
));
2156 prepare_for_detach ();
2158 current_target
.to_detach (¤t_target
, args
, from_tty
);
2162 target_disconnect (const char *args
, int from_tty
)
2164 /* If we're in breakpoints-always-inserted mode or if breakpoints
2165 are global across processes, we have to remove them before
2167 remove_breakpoints ();
2169 current_target
.to_disconnect (¤t_target
, args
, from_tty
);
2173 target_wait (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
2175 return (current_target
.to_wait
) (¤t_target
, ptid
, status
, options
);
2179 target_pid_to_str (ptid_t ptid
)
2181 return (*current_target
.to_pid_to_str
) (¤t_target
, ptid
);
2185 target_thread_name (struct thread_info
*info
)
2187 return current_target
.to_thread_name (¤t_target
, info
);
2191 target_resume (ptid_t ptid
, int step
, enum gdb_signal signal
)
2193 struct target_ops
*t
;
2195 target_dcache_invalidate ();
2197 current_target
.to_resume (¤t_target
, ptid
, step
, signal
);
2199 registers_changed_ptid (ptid
);
2200 /* We only set the internal executing state here. The user/frontend
2201 running state is set at a higher level. */
2202 set_executing (ptid
, 1);
2203 clear_inline_frame_state (ptid
);
2207 target_pass_signals (int numsigs
, unsigned char *pass_signals
)
2209 (*current_target
.to_pass_signals
) (¤t_target
, numsigs
, pass_signals
);
2213 target_program_signals (int numsigs
, unsigned char *program_signals
)
2215 (*current_target
.to_program_signals
) (¤t_target
,
2216 numsigs
, program_signals
);
2220 default_follow_fork (struct target_ops
*self
, int follow_child
,
2223 /* Some target returned a fork event, but did not know how to follow it. */
2224 internal_error (__FILE__
, __LINE__
,
2225 _("could not find a target to follow fork"));
2228 /* Look through the list of possible targets for a target that can
2232 target_follow_fork (int follow_child
, int detach_fork
)
2234 return current_target
.to_follow_fork (¤t_target
,
2235 follow_child
, detach_fork
);
2239 default_mourn_inferior (struct target_ops
*self
)
2241 internal_error (__FILE__
, __LINE__
,
2242 _("could not find a target to follow mourn inferior"));
2246 target_mourn_inferior (void)
2248 current_target
.to_mourn_inferior (¤t_target
);
2250 /* We no longer need to keep handles on any of the object files.
2251 Make sure to release them to avoid unnecessarily locking any
2252 of them while we're not actually debugging. */
2253 bfd_cache_close_all ();
2256 /* Look for a target which can describe architectural features, starting
2257 from TARGET. If we find one, return its description. */
2259 const struct target_desc
*
2260 target_read_description (struct target_ops
*target
)
2262 return target
->to_read_description (target
);
2265 /* This implements a basic search of memory, reading target memory and
2266 performing the search here (as opposed to performing the search in on the
2267 target side with, for example, gdbserver). */
2270 simple_search_memory (struct target_ops
*ops
,
2271 CORE_ADDR start_addr
, ULONGEST search_space_len
,
2272 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2273 CORE_ADDR
*found_addrp
)
2275 /* NOTE: also defined in find.c testcase. */
2276 #define SEARCH_CHUNK_SIZE 16000
2277 const unsigned chunk_size
= SEARCH_CHUNK_SIZE
;
2278 /* Buffer to hold memory contents for searching. */
2279 gdb_byte
*search_buf
;
2280 unsigned search_buf_size
;
2281 struct cleanup
*old_cleanups
;
2283 search_buf_size
= chunk_size
+ pattern_len
- 1;
2285 /* No point in trying to allocate a buffer larger than the search space. */
2286 if (search_space_len
< search_buf_size
)
2287 search_buf_size
= search_space_len
;
2289 search_buf
= malloc (search_buf_size
);
2290 if (search_buf
== NULL
)
2291 error (_("Unable to allocate memory to perform the search."));
2292 old_cleanups
= make_cleanup (free_current_contents
, &search_buf
);
2294 /* Prime the search buffer. */
2296 if (target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2297 search_buf
, start_addr
, search_buf_size
) != search_buf_size
)
2299 warning (_("Unable to access %s bytes of target "
2300 "memory at %s, halting search."),
2301 pulongest (search_buf_size
), hex_string (start_addr
));
2302 do_cleanups (old_cleanups
);
2306 /* Perform the search.
2308 The loop is kept simple by allocating [N + pattern-length - 1] bytes.
2309 When we've scanned N bytes we copy the trailing bytes to the start and
2310 read in another N bytes. */
2312 while (search_space_len
>= pattern_len
)
2314 gdb_byte
*found_ptr
;
2315 unsigned nr_search_bytes
= min (search_space_len
, search_buf_size
);
2317 found_ptr
= memmem (search_buf
, nr_search_bytes
,
2318 pattern
, pattern_len
);
2320 if (found_ptr
!= NULL
)
2322 CORE_ADDR found_addr
= start_addr
+ (found_ptr
- search_buf
);
2324 *found_addrp
= found_addr
;
2325 do_cleanups (old_cleanups
);
2329 /* Not found in this chunk, skip to next chunk. */
2331 /* Don't let search_space_len wrap here, it's unsigned. */
2332 if (search_space_len
>= chunk_size
)
2333 search_space_len
-= chunk_size
;
2335 search_space_len
= 0;
2337 if (search_space_len
>= pattern_len
)
2339 unsigned keep_len
= search_buf_size
- chunk_size
;
2340 CORE_ADDR read_addr
= start_addr
+ chunk_size
+ keep_len
;
2343 /* Copy the trailing part of the previous iteration to the front
2344 of the buffer for the next iteration. */
2345 gdb_assert (keep_len
== pattern_len
- 1);
2346 memcpy (search_buf
, search_buf
+ chunk_size
, keep_len
);
2348 nr_to_read
= min (search_space_len
- keep_len
, chunk_size
);
2350 if (target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2351 search_buf
+ keep_len
, read_addr
,
2352 nr_to_read
) != nr_to_read
)
2354 warning (_("Unable to access %s bytes of target "
2355 "memory at %s, halting search."),
2356 plongest (nr_to_read
),
2357 hex_string (read_addr
));
2358 do_cleanups (old_cleanups
);
2362 start_addr
+= chunk_size
;
2368 do_cleanups (old_cleanups
);
2372 /* Default implementation of memory-searching. */
2375 default_search_memory (struct target_ops
*self
,
2376 CORE_ADDR start_addr
, ULONGEST search_space_len
,
2377 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2378 CORE_ADDR
*found_addrp
)
2380 /* Start over from the top of the target stack. */
2381 return simple_search_memory (current_target
.beneath
,
2382 start_addr
, search_space_len
,
2383 pattern
, pattern_len
, found_addrp
);
2386 /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the
2387 sequence of bytes in PATTERN with length PATTERN_LEN.
2389 The result is 1 if found, 0 if not found, and -1 if there was an error
2390 requiring halting of the search (e.g. memory read error).
2391 If the pattern is found the address is recorded in FOUND_ADDRP. */
2394 target_search_memory (CORE_ADDR start_addr
, ULONGEST search_space_len
,
2395 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2396 CORE_ADDR
*found_addrp
)
2398 return current_target
.to_search_memory (¤t_target
, start_addr
,
2400 pattern
, pattern_len
, found_addrp
);
2403 /* Look through the currently pushed targets. If none of them will
2404 be able to restart the currently running process, issue an error
2408 target_require_runnable (void)
2410 struct target_ops
*t
;
2412 for (t
= target_stack
; t
!= NULL
; t
= t
->beneath
)
2414 /* If this target knows how to create a new program, then
2415 assume we will still be able to after killing the current
2416 one. Either killing and mourning will not pop T, or else
2417 find_default_run_target will find it again. */
2418 if (t
->to_create_inferior
!= NULL
)
2421 /* Do not worry about targets at certain strata that can not
2422 create inferiors. Assume they will be pushed again if
2423 necessary, and continue to the process_stratum. */
2424 if (t
->to_stratum
== thread_stratum
2425 || t
->to_stratum
== record_stratum
2426 || t
->to_stratum
== arch_stratum
)
2429 error (_("The \"%s\" target does not support \"run\". "
2430 "Try \"help target\" or \"continue\"."),
2434 /* This function is only called if the target is running. In that
2435 case there should have been a process_stratum target and it
2436 should either know how to create inferiors, or not... */
2437 internal_error (__FILE__
, __LINE__
, _("No targets found"));
2440 /* Whether GDB is allowed to fall back to the default run target for
2441 "run", "attach", etc. when no target is connected yet. */
2442 static int auto_connect_native_target
= 1;
2445 show_auto_connect_native_target (struct ui_file
*file
, int from_tty
,
2446 struct cmd_list_element
*c
, const char *value
)
2448 fprintf_filtered (file
,
2449 _("Whether GDB may automatically connect to the "
2450 "native target is %s.\n"),
2454 /* Look through the list of possible targets for a target that can
2455 execute a run or attach command without any other data. This is
2456 used to locate the default process stratum.
2458 If DO_MESG is not NULL, the result is always valid (error() is
2459 called for errors); else, return NULL on error. */
2461 static struct target_ops
*
2462 find_default_run_target (char *do_mesg
)
2464 struct target_ops
*runable
= NULL
;
2466 if (auto_connect_native_target
)
2468 struct target_ops
*t
;
2472 for (i
= 0; VEC_iterate (target_ops_p
, target_structs
, i
, t
); ++i
)
2474 if (t
->to_can_run
!= delegate_can_run
&& target_can_run (t
))
2485 if (runable
== NULL
)
2488 error (_("Don't know how to %s. Try \"help target\"."), do_mesg
);
2499 find_attach_target (void)
2501 struct target_ops
*t
;
2503 /* If a target on the current stack can attach, use it. */
2504 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2506 if (t
->to_attach
!= NULL
)
2510 /* Otherwise, use the default run target for attaching. */
2512 t
= find_default_run_target ("attach");
2520 find_run_target (void)
2522 struct target_ops
*t
;
2524 /* If a target on the current stack can attach, use it. */
2525 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2527 if (t
->to_create_inferior
!= NULL
)
2531 /* Otherwise, use the default run target. */
2533 t
= find_default_run_target ("run");
2538 /* Implement the "info proc" command. */
2541 target_info_proc (const char *args
, enum info_proc_what what
)
2543 struct target_ops
*t
;
2545 /* If we're already connected to something that can get us OS
2546 related data, use it. Otherwise, try using the native
2548 if (current_target
.to_stratum
>= process_stratum
)
2549 t
= current_target
.beneath
;
2551 t
= find_default_run_target (NULL
);
2553 for (; t
!= NULL
; t
= t
->beneath
)
2555 if (t
->to_info_proc
!= NULL
)
2557 t
->to_info_proc (t
, args
, what
);
2560 fprintf_unfiltered (gdb_stdlog
,
2561 "target_info_proc (\"%s\", %d)\n", args
, what
);
2571 find_default_supports_disable_randomization (struct target_ops
*self
)
2573 struct target_ops
*t
;
2575 t
= find_default_run_target (NULL
);
2576 if (t
&& t
->to_supports_disable_randomization
)
2577 return (t
->to_supports_disable_randomization
) (t
);
2582 target_supports_disable_randomization (void)
2584 struct target_ops
*t
;
2586 for (t
= ¤t_target
; t
!= NULL
; t
= t
->beneath
)
2587 if (t
->to_supports_disable_randomization
)
2588 return t
->to_supports_disable_randomization (t
);
2594 target_get_osdata (const char *type
)
2596 struct target_ops
*t
;
2598 /* If we're already connected to something that can get us OS
2599 related data, use it. Otherwise, try using the native
2601 if (current_target
.to_stratum
>= process_stratum
)
2602 t
= current_target
.beneath
;
2604 t
= find_default_run_target ("get OS data");
2609 return target_read_stralloc (t
, TARGET_OBJECT_OSDATA
, type
);
2612 static struct address_space
*
2613 default_thread_address_space (struct target_ops
*self
, ptid_t ptid
)
2615 struct inferior
*inf
;
2617 /* Fall-back to the "main" address space of the inferior. */
2618 inf
= find_inferior_pid (ptid_get_pid (ptid
));
2620 if (inf
== NULL
|| inf
->aspace
== NULL
)
2621 internal_error (__FILE__
, __LINE__
,
2622 _("Can't determine the current "
2623 "address space of thread %s\n"),
2624 target_pid_to_str (ptid
));
2629 /* Determine the current address space of thread PTID. */
2631 struct address_space
*
2632 target_thread_address_space (ptid_t ptid
)
2634 struct address_space
*aspace
;
2636 aspace
= current_target
.to_thread_address_space (¤t_target
, ptid
);
2637 gdb_assert (aspace
!= NULL
);
2643 /* Target file operations. */
2645 static struct target_ops
*
2646 default_fileio_target (void)
2648 /* If we're already connected to something that can perform
2649 file I/O, use it. Otherwise, try using the native target. */
2650 if (current_target
.to_stratum
>= process_stratum
)
2651 return current_target
.beneath
;
2653 return find_default_run_target ("file I/O");
2656 /* Open FILENAME on the target, using FLAGS and MODE. Return a
2657 target file descriptor, or -1 if an error occurs (and set
2660 target_fileio_open (const char *filename
, int flags
, int mode
,
2663 struct target_ops
*t
;
2665 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
2667 if (t
->to_fileio_open
!= NULL
)
2669 int fd
= t
->to_fileio_open (t
, filename
, flags
, mode
, target_errno
);
2672 fprintf_unfiltered (gdb_stdlog
,
2673 "target_fileio_open (%s,0x%x,0%o) = %d (%d)\n",
2674 filename
, flags
, mode
,
2675 fd
, fd
!= -1 ? 0 : *target_errno
);
2680 *target_errno
= FILEIO_ENOSYS
;
2684 /* Write up to LEN bytes from WRITE_BUF to FD on the target.
2685 Return the number of bytes written, or -1 if an error occurs
2686 (and set *TARGET_ERRNO). */
2688 target_fileio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
2689 ULONGEST offset
, int *target_errno
)
2691 struct target_ops
*t
;
2693 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
2695 if (t
->to_fileio_pwrite
!= NULL
)
2697 int ret
= t
->to_fileio_pwrite (t
, fd
, write_buf
, len
, offset
,
2701 fprintf_unfiltered (gdb_stdlog
,
2702 "target_fileio_pwrite (%d,...,%d,%s) "
2704 fd
, len
, pulongest (offset
),
2705 ret
, ret
!= -1 ? 0 : *target_errno
);
2710 *target_errno
= FILEIO_ENOSYS
;
2714 /* Read up to LEN bytes FD on the target into READ_BUF.
2715 Return the number of bytes read, or -1 if an error occurs
2716 (and set *TARGET_ERRNO). */
2718 target_fileio_pread (int fd
, gdb_byte
*read_buf
, int len
,
2719 ULONGEST offset
, int *target_errno
)
2721 struct target_ops
*t
;
2723 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
2725 if (t
->to_fileio_pread
!= NULL
)
2727 int ret
= t
->to_fileio_pread (t
, fd
, read_buf
, len
, offset
,
2731 fprintf_unfiltered (gdb_stdlog
,
2732 "target_fileio_pread (%d,...,%d,%s) "
2734 fd
, len
, pulongest (offset
),
2735 ret
, ret
!= -1 ? 0 : *target_errno
);
2740 *target_errno
= FILEIO_ENOSYS
;
2744 /* Close FD on the target. Return 0, or -1 if an error occurs
2745 (and set *TARGET_ERRNO). */
2747 target_fileio_close (int fd
, int *target_errno
)
2749 struct target_ops
*t
;
2751 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
2753 if (t
->to_fileio_close
!= NULL
)
2755 int ret
= t
->to_fileio_close (t
, fd
, target_errno
);
2758 fprintf_unfiltered (gdb_stdlog
,
2759 "target_fileio_close (%d) = %d (%d)\n",
2760 fd
, ret
, ret
!= -1 ? 0 : *target_errno
);
2765 *target_errno
= FILEIO_ENOSYS
;
2769 /* Unlink FILENAME on the target. Return 0, or -1 if an error
2770 occurs (and set *TARGET_ERRNO). */
2772 target_fileio_unlink (const char *filename
, int *target_errno
)
2774 struct target_ops
*t
;
2776 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
2778 if (t
->to_fileio_unlink
!= NULL
)
2780 int ret
= t
->to_fileio_unlink (t
, filename
, target_errno
);
2783 fprintf_unfiltered (gdb_stdlog
,
2784 "target_fileio_unlink (%s) = %d (%d)\n",
2785 filename
, ret
, ret
!= -1 ? 0 : *target_errno
);
2790 *target_errno
= FILEIO_ENOSYS
;
2794 /* Read value of symbolic link FILENAME on the target. Return a
2795 null-terminated string allocated via xmalloc, or NULL if an error
2796 occurs (and set *TARGET_ERRNO). */
2798 target_fileio_readlink (const char *filename
, int *target_errno
)
2800 struct target_ops
*t
;
2802 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
2804 if (t
->to_fileio_readlink
!= NULL
)
2806 char *ret
= t
->to_fileio_readlink (t
, filename
, target_errno
);
2809 fprintf_unfiltered (gdb_stdlog
,
2810 "target_fileio_readlink (%s) = %s (%d)\n",
2811 filename
, ret
? ret
: "(nil)",
2812 ret
? 0 : *target_errno
);
2817 *target_errno
= FILEIO_ENOSYS
;
2822 target_fileio_close_cleanup (void *opaque
)
2824 int fd
= *(int *) opaque
;
2827 target_fileio_close (fd
, &target_errno
);
2830 /* Read target file FILENAME. Store the result in *BUF_P and
2831 return the size of the transferred data. PADDING additional bytes are
2832 available in *BUF_P. This is a helper function for
2833 target_fileio_read_alloc; see the declaration of that function for more
2837 target_fileio_read_alloc_1 (const char *filename
,
2838 gdb_byte
**buf_p
, int padding
)
2840 struct cleanup
*close_cleanup
;
2841 size_t buf_alloc
, buf_pos
;
2847 fd
= target_fileio_open (filename
, FILEIO_O_RDONLY
, 0700, &target_errno
);
2851 close_cleanup
= make_cleanup (target_fileio_close_cleanup
, &fd
);
2853 /* Start by reading up to 4K at a time. The target will throttle
2854 this number down if necessary. */
2856 buf
= xmalloc (buf_alloc
);
2860 n
= target_fileio_pread (fd
, &buf
[buf_pos
],
2861 buf_alloc
- buf_pos
- padding
, buf_pos
,
2865 /* An error occurred. */
2866 do_cleanups (close_cleanup
);
2872 /* Read all there was. */
2873 do_cleanups (close_cleanup
);
2883 /* If the buffer is filling up, expand it. */
2884 if (buf_alloc
< buf_pos
* 2)
2887 buf
= xrealloc (buf
, buf_alloc
);
2894 /* Read target file FILENAME. Store the result in *BUF_P and return
2895 the size of the transferred data. See the declaration in "target.h"
2896 function for more information about the return value. */
2899 target_fileio_read_alloc (const char *filename
, gdb_byte
**buf_p
)
2901 return target_fileio_read_alloc_1 (filename
, buf_p
, 0);
2904 /* Read target file FILENAME. The result is NUL-terminated and
2905 returned as a string, allocated using xmalloc. If an error occurs
2906 or the transfer is unsupported, NULL is returned. Empty objects
2907 are returned as allocated but empty strings. A warning is issued
2908 if the result contains any embedded NUL bytes. */
2911 target_fileio_read_stralloc (const char *filename
)
2915 LONGEST i
, transferred
;
2917 transferred
= target_fileio_read_alloc_1 (filename
, &buffer
, 1);
2918 bufstr
= (char *) buffer
;
2920 if (transferred
< 0)
2923 if (transferred
== 0)
2924 return xstrdup ("");
2926 bufstr
[transferred
] = 0;
2928 /* Check for embedded NUL bytes; but allow trailing NULs. */
2929 for (i
= strlen (bufstr
); i
< transferred
; i
++)
2932 warning (_("target file %s "
2933 "contained unexpected null characters"),
2943 default_region_ok_for_hw_watchpoint (struct target_ops
*self
,
2944 CORE_ADDR addr
, int len
)
2946 return (len
<= gdbarch_ptr_bit (target_gdbarch ()) / TARGET_CHAR_BIT
);
2950 default_watchpoint_addr_within_range (struct target_ops
*target
,
2952 CORE_ADDR start
, int length
)
2954 return addr
>= start
&& addr
< start
+ length
;
2957 static struct gdbarch
*
2958 default_thread_architecture (struct target_ops
*ops
, ptid_t ptid
)
2960 return target_gdbarch ();
2964 return_zero (struct target_ops
*ignore
)
2970 return_zero_has_execution (struct target_ops
*ignore
, ptid_t ignore2
)
2976 * Find the next target down the stack from the specified target.
2980 find_target_beneath (struct target_ops
*t
)
2988 find_target_at (enum strata stratum
)
2990 struct target_ops
*t
;
2992 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2993 if (t
->to_stratum
== stratum
)
3000 /* The inferior process has died. Long live the inferior! */
3003 generic_mourn_inferior (void)
3007 ptid
= inferior_ptid
;
3008 inferior_ptid
= null_ptid
;
3010 /* Mark breakpoints uninserted in case something tries to delete a
3011 breakpoint while we delete the inferior's threads (which would
3012 fail, since the inferior is long gone). */
3013 mark_breakpoints_out ();
3015 if (!ptid_equal (ptid
, null_ptid
))
3017 int pid
= ptid_get_pid (ptid
);
3018 exit_inferior (pid
);
3021 /* Note this wipes step-resume breakpoints, so needs to be done
3022 after exit_inferior, which ends up referencing the step-resume
3023 breakpoints through clear_thread_inferior_resources. */
3024 breakpoint_init_inferior (inf_exited
);
3026 registers_changed ();
3028 reopen_exec_file ();
3029 reinit_frame_cache ();
3031 if (deprecated_detach_hook
)
3032 deprecated_detach_hook ();
3035 /* Convert a normal process ID to a string. Returns the string in a
3039 normal_pid_to_str (ptid_t ptid
)
3041 static char buf
[32];
3043 xsnprintf (buf
, sizeof buf
, "process %d", ptid_get_pid (ptid
));
3048 default_pid_to_str (struct target_ops
*ops
, ptid_t ptid
)
3050 return normal_pid_to_str (ptid
);
3053 /* Error-catcher for target_find_memory_regions. */
3055 dummy_find_memory_regions (struct target_ops
*self
,
3056 find_memory_region_ftype ignore1
, void *ignore2
)
3058 error (_("Command not implemented for this target."));
3062 /* Error-catcher for target_make_corefile_notes. */
3064 dummy_make_corefile_notes (struct target_ops
*self
,
3065 bfd
*ignore1
, int *ignore2
)
3067 error (_("Command not implemented for this target."));
3071 /* Set up the handful of non-empty slots needed by the dummy target
3075 init_dummy_target (void)
3077 dummy_target
.to_shortname
= "None";
3078 dummy_target
.to_longname
= "None";
3079 dummy_target
.to_doc
= "";
3080 dummy_target
.to_supports_disable_randomization
3081 = find_default_supports_disable_randomization
;
3082 dummy_target
.to_stratum
= dummy_stratum
;
3083 dummy_target
.to_has_all_memory
= return_zero
;
3084 dummy_target
.to_has_memory
= return_zero
;
3085 dummy_target
.to_has_stack
= return_zero
;
3086 dummy_target
.to_has_registers
= return_zero
;
3087 dummy_target
.to_has_execution
= return_zero_has_execution
;
3088 dummy_target
.to_magic
= OPS_MAGIC
;
3090 install_dummy_methods (&dummy_target
);
3095 target_close (struct target_ops
*targ
)
3097 gdb_assert (!target_is_pushed (targ
));
3099 if (targ
->to_xclose
!= NULL
)
3100 targ
->to_xclose (targ
);
3101 else if (targ
->to_close
!= NULL
)
3102 targ
->to_close (targ
);
3105 fprintf_unfiltered (gdb_stdlog
, "target_close ()\n");
3109 target_thread_alive (ptid_t ptid
)
3111 return current_target
.to_thread_alive (¤t_target
, ptid
);
3115 target_update_thread_list (void)
3117 current_target
.to_update_thread_list (¤t_target
);
3121 target_stop (ptid_t ptid
)
3125 warning (_("May not interrupt or stop the target, ignoring attempt"));
3129 (*current_target
.to_stop
) (¤t_target
, ptid
);
3132 /* See target/target.h. */
3135 target_stop_and_wait (ptid_t ptid
)
3137 struct target_waitstatus status
;
3138 int was_non_stop
= non_stop
;
3143 memset (&status
, 0, sizeof (status
));
3144 target_wait (ptid
, &status
, 0);
3146 non_stop
= was_non_stop
;
3149 /* See target/target.h. */
3152 target_continue_no_signal (ptid_t ptid
)
3154 target_resume (ptid
, 0, GDB_SIGNAL_0
);
3157 /* Concatenate ELEM to LIST, a comma separate list, and return the
3158 result. The LIST incoming argument is released. */
3161 str_comma_list_concat_elem (char *list
, const char *elem
)
3164 return xstrdup (elem
);
3166 return reconcat (list
, list
, ", ", elem
, (char *) NULL
);
3169 /* Helper for target_options_to_string. If OPT is present in
3170 TARGET_OPTIONS, append the OPT_STR (string version of OPT) in RET.
3171 Returns the new resulting string. OPT is removed from
3175 do_option (int *target_options
, char *ret
,
3176 int opt
, char *opt_str
)
3178 if ((*target_options
& opt
) != 0)
3180 ret
= str_comma_list_concat_elem (ret
, opt_str
);
3181 *target_options
&= ~opt
;
3188 target_options_to_string (int target_options
)
3192 #define DO_TARG_OPTION(OPT) \
3193 ret = do_option (&target_options, ret, OPT, #OPT)
3195 DO_TARG_OPTION (TARGET_WNOHANG
);
3197 if (target_options
!= 0)
3198 ret
= str_comma_list_concat_elem (ret
, "unknown???");
3206 debug_print_register (const char * func
,
3207 struct regcache
*regcache
, int regno
)
3209 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
3211 fprintf_unfiltered (gdb_stdlog
, "%s ", func
);
3212 if (regno
>= 0 && regno
< gdbarch_num_regs (gdbarch
)
3213 && gdbarch_register_name (gdbarch
, regno
) != NULL
3214 && gdbarch_register_name (gdbarch
, regno
)[0] != '\0')
3215 fprintf_unfiltered (gdb_stdlog
, "(%s)",
3216 gdbarch_register_name (gdbarch
, regno
));
3218 fprintf_unfiltered (gdb_stdlog
, "(%d)", regno
);
3219 if (regno
>= 0 && regno
< gdbarch_num_regs (gdbarch
))
3221 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
3222 int i
, size
= register_size (gdbarch
, regno
);
3223 gdb_byte buf
[MAX_REGISTER_SIZE
];
3225 regcache_raw_collect (regcache
, regno
, buf
);
3226 fprintf_unfiltered (gdb_stdlog
, " = ");
3227 for (i
= 0; i
< size
; i
++)
3229 fprintf_unfiltered (gdb_stdlog
, "%02x", buf
[i
]);
3231 if (size
<= sizeof (LONGEST
))
3233 ULONGEST val
= extract_unsigned_integer (buf
, size
, byte_order
);
3235 fprintf_unfiltered (gdb_stdlog
, " %s %s",
3236 core_addr_to_string_nz (val
), plongest (val
));
3239 fprintf_unfiltered (gdb_stdlog
, "\n");
3243 target_fetch_registers (struct regcache
*regcache
, int regno
)
3245 current_target
.to_fetch_registers (¤t_target
, regcache
, regno
);
3247 debug_print_register ("target_fetch_registers", regcache
, regno
);
3251 target_store_registers (struct regcache
*regcache
, int regno
)
3253 struct target_ops
*t
;
3255 if (!may_write_registers
)
3256 error (_("Writing to registers is not allowed (regno %d)"), regno
);
3258 current_target
.to_store_registers (¤t_target
, regcache
, regno
);
3261 debug_print_register ("target_store_registers", regcache
, regno
);
3266 target_core_of_thread (ptid_t ptid
)
3268 return current_target
.to_core_of_thread (¤t_target
, ptid
);
3272 simple_verify_memory (struct target_ops
*ops
,
3273 const gdb_byte
*data
, CORE_ADDR lma
, ULONGEST size
)
3275 LONGEST total_xfered
= 0;
3277 while (total_xfered
< size
)
3279 ULONGEST xfered_len
;
3280 enum target_xfer_status status
;
3282 ULONGEST howmuch
= min (sizeof (buf
), size
- total_xfered
);
3284 status
= target_xfer_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
3285 buf
, NULL
, lma
+ total_xfered
, howmuch
,
3287 if (status
== TARGET_XFER_OK
3288 && memcmp (data
+ total_xfered
, buf
, xfered_len
) == 0)
3290 total_xfered
+= xfered_len
;
3299 /* Default implementation of memory verification. */
3302 default_verify_memory (struct target_ops
*self
,
3303 const gdb_byte
*data
, CORE_ADDR memaddr
, ULONGEST size
)
3305 /* Start over from the top of the target stack. */
3306 return simple_verify_memory (current_target
.beneath
,
3307 data
, memaddr
, size
);
3311 target_verify_memory (const gdb_byte
*data
, CORE_ADDR memaddr
, ULONGEST size
)
3313 return current_target
.to_verify_memory (¤t_target
,
3314 data
, memaddr
, size
);
3317 /* The documentation for this function is in its prototype declaration in
3321 target_insert_mask_watchpoint (CORE_ADDR addr
, CORE_ADDR mask
, int rw
)
3323 return current_target
.to_insert_mask_watchpoint (¤t_target
,
3327 /* The documentation for this function is in its prototype declaration in
3331 target_remove_mask_watchpoint (CORE_ADDR addr
, CORE_ADDR mask
, int rw
)
3333 return current_target
.to_remove_mask_watchpoint (¤t_target
,
3337 /* The documentation for this function is in its prototype declaration
3341 target_masked_watch_num_registers (CORE_ADDR addr
, CORE_ADDR mask
)
3343 return current_target
.to_masked_watch_num_registers (¤t_target
,
3347 /* The documentation for this function is in its prototype declaration
3351 target_ranged_break_num_registers (void)
3353 return current_target
.to_ranged_break_num_registers (¤t_target
);
3358 struct btrace_target_info
*
3359 target_enable_btrace (ptid_t ptid
)
3361 return current_target
.to_enable_btrace (¤t_target
, ptid
);
3367 target_disable_btrace (struct btrace_target_info
*btinfo
)
3369 current_target
.to_disable_btrace (¤t_target
, btinfo
);
3375 target_teardown_btrace (struct btrace_target_info
*btinfo
)
3377 current_target
.to_teardown_btrace (¤t_target
, btinfo
);
3383 target_read_btrace (VEC (btrace_block_s
) **btrace
,
3384 struct btrace_target_info
*btinfo
,
3385 enum btrace_read_type type
)
3387 return current_target
.to_read_btrace (¤t_target
, btrace
, btinfo
, type
);
3393 target_stop_recording (void)
3395 current_target
.to_stop_recording (¤t_target
);
3401 target_save_record (const char *filename
)
3403 current_target
.to_save_record (¤t_target
, filename
);
3409 target_supports_delete_record (void)
3411 struct target_ops
*t
;
3413 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3414 if (t
->to_delete_record
!= delegate_delete_record
3415 && t
->to_delete_record
!= tdefault_delete_record
)
3424 target_delete_record (void)
3426 current_target
.to_delete_record (¤t_target
);
3432 target_record_is_replaying (void)
3434 return current_target
.to_record_is_replaying (¤t_target
);
3440 target_goto_record_begin (void)
3442 current_target
.to_goto_record_begin (¤t_target
);
3448 target_goto_record_end (void)
3450 current_target
.to_goto_record_end (¤t_target
);
3456 target_goto_record (ULONGEST insn
)
3458 current_target
.to_goto_record (¤t_target
, insn
);
3464 target_insn_history (int size
, int flags
)
3466 current_target
.to_insn_history (¤t_target
, size
, flags
);
3472 target_insn_history_from (ULONGEST from
, int size
, int flags
)
3474 current_target
.to_insn_history_from (¤t_target
, from
, size
, flags
);
3480 target_insn_history_range (ULONGEST begin
, ULONGEST end
, int flags
)
3482 current_target
.to_insn_history_range (¤t_target
, begin
, end
, flags
);
3488 target_call_history (int size
, int flags
)
3490 current_target
.to_call_history (¤t_target
, size
, flags
);
3496 target_call_history_from (ULONGEST begin
, int size
, int flags
)
3498 current_target
.to_call_history_from (¤t_target
, begin
, size
, flags
);
3504 target_call_history_range (ULONGEST begin
, ULONGEST end
, int flags
)
3506 current_target
.to_call_history_range (¤t_target
, begin
, end
, flags
);
3511 const struct frame_unwind
*
3512 target_get_unwinder (void)
3514 return current_target
.to_get_unwinder (¤t_target
);
3519 const struct frame_unwind
*
3520 target_get_tailcall_unwinder (void)
3522 return current_target
.to_get_tailcall_unwinder (¤t_target
);
3525 /* Default implementation of to_decr_pc_after_break. */
3528 default_target_decr_pc_after_break (struct target_ops
*ops
,
3529 struct gdbarch
*gdbarch
)
3531 return gdbarch_decr_pc_after_break (gdbarch
);
3537 target_decr_pc_after_break (struct gdbarch
*gdbarch
)
3539 return current_target
.to_decr_pc_after_break (¤t_target
, gdbarch
);
3545 target_prepare_to_generate_core (void)
3547 current_target
.to_prepare_to_generate_core (¤t_target
);
3553 target_done_generating_core (void)
3555 current_target
.to_done_generating_core (¤t_target
);
3559 setup_target_debug (void)
3561 memcpy (&debug_target
, ¤t_target
, sizeof debug_target
);
3563 init_debug_target (¤t_target
);
3567 static char targ_desc
[] =
3568 "Names of targets and files being debugged.\nShows the entire \
3569 stack of targets currently in use (including the exec-file,\n\
3570 core-file, and process, if any), as well as the symbol file name.";
3573 default_rcmd (struct target_ops
*self
, const char *command
,
3574 struct ui_file
*output
)
3576 error (_("\"monitor\" command not supported by this target."));
3580 do_monitor_command (char *cmd
,
3583 target_rcmd (cmd
, gdb_stdtarg
);
3586 /* Print the name of each layers of our target stack. */
3589 maintenance_print_target_stack (char *cmd
, int from_tty
)
3591 struct target_ops
*t
;
3593 printf_filtered (_("The current target stack is:\n"));
3595 for (t
= target_stack
; t
!= NULL
; t
= t
->beneath
)
3597 printf_filtered (" - %s (%s)\n", t
->to_shortname
, t
->to_longname
);
3601 /* Controls if targets can report that they can/are async. This is
3602 just for maintainers to use when debugging gdb. */
3603 int target_async_permitted
= 1;
3605 /* The set command writes to this variable. If the inferior is
3606 executing, target_async_permitted is *not* updated. */
3607 static int target_async_permitted_1
= 1;
3610 maint_set_target_async_command (char *args
, int from_tty
,
3611 struct cmd_list_element
*c
)
3613 if (have_live_inferiors ())
3615 target_async_permitted_1
= target_async_permitted
;
3616 error (_("Cannot change this setting while the inferior is running."));
3619 target_async_permitted
= target_async_permitted_1
;
3623 maint_show_target_async_command (struct ui_file
*file
, int from_tty
,
3624 struct cmd_list_element
*c
,
3627 fprintf_filtered (file
,
3628 _("Controlling the inferior in "
3629 "asynchronous mode is %s.\n"), value
);
3632 /* Temporary copies of permission settings. */
3634 static int may_write_registers_1
= 1;
3635 static int may_write_memory_1
= 1;
3636 static int may_insert_breakpoints_1
= 1;
3637 static int may_insert_tracepoints_1
= 1;
3638 static int may_insert_fast_tracepoints_1
= 1;
3639 static int may_stop_1
= 1;
3641 /* Make the user-set values match the real values again. */
3644 update_target_permissions (void)
3646 may_write_registers_1
= may_write_registers
;
3647 may_write_memory_1
= may_write_memory
;
3648 may_insert_breakpoints_1
= may_insert_breakpoints
;
3649 may_insert_tracepoints_1
= may_insert_tracepoints
;
3650 may_insert_fast_tracepoints_1
= may_insert_fast_tracepoints
;
3651 may_stop_1
= may_stop
;
3654 /* The one function handles (most of) the permission flags in the same
3658 set_target_permissions (char *args
, int from_tty
,
3659 struct cmd_list_element
*c
)
3661 if (target_has_execution
)
3663 update_target_permissions ();
3664 error (_("Cannot change this setting while the inferior is running."));
3667 /* Make the real values match the user-changed values. */
3668 may_write_registers
= may_write_registers_1
;
3669 may_insert_breakpoints
= may_insert_breakpoints_1
;
3670 may_insert_tracepoints
= may_insert_tracepoints_1
;
3671 may_insert_fast_tracepoints
= may_insert_fast_tracepoints_1
;
3672 may_stop
= may_stop_1
;
3673 update_observer_mode ();
3676 /* Set memory write permission independently of observer mode. */
3679 set_write_memory_permission (char *args
, int from_tty
,
3680 struct cmd_list_element
*c
)
3682 /* Make the real values match the user-changed values. */
3683 may_write_memory
= may_write_memory_1
;
3684 update_observer_mode ();
3689 initialize_targets (void)
3691 init_dummy_target ();
3692 push_target (&dummy_target
);
3694 add_info ("target", target_info
, targ_desc
);
3695 add_info ("files", target_info
, targ_desc
);
3697 add_setshow_zuinteger_cmd ("target", class_maintenance
, &targetdebug
, _("\
3698 Set target debugging."), _("\
3699 Show target debugging."), _("\
3700 When non-zero, target debugging is enabled. Higher numbers are more\n\
3704 &setdebuglist
, &showdebuglist
);
3706 add_setshow_boolean_cmd ("trust-readonly-sections", class_support
,
3707 &trust_readonly
, _("\
3708 Set mode for reading from readonly sections."), _("\
3709 Show mode for reading from readonly sections."), _("\
3710 When this mode is on, memory reads from readonly sections (such as .text)\n\
3711 will be read from the object file instead of from the target. This will\n\
3712 result in significant performance improvement for remote targets."),
3714 show_trust_readonly
,
3715 &setlist
, &showlist
);
3717 add_com ("monitor", class_obscure
, do_monitor_command
,
3718 _("Send a command to the remote monitor (remote targets only)."));
3720 add_cmd ("target-stack", class_maintenance
, maintenance_print_target_stack
,
3721 _("Print the name of each layer of the internal target stack."),
3722 &maintenanceprintlist
);
3724 add_setshow_boolean_cmd ("target-async", no_class
,
3725 &target_async_permitted_1
, _("\
3726 Set whether gdb controls the inferior in asynchronous mode."), _("\
3727 Show whether gdb controls the inferior in asynchronous mode."), _("\
3728 Tells gdb whether to control the inferior in asynchronous mode."),
3729 maint_set_target_async_command
,
3730 maint_show_target_async_command
,
3731 &maintenance_set_cmdlist
,
3732 &maintenance_show_cmdlist
);
3734 add_setshow_boolean_cmd ("may-write-registers", class_support
,
3735 &may_write_registers_1
, _("\
3736 Set permission to write into registers."), _("\
3737 Show permission to write into registers."), _("\
3738 When this permission is on, GDB may write into the target's registers.\n\
3739 Otherwise, any sort of write attempt will result in an error."),
3740 set_target_permissions
, NULL
,
3741 &setlist
, &showlist
);
3743 add_setshow_boolean_cmd ("may-write-memory", class_support
,
3744 &may_write_memory_1
, _("\
3745 Set permission to write into target memory."), _("\
3746 Show permission to write into target memory."), _("\
3747 When this permission is on, GDB may write into the target's memory.\n\
3748 Otherwise, any sort of write attempt will result in an error."),
3749 set_write_memory_permission
, NULL
,
3750 &setlist
, &showlist
);
3752 add_setshow_boolean_cmd ("may-insert-breakpoints", class_support
,
3753 &may_insert_breakpoints_1
, _("\
3754 Set permission to insert breakpoints in the target."), _("\
3755 Show permission to insert breakpoints in the target."), _("\
3756 When this permission is on, GDB may insert breakpoints in the program.\n\
3757 Otherwise, any sort of insertion attempt will result in an error."),
3758 set_target_permissions
, NULL
,
3759 &setlist
, &showlist
);
3761 add_setshow_boolean_cmd ("may-insert-tracepoints", class_support
,
3762 &may_insert_tracepoints_1
, _("\
3763 Set permission to insert tracepoints in the target."), _("\
3764 Show permission to insert tracepoints in the target."), _("\
3765 When this permission is on, GDB may insert tracepoints in the program.\n\
3766 Otherwise, any sort of insertion attempt will result in an error."),
3767 set_target_permissions
, NULL
,
3768 &setlist
, &showlist
);
3770 add_setshow_boolean_cmd ("may-insert-fast-tracepoints", class_support
,
3771 &may_insert_fast_tracepoints_1
, _("\
3772 Set permission to insert fast tracepoints in the target."), _("\
3773 Show permission to insert fast tracepoints in the target."), _("\
3774 When this permission is on, GDB may insert fast tracepoints.\n\
3775 Otherwise, any sort of insertion attempt will result in an error."),
3776 set_target_permissions
, NULL
,
3777 &setlist
, &showlist
);
3779 add_setshow_boolean_cmd ("may-interrupt", class_support
,
3781 Set permission to interrupt or signal the target."), _("\
3782 Show permission to interrupt or signal the target."), _("\
3783 When this permission is on, GDB may interrupt/stop the target's execution.\n\
3784 Otherwise, any attempt to interrupt or stop will be ignored."),
3785 set_target_permissions
, NULL
,
3786 &setlist
, &showlist
);
3788 add_setshow_boolean_cmd ("auto-connect-native-target", class_support
,
3789 &auto_connect_native_target
, _("\
3790 Set whether GDB may automatically connect to the native target."), _("\
3791 Show whether GDB may automatically connect to the native target."), _("\
3792 When on, and GDB is not connected to a target yet, GDB\n\
3793 attempts \"run\" and other commands with the native target."),
3794 NULL
, show_auto_connect_native_target
,
3795 &setlist
, &showlist
);